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#include <linux/jiffies.h>
37
38/* Addresses to scan */
39static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
40
41/* Insmod parameters */
42
43static bool 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 = clamp_val(rpm, 1, 1000000);
90 return clamp_val((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) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \
99 : (val)) / 1000, 0, 0xff))
100#define TEMP_FROM_REG(val) (((val) & 0x80 ? \
101 (val) - 0x100 : (val)) * 1000)
102
103/*
104 * The analog voltage inputs have 8mV LSB. Since the sysfs output is
105 * in mV as would be measured on the chip input pin, need to just
106 * multiply/divide by 8 to translate from/to register values.
107 */
108#define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255))
109#define IN_FROM_REG(val) ((val) * 8)
110
111#define DIV_FROM_REG(val) (1 << (val))
112
113static inline u8
114DIV_TO_REG(long val)
115{
116 int i;
117 val = clamp_val(val, 1, 128) >> 1;
118 for (i = 0; i < 7; i++) {
119 if (val == 0)
120 break;
121 val >>= 1;
122 }
123 return (u8)i;
124}
125
126struct w83l786ng_data {
127 struct i2c_client *client;
128 struct mutex update_lock;
129 char valid; /* !=0 if following fields are valid */
130 unsigned long last_updated; /* In jiffies */
131 unsigned long last_nonvolatile; /* In jiffies, last time we update the
132 * nonvolatile registers */
133
134 u8 in[3];
135 u8 in_max[3];
136 u8 in_min[3];
137 u8 fan[2];
138 u8 fan_div[2];
139 u8 fan_min[2];
140 u8 temp_type[2];
141 u8 temp[2][3];
142 u8 pwm[2];
143 u8 pwm_mode[2]; /* 0->DC variable voltage
144 * 1->PWM variable duty cycle */
145
146 u8 pwm_enable[2]; /* 1->manual
147 * 2->thermal cruise (also called SmartFan I) */
148 u8 tolerance[2];
149};
150
151static u8
152w83l786ng_read_value(struct i2c_client *client, u8 reg)
153{
154 return i2c_smbus_read_byte_data(client, reg);
155}
156
157static int
158w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
159{
160 return i2c_smbus_write_byte_data(client, reg, value);
161}
162
163static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
164{
165 struct w83l786ng_data *data = dev_get_drvdata(dev);
166 struct i2c_client *client = data->client;
167 int i, j;
168 u8 reg_tmp, pwmcfg;
169
170 mutex_lock(&data->update_lock);
171 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
172 || !data->valid) {
173 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
174
175 /* Update the voltages measured value and limits */
176 for (i = 0; i < 3; i++) {
177 data->in[i] = w83l786ng_read_value(client,
178 W83L786NG_REG_IN(i));
179 data->in_min[i] = w83l786ng_read_value(client,
180 W83L786NG_REG_IN_MIN(i));
181 data->in_max[i] = w83l786ng_read_value(client,
182 W83L786NG_REG_IN_MAX(i));
183 }
184
185 /* Update the fan counts and limits */
186 for (i = 0; i < 2; i++) {
187 data->fan[i] = w83l786ng_read_value(client,
188 W83L786NG_REG_FAN(i));
189 data->fan_min[i] = w83l786ng_read_value(client,
190 W83L786NG_REG_FAN_MIN(i));
191 }
192
193 /* Update the fan divisor */
194 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
195 data->fan_div[0] = reg_tmp & 0x07;
196 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
197
198 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
199 for (i = 0; i < 2; i++) {
200 data->pwm_mode[i] =
201 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
202 ? 0 : 1;
203 data->pwm_enable[i] =
204 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1;
205 data->pwm[i] =
206 (w83l786ng_read_value(client, W83L786NG_REG_PWM[i])
207 & 0x0f) * 0x11;
208 }
209
210
211 /* Update the temperature sensors */
212 for (i = 0; i < 2; i++) {
213 for (j = 0; j < 3; j++) {
214 data->temp[i][j] = w83l786ng_read_value(client,
215 W83L786NG_REG_TEMP[i][j]);
216 }
217 }
218
219 /* Update Smart Fan I/II tolerance */
220 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
221 data->tolerance[0] = reg_tmp & 0x0f;
222 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
223
224 data->last_updated = jiffies;
225 data->valid = 1;
226
227 }
228
229 mutex_unlock(&data->update_lock);
230
231 return data;
232}
233
234/* following are the sysfs callback functions */
235#define show_in_reg(reg) \
236static ssize_t \
237show_##reg(struct device *dev, struct device_attribute *attr, \
238 char *buf) \
239{ \
240 int nr = to_sensor_dev_attr(attr)->index; \
241 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
242 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
243}
244
245show_in_reg(in)
246show_in_reg(in_min)
247show_in_reg(in_max)
248
249#define store_in_reg(REG, reg) \
250static ssize_t \
251store_in_##reg(struct device *dev, struct device_attribute *attr, \
252 const char *buf, size_t count) \
253{ \
254 int nr = to_sensor_dev_attr(attr)->index; \
255 struct w83l786ng_data *data = dev_get_drvdata(dev); \
256 struct i2c_client *client = data->client; \
257 unsigned long val; \
258 int err = kstrtoul(buf, 10, &val); \
259 if (err) \
260 return err; \
261 mutex_lock(&data->update_lock); \
262 data->in_##reg[nr] = IN_TO_REG(val); \
263 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
264 data->in_##reg[nr]); \
265 mutex_unlock(&data->update_lock); \
266 return count; \
267}
268
269store_in_reg(MIN, min)
270store_in_reg(MAX, max)
271
272static struct sensor_device_attribute sda_in_input[] = {
273 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
274 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
275 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
276};
277
278static struct sensor_device_attribute sda_in_min[] = {
279 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
280 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
281 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
282};
283
284static struct sensor_device_attribute sda_in_max[] = {
285 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
286 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
287 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
288};
289
290#define show_fan_reg(reg) \
291static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
292 char *buf) \
293{ \
294 int nr = to_sensor_dev_attr(attr)->index; \
295 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
296 return sprintf(buf, "%d\n", \
297 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \
298}
299
300show_fan_reg(fan);
301show_fan_reg(fan_min);
302
303static ssize_t
304store_fan_min(struct device *dev, struct device_attribute *attr,
305 const char *buf, size_t count)
306{
307 int nr = to_sensor_dev_attr(attr)->index;
308 struct w83l786ng_data *data = dev_get_drvdata(dev);
309 struct i2c_client *client = data->client;
310 unsigned long val;
311 int err;
312
313 err = kstrtoul(buf, 10, &val);
314 if (err)
315 return err;
316
317 mutex_lock(&data->update_lock);
318 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
319 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
320 data->fan_min[nr]);
321 mutex_unlock(&data->update_lock);
322
323 return count;
324}
325
326static ssize_t
327show_fan_div(struct device *dev, struct device_attribute *attr,
328 char *buf)
329{
330 int nr = to_sensor_dev_attr(attr)->index;
331 struct w83l786ng_data *data = w83l786ng_update_device(dev);
332 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
333}
334
335/*
336 * Note: we save and restore the fan minimum here, because its value is
337 * determined in part by the fan divisor. This follows the principle of
338 * least surprise; the user doesn't expect the fan minimum to change just
339 * because the divisor changed.
340 */
341static ssize_t
342store_fan_div(struct device *dev, struct device_attribute *attr,
343 const char *buf, size_t count)
344{
345 int nr = to_sensor_dev_attr(attr)->index;
346 struct w83l786ng_data *data = dev_get_drvdata(dev);
347 struct i2c_client *client = data->client;
348
349 unsigned long min;
350 u8 tmp_fan_div;
351 u8 fan_div_reg;
352 u8 keep_mask = 0;
353 u8 new_shift = 0;
354
355 unsigned long val;
356 int err;
357
358 err = kstrtoul(buf, 10, &val);
359 if (err)
360 return err;
361
362 /* Save fan_min */
363 mutex_lock(&data->update_lock);
364 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
365
366 data->fan_div[nr] = DIV_TO_REG(val);
367
368 switch (nr) {
369 case 0:
370 keep_mask = 0xf8;
371 new_shift = 0;
372 break;
373 case 1:
374 keep_mask = 0x8f;
375 new_shift = 4;
376 break;
377 }
378
379 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
380 & keep_mask;
381
382 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
383
384 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
385 fan_div_reg | tmp_fan_div);
386
387 /* Restore fan_min */
388 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
389 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
390 data->fan_min[nr]);
391 mutex_unlock(&data->update_lock);
392
393 return count;
394}
395
396static struct sensor_device_attribute sda_fan_input[] = {
397 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
398 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
399};
400
401static struct sensor_device_attribute sda_fan_min[] = {
402 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
403 store_fan_min, 0),
404 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
405 store_fan_min, 1),
406};
407
408static struct sensor_device_attribute sda_fan_div[] = {
409 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
410 store_fan_div, 0),
411 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
412 store_fan_div, 1),
413};
414
415
416/* read/write the temperature, includes measured value and limits */
417
418static ssize_t
419show_temp(struct device *dev, struct device_attribute *attr, char *buf)
420{
421 struct sensor_device_attribute_2 *sensor_attr =
422 to_sensor_dev_attr_2(attr);
423 int nr = sensor_attr->nr;
424 int index = sensor_attr->index;
425 struct w83l786ng_data *data = w83l786ng_update_device(dev);
426 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
427}
428
429static ssize_t
430store_temp(struct device *dev, struct device_attribute *attr,
431 const char *buf, size_t count)
432{
433 struct sensor_device_attribute_2 *sensor_attr =
434 to_sensor_dev_attr_2(attr);
435 int nr = sensor_attr->nr;
436 int index = sensor_attr->index;
437 struct w83l786ng_data *data = dev_get_drvdata(dev);
438 struct i2c_client *client = data->client;
439 long val;
440 int err;
441
442 err = kstrtol(buf, 10, &val);
443 if (err)
444 return err;
445
446 mutex_lock(&data->update_lock);
447 data->temp[nr][index] = TEMP_TO_REG(val);
448 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
449 data->temp[nr][index]);
450 mutex_unlock(&data->update_lock);
451
452 return count;
453}
454
455static struct sensor_device_attribute_2 sda_temp_input[] = {
456 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
457 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
458};
459
460static struct sensor_device_attribute_2 sda_temp_max[] = {
461 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
462 show_temp, store_temp, 0, 1),
463 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
464 show_temp, store_temp, 1, 1),
465};
466
467static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
468 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
469 show_temp, store_temp, 0, 2),
470 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
471 show_temp, store_temp, 1, 2),
472};
473
474#define show_pwm_reg(reg) \
475static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
476 char *buf) \
477{ \
478 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
479 int nr = to_sensor_dev_attr(attr)->index; \
480 return sprintf(buf, "%d\n", data->reg[nr]); \
481}
482
483show_pwm_reg(pwm_mode)
484show_pwm_reg(pwm_enable)
485show_pwm_reg(pwm)
486
487static ssize_t
488store_pwm_mode(struct device *dev, struct device_attribute *attr,
489 const char *buf, size_t count)
490{
491 int nr = to_sensor_dev_attr(attr)->index;
492 struct w83l786ng_data *data = dev_get_drvdata(dev);
493 struct i2c_client *client = data->client;
494 u8 reg;
495 unsigned long val;
496 int err;
497
498 err = kstrtoul(buf, 10, &val);
499 if (err)
500 return err;
501
502 if (val > 1)
503 return -EINVAL;
504 mutex_lock(&data->update_lock);
505 data->pwm_mode[nr] = val;
506 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
507 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
508 if (!val)
509 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
510 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
511 mutex_unlock(&data->update_lock);
512 return count;
513}
514
515static ssize_t
516store_pwm(struct device *dev, struct device_attribute *attr,
517 const char *buf, size_t count)
518{
519 int nr = to_sensor_dev_attr(attr)->index;
520 struct w83l786ng_data *data = dev_get_drvdata(dev);
521 struct i2c_client *client = data->client;
522 unsigned long val;
523 int err;
524
525 err = kstrtoul(buf, 10, &val);
526 if (err)
527 return err;
528 val = clamp_val(val, 0, 255);
529 val = DIV_ROUND_CLOSEST(val, 0x11);
530
531 mutex_lock(&data->update_lock);
532 data->pwm[nr] = val * 0x11;
533 val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0;
534 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
535 mutex_unlock(&data->update_lock);
536 return count;
537}
538
539static ssize_t
540store_pwm_enable(struct device *dev, struct device_attribute *attr,
541 const char *buf, size_t count)
542{
543 int nr = to_sensor_dev_attr(attr)->index;
544 struct w83l786ng_data *data = dev_get_drvdata(dev);
545 struct i2c_client *client = data->client;
546 u8 reg;
547 unsigned long val;
548 int err;
549
550 err = kstrtoul(buf, 10, &val);
551 if (err)
552 return err;
553
554 if (!val || val > 2) /* only modes 1 and 2 are supported */
555 return -EINVAL;
556
557 mutex_lock(&data->update_lock);
558 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
559 data->pwm_enable[nr] = val;
560 reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
561 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
562 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
563 mutex_unlock(&data->update_lock);
564 return count;
565}
566
567static struct sensor_device_attribute sda_pwm[] = {
568 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
569 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
570};
571
572static struct sensor_device_attribute sda_pwm_mode[] = {
573 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
574 store_pwm_mode, 0),
575 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
576 store_pwm_mode, 1),
577};
578
579static struct sensor_device_attribute sda_pwm_enable[] = {
580 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
581 store_pwm_enable, 0),
582 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
583 store_pwm_enable, 1),
584};
585
586/* For Smart Fan I/Thermal Cruise and Smart Fan II */
587static ssize_t
588show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
589{
590 int nr = to_sensor_dev_attr(attr)->index;
591 struct w83l786ng_data *data = w83l786ng_update_device(dev);
592 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
593}
594
595static ssize_t
596store_tolerance(struct device *dev, struct device_attribute *attr,
597 const char *buf, size_t count)
598{
599 int nr = to_sensor_dev_attr(attr)->index;
600 struct w83l786ng_data *data = dev_get_drvdata(dev);
601 struct i2c_client *client = data->client;
602 u8 tol_tmp, tol_mask;
603 unsigned long val;
604 int err;
605
606 err = kstrtoul(buf, 10, &val);
607 if (err)
608 return err;
609
610 mutex_lock(&data->update_lock);
611 tol_mask = w83l786ng_read_value(client,
612 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
613 tol_tmp = clamp_val(val, 0, 15);
614 tol_tmp &= 0x0f;
615 data->tolerance[nr] = tol_tmp;
616 if (nr == 1)
617 tol_tmp <<= 4;
618
619 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
620 tol_mask | tol_tmp);
621 mutex_unlock(&data->update_lock);
622 return count;
623}
624
625static struct sensor_device_attribute sda_tolerance[] = {
626 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
627 show_tolerance, store_tolerance, 0),
628 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
629 show_tolerance, store_tolerance, 1),
630};
631
632
633#define IN_UNIT_ATTRS(X) \
634 &sda_in_input[X].dev_attr.attr, \
635 &sda_in_min[X].dev_attr.attr, \
636 &sda_in_max[X].dev_attr.attr
637
638#define FAN_UNIT_ATTRS(X) \
639 &sda_fan_input[X].dev_attr.attr, \
640 &sda_fan_min[X].dev_attr.attr, \
641 &sda_fan_div[X].dev_attr.attr
642
643#define TEMP_UNIT_ATTRS(X) \
644 &sda_temp_input[X].dev_attr.attr, \
645 &sda_temp_max[X].dev_attr.attr, \
646 &sda_temp_max_hyst[X].dev_attr.attr
647
648#define PWM_UNIT_ATTRS(X) \
649 &sda_pwm[X].dev_attr.attr, \
650 &sda_pwm_mode[X].dev_attr.attr, \
651 &sda_pwm_enable[X].dev_attr.attr
652
653#define TOLERANCE_UNIT_ATTRS(X) \
654 &sda_tolerance[X].dev_attr.attr
655
656static struct attribute *w83l786ng_attrs[] = {
657 IN_UNIT_ATTRS(0),
658 IN_UNIT_ATTRS(1),
659 IN_UNIT_ATTRS(2),
660 FAN_UNIT_ATTRS(0),
661 FAN_UNIT_ATTRS(1),
662 TEMP_UNIT_ATTRS(0),
663 TEMP_UNIT_ATTRS(1),
664 PWM_UNIT_ATTRS(0),
665 PWM_UNIT_ATTRS(1),
666 TOLERANCE_UNIT_ATTRS(0),
667 TOLERANCE_UNIT_ATTRS(1),
668 NULL
669};
670
671ATTRIBUTE_GROUPS(w83l786ng);
672
673static int
674w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info)
675{
676 struct i2c_adapter *adapter = client->adapter;
677 u16 man_id;
678 u8 chip_id;
679
680 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
681 return -ENODEV;
682
683 /* Detection */
684 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) {
685 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n",
686 client->addr);
687 return -ENODEV;
688 }
689
690 /* Identification */
691 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) +
692 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
693 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
694
695 if (man_id != 0x5CA3 || /* Winbond */
696 chip_id != 0x80) { /* W83L786NG */
697 dev_dbg(&adapter->dev,
698 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
699 man_id, chip_id);
700 return -ENODEV;
701 }
702
703 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
704
705 return 0;
706}
707
708static void w83l786ng_init_client(struct i2c_client *client)
709{
710 u8 tmp;
711
712 if (reset)
713 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
714
715 /* Start monitoring */
716 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
717 if (!(tmp & 0x01))
718 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
719}
720
721static int
722w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
723{
724 struct device *dev = &client->dev;
725 struct w83l786ng_data *data;
726 struct device *hwmon_dev;
727 int i;
728 u8 reg_tmp;
729
730 data = devm_kzalloc(dev, sizeof(struct w83l786ng_data), GFP_KERNEL);
731 if (!data)
732 return -ENOMEM;
733
734 data->client = client;
735 mutex_init(&data->update_lock);
736
737 /* Initialize the chip */
738 w83l786ng_init_client(client);
739
740 /* A few vars need to be filled upon startup */
741 for (i = 0; i < 2; i++) {
742 data->fan_min[i] = w83l786ng_read_value(client,
743 W83L786NG_REG_FAN_MIN(i));
744 }
745
746 /* Update the fan divisor */
747 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
748 data->fan_div[0] = reg_tmp & 0x07;
749 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
750
751 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
752 data,
753 w83l786ng_groups);
754 return PTR_ERR_OR_ZERO(hwmon_dev);
755}
756
757static const struct i2c_device_id w83l786ng_id[] = {
758 { "w83l786ng", 0 },
759 { }
760};
761MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
762
763static struct i2c_driver w83l786ng_driver = {
764 .class = I2C_CLASS_HWMON,
765 .driver = {
766 .name = "w83l786ng",
767 },
768 .probe = w83l786ng_probe,
769 .id_table = w83l786ng_id,
770 .detect = w83l786ng_detect,
771 .address_list = normal_i2c,
772};
773
774module_i2c_driver(w83l786ng_driver);
775
776MODULE_AUTHOR("Kevin Lo");
777MODULE_DESCRIPTION("w83l786ng driver");
778MODULE_LICENSE("GPL");
779