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cgroup_freezer: prepare freezer_change_state() for full hierarchy support
[linux-2.6/libata-dev.git] / drivers / hwmon / w83793.c
blob99799fd1d917ce5a451f6a14cbf2c6da72f6a2e6
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, "List of subclient addresses: "
63 "{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
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
190 static inline u16 FAN_TO_REG(long rpm)
191 {
192 if (rpm <= 0)
193 return 0x0fff;
194 return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
195 }
196
197 static inline unsigned long TIME_FROM_REG(u8 reg)
198 {
199 return reg * 100;
200 }
201
202 static inline u8 TIME_TO_REG(unsigned long val)
203 {
204 return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
205 }
206
207 static inline long TEMP_FROM_REG(s8 reg)
208 {
209 return reg * 1000;
210 }
211
212 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
213 {
214 return SENSORS_LIMIT((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 */
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
327 show_vrm(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
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
345 store_vrm(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 data->vrm = val;
357 return count;
358 }
359
360 #define ALARM_STATUS 0
361 #define BEEP_ENABLE 1
362 static ssize_t
363 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
364 {
365 struct w83793_data *data = w83793_update_device(dev);
366 struct sensor_device_attribute_2 *sensor_attr =
367 to_sensor_dev_attr_2(attr);
368 int nr = sensor_attr->nr;
369 int index = sensor_attr->index >> 3;
370 int bit = sensor_attr->index & 0x07;
371 u8 val;
372
373 if (nr == ALARM_STATUS) {
374 val = (data->alarms[index] >> (bit)) & 1;
375 } else { /* BEEP_ENABLE */
376 val = (data->beeps[index] >> (bit)) & 1;
377 }
378
379 return sprintf(buf, "%u\n", val);
380 }
381
382 static ssize_t
383 store_beep(struct device *dev, struct device_attribute *attr,
384 const char *buf, size_t count)
385 {
386 struct i2c_client *client = to_i2c_client(dev);
387 struct w83793_data *data = i2c_get_clientdata(client);
388 struct sensor_device_attribute_2 *sensor_attr =
389 to_sensor_dev_attr_2(attr);
390 int index = sensor_attr->index >> 3;
391 int shift = sensor_attr->index & 0x07;
392 u8 beep_bit = 1 << shift;
393 unsigned long val;
394 int err;
395
396 err = kstrtoul(buf, 10, &val);
397 if (err)
398 return err;
399
400 if (val > 1)
401 return -EINVAL;
402
403 mutex_lock(&data->update_lock);
404 data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
405 data->beeps[index] &= ~beep_bit;
406 data->beeps[index] |= val << shift;
407 w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
408 mutex_unlock(&data->update_lock);
409
410 return count;
411 }
412
413 static ssize_t
414 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
415 {
416 struct w83793_data *data = w83793_update_device(dev);
417 return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
418 }
419
420 static ssize_t
421 store_beep_enable(struct device *dev, struct device_attribute *attr,
422 const char *buf, size_t count)
423 {
424 struct i2c_client *client = to_i2c_client(dev);
425 struct w83793_data *data = i2c_get_clientdata(client);
426 unsigned long val;
427 int err;
428
429 err = kstrtoul(buf, 10, &val);
430 if (err)
431 return err;
432
433 if (val > 1)
434 return -EINVAL;
435
436 mutex_lock(&data->update_lock);
437 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
438 & 0xfd;
439 data->beep_enable |= val << 1;
440 w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
441 mutex_unlock(&data->update_lock);
442
443 return count;
444 }
445
446 /* Write 0 to clear chassis alarm */
447 static ssize_t
448 store_chassis_clear(struct device *dev,
449 struct device_attribute *attr, const char *buf,
450 size_t count)
451 {
452 struct i2c_client *client = to_i2c_client(dev);
453 struct w83793_data *data = i2c_get_clientdata(client);
454 unsigned long val;
455 u8 reg;
456 int err;
457
458 err = kstrtoul(buf, 10, &val);
459 if (err)
460 return err;
461 if (val)
462 return -EINVAL;
463
464 mutex_lock(&data->update_lock);
465 reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
466 w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
467 data->valid = 0; /* Force cache refresh */
468 mutex_unlock(&data->update_lock);
469 return count;
470 }
471
472 #define FAN_INPUT 0
473 #define FAN_MIN 1
474 static ssize_t
475 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
476 {
477 struct sensor_device_attribute_2 *sensor_attr =
478 to_sensor_dev_attr_2(attr);
479 int nr = sensor_attr->nr;
480 int index = sensor_attr->index;
481 struct w83793_data *data = w83793_update_device(dev);
482 u16 val;
483
484 if (nr == FAN_INPUT)
485 val = data->fan[index] & 0x0fff;
486 else
487 val = data->fan_min[index] & 0x0fff;
488
489 return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
490 }
491
492 static ssize_t
493 store_fan_min(struct device *dev, struct device_attribute *attr,
494 const char *buf, size_t count)
495 {
496 struct sensor_device_attribute_2 *sensor_attr =
497 to_sensor_dev_attr_2(attr);
498 int index = sensor_attr->index;
499 struct i2c_client *client = to_i2c_client(dev);
500 struct w83793_data *data = i2c_get_clientdata(client);
501 unsigned long val;
502 int err;
503
504 err = kstrtoul(buf, 10, &val);
505 if (err)
506 return err;
507 val = FAN_TO_REG(val);
508
509 mutex_lock(&data->update_lock);
510 data->fan_min[index] = val;
511 w83793_write_value(client, W83793_REG_FAN_MIN(index),
512 (val >> 8) & 0xff);
513 w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
514 mutex_unlock(&data->update_lock);
515
516 return count;
517 }
518
519 static ssize_t
520 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
521 {
522 struct sensor_device_attribute_2 *sensor_attr =
523 to_sensor_dev_attr_2(attr);
524 struct w83793_data *data = w83793_update_device(dev);
525 u16 val;
526 int nr = sensor_attr->nr;
527 int index = sensor_attr->index;
528
529 if (nr == PWM_STOP_TIME)
530 val = TIME_FROM_REG(data->pwm_stop_time[index]);
531 else
532 val = (data->pwm[index][nr] & 0x3f) << 2;
533
534 return sprintf(buf, "%d\n", val);
535 }
536
537 static ssize_t
538 store_pwm(struct device *dev, struct device_attribute *attr,
539 const char *buf, size_t count)
540 {
541 struct i2c_client *client = to_i2c_client(dev);
542 struct w83793_data *data = i2c_get_clientdata(client);
543 struct sensor_device_attribute_2 *sensor_attr =
544 to_sensor_dev_attr_2(attr);
545 int nr = sensor_attr->nr;
546 int index = sensor_attr->index;
547 unsigned long val;
548 int err;
549
550 err = kstrtoul(buf, 10, &val);
551 if (err)
552 return err;
553
554 mutex_lock(&data->update_lock);
555 if (nr == PWM_STOP_TIME) {
556 val = TIME_TO_REG(val);
557 data->pwm_stop_time[index] = val;
558 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
559 val);
560 } else {
561 val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
562 data->pwm[index][nr] =
563 w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
564 data->pwm[index][nr] |= val;
565 w83793_write_value(client, W83793_REG_PWM(index, nr),
566 data->pwm[index][nr]);
567 }
568
569 mutex_unlock(&data->update_lock);
570 return count;
571 }
572
573 static ssize_t
574 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
575 {
576 struct sensor_device_attribute_2 *sensor_attr =
577 to_sensor_dev_attr_2(attr);
578 int nr = sensor_attr->nr;
579 int index = sensor_attr->index;
580 struct w83793_data *data = w83793_update_device(dev);
581 long temp = TEMP_FROM_REG(data->temp[index][nr]);
582
583 if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */
584 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
585 temp += temp > 0 ? low : -low;
586 }
587 return sprintf(buf, "%ld\n", temp);
588 }
589
590 static ssize_t
591 store_temp(struct device *dev, struct device_attribute *attr,
592 const char *buf, size_t count)
593 {
594 struct sensor_device_attribute_2 *sensor_attr =
595 to_sensor_dev_attr_2(attr);
596 int nr = sensor_attr->nr;
597 int index = sensor_attr->index;
598 struct i2c_client *client = to_i2c_client(dev);
599 struct w83793_data *data = i2c_get_clientdata(client);
600 long tmp;
601 int err;
602
603 err = kstrtol(buf, 10, &tmp);
604 if (err)
605 return err;
606
607 mutex_lock(&data->update_lock);
608 data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
609 w83793_write_value(client, W83793_REG_TEMP[index][nr],
610 data->temp[index][nr]);
611 mutex_unlock(&data->update_lock);
612 return count;
613 }
614
615 /*
616 * TD1-TD4
617 * each has 4 mode:(2 bits)
618 * 0: Stop monitor
619 * 1: Use internal temp sensor(default)
620 * 2: Reserved
621 * 3: Use sensor in Intel CPU and get result by PECI
622 *
623 * TR1-TR2
624 * each has 2 mode:(1 bit)
625 * 0: Disable temp sensor monitor
626 * 1: To enable temp sensors monitor
627 */
628
629 /* 0 disable, 6 PECI */
630 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
631
632 static ssize_t
633 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
634 {
635 struct w83793_data *data = w83793_update_device(dev);
636 struct sensor_device_attribute_2 *sensor_attr =
637 to_sensor_dev_attr_2(attr);
638 int index = sensor_attr->index;
639 u8 mask = (index < 4) ? 0x03 : 0x01;
640 u8 shift = (index < 4) ? (2 * index) : (index - 4);
641 u8 tmp;
642 index = (index < 4) ? 0 : 1;
643
644 tmp = (data->temp_mode[index] >> shift) & mask;
645
646 /* for the internal sensor, found out if diode or thermistor */
647 if (tmp == 1)
648 tmp = index == 0 ? 3 : 4;
649 else
650 tmp = TO_TEMP_MODE[tmp];
651
652 return sprintf(buf, "%d\n", tmp);
653 }
654
655 static ssize_t
656 store_temp_mode(struct device *dev, struct device_attribute *attr,
657 const char *buf, size_t count)
658 {
659 struct i2c_client *client = to_i2c_client(dev);
660 struct w83793_data *data = i2c_get_clientdata(client);
661 struct sensor_device_attribute_2 *sensor_attr =
662 to_sensor_dev_attr_2(attr);
663 int index = sensor_attr->index;
664 u8 mask = (index < 4) ? 0x03 : 0x01;
665 u8 shift = (index < 4) ? (2 * index) : (index - 4);
666 unsigned long val;
667 int err;
668
669 err = kstrtoul(buf, 10, &val);
670 if (err)
671 return err;
672
673 /* transform the sysfs interface values into table above */
674 if ((val == 6) && (index < 4)) {
675 val -= 3;
676 } else if ((val == 3 && index < 4)
677 || (val == 4 && index >= 4)) {
678 /* transform diode or thermistor into internal enable */
679 val = !!val;
680 } else {
681 return -EINVAL;
682 }
683
684 index = (index < 4) ? 0 : 1;
685 mutex_lock(&data->update_lock);
686 data->temp_mode[index] =
687 w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
688 data->temp_mode[index] &= ~(mask << shift);
689 data->temp_mode[index] |= val << shift;
690 w83793_write_value(client, W83793_REG_TEMP_MODE[index],
691 data->temp_mode[index]);
692 mutex_unlock(&data->update_lock);
693
694 return count;
695 }
696
697 #define SETUP_PWM_DEFAULT 0
698 #define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */
699 #define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */
700 #define SETUP_TEMP_CRITICAL 3
701 static ssize_t
702 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
703 {
704 struct sensor_device_attribute_2 *sensor_attr =
705 to_sensor_dev_attr_2(attr);
706 int nr = sensor_attr->nr;
707 struct w83793_data *data = w83793_update_device(dev);
708 u32 val = 0;
709
710 if (nr == SETUP_PWM_DEFAULT)
711 val = (data->pwm_default & 0x3f) << 2;
712 else if (nr == SETUP_PWM_UPTIME)
713 val = TIME_FROM_REG(data->pwm_uptime);
714 else if (nr == SETUP_PWM_DOWNTIME)
715 val = TIME_FROM_REG(data->pwm_downtime);
716 else if (nr == SETUP_TEMP_CRITICAL)
717 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
718
719 return sprintf(buf, "%d\n", val);
720 }
721
722 static ssize_t
723 store_sf_setup(struct device *dev, struct device_attribute *attr,
724 const char *buf, size_t count)
725 {
726 struct sensor_device_attribute_2 *sensor_attr =
727 to_sensor_dev_attr_2(attr);
728 int nr = sensor_attr->nr;
729 struct i2c_client *client = to_i2c_client(dev);
730 struct w83793_data *data = i2c_get_clientdata(client);
731 long val;
732 int err;
733
734 err = kstrtol(buf, 10, &val);
735 if (err)
736 return err;
737
738 mutex_lock(&data->update_lock);
739 if (nr == SETUP_PWM_DEFAULT) {
740 data->pwm_default =
741 w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
742 data->pwm_default |= SENSORS_LIMIT(val, 0, 0xff) >> 2;
743 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
744 data->pwm_default);
745 } else if (nr == SETUP_PWM_UPTIME) {
746 data->pwm_uptime = TIME_TO_REG(val);
747 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
748 w83793_write_value(client, W83793_REG_PWM_UPTIME,
749 data->pwm_uptime);
750 } else if (nr == SETUP_PWM_DOWNTIME) {
751 data->pwm_downtime = TIME_TO_REG(val);
752 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
753 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
754 data->pwm_downtime);
755 } else { /* SETUP_TEMP_CRITICAL */
756 data->temp_critical =
757 w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
758 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
759 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
760 data->temp_critical);
761 }
762
763 mutex_unlock(&data->update_lock);
764 return count;
765 }
766
767 /*
768 * Temp SmartFan control
769 * TEMP_FAN_MAP
770 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
771 * It's possible two or more temp channels control the same fan, w83793
772 * always prefers to pick the most critical request and applies it to
773 * the related Fan.
774 * It's possible one fan is not in any mapping of 6 temp channels, this
775 * means the fan is manual mode
776 *
777 * TEMP_PWM_ENABLE
778 * Each temp channel has its own SmartFan mode, and temp channel
779 * control fans that are set by TEMP_FAN_MAP
780 * 0: SmartFanII mode
781 * 1: Thermal Cruise Mode
782 *
783 * TEMP_CRUISE
784 * Target temperature in thermal cruise mode, w83793 will try to turn
785 * fan speed to keep the temperature of target device around this
786 * temperature.
787 *
788 * TEMP_TOLERANCE
789 * If Temp higher or lower than target with this tolerance, w83793
790 * will take actions to speed up or slow down the fan to keep the
791 * temperature within the tolerance range.
792 */
793
794 #define TEMP_FAN_MAP 0
795 #define TEMP_PWM_ENABLE 1
796 #define TEMP_CRUISE 2
797 #define TEMP_TOLERANCE 3
798 static ssize_t
799 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
800 {
801 struct sensor_device_attribute_2 *sensor_attr =
802 to_sensor_dev_attr_2(attr);
803 int nr = sensor_attr->nr;
804 int index = sensor_attr->index;
805 struct w83793_data *data = w83793_update_device(dev);
806 u32 val;
807
808 if (nr == TEMP_FAN_MAP) {
809 val = data->temp_fan_map[index];
810 } else if (nr == TEMP_PWM_ENABLE) {
811 /* +2 to transfrom into 2 and 3 to conform with sysfs intf */
812 val = ((data->pwm_enable >> index) & 0x01) + 2;
813 } else if (nr == TEMP_CRUISE) {
814 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
815 } else { /* TEMP_TOLERANCE */
816 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
817 val = TEMP_FROM_REG(val & 0x0f);
818 }
819 return sprintf(buf, "%d\n", val);
820 }
821
822 static ssize_t
823 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
824 const char *buf, size_t count)
825 {
826 struct sensor_device_attribute_2 *sensor_attr =
827 to_sensor_dev_attr_2(attr);
828 int nr = sensor_attr->nr;
829 int index = sensor_attr->index;
830 struct i2c_client *client = to_i2c_client(dev);
831 struct w83793_data *data = i2c_get_clientdata(client);
832 long val;
833 int err;
834
835 err = kstrtol(buf, 10, &val);
836 if (err)
837 return err;
838
839 mutex_lock(&data->update_lock);
840 if (nr == TEMP_FAN_MAP) {
841 val = SENSORS_LIMIT(val, 0, 255);
842 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
843 data->temp_fan_map[index] = val;
844 } else if (nr == TEMP_PWM_ENABLE) {
845 if (val == 2 || val == 3) {
846 data->pwm_enable =
847 w83793_read_value(client, W83793_REG_PWM_ENABLE);
848 if (val - 2)
849 data->pwm_enable |= 1 << index;
850 else
851 data->pwm_enable &= ~(1 << index);
852 w83793_write_value(client, W83793_REG_PWM_ENABLE,
853 data->pwm_enable);
854 } else {
855 mutex_unlock(&data->update_lock);
856 return -EINVAL;
857 }
858 } else if (nr == TEMP_CRUISE) {
859 data->temp_cruise[index] =
860 w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
861 data->temp_cruise[index] &= 0x80;
862 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
863
864 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
865 data->temp_cruise[index]);
866 } else { /* TEMP_TOLERANCE */
867 int i = index >> 1;
868 u8 shift = (index & 0x01) ? 4 : 0;
869 data->tolerance[i] =
870 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
871
872 data->tolerance[i] &= ~(0x0f << shift);
873 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
874 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
875 data->tolerance[i]);
876 }
877
878 mutex_unlock(&data->update_lock);
879 return count;
880 }
881
882 static ssize_t
883 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
884 {
885 struct sensor_device_attribute_2 *sensor_attr =
886 to_sensor_dev_attr_2(attr);
887 int nr = sensor_attr->nr;
888 int index = sensor_attr->index;
889 struct w83793_data *data = w83793_update_device(dev);
890
891 return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
892 }
893
894 static ssize_t
895 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
896 const char *buf, size_t count)
897 {
898 struct i2c_client *client = to_i2c_client(dev);
899 struct w83793_data *data = i2c_get_clientdata(client);
900 struct sensor_device_attribute_2 *sensor_attr =
901 to_sensor_dev_attr_2(attr);
902 int nr = sensor_attr->nr;
903 int index = sensor_attr->index;
904 unsigned long val;
905 int err;
906
907 err = kstrtoul(buf, 10, &val);
908 if (err)
909 return err;
910 val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
911
912 mutex_lock(&data->update_lock);
913 data->sf2_pwm[index][nr] =
914 w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
915 data->sf2_pwm[index][nr] |= val;
916 w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
917 data->sf2_pwm[index][nr]);
918 mutex_unlock(&data->update_lock);
919 return count;
920 }
921
922 static ssize_t
923 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
924 {
925 struct sensor_device_attribute_2 *sensor_attr =
926 to_sensor_dev_attr_2(attr);
927 int nr = sensor_attr->nr;
928 int index = sensor_attr->index;
929 struct w83793_data *data = w83793_update_device(dev);
930
931 return sprintf(buf, "%ld\n",
932 TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
933 }
934
935 static ssize_t
936 store_sf2_temp(struct device *dev, struct device_attribute *attr,
937 const char *buf, size_t count)
938 {
939 struct i2c_client *client = to_i2c_client(dev);
940 struct w83793_data *data = i2c_get_clientdata(client);
941 struct sensor_device_attribute_2 *sensor_attr =
942 to_sensor_dev_attr_2(attr);
943 int nr = sensor_attr->nr;
944 int index = sensor_attr->index;
945 long val;
946 int err;
947
948 err = kstrtol(buf, 10, &val);
949 if (err)
950 return err;
951 val = TEMP_TO_REG(val, 0, 0x7f);
952
953 mutex_lock(&data->update_lock);
954 data->sf2_temp[index][nr] =
955 w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
956 data->sf2_temp[index][nr] |= val;
957 w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
958 data->sf2_temp[index][nr]);
959 mutex_unlock(&data->update_lock);
960 return count;
961 }
962
963 /* only Vcore A/B and Vtt have additional 2 bits precision */
964 static ssize_t
965 show_in(struct device *dev, struct device_attribute *attr, char *buf)
966 {
967 struct sensor_device_attribute_2 *sensor_attr =
968 to_sensor_dev_attr_2(attr);
969 int nr = sensor_attr->nr;
970 int index = sensor_attr->index;
971 struct w83793_data *data = w83793_update_device(dev);
972 u16 val = data->in[index][nr];
973
974 if (index < 3) {
975 val <<= 2;
976 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
977 }
978 /* voltage inputs 5VDD and 5VSB needs 150mV offset */
979 val = val * scale_in[index] + scale_in_add[index];
980 return sprintf(buf, "%d\n", val);
981 }
982
983 static ssize_t
984 store_in(struct device *dev, struct device_attribute *attr,
985 const char *buf, size_t count)
986 {
987 struct sensor_device_attribute_2 *sensor_attr =
988 to_sensor_dev_attr_2(attr);
989 int nr = sensor_attr->nr;
990 int index = sensor_attr->index;
991 struct i2c_client *client = to_i2c_client(dev);
992 struct w83793_data *data = i2c_get_clientdata(client);
993 unsigned long val;
994 int err;
995
996 err = kstrtoul(buf, 10, &val);
997 if (err)
998 return err;
999 val = (val + scale_in[index] / 2) / scale_in[index];
1000
1001 mutex_lock(&data->update_lock);
1002 if (index > 2) {
1003 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
1004 if (nr == 1 || nr == 2)
1005 val -= scale_in_add[index] / scale_in[index];
1006 val = SENSORS_LIMIT(val, 0, 255);
1007 } else {
1008 val = SENSORS_LIMIT(val, 0, 0x3FF);
1009 data->in_low_bits[nr] =
1010 w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1011 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1012 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1013 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1014 data->in_low_bits[nr]);
1015 val >>= 2;
1016 }
1017 data->in[index][nr] = val;
1018 w83793_write_value(client, W83793_REG_IN[index][nr],
1019 data->in[index][nr]);
1020 mutex_unlock(&data->update_lock);
1021 return count;
1022 }
1023
1024 #define NOT_USED -1
1025
1026 #define SENSOR_ATTR_IN(index) \
1027 SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \
1028 IN_READ, index), \
1029 SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \
1030 store_in, IN_MAX, index), \
1031 SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \
1032 store_in, IN_LOW, index), \
1033 SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \
1034 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \
1035 SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \
1036 show_alarm_beep, store_beep, BEEP_ENABLE, \
1037 index + ((index > 2) ? 1 : 0))
1038
1039 #define SENSOR_ATTR_FAN(index) \
1040 SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \
1041 NULL, ALARM_STATUS, index + 17), \
1042 SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \
1043 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \
1044 SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \
1045 NULL, FAN_INPUT, index - 1), \
1046 SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \
1047 show_fan, store_fan_min, FAN_MIN, index - 1)
1048
1049 #define SENSOR_ATTR_PWM(index) \
1050 SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \
1051 store_pwm, PWM_DUTY, index - 1), \
1052 SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \
1053 show_pwm, store_pwm, PWM_NONSTOP, index - 1), \
1054 SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \
1055 show_pwm, store_pwm, PWM_START, index - 1), \
1056 SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \
1057 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1058
1059 #define SENSOR_ATTR_TEMP(index) \
1060 SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \
1061 show_temp_mode, store_temp_mode, NOT_USED, index - 1), \
1062 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \
1063 NULL, TEMP_READ, index - 1), \
1064 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \
1065 store_temp, TEMP_CRIT, index - 1), \
1066 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
1067 show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \
1068 SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1069 store_temp, TEMP_WARN, index - 1), \
1070 SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \
1071 show_temp, store_temp, TEMP_WARN_HYST, index - 1), \
1072 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
1073 show_alarm_beep, NULL, ALARM_STATUS, index + 11), \
1074 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
1075 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \
1076 SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \
1077 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \
1078 TEMP_FAN_MAP, index - 1), \
1079 SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
1080 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \
1081 index - 1), \
1082 SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \
1083 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \
1084 SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1085 store_sf_ctrl, TEMP_TOLERANCE, index - 1), \
1086 SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1087 show_sf2_pwm, store_sf2_pwm, 0, index - 1), \
1088 SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1089 show_sf2_pwm, store_sf2_pwm, 1, index - 1), \
1090 SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1091 show_sf2_pwm, store_sf2_pwm, 2, index - 1), \
1092 SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1093 show_sf2_pwm, store_sf2_pwm, 3, index - 1), \
1094 SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1095 show_sf2_pwm, store_sf2_pwm, 4, index - 1), \
1096 SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1097 show_sf2_pwm, store_sf2_pwm, 5, index - 1), \
1098 SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1099 show_sf2_pwm, store_sf2_pwm, 6, index - 1), \
1100 SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1101 show_sf2_temp, store_sf2_temp, 0, index - 1), \
1102 SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1103 show_sf2_temp, store_sf2_temp, 1, index - 1), \
1104 SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1105 show_sf2_temp, store_sf2_temp, 2, index - 1), \
1106 SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1107 show_sf2_temp, store_sf2_temp, 3, index - 1), \
1108 SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1109 show_sf2_temp, store_sf2_temp, 4, index - 1), \
1110 SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1111 show_sf2_temp, store_sf2_temp, 5, index - 1), \
1112 SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1113 show_sf2_temp, store_sf2_temp, 6, index - 1)
1114
1115 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1116 SENSOR_ATTR_IN(0),
1117 SENSOR_ATTR_IN(1),
1118 SENSOR_ATTR_IN(2),
1119 SENSOR_ATTR_IN(3),
1120 SENSOR_ATTR_IN(4),
1121 SENSOR_ATTR_IN(5),
1122 SENSOR_ATTR_IN(6),
1123 SENSOR_ATTR_IN(7),
1124 SENSOR_ATTR_IN(8),
1125 SENSOR_ATTR_IN(9),
1126 SENSOR_ATTR_FAN(1),
1127 SENSOR_ATTR_FAN(2),
1128 SENSOR_ATTR_FAN(3),
1129 SENSOR_ATTR_FAN(4),
1130 SENSOR_ATTR_FAN(5),
1131 SENSOR_ATTR_PWM(1),
1132 SENSOR_ATTR_PWM(2),
1133 SENSOR_ATTR_PWM(3),
1134 };
1135
1136 static struct sensor_device_attribute_2 w83793_temp[] = {
1137 SENSOR_ATTR_TEMP(1),
1138 SENSOR_ATTR_TEMP(2),
1139 SENSOR_ATTR_TEMP(3),
1140 SENSOR_ATTR_TEMP(4),
1141 SENSOR_ATTR_TEMP(5),
1142 SENSOR_ATTR_TEMP(6),
1143 };
1144
1145 /* Fan6-Fan12 */
1146 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1147 SENSOR_ATTR_FAN(6),
1148 SENSOR_ATTR_FAN(7),
1149 SENSOR_ATTR_FAN(8),
1150 SENSOR_ATTR_FAN(9),
1151 SENSOR_ATTR_FAN(10),
1152 SENSOR_ATTR_FAN(11),
1153 SENSOR_ATTR_FAN(12),
1154 };
1155
1156 /* Pwm4-Pwm8 */
1157 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1158 SENSOR_ATTR_PWM(4),
1159 SENSOR_ATTR_PWM(5),
1160 SENSOR_ATTR_PWM(6),
1161 SENSOR_ATTR_PWM(7),
1162 SENSOR_ATTR_PWM(8),
1163 };
1164
1165 static struct sensor_device_attribute_2 w83793_vid[] = {
1166 SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1167 SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1168 };
1169 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
1170
1171 static struct sensor_device_attribute_2 sda_single_files[] = {
1172 SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1173 store_chassis_clear, ALARM_STATUS, 30),
1174 SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1175 store_beep_enable, NOT_USED, NOT_USED),
1176 SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1177 store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1178 SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1179 store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1180 SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1181 store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1182 SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1183 store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1184 };
1185
1186 static void w83793_init_client(struct i2c_client *client)
1187 {
1188 if (reset)
1189 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1190
1191 /* Start monitoring */
1192 w83793_write_value(client, W83793_REG_CONFIG,
1193 w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1194 }
1195
1196 /*
1197 * Watchdog routines
1198 */
1199
1200 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1201 {
1202 int ret, mtimeout;
1203
1204 mtimeout = DIV_ROUND_UP(timeout, 60);
1205
1206 if (mtimeout > 255)
1207 return -EINVAL;
1208
1209 mutex_lock(&data->watchdog_lock);
1210 if (!data->client) {
1211 ret = -ENODEV;
1212 goto leave;
1213 }
1214
1215 data->watchdog_timeout = mtimeout;
1216
1217 /* Set Timeout value (in Minutes) */
1218 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1219 data->watchdog_timeout);
1220
1221 ret = mtimeout * 60;
1222
1223 leave:
1224 mutex_unlock(&data->watchdog_lock);
1225 return ret;
1226 }
1227
1228 static int watchdog_get_timeout(struct w83793_data *data)
1229 {
1230 int timeout;
1231
1232 mutex_lock(&data->watchdog_lock);
1233 timeout = data->watchdog_timeout * 60;
1234 mutex_unlock(&data->watchdog_lock);
1235
1236 return timeout;
1237 }
1238
1239 static int watchdog_trigger(struct w83793_data *data)
1240 {
1241 int ret = 0;
1242
1243 mutex_lock(&data->watchdog_lock);
1244 if (!data->client) {
1245 ret = -ENODEV;
1246 goto leave;
1247 }
1248
1249 /* Set Timeout value (in Minutes) */
1250 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1251 data->watchdog_timeout);
1252
1253 leave:
1254 mutex_unlock(&data->watchdog_lock);
1255 return ret;
1256 }
1257
1258 static int watchdog_enable(struct w83793_data *data)
1259 {
1260 int ret = 0;
1261
1262 mutex_lock(&data->watchdog_lock);
1263 if (!data->client) {
1264 ret = -ENODEV;
1265 goto leave;
1266 }
1267
1268 /* Set initial timeout */
1269 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1270 data->watchdog_timeout);
1271
1272 /* Enable Soft Watchdog */
1273 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1274
1275 leave:
1276 mutex_unlock(&data->watchdog_lock);
1277 return ret;
1278 }
1279
1280 static int watchdog_disable(struct w83793_data *data)
1281 {
1282 int ret = 0;
1283
1284 mutex_lock(&data->watchdog_lock);
1285 if (!data->client) {
1286 ret = -ENODEV;
1287 goto leave;
1288 }
1289
1290 /* Disable Soft Watchdog */
1291 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1292
1293 leave:
1294 mutex_unlock(&data->watchdog_lock);
1295 return ret;
1296 }
1297
1298 static int watchdog_open(struct inode *inode, struct file *filp)
1299 {
1300 struct w83793_data *pos, *data = NULL;
1301 int watchdog_is_open;
1302
1303 /*
1304 * We get called from drivers/char/misc.c with misc_mtx hold, and we
1305 * call misc_register() from w83793_probe() with watchdog_data_mutex
1306 * hold, as misc_register() takes the misc_mtx lock, this is a possible
1307 * deadlock, so we use mutex_trylock here.
1308 */
1309 if (!mutex_trylock(&watchdog_data_mutex))
1310 return -ERESTARTSYS;
1311 list_for_each_entry(pos, &watchdog_data_list, list) {
1312 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1313 data = pos;
1314 break;
1315 }
1316 }
1317
1318 /* Check, if device is already open */
1319 watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1320
1321 /*
1322 * Increase data reference counter (if not already done).
1323 * Note we can never not have found data, so we don't check for this
1324 */
1325 if (!watchdog_is_open)
1326 kref_get(&data->kref);
1327
1328 mutex_unlock(&watchdog_data_mutex);
1329
1330 /* Check, if device is already open and possibly issue error */
1331 if (watchdog_is_open)
1332 return -EBUSY;
1333
1334 /* Enable Soft Watchdog */
1335 watchdog_enable(data);
1336
1337 /* Store pointer to data into filp's private data */
1338 filp->private_data = data;
1339
1340 return nonseekable_open(inode, filp);
1341 }
1342
1343 static int watchdog_close(struct inode *inode, struct file *filp)
1344 {
1345 struct w83793_data *data = filp->private_data;
1346
1347 if (data->watchdog_expect_close) {
1348 watchdog_disable(data);
1349 data->watchdog_expect_close = 0;
1350 } else {
1351 watchdog_trigger(data);
1352 dev_crit(&data->client->dev,
1353 "unexpected close, not stopping watchdog!\n");
1354 }
1355
1356 clear_bit(0, &data->watchdog_is_open);
1357
1358 /* Decrease data reference counter */
1359 mutex_lock(&watchdog_data_mutex);
1360 kref_put(&data->kref, w83793_release_resources);
1361 mutex_unlock(&watchdog_data_mutex);
1362
1363 return 0;
1364 }
1365
1366 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1367 size_t count, loff_t *offset)
1368 {
1369 ssize_t ret;
1370 struct w83793_data *data = filp->private_data;
1371
1372 if (count) {
1373 if (!nowayout) {
1374 size_t i;
1375
1376 /* Clear it in case it was set with a previous write */
1377 data->watchdog_expect_close = 0;
1378
1379 for (i = 0; i != count; i++) {
1380 char c;
1381 if (get_user(c, buf + i))
1382 return -EFAULT;
1383 if (c == 'V')
1384 data->watchdog_expect_close = 1;
1385 }
1386 }
1387 ret = watchdog_trigger(data);
1388 if (ret < 0)
1389 return ret;
1390 }
1391 return count;
1392 }
1393
1394 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1395 unsigned long arg)
1396 {
1397 struct watchdog_info ident = {
1398 .options = WDIOF_KEEPALIVEPING |
1399 WDIOF_SETTIMEOUT |
1400 WDIOF_CARDRESET,
1401 .identity = "w83793 watchdog"
1402 };
1403
1404 int val, ret = 0;
1405 struct w83793_data *data = filp->private_data;
1406
1407 switch (cmd) {
1408 case WDIOC_GETSUPPORT:
1409 if (!nowayout)
1410 ident.options |= WDIOF_MAGICCLOSE;
1411 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1412 ret = -EFAULT;
1413 break;
1414
1415 case WDIOC_GETSTATUS:
1416 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1417 ret = put_user(val, (int __user *)arg);
1418 break;
1419
1420 case WDIOC_GETBOOTSTATUS:
1421 ret = put_user(0, (int __user *)arg);
1422 break;
1423
1424 case WDIOC_KEEPALIVE:
1425 ret = watchdog_trigger(data);
1426 break;
1427
1428 case WDIOC_GETTIMEOUT:
1429 val = watchdog_get_timeout(data);
1430 ret = put_user(val, (int __user *)arg);
1431 break;
1432
1433 case WDIOC_SETTIMEOUT:
1434 if (get_user(val, (int __user *)arg)) {
1435 ret = -EFAULT;
1436 break;
1437 }
1438 ret = watchdog_set_timeout(data, val);
1439 if (ret > 0)
1440 ret = put_user(ret, (int __user *)arg);
1441 break;
1442
1443 case WDIOC_SETOPTIONS:
1444 if (get_user(val, (int __user *)arg)) {
1445 ret = -EFAULT;
1446 break;
1447 }
1448
1449 if (val & WDIOS_DISABLECARD)
1450 ret = watchdog_disable(data);
1451 else if (val & WDIOS_ENABLECARD)
1452 ret = watchdog_enable(data);
1453 else
1454 ret = -EINVAL;
1455
1456 break;
1457 default:
1458 ret = -ENOTTY;
1459 }
1460 return ret;
1461 }
1462
1463 static const struct file_operations watchdog_fops = {
1464 .owner = THIS_MODULE,
1465 .llseek = no_llseek,
1466 .open = watchdog_open,
1467 .release = watchdog_close,
1468 .write = watchdog_write,
1469 .unlocked_ioctl = watchdog_ioctl,
1470 };
1471
1472 /*
1473 * Notifier for system down
1474 */
1475
1476 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1477 void *unused)
1478 {
1479 struct w83793_data *data = NULL;
1480
1481 if (code == SYS_DOWN || code == SYS_HALT) {
1482
1483 /* Disable each registered watchdog */
1484 mutex_lock(&watchdog_data_mutex);
1485 list_for_each_entry(data, &watchdog_data_list, list) {
1486 if (data->watchdog_miscdev.minor)
1487 watchdog_disable(data);
1488 }
1489 mutex_unlock(&watchdog_data_mutex);
1490 }
1491
1492 return NOTIFY_DONE;
1493 }
1494
1495 /*
1496 * The WDT needs to learn about soft shutdowns in order to
1497 * turn the timebomb registers off.
1498 */
1499
1500 static struct notifier_block watchdog_notifier = {
1501 .notifier_call = watchdog_notify_sys,
1502 };
1503
1504 /*
1505 * Init / remove routines
1506 */
1507
1508 static int w83793_remove(struct i2c_client *client)
1509 {
1510 struct w83793_data *data = i2c_get_clientdata(client);
1511 struct device *dev = &client->dev;
1512 int i, tmp;
1513
1514 /* Unregister the watchdog (if registered) */
1515 if (data->watchdog_miscdev.minor) {
1516 misc_deregister(&data->watchdog_miscdev);
1517
1518 if (data->watchdog_is_open) {
1519 dev_warn(&client->dev,
1520 "i2c client detached with watchdog open! "
1521 "Stopping watchdog.\n");
1522 watchdog_disable(data);
1523 }
1524
1525 mutex_lock(&watchdog_data_mutex);
1526 list_del(&data->list);
1527 mutex_unlock(&watchdog_data_mutex);
1528
1529 /* Tell the watchdog code the client is gone */
1530 mutex_lock(&data->watchdog_lock);
1531 data->client = NULL;
1532 mutex_unlock(&data->watchdog_lock);
1533 }
1534
1535 /* Reset Configuration Register to Disable Watch Dog Registers */
1536 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1537 w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1538
1539 unregister_reboot_notifier(&watchdog_notifier);
1540
1541 hwmon_device_unregister(data->hwmon_dev);
1542
1543 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1544 device_remove_file(dev,
1545 &w83793_sensor_attr_2[i].dev_attr);
1546
1547 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1548 device_remove_file(dev, &sda_single_files[i].dev_attr);
1549
1550 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1551 device_remove_file(dev, &w83793_vid[i].dev_attr);
1552 device_remove_file(dev, &dev_attr_vrm);
1553
1554 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1555 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1556
1557 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1558 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1559
1560 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1561 device_remove_file(dev, &w83793_temp[i].dev_attr);
1562
1563 if (data->lm75[0] != NULL)
1564 i2c_unregister_device(data->lm75[0]);
1565 if (data->lm75[1] != NULL)
1566 i2c_unregister_device(data->lm75[1]);
1567
1568 /* Decrease data reference counter */
1569 mutex_lock(&watchdog_data_mutex);
1570 kref_put(&data->kref, w83793_release_resources);
1571 mutex_unlock(&watchdog_data_mutex);
1572
1573 return 0;
1574 }
1575
1576 static int
1577 w83793_detect_subclients(struct i2c_client *client)
1578 {
1579 int i, id, err;
1580 int address = client->addr;
1581 u8 tmp;
1582 struct i2c_adapter *adapter = client->adapter;
1583 struct w83793_data *data = i2c_get_clientdata(client);
1584
1585 id = i2c_adapter_id(adapter);
1586 if (force_subclients[0] == id && force_subclients[1] == address) {
1587 for (i = 2; i <= 3; i++) {
1588 if (force_subclients[i] < 0x48
1589 || force_subclients[i] > 0x4f) {
1590 dev_err(&client->dev,
1591 "invalid subclient "
1592 "address %d; must be 0x48-0x4f\n",
1593 force_subclients[i]);
1594 err = -EINVAL;
1595 goto ERROR_SC_0;
1596 }
1597 }
1598 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1599 (force_subclients[2] & 0x07) |
1600 ((force_subclients[3] & 0x07) << 4));
1601 }
1602
1603 tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1604 if (!(tmp & 0x08))
1605 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1606 if (!(tmp & 0x80)) {
1607 if ((data->lm75[0] != NULL)
1608 && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1609 dev_err(&client->dev,
1610 "duplicate addresses 0x%x, "
1611 "use force_subclients\n", data->lm75[0]->addr);
1612 err = -ENODEV;
1613 goto ERROR_SC_1;
1614 }
1615 data->lm75[1] = i2c_new_dummy(adapter,
1616 0x48 + ((tmp >> 4) & 0x7));
1617 }
1618
1619 return 0;
1620
1621 /* Undo inits in case of errors */
1622
1623 ERROR_SC_1:
1624 if (data->lm75[0] != NULL)
1625 i2c_unregister_device(data->lm75[0]);
1626 ERROR_SC_0:
1627 return err;
1628 }
1629
1630 /* Return 0 if detection is successful, -ENODEV otherwise */
1631 static int w83793_detect(struct i2c_client *client,
1632 struct i2c_board_info *info)
1633 {
1634 u8 tmp, bank, chip_id;
1635 struct i2c_adapter *adapter = client->adapter;
1636 unsigned short address = client->addr;
1637
1638 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1639 return -ENODEV;
1640
1641 bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1642
1643 tmp = bank & 0x80 ? 0x5c : 0xa3;
1644 /* Check Winbond vendor ID */
1645 if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1646 pr_debug("w83793: Detection failed at check vendor id\n");
1647 return -ENODEV;
1648 }
1649
1650 /*
1651 * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1652 * should match
1653 */
1654 if ((bank & 0x07) == 0
1655 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1656 (address << 1)) {
1657 pr_debug("w83793: Detection failed at check i2c addr\n");
1658 return -ENODEV;
1659 }
1660
1661 /* Determine the chip type now */
1662 chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1663 if (chip_id != 0x7b)
1664 return -ENODEV;
1665
1666 strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1667
1668 return 0;
1669 }
1670
1671 static int w83793_probe(struct i2c_client *client,
1672 const struct i2c_device_id *id)
1673 {
1674 struct device *dev = &client->dev;
1675 const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1676 struct w83793_data *data;
1677 int i, tmp, val, err;
1678 int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1679 int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1680 int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1681
1682 data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1683 if (!data) {
1684 err = -ENOMEM;
1685 goto exit;
1686 }
1687
1688 i2c_set_clientdata(client, data);
1689 data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1690 mutex_init(&data->update_lock);
1691 mutex_init(&data->watchdog_lock);
1692 INIT_LIST_HEAD(&data->list);
1693 kref_init(&data->kref);
1694
1695 /*
1696 * Store client pointer in our data struct for watchdog usage
1697 * (where the client is found through a data ptr instead of the
1698 * otherway around)
1699 */
1700 data->client = client;
1701
1702 err = w83793_detect_subclients(client);
1703 if (err)
1704 goto free_mem;
1705
1706 /* Initialize the chip */
1707 w83793_init_client(client);
1708
1709 /*
1710 * Only fan 1-5 has their own input pins,
1711 * Pwm 1-3 has their own pins
1712 */
1713 data->has_fan = 0x1f;
1714 data->has_pwm = 0x07;
1715 tmp = w83793_read_value(client, W83793_REG_MFC);
1716 val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1717
1718 /* check the function of pins 49-56 */
1719 if (tmp & 0x80) {
1720 data->has_vid |= 0x2; /* has VIDB */
1721 } else {
1722 data->has_pwm |= 0x18; /* pwm 4,5 */
1723 if (val & 0x01) { /* fan 6 */
1724 data->has_fan |= 0x20;
1725 data->has_pwm |= 0x20;
1726 }
1727 if (val & 0x02) { /* fan 7 */
1728 data->has_fan |= 0x40;
1729 data->has_pwm |= 0x40;
1730 }
1731 if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */
1732 data->has_fan |= 0x80;
1733 data->has_pwm |= 0x80;
1734 }
1735 }
1736
1737 /* check the function of pins 37-40 */
1738 if (!(tmp & 0x29))
1739 data->has_vid |= 0x1; /* has VIDA */
1740 if (0x08 == (tmp & 0x0c)) {
1741 if (val & 0x08) /* fan 9 */
1742 data->has_fan |= 0x100;
1743 if (val & 0x10) /* fan 10 */
1744 data->has_fan |= 0x200;
1745 }
1746 if (0x20 == (tmp & 0x30)) {
1747 if (val & 0x20) /* fan 11 */
1748 data->has_fan |= 0x400;
1749 if (val & 0x40) /* fan 12 */
1750 data->has_fan |= 0x800;
1751 }
1752
1753 if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */
1754 data->has_fan |= 0x80;
1755 data->has_pwm |= 0x80;
1756 }
1757
1758 tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1759 if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */
1760 data->has_fan |= 0x100;
1761 }
1762 if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */
1763 data->has_fan |= 0x200;
1764 }
1765 if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */
1766 data->has_fan |= 0x400;
1767 }
1768 if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */
1769 data->has_fan |= 0x800;
1770 }
1771
1772 /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1773 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1774 if (tmp & 0x01)
1775 data->has_temp |= 0x01;
1776 if (tmp & 0x04)
1777 data->has_temp |= 0x02;
1778 if (tmp & 0x10)
1779 data->has_temp |= 0x04;
1780 if (tmp & 0x40)
1781 data->has_temp |= 0x08;
1782
1783 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1784 if (tmp & 0x01)
1785 data->has_temp |= 0x10;
1786 if (tmp & 0x02)
1787 data->has_temp |= 0x20;
1788
1789 /* Register sysfs hooks */
1790 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1791 err = device_create_file(dev,
1792 &w83793_sensor_attr_2[i].dev_attr);
1793 if (err)
1794 goto exit_remove;
1795 }
1796
1797 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1798 if (!(data->has_vid & (1 << i)))
1799 continue;
1800 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1801 if (err)
1802 goto exit_remove;
1803 }
1804 if (data->has_vid) {
1805 data->vrm = vid_which_vrm();
1806 err = device_create_file(dev, &dev_attr_vrm);
1807 if (err)
1808 goto exit_remove;
1809 }
1810
1811 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1812 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1813 if (err)
1814 goto exit_remove;
1815
1816 }
1817
1818 for (i = 0; i < 6; i++) {
1819 int j;
1820 if (!(data->has_temp & (1 << i)))
1821 continue;
1822 for (j = 0; j < files_temp; j++) {
1823 err = device_create_file(dev,
1824 &w83793_temp[(i) * files_temp
1825 + j].dev_attr);
1826 if (err)
1827 goto exit_remove;
1828 }
1829 }
1830
1831 for (i = 5; i < 12; i++) {
1832 int j;
1833 if (!(data->has_fan & (1 << i)))
1834 continue;
1835 for (j = 0; j < files_fan; j++) {
1836 err = device_create_file(dev,
1837 &w83793_left_fan[(i - 5) * files_fan
1838 + j].dev_attr);
1839 if (err)
1840 goto exit_remove;
1841 }
1842 }
1843
1844 for (i = 3; i < 8; i++) {
1845 int j;
1846 if (!(data->has_pwm & (1 << i)))
1847 continue;
1848 for (j = 0; j < files_pwm; j++) {
1849 err = device_create_file(dev,
1850 &w83793_left_pwm[(i - 3) * files_pwm
1851 + j].dev_attr);
1852 if (err)
1853 goto exit_remove;
1854 }
1855 }
1856
1857 data->hwmon_dev = hwmon_device_register(dev);
1858 if (IS_ERR(data->hwmon_dev)) {
1859 err = PTR_ERR(data->hwmon_dev);
1860 goto exit_remove;
1861 }
1862
1863 /* Watchdog initialization */
1864
1865 /* Register boot notifier */
1866 err = register_reboot_notifier(&watchdog_notifier);
1867 if (err != 0) {
1868 dev_err(&client->dev,
1869 "cannot register reboot notifier (err=%d)\n", err);
1870 goto exit_devunreg;
1871 }
1872
1873 /*
1874 * Enable Watchdog registers.
1875 * Set Configuration Register to Enable Watch Dog Registers
1876 * (Bit 2) = XXXX, X1XX.
1877 */
1878 tmp = w83793_read_value(client, W83793_REG_CONFIG);
1879 w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1880
1881 /* Set the default watchdog timeout */
1882 data->watchdog_timeout = timeout;
1883
1884 /* Check, if last reboot was caused by watchdog */
1885 data->watchdog_caused_reboot =
1886 w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1887
1888 /* Disable Soft Watchdog during initialiation */
1889 watchdog_disable(data);
1890
1891 /*
1892 * We take the data_mutex lock early so that watchdog_open() cannot
1893 * run when misc_register() has completed, but we've not yet added
1894 * our data to the watchdog_data_list (and set the default timeout)
1895 */
1896 mutex_lock(&watchdog_data_mutex);
1897 for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1898 /* Register our watchdog part */
1899 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1900 "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1901 data->watchdog_miscdev.name = data->watchdog_name;
1902 data->watchdog_miscdev.fops = &watchdog_fops;
1903 data->watchdog_miscdev.minor = watchdog_minors[i];
1904
1905 err = misc_register(&data->watchdog_miscdev);
1906 if (err == -EBUSY)
1907 continue;
1908 if (err) {
1909 data->watchdog_miscdev.minor = 0;
1910 dev_err(&client->dev,
1911 "Registering watchdog chardev: %d\n", err);
1912 break;
1913 }
1914
1915 list_add(&data->list, &watchdog_data_list);
1916
1917 dev_info(&client->dev,
1918 "Registered watchdog chardev major 10, minor: %d\n",
1919 watchdog_minors[i]);
1920 break;
1921 }
1922 if (i == ARRAY_SIZE(watchdog_minors)) {
1923 data->watchdog_miscdev.minor = 0;
1924 dev_warn(&client->dev, "Couldn't register watchdog chardev "
1925 "(due to no free minor)\n");
1926 }
1927
1928 mutex_unlock(&watchdog_data_mutex);
1929
1930 return 0;
1931
1932 /* Unregister hwmon device */
1933
1934 exit_devunreg:
1935
1936 hwmon_device_unregister(data->hwmon_dev);
1937
1938 /* Unregister sysfs hooks */
1939
1940 exit_remove:
1941 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1942 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1943
1944 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1945 device_remove_file(dev, &sda_single_files[i].dev_attr);
1946
1947 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1948 device_remove_file(dev, &w83793_vid[i].dev_attr);
1949
1950 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1951 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1952
1953 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1954 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1955
1956 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1957 device_remove_file(dev, &w83793_temp[i].dev_attr);
1958
1959 if (data->lm75[0] != NULL)
1960 i2c_unregister_device(data->lm75[0]);
1961 if (data->lm75[1] != NULL)
1962 i2c_unregister_device(data->lm75[1]);
1963 free_mem:
1964 kfree(data);
1965 exit:
1966 return err;
1967 }
1968
1969 static void w83793_update_nonvolatile(struct device *dev)
1970 {
1971 struct i2c_client *client = to_i2c_client(dev);
1972 struct w83793_data *data = i2c_get_clientdata(client);
1973 int i, j;
1974 /*
1975 * They are somewhat "stable" registers, and to update them every time
1976 * takes so much time, it's just not worthy. Update them in a long
1977 * interval to avoid exception.
1978 */
1979 if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1980 || !data->valid))
1981 return;
1982 /* update voltage limits */
1983 for (i = 1; i < 3; i++) {
1984 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1985 data->in[j][i] =
1986 w83793_read_value(client, W83793_REG_IN[j][i]);
1987 }
1988 data->in_low_bits[i] =
1989 w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1990 }
1991
1992 for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1993 /* Update the Fan measured value and limits */
1994 if (!(data->has_fan & (1 << i)))
1995 continue;
1996 data->fan_min[i] =
1997 w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1998 data->fan_min[i] |=
1999 w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
2000 }
2001
2002 for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
2003 if (!(data->has_temp & (1 << i)))
2004 continue;
2005 data->temp_fan_map[i] =
2006 w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
2007 for (j = 1; j < 5; j++) {
2008 data->temp[i][j] =
2009 w83793_read_value(client, W83793_REG_TEMP[i][j]);
2010 }
2011 data->temp_cruise[i] =
2012 w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2013 for (j = 0; j < 7; j++) {
2014 data->sf2_pwm[i][j] =
2015 w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2016 data->sf2_temp[i][j] =
2017 w83793_read_value(client,
2018 W83793_REG_SF2_TEMP(i, j));
2019 }
2020 }
2021
2022 for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2023 data->temp_mode[i] =
2024 w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2025
2026 for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2027 data->tolerance[i] =
2028 w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2029 }
2030
2031 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2032 if (!(data->has_pwm & (1 << i)))
2033 continue;
2034 data->pwm[i][PWM_NONSTOP] =
2035 w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2036 data->pwm[i][PWM_START] =
2037 w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2038 data->pwm_stop_time[i] =
2039 w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2040 }
2041
2042 data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2043 data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2044 data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2045 data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2046 data->temp_critical =
2047 w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2048 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2049
2050 for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2051 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2052
2053 data->last_nonvolatile = jiffies;
2054 }
2055
2056 static struct w83793_data *w83793_update_device(struct device *dev)
2057 {
2058 struct i2c_client *client = to_i2c_client(dev);
2059 struct w83793_data *data = i2c_get_clientdata(client);
2060 int i;
2061
2062 mutex_lock(&data->update_lock);
2063
2064 if (!(time_after(jiffies, data->last_updated + HZ * 2)
2065 || !data->valid))
2066 goto END;
2067
2068 /* Update the voltages measured value and limits */
2069 for (i = 0; i < ARRAY_SIZE(data->in); i++)
2070 data->in[i][IN_READ] =
2071 w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2072
2073 data->in_low_bits[IN_READ] =
2074 w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2075
2076 for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2077 if (!(data->has_fan & (1 << i)))
2078 continue;
2079 data->fan[i] =
2080 w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2081 data->fan[i] |=
2082 w83793_read_value(client, W83793_REG_FAN(i) + 1);
2083 }
2084
2085 for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2086 if (!(data->has_temp & (1 << i)))
2087 continue;
2088 data->temp[i][TEMP_READ] =
2089 w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2090 }
2091
2092 data->temp_low_bits =
2093 w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2094
2095 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2096 if (data->has_pwm & (1 << i))
2097 data->pwm[i][PWM_DUTY] =
2098 w83793_read_value(client,
2099 W83793_REG_PWM(i, PWM_DUTY));
2100 }
2101
2102 for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2103 data->alarms[i] =
2104 w83793_read_value(client, W83793_REG_ALARM(i));
2105 if (data->has_vid & 0x01)
2106 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2107 if (data->has_vid & 0x02)
2108 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2109 w83793_update_nonvolatile(dev);
2110 data->last_updated = jiffies;
2111 data->valid = 1;
2112
2113 END:
2114 mutex_unlock(&data->update_lock);
2115 return data;
2116 }
2117
2118 /*
2119 * Ignore the possibility that somebody change bank outside the driver
2120 * Must be called with data->update_lock held, except during initialization
2121 */
2122 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2123 {
2124 struct w83793_data *data = i2c_get_clientdata(client);
2125 u8 res = 0xff;
2126 u8 new_bank = reg >> 8;
2127
2128 new_bank |= data->bank & 0xfc;
2129 if (data->bank != new_bank) {
2130 if (i2c_smbus_write_byte_data
2131 (client, W83793_REG_BANKSEL, new_bank) >= 0)
2132 data->bank = new_bank;
2133 else {
2134 dev_err(&client->dev,
2135 "set bank to %d failed, fall back "
2136 "to bank %d, read reg 0x%x error\n",
2137 new_bank, data->bank, reg);
2138 res = 0x0; /* read 0x0 from the chip */
2139 goto END;
2140 }
2141 }
2142 res = i2c_smbus_read_byte_data(client, reg & 0xff);
2143 END:
2144 return res;
2145 }
2146
2147 /* Must be called with data->update_lock held, except during initialization */
2148 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2149 {
2150 struct w83793_data *data = i2c_get_clientdata(client);
2151 int res;
2152 u8 new_bank = reg >> 8;
2153
2154 new_bank |= data->bank & 0xfc;
2155 if (data->bank != new_bank) {
2156 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2157 new_bank);
2158 if (res < 0) {
2159 dev_err(&client->dev,
2160 "set bank to %d failed, fall back "
2161 "to bank %d, write reg 0x%x error\n",
2162 new_bank, data->bank, reg);
2163 goto END;
2164 }
2165 data->bank = new_bank;
2166 }
2167
2168 res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2169 END:
2170 return res;
2171 }
2172
2173 module_i2c_driver(w83793_driver);
2174
2175 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2176 MODULE_DESCRIPTION("w83793 driver");
2177 MODULE_LICENSE("GPL");
Linux 2.6 libata-dev (mirror)