aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/iio
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/staging/iio')
-rw-r--r--drivers/staging/iio/Documentation/sysfs-bus-iio713
-rw-r--r--drivers/staging/iio/accel/accel.h87
-rw-r--r--drivers/staging/iio/accel/adis16201_ring.c152
-rw-r--r--drivers/staging/iio/accel/adis16201_trigger.c71
-rw-r--r--drivers/staging/iio/accel/adis16203_ring.c158
-rw-r--r--drivers/staging/iio/accel/adis16203_trigger.c74
-rw-r--r--drivers/staging/iio/accel/adis16204_ring.c154
-rw-r--r--drivers/staging/iio/accel/adis16204_trigger.c74
-rw-r--r--drivers/staging/iio/accel/adis16209_ring.c157
-rw-r--r--drivers/staging/iio/accel/adis16209_trigger.c82
-rw-r--r--drivers/staging/iio/accel/adis16240_ring.c152
-rw-r--r--drivers/staging/iio/accel/adis16240_trigger.c83
-rw-r--r--drivers/staging/iio/accel/inclinometer.h25
-rw-r--r--drivers/staging/iio/adc/ad7150.c812
-rw-r--r--drivers/staging/iio/adc/ad7152.c586
-rw-r--r--drivers/staging/iio/adc/ad7298.h76
-rw-r--r--drivers/staging/iio/adc/ad7298_core.c299
-rw-r--r--drivers/staging/iio/adc/ad7298_ring.c202
-rw-r--r--drivers/staging/iio/adc/ad7314.c281
-rw-r--r--drivers/staging/iio/adc/ad7476.h72
-rw-r--r--drivers/staging/iio/adc/ad7476_core.c270
-rw-r--r--drivers/staging/iio/adc/ad7476_ring.c165
-rw-r--r--drivers/staging/iio/adc/ad7745.c674
-rw-r--r--drivers/staging/iio/adc/ad7793.c987
-rw-r--r--drivers/staging/iio/adc/ad7793.h107
-rw-r--r--drivers/staging/iio/adc/ad7887.h105
-rw-r--r--drivers/staging/iio/adc/ad7887_core.c266
-rw-r--r--drivers/staging/iio/adc/ad7887_ring.c202
-rw-r--r--drivers/staging/iio/adc/adc.h42
-rw-r--r--drivers/staging/iio/adc/adt7310.c904
-rw-r--r--drivers/staging/iio/adc/adt75.c657
-rw-r--r--drivers/staging/iio/adc/max1363.h175
-rw-r--r--drivers/staging/iio/adc/max1363_core.c1433
-rw-r--r--drivers/staging/iio/adc/max1363_ring.c209
-rw-r--r--drivers/staging/iio/chrdev.h75
-rw-r--r--drivers/staging/iio/dac/Kconfig64
-rw-r--r--drivers/staging/iio/dac/Makefile10
-rw-r--r--drivers/staging/iio/dac/ad5446.c480
-rw-r--r--drivers/staging/iio/dac/ad5446.h109
-rw-r--r--drivers/staging/iio/dac/ad5504.c397
-rw-r--r--drivers/staging/iio/dac/ad5504.h68
-rw-r--r--drivers/staging/iio/dac/ad5624r.h79
-rw-r--r--drivers/staging/iio/dac/ad5624r_spi.c336
-rw-r--r--drivers/staging/iio/dac/ad5686.c497
-rw-r--r--drivers/staging/iio/dac/ad5791.c442
-rw-r--r--drivers/staging/iio/dac/ad5791.h114
-rw-r--r--drivers/staging/iio/dac/dac.h6
-rw-r--r--drivers/staging/iio/dac/max517.c295
-rw-r--r--drivers/staging/iio/dac/max517.h19
-rw-r--r--drivers/staging/iio/dds/Kconfig59
-rw-r--r--drivers/staging/iio/dds/Makefile11
-rw-r--r--drivers/staging/iio/dds/ad5930.c159
-rw-r--r--drivers/staging/iio/dds/ad9832.c372
-rw-r--r--drivers/staging/iio/dds/ad9832.h126
-rw-r--r--drivers/staging/iio/dds/ad9834.c464
-rw-r--r--drivers/staging/iio/dds/ad9834.h112
-rw-r--r--drivers/staging/iio/dds/ad9850.c145
-rw-r--r--drivers/staging/iio/dds/ad9852.c297
-rw-r--r--drivers/staging/iio/dds/ad9910.c430
-rw-r--r--drivers/staging/iio/dds/ad9951.c241
-rw-r--r--drivers/staging/iio/dds/dds.h110
-rw-r--r--drivers/staging/iio/gyro/adis16260_ring.c155
-rw-r--r--drivers/staging/iio/gyro/adis16260_trigger.c76
-rw-r--r--drivers/staging/iio/gyro/gyro.h85
-rw-r--r--drivers/staging/iio/iio.h439
-rw-r--r--drivers/staging/iio/industrialio-core.c1245
-rw-r--r--drivers/staging/iio/industrialio-ring.c596
-rw-r--r--drivers/staging/iio/industrialio-trigger.c525
-rw-r--r--drivers/staging/iio/kfifo_buf.c203
-rw-r--r--drivers/staging/iio/kfifo_buf.h18
-rw-r--r--drivers/staging/iio/light/ltr558als.c883
-rw-r--r--drivers/staging/iio/light/ltr558als.h76
-rw-r--r--drivers/staging/iio/magnetometer/magnet.h31
-rw-r--r--drivers/staging/iio/resolver/ad2s120x.c177
-rw-r--r--drivers/staging/iio/ring_generic.h288
-rw-r--r--drivers/staging/iio/sysfs.h222
-rw-r--r--drivers/staging/iio/trigger.h188
-rw-r--r--drivers/staging/iio/trigger_consumer.h47
78 files changed, 21277 insertions, 0 deletions
diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio
new file mode 100644
index 00000000000..467c49a4725
--- /dev/null
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio
@@ -0,0 +1,713 @@
1What: /sys/bus/iio/devices/deviceX
2KernelVersion: 2.6.35
3Contact: linux-iio@vger.kernel.org
4Description:
5 Hardware chip or device accessed by on communication port.
6 Corresponds to a grouping of sensor channels. X is the IIO
7 index of the device.
8
9What: /sys/bus/iio/devices/device[n]/power_state
10KernelVersion: 2.6.37
11Contact: linux-iio@vger.kernel.org
12Description:
13 This property gets/sets the device power state.
14
15What: /sys/bus/iio/devices/triggerX
16KernelVersion: 2.6.35
17Contact: linux-iio@vger.kernel.org
18Description:
19 An event driven driver of data capture to an in kernel buffer.
20 May be provided by a device driver that also has an IIO device
21 based on hardware generated events (e.g. data ready) or
22 provided by a separate driver for other hardware (e.g.
23 periodic timer, GPIO or high resolution timer).
24 Contains trigger type specific elements. These do not
25 generalize well and hence are not documented in this file.
26 X is the IIO index of the trigger.
27
28What: /sys/bus/iio/devices/deviceX:buffer
29KernelVersion: 2.6.35
30Contact: linux-iio@vger.kernel.org
31Description:
32 Link to /sys/class/iio/deviceX/deviceX:buffer. X indicates
33 the device with which this buffer buffer is associated.
34
35What: /sys/bus/iio/devices/deviceX/name
36KernelVersion: 2.6.35
37Contact: linux-iio@vger.kernel.org
38Description:
39 Description of the physical chip / device for device X.
40 Typically a part number.
41
42What: /sys/bus/iio/devices/deviceX/sampling_frequency
43KernelVersion: 2.6.35
44Contact: linux-iio@vger.kernel.org
45Description:
46 Some devices have internal clocks. This parameter sets the
47 resulting sampling frequency. In many devices this
48 parameter has an effect on input filters etc rather than
49 simply controlling when the input is sampled. As this
50 effects datardy triggers, hardware buffers and the sysfs
51 direct access interfaces, it may be found in any of the
52 relevant directories. If it effects all of the above
53 then it is to be found in the base device directory as here.
54
55What: /sys/bus/iio/devices/deviceX/sampling_frequency_available
56KernelVersion: 2.6.35
57Contact: linux-iio@vger.kernel.org
58Description:
59 When the internal sampling clock can only take a small
60 discrete set of values, this file lists those available.
61
62What: /sys/bus/iio/devices/deviceX/range
63KernelVersion: 2.6.38
64Contact: linux-iio@vger.kernel.org
65Description:
66 Hardware dependent ADC Full Scale Range in mVolt.
67
68What: /sys/bus/iio/devices/deviceX/range_available
69KernelVersion: 2.6.38
70Contact: linux-iio@vger.kernel.org
71Description:
72 Hardware dependent supported vales for ADC Full Scale Range.
73
74What: /sys/bus/iio/devices/deviceX/oversampling_ratio
75KernelVersion: 2.6.38
76Contact: linux-iio@vger.kernel.org
77Description:
78 Hardware dependent ADC oversampling. Controls the sampling ratio
79 of the digital filter if available.
80
81What: /sys/bus/iio/devices/deviceX/oversampling_ratio_available
82KernelVersion: 2.6.38
83Contact: linux-iio@vger.kernel.org
84Description:
85 Hardware dependent values supported by the oversampling filter.
86
87What: /sys/bus/iio/devices/deviceX/inY_raw
88What: /sys/bus/iio/devices/deviceX/inY_supply_raw
89KernelVersion: 2.6.35
90Contact: linux-iio@vger.kernel.org
91Description:
92 Raw (unscaled no bias removal etc) voltage measurement from
93 channel Y. In special cases where the channel does not
94 correspond to externally available input one of the named
95 versions may be used. The number must always be specified and
96 unique to allow association with event codes.
97
98What: /sys/bus/iio/devices/deviceX/inY-inZ_raw
99KernelVersion: 2.6.35
100Contact: linux-iio@vger.kernel.org
101Description:
102 Raw (unscaled) differential voltage measurement equivalent to
103 channel Y - channel Z where these channel numbers apply to the
104 physically equivalent inputs when non differential readings are
105 separately available. In differential only parts, then all that
106 is required is a consistent labeling.
107
108What: /sys/bus/iio/devices/deviceX/temp_raw
109What: /sys/bus/iio/devices/deviceX/temp_x_raw
110What: /sys/bus/iio/devices/deviceX/temp_y_raw
111What: /sys/bus/iio/devices/deviceX/temp_z_raw
112KernelVersion: 2.6.35
113Contact: linux-iio@vger.kernel.org
114Description:
115 Raw (unscaled no bias removal etc) temperature measurement.
116 It an axis is specified it generally means that the temperature
117 sensor is associated with one part of a compound device (e.g.
118 a gyroscope axis).
119
120What: /sys/bus/iio/devices/deviceX/tempX_input
121KernelVersion: 2.6.38
122Contact: linux-iio@vger.kernel.org
123Description:
124 Scaled temperature measurement in milli degrees Celsius.
125
126What: /sys/bus/iio/devices/deviceX/accel_x_raw
127What: /sys/bus/iio/devices/deviceX/accel_y_raw
128What: /sys/bus/iio/devices/deviceX/accel_z_raw
129KernelVersion: 2.6.35
130Contact: linux-iio@vger.kernel.org
131Description:
132 Acceleration in direction x, y or z (may be arbitrarily assigned
133 but should match other such assignments on device)
134 channel m (not present if only one accelerometer channel at
135 this orientation). Has all of the equivalent parameters as per
136 inY. Units after application of scale and offset are m/s^2.
137
138What: /sys/bus/iio/devices/deviceX/gyro_x_raw
139What: /sys/bus/iio/devices/deviceX/gyro_y_raw
140What: /sys/bus/iio/devices/deviceX/gyro_z_raw
141KernelVersion: 2.6.35
142Contact: linux-iio@vger.kernel.org
143Description:
144 Angular velocity about axis x, y or z (may be arbitrarily
145 assigned) Data converted by application of offset then scale to
146 radians per second. Has all the equivalent parameters as
147 per inY.
148
149What: /sys/bus/iio/devices/deviceX/incli_x_raw
150What: /sys/bus/iio/devices/deviceX/incli_y_raw
151What: /sys/bus/iio/devices/deviceX/incli_z_raw
152KernelVersion: 2.6.35
153Contact: linux-iio@vger.kernel.org
154Description:
155 Inclination raw reading about axis x, y or z (may be
156 arbitrarily assigned). Data converted by application of offset
157 and scale to Degrees.
158
159What: /sys/bus/iio/devices/deviceX/magn_x_raw
160What: /sys/bus/iio/devices/deviceX/magn_y_raw
161What: /sys/bus/iio/devices/deviceX/magn_z_raw
162KernelVersion: 2.6.35
163Contact: linux-iio@vger.kernel.org
164Description:
165 Magnetic field along axis x, y or z (may be arbitrarily
166 assigned) channel m (not present if only one magnetometer
167 at this orientation). Data converted by application of
168 offset then scale to Gauss. Has all the equivalent modifiers
169 as per inY.
170
171What: /sys/bus/iio/devices/deviceX/accel_x_peak_raw
172What: /sys/bus/iio/devices/deviceX/accel_y_peak_raw
173What: /sys/bus/iio/devices/deviceX/accel_z_peak_raw
174KernelVersion: 2.6.36
175Contact: linux-iio@vger.kernel.org
176Description:
177 Some devices provide a store of the highest value seen since
178 some reset condition. These attributes allow access to this
179 and are otherwise the direct equivalent of the
180 <type>Y[_name]_raw attributes.
181
182What: /sys/bus/iio/devices/deviceX/accel_xyz_squared_peak_raw
183KernelVersion: 2.6.36
184Contact: linux-iio@vger.kernel.org
185Description:
186 A computed peak value based on the sum squared magnitude of
187 the underlying value in the specified directions.
188
189What: /sys/bus/iio/devices/deviceX/accel_offset
190What: /sys/bus/iio/devices/deviceX/temp_offset
191KernelVersion: 2.6.35
192Contact: linux-iio@vger.kernel.org
193Description:
194 If known for a device, offset to be added to <type>[Y]_raw prior
195 to scaling by <type>[Y]_scale in order to obtain value in the
196 <type> units as specified in <type>[y]_raw documentation.
197 Not present if the offset is always 0 or unknown. If Y is not
198 present, then the offset applies to all in channels of <type>.
199 May be writable if a variable offset can be applied on the
200 device. Note that this is different to calibbias which
201 is for devices (or drivers) that apply offsets to compensate
202 for variation between different instances of the part, typically
203 adjusted by using some hardware supported calibration procedure.
204
205What: /sys/bus/iio/devices/deviceX/inY_scale
206What: /sys/bus/iio/devices/deviceX/inY_supply_scale
207What: /sys/bus/iio/devices/deviceX/in_scale
208What: /sys/bus/iio/devices/deviceX/outY_scale
209What: /sys/bus/iio/devices/deviceX/accel_scale
210What: /sys/bus/iio/devices/deviceX/accel_peak_scale
211What: /sys/bus/iio/devices/deviceX/gyro_scale
212What: /sys/bus/iio/devices/deviceX/magn_scale
213What: /sys/bus/iio/devices/deviceX/magn_x_scale
214What: /sys/bus/iio/devices/deviceX/magn_y_scale
215What: /sys/bus/iio/devices/deviceX/magn_z_scale
216KernelVersion: 2.6.35
217Contact: linux-iio@vger.kernel.org
218Description:
219 If known for a device, scale to be applied to <type>Y[_name]_raw
220 post addition of <type>[Y][_name]_offset in order to obtain the
221 measured value in <type> units as specified in
222 <type>[Y][_name]_raw documentation.. If shared across all in
223 channels then Y is not present and the value is called
224 <type>[Y][_name]_scale. The peak modifier means this value
225 is applied to <type>Y[_name]_peak_raw values.
226
227What: /sys/bus/iio/devices/deviceX/accel_x_calibbias
228What: /sys/bus/iio/devices/deviceX/accel_y_calibbias
229What: /sys/bus/iio/devices/deviceX/accel_z_calibbias
230What: /sys/bus/iio/devices/deviceX/gyro_x_calibbias
231What: /sys/bus/iio/devices/deviceX/gyro_y_calibbias
232What: /sys/bus/iio/devices/deviceX/gyro_z_calibbias
233KernelVersion: 2.6.35
234Contact: linux-iio@vger.kernel.org
235Description:
236 Hardware applied calibration offset. (assumed to fix production
237 inaccuracies). If shared across all channels, <type>_calibbias
238 is used.
239
240What /sys/bus/iio/devices/deviceX/inY_calibscale
241What /sys/bus/iio/devices/deviceX/inY_supply_calibscale
242What /sys/bus/iio/devices/deviceX/in_calibscale
243What /sys/bus/iio/devices/deviceX/accel_x_calibscale
244What /sys/bus/iio/devices/deviceX/accel_y_calibscale
245What /sys/bus/iio/devices/deviceX/accel_z_calibscale
246What /sys/bus/iio/devices/deviceX/gyro_x_calibscale
247What /sys/bus/iio/devices/deviceX/gyro_y_calibscale
248What /sys/bus/iio/devices/deviceX/gyro_z_calibscale
249KernelVersion: 2.6.35
250Contact: linux-iio@vger.kernel.org
251Description:
252 Hardware applied calibration scale factor. (assumed to fix
253 production inaccuracies). If shared across all channels,
254 <type>_calibscale is used.
255
256What: /sys/bus/iio/devices/deviceX/accel_scale_available
257KernelVersion: 2.635
258Contact: linux-iio@vger.kernel.org
259Description:
260 If a discrete set of scale values are available, they
261 are listed in this attribute.
262
263What: /sys/bus/iio/devices/deviceX/outY_raw
264KernelVersion: 2.6.37
265Contact: linux-iio@vger.kernel.org
266Description:
267 Raw (unscaled, no bias etc.) output voltage for
268 channel Y. The number must always be specified and
269 unique if the output corresponds to a single channel.
270
271What: /sys/bus/iio/devices/deviceX/outY&Z_raw
272KernelVersion: 2.6.37
273Contact: linux-iio@vger.kernel.org
274Description:
275 Raw (unscaled, no bias etc.) output voltage for an aggregate of
276 channel Y, channel Z, etc. This interface is available in cases
277 where a single output sets the value for multiple channels
278 simultaneously.
279
280What: /sys/bus/iio/devices/deviceX/outY_powerdown_mode
281What: /sys/bus/iio/devices/deviceX/out_powerdown_mode
282KernelVersion: 2.6.38
283Contact: linux-iio@vger.kernel.org
284Description:
285 Specifies the output powerdown mode.
286 DAC output stage is disconnected from the amplifier and
287 1kohm_to_gnd: connected to ground via an 1kOhm resistor
288 100kohm_to_gnd: connected to ground via an 100kOhm resistor
289 three_state: left floating
290 For a list of available output power down options read
291 outX_powerdown_mode_available. If Y is not present the
292 mode is shared across all outputs.
293
294What: /sys/bus/iio/devices/deviceX/outY_powerdown_mode_available
295What: /sys/bus/iio/devices/deviceX/out_powerdown_mode_available
296KernelVersion: 2.6.38
297Contact: linux-iio@vger.kernel.org
298Description:
299 Lists all available output power down modes.
300 If Y is not present the mode is shared across all outputs.
301
302What: /sys/bus/iio/devices/deviceX/outY_powerdown
303What: /sys/bus/iio/devices/deviceX/out_powerdown
304KernelVersion: 2.6.38
305Contact: linux-iio@vger.kernel.org
306Description:
307 Writing 1 causes output Y to enter the power down mode specified
308 by the corresponding outY_powerdown_mode. Clearing returns to
309 normal operation. Y may be suppressed if all outputs are
310 controlled together.
311
312What: /sys/bus/iio/devices/deviceX/deviceX:eventY
313KernelVersion: 2.6.35
314Contact: linux-iio@vger.kernel.org
315Description:
316 Configuration of which hardware generated events are passed up
317 to user-space.
318
319What: /sys/bus/iio/devices/deviceX:event/dev
320What: /sys/bus/iio/devices/deviceX:eventY/dev
321KernelVersion: 2.6.35
322Contact: linux-iio@vger.kernel.org
323Description:
324 major:minor character device numbers for the event line Y of
325 device X.
326
327What: /sys/.../deviceX:eventY/accel_x_thresh_rising_en
328What: /sys/.../deviceX:eventY/accel_x_thresh_falling_en
329What: /sys/.../deviceX:eventY/accel_y_thresh_rising_en
330What: /sys/.../deviceX:eventY/accel_y_thresh_falling_en
331What: /sys/.../deviceX:eventY/accel_z_thresh_rising_en
332What: /sys/.../deviceX:eventY/accel_z_thresh_falling_en
333What: /sys/.../deviceX:eventY/gyro_x_thresh_rising_en
334What: /sys/.../deviceX:eventY/gyro_x_thresh_falling_en
335What: /sys/.../deviceX:eventY/gyro_y_thresh_rising_en
336What: /sys/.../deviceX:eventY/gyro_y_thresh_falling_en
337What: /sys/.../deviceX:eventY/gyro_z_thresh_rising_en
338What: /sys/.../deviceX:eventY/gyro_z_thresh_falling_en
339What: /sys/.../deviceX:eventY/magn_x_thresh_rising_en
340What: /sys/.../deviceX:eventY/magn_x_thresh_falling_en
341What: /sys/.../deviceX:eventY/magn_y_thresh_rising_en
342What: /sys/.../deviceX:eventY/magn_y_thresh_falling_en
343What: /sys/.../deviceX:eventY/magn_z_thresh_rising_en
344What: /sys/.../deviceX:eventY/magn_z_thresh_falling_en
345What: /sys/.../deviceX:eventY/inZ_supply_thresh_rising_en
346What: /sys/.../deviceX:eventY/inZ_supply_thresh_falling_en
347What: /sys/.../deviceX:eventY/inZ_thresh_rising_en
348What: /sys/.../deviceX:eventY/inZ_thresh_falling_en
349What: /sys/.../deviceX:eventY/temp_thresh_rising_en
350What: /sys/.../deviceX:eventY/temp_thresh_falling_en
351KernelVersion: 2.6.37
352Contact: linux-iio@vger.kernel.org
353Description:
354 Event generated when channel passes a threshold in the specified
355 (_rising|_falling) direction. If the direction is not specified,
356 then either the device will report an event which ever direction
357 a single threshold value is called in (e.g.
358 <type>[Z][_name]_<raw|input>_thresh_value) or
359 <type>[Z][_name]_<raw|input>_thresh_rising_value and
360 <type>[Z][_name]_<raw|input>_thresh_falling_value may take
361 different values, but the device can only enable both thresholds
362 or neither.
363 Note the driver will assume the last p events requested are
364 to be enabled where p is however many it supports (which may
365 vary depending on the exact set requested. So if you want to be
366 sure you have set what you think you have, check the contents of
367 these attributes after everything is configured. Drivers may
368 have to buffer any parameters so that they are consistent when
369 a given event type is enabled a future point (and not those for
370 whatever event was previously enabled).
371
372What: /sys/.../deviceX:eventY/accel_x_roc_rising_en
373What: /sys/.../deviceX:eventY/accel_x_roc_falling_en
374What: /sys/.../deviceX:eventY/accel_y_roc_rising_en
375What: /sys/.../deviceX:eventY/accel_y_roc_falling_en
376What: /sys/.../deviceX:eventY/accel_z_roc_rising_en
377What: /sys/.../deviceX:eventY/accel_z_roc_falling_en
378What: /sys/.../deviceX:eventY/gyro_x_roc_rising_en
379What: /sys/.../deviceX:eventY/gyro_x_roc_falling_en
380What: /sys/.../deviceX:eventY/gyro_y_roc_rising_en
381What: /sys/.../deviceX:eventY/gyro_y_roc_falling_en
382What: /sys/.../deviceX:eventY/gyro_z_roc_rising_en
383What: /sys/.../deviceX:eventY/gyro_z_roc_falling_en
384What: /sys/.../deviceX:eventY/magn_x_roc_rising_en
385What: /sys/.../deviceX:eventY/magn_x_roc_falling_en
386What: /sys/.../deviceX:eventY/magn_y_roc_rising_en
387What: /sys/.../deviceX:eventY/magn_y_roc_falling_en
388What: /sys/.../deviceX:eventY/magn_z_roc_rising_en
389What: /sys/.../deviceX:eventY/magn_z_roc_falling_en
390What: /sys/.../deviceX:eventY/inZ_supply_roc_rising_en
391What: /sys/.../deviceX:eventY/inZ_supply_roc_falling_en
392What: /sys/.../deviceX:eventY/inZ_roc_rising_en
393What: /sys/.../deviceX:eventY/inZ_roc_falling_en
394What: /sys/.../deviceX:eventY/temp_roc_rising_en
395What: /sys/.../deviceX:eventY/temp_roc_falling_en
396KernelVersion: 2.6.37
397Contact: linux-iio@vger.kernel.org
398Description:
399 Event generated when channel passes a threshold on the rate of
400 change (1st differential) in the specified (_rising|_falling)
401 direction. If the direction is not specified, then either the
402 device will report an event which ever direction a single
403 threshold value is called in (e.g.
404 <type>[Z][_name]_<raw|input>_roc_value) or
405 <type>[Z][_name]_<raw|input>_roc_rising_value and
406 <type>[Z][_name]_<raw|input>_roc_falling_value may take
407 different values, but the device can only enable both rate of
408 change thresholds or neither.
409 Note the driver will assume the last p events requested are
410 to be enabled where p is however many it supports (which may
411 vary depending on the exact set requested. So if you want to be
412 sure you have set what you think you have, check the contents of
413 these attributes after everything is configured. Drivers may
414 have to buffer any parameters so that they are consistent when
415 a given event type is enabled a future point (and not those for
416 whatever event was previously enabled).
417
418What: /sys/.../deviceX:eventY/accel_x_raw_thresh_rising_value
419What: /sys/.../deviceX:eventY/accel_x_raw_thresh_falling_value
420What: /sys/.../deviceX:eventY/accel_y_raw_thresh_rising_value
421What: /sys/.../deviceX:eventY/accel_y_raw_thresh_falling_value
422What: /sys/.../deviceX:eventY/accel_z_raw_thresh_rising_value
423What: /sys/.../deviceX:eventY/accel_z_raw_thresh_falling_value
424What: /sys/.../deviceX:eventY/gyro_x_raw_thresh_rising_value
425What: /sys/.../deviceX:eventY/gyro_x_raw_thresh_falling_value
426What: /sys/.../deviceX:eventY/gyro_y_raw_thresh_rising_value
427What: /sys/.../deviceX:eventY/gyro_y_raw_thresh_falling_value
428What: /sys/.../deviceX:eventY/gyro_z_raw_thresh_rising_value
429What: /sys/.../deviceX:eventY/gyro_z_raw_thresh_falling_value
430What: /sys/.../deviceX:eventY/magn_x_raw_thresh_rising_value
431What: /sys/.../deviceX:eventY/magn_x_raw_thresh_falling_value
432What: /sys/.../deviceX:eventY/magn_y_raw_thresh_rising_value
433What: /sys/.../deviceX:eventY/magn_y_raw_thresh_falling_value
434What: /sys/.../deviceX:eventY/magn_z_raw_thresh_rising_value
435What: /sys/.../deviceX:eventY/magn_z_raw_thresh_falling_value
436What: /sys/.../deviceX:eventY/inZ_supply_raw_thresh_rising_value
437What: /sys/.../deviceX:eventY/inZ_supply_raw_thresh_falling_value
438What: /sys/.../deviceX:eventY/inZ_raw_thresh_falling_value
439What: /sys/.../deviceX:eventY/inZ_raw_thresh_falling_value
440What: /sys/.../deviceX:eventY/temp_raw_thresh_falling_value
441What: /sys/.../deviceX:eventY/temp_raw_thresh_falling_value
442KernelVersion: 2.6.37
443Contact: linux-iio@vger.kernel.org
444Description:
445 Specifies the value of threshold that the device is comparing
446 against for the events enabled by
447 <type>Z[_name]_thresh[_rising|falling]_en.
448 If separate attributes exist for the two directions, but
449 direction is not specified for this attribute, then a single
450 threshold value applies to both directions.
451 The raw or input element of the name indicates whether the
452 value is in raw device units or in processed units (as _raw
453 and _input do on sysfs direct channel read attributes).
454
455What: /sys/.../deviceX:eventY/accel_x_raw_roc_rising_value
456What: /sys/.../deviceX:eventY/accel_x_raw_roc_falling_value
457What: /sys/.../deviceX:eventY/accel_y_raw_roc_rising_value
458What: /sys/.../deviceX:eventY/accel_y_raw_roc_falling_value
459What: /sys/.../deviceX:eventY/accel_z_raw_roc_rising_value
460What: /sys/.../deviceX:eventY/accel_z_raw_roc_falling_value
461What: /sys/.../deviceX:eventY/gyro_x_raw_roc_rising_value
462What: /sys/.../deviceX:eventY/gyro_x_raw_roc_falling_value
463What: /sys/.../deviceX:eventY/gyro_y_raw_roc_rising_value
464What: /sys/.../deviceX:eventY/gyro_y_raw_roc_falling_value
465What: /sys/.../deviceX:eventY/gyro_z_raw_roc_rising_value
466What: /sys/.../deviceX:eventY/gyro_z_raw_roc_falling_value
467What: /sys/.../deviceX:eventY/magn_x_raw_roc_rising_value
468What: /sys/.../deviceX:eventY/magn_x_raw_roc_falling_value
469What: /sys/.../deviceX:eventY/magn_y_raw_roc_rising_value
470What: /sys/.../deviceX:eventY/magn_y_raw_roc_falling_value
471What: /sys/.../deviceX:eventY/magn_z_raw_roc_rising_value
472What: /sys/.../deviceX:eventY/magn_z_raw_roc_falling_value
473What: /sys/.../deviceX:eventY/inZ_supply_raw_roc_rising_value
474What: /sys/.../deviceX:eventY/inZ_supply_raw_roc_falling_value
475What: /sys/.../deviceX:eventY/inZ_raw_roc_falling_value
476What: /sys/.../deviceX:eventY/inZ_raw_roc_falling_value
477What: /sys/.../deviceX:eventY/temp_raw_roc_falling_value
478What: /sys/.../deviceX:eventY/temp_raw_roc_falling_value
479KernelVersion: 2.6.37
480Contact: linux-iio@vger.kernel.org
481Description:
482 Specifies the value of rate of change threshold that the
483 device is comparing against for the events enabled by
484 <type>[Z][_name]_roc[_rising|falling]_en.
485 If separate attributes exist for the two directions,
486 but direction is not specified for this attribute,
487 then a single threshold value applies to both directions.
488 The raw or input element of the name indicates whether the
489 value is in raw device units or in processed units (as _raw
490 and _input do on sysfs direct channel read attributes).
491
492What: /sys/.../deviceX:eventY/accel_x_thresh_rising_period
493What: /sys/.../deviceX:eventY/accel_x_thresh_falling_period
494hat: /sys/.../deviceX:eventY/accel_x_roc_rising_period
495What: /sys/.../deviceX:eventY/accel_x_roc_falling_period
496What: /sys/.../deviceX:eventY/accel_y_thresh_rising_period
497What: /sys/.../deviceX:eventY/accel_y_thresh_falling_period
498What: /sys/.../deviceX:eventY/accel_y_roc_rising_period
499What: /sys/.../deviceX:eventY/accel_y_roc_falling_period
500What: /sys/.../deviceX:eventY/accel_z_thresh_rising_period
501What: /sys/.../deviceX:eventY/accel_z_thresh_falling_period
502What: /sys/.../deviceX:eventY/accel_z_roc_rising_period
503What: /sys/.../deviceX:eventY/accel_z_roc_falling_period
504What: /sys/.../deviceX:eventY/gyro_x_thresh_rising_period
505What: /sys/.../deviceX:eventY/gyro_x_thresh_falling_period
506What: /sys/.../deviceX:eventY/gyro_x_roc_rising_period
507What: /sys/.../deviceX:eventY/gyro_x_roc_falling_period
508What: /sys/.../deviceX:eventY/gyro_y_thresh_rising_period
509What: /sys/.../deviceX:eventY/gyro_y_thresh_falling_period
510What: /sys/.../deviceX:eventY/gyro_y_roc_rising_period
511What: /sys/.../deviceX:eventY/gyro_y_roc_falling_period
512What: /sys/.../deviceX:eventY/gyro_z_thresh_rising_period
513What: /sys/.../deviceX:eventY/gyro_z_thresh_falling_period
514What: /sys/.../deviceX:eventY/gyro_z_roc_rising_period
515What: /sys/.../deviceX:eventY/gyro_z_roc_falling_period
516What: /sys/.../deviceX:eventY/magn_x_thresh_rising_period
517What: /sys/.../deviceX:eventY/magn_x_thresh_falling_period
518What: /sys/.../deviceX:eventY/magn_x_roc_rising_period
519What: /sys/.../deviceX:eventY/magn_x_roc_falling_period
520What: /sys/.../deviceX:eventY/magn_y_thresh_rising_period
521What: /sys/.../deviceX:eventY/magn_y_thresh_falling_period
522What: /sys/.../deviceX:eventY/magn_y_roc_rising_period
523What: /sys/.../deviceX:eventY/magn_y_roc_falling_period
524What: /sys/.../deviceX:eventY/magn_z_thresh_rising_period
525What: /sys/.../deviceX:eventY/magn_z_thresh_falling_period
526What: /sys/.../deviceX:eventY/magn_z_roc_rising_period
527What: /sys/.../deviceX:eventY/magn_z_roc_falling_period
528What: /sys/.../deviceX:eventY/inZ_supply_thresh_rising_period
529What: /sys/.../deviceX:eventY/inZ_supply_thresh_falling_period
530What: /sys/.../deviceX:eventY/inz_supply_roc_rising_period
531What: /sys/.../deviceX:eventY/inZ_supply_roc_falling_period
532What: /sys/.../deviceX:eventY/inZ_thresh_rising_period
533What: /sys/.../deviceX:eventY/inZ_thresh_falling_period
534What: /sys/.../deviceX:eventY/inZ_roc_rising_period
535What: /sys/.../deviceX:eventY/inZ_roc_falling_period
536What: /sys/.../deviceX:eventY/temp_thresh_rising_period
537What: /sys/.../deviceX:eventY/temp_thresh_falling_period
538What: /sys/.../deviceX:eventY/temp_roc_rising_period
539What: /sys/.../deviceX:eventY/temp_roc_falling_period
540What: /sys/.../deviceX:eventY/accel_x&y&z_mag_falling_period
541KernelVersion: 2.6.37
542Contact: linux-iio@vger.kernel.org
543Description:
544 Period of time (in seconds) for which the condition must be
545 met before an event is generated. If direction is not
546 specified then this period applies to both directions.
547
548What: /sys/.../deviceX:eventY/accel_mag_en
549What: /sys/.../deviceX:eventY/accel_mag_rising_en
550What: /sys/.../deviceX:eventY/accel_mag_falling_en
551What: /sys/.../deviceX:eventY/accel_x_mag_en
552What: /sys/.../deviceX:eventY/accel_x_mag_rising_en
553What: /sys/.../deviceX:eventY/accel_x_mag_falling_en
554What: /sys/.../deviceX:eventY/accel_y_mag_en
555What: /sys/.../deviceX:eventY/accel_y_mag_rising_en
556What: /sys/.../deviceX:eventY/accel_y_mag_falling_en
557What: /sys/.../deviceX:eventY/accel_z_mag_en
558What: /sys/.../deviceX:eventY/accel_z_mag_rising_en
559What: /sys/.../deviceX:eventY/accel_z_mag_falling_en
560What: /sys/.../deviceX:eventY/accel_x&y&z_mag_rising_en
561What: /sys/.../deviceX:eventY/accel_x&y&z_mag_falling_en
562KernelVersion: 2.6.37
563Contact: linux-iio@vger.kernel.org
564Description:
565 Similar to accel_x_thresh[_rising|_falling]_en, but here the
566 magnitude of the channel is compared to the threshold, not its
567 signed value.
568
569What: /sys/.../accel_raw_mag_value
570What: /sys/.../accel_x_raw_mag_rising_value
571What: /sys/.../accel_y_raw_mag_rising_value
572What: /sys/.../accel_z_raw_mag_rising_value
573KernelVersion: 2.6.37
574Contact: linux-iio@vger.kernel.org
575Description:
576 The value to which the magnitude of the channel is compared. If
577 number or direction is not specified, applies to all channels of
578 this type.
579
580What: /sys/bus/iio/devices/deviceX:buffer:event/dev
581KernelVersion: 2.6.35
582Contact: linux-iio@vger.kernel.org
583Description:
584 Buffer for device X event character device major:minor numbers.
585
586What: /sys/bus/iio/devices/deviceX:buffer:access/dev
587KernelVersion: 2.6.35
588Contact: linux-iio@vger.kernel.org
589Description:
590 Buffer for device X access character device major:minor numbers.
591
592What: /sys/bus/iio/devices/deviceX:buffer/trigger
593KernelVersion: 2.6.35
594Contact: linux-iio@vger.kernel.org
595Description:
596 The name of the trigger source being used, as per string given
597 in /sys/class/iio/triggerY/name.
598
599What: /sys/bus/iio/devices/deviceX:buffer/length
600KernelVersion: 2.6.35
601Contact: linux-iio@vger.kernel.org
602Description:
603 Number of scans contained by the buffer.
604
605What: /sys/bus/iio/devices/deviceX:buffer/bytes_per_datum
606KernelVersion: 2.6.37
607Contact: linux-iio@vger.kernel.org
608Description:
609 Bytes per scan. Due to alignment fun, the scan may be larger
610 than implied directly by the scan_element parameters.
611
612What: /sys/bus/iio/devices/deviceX:buffer/enable
613KernelVersion: 2.6.35
614Contact: linux-iio@vger.kernel.org
615Description:
616 Actually start the buffer capture up. Will start trigger
617 if first device and appropriate.
618
619What: /sys/bus/iio/devices/deviceX:buffer/scan_elements
620KernelVersion: 2.6.37
621Contact: linux-iio@vger.kernel.org
622Description:
623 Directory containing interfaces for elements that will be
624 captured for a single triggered sample set in the buffer.
625
626What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_x_en
627What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_y_en
628What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_z_en
629What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_x_en
630What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_y_en
631What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_z_en
632What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_x_en
633What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_y_en
634What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_z_en
635What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/timestamp_en
636What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_supply_en
637What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_en
638What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY-inZ_en
639What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_x_en
640What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_y_en
641KernelVersion: 2.6.37
642Contact: linux-iio@vger.kernel.org
643Description:
644 Scan element control for triggered data capture.
645
646What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_type
647What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_type
648What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_type
649What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_type
650What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_type
651What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/in-in_type
652What: /sys/.../deviceX:buffer/scan_elements/inY_supply_type
653What: /sys/.../deviceX:buffer/scan_elements/timestamp_type
654KernelVersion: 2.6.37
655Contact: linux-iio@vger.kernel.org
656Description:
657 Description of the scan element data storage within the buffer
658 and hence the form in which it is read from user-space.
659 Form is [s|u]bits/storagebits[>>shift]. s or u specifies if
660 signed (2's complement) or unsigned. bits is the number of bits
661 of data and storagebits is the space (after padding) that it
662 occupies in the buffer. shift if specified, is the shift that
663 needs to be applied prior to masking out unused bits. Some
664 devices put their data in the middle of the transferred elements
665 with additional information on both sides. Note that some
666 devices will have additional information in the unused bits
667 so to get a clean value, the bits value must be used to mask
668 the buffer output value appropriately. The storagebits value
669 also specifies the data alignment. So s48/64>>2 will be a
670 signed 48 bit integer stored in a 64 bit location aligned to
671 a a64 bit boundary. To obtain the clean value, shift right 2
672 and apply a mask to zero the top 16 bits of the result.
673 For other storage combinations this attribute will be extended
674 appropriately.
675
676What: /sys/.../deviceX:buffer/scan_elements/accel_type_available
677KernelVersion: 2.6.37
678Contact: linux-iio@vger.kernel.org
679Description:
680 If the type parameter can take one of a small set of values,
681 this attribute lists them.
682
683What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_index
684What: /sys/.../deviceX:buffer/scan_elements/inY_supply_index
685What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_x_index
686What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_y_index
687What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_z_index
688What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_x_index
689What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_y_index
690What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_z_index
691What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_x_index
692What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_y_index
693What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_z_index
694What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_x_index
695What: /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_y_index
696What: /sys/.../deviceX:buffer/scan_elements/timestamp_index
697KernelVersion: 2.6.37
698Contact: linux-iio@vger.kernel.org
699Description:
700 A single positive integer specifying the position of this
701 scan element in the buffer. Note these are not dependent on
702 what is enabled and may not be contiguous. Thus for user-space
703 to establish the full layout these must be used in conjunction
704 with all _en attributes to establish which channels are present,
705 and the relevant _type attributes to establish the data storage
706 format.
707
708What: /sys/bus/iio/devices/deviceX/gyro_z_quadrature_correction_raw
709KernelVersion: 2.6.38
710Contact: linux-iio@xxxxxxxxxxxxxxx
711Description:
712 This attribute is used to read the amount of quadrature error
713 present in the device at a given time.
diff --git a/drivers/staging/iio/accel/accel.h b/drivers/staging/iio/accel/accel.h
new file mode 100644
index 00000000000..50651f835ce
--- /dev/null
+++ b/drivers/staging/iio/accel/accel.h
@@ -0,0 +1,87 @@
1
2#include "../sysfs.h"
3
4/* Accelerometer types of attribute */
5#define IIO_DEV_ATTR_ACCEL_OFFSET(_mode, _show, _store, _addr) \
6 IIO_DEVICE_ATTR(accel_offset, _mode, _show, _store, _addr)
7
8#define IIO_DEV_ATTR_ACCEL_X_OFFSET(_mode, _show, _store, _addr) \
9 IIO_DEVICE_ATTR(accel_x_offset, _mode, _show, _store, _addr)
10
11#define IIO_DEV_ATTR_ACCEL_Y_OFFSET(_mode, _show, _store, _addr) \
12 IIO_DEVICE_ATTR(accel_y_offset, _mode, _show, _store, _addr)
13
14#define IIO_DEV_ATTR_ACCEL_Z_OFFSET(_mode, _show, _store, _addr) \
15 IIO_DEVICE_ATTR(accel_z_offset, _mode, _show, _store, _addr)
16
17#define IIO_CONST_ATTR_ACCEL_SCALE(_string) \
18 IIO_CONST_ATTR(accel_scale, _string)
19
20#define IIO_DEV_ATTR_ACCEL_SCALE(_mode, _show, _store, _addr) \
21 IIO_DEVICE_ATTR(accel_scale, _mode, _show, _store, _addr)
22
23#define IIO_DEV_ATTR_ACCEL_X_SCALE(_mode, _show, _store, _addr) \
24 IIO_DEVICE_ATTR(accel_x_scale, _mode, _show, _store, _addr)
25
26#define IIO_DEV_ATTR_ACCEL_Y_SCALE(_mode, _show, _store, _addr) \
27 IIO_DEVICE_ATTR(accel_y_scale, _mode, _show, _store, _addr)
28
29#define IIO_DEV_ATTR_ACCEL_Z_SCALE(_mode, _show, _store, _addr) \
30 IIO_DEVICE_ATTR(accel_z_scale, _mode, _show, _store, _addr)
31
32#define IIO_DEV_ATTR_ACCEL_CALIBBIAS(_mode, _show, _store, _addr) \
33 IIO_DEVICE_ATTR(accel_calibbias, _mode, _show, _store, _addr)
34
35#define IIO_DEV_ATTR_ACCEL_X_CALIBBIAS(_mode, _show, _store, _addr) \
36 IIO_DEVICE_ATTR(accel_x_calibbias, _mode, _show, _store, _addr)
37
38#define IIO_DEV_ATTR_ACCEL_Y_CALIBBIAS(_mode, _show, _store, _addr) \
39 IIO_DEVICE_ATTR(accel_y_calibbias, _mode, _show, _store, _addr)
40
41#define IIO_DEV_ATTR_ACCEL_Z_CALIBBIAS(_mode, _show, _store, _addr) \
42 IIO_DEVICE_ATTR(accel_z_calibbias, _mode, _show, _store, _addr)
43
44#define IIO_DEV_ATTR_ACCEL_CALIBSCALE(_mode, _show, _store, _addr) \
45 IIO_DEVICE_ATTR(accel_calibscale, _mode, _show, _store, _addr)
46
47#define IIO_DEV_ATTR_ACCEL_X_CALIBSCALE(_mode, _show, _store, _addr) \
48 IIO_DEVICE_ATTR(accel_x_calibscale, _mode, _show, _store, _addr)
49
50#define IIO_DEV_ATTR_ACCEL_Y_CALIBSCALE(_mode, _show, _store, _addr) \
51 IIO_DEVICE_ATTR(accel_y_calibscale, _mode, _show, _store, _addr)
52
53#define IIO_DEV_ATTR_ACCEL_Z_CALIBSCALE(_mode, _show, _store, _addr) \
54 IIO_DEVICE_ATTR(accel_z_calibscale, _mode, _show, _store, _addr)
55
56#define IIO_DEV_ATTR_ACCEL(_show, _addr) \
57 IIO_DEVICE_ATTR(accel_raw, S_IRUGO, _show, NULL, _addr)
58
59#define IIO_DEV_ATTR_ACCEL_X(_show, _addr) \
60 IIO_DEVICE_ATTR(accel_x_raw, S_IRUGO, _show, NULL, _addr)
61
62#define IIO_DEV_ATTR_ACCEL_Y(_show, _addr) \
63 IIO_DEVICE_ATTR(accel_y_raw, S_IRUGO, _show, NULL, _addr)
64
65#define IIO_DEV_ATTR_ACCEL_Z(_show, _addr) \
66 IIO_DEVICE_ATTR(accel_z_raw, S_IRUGO, _show, NULL, _addr)
67
68#define IIO_DEV_ATTR_ACCEL_XY(_show, _addr) \
69 IIO_DEVICE_ATTR(accel_xy, S_IRUGO, _show, NULL, _addr)
70
71#define IIO_DEV_ATTR_ACCEL_PEAK(_show, _addr) \
72 IIO_DEVICE_ATTR(accel_peak, S_IRUGO, _show, NULL, _addr)
73
74#define IIO_DEV_ATTR_ACCEL_XPEAK(_show, _addr) \
75 IIO_DEVICE_ATTR(accel_xpeak, S_IRUGO, _show, NULL, _addr)
76
77#define IIO_DEV_ATTR_ACCEL_YPEAK(_show, _addr) \
78 IIO_DEVICE_ATTR(accel_ypeak, S_IRUGO, _show, NULL, _addr)
79
80#define IIO_DEV_ATTR_ACCEL_ZPEAK(_show, _addr) \
81 IIO_DEVICE_ATTR(accel_zpeak, S_IRUGO, _show, NULL, _addr)
82
83#define IIO_DEV_ATTR_ACCEL_XYPEAK(_show, _addr) \
84 IIO_DEVICE_ATTR(accel_xypeak, S_IRUGO, _show, NULL, _addr)
85
86#define IIO_DEV_ATTR_ACCEL_XYZPEAK(_show, _addr) \
87 IIO_DEVICE_ATTR(accel_xyzpeak, S_IRUGO, _show, NULL, _addr)
diff --git a/drivers/staging/iio/accel/adis16201_ring.c b/drivers/staging/iio/accel/adis16201_ring.c
new file mode 100644
index 00000000000..66e708ddf8b
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16201_ring.c
@@ -0,0 +1,152 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/mutex.h>
4#include <linux/device.h>
5#include <linux/kernel.h>
6#include <linux/spi/spi.h>
7#include <linux/slab.h>
8#include <linux/sysfs.h>
9
10#include "../iio.h"
11#include "../sysfs.h"
12#include "../ring_sw.h"
13#include "accel.h"
14#include "../trigger.h"
15#include "adis16201.h"
16
17
18/**
19 * adis16201_read_ring_data() read data registers which will be placed into ring
20 * @dev: device associated with child of actual device (iio_dev or iio_trig)
21 * @rx: somewhere to pass back the value read
22 **/
23static int adis16201_read_ring_data(struct iio_dev *indio_dev, u8 *rx)
24{
25 struct spi_message msg;
26 struct adis16201_state *st = iio_priv(indio_dev);
27 struct spi_transfer xfers[ADIS16201_OUTPUTS + 1];
28 int ret;
29 int i;
30
31 mutex_lock(&st->buf_lock);
32
33 spi_message_init(&msg);
34
35 memset(xfers, 0, sizeof(xfers));
36 for (i = 0; i <= ADIS16201_OUTPUTS; i++) {
37 xfers[i].bits_per_word = 8;
38 xfers[i].cs_change = 1;
39 xfers[i].len = 2;
40 xfers[i].delay_usecs = 20;
41 xfers[i].tx_buf = st->tx + 2 * i;
42 st->tx[2 * i] = ADIS16201_READ_REG(ADIS16201_SUPPLY_OUT +
43 2 * i);
44 st->tx[2 * i + 1] = 0;
45 if (i >= 1)
46 xfers[i].rx_buf = rx + 2 * (i - 1);
47 spi_message_add_tail(&xfers[i], &msg);
48 }
49
50 ret = spi_sync(st->us, &msg);
51 if (ret)
52 dev_err(&st->us->dev, "problem when burst reading");
53
54 mutex_unlock(&st->buf_lock);
55
56 return ret;
57}
58
59/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
60 * specific to be rolled into the core.
61 */
62static irqreturn_t adis16201_trigger_handler(int irq, void *p)
63{
64 struct iio_poll_func *pf = p;
65 struct iio_dev *indio_dev = pf->private_data;
66 struct adis16201_state *st = iio_priv(indio_dev);
67 struct iio_ring_buffer *ring = indio_dev->ring;
68
69 int i = 0;
70 s16 *data;
71 size_t datasize = ring->access->get_bytes_per_datum(ring);
72
73 data = kmalloc(datasize, GFP_KERNEL);
74 if (data == NULL) {
75 dev_err(&st->us->dev, "memory alloc failed in ring bh");
76 return -ENOMEM;
77 }
78
79 if (ring->scan_count)
80 if (adis16201_read_ring_data(indio_dev, st->rx) >= 0)
81 for (; i < ring->scan_count; i++)
82 data[i] = be16_to_cpup(
83 (__be16 *)&(st->rx[i*2]));
84
85 /* Guaranteed to be aligned with 8 byte boundary */
86 if (ring->scan_timestamp)
87 *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
88
89 ring->access->store_to(ring, (u8 *)data, pf->timestamp);
90
91 iio_trigger_notify_done(indio_dev->trig);
92 kfree(data);
93
94 return IRQ_HANDLED;
95}
96
97void adis16201_unconfigure_ring(struct iio_dev *indio_dev)
98{
99 iio_dealloc_pollfunc(indio_dev->pollfunc);
100 iio_sw_rb_free(indio_dev->ring);
101}
102
103static const struct iio_ring_setup_ops adis16201_ring_setup_ops = {
104 .preenable = &iio_sw_ring_preenable,
105 .postenable = &iio_triggered_ring_postenable,
106 .predisable = &iio_triggered_ring_predisable,
107};
108
109int adis16201_configure_ring(struct iio_dev *indio_dev)
110{
111 int ret = 0;
112 struct iio_ring_buffer *ring;
113
114 ring = iio_sw_rb_allocate(indio_dev);
115 if (!ring) {
116 ret = -ENOMEM;
117 return ret;
118 }
119 indio_dev->ring = ring;
120 /* Effectively select the ring buffer implementation */
121 ring->bpe = 2;
122 ring->scan_timestamp = true;
123 ring->access = &ring_sw_access_funcs;
124 ring->setup_ops = &adis16201_ring_setup_ops;
125 ring->owner = THIS_MODULE;
126
127 /* Set default scan mode */
128 iio_scan_mask_set(ring, ADIS16201_SCAN_SUPPLY);
129 iio_scan_mask_set(ring, ADIS16201_SCAN_ACC_X);
130 iio_scan_mask_set(ring, ADIS16201_SCAN_ACC_Y);
131 iio_scan_mask_set(ring, ADIS16201_SCAN_AUX_ADC);
132 iio_scan_mask_set(ring, ADIS16201_SCAN_TEMP);
133 iio_scan_mask_set(ring, ADIS16201_SCAN_INCLI_X);
134 iio_scan_mask_set(ring, ADIS16201_SCAN_INCLI_Y);
135
136 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
137 &adis16201_trigger_handler,
138 IRQF_ONESHOT,
139 indio_dev,
140 "adis16201_consumer%d",
141 indio_dev->id);
142 if (indio_dev->pollfunc == NULL) {
143 ret = -ENOMEM;
144 goto error_iio_sw_rb_free;
145 }
146
147 indio_dev->modes |= INDIO_RING_TRIGGERED;
148 return 0;
149error_iio_sw_rb_free:
150 iio_sw_rb_free(indio_dev->ring);
151 return ret;
152}
diff --git a/drivers/staging/iio/accel/adis16201_trigger.c b/drivers/staging/iio/accel/adis16201_trigger.c
new file mode 100644
index 00000000000..3a95c083b45
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16201_trigger.c
@@ -0,0 +1,71 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/mutex.h>
4#include <linux/device.h>
5#include <linux/kernel.h>
6#include <linux/sysfs.h>
7#include <linux/spi/spi.h>
8
9#include "../iio.h"
10#include "../sysfs.h"
11#include "../trigger.h"
12#include "adis16201.h"
13
14/**
15 * adis16201_data_rdy_trigger_set_state() set datardy interrupt state
16 **/
17static int adis16201_data_rdy_trigger_set_state(struct iio_trigger *trig,
18 bool state)
19{
20 struct iio_dev *indio_dev = trig->private_data;
21
22 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
23 return adis16201_set_irq(indio_dev, state);
24}
25
26int adis16201_probe_trigger(struct iio_dev *indio_dev)
27{
28 int ret;
29 struct adis16201_state *st = iio_priv(indio_dev);
30
31 st->trig = iio_allocate_trigger("adis16201-dev%d", indio_dev->id);
32 if (st->trig == NULL) {
33 ret = -ENOMEM;
34 goto error_ret;
35 }
36 ret = request_irq(st->us->irq,
37 &iio_trigger_generic_data_rdy_poll,
38 IRQF_TRIGGER_RISING,
39 "adis16201",
40 st->trig);
41 if (ret)
42 goto error_free_trig;
43 st->trig->dev.parent = &st->us->dev;
44 st->trig->owner = THIS_MODULE;
45 st->trig->private_data = indio_dev;
46 st->trig->set_trigger_state = &adis16201_data_rdy_trigger_set_state;
47 ret = iio_trigger_register(st->trig);
48
49 /* select default trigger */
50 indio_dev->trig = st->trig;
51 if (ret)
52 goto error_free_irq;
53
54 return 0;
55
56error_free_irq:
57 free_irq(st->us->irq, st->trig);
58error_free_trig:
59 iio_free_trigger(st->trig);
60error_ret:
61 return ret;
62}
63
64void adis16201_remove_trigger(struct iio_dev *indio_dev)
65{
66 struct adis16201_state *state = iio_priv(indio_dev);
67
68 iio_trigger_unregister(state->trig);
69 free_irq(state->us->irq, state->trig);
70 iio_free_trigger(state->trig);
71}
diff --git a/drivers/staging/iio/accel/adis16203_ring.c b/drivers/staging/iio/accel/adis16203_ring.c
new file mode 100644
index 00000000000..d2c07c52746
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16203_ring.c
@@ -0,0 +1,158 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/gpio.h>
4#include <linux/workqueue.h>
5#include <linux/mutex.h>
6#include <linux/device.h>
7#include <linux/kernel.h>
8#include <linux/spi/spi.h>
9#include <linux/slab.h>
10#include <linux/sysfs.h>
11#include <linux/list.h>
12
13#include "../iio.h"
14#include "../sysfs.h"
15#include "../ring_sw.h"
16#include "accel.h"
17#include "../trigger.h"
18#include "adis16203.h"
19
20/**
21 * adis16203_read_ring_data() read data registers which will be placed into ring
22 * @dev: device associated with child of actual device (iio_dev or iio_trig)
23 * @rx: somewhere to pass back the value read
24 **/
25static int adis16203_read_ring_data(struct device *dev, u8 *rx)
26{
27 struct spi_message msg;
28 struct iio_dev *indio_dev = dev_get_drvdata(dev);
29 struct adis16203_state *st = iio_priv(indio_dev);
30 struct spi_transfer xfers[ADIS16203_OUTPUTS + 1];
31 int ret;
32 int i;
33
34 mutex_lock(&st->buf_lock);
35
36 spi_message_init(&msg);
37
38 memset(xfers, 0, sizeof(xfers));
39 for (i = 0; i <= ADIS16203_OUTPUTS; i++) {
40 xfers[i].bits_per_word = 8;
41 xfers[i].cs_change = 1;
42 xfers[i].len = 2;
43 xfers[i].delay_usecs = 20;
44 xfers[i].tx_buf = st->tx + 2 * i;
45 if (i < 1) /* SUPPLY_OUT: 0x02, AUX_ADC: 0x08 */
46 st->tx[2 * i] = ADIS16203_READ_REG(ADIS16203_SUPPLY_OUT + 2 * i);
47 else
48 st->tx[2 * i] = ADIS16203_READ_REG(ADIS16203_SUPPLY_OUT + 2 * i + 6);
49 st->tx[2 * i + 1] = 0;
50 if (i >= 1)
51 xfers[i].rx_buf = rx + 2 * (i - 1);
52 spi_message_add_tail(&xfers[i], &msg);
53 }
54
55 ret = spi_sync(st->us, &msg);
56 if (ret)
57 dev_err(&st->us->dev, "problem when burst reading");
58
59 mutex_unlock(&st->buf_lock);
60
61 return ret;
62}
63
64/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
65 * specific to be rolled into the core.
66 */
67static irqreturn_t adis16203_trigger_handler(int irq, void *p)
68{
69 struct iio_poll_func *pf = p;
70 struct iio_dev *indio_dev = pf->private_data;
71 struct adis16203_state *st = iio_priv(indio_dev);
72 struct iio_ring_buffer *ring = indio_dev->ring;
73
74 int i = 0;
75 s16 *data;
76 size_t datasize = ring->access->get_bytes_per_datum(ring);
77
78 data = kmalloc(datasize, GFP_KERNEL);
79 if (data == NULL) {
80 dev_err(&st->us->dev, "memory alloc failed in ring bh");
81 return -ENOMEM;
82 }
83
84 if (ring->scan_count)
85 if (adis16203_read_ring_data(&indio_dev->dev, st->rx) >= 0)
86 for (; i < ring->scan_count; i++)
87 data[i] = be16_to_cpup(
88 (__be16 *)&(st->rx[i*2]));
89
90 /* Guaranteed to be aligned with 8 byte boundary */
91 if (ring->scan_timestamp)
92 *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
93
94 ring->access->store_to(ring,
95 (u8 *)data,
96 pf->timestamp);
97
98 iio_trigger_notify_done(indio_dev->trig);
99 kfree(data);
100
101 return IRQ_HANDLED;
102}
103
104void adis16203_unconfigure_ring(struct iio_dev *indio_dev)
105{
106 iio_dealloc_pollfunc(indio_dev->pollfunc);
107 iio_sw_rb_free(indio_dev->ring);
108}
109
110static const struct iio_ring_setup_ops adis16203_ring_setup_ops = {
111 .preenable = &iio_sw_ring_preenable,
112 .postenable = &iio_triggered_ring_postenable,
113 .predisable = &iio_triggered_ring_predisable,
114};
115
116int adis16203_configure_ring(struct iio_dev *indio_dev)
117{
118 int ret = 0;
119 struct iio_ring_buffer *ring;
120
121 ring = iio_sw_rb_allocate(indio_dev);
122 if (!ring) {
123 ret = -ENOMEM;
124 return ret;
125 }
126 indio_dev->ring = ring;
127 /* Effectively select the ring buffer implementation */
128 ring->bpe = 2;
129 ring->scan_timestamp = true;
130 ring->access = &ring_sw_access_funcs;
131 ring->setup_ops = &adis16203_ring_setup_ops;
132 ring->owner = THIS_MODULE;
133
134 /* Set default scan mode */
135 iio_scan_mask_set(ring, ADIS16203_SCAN_SUPPLY);
136 iio_scan_mask_set(ring, ADIS16203_SCAN_TEMP);
137 iio_scan_mask_set(ring, ADIS16203_SCAN_AUX_ADC);
138 iio_scan_mask_set(ring, ADIS16203_SCAN_INCLI_X);
139 iio_scan_mask_set(ring, ADIS16203_SCAN_INCLI_Y);
140
141 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
142 &adis16203_trigger_handler,
143 IRQF_ONESHOT,
144 indio_dev,
145 "adis16203_consumer%d",
146 indio_dev->id);
147 if (indio_dev->pollfunc == NULL) {
148 ret = -ENOMEM;
149 goto error_iio_sw_rb_free;
150 }
151
152 indio_dev->modes |= INDIO_RING_TRIGGERED;
153 return 0;
154
155error_iio_sw_rb_free:
156 iio_sw_rb_free(indio_dev->ring);
157 return ret;
158}
diff --git a/drivers/staging/iio/accel/adis16203_trigger.c b/drivers/staging/iio/accel/adis16203_trigger.c
new file mode 100644
index 00000000000..3caf3e8bc9d
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16203_trigger.c
@@ -0,0 +1,74 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/mutex.h>
4#include <linux/device.h>
5#include <linux/kernel.h>
6#include <linux/sysfs.h>
7#include <linux/list.h>
8#include <linux/spi/spi.h>
9
10#include "../iio.h"
11#include "../sysfs.h"
12#include "../trigger.h"
13#include "adis16203.h"
14
15/**
16 * adis16203_data_rdy_trigger_set_state() set datardy interrupt state
17 **/
18static int adis16203_data_rdy_trigger_set_state(struct iio_trigger *trig,
19 bool state)
20{
21 struct iio_dev *indio_dev = trig->private_data;
22
23 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
24 return adis16203_set_irq(indio_dev, state);
25}
26
27int adis16203_probe_trigger(struct iio_dev *indio_dev)
28{
29 int ret;
30 struct adis16203_state *st = iio_priv(indio_dev);
31
32 st->trig = iio_allocate_trigger("adis16203-dev%d", indio_dev->id);
33 if (st->trig == NULL) {
34 ret = -ENOMEM;
35 goto error_ret;
36 }
37
38 ret = request_irq(st->us->irq,
39 &iio_trigger_generic_data_rdy_poll,
40 IRQF_TRIGGER_RISING,
41 "adis16203",
42 st->trig);
43 if (ret)
44 goto error_free_trig;
45
46 st->trig->dev.parent = &st->us->dev;
47 st->trig->owner = THIS_MODULE;
48 st->trig->private_data = indio_dev;
49 st->trig->set_trigger_state = &adis16203_data_rdy_trigger_set_state;
50 ret = iio_trigger_register(st->trig);
51
52 /* select default trigger */
53 indio_dev->trig = st->trig;
54 if (ret)
55 goto error_free_irq;
56
57 return 0;
58
59error_free_irq:
60 free_irq(st->us->irq, st->trig);
61error_free_trig:
62 iio_free_trigger(st->trig);
63error_ret:
64 return ret;
65}
66
67void adis16203_remove_trigger(struct iio_dev *indio_dev)
68{
69 struct adis16203_state *st = iio_priv(indio_dev);
70
71 iio_trigger_unregister(st->trig);
72 free_irq(st->us->irq, st->trig);
73 iio_free_trigger(st->trig);
74}
diff --git a/drivers/staging/iio/accel/adis16204_ring.c b/drivers/staging/iio/accel/adis16204_ring.c
new file mode 100644
index 00000000000..852df06684d
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16204_ring.c
@@ -0,0 +1,154 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/gpio.h>
4#include <linux/workqueue.h>
5#include <linux/mutex.h>
6#include <linux/device.h>
7#include <linux/kernel.h>
8#include <linux/spi/spi.h>
9#include <linux/slab.h>
10#include <linux/sysfs.h>
11#include <linux/list.h>
12
13#include "../iio.h"
14#include "../sysfs.h"
15#include "../ring_sw.h"
16#include "accel.h"
17#include "../trigger.h"
18#include "adis16204.h"
19
20/**
21 * adis16204_read_ring_data() read data registers which will be placed into ring
22 * @dev: device associated with child of actual device (iio_dev or iio_trig)
23 * @rx: somewhere to pass back the value read
24 **/
25static int adis16204_read_ring_data(struct device *dev, u8 *rx)
26{
27 struct spi_message msg;
28 struct iio_dev *indio_dev = dev_get_drvdata(dev);
29 struct adis16204_state *st = iio_priv(indio_dev);
30 struct spi_transfer xfers[ADIS16204_OUTPUTS + 1];
31 int ret;
32 int i;
33
34 mutex_lock(&st->buf_lock);
35
36 spi_message_init(&msg);
37
38 memset(xfers, 0, sizeof(xfers));
39 for (i = 0; i <= ADIS16204_OUTPUTS; i++) {
40 xfers[i].bits_per_word = 8;
41 xfers[i].cs_change = 1;
42 xfers[i].len = 2;
43 xfers[i].delay_usecs = 20;
44 xfers[i].tx_buf = st->tx + 2 * i;
45 st->tx[2 * i]
46 = ADIS16204_READ_REG(ADIS16204_SUPPLY_OUT + 2 * i);
47 st->tx[2 * i + 1] = 0;
48 if (i >= 1)
49 xfers[i].rx_buf = rx + 2 * (i - 1);
50 spi_message_add_tail(&xfers[i], &msg);
51 }
52
53 ret = spi_sync(st->us, &msg);
54 if (ret)
55 dev_err(&st->us->dev, "problem when burst reading");
56
57 mutex_unlock(&st->buf_lock);
58
59 return ret;
60}
61
62/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
63 * specific to be rolled into the core.
64 */
65static irqreturn_t adis16204_trigger_handler(int irq, void *p)
66{
67 struct iio_poll_func *pf = p;
68 struct iio_dev *indio_dev = pf->private_data;
69 struct adis16204_state *st = iio_priv(indio_dev);
70 struct iio_ring_buffer *ring = indio_dev->ring;
71 int i = 0;
72 s16 *data;
73 size_t datasize = ring->access->get_bytes_per_datum(ring);
74
75 data = kmalloc(datasize, GFP_KERNEL);
76 if (data == NULL) {
77 dev_err(&st->us->dev, "memory alloc failed in ring bh");
78 return -ENOMEM;
79 }
80
81 if (ring->scan_count)
82 if (adis16204_read_ring_data(&indio_dev->dev, st->rx) >= 0)
83 for (; i < ring->scan_count; i++)
84 data[i] = be16_to_cpup(
85 (__be16 *)&(st->rx[i*2]));
86
87 /* Guaranteed to be aligned with 8 byte boundary */
88 if (ring->scan_timestamp)
89 *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
90
91 ring->access->store_to(ring, (u8 *)data, pf->timestamp);
92
93 iio_trigger_notify_done(indio_dev->trig);
94 kfree(data);
95
96 return IRQ_HANDLED;
97}
98
99void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
100{
101 iio_dealloc_pollfunc(indio_dev->pollfunc);
102 iio_sw_rb_free(indio_dev->ring);
103}
104
105static const struct iio_ring_setup_ops adis16204_ring_setup_ops = {
106 .preenable = &iio_sw_ring_preenable,
107 .postenable = &iio_triggered_ring_postenable,
108 .predisable = &iio_triggered_ring_predisable,
109};
110
111int adis16204_configure_ring(struct iio_dev *indio_dev)
112{
113 int ret = 0;
114 struct iio_ring_buffer *ring;
115
116 ring = iio_sw_rb_allocate(indio_dev);
117 if (!ring) {
118 ret = -ENOMEM;
119 return ret;
120 }
121 indio_dev->ring = ring;
122 /* Effectively select the ring buffer implementation */
123 ring->access = &ring_sw_access_funcs;
124 ring->bpe = 2;
125 ring->scan_timestamp = true;
126 ring->setup_ops = &adis16204_ring_setup_ops;
127 ring->owner = THIS_MODULE;
128
129 /* Set default scan mode */
130 iio_scan_mask_set(ring, ADIS16204_SCAN_SUPPLY);
131 iio_scan_mask_set(ring, ADIS16204_SCAN_ACC_X);
132 iio_scan_mask_set(ring, ADIS16204_SCAN_ACC_Y);
133 iio_scan_mask_set(ring, ADIS16204_SCAN_AUX_ADC);
134 iio_scan_mask_set(ring, ADIS16204_SCAN_TEMP);
135
136 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
137 &adis16204_trigger_handler,
138 IRQF_ONESHOT,
139 indio_dev,
140 "%s_consumer%d",
141 indio_dev->name,
142 indio_dev->id);
143 if (indio_dev->pollfunc == NULL) {
144 ret = -ENOMEM;
145 goto error_iio_sw_rb_free;
146 }
147
148 indio_dev->modes |= INDIO_RING_TRIGGERED;
149 return 0;
150
151error_iio_sw_rb_free:
152 iio_sw_rb_free(indio_dev->ring);
153 return ret;
154}
diff --git a/drivers/staging/iio/accel/adis16204_trigger.c b/drivers/staging/iio/accel/adis16204_trigger.c
new file mode 100644
index 00000000000..01f73b9b888
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16204_trigger.c
@@ -0,0 +1,74 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/mutex.h>
4#include <linux/device.h>
5#include <linux/kernel.h>
6#include <linux/sysfs.h>
7#include <linux/list.h>
8#include <linux/spi/spi.h>
9
10#include "../iio.h"
11#include "../sysfs.h"
12#include "../trigger.h"
13#include "adis16204.h"
14
15/**
16 * adis16204_data_rdy_trigger_set_state() set datardy interrupt state
17 **/
18static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
19 bool state)
20{
21 struct iio_dev *indio_dev = trig->private_data;
22
23 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
24 return adis16204_set_irq(indio_dev, state);
25}
26
27int adis16204_probe_trigger(struct iio_dev *indio_dev)
28{
29 int ret;
30 struct adis16204_state *st = iio_priv(indio_dev);
31
32 st->trig = iio_allocate_trigger("adis16204-dev%d", indio_dev->id);
33 if (st->trig == NULL) {
34 ret = -ENOMEM;
35 goto error_ret;
36 }
37
38 ret = request_irq(st->us->irq,
39 &iio_trigger_generic_data_rdy_poll,
40 IRQF_TRIGGER_RISING,
41 "adis16204",
42 st->trig);
43 if (ret)
44 goto error_free_trig;
45
46 st->trig->dev.parent = &st->us->dev;
47 st->trig->owner = THIS_MODULE;
48 st->trig->private_data = indio_dev;
49 st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;
50 ret = iio_trigger_register(st->trig);
51
52 /* select default trigger */
53 indio_dev->trig = st->trig;
54 if (ret)
55 goto error_free_irq;
56
57 return 0;
58
59error_free_irq:
60 free_irq(st->us->irq, st->trig);
61error_free_trig:
62 iio_free_trigger(st->trig);
63error_ret:
64 return ret;
65}
66
67void adis16204_remove_trigger(struct iio_dev *indio_dev)
68{
69 struct adis16204_state *state = iio_priv(indio_dev);
70
71 iio_trigger_unregister(state->trig);
72 free_irq(state->us->irq, state->trig);
73 iio_free_trigger(state->trig);
74}
diff --git a/drivers/staging/iio/accel/adis16209_ring.c b/drivers/staging/iio/accel/adis16209_ring.c
new file mode 100644
index 00000000000..45017d3f02f
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16209_ring.c
@@ -0,0 +1,157 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/gpio.h>
4#include <linux/workqueue.h>
5#include <linux/mutex.h>
6#include <linux/device.h>
7#include <linux/kernel.h>
8#include <linux/spi/spi.h>
9#include <linux/slab.h>
10#include <linux/sysfs.h>
11#include <linux/list.h>
12
13#include "../iio.h"
14#include "../sysfs.h"
15#include "../ring_sw.h"
16#include "accel.h"
17#include "../trigger.h"
18#include "adis16209.h"
19
20/**
21 * adis16209_read_ring_data() read data registers which will be placed into ring
22 * @dev: device associated with child of actual device (iio_dev or iio_trig)
23 * @rx: somewhere to pass back the value read
24 **/
25static int adis16209_read_ring_data(struct device *dev, u8 *rx)
26{
27 struct spi_message msg;
28 struct iio_dev *indio_dev = dev_get_drvdata(dev);
29 struct adis16209_state *st = iio_priv(indio_dev);
30 struct spi_transfer xfers[ADIS16209_OUTPUTS + 1];
31 int ret;
32 int i;
33
34 mutex_lock(&st->buf_lock);
35
36 spi_message_init(&msg);
37
38 memset(xfers, 0, sizeof(xfers));
39 for (i = 0; i <= ADIS16209_OUTPUTS; i++) {
40 xfers[i].bits_per_word = 8;
41 xfers[i].cs_change = 1;
42 xfers[i].len = 2;
43 xfers[i].delay_usecs = 30;
44 xfers[i].tx_buf = st->tx + 2 * i;
45 st->tx[2 * i]
46 = ADIS16209_READ_REG(ADIS16209_SUPPLY_OUT + 2 * i);
47 st->tx[2 * i + 1] = 0;
48 if (i >= 1)
49 xfers[i].rx_buf = rx + 2 * (i - 1);
50 spi_message_add_tail(&xfers[i], &msg);
51 }
52
53 ret = spi_sync(st->us, &msg);
54 if (ret)
55 dev_err(&st->us->dev, "problem when burst reading");
56
57 mutex_unlock(&st->buf_lock);
58
59 return ret;
60}
61
62/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
63 * specific to be rolled into the core.
64 */
65static irqreturn_t adis16209_trigger_handler(int irq, void *p)
66{
67 struct iio_poll_func *pf = p;
68 struct iio_dev *indio_dev = pf->private_data;
69 struct adis16209_state *st = iio_priv(indio_dev);
70 struct iio_ring_buffer *ring = indio_dev->ring;
71
72 int i = 0;
73 s16 *data;
74 size_t datasize = ring->access->get_bytes_per_datum(ring);
75
76 data = kmalloc(datasize , GFP_KERNEL);
77 if (data == NULL) {
78 dev_err(&st->us->dev, "memory alloc failed in ring bh");
79 return -ENOMEM;
80 }
81
82 if (ring->scan_count &&
83 adis16209_read_ring_data(&indio_dev->dev, st->rx) >= 0)
84 for (; i < ring->scan_count; i++)
85 data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
86
87 /* Guaranteed to be aligned with 8 byte boundary */
88 if (ring->scan_timestamp)
89 *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
90
91 ring->access->store_to(ring, (u8 *)data, pf->timestamp);
92
93 iio_trigger_notify_done(indio_dev->trig);
94 kfree(data);
95
96 return IRQ_HANDLED;
97}
98
99void adis16209_unconfigure_ring(struct iio_dev *indio_dev)
100{
101 iio_dealloc_pollfunc(indio_dev->pollfunc);
102 iio_sw_rb_free(indio_dev->ring);
103}
104
105static const struct iio_ring_setup_ops adis16209_ring_setup_ops = {
106 .preenable = &iio_sw_ring_preenable,
107 .postenable = &iio_triggered_ring_postenable,
108 .predisable = &iio_triggered_ring_predisable,
109};
110
111int adis16209_configure_ring(struct iio_dev *indio_dev)
112{
113 int ret = 0;
114 struct iio_ring_buffer *ring;
115
116 ring = iio_sw_rb_allocate(indio_dev);
117 if (!ring) {
118 ret = -ENOMEM;
119 return ret;
120 }
121 indio_dev->ring = ring;
122 /* Effectively select the ring buffer implementation */
123 ring->access = &ring_sw_access_funcs;
124 ring->bpe = 2;
125 ring->scan_timestamp = true;
126 ring->setup_ops = &adis16209_ring_setup_ops;
127 ring->owner = THIS_MODULE;
128
129 /* Set default scan mode */
130 iio_scan_mask_set(ring, ADIS16209_SCAN_SUPPLY);
131 iio_scan_mask_set(ring, ADIS16209_SCAN_ACC_X);
132 iio_scan_mask_set(ring, ADIS16209_SCAN_ACC_Y);
133 iio_scan_mask_set(ring, ADIS16209_SCAN_AUX_ADC);
134 iio_scan_mask_set(ring, ADIS16209_SCAN_TEMP);
135 iio_scan_mask_set(ring, ADIS16209_SCAN_INCLI_X);
136 iio_scan_mask_set(ring, ADIS16209_SCAN_INCLI_Y);
137 iio_scan_mask_set(ring, ADIS16209_SCAN_ROT);
138
139 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
140 &adis16209_trigger_handler,
141 IRQF_ONESHOT,
142 indio_dev,
143 "%s_consumer%d",
144 indio_dev->name,
145 indio_dev->id);
146 if (indio_dev->pollfunc == NULL) {
147 ret = -ENOMEM;
148 goto error_iio_sw_rb_free;
149 }
150
151 indio_dev->modes |= INDIO_RING_TRIGGERED;
152 return 0;
153
154error_iio_sw_rb_free:
155 iio_sw_rb_free(indio_dev->ring);
156 return ret;
157}
diff --git a/drivers/staging/iio/accel/adis16209_trigger.c b/drivers/staging/iio/accel/adis16209_trigger.c
new file mode 100644
index 00000000000..6df7b47ec7b
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16209_trigger.c
@@ -0,0 +1,82 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/mutex.h>
4#include <linux/device.h>
5#include <linux/kernel.h>
6#include <linux/sysfs.h>
7#include <linux/list.h>
8#include <linux/spi/spi.h>
9
10#include "../iio.h"
11#include "../sysfs.h"
12#include "../trigger.h"
13#include "adis16209.h"
14
15/**
16 * adis16209_data_rdy_trig_poll() the event handler for the data rdy trig
17 **/
18static irqreturn_t adis16209_data_rdy_trig_poll(int irq, void *trig)
19{
20 iio_trigger_poll(trig, iio_get_time_ns());
21 return IRQ_HANDLED;
22}
23
24/**
25 * adis16209_data_rdy_trigger_set_state() set datardy interrupt state
26 **/
27static int adis16209_data_rdy_trigger_set_state(struct iio_trigger *trig,
28 bool state)
29{
30 struct iio_dev *indio_dev = trig->private_data;
31
32 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
33 return adis16209_set_irq(indio_dev, state);
34}
35
36int adis16209_probe_trigger(struct iio_dev *indio_dev)
37{
38 int ret;
39 struct adis16209_state *st = iio_priv(indio_dev);
40
41 st->trig = iio_allocate_trigger("adis16209-dev%d", indio_dev->id);
42 if (st->trig == NULL) {
43 ret = -ENOMEM;
44 goto error_ret;
45 }
46
47 ret = request_irq(st->us->irq,
48 adis16209_data_rdy_trig_poll,
49 IRQF_TRIGGER_RISING,
50 "adis16209",
51 st->trig);
52 if (ret)
53 goto error_free_trig;
54 st->trig->dev.parent = &st->us->dev;
55 st->trig->owner = THIS_MODULE;
56 st->trig->private_data = indio_dev;
57 st->trig->set_trigger_state = &adis16209_data_rdy_trigger_set_state;
58 ret = iio_trigger_register(st->trig);
59
60 /* select default trigger */
61 indio_dev->trig = st->trig;
62 if (ret)
63 goto error_free_irq;
64
65 return 0;
66
67error_free_irq:
68 free_irq(st->us->irq, st->trig);
69error_free_trig:
70 iio_free_trigger(st->trig);
71error_ret:
72 return ret;
73}
74
75void adis16209_remove_trigger(struct iio_dev *indio_dev)
76{
77 struct adis16209_state *st = iio_priv(indio_dev);
78
79 iio_trigger_unregister(st->trig);
80 free_irq(st->us->irq, st->trig);
81 iio_free_trigger(st->trig);
82}
diff --git a/drivers/staging/iio/accel/adis16240_ring.c b/drivers/staging/iio/accel/adis16240_ring.c
new file mode 100644
index 00000000000..c812a34daca
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16240_ring.c
@@ -0,0 +1,152 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/gpio.h>
4#include <linux/workqueue.h>
5#include <linux/mutex.h>
6#include <linux/device.h>
7#include <linux/kernel.h>
8#include <linux/spi/spi.h>
9#include <linux/slab.h>
10#include <linux/sysfs.h>
11#include <linux/list.h>
12
13#include "../iio.h"
14#include "../sysfs.h"
15#include "../ring_sw.h"
16#include "accel.h"
17#include "../trigger.h"
18#include "adis16240.h"
19
20/**
21 * adis16240_read_ring_data() read data registers which will be placed into ring
22 * @dev: device associated with child of actual device (iio_dev or iio_trig)
23 * @rx: somewhere to pass back the value read
24 **/
25static int adis16240_read_ring_data(struct device *dev, u8 *rx)
26{
27 struct spi_message msg;
28 struct iio_dev *indio_dev = dev_get_drvdata(dev);
29 struct adis16240_state *st = iio_priv(indio_dev);
30 struct spi_transfer xfers[ADIS16240_OUTPUTS + 1];
31 int ret;
32 int i;
33
34 mutex_lock(&st->buf_lock);
35
36 spi_message_init(&msg);
37
38 memset(xfers, 0, sizeof(xfers));
39 for (i = 0; i <= ADIS16240_OUTPUTS; i++) {
40 xfers[i].bits_per_word = 8;
41 xfers[i].cs_change = 1;
42 xfers[i].len = 2;
43 xfers[i].delay_usecs = 30;
44 xfers[i].tx_buf = st->tx + 2 * i;
45 st->tx[2 * i]
46 = ADIS16240_READ_REG(ADIS16240_SUPPLY_OUT + 2 * i);
47 st->tx[2 * i + 1] = 0;
48 if (i >= 1)
49 xfers[i].rx_buf = rx + 2 * (i - 1);
50 spi_message_add_tail(&xfers[i], &msg);
51 }
52
53 ret = spi_sync(st->us, &msg);
54 if (ret)
55 dev_err(&st->us->dev, "problem when burst reading");
56
57 mutex_unlock(&st->buf_lock);
58
59 return ret;
60}
61
62static irqreturn_t adis16240_trigger_handler(int irq, void *p)
63{
64 struct iio_poll_func *pf = p;
65 struct iio_dev *indio_dev = pf->private_data;
66 struct adis16240_state *st = iio_priv(indio_dev);
67 struct iio_ring_buffer *ring = indio_dev->ring;
68
69 int i = 0;
70 s16 *data;
71 size_t datasize = ring->access->get_bytes_per_datum(ring);
72
73 data = kmalloc(datasize, GFP_KERNEL);
74 if (data == NULL) {
75 dev_err(&st->us->dev, "memory alloc failed in ring bh");
76 return -ENOMEM;
77 }
78
79 if (ring->scan_count &&
80 adis16240_read_ring_data(&indio_dev->dev, st->rx) >= 0)
81 for (; i < ring->scan_count; i++)
82 data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
83
84 /* Guaranteed to be aligned with 8 byte boundary */
85 if (ring->scan_timestamp)
86 *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
87
88 ring->access->store_to(ring, (u8 *)data, pf->timestamp);
89
90 iio_trigger_notify_done(indio_dev->trig);
91 kfree(data);
92
93 return IRQ_HANDLED;
94}
95
96void adis16240_unconfigure_ring(struct iio_dev *indio_dev)
97{
98 iio_dealloc_pollfunc(indio_dev->pollfunc);
99 iio_sw_rb_free(indio_dev->ring);
100}
101
102static const struct iio_ring_setup_ops adis16240_ring_setup_ops = {
103 .preenable = &iio_sw_ring_preenable,
104 .postenable = &iio_triggered_ring_postenable,
105 .predisable = &iio_triggered_ring_predisable,
106};
107
108int adis16240_configure_ring(struct iio_dev *indio_dev)
109{
110 int ret = 0;
111 struct iio_ring_buffer *ring;
112
113 ring = iio_sw_rb_allocate(indio_dev);
114 if (!ring) {
115 ret = -ENOMEM;
116 return ret;
117 }
118 indio_dev->ring = ring;
119 /* Effectively select the ring buffer implementation */
120 ring->access = &ring_sw_access_funcs;
121 ring->bpe = 2;
122 ring->scan_timestamp = true;
123 ring->setup_ops = &adis16240_ring_setup_ops;
124 ring->owner = THIS_MODULE;
125
126 /* Set default scan mode */
127 iio_scan_mask_set(ring, ADIS16240_SCAN_SUPPLY);
128 iio_scan_mask_set(ring, ADIS16240_SCAN_ACC_X);
129 iio_scan_mask_set(ring, ADIS16240_SCAN_ACC_Y);
130 iio_scan_mask_set(ring, ADIS16240_SCAN_ACC_Z);
131 iio_scan_mask_set(ring, ADIS16240_SCAN_AUX_ADC);
132 iio_scan_mask_set(ring, ADIS16240_SCAN_TEMP);
133
134 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
135 &adis16240_trigger_handler,
136 IRQF_ONESHOT,
137 indio_dev,
138 "%s_consumer%d",
139 indio_dev->name,
140 indio_dev->id);
141 if (indio_dev->pollfunc == NULL) {
142 ret = -ENOMEM;
143 goto error_iio_sw_rb_free;
144 }
145
146 indio_dev->modes |= INDIO_RING_TRIGGERED;
147 return 0;
148
149error_iio_sw_rb_free:
150 iio_sw_rb_free(indio_dev->ring);
151 return ret;
152}
diff --git a/drivers/staging/iio/accel/adis16240_trigger.c b/drivers/staging/iio/accel/adis16240_trigger.c
new file mode 100644
index 00000000000..17135fc33c9
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16240_trigger.c
@@ -0,0 +1,83 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/mutex.h>
4#include <linux/device.h>
5#include <linux/kernel.h>
6#include <linux/sysfs.h>
7#include <linux/list.h>
8#include <linux/spi/spi.h>
9
10#include "../iio.h"
11#include "../sysfs.h"
12#include "../trigger.h"
13#include "adis16240.h"
14
15/**
16 * adis16240_data_rdy_trig_poll() the event handler for the data rdy trig
17 **/
18static irqreturn_t adis16240_data_rdy_trig_poll(int irq, void *trig)
19{
20 iio_trigger_poll(trig, iio_get_time_ns());
21 return IRQ_HANDLED;
22}
23
24/**
25 * adis16240_data_rdy_trigger_set_state() set datardy interrupt state
26 **/
27static int adis16240_data_rdy_trigger_set_state(struct iio_trigger *trig,
28 bool state)
29{
30 struct iio_dev *indio_dev = trig->private_data;
31
32 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
33 return adis16240_set_irq(indio_dev, state);
34}
35
36int adis16240_probe_trigger(struct iio_dev *indio_dev)
37{
38 int ret;
39 struct adis16240_state *st = iio_priv(indio_dev);
40
41 st->trig = iio_allocate_trigger("adis16240-dev%d", indio_dev->id);
42 if (st->trig == NULL) {
43 ret = -ENOMEM;
44 goto error_ret;
45 }
46
47 ret = request_irq(st->us->irq,
48 adis16240_data_rdy_trig_poll,
49 IRQF_TRIGGER_RISING,
50 "adis16240",
51 st->trig);
52 if (ret)
53 goto error_free_trig;
54
55 st->trig->dev.parent = &st->us->dev;
56 st->trig->owner = THIS_MODULE;
57 st->trig->private_data = indio_dev;
58 st->trig->set_trigger_state = &adis16240_data_rdy_trigger_set_state;
59 ret = iio_trigger_register(st->trig);
60
61 /* select default trigger */
62 indio_dev->trig = st->trig;
63 if (ret)
64 goto error_free_irq;
65
66 return 0;
67
68error_free_irq:
69 free_irq(st->us->irq, st->trig);
70error_free_trig:
71 iio_free_trigger(st->trig);
72error_ret:
73 return ret;
74}
75
76void adis16240_remove_trigger(struct iio_dev *indio_dev)
77{
78 struct adis16240_state *st = iio_priv(indio_dev);
79
80 iio_trigger_unregister(st->trig);
81 free_irq(st->us->irq, st->trig);
82 iio_free_trigger(st->trig);
83}
diff --git a/drivers/staging/iio/accel/inclinometer.h b/drivers/staging/iio/accel/inclinometer.h
new file mode 100644
index 00000000000..faf73d7892e
--- /dev/null
+++ b/drivers/staging/iio/accel/inclinometer.h
@@ -0,0 +1,25 @@
1/*
2 * Inclinometer related attributes
3 */
4#include "../sysfs.h"
5
6#define IIO_DEV_ATTR_INCLI_X(_show, _addr) \
7 IIO_DEVICE_ATTR(incli_x_raw, S_IRUGO, _show, NULL, _addr)
8
9#define IIO_DEV_ATTR_INCLI_Y(_show, _addr) \
10 IIO_DEVICE_ATTR(incli_y_raw, S_IRUGO, _show, NULL, _addr)
11
12#define IIO_DEV_ATTR_INCLI_Z(_show, _addr) \
13 IIO_DEVICE_ATTR(incli_z_raw, S_IRUGO, _show, NULL, _addr)
14
15#define IIO_DEV_ATTR_INCLI_X_OFFSET(_mode, _show, _store, _addr) \
16 IIO_DEVICE_ATTR(incli_x_offset, _mode, _show, _store, _addr)
17
18#define IIO_DEV_ATTR_INCLI_Y_OFFSET(_mode, _show, _store, _addr) \
19 IIO_DEVICE_ATTR(incli_y_offset, _mode, _show, _store, _addr)
20
21#define IIO_DEV_ATTR_INCLI_Z_OFFSET(_mode, _show, _store, _addr) \
22 IIO_DEVICE_ATTR(incli_z_offset, _mode, _show, _store, _addr)
23
24#define IIO_CONST_ATTR_INCLI_SCALE(_string) \
25 IIO_CONST_ATTR(incli_scale, _string)
diff --git a/drivers/staging/iio/adc/ad7150.c b/drivers/staging/iio/adc/ad7150.c
new file mode 100644
index 00000000000..04017ef6688
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7150.c
@@ -0,0 +1,812 @@
1/*
2 * AD7150 capacitive sensor driver supporting AD7150/1/6
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/i2c.h>
14
15#include "../iio.h"
16#include "../sysfs.h"
17
18/*
19 * AD7150 registers definition
20 */
21
22#define AD7150_STATUS 0
23#define AD7150_STATUS_OUT1 (1 << 3)
24#define AD7150_STATUS_OUT2 (1 << 5)
25#define AD7150_CH1_DATA_HIGH 1
26#define AD7150_CH1_DATA_LOW 2
27#define AD7150_CH2_DATA_HIGH 3
28#define AD7150_CH2_DATA_LOW 4
29#define AD7150_CH1_AVG_HIGH 5
30#define AD7150_CH1_AVG_LOW 6
31#define AD7150_CH2_AVG_HIGH 7
32#define AD7150_CH2_AVG_LOW 8
33#define AD7150_CH1_SENSITIVITY 9
34#define AD7150_CH1_THR_HOLD_H 9
35#define AD7150_CH1_TIMEOUT 10
36#define AD7150_CH1_THR_HOLD_L 10
37#define AD7150_CH1_SETUP 11
38#define AD7150_CH2_SENSITIVITY 12
39#define AD7150_CH2_THR_HOLD_H 12
40#define AD7150_CH2_TIMEOUT 13
41#define AD7150_CH2_THR_HOLD_L 13
42#define AD7150_CH2_SETUP 14
43#define AD7150_CFG 15
44#define AD7150_CFG_FIX (1 << 7)
45#define AD7150_PD_TIMER 16
46#define AD7150_CH1_CAPDAC 17
47#define AD7150_CH2_CAPDAC 18
48#define AD7150_SN3 19
49#define AD7150_SN2 20
50#define AD7150_SN1 21
51#define AD7150_SN0 22
52#define AD7150_ID 23
53
54#define AD7150_MAX_CONV_MODE 4
55
56/*
57 * struct ad7150_chip_info - chip specifc information
58 */
59
60struct ad7150_chip_info {
61 struct i2c_client *client;
62 bool inter;
63 u16 ch1_threshold; /* Ch1 Threshold (in fixed threshold mode) */
64 u8 ch1_sensitivity; /* Ch1 Sensitivity (in adaptive threshold mode) */
65 u8 ch1_timeout; /* Ch1 Timeout (in adaptive threshold mode) */
66 u8 ch1_setup;
67 u16 ch2_threshold; /* Ch2 Threshold (in fixed threshold mode) */
68 u8 ch2_sensitivity; /* Ch1 Sensitivity (in adaptive threshold mode) */
69 u8 ch2_timeout; /* Ch1 Timeout (in adaptive threshold mode) */
70 u8 ch2_setup;
71 u8 powerdown_timer;
72 char threshold_mode[10]; /* adaptive/fixed threshold mode */
73 int old_state;
74 char *conversion_mode;
75};
76
77struct ad7150_conversion_mode {
78 char *name;
79 u8 reg_cfg;
80};
81
82static struct ad7150_conversion_mode
83ad7150_conv_mode_table[AD7150_MAX_CONV_MODE] = {
84 { "idle", 0 },
85 { "continuous-conversion", 1 },
86 { "single-conversion", 2 },
87 { "power-down", 3 },
88};
89
90/*
91 * ad7150 register access by I2C
92 */
93
94static int ad7150_i2c_read(struct ad7150_chip_info *chip, u8 reg, u8 *data, int len)
95{
96 struct i2c_client *client = chip->client;
97 int ret = 0;
98
99 ret = i2c_master_send(client, &reg, 1);
100 if (ret < 0) {
101 dev_err(&client->dev, "I2C write error\n");
102 return ret;
103 }
104
105 ret = i2c_master_recv(client, data, len);
106 if (ret < 0) {
107 dev_err(&client->dev, "I2C read error\n");
108 return ret;
109 }
110
111 return ret;
112}
113
114static int ad7150_i2c_write(struct ad7150_chip_info *chip, u8 reg, u8 data)
115{
116 struct i2c_client *client = chip->client;
117 int ret = 0;
118
119 u8 tx[2] = {
120 reg,
121 data,
122 };
123
124 ret = i2c_master_send(client, tx, 2);
125 if (ret < 0)
126 dev_err(&client->dev, "I2C write error\n");
127
128 return ret;
129}
130
131/*
132 * sysfs nodes
133 */
134
135#define IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(_show) \
136 IIO_DEVICE_ATTR(available_conversion_modes, S_IRUGO, _show, NULL, 0)
137#define IIO_DEV_ATTR_CONVERSION_MODE(_mode, _show, _store) \
138 IIO_DEVICE_ATTR(conversion_mode, _mode, _show, _store, 0)
139#define IIO_DEV_ATTR_AVAIL_THRESHOLD_MODES(_show) \
140 IIO_DEVICE_ATTR(available_threshold_modes, S_IRUGO, _show, NULL, 0)
141#define IIO_DEV_ATTR_THRESHOLD_MODE(_mode, _show, _store) \
142 IIO_DEVICE_ATTR(threshold_mode, _mode, _show, _store, 0)
143#define IIO_DEV_ATTR_CH1_THRESHOLD(_mode, _show, _store) \
144 IIO_DEVICE_ATTR(ch1_threshold, _mode, _show, _store, 0)
145#define IIO_DEV_ATTR_CH2_THRESHOLD(_mode, _show, _store) \
146 IIO_DEVICE_ATTR(ch2_threshold, _mode, _show, _store, 0)
147#define IIO_DEV_ATTR_CH1_SENSITIVITY(_mode, _show, _store) \
148 IIO_DEVICE_ATTR(ch1_sensitivity, _mode, _show, _store, 0)
149#define IIO_DEV_ATTR_CH2_SENSITIVITY(_mode, _show, _store) \
150 IIO_DEVICE_ATTR(ch2_sensitivity, _mode, _show, _store, 0)
151#define IIO_DEV_ATTR_CH1_TIMEOUT(_mode, _show, _store) \
152 IIO_DEVICE_ATTR(ch1_timeout, _mode, _show, _store, 0)
153#define IIO_DEV_ATTR_CH2_TIMEOUT(_mode, _show, _store) \
154 IIO_DEVICE_ATTR(ch2_timeout, _mode, _show, _store, 0)
155#define IIO_DEV_ATTR_CH1_VALUE(_show) \
156 IIO_DEVICE_ATTR(ch1_value, S_IRUGO, _show, NULL, 0)
157#define IIO_DEV_ATTR_CH2_VALUE(_show) \
158 IIO_DEVICE_ATTR(ch2_value, S_IRUGO, _show, NULL, 0)
159#define IIO_DEV_ATTR_CH1_SETUP(_mode, _show, _store) \
160 IIO_DEVICE_ATTR(ch1_setup, _mode, _show, _store, 0)
161#define IIO_DEV_ATTR_CH2_SETUP(_mode, _show, _store) \
162 IIO_DEVICE_ATTR(ch2_setup, _mode, _show, _store, 0)
163#define IIO_DEV_ATTR_POWERDOWN_TIMER(_mode, _show, _store) \
164 IIO_DEVICE_ATTR(powerdown_timer, _mode, _show, _store, 0)
165
166static ssize_t ad7150_show_conversion_modes(struct device *dev,
167 struct device_attribute *attr,
168 char *buf)
169{
170 int i;
171 int len = 0;
172
173 for (i = 0; i < AD7150_MAX_CONV_MODE; i++)
174 len += sprintf(buf + len, "%s\n", ad7150_conv_mode_table[i].name);
175
176 return len;
177}
178
179static IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(ad7150_show_conversion_modes);
180
181static ssize_t ad7150_show_conversion_mode(struct device *dev,
182 struct device_attribute *attr,
183 char *buf)
184{
185 struct iio_dev *dev_info = dev_get_drvdata(dev);
186 struct ad7150_chip_info *chip = iio_priv(dev_info);
187
188 return sprintf(buf, "%s\n", chip->conversion_mode);
189}
190
191static ssize_t ad7150_store_conversion_mode(struct device *dev,
192 struct device_attribute *attr,
193 const char *buf,
194 size_t len)
195{
196 struct iio_dev *dev_info = dev_get_drvdata(dev);
197 struct ad7150_chip_info *chip = iio_priv(dev_info);
198 u8 cfg;
199 int i;
200
201 ad7150_i2c_read(chip, AD7150_CFG, &cfg, 1);
202
203 for (i = 0; i < AD7150_MAX_CONV_MODE; i++) {
204 if (strncmp(buf, ad7150_conv_mode_table[i].name,
205 strlen(ad7150_conv_mode_table[i].name) - 1) == 0) {
206 chip->conversion_mode = ad7150_conv_mode_table[i].name;
207 cfg |= 0x18 | ad7150_conv_mode_table[i].reg_cfg;
208 ad7150_i2c_write(chip, AD7150_CFG, cfg);
209 return len;
210 }
211 }
212
213 dev_err(dev, "not supported conversion mode\n");
214
215 return -EINVAL;
216}
217
218static IIO_DEV_ATTR_CONVERSION_MODE(S_IRUGO | S_IWUSR,
219 ad7150_show_conversion_mode,
220 ad7150_store_conversion_mode);
221
222static ssize_t ad7150_show_threshold_modes(struct device *dev,
223 struct device_attribute *attr,
224 char *buf)
225{
226 return sprintf(buf, "adaptive\nfixed\n");
227}
228
229static IIO_DEV_ATTR_AVAIL_THRESHOLD_MODES(ad7150_show_threshold_modes);
230
231static ssize_t ad7150_show_ch1_value(struct device *dev,
232 struct device_attribute *attr,
233 char *buf)
234{
235 struct iio_dev *dev_info = dev_get_drvdata(dev);
236 struct ad7150_chip_info *chip = iio_priv(dev_info);
237 u8 data[2];
238
239 ad7150_i2c_read(chip, AD7150_CH1_DATA_HIGH, data, 2);
240 return sprintf(buf, "%d\n", ((int) data[0] << 8) | data[1]);
241}
242
243static IIO_DEV_ATTR_CH1_VALUE(ad7150_show_ch1_value);
244
245static ssize_t ad7150_show_ch2_value(struct device *dev,
246 struct device_attribute *attr,
247 char *buf)
248{
249 struct iio_dev *dev_info = dev_get_drvdata(dev);
250 struct ad7150_chip_info *chip = iio_priv(dev_info);
251 u8 data[2];
252
253 ad7150_i2c_read(chip, AD7150_CH2_DATA_HIGH, data, 2);
254 return sprintf(buf, "%d\n", ((int) data[0] << 8) | data[1]);
255}
256
257static IIO_DEV_ATTR_CH2_VALUE(ad7150_show_ch2_value);
258
259static ssize_t ad7150_show_threshold_mode(struct device *dev,
260 struct device_attribute *attr,
261 char *buf)
262{
263 struct iio_dev *dev_info = dev_get_drvdata(dev);
264 struct ad7150_chip_info *chip = iio_priv(dev_info);
265
266 return sprintf(buf, "%s\n", chip->threshold_mode);
267}
268
269static ssize_t ad7150_store_threshold_mode(struct device *dev,
270 struct device_attribute *attr,
271 const char *buf,
272 size_t len)
273{
274 struct iio_dev *dev_info = dev_get_drvdata(dev);
275 struct ad7150_chip_info *chip = iio_priv(dev_info);
276 u8 cfg;
277
278 ad7150_i2c_read(chip, AD7150_CFG, &cfg, 1);
279
280 if (strncmp(buf, "fixed", 5) == 0) {
281 strcpy(chip->threshold_mode, "fixed");
282 cfg |= AD7150_CFG_FIX;
283 ad7150_i2c_write(chip, AD7150_CFG, cfg);
284
285 return len;
286 } else if (strncmp(buf, "adaptive", 8) == 0) {
287 strcpy(chip->threshold_mode, "adaptive");
288 cfg &= ~AD7150_CFG_FIX;
289 ad7150_i2c_write(chip, AD7150_CFG, cfg);
290
291 return len;
292 }
293
294 dev_err(dev, "not supported threshold mode\n");
295 return -EINVAL;
296}
297
298static IIO_DEV_ATTR_THRESHOLD_MODE(S_IRUGO | S_IWUSR,
299 ad7150_show_threshold_mode,
300 ad7150_store_threshold_mode);
301
302static ssize_t ad7150_show_ch1_threshold(struct device *dev,
303 struct device_attribute *attr,
304 char *buf)
305{
306 struct iio_dev *dev_info = dev_get_drvdata(dev);
307 struct ad7150_chip_info *chip = iio_priv(dev_info);
308
309 return sprintf(buf, "%d\n", chip->ch1_threshold);
310}
311
312static ssize_t ad7150_store_ch1_threshold(struct device *dev,
313 struct device_attribute *attr,
314 const char *buf,
315 size_t len)
316{
317 struct iio_dev *dev_info = dev_get_drvdata(dev);
318 struct ad7150_chip_info *chip = iio_priv(dev_info);
319 unsigned long data;
320 int ret;
321
322 ret = strict_strtoul(buf, 10, &data);
323
324 if ((!ret) && (data < 0x10000)) {
325 ad7150_i2c_write(chip, AD7150_CH1_THR_HOLD_H, data >> 8);
326 ad7150_i2c_write(chip, AD7150_CH1_THR_HOLD_L, data);
327 chip->ch1_threshold = data;
328 return len;
329 }
330
331 return -EINVAL;
332}
333
334static IIO_DEV_ATTR_CH1_THRESHOLD(S_IRUGO | S_IWUSR,
335 ad7150_show_ch1_threshold,
336 ad7150_store_ch1_threshold);
337
338static ssize_t ad7150_show_ch2_threshold(struct device *dev,
339 struct device_attribute *attr,
340 char *buf)
341{
342 struct iio_dev *dev_info = dev_get_drvdata(dev);
343 struct ad7150_chip_info *chip = iio_priv(dev_info);
344
345 return sprintf(buf, "%d\n", chip->ch2_threshold);
346}
347
348static ssize_t ad7150_store_ch2_threshold(struct device *dev,
349 struct device_attribute *attr,
350 const char *buf,
351 size_t len)
352{
353 struct iio_dev *dev_info = dev_get_drvdata(dev);
354 struct ad7150_chip_info *chip = iio_priv(dev_info);
355 unsigned long data;
356 int ret;
357
358 ret = strict_strtoul(buf, 10, &data);
359
360 if ((!ret) && (data < 0x10000)) {
361 ad7150_i2c_write(chip, AD7150_CH2_THR_HOLD_H, data >> 8);
362 ad7150_i2c_write(chip, AD7150_CH2_THR_HOLD_L, data);
363 chip->ch2_threshold = data;
364 return len;
365 }
366
367 return -EINVAL;
368}
369
370static IIO_DEV_ATTR_CH2_THRESHOLD(S_IRUGO | S_IWUSR,
371 ad7150_show_ch2_threshold,
372 ad7150_store_ch2_threshold);
373
374static ssize_t ad7150_show_ch1_sensitivity(struct device *dev,
375 struct device_attribute *attr,
376 char *buf)
377{
378 struct iio_dev *dev_info = dev_get_drvdata(dev);
379 struct ad7150_chip_info *chip = iio_priv(dev_info);
380
381 return sprintf(buf, "%d\n", chip->ch1_sensitivity);
382}
383
384static ssize_t ad7150_store_ch1_sensitivity(struct device *dev,
385 struct device_attribute *attr,
386 const char *buf,
387 size_t len)
388{
389 struct iio_dev *dev_info = dev_get_drvdata(dev);
390 struct ad7150_chip_info *chip = iio_priv(dev_info);
391 unsigned long data;
392 int ret;
393
394 ret = strict_strtoul(buf, 10, &data);
395
396 if ((!ret) && (data < 0x100)) {
397 ad7150_i2c_write(chip, AD7150_CH1_SENSITIVITY, data);
398 chip->ch1_sensitivity = data;
399 return len;
400 }
401
402 return -EINVAL;
403}
404
405static IIO_DEV_ATTR_CH1_SENSITIVITY(S_IRUGO | S_IWUSR,
406 ad7150_show_ch1_sensitivity,
407 ad7150_store_ch1_sensitivity);
408
409static ssize_t ad7150_show_ch2_sensitivity(struct device *dev,
410 struct device_attribute *attr,
411 char *buf)
412{
413 struct iio_dev *dev_info = dev_get_drvdata(dev);
414 struct ad7150_chip_info *chip = iio_priv(dev_info);
415
416 return sprintf(buf, "%d\n", chip->ch2_sensitivity);
417}
418
419static ssize_t ad7150_store_ch2_sensitivity(struct device *dev,
420 struct device_attribute *attr,
421 const char *buf,
422 size_t len)
423{
424 struct iio_dev *dev_info = dev_get_drvdata(dev);
425 struct ad7150_chip_info *chip = iio_priv(dev_info);
426 unsigned long data;
427 int ret;
428
429 ret = strict_strtoul(buf, 10, &data);
430
431 if ((!ret) && (data < 0x100)) {
432 ad7150_i2c_write(chip, AD7150_CH2_SENSITIVITY, data);
433 chip->ch2_sensitivity = data;
434 return len;
435 }
436
437 return -EINVAL;
438}
439
440static IIO_DEV_ATTR_CH2_SENSITIVITY(S_IRUGO | S_IWUSR,
441 ad7150_show_ch2_sensitivity,
442 ad7150_store_ch2_sensitivity);
443
444static ssize_t ad7150_show_ch1_timeout(struct device *dev,
445 struct device_attribute *attr,
446 char *buf)
447{
448 struct iio_dev *dev_info = dev_get_drvdata(dev);
449 struct ad7150_chip_info *chip = iio_priv(dev_info);
450
451 return sprintf(buf, "%d\n", chip->ch1_timeout);
452}
453
454static ssize_t ad7150_store_ch1_timeout(struct device *dev,
455 struct device_attribute *attr,
456 const char *buf,
457 size_t len)
458{
459 struct iio_dev *dev_info = dev_get_drvdata(dev);
460 struct ad7150_chip_info *chip = iio_priv(dev_info);
461 unsigned long data;
462 int ret;
463
464 ret = strict_strtoul(buf, 10, &data);
465
466 if ((!ret) && (data < 0x100)) {
467 ad7150_i2c_write(chip, AD7150_CH1_TIMEOUT, data);
468 chip->ch1_timeout = data;
469 return len;
470 }
471
472 return -EINVAL;
473}
474
475static IIO_DEV_ATTR_CH1_TIMEOUT(S_IRUGO | S_IWUSR,
476 ad7150_show_ch1_timeout,
477 ad7150_store_ch1_timeout);
478
479static ssize_t ad7150_show_ch2_timeout(struct device *dev,
480 struct device_attribute *attr,
481 char *buf)
482{
483 struct iio_dev *dev_info = dev_get_drvdata(dev);
484 struct ad7150_chip_info *chip = iio_priv(dev_info);
485
486 return sprintf(buf, "%d\n", chip->ch2_timeout);
487}
488
489static ssize_t ad7150_store_ch2_timeout(struct device *dev,
490 struct device_attribute *attr,
491 const char *buf,
492 size_t len)
493{
494 struct iio_dev *dev_info = dev_get_drvdata(dev);
495 struct ad7150_chip_info *chip = iio_priv(dev_info);
496 unsigned long data;
497 int ret;
498
499 ret = strict_strtoul(buf, 10, &data);
500
501 if ((!ret) && (data < 0x100)) {
502 ad7150_i2c_write(chip, AD7150_CH2_TIMEOUT, data);
503 chip->ch2_timeout = data;
504 return len;
505 }
506
507 return -EINVAL;
508}
509
510static IIO_DEV_ATTR_CH2_TIMEOUT(S_IRUGO | S_IWUSR,
511 ad7150_show_ch2_timeout,
512 ad7150_store_ch2_timeout);
513
514static ssize_t ad7150_show_ch1_setup(struct device *dev,
515 struct device_attribute *attr,
516 char *buf)
517{
518 struct iio_dev *dev_info = dev_get_drvdata(dev);
519 struct ad7150_chip_info *chip = iio_priv(dev_info);
520
521 return sprintf(buf, "0x%02x\n", chip->ch1_setup);
522}
523
524static ssize_t ad7150_store_ch1_setup(struct device *dev,
525 struct device_attribute *attr,
526 const char *buf,
527 size_t len)
528{
529 struct iio_dev *dev_info = dev_get_drvdata(dev);
530 struct ad7150_chip_info *chip = iio_priv(dev_info);
531 unsigned long data;
532 int ret;
533
534 ret = strict_strtoul(buf, 10, &data);
535
536 if ((!ret) && (data < 0x100)) {
537 ad7150_i2c_write(chip, AD7150_CH1_SETUP, data);
538 chip->ch1_setup = data;
539 return len;
540 }
541
542
543 return -EINVAL;
544}
545
546static IIO_DEV_ATTR_CH1_SETUP(S_IRUGO | S_IWUSR,
547 ad7150_show_ch1_setup,
548 ad7150_store_ch1_setup);
549
550static ssize_t ad7150_show_ch2_setup(struct device *dev,
551 struct device_attribute *attr,
552 char *buf)
553{
554 struct iio_dev *dev_info = dev_get_drvdata(dev);
555 struct ad7150_chip_info *chip = iio_priv(dev_info);
556
557 return sprintf(buf, "0x%02x\n", chip->ch2_setup);
558}
559
560static ssize_t ad7150_store_ch2_setup(struct device *dev,
561 struct device_attribute *attr,
562 const char *buf,
563 size_t len)
564{
565 struct iio_dev *dev_info = dev_get_drvdata(dev);
566 struct ad7150_chip_info *chip = iio_priv(dev_info);
567 unsigned long data;
568 int ret;
569
570 ret = strict_strtoul(buf, 10, &data);
571
572 if ((!ret) && (data < 0x100)) {
573 ad7150_i2c_write(chip, AD7150_CH2_SETUP, data);
574 chip->ch2_setup = data;
575 return len;
576 }
577
578 return -EINVAL;
579}
580
581static IIO_DEV_ATTR_CH2_SETUP(S_IRUGO | S_IWUSR,
582 ad7150_show_ch2_setup,
583 ad7150_store_ch2_setup);
584
585static ssize_t ad7150_show_powerdown_timer(struct device *dev,
586 struct device_attribute *attr,
587 char *buf)
588{
589 struct iio_dev *dev_info = dev_get_drvdata(dev);
590 struct ad7150_chip_info *chip = iio_priv(dev_info);
591
592 return sprintf(buf, "0x%02x\n", chip->powerdown_timer);
593}
594
595static ssize_t ad7150_store_powerdown_timer(struct device *dev,
596 struct device_attribute *attr,
597 const char *buf,
598 size_t len)
599{
600 struct iio_dev *dev_info = dev_get_drvdata(dev);
601 struct ad7150_chip_info *chip = iio_priv(dev_info);
602 unsigned long data;
603 int ret;
604
605 ret = strict_strtoul(buf, 10, &data);
606
607 if ((!ret) && (data < 0x40)) {
608 chip->powerdown_timer = data;
609 return len;
610 }
611
612 return -EINVAL;
613}
614
615static IIO_DEV_ATTR_POWERDOWN_TIMER(S_IRUGO | S_IWUSR,
616 ad7150_show_powerdown_timer,
617 ad7150_store_powerdown_timer);
618
619static struct attribute *ad7150_attributes[] = {
620 &iio_dev_attr_available_threshold_modes.dev_attr.attr,
621 &iio_dev_attr_threshold_mode.dev_attr.attr,
622 &iio_dev_attr_ch1_threshold.dev_attr.attr,
623 &iio_dev_attr_ch2_threshold.dev_attr.attr,
624 &iio_dev_attr_ch1_timeout.dev_attr.attr,
625 &iio_dev_attr_ch2_timeout.dev_attr.attr,
626 &iio_dev_attr_ch1_setup.dev_attr.attr,
627 &iio_dev_attr_ch2_setup.dev_attr.attr,
628 &iio_dev_attr_ch1_sensitivity.dev_attr.attr,
629 &iio_dev_attr_ch2_sensitivity.dev_attr.attr,
630 &iio_dev_attr_powerdown_timer.dev_attr.attr,
631 &iio_dev_attr_ch1_value.dev_attr.attr,
632 &iio_dev_attr_ch2_value.dev_attr.attr,
633 NULL,
634};
635
636static const struct attribute_group ad7150_attribute_group = {
637 .attrs = ad7150_attributes,
638};
639
640/*
641 * threshold events
642 */
643
644static irqreturn_t ad7150_event_handler(int irq, void *private)
645{
646 struct iio_dev *indio_dev = private;
647 struct ad7150_chip_info *chip = iio_priv(indio_dev);
648 u8 int_status;
649 s64 timestamp = iio_get_time_ns();
650
651 ad7150_i2c_read(chip, AD7150_STATUS, &int_status, 1);
652
653 if ((int_status & AD7150_STATUS_OUT1) && !(chip->old_state & AD7150_STATUS_OUT1))
654 iio_push_event(indio_dev, 0,
655 IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
656 0,
657 IIO_EV_TYPE_THRESH,
658 IIO_EV_DIR_RISING),
659 timestamp);
660 else if ((!(int_status & AD7150_STATUS_OUT1)) && (chip->old_state & AD7150_STATUS_OUT1))
661 iio_push_event(indio_dev, 0,
662 IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
663 0,
664 IIO_EV_TYPE_THRESH,
665 IIO_EV_DIR_FALLING),
666 timestamp);
667
668 if ((int_status & AD7150_STATUS_OUT2) && !(chip->old_state & AD7150_STATUS_OUT2))
669 iio_push_event(indio_dev, 0,
670 IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
671 1,
672 IIO_EV_TYPE_THRESH,
673 IIO_EV_DIR_RISING),
674 timestamp);
675 else if ((!(int_status & AD7150_STATUS_OUT2)) && (chip->old_state & AD7150_STATUS_OUT2))
676 iio_push_event(indio_dev, 0,
677 IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
678 1,
679 IIO_EV_TYPE_THRESH,
680 IIO_EV_DIR_FALLING),
681 timestamp);
682 return IRQ_HANDLED;
683}
684
685static IIO_CONST_ATTR(ch1_high_en, "1");
686static IIO_CONST_ATTR(ch2_high_en, "1");
687static IIO_CONST_ATTR(ch1_low_en, "1");
688static IIO_CONST_ATTR(ch2_low_en, "1");
689
690static struct attribute *ad7150_event_attributes[] = {
691 &iio_const_attr_ch1_high_en.dev_attr.attr,
692 &iio_const_attr_ch2_high_en.dev_attr.attr,
693 &iio_const_attr_ch1_low_en.dev_attr.attr,
694 &iio_const_attr_ch2_low_en.dev_attr.attr,
695 NULL,
696};
697
698static struct attribute_group ad7150_event_attribute_group = {
699 .attrs = ad7150_event_attributes,
700};
701
702static const struct iio_info ad7150_info = {
703 .attrs = &ad7150_attribute_group,
704 .num_interrupt_lines = 1,
705 .event_attrs = &ad7150_event_attribute_group,
706 .driver_module = THIS_MODULE,
707};
708/*
709 * device probe and remove
710 */
711
712static int __devinit ad7150_probe(struct i2c_client *client,
713 const struct i2c_device_id *id)
714{
715 int ret = 0, regdone = 0;
716 struct ad7150_chip_info *chip;
717 struct iio_dev *indio_dev;
718
719 indio_dev = iio_allocate_device(sizeof(*chip));
720 if (indio_dev == NULL) {
721 ret = -ENOMEM;
722 goto error_ret;
723 }
724 chip = iio_priv(indio_dev);
725 /* this is only used for device removal purposes */
726 i2c_set_clientdata(client, indio_dev);
727
728 chip->client = client;
729
730 /* Establish that the iio_dev is a child of the i2c device */
731 indio_dev->name = id->name;
732 indio_dev->dev.parent = &client->dev;
733
734 indio_dev->info = &ad7150_info;
735
736 indio_dev->modes = INDIO_DIRECT_MODE;
737
738 ret = iio_device_register(indio_dev);
739 if (ret)
740 goto error_free_dev;
741 regdone = 1;
742
743 if (client->irq) {
744 ret = request_threaded_irq(client->irq,
745 NULL,
746 &ad7150_event_handler,
747 IRQF_TRIGGER_RISING |
748 IRQF_TRIGGER_FALLING,
749 "ad7150",
750 indio_dev);
751 if (ret)
752 goto error_free_dev;
753 }
754
755 dev_err(&client->dev, "%s capacitive sensor registered, irq: %d\n", id->name, client->irq);
756
757 return 0;
758
759error_free_dev:
760 if (regdone)
761 iio_device_unregister(indio_dev);
762 else
763 iio_free_device(indio_dev);
764error_ret:
765 return ret;
766}
767
768static int __devexit ad7150_remove(struct i2c_client *client)
769{
770 struct iio_dev *indio_dev = i2c_get_clientdata(client);
771
772 if (client->irq)
773 free_irq(client->irq, indio_dev);
774 iio_device_unregister(indio_dev);
775
776 return 0;
777}
778
779static const struct i2c_device_id ad7150_id[] = {
780 { "ad7150", 0 },
781 { "ad7151", 0 },
782 { "ad7156", 0 },
783 {}
784};
785
786MODULE_DEVICE_TABLE(i2c, ad7150_id);
787
788static struct i2c_driver ad7150_driver = {
789 .driver = {
790 .name = "ad7150",
791 },
792 .probe = ad7150_probe,
793 .remove = __devexit_p(ad7150_remove),
794 .id_table = ad7150_id,
795};
796
797static __init int ad7150_init(void)
798{
799 return i2c_add_driver(&ad7150_driver);
800}
801
802static __exit void ad7150_exit(void)
803{
804 i2c_del_driver(&ad7150_driver);
805}
806
807MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
808MODULE_DESCRIPTION("Analog Devices ad7150/1/6 capacitive sensor driver");
809MODULE_LICENSE("GPL v2");
810
811module_init(ad7150_init);
812module_exit(ad7150_exit);
diff --git a/drivers/staging/iio/adc/ad7152.c b/drivers/staging/iio/adc/ad7152.c
new file mode 100644
index 00000000000..21f5f380fb5
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7152.c
@@ -0,0 +1,586 @@
1/*
2 * AD7152 capacitive sensor driver supporting AD7152/3
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/sysfs.h>
14#include <linux/i2c.h>
15
16#include "../iio.h"
17#include "../sysfs.h"
18
19/*
20 * AD7152 registers definition
21 */
22
23#define AD7152_STATUS 0
24#define AD7152_STATUS_RDY1 (1 << 0)
25#define AD7152_STATUS_RDY2 (1 << 1)
26#define AD7152_CH1_DATA_HIGH 1
27#define AD7152_CH1_DATA_LOW 2
28#define AD7152_CH2_DATA_HIGH 3
29#define AD7152_CH2_DATA_LOW 4
30#define AD7152_CH1_OFFS_HIGH 5
31#define AD7152_CH1_OFFS_LOW 6
32#define AD7152_CH2_OFFS_HIGH 7
33#define AD7152_CH2_OFFS_LOW 8
34#define AD7152_CH1_GAIN_HIGH 9
35#define AD7152_CH1_GAIN_LOW 10
36#define AD7152_CH1_SETUP 11
37#define AD7152_CH2_GAIN_HIGH 12
38#define AD7152_CH2_GAIN_LOW 13
39#define AD7152_CH2_SETUP 14
40#define AD7152_CFG 15
41#define AD7152_RESEVERD 16
42#define AD7152_CAPDAC_POS 17
43#define AD7152_CAPDAC_NEG 18
44#define AD7152_CFG2 26
45
46#define AD7152_MAX_CONV_MODE 6
47
48/*
49 * struct ad7152_chip_info - chip specifc information
50 */
51
52struct ad7152_chip_info {
53 struct i2c_client *client;
54 u16 ch1_offset; /* Channel 1 offset calibration coefficient */
55 u16 ch1_gain; /* Channel 1 gain coefficient */
56 u8 ch1_setup;
57 u16 ch2_offset; /* Channel 2 offset calibration coefficient */
58 u16 ch2_gain; /* Channel 1 gain coefficient */
59 u8 ch2_setup;
60 u8 filter_rate_setup; /* Capacitive channel digital filter setup; conversion time/update rate setup per channel */
61 char *conversion_mode;
62};
63
64struct ad7152_conversion_mode {
65 char *name;
66 u8 reg_cfg;
67};
68
69static struct ad7152_conversion_mode
70ad7152_conv_mode_table[AD7152_MAX_CONV_MODE] = {
71 { "idle", 0 },
72 { "continuous-conversion", 1 },
73 { "single-conversion", 2 },
74 { "power-down", 3 },
75 { "offset-calibration", 5 },
76 { "gain-calibration", 6 },
77};
78
79/*
80 * ad7152 register access by I2C
81 */
82
83static int ad7152_i2c_read(struct ad7152_chip_info *chip, u8 reg, u8 *data, int len)
84{
85 struct i2c_client *client = chip->client;
86 int ret;
87
88 ret = i2c_master_send(client, &reg, 1);
89 if (ret < 0) {
90 dev_err(&client->dev, "I2C write error\n");
91 return ret;
92 }
93
94 ret = i2c_master_recv(client, data, len);
95 if (ret < 0) {
96 dev_err(&client->dev, "I2C read error\n");
97 }
98
99 return ret;
100}
101
102static int ad7152_i2c_write(struct ad7152_chip_info *chip, u8 reg, u8 data)
103{
104 struct i2c_client *client = chip->client;
105 int ret;
106
107 u8 tx[2] = {
108 reg,
109 data,
110 };
111
112 ret = i2c_master_send(client, tx, 2);
113 if (ret < 0)
114 dev_err(&client->dev, "I2C write error\n");
115
116 return ret;
117}
118
119/*
120 * sysfs nodes
121 */
122
123#define IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(_show) \
124 IIO_DEVICE_ATTR(available_conversion_modes, S_IRUGO, _show, NULL, 0)
125#define IIO_DEV_ATTR_CONVERSION_MODE(_mode, _show, _store) \
126 IIO_DEVICE_ATTR(conversion_mode, _mode, _show, _store, 0)
127#define IIO_DEV_ATTR_CH1_OFFSET(_mode, _show, _store) \
128 IIO_DEVICE_ATTR(ch1_offset, _mode, _show, _store, 0)
129#define IIO_DEV_ATTR_CH2_OFFSET(_mode, _show, _store) \
130 IIO_DEVICE_ATTR(ch2_offset, _mode, _show, _store, 0)
131#define IIO_DEV_ATTR_CH1_GAIN(_mode, _show, _store) \
132 IIO_DEVICE_ATTR(ch1_gain, _mode, _show, _store, 0)
133#define IIO_DEV_ATTR_CH2_GAIN(_mode, _show, _store) \
134 IIO_DEVICE_ATTR(ch2_gain, _mode, _show, _store, 0)
135#define IIO_DEV_ATTR_CH1_VALUE(_show) \
136 IIO_DEVICE_ATTR(ch1_value, S_IRUGO, _show, NULL, 0)
137#define IIO_DEV_ATTR_CH2_VALUE(_show) \
138 IIO_DEVICE_ATTR(ch2_value, S_IRUGO, _show, NULL, 0)
139#define IIO_DEV_ATTR_CH1_SETUP(_mode, _show, _store) \
140 IIO_DEVICE_ATTR(ch1_setup, _mode, _show, _store, 0)
141#define IIO_DEV_ATTR_CH2_SETUP(_mode, _show, _store) \
142 IIO_DEVICE_ATTR(ch2_setup, _mode, _show, _store, 0)
143#define IIO_DEV_ATTR_FILTER_RATE_SETUP(_mode, _show, _store) \
144 IIO_DEVICE_ATTR(filter_rate_setup, _mode, _show, _store, 0)
145
146static ssize_t ad7152_show_conversion_modes(struct device *dev,
147 struct device_attribute *attr,
148 char *buf)
149{
150 int i;
151 int len = 0;
152
153 for (i = 0; i < AD7152_MAX_CONV_MODE; i++)
154 len += sprintf(buf + len, "%s ", ad7152_conv_mode_table[i].name);
155
156 len += sprintf(buf + len, "\n");
157
158 return len;
159}
160
161static IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(ad7152_show_conversion_modes);
162
163static ssize_t ad7152_show_ch1_value(struct device *dev,
164 struct device_attribute *attr,
165 char *buf)
166{
167 struct iio_dev *dev_info = dev_get_drvdata(dev);
168 struct ad7152_chip_info *chip = iio_priv(dev_info);
169 u8 data[2];
170
171 ad7152_i2c_read(chip, AD7152_CH1_DATA_HIGH, data, 2);
172 return sprintf(buf, "%d\n", ((int)data[0] << 8) | data[1]);
173}
174
175static IIO_DEV_ATTR_CH1_VALUE(ad7152_show_ch1_value);
176
177static ssize_t ad7152_show_ch2_value(struct device *dev,
178 struct device_attribute *attr,
179 char *buf)
180{
181 struct iio_dev *dev_info = dev_get_drvdata(dev);
182 struct ad7152_chip_info *chip = iio_priv(dev_info);
183 u8 data[2];
184
185 ad7152_i2c_read(chip, AD7152_CH2_DATA_HIGH, data, 2);
186 return sprintf(buf, "%d\n", ((int)data[0] << 8) | data[1]);
187}
188
189static IIO_DEV_ATTR_CH2_VALUE(ad7152_show_ch2_value);
190
191static ssize_t ad7152_show_conversion_mode(struct device *dev,
192 struct device_attribute *attr,
193 char *buf)
194{
195 struct iio_dev *dev_info = dev_get_drvdata(dev);
196 struct ad7152_chip_info *chip = iio_priv(dev_info);
197
198 return sprintf(buf, "%s\n", chip->conversion_mode);
199}
200
201static ssize_t ad7152_store_conversion_mode(struct device *dev,
202 struct device_attribute *attr,
203 const char *buf,
204 size_t len)
205{
206 struct iio_dev *dev_info = dev_get_drvdata(dev);
207 struct ad7152_chip_info *chip = iio_priv(dev_info);
208 u8 cfg;
209 int i;
210
211 ad7152_i2c_read(chip, AD7152_CFG, &cfg, 1);
212
213 for (i = 0; i < AD7152_MAX_CONV_MODE; i++)
214 if (strncmp(buf, ad7152_conv_mode_table[i].name,
215 strlen(ad7152_conv_mode_table[i].name) - 1) == 0) {
216 chip->conversion_mode = ad7152_conv_mode_table[i].name;
217 cfg |= 0x18 | ad7152_conv_mode_table[i].reg_cfg;
218 ad7152_i2c_write(chip, AD7152_CFG, cfg);
219 return len;
220 }
221
222 dev_err(dev, "not supported conversion mode\n");
223
224 return -EINVAL;
225}
226
227static IIO_DEV_ATTR_CONVERSION_MODE(S_IRUGO | S_IWUSR,
228 ad7152_show_conversion_mode,
229 ad7152_store_conversion_mode);
230
231static ssize_t ad7152_show_ch1_offset(struct device *dev,
232 struct device_attribute *attr,
233 char *buf)
234{
235 struct iio_dev *dev_info = dev_get_drvdata(dev);
236 struct ad7152_chip_info *chip = iio_priv(dev_info);
237
238 return sprintf(buf, "%d\n", chip->ch1_offset);
239}
240
241static ssize_t ad7152_store_ch1_offset(struct device *dev,
242 struct device_attribute *attr,
243 const char *buf,
244 size_t len)
245{
246 struct iio_dev *dev_info = dev_get_drvdata(dev);
247 struct ad7152_chip_info *chip = iio_priv(dev_info);
248 unsigned long data;
249 int ret;
250
251 ret = strict_strtoul(buf, 10, &data);
252
253 if ((!ret) && (data < 0x10000)) {
254 ad7152_i2c_write(chip, AD7152_CH1_OFFS_HIGH, data >> 8);
255 ad7152_i2c_write(chip, AD7152_CH1_OFFS_LOW, data);
256 chip->ch1_offset = data;
257 return len;
258 }
259
260 return -EINVAL;
261}
262
263static IIO_DEV_ATTR_CH1_OFFSET(S_IRUGO | S_IWUSR,
264 ad7152_show_ch1_offset,
265 ad7152_store_ch1_offset);
266
267static ssize_t ad7152_show_ch2_offset(struct device *dev,
268 struct device_attribute *attr,
269 char *buf)
270{
271 struct iio_dev *dev_info = dev_get_drvdata(dev);
272 struct ad7152_chip_info *chip = iio_priv(dev_info);
273
274 return sprintf(buf, "%d\n", chip->ch2_offset);
275}
276
277static ssize_t ad7152_store_ch2_offset(struct device *dev,
278 struct device_attribute *attr,
279 const char *buf,
280 size_t len)
281{
282 struct iio_dev *dev_info = dev_get_drvdata(dev);
283 struct ad7152_chip_info *chip = iio_priv(dev_info);
284 unsigned long data;
285 int ret;
286
287 ret = strict_strtoul(buf, 10, &data);
288
289 if ((!ret) && (data < 0x10000)) {
290 ad7152_i2c_write(chip, AD7152_CH2_OFFS_HIGH, data >> 8);
291 ad7152_i2c_write(chip, AD7152_CH2_OFFS_LOW, data);
292 chip->ch2_offset = data;
293 return len;
294 }
295
296 return -EINVAL;
297}
298
299static IIO_DEV_ATTR_CH2_OFFSET(S_IRUGO | S_IWUSR,
300 ad7152_show_ch2_offset,
301 ad7152_store_ch2_offset);
302
303static ssize_t ad7152_show_ch1_gain(struct device *dev,
304 struct device_attribute *attr,
305 char *buf)
306{
307 struct iio_dev *dev_info = dev_get_drvdata(dev);
308 struct ad7152_chip_info *chip = iio_priv(dev_info);
309
310 return sprintf(buf, "%d\n", chip->ch1_gain);
311}
312
313static ssize_t ad7152_store_ch1_gain(struct device *dev,
314 struct device_attribute *attr,
315 const char *buf,
316 size_t len)
317{
318 struct iio_dev *dev_info = dev_get_drvdata(dev);
319 struct ad7152_chip_info *chip = iio_priv(dev_info);
320 unsigned long data;
321 int ret;
322
323 ret = strict_strtoul(buf, 10, &data);
324
325 if ((!ret) && (data < 0x10000)) {
326 ad7152_i2c_write(chip, AD7152_CH1_GAIN_HIGH, data >> 8);
327 ad7152_i2c_write(chip, AD7152_CH1_GAIN_LOW, data);
328 chip->ch1_gain = data;
329 return len;
330 }
331
332 return -EINVAL;
333}
334
335static IIO_DEV_ATTR_CH1_GAIN(S_IRUGO | S_IWUSR,
336 ad7152_show_ch1_gain,
337 ad7152_store_ch1_gain);
338
339static ssize_t ad7152_show_ch2_gain(struct device *dev,
340 struct device_attribute *attr,
341 char *buf)
342{
343 struct iio_dev *dev_info = dev_get_drvdata(dev);
344 struct ad7152_chip_info *chip = iio_priv(dev_info);
345
346 return sprintf(buf, "%d\n", chip->ch2_gain);
347}
348
349static ssize_t ad7152_store_ch2_gain(struct device *dev,
350 struct device_attribute *attr,
351 const char *buf,
352 size_t len)
353{
354 struct iio_dev *dev_info = dev_get_drvdata(dev);
355 struct ad7152_chip_info *chip = iio_priv(dev_info);
356 unsigned long data;
357 int ret;
358
359 ret = strict_strtoul(buf, 10, &data);
360
361 if ((!ret) && (data < 0x10000)) {
362 ad7152_i2c_write(chip, AD7152_CH2_GAIN_HIGH, data >> 8);
363 ad7152_i2c_write(chip, AD7152_CH2_GAIN_LOW, data);
364 chip->ch2_gain = data;
365 return len;
366 }
367
368 return -EINVAL;
369}
370
371static IIO_DEV_ATTR_CH2_GAIN(S_IRUGO | S_IWUSR,
372 ad7152_show_ch2_gain,
373 ad7152_store_ch2_gain);
374
375static ssize_t ad7152_show_ch1_setup(struct device *dev,
376 struct device_attribute *attr,
377 char *buf)
378{
379 struct iio_dev *dev_info = dev_get_drvdata(dev);
380 struct ad7152_chip_info *chip = iio_priv(dev_info);
381
382 return sprintf(buf, "0x%02x\n", chip->ch1_setup);
383}
384
385static ssize_t ad7152_store_ch1_setup(struct device *dev,
386 struct device_attribute *attr,
387 const char *buf,
388 size_t len)
389{
390 struct iio_dev *dev_info = dev_get_drvdata(dev);
391 struct ad7152_chip_info *chip = iio_priv(dev_info);
392 unsigned long data;
393 int ret;
394
395 ret = strict_strtoul(buf, 10, &data);
396
397 if ((!ret) && (data < 0x100)) {
398 ad7152_i2c_write(chip, AD7152_CH1_SETUP, data);
399 chip->ch1_setup = data;
400 return len;
401 }
402
403 return -EINVAL;
404}
405
406static IIO_DEV_ATTR_CH1_SETUP(S_IRUGO | S_IWUSR,
407 ad7152_show_ch1_setup,
408 ad7152_store_ch1_setup);
409
410static ssize_t ad7152_show_ch2_setup(struct device *dev,
411 struct device_attribute *attr,
412 char *buf)
413{
414 struct iio_dev *dev_info = dev_get_drvdata(dev);
415 struct ad7152_chip_info *chip = iio_priv(dev_info);
416
417 return sprintf(buf, "0x%02x\n", chip->ch2_setup);
418}
419
420static ssize_t ad7152_store_ch2_setup(struct device *dev,
421 struct device_attribute *attr,
422 const char *buf,
423 size_t len)
424{
425 struct iio_dev *dev_info = dev_get_drvdata(dev);
426 struct ad7152_chip_info *chip = iio_priv(dev_info);
427 unsigned long data;
428 int ret;
429
430 ret = strict_strtoul(buf, 10, &data);
431
432 if ((!ret) && (data < 0x100)) {
433 ad7152_i2c_write(chip, AD7152_CH2_SETUP, data);
434 chip->ch2_setup = data;
435 return len;
436 }
437
438 return -EINVAL;
439}
440
441static IIO_DEV_ATTR_CH2_SETUP(S_IRUGO | S_IWUSR,
442 ad7152_show_ch2_setup,
443 ad7152_store_ch2_setup);
444
445static ssize_t ad7152_show_filter_rate_setup(struct device *dev,
446 struct device_attribute *attr,
447 char *buf)
448{
449 struct iio_dev *dev_info = dev_get_drvdata(dev);
450 struct ad7152_chip_info *chip = iio_priv(dev_info);
451
452 return sprintf(buf, "0x%02x\n", chip->filter_rate_setup);
453}
454
455static ssize_t ad7152_store_filter_rate_setup(struct device *dev,
456 struct device_attribute *attr,
457 const char *buf,
458 size_t len)
459{
460 struct iio_dev *dev_info = dev_get_drvdata(dev);
461 struct ad7152_chip_info *chip = iio_priv(dev_info);
462 unsigned long data;
463 int ret;
464
465 ret = strict_strtoul(buf, 10, &data);
466
467 if ((!ret) && (data < 0x100)) {
468 ad7152_i2c_write(chip, AD7152_CFG2, data);
469 chip->filter_rate_setup = data;
470 return len;
471 }
472
473 return -EINVAL;
474}
475
476static IIO_DEV_ATTR_FILTER_RATE_SETUP(S_IRUGO | S_IWUSR,
477 ad7152_show_filter_rate_setup,
478 ad7152_store_filter_rate_setup);
479
480static struct attribute *ad7152_attributes[] = {
481 &iio_dev_attr_available_conversion_modes.dev_attr.attr,
482 &iio_dev_attr_conversion_mode.dev_attr.attr,
483 &iio_dev_attr_ch1_gain.dev_attr.attr,
484 &iio_dev_attr_ch2_gain.dev_attr.attr,
485 &iio_dev_attr_ch1_offset.dev_attr.attr,
486 &iio_dev_attr_ch2_offset.dev_attr.attr,
487 &iio_dev_attr_ch1_value.dev_attr.attr,
488 &iio_dev_attr_ch2_value.dev_attr.attr,
489 &iio_dev_attr_ch1_setup.dev_attr.attr,
490 &iio_dev_attr_ch2_setup.dev_attr.attr,
491 &iio_dev_attr_filter_rate_setup.dev_attr.attr,
492 NULL,
493};
494
495static const struct attribute_group ad7152_attribute_group = {
496 .attrs = ad7152_attributes,
497};
498
499static const struct iio_info ad7152_info = {
500 .attrs = &ad7152_attribute_group,
501 .driver_module = THIS_MODULE,
502};
503/*
504 * device probe and remove
505 */
506
507static int __devinit ad7152_probe(struct i2c_client *client,
508 const struct i2c_device_id *id)
509{
510 int ret = 0;
511 struct ad7152_chip_info *chip;
512 struct iio_dev *indio_dev;
513
514 indio_dev = iio_allocate_device(sizeof(*chip));
515 if (indio_dev == NULL) {
516 ret = -ENOMEM;
517 goto error_ret;
518 }
519 chip = iio_priv(indio_dev);
520 /* this is only used for device removal purposes */
521 i2c_set_clientdata(client, indio_dev);
522
523 chip->client = client;
524
525 /* Echipabilish that the iio_dev is a child of the i2c device */
526 indio_dev->name = id->name;
527 indio_dev->dev.parent = &client->dev;
528 indio_dev->info = &ad7152_info;
529 indio_dev->modes = INDIO_DIRECT_MODE;
530
531 ret = iio_device_register(indio_dev);
532 if (ret)
533 goto error_free_dev;
534
535 dev_err(&client->dev, "%s capacitive sensor registered\n", id->name);
536
537 return 0;
538
539error_free_dev:
540 iio_free_device(indio_dev);
541error_ret:
542 return ret;
543}
544
545static int __devexit ad7152_remove(struct i2c_client *client)
546{
547 struct iio_dev *indio_dev = i2c_get_clientdata(client);
548
549 iio_device_unregister(indio_dev);
550
551 return 0;
552}
553
554static const struct i2c_device_id ad7152_id[] = {
555 { "ad7152", 0 },
556 { "ad7153", 0 },
557 {}
558};
559
560MODULE_DEVICE_TABLE(i2c, ad7152_id);
561
562static struct i2c_driver ad7152_driver = {
563 .driver = {
564 .name = "ad7152",
565 },
566 .probe = ad7152_probe,
567 .remove = __devexit_p(ad7152_remove),
568 .id_table = ad7152_id,
569};
570
571static __init int ad7152_init(void)
572{
573 return i2c_add_driver(&ad7152_driver);
574}
575
576static __exit void ad7152_exit(void)
577{
578 i2c_del_driver(&ad7152_driver);
579}
580
581MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
582MODULE_DESCRIPTION("Analog Devices ad7152/3 capacitive sensor driver");
583MODULE_LICENSE("GPL v2");
584
585module_init(ad7152_init);
586module_exit(ad7152_exit);
diff --git a/drivers/staging/iio/adc/ad7298.h b/drivers/staging/iio/adc/ad7298.h
new file mode 100644
index 00000000000..628f5adcf0c
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7298.h
@@ -0,0 +1,76 @@
1/*
2 * AD7298 SPI ADC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#ifndef IIO_ADC_AD7298_H_
10#define IIO_ADC_AD7298_H_
11
12#define AD7298_WRITE (1 << 15) /* write to the control register */
13#define AD7298_REPEAT (1 << 14) /* repeated conversion enable */
14#define AD7298_CH(x) (1 << (13 - (x))) /* channel select */
15#define AD7298_TSENSE (1 << 5) /* temperature conversion enable */
16#define AD7298_EXTREF (1 << 2) /* external reference enable */
17#define AD7298_TAVG (1 << 1) /* temperature sensor averaging enable */
18#define AD7298_PDD (1 << 0) /* partial power down enable */
19
20#define AD7298_MAX_CHAN 8
21#define AD7298_BITS 12
22#define AD7298_STORAGE_BITS 16
23#define AD7298_INTREF_mV 2500
24
25#define AD7298_CH_TEMP 9
26
27#define RES_MASK(bits) ((1 << (bits)) - 1)
28
29/*
30 * TODO: struct ad7298_platform_data needs to go into include/linux/iio
31 */
32
33struct ad7298_platform_data {
34 /* External Vref voltage applied */
35 u16 vref_mv;
36};
37
38struct ad7298_state {
39 struct spi_device *spi;
40 struct regulator *reg;
41 size_t d_size;
42 u16 int_vref_mv;
43 unsigned ext_ref;
44 struct spi_transfer ring_xfer[10];
45 struct spi_transfer scan_single_xfer[3];
46 struct spi_message ring_msg;
47 struct spi_message scan_single_msg;
48 /*
49 * DMA (thus cache coherency maintenance) requires the
50 * transfer buffers to live in their own cache lines.
51 */
52 unsigned short rx_buf[8] ____cacheline_aligned;
53 unsigned short tx_buf[2];
54};
55
56#ifdef CONFIG_IIO_RING_BUFFER
57int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch);
58int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev);
59void ad7298_ring_cleanup(struct iio_dev *indio_dev);
60#else /* CONFIG_IIO_RING_BUFFER */
61static inline int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch)
62{
63 return 0;
64}
65
66static inline int
67ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)
68{
69 return 0;
70}
71
72static inline void ad7298_ring_cleanup(struct iio_dev *indio_dev)
73{
74}
75#endif /* CONFIG_IIO_RING_BUFFER */
76#endif /* IIO_ADC_AD7298_H_ */
diff --git a/drivers/staging/iio/adc/ad7298_core.c b/drivers/staging/iio/adc/ad7298_core.c
new file mode 100644
index 00000000000..b8e4ae29b0b
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7298_core.c
@@ -0,0 +1,299 @@
1/*
2 * AD7298 SPI ADC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/device.h>
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/sysfs.h>
13#include <linux/spi/spi.h>
14#include <linux/regulator/consumer.h>
15#include <linux/err.h>
16#include <linux/delay.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20#include "../ring_generic.h"
21#include "adc.h"
22
23#include "ad7298.h"
24
25static struct iio_chan_spec ad7298_channels[] = {
26 IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
27 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
28 9, AD7298_CH_TEMP, IIO_ST('s', 32, 32, 0), 0),
29 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
30 (1 << IIO_CHAN_INFO_SCALE_SHARED),
31 0, 0, IIO_ST('u', 12, 16, 0), 0),
32 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
33 (1 << IIO_CHAN_INFO_SCALE_SHARED),
34 1, 1, IIO_ST('u', 12, 16, 0), 0),
35 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
36 (1 << IIO_CHAN_INFO_SCALE_SHARED),
37 2, 2, IIO_ST('u', 12, 16, 0), 0),
38 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
39 (1 << IIO_CHAN_INFO_SCALE_SHARED),
40 3, 3, IIO_ST('u', 12, 16, 0), 0),
41 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
42 (1 << IIO_CHAN_INFO_SCALE_SHARED),
43 4, 4, IIO_ST('u', 12, 16, 0), 0),
44 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
45 (1 << IIO_CHAN_INFO_SCALE_SHARED),
46 5, 5, IIO_ST('u', 12, 16, 0), 0),
47 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
48 (1 << IIO_CHAN_INFO_SCALE_SHARED),
49 6, 6, IIO_ST('u', 12, 16, 0), 0),
50 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
51 (1 << IIO_CHAN_INFO_SCALE_SHARED),
52 7, 7, IIO_ST('u', 12, 16, 0), 0),
53 IIO_CHAN_SOFT_TIMESTAMP(8),
54};
55
56static int ad7298_scan_direct(struct ad7298_state *st, unsigned ch)
57{
58 int ret;
59 st->tx_buf[0] = cpu_to_be16(AD7298_WRITE | st->ext_ref |
60 (AD7298_CH(0) >> ch));
61
62 ret = spi_sync(st->spi, &st->scan_single_msg);
63 if (ret)
64 return ret;
65
66 return be16_to_cpu(st->rx_buf[0]);
67}
68
69static int ad7298_scan_temp(struct ad7298_state *st, int *val)
70{
71 int tmp, ret;
72
73 tmp = cpu_to_be16(AD7298_WRITE | AD7298_TSENSE |
74 AD7298_TAVG | st->ext_ref);
75
76 ret = spi_write(st->spi, (u8 *)&tmp, 2);
77 if (ret)
78 return ret;
79
80 tmp = 0;
81
82 ret = spi_write(st->spi, (u8 *)&tmp, 2);
83 if (ret)
84 return ret;
85
86 usleep_range(101, 1000); /* sleep > 100us */
87
88 ret = spi_read(st->spi, (u8 *)&tmp, 2);
89 if (ret)
90 return ret;
91
92 tmp = be16_to_cpu(tmp) & RES_MASK(AD7298_BITS);
93
94 /*
95 * One LSB of the ADC corresponds to 0.25 deg C.
96 * The temperature reading is in 12-bit twos complement format
97 */
98
99 if (tmp & (1 << (AD7298_BITS - 1))) {
100 tmp = (4096 - tmp) * 250;
101 tmp -= (2 * tmp);
102
103 } else {
104 tmp *= 250; /* temperature in milli degrees Celsius */
105 }
106
107 *val = tmp;
108
109 return 0;
110}
111
112static int ad7298_read_raw(struct iio_dev *dev_info,
113 struct iio_chan_spec const *chan,
114 int *val,
115 int *val2,
116 long m)
117{
118 int ret;
119 struct ad7298_state *st = iio_priv(dev_info);
120 unsigned int scale_uv;
121
122 switch (m) {
123 case 0:
124 mutex_lock(&dev_info->mlock);
125 if (iio_ring_enabled(dev_info)) {
126 if (chan->address == AD7298_CH_TEMP)
127 ret = -ENODEV;
128 else
129 ret = ad7298_scan_from_ring(dev_info,
130 chan->address);
131 } else {
132 if (chan->address == AD7298_CH_TEMP)
133 ret = ad7298_scan_temp(st, val);
134 else
135 ret = ad7298_scan_direct(st, chan->address);
136 }
137 mutex_unlock(&dev_info->mlock);
138
139 if (ret < 0)
140 return ret;
141
142 if (chan->address != AD7298_CH_TEMP)
143 *val = ret & RES_MASK(AD7298_BITS);
144
145 return IIO_VAL_INT;
146 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
147 scale_uv = (st->int_vref_mv * 1000) >> AD7298_BITS;
148 *val = scale_uv / 1000;
149 *val2 = (scale_uv % 1000) * 1000;
150 return IIO_VAL_INT_PLUS_MICRO;
151 case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
152 *val = 1;
153 *val2 = 0;
154 return IIO_VAL_INT_PLUS_MICRO;
155 }
156 return -EINVAL;
157}
158
159static const struct iio_info ad7298_info = {
160 .read_raw = &ad7298_read_raw,
161 .driver_module = THIS_MODULE,
162};
163
164static int __devinit ad7298_probe(struct spi_device *spi)
165{
166 struct ad7298_platform_data *pdata = spi->dev.platform_data;
167 struct ad7298_state *st;
168 int ret, regdone = 0;
169 struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
170
171 if (indio_dev == NULL)
172 return -ENOMEM;
173
174 st = iio_priv(indio_dev);
175
176 st->reg = regulator_get(&spi->dev, "vcc");
177 if (!IS_ERR(st->reg)) {
178 ret = regulator_enable(st->reg);
179 if (ret)
180 goto error_put_reg;
181 }
182
183 spi_set_drvdata(spi, indio_dev);
184
185 st->spi = spi;
186
187 indio_dev->name = spi_get_device_id(spi)->name;
188 indio_dev->dev.parent = &spi->dev;
189 indio_dev->modes = INDIO_DIRECT_MODE;
190 indio_dev->channels = ad7298_channels;
191 indio_dev->num_channels = ARRAY_SIZE(ad7298_channels);
192 indio_dev->info = &ad7298_info;
193
194 /* Setup default message */
195
196 st->scan_single_xfer[0].tx_buf = &st->tx_buf[0];
197 st->scan_single_xfer[0].len = 2;
198 st->scan_single_xfer[0].cs_change = 1;
199 st->scan_single_xfer[1].tx_buf = &st->tx_buf[1];
200 st->scan_single_xfer[1].len = 2;
201 st->scan_single_xfer[1].cs_change = 1;
202 st->scan_single_xfer[2].rx_buf = &st->rx_buf[0];
203 st->scan_single_xfer[2].len = 2;
204
205 spi_message_init(&st->scan_single_msg);
206 spi_message_add_tail(&st->scan_single_xfer[0], &st->scan_single_msg);
207 spi_message_add_tail(&st->scan_single_xfer[1], &st->scan_single_msg);
208 spi_message_add_tail(&st->scan_single_xfer[2], &st->scan_single_msg);
209
210 if (pdata && pdata->vref_mv) {
211 st->int_vref_mv = pdata->vref_mv;
212 st->ext_ref = AD7298_EXTREF;
213 } else {
214 st->int_vref_mv = AD7298_INTREF_mV;
215 }
216
217 ret = ad7298_register_ring_funcs_and_init(indio_dev);
218 if (ret)
219 goto error_disable_reg;
220
221 ret = iio_device_register(indio_dev);
222 if (ret)
223 goto error_disable_reg;
224 regdone = 1;
225
226 ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
227 &ad7298_channels[1], /* skip temp0 */
228 ARRAY_SIZE(ad7298_channels) - 1);
229 if (ret)
230 goto error_cleanup_ring;
231
232 return 0;
233
234error_cleanup_ring:
235 ad7298_ring_cleanup(indio_dev);
236error_disable_reg:
237 if (!IS_ERR(st->reg))
238 regulator_disable(st->reg);
239error_put_reg:
240 if (!IS_ERR(st->reg))
241 regulator_put(st->reg);
242
243 if (regdone)
244 iio_device_unregister(indio_dev);
245 else
246 iio_free_device(indio_dev);
247
248 return ret;
249}
250
251static int __devexit ad7298_remove(struct spi_device *spi)
252{
253 struct iio_dev *indio_dev = spi_get_drvdata(spi);
254 struct ad7298_state *st = iio_priv(indio_dev);
255
256 iio_ring_buffer_unregister(indio_dev->ring);
257 ad7298_ring_cleanup(indio_dev);
258 iio_device_unregister(indio_dev);
259 if (!IS_ERR(st->reg)) {
260 regulator_disable(st->reg);
261 regulator_put(st->reg);
262 }
263 iio_device_unregister(indio_dev);
264
265 return 0;
266}
267
268static const struct spi_device_id ad7298_id[] = {
269 {"ad7298", 0},
270 {}
271};
272
273static struct spi_driver ad7298_driver = {
274 .driver = {
275 .name = "ad7298",
276 .bus = &spi_bus_type,
277 .owner = THIS_MODULE,
278 },
279 .probe = ad7298_probe,
280 .remove = __devexit_p(ad7298_remove),
281 .id_table = ad7298_id,
282};
283
284static int __init ad7298_init(void)
285{
286 return spi_register_driver(&ad7298_driver);
287}
288module_init(ad7298_init);
289
290static void __exit ad7298_exit(void)
291{
292 spi_unregister_driver(&ad7298_driver);
293}
294module_exit(ad7298_exit);
295
296MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
297MODULE_DESCRIPTION("Analog Devices AD7298 ADC");
298MODULE_LICENSE("GPL v2");
299MODULE_ALIAS("spi:ad7298");
diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c
new file mode 100644
index 00000000000..a04c0335262
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7298_ring.c
@@ -0,0 +1,202 @@
1/*
2 * AD7298 SPI ADC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/sysfs.h>
14#include <linux/spi/spi.h>
15
16#include "../iio.h"
17#include "../ring_generic.h"
18#include "../ring_sw.h"
19#include "../trigger.h"
20#include "../sysfs.h"
21
22#include "ad7298.h"
23
24int ad7298_scan_from_ring(struct iio_dev *dev_info, long ch)
25{
26 struct iio_ring_buffer *ring = dev_info->ring;
27 int ret;
28 u16 *ring_data;
29
30 if (!(ring->scan_mask & (1 << ch))) {
31 ret = -EBUSY;
32 goto error_ret;
33 }
34
35 ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
36 GFP_KERNEL);
37 if (ring_data == NULL) {
38 ret = -ENOMEM;
39 goto error_ret;
40 }
41 ret = ring->access->read_last(ring, (u8 *) ring_data);
42 if (ret)
43 goto error_free_ring_data;
44
45 ret = be16_to_cpu(ring_data[ch]);
46
47error_free_ring_data:
48 kfree(ring_data);
49error_ret:
50 return ret;
51}
52
53/**
54 * ad7298_ring_preenable() setup the parameters of the ring before enabling
55 *
56 * The complex nature of the setting of the number of bytes per datum is due
57 * to this driver currently ensuring that the timestamp is stored at an 8
58 * byte boundary.
59 **/
60static int ad7298_ring_preenable(struct iio_dev *indio_dev)
61{
62 struct ad7298_state *st = iio_priv(indio_dev);
63 struct iio_ring_buffer *ring = indio_dev->ring;
64 size_t d_size;
65 int i, m;
66 unsigned short command;
67
68 d_size = ring->scan_count * (AD7298_STORAGE_BITS / 8);
69
70 if (ring->scan_timestamp) {
71 d_size += sizeof(s64);
72
73 if (d_size % sizeof(s64))
74 d_size += sizeof(s64) - (d_size % sizeof(s64));
75 }
76
77 if (ring->access->set_bytes_per_datum)
78 ring->access->set_bytes_per_datum(ring, d_size);
79
80 st->d_size = d_size;
81
82 command = AD7298_WRITE | st->ext_ref;
83
84 for (i = 0, m = AD7298_CH(0); i < AD7298_MAX_CHAN; i++, m >>= 1)
85 if (ring->scan_mask & (1 << i))
86 command |= m;
87
88 st->tx_buf[0] = cpu_to_be16(command);
89
90 /* build spi ring message */
91 st->ring_xfer[0].tx_buf = &st->tx_buf[0];
92 st->ring_xfer[0].len = 2;
93 st->ring_xfer[0].cs_change = 1;
94 st->ring_xfer[1].tx_buf = &st->tx_buf[1];
95 st->ring_xfer[1].len = 2;
96 st->ring_xfer[1].cs_change = 1;
97
98 spi_message_init(&st->ring_msg);
99 spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg);
100 spi_message_add_tail(&st->ring_xfer[1], &st->ring_msg);
101
102 for (i = 0; i < ring->scan_count; i++) {
103 st->ring_xfer[i + 2].rx_buf = &st->rx_buf[i];
104 st->ring_xfer[i + 2].len = 2;
105 st->ring_xfer[i + 2].cs_change = 1;
106 spi_message_add_tail(&st->ring_xfer[i + 2], &st->ring_msg);
107 }
108 /* make sure last transfer cs_change is not set */
109 st->ring_xfer[i + 1].cs_change = 0;
110
111 return 0;
112}
113
114/**
115 * ad7298_trigger_handler() bh of trigger launched polling to ring buffer
116 *
117 * Currently there is no option in this driver to disable the saving of
118 * timestamps within the ring.
119 **/
120static irqreturn_t ad7298_trigger_handler(int irq, void *p)
121{
122 struct iio_poll_func *pf = p;
123 struct iio_dev *indio_dev = pf->private_data;
124 struct ad7298_state *st = iio_priv(indio_dev);
125 struct iio_ring_buffer *ring = indio_dev->ring;
126 s64 time_ns;
127 __u16 buf[16];
128 int b_sent, i;
129
130 b_sent = spi_sync(st->spi, &st->ring_msg);
131 if (b_sent)
132 return b_sent;
133
134 if (ring->scan_timestamp) {
135 time_ns = iio_get_time_ns();
136 memcpy((u8 *)buf + st->d_size - sizeof(s64),
137 &time_ns, sizeof(time_ns));
138 }
139
140 for (i = 0; i < ring->scan_count; i++)
141 buf[i] = be16_to_cpu(st->rx_buf[i]);
142
143 indio_dev->ring->access->store_to(ring, (u8 *)buf, time_ns);
144 iio_trigger_notify_done(indio_dev->trig);
145
146 return IRQ_HANDLED;
147}
148
149static const struct iio_ring_setup_ops ad7298_ring_setup_ops = {
150 .preenable = &ad7298_ring_preenable,
151 .postenable = &iio_triggered_ring_postenable,
152 .predisable = &iio_triggered_ring_predisable,
153};
154
155int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)
156{
157 int ret;
158
159 indio_dev->ring = iio_sw_rb_allocate(indio_dev);
160 if (!indio_dev->ring) {
161 ret = -ENOMEM;
162 goto error_ret;
163 }
164 /* Effectively select the ring buffer implementation */
165 indio_dev->ring->access = &ring_sw_access_funcs;
166
167 indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
168 &ad7298_trigger_handler,
169 IRQF_ONESHOT,
170 indio_dev,
171 "ad7298_consumer%d",
172 indio_dev->id);
173
174 if (indio_dev->pollfunc == NULL) {
175 ret = -ENOMEM;
176 goto error_deallocate_sw_rb;
177 }
178
179 /* Ring buffer functions - here trigger setup related */
180 indio_dev->ring->setup_ops = &ad7298_ring_setup_ops;
181 indio_dev->ring->scan_timestamp = true;
182
183 /* Flag that polled ring buffering is possible */
184 indio_dev->modes |= INDIO_RING_TRIGGERED;
185 return 0;
186
187error_deallocate_sw_rb:
188 iio_sw_rb_free(indio_dev->ring);
189error_ret:
190 return ret;
191}
192
193void ad7298_ring_cleanup(struct iio_dev *indio_dev)
194{
195 if (indio_dev->trig) {
196 iio_put_trigger(indio_dev->trig);
197 iio_trigger_dettach_poll_func(indio_dev->trig,
198 indio_dev->pollfunc);
199 }
200 iio_dealloc_pollfunc(indio_dev->pollfunc);
201 iio_sw_rb_free(indio_dev->ring);
202}
diff --git a/drivers/staging/iio/adc/ad7314.c b/drivers/staging/iio/adc/ad7314.c
new file mode 100644
index 00000000000..9070d9cac72
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7314.c
@@ -0,0 +1,281 @@
1/*
2 * AD7314 digital temperature sensor driver for AD7314, ADT7301 and ADT7302
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/device.h>
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/sysfs.h>
13#include <linux/spi/spi.h>
14
15#include "../iio.h"
16#include "../sysfs.h"
17
18/*
19 * AD7314 power mode
20 */
21#define AD7314_PD 0x2000
22
23/*
24 * AD7314 temperature masks
25 */
26#define AD7314_TEMP_SIGN 0x200
27#define AD7314_TEMP_MASK 0x7FE0
28#define AD7314_TEMP_OFFSET 5
29#define AD7314_TEMP_FLOAT_OFFSET 2
30#define AD7314_TEMP_FLOAT_MASK 0x3
31
32/*
33 * ADT7301 and ADT7302 temperature masks
34 */
35#define ADT7301_TEMP_SIGN 0x2000
36#define ADT7301_TEMP_MASK 0x2FFF
37#define ADT7301_TEMP_FLOAT_OFFSET 5
38#define ADT7301_TEMP_FLOAT_MASK 0x1F
39
40/*
41 * struct ad7314_chip_info - chip specifc information
42 */
43
44struct ad7314_chip_info {
45 struct spi_device *spi_dev;
46 s64 last_timestamp;
47 u8 mode;
48};
49
50/*
51 * ad7314 register access by SPI
52 */
53
54static int ad7314_spi_read(struct ad7314_chip_info *chip, u16 *data)
55{
56 struct spi_device *spi_dev = chip->spi_dev;
57 int ret = 0;
58 u16 value;
59
60 ret = spi_read(spi_dev, (u8 *)&value, sizeof(value));
61 if (ret < 0) {
62 dev_err(&spi_dev->dev, "SPI read error\n");
63 return ret;
64 }
65
66 *data = be16_to_cpu((u16)value);
67
68 return ret;
69}
70
71static int ad7314_spi_write(struct ad7314_chip_info *chip, u16 data)
72{
73 struct spi_device *spi_dev = chip->spi_dev;
74 int ret = 0;
75 u16 value = cpu_to_be16(data);
76
77 ret = spi_write(spi_dev, (u8 *)&value, sizeof(value));
78 if (ret < 0)
79 dev_err(&spi_dev->dev, "SPI write error\n");
80
81 return ret;
82}
83
84static ssize_t ad7314_show_mode(struct device *dev,
85 struct device_attribute *attr,
86 char *buf)
87{
88 struct iio_dev *dev_info = dev_get_drvdata(dev);
89 struct ad7314_chip_info *chip = iio_priv(dev_info);
90
91 if (chip->mode)
92 return sprintf(buf, "power-save\n");
93 else
94 return sprintf(buf, "full\n");
95}
96
97static ssize_t ad7314_store_mode(struct device *dev,
98 struct device_attribute *attr,
99 const char *buf,
100 size_t len)
101{
102 struct iio_dev *dev_info = dev_get_drvdata(dev);
103 struct ad7314_chip_info *chip = iio_priv(dev_info);
104 u16 mode = 0;
105 int ret;
106
107 if (!strcmp(buf, "full"))
108 mode = AD7314_PD;
109
110 ret = ad7314_spi_write(chip, mode);
111 if (ret)
112 return -EIO;
113
114 chip->mode = mode;
115
116 return len;
117}
118
119static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
120 ad7314_show_mode,
121 ad7314_store_mode,
122 0);
123
124static ssize_t ad7314_show_available_modes(struct device *dev,
125 struct device_attribute *attr,
126 char *buf)
127{
128 return sprintf(buf, "full\npower-save\n");
129}
130
131static IIO_DEVICE_ATTR(available_modes, S_IRUGO, ad7314_show_available_modes, NULL, 0);
132
133static ssize_t ad7314_show_temperature(struct device *dev,
134 struct device_attribute *attr,
135 char *buf)
136{
137 struct iio_dev *dev_info = dev_get_drvdata(dev);
138 struct ad7314_chip_info *chip = iio_priv(dev_info);
139 u16 data;
140 char sign = ' ';
141 int ret;
142
143 if (chip->mode) {
144 ret = ad7314_spi_write(chip, 0);
145 if (ret)
146 return -EIO;
147 }
148
149 ret = ad7314_spi_read(chip, &data);
150 if (ret)
151 return -EIO;
152
153 if (chip->mode)
154 ad7314_spi_write(chip, chip->mode);
155
156 if (strcmp(dev_info->name, "ad7314")) {
157 data = (data & AD7314_TEMP_MASK) >>
158 AD7314_TEMP_OFFSET;
159 if (data & AD7314_TEMP_SIGN) {
160 data = (AD7314_TEMP_SIGN << 1) - data;
161 sign = '-';
162 }
163
164 return sprintf(buf, "%c%d.%.2d\n", sign,
165 data >> AD7314_TEMP_FLOAT_OFFSET,
166 (data & AD7314_TEMP_FLOAT_MASK) * 25);
167 } else {
168 data &= ADT7301_TEMP_MASK;
169 if (data & ADT7301_TEMP_SIGN) {
170 data = (ADT7301_TEMP_SIGN << 1) - data;
171 sign = '-';
172 }
173
174 return sprintf(buf, "%c%d.%.5d\n", sign,
175 data >> ADT7301_TEMP_FLOAT_OFFSET,
176 (data & ADT7301_TEMP_FLOAT_MASK) * 3125);
177 }
178}
179
180static IIO_DEVICE_ATTR(temperature, S_IRUGO, ad7314_show_temperature, NULL, 0);
181
182static struct attribute *ad7314_attributes[] = {
183 &iio_dev_attr_available_modes.dev_attr.attr,
184 &iio_dev_attr_mode.dev_attr.attr,
185 &iio_dev_attr_temperature.dev_attr.attr,
186 NULL,
187};
188
189static const struct attribute_group ad7314_attribute_group = {
190 .attrs = ad7314_attributes,
191};
192
193static const struct iio_info ad7314_info = {
194 .attrs = &ad7314_attribute_group,
195 .driver_module = THIS_MODULE,
196};
197/*
198 * device probe and remove
199 */
200
201static int __devinit ad7314_probe(struct spi_device *spi_dev)
202{
203 struct ad7314_chip_info *chip;
204 struct iio_dev *indio_dev;
205 int ret = 0;
206
207 indio_dev = iio_allocate_device(sizeof(*chip));
208 if (indio_dev == NULL) {
209 ret = -ENOMEM;
210 goto error_ret;
211 }
212 chip = iio_priv(indio_dev);
213 /* this is only used for device removal purposes */
214 dev_set_drvdata(&spi_dev->dev, chip);
215
216 chip->spi_dev = spi_dev;
217
218 indio_dev->name = spi_get_device_id(spi_dev)->name;
219 indio_dev->dev.parent = &spi_dev->dev;
220 indio_dev->info = &ad7314_info;
221
222 ret = iio_device_register(indio_dev);
223 if (ret)
224 goto error_free_dev;
225
226 dev_info(&spi_dev->dev, "%s temperature sensor registered.\n",
227 indio_dev->name);
228
229 return 0;
230error_free_dev:
231 iio_free_device(indio_dev);
232error_ret:
233 return ret;
234}
235
236static int __devexit ad7314_remove(struct spi_device *spi_dev)
237{
238 struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev);
239
240 dev_set_drvdata(&spi_dev->dev, NULL);
241 iio_device_unregister(indio_dev);
242 iio_free_device(indio_dev);
243
244 return 0;
245}
246
247static const struct spi_device_id ad7314_id[] = {
248 { "adt7301", 0 },
249 { "adt7302", 0 },
250 { "ad7314", 0 },
251 {}
252};
253
254static struct spi_driver ad7314_driver = {
255 .driver = {
256 .name = "ad7314",
257 .bus = &spi_bus_type,
258 .owner = THIS_MODULE,
259 },
260 .probe = ad7314_probe,
261 .remove = __devexit_p(ad7314_remove),
262 .id_table = ad7314_id,
263};
264
265static __init int ad7314_init(void)
266{
267 return spi_register_driver(&ad7314_driver);
268}
269
270static __exit void ad7314_exit(void)
271{
272 spi_unregister_driver(&ad7314_driver);
273}
274
275MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
276MODULE_DESCRIPTION("Analog Devices AD7314, ADT7301 and ADT7302 digital"
277 " temperature sensor driver");
278MODULE_LICENSE("GPL v2");
279
280module_init(ad7314_init);
281module_exit(ad7314_exit);
diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h
new file mode 100644
index 00000000000..0d44976e846
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7476.h
@@ -0,0 +1,72 @@
1/*
2 * AD7476/5/7/8 (A) SPI ADC driver
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8#ifndef IIO_ADC_AD7476_H_
9#define IIO_ADC_AD7476_H_
10
11#define RES_MASK(bits) ((1 << (bits)) - 1)
12
13/*
14 * TODO: struct ad7476_platform_data needs to go into include/linux/iio
15 */
16
17struct ad7476_platform_data {
18 u16 vref_mv;
19};
20
21struct ad7476_chip_info {
22 u16 int_vref_mv;
23 struct iio_chan_spec channel[2];
24};
25
26struct ad7476_state {
27 struct spi_device *spi;
28 const struct ad7476_chip_info *chip_info;
29 struct regulator *reg;
30 size_t d_size;
31 u16 int_vref_mv;
32 struct spi_transfer xfer;
33 struct spi_message msg;
34 /*
35 * DMA (thus cache coherency maintenance) requires the
36 * transfer buffers to live in their own cache lines.
37 */
38 unsigned char data[2] ____cacheline_aligned;
39};
40
41enum ad7476_supported_device_ids {
42 ID_AD7466,
43 ID_AD7467,
44 ID_AD7468,
45 ID_AD7475,
46 ID_AD7476,
47 ID_AD7477,
48 ID_AD7478,
49 ID_AD7495
50};
51
52#ifdef CONFIG_IIO_RING_BUFFER
53int ad7476_scan_from_ring(struct iio_dev *indio_dev);
54int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev);
55void ad7476_ring_cleanup(struct iio_dev *indio_dev);
56#else /* CONFIG_IIO_RING_BUFFER */
57static inline int ad7476_scan_from_ring(struct iio_dev *indio_dev)
58{
59 return 0;
60}
61
62static inline int
63ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)
64{
65 return 0;
66}
67
68static inline void ad7476_ring_cleanup(struct iio_dev *indio_dev)
69{
70}
71#endif /* CONFIG_IIO_RING_BUFFER */
72#endif /* IIO_ADC_AD7476_H_ */
diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/staging/iio/adc/ad7476_core.c
new file mode 100644
index 00000000000..c21089894d2
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7476_core.c
@@ -0,0 +1,270 @@
1/*
2 * AD7466/7/8 AD7476/5/7/8 (A) SPI ADC driver
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/device.h>
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/sysfs.h>
13#include <linux/spi/spi.h>
14#include <linux/regulator/consumer.h>
15#include <linux/err.h>
16
17#include "../iio.h"
18#include "../sysfs.h"
19#include "../ring_generic.h"
20#include "adc.h"
21
22#include "ad7476.h"
23
24static int ad7476_scan_direct(struct ad7476_state *st)
25{
26 int ret;
27
28 ret = spi_sync(st->spi, &st->msg);
29 if (ret)
30 return ret;
31
32 return (st->data[0] << 8) | st->data[1];
33}
34
35static int ad7476_read_raw(struct iio_dev *dev_info,
36 struct iio_chan_spec const *chan,
37 int *val,
38 int *val2,
39 long m)
40{
41 int ret;
42 struct ad7476_state *st = iio_priv(dev_info);
43 unsigned int scale_uv;
44
45 switch (m) {
46 case 0:
47 mutex_lock(&dev_info->mlock);
48 if (iio_ring_enabled(dev_info))
49 ret = ad7476_scan_from_ring(dev_info);
50 else
51 ret = ad7476_scan_direct(st);
52 mutex_unlock(&dev_info->mlock);
53
54 if (ret < 0)
55 return ret;
56 *val = (ret >> st->chip_info->channel[0].scan_type.shift) &
57 RES_MASK(st->chip_info->channel[0].scan_type.realbits);
58 return IIO_VAL_INT;
59 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
60 scale_uv = (st->int_vref_mv * 1000)
61 >> st->chip_info->channel[0].scan_type.realbits;
62 *val = scale_uv/1000;
63 *val2 = (scale_uv%1000)*1000;
64 return IIO_VAL_INT_PLUS_MICRO;
65 }
66 return -EINVAL;
67}
68
69static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
70 [ID_AD7466] = {
71 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
72 (1 << IIO_CHAN_INFO_SCALE_SHARED),
73 0, 0, IIO_ST('u', 12, 16, 0), 0),
74 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
75 },
76 [ID_AD7467] = {
77 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
78 (1 << IIO_CHAN_INFO_SCALE_SHARED),
79 0, 0, IIO_ST('u', 10, 16, 2), 0),
80 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
81 },
82 [ID_AD7468] = {
83 .channel[0] = IIO_CHAN(IIO_IN, 0, 1 , 0, NULL, 0, 0,
84 (1 << IIO_CHAN_INFO_SCALE_SHARED),
85 0, 0, IIO_ST('u', 8, 16, 4), 0),
86 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
87 },
88 [ID_AD7475] = {
89 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
90 (1 << IIO_CHAN_INFO_SCALE_SHARED),
91 0, 0, IIO_ST('u', 12, 16, 0), 0),
92 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
93 },
94 [ID_AD7476] = {
95 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
96 (1 << IIO_CHAN_INFO_SCALE_SHARED),
97 0, 0, IIO_ST('u', 12, 16, 0), 0),
98 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
99 },
100 [ID_AD7477] = {
101 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
102 (1 << IIO_CHAN_INFO_SCALE_SHARED),
103 0, 0, IIO_ST('u', 10, 16, 2), 0),
104 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
105 },
106 [ID_AD7478] = {
107 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
108 (1 << IIO_CHAN_INFO_SCALE_SHARED),
109 0, 0, IIO_ST('u', 8, 16, 4), 0),
110 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
111 },
112 [ID_AD7495] = {
113 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
114 (1 << IIO_CHAN_INFO_SCALE_SHARED),
115 0, 0, IIO_ST('u', 12, 16, 0), 0),
116 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
117 .int_vref_mv = 2500,
118 },
119};
120
121static const struct iio_info ad7476_info = {
122 .driver_module = THIS_MODULE,
123 .read_raw = &ad7476_read_raw,
124};
125
126static int __devinit ad7476_probe(struct spi_device *spi)
127{
128 struct ad7476_platform_data *pdata = spi->dev.platform_data;
129 struct ad7476_state *st;
130 struct iio_dev *indio_dev;
131 int ret, voltage_uv = 0;
132 bool reg_done = false;
133 struct regulator *reg;
134
135 indio_dev = iio_allocate_device(sizeof(*st));
136 if (indio_dev == NULL) {
137 ret = -ENOMEM;
138 goto error_ret;
139 }
140 st = iio_priv(indio_dev);
141 reg = regulator_get(&spi->dev, "vcc");
142 if (!IS_ERR(reg)) {
143 ret = regulator_enable(reg);
144 if (ret)
145 goto error_put_reg;
146
147 voltage_uv = regulator_get_voltage(reg);
148 }
149 st->reg = reg;
150 st->chip_info =
151 &ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data];
152
153 if (st->chip_info->int_vref_mv)
154 st->int_vref_mv = st->chip_info->int_vref_mv;
155 else if (pdata && pdata->vref_mv)
156 st->int_vref_mv = pdata->vref_mv;
157 else if (voltage_uv)
158 st->int_vref_mv = voltage_uv / 1000;
159 else
160 dev_warn(&spi->dev, "reference voltage unspecified\n");
161
162 spi_set_drvdata(spi, indio_dev);
163
164 st->spi = spi;
165
166 /* Establish that the iio_dev is a child of the spi device */
167 indio_dev->dev.parent = &spi->dev;
168 indio_dev->name = spi_get_device_id(spi)->name;
169 indio_dev->modes = INDIO_DIRECT_MODE;
170 indio_dev->channels = st->chip_info->channel;
171 indio_dev->num_channels = 2;
172 indio_dev->info = &ad7476_info;
173 /* Setup default message */
174
175 st->xfer.rx_buf = &st->data;
176 st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8;
177
178 spi_message_init(&st->msg);
179 spi_message_add_tail(&st->xfer, &st->msg);
180
181 ret = ad7476_register_ring_funcs_and_init(indio_dev);
182 if (ret)
183 goto error_disable_reg;
184
185 ret = iio_device_register(indio_dev);
186 if (ret)
187 goto error_disable_reg;
188
189 ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
190 st->chip_info->channel,
191 ARRAY_SIZE(st->chip_info->channel));
192 if (ret)
193 goto error_cleanup_ring;
194 return 0;
195
196error_cleanup_ring:
197 ad7476_ring_cleanup(indio_dev);
198 iio_device_unregister(indio_dev);
199error_disable_reg:
200 if (!IS_ERR(reg))
201 regulator_disable(st->reg);
202error_put_reg:
203 if (!IS_ERR(reg))
204 regulator_put(reg);
205 if (!reg_done)
206 iio_free_device(indio_dev);
207error_ret:
208 return ret;
209}
210
211static int ad7476_remove(struct spi_device *spi)
212{
213 struct iio_dev *indio_dev = spi_get_drvdata(spi);
214 struct ad7476_state *st = iio_priv(indio_dev);
215 /* copy needed as st will have been freed */
216 struct regulator *reg = st->reg;
217
218 iio_ring_buffer_unregister(indio_dev->ring);
219 ad7476_ring_cleanup(indio_dev);
220 iio_device_unregister(indio_dev);
221 if (!IS_ERR(reg)) {
222 regulator_disable(reg);
223 regulator_put(reg);
224 }
225
226 return 0;
227}
228
229static const struct spi_device_id ad7476_id[] = {
230 {"ad7466", ID_AD7466},
231 {"ad7467", ID_AD7467},
232 {"ad7468", ID_AD7468},
233 {"ad7475", ID_AD7475},
234 {"ad7476", ID_AD7476},
235 {"ad7476a", ID_AD7476},
236 {"ad7477", ID_AD7477},
237 {"ad7477a", ID_AD7477},
238 {"ad7478", ID_AD7478},
239 {"ad7478a", ID_AD7478},
240 {"ad7495", ID_AD7495},
241 {}
242};
243
244static struct spi_driver ad7476_driver = {
245 .driver = {
246 .name = "ad7476",
247 .bus = &spi_bus_type,
248 .owner = THIS_MODULE,
249 },
250 .probe = ad7476_probe,
251 .remove = __devexit_p(ad7476_remove),
252 .id_table = ad7476_id,
253};
254
255static int __init ad7476_init(void)
256{
257 return spi_register_driver(&ad7476_driver);
258}
259module_init(ad7476_init);
260
261static void __exit ad7476_exit(void)
262{
263 spi_unregister_driver(&ad7476_driver);
264}
265module_exit(ad7476_exit);
266
267MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
268MODULE_DESCRIPTION("Analog Devices AD7475/6/7/8(A) AD7466/7/8 ADC");
269MODULE_LICENSE("GPL v2");
270MODULE_ALIAS("spi:ad7476");
diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c
new file mode 100644
index 00000000000..a92fc5a1a60
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7476_ring.c
@@ -0,0 +1,165 @@
1/*
2 * Copyright 2010 Analog Devices Inc.
3 * Copyright (C) 2008 Jonathan Cameron
4 *
5 * Licensed under the GPL-2 or later.
6 *
7 * ad7476_ring.c
8 */
9
10#include <linux/interrupt.h>
11#include <linux/device.h>
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/sysfs.h>
15#include <linux/spi/spi.h>
16
17#include "../iio.h"
18#include "../ring_generic.h"
19#include "../ring_sw.h"
20#include "../trigger.h"
21#include "../sysfs.h"
22
23#include "ad7476.h"
24
25int ad7476_scan_from_ring(struct iio_dev *indio_dev)
26{
27 struct iio_ring_buffer *ring = indio_dev->ring;
28 int ret;
29 u8 *ring_data;
30
31 ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
32 GFP_KERNEL);
33 if (ring_data == NULL) {
34 ret = -ENOMEM;
35 goto error_ret;
36 }
37 ret = ring->access->read_last(ring, ring_data);
38 if (ret)
39 goto error_free_ring_data;
40
41 ret = (ring_data[0] << 8) | ring_data[1];
42
43error_free_ring_data:
44 kfree(ring_data);
45error_ret:
46 return ret;
47}
48
49/**
50 * ad7476_ring_preenable() setup the parameters of the ring before enabling
51 *
52 * The complex nature of the setting of the nuber of bytes per datum is due
53 * to this driver currently ensuring that the timestamp is stored at an 8
54 * byte boundary.
55 **/
56static int ad7476_ring_preenable(struct iio_dev *indio_dev)
57{
58 struct ad7476_state *st = iio_priv(indio_dev);
59 struct iio_ring_buffer *ring = indio_dev->ring;
60
61 st->d_size = ring->scan_count *
62 st->chip_info->channel[0].scan_type.storagebits / 8;
63
64 if (ring->scan_timestamp) {
65 st->d_size += sizeof(s64);
66
67 if (st->d_size % sizeof(s64))
68 st->d_size += sizeof(s64) - (st->d_size % sizeof(s64));
69 }
70
71 if (indio_dev->ring->access->set_bytes_per_datum)
72 indio_dev->ring->access->set_bytes_per_datum(indio_dev->ring,
73 st->d_size);
74
75 return 0;
76}
77
78static irqreturn_t ad7476_trigger_handler(int irq, void *p)
79{
80 struct iio_poll_func *pf = p;
81 struct iio_dev *indio_dev = pf->private_data;
82 struct ad7476_state *st = iio_priv(indio_dev);
83 s64 time_ns;
84 __u8 *rxbuf;
85 int b_sent;
86
87 rxbuf = kzalloc(st->d_size, GFP_KERNEL);
88 if (rxbuf == NULL)
89 return -ENOMEM;
90
91 b_sent = spi_read(st->spi, rxbuf,
92 st->chip_info->channel[0].scan_type.storagebits / 8);
93 if (b_sent < 0)
94 goto done;
95
96 time_ns = iio_get_time_ns();
97
98 if (indio_dev->ring->scan_timestamp)
99 memcpy(rxbuf + st->d_size - sizeof(s64),
100 &time_ns, sizeof(time_ns));
101
102 indio_dev->ring->access->store_to(indio_dev->ring, rxbuf, time_ns);
103done:
104 iio_trigger_notify_done(indio_dev->trig);
105 kfree(rxbuf);
106
107 return IRQ_HANDLED;
108}
109
110static const struct iio_ring_setup_ops ad7476_ring_setup_ops = {
111 .preenable = &ad7476_ring_preenable,
112 .postenable = &iio_triggered_ring_postenable,
113 .predisable = &iio_triggered_ring_predisable,
114};
115
116int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)
117{
118 struct ad7476_state *st = iio_priv(indio_dev);
119 int ret = 0;
120
121 indio_dev->ring = iio_sw_rb_allocate(indio_dev);
122 if (!indio_dev->ring) {
123 ret = -ENOMEM;
124 goto error_ret;
125 }
126 /* Effectively select the ring buffer implementation */
127 indio_dev->ring->access = &ring_sw_access_funcs;
128 indio_dev->pollfunc
129 = iio_alloc_pollfunc(NULL,
130 &ad7476_trigger_handler,
131 IRQF_ONESHOT,
132 indio_dev,
133 "%s_consumer%d",
134 spi_get_device_id(st->spi)->name,
135 indio_dev->id);
136 if (indio_dev->pollfunc == NULL) {
137 ret = -ENOMEM;
138 goto error_deallocate_sw_rb;
139 }
140
141 /* Ring buffer functions - here trigger setup related */
142 indio_dev->ring->setup_ops = &ad7476_ring_setup_ops;
143 indio_dev->ring->scan_timestamp = true;
144
145 /* Flag that polled ring buffering is possible */
146 indio_dev->modes |= INDIO_RING_TRIGGERED;
147 return 0;
148
149error_deallocate_sw_rb:
150 iio_sw_rb_free(indio_dev->ring);
151error_ret:
152 return ret;
153}
154
155void ad7476_ring_cleanup(struct iio_dev *indio_dev)
156{
157 /* ensure that the trigger has been detached */
158 if (indio_dev->trig) {
159 iio_put_trigger(indio_dev->trig);
160 iio_trigger_dettach_poll_func(indio_dev->trig,
161 indio_dev->pollfunc);
162 }
163 iio_dealloc_pollfunc(indio_dev->pollfunc);
164 iio_sw_rb_free(indio_dev->ring);
165}
diff --git a/drivers/staging/iio/adc/ad7745.c b/drivers/staging/iio/adc/ad7745.c
new file mode 100644
index 00000000000..4c13f26aa9a
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7745.c
@@ -0,0 +1,674 @@
1/*
2 * AD774X capacitive sensor driver supporting AD7745/6/7
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/gpio.h>
11#include <linux/device.h>
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/sysfs.h>
15#include <linux/list.h>
16#include <linux/i2c.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20
21/*
22 * AD774X registers definition
23 */
24
25#define AD774X_STATUS 0
26#define AD774X_STATUS_RDY (1 << 2)
27#define AD774X_STATUS_RDYVT (1 << 1)
28#define AD774X_STATUS_RDYCAP (1 << 0)
29#define AD774X_CAP_DATA_HIGH 1
30#define AD774X_CAP_DATA_MID 2
31#define AD774X_CAP_DATA_LOW 3
32#define AD774X_VT_DATA_HIGH 4
33#define AD774X_VT_DATA_MID 5
34#define AD774X_VT_DATA_LOW 6
35#define AD774X_CAP_SETUP 7
36#define AD774X_VT_SETUP 8
37#define AD774X_EXEC_SETUP 9
38#define AD774X_CFG 10
39#define AD774X_CAPDACA 11
40#define AD774X_CAPDACB 12
41#define AD774X_CAPDAC_EN (1 << 7)
42#define AD774X_CAP_OFFH 13
43#define AD774X_CAP_OFFL 14
44#define AD774X_CAP_GAINH 15
45#define AD774X_CAP_GAINL 16
46#define AD774X_VOLT_GAINH 17
47#define AD774X_VOLT_GAINL 18
48
49#define AD774X_MAX_CONV_MODE 6
50
51/*
52 * struct ad774x_chip_info - chip specifc information
53 */
54
55struct ad774x_chip_info {
56 struct i2c_client *client;
57 bool inter;
58 u16 cap_offs; /* Capacitive offset */
59 u16 cap_gain; /* Capacitive gain calibration */
60 u16 volt_gain; /* Voltage gain calibration */
61 u8 cap_setup;
62 u8 vt_setup;
63 u8 exec_setup;
64
65 char *conversion_mode;
66};
67
68struct ad774x_conversion_mode {
69 char *name;
70 u8 reg_cfg;
71};
72
73static struct ad774x_conversion_mode
74ad774x_conv_mode_table[AD774X_MAX_CONV_MODE] = {
75 { "idle", 0 },
76 { "continuous-conversion", 1 },
77 { "single-conversion", 2 },
78 { "power-down", 3 },
79 { "offset-calibration", 5 },
80 { "gain-calibration", 6 },
81};
82
83/*
84 * ad774x register access by I2C
85 */
86
87static int ad774x_i2c_read(struct ad774x_chip_info *chip, u8 reg, u8 *data, int len)
88{
89 struct i2c_client *client = chip->client;
90 int ret;
91
92 ret = i2c_master_send(client, &reg, 1);
93 if (ret < 0) {
94 dev_err(&client->dev, "I2C write error\n");
95 return ret;
96 }
97
98 ret = i2c_master_recv(client, data, len);
99 if (ret < 0) {
100 dev_err(&client->dev, "I2C read error\n");
101 return ret;
102 }
103
104 return ret;
105}
106
107static int ad774x_i2c_write(struct ad774x_chip_info *chip, u8 reg, u8 data)
108{
109 struct i2c_client *client = chip->client;
110 int ret;
111
112 u8 tx[2] = {
113 reg,
114 data,
115 };
116
117 ret = i2c_master_send(client, tx, 2);
118 if (ret < 0)
119 dev_err(&client->dev, "I2C write error\n");
120
121 return ret;
122}
123
124/*
125 * sysfs nodes
126 */
127
128#define IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(_show) \
129 IIO_DEVICE_ATTR(available_conversion_modes, S_IRUGO, _show, NULL, 0)
130#define IIO_DEV_ATTR_CONVERSION_MODE(_mode, _show, _store) \
131 IIO_DEVICE_ATTR(conversion_mode, _mode, _show, _store, 0)
132#define IIO_DEV_ATTR_CAP_SETUP(_mode, _show, _store) \
133 IIO_DEVICE_ATTR(cap_setup, _mode, _show, _store, 0)
134#define IIO_DEV_ATTR_VT_SETUP(_mode, _show, _store) \
135 IIO_DEVICE_ATTR(in0_setup, _mode, _show, _store, 0)
136#define IIO_DEV_ATTR_EXEC_SETUP(_mode, _show, _store) \
137 IIO_DEVICE_ATTR(exec_setup, _mode, _show, _store, 0)
138#define IIO_DEV_ATTR_VOLT_GAIN(_mode, _show, _store) \
139 IIO_DEVICE_ATTR(in0_gain, _mode, _show, _store, 0)
140#define IIO_DEV_ATTR_CAP_OFFS(_mode, _show, _store) \
141 IIO_DEVICE_ATTR(cap_offs, _mode, _show, _store, 0)
142#define IIO_DEV_ATTR_CAP_GAIN(_mode, _show, _store) \
143 IIO_DEVICE_ATTR(cap_gain, _mode, _show, _store, 0)
144#define IIO_DEV_ATTR_CAP_DATA(_show) \
145 IIO_DEVICE_ATTR(cap0_raw, S_IRUGO, _show, NULL, 0)
146#define IIO_DEV_ATTR_VT_DATA(_show) \
147 IIO_DEVICE_ATTR(in0_raw, S_IRUGO, _show, NULL, 0)
148
149static ssize_t ad774x_show_conversion_modes(struct device *dev,
150 struct device_attribute *attr,
151 char *buf)
152{
153 int i;
154 int len = 0;
155
156 for (i = 0; i < AD774X_MAX_CONV_MODE; i++)
157 len += sprintf(buf + len, "%s ", ad774x_conv_mode_table[i].name);
158
159 len += sprintf(buf + len, "\n");
160
161 return len;
162}
163
164static IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(ad774x_show_conversion_modes);
165
166static ssize_t ad774x_show_conversion_mode(struct device *dev,
167 struct device_attribute *attr,
168 char *buf)
169{
170 struct iio_dev *dev_info = dev_get_drvdata(dev);
171 struct ad774x_chip_info *chip = iio_priv(dev_info);
172
173 return sprintf(buf, "%s\n", chip->conversion_mode);
174}
175
176static ssize_t ad774x_store_conversion_mode(struct device *dev,
177 struct device_attribute *attr,
178 const char *buf,
179 size_t len)
180{
181 struct iio_dev *dev_info = dev_get_drvdata(dev);
182 struct ad774x_chip_info *chip = iio_priv(dev_info);
183 u8 cfg;
184 int i;
185
186 ad774x_i2c_read(chip, AD774X_CFG, &cfg, 1);
187
188 for (i = 0; i < AD774X_MAX_CONV_MODE; i++) {
189 if (strncmp(buf, ad774x_conv_mode_table[i].name,
190 strlen(ad774x_conv_mode_table[i].name) - 1) == 0) {
191 chip->conversion_mode = ad774x_conv_mode_table[i].name;
192 cfg |= 0x18 | ad774x_conv_mode_table[i].reg_cfg;
193 ad774x_i2c_write(chip, AD774X_CFG, cfg);
194 return len;
195 }
196 }
197
198 dev_err(dev, "not supported conversion mode\n");
199
200 return -EINVAL;
201}
202
203static IIO_DEV_ATTR_CONVERSION_MODE(S_IRUGO | S_IWUSR,
204 ad774x_show_conversion_mode,
205 ad774x_store_conversion_mode);
206
207static ssize_t ad774x_show_dac_value(struct device *dev,
208 struct device_attribute *attr,
209 char *buf)
210{
211 struct iio_dev *dev_info = dev_get_drvdata(dev);
212 struct ad774x_chip_info *chip = iio_priv(dev_info);
213 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
214 u8 data;
215
216 ad774x_i2c_read(chip, this_attr->address, &data, 1);
217
218 return sprintf(buf, "%02x\n", data & 0x7F);
219}
220
221static ssize_t ad774x_store_dac_value(struct device *dev,
222 struct device_attribute *attr,
223 const char *buf,
224 size_t len)
225{
226 struct iio_dev *dev_info = dev_get_drvdata(dev);
227 struct ad774x_chip_info *chip = iio_priv(dev_info);
228 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
229 unsigned long data;
230 int ret;
231
232 ret = strict_strtoul(buf, 10, &data);
233
234 if (!ret) {
235 ad774x_i2c_write(chip, this_attr->address,
236 (data ? AD774X_CAPDAC_EN : 0) | (data & 0x7F));
237 return len;
238 }
239
240 return -EINVAL;
241}
242
243static IIO_DEVICE_ATTR(capdac0_raw, S_IRUGO | S_IWUSR,
244 ad774x_show_dac_value,
245 ad774x_store_dac_value,
246 AD774X_CAPDACA);
247
248static IIO_DEVICE_ATTR(capdac1_raw, S_IRUGO | S_IWUSR,
249 ad774x_show_dac_value,
250 ad774x_store_dac_value,
251 AD774X_CAPDACB);
252
253static ssize_t ad774x_show_cap_setup(struct device *dev,
254 struct device_attribute *attr,
255 char *buf)
256{
257 struct iio_dev *dev_info = dev_get_drvdata(dev);
258 struct ad774x_chip_info *chip = iio_priv(dev_info);
259
260 return sprintf(buf, "0x%02x\n", chip->cap_setup);
261}
262
263static ssize_t ad774x_store_cap_setup(struct device *dev,
264 struct device_attribute *attr,
265 const char *buf,
266 size_t len)
267{
268 struct iio_dev *dev_info = dev_get_drvdata(dev);
269 struct ad774x_chip_info *chip = iio_priv(dev_info);
270 unsigned long data;
271 int ret;
272
273 ret = strict_strtoul(buf, 10, &data);
274
275 if ((!ret) && (data < 0x100)) {
276 ad774x_i2c_write(chip, AD774X_CAP_SETUP, data);
277 chip->cap_setup = data;
278 return len;
279 }
280
281 return -EINVAL;
282}
283
284static IIO_DEV_ATTR_CAP_SETUP(S_IRUGO | S_IWUSR,
285 ad774x_show_cap_setup,
286 ad774x_store_cap_setup);
287
288static ssize_t ad774x_show_vt_setup(struct device *dev,
289 struct device_attribute *attr,
290 char *buf)
291{
292 struct iio_dev *dev_info = dev_get_drvdata(dev);
293 struct ad774x_chip_info *chip = iio_priv(dev_info);
294
295 return sprintf(buf, "0x%02x\n", chip->vt_setup);
296}
297
298static ssize_t ad774x_store_vt_setup(struct device *dev,
299 struct device_attribute *attr,
300 const char *buf,
301 size_t len)
302{
303 struct iio_dev *dev_info = dev_get_drvdata(dev);
304 struct ad774x_chip_info *chip = iio_priv(dev_info);
305 unsigned long data;
306 int ret;
307
308 ret = strict_strtoul(buf, 10, &data);
309
310 if ((!ret) && (data < 0x100)) {
311 ad774x_i2c_write(chip, AD774X_VT_SETUP, data);
312 chip->vt_setup = data;
313 return len;
314 }
315
316 return -EINVAL;
317}
318
319static IIO_DEV_ATTR_VT_SETUP(S_IRUGO | S_IWUSR,
320 ad774x_show_vt_setup,
321 ad774x_store_vt_setup);
322
323static ssize_t ad774x_show_exec_setup(struct device *dev,
324 struct device_attribute *attr,
325 char *buf)
326{
327 struct iio_dev *dev_info = dev_get_drvdata(dev);
328 struct ad774x_chip_info *chip = iio_priv(dev_info);
329
330 return sprintf(buf, "0x%02x\n", chip->exec_setup);
331}
332
333static ssize_t ad774x_store_exec_setup(struct device *dev,
334 struct device_attribute *attr,
335 const char *buf,
336 size_t len)
337{
338 struct iio_dev *dev_info = dev_get_drvdata(dev);
339 struct ad774x_chip_info *chip = iio_priv(dev_info);
340 unsigned long data;
341 int ret;
342
343 ret = strict_strtoul(buf, 10, &data);
344
345 if ((!ret) && (data < 0x100)) {
346 ad774x_i2c_write(chip, AD774X_EXEC_SETUP, data);
347 chip->exec_setup = data;
348 return len;
349 }
350
351 return -EINVAL;
352}
353
354static IIO_DEV_ATTR_EXEC_SETUP(S_IRUGO | S_IWUSR,
355 ad774x_show_exec_setup,
356 ad774x_store_exec_setup);
357
358static ssize_t ad774x_show_volt_gain(struct device *dev,
359 struct device_attribute *attr,
360 char *buf)
361{
362 struct iio_dev *dev_info = dev_get_drvdata(dev);
363 struct ad774x_chip_info *chip = iio_priv(dev_info);
364
365 return sprintf(buf, "%d\n", chip->volt_gain);
366}
367
368static ssize_t ad774x_store_volt_gain(struct device *dev,
369 struct device_attribute *attr,
370 const char *buf,
371 size_t len)
372{
373 struct iio_dev *dev_info = dev_get_drvdata(dev);
374 struct ad774x_chip_info *chip = iio_priv(dev_info);
375 unsigned long data;
376 int ret;
377
378 ret = strict_strtoul(buf, 10, &data);
379
380 if ((!ret) && (data < 0x10000)) {
381 ad774x_i2c_write(chip, AD774X_VOLT_GAINH, data >> 8);
382 ad774x_i2c_write(chip, AD774X_VOLT_GAINL, data);
383 chip->volt_gain = data;
384 return len;
385 }
386
387 return -EINVAL;
388}
389
390static IIO_DEV_ATTR_VOLT_GAIN(S_IRUGO | S_IWUSR,
391 ad774x_show_volt_gain,
392 ad774x_store_volt_gain);
393
394static ssize_t ad774x_show_cap_data(struct device *dev,
395 struct device_attribute *attr,
396 char *buf)
397{
398 struct iio_dev *dev_info = dev_get_drvdata(dev);
399 struct ad774x_chip_info *chip = iio_priv(dev_info);
400 unsigned long data;
401 char tmp[3];
402
403 ad774x_i2c_read(chip, AD774X_CAP_DATA_HIGH, tmp, 3);
404 data = ((int)tmp[0] << 16) | ((int)tmp[1] << 8) | (int)tmp[2];
405
406 return sprintf(buf, "%ld\n", data);
407}
408
409static IIO_DEV_ATTR_CAP_DATA(ad774x_show_cap_data);
410
411static ssize_t ad774x_show_vt_data(struct device *dev,
412 struct device_attribute *attr,
413 char *buf)
414{
415 struct iio_dev *dev_info = dev_get_drvdata(dev);
416 struct ad774x_chip_info *chip = iio_priv(dev_info);
417 unsigned long data;
418 char tmp[3];
419
420 ad774x_i2c_read(chip, AD774X_VT_DATA_HIGH, tmp, 3);
421 data = ((int)tmp[0] << 16) | ((int)tmp[1] << 8) | (int)tmp[2];
422
423 return sprintf(buf, "%ld\n", data);
424}
425
426static IIO_DEV_ATTR_VT_DATA(ad774x_show_vt_data);
427
428static ssize_t ad774x_show_cap_offs(struct device *dev,
429 struct device_attribute *attr,
430 char *buf)
431{
432 struct iio_dev *dev_info = dev_get_drvdata(dev);
433 struct ad774x_chip_info *chip = iio_priv(dev_info);
434
435 return sprintf(buf, "%d\n", chip->cap_offs);
436}
437
438static ssize_t ad774x_store_cap_offs(struct device *dev,
439 struct device_attribute *attr,
440 const char *buf,
441 size_t len)
442{
443 struct iio_dev *dev_info = dev_get_drvdata(dev);
444 struct ad774x_chip_info *chip = iio_priv(dev_info);
445 unsigned long data;
446 int ret;
447
448 ret = strict_strtoul(buf, 10, &data);
449
450 if ((!ret) && (data < 0x10000)) {
451 ad774x_i2c_write(chip, AD774X_CAP_OFFH, data >> 8);
452 ad774x_i2c_write(chip, AD774X_CAP_OFFL, data);
453 chip->cap_offs = data;
454 return len;
455 }
456
457 return -EINVAL;
458}
459
460static IIO_DEV_ATTR_CAP_OFFS(S_IRUGO | S_IWUSR,
461 ad774x_show_cap_offs,
462 ad774x_store_cap_offs);
463
464static ssize_t ad774x_show_cap_gain(struct device *dev,
465 struct device_attribute *attr,
466 char *buf)
467{
468 struct iio_dev *dev_info = dev_get_drvdata(dev);
469 struct ad774x_chip_info *chip = iio_priv(dev_info);
470
471 return sprintf(buf, "%d\n", chip->cap_gain);
472}
473
474static ssize_t ad774x_store_cap_gain(struct device *dev,
475 struct device_attribute *attr,
476 const char *buf,
477 size_t len)
478{
479 struct iio_dev *dev_info = dev_get_drvdata(dev);
480 struct ad774x_chip_info *chip = iio_priv(dev_info);
481 unsigned long data;
482 int ret;
483
484 ret = strict_strtoul(buf, 10, &data);
485
486 if ((!ret) && (data < 0x10000)) {
487 ad774x_i2c_write(chip, AD774X_CAP_GAINH, data >> 8);
488 ad774x_i2c_write(chip, AD774X_CAP_GAINL, data);
489 chip->cap_gain = data;
490 return len;
491 }
492
493 return -EINVAL;
494}
495
496static IIO_DEV_ATTR_CAP_GAIN(S_IRUGO | S_IWUSR,
497 ad774x_show_cap_gain,
498 ad774x_store_cap_gain);
499
500static struct attribute *ad774x_attributes[] = {
501 &iio_dev_attr_available_conversion_modes.dev_attr.attr,
502 &iio_dev_attr_conversion_mode.dev_attr.attr,
503 &iio_dev_attr_cap_setup.dev_attr.attr,
504 &iio_dev_attr_in0_setup.dev_attr.attr,
505 &iio_dev_attr_exec_setup.dev_attr.attr,
506 &iio_dev_attr_cap_offs.dev_attr.attr,
507 &iio_dev_attr_cap_gain.dev_attr.attr,
508 &iio_dev_attr_in0_gain.dev_attr.attr,
509 &iio_dev_attr_in0_raw.dev_attr.attr,
510 &iio_dev_attr_cap0_raw.dev_attr.attr,
511 &iio_dev_attr_capdac0_raw.dev_attr.attr,
512 &iio_dev_attr_capdac1_raw.dev_attr.attr,
513 NULL,
514};
515
516static const struct attribute_group ad774x_attribute_group = {
517 .attrs = ad774x_attributes,
518};
519
520/*
521 * data ready events
522 */
523
524#define IIO_EVENT_CODE_CAP_RDY 0
525#define IIO_EVENT_CODE_VT_RDY 1
526
527#define IIO_EVENT_ATTR_CAP_RDY_SH(_evlist, _show, _store, _mask) \
528 IIO_EVENT_ATTR_SH(cap_rdy, _evlist, _show, _store, _mask)
529
530#define IIO_EVENT_ATTR_VT_RDY_SH(_evlist, _show, _store, _mask) \
531 IIO_EVENT_ATTR_SH(vt_rdy, _evlist, _show, _store, _mask)
532
533static irqreturn_t ad774x_event_handler(int irq, void *private)
534{
535 struct iio_dev *indio_dev = private;
536 struct ad774x_chip_info *chip = iio_priv(indio_dev);
537 u8 int_status;
538
539 ad774x_i2c_read(chip, AD774X_STATUS, &int_status, 1);
540
541 if (int_status & AD774X_STATUS_RDYCAP)
542 iio_push_event(indio_dev, 0,
543 IIO_EVENT_CODE_CAP_RDY,
544 iio_get_time_ns());
545
546 if (int_status & AD774X_STATUS_RDYVT)
547 iio_push_event(indio_dev, 0,
548 IIO_EVENT_CODE_VT_RDY,
549 iio_get_time_ns());
550
551 return IRQ_HANDLED;
552}
553
554static IIO_CONST_ATTR(cap_rdy_en, "1");
555static IIO_CONST_ATTR(vt_rdy_en, "1");
556
557static struct attribute *ad774x_event_attributes[] = {
558 &iio_const_attr_cap_rdy_en.dev_attr.attr,
559 &iio_const_attr_vt_rdy_en.dev_attr.attr,
560 NULL,
561};
562
563static struct attribute_group ad774x_event_attribute_group = {
564 .attrs = ad774x_event_attributes,
565};
566
567static const struct iio_info ad774x_info = {
568 .attrs = &ad774x_event_attribute_group,
569 .event_attrs = &ad774x_event_attribute_group,
570 .num_interrupt_lines = 1,
571 .driver_module = THIS_MODULE,
572};
573/*
574 * device probe and remove
575 */
576
577static int __devinit ad774x_probe(struct i2c_client *client,
578 const struct i2c_device_id *id)
579{
580 int ret = 0, regdone = 0;
581 struct ad774x_chip_info *chip;
582 struct iio_dev *indio_dev;
583
584 indio_dev = iio_allocate_device(sizeof(*chip));
585 if (indio_dev == NULL) {
586 ret = -ENOMEM;
587 goto error_ret;
588 }
589 chip = iio_priv(indio_dev);
590 /* this is only used for device removal purposes */
591 i2c_set_clientdata(client, indio_dev);
592
593 chip->client = client;
594
595 /* Establish that the iio_dev is a child of the i2c device */
596 indio_dev->name = id->name;
597 indio_dev->dev.parent = &client->dev;
598 indio_dev->info = &ad774x_info;
599 indio_dev->modes = INDIO_DIRECT_MODE;
600
601 ret = iio_device_register(indio_dev);
602 if (ret)
603 goto error_free_dev;
604 regdone = 1;
605
606 if (client->irq) {
607 ret = request_threaded_irq(client->irq,
608 NULL,
609 &ad774x_event_handler,
610 IRQF_TRIGGER_FALLING,
611 "ad774x",
612 indio_dev);
613 if (ret)
614 goto error_free_dev;
615 }
616
617 dev_err(&client->dev, "%s capacitive sensor registered, irq: %d\n", id->name, client->irq);
618
619 return 0;
620
621error_free_dev:
622 if (regdone)
623 free_irq(client->irq, indio_dev);
624 else
625 iio_free_device(indio_dev);
626error_ret:
627 return ret;
628}
629
630static int __devexit ad774x_remove(struct i2c_client *client)
631{
632 struct iio_dev *indio_dev = i2c_get_clientdata(client);
633
634 if (client->irq)
635 free_irq(client->irq, indio_dev);
636 iio_device_unregister(indio_dev);
637
638 return 0;
639}
640
641static const struct i2c_device_id ad774x_id[] = {
642 { "ad7745", 0 },
643 { "ad7746", 0 },
644 { "ad7747", 0 },
645 {}
646};
647
648MODULE_DEVICE_TABLE(i2c, ad774x_id);
649
650static struct i2c_driver ad774x_driver = {
651 .driver = {
652 .name = "ad774x",
653 },
654 .probe = ad774x_probe,
655 .remove = __devexit_p(ad774x_remove),
656 .id_table = ad774x_id,
657};
658
659static __init int ad774x_init(void)
660{
661 return i2c_add_driver(&ad774x_driver);
662}
663
664static __exit void ad774x_exit(void)
665{
666 i2c_del_driver(&ad774x_driver);
667}
668
669MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
670MODULE_DESCRIPTION("Analog Devices ad7745/6/7 capacitive sensor driver");
671MODULE_LICENSE("GPL v2");
672
673module_init(ad774x_init);
674module_exit(ad774x_exit);
diff --git a/drivers/staging/iio/adc/ad7793.c b/drivers/staging/iio/adc/ad7793.c
new file mode 100644
index 00000000000..90f6c039d6c
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7793.c
@@ -0,0 +1,987 @@
1/*
2 * AD7792/AD7793 SPI ADC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/sysfs.h>
14#include <linux/spi/spi.h>
15#include <linux/regulator/consumer.h>
16#include <linux/err.h>
17#include <linux/sched.h>
18#include <linux/delay.h>
19
20#include "../iio.h"
21#include "../sysfs.h"
22#include "../ring_generic.h"
23#include "../ring_sw.h"
24#include "../trigger.h"
25#include "adc.h"
26
27#include "ad7793.h"
28
29/* NOTE:
30 * The AD7792/AD7793 features a dual use data out ready DOUT/RDY output.
31 * In order to avoid contentions on the SPI bus, it's therefore necessary
32 * to use spi bus locking.
33 *
34 * The DOUT/RDY output must also be wired to an interrupt capable GPIO.
35 */
36
37struct ad7793_chip_info {
38 struct iio_chan_spec channel[7];
39};
40
41struct ad7793_state {
42 struct spi_device *spi;
43 struct iio_trigger *trig;
44 const struct ad7793_chip_info *chip_info;
45 struct regulator *reg;
46 struct ad7793_platform_data *pdata;
47 wait_queue_head_t wq_data_avail;
48 bool done;
49 bool irq_dis;
50 u16 int_vref_mv;
51 u16 mode;
52 u16 conf;
53 u32 scale_avail[8][2];
54 u32 available_scan_masks[7];
55 /*
56 * DMA (thus cache coherency maintenance) requires the
57 * transfer buffers to live in their own cache lines.
58 */
59 u8 data[4] ____cacheline_aligned;
60};
61
62enum ad7793_supported_device_ids {
63 ID_AD7792,
64 ID_AD7793,
65};
66
67static int __ad7793_write_reg(struct ad7793_state *st, bool locked,
68 bool cs_change, unsigned char reg,
69 unsigned size, unsigned val)
70{
71 u8 *data = st->data;
72 struct spi_transfer t = {
73 .tx_buf = data,
74 .len = size + 1,
75 .cs_change = cs_change,
76 };
77 struct spi_message m;
78
79 data[0] = AD7793_COMM_WRITE | AD7793_COMM_ADDR(reg);
80
81 switch (size) {
82 case 3:
83 data[1] = val >> 16;
84 data[2] = val >> 8;
85 data[3] = val;
86 break;
87 case 2:
88 data[1] = val >> 8;
89 data[2] = val;
90 break;
91 case 1:
92 data[1] = val;
93 break;
94 default:
95 return -EINVAL;
96 }
97
98 spi_message_init(&m);
99 spi_message_add_tail(&t, &m);
100
101 if (locked)
102 return spi_sync_locked(st->spi, &m);
103 else
104 return spi_sync(st->spi, &m);
105}
106
107static int ad7793_write_reg(struct ad7793_state *st,
108 unsigned reg, unsigned size, unsigned val)
109{
110 return __ad7793_write_reg(st, false, false, reg, size, val);
111}
112
113static int __ad7793_read_reg(struct ad7793_state *st, bool locked,
114 bool cs_change, unsigned char reg,
115 int *val, unsigned size)
116{
117 u8 *data = st->data;
118 int ret;
119 struct spi_transfer t[] = {
120 {
121 .tx_buf = data,
122 .len = 1,
123 }, {
124 .rx_buf = data,
125 .len = size,
126 .cs_change = cs_change,
127 },
128 };
129 struct spi_message m;
130
131 data[0] = AD7793_COMM_READ | AD7793_COMM_ADDR(reg);
132
133 spi_message_init(&m);
134 spi_message_add_tail(&t[0], &m);
135 spi_message_add_tail(&t[1], &m);
136
137 if (locked)
138 ret = spi_sync_locked(st->spi, &m);
139 else
140 ret = spi_sync(st->spi, &m);
141
142 if (ret < 0)
143 return ret;
144
145 switch (size) {
146 case 3:
147 *val = data[0] << 16 | data[1] << 8 | data[2];
148 break;
149 case 2:
150 *val = data[0] << 8 | data[1];
151 break;
152 case 1:
153 *val = data[0];
154 break;
155 default:
156 return -EINVAL;
157 }
158
159 return 0;
160}
161
162static int ad7793_read_reg(struct ad7793_state *st,
163 unsigned reg, int *val, unsigned size)
164{
165 return __ad7793_read_reg(st, 0, 0, reg, val, size);
166}
167
168static int ad7793_read(struct ad7793_state *st, unsigned ch,
169 unsigned len, int *val)
170{
171 int ret;
172 st->conf = (st->conf & ~AD7793_CONF_CHAN(-1)) | AD7793_CONF_CHAN(ch);
173 st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) |
174 AD7793_MODE_SEL(AD7793_MODE_SINGLE);
175
176 ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
177
178 spi_bus_lock(st->spi->master);
179 st->done = false;
180
181 ret = __ad7793_write_reg(st, 1, 1, AD7793_REG_MODE,
182 sizeof(st->mode), st->mode);
183 if (ret < 0)
184 goto out;
185
186 st->irq_dis = false;
187 enable_irq(st->spi->irq);
188 wait_event_interruptible(st->wq_data_avail, st->done);
189
190 ret = __ad7793_read_reg(st, 1, 0, AD7793_REG_DATA, val, len);
191out:
192 spi_bus_unlock(st->spi->master);
193
194 return ret;
195}
196
197static int ad7793_calibrate(struct ad7793_state *st, unsigned mode, unsigned ch)
198{
199 int ret;
200
201 st->conf = (st->conf & ~AD7793_CONF_CHAN(-1)) | AD7793_CONF_CHAN(ch);
202 st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) | AD7793_MODE_SEL(mode);
203
204 ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
205
206 spi_bus_lock(st->spi->master);
207 st->done = false;
208
209 ret = __ad7793_write_reg(st, 1, 1, AD7793_REG_MODE,
210 sizeof(st->mode), st->mode);
211 if (ret < 0)
212 goto out;
213
214 st->irq_dis = false;
215 enable_irq(st->spi->irq);
216 wait_event_interruptible(st->wq_data_avail, st->done);
217
218 st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) |
219 AD7793_MODE_SEL(AD7793_MODE_IDLE);
220
221 ret = __ad7793_write_reg(st, 1, 0, AD7793_REG_MODE,
222 sizeof(st->mode), st->mode);
223out:
224 spi_bus_unlock(st->spi->master);
225
226 return ret;
227}
228
229static const u8 ad7793_calib_arr[6][2] = {
230 {AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN1P_AIN1M},
231 {AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN1P_AIN1M},
232 {AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN2P_AIN2M},
233 {AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN2P_AIN2M},
234 {AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN3P_AIN3M},
235 {AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN3P_AIN3M}
236};
237
238static int ad7793_calibrate_all(struct ad7793_state *st)
239{
240 int i, ret;
241
242 for (i = 0; i < ARRAY_SIZE(ad7793_calib_arr); i++) {
243 ret = ad7793_calibrate(st, ad7793_calib_arr[i][0],
244 ad7793_calib_arr[i][1]);
245 if (ret)
246 goto out;
247 }
248
249 return 0;
250out:
251 dev_err(&st->spi->dev, "Calibration failed\n");
252 return ret;
253}
254
255static int ad7793_setup(struct ad7793_state *st)
256{
257 int i, ret = -1;
258 unsigned long long scale_uv;
259 u32 id;
260
261 /* reset the serial interface */
262 ret = spi_write(st->spi, (u8 *)&ret, sizeof(ret));
263 if (ret < 0)
264 goto out;
265 msleep(1); /* Wait for at least 500us */
266
267 /* write/read test for device presence */
268 ret = ad7793_read_reg(st, AD7793_REG_ID, &id, 1);
269 if (ret)
270 goto out;
271
272 id &= AD7793_ID_MASK;
273
274 if (!((id == AD7792_ID) || (id == AD7793_ID))) {
275 dev_err(&st->spi->dev, "device ID query failed\n");
276 goto out;
277 }
278
279 st->mode = (st->pdata->mode & ~AD7793_MODE_SEL(-1)) |
280 AD7793_MODE_SEL(AD7793_MODE_IDLE);
281 st->conf = st->pdata->conf & ~AD7793_CONF_CHAN(-1);
282
283 ret = ad7793_write_reg(st, AD7793_REG_MODE, sizeof(st->mode), st->mode);
284 if (ret)
285 goto out;
286
287 ret = ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
288 if (ret)
289 goto out;
290
291 ret = ad7793_write_reg(st, AD7793_REG_IO,
292 sizeof(st->pdata->io), st->pdata->io);
293 if (ret)
294 goto out;
295
296 ret = ad7793_calibrate_all(st);
297 if (ret)
298 goto out;
299
300 /* Populate available ADC input ranges */
301 for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) {
302 scale_uv = ((u64)st->int_vref_mv * 100000000)
303 >> (st->chip_info->channel[0].scan_type.realbits -
304 (!!(st->conf & AD7793_CONF_UNIPOLAR) ? 0 : 1));
305 scale_uv >>= i;
306
307 st->scale_avail[i][1] = do_div(scale_uv, 100000000) * 10;
308 st->scale_avail[i][0] = scale_uv;
309 }
310
311 return 0;
312out:
313 dev_err(&st->spi->dev, "setup failed\n");
314 return ret;
315}
316
317static int ad7793_scan_from_ring(struct ad7793_state *st, unsigned ch, int *val)
318{
319 struct iio_ring_buffer *ring = iio_priv_to_dev(st)->ring;
320 int ret;
321 s64 dat64[2];
322 u32 *dat32 = (u32 *)dat64;
323
324 if (!(ring->scan_mask & (1 << ch)))
325 return -EBUSY;
326
327 ret = ring->access->read_last(ring, (u8 *) &dat64);
328 if (ret)
329 return ret;
330
331 *val = *dat32;
332
333 return 0;
334}
335
336static int ad7793_ring_preenable(struct iio_dev *indio_dev)
337{
338 struct ad7793_state *st = iio_priv(indio_dev);
339 struct iio_ring_buffer *ring = indio_dev->ring;
340 size_t d_size;
341 unsigned channel;
342
343 if (!ring->scan_count)
344 return -EINVAL;
345
346 channel = __ffs(ring->scan_mask);
347
348 d_size = ring->scan_count *
349 indio_dev->channels[0].scan_type.storagebits / 8;
350
351 if (ring->scan_timestamp) {
352 d_size += sizeof(s64);
353
354 if (d_size % sizeof(s64))
355 d_size += sizeof(s64) - (d_size % sizeof(s64));
356 }
357
358 if (indio_dev->ring->access->set_bytes_per_datum)
359 indio_dev->ring->access->set_bytes_per_datum(indio_dev->ring,
360 d_size);
361
362 st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) |
363 AD7793_MODE_SEL(AD7793_MODE_CONT);
364 st->conf = (st->conf & ~AD7793_CONF_CHAN(-1)) |
365 AD7793_CONF_CHAN(indio_dev->channels[channel].address);
366
367 ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
368
369 spi_bus_lock(st->spi->master);
370 __ad7793_write_reg(st, 1, 1, AD7793_REG_MODE,
371 sizeof(st->mode), st->mode);
372
373 st->irq_dis = false;
374 enable_irq(st->spi->irq);
375
376 return 0;
377}
378
379static int ad7793_ring_postdisable(struct iio_dev *indio_dev)
380{
381 struct ad7793_state *st = iio_priv(indio_dev);
382
383 st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) |
384 AD7793_MODE_SEL(AD7793_MODE_IDLE);
385
386 st->done = false;
387 wait_event_interruptible(st->wq_data_avail, st->done);
388
389 if (!st->irq_dis)
390 disable_irq_nosync(st->spi->irq);
391
392 __ad7793_write_reg(st, 1, 0, AD7793_REG_MODE,
393 sizeof(st->mode), st->mode);
394
395 return spi_bus_unlock(st->spi->master);
396}
397
398/**
399 * ad7793_trigger_handler() bh of trigger launched polling to ring buffer
400 **/
401
402static irqreturn_t ad7793_trigger_handler(int irq, void *p)
403{
404 struct iio_poll_func *pf = p;
405 struct iio_dev *indio_dev = pf->private_data;
406 struct iio_ring_buffer *ring = indio_dev->ring;
407 struct ad7793_state *st = iio_priv(indio_dev);
408 s64 dat64[2];
409 s32 *dat32 = (s32 *)dat64;
410
411 if (ring->scan_count)
412 __ad7793_read_reg(st, 1, 1, AD7793_REG_DATA,
413 dat32,
414 indio_dev->channels[0].scan_type.realbits/8);
415
416 /* Guaranteed to be aligned with 8 byte boundary */
417 if (ring->scan_timestamp)
418 dat64[1] = pf->timestamp;
419
420 ring->access->store_to(ring, (u8 *)dat64, pf->timestamp);
421
422 iio_trigger_notify_done(indio_dev->trig);
423 st->irq_dis = false;
424 enable_irq(st->spi->irq);
425
426 return IRQ_HANDLED;
427}
428
429static const struct iio_ring_setup_ops ad7793_ring_setup_ops = {
430 .preenable = &ad7793_ring_preenable,
431 .postenable = &iio_triggered_ring_postenable,
432 .predisable = &iio_triggered_ring_predisable,
433 .postdisable = &ad7793_ring_postdisable,
434};
435
436static int ad7793_register_ring_funcs_and_init(struct iio_dev *indio_dev)
437{
438 int ret;
439
440 indio_dev->ring = iio_sw_rb_allocate(indio_dev);
441 if (!indio_dev->ring) {
442 ret = -ENOMEM;
443 goto error_ret;
444 }
445 /* Effectively select the ring buffer implementation */
446 indio_dev->ring->access = &ring_sw_access_funcs;
447 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
448 &ad7793_trigger_handler,
449 IRQF_ONESHOT,
450 indio_dev,
451 "ad7793_consumer%d",
452 indio_dev->id);
453 if (indio_dev->pollfunc == NULL) {
454 ret = -ENOMEM;
455 goto error_deallocate_sw_rb;
456 }
457
458 /* Ring buffer functions - here trigger setup related */
459 indio_dev->ring->setup_ops = &ad7793_ring_setup_ops;
460
461 /* Flag that polled ring buffering is possible */
462 indio_dev->modes |= INDIO_RING_TRIGGERED;
463 return 0;
464
465error_deallocate_sw_rb:
466 iio_sw_rb_free(indio_dev->ring);
467error_ret:
468 return ret;
469}
470
471static void ad7793_ring_cleanup(struct iio_dev *indio_dev)
472{
473 /* ensure that the trigger has been detached */
474 if (indio_dev->trig) {
475 iio_put_trigger(indio_dev->trig);
476 iio_trigger_dettach_poll_func(indio_dev->trig,
477 indio_dev->pollfunc);
478 }
479 iio_dealloc_pollfunc(indio_dev->pollfunc);
480 iio_sw_rb_free(indio_dev->ring);
481}
482
483/**
484 * ad7793_data_rdy_trig_poll() the event handler for the data rdy trig
485 **/
486static irqreturn_t ad7793_data_rdy_trig_poll(int irq, void *private)
487{
488 struct ad7793_state *st = iio_priv(private);
489
490 st->done = true;
491 wake_up_interruptible(&st->wq_data_avail);
492 disable_irq_nosync(irq);
493 st->irq_dis = true;
494 iio_trigger_poll(st->trig, iio_get_time_ns());
495
496 return IRQ_HANDLED;
497}
498
499static int ad7793_probe_trigger(struct iio_dev *indio_dev)
500{
501 struct ad7793_state *st = iio_priv(indio_dev);
502 int ret;
503
504 st->trig = iio_allocate_trigger("%s-dev%d",
505 spi_get_device_id(st->spi)->name,
506 indio_dev->id);
507 if (st->trig == NULL) {
508 ret = -ENOMEM;
509 goto error_ret;
510 }
511
512 ret = request_irq(st->spi->irq,
513 ad7793_data_rdy_trig_poll,
514 IRQF_TRIGGER_LOW,
515 spi_get_device_id(st->spi)->name,
516 indio_dev);
517 if (ret)
518 goto error_free_trig;
519
520 disable_irq_nosync(st->spi->irq);
521 st->irq_dis = true;
522 st->trig->dev.parent = &st->spi->dev;
523 st->trig->owner = THIS_MODULE;
524 st->trig->private_data = indio_dev;
525
526 ret = iio_trigger_register(st->trig);
527
528 /* select default trigger */
529 indio_dev->trig = st->trig;
530 if (ret)
531 goto error_free_irq;
532
533 return 0;
534
535error_free_irq:
536 free_irq(st->spi->irq, indio_dev);
537error_free_trig:
538 iio_free_trigger(st->trig);
539error_ret:
540 return ret;
541}
542
543static void ad7793_remove_trigger(struct iio_dev *indio_dev)
544{
545 struct ad7793_state *st = iio_priv(indio_dev);
546
547 iio_trigger_unregister(st->trig);
548 free_irq(st->spi->irq, indio_dev);
549 iio_free_trigger(st->trig);
550}
551
552static const u16 sample_freq_avail[16] = {0, 470, 242, 123, 62, 50, 39, 33, 19,
553 17, 16, 12, 10, 8, 6, 4};
554
555static ssize_t ad7793_read_frequency(struct device *dev,
556 struct device_attribute *attr,
557 char *buf)
558{
559 struct iio_dev *indio_dev = dev_get_drvdata(dev);
560 struct ad7793_state *st = iio_priv(indio_dev);
561
562 return sprintf(buf, "%d\n",
563 sample_freq_avail[AD7793_MODE_RATE(st->mode)]);
564}
565
566static ssize_t ad7793_write_frequency(struct device *dev,
567 struct device_attribute *attr,
568 const char *buf,
569 size_t len)
570{
571 struct iio_dev *indio_dev = dev_get_drvdata(dev);
572 struct ad7793_state *st = iio_priv(indio_dev);
573 long lval;
574 int i, ret;
575
576 mutex_lock(&indio_dev->mlock);
577 if (iio_ring_enabled(indio_dev)) {
578 mutex_unlock(&indio_dev->mlock);
579 return -EBUSY;
580 }
581 mutex_unlock(&indio_dev->mlock);
582
583 ret = strict_strtol(buf, 10, &lval);
584 if (ret)
585 return ret;
586
587 ret = -EINVAL;
588
589 for (i = 0; i < ARRAY_SIZE(sample_freq_avail); i++)
590 if (lval == sample_freq_avail[i]) {
591 mutex_lock(&indio_dev->mlock);
592 st->mode &= ~AD7793_MODE_RATE(-1);
593 st->mode |= AD7793_MODE_RATE(i);
594 ad7793_write_reg(st, AD7793_REG_MODE,
595 sizeof(st->mode), st->mode);
596 mutex_unlock(&indio_dev->mlock);
597 ret = 0;
598 }
599
600 return ret ? ret : len;
601}
602
603static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
604 ad7793_read_frequency,
605 ad7793_write_frequency);
606
607static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
608 "470 242 123 62 50 39 33 19 17 16 12 10 8 6 4");
609
610static ssize_t ad7793_show_scale_available(struct device *dev,
611 struct device_attribute *attr, char *buf)
612{
613 struct iio_dev *indio_dev = dev_get_drvdata(dev);
614 struct ad7793_state *st = iio_priv(indio_dev);
615 int i, len = 0;
616
617 for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
618 len += sprintf(buf + len, "%d.%09u ", st->scale_avail[i][0],
619 st->scale_avail[i][1]);
620
621 len += sprintf(buf + len, "\n");
622
623 return len;
624}
625
626static IIO_DEVICE_ATTR_NAMED(in_m_in_scale_available, in-in_scale_available,
627 S_IRUGO, ad7793_show_scale_available, NULL, 0);
628
629static struct attribute *ad7793_attributes[] = {
630 &iio_dev_attr_sampling_frequency.dev_attr.attr,
631 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
632 &iio_dev_attr_in_m_in_scale_available.dev_attr.attr,
633 NULL
634};
635
636static const struct attribute_group ad7793_attribute_group = {
637 .attrs = ad7793_attributes,
638};
639
640static int ad7793_read_raw(struct iio_dev *indio_dev,
641 struct iio_chan_spec const *chan,
642 int *val,
643 int *val2,
644 long m)
645{
646 struct ad7793_state *st = iio_priv(indio_dev);
647 int ret, smpl = 0;
648 unsigned long long scale_uv;
649 bool unipolar = !!(st->conf & AD7793_CONF_UNIPOLAR);
650
651 switch (m) {
652 case 0:
653 mutex_lock(&indio_dev->mlock);
654 if (iio_ring_enabled(indio_dev))
655 ret = ad7793_scan_from_ring(st,
656 chan->scan_index, &smpl);
657 else
658 ret = ad7793_read(st, chan->address,
659 chan->scan_type.realbits / 8, &smpl);
660 mutex_unlock(&indio_dev->mlock);
661
662 if (ret < 0)
663 return ret;
664
665 *val = (smpl >> chan->scan_type.shift) &
666 ((1 << (chan->scan_type.realbits)) - 1);
667
668 if (!unipolar)
669 *val -= (1 << (chan->scan_type.realbits - 1));
670
671 return IIO_VAL_INT;
672
673 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
674 *val = st->scale_avail[(st->conf >> 8) & 0x7][0];
675 *val2 = st->scale_avail[(st->conf >> 8) & 0x7][1];
676
677 return IIO_VAL_INT_PLUS_NANO;
678
679 case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
680 switch (chan->type) {
681 case IIO_IN:
682 /* 1170mV / 2^23 * 6 */
683 scale_uv = (1170ULL * 100000000ULL * 6ULL)
684 >> (chan->scan_type.realbits -
685 (unipolar ? 0 : 1));
686 break;
687 case IIO_TEMP:
688 /* Always uses unity gain and internal ref */
689 scale_uv = (2500ULL * 100000000ULL)
690 >> (chan->scan_type.realbits -
691 (unipolar ? 0 : 1));
692 break;
693 default:
694 return -EINVAL;
695 }
696
697 *val2 = do_div(scale_uv, 100000000) * 10;
698 *val = scale_uv;
699
700 return IIO_VAL_INT_PLUS_NANO;
701 }
702 return -EINVAL;
703}
704
705static int ad7793_write_raw(struct iio_dev *indio_dev,
706 struct iio_chan_spec const *chan,
707 int val,
708 int val2,
709 long mask)
710{
711 struct ad7793_state *st = iio_priv(indio_dev);
712 int ret, i;
713 unsigned int tmp;
714
715 mutex_lock(&indio_dev->mlock);
716 if (iio_ring_enabled(indio_dev)) {
717 mutex_unlock(&indio_dev->mlock);
718 return -EBUSY;
719 }
720
721 switch (mask) {
722 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
723 ret = -EINVAL;
724 for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
725 if (val2 == st->scale_avail[i][1]) {
726 tmp = st->conf;
727 st->conf &= ~AD7793_CONF_GAIN(-1);
728 st->conf |= AD7793_CONF_GAIN(i);
729
730 if (tmp != st->conf) {
731 ad7793_write_reg(st, AD7793_REG_CONF,
732 sizeof(st->conf),
733 st->conf);
734 ad7793_calibrate_all(st);
735 }
736 ret = 0;
737 }
738
739 default:
740 ret = -EINVAL;
741 }
742
743 mutex_unlock(&indio_dev->mlock);
744 return ret;
745}
746
747static int ad7793_validate_trigger(struct iio_dev *indio_dev,
748 struct iio_trigger *trig)
749{
750 if (indio_dev->trig != trig)
751 return -EINVAL;
752
753 return 0;
754}
755
756static int ad7793_write_raw_get_fmt(struct iio_dev *indio_dev,
757 struct iio_chan_spec const *chan,
758 long mask)
759{
760 return IIO_VAL_INT_PLUS_NANO;
761}
762
763static const struct iio_info ad7793_info = {
764 .read_raw = &ad7793_read_raw,
765 .write_raw = &ad7793_write_raw,
766 .write_raw_get_fmt = &ad7793_write_raw_get_fmt,
767 .attrs = &ad7793_attribute_group,
768 .validate_trigger = ad7793_validate_trigger,
769 .driver_module = THIS_MODULE,
770};
771
772static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
773 [ID_AD7793] = {
774 .channel[0] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 0, 0,
775 (1 << IIO_CHAN_INFO_SCALE_SHARED),
776 AD7793_CH_AIN1P_AIN1M,
777 0, IIO_ST('s', 24, 32, 0), 0),
778 .channel[1] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 1, 1,
779 (1 << IIO_CHAN_INFO_SCALE_SHARED),
780 AD7793_CH_AIN2P_AIN2M,
781 1, IIO_ST('s', 24, 32, 0), 0),
782 .channel[2] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 2, 2,
783 (1 << IIO_CHAN_INFO_SCALE_SHARED),
784 AD7793_CH_AIN3P_AIN3M,
785 2, IIO_ST('s', 24, 32, 0), 0),
786 .channel[3] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, "shorted", 0, 0,
787 (1 << IIO_CHAN_INFO_SCALE_SHARED),
788 AD7793_CH_AIN1M_AIN1M,
789 3, IIO_ST('s', 24, 32, 0), 0),
790 .channel[4] = IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
791 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
792 AD7793_CH_TEMP,
793 4, IIO_ST('s', 24, 32, 0), 0),
794 .channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, "supply", 4, 0,
795 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
796 AD7793_CH_AVDD_MONITOR,
797 5, IIO_ST('s', 24, 32, 0), 0),
798 .channel[6] = IIO_CHAN_SOFT_TIMESTAMP(6),
799 },
800 [ID_AD7792] = {
801 .channel[0] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 0, 0,
802 (1 << IIO_CHAN_INFO_SCALE_SHARED),
803 AD7793_CH_AIN1P_AIN1M,
804 0, IIO_ST('s', 16, 32, 0), 0),
805 .channel[1] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 1, 1,
806 (1 << IIO_CHAN_INFO_SCALE_SHARED),
807 AD7793_CH_AIN2P_AIN2M,
808 1, IIO_ST('s', 16, 32, 0), 0),
809 .channel[2] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 2, 2,
810 (1 << IIO_CHAN_INFO_SCALE_SHARED),
811 AD7793_CH_AIN3P_AIN3M,
812 2, IIO_ST('s', 16, 32, 0), 0),
813 .channel[3] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, "shorted", 0, 0,
814 (1 << IIO_CHAN_INFO_SCALE_SHARED),
815 AD7793_CH_AIN1M_AIN1M,
816 3, IIO_ST('s', 16, 32, 0), 0),
817 .channel[4] = IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
818 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
819 AD7793_CH_TEMP,
820 4, IIO_ST('s', 16, 32, 0), 0),
821 .channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, "supply", 4, 0,
822 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
823 AD7793_CH_AVDD_MONITOR,
824 5, IIO_ST('s', 16, 32, 0), 0),
825 .channel[6] = IIO_CHAN_SOFT_TIMESTAMP(6),
826 },
827};
828
829static int __devinit ad7793_probe(struct spi_device *spi)
830{
831 struct ad7793_platform_data *pdata = spi->dev.platform_data;
832 struct ad7793_state *st;
833 struct iio_dev *indio_dev;
834 int ret, i, voltage_uv = 0, regdone = 0;
835
836 if (!pdata) {
837 dev_err(&spi->dev, "no platform data?\n");
838 return -ENODEV;
839 }
840
841 if (!spi->irq) {
842 dev_err(&spi->dev, "no IRQ?\n");
843 return -ENODEV;
844 }
845
846 indio_dev = iio_allocate_device(sizeof(*st));
847 if (indio_dev == NULL)
848 return -ENOMEM;
849
850 st = iio_priv(indio_dev);
851
852 st->reg = regulator_get(&spi->dev, "vcc");
853 if (!IS_ERR(st->reg)) {
854 ret = regulator_enable(st->reg);
855 if (ret)
856 goto error_put_reg;
857
858 voltage_uv = regulator_get_voltage(st->reg);
859 }
860
861 st->chip_info =
862 &ad7793_chip_info_tbl[spi_get_device_id(spi)->driver_data];
863
864 st->pdata = pdata;
865
866 if (pdata && pdata->vref_mv)
867 st->int_vref_mv = pdata->vref_mv;
868 else if (voltage_uv)
869 st->int_vref_mv = voltage_uv / 1000;
870 else
871 st->int_vref_mv = 2500; /* Build-in ref */
872
873 spi_set_drvdata(spi, indio_dev);
874 st->spi = spi;
875
876 indio_dev->dev.parent = &spi->dev;
877 indio_dev->name = spi_get_device_id(spi)->name;
878 indio_dev->modes = INDIO_DIRECT_MODE;
879 indio_dev->channels = st->chip_info->channel;
880 indio_dev->available_scan_masks = st->available_scan_masks;
881 indio_dev->num_channels = 7;
882 indio_dev->info = &ad7793_info;
883
884 for (i = 0; i < indio_dev->num_channels; i++)
885 st->available_scan_masks[i] = (1 << i) | (1 <<
886 indio_dev->channels[indio_dev->num_channels - 1].
887 scan_index);
888
889 init_waitqueue_head(&st->wq_data_avail);
890
891 ret = ad7793_register_ring_funcs_and_init(indio_dev);
892 if (ret)
893 goto error_disable_reg;
894
895 ret = iio_device_register(indio_dev);
896 if (ret)
897 goto error_unreg_ring;
898 regdone = 1;
899
900 ret = ad7793_probe_trigger(indio_dev);
901 if (ret)
902 goto error_unreg_ring;
903
904 ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
905 indio_dev->channels,
906 indio_dev->num_channels);
907 if (ret)
908 goto error_remove_trigger;
909
910 ret = ad7793_setup(st);
911 if (ret)
912 goto error_uninitialize_ring;
913
914 return 0;
915
916error_uninitialize_ring:
917 iio_ring_buffer_unregister(indio_dev->ring);
918error_remove_trigger:
919 ad7793_remove_trigger(indio_dev);
920error_unreg_ring:
921 ad7793_ring_cleanup(indio_dev);
922error_disable_reg:
923 if (!IS_ERR(st->reg))
924 regulator_disable(st->reg);
925error_put_reg:
926 if (!IS_ERR(st->reg))
927 regulator_put(st->reg);
928
929 if (regdone)
930 iio_device_unregister(indio_dev);
931 else
932 iio_free_device(indio_dev);
933
934 return ret;
935}
936
937static int ad7793_remove(struct spi_device *spi)
938{
939 struct iio_dev *indio_dev = spi_get_drvdata(spi);
940 struct ad7793_state *st = iio_priv(indio_dev);
941
942 iio_ring_buffer_unregister(indio_dev->ring);
943 ad7793_remove_trigger(indio_dev);
944 ad7793_ring_cleanup(indio_dev);
945
946 if (!IS_ERR(st->reg)) {
947 regulator_disable(st->reg);
948 regulator_put(st->reg);
949 }
950
951 iio_device_unregister(indio_dev);
952
953 return 0;
954}
955
956static const struct spi_device_id ad7793_id[] = {
957 {"ad7792", ID_AD7792},
958 {"ad7793", ID_AD7793},
959 {}
960};
961
962static struct spi_driver ad7793_driver = {
963 .driver = {
964 .name = "ad7793",
965 .bus = &spi_bus_type,
966 .owner = THIS_MODULE,
967 },
968 .probe = ad7793_probe,
969 .remove = __devexit_p(ad7793_remove),
970 .id_table = ad7793_id,
971};
972
973static int __init ad7793_init(void)
974{
975 return spi_register_driver(&ad7793_driver);
976}
977module_init(ad7793_init);
978
979static void __exit ad7793_exit(void)
980{
981 spi_unregister_driver(&ad7793_driver);
982}
983module_exit(ad7793_exit);
984
985MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
986MODULE_DESCRIPTION("Analog Devices AD7792/3 ADC");
987MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/adc/ad7793.h b/drivers/staging/iio/adc/ad7793.h
new file mode 100644
index 00000000000..64f7d41dc45
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7793.h
@@ -0,0 +1,107 @@
1/*
2 * AD7792/AD7793 SPI ADC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8#ifndef IIO_ADC_AD7793_H_
9#define IIO_ADC_AD7793_H_
10
11/*
12 * TODO: struct ad7793_platform_data needs to go into include/linux/iio
13 */
14
15/* Registers */
16#define AD7793_REG_COMM 0 /* Communications Register (WO, 8-bit) */
17#define AD7793_REG_STAT 0 /* Status Register (RO, 8-bit) */
18#define AD7793_REG_MODE 1 /* Mode Register (RW, 16-bit */
19#define AD7793_REG_CONF 2 /* Configuration Register (RW, 16-bit) */
20#define AD7793_REG_DATA 3 /* Data Register (RO, 16-/24-bit) */
21#define AD7793_REG_ID 4 /* ID Register (RO, 8-bit) */
22#define AD7793_REG_IO 5 /* IO Register (RO, 8-bit) */
23#define AD7793_REG_OFFSET 6 /* Offset Register (RW, 16-bit
24 * (AD7792)/24-bit (AD7793)) */
25#define AD7793_REG_FULLSALE 7 /* Full-Scale Register
26 * (RW, 16-bit (AD7792)/24-bit (AD7793)) */
27
28/* Communications Register Bit Designations (AD7793_REG_COMM) */
29#define AD7793_COMM_WEN (1 << 7) /* Write Enable */
30#define AD7793_COMM_WRITE (0 << 6) /* Write Operation */
31#define AD7793_COMM_READ (1 << 6) /* Read Operation */
32#define AD7793_COMM_ADDR(x) (((x) & 0x7) << 3) /* Register Address */
33#define AD7793_COMM_CREAD (1 << 2) /* Continuous Read of Data Register */
34
35/* Status Register Bit Designations (AD7793_REG_STAT) */
36#define AD7793_STAT_RDY (1 << 7) /* Ready */
37#define AD7793_STAT_ERR (1 << 6) /* Error (Overrange, Underrange) */
38#define AD7793_STAT_CH3 (1 << 2) /* Channel 3 */
39#define AD7793_STAT_CH2 (1 << 1) /* Channel 2 */
40#define AD7793_STAT_CH1 (1 << 0) /* Channel 1 */
41
42/* Mode Register Bit Designations (AD7793_REG_MODE) */
43#define AD7793_MODE_SEL(x) (((x) & 0x7) << 13) /* Operation Mode Select */
44#define AD7793_MODE_CLKSRC(x) (((x) & 0x3) << 6) /* ADC Clock Source Select */
45#define AD7793_MODE_RATE(x) ((x) & 0xF) /* Filter Update Rate Select */
46
47#define AD7793_MODE_CONT 0 /* Continuous Conversion Mode */
48#define AD7793_MODE_SINGLE 1 /* Single Conversion Mode */
49#define AD7793_MODE_IDLE 2 /* Idle Mode */
50#define AD7793_MODE_PWRDN 3 /* Power-Down Mode */
51#define AD7793_MODE_CAL_INT_ZERO 4 /* Internal Zero-Scale Calibration */
52#define AD7793_MODE_CAL_INT_FULL 5 /* Internal Full-Scale Calibration */
53#define AD7793_MODE_CAL_SYS_ZERO 6 /* System Zero-Scale Calibration */
54#define AD7793_MODE_CAL_SYS_FULL 7 /* System Full-Scale Calibration */
55
56#define AD7793_CLK_INT 0 /* Internal 64 kHz Clock not
57 * available at the CLK pin */
58#define AD7793_CLK_INT_CO 1 /* Internal 64 kHz Clock available
59 * at the CLK pin */
60#define AD7793_CLK_EXT 2 /* External 64 kHz Clock */
61#define AD7793_CLK_EXT_DIV2 3 /* External Clock divided by 2 */
62
63/* Configuration Register Bit Designations (AD7793_REG_CONF) */
64#define AD7793_CONF_VBIAS(x) (((x) & 0x3) << 14) /* Bias Voltage
65 * Generator Enable */
66#define AD7793_CONF_BO_EN (1 << 13) /* Burnout Current Enable */
67#define AD7793_CONF_UNIPOLAR (1 << 12) /* Unipolar/Bipolar Enable */
68#define AD7793_CONF_BOOST (1 << 11) /* Boost Enable */
69#define AD7793_CONF_GAIN(x) (((x) & 0x7) << 8) /* Gain Select */
70#define AD7793_CONF_REFSEL (1 << 7) /* INT/EXT Reference Select */
71#define AD7793_CONF_BUF (1 << 4) /* Buffered Mode Enable */
72#define AD7793_CONF_CHAN(x) ((x) & 0x7) /* Channel select */
73
74#define AD7793_CH_AIN1P_AIN1M 0 /* AIN1(+) - AIN1(-) */
75#define AD7793_CH_AIN2P_AIN2M 1 /* AIN2(+) - AIN2(-) */
76#define AD7793_CH_AIN3P_AIN3M 2 /* AIN3(+) - AIN3(-) */
77#define AD7793_CH_AIN1M_AIN1M 3 /* AIN1(-) - AIN1(-) */
78#define AD7793_CH_TEMP 6 /* Temp Sensor */
79#define AD7793_CH_AVDD_MONITOR 7 /* AVDD Monitor */
80
81/* ID Register Bit Designations (AD7793_REG_ID) */
82#define AD7792_ID 0xA
83#define AD7793_ID 0xB
84#define AD7793_ID_MASK 0xF
85
86/* IO (Excitation Current Sources) Register Bit Designations (AD7793_REG_IO) */
87#define AD7793_IO_IEXC1_IOUT1_IEXC2_IOUT2 0 /* IEXC1 connect to IOUT1,
88 * IEXC2 connect to IOUT2 */
89#define AD7793_IO_IEXC1_IOUT2_IEXC2_IOUT1 1 /* IEXC1 connect to IOUT2,
90 * IEXC2 connect to IOUT1 */
91#define AD7793_IO_IEXC1_IEXC2_IOUT1 2 /* Both current sources
92 * IEXC1,2 connect to IOUT1 */
93#define AD7793_IO_IEXC1_IEXC2_IOUT2 3 /* Both current sources
94 * IEXC1,2 connect to IOUT2 */
95
96#define AD7793_IO_IXCEN_10uA (1 << 0) /* Excitation Current 10uA */
97#define AD7793_IO_IXCEN_210uA (2 << 0) /* Excitation Current 210uA */
98#define AD7793_IO_IXCEN_1mA (3 << 0) /* Excitation Current 1mA */
99
100struct ad7793_platform_data {
101 u16 vref_mv;
102 u16 mode;
103 u16 conf;
104 u8 io;
105};
106
107#endif /* IIO_ADC_AD7793_H_ */
diff --git a/drivers/staging/iio/adc/ad7887.h b/drivers/staging/iio/adc/ad7887.h
new file mode 100644
index 00000000000..837046c7b89
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7887.h
@@ -0,0 +1,105 @@
1/*
2 * AD7887 SPI ADC driver
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8#ifndef IIO_ADC_AD7887_H_
9#define IIO_ADC_AD7887_H_
10
11#define AD7887_REF_DIS (1 << 5) /* on-chip reference disable */
12#define AD7887_DUAL (1 << 4) /* dual-channel mode */
13#define AD7887_CH_AIN1 (1 << 3) /* convert on channel 1, DUAL=1 */
14#define AD7887_CH_AIN0 (0 << 3) /* convert on channel 0, DUAL=0,1 */
15#define AD7887_PM_MODE1 (0) /* CS based shutdown */
16#define AD7887_PM_MODE2 (1) /* full on */
17#define AD7887_PM_MODE3 (2) /* auto shutdown after conversion */
18#define AD7887_PM_MODE4 (3) /* standby mode */
19
20enum ad7887_channels {
21 AD7887_CH0,
22 AD7887_CH0_CH1,
23 AD7887_CH1,
24};
25
26#define RES_MASK(bits) ((1 << (bits)) - 1) /* TODO: move this into a common header */
27
28/*
29 * TODO: struct ad7887_platform_data needs to go into include/linux/iio
30 */
31
32struct ad7887_platform_data {
33 /* External Vref voltage applied */
34 u16 vref_mv;
35 /*
36 * AD7887:
37 * In single channel mode en_dual = flase, AIN1/Vref pins assumes its
38 * Vref function. In dual channel mode en_dual = true, AIN1 becomes the
39 * second input channel, and Vref is internally connected to Vdd.
40 */
41 bool en_dual;
42 /*
43 * AD7887:
44 * use_onchip_ref = true, the Vref is internally connected to the 2.500V
45 * Voltage reference. If use_onchip_ref = false, the reference voltage
46 * is supplied by AIN1/Vref
47 */
48 bool use_onchip_ref;
49};
50
51/**
52 * struct ad7887_chip_info - chip specifc information
53 * @int_vref_mv: the internal reference voltage
54 * @channel: channel specification
55 */
56
57struct ad7887_chip_info {
58 u16 int_vref_mv;
59 struct iio_chan_spec channel[3];
60};
61
62struct ad7887_state {
63 struct spi_device *spi;
64 const struct ad7887_chip_info *chip_info;
65 struct regulator *reg;
66 size_t d_size;
67 u16 int_vref_mv;
68 struct spi_transfer xfer[4];
69 struct spi_message msg[3];
70 struct spi_message *ring_msg;
71 unsigned char tx_cmd_buf[8];
72
73 /*
74 * DMA (thus cache coherency maintenance) requires the
75 * transfer buffers to live in their own cache lines.
76 */
77
78 unsigned char data[4] ____cacheline_aligned;
79};
80
81enum ad7887_supported_device_ids {
82 ID_AD7887
83};
84
85#ifdef CONFIG_IIO_RING_BUFFER
86int ad7887_scan_from_ring(struct ad7887_state *st, long mask);
87int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev);
88void ad7887_ring_cleanup(struct iio_dev *indio_dev);
89#else /* CONFIG_IIO_RING_BUFFER */
90static inline int ad7887_scan_from_ring(struct ad7887_state *st, long mask)
91{
92 return 0;
93}
94
95static inline int
96ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev)
97{
98 return 0;
99}
100
101static inline void ad7887_ring_cleanup(struct iio_dev *indio_dev)
102{
103}
104#endif /* CONFIG_IIO_RING_BUFFER */
105#endif /* IIO_ADC_AD7887_H_ */
diff --git a/drivers/staging/iio/adc/ad7887_core.c b/drivers/staging/iio/adc/ad7887_core.c
new file mode 100644
index 00000000000..3d9121e5c37
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7887_core.c
@@ -0,0 +1,266 @@
1/*
2 * AD7887 SPI ADC driver
3 *
4 * Copyright 2010-2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/device.h>
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/sysfs.h>
13#include <linux/spi/spi.h>
14#include <linux/regulator/consumer.h>
15#include <linux/err.h>
16
17#include "../iio.h"
18#include "../sysfs.h"
19#include "../ring_generic.h"
20#include "adc.h"
21
22#include "ad7887.h"
23
24static int ad7887_scan_direct(struct ad7887_state *st, unsigned ch)
25{
26 int ret = spi_sync(st->spi, &st->msg[ch]);
27 if (ret)
28 return ret;
29
30 return (st->data[(ch * 2)] << 8) | st->data[(ch * 2) + 1];
31}
32
33static int ad7887_read_raw(struct iio_dev *dev_info,
34 struct iio_chan_spec const *chan,
35 int *val,
36 int *val2,
37 long m)
38{
39 int ret;
40 struct ad7887_state *st = iio_priv(dev_info);
41 unsigned int scale_uv;
42
43 switch (m) {
44 case 0:
45 mutex_lock(&dev_info->mlock);
46 if (iio_ring_enabled(dev_info))
47 ret = ad7887_scan_from_ring(st, 1 << chan->address);
48 else
49 ret = ad7887_scan_direct(st, chan->address);
50 mutex_unlock(&dev_info->mlock);
51
52 if (ret < 0)
53 return ret;
54 *val = (ret >> st->chip_info->channel[0].scan_type.shift) &
55 RES_MASK(st->chip_info->channel[0].scan_type.realbits);
56 return IIO_VAL_INT;
57 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
58 scale_uv = (st->int_vref_mv * 1000)
59 >> st->chip_info->channel[0].scan_type.realbits;
60 *val = scale_uv/1000;
61 *val2 = (scale_uv%1000)*1000;
62 return IIO_VAL_INT_PLUS_MICRO;
63 }
64 return -EINVAL;
65}
66
67
68static const struct ad7887_chip_info ad7887_chip_info_tbl[] = {
69 /*
70 * More devices added in future
71 */
72 [ID_AD7887] = {
73 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
74 (1 << IIO_CHAN_INFO_SCALE_SHARED),
75 1, 1, IIO_ST('u', 12, 16, 0), 0),
76
77 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
78 (1 << IIO_CHAN_INFO_SCALE_SHARED),
79 0, 0, IIO_ST('u', 12, 16, 0), 0),
80
81 .channel[2] = IIO_CHAN_SOFT_TIMESTAMP(2),
82 .int_vref_mv = 2500,
83 },
84};
85
86static const struct iio_info ad7887_info = {
87 .read_raw = &ad7887_read_raw,
88 .driver_module = THIS_MODULE,
89};
90
91static int __devinit ad7887_probe(struct spi_device *spi)
92{
93 struct ad7887_platform_data *pdata = spi->dev.platform_data;
94 struct ad7887_state *st;
95 int ret, voltage_uv = 0, regdone = 0;
96 struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
97
98 if (indio_dev == NULL)
99 return -ENOMEM;
100
101 st = iio_priv(indio_dev);
102
103 st->reg = regulator_get(&spi->dev, "vcc");
104 if (!IS_ERR(st->reg)) {
105 ret = regulator_enable(st->reg);
106 if (ret)
107 goto error_put_reg;
108
109 voltage_uv = regulator_get_voltage(st->reg);
110 }
111
112 st->chip_info =
113 &ad7887_chip_info_tbl[spi_get_device_id(spi)->driver_data];
114
115 spi_set_drvdata(spi, indio_dev);
116 st->spi = spi;
117
118 /* Estabilish that the iio_dev is a child of the spi device */
119 indio_dev->dev.parent = &spi->dev;
120 indio_dev->name = spi_get_device_id(spi)->name;
121 indio_dev->info = &ad7887_info;
122 indio_dev->modes = INDIO_DIRECT_MODE;
123
124 /* Setup default message */
125
126 st->tx_cmd_buf[0] = AD7887_CH_AIN0 | AD7887_PM_MODE4 |
127 ((pdata && pdata->use_onchip_ref) ?
128 0 : AD7887_REF_DIS);
129
130 st->xfer[0].rx_buf = &st->data[0];
131 st->xfer[0].tx_buf = &st->tx_cmd_buf[0];
132 st->xfer[0].len = 2;
133
134 spi_message_init(&st->msg[AD7887_CH0]);
135 spi_message_add_tail(&st->xfer[0], &st->msg[AD7887_CH0]);
136
137 if (pdata && pdata->en_dual) {
138 st->tx_cmd_buf[0] |= AD7887_DUAL | AD7887_REF_DIS;
139
140 st->tx_cmd_buf[2] = AD7887_CH_AIN1 | AD7887_DUAL |
141 AD7887_REF_DIS | AD7887_PM_MODE4;
142 st->tx_cmd_buf[4] = AD7887_CH_AIN0 | AD7887_DUAL |
143 AD7887_REF_DIS | AD7887_PM_MODE4;
144 st->tx_cmd_buf[6] = AD7887_CH_AIN1 | AD7887_DUAL |
145 AD7887_REF_DIS | AD7887_PM_MODE4;
146
147 st->xfer[1].rx_buf = &st->data[0];
148 st->xfer[1].tx_buf = &st->tx_cmd_buf[2];
149 st->xfer[1].len = 2;
150
151 st->xfer[2].rx_buf = &st->data[2];
152 st->xfer[2].tx_buf = &st->tx_cmd_buf[4];
153 st->xfer[2].len = 2;
154
155 spi_message_init(&st->msg[AD7887_CH0_CH1]);
156 spi_message_add_tail(&st->xfer[1], &st->msg[AD7887_CH0_CH1]);
157 spi_message_add_tail(&st->xfer[2], &st->msg[AD7887_CH0_CH1]);
158
159 st->xfer[3].rx_buf = &st->data[0];
160 st->xfer[3].tx_buf = &st->tx_cmd_buf[6];
161 st->xfer[3].len = 2;
162
163 spi_message_init(&st->msg[AD7887_CH1]);
164 spi_message_add_tail(&st->xfer[3], &st->msg[AD7887_CH1]);
165
166 if (pdata && pdata->vref_mv)
167 st->int_vref_mv = pdata->vref_mv;
168 else if (voltage_uv)
169 st->int_vref_mv = voltage_uv / 1000;
170 else
171 dev_warn(&spi->dev, "reference voltage unspecified\n");
172
173 indio_dev->channels = st->chip_info->channel;
174 indio_dev->num_channels = 3;
175 } else {
176 if (pdata && pdata->vref_mv)
177 st->int_vref_mv = pdata->vref_mv;
178 else if (pdata && pdata->use_onchip_ref)
179 st->int_vref_mv = st->chip_info->int_vref_mv;
180 else
181 dev_warn(&spi->dev, "reference voltage unspecified\n");
182
183 indio_dev->channels = &st->chip_info->channel[1];
184 indio_dev->num_channels = 2;
185 }
186
187 ret = ad7887_register_ring_funcs_and_init(indio_dev);
188 if (ret)
189 goto error_disable_reg;
190
191 ret = iio_device_register(indio_dev);
192 if (ret)
193 goto error_disable_reg;
194 regdone = 1;
195
196 ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
197 indio_dev->channels,
198 indio_dev->num_channels);
199 if (ret)
200 goto error_cleanup_ring;
201 return 0;
202
203error_cleanup_ring:
204 ad7887_ring_cleanup(indio_dev);
205error_disable_reg:
206 if (!IS_ERR(st->reg))
207 regulator_disable(st->reg);
208error_put_reg:
209 if (!IS_ERR(st->reg))
210 regulator_put(st->reg);
211 if (regdone)
212 iio_device_unregister(indio_dev);
213 else
214 iio_free_device(indio_dev);
215
216 return ret;
217}
218
219static int ad7887_remove(struct spi_device *spi)
220{
221 struct iio_dev *indio_dev = spi_get_drvdata(spi);
222 struct ad7887_state *st = iio_priv(indio_dev);
223
224 iio_ring_buffer_unregister(indio_dev->ring);
225 ad7887_ring_cleanup(indio_dev);
226 if (!IS_ERR(st->reg)) {
227 regulator_disable(st->reg);
228 regulator_put(st->reg);
229 }
230 iio_device_unregister(indio_dev);
231
232 return 0;
233}
234
235static const struct spi_device_id ad7887_id[] = {
236 {"ad7887", ID_AD7887},
237 {}
238};
239
240static struct spi_driver ad7887_driver = {
241 .driver = {
242 .name = "ad7887",
243 .bus = &spi_bus_type,
244 .owner = THIS_MODULE,
245 },
246 .probe = ad7887_probe,
247 .remove = __devexit_p(ad7887_remove),
248 .id_table = ad7887_id,
249};
250
251static int __init ad7887_init(void)
252{
253 return spi_register_driver(&ad7887_driver);
254}
255module_init(ad7887_init);
256
257static void __exit ad7887_exit(void)
258{
259 spi_unregister_driver(&ad7887_driver);
260}
261module_exit(ad7887_exit);
262
263MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
264MODULE_DESCRIPTION("Analog Devices AD7887 ADC");
265MODULE_LICENSE("GPL v2");
266MODULE_ALIAS("spi:ad7887");
diff --git a/drivers/staging/iio/adc/ad7887_ring.c b/drivers/staging/iio/adc/ad7887_ring.c
new file mode 100644
index 00000000000..0ac7c0b9d71
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7887_ring.c
@@ -0,0 +1,202 @@
1/*
2 * Copyright 2010-2011 Analog Devices Inc.
3 * Copyright (C) 2008 Jonathan Cameron
4 *
5 * Licensed under the GPL-2.
6 *
7 * ad7887_ring.c
8 */
9
10#include <linux/interrupt.h>
11#include <linux/device.h>
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/sysfs.h>
15#include <linux/spi/spi.h>
16
17#include "../iio.h"
18#include "../ring_generic.h"
19#include "../ring_sw.h"
20#include "../trigger.h"
21#include "../sysfs.h"
22
23#include "ad7887.h"
24
25int ad7887_scan_from_ring(struct ad7887_state *st, long mask)
26{
27 struct iio_ring_buffer *ring = iio_priv_to_dev(st)->ring;
28 int count = 0, ret;
29 u16 *ring_data;
30
31 if (!(ring->scan_mask & mask)) {
32 ret = -EBUSY;
33 goto error_ret;
34 }
35
36 ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
37 GFP_KERNEL);
38 if (ring_data == NULL) {
39 ret = -ENOMEM;
40 goto error_ret;
41 }
42 ret = ring->access->read_last(ring, (u8 *) ring_data);
43 if (ret)
44 goto error_free_ring_data;
45
46 /* for single channel scan the result is stored with zero offset */
47 if ((ring->scan_mask == ((1 << 1) | (1 << 0))) && (mask == (1 << 1)))
48 count = 1;
49
50 ret = be16_to_cpu(ring_data[count]);
51
52error_free_ring_data:
53 kfree(ring_data);
54error_ret:
55 return ret;
56}
57
58/**
59 * ad7887_ring_preenable() setup the parameters of the ring before enabling
60 *
61 * The complex nature of the setting of the nuber of bytes per datum is due
62 * to this driver currently ensuring that the timestamp is stored at an 8
63 * byte boundary.
64 **/
65static int ad7887_ring_preenable(struct iio_dev *indio_dev)
66{
67 struct ad7887_state *st = iio_priv(indio_dev);
68 struct iio_ring_buffer *ring = indio_dev->ring;
69
70 st->d_size = ring->scan_count *
71 st->chip_info->channel[0].scan_type.storagebits / 8;
72
73 if (ring->scan_timestamp) {
74 st->d_size += sizeof(s64);
75
76 if (st->d_size % sizeof(s64))
77 st->d_size += sizeof(s64) - (st->d_size % sizeof(s64));
78 }
79
80 if (indio_dev->ring->access->set_bytes_per_datum)
81 indio_dev->ring->access->set_bytes_per_datum(indio_dev->ring,
82 st->d_size);
83
84 switch (ring->scan_mask) {
85 case (1 << 0):
86 st->ring_msg = &st->msg[AD7887_CH0];
87 break;
88 case (1 << 1):
89 st->ring_msg = &st->msg[AD7887_CH1];
90 /* Dummy read: push CH1 setting down to hardware */
91 spi_sync(st->spi, st->ring_msg);
92 break;
93 case ((1 << 1) | (1 << 0)):
94 st->ring_msg = &st->msg[AD7887_CH0_CH1];
95 break;
96 }
97
98 return 0;
99}
100
101static int ad7887_ring_postdisable(struct iio_dev *indio_dev)
102{
103 struct ad7887_state *st = iio_priv(indio_dev);
104
105 /* dummy read: restore default CH0 settin */
106 return spi_sync(st->spi, &st->msg[AD7887_CH0]);
107}
108
109/**
110 * ad7887_trigger_handler() bh of trigger launched polling to ring buffer
111 *
112 * Currently there is no option in this driver to disable the saving of
113 * timestamps within the ring.
114 **/
115static irqreturn_t ad7887_trigger_handler(int irq, void *p)
116{
117 struct iio_poll_func *pf = p;
118 struct iio_dev *indio_dev = pf->private_data;
119 struct ad7887_state *st = iio_priv(indio_dev);
120 struct iio_ring_buffer *ring = indio_dev->ring;
121 s64 time_ns;
122 __u8 *buf;
123 int b_sent;
124
125 unsigned int bytes = ring->scan_count *
126 st->chip_info->channel[0].scan_type.storagebits / 8;
127
128 buf = kzalloc(st->d_size, GFP_KERNEL);
129 if (buf == NULL)
130 return -ENOMEM;
131
132 b_sent = spi_sync(st->spi, st->ring_msg);
133 if (b_sent)
134 goto done;
135
136 time_ns = iio_get_time_ns();
137
138 memcpy(buf, st->data, bytes);
139 if (ring->scan_timestamp)
140 memcpy(buf + st->d_size - sizeof(s64),
141 &time_ns, sizeof(time_ns));
142
143 indio_dev->ring->access->store_to(indio_dev->ring, buf, time_ns);
144done:
145 kfree(buf);
146 iio_trigger_notify_done(indio_dev->trig);
147
148 return IRQ_HANDLED;
149}
150
151static const struct iio_ring_setup_ops ad7887_ring_setup_ops = {
152 .preenable = &ad7887_ring_preenable,
153 .postenable = &iio_triggered_ring_postenable,
154 .predisable = &iio_triggered_ring_predisable,
155 .postdisable = &ad7887_ring_postdisable,
156};
157
158int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev)
159{
160 int ret;
161
162 indio_dev->ring = iio_sw_rb_allocate(indio_dev);
163 if (!indio_dev->ring) {
164 ret = -ENOMEM;
165 goto error_ret;
166 }
167 /* Effectively select the ring buffer implementation */
168 indio_dev->ring->access = &ring_sw_access_funcs;
169 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
170 &ad7887_trigger_handler,
171 IRQF_ONESHOT,
172 indio_dev,
173 "ad7887_consumer%d",
174 indio_dev->id);
175 if (indio_dev->pollfunc == NULL) {
176 ret = -ENOMEM;
177 goto error_deallocate_sw_rb;
178 }
179 /* Ring buffer functions - here trigger setup related */
180 indio_dev->ring->setup_ops = &ad7887_ring_setup_ops;
181
182 /* Flag that polled ring buffering is possible */
183 indio_dev->modes |= INDIO_RING_TRIGGERED;
184 return 0;
185
186error_deallocate_sw_rb:
187 iio_sw_rb_free(indio_dev->ring);
188error_ret:
189 return ret;
190}
191
192void ad7887_ring_cleanup(struct iio_dev *indio_dev)
193{
194 /* ensure that the trigger has been detached */
195 if (indio_dev->trig) {
196 iio_put_trigger(indio_dev->trig);
197 iio_trigger_dettach_poll_func(indio_dev->trig,
198 indio_dev->pollfunc);
199 }
200 iio_dealloc_pollfunc(indio_dev->pollfunc);
201 iio_sw_rb_free(indio_dev->ring);
202}
diff --git a/drivers/staging/iio/adc/adc.h b/drivers/staging/iio/adc/adc.h
new file mode 100644
index 00000000000..40c5949880b
--- /dev/null
+++ b/drivers/staging/iio/adc/adc.h
@@ -0,0 +1,42 @@
1/*
2 * adc.h - sysfs attributes associated with ADCs
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * Copyright (c) 2008 Jonathan Cameron <jic23@cam.ac.uk>
9 *
10 */
11
12/* Deprecated */
13#define IIO_DEV_ATTR_ADC(_num, _show, _addr) \
14 IIO_DEVICE_ATTR(adc_##_num, S_IRUGO, _show, NULL, _addr)
15
16#define IIO_DEV_ATTR_IN_RAW(_num, _show, _addr) \
17 IIO_DEVICE_ATTR(in##_num##_raw, S_IRUGO, _show, NULL, _addr)
18
19#define IIO_DEV_ATTR_IN_NAMED_RAW(_num, _name, _show, _addr) \
20 IIO_DEVICE_ATTR(in##_num##_##_name##_raw, S_IRUGO, _show, NULL, _addr)
21
22#define IIO_DEV_ATTR_IN_DIFF_RAW(_nump, _numn, _show, _addr) \
23 IIO_DEVICE_ATTR_NAMED(in##_nump##min##_numn##_raw, \
24 in##_nump-in##_numn##_raw, \
25 S_IRUGO, \
26 _show, \
27 NULL, \
28 _addr)
29
30
31#define IIO_CONST_ATTR_IN_NAMED_OFFSET(_num, _name, _string) \
32 IIO_CONST_ATTR(in##_num##_##_name##_offset, _string)
33
34#define IIO_CONST_ATTR_IN_NAMED_SCALE(_num, _name, _string) \
35 IIO_CONST_ATTR(in##_num##_##_name##_scale, _string)
36
37#define IIO_EVENT_CODE_IN_HIGH_THRESH(a) \
38 IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN, a, IIO_EV_TYPE_THRESH, \
39 IIO_EV_DIR_RISING)
40#define IIO_EVENT_CODE_IN_LOW_THRESH(a) \
41 IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN, a, IIO_EV_TYPE_THRESH, \
42 IIO_EV_DIR_FALLING)
diff --git a/drivers/staging/iio/adc/adt7310.c b/drivers/staging/iio/adc/adt7310.c
new file mode 100644
index 00000000000..1a41b803440
--- /dev/null
+++ b/drivers/staging/iio/adc/adt7310.c
@@ -0,0 +1,904 @@
1/*
2 * ADT7310 digital temperature sensor driver supporting ADT7310
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/sysfs.h>
14#include <linux/list.h>
15#include <linux/spi/spi.h>
16
17#include "../iio.h"
18#include "../sysfs.h"
19
20/*
21 * ADT7310 registers definition
22 */
23
24#define ADT7310_STATUS 0
25#define ADT7310_CONFIG 1
26#define ADT7310_TEMPERATURE 2
27#define ADT7310_ID 3
28#define ADT7310_T_CRIT 4
29#define ADT7310_T_HYST 5
30#define ADT7310_T_ALARM_HIGH 6
31#define ADT7310_T_ALARM_LOW 7
32
33/*
34 * ADT7310 status
35 */
36#define ADT7310_STAT_T_LOW 0x10
37#define ADT7310_STAT_T_HIGH 0x20
38#define ADT7310_STAT_T_CRIT 0x40
39#define ADT7310_STAT_NOT_RDY 0x80
40
41/*
42 * ADT7310 config
43 */
44#define ADT7310_FAULT_QUEUE_MASK 0x3
45#define ADT7310_CT_POLARITY 0x4
46#define ADT7310_INT_POLARITY 0x8
47#define ADT7310_EVENT_MODE 0x10
48#define ADT7310_MODE_MASK 0x60
49#define ADT7310_ONESHOT 0x20
50#define ADT7310_SPS 0x40
51#define ADT7310_PD 0x60
52#define ADT7310_RESOLUTION 0x80
53
54/*
55 * ADT7310 masks
56 */
57#define ADT7310_T16_VALUE_SIGN 0x8000
58#define ADT7310_T16_VALUE_FLOAT_OFFSET 7
59#define ADT7310_T16_VALUE_FLOAT_MASK 0x7F
60#define ADT7310_T13_VALUE_SIGN 0x1000
61#define ADT7310_T13_VALUE_OFFSET 3
62#define ADT7310_T13_VALUE_FLOAT_OFFSET 4
63#define ADT7310_T13_VALUE_FLOAT_MASK 0xF
64#define ADT7310_T_HYST_MASK 0xF
65#define ADT7310_DEVICE_ID_MASK 0x7
66#define ADT7310_MANUFACTORY_ID_MASK 0xF8
67#define ADT7310_MANUFACTORY_ID_OFFSET 3
68
69
70#define ADT7310_CMD_REG_MASK 0x28
71#define ADT7310_CMD_REG_OFFSET 3
72#define ADT7310_CMD_READ 0x40
73#define ADT7310_CMD_CON_READ 0x4
74
75#define ADT7310_IRQS 2
76
77/*
78 * struct adt7310_chip_info - chip specifc information
79 */
80
81struct adt7310_chip_info {
82 struct spi_device *spi_dev;
83 u8 config;
84};
85
86/*
87 * adt7310 register access by SPI
88 */
89
90static int adt7310_spi_read_word(struct adt7310_chip_info *chip, u8 reg, u16 *data)
91{
92 struct spi_device *spi_dev = chip->spi_dev;
93 u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK;
94 int ret = 0;
95
96 command |= ADT7310_CMD_READ;
97 ret = spi_write(spi_dev, &command, sizeof(command));
98 if (ret < 0) {
99 dev_err(&spi_dev->dev, "SPI write command error\n");
100 return ret;
101 }
102
103 ret = spi_read(spi_dev, (u8 *)data, sizeof(*data));
104 if (ret < 0) {
105 dev_err(&spi_dev->dev, "SPI read word error\n");
106 return ret;
107 }
108
109 *data = be16_to_cpu(*data);
110
111 return 0;
112}
113
114static int adt7310_spi_write_word(struct adt7310_chip_info *chip, u8 reg, u16 data)
115{
116 struct spi_device *spi_dev = chip->spi_dev;
117 u8 buf[3];
118 int ret = 0;
119
120 buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK;
121 buf[1] = (u8)(data >> 8);
122 buf[2] = (u8)(data & 0xFF);
123
124 ret = spi_write(spi_dev, buf, 3);
125 if (ret < 0) {
126 dev_err(&spi_dev->dev, "SPI write word error\n");
127 return ret;
128 }
129
130 return ret;
131}
132
133static int adt7310_spi_read_byte(struct adt7310_chip_info *chip, u8 reg, u8 *data)
134{
135 struct spi_device *spi_dev = chip->spi_dev;
136 u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK;
137 int ret = 0;
138
139 command |= ADT7310_CMD_READ;
140 ret = spi_write(spi_dev, &command, sizeof(command));
141 if (ret < 0) {
142 dev_err(&spi_dev->dev, "SPI write command error\n");
143 return ret;
144 }
145
146 ret = spi_read(spi_dev, data, sizeof(*data));
147 if (ret < 0) {
148 dev_err(&spi_dev->dev, "SPI read byte error\n");
149 return ret;
150 }
151
152 return 0;
153}
154
155static int adt7310_spi_write_byte(struct adt7310_chip_info *chip, u8 reg, u8 data)
156{
157 struct spi_device *spi_dev = chip->spi_dev;
158 u8 buf[2];
159 int ret = 0;
160
161 buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK;
162 buf[1] = data;
163
164 ret = spi_write(spi_dev, buf, 2);
165 if (ret < 0) {
166 dev_err(&spi_dev->dev, "SPI write byte error\n");
167 return ret;
168 }
169
170 return ret;
171}
172
173static ssize_t adt7310_show_mode(struct device *dev,
174 struct device_attribute *attr,
175 char *buf)
176{
177 struct iio_dev *dev_info = dev_get_drvdata(dev);
178 struct adt7310_chip_info *chip = iio_priv(dev_info);
179 u8 config;
180
181 config = chip->config & ADT7310_MODE_MASK;
182
183 switch (config) {
184 case ADT7310_PD:
185 return sprintf(buf, "power-down\n");
186 case ADT7310_ONESHOT:
187 return sprintf(buf, "one-shot\n");
188 case ADT7310_SPS:
189 return sprintf(buf, "sps\n");
190 default:
191 return sprintf(buf, "full\n");
192 }
193}
194
195static ssize_t adt7310_store_mode(struct device *dev,
196 struct device_attribute *attr,
197 const char *buf,
198 size_t len)
199{
200 struct iio_dev *dev_info = dev_get_drvdata(dev);
201 struct adt7310_chip_info *chip = iio_priv(dev_info);
202 u16 config;
203 int ret;
204
205 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
206 if (ret)
207 return -EIO;
208
209 config = chip->config & (~ADT7310_MODE_MASK);
210 if (strcmp(buf, "power-down"))
211 config |= ADT7310_PD;
212 else if (strcmp(buf, "one-shot"))
213 config |= ADT7310_ONESHOT;
214 else if (strcmp(buf, "sps"))
215 config |= ADT7310_SPS;
216
217 ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config);
218 if (ret)
219 return -EIO;
220
221 chip->config = config;
222
223 return len;
224}
225
226static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
227 adt7310_show_mode,
228 adt7310_store_mode,
229 0);
230
231static ssize_t adt7310_show_available_modes(struct device *dev,
232 struct device_attribute *attr,
233 char *buf)
234{
235 return sprintf(buf, "full\none-shot\nsps\npower-down\n");
236}
237
238static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt7310_show_available_modes, NULL, 0);
239
240static ssize_t adt7310_show_resolution(struct device *dev,
241 struct device_attribute *attr,
242 char *buf)
243{
244 struct iio_dev *dev_info = dev_get_drvdata(dev);
245 struct adt7310_chip_info *chip = iio_priv(dev_info);
246 int ret;
247 int bits;
248
249 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
250 if (ret)
251 return -EIO;
252
253 if (chip->config & ADT7310_RESOLUTION)
254 bits = 16;
255 else
256 bits = 13;
257
258 return sprintf(buf, "%d bits\n", bits);
259}
260
261static ssize_t adt7310_store_resolution(struct device *dev,
262 struct device_attribute *attr,
263 const char *buf,
264 size_t len)
265{
266 struct iio_dev *dev_info = dev_get_drvdata(dev);
267 struct adt7310_chip_info *chip = iio_priv(dev_info);
268 unsigned long data;
269 u16 config;
270 int ret;
271
272 ret = strict_strtoul(buf, 10, &data);
273 if (ret)
274 return -EINVAL;
275
276 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
277 if (ret)
278 return -EIO;
279
280 config = chip->config & (~ADT7310_RESOLUTION);
281 if (data)
282 config |= ADT7310_RESOLUTION;
283
284 ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config);
285 if (ret)
286 return -EIO;
287
288 chip->config = config;
289
290 return len;
291}
292
293static IIO_DEVICE_ATTR(resolution, S_IRUGO | S_IWUSR,
294 adt7310_show_resolution,
295 adt7310_store_resolution,
296 0);
297
298static ssize_t adt7310_show_id(struct device *dev,
299 struct device_attribute *attr,
300 char *buf)
301{
302 struct iio_dev *dev_info = dev_get_drvdata(dev);
303 struct adt7310_chip_info *chip = iio_priv(dev_info);
304 u8 id;
305 int ret;
306
307 ret = adt7310_spi_read_byte(chip, ADT7310_ID, &id);
308 if (ret)
309 return -EIO;
310
311 return sprintf(buf, "device id: 0x%x\nmanufactory id: 0x%x\n",
312 id & ADT7310_DEVICE_ID_MASK,
313 (id & ADT7310_MANUFACTORY_ID_MASK) >> ADT7310_MANUFACTORY_ID_OFFSET);
314}
315
316static IIO_DEVICE_ATTR(id, S_IRUGO | S_IWUSR,
317 adt7310_show_id,
318 NULL,
319 0);
320
321static ssize_t adt7310_convert_temperature(struct adt7310_chip_info *chip,
322 u16 data, char *buf)
323{
324 char sign = ' ';
325
326 if (chip->config & ADT7310_RESOLUTION) {
327 if (data & ADT7310_T16_VALUE_SIGN) {
328 /* convert supplement to positive value */
329 data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data);
330 sign = '-';
331 }
332 return sprintf(buf, "%c%d.%.7d\n", sign,
333 (data >> ADT7310_T16_VALUE_FLOAT_OFFSET),
334 (data & ADT7310_T16_VALUE_FLOAT_MASK) * 78125);
335 } else {
336 if (data & ADT7310_T13_VALUE_SIGN) {
337 /* convert supplement to positive value */
338 data >>= ADT7310_T13_VALUE_OFFSET;
339 data = (ADT7310_T13_VALUE_SIGN << 1) - data;
340 sign = '-';
341 }
342 return sprintf(buf, "%c%d.%.4d\n", sign,
343 (data >> ADT7310_T13_VALUE_FLOAT_OFFSET),
344 (data & ADT7310_T13_VALUE_FLOAT_MASK) * 625);
345 }
346}
347
348static ssize_t adt7310_show_value(struct device *dev,
349 struct device_attribute *attr,
350 char *buf)
351{
352 struct iio_dev *dev_info = dev_get_drvdata(dev);
353 struct adt7310_chip_info *chip = iio_priv(dev_info);
354 u8 status;
355 u16 data;
356 int ret, i = 0;
357
358 do {
359 ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status);
360 if (ret)
361 return -EIO;
362 i++;
363 if (i == 10000)
364 return -EIO;
365 } while (status & ADT7310_STAT_NOT_RDY);
366
367 ret = adt7310_spi_read_word(chip, ADT7310_TEMPERATURE, &data);
368 if (ret)
369 return -EIO;
370
371 return adt7310_convert_temperature(chip, data, buf);
372}
373
374static IIO_DEVICE_ATTR(value, S_IRUGO, adt7310_show_value, NULL, 0);
375
376static struct attribute *adt7310_attributes[] = {
377 &iio_dev_attr_available_modes.dev_attr.attr,
378 &iio_dev_attr_mode.dev_attr.attr,
379 &iio_dev_attr_resolution.dev_attr.attr,
380 &iio_dev_attr_id.dev_attr.attr,
381 &iio_dev_attr_value.dev_attr.attr,
382 NULL,
383};
384
385static const struct attribute_group adt7310_attribute_group = {
386 .attrs = adt7310_attributes,
387};
388
389static irqreturn_t adt7310_event_handler(int irq, void *private)
390{
391 struct iio_dev *indio_dev = private;
392 struct adt7310_chip_info *chip = iio_priv(indio_dev);
393 s64 timestamp = iio_get_time_ns();
394 u8 status;
395 int ret;
396
397 ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status);
398 if (ret)
399 return ret;
400
401 if (status & ADT7310_STAT_T_HIGH)
402 iio_push_event(indio_dev, 0,
403 IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
404 IIO_EV_TYPE_THRESH,
405 IIO_EV_DIR_RISING),
406 timestamp);
407 if (status & ADT7310_STAT_T_LOW)
408 iio_push_event(indio_dev, 0,
409 IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
410 IIO_EV_TYPE_THRESH,
411 IIO_EV_DIR_FALLING),
412 timestamp);
413 if (status & ADT7310_STAT_T_CRIT)
414 iio_push_event(indio_dev, 0,
415 IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
416 IIO_EV_TYPE_THRESH,
417 IIO_EV_DIR_RISING),
418 timestamp);
419 return IRQ_HANDLED;
420}
421
422static ssize_t adt7310_show_event_mode(struct device *dev,
423 struct device_attribute *attr,
424 char *buf)
425{
426 struct iio_dev *dev_info = dev_get_drvdata(dev);
427 struct adt7310_chip_info *chip = iio_priv(dev_info);
428 int ret;
429
430 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
431 if (ret)
432 return -EIO;
433
434 if (chip->config & ADT7310_EVENT_MODE)
435 return sprintf(buf, "interrupt\n");
436 else
437 return sprintf(buf, "comparator\n");
438}
439
440static ssize_t adt7310_set_event_mode(struct device *dev,
441 struct device_attribute *attr,
442 const char *buf,
443 size_t len)
444{
445 struct iio_dev *dev_info = dev_get_drvdata(dev);
446 struct adt7310_chip_info *chip = iio_priv(dev_info);
447 u16 config;
448 int ret;
449
450 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
451 if (ret)
452 return -EIO;
453
454 config = chip->config &= ~ADT7310_EVENT_MODE;
455 if (strcmp(buf, "comparator") != 0)
456 config |= ADT7310_EVENT_MODE;
457
458 ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config);
459 if (ret)
460 return -EIO;
461
462 chip->config = config;
463
464 return len;
465}
466
467static ssize_t adt7310_show_available_event_modes(struct device *dev,
468 struct device_attribute *attr,
469 char *buf)
470{
471 return sprintf(buf, "comparator\ninterrupt\n");
472}
473
474static ssize_t adt7310_show_fault_queue(struct device *dev,
475 struct device_attribute *attr,
476 char *buf)
477{
478 struct iio_dev *dev_info = dev_get_drvdata(dev);
479 struct adt7310_chip_info *chip = iio_priv(dev_info);
480 int ret;
481
482 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
483 if (ret)
484 return -EIO;
485
486 return sprintf(buf, "%d\n", chip->config & ADT7310_FAULT_QUEUE_MASK);
487}
488
489static ssize_t adt7310_set_fault_queue(struct device *dev,
490 struct device_attribute *attr,
491 const char *buf,
492 size_t len)
493{
494 struct iio_dev *dev_info = dev_get_drvdata(dev);
495 struct adt7310_chip_info *chip = iio_priv(dev_info);
496 unsigned long data;
497 int ret;
498 u8 config;
499
500 ret = strict_strtoul(buf, 10, &data);
501 if (ret || data > 3)
502 return -EINVAL;
503
504 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
505 if (ret)
506 return -EIO;
507
508 config = chip->config & ~ADT7310_FAULT_QUEUE_MASK;
509 config |= data;
510 ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config);
511 if (ret)
512 return -EIO;
513
514 chip->config = config;
515
516 return len;
517}
518
519static inline ssize_t adt7310_show_t_bound(struct device *dev,
520 struct device_attribute *attr,
521 u8 bound_reg,
522 char *buf)
523{
524 struct iio_dev *dev_info = dev_get_drvdata(dev);
525 struct adt7310_chip_info *chip = iio_priv(dev_info);
526 u16 data;
527 int ret;
528
529 ret = adt7310_spi_read_word(chip, bound_reg, &data);
530 if (ret)
531 return -EIO;
532
533 return adt7310_convert_temperature(chip, data, buf);
534}
535
536static inline ssize_t adt7310_set_t_bound(struct device *dev,
537 struct device_attribute *attr,
538 u8 bound_reg,
539 const char *buf,
540 size_t len)
541{
542 struct iio_dev *dev_info = dev_get_drvdata(dev);
543 struct adt7310_chip_info *chip = iio_priv(dev_info);
544 long tmp1, tmp2;
545 u16 data;
546 char *pos;
547 int ret;
548
549 pos = strchr(buf, '.');
550
551 ret = strict_strtol(buf, 10, &tmp1);
552
553 if (ret || tmp1 > 127 || tmp1 < -128)
554 return -EINVAL;
555
556 if (pos) {
557 len = strlen(pos);
558
559 if (chip->config & ADT7310_RESOLUTION) {
560 if (len > ADT7310_T16_VALUE_FLOAT_OFFSET)
561 len = ADT7310_T16_VALUE_FLOAT_OFFSET;
562 pos[len] = 0;
563 ret = strict_strtol(pos, 10, &tmp2);
564
565 if (!ret)
566 tmp2 = (tmp2 / 78125) * 78125;
567 } else {
568 if (len > ADT7310_T13_VALUE_FLOAT_OFFSET)
569 len = ADT7310_T13_VALUE_FLOAT_OFFSET;
570 pos[len] = 0;
571 ret = strict_strtol(pos, 10, &tmp2);
572
573 if (!ret)
574 tmp2 = (tmp2 / 625) * 625;
575 }
576 }
577
578 if (tmp1 < 0)
579 data = (u16)(-tmp1);
580 else
581 data = (u16)tmp1;
582
583 if (chip->config & ADT7310_RESOLUTION) {
584 data = (data << ADT7310_T16_VALUE_FLOAT_OFFSET) |
585 (tmp2 & ADT7310_T16_VALUE_FLOAT_MASK);
586
587 if (tmp1 < 0)
588 /* convert positive value to supplyment */
589 data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data);
590 } else {
591 data = (data << ADT7310_T13_VALUE_FLOAT_OFFSET) |
592 (tmp2 & ADT7310_T13_VALUE_FLOAT_MASK);
593
594 if (tmp1 < 0)
595 /* convert positive value to supplyment */
596 data = (ADT7310_T13_VALUE_SIGN << 1) - data;
597 data <<= ADT7310_T13_VALUE_OFFSET;
598 }
599
600 ret = adt7310_spi_write_word(chip, bound_reg, data);
601 if (ret)
602 return -EIO;
603
604 return len;
605}
606
607static ssize_t adt7310_show_t_alarm_high(struct device *dev,
608 struct device_attribute *attr,
609 char *buf)
610{
611 return adt7310_show_t_bound(dev, attr,
612 ADT7310_T_ALARM_HIGH, buf);
613}
614
615static inline ssize_t adt7310_set_t_alarm_high(struct device *dev,
616 struct device_attribute *attr,
617 const char *buf,
618 size_t len)
619{
620 return adt7310_set_t_bound(dev, attr,
621 ADT7310_T_ALARM_HIGH, buf, len);
622}
623
624static ssize_t adt7310_show_t_alarm_low(struct device *dev,
625 struct device_attribute *attr,
626 char *buf)
627{
628 return adt7310_show_t_bound(dev, attr,
629 ADT7310_T_ALARM_LOW, buf);
630}
631
632static inline ssize_t adt7310_set_t_alarm_low(struct device *dev,
633 struct device_attribute *attr,
634 const char *buf,
635 size_t len)
636{
637 return adt7310_set_t_bound(dev, attr,
638 ADT7310_T_ALARM_LOW, buf, len);
639}
640
641static ssize_t adt7310_show_t_crit(struct device *dev,
642 struct device_attribute *attr,
643 char *buf)
644{
645 return adt7310_show_t_bound(dev, attr,
646 ADT7310_T_CRIT, buf);
647}
648
649static inline ssize_t adt7310_set_t_crit(struct device *dev,
650 struct device_attribute *attr,
651 const char *buf,
652 size_t len)
653{
654 return adt7310_set_t_bound(dev, attr,
655 ADT7310_T_CRIT, buf, len);
656}
657
658static ssize_t adt7310_show_t_hyst(struct device *dev,
659 struct device_attribute *attr,
660 char *buf)
661{
662 struct iio_dev *dev_info = dev_get_drvdata(dev);
663 struct adt7310_chip_info *chip = iio_priv(dev_info);
664 int ret;
665 u8 t_hyst;
666
667 ret = adt7310_spi_read_byte(chip, ADT7310_T_HYST, &t_hyst);
668 if (ret)
669 return -EIO;
670
671 return sprintf(buf, "%d\n", t_hyst & ADT7310_T_HYST_MASK);
672}
673
674static inline ssize_t adt7310_set_t_hyst(struct device *dev,
675 struct device_attribute *attr,
676 const char *buf,
677 size_t len)
678{
679 struct iio_dev *dev_info = dev_get_drvdata(dev);
680 struct adt7310_chip_info *chip = iio_priv(dev_info);
681 int ret;
682 unsigned long data;
683 u8 t_hyst;
684
685 ret = strict_strtol(buf, 10, &data);
686
687 if (ret || data > ADT7310_T_HYST_MASK)
688 return -EINVAL;
689
690 t_hyst = (u8)data;
691
692 ret = adt7310_spi_write_byte(chip, ADT7310_T_HYST, t_hyst);
693 if (ret)
694 return -EIO;
695
696 return len;
697}
698
699static IIO_DEVICE_ATTR(event_mode,
700 S_IRUGO | S_IWUSR,
701 adt7310_show_event_mode, adt7310_set_event_mode, 0);
702static IIO_DEVICE_ATTR(available_event_modes,
703 S_IRUGO | S_IWUSR,
704 adt7310_show_available_event_modes, NULL, 0);
705static IIO_DEVICE_ATTR(fault_queue,
706 S_IRUGO | S_IWUSR,
707 adt7310_show_fault_queue, adt7310_set_fault_queue, 0);
708static IIO_DEVICE_ATTR(t_alarm_high,
709 S_IRUGO | S_IWUSR,
710 adt7310_show_t_alarm_high, adt7310_set_t_alarm_high, 0);
711static IIO_DEVICE_ATTR(t_alarm_low,
712 S_IRUGO | S_IWUSR,
713 adt7310_show_t_alarm_low, adt7310_set_t_alarm_low, 0);
714static IIO_DEVICE_ATTR(t_crit,
715 S_IRUGO | S_IWUSR,
716 adt7310_show_t_crit, adt7310_set_t_crit, 0);
717static IIO_DEVICE_ATTR(t_hyst,
718 S_IRUGO | S_IWUSR,
719 adt7310_show_t_hyst, adt7310_set_t_hyst, 0);
720
721static struct attribute *adt7310_event_int_attributes[] = {
722 &iio_dev_attr_event_mode.dev_attr.attr,
723 &iio_dev_attr_available_event_modes.dev_attr.attr,
724 &iio_dev_attr_fault_queue.dev_attr.attr,
725 &iio_dev_attr_t_alarm_high.dev_attr.attr,
726 &iio_dev_attr_t_alarm_low.dev_attr.attr,
727 &iio_dev_attr_t_hyst.dev_attr.attr,
728 NULL,
729};
730
731static struct attribute *adt7310_event_ct_attributes[] = {
732 &iio_dev_attr_event_mode.dev_attr.attr,
733 &iio_dev_attr_available_event_modes.dev_attr.attr,
734 &iio_dev_attr_fault_queue.dev_attr.attr,
735 &iio_dev_attr_t_crit.dev_attr.attr,
736 &iio_dev_attr_t_hyst.dev_attr.attr,
737 NULL,
738};
739
740static struct attribute_group adt7310_event_attribute_group[ADT7310_IRQS] = {
741 {
742 .attrs = adt7310_event_int_attributes,
743 }, {
744 .attrs = adt7310_event_ct_attributes,
745 }
746};
747
748static const struct iio_info adt7310_info = {
749 .attrs = &adt7310_attribute_group,
750 .num_interrupt_lines = ADT7310_IRQS,
751 .event_attrs = adt7310_event_attribute_group,
752 .driver_module = THIS_MODULE,
753};
754
755/*
756 * device probe and remove
757 */
758
759static int __devinit adt7310_probe(struct spi_device *spi_dev)
760{
761 struct adt7310_chip_info *chip;
762 struct iio_dev *indio_dev;
763 int ret = 0;
764 unsigned long *adt7310_platform_data = spi_dev->dev.platform_data;
765 unsigned long irq_flags;
766
767 indio_dev = iio_allocate_device(sizeof(*chip));
768 if (indio_dev == NULL) {
769 ret = -ENOMEM;
770 goto error_ret;
771 }
772 chip = iio_priv(indio_dev);
773 /* this is only used for device removal purposes */
774 dev_set_drvdata(&spi_dev->dev, indio_dev);
775
776 chip->spi_dev = spi_dev;
777
778 indio_dev->dev.parent = &spi_dev->dev;
779 indio_dev->name = spi_get_device_id(spi_dev)->name;
780 indio_dev->info = &adt7310_info;
781 indio_dev->modes = INDIO_DIRECT_MODE;
782
783 ret = iio_device_register(indio_dev);
784 if (ret)
785 goto error_free_dev;
786
787 /* CT critcal temperature event. line 0 */
788 if (spi_dev->irq) {
789 if (adt7310_platform_data[2])
790 irq_flags = adt7310_platform_data[2];
791 else
792 irq_flags = IRQF_TRIGGER_LOW;
793 ret = request_threaded_irq(spi_dev->irq,
794 NULL,
795 &adt7310_event_handler,
796 irq_flags,
797 indio_dev->name,
798 indio_dev);
799 if (ret)
800 goto error_unreg_dev;
801 }
802
803 /* INT bound temperature alarm event. line 1 */
804 if (adt7310_platform_data[0]) {
805 ret = request_threaded_irq(adt7310_platform_data[0],
806 NULL,
807 &adt7310_event_handler,
808 adt7310_platform_data[1],
809 indio_dev->name,
810 indio_dev);
811 if (ret)
812 goto error_unreg_ct_irq;
813 }
814
815 if (spi_dev->irq && adt7310_platform_data[0]) {
816 ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
817 if (ret) {
818 ret = -EIO;
819 goto error_unreg_int_irq;
820 }
821
822 /* set irq polarity low level */
823 chip->config &= ~ADT7310_CT_POLARITY;
824
825 if (adt7310_platform_data[1] & IRQF_TRIGGER_HIGH)
826 chip->config |= ADT7310_INT_POLARITY;
827 else
828 chip->config &= ~ADT7310_INT_POLARITY;
829
830 ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, chip->config);
831 if (ret) {
832 ret = -EIO;
833 goto error_unreg_int_irq;
834 }
835 }
836
837 dev_info(&spi_dev->dev, "%s temperature sensor registered.\n",
838 indio_dev->name);
839
840 return 0;
841
842error_unreg_int_irq:
843 free_irq(adt7310_platform_data[0], indio_dev);
844error_unreg_ct_irq:
845 free_irq(spi_dev->irq, indio_dev);
846error_unreg_dev:
847 iio_device_unregister(indio_dev);
848error_free_dev:
849 iio_free_device(indio_dev);
850error_ret:
851 return ret;
852}
853
854static int __devexit adt7310_remove(struct spi_device *spi_dev)
855{
856 struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev);
857 unsigned long *adt7310_platform_data = spi_dev->dev.platform_data;
858
859 dev_set_drvdata(&spi_dev->dev, NULL);
860 if (adt7310_platform_data[0])
861 free_irq(adt7310_platform_data[0], indio_dev);
862 if (spi_dev->irq)
863 free_irq(spi_dev->irq, indio_dev);
864 iio_device_unregister(indio_dev);
865 iio_free_device(indio_dev);
866
867 return 0;
868}
869
870static const struct spi_device_id adt7310_id[] = {
871 { "adt7310", 0 },
872 {}
873};
874
875MODULE_DEVICE_TABLE(spi, adt7310_id);
876
877static struct spi_driver adt7310_driver = {
878 .driver = {
879 .name = "adt7310",
880 .bus = &spi_bus_type,
881 .owner = THIS_MODULE,
882 },
883 .probe = adt7310_probe,
884 .remove = __devexit_p(adt7310_remove),
885 .id_table = adt7310_id,
886};
887
888static __init int adt7310_init(void)
889{
890 return spi_register_driver(&adt7310_driver);
891}
892
893static __exit void adt7310_exit(void)
894{
895 spi_unregister_driver(&adt7310_driver);
896}
897
898MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
899MODULE_DESCRIPTION("Analog Devices ADT7310 digital"
900 " temperature sensor driver");
901MODULE_LICENSE("GPL v2");
902
903module_init(adt7310_init);
904module_exit(adt7310_exit);
diff --git a/drivers/staging/iio/adc/adt75.c b/drivers/staging/iio/adc/adt75.c
new file mode 100644
index 00000000000..38f141de6a4
--- /dev/null
+++ b/drivers/staging/iio/adc/adt75.c
@@ -0,0 +1,657 @@
1/*
2 * ADT75 digital temperature sensor driver supporting ADT75
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/sysfs.h>
14#include <linux/i2c.h>
15
16#include "../iio.h"
17#include "../sysfs.h"
18
19/*
20 * ADT75 registers definition
21 */
22
23#define ADT75_TEMPERATURE 0
24#define ADT75_CONFIG 1
25#define ADT75_T_HYST 2
26#define ADT75_T_OS 3
27#define ADT75_ONESHOT 4
28
29/*
30 * ADT75 config
31 */
32#define ADT75_PD 0x1
33#define ADT75_OS_INT 0x2
34#define ADT75_OS_POLARITY 0x4
35#define ADT75_FAULT_QUEUE_MASK 0x18
36#define ADT75_FAULT_QUEUE_OFFSET 3
37#define ADT75_SMBUS_ALART 0x8
38
39/*
40 * ADT75 masks
41 */
42#define ADT75_VALUE_SIGN 0x800
43#define ADT75_VALUE_OFFSET 4
44#define ADT75_VALUE_FLOAT_OFFSET 4
45#define ADT75_VALUE_FLOAT_MASK 0xF
46
47
48/*
49 * struct adt75_chip_info - chip specifc information
50 */
51
52struct adt75_chip_info {
53 struct i2c_client *client;
54 u8 config;
55};
56
57/*
58 * adt75 register access by I2C
59 */
60
61static int adt75_i2c_read(struct iio_dev *dev_info, u8 reg, u8 *data)
62{
63 struct adt75_chip_info *chip = iio_priv(dev_info);
64 struct i2c_client *client = chip->client;
65 int ret = 0, len;
66
67 ret = i2c_smbus_write_byte(client, reg);
68 if (ret < 0) {
69 dev_err(&client->dev, "I2C read register address error\n");
70 return ret;
71 }
72
73 if (reg == ADT75_CONFIG || reg == ADT75_ONESHOT)
74 len = 1;
75 else
76 len = 2;
77
78 ret = i2c_master_recv(client, data, len);
79 if (ret < 0) {
80 dev_err(&client->dev, "I2C read error\n");
81 return ret;
82 }
83
84 return ret;
85}
86
87static int adt75_i2c_write(struct iio_dev *dev_info, u8 reg, u8 data)
88{
89 struct adt75_chip_info *chip = iio_priv(dev_info);
90 struct i2c_client *client = chip->client;
91 int ret = 0;
92
93 if (reg == ADT75_CONFIG || reg == ADT75_ONESHOT)
94 ret = i2c_smbus_write_byte_data(client, reg, data);
95 else
96 ret = i2c_smbus_write_word_data(client, reg, data);
97
98 if (ret < 0)
99 dev_err(&client->dev, "I2C write error\n");
100
101 return ret;
102}
103
104static ssize_t adt75_show_mode(struct device *dev,
105 struct device_attribute *attr,
106 char *buf)
107{
108 struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));
109
110 if (chip->config & ADT75_PD)
111 return sprintf(buf, "power-save\n");
112 else
113 return sprintf(buf, "full\n");
114}
115
116static ssize_t adt75_store_mode(struct device *dev,
117 struct device_attribute *attr,
118 const char *buf,
119 size_t len)
120{
121 struct iio_dev *dev_info = dev_get_drvdata(dev);
122 struct adt75_chip_info *chip = iio_priv(dev_info);
123 int ret;
124 u8 config;
125
126 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
127 if (ret)
128 return -EIO;
129
130 config = chip->config & ~ADT75_PD;
131 if (!strcmp(buf, "full"))
132 config |= ADT75_PD;
133
134 ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
135 if (ret)
136 return -EIO;
137
138 chip->config = config;
139
140 return ret;
141}
142
143static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
144 adt75_show_mode,
145 adt75_store_mode,
146 0);
147
148static ssize_t adt75_show_available_modes(struct device *dev,
149 struct device_attribute *attr,
150 char *buf)
151{
152 return sprintf(buf, "full\npower-down\n");
153}
154
155static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt75_show_available_modes, NULL, 0);
156
157static ssize_t adt75_show_oneshot(struct device *dev,
158 struct device_attribute *attr,
159 char *buf)
160{
161 struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));
162
163 return sprintf(buf, "%d\n", !!(chip->config & ADT75_ONESHOT));
164}
165
166static ssize_t adt75_store_oneshot(struct device *dev,
167 struct device_attribute *attr,
168 const char *buf,
169 size_t len)
170{
171 struct iio_dev *dev_info = dev_get_drvdata(dev);
172 struct adt75_chip_info *chip = iio_priv(dev_info);
173 unsigned long data = 0;
174 int ret;
175 u8 config;
176
177 ret = strict_strtoul(buf, 10, &data);
178 if (ret)
179 return -EINVAL;
180
181
182 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
183 if (ret)
184 return -EIO;
185
186 config = chip->config & ~ADT75_ONESHOT;
187 if (data)
188 config |= ADT75_ONESHOT;
189
190 ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
191 if (ret)
192 return -EIO;
193
194 chip->config = config;
195
196 return ret;
197}
198
199static IIO_DEVICE_ATTR(oneshot, S_IRUGO | S_IWUSR,
200 adt75_show_oneshot,
201 adt75_store_oneshot,
202 0);
203
204static ssize_t adt75_show_value(struct device *dev,
205 struct device_attribute *attr,
206 char *buf)
207{
208 struct iio_dev *dev_info = dev_get_drvdata(dev);
209 struct adt75_chip_info *chip = iio_priv(dev_info);
210 u16 data;
211 char sign = ' ';
212 int ret;
213
214 if (chip->config & ADT75_PD) {
215 dev_err(dev, "Can't read value in power-down mode.\n");
216 return -EIO;
217 }
218
219 if (chip->config & ADT75_ONESHOT) {
220 /* write to active converter */
221 ret = i2c_smbus_write_byte(chip->client, ADT75_ONESHOT);
222 if (ret)
223 return -EIO;
224 }
225
226 ret = adt75_i2c_read(dev_info, ADT75_TEMPERATURE, (u8 *)&data);
227 if (ret)
228 return -EIO;
229
230 data = swab16(data) >> ADT75_VALUE_OFFSET;
231 if (data & ADT75_VALUE_SIGN) {
232 /* convert supplement to positive value */
233 data = (ADT75_VALUE_SIGN << 1) - data;
234 sign = '-';
235 }
236
237 return sprintf(buf, "%c%d.%.4d\n", sign,
238 (data >> ADT75_VALUE_FLOAT_OFFSET),
239 (data & ADT75_VALUE_FLOAT_MASK) * 625);
240}
241
242static IIO_DEVICE_ATTR(value, S_IRUGO, adt75_show_value, NULL, 0);
243
244static struct attribute *adt75_attributes[] = {
245 &iio_dev_attr_available_modes.dev_attr.attr,
246 &iio_dev_attr_mode.dev_attr.attr,
247 &iio_dev_attr_oneshot.dev_attr.attr,
248 &iio_dev_attr_value.dev_attr.attr,
249 NULL,
250};
251
252static const struct attribute_group adt75_attribute_group = {
253 .attrs = adt75_attributes,
254};
255
256/*
257 * temperature bound events
258 */
259
260#define IIO_EVENT_CODE_ADT75_OTI IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_TEMP, \
261 0, \
262 IIO_EV_TYPE_THRESH, \
263 IIO_EV_DIR_FALLING)
264
265static irqreturn_t adt75_event_handler(int irq, void *private)
266{
267 iio_push_event(private, 0,
268 IIO_EVENT_CODE_ADT75_OTI,
269 iio_get_time_ns());
270
271 return IRQ_HANDLED;
272}
273
274static ssize_t adt75_show_oti_mode(struct device *dev,
275 struct device_attribute *attr,
276 char *buf)
277{
278 struct iio_dev *dev_info = dev_get_drvdata(dev);
279 struct adt75_chip_info *chip = iio_priv(dev_info);
280 int ret;
281
282 /* retrive ALART status */
283 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
284 if (ret)
285 return -EIO;
286
287 if (chip->config & ADT75_OS_INT)
288 return sprintf(buf, "interrupt\n");
289 else
290 return sprintf(buf, "comparator\n");
291}
292
293static ssize_t adt75_set_oti_mode(struct device *dev,
294 struct device_attribute *attr,
295 const char *buf,
296 size_t len)
297{
298 struct iio_dev *dev_info = dev_get_drvdata(dev);
299 struct adt75_chip_info *chip = iio_priv(dev_info);
300 int ret;
301 u8 config;
302
303 /* retrive ALART status */
304 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
305 if (ret)
306 return -EIO;
307
308 config = chip->config & ~ADT75_OS_INT;
309 if (strcmp(buf, "comparator") != 0)
310 config |= ADT75_OS_INT;
311
312 ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
313 if (ret)
314 return -EIO;
315
316 chip->config = config;
317
318 return ret;
319}
320
321static ssize_t adt75_show_available_oti_modes(struct device *dev,
322 struct device_attribute *attr,
323 char *buf)
324{
325 return sprintf(buf, "comparator\ninterrupt\n");
326}
327
328static ssize_t adt75_show_smbus_alart(struct device *dev,
329 struct device_attribute *attr,
330 char *buf)
331{
332 struct iio_dev *dev_info = dev_get_drvdata(dev);
333 struct adt75_chip_info *chip = iio_priv(dev_info);
334 int ret;
335
336 /* retrive ALART status */
337 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
338 if (ret)
339 return -EIO;
340
341 return sprintf(buf, "%d\n", !!(chip->config & ADT75_SMBUS_ALART));
342}
343
344static ssize_t adt75_set_smbus_alart(struct device *dev,
345 struct device_attribute *attr,
346 const char *buf,
347 size_t len)
348{
349 struct iio_dev *dev_info = dev_get_drvdata(dev);
350 struct adt75_chip_info *chip = iio_priv(dev_info);
351 unsigned long data = 0;
352 int ret;
353 u8 config;
354
355 ret = strict_strtoul(buf, 10, &data);
356 if (ret)
357 return -EINVAL;
358
359 /* retrive ALART status */
360 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
361 if (ret)
362 return -EIO;
363
364 config = chip->config & ~ADT75_SMBUS_ALART;
365 if (data)
366 config |= ADT75_SMBUS_ALART;
367
368 ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
369 if (ret)
370 return -EIO;
371
372 chip->config = config;
373
374 return ret;
375}
376
377static ssize_t adt75_show_fault_queue(struct device *dev,
378 struct device_attribute *attr,
379 char *buf)
380{
381 struct iio_dev *dev_info = dev_get_drvdata(dev);
382 struct adt75_chip_info *chip = iio_priv(dev_info);
383 int ret;
384
385 /* retrive ALART status */
386 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
387 if (ret)
388 return -EIO;
389
390 return sprintf(buf, "%d\n", (chip->config & ADT75_FAULT_QUEUE_MASK) >>
391 ADT75_FAULT_QUEUE_OFFSET);
392}
393
394static ssize_t adt75_set_fault_queue(struct device *dev,
395 struct device_attribute *attr,
396 const char *buf,
397 size_t len)
398{
399 struct iio_dev *dev_info = dev_get_drvdata(dev);
400 struct adt75_chip_info *chip = iio_priv(dev_info);
401 unsigned long data;
402 int ret;
403 u8 config;
404
405 ret = strict_strtoul(buf, 10, &data);
406 if (ret || data > 3)
407 return -EINVAL;
408
409 /* retrive ALART status */
410 ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
411 if (ret)
412 return -EIO;
413
414 config = chip->config & ~ADT75_FAULT_QUEUE_MASK;
415 config |= (data << ADT75_FAULT_QUEUE_OFFSET);
416 ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
417 if (ret)
418 return -EIO;
419
420 chip->config = config;
421
422 return ret;
423}
424static inline ssize_t adt75_show_t_bound(struct device *dev,
425 struct device_attribute *attr,
426 char *buf)
427{
428 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
429 struct iio_dev *dev_info = dev_get_drvdata(dev);
430 u16 data;
431 char sign = ' ';
432 int ret;
433
434 ret = adt75_i2c_read(dev_info, this_attr->address, (u8 *)&data);
435 if (ret)
436 return -EIO;
437
438 data = swab16(data) >> ADT75_VALUE_OFFSET;
439 if (data & ADT75_VALUE_SIGN) {
440 /* convert supplement to positive value */
441 data = (ADT75_VALUE_SIGN << 1) - data;
442 sign = '-';
443 }
444
445 return sprintf(buf, "%c%d.%.4d\n", sign,
446 (data >> ADT75_VALUE_FLOAT_OFFSET),
447 (data & ADT75_VALUE_FLOAT_MASK) * 625);
448}
449
450static inline ssize_t adt75_set_t_bound(struct device *dev,
451 struct device_attribute *attr,
452 const char *buf,
453 size_t len)
454{
455 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
456 struct iio_dev *dev_info = dev_get_drvdata(dev);
457 long tmp1, tmp2;
458 u16 data;
459 char *pos;
460 int ret;
461
462 pos = strchr(buf, '.');
463
464 ret = strict_strtol(buf, 10, &tmp1);
465
466 if (ret || tmp1 > 127 || tmp1 < -128)
467 return -EINVAL;
468
469 if (pos) {
470 len = strlen(pos);
471 if (len > ADT75_VALUE_FLOAT_OFFSET)
472 len = ADT75_VALUE_FLOAT_OFFSET;
473 pos[len] = 0;
474 ret = strict_strtol(pos, 10, &tmp2);
475
476 if (!ret)
477 tmp2 = (tmp2 / 625) * 625;
478 }
479
480 if (tmp1 < 0)
481 data = (u16)(-tmp1);
482 else
483 data = (u16)tmp1;
484 data = (data << ADT75_VALUE_FLOAT_OFFSET) | (tmp2 & ADT75_VALUE_FLOAT_MASK);
485 if (tmp1 < 0)
486 /* convert positive value to supplyment */
487 data = (ADT75_VALUE_SIGN << 1) - data;
488 data <<= ADT75_VALUE_OFFSET;
489 data = swab16(data);
490
491 ret = adt75_i2c_write(dev_info, this_attr->address, (u8)data);
492 if (ret)
493 return -EIO;
494
495 return ret;
496}
497
498
499static IIO_DEVICE_ATTR(oti_mode,
500 S_IRUGO | S_IWUSR,
501 adt75_show_oti_mode, adt75_set_oti_mode, 0);
502static IIO_DEVICE_ATTR(available_oti_modes,
503 S_IRUGO,
504 adt75_show_available_oti_modes, NULL, 0);
505static IIO_DEVICE_ATTR(smbus_alart,
506 S_IRUGO | S_IWUSR,
507 adt75_show_smbus_alart, adt75_set_smbus_alart, 0);
508static IIO_DEVICE_ATTR(fault_queue,
509 S_IRUGO | S_IWUSR,
510 adt75_show_fault_queue, adt75_set_fault_queue, 0);
511static IIO_DEVICE_ATTR(t_os_value,
512 S_IRUGO | S_IWUSR,
513 adt75_show_t_bound, adt75_set_t_bound,
514 ADT75_T_OS);
515static IIO_DEVICE_ATTR(t_hyst_value,
516 S_IRUGO | S_IWUSR,
517 adt75_show_t_bound, adt75_set_t_bound,
518 ADT75_T_HYST);
519
520static struct attribute *adt75_event_attributes[] = {
521 &iio_dev_attr_oti_mode.dev_attr.attr,
522 &iio_dev_attr_available_oti_modes.dev_attr.attr,
523 &iio_dev_attr_smbus_alart.dev_attr.attr,
524 &iio_dev_attr_fault_queue.dev_attr.attr,
525 &iio_dev_attr_t_os_value.dev_attr.attr,
526 &iio_dev_attr_t_hyst_value.dev_attr.attr,
527 NULL,
528};
529
530static struct attribute_group adt75_event_attribute_group = {
531 .attrs = adt75_event_attributes,
532};
533
534static const struct iio_info adt75_info = {
535 .attrs = &adt75_attribute_group,
536 .num_interrupt_lines = 1,
537 .event_attrs = &adt75_event_attribute_group,
538 .driver_module = THIS_MODULE,
539};
540
541/*
542 * device probe and remove
543 */
544
545static int __devinit adt75_probe(struct i2c_client *client,
546 const struct i2c_device_id *id)
547{
548 struct adt75_chip_info *chip;
549 struct iio_dev *indio_dev;
550 int ret = 0;
551
552 indio_dev = iio_allocate_device(sizeof(*chip));
553 if (indio_dev == NULL) {
554 ret = -ENOMEM;
555 goto error_ret;
556 }
557 chip = iio_priv(indio_dev);
558
559 /* this is only used for device removal purposes */
560 i2c_set_clientdata(client, indio_dev);
561
562 chip->client = client;
563
564 indio_dev->name = id->name;
565 indio_dev->dev.parent = &client->dev;
566 indio_dev->info = &adt75_info;
567 indio_dev->modes = INDIO_DIRECT_MODE;
568
569 ret = iio_device_register(indio_dev);
570 if (ret)
571 goto error_free_dev;
572
573 if (client->irq > 0) {
574 ret = request_threaded_irq(client->irq,
575 NULL,
576 &adt75_event_handler,
577 IRQF_TRIGGER_LOW,
578 indio_dev->name,
579 indio_dev);
580 if (ret)
581 goto error_unreg_dev;
582
583 ret = adt75_i2c_read(indio_dev, ADT75_CONFIG, &chip->config);
584 if (ret) {
585 ret = -EIO;
586 goto error_unreg_irq;
587 }
588
589 /* set irq polarity low level */
590 chip->config &= ~ADT75_OS_POLARITY;
591
592 ret = adt75_i2c_write(indio_dev, ADT75_CONFIG, chip->config);
593 if (ret) {
594 ret = -EIO;
595 goto error_unreg_irq;
596 }
597 }
598
599 dev_info(&client->dev, "%s temperature sensor registered.\n",
600 indio_dev->name);
601
602 return 0;
603error_unreg_irq:
604 free_irq(client->irq, indio_dev);
605error_unreg_dev:
606 iio_device_unregister(indio_dev);
607error_free_dev:
608 iio_free_device(indio_dev);
609error_ret:
610 return ret;
611}
612
613static int __devexit adt75_remove(struct i2c_client *client)
614{
615 struct iio_dev *indio_dev = i2c_get_clientdata(client);
616
617 if (client->irq)
618 free_irq(client->irq, indio_dev);
619 iio_device_unregister(indio_dev);
620 iio_free_device(indio_dev);
621
622 return 0;
623}
624
625static const struct i2c_device_id adt75_id[] = {
626 { "adt75", 0 },
627 {}
628};
629
630MODULE_DEVICE_TABLE(i2c, adt75_id);
631
632static struct i2c_driver adt75_driver = {
633 .driver = {
634 .name = "adt75",
635 },
636 .probe = adt75_probe,
637 .remove = __devexit_p(adt75_remove),
638 .id_table = adt75_id,
639};
640
641static __init int adt75_init(void)
642{
643 return i2c_add_driver(&adt75_driver);
644}
645
646static __exit void adt75_exit(void)
647{
648 i2c_del_driver(&adt75_driver);
649}
650
651MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
652MODULE_DESCRIPTION("Analog Devices ADT75 digital"
653 " temperature sensor driver");
654MODULE_LICENSE("GPL v2");
655
656module_init(adt75_init);
657module_exit(adt75_exit);
diff --git a/drivers/staging/iio/adc/max1363.h b/drivers/staging/iio/adc/max1363.h
new file mode 100644
index 00000000000..360bfc5398f
--- /dev/null
+++ b/drivers/staging/iio/adc/max1363.h
@@ -0,0 +1,175 @@
1#ifndef _MAX1363_H_
2#define _MAX1363_H_
3
4#define MAX1363_SETUP_BYTE(a) ((a) | 0x80)
5
6/* There is a fair bit more defined here than currently
7 * used, but the intention is to support everything these
8 * chips do in the long run */
9
10/* see data sheets */
11/* max1363 and max1236, max1237, max1238, max1239 */
12#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD 0x00
13#define MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF 0x20
14#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT 0x40
15#define MAX1363_SETUP_AIN3_IS_REF_REF_IS_INT 0x60
16#define MAX1363_SETUP_POWER_UP_INT_REF 0x10
17#define MAX1363_SETUP_POWER_DOWN_INT_REF 0x00
18
19/* think about includeing max11600 etc - more settings */
20#define MAX1363_SETUP_EXT_CLOCK 0x08
21#define MAX1363_SETUP_INT_CLOCK 0x00
22#define MAX1363_SETUP_UNIPOLAR 0x00
23#define MAX1363_SETUP_BIPOLAR 0x04
24#define MAX1363_SETUP_RESET 0x00
25#define MAX1363_SETUP_NORESET 0x02
26/* max1363 only - though don't care on others.
27 * For now monitor modes are not implemented as the relevant
28 * line is not connected on my test board.
29 * The definitions are here as I intend to add this soon.
30 */
31#define MAX1363_SETUP_MONITOR_SETUP 0x01
32
33/* Specific to the max1363 */
34#define MAX1363_MON_RESET_CHAN(a) (1 << ((a) + 4))
35#define MAX1363_MON_INT_ENABLE 0x01
36
37/* defined for readability reasons */
38/* All chips */
39#define MAX1363_CONFIG_BYTE(a) ((a))
40
41#define MAX1363_CONFIG_SE 0x01
42#define MAX1363_CONFIG_DE 0x00
43#define MAX1363_CONFIG_SCAN_TO_CS 0x00
44#define MAX1363_CONFIG_SCAN_SINGLE_8 0x20
45#define MAX1363_CONFIG_SCAN_MONITOR_MODE 0x40
46#define MAX1363_CONFIG_SCAN_SINGLE_1 0x60
47/* max123{6-9} only */
48#define MAX1236_SCAN_MID_TO_CHANNEL 0x40
49
50/* max1363 only - merely part of channel selects or don't care for others*/
51#define MAX1363_CONFIG_EN_MON_MODE_READ 0x18
52
53#define MAX1363_CHANNEL_SEL(a) ((a) << 1)
54
55/* max1363 strictly 0x06 - but doesn't matter */
56#define MAX1363_CHANNEL_SEL_MASK 0x1E
57#define MAX1363_SCAN_MASK 0x60
58#define MAX1363_SE_DE_MASK 0x01
59
60/**
61 * struct max1363_mode - scan mode information
62 * @conf: The corresponding value of the configuration register
63 * @modemask: Bit mask corresponding to channels enabled in this mode
64 */
65struct max1363_mode {
66 int8_t conf;
67 long modemask;
68};
69
70/* This must be maintained along side the max1363_mode_table in max1363_core */
71enum max1363_modes {
72 /* Single read of a single channel */
73 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11,
74 /* Differential single read */
75 d0m1, d2m3, d4m5, d6m7, d8m9, d10m11,
76 d1m0, d3m2, d5m4, d7m6, d9m8, d11m10,
77 /* Scan to channel and mid to channel where overlapping */
78 s0to1, s0to2, s2to3, s0to3, s0to4, s0to5, s0to6,
79 s6to7, s0to7, s6to8, s0to8, s6to9,
80 s0to9, s6to10, s0to10, s6to11, s0to11,
81 /* Differential scan to channel and mid to channel where overlapping */
82 d0m1to2m3, d0m1to4m5, d0m1to6m7, d6m7to8m9,
83 d0m1to8m9, d6m7to10m11, d0m1to10m11, d1m0to3m2,
84 d1m0to5m4, d1m0to7m6, d7m6to9m8, d1m0to9m8,
85 d7m6to11m10, d1m0to11m10,
86};
87
88/**
89 * struct max1363_chip_info - chip specifc information
90 * @name: indentification string for chip
91 * @bits: accuracy of the adc in bits
92 * @int_vref_mv: the internal reference voltage
93 * @info: iio core function callbacks structure
94 * @mode_list: array of available scan modes
95 * @num_modes: the number of scan modes available
96 * @default_mode: the scan mode in which the chip starts up
97 * @channel: channel specification
98 * @num_channels: number of channels
99 */
100struct max1363_chip_info {
101 const struct iio_info *info;
102 struct iio_chan_spec *channels;
103 int num_channels;
104 const enum max1363_modes *mode_list;
105 enum max1363_modes default_mode;
106 u16 int_vref_mv;
107 u8 num_modes;
108 u8 bits;
109};
110
111/**
112 * struct max1363_state - driver instance specific data
113 * @client: i2c_client
114 * @setupbyte: cache of current device setup byte
115 * @configbyte: cache of current device config byte
116 * @chip_info: chip model specific constants, available modes etc
117 * @current_mode: the scan mode of this chip
118 * @requestedmask: a valid requested set of channels
119 * @reg: supply regulator
120 * @monitor_on: whether monitor mode is enabled
121 * @monitor_speed: parameter corresponding to device monitor speed setting
122 * @mask_high: bitmask for enabled high thresholds
123 * @mask_low: bitmask for enabled low thresholds
124 * @thresh_high: high threshold values
125 * @thresh_low: low threshold values
126 */
127struct max1363_state {
128 struct i2c_client *client;
129 u8 setupbyte;
130 u8 configbyte;
131 const struct max1363_chip_info *chip_info;
132 const struct max1363_mode *current_mode;
133 u32 requestedmask;
134 struct regulator *reg;
135
136 /* Using monitor modes and buffer at the same time is
137 currently not supported */
138 bool monitor_on;
139 unsigned int monitor_speed:3;
140 u8 mask_high;
141 u8 mask_low;
142 /* 4x unipolar first then the fours bipolar ones */
143 s16 thresh_high[8];
144 s16 thresh_low[8];
145};
146
147const struct max1363_mode
148*max1363_match_mode(u32 mask, const struct max1363_chip_info *ci);
149
150int max1363_set_scan_mode(struct max1363_state *st);
151
152#ifdef CONFIG_MAX1363_RING_BUFFER
153
154int max1363_single_channel_from_ring(long mask, struct max1363_state *st);
155int max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev);
156void max1363_ring_cleanup(struct iio_dev *indio_dev);
157
158#else /* CONFIG_MAX1363_RING_BUFFER */
159
160int max1363_single_channel_from_ring(long mask, struct max1363_state *st)
161{
162 return -EINVAL;
163}
164
165static inline int
166max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev)
167{
168 return 0;
169}
170
171static inline void max1363_ring_cleanup(struct iio_dev *indio_dev)
172{
173}
174#endif /* CONFIG_MAX1363_RING_BUFFER */
175#endif /* _MAX1363_H_ */
diff --git a/drivers/staging/iio/adc/max1363_core.c b/drivers/staging/iio/adc/max1363_core.c
new file mode 100644
index 00000000000..72b0917412e
--- /dev/null
+++ b/drivers/staging/iio/adc/max1363_core.c
@@ -0,0 +1,1433 @@
1 /*
2 * iio/adc/max1363.c
3 * Copyright (C) 2008-2010 Jonathan Cameron
4 *
5 * based on linux/drivers/i2c/chips/max123x
6 * Copyright (C) 2002-2004 Stefan Eletzhofer
7 *
8 * based on linux/drivers/acron/char/pcf8583.c
9 * Copyright (C) 2000 Russell King
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * max1363.c
16 *
17 * Partial support for max1363 and similar chips.
18 *
19 * Not currently implemented.
20 *
21 * - Control of internal reference.
22 */
23
24#include <linux/interrupt.h>
25#include <linux/device.h>
26#include <linux/kernel.h>
27#include <linux/sysfs.h>
28#include <linux/list.h>
29#include <linux/i2c.h>
30#include <linux/regulator/consumer.h>
31#include <linux/slab.h>
32#include <linux/err.h>
33
34#include "../iio.h"
35#include "../sysfs.h"
36
37#include "../ring_generic.h"
38#include "adc.h"
39#include "max1363.h"
40
41#define MAX1363_MODE_SINGLE(_num, _mask) { \
42 .conf = MAX1363_CHANNEL_SEL(_num) \
43 | MAX1363_CONFIG_SCAN_SINGLE_1 \
44 | MAX1363_CONFIG_SE, \
45 .modemask = _mask, \
46 }
47
48#define MAX1363_MODE_SCAN_TO_CHANNEL(_num, _mask) { \
49 .conf = MAX1363_CHANNEL_SEL(_num) \
50 | MAX1363_CONFIG_SCAN_TO_CS \
51 | MAX1363_CONFIG_SE, \
52 .modemask = _mask, \
53 }
54
55/* note not available for max1363 hence naming */
56#define MAX1236_MODE_SCAN_MID_TO_CHANNEL(_mid, _num, _mask) { \
57 .conf = MAX1363_CHANNEL_SEL(_num) \
58 | MAX1236_SCAN_MID_TO_CHANNEL \
59 | MAX1363_CONFIG_SE, \
60 .modemask = _mask \
61}
62
63#define MAX1363_MODE_DIFF_SINGLE(_nump, _numm, _mask) { \
64 .conf = MAX1363_CHANNEL_SEL(_nump) \
65 | MAX1363_CONFIG_SCAN_SINGLE_1 \
66 | MAX1363_CONFIG_DE, \
67 .modemask = _mask \
68 }
69
70/* Can't think how to automate naming so specify for now */
71#define MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(_num, _numvals, _mask) { \
72 .conf = MAX1363_CHANNEL_SEL(_num) \
73 | MAX1363_CONFIG_SCAN_TO_CS \
74 | MAX1363_CONFIG_DE, \
75 .modemask = _mask \
76 }
77
78/* note only available for max1363 hence naming */
79#define MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(_num, _numvals, _mask) { \
80 .conf = MAX1363_CHANNEL_SEL(_num) \
81 | MAX1236_SCAN_MID_TO_CHANNEL \
82 | MAX1363_CONFIG_SE, \
83 .modemask = _mask \
84}
85
86static const struct max1363_mode max1363_mode_table[] = {
87 /* All of the single channel options first */
88 MAX1363_MODE_SINGLE(0, 1 << 0),
89 MAX1363_MODE_SINGLE(1, 1 << 1),
90 MAX1363_MODE_SINGLE(2, 1 << 2),
91 MAX1363_MODE_SINGLE(3, 1 << 3),
92 MAX1363_MODE_SINGLE(4, 1 << 4),
93 MAX1363_MODE_SINGLE(5, 1 << 5),
94 MAX1363_MODE_SINGLE(6, 1 << 6),
95 MAX1363_MODE_SINGLE(7, 1 << 7),
96 MAX1363_MODE_SINGLE(8, 1 << 8),
97 MAX1363_MODE_SINGLE(9, 1 << 9),
98 MAX1363_MODE_SINGLE(10, 1 << 10),
99 MAX1363_MODE_SINGLE(11, 1 << 11),
100
101 MAX1363_MODE_DIFF_SINGLE(0, 1, 1 << 12),
102 MAX1363_MODE_DIFF_SINGLE(2, 3, 1 << 13),
103 MAX1363_MODE_DIFF_SINGLE(4, 5, 1 << 14),
104 MAX1363_MODE_DIFF_SINGLE(6, 7, 1 << 15),
105 MAX1363_MODE_DIFF_SINGLE(8, 9, 1 << 16),
106 MAX1363_MODE_DIFF_SINGLE(10, 11, 1 << 17),
107 MAX1363_MODE_DIFF_SINGLE(1, 0, 1 << 18),
108 MAX1363_MODE_DIFF_SINGLE(3, 2, 1 << 19),
109 MAX1363_MODE_DIFF_SINGLE(5, 4, 1 << 20),
110 MAX1363_MODE_DIFF_SINGLE(7, 6, 1 << 21),
111 MAX1363_MODE_DIFF_SINGLE(9, 8, 1 << 22),
112 MAX1363_MODE_DIFF_SINGLE(11, 10, 1 << 23),
113
114 /* The multichannel scans next */
115 MAX1363_MODE_SCAN_TO_CHANNEL(1, 0x003),
116 MAX1363_MODE_SCAN_TO_CHANNEL(2, 0x007),
117 MAX1236_MODE_SCAN_MID_TO_CHANNEL(2, 3, 0x00C),
118 MAX1363_MODE_SCAN_TO_CHANNEL(3, 0x00F),
119 MAX1363_MODE_SCAN_TO_CHANNEL(4, 0x01F),
120 MAX1363_MODE_SCAN_TO_CHANNEL(5, 0x03F),
121 MAX1363_MODE_SCAN_TO_CHANNEL(6, 0x07F),
122 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 7, 0x0C0),
123 MAX1363_MODE_SCAN_TO_CHANNEL(7, 0x0FF),
124 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 8, 0x1C0),
125 MAX1363_MODE_SCAN_TO_CHANNEL(8, 0x1FF),
126 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 9, 0x3C0),
127 MAX1363_MODE_SCAN_TO_CHANNEL(9, 0x3FF),
128 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 10, 0x7C0),
129 MAX1363_MODE_SCAN_TO_CHANNEL(10, 0x7FF),
130 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 11, 0xFC0),
131 MAX1363_MODE_SCAN_TO_CHANNEL(11, 0xFFF),
132
133 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(2, 2, 0x003000),
134 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(4, 3, 0x007000),
135 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(6, 4, 0x00F000),
136 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(8, 2, 0x018000),
137 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(8, 5, 0x01F000),
138 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(10, 3, 0x038000),
139 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(10, 6, 0x3F000),
140 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(3, 2, 0x0C0000),
141 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(5, 3, 0x1C0000),
142 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(7, 4, 0x3C0000),
143 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(9, 2, 0x600000),
144 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(9, 5, 0x7C0000),
145 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(11, 3, 0xE00000),
146 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(11, 6, 0xFC0000),
147};
148
149const struct max1363_mode
150*max1363_match_mode(u32 mask, const struct max1363_chip_info *ci)
151{
152 int i;
153 if (mask)
154 for (i = 0; i < ci->num_modes; i++)
155 if (!((~max1363_mode_table[ci->mode_list[i]].modemask) &
156 mask))
157 return &max1363_mode_table[ci->mode_list[i]];
158 return NULL;
159}
160
161static int max1363_write_basic_config(struct i2c_client *client,
162 unsigned char d1,
163 unsigned char d2)
164{
165 u8 tx_buf[2] = {d1, d2};
166
167 return i2c_master_send(client, tx_buf, 2);
168}
169
170int max1363_set_scan_mode(struct max1363_state *st)
171{
172 st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK
173 | MAX1363_SCAN_MASK
174 | MAX1363_SE_DE_MASK);
175 st->configbyte |= st->current_mode->conf;
176
177 return max1363_write_basic_config(st->client,
178 st->setupbyte,
179 st->configbyte);
180}
181
182static int max1363_read_single_chan(struct iio_dev *indio_dev,
183 struct iio_chan_spec const *chan,
184 int *val,
185 long m)
186{
187 int ret = 0;
188 s32 data;
189 char rxbuf[2];
190 long mask;
191 struct max1363_state *st = iio_priv(indio_dev);
192 struct i2c_client *client = st->client;
193
194 mutex_lock(&indio_dev->mlock);
195 /*
196 * If monitor mode is enabled, the method for reading a single
197 * channel will have to be rather different and has not yet
198 * been implemented.
199 */
200 if (st->monitor_on) {
201 ret = -EBUSY;
202 goto error_ret;
203 }
204
205 /* If ring buffer capture is occurring, query the buffer */
206 if (iio_ring_enabled(indio_dev)) {
207 mask = max1363_mode_table[chan->address].modemask;
208 data = max1363_single_channel_from_ring(mask, st);
209 if (data < 0) {
210 ret = data;
211 goto error_ret;
212 }
213 } else {
214 /* Check to see if current scan mode is correct */
215 if (st->current_mode != &max1363_mode_table[chan->address]) {
216 /* Update scan mode if needed */
217 st->current_mode = &max1363_mode_table[chan->address];
218 ret = max1363_set_scan_mode(st);
219 if (ret < 0)
220 goto error_ret;
221 }
222 if (st->chip_info->bits != 8) {
223 /* Get reading */
224 data = i2c_master_recv(client, rxbuf, 2);
225 if (data < 0) {
226 ret = data;
227 goto error_ret;
228 }
229 data = (s32)(rxbuf[1]) | ((s32)(rxbuf[0] & 0x0F)) << 8;
230 } else {
231 /* Get reading */
232 data = i2c_master_recv(client, rxbuf, 1);
233 if (data < 0) {
234 ret = data;
235 goto error_ret;
236 }
237 data = rxbuf[0];
238 }
239 }
240 *val = data;
241error_ret:
242 mutex_unlock(&indio_dev->mlock);
243 return ret;
244
245}
246
247static int max1363_read_raw(struct iio_dev *indio_dev,
248 struct iio_chan_spec const *chan,
249 int *val,
250 int *val2,
251 long m)
252{
253 struct max1363_state *st = iio_priv(indio_dev);
254 int ret;
255 switch (m) {
256 case 0:
257 ret = max1363_read_single_chan(indio_dev, chan, val, m);
258 if (ret)
259 return ret;
260 return IIO_VAL_INT;
261 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
262 if ((1 << (st->chip_info->bits + 1)) >
263 st->chip_info->int_vref_mv) {
264 *val = 0;
265 *val2 = 500000;
266 return IIO_VAL_INT_PLUS_MICRO;
267 } else {
268 *val = (st->chip_info->int_vref_mv)
269 >> st->chip_info->bits;
270 return IIO_VAL_INT;
271 }
272 default:
273 return -EINVAL;
274 }
275 return 0;
276}
277
278/* Applies to max1363 */
279static const enum max1363_modes max1363_mode_list[] = {
280 _s0, _s1, _s2, _s3,
281 s0to1, s0to2, s0to3,
282 d0m1, d2m3, d1m0, d3m2,
283 d0m1to2m3, d1m0to3m2,
284};
285
286#define MAX1363_EV_M \
287 (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) \
288 | IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING))
289#define MAX1363_INFO_MASK (1 << IIO_CHAN_INFO_SCALE_SHARED)
290
291static struct iio_chan_spec max1363_channels[] = {
292 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, MAX1363_INFO_MASK,
293 _s0, 0, IIO_ST('u', 12, 16, 0), MAX1363_EV_M),
294 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0, MAX1363_INFO_MASK,
295 _s1, 1, IIO_ST('u', 12, 16, 0), MAX1363_EV_M),
296 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0, MAX1363_INFO_MASK,
297 _s2, 2, IIO_ST('u', 12, 16, 0), MAX1363_EV_M),
298 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0, MAX1363_INFO_MASK,
299 _s3, 3, IIO_ST('u', 12, 16, 0), MAX1363_EV_M),
300 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 0, 1, MAX1363_INFO_MASK,
301 d0m1, 4, IIO_ST('s', 12, 16, 0), MAX1363_EV_M),
302 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 2, 3, MAX1363_INFO_MASK,
303 d2m3, 5, IIO_ST('s', 12, 16, 0), MAX1363_EV_M),
304 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 1, 0, MAX1363_INFO_MASK,
305 d1m0, 6, IIO_ST('s', 12, 16, 0), MAX1363_EV_M),
306 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 3, 2, MAX1363_INFO_MASK,
307 d3m2, 7, IIO_ST('s', 12, 16, 0), MAX1363_EV_M),
308 IIO_CHAN_SOFT_TIMESTAMP(8)
309};
310
311static struct iio_chan_spec max1361_channels[] = {
312 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, MAX1363_INFO_MASK,
313 _s0, 0, IIO_ST('u', 10, 16, 0), MAX1363_EV_M),
314 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0, MAX1363_INFO_MASK,
315 _s1, 1, IIO_ST('u', 10, 16, 0), MAX1363_EV_M),
316 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0, MAX1363_INFO_MASK,
317 _s2, 2, IIO_ST('u', 10, 16, 0), MAX1363_EV_M),
318 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0, MAX1363_INFO_MASK,
319 _s3, 3, IIO_ST('u', 10, 16, 0), MAX1363_EV_M),
320 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 0, 1, MAX1363_INFO_MASK,
321 d0m1, 4, IIO_ST('s', 10, 16, 0), MAX1363_EV_M),
322 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 2, 3, MAX1363_INFO_MASK,
323 d2m3, 5, IIO_ST('s', 10, 16, 0), MAX1363_EV_M),
324 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 1, 0, MAX1363_INFO_MASK,
325 d1m0, 6, IIO_ST('s', 10, 16, 0), MAX1363_EV_M),
326 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 3, 2, MAX1363_INFO_MASK,
327 d3m2, 7, IIO_ST('s', 10, 16, 0), MAX1363_EV_M),
328 IIO_CHAN_SOFT_TIMESTAMP(8)
329};
330
331#define MAX1363_CHAN_U(num, address, scan_index, bits) \
332 IIO_CHAN(IIO_IN, 0, 1, 0, NULL, num, 0, MAX1363_INFO_MASK, \
333 address, scan_index, IIO_ST('u', bits, \
334 (bits == 8) ? 8 : 16, 0), 0)
335/* bipolar channel */
336#define MAX1363_CHAN_B(num, num2, address, scan_index, bits) \
337 IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, num, num2, MAX1363_INFO_MASK,\
338 address, scan_index, IIO_ST('s', bits, \
339 (bits == 8) ? 8 : 16, 0), 0)
340
341#define MAX1363_4X_CHANS(bits) { \
342 MAX1363_CHAN_U(0, _s0, 0, bits), \
343 MAX1363_CHAN_U(1, _s1, 1, bits), \
344 MAX1363_CHAN_U(2, _s2, 2, bits), \
345 MAX1363_CHAN_U(3, _s3, 3, bits), \
346 MAX1363_CHAN_B(0, 1, d0m1, 4, bits), \
347 MAX1363_CHAN_B(2, 3, d2m3, 5, bits), \
348 MAX1363_CHAN_B(1, 0, d1m0, 6, bits), \
349 MAX1363_CHAN_B(3, 2, d3m2, 7, bits), \
350 IIO_CHAN_SOFT_TIMESTAMP(8) \
351 }
352
353static struct iio_chan_spec max1036_channels[] = MAX1363_4X_CHANS(8);
354static struct iio_chan_spec max1136_channels[] = MAX1363_4X_CHANS(10);
355static struct iio_chan_spec max1236_channels[] = MAX1363_4X_CHANS(12);
356
357/* Appies to max1236, max1237 */
358static const enum max1363_modes max1236_mode_list[] = {
359 _s0, _s1, _s2, _s3,
360 s0to1, s0to2, s0to3,
361 d0m1, d2m3, d1m0, d3m2,
362 d0m1to2m3, d1m0to3m2,
363 s2to3,
364};
365
366/* Applies to max1238, max1239 */
367static const enum max1363_modes max1238_mode_list[] = {
368 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11,
369 s0to1, s0to2, s0to3, s0to4, s0to5, s0to6,
370 s0to7, s0to8, s0to9, s0to10, s0to11,
371 d0m1, d2m3, d4m5, d6m7, d8m9, d10m11,
372 d1m0, d3m2, d5m4, d7m6, d9m8, d11m10,
373 d0m1to2m3, d0m1to4m5, d0m1to6m7, d0m1to8m9, d0m1to10m11,
374 d1m0to3m2, d1m0to5m4, d1m0to7m6, d1m0to9m8, d1m0to11m10,
375 s6to7, s6to8, s6to9, s6to10, s6to11,
376 d6m7to8m9, d6m7to10m11, d7m6to9m8, d7m6to11m10,
377};
378
379#define MAX1363_12X_CHANS(bits) { \
380 MAX1363_CHAN_U(0, _s0, 0, bits), \
381 MAX1363_CHAN_U(1, _s1, 1, bits), \
382 MAX1363_CHAN_U(2, _s2, 2, bits), \
383 MAX1363_CHAN_U(3, _s3, 3, bits), \
384 MAX1363_CHAN_U(4, _s4, 4, bits), \
385 MAX1363_CHAN_U(5, _s5, 5, bits), \
386 MAX1363_CHAN_U(6, _s6, 6, bits), \
387 MAX1363_CHAN_U(7, _s7, 7, bits), \
388 MAX1363_CHAN_U(8, _s8, 8, bits), \
389 MAX1363_CHAN_U(9, _s9, 9, bits), \
390 MAX1363_CHAN_U(10, _s10, 10, bits), \
391 MAX1363_CHAN_U(11, _s11, 11, bits), \
392 MAX1363_CHAN_B(0, 1, d0m1, 12, bits), \
393 MAX1363_CHAN_B(2, 3, d2m3, 13, bits), \
394 MAX1363_CHAN_B(4, 5, d4m5, 14, bits), \
395 MAX1363_CHAN_B(6, 7, d6m7, 15, bits), \
396 MAX1363_CHAN_B(8, 9, d8m9, 16, bits), \
397 MAX1363_CHAN_B(10, 11, d10m11, 17, bits), \
398 MAX1363_CHAN_B(1, 0, d1m0, 18, bits), \
399 MAX1363_CHAN_B(3, 2, d3m2, 19, bits), \
400 MAX1363_CHAN_B(5, 4, d5m4, 20, bits), \
401 MAX1363_CHAN_B(7, 6, d7m6, 21, bits), \
402 MAX1363_CHAN_B(9, 8, d9m8, 22, bits), \
403 MAX1363_CHAN_B(11, 10, d11m10, 23, bits), \
404 IIO_CHAN_SOFT_TIMESTAMP(24) \
405 }
406static struct iio_chan_spec max1038_channels[] = MAX1363_12X_CHANS(8);
407static struct iio_chan_spec max1138_channels[] = MAX1363_12X_CHANS(10);
408static struct iio_chan_spec max1238_channels[] = MAX1363_12X_CHANS(12);
409
410static const enum max1363_modes max11607_mode_list[] = {
411 _s0, _s1, _s2, _s3,
412 s0to1, s0to2, s0to3,
413 s2to3,
414 d0m1, d2m3, d1m0, d3m2,
415 d0m1to2m3, d1m0to3m2,
416};
417
418static const enum max1363_modes max11608_mode_list[] = {
419 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7,
420 s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, s0to7,
421 s6to7,
422 d0m1, d2m3, d4m5, d6m7,
423 d1m0, d3m2, d5m4, d7m6,
424 d0m1to2m3, d0m1to4m5, d0m1to6m7,
425 d1m0to3m2, d1m0to5m4, d1m0to7m6,
426};
427
428#define MAX1363_8X_CHANS(bits) { \
429 MAX1363_CHAN_U(0, _s0, 0, bits), \
430 MAX1363_CHAN_U(1, _s1, 1, bits), \
431 MAX1363_CHAN_U(2, _s2, 2, bits), \
432 MAX1363_CHAN_U(3, _s3, 3, bits), \
433 MAX1363_CHAN_U(4, _s4, 4, bits), \
434 MAX1363_CHAN_U(5, _s5, 5, bits), \
435 MAX1363_CHAN_U(6, _s6, 6, bits), \
436 MAX1363_CHAN_U(7, _s7, 7, bits), \
437 MAX1363_CHAN_B(0, 1, d0m1, 8, bits), \
438 MAX1363_CHAN_B(2, 3, d2m3, 9, bits), \
439 MAX1363_CHAN_B(4, 5, d4m5, 10, bits), \
440 MAX1363_CHAN_B(6, 7, d6m7, 11, bits), \
441 MAX1363_CHAN_B(1, 0, d1m0, 12, bits), \
442 MAX1363_CHAN_B(3, 2, d3m2, 13, bits), \
443 MAX1363_CHAN_B(5, 4, d5m4, 14, bits), \
444 MAX1363_CHAN_B(7, 6, d7m6, 15, bits), \
445 IIO_CHAN_SOFT_TIMESTAMP(16) \
446 }
447static struct iio_chan_spec max11602_channels[] = MAX1363_8X_CHANS(8);
448static struct iio_chan_spec max11608_channels[] = MAX1363_8X_CHANS(10);
449static struct iio_chan_spec max11614_channels[] = MAX1363_8X_CHANS(12);
450
451static const enum max1363_modes max11644_mode_list[] = {
452 _s0, _s1, s0to1, d0m1, d1m0,
453};
454
455#define MAX1363_2X_CHANS(bits) { \
456 MAX1363_CHAN_U(0, _s0, 0, bits), \
457 MAX1363_CHAN_U(1, _s1, 1, bits), \
458 MAX1363_CHAN_B(0, 1, d0m1, 2, bits), \
459 MAX1363_CHAN_B(1, 0, d1m0, 3, bits), \
460 IIO_CHAN_SOFT_TIMESTAMP(4) \
461 }
462
463static struct iio_chan_spec max11646_channels[] = MAX1363_2X_CHANS(10);
464static struct iio_chan_spec max11644_channels[] = MAX1363_2X_CHANS(12);
465
466enum { max1361,
467 max1362,
468 max1363,
469 max1364,
470 max1036,
471 max1037,
472 max1038,
473 max1039,
474 max1136,
475 max1137,
476 max1138,
477 max1139,
478 max1236,
479 max1237,
480 max1238,
481 max1239,
482 max11600,
483 max11601,
484 max11602,
485 max11603,
486 max11604,
487 max11605,
488 max11606,
489 max11607,
490 max11608,
491 max11609,
492 max11610,
493 max11611,
494 max11612,
495 max11613,
496 max11614,
497 max11615,
498 max11616,
499 max11617,
500 max11644,
501 max11645,
502 max11646,
503 max11647
504};
505
506static const int max1363_monitor_speeds[] = { 133000, 665000, 33300, 16600,
507 8300, 4200, 2000, 1000 };
508
509static ssize_t max1363_monitor_show_freq(struct device *dev,
510 struct device_attribute *attr,
511 char *buf)
512{
513 struct max1363_state *st = iio_priv(dev_get_drvdata(dev));
514 return sprintf(buf, "%d\n", max1363_monitor_speeds[st->monitor_speed]);
515}
516
517static ssize_t max1363_monitor_store_freq(struct device *dev,
518 struct device_attribute *attr,
519 const char *buf,
520 size_t len)
521{
522 struct iio_dev *indio_dev = dev_get_drvdata(dev);
523 struct max1363_state *st = iio_priv(indio_dev);
524 int i, ret;
525 unsigned long val;
526 bool found = false;
527
528 ret = strict_strtoul(buf, 10, &val);
529 if (ret)
530 return -EINVAL;
531 for (i = 0; i < ARRAY_SIZE(max1363_monitor_speeds); i++)
532 if (val == max1363_monitor_speeds[i]) {
533 found = true;
534 break;
535 }
536 if (!found)
537 return -EINVAL;
538
539 mutex_lock(&indio_dev->mlock);
540 st->monitor_speed = i;
541 mutex_unlock(&indio_dev->mlock);
542
543 return 0;
544}
545
546static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR,
547 max1363_monitor_show_freq,
548 max1363_monitor_store_freq);
549
550static IIO_CONST_ATTR(sampling_frequency_available,
551 "133000 665000 33300 16600 8300 4200 2000 1000");
552
553static int max1363_read_thresh(struct iio_dev *indio_dev,
554 int event_code,
555 int *val)
556{
557 struct max1363_state *st = iio_priv(indio_dev);
558 if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING)
559 *val = st->thresh_low[IIO_EVENT_CODE_EXTRACT_NUM(event_code)];
560 else
561 *val = st->thresh_high[IIO_EVENT_CODE_EXTRACT_NUM(event_code)];
562 return 0;
563}
564
565static int max1363_write_thresh(struct iio_dev *indio_dev,
566 int event_code,
567 int val)
568{
569 struct max1363_state *st = iio_priv(indio_dev);
570 /* make it handle signed correctly as well */
571 switch (st->chip_info->bits) {
572 case 10:
573 if (val > 0x3FF)
574 return -EINVAL;
575 break;
576 case 12:
577 if (val > 0xFFF)
578 return -EINVAL;
579 break;
580 }
581
582 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
583 case IIO_EV_DIR_FALLING:
584 st->thresh_low[IIO_EVENT_CODE_EXTRACT_NUM(event_code)] = val;
585 break;
586 case IIO_EV_DIR_RISING:
587 st->thresh_high[IIO_EVENT_CODE_EXTRACT_NUM(event_code)] = val;
588 break;
589 }
590
591 return 0;
592}
593
594static const int max1363_event_codes[] = {
595 IIO_EVENT_CODE_IN_LOW_THRESH(3), IIO_EVENT_CODE_IN_HIGH_THRESH(3),
596 IIO_EVENT_CODE_IN_LOW_THRESH(2), IIO_EVENT_CODE_IN_HIGH_THRESH(2),
597 IIO_EVENT_CODE_IN_LOW_THRESH(1), IIO_EVENT_CODE_IN_HIGH_THRESH(1),
598 IIO_EVENT_CODE_IN_LOW_THRESH(0), IIO_EVENT_CODE_IN_HIGH_THRESH(0)
599};
600
601static irqreturn_t max1363_event_handler(int irq, void *private)
602{
603 struct iio_dev *indio_dev = private;
604 struct max1363_state *st = iio_priv(indio_dev);
605 s64 timestamp = iio_get_time_ns();
606 unsigned long mask, loc;
607 u8 rx;
608 u8 tx[2] = { st->setupbyte,
609 MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 };
610
611 i2c_master_recv(st->client, &rx, 1);
612 mask = rx;
613 for_each_set_bit(loc, &mask, 8)
614 iio_push_event(indio_dev, 0, max1363_event_codes[loc],
615 timestamp);
616 i2c_master_send(st->client, tx, 2);
617
618 return IRQ_HANDLED;
619}
620
621static int max1363_read_event_config(struct iio_dev *indio_dev,
622 int event_code)
623{
624 struct max1363_state *st = iio_priv(indio_dev);
625
626 int val;
627 int number = IIO_EVENT_CODE_EXTRACT_NUM(event_code);
628 mutex_lock(&indio_dev->mlock);
629 if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING)
630 val = (1 << number) & st->mask_low;
631 else
632 val = (1 << number) & st->mask_high;
633 mutex_unlock(&indio_dev->mlock);
634
635 return val;
636}
637
638static int max1363_monitor_mode_update(struct max1363_state *st, int enabled)
639{
640 u8 *tx_buf;
641 int ret, i = 3, j;
642 unsigned long numelements;
643 int len;
644 long modemask;
645
646 if (!enabled) {
647 /* transition to ring capture is not currently supported */
648 st->setupbyte &= ~MAX1363_SETUP_MONITOR_SETUP;
649 st->configbyte &= ~MAX1363_SCAN_MASK;
650 st->monitor_on = false;
651 return max1363_write_basic_config(st->client,
652 st->setupbyte,
653 st->configbyte);
654 }
655
656 /* Ensure we are in the relevant mode */
657 st->setupbyte |= MAX1363_SETUP_MONITOR_SETUP;
658 st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK
659 | MAX1363_SCAN_MASK
660 | MAX1363_SE_DE_MASK);
661 st->configbyte |= MAX1363_CONFIG_SCAN_MONITOR_MODE;
662 if ((st->mask_low | st->mask_high) & 0x0F) {
663 st->configbyte |= max1363_mode_table[s0to3].conf;
664 modemask = max1363_mode_table[s0to3].modemask;
665 } else if ((st->mask_low | st->mask_high) & 0x30) {
666 st->configbyte |= max1363_mode_table[d0m1to2m3].conf;
667 modemask = max1363_mode_table[d0m1to2m3].modemask;
668 } else {
669 st->configbyte |= max1363_mode_table[d1m0to3m2].conf;
670 modemask = max1363_mode_table[d1m0to3m2].modemask;
671 }
672 numelements = hweight_long(modemask);
673 len = 3 * numelements + 3;
674 tx_buf = kmalloc(len, GFP_KERNEL);
675 if (!tx_buf) {
676 ret = -ENOMEM;
677 goto error_ret;
678 }
679 tx_buf[0] = st->configbyte;
680 tx_buf[1] = st->setupbyte;
681 tx_buf[2] = (st->monitor_speed << 1);
682
683 /*
684 * So we need to do yet another bit of nefarious scan mode
685 * setup to match what we need.
686 */
687 for (j = 0; j < 8; j++)
688 if (modemask & (1 << j)) {
689 /* Establish the mode is in the scan */
690 if (st->mask_low & (1 << j)) {
691 tx_buf[i] = (st->thresh_low[j] >> 4) & 0xFF;
692 tx_buf[i + 1] = (st->thresh_low[j] << 4) & 0xF0;
693 } else if (j < 4) {
694 tx_buf[i] = 0;
695 tx_buf[i + 1] = 0;
696 } else {
697 tx_buf[i] = 0x80;
698 tx_buf[i + 1] = 0;
699 }
700 if (st->mask_high & (1 << j)) {
701 tx_buf[i + 1] |=
702 (st->thresh_high[j] >> 8) & 0x0F;
703 tx_buf[i + 2] = st->thresh_high[j] & 0xFF;
704 } else if (j < 4) {
705 tx_buf[i + 1] |= 0x0F;
706 tx_buf[i + 2] = 0xFF;
707 } else {
708 tx_buf[i + 1] |= 0x07;
709 tx_buf[i + 2] = 0xFF;
710 }
711 i += 3;
712 }
713
714
715 ret = i2c_master_send(st->client, tx_buf, len);
716 if (ret < 0)
717 goto error_ret;
718 if (ret != len) {
719 ret = -EIO;
720 goto error_ret;
721 }
722
723 /*
724 * Now that we hopefully have sensible thresholds in place it is
725 * time to turn the interrupts on.
726 * It is unclear from the data sheet if this should be necessary
727 * (i.e. whether monitor mode setup is atomic) but it appears to
728 * be in practice.
729 */
730 tx_buf[0] = st->setupbyte;
731 tx_buf[1] = MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0;
732 ret = i2c_master_send(st->client, tx_buf, 2);
733 if (ret < 0)
734 goto error_ret;
735 if (ret != 2) {
736 ret = -EIO;
737 goto error_ret;
738 }
739 ret = 0;
740 st->monitor_on = true;
741error_ret:
742
743 kfree(tx_buf);
744
745 return ret;
746}
747
748/*
749 * To keep this manageable we always use one of 3 scan modes.
750 * Scan 0...3, 0-1,2-3 and 1-0,3-2
751 */
752
753static inline int __max1363_check_event_mask(int thismask, int checkmask)
754{
755 int ret = 0;
756 /* Is it unipolar */
757 if (thismask < 4) {
758 if (checkmask & ~0x0F) {
759 ret = -EBUSY;
760 goto error_ret;
761 }
762 } else if (thismask < 6) {
763 if (checkmask & ~0x30) {
764 ret = -EBUSY;
765 goto error_ret;
766 }
767 } else if (checkmask & ~0xC0)
768 ret = -EBUSY;
769error_ret:
770 return ret;
771}
772
773static int max1363_write_event_config(struct iio_dev *indio_dev,
774 int event_code,
775 int state)
776{
777 int ret = 0;
778 struct max1363_state *st = iio_priv(indio_dev);
779 u16 unifiedmask;
780 int number = IIO_EVENT_CODE_EXTRACT_NUM(event_code);
781
782 mutex_lock(&indio_dev->mlock);
783 unifiedmask = st->mask_low | st->mask_high;
784 if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING) {
785
786 if (state == 0)
787 st->mask_low &= ~(1 << number);
788 else {
789 ret = __max1363_check_event_mask((1 << number),
790 unifiedmask);
791 if (ret)
792 goto error_ret;
793 st->mask_low |= (1 << number);
794 }
795 } else {
796 if (state == 0)
797 st->mask_high &= ~(1 << number);
798 else {
799 ret = __max1363_check_event_mask((1 << number),
800 unifiedmask);
801 if (ret)
802 goto error_ret;
803 st->mask_high |= (1 << number);
804 }
805 }
806
807 max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low));
808error_ret:
809 mutex_unlock(&indio_dev->mlock);
810
811 return ret;
812}
813
814/*
815 * As with scan_elements, only certain sets of these can
816 * be combined.
817 */
818static struct attribute *max1363_event_attributes[] = {
819 &iio_dev_attr_sampling_frequency.dev_attr.attr,
820 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
821 NULL,
822};
823
824static struct attribute_group max1363_event_attribute_group = {
825 .attrs = max1363_event_attributes,
826};
827
828#define MAX1363_EVENT_FUNCS \
829
830
831static const struct iio_info max1238_info = {
832 .read_raw = &max1363_read_raw,
833 .driver_module = THIS_MODULE,
834};
835
836static const struct iio_info max1363_info = {
837 .read_event_value = &max1363_read_thresh,
838 .write_event_value = &max1363_write_thresh,
839 .read_event_config = &max1363_read_event_config,
840 .write_event_config = &max1363_write_event_config,
841 .read_raw = &max1363_read_raw,
842 .driver_module = THIS_MODULE,
843 .num_interrupt_lines = 1,
844 .event_attrs = &max1363_event_attribute_group,
845};
846
847/* max1363 and max1368 tested - rest from data sheet */
848static const struct max1363_chip_info max1363_chip_info_tbl[] = {
849 [max1361] = {
850 .bits = 10,
851 .int_vref_mv = 2048,
852 .mode_list = max1363_mode_list,
853 .num_modes = ARRAY_SIZE(max1363_mode_list),
854 .default_mode = s0to3,
855 .channels = max1361_channels,
856 .num_channels = ARRAY_SIZE(max1361_channels),
857 .info = &max1363_info,
858 },
859 [max1362] = {
860 .bits = 10,
861 .int_vref_mv = 4096,
862 .mode_list = max1363_mode_list,
863 .num_modes = ARRAY_SIZE(max1363_mode_list),
864 .default_mode = s0to3,
865 .channels = max1361_channels,
866 .num_channels = ARRAY_SIZE(max1361_channels),
867 .info = &max1363_info,
868 },
869 [max1363] = {
870 .bits = 12,
871 .int_vref_mv = 2048,
872 .mode_list = max1363_mode_list,
873 .num_modes = ARRAY_SIZE(max1363_mode_list),
874 .default_mode = s0to3,
875 .channels = max1363_channels,
876 .num_channels = ARRAY_SIZE(max1363_channels),
877 .info = &max1363_info,
878 },
879 [max1364] = {
880 .bits = 12,
881 .int_vref_mv = 4096,
882 .mode_list = max1363_mode_list,
883 .num_modes = ARRAY_SIZE(max1363_mode_list),
884 .default_mode = s0to3,
885 .channels = max1363_channels,
886 .num_channels = ARRAY_SIZE(max1363_channels),
887 .info = &max1363_info,
888 },
889 [max1036] = {
890 .bits = 8,
891 .int_vref_mv = 4096,
892 .mode_list = max1236_mode_list,
893 .num_modes = ARRAY_SIZE(max1236_mode_list),
894 .default_mode = s0to3,
895 .info = &max1238_info,
896 .channels = max1036_channels,
897 .num_channels = ARRAY_SIZE(max1036_channels),
898 },
899 [max1037] = {
900 .bits = 8,
901 .int_vref_mv = 2048,
902 .mode_list = max1236_mode_list,
903 .num_modes = ARRAY_SIZE(max1236_mode_list),
904 .default_mode = s0to3,
905 .info = &max1238_info,
906 .channels = max1036_channels,
907 .num_channels = ARRAY_SIZE(max1036_channels),
908 },
909 [max1038] = {
910 .bits = 8,
911 .int_vref_mv = 4096,
912 .mode_list = max1238_mode_list,
913 .num_modes = ARRAY_SIZE(max1238_mode_list),
914 .default_mode = s0to11,
915 .info = &max1238_info,
916 .channels = max1038_channels,
917 .num_channels = ARRAY_SIZE(max1038_channels),
918 },
919 [max1039] = {
920 .bits = 8,
921 .int_vref_mv = 2048,
922 .mode_list = max1238_mode_list,
923 .num_modes = ARRAY_SIZE(max1238_mode_list),
924 .default_mode = s0to11,
925 .info = &max1238_info,
926 .channels = max1038_channels,
927 .num_channels = ARRAY_SIZE(max1038_channels),
928 },
929 [max1136] = {
930 .bits = 10,
931 .int_vref_mv = 4096,
932 .mode_list = max1236_mode_list,
933 .num_modes = ARRAY_SIZE(max1236_mode_list),
934 .default_mode = s0to3,
935 .info = &max1238_info,
936 .channels = max1136_channels,
937 .num_channels = ARRAY_SIZE(max1136_channels),
938 },
939 [max1137] = {
940 .bits = 10,
941 .int_vref_mv = 2048,
942 .mode_list = max1236_mode_list,
943 .num_modes = ARRAY_SIZE(max1236_mode_list),
944 .default_mode = s0to3,
945 .info = &max1238_info,
946 .channels = max1136_channels,
947 .num_channels = ARRAY_SIZE(max1136_channels),
948 },
949 [max1138] = {
950 .bits = 10,
951 .int_vref_mv = 4096,
952 .mode_list = max1238_mode_list,
953 .num_modes = ARRAY_SIZE(max1238_mode_list),
954 .default_mode = s0to11,
955 .info = &max1238_info,
956 .channels = max1138_channels,
957 .num_channels = ARRAY_SIZE(max1138_channels),
958 },
959 [max1139] = {
960 .bits = 10,
961 .int_vref_mv = 2048,
962 .mode_list = max1238_mode_list,
963 .num_modes = ARRAY_SIZE(max1238_mode_list),
964 .default_mode = s0to11,
965 .info = &max1238_info,
966 .channels = max1138_channels,
967 .num_channels = ARRAY_SIZE(max1138_channels),
968 },
969 [max1236] = {
970 .bits = 12,
971 .int_vref_mv = 4096,
972 .mode_list = max1236_mode_list,
973 .num_modes = ARRAY_SIZE(max1236_mode_list),
974 .default_mode = s0to3,
975 .info = &max1238_info,
976 .channels = max1236_channels,
977 .num_channels = ARRAY_SIZE(max1236_channels),
978 },
979 [max1237] = {
980 .bits = 12,
981 .int_vref_mv = 2048,
982 .mode_list = max1236_mode_list,
983 .num_modes = ARRAY_SIZE(max1236_mode_list),
984 .default_mode = s0to3,
985 .info = &max1238_info,
986 .channels = max1236_channels,
987 .num_channels = ARRAY_SIZE(max1236_channels),
988 },
989 [max1238] = {
990 .bits = 12,
991 .int_vref_mv = 4096,
992 .mode_list = max1238_mode_list,
993 .num_modes = ARRAY_SIZE(max1238_mode_list),
994 .default_mode = s0to11,
995 .info = &max1238_info,
996 .channels = max1238_channels,
997 .num_channels = ARRAY_SIZE(max1238_channels),
998 },
999 [max1239] = {
1000 .bits = 12,
1001 .int_vref_mv = 2048,
1002 .mode_list = max1238_mode_list,
1003 .num_modes = ARRAY_SIZE(max1238_mode_list),
1004 .default_mode = s0to11,
1005 .info = &max1238_info,
1006 .channels = max1238_channels,
1007 .num_channels = ARRAY_SIZE(max1238_channels),
1008 },
1009 [max11600] = {
1010 .bits = 8,
1011 .int_vref_mv = 4096,
1012 .mode_list = max11607_mode_list,
1013 .num_modes = ARRAY_SIZE(max11607_mode_list),
1014 .default_mode = s0to3,
1015 .info = &max1238_info,
1016 .channels = max1036_channels,
1017 .num_channels = ARRAY_SIZE(max1036_channels),
1018 },
1019 [max11601] = {
1020 .bits = 8,
1021 .int_vref_mv = 2048,
1022 .mode_list = max11607_mode_list,
1023 .num_modes = ARRAY_SIZE(max11607_mode_list),
1024 .default_mode = s0to3,
1025 .info = &max1238_info,
1026 .channels = max1036_channels,
1027 .num_channels = ARRAY_SIZE(max1036_channels),
1028 },
1029 [max11602] = {
1030 .bits = 8,
1031 .int_vref_mv = 4096,
1032 .mode_list = max11608_mode_list,
1033 .num_modes = ARRAY_SIZE(max11608_mode_list),
1034 .default_mode = s0to7,
1035 .info = &max1238_info,
1036 .channels = max11602_channels,
1037 .num_channels = ARRAY_SIZE(max11602_channels),
1038 },
1039 [max11603] = {
1040 .bits = 8,
1041 .int_vref_mv = 2048,
1042 .mode_list = max11608_mode_list,
1043 .num_modes = ARRAY_SIZE(max11608_mode_list),
1044 .default_mode = s0to7,
1045 .info = &max1238_info,
1046 .channels = max11602_channels,
1047 .num_channels = ARRAY_SIZE(max11602_channels),
1048 },
1049 [max11604] = {
1050 .bits = 8,
1051 .int_vref_mv = 4098,
1052 .mode_list = max1238_mode_list,
1053 .num_modes = ARRAY_SIZE(max1238_mode_list),
1054 .default_mode = s0to11,
1055 .info = &max1238_info,
1056 .channels = max1238_channels,
1057 .num_channels = ARRAY_SIZE(max1238_channels),
1058 },
1059 [max11605] = {
1060 .bits = 8,
1061 .int_vref_mv = 2048,
1062 .mode_list = max1238_mode_list,
1063 .num_modes = ARRAY_SIZE(max1238_mode_list),
1064 .default_mode = s0to11,
1065 .info = &max1238_info,
1066 .channels = max1238_channels,
1067 .num_channels = ARRAY_SIZE(max1238_channels),
1068 },
1069 [max11606] = {
1070 .bits = 10,
1071 .int_vref_mv = 4096,
1072 .mode_list = max11607_mode_list,
1073 .num_modes = ARRAY_SIZE(max11607_mode_list),
1074 .default_mode = s0to3,
1075 .info = &max1238_info,
1076 .channels = max1136_channels,
1077 .num_channels = ARRAY_SIZE(max1136_channels),
1078 },
1079 [max11607] = {
1080 .bits = 10,
1081 .int_vref_mv = 2048,
1082 .mode_list = max11607_mode_list,
1083 .num_modes = ARRAY_SIZE(max11607_mode_list),
1084 .default_mode = s0to3,
1085 .info = &max1238_info,
1086 .channels = max1136_channels,
1087 .num_channels = ARRAY_SIZE(max1136_channels),
1088 },
1089 [max11608] = {
1090 .bits = 10,
1091 .int_vref_mv = 4096,
1092 .mode_list = max11608_mode_list,
1093 .num_modes = ARRAY_SIZE(max11608_mode_list),
1094 .default_mode = s0to7,
1095 .info = &max1238_info,
1096 .channels = max11608_channels,
1097 .num_channels = ARRAY_SIZE(max11608_channels),
1098 },
1099 [max11609] = {
1100 .bits = 10,
1101 .int_vref_mv = 2048,
1102 .mode_list = max11608_mode_list,
1103 .num_modes = ARRAY_SIZE(max11608_mode_list),
1104 .default_mode = s0to7,
1105 .info = &max1238_info,
1106 .channels = max11608_channels,
1107 .num_channels = ARRAY_SIZE(max11608_channels),
1108 },
1109 [max11610] = {
1110 .bits = 10,
1111 .int_vref_mv = 4098,
1112 .mode_list = max1238_mode_list,
1113 .num_modes = ARRAY_SIZE(max1238_mode_list),
1114 .default_mode = s0to11,
1115 .info = &max1238_info,
1116 .channels = max1238_channels,
1117 .num_channels = ARRAY_SIZE(max1238_channels),
1118 },
1119 [max11611] = {
1120 .bits = 10,
1121 .int_vref_mv = 2048,
1122 .mode_list = max1238_mode_list,
1123 .num_modes = ARRAY_SIZE(max1238_mode_list),
1124 .default_mode = s0to11,
1125 .info = &max1238_info,
1126 .channels = max1238_channels,
1127 .num_channels = ARRAY_SIZE(max1238_channels),
1128 },
1129 [max11612] = {
1130 .bits = 12,
1131 .int_vref_mv = 4096,
1132 .mode_list = max11607_mode_list,
1133 .num_modes = ARRAY_SIZE(max11607_mode_list),
1134 .default_mode = s0to3,
1135 .info = &max1238_info,
1136 .channels = max1363_channels,
1137 .num_channels = ARRAY_SIZE(max1363_channels),
1138 },
1139 [max11613] = {
1140 .bits = 12,
1141 .int_vref_mv = 2048,
1142 .mode_list = max11607_mode_list,
1143 .num_modes = ARRAY_SIZE(max11607_mode_list),
1144 .default_mode = s0to3,
1145 .info = &max1238_info,
1146 .channels = max1363_channels,
1147 .num_channels = ARRAY_SIZE(max1363_channels),
1148 },
1149 [max11614] = {
1150 .bits = 12,
1151 .int_vref_mv = 4096,
1152 .mode_list = max11608_mode_list,
1153 .num_modes = ARRAY_SIZE(max11608_mode_list),
1154 .default_mode = s0to7,
1155 .info = &max1238_info,
1156 .channels = max11614_channels,
1157 .num_channels = ARRAY_SIZE(max11614_channels),
1158 },
1159 [max11615] = {
1160 .bits = 12,
1161 .int_vref_mv = 2048,
1162 .mode_list = max11608_mode_list,
1163 .num_modes = ARRAY_SIZE(max11608_mode_list),
1164 .default_mode = s0to7,
1165 .info = &max1238_info,
1166 .channels = max11614_channels,
1167 .num_channels = ARRAY_SIZE(max11614_channels),
1168 },
1169 [max11616] = {
1170 .bits = 12,
1171 .int_vref_mv = 4098,
1172 .mode_list = max1238_mode_list,
1173 .num_modes = ARRAY_SIZE(max1238_mode_list),
1174 .default_mode = s0to11,
1175 .info = &max1238_info,
1176 .channels = max1238_channels,
1177 .num_channels = ARRAY_SIZE(max1238_channels),
1178 },
1179 [max11617] = {
1180 .bits = 12,
1181 .int_vref_mv = 2048,
1182 .mode_list = max1238_mode_list,
1183 .num_modes = ARRAY_SIZE(max1238_mode_list),
1184 .default_mode = s0to11,
1185 .info = &max1238_info,
1186 .channels = max1238_channels,
1187 .num_channels = ARRAY_SIZE(max1238_channels),
1188 },
1189 [max11644] = {
1190 .bits = 12,
1191 .int_vref_mv = 2048,
1192 .mode_list = max11644_mode_list,
1193 .num_modes = ARRAY_SIZE(max11644_mode_list),
1194 .default_mode = s0to1,
1195 .info = &max1238_info,
1196 .channels = max11644_channels,
1197 .num_channels = ARRAY_SIZE(max11644_channels),
1198 },
1199 [max11645] = {
1200 .bits = 12,
1201 .int_vref_mv = 4096,
1202 .mode_list = max11644_mode_list,
1203 .num_modes = ARRAY_SIZE(max11644_mode_list),
1204 .default_mode = s0to1,
1205 .info = &max1238_info,
1206 .channels = max11644_channels,
1207 .num_channels = ARRAY_SIZE(max11644_channels),
1208 },
1209 [max11646] = {
1210 .bits = 10,
1211 .int_vref_mv = 2048,
1212 .mode_list = max11644_mode_list,
1213 .num_modes = ARRAY_SIZE(max11644_mode_list),
1214 .default_mode = s0to1,
1215 .info = &max1238_info,
1216 .channels = max11646_channels,
1217 .num_channels = ARRAY_SIZE(max11646_channels),
1218 },
1219 [max11647] = {
1220 .bits = 10,
1221 .int_vref_mv = 4096,
1222 .mode_list = max11644_mode_list,
1223 .num_modes = ARRAY_SIZE(max11644_mode_list),
1224 .default_mode = s0to1,
1225 .info = &max1238_info,
1226 .channels = max11646_channels,
1227 .num_channels = ARRAY_SIZE(max11646_channels),
1228 },
1229};
1230
1231
1232
1233static int max1363_initial_setup(struct max1363_state *st)
1234{
1235 st->setupbyte = MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD
1236 | MAX1363_SETUP_POWER_UP_INT_REF
1237 | MAX1363_SETUP_INT_CLOCK
1238 | MAX1363_SETUP_UNIPOLAR
1239 | MAX1363_SETUP_NORESET;
1240
1241 /* Set scan mode writes the config anyway so wait until then*/
1242 st->setupbyte = MAX1363_SETUP_BYTE(st->setupbyte);
1243 st->current_mode = &max1363_mode_table[st->chip_info->default_mode];
1244 st->configbyte = MAX1363_CONFIG_BYTE(st->configbyte);
1245
1246 return max1363_set_scan_mode(st);
1247}
1248
1249static int __devinit max1363_probe(struct i2c_client *client,
1250 const struct i2c_device_id *id)
1251{
1252 int ret, i, regdone = 0;
1253 struct max1363_state *st;
1254 struct iio_dev *indio_dev;
1255 struct regulator *reg;
1256
1257 reg = regulator_get(&client->dev, "vcc");
1258 if (IS_ERR(reg)) {
1259 ret = PTR_ERR(reg);
1260 goto error_out;
1261 }
1262
1263 ret = regulator_enable(reg);
1264 if (ret)
1265 goto error_put_reg;
1266
1267 indio_dev = iio_allocate_device(sizeof(struct max1363_state));
1268 if (indio_dev == NULL) {
1269 ret = -ENOMEM;
1270 goto error_disable_reg;
1271 }
1272 st = iio_priv(indio_dev);
1273 st->reg = reg;
1274 /* this is only used for device removal purposes */
1275 i2c_set_clientdata(client, indio_dev);
1276
1277 st->chip_info = &max1363_chip_info_tbl[id->driver_data];
1278 st->client = client;
1279
1280 indio_dev->available_scan_masks
1281 = kzalloc(sizeof(*indio_dev->available_scan_masks)*
1282 (st->chip_info->num_modes + 1), GFP_KERNEL);
1283 if (!indio_dev->available_scan_masks) {
1284 ret = -ENOMEM;
1285 goto error_free_device;
1286 }
1287
1288 for (i = 0; i < st->chip_info->num_modes; i++)
1289 indio_dev->available_scan_masks[i] =
1290 max1363_mode_table[st->chip_info->mode_list[i]]
1291 .modemask;
1292 /* Estabilish that the iio_dev is a child of the i2c device */
1293 indio_dev->dev.parent = &client->dev;
1294 indio_dev->name = id->name;
1295
1296 indio_dev->info = st->chip_info->info;
1297 indio_dev->modes = INDIO_DIRECT_MODE;
1298 ret = max1363_initial_setup(st);
1299 if (ret < 0)
1300 goto error_free_available_scan_masks;
1301
1302 ret = max1363_register_ring_funcs_and_init(indio_dev);
1303 if (ret)
1304 goto error_free_available_scan_masks;
1305
1306 ret = iio_device_register(indio_dev);
1307 if (ret)
1308 goto error_cleanup_ring;
1309 regdone = 1;
1310 ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
1311 st->chip_info->channels,
1312 st->chip_info->num_channels);
1313 if (ret)
1314 goto error_cleanup_ring;
1315
1316 if (client->irq) {
1317 ret = request_threaded_irq(st->client->irq,
1318 NULL,
1319 &max1363_event_handler,
1320 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
1321 "max1363_event",
1322 indio_dev);
1323
1324 if (ret)
1325 goto error_uninit_ring;
1326 }
1327
1328 return 0;
1329
1330error_uninit_ring:
1331 iio_ring_buffer_unregister(indio_dev->ring);
1332error_cleanup_ring:
1333 max1363_ring_cleanup(indio_dev);
1334error_free_available_scan_masks:
1335 kfree(indio_dev->available_scan_masks);
1336error_free_device:
1337 if (!regdone)
1338 iio_free_device(indio_dev);
1339 else
1340 iio_device_unregister(indio_dev);
1341error_disable_reg:
1342 regulator_disable(reg);
1343error_put_reg:
1344 regulator_put(reg);
1345error_out:
1346 return ret;
1347}
1348
1349static int max1363_remove(struct i2c_client *client)
1350{
1351 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1352 struct max1363_state *st = iio_priv(indio_dev);
1353 struct regulator *reg = st->reg;
1354
1355 if (client->irq)
1356 free_irq(st->client->irq, indio_dev);
1357 iio_ring_buffer_unregister(indio_dev->ring);
1358 max1363_ring_cleanup(indio_dev);
1359 kfree(indio_dev->available_scan_masks);
1360 if (!IS_ERR(reg)) {
1361 regulator_disable(reg);
1362 regulator_put(reg);
1363 }
1364 iio_device_unregister(indio_dev);
1365
1366 return 0;
1367}
1368
1369static const struct i2c_device_id max1363_id[] = {
1370 { "max1361", max1361 },
1371 { "max1362", max1362 },
1372 { "max1363", max1363 },
1373 { "max1364", max1364 },
1374 { "max1036", max1036 },
1375 { "max1037", max1037 },
1376 { "max1038", max1038 },
1377 { "max1039", max1039 },
1378 { "max1136", max1136 },
1379 { "max1137", max1137 },
1380 { "max1138", max1138 },
1381 { "max1139", max1139 },
1382 { "max1236", max1236 },
1383 { "max1237", max1237 },
1384 { "max1238", max1238 },
1385 { "max1239", max1239 },
1386 { "max11600", max11600 },
1387 { "max11601", max11601 },
1388 { "max11602", max11602 },
1389 { "max11603", max11603 },
1390 { "max11604", max11604 },
1391 { "max11605", max11605 },
1392 { "max11606", max11606 },
1393 { "max11607", max11607 },
1394 { "max11608", max11608 },
1395 { "max11609", max11609 },
1396 { "max11610", max11610 },
1397 { "max11611", max11611 },
1398 { "max11612", max11612 },
1399 { "max11613", max11613 },
1400 { "max11614", max11614 },
1401 { "max11615", max11615 },
1402 { "max11616", max11616 },
1403 { "max11617", max11617 },
1404 {}
1405};
1406
1407MODULE_DEVICE_TABLE(i2c, max1363_id);
1408
1409static struct i2c_driver max1363_driver = {
1410 .driver = {
1411 .name = "max1363",
1412 },
1413 .probe = max1363_probe,
1414 .remove = max1363_remove,
1415 .id_table = max1363_id,
1416};
1417
1418static __init int max1363_init(void)
1419{
1420 return i2c_add_driver(&max1363_driver);
1421}
1422
1423static __exit void max1363_exit(void)
1424{
1425 i2c_del_driver(&max1363_driver);
1426}
1427
1428MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>");
1429MODULE_DESCRIPTION("Maxim 1363 ADC");
1430MODULE_LICENSE("GPL v2");
1431
1432module_init(max1363_init);
1433module_exit(max1363_exit);
diff --git a/drivers/staging/iio/adc/max1363_ring.c b/drivers/staging/iio/adc/max1363_ring.c
new file mode 100644
index 00000000000..f43befd1f77
--- /dev/null
+++ b/drivers/staging/iio/adc/max1363_ring.c
@@ -0,0 +1,209 @@
1/*
2 * Copyright (C) 2008 Jonathan Cameron
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * max1363_ring.c
9 */
10
11#include <linux/interrupt.h>
12#include <linux/device.h>
13#include <linux/slab.h>
14#include <linux/kernel.h>
15#include <linux/sysfs.h>
16#include <linux/list.h>
17#include <linux/i2c.h>
18#include <linux/bitops.h>
19
20#include "../iio.h"
21#include "../ring_generic.h"
22#include "../ring_sw.h"
23#include "../trigger.h"
24#include "../sysfs.h"
25
26#include "max1363.h"
27
28int max1363_single_channel_from_ring(long mask, struct max1363_state *st)
29{
30 struct iio_ring_buffer *ring = iio_priv_to_dev(st)->ring;
31 int count = 0, ret;
32 u8 *ring_data;
33 if (!(st->current_mode->modemask & mask)) {
34 ret = -EBUSY;
35 goto error_ret;
36 }
37
38 ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
39 GFP_KERNEL);
40 if (ring_data == NULL) {
41 ret = -ENOMEM;
42 goto error_ret;
43 }
44 ret = ring->access->read_last(ring, ring_data);
45 if (ret)
46 goto error_free_ring_data;
47 /* Need a count of channels prior to this one */
48 mask >>= 1;
49 while (mask) {
50 if (mask & st->current_mode->modemask)
51 count++;
52 mask >>= 1;
53 }
54 if (st->chip_info->bits != 8)
55 ret = ((int)(ring_data[count*2 + 0] & 0x0F) << 8)
56 + (int)(ring_data[count*2 + 1]);
57 else
58 ret = ring_data[count];
59
60error_free_ring_data:
61 kfree(ring_data);
62error_ret:
63 return ret;
64}
65
66
67/**
68 * max1363_ring_preenable() - setup the parameters of the ring before enabling
69 *
70 * The complex nature of the setting of the nuber of bytes per datum is due
71 * to this driver currently ensuring that the timestamp is stored at an 8
72 * byte boundary.
73 **/
74static int max1363_ring_preenable(struct iio_dev *indio_dev)
75{
76 struct max1363_state *st = iio_priv(indio_dev);
77 struct iio_ring_buffer *ring = indio_dev->ring;
78 size_t d_size = 0;
79 unsigned long numvals;
80
81 /*
82 * Need to figure out the current mode based upon the requested
83 * scan mask in iio_dev
84 */
85 st->current_mode = max1363_match_mode(ring->scan_mask,
86 st->chip_info);
87 if (!st->current_mode)
88 return -EINVAL;
89
90 max1363_set_scan_mode(st);
91
92 numvals = hweight_long(st->current_mode->modemask);
93 if (ring->access->set_bytes_per_datum) {
94 if (ring->scan_timestamp)
95 d_size += sizeof(s64);
96 if (st->chip_info->bits != 8)
97 d_size += numvals*2;
98 else
99 d_size += numvals;
100 if (ring->scan_timestamp && (d_size % 8))
101 d_size += 8 - (d_size % 8);
102 ring->access->set_bytes_per_datum(ring, d_size);
103 }
104
105 return 0;
106}
107
108static irqreturn_t max1363_trigger_handler(int irq, void *p)
109{
110 struct iio_poll_func *pf = p;
111 struct iio_dev *indio_dev = pf->private_data;
112 struct max1363_state *st = iio_priv(indio_dev);
113 s64 time_ns;
114 __u8 *rxbuf;
115 int b_sent;
116 size_t d_size;
117 unsigned long numvals = hweight_long(st->current_mode->modemask);
118
119 /* Ensure the timestamp is 8 byte aligned */
120 if (st->chip_info->bits != 8)
121 d_size = numvals*2 + sizeof(s64);
122 else
123 d_size = numvals + sizeof(s64);
124 if (d_size % sizeof(s64))
125 d_size += sizeof(s64) - (d_size % sizeof(s64));
126
127 /* Monitor mode prevents reading. Whilst not currently implemented
128 * might as well have this test in here in the meantime as it does
129 * no harm.
130 */
131 if (numvals == 0)
132 return IRQ_HANDLED;
133
134 rxbuf = kmalloc(d_size, GFP_KERNEL);
135 if (rxbuf == NULL)
136 return -ENOMEM;
137 if (st->chip_info->bits != 8)
138 b_sent = i2c_master_recv(st->client, rxbuf, numvals*2);
139 else
140 b_sent = i2c_master_recv(st->client, rxbuf, numvals);
141 if (b_sent < 0)
142 goto done;
143
144 time_ns = iio_get_time_ns();
145
146 memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns));
147
148 indio_dev->ring->access->store_to(indio_dev->ring, rxbuf, time_ns);
149done:
150 iio_trigger_notify_done(indio_dev->trig);
151 kfree(rxbuf);
152
153 return IRQ_HANDLED;
154}
155
156static const struct iio_ring_setup_ops max1363_ring_setup_ops = {
157 .postenable = &iio_triggered_ring_postenable,
158 .preenable = &max1363_ring_preenable,
159 .predisable = &iio_triggered_ring_predisable,
160};
161
162int max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev)
163{
164 struct max1363_state *st = iio_priv(indio_dev);
165 int ret = 0;
166
167 indio_dev->ring = iio_sw_rb_allocate(indio_dev);
168 if (!indio_dev->ring) {
169 ret = -ENOMEM;
170 goto error_ret;
171 }
172 indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
173 &max1363_trigger_handler,
174 IRQF_ONESHOT,
175 indio_dev,
176 "%s_consumer%d",
177 st->client->name,
178 indio_dev->id);
179 if (indio_dev->pollfunc == NULL) {
180 ret = -ENOMEM;
181 goto error_deallocate_sw_rb;
182 }
183 /* Effectively select the ring buffer implementation */
184 indio_dev->ring->access = &ring_sw_access_funcs;
185 /* Ring buffer functions - here trigger setup related */
186 indio_dev->ring->setup_ops = &max1363_ring_setup_ops;
187
188 /* Flag that polled ring buffering is possible */
189 indio_dev->modes |= INDIO_RING_TRIGGERED;
190
191 return 0;
192
193error_deallocate_sw_rb:
194 iio_sw_rb_free(indio_dev->ring);
195error_ret:
196 return ret;
197}
198
199void max1363_ring_cleanup(struct iio_dev *indio_dev)
200{
201 /* ensure that the trigger has been detached */
202 if (indio_dev->trig) {
203 iio_put_trigger(indio_dev->trig);
204 iio_trigger_dettach_poll_func(indio_dev->trig,
205 indio_dev->pollfunc);
206 }
207 iio_dealloc_pollfunc(indio_dev->pollfunc);
208 iio_sw_rb_free(indio_dev->ring);
209}
diff --git a/drivers/staging/iio/chrdev.h b/drivers/staging/iio/chrdev.h
new file mode 100644
index 00000000000..3e31ee6220e
--- /dev/null
+++ b/drivers/staging/iio/chrdev.h
@@ -0,0 +1,75 @@
1/* The industrial I/O core - character device related
2 *
3 * Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 */
9
10#ifndef _IIO_CHRDEV_H_
11#define _IIO_CHRDEV_H_
12struct iio_dev;
13
14/**
15 * struct iio_handler - Structure used to specify file operations
16 * for a particular chrdev
17 * @chrdev: character device structure
18 * @id: the location in the handler table - used for deallocation.
19 * @flags: file operations related flags including busy flag.
20 * @private: handler specific data used by the fileops registered with
21 * the chrdev.
22 */
23struct iio_handler {
24 struct cdev chrdev;
25 int id;
26 unsigned long flags;
27 void *private;
28};
29
30#define iio_cdev_to_handler(cd) \
31 container_of(cd, struct iio_handler, chrdev)
32
33/**
34 * struct iio_event_data - The actual event being pushed to userspace
35 * @id: event identifier
36 * @timestamp: best estimate of time of event occurrence (often from
37 * the interrupt handler)
38 */
39struct iio_event_data {
40 int id;
41 s64 timestamp;
42};
43
44/**
45 * struct iio_detected_event_list - list element for events that have occurred
46 * @list: linked list header
47 * @ev: the event itself
48 */
49struct iio_detected_event_list {
50 struct list_head list;
51 struct iio_event_data ev;
52};
53
54/**
55 * struct iio_event_interface - chrdev interface for an event line
56 * @dev: device assocated with event interface
57 * @handler: fileoperations and related control for the chrdev
58 * @wait: wait queue to allow blocking reads of events
59 * @event_list_lock: mutex to protect the list of detected events
60 * @det_events: list of detected events
61 * @max_events: maximum number of events before new ones are dropped
62 * @current_events: number of events in detected list
63 */
64struct iio_event_interface {
65 struct device dev;
66 struct iio_handler handler;
67 wait_queue_head_t wait;
68 struct mutex event_list_lock;
69 struct list_head det_events;
70 int max_events;
71 int current_events;
72 struct list_head dev_attr_list;
73};
74
75#endif
diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig
new file mode 100644
index 00000000000..7ddae357f20
--- /dev/null
+++ b/drivers/staging/iio/dac/Kconfig
@@ -0,0 +1,64 @@
1#
2# DAC drivers
3#
4comment "Digital to analog convertors"
5
6config AD5624R_SPI
7 tristate "Analog Devices AD5624/44/64R DAC spi driver"
8 depends on SPI
9 help
10 Say yes here to build support for Analog Devices AD5624R, AD5644R and
11 AD5664R convertors (DAC). This driver uses the common SPI interface.
12
13config AD5446
14 tristate "Analog Devices AD5444/6, AD5620/40/60 and AD5542A/12A DAC SPI driver"
15 depends on SPI
16 help
17 Say yes here to build support for Analog Devices AD5444, AD5446,
18 AD5512A, AD5542A, AD5543, AD5553, AD5601, AD5611, AD5620, AD5621,
19 AD5640, AD5660 DACs.
20
21 To compile this driver as a module, choose M here: the
22 module will be called ad5446.
23
24config AD5504
25 tristate "Analog Devices AD5504/AD5501 DAC SPI driver"
26 depends on SPI
27 help
28 Say yes here to build support for Analog Devices AD5504, AD5501,
29 High Voltage Digital to Analog Converter.
30
31 To compile this driver as a module, choose M here: the
32 module will be called ad5504.
33
34config AD5791
35 tristate "Analog Devices AD5760/AD5780/AD5781/AD5791 DAC SPI driver"
36 depends on SPI
37 help
38 Say yes here to build support for Analog Devices AD5760, AD5780,
39 AD5781, AD5791 High Resolution Voltage Output Digital to
40 Analog Converter.
41
42 To compile this driver as a module, choose M here: the
43 module will be called ad5791.
44
45config AD5686
46 tristate "Analog Devices AD5686R/AD5685R/AD5684R DAC SPI driver"
47 depends on SPI
48 help
49 Say yes here to build support for Analog Devices AD5686R, AD5685R,
50 AD5684R, AD5791 Voltage Output Digital to
51 Analog Converter.
52
53 To compile this driver as a module, choose M here: the
54 module will be called ad5686.
55
56config MAX517
57 tristate "Maxim MAX517/518/519 DAC driver"
58 depends on I2C && EXPERIMENTAL
59 help
60 If you say yes here you get support for the Maxim chips MAX517,
61 MAX518 and MAX519 (I2C 8-Bit DACs with rail-to-rail outputs).
62
63 This driver can also be built as a module. If so, the module
64 will be called max517.
diff --git a/drivers/staging/iio/dac/Makefile b/drivers/staging/iio/dac/Makefile
new file mode 100644
index 00000000000..7f4f2ed031e
--- /dev/null
+++ b/drivers/staging/iio/dac/Makefile
@@ -0,0 +1,10 @@
1#
2# Makefile for industrial I/O DAC drivers
3#
4
5obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
6obj-$(CONFIG_AD5504) += ad5504.o
7obj-$(CONFIG_AD5446) += ad5446.o
8obj-$(CONFIG_AD5791) += ad5791.o
9obj-$(CONFIG_AD5686) += ad5686.o
10obj-$(CONFIG_MAX517) += max517.o
diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c
new file mode 100644
index 00000000000..e8a9d0bf1ed
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5446.c
@@ -0,0 +1,480 @@
1/*
2 * AD5446 SPI DAC driver
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/workqueue.h>
11#include <linux/device.h>
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/sysfs.h>
15#include <linux/list.h>
16#include <linux/spi/spi.h>
17#include <linux/regulator/consumer.h>
18#include <linux/err.h>
19
20#include "../iio.h"
21#include "../sysfs.h"
22#include "dac.h"
23
24#include "ad5446.h"
25
26static void ad5446_store_sample(struct ad5446_state *st, unsigned val)
27{
28 st->data.d16 = cpu_to_be16(AD5446_LOAD |
29 (val << st->chip_info->left_shift));
30}
31
32static void ad5542_store_sample(struct ad5446_state *st, unsigned val)
33{
34 st->data.d16 = cpu_to_be16(val << st->chip_info->left_shift);
35}
36
37static void ad5620_store_sample(struct ad5446_state *st, unsigned val)
38{
39 st->data.d16 = cpu_to_be16(AD5620_LOAD |
40 (val << st->chip_info->left_shift));
41}
42
43static void ad5660_store_sample(struct ad5446_state *st, unsigned val)
44{
45 val |= AD5660_LOAD;
46 st->data.d24[0] = (val >> 16) & 0xFF;
47 st->data.d24[1] = (val >> 8) & 0xFF;
48 st->data.d24[2] = val & 0xFF;
49}
50
51static void ad5620_store_pwr_down(struct ad5446_state *st, unsigned mode)
52{
53 st->data.d16 = cpu_to_be16(mode << 14);
54}
55
56static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode)
57{
58 unsigned val = mode << 16;
59
60 st->data.d24[0] = (val >> 16) & 0xFF;
61 st->data.d24[1] = (val >> 8) & 0xFF;
62 st->data.d24[2] = val & 0xFF;
63}
64
65static ssize_t ad5446_write(struct device *dev,
66 struct device_attribute *attr,
67 const char *buf,
68 size_t len)
69{
70 struct iio_dev *dev_info = dev_get_drvdata(dev);
71 struct ad5446_state *st = iio_priv(dev_info);
72 int ret;
73 long val;
74
75 ret = strict_strtol(buf, 10, &val);
76 if (ret)
77 goto error_ret;
78
79 if (val > RES_MASK(st->chip_info->bits)) {
80 ret = -EINVAL;
81 goto error_ret;
82 }
83
84 mutex_lock(&dev_info->mlock);
85 st->cached_val = val;
86 st->chip_info->store_sample(st, val);
87 ret = spi_sync(st->spi, &st->msg);
88 mutex_unlock(&dev_info->mlock);
89
90error_ret:
91 return ret ? ret : len;
92}
93
94static IIO_DEV_ATTR_OUT_RAW(0, ad5446_write, 0);
95
96static ssize_t ad5446_show_scale(struct device *dev,
97 struct device_attribute *attr,
98 char *buf)
99{
100 struct iio_dev *dev_info = dev_get_drvdata(dev);
101 struct ad5446_state *st = iio_priv(dev_info);
102 /* Corresponds to Vref / 2^(bits) */
103 unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
104
105 return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
106}
107static IIO_DEVICE_ATTR(out_scale, S_IRUGO, ad5446_show_scale, NULL, 0);
108
109static ssize_t ad5446_write_powerdown_mode(struct device *dev,
110 struct device_attribute *attr,
111 const char *buf, size_t len)
112{
113 struct iio_dev *dev_info = dev_get_drvdata(dev);
114 struct ad5446_state *st = iio_priv(dev_info);
115
116 if (sysfs_streq(buf, "1kohm_to_gnd"))
117 st->pwr_down_mode = MODE_PWRDWN_1k;
118 else if (sysfs_streq(buf, "100kohm_to_gnd"))
119 st->pwr_down_mode = MODE_PWRDWN_100k;
120 else if (sysfs_streq(buf, "three_state"))
121 st->pwr_down_mode = MODE_PWRDWN_TRISTATE;
122 else
123 return -EINVAL;
124
125 return len;
126}
127
128static ssize_t ad5446_read_powerdown_mode(struct device *dev,
129 struct device_attribute *attr, char *buf)
130{
131 struct iio_dev *dev_info = dev_get_drvdata(dev);
132 struct ad5446_state *st = iio_priv(dev_info);
133
134 char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
135
136 return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
137}
138
139static ssize_t ad5446_read_dac_powerdown(struct device *dev,
140 struct device_attribute *attr,
141 char *buf)
142{
143 struct iio_dev *dev_info = dev_get_drvdata(dev);
144 struct ad5446_state *st = iio_priv(dev_info);
145
146 return sprintf(buf, "%d\n", st->pwr_down);
147}
148
149static ssize_t ad5446_write_dac_powerdown(struct device *dev,
150 struct device_attribute *attr,
151 const char *buf, size_t len)
152{
153 struct iio_dev *dev_info = dev_get_drvdata(dev);
154 struct ad5446_state *st = iio_priv(dev_info);
155 unsigned long readin;
156 int ret;
157
158 ret = strict_strtol(buf, 10, &readin);
159 if (ret)
160 return ret;
161
162 if (readin > 1)
163 ret = -EINVAL;
164
165 mutex_lock(&dev_info->mlock);
166 st->pwr_down = readin;
167
168 if (st->pwr_down)
169 st->chip_info->store_pwr_down(st, st->pwr_down_mode);
170 else
171 st->chip_info->store_sample(st, st->cached_val);
172
173 ret = spi_sync(st->spi, &st->msg);
174 mutex_unlock(&dev_info->mlock);
175
176 return ret ? ret : len;
177}
178
179static IIO_DEVICE_ATTR(out_powerdown_mode, S_IRUGO | S_IWUSR,
180 ad5446_read_powerdown_mode,
181 ad5446_write_powerdown_mode, 0);
182
183static IIO_CONST_ATTR(out_powerdown_mode_available,
184 "1kohm_to_gnd 100kohm_to_gnd three_state");
185
186static IIO_DEVICE_ATTR(out0_powerdown, S_IRUGO | S_IWUSR,
187 ad5446_read_dac_powerdown,
188 ad5446_write_dac_powerdown, 0);
189
190static struct attribute *ad5446_attributes[] = {
191 &iio_dev_attr_out0_raw.dev_attr.attr,
192 &iio_dev_attr_out_scale.dev_attr.attr,
193 &iio_dev_attr_out0_powerdown.dev_attr.attr,
194 &iio_dev_attr_out_powerdown_mode.dev_attr.attr,
195 &iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
196 NULL,
197};
198
199static mode_t ad5446_attr_is_visible(struct kobject *kobj,
200 struct attribute *attr, int n)
201{
202 struct device *dev = container_of(kobj, struct device, kobj);
203 struct iio_dev *dev_info = dev_get_drvdata(dev);
204 struct ad5446_state *st = iio_priv(dev_info);
205
206 mode_t mode = attr->mode;
207
208 if (!st->chip_info->store_pwr_down &&
209 (attr == &iio_dev_attr_out0_powerdown.dev_attr.attr ||
210 attr == &iio_dev_attr_out_powerdown_mode.dev_attr.attr ||
211 attr ==
212 &iio_const_attr_out_powerdown_mode_available.dev_attr.attr))
213 mode = 0;
214
215 return mode;
216}
217
218static const struct attribute_group ad5446_attribute_group = {
219 .attrs = ad5446_attributes,
220 .is_visible = ad5446_attr_is_visible,
221};
222
223static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {
224 [ID_AD5444] = {
225 .bits = 12,
226 .storagebits = 16,
227 .left_shift = 2,
228 .store_sample = ad5446_store_sample,
229 },
230 [ID_AD5446] = {
231 .bits = 14,
232 .storagebits = 16,
233 .left_shift = 0,
234 .store_sample = ad5446_store_sample,
235 },
236 [ID_AD5541A] = {
237 .bits = 16,
238 .storagebits = 16,
239 .left_shift = 0,
240 .store_sample = ad5542_store_sample,
241 },
242 [ID_AD5542A] = {
243 .bits = 16,
244 .storagebits = 16,
245 .left_shift = 0,
246 .store_sample = ad5542_store_sample,
247 },
248 [ID_AD5543] = {
249 .bits = 16,
250 .storagebits = 16,
251 .left_shift = 0,
252 .store_sample = ad5542_store_sample,
253 },
254 [ID_AD5512A] = {
255 .bits = 12,
256 .storagebits = 16,
257 .left_shift = 4,
258 .store_sample = ad5542_store_sample,
259 },
260 [ID_AD5553] = {
261 .bits = 14,
262 .storagebits = 16,
263 .left_shift = 0,
264 .store_sample = ad5542_store_sample,
265 },
266 [ID_AD5601] = {
267 .bits = 8,
268 .storagebits = 16,
269 .left_shift = 6,
270 .store_sample = ad5542_store_sample,
271 .store_pwr_down = ad5620_store_pwr_down,
272 },
273 [ID_AD5611] = {
274 .bits = 10,
275 .storagebits = 16,
276 .left_shift = 4,
277 .store_sample = ad5542_store_sample,
278 .store_pwr_down = ad5620_store_pwr_down,
279 },
280 [ID_AD5621] = {
281 .bits = 12,
282 .storagebits = 16,
283 .left_shift = 2,
284 .store_sample = ad5542_store_sample,
285 .store_pwr_down = ad5620_store_pwr_down,
286 },
287 [ID_AD5620_2500] = {
288 .bits = 12,
289 .storagebits = 16,
290 .left_shift = 2,
291 .int_vref_mv = 2500,
292 .store_sample = ad5620_store_sample,
293 .store_pwr_down = ad5620_store_pwr_down,
294 },
295 [ID_AD5620_1250] = {
296 .bits = 12,
297 .storagebits = 16,
298 .left_shift = 2,
299 .int_vref_mv = 1250,
300 .store_sample = ad5620_store_sample,
301 .store_pwr_down = ad5620_store_pwr_down,
302 },
303 [ID_AD5640_2500] = {
304 .bits = 14,
305 .storagebits = 16,
306 .left_shift = 0,
307 .int_vref_mv = 2500,
308 .store_sample = ad5620_store_sample,
309 .store_pwr_down = ad5620_store_pwr_down,
310 },
311 [ID_AD5640_1250] = {
312 .bits = 14,
313 .storagebits = 16,
314 .left_shift = 0,
315 .int_vref_mv = 1250,
316 .store_sample = ad5620_store_sample,
317 .store_pwr_down = ad5620_store_pwr_down,
318 },
319 [ID_AD5660_2500] = {
320 .bits = 16,
321 .storagebits = 24,
322 .left_shift = 0,
323 .int_vref_mv = 2500,
324 .store_sample = ad5660_store_sample,
325 .store_pwr_down = ad5660_store_pwr_down,
326 },
327 [ID_AD5660_1250] = {
328 .bits = 16,
329 .storagebits = 24,
330 .left_shift = 0,
331 .int_vref_mv = 1250,
332 .store_sample = ad5660_store_sample,
333 .store_pwr_down = ad5660_store_pwr_down,
334 },
335};
336
337static const struct iio_info ad5446_info = {
338 .attrs = &ad5446_attribute_group,
339 .driver_module = THIS_MODULE,
340};
341
342static int __devinit ad5446_probe(struct spi_device *spi)
343{
344 struct ad5446_state *st;
345 struct iio_dev *indio_dev;
346 struct regulator *reg;
347 int ret, voltage_uv = 0;
348
349 reg = regulator_get(&spi->dev, "vcc");
350 if (!IS_ERR(reg)) {
351 ret = regulator_enable(reg);
352 if (ret)
353 goto error_put_reg;
354
355 voltage_uv = regulator_get_voltage(reg);
356 }
357
358 indio_dev = iio_allocate_device(sizeof(*st));
359 if (indio_dev == NULL) {
360 ret = -ENOMEM;
361 goto error_disable_reg;
362 }
363 st = iio_priv(indio_dev);
364 st->chip_info =
365 &ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data];
366
367 spi_set_drvdata(spi, indio_dev);
368 st->reg = reg;
369 st->spi = spi;
370
371 /* Estabilish that the iio_dev is a child of the spi device */
372 indio_dev->dev.parent = &spi->dev;
373 indio_dev->name = spi_get_device_id(spi)->name;
374 indio_dev->info = &ad5446_info;
375 indio_dev->modes = INDIO_DIRECT_MODE;
376
377 /* Setup default message */
378
379 st->xfer.tx_buf = &st->data;
380 st->xfer.len = st->chip_info->storagebits / 8;
381
382 spi_message_init(&st->msg);
383 spi_message_add_tail(&st->xfer, &st->msg);
384
385 switch (spi_get_device_id(spi)->driver_data) {
386 case ID_AD5620_2500:
387 case ID_AD5620_1250:
388 case ID_AD5640_2500:
389 case ID_AD5640_1250:
390 case ID_AD5660_2500:
391 case ID_AD5660_1250:
392 st->vref_mv = st->chip_info->int_vref_mv;
393 break;
394 default:
395 if (voltage_uv)
396 st->vref_mv = voltage_uv / 1000;
397 else
398 dev_warn(&spi->dev,
399 "reference voltage unspecified\n");
400 }
401
402 ret = iio_device_register(indio_dev);
403 if (ret)
404 goto error_free_device;
405
406 return 0;
407
408error_free_device:
409 iio_free_device(indio_dev);
410error_disable_reg:
411 if (!IS_ERR(reg))
412 regulator_disable(reg);
413error_put_reg:
414 if (!IS_ERR(reg))
415 regulator_put(reg);
416
417 return ret;
418}
419
420static int ad5446_remove(struct spi_device *spi)
421{
422 struct iio_dev *indio_dev = spi_get_drvdata(spi);
423 struct ad5446_state *st = iio_priv(indio_dev);
424 struct regulator *reg = st->reg;
425
426 iio_device_unregister(indio_dev);
427 if (!IS_ERR(reg)) {
428 regulator_disable(reg);
429 regulator_put(reg);
430 }
431 return 0;
432}
433
434static const struct spi_device_id ad5446_id[] = {
435 {"ad5444", ID_AD5444},
436 {"ad5446", ID_AD5446},
437 {"ad5512a", ID_AD5512A},
438 {"ad5541a", ID_AD5541A},
439 {"ad5542a", ID_AD5542A},
440 {"ad5543", ID_AD5543},
441 {"ad5553", ID_AD5553},
442 {"ad5601", ID_AD5601},
443 {"ad5611", ID_AD5611},
444 {"ad5621", ID_AD5621},
445 {"ad5620-2500", ID_AD5620_2500}, /* AD5620/40/60: */
446 {"ad5620-1250", ID_AD5620_1250}, /* part numbers may look differently */
447 {"ad5640-2500", ID_AD5640_2500},
448 {"ad5640-1250", ID_AD5640_1250},
449 {"ad5660-2500", ID_AD5660_2500},
450 {"ad5660-1250", ID_AD5660_1250},
451 {}
452};
453
454static struct spi_driver ad5446_driver = {
455 .driver = {
456 .name = "ad5446",
457 .bus = &spi_bus_type,
458 .owner = THIS_MODULE,
459 },
460 .probe = ad5446_probe,
461 .remove = __devexit_p(ad5446_remove),
462 .id_table = ad5446_id,
463};
464
465static int __init ad5446_init(void)
466{
467 return spi_register_driver(&ad5446_driver);
468}
469module_init(ad5446_init);
470
471static void __exit ad5446_exit(void)
472{
473 spi_unregister_driver(&ad5446_driver);
474}
475module_exit(ad5446_exit);
476
477MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
478MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC");
479MODULE_LICENSE("GPL v2");
480MODULE_ALIAS("spi:ad5446");
diff --git a/drivers/staging/iio/dac/ad5446.h b/drivers/staging/iio/dac/ad5446.h
new file mode 100644
index 00000000000..7118d653ac3
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5446.h
@@ -0,0 +1,109 @@
1/*
2 * AD5446 SPI DAC driver
3 *
4 * Copyright 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8#ifndef IIO_DAC_AD5446_H_
9#define IIO_DAC_AD5446_H_
10
11/* DAC Control Bits */
12
13#define AD5446_LOAD (0x0 << 14) /* Load and update */
14#define AD5446_SDO_DIS (0x1 << 14) /* Disable SDO */
15#define AD5446_NOP (0x2 << 14) /* No operation */
16#define AD5446_CLK_RISING (0x3 << 14) /* Clock data on rising edge */
17
18#define AD5620_LOAD (0x0 << 14) /* Load and update Norm Operation*/
19#define AD5620_PWRDWN_1k (0x1 << 14) /* Power-down: 1kOhm to GND */
20#define AD5620_PWRDWN_100k (0x2 << 14) /* Power-down: 100kOhm to GND */
21#define AD5620_PWRDWN_TRISTATE (0x3 << 14) /* Power-down: Three-state */
22
23#define AD5660_LOAD (0x0 << 16) /* Load and update Norm Operation*/
24#define AD5660_PWRDWN_1k (0x1 << 16) /* Power-down: 1kOhm to GND */
25#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */
26#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */
27
28#define RES_MASK(bits) ((1 << (bits)) - 1)
29
30#define MODE_PWRDWN_1k 0x1
31#define MODE_PWRDWN_100k 0x2
32#define MODE_PWRDWN_TRISTATE 0x3
33
34/**
35 * struct ad5446_state - driver instance specific data
36 * @spi: spi_device
37 * @chip_info: chip model specific constants, available modes etc
38 * @reg: supply regulator
39 * @poll_work: bottom half of polling interrupt handler
40 * @vref_mv: actual reference voltage used
41 * @xfer: default spi transfer
42 * @msg: default spi message
43 * @data: spi transmit buffer
44 */
45
46struct ad5446_state {
47 struct spi_device *spi;
48 const struct ad5446_chip_info *chip_info;
49 struct regulator *reg;
50 struct work_struct poll_work;
51 unsigned short vref_mv;
52 unsigned cached_val;
53 unsigned pwr_down_mode;
54 unsigned pwr_down;
55 struct spi_transfer xfer;
56 struct spi_message msg;
57 union {
58 unsigned short d16;
59 unsigned char d24[3];
60 } data;
61};
62
63/**
64 * struct ad5446_chip_info - chip specific information
65 * @bits: accuracy of the DAC in bits
66 * @storagebits: number of bits written to the DAC
67 * @left_shift: number of bits the datum must be shifted
68 * @int_vref_mv: AD5620/40/60: the internal reference voltage
69 * @store_sample: chip specific helper function to store the datum
70 * @store_sample: chip specific helper function to store the powerpown cmd
71 */
72
73struct ad5446_chip_info {
74 u8 bits;
75 u8 storagebits;
76 u8 left_shift;
77 u16 int_vref_mv;
78 void (*store_sample) (struct ad5446_state *st, unsigned val);
79 void (*store_pwr_down) (struct ad5446_state *st, unsigned mode);
80};
81
82/**
83 * ad5446_supported_device_ids:
84 * The AD5620/40/60 parts are available in different fixed internal reference
85 * voltage options. The actual part numbers may look differently
86 * (and a bit cryptic), however this style is used to make clear which
87 * parts are supported here.
88 */
89
90enum ad5446_supported_device_ids {
91 ID_AD5444,
92 ID_AD5446,
93 ID_AD5541A,
94 ID_AD5542A,
95 ID_AD5543,
96 ID_AD5512A,
97 ID_AD5553,
98 ID_AD5601,
99 ID_AD5611,
100 ID_AD5621,
101 ID_AD5620_2500,
102 ID_AD5620_1250,
103 ID_AD5640_2500,
104 ID_AD5640_1250,
105 ID_AD5660_2500,
106 ID_AD5660_1250,
107};
108
109#endif /* IIO_DAC_AD5446_H_ */
diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c
new file mode 100644
index 00000000000..1915f459868
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5504.c
@@ -0,0 +1,397 @@
1/*
2 * AD5504, AD5501 High Voltage Digital to Analog Converter
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/gpio.h>
11#include <linux/fs.h>
12#include <linux/device.h>
13#include <linux/kernel.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17#include <linux/regulator/consumer.h>
18
19#include "../iio.h"
20#include "../sysfs.h"
21#include "dac.h"
22#include "ad5504.h"
23
24static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
25{
26 u16 tmp = cpu_to_be16(AD5504_CMD_WRITE |
27 AD5504_ADDR(addr) |
28 (val & AD5504_RES_MASK));
29
30 return spi_write(spi, (u8 *)&tmp, 2);
31}
32
33static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
34{
35 u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr));
36 int ret;
37 struct spi_transfer t = {
38 .tx_buf = &tmp,
39 .rx_buf = val,
40 .len = 2,
41 };
42 struct spi_message m;
43
44 spi_message_init(&m);
45 spi_message_add_tail(&t, &m);
46 ret = spi_sync(spi, &m);
47
48 *val = be16_to_cpu(*val) & AD5504_RES_MASK;
49
50 return ret;
51}
52
53static ssize_t ad5504_write_dac(struct device *dev,
54 struct device_attribute *attr,
55 const char *buf, size_t len)
56{
57 struct iio_dev *indio_dev = dev_get_drvdata(dev);
58 struct ad5504_state *st = iio_priv(indio_dev);
59 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
60 long readin;
61 int ret;
62
63 ret = strict_strtol(buf, 10, &readin);
64 if (ret)
65 return ret;
66
67 ret = ad5504_spi_write(st->spi, this_attr->address, readin);
68 return ret ? ret : len;
69}
70
71static ssize_t ad5504_read_dac(struct device *dev,
72 struct device_attribute *attr,
73 char *buf)
74{
75 struct iio_dev *indio_dev = dev_get_drvdata(dev);
76 struct ad5504_state *st = iio_priv(indio_dev);
77 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
78 int ret;
79 u16 val;
80
81 ret = ad5504_spi_read(st->spi, this_attr->address, &val);
82 if (ret)
83 return ret;
84
85 return sprintf(buf, "%d\n", val);
86}
87
88static ssize_t ad5504_read_powerdown_mode(struct device *dev,
89 struct device_attribute *attr, char *buf)
90{
91 struct iio_dev *indio_dev = dev_get_drvdata(dev);
92 struct ad5504_state *st = iio_priv(indio_dev);
93
94 const char mode[][14] = {"20kohm_to_gnd", "three_state"};
95
96 return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
97}
98
99static ssize_t ad5504_write_powerdown_mode(struct device *dev,
100 struct device_attribute *attr,
101 const char *buf, size_t len)
102{
103 struct iio_dev *indio_dev = dev_get_drvdata(dev);
104 struct ad5504_state *st = iio_priv(indio_dev);
105 int ret;
106
107 if (sysfs_streq(buf, "20kohm_to_gnd"))
108 st->pwr_down_mode = AD5504_DAC_PWRDN_20K;
109 else if (sysfs_streq(buf, "three_state"))
110 st->pwr_down_mode = AD5504_DAC_PWRDN_3STATE;
111 else
112 ret = -EINVAL;
113
114 return ret ? ret : len;
115}
116
117static ssize_t ad5504_read_dac_powerdown(struct device *dev,
118 struct device_attribute *attr,
119 char *buf)
120{
121 struct iio_dev *indio_dev = dev_get_drvdata(dev);
122 struct ad5504_state *st = iio_priv(indio_dev);
123 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
124
125 return sprintf(buf, "%d\n",
126 !(st->pwr_down_mask & (1 << this_attr->address)));
127}
128
129static ssize_t ad5504_write_dac_powerdown(struct device *dev,
130 struct device_attribute *attr,
131 const char *buf, size_t len)
132{
133 long readin;
134 int ret;
135 struct iio_dev *indio_dev = dev_get_drvdata(dev);
136 struct ad5504_state *st = iio_priv(indio_dev);
137 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
138
139 ret = strict_strtol(buf, 10, &readin);
140 if (ret)
141 return ret;
142
143 if (readin == 0)
144 st->pwr_down_mask |= (1 << this_attr->address);
145 else if (readin == 1)
146 st->pwr_down_mask &= ~(1 << this_attr->address);
147 else
148 ret = -EINVAL;
149
150 ret = ad5504_spi_write(st->spi, AD5504_ADDR_CTRL,
151 AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) |
152 AD5504_DAC_PWR(st->pwr_down_mask));
153
154 /* writes to the CTRL register must be followed by a NOOP */
155 ad5504_spi_write(st->spi, AD5504_ADDR_NOOP, 0);
156
157 return ret ? ret : len;
158}
159
160static ssize_t ad5504_show_scale(struct device *dev,
161 struct device_attribute *attr,
162 char *buf)
163{
164 struct iio_dev *indio_dev = dev_get_drvdata(dev);
165 struct ad5504_state *st = iio_priv(indio_dev);
166 /* Corresponds to Vref / 2^(bits) */
167 unsigned int scale_uv = (st->vref_mv * 1000) >> AD5505_BITS;
168
169 return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
170}
171static IIO_DEVICE_ATTR(out_scale, S_IRUGO, ad5504_show_scale, NULL, 0);
172
173#define IIO_DEV_ATTR_OUT_RW_RAW(_num, _show, _store, _addr) \
174 IIO_DEVICE_ATTR(out##_num##_raw, \
175 S_IRUGO | S_IWUSR, _show, _store, _addr)
176
177static IIO_DEV_ATTR_OUT_RW_RAW(0, ad5504_read_dac,
178 ad5504_write_dac, AD5504_ADDR_DAC0);
179static IIO_DEV_ATTR_OUT_RW_RAW(1, ad5504_read_dac,
180 ad5504_write_dac, AD5504_ADDR_DAC1);
181static IIO_DEV_ATTR_OUT_RW_RAW(2, ad5504_read_dac,
182 ad5504_write_dac, AD5504_ADDR_DAC2);
183static IIO_DEV_ATTR_OUT_RW_RAW(3, ad5504_read_dac,
184 ad5504_write_dac, AD5504_ADDR_DAC3);
185
186static IIO_DEVICE_ATTR(out_powerdown_mode, S_IRUGO |
187 S_IWUSR, ad5504_read_powerdown_mode,
188 ad5504_write_powerdown_mode, 0);
189
190static IIO_CONST_ATTR(out_powerdown_mode_available,
191 "20kohm_to_gnd three_state");
192
193#define IIO_DEV_ATTR_DAC_POWERDOWN(_num, _show, _store, _addr) \
194 IIO_DEVICE_ATTR(out##_num##_powerdown, \
195 S_IRUGO | S_IWUSR, _show, _store, _addr)
196
197static IIO_DEV_ATTR_DAC_POWERDOWN(0, ad5504_read_dac_powerdown,
198 ad5504_write_dac_powerdown, 0);
199static IIO_DEV_ATTR_DAC_POWERDOWN(1, ad5504_read_dac_powerdown,
200 ad5504_write_dac_powerdown, 1);
201static IIO_DEV_ATTR_DAC_POWERDOWN(2, ad5504_read_dac_powerdown,
202 ad5504_write_dac_powerdown, 2);
203static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5504_read_dac_powerdown,
204 ad5504_write_dac_powerdown, 3);
205
206static struct attribute *ad5504_attributes[] = {
207 &iio_dev_attr_out0_raw.dev_attr.attr,
208 &iio_dev_attr_out1_raw.dev_attr.attr,
209 &iio_dev_attr_out2_raw.dev_attr.attr,
210 &iio_dev_attr_out3_raw.dev_attr.attr,
211 &iio_dev_attr_out0_powerdown.dev_attr.attr,
212 &iio_dev_attr_out1_powerdown.dev_attr.attr,
213 &iio_dev_attr_out2_powerdown.dev_attr.attr,
214 &iio_dev_attr_out3_powerdown.dev_attr.attr,
215 &iio_dev_attr_out_powerdown_mode.dev_attr.attr,
216 &iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
217 &iio_dev_attr_out_scale.dev_attr.attr,
218 NULL,
219};
220
221static const struct attribute_group ad5504_attribute_group = {
222 .attrs = ad5504_attributes,
223};
224
225static struct attribute *ad5501_attributes[] = {
226 &iio_dev_attr_out0_raw.dev_attr.attr,
227 &iio_dev_attr_out0_powerdown.dev_attr.attr,
228 &iio_dev_attr_out_powerdown_mode.dev_attr.attr,
229 &iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
230 &iio_dev_attr_out_scale.dev_attr.attr,
231 NULL,
232};
233
234static const struct attribute_group ad5501_attribute_group = {
235 .attrs = ad5501_attributes,
236};
237
238static IIO_CONST_ATTR(temp0_thresh_rising_value, "110000");
239static IIO_CONST_ATTR(temp0_thresh_rising_en, "1");
240
241static struct attribute *ad5504_ev_attributes[] = {
242 &iio_const_attr_temp0_thresh_rising_value.dev_attr.attr,
243 &iio_const_attr_temp0_thresh_rising_en.dev_attr.attr,
244 NULL,
245};
246
247static struct attribute_group ad5504_ev_attribute_group = {
248 .attrs = ad5504_ev_attributes,
249};
250
251static irqreturn_t ad5504_event_handler(int irq, void *private)
252{
253 iio_push_event(private, 0,
254 IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_TEMP,
255 0,
256 IIO_EV_TYPE_THRESH,
257 IIO_EV_DIR_RISING),
258 iio_get_time_ns());
259
260 return IRQ_HANDLED;
261}
262
263static const struct iio_info ad5504_info = {
264 .attrs = &ad5504_attribute_group,
265 .num_interrupt_lines = 1,
266 .event_attrs = &ad5504_ev_attribute_group,
267 .driver_module = THIS_MODULE,
268};
269
270static const struct iio_info ad5501_info = {
271 .attrs = &ad5501_attribute_group,
272 .num_interrupt_lines = 1,
273 .event_attrs = &ad5504_ev_attribute_group,
274 .driver_module = THIS_MODULE,
275};
276
277static int __devinit ad5504_probe(struct spi_device *spi)
278{
279 struct ad5504_platform_data *pdata = spi->dev.platform_data;
280 struct iio_dev *indio_dev;
281 struct ad5504_state *st;
282 struct regulator *reg;
283 int ret, voltage_uv = 0;
284
285 reg = regulator_get(&spi->dev, "vcc");
286 if (!IS_ERR(reg)) {
287 ret = regulator_enable(reg);
288 if (ret)
289 goto error_put_reg;
290
291 voltage_uv = regulator_get_voltage(reg);
292 }
293
294 indio_dev = iio_allocate_device(sizeof(*st));
295 if (indio_dev == NULL) {
296 ret = -ENOMEM;
297 goto error_disable_reg;
298 }
299 spi_set_drvdata(spi, indio_dev);
300 st = iio_priv(indio_dev);
301 if (voltage_uv)
302 st->vref_mv = voltage_uv / 1000;
303 else if (pdata)
304 st->vref_mv = pdata->vref_mv;
305 else
306 dev_warn(&spi->dev, "reference voltage unspecified\n");
307
308 st->reg = reg;
309 st->spi = spi;
310 indio_dev->dev.parent = &spi->dev;
311 indio_dev->name = spi_get_device_id(st->spi)->name;
312 if (spi_get_device_id(st->spi)->driver_data == ID_AD5501)
313 indio_dev->info = &ad5501_info;
314 else
315 indio_dev->info = &ad5504_info;
316 indio_dev->modes = INDIO_DIRECT_MODE;
317
318 ret = iio_device_register(indio_dev);
319 if (ret)
320 goto error_free_dev;
321
322 if (spi->irq) {
323 ret = request_threaded_irq(spi->irq,
324 NULL,
325 &ad5504_event_handler,
326 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
327 spi_get_device_id(st->spi)->name,
328 indio_dev);
329 if (ret)
330 goto error_unreg_iio_device;
331 }
332
333 return 0;
334
335error_unreg_iio_device:
336 iio_device_unregister(indio_dev);
337error_free_dev:
338 iio_free_device(indio_dev);
339error_disable_reg:
340 if (!IS_ERR(reg))
341 regulator_disable(st->reg);
342error_put_reg:
343 if (!IS_ERR(reg))
344 regulator_put(reg);
345
346 return ret;
347}
348
349static int __devexit ad5504_remove(struct spi_device *spi)
350{
351 struct iio_dev *indio_dev = spi_get_drvdata(spi);
352 struct ad5504_state *st = iio_priv(indio_dev);
353 struct regulator *reg = st->reg;
354 if (spi->irq)
355 free_irq(spi->irq, indio_dev);
356
357 iio_device_unregister(indio_dev);
358
359 if (!IS_ERR(reg)) {
360 regulator_disable(reg);
361 regulator_put(reg);
362 }
363
364 return 0;
365}
366
367static const struct spi_device_id ad5504_id[] = {
368 {"ad5504", ID_AD5504},
369 {"ad5501", ID_AD5501},
370 {}
371};
372
373static struct spi_driver ad5504_driver = {
374 .driver = {
375 .name = "ad5504",
376 .owner = THIS_MODULE,
377 },
378 .probe = ad5504_probe,
379 .remove = __devexit_p(ad5504_remove),
380 .id_table = ad5504_id,
381};
382
383static __init int ad5504_spi_init(void)
384{
385 return spi_register_driver(&ad5504_driver);
386}
387module_init(ad5504_spi_init);
388
389static __exit void ad5504_spi_exit(void)
390{
391 spi_unregister_driver(&ad5504_driver);
392}
393module_exit(ad5504_spi_exit);
394
395MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
396MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC");
397MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5504.h b/drivers/staging/iio/dac/ad5504.h
new file mode 100644
index 00000000000..85beb1dd29b
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5504.h
@@ -0,0 +1,68 @@
1/*
2 * AD5504 SPI DAC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#ifndef SPI_AD5504_H_
10#define SPI_AD5504_H_
11
12#define AD5505_BITS 12
13#define AD5504_RES_MASK ((1 << (AD5505_BITS)) - 1)
14
15#define AD5504_CMD_READ (1 << 15)
16#define AD5504_CMD_WRITE (0 << 15)
17#define AD5504_ADDR(addr) ((addr) << 12)
18
19/* Registers */
20#define AD5504_ADDR_NOOP 0
21#define AD5504_ADDR_DAC0 1
22#define AD5504_ADDR_DAC1 2
23#define AD5504_ADDR_DAC2 3
24#define AD5504_ADDR_DAC3 4
25#define AD5504_ADDR_ALL_DAC 5
26#define AD5504_ADDR_CTRL 7
27
28/* Control Register */
29#define AD5504_DAC_PWR(ch) ((ch) << 2)
30#define AD5504_DAC_PWRDWN_MODE(mode) ((mode) << 6)
31#define AD5504_DAC_PWRDN_20K 0
32#define AD5504_DAC_PWRDN_3STATE 1
33
34/*
35 * TODO: struct ad5504_platform_data needs to go into include/linux/iio
36 */
37
38struct ad5504_platform_data {
39 u16 vref_mv;
40};
41
42/**
43 * struct ad5446_state - driver instance specific data
44 * @us: spi_device
45 * @reg: supply regulator
46 * @vref_mv: actual reference voltage used
47 * @pwr_down_mask power down mask
48 * @pwr_down_mode current power down mode
49 */
50
51struct ad5504_state {
52 struct spi_device *spi;
53 struct regulator *reg;
54 unsigned short vref_mv;
55 unsigned pwr_down_mask;
56 unsigned pwr_down_mode;
57};
58
59/**
60 * ad5504_supported_device_ids:
61 */
62
63enum ad5504_supported_device_ids {
64 ID_AD5504,
65 ID_AD5501,
66};
67
68#endif /* SPI_AD5504_H_ */
diff --git a/drivers/staging/iio/dac/ad5624r.h b/drivers/staging/iio/dac/ad5624r.h
new file mode 100644
index 00000000000..b71c6a03e78
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5624r.h
@@ -0,0 +1,79 @@
1/*
2 * AD5624R SPI DAC driver
3 *
4 * Copyright 2010-2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8#ifndef SPI_AD5624R_H_
9#define SPI_AD5624R_H_
10
11#define AD5624R_DAC_CHANNELS 4
12
13#define AD5624R_ADDR_DAC0 0x0
14#define AD5624R_ADDR_DAC1 0x1
15#define AD5624R_ADDR_DAC2 0x2
16#define AD5624R_ADDR_DAC3 0x3
17#define AD5624R_ADDR_ALL_DAC 0x7
18
19#define AD5624R_CMD_WRITE_INPUT_N 0x0
20#define AD5624R_CMD_UPDATE_DAC_N 0x1
21#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_ALL 0x2
22#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_N 0x3
23#define AD5624R_CMD_POWERDOWN_DAC 0x4
24#define AD5624R_CMD_RESET 0x5
25#define AD5624R_CMD_LDAC_SETUP 0x6
26#define AD5624R_CMD_INTERNAL_REFER_SETUP 0x7
27
28#define AD5624R_LDAC_PWRDN_NONE 0x0
29#define AD5624R_LDAC_PWRDN_1K 0x1
30#define AD5624R_LDAC_PWRDN_100K 0x2
31#define AD5624R_LDAC_PWRDN_3STATE 0x3
32
33/**
34 * struct ad5624r_chip_info - chip specific information
35 * @bits: accuracy of the DAC in bits
36 * @int_vref_mv: AD5620/40/60: the internal reference voltage
37 */
38
39struct ad5624r_chip_info {
40 u8 bits;
41 u16 int_vref_mv;
42};
43
44/**
45 * struct ad5446_state - driver instance specific data
46 * @indio_dev: the industrial I/O device
47 * @us: spi_device
48 * @chip_info: chip model specific constants, available modes etc
49 * @reg: supply regulator
50 * @vref_mv: actual reference voltage used
51 * @pwr_down_mask power down mask
52 * @pwr_down_mode current power down mode
53 */
54
55struct ad5624r_state {
56 struct spi_device *us;
57 const struct ad5624r_chip_info *chip_info;
58 struct regulator *reg;
59 unsigned short vref_mv;
60 unsigned pwr_down_mask;
61 unsigned pwr_down_mode;
62};
63
64/**
65 * ad5624r_supported_device_ids:
66 * The AD5624/44/64 parts are available in different
67 * fixed internal reference voltage options.
68 */
69
70enum ad5624r_supported_device_ids {
71 ID_AD5624R3,
72 ID_AD5644R3,
73 ID_AD5664R3,
74 ID_AD5624R5,
75 ID_AD5644R5,
76 ID_AD5664R5,
77};
78
79#endif /* SPI_AD5624R_H_ */
diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c
new file mode 100644
index 00000000000..a5b3776718e
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5624r_spi.c
@@ -0,0 +1,336 @@
1/*
2 * AD5624R, AD5644R, AD5664R Digital to analog convertors spi driver
3 *
4 * Copyright 2010-2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/gpio.h>
11#include <linux/fs.h>
12#include <linux/device.h>
13#include <linux/kernel.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17#include <linux/regulator/consumer.h>
18
19#include "../iio.h"
20#include "../sysfs.h"
21#include "dac.h"
22#include "ad5624r.h"
23
24static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = {
25 [ID_AD5624R3] = {
26 .bits = 12,
27 .int_vref_mv = 1250,
28 },
29 [ID_AD5644R3] = {
30 .bits = 14,
31 .int_vref_mv = 1250,
32 },
33 [ID_AD5664R3] = {
34 .bits = 16,
35 .int_vref_mv = 1250,
36 },
37 [ID_AD5624R5] = {
38 .bits = 12,
39 .int_vref_mv = 2500,
40 },
41 [ID_AD5644R5] = {
42 .bits = 14,
43 .int_vref_mv = 2500,
44 },
45 [ID_AD5664R5] = {
46 .bits = 16,
47 .int_vref_mv = 2500,
48 },
49};
50
51static int ad5624r_spi_write(struct spi_device *spi,
52 u8 cmd, u8 addr, u16 val, u8 len)
53{
54 u32 data;
55 u8 msg[3];
56
57 /*
58 * The input shift register is 24 bits wide. The first two bits are
59 * don't care bits. The next three are the command bits, C2 to C0,
60 * followed by the 3-bit DAC address, A2 to A0, and then the
61 * 16-, 14-, 12-bit data-word. The data-word comprises the 16-,
62 * 14-, 12-bit input code followed by 0, 2, or 4 don't care bits,
63 * for the AD5664R, AD5644R, and AD5624R, respectively.
64 */
65 data = (0 << 22) | (cmd << 19) | (addr << 16) | (val << (16 - len));
66 msg[0] = data >> 16;
67 msg[1] = data >> 8;
68 msg[2] = data;
69
70 return spi_write(spi, msg, 3);
71}
72
73static ssize_t ad5624r_write_dac(struct device *dev,
74 struct device_attribute *attr,
75 const char *buf, size_t len)
76{
77 long readin;
78 int ret;
79 struct iio_dev *indio_dev = dev_get_drvdata(dev);
80 struct ad5624r_state *st = iio_priv(indio_dev);
81 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
82
83 ret = strict_strtol(buf, 10, &readin);
84 if (ret)
85 return ret;
86
87 ret = ad5624r_spi_write(st->us, AD5624R_CMD_WRITE_INPUT_N_UPDATE_N,
88 this_attr->address, readin,
89 st->chip_info->bits);
90 return ret ? ret : len;
91}
92
93static ssize_t ad5624r_read_powerdown_mode(struct device *dev,
94 struct device_attribute *attr, char *buf)
95{
96 struct iio_dev *indio_dev = dev_get_drvdata(dev);
97 struct ad5624r_state *st = iio_priv(indio_dev);
98
99 char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
100
101 return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
102}
103
104static ssize_t ad5624r_write_powerdown_mode(struct device *dev,
105 struct device_attribute *attr,
106 const char *buf, size_t len)
107{
108 struct iio_dev *indio_dev = dev_get_drvdata(dev);
109 struct ad5624r_state *st = iio_priv(indio_dev);
110 int ret;
111
112 if (sysfs_streq(buf, "1kohm_to_gnd"))
113 st->pwr_down_mode = AD5624R_LDAC_PWRDN_1K;
114 else if (sysfs_streq(buf, "100kohm_to_gnd"))
115 st->pwr_down_mode = AD5624R_LDAC_PWRDN_100K;
116 else if (sysfs_streq(buf, "three_state"))
117 st->pwr_down_mode = AD5624R_LDAC_PWRDN_3STATE;
118 else
119 ret = -EINVAL;
120
121 return ret ? ret : len;
122}
123
124static ssize_t ad5624r_read_dac_powerdown(struct device *dev,
125 struct device_attribute *attr,
126 char *buf)
127{
128 struct iio_dev *indio_dev = dev_get_drvdata(dev);
129 struct ad5624r_state *st = iio_priv(indio_dev);
130 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
131
132 return sprintf(buf, "%d\n",
133 !!(st->pwr_down_mask & (1 << this_attr->address)));
134}
135
136static ssize_t ad5624r_write_dac_powerdown(struct device *dev,
137 struct device_attribute *attr,
138 const char *buf, size_t len)
139{
140 long readin;
141 int ret;
142 struct iio_dev *indio_dev = dev_get_drvdata(dev);
143 struct ad5624r_state *st = iio_priv(indio_dev);
144 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
145
146 ret = strict_strtol(buf, 10, &readin);
147 if (ret)
148 return ret;
149
150 if (readin == 1)
151 st->pwr_down_mask |= (1 << this_attr->address);
152 else if (!readin)
153 st->pwr_down_mask &= ~(1 << this_attr->address);
154 else
155 ret = -EINVAL;
156
157 ret = ad5624r_spi_write(st->us, AD5624R_CMD_POWERDOWN_DAC, 0,
158 (st->pwr_down_mode << 4) |
159 st->pwr_down_mask, 16);
160
161 return ret ? ret : len;
162}
163
164static ssize_t ad5624r_show_scale(struct device *dev,
165 struct device_attribute *attr,
166 char *buf)
167{
168 struct iio_dev *indio_dev = dev_get_drvdata(dev);
169 struct ad5624r_state *st = iio_priv(indio_dev);
170 /* Corresponds to Vref / 2^(bits) */
171 unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
172
173 return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
174}
175static IIO_DEVICE_ATTR(out_scale, S_IRUGO, ad5624r_show_scale, NULL, 0);
176
177static IIO_DEV_ATTR_OUT_RAW(0, ad5624r_write_dac, AD5624R_ADDR_DAC0);
178static IIO_DEV_ATTR_OUT_RAW(1, ad5624r_write_dac, AD5624R_ADDR_DAC1);
179static IIO_DEV_ATTR_OUT_RAW(2, ad5624r_write_dac, AD5624R_ADDR_DAC2);
180static IIO_DEV_ATTR_OUT_RAW(3, ad5624r_write_dac, AD5624R_ADDR_DAC3);
181
182static IIO_DEVICE_ATTR(out_powerdown_mode, S_IRUGO |
183 S_IWUSR, ad5624r_read_powerdown_mode,
184 ad5624r_write_powerdown_mode, 0);
185
186static IIO_CONST_ATTR(out_powerdown_mode_available,
187 "1kohm_to_gnd 100kohm_to_gnd three_state");
188
189#define IIO_DEV_ATTR_DAC_POWERDOWN(_num, _show, _store, _addr) \
190 IIO_DEVICE_ATTR(out##_num##_powerdown, \
191 S_IRUGO | S_IWUSR, _show, _store, _addr)
192
193static IIO_DEV_ATTR_DAC_POWERDOWN(0, ad5624r_read_dac_powerdown,
194 ad5624r_write_dac_powerdown, 0);
195static IIO_DEV_ATTR_DAC_POWERDOWN(1, ad5624r_read_dac_powerdown,
196 ad5624r_write_dac_powerdown, 1);
197static IIO_DEV_ATTR_DAC_POWERDOWN(2, ad5624r_read_dac_powerdown,
198 ad5624r_write_dac_powerdown, 2);
199static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5624r_read_dac_powerdown,
200 ad5624r_write_dac_powerdown, 3);
201
202static struct attribute *ad5624r_attributes[] = {
203 &iio_dev_attr_out0_raw.dev_attr.attr,
204 &iio_dev_attr_out1_raw.dev_attr.attr,
205 &iio_dev_attr_out2_raw.dev_attr.attr,
206 &iio_dev_attr_out3_raw.dev_attr.attr,
207 &iio_dev_attr_out0_powerdown.dev_attr.attr,
208 &iio_dev_attr_out1_powerdown.dev_attr.attr,
209 &iio_dev_attr_out2_powerdown.dev_attr.attr,
210 &iio_dev_attr_out3_powerdown.dev_attr.attr,
211 &iio_dev_attr_out_powerdown_mode.dev_attr.attr,
212 &iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
213 &iio_dev_attr_out_scale.dev_attr.attr,
214 NULL,
215};
216
217static const struct attribute_group ad5624r_attribute_group = {
218 .attrs = ad5624r_attributes,
219};
220
221static const struct iio_info ad5624r_info = {
222 .attrs = &ad5624r_attribute_group,
223 .driver_module = THIS_MODULE,
224};
225
226static int __devinit ad5624r_probe(struct spi_device *spi)
227{
228 struct ad5624r_state *st;
229 struct iio_dev *indio_dev;
230 struct regulator *reg;
231 int ret, voltage_uv = 0;
232
233 reg = regulator_get(&spi->dev, "vcc");
234 if (!IS_ERR(reg)) {
235 ret = regulator_enable(reg);
236 if (ret)
237 goto error_put_reg;
238
239 voltage_uv = regulator_get_voltage(reg);
240 }
241 indio_dev = iio_allocate_device(sizeof(*st));
242 if (indio_dev == NULL) {
243 ret = -ENOMEM;
244 goto error_disable_reg;
245 }
246 st = iio_priv(indio_dev);
247 st->reg = reg;
248 spi_set_drvdata(spi, indio_dev);
249 st->chip_info =
250 &ad5624r_chip_info_tbl[spi_get_device_id(spi)->driver_data];
251
252 if (voltage_uv)
253 st->vref_mv = voltage_uv / 1000;
254 else
255 st->vref_mv = st->chip_info->int_vref_mv;
256
257 st->us = spi;
258
259 indio_dev->dev.parent = &spi->dev;
260 indio_dev->name = spi_get_device_id(spi)->name;
261 indio_dev->info = &ad5624r_info;
262 indio_dev->modes = INDIO_DIRECT_MODE;
263
264 ret = iio_device_register(indio_dev);
265 if (ret)
266 goto error_free_dev;
267
268 ret = ad5624r_spi_write(spi, AD5624R_CMD_INTERNAL_REFER_SETUP, 0,
269 !!voltage_uv, 16);
270 if (ret)
271 goto error_free_dev;
272
273 return 0;
274
275error_free_dev:
276 iio_free_device(indio_dev);
277error_disable_reg:
278 if (!IS_ERR(reg))
279 regulator_disable(reg);
280error_put_reg:
281 if (!IS_ERR(reg))
282 regulator_put(reg);
283
284 return ret;
285}
286
287static int __devexit ad5624r_remove(struct spi_device *spi)
288{
289 struct iio_dev *indio_dev = spi_get_drvdata(spi);
290 struct ad5624r_state *st = iio_priv(indio_dev);
291 struct regulator *reg = st->reg;
292
293 iio_device_unregister(indio_dev);
294 if (!IS_ERR(reg)) {
295 regulator_disable(reg);
296 regulator_put(reg);
297 }
298
299 return 0;
300}
301
302static const struct spi_device_id ad5624r_id[] = {
303 {"ad5624r3", ID_AD5624R3},
304 {"ad5644r3", ID_AD5644R3},
305 {"ad5664r3", ID_AD5664R3},
306 {"ad5624r5", ID_AD5624R5},
307 {"ad5644r5", ID_AD5644R5},
308 {"ad5664r5", ID_AD5664R5},
309 {}
310};
311
312static struct spi_driver ad5624r_driver = {
313 .driver = {
314 .name = "ad5624r",
315 .owner = THIS_MODULE,
316 },
317 .probe = ad5624r_probe,
318 .remove = __devexit_p(ad5624r_remove),
319 .id_table = ad5624r_id,
320};
321
322static __init int ad5624r_spi_init(void)
323{
324 return spi_register_driver(&ad5624r_driver);
325}
326module_init(ad5624r_spi_init);
327
328static __exit void ad5624r_spi_exit(void)
329{
330 spi_unregister_driver(&ad5624r_driver);
331}
332module_exit(ad5624r_spi_exit);
333
334MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
335MODULE_DESCRIPTION("Analog Devices AD5624/44/64R DAC spi driver");
336MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5686.c b/drivers/staging/iio/dac/ad5686.c
new file mode 100644
index 00000000000..fd67cfa5edb
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5686.c
@@ -0,0 +1,497 @@
1/*
2 * AD5686R, AD5685R, AD5684R Digital to analog converters driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/gpio.h>
11#include <linux/fs.h>
12#include <linux/device.h>
13#include <linux/kernel.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17#include <linux/regulator/consumer.h>
18
19#include "../iio.h"
20#include "../sysfs.h"
21#include "dac.h"
22
23#define AD5686_DAC_CHANNELS 4
24
25#define AD5686_ADDR(x) ((x) << 16)
26#define AD5686_CMD(x) ((x) << 20)
27
28#define AD5686_ADDR_DAC0 0x1
29#define AD5686_ADDR_DAC1 0x2
30#define AD5686_ADDR_DAC2 0x4
31#define AD5686_ADDR_DAC3 0x8
32#define AD5686_ADDR_ALL_DAC 0xF
33
34#define AD5686_CMD_NOOP 0x0
35#define AD5686_CMD_WRITE_INPUT_N 0x1
36#define AD5686_CMD_UPDATE_DAC_N 0x2
37#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3
38#define AD5686_CMD_POWERDOWN_DAC 0x4
39#define AD5686_CMD_LDAC_MASK 0x5
40#define AD5686_CMD_RESET 0x6
41#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7
42#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8
43#define AD5686_CMD_READBACK_ENABLE 0x9
44
45#define AD5686_LDAC_PWRDN_NONE 0x0
46#define AD5686_LDAC_PWRDN_1K 0x1
47#define AD5686_LDAC_PWRDN_100K 0x2
48#define AD5686_LDAC_PWRDN_3STATE 0x3
49
50/**
51 * struct ad5686_chip_info - chip specific information
52 * @int_vref_mv: AD5620/40/60: the internal reference voltage
53 * @channel: channel specification
54*/
55
56struct ad5686_chip_info {
57 u16 int_vref_mv;
58 struct iio_chan_spec channel[AD5686_DAC_CHANNELS];
59};
60
61/**
62 * struct ad5446_state - driver instance specific data
63 * @spi: spi_device
64 * @chip_info: chip model specific constants, available modes etc
65 * @reg: supply regulator
66 * @vref_mv: actual reference voltage used
67 * @pwr_down_mask: power down mask
68 * @pwr_down_mode: current power down mode
69 * @data: spi transfer buffers
70 */
71
72struct ad5686_state {
73 struct spi_device *spi;
74 const struct ad5686_chip_info *chip_info;
75 struct regulator *reg;
76 unsigned short vref_mv;
77 unsigned pwr_down_mask;
78 unsigned pwr_down_mode;
79 /*
80 * DMA (thus cache coherency maintenance) requires the
81 * transfer buffers to live in their own cache lines.
82 */
83
84 union {
85 u32 d32;
86 u8 d8[4];
87 } data[3] ____cacheline_aligned;
88};
89
90/**
91 * ad5686_supported_device_ids:
92 */
93
94enum ad5686_supported_device_ids {
95 ID_AD5684,
96 ID_AD5685,
97 ID_AD5686,
98};
99
100static const struct ad5686_chip_info ad5686_chip_info_tbl[] = {
101 [ID_AD5684] = {
102 .channel[0] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 0, 0,
103 (1 << IIO_CHAN_INFO_SCALE_SHARED),
104 AD5686_ADDR_DAC0,
105 0, IIO_ST('u', 12, 16, 4), 0),
106 .channel[1] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 1, 0,
107 (1 << IIO_CHAN_INFO_SCALE_SHARED),
108 AD5686_ADDR_DAC1,
109 1, IIO_ST('u', 12, 16, 4), 0),
110 .channel[2] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 2, 0,
111 (1 << IIO_CHAN_INFO_SCALE_SHARED),
112 AD5686_ADDR_DAC2,
113 2, IIO_ST('u', 12, 16, 4), 0),
114 .channel[3] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 3, 0,
115 (1 << IIO_CHAN_INFO_SCALE_SHARED),
116 AD5686_ADDR_DAC3,
117 3, IIO_ST('u', 12, 16, 4), 0),
118 .int_vref_mv = 2500,
119 },
120 [ID_AD5685] = {
121 .channel[0] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 0, 0,
122 (1 << IIO_CHAN_INFO_SCALE_SHARED),
123 AD5686_ADDR_DAC0,
124 0, IIO_ST('u', 14, 16, 2), 0),
125 .channel[1] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 1, 0,
126 (1 << IIO_CHAN_INFO_SCALE_SHARED),
127 AD5686_ADDR_DAC1,
128 1, IIO_ST('u', 14, 16, 2), 0),
129 .channel[2] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 2, 0,
130 (1 << IIO_CHAN_INFO_SCALE_SHARED),
131 AD5686_ADDR_DAC2,
132 2, IIO_ST('u', 14, 16, 2), 0),
133 .channel[3] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 3, 0,
134 (1 << IIO_CHAN_INFO_SCALE_SHARED),
135 AD5686_ADDR_DAC3,
136 3, IIO_ST('u', 14, 16, 2), 0),
137 .int_vref_mv = 2500,
138 },
139 [ID_AD5686] = {
140 .channel[0] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 0, 0,
141 (1 << IIO_CHAN_INFO_SCALE_SHARED),
142 AD5686_ADDR_DAC0,
143 0, IIO_ST('u', 16, 16, 0), 0),
144 .channel[1] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 1, 0,
145 (1 << IIO_CHAN_INFO_SCALE_SHARED),
146 AD5686_ADDR_DAC1,
147 1, IIO_ST('u', 16, 16, 0), 0),
148 .channel[2] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 2, 0,
149 (1 << IIO_CHAN_INFO_SCALE_SHARED),
150 AD5686_ADDR_DAC2,
151 2, IIO_ST('u', 16, 16, 0), 0),
152 .channel[3] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 3, 0,
153 (1 << IIO_CHAN_INFO_SCALE_SHARED),
154 AD5686_ADDR_DAC3,
155 3, IIO_ST('u', 16, 16, 0), 0),
156 .int_vref_mv = 2500,
157 },
158};
159
160static int ad5686_spi_write(struct ad5686_state *st,
161 u8 cmd, u8 addr, u16 val, u8 shift)
162{
163 val <<= shift;
164
165 st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
166 AD5686_ADDR(addr) |
167 val);
168
169 return spi_write(st->spi, &st->data[0].d8[1], 3);
170}
171
172static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
173{
174 struct spi_transfer t[] = {
175 {
176 .tx_buf = &st->data[0].d8[1],
177 .len = 3,
178 .cs_change = 1,
179 }, {
180 .tx_buf = &st->data[1].d8[1],
181 .rx_buf = &st->data[2].d8[1],
182 .len = 3,
183 },
184 };
185 struct spi_message m;
186 int ret;
187
188 spi_message_init(&m);
189 spi_message_add_tail(&t[0], &m);
190 spi_message_add_tail(&t[1], &m);
191
192 st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) |
193 AD5686_ADDR(addr));
194 st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
195
196 ret = spi_sync(st->spi, &m);
197 if (ret < 0)
198 return ret;
199
200 return be32_to_cpu(st->data[2].d32);
201}
202
203static ssize_t ad5686_read_powerdown_mode(struct device *dev,
204 struct device_attribute *attr, char *buf)
205{
206 struct iio_dev *indio_dev = dev_get_drvdata(dev);
207 struct ad5686_state *st = iio_priv(indio_dev);
208 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
209
210 char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
211
212 return sprintf(buf, "%s\n", mode[(st->pwr_down_mode >>
213 (this_attr->address * 2)) & 0x3]);
214}
215
216static ssize_t ad5686_write_powerdown_mode(struct device *dev,
217 struct device_attribute *attr,
218 const char *buf, size_t len)
219{
220 struct iio_dev *indio_dev = dev_get_drvdata(dev);
221 struct ad5686_state *st = iio_priv(indio_dev);
222 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
223 unsigned mode;
224
225 if (sysfs_streq(buf, "1kohm_to_gnd"))
226 mode = AD5686_LDAC_PWRDN_1K;
227 else if (sysfs_streq(buf, "100kohm_to_gnd"))
228 mode = AD5686_LDAC_PWRDN_100K;
229 else if (sysfs_streq(buf, "three_state"))
230 mode = AD5686_LDAC_PWRDN_3STATE;
231 else
232 return -EINVAL;
233
234 st->pwr_down_mode &= ~(0x3 << (this_attr->address * 2));
235 st->pwr_down_mode |= (mode << (this_attr->address * 2));
236
237 return len;
238}
239
240static ssize_t ad5686_read_dac_powerdown(struct device *dev,
241 struct device_attribute *attr,
242 char *buf)
243{
244 struct iio_dev *indio_dev = dev_get_drvdata(dev);
245 struct ad5686_state *st = iio_priv(indio_dev);
246 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
247
248 return sprintf(buf, "%d\n", !!(st->pwr_down_mask &
249 (0x3 << (this_attr->address * 2))));
250}
251
252static ssize_t ad5686_write_dac_powerdown(struct device *dev,
253 struct device_attribute *attr,
254 const char *buf, size_t len)
255{
256 bool readin;
257 int ret;
258 struct iio_dev *indio_dev = dev_get_drvdata(dev);
259 struct ad5686_state *st = iio_priv(indio_dev);
260 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
261
262 ret = strtobool(buf, &readin);
263 if (ret)
264 return ret;
265
266 if (readin == true)
267 st->pwr_down_mask |= (0x3 << (this_attr->address * 2));
268 else
269 st->pwr_down_mask &= ~(0x3 << (this_attr->address * 2));
270
271 ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0,
272 st->pwr_down_mask & st->pwr_down_mode, 0);
273
274 return ret ? ret : len;
275}
276
277static IIO_CONST_ATTR(out_powerdown_mode_available,
278 "1kohm_to_gnd 100kohm_to_gnd three_state");
279
280#define IIO_DEV_ATTR_DAC_POWERDOWN_MODE(_num) \
281 IIO_DEVICE_ATTR(out##_num##_powerdown_mode, S_IRUGO | S_IWUSR, \
282 ad5686_read_powerdown_mode, \
283 ad5686_write_powerdown_mode, _num)
284
285static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(0);
286static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(1);
287static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(2);
288static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(3);
289
290#define IIO_DEV_ATTR_DAC_POWERDOWN(_num) \
291 IIO_DEVICE_ATTR(out##_num##_powerdown, S_IRUGO | S_IWUSR, \
292 ad5686_read_dac_powerdown, \
293 ad5686_write_dac_powerdown, _num)
294
295static IIO_DEV_ATTR_DAC_POWERDOWN(0);
296static IIO_DEV_ATTR_DAC_POWERDOWN(1);
297static IIO_DEV_ATTR_DAC_POWERDOWN(2);
298static IIO_DEV_ATTR_DAC_POWERDOWN(3);
299
300static struct attribute *ad5686_attributes[] = {
301 &iio_dev_attr_out0_powerdown.dev_attr.attr,
302 &iio_dev_attr_out1_powerdown.dev_attr.attr,
303 &iio_dev_attr_out2_powerdown.dev_attr.attr,
304 &iio_dev_attr_out3_powerdown.dev_attr.attr,
305 &iio_dev_attr_out0_powerdown_mode.dev_attr.attr,
306 &iio_dev_attr_out1_powerdown_mode.dev_attr.attr,
307 &iio_dev_attr_out2_powerdown_mode.dev_attr.attr,
308 &iio_dev_attr_out3_powerdown_mode.dev_attr.attr,
309 &iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
310 NULL,
311};
312
313static const struct attribute_group ad5686_attribute_group = {
314 .attrs = ad5686_attributes,
315};
316
317static int ad5686_read_raw(struct iio_dev *indio_dev,
318 struct iio_chan_spec const *chan,
319 int *val,
320 int *val2,
321 long m)
322{
323 struct ad5686_state *st = iio_priv(indio_dev);
324 unsigned long scale_uv;
325 int ret;
326
327 switch (m) {
328 case 0:
329 mutex_lock(&indio_dev->mlock);
330 ret = ad5686_spi_read(st, chan->address);
331 mutex_unlock(&indio_dev->mlock);
332 if (ret < 0)
333 return ret;
334 *val = ret;
335 return IIO_VAL_INT;
336 break;
337 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
338 scale_uv = (st->vref_mv * 100000)
339 >> (chan->scan_type.realbits);
340 *val = scale_uv / 100000;
341 *val2 = (scale_uv % 100000) * 10;
342 return IIO_VAL_INT_PLUS_MICRO;
343
344 }
345 return -EINVAL;
346}
347
348static int ad5686_write_raw(struct iio_dev *indio_dev,
349 struct iio_chan_spec const *chan,
350 int val,
351 int val2,
352 long mask)
353{
354 struct ad5686_state *st = iio_priv(indio_dev);
355 int ret;
356
357 switch (mask) {
358 case 0:
359 if (val > (1 << chan->scan_type.realbits))
360 return -EINVAL;
361
362 mutex_lock(&indio_dev->mlock);
363 ret = ad5686_spi_write(st,
364 AD5686_CMD_WRITE_INPUT_N_UPDATE_N,
365 chan->address,
366 val,
367 chan->scan_type.shift);
368 mutex_unlock(&indio_dev->mlock);
369 break;
370 default:
371 ret = -EINVAL;
372 }
373
374 return ret;
375}
376
377static const struct iio_info ad5686_info = {
378 .read_raw = ad5686_read_raw,
379 .write_raw = ad5686_write_raw,
380 .attrs = &ad5686_attribute_group,
381 .driver_module = THIS_MODULE,
382};
383
384static int __devinit ad5686_probe(struct spi_device *spi)
385{
386 struct ad5686_state *st;
387 struct iio_dev *indio_dev;
388 int ret, regdone = 0, voltage_uv = 0;
389
390 indio_dev = iio_allocate_device(sizeof(*st));
391 if (indio_dev == NULL)
392 return -ENOMEM;
393
394 st = iio_priv(indio_dev);
395 spi_set_drvdata(spi, indio_dev);
396
397 st->reg = regulator_get(&spi->dev, "vcc");
398 if (!IS_ERR(st->reg)) {
399 ret = regulator_enable(st->reg);
400 if (ret)
401 goto error_put_reg;
402
403 voltage_uv = regulator_get_voltage(st->reg);
404 }
405
406 st->chip_info =
407 &ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data];
408
409 if (voltage_uv)
410 st->vref_mv = voltage_uv / 1000;
411 else
412 st->vref_mv = st->chip_info->int_vref_mv;
413
414 st->spi = spi;
415
416 indio_dev->dev.parent = &spi->dev;
417 indio_dev->name = spi_get_device_id(spi)->name;
418 indio_dev->info = &ad5686_info;
419 indio_dev->modes = INDIO_DIRECT_MODE;
420 indio_dev->channels = st->chip_info->channel;
421 indio_dev->num_channels = AD5686_DAC_CHANNELS;
422
423 ret = iio_device_register(indio_dev);
424 if (ret)
425 goto error_disable_reg;
426
427 regdone = 1;
428 ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0,
429 !!voltage_uv, 0);
430 if (ret)
431 goto error_disable_reg;
432
433 return 0;
434
435error_disable_reg:
436 if (!IS_ERR(st->reg))
437 regulator_disable(st->reg);
438error_put_reg:
439 if (!IS_ERR(st->reg))
440 regulator_put(st->reg);
441
442 if (regdone)
443 iio_device_unregister(indio_dev);
444 else
445 iio_free_device(indio_dev);
446
447 return ret;
448}
449
450static int __devexit ad5686_remove(struct spi_device *spi)
451{
452 struct iio_dev *indio_dev = spi_get_drvdata(spi);
453 struct ad5686_state *st = iio_priv(indio_dev);
454 struct regulator *reg = st->reg;
455
456 if (!IS_ERR(reg)) {
457 regulator_disable(reg);
458 regulator_put(reg);
459 }
460
461 iio_device_unregister(indio_dev);
462
463 return 0;
464}
465
466static const struct spi_device_id ad5686_id[] = {
467 {"ad5684", ID_AD5684},
468 {"ad5685", ID_AD5685},
469 {"ad5686", ID_AD5686},
470 {}
471};
472
473static struct spi_driver ad5686_driver = {
474 .driver = {
475 .name = "ad5686",
476 .owner = THIS_MODULE,
477 },
478 .probe = ad5686_probe,
479 .remove = __devexit_p(ad5686_remove),
480 .id_table = ad5686_id,
481};
482
483static __init int ad5686_spi_init(void)
484{
485 return spi_register_driver(&ad5686_driver);
486}
487module_init(ad5686_spi_init);
488
489static __exit void ad5686_spi_exit(void)
490{
491 spi_unregister_driver(&ad5686_driver);
492}
493module_exit(ad5686_spi_exit);
494
495MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
496MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC");
497MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c
new file mode 100644
index 00000000000..64770d2a1b4
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5791.c
@@ -0,0 +1,442 @@
1/*
2 * AD5760, AD5780, AD5781, AD5791 Voltage Output Digital to Analog Converter
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/gpio.h>
11#include <linux/fs.h>
12#include <linux/device.h>
13#include <linux/kernel.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17#include <linux/regulator/consumer.h>
18
19#include "../iio.h"
20#include "../sysfs.h"
21#include "dac.h"
22#include "ad5791.h"
23
24static int ad5791_spi_write(struct spi_device *spi, u8 addr, u32 val)
25{
26 union {
27 u32 d32;
28 u8 d8[4];
29 } data;
30
31 data.d32 = cpu_to_be32(AD5791_CMD_WRITE |
32 AD5791_ADDR(addr) |
33 (val & AD5791_DAC_MASK));
34
35 return spi_write(spi, &data.d8[1], 3);
36}
37
38static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val)
39{
40 union {
41 u32 d32;
42 u8 d8[4];
43 } data[3];
44 int ret;
45 struct spi_message msg;
46 struct spi_transfer xfers[] = {
47 {
48 .tx_buf = &data[0].d8[1],
49 .bits_per_word = 8,
50 .len = 3,
51 .cs_change = 1,
52 }, {
53 .tx_buf = &data[1].d8[1],
54 .rx_buf = &data[2].d8[1],
55 .bits_per_word = 8,
56 .len = 3,
57 },
58 };
59
60 data[0].d32 = cpu_to_be32(AD5791_CMD_READ |
61 AD5791_ADDR(addr));
62 data[1].d32 = cpu_to_be32(AD5791_ADDR(AD5791_ADDR_NOOP));
63
64 spi_message_init(&msg);
65 spi_message_add_tail(&xfers[0], &msg);
66 spi_message_add_tail(&xfers[1], &msg);
67 ret = spi_sync(spi, &msg);
68
69 *val = be32_to_cpu(data[2].d32);
70
71 return ret;
72}
73
74static ssize_t ad5791_write_dac(struct device *dev,
75 struct device_attribute *attr,
76 const char *buf, size_t len)
77{
78 struct iio_dev *indio_dev = dev_get_drvdata(dev);
79 struct ad5791_state *st = iio_priv(indio_dev);
80 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
81 long readin;
82 int ret;
83
84 ret = strict_strtol(buf, 10, &readin);
85 if (ret)
86 return ret;
87
88 readin += (1 << (st->chip_info->bits - 1));
89 readin &= AD5791_RES_MASK(st->chip_info->bits);
90 readin <<= st->chip_info->left_shift;
91
92 ret = ad5791_spi_write(st->spi, this_attr->address, readin);
93 return ret ? ret : len;
94}
95
96static ssize_t ad5791_read_dac(struct device *dev,
97 struct device_attribute *attr,
98 char *buf)
99{
100 struct iio_dev *indio_dev = dev_get_drvdata(dev);
101 struct ad5791_state *st = iio_priv(indio_dev);
102 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
103 int ret;
104 int val;
105
106 ret = ad5791_spi_read(st->spi, this_attr->address, &val);
107 if (ret)
108 return ret;
109
110 val &= AD5791_DAC_MASK;
111 val >>= st->chip_info->left_shift;
112 val -= (1 << (st->chip_info->bits - 1));
113
114 return sprintf(buf, "%d\n", val);
115}
116
117static ssize_t ad5791_read_powerdown_mode(struct device *dev,
118 struct device_attribute *attr, char *buf)
119{
120 struct iio_dev *indio_dev = dev_get_drvdata(dev);
121 struct ad5791_state *st = iio_priv(indio_dev);
122
123 const char mode[][14] = {"6kohm_to_gnd", "three_state"};
124
125 return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
126}
127
128static ssize_t ad5791_write_powerdown_mode(struct device *dev,
129 struct device_attribute *attr,
130 const char *buf, size_t len)
131{
132 struct iio_dev *indio_dev = dev_get_drvdata(dev);
133 struct ad5791_state *st = iio_priv(indio_dev);
134 int ret;
135
136 if (sysfs_streq(buf, "6kohm_to_gnd"))
137 st->pwr_down_mode = AD5791_DAC_PWRDN_6K;
138 else if (sysfs_streq(buf, "three_state"))
139 st->pwr_down_mode = AD5791_DAC_PWRDN_3STATE;
140 else
141 ret = -EINVAL;
142
143 return ret ? ret : len;
144}
145
146static ssize_t ad5791_read_dac_powerdown(struct device *dev,
147 struct device_attribute *attr,
148 char *buf)
149{
150 struct iio_dev *indio_dev = dev_get_drvdata(dev);
151 struct ad5791_state *st = iio_priv(indio_dev);
152
153 return sprintf(buf, "%d\n", st->pwr_down);
154}
155
156static ssize_t ad5791_write_dac_powerdown(struct device *dev,
157 struct device_attribute *attr,
158 const char *buf, size_t len)
159{
160 long readin;
161 int ret;
162 struct iio_dev *indio_dev = dev_get_drvdata(dev);
163 struct ad5791_state *st = iio_priv(indio_dev);
164
165 ret = strict_strtol(buf, 10, &readin);
166 if (ret)
167 return ret;
168
169 if (readin == 0) {
170 st->pwr_down = false;
171 st->ctrl &= ~(AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI);
172 } else if (readin == 1) {
173 st->pwr_down = true;
174 if (st->pwr_down_mode == AD5791_DAC_PWRDN_6K)
175 st->ctrl |= AD5791_CTRL_OPGND;
176 else if (st->pwr_down_mode == AD5791_DAC_PWRDN_3STATE)
177 st->ctrl |= AD5791_CTRL_DACTRI;
178 } else
179 ret = -EINVAL;
180
181 ret = ad5791_spi_write(st->spi, AD5791_ADDR_CTRL, st->ctrl);
182
183 return ret ? ret : len;
184}
185
186static ssize_t ad5791_show_scale(struct device *dev,
187 struct device_attribute *attr,
188 char *buf)
189{
190 struct iio_dev *indio_dev = dev_get_drvdata(dev);
191 struct ad5791_state *st = iio_priv(indio_dev);
192 /* Corresponds to Vref / 2^(bits) */
193 unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
194
195 return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
196}
197static IIO_DEVICE_ATTR(out_scale, S_IRUGO, ad5791_show_scale, NULL, 0);
198
199static ssize_t ad5791_show_name(struct device *dev,
200 struct device_attribute *attr,
201 char *buf)
202{
203 struct iio_dev *indio_dev = dev_get_drvdata(dev);
204 struct ad5791_state *st = iio_priv(indio_dev);
205
206 return sprintf(buf, "%s\n", spi_get_device_id(st->spi)->name);
207}
208static IIO_DEVICE_ATTR(name, S_IRUGO, ad5791_show_name, NULL, 0);
209
210#define IIO_DEV_ATTR_OUT_RW_RAW(_num, _show, _store, _addr) \
211 IIO_DEVICE_ATTR(out##_num##_raw, \
212 S_IRUGO | S_IWUSR, _show, _store, _addr)
213
214static IIO_DEV_ATTR_OUT_RW_RAW(0, ad5791_read_dac,
215 ad5791_write_dac, AD5791_ADDR_DAC0);
216
217static IIO_DEVICE_ATTR(out_powerdown_mode, S_IRUGO |
218 S_IWUSR, ad5791_read_powerdown_mode,
219 ad5791_write_powerdown_mode, 0);
220
221static IIO_CONST_ATTR(out_powerdown_mode_available,
222 "6kohm_to_gnd three_state");
223
224#define IIO_DEV_ATTR_DAC_POWERDOWN(_num, _show, _store, _addr) \
225 IIO_DEVICE_ATTR(out##_num##_powerdown, \
226 S_IRUGO | S_IWUSR, _show, _store, _addr)
227
228static IIO_DEV_ATTR_DAC_POWERDOWN(0, ad5791_read_dac_powerdown,
229 ad5791_write_dac_powerdown, 0);
230
231static struct attribute *ad5791_attributes[] = {
232 &iio_dev_attr_out0_raw.dev_attr.attr,
233 &iio_dev_attr_out0_powerdown.dev_attr.attr,
234 &iio_dev_attr_out_powerdown_mode.dev_attr.attr,
235 &iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
236 &iio_dev_attr_out_scale.dev_attr.attr,
237 &iio_dev_attr_name.dev_attr.attr,
238 NULL,
239};
240
241static const struct attribute_group ad5791_attribute_group = {
242 .attrs = ad5791_attributes,
243};
244
245static int ad5791_get_lin_comp(unsigned int span)
246{
247 if (span <= 10000)
248 return AD5791_LINCOMP_0_10;
249 else if (span <= 12000)
250 return AD5791_LINCOMP_10_12;
251 else if (span <= 16000)
252 return AD5791_LINCOMP_12_16;
253 else if (span <= 19000)
254 return AD5791_LINCOMP_16_19;
255 else
256 return AD5791_LINCOMP_19_20;
257}
258
259static int ad5780_get_lin_comp(unsigned int span)
260{
261 if (span <= 10000)
262 return AD5780_LINCOMP_0_10;
263 else
264 return AD5780_LINCOMP_10_20;
265}
266
267static const struct ad5791_chip_info ad5791_chip_info_tbl[] = {
268 [ID_AD5760] = {
269 .bits = 16,
270 .left_shift = 4,
271 .get_lin_comp = ad5780_get_lin_comp,
272 },
273 [ID_AD5780] = {
274 .bits = 18,
275 .left_shift = 2,
276 .get_lin_comp = ad5780_get_lin_comp,
277 },
278 [ID_AD5781] = {
279 .bits = 18,
280 .left_shift = 2,
281 .get_lin_comp = ad5791_get_lin_comp,
282 },
283 [ID_AD5791] = {
284 .bits = 20,
285 .left_shift = 0,
286 .get_lin_comp = ad5791_get_lin_comp,
287 },
288};
289
290static const struct iio_info ad5791_info = {
291 .attrs = &ad5791_attribute_group,
292 .driver_module = THIS_MODULE,
293};
294
295static int __devinit ad5791_probe(struct spi_device *spi)
296{
297 struct ad5791_platform_data *pdata = spi->dev.platform_data;
298 struct iio_dev *indio_dev;
299 struct regulator *reg_vdd, *reg_vss;
300 struct ad5791_state *st;
301 int ret, pos_voltage_uv = 0, neg_voltage_uv = 0;
302
303 reg_vdd = regulator_get(&spi->dev, "vdd");
304 if (!IS_ERR(reg_vdd)) {
305 ret = regulator_enable(reg_vdd);
306 if (ret)
307 goto error_put_reg_pos;
308
309 pos_voltage_uv = regulator_get_voltage(reg_vdd);
310 }
311
312 reg_vss = regulator_get(&spi->dev, "vss");
313 if (!IS_ERR(reg_vss)) {
314 ret = regulator_enable(reg_vss);
315 if (ret)
316 goto error_put_reg_neg;
317
318 neg_voltage_uv = regulator_get_voltage(reg_vss);
319 }
320
321 indio_dev = iio_allocate_device(sizeof(*st));
322 if (indio_dev == NULL) {
323 ret = -ENOMEM;
324 goto error_disable_reg_neg;
325 }
326 st = iio_priv(indio_dev);
327 st->pwr_down = true;
328 st->spi = spi;
329
330 if (!IS_ERR(reg_vss) && !IS_ERR(reg_vdd))
331 st->vref_mv = (pos_voltage_uv - neg_voltage_uv) / 1000;
332 else if (pdata)
333 st->vref_mv = pdata->vref_pos_mv - pdata->vref_neg_mv;
334 else
335 dev_warn(&spi->dev, "reference voltage unspecified\n");
336
337 ret = ad5791_spi_write(spi, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET);
338 if (ret)
339 goto error_free_dev;
340
341 st->chip_info =
342 &ad5791_chip_info_tbl[spi_get_device_id(spi)->driver_data];
343
344
345 st->ctrl = AD5761_CTRL_LINCOMP(st->chip_info->get_lin_comp(st->vref_mv))
346 | ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) |
347 AD5791_CTRL_BIN2SC;
348
349 ret = ad5791_spi_write(spi, AD5791_ADDR_CTRL, st->ctrl |
350 AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI);
351 if (ret)
352 goto error_free_dev;
353
354 st->reg_vdd = reg_vdd;
355 st->reg_vss = reg_vss;
356
357 spi_set_drvdata(spi, indio_dev);
358 indio_dev->dev.parent = &spi->dev;
359 indio_dev->info = &ad5791_info;
360 indio_dev->modes = INDIO_DIRECT_MODE;
361
362 ret = iio_device_register(indio_dev);
363 if (ret)
364 goto error_free_dev;
365
366 return 0;
367
368error_free_dev:
369 iio_free_device(indio_dev);
370
371error_disable_reg_neg:
372 if (!IS_ERR(reg_vss))
373 regulator_disable(reg_vss);
374error_put_reg_neg:
375 if (!IS_ERR(reg_vss))
376 regulator_put(reg_vss);
377
378 if (!IS_ERR(reg_vdd))
379 regulator_disable(reg_vdd);
380error_put_reg_pos:
381 if (!IS_ERR(reg_vdd))
382 regulator_put(reg_vdd);
383
384error_ret:
385 return ret;
386}
387
388static int __devexit ad5791_remove(struct spi_device *spi)
389{
390 struct iio_dev *indio_dev = spi_get_drvdata(spi);
391 struct ad5791_state *st = iio_priv(indio_dev);
392 struct regulator *reg_vdd = st->reg_vdd;
393 struct regulator *reg_vss = st->reg_vss;
394
395 iio_device_unregister(indio_dev);
396
397 if (!IS_ERR(st->reg_vdd)) {
398 regulator_disable(reg_vdd);
399 regulator_put(reg_vdd);
400 }
401
402 if (!IS_ERR(st->reg_vss)) {
403 regulator_disable(reg_vss);
404 regulator_put(reg_vss);
405 }
406
407 return 0;
408}
409
410static const struct spi_device_id ad5791_id[] = {
411 {"ad5760", ID_AD5760},
412 {"ad5780", ID_AD5780},
413 {"ad5781", ID_AD5781},
414 {"ad5791", ID_AD5791},
415 {}
416};
417
418static struct spi_driver ad5791_driver = {
419 .driver = {
420 .name = "ad5791",
421 .owner = THIS_MODULE,
422 },
423 .probe = ad5791_probe,
424 .remove = __devexit_p(ad5791_remove),
425 .id_table = ad5791_id,
426};
427
428static __init int ad5791_spi_init(void)
429{
430 return spi_register_driver(&ad5791_driver);
431}
432module_init(ad5791_spi_init);
433
434static __exit void ad5791_spi_exit(void)
435{
436 spi_unregister_driver(&ad5791_driver);
437}
438module_exit(ad5791_spi_exit);
439
440MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
441MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5791 DAC");
442MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5791.h b/drivers/staging/iio/dac/ad5791.h
new file mode 100644
index 00000000000..c807f26539d
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5791.h
@@ -0,0 +1,114 @@
1/*
2 * AD5791 SPI DAC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#ifndef SPI_AD5791_H_
10#define SPI_AD5791_H_
11
12#define AD5791_RES_MASK(x) ((1 << (x)) - 1)
13#define AD5791_DAC_MASK AD5791_RES_MASK(20)
14#define AD5791_DAC_MSB (1 << 19)
15
16#define AD5791_CMD_READ (1 << 23)
17#define AD5791_CMD_WRITE (0 << 23)
18#define AD5791_ADDR(addr) ((addr) << 20)
19
20/* Registers */
21#define AD5791_ADDR_NOOP 0
22#define AD5791_ADDR_DAC0 1
23#define AD5791_ADDR_CTRL 2
24#define AD5791_ADDR_CLRCODE 3
25#define AD5791_ADDR_SW_CTRL 4
26
27/* Control Register */
28#define AD5791_CTRL_RBUF (1 << 1)
29#define AD5791_CTRL_OPGND (1 << 2)
30#define AD5791_CTRL_DACTRI (1 << 3)
31#define AD5791_CTRL_BIN2SC (1 << 4)
32#define AD5791_CTRL_SDODIS (1 << 5)
33#define AD5761_CTRL_LINCOMP(x) ((x) << 6)
34
35#define AD5791_LINCOMP_0_10 0
36#define AD5791_LINCOMP_10_12 1
37#define AD5791_LINCOMP_12_16 2
38#define AD5791_LINCOMP_16_19 3
39#define AD5791_LINCOMP_19_20 12
40
41#define AD5780_LINCOMP_0_10 0
42#define AD5780_LINCOMP_10_20 12
43
44/* Software Control Register */
45#define AD5791_SWCTRL_LDAC (1 << 0)
46#define AD5791_SWCTRL_CLR (1 << 1)
47#define AD5791_SWCTRL_RESET (1 << 2)
48
49#define AD5791_DAC_PWRDN_6K 0
50#define AD5791_DAC_PWRDN_3STATE 1
51
52/*
53 * TODO: struct ad5791_platform_data needs to go into include/linux/iio
54 */
55
56/**
57 * struct ad5791_platform_data - platform specific information
58 * @vref_pos_mv: Vdd Positive Analog Supply Volatge (mV)
59 * @vref_neg_mv: Vdd Negative Analog Supply Volatge (mV)
60 * @use_rbuf_gain2: ext. amplifier connected in gain of two configuration
61 */
62
63struct ad5791_platform_data {
64 u16 vref_pos_mv;
65 u16 vref_neg_mv;
66 bool use_rbuf_gain2;
67};
68
69/**
70 * struct ad5791_chip_info - chip specific information
71 * @bits: accuracy of the DAC in bits
72 * @left_shift: number of bits the datum must be shifted
73 * @get_lin_comp: function pointer to the device specific function
74 */
75
76struct ad5791_chip_info {
77 u8 bits;
78 u8 left_shift;
79 int (*get_lin_comp) (unsigned int span);
80};
81
82/**
83 * struct ad5791_state - driver instance specific data
84 * @us: spi_device
85 * @reg_vdd: positive supply regulator
86 * @reg_vss: negative supply regulator
87 * @chip_info: chip model specific constants
88 * @vref_mv: actual reference voltage used
89 * @pwr_down_mode current power down mode
90 */
91
92struct ad5791_state {
93 struct spi_device *spi;
94 struct regulator *reg_vdd;
95 struct regulator *reg_vss;
96 const struct ad5791_chip_info *chip_info;
97 unsigned short vref_mv;
98 unsigned ctrl;
99 unsigned pwr_down_mode;
100 bool pwr_down;
101};
102
103/**
104 * ad5791_supported_device_ids:
105 */
106
107enum ad5791_supported_device_ids {
108 ID_AD5760,
109 ID_AD5780,
110 ID_AD5781,
111 ID_AD5791,
112};
113
114#endif /* SPI_AD5791_H_ */
diff --git a/drivers/staging/iio/dac/dac.h b/drivers/staging/iio/dac/dac.h
new file mode 100644
index 00000000000..1d82f353241
--- /dev/null
+++ b/drivers/staging/iio/dac/dac.h
@@ -0,0 +1,6 @@
1/*
2 * dac.h - sysfs attributes associated with DACs
3 */
4
5#define IIO_DEV_ATTR_OUT_RAW(_num, _store, _addr) \
6 IIO_DEVICE_ATTR(out##_num##_raw, S_IWUSR, NULL, _store, _addr)
diff --git a/drivers/staging/iio/dac/max517.c b/drivers/staging/iio/dac/max517.c
new file mode 100644
index 00000000000..ed5d351b238
--- /dev/null
+++ b/drivers/staging/iio/dac/max517.c
@@ -0,0 +1,295 @@
1/*
2 * max517.c - Support for Maxim MAX517, MAX518 and MAX519
3 *
4 * Copyright (C) 2010, 2011 Roland Stigge <stigge@antcom.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/slab.h>
24#include <linux/jiffies.h>
25#include <linux/i2c.h>
26#include <linux/err.h>
27
28#include "../iio.h"
29#include "dac.h"
30
31#include "max517.h"
32
33#define MAX517_DRV_NAME "max517"
34
35/* Commands */
36#define COMMAND_CHANNEL0 0x00
37#define COMMAND_CHANNEL1 0x01 /* for MAX518 and MAX519 */
38#define COMMAND_PD 0x08 /* Power Down */
39
40enum max517_device_ids {
41 ID_MAX517,
42 ID_MAX518,
43 ID_MAX519,
44};
45
46struct max517_data {
47 struct iio_dev *indio_dev;
48 struct i2c_client *client;
49 unsigned short vref_mv[2];
50};
51
52/*
53 * channel: bit 0: channel 1
54 * bit 1: channel 2
55 * (this way, it's possible to set both channels at once)
56 */
57static ssize_t max517_set_value(struct device *dev,
58 struct device_attribute *attr,
59 const char *buf, size_t count, int channel)
60{
61 struct iio_dev *dev_info = dev_get_drvdata(dev);
62 struct max517_data *data = iio_priv(dev_info);
63 struct i2c_client *client = data->client;
64 u8 outbuf[4]; /* 1x or 2x command + value */
65 int outbuf_size = 0;
66 int res;
67 long val;
68
69 res = strict_strtol(buf, 10, &val);
70
71 if (res)
72 return res;
73
74 if (val < 0 || val > 255)
75 return -EINVAL;
76
77 if (channel & 1) {
78 outbuf[outbuf_size++] = COMMAND_CHANNEL0;
79 outbuf[outbuf_size++] = val;
80 }
81 if (channel & 2) {
82 outbuf[outbuf_size++] = COMMAND_CHANNEL1;
83 outbuf[outbuf_size++] = val;
84 }
85
86 /*
87 * At this point, there are always 1 or 2 two-byte commands in
88 * outbuf. With 2 commands, the device can set two outputs
89 * simultaneously, latching the values upon the end of the I2C
90 * transfer.
91 */
92
93 res = i2c_master_send(client, outbuf, outbuf_size);
94 if (res < 0)
95 return res;
96
97 return count;
98}
99
100static ssize_t max517_set_value_1(struct device *dev,
101 struct device_attribute *attr,
102 const char *buf, size_t count)
103{
104 return max517_set_value(dev, attr, buf, count, 1);
105}
106static IIO_DEV_ATTR_OUT_RAW(1, max517_set_value_1, 0);
107
108static ssize_t max517_set_value_2(struct device *dev,
109 struct device_attribute *attr,
110 const char *buf, size_t count)
111{
112 return max517_set_value(dev, attr, buf, count, 2);
113}
114static IIO_DEV_ATTR_OUT_RAW(2, max517_set_value_2, 1);
115
116static ssize_t max517_set_value_both(struct device *dev,
117 struct device_attribute *attr,
118 const char *buf, size_t count)
119{
120 return max517_set_value(dev, attr, buf, count, 3);
121}
122static IIO_DEVICE_ATTR_NAMED(out1and2_raw, out1&2_raw, S_IWUSR, NULL,
123 max517_set_value_both, -1);
124
125static ssize_t max517_show_scale(struct device *dev,
126 struct device_attribute *attr,
127 char *buf, int channel)
128{
129 struct iio_dev *dev_info = dev_get_drvdata(dev);
130 struct max517_data *data = iio_priv(dev_info);
131 /* Corresponds to Vref / 2^(bits) */
132 unsigned int scale_uv = (data->vref_mv[channel - 1] * 1000) >> 8;
133
134 return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
135}
136
137static ssize_t max517_show_scale1(struct device *dev,
138 struct device_attribute *attr,
139 char *buf)
140{
141 return max517_show_scale(dev, attr, buf, 1);
142}
143static IIO_DEVICE_ATTR(out1_scale, S_IRUGO, max517_show_scale1, NULL, 0);
144
145static ssize_t max517_show_scale2(struct device *dev,
146 struct device_attribute *attr,
147 char *buf)
148{
149 return max517_show_scale(dev, attr, buf, 2);
150}
151static IIO_DEVICE_ATTR(out2_scale, S_IRUGO, max517_show_scale2, NULL, 0);
152
153/* On MAX517 variant, we have one output */
154static struct attribute *max517_attributes[] = {
155 &iio_dev_attr_out1_raw.dev_attr.attr,
156 &iio_dev_attr_out1_scale.dev_attr.attr,
157 NULL
158};
159
160static struct attribute_group max517_attribute_group = {
161 .attrs = max517_attributes,
162};
163
164/* On MAX518 and MAX519 variant, we have two outputs */
165static struct attribute *max518_attributes[] = {
166 &iio_dev_attr_out1_raw.dev_attr.attr,
167 &iio_dev_attr_out1_scale.dev_attr.attr,
168 &iio_dev_attr_out2_raw.dev_attr.attr,
169 &iio_dev_attr_out2_scale.dev_attr.attr,
170 &iio_dev_attr_out1and2_raw.dev_attr.attr,
171 NULL
172};
173
174static struct attribute_group max518_attribute_group = {
175 .attrs = max518_attributes,
176};
177
178static int max517_suspend(struct i2c_client *client, pm_message_t mesg)
179{
180 u8 outbuf = COMMAND_PD;
181
182 return i2c_master_send(client, &outbuf, 1);
183}
184
185static int max517_resume(struct i2c_client *client)
186{
187 u8 outbuf = 0;
188
189 return i2c_master_send(client, &outbuf, 1);
190}
191
192static const struct iio_info max517_info = {
193 .attrs = &max517_attribute_group,
194 .driver_module = THIS_MODULE,
195};
196
197static const struct iio_info max518_info = {
198 .attrs = &max518_attribute_group,
199 .driver_module = THIS_MODULE,
200};
201
202static int max517_probe(struct i2c_client *client,
203 const struct i2c_device_id *id)
204{
205 struct max517_data *data;
206 struct iio_dev *indio_dev;
207 struct max517_platform_data *platform_data = client->dev.platform_data;
208 int err;
209
210 indio_dev = iio_allocate_device(sizeof(*data));
211 if (indio_dev == NULL) {
212 err = -ENOMEM;
213 goto exit;
214 }
215 data = iio_priv(indio_dev);
216 i2c_set_clientdata(client, indio_dev);
217 data->client = client;
218
219 /* establish that the iio_dev is a child of the i2c device */
220 indio_dev->dev.parent = &client->dev;
221
222 /* reduced attribute set for MAX517 */
223 if (id->driver_data == ID_MAX517)
224 indio_dev->info = &max517_info;
225 else
226 indio_dev->info = &max518_info;
227 indio_dev->modes = INDIO_DIRECT_MODE;
228
229 /*
230 * Reference voltage on MAX518 and default is 5V, else take vref_mv
231 * from platform_data
232 */
233 if (id->driver_data == ID_MAX518 || !platform_data) {
234 data->vref_mv[0] = data->vref_mv[1] = 5000; /* mV */
235 } else {
236 data->vref_mv[0] = platform_data->vref_mv[0];
237 data->vref_mv[1] = platform_data->vref_mv[1];
238 }
239
240 err = iio_device_register(indio_dev);
241 if (err)
242 goto exit_free_device;
243
244 dev_info(&client->dev, "DAC registered\n");
245
246 return 0;
247
248exit_free_device:
249 iio_free_device(indio_dev);
250exit:
251 return err;
252}
253
254static int max517_remove(struct i2c_client *client)
255{
256 iio_free_device(i2c_get_clientdata(client));
257
258 return 0;
259}
260
261static const struct i2c_device_id max517_id[] = {
262 { "max517", ID_MAX517 },
263 { "max518", ID_MAX518 },
264 { "max519", ID_MAX519 },
265 { }
266};
267MODULE_DEVICE_TABLE(i2c, max517_id);
268
269static struct i2c_driver max517_driver = {
270 .driver = {
271 .name = MAX517_DRV_NAME,
272 },
273 .probe = max517_probe,
274 .remove = max517_remove,
275 .suspend = max517_suspend,
276 .resume = max517_resume,
277 .id_table = max517_id,
278};
279
280static int __init max517_init(void)
281{
282 return i2c_add_driver(&max517_driver);
283}
284
285static void __exit max517_exit(void)
286{
287 i2c_del_driver(&max517_driver);
288}
289
290MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
291MODULE_DESCRIPTION("MAX517/MAX518/MAX519 8-bit DAC");
292MODULE_LICENSE("GPL");
293
294module_init(max517_init);
295module_exit(max517_exit);
diff --git a/drivers/staging/iio/dac/max517.h b/drivers/staging/iio/dac/max517.h
new file mode 100644
index 00000000000..8106cf24642
--- /dev/null
+++ b/drivers/staging/iio/dac/max517.h
@@ -0,0 +1,19 @@
1/*
2 * MAX517 DAC driver
3 *
4 * Copyright 2011 Roland Stigge <stigge@antcom.de>
5 *
6 * Licensed under the GPL-2 or later.
7 */
8#ifndef IIO_DAC_MAX517_H_
9#define IIO_DAC_MAX517_H_
10
11/*
12 * TODO: struct max517_platform_data needs to go into include/linux/iio
13 */
14
15struct max517_platform_data {
16 u16 vref_mv[2];
17};
18
19#endif /* IIO_DAC_MAX517_H_ */
diff --git a/drivers/staging/iio/dds/Kconfig b/drivers/staging/iio/dds/Kconfig
new file mode 100644
index 00000000000..e07431d8009
--- /dev/null
+++ b/drivers/staging/iio/dds/Kconfig
@@ -0,0 +1,59 @@
1#
2# Direct Digital Synthesis drivers
3#
4comment "Direct Digital Synthesis"
5
6config AD5930
7 tristate "Analog Devices ad5930/5932 driver"
8 depends on SPI
9 help
10 Say yes here to build support for Analog Devices DDS chip
11 ad5930/ad5932, provides direct access via sysfs.
12
13config AD9832
14 tristate "Analog Devices ad9832/5 driver"
15 depends on SPI
16 help
17 Say yes here to build support for Analog Devices DDS chip
18 AD9832 and AD9835, provides direct access via sysfs.
19
20 To compile this driver as a module, choose M here: the
21 module will be called ad9832.
22
23config AD9834
24 tristate "Analog Devices AD9833/4/7/8 driver"
25 depends on SPI
26 help
27 Say yes here to build support for Analog Devices DDS chip
28 AD9833, AD9834, AD9837 and AD9838, provides direct access via sysfs.
29
30 To compile this driver as a module, choose M here: the
31 module will be called ad9834.
32
33config AD9850
34 tristate "Analog Devices ad9850/1 driver"
35 depends on SPI
36 help
37 Say yes here to build support for Analog Devices DDS chip
38 ad9850/1, provides direct access via sysfs.
39
40config AD9852
41 tristate "Analog Devices ad9852/4 driver"
42 depends on SPI
43 help
44 Say yes here to build support for Analog Devices DDS chip
45 ad9852/4, provides direct access via sysfs.
46
47config AD9910
48 tristate "Analog Devices ad9910 driver"
49 depends on SPI
50 help
51 Say yes here to build support for Analog Devices DDS chip
52 ad9910, provides direct access via sysfs.
53
54config AD9951
55 tristate "Analog Devices ad9951 driver"
56 depends on SPI
57 help
58 Say yes here to build support for Analog Devices DDS chip
59 ad9951, provides direct access via sysfs.
diff --git a/drivers/staging/iio/dds/Makefile b/drivers/staging/iio/dds/Makefile
new file mode 100644
index 00000000000..147746176b9
--- /dev/null
+++ b/drivers/staging/iio/dds/Makefile
@@ -0,0 +1,11 @@
1#
2# Makefile for Direct Digital Synthesis drivers
3#
4
5obj-$(CONFIG_AD5930) += ad5930.o
6obj-$(CONFIG_AD9832) += ad9832.o
7obj-$(CONFIG_AD9834) += ad9834.o
8obj-$(CONFIG_AD9850) += ad9850.o
9obj-$(CONFIG_AD9852) += ad9852.o
10obj-$(CONFIG_AD9910) += ad9910.o
11obj-$(CONFIG_AD9951) += ad9951.o
diff --git a/drivers/staging/iio/dds/ad5930.c b/drivers/staging/iio/dds/ad5930.c
new file mode 100644
index 00000000000..0b2aa4cafdd
--- /dev/null
+++ b/drivers/staging/iio/dds/ad5930.c
@@ -0,0 +1,159 @@
1/*
2 * Driver for ADI Direct Digital Synthesis ad5930
3 *
4 * Copyright (c) 2010-2010 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#include <linux/types.h>
12#include <linux/mutex.h>
13#include <linux/device.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20
21#define DRV_NAME "ad5930"
22
23#define value_mask (u16)0xf000
24#define addr_shift 12
25
26/* Register format: 4 bits addr + 12 bits value */
27struct ad5903_config {
28 u16 control;
29 u16 incnum;
30 u16 frqdelt[2];
31 u16 incitvl;
32 u16 buritvl;
33 u16 strtfrq[2];
34};
35
36struct ad5930_state {
37 struct mutex lock;
38 struct spi_device *sdev;
39};
40
41static ssize_t ad5930_set_parameter(struct device *dev,
42 struct device_attribute *attr,
43 const char *buf,
44 size_t len)
45{
46 struct spi_message msg;
47 struct spi_transfer xfer;
48 int ret;
49 struct ad5903_config *config = (struct ad5903_config *)buf;
50 struct iio_dev *idev = dev_get_drvdata(dev);
51 struct ad5930_state *st = iio_priv(idev);
52
53 config->control = (config->control & ~value_mask);
54 config->incnum = (config->control & ~value_mask) | (1 << addr_shift);
55 config->frqdelt[0] = (config->control & ~value_mask) | (2 << addr_shift);
56 config->frqdelt[1] = (config->control & ~value_mask) | 3 << addr_shift;
57 config->incitvl = (config->control & ~value_mask) | 4 << addr_shift;
58 config->buritvl = (config->control & ~value_mask) | 8 << addr_shift;
59 config->strtfrq[0] = (config->control & ~value_mask) | 0xc << addr_shift;
60 config->strtfrq[1] = (config->control & ~value_mask) | 0xd << addr_shift;
61
62 xfer.len = len;
63 xfer.tx_buf = config;
64 mutex_lock(&st->lock);
65
66 spi_message_init(&msg);
67 spi_message_add_tail(&xfer, &msg);
68 ret = spi_sync(st->sdev, &msg);
69 if (ret)
70 goto error_ret;
71error_ret:
72 mutex_unlock(&st->lock);
73
74 return ret ? ret : len;
75}
76
77static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad5930_set_parameter, 0);
78
79static struct attribute *ad5930_attributes[] = {
80 &iio_dev_attr_dds.dev_attr.attr,
81 NULL,
82};
83
84static const struct attribute_group ad5930_attribute_group = {
85 .attrs = ad5930_attributes,
86};
87
88static const struct iio_info ad5930_info = {
89 .attrs = &ad5930_attribute_group,
90 .driver_module = THIS_MODULE,
91};
92
93static int __devinit ad5930_probe(struct spi_device *spi)
94{
95 struct ad5930_state *st;
96 struct iio_dev *idev;
97 int ret = 0;
98
99 idev = iio_allocate_device(sizeof(*st));
100 if (idev == NULL) {
101 ret = -ENOMEM;
102 goto error_ret;
103 }
104 spi_set_drvdata(spi, idev);
105 st = iio_priv(idev);
106
107 mutex_init(&st->lock);
108 st->sdev = spi;
109 idev->dev.parent = &spi->dev;
110 idev->info = &ad5930_info;
111 idev->modes = INDIO_DIRECT_MODE;
112
113 ret = iio_device_register(idev);
114 if (ret)
115 goto error_free_dev;
116 spi->max_speed_hz = 2000000;
117 spi->mode = SPI_MODE_3;
118 spi->bits_per_word = 16;
119 spi_setup(spi);
120
121 return 0;
122
123error_free_dev:
124 iio_free_device(idev);
125error_ret:
126 return ret;
127}
128
129static int __devexit ad5930_remove(struct spi_device *spi)
130{
131 iio_device_unregister(spi_get_drvdata(spi));
132
133 return 0;
134}
135
136static struct spi_driver ad5930_driver = {
137 .driver = {
138 .name = DRV_NAME,
139 .owner = THIS_MODULE,
140 },
141 .probe = ad5930_probe,
142 .remove = __devexit_p(ad5930_remove),
143};
144
145static __init int ad5930_spi_init(void)
146{
147 return spi_register_driver(&ad5930_driver);
148}
149module_init(ad5930_spi_init);
150
151static __exit void ad5930_spi_exit(void)
152{
153 spi_unregister_driver(&ad5930_driver);
154}
155module_exit(ad5930_spi_exit);
156
157MODULE_AUTHOR("Cliff Cai");
158MODULE_DESCRIPTION("Analog Devices ad5930 driver");
159MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dds/ad9832.c b/drivers/staging/iio/dds/ad9832.c
new file mode 100644
index 00000000000..e3e61a469bb
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9832.c
@@ -0,0 +1,372 @@
1/*
2 * AD9832 SPI DDS driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/device.h>
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/sysfs.h>
13#include <linux/spi/spi.h>
14#include <linux/regulator/consumer.h>
15#include <linux/err.h>
16#include <asm/div64.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20#include "dds.h"
21
22#include "ad9832.h"
23
24static unsigned long ad9832_calc_freqreg(unsigned long mclk, unsigned long fout)
25{
26 unsigned long long freqreg = (u64) fout *
27 (u64) ((u64) 1L << AD9832_FREQ_BITS);
28 do_div(freqreg, mclk);
29 return freqreg;
30}
31
32static int ad9832_write_frequency(struct ad9832_state *st,
33 unsigned addr, unsigned long fout)
34{
35 unsigned long regval;
36
37 if (fout > (st->mclk / 2))
38 return -EINVAL;
39
40 regval = ad9832_calc_freqreg(st->mclk, fout);
41
42 st->freq_data[0] = cpu_to_be16((AD9832_CMD_FRE8BITSW << CMD_SHIFT) |
43 (addr << ADD_SHIFT) |
44 ((regval >> 24) & 0xFF));
45 st->freq_data[1] = cpu_to_be16((AD9832_CMD_FRE16BITSW << CMD_SHIFT) |
46 ((addr - 1) << ADD_SHIFT) |
47 ((regval >> 16) & 0xFF));
48 st->freq_data[2] = cpu_to_be16((AD9832_CMD_FRE8BITSW << CMD_SHIFT) |
49 ((addr - 2) << ADD_SHIFT) |
50 ((regval >> 8) & 0xFF));
51 st->freq_data[3] = cpu_to_be16((AD9832_CMD_FRE16BITSW << CMD_SHIFT) |
52 ((addr - 3) << ADD_SHIFT) |
53 ((regval >> 0) & 0xFF));
54
55 return spi_sync(st->spi, &st->freq_msg);;
56}
57
58static int ad9832_write_phase(struct ad9832_state *st,
59 unsigned long addr, unsigned long phase)
60{
61 if (phase > (1 << AD9832_PHASE_BITS))
62 return -EINVAL;
63
64 st->phase_data[0] = cpu_to_be16((AD9832_CMD_PHA8BITSW << CMD_SHIFT) |
65 (addr << ADD_SHIFT) |
66 ((phase >> 8) & 0xFF));
67 st->phase_data[1] = cpu_to_be16((AD9832_CMD_PHA16BITSW << CMD_SHIFT) |
68 ((addr - 1) << ADD_SHIFT) |
69 (phase & 0xFF));
70
71 return spi_sync(st->spi, &st->phase_msg);
72}
73
74static ssize_t ad9832_write(struct device *dev,
75 struct device_attribute *attr,
76 const char *buf,
77 size_t len)
78{
79 struct iio_dev *dev_info = dev_get_drvdata(dev);
80 struct ad9832_state *st = iio_priv(dev_info);
81 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
82 int ret;
83 long val;
84
85 ret = strict_strtoul(buf, 10, &val);
86 if (ret)
87 goto error_ret;
88
89 mutex_lock(&dev_info->mlock);
90 switch (this_attr->address) {
91 case AD9832_FREQ0HM:
92 case AD9832_FREQ1HM:
93 ret = ad9832_write_frequency(st, this_attr->address, val);
94 break;
95 case AD9832_PHASE0H:
96 case AD9832_PHASE1H:
97 case AD9832_PHASE2H:
98 case AD9832_PHASE3H:
99 ret = ad9832_write_phase(st, this_attr->address, val);
100 break;
101 case AD9832_PINCTRL_EN:
102 if (val)
103 st->ctrl_ss &= ~AD9832_SELSRC;
104 else
105 st->ctrl_ss |= AD9832_SELSRC;
106 st->data = cpu_to_be16((AD9832_CMD_SYNCSELSRC << CMD_SHIFT) |
107 st->ctrl_ss);
108 ret = spi_sync(st->spi, &st->msg);
109 break;
110 case AD9832_FREQ_SYM:
111 if (val == 1)
112 st->ctrl_fp |= AD9832_FREQ;
113 else if (val == 0)
114 st->ctrl_fp &= ~AD9832_FREQ;
115 else {
116 ret = -EINVAL;
117 break;
118 }
119 st->data = cpu_to_be16((AD9832_CMD_FPSELECT << CMD_SHIFT) |
120 st->ctrl_fp);
121 ret = spi_sync(st->spi, &st->msg);
122 break;
123 case AD9832_PHASE_SYM:
124 if (val < 0 || val > 3) {
125 ret = -EINVAL;
126 break;
127 }
128
129 st->ctrl_fp &= ~AD9832_PHASE(3);
130 st->ctrl_fp |= AD9832_PHASE(val);
131
132 st->data = cpu_to_be16((AD9832_CMD_FPSELECT << CMD_SHIFT) |
133 st->ctrl_fp);
134 ret = spi_sync(st->spi, &st->msg);
135 break;
136 case AD9832_OUTPUT_EN:
137 if (val)
138 st->ctrl_src &= ~(AD9832_RESET | AD9832_SLEEP |
139 AD9832_CLR);
140 else
141 st->ctrl_src |= AD9832_RESET;
142
143 st->data = cpu_to_be16((AD9832_CMD_SLEEPRESCLR << CMD_SHIFT) |
144 st->ctrl_src);
145 ret = spi_sync(st->spi, &st->msg);
146 break;
147 default:
148 ret = -ENODEV;
149 }
150 mutex_unlock(&dev_info->mlock);
151
152error_ret:
153 return ret ? ret : len;
154}
155
156/**
157 * see dds.h for further information
158 */
159
160static IIO_DEV_ATTR_FREQ(0, 0, S_IWUSR, NULL, ad9832_write, AD9832_FREQ0HM);
161static IIO_DEV_ATTR_FREQ(0, 1, S_IWUSR, NULL, ad9832_write, AD9832_FREQ1HM);
162static IIO_DEV_ATTR_FREQSYMBOL(0, S_IWUSR, NULL, ad9832_write, AD9832_FREQ_SYM);
163static IIO_CONST_ATTR_FREQ_SCALE(0, "1"); /* 1Hz */
164
165static IIO_DEV_ATTR_PHASE(0, 0, S_IWUSR, NULL, ad9832_write, AD9832_PHASE0H);
166static IIO_DEV_ATTR_PHASE(0, 1, S_IWUSR, NULL, ad9832_write, AD9832_PHASE1H);
167static IIO_DEV_ATTR_PHASE(0, 2, S_IWUSR, NULL, ad9832_write, AD9832_PHASE2H);
168static IIO_DEV_ATTR_PHASE(0, 3, S_IWUSR, NULL, ad9832_write, AD9832_PHASE3H);
169static IIO_DEV_ATTR_PHASESYMBOL(0, S_IWUSR, NULL,
170 ad9832_write, AD9832_PHASE_SYM);
171static IIO_CONST_ATTR_PHASE_SCALE(0, "0.0015339808"); /* 2PI/2^12 rad*/
172
173static IIO_DEV_ATTR_PINCONTROL_EN(0, S_IWUSR, NULL,
174 ad9832_write, AD9832_PINCTRL_EN);
175static IIO_DEV_ATTR_OUT_ENABLE(0, S_IWUSR, NULL,
176 ad9832_write, AD9832_OUTPUT_EN);
177
178static struct attribute *ad9832_attributes[] = {
179 &iio_dev_attr_dds0_freq0.dev_attr.attr,
180 &iio_dev_attr_dds0_freq1.dev_attr.attr,
181 &iio_const_attr_dds0_freq_scale.dev_attr.attr,
182 &iio_dev_attr_dds0_phase0.dev_attr.attr,
183 &iio_dev_attr_dds0_phase1.dev_attr.attr,
184 &iio_dev_attr_dds0_phase2.dev_attr.attr,
185 &iio_dev_attr_dds0_phase3.dev_attr.attr,
186 &iio_const_attr_dds0_phase_scale.dev_attr.attr,
187 &iio_dev_attr_dds0_pincontrol_en.dev_attr.attr,
188 &iio_dev_attr_dds0_freqsymbol.dev_attr.attr,
189 &iio_dev_attr_dds0_phasesymbol.dev_attr.attr,
190 &iio_dev_attr_dds0_out_enable.dev_attr.attr,
191 NULL,
192};
193
194static const struct attribute_group ad9832_attribute_group = {
195 .attrs = ad9832_attributes,
196};
197
198static const struct iio_info ad9832_info = {
199 .attrs = &ad9832_attribute_group,
200 .driver_module = THIS_MODULE,
201};
202
203static int __devinit ad9832_probe(struct spi_device *spi)
204{
205 struct ad9832_platform_data *pdata = spi->dev.platform_data;
206 struct iio_dev *indio_dev;
207 struct ad9832_state *st;
208 struct regulator *reg;
209 int ret;
210
211 if (!pdata) {
212 dev_dbg(&spi->dev, "no platform data?\n");
213 return -ENODEV;
214 }
215
216 reg = regulator_get(&spi->dev, "vcc");
217 if (!IS_ERR(reg)) {
218 ret = regulator_enable(reg);
219 if (ret)
220 goto error_put_reg;
221 }
222
223 indio_dev = iio_allocate_device(sizeof(*st));
224 if (indio_dev == NULL) {
225 ret = -ENOMEM;
226 goto error_disable_reg;
227 }
228 spi_set_drvdata(spi, indio_dev);
229 st = iio_priv(indio_dev);
230 st->reg = reg;
231 st->mclk = pdata->mclk;
232 st->spi = spi;
233
234 indio_dev->dev.parent = &spi->dev;
235 indio_dev->name = spi_get_device_id(spi)->name;
236 indio_dev->info = &ad9832_info;
237 indio_dev->modes = INDIO_DIRECT_MODE;
238
239 /* Setup default messages */
240
241 st->xfer.tx_buf = &st->data;
242 st->xfer.len = 2;
243
244 spi_message_init(&st->msg);
245 spi_message_add_tail(&st->xfer, &st->msg);
246
247 st->freq_xfer[0].tx_buf = &st->freq_data[0];
248 st->freq_xfer[0].len = 2;
249 st->freq_xfer[0].cs_change = 1;
250 st->freq_xfer[1].tx_buf = &st->freq_data[1];
251 st->freq_xfer[1].len = 2;
252 st->freq_xfer[1].cs_change = 1;
253 st->freq_xfer[2].tx_buf = &st->freq_data[2];
254 st->freq_xfer[2].len = 2;
255 st->freq_xfer[2].cs_change = 1;
256 st->freq_xfer[3].tx_buf = &st->freq_data[3];
257 st->freq_xfer[3].len = 2;
258
259 spi_message_init(&st->freq_msg);
260 spi_message_add_tail(&st->freq_xfer[0], &st->freq_msg);
261 spi_message_add_tail(&st->freq_xfer[1], &st->freq_msg);
262 spi_message_add_tail(&st->freq_xfer[2], &st->freq_msg);
263 spi_message_add_tail(&st->freq_xfer[3], &st->freq_msg);
264
265 st->phase_xfer[0].tx_buf = &st->phase_data[0];
266 st->phase_xfer[0].len = 2;
267 st->phase_xfer[0].cs_change = 1;
268 st->phase_xfer[1].tx_buf = &st->phase_data[1];
269 st->phase_xfer[1].len = 2;
270
271 spi_message_init(&st->phase_msg);
272 spi_message_add_tail(&st->phase_xfer[0], &st->phase_msg);
273 spi_message_add_tail(&st->phase_xfer[1], &st->phase_msg);
274
275 st->ctrl_src = AD9832_SLEEP | AD9832_RESET | AD9832_CLR;
276 st->data = cpu_to_be16((AD9832_CMD_SLEEPRESCLR << CMD_SHIFT) |
277 st->ctrl_src);
278 ret = spi_sync(st->spi, &st->msg);
279 if (ret) {
280 dev_err(&spi->dev, "device init failed\n");
281 goto error_free_device;
282 }
283
284 ret = ad9832_write_frequency(st, AD9832_FREQ0HM, pdata->freq0);
285 if (ret)
286 goto error_free_device;
287
288 ret = ad9832_write_frequency(st, AD9832_FREQ1HM, pdata->freq1);
289 if (ret)
290 goto error_free_device;
291
292 ret = ad9832_write_phase(st, AD9832_PHASE0H, pdata->phase0);
293 if (ret)
294 goto error_free_device;
295
296 ret = ad9832_write_phase(st, AD9832_PHASE1H, pdata->phase1);
297 if (ret)
298 goto error_free_device;
299
300 ret = ad9832_write_phase(st, AD9832_PHASE2H, pdata->phase2);
301 if (ret)
302 goto error_free_device;
303
304 ret = ad9832_write_phase(st, AD9832_PHASE3H, pdata->phase3);
305 if (ret)
306 goto error_free_device;
307
308 ret = iio_device_register(indio_dev);
309 if (ret)
310 goto error_free_device;
311
312 return 0;
313
314error_free_device:
315 iio_free_device(indio_dev);
316error_disable_reg:
317 if (!IS_ERR(reg))
318 regulator_disable(reg);
319error_put_reg:
320 if (!IS_ERR(reg))
321 regulator_put(reg);
322
323 return ret;
324}
325
326static int __devexit ad9832_remove(struct spi_device *spi)
327{
328 struct iio_dev *indio_dev = spi_get_drvdata(spi);
329 struct ad9832_state *st = iio_priv(indio_dev);
330 struct regulator *reg = st->reg;
331
332 iio_device_unregister(indio_dev);
333 if (!IS_ERR(reg)) {
334 regulator_disable(reg);
335 regulator_put(reg);
336 }
337 return 0;
338}
339
340static const struct spi_device_id ad9832_id[] = {
341 {"ad9832", 0},
342 {"ad9835", 0},
343 {}
344};
345
346static struct spi_driver ad9832_driver = {
347 .driver = {
348 .name = "ad9832",
349 .bus = &spi_bus_type,
350 .owner = THIS_MODULE,
351 },
352 .probe = ad9832_probe,
353 .remove = __devexit_p(ad9832_remove),
354 .id_table = ad9832_id,
355};
356
357static int __init ad9832_init(void)
358{
359 return spi_register_driver(&ad9832_driver);
360}
361module_init(ad9832_init);
362
363static void __exit ad9832_exit(void)
364{
365 spi_unregister_driver(&ad9832_driver);
366}
367module_exit(ad9832_exit);
368
369MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
370MODULE_DESCRIPTION("Analog Devices AD9832/AD9835 DDS");
371MODULE_LICENSE("GPL v2");
372MODULE_ALIAS("spi:ad9832");
diff --git a/drivers/staging/iio/dds/ad9832.h b/drivers/staging/iio/dds/ad9832.h
new file mode 100644
index 00000000000..c5b701f8aab
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9832.h
@@ -0,0 +1,126 @@
1/*
2 * AD9832 SPI DDS driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8#ifndef IIO_DDS_AD9832_H_
9#define IIO_DDS_AD9832_H_
10
11/* Registers */
12
13#define AD9832_FREQ0LL 0x0
14#define AD9832_FREQ0HL 0x1
15#define AD9832_FREQ0LM 0x2
16#define AD9832_FREQ0HM 0x3
17#define AD9832_FREQ1LL 0x4
18#define AD9832_FREQ1HL 0x5
19#define AD9832_FREQ1LM 0x6
20#define AD9832_FREQ1HM 0x7
21#define AD9832_PHASE0L 0x8
22#define AD9832_PHASE0H 0x9
23#define AD9832_PHASE1L 0xA
24#define AD9832_PHASE1H 0xB
25#define AD9832_PHASE2L 0xC
26#define AD9832_PHASE2H 0xD
27#define AD9832_PHASE3L 0xE
28#define AD9832_PHASE3H 0xF
29
30#define AD9832_PHASE_SYM 0x10
31#define AD9832_FREQ_SYM 0x11
32#define AD9832_PINCTRL_EN 0x12
33#define AD9832_OUTPUT_EN 0x13
34
35/* Command Control Bits */
36
37#define AD9832_CMD_PHA8BITSW 0x1
38#define AD9832_CMD_PHA16BITSW 0x0
39#define AD9832_CMD_FRE8BITSW 0x3
40#define AD9832_CMD_FRE16BITSW 0x2
41#define AD9832_CMD_FPSELECT 0x6
42#define AD9832_CMD_SYNCSELSRC 0x8
43#define AD9832_CMD_SLEEPRESCLR 0xC
44
45#define AD9832_FREQ (1 << 11)
46#define AD9832_PHASE(x) (((x) & 3) << 9)
47#define AD9832_SYNC (1 << 13)
48#define AD9832_SELSRC (1 << 12)
49#define AD9832_SLEEP (1 << 13)
50#define AD9832_RESET (1 << 12)
51#define AD9832_CLR (1 << 11)
52#define CMD_SHIFT 12
53#define ADD_SHIFT 8
54#define AD9832_FREQ_BITS 32
55#define AD9832_PHASE_BITS 12
56#define RES_MASK(bits) ((1 << (bits)) - 1)
57
58/**
59 * struct ad9832_state - driver instance specific data
60 * @spi: spi_device
61 * @reg: supply regulator
62 * @mclk: external master clock
63 * @ctrl_fp: cached frequency/phase control word
64 * @ctrl_ss: cached sync/selsrc control word
65 * @ctrl_src: cached sleep/reset/clr word
66 * @xfer: default spi transfer
67 * @msg: default spi message
68 * @freq_xfer: tuning word spi transfer
69 * @freq_msg: tuning word spi message
70 * @phase_xfer: tuning word spi transfer
71 * @phase_msg: tuning word spi message
72 * @data: spi transmit buffer
73 * @phase_data: tuning word spi transmit buffer
74 * @freq_data: tuning word spi transmit buffer
75 */
76
77struct ad9832_state {
78 struct spi_device *spi;
79 struct regulator *reg;
80 unsigned long mclk;
81 unsigned short ctrl_fp;
82 unsigned short ctrl_ss;
83 unsigned short ctrl_src;
84 struct spi_transfer xfer;
85 struct spi_message msg;
86 struct spi_transfer freq_xfer[4];
87 struct spi_message freq_msg;
88 struct spi_transfer phase_xfer[2];
89 struct spi_message phase_msg;
90 /*
91 * DMA (thus cache coherency maintenance) requires the
92 * transfer buffers to live in their own cache lines.
93 */
94 union {
95 unsigned short freq_data[4]____cacheline_aligned;
96 unsigned short phase_data[2];
97 unsigned short data;
98 };
99};
100
101/*
102 * TODO: struct ad9832_platform_data needs to go into include/linux/iio
103 */
104
105/**
106 * struct ad9832_platform_data - platform specific information
107 * @mclk: master clock in Hz
108 * @freq0: power up freq0 tuning word in Hz
109 * @freq1: power up freq1 tuning word in Hz
110 * @phase0: power up phase0 value [0..4095] correlates with 0..2PI
111 * @phase1: power up phase1 value [0..4095] correlates with 0..2PI
112 * @phase2: power up phase2 value [0..4095] correlates with 0..2PI
113 * @phase3: power up phase3 value [0..4095] correlates with 0..2PI
114 */
115
116struct ad9832_platform_data {
117 unsigned long mclk;
118 unsigned long freq0;
119 unsigned long freq1;
120 unsigned short phase0;
121 unsigned short phase1;
122 unsigned short phase2;
123 unsigned short phase3;
124};
125
126#endif /* IIO_DDS_AD9832_H_ */
diff --git a/drivers/staging/iio/dds/ad9834.c b/drivers/staging/iio/dds/ad9834.c
new file mode 100644
index 00000000000..e6454d58fe4
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9834.c
@@ -0,0 +1,464 @@
1/*
2 * AD9833/AD9834/AD9837/AD9838 SPI DDS driver
3 *
4 * Copyright 2010-2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
10#include <linux/workqueue.h>
11#include <linux/device.h>
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/sysfs.h>
15#include <linux/list.h>
16#include <linux/spi/spi.h>
17#include <linux/regulator/consumer.h>
18#include <linux/err.h>
19#include <asm/div64.h>
20
21#include "../iio.h"
22#include "../sysfs.h"
23#include "dds.h"
24
25#include "ad9834.h"
26
27static unsigned int ad9834_calc_freqreg(unsigned long mclk, unsigned long fout)
28{
29 unsigned long long freqreg = (u64) fout * (u64) (1 << AD9834_FREQ_BITS);
30 do_div(freqreg, mclk);
31 return freqreg;
32}
33
34static int ad9834_write_frequency(struct ad9834_state *st,
35 unsigned long addr, unsigned long fout)
36{
37 unsigned long regval;
38
39 if (fout > (st->mclk / 2))
40 return -EINVAL;
41
42 regval = ad9834_calc_freqreg(st->mclk, fout);
43
44 st->freq_data[0] = cpu_to_be16(addr | (regval &
45 RES_MASK(AD9834_FREQ_BITS / 2)));
46 st->freq_data[1] = cpu_to_be16(addr | ((regval >>
47 (AD9834_FREQ_BITS / 2)) &
48 RES_MASK(AD9834_FREQ_BITS / 2)));
49
50 return spi_sync(st->spi, &st->freq_msg);
51}
52
53static int ad9834_write_phase(struct ad9834_state *st,
54 unsigned long addr, unsigned long phase)
55{
56 if (phase > (1 << AD9834_PHASE_BITS))
57 return -EINVAL;
58 st->data = cpu_to_be16(addr | phase);
59
60 return spi_sync(st->spi, &st->msg);
61}
62
63static ssize_t ad9834_write(struct device *dev,
64 struct device_attribute *attr,
65 const char *buf,
66 size_t len)
67{
68 struct iio_dev *dev_info = dev_get_drvdata(dev);
69 struct ad9834_state *st = iio_priv(dev_info);
70 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
71 int ret;
72 long val;
73
74 ret = strict_strtoul(buf, 10, &val);
75 if (ret)
76 goto error_ret;
77
78 mutex_lock(&dev_info->mlock);
79 switch (this_attr->address) {
80 case AD9834_REG_FREQ0:
81 case AD9834_REG_FREQ1:
82 ret = ad9834_write_frequency(st, this_attr->address, val);
83 break;
84 case AD9834_REG_PHASE0:
85 case AD9834_REG_PHASE1:
86 ret = ad9834_write_phase(st, this_attr->address, val);
87 break;
88 case AD9834_OPBITEN:
89 if (st->control & AD9834_MODE) {
90 ret = -EINVAL; /* AD9843 reserved mode */
91 break;
92 }
93
94 if (val)
95 st->control |= AD9834_OPBITEN;
96 else
97 st->control &= ~AD9834_OPBITEN;
98
99 st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
100 ret = spi_sync(st->spi, &st->msg);
101 break;
102 case AD9834_PIN_SW:
103 if (val)
104 st->control |= AD9834_PIN_SW;
105 else
106 st->control &= ~AD9834_PIN_SW;
107 st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
108 ret = spi_sync(st->spi, &st->msg);
109 break;
110 case AD9834_FSEL:
111 case AD9834_PSEL:
112 if (val == 0)
113 st->control &= ~(this_attr->address | AD9834_PIN_SW);
114 else if (val == 1) {
115 st->control |= this_attr->address;
116 st->control &= ~AD9834_PIN_SW;
117 } else {
118 ret = -EINVAL;
119 break;
120 }
121 st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
122 ret = spi_sync(st->spi, &st->msg);
123 break;
124 case AD9834_RESET:
125 if (val)
126 st->control &= ~AD9834_RESET;
127 else
128 st->control |= AD9834_RESET;
129
130 st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
131 ret = spi_sync(st->spi, &st->msg);
132 break;
133 default:
134 ret = -ENODEV;
135 }
136 mutex_unlock(&dev_info->mlock);
137
138error_ret:
139 return ret ? ret : len;
140}
141
142static ssize_t ad9834_store_wavetype(struct device *dev,
143 struct device_attribute *attr,
144 const char *buf,
145 size_t len)
146{
147 struct iio_dev *dev_info = dev_get_drvdata(dev);
148 struct ad9834_state *st = iio_priv(dev_info);
149 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
150 int ret = 0;
151 bool is_ad9833_7 = (st->devid == ID_AD9833) || (st->devid == ID_AD9837);
152
153 mutex_lock(&dev_info->mlock);
154
155 switch (this_attr->address) {
156 case 0:
157 if (sysfs_streq(buf, "sine")) {
158 st->control &= ~AD9834_MODE;
159 if (is_ad9833_7)
160 st->control &= ~AD9834_OPBITEN;
161 } else if (sysfs_streq(buf, "triangle")) {
162 if (is_ad9833_7) {
163 st->control &= ~AD9834_OPBITEN;
164 st->control |= AD9834_MODE;
165 } else if (st->control & AD9834_OPBITEN) {
166 ret = -EINVAL; /* AD9843 reserved mode */
167 } else {
168 st->control |= AD9834_MODE;
169 }
170 } else if (is_ad9833_7 && sysfs_streq(buf, "square")) {
171 st->control &= ~AD9834_MODE;
172 st->control |= AD9834_OPBITEN;
173 } else {
174 ret = -EINVAL;
175 }
176
177 break;
178 case 1:
179 if (sysfs_streq(buf, "square") &&
180 !(st->control & AD9834_MODE)) {
181 st->control &= ~AD9834_MODE;
182 st->control |= AD9834_OPBITEN;
183 } else {
184 ret = -EINVAL;
185 }
186 break;
187 default:
188 ret = -EINVAL;
189 break;
190 }
191
192 if (!ret) {
193 st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
194 ret = spi_sync(st->spi, &st->msg);
195 }
196 mutex_unlock(&dev_info->mlock);
197
198 return ret ? ret : len;
199}
200
201static ssize_t ad9834_show_out0_wavetype_available(struct device *dev,
202 struct device_attribute *attr,
203 char *buf)
204{
205 struct iio_dev *dev_info = dev_get_drvdata(dev);
206 struct ad9834_state *st = iio_priv(dev_info);
207 char *str;
208
209 if ((st->devid == ID_AD9833) || (st->devid == ID_AD9837))
210 str = "sine triangle square";
211 else if (st->control & AD9834_OPBITEN)
212 str = "sine";
213 else
214 str = "sine triangle";
215
216 return sprintf(buf, "%s\n", str);
217}
218
219
220static IIO_DEVICE_ATTR(dds0_out0_wavetype_available, S_IRUGO,
221 ad9834_show_out0_wavetype_available, NULL, 0);
222
223static ssize_t ad9834_show_out1_wavetype_available(struct device *dev,
224 struct device_attribute *attr,
225 char *buf)
226{
227 struct iio_dev *dev_info = dev_get_drvdata(dev);
228 struct ad9834_state *st = iio_priv(dev_info);
229 char *str;
230
231 if (st->control & AD9834_MODE)
232 str = "";
233 else
234 str = "square";
235
236 return sprintf(buf, "%s\n", str);
237}
238
239static IIO_DEVICE_ATTR(dds0_out1_wavetype_available, S_IRUGO,
240 ad9834_show_out1_wavetype_available, NULL, 0);
241
242/**
243 * see dds.h for further information
244 */
245
246static IIO_DEV_ATTR_FREQ(0, 0, S_IWUSR, NULL, ad9834_write, AD9834_REG_FREQ0);
247static IIO_DEV_ATTR_FREQ(0, 1, S_IWUSR, NULL, ad9834_write, AD9834_REG_FREQ1);
248static IIO_DEV_ATTR_FREQSYMBOL(0, S_IWUSR, NULL, ad9834_write, AD9834_FSEL);
249static IIO_CONST_ATTR_FREQ_SCALE(0, "1"); /* 1Hz */
250
251static IIO_DEV_ATTR_PHASE(0, 0, S_IWUSR, NULL, ad9834_write, AD9834_REG_PHASE0);
252static IIO_DEV_ATTR_PHASE(0, 1, S_IWUSR, NULL, ad9834_write, AD9834_REG_PHASE1);
253static IIO_DEV_ATTR_PHASESYMBOL(0, S_IWUSR, NULL, ad9834_write, AD9834_PSEL);
254static IIO_CONST_ATTR_PHASE_SCALE(0, "0.0015339808"); /* 2PI/2^12 rad*/
255
256static IIO_DEV_ATTR_PINCONTROL_EN(0, S_IWUSR, NULL,
257 ad9834_write, AD9834_PIN_SW);
258static IIO_DEV_ATTR_OUT_ENABLE(0, S_IWUSR, NULL, ad9834_write, AD9834_RESET);
259static IIO_DEV_ATTR_OUTY_ENABLE(0, 1, S_IWUSR, NULL,
260 ad9834_write, AD9834_OPBITEN);
261static IIO_DEV_ATTR_OUT_WAVETYPE(0, 0, ad9834_store_wavetype, 0);
262static IIO_DEV_ATTR_OUT_WAVETYPE(0, 1, ad9834_store_wavetype, 1);
263
264static struct attribute *ad9834_attributes[] = {
265 &iio_dev_attr_dds0_freq0.dev_attr.attr,
266 &iio_dev_attr_dds0_freq1.dev_attr.attr,
267 &iio_const_attr_dds0_freq_scale.dev_attr.attr,
268 &iio_dev_attr_dds0_phase0.dev_attr.attr,
269 &iio_dev_attr_dds0_phase1.dev_attr.attr,
270 &iio_const_attr_dds0_phase_scale.dev_attr.attr,
271 &iio_dev_attr_dds0_pincontrol_en.dev_attr.attr,
272 &iio_dev_attr_dds0_freqsymbol.dev_attr.attr,
273 &iio_dev_attr_dds0_phasesymbol.dev_attr.attr,
274 &iio_dev_attr_dds0_out_enable.dev_attr.attr,
275 &iio_dev_attr_dds0_out1_enable.dev_attr.attr,
276 &iio_dev_attr_dds0_out0_wavetype.dev_attr.attr,
277 &iio_dev_attr_dds0_out1_wavetype.dev_attr.attr,
278 &iio_dev_attr_dds0_out0_wavetype_available.dev_attr.attr,
279 &iio_dev_attr_dds0_out1_wavetype_available.dev_attr.attr,
280 NULL,
281};
282
283static mode_t ad9834_attr_is_visible(struct kobject *kobj,
284 struct attribute *attr, int n)
285{
286 struct device *dev = container_of(kobj, struct device, kobj);
287 struct iio_dev *dev_info = dev_get_drvdata(dev);
288 struct ad9834_state *st = iio_priv(dev_info);
289
290 mode_t mode = attr->mode;
291
292 if (((st->devid == ID_AD9833) || (st->devid == ID_AD9837)) &&
293 ((attr == &iio_dev_attr_dds0_out1_enable.dev_attr.attr) ||
294 (attr == &iio_dev_attr_dds0_out1_wavetype.dev_attr.attr) ||
295 (attr ==
296 &iio_dev_attr_dds0_out1_wavetype_available.dev_attr.attr) ||
297 (attr == &iio_dev_attr_dds0_pincontrol_en.dev_attr.attr)))
298 mode = 0;
299
300 return mode;
301}
302
303static const struct attribute_group ad9834_attribute_group = {
304 .attrs = ad9834_attributes,
305 .is_visible = ad9834_attr_is_visible,
306};
307
308static const struct iio_info ad9834_info = {
309 .attrs = &ad9834_attribute_group,
310 .driver_module = THIS_MODULE,
311};
312
313static int __devinit ad9834_probe(struct spi_device *spi)
314{
315 struct ad9834_platform_data *pdata = spi->dev.platform_data;
316 struct ad9834_state *st;
317 struct iio_dev *indio_dev;
318 struct regulator *reg;
319 int ret;
320
321 if (!pdata) {
322 dev_dbg(&spi->dev, "no platform data?\n");
323 return -ENODEV;
324 }
325
326 reg = regulator_get(&spi->dev, "vcc");
327 if (!IS_ERR(reg)) {
328 ret = regulator_enable(reg);
329 if (ret)
330 goto error_put_reg;
331 }
332
333 indio_dev = iio_allocate_device(sizeof(*st));
334 if (indio_dev == NULL) {
335 ret = -ENOMEM;
336 goto error_disable_reg;
337 }
338 spi_set_drvdata(spi, indio_dev);
339 st = iio_priv(indio_dev);
340 st->mclk = pdata->mclk;
341 st->spi = spi;
342 st->devid = spi_get_device_id(spi)->driver_data;
343 st->reg = reg;
344 indio_dev->dev.parent = &spi->dev;
345 indio_dev->name = spi_get_device_id(spi)->name;
346 indio_dev->info = &ad9834_info;
347 indio_dev->modes = INDIO_DIRECT_MODE;
348
349 /* Setup default messages */
350
351 st->xfer.tx_buf = &st->data;
352 st->xfer.len = 2;
353
354 spi_message_init(&st->msg);
355 spi_message_add_tail(&st->xfer, &st->msg);
356
357 st->freq_xfer[0].tx_buf = &st->freq_data[0];
358 st->freq_xfer[0].len = 2;
359 st->freq_xfer[0].cs_change = 1;
360 st->freq_xfer[1].tx_buf = &st->freq_data[1];
361 st->freq_xfer[1].len = 2;
362
363 spi_message_init(&st->freq_msg);
364 spi_message_add_tail(&st->freq_xfer[0], &st->freq_msg);
365 spi_message_add_tail(&st->freq_xfer[1], &st->freq_msg);
366
367 st->control = AD9834_B28 | AD9834_RESET;
368
369 if (!pdata->en_div2)
370 st->control |= AD9834_DIV2;
371
372 if (!pdata->en_signbit_msb_out && (st->devid == ID_AD9834))
373 st->control |= AD9834_SIGN_PIB;
374
375 st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
376 ret = spi_sync(st->spi, &st->msg);
377 if (ret) {
378 dev_err(&spi->dev, "device init failed\n");
379 goto error_free_device;
380 }
381
382 ret = ad9834_write_frequency(st, AD9834_REG_FREQ0, pdata->freq0);
383 if (ret)
384 goto error_free_device;
385
386 ret = ad9834_write_frequency(st, AD9834_REG_FREQ1, pdata->freq1);
387 if (ret)
388 goto error_free_device;
389
390 ret = ad9834_write_phase(st, AD9834_REG_PHASE0, pdata->phase0);
391 if (ret)
392 goto error_free_device;
393
394 ret = ad9834_write_phase(st, AD9834_REG_PHASE1, pdata->phase1);
395 if (ret)
396 goto error_free_device;
397
398 ret = iio_device_register(indio_dev);
399 if (ret)
400 goto error_free_device;
401
402 return 0;
403
404error_free_device:
405 iio_free_device(indio_dev);
406error_disable_reg:
407 if (!IS_ERR(reg))
408 regulator_disable(reg);
409error_put_reg:
410 if (!IS_ERR(reg))
411 regulator_put(reg);
412 return ret;
413}
414
415static int __devexit ad9834_remove(struct spi_device *spi)
416{
417 struct iio_dev *indio_dev = spi_get_drvdata(spi);
418 struct ad9834_state *st = iio_priv(indio_dev);
419 struct regulator *reg = st->reg;
420
421 iio_device_unregister(indio_dev);
422 if (!IS_ERR(reg)) {
423 regulator_disable(reg);
424 regulator_put(reg);
425 }
426
427 return 0;
428}
429
430static const struct spi_device_id ad9834_id[] = {
431 {"ad9833", ID_AD9833},
432 {"ad9834", ID_AD9834},
433 {"ad9837", ID_AD9837},
434 {"ad9838", ID_AD9838},
435 {}
436};
437
438static struct spi_driver ad9834_driver = {
439 .driver = {
440 .name = "ad9834",
441 .bus = &spi_bus_type,
442 .owner = THIS_MODULE,
443 },
444 .probe = ad9834_probe,
445 .remove = __devexit_p(ad9834_remove),
446 .id_table = ad9834_id,
447};
448
449static int __init ad9834_init(void)
450{
451 return spi_register_driver(&ad9834_driver);
452}
453module_init(ad9834_init);
454
455static void __exit ad9834_exit(void)
456{
457 spi_unregister_driver(&ad9834_driver);
458}
459module_exit(ad9834_exit);
460
461MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
462MODULE_DESCRIPTION("Analog Devices AD9833/AD9834/AD9837/AD9838 DDS");
463MODULE_LICENSE("GPL v2");
464MODULE_ALIAS("spi:ad9834");
diff --git a/drivers/staging/iio/dds/ad9834.h b/drivers/staging/iio/dds/ad9834.h
new file mode 100644
index 00000000000..ed5ed8d0007
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9834.h
@@ -0,0 +1,112 @@
1/*
2 * AD9833/AD9834/AD9837/AD9838 SPI DDS driver
3 *
4 * Copyright 2010-2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8#ifndef IIO_DDS_AD9834_H_
9#define IIO_DDS_AD9834_H_
10
11/* Registers */
12
13#define AD9834_REG_CMD (0 << 14)
14#define AD9834_REG_FREQ0 (1 << 14)
15#define AD9834_REG_FREQ1 (2 << 14)
16#define AD9834_REG_PHASE0 (6 << 13)
17#define AD9834_REG_PHASE1 (7 << 13)
18
19/* Command Control Bits */
20
21#define AD9834_B28 (1 << 13)
22#define AD9834_HLB (1 << 12)
23#define AD9834_FSEL (1 << 11)
24#define AD9834_PSEL (1 << 10)
25#define AD9834_PIN_SW (1 << 9)
26#define AD9834_RESET (1 << 8)
27#define AD9834_SLEEP1 (1 << 7)
28#define AD9834_SLEEP12 (1 << 6)
29#define AD9834_OPBITEN (1 << 5)
30#define AD9834_SIGN_PIB (1 << 4)
31#define AD9834_DIV2 (1 << 3)
32#define AD9834_MODE (1 << 1)
33
34#define AD9834_FREQ_BITS 28
35#define AD9834_PHASE_BITS 12
36
37#define RES_MASK(bits) ((1 << (bits)) - 1)
38
39/**
40 * struct ad9834_state - driver instance specific data
41 * @spi: spi_device
42 * @reg: supply regulator
43 * @mclk: external master clock
44 * @control: cached control word
45 * @xfer: default spi transfer
46 * @msg: default spi message
47 * @freq_xfer: tuning word spi transfer
48 * @freq_msg: tuning word spi message
49 * @data: spi transmit buffer
50 * @freq_data: tuning word spi transmit buffer
51 */
52
53struct ad9834_state {
54 struct spi_device *spi;
55 struct regulator *reg;
56 unsigned int mclk;
57 unsigned short control;
58 unsigned short devid;
59 struct spi_transfer xfer;
60 struct spi_message msg;
61 struct spi_transfer freq_xfer[2];
62 struct spi_message freq_msg;
63
64 /*
65 * DMA (thus cache coherency maintenance) requires the
66 * transfer buffers to live in their own cache lines.
67 */
68 unsigned short data ____cacheline_aligned;
69 unsigned short freq_data[2] ;
70};
71
72
73/*
74 * TODO: struct ad7887_platform_data needs to go into include/linux/iio
75 */
76
77/**
78 * struct ad9834_platform_data - platform specific information
79 * @mclk: master clock in Hz
80 * @freq0: power up freq0 tuning word in Hz
81 * @freq1: power up freq1 tuning word in Hz
82 * @phase0: power up phase0 value [0..4095] correlates with 0..2PI
83 * @phase1: power up phase1 value [0..4095] correlates with 0..2PI
84 * @en_div2: digital output/2 is passed to the SIGN BIT OUT pin
85 * @en_signbit_msb_out: the MSB (or MSB/2) of the DAC data is connected to the
86 * SIGN BIT OUT pin. en_div2 controls whether it is the MSB
87 * or MSB/2 that is output. if en_signbit_msb_out=false,
88 * the on-board comparator is connected to SIGN BIT OUT
89 */
90
91struct ad9834_platform_data {
92 unsigned int mclk;
93 unsigned int freq0;
94 unsigned int freq1;
95 unsigned short phase0;
96 unsigned short phase1;
97 bool en_div2;
98 bool en_signbit_msb_out;
99};
100
101/**
102 * ad9834_supported_device_ids:
103 */
104
105enum ad9834_supported_device_ids {
106 ID_AD9833,
107 ID_AD9834,
108 ID_AD9837,
109 ID_AD9838,
110};
111
112#endif /* IIO_DDS_AD9834_H_ */
diff --git a/drivers/staging/iio/dds/ad9850.c b/drivers/staging/iio/dds/ad9850.c
new file mode 100644
index 00000000000..d7c9d05f635
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9850.c
@@ -0,0 +1,145 @@
1/*
2 * Driver for ADI Direct Digital Synthesis ad9850
3 *
4 * Copyright (c) 2010-2010 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#include <linux/types.h>
12#include <linux/mutex.h>
13#include <linux/device.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20
21#define DRV_NAME "ad9850"
22
23#define value_mask (u16)0xf000
24#define addr_shift 12
25
26/* Register format: 4 bits addr + 12 bits value */
27struct ad9850_config {
28 u8 control[5];
29};
30
31struct ad9850_state {
32 struct mutex lock;
33 struct spi_device *sdev;
34};
35
36static ssize_t ad9850_set_parameter(struct device *dev,
37 struct device_attribute *attr,
38 const char *buf,
39 size_t len)
40{
41 struct spi_message msg;
42 struct spi_transfer xfer;
43 int ret;
44 struct ad9850_config *config = (struct ad9850_config *)buf;
45 struct iio_dev *idev = dev_get_drvdata(dev);
46 struct ad9850_state *st = iio_priv(idev);
47
48 xfer.len = len;
49 xfer.tx_buf = config;
50 mutex_lock(&st->lock);
51
52 spi_message_init(&msg);
53 spi_message_add_tail(&xfer, &msg);
54 ret = spi_sync(st->sdev, &msg);
55 if (ret)
56 goto error_ret;
57error_ret:
58 mutex_unlock(&st->lock);
59
60 return ret ? ret : len;
61}
62
63static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9850_set_parameter, 0);
64
65static struct attribute *ad9850_attributes[] = {
66 &iio_dev_attr_dds.dev_attr.attr,
67 NULL,
68};
69
70static const struct attribute_group ad9850_attribute_group = {
71 .attrs = ad9850_attributes,
72};
73
74static const struct iio_info ad9850_info = {
75 .attrs = &ad9850_attribute_group,
76 .driver_module = THIS_MODULE,
77};
78
79static int __devinit ad9850_probe(struct spi_device *spi)
80{
81 struct ad9850_state *st;
82 struct iio_dev *idev;
83 int ret = 0;
84
85 idev = iio_allocate_device(sizeof(*st));
86 if (idev == NULL) {
87 ret = -ENOMEM;
88 goto error_ret;
89 }
90 spi_set_drvdata(spi, idev);
91 st = iio_priv(idev);
92 mutex_init(&st->lock);
93 st->sdev = spi;
94
95 idev->dev.parent = &spi->dev;
96 idev->info = &ad9850_info;
97 idev->modes = INDIO_DIRECT_MODE;
98
99 ret = iio_device_register(idev);
100 if (ret)
101 goto error_free_dev;
102 spi->max_speed_hz = 2000000;
103 spi->mode = SPI_MODE_3;
104 spi->bits_per_word = 16;
105 spi_setup(spi);
106
107 return 0;
108
109error_free_dev:
110 iio_free_device(idev);
111error_ret:
112 return ret;
113}
114
115static int __devexit ad9850_remove(struct spi_device *spi)
116{
117 iio_device_unregister(spi_get_drvdata(spi));
118
119 return 0;
120}
121
122static struct spi_driver ad9850_driver = {
123 .driver = {
124 .name = DRV_NAME,
125 .owner = THIS_MODULE,
126 },
127 .probe = ad9850_probe,
128 .remove = __devexit_p(ad9850_remove),
129};
130
131static __init int ad9850_spi_init(void)
132{
133 return spi_register_driver(&ad9850_driver);
134}
135module_init(ad9850_spi_init);
136
137static __exit void ad9850_spi_exit(void)
138{
139 spi_unregister_driver(&ad9850_driver);
140}
141module_exit(ad9850_spi_exit);
142
143MODULE_AUTHOR("Cliff Cai");
144MODULE_DESCRIPTION("Analog Devices ad9850 driver");
145MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dds/ad9852.c b/drivers/staging/iio/dds/ad9852.c
new file mode 100644
index 00000000000..0184585425d
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9852.c
@@ -0,0 +1,297 @@
1/*
2 * Driver for ADI Direct Digital Synthesis ad9852
3 *
4 * Copyright (c) 2010 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#include <linux/types.h>
12#include <linux/mutex.h>
13#include <linux/device.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20
21#define DRV_NAME "ad9852"
22
23#define addr_phaad1 0x0
24#define addr_phaad2 0x1
25#define addr_fretu1 0x2
26#define addr_fretu2 0x3
27#define addr_delfre 0x4
28#define addr_updclk 0x5
29#define addr_ramclk 0x6
30#define addr_contrl 0x7
31#define addr_optskm 0x8
32#define addr_optskr 0xa
33#define addr_dacctl 0xb
34
35#define COMPPD (1 << 4)
36#define REFMULT2 (1 << 2)
37#define BYPPLL (1 << 5)
38#define PLLRANG (1 << 6)
39#define IEUPCLK (1)
40#define OSKEN (1 << 5)
41
42#define read_bit (1 << 7)
43
44/* Register format: 1 byte addr + value */
45struct ad9852_config {
46 u8 phajst0[3];
47 u8 phajst1[3];
48 u8 fretun1[6];
49 u8 fretun2[6];
50 u8 dltafre[6];
51 u8 updtclk[5];
52 u8 ramprat[4];
53 u8 control[5];
54 u8 outpskm[3];
55 u8 outpskr[2];
56 u8 daccntl[3];
57};
58
59struct ad9852_state {
60 struct mutex lock;
61 struct spi_device *sdev;
62};
63
64static ssize_t ad9852_set_parameter(struct device *dev,
65 struct device_attribute *attr,
66 const char *buf,
67 size_t len)
68{
69 struct spi_message msg;
70 struct spi_transfer xfer;
71 int ret;
72 struct ad9852_config *config = (struct ad9852_config *)buf;
73 struct iio_dev *idev = dev_get_drvdata(dev);
74 struct ad9852_state *st = iio_priv(idev);
75
76 xfer.len = 3;
77 xfer.tx_buf = &config->phajst0[0];
78 mutex_lock(&st->lock);
79
80 spi_message_init(&msg);
81 spi_message_add_tail(&xfer, &msg);
82 ret = spi_sync(st->sdev, &msg);
83 if (ret)
84 goto error_ret;
85
86 xfer.len = 3;
87 xfer.tx_buf = &config->phajst1[0];
88
89 spi_message_init(&msg);
90 spi_message_add_tail(&xfer, &msg);
91 ret = spi_sync(st->sdev, &msg);
92 if (ret)
93 goto error_ret;
94
95 xfer.len = 6;
96 xfer.tx_buf = &config->fretun1[0];
97
98 spi_message_init(&msg);
99 spi_message_add_tail(&xfer, &msg);
100 ret = spi_sync(st->sdev, &msg);
101 if (ret)
102 goto error_ret;
103
104 xfer.len = 6;
105 xfer.tx_buf = &config->fretun2[0];
106
107 spi_message_init(&msg);
108 spi_message_add_tail(&xfer, &msg);
109 ret = spi_sync(st->sdev, &msg);
110 if (ret)
111 goto error_ret;
112
113 xfer.len = 6;
114 xfer.tx_buf = &config->dltafre[0];
115
116 spi_message_init(&msg);
117 spi_message_add_tail(&xfer, &msg);
118 ret = spi_sync(st->sdev, &msg);
119 if (ret)
120 goto error_ret;
121
122 xfer.len = 5;
123 xfer.tx_buf = &config->updtclk[0];
124
125 spi_message_init(&msg);
126 spi_message_add_tail(&xfer, &msg);
127 ret = spi_sync(st->sdev, &msg);
128 if (ret)
129 goto error_ret;
130
131 xfer.len = 4;
132 xfer.tx_buf = &config->ramprat[0];
133
134 spi_message_init(&msg);
135 spi_message_add_tail(&xfer, &msg);
136 ret = spi_sync(st->sdev, &msg);
137 if (ret)
138 goto error_ret;
139
140 xfer.len = 5;
141 xfer.tx_buf = &config->control[0];
142
143 spi_message_init(&msg);
144 spi_message_add_tail(&xfer, &msg);
145 ret = spi_sync(st->sdev, &msg);
146 if (ret)
147 goto error_ret;
148
149 xfer.len = 3;
150 xfer.tx_buf = &config->outpskm[0];
151
152 spi_message_init(&msg);
153 spi_message_add_tail(&xfer, &msg);
154 ret = spi_sync(st->sdev, &msg);
155 if (ret)
156 goto error_ret;
157
158 xfer.len = 2;
159 xfer.tx_buf = &config->outpskr[0];
160
161 spi_message_init(&msg);
162 spi_message_add_tail(&xfer, &msg);
163 ret = spi_sync(st->sdev, &msg);
164 if (ret)
165 goto error_ret;
166
167 xfer.len = 3;
168 xfer.tx_buf = &config->daccntl[0];
169
170 spi_message_init(&msg);
171 spi_message_add_tail(&xfer, &msg);
172 ret = spi_sync(st->sdev, &msg);
173 if (ret)
174 goto error_ret;
175error_ret:
176 mutex_unlock(&st->lock);
177
178 return ret ? ret : len;
179}
180
181static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9852_set_parameter, 0);
182
183static void ad9852_init(struct ad9852_state *st)
184{
185 struct spi_message msg;
186 struct spi_transfer xfer;
187 int ret;
188 u8 config[5];
189
190 config[0] = addr_contrl;
191 config[1] = COMPPD;
192 config[2] = REFMULT2 | BYPPLL | PLLRANG;
193 config[3] = IEUPCLK;
194 config[4] = OSKEN;
195
196 mutex_lock(&st->lock);
197
198 xfer.len = 5;
199 xfer.tx_buf = &config;
200
201 spi_message_init(&msg);
202 spi_message_add_tail(&xfer, &msg);
203 ret = spi_sync(st->sdev, &msg);
204 if (ret)
205 goto error_ret;
206
207error_ret:
208 mutex_unlock(&st->lock);
209
210
211
212}
213
214static struct attribute *ad9852_attributes[] = {
215 &iio_dev_attr_dds.dev_attr.attr,
216 NULL,
217};
218
219static const struct attribute_group ad9852_attribute_group = {
220 .name = DRV_NAME,
221 .attrs = ad9852_attributes,
222};
223
224static const struct iio_info ad9852_info = {
225 .attrs = &ad9852_attribute_group,
226 .driver_module = THIS_MODULE,
227};
228
229static int __devinit ad9852_probe(struct spi_device *spi)
230{
231 struct ad9852_state *st;
232 struct iio_dev *idev;
233 int ret = 0;
234
235 idev = iio_allocate_device(sizeof(*st));
236 if (idev == NULL) {
237 ret = -ENOMEM;
238 goto error_ret;
239 }
240 st = iio_priv(idev);
241 spi_set_drvdata(spi, idev);
242 mutex_init(&st->lock);
243 st->sdev = spi;
244
245 idev->dev.parent = &spi->dev;
246 idev->info = &ad9852_info;
247 idev->modes = INDIO_DIRECT_MODE;
248
249 ret = iio_device_register(idev);
250 if (ret)
251 goto error_free_dev;
252 spi->max_speed_hz = 2000000;
253 spi->mode = SPI_MODE_3;
254 spi->bits_per_word = 8;
255 spi_setup(spi);
256 ad9852_init(st);
257
258 return 0;
259
260error_free_dev:
261 iio_free_device(idev);
262
263error_ret:
264 return ret;
265}
266
267static int __devexit ad9852_remove(struct spi_device *spi)
268{
269 iio_device_unregister(spi_get_drvdata(spi));
270
271 return 0;
272}
273
274static struct spi_driver ad9852_driver = {
275 .driver = {
276 .name = DRV_NAME,
277 .owner = THIS_MODULE,
278 },
279 .probe = ad9852_probe,
280 .remove = __devexit_p(ad9852_remove),
281};
282
283static __init int ad9852_spi_init(void)
284{
285 return spi_register_driver(&ad9852_driver);
286}
287module_init(ad9852_spi_init);
288
289static __exit void ad9852_spi_exit(void)
290{
291 spi_unregister_driver(&ad9852_driver);
292}
293module_exit(ad9852_spi_exit);
294
295MODULE_AUTHOR("Cliff Cai");
296MODULE_DESCRIPTION("Analog Devices ad9852 driver");
297MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dds/ad9910.c b/drivers/staging/iio/dds/ad9910.c
new file mode 100644
index 00000000000..0fa217f7b90
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9910.c
@@ -0,0 +1,430 @@
1/*
2 * Driver for ADI Direct Digital Synthesis ad9910
3 *
4 * Copyright (c) 2010 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#include <linux/types.h>
12#include <linux/mutex.h>
13#include <linux/device.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20
21#define DRV_NAME "ad9910"
22
23#define CFR1 0x0
24#define CFR2 0x1
25#define CFR3 0x2
26
27#define AUXDAC 0x3
28#define IOUPD 0x4
29#define FTW 0x7
30#define POW 0x8
31#define ASF 0x9
32#define MULTC 0x0A
33#define DIG_RAMPL 0x0B
34#define DIG_RAMPS 0x0C
35#define DIG_RAMPR 0x0D
36#define SIN_TONEP0 0x0E
37#define SIN_TONEP1 0x0F
38#define SIN_TONEP2 0x10
39#define SIN_TONEP3 0x11
40#define SIN_TONEP4 0x12
41#define SIN_TONEP5 0x13
42#define SIN_TONEP6 0x14
43#define SIN_TONEP7 0x15
44
45#define RAM_ENABLE (1 << 7)
46
47#define MANUAL_OSK (1 << 7)
48#define INVSIC (1 << 6)
49#define DDS_SINEOP (1)
50
51#define AUTO_OSK (1)
52#define OSKEN (1 << 1)
53#define LOAD_ARR (1 << 2)
54#define CLR_PHA (1 << 3)
55#define CLR_DIG (1 << 4)
56#define ACLR_PHA (1 << 5)
57#define ACLR_DIG (1 << 6)
58#define LOAD_LRR (1 << 7)
59
60#define LSB_FST (1)
61#define SDIO_IPT (1 << 1)
62#define EXT_PWD (1 << 3)
63#define ADAC_PWD (1 << 4)
64#define REFCLK_PWD (1 << 5)
65#define DAC_PWD (1 << 6)
66#define DIG_PWD (1 << 7)
67
68#define ENA_AMP (1)
69#define READ_FTW (1)
70#define DIGR_LOW (1 << 1)
71#define DIGR_HIGH (1 << 2)
72#define DIGR_ENA (1 << 3)
73#define SYNCCLK_ENA (1 << 6)
74#define ITER_IOUPD (1 << 7)
75
76#define TX_ENA (1 << 1)
77#define PDCLK_INV (1 << 2)
78#define PDCLK_ENB (1 << 3)
79
80#define PARA_ENA (1 << 4)
81#define SYNC_DIS (1 << 5)
82#define DATA_ASS (1 << 6)
83#define MATCH_ENA (1 << 7)
84
85#define PLL_ENA (1)
86#define PFD_RST (1 << 2)
87#define REFCLK_RST (1 << 6)
88#define REFCLK_BYP (1 << 7)
89
90/* Register format: 1 byte addr + value */
91struct ad9910_config {
92 u8 auxdac[5];
93 u8 ioupd[5];
94 u8 ftw[5];
95 u8 pow[3];
96 u8 asf[5];
97 u8 multc[5];
98 u8 dig_rampl[9];
99 u8 dig_ramps[9];
100 u8 dig_rampr[5];
101 u8 sin_tonep0[9];
102 u8 sin_tonep1[9];
103 u8 sin_tonep2[9];
104 u8 sin_tonep3[9];
105 u8 sin_tonep4[9];
106 u8 sin_tonep5[9];
107 u8 sin_tonep6[9];
108 u8 sin_tonep7[9];
109};
110
111struct ad9910_state {
112 struct mutex lock;
113 struct spi_device *sdev;
114};
115
116static ssize_t ad9910_set_parameter(struct device *dev,
117 struct device_attribute *attr,
118 const char *buf,
119 size_t len)
120{
121 struct spi_message msg;
122 struct spi_transfer xfer;
123 int ret;
124 struct ad9910_config *config = (struct ad9910_config *)buf;
125 struct iio_dev *idev = dev_get_drvdata(dev);
126 struct ad9910_state *st = iio_priv(idev);
127
128 xfer.len = 5;
129 xfer.tx_buf = &config->auxdac[0];
130 mutex_lock(&st->lock);
131
132 spi_message_init(&msg);
133 spi_message_add_tail(&xfer, &msg);
134 ret = spi_sync(st->sdev, &msg);
135 if (ret)
136 goto error_ret;
137
138 xfer.len = 5;
139 xfer.tx_buf = &config->ioupd[0];
140
141 spi_message_init(&msg);
142 spi_message_add_tail(&xfer, &msg);
143 ret = spi_sync(st->sdev, &msg);
144 if (ret)
145 goto error_ret;
146
147 xfer.len = 5;
148 xfer.tx_buf = &config->ftw[0];
149
150 spi_message_init(&msg);
151 spi_message_add_tail(&xfer, &msg);
152 ret = spi_sync(st->sdev, &msg);
153 if (ret)
154 goto error_ret;
155
156 xfer.len = 3;
157 xfer.tx_buf = &config->pow[0];
158
159 spi_message_init(&msg);
160 spi_message_add_tail(&xfer, &msg);
161 ret = spi_sync(st->sdev, &msg);
162 if (ret)
163 goto error_ret;
164
165 xfer.len = 5;
166 xfer.tx_buf = &config->asf[0];
167
168 spi_message_init(&msg);
169 spi_message_add_tail(&xfer, &msg);
170 ret = spi_sync(st->sdev, &msg);
171 if (ret)
172 goto error_ret;
173
174 xfer.len = 5;
175 xfer.tx_buf = &config->multc[0];
176
177 spi_message_init(&msg);
178 spi_message_add_tail(&xfer, &msg);
179 ret = spi_sync(st->sdev, &msg);
180 if (ret)
181 goto error_ret;
182
183 xfer.len = 9;
184 xfer.tx_buf = &config->dig_rampl[0];
185
186 spi_message_init(&msg);
187 spi_message_add_tail(&xfer, &msg);
188 ret = spi_sync(st->sdev, &msg);
189 if (ret)
190 goto error_ret;
191
192 xfer.len = 9;
193 xfer.tx_buf = &config->dig_ramps[0];
194
195 spi_message_init(&msg);
196 spi_message_add_tail(&xfer, &msg);
197 ret = spi_sync(st->sdev, &msg);
198 if (ret)
199 goto error_ret;
200
201 xfer.len = 5;
202 xfer.tx_buf = &config->dig_rampr[0];
203
204 spi_message_init(&msg);
205 spi_message_add_tail(&xfer, &msg);
206 ret = spi_sync(st->sdev, &msg);
207 if (ret)
208 goto error_ret;
209
210 xfer.len = 9;
211 xfer.tx_buf = &config->sin_tonep0[0];
212
213 spi_message_init(&msg);
214 spi_message_add_tail(&xfer, &msg);
215 ret = spi_sync(st->sdev, &msg);
216 if (ret)
217 goto error_ret;
218
219 xfer.len = 9;
220 xfer.tx_buf = &config->sin_tonep1[0];
221
222 spi_message_init(&msg);
223 spi_message_add_tail(&xfer, &msg);
224 ret = spi_sync(st->sdev, &msg);
225 if (ret)
226 goto error_ret;
227
228 xfer.len = 9;
229 xfer.tx_buf = &config->sin_tonep2[0];
230
231 spi_message_init(&msg);
232 spi_message_add_tail(&xfer, &msg);
233 ret = spi_sync(st->sdev, &msg);
234 if (ret)
235 goto error_ret;
236 xfer.len = 9;
237 xfer.tx_buf = &config->sin_tonep3[0];
238
239 spi_message_init(&msg);
240 spi_message_add_tail(&xfer, &msg);
241 ret = spi_sync(st->sdev, &msg);
242 if (ret)
243 goto error_ret;
244
245 xfer.len = 9;
246 xfer.tx_buf = &config->sin_tonep4[0];
247
248 spi_message_init(&msg);
249 spi_message_add_tail(&xfer, &msg);
250 ret = spi_sync(st->sdev, &msg);
251 if (ret)
252 goto error_ret;
253
254 xfer.len = 9;
255 xfer.tx_buf = &config->sin_tonep5[0];
256
257 spi_message_init(&msg);
258 spi_message_add_tail(&xfer, &msg);
259 ret = spi_sync(st->sdev, &msg);
260 if (ret)
261 goto error_ret;
262
263 xfer.len = 9;
264 xfer.tx_buf = &config->sin_tonep6[0];
265
266 spi_message_init(&msg);
267 spi_message_add_tail(&xfer, &msg);
268 ret = spi_sync(st->sdev, &msg);
269 if (ret)
270 goto error_ret;
271
272 xfer.len = 9;
273 xfer.tx_buf = &config->sin_tonep7[0];
274
275 spi_message_init(&msg);
276 spi_message_add_tail(&xfer, &msg);
277 ret = spi_sync(st->sdev, &msg);
278 if (ret)
279 goto error_ret;
280error_ret:
281 mutex_unlock(&st->lock);
282
283 return ret ? ret : len;
284}
285
286static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9910_set_parameter, 0);
287
288static void ad9910_init(struct ad9910_state *st)
289{
290 struct spi_message msg;
291 struct spi_transfer xfer;
292 int ret;
293 u8 cfr[5];
294
295 cfr[0] = CFR1;
296 cfr[1] = 0;
297 cfr[2] = MANUAL_OSK | INVSIC | DDS_SINEOP;
298 cfr[3] = AUTO_OSK | OSKEN | ACLR_PHA | ACLR_DIG | LOAD_LRR;
299 cfr[4] = 0;
300
301 mutex_lock(&st->lock);
302
303 xfer.len = 5;
304 xfer.tx_buf = &cfr;
305
306 spi_message_init(&msg);
307 spi_message_add_tail(&xfer, &msg);
308 ret = spi_sync(st->sdev, &msg);
309 if (ret)
310 goto error_ret;
311
312 cfr[0] = CFR2;
313 cfr[1] = ENA_AMP;
314 cfr[2] = READ_FTW | DIGR_ENA | ITER_IOUPD;
315 cfr[3] = TX_ENA | PDCLK_INV | PDCLK_ENB;
316 cfr[4] = PARA_ENA;
317
318 xfer.len = 5;
319 xfer.tx_buf = &cfr;
320
321 spi_message_init(&msg);
322 spi_message_add_tail(&xfer, &msg);
323 ret = spi_sync(st->sdev, &msg);
324 if (ret)
325 goto error_ret;
326
327 cfr[0] = CFR3;
328 cfr[1] = PLL_ENA;
329 cfr[2] = 0;
330 cfr[3] = REFCLK_RST | REFCLK_BYP;
331 cfr[4] = 0;
332
333 xfer.len = 5;
334 xfer.tx_buf = &cfr;
335
336 spi_message_init(&msg);
337 spi_message_add_tail(&xfer, &msg);
338 ret = spi_sync(st->sdev, &msg);
339 if (ret)
340 goto error_ret;
341
342error_ret:
343 mutex_unlock(&st->lock);
344
345
346
347}
348
349static struct attribute *ad9910_attributes[] = {
350 &iio_dev_attr_dds.dev_attr.attr,
351 NULL,
352};
353
354static const struct attribute_group ad9910_attribute_group = {
355 .name = DRV_NAME,
356 .attrs = ad9910_attributes,
357};
358
359static const struct iio_info ad9910_info = {
360 .attrs = &ad9910_attribute_group,
361 .driver_module = THIS_MODULE,
362};
363
364static int __devinit ad9910_probe(struct spi_device *spi)
365{
366 struct ad9910_state *st;
367 struct iio_dev *idev;
368 int ret = 0;
369
370 idev = iio_allocate_device(sizeof(*st));
371 if (idev == NULL) {
372 ret = -ENOMEM;
373 goto error_ret;
374 }
375 spi_set_drvdata(spi, idev);
376 st = iio_priv(idev);
377 mutex_init(&st->lock);
378 st->sdev = spi;
379
380 idev->dev.parent = &spi->dev;
381 idev->info = &ad9910_info;
382 idev->modes = INDIO_DIRECT_MODE;
383
384 ret = iio_device_register(idev);
385 if (ret)
386 goto error_free_dev;
387 spi->max_speed_hz = 2000000;
388 spi->mode = SPI_MODE_3;
389 spi->bits_per_word = 8;
390 spi_setup(spi);
391 ad9910_init(st);
392 return 0;
393
394error_free_dev:
395 iio_free_device(idev);
396error_ret:
397 return ret;
398}
399
400static int __devexit ad9910_remove(struct spi_device *spi)
401{
402 iio_device_unregister(spi_get_drvdata(spi));
403
404 return 0;
405}
406
407static struct spi_driver ad9910_driver = {
408 .driver = {
409 .name = DRV_NAME,
410 .owner = THIS_MODULE,
411 },
412 .probe = ad9910_probe,
413 .remove = __devexit_p(ad9910_remove),
414};
415
416static __init int ad9910_spi_init(void)
417{
418 return spi_register_driver(&ad9910_driver);
419}
420module_init(ad9910_spi_init);
421
422static __exit void ad9910_spi_exit(void)
423{
424 spi_unregister_driver(&ad9910_driver);
425}
426module_exit(ad9910_spi_exit);
427
428MODULE_AUTHOR("Cliff Cai");
429MODULE_DESCRIPTION("Analog Devices ad9910 driver");
430MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dds/ad9951.c b/drivers/staging/iio/dds/ad9951.c
new file mode 100644
index 00000000000..d361d1f125d
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9951.c
@@ -0,0 +1,241 @@
1/*
2 * Driver for ADI Direct Digital Synthesis ad9951
3 *
4 * Copyright (c) 2010 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#include <linux/types.h>
12#include <linux/mutex.h>
13#include <linux/device.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17
18#include "../iio.h"
19#include "../sysfs.h"
20
21#define DRV_NAME "ad9951"
22
23#define CFR1 0x0
24#define CFR2 0x1
25
26#define AUTO_OSK (1)
27#define OSKEN (1 << 1)
28#define LOAD_ARR (1 << 2)
29
30#define AUTO_SYNC (1 << 7)
31
32#define LSB_FST (1)
33#define SDIO_IPT (1 << 1)
34#define CLR_PHA (1 << 2)
35#define SINE_OPT (1 << 4)
36#define ACLR_PHA (1 << 5)
37
38#define VCO_RANGE (1 << 2)
39
40#define CRS_OPT (1 << 1)
41#define HMANU_SYNC (1 << 2)
42#define HSPD_SYNC (1 << 3)
43
44/* Register format: 1 byte addr + value */
45struct ad9951_config {
46 u8 asf[3];
47 u8 arr[2];
48 u8 ftw0[5];
49 u8 ftw1[3];
50};
51
52struct ad9951_state {
53 struct mutex lock;
54 struct spi_device *sdev;
55};
56
57static ssize_t ad9951_set_parameter(struct device *dev,
58 struct device_attribute *attr,
59 const char *buf,
60 size_t len)
61{
62 struct spi_message msg;
63 struct spi_transfer xfer;
64 int ret;
65 struct ad9951_config *config = (struct ad9951_config *)buf;
66 struct iio_dev *idev = dev_get_drvdata(dev);
67 struct ad9951_state *st = iio_priv(idev);
68
69 xfer.len = 3;
70 xfer.tx_buf = &config->asf[0];
71 mutex_lock(&st->lock);
72
73 spi_message_init(&msg);
74 spi_message_add_tail(&xfer, &msg);
75 ret = spi_sync(st->sdev, &msg);
76 if (ret)
77 goto error_ret;
78
79 xfer.len = 2;
80 xfer.tx_buf = &config->arr[0];
81
82 spi_message_init(&msg);
83 spi_message_add_tail(&xfer, &msg);
84 ret = spi_sync(st->sdev, &msg);
85 if (ret)
86 goto error_ret;
87
88 xfer.len = 5;
89 xfer.tx_buf = &config->ftw0[0];
90
91 spi_message_init(&msg);
92 spi_message_add_tail(&xfer, &msg);
93 ret = spi_sync(st->sdev, &msg);
94 if (ret)
95 goto error_ret;
96
97 xfer.len = 3;
98 xfer.tx_buf = &config->ftw1[0];
99
100 spi_message_init(&msg);
101 spi_message_add_tail(&xfer, &msg);
102 ret = spi_sync(st->sdev, &msg);
103 if (ret)
104 goto error_ret;
105error_ret:
106 mutex_unlock(&st->lock);
107
108 return ret ? ret : len;
109}
110
111static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9951_set_parameter, 0);
112
113static void ad9951_init(struct ad9951_state *st)
114{
115 struct spi_message msg;
116 struct spi_transfer xfer;
117 int ret;
118 u8 cfr[5];
119
120 cfr[0] = CFR1;
121 cfr[1] = 0;
122 cfr[2] = LSB_FST | CLR_PHA | SINE_OPT | ACLR_PHA;
123 cfr[3] = AUTO_OSK | OSKEN | LOAD_ARR;
124 cfr[4] = 0;
125
126 mutex_lock(&st->lock);
127
128 xfer.len = 5;
129 xfer.tx_buf = &cfr;
130
131 spi_message_init(&msg);
132 spi_message_add_tail(&xfer, &msg);
133 ret = spi_sync(st->sdev, &msg);
134 if (ret)
135 goto error_ret;
136
137 cfr[0] = CFR2;
138 cfr[1] = VCO_RANGE;
139 cfr[2] = HSPD_SYNC;
140 cfr[3] = 0;
141
142 xfer.len = 4;
143 xfer.tx_buf = &cfr;
144
145 spi_message_init(&msg);
146 spi_message_add_tail(&xfer, &msg);
147 ret = spi_sync(st->sdev, &msg);
148 if (ret)
149 goto error_ret;
150
151error_ret:
152 mutex_unlock(&st->lock);
153
154
155
156}
157
158static struct attribute *ad9951_attributes[] = {
159 &iio_dev_attr_dds.dev_attr.attr,
160 NULL,
161};
162
163static const struct attribute_group ad9951_attribute_group = {
164 .name = DRV_NAME,
165 .attrs = ad9951_attributes,
166};
167
168static const struct iio_info ad9951_info = {
169 .attrs = &ad9951_attribute_group,
170 .driver_module = THIS_MODULE,
171};
172
173static int __devinit ad9951_probe(struct spi_device *spi)
174{
175 struct ad9951_state *st;
176 struct iio_dev *idev;
177 int ret = 0;
178
179 idev = iio_allocate_device(sizeof(*st));
180 if (idev == NULL) {
181 ret = -ENOMEM;
182 goto error_ret;
183 }
184 spi_set_drvdata(spi, idev);
185 st = iio_priv(idev);
186 mutex_init(&st->lock);
187 st->sdev = spi;
188
189 idev->dev.parent = &spi->dev;
190
191 idev->info = &ad9951_info;
192 idev->modes = INDIO_DIRECT_MODE;
193
194 ret = iio_device_register(idev);
195 if (ret)
196 goto error_free_dev;
197 spi->max_speed_hz = 2000000;
198 spi->mode = SPI_MODE_3;
199 spi->bits_per_word = 8;
200 spi_setup(spi);
201 ad9951_init(st);
202 return 0;
203
204error_free_dev:
205 iio_free_device(idev);
206
207error_ret:
208 return ret;
209}
210
211static int __devexit ad9951_remove(struct spi_device *spi)
212{
213 iio_device_unregister(spi_get_drvdata(spi));
214
215 return 0;
216}
217
218static struct spi_driver ad9951_driver = {
219 .driver = {
220 .name = DRV_NAME,
221 .owner = THIS_MODULE,
222 },
223 .probe = ad9951_probe,
224 .remove = __devexit_p(ad9951_remove),
225};
226
227static __init int ad9951_spi_init(void)
228{
229 return spi_register_driver(&ad9951_driver);
230}
231module_init(ad9951_spi_init);
232
233static __exit void ad9951_spi_exit(void)
234{
235 spi_unregister_driver(&ad9951_driver);
236}
237module_exit(ad9951_spi_exit);
238
239MODULE_AUTHOR("Cliff Cai");
240MODULE_DESCRIPTION("Analog Devices ad9951 driver");
241MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dds/dds.h b/drivers/staging/iio/dds/dds.h
new file mode 100644
index 00000000000..d8ac3a93baf
--- /dev/null
+++ b/drivers/staging/iio/dds/dds.h
@@ -0,0 +1,110 @@
1/*
2 * dds.h - sysfs attributes associated with DDS devices
3 *
4 * Copyright (c) 2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9/**
10 * /sys/bus/iio/devices/.../ddsX_freqY
11 */
12
13#define IIO_DEV_ATTR_FREQ(_channel, _num, _mode, _show, _store, _addr) \
14 IIO_DEVICE_ATTR(dds##_channel##_freq##_num, \
15 _mode, _show, _store, _addr)
16
17/**
18 * /sys/bus/iio/devices/.../ddsX_freqY_scale
19 */
20
21#define IIO_CONST_ATTR_FREQ_SCALE(_channel, _string) \
22 IIO_CONST_ATTR(dds##_channel##_freq_scale, _string)
23
24/**
25 * /sys/bus/iio/devices/.../ddsX_freqsymbol
26 */
27
28#define IIO_DEV_ATTR_FREQSYMBOL(_channel, _mode, _show, _store, _addr) \
29 IIO_DEVICE_ATTR(dds##_channel##_freqsymbol, \
30 _mode, _show, _store, _addr);
31
32/**
33 * /sys/bus/iio/devices/.../ddsX_phaseY
34 */
35
36#define IIO_DEV_ATTR_PHASE(_channel, _num, _mode, _show, _store, _addr) \
37 IIO_DEVICE_ATTR(dds##_channel##_phase##_num, \
38 _mode, _show, _store, _addr)
39
40/**
41 * /sys/bus/iio/devices/.../ddsX_phaseY_scale
42 */
43
44#define IIO_CONST_ATTR_PHASE_SCALE(_channel, _string) \
45 IIO_CONST_ATTR(dds##_channel##_phase_scale, _string)
46
47/**
48 * /sys/bus/iio/devices/.../ddsX_phasesymbol
49 */
50
51#define IIO_DEV_ATTR_PHASESYMBOL(_channel, _mode, _show, _store, _addr) \
52 IIO_DEVICE_ATTR(dds##_channel##_phasesymbol, \
53 _mode, _show, _store, _addr);
54
55/**
56 * /sys/bus/iio/devices/.../ddsX_pincontrol_en
57 */
58
59#define IIO_DEV_ATTR_PINCONTROL_EN(_channel, _mode, _show, _store, _addr)\
60 IIO_DEVICE_ATTR(dds##_channel##_pincontrol_en, \
61 _mode, _show, _store, _addr);
62
63/**
64 * /sys/bus/iio/devices/.../ddsX_pincontrol_freq_en
65 */
66
67#define IIO_DEV_ATTR_PINCONTROL_FREQ_EN(_channel, _mode, _show, _store, _addr)\
68 IIO_DEVICE_ATTR(dds##_channel##_pincontrol_freq_en, \
69 _mode, _show, _store, _addr);
70
71/**
72 * /sys/bus/iio/devices/.../ddsX_pincontrol_phase_en
73 */
74
75#define IIO_DEV_ATTR_PINCONTROL_PHASE_EN(_channel, _mode, _show, _store, _addr)\
76 IIO_DEVICE_ATTR(dds##_channel##_pincontrol_phase_en, \
77 _mode, _show, _store, _addr);
78
79/**
80 * /sys/bus/iio/devices/.../ddsX_out_enable
81 */
82
83#define IIO_DEV_ATTR_OUT_ENABLE(_channel, _mode, _show, _store, _addr) \
84 IIO_DEVICE_ATTR(dds##_channel##_out_enable, \
85 _mode, _show, _store, _addr);
86
87/**
88 * /sys/bus/iio/devices/.../ddsX_outY_enable
89 */
90
91#define IIO_DEV_ATTR_OUTY_ENABLE(_channel, _output, \
92 _mode, _show, _store, _addr) \
93 IIO_DEVICE_ATTR(dds##_channel##_out##_output##_enable, \
94 _mode, _show, _store, _addr);
95
96/**
97 * /sys/bus/iio/devices/.../ddsX_outY_wavetype
98 */
99
100#define IIO_DEV_ATTR_OUT_WAVETYPE(_channel, _output, _store, _addr) \
101 IIO_DEVICE_ATTR(dds##_channel##_out##_output##_wavetype, \
102 S_IWUSR, NULL, _store, _addr);
103
104/**
105 * /sys/bus/iio/devices/.../ddsX_outY_wavetype_available
106 */
107
108#define IIO_CONST_ATTR_OUT_WAVETYPES_AVAILABLE(_channel, _output, _modes)\
109 IIO_CONST_ATTR(dds##_channel##_out##_output##_wavetype_available,\
110 _modes);
diff --git a/drivers/staging/iio/gyro/adis16260_ring.c b/drivers/staging/iio/gyro/adis16260_ring.c
new file mode 100644
index 00000000000..a4df8b32251
--- /dev/null
+++ b/drivers/staging/iio/gyro/adis16260_ring.c
@@ -0,0 +1,155 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/gpio.h>
4#include <linux/workqueue.h>
5#include <linux/mutex.h>
6#include <linux/device.h>
7#include <linux/kernel.h>
8#include <linux/spi/spi.h>
9#include <linux/slab.h>
10#include <linux/sysfs.h>
11#include <linux/list.h>
12
13#include "../iio.h"
14#include "../sysfs.h"
15#include "../ring_sw.h"
16#include "../accel/accel.h"
17#include "../trigger.h"
18#include "adis16260.h"
19
20/**
21 * adis16260_read_ring_data() read data registers which will be placed into ring
22 * @dev: device associated with child of actual device (iio_dev or iio_trig)
23 * @rx: somewhere to pass back the value read
24 **/
25static int adis16260_read_ring_data(struct device *dev, u8 *rx)
26{
27 struct spi_message msg;
28 struct iio_dev *indio_dev = dev_get_drvdata(dev);
29 struct adis16260_state *st = iio_priv(indio_dev);
30 struct spi_transfer xfers[ADIS16260_OUTPUTS + 1];
31 int ret;
32 int i;
33
34 mutex_lock(&st->buf_lock);
35
36 spi_message_init(&msg);
37
38 memset(xfers, 0, sizeof(xfers));
39 for (i = 0; i <= ADIS16260_OUTPUTS; i++) {
40 xfers[i].bits_per_word = 8;
41 xfers[i].cs_change = 1;
42 xfers[i].len = 2;
43 xfers[i].delay_usecs = 30;
44 xfers[i].tx_buf = st->tx + 2 * i;
45 if (i < 2) /* SUPPLY_OUT:0x02 GYRO_OUT:0x04 */
46 st->tx[2 * i]
47 = ADIS16260_READ_REG(ADIS16260_SUPPLY_OUT
48 + 2 * i);
49 else /* 0x06 to 0x09 is reserved */
50 st->tx[2 * i]
51 = ADIS16260_READ_REG(ADIS16260_SUPPLY_OUT
52 + 2 * i + 4);
53 st->tx[2 * i + 1] = 0;
54 if (i >= 1)
55 xfers[i].rx_buf = rx + 2 * (i - 1);
56 spi_message_add_tail(&xfers[i], &msg);
57 }
58
59 ret = spi_sync(st->us, &msg);
60 if (ret)
61 dev_err(&st->us->dev, "problem when burst reading");
62
63 mutex_unlock(&st->buf_lock);
64
65 return ret;
66}
67
68static irqreturn_t adis16260_trigger_handler(int irq, void *p)
69{
70 struct iio_poll_func *pf = p;
71 struct iio_dev *indio_dev = pf->private_data;
72 struct adis16260_state *st = iio_priv(indio_dev);
73 struct iio_ring_buffer *ring = indio_dev->ring;
74 int i = 0;
75 s16 *data;
76 size_t datasize = ring->access->get_bytes_per_datum(ring);
77
78 data = kmalloc(datasize , GFP_KERNEL);
79 if (data == NULL) {
80 dev_err(&st->us->dev, "memory alloc failed in ring bh");
81 return -ENOMEM;
82 }
83
84 if (ring->scan_count &&
85 adis16260_read_ring_data(&indio_dev->dev, st->rx) >= 0)
86 for (; i < ring->scan_count; i++)
87 data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
88
89 /* Guaranteed to be aligned with 8 byte boundary */
90 if (ring->scan_timestamp)
91 *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
92
93 ring->access->store_to(ring, (u8 *)data, pf->timestamp);
94
95 iio_trigger_notify_done(indio_dev->trig);
96 kfree(data);
97
98 return IRQ_HANDLED;
99}
100
101void adis16260_unconfigure_ring(struct iio_dev *indio_dev)
102{
103 iio_dealloc_pollfunc(indio_dev->pollfunc);
104 iio_sw_rb_free(indio_dev->ring);
105}
106
107static const struct iio_ring_setup_ops adis16260_ring_setup_ops = {
108 .preenable = &iio_sw_ring_preenable,
109 .postenable = &iio_triggered_ring_postenable,
110 .predisable = &iio_triggered_ring_predisable,
111};
112
113int adis16260_configure_ring(struct iio_dev *indio_dev)
114{
115 int ret = 0;
116 struct iio_ring_buffer *ring;
117
118 ring = iio_sw_rb_allocate(indio_dev);
119 if (!ring) {
120 ret = -ENOMEM;
121 return ret;
122 }
123 indio_dev->ring = ring;
124 /* Effectively select the ring buffer implementation */
125 ring->access = &ring_sw_access_funcs;
126 ring->bpe = 2;
127 ring->scan_timestamp = true;
128 ring->setup_ops = &adis16260_ring_setup_ops;
129 ring->owner = THIS_MODULE;
130
131 /* Set default scan mode */
132 iio_scan_mask_set(ring, ADIS16260_SCAN_SUPPLY);
133 iio_scan_mask_set(ring, ADIS16260_SCAN_GYRO);
134 iio_scan_mask_set(ring, ADIS16260_SCAN_AUX_ADC);
135 iio_scan_mask_set(ring, ADIS16260_SCAN_TEMP);
136 iio_scan_mask_set(ring, ADIS16260_SCAN_ANGL);
137
138 indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
139 &adis16260_trigger_handler,
140 IRQF_ONESHOT,
141 indio_dev,
142 "adis16260_consumer%d",
143 indio_dev->id);
144 if (indio_dev->pollfunc == NULL) {
145 ret = -ENOMEM;
146 goto error_iio_sw_rb_free;
147 }
148
149 indio_dev->modes |= INDIO_RING_TRIGGERED;
150 return 0;
151
152error_iio_sw_rb_free:
153 iio_sw_rb_free(indio_dev->ring);
154 return ret;
155}
diff --git a/drivers/staging/iio/gyro/adis16260_trigger.c b/drivers/staging/iio/gyro/adis16260_trigger.c
new file mode 100644
index 00000000000..01094d0e714
--- /dev/null
+++ b/drivers/staging/iio/gyro/adis16260_trigger.c
@@ -0,0 +1,76 @@
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3#include <linux/mutex.h>
4#include <linux/device.h>
5#include <linux/kernel.h>
6#include <linux/sysfs.h>
7#include <linux/list.h>
8#include <linux/spi/spi.h>
9
10#include "../iio.h"
11#include "../sysfs.h"
12#include "../trigger.h"
13#include "adis16260.h"
14
15/**
16 * adis16260_data_rdy_trigger_set_state() set datardy interrupt state
17 **/
18static int adis16260_data_rdy_trigger_set_state(struct iio_trigger *trig,
19 bool state)
20{
21 struct iio_dev *indio_dev = trig->private_data;
22
23 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
24 return adis16260_set_irq(indio_dev, state);
25}
26
27int adis16260_probe_trigger(struct iio_dev *indio_dev)
28{
29 int ret;
30 struct adis16260_state *st = iio_priv(indio_dev);
31
32 st->trig = iio_allocate_trigger("%s-dev%d",
33 spi_get_device_id(st->us)->name,
34 indio_dev->id);
35 if (st->trig == NULL) {
36 ret = -ENOMEM;
37 goto error_ret;
38 }
39
40 ret = request_irq(st->us->irq,
41 &iio_trigger_generic_data_rdy_poll,
42 IRQF_TRIGGER_RISING,
43 "adis16260",
44 st->trig);
45 if (ret)
46 goto error_free_trig;
47
48 st->trig->dev.parent = &st->us->dev;
49 st->trig->owner = THIS_MODULE;
50 st->trig->private_data = indio_dev;
51 st->trig->set_trigger_state = &adis16260_data_rdy_trigger_set_state;
52 ret = iio_trigger_register(st->trig);
53
54 /* select default trigger */
55 indio_dev->trig = st->trig;
56 if (ret)
57 goto error_free_irq;
58
59 return 0;
60
61error_free_irq:
62 free_irq(st->us->irq, st->trig);
63error_free_trig:
64 iio_free_trigger(st->trig);
65error_ret:
66 return ret;
67}
68
69void adis16260_remove_trigger(struct iio_dev *indio_dev)
70{
71 struct adis16260_state *st = iio_priv(indio_dev);
72
73 iio_trigger_unregister(st->trig);
74 free_irq(st->us->irq, st->trig);
75 iio_free_trigger(st->trig);
76}
diff --git a/drivers/staging/iio/gyro/gyro.h b/drivers/staging/iio/gyro/gyro.h
new file mode 100644
index 00000000000..b5495613407
--- /dev/null
+++ b/drivers/staging/iio/gyro/gyro.h
@@ -0,0 +1,85 @@
1
2#include "../sysfs.h"
3
4/* Gyroscope types of attribute */
5
6#define IIO_CONST_ATTR_GYRO_OFFSET(_string) \
7 IIO_CONST_ATTR(gyro_offset, _string)
8
9#define IIO_DEV_ATTR_GYRO_OFFSET(_mode, _show, _store, _addr) \
10 IIO_DEVICE_ATTR(gyro_offset, _mode, _show, _store, _addr)
11
12#define IIO_DEV_ATTR_GYRO_X_OFFSET(_mode, _show, _store, _addr) \
13 IIO_DEVICE_ATTR(gyro_x_offset, _mode, _show, _store, _addr)
14
15#define IIO_DEV_ATTR_GYRO_Y_OFFSET(_mode, _show, _store, _addr) \
16 IIO_DEVICE_ATTR(gyro_y_offset, _mode, _show, _store, _addr)
17
18#define IIO_DEV_ATTR_GYRO_Z_OFFSET(_mode, _show, _store, _addr) \
19 IIO_DEVICE_ATTR(gyro_z_offset, _mode, _show, _store, _addr)
20
21#define IIO_CONST_ATTR_GYRO_SCALE(_string) \
22 IIO_CONST_ATTR(gyro_scale, _string)
23
24#define IIO_DEV_ATTR_GYRO_SCALE(_mode, _show, _store, _addr) \
25 IIO_DEVICE_ATTR(gyro_scale, S_IRUGO, _show, _store, _addr)
26
27#define IIO_DEV_ATTR_GYRO_X_SCALE(_mode, _show, _store, _addr) \
28 IIO_DEVICE_ATTR(gyro_x_scale, _mode, _show, _store, _addr)
29
30#define IIO_DEV_ATTR_GYRO_Y_SCALE(_mode, _show, _store, _addr) \
31 IIO_DEVICE_ATTR(gyro_y_scale, _mode, _show, _store, _addr)
32
33#define IIO_DEV_ATTR_GYRO_Z_SCALE(_mode, _show, _store, _addr) \
34 IIO_DEVICE_ATTR(gyro_z_scale, _mode, _show, _store, _addr)
35
36#define IIO_DEV_ATTR_GYRO_CALIBBIAS(_mode, _show, _store, _addr) \
37 IIO_DEVICE_ATTR(gyro_calibbias, S_IRUGO, _show, _store, _addr)
38
39#define IIO_DEV_ATTR_GYRO_X_CALIBBIAS(_mode, _show, _store, _addr) \
40 IIO_DEVICE_ATTR(gyro_x_calibbias, _mode, _show, _store, _addr)
41
42#define IIO_DEV_ATTR_GYRO_Y_CALIBBIAS(_mode, _show, _store, _addr) \
43 IIO_DEVICE_ATTR(gyro_y_calibbias, _mode, _show, _store, _addr)
44
45#define IIO_DEV_ATTR_GYRO_Z_CALIBBIAS(_mode, _show, _store, _addr) \
46 IIO_DEVICE_ATTR(gyro_z_calibbias, _mode, _show, _store, _addr)
47
48#define IIO_DEV_ATTR_GYRO_CALIBSCALE(_mode, _show, _store, _addr) \
49 IIO_DEVICE_ATTR(gyro_calibscale, S_IRUGO, _show, _store, _addr)
50
51#define IIO_DEV_ATTR_GYRO_X_CALIBSCALE(_mode, _show, _store, _addr) \
52 IIO_DEVICE_ATTR(gyro_x_calibscale, _mode, _show, _store, _addr)
53
54#define IIO_DEV_ATTR_GYRO_Y_CALIBSCALE(_mode, _show, _store, _addr) \
55 IIO_DEVICE_ATTR(gyro_y_calibscale, _mode, _show, _store, _addr)
56
57#define IIO_DEV_ATTR_GYRO_Z_CALIBSCALE(_mode, _show, _store, _addr) \
58 IIO_DEVICE_ATTR(gyro_z_calibscale, _mode, _show, _store, _addr)
59
60#define IIO_DEV_ATTR_GYRO_Z_QUADRATURE_CORRECTION(_show, _addr) \
61 IIO_DEVICE_ATTR(gyro_z_quadrature_correction_raw, S_IRUGO, _show, NULL, _addr)
62
63#define IIO_DEV_ATTR_GYRO(_show, _addr) \
64 IIO_DEVICE_ATTR(gyro_raw, S_IRUGO, _show, NULL, _addr)
65
66#define IIO_DEV_ATTR_GYRO_X(_show, _addr) \
67 IIO_DEVICE_ATTR(gyro_x_raw, S_IRUGO, _show, NULL, _addr)
68
69#define IIO_DEV_ATTR_GYRO_Y(_show, _addr) \
70 IIO_DEVICE_ATTR(gyro_y_raw, S_IRUGO, _show, NULL, _addr)
71
72#define IIO_DEV_ATTR_GYRO_Z(_show, _addr) \
73 IIO_DEVICE_ATTR(gyro_z_raw, S_IRUGO, _show, NULL, _addr)
74
75#define IIO_DEV_ATTR_ANGL(_show, _addr) \
76 IIO_DEVICE_ATTR(angl_raw, S_IRUGO, _show, NULL, _addr)
77
78#define IIO_DEV_ATTR_ANGL_X(_show, _addr) \
79 IIO_DEVICE_ATTR(angl_x_raw, S_IRUGO, _show, NULL, _addr)
80
81#define IIO_DEV_ATTR_ANGL_Y(_show, _addr) \
82 IIO_DEVICE_ATTR(angl_y_raw, S_IRUGO, _show, NULL, _addr)
83
84#define IIO_DEV_ATTR_ANGL_Z(_show, _addr) \
85 IIO_DEVICE_ATTR(angl_z_raw, S_IRUGO, _show, NULL, _addr)
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
new file mode 100644
index 00000000000..7a6ce4d0fb7
--- /dev/null
+++ b/drivers/staging/iio/iio.h
@@ -0,0 +1,439 @@
1/* The industrial I/O core
2 *
3 * Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 */
9
10#ifndef _INDUSTRIAL_IO_H_
11#define _INDUSTRIAL_IO_H_
12
13#include <linux/device.h>
14#include <linux/cdev.h>
15#include <linux/irq.h>
16#include "sysfs.h"
17#include "chrdev.h"
18
19/* IIO TODO LIST */
20/*
21 * Provide means of adjusting timer accuracy.
22 * Currently assumes nano seconds.
23 */
24
25/* Event interface flags */
26#define IIO_BUSY_BIT_POS 1
27
28/* naughty temporary hack to match these against the event version
29 - need to flattern these together */
30enum iio_chan_type {
31 /* real channel types */
32 IIO_IN,
33 IIO_OUT,
34 IIO_CURRENT,
35 IIO_POWER,
36 IIO_ACCEL,
37 IIO_IN_DIFF,
38 IIO_GYRO,
39 IIO_MAGN,
40 IIO_LIGHT,
41 IIO_INTENSITY,
42 IIO_PROXIMITY,
43 IIO_TEMP,
44 IIO_INCLI,
45 IIO_ROT,
46 IIO_ANGL,
47 IIO_TIMESTAMP,
48};
49
50#define IIO_MOD_X 0
51#define IIO_MOD_LIGHT_BOTH 0
52#define IIO_MOD_Y 1
53#define IIO_MOD_LIGHT_IR 1
54#define IIO_MOD_Z 2
55#define IIO_MOD_X_AND_Y 3
56#define IIO_MOD_X_ANX_Z 4
57#define IIO_MOD_Y_AND_Z 5
58#define IIO_MOD_X_AND_Y_AND_Z 6
59#define IIO_MOD_X_OR_Y 7
60#define IIO_MOD_X_OR_Z 8
61#define IIO_MOD_Y_OR_Z 9
62#define IIO_MOD_X_OR_Y_OR_Z 10
63
64/* Could add the raw attributes as well - allowing buffer only devices */
65enum iio_chan_info_enum {
66 IIO_CHAN_INFO_SCALE_SHARED,
67 IIO_CHAN_INFO_SCALE_SEPARATE,
68 IIO_CHAN_INFO_OFFSET_SHARED,
69 IIO_CHAN_INFO_OFFSET_SEPARATE,
70 IIO_CHAN_INFO_CALIBSCALE_SHARED,
71 IIO_CHAN_INFO_CALIBSCALE_SEPARATE,
72 IIO_CHAN_INFO_CALIBBIAS_SHARED,
73 IIO_CHAN_INFO_CALIBBIAS_SEPARATE,
74 IIO_CHAN_INFO_PEAK_SHARED,
75 IIO_CHAN_INFO_PEAK_SEPARATE,
76 IIO_CHAN_INFO_PEAK_SCALE_SHARED,
77 IIO_CHAN_INFO_PEAK_SCALE_SEPARATE,
78};
79
80/**
81 * struct iio_chan_spec - specification of a single channel
82 * @type: What type of measurement is the channel making.
83 * @channel: What number or name do we wish to asign the channel.
84 * @channel2: If there is a second number for a differential
85 * channel then this is it. If modified is set then the
86 * value here specifies the modifier.
87 * @address: Driver specific identifier.
88 * @scan_index: Monotonic index to give ordering in scans when read
89 * from a buffer.
90 * @scan_type: Sign: 's' or 'u' to specify signed or unsigned
91 * realbits: Number of valid bits of data
92 * storage_bits: Realbits + padding
93 * shift: Shift right by this before masking out
94 * realbits.
95 * @info_mask: What information is to be exported about this channel.
96 * This includes calibbias, scale etc.
97 * @event_mask: What events can this channel produce.
98 * @extend_name: Allows labeling of channel attributes with an
99 * informative name. Note this has no effect codes etc,
100 * unlike modifiers.
101 * @processed_val: Flag to specify the data access attribute should be
102 * *_input rather than *_raw.
103 * @modified: Does a modifier apply to this channel. What these are
104 * depends on the channel type. Modifier is set in
105 * channel2. Examples are IIO_MOD_X for axial sensors about
106 * the 'x' axis.
107 * @indexed: Specify the channel has a numerical index. If not,
108 * the value in channel will be suppressed for attribute
109 * but not for event codes. Typically set it to 0 when
110 * the index is false.
111 */
112struct iio_chan_spec {
113 enum iio_chan_type type;
114 int channel;
115 int channel2;
116 unsigned long address;
117 int scan_index;
118 struct {
119 char sign;
120 u8 realbits;
121 u8 storagebits;
122 u8 shift;
123 } scan_type;
124 const long info_mask;
125 const long event_mask;
126 const char *extend_name;
127 unsigned processed_val:1;
128 unsigned modified:1;
129 unsigned indexed:1;
130};
131/* Meant for internal use only */
132void __iio_device_attr_deinit(struct device_attribute *dev_attr);
133int __iio_device_attr_init(struct device_attribute *dev_attr,
134 const char *postfix,
135 struct iio_chan_spec const *chan,
136 ssize_t (*readfunc)(struct device *dev,
137 struct device_attribute *attr,
138 char *buf),
139 ssize_t (*writefunc)(struct device *dev,
140 struct device_attribute *attr,
141 const char *buf,
142 size_t len),
143 bool generic);
144#define IIO_ST(si, rb, sb, sh) \
145 { .sign = si, .realbits = rb, .storagebits = sb, .shift = sh }
146
147#define IIO_CHAN(_type, _mod, _indexed, _proc, _name, _chan, _chan2, \
148 _inf_mask, _address, _si, _stype, _event_mask) \
149 { .type = _type, \
150 .modified = _mod, \
151 .indexed = _indexed, \
152 .processed_val = _proc, \
153 .extend_name = _name, \
154 .channel = _chan, \
155 .channel2 = _chan2, \
156 .info_mask = _inf_mask, \
157 .address = _address, \
158 .scan_index = _si, \
159 .scan_type = _stype, \
160 .event_mask = _event_mask }
161
162#define IIO_CHAN_SOFT_TIMESTAMP(_si) \
163 { .type = IIO_TIMESTAMP, .channel = -1, \
164 .scan_index = _si, .scan_type = IIO_ST('s', 64, 64, 0) }
165
166int __iio_add_chan_devattr(const char *postfix,
167 const char *group,
168 struct iio_chan_spec const *chan,
169 ssize_t (*func)(struct device *dev,
170 struct device_attribute *attr,
171 char *buf),
172 ssize_t (*writefunc)(struct device *dev,
173 struct device_attribute *attr,
174 const char *buf,
175 size_t len),
176 int mask,
177 bool generic,
178 struct device *dev,
179 struct list_head *attr_list);
180/**
181 * iio_get_time_ns() - utility function to get a time stamp for events etc
182 **/
183static inline s64 iio_get_time_ns(void)
184{
185 struct timespec ts;
186 /*
187 * calls getnstimeofday.
188 * If hrtimers then up to ns accurate, if not microsecond.
189 */
190 ktime_get_real_ts(&ts);
191
192 return timespec_to_ns(&ts);
193}
194
195/* Device operating modes */
196#define INDIO_DIRECT_MODE 0x01
197#define INDIO_RING_TRIGGERED 0x02
198#define INDIO_RING_HARDWARE_BUFFER 0x08
199
200#define INDIO_ALL_RING_MODES (INDIO_RING_TRIGGERED | INDIO_RING_HARDWARE_BUFFER)
201
202/* Vast majority of this is set by the industrialio subsystem on a
203 * call to iio_device_register. */
204#define IIO_VAL_INT 1
205#define IIO_VAL_INT_PLUS_MICRO 2
206#define IIO_VAL_INT_PLUS_NANO 3
207
208struct iio_trigger; /* forward declaration */
209
210/**
211 * struct iio_info - constant information about device
212 * @driver_module: module structure used to ensure correct
213 * ownership of chrdevs etc
214 * @num_interrupt_lines:number of physical interrupt lines from device
215 * @event_attrs: event control attributes
216 * @attrs: general purpose device attributes
217 * @read_raw: function to request a value from the device.
218 * mask specifies which value. Note 0 means a reading of
219 * the channel in question. Return value will specify the
220 * type of value returned by the device. val and val2 will
221 * contain the elements making up the returned value.
222 * @write_raw: function to write a value to the device.
223 * Parameters are the same as for read_raw.
224 * @write_raw_get_fmt: callback function to query the expected
225 * format/precision. If not set by the driver, write_raw
226 * returns IIO_VAL_INT_PLUS_MICRO.
227 * @read_event_config: find out if the event is enabled.
228 * @write_event_config: set if the event is enabled.
229 * @read_event_value: read a value associated with the event. Meaning
230 * is event dependant. event_code specifies which event.
231 * @write_event_value: write the value associate with the event.
232 * Meaning is event dependent.
233 * @validate_trigger: function to validate the trigger when the
234 * current trigger gets changed.
235 **/
236struct iio_info {
237 struct module *driver_module;
238 int num_interrupt_lines;
239 struct attribute_group *event_attrs;
240 const struct attribute_group *attrs;
241
242 int (*read_raw)(struct iio_dev *indio_dev,
243 struct iio_chan_spec const *chan,
244 int *val,
245 int *val2,
246 long mask);
247
248 int (*write_raw)(struct iio_dev *indio_dev,
249 struct iio_chan_spec const *chan,
250 int val,
251 int val2,
252 long mask);
253
254 int (*write_raw_get_fmt)(struct iio_dev *indio_dev,
255 struct iio_chan_spec const *chan,
256 long mask);
257
258 int (*read_event_config)(struct iio_dev *indio_dev,
259 int event_code);
260
261 int (*write_event_config)(struct iio_dev *indio_dev,
262 int event_code,
263 int state);
264
265 int (*read_event_value)(struct iio_dev *indio_dev,
266 int event_code,
267 int *val);
268 int (*write_event_value)(struct iio_dev *indio_dev,
269 int event_code,
270 int val);
271 int (*validate_trigger)(struct iio_dev *indio_dev,
272 struct iio_trigger *trig);
273
274};
275
276/**
277 * struct iio_dev - industrial I/O device
278 * @id: [INTERN] used to identify device internally
279 * @dev_data: [DRIVER] device specific data
280 * @modes: [DRIVER] operating modes supported by device
281 * @currentmode: [DRIVER] current operating mode
282 * @dev: [DRIVER] device structure, should be assigned a parent
283 * and owner
284 * @event_interfaces: [INTERN] event chrdevs associated with interrupt lines
285 * @ring: [DRIVER] any ring buffer present
286 * @mlock: [INTERN] lock used to prevent simultaneous device state
287 * changes
288 * @available_scan_masks: [DRIVER] optional array of allowed bitmasks
289 * @trig: [INTERN] current device trigger (ring buffer modes)
290 * @pollfunc: [DRIVER] function run on trigger being received
291 * @channels: [DRIVER] channel specification structure table
292 * @num_channels: [DRIVER] number of chanels specified in @channels.
293 * @channel_attr_list: [INTERN] keep track of automatically created channel
294 * attributes.
295 * @name: [DRIVER] name of the device.
296 **/
297struct iio_dev {
298 int id;
299 void *dev_data;
300 int modes;
301 int currentmode;
302 struct device dev;
303
304 struct iio_event_interface *event_interfaces;
305
306 struct iio_ring_buffer *ring;
307 struct mutex mlock;
308
309 u32 *available_scan_masks;
310 struct iio_trigger *trig;
311 struct iio_poll_func *pollfunc;
312
313 struct iio_chan_spec const *channels;
314 int num_channels;
315
316 struct list_head channel_attr_list;
317 const char *name;
318 const struct iio_info *info;
319};
320
321/**
322 * iio_device_register() - register a device with the IIO subsystem
323 * @dev_info: Device structure filled by the device driver
324 **/
325int iio_device_register(struct iio_dev *dev_info);
326
327/**
328 * iio_device_unregister() - unregister a device from the IIO subsystem
329 * @dev_info: Device structure representing the device.
330 **/
331void iio_device_unregister(struct iio_dev *dev_info);
332
333/**
334 * iio_push_event() - try to add event to the list for userspace reading
335 * @dev_info: IIO device structure
336 * @ev_line: Which event line (hardware interrupt)
337 * @ev_code: What event
338 * @timestamp: When the event occurred
339 **/
340int iio_push_event(struct iio_dev *dev_info,
341 int ev_line,
342 int ev_code,
343 s64 timestamp);
344
345/* Used to distinguish between bipolar and unipolar scan elemenents.
346 * Whilst this may seem obvious, we may well want to change the representation
347 * in the future!*/
348#define IIO_SIGNED(a) -(a)
349#define IIO_UNSIGNED(a) (a)
350
351extern dev_t iio_devt;
352extern struct bus_type iio_bus_type;
353
354/**
355 * iio_put_device() - reference counted deallocation of struct device
356 * @dev: the iio_device containing the device
357 **/
358static inline void iio_put_device(struct iio_dev *dev)
359{
360 if (dev)
361 put_device(&dev->dev);
362};
363
364/**
365 * to_iio_dev() - get iio_dev for which we have the struct device
366 * @d: the struct device
367 **/
368static inline struct iio_dev *to_iio_dev(struct device *d)
369{
370 return container_of(d, struct iio_dev, dev);
371};
372
373/**
374 * iio_dev_get_devdata() - helper function gets device specific data
375 * @d: the iio_dev associated with the device
376 **/
377static inline void *iio_dev_get_devdata(struct iio_dev *d)
378{
379 return d->dev_data;
380}
381
382
383/* Can we make this smaller? */
384#define IIO_ALIGN L1_CACHE_BYTES
385/**
386 * iio_allocate_device() - allocate an iio_dev from a driver
387 * @sizeof_priv: Space to allocate for private structure.
388 **/
389struct iio_dev *iio_allocate_device(int sizeof_priv);
390
391static inline void *iio_priv(const struct iio_dev *dev)
392{
393 return (char *)dev + ALIGN(sizeof(struct iio_dev), IIO_ALIGN);
394}
395
396static inline struct iio_dev *iio_priv_to_dev(void *priv)
397{
398 return (struct iio_dev *)((char *)priv -
399 ALIGN(sizeof(struct iio_dev), IIO_ALIGN));
400}
401
402/**
403 * iio_free_device() - free an iio_dev from a driver
404 * @dev: the iio_dev associated with the device
405 **/
406void iio_free_device(struct iio_dev *dev);
407
408/**
409 * iio_put() - internal module reference count reduce
410 **/
411void iio_put(void);
412
413/**
414 * iio_get() - internal module reference count increase
415 **/
416void iio_get(void);
417
418/**
419 * iio_device_get_chrdev_minor() - get an unused minor number
420 **/
421int iio_device_get_chrdev_minor(void);
422void iio_device_free_chrdev_minor(int val);
423
424/**
425 * iio_ring_enabled() - helper function to test if any form of ring is enabled
426 * @dev_info: IIO device info structure for device
427 **/
428static inline bool iio_ring_enabled(struct iio_dev *dev_info)
429{
430 return dev_info->currentmode
431 & (INDIO_RING_TRIGGERED
432 | INDIO_RING_HARDWARE_BUFFER);
433};
434
435struct ida;
436
437int iio_get_new_ida_val(struct ida *this_ida);
438void iio_free_ida_val(struct ida *this_ida, int id);
439#endif /* _INDUSTRIAL_IO_H_ */
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
new file mode 100644
index 00000000000..19819e7578c
--- /dev/null
+++ b/drivers/staging/iio/industrialio-core.c
@@ -0,0 +1,1245 @@
1/* The industrial I/O core
2 *
3 * Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * Based on elements of hwmon and input subsystems.
10 */
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/idr.h>
15#include <linux/kdev_t.h>
16#include <linux/err.h>
17#include <linux/device.h>
18#include <linux/fs.h>
19#include <linux/poll.h>
20#include <linux/sched.h>
21#include <linux/wait.h>
22#include <linux/cdev.h>
23#include <linux/slab.h>
24#include "iio.h"
25#include "trigger_consumer.h"
26
27#define IIO_ID_PREFIX "device"
28#define IIO_ID_FORMAT IIO_ID_PREFIX "%d"
29
30/* IDR to assign each registered device a unique id*/
31static DEFINE_IDA(iio_ida);
32/* IDR to allocate character device minor numbers */
33static DEFINE_IDA(iio_chrdev_ida);
34/* Lock used to protect both of the above */
35static DEFINE_SPINLOCK(iio_ida_lock);
36
37dev_t iio_devt;
38EXPORT_SYMBOL(iio_devt);
39
40#define IIO_DEV_MAX 256
41struct bus_type iio_bus_type = {
42 .name = "iio",
43};
44EXPORT_SYMBOL(iio_bus_type);
45
46static const char * const iio_chan_type_name_spec_shared[] = {
47 [IIO_IN] = "in",
48 [IIO_OUT] = "out",
49 [IIO_CURRENT] = "current",
50 [IIO_POWER] = "power",
51 [IIO_ACCEL] = "accel",
52 [IIO_IN_DIFF] = "in-in",
53 [IIO_GYRO] = "gyro",
54 [IIO_MAGN] = "magn",
55 [IIO_LIGHT] = "illuminance",
56 [IIO_INTENSITY] = "intensity",
57 [IIO_PROXIMITY] = "proximity",
58 [IIO_TEMP] = "temp",
59 [IIO_INCLI] = "incli",
60 [IIO_ROT] = "rot",
61 [IIO_ANGL] = "angl",
62 [IIO_TIMESTAMP] = "timestamp",
63};
64
65static const char * const iio_chan_type_name_spec_complex[] = {
66 [IIO_IN_DIFF] = "in%d-in%d",
67};
68
69static const char * const iio_modifier_names_light[] = {
70 [IIO_MOD_LIGHT_BOTH] = "both",
71 [IIO_MOD_LIGHT_IR] = "ir",
72};
73
74static const char * const iio_modifier_names_axial[] = {
75 [IIO_MOD_X] = "x",
76 [IIO_MOD_Y] = "y",
77 [IIO_MOD_Z] = "z",
78};
79
80/* relies on pairs of these shared then separate */
81static const char * const iio_chan_info_postfix[] = {
82 [IIO_CHAN_INFO_SCALE_SHARED/2] = "scale",
83 [IIO_CHAN_INFO_OFFSET_SHARED/2] = "offset",
84 [IIO_CHAN_INFO_CALIBSCALE_SHARED/2] = "calibscale",
85 [IIO_CHAN_INFO_CALIBBIAS_SHARED/2] = "calibbias",
86 [IIO_CHAN_INFO_PEAK_SHARED/2] = "peak_raw",
87 [IIO_CHAN_INFO_PEAK_SCALE_SHARED/2] = "peak_scale",
88};
89
90int iio_push_event(struct iio_dev *dev_info,
91 int ev_line,
92 int ev_code,
93 s64 timestamp)
94{
95 struct iio_event_interface *ev_int
96 = &dev_info->event_interfaces[ev_line];
97 struct iio_detected_event_list *ev;
98 int ret = 0;
99
100 /* Does anyone care? */
101 mutex_lock(&ev_int->event_list_lock);
102 if (test_bit(IIO_BUSY_BIT_POS, &ev_int->handler.flags)) {
103 if (ev_int->current_events == ev_int->max_events) {
104 mutex_unlock(&ev_int->event_list_lock);
105 return 0;
106 }
107 ev = kmalloc(sizeof(*ev), GFP_KERNEL);
108 if (ev == NULL) {
109 ret = -ENOMEM;
110 mutex_unlock(&ev_int->event_list_lock);
111 goto error_ret;
112 }
113 ev->ev.id = ev_code;
114 ev->ev.timestamp = timestamp;
115
116 list_add_tail(&ev->list, &ev_int->det_events);
117 ev_int->current_events++;
118 mutex_unlock(&ev_int->event_list_lock);
119 wake_up_interruptible(&ev_int->wait);
120 } else
121 mutex_unlock(&ev_int->event_list_lock);
122
123error_ret:
124 return ret;
125}
126EXPORT_SYMBOL(iio_push_event);
127
128
129/* This turns up an awful lot */
130ssize_t iio_read_const_attr(struct device *dev,
131 struct device_attribute *attr,
132 char *buf)
133{
134 return sprintf(buf, "%s\n", to_iio_const_attr(attr)->string);
135}
136EXPORT_SYMBOL(iio_read_const_attr);
137
138
139static ssize_t iio_event_chrdev_read(struct file *filep,
140 char __user *buf,
141 size_t count,
142 loff_t *f_ps)
143{
144 struct iio_event_interface *ev_int = filep->private_data;
145 struct iio_detected_event_list *el;
146 int ret;
147 size_t len;
148
149 mutex_lock(&ev_int->event_list_lock);
150 if (list_empty(&ev_int->det_events)) {
151 if (filep->f_flags & O_NONBLOCK) {
152 ret = -EAGAIN;
153 goto error_mutex_unlock;
154 }
155 mutex_unlock(&ev_int->event_list_lock);
156 /* Blocking on device; waiting for something to be there */
157 ret = wait_event_interruptible(ev_int->wait,
158 !list_empty(&ev_int
159 ->det_events));
160 if (ret)
161 goto error_ret;
162 /* Single access device so no one else can get the data */
163 mutex_lock(&ev_int->event_list_lock);
164 }
165
166 el = list_first_entry(&ev_int->det_events,
167 struct iio_detected_event_list,
168 list);
169 len = sizeof el->ev;
170 if (copy_to_user(buf, &(el->ev), len)) {
171 ret = -EFAULT;
172 goto error_mutex_unlock;
173 }
174 list_del(&el->list);
175 ev_int->current_events--;
176 mutex_unlock(&ev_int->event_list_lock);
177 kfree(el);
178
179 return len;
180
181error_mutex_unlock:
182 mutex_unlock(&ev_int->event_list_lock);
183error_ret:
184
185 return ret;
186}
187
188static int iio_event_chrdev_release(struct inode *inode, struct file *filep)
189{
190 struct iio_handler *hand = iio_cdev_to_handler(inode->i_cdev);
191 struct iio_event_interface *ev_int = hand->private;
192 struct iio_detected_event_list *el, *t;
193
194 mutex_lock(&ev_int->event_list_lock);
195 clear_bit(IIO_BUSY_BIT_POS, &ev_int->handler.flags);
196 /*
197 * In order to maintain a clean state for reopening,
198 * clear out any awaiting events. The mask will prevent
199 * any new __iio_push_event calls running.
200 */
201 list_for_each_entry_safe(el, t, &ev_int->det_events, list) {
202 list_del(&el->list);
203 kfree(el);
204 }
205 mutex_unlock(&ev_int->event_list_lock);
206
207 return 0;
208}
209
210static int iio_event_chrdev_open(struct inode *inode, struct file *filep)
211{
212 struct iio_handler *hand = iio_cdev_to_handler(inode->i_cdev);
213 struct iio_event_interface *ev_int = hand->private;
214
215 mutex_lock(&ev_int->event_list_lock);
216 if (test_and_set_bit(IIO_BUSY_BIT_POS, &hand->flags)) {
217 fops_put(filep->f_op);
218 mutex_unlock(&ev_int->event_list_lock);
219 return -EBUSY;
220 }
221 filep->private_data = hand->private;
222 mutex_unlock(&ev_int->event_list_lock);
223
224 return 0;
225}
226
227static const struct file_operations iio_event_chrdev_fileops = {
228 .read = iio_event_chrdev_read,
229 .release = iio_event_chrdev_release,
230 .open = iio_event_chrdev_open,
231 .owner = THIS_MODULE,
232 .llseek = noop_llseek,
233};
234
235static void iio_event_dev_release(struct device *dev)
236{
237 struct iio_event_interface *ev_int
238 = container_of(dev, struct iio_event_interface, dev);
239 cdev_del(&ev_int->handler.chrdev);
240 iio_device_free_chrdev_minor(MINOR(dev->devt));
241};
242
243static struct device_type iio_event_type = {
244 .release = iio_event_dev_release,
245};
246
247int iio_device_get_chrdev_minor(void)
248{
249 int ret, val;
250
251ida_again:
252 if (unlikely(ida_pre_get(&iio_chrdev_ida, GFP_KERNEL) == 0))
253 return -ENOMEM;
254 spin_lock(&iio_ida_lock);
255 ret = ida_get_new(&iio_chrdev_ida, &val);
256 spin_unlock(&iio_ida_lock);
257 if (unlikely(ret == -EAGAIN))
258 goto ida_again;
259 else if (unlikely(ret))
260 return ret;
261 if (val > IIO_DEV_MAX)
262 return -ENOMEM;
263 return val;
264}
265
266void iio_device_free_chrdev_minor(int val)
267{
268 spin_lock(&iio_ida_lock);
269 ida_remove(&iio_chrdev_ida, val);
270 spin_unlock(&iio_ida_lock);
271}
272
273static int iio_setup_ev_int(struct iio_event_interface *ev_int,
274 const char *dev_name,
275 int index,
276 struct module *owner,
277 struct device *dev)
278{
279 int ret, minor;
280
281 ev_int->dev.bus = &iio_bus_type;
282 ev_int->dev.parent = dev;
283 ev_int->dev.type = &iio_event_type;
284 device_initialize(&ev_int->dev);
285
286 minor = iio_device_get_chrdev_minor();
287 if (minor < 0) {
288 ret = minor;
289 goto error_device_put;
290 }
291 ev_int->dev.devt = MKDEV(MAJOR(iio_devt), minor);
292 dev_set_name(&ev_int->dev, "%s:event%d", dev_name, index);
293
294 ret = device_add(&ev_int->dev);
295 if (ret)
296 goto error_free_minor;
297
298 cdev_init(&ev_int->handler.chrdev, &iio_event_chrdev_fileops);
299 ev_int->handler.chrdev.owner = owner;
300
301 mutex_init(&ev_int->event_list_lock);
302 /* discussion point - make this variable? */
303 ev_int->max_events = 10;
304 ev_int->current_events = 0;
305 INIT_LIST_HEAD(&ev_int->det_events);
306 init_waitqueue_head(&ev_int->wait);
307 ev_int->handler.private = ev_int;
308 ev_int->handler.flags = 0;
309
310 ret = cdev_add(&ev_int->handler.chrdev, ev_int->dev.devt, 1);
311 if (ret)
312 goto error_unreg_device;
313
314 return 0;
315
316error_unreg_device:
317 device_unregister(&ev_int->dev);
318error_free_minor:
319 iio_device_free_chrdev_minor(minor);
320error_device_put:
321 put_device(&ev_int->dev);
322
323 return ret;
324}
325
326static void iio_free_ev_int(struct iio_event_interface *ev_int)
327{
328 device_unregister(&ev_int->dev);
329 put_device(&ev_int->dev);
330}
331
332static int __init iio_dev_init(void)
333{
334 int err;
335
336 err = alloc_chrdev_region(&iio_devt, 0, IIO_DEV_MAX, "iio");
337 if (err < 0)
338 printk(KERN_ERR "%s: failed to allocate char dev region\n",
339 __FILE__);
340
341 return err;
342}
343
344static void __exit iio_dev_exit(void)
345{
346 if (iio_devt)
347 unregister_chrdev_region(iio_devt, IIO_DEV_MAX);
348}
349
350static int __init iio_init(void)
351{
352 int ret;
353
354 /* Register sysfs bus */
355 ret = bus_register(&iio_bus_type);
356 if (ret < 0) {
357 printk(KERN_ERR
358 "%s could not register bus type\n",
359 __FILE__);
360 goto error_nothing;
361 }
362
363 ret = iio_dev_init();
364 if (ret < 0)
365 goto error_unregister_bus_type;
366
367 return 0;
368
369error_unregister_bus_type:
370 bus_unregister(&iio_bus_type);
371error_nothing:
372 return ret;
373}
374
375static void __exit iio_exit(void)
376{
377 iio_dev_exit();
378 bus_unregister(&iio_bus_type);
379}
380
381static ssize_t iio_read_channel_info(struct device *dev,
382 struct device_attribute *attr,
383 char *buf)
384{
385 struct iio_dev *indio_dev = dev_get_drvdata(dev);
386 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
387 int val, val2;
388 int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
389 &val, &val2, this_attr->address);
390
391 if (ret < 0)
392 return ret;
393
394 if (ret == IIO_VAL_INT)
395 return sprintf(buf, "%d\n", val);
396 else if (ret == IIO_VAL_INT_PLUS_MICRO) {
397 if (val2 < 0)
398 return sprintf(buf, "-%d.%06u\n", val, -val2);
399 else
400 return sprintf(buf, "%d.%06u\n", val, val2);
401 } else if (ret == IIO_VAL_INT_PLUS_NANO) {
402 if (val2 < 0)
403 return sprintf(buf, "-%d.%09u\n", val, -val2);
404 else
405 return sprintf(buf, "%d.%09u\n", val, val2);
406 } else
407 return 0;
408}
409
410static ssize_t iio_write_channel_info(struct device *dev,
411 struct device_attribute *attr,
412 const char *buf,
413 size_t len)
414{
415 struct iio_dev *indio_dev = dev_get_drvdata(dev);
416 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
417 int ret, integer = 0, fract = 0, fract_mult = 100000;
418 bool integer_part = true, negative = false;
419
420 /* Assumes decimal - precision based on number of digits */
421 if (!indio_dev->info->write_raw)
422 return -EINVAL;
423
424 if (indio_dev->info->write_raw_get_fmt)
425 switch (indio_dev->info->write_raw_get_fmt(indio_dev,
426 this_attr->c, this_attr->address)) {
427 case IIO_VAL_INT_PLUS_MICRO:
428 fract_mult = 100000;
429 break;
430 case IIO_VAL_INT_PLUS_NANO:
431 fract_mult = 100000000;
432 break;
433 default:
434 return -EINVAL;
435 }
436
437 if (buf[0] == '-') {
438 negative = true;
439 buf++;
440 }
441
442 while (*buf) {
443 if ('0' <= *buf && *buf <= '9') {
444 if (integer_part)
445 integer = integer*10 + *buf - '0';
446 else {
447 fract += fract_mult*(*buf - '0');
448 if (fract_mult == 1)
449 break;
450 fract_mult /= 10;
451 }
452 } else if (*buf == '\n') {
453 if (*(buf + 1) == '\0')
454 break;
455 else
456 return -EINVAL;
457 } else if (*buf == '.') {
458 integer_part = false;
459 } else {
460 return -EINVAL;
461 }
462 buf++;
463 }
464 if (negative) {
465 if (integer)
466 integer = -integer;
467 else
468 fract = -fract;
469 }
470
471 ret = indio_dev->info->write_raw(indio_dev, this_attr->c,
472 integer, fract, this_attr->address);
473 if (ret)
474 return ret;
475
476 return len;
477}
478
479static int __iio_build_postfix(struct iio_chan_spec const *chan,
480 bool generic,
481 const char *postfix,
482 char **result)
483{
484 char *all_post;
485 /* 3 options - generic, extend_name, modified - if generic, extend_name
486 * and modified cannot apply.*/
487
488 if (generic || (!chan->modified && !chan->extend_name)) {
489 all_post = kasprintf(GFP_KERNEL, "%s", postfix);
490 } else if (chan->modified) {
491 const char *intermediate;
492 switch (chan->type) {
493 case IIO_INTENSITY:
494 intermediate
495 = iio_modifier_names_light[chan->channel2];
496 break;
497 case IIO_ACCEL:
498 case IIO_GYRO:
499 case IIO_MAGN:
500 case IIO_INCLI:
501 case IIO_ROT:
502 case IIO_ANGL:
503 intermediate
504 = iio_modifier_names_axial[chan->channel2];
505 break;
506 default:
507 return -EINVAL;
508 }
509 if (chan->extend_name)
510 all_post = kasprintf(GFP_KERNEL, "%s_%s_%s",
511 intermediate,
512 chan->extend_name,
513 postfix);
514 else
515 all_post = kasprintf(GFP_KERNEL, "%s_%s",
516 intermediate,
517 postfix);
518 } else
519 all_post = kasprintf(GFP_KERNEL, "%s_%s", chan->extend_name,
520 postfix);
521 if (all_post == NULL)
522 return -ENOMEM;
523 *result = all_post;
524 return 0;
525}
526
527int __iio_device_attr_init(struct device_attribute *dev_attr,
528 const char *postfix,
529 struct iio_chan_spec const *chan,
530 ssize_t (*readfunc)(struct device *dev,
531 struct device_attribute *attr,
532 char *buf),
533 ssize_t (*writefunc)(struct device *dev,
534 struct device_attribute *attr,
535 const char *buf,
536 size_t len),
537 bool generic)
538{
539 int ret;
540 char *name_format, *full_postfix;
541 sysfs_attr_init(&dev_attr->attr);
542 ret = __iio_build_postfix(chan, generic, postfix, &full_postfix);
543 if (ret)
544 goto error_ret;
545
546 /* Special case for types that uses both channel numbers in naming */
547 if (chan->type == IIO_IN_DIFF && !generic)
548 name_format
549 = kasprintf(GFP_KERNEL, "%s_%s",
550 iio_chan_type_name_spec_complex[chan->type],
551 full_postfix);
552 else if (generic || !chan->indexed)
553 name_format
554 = kasprintf(GFP_KERNEL, "%s_%s",
555 iio_chan_type_name_spec_shared[chan->type],
556 full_postfix);
557 else
558 name_format
559 = kasprintf(GFP_KERNEL, "%s%d_%s",
560 iio_chan_type_name_spec_shared[chan->type],
561 chan->channel,
562 full_postfix);
563
564 if (name_format == NULL) {
565 ret = -ENOMEM;
566 goto error_free_full_postfix;
567 }
568 dev_attr->attr.name = kasprintf(GFP_KERNEL,
569 name_format,
570 chan->channel,
571 chan->channel2);
572 if (dev_attr->attr.name == NULL) {
573 ret = -ENOMEM;
574 goto error_free_name_format;
575 }
576
577 if (readfunc) {
578 dev_attr->attr.mode |= S_IRUGO;
579 dev_attr->show = readfunc;
580 }
581
582 if (writefunc) {
583 dev_attr->attr.mode |= S_IWUSR;
584 dev_attr->store = writefunc;
585 }
586 kfree(name_format);
587 kfree(full_postfix);
588
589 return 0;
590
591error_free_name_format:
592 kfree(name_format);
593error_free_full_postfix:
594 kfree(full_postfix);
595error_ret:
596 return ret;
597}
598
599void __iio_device_attr_deinit(struct device_attribute *dev_attr)
600{
601 kfree(dev_attr->attr.name);
602}
603
604int __iio_add_chan_devattr(const char *postfix,
605 const char *group,
606 struct iio_chan_spec const *chan,
607 ssize_t (*readfunc)(struct device *dev,
608 struct device_attribute *attr,
609 char *buf),
610 ssize_t (*writefunc)(struct device *dev,
611 struct device_attribute *attr,
612 const char *buf,
613 size_t len),
614 int mask,
615 bool generic,
616 struct device *dev,
617 struct list_head *attr_list)
618{
619 int ret;
620 struct iio_dev_attr *iio_attr, *t;
621
622 iio_attr = kzalloc(sizeof *iio_attr, GFP_KERNEL);
623 if (iio_attr == NULL) {
624 ret = -ENOMEM;
625 goto error_ret;
626 }
627 ret = __iio_device_attr_init(&iio_attr->dev_attr,
628 postfix, chan,
629 readfunc, writefunc, generic);
630 if (ret)
631 goto error_iio_dev_attr_free;
632 iio_attr->c = chan;
633 iio_attr->address = mask;
634 list_for_each_entry(t, attr_list, l)
635 if (strcmp(t->dev_attr.attr.name,
636 iio_attr->dev_attr.attr.name) == 0) {
637 if (!generic)
638 dev_err(dev, "tried to double register : %s\n",
639 t->dev_attr.attr.name);
640 ret = -EBUSY;
641 goto error_device_attr_deinit;
642 }
643
644 ret = sysfs_add_file_to_group(&dev->kobj,
645 &iio_attr->dev_attr.attr, group);
646 if (ret < 0)
647 goto error_device_attr_deinit;
648
649 list_add(&iio_attr->l, attr_list);
650
651 return 0;
652
653error_device_attr_deinit:
654 __iio_device_attr_deinit(&iio_attr->dev_attr);
655error_iio_dev_attr_free:
656 kfree(iio_attr);
657error_ret:
658 return ret;
659}
660
661static int iio_device_add_channel_sysfs(struct iio_dev *dev_info,
662 struct iio_chan_spec const *chan)
663{
664 int ret, i;
665
666
667 if (chan->channel < 0)
668 return 0;
669 if (chan->processed_val)
670 ret = __iio_add_chan_devattr("input", NULL, chan,
671 &iio_read_channel_info,
672 NULL,
673 0,
674 0,
675 &dev_info->dev,
676 &dev_info->channel_attr_list);
677 else
678 ret = __iio_add_chan_devattr("raw", NULL, chan,
679 &iio_read_channel_info,
680 (chan->type == IIO_OUT ?
681 &iio_write_channel_info : NULL),
682 0,
683 0,
684 &dev_info->dev,
685 &dev_info->channel_attr_list);
686 if (ret)
687 goto error_ret;
688
689 for_each_set_bit(i, &chan->info_mask, sizeof(long)*8) {
690 ret = __iio_add_chan_devattr(iio_chan_info_postfix[i/2],
691 NULL, chan,
692 &iio_read_channel_info,
693 &iio_write_channel_info,
694 (1 << i),
695 !(i%2),
696 &dev_info->dev,
697 &dev_info->channel_attr_list);
698 if (ret == -EBUSY && (i%2 == 0)) {
699 ret = 0;
700 continue;
701 }
702 if (ret < 0)
703 goto error_ret;
704 }
705error_ret:
706 return ret;
707}
708
709static void iio_device_remove_and_free_read_attr(struct iio_dev *dev_info,
710 struct iio_dev_attr *p)
711{
712 sysfs_remove_file_from_group(&dev_info->dev.kobj,
713 &p->dev_attr.attr, NULL);
714 kfree(p->dev_attr.attr.name);
715 kfree(p);
716}
717
718static ssize_t iio_show_dev_name(struct device *dev,
719 struct device_attribute *attr,
720 char *buf)
721{
722 struct iio_dev *indio_dev = dev_get_drvdata(dev);
723 return sprintf(buf, "%s\n", indio_dev->name);
724}
725
726static DEVICE_ATTR(name, S_IRUGO, iio_show_dev_name, NULL);
727
728static int iio_device_register_sysfs(struct iio_dev *dev_info)
729{
730 int i, ret = 0;
731 struct iio_dev_attr *p, *n;
732
733 if (dev_info->info->attrs) {
734 ret = sysfs_create_group(&dev_info->dev.kobj,
735 dev_info->info->attrs);
736 if (ret) {
737 dev_err(dev_info->dev.parent,
738 "Failed to register sysfs hooks\n");
739 goto error_ret;
740 }
741 }
742
743 /*
744 * New channel registration method - relies on the fact a group does
745 * not need to be initialized if it is name is NULL.
746 */
747 INIT_LIST_HEAD(&dev_info->channel_attr_list);
748 if (dev_info->channels)
749 for (i = 0; i < dev_info->num_channels; i++) {
750 ret = iio_device_add_channel_sysfs(dev_info,
751 &dev_info
752 ->channels[i]);
753 if (ret < 0)
754 goto error_clear_attrs;
755 }
756 if (dev_info->name) {
757 ret = sysfs_add_file_to_group(&dev_info->dev.kobj,
758 &dev_attr_name.attr,
759 NULL);
760 if (ret)
761 goto error_clear_attrs;
762 }
763 return 0;
764
765error_clear_attrs:
766 list_for_each_entry_safe(p, n,
767 &dev_info->channel_attr_list, l) {
768 list_del(&p->l);
769 iio_device_remove_and_free_read_attr(dev_info, p);
770 }
771 if (dev_info->info->attrs)
772 sysfs_remove_group(&dev_info->dev.kobj, dev_info->info->attrs);
773error_ret:
774 return ret;
775
776}
777
778static void iio_device_unregister_sysfs(struct iio_dev *dev_info)
779{
780
781 struct iio_dev_attr *p, *n;
782 if (dev_info->name)
783 sysfs_remove_file_from_group(&dev_info->dev.kobj,
784 &dev_attr_name.attr,
785 NULL);
786 list_for_each_entry_safe(p, n, &dev_info->channel_attr_list, l) {
787 list_del(&p->l);
788 iio_device_remove_and_free_read_attr(dev_info, p);
789 }
790
791 if (dev_info->info->attrs)
792 sysfs_remove_group(&dev_info->dev.kobj, dev_info->info->attrs);
793}
794
795/* Return a negative errno on failure */
796int iio_get_new_ida_val(struct ida *this_ida)
797{
798 int ret;
799 int val;
800
801ida_again:
802 if (unlikely(ida_pre_get(this_ida, GFP_KERNEL) == 0))
803 return -ENOMEM;
804
805 spin_lock(&iio_ida_lock);
806 ret = ida_get_new(this_ida, &val);
807 spin_unlock(&iio_ida_lock);
808 if (unlikely(ret == -EAGAIN))
809 goto ida_again;
810 else if (unlikely(ret))
811 return ret;
812
813 return val;
814}
815EXPORT_SYMBOL(iio_get_new_ida_val);
816
817void iio_free_ida_val(struct ida *this_ida, int id)
818{
819 spin_lock(&iio_ida_lock);
820 ida_remove(this_ida, id);
821 spin_unlock(&iio_ida_lock);
822}
823EXPORT_SYMBOL(iio_free_ida_val);
824
825static const char * const iio_ev_type_text[] = {
826 [IIO_EV_TYPE_THRESH] = "thresh",
827 [IIO_EV_TYPE_MAG] = "mag",
828 [IIO_EV_TYPE_ROC] = "roc"
829};
830
831static const char * const iio_ev_dir_text[] = {
832 [IIO_EV_DIR_EITHER] = "either",
833 [IIO_EV_DIR_RISING] = "rising",
834 [IIO_EV_DIR_FALLING] = "falling"
835};
836
837static ssize_t iio_ev_state_store(struct device *dev,
838 struct device_attribute *attr,
839 const char *buf,
840 size_t len)
841{
842 struct iio_dev *indio_dev = dev_get_drvdata(dev);
843 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
844 int ret;
845 bool val;
846
847 ret = strtobool(buf, &val);
848 if (ret < 0)
849 return ret;
850
851 ret = indio_dev->info->write_event_config(indio_dev,
852 this_attr->address,
853 val);
854 return (ret < 0) ? ret : len;
855}
856
857static ssize_t iio_ev_state_show(struct device *dev,
858 struct device_attribute *attr,
859 char *buf)
860{
861 struct iio_dev *indio_dev = dev_get_drvdata(dev);
862 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
863 int val = indio_dev->info->read_event_config(indio_dev,
864 this_attr->address);
865
866 if (val < 0)
867 return val;
868 else
869 return sprintf(buf, "%d\n", val);
870}
871
872static ssize_t iio_ev_value_show(struct device *dev,
873 struct device_attribute *attr,
874 char *buf)
875{
876 struct iio_dev *indio_dev = dev_get_drvdata(dev);
877 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
878 int val, ret;
879
880 ret = indio_dev->info->read_event_value(indio_dev,
881 this_attr->address, &val);
882 if (ret < 0)
883 return ret;
884
885 return sprintf(buf, "%d\n", val);
886}
887
888static ssize_t iio_ev_value_store(struct device *dev,
889 struct device_attribute *attr,
890 const char *buf,
891 size_t len)
892{
893 struct iio_dev *indio_dev = dev_get_drvdata(dev);
894 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
895 unsigned long val;
896 int ret;
897
898 ret = strict_strtoul(buf, 10, &val);
899 if (ret)
900 return ret;
901
902 ret = indio_dev->info->write_event_value(indio_dev, this_attr->address,
903 val);
904 if (ret < 0)
905 return ret;
906
907 return len;
908}
909
910static int iio_device_add_event_sysfs(struct iio_dev *dev_info,
911 struct iio_chan_spec const *chan)
912{
913
914 int ret = 0, i, mask;
915 char *postfix;
916 if (!chan->event_mask)
917 return 0;
918
919 for_each_set_bit(i, &chan->event_mask, sizeof(chan->event_mask)*8) {
920 postfix = kasprintf(GFP_KERNEL, "%s_%s_en",
921 iio_ev_type_text[i/IIO_EV_TYPE_MAX],
922 iio_ev_dir_text[i%IIO_EV_TYPE_MAX]);
923 if (postfix == NULL) {
924 ret = -ENOMEM;
925 goto error_ret;
926 }
927 switch (chan->type) {
928 /* Switch this to a table at some point */
929 case IIO_IN:
930 mask = IIO_UNMOD_EVENT_CODE(chan->type, chan->channel,
931 i/IIO_EV_TYPE_MAX,
932 i%IIO_EV_TYPE_MAX);
933 break;
934 case IIO_ACCEL:
935 mask = IIO_MOD_EVENT_CODE(chan->type, 0, chan->channel,
936 i/IIO_EV_TYPE_MAX,
937 i%IIO_EV_TYPE_MAX);
938 break;
939 case IIO_IN_DIFF:
940 mask = IIO_MOD_EVENT_CODE(chan->type, chan->channel,
941 chan->channel2,
942 i/IIO_EV_TYPE_MAX,
943 i%IIO_EV_TYPE_MAX);
944 break;
945 default:
946 printk(KERN_INFO "currently unhandled type of event\n");
947 }
948 ret = __iio_add_chan_devattr(postfix,
949 NULL,
950 chan,
951 &iio_ev_state_show,
952 iio_ev_state_store,
953 mask,
954 /*HACK. - limits us to one
955 event interface - fix by
956 extending the bitmask - but
957 how far*/
958 0,
959 &dev_info->event_interfaces[0].dev,
960 &dev_info->event_interfaces[0].
961 dev_attr_list);
962 kfree(postfix);
963 if (ret)
964 goto error_ret;
965
966 postfix = kasprintf(GFP_KERNEL, "%s_%s_value",
967 iio_ev_type_text[i/IIO_EV_TYPE_MAX],
968 iio_ev_dir_text[i%IIO_EV_TYPE_MAX]);
969 if (postfix == NULL) {
970 ret = -ENOMEM;
971 goto error_ret;
972 }
973 ret = __iio_add_chan_devattr(postfix, NULL, chan,
974 iio_ev_value_show,
975 iio_ev_value_store,
976 mask,
977 0,
978 &dev_info->event_interfaces[0]
979 .dev,
980 &dev_info->event_interfaces[0]
981 .dev_attr_list);
982 kfree(postfix);
983 if (ret)
984 goto error_ret;
985
986 }
987
988error_ret:
989 return ret;
990}
991
992static inline void __iio_remove_all_event_sysfs(struct iio_dev *dev_info,
993 const char *groupname,
994 int num)
995{
996 struct iio_dev_attr *p, *n;
997 list_for_each_entry_safe(p, n,
998 &dev_info->event_interfaces[num].
999 dev_attr_list, l) {
1000 sysfs_remove_file_from_group(&dev_info
1001 ->event_interfaces[num].dev.kobj,
1002 &p->dev_attr.attr,
1003 groupname);
1004 kfree(p->dev_attr.attr.name);
1005 kfree(p);
1006 }
1007}
1008
1009static inline int __iio_add_event_config_attrs(struct iio_dev *dev_info, int i)
1010{
1011 int j;
1012 int ret;
1013 INIT_LIST_HEAD(&dev_info->event_interfaces[0].dev_attr_list);
1014 /* Dynically created from the channels array */
1015 if (dev_info->channels) {
1016 for (j = 0; j < dev_info->num_channels; j++) {
1017 ret = iio_device_add_event_sysfs(dev_info,
1018 &dev_info
1019 ->channels[j]);
1020 if (ret)
1021 goto error_clear_attrs;
1022 }
1023 }
1024 return 0;
1025
1026error_clear_attrs:
1027 __iio_remove_all_event_sysfs(dev_info, NULL, i);
1028
1029 return ret;
1030}
1031
1032static inline int __iio_remove_event_config_attrs(struct iio_dev *dev_info,
1033 int i)
1034{
1035 __iio_remove_all_event_sysfs(dev_info, NULL, i);
1036 return 0;
1037}
1038
1039static int iio_device_register_eventset(struct iio_dev *dev_info)
1040{
1041 int ret = 0, i, j;
1042
1043 if (dev_info->info->num_interrupt_lines == 0)
1044 return 0;
1045
1046 dev_info->event_interfaces =
1047 kzalloc(sizeof(struct iio_event_interface)
1048 *dev_info->info->num_interrupt_lines,
1049 GFP_KERNEL);
1050 if (dev_info->event_interfaces == NULL) {
1051 ret = -ENOMEM;
1052 goto error_ret;
1053 }
1054
1055 for (i = 0; i < dev_info->info->num_interrupt_lines; i++) {
1056 ret = iio_setup_ev_int(&dev_info->event_interfaces[i],
1057 dev_name(&dev_info->dev),
1058 i,
1059 dev_info->info->driver_module,
1060 &dev_info->dev);
1061 if (ret) {
1062 dev_err(&dev_info->dev,
1063 "Could not get chrdev interface\n");
1064 goto error_free_setup_ev_ints;
1065 }
1066
1067 dev_set_drvdata(&dev_info->event_interfaces[i].dev,
1068 (void *)dev_info);
1069
1070 if (dev_info->info->event_attrs != NULL)
1071 ret = sysfs_create_group(&dev_info
1072 ->event_interfaces[i]
1073 .dev.kobj,
1074 &dev_info->info
1075 ->event_attrs[i]);
1076
1077 if (ret) {
1078 dev_err(&dev_info->dev,
1079 "Failed to register sysfs for event attrs");
1080 goto error_remove_sysfs_interfaces;
1081 }
1082 }
1083
1084 for (i = 0; i < dev_info->info->num_interrupt_lines; i++) {
1085 ret = __iio_add_event_config_attrs(dev_info, i);
1086 if (ret)
1087 goto error_unregister_config_attrs;
1088 }
1089
1090 return 0;
1091
1092error_unregister_config_attrs:
1093 for (j = 0; j < i; j++)
1094 __iio_remove_event_config_attrs(dev_info, i);
1095 i = dev_info->info->num_interrupt_lines - 1;
1096error_remove_sysfs_interfaces:
1097 for (j = 0; j < i; j++)
1098 if (dev_info->info->event_attrs != NULL)
1099 sysfs_remove_group(&dev_info
1100 ->event_interfaces[j].dev.kobj,
1101 &dev_info->info->event_attrs[j]);
1102error_free_setup_ev_ints:
1103 for (j = 0; j < i; j++)
1104 iio_free_ev_int(&dev_info->event_interfaces[j]);
1105 kfree(dev_info->event_interfaces);
1106error_ret:
1107
1108 return ret;
1109}
1110
1111static void iio_device_unregister_eventset(struct iio_dev *dev_info)
1112{
1113 int i;
1114
1115 if (dev_info->info->num_interrupt_lines == 0)
1116 return;
1117 for (i = 0; i < dev_info->info->num_interrupt_lines; i++) {
1118 __iio_remove_event_config_attrs(dev_info, i);
1119 if (dev_info->info->event_attrs != NULL)
1120 sysfs_remove_group(&dev_info
1121 ->event_interfaces[i].dev.kobj,
1122 &dev_info->info->event_attrs[i]);
1123 }
1124
1125 for (i = 0; i < dev_info->info->num_interrupt_lines; i++)
1126 iio_free_ev_int(&dev_info->event_interfaces[i]);
1127 kfree(dev_info->event_interfaces);
1128}
1129
1130static void iio_dev_release(struct device *device)
1131{
1132 iio_put();
1133 kfree(to_iio_dev(device));
1134}
1135
1136static struct device_type iio_dev_type = {
1137 .name = "iio_device",
1138 .release = iio_dev_release,
1139};
1140
1141struct iio_dev *iio_allocate_device(int sizeof_priv)
1142{
1143 struct iio_dev *dev;
1144 size_t alloc_size;
1145
1146 alloc_size = sizeof(struct iio_dev);
1147 if (sizeof_priv) {
1148 alloc_size = ALIGN(alloc_size, IIO_ALIGN);
1149 alloc_size += sizeof_priv;
1150 }
1151 /* ensure 32-byte alignment of whole construct ? */
1152 alloc_size += IIO_ALIGN - 1;
1153
1154 dev = kzalloc(alloc_size, GFP_KERNEL);
1155
1156 if (dev) {
1157 dev->dev.type = &iio_dev_type;
1158 dev->dev.bus = &iio_bus_type;
1159 device_initialize(&dev->dev);
1160 dev_set_drvdata(&dev->dev, (void *)dev);
1161 mutex_init(&dev->mlock);
1162 iio_get();
1163 }
1164
1165 return dev;
1166}
1167EXPORT_SYMBOL(iio_allocate_device);
1168
1169void iio_free_device(struct iio_dev *dev)
1170{
1171 if (dev)
1172 iio_put_device(dev);
1173}
1174EXPORT_SYMBOL(iio_free_device);
1175
1176int iio_device_register(struct iio_dev *dev_info)
1177{
1178 int ret;
1179
1180 dev_info->id = iio_get_new_ida_val(&iio_ida);
1181 if (dev_info->id < 0) {
1182 ret = dev_info->id;
1183 dev_err(&dev_info->dev, "Failed to get id\n");
1184 goto error_ret;
1185 }
1186 dev_set_name(&dev_info->dev, "device%d", dev_info->id);
1187
1188 ret = device_add(&dev_info->dev);
1189 if (ret)
1190 goto error_free_ida;
1191 ret = iio_device_register_sysfs(dev_info);
1192 if (ret) {
1193 dev_err(dev_info->dev.parent,
1194 "Failed to register sysfs interfaces\n");
1195 goto error_del_device;
1196 }
1197 ret = iio_device_register_eventset(dev_info);
1198 if (ret) {
1199 dev_err(dev_info->dev.parent,
1200 "Failed to register event set\n");
1201 goto error_free_sysfs;
1202 }
1203 if (dev_info->modes & INDIO_RING_TRIGGERED)
1204 iio_device_register_trigger_consumer(dev_info);
1205
1206 return 0;
1207
1208error_free_sysfs:
1209 iio_device_unregister_sysfs(dev_info);
1210error_del_device:
1211 device_del(&dev_info->dev);
1212error_free_ida:
1213 iio_free_ida_val(&iio_ida, dev_info->id);
1214error_ret:
1215 return ret;
1216}
1217EXPORT_SYMBOL(iio_device_register);
1218
1219void iio_device_unregister(struct iio_dev *dev_info)
1220{
1221 if (dev_info->modes & INDIO_RING_TRIGGERED)
1222 iio_device_unregister_trigger_consumer(dev_info);
1223 iio_device_unregister_eventset(dev_info);
1224 iio_device_unregister_sysfs(dev_info);
1225 iio_free_ida_val(&iio_ida, dev_info->id);
1226 device_unregister(&dev_info->dev);
1227}
1228EXPORT_SYMBOL(iio_device_unregister);
1229
1230void iio_put(void)
1231{
1232 module_put(THIS_MODULE);
1233}
1234
1235void iio_get(void)
1236{
1237 __module_get(THIS_MODULE);
1238}
1239
1240subsys_initcall(iio_init);
1241module_exit(iio_exit);
1242
1243MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>");
1244MODULE_DESCRIPTION("Industrial I/O core");
1245MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/industrialio-ring.c b/drivers/staging/iio/industrialio-ring.c
new file mode 100644
index 00000000000..843eb82a69b
--- /dev/null
+++ b/drivers/staging/iio/industrialio-ring.c
@@ -0,0 +1,596 @@
1/* The industrial I/O core
2 *
3 * Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * Handling of ring allocation / resizing.
10 *
11 *
12 * Things to look at here.
13 * - Better memory allocation techniques?
14 * - Alternative access techniques?
15 */
16#include <linux/kernel.h>
17#include <linux/device.h>
18#include <linux/fs.h>
19#include <linux/cdev.h>
20#include <linux/slab.h>
21#include <linux/poll.h>
22
23#include "iio.h"
24#include "ring_generic.h"
25
26/**
27 * iio_ring_open() - chrdev file open for ring buffer access
28 *
29 * This function relies on all ring buffer implementations having an
30 * iio_ring_buffer as their first element.
31 **/
32static int iio_ring_open(struct inode *inode, struct file *filp)
33{
34 struct iio_handler *hand
35 = container_of(inode->i_cdev, struct iio_handler, chrdev);
36 struct iio_ring_buffer *rb = hand->private;
37
38 filp->private_data = hand->private;
39 if (rb->access->mark_in_use)
40 rb->access->mark_in_use(rb);
41
42 return 0;
43}
44
45/**
46 * iio_ring_release() - chrdev file close ring buffer access
47 *
48 * This function relies on all ring buffer implementations having an
49 * iio_ring_buffer as their first element.
50 **/
51static int iio_ring_release(struct inode *inode, struct file *filp)
52{
53 struct cdev *cd = inode->i_cdev;
54 struct iio_handler *hand = iio_cdev_to_handler(cd);
55 struct iio_ring_buffer *rb = hand->private;
56
57 clear_bit(IIO_BUSY_BIT_POS, &rb->access_handler.flags);
58 if (rb->access->unmark_in_use)
59 rb->access->unmark_in_use(rb);
60
61 return 0;
62}
63
64/**
65 * iio_ring_read_first_n_outer() - chrdev read for ring buffer access
66 *
67 * This function relies on all ring buffer implementations having an
68 * iio_ring _bufer as their first element.
69 **/
70static ssize_t iio_ring_read_first_n_outer(struct file *filp, char __user *buf,
71 size_t n, loff_t *f_ps)
72{
73 struct iio_ring_buffer *rb = filp->private_data;
74
75 if (!rb->access->read_first_n)
76 return -EINVAL;
77 return rb->access->read_first_n(rb, n, buf);
78}
79
80/**
81 * iio_ring_poll() - poll the ring to find out if it has data
82 */
83static unsigned int iio_ring_poll(struct file *filp,
84 struct poll_table_struct *wait)
85{
86 struct iio_ring_buffer *rb = filp->private_data;
87
88 poll_wait(filp, &rb->pollq, wait);
89 if (rb->stufftoread)
90 return POLLIN | POLLRDNORM;
91 /* need a way of knowing if there may be enough data... */
92 return 0;
93}
94
95static const struct file_operations iio_ring_fileops = {
96 .read = iio_ring_read_first_n_outer,
97 .release = iio_ring_release,
98 .open = iio_ring_open,
99 .poll = iio_ring_poll,
100 .owner = THIS_MODULE,
101 .llseek = noop_llseek,
102};
103
104void iio_ring_access_release(struct device *dev)
105{
106 struct iio_ring_buffer *buf
107 = container_of(dev, struct iio_ring_buffer, dev);
108 cdev_del(&buf->access_handler.chrdev);
109 iio_device_free_chrdev_minor(MINOR(dev->devt));
110}
111EXPORT_SYMBOL(iio_ring_access_release);
112
113static inline int
114__iio_request_ring_buffer_chrdev(struct iio_ring_buffer *buf,
115 struct module *owner,
116 int id)
117{
118 int ret;
119
120 buf->access_handler.flags = 0;
121 buf->dev.bus = &iio_bus_type;
122 device_initialize(&buf->dev);
123
124 ret = iio_device_get_chrdev_minor();
125 if (ret < 0)
126 goto error_device_put;
127
128 buf->dev.devt = MKDEV(MAJOR(iio_devt), ret);
129 dev_set_name(&buf->dev, "%s:buffer%d",
130 dev_name(buf->dev.parent),
131 id);
132 ret = device_add(&buf->dev);
133 if (ret < 0) {
134 printk(KERN_ERR "failed to add the ring dev\n");
135 goto error_device_put;
136 }
137 cdev_init(&buf->access_handler.chrdev, &iio_ring_fileops);
138 buf->access_handler.chrdev.owner = owner;
139 ret = cdev_add(&buf->access_handler.chrdev, buf->dev.devt, 1);
140 if (ret) {
141 printk(KERN_ERR "failed to allocate ring chrdev\n");
142 goto error_device_unregister;
143 }
144 return 0;
145
146error_device_unregister:
147 device_unregister(&buf->dev);
148error_device_put:
149 put_device(&buf->dev);
150
151 return ret;
152}
153
154static void __iio_free_ring_buffer_chrdev(struct iio_ring_buffer *buf)
155{
156 device_unregister(&buf->dev);
157}
158
159void iio_ring_buffer_init(struct iio_ring_buffer *ring,
160 struct iio_dev *dev_info)
161{
162 ring->indio_dev = dev_info;
163 ring->access_handler.private = ring;
164 init_waitqueue_head(&ring->pollq);
165}
166EXPORT_SYMBOL(iio_ring_buffer_init);
167
168static ssize_t iio_show_scan_index(struct device *dev,
169 struct device_attribute *attr,
170 char *buf)
171{
172 return sprintf(buf, "%u\n", to_iio_dev_attr(attr)->c->scan_index);
173}
174
175static ssize_t iio_show_fixed_type(struct device *dev,
176 struct device_attribute *attr,
177 char *buf)
178{
179 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
180 return sprintf(buf, "%c%d/%d>>%u\n",
181 this_attr->c->scan_type.sign,
182 this_attr->c->scan_type.realbits,
183 this_attr->c->scan_type.storagebits,
184 this_attr->c->scan_type.shift);
185}
186
187static ssize_t iio_scan_el_show(struct device *dev,
188 struct device_attribute *attr,
189 char *buf)
190{
191 int ret;
192 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
193
194 ret = iio_scan_mask_query(ring, to_iio_dev_attr(attr)->address);
195 if (ret < 0)
196 return ret;
197 return sprintf(buf, "%d\n", ret);
198}
199
200static int iio_scan_mask_clear(struct iio_ring_buffer *ring, int bit)
201{
202 if (bit > IIO_MAX_SCAN_LENGTH)
203 return -EINVAL;
204 ring->scan_mask &= ~(1 << bit);
205 ring->scan_count--;
206 return 0;
207}
208
209static ssize_t iio_scan_el_store(struct device *dev,
210 struct device_attribute *attr,
211 const char *buf,
212 size_t len)
213{
214 int ret = 0;
215 bool state;
216 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
217 struct iio_dev *indio_dev = ring->indio_dev;
218 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
219
220 state = !(buf[0] == '0');
221 mutex_lock(&indio_dev->mlock);
222 if (indio_dev->currentmode == INDIO_RING_TRIGGERED) {
223 ret = -EBUSY;
224 goto error_ret;
225 }
226 ret = iio_scan_mask_query(ring, this_attr->address);
227 if (ret < 0)
228 goto error_ret;
229 if (!state && ret) {
230 ret = iio_scan_mask_clear(ring, this_attr->address);
231 if (ret)
232 goto error_ret;
233 } else if (state && !ret) {
234 ret = iio_scan_mask_set(ring, this_attr->address);
235 if (ret)
236 goto error_ret;
237 }
238
239error_ret:
240 mutex_unlock(&indio_dev->mlock);
241
242 return ret ? ret : len;
243
244}
245
246static ssize_t iio_scan_el_ts_show(struct device *dev,
247 struct device_attribute *attr,
248 char *buf)
249{
250 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
251 return sprintf(buf, "%d\n", ring->scan_timestamp);
252}
253
254static ssize_t iio_scan_el_ts_store(struct device *dev,
255 struct device_attribute *attr,
256 const char *buf,
257 size_t len)
258{
259 int ret = 0;
260 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
261 struct iio_dev *indio_dev = ring->indio_dev;
262 bool state;
263 state = !(buf[0] == '0');
264 mutex_lock(&indio_dev->mlock);
265 if (indio_dev->currentmode == INDIO_RING_TRIGGERED) {
266 ret = -EBUSY;
267 goto error_ret;
268 }
269 ring->scan_timestamp = state;
270error_ret:
271 mutex_unlock(&indio_dev->mlock);
272
273 return ret ? ret : len;
274}
275
276static int iio_ring_add_channel_sysfs(struct iio_ring_buffer *ring,
277 const struct iio_chan_spec *chan)
278{
279 int ret;
280
281 ret = __iio_add_chan_devattr("index", "scan_elements",
282 chan,
283 &iio_show_scan_index,
284 NULL,
285 0,
286 0,
287 &ring->dev,
288 &ring->scan_el_dev_attr_list);
289 if (ret)
290 goto error_ret;
291
292 ret = __iio_add_chan_devattr("type", "scan_elements",
293 chan,
294 &iio_show_fixed_type,
295 NULL,
296 0,
297 0,
298 &ring->dev,
299 &ring->scan_el_dev_attr_list);
300 if (ret)
301 goto error_ret;
302
303 if (chan->type != IIO_TIMESTAMP)
304 ret = __iio_add_chan_devattr("en", "scan_elements",
305 chan,
306 &iio_scan_el_show,
307 &iio_scan_el_store,
308 chan->scan_index,
309 0,
310 &ring->dev,
311 &ring->scan_el_dev_attr_list);
312 else
313 ret = __iio_add_chan_devattr("en", "scan_elements",
314 chan,
315 &iio_scan_el_ts_show,
316 &iio_scan_el_ts_store,
317 chan->scan_index,
318 0,
319 &ring->dev,
320 &ring->scan_el_dev_attr_list);
321error_ret:
322 return ret;
323}
324
325static void iio_ring_remove_and_free_scan_dev_attr(struct iio_ring_buffer *ring,
326 struct iio_dev_attr *p)
327{
328 sysfs_remove_file_from_group(&ring->dev.kobj,
329 &p->dev_attr.attr, "scan_elements");
330 kfree(p->dev_attr.attr.name);
331 kfree(p);
332}
333
334static struct attribute *iio_scan_el_dummy_attrs[] = {
335 NULL
336};
337
338static struct attribute_group iio_scan_el_dummy_group = {
339 .name = "scan_elements",
340 .attrs = iio_scan_el_dummy_attrs
341};
342
343static void __iio_ring_attr_cleanup(struct iio_ring_buffer *ring)
344{
345 struct iio_dev_attr *p, *n;
346 int anydynamic = !list_empty(&ring->scan_el_dev_attr_list);
347 list_for_each_entry_safe(p, n,
348 &ring->scan_el_dev_attr_list, l)
349 iio_ring_remove_and_free_scan_dev_attr(ring, p);
350
351 if (ring->scan_el_attrs)
352 sysfs_remove_group(&ring->dev.kobj,
353 ring->scan_el_attrs);
354 else if (anydynamic)
355 sysfs_remove_group(&ring->dev.kobj,
356 &iio_scan_el_dummy_group);
357}
358
359int iio_ring_buffer_register_ex(struct iio_ring_buffer *ring, int id,
360 const struct iio_chan_spec *channels,
361 int num_channels)
362{
363 int ret, i;
364
365 ret = __iio_request_ring_buffer_chrdev(ring, ring->owner, id);
366 if (ret)
367 goto error_ret;
368
369 if (ring->scan_el_attrs) {
370 ret = sysfs_create_group(&ring->dev.kobj,
371 ring->scan_el_attrs);
372 if (ret) {
373 dev_err(&ring->dev,
374 "Failed to add sysfs scan elements\n");
375 goto error_free_ring_buffer_chrdev;
376 }
377 } else if (channels) {
378 ret = sysfs_create_group(&ring->dev.kobj,
379 &iio_scan_el_dummy_group);
380 if (ret)
381 goto error_free_ring_buffer_chrdev;
382 }
383
384 INIT_LIST_HEAD(&ring->scan_el_dev_attr_list);
385 if (channels) {
386 /* new magic */
387 for (i = 0; i < num_channels; i++) {
388 ret = iio_ring_add_channel_sysfs(ring, &channels[i]);
389 if (ret < 0)
390 goto error_cleanup_dynamic;
391 }
392 }
393
394 return 0;
395error_cleanup_dynamic:
396 __iio_ring_attr_cleanup(ring);
397error_free_ring_buffer_chrdev:
398 __iio_free_ring_buffer_chrdev(ring);
399error_ret:
400 return ret;
401}
402EXPORT_SYMBOL(iio_ring_buffer_register_ex);
403
404void iio_ring_buffer_unregister(struct iio_ring_buffer *ring)
405{
406 __iio_ring_attr_cleanup(ring);
407 __iio_free_ring_buffer_chrdev(ring);
408}
409EXPORT_SYMBOL(iio_ring_buffer_unregister);
410
411ssize_t iio_read_ring_length(struct device *dev,
412 struct device_attribute *attr,
413 char *buf)
414{
415 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
416
417 if (ring->access->get_length)
418 return sprintf(buf, "%d\n",
419 ring->access->get_length(ring));
420
421 return 0;
422}
423EXPORT_SYMBOL(iio_read_ring_length);
424
425ssize_t iio_write_ring_length(struct device *dev,
426 struct device_attribute *attr,
427 const char *buf,
428 size_t len)
429{
430 int ret;
431 ulong val;
432 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
433
434 ret = strict_strtoul(buf, 10, &val);
435 if (ret)
436 return ret;
437
438 if (ring->access->get_length)
439 if (val == ring->access->get_length(ring))
440 return len;
441
442 if (ring->access->set_length) {
443 ring->access->set_length(ring, val);
444 if (ring->access->mark_param_change)
445 ring->access->mark_param_change(ring);
446 }
447
448 return len;
449}
450EXPORT_SYMBOL(iio_write_ring_length);
451
452ssize_t iio_read_ring_bytes_per_datum(struct device *dev,
453 struct device_attribute *attr,
454 char *buf)
455{
456 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
457
458 if (ring->access->get_bytes_per_datum)
459 return sprintf(buf, "%d\n",
460 ring->access->get_bytes_per_datum(ring));
461
462 return 0;
463}
464EXPORT_SYMBOL(iio_read_ring_bytes_per_datum);
465
466ssize_t iio_store_ring_enable(struct device *dev,
467 struct device_attribute *attr,
468 const char *buf,
469 size_t len)
470{
471 int ret;
472 bool requested_state, current_state;
473 int previous_mode;
474 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
475 struct iio_dev *dev_info = ring->indio_dev;
476
477 mutex_lock(&dev_info->mlock);
478 previous_mode = dev_info->currentmode;
479 requested_state = !(buf[0] == '0');
480 current_state = !!(previous_mode & INDIO_ALL_RING_MODES);
481 if (current_state == requested_state) {
482 printk(KERN_INFO "iio-ring, current state requested again\n");
483 goto done;
484 }
485 if (requested_state) {
486 if (ring->setup_ops->preenable) {
487 ret = ring->setup_ops->preenable(dev_info);
488 if (ret) {
489 printk(KERN_ERR
490 "Buffer not started:"
491 "ring preenable failed\n");
492 goto error_ret;
493 }
494 }
495 if (ring->access->request_update) {
496 ret = ring->access->request_update(ring);
497 if (ret) {
498 printk(KERN_INFO
499 "Buffer not started:"
500 "ring parameter update failed\n");
501 goto error_ret;
502 }
503 }
504 if (ring->access->mark_in_use)
505 ring->access->mark_in_use(ring);
506 /* Definitely possible for devices to support both of these.*/
507 if (dev_info->modes & INDIO_RING_TRIGGERED) {
508 if (!dev_info->trig) {
509 printk(KERN_INFO
510 "Buffer not started: no trigger\n");
511 ret = -EINVAL;
512 if (ring->access->unmark_in_use)
513 ring->access->unmark_in_use(ring);
514 goto error_ret;
515 }
516 dev_info->currentmode = INDIO_RING_TRIGGERED;
517 } else if (dev_info->modes & INDIO_RING_HARDWARE_BUFFER)
518 dev_info->currentmode = INDIO_RING_HARDWARE_BUFFER;
519 else { /* should never be reached */
520 ret = -EINVAL;
521 goto error_ret;
522 }
523
524 if (ring->setup_ops->postenable) {
525 ret = ring->setup_ops->postenable(dev_info);
526 if (ret) {
527 printk(KERN_INFO
528 "Buffer not started:"
529 "postenable failed\n");
530 if (ring->access->unmark_in_use)
531 ring->access->unmark_in_use(ring);
532 dev_info->currentmode = previous_mode;
533 if (ring->setup_ops->postdisable)
534 ring->setup_ops->postdisable(dev_info);
535 goto error_ret;
536 }
537 }
538 } else {
539 if (ring->setup_ops->predisable) {
540 ret = ring->setup_ops->predisable(dev_info);
541 if (ret)
542 goto error_ret;
543 }
544 if (ring->access->unmark_in_use)
545 ring->access->unmark_in_use(ring);
546 dev_info->currentmode = INDIO_DIRECT_MODE;
547 if (ring->setup_ops->postdisable) {
548 ret = ring->setup_ops->postdisable(dev_info);
549 if (ret)
550 goto error_ret;
551 }
552 }
553done:
554 mutex_unlock(&dev_info->mlock);
555 return len;
556
557error_ret:
558 mutex_unlock(&dev_info->mlock);
559 return ret;
560}
561EXPORT_SYMBOL(iio_store_ring_enable);
562
563ssize_t iio_show_ring_enable(struct device *dev,
564 struct device_attribute *attr,
565 char *buf)
566{
567 struct iio_ring_buffer *ring = dev_get_drvdata(dev);
568 return sprintf(buf, "%d\n", !!(ring->indio_dev->currentmode
569 & INDIO_ALL_RING_MODES));
570}
571EXPORT_SYMBOL(iio_show_ring_enable);
572
573int iio_sw_ring_preenable(struct iio_dev *indio_dev)
574{
575 struct iio_ring_buffer *ring = indio_dev->ring;
576 size_t size;
577 dev_dbg(&indio_dev->dev, "%s\n", __func__);
578 /* Check if there are any scan elements enabled, if not fail*/
579 if (!(ring->scan_count || ring->scan_timestamp))
580 return -EINVAL;
581 if (ring->scan_timestamp)
582 if (ring->scan_count)
583 /* Timestamp (aligned to s64) and data */
584 size = (((ring->scan_count * ring->bpe)
585 + sizeof(s64) - 1)
586 & ~(sizeof(s64) - 1))
587 + sizeof(s64);
588 else /* Timestamp only */
589 size = sizeof(s64);
590 else /* Data only */
591 size = ring->scan_count * ring->bpe;
592 ring->access->set_bytes_per_datum(ring, size);
593
594 return 0;
595}
596EXPORT_SYMBOL(iio_sw_ring_preenable);
diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c
new file mode 100644
index 00000000000..90ca2df23ea
--- /dev/null
+++ b/drivers/staging/iio/industrialio-trigger.c
@@ -0,0 +1,525 @@
1/* The industrial I/O core, trigger handling functions
2 *
3 * Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/idr.h>
13#include <linux/err.h>
14#include <linux/device.h>
15#include <linux/interrupt.h>
16#include <linux/list.h>
17#include <linux/slab.h>
18
19#include "iio.h"
20#include "trigger.h"
21#include "trigger_consumer.h"
22
23/* RFC - Question of approach
24 * Make the common case (single sensor single trigger)
25 * simple by starting trigger capture from when first sensors
26 * is added.
27 *
28 * Complex simultaneous start requires use of 'hold' functionality
29 * of the trigger. (not implemented)
30 *
31 * Any other suggestions?
32 */
33
34static DEFINE_IDR(iio_trigger_idr);
35static DEFINE_SPINLOCK(iio_trigger_idr_lock);
36
37/* Single list of all available triggers */
38static LIST_HEAD(iio_trigger_list);
39static DEFINE_MUTEX(iio_trigger_list_lock);
40
41/**
42 * iio_trigger_read_name() - retrieve useful identifying name
43 **/
44static ssize_t iio_trigger_read_name(struct device *dev,
45 struct device_attribute *attr,
46 char *buf)
47{
48 struct iio_trigger *trig = dev_get_drvdata(dev);
49 return sprintf(buf, "%s\n", trig->name);
50}
51
52static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
53
54/**
55 * iio_trigger_register_sysfs() - create a device for this trigger
56 * @trig_info: the trigger
57 *
58 * Also adds any control attribute registered by the trigger driver
59 **/
60static int iio_trigger_register_sysfs(struct iio_trigger *trig_info)
61{
62 return sysfs_add_file_to_group(&trig_info->dev.kobj,
63 &dev_attr_name.attr,
64 NULL);
65}
66
67static void iio_trigger_unregister_sysfs(struct iio_trigger *trig_info)
68{
69 sysfs_remove_file_from_group(&trig_info->dev.kobj,
70 &dev_attr_name.attr,
71 NULL);
72}
73
74
75/**
76 * iio_trigger_register_id() - get a unique id for this trigger
77 * @trig_info: the trigger
78 **/
79static int iio_trigger_register_id(struct iio_trigger *trig_info)
80{
81 int ret = 0;
82
83idr_again:
84 if (unlikely(idr_pre_get(&iio_trigger_idr, GFP_KERNEL) == 0))
85 return -ENOMEM;
86
87 spin_lock(&iio_trigger_idr_lock);
88 ret = idr_get_new(&iio_trigger_idr, NULL, &trig_info->id);
89 spin_unlock(&iio_trigger_idr_lock);
90 if (unlikely(ret == -EAGAIN))
91 goto idr_again;
92 else if (likely(!ret))
93 trig_info->id = trig_info->id & MAX_ID_MASK;
94
95 return ret;
96}
97
98/**
99 * iio_trigger_unregister_id() - free up unique id for use by another trigger
100 * @trig_info: the trigger
101 **/
102static void iio_trigger_unregister_id(struct iio_trigger *trig_info)
103{
104 spin_lock(&iio_trigger_idr_lock);
105 idr_remove(&iio_trigger_idr, trig_info->id);
106 spin_unlock(&iio_trigger_idr_lock);
107}
108
109int iio_trigger_register(struct iio_trigger *trig_info)
110{
111 int ret;
112
113 ret = iio_trigger_register_id(trig_info);
114 if (ret)
115 goto error_ret;
116 /* Set the name used for the sysfs directory etc */
117 dev_set_name(&trig_info->dev, "trigger%ld",
118 (unsigned long) trig_info->id);
119
120 ret = device_add(&trig_info->dev);
121 if (ret)
122 goto error_unregister_id;
123
124 ret = iio_trigger_register_sysfs(trig_info);
125 if (ret)
126 goto error_device_del;
127
128 /* Add to list of available triggers held by the IIO core */
129 mutex_lock(&iio_trigger_list_lock);
130 list_add_tail(&trig_info->list, &iio_trigger_list);
131 mutex_unlock(&iio_trigger_list_lock);
132
133 return 0;
134
135error_device_del:
136 device_del(&trig_info->dev);
137error_unregister_id:
138 iio_trigger_unregister_id(trig_info);
139error_ret:
140 return ret;
141}
142EXPORT_SYMBOL(iio_trigger_register);
143
144void iio_trigger_unregister(struct iio_trigger *trig_info)
145{
146 mutex_lock(&iio_trigger_list_lock);
147 list_del(&trig_info->list);
148 mutex_unlock(&iio_trigger_list_lock);
149
150 iio_trigger_unregister_sysfs(trig_info);
151 iio_trigger_unregister_id(trig_info);
152 /* Possible issue in here */
153 device_unregister(&trig_info->dev);
154}
155EXPORT_SYMBOL(iio_trigger_unregister);
156
157static struct iio_trigger *iio_trigger_find_by_name(const char *name,
158 size_t len)
159{
160 struct iio_trigger *trig = NULL, *iter;
161
162 mutex_lock(&iio_trigger_list_lock);
163 list_for_each_entry(iter, &iio_trigger_list, list)
164 if (sysfs_streq(iter->name, name)) {
165 trig = iter;
166 break;
167 }
168 mutex_unlock(&iio_trigger_list_lock);
169
170 return trig;
171}
172
173void iio_trigger_poll(struct iio_trigger *trig, s64 time)
174{
175 int i;
176 if (!trig->use_count) {
177 for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++)
178 if (trig->subirqs[i].enabled) {
179 trig->use_count++;
180 generic_handle_irq(trig->subirq_base + i);
181 }
182 }
183}
184EXPORT_SYMBOL(iio_trigger_poll);
185
186irqreturn_t iio_trigger_generic_data_rdy_poll(int irq, void *private)
187{
188 iio_trigger_poll(private, iio_get_time_ns());
189 return IRQ_HANDLED;
190}
191EXPORT_SYMBOL(iio_trigger_generic_data_rdy_poll);
192
193void iio_trigger_poll_chained(struct iio_trigger *trig, s64 time)
194{
195 int i;
196 if (!trig->use_count) {
197 for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++)
198 if (trig->subirqs[i].enabled) {
199 trig->use_count++;
200 handle_nested_irq(trig->subirq_base + i);
201 }
202 }
203}
204EXPORT_SYMBOL(iio_trigger_poll_chained);
205
206void iio_trigger_notify_done(struct iio_trigger *trig)
207{
208 trig->use_count--;
209 if (trig->use_count == 0 && trig->try_reenable)
210 if (trig->try_reenable(trig)) {
211 /* Missed and interrupt so launch new poll now */
212 iio_trigger_poll(trig, 0);
213 }
214}
215EXPORT_SYMBOL(iio_trigger_notify_done);
216
217/* Trigger Consumer related functions */
218
219/* Complexity in here. With certain triggers (datardy) an acknowledgement
220 * may be needed if the pollfuncs do not include the data read for the
221 * triggering device.
222 * This is not currently handled. Alternative of not enabling trigger unless
223 * the relevant function is in there may be the best option.
224 */
225/* Worth protecting against double additions?*/
226int iio_trigger_attach_poll_func(struct iio_trigger *trig,
227 struct iio_poll_func *pf)
228{
229 int ret = 0;
230 bool notinuse
231 = bitmap_empty(trig->pool, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
232
233 pf->irq = iio_trigger_get_irq(trig);
234 ret = request_threaded_irq(pf->irq, pf->h, pf->thread,
235 pf->type, pf->name,
236 pf);
237 if (trig->set_trigger_state && notinuse)
238 ret = trig->set_trigger_state(trig, true);
239
240 return ret;
241}
242EXPORT_SYMBOL(iio_trigger_attach_poll_func);
243
244int iio_trigger_dettach_poll_func(struct iio_trigger *trig,
245 struct iio_poll_func *pf)
246{
247 int ret = 0;
248 bool no_other_users
249 = (bitmap_weight(trig->pool,
250 CONFIG_IIO_CONSUMERS_PER_TRIGGER)
251 == 1);
252 if (trig->set_trigger_state && no_other_users) {
253 ret = trig->set_trigger_state(trig, false);
254 if (ret)
255 goto error_ret;
256 }
257 iio_trigger_put_irq(trig, pf->irq);
258 free_irq(pf->irq, pf);
259
260error_ret:
261 return ret;
262}
263EXPORT_SYMBOL(iio_trigger_dettach_poll_func);
264
265irqreturn_t iio_pollfunc_store_time(int irq, void *p)
266{
267 struct iio_poll_func *pf = p;
268 pf->timestamp = iio_get_time_ns();
269 return IRQ_WAKE_THREAD;
270}
271EXPORT_SYMBOL(iio_pollfunc_store_time);
272
273struct iio_poll_func
274*iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
275 irqreturn_t (*thread)(int irq, void *p),
276 int type,
277 void *private,
278 const char *fmt,
279 ...)
280{
281 va_list vargs;
282 struct iio_poll_func *pf;
283
284 pf = kmalloc(sizeof *pf, GFP_KERNEL);
285 if (pf == NULL)
286 return NULL;
287 va_start(vargs, fmt);
288 pf->name = kvasprintf(GFP_KERNEL, fmt, vargs);
289 va_end(vargs);
290 if (pf->name == NULL) {
291 kfree(pf);
292 return NULL;
293 }
294 pf->h = h;
295 pf->thread = thread;
296 pf->type = type;
297 pf->private_data = private;
298
299 return pf;
300}
301EXPORT_SYMBOL_GPL(iio_alloc_pollfunc);
302
303void iio_dealloc_pollfunc(struct iio_poll_func *pf)
304{
305 kfree(pf->name);
306 kfree(pf);
307}
308EXPORT_SYMBOL_GPL(iio_dealloc_pollfunc);
309
310/**
311 * iio_trigger_read_currrent() - trigger consumer sysfs query which trigger
312 *
313 * For trigger consumers the current_trigger interface allows the trigger
314 * used by the device to be queried.
315 **/
316static ssize_t iio_trigger_read_current(struct device *dev,
317 struct device_attribute *attr,
318 char *buf)
319{
320 struct iio_dev *dev_info = dev_get_drvdata(dev);
321 int len = 0;
322 if (dev_info->trig)
323 len = sprintf(buf,
324 "%s\n",
325 dev_info->trig->name);
326 return len;
327}
328
329/**
330 * iio_trigger_write_current() trigger consumer sysfs set current trigger
331 *
332 * For trigger consumers the current_trigger interface allows the trigger
333 * used for this device to be specified at run time based on the triggers
334 * name.
335 **/
336static ssize_t iio_trigger_write_current(struct device *dev,
337 struct device_attribute *attr,
338 const char *buf,
339 size_t len)
340{
341 struct iio_dev *dev_info = dev_get_drvdata(dev);
342 struct iio_trigger *oldtrig = dev_info->trig;
343 struct iio_trigger *trig;
344 int ret;
345
346 mutex_lock(&dev_info->mlock);
347 if (dev_info->currentmode == INDIO_RING_TRIGGERED) {
348 mutex_unlock(&dev_info->mlock);
349 return -EBUSY;
350 }
351 mutex_unlock(&dev_info->mlock);
352
353 trig = iio_trigger_find_by_name(buf, len);
354
355 if (trig && dev_info->info->validate_trigger) {
356 ret = dev_info->info->validate_trigger(dev_info, trig);
357 if (ret)
358 return ret;
359 }
360
361 if (trig && trig->validate_device) {
362 ret = trig->validate_device(trig, dev_info);
363 if (ret)
364 return ret;
365 }
366
367 dev_info->trig = trig;
368
369 if (oldtrig && dev_info->trig != oldtrig)
370 iio_put_trigger(oldtrig);
371 if (dev_info->trig)
372 iio_get_trigger(dev_info->trig);
373
374 return len;
375}
376
377static DEVICE_ATTR(current_trigger, S_IRUGO | S_IWUSR,
378 iio_trigger_read_current,
379 iio_trigger_write_current);
380
381static struct attribute *iio_trigger_consumer_attrs[] = {
382 &dev_attr_current_trigger.attr,
383 NULL,
384};
385
386static const struct attribute_group iio_trigger_consumer_attr_group = {
387 .name = "trigger",
388 .attrs = iio_trigger_consumer_attrs,
389};
390
391static void iio_trig_release(struct device *device)
392{
393 struct iio_trigger *trig = to_iio_trigger(device);
394 int i;
395
396 if (trig->subirq_base) {
397 for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++) {
398 irq_modify_status(trig->subirq_base + i,
399 IRQ_NOAUTOEN,
400 IRQ_NOREQUEST | IRQ_NOPROBE);
401 irq_set_chip(trig->subirq_base + i,
402 NULL);
403 irq_set_handler(trig->subirq_base + i,
404 NULL);
405 }
406
407 irq_free_descs(trig->subirq_base,
408 CONFIG_IIO_CONSUMERS_PER_TRIGGER);
409 }
410 kfree(trig->name);
411 kfree(trig);
412 iio_put();
413}
414
415static struct device_type iio_trig_type = {
416 .release = iio_trig_release,
417};
418
419static void iio_trig_subirqmask(struct irq_data *d)
420{
421 struct irq_chip *chip = irq_data_get_irq_chip(d);
422 struct iio_trigger *trig
423 = container_of(chip,
424 struct iio_trigger, subirq_chip);
425 trig->subirqs[d->irq - trig->subirq_base].enabled = false;
426}
427
428static void iio_trig_subirqunmask(struct irq_data *d)
429{
430 struct irq_chip *chip = irq_data_get_irq_chip(d);
431 struct iio_trigger *trig
432 = container_of(chip,
433 struct iio_trigger, subirq_chip);
434 trig->subirqs[d->irq - trig->subirq_base].enabled = true;
435}
436
437struct iio_trigger *iio_allocate_trigger(const char *fmt, ...)
438{
439 va_list vargs;
440 struct iio_trigger *trig;
441 trig = kzalloc(sizeof *trig, GFP_KERNEL);
442 if (trig) {
443 int i;
444 trig->dev.type = &iio_trig_type;
445 trig->dev.bus = &iio_bus_type;
446 device_initialize(&trig->dev);
447 dev_set_drvdata(&trig->dev, (void *)trig);
448
449 mutex_init(&trig->pool_lock);
450 trig->subirq_base
451 = irq_alloc_descs(-1, 0,
452 CONFIG_IIO_CONSUMERS_PER_TRIGGER,
453 0);
454 if (trig->subirq_base < 0) {
455 kfree(trig);
456 return NULL;
457 }
458 va_start(vargs, fmt);
459 trig->name = kvasprintf(GFP_KERNEL, fmt, vargs);
460 va_end(vargs);
461 if (trig->name == NULL) {
462 irq_free_descs(trig->subirq_base,
463 CONFIG_IIO_CONSUMERS_PER_TRIGGER);
464 kfree(trig);
465 return NULL;
466 }
467 trig->subirq_chip.name = trig->name;
468 trig->subirq_chip.irq_mask = &iio_trig_subirqmask;
469 trig->subirq_chip.irq_unmask = &iio_trig_subirqunmask;
470 for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++) {
471 irq_set_chip(trig->subirq_base + i,
472 &trig->subirq_chip);
473 irq_set_handler(trig->subirq_base + i,
474 &handle_simple_irq);
475 irq_modify_status(trig->subirq_base + i,
476 IRQ_NOREQUEST | IRQ_NOAUTOEN,
477 IRQ_NOPROBE);
478 }
479 iio_get();
480 }
481 return trig;
482}
483EXPORT_SYMBOL(iio_allocate_trigger);
484
485void iio_free_trigger(struct iio_trigger *trig)
486{
487 if (trig)
488 put_device(&trig->dev);
489}
490EXPORT_SYMBOL(iio_free_trigger);
491
492int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
493{
494 int ret;
495 ret = sysfs_create_group(&dev_info->dev.kobj,
496 &iio_trigger_consumer_attr_group);
497 return ret;
498}
499EXPORT_SYMBOL(iio_device_register_trigger_consumer);
500
501int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info)
502{
503 sysfs_remove_group(&dev_info->dev.kobj,
504 &iio_trigger_consumer_attr_group);
505 return 0;
506}
507EXPORT_SYMBOL(iio_device_unregister_trigger_consumer);
508
509int iio_triggered_ring_postenable(struct iio_dev *indio_dev)
510{
511 return indio_dev->trig
512 ? iio_trigger_attach_poll_func(indio_dev->trig,
513 indio_dev->pollfunc)
514 : 0;
515}
516EXPORT_SYMBOL(iio_triggered_ring_postenable);
517
518int iio_triggered_ring_predisable(struct iio_dev *indio_dev)
519{
520 return indio_dev->trig
521 ? iio_trigger_dettach_poll_func(indio_dev->trig,
522 indio_dev->pollfunc)
523 : 0;
524}
525EXPORT_SYMBOL(iio_triggered_ring_predisable);
diff --git a/drivers/staging/iio/kfifo_buf.c b/drivers/staging/iio/kfifo_buf.c
new file mode 100644
index 00000000000..6002368fdcf
--- /dev/null
+++ b/drivers/staging/iio/kfifo_buf.c
@@ -0,0 +1,203 @@
1#include <linux/slab.h>
2#include <linux/kernel.h>
3#include <linux/module.h>
4#include <linux/device.h>
5#include <linux/workqueue.h>
6#include <linux/kfifo.h>
7#include <linux/mutex.h>
8
9#include "kfifo_buf.h"
10
11#define iio_to_kfifo(r) container_of(r, struct iio_kfifo, ring)
12
13static inline int __iio_allocate_kfifo(struct iio_kfifo *buf,
14 int bytes_per_datum, int length)
15{
16 if ((length == 0) || (bytes_per_datum == 0))
17 return -EINVAL;
18
19 __iio_update_ring_buffer(&buf->ring, bytes_per_datum, length);
20 return kfifo_alloc(&buf->kf, bytes_per_datum*length, GFP_KERNEL);
21}
22
23static int iio_request_update_kfifo(struct iio_ring_buffer *r)
24{
25 int ret = 0;
26 struct iio_kfifo *buf = iio_to_kfifo(r);
27
28 mutex_lock(&buf->use_lock);
29 if (!buf->update_needed)
30 goto error_ret;
31 if (buf->use_count) {
32 ret = -EAGAIN;
33 goto error_ret;
34 }
35 kfifo_free(&buf->kf);
36 ret = __iio_allocate_kfifo(buf, buf->ring.bytes_per_datum,
37 buf->ring.length);
38error_ret:
39 mutex_unlock(&buf->use_lock);
40 return ret;
41}
42
43static void iio_mark_kfifo_in_use(struct iio_ring_buffer *r)
44{
45 struct iio_kfifo *buf = iio_to_kfifo(r);
46 mutex_lock(&buf->use_lock);
47 buf->use_count++;
48 mutex_unlock(&buf->use_lock);
49}
50
51static void iio_unmark_kfifo_in_use(struct iio_ring_buffer *r)
52{
53 struct iio_kfifo *buf = iio_to_kfifo(r);
54 mutex_lock(&buf->use_lock);
55 buf->use_count--;
56 mutex_unlock(&buf->use_lock);
57}
58
59static int iio_get_length_kfifo(struct iio_ring_buffer *r)
60{
61 return r->length;
62}
63
64static inline void __iio_init_kfifo(struct iio_kfifo *kf)
65{
66 mutex_init(&kf->use_lock);
67}
68
69static IIO_RING_ENABLE_ATTR;
70static IIO_RING_BYTES_PER_DATUM_ATTR;
71static IIO_RING_LENGTH_ATTR;
72
73static struct attribute *iio_kfifo_attributes[] = {
74 &dev_attr_length.attr,
75 &dev_attr_bytes_per_datum.attr,
76 &dev_attr_enable.attr,
77 NULL,
78};
79
80static struct attribute_group iio_kfifo_attribute_group = {
81 .attrs = iio_kfifo_attributes,
82};
83
84static const struct attribute_group *iio_kfifo_attribute_groups[] = {
85 &iio_kfifo_attribute_group,
86 NULL
87};
88
89static void iio_kfifo_release(struct device *dev)
90{
91 struct iio_ring_buffer *r = to_iio_ring_buffer(dev);
92 struct iio_kfifo *kf = iio_to_kfifo(r);
93 kfifo_free(&kf->kf);
94 kfree(kf);
95}
96
97static struct device_type iio_kfifo_type = {
98 .release = iio_kfifo_release,
99 .groups = iio_kfifo_attribute_groups,
100};
101
102struct iio_ring_buffer *iio_kfifo_allocate(struct iio_dev *indio_dev)
103{
104 struct iio_kfifo *kf;
105
106 kf = kzalloc(sizeof *kf, GFP_KERNEL);
107 if (!kf)
108 return NULL;
109 kf->update_needed = true;
110 iio_ring_buffer_init(&kf->ring, indio_dev);
111 __iio_init_kfifo(kf);
112 kf->ring.dev.type = &iio_kfifo_type;
113 kf->ring.dev.parent = &indio_dev->dev;
114 dev_set_drvdata(&kf->ring.dev, (void *)&(kf->ring));
115
116 return &kf->ring;
117}
118EXPORT_SYMBOL(iio_kfifo_allocate);
119
120static int iio_get_bytes_per_datum_kfifo(struct iio_ring_buffer *r)
121{
122 return r->bytes_per_datum;
123}
124
125static int iio_set_bytes_per_datum_kfifo(struct iio_ring_buffer *r, size_t bpd)
126{
127 if (r->bytes_per_datum != bpd) {
128 r->bytes_per_datum = bpd;
129 if (r->access->mark_param_change)
130 r->access->mark_param_change(r);
131 }
132 return 0;
133}
134
135static int iio_mark_update_needed_kfifo(struct iio_ring_buffer *r)
136{
137 struct iio_kfifo *kf = iio_to_kfifo(r);
138 kf->update_needed = true;
139 return 0;
140}
141
142static int iio_set_length_kfifo(struct iio_ring_buffer *r, int length)
143{
144 if (r->length != length) {
145 r->length = length;
146 if (r->access->mark_param_change)
147 r->access->mark_param_change(r);
148 }
149 return 0;
150}
151
152void iio_kfifo_free(struct iio_ring_buffer *r)
153{
154 if (r)
155 iio_put_ring_buffer(r);
156}
157EXPORT_SYMBOL(iio_kfifo_free);
158
159static int iio_store_to_kfifo(struct iio_ring_buffer *r,
160 u8 *data,
161 s64 timestamp)
162{
163 int ret;
164 struct iio_kfifo *kf = iio_to_kfifo(r);
165 u8 *datal = kmalloc(r->bytes_per_datum, GFP_KERNEL);
166 memcpy(datal, data, r->bytes_per_datum - sizeof(timestamp));
167 memcpy(datal + r->bytes_per_datum - sizeof(timestamp),
168 &timestamp, sizeof(timestamp));
169 ret = kfifo_in(&kf->kf, data, r->bytes_per_datum);
170 if (ret != r->bytes_per_datum) {
171 kfree(datal);
172 return -EBUSY;
173 }
174 kfree(datal);
175 return 0;
176}
177
178static int iio_read_first_n_kfifo(struct iio_ring_buffer *r,
179 size_t n, char __user *buf)
180{
181 int ret, copied;
182 struct iio_kfifo *kf = iio_to_kfifo(r);
183
184 ret = kfifo_to_user(&kf->kf, buf, r->bytes_per_datum*n, &copied);
185
186 return copied;
187}
188
189const struct iio_ring_access_funcs kfifo_access_funcs = {
190 .mark_in_use = &iio_mark_kfifo_in_use,
191 .unmark_in_use = &iio_unmark_kfifo_in_use,
192 .store_to = &iio_store_to_kfifo,
193 .read_first_n = &iio_read_first_n_kfifo,
194 .mark_param_change = &iio_mark_update_needed_kfifo,
195 .request_update = &iio_request_update_kfifo,
196 .get_bytes_per_datum = &iio_get_bytes_per_datum_kfifo,
197 .set_bytes_per_datum = &iio_set_bytes_per_datum_kfifo,
198 .get_length = &iio_get_length_kfifo,
199 .set_length = &iio_set_length_kfifo,
200};
201EXPORT_SYMBOL(kfifo_access_funcs);
202
203MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/kfifo_buf.h b/drivers/staging/iio/kfifo_buf.h
new file mode 100644
index 00000000000..aac30539b2c
--- /dev/null
+++ b/drivers/staging/iio/kfifo_buf.h
@@ -0,0 +1,18 @@
1
2#include <linux/kfifo.h>
3#include "iio.h"
4#include "ring_generic.h"
5
6struct iio_kfifo {
7 struct iio_ring_buffer ring;
8 struct kfifo kf;
9 int use_count;
10 int update_needed;
11 struct mutex use_lock;
12};
13
14extern const struct iio_ring_access_funcs kfifo_access_funcs;
15
16struct iio_ring_buffer *iio_kfifo_allocate(struct iio_dev *indio_dev);
17void iio_kfifo_free(struct iio_ring_buffer *r);
18
diff --git a/drivers/staging/iio/light/ltr558als.c b/drivers/staging/iio/light/ltr558als.c
new file mode 100644
index 00000000000..01e410b191f
--- /dev/null
+++ b/drivers/staging/iio/light/ltr558als.c
@@ -0,0 +1,883 @@
1/* Lite-On LTR-558ALS Linux Driver
2 *
3 * Copyright (c) 2012, NVIDIA Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#include <linux/delay.h>
12#include <linux/earlysuspend.h>
13#include <linux/fs.h>
14#include <linux/i2c.h>
15#include <linux/init.h>
16#include <linux/input.h>
17#include <linux/irq.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/mutex.h>
21#include <linux/pm.h>
22#include <linux/wakelock.h>
23#include <linux/interrupt.h>
24#include <linux/slab.h>
25#include <asm/gpio.h>
26#include <asm/uaccess.h>
27
28#include "ltr558als.h"
29#include "../iio.h"
30
31#define DRIVER_VERSION "1.0"
32#define DEVICE_NAME "LTR_558ALS"
33
34struct ltr558_chip {
35 struct i2c_client *client;
36 struct mutex lock;
37 struct iio_dev *indio_dev;
38 int irq;
39
40 bool is_als_enable;
41 bool als_enabled_before_suspend;
42 int als_gainrange;
43 int als_persist;
44 int als_reading;
45 int als_high_thres;
46 int als_low_thres;
47
48 bool is_prox_enable;
49 bool prox_enabled_before_suspend;
50 int ps_gainrange;
51 int prox_persist;
52 int prox_reading;
53 int prox_low_thres;
54 int prox_high_thres;
55};
56
57static int ltr558_i2c_read_reg(struct i2c_client *client, u8 regnum)
58{
59 return i2c_smbus_read_byte_data(client, regnum);
60}
61
62static int ltr558_i2c_write_reg(struct i2c_client *client, u8 regnum, u8 value)
63{
64 int writeerror;
65
66 writeerror = i2c_smbus_write_byte_data(client, regnum, value);
67 if (writeerror < 0)
68 return writeerror;
69 else
70 return 0;
71}
72
73static int ltr558_ps_enable(struct i2c_client *client, int gainrange)
74{
75 int error;
76 int setgain;
77
78 switch (gainrange) {
79 case PS_RANGE4:
80 setgain = MODE_PS_ON_Gain4;
81 break;
82
83 case PS_RANGE8:
84 setgain = MODE_PS_ON_Gain8;
85 break;
86
87 case PS_RANGE16:
88 setgain = MODE_PS_ON_Gain16;
89 break;
90
91 case PS_RANGE1:
92 default:
93 setgain = MODE_PS_ON_Gain1;
94 break;
95 }
96
97 error = ltr558_i2c_write_reg(client, LTR558_PS_CONTR, setgain);
98 mdelay(WAKEUP_DELAY);
99 return error;
100}
101
102static int ltr558_ps_disable(struct i2c_client *client)
103{
104 return ltr558_i2c_write_reg(client, LTR558_PS_CONTR, MODE_PS_StdBy);
105}
106
107static int ltr558_ps_read(struct i2c_client *client)
108{
109 int psval_lo = 0, psval_hi = 0, psdata = 0;
110 psval_lo = ltr558_i2c_read_reg(client, LTR558_PS_DATA_0);
111 if (psval_lo < 0){
112 psdata = psval_lo;
113 goto out;
114 }
115
116 psval_hi = ltr558_i2c_read_reg(client, LTR558_PS_DATA_1);
117 if (psval_hi < 0){
118 psdata = psval_hi;
119 goto out;
120 }
121
122 psdata = ((psval_hi & 0x07) * 256) + psval_lo;
123out:
124 return psdata;
125}
126
127static int ltr558_als_enable(struct i2c_client *client, int gainrange)
128{
129 int error = -1;
130
131 if (gainrange == ALS_RANGE1_320)
132 error = ltr558_i2c_write_reg(client, LTR558_ALS_CONTR,
133 MODE_ALS_ON_Range1);
134 else if (gainrange == ALS_RANGE2_64K)
135 error = ltr558_i2c_write_reg(client, LTR558_ALS_CONTR,
136 MODE_ALS_ON_Range2);
137
138 mdelay(WAKEUP_DELAY);
139 return error;
140}
141
142static int ltr558_als_disable(struct i2c_client *client)
143{
144 return ltr558_i2c_write_reg(client, LTR558_ALS_CONTR, MODE_ALS_StdBy);
145}
146
147static int ltr558_als_read(struct i2c_client *client)
148{
149 int alsval_ch0_lo, alsval_ch0_hi;
150 int alsval_ch1_lo, alsval_ch1_hi;
151 unsigned int alsval_ch0 = 0, alsval_ch1 = 0;
152 int luxdata = 0, ratio = 0;
153 long ch0_coeff = 0, ch1_coeff = 0;
154
155 alsval_ch1_lo = ltr558_i2c_read_reg(client, LTR558_ALS_DATA_CH1_0);
156 alsval_ch1_hi = ltr558_i2c_read_reg(client, LTR558_ALS_DATA_CH1_1);
157 alsval_ch1 = (alsval_ch1_hi * 256) + alsval_ch1_lo;
158
159 alsval_ch0_lo = ltr558_i2c_read_reg(client, LTR558_ALS_DATA_CH0_0);
160 alsval_ch0_hi = ltr558_i2c_read_reg(client, LTR558_ALS_DATA_CH0_1);
161 alsval_ch0 = (alsval_ch0_hi * 256) + alsval_ch0_lo;
162
163 if (alsval_ch0 == 0 && alsval_ch1 == 0)
164 return 0;
165
166 /* lux formula */
167 ratio = (100 * alsval_ch1)/(alsval_ch1 + alsval_ch0);
168
169 if (ratio < 45) {
170 ch0_coeff = 17743;
171 ch1_coeff = -11059;
172 }
173 else if ((ratio >= 45) && (ratio < 64)) {
174 ch0_coeff = 37725;
175 ch1_coeff = 13363;
176 }
177 else if ((ratio >= 64) && (ratio < 85)) {
178 ch0_coeff = 16900;
179 ch1_coeff = 1690;
180 }
181 else if (ratio >= 85) {
182 ch0_coeff = 0;
183 ch1_coeff = 0;
184 }
185
186 luxdata = ((alsval_ch0 * ch0_coeff) - (alsval_ch1 * ch1_coeff))/10000;
187 return luxdata;
188}
189
190static bool ltr558_set_proxim_high_threshold(struct i2c_client *client,
191 u32 thresh)
192{
193 bool st;
194 st = ltr558_i2c_write_reg(client, LTR558_PS_THRES_UP_0,
195 thresh & 0xFF);
196 if (st)
197 st = ltr558_i2c_write_reg(client, LTR558_PS_THRES_UP_1,
198 (thresh >> 8) & 0x07);
199 return st;
200}
201
202static bool ltr558_set_proxim_low_threshold(struct i2c_client *client,
203 u32 thresh)
204{
205 bool st;
206 st = ltr558_i2c_write_reg(client, LTR558_PS_THRES_LOW_0,
207 thresh & 0xFF);
208 if (st)
209 st = ltr558_i2c_write_reg(client, LTR558_PS_THRES_LOW_1,
210 (thresh >> 8) & 0x07);
211 return st;
212}
213
214static bool ltr558_set_als_high_threshold(struct i2c_client *client, u32 thresh)
215{
216 bool st;
217 st = ltr558_i2c_write_reg(client, LTR558_ALS_THRES_UP_0,
218 thresh & 0xFF);
219 if (st)
220 st = ltr558_i2c_write_reg(client, LTR558_ALS_THRES_UP_1,
221 (thresh >> 8) & 0xFF);
222 return st;
223}
224
225static bool ltr558_set_als_low_threshold(struct i2c_client *client, u32 thresh)
226{
227 bool st;
228 st = ltr558_i2c_write_reg(client, LTR558_ALS_THRES_LOW_0,
229 thresh & 0xFF);
230 if (st)
231 st = ltr558_i2c_write_reg(client, LTR558_ALS_THRES_LOW_1,
232 ((thresh >> 8) & 0xFF));
233 return st;
234}
235
236/* Sysfs interface */
237
238/* proximity enable/disable */
239static ssize_t show_prox_enable(struct device *dev,
240 struct device_attribute *attr, char *buf)
241{
242 struct iio_dev *indio_dev = dev_get_drvdata(dev);
243 struct ltr558_chip *chip = indio_dev->dev_data;
244
245 dev_vdbg(dev, "%s()\n", __func__);
246 if (chip->is_prox_enable)
247 return sprintf(buf, "1\n");
248 else
249 return sprintf(buf, "0\n");
250}
251
252static ssize_t store_prox_enable(struct device *dev,
253 struct device_attribute *attr, const char *buf, size_t count)
254{
255 struct iio_dev *indio_dev = dev_get_drvdata(dev);
256 struct ltr558_chip *chip = indio_dev->dev_data;
257 struct i2c_client *client = chip->client;
258 int err = 0;
259 unsigned long lval;
260
261 dev_vdbg(dev, "%s()\n", __func__);
262
263 if (strict_strtoul(buf, 10, &lval))
264 return -EINVAL;
265 if ((lval != 1) && (lval != 0)) {
266 dev_err(dev, "illegal value %lu\n", lval);
267 return -EINVAL;
268 }
269
270 mutex_lock(&chip->lock);
271 if (lval == 1)
272 err = ltr558_ps_enable(client, PS_RANGE1);
273 else
274 err = ltr558_ps_disable(client);
275
276 if (err < 0)
277 dev_err(dev, "Error in enabling proximity\n");
278 else
279 chip->is_prox_enable = (lval) ? true : false;
280
281 mutex_unlock(&chip->lock);
282 return count;
283}
284
285/* Proximity low thresholds */
286static ssize_t show_proxim_low_threshold(struct device *dev,
287 struct device_attribute *attr, char *buf)
288{
289 struct iio_dev *indio_dev = dev_get_drvdata(dev);
290 struct ltr558_chip *chip = indio_dev->dev_data;
291
292 dev_vdbg(dev, "%s()\n", __func__);
293 return sprintf(buf, "%d\n", chip->prox_low_thres);
294}
295
296static ssize_t store_proxim_low_threshold(struct device *dev,
297 struct device_attribute *attr, const char *buf, size_t count)
298{
299 struct iio_dev *indio_dev = dev_get_drvdata(dev);
300 struct ltr558_chip *chip = indio_dev->dev_data;
301 struct i2c_client *client = chip->client;
302 bool st;
303 unsigned long lval;
304
305 dev_vdbg(dev, "%s()\n", __func__);
306
307 if (strict_strtoul(buf, 10, &lval))
308 return -EINVAL;
309
310 if ((lval > 0x7FF) || (lval < 0x0)) {
311 dev_err(dev, "The threshold is not supported\n");
312 return -EINVAL;
313 }
314
315 mutex_lock(&chip->lock);
316 st = ltr558_set_proxim_low_threshold(client, (u8)lval);
317 if (st)
318 chip->prox_low_thres = (int)lval;
319 else
320 dev_err(dev, "Error in setting proximity low threshold\n");
321
322 mutex_unlock(&chip->lock);
323 return count;
324}
325
326/* Proximity high thresholds */
327static ssize_t show_proxim_high_threshold(struct device *dev,
328 struct device_attribute *attr, char *buf)
329{
330 struct iio_dev *indio_dev = dev_get_drvdata(dev);
331 struct ltr558_chip *chip = indio_dev->dev_data;
332
333 dev_vdbg(dev, "%s()\n", __func__);
334 return sprintf(buf, "%d\n", chip->prox_high_thres);
335}
336
337static ssize_t store_proxim_high_threshold(struct device *dev,
338 struct device_attribute *attr, const char *buf, size_t count)
339{
340 struct iio_dev *indio_dev = dev_get_drvdata(dev);
341 struct ltr558_chip *chip = indio_dev->dev_data;
342 struct i2c_client *client = chip->client;
343 bool st;
344 unsigned long lval;
345
346 dev_vdbg(dev, "%s()\n", __func__);
347
348 if (strict_strtoul(buf, 10, &lval))
349 return -EINVAL;
350
351 if ((lval > 0x7FF) || (lval < 0x0)) {
352 dev_err(dev, "The threshold is not supported\n");
353 return -EINVAL;
354 }
355
356 mutex_lock(&chip->lock);
357 st = ltr558_set_proxim_high_threshold(client, lval);
358 if (st)
359 chip->prox_high_thres = (int)lval;
360 else
361 dev_err(dev, "Error in setting proximity high threshold\n");
362
363 mutex_unlock(&chip->lock);
364 return count;
365}
366
367/* als enable/disable */
368static ssize_t show_als_enable(struct device *dev,
369 struct device_attribute *attr, char *buf)
370{
371 struct iio_dev *indio_dev = dev_get_drvdata(dev);
372 struct ltr558_chip *chip = indio_dev->dev_data;
373
374 dev_vdbg(dev, "%s()\n", __func__);
375 if (chip->is_als_enable)
376 return sprintf(buf, "1\n");
377 else
378 return sprintf(buf, "0\n");
379}
380
381static ssize_t store_als_enable(struct device *dev,
382 struct device_attribute *attr, const char *buf, size_t count)
383{
384 struct iio_dev *indio_dev = dev_get_drvdata(dev);
385 struct ltr558_chip *chip = indio_dev->dev_data;
386 struct i2c_client *client = chip->client;
387 int err = 0;
388 unsigned long lval;
389
390 dev_vdbg(dev, "%s()\n", __func__);
391
392 if (strict_strtoul(buf, 10, &lval))
393 return -EINVAL;
394 if ((lval != 1) && (lval != 0)) {
395 dev_err(dev, "illegal value %lu\n", lval);
396 return -EINVAL;
397 }
398
399 mutex_lock(&chip->lock);
400 if (lval == 1)
401 err = ltr558_als_enable(client, chip->als_gainrange);
402 else
403 err = ltr558_als_disable(client);
404
405 if (err < 0)
406 dev_err(dev, "Error in enabling ALS\n");
407 else
408 chip->is_als_enable = (lval) ? true : false;
409
410 mutex_unlock(&chip->lock);
411 return count;
412}
413
414/* als low thresholds */
415static ssize_t show_als_low_threshold(struct device *dev,
416 struct device_attribute *attr, char *buf)
417{
418 struct iio_dev *indio_dev = dev_get_drvdata(dev);
419 struct ltr558_chip *chip = indio_dev->dev_data;
420
421 dev_vdbg(dev, "%s()\n", __func__);
422 return sprintf(buf, "%d\n", chip->als_low_thres);
423}
424
425static ssize_t store_als_low_threshold(struct device *dev,
426 struct device_attribute *attr, const char *buf, size_t count)
427{
428 struct iio_dev *indio_dev = dev_get_drvdata(dev);
429 struct ltr558_chip *chip = indio_dev->dev_data;
430 struct i2c_client *client = chip->client;
431 bool st;
432 unsigned long lval;
433
434 dev_vdbg(dev, "%s()\n", __func__);
435
436 if (strict_strtoul(buf, 10, &lval))
437 return -EINVAL;
438
439 if ((lval > 0xFFFF) || (lval < 0x0)) {
440 dev_err(dev, "The ALS threshold is not supported\n");
441 return -EINVAL;
442 }
443
444 mutex_lock(&chip->lock);
445 st = ltr558_set_als_low_threshold(client, (int)lval);
446 if (st)
447 chip->als_low_thres = (int)lval;
448 else
449 dev_err(dev, "Error in setting als low threshold\n");
450 mutex_unlock(&chip->lock);
451 return count;
452}
453
454/* Als high thresholds */
455static ssize_t show_als_high_threshold(struct device *dev,
456 struct device_attribute *attr, char *buf)
457{
458 struct iio_dev *indio_dev = dev_get_drvdata(dev);
459 struct ltr558_chip *chip = indio_dev->dev_data;
460
461 dev_vdbg(dev, "%s()\n", __func__);
462 return sprintf(buf, "%d\n", chip->als_high_thres);
463}
464
465static ssize_t store_als_high_threshold(struct device *dev,
466 struct device_attribute *attr, const char *buf, size_t count)
467{
468 struct iio_dev *indio_dev = dev_get_drvdata(dev);
469 struct ltr558_chip *chip = indio_dev->dev_data;
470 struct i2c_client *client = chip->client;
471 bool st;
472 unsigned long lval;
473
474 dev_vdbg(dev, "%s()\n", __func__);
475
476 if (strict_strtoul(buf, 10, &lval))
477 return -EINVAL;
478
479 if ((lval > 0xFFFF) || (lval < 0x0)) {
480 dev_err(dev, "The als threshold is not supported\n");
481 return -EINVAL;
482 }
483
484 mutex_lock(&chip->lock);
485 st = ltr558_set_als_high_threshold(client, (int)lval);
486 if (st)
487 chip->als_high_thres = (int)lval;
488 else
489 dev_err(dev, "Error in setting als high threshold\n");
490 mutex_unlock(&chip->lock);
491 return count;
492}
493
494/* Proximity persist */
495static ssize_t show_proxim_persist(struct device *dev,
496 struct device_attribute *attr, char *buf)
497{
498 struct iio_dev *indio_dev = dev_get_drvdata(dev);
499 struct ltr558_chip *chip = indio_dev->dev_data;
500
501 dev_vdbg(dev, "%s()\n", __func__);
502 return sprintf(buf, "%d\n", chip->prox_persist);
503}
504
505static ssize_t store_proxim_persist(struct device *dev,
506 struct device_attribute *attr, const char *buf, size_t count)
507{
508 struct iio_dev *indio_dev = dev_get_drvdata(dev);
509 struct ltr558_chip *chip = indio_dev->dev_data;
510 unsigned long lval;
511
512 dev_vdbg(dev, "%s()\n", __func__);
513
514 if (strict_strtoul(buf, 10, &lval))
515 return -EINVAL;
516
517 if ((lval > 16) || (lval < 0x0)) {
518 dev_err(dev, "The proximity persist is not supported\n");
519 return -EINVAL;
520 }
521
522 mutex_lock(&chip->lock);
523 chip->prox_persist = (int)lval;
524 mutex_unlock(&chip->lock);
525 return count;
526}
527
528/* als/ir persist */
529static ssize_t show_als_persist(struct device *dev,
530 struct device_attribute *attr, char *buf)
531{
532 struct iio_dev *indio_dev = dev_get_drvdata(dev);
533 struct ltr558_chip *chip = indio_dev->dev_data;
534
535 dev_vdbg(dev, "%s()\n", __func__);
536 return sprintf(buf, "%d\n", chip->als_persist);
537}
538
539static ssize_t store_als_persist(struct device *dev,
540 struct device_attribute *attr, const char *buf, size_t count)
541{
542 struct iio_dev *indio_dev = dev_get_drvdata(dev);
543 struct ltr558_chip *chip = indio_dev->dev_data;
544 unsigned long lval;
545
546 dev_vdbg(dev, "%s()\n", __func__);
547
548 if (strict_strtoul(buf, 10, &lval))
549 return -EINVAL;
550
551 if ((lval > 16) || (lval < 0x0)) {
552 dev_err(dev, "The als persist is not supported\n");
553 return -EINVAL;
554 }
555
556 mutex_lock(&chip->lock);
557 chip->als_persist = (int)lval;
558 mutex_unlock(&chip->lock);
559 return count;
560}
561
562/* Display proxim data */
563static ssize_t show_proxim_data(struct device *dev,
564 struct device_attribute *attr, char *buf)
565{
566 struct iio_dev *indio_dev = dev_get_drvdata(dev);
567 struct ltr558_chip *chip = indio_dev->dev_data;
568 int prox_data = 0;
569 ssize_t buf_count = 0;
570
571 dev_vdbg(dev, "%s()\n", __func__);
572 mutex_lock(&chip->lock);
573
574 if (chip->is_prox_enable) {
575 prox_data = ltr558_ps_read(chip->client);
576 chip->prox_reading = prox_data;
577 buf_count = sprintf(buf, "%d\n", prox_data);
578 }
579 else
580 buf_count = sprintf(buf, "%d\n", chip->prox_reading);
581 mutex_unlock(&chip->lock);
582 return buf_count;
583}
584
585/* Display als data */
586static ssize_t show_als_data(struct device *dev,
587 struct device_attribute *attr, char *buf)
588{
589 struct iio_dev *indio_dev = dev_get_drvdata(dev);
590 struct ltr558_chip *chip = indio_dev->dev_data;
591 ssize_t buf_count = 0;
592 int als_data = 0;
593
594 dev_vdbg(dev, "%s()\n", __func__);
595
596 mutex_lock(&chip->lock);
597 if (chip->is_als_enable) {
598 als_data = ltr558_als_read(chip->client);
599 buf_count = sprintf(buf, "%d\n", als_data);
600 chip->als_reading = als_data;
601 }
602 else
603 buf_count = sprintf(buf, "%d\n", chip->als_reading);
604 mutex_unlock(&chip->lock);
605
606 return buf_count;
607}
608
609/* Read name */
610static ssize_t show_name(struct device *dev,
611 struct device_attribute *attr, char *buf)
612{
613 struct iio_dev *indio_dev = dev_get_drvdata(dev);
614 struct ltr558_chip *chip = indio_dev->dev_data;
615 return sprintf(buf, "%s\n", chip->client->name);
616}
617
618static IIO_DEVICE_ATTR(proximity_low_threshold, S_IRUGO | S_IWUSR,
619 show_proxim_low_threshold, store_proxim_low_threshold, 0);
620static IIO_DEVICE_ATTR(proximity_high_threshold, S_IRUGO | S_IWUSR,
621 show_proxim_high_threshold, store_proxim_high_threshold, 0);
622static IIO_DEVICE_ATTR(proximity_persist, S_IRUGO | S_IWUSR,
623 show_proxim_persist, store_proxim_persist, 0);
624static IIO_DEVICE_ATTR(proximity_enable, S_IRUGO | S_IWUSR,
625 show_prox_enable, store_prox_enable, 0);
626static IIO_DEVICE_ATTR(proximity_value, S_IRUGO,
627 show_proxim_data, NULL, 0);
628
629static IIO_DEVICE_ATTR(als_low_threshold, S_IRUGO | S_IWUSR,
630 show_als_low_threshold, store_als_low_threshold, 0);
631static IIO_DEVICE_ATTR(als_high_threshold, S_IRUGO | S_IWUSR,
632 show_als_high_threshold, store_als_high_threshold, 0);
633static IIO_DEVICE_ATTR(als_persist, S_IRUGO | S_IWUSR,
634 show_als_persist, store_als_persist, 0);
635static IIO_DEVICE_ATTR(als_enable, S_IRUGO | S_IWUSR,
636 show_als_enable, store_als_enable, 0);
637static IIO_DEVICE_ATTR(als_value, S_IRUGO,
638 show_als_data, NULL, 0);
639
640static IIO_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
641
642static struct attribute *ltr558_attributes[] = {
643 &iio_dev_attr_name.dev_attr.attr,
644
645 &iio_dev_attr_als_low_threshold.dev_attr.attr,
646 &iio_dev_attr_als_high_threshold.dev_attr.attr,
647 &iio_dev_attr_als_enable.dev_attr.attr,
648 &iio_dev_attr_als_persist.dev_attr.attr,
649 &iio_dev_attr_als_value.dev_attr.attr,
650
651 &iio_dev_attr_proximity_low_threshold.dev_attr.attr,
652 &iio_dev_attr_proximity_high_threshold.dev_attr.attr,
653 &iio_dev_attr_proximity_enable.dev_attr.attr,
654 &iio_dev_attr_proximity_persist.dev_attr.attr,
655 &iio_dev_attr_proximity_value.dev_attr.attr,
656 NULL
657};
658
659static const struct attribute_group ltr558_group = {
660 .attrs = ltr558_attributes,
661};
662
663static int ltr558_chip_init(struct i2c_client *client)
664{
665 struct ltr558_chip *chip = i2c_get_clientdata(client);
666 int error = 0;
667
668 mdelay(PON_DELAY);
669
670 chip->is_prox_enable = 0;
671 chip->prox_low_thres = 0;
672 chip->prox_high_thres = 0x7FF;
673 chip->prox_reading = 0;
674
675 chip->als_low_thres = 0;
676 chip->als_high_thres = 0xFFFF;
677 chip->als_reading = 0;
678
679 chip->is_als_enable = 0;
680 chip->prox_persist = 0;
681 chip->als_persist = 0;
682
683 /* Enable PS to Gain1 at startup */
684 chip->ps_gainrange = PS_RANGE1;
685 error = ltr558_ps_enable(client, chip->ps_gainrange);
686 if (error < 0)
687 goto out;
688
689
690 /* Enable ALS to Full Range at startup */
691 chip->als_gainrange = ALS_RANGE2_64K;
692 error = ltr558_als_enable(client, chip->als_gainrange);
693 if (error < 0)
694 goto out;
695
696out:
697 return error;
698}
699
700static const struct iio_info ltr558_info = {
701 .attrs = &ltr558_group,
702 .driver_module = THIS_MODULE,
703};
704
705static irqreturn_t threshold_isr(int irq, void *irq_data)
706{
707 struct ltr558_chip *chip = (struct ltr558_chip *)irq_data;
708 s32 int_reg;
709 struct i2c_client *client = chip->client;
710
711 int_reg = i2c_smbus_read_byte_data(client, LTR558_ALS_PS_STATUS);
712 if (int_reg < 0) {
713 dev_err(&client->dev, "Error in reading register %d, error %d\n",
714 LTR558_ALS_PS_STATUS, int_reg);
715 return IRQ_HANDLED;
716 }
717
718 if (int_reg & STATUS_ALS_INT_TRIGGER) {
719 if (int_reg & STATUS_ALS_NEW_DATA)
720 chip->als_reading = ltr558_als_read(client);
721 }
722
723 if (int_reg & STATUS_PS_INT_TRIGGER) {
724 if (int_reg & STATUS_PS_NEW_DATA)
725 chip->prox_reading = ltr558_ps_read(client);
726 }
727
728 return IRQ_HANDLED;
729}
730
731static int ltr558_probe(struct i2c_client *client,
732 const struct i2c_device_id *id)
733{
734 int ret = 0;
735 struct ltr558_chip *chip;
736
737 /* data memory allocation */
738 chip = kzalloc(sizeof(struct ltr558_chip), GFP_KERNEL);
739 if (chip == NULL) {
740 printk(KERN_ALERT "%s: LTR-558ALS kzalloc failed.\n", __func__);
741 ret = -ENOMEM;
742 goto exit;
743 }
744
745 i2c_set_clientdata(client, chip);
746 chip->client = client;
747 chip->irq = client->irq;
748
749 if (chip->irq > 0) {
750 ret = request_threaded_irq(chip->irq, NULL, threshold_isr,
751 IRQF_SHARED, "LTR558_ALS", chip);
752 if (ret) {
753 dev_err(&client->dev, "Unable to register irq %d; "
754 "ret %d\n", chip->irq, ret);
755 goto exit_free;
756 }
757 }
758
759 mutex_init(&chip->lock);
760
761 ret = ltr558_chip_init(client);
762 if (ret)
763 goto exit_free;
764
765 chip->indio_dev = iio_allocate_device(0);
766 if (!chip->indio_dev) {
767 dev_err(&client->dev, "iio allocation fails\n");
768 goto exit_irq;
769 }
770
771 chip->indio_dev->info = &ltr558_info;
772 chip->indio_dev->dev.parent = &client->dev;
773 chip->indio_dev->dev_data = (void *)(chip);
774 chip->indio_dev->modes = INDIO_DIRECT_MODE;
775 ret = iio_device_register(chip->indio_dev);
776 if (ret) {
777 dev_err(&client->dev, "iio registration fails\n");
778 goto exit_iio_free;
779 }
780
781 dev_dbg(&client->dev, "%s() success\n", __func__);
782 return 0;
783
784exit_iio_free:
785 iio_free_device(chip->indio_dev);
786exit_irq:
787 if (chip->irq > 0)
788 free_irq(chip->irq, chip);
789exit_free:
790 kfree(chip);
791exit:
792 return ret;
793}
794
795
796static int ltr558_remove(struct i2c_client *client)
797{
798 struct ltr558_chip *chip = i2c_get_clientdata(client);
799
800 dev_dbg(&client->dev, "%s()\n", __func__);
801 iio_device_unregister(chip->indio_dev);
802 if (chip->irq > 0)
803 free_irq(chip->irq, chip);
804 ltr558_ps_disable(client);
805 ltr558_als_disable(client);
806 kfree(chip);
807 return 0;
808}
809
810
811static int ltr558_suspend(struct i2c_client *client, pm_message_t mesg)
812{
813 struct ltr558_chip *chip = i2c_get_clientdata(client);
814 int ret;
815
816 if (chip->is_als_enable == 1)
817 chip->als_enabled_before_suspend = 1;
818 if (chip->is_prox_enable == 1)
819 chip->prox_enabled_before_suspend = 1;
820
821 ret = ltr558_ps_disable(client);
822 if (ret == 0)
823 ret = ltr558_als_disable(client);
824
825 return ret;
826}
827
828
829static int ltr558_resume(struct i2c_client *client)
830{
831 struct ltr558_chip *chip = i2c_get_clientdata(client);
832 int error = 0;
833
834 mdelay(PON_DELAY);
835
836 if (chip->prox_enabled_before_suspend == 1) {
837 error = ltr558_ps_enable(client, chip->ps_gainrange);
838 if (error < 0)
839 goto out;
840 }
841
842 if (chip->als_enabled_before_suspend == 1) {
843 error = ltr558_als_enable(client, chip->als_gainrange);
844 }
845out:
846 return error;
847}
848
849
850static const struct i2c_device_id ltr558_id[] = {
851 { DEVICE_NAME, 0 },
852 {}
853};
854
855
856static struct i2c_driver ltr558_driver = {
857 .class = I2C_CLASS_HWMON,
858 .probe = ltr558_probe,
859 .remove = ltr558_remove,
860 .id_table = ltr558_id,
861 .driver = {
862 .owner = THIS_MODULE,
863 .name = DEVICE_NAME,
864 },
865 .suspend = ltr558_suspend,
866 .resume = ltr558_resume,
867};
868
869
870static int __init ltr558_driverinit(void)
871{
872 return i2c_add_driver(&ltr558_driver);
873}
874
875
876static void __exit ltr558_driverexit(void)
877{
878 i2c_del_driver(&ltr558_driver);
879}
880
881
882module_init(ltr558_driverinit)
883module_exit(ltr558_driverexit)
diff --git a/drivers/staging/iio/light/ltr558als.h b/drivers/staging/iio/light/ltr558als.h
new file mode 100644
index 00000000000..17e1b903f66
--- /dev/null
+++ b/drivers/staging/iio/light/ltr558als.h
@@ -0,0 +1,76 @@
1/* Lite-On LTR-558ALS Linux Driver
2 *
3 * Copyright (c) 2012, NVIDIA Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#ifndef _LTR558_H
12#define _LTR558_H
13
14
15/* LTR-558 Registers */
16#define LTR558_ALS_CONTR 0x80
17#define LTR558_PS_CONTR 0x81
18#define LTR558_PS_LED 0x82
19#define LTR558_PS_N_PULSES 0x83
20#define LTR558_PS_MEAS_RATE 0x84
21#define LTR558_ALS_MEAS_RATE 0x85
22#define LTR558_MANUFACTURER_ID 0x87
23
24#define LTR558_INTERRUPT 0x8F
25#define LTR558_PS_THRES_UP_0 0x90
26#define LTR558_PS_THRES_UP_1 0x91
27#define LTR558_PS_THRES_LOW_0 0x92
28#define LTR558_PS_THRES_LOW_1 0x93
29
30#define LTR558_ALS_THRES_UP_0 0x97
31#define LTR558_ALS_THRES_UP_1 0x98
32#define LTR558_ALS_THRES_LOW_0 0x99
33#define LTR558_ALS_THRES_LOW_1 0x9A
34
35#define LTR558_INTERRUPT_PERSIST 0x9E
36
37/* 558's Read Only Registers */
38#define LTR558_ALS_DATA_CH1_0 0x88
39#define LTR558_ALS_DATA_CH1_1 0x89
40#define LTR558_ALS_DATA_CH0_0 0x8A
41#define LTR558_ALS_DATA_CH0_1 0x8B
42#define LTR558_ALS_PS_STATUS 0x8C
43#define LTR558_PS_DATA_0 0x8D
44#define LTR558_PS_DATA_1 0x8E
45
46/* ALS PS STATUS 0x8C */
47#define STATUS_ALS_GAIN_RANGE1 0x10
48#define STATUS_ALS_INT_TRIGGER 0x08
49#define STATUS_ALS_NEW_DATA 0x04
50#define STATUS_PS_INT_TRIGGER 0x02
51#define STATUS_PS_NEW_DATA 0x01
52
53/* Basic Operating Modes */
54#define MODE_ALS_ON_Range1 0x0B
55#define MODE_ALS_ON_Range2 0x03
56#define MODE_ALS_StdBy 0x00
57
58#define MODE_PS_ON_Gain1 0x03
59#define MODE_PS_ON_Gain4 0x07
60#define MODE_PS_ON_Gain8 0x0B
61#define MODE_PS_ON_Gain16 0x0F
62#define MODE_PS_StdBy 0x00
63
64#define PS_RANGE1 1
65#define PS_RANGE4 2
66#define PS_RANGE8 4
67#define PS_RANGE16 8
68
69#define ALS_RANGE1_320 1
70#define ALS_RANGE2_64K 2
71
72/* Power On response time in ms */
73#define PON_DELAY 600
74#define WAKEUP_DELAY 10
75
76#endif
diff --git a/drivers/staging/iio/magnetometer/magnet.h b/drivers/staging/iio/magnetometer/magnet.h
new file mode 100644
index 00000000000..1260eb7bd41
--- /dev/null
+++ b/drivers/staging/iio/magnetometer/magnet.h
@@ -0,0 +1,31 @@
1
2#include "../sysfs.h"
3
4/* Magnetometer types of attribute */
5
6#define IIO_DEV_ATTR_MAGN_X_OFFSET(_mode, _show, _store, _addr) \
7 IIO_DEVICE_ATTR(magn_x_offset, _mode, _show, _store, _addr)
8
9#define IIO_DEV_ATTR_MAGN_Y_OFFSET(_mode, _show, _store, _addr) \
10 IIO_DEVICE_ATTR(magn_y_offset, _mode, _show, _store, _addr)
11
12#define IIO_DEV_ATTR_MAGN_Z_OFFSET(_mode, _show, _store, _addr) \
13 IIO_DEVICE_ATTR(magn_z_offset, _mode, _show, _store, _addr)
14
15#define IIO_DEV_ATTR_MAGN_X_SCALE(_mode, _show, _store, _addr) \
16 IIO_DEVICE_ATTR(magn_x_scale, _mode, _show, _store, _addr)
17
18#define IIO_DEV_ATTR_MAGN_Y_SCALE(_mode, _show, _store, _addr) \
19 IIO_DEVICE_ATTR(magn_y_scale, _mode, _show, _store, _addr)
20
21#define IIO_DEV_ATTR_MAGN_Z_SCALE(_mode, _show, _store, _addr) \
22 IIO_DEVICE_ATTR(magn_z_scale, _mode, _show, _store, _addr)
23
24#define IIO_DEV_ATTR_MAGN_X(_show, _addr) \
25 IIO_DEVICE_ATTR(magn_x_raw, S_IRUGO, _show, NULL, _addr)
26
27#define IIO_DEV_ATTR_MAGN_Y(_show, _addr) \
28 IIO_DEVICE_ATTR(magn_y_raw, S_IRUGO, _show, NULL, _addr)
29
30#define IIO_DEV_ATTR_MAGN_Z(_show, _addr) \
31 IIO_DEVICE_ATTR(magn_z_raw, S_IRUGO, _show, NULL, _addr)
diff --git a/drivers/staging/iio/resolver/ad2s120x.c b/drivers/staging/iio/resolver/ad2s120x.c
new file mode 100644
index 00000000000..bed4c725f2d
--- /dev/null
+++ b/drivers/staging/iio/resolver/ad2s120x.c
@@ -0,0 +1,177 @@
1/*
2 * ad2s120x.c simple support for the ADI Resolver to Digital Converters: AD2S1200/1205
3 *
4 * Copyright (c) 2010-2010 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#include <linux/types.h>
12#include <linux/mutex.h>
13#include <linux/device.h>
14#include <linux/spi/spi.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17#include <linux/delay.h>
18#include <linux/gpio.h>
19
20#include "../iio.h"
21#include "../sysfs.h"
22
23#define DRV_NAME "ad2s120x"
24
25/* input pin sample and rdvel is controlled by driver */
26#define AD2S120X_PN 2
27
28/* input clock on serial interface */
29#define AD2S120X_HZ 8192000
30/* clock period in nano second */
31#define AD2S120X_TSCLK (1000000000/AD2S120X_HZ)
32
33struct ad2s120x_state {
34 struct mutex lock;
35 struct spi_device *sdev;
36 int sample;
37 int rdvel;
38 u8 rx[2] ____cacheline_aligned;
39};
40
41static ssize_t ad2s120x_show_val(struct device *dev,
42 struct device_attribute *attr, char *buf)
43{
44 int ret = 0;
45 ssize_t len = 0;
46 u16 pos;
47 s16 vel;
48 u8 status;
49 struct ad2s120x_state *st = iio_priv(dev_get_drvdata(dev));
50 struct iio_dev_attr *iattr = to_iio_dev_attr(attr);
51
52 mutex_lock(&st->lock);
53
54 gpio_set_value(st->sample, 0);
55 /* delay (6 * AD2S120X_TSCLK + 20) nano seconds */
56 udelay(1);
57 gpio_set_value(st->sample, 1);
58 gpio_set_value(st->rdvel, iattr->address);
59 ret = spi_read(st->sdev, st->rx, 2);
60 if (ret < 0)
61 goto error_ret;
62 status = st->rx[1];
63 if (iattr->address)
64 pos = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
65 else {
66 vel = (st->rx[0] & 0x80) ? 0xf000 : 0;
67 vel |= (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
68 }
69 len = sprintf(buf, "%d %c%c%c%c ", iattr->address ? pos : vel,
70 (status & 0x8) ? 'P' : 'V',
71 (status & 0x4) ? 'd' : '_',
72 (status & 0x2) ? 'l' : '_',
73 (status & 0x1) ? '1' : '0');
74error_ret:
75 /* delay (2 * AD2S120X_TSCLK + 20) ns for sample pulse */
76 udelay(1);
77 mutex_unlock(&st->lock);
78
79 return ret ? ret : len;
80}
81
82static IIO_DEVICE_ATTR(pos, S_IRUGO, ad2s120x_show_val, NULL, 1);
83static IIO_DEVICE_ATTR(vel, S_IRUGO, ad2s120x_show_val, NULL, 0);
84
85static struct attribute *ad2s120x_attributes[] = {
86 &iio_dev_attr_pos.dev_attr.attr,
87 &iio_dev_attr_vel.dev_attr.attr,
88 NULL,
89};
90
91static const struct attribute_group ad2s120x_attribute_group = {
92 .attrs = ad2s120x_attributes,
93};
94
95static const struct iio_info ad2s120x_info = {
96 .attrs = &ad2s120x_attribute_group,
97 .driver_module = THIS_MODULE,
98};
99
100static int __devinit ad2s120x_probe(struct spi_device *spi)
101{
102 struct ad2s120x_state *st;
103 struct iio_dev *indio_dev;
104 int pn, ret = 0;
105 unsigned short *pins = spi->dev.platform_data;
106
107 for (pn = 0; pn < AD2S120X_PN; pn++)
108 if (gpio_request_one(pins[pn], GPIOF_DIR_OUT, DRV_NAME)) {
109 pr_err("%s: request gpio pin %d failed\n",
110 DRV_NAME, pins[pn]);
111 goto error_ret;
112 }
113 indio_dev = iio_allocate_device(sizeof(*st));
114 if (indio_dev == NULL) {
115 ret = -ENOMEM;
116 goto error_ret;
117 }
118 spi_set_drvdata(spi, indio_dev);
119 st = iio_priv(indio_dev);
120 mutex_init(&st->lock);
121 st->sdev = spi;
122 st->sample = pins[0];
123 st->rdvel = pins[1];
124
125 indio_dev->dev.parent = &spi->dev;
126 indio_dev->info = &ad2s120x_info;
127 indio_dev->modes = INDIO_DIRECT_MODE;
128
129 ret = iio_device_register(indio_dev);
130 if (ret)
131 goto error_free_dev;
132
133 spi->max_speed_hz = AD2S120X_HZ;
134 spi->mode = SPI_MODE_3;
135 spi_setup(spi);
136
137 return 0;
138
139error_free_dev:
140 iio_free_device(indio_dev);
141error_ret:
142 for (--pn; pn >= 0; pn--)
143 gpio_free(pins[pn]);
144 return ret;
145}
146
147static int __devexit ad2s120x_remove(struct spi_device *spi)
148{
149 iio_device_unregister(spi_get_drvdata(spi));
150
151 return 0;
152}
153
154static struct spi_driver ad2s120x_driver = {
155 .driver = {
156 .name = DRV_NAME,
157 .owner = THIS_MODULE,
158 },
159 .probe = ad2s120x_probe,
160 .remove = __devexit_p(ad2s120x_remove),
161};
162
163static __init int ad2s120x_spi_init(void)
164{
165 return spi_register_driver(&ad2s120x_driver);
166}
167module_init(ad2s120x_spi_init);
168
169static __exit void ad2s120x_spi_exit(void)
170{
171 spi_unregister_driver(&ad2s120x_driver);
172}
173module_exit(ad2s120x_spi_exit);
174
175MODULE_AUTHOR("Graff Yang <graff.yang@gmail.com>");
176MODULE_DESCRIPTION("Analog Devices AD2S1200/1205 Resolver to Digital SPI driver");
177MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/ring_generic.h b/drivers/staging/iio/ring_generic.h
new file mode 100644
index 00000000000..3f26f7175b6
--- /dev/null
+++ b/drivers/staging/iio/ring_generic.h
@@ -0,0 +1,288 @@
1/* The industrial I/O core - generic ring buffer interfaces.
2 *
3 * Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 */
9
10#ifndef _IIO_RING_GENERIC_H_
11#define _IIO_RING_GENERIC_H_
12#include "iio.h"
13
14#ifdef CONFIG_IIO_RING_BUFFER
15
16struct iio_ring_buffer;
17
18/**
19 * struct iio_ring_access_funcs - access functions for ring buffers.
20 * @mark_in_use: reference counting, typically to prevent module removal
21 * @unmark_in_use: reduce reference count when no longer using ring buffer
22 * @store_to: actually store stuff to the ring buffer
23 * @read_last: get the last element stored
24 * @read_first_n: try to get a specified number of elements (must exist)
25 * @mark_param_change: notify ring that some relevant parameter has changed
26 * Often this means the underlying storage may need to
27 * change.
28 * @request_update: if a parameter change has been marked, update underlying
29 * storage.
30 * @get_bytes_per_datum:get current bytes per datum
31 * @set_bytes_per_datum:set number of bytes per datum
32 * @get_length: get number of datums in ring
33 * @set_length: set number of datums in ring
34 * @is_enabled: query if ring is currently being used
35 * @enable: enable the ring
36 *
37 * The purpose of this structure is to make the ring buffer element
38 * modular as event for a given driver, different usecases may require
39 * different ring designs (space efficiency vs speed for example).
40 *
41 * It is worth noting that a given ring implementation may only support a small
42 * proportion of these functions. The core code 'should' cope fine with any of
43 * them not existing.
44 **/
45struct iio_ring_access_funcs {
46 void (*mark_in_use)(struct iio_ring_buffer *ring);
47 void (*unmark_in_use)(struct iio_ring_buffer *ring);
48
49 int (*store_to)(struct iio_ring_buffer *ring, u8 *data, s64 timestamp);
50 int (*read_last)(struct iio_ring_buffer *ring, u8 *data);
51 int (*read_first_n)(struct iio_ring_buffer *ring,
52 size_t n,
53 char __user *buf);
54
55 int (*mark_param_change)(struct iio_ring_buffer *ring);
56 int (*request_update)(struct iio_ring_buffer *ring);
57
58 int (*get_bytes_per_datum)(struct iio_ring_buffer *ring);
59 int (*set_bytes_per_datum)(struct iio_ring_buffer *ring, size_t bpd);
60 int (*get_length)(struct iio_ring_buffer *ring);
61 int (*set_length)(struct iio_ring_buffer *ring, int length);
62
63 int (*is_enabled)(struct iio_ring_buffer *ring);
64 int (*enable)(struct iio_ring_buffer *ring);
65};
66
67struct iio_ring_setup_ops {
68 int (*preenable)(struct iio_dev *);
69 int (*postenable)(struct iio_dev *);
70 int (*predisable)(struct iio_dev *);
71 int (*postdisable)(struct iio_dev *);
72};
73
74/**
75 * struct iio_ring_buffer - general ring buffer structure
76 * @dev: ring buffer device struct
77 * @indio_dev: industrial I/O device structure
78 * @owner: module that owns the ring buffer (for ref counting)
79 * @length: [DEVICE] number of datums in ring
80 * @bytes_per_datum: [DEVICE] size of individual datum including timestamp
81 * @bpe: [DEVICE] size of individual channel value
82 * @scan_el_attrs: [DRIVER] control of scan elements if that scan mode
83 * control method is used
84 * @scan_count: [INTERN] the number of elements in the current scan mode
85 * @scan_mask: [INTERN] bitmask used in masking scan mode elements
86 * @scan_timestamp: [INTERN] does the scan mode include a timestamp
87 * @access_handler: [INTERN] chrdev access handling
88 * @access: [DRIVER] ring access functions associated with the
89 * implementation.
90 * @preenable: [DRIVER] function to run prior to marking ring enabled
91 * @postenable: [DRIVER] function to run after marking ring enabled
92 * @predisable: [DRIVER] function to run prior to marking ring disabled
93 * @postdisable: [DRIVER] function to run after marking ring disabled
94 **/
95struct iio_ring_buffer {
96 struct device dev;
97 struct iio_dev *indio_dev;
98 struct module *owner;
99 int length;
100 int bytes_per_datum;
101 int bpe;
102 struct attribute_group *scan_el_attrs;
103 int scan_count;
104 unsigned long scan_mask;
105 bool scan_timestamp;
106 struct iio_handler access_handler;
107 const struct iio_ring_access_funcs *access;
108 const struct iio_ring_setup_ops *setup_ops;
109 struct list_head scan_el_dev_attr_list;
110
111 wait_queue_head_t pollq;
112 bool stufftoread;
113};
114
115/**
116 * iio_ring_buffer_init() - Initialize the buffer structure
117 * @ring: buffer to be initialized
118 * @dev_info: the iio device the buffer is assocated with
119 **/
120void iio_ring_buffer_init(struct iio_ring_buffer *ring,
121 struct iio_dev *dev_info);
122
123/**
124 * __iio_update_ring_buffer() - update common elements of ring buffers
125 * @ring: ring buffer that is the event source
126 * @bytes_per_datum: size of individual datum including timestamp
127 * @length: number of datums in ring
128 **/
129static inline void __iio_update_ring_buffer(struct iio_ring_buffer *ring,
130 int bytes_per_datum, int length)
131{
132 ring->bytes_per_datum = bytes_per_datum;
133 ring->length = length;
134}
135
136/*
137 * These are mainly provided to allow for a change of implementation if a device
138 * has a large number of scan elements
139 */
140#define IIO_MAX_SCAN_LENGTH 31
141
142/* note 0 used as error indicator as it doesn't make sense. */
143static inline u32 iio_scan_mask_match(u32 *av_masks, u32 mask)
144{
145 while (*av_masks) {
146 if (!(~*av_masks & mask))
147 return *av_masks;
148 av_masks++;
149 }
150 return 0;
151}
152
153static inline int iio_scan_mask_query(struct iio_ring_buffer *ring, int bit)
154{
155 struct iio_dev *dev_info = ring->indio_dev;
156 u32 mask;
157
158 if (bit > IIO_MAX_SCAN_LENGTH)
159 return -EINVAL;
160
161 if (!ring->scan_mask)
162 return 0;
163
164 if (dev_info->available_scan_masks)
165 mask = iio_scan_mask_match(dev_info->available_scan_masks,
166 ring->scan_mask);
167 else
168 mask = ring->scan_mask;
169
170 if (!mask)
171 return -EINVAL;
172
173 return !!(mask & (1 << bit));
174};
175
176/**
177 * iio_scan_mask_set() - set particular bit in the scan mask
178 * @ring: the ring buffer whose scan mask we are interested in
179 * @bit: the bit to be set.
180 **/
181static inline int iio_scan_mask_set(struct iio_ring_buffer *ring, int bit)
182{
183 struct iio_dev *dev_info = ring->indio_dev;
184 u32 mask;
185 u32 trialmask = ring->scan_mask | (1 << bit);
186
187 if (bit > IIO_MAX_SCAN_LENGTH)
188 return -EINVAL;
189 if (dev_info->available_scan_masks) {
190 mask = iio_scan_mask_match(dev_info->available_scan_masks,
191 trialmask);
192 if (!mask)
193 return -EINVAL;
194 }
195 ring->scan_mask = trialmask;
196 ring->scan_count++;
197
198 return 0;
199};
200
201/**
202 * iio_put_ring_buffer() - notify done with buffer
203 * @ring: the buffer we are done with.
204 **/
205static inline void iio_put_ring_buffer(struct iio_ring_buffer *ring)
206{
207 put_device(&ring->dev);
208};
209
210#define to_iio_ring_buffer(d) \
211 container_of(d, struct iio_ring_buffer, dev)
212
213/**
214 * iio_ring_buffer_register_ex() - register the buffer with IIO core
215 * @ring: the buffer to be registered
216 * @id: the id of the buffer (typically 0)
217 **/
218int iio_ring_buffer_register_ex(struct iio_ring_buffer *ring, int id,
219 const struct iio_chan_spec *channels,
220 int num_channels);
221
222void iio_ring_access_release(struct device *dev);
223
224/**
225 * iio_ring_buffer_unregister() - unregister the buffer from IIO core
226 * @ring: the buffer to be unregistered
227 **/
228void iio_ring_buffer_unregister(struct iio_ring_buffer *ring);
229
230/**
231 * iio_read_ring_length() - attr func to get number of datums in the buffer
232 **/
233ssize_t iio_read_ring_length(struct device *dev,
234 struct device_attribute *attr,
235 char *buf);
236/**
237 * iio_write_ring_length() - attr func to set number of datums in the buffer
238 **/
239ssize_t iio_write_ring_length(struct device *dev,
240 struct device_attribute *attr,
241 const char *buf,
242 size_t len);
243/**
244 * iio_read_ring_bytes_per_datum() - attr for number of bytes in whole datum
245 **/
246ssize_t iio_read_ring_bytes_per_datum(struct device *dev,
247 struct device_attribute *attr,
248 char *buf);
249/**
250 * iio_store_ring_enable() - attr to turn the buffer on
251 **/
252ssize_t iio_store_ring_enable(struct device *dev,
253 struct device_attribute *attr,
254 const char *buf,
255 size_t len);
256/**
257 * iio_show_ring_enable() - attr to see if the buffer is on
258 **/
259ssize_t iio_show_ring_enable(struct device *dev,
260 struct device_attribute *attr,
261 char *buf);
262#define IIO_RING_LENGTH_ATTR DEVICE_ATTR(length, S_IRUGO | S_IWUSR, \
263 iio_read_ring_length, \
264 iio_write_ring_length)
265#define IIO_RING_BYTES_PER_DATUM_ATTR DEVICE_ATTR(bytes_per_datum, S_IRUGO | S_IWUSR, \
266 iio_read_ring_bytes_per_datum, NULL)
267#define IIO_RING_ENABLE_ATTR DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, \
268 iio_show_ring_enable, \
269 iio_store_ring_enable)
270
271int iio_sw_ring_preenable(struct iio_dev *indio_dev);
272
273#else /* CONFIG_IIO_RING_BUFFER */
274
275static inline int iio_ring_buffer_register_ex(struct iio_ring_buffer *ring,
276 int id,
277 struct iio_chan_spec *channels,
278 int num_channels)
279{
280 return 0;
281}
282
283static inline void iio_ring_buffer_unregister(struct iio_ring_buffer *ring)
284{};
285
286#endif /* CONFIG_IIO_RING_BUFFER */
287
288#endif /* _IIO_RING_GENERIC_H_ */
diff --git a/drivers/staging/iio/sysfs.h b/drivers/staging/iio/sysfs.h
new file mode 100644
index 00000000000..dd79b584421
--- /dev/null
+++ b/drivers/staging/iio/sysfs.h
@@ -0,0 +1,222 @@
1/* The industrial I/O core
2 *
3 *Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * General attributes
10 */
11
12#ifndef _INDUSTRIAL_IO_SYSFS_H_
13#define _INDUSTRIAL_IO_SYSFS_H_
14
15#include "iio.h"
16
17/**
18 * struct iio_dev_attr - iio specific device attribute
19 * @dev_attr: underlying device attribute
20 * @address: associated register address
21 * @val2: secondary attribute value
22 * @l: list head for maintaining list of dynamically created attrs.
23 */
24struct iio_dev_attr {
25 struct device_attribute dev_attr;
26 int address;
27 int val2;
28 struct list_head l;
29 struct iio_chan_spec const *c;
30};
31
32#define to_iio_dev_attr(_dev_attr) \
33 container_of(_dev_attr, struct iio_dev_attr, dev_attr)
34
35ssize_t iio_read_const_attr(struct device *dev,
36 struct device_attribute *attr,
37 char *len);
38
39/**
40 * struct iio_const_attr - constant device specific attribute
41 * often used for things like available modes
42 * @string: attribute string
43 * @dev_attr: underlying device attribute
44 */
45struct iio_const_attr {
46 const char *string;
47 struct device_attribute dev_attr;
48};
49
50#define to_iio_const_attr(_dev_attr) \
51 container_of(_dev_attr, struct iio_const_attr, dev_attr)
52
53/* Some attributes will be hard coded (device dependent) and not require an
54 address, in these cases pass a negative */
55#define IIO_ATTR(_name, _mode, _show, _store, _addr) \
56 { .dev_attr = __ATTR(_name, _mode, _show, _store), \
57 .address = _addr }
58
59#define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
60 struct iio_dev_attr iio_dev_attr_##_name \
61 = IIO_ATTR(_name, _mode, _show, _store, _addr)
62
63#define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
64 struct iio_dev_attr iio_dev_attr_##_vname \
65 = IIO_ATTR(_name, _mode, _show, _store, _addr)
66
67#define IIO_DEVICE_ATTR_2(_name, _mode, _show, _store, _addr, _val2) \
68 struct iio_dev_attr iio_dev_attr_##_name \
69 = IIO_ATTR_2(_name, _mode, _show, _store, _addr, _val2)
70
71#define IIO_CONST_ATTR(_name, _string) \
72 struct iio_const_attr iio_const_attr_##_name \
73 = { .string = _string, \
74 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
75
76#define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
77 struct iio_const_attr iio_const_attr_##_vname \
78 = { .string = _string, \
79 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
80/* Generic attributes of onetype or another */
81
82/**
83 * IIO_DEV_ATTR_REV - revision number for the device
84 * @_show: output method for the attribute
85 *
86 * Very much device dependent.
87 **/
88#define IIO_DEV_ATTR_REV(_show) \
89 IIO_DEVICE_ATTR(revision, S_IRUGO, _show, NULL, 0)
90
91/**
92 * IIO_DEV_ATTR_RESET: resets the device
93 **/
94#define IIO_DEV_ATTR_RESET(_store) \
95 IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, _store, 0)
96
97/**
98 * IIO_CONST_ATTR_NAME - constant identifier
99 * @_string: the name
100 **/
101#define IIO_CONST_ATTR_NAME(_string) \
102 IIO_CONST_ATTR(name, _string)
103
104/**
105 * IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
106 * @_mode: sysfs file mode/permissions
107 * @_show: output method for the attribute
108 * @_store: input method for the attribute
109 **/
110#define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
111 IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0)
112
113/**
114 * IIO_DEV_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies
115 * @_show: output method for the attribute
116 *
117 * May be mode dependent on some devices
118 **/
119/* Deprecated */
120#define IIO_DEV_ATTR_AVAIL_SAMP_FREQ(_show) \
121 IIO_DEVICE_ATTR(available_sampling_frequency, S_IRUGO, _show, NULL, 0)
122
123#define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
124 IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0)
125/**
126 * IIO_CONST_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies
127 * @_string: frequency string for the attribute
128 *
129 * Constant version
130 **/
131#define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
132 IIO_CONST_ATTR(sampling_frequency_available, _string)
133
134/**
135 * IIO_DEV_ATTR_SW_RING_ENABLE - enable software ring buffer
136 * @_show: output method for the attribute
137 * @_store: input method for the attribute
138 *
139 * Success may be dependent on attachment of trigger previously.
140 **/
141#define IIO_DEV_ATTR_SW_RING_ENABLE(_show, _store) \
142 IIO_DEVICE_ATTR(sw_ring_enable, S_IRUGO | S_IWUSR, _show, _store, 0)
143
144/**
145 * IIO_DEV_ATTR_HW_RING_ENABLE - enable hardware ring buffer
146 * @_show: output method for the attribute
147 * @_store: input method for the attribute
148 *
149 * This is a different attribute from the software one as one can envision
150 * schemes where a combination of the two may be used.
151 **/
152#define IIO_DEV_ATTR_HW_RING_ENABLE(_show, _store) \
153 IIO_DEVICE_ATTR(hw_ring_enable, S_IRUGO | S_IWUSR, _show, _store, 0)
154
155#define IIO_DEV_ATTR_TEMP_RAW(_show) \
156 IIO_DEVICE_ATTR(temp_raw, S_IRUGO, _show, NULL, 0)
157
158#define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
159 IIO_CONST_ATTR(temp_offset, _string)
160
161#define IIO_CONST_ATTR_TEMP_SCALE(_string) \
162 IIO_CONST_ATTR(temp_scale, _string)
163
164/* must match our channel defs */
165#define IIO_EV_CLASS_IN IIO_IN
166#define IIO_EV_CLASS_IN_DIFF IIO_IN_DIFF
167#define IIO_EV_CLASS_ACCEL IIO_ACCEL
168#define IIO_EV_CLASS_GYRO IIO_GYRO
169#define IIO_EV_CLASS_MAGN IIO_MAGN
170#define IIO_EV_CLASS_LIGHT IIO_LIGHT
171#define IIO_EV_CLASS_PROXIMITY IIO_PROXIMITY
172#define IIO_EV_CLASS_TEMP IIO_TEMP
173
174#define IIO_EV_MOD_X IIO_MOD_X
175#define IIO_EV_MOD_Y IIO_MOD_Y
176#define IIO_EV_MOD_Z IIO_MOD_Z
177#define IIO_EV_MOD_X_AND_Y IIO_MOD_X_AND_Y
178#define IIO_EV_MOD_X_ANX_Z IIO_MOD_X_AND_Z
179#define IIO_EV_MOD_Y_AND_Z IIO_MOD_Y_AND_Z
180#define IIO_EV_MOD_X_AND_Y_AND_Z IIO_MOD_X_AND_Y_AND_Z
181#define IIO_EV_MOD_X_OR_Y IIO_MOD_X_OR_Y
182#define IIO_EV_MOD_X_OR_Z IIO_MOD_X_OR_Z
183#define IIO_EV_MOD_Y_OR_Z IIO_MOD_Y_OR_Z
184#define IIO_EV_MOD_X_OR_Y_OR_Z IIO_MOD_X_OR_Y_OR_Z
185
186#define IIO_EV_TYPE_THRESH 0
187#define IIO_EV_TYPE_MAG 1
188#define IIO_EV_TYPE_ROC 2
189
190#define IIO_EV_DIR_EITHER 0
191#define IIO_EV_DIR_RISING 1
192#define IIO_EV_DIR_FALLING 2
193
194#define IIO_EV_TYPE_MAX 8
195#define IIO_EV_BIT(type, direction) \
196 (1 << (type*IIO_EV_TYPE_MAX + direction))
197
198#define IIO_EVENT_CODE(channelclass, orient_bit, number, \
199 modifier, type, direction) \
200 (channelclass | (orient_bit << 8) | ((number) << 9) | \
201 ((modifier) << 13) | ((type) << 16) | ((direction) << 24))
202
203#define IIO_MOD_EVENT_CODE(channelclass, number, modifier, \
204 type, direction) \
205 IIO_EVENT_CODE(channelclass, 1, number, modifier, type, direction)
206
207#define IIO_UNMOD_EVENT_CODE(channelclass, number, type, direction) \
208 IIO_EVENT_CODE(channelclass, 0, number, 0, type, direction)
209
210
211#define IIO_BUFFER_EVENT_CODE(code) \
212 (IIO_EV_CLASS_BUFFER | (code << 8))
213
214#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 24) & 0xf)
215
216/* Event code number extraction depends on which type of event we have.
217 * Perhaps review this function in the future*/
218#define IIO_EVENT_CODE_EXTRACT_NUM(mask) ((mask >> 9) & 0x0f)
219
220#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 13) & 0x7)
221
222#endif /* _INDUSTRIAL_IO_SYSFS_H_ */
diff --git a/drivers/staging/iio/trigger.h b/drivers/staging/iio/trigger.h
new file mode 100644
index 00000000000..e0b58ed749b
--- /dev/null
+++ b/drivers/staging/iio/trigger.h
@@ -0,0 +1,188 @@
1/* The industrial I/O core, trigger handling functions
2 *
3 * Copyright (c) 2008 Jonathan Cameron
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 */
9#include <linux/irq.h>
10
11#ifndef _IIO_TRIGGER_H_
12#define _IIO_TRIGGER_H_
13
14struct iio_subirq {
15 bool enabled;
16};
17
18/**
19 * struct iio_trigger - industrial I/O trigger device
20 *
21 * @id: [INTERN] unique id number
22 * @name: [DRIVER] unique name
23 * @dev: [DRIVER] associated device (if relevant)
24 * @private_data: [DRIVER] device specific data
25 * @list: [INTERN] used in maintenance of global trigger list
26 * @alloc_list: [DRIVER] used for driver specific trigger list
27 * @owner: [DRIVER] used to monitor usage count of the trigger.
28 * @use_count: use count for the trigger
29 * @set_trigger_state: [DRIVER] switch on/off the trigger on demand
30 * @try_reenable: function to reenable the trigger when the
31 * use count is zero (may be NULL)
32 * @validate_device: function to validate the device when the
33 * current trigger gets changed.
34 * @subirq_chip: [INTERN] associate 'virtual' irq chip.
35 * @subirq_base: [INTERN] base number for irqs provided by trigger.
36 * @subirqs: [INTERN] information about the 'child' irqs.
37 * @pool: [INTERN] bitmap of irqs currently in use.
38 * @pool_lock: [INTERN] protection of the irq pool.
39 **/
40struct iio_trigger {
41 int id;
42 const char *name;
43 struct device dev;
44
45 void *private_data;
46 struct list_head list;
47 struct list_head alloc_list;
48 struct module *owner;
49 int use_count;
50
51 int (*set_trigger_state)(struct iio_trigger *trig, bool state);
52 int (*try_reenable)(struct iio_trigger *trig);
53 int (*validate_device)(struct iio_trigger *trig,
54 struct iio_dev *indio_dev);
55
56 struct irq_chip subirq_chip;
57 int subirq_base;
58
59 struct iio_subirq subirqs[CONFIG_IIO_CONSUMERS_PER_TRIGGER];
60 unsigned long pool[BITS_TO_LONGS(CONFIG_IIO_CONSUMERS_PER_TRIGGER)];
61 struct mutex pool_lock;
62};
63
64/**
65 * struct iio_poll_func - poll function pair
66 *
67 * @private_data: data specific to device (passed into poll func)
68 * @h: the function that is actually run on trigger
69 * @thread: threaded interrupt part
70 * @type: the type of interrupt (basically if oneshot)
71 * @name: name used to identify the trigger consumer.
72 * @irq: the corresponding irq as allocated from the
73 * trigger pool
74 * @timestamp: some devices need a timestamp grabbed as soon
75 * as possible after the trigger - hence handler
76 * passes it via here.
77 **/
78struct iio_poll_func {
79 void *private_data;
80 irqreturn_t (*h)(int irq, void *p);
81 irqreturn_t (*thread)(int irq, void *p);
82 int type;
83 char *name;
84 int irq;
85 s64 timestamp;
86};
87
88static inline struct iio_trigger *to_iio_trigger(struct device *d)
89{
90 return container_of(d, struct iio_trigger, dev);
91};
92
93static inline void iio_put_trigger(struct iio_trigger *trig)
94{
95 put_device(&trig->dev);
96 module_put(trig->owner);
97};
98
99static inline void iio_get_trigger(struct iio_trigger *trig)
100{
101 __module_get(trig->owner);
102 get_device(&trig->dev);
103};
104
105/**
106 * iio_trigger_register() - register a trigger with the IIO core
107 * @trig_info: trigger to be registered
108 **/
109int iio_trigger_register(struct iio_trigger *trig_info);
110
111/**
112 * iio_trigger_unregister() - unregister a trigger from the core
113 * @trig_info: trigger to be unregistered
114 **/
115void iio_trigger_unregister(struct iio_trigger *trig_info);
116
117/**
118 * iio_trigger_attach_poll_func() - add a function pair to be run on trigger
119 * @trig: trigger to which the function pair are being added
120 * @pf: poll function pair
121 **/
122int iio_trigger_attach_poll_func(struct iio_trigger *trig,
123 struct iio_poll_func *pf);
124
125/**
126 * iio_trigger_dettach_poll_func() - remove function pair from those to be
127 * run on trigger
128 * @trig: trigger from which the function is being removed
129 * @pf: poll function pair
130 **/
131int iio_trigger_dettach_poll_func(struct iio_trigger *trig,
132 struct iio_poll_func *pf);
133
134/**
135 * iio_trigger_poll() - called on a trigger occurring
136 * @trig: trigger which occurred
137 *
138 * Typically called in relevant hardware interrupt handler.
139 **/
140void iio_trigger_poll(struct iio_trigger *trig, s64 time);
141void iio_trigger_poll_chained(struct iio_trigger *trig, s64 time);
142void iio_trigger_notify_done(struct iio_trigger *trig);
143
144irqreturn_t iio_trigger_generic_data_rdy_poll(int irq, void *private);
145
146static inline int iio_trigger_get_irq(struct iio_trigger *trig)
147{
148 int ret;
149 mutex_lock(&trig->pool_lock);
150 ret = bitmap_find_free_region(trig->pool,
151 CONFIG_IIO_CONSUMERS_PER_TRIGGER,
152 ilog2(1));
153 mutex_unlock(&trig->pool_lock);
154 if (ret >= 0)
155 ret += trig->subirq_base;
156
157 return ret;
158};
159
160static inline void iio_trigger_put_irq(struct iio_trigger *trig, int irq)
161{
162 mutex_lock(&trig->pool_lock);
163 clear_bit(irq - trig->subirq_base, trig->pool);
164 mutex_unlock(&trig->pool_lock);
165};
166
167struct iio_poll_func
168*iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
169 irqreturn_t (*thread)(int irq, void *p),
170 int type,
171 void *private,
172 const char *fmt,
173 ...);
174void iio_dealloc_pollfunc(struct iio_poll_func *pf);
175irqreturn_t iio_pollfunc_store_time(int irq, void *p);
176
177/*
178 * Two functions for common case where all that happens is a pollfunc
179 * is attached and detached from a trigger
180 */
181int iio_triggered_ring_postenable(struct iio_dev *indio_dev);
182int iio_triggered_ring_predisable(struct iio_dev *indio_dev);
183
184struct iio_trigger *iio_allocate_trigger(const char *fmt, ...)
185 __attribute__((format(printf, 1, 2)));
186void iio_free_trigger(struct iio_trigger *trig);
187
188#endif /* _IIO_TRIGGER_H_ */
diff --git a/drivers/staging/iio/trigger_consumer.h b/drivers/staging/iio/trigger_consumer.h
new file mode 100644
index 00000000000..9d52d963777
--- /dev/null
+++ b/drivers/staging/iio/trigger_consumer.h
@@ -0,0 +1,47 @@
1
2/* The industrial I/O core, trigger consumer handling functions
3 *
4 * Copyright (c) 2008 Jonathan Cameron
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
9 */
10
11#ifdef CONFIG_IIO_TRIGGER
12/**
13 * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
14 * @dev_info: iio_dev associated with the device that will consume the trigger
15 **/
16int iio_device_register_trigger_consumer(struct iio_dev *dev_info);
17
18/**
19 * iio_device_unregister_trigger_consumer() - reverse the registration process
20 * @dev_info: iio_dev associated with the device that consumed the trigger
21 **/
22int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info);
23
24#else
25
26/**
27 * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
28 * @dev_info: iio_dev associated with the device that will consume the trigger
29 **/
30static int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
31{
32 return 0;
33};
34
35/**
36 * iio_device_unregister_trigger_consumer() - reverse the registration process
37 * @dev_info: iio_dev associated with the device that consumed the trigger
38 **/
39static int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info)
40{
41 return 0;
42};
43
44#endif /* CONFIG_TRIGGER_CONSUMER */
45
46
47
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-15 03:24:38 -0500