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-rw-r--r--Documentation/hwmon/w83l786ng54
-rw-r--r--drivers/hwmon/Kconfig10
-rw-r--r--drivers/hwmon/Makefile1
-rw-r--r--drivers/hwmon/w83l786ng.c821
4 files changed, 886 insertions, 0 deletions
diff --git a/Documentation/hwmon/w83l786ng b/Documentation/hwmon/w83l786ng
new file mode 100644
index 000000000000..d8f55d7fff10
--- /dev/null
+++ b/Documentation/hwmon/w83l786ng
@@ -0,0 +1,54 @@
1Kernel driver w83l786ng
2=====================
3
4Supported chips:
5 * Winbond W83L786NG/W83L786NR
6 Prefix: 'w83l786ng'
7 Addresses scanned: I2C 0x2e - 0x2f
8 Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L786NRNG09.pdf
9
10Author: Kevin Lo <kevlo@kevlo.org>
11
12
13Module Parameters
14-----------------
15
16* reset boolean
17 (default 0)
18 Use 'reset=1' to reset the chip (via index 0x40, bit 7). The default
19 behavior is no chip reset to preserve BIOS settings
20
21
22Description
23-----------
24
25This driver implements support for Winbond W83L786NG/W83L786NR chips.
26
27The driver implements two temperature sensors, two fan rotation speed
28sensors, and three voltage sensors.
29
30Temperatures are measured in degrees Celsius and measurement resolution is 1
31degC for temp1 and temp2.
32
33Fan rotation speeds are reported in RPM (rotations per minute). Fan readings
34readings can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64
35or 128 for fan 1/2) to give the readings more range or accuracy.
36
37Voltage sensors (also known as IN sensors) report their values in millivolts.
38An alarm is triggered if the voltage has crossed a programmable minimum
39or maximum limit.
40
41/sys files
42----------
43
44pwm[1-2] - this file stores PWM duty cycle or DC value (fan speed) in range:
45 0 (stop) to 255 (full)
46pwm[1-2]_enable - this file controls mode of fan/temperature control:
47 * 0 Manual Mode
48 * 1 Thermal Cruise
49 * 2 Smart Fan II
50 * 4 FAN_SET
51pwm[1-2]_mode - Select PWM of DC mode
52 * 0 DC
53 * 1 PWM
54tolerance[1-2] - Value in degrees of Celsius (degC) for +- T
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index a0445bea9f75..a2187df5cc78 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -683,6 +683,16 @@ config SENSORS_W83L785TS
683 This driver can also be built as a module. If so, the module 683 This driver can also be built as a module. If so, the module
684 will be called w83l785ts. 684 will be called w83l785ts.
685 685
686config SENSORS_W83L786NG
687 tristate "Winbond W83L786NG, W83L786NR"
688 depends on I2C && EXPERIMENTAL
689 help
690 If you say yes here you get support for the Winbond W83L786NG
691 and W83L786NR sensor chips.
692
693 This driver can also be built as a module. If so, the module
694 will be called w83l786ng.
695
686config SENSORS_W83627HF 696config SENSORS_W83627HF
687 tristate "Winbond W83627HF, W83627THF, W83637HF, W83687THF, W83697HF" 697 tristate "Winbond W83627HF, W83627THF, W83637HF, W83687THF, W83697HF"
688 select HWMON_VID 698 select HWMON_VID
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 55595f6e1aa6..77a3e093c247 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_SENSORS_VT1211) += vt1211.o
68obj-$(CONFIG_SENSORS_VT8231) += vt8231.o 68obj-$(CONFIG_SENSORS_VT8231) += vt8231.o
69obj-$(CONFIG_SENSORS_W83627EHF) += w83627ehf.o 69obj-$(CONFIG_SENSORS_W83627EHF) += w83627ehf.o
70obj-$(CONFIG_SENSORS_W83L785TS) += w83l785ts.o 70obj-$(CONFIG_SENSORS_W83L785TS) += w83l785ts.o
71obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o
71 72
72ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y) 73ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y)
73EXTRA_CFLAGS += -DDEBUG 74EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/hwmon/w83l786ng.c b/drivers/hwmon/w83l786ng.c
new file mode 100644
index 000000000000..1dbee4fa23ad
--- /dev/null
+++ b/drivers/hwmon/w83l786ng.c
@@ -0,0 +1,821 @@
1/*
2 w83l786ng.c - Linux kernel driver for hardware monitoring
3 Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org>
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 - version 2.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 02110-1301 USA.
18*/
19
20/*
21 Supports following chips:
22
23 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
24 w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no
25*/
26
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/slab.h>
30#include <linux/i2c.h>
31#include <linux/hwmon.h>
32#include <linux/hwmon-vid.h>
33#include <linux/hwmon-sysfs.h>
34#include <linux/err.h>
35#include <linux/mutex.h>
36
37/* Addresses to scan */
38static unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
39
40/* Insmod parameters */
41I2C_CLIENT_INSMOD_1(w83l786ng);
42
43static int reset;
44module_param(reset, bool, 0);
45MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
46
47#define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2)
48#define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2)
49#define W83L786NG_REG_IN(nr) ((nr) + 0x20)
50
51#define W83L786NG_REG_FAN(nr) ((nr) + 0x28)
52#define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B)
53
54#define W83L786NG_REG_CONFIG 0x40
55#define W83L786NG_REG_ALARM1 0x41
56#define W83L786NG_REG_ALARM2 0x42
57#define W83L786NG_REG_GPIO_EN 0x47
58#define W83L786NG_REG_MAN_ID2 0x4C
59#define W83L786NG_REG_MAN_ID1 0x4D
60#define W83L786NG_REG_CHIP_ID 0x4E
61
62#define W83L786NG_REG_DIODE 0x53
63#define W83L786NG_REG_FAN_DIV 0x54
64#define W83L786NG_REG_FAN_CFG 0x80
65
66#define W83L786NG_REG_TOLERANCE 0x8D
67
68static const u8 W83L786NG_REG_TEMP[2][3] = {
69 { 0x25, /* TEMP 0 in DataSheet */
70 0x35, /* TEMP 0 Over in DataSheet */
71 0x36 }, /* TEMP 0 Hyst in DataSheet */
72 { 0x26, /* TEMP 1 in DataSheet */
73 0x37, /* TEMP 1 Over in DataSheet */
74 0x38 } /* TEMP 1 Hyst in DataSheet */
75};
76
77static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
78static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
79
80/* FAN Duty Cycle, be used to control */
81static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
82
83
84static inline u8
85FAN_TO_REG(long rpm, int div)
86{
87 if (rpm == 0)
88 return 255;
89 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
90 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
91}
92
93#define FAN_FROM_REG(val,div) ((val) == 0 ? -1 : \
94 ((val) == 255 ? 0 : \
95 1350000 / ((val) * (div))))
96
97/* for temp */
98#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \
99 : (val)) / 1000, 0, 0xff))
100#define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
101
102/* The analog voltage inputs have 8mV LSB. Since the sysfs output is
103 in mV as would be measured on the chip input pin, need to just
104 multiply/divide by 8 to translate from/to register values. */
105#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255))
106#define IN_FROM_REG(val) ((val) * 8)
107
108#define DIV_FROM_REG(val) (1 << (val))
109
110static inline u8
111DIV_TO_REG(long val)
112{
113 int i;
114 val = SENSORS_LIMIT(val, 1, 128) >> 1;
115 for (i = 0; i < 7; i++) {
116 if (val == 0)
117 break;
118 val >>= 1;
119 }
120 return ((u8) i);
121}
122
123struct w83l786ng_data {
124 struct i2c_client client;
125 struct device *hwmon_dev;
126 struct mutex update_lock;
127 char valid; /* !=0 if following fields are valid */
128 unsigned long last_updated; /* In jiffies */
129 unsigned long last_nonvolatile; /* In jiffies, last time we update the
130 nonvolatile registers */
131
132 u8 in[3];
133 u8 in_max[3];
134 u8 in_min[3];
135 u8 fan[2];
136 u8 fan_div[2];
137 u8 fan_min[2];
138 u8 temp_type[2];
139 u8 temp[2][3];
140 u8 pwm[2];
141 u8 pwm_mode[2]; /* 0->DC variable voltage
142 1->PWM variable duty cycle */
143
144 u8 pwm_enable[2]; /* 1->manual
145 2->thermal cruise (also called SmartFan I) */
146 u8 tolerance[2];
147};
148
149static int w83l786ng_attach_adapter(struct i2c_adapter *adapter);
150static int w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind);
151static int w83l786ng_detach_client(struct i2c_client *client);
152static void w83l786ng_init_client(struct i2c_client *client);
153static struct w83l786ng_data *w83l786ng_update_device(struct device *dev);
154
155static struct i2c_driver w83l786ng_driver = {
156 .driver = {
157 .name = "w83l786ng",
158 },
159 .attach_adapter = w83l786ng_attach_adapter,
160 .detach_client = w83l786ng_detach_client,
161};
162
163static u8
164w83l786ng_read_value(struct i2c_client *client, u8 reg)
165{
166 return i2c_smbus_read_byte_data(client, reg);
167}
168
169static int
170w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
171{
172 return i2c_smbus_write_byte_data(client, reg, value);
173}
174
175/* following are the sysfs callback functions */
176#define show_in_reg(reg) \
177static ssize_t \
178show_##reg(struct device *dev, struct device_attribute *attr, \
179 char *buf) \
180{ \
181 int nr = to_sensor_dev_attr(attr)->index; \
182 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
183 return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \
184}
185
186show_in_reg(in)
187show_in_reg(in_min)
188show_in_reg(in_max)
189
190#define store_in_reg(REG, reg) \
191static ssize_t \
192store_in_##reg (struct device *dev, struct device_attribute *attr, \
193 const char *buf, size_t count) \
194{ \
195 int nr = to_sensor_dev_attr(attr)->index; \
196 struct i2c_client *client = to_i2c_client(dev); \
197 struct w83l786ng_data *data = i2c_get_clientdata(client); \
198 unsigned long val = simple_strtoul(buf, NULL, 10); \
199 mutex_lock(&data->update_lock); \
200 data->in_##reg[nr] = IN_TO_REG(val); \
201 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
202 data->in_##reg[nr]); \
203 mutex_unlock(&data->update_lock); \
204 return count; \
205}
206
207store_in_reg(MIN, min)
208store_in_reg(MAX, max)
209
210static struct sensor_device_attribute sda_in_input[] = {
211 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
212 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
213 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
214};
215
216static struct sensor_device_attribute sda_in_min[] = {
217 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
218 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
219 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
220};
221
222static struct sensor_device_attribute sda_in_max[] = {
223 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
224 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
225 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
226};
227
228#define show_fan_reg(reg) \
229static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
230 char *buf) \
231{ \
232 int nr = to_sensor_dev_attr(attr)->index; \
233 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
234 return sprintf(buf,"%d\n", \
235 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \
236}
237
238show_fan_reg(fan);
239show_fan_reg(fan_min);
240
241static ssize_t
242store_fan_min(struct device *dev, struct device_attribute *attr,
243 const char *buf, size_t count)
244{
245 int nr = to_sensor_dev_attr(attr)->index;
246 struct i2c_client *client = to_i2c_client(dev);
247 struct w83l786ng_data *data = i2c_get_clientdata(client);
248 u32 val;
249
250 val = simple_strtoul(buf, NULL, 10);
251 mutex_lock(&data->update_lock);
252 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
253 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
254 data->fan_min[nr]);
255 mutex_unlock(&data->update_lock);
256
257 return count;
258}
259
260static ssize_t
261show_fan_div(struct device *dev, struct device_attribute *attr,
262 char *buf)
263{
264 int nr = to_sensor_dev_attr(attr)->index;
265 struct w83l786ng_data *data = w83l786ng_update_device(dev);
266 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
267}
268
269/* Note: we save and restore the fan minimum here, because its value is
270 determined in part by the fan divisor. This follows the principle of
271 least surprise; the user doesn't expect the fan minimum to change just
272 because the divisor changed. */
273static ssize_t
274store_fan_div(struct device *dev, struct device_attribute *attr,
275 const char *buf, size_t count)
276{
277 int nr = to_sensor_dev_attr(attr)->index;
278 struct i2c_client *client = to_i2c_client(dev);
279 struct w83l786ng_data *data = i2c_get_clientdata(client);
280
281 unsigned long min;
282 u8 tmp_fan_div;
283 u8 fan_div_reg;
284 u8 keep_mask = 0;
285 u8 new_shift = 0;
286
287 /* Save fan_min */
288 mutex_lock(&data->update_lock);
289 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
290
291 data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10));
292
293 switch (nr) {
294 case 0:
295 keep_mask = 0xf8;
296 new_shift = 0;
297 break;
298 case 1:
299 keep_mask = 0x8f;
300 new_shift = 4;
301 break;
302 }
303
304 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
305 & keep_mask;
306
307 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
308
309 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
310 fan_div_reg | tmp_fan_div);
311
312 /* Restore fan_min */
313 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
314 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
315 data->fan_min[nr]);
316 mutex_unlock(&data->update_lock);
317
318 return count;
319}
320
321static struct sensor_device_attribute sda_fan_input[] = {
322 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
323 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
324};
325
326static struct sensor_device_attribute sda_fan_min[] = {
327 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
328 store_fan_min, 0),
329 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
330 store_fan_min, 1),
331};
332
333static struct sensor_device_attribute sda_fan_div[] = {
334 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
335 store_fan_div, 0),
336 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
337 store_fan_div, 1),
338};
339
340
341/* read/write the temperature, includes measured value and limits */
342
343static ssize_t
344show_temp(struct device *dev, struct device_attribute *attr, char *buf)
345{
346 struct sensor_device_attribute_2 *sensor_attr =
347 to_sensor_dev_attr_2(attr);
348 int nr = sensor_attr->nr;
349 int index = sensor_attr->index;
350 struct w83l786ng_data *data = w83l786ng_update_device(dev);
351 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
352}
353
354static ssize_t
355store_temp(struct device *dev, struct device_attribute *attr,
356 const char *buf, size_t count)
357{
358 struct sensor_device_attribute_2 *sensor_attr =
359 to_sensor_dev_attr_2(attr);
360 int nr = sensor_attr->nr;
361 int index = sensor_attr->index;
362 struct i2c_client *client = to_i2c_client(dev);
363 struct w83l786ng_data *data = i2c_get_clientdata(client);
364 s32 val;
365
366 val = simple_strtol(buf, NULL, 10);
367 mutex_lock(&data->update_lock);
368 data->temp[nr][index] = TEMP_TO_REG(val);
369 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
370 data->temp[nr][index]);
371 mutex_unlock(&data->update_lock);
372
373 return count;
374}
375
376static struct sensor_device_attribute_2 sda_temp_input[] = {
377 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
378 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
379};
380
381static struct sensor_device_attribute_2 sda_temp_max[] = {
382 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
383 show_temp, store_temp, 0, 1),
384 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
385 show_temp, store_temp, 1, 1),
386};
387
388static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
389 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
390 show_temp, store_temp, 0, 2),
391 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
392 show_temp, store_temp, 1, 2),
393};
394
395#define show_pwm_reg(reg) \
396static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \
397 char *buf) \
398{ \
399 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
400 int nr = to_sensor_dev_attr(attr)->index; \
401 return sprintf(buf, "%d\n", data->reg[nr]); \
402}
403
404show_pwm_reg(pwm_mode)
405show_pwm_reg(pwm_enable)
406show_pwm_reg(pwm)
407
408static ssize_t
409store_pwm_mode(struct device *dev, struct device_attribute *attr,
410 const char *buf, size_t count)
411{
412 int nr = to_sensor_dev_attr(attr)->index;
413 struct i2c_client *client = to_i2c_client(dev);
414 struct w83l786ng_data *data = i2c_get_clientdata(client);
415 u32 val = simple_strtoul(buf, NULL, 10);
416 u8 reg;
417
418 if (val > 1)
419 return -EINVAL;
420 mutex_lock(&data->update_lock);
421 data->pwm_mode[nr] = val;
422 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
423 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
424 if (!val)
425 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
426 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
427 mutex_unlock(&data->update_lock);
428 return count;
429}
430
431static ssize_t
432store_pwm(struct device *dev, struct device_attribute *attr,
433 const char *buf, size_t count)
434{
435 int nr = to_sensor_dev_attr(attr)->index;
436 struct i2c_client *client = to_i2c_client(dev);
437 struct w83l786ng_data *data = i2c_get_clientdata(client);
438 u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255);
439
440 mutex_lock(&data->update_lock);
441 data->pwm[nr] = val;
442 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
443 mutex_unlock(&data->update_lock);
444 return count;
445}
446
447static ssize_t
448store_pwm_enable(struct device *dev, struct device_attribute *attr,
449 const char *buf, size_t count)
450{
451 int nr = to_sensor_dev_attr(attr)->index;
452 struct i2c_client *client = to_i2c_client(dev);
453 struct w83l786ng_data *data = i2c_get_clientdata(client);
454 u32 val = simple_strtoul(buf, NULL, 10);
455
456 u8 reg;
457
458 if (!val || (val > 2)) /* only modes 1 and 2 are supported */
459 return -EINVAL;
460
461 mutex_lock(&data->update_lock);
462 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
463 data->pwm_enable[nr] = val;
464 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
465 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
466 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
467 mutex_unlock(&data->update_lock);
468 return count;
469}
470
471static struct sensor_device_attribute sda_pwm[] = {
472 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
473 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
474};
475
476static struct sensor_device_attribute sda_pwm_mode[] = {
477 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
478 store_pwm_mode, 0),
479 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
480 store_pwm_mode, 1),
481};
482
483static struct sensor_device_attribute sda_pwm_enable[] = {
484 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
485 store_pwm_enable, 0),
486 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
487 store_pwm_enable, 1),
488};
489
490/* For Smart Fan I/Thermal Cruise and Smart Fan II */
491static ssize_t
492show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
493{
494 int nr = to_sensor_dev_attr(attr)->index;
495 struct w83l786ng_data *data = w83l786ng_update_device(dev);
496 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
497}
498
499static ssize_t
500store_tolerance(struct device *dev, struct device_attribute *attr,
501 const char *buf, size_t count)
502{
503 int nr = to_sensor_dev_attr(attr)->index;
504 struct i2c_client *client = to_i2c_client(dev);
505 struct w83l786ng_data *data = i2c_get_clientdata(client);
506 u32 val;
507 u8 tol_tmp, tol_mask;
508
509 val = simple_strtoul(buf, NULL, 10);
510
511 mutex_lock(&data->update_lock);
512 tol_mask = w83l786ng_read_value(client,
513 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
514 tol_tmp = SENSORS_LIMIT(val, 0, 15);
515 tol_tmp &= 0x0f;
516 data->tolerance[nr] = tol_tmp;
517 if (nr == 1) {
518 tol_tmp <<= 4;
519 }
520
521 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
522 tol_mask | tol_tmp);
523 mutex_unlock(&data->update_lock);
524 return count;
525}
526
527static struct sensor_device_attribute sda_tolerance[] = {
528 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
529 show_tolerance, store_tolerance, 0),
530 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
531 show_tolerance, store_tolerance, 1),
532};
533
534
535#define IN_UNIT_ATTRS(X) \
536 &sda_in_input[X].dev_attr.attr, \
537 &sda_in_min[X].dev_attr.attr, \
538 &sda_in_max[X].dev_attr.attr
539
540#define FAN_UNIT_ATTRS(X) \
541 &sda_fan_input[X].dev_attr.attr, \
542 &sda_fan_min[X].dev_attr.attr, \
543 &sda_fan_div[X].dev_attr.attr
544
545#define TEMP_UNIT_ATTRS(X) \
546 &sda_temp_input[X].dev_attr.attr, \
547 &sda_temp_max[X].dev_attr.attr, \
548 &sda_temp_max_hyst[X].dev_attr.attr
549
550#define PWM_UNIT_ATTRS(X) \
551 &sda_pwm[X].dev_attr.attr, \
552 &sda_pwm_mode[X].dev_attr.attr, \
553 &sda_pwm_enable[X].dev_attr.attr
554
555#define TOLERANCE_UNIT_ATTRS(X) \
556 &sda_tolerance[X].dev_attr.attr
557
558static struct attribute *w83l786ng_attributes[] = {
559 IN_UNIT_ATTRS(0),
560 IN_UNIT_ATTRS(1),
561 IN_UNIT_ATTRS(2),
562 FAN_UNIT_ATTRS(0),
563 FAN_UNIT_ATTRS(1),
564 TEMP_UNIT_ATTRS(0),
565 TEMP_UNIT_ATTRS(1),
566 PWM_UNIT_ATTRS(0),
567 PWM_UNIT_ATTRS(1),
568 TOLERANCE_UNIT_ATTRS(0),
569 TOLERANCE_UNIT_ATTRS(1),
570 NULL
571};
572
573static const struct attribute_group w83l786ng_group = {
574 .attrs = w83l786ng_attributes,
575};
576
577static int
578w83l786ng_attach_adapter(struct i2c_adapter *adapter)
579{
580 if (!(adapter->class & I2C_CLASS_HWMON))
581 return 0;
582 return i2c_probe(adapter, &addr_data, w83l786ng_detect);
583}
584
585static int
586w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind)
587{
588 struct i2c_client *client;
589 struct device *dev;
590 struct w83l786ng_data *data;
591 int i, err = 0;
592 u8 reg_tmp;
593
594 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
595 goto exit;
596 }
597
598 /* OK. For now, we presume we have a valid client. We now create the
599 client structure, even though we cannot fill it completely yet.
600 But it allows us to access w83l786ng_{read,write}_value. */
601
602 if (!(data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL))) {
603 err = -ENOMEM;
604 goto exit;
605 }
606
607 client = &data->client;
608 dev = &client->dev;
609 i2c_set_clientdata(client, data);
610 client->addr = address;
611 client->adapter = adapter;
612 client->driver = &w83l786ng_driver;
613
614 /*
615 * Now we do the remaining detection. A negative kind means that
616 * the driver was loaded with no force parameter (default), so we
617 * must both detect and identify the chip (actually there is only
618 * one possible kind of chip for now, W83L786NG). A zero kind means
619 * that the driver was loaded with the force parameter, the detection
620 * step shall be skipped. A positive kind means that the driver
621 * was loaded with the force parameter and a given kind of chip is
622 * requested, so both the detection and the identification steps
623 * are skipped.
624 */
625 if (kind < 0) { /* detection */
626 if (((w83l786ng_read_value(client,
627 W83L786NG_REG_CONFIG) & 0x80) != 0x00)) {
628 dev_dbg(&adapter->dev,
629 "W83L786NG detection failed at 0x%02x.\n",
630 address);
631 goto exit_free;
632 }
633 }
634
635 if (kind <= 0) { /* identification */
636 u16 man_id;
637 u8 chip_id;
638
639 man_id = (w83l786ng_read_value(client,
640 W83L786NG_REG_MAN_ID1) << 8) +
641 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
642 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
643
644 if (man_id == 0x5CA3) { /* Winbond */
645 if (chip_id == 0x80) { /* W83L786NG */
646 kind = w83l786ng;
647 }
648 }
649
650 if (kind <= 0) { /* identification failed */
651 dev_info(&adapter->dev,
652 "Unsupported chip (man_id=0x%04X, "
653 "chip_id=0x%02X).\n", man_id, chip_id);
654 goto exit_free;
655 }
656 }
657
658 /* Fill in the remaining client fields and put into the global list */
659 strlcpy(client->name, "w83l786ng", I2C_NAME_SIZE);
660 mutex_init(&data->update_lock);
661
662 /* Tell the I2C layer a new client has arrived */
663 if ((err = i2c_attach_client(client)))
664 goto exit_free;
665
666 /* Initialize the chip */
667 w83l786ng_init_client(client);
668
669 /* A few vars need to be filled upon startup */
670 for (i = 0; i < 2; i++) {
671 data->fan_min[i] = w83l786ng_read_value(client,
672 W83L786NG_REG_FAN_MIN(i));
673 }
674
675 /* Update the fan divisor */
676 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
677 data->fan_div[0] = reg_tmp & 0x07;
678 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
679
680 /* Register sysfs hooks */
681 if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group)))
682 goto exit_remove;
683
684 data->hwmon_dev = hwmon_device_register(dev);
685 if (IS_ERR(data->hwmon_dev)) {
686 err = PTR_ERR(data->hwmon_dev);
687 goto exit_remove;
688 }
689
690 return 0;
691
692 /* Unregister sysfs hooks */
693
694exit_remove:
695 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
696 i2c_detach_client(client);
697exit_free:
698 kfree(data);
699exit:
700 return err;
701}
702
703static int
704w83l786ng_detach_client(struct i2c_client *client)
705{
706 struct w83l786ng_data *data = i2c_get_clientdata(client);
707 int err;
708
709 hwmon_device_unregister(data->hwmon_dev);
710 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
711
712 if ((err = i2c_detach_client(client)))
713 return err;
714
715 kfree(data);
716
717 return 0;
718}
719
720static void
721w83l786ng_init_client(struct i2c_client *client)
722{
723 u8 tmp;
724
725 if (reset)
726 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
727
728 /* Start monitoring */
729 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
730 if (!(tmp & 0x01))
731 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
732}
733
734static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
735{
736 struct i2c_client *client = to_i2c_client(dev);
737 struct w83l786ng_data *data = i2c_get_clientdata(client);
738 int i, j;
739 u8 reg_tmp, pwmcfg;
740
741 mutex_lock(&data->update_lock);
742 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
743 || !data->valid) {
744 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
745
746 /* Update the voltages measured value and limits */
747 for (i = 0; i < 3; i++) {
748 data->in[i] = w83l786ng_read_value(client,
749 W83L786NG_REG_IN(i));
750 data->in_min[i] = w83l786ng_read_value(client,
751 W83L786NG_REG_IN_MIN(i));
752 data->in_max[i] = w83l786ng_read_value(client,
753 W83L786NG_REG_IN_MAX(i));
754 }
755
756 /* Update the fan counts and limits */
757 for (i = 0; i < 2; i++) {
758 data->fan[i] = w83l786ng_read_value(client,
759 W83L786NG_REG_FAN(i));
760 data->fan_min[i] = w83l786ng_read_value(client,
761 W83L786NG_REG_FAN_MIN(i));
762 }
763
764 /* Update the fan divisor */
765 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
766 data->fan_div[0] = reg_tmp & 0x07;
767 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
768
769 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
770 for (i = 0; i < 2; i++) {
771 data->pwm_mode[i] =
772 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
773 ? 0 : 1;
774 data->pwm_enable[i] =
775 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1;
776 data->pwm[i] = w83l786ng_read_value(client,
777 W83L786NG_REG_PWM[i]);
778 }
779
780
781 /* Update the temperature sensors */
782 for (i = 0; i < 2; i++) {
783 for (j = 0; j < 3; j++) {
784 data->temp[i][j] = w83l786ng_read_value(client,
785 W83L786NG_REG_TEMP[i][j]);
786 }
787 }
788
789 /* Update Smart Fan I/II tolerance */
790 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
791 data->tolerance[0] = reg_tmp & 0x0f;
792 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
793
794 data->last_updated = jiffies;
795 data->valid = 1;
796
797 }
798
799 mutex_unlock(&data->update_lock);
800
801 return data;
802}
803
804static int __init
805sensors_w83l786ng_init(void)
806{
807 return i2c_add_driver(&w83l786ng_driver);
808}
809
810static void __exit
811sensors_w83l786ng_exit(void)
812{
813 i2c_del_driver(&w83l786ng_driver);
814}
815
816MODULE_AUTHOR("Kevin Lo");
817MODULE_DESCRIPTION("w83l786ng driver");
818MODULE_LICENSE("GPL");
819
820module_init(sensors_w83l786ng_init);
821module_exit(sensors_w83l786ng_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-19 14:58:16 -0500