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Merge branch 'linux-next' of git://git.open-osd.org/linux-open-osd
[deliverable/linux.git] / drivers / hwmon / w83793.c
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
50 /* Default values */
51 #define WATCHDOG_TIMEOUT 2 /* 2 minute default timeout */
52
53 /* Addresses to scan */
54 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
55 I2C_CLIENT_END };
56
57 /* Insmod parameters */
58
59 static unsigned short force_subclients[4];
60 module_param_array(force_subclients, short, NULL, 0);
61 MODULE_PARM_DESC(force_subclients, "List of subclient addresses: "
62 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
63
64 static bool reset;
65 module_param(reset, bool, 0);
66 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
67
68 static int timeout = WATCHDOG_TIMEOUT; /* default timeout in minutes */
69 module_param(timeout, int, 0);
70 MODULE_PARM_DESC(timeout,
71 "Watchdog timeout in minutes. 2<= timeout <=255 (default="
72 __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
73
74 static bool nowayout = WATCHDOG_NOWAYOUT;
75 module_param(nowayout, bool, 0);
76 MODULE_PARM_DESC(nowayout,
77 "Watchdog cannot be stopped once started (default="
78 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
79
80 /*
81 * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
82 * as ID, Bank Select registers
83 */
84 #define W83793_REG_BANKSEL 0x00
85 #define W83793_REG_VENDORID 0x0d
86 #define W83793_REG_CHIPID 0x0e
87 #define W83793_REG_DEVICEID 0x0f
88
89 #define W83793_REG_CONFIG 0x40
90 #define W83793_REG_MFC 0x58
91 #define W83793_REG_FANIN_CTRL 0x5c
92 #define W83793_REG_FANIN_SEL 0x5d
93 #define W83793_REG_I2C_ADDR 0x0b
94 #define W83793_REG_I2C_SUBADDR 0x0c
95 #define W83793_REG_VID_INA 0x05
96 #define W83793_REG_VID_INB 0x06
97 #define W83793_REG_VID_LATCHA 0x07
98 #define W83793_REG_VID_LATCHB 0x08
99 #define W83793_REG_VID_CTRL 0x59
100
101 #define W83793_REG_WDT_LOCK 0x01
102 #define W83793_REG_WDT_ENABLE 0x02
103 #define W83793_REG_WDT_STATUS 0x03
104 #define W83793_REG_WDT_TIMEOUT 0x04
105
106 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
107
108 #define TEMP_READ 0
109 #define TEMP_CRIT 1
110 #define TEMP_CRIT_HYST 2
111 #define TEMP_WARN 3
112 #define TEMP_WARN_HYST 4
113 /*
114 * only crit and crit_hyst affect real-time alarm status
115 * current crit crit_hyst warn warn_hyst
116 */
117 static u16 W83793_REG_TEMP[][5] = {
118 {0x1c, 0x78, 0x79, 0x7a, 0x7b},
119 {0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
120 {0x1e, 0x80, 0x81, 0x82, 0x83},
121 {0x1f, 0x84, 0x85, 0x86, 0x87},
122 {0x20, 0x88, 0x89, 0x8a, 0x8b},
123 {0x21, 0x8c, 0x8d, 0x8e, 0x8f},
124 };
125
126 #define W83793_REG_TEMP_LOW_BITS 0x22
127
128 #define W83793_REG_BEEP(index) (0x53 + (index))
129 #define W83793_REG_ALARM(index) (0x4b + (index))
130
131 #define W83793_REG_CLR_CHASSIS 0x4a /* SMI MASK4 */
132 #define W83793_REG_IRQ_CTRL 0x50
133 #define W83793_REG_OVT_CTRL 0x51
134 #define W83793_REG_OVT_BEEP 0x52
135
136 #define IN_READ 0
137 #define IN_MAX 1
138 #define IN_LOW 2
139 static const u16 W83793_REG_IN[][3] = {
140 /* Current, High, Low */
141 {0x10, 0x60, 0x61}, /* Vcore A */
142 {0x11, 0x62, 0x63}, /* Vcore B */
143 {0x12, 0x64, 0x65}, /* Vtt */
144 {0x14, 0x6a, 0x6b}, /* VSEN1 */
145 {0x15, 0x6c, 0x6d}, /* VSEN2 */
146 {0x16, 0x6e, 0x6f}, /* +3VSEN */
147 {0x17, 0x70, 0x71}, /* +12VSEN */
148 {0x18, 0x72, 0x73}, /* 5VDD */
149 {0x19, 0x74, 0x75}, /* 5VSB */
150 {0x1a, 0x76, 0x77}, /* VBAT */
151 };
152
153 /* Low Bits of Vcore A/B Vtt Read/High/Low */
154 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
155 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
156 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
157
158 #define W83793_REG_FAN(index) (0x23 + 2 * (index)) /* High byte */
159 #define W83793_REG_FAN_MIN(index) (0x90 + 2 * (index)) /* High byte */
160
161 #define W83793_REG_PWM_DEFAULT 0xb2
162 #define W83793_REG_PWM_ENABLE 0x207
163 #define W83793_REG_PWM_UPTIME 0xc3 /* Unit in 0.1 second */
164 #define W83793_REG_PWM_DOWNTIME 0xc4 /* Unit in 0.1 second */
165 #define W83793_REG_TEMP_CRITICAL 0xc5
166
167 #define PWM_DUTY 0
168 #define PWM_START 1
169 #define PWM_NONSTOP 2
170 #define PWM_STOP_TIME 3
171 #define W83793_REG_PWM(index, nr) (((nr) == 0 ? 0xb3 : \
172 (nr) == 1 ? 0x220 : 0x218) + (index))
173
174 /* bit field, fan1 is bit0, fan2 is bit1 ... */
175 #define W83793_REG_TEMP_FAN_MAP(index) (0x201 + (index))
176 #define W83793_REG_TEMP_TOL(index) (0x208 + (index))
177 #define W83793_REG_TEMP_CRUISE(index) (0x210 + (index))
178 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
179 #define W83793_REG_SF2_TEMP(index, nr) (0x230 + ((index) << 4) + (nr))
180 #define W83793_REG_SF2_PWM(index, nr) (0x238 + ((index) << 4) + (nr))
181
182 static inline unsigned long FAN_FROM_REG(u16 val)
183 {
184 if ((val >= 0xfff) || (val == 0))
185 return 0;
186 return 1350000UL / val;
187 }
188
189 static inline u16 FAN_TO_REG(long rpm)
190 {
191 if (rpm <= 0)
192 return 0x0fff;
193 return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
194 }
195
196 static inline unsigned long TIME_FROM_REG(u8 reg)
197 {
198 return reg * 100;
199 }
200
201 static inline u8 TIME_TO_REG(unsigned long val)
202 {
203 return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
204 }
205
206 static inline long TEMP_FROM_REG(s8 reg)
207 {
208 return reg * 1000;
209 }
210
211 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
212 {
213 return SENSORS_LIMIT((val + (val < 0 ? -500 : 500)) / 1000, min, max);
214 }
215
216 struct w83793_data {
217 struct i2c_client *lm75[2];
218 struct device *hwmon_dev;
219 struct mutex update_lock;
220 char valid; /* !=0 if following fields are valid */
221 unsigned long last_updated; /* In jiffies */
222 unsigned long last_nonvolatile; /* In jiffies, last time we update the
223 * nonvolatile registers
224 */
225
226 u8 bank;
227 u8 vrm;
228 u8 vid[2];
229 u8 in[10][3]; /* Register value, read/high/low */
230 u8 in_low_bits[3]; /* Additional resolution for VCore A/B Vtt */
231
232 u16 has_fan; /* Only fan1- fan5 has own pins */
233 u16 fan[12]; /* Register value combine */
234 u16 fan_min[12]; /* Register value combine */
235
236 s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */
237 u8 temp_low_bits; /* Additional resolution TD1-TD4 */
238 u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits
239 * byte 1: Temp R1,R2 mode, each has 1 bit
240 */
241 u8 temp_critical; /* If reached all fan will be at full speed */
242 u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */
243
244 u8 has_pwm;
245 u8 has_temp;
246 u8 has_vid;
247 u8 pwm_enable; /* Register value, each Temp has 1 bit */
248 u8 pwm_uptime; /* Register value */
249 u8 pwm_downtime; /* Register value */
250 u8 pwm_default; /* All fan default pwm, next poweron valid */
251 u8 pwm[8][3]; /* Register value */
252 u8 pwm_stop_time[8];
253 u8 temp_cruise[6];
254
255 u8 alarms[5]; /* realtime status registers */
256 u8 beeps[5];
257 u8 beep_enable;
258 u8 tolerance[3]; /* Temp tolerance(Smart Fan I/II) */
259 u8 sf2_pwm[6][7]; /* Smart FanII: Fan duty cycle */
260 u8 sf2_temp[6][7]; /* Smart FanII: Temp level point */
261
262 /* watchdog */
263 struct i2c_client *client;
264 struct mutex watchdog_lock;
265 struct list_head list; /* member of the watchdog_data_list */
266 struct kref kref;
267 struct miscdevice watchdog_miscdev;
268 unsigned long watchdog_is_open;
269 char watchdog_expect_close;
270 char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
271 unsigned int watchdog_caused_reboot;
272 int watchdog_timeout; /* watchdog timeout in minutes */
273 };
274
275 /*
276 * Somewhat ugly :( global data pointer list with all devices, so that
277 * we can find our device data as when using misc_register. There is no
278 * other method to get to one's device data from the open file-op and
279 * for usage in the reboot notifier callback.
280 */
281 static LIST_HEAD(watchdog_data_list);
282
283 /* Note this lock not only protect list access, but also data.kref access */
284 static DEFINE_MUTEX(watchdog_data_mutex);
285
286 /*
287 * Release our data struct when we're detached from the i2c client *and* all
288 * references to our watchdog device are released
289 */
290 static void w83793_release_resources(struct kref *ref)
291 {
292 struct w83793_data *data = container_of(ref, struct w83793_data, kref);
293 kfree(data);
294 }
295
296 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
297 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
298 static int w83793_probe(struct i2c_client *client,
299 const struct i2c_device_id *id);
300 static int w83793_detect(struct i2c_client *client,
301 struct i2c_board_info *info);
302 static int w83793_remove(struct i2c_client *client);
303 static void w83793_init_client(struct i2c_client *client);
304 static void w83793_update_nonvolatile(struct device *dev);
305 static struct w83793_data *w83793_update_device(struct device *dev);
306
307 static const struct i2c_device_id w83793_id[] = {
308 { "w83793", 0 },
309 { }
310 };
311 MODULE_DEVICE_TABLE(i2c, w83793_id);
312
313 static struct i2c_driver w83793_driver = {
314 .class = I2C_CLASS_HWMON,
315 .driver = {
316 .name = "w83793",
317 },
318 .probe = w83793_probe,
319 .remove = w83793_remove,
320 .id_table = w83793_id,
321 .detect = w83793_detect,
322 .address_list = normal_i2c,
323 };
324
325 static ssize_t
326 show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
327 {
328 struct w83793_data *data = dev_get_drvdata(dev);
329 return sprintf(buf, "%d\n", data->vrm);
330 }
331
332 static ssize_t
333 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
334 {
335 struct w83793_data *data = w83793_update_device(dev);
336 struct sensor_device_attribute_2 *sensor_attr =
337 to_sensor_dev_attr_2(attr);
338 int index = sensor_attr->index;
339
340 return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
341 }
342
343 static ssize_t
344 store_vrm(struct device *dev, struct device_attribute *attr,
345 const char *buf, size_t count)
346 {
347 struct w83793_data *data = dev_get_drvdata(dev);
348 unsigned long val;
349 int err;
350
351 err = kstrtoul(buf, 10, &val);
352 if (err)
353 return err;
354
355 data->vrm = val;
356 return count;
357 }
358
359 #define ALARM_STATUS 0
360 #define BEEP_ENABLE 1
361 static ssize_t
362 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
363 {
364 struct w83793_data *data = w83793_update_device(dev);
365 struct sensor_device_attribute_2 *sensor_attr =
366 to_sensor_dev_attr_2(attr);
367 int nr = sensor_attr->nr;
368 int index = sensor_attr->index >> 3;
369 int bit = sensor_attr->index & 0x07;
370 u8 val;
371
372 if (nr == ALARM_STATUS) {
373 val = (data->alarms[index] >> (bit)) & 1;
374 } else { /* BEEP_ENABLE */
375 val = (data->beeps[index] >> (bit)) & 1;
376 }
377
378 return sprintf(buf, "%u\n", val);
379 }
380
381 static ssize_t
382 store_beep(struct device *dev, struct device_attribute *attr,
383 const char *buf, size_t count)
384 {
385 struct i2c_client *client = to_i2c_client(dev);
386 struct w83793_data *data = i2c_get_clientdata(client);
387 struct sensor_device_attribute_2 *sensor_attr =
388 to_sensor_dev_attr_2(attr);
389 int index = sensor_attr->index >> 3;
390 int shift = sensor_attr->index & 0x07;
391 u8 beep_bit = 1 << shift;
392 unsigned long val;
393 int err;
394
395 err = kstrtoul(buf, 10, &val);
396 if (err)
397 return err;
398
399 if (val > 1)
400 return -EINVAL;
401
402 mutex_lock(&data->update_lock);
403 data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
404 data->beeps[index] &= ~beep_bit;
405 data->beeps[index] |= val << shift;
406 w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
407 mutex_unlock(&data->update_lock);
408
409 return count;
410 }
411
412 static ssize_t
413 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
414 {
415 struct w83793_data *data = w83793_update_device(dev);
416 return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
417 }
418
419 static ssize_t
420 store_beep_enable(struct device *dev, struct device_attribute *attr,
421 const char *buf, size_t count)
422 {
423 struct i2c_client *client = to_i2c_client(dev);
424 struct w83793_data *data = i2c_get_clientdata(client);
425 unsigned long val;
426 int err;
427
428 err = kstrtoul(buf, 10, &val);
429 if (err)
430 return err;
431
432 if (val > 1)
433 return -EINVAL;
434
435 mutex_lock(&data->update_lock);
436 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
437 & 0xfd;
438 data->beep_enable |= val << 1;
439 w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
440 mutex_unlock(&data->update_lock);
441
442 return count;
443 }
444
445 /* Write 0 to clear chassis alarm */
446 static ssize_t
447 store_chassis_clear(struct device *dev,
448 struct device_attribute *attr, const char *buf,
449 size_t count)
450 {
451 struct i2c_client *client = to_i2c_client(dev);
452 struct w83793_data *data = i2c_get_clientdata(client);
453 unsigned long val;
454 u8 reg;
455 int err;
456
457 err = kstrtoul(buf, 10, &val);
458 if (err)
459 return err;
460 if (val)
461 return -EINVAL;
462
463 mutex_lock(&data->update_lock);
464 reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
465 w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
466 data->valid = 0; /* Force cache refresh */
467 mutex_unlock(&data->update_lock);
468 return count;
469 }
470
471 #define FAN_INPUT 0
472 #define FAN_MIN 1
473 static ssize_t
474 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
475 {
476 struct sensor_device_attribute_2 *sensor_attr =
477 to_sensor_dev_attr_2(attr);
478 int nr = sensor_attr->nr;
479 int index = sensor_attr->index;
480 struct w83793_data *data = w83793_update_device(dev);
481 u16 val;
482
483 if (nr == FAN_INPUT)
484 val = data->fan[index] & 0x0fff;
485 else
486 val = data->fan_min[index] & 0x0fff;
487
488 return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
489 }
490
491 static ssize_t
492 store_fan_min(struct device *dev, struct device_attribute *attr,
493 const char *buf, size_t count)
494 {
495 struct sensor_device_attribute_2 *sensor_attr =
496 to_sensor_dev_attr_2(attr);
497 int index = sensor_attr->index;
498 struct i2c_client *client = to_i2c_client(dev);
499 struct w83793_data *data = i2c_get_clientdata(client);
500 unsigned long val;
501 int err;
502
503 err = kstrtoul(buf, 10, &val);
504 if (err)
505 return err;
506 val = FAN_TO_REG(val);
507
508 mutex_lock(&data->update_lock);
509 data->fan_min[index] = val;
510 w83793_write_value(client, W83793_REG_FAN_MIN(index),
511 (val >> 8) & 0xff);
512 w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
513 mutex_unlock(&data->update_lock);
514
515 return count;
516 }
517
518 static ssize_t
519 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
520 {
521 struct sensor_device_attribute_2 *sensor_attr =
522 to_sensor_dev_attr_2(attr);
523 struct w83793_data *data = w83793_update_device(dev);
524 u16 val;
525 int nr = sensor_attr->nr;
526 int index = sensor_attr->index;
527
528 if (nr == PWM_STOP_TIME)
529 val = TIME_FROM_REG(data->pwm_stop_time[index]);
530 else
531 val = (data->pwm[index][nr] & 0x3f) << 2;
532
533 return sprintf(buf, "%d\n", val);
534 }
535
536 static ssize_t
537 store_pwm(struct device *dev, struct device_attribute *attr,
538 const char *buf, size_t count)
539 {
540 struct i2c_client *client = to_i2c_client(dev);
541 struct w83793_data *data = i2c_get_clientdata(client);
542 struct sensor_device_attribute_2 *sensor_attr =
543 to_sensor_dev_attr_2(attr);
544 int nr = sensor_attr->nr;
545 int index = sensor_attr->index;
546 unsigned long val;
547 int err;
548
549 err = kstrtoul(buf, 10, &val);
550 if (err)
551 return err;
552
553 mutex_lock(&data->update_lock);
554 if (nr == PWM_STOP_TIME) {
555 val = TIME_TO_REG(val);
556 data->pwm_stop_time[index] = val;
557 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
558 val);
559 } else {
560 val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
561 data->pwm[index][nr] =
562 w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
563 data->pwm[index][nr] |= val;
564 w83793_write_value(client, W83793_REG_PWM(index, nr),
565 data->pwm[index][nr]);
566 }
567
568 mutex_unlock(&data->update_lock);
569 return count;
570 }
571
572 static ssize_t
573 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
574 {
575 struct sensor_device_attribute_2 *sensor_attr =
576 to_sensor_dev_attr_2(attr);
577 int nr = sensor_attr->nr;
578 int index = sensor_attr->index;
579 struct w83793_data *data = w83793_update_device(dev);
580 long temp = TEMP_FROM_REG(data->temp[index][nr]);
581
582 if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */
583 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
584 temp += temp > 0 ? low : -low;
585 }
586 return sprintf(buf, "%ld\n", temp);
587 }
588
589 static ssize_t
590 store_temp(struct device *dev, struct device_attribute *attr,
591 const char *buf, size_t count)
592 {
593 struct sensor_device_attribute_2 *sensor_attr =
594 to_sensor_dev_attr_2(attr);
595 int nr = sensor_attr->nr;
596 int index = sensor_attr->index;
597 struct i2c_client *client = to_i2c_client(dev);
598 struct w83793_data *data = i2c_get_clientdata(client);
599 long tmp;
600 int err;
601
602 err = kstrtol(buf, 10, &tmp);
603 if (err)
604 return err;
605
606 mutex_lock(&data->update_lock);
607 data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
608 w83793_write_value(client, W83793_REG_TEMP[index][nr],
609 data->temp[index][nr]);
610 mutex_unlock(&data->update_lock);
611 return count;
612 }
613
614 /*
615 * TD1-TD4
616 * each has 4 mode:(2 bits)
617 * 0: Stop monitor
618 * 1: Use internal temp sensor(default)
619 * 2: Reserved
620 * 3: Use sensor in Intel CPU and get result by PECI
621 *
622 * TR1-TR2
623 * each has 2 mode:(1 bit)
624 * 0: Disable temp sensor monitor
625 * 1: To enable temp sensors monitor
626 */
627
628 /* 0 disable, 6 PECI */
629 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
630
631 static ssize_t
632 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
633 {
634 struct w83793_data *data = w83793_update_device(dev);
635 struct sensor_device_attribute_2 *sensor_attr =
636 to_sensor_dev_attr_2(attr);
637 int index = sensor_attr->index;
638 u8 mask = (index < 4) ? 0x03 : 0x01;
639 u8 shift = (index < 4) ? (2 * index) : (index - 4);
640 u8 tmp;
641 index = (index < 4) ? 0 : 1;
642
643 tmp = (data->temp_mode[index] >> shift) & mask;
644
645 /* for the internal sensor, found out if diode or thermistor */
646 if (tmp == 1)
647 tmp = index == 0 ? 3 : 4;
648 else
649 tmp = TO_TEMP_MODE[tmp];
650
651 return sprintf(buf, "%d\n", tmp);
652 }
653
654 static ssize_t
655 store_temp_mode(struct device *dev, struct device_attribute *attr,
656 const char *buf, size_t count)
657 {
658 struct i2c_client *client = to_i2c_client(dev);
659 struct w83793_data *data = i2c_get_clientdata(client);
660 struct sensor_device_attribute_2 *sensor_attr =
661 to_sensor_dev_attr_2(attr);
662 int index = sensor_attr->index;
663 u8 mask = (index < 4) ? 0x03 : 0x01;
664 u8 shift = (index < 4) ? (2 * index) : (index - 4);
665 unsigned long val;
666 int err;
667
668 err = kstrtoul(buf, 10, &val);
669 if (err)
670 return err;
671
672 /* transform the sysfs interface values into table above */
673 if ((val == 6) && (index < 4)) {
674 val -= 3;
675 } else if ((val == 3 && index < 4)
676 || (val == 4 && index >= 4)) {
677 /* transform diode or thermistor into internal enable */
678 val = !!val;
679 } else {
680 return -EINVAL;
681 }
682
683 index = (index < 4) ? 0 : 1;
684 mutex_lock(&data->update_lock);
685 data->temp_mode[index] =
686 w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
687 data->temp_mode[index] &= ~(mask << shift);
688 data->temp_mode[index] |= val << shift;
689 w83793_write_value(client, W83793_REG_TEMP_MODE[index],
690 data->temp_mode[index]);
691 mutex_unlock(&data->update_lock);
692
693 return count;
694 }
695
696 #define SETUP_PWM_DEFAULT 0
697 #define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */
698 #define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */
699 #define SETUP_TEMP_CRITICAL 3
700 static ssize_t
701 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
702 {
703 struct sensor_device_attribute_2 *sensor_attr =
704 to_sensor_dev_attr_2(attr);
705 int nr = sensor_attr->nr;
706 struct w83793_data *data = w83793_update_device(dev);
707 u32 val = 0;
708
709 if (nr == SETUP_PWM_DEFAULT)
710 val = (data->pwm_default & 0x3f) << 2;
711 else if (nr == SETUP_PWM_UPTIME)
712 val = TIME_FROM_REG(data->pwm_uptime);
713 else if (nr == SETUP_PWM_DOWNTIME)
714 val = TIME_FROM_REG(data->pwm_downtime);
715 else if (nr == SETUP_TEMP_CRITICAL)
716 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
717
718 return sprintf(buf, "%d\n", val);
719 }
720
721 static ssize_t
722 store_sf_setup(struct device *dev, struct device_attribute *attr,
723 const char *buf, size_t count)
724 {
725 struct sensor_device_attribute_2 *sensor_attr =
726 to_sensor_dev_attr_2(attr);
727 int nr = sensor_attr->nr;
728 struct i2c_client *client = to_i2c_client(dev);
729 struct w83793_data *data = i2c_get_clientdata(client);
730 long val;
731 int err;
732
733 err = kstrtol(buf, 10, &val);
734 if (err)
735 return err;
736
737 mutex_lock(&data->update_lock);
738 if (nr == SETUP_PWM_DEFAULT) {
739 data->pwm_default =
740 w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
741 data->pwm_default |= SENSORS_LIMIT(val, 0, 0xff) >> 2;
742 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
743 data->pwm_default);
744 } else if (nr == SETUP_PWM_UPTIME) {
745 data->pwm_uptime = TIME_TO_REG(val);
746 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
747 w83793_write_value(client, W83793_REG_PWM_UPTIME,
748 data->pwm_uptime);
749 } else if (nr == SETUP_PWM_DOWNTIME) {
750 data->pwm_downtime = TIME_TO_REG(val);
751 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
752 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
753 data->pwm_downtime);
754 } else { /* SETUP_TEMP_CRITICAL */
755 data->temp_critical =
756 w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
757 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
758 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
759 data->temp_critical);
760 }
761
762 mutex_unlock(&data->update_lock);
763 return count;
764 }
765
766 /*
767 * Temp SmartFan control
768 * TEMP_FAN_MAP
769 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
770 * It's possible two or more temp channels control the same fan, w83793
771 * always prefers to pick the most critical request and applies it to
772 * the related Fan.
773 * It's possible one fan is not in any mapping of 6 temp channels, this
774 * means the fan is manual mode
775 *
776 * TEMP_PWM_ENABLE
777 * Each temp channel has its own SmartFan mode, and temp channel
778 * control fans that are set by TEMP_FAN_MAP
779 * 0: SmartFanII mode
780 * 1: Thermal Cruise Mode
781 *
782 * TEMP_CRUISE
783 * Target temperature in thermal cruise mode, w83793 will try to turn
784 * fan speed to keep the temperature of target device around this
785 * temperature.
786 *
787 * TEMP_TOLERANCE
788 * If Temp higher or lower than target with this tolerance, w83793
789 * will take actions to speed up or slow down the fan to keep the
790 * temperature within the tolerance range.
791 */
792
793 #define TEMP_FAN_MAP 0
794 #define TEMP_PWM_ENABLE 1
795 #define TEMP_CRUISE 2
796 #define TEMP_TOLERANCE 3
797 static ssize_t
798 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
799 {
800 struct sensor_device_attribute_2 *sensor_attr =
801 to_sensor_dev_attr_2(attr);
802 int nr = sensor_attr->nr;
803 int index = sensor_attr->index;
804 struct w83793_data *data = w83793_update_device(dev);
805 u32 val;
806
807 if (nr == TEMP_FAN_MAP) {
808 val = data->temp_fan_map[index];
809 } else if (nr == TEMP_PWM_ENABLE) {
810 /* +2 to transfrom into 2 and 3 to conform with sysfs intf */
811 val = ((data->pwm_enable >> index) & 0x01) + 2;
812 } else if (nr == TEMP_CRUISE) {
813 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
814 } else { /* TEMP_TOLERANCE */
815 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
816 val = TEMP_FROM_REG(val & 0x0f);
817 }
818 return sprintf(buf, "%d\n", val);
819 }
820
821 static ssize_t
822 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
823 const char *buf, size_t count)
824 {
825 struct sensor_device_attribute_2 *sensor_attr =
826 to_sensor_dev_attr_2(attr);
827 int nr = sensor_attr->nr;
828 int index = sensor_attr->index;
829 struct i2c_client *client = to_i2c_client(dev);
830 struct w83793_data *data = i2c_get_clientdata(client);
831 long val;
832 int err;
833
834 err = kstrtol(buf, 10, &val);
835 if (err)
836 return err;
837
838 mutex_lock(&data->update_lock);
839 if (nr == TEMP_FAN_MAP) {
840 val = SENSORS_LIMIT(val, 0, 255);
841 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
842 data->temp_fan_map[index] = val;
843 } else if (nr == TEMP_PWM_ENABLE) {
844 if (val == 2 || val == 3) {
845 data->pwm_enable =
846 w83793_read_value(client, W83793_REG_PWM_ENABLE);
847 if (val - 2)
848 data->pwm_enable |= 1 << index;
849 else
850 data->pwm_enable &= ~(1 << index);
851 w83793_write_value(client, W83793_REG_PWM_ENABLE,
852 data->pwm_enable);
853 } else {
854 mutex_unlock(&data->update_lock);
855 return -EINVAL;
856 }
857 } else if (nr == TEMP_CRUISE) {
858 data->temp_cruise[index] =
859 w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
860 data->temp_cruise[index] &= 0x80;
861 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
862
863 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
864 data->temp_cruise[index]);
865 } else { /* TEMP_TOLERANCE */
866 int i = index >> 1;
867 u8 shift = (index & 0x01) ? 4 : 0;
868 data->tolerance[i] =
869 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
870
871 data->tolerance[i] &= ~(0x0f << shift);
872 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
873 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
874 data->tolerance[i]);
875 }
876
877 mutex_unlock(&data->update_lock);
878 return count;
879 }
880
881 static ssize_t
882 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
883 {
884 struct sensor_device_attribute_2 *sensor_attr =
885 to_sensor_dev_attr_2(attr);
886 int nr = sensor_attr->nr;
887 int index = sensor_attr->index;
888 struct w83793_data *data = w83793_update_device(dev);
889
890 return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
891 }
892
893 static ssize_t
894 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
895 const char *buf, size_t count)
896 {
897 struct i2c_client *client = to_i2c_client(dev);
898 struct w83793_data *data = i2c_get_clientdata(client);
899 struct sensor_device_attribute_2 *sensor_attr =
900 to_sensor_dev_attr_2(attr);
901 int nr = sensor_attr->nr;
902 int index = sensor_attr->index;
903 unsigned long val;
904 int err;
905
906 err = kstrtoul(buf, 10, &val);
907 if (err)
908 return err;
909 val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
910
911 mutex_lock(&data->update_lock);
912 data->sf2_pwm[index][nr] =
913 w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
914 data->sf2_pwm[index][nr] |= val;
915 w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
916 data->sf2_pwm[index][nr]);
917 mutex_unlock(&data->update_lock);
918 return count;
919 }
920
921 static ssize_t
922 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
923 {
924 struct sensor_device_attribute_2 *sensor_attr =
925 to_sensor_dev_attr_2(attr);
926 int nr = sensor_attr->nr;
927 int index = sensor_attr->index;
928 struct w83793_data *data = w83793_update_device(dev);
929
930 return sprintf(buf, "%ld\n",
931 TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
932 }
933
934 static ssize_t
935 store_sf2_temp(struct device *dev, struct device_attribute *attr,
936 const char *buf, size_t count)
937 {
938 struct i2c_client *client = to_i2c_client(dev);
939 struct w83793_data *data = i2c_get_clientdata(client);
940 struct sensor_device_attribute_2 *sensor_attr =
941 to_sensor_dev_attr_2(attr);
942 int nr = sensor_attr->nr;
943 int index = sensor_attr->index;
944 long val;
945 int err;
946
947 err = kstrtol(buf, 10, &val);
948 if (err)
949 return err;
950 val = TEMP_TO_REG(val, 0, 0x7f);
951
952 mutex_lock(&data->update_lock);
953 data->sf2_temp[index][nr] =
954 w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
955 data->sf2_temp[index][nr] |= val;
956 w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
957 data->sf2_temp[index][nr]);
958 mutex_unlock(&data->update_lock);
959 return count;
960 }
961
962 /* only Vcore A/B and Vtt have additional 2 bits precision */
963 static ssize_t
964 show_in(struct device *dev, struct device_attribute *attr, char *buf)
965 {
966 struct sensor_device_attribute_2 *sensor_attr =
967 to_sensor_dev_attr_2(attr);
968 int nr = sensor_attr->nr;
969 int index = sensor_attr->index;
970 struct w83793_data *data = w83793_update_device(dev);
971 u16 val = data->in[index][nr];
972
973 if (index < 3) {
974 val <<= 2;
975 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
976 }
977 /* voltage inputs 5VDD and 5VSB needs 150mV offset */
978 val = val * scale_in[index] + scale_in_add[index];
979 return sprintf(buf, "%d\n", val);
980 }
981
982 static ssize_t
983 store_in(struct device *dev, struct device_attribute *attr,
984 const char *buf, size_t count)
985 {
986 struct sensor_device_attribute_2 *sensor_attr =
987 to_sensor_dev_attr_2(attr);
988 int nr = sensor_attr->nr;
989 int index = sensor_attr->index;
990 struct i2c_client *client = to_i2c_client(dev);
991 struct w83793_data *data = i2c_get_clientdata(client);
992 unsigned long val;
993 int err;
994
995 err = kstrtoul(buf, 10, &val);
996 if (err)
997 return err;
998 val = (val + scale_in[index] / 2) / scale_in[index];
999
1000 mutex_lock(&data->update_lock);
1001 if (index > 2) {
1002 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
1003 if (nr == 1 || nr == 2)
1004 val -= scale_in_add[index] / scale_in[index];
1005 val = SENSORS_LIMIT(val, 0, 255);
1006 } else {
1007 val = SENSORS_LIMIT(val, 0, 0x3FF);
1008 data->in_low_bits[nr] =
1009 w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1010 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1011 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1012 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1013 data->in_low_bits[nr]);
1014 val >>= 2;
1015 }
1016 data->in[index][nr] = val;
1017 w83793_write_value(client, W83793_REG_IN[index][nr],
1018 data->in[index][nr]);
1019 mutex_unlock(&data->update_lock);
1020 return count;
1021 }
1022
1023 #define NOT_USED -1
1024
1025 #define SENSOR_ATTR_IN(index) \
1026 SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \
1027 IN_READ, index), \
1028 SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \
1029 store_in, IN_MAX, index), \
1030 SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \
1031 store_in, IN_LOW, index), \
1032 SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \
1033 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \
1034 SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \
1035 show_alarm_beep, store_beep, BEEP_ENABLE, \
1036 index + ((index > 2) ? 1 : 0))
1037
1038 #define SENSOR_ATTR_FAN(index) \
1039 SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \
1040 NULL, ALARM_STATUS, index + 17), \
1041 SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \
1042 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \
1043 SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \
1044 NULL, FAN_INPUT, index - 1), \
1045 SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \
1046 show_fan, store_fan_min, FAN_MIN, index - 1)
1047
1048 #define SENSOR_ATTR_PWM(index) \
1049 SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \
1050 store_pwm, PWM_DUTY, index - 1), \
1051 SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \
1052 show_pwm, store_pwm, PWM_NONSTOP, index - 1), \
1053 SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \
1054 show_pwm, store_pwm, PWM_START, index - 1), \
1055 SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \
1056 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1057
1058 #define SENSOR_ATTR_TEMP(index) \
1059 SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \
1060 show_temp_mode, store_temp_mode, NOT_USED, index - 1), \
1061 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \
1062 NULL, TEMP_READ, index - 1), \
1063 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \
1064 store_temp, TEMP_CRIT, index - 1), \
1065 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
1066 show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \
1067 SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1068 store_temp, TEMP_WARN, index - 1), \
1069 SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \
1070 show_temp, store_temp, TEMP_WARN_HYST, index - 1), \
1071 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
1072 show_alarm_beep, NULL, ALARM_STATUS, index + 11), \
1073 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
1074 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \
1075 SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \
1076 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \
1077 TEMP_FAN_MAP, index - 1), \
1078 SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
1079 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \
1080 index - 1), \
1081 SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \
1082 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \
1083 SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1084 store_sf_ctrl, TEMP_TOLERANCE, index - 1), \
1085 SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1086 show_sf2_pwm, store_sf2_pwm, 0, index - 1), \
1087 SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1088 show_sf2_pwm, store_sf2_pwm, 1, index - 1), \
1089 SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1090 show_sf2_pwm, store_sf2_pwm, 2, index - 1), \
1091 SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1092 show_sf2_pwm, store_sf2_pwm, 3, index - 1), \
1093 SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1094 show_sf2_pwm, store_sf2_pwm, 4, index - 1), \
1095 SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1096 show_sf2_pwm, store_sf2_pwm, 5, index - 1), \
1097 SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1098 show_sf2_pwm, store_sf2_pwm, 6, index - 1), \
1099 SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1100 show_sf2_temp, store_sf2_temp, 0, index - 1), \
1101 SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1102 show_sf2_temp, store_sf2_temp, 1, index - 1), \
1103 SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1104 show_sf2_temp, store_sf2_temp, 2, index - 1), \
1105 SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1106 show_sf2_temp, store_sf2_temp, 3, index - 1), \
1107 SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1108 show_sf2_temp, store_sf2_temp, 4, index - 1), \
1109 SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1110 show_sf2_temp, store_sf2_temp, 5, index - 1), \
1111 SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1112 show_sf2_temp, store_sf2_temp, 6, index - 1)
1113
1114 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1115 SENSOR_ATTR_IN(0),
1116 SENSOR_ATTR_IN(1),
1117 SENSOR_ATTR_IN(2),
1118 SENSOR_ATTR_IN(3),
1119 SENSOR_ATTR_IN(4),
1120 SENSOR_ATTR_IN(5),
1121 SENSOR_ATTR_IN(6),
1122 SENSOR_ATTR_IN(7),
1123 SENSOR_ATTR_IN(8),
1124 SENSOR_ATTR_IN(9),
1125 SENSOR_ATTR_FAN(1),
1126 SENSOR_ATTR_FAN(2),
1127 SENSOR_ATTR_FAN(3),
1128 SENSOR_ATTR_FAN(4),
1129 SENSOR_ATTR_FAN(5),
1130 SENSOR_ATTR_PWM(1),
1131 SENSOR_ATTR_PWM(2),
1132 SENSOR_ATTR_PWM(3),
1133 };
1134
1135 static struct sensor_device_attribute_2 w83793_temp[] = {
1136 SENSOR_ATTR_TEMP(1),
1137 SENSOR_ATTR_TEMP(2),
1138 SENSOR_ATTR_TEMP(3),
1139 SENSOR_ATTR_TEMP(4),
1140 SENSOR_ATTR_TEMP(5),
1141 SENSOR_ATTR_TEMP(6),
1142 };
1143
1144 /* Fan6-Fan12 */
1145 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1146 SENSOR_ATTR_FAN(6),
1147 SENSOR_ATTR_FAN(7),
1148 SENSOR_ATTR_FAN(8),
1149 SENSOR_ATTR_FAN(9),
1150 SENSOR_ATTR_FAN(10),
1151 SENSOR_ATTR_FAN(11),
1152 SENSOR_ATTR_FAN(12),
1153 };
1154
1155 /* Pwm4-Pwm8 */
1156 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1157 SENSOR_ATTR_PWM(4),
1158 SENSOR_ATTR_PWM(5),
1159 SENSOR_ATTR_PWM(6),
1160 SENSOR_ATTR_PWM(7),
1161 SENSOR_ATTR_PWM(8),
1162 };
1163
1164 static struct sensor_device_attribute_2 w83793_vid[] = {
1165 SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1166 SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1167 };
1168 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
1169
1170 static struct sensor_device_attribute_2 sda_single_files[] = {
1171 SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1172 store_chassis_clear, ALARM_STATUS, 30),
1173 SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1174 store_beep_enable, NOT_USED, NOT_USED),
1175 SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1176 store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1177 SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1178 store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1179 SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1180 store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1181 SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1182 store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1183 };
1184
1185 static void w83793_init_client(struct i2c_client *client)
1186 {
1187 if (reset)
1188 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1189
1190 /* Start monitoring */
1191 w83793_write_value(client, W83793_REG_CONFIG,
1192 w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1193 }
1194
1195 /*
1196 * Watchdog routines
1197 */
1198
1199 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1200 {
1201 int ret, mtimeout;
1202
1203 mtimeout = DIV_ROUND_UP(timeout, 60);
1204
1205 if (mtimeout > 255)
1206 return -EINVAL;
1207
1208 mutex_lock(&data->watchdog_lock);
1209 if (!data->client) {
1210 ret = -ENODEV;
1211 goto leave;
1212 }
1213
1214 data->watchdog_timeout = mtimeout;
1215
1216 /* Set Timeout value (in Minutes) */
1217 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1218 data->watchdog_timeout);
1219
1220 ret = mtimeout * 60;
1221
1222 leave:
1223 mutex_unlock(&data->watchdog_lock);
1224 return ret;
1225 }
1226
1227 static int watchdog_get_timeout(struct w83793_data *data)
1228 {
1229 int timeout;
1230
1231 mutex_lock(&data->watchdog_lock);
1232 timeout = data->watchdog_timeout * 60;
1233 mutex_unlock(&data->watchdog_lock);
1234
1235 return timeout;
1236 }
1237
1238 static int watchdog_trigger(struct w83793_data *data)
1239 {
1240 int ret = 0;
1241
1242 mutex_lock(&data->watchdog_lock);
1243 if (!data->client) {
1244 ret = -ENODEV;
1245 goto leave;
1246 }
1247
1248 /* Set Timeout value (in Minutes) */
1249 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1250 data->watchdog_timeout);
1251
1252 leave:
1253 mutex_unlock(&data->watchdog_lock);
1254 return ret;
1255 }
1256
1257 static int watchdog_enable(struct w83793_data *data)
1258 {
1259 int ret = 0;
1260
1261 mutex_lock(&data->watchdog_lock);
1262 if (!data->client) {
1263 ret = -ENODEV;
1264 goto leave;
1265 }
1266
1267 /* Set initial timeout */
1268 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1269 data->watchdog_timeout);
1270
1271 /* Enable Soft Watchdog */
1272 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1273
1274 leave:
1275 mutex_unlock(&data->watchdog_lock);
1276 return ret;
1277 }
1278
1279 static int watchdog_disable(struct w83793_data *data)
1280 {
1281 int ret = 0;
1282
1283 mutex_lock(&data->watchdog_lock);
1284 if (!data->client) {
1285 ret = -ENODEV;
1286 goto leave;
1287 }
1288
1289 /* Disable Soft Watchdog */
1290 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1291
1292 leave:
1293 mutex_unlock(&data->watchdog_lock);
1294 return ret;
1295 }
1296
1297 static int watchdog_open(struct inode *inode, struct file *filp)
1298 {
1299 struct w83793_data *pos, *data = NULL;
1300 int watchdog_is_open;
1301
1302 /*
1303 * We get called from drivers/char/misc.c with misc_mtx hold, and we
1304 * call misc_register() from w83793_probe() with watchdog_data_mutex
1305 * hold, as misc_register() takes the misc_mtx lock, this is a possible
1306 * deadlock, so we use mutex_trylock here.
1307 */
1308 if (!mutex_trylock(&watchdog_data_mutex))
1309 return -ERESTARTSYS;
1310 list_for_each_entry(pos, &watchdog_data_list, list) {
1311 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1312 data = pos;
1313 break;
1314 }
1315 }
1316
1317 /* Check, if device is already open */
1318 watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1319
1320 /*
1321 * Increase data reference counter (if not already done).
1322 * Note we can never not have found data, so we don't check for this
1323 */
1324 if (!watchdog_is_open)
1325 kref_get(&data->kref);
1326
1327 mutex_unlock(&watchdog_data_mutex);
1328
1329 /* Check, if device is already open and possibly issue error */
1330 if (watchdog_is_open)
1331 return -EBUSY;
1332
1333 /* Enable Soft Watchdog */
1334 watchdog_enable(data);
1335
1336 /* Store pointer to data into filp's private data */
1337 filp->private_data = data;
1338
1339 return nonseekable_open(inode, filp);
1340 }
1341
1342 static int watchdog_close(struct inode *inode, struct file *filp)
1343 {
1344 struct w83793_data *data = filp->private_data;
1345
1346 if (data->watchdog_expect_close) {
1347 watchdog_disable(data);
1348 data->watchdog_expect_close = 0;
1349 } else {
1350 watchdog_trigger(data);
1351 dev_crit(&data->client->dev,
1352 "unexpected close, not stopping watchdog!\n");
1353 }
1354
1355 clear_bit(0, &data->watchdog_is_open);
1356
1357 /* Decrease data reference counter */
1358 mutex_lock(&watchdog_data_mutex);
1359 kref_put(&data->kref, w83793_release_resources);
1360 mutex_unlock(&watchdog_data_mutex);
1361
1362 return 0;
1363 }
1364
1365 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1366 size_t count, loff_t *offset)
1367 {
1368 ssize_t ret;
1369 struct w83793_data *data = filp->private_data;
1370
1371 if (count) {
1372 if (!nowayout) {
1373 size_t i;
1374
1375 /* Clear it in case it was set with a previous write */
1376 data->watchdog_expect_close = 0;
1377
1378 for (i = 0; i != count; i++) {
1379 char c;
1380 if (get_user(c, buf + i))
1381 return -EFAULT;
1382 if (c == 'V')
1383 data->watchdog_expect_close = 1;
1384 }
1385 }
1386 ret = watchdog_trigger(data);
1387 if (ret < 0)
1388 return ret;
1389 }
1390 return count;
1391 }
1392
1393 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1394 unsigned long arg)
1395 {
1396 struct watchdog_info ident = {
1397 .options = WDIOF_KEEPALIVEPING |
1398 WDIOF_SETTIMEOUT |
1399 WDIOF_CARDRESET,
1400 .identity = "w83793 watchdog"
1401 };
1402
1403 int val, ret = 0;
1404 struct w83793_data *data = filp->private_data;
1405
1406 switch (cmd) {
1407 case WDIOC_GETSUPPORT:
1408 if (!nowayout)
1409 ident.options |= WDIOF_MAGICCLOSE;
1410 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1411 ret = -EFAULT;
1412 break;
1413
1414 case WDIOC_GETSTATUS:
1415 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1416 ret = put_user(val, (int __user *)arg);
1417 break;
1418
1419 case WDIOC_GETBOOTSTATUS:
1420 ret = put_user(0, (int __user *)arg);
1421 break;
1422
1423 case WDIOC_KEEPALIVE:
1424 ret = watchdog_trigger(data);
1425 break;
1426
1427 case WDIOC_GETTIMEOUT:
1428 val = watchdog_get_timeout(data);
1429 ret = put_user(val, (int __user *)arg);
1430 break;
1431
1432 case WDIOC_SETTIMEOUT:
1433 if (get_user(val, (int __user *)arg)) {
1434 ret = -EFAULT;
1435 break;
1436 }
1437 ret = watchdog_set_timeout(data, val);
1438 if (ret > 0)
1439 ret = put_user(ret, (int __user *)arg);
1440 break;
1441
1442 case WDIOC_SETOPTIONS:
1443 if (get_user(val, (int __user *)arg)) {
1444 ret = -EFAULT;
1445 break;
1446 }
1447
1448 if (val & WDIOS_DISABLECARD)
1449 ret = watchdog_disable(data);
1450 else if (val & WDIOS_ENABLECARD)
1451 ret = watchdog_enable(data);
1452 else
1453 ret = -EINVAL;
1454
1455 break;
1456 default:
1457 ret = -ENOTTY;
1458 }
1459 return ret;
1460 }
1461
1462 static const struct file_operations watchdog_fops = {
1463 .owner = THIS_MODULE,
1464 .llseek = no_llseek,
1465 .open = watchdog_open,
1466 .release = watchdog_close,
1467 .write = watchdog_write,
1468 .unlocked_ioctl = watchdog_ioctl,
1469 };
1470
1471 /*
1472 * Notifier for system down
1473 */
1474
1475 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1476 void *unused)
1477 {
1478 struct w83793_data *data = NULL;
1479
1480 if (code == SYS_DOWN || code == SYS_HALT) {
1481
1482 /* Disable each registered watchdog */
1483 mutex_lock(&watchdog_data_mutex);
1484 list_for_each_entry(data, &watchdog_data_list, list) {
1485 if (data->watchdog_miscdev.minor)
1486 watchdog_disable(data);
1487 }
1488 mutex_unlock(&watchdog_data_mutex);
1489 }
1490
1491 return NOTIFY_DONE;
1492 }
1493
1494 /*
1495 * The WDT needs to learn about soft shutdowns in order to
1496 * turn the timebomb registers off.
1497 */
1498
1499 static struct notifier_block watchdog_notifier = {
1500 .notifier_call = watchdog_notify_sys,
1501 };
1502
1503 /*
1504 * Init / remove routines
1505 */
1506
1507 static int w83793_remove(struct i2c_client *client)
1508 {
1509 struct w83793_data *data = i2c_get_clientdata(client);
1510 struct device *dev = &client->dev;
1511 int i, tmp;
1512
1513 /* Unregister the watchdog (if registered) */
1514 if (data->watchdog_miscdev.minor) {
1515 misc_deregister(&data->watchdog_miscdev);
1516
1517 if (data->watchdog_is_open) {
1518 dev_warn(&client->dev,
1519 "i2c client detached with watchdog open! "
1520 "Stopping watchdog.\n");
1521 watchdog_disable(data);
1522 }
1523
1524 mutex_lock(&watchdog_data_mutex);
1525 list_del(&data->list);
1526 mutex_unlock(&watchdog_data_mutex);
1527
1528 /* Tell the watchdog code the client is gone */
1529 mutex_lock(&data->watchdog_lock);
1530 data->client = NULL;
1531 mutex_unlock(&data->watchdog_lock);
1532 }
1533
1534 /* Reset Configuration Register to Disable Watch Dog Registers */
1535 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1536 w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1537
1538 unregister_reboot_notifier(&watchdog_notifier);
1539
1540 hwmon_device_unregister(data->hwmon_dev);
1541
1542 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1543 device_remove_file(dev,
1544 &w83793_sensor_attr_2[i].dev_attr);
1545
1546 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1547 device_remove_file(dev, &sda_single_files[i].dev_attr);
1548
1549 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1550 device_remove_file(dev, &w83793_vid[i].dev_attr);
1551 device_remove_file(dev, &dev_attr_vrm);
1552
1553 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1554 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1555
1556 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1557 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1558
1559 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1560 device_remove_file(dev, &w83793_temp[i].dev_attr);
1561
1562 if (data->lm75[0] != NULL)
1563 i2c_unregister_device(data->lm75[0]);
1564 if (data->lm75[1] != NULL)
1565 i2c_unregister_device(data->lm75[1]);
1566
1567 /* Decrease data reference counter */
1568 mutex_lock(&watchdog_data_mutex);
1569 kref_put(&data->kref, w83793_release_resources);
1570 mutex_unlock(&watchdog_data_mutex);
1571
1572 return 0;
1573 }
1574
1575 static int
1576 w83793_detect_subclients(struct i2c_client *client)
1577 {
1578 int i, id, err;
1579 int address = client->addr;
1580 u8 tmp;
1581 struct i2c_adapter *adapter = client->adapter;
1582 struct w83793_data *data = i2c_get_clientdata(client);
1583
1584 id = i2c_adapter_id(adapter);
1585 if (force_subclients[0] == id && force_subclients[1] == address) {
1586 for (i = 2; i <= 3; i++) {
1587 if (force_subclients[i] < 0x48
1588 || force_subclients[i] > 0x4f) {
1589 dev_err(&client->dev,
1590 "invalid subclient "
1591 "address %d; must be 0x48-0x4f\n",
1592 force_subclients[i]);
1593 err = -EINVAL;
1594 goto ERROR_SC_0;
1595 }
1596 }
1597 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1598 (force_subclients[2] & 0x07) |
1599 ((force_subclients[3] & 0x07) << 4));
1600 }
1601
1602 tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1603 if (!(tmp & 0x08))
1604 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1605 if (!(tmp & 0x80)) {
1606 if ((data->lm75[0] != NULL)
1607 && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1608 dev_err(&client->dev,
1609 "duplicate addresses 0x%x, "
1610 "use force_subclients\n", data->lm75[0]->addr);
1611 err = -ENODEV;
1612 goto ERROR_SC_1;
1613 }
1614 data->lm75[1] = i2c_new_dummy(adapter,
1615 0x48 + ((tmp >> 4) & 0x7));
1616 }
1617
1618 return 0;
1619
1620 /* Undo inits in case of errors */
1621
1622 ERROR_SC_1:
1623 if (data->lm75[0] != NULL)
1624 i2c_unregister_device(data->lm75[0]);
1625 ERROR_SC_0:
1626 return err;
1627 }
1628
1629 /* Return 0 if detection is successful, -ENODEV otherwise */
1630 static int w83793_detect(struct i2c_client *client,
1631 struct i2c_board_info *info)
1632 {
1633 u8 tmp, bank, chip_id;
1634 struct i2c_adapter *adapter = client->adapter;
1635 unsigned short address = client->addr;
1636
1637 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1638 return -ENODEV;
1639
1640 bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1641
1642 tmp = bank & 0x80 ? 0x5c : 0xa3;
1643 /* Check Winbond vendor ID */
1644 if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1645 pr_debug("w83793: Detection failed at check vendor id\n");
1646 return -ENODEV;
1647 }
1648
1649 /*
1650 * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1651 * should match
1652 */
1653 if ((bank & 0x07) == 0
1654 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1655 (address << 1)) {
1656 pr_debug("w83793: Detection failed at check i2c addr\n");
1657 return -ENODEV;
1658 }
1659
1660 /* Determine the chip type now */
1661 chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1662 if (chip_id != 0x7b)
1663 return -ENODEV;
1664
1665 strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1666
1667 return 0;
1668 }
1669
1670 static int w83793_probe(struct i2c_client *client,
1671 const struct i2c_device_id *id)
1672 {
1673 struct device *dev = &client->dev;
1674 const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1675 struct w83793_data *data;
1676 int i, tmp, val, err;
1677 int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1678 int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1679 int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1680
1681 data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1682 if (!data) {
1683 err = -ENOMEM;
1684 goto exit;
1685 }
1686
1687 i2c_set_clientdata(client, data);
1688 data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1689 mutex_init(&data->update_lock);
1690 mutex_init(&data->watchdog_lock);
1691 INIT_LIST_HEAD(&data->list);
1692 kref_init(&data->kref);
1693
1694 /*
1695 * Store client pointer in our data struct for watchdog usage
1696 * (where the client is found through a data ptr instead of the
1697 * otherway around)
1698 */
1699 data->client = client;
1700
1701 err = w83793_detect_subclients(client);
1702 if (err)
1703 goto free_mem;
1704
1705 /* Initialize the chip */
1706 w83793_init_client(client);
1707
1708 /*
1709 * Only fan 1-5 has their own input pins,
1710 * Pwm 1-3 has their own pins
1711 */
1712 data->has_fan = 0x1f;
1713 data->has_pwm = 0x07;
1714 tmp = w83793_read_value(client, W83793_REG_MFC);
1715 val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1716
1717 /* check the function of pins 49-56 */
1718 if (tmp & 0x80) {
1719 data->has_vid |= 0x2; /* has VIDB */
1720 } else {
1721 data->has_pwm |= 0x18; /* pwm 4,5 */
1722 if (val & 0x01) { /* fan 6 */
1723 data->has_fan |= 0x20;
1724 data->has_pwm |= 0x20;
1725 }
1726 if (val & 0x02) { /* fan 7 */
1727 data->has_fan |= 0x40;
1728 data->has_pwm |= 0x40;
1729 }
1730 if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */
1731 data->has_fan |= 0x80;
1732 data->has_pwm |= 0x80;
1733 }
1734 }
1735
1736 /* check the function of pins 37-40 */
1737 if (!(tmp & 0x29))
1738 data->has_vid |= 0x1; /* has VIDA */
1739 if (0x08 == (tmp & 0x0c)) {
1740 if (val & 0x08) /* fan 9 */
1741 data->has_fan |= 0x100;
1742 if (val & 0x10) /* fan 10 */
1743 data->has_fan |= 0x200;
1744 }
1745 if (0x20 == (tmp & 0x30)) {
1746 if (val & 0x20) /* fan 11 */
1747 data->has_fan |= 0x400;
1748 if (val & 0x40) /* fan 12 */
1749 data->has_fan |= 0x800;
1750 }
1751
1752 if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */
1753 data->has_fan |= 0x80;
1754 data->has_pwm |= 0x80;
1755 }
1756
1757 tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1758 if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */
1759 data->has_fan |= 0x100;
1760 }
1761 if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */
1762 data->has_fan |= 0x200;
1763 }
1764 if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */
1765 data->has_fan |= 0x400;
1766 }
1767 if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */
1768 data->has_fan |= 0x800;
1769 }
1770
1771 /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1772 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1773 if (tmp & 0x01)
1774 data->has_temp |= 0x01;
1775 if (tmp & 0x04)
1776 data->has_temp |= 0x02;
1777 if (tmp & 0x10)
1778 data->has_temp |= 0x04;
1779 if (tmp & 0x40)
1780 data->has_temp |= 0x08;
1781
1782 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1783 if (tmp & 0x01)
1784 data->has_temp |= 0x10;
1785 if (tmp & 0x02)
1786 data->has_temp |= 0x20;
1787
1788 /* Register sysfs hooks */
1789 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1790 err = device_create_file(dev,
1791 &w83793_sensor_attr_2[i].dev_attr);
1792 if (err)
1793 goto exit_remove;
1794 }
1795
1796 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1797 if (!(data->has_vid & (1 << i)))
1798 continue;
1799 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1800 if (err)
1801 goto exit_remove;
1802 }
1803 if (data->has_vid) {
1804 data->vrm = vid_which_vrm();
1805 err = device_create_file(dev, &dev_attr_vrm);
1806 if (err)
1807 goto exit_remove;
1808 }
1809
1810 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1811 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1812 if (err)
1813 goto exit_remove;
1814
1815 }
1816
1817 for (i = 0; i < 6; i++) {
1818 int j;
1819 if (!(data->has_temp & (1 << i)))
1820 continue;
1821 for (j = 0; j < files_temp; j++) {
1822 err = device_create_file(dev,
1823 &w83793_temp[(i) * files_temp
1824 + j].dev_attr);
1825 if (err)
1826 goto exit_remove;
1827 }
1828 }
1829
1830 for (i = 5; i < 12; i++) {
1831 int j;
1832 if (!(data->has_fan & (1 << i)))
1833 continue;
1834 for (j = 0; j < files_fan; j++) {
1835 err = device_create_file(dev,
1836 &w83793_left_fan[(i - 5) * files_fan
1837 + j].dev_attr);
1838 if (err)
1839 goto exit_remove;
1840 }
1841 }
1842
1843 for (i = 3; i < 8; i++) {
1844 int j;
1845 if (!(data->has_pwm & (1 << i)))
1846 continue;
1847 for (j = 0; j < files_pwm; j++) {
1848 err = device_create_file(dev,
1849 &w83793_left_pwm[(i - 3) * files_pwm
1850 + j].dev_attr);
1851 if (err)
1852 goto exit_remove;
1853 }
1854 }
1855
1856 data->hwmon_dev = hwmon_device_register(dev);
1857 if (IS_ERR(data->hwmon_dev)) {
1858 err = PTR_ERR(data->hwmon_dev);
1859 goto exit_remove;
1860 }
1861
1862 /* Watchdog initialization */
1863
1864 /* Register boot notifier */
1865 err = register_reboot_notifier(&watchdog_notifier);
1866 if (err != 0) {
1867 dev_err(&client->dev,
1868 "cannot register reboot notifier (err=%d)\n", err);
1869 goto exit_devunreg;
1870 }
1871
1872 /*
1873 * Enable Watchdog registers.
1874 * Set Configuration Register to Enable Watch Dog Registers
1875 * (Bit 2) = XXXX, X1XX.
1876 */
1877 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1878 w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1879
1880 /* Set the default watchdog timeout */
1881 data->watchdog_timeout = timeout;
1882
1883 /* Check, if last reboot was caused by watchdog */
1884 data->watchdog_caused_reboot =
1885 w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1886
1887 /* Disable Soft Watchdog during initialiation */
1888 watchdog_disable(data);
1889
1890 /*
1891 * We take the data_mutex lock early so that watchdog_open() cannot
1892 * run when misc_register() has completed, but we've not yet added
1893 * our data to the watchdog_data_list (and set the default timeout)
1894 */
1895 mutex_lock(&watchdog_data_mutex);
1896 for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1897 /* Register our watchdog part */
1898 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1899 "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1900 data->watchdog_miscdev.name = data->watchdog_name;
1901 data->watchdog_miscdev.fops = &watchdog_fops;
1902 data->watchdog_miscdev.minor = watchdog_minors[i];
1903
1904 err = misc_register(&data->watchdog_miscdev);
1905 if (err == -EBUSY)
1906 continue;
1907 if (err) {
1908 data->watchdog_miscdev.minor = 0;
1909 dev_err(&client->dev,
1910 "Registering watchdog chardev: %d\n", err);
1911 break;
1912 }
1913
1914 list_add(&data->list, &watchdog_data_list);
1915
1916 dev_info(&client->dev,
1917 "Registered watchdog chardev major 10, minor: %d\n",
1918 watchdog_minors[i]);
1919 break;
1920 }
1921 if (i == ARRAY_SIZE(watchdog_minors)) {
1922 data->watchdog_miscdev.minor = 0;
1923 dev_warn(&client->dev, "Couldn't register watchdog chardev "
1924 "(due to no free minor)\n");
1925 }
1926
1927 mutex_unlock(&watchdog_data_mutex);
1928
1929 return 0;
1930
1931 /* Unregister hwmon device */
1932
1933 exit_devunreg:
1934
1935 hwmon_device_unregister(data->hwmon_dev);
1936
1937 /* Unregister sysfs hooks */
1938
1939 exit_remove:
1940 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1941 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1942
1943 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1944 device_remove_file(dev, &sda_single_files[i].dev_attr);
1945
1946 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1947 device_remove_file(dev, &w83793_vid[i].dev_attr);
1948
1949 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1950 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1951
1952 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1953 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1954
1955 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1956 device_remove_file(dev, &w83793_temp[i].dev_attr);
1957
1958 if (data->lm75[0] != NULL)
1959 i2c_unregister_device(data->lm75[0]);
1960 if (data->lm75[1] != NULL)
1961 i2c_unregister_device(data->lm75[1]);
1962 free_mem:
1963 kfree(data);
1964 exit:
1965 return err;
1966 }
1967
1968 static void w83793_update_nonvolatile(struct device *dev)
1969 {
1970 struct i2c_client *client = to_i2c_client(dev);
1971 struct w83793_data *data = i2c_get_clientdata(client);
1972 int i, j;
1973 /*
1974 * They are somewhat "stable" registers, and to update them every time
1975 * takes so much time, it's just not worthy. Update them in a long
1976 * interval to avoid exception.
1977 */
1978 if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1979 || !data->valid))
1980 return;
1981 /* update voltage limits */
1982 for (i = 1; i < 3; i++) {
1983 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1984 data->in[j][i] =
1985 w83793_read_value(client, W83793_REG_IN[j][i]);
1986 }
1987 data->in_low_bits[i] =
1988 w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1989 }
1990
1991 for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1992 /* Update the Fan measured value and limits */
1993 if (!(data->has_fan & (1 << i)))
1994 continue;
1995 data->fan_min[i] =
1996 w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1997 data->fan_min[i] |=
1998 w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1999 }
2000
2001 for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
2002 if (!(data->has_temp & (1 << i)))
2003 continue;
2004 data->temp_fan_map[i] =
2005 w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
2006 for (j = 1; j < 5; j++) {
2007 data->temp[i][j] =
2008 w83793_read_value(client, W83793_REG_TEMP[i][j]);
2009 }
2010 data->temp_cruise[i] =
2011 w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2012 for (j = 0; j < 7; j++) {
2013 data->sf2_pwm[i][j] =
2014 w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2015 data->sf2_temp[i][j] =
2016 w83793_read_value(client,
2017 W83793_REG_SF2_TEMP(i, j));
2018 }
2019 }
2020
2021 for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2022 data->temp_mode[i] =
2023 w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2024
2025 for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2026 data->tolerance[i] =
2027 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2028 }
2029
2030 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2031 if (!(data->has_pwm & (1 << i)))
2032 continue;
2033 data->pwm[i][PWM_NONSTOP] =
2034 w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2035 data->pwm[i][PWM_START] =
2036 w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2037 data->pwm_stop_time[i] =
2038 w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2039 }
2040
2041 data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2042 data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2043 data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2044 data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2045 data->temp_critical =
2046 w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2047 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2048
2049 for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2050 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2051
2052 data->last_nonvolatile = jiffies;
2053 }
2054
2055 static struct w83793_data *w83793_update_device(struct device *dev)
2056 {
2057 struct i2c_client *client = to_i2c_client(dev);
2058 struct w83793_data *data = i2c_get_clientdata(client);
2059 int i;
2060
2061 mutex_lock(&data->update_lock);
2062
2063 if (!(time_after(jiffies, data->last_updated + HZ * 2)
2064 || !data->valid))
2065 goto END;
2066
2067 /* Update the voltages measured value and limits */
2068 for (i = 0; i < ARRAY_SIZE(data->in); i++)
2069 data->in[i][IN_READ] =
2070 w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2071
2072 data->in_low_bits[IN_READ] =
2073 w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2074
2075 for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2076 if (!(data->has_fan & (1 << i)))
2077 continue;
2078 data->fan[i] =
2079 w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2080 data->fan[i] |=
2081 w83793_read_value(client, W83793_REG_FAN(i) + 1);
2082 }
2083
2084 for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2085 if (!(data->has_temp & (1 << i)))
2086 continue;
2087 data->temp[i][TEMP_READ] =
2088 w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2089 }
2090
2091 data->temp_low_bits =
2092 w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2093
2094 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2095 if (data->has_pwm & (1 << i))
2096 data->pwm[i][PWM_DUTY] =
2097 w83793_read_value(client,
2098 W83793_REG_PWM(i, PWM_DUTY));
2099 }
2100
2101 for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2102 data->alarms[i] =
2103 w83793_read_value(client, W83793_REG_ALARM(i));
2104 if (data->has_vid & 0x01)
2105 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2106 if (data->has_vid & 0x02)
2107 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2108 w83793_update_nonvolatile(dev);
2109 data->last_updated = jiffies;
2110 data->valid = 1;
2111
2112 END:
2113 mutex_unlock(&data->update_lock);
2114 return data;
2115 }
2116
2117 /*
2118 * Ignore the possibility that somebody change bank outside the driver
2119 * Must be called with data->update_lock held, except during initialization
2120 */
2121 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2122 {
2123 struct w83793_data *data = i2c_get_clientdata(client);
2124 u8 res = 0xff;
2125 u8 new_bank = reg >> 8;
2126
2127 new_bank |= data->bank & 0xfc;
2128 if (data->bank != new_bank) {
2129 if (i2c_smbus_write_byte_data
2130 (client, W83793_REG_BANKSEL, new_bank) >= 0)
2131 data->bank = new_bank;
2132 else {
2133 dev_err(&client->dev,
2134 "set bank to %d failed, fall back "
2135 "to bank %d, read reg 0x%x error\n",
2136 new_bank, data->bank, reg);
2137 res = 0x0; /* read 0x0 from the chip */
2138 goto END;
2139 }
2140 }
2141 res = i2c_smbus_read_byte_data(client, reg & 0xff);
2142 END:
2143 return res;
2144 }
2145
2146 /* Must be called with data->update_lock held, except during initialization */
2147 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2148 {
2149 struct w83793_data *data = i2c_get_clientdata(client);
2150 int res;
2151 u8 new_bank = reg >> 8;
2152
2153 new_bank |= data->bank & 0xfc;
2154 if (data->bank != new_bank) {
2155 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2156 new_bank);
2157 if (res < 0) {
2158 dev_err(&client->dev,
2159 "set bank to %d failed, fall back "
2160 "to bank %d, write reg 0x%x error\n",
2161 new_bank, data->bank, reg);
2162 goto END;
2163 }
2164 data->bank = new_bank;
2165 }
2166
2167 res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2168 END:
2169 return res;
2170 }
2171
2172 module_i2c_driver(w83793_driver);
2173
2174 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2175 MODULE_DESCRIPTION("w83793 driver");
2176 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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