Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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 int 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 int nowayout = WATCHDOG_NOWAYOUT;
75 module_param(nowayout, int, 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 /* only crit and crit_hyst affect real-time alarm status
114    current crit crit_hyst warn warn_hyst */
115 static u16 W83793_REG_TEMP[][5] = {
116         {0x1c, 0x78, 0x79, 0x7a, 0x7b},
117         {0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
118         {0x1e, 0x80, 0x81, 0x82, 0x83},
119         {0x1f, 0x84, 0x85, 0x86, 0x87},
120         {0x20, 0x88, 0x89, 0x8a, 0x8b},
121         {0x21, 0x8c, 0x8d, 0x8e, 0x8f},
122 };
123
124 #define W83793_REG_TEMP_LOW_BITS        0x22
125
126 #define W83793_REG_BEEP(index)          (0x53 + (index))
127 #define W83793_REG_ALARM(index)         (0x4b + (index))
128
129 #define W83793_REG_CLR_CHASSIS          0x4a    /* SMI MASK4 */
130 #define W83793_REG_IRQ_CTRL             0x50
131 #define W83793_REG_OVT_CTRL             0x51
132 #define W83793_REG_OVT_BEEP             0x52
133
134 #define IN_READ                         0
135 #define IN_MAX                          1
136 #define IN_LOW                          2
137 static const u16 W83793_REG_IN[][3] = {
138         /* Current, High, Low */
139         {0x10, 0x60, 0x61},     /* Vcore A      */
140         {0x11, 0x62, 0x63},     /* Vcore B      */
141         {0x12, 0x64, 0x65},     /* Vtt          */
142         {0x14, 0x6a, 0x6b},     /* VSEN1        */
143         {0x15, 0x6c, 0x6d},     /* VSEN2        */
144         {0x16, 0x6e, 0x6f},     /* +3VSEN       */
145         {0x17, 0x70, 0x71},     /* +12VSEN      */
146         {0x18, 0x72, 0x73},     /* 5VDD         */
147         {0x19, 0x74, 0x75},     /* 5VSB         */
148         {0x1a, 0x76, 0x77},     /* VBAT         */
149 };
150
151 /* Low Bits of Vcore A/B Vtt Read/High/Low */
152 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
153 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
154 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
155
156 #define W83793_REG_FAN(index)           (0x23 + 2 * (index))    /* High byte */
157 #define W83793_REG_FAN_MIN(index)       (0x90 + 2 * (index))    /* High byte */
158
159 #define W83793_REG_PWM_DEFAULT          0xb2
160 #define W83793_REG_PWM_ENABLE           0x207
161 #define W83793_REG_PWM_UPTIME           0xc3    /* Unit in 0.1 second */
162 #define W83793_REG_PWM_DOWNTIME         0xc4    /* Unit in 0.1 second */
163 #define W83793_REG_TEMP_CRITICAL        0xc5
164
165 #define PWM_DUTY                        0
166 #define PWM_START                       1
167 #define PWM_NONSTOP                     2
168 #define PWM_STOP_TIME                   3
169 #define W83793_REG_PWM(index, nr)       (((nr) == 0 ? 0xb3 : \
170                                          (nr) == 1 ? 0x220 : 0x218) + (index))
171
172 /* bit field, fan1 is bit0, fan2 is bit1 ... */
173 #define W83793_REG_TEMP_FAN_MAP(index)  (0x201 + (index))
174 #define W83793_REG_TEMP_TOL(index)      (0x208 + (index))
175 #define W83793_REG_TEMP_CRUISE(index)   (0x210 + (index))
176 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
177 #define W83793_REG_SF2_TEMP(index, nr)  (0x230 + ((index) << 4) + (nr))
178 #define W83793_REG_SF2_PWM(index, nr)   (0x238 + ((index) << 4) + (nr))
179
180 static inline unsigned long FAN_FROM_REG(u16 val)
181 {
182         if ((val >= 0xfff) || (val == 0))
183                 return  0;
184         return (1350000UL / val);
185 }
186
187 static inline u16 FAN_TO_REG(long rpm)
188 {
189         if (rpm <= 0)
190                 return 0x0fff;
191         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
192 }
193
194 static inline unsigned long TIME_FROM_REG(u8 reg)
195 {
196         return (reg * 100);
197 }
198
199 static inline u8 TIME_TO_REG(unsigned long val)
200 {
201         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
202 }
203
204 static inline long TEMP_FROM_REG(s8 reg)
205 {
206         return (reg * 1000);
207 }
208
209 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
210 {
211         return SENSORS_LIMIT((val + (val < 0 ? -500 : 500)) / 1000, min, max);
212 }
213
214 struct w83793_data {
215         struct i2c_client *lm75[2];
216         struct device *hwmon_dev;
217         struct mutex update_lock;
218         char valid;                     /* !=0 if following fields are valid */
219         unsigned long last_updated;     /* In jiffies */
220         unsigned long last_nonvolatile; /* In jiffies, last time we update the
221                                            nonvolatile registers */
222
223         u8 bank;
224         u8 vrm;
225         u8 vid[2];
226         u8 in[10][3];           /* Register value, read/high/low */
227         u8 in_low_bits[3];      /* Additional resolution for VCore A/B Vtt */
228
229         u16 has_fan;            /* Only fan1- fan5 has own pins */
230         u16 fan[12];            /* Register value combine */
231         u16 fan_min[12];        /* Register value combine */
232
233         s8 temp[6][5];          /* current, crit, crit_hyst,warn, warn_hyst */
234         u8 temp_low_bits;       /* Additional resolution TD1-TD4 */
235         u8 temp_mode[2];        /* byte 0: Temp D1-D4 mode each has 2 bits
236                                    byte 1: Temp R1,R2 mode, each has 1 bit */
237         u8 temp_critical;       /* If reached all fan will be at full speed */
238         u8 temp_fan_map[6];     /* Temp controls which pwm fan, bit field */
239
240         u8 has_pwm;
241         u8 has_temp;
242         u8 has_vid;
243         u8 pwm_enable;          /* Register value, each Temp has 1 bit */
244         u8 pwm_uptime;          /* Register value */
245         u8 pwm_downtime;        /* Register value */
246         u8 pwm_default;         /* All fan default pwm, next poweron valid */
247         u8 pwm[8][3];           /* Register value */
248         u8 pwm_stop_time[8];
249         u8 temp_cruise[6];
250
251         u8 alarms[5];           /* realtime status registers */
252         u8 beeps[5];
253         u8 beep_enable;
254         u8 tolerance[3];        /* Temp tolerance(Smart Fan I/II) */
255         u8 sf2_pwm[6][7];       /* Smart FanII: Fan duty cycle */
256         u8 sf2_temp[6][7];      /* Smart FanII: Temp level point */
257
258         /* watchdog */
259         struct i2c_client *client;
260         struct mutex watchdog_lock;
261         struct list_head list; /* member of the watchdog_data_list */
262         struct kref kref;
263         struct miscdevice watchdog_miscdev;
264         unsigned long watchdog_is_open;
265         char watchdog_expect_close;
266         char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
267         unsigned int watchdog_caused_reboot;
268         int watchdog_timeout; /* watchdog timeout in minutes */
269 };
270
271 /* Somewhat ugly :( global data pointer list with all devices, so that
272    we can find our device data as when using misc_register. There is no
273    other method to get to one's device data from the open file-op and
274    for usage in the reboot notifier callback. */
275 static LIST_HEAD(watchdog_data_list);
276
277 /* Note this lock not only protect list access, but also data.kref access */
278 static DEFINE_MUTEX(watchdog_data_mutex);
279
280 /* Release our data struct when we're detached from the i2c client *and* all
281    references to our watchdog device are released */
282 static void w83793_release_resources(struct kref *ref)
283 {
284         struct w83793_data *data = container_of(ref, struct w83793_data, kref);
285         kfree(data);
286 }
287
288 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
289 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
290 static int w83793_probe(struct i2c_client *client,
291                         const struct i2c_device_id *id);
292 static int w83793_detect(struct i2c_client *client,
293                          struct i2c_board_info *info);
294 static int w83793_remove(struct i2c_client *client);
295 static void w83793_init_client(struct i2c_client *client);
296 static void w83793_update_nonvolatile(struct device *dev);
297 static struct w83793_data *w83793_update_device(struct device *dev);
298
299 static const struct i2c_device_id w83793_id[] = {
300         { "w83793", 0 },
301         { }
302 };
303 MODULE_DEVICE_TABLE(i2c, w83793_id);
304
305 static struct i2c_driver w83793_driver = {
306         .class          = I2C_CLASS_HWMON,
307         .driver = {
308                    .name = "w83793",
309         },
310         .probe          = w83793_probe,
311         .remove         = w83793_remove,
312         .id_table       = w83793_id,
313         .detect         = w83793_detect,
314         .address_list   = normal_i2c,
315 };
316
317 static ssize_t
318 show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
319 {
320         struct w83793_data *data = dev_get_drvdata(dev);
321         return sprintf(buf, "%d\n", data->vrm);
322 }
323
324 static ssize_t
325 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
326 {
327         struct w83793_data *data = w83793_update_device(dev);
328         struct sensor_device_attribute_2 *sensor_attr =
329             to_sensor_dev_attr_2(attr);
330         int index = sensor_attr->index;
331
332         return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
333 }
334
335 static ssize_t
336 store_vrm(struct device *dev, struct device_attribute *attr,
337           const char *buf, size_t count)
338 {
339         struct w83793_data *data = dev_get_drvdata(dev);
340         data->vrm = simple_strtoul(buf, NULL, 10);
341         return count;
342 }
343
344 #define ALARM_STATUS                    0
345 #define BEEP_ENABLE                     1
346 static ssize_t
347 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
348 {
349         struct w83793_data *data = w83793_update_device(dev);
350         struct sensor_device_attribute_2 *sensor_attr =
351             to_sensor_dev_attr_2(attr);
352         int nr = sensor_attr->nr;
353         int index = sensor_attr->index >> 3;
354         int bit = sensor_attr->index & 0x07;
355         u8 val;
356
357         if (ALARM_STATUS == nr) {
358                 val = (data->alarms[index] >> (bit)) & 1;
359         } else {                /* BEEP_ENABLE */
360                 val = (data->beeps[index] >> (bit)) & 1;
361         }
362
363         return sprintf(buf, "%u\n", val);
364 }
365
366 static ssize_t
367 store_beep(struct device *dev, struct device_attribute *attr,
368            const char *buf, size_t count)
369 {
370         struct i2c_client *client = to_i2c_client(dev);
371         struct w83793_data *data = i2c_get_clientdata(client);
372         struct sensor_device_attribute_2 *sensor_attr =
373             to_sensor_dev_attr_2(attr);
374         int index = sensor_attr->index >> 3;
375         int shift = sensor_attr->index & 0x07;
376         u8 beep_bit = 1 << shift;
377         u8 val;
378
379         val = simple_strtoul(buf, NULL, 10);
380         if (val != 0 && val != 1)
381                 return -EINVAL;
382
383         mutex_lock(&data->update_lock);
384         data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
385         data->beeps[index] &= ~beep_bit;
386         data->beeps[index] |= val << shift;
387         w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
388         mutex_unlock(&data->update_lock);
389
390         return count;
391 }
392
393 static ssize_t
394 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
395 {
396         struct w83793_data *data = w83793_update_device(dev);
397         return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
398 }
399
400 static ssize_t
401 store_beep_enable(struct device *dev, struct device_attribute *attr,
402                   const char *buf, size_t count)
403 {
404         struct i2c_client *client = to_i2c_client(dev);
405         struct w83793_data *data = i2c_get_clientdata(client);
406         u8 val = simple_strtoul(buf, NULL, 10);
407
408         if (val != 0 && val != 1)
409                 return -EINVAL;
410
411         mutex_lock(&data->update_lock);
412         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
413                             & 0xfd;
414         data->beep_enable |= val << 1;
415         w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
416         mutex_unlock(&data->update_lock);
417
418         return count;
419 }
420
421 /* Write any value to clear chassis alarm */
422 static ssize_t
423 store_chassis_clear(struct device *dev,
424                     struct device_attribute *attr, const char *buf,
425                     size_t count)
426 {
427         struct i2c_client *client = to_i2c_client(dev);
428         struct w83793_data *data = i2c_get_clientdata(client);
429         u8 val;
430
431         mutex_lock(&data->update_lock);
432         val = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
433         val |= 0x80;
434         w83793_write_value(client, W83793_REG_CLR_CHASSIS, val);
435         mutex_unlock(&data->update_lock);
436         return count;
437 }
438
439 #define FAN_INPUT                       0
440 #define FAN_MIN                         1
441 static ssize_t
442 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
443 {
444         struct sensor_device_attribute_2 *sensor_attr =
445             to_sensor_dev_attr_2(attr);
446         int nr = sensor_attr->nr;
447         int index = sensor_attr->index;
448         struct w83793_data *data = w83793_update_device(dev);
449         u16 val;
450
451         if (FAN_INPUT == nr) {
452                 val = data->fan[index] & 0x0fff;
453         } else {
454                 val = data->fan_min[index] & 0x0fff;
455         }
456
457         return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
458 }
459
460 static ssize_t
461 store_fan_min(struct device *dev, struct device_attribute *attr,
462               const char *buf, size_t count)
463 {
464         struct sensor_device_attribute_2 *sensor_attr =
465             to_sensor_dev_attr_2(attr);
466         int index = sensor_attr->index;
467         struct i2c_client *client = to_i2c_client(dev);
468         struct w83793_data *data = i2c_get_clientdata(client);
469         u16 val = FAN_TO_REG(simple_strtoul(buf, NULL, 10));
470
471         mutex_lock(&data->update_lock);
472         data->fan_min[index] = val;
473         w83793_write_value(client, W83793_REG_FAN_MIN(index),
474                            (val >> 8) & 0xff);
475         w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
476         mutex_unlock(&data->update_lock);
477
478         return count;
479 }
480
481 static ssize_t
482 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
483 {
484         struct sensor_device_attribute_2 *sensor_attr =
485             to_sensor_dev_attr_2(attr);
486         struct w83793_data *data = w83793_update_device(dev);
487         u16 val;
488         int nr = sensor_attr->nr;
489         int index = sensor_attr->index;
490
491         if (PWM_STOP_TIME == nr)
492                 val = TIME_FROM_REG(data->pwm_stop_time[index]);
493         else
494                 val = (data->pwm[index][nr] & 0x3f) << 2;
495
496         return sprintf(buf, "%d\n", val);
497 }
498
499 static ssize_t
500 store_pwm(struct device *dev, struct device_attribute *attr,
501           const char *buf, size_t count)
502 {
503         struct i2c_client *client = to_i2c_client(dev);
504         struct w83793_data *data = i2c_get_clientdata(client);
505         struct sensor_device_attribute_2 *sensor_attr =
506             to_sensor_dev_attr_2(attr);
507         int nr = sensor_attr->nr;
508         int index = sensor_attr->index;
509         u8 val;
510
511         mutex_lock(&data->update_lock);
512         if (PWM_STOP_TIME == nr) {
513                 val = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
514                 data->pwm_stop_time[index] = val;
515                 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
516                                    val);
517         } else {
518                 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 0xff)
519                       >> 2;
520                 data->pwm[index][nr] =
521                     w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
522                 data->pwm[index][nr] |= val;
523                 w83793_write_value(client, W83793_REG_PWM(index, nr),
524                                                         data->pwm[index][nr]);
525         }
526
527         mutex_unlock(&data->update_lock);
528         return count;
529 }
530
531 static ssize_t
532 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
533 {
534         struct sensor_device_attribute_2 *sensor_attr =
535             to_sensor_dev_attr_2(attr);
536         int nr = sensor_attr->nr;
537         int index = sensor_attr->index;
538         struct w83793_data *data = w83793_update_device(dev);
539         long temp = TEMP_FROM_REG(data->temp[index][nr]);
540
541         if (TEMP_READ == nr && index < 4) {     /* Only TD1-TD4 have low bits */
542                 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
543                 temp += temp > 0 ? low : -low;
544         }
545         return sprintf(buf, "%ld\n", temp);
546 }
547
548 static ssize_t
549 store_temp(struct device *dev, struct device_attribute *attr,
550            const char *buf, size_t count)
551 {
552         struct sensor_device_attribute_2 *sensor_attr =
553             to_sensor_dev_attr_2(attr);
554         int nr = sensor_attr->nr;
555         int index = sensor_attr->index;
556         struct i2c_client *client = to_i2c_client(dev);
557         struct w83793_data *data = i2c_get_clientdata(client);
558         long tmp = simple_strtol(buf, NULL, 10);
559
560         mutex_lock(&data->update_lock);
561         data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
562         w83793_write_value(client, W83793_REG_TEMP[index][nr],
563                            data->temp[index][nr]);
564         mutex_unlock(&data->update_lock);
565         return count;
566 }
567
568 /*
569         TD1-TD4
570         each has 4 mode:(2 bits)
571         0:      Stop monitor
572         1:      Use internal temp sensor(default)
573         2:      Reserved
574         3:      Use sensor in Intel CPU and get result by PECI
575
576         TR1-TR2
577         each has 2 mode:(1 bit)
578         0:      Disable temp sensor monitor
579         1:      To enable temp sensors monitor
580 */
581
582 /* 0 disable, 6 PECI */
583 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
584
585 static ssize_t
586 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
587 {
588         struct w83793_data *data = w83793_update_device(dev);
589         struct sensor_device_attribute_2 *sensor_attr =
590             to_sensor_dev_attr_2(attr);
591         int index = sensor_attr->index;
592         u8 mask = (index < 4) ? 0x03 : 0x01;
593         u8 shift = (index < 4) ? (2 * index) : (index - 4);
594         u8 tmp;
595         index = (index < 4) ? 0 : 1;
596
597         tmp = (data->temp_mode[index] >> shift) & mask;
598
599         /* for the internal sensor, found out if diode or thermistor */
600         if (tmp == 1) {
601                 tmp = index == 0 ? 3 : 4;
602         } else {
603                 tmp = TO_TEMP_MODE[tmp];
604         }
605
606         return sprintf(buf, "%d\n", tmp);
607 }
608
609 static ssize_t
610 store_temp_mode(struct device *dev, struct device_attribute *attr,
611                 const char *buf, size_t count)
612 {
613         struct i2c_client *client = to_i2c_client(dev);
614         struct w83793_data *data = i2c_get_clientdata(client);
615         struct sensor_device_attribute_2 *sensor_attr =
616             to_sensor_dev_attr_2(attr);
617         int index = sensor_attr->index;
618         u8 mask = (index < 4) ? 0x03 : 0x01;
619         u8 shift = (index < 4) ? (2 * index) : (index - 4);
620         u8 val = simple_strtoul(buf, NULL, 10);
621
622         /* transform the sysfs interface values into table above */
623         if ((val == 6) && (index < 4)) {
624                 val -= 3;
625         } else if ((val == 3 && index < 4)
626                 || (val == 4 && index >= 4)) {
627                 /* transform diode or thermistor into internal enable */
628                 val = !!val;
629         } else {
630                 return -EINVAL;
631         }
632
633         index = (index < 4) ? 0 : 1;
634         mutex_lock(&data->update_lock);
635         data->temp_mode[index] =
636             w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
637         data->temp_mode[index] &= ~(mask << shift);
638         data->temp_mode[index] |= val << shift;
639         w83793_write_value(client, W83793_REG_TEMP_MODE[index],
640                                                         data->temp_mode[index]);
641         mutex_unlock(&data->update_lock);
642
643         return count;
644 }
645
646 #define SETUP_PWM_DEFAULT               0
647 #define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
648 #define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
649 #define SETUP_TEMP_CRITICAL             3
650 static ssize_t
651 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
652 {
653         struct sensor_device_attribute_2 *sensor_attr =
654             to_sensor_dev_attr_2(attr);
655         int nr = sensor_attr->nr;
656         struct w83793_data *data = w83793_update_device(dev);
657         u32 val = 0;
658
659         if (SETUP_PWM_DEFAULT == nr) {
660                 val = (data->pwm_default & 0x3f) << 2;
661         } else if (SETUP_PWM_UPTIME == nr) {
662                 val = TIME_FROM_REG(data->pwm_uptime);
663         } else if (SETUP_PWM_DOWNTIME == nr) {
664                 val = TIME_FROM_REG(data->pwm_downtime);
665         } else if (SETUP_TEMP_CRITICAL == nr) {
666                 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
667         }
668
669         return sprintf(buf, "%d\n", val);
670 }
671
672 static ssize_t
673 store_sf_setup(struct device *dev, struct device_attribute *attr,
674                const char *buf, size_t count)
675 {
676         struct sensor_device_attribute_2 *sensor_attr =
677             to_sensor_dev_attr_2(attr);
678         int nr = sensor_attr->nr;
679         struct i2c_client *client = to_i2c_client(dev);
680         struct w83793_data *data = i2c_get_clientdata(client);
681
682         mutex_lock(&data->update_lock);
683         if (SETUP_PWM_DEFAULT == nr) {
684                 data->pwm_default =
685                     w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
686                 data->pwm_default |= SENSORS_LIMIT(simple_strtoul(buf, NULL,
687                                                                   10),
688                                                    0, 0xff) >> 2;
689                 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
690                                                         data->pwm_default);
691         } else if (SETUP_PWM_UPTIME == nr) {
692                 data->pwm_uptime = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
693                 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
694                 w83793_write_value(client, W83793_REG_PWM_UPTIME,
695                                                         data->pwm_uptime);
696         } else if (SETUP_PWM_DOWNTIME == nr) {
697                 data->pwm_downtime = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
698                 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
699                 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
700                                                         data->pwm_downtime);
701         } else {                /* SETUP_TEMP_CRITICAL */
702                 data->temp_critical =
703                     w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
704                 data->temp_critical |= TEMP_TO_REG(simple_strtol(buf, NULL, 10),
705                                                    0, 0x7f);
706                 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
707                                                         data->temp_critical);
708         }
709
710         mutex_unlock(&data->update_lock);
711         return count;
712 }
713
714 /*
715         Temp SmartFan control
716         TEMP_FAN_MAP
717         Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
718         It's possible two or more temp channels control the same fan, w83793
719         always prefers to pick the most critical request and applies it to
720         the related Fan.
721         It's possible one fan is not in any mapping of 6 temp channels, this
722         means the fan is manual mode
723
724         TEMP_PWM_ENABLE
725         Each temp channel has its own SmartFan mode, and temp channel
726         control fans that are set by TEMP_FAN_MAP
727         0:      SmartFanII mode
728         1:      Thermal Cruise Mode
729
730         TEMP_CRUISE
731         Target temperature in thermal cruise mode, w83793 will try to turn
732         fan speed to keep the temperature of target device around this
733         temperature.
734
735         TEMP_TOLERANCE
736         If Temp higher or lower than target with this tolerance, w83793
737         will take actions to speed up or slow down the fan to keep the
738         temperature within the tolerance range.
739 */
740
741 #define TEMP_FAN_MAP                    0
742 #define TEMP_PWM_ENABLE                 1
743 #define TEMP_CRUISE                     2
744 #define TEMP_TOLERANCE                  3
745 static ssize_t
746 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
747 {
748         struct sensor_device_attribute_2 *sensor_attr =
749             to_sensor_dev_attr_2(attr);
750         int nr = sensor_attr->nr;
751         int index = sensor_attr->index;
752         struct w83793_data *data = w83793_update_device(dev);
753         u32 val;
754
755         if (TEMP_FAN_MAP == nr) {
756                 val = data->temp_fan_map[index];
757         } else if (TEMP_PWM_ENABLE == nr) {
758                 /* +2 to transfrom into 2 and 3 to conform with sysfs intf */
759                 val = ((data->pwm_enable >> index) & 0x01) + 2;
760         } else if (TEMP_CRUISE == nr) {
761                 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
762         } else {                /* TEMP_TOLERANCE */
763                 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
764                 val = TEMP_FROM_REG(val & 0x0f);
765         }
766         return sprintf(buf, "%d\n", val);
767 }
768
769 static ssize_t
770 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
771               const char *buf, size_t count)
772 {
773         struct sensor_device_attribute_2 *sensor_attr =
774             to_sensor_dev_attr_2(attr);
775         int nr = sensor_attr->nr;
776         int index = sensor_attr->index;
777         struct i2c_client *client = to_i2c_client(dev);
778         struct w83793_data *data = i2c_get_clientdata(client);
779         u32 val;
780
781         mutex_lock(&data->update_lock);
782         if (TEMP_FAN_MAP == nr) {
783                 val = simple_strtoul(buf, NULL, 10) & 0xff;
784                 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
785                 data->temp_fan_map[index] = val;
786         } else if (TEMP_PWM_ENABLE == nr) {
787                 val = simple_strtoul(buf, NULL, 10);
788                 if (2 == val || 3 == val) {
789                         data->pwm_enable =
790                             w83793_read_value(client, W83793_REG_PWM_ENABLE);
791                         if (val - 2)
792                                 data->pwm_enable |= 1 << index;
793                         else
794                                 data->pwm_enable &= ~(1 << index);
795                         w83793_write_value(client, W83793_REG_PWM_ENABLE,
796                                                         data->pwm_enable);
797                 } else {
798                         mutex_unlock(&data->update_lock);
799                         return -EINVAL;
800                 }
801         } else if (TEMP_CRUISE == nr) {
802                 data->temp_cruise[index] =
803                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
804                 val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x7f);
805                 data->temp_cruise[index] &= 0x80;
806                 data->temp_cruise[index] |= val;
807
808                 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
809                                                 data->temp_cruise[index]);
810         } else {                /* TEMP_TOLERANCE */
811                 int i = index >> 1;
812                 u8 shift = (index & 0x01) ? 4 : 0;
813                 data->tolerance[i] =
814                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
815
816                 val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x0f);
817                 data->tolerance[i] &= ~(0x0f << shift);
818                 data->tolerance[i] |= val << shift;
819                 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
820                                                         data->tolerance[i]);
821         }
822
823         mutex_unlock(&data->update_lock);
824         return count;
825 }
826
827 static ssize_t
828 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
829 {
830         struct sensor_device_attribute_2 *sensor_attr =
831             to_sensor_dev_attr_2(attr);
832         int nr = sensor_attr->nr;
833         int index = sensor_attr->index;
834         struct w83793_data *data = w83793_update_device(dev);
835
836         return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
837 }
838
839 static ssize_t
840 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
841               const char *buf, size_t count)
842 {
843         struct i2c_client *client = to_i2c_client(dev);
844         struct w83793_data *data = i2c_get_clientdata(client);
845         struct sensor_device_attribute_2 *sensor_attr =
846             to_sensor_dev_attr_2(attr);
847         int nr = sensor_attr->nr;
848         int index = sensor_attr->index;
849         u8 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 0xff) >> 2;
850
851         mutex_lock(&data->update_lock);
852         data->sf2_pwm[index][nr] =
853             w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
854         data->sf2_pwm[index][nr] |= val;
855         w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
856                                                 data->sf2_pwm[index][nr]);
857         mutex_unlock(&data->update_lock);
858         return count;
859 }
860
861 static ssize_t
862 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
863 {
864         struct sensor_device_attribute_2 *sensor_attr =
865             to_sensor_dev_attr_2(attr);
866         int nr = sensor_attr->nr;
867         int index = sensor_attr->index;
868         struct w83793_data *data = w83793_update_device(dev);
869
870         return sprintf(buf, "%ld\n",
871                        TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
872 }
873
874 static ssize_t
875 store_sf2_temp(struct device *dev, struct device_attribute *attr,
876                const char *buf, size_t count)
877 {
878         struct i2c_client *client = to_i2c_client(dev);
879         struct w83793_data *data = i2c_get_clientdata(client);
880         struct sensor_device_attribute_2 *sensor_attr =
881             to_sensor_dev_attr_2(attr);
882         int nr = sensor_attr->nr;
883         int index = sensor_attr->index;
884         u8 val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x7f);
885
886         mutex_lock(&data->update_lock);
887         data->sf2_temp[index][nr] =
888             w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
889         data->sf2_temp[index][nr] |= val;
890         w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
891                                              data->sf2_temp[index][nr]);
892         mutex_unlock(&data->update_lock);
893         return count;
894 }
895
896 /* only Vcore A/B and Vtt have additional 2 bits precision */
897 static ssize_t
898 show_in(struct device *dev, struct device_attribute *attr, char *buf)
899 {
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         struct w83793_data *data = w83793_update_device(dev);
905         u16 val = data->in[index][nr];
906
907         if (index < 3) {
908                 val <<= 2;
909                 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
910         }
911         /* voltage inputs 5VDD and 5VSB needs 150mV offset */
912         val = val * scale_in[index] + scale_in_add[index];
913         return sprintf(buf, "%d\n", val);
914 }
915
916 static ssize_t
917 store_in(struct device *dev, struct device_attribute *attr,
918          const char *buf, size_t count)
919 {
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         struct i2c_client *client = to_i2c_client(dev);
925         struct w83793_data *data = i2c_get_clientdata(client);
926         u32 val;
927
928         val =
929             (simple_strtoul(buf, NULL, 10) +
930              scale_in[index] / 2) / scale_in[index];
931         mutex_lock(&data->update_lock);
932         if (index > 2) {
933                 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
934                 if (1 == nr || 2 == nr) {
935                         val -= scale_in_add[index] / scale_in[index];
936                 }
937                 val = SENSORS_LIMIT(val, 0, 255);
938         } else {
939                 val = SENSORS_LIMIT(val, 0, 0x3FF);
940                 data->in_low_bits[nr] =
941                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
942                 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
943                 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
944                 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
945                                                      data->in_low_bits[nr]);
946                 val >>= 2;
947         }
948         data->in[index][nr] = val;
949         w83793_write_value(client, W83793_REG_IN[index][nr],
950                                                         data->in[index][nr]);
951         mutex_unlock(&data->update_lock);
952         return count;
953 }
954
955 #define NOT_USED                        -1
956
957 #define SENSOR_ATTR_IN(index)                                           \
958         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
959                 IN_READ, index),                                        \
960         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
961                 store_in, IN_MAX, index),                               \
962         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
963                 store_in, IN_LOW, index),                               \
964         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
965                 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
966         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
967                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
968                 index + ((index > 2) ? 1 : 0))
969
970 #define SENSOR_ATTR_FAN(index)                                          \
971         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
972                 NULL, ALARM_STATUS, index + 17),                        \
973         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
974                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
975         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
976                 NULL, FAN_INPUT, index - 1),                            \
977         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
978                 show_fan, store_fan_min, FAN_MIN, index - 1)
979
980 #define SENSOR_ATTR_PWM(index)                                          \
981         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
982                 store_pwm, PWM_DUTY, index - 1),                        \
983         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
984                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
985         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
986                 show_pwm, store_pwm, PWM_START, index - 1),             \
987         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
988                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
989
990 #define SENSOR_ATTR_TEMP(index)                                         \
991         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
992                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
993         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
994                 NULL, TEMP_READ, index - 1),                            \
995         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
996                 store_temp, TEMP_CRIT, index - 1),                      \
997         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
998                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
999         SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1000                 store_temp, TEMP_WARN, index - 1),                      \
1001         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1002                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1003         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1004                 show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1005         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1006                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1007         SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1008                 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1009                 TEMP_FAN_MAP, index - 1),                               \
1010         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1011                 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1012                 index - 1),                                             \
1013         SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1014                 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1015         SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1016                 store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1017         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1018                 show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1019         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1020                 show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1021         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1022                 show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1023         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1024                 show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1025         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1026                 show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1027         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1028                 show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1029         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1030                 show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1031         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1032                 show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1033         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1034                 show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1035         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1036                 show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1037         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1038                 show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1039         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1040                 show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1041         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1042                 show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1043         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1044                 show_sf2_temp, store_sf2_temp, 6, index - 1)
1045
1046 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1047         SENSOR_ATTR_IN(0),
1048         SENSOR_ATTR_IN(1),
1049         SENSOR_ATTR_IN(2),
1050         SENSOR_ATTR_IN(3),
1051         SENSOR_ATTR_IN(4),
1052         SENSOR_ATTR_IN(5),
1053         SENSOR_ATTR_IN(6),
1054         SENSOR_ATTR_IN(7),
1055         SENSOR_ATTR_IN(8),
1056         SENSOR_ATTR_IN(9),
1057         SENSOR_ATTR_FAN(1),
1058         SENSOR_ATTR_FAN(2),
1059         SENSOR_ATTR_FAN(3),
1060         SENSOR_ATTR_FAN(4),
1061         SENSOR_ATTR_FAN(5),
1062         SENSOR_ATTR_PWM(1),
1063         SENSOR_ATTR_PWM(2),
1064         SENSOR_ATTR_PWM(3),
1065 };
1066
1067 static struct sensor_device_attribute_2 w83793_temp[] = {
1068         SENSOR_ATTR_TEMP(1),
1069         SENSOR_ATTR_TEMP(2),
1070         SENSOR_ATTR_TEMP(3),
1071         SENSOR_ATTR_TEMP(4),
1072         SENSOR_ATTR_TEMP(5),
1073         SENSOR_ATTR_TEMP(6),
1074 };
1075
1076 /* Fan6-Fan12 */
1077 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1078         SENSOR_ATTR_FAN(6),
1079         SENSOR_ATTR_FAN(7),
1080         SENSOR_ATTR_FAN(8),
1081         SENSOR_ATTR_FAN(9),
1082         SENSOR_ATTR_FAN(10),
1083         SENSOR_ATTR_FAN(11),
1084         SENSOR_ATTR_FAN(12),
1085 };
1086
1087 /* Pwm4-Pwm8 */
1088 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1089         SENSOR_ATTR_PWM(4),
1090         SENSOR_ATTR_PWM(5),
1091         SENSOR_ATTR_PWM(6),
1092         SENSOR_ATTR_PWM(7),
1093         SENSOR_ATTR_PWM(8),
1094 };
1095
1096 static struct sensor_device_attribute_2 w83793_vid[] = {
1097         SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1098         SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1099 };
1100 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
1101
1102 static struct sensor_device_attribute_2 sda_single_files[] = {
1103         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1104                       store_chassis_clear, ALARM_STATUS, 30),
1105         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1106                       store_beep_enable, NOT_USED, NOT_USED),
1107         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1108                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1109         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1110                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1111         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1112                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1113         SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1114                       store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1115 };
1116
1117 static void w83793_init_client(struct i2c_client *client)
1118 {
1119         if (reset) {
1120                 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1121         }
1122
1123         /* Start monitoring */
1124         w83793_write_value(client, W83793_REG_CONFIG,
1125                            w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1126 }
1127
1128 /*
1129  * Watchdog routines
1130  */
1131
1132 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1133 {
1134         int ret, mtimeout;
1135
1136         mtimeout = DIV_ROUND_UP(timeout, 60);
1137
1138         if (mtimeout > 255)
1139                 return -EINVAL;
1140
1141         mutex_lock(&data->watchdog_lock);
1142         if (!data->client) {
1143                 ret = -ENODEV;
1144                 goto leave;
1145         }
1146
1147         data->watchdog_timeout = mtimeout;
1148
1149         /* Set Timeout value (in Minutes) */
1150         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1151                            data->watchdog_timeout);
1152
1153         ret = mtimeout * 60;
1154
1155 leave:
1156         mutex_unlock(&data->watchdog_lock);
1157         return ret;
1158 }
1159
1160 static int watchdog_get_timeout(struct w83793_data *data)
1161 {
1162         int timeout;
1163
1164         mutex_lock(&data->watchdog_lock);
1165         timeout = data->watchdog_timeout * 60;
1166         mutex_unlock(&data->watchdog_lock);
1167
1168         return timeout;
1169 }
1170
1171 static int watchdog_trigger(struct w83793_data *data)
1172 {
1173         int ret = 0;
1174
1175         mutex_lock(&data->watchdog_lock);
1176         if (!data->client) {
1177                 ret = -ENODEV;
1178                 goto leave;
1179         }
1180
1181         /* Set Timeout value (in Minutes) */
1182         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1183                            data->watchdog_timeout);
1184
1185 leave:
1186         mutex_unlock(&data->watchdog_lock);
1187         return ret;
1188 }
1189
1190 static int watchdog_enable(struct w83793_data *data)
1191 {
1192         int ret = 0;
1193
1194         mutex_lock(&data->watchdog_lock);
1195         if (!data->client) {
1196                 ret = -ENODEV;
1197                 goto leave;
1198         }
1199
1200         /* Set initial timeout */
1201         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1202                            data->watchdog_timeout);
1203
1204         /* Enable Soft Watchdog */
1205         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1206
1207 leave:
1208         mutex_unlock(&data->watchdog_lock);
1209         return ret;
1210 }
1211
1212 static int watchdog_disable(struct w83793_data *data)
1213 {
1214         int ret = 0;
1215
1216         mutex_lock(&data->watchdog_lock);
1217         if (!data->client) {
1218                 ret = -ENODEV;
1219                 goto leave;
1220         }
1221
1222         /* Disable Soft Watchdog */
1223         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1224
1225 leave:
1226         mutex_unlock(&data->watchdog_lock);
1227         return ret;
1228 }
1229
1230 static int watchdog_open(struct inode *inode, struct file *filp)
1231 {
1232         struct w83793_data *pos, *data = NULL;
1233         int watchdog_is_open;
1234
1235         /* We get called from drivers/char/misc.c with misc_mtx hold, and we
1236            call misc_register() from  w83793_probe() with watchdog_data_mutex
1237            hold, as misc_register() takes the misc_mtx lock, this is a possible
1238            deadlock, so we use mutex_trylock here. */
1239         if (!mutex_trylock(&watchdog_data_mutex))
1240                 return -ERESTARTSYS;
1241         list_for_each_entry(pos, &watchdog_data_list, list) {
1242                 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1243                         data = pos;
1244                         break;
1245                 }
1246         }
1247
1248         /* Check, if device is already open */
1249         watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1250
1251         /* Increase data reference counter (if not already done).
1252            Note we can never not have found data, so we don't check for this */
1253         if (!watchdog_is_open)
1254                 kref_get(&data->kref);
1255
1256         mutex_unlock(&watchdog_data_mutex);
1257
1258         /* Check, if device is already open and possibly issue error */
1259         if (watchdog_is_open)
1260                 return -EBUSY;
1261
1262         /* Enable Soft Watchdog */
1263         watchdog_enable(data);
1264
1265         /* Store pointer to data into filp's private data */
1266         filp->private_data = data;
1267
1268         return nonseekable_open(inode, filp);
1269 }
1270
1271 static int watchdog_close(struct inode *inode, struct file *filp)
1272 {
1273         struct w83793_data *data = filp->private_data;
1274
1275         if (data->watchdog_expect_close) {
1276                 watchdog_disable(data);
1277                 data->watchdog_expect_close = 0;
1278         } else {
1279                 watchdog_trigger(data);
1280                 dev_crit(&data->client->dev,
1281                         "unexpected close, not stopping watchdog!\n");
1282         }
1283
1284         clear_bit(0, &data->watchdog_is_open);
1285
1286         /* Decrease data reference counter */
1287         mutex_lock(&watchdog_data_mutex);
1288         kref_put(&data->kref, w83793_release_resources);
1289         mutex_unlock(&watchdog_data_mutex);
1290
1291         return 0;
1292 }
1293
1294 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1295         size_t count, loff_t *offset)
1296 {
1297         ssize_t ret;
1298         struct w83793_data *data = filp->private_data;
1299
1300         if (count) {
1301                 if (!nowayout) {
1302                         size_t i;
1303
1304                         /* Clear it in case it was set with a previous write */
1305                         data->watchdog_expect_close = 0;
1306
1307                         for (i = 0; i != count; i++) {
1308                                 char c;
1309                                 if (get_user(c, buf + i))
1310                                         return -EFAULT;
1311                                 if (c == 'V')
1312                                         data->watchdog_expect_close = 1;
1313                         }
1314                 }
1315                 ret = watchdog_trigger(data);
1316                 if (ret < 0)
1317                         return ret;
1318         }
1319         return count;
1320 }
1321
1322 static int watchdog_ioctl(struct inode *inode, struct file *filp,
1323                           unsigned int cmd, unsigned long arg)
1324 {
1325         static struct watchdog_info ident = {
1326                 .options = WDIOF_KEEPALIVEPING |
1327                            WDIOF_SETTIMEOUT |
1328                            WDIOF_CARDRESET,
1329                 .identity = "w83793 watchdog"
1330         };
1331
1332         int val, ret = 0;
1333         struct w83793_data *data = filp->private_data;
1334
1335         switch (cmd) {
1336         case WDIOC_GETSUPPORT:
1337                 if (!nowayout)
1338                         ident.options |= WDIOF_MAGICCLOSE;
1339                 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1340                         ret = -EFAULT;
1341                 break;
1342
1343         case WDIOC_GETSTATUS:
1344                 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1345                 ret = put_user(val, (int __user *)arg);
1346                 break;
1347
1348         case WDIOC_GETBOOTSTATUS:
1349                 ret = put_user(0, (int __user *)arg);
1350                 break;
1351
1352         case WDIOC_KEEPALIVE:
1353                 ret = watchdog_trigger(data);
1354                 break;
1355
1356         case WDIOC_GETTIMEOUT:
1357                 val = watchdog_get_timeout(data);
1358                 ret = put_user(val, (int __user *)arg);
1359                 break;
1360
1361         case WDIOC_SETTIMEOUT:
1362                 if (get_user(val, (int __user *)arg)) {
1363                         ret = -EFAULT;
1364                         break;
1365                 }
1366                 ret = watchdog_set_timeout(data, val);
1367                 if (ret > 0)
1368                         ret = put_user(ret, (int __user *)arg);
1369                 break;
1370
1371         case WDIOC_SETOPTIONS:
1372                 if (get_user(val, (int __user *)arg)) {
1373                         ret = -EFAULT;
1374                         break;
1375                 }
1376
1377                 if (val & WDIOS_DISABLECARD)
1378                         ret = watchdog_disable(data);
1379                 else if (val & WDIOS_ENABLECARD)
1380                         ret = watchdog_enable(data);
1381                 else
1382                         ret = -EINVAL;
1383
1384                 break;
1385         default:
1386                 ret = -ENOTTY;
1387         }
1388
1389         return ret;
1390 }
1391
1392 static const struct file_operations watchdog_fops = {
1393         .owner = THIS_MODULE,
1394         .llseek = no_llseek,
1395         .open = watchdog_open,
1396         .release = watchdog_close,
1397         .write = watchdog_write,
1398         .ioctl = watchdog_ioctl,
1399 };
1400
1401 /*
1402  *      Notifier for system down
1403  */
1404
1405 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1406                                void *unused)
1407 {
1408         struct w83793_data *data = NULL;
1409
1410         if (code == SYS_DOWN || code == SYS_HALT) {
1411
1412                 /* Disable each registered watchdog */
1413                 mutex_lock(&watchdog_data_mutex);
1414                 list_for_each_entry(data, &watchdog_data_list, list) {
1415                         if (data->watchdog_miscdev.minor)
1416                                 watchdog_disable(data);
1417                 }
1418                 mutex_unlock(&watchdog_data_mutex);
1419         }
1420
1421         return NOTIFY_DONE;
1422 }
1423
1424 /*
1425  *      The WDT needs to learn about soft shutdowns in order to
1426  *      turn the timebomb registers off.
1427  */
1428
1429 static struct notifier_block watchdog_notifier = {
1430         .notifier_call = watchdog_notify_sys,
1431 };
1432
1433 /*
1434  * Init / remove routines
1435  */
1436
1437 static int w83793_remove(struct i2c_client *client)
1438 {
1439         struct w83793_data *data = i2c_get_clientdata(client);
1440         struct device *dev = &client->dev;
1441         int i, tmp;
1442
1443         /* Unregister the watchdog (if registered) */
1444         if (data->watchdog_miscdev.minor) {
1445                 misc_deregister(&data->watchdog_miscdev);
1446
1447                 if (data->watchdog_is_open) {
1448                         dev_warn(&client->dev,
1449                                 "i2c client detached with watchdog open! "
1450                                 "Stopping watchdog.\n");
1451                         watchdog_disable(data);
1452                 }
1453
1454                 mutex_lock(&watchdog_data_mutex);
1455                 list_del(&data->list);
1456                 mutex_unlock(&watchdog_data_mutex);
1457
1458                 /* Tell the watchdog code the client is gone */
1459                 mutex_lock(&data->watchdog_lock);
1460                 data->client = NULL;
1461                 mutex_unlock(&data->watchdog_lock);
1462         }
1463
1464         /* Reset Configuration Register to Disable Watch Dog Registers */
1465         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1466         w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1467
1468         unregister_reboot_notifier(&watchdog_notifier);
1469
1470         hwmon_device_unregister(data->hwmon_dev);
1471
1472         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1473                 device_remove_file(dev,
1474                                    &w83793_sensor_attr_2[i].dev_attr);
1475
1476         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1477                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1478
1479         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1480                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1481         device_remove_file(dev, &dev_attr_vrm);
1482
1483         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1484                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1485
1486         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1487                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1488
1489         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1490                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1491
1492         if (data->lm75[0] != NULL)
1493                 i2c_unregister_device(data->lm75[0]);
1494         if (data->lm75[1] != NULL)
1495                 i2c_unregister_device(data->lm75[1]);
1496
1497         /* Decrease data reference counter */
1498         mutex_lock(&watchdog_data_mutex);
1499         kref_put(&data->kref, w83793_release_resources);
1500         mutex_unlock(&watchdog_data_mutex);
1501
1502         return 0;
1503 }
1504
1505 static int
1506 w83793_detect_subclients(struct i2c_client *client)
1507 {
1508         int i, id, err;
1509         int address = client->addr;
1510         u8 tmp;
1511         struct i2c_adapter *adapter = client->adapter;
1512         struct w83793_data *data = i2c_get_clientdata(client);
1513
1514         id = i2c_adapter_id(adapter);
1515         if (force_subclients[0] == id && force_subclients[1] == address) {
1516                 for (i = 2; i <= 3; i++) {
1517                         if (force_subclients[i] < 0x48
1518                             || force_subclients[i] > 0x4f) {
1519                                 dev_err(&client->dev,
1520                                         "invalid subclient "
1521                                         "address %d; must be 0x48-0x4f\n",
1522                                         force_subclients[i]);
1523                                 err = -EINVAL;
1524                                 goto ERROR_SC_0;
1525                         }
1526                 }
1527                 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1528                                    (force_subclients[2] & 0x07) |
1529                                    ((force_subclients[3] & 0x07) << 4));
1530         }
1531
1532         tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1533         if (!(tmp & 0x08)) {
1534                 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1535         }
1536         if (!(tmp & 0x80)) {
1537                 if ((data->lm75[0] != NULL)
1538                     && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1539                         dev_err(&client->dev,
1540                                 "duplicate addresses 0x%x, "
1541                                 "use force_subclients\n", data->lm75[0]->addr);
1542                         err = -ENODEV;
1543                         goto ERROR_SC_1;
1544                 }
1545                 data->lm75[1] = i2c_new_dummy(adapter,
1546                                               0x48 + ((tmp >> 4) & 0x7));
1547         }
1548
1549         return 0;
1550
1551         /* Undo inits in case of errors */
1552
1553 ERROR_SC_1:
1554         if (data->lm75[0] != NULL)
1555                 i2c_unregister_device(data->lm75[0]);
1556 ERROR_SC_0:
1557         return err;
1558 }
1559
1560 /* Return 0 if detection is successful, -ENODEV otherwise */
1561 static int w83793_detect(struct i2c_client *client,
1562                          struct i2c_board_info *info)
1563 {
1564         u8 tmp, bank, chip_id;
1565         struct i2c_adapter *adapter = client->adapter;
1566         unsigned short address = client->addr;
1567
1568         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1569                 return -ENODEV;
1570         }
1571
1572         bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1573
1574         tmp = bank & 0x80 ? 0x5c : 0xa3;
1575         /* Check Winbond vendor ID */
1576         if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1577                 pr_debug("w83793: Detection failed at check vendor id\n");
1578                 return -ENODEV;
1579         }
1580
1581         /* If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1582            should match */
1583         if ((bank & 0x07) == 0
1584          && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1585             (address << 1)) {
1586                 pr_debug("w83793: Detection failed at check i2c addr\n");
1587                 return -ENODEV;
1588         }
1589
1590         /* Determine the chip type now */
1591         chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1592         if (chip_id != 0x7b)
1593                 return -ENODEV;
1594
1595         strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1596
1597         return 0;
1598 }
1599
1600 static int w83793_probe(struct i2c_client *client,
1601                         const struct i2c_device_id *id)
1602 {
1603         struct device *dev = &client->dev;
1604         const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1605         struct w83793_data *data;
1606         int i, tmp, val, err;
1607         int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1608         int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1609         int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1610
1611         data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1612         if (!data) {
1613                 err = -ENOMEM;
1614                 goto exit;
1615         }
1616
1617         i2c_set_clientdata(client, data);
1618         data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1619         mutex_init(&data->update_lock);
1620         mutex_init(&data->watchdog_lock);
1621         INIT_LIST_HEAD(&data->list);
1622         kref_init(&data->kref);
1623
1624         /* Store client pointer in our data struct for watchdog usage
1625            (where the client is found through a data ptr instead of the
1626            otherway around) */
1627         data->client = client;
1628
1629         err = w83793_detect_subclients(client);
1630         if (err)
1631                 goto free_mem;
1632
1633         /* Initialize the chip */
1634         w83793_init_client(client);
1635
1636         /*
1637            Only fan 1-5 has their own input pins,
1638            Pwm 1-3 has their own pins
1639          */
1640         data->has_fan = 0x1f;
1641         data->has_pwm = 0x07;
1642         tmp = w83793_read_value(client, W83793_REG_MFC);
1643         val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1644
1645         /* check the function of pins 49-56 */
1646         if (tmp & 0x80) {
1647                 data->has_vid |= 0x2;   /* has VIDB */
1648         } else {
1649                 data->has_pwm |= 0x18;  /* pwm 4,5 */
1650                 if (val & 0x01) {       /* fan 6 */
1651                         data->has_fan |= 0x20;
1652                         data->has_pwm |= 0x20;
1653                 }
1654                 if (val & 0x02) {       /* fan 7 */
1655                         data->has_fan |= 0x40;
1656                         data->has_pwm |= 0x40;
1657                 }
1658                 if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1659                         data->has_fan |= 0x80;
1660                         data->has_pwm |= 0x80;
1661                 }
1662         }
1663
1664         /* check the function of pins 37-40 */
1665         if (!(tmp & 0x29))
1666                 data->has_vid |= 0x1;   /* has VIDA */
1667         if (0x08 == (tmp & 0x0c)) {
1668                 if (val & 0x08) /* fan 9 */
1669                         data->has_fan |= 0x100;
1670                 if (val & 0x10) /* fan 10 */
1671                         data->has_fan |= 0x200;
1672         }
1673         if (0x20 == (tmp & 0x30)) {
1674                 if (val & 0x20) /* fan 11 */
1675                         data->has_fan |= 0x400;
1676                 if (val & 0x40) /* fan 12 */
1677                         data->has_fan |= 0x800;
1678         }
1679
1680         if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1681                 data->has_fan |= 0x80;
1682                 data->has_pwm |= 0x80;
1683         }
1684
1685         tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1686         if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1687                 data->has_fan |= 0x100;
1688         }
1689         if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1690                 data->has_fan |= 0x200;
1691         }
1692         if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1693                 data->has_fan |= 0x400;
1694         }
1695         if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1696                 data->has_fan |= 0x800;
1697         }
1698
1699         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1700         tmp = w83793_read_value(client,W83793_REG_TEMP_MODE[0]);
1701         if (tmp & 0x01)
1702                 data->has_temp |= 0x01;
1703         if (tmp & 0x04)
1704                 data->has_temp |= 0x02;
1705         if (tmp & 0x10)
1706                 data->has_temp |= 0x04;
1707         if (tmp & 0x40)
1708                 data->has_temp |= 0x08;
1709
1710         tmp = w83793_read_value(client,W83793_REG_TEMP_MODE[1]);
1711         if (tmp & 0x01)
1712                 data->has_temp |= 0x10;
1713         if (tmp & 0x02)
1714                 data->has_temp |= 0x20;
1715
1716         /* Register sysfs hooks */
1717         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1718                 err = device_create_file(dev,
1719                                          &w83793_sensor_attr_2[i].dev_attr);
1720                 if (err)
1721                         goto exit_remove;
1722         }
1723
1724         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1725                 if (!(data->has_vid & (1 << i)))
1726                         continue;
1727                 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1728                 if (err)
1729                         goto exit_remove;
1730         }
1731         if (data->has_vid) {
1732                 data->vrm = vid_which_vrm();
1733                 err = device_create_file(dev, &dev_attr_vrm);
1734                 if (err)
1735                         goto exit_remove;
1736         }
1737
1738         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1739                 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1740                 if (err)
1741                         goto exit_remove;
1742
1743         }
1744
1745         for (i = 0; i < 6; i++) {
1746                 int j;
1747                 if (!(data->has_temp & (1 << i)))
1748                         continue;
1749                 for (j = 0; j < files_temp; j++) {
1750                         err = device_create_file(dev,
1751                                                 &w83793_temp[(i) * files_temp
1752                                                                 + j].dev_attr);
1753                         if (err)
1754                                 goto exit_remove;
1755                 }
1756         }
1757
1758         for (i = 5; i < 12; i++) {
1759                 int j;
1760                 if (!(data->has_fan & (1 << i)))
1761                         continue;
1762                 for (j = 0; j < files_fan; j++) {
1763                         err = device_create_file(dev,
1764                                            &w83793_left_fan[(i - 5) * files_fan
1765                                                                 + j].dev_attr);
1766                         if (err)
1767                                 goto exit_remove;
1768                 }
1769         }
1770
1771         for (i = 3; i < 8; i++) {
1772                 int j;
1773                 if (!(data->has_pwm & (1 << i)))
1774                         continue;
1775                 for (j = 0; j < files_pwm; j++) {
1776                         err = device_create_file(dev,
1777                                            &w83793_left_pwm[(i - 3) * files_pwm
1778                                                                 + j].dev_attr);
1779                         if (err)
1780                                 goto exit_remove;
1781                 }
1782         }
1783
1784         data->hwmon_dev = hwmon_device_register(dev);
1785         if (IS_ERR(data->hwmon_dev)) {
1786                 err = PTR_ERR(data->hwmon_dev);
1787                 goto exit_remove;
1788         }
1789
1790         /* Watchdog initialization */
1791
1792         /* Register boot notifier */
1793         err = register_reboot_notifier(&watchdog_notifier);
1794         if (err != 0) {
1795                 dev_err(&client->dev,
1796                         "cannot register reboot notifier (err=%d)\n", err);
1797                 goto exit_devunreg;
1798         }
1799
1800         /* Enable Watchdog registers.
1801            Set Configuration Register to Enable Watch Dog Registers
1802            (Bit 2) = XXXX, X1XX. */
1803         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1804         w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1805
1806         /* Set the default watchdog timeout */
1807         data->watchdog_timeout = timeout;
1808
1809         /* Check, if last reboot was caused by watchdog */
1810         data->watchdog_caused_reboot =
1811           w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1812
1813         /* Disable Soft Watchdog during initialiation */
1814         watchdog_disable(data);
1815
1816         /* We take the data_mutex lock early so that watchdog_open() cannot
1817            run when misc_register() has completed, but we've not yet added
1818            our data to the watchdog_data_list (and set the default timeout) */
1819         mutex_lock(&watchdog_data_mutex);
1820         for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1821                 /* Register our watchdog part */
1822                 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1823                         "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1824                 data->watchdog_miscdev.name = data->watchdog_name;
1825                 data->watchdog_miscdev.fops = &watchdog_fops;
1826                 data->watchdog_miscdev.minor = watchdog_minors[i];
1827
1828                 err = misc_register(&data->watchdog_miscdev);
1829                 if (err == -EBUSY)
1830                         continue;
1831                 if (err) {
1832                         data->watchdog_miscdev.minor = 0;
1833                         dev_err(&client->dev,
1834                                 "Registering watchdog chardev: %d\n", err);
1835                         break;
1836                 }
1837
1838                 list_add(&data->list, &watchdog_data_list);
1839
1840                 dev_info(&client->dev,
1841                         "Registered watchdog chardev major 10, minor: %d\n",
1842                         watchdog_minors[i]);
1843                 break;
1844         }
1845         if (i == ARRAY_SIZE(watchdog_minors)) {
1846                 data->watchdog_miscdev.minor = 0;
1847                 dev_warn(&client->dev, "Couldn't register watchdog chardev "
1848                         "(due to no free minor)\n");
1849         }
1850
1851         mutex_unlock(&watchdog_data_mutex);
1852
1853         return 0;
1854
1855         /* Unregister hwmon device */
1856
1857 exit_devunreg:
1858
1859         hwmon_device_unregister(data->hwmon_dev);
1860
1861         /* Unregister sysfs hooks */
1862
1863 exit_remove:
1864         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1865                 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1866
1867         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1868                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1869
1870         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1871                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1872
1873         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1874                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1875
1876         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1877                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1878
1879         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1880                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1881
1882         if (data->lm75[0] != NULL)
1883                 i2c_unregister_device(data->lm75[0]);
1884         if (data->lm75[1] != NULL)
1885                 i2c_unregister_device(data->lm75[1]);
1886 free_mem:
1887         kfree(data);
1888 exit:
1889         return err;
1890 }
1891
1892 static void w83793_update_nonvolatile(struct device *dev)
1893 {
1894         struct i2c_client *client = to_i2c_client(dev);
1895         struct w83793_data *data = i2c_get_clientdata(client);
1896         int i, j;
1897         /*
1898            They are somewhat "stable" registers, and to update them everytime
1899            takes so much time, it's just not worthy. Update them in a long
1900            interval to avoid exception.
1901          */
1902         if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1903               || !data->valid))
1904                 return;
1905         /* update voltage limits */
1906         for (i = 1; i < 3; i++) {
1907                 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1908                         data->in[j][i] =
1909                             w83793_read_value(client, W83793_REG_IN[j][i]);
1910                 }
1911                 data->in_low_bits[i] =
1912                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1913         }
1914
1915         for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1916                 /* Update the Fan measured value and limits */
1917                 if (!(data->has_fan & (1 << i))) {
1918                         continue;
1919                 }
1920                 data->fan_min[i] =
1921                     w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1922                 data->fan_min[i] |=
1923                     w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1924         }
1925
1926         for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1927                 if (!(data->has_temp & (1 << i)))
1928                         continue;
1929                 data->temp_fan_map[i] =
1930                     w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
1931                 for (j = 1; j < 5; j++) {
1932                         data->temp[i][j] =
1933                             w83793_read_value(client, W83793_REG_TEMP[i][j]);
1934                 }
1935                 data->temp_cruise[i] =
1936                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
1937                 for (j = 0; j < 7; j++) {
1938                         data->sf2_pwm[i][j] =
1939                             w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
1940                         data->sf2_temp[i][j] =
1941                             w83793_read_value(client,
1942                                               W83793_REG_SF2_TEMP(i, j));
1943                 }
1944         }
1945
1946         for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
1947                 data->temp_mode[i] =
1948                     w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
1949
1950         for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
1951                 data->tolerance[i] =
1952                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
1953         }
1954
1955         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
1956                 if (!(data->has_pwm & (1 << i)))
1957                         continue;
1958                 data->pwm[i][PWM_NONSTOP] =
1959                     w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
1960                 data->pwm[i][PWM_START] =
1961                     w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
1962                 data->pwm_stop_time[i] =
1963                     w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
1964         }
1965
1966         data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
1967         data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
1968         data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
1969         data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
1970         data->temp_critical =
1971             w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
1972         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
1973
1974         for (i = 0; i < ARRAY_SIZE(data->beeps); i++) {
1975                 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
1976         }
1977
1978         data->last_nonvolatile = jiffies;
1979 }
1980
1981 static struct w83793_data *w83793_update_device(struct device *dev)
1982 {
1983         struct i2c_client *client = to_i2c_client(dev);
1984         struct w83793_data *data = i2c_get_clientdata(client);
1985         int i;
1986
1987         mutex_lock(&data->update_lock);
1988
1989         if (!(time_after(jiffies, data->last_updated + HZ * 2)
1990               || !data->valid))
1991                 goto END;
1992
1993         /* Update the voltages measured value and limits */
1994         for (i = 0; i < ARRAY_SIZE(data->in); i++)
1995                 data->in[i][IN_READ] =
1996                     w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
1997
1998         data->in_low_bits[IN_READ] =
1999             w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2000
2001         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2002                 if (!(data->has_fan & (1 << i))) {
2003                         continue;
2004                 }
2005                 data->fan[i] =
2006                     w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2007                 data->fan[i] |=
2008                     w83793_read_value(client, W83793_REG_FAN(i) + 1);
2009         }
2010
2011         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2012                 if (!(data->has_temp & (1 << i)))
2013                         continue;
2014                 data->temp[i][TEMP_READ] =
2015                     w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2016         }
2017
2018         data->temp_low_bits =
2019             w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2020
2021         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2022                 if (data->has_pwm & (1 << i))
2023                         data->pwm[i][PWM_DUTY] =
2024                             w83793_read_value(client,
2025                                               W83793_REG_PWM(i, PWM_DUTY));
2026         }
2027
2028         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2029                 data->alarms[i] =
2030                     w83793_read_value(client, W83793_REG_ALARM(i));
2031         if (data->has_vid & 0x01)
2032                 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2033         if (data->has_vid & 0x02)
2034                 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2035         w83793_update_nonvolatile(dev);
2036         data->last_updated = jiffies;
2037         data->valid = 1;
2038
2039 END:
2040         mutex_unlock(&data->update_lock);
2041         return data;
2042 }
2043
2044 /* Ignore the possibility that somebody change bank outside the driver
2045    Must be called with data->update_lock held, except during initialization */
2046 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2047 {
2048         struct w83793_data *data = i2c_get_clientdata(client);
2049         u8 res = 0xff;
2050         u8 new_bank = reg >> 8;
2051
2052         new_bank |= data->bank & 0xfc;
2053         if (data->bank != new_bank) {
2054                 if (i2c_smbus_write_byte_data
2055                     (client, W83793_REG_BANKSEL, new_bank) >= 0)
2056                         data->bank = new_bank;
2057                 else {
2058                         dev_err(&client->dev,
2059                                 "set bank to %d failed, fall back "
2060                                 "to bank %d, read reg 0x%x error\n",
2061                                 new_bank, data->bank, reg);
2062                         res = 0x0;      /* read 0x0 from the chip */
2063                         goto END;
2064                 }
2065         }
2066         res = i2c_smbus_read_byte_data(client, reg & 0xff);
2067 END:
2068         return res;
2069 }
2070
2071 /* Must be called with data->update_lock held, except during initialization */
2072 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2073 {
2074         struct w83793_data *data = i2c_get_clientdata(client);
2075         int res;
2076         u8 new_bank = reg >> 8;
2077
2078         new_bank |= data->bank & 0xfc;
2079         if (data->bank != new_bank) {
2080                 if ((res = i2c_smbus_write_byte_data
2081                     (client, W83793_REG_BANKSEL, new_bank)) >= 0)
2082                         data->bank = new_bank;
2083                 else {
2084                         dev_err(&client->dev,
2085                                 "set bank to %d failed, fall back "
2086                                 "to bank %d, write reg 0x%x error\n",
2087                                 new_bank, data->bank, reg);
2088                         goto END;
2089                 }
2090         }
2091
2092         res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2093 END:
2094         return res;
2095 }
2096
2097 static int __init sensors_w83793_init(void)
2098 {
2099         return i2c_add_driver(&w83793_driver);
2100 }
2101
2102 static void __exit sensors_w83793_exit(void)
2103 {
2104         i2c_del_driver(&w83793_driver);
2105 }
2106
2107 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2108 MODULE_DESCRIPTION("w83793 driver");
2109 MODULE_LICENSE("GPL");
2110
2111 module_init(sensors_w83793_init);
2112 module_exit(sensors_w83793_exit);