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1/*
2 * f75375s.c - driver for the Fintek F75375/SP and F75373
3 * 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 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 */
29
30#include <linux/module.h>
31#include <linux/jiffies.h>
32#include <linux/hwmon.h>
33#include <linux/hwmon-sysfs.h>
34#include <linux/i2c.h>
35#include <linux/err.h>
36#include <linux/mutex.h>
37#include <linux/f75375s.h>
38#include <linux/slab.h>
39
40/* Addresses to scan */
41static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
42
43enum chips { f75373, f75375 };
44
45/* Fintek F75375 registers */
46#define F75375_REG_CONFIG0 0x0
47#define F75375_REG_CONFIG1 0x1
48#define F75375_REG_CONFIG2 0x2
49#define F75375_REG_CONFIG3 0x3
50#define F75375_REG_ADDR 0x4
51#define F75375_REG_INTR 0x31
52#define F75375_CHIP_ID 0x5A
53#define F75375_REG_VERSION 0x5C
54#define F75375_REG_VENDOR 0x5D
55#define F75375_REG_FAN_TIMER 0x60
56
57#define F75375_REG_VOLT(nr) (0x10 + (nr))
58#define F75375_REG_VOLT_HIGH(nr) (0x20 + (nr) * 2)
59#define F75375_REG_VOLT_LOW(nr) (0x21 + (nr) * 2)
60
61#define F75375_REG_TEMP(nr) (0x14 + (nr))
62#define F75375_REG_TEMP_HIGH(nr) (0x28 + (nr) * 2)
63#define F75375_REG_TEMP_HYST(nr) (0x29 + (nr) * 2)
64
65#define F75375_REG_FAN(nr) (0x16 + (nr) * 2)
66#define F75375_REG_FAN_MIN(nr) (0x2C + (nr) * 2)
67#define F75375_REG_FAN_FULL(nr) (0x70 + (nr) * 0x10)
68#define F75375_REG_FAN_PWM_DUTY(nr) (0x76 + (nr) * 0x10)
69#define F75375_REG_FAN_PWM_CLOCK(nr) (0x7D + (nr) * 0x10)
70
71#define F75375_REG_FAN_EXP(nr) (0x74 + (nr) * 0x10)
72#define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
73#define F75375_REG_FAN_B_SPEED(nr, step) \
74 ((0xA5 + (nr) * 0x10) + (step) * 2)
75
76#define F75375_REG_PWM1_RAISE_DUTY 0x69
77#define F75375_REG_PWM2_RAISE_DUTY 0x6A
78#define F75375_REG_PWM1_DROP_DUTY 0x6B
79#define F75375_REG_PWM2_DROP_DUTY 0x6C
80
81#define FAN_CTRL_LINEAR(nr) (4 + nr)
82#define FAN_CTRL_MODE(nr) (4 + ((nr) * 2))
83
84/*
85 * Data structures and manipulation thereof
86 */
87
88struct f75375_data {
89 unsigned short addr;
90 struct device *hwmon_dev;
91
92 const char *name;
93 int kind;
94 struct mutex update_lock; /* protect register access */
95 char valid;
96 unsigned long last_updated; /* In jiffies */
97 unsigned long last_limits; /* In jiffies */
98
99 /* Register values */
100 u8 in[4];
101 u8 in_max[4];
102 u8 in_min[4];
103 u16 fan[2];
104 u16 fan_min[2];
105 u16 fan_full[2];
106 u16 fan_exp[2];
107 u8 fan_timer;
108 u8 pwm[2];
109 u8 pwm_mode[2];
110 u8 pwm_enable[2];
111 s8 temp[2];
112 s8 temp_high[2];
113 s8 temp_max_hyst[2];
114};
115
116static int f75375_detect(struct i2c_client *client,
117 struct i2c_board_info *info);
118static int f75375_probe(struct i2c_client *client,
119 const struct i2c_device_id *id);
120static int f75375_remove(struct i2c_client *client);
121
122static const struct i2c_device_id f75375_id[] = {
123 { "f75373", f75373 },
124 { "f75375", f75375 },
125 { }
126};
127MODULE_DEVICE_TABLE(i2c, f75375_id);
128
129static struct i2c_driver f75375_driver = {
130 .class = I2C_CLASS_HWMON,
131 .driver = {
132 .name = "f75375",
133 },
134 .probe = f75375_probe,
135 .remove = f75375_remove,
136 .id_table = f75375_id,
137 .detect = f75375_detect,
138 .address_list = normal_i2c,
139};
140
141static inline int f75375_read8(struct i2c_client *client, u8 reg)
142{
143 return i2c_smbus_read_byte_data(client, reg);
144}
145
146/* in most cases, should be called while holding update_lock */
147static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
148{
149 return ((i2c_smbus_read_byte_data(client, reg) << 8)
150 | i2c_smbus_read_byte_data(client, reg + 1));
151}
152
153static inline void f75375_write8(struct i2c_client *client, u8 reg,
154 u8 value)
155{
156 i2c_smbus_write_byte_data(client, reg, value);
157}
158
159static inline void f75375_write16(struct i2c_client *client, u8 reg,
160 u16 value)
161{
162 int err = i2c_smbus_write_byte_data(client, reg, (value << 8));
163 if (err)
164 return;
165 i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
166}
167
168static struct f75375_data *f75375_update_device(struct device *dev)
169{
170 struct i2c_client *client = to_i2c_client(dev);
171 struct f75375_data *data = i2c_get_clientdata(client);
172 int nr;
173
174 mutex_lock(&data->update_lock);
175
176 /* Limit registers cache is refreshed after 60 seconds */
177 if (time_after(jiffies, data->last_limits + 60 * HZ)
178 || !data->valid) {
179 for (nr = 0; nr < 2; nr++) {
180 data->temp_high[nr] =
181 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
182 data->temp_max_hyst[nr] =
183 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
184 data->fan_full[nr] =
185 f75375_read16(client, F75375_REG_FAN_FULL(nr));
186 data->fan_min[nr] =
187 f75375_read16(client, F75375_REG_FAN_MIN(nr));
188 data->fan_exp[nr] =
189 f75375_read16(client, F75375_REG_FAN_EXP(nr));
190 data->pwm[nr] = f75375_read8(client,
191 F75375_REG_FAN_PWM_DUTY(nr));
192
193 }
194 for (nr = 0; nr < 4; nr++) {
195 data->in_max[nr] =
196 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
197 data->in_min[nr] =
198 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
199 }
200 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
201 data->last_limits = jiffies;
202 }
203
204 /* Measurement registers cache is refreshed after 2 second */
205 if (time_after(jiffies, data->last_updated + 2 * HZ)
206 || !data->valid) {
207 for (nr = 0; nr < 2; nr++) {
208 data->temp[nr] =
209 f75375_read8(client, F75375_REG_TEMP(nr));
210 data->fan[nr] =
211 f75375_read16(client, F75375_REG_FAN(nr));
212 }
213 for (nr = 0; nr < 4; nr++)
214 data->in[nr] =
215 f75375_read8(client, F75375_REG_VOLT(nr));
216
217 data->last_updated = jiffies;
218 data->valid = 1;
219 }
220
221 mutex_unlock(&data->update_lock);
222 return data;
223}
224
225static inline u16 rpm_from_reg(u16 reg)
226{
227 if (reg == 0 || reg == 0xffff)
228 return 0;
229 return (1500000 / reg);
230}
231
232static inline u16 rpm_to_reg(int rpm)
233{
234 if (rpm < 367 || rpm > 0xffff)
235 return 0xffff;
236 return (1500000 / rpm);
237}
238
239static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
240 const char *buf, size_t count)
241{
242 int nr = to_sensor_dev_attr(attr)->index;
243 struct i2c_client *client = to_i2c_client(dev);
244 struct f75375_data *data = i2c_get_clientdata(client);
245 int val = simple_strtoul(buf, NULL, 10);
246
247 mutex_lock(&data->update_lock);
248 data->fan_min[nr] = rpm_to_reg(val);
249 f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
250 mutex_unlock(&data->update_lock);
251 return count;
252}
253
254static ssize_t set_fan_exp(struct device *dev, struct device_attribute *attr,
255 const char *buf, size_t count)
256{
257 int nr = to_sensor_dev_attr(attr)->index;
258 struct i2c_client *client = to_i2c_client(dev);
259 struct f75375_data *data = i2c_get_clientdata(client);
260 int val = simple_strtoul(buf, NULL, 10);
261
262 mutex_lock(&data->update_lock);
263 data->fan_exp[nr] = rpm_to_reg(val);
264 f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_exp[nr]);
265 mutex_unlock(&data->update_lock);
266 return count;
267}
268
269static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
270 const char *buf, size_t count)
271{
272 int nr = to_sensor_dev_attr(attr)->index;
273 struct i2c_client *client = to_i2c_client(dev);
274 struct f75375_data *data = i2c_get_clientdata(client);
275 int val = simple_strtoul(buf, NULL, 10);
276
277 mutex_lock(&data->update_lock);
278 data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
279 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr), data->pwm[nr]);
280 mutex_unlock(&data->update_lock);
281 return count;
282}
283
284static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
285 *attr, char *buf)
286{
287 int nr = to_sensor_dev_attr(attr)->index;
288 struct f75375_data *data = f75375_update_device(dev);
289 return sprintf(buf, "%d\n", data->pwm_enable[nr]);
290}
291
292static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
293{
294 struct f75375_data *data = i2c_get_clientdata(client);
295 u8 fanmode;
296
297 if (val < 0 || val > 4)
298 return -EINVAL;
299
300 fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
301 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
302
303 switch (val) {
304 case 0: /* Full speed */
305 fanmode |= (3 << FAN_CTRL_MODE(nr));
306 data->pwm[nr] = 255;
307 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
308 data->pwm[nr]);
309 break;
310 case 1: /* PWM */
311 fanmode |= (3 << FAN_CTRL_MODE(nr));
312 break;
313 case 2: /* AUTOMATIC*/
314 fanmode |= (2 << FAN_CTRL_MODE(nr));
315 break;
316 case 3: /* fan speed */
317 break;
318 }
319 f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
320 data->pwm_enable[nr] = val;
321 return 0;
322}
323
324static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
325 const char *buf, size_t count)
326{
327 int nr = to_sensor_dev_attr(attr)->index;
328 struct i2c_client *client = to_i2c_client(dev);
329 struct f75375_data *data = i2c_get_clientdata(client);
330 int val = simple_strtoul(buf, NULL, 10);
331 int err = 0;
332
333 mutex_lock(&data->update_lock);
334 err = set_pwm_enable_direct(client, nr, val);
335 mutex_unlock(&data->update_lock);
336 return err ? err : count;
337}
338
339static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
340 const char *buf, size_t count)
341{
342 int nr = to_sensor_dev_attr(attr)->index;
343 struct i2c_client *client = to_i2c_client(dev);
344 struct f75375_data *data = i2c_get_clientdata(client);
345 int val = simple_strtoul(buf, NULL, 10);
346 u8 conf = 0;
347
348 if (!(val == 0 || val == 1))
349 return -EINVAL;
350
351 mutex_lock(&data->update_lock);
352 conf = f75375_read8(client, F75375_REG_CONFIG1);
353 conf &= ~(1 << FAN_CTRL_LINEAR(nr));
354
355 if (val == 0)
356 conf |= (1 << FAN_CTRL_LINEAR(nr)) ;
357
358 f75375_write8(client, F75375_REG_CONFIG1, conf);
359 data->pwm_mode[nr] = val;
360 mutex_unlock(&data->update_lock);
361 return count;
362}
363
364static ssize_t show_pwm(struct device *dev, struct device_attribute
365 *attr, char *buf)
366{
367 int nr = to_sensor_dev_attr(attr)->index;
368 struct f75375_data *data = f75375_update_device(dev);
369 return sprintf(buf, "%d\n", data->pwm[nr]);
370}
371
372static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
373 *attr, char *buf)
374{
375 int nr = to_sensor_dev_attr(attr)->index;
376 struct f75375_data *data = f75375_update_device(dev);
377 return sprintf(buf, "%d\n", data->pwm_mode[nr]);
378}
379
380#define VOLT_FROM_REG(val) ((val) * 8)
381#define VOLT_TO_REG(val) ((val) / 8)
382
383static ssize_t show_in(struct device *dev, struct device_attribute *attr,
384 char *buf)
385{
386 int nr = to_sensor_dev_attr(attr)->index;
387 struct f75375_data *data = f75375_update_device(dev);
388 return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
389}
390
391static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
392 char *buf)
393{
394 int nr = to_sensor_dev_attr(attr)->index;
395 struct f75375_data *data = f75375_update_device(dev);
396 return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
397}
398
399static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
400 char *buf)
401{
402 int nr = to_sensor_dev_attr(attr)->index;
403 struct f75375_data *data = f75375_update_device(dev);
404 return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
405}
406
407static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
408 const char *buf, size_t count)
409{
410 int nr = to_sensor_dev_attr(attr)->index;
411 struct i2c_client *client = to_i2c_client(dev);
412 struct f75375_data *data = i2c_get_clientdata(client);
413 int val = simple_strtoul(buf, NULL, 10);
414 val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
415 mutex_lock(&data->update_lock);
416 data->in_max[nr] = val;
417 f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
418 mutex_unlock(&data->update_lock);
419 return count;
420}
421
422static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
423 const char *buf, size_t count)
424{
425 int nr = to_sensor_dev_attr(attr)->index;
426 struct i2c_client *client = to_i2c_client(dev);
427 struct f75375_data *data = i2c_get_clientdata(client);
428 int val = simple_strtoul(buf, NULL, 10);
429 val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
430 mutex_lock(&data->update_lock);
431 data->in_min[nr] = val;
432 f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
433 mutex_unlock(&data->update_lock);
434 return count;
435}
436#define TEMP_FROM_REG(val) ((val) * 1000)
437#define TEMP_TO_REG(val) ((val) / 1000)
438
439static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
440 char *buf)
441{
442 int nr = to_sensor_dev_attr(attr)->index;
443 struct f75375_data *data = f75375_update_device(dev);
444 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
445}
446
447static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
448 char *buf)
449{
450 int nr = to_sensor_dev_attr(attr)->index;
451 struct f75375_data *data = f75375_update_device(dev);
452 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
453}
454
455static ssize_t show_temp_max_hyst(struct device *dev,
456 struct device_attribute *attr, char *buf)
457{
458 int nr = to_sensor_dev_attr(attr)->index;
459 struct f75375_data *data = f75375_update_device(dev);
460 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
461}
462
463static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
464 const char *buf, size_t count)
465{
466 int nr = to_sensor_dev_attr(attr)->index;
467 struct i2c_client *client = to_i2c_client(dev);
468 struct f75375_data *data = i2c_get_clientdata(client);
469 int val = simple_strtol(buf, NULL, 10);
470 val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
471 mutex_lock(&data->update_lock);
472 data->temp_high[nr] = val;
473 f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
474 mutex_unlock(&data->update_lock);
475 return count;
476}
477
478static ssize_t set_temp_max_hyst(struct device *dev,
479 struct device_attribute *attr, const char *buf, size_t count)
480{
481 int nr = to_sensor_dev_attr(attr)->index;
482 struct i2c_client *client = to_i2c_client(dev);
483 struct f75375_data *data = i2c_get_clientdata(client);
484 int val = simple_strtol(buf, NULL, 10);
485 val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
486 mutex_lock(&data->update_lock);
487 data->temp_max_hyst[nr] = val;
488 f75375_write8(client, F75375_REG_TEMP_HYST(nr),
489 data->temp_max_hyst[nr]);
490 mutex_unlock(&data->update_lock);
491 return count;
492}
493
494#define show_fan(thing) \
495static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
496 char *buf)\
497{\
498 int nr = to_sensor_dev_attr(attr)->index;\
499 struct f75375_data *data = f75375_update_device(dev); \
500 return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
501}
502
503show_fan(fan);
504show_fan(fan_min);
505show_fan(fan_full);
506show_fan(fan_exp);
507
508static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
509static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
510 show_in_max, set_in_max, 0);
511static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
512 show_in_min, set_in_min, 0);
513static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
514static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
515 show_in_max, set_in_max, 1);
516static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
517 show_in_min, set_in_min, 1);
518static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
519static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
520 show_in_max, set_in_max, 2);
521static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
522 show_in_min, set_in_min, 2);
523static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
524static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
525 show_in_max, set_in_max, 3);
526static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
527 show_in_min, set_in_min, 3);
528static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
529static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
530 show_temp_max_hyst, set_temp_max_hyst, 0);
531static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
532 show_temp_max, set_temp_max, 0);
533static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
534static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
535 show_temp_max_hyst, set_temp_max_hyst, 1);
536static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
537 show_temp_max, set_temp_max, 1);
538static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
539static SENSOR_DEVICE_ATTR(fan1_full, S_IRUGO, show_fan_full, NULL, 0);
540static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
541 show_fan_min, set_fan_min, 0);
542static SENSOR_DEVICE_ATTR(fan1_exp, S_IRUGO|S_IWUSR,
543 show_fan_exp, set_fan_exp, 0);
544static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
545static SENSOR_DEVICE_ATTR(fan2_full, S_IRUGO, show_fan_full, NULL, 1);
546static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
547 show_fan_min, set_fan_min, 1);
548static SENSOR_DEVICE_ATTR(fan2_exp, S_IRUGO|S_IWUSR,
549 show_fan_exp, set_fan_exp, 1);
550static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
551 show_pwm, set_pwm, 0);
552static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
553 show_pwm_enable, set_pwm_enable, 0);
554static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
555 show_pwm_mode, set_pwm_mode, 0);
556static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
557 show_pwm, set_pwm, 1);
558static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
559 show_pwm_enable, set_pwm_enable, 1);
560static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
561 show_pwm_mode, set_pwm_mode, 1);
562
563static struct attribute *f75375_attributes[] = {
564 &sensor_dev_attr_temp1_input.dev_attr.attr,
565 &sensor_dev_attr_temp1_max.dev_attr.attr,
566 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
567 &sensor_dev_attr_temp2_input.dev_attr.attr,
568 &sensor_dev_attr_temp2_max.dev_attr.attr,
569 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
570 &sensor_dev_attr_fan1_input.dev_attr.attr,
571 &sensor_dev_attr_fan1_full.dev_attr.attr,
572 &sensor_dev_attr_fan1_min.dev_attr.attr,
573 &sensor_dev_attr_fan1_exp.dev_attr.attr,
574 &sensor_dev_attr_fan2_input.dev_attr.attr,
575 &sensor_dev_attr_fan2_full.dev_attr.attr,
576 &sensor_dev_attr_fan2_min.dev_attr.attr,
577 &sensor_dev_attr_fan2_exp.dev_attr.attr,
578 &sensor_dev_attr_pwm1.dev_attr.attr,
579 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
580 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
581 &sensor_dev_attr_pwm2.dev_attr.attr,
582 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
583 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
584 &sensor_dev_attr_in0_input.dev_attr.attr,
585 &sensor_dev_attr_in0_max.dev_attr.attr,
586 &sensor_dev_attr_in0_min.dev_attr.attr,
587 &sensor_dev_attr_in1_input.dev_attr.attr,
588 &sensor_dev_attr_in1_max.dev_attr.attr,
589 &sensor_dev_attr_in1_min.dev_attr.attr,
590 &sensor_dev_attr_in2_input.dev_attr.attr,
591 &sensor_dev_attr_in2_max.dev_attr.attr,
592 &sensor_dev_attr_in2_min.dev_attr.attr,
593 &sensor_dev_attr_in3_input.dev_attr.attr,
594 &sensor_dev_attr_in3_max.dev_attr.attr,
595 &sensor_dev_attr_in3_min.dev_attr.attr,
596 NULL
597};
598
599static const struct attribute_group f75375_group = {
600 .attrs = f75375_attributes,
601};
602
603static void f75375_init(struct i2c_client *client, struct f75375_data *data,
604 struct f75375s_platform_data *f75375s_pdata)
605{
606 int nr;
607 set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
608 set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
609 for (nr = 0; nr < 2; nr++) {
610 data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
611 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
612 data->pwm[nr]);
613 }
614
615}
616
617static int f75375_probe(struct i2c_client *client,
618 const struct i2c_device_id *id)
619{
620 struct f75375_data *data;
621 struct f75375s_platform_data *f75375s_pdata = client->dev.platform_data;
622 int err;
623
624 if (!i2c_check_functionality(client->adapter,
625 I2C_FUNC_SMBUS_BYTE_DATA))
626 return -EIO;
627 if (!(data = kzalloc(sizeof(struct f75375_data), GFP_KERNEL)))
628 return -ENOMEM;
629
630 i2c_set_clientdata(client, data);
631 mutex_init(&data->update_lock);
632 data->kind = id->driver_data;
633
634 if ((err = sysfs_create_group(&client->dev.kobj, &f75375_group)))
635 goto exit_free;
636
637 if (data->kind == f75375) {
638 err = sysfs_chmod_file(&client->dev.kobj,
639 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
640 S_IRUGO | S_IWUSR);
641 if (err)
642 goto exit_remove;
643 err = sysfs_chmod_file(&client->dev.kobj,
644 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
645 S_IRUGO | S_IWUSR);
646 if (err)
647 goto exit_remove;
648 }
649
650 data->hwmon_dev = hwmon_device_register(&client->dev);
651 if (IS_ERR(data->hwmon_dev)) {
652 err = PTR_ERR(data->hwmon_dev);
653 goto exit_remove;
654 }
655
656 if (f75375s_pdata != NULL)
657 f75375_init(client, data, f75375s_pdata);
658
659 return 0;
660
661exit_remove:
662 sysfs_remove_group(&client->dev.kobj, &f75375_group);
663exit_free:
664 kfree(data);
665 return err;
666}
667
668static int f75375_remove(struct i2c_client *client)
669{
670 struct f75375_data *data = i2c_get_clientdata(client);
671 hwmon_device_unregister(data->hwmon_dev);
672 sysfs_remove_group(&client->dev.kobj, &f75375_group);
673 kfree(data);
674 return 0;
675}
676
677/* Return 0 if detection is successful, -ENODEV otherwise */
678static int f75375_detect(struct i2c_client *client,
679 struct i2c_board_info *info)
680{
681 struct i2c_adapter *adapter = client->adapter;
682 u16 vendid, chipid;
683 u8 version;
684 const char *name;
685
686 vendid = f75375_read16(client, F75375_REG_VENDOR);
687 chipid = f75375_read16(client, F75375_CHIP_ID);
688 if (chipid == 0x0306 && vendid == 0x1934)
689 name = "f75375";
690 else if (chipid == 0x0204 && vendid == 0x1934)
691 name = "f75373";
692 else
693 return -ENODEV;
694
695 version = f75375_read8(client, F75375_REG_VERSION);
696 dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
697 strlcpy(info->type, name, I2C_NAME_SIZE);
698
699 return 0;
700}
701
702static int __init sensors_f75375_init(void)
703{
704 return i2c_add_driver(&f75375_driver);
705}
706
707static void __exit sensors_f75375_exit(void)
708{
709 i2c_del_driver(&f75375_driver);
710}
711
712MODULE_AUTHOR("Riku Voipio");
713MODULE_LICENSE("GPL");
714MODULE_DESCRIPTION("F75373/F75375 hardware monitoring driver");
715
716module_init(sensors_f75375_init);
717module_exit(sensors_f75375_exit);
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 */
30static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
31
32enum 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
81struct 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
114static 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 */
120static 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
126static 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
132static 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
141static 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
151static 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
213static inline u16 rpm_from_reg(u16 reg)
214{
215 if (reg == 0 || reg == 0xffff)
216 return 0;
217 return 1500000 / reg;
218}
219
220static inline u16 rpm_to_reg(int rpm)
221{
222 if (rpm < 367 || rpm > 0xffff)
223 return 0xffff;
224 return 1500000 / rpm;
225}
226
227static 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
243static 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
259static 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
279static 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
304static 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
328static 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
336static 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
400static 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
419static 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
463static 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
471static 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
482static 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
490static 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
498static 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
506static 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
527static 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
551static 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
559static 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
567static 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
575static 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
596static 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) \
619static 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
627show_fan(fan);
628show_fan(fan_min);
629show_fan(fan_max);
630show_fan(fan_target);
631
632static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
633static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
634 show_in_max, set_in_max, 0);
635static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
636 show_in_min, set_in_min, 0);
637static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
638static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
639 show_in_max, set_in_max, 1);
640static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
641 show_in_min, set_in_min, 1);
642static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
643static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
644 show_in_max, set_in_max, 2);
645static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
646 show_in_min, set_in_min, 2);
647static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
648static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
649 show_in_max, set_in_max, 3);
650static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
651 show_in_min, set_in_min, 3);
652static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
653static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
654 show_temp_max_hyst, set_temp_max_hyst, 0);
655static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
656 show_temp_max, set_temp_max, 0);
657static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
658static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
659 show_temp_max_hyst, set_temp_max_hyst, 1);
660static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
661 show_temp_max, set_temp_max, 1);
662static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
663static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
664static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
665 show_fan_min, set_fan_min, 0);
666static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
667 show_fan_target, set_fan_target, 0);
668static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
669static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
670static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
671 show_fan_min, set_fan_min, 1);
672static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
673 show_fan_target, set_fan_target, 1);
674static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
675 show_pwm, set_pwm, 0);
676static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
677 show_pwm_enable, set_pwm_enable, 0);
678static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
679 show_pwm_mode, set_pwm_mode, 0);
680static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
681 show_pwm, set_pwm, 1);
682static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
683 show_pwm_enable, set_pwm_enable, 1);
684static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
685 show_pwm_mode, set_pwm_mode, 1);
686
687static 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
723static const struct attribute_group f75375_group = {
724 .attrs = f75375_attributes,
725};
726
727static 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
791static 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
837exit_remove:
838 sysfs_remove_group(&client->dev.kobj, &f75375_group);
839 return err;
840}
841
842static 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 */
850static 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
879static const struct i2c_device_id f75375_id[] = {
880 { "f75373", f75373 },
881 { "f75375", f75375 },
882 { "f75387", f75387 },
883 { }
884};
885MODULE_DEVICE_TABLE(i2c, f75375_id);
886
887static 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};
898module_i2c_driver(f75375_driver);
899
900MODULE_AUTHOR("Riku Voipio");
901MODULE_LICENSE("GPL");
902MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");