1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * f75375s.c - driver for the Fintek F75375/SP, F75373 and
4 * F75387SG/RG hardware monitoring features
5 * Copyright (C) 2006-2007 Riku Voipio
6 *
7 * Datasheets available at:
8 *
9 * f75375:
10 * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf
11 *
12 * f75373:
13 * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf
14 *
15 * f75387:
16 * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf
17 */
18
19 #include <linux/module.h>
20 #include <linux/jiffies.h>
21 #include <linux/hwmon.h>
22 #include <linux/hwmon-sysfs.h>
23 #include <linux/i2c.h>
24 #include <linux/err.h>
25 #include <linux/mutex.h>
26 #include <linux/f75375s.h>
27 #include <linux/slab.h>
28
29 /* Addresses to scan */
30 static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
31
32 enum chips { f75373, f75375, f75387 };
33
34 /* Fintek F75375 registers */
35 #define F75375_REG_CONFIG0 0x0
36 #define F75375_REG_CONFIG1 0x1
37 #define F75375_REG_CONFIG2 0x2
38 #define F75375_REG_CONFIG3 0x3
39 #define F75375_REG_ADDR 0x4
40 #define F75375_REG_INTR 0x31
41 #define F75375_CHIP_ID 0x5A
42 #define F75375_REG_VERSION 0x5C
43 #define F75375_REG_VENDOR 0x5D
44 #define F75375_REG_FAN_TIMER 0x60
45
46 #define F75375_REG_VOLT(nr) (0x10 + (nr))
47 #define F75375_REG_VOLT_HIGH(nr) (0x20 + (nr) * 2)
48 #define F75375_REG_VOLT_LOW(nr) (0x21 + (nr) * 2)
49
50 #define F75375_REG_TEMP(nr) (0x14 + (nr))
51 #define F75387_REG_TEMP11_LSB(nr) (0x1a + (nr))
52 #define F75375_REG_TEMP_HIGH(nr) (0x28 + (nr) * 2)
53 #define F75375_REG_TEMP_HYST(nr) (0x29 + (nr) * 2)
54
55 #define F75375_REG_FAN(nr) (0x16 + (nr) * 2)
56 #define F75375_REG_FAN_MIN(nr) (0x2C + (nr) * 2)
57 #define F75375_REG_FAN_FULL(nr) (0x70 + (nr) * 0x10)
58 #define F75375_REG_FAN_PWM_DUTY(nr) (0x76 + (nr) * 0x10)
59 #define F75375_REG_FAN_PWM_CLOCK(nr) (0x7D + (nr) * 0x10)
60
61 #define F75375_REG_FAN_EXP(nr) (0x74 + (nr) * 0x10)
62 #define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
63 #define F75375_REG_FAN_B_SPEED(nr, step) \
64 ((0xA5 + (nr) * 0x10) + (step) * 2)
65
66 #define F75375_REG_PWM1_RAISE_DUTY 0x69
67 #define F75375_REG_PWM2_RAISE_DUTY 0x6A
68 #define F75375_REG_PWM1_DROP_DUTY 0x6B
69 #define F75375_REG_PWM2_DROP_DUTY 0x6C
70
71 #define F75375_FAN_CTRL_LINEAR(nr) (4 + nr)
72 #define F75387_FAN_CTRL_LINEAR(nr) (1 + ((nr) * 4))
73 #define FAN_CTRL_MODE(nr) (4 + ((nr) * 2))
74 #define F75387_FAN_DUTY_MODE(nr) (2 + ((nr) * 4))
75 #define F75387_FAN_MANU_MODE(nr) ((nr) * 4)
76
77 /*
78 * Data structures and manipulation thereof
79 */
80
81 struct f75375_data {
82 unsigned short addr;
83 struct device *hwmon_dev;
84
85 const char *name;
86 int kind;
87 struct mutex update_lock; /* protect register access */
88 bool valid;
89 unsigned long last_updated; /* In jiffies */
90 unsigned long last_limits; /* In jiffies */
91
92 /* Register values */
93 u8 in[4];
94 u8 in_max[4];
95 u8 in_min[4];
96 u16 fan[2];
97 u16 fan_min[2];
98 u16 fan_max[2];
99 u16 fan_target[2];
100 u8 fan_timer;
101 u8 pwm[2];
102 u8 pwm_mode[2];
103 u8 pwm_enable[2];
104 /*
105 * f75387: For remote temperature reading, it uses signed 11-bit
106 * values with LSB = 0.125 degree Celsius, left-justified in 16-bit
107 * registers. For original 8-bit temp readings, the LSB just is 0.
108 */
109 s16 temp11[2];
110 s8 temp_high[2];
111 s8 temp_max_hyst[2];
112 };
113
f75375_read8(struct i2c_client * client,u8 reg)114 static inline int f75375_read8(struct i2c_client *client, u8 reg)
115 {
116 return i2c_smbus_read_byte_data(client, reg);
117 }
118
119 /* in most cases, should be called while holding update_lock */
f75375_read16(struct i2c_client * client,u8 reg)120 static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
121 {
122 return (i2c_smbus_read_byte_data(client, reg) << 8)
123 | i2c_smbus_read_byte_data(client, reg + 1);
124 }
125
f75375_write8(struct i2c_client * client,u8 reg,u8 value)126 static inline void f75375_write8(struct i2c_client *client, u8 reg,
127 u8 value)
128 {
129 i2c_smbus_write_byte_data(client, reg, value);
130 }
131
f75375_write16(struct i2c_client * client,u8 reg,u16 value)132 static inline void f75375_write16(struct i2c_client *client, u8 reg,
133 u16 value)
134 {
135 int err = i2c_smbus_write_byte_data(client, reg, (value >> 8));
136 if (err)
137 return;
138 i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
139 }
140
f75375_write_pwm(struct i2c_client * client,int nr)141 static void f75375_write_pwm(struct i2c_client *client, int nr)
142 {
143 struct f75375_data *data = i2c_get_clientdata(client);
144 if (data->kind == f75387)
145 f75375_write16(client, F75375_REG_FAN_EXP(nr), data->pwm[nr]);
146 else
147 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
148 data->pwm[nr]);
149 }
150
f75375_update_device(struct device * dev)151 static struct f75375_data *f75375_update_device(struct device *dev)
152 {
153 struct i2c_client *client = to_i2c_client(dev);
154 struct f75375_data *data = i2c_get_clientdata(client);
155 int nr;
156
157 mutex_lock(&data->update_lock);
158
159 /* Limit registers cache is refreshed after 60 seconds */
160 if (time_after(jiffies, data->last_limits + 60 * HZ)
161 || !data->valid) {
162 for (nr = 0; nr < 2; nr++) {
163 data->temp_high[nr] =
164 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
165 data->temp_max_hyst[nr] =
166 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
167 data->fan_max[nr] =
168 f75375_read16(client, F75375_REG_FAN_FULL(nr));
169 data->fan_min[nr] =
170 f75375_read16(client, F75375_REG_FAN_MIN(nr));
171 data->fan_target[nr] =
172 f75375_read16(client, F75375_REG_FAN_EXP(nr));
173 }
174 for (nr = 0; nr < 4; nr++) {
175 data->in_max[nr] =
176 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
177 data->in_min[nr] =
178 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
179 }
180 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
181 data->last_limits = jiffies;
182 }
183
184 /* Measurement registers cache is refreshed after 2 second */
185 if (time_after(jiffies, data->last_updated + 2 * HZ)
186 || !data->valid) {
187 for (nr = 0; nr < 2; nr++) {
188 data->pwm[nr] = f75375_read8(client,
189 F75375_REG_FAN_PWM_DUTY(nr));
190 /* assign MSB, therefore shift it by 8 bits */
191 data->temp11[nr] =
192 f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
193 if (data->kind == f75387)
194 /* merge F75387's temperature LSB (11-bit) */
195 data->temp11[nr] |=
196 f75375_read8(client,
197 F75387_REG_TEMP11_LSB(nr));
198 data->fan[nr] =
199 f75375_read16(client, F75375_REG_FAN(nr));
200 }
201 for (nr = 0; nr < 4; nr++)
202 data->in[nr] =
203 f75375_read8(client, F75375_REG_VOLT(nr));
204
205 data->last_updated = jiffies;
206 data->valid = true;
207 }
208
209 mutex_unlock(&data->update_lock);
210 return data;
211 }
212
rpm_from_reg(u16 reg)213 static inline u16 rpm_from_reg(u16 reg)
214 {
215 if (reg == 0 || reg == 0xffff)
216 return 0;
217 return 1500000 / reg;
218 }
219
rpm_to_reg(int rpm)220 static inline u16 rpm_to_reg(int rpm)
221 {
222 if (rpm < 367 || rpm > 0xffff)
223 return 0xffff;
224 return 1500000 / rpm;
225 }
226
duty_mode_enabled(u8 pwm_enable)227 static bool duty_mode_enabled(u8 pwm_enable)
228 {
229 switch (pwm_enable) {
230 case 0: /* Manual, duty mode (full speed) */
231 case 1: /* Manual, duty mode */
232 case 4: /* Auto, duty mode */
233 return true;
234 case 2: /* Auto, speed mode */
235 case 3: /* Manual, speed mode */
236 return false;
237 default:
238 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
239 return true;
240 }
241 }
242
auto_mode_enabled(u8 pwm_enable)243 static bool auto_mode_enabled(u8 pwm_enable)
244 {
245 switch (pwm_enable) {
246 case 0: /* Manual, duty mode (full speed) */
247 case 1: /* Manual, duty mode */
248 case 3: /* Manual, speed mode */
249 return false;
250 case 2: /* Auto, speed mode */
251 case 4: /* Auto, duty mode */
252 return true;
253 default:
254 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
255 return false;
256 }
257 }
258
set_fan_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)259 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
260 const char *buf, size_t count)
261 {
262 int nr = to_sensor_dev_attr(attr)->index;
263 struct i2c_client *client = to_i2c_client(dev);
264 struct f75375_data *data = i2c_get_clientdata(client);
265 unsigned long val;
266 int err;
267
268 err = kstrtoul(buf, 10, &val);
269 if (err < 0)
270 return err;
271
272 mutex_lock(&data->update_lock);
273 data->fan_min[nr] = rpm_to_reg(val);
274 f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
275 mutex_unlock(&data->update_lock);
276 return count;
277 }
278
set_fan_target(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)279 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
280 const char *buf, size_t count)
281 {
282 int nr = to_sensor_dev_attr(attr)->index;
283 struct i2c_client *client = to_i2c_client(dev);
284 struct f75375_data *data = i2c_get_clientdata(client);
285 unsigned long val;
286 int err;
287
288 err = kstrtoul(buf, 10, &val);
289 if (err < 0)
290 return err;
291
292 if (auto_mode_enabled(data->pwm_enable[nr]))
293 return -EINVAL;
294 if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
295 return -EINVAL;
296
297 mutex_lock(&data->update_lock);
298 data->fan_target[nr] = rpm_to_reg(val);
299 f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
300 mutex_unlock(&data->update_lock);
301 return count;
302 }
303
set_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)304 static ssize_t set_pwm(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 i2c_client *client = to_i2c_client(dev);
309 struct f75375_data *data = i2c_get_clientdata(client);
310 unsigned long val;
311 int err;
312
313 err = kstrtoul(buf, 10, &val);
314 if (err < 0)
315 return err;
316
317 if (auto_mode_enabled(data->pwm_enable[nr]) ||
318 !duty_mode_enabled(data->pwm_enable[nr]))
319 return -EINVAL;
320
321 mutex_lock(&data->update_lock);
322 data->pwm[nr] = clamp_val(val, 0, 255);
323 f75375_write_pwm(client, nr);
324 mutex_unlock(&data->update_lock);
325 return count;
326 }
327
show_pwm_enable(struct device * dev,struct device_attribute * attr,char * buf)328 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
329 *attr, char *buf)
330 {
331 int nr = to_sensor_dev_attr(attr)->index;
332 struct f75375_data *data = f75375_update_device(dev);
333 return sprintf(buf, "%d\n", data->pwm_enable[nr]);
334 }
335
set_pwm_enable_direct(struct i2c_client * client,int nr,int val)336 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
337 {
338 struct f75375_data *data = i2c_get_clientdata(client);
339 u8 fanmode;
340
341 if (val < 0 || val > 4)
342 return -EINVAL;
343
344 fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
345 if (data->kind == f75387) {
346 /* For now, deny dangerous toggling of duty mode */
347 if (duty_mode_enabled(data->pwm_enable[nr]) !=
348 duty_mode_enabled(val))
349 return -EOPNOTSUPP;
350 /* clear each fanX_mode bit before setting them properly */
351 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
352 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
353 switch (val) {
354 case 0: /* full speed */
355 fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
356 fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
357 data->pwm[nr] = 255;
358 break;
359 case 1: /* PWM */
360 fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
361 fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
362 break;
363 case 2: /* Automatic, speed mode */
364 break;
365 case 3: /* fan speed */
366 fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
367 break;
368 case 4: /* Automatic, pwm */
369 fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
370 break;
371 }
372 } else {
373 /* clear each fanX_mode bit before setting them properly */
374 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
375 switch (val) {
376 case 0: /* full speed */
377 fanmode |= (3 << FAN_CTRL_MODE(nr));
378 data->pwm[nr] = 255;
379 break;
380 case 1: /* PWM */
381 fanmode |= (3 << FAN_CTRL_MODE(nr));
382 break;
383 case 2: /* AUTOMATIC*/
384 fanmode |= (1 << FAN_CTRL_MODE(nr));
385 break;
386 case 3: /* fan speed */
387 break;
388 case 4: /* Automatic pwm */
389 return -EINVAL;
390 }
391 }
392
393 f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
394 data->pwm_enable[nr] = val;
395 if (val == 0)
396 f75375_write_pwm(client, nr);
397 return 0;
398 }
399
set_pwm_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)400 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
401 const char *buf, size_t count)
402 {
403 int nr = to_sensor_dev_attr(attr)->index;
404 struct i2c_client *client = to_i2c_client(dev);
405 struct f75375_data *data = i2c_get_clientdata(client);
406 unsigned long val;
407 int err;
408
409 err = kstrtoul(buf, 10, &val);
410 if (err < 0)
411 return err;
412
413 mutex_lock(&data->update_lock);
414 err = set_pwm_enable_direct(client, nr, val);
415 mutex_unlock(&data->update_lock);
416 return err ? err : count;
417 }
418
set_pwm_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)419 static ssize_t set_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 f75375_data *data = i2c_get_clientdata(client);
425 unsigned long val;
426 int err;
427 u8 conf;
428 char reg, ctrl;
429
430 err = kstrtoul(buf, 10, &val);
431 if (err < 0)
432 return err;
433
434 if (!(val == 0 || val == 1))
435 return -EINVAL;
436
437 /* F75373 does not support DC (linear voltage) fan control mode */
438 if (data->kind == f75373 && val == 0)
439 return -EINVAL;
440
441 /* take care for different registers */
442 if (data->kind == f75387) {
443 reg = F75375_REG_FAN_TIMER;
444 ctrl = F75387_FAN_CTRL_LINEAR(nr);
445 } else {
446 reg = F75375_REG_CONFIG1;
447 ctrl = F75375_FAN_CTRL_LINEAR(nr);
448 }
449
450 mutex_lock(&data->update_lock);
451 conf = f75375_read8(client, reg);
452 conf &= ~(1 << ctrl);
453
454 if (val == 0)
455 conf |= (1 << ctrl);
456
457 f75375_write8(client, reg, conf);
458 data->pwm_mode[nr] = val;
459 mutex_unlock(&data->update_lock);
460 return count;
461 }
462
show_pwm(struct device * dev,struct device_attribute * attr,char * buf)463 static ssize_t show_pwm(struct device *dev, struct device_attribute
464 *attr, char *buf)
465 {
466 int nr = to_sensor_dev_attr(attr)->index;
467 struct f75375_data *data = f75375_update_device(dev);
468 return sprintf(buf, "%d\n", data->pwm[nr]);
469 }
470
show_pwm_mode(struct device * dev,struct device_attribute * attr,char * buf)471 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
472 *attr, char *buf)
473 {
474 int nr = to_sensor_dev_attr(attr)->index;
475 struct f75375_data *data = f75375_update_device(dev);
476 return sprintf(buf, "%d\n", data->pwm_mode[nr]);
477 }
478
479 #define VOLT_FROM_REG(val) ((val) * 8)
480 #define VOLT_TO_REG(val) ((val) / 8)
481
show_in(struct device * dev,struct device_attribute * attr,char * buf)482 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
483 char *buf)
484 {
485 int nr = to_sensor_dev_attr(attr)->index;
486 struct f75375_data *data = f75375_update_device(dev);
487 return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
488 }
489
show_in_max(struct device * dev,struct device_attribute * attr,char * buf)490 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
491 char *buf)
492 {
493 int nr = to_sensor_dev_attr(attr)->index;
494 struct f75375_data *data = f75375_update_device(dev);
495 return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
496 }
497
show_in_min(struct device * dev,struct device_attribute * attr,char * buf)498 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
499 char *buf)
500 {
501 int nr = to_sensor_dev_attr(attr)->index;
502 struct f75375_data *data = f75375_update_device(dev);
503 return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
504 }
505
set_in_max(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)506 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
507 const char *buf, size_t count)
508 {
509 int nr = to_sensor_dev_attr(attr)->index;
510 struct i2c_client *client = to_i2c_client(dev);
511 struct f75375_data *data = i2c_get_clientdata(client);
512 unsigned long val;
513 int err;
514
515 err = kstrtoul(buf, 10, &val);
516 if (err < 0)
517 return err;
518
519 val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
520 mutex_lock(&data->update_lock);
521 data->in_max[nr] = val;
522 f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
523 mutex_unlock(&data->update_lock);
524 return count;
525 }
526
set_in_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)527 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
528 const char *buf, size_t count)
529 {
530 int nr = to_sensor_dev_attr(attr)->index;
531 struct i2c_client *client = to_i2c_client(dev);
532 struct f75375_data *data = i2c_get_clientdata(client);
533 unsigned long val;
534 int err;
535
536 err = kstrtoul(buf, 10, &val);
537 if (err < 0)
538 return err;
539
540 val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
541 mutex_lock(&data->update_lock);
542 data->in_min[nr] = val;
543 f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
544 mutex_unlock(&data->update_lock);
545 return count;
546 }
547 #define TEMP_FROM_REG(val) ((val) * 1000)
548 #define TEMP_TO_REG(val) ((val) / 1000)
549 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
550
show_temp11(struct device * dev,struct device_attribute * attr,char * buf)551 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
552 char *buf)
553 {
554 int nr = to_sensor_dev_attr(attr)->index;
555 struct f75375_data *data = f75375_update_device(dev);
556 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
557 }
558
show_temp_max(struct device * dev,struct device_attribute * attr,char * buf)559 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
560 char *buf)
561 {
562 int nr = to_sensor_dev_attr(attr)->index;
563 struct f75375_data *data = f75375_update_device(dev);
564 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
565 }
566
show_temp_max_hyst(struct device * dev,struct device_attribute * attr,char * buf)567 static ssize_t show_temp_max_hyst(struct device *dev,
568 struct device_attribute *attr, char *buf)
569 {
570 int nr = to_sensor_dev_attr(attr)->index;
571 struct f75375_data *data = f75375_update_device(dev);
572 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
573 }
574
set_temp_max(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)575 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
576 const char *buf, size_t count)
577 {
578 int nr = to_sensor_dev_attr(attr)->index;
579 struct i2c_client *client = to_i2c_client(dev);
580 struct f75375_data *data = i2c_get_clientdata(client);
581 unsigned long val;
582 int err;
583
584 err = kstrtoul(buf, 10, &val);
585 if (err < 0)
586 return err;
587
588 val = clamp_val(TEMP_TO_REG(val), 0, 127);
589 mutex_lock(&data->update_lock);
590 data->temp_high[nr] = val;
591 f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
592 mutex_unlock(&data->update_lock);
593 return count;
594 }
595
set_temp_max_hyst(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)596 static ssize_t set_temp_max_hyst(struct device *dev,
597 struct device_attribute *attr, const char *buf, size_t count)
598 {
599 int nr = to_sensor_dev_attr(attr)->index;
600 struct i2c_client *client = to_i2c_client(dev);
601 struct f75375_data *data = i2c_get_clientdata(client);
602 unsigned long val;
603 int err;
604
605 err = kstrtoul(buf, 10, &val);
606 if (err < 0)
607 return err;
608
609 val = clamp_val(TEMP_TO_REG(val), 0, 127);
610 mutex_lock(&data->update_lock);
611 data->temp_max_hyst[nr] = val;
612 f75375_write8(client, F75375_REG_TEMP_HYST(nr),
613 data->temp_max_hyst[nr]);
614 mutex_unlock(&data->update_lock);
615 return count;
616 }
617
618 #define show_fan(thing) \
619 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
620 char *buf)\
621 {\
622 int nr = to_sensor_dev_attr(attr)->index;\
623 struct f75375_data *data = f75375_update_device(dev); \
624 return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
625 }
626
627 show_fan(fan);
628 show_fan(fan_min);
629 show_fan(fan_max);
630 show_fan(fan_target);
631
632 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
633 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
634 show_in_max, set_in_max, 0);
635 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
636 show_in_min, set_in_min, 0);
637 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
638 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
639 show_in_max, set_in_max, 1);
640 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
641 show_in_min, set_in_min, 1);
642 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
643 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
644 show_in_max, set_in_max, 2);
645 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
646 show_in_min, set_in_min, 2);
647 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
648 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
649 show_in_max, set_in_max, 3);
650 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
651 show_in_min, set_in_min, 3);
652 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
653 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
654 show_temp_max_hyst, set_temp_max_hyst, 0);
655 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
656 show_temp_max, set_temp_max, 0);
657 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
658 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
659 show_temp_max_hyst, set_temp_max_hyst, 1);
660 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
661 show_temp_max, set_temp_max, 1);
662 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
663 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
664 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
665 show_fan_min, set_fan_min, 0);
666 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
667 show_fan_target, set_fan_target, 0);
668 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
669 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
670 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
671 show_fan_min, set_fan_min, 1);
672 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
673 show_fan_target, set_fan_target, 1);
674 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
675 show_pwm, set_pwm, 0);
676 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
677 show_pwm_enable, set_pwm_enable, 0);
678 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
679 show_pwm_mode, set_pwm_mode, 0);
680 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
681 show_pwm, set_pwm, 1);
682 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
683 show_pwm_enable, set_pwm_enable, 1);
684 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
685 show_pwm_mode, set_pwm_mode, 1);
686
687 static struct attribute *f75375_attributes[] = {
688 &sensor_dev_attr_temp1_input.dev_attr.attr,
689 &sensor_dev_attr_temp1_max.dev_attr.attr,
690 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
691 &sensor_dev_attr_temp2_input.dev_attr.attr,
692 &sensor_dev_attr_temp2_max.dev_attr.attr,
693 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
694 &sensor_dev_attr_fan1_input.dev_attr.attr,
695 &sensor_dev_attr_fan1_max.dev_attr.attr,
696 &sensor_dev_attr_fan1_min.dev_attr.attr,
697 &sensor_dev_attr_fan1_target.dev_attr.attr,
698 &sensor_dev_attr_fan2_input.dev_attr.attr,
699 &sensor_dev_attr_fan2_max.dev_attr.attr,
700 &sensor_dev_attr_fan2_min.dev_attr.attr,
701 &sensor_dev_attr_fan2_target.dev_attr.attr,
702 &sensor_dev_attr_pwm1.dev_attr.attr,
703 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
704 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
705 &sensor_dev_attr_pwm2.dev_attr.attr,
706 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
707 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
708 &sensor_dev_attr_in0_input.dev_attr.attr,
709 &sensor_dev_attr_in0_max.dev_attr.attr,
710 &sensor_dev_attr_in0_min.dev_attr.attr,
711 &sensor_dev_attr_in1_input.dev_attr.attr,
712 &sensor_dev_attr_in1_max.dev_attr.attr,
713 &sensor_dev_attr_in1_min.dev_attr.attr,
714 &sensor_dev_attr_in2_input.dev_attr.attr,
715 &sensor_dev_attr_in2_max.dev_attr.attr,
716 &sensor_dev_attr_in2_min.dev_attr.attr,
717 &sensor_dev_attr_in3_input.dev_attr.attr,
718 &sensor_dev_attr_in3_max.dev_attr.attr,
719 &sensor_dev_attr_in3_min.dev_attr.attr,
720 NULL
721 };
722
723 static const struct attribute_group f75375_group = {
724 .attrs = f75375_attributes,
725 };
726
f75375_init(struct i2c_client * client,struct f75375_data * data,struct f75375s_platform_data * f75375s_pdata)727 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
728 struct f75375s_platform_data *f75375s_pdata)
729 {
730 int nr;
731
732 if (!f75375s_pdata) {
733 u8 conf, mode;
734 int nr;
735
736 conf = f75375_read8(client, F75375_REG_CONFIG1);
737 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
738 for (nr = 0; nr < 2; nr++) {
739 if (data->kind == f75387) {
740 bool manu, duty;
741
742 if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
743 data->pwm_mode[nr] = 1;
744
745 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
746 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
747 if (!manu && duty)
748 /* auto, pwm */
749 data->pwm_enable[nr] = 4;
750 else if (manu && !duty)
751 /* manual, speed */
752 data->pwm_enable[nr] = 3;
753 else if (!manu && !duty)
754 /* automatic, speed */
755 data->pwm_enable[nr] = 2;
756 else
757 /* manual, pwm */
758 data->pwm_enable[nr] = 1;
759 } else {
760 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
761 data->pwm_mode[nr] = 1;
762
763 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
764 case 0: /* speed */
765 data->pwm_enable[nr] = 3;
766 break;
767 case 1: /* automatic */
768 data->pwm_enable[nr] = 2;
769 break;
770 default: /* manual */
771 data->pwm_enable[nr] = 1;
772 break;
773 }
774 }
775 }
776 return;
777 }
778
779 set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
780 set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
781 for (nr = 0; nr < 2; nr++) {
782 if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
783 !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
784 continue;
785 data->pwm[nr] = clamp_val(f75375s_pdata->pwm[nr], 0, 255);
786 f75375_write_pwm(client, nr);
787 }
788
789 }
790
f75375_probe(struct i2c_client * client)791 static int f75375_probe(struct i2c_client *client)
792 {
793 struct f75375_data *data;
794 struct f75375s_platform_data *f75375s_pdata =
795 dev_get_platdata(&client->dev);
796 int err;
797
798 if (!i2c_check_functionality(client->adapter,
799 I2C_FUNC_SMBUS_BYTE_DATA))
800 return -EIO;
801 data = devm_kzalloc(&client->dev, sizeof(struct f75375_data),
802 GFP_KERNEL);
803 if (!data)
804 return -ENOMEM;
805
806 i2c_set_clientdata(client, data);
807 mutex_init(&data->update_lock);
808 data->kind = (uintptr_t)i2c_get_match_data(client);
809
810 err = sysfs_create_group(&client->dev.kobj, &f75375_group);
811 if (err)
812 return err;
813
814 if (data->kind != f75373) {
815 err = sysfs_chmod_file(&client->dev.kobj,
816 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
817 S_IRUGO | S_IWUSR);
818 if (err)
819 goto exit_remove;
820 err = sysfs_chmod_file(&client->dev.kobj,
821 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
822 S_IRUGO | S_IWUSR);
823 if (err)
824 goto exit_remove;
825 }
826
827 data->hwmon_dev = hwmon_device_register(&client->dev);
828 if (IS_ERR(data->hwmon_dev)) {
829 err = PTR_ERR(data->hwmon_dev);
830 goto exit_remove;
831 }
832
833 f75375_init(client, data, f75375s_pdata);
834
835 return 0;
836
837 exit_remove:
838 sysfs_remove_group(&client->dev.kobj, &f75375_group);
839 return err;
840 }
841
f75375_remove(struct i2c_client * client)842 static void f75375_remove(struct i2c_client *client)
843 {
844 struct f75375_data *data = i2c_get_clientdata(client);
845 hwmon_device_unregister(data->hwmon_dev);
846 sysfs_remove_group(&client->dev.kobj, &f75375_group);
847 }
848
849 /* Return 0 if detection is successful, -ENODEV otherwise */
f75375_detect(struct i2c_client * client,struct i2c_board_info * info)850 static int f75375_detect(struct i2c_client *client,
851 struct i2c_board_info *info)
852 {
853 struct i2c_adapter *adapter = client->adapter;
854 u16 vendid, chipid;
855 u8 version;
856 const char *name;
857
858 vendid = f75375_read16(client, F75375_REG_VENDOR);
859 chipid = f75375_read16(client, F75375_CHIP_ID);
860 if (vendid != 0x1934)
861 return -ENODEV;
862
863 if (chipid == 0x0306)
864 name = "f75375";
865 else if (chipid == 0x0204)
866 name = "f75373";
867 else if (chipid == 0x0410)
868 name = "f75387";
869 else
870 return -ENODEV;
871
872 version = f75375_read8(client, F75375_REG_VERSION);
873 dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
874 strscpy(info->type, name, I2C_NAME_SIZE);
875
876 return 0;
877 }
878
879 static const struct i2c_device_id f75375_id[] = {
880 { "f75373", f75373 },
881 { "f75375", f75375 },
882 { "f75387", f75387 },
883 { }
884 };
885 MODULE_DEVICE_TABLE(i2c, f75375_id);
886
887 static struct i2c_driver f75375_driver = {
888 .class = I2C_CLASS_HWMON,
889 .driver = {
890 .name = "f75375",
891 },
892 .probe = f75375_probe,
893 .remove = f75375_remove,
894 .id_table = f75375_id,
895 .detect = f75375_detect,
896 .address_list = normal_i2c,
897 };
898 module_i2c_driver(f75375_driver);
899
900 MODULE_AUTHOR("Riku Voipio");
901 MODULE_LICENSE("GPL");
902 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");
903