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
FAN_FROM_REG(u16 val)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
FAN_TO_REG(long rpm)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
TIME_FROM_REG(u8 reg)184 static inline unsigned long TIME_FROM_REG(u8 reg)
185 {
186 return reg * 100;
187 }
188
TIME_TO_REG(unsigned long val)189 static inline u8 TIME_TO_REG(unsigned long val)
190 {
191 return clamp_val((val + 50) / 100, 0, 0xff);
192 }
193
TEMP_FROM_REG(s8 reg)194 static inline long TEMP_FROM_REG(s8 reg)
195 {
196 return reg * 1000;
197 }
198
TEMP_TO_REG(long val,s8 min,s8 max)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 i2c_client *lm75[2];
206 struct device *hwmon_dev;
207 struct mutex update_lock;
208 char valid; /* !=0 if following fields are valid */
209 unsigned long last_updated; /* In jiffies */
210 unsigned long last_nonvolatile; /* In jiffies, last time we update the
211 * nonvolatile registers
212 */
213
214 u8 bank;
215 u8 vrm;
216 u8 vid[2];
217 u8 in[10][3]; /* Register value, read/high/low */
218 u8 in_low_bits[3]; /* Additional resolution for VCore A/B Vtt */
219
220 u16 has_fan; /* Only fan1- fan5 has own pins */
221 u16 fan[12]; /* Register value combine */
222 u16 fan_min[12]; /* Register value combine */
223
224 s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */
225 u8 temp_low_bits; /* Additional resolution TD1-TD4 */
226 u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits
227 * byte 1: Temp R1,R2 mode, each has 1 bit
228 */
229 u8 temp_critical; /* If reached all fan will be at full speed */
230 u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */
231
232 u8 has_pwm;
233 u8 has_temp;
234 u8 has_vid;
235 u8 pwm_enable; /* Register value, each Temp has 1 bit */
236 u8 pwm_uptime; /* Register value */
237 u8 pwm_downtime; /* Register value */
238 u8 pwm_default; /* All fan default pwm, next poweron valid */
239 u8 pwm[8][3]; /* Register value */
240 u8 pwm_stop_time[8];
241 u8 temp_cruise[6];
242
243 u8 alarms[5]; /* realtime status registers */
244 u8 beeps[5];
245 u8 beep_enable;
246 u8 tolerance[3]; /* Temp tolerance(Smart Fan I/II) */
247 u8 sf2_pwm[6][7]; /* Smart FanII: Fan duty cycle */
248 u8 sf2_temp[6][7]; /* Smart FanII: Temp level point */
249
250 /* watchdog */
251 struct i2c_client *client;
252 struct mutex watchdog_lock;
253 struct list_head list; /* member of the watchdog_data_list */
254 struct kref kref;
255 struct miscdevice watchdog_miscdev;
256 unsigned long watchdog_is_open;
257 char watchdog_expect_close;
258 char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
259 unsigned int watchdog_caused_reboot;
260 int watchdog_timeout; /* watchdog timeout in minutes */
261 };
262
263 /*
264 * Somewhat ugly :( global data pointer list with all devices, so that
265 * we can find our device data as when using misc_register. There is no
266 * other method to get to one's device data from the open file-op and
267 * for usage in the reboot notifier callback.
268 */
269 static LIST_HEAD(watchdog_data_list);
270
271 /* Note this lock not only protect list access, but also data.kref access */
272 static DEFINE_MUTEX(watchdog_data_mutex);
273
274 /*
275 * Release our data struct when we're detached from the i2c client *and* all
276 * references to our watchdog device are released
277 */
w83793_release_resources(struct kref * ref)278 static void w83793_release_resources(struct kref *ref)
279 {
280 struct w83793_data *data = container_of(ref, struct w83793_data, kref);
281 kfree(data);
282 }
283
284 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
285 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
286 static int w83793_probe(struct i2c_client *client,
287 const struct i2c_device_id *id);
288 static int w83793_detect(struct i2c_client *client,
289 struct i2c_board_info *info);
290 static int w83793_remove(struct i2c_client *client);
291 static void w83793_init_client(struct i2c_client *client);
292 static void w83793_update_nonvolatile(struct device *dev);
293 static struct w83793_data *w83793_update_device(struct device *dev);
294
295 static const struct i2c_device_id w83793_id[] = {
296 { "w83793", 0 },
297 { }
298 };
299 MODULE_DEVICE_TABLE(i2c, w83793_id);
300
301 static struct i2c_driver w83793_driver = {
302 .class = I2C_CLASS_HWMON,
303 .driver = {
304 .name = "w83793",
305 },
306 .probe = w83793_probe,
307 .remove = w83793_remove,
308 .id_table = w83793_id,
309 .detect = w83793_detect,
310 .address_list = normal_i2c,
311 };
312
313 static ssize_t
vrm_show(struct device * dev,struct device_attribute * attr,char * buf)314 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
315 {
316 struct w83793_data *data = dev_get_drvdata(dev);
317 return sprintf(buf, "%d\n", data->vrm);
318 }
319
320 static ssize_t
show_vid(struct device * dev,struct device_attribute * attr,char * buf)321 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
322 {
323 struct w83793_data *data = w83793_update_device(dev);
324 struct sensor_device_attribute_2 *sensor_attr =
325 to_sensor_dev_attr_2(attr);
326 int index = sensor_attr->index;
327
328 return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
329 }
330
331 static ssize_t
vrm_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)332 vrm_store(struct device *dev, struct device_attribute *attr,
333 const char *buf, size_t count)
334 {
335 struct w83793_data *data = dev_get_drvdata(dev);
336 unsigned long val;
337 int err;
338
339 err = kstrtoul(buf, 10, &val);
340 if (err)
341 return err;
342
343 if (val > 255)
344 return -EINVAL;
345
346 data->vrm = val;
347 return count;
348 }
349
350 #define ALARM_STATUS 0
351 #define BEEP_ENABLE 1
352 static ssize_t
show_alarm_beep(struct device * dev,struct device_attribute * attr,char * buf)353 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
354 {
355 struct w83793_data *data = w83793_update_device(dev);
356 struct sensor_device_attribute_2 *sensor_attr =
357 to_sensor_dev_attr_2(attr);
358 int nr = sensor_attr->nr;
359 int index = sensor_attr->index >> 3;
360 int bit = sensor_attr->index & 0x07;
361 u8 val;
362
363 if (nr == ALARM_STATUS) {
364 val = (data->alarms[index] >> (bit)) & 1;
365 } else { /* BEEP_ENABLE */
366 val = (data->beeps[index] >> (bit)) & 1;
367 }
368
369 return sprintf(buf, "%u\n", val);
370 }
371
372 static ssize_t
store_beep(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)373 store_beep(struct device *dev, struct device_attribute *attr,
374 const char *buf, size_t count)
375 {
376 struct i2c_client *client = to_i2c_client(dev);
377 struct w83793_data *data = i2c_get_clientdata(client);
378 struct sensor_device_attribute_2 *sensor_attr =
379 to_sensor_dev_attr_2(attr);
380 int index = sensor_attr->index >> 3;
381 int shift = sensor_attr->index & 0x07;
382 u8 beep_bit = 1 << shift;
383 unsigned long val;
384 int err;
385
386 err = kstrtoul(buf, 10, &val);
387 if (err)
388 return err;
389
390 if (val > 1)
391 return -EINVAL;
392
393 mutex_lock(&data->update_lock);
394 data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
395 data->beeps[index] &= ~beep_bit;
396 data->beeps[index] |= val << shift;
397 w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
398 mutex_unlock(&data->update_lock);
399
400 return count;
401 }
402
403 static ssize_t
show_beep_enable(struct device * dev,struct device_attribute * attr,char * buf)404 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
405 {
406 struct w83793_data *data = w83793_update_device(dev);
407 return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
408 }
409
410 static ssize_t
store_beep_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)411 store_beep_enable(struct device *dev, struct device_attribute *attr,
412 const char *buf, size_t count)
413 {
414 struct i2c_client *client = to_i2c_client(dev);
415 struct w83793_data *data = i2c_get_clientdata(client);
416 unsigned long val;
417 int err;
418
419 err = kstrtoul(buf, 10, &val);
420 if (err)
421 return err;
422
423 if (val > 1)
424 return -EINVAL;
425
426 mutex_lock(&data->update_lock);
427 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
428 & 0xfd;
429 data->beep_enable |= val << 1;
430 w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
431 mutex_unlock(&data->update_lock);
432
433 return count;
434 }
435
436 /* Write 0 to clear chassis alarm */
437 static ssize_t
store_chassis_clear(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)438 store_chassis_clear(struct device *dev,
439 struct device_attribute *attr, const char *buf,
440 size_t count)
441 {
442 struct i2c_client *client = to_i2c_client(dev);
443 struct w83793_data *data = i2c_get_clientdata(client);
444 unsigned long val;
445 u8 reg;
446 int err;
447
448 err = kstrtoul(buf, 10, &val);
449 if (err)
450 return err;
451 if (val)
452 return -EINVAL;
453
454 mutex_lock(&data->update_lock);
455 reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
456 w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
457 data->valid = 0; /* Force cache refresh */
458 mutex_unlock(&data->update_lock);
459 return count;
460 }
461
462 #define FAN_INPUT 0
463 #define FAN_MIN 1
464 static ssize_t
show_fan(struct device * dev,struct device_attribute * attr,char * buf)465 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
466 {
467 struct sensor_device_attribute_2 *sensor_attr =
468 to_sensor_dev_attr_2(attr);
469 int nr = sensor_attr->nr;
470 int index = sensor_attr->index;
471 struct w83793_data *data = w83793_update_device(dev);
472 u16 val;
473
474 if (nr == FAN_INPUT)
475 val = data->fan[index] & 0x0fff;
476 else
477 val = data->fan_min[index] & 0x0fff;
478
479 return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
480 }
481
482 static ssize_t
store_fan_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)483 store_fan_min(struct device *dev, struct device_attribute *attr,
484 const char *buf, size_t count)
485 {
486 struct sensor_device_attribute_2 *sensor_attr =
487 to_sensor_dev_attr_2(attr);
488 int index = sensor_attr->index;
489 struct i2c_client *client = to_i2c_client(dev);
490 struct w83793_data *data = i2c_get_clientdata(client);
491 unsigned long val;
492 int err;
493
494 err = kstrtoul(buf, 10, &val);
495 if (err)
496 return err;
497 val = FAN_TO_REG(val);
498
499 mutex_lock(&data->update_lock);
500 data->fan_min[index] = val;
501 w83793_write_value(client, W83793_REG_FAN_MIN(index),
502 (val >> 8) & 0xff);
503 w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
504 mutex_unlock(&data->update_lock);
505
506 return count;
507 }
508
509 static ssize_t
show_pwm(struct device * dev,struct device_attribute * attr,char * buf)510 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
511 {
512 struct sensor_device_attribute_2 *sensor_attr =
513 to_sensor_dev_attr_2(attr);
514 struct w83793_data *data = w83793_update_device(dev);
515 u16 val;
516 int nr = sensor_attr->nr;
517 int index = sensor_attr->index;
518
519 if (nr == PWM_STOP_TIME)
520 val = TIME_FROM_REG(data->pwm_stop_time[index]);
521 else
522 val = (data->pwm[index][nr] & 0x3f) << 2;
523
524 return sprintf(buf, "%d\n", val);
525 }
526
527 static ssize_t
store_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)528 store_pwm(struct device *dev, struct device_attribute *attr,
529 const char *buf, size_t count)
530 {
531 struct i2c_client *client = to_i2c_client(dev);
532 struct w83793_data *data = i2c_get_clientdata(client);
533 struct sensor_device_attribute_2 *sensor_attr =
534 to_sensor_dev_attr_2(attr);
535 int nr = sensor_attr->nr;
536 int index = sensor_attr->index;
537 unsigned long val;
538 int err;
539
540 err = kstrtoul(buf, 10, &val);
541 if (err)
542 return err;
543
544 mutex_lock(&data->update_lock);
545 if (nr == PWM_STOP_TIME) {
546 val = TIME_TO_REG(val);
547 data->pwm_stop_time[index] = val;
548 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
549 val);
550 } else {
551 val = clamp_val(val, 0, 0xff) >> 2;
552 data->pwm[index][nr] =
553 w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
554 data->pwm[index][nr] |= val;
555 w83793_write_value(client, W83793_REG_PWM(index, nr),
556 data->pwm[index][nr]);
557 }
558
559 mutex_unlock(&data->update_lock);
560 return count;
561 }
562
563 static ssize_t
show_temp(struct device * dev,struct device_attribute * attr,char * buf)564 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
565 {
566 struct sensor_device_attribute_2 *sensor_attr =
567 to_sensor_dev_attr_2(attr);
568 int nr = sensor_attr->nr;
569 int index = sensor_attr->index;
570 struct w83793_data *data = w83793_update_device(dev);
571 long temp = TEMP_FROM_REG(data->temp[index][nr]);
572
573 if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */
574 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
575 temp += temp > 0 ? low : -low;
576 }
577 return sprintf(buf, "%ld\n", temp);
578 }
579
580 static ssize_t
store_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)581 store_temp(struct device *dev, struct device_attribute *attr,
582 const char *buf, size_t count)
583 {
584 struct sensor_device_attribute_2 *sensor_attr =
585 to_sensor_dev_attr_2(attr);
586 int nr = sensor_attr->nr;
587 int index = sensor_attr->index;
588 struct i2c_client *client = to_i2c_client(dev);
589 struct w83793_data *data = i2c_get_clientdata(client);
590 long tmp;
591 int err;
592
593 err = kstrtol(buf, 10, &tmp);
594 if (err)
595 return err;
596
597 mutex_lock(&data->update_lock);
598 data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
599 w83793_write_value(client, W83793_REG_TEMP[index][nr],
600 data->temp[index][nr]);
601 mutex_unlock(&data->update_lock);
602 return count;
603 }
604
605 /*
606 * TD1-TD4
607 * each has 4 mode:(2 bits)
608 * 0: Stop monitor
609 * 1: Use internal temp sensor(default)
610 * 2: Reserved
611 * 3: Use sensor in Intel CPU and get result by PECI
612 *
613 * TR1-TR2
614 * each has 2 mode:(1 bit)
615 * 0: Disable temp sensor monitor
616 * 1: To enable temp sensors monitor
617 */
618
619 /* 0 disable, 6 PECI */
620 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
621
622 static ssize_t
show_temp_mode(struct device * dev,struct device_attribute * attr,char * buf)623 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
624 {
625 struct w83793_data *data = w83793_update_device(dev);
626 struct sensor_device_attribute_2 *sensor_attr =
627 to_sensor_dev_attr_2(attr);
628 int index = sensor_attr->index;
629 u8 mask = (index < 4) ? 0x03 : 0x01;
630 u8 shift = (index < 4) ? (2 * index) : (index - 4);
631 u8 tmp;
632 index = (index < 4) ? 0 : 1;
633
634 tmp = (data->temp_mode[index] >> shift) & mask;
635
636 /* for the internal sensor, found out if diode or thermistor */
637 if (tmp == 1)
638 tmp = index == 0 ? 3 : 4;
639 else
640 tmp = TO_TEMP_MODE[tmp];
641
642 return sprintf(buf, "%d\n", tmp);
643 }
644
645 static ssize_t
store_temp_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)646 store_temp_mode(struct device *dev, struct device_attribute *attr,
647 const char *buf, size_t count)
648 {
649 struct i2c_client *client = to_i2c_client(dev);
650 struct w83793_data *data = i2c_get_clientdata(client);
651 struct sensor_device_attribute_2 *sensor_attr =
652 to_sensor_dev_attr_2(attr);
653 int index = sensor_attr->index;
654 u8 mask = (index < 4) ? 0x03 : 0x01;
655 u8 shift = (index < 4) ? (2 * index) : (index - 4);
656 unsigned long val;
657 int err;
658
659 err = kstrtoul(buf, 10, &val);
660 if (err)
661 return err;
662
663 /* transform the sysfs interface values into table above */
664 if ((val == 6) && (index < 4)) {
665 val -= 3;
666 } else if ((val == 3 && index < 4)
667 || (val == 4 && index >= 4)) {
668 /* transform diode or thermistor into internal enable */
669 val = !!val;
670 } else {
671 return -EINVAL;
672 }
673
674 index = (index < 4) ? 0 : 1;
675 mutex_lock(&data->update_lock);
676 data->temp_mode[index] =
677 w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
678 data->temp_mode[index] &= ~(mask << shift);
679 data->temp_mode[index] |= val << shift;
680 w83793_write_value(client, W83793_REG_TEMP_MODE[index],
681 data->temp_mode[index]);
682 mutex_unlock(&data->update_lock);
683
684 return count;
685 }
686
687 #define SETUP_PWM_DEFAULT 0
688 #define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */
689 #define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */
690 #define SETUP_TEMP_CRITICAL 3
691 static ssize_t
show_sf_setup(struct device * dev,struct device_attribute * attr,char * buf)692 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
693 {
694 struct sensor_device_attribute_2 *sensor_attr =
695 to_sensor_dev_attr_2(attr);
696 int nr = sensor_attr->nr;
697 struct w83793_data *data = w83793_update_device(dev);
698 u32 val = 0;
699
700 if (nr == SETUP_PWM_DEFAULT)
701 val = (data->pwm_default & 0x3f) << 2;
702 else if (nr == SETUP_PWM_UPTIME)
703 val = TIME_FROM_REG(data->pwm_uptime);
704 else if (nr == SETUP_PWM_DOWNTIME)
705 val = TIME_FROM_REG(data->pwm_downtime);
706 else if (nr == SETUP_TEMP_CRITICAL)
707 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
708
709 return sprintf(buf, "%d\n", val);
710 }
711
712 static ssize_t
store_sf_setup(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)713 store_sf_setup(struct device *dev, struct device_attribute *attr,
714 const char *buf, size_t count)
715 {
716 struct sensor_device_attribute_2 *sensor_attr =
717 to_sensor_dev_attr_2(attr);
718 int nr = sensor_attr->nr;
719 struct i2c_client *client = to_i2c_client(dev);
720 struct w83793_data *data = i2c_get_clientdata(client);
721 long val;
722 int err;
723
724 err = kstrtol(buf, 10, &val);
725 if (err)
726 return err;
727
728 mutex_lock(&data->update_lock);
729 if (nr == SETUP_PWM_DEFAULT) {
730 data->pwm_default =
731 w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
732 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
733 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
734 data->pwm_default);
735 } else if (nr == SETUP_PWM_UPTIME) {
736 data->pwm_uptime = TIME_TO_REG(val);
737 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
738 w83793_write_value(client, W83793_REG_PWM_UPTIME,
739 data->pwm_uptime);
740 } else if (nr == SETUP_PWM_DOWNTIME) {
741 data->pwm_downtime = TIME_TO_REG(val);
742 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
743 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
744 data->pwm_downtime);
745 } else { /* SETUP_TEMP_CRITICAL */
746 data->temp_critical =
747 w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
748 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
749 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
750 data->temp_critical);
751 }
752
753 mutex_unlock(&data->update_lock);
754 return count;
755 }
756
757 /*
758 * Temp SmartFan control
759 * TEMP_FAN_MAP
760 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
761 * It's possible two or more temp channels control the same fan, w83793
762 * always prefers to pick the most critical request and applies it to
763 * the related Fan.
764 * It's possible one fan is not in any mapping of 6 temp channels, this
765 * means the fan is manual mode
766 *
767 * TEMP_PWM_ENABLE
768 * Each temp channel has its own SmartFan mode, and temp channel
769 * control fans that are set by TEMP_FAN_MAP
770 * 0: SmartFanII mode
771 * 1: Thermal Cruise Mode
772 *
773 * TEMP_CRUISE
774 * Target temperature in thermal cruise mode, w83793 will try to turn
775 * fan speed to keep the temperature of target device around this
776 * temperature.
777 *
778 * TEMP_TOLERANCE
779 * If Temp higher or lower than target with this tolerance, w83793
780 * will take actions to speed up or slow down the fan to keep the
781 * temperature within the tolerance range.
782 */
783
784 #define TEMP_FAN_MAP 0
785 #define TEMP_PWM_ENABLE 1
786 #define TEMP_CRUISE 2
787 #define TEMP_TOLERANCE 3
788 static ssize_t
show_sf_ctrl(struct device * dev,struct device_attribute * attr,char * buf)789 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
790 {
791 struct sensor_device_attribute_2 *sensor_attr =
792 to_sensor_dev_attr_2(attr);
793 int nr = sensor_attr->nr;
794 int index = sensor_attr->index;
795 struct w83793_data *data = w83793_update_device(dev);
796 u32 val;
797
798 if (nr == TEMP_FAN_MAP) {
799 val = data->temp_fan_map[index];
800 } else if (nr == TEMP_PWM_ENABLE) {
801 /* +2 to transform into 2 and 3 to conform with sysfs intf */
802 val = ((data->pwm_enable >> index) & 0x01) + 2;
803 } else if (nr == TEMP_CRUISE) {
804 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
805 } else { /* TEMP_TOLERANCE */
806 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
807 val = TEMP_FROM_REG(val & 0x0f);
808 }
809 return sprintf(buf, "%d\n", val);
810 }
811
812 static ssize_t
store_sf_ctrl(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)813 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
814 const char *buf, size_t count)
815 {
816 struct sensor_device_attribute_2 *sensor_attr =
817 to_sensor_dev_attr_2(attr);
818 int nr = sensor_attr->nr;
819 int index = sensor_attr->index;
820 struct i2c_client *client = to_i2c_client(dev);
821 struct w83793_data *data = i2c_get_clientdata(client);
822 long val;
823 int err;
824
825 err = kstrtol(buf, 10, &val);
826 if (err)
827 return err;
828
829 mutex_lock(&data->update_lock);
830 if (nr == TEMP_FAN_MAP) {
831 val = clamp_val(val, 0, 255);
832 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
833 data->temp_fan_map[index] = val;
834 } else if (nr == TEMP_PWM_ENABLE) {
835 if (val == 2 || val == 3) {
836 data->pwm_enable =
837 w83793_read_value(client, W83793_REG_PWM_ENABLE);
838 if (val - 2)
839 data->pwm_enable |= 1 << index;
840 else
841 data->pwm_enable &= ~(1 << index);
842 w83793_write_value(client, W83793_REG_PWM_ENABLE,
843 data->pwm_enable);
844 } else {
845 mutex_unlock(&data->update_lock);
846 return -EINVAL;
847 }
848 } else if (nr == TEMP_CRUISE) {
849 data->temp_cruise[index] =
850 w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
851 data->temp_cruise[index] &= 0x80;
852 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
853
854 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
855 data->temp_cruise[index]);
856 } else { /* TEMP_TOLERANCE */
857 int i = index >> 1;
858 u8 shift = (index & 0x01) ? 4 : 0;
859 data->tolerance[i] =
860 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
861
862 data->tolerance[i] &= ~(0x0f << shift);
863 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
864 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
865 data->tolerance[i]);
866 }
867
868 mutex_unlock(&data->update_lock);
869 return count;
870 }
871
872 static ssize_t
show_sf2_pwm(struct device * dev,struct device_attribute * attr,char * buf)873 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
874 {
875 struct sensor_device_attribute_2 *sensor_attr =
876 to_sensor_dev_attr_2(attr);
877 int nr = sensor_attr->nr;
878 int index = sensor_attr->index;
879 struct w83793_data *data = w83793_update_device(dev);
880
881 return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
882 }
883
884 static ssize_t
store_sf2_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)885 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
886 const char *buf, size_t count)
887 {
888 struct i2c_client *client = to_i2c_client(dev);
889 struct w83793_data *data = i2c_get_clientdata(client);
890 struct sensor_device_attribute_2 *sensor_attr =
891 to_sensor_dev_attr_2(attr);
892 int nr = sensor_attr->nr;
893 int index = sensor_attr->index;
894 unsigned long val;
895 int err;
896
897 err = kstrtoul(buf, 10, &val);
898 if (err)
899 return err;
900 val = clamp_val(val, 0, 0xff) >> 2;
901
902 mutex_lock(&data->update_lock);
903 data->sf2_pwm[index][nr] =
904 w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
905 data->sf2_pwm[index][nr] |= val;
906 w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
907 data->sf2_pwm[index][nr]);
908 mutex_unlock(&data->update_lock);
909 return count;
910 }
911
912 static ssize_t
show_sf2_temp(struct device * dev,struct device_attribute * attr,char * buf)913 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
914 {
915 struct sensor_device_attribute_2 *sensor_attr =
916 to_sensor_dev_attr_2(attr);
917 int nr = sensor_attr->nr;
918 int index = sensor_attr->index;
919 struct w83793_data *data = w83793_update_device(dev);
920
921 return sprintf(buf, "%ld\n",
922 TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
923 }
924
925 static ssize_t
store_sf2_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)926 store_sf2_temp(struct device *dev, struct device_attribute *attr,
927 const char *buf, size_t count)
928 {
929 struct i2c_client *client = to_i2c_client(dev);
930 struct w83793_data *data = i2c_get_clientdata(client);
931 struct sensor_device_attribute_2 *sensor_attr =
932 to_sensor_dev_attr_2(attr);
933 int nr = sensor_attr->nr;
934 int index = sensor_attr->index;
935 long val;
936 int err;
937
938 err = kstrtol(buf, 10, &val);
939 if (err)
940 return err;
941 val = TEMP_TO_REG(val, 0, 0x7f);
942
943 mutex_lock(&data->update_lock);
944 data->sf2_temp[index][nr] =
945 w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
946 data->sf2_temp[index][nr] |= val;
947 w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
948 data->sf2_temp[index][nr]);
949 mutex_unlock(&data->update_lock);
950 return count;
951 }
952
953 /* only Vcore A/B and Vtt have additional 2 bits precision */
954 static ssize_t
show_in(struct device * dev,struct device_attribute * attr,char * buf)955 show_in(struct device *dev, struct device_attribute *attr, char *buf)
956 {
957 struct sensor_device_attribute_2 *sensor_attr =
958 to_sensor_dev_attr_2(attr);
959 int nr = sensor_attr->nr;
960 int index = sensor_attr->index;
961 struct w83793_data *data = w83793_update_device(dev);
962 u16 val = data->in[index][nr];
963
964 if (index < 3) {
965 val <<= 2;
966 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
967 }
968 /* voltage inputs 5VDD and 5VSB needs 150mV offset */
969 val = val * scale_in[index] + scale_in_add[index];
970 return sprintf(buf, "%d\n", val);
971 }
972
973 static ssize_t
store_in(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)974 store_in(struct device *dev, struct device_attribute *attr,
975 const char *buf, size_t count)
976 {
977 struct sensor_device_attribute_2 *sensor_attr =
978 to_sensor_dev_attr_2(attr);
979 int nr = sensor_attr->nr;
980 int index = sensor_attr->index;
981 struct i2c_client *client = to_i2c_client(dev);
982 struct w83793_data *data = i2c_get_clientdata(client);
983 unsigned long val;
984 int err;
985
986 err = kstrtoul(buf, 10, &val);
987 if (err)
988 return err;
989 val = (val + scale_in[index] / 2) / scale_in[index];
990
991 mutex_lock(&data->update_lock);
992 if (index > 2) {
993 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
994 if (nr == 1 || nr == 2)
995 val -= scale_in_add[index] / scale_in[index];
996 val = clamp_val(val, 0, 255);
997 } else {
998 val = clamp_val(val, 0, 0x3FF);
999 data->in_low_bits[nr] =
1000 w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1001 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1002 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1003 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1004 data->in_low_bits[nr]);
1005 val >>= 2;
1006 }
1007 data->in[index][nr] = val;
1008 w83793_write_value(client, W83793_REG_IN[index][nr],
1009 data->in[index][nr]);
1010 mutex_unlock(&data->update_lock);
1011 return count;
1012 }
1013
1014 #define NOT_USED -1
1015
1016 #define SENSOR_ATTR_IN(index) \
1017 SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \
1018 IN_READ, index), \
1019 SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \
1020 store_in, IN_MAX, index), \
1021 SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \
1022 store_in, IN_LOW, index), \
1023 SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \
1024 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \
1025 SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \
1026 show_alarm_beep, store_beep, BEEP_ENABLE, \
1027 index + ((index > 2) ? 1 : 0))
1028
1029 #define SENSOR_ATTR_FAN(index) \
1030 SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \
1031 NULL, ALARM_STATUS, index + 17), \
1032 SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \
1033 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \
1034 SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \
1035 NULL, FAN_INPUT, index - 1), \
1036 SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \
1037 show_fan, store_fan_min, FAN_MIN, index - 1)
1038
1039 #define SENSOR_ATTR_PWM(index) \
1040 SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \
1041 store_pwm, PWM_DUTY, index - 1), \
1042 SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \
1043 show_pwm, store_pwm, PWM_NONSTOP, index - 1), \
1044 SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \
1045 show_pwm, store_pwm, PWM_START, index - 1), \
1046 SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \
1047 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1048
1049 #define SENSOR_ATTR_TEMP(index) \
1050 SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \
1051 show_temp_mode, store_temp_mode, NOT_USED, index - 1), \
1052 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \
1053 NULL, TEMP_READ, index - 1), \
1054 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \
1055 store_temp, TEMP_CRIT, index - 1), \
1056 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
1057 show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \
1058 SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1059 store_temp, TEMP_WARN, index - 1), \
1060 SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \
1061 show_temp, store_temp, TEMP_WARN_HYST, index - 1), \
1062 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
1063 show_alarm_beep, NULL, ALARM_STATUS, index + 11), \
1064 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
1065 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \
1066 SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \
1067 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \
1068 TEMP_FAN_MAP, index - 1), \
1069 SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
1070 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \
1071 index - 1), \
1072 SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \
1073 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \
1074 SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1075 store_sf_ctrl, TEMP_TOLERANCE, index - 1), \
1076 SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1077 show_sf2_pwm, store_sf2_pwm, 0, index - 1), \
1078 SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1079 show_sf2_pwm, store_sf2_pwm, 1, index - 1), \
1080 SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1081 show_sf2_pwm, store_sf2_pwm, 2, index - 1), \
1082 SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1083 show_sf2_pwm, store_sf2_pwm, 3, index - 1), \
1084 SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1085 show_sf2_pwm, store_sf2_pwm, 4, index - 1), \
1086 SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1087 show_sf2_pwm, store_sf2_pwm, 5, index - 1), \
1088 SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1089 show_sf2_pwm, store_sf2_pwm, 6, index - 1), \
1090 SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1091 show_sf2_temp, store_sf2_temp, 0, index - 1), \
1092 SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1093 show_sf2_temp, store_sf2_temp, 1, index - 1), \
1094 SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1095 show_sf2_temp, store_sf2_temp, 2, index - 1), \
1096 SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1097 show_sf2_temp, store_sf2_temp, 3, index - 1), \
1098 SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1099 show_sf2_temp, store_sf2_temp, 4, index - 1), \
1100 SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1101 show_sf2_temp, store_sf2_temp, 5, index - 1), \
1102 SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1103 show_sf2_temp, store_sf2_temp, 6, index - 1)
1104
1105 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1106 SENSOR_ATTR_IN(0),
1107 SENSOR_ATTR_IN(1),
1108 SENSOR_ATTR_IN(2),
1109 SENSOR_ATTR_IN(3),
1110 SENSOR_ATTR_IN(4),
1111 SENSOR_ATTR_IN(5),
1112 SENSOR_ATTR_IN(6),
1113 SENSOR_ATTR_IN(7),
1114 SENSOR_ATTR_IN(8),
1115 SENSOR_ATTR_IN(9),
1116 SENSOR_ATTR_FAN(1),
1117 SENSOR_ATTR_FAN(2),
1118 SENSOR_ATTR_FAN(3),
1119 SENSOR_ATTR_FAN(4),
1120 SENSOR_ATTR_FAN(5),
1121 SENSOR_ATTR_PWM(1),
1122 SENSOR_ATTR_PWM(2),
1123 SENSOR_ATTR_PWM(3),
1124 };
1125
1126 static struct sensor_device_attribute_2 w83793_temp[] = {
1127 SENSOR_ATTR_TEMP(1),
1128 SENSOR_ATTR_TEMP(2),
1129 SENSOR_ATTR_TEMP(3),
1130 SENSOR_ATTR_TEMP(4),
1131 SENSOR_ATTR_TEMP(5),
1132 SENSOR_ATTR_TEMP(6),
1133 };
1134
1135 /* Fan6-Fan12 */
1136 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1137 SENSOR_ATTR_FAN(6),
1138 SENSOR_ATTR_FAN(7),
1139 SENSOR_ATTR_FAN(8),
1140 SENSOR_ATTR_FAN(9),
1141 SENSOR_ATTR_FAN(10),
1142 SENSOR_ATTR_FAN(11),
1143 SENSOR_ATTR_FAN(12),
1144 };
1145
1146 /* Pwm4-Pwm8 */
1147 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1148 SENSOR_ATTR_PWM(4),
1149 SENSOR_ATTR_PWM(5),
1150 SENSOR_ATTR_PWM(6),
1151 SENSOR_ATTR_PWM(7),
1152 SENSOR_ATTR_PWM(8),
1153 };
1154
1155 static struct sensor_device_attribute_2 w83793_vid[] = {
1156 SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1157 SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1158 };
1159 static DEVICE_ATTR_RW(vrm);
1160
1161 static struct sensor_device_attribute_2 sda_single_files[] = {
1162 SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1163 store_chassis_clear, ALARM_STATUS, 30),
1164 SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1165 store_beep_enable, NOT_USED, NOT_USED),
1166 SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1167 store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1168 SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1169 store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1170 SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1171 store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1172 SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1173 store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1174 };
1175
w83793_init_client(struct i2c_client * client)1176 static void w83793_init_client(struct i2c_client *client)
1177 {
1178 if (reset)
1179 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1180
1181 /* Start monitoring */
1182 w83793_write_value(client, W83793_REG_CONFIG,
1183 w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1184 }
1185
1186 /*
1187 * Watchdog routines
1188 */
1189
watchdog_set_timeout(struct w83793_data * data,int timeout)1190 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1191 {
1192 unsigned int mtimeout;
1193 int ret;
1194
1195 mtimeout = DIV_ROUND_UP(timeout, 60);
1196
1197 if (mtimeout > 255)
1198 return -EINVAL;
1199
1200 mutex_lock(&data->watchdog_lock);
1201 if (!data->client) {
1202 ret = -ENODEV;
1203 goto leave;
1204 }
1205
1206 data->watchdog_timeout = mtimeout;
1207
1208 /* Set Timeout value (in Minutes) */
1209 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1210 data->watchdog_timeout);
1211
1212 ret = mtimeout * 60;
1213
1214 leave:
1215 mutex_unlock(&data->watchdog_lock);
1216 return ret;
1217 }
1218
watchdog_get_timeout(struct w83793_data * data)1219 static int watchdog_get_timeout(struct w83793_data *data)
1220 {
1221 int timeout;
1222
1223 mutex_lock(&data->watchdog_lock);
1224 timeout = data->watchdog_timeout * 60;
1225 mutex_unlock(&data->watchdog_lock);
1226
1227 return timeout;
1228 }
1229
watchdog_trigger(struct w83793_data * data)1230 static int watchdog_trigger(struct w83793_data *data)
1231 {
1232 int ret = 0;
1233
1234 mutex_lock(&data->watchdog_lock);
1235 if (!data->client) {
1236 ret = -ENODEV;
1237 goto leave;
1238 }
1239
1240 /* Set Timeout value (in Minutes) */
1241 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1242 data->watchdog_timeout);
1243
1244 leave:
1245 mutex_unlock(&data->watchdog_lock);
1246 return ret;
1247 }
1248
watchdog_enable(struct w83793_data * data)1249 static int watchdog_enable(struct w83793_data *data)
1250 {
1251 int ret = 0;
1252
1253 mutex_lock(&data->watchdog_lock);
1254 if (!data->client) {
1255 ret = -ENODEV;
1256 goto leave;
1257 }
1258
1259 /* Set initial timeout */
1260 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1261 data->watchdog_timeout);
1262
1263 /* Enable Soft Watchdog */
1264 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1265
1266 leave:
1267 mutex_unlock(&data->watchdog_lock);
1268 return ret;
1269 }
1270
watchdog_disable(struct w83793_data * data)1271 static int watchdog_disable(struct w83793_data *data)
1272 {
1273 int ret = 0;
1274
1275 mutex_lock(&data->watchdog_lock);
1276 if (!data->client) {
1277 ret = -ENODEV;
1278 goto leave;
1279 }
1280
1281 /* Disable Soft Watchdog */
1282 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1283
1284 leave:
1285 mutex_unlock(&data->watchdog_lock);
1286 return ret;
1287 }
1288
watchdog_open(struct inode * inode,struct file * filp)1289 static int watchdog_open(struct inode *inode, struct file *filp)
1290 {
1291 struct w83793_data *pos, *data = NULL;
1292 int watchdog_is_open;
1293
1294 /*
1295 * We get called from drivers/char/misc.c with misc_mtx hold, and we
1296 * call misc_register() from w83793_probe() with watchdog_data_mutex
1297 * hold, as misc_register() takes the misc_mtx lock, this is a possible
1298 * deadlock, so we use mutex_trylock here.
1299 */
1300 if (!mutex_trylock(&watchdog_data_mutex))
1301 return -ERESTARTSYS;
1302 list_for_each_entry(pos, &watchdog_data_list, list) {
1303 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1304 data = pos;
1305 break;
1306 }
1307 }
1308
1309 /* Check, if device is already open */
1310 watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1311
1312 /*
1313 * Increase data reference counter (if not already done).
1314 * Note we can never not have found data, so we don't check for this
1315 */
1316 if (!watchdog_is_open)
1317 kref_get(&data->kref);
1318
1319 mutex_unlock(&watchdog_data_mutex);
1320
1321 /* Check, if device is already open and possibly issue error */
1322 if (watchdog_is_open)
1323 return -EBUSY;
1324
1325 /* Enable Soft Watchdog */
1326 watchdog_enable(data);
1327
1328 /* Store pointer to data into filp's private data */
1329 filp->private_data = data;
1330
1331 return stream_open(inode, filp);
1332 }
1333
watchdog_close(struct inode * inode,struct file * filp)1334 static int watchdog_close(struct inode *inode, struct file *filp)
1335 {
1336 struct w83793_data *data = filp->private_data;
1337
1338 if (data->watchdog_expect_close) {
1339 watchdog_disable(data);
1340 data->watchdog_expect_close = 0;
1341 } else {
1342 watchdog_trigger(data);
1343 dev_crit(&data->client->dev,
1344 "unexpected close, not stopping watchdog!\n");
1345 }
1346
1347 clear_bit(0, &data->watchdog_is_open);
1348
1349 /* Decrease data reference counter */
1350 mutex_lock(&watchdog_data_mutex);
1351 kref_put(&data->kref, w83793_release_resources);
1352 mutex_unlock(&watchdog_data_mutex);
1353
1354 return 0;
1355 }
1356
watchdog_write(struct file * filp,const char __user * buf,size_t count,loff_t * offset)1357 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1358 size_t count, loff_t *offset)
1359 {
1360 ssize_t ret;
1361 struct w83793_data *data = filp->private_data;
1362
1363 if (count) {
1364 if (!nowayout) {
1365 size_t i;
1366
1367 /* Clear it in case it was set with a previous write */
1368 data->watchdog_expect_close = 0;
1369
1370 for (i = 0; i != count; i++) {
1371 char c;
1372 if (get_user(c, buf + i))
1373 return -EFAULT;
1374 if (c == 'V')
1375 data->watchdog_expect_close = 1;
1376 }
1377 }
1378 ret = watchdog_trigger(data);
1379 if (ret < 0)
1380 return ret;
1381 }
1382 return count;
1383 }
1384
watchdog_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1385 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1386 unsigned long arg)
1387 {
1388 struct watchdog_info ident = {
1389 .options = WDIOF_KEEPALIVEPING |
1390 WDIOF_SETTIMEOUT |
1391 WDIOF_CARDRESET,
1392 .identity = "w83793 watchdog"
1393 };
1394
1395 int val, ret = 0;
1396 struct w83793_data *data = filp->private_data;
1397
1398 switch (cmd) {
1399 case WDIOC_GETSUPPORT:
1400 if (!nowayout)
1401 ident.options |= WDIOF_MAGICCLOSE;
1402 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1403 ret = -EFAULT;
1404 break;
1405
1406 case WDIOC_GETSTATUS:
1407 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1408 ret = put_user(val, (int __user *)arg);
1409 break;
1410
1411 case WDIOC_GETBOOTSTATUS:
1412 ret = put_user(0, (int __user *)arg);
1413 break;
1414
1415 case WDIOC_KEEPALIVE:
1416 ret = watchdog_trigger(data);
1417 break;
1418
1419 case WDIOC_GETTIMEOUT:
1420 val = watchdog_get_timeout(data);
1421 ret = put_user(val, (int __user *)arg);
1422 break;
1423
1424 case WDIOC_SETTIMEOUT:
1425 if (get_user(val, (int __user *)arg)) {
1426 ret = -EFAULT;
1427 break;
1428 }
1429 ret = watchdog_set_timeout(data, val);
1430 if (ret > 0)
1431 ret = put_user(ret, (int __user *)arg);
1432 break;
1433
1434 case WDIOC_SETOPTIONS:
1435 if (get_user(val, (int __user *)arg)) {
1436 ret = -EFAULT;
1437 break;
1438 }
1439
1440 if (val & WDIOS_DISABLECARD)
1441 ret = watchdog_disable(data);
1442 else if (val & WDIOS_ENABLECARD)
1443 ret = watchdog_enable(data);
1444 else
1445 ret = -EINVAL;
1446
1447 break;
1448 default:
1449 ret = -ENOTTY;
1450 }
1451 return ret;
1452 }
1453
1454 static const struct file_operations watchdog_fops = {
1455 .owner = THIS_MODULE,
1456 .llseek = no_llseek,
1457 .open = watchdog_open,
1458 .release = watchdog_close,
1459 .write = watchdog_write,
1460 .unlocked_ioctl = watchdog_ioctl,
1461 };
1462
1463 /*
1464 * Notifier for system down
1465 */
1466
watchdog_notify_sys(struct notifier_block * this,unsigned long code,void * unused)1467 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1468 void *unused)
1469 {
1470 struct w83793_data *data = NULL;
1471
1472 if (code == SYS_DOWN || code == SYS_HALT) {
1473
1474 /* Disable each registered watchdog */
1475 mutex_lock(&watchdog_data_mutex);
1476 list_for_each_entry(data, &watchdog_data_list, list) {
1477 if (data->watchdog_miscdev.minor)
1478 watchdog_disable(data);
1479 }
1480 mutex_unlock(&watchdog_data_mutex);
1481 }
1482
1483 return NOTIFY_DONE;
1484 }
1485
1486 /*
1487 * The WDT needs to learn about soft shutdowns in order to
1488 * turn the timebomb registers off.
1489 */
1490
1491 static struct notifier_block watchdog_notifier = {
1492 .notifier_call = watchdog_notify_sys,
1493 };
1494
1495 /*
1496 * Init / remove routines
1497 */
1498
w83793_remove(struct i2c_client * client)1499 static int w83793_remove(struct i2c_client *client)
1500 {
1501 struct w83793_data *data = i2c_get_clientdata(client);
1502 struct device *dev = &client->dev;
1503 int i, tmp;
1504
1505 /* Unregister the watchdog (if registered) */
1506 if (data->watchdog_miscdev.minor) {
1507 misc_deregister(&data->watchdog_miscdev);
1508
1509 if (data->watchdog_is_open) {
1510 dev_warn(&client->dev,
1511 "i2c client detached with watchdog open! "
1512 "Stopping watchdog.\n");
1513 watchdog_disable(data);
1514 }
1515
1516 mutex_lock(&watchdog_data_mutex);
1517 list_del(&data->list);
1518 mutex_unlock(&watchdog_data_mutex);
1519
1520 /* Tell the watchdog code the client is gone */
1521 mutex_lock(&data->watchdog_lock);
1522 data->client = NULL;
1523 mutex_unlock(&data->watchdog_lock);
1524 }
1525
1526 /* Reset Configuration Register to Disable Watch Dog Registers */
1527 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1528 w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1529
1530 unregister_reboot_notifier(&watchdog_notifier);
1531
1532 hwmon_device_unregister(data->hwmon_dev);
1533
1534 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1535 device_remove_file(dev,
1536 &w83793_sensor_attr_2[i].dev_attr);
1537
1538 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1539 device_remove_file(dev, &sda_single_files[i].dev_attr);
1540
1541 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1542 device_remove_file(dev, &w83793_vid[i].dev_attr);
1543 device_remove_file(dev, &dev_attr_vrm);
1544
1545 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1546 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1547
1548 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1549 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1550
1551 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1552 device_remove_file(dev, &w83793_temp[i].dev_attr);
1553
1554 /* Decrease data reference counter */
1555 mutex_lock(&watchdog_data_mutex);
1556 kref_put(&data->kref, w83793_release_resources);
1557 mutex_unlock(&watchdog_data_mutex);
1558
1559 return 0;
1560 }
1561
1562 static int
w83793_detect_subclients(struct i2c_client * client)1563 w83793_detect_subclients(struct i2c_client *client)
1564 {
1565 int i, id;
1566 int address = client->addr;
1567 u8 tmp;
1568 struct i2c_adapter *adapter = client->adapter;
1569 struct w83793_data *data = i2c_get_clientdata(client);
1570
1571 id = i2c_adapter_id(adapter);
1572 if (force_subclients[0] == id && force_subclients[1] == address) {
1573 for (i = 2; i <= 3; i++) {
1574 if (force_subclients[i] < 0x48
1575 || force_subclients[i] > 0x4f) {
1576 dev_err(&client->dev,
1577 "invalid subclient "
1578 "address %d; must be 0x48-0x4f\n",
1579 force_subclients[i]);
1580 return -EINVAL;
1581 }
1582 }
1583 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1584 (force_subclients[2] & 0x07) |
1585 ((force_subclients[3] & 0x07) << 4));
1586 }
1587
1588 tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1589 if (!(tmp & 0x08))
1590 data->lm75[0] = devm_i2c_new_dummy_device(&client->dev, adapter,
1591 0x48 + (tmp & 0x7));
1592 if (!(tmp & 0x80)) {
1593 if (!IS_ERR(data->lm75[0])
1594 && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1595 dev_err(&client->dev,
1596 "duplicate addresses 0x%x, "
1597 "use force_subclients\n", data->lm75[0]->addr);
1598 return -ENODEV;
1599 }
1600 data->lm75[1] = devm_i2c_new_dummy_device(&client->dev, adapter,
1601 0x48 + ((tmp >> 4) & 0x7));
1602 }
1603
1604 return 0;
1605 }
1606
1607 /* Return 0 if detection is successful, -ENODEV otherwise */
w83793_detect(struct i2c_client * client,struct i2c_board_info * info)1608 static int w83793_detect(struct i2c_client *client,
1609 struct i2c_board_info *info)
1610 {
1611 u8 tmp, bank, chip_id;
1612 struct i2c_adapter *adapter = client->adapter;
1613 unsigned short address = client->addr;
1614
1615 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1616 return -ENODEV;
1617
1618 bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1619
1620 tmp = bank & 0x80 ? 0x5c : 0xa3;
1621 /* Check Winbond vendor ID */
1622 if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1623 pr_debug("w83793: Detection failed at check vendor id\n");
1624 return -ENODEV;
1625 }
1626
1627 /*
1628 * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1629 * should match
1630 */
1631 if ((bank & 0x07) == 0
1632 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1633 (address << 1)) {
1634 pr_debug("w83793: Detection failed at check i2c addr\n");
1635 return -ENODEV;
1636 }
1637
1638 /* Determine the chip type now */
1639 chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1640 if (chip_id != 0x7b)
1641 return -ENODEV;
1642
1643 strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1644
1645 return 0;
1646 }
1647
w83793_probe(struct i2c_client * client,const struct i2c_device_id * id)1648 static int w83793_probe(struct i2c_client *client,
1649 const struct i2c_device_id *id)
1650 {
1651 struct device *dev = &client->dev;
1652 static const int watchdog_minors[] = {
1653 WATCHDOG_MINOR, 212, 213, 214, 215
1654 };
1655 struct w83793_data *data;
1656 int i, tmp, val, err;
1657 int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1658 int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1659 int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1660
1661 data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1662 if (!data) {
1663 err = -ENOMEM;
1664 goto exit;
1665 }
1666
1667 i2c_set_clientdata(client, data);
1668 data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1669 mutex_init(&data->update_lock);
1670 mutex_init(&data->watchdog_lock);
1671 INIT_LIST_HEAD(&data->list);
1672 kref_init(&data->kref);
1673
1674 /*
1675 * Store client pointer in our data struct for watchdog usage
1676 * (where the client is found through a data ptr instead of the
1677 * otherway around)
1678 */
1679 data->client = client;
1680
1681 err = w83793_detect_subclients(client);
1682 if (err)
1683 goto free_mem;
1684
1685 /* Initialize the chip */
1686 w83793_init_client(client);
1687
1688 /*
1689 * Only fan 1-5 has their own input pins,
1690 * Pwm 1-3 has their own pins
1691 */
1692 data->has_fan = 0x1f;
1693 data->has_pwm = 0x07;
1694 tmp = w83793_read_value(client, W83793_REG_MFC);
1695 val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1696
1697 /* check the function of pins 49-56 */
1698 if (tmp & 0x80) {
1699 data->has_vid |= 0x2; /* has VIDB */
1700 } else {
1701 data->has_pwm |= 0x18; /* pwm 4,5 */
1702 if (val & 0x01) { /* fan 6 */
1703 data->has_fan |= 0x20;
1704 data->has_pwm |= 0x20;
1705 }
1706 if (val & 0x02) { /* fan 7 */
1707 data->has_fan |= 0x40;
1708 data->has_pwm |= 0x40;
1709 }
1710 if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */
1711 data->has_fan |= 0x80;
1712 data->has_pwm |= 0x80;
1713 }
1714 }
1715
1716 /* check the function of pins 37-40 */
1717 if (!(tmp & 0x29))
1718 data->has_vid |= 0x1; /* has VIDA */
1719 if (0x08 == (tmp & 0x0c)) {
1720 if (val & 0x08) /* fan 9 */
1721 data->has_fan |= 0x100;
1722 if (val & 0x10) /* fan 10 */
1723 data->has_fan |= 0x200;
1724 }
1725 if (0x20 == (tmp & 0x30)) {
1726 if (val & 0x20) /* fan 11 */
1727 data->has_fan |= 0x400;
1728 if (val & 0x40) /* fan 12 */
1729 data->has_fan |= 0x800;
1730 }
1731
1732 if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */
1733 data->has_fan |= 0x80;
1734 data->has_pwm |= 0x80;
1735 }
1736
1737 tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1738 if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */
1739 data->has_fan |= 0x100;
1740 }
1741 if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */
1742 data->has_fan |= 0x200;
1743 }
1744 if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */
1745 data->has_fan |= 0x400;
1746 }
1747 if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */
1748 data->has_fan |= 0x800;
1749 }
1750
1751 /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1752 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1753 if (tmp & 0x01)
1754 data->has_temp |= 0x01;
1755 if (tmp & 0x04)
1756 data->has_temp |= 0x02;
1757 if (tmp & 0x10)
1758 data->has_temp |= 0x04;
1759 if (tmp & 0x40)
1760 data->has_temp |= 0x08;
1761
1762 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1763 if (tmp & 0x01)
1764 data->has_temp |= 0x10;
1765 if (tmp & 0x02)
1766 data->has_temp |= 0x20;
1767
1768 /* Register sysfs hooks */
1769 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1770 err = device_create_file(dev,
1771 &w83793_sensor_attr_2[i].dev_attr);
1772 if (err)
1773 goto exit_remove;
1774 }
1775
1776 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1777 if (!(data->has_vid & (1 << i)))
1778 continue;
1779 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1780 if (err)
1781 goto exit_remove;
1782 }
1783 if (data->has_vid) {
1784 data->vrm = vid_which_vrm();
1785 err = device_create_file(dev, &dev_attr_vrm);
1786 if (err)
1787 goto exit_remove;
1788 }
1789
1790 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1791 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1792 if (err)
1793 goto exit_remove;
1794
1795 }
1796
1797 for (i = 0; i < 6; i++) {
1798 int j;
1799 if (!(data->has_temp & (1 << i)))
1800 continue;
1801 for (j = 0; j < files_temp; j++) {
1802 err = device_create_file(dev,
1803 &w83793_temp[(i) * files_temp
1804 + j].dev_attr);
1805 if (err)
1806 goto exit_remove;
1807 }
1808 }
1809
1810 for (i = 5; i < 12; i++) {
1811 int j;
1812 if (!(data->has_fan & (1 << i)))
1813 continue;
1814 for (j = 0; j < files_fan; j++) {
1815 err = device_create_file(dev,
1816 &w83793_left_fan[(i - 5) * files_fan
1817 + j].dev_attr);
1818 if (err)
1819 goto exit_remove;
1820 }
1821 }
1822
1823 for (i = 3; i < 8; i++) {
1824 int j;
1825 if (!(data->has_pwm & (1 << i)))
1826 continue;
1827 for (j = 0; j < files_pwm; j++) {
1828 err = device_create_file(dev,
1829 &w83793_left_pwm[(i - 3) * files_pwm
1830 + j].dev_attr);
1831 if (err)
1832 goto exit_remove;
1833 }
1834 }
1835
1836 data->hwmon_dev = hwmon_device_register(dev);
1837 if (IS_ERR(data->hwmon_dev)) {
1838 err = PTR_ERR(data->hwmon_dev);
1839 goto exit_remove;
1840 }
1841
1842 /* Watchdog initialization */
1843
1844 /* Register boot notifier */
1845 err = register_reboot_notifier(&watchdog_notifier);
1846 if (err != 0) {
1847 dev_err(&client->dev,
1848 "cannot register reboot notifier (err=%d)\n", err);
1849 goto exit_devunreg;
1850 }
1851
1852 /*
1853 * Enable Watchdog registers.
1854 * Set Configuration Register to Enable Watch Dog Registers
1855 * (Bit 2) = XXXX, X1XX.
1856 */
1857 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1858 w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1859
1860 /* Set the default watchdog timeout */
1861 data->watchdog_timeout = timeout;
1862
1863 /* Check, if last reboot was caused by watchdog */
1864 data->watchdog_caused_reboot =
1865 w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1866
1867 /* Disable Soft Watchdog during initialiation */
1868 watchdog_disable(data);
1869
1870 /*
1871 * We take the data_mutex lock early so that watchdog_open() cannot
1872 * run when misc_register() has completed, but we've not yet added
1873 * our data to the watchdog_data_list (and set the default timeout)
1874 */
1875 mutex_lock(&watchdog_data_mutex);
1876 for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1877 /* Register our watchdog part */
1878 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1879 "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1880 data->watchdog_miscdev.name = data->watchdog_name;
1881 data->watchdog_miscdev.fops = &watchdog_fops;
1882 data->watchdog_miscdev.minor = watchdog_minors[i];
1883
1884 err = misc_register(&data->watchdog_miscdev);
1885 if (err == -EBUSY)
1886 continue;
1887 if (err) {
1888 data->watchdog_miscdev.minor = 0;
1889 dev_err(&client->dev,
1890 "Registering watchdog chardev: %d\n", err);
1891 break;
1892 }
1893
1894 list_add(&data->list, &watchdog_data_list);
1895
1896 dev_info(&client->dev,
1897 "Registered watchdog chardev major 10, minor: %d\n",
1898 watchdog_minors[i]);
1899 break;
1900 }
1901 if (i == ARRAY_SIZE(watchdog_minors)) {
1902 data->watchdog_miscdev.minor = 0;
1903 dev_warn(&client->dev,
1904 "Couldn't register watchdog chardev (due to no free minor)\n");
1905 }
1906
1907 mutex_unlock(&watchdog_data_mutex);
1908
1909 return 0;
1910
1911 /* Unregister hwmon device */
1912
1913 exit_devunreg:
1914
1915 hwmon_device_unregister(data->hwmon_dev);
1916
1917 /* Unregister sysfs hooks */
1918
1919 exit_remove:
1920 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1921 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1922
1923 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1924 device_remove_file(dev, &sda_single_files[i].dev_attr);
1925
1926 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1927 device_remove_file(dev, &w83793_vid[i].dev_attr);
1928
1929 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1930 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1931
1932 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1933 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1934
1935 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1936 device_remove_file(dev, &w83793_temp[i].dev_attr);
1937 free_mem:
1938 kfree(data);
1939 exit:
1940 return err;
1941 }
1942
w83793_update_nonvolatile(struct device * dev)1943 static void w83793_update_nonvolatile(struct device *dev)
1944 {
1945 struct i2c_client *client = to_i2c_client(dev);
1946 struct w83793_data *data = i2c_get_clientdata(client);
1947 int i, j;
1948 /*
1949 * They are somewhat "stable" registers, and to update them every time
1950 * takes so much time, it's just not worthy. Update them in a long
1951 * interval to avoid exception.
1952 */
1953 if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1954 || !data->valid))
1955 return;
1956 /* update voltage limits */
1957 for (i = 1; i < 3; i++) {
1958 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1959 data->in[j][i] =
1960 w83793_read_value(client, W83793_REG_IN[j][i]);
1961 }
1962 data->in_low_bits[i] =
1963 w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1964 }
1965
1966 for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1967 /* Update the Fan measured value and limits */
1968 if (!(data->has_fan & (1 << i)))
1969 continue;
1970 data->fan_min[i] =
1971 w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1972 data->fan_min[i] |=
1973 w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1974 }
1975
1976 for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1977 if (!(data->has_temp & (1 << i)))
1978 continue;
1979 data->temp_fan_map[i] =
1980 w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
1981 for (j = 1; j < 5; j++) {
1982 data->temp[i][j] =
1983 w83793_read_value(client, W83793_REG_TEMP[i][j]);
1984 }
1985 data->temp_cruise[i] =
1986 w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
1987 for (j = 0; j < 7; j++) {
1988 data->sf2_pwm[i][j] =
1989 w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
1990 data->sf2_temp[i][j] =
1991 w83793_read_value(client,
1992 W83793_REG_SF2_TEMP(i, j));
1993 }
1994 }
1995
1996 for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
1997 data->temp_mode[i] =
1998 w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
1999
2000 for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2001 data->tolerance[i] =
2002 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2003 }
2004
2005 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2006 if (!(data->has_pwm & (1 << i)))
2007 continue;
2008 data->pwm[i][PWM_NONSTOP] =
2009 w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2010 data->pwm[i][PWM_START] =
2011 w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2012 data->pwm_stop_time[i] =
2013 w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2014 }
2015
2016 data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2017 data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2018 data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2019 data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2020 data->temp_critical =
2021 w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2022 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2023
2024 for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2025 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2026
2027 data->last_nonvolatile = jiffies;
2028 }
2029
w83793_update_device(struct device * dev)2030 static struct w83793_data *w83793_update_device(struct device *dev)
2031 {
2032 struct i2c_client *client = to_i2c_client(dev);
2033 struct w83793_data *data = i2c_get_clientdata(client);
2034 int i;
2035
2036 mutex_lock(&data->update_lock);
2037
2038 if (!(time_after(jiffies, data->last_updated + HZ * 2)
2039 || !data->valid))
2040 goto END;
2041
2042 /* Update the voltages measured value and limits */
2043 for (i = 0; i < ARRAY_SIZE(data->in); i++)
2044 data->in[i][IN_READ] =
2045 w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2046
2047 data->in_low_bits[IN_READ] =
2048 w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2049
2050 for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2051 if (!(data->has_fan & (1 << i)))
2052 continue;
2053 data->fan[i] =
2054 w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2055 data->fan[i] |=
2056 w83793_read_value(client, W83793_REG_FAN(i) + 1);
2057 }
2058
2059 for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2060 if (!(data->has_temp & (1 << i)))
2061 continue;
2062 data->temp[i][TEMP_READ] =
2063 w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2064 }
2065
2066 data->temp_low_bits =
2067 w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2068
2069 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2070 if (data->has_pwm & (1 << i))
2071 data->pwm[i][PWM_DUTY] =
2072 w83793_read_value(client,
2073 W83793_REG_PWM(i, PWM_DUTY));
2074 }
2075
2076 for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2077 data->alarms[i] =
2078 w83793_read_value(client, W83793_REG_ALARM(i));
2079 if (data->has_vid & 0x01)
2080 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2081 if (data->has_vid & 0x02)
2082 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2083 w83793_update_nonvolatile(dev);
2084 data->last_updated = jiffies;
2085 data->valid = 1;
2086
2087 END:
2088 mutex_unlock(&data->update_lock);
2089 return data;
2090 }
2091
2092 /*
2093 * Ignore the possibility that somebody change bank outside the driver
2094 * Must be called with data->update_lock held, except during initialization
2095 */
w83793_read_value(struct i2c_client * client,u16 reg)2096 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2097 {
2098 struct w83793_data *data = i2c_get_clientdata(client);
2099 u8 res = 0xff;
2100 u8 new_bank = reg >> 8;
2101
2102 new_bank |= data->bank & 0xfc;
2103 if (data->bank != new_bank) {
2104 if (i2c_smbus_write_byte_data
2105 (client, W83793_REG_BANKSEL, new_bank) >= 0)
2106 data->bank = new_bank;
2107 else {
2108 dev_err(&client->dev,
2109 "set bank to %d failed, fall back "
2110 "to bank %d, read reg 0x%x error\n",
2111 new_bank, data->bank, reg);
2112 res = 0x0; /* read 0x0 from the chip */
2113 goto END;
2114 }
2115 }
2116 res = i2c_smbus_read_byte_data(client, reg & 0xff);
2117 END:
2118 return res;
2119 }
2120
2121 /* Must be called with data->update_lock held, except during initialization */
w83793_write_value(struct i2c_client * client,u16 reg,u8 value)2122 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2123 {
2124 struct w83793_data *data = i2c_get_clientdata(client);
2125 int res;
2126 u8 new_bank = reg >> 8;
2127
2128 new_bank |= data->bank & 0xfc;
2129 if (data->bank != new_bank) {
2130 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2131 new_bank);
2132 if (res < 0) {
2133 dev_err(&client->dev,
2134 "set bank to %d failed, fall back "
2135 "to bank %d, write reg 0x%x error\n",
2136 new_bank, data->bank, reg);
2137 goto END;
2138 }
2139 data->bank = new_bank;
2140 }
2141
2142 res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2143 END:
2144 return res;
2145 }
2146
2147 module_i2c_driver(w83793_driver);
2148
2149 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2150 MODULE_DESCRIPTION("w83793 driver");
2151 MODULE_LICENSE("GPL");
2152
