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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * w83l786ng.c - Linux kernel driver for hardware monitoring
4 * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org>
5 */
6
7/*
8 * Supports following chips:
9 *
10 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
11 * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/slab.h>
17#include <linux/i2c.h>
18#include <linux/hwmon.h>
19#include <linux/hwmon-sysfs.h>
20#include <linux/err.h>
21#include <linux/mutex.h>
22#include <linux/jiffies.h>
23
24/* Addresses to scan */
25static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
26
27/* Insmod parameters */
28
29static bool reset;
30module_param(reset, bool, 0);
31MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
32
33#define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2)
34#define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2)
35#define W83L786NG_REG_IN(nr) ((nr) + 0x20)
36
37#define W83L786NG_REG_FAN(nr) ((nr) + 0x28)
38#define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B)
39
40#define W83L786NG_REG_CONFIG 0x40
41#define W83L786NG_REG_ALARM1 0x41
42#define W83L786NG_REG_ALARM2 0x42
43#define W83L786NG_REG_GPIO_EN 0x47
44#define W83L786NG_REG_MAN_ID2 0x4C
45#define W83L786NG_REG_MAN_ID1 0x4D
46#define W83L786NG_REG_CHIP_ID 0x4E
47
48#define W83L786NG_REG_DIODE 0x53
49#define W83L786NG_REG_FAN_DIV 0x54
50#define W83L786NG_REG_FAN_CFG 0x80
51
52#define W83L786NG_REG_TOLERANCE 0x8D
53
54static const u8 W83L786NG_REG_TEMP[2][3] = {
55 { 0x25, /* TEMP 0 in DataSheet */
56 0x35, /* TEMP 0 Over in DataSheet */
57 0x36 }, /* TEMP 0 Hyst in DataSheet */
58 { 0x26, /* TEMP 1 in DataSheet */
59 0x37, /* TEMP 1 Over in DataSheet */
60 0x38 } /* TEMP 1 Hyst in DataSheet */
61};
62
63static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
64static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
65
66/* FAN Duty Cycle, be used to control */
67static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
68
69
70static inline u8
71FAN_TO_REG(long rpm, int div)
72{
73 if (rpm == 0)
74 return 255;
75 rpm = clamp_val(rpm, 1, 1000000);
76 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
77}
78
79#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
80 ((val) == 255 ? 0 : \
81 1350000 / ((val) * (div))))
82
83/* for temp */
84#define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \
85 : (val)) / 1000, 0, 0xff))
86#define TEMP_FROM_REG(val) (((val) & 0x80 ? \
87 (val) - 0x100 : (val)) * 1000)
88
89/*
90 * The analog voltage inputs have 8mV LSB. Since the sysfs output is
91 * in mV as would be measured on the chip input pin, need to just
92 * multiply/divide by 8 to translate from/to register values.
93 */
94#define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255))
95#define IN_FROM_REG(val) ((val) * 8)
96
97#define DIV_FROM_REG(val) (1 << (val))
98
99static inline u8
100DIV_TO_REG(long val)
101{
102 int i;
103 val = clamp_val(val, 1, 128) >> 1;
104 for (i = 0; i < 7; i++) {
105 if (val == 0)
106 break;
107 val >>= 1;
108 }
109 return (u8)i;
110}
111
112struct w83l786ng_data {
113 struct i2c_client *client;
114 struct mutex update_lock;
115 bool valid; /* true if following fields are valid */
116 unsigned long last_updated; /* In jiffies */
117 unsigned long last_nonvolatile; /* In jiffies, last time we update the
118 * nonvolatile registers */
119
120 u8 in[3];
121 u8 in_max[3];
122 u8 in_min[3];
123 u8 fan[2];
124 u8 fan_div[2];
125 u8 fan_min[2];
126 u8 temp_type[2];
127 u8 temp[2][3];
128 u8 pwm[2];
129 u8 pwm_mode[2]; /* 0->DC variable voltage
130 * 1->PWM variable duty cycle */
131
132 u8 pwm_enable[2]; /* 1->manual
133 * 2->thermal cruise (also called SmartFan I) */
134 u8 tolerance[2];
135};
136
137static u8
138w83l786ng_read_value(struct i2c_client *client, u8 reg)
139{
140 return i2c_smbus_read_byte_data(client, reg);
141}
142
143static int
144w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
145{
146 return i2c_smbus_write_byte_data(client, reg, value);
147}
148
149static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
150{
151 struct w83l786ng_data *data = dev_get_drvdata(dev);
152 struct i2c_client *client = data->client;
153 int i, j;
154 u8 reg_tmp, pwmcfg;
155
156 mutex_lock(&data->update_lock);
157 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
158 || !data->valid) {
159 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
160
161 /* Update the voltages measured value and limits */
162 for (i = 0; i < 3; i++) {
163 data->in[i] = w83l786ng_read_value(client,
164 W83L786NG_REG_IN(i));
165 data->in_min[i] = w83l786ng_read_value(client,
166 W83L786NG_REG_IN_MIN(i));
167 data->in_max[i] = w83l786ng_read_value(client,
168 W83L786NG_REG_IN_MAX(i));
169 }
170
171 /* Update the fan counts and limits */
172 for (i = 0; i < 2; i++) {
173 data->fan[i] = w83l786ng_read_value(client,
174 W83L786NG_REG_FAN(i));
175 data->fan_min[i] = w83l786ng_read_value(client,
176 W83L786NG_REG_FAN_MIN(i));
177 }
178
179 /* Update the fan divisor */
180 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
181 data->fan_div[0] = reg_tmp & 0x07;
182 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
183
184 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
185 for (i = 0; i < 2; i++) {
186 data->pwm_mode[i] =
187 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
188 ? 0 : 1;
189 data->pwm_enable[i] =
190 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1;
191 data->pwm[i] =
192 (w83l786ng_read_value(client, W83L786NG_REG_PWM[i])
193 & 0x0f) * 0x11;
194 }
195
196
197 /* Update the temperature sensors */
198 for (i = 0; i < 2; i++) {
199 for (j = 0; j < 3; j++) {
200 data->temp[i][j] = w83l786ng_read_value(client,
201 W83L786NG_REG_TEMP[i][j]);
202 }
203 }
204
205 /* Update Smart Fan I/II tolerance */
206 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
207 data->tolerance[0] = reg_tmp & 0x0f;
208 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
209
210 data->last_updated = jiffies;
211 data->valid = true;
212
213 }
214
215 mutex_unlock(&data->update_lock);
216
217 return data;
218}
219
220/* following are the sysfs callback functions */
221#define show_in_reg(reg) \
222static ssize_t \
223show_##reg(struct device *dev, struct device_attribute *attr, \
224 char *buf) \
225{ \
226 int nr = to_sensor_dev_attr(attr)->index; \
227 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
228 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
229}
230
231show_in_reg(in)
232show_in_reg(in_min)
233show_in_reg(in_max)
234
235#define store_in_reg(REG, reg) \
236static ssize_t \
237store_in_##reg(struct device *dev, struct device_attribute *attr, \
238 const char *buf, size_t count) \
239{ \
240 int nr = to_sensor_dev_attr(attr)->index; \
241 struct w83l786ng_data *data = dev_get_drvdata(dev); \
242 struct i2c_client *client = data->client; \
243 unsigned long val; \
244 int err = kstrtoul(buf, 10, &val); \
245 if (err) \
246 return err; \
247 mutex_lock(&data->update_lock); \
248 data->in_##reg[nr] = IN_TO_REG(val); \
249 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
250 data->in_##reg[nr]); \
251 mutex_unlock(&data->update_lock); \
252 return count; \
253}
254
255store_in_reg(MIN, min)
256store_in_reg(MAX, max)
257
258static struct sensor_device_attribute sda_in_input[] = {
259 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
260 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
261 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
262};
263
264static struct sensor_device_attribute sda_in_min[] = {
265 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
266 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
267 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
268};
269
270static struct sensor_device_attribute sda_in_max[] = {
271 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
272 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
273 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
274};
275
276#define show_fan_reg(reg) \
277static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
278 char *buf) \
279{ \
280 int nr = to_sensor_dev_attr(attr)->index; \
281 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
282 return sprintf(buf, "%d\n", \
283 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \
284}
285
286show_fan_reg(fan);
287show_fan_reg(fan_min);
288
289static ssize_t
290store_fan_min(struct device *dev, struct device_attribute *attr,
291 const char *buf, size_t count)
292{
293 int nr = to_sensor_dev_attr(attr)->index;
294 struct w83l786ng_data *data = dev_get_drvdata(dev);
295 struct i2c_client *client = data->client;
296 unsigned long val;
297 int err;
298
299 err = kstrtoul(buf, 10, &val);
300 if (err)
301 return err;
302
303 mutex_lock(&data->update_lock);
304 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
305 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
306 data->fan_min[nr]);
307 mutex_unlock(&data->update_lock);
308
309 return count;
310}
311
312static ssize_t
313show_fan_div(struct device *dev, struct device_attribute *attr,
314 char *buf)
315{
316 int nr = to_sensor_dev_attr(attr)->index;
317 struct w83l786ng_data *data = w83l786ng_update_device(dev);
318 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
319}
320
321/*
322 * Note: we save and restore the fan minimum here, because its value is
323 * determined in part by the fan divisor. This follows the principle of
324 * least surprise; the user doesn't expect the fan minimum to change just
325 * because the divisor changed.
326 */
327static ssize_t
328store_fan_div(struct device *dev, struct device_attribute *attr,
329 const char *buf, size_t count)
330{
331 int nr = to_sensor_dev_attr(attr)->index;
332 struct w83l786ng_data *data = dev_get_drvdata(dev);
333 struct i2c_client *client = data->client;
334
335 unsigned long min;
336 u8 tmp_fan_div;
337 u8 fan_div_reg;
338 u8 keep_mask = 0;
339 u8 new_shift = 0;
340
341 unsigned long val;
342 int err;
343
344 err = kstrtoul(buf, 10, &val);
345 if (err)
346 return err;
347
348 /* Save fan_min */
349 mutex_lock(&data->update_lock);
350 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
351
352 data->fan_div[nr] = DIV_TO_REG(val);
353
354 switch (nr) {
355 case 0:
356 keep_mask = 0xf8;
357 new_shift = 0;
358 break;
359 case 1:
360 keep_mask = 0x8f;
361 new_shift = 4;
362 break;
363 }
364
365 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
366 & keep_mask;
367
368 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
369
370 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
371 fan_div_reg | tmp_fan_div);
372
373 /* Restore fan_min */
374 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
375 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
376 data->fan_min[nr]);
377 mutex_unlock(&data->update_lock);
378
379 return count;
380}
381
382static struct sensor_device_attribute sda_fan_input[] = {
383 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
384 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
385};
386
387static struct sensor_device_attribute sda_fan_min[] = {
388 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
389 store_fan_min, 0),
390 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
391 store_fan_min, 1),
392};
393
394static struct sensor_device_attribute sda_fan_div[] = {
395 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
396 store_fan_div, 0),
397 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
398 store_fan_div, 1),
399};
400
401
402/* read/write the temperature, includes measured value and limits */
403
404static ssize_t
405show_temp(struct device *dev, struct device_attribute *attr, char *buf)
406{
407 struct sensor_device_attribute_2 *sensor_attr =
408 to_sensor_dev_attr_2(attr);
409 int nr = sensor_attr->nr;
410 int index = sensor_attr->index;
411 struct w83l786ng_data *data = w83l786ng_update_device(dev);
412 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
413}
414
415static ssize_t
416store_temp(struct device *dev, struct device_attribute *attr,
417 const char *buf, size_t count)
418{
419 struct sensor_device_attribute_2 *sensor_attr =
420 to_sensor_dev_attr_2(attr);
421 int nr = sensor_attr->nr;
422 int index = sensor_attr->index;
423 struct w83l786ng_data *data = dev_get_drvdata(dev);
424 struct i2c_client *client = data->client;
425 long val;
426 int err;
427
428 err = kstrtol(buf, 10, &val);
429 if (err)
430 return err;
431
432 mutex_lock(&data->update_lock);
433 data->temp[nr][index] = TEMP_TO_REG(val);
434 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
435 data->temp[nr][index]);
436 mutex_unlock(&data->update_lock);
437
438 return count;
439}
440
441static struct sensor_device_attribute_2 sda_temp_input[] = {
442 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
443 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
444};
445
446static struct sensor_device_attribute_2 sda_temp_max[] = {
447 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
448 show_temp, store_temp, 0, 1),
449 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
450 show_temp, store_temp, 1, 1),
451};
452
453static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
454 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
455 show_temp, store_temp, 0, 2),
456 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
457 show_temp, store_temp, 1, 2),
458};
459
460#define show_pwm_reg(reg) \
461static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
462 char *buf) \
463{ \
464 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
465 int nr = to_sensor_dev_attr(attr)->index; \
466 return sprintf(buf, "%d\n", data->reg[nr]); \
467}
468
469show_pwm_reg(pwm_mode)
470show_pwm_reg(pwm_enable)
471show_pwm_reg(pwm)
472
473static ssize_t
474store_pwm_mode(struct device *dev, struct device_attribute *attr,
475 const char *buf, size_t count)
476{
477 int nr = to_sensor_dev_attr(attr)->index;
478 struct w83l786ng_data *data = dev_get_drvdata(dev);
479 struct i2c_client *client = data->client;
480 u8 reg;
481 unsigned long val;
482 int err;
483
484 err = kstrtoul(buf, 10, &val);
485 if (err)
486 return err;
487
488 if (val > 1)
489 return -EINVAL;
490 mutex_lock(&data->update_lock);
491 data->pwm_mode[nr] = val;
492 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
493 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
494 if (!val)
495 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
496 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
497 mutex_unlock(&data->update_lock);
498 return count;
499}
500
501static ssize_t
502store_pwm(struct device *dev, struct device_attribute *attr,
503 const char *buf, size_t count)
504{
505 int nr = to_sensor_dev_attr(attr)->index;
506 struct w83l786ng_data *data = dev_get_drvdata(dev);
507 struct i2c_client *client = data->client;
508 unsigned long val;
509 int err;
510
511 err = kstrtoul(buf, 10, &val);
512 if (err)
513 return err;
514 val = clamp_val(val, 0, 255);
515 val = DIV_ROUND_CLOSEST(val, 0x11);
516
517 mutex_lock(&data->update_lock);
518 data->pwm[nr] = val * 0x11;
519 val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0;
520 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
521 mutex_unlock(&data->update_lock);
522 return count;
523}
524
525static ssize_t
526store_pwm_enable(struct device *dev, struct device_attribute *attr,
527 const char *buf, size_t count)
528{
529 int nr = to_sensor_dev_attr(attr)->index;
530 struct w83l786ng_data *data = dev_get_drvdata(dev);
531 struct i2c_client *client = data->client;
532 u8 reg;
533 unsigned long val;
534 int err;
535
536 err = kstrtoul(buf, 10, &val);
537 if (err)
538 return err;
539
540 if (!val || val > 2) /* only modes 1 and 2 are supported */
541 return -EINVAL;
542
543 mutex_lock(&data->update_lock);
544 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
545 data->pwm_enable[nr] = val;
546 reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
547 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
548 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
549 mutex_unlock(&data->update_lock);
550 return count;
551}
552
553static struct sensor_device_attribute sda_pwm[] = {
554 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
555 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
556};
557
558static struct sensor_device_attribute sda_pwm_mode[] = {
559 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
560 store_pwm_mode, 0),
561 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
562 store_pwm_mode, 1),
563};
564
565static struct sensor_device_attribute sda_pwm_enable[] = {
566 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
567 store_pwm_enable, 0),
568 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
569 store_pwm_enable, 1),
570};
571
572/* For Smart Fan I/Thermal Cruise and Smart Fan II */
573static ssize_t
574show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
575{
576 int nr = to_sensor_dev_attr(attr)->index;
577 struct w83l786ng_data *data = w83l786ng_update_device(dev);
578 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
579}
580
581static ssize_t
582store_tolerance(struct device *dev, struct device_attribute *attr,
583 const char *buf, size_t count)
584{
585 int nr = to_sensor_dev_attr(attr)->index;
586 struct w83l786ng_data *data = dev_get_drvdata(dev);
587 struct i2c_client *client = data->client;
588 u8 tol_tmp, tol_mask;
589 unsigned long val;
590 int err;
591
592 err = kstrtoul(buf, 10, &val);
593 if (err)
594 return err;
595
596 mutex_lock(&data->update_lock);
597 tol_mask = w83l786ng_read_value(client,
598 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
599 tol_tmp = clamp_val(val, 0, 15);
600 tol_tmp &= 0x0f;
601 data->tolerance[nr] = tol_tmp;
602 if (nr == 1)
603 tol_tmp <<= 4;
604
605 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
606 tol_mask | tol_tmp);
607 mutex_unlock(&data->update_lock);
608 return count;
609}
610
611static struct sensor_device_attribute sda_tolerance[] = {
612 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
613 show_tolerance, store_tolerance, 0),
614 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
615 show_tolerance, store_tolerance, 1),
616};
617
618
619#define IN_UNIT_ATTRS(X) \
620 &sda_in_input[X].dev_attr.attr, \
621 &sda_in_min[X].dev_attr.attr, \
622 &sda_in_max[X].dev_attr.attr
623
624#define FAN_UNIT_ATTRS(X) \
625 &sda_fan_input[X].dev_attr.attr, \
626 &sda_fan_min[X].dev_attr.attr, \
627 &sda_fan_div[X].dev_attr.attr
628
629#define TEMP_UNIT_ATTRS(X) \
630 &sda_temp_input[X].dev_attr.attr, \
631 &sda_temp_max[X].dev_attr.attr, \
632 &sda_temp_max_hyst[X].dev_attr.attr
633
634#define PWM_UNIT_ATTRS(X) \
635 &sda_pwm[X].dev_attr.attr, \
636 &sda_pwm_mode[X].dev_attr.attr, \
637 &sda_pwm_enable[X].dev_attr.attr
638
639#define TOLERANCE_UNIT_ATTRS(X) \
640 &sda_tolerance[X].dev_attr.attr
641
642static struct attribute *w83l786ng_attrs[] = {
643 IN_UNIT_ATTRS(0),
644 IN_UNIT_ATTRS(1),
645 IN_UNIT_ATTRS(2),
646 FAN_UNIT_ATTRS(0),
647 FAN_UNIT_ATTRS(1),
648 TEMP_UNIT_ATTRS(0),
649 TEMP_UNIT_ATTRS(1),
650 PWM_UNIT_ATTRS(0),
651 PWM_UNIT_ATTRS(1),
652 TOLERANCE_UNIT_ATTRS(0),
653 TOLERANCE_UNIT_ATTRS(1),
654 NULL
655};
656
657ATTRIBUTE_GROUPS(w83l786ng);
658
659static int
660w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info)
661{
662 struct i2c_adapter *adapter = client->adapter;
663 u16 man_id;
664 u8 chip_id;
665
666 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
667 return -ENODEV;
668
669 /* Detection */
670 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) {
671 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n",
672 client->addr);
673 return -ENODEV;
674 }
675
676 /* Identification */
677 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) +
678 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
679 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
680
681 if (man_id != 0x5CA3 || /* Winbond */
682 chip_id != 0x80) { /* W83L786NG */
683 dev_dbg(&adapter->dev,
684 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
685 man_id, chip_id);
686 return -ENODEV;
687 }
688
689 strscpy(info->type, "w83l786ng", I2C_NAME_SIZE);
690
691 return 0;
692}
693
694static void w83l786ng_init_client(struct i2c_client *client)
695{
696 u8 tmp;
697
698 if (reset)
699 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
700
701 /* Start monitoring */
702 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
703 if (!(tmp & 0x01))
704 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
705}
706
707static int
708w83l786ng_probe(struct i2c_client *client)
709{
710 struct device *dev = &client->dev;
711 struct w83l786ng_data *data;
712 struct device *hwmon_dev;
713 int i;
714 u8 reg_tmp;
715
716 data = devm_kzalloc(dev, sizeof(struct w83l786ng_data), GFP_KERNEL);
717 if (!data)
718 return -ENOMEM;
719
720 data->client = client;
721 mutex_init(&data->update_lock);
722
723 /* Initialize the chip */
724 w83l786ng_init_client(client);
725
726 /* A few vars need to be filled upon startup */
727 for (i = 0; i < 2; i++) {
728 data->fan_min[i] = w83l786ng_read_value(client,
729 W83L786NG_REG_FAN_MIN(i));
730 }
731
732 /* Update the fan divisor */
733 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
734 data->fan_div[0] = reg_tmp & 0x07;
735 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
736
737 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
738 data,
739 w83l786ng_groups);
740 return PTR_ERR_OR_ZERO(hwmon_dev);
741}
742
743static const struct i2c_device_id w83l786ng_id[] = {
744 { "w83l786ng" },
745 { }
746};
747MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
748
749static struct i2c_driver w83l786ng_driver = {
750 .class = I2C_CLASS_HWMON,
751 .driver = {
752 .name = "w83l786ng",
753 },
754 .probe = w83l786ng_probe,
755 .id_table = w83l786ng_id,
756 .detect = w83l786ng_detect,
757 .address_list = normal_i2c,
758};
759
760module_i2c_driver(w83l786ng_driver);
761
762MODULE_AUTHOR("Kevin Lo");
763MODULE_DESCRIPTION("w83l786ng driver");
764MODULE_LICENSE("GPL");
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 const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
39
40/* Insmod parameters */
41
42static int reset;
43module_param(reset, bool, 0);
44MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
45
46#define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2)
47#define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2)
48#define W83L786NG_REG_IN(nr) ((nr) + 0x20)
49
50#define W83L786NG_REG_FAN(nr) ((nr) + 0x28)
51#define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B)
52
53#define W83L786NG_REG_CONFIG 0x40
54#define W83L786NG_REG_ALARM1 0x41
55#define W83L786NG_REG_ALARM2 0x42
56#define W83L786NG_REG_GPIO_EN 0x47
57#define W83L786NG_REG_MAN_ID2 0x4C
58#define W83L786NG_REG_MAN_ID1 0x4D
59#define W83L786NG_REG_CHIP_ID 0x4E
60
61#define W83L786NG_REG_DIODE 0x53
62#define W83L786NG_REG_FAN_DIV 0x54
63#define W83L786NG_REG_FAN_CFG 0x80
64
65#define W83L786NG_REG_TOLERANCE 0x8D
66
67static const u8 W83L786NG_REG_TEMP[2][3] = {
68 { 0x25, /* TEMP 0 in DataSheet */
69 0x35, /* TEMP 0 Over in DataSheet */
70 0x36 }, /* TEMP 0 Hyst in DataSheet */
71 { 0x26, /* TEMP 1 in DataSheet */
72 0x37, /* TEMP 1 Over in DataSheet */
73 0x38 } /* TEMP 1 Hyst in DataSheet */
74};
75
76static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
77static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
78
79/* FAN Duty Cycle, be used to control */
80static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
81
82
83static inline u8
84FAN_TO_REG(long rpm, int div)
85{
86 if (rpm == 0)
87 return 255;
88 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
89 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
90}
91
92#define FAN_FROM_REG(val,div) ((val) == 0 ? -1 : \
93 ((val) == 255 ? 0 : \
94 1350000 / ((val) * (div))))
95
96/* for temp */
97#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \
98 : (val)) / 1000, 0, 0xff))
99#define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
100
101/* The analog voltage inputs have 8mV LSB. Since the sysfs output is
102 in mV as would be measured on the chip input pin, need to just
103 multiply/divide by 8 to translate from/to register values. */
104#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255))
105#define IN_FROM_REG(val) ((val) * 8)
106
107#define DIV_FROM_REG(val) (1 << (val))
108
109static inline u8
110DIV_TO_REG(long val)
111{
112 int i;
113 val = SENSORS_LIMIT(val, 1, 128) >> 1;
114 for (i = 0; i < 7; i++) {
115 if (val == 0)
116 break;
117 val >>= 1;
118 }
119 return ((u8) i);
120}
121
122struct w83l786ng_data {
123 struct device *hwmon_dev;
124 struct mutex update_lock;
125 char valid; /* !=0 if following fields are valid */
126 unsigned long last_updated; /* In jiffies */
127 unsigned long last_nonvolatile; /* In jiffies, last time we update the
128 nonvolatile registers */
129
130 u8 in[3];
131 u8 in_max[3];
132 u8 in_min[3];
133 u8 fan[2];
134 u8 fan_div[2];
135 u8 fan_min[2];
136 u8 temp_type[2];
137 u8 temp[2][3];
138 u8 pwm[2];
139 u8 pwm_mode[2]; /* 0->DC variable voltage
140 1->PWM variable duty cycle */
141
142 u8 pwm_enable[2]; /* 1->manual
143 2->thermal cruise (also called SmartFan I) */
144 u8 tolerance[2];
145};
146
147static int w83l786ng_probe(struct i2c_client *client,
148 const struct i2c_device_id *id);
149static int w83l786ng_detect(struct i2c_client *client,
150 struct i2c_board_info *info);
151static int w83l786ng_remove(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 const struct i2c_device_id w83l786ng_id[] = {
156 { "w83l786ng", 0 },
157 { }
158};
159MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
160
161static struct i2c_driver w83l786ng_driver = {
162 .class = I2C_CLASS_HWMON,
163 .driver = {
164 .name = "w83l786ng",
165 },
166 .probe = w83l786ng_probe,
167 .remove = w83l786ng_remove,
168 .id_table = w83l786ng_id,
169 .detect = w83l786ng_detect,
170 .address_list = normal_i2c,
171};
172
173static u8
174w83l786ng_read_value(struct i2c_client *client, u8 reg)
175{
176 return i2c_smbus_read_byte_data(client, reg);
177}
178
179static int
180w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
181{
182 return i2c_smbus_write_byte_data(client, reg, value);
183}
184
185/* following are the sysfs callback functions */
186#define show_in_reg(reg) \
187static ssize_t \
188show_##reg(struct device *dev, struct device_attribute *attr, \
189 char *buf) \
190{ \
191 int nr = to_sensor_dev_attr(attr)->index; \
192 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
193 return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \
194}
195
196show_in_reg(in)
197show_in_reg(in_min)
198show_in_reg(in_max)
199
200#define store_in_reg(REG, reg) \
201static ssize_t \
202store_in_##reg (struct device *dev, struct device_attribute *attr, \
203 const char *buf, size_t count) \
204{ \
205 int nr = to_sensor_dev_attr(attr)->index; \
206 struct i2c_client *client = to_i2c_client(dev); \
207 struct w83l786ng_data *data = i2c_get_clientdata(client); \
208 unsigned long val = simple_strtoul(buf, NULL, 10); \
209 mutex_lock(&data->update_lock); \
210 data->in_##reg[nr] = IN_TO_REG(val); \
211 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
212 data->in_##reg[nr]); \
213 mutex_unlock(&data->update_lock); \
214 return count; \
215}
216
217store_in_reg(MIN, min)
218store_in_reg(MAX, max)
219
220static struct sensor_device_attribute sda_in_input[] = {
221 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
222 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
223 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
224};
225
226static struct sensor_device_attribute sda_in_min[] = {
227 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
228 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
229 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
230};
231
232static struct sensor_device_attribute sda_in_max[] = {
233 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
234 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
235 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
236};
237
238#define show_fan_reg(reg) \
239static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
240 char *buf) \
241{ \
242 int nr = to_sensor_dev_attr(attr)->index; \
243 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
244 return sprintf(buf,"%d\n", \
245 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \
246}
247
248show_fan_reg(fan);
249show_fan_reg(fan_min);
250
251static ssize_t
252store_fan_min(struct device *dev, struct device_attribute *attr,
253 const char *buf, size_t count)
254{
255 int nr = to_sensor_dev_attr(attr)->index;
256 struct i2c_client *client = to_i2c_client(dev);
257 struct w83l786ng_data *data = i2c_get_clientdata(client);
258 u32 val;
259
260 val = simple_strtoul(buf, NULL, 10);
261 mutex_lock(&data->update_lock);
262 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
263 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
264 data->fan_min[nr]);
265 mutex_unlock(&data->update_lock);
266
267 return count;
268}
269
270static ssize_t
271show_fan_div(struct device *dev, struct device_attribute *attr,
272 char *buf)
273{
274 int nr = to_sensor_dev_attr(attr)->index;
275 struct w83l786ng_data *data = w83l786ng_update_device(dev);
276 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
277}
278
279/* Note: we save and restore the fan minimum here, because its value is
280 determined in part by the fan divisor. This follows the principle of
281 least surprise; the user doesn't expect the fan minimum to change just
282 because the divisor changed. */
283static ssize_t
284store_fan_div(struct device *dev, struct device_attribute *attr,
285 const char *buf, size_t count)
286{
287 int nr = to_sensor_dev_attr(attr)->index;
288 struct i2c_client *client = to_i2c_client(dev);
289 struct w83l786ng_data *data = i2c_get_clientdata(client);
290
291 unsigned long min;
292 u8 tmp_fan_div;
293 u8 fan_div_reg;
294 u8 keep_mask = 0;
295 u8 new_shift = 0;
296
297 /* Save fan_min */
298 mutex_lock(&data->update_lock);
299 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
300
301 data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10));
302
303 switch (nr) {
304 case 0:
305 keep_mask = 0xf8;
306 new_shift = 0;
307 break;
308 case 1:
309 keep_mask = 0x8f;
310 new_shift = 4;
311 break;
312 }
313
314 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
315 & keep_mask;
316
317 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
318
319 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
320 fan_div_reg | tmp_fan_div);
321
322 /* Restore fan_min */
323 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
324 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
325 data->fan_min[nr]);
326 mutex_unlock(&data->update_lock);
327
328 return count;
329}
330
331static struct sensor_device_attribute sda_fan_input[] = {
332 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
333 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
334};
335
336static struct sensor_device_attribute sda_fan_min[] = {
337 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
338 store_fan_min, 0),
339 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
340 store_fan_min, 1),
341};
342
343static struct sensor_device_attribute sda_fan_div[] = {
344 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
345 store_fan_div, 0),
346 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
347 store_fan_div, 1),
348};
349
350
351/* read/write the temperature, includes measured value and limits */
352
353static ssize_t
354show_temp(struct device *dev, struct device_attribute *attr, char *buf)
355{
356 struct sensor_device_attribute_2 *sensor_attr =
357 to_sensor_dev_attr_2(attr);
358 int nr = sensor_attr->nr;
359 int index = sensor_attr->index;
360 struct w83l786ng_data *data = w83l786ng_update_device(dev);
361 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
362}
363
364static ssize_t
365store_temp(struct device *dev, struct device_attribute *attr,
366 const char *buf, size_t count)
367{
368 struct sensor_device_attribute_2 *sensor_attr =
369 to_sensor_dev_attr_2(attr);
370 int nr = sensor_attr->nr;
371 int index = sensor_attr->index;
372 struct i2c_client *client = to_i2c_client(dev);
373 struct w83l786ng_data *data = i2c_get_clientdata(client);
374 s32 val;
375
376 val = simple_strtol(buf, NULL, 10);
377 mutex_lock(&data->update_lock);
378 data->temp[nr][index] = TEMP_TO_REG(val);
379 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
380 data->temp[nr][index]);
381 mutex_unlock(&data->update_lock);
382
383 return count;
384}
385
386static struct sensor_device_attribute_2 sda_temp_input[] = {
387 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
388 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
389};
390
391static struct sensor_device_attribute_2 sda_temp_max[] = {
392 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
393 show_temp, store_temp, 0, 1),
394 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
395 show_temp, store_temp, 1, 1),
396};
397
398static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
399 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
400 show_temp, store_temp, 0, 2),
401 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
402 show_temp, store_temp, 1, 2),
403};
404
405#define show_pwm_reg(reg) \
406static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \
407 char *buf) \
408{ \
409 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
410 int nr = to_sensor_dev_attr(attr)->index; \
411 return sprintf(buf, "%d\n", data->reg[nr]); \
412}
413
414show_pwm_reg(pwm_mode)
415show_pwm_reg(pwm_enable)
416show_pwm_reg(pwm)
417
418static ssize_t
419store_pwm_mode(struct device *dev, struct device_attribute *attr,
420 const char *buf, size_t count)
421{
422 int nr = to_sensor_dev_attr(attr)->index;
423 struct i2c_client *client = to_i2c_client(dev);
424 struct w83l786ng_data *data = i2c_get_clientdata(client);
425 u32 val = simple_strtoul(buf, NULL, 10);
426 u8 reg;
427
428 if (val > 1)
429 return -EINVAL;
430 mutex_lock(&data->update_lock);
431 data->pwm_mode[nr] = val;
432 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
433 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
434 if (!val)
435 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
436 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
437 mutex_unlock(&data->update_lock);
438 return count;
439}
440
441static ssize_t
442store_pwm(struct device *dev, struct device_attribute *attr,
443 const char *buf, size_t count)
444{
445 int nr = to_sensor_dev_attr(attr)->index;
446 struct i2c_client *client = to_i2c_client(dev);
447 struct w83l786ng_data *data = i2c_get_clientdata(client);
448 u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255);
449
450 mutex_lock(&data->update_lock);
451 data->pwm[nr] = val;
452 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
453 mutex_unlock(&data->update_lock);
454 return count;
455}
456
457static ssize_t
458store_pwm_enable(struct device *dev, struct device_attribute *attr,
459 const char *buf, size_t count)
460{
461 int nr = to_sensor_dev_attr(attr)->index;
462 struct i2c_client *client = to_i2c_client(dev);
463 struct w83l786ng_data *data = i2c_get_clientdata(client);
464 u32 val = simple_strtoul(buf, NULL, 10);
465
466 u8 reg;
467
468 if (!val || (val > 2)) /* only modes 1 and 2 are supported */
469 return -EINVAL;
470
471 mutex_lock(&data->update_lock);
472 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
473 data->pwm_enable[nr] = val;
474 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
475 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
476 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
477 mutex_unlock(&data->update_lock);
478 return count;
479}
480
481static struct sensor_device_attribute sda_pwm[] = {
482 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
483 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
484};
485
486static struct sensor_device_attribute sda_pwm_mode[] = {
487 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
488 store_pwm_mode, 0),
489 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
490 store_pwm_mode, 1),
491};
492
493static struct sensor_device_attribute sda_pwm_enable[] = {
494 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
495 store_pwm_enable, 0),
496 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
497 store_pwm_enable, 1),
498};
499
500/* For Smart Fan I/Thermal Cruise and Smart Fan II */
501static ssize_t
502show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
503{
504 int nr = to_sensor_dev_attr(attr)->index;
505 struct w83l786ng_data *data = w83l786ng_update_device(dev);
506 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
507}
508
509static ssize_t
510store_tolerance(struct device *dev, struct device_attribute *attr,
511 const char *buf, size_t count)
512{
513 int nr = to_sensor_dev_attr(attr)->index;
514 struct i2c_client *client = to_i2c_client(dev);
515 struct w83l786ng_data *data = i2c_get_clientdata(client);
516 u32 val;
517 u8 tol_tmp, tol_mask;
518
519 val = simple_strtoul(buf, NULL, 10);
520
521 mutex_lock(&data->update_lock);
522 tol_mask = w83l786ng_read_value(client,
523 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
524 tol_tmp = SENSORS_LIMIT(val, 0, 15);
525 tol_tmp &= 0x0f;
526 data->tolerance[nr] = tol_tmp;
527 if (nr == 1) {
528 tol_tmp <<= 4;
529 }
530
531 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
532 tol_mask | tol_tmp);
533 mutex_unlock(&data->update_lock);
534 return count;
535}
536
537static struct sensor_device_attribute sda_tolerance[] = {
538 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
539 show_tolerance, store_tolerance, 0),
540 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
541 show_tolerance, store_tolerance, 1),
542};
543
544
545#define IN_UNIT_ATTRS(X) \
546 &sda_in_input[X].dev_attr.attr, \
547 &sda_in_min[X].dev_attr.attr, \
548 &sda_in_max[X].dev_attr.attr
549
550#define FAN_UNIT_ATTRS(X) \
551 &sda_fan_input[X].dev_attr.attr, \
552 &sda_fan_min[X].dev_attr.attr, \
553 &sda_fan_div[X].dev_attr.attr
554
555#define TEMP_UNIT_ATTRS(X) \
556 &sda_temp_input[X].dev_attr.attr, \
557 &sda_temp_max[X].dev_attr.attr, \
558 &sda_temp_max_hyst[X].dev_attr.attr
559
560#define PWM_UNIT_ATTRS(X) \
561 &sda_pwm[X].dev_attr.attr, \
562 &sda_pwm_mode[X].dev_attr.attr, \
563 &sda_pwm_enable[X].dev_attr.attr
564
565#define TOLERANCE_UNIT_ATTRS(X) \
566 &sda_tolerance[X].dev_attr.attr
567
568static struct attribute *w83l786ng_attributes[] = {
569 IN_UNIT_ATTRS(0),
570 IN_UNIT_ATTRS(1),
571 IN_UNIT_ATTRS(2),
572 FAN_UNIT_ATTRS(0),
573 FAN_UNIT_ATTRS(1),
574 TEMP_UNIT_ATTRS(0),
575 TEMP_UNIT_ATTRS(1),
576 PWM_UNIT_ATTRS(0),
577 PWM_UNIT_ATTRS(1),
578 TOLERANCE_UNIT_ATTRS(0),
579 TOLERANCE_UNIT_ATTRS(1),
580 NULL
581};
582
583static const struct attribute_group w83l786ng_group = {
584 .attrs = w83l786ng_attributes,
585};
586
587static int
588w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info)
589{
590 struct i2c_adapter *adapter = client->adapter;
591 u16 man_id;
592 u8 chip_id;
593
594 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
595 return -ENODEV;
596 }
597
598 /* Detection */
599 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) {
600 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n",
601 client->addr);
602 return -ENODEV;
603 }
604
605 /* Identification */
606 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) +
607 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
608 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
609
610 if (man_id != 0x5CA3 || /* Winbond */
611 chip_id != 0x80) { /* W83L786NG */
612 dev_dbg(&adapter->dev,
613 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
614 man_id, chip_id);
615 return -ENODEV;
616 }
617
618 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
619
620 return 0;
621}
622
623static int
624w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
625{
626 struct device *dev = &client->dev;
627 struct w83l786ng_data *data;
628 int i, err = 0;
629 u8 reg_tmp;
630
631 data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL);
632 if (!data) {
633 err = -ENOMEM;
634 goto exit;
635 }
636
637 i2c_set_clientdata(client, data);
638 mutex_init(&data->update_lock);
639
640 /* Initialize the chip */
641 w83l786ng_init_client(client);
642
643 /* A few vars need to be filled upon startup */
644 for (i = 0; i < 2; i++) {
645 data->fan_min[i] = w83l786ng_read_value(client,
646 W83L786NG_REG_FAN_MIN(i));
647 }
648
649 /* Update the fan divisor */
650 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
651 data->fan_div[0] = reg_tmp & 0x07;
652 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
653
654 /* Register sysfs hooks */
655 if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group)))
656 goto exit_remove;
657
658 data->hwmon_dev = hwmon_device_register(dev);
659 if (IS_ERR(data->hwmon_dev)) {
660 err = PTR_ERR(data->hwmon_dev);
661 goto exit_remove;
662 }
663
664 return 0;
665
666 /* Unregister sysfs hooks */
667
668exit_remove:
669 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
670 kfree(data);
671exit:
672 return err;
673}
674
675static int
676w83l786ng_remove(struct i2c_client *client)
677{
678 struct w83l786ng_data *data = i2c_get_clientdata(client);
679
680 hwmon_device_unregister(data->hwmon_dev);
681 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
682
683 kfree(data);
684
685 return 0;
686}
687
688static void
689w83l786ng_init_client(struct i2c_client *client)
690{
691 u8 tmp;
692
693 if (reset)
694 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
695
696 /* Start monitoring */
697 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
698 if (!(tmp & 0x01))
699 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
700}
701
702static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
703{
704 struct i2c_client *client = to_i2c_client(dev);
705 struct w83l786ng_data *data = i2c_get_clientdata(client);
706 int i, j;
707 u8 reg_tmp, pwmcfg;
708
709 mutex_lock(&data->update_lock);
710 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
711 || !data->valid) {
712 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
713
714 /* Update the voltages measured value and limits */
715 for (i = 0; i < 3; i++) {
716 data->in[i] = w83l786ng_read_value(client,
717 W83L786NG_REG_IN(i));
718 data->in_min[i] = w83l786ng_read_value(client,
719 W83L786NG_REG_IN_MIN(i));
720 data->in_max[i] = w83l786ng_read_value(client,
721 W83L786NG_REG_IN_MAX(i));
722 }
723
724 /* Update the fan counts and limits */
725 for (i = 0; i < 2; i++) {
726 data->fan[i] = w83l786ng_read_value(client,
727 W83L786NG_REG_FAN(i));
728 data->fan_min[i] = w83l786ng_read_value(client,
729 W83L786NG_REG_FAN_MIN(i));
730 }
731
732 /* Update the fan divisor */
733 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
734 data->fan_div[0] = reg_tmp & 0x07;
735 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
736
737 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
738 for (i = 0; i < 2; i++) {
739 data->pwm_mode[i] =
740 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
741 ? 0 : 1;
742 data->pwm_enable[i] =
743 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1;
744 data->pwm[i] = w83l786ng_read_value(client,
745 W83L786NG_REG_PWM[i]);
746 }
747
748
749 /* Update the temperature sensors */
750 for (i = 0; i < 2; i++) {
751 for (j = 0; j < 3; j++) {
752 data->temp[i][j] = w83l786ng_read_value(client,
753 W83L786NG_REG_TEMP[i][j]);
754 }
755 }
756
757 /* Update Smart Fan I/II tolerance */
758 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
759 data->tolerance[0] = reg_tmp & 0x0f;
760 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
761
762 data->last_updated = jiffies;
763 data->valid = 1;
764
765 }
766
767 mutex_unlock(&data->update_lock);
768
769 return data;
770}
771
772static int __init
773sensors_w83l786ng_init(void)
774{
775 return i2c_add_driver(&w83l786ng_driver);
776}
777
778static void __exit
779sensors_w83l786ng_exit(void)
780{
781 i2c_del_driver(&w83l786ng_driver);
782}
783
784MODULE_AUTHOR("Kevin Lo");
785MODULE_DESCRIPTION("w83l786ng driver");
786MODULE_LICENSE("GPL");
787
788module_init(sensors_w83l786ng_init);
789module_exit(sensors_w83l786ng_exit);