1	// SPDX-License-Identifier: GPL-2.0-only
2	/*
3	* w83793.c - Linux kernel driver for hardware monitoring
4	* Copyright (C) 2006 Winbond Electronics Corp.
5	* Yuan Mu
6	* Rudolf Marek <r.marek@assembler.cz>
7	* Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
8	* Watchdog driver part
9	* (Based partially on fschmd driver,
10	* Copyright 2007-2008 by Hans de Goede)
11	*/
12
13	/*
14	* Supports following chips:
15	*
16	* Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
17	* w83793 10 12 8 6 0x7b 0x5ca3 yes no
18	*/
19
20	#include <linux/module.h>
21	#include <linux/init.h>
22	#include <linux/slab.h>
23	#include <linux/i2c.h>
24	#include <linux/hwmon.h>
25	#include <linux/hwmon-vid.h>
26	#include <linux/hwmon-sysfs.h>
27	#include <linux/err.h>
28	#include <linux/mutex.h>
29	#include <linux/fs.h>
30	#include <linux/watchdog.h>
31	#include <linux/miscdevice.h>
32	#include <linux/uaccess.h>
33	#include <linux/kref.h>
34	#include <linux/notifier.h>
35	#include <linux/reboot.h>
36	#include <linux/jiffies.h>
37
38	/* Default values */
39	#define WATCHDOG_TIMEOUT 2 /* 2 minute default timeout */
40
41	/* Addresses to scan */
42	static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
43	I2C_CLIENT_END };
44
45	/* Insmod parameters */
46
47	static unsigned short force_subclients[4];
48	module_param_array(force_subclients, short, NULL, 0);
49	MODULE_PARM_DESC(force_subclients,
50	"List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
51
52	static bool reset;
53	module_param(reset, bool, 0);
54	MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
55
56	static int timeout = WATCHDOG_TIMEOUT; /* default timeout in minutes */
57	module_param(timeout, int, 0);
58	MODULE_PARM_DESC(timeout,
59	"Watchdog timeout in minutes. 2<= timeout <=255 (default="
60	__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
61
62	static bool nowayout = WATCHDOG_NOWAYOUT;
63	module_param(nowayout, bool, 0);
64	MODULE_PARM_DESC(nowayout,
65	"Watchdog cannot be stopped once started (default="
66	__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
67
68	/*
69	* Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
70	* as ID, Bank Select registers
71	*/
72	#define W83793_REG_BANKSEL 0x00
73	#define W83793_REG_VENDORID 0x0d
74	#define W83793_REG_CHIPID 0x0e
75	#define W83793_REG_DEVICEID 0x0f
76
77	#define W83793_REG_CONFIG 0x40
78	#define W83793_REG_MFC 0x58
79	#define W83793_REG_FANIN_CTRL 0x5c
80	#define W83793_REG_FANIN_SEL 0x5d
81	#define W83793_REG_I2C_ADDR 0x0b
82	#define W83793_REG_I2C_SUBADDR 0x0c
83	#define W83793_REG_VID_INA 0x05
84	#define W83793_REG_VID_INB 0x06
85	#define W83793_REG_VID_LATCHA 0x07
86	#define W83793_REG_VID_LATCHB 0x08
87	#define W83793_REG_VID_CTRL 0x59
88
89	#define W83793_REG_WDT_LOCK 0x01
90	#define W83793_REG_WDT_ENABLE 0x02
91	#define W83793_REG_WDT_STATUS 0x03
92	#define W83793_REG_WDT_TIMEOUT 0x04
93
94	static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
95
96	#define TEMP_READ 0
97	#define TEMP_CRIT 1
98	#define TEMP_CRIT_HYST 2
99	#define TEMP_WARN 3
100	#define TEMP_WARN_HYST 4
101	/*
102	* only crit and crit_hyst affect real-time alarm status
103	* current crit crit_hyst warn warn_hyst
104	*/
105	static u16 W83793_REG_TEMP[][5] = {
106	{0x1c, 0x78, 0x79, 0x7a, 0x7b},
107	{0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
108	{0x1e, 0x80, 0x81, 0x82, 0x83},
109	{0x1f, 0x84, 0x85, 0x86, 0x87},
110	{0x20, 0x88, 0x89, 0x8a, 0x8b},
111	{0x21, 0x8c, 0x8d, 0x8e, 0x8f},
112	};
113
114	#define W83793_REG_TEMP_LOW_BITS 0x22
115
116	#define W83793_REG_BEEP(index) (0x53 + (index))
117	#define W83793_REG_ALARM(index) (0x4b + (index))
118
119	#define W83793_REG_CLR_CHASSIS 0x4a /* SMI MASK4 */
120	#define W83793_REG_IRQ_CTRL 0x50
121	#define W83793_REG_OVT_CTRL 0x51
122	#define W83793_REG_OVT_BEEP 0x52
123
124	#define IN_READ 0
125	#define IN_MAX 1
126	#define IN_LOW 2
127	static const u16 W83793_REG_IN[][3] = {
128	/* Current, High, Low */
129	{0x10, 0x60, 0x61}, /* Vcore A */
130	{0x11, 0x62, 0x63}, /* Vcore B */
131	{0x12, 0x64, 0x65}, /* Vtt */
132	{0x14, 0x6a, 0x6b}, /* VSEN1 */
133	{0x15, 0x6c, 0x6d}, /* VSEN2 */
134	{0x16, 0x6e, 0x6f}, /* +3VSEN */
135	{0x17, 0x70, 0x71}, /* +12VSEN */
136	{0x18, 0x72, 0x73}, /* 5VDD */
137	{0x19, 0x74, 0x75}, /* 5VSB */
138	{0x1a, 0x76, 0x77}, /* VBAT */
139	};
140
141	/* Low Bits of Vcore A/B Vtt Read/High/Low */
142	static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
143	static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
144	static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
145
146	#define W83793_REG_FAN(index) (0x23 + 2 * (index)) /* High byte */
147	#define W83793_REG_FAN_MIN(index) (0x90 + 2 * (index)) /* High byte */
148
149	#define W83793_REG_PWM_DEFAULT 0xb2
150	#define W83793_REG_PWM_ENABLE 0x207
151	#define W83793_REG_PWM_UPTIME 0xc3 /* Unit in 0.1 second */
152	#define W83793_REG_PWM_DOWNTIME 0xc4 /* Unit in 0.1 second */
153	#define W83793_REG_TEMP_CRITICAL 0xc5
154
155	#define PWM_DUTY 0
156	#define PWM_START 1
157	#define PWM_NONSTOP 2
158	#define PWM_STOP_TIME 3
159	#define W83793_REG_PWM(index, nr) (((nr) == 0 ? 0xb3 : \
160	(nr) == 1 ? 0x220 : 0x218) + (index))
161
162	/* bit field, fan1 is bit0, fan2 is bit1 ... */
163	#define W83793_REG_TEMP_FAN_MAP(index) (0x201 + (index))
164	#define W83793_REG_TEMP_TOL(index) (0x208 + (index))
165	#define W83793_REG_TEMP_CRUISE(index) (0x210 + (index))
166	#define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
167	#define W83793_REG_SF2_TEMP(index, nr) (0x230 + ((index) << 4) + (nr))
168	#define W83793_REG_SF2_PWM(index, nr) (0x238 + ((index) << 4) + (nr))
169
170	static inline unsigned long FAN_FROM_REG(u16 val)
171	{
172	if ((val >= 0xfff) || (val == 0))
173	return 0;
174	return 1350000UL / val;
175	}
176
177	static inline u16 FAN_TO_REG(long rpm)
178	{
179	if (rpm <= 0)
180	return 0x0fff;
181	return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
182	}
183
184	static inline unsigned long TIME_FROM_REG(u8 reg)
185	{
186	return reg * 100;
187	}
188
189	static inline u8 TIME_TO_REG(unsigned long val)
190	{
191	return clamp_val((val + 50) / 100, 0, 0xff);
192	}
193
194	static inline long TEMP_FROM_REG(s8 reg)
195	{
196	return reg * 1000;
197	}
198
199	static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
200	{
201	return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max);
202	}
203
204	struct w83793_data {
205	struct device *hwmon_dev;
206	struct mutex update_lock;
207	bool valid; /* true if following fields are valid */
208	unsigned long last_updated; /* In jiffies */
209	unsigned long last_nonvolatile; /* In jiffies, last time we update the
210	* nonvolatile registers
211	*/
212
213	u8 bank;
214	u8 vrm;
215	u8 vid[2];
216	u8 in[10][3]; /* Register value, read/high/low */
217	u8 in_low_bits[3]; /* Additional resolution for VCore A/B Vtt */
218
219	u16 has_fan; /* Only fan1- fan5 has own pins */
220	u16 fan[12]; /* Register value combine */
221	u16 fan_min[12]; /* Register value combine */
222
223	s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */
224	u8 temp_low_bits; /* Additional resolution TD1-TD4 */
225	u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits
226	* byte 1: Temp R1,R2 mode, each has 1 bit
227	*/
228	u8 temp_critical; /* If reached all fan will be at full speed */
229	u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */
230
231	u8 has_pwm;
232	u8 has_temp;
233	u8 has_vid;
234	u8 pwm_enable; /* Register value, each Temp has 1 bit */
235	u8 pwm_uptime; /* Register value */
236	u8 pwm_downtime; /* Register value */
237	u8 pwm_default; /* All fan default pwm, next poweron valid */
238	u8 pwm[8][3]; /* Register value */
239	u8 pwm_stop_time[8];
240	u8 temp_cruise[6];
241
242	u8 alarms[5]; /* realtime status registers */
243	u8 beeps[5];
244	u8 beep_enable;
245	u8 tolerance[3]; /* Temp tolerance(Smart Fan I/II) */
246	u8 sf2_pwm[6][7]; /* Smart FanII: Fan duty cycle */
247	u8 sf2_temp[6][7]; /* Smart FanII: Temp level point */
248
249	/* watchdog */
250	struct i2c_client *client;
251	struct mutex watchdog_lock;
252	struct list_head list; /* member of the watchdog_data_list */
253	struct kref kref;
254	struct miscdevice watchdog_miscdev;
255	unsigned long watchdog_is_open;
256	char watchdog_expect_close;
257	char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
258	unsigned int watchdog_caused_reboot;
259	int watchdog_timeout; /* watchdog timeout in minutes */
260	};
261
262	/*
263	* Somewhat ugly :( global data pointer list with all devices, so that
264	* we can find our device data as when using misc_register. There is no
265	* other method to get to one's device data from the open file-op and
266	* for usage in the reboot notifier callback.
267	*/
268	static LIST_HEAD(watchdog_data_list);
269
270	/* Note this lock not only protect list access, but also data.kref access */
271	static DEFINE_MUTEX(watchdog_data_mutex);
272
273	/*
274	* Release our data struct when we're detached from the i2c client *and* all
275	* references to our watchdog device are released
276	*/
277	static void w83793_release_resources(struct kref *ref)
278	{
279	struct w83793_data *data = container_of(ref, struct w83793_data, kref);
280	kfree(objp: data);
281	}
282
283	static u8 w83793_read_value(struct i2c_client *client, u16 reg);
284	static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
285	static int w83793_probe(struct i2c_client *client);
286	static int w83793_detect(struct i2c_client *client,
287	struct i2c_board_info *info);
288	static void w83793_remove(struct i2c_client *client);
289	static void w83793_init_client(struct i2c_client *client);
290	static void w83793_update_nonvolatile(struct device *dev);
291	static struct w83793_data *w83793_update_device(struct device *dev);
292
293	static const struct i2c_device_id w83793_id[] = {
294	{ "w83793", 0 },
295	{ }
296	};
297	MODULE_DEVICE_TABLE(i2c, w83793_id);
298
299	static struct i2c_driver w83793_driver = {
300	.class = I2C_CLASS_HWMON,
301	.driver = {
302	.name = "w83793",
303	},
304	.probe = w83793_probe,
305	.remove = w83793_remove,
306	.id_table = w83793_id,
307	.detect = w83793_detect,
308	.address_list = normal_i2c,
309	};
310
311	static ssize_t
312	vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
313	{
314	struct w83793_data *data = dev_get_drvdata(dev);
315	return sprintf(buf, fmt: "%d\n", data->vrm);
316	}
317
318	static ssize_t
319	show_vid(struct device *dev, struct device_attribute *attr, char *buf)
320	{
321	struct w83793_data *data = w83793_update_device(dev);
322	struct sensor_device_attribute_2 *sensor_attr =
323	to_sensor_dev_attr_2(attr);
324	int index = sensor_attr->index;
325
326	return sprintf(buf, fmt: "%d\n", vid_from_reg(val: data->vid[index], vrm: data->vrm));
327	}
328
329	static ssize_t
330	vrm_store(struct device *dev, struct device_attribute *attr,
331	const char *buf, size_t count)
332	{
333	struct w83793_data *data = dev_get_drvdata(dev);
334	unsigned long val;
335	int err;
336
337	err = kstrtoul(s: buf, base: 10, res: &val);
338	if (err)
339	return err;
340
341	if (val > 255)
342	return -EINVAL;
343
344	data->vrm = val;
345	return count;
346	}
347
348	#define ALARM_STATUS 0
349	#define BEEP_ENABLE 1
350	static ssize_t
351	show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
352	{
353	struct w83793_data *data = w83793_update_device(dev);
354	struct sensor_device_attribute_2 *sensor_attr =
355	to_sensor_dev_attr_2(attr);
356	int nr = sensor_attr->nr;
357	int index = sensor_attr->index >> 3;
358	int bit = sensor_attr->index & 0x07;
359	u8 val;
360
361	if (nr == ALARM_STATUS) {
362	val = (data->alarms[index] >> (bit)) & 1;
363	} else { /* BEEP_ENABLE */
364	val = (data->beeps[index] >> (bit)) & 1;
365	}
366
367	return sprintf(buf, fmt: "%u\n", val);
368	}
369
370	static ssize_t
371	store_beep(struct device *dev, struct device_attribute *attr,
372	const char *buf, size_t count)
373	{
374	struct i2c_client *client = to_i2c_client(dev);
375	struct w83793_data *data = i2c_get_clientdata(client);
376	struct sensor_device_attribute_2 *sensor_attr =
377	to_sensor_dev_attr_2(attr);
378	int index = sensor_attr->index >> 3;
379	int shift = sensor_attr->index & 0x07;
380	u8 beep_bit = 1 << shift;
381	unsigned long val;
382	int err;
383
384	err = kstrtoul(s: buf, base: 10, res: &val);
385	if (err)
386	return err;
387
388	if (val > 1)
389	return -EINVAL;
390
391	mutex_lock(&data->update_lock);
392	data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
393	data->beeps[index] &= ~beep_bit;
394	data->beeps[index] |= val << shift;
395	w83793_write_value(client, W83793_REG_BEEP(index), value: data->beeps[index]);
396	mutex_unlock(lock: &data->update_lock);
397
398	return count;
399	}
400
401	static ssize_t
402	show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
403	{
404	struct w83793_data *data = w83793_update_device(dev);
405	return sprintf(buf, fmt: "%u\n", (data->beep_enable >> 1) & 0x01);
406	}
407
408	static ssize_t
409	store_beep_enable(struct device *dev, struct device_attribute *attr,
410	const char *buf, size_t count)
411	{
412	struct i2c_client *client = to_i2c_client(dev);
413	struct w83793_data *data = i2c_get_clientdata(client);
414	unsigned long val;
415	int err;
416
417	err = kstrtoul(s: buf, base: 10, res: &val);
418	if (err)
419	return err;
420
421	if (val > 1)
422	return -EINVAL;
423
424	mutex_lock(&data->update_lock);
425	data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
426	& 0xfd;
427	data->beep_enable |= val << 1;
428	w83793_write_value(client, W83793_REG_OVT_BEEP, value: data->beep_enable);
429	mutex_unlock(lock: &data->update_lock);
430
431	return count;
432	}
433
434	/* Write 0 to clear chassis alarm */
435	static ssize_t
436	store_chassis_clear(struct device *dev,
437	struct device_attribute *attr, const char *buf,
438	size_t count)
439	{
440	struct i2c_client *client = to_i2c_client(dev);
441	struct w83793_data *data = i2c_get_clientdata(client);
442	unsigned long val;
443	u8 reg;
444	int err;
445
446	err = kstrtoul(s: buf, base: 10, res: &val);
447	if (err)
448	return err;
449	if (val)
450	return -EINVAL;
451
452	mutex_lock(&data->update_lock);
453	reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
454	w83793_write_value(client, W83793_REG_CLR_CHASSIS, value: reg | 0x80);
455	data->valid = false; /* Force cache refresh */
456	mutex_unlock(lock: &data->update_lock);
457	return count;
458	}
459
460	#define FAN_INPUT 0
461	#define FAN_MIN 1
462	static ssize_t
463	show_fan(struct device *dev, struct device_attribute *attr, char *buf)
464	{
465	struct sensor_device_attribute_2 *sensor_attr =
466	to_sensor_dev_attr_2(attr);
467	int nr = sensor_attr->nr;
468	int index = sensor_attr->index;
469	struct w83793_data *data = w83793_update_device(dev);
470	u16 val;
471
472	if (nr == FAN_INPUT)
473	val = data->fan[index] & 0x0fff;
474	else
475	val = data->fan_min[index] & 0x0fff;
476
477	return sprintf(buf, fmt: "%lu\n", FAN_FROM_REG(val));
478	}
479
480	static ssize_t
481	store_fan_min(struct device *dev, struct device_attribute *attr,
482	const char *buf, size_t count)
483	{
484	struct sensor_device_attribute_2 *sensor_attr =
485	to_sensor_dev_attr_2(attr);
486	int index = sensor_attr->index;
487	struct i2c_client *client = to_i2c_client(dev);
488	struct w83793_data *data = i2c_get_clientdata(client);
489	unsigned long val;
490	int err;
491
492	err = kstrtoul(s: buf, base: 10, res: &val);
493	if (err)
494	return err;
495	val = FAN_TO_REG(rpm: val);
496
497	mutex_lock(&data->update_lock);
498	data->fan_min[index] = val;
499	w83793_write_value(client, W83793_REG_FAN_MIN(index),
500	value: (val >> 8) & 0xff);
501	w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, value: val & 0xff);
502	mutex_unlock(lock: &data->update_lock);
503
504	return count;
505	}
506
507	static ssize_t
508	show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
509	{
510	struct sensor_device_attribute_2 *sensor_attr =
511	to_sensor_dev_attr_2(attr);
512	struct w83793_data *data = w83793_update_device(dev);
513	u16 val;
514	int nr = sensor_attr->nr;
515	int index = sensor_attr->index;
516
517	if (nr == PWM_STOP_TIME)
518	val = TIME_FROM_REG(reg: data->pwm_stop_time[index]);
519	else
520	val = (data->pwm[index][nr] & 0x3f) << 2;
521
522	return sprintf(buf, fmt: "%d\n", val);
523	}
524
525	static ssize_t
526	store_pwm(struct device *dev, struct device_attribute *attr,
527	const char *buf, size_t count)
528	{
529	struct i2c_client *client = to_i2c_client(dev);
530	struct w83793_data *data = i2c_get_clientdata(client);
531	struct sensor_device_attribute_2 *sensor_attr =
532	to_sensor_dev_attr_2(attr);
533	int nr = sensor_attr->nr;
534	int index = sensor_attr->index;
535	unsigned long val;
536	int err;
537
538	err = kstrtoul(s: buf, base: 10, res: &val);
539	if (err)
540	return err;
541
542	mutex_lock(&data->update_lock);
543	if (nr == PWM_STOP_TIME) {
544	val = TIME_TO_REG(val);
545	data->pwm_stop_time[index] = val;
546	w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
547	value: val);
548	} else {
549	val = clamp_val(val, 0, 0xff) >> 2;
550	data->pwm[index][nr] =
551	w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
552	data->pwm[index][nr] |= val;
553	w83793_write_value(client, W83793_REG_PWM(index, nr),
554	value: data->pwm[index][nr]);
555	}
556
557	mutex_unlock(lock: &data->update_lock);
558	return count;
559	}
560
561	static ssize_t
562	show_temp(struct device *dev, struct device_attribute *attr, char *buf)
563	{
564	struct sensor_device_attribute_2 *sensor_attr =
565	to_sensor_dev_attr_2(attr);
566	int nr = sensor_attr->nr;
567	int index = sensor_attr->index;
568	struct w83793_data *data = w83793_update_device(dev);
569	long temp = TEMP_FROM_REG(reg: data->temp[index][nr]);
570
571	if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */
572	int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
573	temp += temp > 0 ? low : -low;
574	}
575	return sprintf(buf, fmt: "%ld\n", temp);
576	}
577
578	static ssize_t
579	store_temp(struct device *dev, struct device_attribute *attr,
580	const char *buf, size_t count)
581	{
582	struct sensor_device_attribute_2 *sensor_attr =
583	to_sensor_dev_attr_2(attr);
584	int nr = sensor_attr->nr;
585	int index = sensor_attr->index;
586	struct i2c_client *client = to_i2c_client(dev);
587	struct w83793_data *data = i2c_get_clientdata(client);
588	long tmp;
589	int err;
590
591	err = kstrtol(s: buf, base: 10, res: &tmp);
592	if (err)
593	return err;
594
595	mutex_lock(&data->update_lock);
596	data->temp[index][nr] = TEMP_TO_REG(val: tmp, min: -128, max: 127);
597	w83793_write_value(client, reg: W83793_REG_TEMP[index][nr],
598	value: data->temp[index][nr]);
599	mutex_unlock(lock: &data->update_lock);
600	return count;
601	}
602
603	/*
604	* TD1-TD4
605	* each has 4 mode:(2 bits)
606	* 0: Stop monitor
607	* 1: Use internal temp sensor(default)
608	* 2: Reserved
609	* 3: Use sensor in Intel CPU and get result by PECI
610	*
611	* TR1-TR2
612	* each has 2 mode:(1 bit)
613	* 0: Disable temp sensor monitor
614	* 1: To enable temp sensors monitor
615	*/
616
617	/* 0 disable, 6 PECI */
618	static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
619
620	static ssize_t
621	show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
622	{
623	struct w83793_data *data = w83793_update_device(dev);
624	struct sensor_device_attribute_2 *sensor_attr =
625	to_sensor_dev_attr_2(attr);
626	int index = sensor_attr->index;
627	u8 mask = (index < 4) ? 0x03 : 0x01;
628	u8 shift = (index < 4) ? (2 * index) : (index - 4);
629	u8 tmp;
630	index = (index < 4) ? 0 : 1;
631
632	tmp = (data->temp_mode[index] >> shift) & mask;
633
634	/* for the internal sensor, found out if diode or thermistor */
635	if (tmp == 1)
636	tmp = index == 0 ? 3 : 4;
637	else
638	tmp = TO_TEMP_MODE[tmp];
639
640	return sprintf(buf, fmt: "%d\n", tmp);
641	}
642
643	static ssize_t
644	store_temp_mode(struct device *dev, struct device_attribute *attr,
645	const char *buf, size_t count)
646	{
647	struct i2c_client *client = to_i2c_client(dev);
648	struct w83793_data *data = i2c_get_clientdata(client);
649	struct sensor_device_attribute_2 *sensor_attr =
650	to_sensor_dev_attr_2(attr);
651	int index = sensor_attr->index;
652	u8 mask = (index < 4) ? 0x03 : 0x01;
653	u8 shift = (index < 4) ? (2 * index) : (index - 4);
654	unsigned long val;
655	int err;
656
657	err = kstrtoul(s: buf, base: 10, res: &val);
658	if (err)
659	return err;
660
661	/* transform the sysfs interface values into table above */
662	if ((val == 6) && (index < 4)) {
663	val -= 3;
664	} else if ((val == 3 && index < 4)
665	|| (val == 4 && index >= 4)) {
666	/* transform diode or thermistor into internal enable */
667	val = !!val;
668	} else {
669	return -EINVAL;
670	}
671
672	index = (index < 4) ? 0 : 1;
673	mutex_lock(&data->update_lock);
674	data->temp_mode[index] =
675	w83793_read_value(client, reg: W83793_REG_TEMP_MODE[index]);
676	data->temp_mode[index] &= ~(mask << shift);
677	data->temp_mode[index] |= val << shift;
678	w83793_write_value(client, reg: W83793_REG_TEMP_MODE[index],
679	value: data->temp_mode[index]);
680	mutex_unlock(lock: &data->update_lock);
681
682	return count;
683	}
684
685	#define SETUP_PWM_DEFAULT 0
686	#define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */
687	#define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */
688	#define SETUP_TEMP_CRITICAL 3
689	static ssize_t
690	show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
691	{
692	struct sensor_device_attribute_2 *sensor_attr =
693	to_sensor_dev_attr_2(attr);
694	int nr = sensor_attr->nr;
695	struct w83793_data *data = w83793_update_device(dev);
696	u32 val = 0;
697
698	if (nr == SETUP_PWM_DEFAULT)
699	val = (data->pwm_default & 0x3f) << 2;
700	else if (nr == SETUP_PWM_UPTIME)
701	val = TIME_FROM_REG(reg: data->pwm_uptime);
702	else if (nr == SETUP_PWM_DOWNTIME)
703	val = TIME_FROM_REG(reg: data->pwm_downtime);
704	else if (nr == SETUP_TEMP_CRITICAL)
705	val = TEMP_FROM_REG(reg: data->temp_critical & 0x7f);
706
707	return sprintf(buf, fmt: "%d\n", val);
708	}
709
710	static ssize_t
711	store_sf_setup(struct device *dev, struct device_attribute *attr,
712	const char *buf, size_t count)
713	{
714	struct sensor_device_attribute_2 *sensor_attr =
715	to_sensor_dev_attr_2(attr);
716	int nr = sensor_attr->nr;
717	struct i2c_client *client = to_i2c_client(dev);
718	struct w83793_data *data = i2c_get_clientdata(client);
719	long val;
720	int err;
721
722	err = kstrtol(s: buf, base: 10, res: &val);
723	if (err)
724	return err;
725
726	mutex_lock(&data->update_lock);
727	if (nr == SETUP_PWM_DEFAULT) {
728	data->pwm_default =
729	w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
730	data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
731	w83793_write_value(client, W83793_REG_PWM_DEFAULT,
732	value: data->pwm_default);
733	} else if (nr == SETUP_PWM_UPTIME) {
734	data->pwm_uptime = TIME_TO_REG(val);
735	data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
736	w83793_write_value(client, W83793_REG_PWM_UPTIME,
737	value: data->pwm_uptime);
738	} else if (nr == SETUP_PWM_DOWNTIME) {
739	data->pwm_downtime = TIME_TO_REG(val);
740	data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
741	w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
742	value: data->pwm_downtime);
743	} else { /* SETUP_TEMP_CRITICAL */
744	data->temp_critical =
745	w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
746	data->temp_critical |= TEMP_TO_REG(val, min: 0, max: 0x7f);
747	w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
748	value: data->temp_critical);
749	}
750
751	mutex_unlock(lock: &data->update_lock);
752	return count;
753	}
754
755	/*
756	* Temp SmartFan control
757	* TEMP_FAN_MAP
758	* Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
759	* It's possible two or more temp channels control the same fan, w83793
760	* always prefers to pick the most critical request and applies it to
761	* the related Fan.
762	* It's possible one fan is not in any mapping of 6 temp channels, this
763	* means the fan is manual mode
764	*
765	* TEMP_PWM_ENABLE
766	* Each temp channel has its own SmartFan mode, and temp channel
767	* control fans that are set by TEMP_FAN_MAP
768	* 0: SmartFanII mode
769	* 1: Thermal Cruise Mode
770	*
771	* TEMP_CRUISE
772	* Target temperature in thermal cruise mode, w83793 will try to turn
773	* fan speed to keep the temperature of target device around this
774	* temperature.
775	*
776	* TEMP_TOLERANCE
777	* If Temp higher or lower than target with this tolerance, w83793
778	* will take actions to speed up or slow down the fan to keep the
779	* temperature within the tolerance range.
780	*/
781
782	#define TEMP_FAN_MAP 0
783	#define TEMP_PWM_ENABLE 1
784	#define TEMP_CRUISE 2
785	#define TEMP_TOLERANCE 3
786	static ssize_t
787	show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
788	{
789	struct sensor_device_attribute_2 *sensor_attr =
790	to_sensor_dev_attr_2(attr);
791	int nr = sensor_attr->nr;
792	int index = sensor_attr->index;
793	struct w83793_data *data = w83793_update_device(dev);
794	u32 val;
795
796	if (nr == TEMP_FAN_MAP) {
797	val = data->temp_fan_map[index];
798	} else if (nr == TEMP_PWM_ENABLE) {
799	/* +2 to transform into 2 and 3 to conform with sysfs intf */
800	val = ((data->pwm_enable >> index) & 0x01) + 2;
801	} else if (nr == TEMP_CRUISE) {
802	val = TEMP_FROM_REG(reg: data->temp_cruise[index] & 0x7f);
803	} else { /* TEMP_TOLERANCE */
804	val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
805	val = TEMP_FROM_REG(reg: val & 0x0f);
806	}
807	return sprintf(buf, fmt: "%d\n", val);
808	}
809
810	static ssize_t
811	store_sf_ctrl(struct device *dev, struct device_attribute *attr,
812	const char *buf, size_t count)
813	{
814	struct sensor_device_attribute_2 *sensor_attr =
815	to_sensor_dev_attr_2(attr);
816	int nr = sensor_attr->nr;
817	int index = sensor_attr->index;
818	struct i2c_client *client = to_i2c_client(dev);
819	struct w83793_data *data = i2c_get_clientdata(client);
820	long val;
821	int err;
822
823	err = kstrtol(s: buf, base: 10, res: &val);
824	if (err)
825	return err;
826
827	mutex_lock(&data->update_lock);
828	if (nr == TEMP_FAN_MAP) {
829	val = clamp_val(val, 0, 255);
830	w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), value: val);
831	data->temp_fan_map[index] = val;
832	} else if (nr == TEMP_PWM_ENABLE) {
833	if (val == 2 || val == 3) {
834	data->pwm_enable =
835	w83793_read_value(client, W83793_REG_PWM_ENABLE);
836	if (val - 2)
837	data->pwm_enable |= 1 << index;
838	else
839	data->pwm_enable &= ~(1 << index);
840	w83793_write_value(client, W83793_REG_PWM_ENABLE,
841	value: data->pwm_enable);
842	} else {
843	mutex_unlock(lock: &data->update_lock);
844	return -EINVAL;
845	}
846	} else if (nr == TEMP_CRUISE) {
847	data->temp_cruise[index] =
848	w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
849	data->temp_cruise[index] &= 0x80;
850	data->temp_cruise[index] |= TEMP_TO_REG(val, min: 0, max: 0x7f);
851
852	w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
853	value: data->temp_cruise[index]);
854	} else { /* TEMP_TOLERANCE */
855	int i = index >> 1;
856	u8 shift = (index & 0x01) ? 4 : 0;
857	data->tolerance[i] =
858	w83793_read_value(client, W83793_REG_TEMP_TOL(i));
859
860	data->tolerance[i] &= ~(0x0f << shift);
861	data->tolerance[i] |= TEMP_TO_REG(val, min: 0, max: 0x0f) << shift;
862	w83793_write_value(client, W83793_REG_TEMP_TOL(i),
863	value: data->tolerance[i]);
864	}
865
866	mutex_unlock(lock: &data->update_lock);
867	return count;
868	}
869
870	static ssize_t
871	show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
872	{
873	struct sensor_device_attribute_2 *sensor_attr =
874	to_sensor_dev_attr_2(attr);
875	int nr = sensor_attr->nr;
876	int index = sensor_attr->index;
877	struct w83793_data *data = w83793_update_device(dev);
878
879	return sprintf(buf, fmt: "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
880	}
881
882	static ssize_t
883	store_sf2_pwm(struct device *dev, struct device_attribute *attr,
884	const char *buf, size_t count)
885	{
886	struct i2c_client *client = to_i2c_client(dev);
887	struct w83793_data *data = i2c_get_clientdata(client);
888	struct sensor_device_attribute_2 *sensor_attr =
889	to_sensor_dev_attr_2(attr);
890	int nr = sensor_attr->nr;
891	int index = sensor_attr->index;
892	unsigned long val;
893	int err;
894
895	err = kstrtoul(s: buf, base: 10, res: &val);
896	if (err)
897	return err;
898	val = clamp_val(val, 0, 0xff) >> 2;
899
900	mutex_lock(&data->update_lock);
901	data->sf2_pwm[index][nr] =
902	w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
903	data->sf2_pwm[index][nr] |= val;
904	w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
905	value: data->sf2_pwm[index][nr]);
906	mutex_unlock(lock: &data->update_lock);
907	return count;
908	}
909
910	static ssize_t
911	show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
912	{
913	struct sensor_device_attribute_2 *sensor_attr =
914	to_sensor_dev_attr_2(attr);
915	int nr = sensor_attr->nr;
916	int index = sensor_attr->index;
917	struct w83793_data *data = w83793_update_device(dev);
918
919	return sprintf(buf, fmt: "%ld\n",
920	TEMP_FROM_REG(reg: data->sf2_temp[index][nr] & 0x7f));
921	}
922
923	static ssize_t
924	store_sf2_temp(struct device *dev, struct device_attribute *attr,
925	const char *buf, size_t count)
926	{
927	struct i2c_client *client = to_i2c_client(dev);
928	struct w83793_data *data = i2c_get_clientdata(client);
929	struct sensor_device_attribute_2 *sensor_attr =
930	to_sensor_dev_attr_2(attr);
931	int nr = sensor_attr->nr;
932	int index = sensor_attr->index;
933	long val;
934	int err;
935
936	err = kstrtol(s: buf, base: 10, res: &val);
937	if (err)
938	return err;
939	val = TEMP_TO_REG(val, min: 0, max: 0x7f);
940
941	mutex_lock(&data->update_lock);
942	data->sf2_temp[index][nr] =
943	w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
944	data->sf2_temp[index][nr] |= val;
945	w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
946	value: data->sf2_temp[index][nr]);
947	mutex_unlock(lock: &data->update_lock);
948	return count;
949	}
950
951	/* only Vcore A/B and Vtt have additional 2 bits precision */
952	static ssize_t
953	show_in(struct device *dev, struct device_attribute *attr, char *buf)
954	{
955	struct sensor_device_attribute_2 *sensor_attr =
956	to_sensor_dev_attr_2(attr);
957	int nr = sensor_attr->nr;
958	int index = sensor_attr->index;
959	struct w83793_data *data = w83793_update_device(dev);
960	u16 val = data->in[index][nr];
961
962	if (index < 3) {
963	val <<= 2;
964	val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
965	}
966	/* voltage inputs 5VDD and 5VSB needs 150mV offset */
967	val = val * scale_in[index] + scale_in_add[index];
968	return sprintf(buf, fmt: "%d\n", val);
969	}
970
971	static ssize_t
972	store_in(struct device *dev, struct device_attribute *attr,
973	const char *buf, size_t count)
974	{
975	struct sensor_device_attribute_2 *sensor_attr =
976	to_sensor_dev_attr_2(attr);
977	int nr = sensor_attr->nr;
978	int index = sensor_attr->index;
979	struct i2c_client *client = to_i2c_client(dev);
980	struct w83793_data *data = i2c_get_clientdata(client);
981	unsigned long val;
982	int err;
983
984	err = kstrtoul(s: buf, base: 10, res: &val);
985	if (err)
986	return err;
987	val = (val + scale_in[index] / 2) / scale_in[index];
988
989	mutex_lock(&data->update_lock);
990	if (index > 2) {
991	/* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
992	if (nr == 1 || nr == 2)
993	val -= scale_in_add[index] / scale_in[index];
994	val = clamp_val(val, 0, 255);
995	} else {
996	val = clamp_val(val, 0, 0x3FF);
997	data->in_low_bits[nr] =
998	w83793_read_value(client, reg: W83793_REG_IN_LOW_BITS[nr]);
999	data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1000	data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1001	w83793_write_value(client, reg: W83793_REG_IN_LOW_BITS[nr],
1002	value: data->in_low_bits[nr]);
1003	val >>= 2;
1004	}
1005	data->in[index][nr] = val;
1006	w83793_write_value(client, reg: W83793_REG_IN[index][nr],
1007	value: data->in[index][nr]);
1008	mutex_unlock(lock: &data->update_lock);
1009	return count;
1010	}
1011
1012	#define NOT_USED -1
1013
1014	#define SENSOR_ATTR_IN(index) \
1015	SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \
1016	IN_READ, index), \
1017	SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \
1018	store_in, IN_MAX, index), \
1019	SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \
1020	store_in, IN_LOW, index), \
1021	SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \
1022	NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \
1023	SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \
1024	show_alarm_beep, store_beep, BEEP_ENABLE, \
1025	index + ((index > 2) ? 1 : 0))
1026
1027	#define SENSOR_ATTR_FAN(index) \
1028	SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \
1029	NULL, ALARM_STATUS, index + 17), \
1030	SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \
1031	show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \
1032	SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \
1033	NULL, FAN_INPUT, index - 1), \
1034	SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \
1035	show_fan, store_fan_min, FAN_MIN, index - 1)
1036
1037	#define SENSOR_ATTR_PWM(index) \
1038	SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \
1039	store_pwm, PWM_DUTY, index - 1), \
1040	SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \
1041	show_pwm, store_pwm, PWM_NONSTOP, index - 1), \
1042	SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \
1043	show_pwm, store_pwm, PWM_START, index - 1), \
1044	SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \
1045	show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1046
1047	#define SENSOR_ATTR_TEMP(index) \
1048	SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \
1049	show_temp_mode, store_temp_mode, NOT_USED, index - 1), \
1050	SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \
1051	NULL, TEMP_READ, index - 1), \
1052	SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \
1053	store_temp, TEMP_CRIT, index - 1), \
1054	SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
1055	show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \
1056	SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1057	store_temp, TEMP_WARN, index - 1), \
1058	SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \
1059	show_temp, store_temp, TEMP_WARN_HYST, index - 1), \
1060	SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
1061	show_alarm_beep, NULL, ALARM_STATUS, index + 11), \
1062	SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
1063	show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \
1064	SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \
1065	S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \
1066	TEMP_FAN_MAP, index - 1), \
1067	SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
1068	show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \
1069	index - 1), \
1070	SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \
1071	show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \
1072	SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1073	store_sf_ctrl, TEMP_TOLERANCE, index - 1), \
1074	SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1075	show_sf2_pwm, store_sf2_pwm, 0, index - 1), \
1076	SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1077	show_sf2_pwm, store_sf2_pwm, 1, index - 1), \
1078	SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1079	show_sf2_pwm, store_sf2_pwm, 2, index - 1), \
1080	SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1081	show_sf2_pwm, store_sf2_pwm, 3, index - 1), \
1082	SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1083	show_sf2_pwm, store_sf2_pwm, 4, index - 1), \
1084	SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1085	show_sf2_pwm, store_sf2_pwm, 5, index - 1), \
1086	SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1087	show_sf2_pwm, store_sf2_pwm, 6, index - 1), \
1088	SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1089	show_sf2_temp, store_sf2_temp, 0, index - 1), \
1090	SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1091	show_sf2_temp, store_sf2_temp, 1, index - 1), \
1092	SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1093	show_sf2_temp, store_sf2_temp, 2, index - 1), \
1094	SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1095	show_sf2_temp, store_sf2_temp, 3, index - 1), \
1096	SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1097	show_sf2_temp, store_sf2_temp, 4, index - 1), \
1098	SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1099	show_sf2_temp, store_sf2_temp, 5, index - 1), \
1100	SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1101	show_sf2_temp, store_sf2_temp, 6, index - 1)
1102
1103	static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1104	SENSOR_ATTR_IN(0),
1105	SENSOR_ATTR_IN(1),
1106	SENSOR_ATTR_IN(2),
1107	SENSOR_ATTR_IN(3),
1108	SENSOR_ATTR_IN(4),
1109	SENSOR_ATTR_IN(5),
1110	SENSOR_ATTR_IN(6),
1111	SENSOR_ATTR_IN(7),
1112	SENSOR_ATTR_IN(8),
1113	SENSOR_ATTR_IN(9),
1114	SENSOR_ATTR_FAN(1),
1115	SENSOR_ATTR_FAN(2),
1116	SENSOR_ATTR_FAN(3),
1117	SENSOR_ATTR_FAN(4),
1118	SENSOR_ATTR_FAN(5),
1119	SENSOR_ATTR_PWM(1),
1120	SENSOR_ATTR_PWM(2),
1121	SENSOR_ATTR_PWM(3),
1122	};
1123
1124	static struct sensor_device_attribute_2 w83793_temp[] = {
1125	SENSOR_ATTR_TEMP(1),
1126	SENSOR_ATTR_TEMP(2),
1127	SENSOR_ATTR_TEMP(3),
1128	SENSOR_ATTR_TEMP(4),
1129	SENSOR_ATTR_TEMP(5),
1130	SENSOR_ATTR_TEMP(6),
1131	};
1132
1133	/* Fan6-Fan12 */
1134	static struct sensor_device_attribute_2 w83793_left_fan[] = {
1135	SENSOR_ATTR_FAN(6),
1136	SENSOR_ATTR_FAN(7),
1137	SENSOR_ATTR_FAN(8),
1138	SENSOR_ATTR_FAN(9),
1139	SENSOR_ATTR_FAN(10),
1140	SENSOR_ATTR_FAN(11),
1141	SENSOR_ATTR_FAN(12),
1142	};
1143
1144	/* Pwm4-Pwm8 */
1145	static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1146	SENSOR_ATTR_PWM(4),
1147	SENSOR_ATTR_PWM(5),
1148	SENSOR_ATTR_PWM(6),
1149	SENSOR_ATTR_PWM(7),
1150	SENSOR_ATTR_PWM(8),
1151	};
1152
1153	static struct sensor_device_attribute_2 w83793_vid[] = {
1154	SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1155	SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1156	};
1157	static DEVICE_ATTR_RW(vrm);
1158
1159	static struct sensor_device_attribute_2 sda_single_files[] = {
1160	SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1161	store_chassis_clear, ALARM_STATUS, 30),
1162	SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1163	store_beep_enable, NOT_USED, NOT_USED),
1164	SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1165	store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1166	SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1167	store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1168	SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1169	store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1170	SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1171	store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1172	};
1173
1174	static void w83793_init_client(struct i2c_client *client)
1175	{
1176	if (reset)
1177	w83793_write_value(client, W83793_REG_CONFIG, value: 0x80);
1178
1179	/* Start monitoring */
1180	w83793_write_value(client, W83793_REG_CONFIG,
1181	value: w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1182	}
1183
1184	/*
1185	* Watchdog routines
1186	*/
1187
1188	static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1189	{
1190	unsigned int mtimeout;
1191	int ret;
1192
1193	mtimeout = DIV_ROUND_UP(timeout, 60);
1194
1195	if (mtimeout > 255)
1196	return -EINVAL;
1197
1198	mutex_lock(&data->watchdog_lock);
1199	if (!data->client) {
1200	ret = -ENODEV;
1201	goto leave;
1202	}
1203
1204	data->watchdog_timeout = mtimeout;
1205
1206	/* Set Timeout value (in Minutes) */
1207	w83793_write_value(client: data->client, W83793_REG_WDT_TIMEOUT,
1208	value: data->watchdog_timeout);
1209
1210	ret = mtimeout * 60;
1211
1212	leave:
1213	mutex_unlock(lock: &data->watchdog_lock);
1214	return ret;
1215	}
1216
1217	static int watchdog_get_timeout(struct w83793_data *data)
1218	{
1219	int timeout;
1220
1221	mutex_lock(&data->watchdog_lock);
1222	timeout = data->watchdog_timeout * 60;
1223	mutex_unlock(lock: &data->watchdog_lock);
1224
1225	return timeout;
1226	}
1227
1228	static int watchdog_trigger(struct w83793_data *data)
1229	{
1230	int ret = 0;
1231
1232	mutex_lock(&data->watchdog_lock);
1233	if (!data->client) {
1234	ret = -ENODEV;
1235	goto leave;
1236	}
1237
1238	/* Set Timeout value (in Minutes) */
1239	w83793_write_value(client: data->client, W83793_REG_WDT_TIMEOUT,
1240	value: data->watchdog_timeout);
1241
1242	leave:
1243	mutex_unlock(lock: &data->watchdog_lock);
1244	return ret;
1245	}
1246
1247	static int watchdog_enable(struct w83793_data *data)
1248	{
1249	int ret = 0;
1250
1251	mutex_lock(&data->watchdog_lock);
1252	if (!data->client) {
1253	ret = -ENODEV;
1254	goto leave;
1255	}
1256
1257	/* Set initial timeout */
1258	w83793_write_value(client: data->client, W83793_REG_WDT_TIMEOUT,
1259	value: data->watchdog_timeout);
1260
1261	/* Enable Soft Watchdog */
1262	w83793_write_value(client: data->client, W83793_REG_WDT_LOCK, value: 0x55);
1263
1264	leave:
1265	mutex_unlock(lock: &data->watchdog_lock);
1266	return ret;
1267	}
1268
1269	static int watchdog_disable(struct w83793_data *data)
1270	{
1271	int ret = 0;
1272
1273	mutex_lock(&data->watchdog_lock);
1274	if (!data->client) {
1275	ret = -ENODEV;
1276	goto leave;
1277	}
1278
1279	/* Disable Soft Watchdog */
1280	w83793_write_value(client: data->client, W83793_REG_WDT_LOCK, value: 0xAA);
1281
1282	leave:
1283	mutex_unlock(lock: &data->watchdog_lock);
1284	return ret;
1285	}
1286
1287	static int watchdog_open(struct inode *inode, struct file *filp)
1288	{
1289	struct w83793_data *pos, *data = NULL;
1290	int watchdog_is_open;
1291
1292	/*
1293	* We get called from drivers/char/misc.c with misc_mtx hold, and we
1294	* call misc_register() from w83793_probe() with watchdog_data_mutex
1295	* hold, as misc_register() takes the misc_mtx lock, this is a possible
1296	* deadlock, so we use mutex_trylock here.
1297	*/
1298	if (!mutex_trylock(lock: &watchdog_data_mutex))
1299	return -ERESTARTSYS;
1300	list_for_each_entry(pos, &watchdog_data_list, list) {
1301	if (pos->watchdog_miscdev.minor == iminor(inode)) {
1302	data = pos;
1303	break;
1304	}
1305	}
1306
1307	/* Check, if device is already open */
1308	watchdog_is_open = test_and_set_bit(nr: 0, addr: &data->watchdog_is_open);
1309
1310	/*
1311	* Increase data reference counter (if not already done).
1312	* Note we can never not have found data, so we don't check for this
1313	*/
1314	if (!watchdog_is_open)
1315	kref_get(kref: &data->kref);
1316
1317	mutex_unlock(lock: &watchdog_data_mutex);
1318
1319	/* Check, if device is already open and possibly issue error */
1320	if (watchdog_is_open)
1321	return -EBUSY;
1322
1323	/* Enable Soft Watchdog */
1324	watchdog_enable(data);
1325
1326	/* Store pointer to data into filp's private data */
1327	filp->private_data = data;
1328
1329	return stream_open(inode, filp);
1330	}
1331
1332	static int watchdog_close(struct inode *inode, struct file *filp)
1333	{
1334	struct w83793_data *data = filp->private_data;
1335
1336	if (data->watchdog_expect_close) {
1337	watchdog_disable(data);
1338	data->watchdog_expect_close = 0;
1339	} else {
1340	watchdog_trigger(data);
1341	dev_crit(&data->client->dev,
1342	"unexpected close, not stopping watchdog!\n");
1343	}
1344
1345	clear_bit(nr: 0, addr: &data->watchdog_is_open);
1346
1347	/* Decrease data reference counter */
1348	mutex_lock(&watchdog_data_mutex);
1349	kref_put(kref: &data->kref, release: w83793_release_resources);
1350	mutex_unlock(lock: &watchdog_data_mutex);
1351
1352	return 0;
1353	}
1354
1355	static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1356	size_t count, loff_t *offset)
1357	{
1358	ssize_t ret;
1359	struct w83793_data *data = filp->private_data;
1360
1361	if (count) {
1362	if (!nowayout) {
1363	size_t i;
1364
1365	/* Clear it in case it was set with a previous write */
1366	data->watchdog_expect_close = 0;
1367
1368	for (i = 0; i != count; i++) {
1369	char c;
1370	if (get_user(c, buf + i))
1371	return -EFAULT;
1372	if (c == 'V')
1373	data->watchdog_expect_close = 1;
1374	}
1375	}
1376	ret = watchdog_trigger(data);
1377	if (ret < 0)
1378	return ret;
1379	}
1380	return count;
1381	}
1382
1383	static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1384	unsigned long arg)
1385	{
1386	struct watchdog_info ident = {
1387	.options = WDIOF_KEEPALIVEPING |
1388	WDIOF_SETTIMEOUT |
1389	WDIOF_CARDRESET,
1390	.identity = "w83793 watchdog"
1391	};
1392
1393	int val, ret = 0;
1394	struct w83793_data *data = filp->private_data;
1395
1396	switch (cmd) {
1397	case WDIOC_GETSUPPORT:
1398	if (!nowayout)
1399	ident.options |= WDIOF_MAGICCLOSE;
1400	if (copy_to_user(to: (void __user *)arg, from: &ident, n: sizeof(ident)))
1401	ret = -EFAULT;
1402	break;
1403
1404	case WDIOC_GETSTATUS:
1405	val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1406	ret = put_user(val, (int __user *)arg);
1407	break;
1408
1409	case WDIOC_GETBOOTSTATUS:
1410	ret = put_user(0, (int __user *)arg);
1411	break;
1412
1413	case WDIOC_KEEPALIVE:
1414	ret = watchdog_trigger(data);
1415	break;
1416
1417	case WDIOC_GETTIMEOUT:
1418	val = watchdog_get_timeout(data);
1419	ret = put_user(val, (int __user *)arg);
1420	break;
1421
1422	case WDIOC_SETTIMEOUT:
1423	if (get_user(val, (int __user *)arg)) {
1424	ret = -EFAULT;
1425	break;
1426	}
1427	ret = watchdog_set_timeout(data, timeout: val);
1428	if (ret > 0)
1429	ret = put_user(ret, (int __user *)arg);
1430	break;
1431
1432	case WDIOC_SETOPTIONS:
1433	if (get_user(val, (int __user *)arg)) {
1434	ret = -EFAULT;
1435	break;
1436	}
1437
1438	if (val & WDIOS_DISABLECARD)
1439	ret = watchdog_disable(data);
1440	else if (val & WDIOS_ENABLECARD)
1441	ret = watchdog_enable(data);
1442	else
1443	ret = -EINVAL;
1444
1445	break;
1446	default:
1447	ret = -ENOTTY;
1448	}
1449	return ret;
1450	}
1451
1452	static const struct file_operations watchdog_fops = {
1453	.owner = THIS_MODULE,
1454	.llseek = no_llseek,
1455	.open = watchdog_open,
1456	.release = watchdog_close,
1457	.write = watchdog_write,
1458	.unlocked_ioctl = watchdog_ioctl,
1459	.compat_ioctl = compat_ptr_ioctl,
1460	};
1461
1462	/*
1463	* Notifier for system down
1464	*/
1465
1466	static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1467	void *unused)
1468	{
1469	struct w83793_data *data = NULL;
1470
1471	if (code == SYS_DOWN || code == SYS_HALT) {
1472
1473	/* Disable each registered watchdog */
1474	mutex_lock(&watchdog_data_mutex);
1475	list_for_each_entry(data, &watchdog_data_list, list) {
1476	if (data->watchdog_miscdev.minor)
1477	watchdog_disable(data);
1478	}
1479	mutex_unlock(lock: &watchdog_data_mutex);
1480	}
1481
1482	return NOTIFY_DONE;
1483	}
1484
1485	/*
1486	* The WDT needs to learn about soft shutdowns in order to
1487	* turn the timebomb registers off.
1488	*/
1489
1490	static struct notifier_block watchdog_notifier = {
1491	.notifier_call = watchdog_notify_sys,
1492	};
1493
1494	/*
1495	* Init / remove routines
1496	*/
1497
1498	static void w83793_remove(struct i2c_client *client)
1499	{
1500	struct w83793_data *data = i2c_get_clientdata(client);
1501	struct device *dev = &client->dev;
1502	int i, tmp;
1503
1504	/* Unregister the watchdog (if registered) */
1505	if (data->watchdog_miscdev.minor) {
1506	misc_deregister(misc: &data->watchdog_miscdev);
1507
1508	if (data->watchdog_is_open) {
1509	dev_warn(&client->dev,
1510	"i2c client detached with watchdog open! "
1511	"Stopping watchdog.\n");
1512	watchdog_disable(data);
1513	}
1514
1515	mutex_lock(&watchdog_data_mutex);
1516	list_del(entry: &data->list);
1517	mutex_unlock(lock: &watchdog_data_mutex);
1518
1519	/* Tell the watchdog code the client is gone */
1520	mutex_lock(&data->watchdog_lock);
1521	data->client = NULL;
1522	mutex_unlock(lock: &data->watchdog_lock);
1523	}
1524
1525	/* Reset Configuration Register to Disable Watch Dog Registers */
1526	tmp = w83793_read_value(client, W83793_REG_CONFIG);
1527	w83793_write_value(client, W83793_REG_CONFIG, value: tmp & ~0x04);
1528
1529	unregister_reboot_notifier(&watchdog_notifier);
1530
1531	hwmon_device_unregister(dev: data->hwmon_dev);
1532
1533	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1534	device_remove_file(dev,
1535	attr: &w83793_sensor_attr_2[i].dev_attr);
1536
1537	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1538	device_remove_file(dev, attr: &sda_single_files[i].dev_attr);
1539
1540	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1541	device_remove_file(dev, attr: &w83793_vid[i].dev_attr);
1542	device_remove_file(dev, attr: &dev_attr_vrm);
1543
1544	for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1545	device_remove_file(dev, attr: &w83793_left_fan[i].dev_attr);
1546
1547	for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1548	device_remove_file(dev, attr: &w83793_left_pwm[i].dev_attr);
1549
1550	for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1551	device_remove_file(dev, attr: &w83793_temp[i].dev_attr);
1552
1553	/* Decrease data reference counter */
1554	mutex_lock(&watchdog_data_mutex);
1555	kref_put(kref: &data->kref, release: w83793_release_resources);
1556	mutex_unlock(lock: &watchdog_data_mutex);
1557	}
1558
1559	static int
1560	w83793_detect_subclients(struct i2c_client *client)
1561	{
1562	int i, id;
1563	int address = client->addr;
1564	u8 tmp;
1565	struct i2c_adapter *adapter = client->adapter;
1566
1567	id = i2c_adapter_id(adap: adapter);
1568	if (force_subclients[0] == id && force_subclients[1] == address) {
1569	for (i = 2; i <= 3; i++) {
1570	if (force_subclients[i] < 0x48
1571	|| force_subclients[i] > 0x4f) {
1572	dev_err(&client->dev,
1573	"invalid subclient "
1574	"address %d; must be 0x48-0x4f\n",
1575	force_subclients[i]);
1576	return -EINVAL;
1577	}
1578	}
1579	w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1580	value: (force_subclients[2] & 0x07) |
1581	((force_subclients[3] & 0x07) << 4));
1582	}
1583
1584	tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1585
1586	if (!(tmp & 0x88) && (tmp & 0x7) == ((tmp >> 4) & 0x7)) {
1587	dev_err(&client->dev,
1588	"duplicate addresses 0x%x, use force_subclient\n", 0x48 + (tmp & 0x7));
1589	return -ENODEV;
1590	}
1591
1592	if (!(tmp & 0x08))
1593	devm_i2c_new_dummy_device(dev: &client->dev, adap: adapter, address: 0x48 + (tmp & 0x7));
1594
1595	if (!(tmp & 0x80))
1596	devm_i2c_new_dummy_device(dev: &client->dev, adap: adapter, address: 0x48 + ((tmp >> 4) & 0x7));
1597
1598	return 0;
1599	}
1600
1601	/* Return 0 if detection is successful, -ENODEV otherwise */
1602	static int w83793_detect(struct i2c_client *client,
1603	struct i2c_board_info *info)
1604	{
1605	u8 tmp, bank, chip_id;
1606	struct i2c_adapter *adapter = client->adapter;
1607	unsigned short address = client->addr;
1608
1609	if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1610	return -ENODEV;
1611
1612	bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1613
1614	tmp = bank & 0x80 ? 0x5c : 0xa3;
1615	/* Check Winbond vendor ID */
1616	if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1617	pr_debug("w83793: Detection failed at check vendor id\n");
1618	return -ENODEV;
1619	}
1620
1621	/*
1622	* If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1623	* should match
1624	*/
1625	if ((bank & 0x07) == 0
1626	&& i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1627	(address << 1)) {
1628	pr_debug("w83793: Detection failed at check i2c addr\n");
1629	return -ENODEV;
1630	}
1631
1632	/* Determine the chip type now */
1633	chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1634	if (chip_id != 0x7b)
1635	return -ENODEV;
1636
1637	strscpy(p: info->type, q: "w83793", I2C_NAME_SIZE);
1638
1639	return 0;
1640	}
1641
1642	static int w83793_probe(struct i2c_client *client)
1643	{
1644	struct device *dev = &client->dev;
1645	static const int watchdog_minors[] = {
1646	WATCHDOG_MINOR, 212, 213, 214, 215
1647	};
1648	struct w83793_data *data;
1649	int i, tmp, val, err;
1650	int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1651	int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1652	int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1653
1654	data = kzalloc(size: sizeof(struct w83793_data), GFP_KERNEL);
1655	if (!data) {
1656	err = -ENOMEM;
1657	goto exit;
1658	}
1659
1660	i2c_set_clientdata(client, data);
1661	data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1662	mutex_init(&data->update_lock);
1663	mutex_init(&data->watchdog_lock);
1664	INIT_LIST_HEAD(list: &data->list);
1665	kref_init(kref: &data->kref);
1666
1667	/*
1668	* Store client pointer in our data struct for watchdog usage
1669	* (where the client is found through a data ptr instead of the
1670	* otherway around)
1671	*/
1672	data->client = client;
1673
1674	err = w83793_detect_subclients(client);
1675	if (err)
1676	goto free_mem;
1677
1678	/* Initialize the chip */
1679	w83793_init_client(client);
1680
1681	/*
1682	* Only fan 1-5 has their own input pins,
1683	* Pwm 1-3 has their own pins
1684	*/
1685	data->has_fan = 0x1f;
1686	data->has_pwm = 0x07;
1687	tmp = w83793_read_value(client, W83793_REG_MFC);
1688	val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1689
1690	/* check the function of pins 49-56 */
1691	if (tmp & 0x80) {
1692	data->has_vid |= 0x2; /* has VIDB */
1693	} else {
1694	data->has_pwm |= 0x18; /* pwm 4,5 */
1695	if (val & 0x01) { /* fan 6 */
1696	data->has_fan |= 0x20;
1697	data->has_pwm |= 0x20;
1698	}
1699	if (val & 0x02) { /* fan 7 */
1700	data->has_fan |= 0x40;
1701	data->has_pwm |= 0x40;
1702	}
1703	if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */
1704	data->has_fan |= 0x80;
1705	data->has_pwm |= 0x80;
1706	}
1707	}
1708
1709	/* check the function of pins 37-40 */
1710	if (!(tmp & 0x29))
1711	data->has_vid |= 0x1; /* has VIDA */
1712	if (0x08 == (tmp & 0x0c)) {
1713	if (val & 0x08) /* fan 9 */
1714	data->has_fan |= 0x100;
1715	if (val & 0x10) /* fan 10 */
1716	data->has_fan |= 0x200;
1717	}
1718	if (0x20 == (tmp & 0x30)) {
1719	if (val & 0x20) /* fan 11 */
1720	data->has_fan |= 0x400;
1721	if (val & 0x40) /* fan 12 */
1722	data->has_fan |= 0x800;
1723	}
1724
1725	if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */
1726	data->has_fan |= 0x80;
1727	data->has_pwm |= 0x80;
1728	}
1729
1730	tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1731	if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */
1732	data->has_fan |= 0x100;
1733	}
1734	if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */
1735	data->has_fan |= 0x200;
1736	}
1737	if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */
1738	data->has_fan |= 0x400;
1739	}
1740	if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */
1741	data->has_fan |= 0x800;
1742	}
1743
1744	/* check the temp1-6 mode, ignore former AMDSI selected inputs */
1745	tmp = w83793_read_value(client, reg: W83793_REG_TEMP_MODE[0]);
1746	if (tmp & 0x01)
1747	data->has_temp |= 0x01;
1748	if (tmp & 0x04)
1749	data->has_temp |= 0x02;
1750	if (tmp & 0x10)
1751	data->has_temp |= 0x04;
1752	if (tmp & 0x40)
1753	data->has_temp |= 0x08;
1754
1755	tmp = w83793_read_value(client, reg: W83793_REG_TEMP_MODE[1]);
1756	if (tmp & 0x01)
1757	data->has_temp |= 0x10;
1758	if (tmp & 0x02)
1759	data->has_temp |= 0x20;
1760
1761	/* Register sysfs hooks */
1762	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1763	err = device_create_file(device: dev,
1764	entry: &w83793_sensor_attr_2[i].dev_attr);
1765	if (err)
1766	goto exit_remove;
1767	}
1768
1769	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1770	if (!(data->has_vid & (1 << i)))
1771	continue;
1772	err = device_create_file(device: dev, entry: &w83793_vid[i].dev_attr);
1773	if (err)
1774	goto exit_remove;
1775	}
1776	if (data->has_vid) {
1777	data->vrm = vid_which_vrm();
1778	err = device_create_file(device: dev, entry: &dev_attr_vrm);
1779	if (err)
1780	goto exit_remove;
1781	}
1782
1783	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1784	err = device_create_file(device: dev, entry: &sda_single_files[i].dev_attr);
1785	if (err)
1786	goto exit_remove;
1787
1788	}
1789
1790	for (i = 0; i < 6; i++) {
1791	int j;
1792	if (!(data->has_temp & (1 << i)))
1793	continue;
1794	for (j = 0; j < files_temp; j++) {
1795	err = device_create_file(device: dev,
1796	entry: &w83793_temp[(i) * files_temp
1797	+ j].dev_attr);
1798	if (err)
1799	goto exit_remove;
1800	}
1801	}
1802
1803	for (i = 5; i < 12; i++) {
1804	int j;
1805	if (!(data->has_fan & (1 << i)))
1806	continue;
1807	for (j = 0; j < files_fan; j++) {
1808	err = device_create_file(device: dev,
1809	entry: &w83793_left_fan[(i - 5) * files_fan
1810	+ j].dev_attr);
1811	if (err)
1812	goto exit_remove;
1813	}
1814	}
1815
1816	for (i = 3; i < 8; i++) {
1817	int j;
1818	if (!(data->has_pwm & (1 << i)))
1819	continue;
1820	for (j = 0; j < files_pwm; j++) {
1821	err = device_create_file(device: dev,
1822	entry: &w83793_left_pwm[(i - 3) * files_pwm
1823	+ j].dev_attr);
1824	if (err)
1825	goto exit_remove;
1826	}
1827	}
1828
1829	data->hwmon_dev = hwmon_device_register(dev);
1830	if (IS_ERR(ptr: data->hwmon_dev)) {
1831	err = PTR_ERR(ptr: data->hwmon_dev);
1832	goto exit_remove;
1833	}
1834
1835	/* Watchdog initialization */
1836
1837	/* Register boot notifier */
1838	err = register_reboot_notifier(&watchdog_notifier);
1839	if (err != 0) {
1840	dev_err(&client->dev,
1841	"cannot register reboot notifier (err=%d)\n", err);
1842	goto exit_devunreg;
1843	}
1844
1845	/*
1846	* Enable Watchdog registers.
1847	* Set Configuration Register to Enable Watch Dog Registers
1848	* (Bit 2) = XXXX, X1XX.
1849	*/
1850	tmp = w83793_read_value(client, W83793_REG_CONFIG);
1851	w83793_write_value(client, W83793_REG_CONFIG, value: tmp | 0x04);
1852
1853	/* Set the default watchdog timeout */
1854	data->watchdog_timeout = timeout;
1855
1856	/* Check, if last reboot was caused by watchdog */
1857	data->watchdog_caused_reboot =
1858	w83793_read_value(client: data->client, W83793_REG_WDT_STATUS) & 0x01;
1859
1860	/* Disable Soft Watchdog during initialiation */
1861	watchdog_disable(data);
1862
1863	/*
1864	* We take the data_mutex lock early so that watchdog_open() cannot
1865	* run when misc_register() has completed, but we've not yet added
1866	* our data to the watchdog_data_list (and set the default timeout)
1867	*/
1868	mutex_lock(&watchdog_data_mutex);
1869	for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1870	/* Register our watchdog part */
1871	snprintf(buf: data->watchdog_name, size: sizeof(data->watchdog_name),
1872	fmt: "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1873	data->watchdog_miscdev.name = data->watchdog_name;
1874	data->watchdog_miscdev.fops = &watchdog_fops;
1875	data->watchdog_miscdev.minor = watchdog_minors[i];
1876
1877	err = misc_register(misc: &data->watchdog_miscdev);
1878	if (err == -EBUSY)
1879	continue;
1880	if (err) {
1881	data->watchdog_miscdev.minor = 0;
1882	dev_err(&client->dev,
1883	"Registering watchdog chardev: %d\n", err);
1884	break;
1885	}
1886
1887	list_add(new: &data->list, head: &watchdog_data_list);
1888
1889	dev_info(&client->dev,
1890	"Registered watchdog chardev major 10, minor: %d\n",
1891	watchdog_minors[i]);
1892	break;
1893	}
1894	if (i == ARRAY_SIZE(watchdog_minors)) {
1895	data->watchdog_miscdev.minor = 0;
1896	dev_warn(&client->dev,
1897	"Couldn't register watchdog chardev (due to no free minor)\n");
1898	}
1899
1900	mutex_unlock(lock: &watchdog_data_mutex);
1901
1902	return 0;
1903
1904	/* Unregister hwmon device */
1905
1906	exit_devunreg:
1907
1908	hwmon_device_unregister(dev: data->hwmon_dev);
1909
1910	/* Unregister sysfs hooks */
1911
1912	exit_remove:
1913	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1914	device_remove_file(dev, attr: &w83793_sensor_attr_2[i].dev_attr);
1915
1916	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1917	device_remove_file(dev, attr: &sda_single_files[i].dev_attr);
1918
1919	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1920	device_remove_file(dev, attr: &w83793_vid[i].dev_attr);
1921
1922	for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1923	device_remove_file(dev, attr: &w83793_left_fan[i].dev_attr);
1924
1925	for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1926	device_remove_file(dev, attr: &w83793_left_pwm[i].dev_attr);
1927
1928	for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1929	device_remove_file(dev, attr: &w83793_temp[i].dev_attr);
1930	free_mem:
1931	kfree(objp: data);
1932	exit:
1933	return err;
1934	}
1935
1936	static void w83793_update_nonvolatile(struct device *dev)
1937	{
1938	struct i2c_client *client = to_i2c_client(dev);
1939	struct w83793_data *data = i2c_get_clientdata(client);
1940	int i, j;
1941	/*
1942	* They are somewhat "stable" registers, and to update them every time
1943	* takes so much time, it's just not worthy. Update them in a long
1944	* interval to avoid exception.
1945	*/
1946	if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1947	|| !data->valid))
1948	return;
1949	/* update voltage limits */
1950	for (i = 1; i < 3; i++) {
1951	for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1952	data->in[j][i] =
1953	w83793_read_value(client, reg: W83793_REG_IN[j][i]);
1954	}
1955	data->in_low_bits[i] =
1956	w83793_read_value(client, reg: W83793_REG_IN_LOW_BITS[i]);
1957	}
1958
1959	for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1960	/* Update the Fan measured value and limits */
1961	if (!(data->has_fan & (1 << i)))
1962	continue;
1963	data->fan_min[i] =
1964	w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1965	data->fan_min[i] |=
1966	w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1967	}
1968
1969	for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1970	if (!(data->has_temp & (1 << i)))
1971	continue;
1972	data->temp_fan_map[i] =
1973	w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
1974	for (j = 1; j < 5; j++) {
1975	data->temp[i][j] =
1976	w83793_read_value(client, reg: W83793_REG_TEMP[i][j]);
1977	}
1978	data->temp_cruise[i] =
1979	w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
1980	for (j = 0; j < 7; j++) {
1981	data->sf2_pwm[i][j] =
1982	w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
1983	data->sf2_temp[i][j] =
1984	w83793_read_value(client,
1985	W83793_REG_SF2_TEMP(i, j));
1986	}
1987	}
1988
1989	for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
1990	data->temp_mode[i] =
1991	w83793_read_value(client, reg: W83793_REG_TEMP_MODE[i]);
1992
1993	for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
1994	data->tolerance[i] =
1995	w83793_read_value(client, W83793_REG_TEMP_TOL(i));
1996	}
1997
1998	for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
1999	if (!(data->has_pwm & (1 << i)))
2000	continue;
2001	data->pwm[i][PWM_NONSTOP] =
2002	w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2003	data->pwm[i][PWM_START] =
2004	w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2005	data->pwm_stop_time[i] =
2006	w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2007	}
2008
2009	data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2010	data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2011	data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2012	data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2013	data->temp_critical =
2014	w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2015	data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2016
2017	for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2018	data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2019
2020	data->last_nonvolatile = jiffies;
2021	}
2022
2023	static struct w83793_data *w83793_update_device(struct device *dev)
2024	{
2025	struct i2c_client *client = to_i2c_client(dev);
2026	struct w83793_data *data = i2c_get_clientdata(client);
2027	int i;
2028
2029	mutex_lock(&data->update_lock);
2030
2031	if (!(time_after(jiffies, data->last_updated + HZ * 2)
2032	|| !data->valid))
2033	goto END;
2034
2035	/* Update the voltages measured value and limits */
2036	for (i = 0; i < ARRAY_SIZE(data->in); i++)
2037	data->in[i][IN_READ] =
2038	w83793_read_value(client, reg: W83793_REG_IN[i][IN_READ]);
2039
2040	data->in_low_bits[IN_READ] =
2041	w83793_read_value(client, reg: W83793_REG_IN_LOW_BITS[IN_READ]);
2042
2043	for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2044	if (!(data->has_fan & (1 << i)))
2045	continue;
2046	data->fan[i] =
2047	w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2048	data->fan[i] |=
2049	w83793_read_value(client, W83793_REG_FAN(i) + 1);
2050	}
2051
2052	for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2053	if (!(data->has_temp & (1 << i)))
2054	continue;
2055	data->temp[i][TEMP_READ] =
2056	w83793_read_value(client, reg: W83793_REG_TEMP[i][TEMP_READ]);
2057	}
2058
2059	data->temp_low_bits =
2060	w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2061
2062	for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2063	if (data->has_pwm & (1 << i))
2064	data->pwm[i][PWM_DUTY] =
2065	w83793_read_value(client,
2066	W83793_REG_PWM(i, PWM_DUTY));
2067	}
2068
2069	for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2070	data->alarms[i] =
2071	w83793_read_value(client, W83793_REG_ALARM(i));
2072	if (data->has_vid & 0x01)
2073	data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2074	if (data->has_vid & 0x02)
2075	data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2076	w83793_update_nonvolatile(dev);
2077	data->last_updated = jiffies;
2078	data->valid = true;
2079
2080	END:
2081	mutex_unlock(lock: &data->update_lock);
2082	return data;
2083	}
2084
2085	/*
2086	* Ignore the possibility that somebody change bank outside the driver
2087	* Must be called with data->update_lock held, except during initialization
2088	*/
2089	static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2090	{
2091	struct w83793_data *data = i2c_get_clientdata(client);
2092	u8 res;
2093	u8 new_bank = reg >> 8;
2094
2095	new_bank |= data->bank & 0xfc;
2096	if (data->bank != new_bank) {
2097	if (i2c_smbus_write_byte_data
2098	(client, W83793_REG_BANKSEL, value: new_bank) >= 0)
2099	data->bank = new_bank;
2100	else {
2101	dev_err(&client->dev,
2102	"set bank to %d failed, fall back "
2103	"to bank %d, read reg 0x%x error\n",
2104	new_bank, data->bank, reg);
2105	res = 0x0; /* read 0x0 from the chip */
2106	goto END;
2107	}
2108	}
2109	res = i2c_smbus_read_byte_data(client, command: reg & 0xff);
2110	END:
2111	return res;
2112	}
2113
2114	/* Must be called with data->update_lock held, except during initialization */
2115	static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2116	{
2117	struct w83793_data *data = i2c_get_clientdata(client);
2118	int res;
2119	u8 new_bank = reg >> 8;
2120
2121	new_bank |= data->bank & 0xfc;
2122	if (data->bank != new_bank) {
2123	res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2124	value: new_bank);
2125	if (res < 0) {
2126	dev_err(&client->dev,
2127	"set bank to %d failed, fall back "
2128	"to bank %d, write reg 0x%x error\n",
2129	new_bank, data->bank, reg);
2130	goto END;
2131	}
2132	data->bank = new_bank;
2133	}
2134
2135	res = i2c_smbus_write_byte_data(client, command: reg & 0xff, value);
2136	END:
2137	return res;
2138	}
2139
2140	module_i2c_driver(w83793_driver);
2141
2142	MODULE_AUTHOR("Yuan Mu, Sven Anders");
2143	MODULE_DESCRIPTION("w83793 driver");
2144	MODULE_LICENSE("GPL");
2145