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 */
 44static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
 45
 46enum 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
 95struct 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
128static int f75375_detect(struct i2c_client *client,
129			 struct i2c_board_info *info);
130static int f75375_probe(struct i2c_client *client,
131			const struct i2c_device_id *id);
132static int f75375_remove(struct i2c_client *client);
133
134static const struct i2c_device_id f75375_id[] = {
135	{ "f75373", f75373 },
136	{ "f75375", f75375 },
137	{ "f75387", f75387 },
138	{ }
139};
140MODULE_DEVICE_TABLE(i2c, f75375_id);
141
142static 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
154static 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 */
160static 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
166static 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
172static 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
181static 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
191static 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
253static inline u16 rpm_from_reg(u16 reg)
254{
255	if (reg == 0 || reg == 0xffff)
256		return 0;
257	return 1500000 / reg;
258}
259
260static inline u16 rpm_to_reg(int rpm)
261{
262	if (rpm < 367 || rpm > 0xffff)
263		return 0xffff;
264	return 1500000 / rpm;
265}
266
267static 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		WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
279		return true;
280	}
281}
282
283static 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		WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
295		return false;
296	}
297}
298
299static 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
319static 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
344static 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
368static 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
376static 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
440static 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
459static 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
503static 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
511static 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
522static 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
530static 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
538static 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
546static 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
567static 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
591static 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
599static 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
607static 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
615static 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
636static 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) \
659static 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
667show_fan(fan);
668show_fan(fan_min);
669show_fan(fan_max);
670show_fan(fan_target);
671
672static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
673static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
674	show_in_max, set_in_max, 0);
675static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
676	show_in_min, set_in_min, 0);
677static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
678static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
679	show_in_max, set_in_max, 1);
680static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
681	show_in_min, set_in_min, 1);
682static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
683static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
684	show_in_max, set_in_max, 2);
685static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
686	show_in_min, set_in_min, 2);
687static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
688static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
689	show_in_max, set_in_max, 3);
690static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
691	show_in_min, set_in_min, 3);
692static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
693static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
694	show_temp_max_hyst, set_temp_max_hyst, 0);
695static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
696	show_temp_max, set_temp_max, 0);
697static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
698static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
699	show_temp_max_hyst, set_temp_max_hyst, 1);
700static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
701	show_temp_max, set_temp_max, 1);
702static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
703static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
704static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
705	show_fan_min, set_fan_min, 0);
706static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
707	show_fan_target, set_fan_target, 0);
708static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
709static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
710static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
711	show_fan_min, set_fan_min, 1);
712static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
713	show_fan_target, set_fan_target, 1);
714static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
715	show_pwm, set_pwm, 0);
716static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
717	show_pwm_enable, set_pwm_enable, 0);
718static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
719	show_pwm_mode, set_pwm_mode, 0);
720static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
721	show_pwm, set_pwm, 1);
722static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
723	show_pwm_enable, set_pwm_enable, 1);
724static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
725	show_pwm_mode, set_pwm_mode, 1);
726
727static 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
763static const struct attribute_group f75375_group = {
764	.attrs = f75375_attributes,
765};
766
767static 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
831static 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 =
836			dev_get_platdata(&client->dev);
837	int err;
838
839	if (!i2c_check_functionality(client->adapter,
840				I2C_FUNC_SMBUS_BYTE_DATA))
841		return -EIO;
842	data = devm_kzalloc(&client->dev, sizeof(struct f75375_data),
843			    GFP_KERNEL);
844	if (!data)
845		return -ENOMEM;
846
847	i2c_set_clientdata(client, data);
848	mutex_init(&data->update_lock);
849	data->kind = id->driver_data;
850
851	err = sysfs_create_group(&client->dev.kobj, &f75375_group);
852	if (err)
853		return err;
854
855	if (data->kind != f75373) {
856		err = sysfs_chmod_file(&client->dev.kobj,
857			&sensor_dev_attr_pwm1_mode.dev_attr.attr,
858			S_IRUGO | S_IWUSR);
859		if (err)
860			goto exit_remove;
861		err = sysfs_chmod_file(&client->dev.kobj,
862			&sensor_dev_attr_pwm2_mode.dev_attr.attr,
863			S_IRUGO | S_IWUSR);
864		if (err)
865			goto exit_remove;
866	}
867
868	data->hwmon_dev = hwmon_device_register(&client->dev);
869	if (IS_ERR(data->hwmon_dev)) {
870		err = PTR_ERR(data->hwmon_dev);
871		goto exit_remove;
872	}
873
874	f75375_init(client, data, f75375s_pdata);
875
876	return 0;
877
878exit_remove:
879	sysfs_remove_group(&client->dev.kobj, &f75375_group);
880	return err;
881}
882
883static int f75375_remove(struct i2c_client *client)
884{
885	struct f75375_data *data = i2c_get_clientdata(client);
886	hwmon_device_unregister(data->hwmon_dev);
887	sysfs_remove_group(&client->dev.kobj, &f75375_group);
888	return 0;
889}
890
891/* Return 0 if detection is successful, -ENODEV otherwise */
892static int f75375_detect(struct i2c_client *client,
893			 struct i2c_board_info *info)
894{
895	struct i2c_adapter *adapter = client->adapter;
896	u16 vendid, chipid;
897	u8 version;
898	const char *name;
899
900	vendid = f75375_read16(client, F75375_REG_VENDOR);
901	chipid = f75375_read16(client, F75375_CHIP_ID);
902	if (vendid != 0x1934)
903		return -ENODEV;
904
905	if (chipid == 0x0306)
906		name = "f75375";
907	else if (chipid == 0x0204)
908		name = "f75373";
909	else if (chipid == 0x0410)
910		name = "f75387";
911	else
912		return -ENODEV;
913
914	version = f75375_read8(client, F75375_REG_VERSION);
915	dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
916	strlcpy(info->type, name, I2C_NAME_SIZE);
917
918	return 0;
919}
920
921module_i2c_driver(f75375_driver);
922
923MODULE_AUTHOR("Riku Voipio");
924MODULE_LICENSE("GPL");
925MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");