watchdog: nowayout is bool
[linux-2.6.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 any value to clear chassis alarm */
446 static ssize_t
447 store_chassis_clear_legacy(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         u8 val;
454
455         dev_warn(dev, "Attribute chassis is deprecated, "
456                  "use intrusion0_alarm instead\n");
457
458         mutex_lock(&data->update_lock);
459         val = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
460         val |= 0x80;
461         w83793_write_value(client, W83793_REG_CLR_CHASSIS, val);
462         mutex_unlock(&data->update_lock);
463         return count;
464 }
465
466 /* Write 0 to clear chassis alarm */
467 static ssize_t
468 store_chassis_clear(struct device *dev,
469                     struct device_attribute *attr, const char *buf,
470                     size_t count)
471 {
472         struct i2c_client *client = to_i2c_client(dev);
473         struct w83793_data *data = i2c_get_clientdata(client);
474         unsigned long val;
475         u8 reg;
476         int err;
477
478         err = kstrtoul(buf, 10, &val);
479         if (err)
480                 return err;
481         if (val)
482                 return -EINVAL;
483
484         mutex_lock(&data->update_lock);
485         reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
486         w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
487         data->valid = 0;                /* Force cache refresh */
488         mutex_unlock(&data->update_lock);
489         return count;
490 }
491
492 #define FAN_INPUT                       0
493 #define FAN_MIN                         1
494 static ssize_t
495 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
496 {
497         struct sensor_device_attribute_2 *sensor_attr =
498             to_sensor_dev_attr_2(attr);
499         int nr = sensor_attr->nr;
500         int index = sensor_attr->index;
501         struct w83793_data *data = w83793_update_device(dev);
502         u16 val;
503
504         if (nr == FAN_INPUT)
505                 val = data->fan[index] & 0x0fff;
506         else
507                 val = data->fan_min[index] & 0x0fff;
508
509         return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
510 }
511
512 static ssize_t
513 store_fan_min(struct device *dev, struct device_attribute *attr,
514               const char *buf, size_t count)
515 {
516         struct sensor_device_attribute_2 *sensor_attr =
517             to_sensor_dev_attr_2(attr);
518         int index = sensor_attr->index;
519         struct i2c_client *client = to_i2c_client(dev);
520         struct w83793_data *data = i2c_get_clientdata(client);
521         unsigned long val;
522         int err;
523
524         err = kstrtoul(buf, 10, &val);
525         if (err)
526                 return err;
527         val = FAN_TO_REG(val);
528
529         mutex_lock(&data->update_lock);
530         data->fan_min[index] = val;
531         w83793_write_value(client, W83793_REG_FAN_MIN(index),
532                            (val >> 8) & 0xff);
533         w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
534         mutex_unlock(&data->update_lock);
535
536         return count;
537 }
538
539 static ssize_t
540 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
541 {
542         struct sensor_device_attribute_2 *sensor_attr =
543             to_sensor_dev_attr_2(attr);
544         struct w83793_data *data = w83793_update_device(dev);
545         u16 val;
546         int nr = sensor_attr->nr;
547         int index = sensor_attr->index;
548
549         if (nr == PWM_STOP_TIME)
550                 val = TIME_FROM_REG(data->pwm_stop_time[index]);
551         else
552                 val = (data->pwm[index][nr] & 0x3f) << 2;
553
554         return sprintf(buf, "%d\n", val);
555 }
556
557 static ssize_t
558 store_pwm(struct device *dev, struct device_attribute *attr,
559           const char *buf, size_t count)
560 {
561         struct i2c_client *client = to_i2c_client(dev);
562         struct w83793_data *data = i2c_get_clientdata(client);
563         struct sensor_device_attribute_2 *sensor_attr =
564             to_sensor_dev_attr_2(attr);
565         int nr = sensor_attr->nr;
566         int index = sensor_attr->index;
567         unsigned long val;
568         int err;
569
570         err = kstrtoul(buf, 10, &val);
571         if (err)
572                 return err;
573
574         mutex_lock(&data->update_lock);
575         if (nr == PWM_STOP_TIME) {
576                 val = TIME_TO_REG(val);
577                 data->pwm_stop_time[index] = val;
578                 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
579                                    val);
580         } else {
581                 val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
582                 data->pwm[index][nr] =
583                     w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
584                 data->pwm[index][nr] |= val;
585                 w83793_write_value(client, W83793_REG_PWM(index, nr),
586                                                         data->pwm[index][nr]);
587         }
588
589         mutex_unlock(&data->update_lock);
590         return count;
591 }
592
593 static ssize_t
594 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
595 {
596         struct sensor_device_attribute_2 *sensor_attr =
597             to_sensor_dev_attr_2(attr);
598         int nr = sensor_attr->nr;
599         int index = sensor_attr->index;
600         struct w83793_data *data = w83793_update_device(dev);
601         long temp = TEMP_FROM_REG(data->temp[index][nr]);
602
603         if (nr == TEMP_READ && index < 4) {     /* Only TD1-TD4 have low bits */
604                 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
605                 temp += temp > 0 ? low : -low;
606         }
607         return sprintf(buf, "%ld\n", temp);
608 }
609
610 static ssize_t
611 store_temp(struct device *dev, struct device_attribute *attr,
612            const char *buf, size_t count)
613 {
614         struct sensor_device_attribute_2 *sensor_attr =
615             to_sensor_dev_attr_2(attr);
616         int nr = sensor_attr->nr;
617         int index = sensor_attr->index;
618         struct i2c_client *client = to_i2c_client(dev);
619         struct w83793_data *data = i2c_get_clientdata(client);
620         long tmp;
621         int err;
622
623         err = kstrtol(buf, 10, &tmp);
624         if (err)
625                 return err;
626
627         mutex_lock(&data->update_lock);
628         data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
629         w83793_write_value(client, W83793_REG_TEMP[index][nr],
630                            data->temp[index][nr]);
631         mutex_unlock(&data->update_lock);
632         return count;
633 }
634
635 /*
636  * TD1-TD4
637  * each has 4 mode:(2 bits)
638  * 0:   Stop monitor
639  * 1:   Use internal temp sensor(default)
640  * 2:   Reserved
641  * 3:   Use sensor in Intel CPU and get result by PECI
642  *
643  * TR1-TR2
644  * each has 2 mode:(1 bit)
645  * 0:   Disable temp sensor monitor
646  * 1:   To enable temp sensors monitor
647  */
648
649 /* 0 disable, 6 PECI */
650 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
651
652 static ssize_t
653 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
654 {
655         struct w83793_data *data = w83793_update_device(dev);
656         struct sensor_device_attribute_2 *sensor_attr =
657             to_sensor_dev_attr_2(attr);
658         int index = sensor_attr->index;
659         u8 mask = (index < 4) ? 0x03 : 0x01;
660         u8 shift = (index < 4) ? (2 * index) : (index - 4);
661         u8 tmp;
662         index = (index < 4) ? 0 : 1;
663
664         tmp = (data->temp_mode[index] >> shift) & mask;
665
666         /* for the internal sensor, found out if diode or thermistor */
667         if (tmp == 1)
668                 tmp = index == 0 ? 3 : 4;
669         else
670                 tmp = TO_TEMP_MODE[tmp];
671
672         return sprintf(buf, "%d\n", tmp);
673 }
674
675 static ssize_t
676 store_temp_mode(struct device *dev, struct device_attribute *attr,
677                 const char *buf, size_t count)
678 {
679         struct i2c_client *client = to_i2c_client(dev);
680         struct w83793_data *data = i2c_get_clientdata(client);
681         struct sensor_device_attribute_2 *sensor_attr =
682             to_sensor_dev_attr_2(attr);
683         int index = sensor_attr->index;
684         u8 mask = (index < 4) ? 0x03 : 0x01;
685         u8 shift = (index < 4) ? (2 * index) : (index - 4);
686         unsigned long val;
687         int err;
688
689         err = kstrtoul(buf, 10, &val);
690         if (err)
691                 return err;
692
693         /* transform the sysfs interface values into table above */
694         if ((val == 6) && (index < 4)) {
695                 val -= 3;
696         } else if ((val == 3 && index < 4)
697                 || (val == 4 && index >= 4)) {
698                 /* transform diode or thermistor into internal enable */
699                 val = !!val;
700         } else {
701                 return -EINVAL;
702         }
703
704         index = (index < 4) ? 0 : 1;
705         mutex_lock(&data->update_lock);
706         data->temp_mode[index] =
707             w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
708         data->temp_mode[index] &= ~(mask << shift);
709         data->temp_mode[index] |= val << shift;
710         w83793_write_value(client, W83793_REG_TEMP_MODE[index],
711                                                         data->temp_mode[index]);
712         mutex_unlock(&data->update_lock);
713
714         return count;
715 }
716
717 #define SETUP_PWM_DEFAULT               0
718 #define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
719 #define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
720 #define SETUP_TEMP_CRITICAL             3
721 static ssize_t
722 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
723 {
724         struct sensor_device_attribute_2 *sensor_attr =
725             to_sensor_dev_attr_2(attr);
726         int nr = sensor_attr->nr;
727         struct w83793_data *data = w83793_update_device(dev);
728         u32 val = 0;
729
730         if (nr == SETUP_PWM_DEFAULT)
731                 val = (data->pwm_default & 0x3f) << 2;
732         else if (nr == SETUP_PWM_UPTIME)
733                 val = TIME_FROM_REG(data->pwm_uptime);
734         else if (nr == SETUP_PWM_DOWNTIME)
735                 val = TIME_FROM_REG(data->pwm_downtime);
736         else if (nr == SETUP_TEMP_CRITICAL)
737                 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
738
739         return sprintf(buf, "%d\n", val);
740 }
741
742 static ssize_t
743 store_sf_setup(struct device *dev, struct device_attribute *attr,
744                const char *buf, size_t count)
745 {
746         struct sensor_device_attribute_2 *sensor_attr =
747             to_sensor_dev_attr_2(attr);
748         int nr = sensor_attr->nr;
749         struct i2c_client *client = to_i2c_client(dev);
750         struct w83793_data *data = i2c_get_clientdata(client);
751         long val;
752         int err;
753
754         err = kstrtol(buf, 10, &val);
755         if (err)
756                 return err;
757
758         mutex_lock(&data->update_lock);
759         if (nr == SETUP_PWM_DEFAULT) {
760                 data->pwm_default =
761                     w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
762                 data->pwm_default |= SENSORS_LIMIT(val, 0, 0xff) >> 2;
763                 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
764                                                         data->pwm_default);
765         } else if (nr == SETUP_PWM_UPTIME) {
766                 data->pwm_uptime = TIME_TO_REG(val);
767                 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
768                 w83793_write_value(client, W83793_REG_PWM_UPTIME,
769                                                         data->pwm_uptime);
770         } else if (nr == SETUP_PWM_DOWNTIME) {
771                 data->pwm_downtime = TIME_TO_REG(val);
772                 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
773                 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
774                                                         data->pwm_downtime);
775         } else {                /* SETUP_TEMP_CRITICAL */
776                 data->temp_critical =
777                     w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
778                 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
779                 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
780                                                         data->temp_critical);
781         }
782
783         mutex_unlock(&data->update_lock);
784         return count;
785 }
786
787 /*
788  * Temp SmartFan control
789  * TEMP_FAN_MAP
790  * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
791  * It's possible two or more temp channels control the same fan, w83793
792  * always prefers to pick the most critical request and applies it to
793  * the related Fan.
794  * It's possible one fan is not in any mapping of 6 temp channels, this
795  * means the fan is manual mode
796  *
797  * TEMP_PWM_ENABLE
798  * Each temp channel has its own SmartFan mode, and temp channel
799  * control fans that are set by TEMP_FAN_MAP
800  * 0:   SmartFanII mode
801  * 1:   Thermal Cruise Mode
802  *
803  * TEMP_CRUISE
804  * Target temperature in thermal cruise mode, w83793 will try to turn
805  * fan speed to keep the temperature of target device around this
806  * temperature.
807  *
808  * TEMP_TOLERANCE
809  * If Temp higher or lower than target with this tolerance, w83793
810  * will take actions to speed up or slow down the fan to keep the
811  * temperature within the tolerance range.
812  */
813
814 #define TEMP_FAN_MAP                    0
815 #define TEMP_PWM_ENABLE                 1
816 #define TEMP_CRUISE                     2
817 #define TEMP_TOLERANCE                  3
818 static ssize_t
819 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
820 {
821         struct sensor_device_attribute_2 *sensor_attr =
822             to_sensor_dev_attr_2(attr);
823         int nr = sensor_attr->nr;
824         int index = sensor_attr->index;
825         struct w83793_data *data = w83793_update_device(dev);
826         u32 val;
827
828         if (nr == TEMP_FAN_MAP) {
829                 val = data->temp_fan_map[index];
830         } else if (nr == TEMP_PWM_ENABLE) {
831                 /* +2 to transfrom into 2 and 3 to conform with sysfs intf */
832                 val = ((data->pwm_enable >> index) & 0x01) + 2;
833         } else if (nr == TEMP_CRUISE) {
834                 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
835         } else {                /* TEMP_TOLERANCE */
836                 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
837                 val = TEMP_FROM_REG(val & 0x0f);
838         }
839         return sprintf(buf, "%d\n", val);
840 }
841
842 static ssize_t
843 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
844               const char *buf, size_t count)
845 {
846         struct sensor_device_attribute_2 *sensor_attr =
847             to_sensor_dev_attr_2(attr);
848         int nr = sensor_attr->nr;
849         int index = sensor_attr->index;
850         struct i2c_client *client = to_i2c_client(dev);
851         struct w83793_data *data = i2c_get_clientdata(client);
852         long val;
853         int err;
854
855         err = kstrtol(buf, 10, &val);
856         if (err)
857                 return err;
858
859         mutex_lock(&data->update_lock);
860         if (nr == TEMP_FAN_MAP) {
861                 val = SENSORS_LIMIT(val, 0, 255);
862                 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
863                 data->temp_fan_map[index] = val;
864         } else if (nr == TEMP_PWM_ENABLE) {
865                 if (val == 2 || val == 3) {
866                         data->pwm_enable =
867                             w83793_read_value(client, W83793_REG_PWM_ENABLE);
868                         if (val - 2)
869                                 data->pwm_enable |= 1 << index;
870                         else
871                                 data->pwm_enable &= ~(1 << index);
872                         w83793_write_value(client, W83793_REG_PWM_ENABLE,
873                                                         data->pwm_enable);
874                 } else {
875                         mutex_unlock(&data->update_lock);
876                         return -EINVAL;
877                 }
878         } else if (nr == TEMP_CRUISE) {
879                 data->temp_cruise[index] =
880                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
881                 data->temp_cruise[index] &= 0x80;
882                 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
883
884                 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
885                                                 data->temp_cruise[index]);
886         } else {                /* TEMP_TOLERANCE */
887                 int i = index >> 1;
888                 u8 shift = (index & 0x01) ? 4 : 0;
889                 data->tolerance[i] =
890                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
891
892                 data->tolerance[i] &= ~(0x0f << shift);
893                 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
894                 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
895                                                         data->tolerance[i]);
896         }
897
898         mutex_unlock(&data->update_lock);
899         return count;
900 }
901
902 static ssize_t
903 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
904 {
905         struct sensor_device_attribute_2 *sensor_attr =
906             to_sensor_dev_attr_2(attr);
907         int nr = sensor_attr->nr;
908         int index = sensor_attr->index;
909         struct w83793_data *data = w83793_update_device(dev);
910
911         return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
912 }
913
914 static ssize_t
915 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
916               const char *buf, size_t count)
917 {
918         struct i2c_client *client = to_i2c_client(dev);
919         struct w83793_data *data = i2c_get_clientdata(client);
920         struct sensor_device_attribute_2 *sensor_attr =
921             to_sensor_dev_attr_2(attr);
922         int nr = sensor_attr->nr;
923         int index = sensor_attr->index;
924         unsigned long val;
925         int err;
926
927         err = kstrtoul(buf, 10, &val);
928         if (err)
929                 return err;
930         val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
931
932         mutex_lock(&data->update_lock);
933         data->sf2_pwm[index][nr] =
934             w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
935         data->sf2_pwm[index][nr] |= val;
936         w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
937                                                 data->sf2_pwm[index][nr]);
938         mutex_unlock(&data->update_lock);
939         return count;
940 }
941
942 static ssize_t
943 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
944 {
945         struct sensor_device_attribute_2 *sensor_attr =
946             to_sensor_dev_attr_2(attr);
947         int nr = sensor_attr->nr;
948         int index = sensor_attr->index;
949         struct w83793_data *data = w83793_update_device(dev);
950
951         return sprintf(buf, "%ld\n",
952                        TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
953 }
954
955 static ssize_t
956 store_sf2_temp(struct device *dev, struct device_attribute *attr,
957                const char *buf, size_t count)
958 {
959         struct i2c_client *client = to_i2c_client(dev);
960         struct w83793_data *data = i2c_get_clientdata(client);
961         struct sensor_device_attribute_2 *sensor_attr =
962             to_sensor_dev_attr_2(attr);
963         int nr = sensor_attr->nr;
964         int index = sensor_attr->index;
965         long val;
966         int err;
967
968         err = kstrtol(buf, 10, &val);
969         if (err)
970                 return err;
971         val = TEMP_TO_REG(val, 0, 0x7f);
972
973         mutex_lock(&data->update_lock);
974         data->sf2_temp[index][nr] =
975             w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
976         data->sf2_temp[index][nr] |= val;
977         w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
978                                              data->sf2_temp[index][nr]);
979         mutex_unlock(&data->update_lock);
980         return count;
981 }
982
983 /* only Vcore A/B and Vtt have additional 2 bits precision */
984 static ssize_t
985 show_in(struct device *dev, struct device_attribute *attr, char *buf)
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 w83793_data *data = w83793_update_device(dev);
992         u16 val = data->in[index][nr];
993
994         if (index < 3) {
995                 val <<= 2;
996                 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
997         }
998         /* voltage inputs 5VDD and 5VSB needs 150mV offset */
999         val = val * scale_in[index] + scale_in_add[index];
1000         return sprintf(buf, "%d\n", val);
1001 }
1002
1003 static ssize_t
1004 store_in(struct device *dev, struct device_attribute *attr,
1005          const char *buf, size_t count)
1006 {
1007         struct sensor_device_attribute_2 *sensor_attr =
1008             to_sensor_dev_attr_2(attr);
1009         int nr = sensor_attr->nr;
1010         int index = sensor_attr->index;
1011         struct i2c_client *client = to_i2c_client(dev);
1012         struct w83793_data *data = i2c_get_clientdata(client);
1013         unsigned long val;
1014         int err;
1015
1016         err = kstrtoul(buf, 10, &val);
1017         if (err)
1018                 return err;
1019         val = (val + scale_in[index] / 2) / scale_in[index];
1020
1021         mutex_lock(&data->update_lock);
1022         if (index > 2) {
1023                 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
1024                 if (nr == 1 || nr == 2)
1025                         val -= scale_in_add[index] / scale_in[index];
1026                 val = SENSORS_LIMIT(val, 0, 255);
1027         } else {
1028                 val = SENSORS_LIMIT(val, 0, 0x3FF);
1029                 data->in_low_bits[nr] =
1030                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1031                 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1032                 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1033                 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1034                                                      data->in_low_bits[nr]);
1035                 val >>= 2;
1036         }
1037         data->in[index][nr] = val;
1038         w83793_write_value(client, W83793_REG_IN[index][nr],
1039                                                         data->in[index][nr]);
1040         mutex_unlock(&data->update_lock);
1041         return count;
1042 }
1043
1044 #define NOT_USED                        -1
1045
1046 #define SENSOR_ATTR_IN(index)                                           \
1047         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1048                 IN_READ, index),                                        \
1049         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1050                 store_in, IN_MAX, index),                               \
1051         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1052                 store_in, IN_LOW, index),                               \
1053         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1054                 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
1055         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1056                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1057                 index + ((index > 2) ? 1 : 0))
1058
1059 #define SENSOR_ATTR_FAN(index)                                          \
1060         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1061                 NULL, ALARM_STATUS, index + 17),                        \
1062         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1063                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
1064         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1065                 NULL, FAN_INPUT, index - 1),                            \
1066         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1067                 show_fan, store_fan_min, FAN_MIN, index - 1)
1068
1069 #define SENSOR_ATTR_PWM(index)                                          \
1070         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1071                 store_pwm, PWM_DUTY, index - 1),                        \
1072         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1073                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1074         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1075                 show_pwm, store_pwm, PWM_START, index - 1),             \
1076         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1077                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1078
1079 #define SENSOR_ATTR_TEMP(index)                                         \
1080         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1081                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1082         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1083                 NULL, TEMP_READ, index - 1),                            \
1084         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1085                 store_temp, TEMP_CRIT, index - 1),                      \
1086         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1087                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1088         SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1089                 store_temp, TEMP_WARN, index - 1),                      \
1090         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1091                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1092         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1093                 show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1094         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1095                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1096         SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1097                 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1098                 TEMP_FAN_MAP, index - 1),                               \
1099         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1100                 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1101                 index - 1),                                             \
1102         SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1103                 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1104         SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1105                 store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1106         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1107                 show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1108         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1109                 show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1110         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1111                 show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1112         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1113                 show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1114         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1115                 show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1116         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1117                 show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1118         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1119                 show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1120         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1121                 show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1122         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1123                 show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1124         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1125                 show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1126         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1127                 show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1128         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1129                 show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1130         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1131                 show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1132         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1133                 show_sf2_temp, store_sf2_temp, 6, index - 1)
1134
1135 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1136         SENSOR_ATTR_IN(0),
1137         SENSOR_ATTR_IN(1),
1138         SENSOR_ATTR_IN(2),
1139         SENSOR_ATTR_IN(3),
1140         SENSOR_ATTR_IN(4),
1141         SENSOR_ATTR_IN(5),
1142         SENSOR_ATTR_IN(6),
1143         SENSOR_ATTR_IN(7),
1144         SENSOR_ATTR_IN(8),
1145         SENSOR_ATTR_IN(9),
1146         SENSOR_ATTR_FAN(1),
1147         SENSOR_ATTR_FAN(2),
1148         SENSOR_ATTR_FAN(3),
1149         SENSOR_ATTR_FAN(4),
1150         SENSOR_ATTR_FAN(5),
1151         SENSOR_ATTR_PWM(1),
1152         SENSOR_ATTR_PWM(2),
1153         SENSOR_ATTR_PWM(3),
1154 };
1155
1156 static struct sensor_device_attribute_2 w83793_temp[] = {
1157         SENSOR_ATTR_TEMP(1),
1158         SENSOR_ATTR_TEMP(2),
1159         SENSOR_ATTR_TEMP(3),
1160         SENSOR_ATTR_TEMP(4),
1161         SENSOR_ATTR_TEMP(5),
1162         SENSOR_ATTR_TEMP(6),
1163 };
1164
1165 /* Fan6-Fan12 */
1166 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1167         SENSOR_ATTR_FAN(6),
1168         SENSOR_ATTR_FAN(7),
1169         SENSOR_ATTR_FAN(8),
1170         SENSOR_ATTR_FAN(9),
1171         SENSOR_ATTR_FAN(10),
1172         SENSOR_ATTR_FAN(11),
1173         SENSOR_ATTR_FAN(12),
1174 };
1175
1176 /* Pwm4-Pwm8 */
1177 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1178         SENSOR_ATTR_PWM(4),
1179         SENSOR_ATTR_PWM(5),
1180         SENSOR_ATTR_PWM(6),
1181         SENSOR_ATTR_PWM(7),
1182         SENSOR_ATTR_PWM(8),
1183 };
1184
1185 static struct sensor_device_attribute_2 w83793_vid[] = {
1186         SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1187         SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1188 };
1189 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
1190
1191 static struct sensor_device_attribute_2 sda_single_files[] = {
1192         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1193                       store_chassis_clear_legacy, ALARM_STATUS, 30),
1194         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1195                       store_chassis_clear, ALARM_STATUS, 30),
1196         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1197                       store_beep_enable, NOT_USED, NOT_USED),
1198         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1199                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1200         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1201                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1202         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1203                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1204         SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1205                       store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1206 };
1207
1208 static void w83793_init_client(struct i2c_client *client)
1209 {
1210         if (reset)
1211                 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1212
1213         /* Start monitoring */
1214         w83793_write_value(client, W83793_REG_CONFIG,
1215                            w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1216 }
1217
1218 /*
1219  * Watchdog routines
1220  */
1221
1222 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1223 {
1224         int ret, mtimeout;
1225
1226         mtimeout = DIV_ROUND_UP(timeout, 60);
1227
1228         if (mtimeout > 255)
1229                 return -EINVAL;
1230
1231         mutex_lock(&data->watchdog_lock);
1232         if (!data->client) {
1233                 ret = -ENODEV;
1234                 goto leave;
1235         }
1236
1237         data->watchdog_timeout = mtimeout;
1238
1239         /* Set Timeout value (in Minutes) */
1240         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1241                            data->watchdog_timeout);
1242
1243         ret = mtimeout * 60;
1244
1245 leave:
1246         mutex_unlock(&data->watchdog_lock);
1247         return ret;
1248 }
1249
1250 static int watchdog_get_timeout(struct w83793_data *data)
1251 {
1252         int timeout;
1253
1254         mutex_lock(&data->watchdog_lock);
1255         timeout = data->watchdog_timeout * 60;
1256         mutex_unlock(&data->watchdog_lock);
1257
1258         return timeout;
1259 }
1260
1261 static int watchdog_trigger(struct w83793_data *data)
1262 {
1263         int ret = 0;
1264
1265         mutex_lock(&data->watchdog_lock);
1266         if (!data->client) {
1267                 ret = -ENODEV;
1268                 goto leave;
1269         }
1270
1271         /* Set Timeout value (in Minutes) */
1272         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1273                            data->watchdog_timeout);
1274
1275 leave:
1276         mutex_unlock(&data->watchdog_lock);
1277         return ret;
1278 }
1279
1280 static int watchdog_enable(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         /* Set initial timeout */
1291         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1292                            data->watchdog_timeout);
1293
1294         /* Enable Soft Watchdog */
1295         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1296
1297 leave:
1298         mutex_unlock(&data->watchdog_lock);
1299         return ret;
1300 }
1301
1302 static int watchdog_disable(struct w83793_data *data)
1303 {
1304         int ret = 0;
1305
1306         mutex_lock(&data->watchdog_lock);
1307         if (!data->client) {
1308                 ret = -ENODEV;
1309                 goto leave;
1310         }
1311
1312         /* Disable Soft Watchdog */
1313         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1314
1315 leave:
1316         mutex_unlock(&data->watchdog_lock);
1317         return ret;
1318 }
1319
1320 static int watchdog_open(struct inode *inode, struct file *filp)
1321 {
1322         struct w83793_data *pos, *data = NULL;
1323         int watchdog_is_open;
1324
1325         /*
1326          * We get called from drivers/char/misc.c with misc_mtx hold, and we
1327          * call misc_register() from  w83793_probe() with watchdog_data_mutex
1328          * hold, as misc_register() takes the misc_mtx lock, this is a possible
1329          * deadlock, so we use mutex_trylock here.
1330          */
1331         if (!mutex_trylock(&watchdog_data_mutex))
1332                 return -ERESTARTSYS;
1333         list_for_each_entry(pos, &watchdog_data_list, list) {
1334                 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1335                         data = pos;
1336                         break;
1337                 }
1338         }
1339
1340         /* Check, if device is already open */
1341         watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1342
1343         /*
1344          * Increase data reference counter (if not already done).
1345          * Note we can never not have found data, so we don't check for this
1346          */
1347         if (!watchdog_is_open)
1348                 kref_get(&data->kref);
1349
1350         mutex_unlock(&watchdog_data_mutex);
1351
1352         /* Check, if device is already open and possibly issue error */
1353         if (watchdog_is_open)
1354                 return -EBUSY;
1355
1356         /* Enable Soft Watchdog */
1357         watchdog_enable(data);
1358
1359         /* Store pointer to data into filp's private data */
1360         filp->private_data = data;
1361
1362         return nonseekable_open(inode, filp);
1363 }
1364
1365 static int watchdog_close(struct inode *inode, struct file *filp)
1366 {
1367         struct w83793_data *data = filp->private_data;
1368
1369         if (data->watchdog_expect_close) {
1370                 watchdog_disable(data);
1371                 data->watchdog_expect_close = 0;
1372         } else {
1373                 watchdog_trigger(data);
1374                 dev_crit(&data->client->dev,
1375                         "unexpected close, not stopping watchdog!\n");
1376         }
1377
1378         clear_bit(0, &data->watchdog_is_open);
1379
1380         /* Decrease data reference counter */
1381         mutex_lock(&watchdog_data_mutex);
1382         kref_put(&data->kref, w83793_release_resources);
1383         mutex_unlock(&watchdog_data_mutex);
1384
1385         return 0;
1386 }
1387
1388 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1389         size_t count, loff_t *offset)
1390 {
1391         ssize_t ret;
1392         struct w83793_data *data = filp->private_data;
1393
1394         if (count) {
1395                 if (!nowayout) {
1396                         size_t i;
1397
1398                         /* Clear it in case it was set with a previous write */
1399                         data->watchdog_expect_close = 0;
1400
1401                         for (i = 0; i != count; i++) {
1402                                 char c;
1403                                 if (get_user(c, buf + i))
1404                                         return -EFAULT;
1405                                 if (c == 'V')
1406                                         data->watchdog_expect_close = 1;
1407                         }
1408                 }
1409                 ret = watchdog_trigger(data);
1410                 if (ret < 0)
1411                         return ret;
1412         }
1413         return count;
1414 }
1415
1416 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1417                            unsigned long arg)
1418 {
1419         struct watchdog_info ident = {
1420                 .options = WDIOF_KEEPALIVEPING |
1421                            WDIOF_SETTIMEOUT |
1422                            WDIOF_CARDRESET,
1423                 .identity = "w83793 watchdog"
1424         };
1425
1426         int val, ret = 0;
1427         struct w83793_data *data = filp->private_data;
1428
1429         switch (cmd) {
1430         case WDIOC_GETSUPPORT:
1431                 if (!nowayout)
1432                         ident.options |= WDIOF_MAGICCLOSE;
1433                 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1434                         ret = -EFAULT;
1435                 break;
1436
1437         case WDIOC_GETSTATUS:
1438                 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1439                 ret = put_user(val, (int __user *)arg);
1440                 break;
1441
1442         case WDIOC_GETBOOTSTATUS:
1443                 ret = put_user(0, (int __user *)arg);
1444                 break;
1445
1446         case WDIOC_KEEPALIVE:
1447                 ret = watchdog_trigger(data);
1448                 break;
1449
1450         case WDIOC_GETTIMEOUT:
1451                 val = watchdog_get_timeout(data);
1452                 ret = put_user(val, (int __user *)arg);
1453                 break;
1454
1455         case WDIOC_SETTIMEOUT:
1456                 if (get_user(val, (int __user *)arg)) {
1457                         ret = -EFAULT;
1458                         break;
1459                 }
1460                 ret = watchdog_set_timeout(data, val);
1461                 if (ret > 0)
1462                         ret = put_user(ret, (int __user *)arg);
1463                 break;
1464
1465         case WDIOC_SETOPTIONS:
1466                 if (get_user(val, (int __user *)arg)) {
1467                         ret = -EFAULT;
1468                         break;
1469                 }
1470
1471                 if (val & WDIOS_DISABLECARD)
1472                         ret = watchdog_disable(data);
1473                 else if (val & WDIOS_ENABLECARD)
1474                         ret = watchdog_enable(data);
1475                 else
1476                         ret = -EINVAL;
1477
1478                 break;
1479         default:
1480                 ret = -ENOTTY;
1481         }
1482         return ret;
1483 }
1484
1485 static const struct file_operations watchdog_fops = {
1486         .owner = THIS_MODULE,
1487         .llseek = no_llseek,
1488         .open = watchdog_open,
1489         .release = watchdog_close,
1490         .write = watchdog_write,
1491         .unlocked_ioctl = watchdog_ioctl,
1492 };
1493
1494 /*
1495  *      Notifier for system down
1496  */
1497
1498 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1499                                void *unused)
1500 {
1501         struct w83793_data *data = NULL;
1502
1503         if (code == SYS_DOWN || code == SYS_HALT) {
1504
1505                 /* Disable each registered watchdog */
1506                 mutex_lock(&watchdog_data_mutex);
1507                 list_for_each_entry(data, &watchdog_data_list, list) {
1508                         if (data->watchdog_miscdev.minor)
1509                                 watchdog_disable(data);
1510                 }
1511                 mutex_unlock(&watchdog_data_mutex);
1512         }
1513
1514         return NOTIFY_DONE;
1515 }
1516
1517 /*
1518  *      The WDT needs to learn about soft shutdowns in order to
1519  *      turn the timebomb registers off.
1520  */
1521
1522 static struct notifier_block watchdog_notifier = {
1523         .notifier_call = watchdog_notify_sys,
1524 };
1525
1526 /*
1527  * Init / remove routines
1528  */
1529
1530 static int w83793_remove(struct i2c_client *client)
1531 {
1532         struct w83793_data *data = i2c_get_clientdata(client);
1533         struct device *dev = &client->dev;
1534         int i, tmp;
1535
1536         /* Unregister the watchdog (if registered) */
1537         if (data->watchdog_miscdev.minor) {
1538                 misc_deregister(&data->watchdog_miscdev);
1539
1540                 if (data->watchdog_is_open) {
1541                         dev_warn(&client->dev,
1542                                 "i2c client detached with watchdog open! "
1543                                 "Stopping watchdog.\n");
1544                         watchdog_disable(data);
1545                 }
1546
1547                 mutex_lock(&watchdog_data_mutex);
1548                 list_del(&data->list);
1549                 mutex_unlock(&watchdog_data_mutex);
1550
1551                 /* Tell the watchdog code the client is gone */
1552                 mutex_lock(&data->watchdog_lock);
1553                 data->client = NULL;
1554                 mutex_unlock(&data->watchdog_lock);
1555         }
1556
1557         /* Reset Configuration Register to Disable Watch Dog Registers */
1558         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1559         w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1560
1561         unregister_reboot_notifier(&watchdog_notifier);
1562
1563         hwmon_device_unregister(data->hwmon_dev);
1564
1565         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1566                 device_remove_file(dev,
1567                                    &w83793_sensor_attr_2[i].dev_attr);
1568
1569         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1570                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1571
1572         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1573                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1574         device_remove_file(dev, &dev_attr_vrm);
1575
1576         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1577                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1578
1579         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1580                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1581
1582         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1583                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1584
1585         if (data->lm75[0] != NULL)
1586                 i2c_unregister_device(data->lm75[0]);
1587         if (data->lm75[1] != NULL)
1588                 i2c_unregister_device(data->lm75[1]);
1589
1590         /* Decrease data reference counter */
1591         mutex_lock(&watchdog_data_mutex);
1592         kref_put(&data->kref, w83793_release_resources);
1593         mutex_unlock(&watchdog_data_mutex);
1594
1595         return 0;
1596 }
1597
1598 static int
1599 w83793_detect_subclients(struct i2c_client *client)
1600 {
1601         int i, id, err;
1602         int address = client->addr;
1603         u8 tmp;
1604         struct i2c_adapter *adapter = client->adapter;
1605         struct w83793_data *data = i2c_get_clientdata(client);
1606
1607         id = i2c_adapter_id(adapter);
1608         if (force_subclients[0] == id && force_subclients[1] == address) {
1609                 for (i = 2; i <= 3; i++) {
1610                         if (force_subclients[i] < 0x48
1611                             || force_subclients[i] > 0x4f) {
1612                                 dev_err(&client->dev,
1613                                         "invalid subclient "
1614                                         "address %d; must be 0x48-0x4f\n",
1615                                         force_subclients[i]);
1616                                 err = -EINVAL;
1617                                 goto ERROR_SC_0;
1618                         }
1619                 }
1620                 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1621                                    (force_subclients[2] & 0x07) |
1622                                    ((force_subclients[3] & 0x07) << 4));
1623         }
1624
1625         tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1626         if (!(tmp & 0x08))
1627                 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1628         if (!(tmp & 0x80)) {
1629                 if ((data->lm75[0] != NULL)
1630                     && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1631                         dev_err(&client->dev,
1632                                 "duplicate addresses 0x%x, "
1633                                 "use force_subclients\n", data->lm75[0]->addr);
1634                         err = -ENODEV;
1635                         goto ERROR_SC_1;
1636                 }
1637                 data->lm75[1] = i2c_new_dummy(adapter,
1638                                               0x48 + ((tmp >> 4) & 0x7));
1639         }
1640
1641         return 0;
1642
1643         /* Undo inits in case of errors */
1644
1645 ERROR_SC_1:
1646         if (data->lm75[0] != NULL)
1647                 i2c_unregister_device(data->lm75[0]);
1648 ERROR_SC_0:
1649         return err;
1650 }
1651
1652 /* Return 0 if detection is successful, -ENODEV otherwise */
1653 static int w83793_detect(struct i2c_client *client,
1654                          struct i2c_board_info *info)
1655 {
1656         u8 tmp, bank, chip_id;
1657         struct i2c_adapter *adapter = client->adapter;
1658         unsigned short address = client->addr;
1659
1660         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1661                 return -ENODEV;
1662
1663         bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1664
1665         tmp = bank & 0x80 ? 0x5c : 0xa3;
1666         /* Check Winbond vendor ID */
1667         if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1668                 pr_debug("w83793: Detection failed at check vendor id\n");
1669                 return -ENODEV;
1670         }
1671
1672         /*
1673          * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1674          * should match
1675          */
1676         if ((bank & 0x07) == 0
1677          && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1678             (address << 1)) {
1679                 pr_debug("w83793: Detection failed at check i2c addr\n");
1680                 return -ENODEV;
1681         }
1682
1683         /* Determine the chip type now */
1684         chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1685         if (chip_id != 0x7b)
1686                 return -ENODEV;
1687
1688         strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1689
1690         return 0;
1691 }
1692
1693 static int w83793_probe(struct i2c_client *client,
1694                         const struct i2c_device_id *id)
1695 {
1696         struct device *dev = &client->dev;
1697         const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1698         struct w83793_data *data;
1699         int i, tmp, val, err;
1700         int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1701         int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1702         int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1703
1704         data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1705         if (!data) {
1706                 err = -ENOMEM;
1707                 goto exit;
1708         }
1709
1710         i2c_set_clientdata(client, data);
1711         data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1712         mutex_init(&data->update_lock);
1713         mutex_init(&data->watchdog_lock);
1714         INIT_LIST_HEAD(&data->list);
1715         kref_init(&data->kref);
1716
1717         /*
1718          * Store client pointer in our data struct for watchdog usage
1719          * (where the client is found through a data ptr instead of the
1720          * otherway around)
1721          */
1722         data->client = client;
1723
1724         err = w83793_detect_subclients(client);
1725         if (err)
1726                 goto free_mem;
1727
1728         /* Initialize the chip */
1729         w83793_init_client(client);
1730
1731         /*
1732          * Only fan 1-5 has their own input pins,
1733          * Pwm 1-3 has their own pins
1734          */
1735         data->has_fan = 0x1f;
1736         data->has_pwm = 0x07;
1737         tmp = w83793_read_value(client, W83793_REG_MFC);
1738         val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1739
1740         /* check the function of pins 49-56 */
1741         if (tmp & 0x80) {
1742                 data->has_vid |= 0x2;   /* has VIDB */
1743         } else {
1744                 data->has_pwm |= 0x18;  /* pwm 4,5 */
1745                 if (val & 0x01) {       /* fan 6 */
1746                         data->has_fan |= 0x20;
1747                         data->has_pwm |= 0x20;
1748                 }
1749                 if (val & 0x02) {       /* fan 7 */
1750                         data->has_fan |= 0x40;
1751                         data->has_pwm |= 0x40;
1752                 }
1753                 if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1754                         data->has_fan |= 0x80;
1755                         data->has_pwm |= 0x80;
1756                 }
1757         }
1758
1759         /* check the function of pins 37-40 */
1760         if (!(tmp & 0x29))
1761                 data->has_vid |= 0x1;   /* has VIDA */
1762         if (0x08 == (tmp & 0x0c)) {
1763                 if (val & 0x08) /* fan 9 */
1764                         data->has_fan |= 0x100;
1765                 if (val & 0x10) /* fan 10 */
1766                         data->has_fan |= 0x200;
1767         }
1768         if (0x20 == (tmp & 0x30)) {
1769                 if (val & 0x20) /* fan 11 */
1770                         data->has_fan |= 0x400;
1771                 if (val & 0x40) /* fan 12 */
1772                         data->has_fan |= 0x800;
1773         }
1774
1775         if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1776                 data->has_fan |= 0x80;
1777                 data->has_pwm |= 0x80;
1778         }
1779
1780         tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1781         if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1782                 data->has_fan |= 0x100;
1783         }
1784         if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1785                 data->has_fan |= 0x200;
1786         }
1787         if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1788                 data->has_fan |= 0x400;
1789         }
1790         if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1791                 data->has_fan |= 0x800;
1792         }
1793
1794         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1795         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1796         if (tmp & 0x01)
1797                 data->has_temp |= 0x01;
1798         if (tmp & 0x04)
1799                 data->has_temp |= 0x02;
1800         if (tmp & 0x10)
1801                 data->has_temp |= 0x04;
1802         if (tmp & 0x40)
1803                 data->has_temp |= 0x08;
1804
1805         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1806         if (tmp & 0x01)
1807                 data->has_temp |= 0x10;
1808         if (tmp & 0x02)
1809                 data->has_temp |= 0x20;
1810
1811         /* Register sysfs hooks */
1812         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1813                 err = device_create_file(dev,
1814                                          &w83793_sensor_attr_2[i].dev_attr);
1815                 if (err)
1816                         goto exit_remove;
1817         }
1818
1819         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1820                 if (!(data->has_vid & (1 << i)))
1821                         continue;
1822                 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1823                 if (err)
1824                         goto exit_remove;
1825         }
1826         if (data->has_vid) {
1827                 data->vrm = vid_which_vrm();
1828                 err = device_create_file(dev, &dev_attr_vrm);
1829                 if (err)
1830                         goto exit_remove;
1831         }
1832
1833         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1834                 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1835                 if (err)
1836                         goto exit_remove;
1837
1838         }
1839
1840         for (i = 0; i < 6; i++) {
1841                 int j;
1842                 if (!(data->has_temp & (1 << i)))
1843                         continue;
1844                 for (j = 0; j < files_temp; j++) {
1845                         err = device_create_file(dev,
1846                                                 &w83793_temp[(i) * files_temp
1847                                                                 + j].dev_attr);
1848                         if (err)
1849                                 goto exit_remove;
1850                 }
1851         }
1852
1853         for (i = 5; i < 12; i++) {
1854                 int j;
1855                 if (!(data->has_fan & (1 << i)))
1856                         continue;
1857                 for (j = 0; j < files_fan; j++) {
1858                         err = device_create_file(dev,
1859                                            &w83793_left_fan[(i - 5) * files_fan
1860                                                                 + j].dev_attr);
1861                         if (err)
1862                                 goto exit_remove;
1863                 }
1864         }
1865
1866         for (i = 3; i < 8; i++) {
1867                 int j;
1868                 if (!(data->has_pwm & (1 << i)))
1869                         continue;
1870                 for (j = 0; j < files_pwm; j++) {
1871                         err = device_create_file(dev,
1872                                            &w83793_left_pwm[(i - 3) * files_pwm
1873                                                                 + j].dev_attr);
1874                         if (err)
1875                                 goto exit_remove;
1876                 }
1877         }
1878
1879         data->hwmon_dev = hwmon_device_register(dev);
1880         if (IS_ERR(data->hwmon_dev)) {
1881                 err = PTR_ERR(data->hwmon_dev);
1882                 goto exit_remove;
1883         }
1884
1885         /* Watchdog initialization */
1886
1887         /* Register boot notifier */
1888         err = register_reboot_notifier(&watchdog_notifier);
1889         if (err != 0) {
1890                 dev_err(&client->dev,
1891                         "cannot register reboot notifier (err=%d)\n", err);
1892                 goto exit_devunreg;
1893         }
1894
1895         /*
1896          * Enable Watchdog registers.
1897          * Set Configuration Register to Enable Watch Dog Registers
1898          * (Bit 2) = XXXX, X1XX.
1899          */
1900         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1901         w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1902
1903         /* Set the default watchdog timeout */
1904         data->watchdog_timeout = timeout;
1905
1906         /* Check, if last reboot was caused by watchdog */
1907         data->watchdog_caused_reboot =
1908           w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1909
1910         /* Disable Soft Watchdog during initialiation */
1911         watchdog_disable(data);
1912
1913         /*
1914          * We take the data_mutex lock early so that watchdog_open() cannot
1915          * run when misc_register() has completed, but we've not yet added
1916          * our data to the watchdog_data_list (and set the default timeout)
1917          */
1918         mutex_lock(&watchdog_data_mutex);
1919         for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1920                 /* Register our watchdog part */
1921                 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1922                         "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1923                 data->watchdog_miscdev.name = data->watchdog_name;
1924                 data->watchdog_miscdev.fops = &watchdog_fops;
1925                 data->watchdog_miscdev.minor = watchdog_minors[i];
1926
1927                 err = misc_register(&data->watchdog_miscdev);
1928                 if (err == -EBUSY)
1929                         continue;
1930                 if (err) {
1931                         data->watchdog_miscdev.minor = 0;
1932                         dev_err(&client->dev,
1933                                 "Registering watchdog chardev: %d\n", err);
1934                         break;
1935                 }
1936
1937                 list_add(&data->list, &watchdog_data_list);
1938
1939                 dev_info(&client->dev,
1940                         "Registered watchdog chardev major 10, minor: %d\n",
1941                         watchdog_minors[i]);
1942                 break;
1943         }
1944         if (i == ARRAY_SIZE(watchdog_minors)) {
1945                 data->watchdog_miscdev.minor = 0;
1946                 dev_warn(&client->dev, "Couldn't register watchdog chardev "
1947                         "(due to no free minor)\n");
1948         }
1949
1950         mutex_unlock(&watchdog_data_mutex);
1951
1952         return 0;
1953
1954         /* Unregister hwmon device */
1955
1956 exit_devunreg:
1957
1958         hwmon_device_unregister(data->hwmon_dev);
1959
1960         /* Unregister sysfs hooks */
1961
1962 exit_remove:
1963         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1964                 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1965
1966         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1967                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1968
1969         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1970                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1971
1972         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1973                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1974
1975         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1976                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1977
1978         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1979                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1980
1981         if (data->lm75[0] != NULL)
1982                 i2c_unregister_device(data->lm75[0]);
1983         if (data->lm75[1] != NULL)
1984                 i2c_unregister_device(data->lm75[1]);
1985 free_mem:
1986         kfree(data);
1987 exit:
1988         return err;
1989 }
1990
1991 static void w83793_update_nonvolatile(struct device *dev)
1992 {
1993         struct i2c_client *client = to_i2c_client(dev);
1994         struct w83793_data *data = i2c_get_clientdata(client);
1995         int i, j;
1996         /*
1997          * They are somewhat "stable" registers, and to update them every time
1998          * takes so much time, it's just not worthy. Update them in a long
1999          * interval to avoid exception.
2000          */
2001         if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
2002               || !data->valid))
2003                 return;
2004         /* update voltage limits */
2005         for (i = 1; i < 3; i++) {
2006                 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
2007                         data->in[j][i] =
2008                             w83793_read_value(client, W83793_REG_IN[j][i]);
2009                 }
2010                 data->in_low_bits[i] =
2011                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
2012         }
2013
2014         for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
2015                 /* Update the Fan measured value and limits */
2016                 if (!(data->has_fan & (1 << i)))
2017                         continue;
2018                 data->fan_min[i] =
2019                     w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
2020                 data->fan_min[i] |=
2021                     w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
2022         }
2023
2024         for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
2025                 if (!(data->has_temp & (1 << i)))
2026                         continue;
2027                 data->temp_fan_map[i] =
2028                     w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
2029                 for (j = 1; j < 5; j++) {
2030                         data->temp[i][j] =
2031                             w83793_read_value(client, W83793_REG_TEMP[i][j]);
2032                 }
2033                 data->temp_cruise[i] =
2034                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2035                 for (j = 0; j < 7; j++) {
2036                         data->sf2_pwm[i][j] =
2037                             w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2038                         data->sf2_temp[i][j] =
2039                             w83793_read_value(client,
2040                                               W83793_REG_SF2_TEMP(i, j));
2041                 }
2042         }
2043
2044         for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2045                 data->temp_mode[i] =
2046                     w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2047
2048         for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2049                 data->tolerance[i] =
2050                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2051         }
2052
2053         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2054                 if (!(data->has_pwm & (1 << i)))
2055                         continue;
2056                 data->pwm[i][PWM_NONSTOP] =
2057                     w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2058                 data->pwm[i][PWM_START] =
2059                     w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2060                 data->pwm_stop_time[i] =
2061                     w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2062         }
2063
2064         data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2065         data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2066         data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2067         data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2068         data->temp_critical =
2069             w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2070         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2071
2072         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2073                 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2074
2075         data->last_nonvolatile = jiffies;
2076 }
2077
2078 static struct w83793_data *w83793_update_device(struct device *dev)
2079 {
2080         struct i2c_client *client = to_i2c_client(dev);
2081         struct w83793_data *data = i2c_get_clientdata(client);
2082         int i;
2083
2084         mutex_lock(&data->update_lock);
2085
2086         if (!(time_after(jiffies, data->last_updated + HZ * 2)
2087               || !data->valid))
2088                 goto END;
2089
2090         /* Update the voltages measured value and limits */
2091         for (i = 0; i < ARRAY_SIZE(data->in); i++)
2092                 data->in[i][IN_READ] =
2093                     w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2094
2095         data->in_low_bits[IN_READ] =
2096             w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2097
2098         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2099                 if (!(data->has_fan & (1 << i)))
2100                         continue;
2101                 data->fan[i] =
2102                     w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2103                 data->fan[i] |=
2104                     w83793_read_value(client, W83793_REG_FAN(i) + 1);
2105         }
2106
2107         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2108                 if (!(data->has_temp & (1 << i)))
2109                         continue;
2110                 data->temp[i][TEMP_READ] =
2111                     w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2112         }
2113
2114         data->temp_low_bits =
2115             w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2116
2117         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2118                 if (data->has_pwm & (1 << i))
2119                         data->pwm[i][PWM_DUTY] =
2120                             w83793_read_value(client,
2121                                               W83793_REG_PWM(i, PWM_DUTY));
2122         }
2123
2124         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2125                 data->alarms[i] =
2126                     w83793_read_value(client, W83793_REG_ALARM(i));
2127         if (data->has_vid & 0x01)
2128                 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2129         if (data->has_vid & 0x02)
2130                 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2131         w83793_update_nonvolatile(dev);
2132         data->last_updated = jiffies;
2133         data->valid = 1;
2134
2135 END:
2136         mutex_unlock(&data->update_lock);
2137         return data;
2138 }
2139
2140 /*
2141  * Ignore the possibility that somebody change bank outside the driver
2142  * Must be called with data->update_lock held, except during initialization
2143  */
2144 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2145 {
2146         struct w83793_data *data = i2c_get_clientdata(client);
2147         u8 res = 0xff;
2148         u8 new_bank = reg >> 8;
2149
2150         new_bank |= data->bank & 0xfc;
2151         if (data->bank != new_bank) {
2152                 if (i2c_smbus_write_byte_data
2153                     (client, W83793_REG_BANKSEL, new_bank) >= 0)
2154                         data->bank = new_bank;
2155                 else {
2156                         dev_err(&client->dev,
2157                                 "set bank to %d failed, fall back "
2158                                 "to bank %d, read reg 0x%x error\n",
2159                                 new_bank, data->bank, reg);
2160                         res = 0x0;      /* read 0x0 from the chip */
2161                         goto END;
2162                 }
2163         }
2164         res = i2c_smbus_read_byte_data(client, reg & 0xff);
2165 END:
2166         return res;
2167 }
2168
2169 /* Must be called with data->update_lock held, except during initialization */
2170 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2171 {
2172         struct w83793_data *data = i2c_get_clientdata(client);
2173         int res;
2174         u8 new_bank = reg >> 8;
2175
2176         new_bank |= data->bank & 0xfc;
2177         if (data->bank != new_bank) {
2178                 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2179                                                 new_bank);
2180                 if (res < 0) {
2181                         dev_err(&client->dev,
2182                                 "set bank to %d failed, fall back "
2183                                 "to bank %d, write reg 0x%x error\n",
2184                                 new_bank, data->bank, reg);
2185                         goto END;
2186                 }
2187                 data->bank = new_bank;
2188         }
2189
2190         res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2191 END:
2192         return res;
2193 }
2194
2195 module_i2c_driver(w83793_driver);
2196
2197 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2198 MODULE_DESCRIPTION("w83793 driver");
2199 MODULE_LICENSE("GPL");