1 /*
2 * w83793.c - Linux kernel driver for hardware monitoring
3 * Copyright (C) 2006 Winbond Electronics Corp.
4 * Yuan Mu
5 * Rudolf Marek <r.marek@assembler.cz>
6 * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
7 * Watchdog driver part
8 * (Based partially on fschmd driver,
9 * Copyright 2007-2008 by Hans de Goede)
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation - version 2.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 * 02110-1301 USA.
24 */
25
26 /*
27 * Supports following chips:
28 *
29 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
30 * w83793 10 12 8 6 0x7b 0x5ca3 yes no
31 */
32
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/i2c.h>
37 #include <linux/hwmon.h>
38 #include <linux/hwmon-vid.h>
39 #include <linux/hwmon-sysfs.h>
40 #include <linux/err.h>
41 #include <linux/mutex.h>
42 #include <linux/fs.h>
43 #include <linux/watchdog.h>
44 #include <linux/miscdevice.h>
45 #include <linux/uaccess.h>
46 #include <linux/kref.h>
47 #include <linux/notifier.h>
48 #include <linux/reboot.h>
49 #include <linux/jiffies.h>
50
51 /* Default values */
52 #define WATCHDOG_TIMEOUT 2 /* 2 minute default timeout */
53
54 /* Addresses to scan */
55 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
56 I2C_CLIENT_END };
57
58 /* Insmod parameters */
59
60 static unsigned short force_subclients[4];
61 module_param_array(force_subclients, short, NULL, 0);
62 MODULE_PARM_DESC(force_subclients,
63 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
64
65 static bool reset;
66 module_param(reset, bool, 0);
67 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
68
69 static int timeout = WATCHDOG_TIMEOUT; /* default timeout in minutes */
70 module_param(timeout, int, 0);
71 MODULE_PARM_DESC(timeout,
72 "Watchdog timeout in minutes. 2<= timeout <=255 (default="
73 __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
74
75 static bool nowayout = WATCHDOG_NOWAYOUT;
76 module_param(nowayout, bool, 0);
77 MODULE_PARM_DESC(nowayout,
78 "Watchdog cannot be stopped once started (default="
79 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
80
81 /*
82 * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
83 * as ID, Bank Select registers
84 */
85 #define W83793_REG_BANKSEL 0x00
86 #define W83793_REG_VENDORID 0x0d
87 #define W83793_REG_CHIPID 0x0e
88 #define W83793_REG_DEVICEID 0x0f
89
90 #define W83793_REG_CONFIG 0x40
91 #define W83793_REG_MFC 0x58
92 #define W83793_REG_FANIN_CTRL 0x5c
93 #define W83793_REG_FANIN_SEL 0x5d
94 #define W83793_REG_I2C_ADDR 0x0b
95 #define W83793_REG_I2C_SUBADDR 0x0c
96 #define W83793_REG_VID_INA 0x05
97 #define W83793_REG_VID_INB 0x06
98 #define W83793_REG_VID_LATCHA 0x07
99 #define W83793_REG_VID_LATCHB 0x08
100 #define W83793_REG_VID_CTRL 0x59
101
102 #define W83793_REG_WDT_LOCK 0x01
103 #define W83793_REG_WDT_ENABLE 0x02
104 #define W83793_REG_WDT_STATUS 0x03
105 #define W83793_REG_WDT_TIMEOUT 0x04
106
107 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
108
109 #define TEMP_READ 0
110 #define TEMP_CRIT 1
111 #define TEMP_CRIT_HYST 2
112 #define TEMP_WARN 3
113 #define TEMP_WARN_HYST 4
114 /*
115 * only crit and crit_hyst affect real-time alarm status
116 * current crit crit_hyst warn warn_hyst
117 */
118 static u16 W83793_REG_TEMP[][5] = {
119 {0x1c, 0x78, 0x79, 0x7a, 0x7b},
120 {0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
121 {0x1e, 0x80, 0x81, 0x82, 0x83},
122 {0x1f, 0x84, 0x85, 0x86, 0x87},
123 {0x20, 0x88, 0x89, 0x8a, 0x8b},
124 {0x21, 0x8c, 0x8d, 0x8e, 0x8f},
125 };
126
127 #define W83793_REG_TEMP_LOW_BITS 0x22
128
129 #define W83793_REG_BEEP(index) (0x53 + (index))
130 #define W83793_REG_ALARM(index) (0x4b + (index))
131
132 #define W83793_REG_CLR_CHASSIS 0x4a /* SMI MASK4 */
133 #define W83793_REG_IRQ_CTRL 0x50
134 #define W83793_REG_OVT_CTRL 0x51
135 #define W83793_REG_OVT_BEEP 0x52
136
137 #define IN_READ 0
138 #define IN_MAX 1
139 #define IN_LOW 2
140 static const u16 W83793_REG_IN[][3] = {
141 /* Current, High, Low */
142 {0x10, 0x60, 0x61}, /* Vcore A */
143 {0x11, 0x62, 0x63}, /* Vcore B */
144 {0x12, 0x64, 0x65}, /* Vtt */
145 {0x14, 0x6a, 0x6b}, /* VSEN1 */
146 {0x15, 0x6c, 0x6d}, /* VSEN2 */
147 {0x16, 0x6e, 0x6f}, /* +3VSEN */
148 {0x17, 0x70, 0x71}, /* +12VSEN */
149 {0x18, 0x72, 0x73}, /* 5VDD */
150 {0x19, 0x74, 0x75}, /* 5VSB */
151 {0x1a, 0x76, 0x77}, /* VBAT */
152 };
153
154 /* Low Bits of Vcore A/B Vtt Read/High/Low */
155 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
156 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
157 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
158
159 #define W83793_REG_FAN(index) (0x23 + 2 * (index)) /* High byte */
160 #define W83793_REG_FAN_MIN(index) (0x90 + 2 * (index)) /* High byte */
161
162 #define W83793_REG_PWM_DEFAULT 0xb2
163 #define W83793_REG_PWM_ENABLE 0x207
164 #define W83793_REG_PWM_UPTIME 0xc3 /* Unit in 0.1 second */
165 #define W83793_REG_PWM_DOWNTIME 0xc4 /* Unit in 0.1 second */
166 #define W83793_REG_TEMP_CRITICAL 0xc5
167
168 #define PWM_DUTY 0
169 #define PWM_START 1
170 #define PWM_NONSTOP 2
171 #define PWM_STOP_TIME 3
172 #define W83793_REG_PWM(index, nr) (((nr) == 0 ? 0xb3 : \
173 (nr) == 1 ? 0x220 : 0x218) + (index))
174
175 /* bit field, fan1 is bit0, fan2 is bit1 ... */
176 #define W83793_REG_TEMP_FAN_MAP(index) (0x201 + (index))
177 #define W83793_REG_TEMP_TOL(index) (0x208 + (index))
178 #define W83793_REG_TEMP_CRUISE(index) (0x210 + (index))
179 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
180 #define W83793_REG_SF2_TEMP(index, nr) (0x230 + ((index) << 4) + (nr))
181 #define W83793_REG_SF2_PWM(index, nr) (0x238 + ((index) << 4) + (nr))
182
FAN_FROM_REG(u16 val)183 static inline unsigned long FAN_FROM_REG(u16 val)
184 {
185 if ((val >= 0xfff) || (val == 0))
186 return 0;
187 return 1350000UL / val;
188 }
189
FAN_TO_REG(long rpm)190 static inline u16 FAN_TO_REG(long rpm)
191 {
192 if (rpm <= 0)
193 return 0x0fff;
194 return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
195 }
196
TIME_FROM_REG(u8 reg)197 static inline unsigned long TIME_FROM_REG(u8 reg)
198 {
199 return reg * 100;
200 }
201
TIME_TO_REG(unsigned long val)202 static inline u8 TIME_TO_REG(unsigned long val)
203 {
204 return clamp_val((val + 50) / 100, 0, 0xff);
205 }
206
TEMP_FROM_REG(s8 reg)207 static inline long TEMP_FROM_REG(s8 reg)
208 {
209 return reg * 1000;
210 }
211
TEMP_TO_REG(long val,s8 min,s8 max)212 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
213 {
214 return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max);
215 }
216
217 struct w83793_data {
218 struct i2c_client *lm75[2];
219 struct device *hwmon_dev;
220 struct mutex update_lock;
221 char valid; /* !=0 if following fields are valid */
222 unsigned long last_updated; /* In jiffies */
223 unsigned long last_nonvolatile; /* In jiffies, last time we update the
224 * nonvolatile registers
225 */
226
227 u8 bank;
228 u8 vrm;
229 u8 vid[2];
230 u8 in[10][3]; /* Register value, read/high/low */
231 u8 in_low_bits[3]; /* Additional resolution for VCore A/B Vtt */
232
233 u16 has_fan; /* Only fan1- fan5 has own pins */
234 u16 fan[12]; /* Register value combine */
235 u16 fan_min[12]; /* Register value combine */
236
237 s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */
238 u8 temp_low_bits; /* Additional resolution TD1-TD4 */
239 u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits
240 * byte 1: Temp R1,R2 mode, each has 1 bit
241 */
242 u8 temp_critical; /* If reached all fan will be at full speed */
243 u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */
244
245 u8 has_pwm;
246 u8 has_temp;
247 u8 has_vid;
248 u8 pwm_enable; /* Register value, each Temp has 1 bit */
249 u8 pwm_uptime; /* Register value */
250 u8 pwm_downtime; /* Register value */
251 u8 pwm_default; /* All fan default pwm, next poweron valid */
252 u8 pwm[8][3]; /* Register value */
253 u8 pwm_stop_time[8];
254 u8 temp_cruise[6];
255
256 u8 alarms[5]; /* realtime status registers */
257 u8 beeps[5];
258 u8 beep_enable;
259 u8 tolerance[3]; /* Temp tolerance(Smart Fan I/II) */
260 u8 sf2_pwm[6][7]; /* Smart FanII: Fan duty cycle */
261 u8 sf2_temp[6][7]; /* Smart FanII: Temp level point */
262
263 /* watchdog */
264 struct i2c_client *client;
265 struct mutex watchdog_lock;
266 struct list_head list; /* member of the watchdog_data_list */
267 struct kref kref;
268 struct miscdevice watchdog_miscdev;
269 unsigned long watchdog_is_open;
270 char watchdog_expect_close;
271 char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
272 unsigned int watchdog_caused_reboot;
273 int watchdog_timeout; /* watchdog timeout in minutes */
274 };
275
276 /*
277 * Somewhat ugly :( global data pointer list with all devices, so that
278 * we can find our device data as when using misc_register. There is no
279 * other method to get to one's device data from the open file-op and
280 * for usage in the reboot notifier callback.
281 */
282 static LIST_HEAD(watchdog_data_list);
283
284 /* Note this lock not only protect list access, but also data.kref access */
285 static DEFINE_MUTEX(watchdog_data_mutex);
286
287 /*
288 * Release our data struct when we're detached from the i2c client *and* all
289 * references to our watchdog device are released
290 */
w83793_release_resources(struct kref * ref)291 static void w83793_release_resources(struct kref *ref)
292 {
293 struct w83793_data *data = container_of(ref, struct w83793_data, kref);
294 kfree(data);
295 }
296
297 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
298 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
299 static int w83793_probe(struct i2c_client *client,
300 const struct i2c_device_id *id);
301 static int w83793_detect(struct i2c_client *client,
302 struct i2c_board_info *info);
303 static int w83793_remove(struct i2c_client *client);
304 static void w83793_init_client(struct i2c_client *client);
305 static void w83793_update_nonvolatile(struct device *dev);
306 static struct w83793_data *w83793_update_device(struct device *dev);
307
308 static const struct i2c_device_id w83793_id[] = {
309 { "w83793", 0 },
310 { }
311 };
312 MODULE_DEVICE_TABLE(i2c, w83793_id);
313
314 static struct i2c_driver w83793_driver = {
315 .class = I2C_CLASS_HWMON,
316 .driver = {
317 .name = "w83793",
318 },
319 .probe = w83793_probe,
320 .remove = w83793_remove,
321 .id_table = w83793_id,
322 .detect = w83793_detect,
323 .address_list = normal_i2c,
324 };
325
326 static ssize_t
vrm_show(struct device * dev,struct device_attribute * attr,char * buf)327 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
328 {
329 struct w83793_data *data = dev_get_drvdata(dev);
330 return sprintf(buf, "%d\n", data->vrm);
331 }
332
333 static ssize_t
show_vid(struct device * dev,struct device_attribute * attr,char * buf)334 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
335 {
336 struct w83793_data *data = w83793_update_device(dev);
337 struct sensor_device_attribute_2 *sensor_attr =
338 to_sensor_dev_attr_2(attr);
339 int index = sensor_attr->index;
340
341 return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
342 }
343
344 static ssize_t
vrm_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)345 vrm_store(struct device *dev, struct device_attribute *attr,
346 const char *buf, size_t count)
347 {
348 struct w83793_data *data = dev_get_drvdata(dev);
349 unsigned long val;
350 int err;
351
352 err = kstrtoul(buf, 10, &val);
353 if (err)
354 return err;
355
356 if (val > 255)
357 return -EINVAL;
358
359 data->vrm = val;
360 return count;
361 }
362
363 #define ALARM_STATUS 0
364 #define BEEP_ENABLE 1
365 static ssize_t
show_alarm_beep(struct device * dev,struct device_attribute * attr,char * buf)366 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
367 {
368 struct w83793_data *data = w83793_update_device(dev);
369 struct sensor_device_attribute_2 *sensor_attr =
370 to_sensor_dev_attr_2(attr);
371 int nr = sensor_attr->nr;
372 int index = sensor_attr->index >> 3;
373 int bit = sensor_attr->index & 0x07;
374 u8 val;
375
376 if (nr == ALARM_STATUS) {
377 val = (data->alarms[index] >> (bit)) & 1;
378 } else { /* BEEP_ENABLE */
379 val = (data->beeps[index] >> (bit)) & 1;
380 }
381
382 return sprintf(buf, "%u\n", val);
383 }
384
385 static ssize_t
store_beep(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)386 store_beep(struct device *dev, struct device_attribute *attr,
387 const char *buf, size_t count)
388 {
389 struct i2c_client *client = to_i2c_client(dev);
390 struct w83793_data *data = i2c_get_clientdata(client);
391 struct sensor_device_attribute_2 *sensor_attr =
392 to_sensor_dev_attr_2(attr);
393 int index = sensor_attr->index >> 3;
394 int shift = sensor_attr->index & 0x07;
395 u8 beep_bit = 1 << shift;
396 unsigned long val;
397 int err;
398
399 err = kstrtoul(buf, 10, &val);
400 if (err)
401 return err;
402
403 if (val > 1)
404 return -EINVAL;
405
406 mutex_lock(&data->update_lock);
407 data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
408 data->beeps[index] &= ~beep_bit;
409 data->beeps[index] |= val << shift;
410 w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
411 mutex_unlock(&data->update_lock);
412
413 return count;
414 }
415
416 static ssize_t
show_beep_enable(struct device * dev,struct device_attribute * attr,char * buf)417 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
418 {
419 struct w83793_data *data = w83793_update_device(dev);
420 return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
421 }
422
423 static ssize_t
store_beep_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)424 store_beep_enable(struct device *dev, struct device_attribute *attr,
425 const char *buf, size_t count)
426 {
427 struct i2c_client *client = to_i2c_client(dev);
428 struct w83793_data *data = i2c_get_clientdata(client);
429 unsigned long val;
430 int err;
431
432 err = kstrtoul(buf, 10, &val);
433 if (err)
434 return err;
435
436 if (val > 1)
437 return -EINVAL;
438
439 mutex_lock(&data->update_lock);
440 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
441 & 0xfd;
442 data->beep_enable |= val << 1;
443 w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
444 mutex_unlock(&data->update_lock);
445
446 return count;
447 }
448
449 /* Write 0 to clear chassis alarm */
450 static ssize_t
store_chassis_clear(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)451 store_chassis_clear(struct device *dev,
452 struct device_attribute *attr, const char *buf,
453 size_t count)
454 {
455 struct i2c_client *client = to_i2c_client(dev);
456 struct w83793_data *data = i2c_get_clientdata(client);
457 unsigned long val;
458 u8 reg;
459 int err;
460
461 err = kstrtoul(buf, 10, &val);
462 if (err)
463 return err;
464 if (val)
465 return -EINVAL;
466
467 mutex_lock(&data->update_lock);
468 reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
469 w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
470 data->valid = 0; /* Force cache refresh */
471 mutex_unlock(&data->update_lock);
472 return count;
473 }
474
475 #define FAN_INPUT 0
476 #define FAN_MIN 1
477 static ssize_t
show_fan(struct device * dev,struct device_attribute * attr,char * buf)478 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
479 {
480 struct sensor_device_attribute_2 *sensor_attr =
481 to_sensor_dev_attr_2(attr);
482 int nr = sensor_attr->nr;
483 int index = sensor_attr->index;
484 struct w83793_data *data = w83793_update_device(dev);
485 u16 val;
486
487 if (nr == FAN_INPUT)
488 val = data->fan[index] & 0x0fff;
489 else
490 val = data->fan_min[index] & 0x0fff;
491
492 return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
493 }
494
495 static ssize_t
store_fan_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)496 store_fan_min(struct device *dev, struct device_attribute *attr,
497 const char *buf, size_t count)
498 {
499 struct sensor_device_attribute_2 *sensor_attr =
500 to_sensor_dev_attr_2(attr);
501 int index = sensor_attr->index;
502 struct i2c_client *client = to_i2c_client(dev);
503 struct w83793_data *data = i2c_get_clientdata(client);
504 unsigned long val;
505 int err;
506
507 err = kstrtoul(buf, 10, &val);
508 if (err)
509 return err;
510 val = FAN_TO_REG(val);
511
512 mutex_lock(&data->update_lock);
513 data->fan_min[index] = val;
514 w83793_write_value(client, W83793_REG_FAN_MIN(index),
515 (val >> 8) & 0xff);
516 w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
517 mutex_unlock(&data->update_lock);
518
519 return count;
520 }
521
522 static ssize_t
show_pwm(struct device * dev,struct device_attribute * attr,char * buf)523 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
524 {
525 struct sensor_device_attribute_2 *sensor_attr =
526 to_sensor_dev_attr_2(attr);
527 struct w83793_data *data = w83793_update_device(dev);
528 u16 val;
529 int nr = sensor_attr->nr;
530 int index = sensor_attr->index;
531
532 if (nr == PWM_STOP_TIME)
533 val = TIME_FROM_REG(data->pwm_stop_time[index]);
534 else
535 val = (data->pwm[index][nr] & 0x3f) << 2;
536
537 return sprintf(buf, "%d\n", val);
538 }
539
540 static ssize_t
store_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)541 store_pwm(struct device *dev, struct device_attribute *attr,
542 const char *buf, size_t count)
543 {
544 struct i2c_client *client = to_i2c_client(dev);
545 struct w83793_data *data = i2c_get_clientdata(client);
546 struct sensor_device_attribute_2 *sensor_attr =
547 to_sensor_dev_attr_2(attr);
548 int nr = sensor_attr->nr;
549 int index = sensor_attr->index;
550 unsigned long val;
551 int err;
552
553 err = kstrtoul(buf, 10, &val);
554 if (err)
555 return err;
556
557 mutex_lock(&data->update_lock);
558 if (nr == PWM_STOP_TIME) {
559 val = TIME_TO_REG(val);
560 data->pwm_stop_time[index] = val;
561 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
562 val);
563 } else {
564 val = clamp_val(val, 0, 0xff) >> 2;
565 data->pwm[index][nr] =
566 w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
567 data->pwm[index][nr] |= val;
568 w83793_write_value(client, W83793_REG_PWM(index, nr),
569 data->pwm[index][nr]);
570 }
571
572 mutex_unlock(&data->update_lock);
573 return count;
574 }
575
576 static ssize_t
show_temp(struct device * dev,struct device_attribute * attr,char * buf)577 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
578 {
579 struct sensor_device_attribute_2 *sensor_attr =
580 to_sensor_dev_attr_2(attr);
581 int nr = sensor_attr->nr;
582 int index = sensor_attr->index;
583 struct w83793_data *data = w83793_update_device(dev);
584 long temp = TEMP_FROM_REG(data->temp[index][nr]);
585
586 if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */
587 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
588 temp += temp > 0 ? low : -low;
589 }
590 return sprintf(buf, "%ld\n", temp);
591 }
592
593 static ssize_t
store_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)594 store_temp(struct device *dev, struct device_attribute *attr,
595 const char *buf, size_t count)
596 {
597 struct sensor_device_attribute_2 *sensor_attr =
598 to_sensor_dev_attr_2(attr);
599 int nr = sensor_attr->nr;
600 int index = sensor_attr->index;
601 struct i2c_client *client = to_i2c_client(dev);
602 struct w83793_data *data = i2c_get_clientdata(client);
603 long tmp;
604 int err;
605
606 err = kstrtol(buf, 10, &tmp);
607 if (err)
608 return err;
609
610 mutex_lock(&data->update_lock);
611 data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
612 w83793_write_value(client, W83793_REG_TEMP[index][nr],
613 data->temp[index][nr]);
614 mutex_unlock(&data->update_lock);
615 return count;
616 }
617
618 /*
619 * TD1-TD4
620 * each has 4 mode:(2 bits)
621 * 0: Stop monitor
622 * 1: Use internal temp sensor(default)
623 * 2: Reserved
624 * 3: Use sensor in Intel CPU and get result by PECI
625 *
626 * TR1-TR2
627 * each has 2 mode:(1 bit)
628 * 0: Disable temp sensor monitor
629 * 1: To enable temp sensors monitor
630 */
631
632 /* 0 disable, 6 PECI */
633 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
634
635 static ssize_t
show_temp_mode(struct device * dev,struct device_attribute * attr,char * buf)636 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
637 {
638 struct w83793_data *data = w83793_update_device(dev);
639 struct sensor_device_attribute_2 *sensor_attr =
640 to_sensor_dev_attr_2(attr);
641 int index = sensor_attr->index;
642 u8 mask = (index < 4) ? 0x03 : 0x01;
643 u8 shift = (index < 4) ? (2 * index) : (index - 4);
644 u8 tmp;
645 index = (index < 4) ? 0 : 1;
646
647 tmp = (data->temp_mode[index] >> shift) & mask;
648
649 /* for the internal sensor, found out if diode or thermistor */
650 if (tmp == 1)
651 tmp = index == 0 ? 3 : 4;
652 else
653 tmp = TO_TEMP_MODE[tmp];
654
655 return sprintf(buf, "%d\n", tmp);
656 }
657
658 static ssize_t
store_temp_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)659 store_temp_mode(struct device *dev, struct device_attribute *attr,
660 const char *buf, size_t count)
661 {
662 struct i2c_client *client = to_i2c_client(dev);
663 struct w83793_data *data = i2c_get_clientdata(client);
664 struct sensor_device_attribute_2 *sensor_attr =
665 to_sensor_dev_attr_2(attr);
666 int index = sensor_attr->index;
667 u8 mask = (index < 4) ? 0x03 : 0x01;
668 u8 shift = (index < 4) ? (2 * index) : (index - 4);
669 unsigned long val;
670 int err;
671
672 err = kstrtoul(buf, 10, &val);
673 if (err)
674 return err;
675
676 /* transform the sysfs interface values into table above */
677 if ((val == 6) && (index < 4)) {
678 val -= 3;
679 } else if ((val == 3 && index < 4)
680 || (val == 4 && index >= 4)) {
681 /* transform diode or thermistor into internal enable */
682 val = !!val;
683 } else {
684 return -EINVAL;
685 }
686
687 index = (index < 4) ? 0 : 1;
688 mutex_lock(&data->update_lock);
689 data->temp_mode[index] =
690 w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
691 data->temp_mode[index] &= ~(mask << shift);
692 data->temp_mode[index] |= val << shift;
693 w83793_write_value(client, W83793_REG_TEMP_MODE[index],
694 data->temp_mode[index]);
695 mutex_unlock(&data->update_lock);
696
697 return count;
698 }
699
700 #define SETUP_PWM_DEFAULT 0
701 #define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */
702 #define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */
703 #define SETUP_TEMP_CRITICAL 3
704 static ssize_t
show_sf_setup(struct device * dev,struct device_attribute * attr,char * buf)705 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
706 {
707 struct sensor_device_attribute_2 *sensor_attr =
708 to_sensor_dev_attr_2(attr);
709 int nr = sensor_attr->nr;
710 struct w83793_data *data = w83793_update_device(dev);
711 u32 val = 0;
712
713 if (nr == SETUP_PWM_DEFAULT)
714 val = (data->pwm_default & 0x3f) << 2;
715 else if (nr == SETUP_PWM_UPTIME)
716 val = TIME_FROM_REG(data->pwm_uptime);
717 else if (nr == SETUP_PWM_DOWNTIME)
718 val = TIME_FROM_REG(data->pwm_downtime);
719 else if (nr == SETUP_TEMP_CRITICAL)
720 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
721
722 return sprintf(buf, "%d\n", val);
723 }
724
725 static ssize_t
store_sf_setup(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)726 store_sf_setup(struct device *dev, struct device_attribute *attr,
727 const char *buf, size_t count)
728 {
729 struct sensor_device_attribute_2 *sensor_attr =
730 to_sensor_dev_attr_2(attr);
731 int nr = sensor_attr->nr;
732 struct i2c_client *client = to_i2c_client(dev);
733 struct w83793_data *data = i2c_get_clientdata(client);
734 long val;
735 int err;
736
737 err = kstrtol(buf, 10, &val);
738 if (err)
739 return err;
740
741 mutex_lock(&data->update_lock);
742 if (nr == SETUP_PWM_DEFAULT) {
743 data->pwm_default =
744 w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
745 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
746 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
747 data->pwm_default);
748 } else if (nr == SETUP_PWM_UPTIME) {
749 data->pwm_uptime = TIME_TO_REG(val);
750 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
751 w83793_write_value(client, W83793_REG_PWM_UPTIME,
752 data->pwm_uptime);
753 } else if (nr == SETUP_PWM_DOWNTIME) {
754 data->pwm_downtime = TIME_TO_REG(val);
755 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
756 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
757 data->pwm_downtime);
758 } else { /* SETUP_TEMP_CRITICAL */
759 data->temp_critical =
760 w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
761 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
762 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
763 data->temp_critical);
764 }
765
766 mutex_unlock(&data->update_lock);
767 return count;
768 }
769
770 /*
771 * Temp SmartFan control
772 * TEMP_FAN_MAP
773 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
774 * It's possible two or more temp channels control the same fan, w83793
775 * always prefers to pick the most critical request and applies it to
776 * the related Fan.
777 * It's possible one fan is not in any mapping of 6 temp channels, this
778 * means the fan is manual mode
779 *
780 * TEMP_PWM_ENABLE
781 * Each temp channel has its own SmartFan mode, and temp channel
782 * control fans that are set by TEMP_FAN_MAP
783 * 0: SmartFanII mode
784 * 1: Thermal Cruise Mode
785 *
786 * TEMP_CRUISE
787 * Target temperature in thermal cruise mode, w83793 will try to turn
788 * fan speed to keep the temperature of target device around this
789 * temperature.
790 *
791 * TEMP_TOLERANCE
792 * If Temp higher or lower than target with this tolerance, w83793
793 * will take actions to speed up or slow down the fan to keep the
794 * temperature within the tolerance range.
795 */
796
797 #define TEMP_FAN_MAP 0
798 #define TEMP_PWM_ENABLE 1
799 #define TEMP_CRUISE 2
800 #define TEMP_TOLERANCE 3
801 static ssize_t
show_sf_ctrl(struct device * dev,struct device_attribute * attr,char * buf)802 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
803 {
804 struct sensor_device_attribute_2 *sensor_attr =
805 to_sensor_dev_attr_2(attr);
806 int nr = sensor_attr->nr;
807 int index = sensor_attr->index;
808 struct w83793_data *data = w83793_update_device(dev);
809 u32 val;
810
811 if (nr == TEMP_FAN_MAP) {
812 val = data->temp_fan_map[index];
813 } else if (nr == TEMP_PWM_ENABLE) {
814 /* +2 to transform into 2 and 3 to conform with sysfs intf */
815 val = ((data->pwm_enable >> index) & 0x01) + 2;
816 } else if (nr == TEMP_CRUISE) {
817 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
818 } else { /* TEMP_TOLERANCE */
819 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
820 val = TEMP_FROM_REG(val & 0x0f);
821 }
822 return sprintf(buf, "%d\n", val);
823 }
824
825 static ssize_t
store_sf_ctrl(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)826 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
827 const char *buf, size_t count)
828 {
829 struct sensor_device_attribute_2 *sensor_attr =
830 to_sensor_dev_attr_2(attr);
831 int nr = sensor_attr->nr;
832 int index = sensor_attr->index;
833 struct i2c_client *client = to_i2c_client(dev);
834 struct w83793_data *data = i2c_get_clientdata(client);
835 long val;
836 int err;
837
838 err = kstrtol(buf, 10, &val);
839 if (err)
840 return err;
841
842 mutex_lock(&data->update_lock);
843 if (nr == TEMP_FAN_MAP) {
844 val = clamp_val(val, 0, 255);
845 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
846 data->temp_fan_map[index] = val;
847 } else if (nr == TEMP_PWM_ENABLE) {
848 if (val == 2 || val == 3) {
849 data->pwm_enable =
850 w83793_read_value(client, W83793_REG_PWM_ENABLE);
851 if (val - 2)
852 data->pwm_enable |= 1 << index;
853 else
854 data->pwm_enable &= ~(1 << index);
855 w83793_write_value(client, W83793_REG_PWM_ENABLE,
856 data->pwm_enable);
857 } else {
858 mutex_unlock(&data->update_lock);
859 return -EINVAL;
860 }
861 } else if (nr == TEMP_CRUISE) {
862 data->temp_cruise[index] =
863 w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
864 data->temp_cruise[index] &= 0x80;
865 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
866
867 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
868 data->temp_cruise[index]);
869 } else { /* TEMP_TOLERANCE */
870 int i = index >> 1;
871 u8 shift = (index & 0x01) ? 4 : 0;
872 data->tolerance[i] =
873 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
874
875 data->tolerance[i] &= ~(0x0f << shift);
876 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
877 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
878 data->tolerance[i]);
879 }
880
881 mutex_unlock(&data->update_lock);
882 return count;
883 }
884
885 static ssize_t
show_sf2_pwm(struct device * dev,struct device_attribute * attr,char * buf)886 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
887 {
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 struct w83793_data *data = w83793_update_device(dev);
893
894 return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
895 }
896
897 static ssize_t
store_sf2_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)898 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
899 const char *buf, size_t count)
900 {
901 struct i2c_client *client = to_i2c_client(dev);
902 struct w83793_data *data = i2c_get_clientdata(client);
903 struct sensor_device_attribute_2 *sensor_attr =
904 to_sensor_dev_attr_2(attr);
905 int nr = sensor_attr->nr;
906 int index = sensor_attr->index;
907 unsigned long val;
908 int err;
909
910 err = kstrtoul(buf, 10, &val);
911 if (err)
912 return err;
913 val = clamp_val(val, 0, 0xff) >> 2;
914
915 mutex_lock(&data->update_lock);
916 data->sf2_pwm[index][nr] =
917 w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
918 data->sf2_pwm[index][nr] |= val;
919 w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
920 data->sf2_pwm[index][nr]);
921 mutex_unlock(&data->update_lock);
922 return count;
923 }
924
925 static ssize_t
show_sf2_temp(struct device * dev,struct device_attribute * attr,char * buf)926 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
927 {
928 struct sensor_device_attribute_2 *sensor_attr =
929 to_sensor_dev_attr_2(attr);
930 int nr = sensor_attr->nr;
931 int index = sensor_attr->index;
932 struct w83793_data *data = w83793_update_device(dev);
933
934 return sprintf(buf, "%ld\n",
935 TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
936 }
937
938 static ssize_t
store_sf2_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)939 store_sf2_temp(struct device *dev, struct device_attribute *attr,
940 const char *buf, size_t count)
941 {
942 struct i2c_client *client = to_i2c_client(dev);
943 struct w83793_data *data = i2c_get_clientdata(client);
944 struct sensor_device_attribute_2 *sensor_attr =
945 to_sensor_dev_attr_2(attr);
946 int nr = sensor_attr->nr;
947 int index = sensor_attr->index;
948 long val;
949 int err;
950
951 err = kstrtol(buf, 10, &val);
952 if (err)
953 return err;
954 val = TEMP_TO_REG(val, 0, 0x7f);
955
956 mutex_lock(&data->update_lock);
957 data->sf2_temp[index][nr] =
958 w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
959 data->sf2_temp[index][nr] |= val;
960 w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
961 data->sf2_temp[index][nr]);
962 mutex_unlock(&data->update_lock);
963 return count;
964 }
965
966 /* only Vcore A/B and Vtt have additional 2 bits precision */
967 static ssize_t
show_in(struct device * dev,struct device_attribute * attr,char * buf)968 show_in(struct device *dev, struct device_attribute *attr, char *buf)
969 {
970 struct sensor_device_attribute_2 *sensor_attr =
971 to_sensor_dev_attr_2(attr);
972 int nr = sensor_attr->nr;
973 int index = sensor_attr->index;
974 struct w83793_data *data = w83793_update_device(dev);
975 u16 val = data->in[index][nr];
976
977 if (index < 3) {
978 val <<= 2;
979 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
980 }
981 /* voltage inputs 5VDD and 5VSB needs 150mV offset */
982 val = val * scale_in[index] + scale_in_add[index];
983 return sprintf(buf, "%d\n", val);
984 }
985
986 static ssize_t
store_in(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)987 store_in(struct device *dev, struct device_attribute *attr,
988 const char *buf, size_t count)
989 {
990 struct sensor_device_attribute_2 *sensor_attr =
991 to_sensor_dev_attr_2(attr);
992 int nr = sensor_attr->nr;
993 int index = sensor_attr->index;
994 struct i2c_client *client = to_i2c_client(dev);
995 struct w83793_data *data = i2c_get_clientdata(client);
996 unsigned long val;
997 int err;
998
999 err = kstrtoul(buf, 10, &val);
1000 if (err)
1001 return err;
1002 val = (val + scale_in[index] / 2) / scale_in[index];
1003
1004 mutex_lock(&data->update_lock);
1005 if (index > 2) {
1006 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
1007 if (nr == 1 || nr == 2)
1008 val -= scale_in_add[index] / scale_in[index];
1009 val = clamp_val(val, 0, 255);
1010 } else {
1011 val = clamp_val(val, 0, 0x3FF);
1012 data->in_low_bits[nr] =
1013 w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1014 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1015 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1016 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1017 data->in_low_bits[nr]);
1018 val >>= 2;
1019 }
1020 data->in[index][nr] = val;
1021 w83793_write_value(client, W83793_REG_IN[index][nr],
1022 data->in[index][nr]);
1023 mutex_unlock(&data->update_lock);
1024 return count;
1025 }
1026
1027 #define NOT_USED -1
1028
1029 #define SENSOR_ATTR_IN(index) \
1030 SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \
1031 IN_READ, index), \
1032 SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \
1033 store_in, IN_MAX, index), \
1034 SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \
1035 store_in, IN_LOW, index), \
1036 SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \
1037 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \
1038 SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \
1039 show_alarm_beep, store_beep, BEEP_ENABLE, \
1040 index + ((index > 2) ? 1 : 0))
1041
1042 #define SENSOR_ATTR_FAN(index) \
1043 SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \
1044 NULL, ALARM_STATUS, index + 17), \
1045 SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \
1046 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \
1047 SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \
1048 NULL, FAN_INPUT, index - 1), \
1049 SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \
1050 show_fan, store_fan_min, FAN_MIN, index - 1)
1051
1052 #define SENSOR_ATTR_PWM(index) \
1053 SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \
1054 store_pwm, PWM_DUTY, index - 1), \
1055 SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \
1056 show_pwm, store_pwm, PWM_NONSTOP, index - 1), \
1057 SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \
1058 show_pwm, store_pwm, PWM_START, index - 1), \
1059 SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \
1060 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1061
1062 #define SENSOR_ATTR_TEMP(index) \
1063 SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \
1064 show_temp_mode, store_temp_mode, NOT_USED, index - 1), \
1065 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \
1066 NULL, TEMP_READ, index - 1), \
1067 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \
1068 store_temp, TEMP_CRIT, index - 1), \
1069 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
1070 show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \
1071 SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1072 store_temp, TEMP_WARN, index - 1), \
1073 SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \
1074 show_temp, store_temp, TEMP_WARN_HYST, index - 1), \
1075 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
1076 show_alarm_beep, NULL, ALARM_STATUS, index + 11), \
1077 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
1078 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \
1079 SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \
1080 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \
1081 TEMP_FAN_MAP, index - 1), \
1082 SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
1083 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \
1084 index - 1), \
1085 SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \
1086 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \
1087 SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1088 store_sf_ctrl, TEMP_TOLERANCE, index - 1), \
1089 SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1090 show_sf2_pwm, store_sf2_pwm, 0, index - 1), \
1091 SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1092 show_sf2_pwm, store_sf2_pwm, 1, index - 1), \
1093 SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1094 show_sf2_pwm, store_sf2_pwm, 2, index - 1), \
1095 SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1096 show_sf2_pwm, store_sf2_pwm, 3, index - 1), \
1097 SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1098 show_sf2_pwm, store_sf2_pwm, 4, index - 1), \
1099 SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1100 show_sf2_pwm, store_sf2_pwm, 5, index - 1), \
1101 SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1102 show_sf2_pwm, store_sf2_pwm, 6, index - 1), \
1103 SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1104 show_sf2_temp, store_sf2_temp, 0, index - 1), \
1105 SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1106 show_sf2_temp, store_sf2_temp, 1, index - 1), \
1107 SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1108 show_sf2_temp, store_sf2_temp, 2, index - 1), \
1109 SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1110 show_sf2_temp, store_sf2_temp, 3, index - 1), \
1111 SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1112 show_sf2_temp, store_sf2_temp, 4, index - 1), \
1113 SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1114 show_sf2_temp, store_sf2_temp, 5, index - 1), \
1115 SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1116 show_sf2_temp, store_sf2_temp, 6, index - 1)
1117
1118 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1119 SENSOR_ATTR_IN(0),
1120 SENSOR_ATTR_IN(1),
1121 SENSOR_ATTR_IN(2),
1122 SENSOR_ATTR_IN(3),
1123 SENSOR_ATTR_IN(4),
1124 SENSOR_ATTR_IN(5),
1125 SENSOR_ATTR_IN(6),
1126 SENSOR_ATTR_IN(7),
1127 SENSOR_ATTR_IN(8),
1128 SENSOR_ATTR_IN(9),
1129 SENSOR_ATTR_FAN(1),
1130 SENSOR_ATTR_FAN(2),
1131 SENSOR_ATTR_FAN(3),
1132 SENSOR_ATTR_FAN(4),
1133 SENSOR_ATTR_FAN(5),
1134 SENSOR_ATTR_PWM(1),
1135 SENSOR_ATTR_PWM(2),
1136 SENSOR_ATTR_PWM(3),
1137 };
1138
1139 static struct sensor_device_attribute_2 w83793_temp[] = {
1140 SENSOR_ATTR_TEMP(1),
1141 SENSOR_ATTR_TEMP(2),
1142 SENSOR_ATTR_TEMP(3),
1143 SENSOR_ATTR_TEMP(4),
1144 SENSOR_ATTR_TEMP(5),
1145 SENSOR_ATTR_TEMP(6),
1146 };
1147
1148 /* Fan6-Fan12 */
1149 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1150 SENSOR_ATTR_FAN(6),
1151 SENSOR_ATTR_FAN(7),
1152 SENSOR_ATTR_FAN(8),
1153 SENSOR_ATTR_FAN(9),
1154 SENSOR_ATTR_FAN(10),
1155 SENSOR_ATTR_FAN(11),
1156 SENSOR_ATTR_FAN(12),
1157 };
1158
1159 /* Pwm4-Pwm8 */
1160 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1161 SENSOR_ATTR_PWM(4),
1162 SENSOR_ATTR_PWM(5),
1163 SENSOR_ATTR_PWM(6),
1164 SENSOR_ATTR_PWM(7),
1165 SENSOR_ATTR_PWM(8),
1166 };
1167
1168 static struct sensor_device_attribute_2 w83793_vid[] = {
1169 SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1170 SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1171 };
1172 static DEVICE_ATTR_RW(vrm);
1173
1174 static struct sensor_device_attribute_2 sda_single_files[] = {
1175 SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1176 store_chassis_clear, ALARM_STATUS, 30),
1177 SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1178 store_beep_enable, NOT_USED, NOT_USED),
1179 SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1180 store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1181 SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1182 store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1183 SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1184 store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1185 SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1186 store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1187 };
1188
w83793_init_client(struct i2c_client * client)1189 static void w83793_init_client(struct i2c_client *client)
1190 {
1191 if (reset)
1192 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1193
1194 /* Start monitoring */
1195 w83793_write_value(client, W83793_REG_CONFIG,
1196 w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1197 }
1198
1199 /*
1200 * Watchdog routines
1201 */
1202
watchdog_set_timeout(struct w83793_data * data,int timeout)1203 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1204 {
1205 unsigned int mtimeout;
1206 int ret;
1207
1208 mtimeout = DIV_ROUND_UP(timeout, 60);
1209
1210 if (mtimeout > 255)
1211 return -EINVAL;
1212
1213 mutex_lock(&data->watchdog_lock);
1214 if (!data->client) {
1215 ret = -ENODEV;
1216 goto leave;
1217 }
1218
1219 data->watchdog_timeout = mtimeout;
1220
1221 /* Set Timeout value (in Minutes) */
1222 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1223 data->watchdog_timeout);
1224
1225 ret = mtimeout * 60;
1226
1227 leave:
1228 mutex_unlock(&data->watchdog_lock);
1229 return ret;
1230 }
1231
watchdog_get_timeout(struct w83793_data * data)1232 static int watchdog_get_timeout(struct w83793_data *data)
1233 {
1234 int timeout;
1235
1236 mutex_lock(&data->watchdog_lock);
1237 timeout = data->watchdog_timeout * 60;
1238 mutex_unlock(&data->watchdog_lock);
1239
1240 return timeout;
1241 }
1242
watchdog_trigger(struct w83793_data * data)1243 static int watchdog_trigger(struct w83793_data *data)
1244 {
1245 int ret = 0;
1246
1247 mutex_lock(&data->watchdog_lock);
1248 if (!data->client) {
1249 ret = -ENODEV;
1250 goto leave;
1251 }
1252
1253 /* Set Timeout value (in Minutes) */
1254 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1255 data->watchdog_timeout);
1256
1257 leave:
1258 mutex_unlock(&data->watchdog_lock);
1259 return ret;
1260 }
1261
watchdog_enable(struct w83793_data * data)1262 static int watchdog_enable(struct w83793_data *data)
1263 {
1264 int ret = 0;
1265
1266 mutex_lock(&data->watchdog_lock);
1267 if (!data->client) {
1268 ret = -ENODEV;
1269 goto leave;
1270 }
1271
1272 /* Set initial timeout */
1273 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1274 data->watchdog_timeout);
1275
1276 /* Enable Soft Watchdog */
1277 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1278
1279 leave:
1280 mutex_unlock(&data->watchdog_lock);
1281 return ret;
1282 }
1283
watchdog_disable(struct w83793_data * data)1284 static int watchdog_disable(struct w83793_data *data)
1285 {
1286 int ret = 0;
1287
1288 mutex_lock(&data->watchdog_lock);
1289 if (!data->client) {
1290 ret = -ENODEV;
1291 goto leave;
1292 }
1293
1294 /* Disable Soft Watchdog */
1295 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1296
1297 leave:
1298 mutex_unlock(&data->watchdog_lock);
1299 return ret;
1300 }
1301
watchdog_open(struct inode * inode,struct file * filp)1302 static int watchdog_open(struct inode *inode, struct file *filp)
1303 {
1304 struct w83793_data *pos, *data = NULL;
1305 int watchdog_is_open;
1306
1307 /*
1308 * We get called from drivers/char/misc.c with misc_mtx hold, and we
1309 * call misc_register() from w83793_probe() with watchdog_data_mutex
1310 * hold, as misc_register() takes the misc_mtx lock, this is a possible
1311 * deadlock, so we use mutex_trylock here.
1312 */
1313 if (!mutex_trylock(&watchdog_data_mutex))
1314 return -ERESTARTSYS;
1315 list_for_each_entry(pos, &watchdog_data_list, list) {
1316 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1317 data = pos;
1318 break;
1319 }
1320 }
1321
1322 /* Check, if device is already open */
1323 watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1324
1325 /*
1326 * Increase data reference counter (if not already done).
1327 * Note we can never not have found data, so we don't check for this
1328 */
1329 if (!watchdog_is_open)
1330 kref_get(&data->kref);
1331
1332 mutex_unlock(&watchdog_data_mutex);
1333
1334 /* Check, if device is already open and possibly issue error */
1335 if (watchdog_is_open)
1336 return -EBUSY;
1337
1338 /* Enable Soft Watchdog */
1339 watchdog_enable(data);
1340
1341 /* Store pointer to data into filp's private data */
1342 filp->private_data = data;
1343
1344 return nonseekable_open(inode, filp);
1345 }
1346
watchdog_close(struct inode * inode,struct file * filp)1347 static int watchdog_close(struct inode *inode, struct file *filp)
1348 {
1349 struct w83793_data *data = filp->private_data;
1350
1351 if (data->watchdog_expect_close) {
1352 watchdog_disable(data);
1353 data->watchdog_expect_close = 0;
1354 } else {
1355 watchdog_trigger(data);
1356 dev_crit(&data->client->dev,
1357 "unexpected close, not stopping watchdog!\n");
1358 }
1359
1360 clear_bit(0, &data->watchdog_is_open);
1361
1362 /* Decrease data reference counter */
1363 mutex_lock(&watchdog_data_mutex);
1364 kref_put(&data->kref, w83793_release_resources);
1365 mutex_unlock(&watchdog_data_mutex);
1366
1367 return 0;
1368 }
1369
watchdog_write(struct file * filp,const char __user * buf,size_t count,loff_t * offset)1370 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1371 size_t count, loff_t *offset)
1372 {
1373 ssize_t ret;
1374 struct w83793_data *data = filp->private_data;
1375
1376 if (count) {
1377 if (!nowayout) {
1378 size_t i;
1379
1380 /* Clear it in case it was set with a previous write */
1381 data->watchdog_expect_close = 0;
1382
1383 for (i = 0; i != count; i++) {
1384 char c;
1385 if (get_user(c, buf + i))
1386 return -EFAULT;
1387 if (c == 'V')
1388 data->watchdog_expect_close = 1;
1389 }
1390 }
1391 ret = watchdog_trigger(data);
1392 if (ret < 0)
1393 return ret;
1394 }
1395 return count;
1396 }
1397
watchdog_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1398 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1399 unsigned long arg)
1400 {
1401 struct watchdog_info ident = {
1402 .options = WDIOF_KEEPALIVEPING |
1403 WDIOF_SETTIMEOUT |
1404 WDIOF_CARDRESET,
1405 .identity = "w83793 watchdog"
1406 };
1407
1408 int val, ret = 0;
1409 struct w83793_data *data = filp->private_data;
1410
1411 switch (cmd) {
1412 case WDIOC_GETSUPPORT:
1413 if (!nowayout)
1414 ident.options |= WDIOF_MAGICCLOSE;
1415 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1416 ret = -EFAULT;
1417 break;
1418
1419 case WDIOC_GETSTATUS:
1420 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1421 ret = put_user(val, (int __user *)arg);
1422 break;
1423
1424 case WDIOC_GETBOOTSTATUS:
1425 ret = put_user(0, (int __user *)arg);
1426 break;
1427
1428 case WDIOC_KEEPALIVE:
1429 ret = watchdog_trigger(data);
1430 break;
1431
1432 case WDIOC_GETTIMEOUT:
1433 val = watchdog_get_timeout(data);
1434 ret = put_user(val, (int __user *)arg);
1435 break;
1436
1437 case WDIOC_SETTIMEOUT:
1438 if (get_user(val, (int __user *)arg)) {
1439 ret = -EFAULT;
1440 break;
1441 }
1442 ret = watchdog_set_timeout(data, val);
1443 if (ret > 0)
1444 ret = put_user(ret, (int __user *)arg);
1445 break;
1446
1447 case WDIOC_SETOPTIONS:
1448 if (get_user(val, (int __user *)arg)) {
1449 ret = -EFAULT;
1450 break;
1451 }
1452
1453 if (val & WDIOS_DISABLECARD)
1454 ret = watchdog_disable(data);
1455 else if (val & WDIOS_ENABLECARD)
1456 ret = watchdog_enable(data);
1457 else
1458 ret = -EINVAL;
1459
1460 break;
1461 default:
1462 ret = -ENOTTY;
1463 }
1464 return ret;
1465 }
1466
1467 static const struct file_operations watchdog_fops = {
1468 .owner = THIS_MODULE,
1469 .llseek = no_llseek,
1470 .open = watchdog_open,
1471 .release = watchdog_close,
1472 .write = watchdog_write,
1473 .unlocked_ioctl = watchdog_ioctl,
1474 };
1475
1476 /*
1477 * Notifier for system down
1478 */
1479
watchdog_notify_sys(struct notifier_block * this,unsigned long code,void * unused)1480 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1481 void *unused)
1482 {
1483 struct w83793_data *data = NULL;
1484
1485 if (code == SYS_DOWN || code == SYS_HALT) {
1486
1487 /* Disable each registered watchdog */
1488 mutex_lock(&watchdog_data_mutex);
1489 list_for_each_entry(data, &watchdog_data_list, list) {
1490 if (data->watchdog_miscdev.minor)
1491 watchdog_disable(data);
1492 }
1493 mutex_unlock(&watchdog_data_mutex);
1494 }
1495
1496 return NOTIFY_DONE;
1497 }
1498
1499 /*
1500 * The WDT needs to learn about soft shutdowns in order to
1501 * turn the timebomb registers off.
1502 */
1503
1504 static struct notifier_block watchdog_notifier = {
1505 .notifier_call = watchdog_notify_sys,
1506 };
1507
1508 /*
1509 * Init / remove routines
1510 */
1511
w83793_remove(struct i2c_client * client)1512 static int w83793_remove(struct i2c_client *client)
1513 {
1514 struct w83793_data *data = i2c_get_clientdata(client);
1515 struct device *dev = &client->dev;
1516 int i, tmp;
1517
1518 /* Unregister the watchdog (if registered) */
1519 if (data->watchdog_miscdev.minor) {
1520 misc_deregister(&data->watchdog_miscdev);
1521
1522 if (data->watchdog_is_open) {
1523 dev_warn(&client->dev,
1524 "i2c client detached with watchdog open! "
1525 "Stopping watchdog.\n");
1526 watchdog_disable(data);
1527 }
1528
1529 mutex_lock(&watchdog_data_mutex);
1530 list_del(&data->list);
1531 mutex_unlock(&watchdog_data_mutex);
1532
1533 /* Tell the watchdog code the client is gone */
1534 mutex_lock(&data->watchdog_lock);
1535 data->client = NULL;
1536 mutex_unlock(&data->watchdog_lock);
1537 }
1538
1539 /* Reset Configuration Register to Disable Watch Dog Registers */
1540 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1541 w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1542
1543 unregister_reboot_notifier(&watchdog_notifier);
1544
1545 hwmon_device_unregister(data->hwmon_dev);
1546
1547 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1548 device_remove_file(dev,
1549 &w83793_sensor_attr_2[i].dev_attr);
1550
1551 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1552 device_remove_file(dev, &sda_single_files[i].dev_attr);
1553
1554 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1555 device_remove_file(dev, &w83793_vid[i].dev_attr);
1556 device_remove_file(dev, &dev_attr_vrm);
1557
1558 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1559 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1560
1561 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1562 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1563
1564 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1565 device_remove_file(dev, &w83793_temp[i].dev_attr);
1566
1567 i2c_unregister_device(data->lm75[0]);
1568 i2c_unregister_device(data->lm75[1]);
1569
1570 /* Decrease data reference counter */
1571 mutex_lock(&watchdog_data_mutex);
1572 kref_put(&data->kref, w83793_release_resources);
1573 mutex_unlock(&watchdog_data_mutex);
1574
1575 return 0;
1576 }
1577
1578 static int
w83793_detect_subclients(struct i2c_client * client)1579 w83793_detect_subclients(struct i2c_client *client)
1580 {
1581 int i, id, err;
1582 int address = client->addr;
1583 u8 tmp;
1584 struct i2c_adapter *adapter = client->adapter;
1585 struct w83793_data *data = i2c_get_clientdata(client);
1586
1587 id = i2c_adapter_id(adapter);
1588 if (force_subclients[0] == id && force_subclients[1] == address) {
1589 for (i = 2; i <= 3; i++) {
1590 if (force_subclients[i] < 0x48
1591 || force_subclients[i] > 0x4f) {
1592 dev_err(&client->dev,
1593 "invalid subclient "
1594 "address %d; must be 0x48-0x4f\n",
1595 force_subclients[i]);
1596 err = -EINVAL;
1597 goto ERROR_SC_0;
1598 }
1599 }
1600 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1601 (force_subclients[2] & 0x07) |
1602 ((force_subclients[3] & 0x07) << 4));
1603 }
1604
1605 tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1606 if (!(tmp & 0x08))
1607 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1608 if (!(tmp & 0x80)) {
1609 if ((data->lm75[0] != NULL)
1610 && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1611 dev_err(&client->dev,
1612 "duplicate addresses 0x%x, "
1613 "use force_subclients\n", data->lm75[0]->addr);
1614 err = -ENODEV;
1615 goto ERROR_SC_1;
1616 }
1617 data->lm75[1] = i2c_new_dummy(adapter,
1618 0x48 + ((tmp >> 4) & 0x7));
1619 }
1620
1621 return 0;
1622
1623 /* Undo inits in case of errors */
1624
1625 ERROR_SC_1:
1626 i2c_unregister_device(data->lm75[0]);
1627 ERROR_SC_0:
1628 return err;
1629 }
1630
1631 /* Return 0 if detection is successful, -ENODEV otherwise */
w83793_detect(struct i2c_client * client,struct i2c_board_info * info)1632 static int w83793_detect(struct i2c_client *client,
1633 struct i2c_board_info *info)
1634 {
1635 u8 tmp, bank, chip_id;
1636 struct i2c_adapter *adapter = client->adapter;
1637 unsigned short address = client->addr;
1638
1639 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1640 return -ENODEV;
1641
1642 bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1643
1644 tmp = bank & 0x80 ? 0x5c : 0xa3;
1645 /* Check Winbond vendor ID */
1646 if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1647 pr_debug("w83793: Detection failed at check vendor id\n");
1648 return -ENODEV;
1649 }
1650
1651 /*
1652 * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1653 * should match
1654 */
1655 if ((bank & 0x07) == 0
1656 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1657 (address << 1)) {
1658 pr_debug("w83793: Detection failed at check i2c addr\n");
1659 return -ENODEV;
1660 }
1661
1662 /* Determine the chip type now */
1663 chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1664 if (chip_id != 0x7b)
1665 return -ENODEV;
1666
1667 strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1668
1669 return 0;
1670 }
1671
w83793_probe(struct i2c_client * client,const struct i2c_device_id * id)1672 static int w83793_probe(struct i2c_client *client,
1673 const struct i2c_device_id *id)
1674 {
1675 struct device *dev = &client->dev;
1676 static const int watchdog_minors[] = {
1677 WATCHDOG_MINOR, 212, 213, 214, 215
1678 };
1679 struct w83793_data *data;
1680 int i, tmp, val, err;
1681 int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1682 int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1683 int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1684
1685 data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1686 if (!data) {
1687 err = -ENOMEM;
1688 goto exit;
1689 }
1690
1691 i2c_set_clientdata(client, data);
1692 data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1693 mutex_init(&data->update_lock);
1694 mutex_init(&data->watchdog_lock);
1695 INIT_LIST_HEAD(&data->list);
1696 kref_init(&data->kref);
1697
1698 /*
1699 * Store client pointer in our data struct for watchdog usage
1700 * (where the client is found through a data ptr instead of the
1701 * otherway around)
1702 */
1703 data->client = client;
1704
1705 err = w83793_detect_subclients(client);
1706 if (err)
1707 goto free_mem;
1708
1709 /* Initialize the chip */
1710 w83793_init_client(client);
1711
1712 /*
1713 * Only fan 1-5 has their own input pins,
1714 * Pwm 1-3 has their own pins
1715 */
1716 data->has_fan = 0x1f;
1717 data->has_pwm = 0x07;
1718 tmp = w83793_read_value(client, W83793_REG_MFC);
1719 val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1720
1721 /* check the function of pins 49-56 */
1722 if (tmp & 0x80) {
1723 data->has_vid |= 0x2; /* has VIDB */
1724 } else {
1725 data->has_pwm |= 0x18; /* pwm 4,5 */
1726 if (val & 0x01) { /* fan 6 */
1727 data->has_fan |= 0x20;
1728 data->has_pwm |= 0x20;
1729 }
1730 if (val & 0x02) { /* fan 7 */
1731 data->has_fan |= 0x40;
1732 data->has_pwm |= 0x40;
1733 }
1734 if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */
1735 data->has_fan |= 0x80;
1736 data->has_pwm |= 0x80;
1737 }
1738 }
1739
1740 /* check the function of pins 37-40 */
1741 if (!(tmp & 0x29))
1742 data->has_vid |= 0x1; /* has VIDA */
1743 if (0x08 == (tmp & 0x0c)) {
1744 if (val & 0x08) /* fan 9 */
1745 data->has_fan |= 0x100;
1746 if (val & 0x10) /* fan 10 */
1747 data->has_fan |= 0x200;
1748 }
1749 if (0x20 == (tmp & 0x30)) {
1750 if (val & 0x20) /* fan 11 */
1751 data->has_fan |= 0x400;
1752 if (val & 0x40) /* fan 12 */
1753 data->has_fan |= 0x800;
1754 }
1755
1756 if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */
1757 data->has_fan |= 0x80;
1758 data->has_pwm |= 0x80;
1759 }
1760
1761 tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1762 if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */
1763 data->has_fan |= 0x100;
1764 }
1765 if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */
1766 data->has_fan |= 0x200;
1767 }
1768 if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */
1769 data->has_fan |= 0x400;
1770 }
1771 if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */
1772 data->has_fan |= 0x800;
1773 }
1774
1775 /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1776 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1777 if (tmp & 0x01)
1778 data->has_temp |= 0x01;
1779 if (tmp & 0x04)
1780 data->has_temp |= 0x02;
1781 if (tmp & 0x10)
1782 data->has_temp |= 0x04;
1783 if (tmp & 0x40)
1784 data->has_temp |= 0x08;
1785
1786 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1787 if (tmp & 0x01)
1788 data->has_temp |= 0x10;
1789 if (tmp & 0x02)
1790 data->has_temp |= 0x20;
1791
1792 /* Register sysfs hooks */
1793 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1794 err = device_create_file(dev,
1795 &w83793_sensor_attr_2[i].dev_attr);
1796 if (err)
1797 goto exit_remove;
1798 }
1799
1800 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1801 if (!(data->has_vid & (1 << i)))
1802 continue;
1803 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1804 if (err)
1805 goto exit_remove;
1806 }
1807 if (data->has_vid) {
1808 data->vrm = vid_which_vrm();
1809 err = device_create_file(dev, &dev_attr_vrm);
1810 if (err)
1811 goto exit_remove;
1812 }
1813
1814 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1815 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1816 if (err)
1817 goto exit_remove;
1818
1819 }
1820
1821 for (i = 0; i < 6; i++) {
1822 int j;
1823 if (!(data->has_temp & (1 << i)))
1824 continue;
1825 for (j = 0; j < files_temp; j++) {
1826 err = device_create_file(dev,
1827 &w83793_temp[(i) * files_temp
1828 + j].dev_attr);
1829 if (err)
1830 goto exit_remove;
1831 }
1832 }
1833
1834 for (i = 5; i < 12; i++) {
1835 int j;
1836 if (!(data->has_fan & (1 << i)))
1837 continue;
1838 for (j = 0; j < files_fan; j++) {
1839 err = device_create_file(dev,
1840 &w83793_left_fan[(i - 5) * files_fan
1841 + j].dev_attr);
1842 if (err)
1843 goto exit_remove;
1844 }
1845 }
1846
1847 for (i = 3; i < 8; i++) {
1848 int j;
1849 if (!(data->has_pwm & (1 << i)))
1850 continue;
1851 for (j = 0; j < files_pwm; j++) {
1852 err = device_create_file(dev,
1853 &w83793_left_pwm[(i - 3) * files_pwm
1854 + j].dev_attr);
1855 if (err)
1856 goto exit_remove;
1857 }
1858 }
1859
1860 data->hwmon_dev = hwmon_device_register(dev);
1861 if (IS_ERR(data->hwmon_dev)) {
1862 err = PTR_ERR(data->hwmon_dev);
1863 goto exit_remove;
1864 }
1865
1866 /* Watchdog initialization */
1867
1868 /* Register boot notifier */
1869 err = register_reboot_notifier(&watchdog_notifier);
1870 if (err != 0) {
1871 dev_err(&client->dev,
1872 "cannot register reboot notifier (err=%d)\n", err);
1873 goto exit_devunreg;
1874 }
1875
1876 /*
1877 * Enable Watchdog registers.
1878 * Set Configuration Register to Enable Watch Dog Registers
1879 * (Bit 2) = XXXX, X1XX.
1880 */
1881 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1882 w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1883
1884 /* Set the default watchdog timeout */
1885 data->watchdog_timeout = timeout;
1886
1887 /* Check, if last reboot was caused by watchdog */
1888 data->watchdog_caused_reboot =
1889 w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1890
1891 /* Disable Soft Watchdog during initialiation */
1892 watchdog_disable(data);
1893
1894 /*
1895 * We take the data_mutex lock early so that watchdog_open() cannot
1896 * run when misc_register() has completed, but we've not yet added
1897 * our data to the watchdog_data_list (and set the default timeout)
1898 */
1899 mutex_lock(&watchdog_data_mutex);
1900 for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1901 /* Register our watchdog part */
1902 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1903 "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1904 data->watchdog_miscdev.name = data->watchdog_name;
1905 data->watchdog_miscdev.fops = &watchdog_fops;
1906 data->watchdog_miscdev.minor = watchdog_minors[i];
1907
1908 err = misc_register(&data->watchdog_miscdev);
1909 if (err == -EBUSY)
1910 continue;
1911 if (err) {
1912 data->watchdog_miscdev.minor = 0;
1913 dev_err(&client->dev,
1914 "Registering watchdog chardev: %d\n", err);
1915 break;
1916 }
1917
1918 list_add(&data->list, &watchdog_data_list);
1919
1920 dev_info(&client->dev,
1921 "Registered watchdog chardev major 10, minor: %d\n",
1922 watchdog_minors[i]);
1923 break;
1924 }
1925 if (i == ARRAY_SIZE(watchdog_minors)) {
1926 data->watchdog_miscdev.minor = 0;
1927 dev_warn(&client->dev,
1928 "Couldn't register watchdog chardev (due to no free minor)\n");
1929 }
1930
1931 mutex_unlock(&watchdog_data_mutex);
1932
1933 return 0;
1934
1935 /* Unregister hwmon device */
1936
1937 exit_devunreg:
1938
1939 hwmon_device_unregister(data->hwmon_dev);
1940
1941 /* Unregister sysfs hooks */
1942
1943 exit_remove:
1944 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1945 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1946
1947 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1948 device_remove_file(dev, &sda_single_files[i].dev_attr);
1949
1950 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1951 device_remove_file(dev, &w83793_vid[i].dev_attr);
1952
1953 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1954 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1955
1956 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1957 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1958
1959 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1960 device_remove_file(dev, &w83793_temp[i].dev_attr);
1961
1962 i2c_unregister_device(data->lm75[0]);
1963 i2c_unregister_device(data->lm75[1]);
1964 free_mem:
1965 kfree(data);
1966 exit:
1967 return err;
1968 }
1969
w83793_update_nonvolatile(struct device * dev)1970 static void w83793_update_nonvolatile(struct device *dev)
1971 {
1972 struct i2c_client *client = to_i2c_client(dev);
1973 struct w83793_data *data = i2c_get_clientdata(client);
1974 int i, j;
1975 /*
1976 * They are somewhat "stable" registers, and to update them every time
1977 * takes so much time, it's just not worthy. Update them in a long
1978 * interval to avoid exception.
1979 */
1980 if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1981 || !data->valid))
1982 return;
1983 /* update voltage limits */
1984 for (i = 1; i < 3; i++) {
1985 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1986 data->in[j][i] =
1987 w83793_read_value(client, W83793_REG_IN[j][i]);
1988 }
1989 data->in_low_bits[i] =
1990 w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1991 }
1992
1993 for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1994 /* Update the Fan measured value and limits */
1995 if (!(data->has_fan & (1 << i)))
1996 continue;
1997 data->fan_min[i] =
1998 w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1999 data->fan_min[i] |=
2000 w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
2001 }
2002
2003 for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
2004 if (!(data->has_temp & (1 << i)))
2005 continue;
2006 data->temp_fan_map[i] =
2007 w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
2008 for (j = 1; j < 5; j++) {
2009 data->temp[i][j] =
2010 w83793_read_value(client, W83793_REG_TEMP[i][j]);
2011 }
2012 data->temp_cruise[i] =
2013 w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2014 for (j = 0; j < 7; j++) {
2015 data->sf2_pwm[i][j] =
2016 w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2017 data->sf2_temp[i][j] =
2018 w83793_read_value(client,
2019 W83793_REG_SF2_TEMP(i, j));
2020 }
2021 }
2022
2023 for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2024 data->temp_mode[i] =
2025 w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2026
2027 for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2028 data->tolerance[i] =
2029 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2030 }
2031
2032 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2033 if (!(data->has_pwm & (1 << i)))
2034 continue;
2035 data->pwm[i][PWM_NONSTOP] =
2036 w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2037 data->pwm[i][PWM_START] =
2038 w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2039 data->pwm_stop_time[i] =
2040 w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2041 }
2042
2043 data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2044 data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2045 data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2046 data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2047 data->temp_critical =
2048 w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2049 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2050
2051 for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2052 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2053
2054 data->last_nonvolatile = jiffies;
2055 }
2056
w83793_update_device(struct device * dev)2057 static struct w83793_data *w83793_update_device(struct device *dev)
2058 {
2059 struct i2c_client *client = to_i2c_client(dev);
2060 struct w83793_data *data = i2c_get_clientdata(client);
2061 int i;
2062
2063 mutex_lock(&data->update_lock);
2064
2065 if (!(time_after(jiffies, data->last_updated + HZ * 2)
2066 || !data->valid))
2067 goto END;
2068
2069 /* Update the voltages measured value and limits */
2070 for (i = 0; i < ARRAY_SIZE(data->in); i++)
2071 data->in[i][IN_READ] =
2072 w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2073
2074 data->in_low_bits[IN_READ] =
2075 w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2076
2077 for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2078 if (!(data->has_fan & (1 << i)))
2079 continue;
2080 data->fan[i] =
2081 w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2082 data->fan[i] |=
2083 w83793_read_value(client, W83793_REG_FAN(i) + 1);
2084 }
2085
2086 for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2087 if (!(data->has_temp & (1 << i)))
2088 continue;
2089 data->temp[i][TEMP_READ] =
2090 w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2091 }
2092
2093 data->temp_low_bits =
2094 w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2095
2096 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2097 if (data->has_pwm & (1 << i))
2098 data->pwm[i][PWM_DUTY] =
2099 w83793_read_value(client,
2100 W83793_REG_PWM(i, PWM_DUTY));
2101 }
2102
2103 for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2104 data->alarms[i] =
2105 w83793_read_value(client, W83793_REG_ALARM(i));
2106 if (data->has_vid & 0x01)
2107 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2108 if (data->has_vid & 0x02)
2109 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2110 w83793_update_nonvolatile(dev);
2111 data->last_updated = jiffies;
2112 data->valid = 1;
2113
2114 END:
2115 mutex_unlock(&data->update_lock);
2116 return data;
2117 }
2118
2119 /*
2120 * Ignore the possibility that somebody change bank outside the driver
2121 * Must be called with data->update_lock held, except during initialization
2122 */
w83793_read_value(struct i2c_client * client,u16 reg)2123 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2124 {
2125 struct w83793_data *data = i2c_get_clientdata(client);
2126 u8 res = 0xff;
2127 u8 new_bank = reg >> 8;
2128
2129 new_bank |= data->bank & 0xfc;
2130 if (data->bank != new_bank) {
2131 if (i2c_smbus_write_byte_data
2132 (client, W83793_REG_BANKSEL, new_bank) >= 0)
2133 data->bank = new_bank;
2134 else {
2135 dev_err(&client->dev,
2136 "set bank to %d failed, fall back "
2137 "to bank %d, read reg 0x%x error\n",
2138 new_bank, data->bank, reg);
2139 res = 0x0; /* read 0x0 from the chip */
2140 goto END;
2141 }
2142 }
2143 res = i2c_smbus_read_byte_data(client, reg & 0xff);
2144 END:
2145 return res;
2146 }
2147
2148 /* Must be called with data->update_lock held, except during initialization */
w83793_write_value(struct i2c_client * client,u16 reg,u8 value)2149 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2150 {
2151 struct w83793_data *data = i2c_get_clientdata(client);
2152 int res;
2153 u8 new_bank = reg >> 8;
2154
2155 new_bank |= data->bank & 0xfc;
2156 if (data->bank != new_bank) {
2157 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2158 new_bank);
2159 if (res < 0) {
2160 dev_err(&client->dev,
2161 "set bank to %d failed, fall back "
2162 "to bank %d, write reg 0x%x error\n",
2163 new_bank, data->bank, reg);
2164 goto END;
2165 }
2166 data->bank = new_bank;
2167 }
2168
2169 res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2170 END:
2171 return res;
2172 }
2173
2174 module_i2c_driver(w83793_driver);
2175
2176 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2177 MODULE_DESCRIPTION("w83793 driver");
2178 MODULE_LICENSE("GPL");
2179
