Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck...
[~shefty/rdma-dev.git] / drivers / hwmon / f75375s.c
1 /*
2  * f75375s.c - driver for the Fintek F75375/SP, F75373 and
3  *             F75387SG/RG hardware monitoring features
4  * Copyright (C) 2006-2007  Riku Voipio
5  *
6  * Datasheets available at:
7  *
8  * f75375:
9  * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf
10  *
11  * f75373:
12  * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf
13  *
14  * f75387:
15  * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf
16  *
17  * This program is free software; you can redistribute it and/or modify
18  * it under the terms of the GNU General Public License as published by
19  * the Free Software Foundation; either version 2 of the License, or
20  * (at your option) any later version.
21  *
22  * This program is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  * GNU General Public License for more details.
26  *
27  * You should have received a copy of the GNU General Public License
28  * along with this program; if not, write to the Free Software
29  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30  *
31  */
32
33 #include <linux/module.h>
34 #include <linux/jiffies.h>
35 #include <linux/hwmon.h>
36 #include <linux/hwmon-sysfs.h>
37 #include <linux/i2c.h>
38 #include <linux/err.h>
39 #include <linux/mutex.h>
40 #include <linux/f75375s.h>
41 #include <linux/slab.h>
42
43 /* Addresses to scan */
44 static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
45
46 enum chips { f75373, f75375, f75387 };
47
48 /* Fintek F75375 registers  */
49 #define F75375_REG_CONFIG0              0x0
50 #define F75375_REG_CONFIG1              0x1
51 #define F75375_REG_CONFIG2              0x2
52 #define F75375_REG_CONFIG3              0x3
53 #define F75375_REG_ADDR                 0x4
54 #define F75375_REG_INTR                 0x31
55 #define F75375_CHIP_ID                  0x5A
56 #define F75375_REG_VERSION              0x5C
57 #define F75375_REG_VENDOR               0x5D
58 #define F75375_REG_FAN_TIMER            0x60
59
60 #define F75375_REG_VOLT(nr)             (0x10 + (nr))
61 #define F75375_REG_VOLT_HIGH(nr)        (0x20 + (nr) * 2)
62 #define F75375_REG_VOLT_LOW(nr)         (0x21 + (nr) * 2)
63
64 #define F75375_REG_TEMP(nr)             (0x14 + (nr))
65 #define F75387_REG_TEMP11_LSB(nr)       (0x1a + (nr))
66 #define F75375_REG_TEMP_HIGH(nr)        (0x28 + (nr) * 2)
67 #define F75375_REG_TEMP_HYST(nr)        (0x29 + (nr) * 2)
68
69 #define F75375_REG_FAN(nr)              (0x16 + (nr) * 2)
70 #define F75375_REG_FAN_MIN(nr)          (0x2C + (nr) * 2)
71 #define F75375_REG_FAN_FULL(nr)         (0x70 + (nr) * 0x10)
72 #define F75375_REG_FAN_PWM_DUTY(nr)     (0x76 + (nr) * 0x10)
73 #define F75375_REG_FAN_PWM_CLOCK(nr)    (0x7D + (nr) * 0x10)
74
75 #define F75375_REG_FAN_EXP(nr)          (0x74 + (nr) * 0x10)
76 #define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
77 #define F75375_REG_FAN_B_SPEED(nr, step) \
78         ((0xA5 + (nr) * 0x10) + (step) * 2)
79
80 #define F75375_REG_PWM1_RAISE_DUTY      0x69
81 #define F75375_REG_PWM2_RAISE_DUTY      0x6A
82 #define F75375_REG_PWM1_DROP_DUTY       0x6B
83 #define F75375_REG_PWM2_DROP_DUTY       0x6C
84
85 #define F75375_FAN_CTRL_LINEAR(nr)      (4 + nr)
86 #define F75387_FAN_CTRL_LINEAR(nr)      (1 + ((nr) * 4))
87 #define FAN_CTRL_MODE(nr)               (4 + ((nr) * 2))
88 #define F75387_FAN_DUTY_MODE(nr)        (2 + ((nr) * 4))
89 #define F75387_FAN_MANU_MODE(nr)        ((nr) * 4)
90
91 /*
92  * Data structures and manipulation thereof
93  */
94
95 struct f75375_data {
96         unsigned short addr;
97         struct device *hwmon_dev;
98
99         const char *name;
100         int kind;
101         struct mutex update_lock; /* protect register access */
102         char valid;
103         unsigned long last_updated;     /* In jiffies */
104         unsigned long last_limits;      /* In jiffies */
105
106         /* Register values */
107         u8 in[4];
108         u8 in_max[4];
109         u8 in_min[4];
110         u16 fan[2];
111         u16 fan_min[2];
112         u16 fan_max[2];
113         u16 fan_target[2];
114         u8 fan_timer;
115         u8 pwm[2];
116         u8 pwm_mode[2];
117         u8 pwm_enable[2];
118         /*
119          * f75387: For remote temperature reading, it uses signed 11-bit
120          * values with LSB = 0.125 degree Celsius, left-justified in 16-bit
121          * registers. For original 8-bit temp readings, the LSB just is 0.
122          */
123         s16 temp11[2];
124         s8 temp_high[2];
125         s8 temp_max_hyst[2];
126 };
127
128 static int f75375_detect(struct i2c_client *client,
129                          struct i2c_board_info *info);
130 static int f75375_probe(struct i2c_client *client,
131                         const struct i2c_device_id *id);
132 static int f75375_remove(struct i2c_client *client);
133
134 static const struct i2c_device_id f75375_id[] = {
135         { "f75373", f75373 },
136         { "f75375", f75375 },
137         { "f75387", f75387 },
138         { }
139 };
140 MODULE_DEVICE_TABLE(i2c, f75375_id);
141
142 static struct i2c_driver f75375_driver = {
143         .class = I2C_CLASS_HWMON,
144         .driver = {
145                 .name = "f75375",
146         },
147         .probe = f75375_probe,
148         .remove = f75375_remove,
149         .id_table = f75375_id,
150         .detect = f75375_detect,
151         .address_list = normal_i2c,
152 };
153
154 static inline int f75375_read8(struct i2c_client *client, u8 reg)
155 {
156         return i2c_smbus_read_byte_data(client, reg);
157 }
158
159 /* in most cases, should be called while holding update_lock */
160 static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
161 {
162         return (i2c_smbus_read_byte_data(client, reg) << 8)
163                 | i2c_smbus_read_byte_data(client, reg + 1);
164 }
165
166 static inline void f75375_write8(struct i2c_client *client, u8 reg,
167                 u8 value)
168 {
169         i2c_smbus_write_byte_data(client, reg, value);
170 }
171
172 static inline void f75375_write16(struct i2c_client *client, u8 reg,
173                 u16 value)
174 {
175         int err = i2c_smbus_write_byte_data(client, reg, (value >> 8));
176         if (err)
177                 return;
178         i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
179 }
180
181 static void f75375_write_pwm(struct i2c_client *client, int nr)
182 {
183         struct f75375_data *data = i2c_get_clientdata(client);
184         if (data->kind == f75387)
185                 f75375_write16(client, F75375_REG_FAN_EXP(nr), data->pwm[nr]);
186         else
187                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
188                               data->pwm[nr]);
189 }
190
191 static struct f75375_data *f75375_update_device(struct device *dev)
192 {
193         struct i2c_client *client = to_i2c_client(dev);
194         struct f75375_data *data = i2c_get_clientdata(client);
195         int nr;
196
197         mutex_lock(&data->update_lock);
198
199         /* Limit registers cache is refreshed after 60 seconds */
200         if (time_after(jiffies, data->last_limits + 60 * HZ)
201                 || !data->valid) {
202                 for (nr = 0; nr < 2; nr++) {
203                         data->temp_high[nr] =
204                                 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
205                         data->temp_max_hyst[nr] =
206                                 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
207                         data->fan_max[nr] =
208                                 f75375_read16(client, F75375_REG_FAN_FULL(nr));
209                         data->fan_min[nr] =
210                                 f75375_read16(client, F75375_REG_FAN_MIN(nr));
211                         data->fan_target[nr] =
212                                 f75375_read16(client, F75375_REG_FAN_EXP(nr));
213                 }
214                 for (nr = 0; nr < 4; nr++) {
215                         data->in_max[nr] =
216                                 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
217                         data->in_min[nr] =
218                                 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
219                 }
220                 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
221                 data->last_limits = jiffies;
222         }
223
224         /* Measurement registers cache is refreshed after 2 second */
225         if (time_after(jiffies, data->last_updated + 2 * HZ)
226                 || !data->valid) {
227                 for (nr = 0; nr < 2; nr++) {
228                         data->pwm[nr] = f75375_read8(client,
229                                 F75375_REG_FAN_PWM_DUTY(nr));
230                         /* assign MSB, therefore shift it by 8 bits */
231                         data->temp11[nr] =
232                                 f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
233                         if (data->kind == f75387)
234                                 /* merge F75387's temperature LSB (11-bit) */
235                                 data->temp11[nr] |=
236                                         f75375_read8(client,
237                                                      F75387_REG_TEMP11_LSB(nr));
238                         data->fan[nr] =
239                                 f75375_read16(client, F75375_REG_FAN(nr));
240                 }
241                 for (nr = 0; nr < 4; nr++)
242                         data->in[nr] =
243                                 f75375_read8(client, F75375_REG_VOLT(nr));
244
245                 data->last_updated = jiffies;
246                 data->valid = 1;
247         }
248
249         mutex_unlock(&data->update_lock);
250         return data;
251 }
252
253 static inline u16 rpm_from_reg(u16 reg)
254 {
255         if (reg == 0 || reg == 0xffff)
256                 return 0;
257         return 1500000 / reg;
258 }
259
260 static inline u16 rpm_to_reg(int rpm)
261 {
262         if (rpm < 367 || rpm > 0xffff)
263                 return 0xffff;
264         return 1500000 / rpm;
265 }
266
267 static bool duty_mode_enabled(u8 pwm_enable)
268 {
269         switch (pwm_enable) {
270         case 0: /* Manual, duty mode (full speed) */
271         case 1: /* Manual, duty mode */
272         case 4: /* Auto, duty mode */
273                 return true;
274         case 2: /* Auto, speed mode */
275         case 3: /* Manual, speed mode */
276                 return false;
277         default:
278                 BUG();
279                 return true;
280         }
281 }
282
283 static bool auto_mode_enabled(u8 pwm_enable)
284 {
285         switch (pwm_enable) {
286         case 0: /* Manual, duty mode (full speed) */
287         case 1: /* Manual, duty mode */
288         case 3: /* Manual, speed mode */
289                 return false;
290         case 2: /* Auto, speed mode */
291         case 4: /* Auto, duty mode */
292                 return true;
293         default:
294                 BUG();
295                 return false;
296         }
297 }
298
299 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
300                 const char *buf, size_t count)
301 {
302         int nr = to_sensor_dev_attr(attr)->index;
303         struct i2c_client *client = to_i2c_client(dev);
304         struct f75375_data *data = i2c_get_clientdata(client);
305         unsigned long val;
306         int err;
307
308         err = kstrtoul(buf, 10, &val);
309         if (err < 0)
310                 return err;
311
312         mutex_lock(&data->update_lock);
313         data->fan_min[nr] = rpm_to_reg(val);
314         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
315         mutex_unlock(&data->update_lock);
316         return count;
317 }
318
319 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
320                 const char *buf, size_t count)
321 {
322         int nr = to_sensor_dev_attr(attr)->index;
323         struct i2c_client *client = to_i2c_client(dev);
324         struct f75375_data *data = i2c_get_clientdata(client);
325         unsigned long val;
326         int err;
327
328         err = kstrtoul(buf, 10, &val);
329         if (err < 0)
330                 return err;
331
332         if (auto_mode_enabled(data->pwm_enable[nr]))
333                 return -EINVAL;
334         if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
335                 return -EINVAL;
336
337         mutex_lock(&data->update_lock);
338         data->fan_target[nr] = rpm_to_reg(val);
339         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
340         mutex_unlock(&data->update_lock);
341         return count;
342 }
343
344 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
345                 const char *buf, size_t count)
346 {
347         int nr = to_sensor_dev_attr(attr)->index;
348         struct i2c_client *client = to_i2c_client(dev);
349         struct f75375_data *data = i2c_get_clientdata(client);
350         unsigned long val;
351         int err;
352
353         err = kstrtoul(buf, 10, &val);
354         if (err < 0)
355                 return err;
356
357         if (auto_mode_enabled(data->pwm_enable[nr]) ||
358             !duty_mode_enabled(data->pwm_enable[nr]))
359                 return -EINVAL;
360
361         mutex_lock(&data->update_lock);
362         data->pwm[nr] = clamp_val(val, 0, 255);
363         f75375_write_pwm(client, nr);
364         mutex_unlock(&data->update_lock);
365         return count;
366 }
367
368 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
369                 *attr, char *buf)
370 {
371         int nr = to_sensor_dev_attr(attr)->index;
372         struct f75375_data *data = f75375_update_device(dev);
373         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
374 }
375
376 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
377 {
378         struct f75375_data *data = i2c_get_clientdata(client);
379         u8 fanmode;
380
381         if (val < 0 || val > 4)
382                 return -EINVAL;
383
384         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
385         if (data->kind == f75387) {
386                 /* For now, deny dangerous toggling of duty mode */
387                 if (duty_mode_enabled(data->pwm_enable[nr]) !=
388                                 duty_mode_enabled(val))
389                         return -EOPNOTSUPP;
390                 /* clear each fanX_mode bit before setting them properly */
391                 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
392                 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
393                 switch (val) {
394                 case 0: /* full speed */
395                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
396                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
397                         data->pwm[nr] = 255;
398                         break;
399                 case 1: /* PWM */
400                         fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
401                         fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
402                         break;
403                 case 2: /* Automatic, speed mode */
404                         break;
405                 case 3: /* fan speed */
406                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
407                         break;
408                 case 4: /* Automatic, pwm */
409                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
410                         break;
411                 }
412         } else {
413                 /* clear each fanX_mode bit before setting them properly */
414                 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
415                 switch (val) {
416                 case 0: /* full speed */
417                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
418                         data->pwm[nr] = 255;
419                         break;
420                 case 1: /* PWM */
421                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
422                         break;
423                 case 2: /* AUTOMATIC*/
424                         fanmode  |= (1 << FAN_CTRL_MODE(nr));
425                         break;
426                 case 3: /* fan speed */
427                         break;
428                 case 4: /* Automatic pwm */
429                         return -EINVAL;
430                 }
431         }
432
433         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
434         data->pwm_enable[nr] = val;
435         if (val == 0)
436                 f75375_write_pwm(client, nr);
437         return 0;
438 }
439
440 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
441                 const char *buf, size_t count)
442 {
443         int nr = to_sensor_dev_attr(attr)->index;
444         struct i2c_client *client = to_i2c_client(dev);
445         struct f75375_data *data = i2c_get_clientdata(client);
446         unsigned long val;
447         int err;
448
449         err = kstrtoul(buf, 10, &val);
450         if (err < 0)
451                 return err;
452
453         mutex_lock(&data->update_lock);
454         err = set_pwm_enable_direct(client, nr, val);
455         mutex_unlock(&data->update_lock);
456         return err ? err : count;
457 }
458
459 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
460                 const char *buf, size_t count)
461 {
462         int nr = to_sensor_dev_attr(attr)->index;
463         struct i2c_client *client = to_i2c_client(dev);
464         struct f75375_data *data = i2c_get_clientdata(client);
465         unsigned long val;
466         int err;
467         u8 conf;
468         char reg, ctrl;
469
470         err = kstrtoul(buf, 10, &val);
471         if (err < 0)
472                 return err;
473
474         if (!(val == 0 || val == 1))
475                 return -EINVAL;
476
477         /* F75373 does not support DC (linear voltage) fan control mode */
478         if (data->kind == f75373 && val == 0)
479                 return -EINVAL;
480
481         /* take care for different registers */
482         if (data->kind == f75387) {
483                 reg = F75375_REG_FAN_TIMER;
484                 ctrl = F75387_FAN_CTRL_LINEAR(nr);
485         } else {
486                 reg = F75375_REG_CONFIG1;
487                 ctrl = F75375_FAN_CTRL_LINEAR(nr);
488         }
489
490         mutex_lock(&data->update_lock);
491         conf = f75375_read8(client, reg);
492         conf &= ~(1 << ctrl);
493
494         if (val == 0)
495                 conf |= (1 << ctrl);
496
497         f75375_write8(client, reg, conf);
498         data->pwm_mode[nr] = val;
499         mutex_unlock(&data->update_lock);
500         return count;
501 }
502
503 static ssize_t show_pwm(struct device *dev, struct device_attribute
504                 *attr, char *buf)
505 {
506         int nr = to_sensor_dev_attr(attr)->index;
507         struct f75375_data *data = f75375_update_device(dev);
508         return sprintf(buf, "%d\n", data->pwm[nr]);
509 }
510
511 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
512                 *attr, char *buf)
513 {
514         int nr = to_sensor_dev_attr(attr)->index;
515         struct f75375_data *data = f75375_update_device(dev);
516         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
517 }
518
519 #define VOLT_FROM_REG(val) ((val) * 8)
520 #define VOLT_TO_REG(val) ((val) / 8)
521
522 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
523                 char *buf)
524 {
525         int nr = to_sensor_dev_attr(attr)->index;
526         struct f75375_data *data = f75375_update_device(dev);
527         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
528 }
529
530 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
531                 char *buf)
532 {
533         int nr = to_sensor_dev_attr(attr)->index;
534         struct f75375_data *data = f75375_update_device(dev);
535         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
536 }
537
538 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
539                 char *buf)
540 {
541         int nr = to_sensor_dev_attr(attr)->index;
542         struct f75375_data *data = f75375_update_device(dev);
543         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
544 }
545
546 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
547                 const char *buf, size_t count)
548 {
549         int nr = to_sensor_dev_attr(attr)->index;
550         struct i2c_client *client = to_i2c_client(dev);
551         struct f75375_data *data = i2c_get_clientdata(client);
552         unsigned long val;
553         int err;
554
555         err = kstrtoul(buf, 10, &val);
556         if (err < 0)
557                 return err;
558
559         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
560         mutex_lock(&data->update_lock);
561         data->in_max[nr] = val;
562         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
563         mutex_unlock(&data->update_lock);
564         return count;
565 }
566
567 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
568                 const char *buf, size_t count)
569 {
570         int nr = to_sensor_dev_attr(attr)->index;
571         struct i2c_client *client = to_i2c_client(dev);
572         struct f75375_data *data = i2c_get_clientdata(client);
573         unsigned long val;
574         int err;
575
576         err = kstrtoul(buf, 10, &val);
577         if (err < 0)
578                 return err;
579
580         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
581         mutex_lock(&data->update_lock);
582         data->in_min[nr] = val;
583         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
584         mutex_unlock(&data->update_lock);
585         return count;
586 }
587 #define TEMP_FROM_REG(val) ((val) * 1000)
588 #define TEMP_TO_REG(val) ((val) / 1000)
589 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
590
591 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
592                 char *buf)
593 {
594         int nr = to_sensor_dev_attr(attr)->index;
595         struct f75375_data *data = f75375_update_device(dev);
596         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
597 }
598
599 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
600                 char *buf)
601 {
602         int nr = to_sensor_dev_attr(attr)->index;
603         struct f75375_data *data = f75375_update_device(dev);
604         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
605 }
606
607 static ssize_t show_temp_max_hyst(struct device *dev,
608                 struct device_attribute *attr, char *buf)
609 {
610         int nr = to_sensor_dev_attr(attr)->index;
611         struct f75375_data *data = f75375_update_device(dev);
612         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
613 }
614
615 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
616                 const char *buf, size_t count)
617 {
618         int nr = to_sensor_dev_attr(attr)->index;
619         struct i2c_client *client = to_i2c_client(dev);
620         struct f75375_data *data = i2c_get_clientdata(client);
621         unsigned long val;
622         int err;
623
624         err = kstrtoul(buf, 10, &val);
625         if (err < 0)
626                 return err;
627
628         val = clamp_val(TEMP_TO_REG(val), 0, 127);
629         mutex_lock(&data->update_lock);
630         data->temp_high[nr] = val;
631         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
632         mutex_unlock(&data->update_lock);
633         return count;
634 }
635
636 static ssize_t set_temp_max_hyst(struct device *dev,
637         struct device_attribute *attr, const char *buf, size_t count)
638 {
639         int nr = to_sensor_dev_attr(attr)->index;
640         struct i2c_client *client = to_i2c_client(dev);
641         struct f75375_data *data = i2c_get_clientdata(client);
642         unsigned long val;
643         int err;
644
645         err = kstrtoul(buf, 10, &val);
646         if (err < 0)
647                 return err;
648
649         val = clamp_val(TEMP_TO_REG(val), 0, 127);
650         mutex_lock(&data->update_lock);
651         data->temp_max_hyst[nr] = val;
652         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
653                 data->temp_max_hyst[nr]);
654         mutex_unlock(&data->update_lock);
655         return count;
656 }
657
658 #define show_fan(thing) \
659 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
660                         char *buf)\
661 {\
662         int nr = to_sensor_dev_attr(attr)->index;\
663         struct f75375_data *data = f75375_update_device(dev); \
664         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
665 }
666
667 show_fan(fan);
668 show_fan(fan_min);
669 show_fan(fan_max);
670 show_fan(fan_target);
671
672 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
673 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
674         show_in_max, set_in_max, 0);
675 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
676         show_in_min, set_in_min, 0);
677 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
678 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
679         show_in_max, set_in_max, 1);
680 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
681         show_in_min, set_in_min, 1);
682 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
683 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
684         show_in_max, set_in_max, 2);
685 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
686         show_in_min, set_in_min, 2);
687 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
688 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
689         show_in_max, set_in_max, 3);
690 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
691         show_in_min, set_in_min, 3);
692 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
693 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
694         show_temp_max_hyst, set_temp_max_hyst, 0);
695 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
696         show_temp_max, set_temp_max, 0);
697 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
698 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
699         show_temp_max_hyst, set_temp_max_hyst, 1);
700 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
701         show_temp_max, set_temp_max, 1);
702 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
703 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
704 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
705         show_fan_min, set_fan_min, 0);
706 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
707         show_fan_target, set_fan_target, 0);
708 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
709 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
710 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
711         show_fan_min, set_fan_min, 1);
712 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
713         show_fan_target, set_fan_target, 1);
714 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
715         show_pwm, set_pwm, 0);
716 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
717         show_pwm_enable, set_pwm_enable, 0);
718 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
719         show_pwm_mode, set_pwm_mode, 0);
720 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
721         show_pwm, set_pwm, 1);
722 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
723         show_pwm_enable, set_pwm_enable, 1);
724 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
725         show_pwm_mode, set_pwm_mode, 1);
726
727 static struct attribute *f75375_attributes[] = {
728         &sensor_dev_attr_temp1_input.dev_attr.attr,
729         &sensor_dev_attr_temp1_max.dev_attr.attr,
730         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
731         &sensor_dev_attr_temp2_input.dev_attr.attr,
732         &sensor_dev_attr_temp2_max.dev_attr.attr,
733         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
734         &sensor_dev_attr_fan1_input.dev_attr.attr,
735         &sensor_dev_attr_fan1_max.dev_attr.attr,
736         &sensor_dev_attr_fan1_min.dev_attr.attr,
737         &sensor_dev_attr_fan1_target.dev_attr.attr,
738         &sensor_dev_attr_fan2_input.dev_attr.attr,
739         &sensor_dev_attr_fan2_max.dev_attr.attr,
740         &sensor_dev_attr_fan2_min.dev_attr.attr,
741         &sensor_dev_attr_fan2_target.dev_attr.attr,
742         &sensor_dev_attr_pwm1.dev_attr.attr,
743         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
744         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
745         &sensor_dev_attr_pwm2.dev_attr.attr,
746         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
747         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
748         &sensor_dev_attr_in0_input.dev_attr.attr,
749         &sensor_dev_attr_in0_max.dev_attr.attr,
750         &sensor_dev_attr_in0_min.dev_attr.attr,
751         &sensor_dev_attr_in1_input.dev_attr.attr,
752         &sensor_dev_attr_in1_max.dev_attr.attr,
753         &sensor_dev_attr_in1_min.dev_attr.attr,
754         &sensor_dev_attr_in2_input.dev_attr.attr,
755         &sensor_dev_attr_in2_max.dev_attr.attr,
756         &sensor_dev_attr_in2_min.dev_attr.attr,
757         &sensor_dev_attr_in3_input.dev_attr.attr,
758         &sensor_dev_attr_in3_max.dev_attr.attr,
759         &sensor_dev_attr_in3_min.dev_attr.attr,
760         NULL
761 };
762
763 static const struct attribute_group f75375_group = {
764         .attrs = f75375_attributes,
765 };
766
767 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
768                 struct f75375s_platform_data *f75375s_pdata)
769 {
770         int nr;
771
772         if (!f75375s_pdata) {
773                 u8 conf, mode;
774                 int nr;
775
776                 conf = f75375_read8(client, F75375_REG_CONFIG1);
777                 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
778                 for (nr = 0; nr < 2; nr++) {
779                         if (data->kind == f75387) {
780                                 bool manu, duty;
781
782                                 if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
783                                         data->pwm_mode[nr] = 1;
784
785                                 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
786                                 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
787                                 if (!manu && duty)
788                                         /* auto, pwm */
789                                         data->pwm_enable[nr] = 4;
790                                 else if (manu && !duty)
791                                         /* manual, speed */
792                                         data->pwm_enable[nr] = 3;
793                                 else if (!manu && !duty)
794                                         /* automatic, speed */
795                                         data->pwm_enable[nr] = 2;
796                                 else
797                                         /* manual, pwm */
798                                         data->pwm_enable[nr] = 1;
799                         } else {
800                                 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
801                                         data->pwm_mode[nr] = 1;
802
803                                 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
804                                 case 0:         /* speed */
805                                         data->pwm_enable[nr] = 3;
806                                         break;
807                                 case 1:         /* automatic */
808                                         data->pwm_enable[nr] = 2;
809                                         break;
810                                 default:        /* manual */
811                                         data->pwm_enable[nr] = 1;
812                                         break;
813                                 }
814                         }
815                 }
816                 return;
817         }
818
819         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
820         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
821         for (nr = 0; nr < 2; nr++) {
822                 if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
823                     !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
824                         continue;
825                 data->pwm[nr] = clamp_val(f75375s_pdata->pwm[nr], 0, 255);
826                 f75375_write_pwm(client, nr);
827         }
828
829 }
830
831 static int f75375_probe(struct i2c_client *client,
832                 const struct i2c_device_id *id)
833 {
834         struct f75375_data *data;
835         struct f75375s_platform_data *f75375s_pdata = client->dev.platform_data;
836         int err;
837
838         if (!i2c_check_functionality(client->adapter,
839                                 I2C_FUNC_SMBUS_BYTE_DATA))
840                 return -EIO;
841         data = devm_kzalloc(&client->dev, sizeof(struct f75375_data),
842                             GFP_KERNEL);
843         if (!data)
844                 return -ENOMEM;
845
846         i2c_set_clientdata(client, data);
847         mutex_init(&data->update_lock);
848         data->kind = id->driver_data;
849
850         err = sysfs_create_group(&client->dev.kobj, &f75375_group);
851         if (err)
852                 return err;
853
854         if (data->kind != f75373) {
855                 err = sysfs_chmod_file(&client->dev.kobj,
856                         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
857                         S_IRUGO | S_IWUSR);
858                 if (err)
859                         goto exit_remove;
860                 err = sysfs_chmod_file(&client->dev.kobj,
861                         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
862                         S_IRUGO | S_IWUSR);
863                 if (err)
864                         goto exit_remove;
865         }
866
867         data->hwmon_dev = hwmon_device_register(&client->dev);
868         if (IS_ERR(data->hwmon_dev)) {
869                 err = PTR_ERR(data->hwmon_dev);
870                 goto exit_remove;
871         }
872
873         f75375_init(client, data, f75375s_pdata);
874
875         return 0;
876
877 exit_remove:
878         sysfs_remove_group(&client->dev.kobj, &f75375_group);
879         return err;
880 }
881
882 static int f75375_remove(struct i2c_client *client)
883 {
884         struct f75375_data *data = i2c_get_clientdata(client);
885         hwmon_device_unregister(data->hwmon_dev);
886         sysfs_remove_group(&client->dev.kobj, &f75375_group);
887         return 0;
888 }
889
890 /* Return 0 if detection is successful, -ENODEV otherwise */
891 static int f75375_detect(struct i2c_client *client,
892                          struct i2c_board_info *info)
893 {
894         struct i2c_adapter *adapter = client->adapter;
895         u16 vendid, chipid;
896         u8 version;
897         const char *name;
898
899         vendid = f75375_read16(client, F75375_REG_VENDOR);
900         chipid = f75375_read16(client, F75375_CHIP_ID);
901         if (vendid != 0x1934)
902                 return -ENODEV;
903
904         if (chipid == 0x0306)
905                 name = "f75375";
906         else if (chipid == 0x0204)
907                 name = "f75373";
908         else if (chipid == 0x0410)
909                 name = "f75387";
910         else
911                 return -ENODEV;
912
913         version = f75375_read8(client, F75375_REG_VERSION);
914         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
915         strlcpy(info->type, name, I2C_NAME_SIZE);
916
917         return 0;
918 }
919
920 module_i2c_driver(f75375_driver);
921
922 MODULE_AUTHOR("Riku Voipio");
923 MODULE_LICENSE("GPL");
924 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");