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authorJean Delvare <khali@linux-fr.org>2011-03-21 12:59:36 -0400
committerJean Delvare <khali@endymion.delvare>2011-03-21 12:59:36 -0400
commitff606677f6a47c63329cf8e6c7cf978c29f2d736 (patch)
tree565bcdaa1f5058af0a6fd2260b3c45029c955d08 /drivers/misc
parentefcfed9bad88be8193ee6a1b8e72d7381e7b0e0e (diff)
Move lis3lv02d drivers to drivers/misc
The lis3lv02d drivers aren't hardware monitoring drivers, so the don't belong to drivers/hwmon. Move them to drivers/misc, short of a better home. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Eric Piel <eric.piel@tremplin-utc.net> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Tested-by: Eric Piel <eric.piel@tremplin-utc.net> Tested-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/Kconfig9
-rw-r--r--drivers/misc/Makefile1
-rw-r--r--drivers/misc/lis3lv02d/Kconfig37
-rw-r--r--drivers/misc/lis3lv02d/Makefile7
-rw-r--r--drivers/misc/lis3lv02d/lis3lv02d.c999
-rw-r--r--drivers/misc/lis3lv02d/lis3lv02d.h291
-rw-r--r--drivers/misc/lis3lv02d/lis3lv02d_i2c.c279
-rw-r--r--drivers/misc/lis3lv02d/lis3lv02d_spi.c145
8 files changed, 1768 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index b7d5ef234ac..203500d9b84 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -2,6 +2,14 @@
2# Misc strange devices 2# Misc strange devices
3# 3#
4 4
5# This one has to live outside of the MISC_DEVICES conditional,
6# because it may be selected by drivers/platform/x86/hp_accel.
7config SENSORS_LIS3LV02D
8 tristate
9 depends on INPUT
10 select INPUT_POLLDEV
11 default n
12
5menuconfig MISC_DEVICES 13menuconfig MISC_DEVICES
6 bool "Misc devices" 14 bool "Misc devices"
7 ---help--- 15 ---help---
@@ -462,5 +470,6 @@ source "drivers/misc/eeprom/Kconfig"
462source "drivers/misc/cb710/Kconfig" 470source "drivers/misc/cb710/Kconfig"
463source "drivers/misc/iwmc3200top/Kconfig" 471source "drivers/misc/iwmc3200top/Kconfig"
464source "drivers/misc/ti-st/Kconfig" 472source "drivers/misc/ti-st/Kconfig"
473source "drivers/misc/lis3lv02d/Kconfig"
465 474
466endif # MISC_DEVICES 475endif # MISC_DEVICES
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 98009cc20cb..804f421bc07 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -42,3 +42,4 @@ obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o
42obj-$(CONFIG_PCH_PHUB) += pch_phub.o 42obj-$(CONFIG_PCH_PHUB) += pch_phub.o
43obj-y += ti-st/ 43obj-y += ti-st/
44obj-$(CONFIG_AB8500_PWM) += ab8500-pwm.o 44obj-$(CONFIG_AB8500_PWM) += ab8500-pwm.o
45obj-y += lis3lv02d/
diff --git a/drivers/misc/lis3lv02d/Kconfig b/drivers/misc/lis3lv02d/Kconfig
new file mode 100644
index 00000000000..8f474e6fc7b
--- /dev/null
+++ b/drivers/misc/lis3lv02d/Kconfig
@@ -0,0 +1,37 @@
1#
2# STMicroelectonics LIS3LV02D and similar accelerometers
3#
4
5config SENSORS_LIS3_SPI
6 tristate "STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (SPI)"
7 depends on !ACPI && SPI_MASTER && INPUT
8 select SENSORS_LIS3LV02D
9 default n
10 help
11 This driver provides support for the LIS3LV02Dx accelerometer connected
12 via SPI. The accelerometer data is readable via
13 /sys/devices/platform/lis3lv02d.
14
15 This driver also provides an absolute input class device, allowing
16 the laptop to act as a pinball machine-esque joystick.
17
18 This driver can also be built as modules. If so, the core module
19 will be called lis3lv02d and a specific module for the SPI transport
20 is called lis3lv02d_spi.
21
22config SENSORS_LIS3_I2C
23 tristate "STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (I2C)"
24 depends on I2C && INPUT
25 select SENSORS_LIS3LV02D
26 default n
27 help
28 This driver provides support for the LIS3LV02Dx accelerometer connected
29 via I2C. The accelerometer data is readable via
30 /sys/devices/platform/lis3lv02d.
31
32 This driver also provides an absolute input class device, allowing
33 the device to act as a pinball machine-esque joystick.
34
35 This driver can also be built as modules. If so, the core module
36 will be called lis3lv02d and a specific module for the I2C transport
37 is called lis3lv02d_i2c.
diff --git a/drivers/misc/lis3lv02d/Makefile b/drivers/misc/lis3lv02d/Makefile
new file mode 100644
index 00000000000..4bf58b16fcf
--- /dev/null
+++ b/drivers/misc/lis3lv02d/Makefile
@@ -0,0 +1,7 @@
1#
2# STMicroelectonics LIS3LV02D and similar accelerometers
3#
4
5obj-$(CONFIG_SENSORS_LIS3LV02D) += lis3lv02d.o
6obj-$(CONFIG_SENSORS_LIS3_SPI) += lis3lv02d_spi.o
7obj-$(CONFIG_SENSORS_LIS3_I2C) += lis3lv02d_i2c.o
diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c
new file mode 100644
index 00000000000..b928bc14e97
--- /dev/null
+++ b/drivers/misc/lis3lv02d/lis3lv02d.c
@@ -0,0 +1,999 @@
1/*
2 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
3 *
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/kernel.h>
26#include <linux/init.h>
27#include <linux/dmi.h>
28#include <linux/module.h>
29#include <linux/types.h>
30#include <linux/platform_device.h>
31#include <linux/interrupt.h>
32#include <linux/input-polldev.h>
33#include <linux/delay.h>
34#include <linux/wait.h>
35#include <linux/poll.h>
36#include <linux/slab.h>
37#include <linux/freezer.h>
38#include <linux/uaccess.h>
39#include <linux/miscdevice.h>
40#include <linux/pm_runtime.h>
41#include <linux/atomic.h>
42#include "lis3lv02d.h"
43
44#define DRIVER_NAME "lis3lv02d"
45
46/* joystick device poll interval in milliseconds */
47#define MDPS_POLL_INTERVAL 50
48#define MDPS_POLL_MIN 0
49#define MDPS_POLL_MAX 2000
50
51#define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
52
53#define SELFTEST_OK 0
54#define SELFTEST_FAIL -1
55#define SELFTEST_IRQ -2
56
57#define IRQ_LINE0 0
58#define IRQ_LINE1 1
59
60/*
61 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
62 * because they are generated even if the data do not change. So it's better
63 * to keep the interrupt for the free-fall event. The values are updated at
64 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
65 * some low processor, we poll the sensor only at 20Hz... enough for the
66 * joystick.
67 */
68
69#define LIS3_PWRON_DELAY_WAI_12B (5000)
70#define LIS3_PWRON_DELAY_WAI_8B (3000)
71
72/*
73 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
74 * LIS302D spec says: 18 mG / digit
75 * LIS3_ACCURACY is used to increase accuracy of the intermediate
76 * calculation results.
77 */
78#define LIS3_ACCURACY 1024
79/* Sensitivity values for -2G +2G scale */
80#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
81#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
82
83#define LIS3_DEFAULT_FUZZ_12B 3
84#define LIS3_DEFAULT_FLAT_12B 3
85#define LIS3_DEFAULT_FUZZ_8B 1
86#define LIS3_DEFAULT_FLAT_8B 1
87
88struct lis3lv02d lis3_dev = {
89 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
90};
91EXPORT_SYMBOL_GPL(lis3_dev);
92
93/* just like param_set_int() but does sanity-check so that it won't point
94 * over the axis array size
95 */
96static int param_set_axis(const char *val, const struct kernel_param *kp)
97{
98 int ret = param_set_int(val, kp);
99 if (!ret) {
100 int val = *(int *)kp->arg;
101 if (val < 0)
102 val = -val;
103 if (!val || val > 3)
104 return -EINVAL;
105 }
106 return ret;
107}
108
109static struct kernel_param_ops param_ops_axis = {
110 .set = param_set_axis,
111 .get = param_get_int,
112};
113
114module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
115MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
116
117static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
118{
119 s8 lo;
120 if (lis3->read(lis3, reg, &lo) < 0)
121 return 0;
122
123 return lo;
124}
125
126static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
127{
128 u8 lo, hi;
129
130 lis3->read(lis3, reg - 1, &lo);
131 lis3->read(lis3, reg, &hi);
132 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
133 return (s16)((hi << 8) | lo);
134}
135
136/**
137 * lis3lv02d_get_axis - For the given axis, give the value converted
138 * @axis: 1,2,3 - can also be negative
139 * @hw_values: raw values returned by the hardware
140 *
141 * Returns the converted value.
142 */
143static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
144{
145 if (axis > 0)
146 return hw_values[axis - 1];
147 else
148 return -hw_values[-axis - 1];
149}
150
151/**
152 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
153 * @lis3: pointer to the device struct
154 * @x: where to store the X axis value
155 * @y: where to store the Y axis value
156 * @z: where to store the Z axis value
157 *
158 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
159 */
160static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
161{
162 int position[3];
163 int i;
164
165 if (lis3->blkread) {
166 if (lis3_dev.whoami == WAI_12B) {
167 u16 data[3];
168 lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
169 for (i = 0; i < 3; i++)
170 position[i] = (s16)le16_to_cpu(data[i]);
171 } else {
172 u8 data[5];
173 /* Data: x, dummy, y, dummy, z */
174 lis3->blkread(lis3, OUTX, 5, data);
175 for (i = 0; i < 3; i++)
176 position[i] = (s8)data[i * 2];
177 }
178 } else {
179 position[0] = lis3->read_data(lis3, OUTX);
180 position[1] = lis3->read_data(lis3, OUTY);
181 position[2] = lis3->read_data(lis3, OUTZ);
182 }
183
184 for (i = 0; i < 3; i++)
185 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
186
187 *x = lis3lv02d_get_axis(lis3->ac.x, position);
188 *y = lis3lv02d_get_axis(lis3->ac.y, position);
189 *z = lis3lv02d_get_axis(lis3->ac.z, position);
190}
191
192/* conversion btw sampling rate and the register values */
193static int lis3_12_rates[4] = {40, 160, 640, 2560};
194static int lis3_8_rates[2] = {100, 400};
195static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
196
197/* ODR is Output Data Rate */
198static int lis3lv02d_get_odr(void)
199{
200 u8 ctrl;
201 int shift;
202
203 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
204 ctrl &= lis3_dev.odr_mask;
205 shift = ffs(lis3_dev.odr_mask) - 1;
206 return lis3_dev.odrs[(ctrl >> shift)];
207}
208
209static int lis3lv02d_set_odr(int rate)
210{
211 u8 ctrl;
212 int i, len, shift;
213
214 if (!rate)
215 return -EINVAL;
216
217 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
218 ctrl &= ~lis3_dev.odr_mask;
219 len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
220 shift = ffs(lis3_dev.odr_mask) - 1;
221
222 for (i = 0; i < len; i++)
223 if (lis3_dev.odrs[i] == rate) {
224 lis3_dev.write(&lis3_dev, CTRL_REG1,
225 ctrl | (i << shift));
226 return 0;
227 }
228 return -EINVAL;
229}
230
231static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
232{
233 u8 ctlreg, reg;
234 s16 x, y, z;
235 u8 selftest;
236 int ret;
237 u8 ctrl_reg_data;
238 unsigned char irq_cfg;
239
240 mutex_lock(&lis3->mutex);
241
242 irq_cfg = lis3->irq_cfg;
243 if (lis3_dev.whoami == WAI_8B) {
244 lis3->data_ready_count[IRQ_LINE0] = 0;
245 lis3->data_ready_count[IRQ_LINE1] = 0;
246
247 /* Change interrupt cfg to data ready for selftest */
248 atomic_inc(&lis3_dev.wake_thread);
249 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
250 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
251 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
252 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
253 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
254 }
255
256 if (lis3_dev.whoami == WAI_3DC) {
257 ctlreg = CTRL_REG4;
258 selftest = CTRL4_ST0;
259 } else {
260 ctlreg = CTRL_REG1;
261 if (lis3_dev.whoami == WAI_12B)
262 selftest = CTRL1_ST;
263 else
264 selftest = CTRL1_STP;
265 }
266
267 lis3->read(lis3, ctlreg, &reg);
268 lis3->write(lis3, ctlreg, (reg | selftest));
269 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
270
271 /* Read directly to avoid axis remap */
272 x = lis3->read_data(lis3, OUTX);
273 y = lis3->read_data(lis3, OUTY);
274 z = lis3->read_data(lis3, OUTZ);
275
276 /* back to normal settings */
277 lis3->write(lis3, ctlreg, reg);
278 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
279
280 results[0] = x - lis3->read_data(lis3, OUTX);
281 results[1] = y - lis3->read_data(lis3, OUTY);
282 results[2] = z - lis3->read_data(lis3, OUTZ);
283
284 ret = 0;
285
286 if (lis3_dev.whoami == WAI_8B) {
287 /* Restore original interrupt configuration */
288 atomic_dec(&lis3_dev.wake_thread);
289 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
290 lis3->irq_cfg = irq_cfg;
291
292 if ((irq_cfg & LIS3_IRQ1_MASK) &&
293 lis3->data_ready_count[IRQ_LINE0] < 2) {
294 ret = SELFTEST_IRQ;
295 goto fail;
296 }
297
298 if ((irq_cfg & LIS3_IRQ2_MASK) &&
299 lis3->data_ready_count[IRQ_LINE1] < 2) {
300 ret = SELFTEST_IRQ;
301 goto fail;
302 }
303 }
304
305 if (lis3->pdata) {
306 int i;
307 for (i = 0; i < 3; i++) {
308 /* Check against selftest acceptance limits */
309 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
310 (results[i] > lis3->pdata->st_max_limits[i])) {
311 ret = SELFTEST_FAIL;
312 goto fail;
313 }
314 }
315 }
316
317 /* test passed */
318fail:
319 mutex_unlock(&lis3->mutex);
320 return ret;
321}
322
323/*
324 * Order of registers in the list affects to order of the restore process.
325 * Perhaps it is a good idea to set interrupt enable register as a last one
326 * after all other configurations
327 */
328static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
329 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
330 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
331 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
332 CTRL_REG1, CTRL_REG2, CTRL_REG3};
333
334static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
335 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
336 DD_THSE_L, DD_THSE_H,
337 CTRL_REG1, CTRL_REG3, CTRL_REG2};
338
339static inline void lis3_context_save(struct lis3lv02d *lis3)
340{
341 int i;
342 for (i = 0; i < lis3->regs_size; i++)
343 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
344 lis3->regs_stored = true;
345}
346
347static inline void lis3_context_restore(struct lis3lv02d *lis3)
348{
349 int i;
350 if (lis3->regs_stored)
351 for (i = 0; i < lis3->regs_size; i++)
352 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
353}
354
355void lis3lv02d_poweroff(struct lis3lv02d *lis3)
356{
357 if (lis3->reg_ctrl)
358 lis3_context_save(lis3);
359 /* disable X,Y,Z axis and power down */
360 lis3->write(lis3, CTRL_REG1, 0x00);
361 if (lis3->reg_ctrl)
362 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
363}
364EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
365
366void lis3lv02d_poweron(struct lis3lv02d *lis3)
367{
368 u8 reg;
369
370 lis3->init(lis3);
371
372 /*
373 * Common configuration
374 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
375 * both have been read. So the value read will always be correct.
376 * Set BOOT bit to refresh factory tuning values.
377 */
378 lis3->read(lis3, CTRL_REG2, &reg);
379 if (lis3->whoami == WAI_12B)
380 reg |= CTRL2_BDU | CTRL2_BOOT;
381 else
382 reg |= CTRL2_BOOT_8B;
383 lis3->write(lis3, CTRL_REG2, reg);
384
385 /* LIS3 power on delay is quite long */
386 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
387
388 if (lis3->reg_ctrl)
389 lis3_context_restore(lis3);
390}
391EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
392
393
394static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
395{
396 int x, y, z;
397
398 mutex_lock(&lis3_dev.mutex);
399 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
400 input_report_abs(pidev->input, ABS_X, x);
401 input_report_abs(pidev->input, ABS_Y, y);
402 input_report_abs(pidev->input, ABS_Z, z);
403 input_sync(pidev->input);
404 mutex_unlock(&lis3_dev.mutex);
405}
406
407static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
408{
409 if (lis3_dev.pm_dev)
410 pm_runtime_get_sync(lis3_dev.pm_dev);
411
412 if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev)
413 atomic_set(&lis3_dev.wake_thread, 1);
414 /*
415 * Update coordinates for the case where poll interval is 0 and
416 * the chip in running purely under interrupt control
417 */
418 lis3lv02d_joystick_poll(pidev);
419}
420
421static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
422{
423 atomic_set(&lis3_dev.wake_thread, 0);
424 if (lis3_dev.pm_dev)
425 pm_runtime_put(lis3_dev.pm_dev);
426}
427
428static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
429{
430 if (!test_bit(0, &lis3_dev.misc_opened))
431 goto out;
432
433 /*
434 * Be careful: on some HP laptops the bios force DD when on battery and
435 * the lid is closed. This leads to interrupts as soon as a little move
436 * is done.
437 */
438 atomic_inc(&lis3_dev.count);
439
440 wake_up_interruptible(&lis3_dev.misc_wait);
441 kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
442out:
443 if (atomic_read(&lis3_dev.wake_thread))
444 return IRQ_WAKE_THREAD;
445 return IRQ_HANDLED;
446}
447
448static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
449{
450 struct input_dev *dev = lis3->idev->input;
451 u8 click_src;
452
453 mutex_lock(&lis3->mutex);
454 lis3->read(lis3, CLICK_SRC, &click_src);
455
456 if (click_src & CLICK_SINGLE_X) {
457 input_report_key(dev, lis3->mapped_btns[0], 1);
458 input_report_key(dev, lis3->mapped_btns[0], 0);
459 }
460
461 if (click_src & CLICK_SINGLE_Y) {
462 input_report_key(dev, lis3->mapped_btns[1], 1);
463 input_report_key(dev, lis3->mapped_btns[1], 0);
464 }
465
466 if (click_src & CLICK_SINGLE_Z) {
467 input_report_key(dev, lis3->mapped_btns[2], 1);
468 input_report_key(dev, lis3->mapped_btns[2], 0);
469 }
470 input_sync(dev);
471 mutex_unlock(&lis3->mutex);
472}
473
474static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
475{
476 int dummy;
477
478 /* Dummy read to ack interrupt */
479 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
480 lis3->data_ready_count[index]++;
481}
482
483static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
484{
485 struct lis3lv02d *lis3 = data;
486 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
487
488 if (irq_cfg == LIS3_IRQ1_CLICK)
489 lis302dl_interrupt_handle_click(lis3);
490 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
491 lis302dl_data_ready(lis3, IRQ_LINE0);
492 else
493 lis3lv02d_joystick_poll(lis3->idev);
494
495 return IRQ_HANDLED;
496}
497
498static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
499{
500 struct lis3lv02d *lis3 = data;
501 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
502
503 if (irq_cfg == LIS3_IRQ2_CLICK)
504 lis302dl_interrupt_handle_click(lis3);
505 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
506 lis302dl_data_ready(lis3, IRQ_LINE1);
507 else
508 lis3lv02d_joystick_poll(lis3->idev);
509
510 return IRQ_HANDLED;
511}
512
513static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
514{
515 if (test_and_set_bit(0, &lis3_dev.misc_opened))
516 return -EBUSY; /* already open */
517
518 if (lis3_dev.pm_dev)
519 pm_runtime_get_sync(lis3_dev.pm_dev);
520
521 atomic_set(&lis3_dev.count, 0);
522 return 0;
523}
524
525static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
526{
527 fasync_helper(-1, file, 0, &lis3_dev.async_queue);
528 clear_bit(0, &lis3_dev.misc_opened); /* release the device */
529 if (lis3_dev.pm_dev)
530 pm_runtime_put(lis3_dev.pm_dev);
531 return 0;
532}
533
534static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
535 size_t count, loff_t *pos)
536{
537 DECLARE_WAITQUEUE(wait, current);
538 u32 data;
539 unsigned char byte_data;
540 ssize_t retval = 1;
541
542 if (count < 1)
543 return -EINVAL;
544
545 add_wait_queue(&lis3_dev.misc_wait, &wait);
546 while (true) {
547 set_current_state(TASK_INTERRUPTIBLE);
548 data = atomic_xchg(&lis3_dev.count, 0);
549 if (data)
550 break;
551
552 if (file->f_flags & O_NONBLOCK) {
553 retval = -EAGAIN;
554 goto out;
555 }
556
557 if (signal_pending(current)) {
558 retval = -ERESTARTSYS;
559 goto out;
560 }
561
562 schedule();
563 }
564
565 if (data < 255)
566 byte_data = data;
567 else
568 byte_data = 255;
569
570 /* make sure we are not going into copy_to_user() with
571 * TASK_INTERRUPTIBLE state */
572 set_current_state(TASK_RUNNING);
573 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
574 retval = -EFAULT;
575
576out:
577 __set_current_state(TASK_RUNNING);
578 remove_wait_queue(&lis3_dev.misc_wait, &wait);
579
580 return retval;
581}
582
583static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
584{
585 poll_wait(file, &lis3_dev.misc_wait, wait);
586 if (atomic_read(&lis3_dev.count))
587 return POLLIN | POLLRDNORM;
588 return 0;
589}
590
591static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
592{
593 return fasync_helper(fd, file, on, &lis3_dev.async_queue);
594}
595
596static const struct file_operations lis3lv02d_misc_fops = {
597 .owner = THIS_MODULE,
598 .llseek = no_llseek,
599 .read = lis3lv02d_misc_read,
600 .open = lis3lv02d_misc_open,
601 .release = lis3lv02d_misc_release,
602 .poll = lis3lv02d_misc_poll,
603 .fasync = lis3lv02d_misc_fasync,
604};
605
606static struct miscdevice lis3lv02d_misc_device = {
607 .minor = MISC_DYNAMIC_MINOR,
608 .name = "freefall",
609 .fops = &lis3lv02d_misc_fops,
610};
611
612int lis3lv02d_joystick_enable(void)
613{
614 struct input_dev *input_dev;
615 int err;
616 int max_val, fuzz, flat;
617 int btns[] = {BTN_X, BTN_Y, BTN_Z};
618
619 if (lis3_dev.idev)
620 return -EINVAL;
621
622 lis3_dev.idev = input_allocate_polled_device();
623 if (!lis3_dev.idev)
624 return -ENOMEM;
625
626 lis3_dev.idev->poll = lis3lv02d_joystick_poll;
627 lis3_dev.idev->open = lis3lv02d_joystick_open;
628 lis3_dev.idev->close = lis3lv02d_joystick_close;
629 lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
630 lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
631 lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
632 input_dev = lis3_dev.idev->input;
633
634 input_dev->name = "ST LIS3LV02DL Accelerometer";
635 input_dev->phys = DRIVER_NAME "/input0";
636 input_dev->id.bustype = BUS_HOST;
637 input_dev->id.vendor = 0;
638 input_dev->dev.parent = &lis3_dev.pdev->dev;
639
640 set_bit(EV_ABS, input_dev->evbit);
641 max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
642 if (lis3_dev.whoami == WAI_12B) {
643 fuzz = LIS3_DEFAULT_FUZZ_12B;
644 flat = LIS3_DEFAULT_FLAT_12B;
645 } else {
646 fuzz = LIS3_DEFAULT_FUZZ_8B;
647 flat = LIS3_DEFAULT_FLAT_8B;
648 }
649 fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
650 flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
651
652 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
653 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
654 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
655
656 lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns);
657 lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns);
658 lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns);
659
660 err = input_register_polled_device(lis3_dev.idev);
661 if (err) {
662 input_free_polled_device(lis3_dev.idev);
663 lis3_dev.idev = NULL;
664 }
665
666 return err;
667}
668EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
669
670void lis3lv02d_joystick_disable(void)
671{
672 if (lis3_dev.irq)
673 free_irq(lis3_dev.irq, &lis3_dev);
674 if (lis3_dev.pdata && lis3_dev.pdata->irq2)
675 free_irq(lis3_dev.pdata->irq2, &lis3_dev);
676
677 if (!lis3_dev.idev)
678 return;
679
680 if (lis3_dev.irq)
681 misc_deregister(&lis3lv02d_misc_device);
682 input_unregister_polled_device(lis3_dev.idev);
683 input_free_polled_device(lis3_dev.idev);
684 lis3_dev.idev = NULL;
685}
686EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
687
688/* Sysfs stuff */
689static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
690{
691 /*
692 * SYSFS functions are fast visitors so put-call
693 * immediately after the get-call. However, keep
694 * chip running for a while and schedule delayed
695 * suspend. This way periodic sysfs calls doesn't
696 * suffer from relatively long power up time.
697 */
698
699 if (lis3->pm_dev) {
700 pm_runtime_get_sync(lis3->pm_dev);
701 pm_runtime_put_noidle(lis3->pm_dev);
702 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
703 }
704}
705
706static ssize_t lis3lv02d_selftest_show(struct device *dev,
707 struct device_attribute *attr, char *buf)
708{
709 s16 values[3];
710
711 static const char ok[] = "OK";
712 static const char fail[] = "FAIL";
713 static const char irq[] = "FAIL_IRQ";
714 const char *res;
715
716 lis3lv02d_sysfs_poweron(&lis3_dev);
717 switch (lis3lv02d_selftest(&lis3_dev, values)) {
718 case SELFTEST_FAIL:
719 res = fail;
720 break;
721 case SELFTEST_IRQ:
722 res = irq;
723 break;
724 case SELFTEST_OK:
725 default:
726 res = ok;
727 break;
728 }
729 return sprintf(buf, "%s %d %d %d\n", res,
730 values[0], values[1], values[2]);
731}
732
733static ssize_t lis3lv02d_position_show(struct device *dev,
734 struct device_attribute *attr, char *buf)
735{
736 int x, y, z;
737
738 lis3lv02d_sysfs_poweron(&lis3_dev);
739 mutex_lock(&lis3_dev.mutex);
740 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
741 mutex_unlock(&lis3_dev.mutex);
742 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
743}
744
745static ssize_t lis3lv02d_rate_show(struct device *dev,
746 struct device_attribute *attr, char *buf)
747{
748 lis3lv02d_sysfs_poweron(&lis3_dev);
749 return sprintf(buf, "%d\n", lis3lv02d_get_odr());
750}
751
752static ssize_t lis3lv02d_rate_set(struct device *dev,
753 struct device_attribute *attr, const char *buf,
754 size_t count)
755{
756 unsigned long rate;
757
758 if (strict_strtoul(buf, 0, &rate))
759 return -EINVAL;
760
761 lis3lv02d_sysfs_poweron(&lis3_dev);
762 if (lis3lv02d_set_odr(rate))
763 return -EINVAL;
764
765 return count;
766}
767
768static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
769static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
770static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
771 lis3lv02d_rate_set);
772
773static struct attribute *lis3lv02d_attributes[] = {
774 &dev_attr_selftest.attr,
775 &dev_attr_position.attr,
776 &dev_attr_rate.attr,
777 NULL
778};
779
780static struct attribute_group lis3lv02d_attribute_group = {
781 .attrs = lis3lv02d_attributes
782};
783
784
785static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
786{
787 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
788 if (IS_ERR(lis3->pdev))
789 return PTR_ERR(lis3->pdev);
790
791 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
792}
793
794int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
795{
796 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
797 platform_device_unregister(lis3->pdev);
798 if (lis3->pm_dev) {
799 /* Barrier after the sysfs remove */
800 pm_runtime_barrier(lis3->pm_dev);
801
802 /* SYSFS may have left chip running. Turn off if necessary */
803 if (!pm_runtime_suspended(lis3->pm_dev))
804 lis3lv02d_poweroff(&lis3_dev);
805
806 pm_runtime_disable(lis3->pm_dev);
807 pm_runtime_set_suspended(lis3->pm_dev);
808 }
809 kfree(lis3->reg_cache);
810 return 0;
811}
812EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
813
814static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
815 struct lis3lv02d_platform_data *p)
816{
817 int err;
818 int ctrl2 = p->hipass_ctrl;
819
820 if (p->click_flags) {
821 dev->write(dev, CLICK_CFG, p->click_flags);
822 dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
823 dev->write(dev, CLICK_LATENCY, p->click_latency);
824 dev->write(dev, CLICK_WINDOW, p->click_window);
825 dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
826 dev->write(dev, CLICK_THSY_X,
827 (p->click_thresh_x & 0xf) |
828 (p->click_thresh_y << 4));
829
830 if (dev->idev) {
831 struct input_dev *input_dev = lis3_dev.idev->input;
832 input_set_capability(input_dev, EV_KEY, BTN_X);
833 input_set_capability(input_dev, EV_KEY, BTN_Y);
834 input_set_capability(input_dev, EV_KEY, BTN_Z);
835 }
836 }
837
838 if (p->wakeup_flags) {
839 dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
840 dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
841 /* pdata value + 1 to keep this backward compatible*/
842 dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
843 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
844 }
845
846 if (p->wakeup_flags2) {
847 dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
848 dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
849 /* pdata value + 1 to keep this backward compatible*/
850 dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
851 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
852 }
853 /* Configure hipass filters */
854 dev->write(dev, CTRL_REG2, ctrl2);
855
856 if (p->irq2) {
857 err = request_threaded_irq(p->irq2,
858 NULL,
859 lis302dl_interrupt_thread2_8b,
860 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
861 (p->irq_flags2 & IRQF_TRIGGER_MASK),
862 DRIVER_NAME, &lis3_dev);
863 if (err < 0)
864 pr_err("No second IRQ. Limited functionality\n");
865 }
866}
867
868/*
869 * Initialise the accelerometer and the various subsystems.
870 * Should be rather independent of the bus system.
871 */
872int lis3lv02d_init_device(struct lis3lv02d *dev)
873{
874 int err;
875 irq_handler_t thread_fn;
876 int irq_flags = 0;
877
878 dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
879
880 switch (dev->whoami) {
881 case WAI_12B:
882 pr_info("12 bits sensor found\n");
883 dev->read_data = lis3lv02d_read_12;
884 dev->mdps_max_val = 2048;
885 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
886 dev->odrs = lis3_12_rates;
887 dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
888 dev->scale = LIS3_SENSITIVITY_12B;
889 dev->regs = lis3_wai12_regs;
890 dev->regs_size = ARRAY_SIZE(lis3_wai12_regs);
891 break;
892 case WAI_8B:
893 pr_info("8 bits sensor found\n");
894 dev->read_data = lis3lv02d_read_8;
895 dev->mdps_max_val = 128;
896 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
897 dev->odrs = lis3_8_rates;
898 dev->odr_mask = CTRL1_DR;
899 dev->scale = LIS3_SENSITIVITY_8B;
900 dev->regs = lis3_wai8_regs;
901 dev->regs_size = ARRAY_SIZE(lis3_wai8_regs);
902 break;
903 case WAI_3DC:
904 pr_info("8 bits 3DC sensor found\n");
905 dev->read_data = lis3lv02d_read_8;
906 dev->mdps_max_val = 128;
907 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
908 dev->odrs = lis3_3dc_rates;
909 dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
910 dev->scale = LIS3_SENSITIVITY_8B;
911 break;
912 default:
913 pr_err("unknown sensor type 0x%X\n", dev->whoami);
914 return -EINVAL;
915 }
916
917 dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
918 sizeof(lis3_wai12_regs)), GFP_KERNEL);
919
920 if (dev->reg_cache == NULL) {
921 printk(KERN_ERR DRIVER_NAME "out of memory\n");
922 return -ENOMEM;
923 }
924
925 mutex_init(&dev->mutex);
926 atomic_set(&dev->wake_thread, 0);
927
928 lis3lv02d_add_fs(dev);
929 lis3lv02d_poweron(dev);
930
931 if (dev->pm_dev) {
932 pm_runtime_set_active(dev->pm_dev);
933 pm_runtime_enable(dev->pm_dev);
934 }
935
936 if (lis3lv02d_joystick_enable())
937 pr_err("joystick initialization failed\n");
938
939 /* passing in platform specific data is purely optional and only
940 * used by the SPI transport layer at the moment */
941 if (dev->pdata) {
942 struct lis3lv02d_platform_data *p = dev->pdata;
943
944 if (dev->whoami == WAI_8B)
945 lis3lv02d_8b_configure(dev, p);
946
947 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
948
949 dev->irq_cfg = p->irq_cfg;
950 if (p->irq_cfg)
951 dev->write(dev, CTRL_REG3, p->irq_cfg);
952
953 if (p->default_rate)
954 lis3lv02d_set_odr(p->default_rate);
955 }
956
957 /* bail if we did not get an IRQ from the bus layer */
958 if (!dev->irq) {
959 pr_debug("No IRQ. Disabling /dev/freefall\n");
960 goto out;
961 }
962
963 /*
964 * The sensor can generate interrupts for free-fall and direction
965 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
966 * the things simple and _fast_ we activate it only for free-fall, so
967 * no need to read register (very slow with ACPI). For the same reason,
968 * we forbid shared interrupts.
969 *
970 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
971 * io-apic is not configurable (and generates a warning) but I keep it
972 * in case of support for other hardware.
973 */
974 if (dev->pdata && dev->whoami == WAI_8B)
975 thread_fn = lis302dl_interrupt_thread1_8b;
976 else
977 thread_fn = NULL;
978
979 err = request_threaded_irq(dev->irq, lis302dl_interrupt,
980 thread_fn,
981 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
982 irq_flags,
983 DRIVER_NAME, &lis3_dev);
984
985 if (err < 0) {
986 pr_err("Cannot get IRQ\n");
987 goto out;
988 }
989
990 if (misc_register(&lis3lv02d_misc_device))
991 pr_err("misc_register failed\n");
992out:
993 return 0;
994}
995EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
996
997MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
998MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
999MODULE_LICENSE("GPL");
diff --git a/drivers/misc/lis3lv02d/lis3lv02d.h b/drivers/misc/lis3lv02d/lis3lv02d.h
new file mode 100644
index 00000000000..a1939589eb2
--- /dev/null
+++ b/drivers/misc/lis3lv02d/lis3lv02d.h
@@ -0,0 +1,291 @@
1/*
2 * lis3lv02d.h - ST LIS3LV02DL accelerometer driver
3 *
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008-2009 Eric Piel
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21#include <linux/platform_device.h>
22#include <linux/input-polldev.h>
23#include <linux/regulator/consumer.h>
24
25/*
26 * This driver tries to support the "digital" accelerometer chips from
27 * STMicroelectronics such as LIS3LV02DL, LIS302DL, LIS3L02DQ, LIS331DL,
28 * LIS35DE, or LIS202DL. They are very similar in terms of programming, with
29 * almost the same registers. In addition to differing on physical properties,
30 * they differ on the number of axes (2/3), precision (8/12 bits), and special
31 * features (freefall detection, click...). Unfortunately, not all the
32 * differences can be probed via a register.
33 * They can be connected either via I²C or SPI.
34 */
35
36#include <linux/lis3lv02d.h>
37
38enum lis3_reg {
39 WHO_AM_I = 0x0F,
40 OFFSET_X = 0x16,
41 OFFSET_Y = 0x17,
42 OFFSET_Z = 0x18,
43 GAIN_X = 0x19,
44 GAIN_Y = 0x1A,
45 GAIN_Z = 0x1B,
46 CTRL_REG1 = 0x20,
47 CTRL_REG2 = 0x21,
48 CTRL_REG3 = 0x22,
49 CTRL_REG4 = 0x23,
50 HP_FILTER_RESET = 0x23,
51 STATUS_REG = 0x27,
52 OUTX_L = 0x28,
53 OUTX_H = 0x29,
54 OUTX = 0x29,
55 OUTY_L = 0x2A,
56 OUTY_H = 0x2B,
57 OUTY = 0x2B,
58 OUTZ_L = 0x2C,
59 OUTZ_H = 0x2D,
60 OUTZ = 0x2D,
61};
62
63enum lis302d_reg {
64 FF_WU_CFG_1 = 0x30,
65 FF_WU_SRC_1 = 0x31,
66 FF_WU_THS_1 = 0x32,
67 FF_WU_DURATION_1 = 0x33,
68 FF_WU_CFG_2 = 0x34,
69 FF_WU_SRC_2 = 0x35,
70 FF_WU_THS_2 = 0x36,
71 FF_WU_DURATION_2 = 0x37,
72 CLICK_CFG = 0x38,
73 CLICK_SRC = 0x39,
74 CLICK_THSY_X = 0x3B,
75 CLICK_THSZ = 0x3C,
76 CLICK_TIMELIMIT = 0x3D,
77 CLICK_LATENCY = 0x3E,
78 CLICK_WINDOW = 0x3F,
79};
80
81enum lis3lv02d_reg {
82 FF_WU_CFG = 0x30,
83 FF_WU_SRC = 0x31,
84 FF_WU_ACK = 0x32,
85 FF_WU_THS_L = 0x34,
86 FF_WU_THS_H = 0x35,
87 FF_WU_DURATION = 0x36,
88 DD_CFG = 0x38,
89 DD_SRC = 0x39,
90 DD_ACK = 0x3A,
91 DD_THSI_L = 0x3C,
92 DD_THSI_H = 0x3D,
93 DD_THSE_L = 0x3E,
94 DD_THSE_H = 0x3F,
95};
96
97enum lis3_who_am_i {
98 WAI_3DC = 0x33, /* 8 bits: LIS3DC, HP3DC */
99 WAI_12B = 0x3A, /* 12 bits: LIS3LV02D[LQ]... */
100 WAI_8B = 0x3B, /* 8 bits: LIS[23]02D[LQ]... */
101 WAI_6B = 0x52, /* 6 bits: LIS331DLF - not supported */
102};
103
104enum lis3lv02d_ctrl1_12b {
105 CTRL1_Xen = 0x01,
106 CTRL1_Yen = 0x02,
107 CTRL1_Zen = 0x04,
108 CTRL1_ST = 0x08,
109 CTRL1_DF0 = 0x10,
110 CTRL1_DF1 = 0x20,
111 CTRL1_PD0 = 0x40,
112 CTRL1_PD1 = 0x80,
113};
114
115/* Delta to ctrl1_12b version */
116enum lis3lv02d_ctrl1_8b {
117 CTRL1_STM = 0x08,
118 CTRL1_STP = 0x10,
119 CTRL1_FS = 0x20,
120 CTRL1_PD = 0x40,
121 CTRL1_DR = 0x80,
122};
123
124enum lis3lv02d_ctrl1_3dc {
125 CTRL1_ODR0 = 0x10,
126 CTRL1_ODR1 = 0x20,
127 CTRL1_ODR2 = 0x40,
128 CTRL1_ODR3 = 0x80,
129};
130
131enum lis3lv02d_ctrl2 {
132 CTRL2_DAS = 0x01,
133 CTRL2_SIM = 0x02,
134 CTRL2_DRDY = 0x04,
135 CTRL2_IEN = 0x08,
136 CTRL2_BOOT = 0x10,
137 CTRL2_BLE = 0x20,
138 CTRL2_BDU = 0x40, /* Block Data Update */
139 CTRL2_FS = 0x80, /* Full Scale selection */
140};
141
142enum lis3lv02d_ctrl4_3dc {
143 CTRL4_SIM = 0x01,
144 CTRL4_ST0 = 0x02,
145 CTRL4_ST1 = 0x04,
146 CTRL4_FS0 = 0x10,
147 CTRL4_FS1 = 0x20,
148};
149
150enum lis302d_ctrl2 {
151 HP_FF_WU2 = 0x08,
152 HP_FF_WU1 = 0x04,
153 CTRL2_BOOT_8B = 0x40,
154};
155
156enum lis3lv02d_ctrl3 {
157 CTRL3_CFS0 = 0x01,
158 CTRL3_CFS1 = 0x02,
159 CTRL3_FDS = 0x10,
160 CTRL3_HPFF = 0x20,
161 CTRL3_HPDD = 0x40,
162 CTRL3_ECK = 0x80,
163};
164
165enum lis3lv02d_status_reg {
166 STATUS_XDA = 0x01,
167 STATUS_YDA = 0x02,
168 STATUS_ZDA = 0x04,
169 STATUS_XYZDA = 0x08,
170 STATUS_XOR = 0x10,
171 STATUS_YOR = 0x20,
172 STATUS_ZOR = 0x40,
173 STATUS_XYZOR = 0x80,
174};
175
176enum lis3lv02d_ff_wu_cfg {
177 FF_WU_CFG_XLIE = 0x01,
178 FF_WU_CFG_XHIE = 0x02,
179 FF_WU_CFG_YLIE = 0x04,
180 FF_WU_CFG_YHIE = 0x08,
181 FF_WU_CFG_ZLIE = 0x10,
182 FF_WU_CFG_ZHIE = 0x20,
183 FF_WU_CFG_LIR = 0x40,
184 FF_WU_CFG_AOI = 0x80,
185};
186
187enum lis3lv02d_ff_wu_src {
188 FF_WU_SRC_XL = 0x01,
189 FF_WU_SRC_XH = 0x02,
190 FF_WU_SRC_YL = 0x04,
191 FF_WU_SRC_YH = 0x08,
192 FF_WU_SRC_ZL = 0x10,
193 FF_WU_SRC_ZH = 0x20,
194 FF_WU_SRC_IA = 0x40,
195};
196
197enum lis3lv02d_dd_cfg {
198 DD_CFG_XLIE = 0x01,
199 DD_CFG_XHIE = 0x02,
200 DD_CFG_YLIE = 0x04,
201 DD_CFG_YHIE = 0x08,
202 DD_CFG_ZLIE = 0x10,
203 DD_CFG_ZHIE = 0x20,
204 DD_CFG_LIR = 0x40,
205 DD_CFG_IEND = 0x80,
206};
207
208enum lis3lv02d_dd_src {
209 DD_SRC_XL = 0x01,
210 DD_SRC_XH = 0x02,
211 DD_SRC_YL = 0x04,
212 DD_SRC_YH = 0x08,
213 DD_SRC_ZL = 0x10,
214 DD_SRC_ZH = 0x20,
215 DD_SRC_IA = 0x40,
216};
217
218enum lis3lv02d_click_src_8b {
219 CLICK_SINGLE_X = 0x01,
220 CLICK_DOUBLE_X = 0x02,
221 CLICK_SINGLE_Y = 0x04,
222 CLICK_DOUBLE_Y = 0x08,
223 CLICK_SINGLE_Z = 0x10,
224 CLICK_DOUBLE_Z = 0x20,
225 CLICK_IA = 0x40,
226};
227
228enum lis3lv02d_reg_state {
229 LIS3_REG_OFF = 0x00,
230 LIS3_REG_ON = 0x01,
231};
232
233union axis_conversion {
234 struct {
235 int x, y, z;
236 };
237 int as_array[3];
238
239};
240
241struct lis3lv02d {
242 void *bus_priv; /* used by the bus layer only */
243 struct device *pm_dev; /* for pm_runtime purposes */
244 int (*init) (struct lis3lv02d *lis3);
245 int (*write) (struct lis3lv02d *lis3, int reg, u8 val);
246 int (*read) (struct lis3lv02d *lis3, int reg, u8 *ret);
247 int (*blkread) (struct lis3lv02d *lis3, int reg, int len, u8 *ret);
248 int (*reg_ctrl) (struct lis3lv02d *lis3, bool state);
249
250 int *odrs; /* Supported output data rates */
251 u8 *regs; /* Regs to store / restore */
252 int regs_size;
253 u8 *reg_cache;
254 bool regs_stored;
255 u8 odr_mask; /* ODR bit mask */
256 u8 whoami; /* indicates measurement precision */
257 s16 (*read_data) (struct lis3lv02d *lis3, int reg);
258 int mdps_max_val;
259 int pwron_delay;
260 int scale; /*
261 * relationship between 1 LBS and mG
262 * (1/1000th of earth gravity)
263 */
264
265 struct input_polled_dev *idev; /* input device */
266 struct platform_device *pdev; /* platform device */
267 struct regulator_bulk_data regulators[2];
268 atomic_t count; /* interrupt count after last read */
269 union axis_conversion ac; /* hw -> logical axis */
270 int mapped_btns[3];
271
272 u32 irq; /* IRQ number */
273 struct fasync_struct *async_queue; /* queue for the misc device */
274 wait_queue_head_t misc_wait; /* Wait queue for the misc device */
275 unsigned long misc_opened; /* bit0: whether the device is open */
276 int data_ready_count[2];
277 atomic_t wake_thread;
278 unsigned char irq_cfg;
279
280 struct lis3lv02d_platform_data *pdata; /* for passing board config */
281 struct mutex mutex; /* Serialize poll and selftest */
282};
283
284int lis3lv02d_init_device(struct lis3lv02d *lis3);
285int lis3lv02d_joystick_enable(void);
286void lis3lv02d_joystick_disable(void);
287void lis3lv02d_poweroff(struct lis3lv02d *lis3);
288void lis3lv02d_poweron(struct lis3lv02d *lis3);
289int lis3lv02d_remove_fs(struct lis3lv02d *lis3);
290
291extern struct lis3lv02d lis3_dev;
diff --git a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
new file mode 100644
index 00000000000..b20dfb4522d
--- /dev/null
+++ b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
@@ -0,0 +1,279 @@
1/*
2 * drivers/hwmon/lis3lv02d_i2c.c
3 *
4 * Implements I2C interface for lis3lv02d (STMicroelectronics) accelerometer.
5 * Driver is based on corresponding SPI driver written by Daniel Mack
6 * (lis3lv02d_spi.c (C) 2009 Daniel Mack <daniel@caiaq.de> ).
7 *
8 * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
9 *
10 * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * version 2 as published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24 * 02110-1301 USA
25 */
26
27#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/init.h>
30#include <linux/err.h>
31#include <linux/i2c.h>
32#include <linux/pm_runtime.h>
33#include <linux/delay.h>
34#include "lis3lv02d.h"
35
36#define DRV_NAME "lis3lv02d_i2c"
37
38static const char reg_vdd[] = "Vdd";
39static const char reg_vdd_io[] = "Vdd_IO";
40
41static int lis3_reg_ctrl(struct lis3lv02d *lis3, bool state)
42{
43 int ret;
44 if (state == LIS3_REG_OFF) {
45 ret = regulator_bulk_disable(ARRAY_SIZE(lis3->regulators),
46 lis3->regulators);
47 } else {
48 ret = regulator_bulk_enable(ARRAY_SIZE(lis3->regulators),
49 lis3->regulators);
50 /* Chip needs time to wakeup. Not mentioned in datasheet */
51 usleep_range(10000, 20000);
52 }
53 return ret;
54}
55
56static inline s32 lis3_i2c_write(struct lis3lv02d *lis3, int reg, u8 value)
57{
58 struct i2c_client *c = lis3->bus_priv;
59 return i2c_smbus_write_byte_data(c, reg, value);
60}
61
62static inline s32 lis3_i2c_read(struct lis3lv02d *lis3, int reg, u8 *v)
63{
64 struct i2c_client *c = lis3->bus_priv;
65 *v = i2c_smbus_read_byte_data(c, reg);
66 return 0;
67}
68
69static inline s32 lis3_i2c_blockread(struct lis3lv02d *lis3, int reg, int len,
70 u8 *v)
71{
72 struct i2c_client *c = lis3->bus_priv;
73 reg |= (1 << 7); /* 7th bit enables address auto incrementation */
74 return i2c_smbus_read_i2c_block_data(c, reg, len, v);
75}
76
77static int lis3_i2c_init(struct lis3lv02d *lis3)
78{
79 u8 reg;
80 int ret;
81
82 if (lis3->reg_ctrl)
83 lis3_reg_ctrl(lis3, LIS3_REG_ON);
84
85 lis3->read(lis3, WHO_AM_I, &reg);
86 if (reg != lis3->whoami)
87 printk(KERN_ERR "lis3: power on failure\n");
88
89 /* power up the device */
90 ret = lis3->read(lis3, CTRL_REG1, &reg);
91 if (ret < 0)
92 return ret;
93
94 reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
95 return lis3->write(lis3, CTRL_REG1, reg);
96}
97
98/* Default axis mapping but it can be overwritten by platform data */
99static union axis_conversion lis3lv02d_axis_map =
100 { .as_array = { LIS3_DEV_X, LIS3_DEV_Y, LIS3_DEV_Z } };
101
102static int __devinit lis3lv02d_i2c_probe(struct i2c_client *client,
103 const struct i2c_device_id *id)
104{
105 int ret = 0;
106 struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
107
108 if (pdata) {
109 /* Regulator control is optional */
110 if (pdata->driver_features & LIS3_USE_REGULATOR_CTRL)
111 lis3_dev.reg_ctrl = lis3_reg_ctrl;
112
113 if ((pdata->driver_features & LIS3_USE_BLOCK_READ) &&
114 (i2c_check_functionality(client->adapter,
115 I2C_FUNC_SMBUS_I2C_BLOCK)))
116 lis3_dev.blkread = lis3_i2c_blockread;
117
118 if (pdata->axis_x)
119 lis3lv02d_axis_map.x = pdata->axis_x;
120
121 if (pdata->axis_y)
122 lis3lv02d_axis_map.y = pdata->axis_y;
123
124 if (pdata->axis_z)
125 lis3lv02d_axis_map.z = pdata->axis_z;
126
127 if (pdata->setup_resources)
128 ret = pdata->setup_resources();
129
130 if (ret)
131 goto fail;
132 }
133
134 if (lis3_dev.reg_ctrl) {
135 lis3_dev.regulators[0].supply = reg_vdd;
136 lis3_dev.regulators[1].supply = reg_vdd_io;
137 ret = regulator_bulk_get(&client->dev,
138 ARRAY_SIZE(lis3_dev.regulators),
139 lis3_dev.regulators);
140 if (ret < 0)
141 goto fail;
142 }
143
144 lis3_dev.pdata = pdata;
145 lis3_dev.bus_priv = client;
146 lis3_dev.init = lis3_i2c_init;
147 lis3_dev.read = lis3_i2c_read;
148 lis3_dev.write = lis3_i2c_write;
149 lis3_dev.irq = client->irq;
150 lis3_dev.ac = lis3lv02d_axis_map;
151 lis3_dev.pm_dev = &client->dev;
152
153 i2c_set_clientdata(client, &lis3_dev);
154
155 /* Provide power over the init call */
156 if (lis3_dev.reg_ctrl)
157 lis3_reg_ctrl(&lis3_dev, LIS3_REG_ON);
158
159 ret = lis3lv02d_init_device(&lis3_dev);
160
161 if (lis3_dev.reg_ctrl)
162 lis3_reg_ctrl(&lis3_dev, LIS3_REG_OFF);
163
164 if (ret == 0)
165 return 0;
166fail:
167 if (pdata && pdata->release_resources)
168 pdata->release_resources();
169 return ret;
170}
171
172static int __devexit lis3lv02d_i2c_remove(struct i2c_client *client)
173{
174 struct lis3lv02d *lis3 = i2c_get_clientdata(client);
175 struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
176
177 if (pdata && pdata->release_resources)
178 pdata->release_resources();
179
180 lis3lv02d_joystick_disable();
181 lis3lv02d_remove_fs(&lis3_dev);
182
183 if (lis3_dev.reg_ctrl)
184 regulator_bulk_free(ARRAY_SIZE(lis3->regulators),
185 lis3_dev.regulators);
186 return 0;
187}
188
189#ifdef CONFIG_PM_SLEEP
190static int lis3lv02d_i2c_suspend(struct device *dev)
191{
192 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
193 struct lis3lv02d *lis3 = i2c_get_clientdata(client);
194
195 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
196 lis3lv02d_poweroff(lis3);
197 return 0;
198}
199
200static int lis3lv02d_i2c_resume(struct device *dev)
201{
202 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
203 struct lis3lv02d *lis3 = i2c_get_clientdata(client);
204
205 /*
206 * pm_runtime documentation says that devices should always
207 * be powered on at resume. Pm_runtime turns them off after system
208 * wide resume is complete.
209 */
210 if (!lis3->pdata || !lis3->pdata->wakeup_flags ||
211 pm_runtime_suspended(dev))
212 lis3lv02d_poweron(lis3);
213
214 return 0;
215}
216#endif /* CONFIG_PM_SLEEP */
217
218#ifdef CONFIG_PM_RUNTIME
219static int lis3_i2c_runtime_suspend(struct device *dev)
220{
221 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
222 struct lis3lv02d *lis3 = i2c_get_clientdata(client);
223
224 lis3lv02d_poweroff(lis3);
225 return 0;
226}
227
228static int lis3_i2c_runtime_resume(struct device *dev)
229{
230 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
231 struct lis3lv02d *lis3 = i2c_get_clientdata(client);
232
233 lis3lv02d_poweron(lis3);
234 return 0;
235}
236#endif /* CONFIG_PM_RUNTIME */
237
238static const struct i2c_device_id lis3lv02d_id[] = {
239 {"lis3lv02d", 0 },
240 {}
241};
242
243MODULE_DEVICE_TABLE(i2c, lis3lv02d_id);
244
245static const struct dev_pm_ops lis3_pm_ops = {
246 SET_SYSTEM_SLEEP_PM_OPS(lis3lv02d_i2c_suspend,
247 lis3lv02d_i2c_resume)
248 SET_RUNTIME_PM_OPS(lis3_i2c_runtime_suspend,
249 lis3_i2c_runtime_resume,
250 NULL)
251};
252
253static struct i2c_driver lis3lv02d_i2c_driver = {
254 .driver = {
255 .name = DRV_NAME,
256 .owner = THIS_MODULE,
257 .pm = &lis3_pm_ops,
258 },
259 .probe = lis3lv02d_i2c_probe,
260 .remove = __devexit_p(lis3lv02d_i2c_remove),
261 .id_table = lis3lv02d_id,
262};
263
264static int __init lis3lv02d_init(void)
265{
266 return i2c_add_driver(&lis3lv02d_i2c_driver);
267}
268
269static void __exit lis3lv02d_exit(void)
270{
271 i2c_del_driver(&lis3lv02d_i2c_driver);
272}
273
274MODULE_AUTHOR("Nokia Corporation");
275MODULE_DESCRIPTION("lis3lv02d I2C interface");
276MODULE_LICENSE("GPL");
277
278module_init(lis3lv02d_init);
279module_exit(lis3lv02d_exit);
diff --git a/drivers/misc/lis3lv02d/lis3lv02d_spi.c b/drivers/misc/lis3lv02d/lis3lv02d_spi.c
new file mode 100644
index 00000000000..c1f8a8fbf69
--- /dev/null
+++ b/drivers/misc/lis3lv02d/lis3lv02d_spi.c
@@ -0,0 +1,145 @@
1/*
2 * lis3lv02d_spi - SPI glue layer for lis3lv02d
3 *
4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.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 version 2 as
8 * publishhed by the Free Software Foundation.
9 */
10
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/err.h>
15#include <linux/input.h>
16#include <linux/interrupt.h>
17#include <linux/workqueue.h>
18#include <linux/spi/spi.h>
19#include <linux/pm.h>
20
21#include "lis3lv02d.h"
22
23#define DRV_NAME "lis3lv02d_spi"
24#define LIS3_SPI_READ 0x80
25
26static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
27{
28 struct spi_device *spi = lis3->bus_priv;
29 int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
30 if (ret < 0)
31 return -EINVAL;
32
33 *v = (u8) ret;
34 return 0;
35}
36
37static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
38{
39 u8 tmp[2] = { reg, val };
40 struct spi_device *spi = lis3->bus_priv;
41 return spi_write(spi, tmp, sizeof(tmp));
42}
43
44static int lis3_spi_init(struct lis3lv02d *lis3)
45{
46 u8 reg;
47 int ret;
48
49 /* power up the device */
50 ret = lis3->read(lis3, CTRL_REG1, &reg);
51 if (ret < 0)
52 return ret;
53
54 reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
55 return lis3->write(lis3, CTRL_REG1, reg);
56}
57
58static union axis_conversion lis3lv02d_axis_normal =
59 { .as_array = { 1, 2, 3 } };
60
61static int __devinit lis302dl_spi_probe(struct spi_device *spi)
62{
63 int ret;
64
65 spi->bits_per_word = 8;
66 spi->mode = SPI_MODE_0;
67 ret = spi_setup(spi);
68 if (ret < 0)
69 return ret;
70
71 lis3_dev.bus_priv = spi;
72 lis3_dev.init = lis3_spi_init;
73 lis3_dev.read = lis3_spi_read;
74 lis3_dev.write = lis3_spi_write;
75 lis3_dev.irq = spi->irq;
76 lis3_dev.ac = lis3lv02d_axis_normal;
77 lis3_dev.pdata = spi->dev.platform_data;
78 spi_set_drvdata(spi, &lis3_dev);
79
80 return lis3lv02d_init_device(&lis3_dev);
81}
82
83static int __devexit lis302dl_spi_remove(struct spi_device *spi)
84{
85 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
86 lis3lv02d_joystick_disable();
87 lis3lv02d_poweroff(lis3);
88
89 return lis3lv02d_remove_fs(&lis3_dev);
90}
91
92#ifdef CONFIG_PM_SLEEP
93static int lis3lv02d_spi_suspend(struct device *dev)
94{
95 struct spi_device *spi = to_spi_device(dev);
96 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
97
98 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
99 lis3lv02d_poweroff(&lis3_dev);
100
101 return 0;
102}
103
104static int lis3lv02d_spi_resume(struct device *dev)
105{
106 struct spi_device *spi = to_spi_device(dev);
107 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
108
109 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
110 lis3lv02d_poweron(lis3);
111
112 return 0;
113}
114#endif
115
116static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
117 lis3lv02d_spi_resume);
118
119static struct spi_driver lis302dl_spi_driver = {
120 .driver = {
121 .name = DRV_NAME,
122 .owner = THIS_MODULE,
123 .pm = &lis3lv02d_spi_pm,
124 },
125 .probe = lis302dl_spi_probe,
126 .remove = __devexit_p(lis302dl_spi_remove),
127};
128
129static int __init lis302dl_init(void)
130{
131 return spi_register_driver(&lis302dl_spi_driver);
132}
133
134static void __exit lis302dl_exit(void)
135{
136 spi_unregister_driver(&lis302dl_spi_driver);
137}
138
139module_init(lis302dl_init);
140module_exit(lis302dl_exit);
141
142MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
143MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
144MODULE_LICENSE("GPL");
145MODULE_ALIAS("spi:" DRV_NAME);
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-09 05:15:28 -0500