Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
[linux-2.6-microblaze.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 #include <linux/jiffies.h>
50
51 /* Default values */
52 #define WATCHDOG_TIMEOUT 2      /* 2 minute default timeout */
53
54 /* Addresses to scan */
55 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
56                                                 I2C_CLIENT_END };
57
58 /* Insmod parameters */
59
60 static unsigned short force_subclients[4];
61 module_param_array(force_subclients, short, NULL, 0);
62 MODULE_PARM_DESC(force_subclients,
63                  "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
64
65 static bool reset;
66 module_param(reset, bool, 0);
67 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
68
69 static int timeout = WATCHDOG_TIMEOUT;  /* default timeout in minutes */
70 module_param(timeout, int, 0);
71 MODULE_PARM_DESC(timeout,
72         "Watchdog timeout in minutes. 2<= timeout <=255 (default="
73                                 __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
74
75 static bool nowayout = WATCHDOG_NOWAYOUT;
76 module_param(nowayout, bool, 0);
77 MODULE_PARM_DESC(nowayout,
78         "Watchdog cannot be stopped once started (default="
79                                 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
80
81 /*
82  * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
83  * as ID, Bank Select registers
84  */
85 #define W83793_REG_BANKSEL              0x00
86 #define W83793_REG_VENDORID             0x0d
87 #define W83793_REG_CHIPID               0x0e
88 #define W83793_REG_DEVICEID             0x0f
89
90 #define W83793_REG_CONFIG               0x40
91 #define W83793_REG_MFC                  0x58
92 #define W83793_REG_FANIN_CTRL           0x5c
93 #define W83793_REG_FANIN_SEL            0x5d
94 #define W83793_REG_I2C_ADDR             0x0b
95 #define W83793_REG_I2C_SUBADDR          0x0c
96 #define W83793_REG_VID_INA              0x05
97 #define W83793_REG_VID_INB              0x06
98 #define W83793_REG_VID_LATCHA           0x07
99 #define W83793_REG_VID_LATCHB           0x08
100 #define W83793_REG_VID_CTRL             0x59
101
102 #define W83793_REG_WDT_LOCK             0x01
103 #define W83793_REG_WDT_ENABLE           0x02
104 #define W83793_REG_WDT_STATUS           0x03
105 #define W83793_REG_WDT_TIMEOUT          0x04
106
107 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
108
109 #define TEMP_READ       0
110 #define TEMP_CRIT       1
111 #define TEMP_CRIT_HYST  2
112 #define TEMP_WARN       3
113 #define TEMP_WARN_HYST  4
114 /*
115  * only crit and crit_hyst affect real-time alarm status
116  * current crit crit_hyst warn warn_hyst
117  */
118 static u16 W83793_REG_TEMP[][5] = {
119         {0x1c, 0x78, 0x79, 0x7a, 0x7b},
120         {0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
121         {0x1e, 0x80, 0x81, 0x82, 0x83},
122         {0x1f, 0x84, 0x85, 0x86, 0x87},
123         {0x20, 0x88, 0x89, 0x8a, 0x8b},
124         {0x21, 0x8c, 0x8d, 0x8e, 0x8f},
125 };
126
127 #define W83793_REG_TEMP_LOW_BITS        0x22
128
129 #define W83793_REG_BEEP(index)          (0x53 + (index))
130 #define W83793_REG_ALARM(index)         (0x4b + (index))
131
132 #define W83793_REG_CLR_CHASSIS          0x4a    /* SMI MASK4 */
133 #define W83793_REG_IRQ_CTRL             0x50
134 #define W83793_REG_OVT_CTRL             0x51
135 #define W83793_REG_OVT_BEEP             0x52
136
137 #define IN_READ                         0
138 #define IN_MAX                          1
139 #define IN_LOW                          2
140 static const u16 W83793_REG_IN[][3] = {
141         /* Current, High, Low */
142         {0x10, 0x60, 0x61},     /* Vcore A      */
143         {0x11, 0x62, 0x63},     /* Vcore B      */
144         {0x12, 0x64, 0x65},     /* Vtt          */
145         {0x14, 0x6a, 0x6b},     /* VSEN1        */
146         {0x15, 0x6c, 0x6d},     /* VSEN2        */
147         {0x16, 0x6e, 0x6f},     /* +3VSEN       */
148         {0x17, 0x70, 0x71},     /* +12VSEN      */
149         {0x18, 0x72, 0x73},     /* 5VDD         */
150         {0x19, 0x74, 0x75},     /* 5VSB         */
151         {0x1a, 0x76, 0x77},     /* VBAT         */
152 };
153
154 /* Low Bits of Vcore A/B Vtt Read/High/Low */
155 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
156 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
157 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
158
159 #define W83793_REG_FAN(index)           (0x23 + 2 * (index))    /* High byte */
160 #define W83793_REG_FAN_MIN(index)       (0x90 + 2 * (index))    /* High byte */
161
162 #define W83793_REG_PWM_DEFAULT          0xb2
163 #define W83793_REG_PWM_ENABLE           0x207
164 #define W83793_REG_PWM_UPTIME           0xc3    /* Unit in 0.1 second */
165 #define W83793_REG_PWM_DOWNTIME         0xc4    /* Unit in 0.1 second */
166 #define W83793_REG_TEMP_CRITICAL        0xc5
167
168 #define PWM_DUTY                        0
169 #define PWM_START                       1
170 #define PWM_NONSTOP                     2
171 #define PWM_STOP_TIME                   3
172 #define W83793_REG_PWM(index, nr)       (((nr) == 0 ? 0xb3 : \
173                                          (nr) == 1 ? 0x220 : 0x218) + (index))
174
175 /* bit field, fan1 is bit0, fan2 is bit1 ... */
176 #define W83793_REG_TEMP_FAN_MAP(index)  (0x201 + (index))
177 #define W83793_REG_TEMP_TOL(index)      (0x208 + (index))
178 #define W83793_REG_TEMP_CRUISE(index)   (0x210 + (index))
179 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
180 #define W83793_REG_SF2_TEMP(index, nr)  (0x230 + ((index) << 4) + (nr))
181 #define W83793_REG_SF2_PWM(index, nr)   (0x238 + ((index) << 4) + (nr))
182
183 static inline unsigned long FAN_FROM_REG(u16 val)
184 {
185         if ((val >= 0xfff) || (val == 0))
186                 return  0;
187         return 1350000UL / val;
188 }
189
190 static inline u16 FAN_TO_REG(long rpm)
191 {
192         if (rpm <= 0)
193                 return 0x0fff;
194         return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
195 }
196
197 static inline unsigned long TIME_FROM_REG(u8 reg)
198 {
199         return reg * 100;
200 }
201
202 static inline u8 TIME_TO_REG(unsigned long val)
203 {
204         return clamp_val((val + 50) / 100, 0, 0xff);
205 }
206
207 static inline long TEMP_FROM_REG(s8 reg)
208 {
209         return reg * 1000;
210 }
211
212 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
213 {
214         return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max);
215 }
216
217 struct w83793_data {
218         struct i2c_client *lm75[2];
219         struct device *hwmon_dev;
220         struct mutex update_lock;
221         char valid;                     /* !=0 if following fields are valid */
222         unsigned long last_updated;     /* In jiffies */
223         unsigned long last_nonvolatile; /* In jiffies, last time we update the
224                                          * nonvolatile registers
225                                          */
226
227         u8 bank;
228         u8 vrm;
229         u8 vid[2];
230         u8 in[10][3];           /* Register value, read/high/low */
231         u8 in_low_bits[3];      /* Additional resolution for VCore A/B Vtt */
232
233         u16 has_fan;            /* Only fan1- fan5 has own pins */
234         u16 fan[12];            /* Register value combine */
235         u16 fan_min[12];        /* Register value combine */
236
237         s8 temp[6][5];          /* current, crit, crit_hyst,warn, warn_hyst */
238         u8 temp_low_bits;       /* Additional resolution TD1-TD4 */
239         u8 temp_mode[2];        /* byte 0: Temp D1-D4 mode each has 2 bits
240                                  * byte 1: Temp R1,R2 mode, each has 1 bit
241                                  */
242         u8 temp_critical;       /* If reached all fan will be at full speed */
243         u8 temp_fan_map[6];     /* Temp controls which pwm fan, bit field */
244
245         u8 has_pwm;
246         u8 has_temp;
247         u8 has_vid;
248         u8 pwm_enable;          /* Register value, each Temp has 1 bit */
249         u8 pwm_uptime;          /* Register value */
250         u8 pwm_downtime;        /* Register value */
251         u8 pwm_default;         /* All fan default pwm, next poweron valid */
252         u8 pwm[8][3];           /* Register value */
253         u8 pwm_stop_time[8];
254         u8 temp_cruise[6];
255
256         u8 alarms[5];           /* realtime status registers */
257         u8 beeps[5];
258         u8 beep_enable;
259         u8 tolerance[3];        /* Temp tolerance(Smart Fan I/II) */
260         u8 sf2_pwm[6][7];       /* Smart FanII: Fan duty cycle */
261         u8 sf2_temp[6][7];      /* Smart FanII: Temp level point */
262
263         /* watchdog */
264         struct i2c_client *client;
265         struct mutex watchdog_lock;
266         struct list_head list; /* member of the watchdog_data_list */
267         struct kref kref;
268         struct miscdevice watchdog_miscdev;
269         unsigned long watchdog_is_open;
270         char watchdog_expect_close;
271         char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
272         unsigned int watchdog_caused_reboot;
273         int watchdog_timeout; /* watchdog timeout in minutes */
274 };
275
276 /*
277  * Somewhat ugly :( global data pointer list with all devices, so that
278  * we can find our device data as when using misc_register. There is no
279  * other method to get to one's device data from the open file-op and
280  * for usage in the reboot notifier callback.
281  */
282 static LIST_HEAD(watchdog_data_list);
283
284 /* Note this lock not only protect list access, but also data.kref access */
285 static DEFINE_MUTEX(watchdog_data_mutex);
286
287 /*
288  * Release our data struct when we're detached from the i2c client *and* all
289  * references to our watchdog device are released
290  */
291 static void w83793_release_resources(struct kref *ref)
292 {
293         struct w83793_data *data = container_of(ref, struct w83793_data, kref);
294         kfree(data);
295 }
296
297 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
298 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
299 static int w83793_probe(struct i2c_client *client,
300                         const struct i2c_device_id *id);
301 static int w83793_detect(struct i2c_client *client,
302                          struct i2c_board_info *info);
303 static int w83793_remove(struct i2c_client *client);
304 static void w83793_init_client(struct i2c_client *client);
305 static void w83793_update_nonvolatile(struct device *dev);
306 static struct w83793_data *w83793_update_device(struct device *dev);
307
308 static const struct i2c_device_id w83793_id[] = {
309         { "w83793", 0 },
310         { }
311 };
312 MODULE_DEVICE_TABLE(i2c, w83793_id);
313
314 static struct i2c_driver w83793_driver = {
315         .class          = I2C_CLASS_HWMON,
316         .driver = {
317                    .name = "w83793",
318         },
319         .probe          = w83793_probe,
320         .remove         = w83793_remove,
321         .id_table       = w83793_id,
322         .detect         = w83793_detect,
323         .address_list   = normal_i2c,
324 };
325
326 static ssize_t
327 show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
328 {
329         struct w83793_data *data = dev_get_drvdata(dev);
330         return sprintf(buf, "%d\n", data->vrm);
331 }
332
333 static ssize_t
334 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
335 {
336         struct w83793_data *data = w83793_update_device(dev);
337         struct sensor_device_attribute_2 *sensor_attr =
338             to_sensor_dev_attr_2(attr);
339         int index = sensor_attr->index;
340
341         return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
342 }
343
344 static ssize_t
345 store_vrm(struct device *dev, struct device_attribute *attr,
346           const char *buf, size_t count)
347 {
348         struct w83793_data *data = dev_get_drvdata(dev);
349         unsigned long val;
350         int err;
351
352         err = kstrtoul(buf, 10, &val);
353         if (err)
354                 return err;
355
356         if (val > 255)
357                 return -EINVAL;
358
359         data->vrm = val;
360         return count;
361 }
362
363 #define ALARM_STATUS                    0
364 #define BEEP_ENABLE                     1
365 static ssize_t
366 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
367 {
368         struct w83793_data *data = w83793_update_device(dev);
369         struct sensor_device_attribute_2 *sensor_attr =
370             to_sensor_dev_attr_2(attr);
371         int nr = sensor_attr->nr;
372         int index = sensor_attr->index >> 3;
373         int bit = sensor_attr->index & 0x07;
374         u8 val;
375
376         if (nr == ALARM_STATUS) {
377                 val = (data->alarms[index] >> (bit)) & 1;
378         } else {                /* BEEP_ENABLE */
379                 val = (data->beeps[index] >> (bit)) & 1;
380         }
381
382         return sprintf(buf, "%u\n", val);
383 }
384
385 static ssize_t
386 store_beep(struct device *dev, struct device_attribute *attr,
387            const char *buf, size_t count)
388 {
389         struct i2c_client *client = to_i2c_client(dev);
390         struct w83793_data *data = i2c_get_clientdata(client);
391         struct sensor_device_attribute_2 *sensor_attr =
392             to_sensor_dev_attr_2(attr);
393         int index = sensor_attr->index >> 3;
394         int shift = sensor_attr->index & 0x07;
395         u8 beep_bit = 1 << shift;
396         unsigned long val;
397         int err;
398
399         err = kstrtoul(buf, 10, &val);
400         if (err)
401                 return err;
402
403         if (val > 1)
404                 return -EINVAL;
405
406         mutex_lock(&data->update_lock);
407         data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
408         data->beeps[index] &= ~beep_bit;
409         data->beeps[index] |= val << shift;
410         w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
411         mutex_unlock(&data->update_lock);
412
413         return count;
414 }
415
416 static ssize_t
417 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
418 {
419         struct w83793_data *data = w83793_update_device(dev);
420         return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
421 }
422
423 static ssize_t
424 store_beep_enable(struct device *dev, struct device_attribute *attr,
425                   const char *buf, size_t count)
426 {
427         struct i2c_client *client = to_i2c_client(dev);
428         struct w83793_data *data = i2c_get_clientdata(client);
429         unsigned long val;
430         int err;
431
432         err = kstrtoul(buf, 10, &val);
433         if (err)
434                 return err;
435
436         if (val > 1)
437                 return -EINVAL;
438
439         mutex_lock(&data->update_lock);
440         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
441                             & 0xfd;
442         data->beep_enable |= val << 1;
443         w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
444         mutex_unlock(&data->update_lock);
445
446         return count;
447 }
448
449 /* Write 0 to clear chassis alarm */
450 static ssize_t
451 store_chassis_clear(struct device *dev,
452                     struct device_attribute *attr, const char *buf,
453                     size_t count)
454 {
455         struct i2c_client *client = to_i2c_client(dev);
456         struct w83793_data *data = i2c_get_clientdata(client);
457         unsigned long val;
458         u8 reg;
459         int err;
460
461         err = kstrtoul(buf, 10, &val);
462         if (err)
463                 return err;
464         if (val)
465                 return -EINVAL;
466
467         mutex_lock(&data->update_lock);
468         reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
469         w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
470         data->valid = 0;                /* Force cache refresh */
471         mutex_unlock(&data->update_lock);
472         return count;
473 }
474
475 #define FAN_INPUT                       0
476 #define FAN_MIN                         1
477 static ssize_t
478 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
479 {
480         struct sensor_device_attribute_2 *sensor_attr =
481             to_sensor_dev_attr_2(attr);
482         int nr = sensor_attr->nr;
483         int index = sensor_attr->index;
484         struct w83793_data *data = w83793_update_device(dev);
485         u16 val;
486
487         if (nr == FAN_INPUT)
488                 val = data->fan[index] & 0x0fff;
489         else
490                 val = data->fan_min[index] & 0x0fff;
491
492         return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
493 }
494
495 static ssize_t
496 store_fan_min(struct device *dev, struct device_attribute *attr,
497               const char *buf, size_t count)
498 {
499         struct sensor_device_attribute_2 *sensor_attr =
500             to_sensor_dev_attr_2(attr);
501         int index = sensor_attr->index;
502         struct i2c_client *client = to_i2c_client(dev);
503         struct w83793_data *data = i2c_get_clientdata(client);
504         unsigned long val;
505         int err;
506
507         err = kstrtoul(buf, 10, &val);
508         if (err)
509                 return err;
510         val = FAN_TO_REG(val);
511
512         mutex_lock(&data->update_lock);
513         data->fan_min[index] = val;
514         w83793_write_value(client, W83793_REG_FAN_MIN(index),
515                            (val >> 8) & 0xff);
516         w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
517         mutex_unlock(&data->update_lock);
518
519         return count;
520 }
521
522 static ssize_t
523 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
524 {
525         struct sensor_device_attribute_2 *sensor_attr =
526             to_sensor_dev_attr_2(attr);
527         struct w83793_data *data = w83793_update_device(dev);
528         u16 val;
529         int nr = sensor_attr->nr;
530         int index = sensor_attr->index;
531
532         if (nr == PWM_STOP_TIME)
533                 val = TIME_FROM_REG(data->pwm_stop_time[index]);
534         else
535                 val = (data->pwm[index][nr] & 0x3f) << 2;
536
537         return sprintf(buf, "%d\n", val);
538 }
539
540 static ssize_t
541 store_pwm(struct device *dev, struct device_attribute *attr,
542           const char *buf, size_t count)
543 {
544         struct i2c_client *client = to_i2c_client(dev);
545         struct w83793_data *data = i2c_get_clientdata(client);
546         struct sensor_device_attribute_2 *sensor_attr =
547             to_sensor_dev_attr_2(attr);
548         int nr = sensor_attr->nr;
549         int index = sensor_attr->index;
550         unsigned long val;
551         int err;
552
553         err = kstrtoul(buf, 10, &val);
554         if (err)
555                 return err;
556
557         mutex_lock(&data->update_lock);
558         if (nr == PWM_STOP_TIME) {
559                 val = TIME_TO_REG(val);
560                 data->pwm_stop_time[index] = val;
561                 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
562                                    val);
563         } else {
564                 val = clamp_val(val, 0, 0xff) >> 2;
565                 data->pwm[index][nr] =
566                     w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
567                 data->pwm[index][nr] |= val;
568                 w83793_write_value(client, W83793_REG_PWM(index, nr),
569                                                         data->pwm[index][nr]);
570         }
571
572         mutex_unlock(&data->update_lock);
573         return count;
574 }
575
576 static ssize_t
577 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
578 {
579         struct sensor_device_attribute_2 *sensor_attr =
580             to_sensor_dev_attr_2(attr);
581         int nr = sensor_attr->nr;
582         int index = sensor_attr->index;
583         struct w83793_data *data = w83793_update_device(dev);
584         long temp = TEMP_FROM_REG(data->temp[index][nr]);
585
586         if (nr == TEMP_READ && index < 4) {     /* Only TD1-TD4 have low bits */
587                 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
588                 temp += temp > 0 ? low : -low;
589         }
590         return sprintf(buf, "%ld\n", temp);
591 }
592
593 static ssize_t
594 store_temp(struct device *dev, struct device_attribute *attr,
595            const char *buf, size_t count)
596 {
597         struct sensor_device_attribute_2 *sensor_attr =
598             to_sensor_dev_attr_2(attr);
599         int nr = sensor_attr->nr;
600         int index = sensor_attr->index;
601         struct i2c_client *client = to_i2c_client(dev);
602         struct w83793_data *data = i2c_get_clientdata(client);
603         long tmp;
604         int err;
605
606         err = kstrtol(buf, 10, &tmp);
607         if (err)
608                 return err;
609
610         mutex_lock(&data->update_lock);
611         data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
612         w83793_write_value(client, W83793_REG_TEMP[index][nr],
613                            data->temp[index][nr]);
614         mutex_unlock(&data->update_lock);
615         return count;
616 }
617
618 /*
619  * TD1-TD4
620  * each has 4 mode:(2 bits)
621  * 0:   Stop monitor
622  * 1:   Use internal temp sensor(default)
623  * 2:   Reserved
624  * 3:   Use sensor in Intel CPU and get result by PECI
625  *
626  * TR1-TR2
627  * each has 2 mode:(1 bit)
628  * 0:   Disable temp sensor monitor
629  * 1:   To enable temp sensors monitor
630  */
631
632 /* 0 disable, 6 PECI */
633 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
634
635 static ssize_t
636 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
637 {
638         struct w83793_data *data = w83793_update_device(dev);
639         struct sensor_device_attribute_2 *sensor_attr =
640             to_sensor_dev_attr_2(attr);
641         int index = sensor_attr->index;
642         u8 mask = (index < 4) ? 0x03 : 0x01;
643         u8 shift = (index < 4) ? (2 * index) : (index - 4);
644         u8 tmp;
645         index = (index < 4) ? 0 : 1;
646
647         tmp = (data->temp_mode[index] >> shift) & mask;
648
649         /* for the internal sensor, found out if diode or thermistor */
650         if (tmp == 1)
651                 tmp = index == 0 ? 3 : 4;
652         else
653                 tmp = TO_TEMP_MODE[tmp];
654
655         return sprintf(buf, "%d\n", tmp);
656 }
657
658 static ssize_t
659 store_temp_mode(struct device *dev, struct device_attribute *attr,
660                 const char *buf, size_t count)
661 {
662         struct i2c_client *client = to_i2c_client(dev);
663         struct w83793_data *data = i2c_get_clientdata(client);
664         struct sensor_device_attribute_2 *sensor_attr =
665             to_sensor_dev_attr_2(attr);
666         int index = sensor_attr->index;
667         u8 mask = (index < 4) ? 0x03 : 0x01;
668         u8 shift = (index < 4) ? (2 * index) : (index - 4);
669         unsigned long val;
670         int err;
671
672         err = kstrtoul(buf, 10, &val);
673         if (err)
674                 return err;
675
676         /* transform the sysfs interface values into table above */
677         if ((val == 6) && (index < 4)) {
678                 val -= 3;
679         } else if ((val == 3 && index < 4)
680                 || (val == 4 && index >= 4)) {
681                 /* transform diode or thermistor into internal enable */
682                 val = !!val;
683         } else {
684                 return -EINVAL;
685         }
686
687         index = (index < 4) ? 0 : 1;
688         mutex_lock(&data->update_lock);
689         data->temp_mode[index] =
690             w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
691         data->temp_mode[index] &= ~(mask << shift);
692         data->temp_mode[index] |= val << shift;
693         w83793_write_value(client, W83793_REG_TEMP_MODE[index],
694                                                         data->temp_mode[index]);
695         mutex_unlock(&data->update_lock);
696
697         return count;
698 }
699
700 #define SETUP_PWM_DEFAULT               0
701 #define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
702 #define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
703 #define SETUP_TEMP_CRITICAL             3
704 static ssize_t
705 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
706 {
707         struct sensor_device_attribute_2 *sensor_attr =
708             to_sensor_dev_attr_2(attr);
709         int nr = sensor_attr->nr;
710         struct w83793_data *data = w83793_update_device(dev);
711         u32 val = 0;
712
713         if (nr == SETUP_PWM_DEFAULT)
714                 val = (data->pwm_default & 0x3f) << 2;
715         else if (nr == SETUP_PWM_UPTIME)
716                 val = TIME_FROM_REG(data->pwm_uptime);
717         else if (nr == SETUP_PWM_DOWNTIME)
718                 val = TIME_FROM_REG(data->pwm_downtime);
719         else if (nr == SETUP_TEMP_CRITICAL)
720                 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
721
722         return sprintf(buf, "%d\n", val);
723 }
724
725 static ssize_t
726 store_sf_setup(struct device *dev, struct device_attribute *attr,
727                const char *buf, size_t count)
728 {
729         struct sensor_device_attribute_2 *sensor_attr =
730             to_sensor_dev_attr_2(attr);
731         int nr = sensor_attr->nr;
732         struct i2c_client *client = to_i2c_client(dev);
733         struct w83793_data *data = i2c_get_clientdata(client);
734         long val;
735         int err;
736
737         err = kstrtol(buf, 10, &val);
738         if (err)
739                 return err;
740
741         mutex_lock(&data->update_lock);
742         if (nr == SETUP_PWM_DEFAULT) {
743                 data->pwm_default =
744                     w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
745                 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
746                 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
747                                                         data->pwm_default);
748         } else if (nr == SETUP_PWM_UPTIME) {
749                 data->pwm_uptime = TIME_TO_REG(val);
750                 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
751                 w83793_write_value(client, W83793_REG_PWM_UPTIME,
752                                                         data->pwm_uptime);
753         } else if (nr == SETUP_PWM_DOWNTIME) {
754                 data->pwm_downtime = TIME_TO_REG(val);
755                 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
756                 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
757                                                         data->pwm_downtime);
758         } else {                /* SETUP_TEMP_CRITICAL */
759                 data->temp_critical =
760                     w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
761                 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
762                 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
763                                                         data->temp_critical);
764         }
765
766         mutex_unlock(&data->update_lock);
767         return count;
768 }
769
770 /*
771  * Temp SmartFan control
772  * TEMP_FAN_MAP
773  * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
774  * It's possible two or more temp channels control the same fan, w83793
775  * always prefers to pick the most critical request and applies it to
776  * the related Fan.
777  * It's possible one fan is not in any mapping of 6 temp channels, this
778  * means the fan is manual mode
779  *
780  * TEMP_PWM_ENABLE
781  * Each temp channel has its own SmartFan mode, and temp channel
782  * control fans that are set by TEMP_FAN_MAP
783  * 0:   SmartFanII mode
784  * 1:   Thermal Cruise Mode
785  *
786  * TEMP_CRUISE
787  * Target temperature in thermal cruise mode, w83793 will try to turn
788  * fan speed to keep the temperature of target device around this
789  * temperature.
790  *
791  * TEMP_TOLERANCE
792  * If Temp higher or lower than target with this tolerance, w83793
793  * will take actions to speed up or slow down the fan to keep the
794  * temperature within the tolerance range.
795  */
796
797 #define TEMP_FAN_MAP                    0
798 #define TEMP_PWM_ENABLE                 1
799 #define TEMP_CRUISE                     2
800 #define TEMP_TOLERANCE                  3
801 static ssize_t
802 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
803 {
804         struct sensor_device_attribute_2 *sensor_attr =
805             to_sensor_dev_attr_2(attr);
806         int nr = sensor_attr->nr;
807         int index = sensor_attr->index;
808         struct w83793_data *data = w83793_update_device(dev);
809         u32 val;
810
811         if (nr == TEMP_FAN_MAP) {
812                 val = data->temp_fan_map[index];
813         } else if (nr == TEMP_PWM_ENABLE) {
814                 /* +2 to transform into 2 and 3 to conform with sysfs intf */
815                 val = ((data->pwm_enable >> index) & 0x01) + 2;
816         } else if (nr == TEMP_CRUISE) {
817                 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
818         } else {                /* TEMP_TOLERANCE */
819                 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
820                 val = TEMP_FROM_REG(val & 0x0f);
821         }
822         return sprintf(buf, "%d\n", val);
823 }
824
825 static ssize_t
826 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
827               const char *buf, size_t count)
828 {
829         struct sensor_device_attribute_2 *sensor_attr =
830             to_sensor_dev_attr_2(attr);
831         int nr = sensor_attr->nr;
832         int index = sensor_attr->index;
833         struct i2c_client *client = to_i2c_client(dev);
834         struct w83793_data *data = i2c_get_clientdata(client);
835         long val;
836         int err;
837
838         err = kstrtol(buf, 10, &val);
839         if (err)
840                 return err;
841
842         mutex_lock(&data->update_lock);
843         if (nr == TEMP_FAN_MAP) {
844                 val = clamp_val(val, 0, 255);
845                 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
846                 data->temp_fan_map[index] = val;
847         } else if (nr == TEMP_PWM_ENABLE) {
848                 if (val == 2 || val == 3) {
849                         data->pwm_enable =
850                             w83793_read_value(client, W83793_REG_PWM_ENABLE);
851                         if (val - 2)
852                                 data->pwm_enable |= 1 << index;
853                         else
854                                 data->pwm_enable &= ~(1 << index);
855                         w83793_write_value(client, W83793_REG_PWM_ENABLE,
856                                                         data->pwm_enable);
857                 } else {
858                         mutex_unlock(&data->update_lock);
859                         return -EINVAL;
860                 }
861         } else if (nr == TEMP_CRUISE) {
862                 data->temp_cruise[index] =
863                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
864                 data->temp_cruise[index] &= 0x80;
865                 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
866
867                 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
868                                                 data->temp_cruise[index]);
869         } else {                /* TEMP_TOLERANCE */
870                 int i = index >> 1;
871                 u8 shift = (index & 0x01) ? 4 : 0;
872                 data->tolerance[i] =
873                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
874
875                 data->tolerance[i] &= ~(0x0f << shift);
876                 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
877                 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
878                                                         data->tolerance[i]);
879         }
880
881         mutex_unlock(&data->update_lock);
882         return count;
883 }
884
885 static ssize_t
886 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
887 {
888         struct sensor_device_attribute_2 *sensor_attr =
889             to_sensor_dev_attr_2(attr);
890         int nr = sensor_attr->nr;
891         int index = sensor_attr->index;
892         struct w83793_data *data = w83793_update_device(dev);
893
894         return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
895 }
896
897 static ssize_t
898 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
899               const char *buf, size_t count)
900 {
901         struct i2c_client *client = to_i2c_client(dev);
902         struct w83793_data *data = i2c_get_clientdata(client);
903         struct sensor_device_attribute_2 *sensor_attr =
904             to_sensor_dev_attr_2(attr);
905         int nr = sensor_attr->nr;
906         int index = sensor_attr->index;
907         unsigned long val;
908         int err;
909
910         err = kstrtoul(buf, 10, &val);
911         if (err)
912                 return err;
913         val = clamp_val(val, 0, 0xff) >> 2;
914
915         mutex_lock(&data->update_lock);
916         data->sf2_pwm[index][nr] =
917             w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
918         data->sf2_pwm[index][nr] |= val;
919         w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
920                                                 data->sf2_pwm[index][nr]);
921         mutex_unlock(&data->update_lock);
922         return count;
923 }
924
925 static ssize_t
926 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
927 {
928         struct sensor_device_attribute_2 *sensor_attr =
929             to_sensor_dev_attr_2(attr);
930         int nr = sensor_attr->nr;
931         int index = sensor_attr->index;
932         struct w83793_data *data = w83793_update_device(dev);
933
934         return sprintf(buf, "%ld\n",
935                        TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
936 }
937
938 static ssize_t
939 store_sf2_temp(struct device *dev, struct device_attribute *attr,
940                const char *buf, size_t count)
941 {
942         struct i2c_client *client = to_i2c_client(dev);
943         struct w83793_data *data = i2c_get_clientdata(client);
944         struct sensor_device_attribute_2 *sensor_attr =
945             to_sensor_dev_attr_2(attr);
946         int nr = sensor_attr->nr;
947         int index = sensor_attr->index;
948         long val;
949         int err;
950
951         err = kstrtol(buf, 10, &val);
952         if (err)
953                 return err;
954         val = TEMP_TO_REG(val, 0, 0x7f);
955
956         mutex_lock(&data->update_lock);
957         data->sf2_temp[index][nr] =
958             w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
959         data->sf2_temp[index][nr] |= val;
960         w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
961                                              data->sf2_temp[index][nr]);
962         mutex_unlock(&data->update_lock);
963         return count;
964 }
965
966 /* only Vcore A/B and Vtt have additional 2 bits precision */
967 static ssize_t
968 show_in(struct device *dev, struct device_attribute *attr, char *buf)
969 {
970         struct sensor_device_attribute_2 *sensor_attr =
971             to_sensor_dev_attr_2(attr);
972         int nr = sensor_attr->nr;
973         int index = sensor_attr->index;
974         struct w83793_data *data = w83793_update_device(dev);
975         u16 val = data->in[index][nr];
976
977         if (index < 3) {
978                 val <<= 2;
979                 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
980         }
981         /* voltage inputs 5VDD and 5VSB needs 150mV offset */
982         val = val * scale_in[index] + scale_in_add[index];
983         return sprintf(buf, "%d\n", val);
984 }
985
986 static ssize_t
987 store_in(struct device *dev, struct device_attribute *attr,
988          const char *buf, size_t count)
989 {
990         struct sensor_device_attribute_2 *sensor_attr =
991             to_sensor_dev_attr_2(attr);
992         int nr = sensor_attr->nr;
993         int index = sensor_attr->index;
994         struct i2c_client *client = to_i2c_client(dev);
995         struct w83793_data *data = i2c_get_clientdata(client);
996         unsigned long val;
997         int err;
998
999         err = kstrtoul(buf, 10, &val);
1000         if (err)
1001                 return err;
1002         val = (val + scale_in[index] / 2) / scale_in[index];
1003
1004         mutex_lock(&data->update_lock);
1005         if (index > 2) {
1006                 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
1007                 if (nr == 1 || nr == 2)
1008                         val -= scale_in_add[index] / scale_in[index];
1009                 val = clamp_val(val, 0, 255);
1010         } else {
1011                 val = clamp_val(val, 0, 0x3FF);
1012                 data->in_low_bits[nr] =
1013                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1014                 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1015                 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1016                 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1017                                                      data->in_low_bits[nr]);
1018                 val >>= 2;
1019         }
1020         data->in[index][nr] = val;
1021         w83793_write_value(client, W83793_REG_IN[index][nr],
1022                                                         data->in[index][nr]);
1023         mutex_unlock(&data->update_lock);
1024         return count;
1025 }
1026
1027 #define NOT_USED                        -1
1028
1029 #define SENSOR_ATTR_IN(index)                                           \
1030         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1031                 IN_READ, index),                                        \
1032         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1033                 store_in, IN_MAX, index),                               \
1034         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1035                 store_in, IN_LOW, index),                               \
1036         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1037                 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
1038         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1039                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1040                 index + ((index > 2) ? 1 : 0))
1041
1042 #define SENSOR_ATTR_FAN(index)                                          \
1043         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1044                 NULL, ALARM_STATUS, index + 17),                        \
1045         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1046                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
1047         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1048                 NULL, FAN_INPUT, index - 1),                            \
1049         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1050                 show_fan, store_fan_min, FAN_MIN, index - 1)
1051
1052 #define SENSOR_ATTR_PWM(index)                                          \
1053         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1054                 store_pwm, PWM_DUTY, index - 1),                        \
1055         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1056                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1057         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1058                 show_pwm, store_pwm, PWM_START, index - 1),             \
1059         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1060                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1061
1062 #define SENSOR_ATTR_TEMP(index)                                         \
1063         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1064                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1065         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1066                 NULL, TEMP_READ, index - 1),                            \
1067         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1068                 store_temp, TEMP_CRIT, index - 1),                      \
1069         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1070                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1071         SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1072                 store_temp, TEMP_WARN, index - 1),                      \
1073         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1074                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1075         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1076                 show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1077         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1078                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1079         SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1080                 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1081                 TEMP_FAN_MAP, index - 1),                               \
1082         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1083                 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1084                 index - 1),                                             \
1085         SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1086                 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1087         SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1088                 store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1089         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1090                 show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1091         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1092                 show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1093         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1094                 show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1095         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1096                 show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1097         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1098                 show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1099         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1100                 show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1101         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1102                 show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1103         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1104                 show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1105         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1106                 show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1107         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1108                 show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1109         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1110                 show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1111         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1112                 show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1113         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1114                 show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1115         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1116                 show_sf2_temp, store_sf2_temp, 6, index - 1)
1117
1118 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1119         SENSOR_ATTR_IN(0),
1120         SENSOR_ATTR_IN(1),
1121         SENSOR_ATTR_IN(2),
1122         SENSOR_ATTR_IN(3),
1123         SENSOR_ATTR_IN(4),
1124         SENSOR_ATTR_IN(5),
1125         SENSOR_ATTR_IN(6),
1126         SENSOR_ATTR_IN(7),
1127         SENSOR_ATTR_IN(8),
1128         SENSOR_ATTR_IN(9),
1129         SENSOR_ATTR_FAN(1),
1130         SENSOR_ATTR_FAN(2),
1131         SENSOR_ATTR_FAN(3),
1132         SENSOR_ATTR_FAN(4),
1133         SENSOR_ATTR_FAN(5),
1134         SENSOR_ATTR_PWM(1),
1135         SENSOR_ATTR_PWM(2),
1136         SENSOR_ATTR_PWM(3),
1137 };
1138
1139 static struct sensor_device_attribute_2 w83793_temp[] = {
1140         SENSOR_ATTR_TEMP(1),
1141         SENSOR_ATTR_TEMP(2),
1142         SENSOR_ATTR_TEMP(3),
1143         SENSOR_ATTR_TEMP(4),
1144         SENSOR_ATTR_TEMP(5),
1145         SENSOR_ATTR_TEMP(6),
1146 };
1147
1148 /* Fan6-Fan12 */
1149 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1150         SENSOR_ATTR_FAN(6),
1151         SENSOR_ATTR_FAN(7),
1152         SENSOR_ATTR_FAN(8),
1153         SENSOR_ATTR_FAN(9),
1154         SENSOR_ATTR_FAN(10),
1155         SENSOR_ATTR_FAN(11),
1156         SENSOR_ATTR_FAN(12),
1157 };
1158
1159 /* Pwm4-Pwm8 */
1160 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1161         SENSOR_ATTR_PWM(4),
1162         SENSOR_ATTR_PWM(5),
1163         SENSOR_ATTR_PWM(6),
1164         SENSOR_ATTR_PWM(7),
1165         SENSOR_ATTR_PWM(8),
1166 };
1167
1168 static struct sensor_device_attribute_2 w83793_vid[] = {
1169         SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1170         SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1171 };
1172 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
1173
1174 static struct sensor_device_attribute_2 sda_single_files[] = {
1175         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1176                       store_chassis_clear, ALARM_STATUS, 30),
1177         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1178                       store_beep_enable, NOT_USED, NOT_USED),
1179         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1180                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1181         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1182                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1183         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1184                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1185         SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1186                       store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1187 };
1188
1189 static void w83793_init_client(struct i2c_client *client)
1190 {
1191         if (reset)
1192                 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1193
1194         /* Start monitoring */
1195         w83793_write_value(client, W83793_REG_CONFIG,
1196                            w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1197 }
1198
1199 /*
1200  * Watchdog routines
1201  */
1202
1203 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1204 {
1205         unsigned int mtimeout;
1206         int ret;
1207
1208         mtimeout = DIV_ROUND_UP(timeout, 60);
1209
1210         if (mtimeout > 255)
1211                 return -EINVAL;
1212
1213         mutex_lock(&data->watchdog_lock);
1214         if (!data->client) {
1215                 ret = -ENODEV;
1216                 goto leave;
1217         }
1218
1219         data->watchdog_timeout = mtimeout;
1220
1221         /* Set Timeout value (in Minutes) */
1222         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1223                            data->watchdog_timeout);
1224
1225         ret = mtimeout * 60;
1226
1227 leave:
1228         mutex_unlock(&data->watchdog_lock);
1229         return ret;
1230 }
1231
1232 static int watchdog_get_timeout(struct w83793_data *data)
1233 {
1234         int timeout;
1235
1236         mutex_lock(&data->watchdog_lock);
1237         timeout = data->watchdog_timeout * 60;
1238         mutex_unlock(&data->watchdog_lock);
1239
1240         return timeout;
1241 }
1242
1243 static int watchdog_trigger(struct w83793_data *data)
1244 {
1245         int ret = 0;
1246
1247         mutex_lock(&data->watchdog_lock);
1248         if (!data->client) {
1249                 ret = -ENODEV;
1250                 goto leave;
1251         }
1252
1253         /* Set Timeout value (in Minutes) */
1254         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1255                            data->watchdog_timeout);
1256
1257 leave:
1258         mutex_unlock(&data->watchdog_lock);
1259         return ret;
1260 }
1261
1262 static int watchdog_enable(struct w83793_data *data)
1263 {
1264         int ret = 0;
1265
1266         mutex_lock(&data->watchdog_lock);
1267         if (!data->client) {
1268                 ret = -ENODEV;
1269                 goto leave;
1270         }
1271
1272         /* Set initial timeout */
1273         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1274                            data->watchdog_timeout);
1275
1276         /* Enable Soft Watchdog */
1277         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1278
1279 leave:
1280         mutex_unlock(&data->watchdog_lock);
1281         return ret;
1282 }
1283
1284 static int watchdog_disable(struct w83793_data *data)
1285 {
1286         int ret = 0;
1287
1288         mutex_lock(&data->watchdog_lock);
1289         if (!data->client) {
1290                 ret = -ENODEV;
1291                 goto leave;
1292         }
1293
1294         /* Disable Soft Watchdog */
1295         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1296
1297 leave:
1298         mutex_unlock(&data->watchdog_lock);
1299         return ret;
1300 }
1301
1302 static int watchdog_open(struct inode *inode, struct file *filp)
1303 {
1304         struct w83793_data *pos, *data = NULL;
1305         int watchdog_is_open;
1306
1307         /*
1308          * We get called from drivers/char/misc.c with misc_mtx hold, and we
1309          * call misc_register() from  w83793_probe() with watchdog_data_mutex
1310          * hold, as misc_register() takes the misc_mtx lock, this is a possible
1311          * deadlock, so we use mutex_trylock here.
1312          */
1313         if (!mutex_trylock(&watchdog_data_mutex))
1314                 return -ERESTARTSYS;
1315         list_for_each_entry(pos, &watchdog_data_list, list) {
1316                 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1317                         data = pos;
1318                         break;
1319                 }
1320         }
1321
1322         /* Check, if device is already open */
1323         watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1324
1325         /*
1326          * Increase data reference counter (if not already done).
1327          * Note we can never not have found data, so we don't check for this
1328          */
1329         if (!watchdog_is_open)
1330                 kref_get(&data->kref);
1331
1332         mutex_unlock(&watchdog_data_mutex);
1333
1334         /* Check, if device is already open and possibly issue error */
1335         if (watchdog_is_open)
1336                 return -EBUSY;
1337
1338         /* Enable Soft Watchdog */
1339         watchdog_enable(data);
1340
1341         /* Store pointer to data into filp's private data */
1342         filp->private_data = data;
1343
1344         return nonseekable_open(inode, filp);
1345 }
1346
1347 static int watchdog_close(struct inode *inode, struct file *filp)
1348 {
1349         struct w83793_data *data = filp->private_data;
1350
1351         if (data->watchdog_expect_close) {
1352                 watchdog_disable(data);
1353                 data->watchdog_expect_close = 0;
1354         } else {
1355                 watchdog_trigger(data);
1356                 dev_crit(&data->client->dev,
1357                         "unexpected close, not stopping watchdog!\n");
1358         }
1359
1360         clear_bit(0, &data->watchdog_is_open);
1361
1362         /* Decrease data reference counter */
1363         mutex_lock(&watchdog_data_mutex);
1364         kref_put(&data->kref, w83793_release_resources);
1365         mutex_unlock(&watchdog_data_mutex);
1366
1367         return 0;
1368 }
1369
1370 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1371         size_t count, loff_t *offset)
1372 {
1373         ssize_t ret;
1374         struct w83793_data *data = filp->private_data;
1375
1376         if (count) {
1377                 if (!nowayout) {
1378                         size_t i;
1379
1380                         /* Clear it in case it was set with a previous write */
1381                         data->watchdog_expect_close = 0;
1382
1383                         for (i = 0; i != count; i++) {
1384                                 char c;
1385                                 if (get_user(c, buf + i))
1386                                         return -EFAULT;
1387                                 if (c == 'V')
1388                                         data->watchdog_expect_close = 1;
1389                         }
1390                 }
1391                 ret = watchdog_trigger(data);
1392                 if (ret < 0)
1393                         return ret;
1394         }
1395         return count;
1396 }
1397
1398 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1399                            unsigned long arg)
1400 {
1401         struct watchdog_info ident = {
1402                 .options = WDIOF_KEEPALIVEPING |
1403                            WDIOF_SETTIMEOUT |
1404                            WDIOF_CARDRESET,
1405                 .identity = "w83793 watchdog"
1406         };
1407
1408         int val, ret = 0;
1409         struct w83793_data *data = filp->private_data;
1410
1411         switch (cmd) {
1412         case WDIOC_GETSUPPORT:
1413                 if (!nowayout)
1414                         ident.options |= WDIOF_MAGICCLOSE;
1415                 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1416                         ret = -EFAULT;
1417                 break;
1418
1419         case WDIOC_GETSTATUS:
1420                 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1421                 ret = put_user(val, (int __user *)arg);
1422                 break;
1423
1424         case WDIOC_GETBOOTSTATUS:
1425                 ret = put_user(0, (int __user *)arg);
1426                 break;
1427
1428         case WDIOC_KEEPALIVE:
1429                 ret = watchdog_trigger(data);
1430                 break;
1431
1432         case WDIOC_GETTIMEOUT:
1433                 val = watchdog_get_timeout(data);
1434                 ret = put_user(val, (int __user *)arg);
1435                 break;
1436
1437         case WDIOC_SETTIMEOUT:
1438                 if (get_user(val, (int __user *)arg)) {
1439                         ret = -EFAULT;
1440                         break;
1441                 }
1442                 ret = watchdog_set_timeout(data, val);
1443                 if (ret > 0)
1444                         ret = put_user(ret, (int __user *)arg);
1445                 break;
1446
1447         case WDIOC_SETOPTIONS:
1448                 if (get_user(val, (int __user *)arg)) {
1449                         ret = -EFAULT;
1450                         break;
1451                 }
1452
1453                 if (val & WDIOS_DISABLECARD)
1454                         ret = watchdog_disable(data);
1455                 else if (val & WDIOS_ENABLECARD)
1456                         ret = watchdog_enable(data);
1457                 else
1458                         ret = -EINVAL;
1459
1460                 break;
1461         default:
1462                 ret = -ENOTTY;
1463         }
1464         return ret;
1465 }
1466
1467 static const struct file_operations watchdog_fops = {
1468         .owner = THIS_MODULE,
1469         .llseek = no_llseek,
1470         .open = watchdog_open,
1471         .release = watchdog_close,
1472         .write = watchdog_write,
1473         .unlocked_ioctl = watchdog_ioctl,
1474 };
1475
1476 /*
1477  *      Notifier for system down
1478  */
1479
1480 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1481                                void *unused)
1482 {
1483         struct w83793_data *data = NULL;
1484
1485         if (code == SYS_DOWN || code == SYS_HALT) {
1486
1487                 /* Disable each registered watchdog */
1488                 mutex_lock(&watchdog_data_mutex);
1489                 list_for_each_entry(data, &watchdog_data_list, list) {
1490                         if (data->watchdog_miscdev.minor)
1491                                 watchdog_disable(data);
1492                 }
1493                 mutex_unlock(&watchdog_data_mutex);
1494         }
1495
1496         return NOTIFY_DONE;
1497 }
1498
1499 /*
1500  *      The WDT needs to learn about soft shutdowns in order to
1501  *      turn the timebomb registers off.
1502  */
1503
1504 static struct notifier_block watchdog_notifier = {
1505         .notifier_call = watchdog_notify_sys,
1506 };
1507
1508 /*
1509  * Init / remove routines
1510  */
1511
1512 static int w83793_remove(struct i2c_client *client)
1513 {
1514         struct w83793_data *data = i2c_get_clientdata(client);
1515         struct device *dev = &client->dev;
1516         int i, tmp;
1517
1518         /* Unregister the watchdog (if registered) */
1519         if (data->watchdog_miscdev.minor) {
1520                 misc_deregister(&data->watchdog_miscdev);
1521
1522                 if (data->watchdog_is_open) {
1523                         dev_warn(&client->dev,
1524                                 "i2c client detached with watchdog open! "
1525                                 "Stopping watchdog.\n");
1526                         watchdog_disable(data);
1527                 }
1528
1529                 mutex_lock(&watchdog_data_mutex);
1530                 list_del(&data->list);
1531                 mutex_unlock(&watchdog_data_mutex);
1532
1533                 /* Tell the watchdog code the client is gone */
1534                 mutex_lock(&data->watchdog_lock);
1535                 data->client = NULL;
1536                 mutex_unlock(&data->watchdog_lock);
1537         }
1538
1539         /* Reset Configuration Register to Disable Watch Dog Registers */
1540         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1541         w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1542
1543         unregister_reboot_notifier(&watchdog_notifier);
1544
1545         hwmon_device_unregister(data->hwmon_dev);
1546
1547         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1548                 device_remove_file(dev,
1549                                    &w83793_sensor_attr_2[i].dev_attr);
1550
1551         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1552                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1553
1554         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1555                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1556         device_remove_file(dev, &dev_attr_vrm);
1557
1558         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1559                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1560
1561         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1562                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1563
1564         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1565                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1566
1567         if (data->lm75[0] != NULL)
1568                 i2c_unregister_device(data->lm75[0]);
1569         if (data->lm75[1] != NULL)
1570                 i2c_unregister_device(data->lm75[1]);
1571
1572         /* Decrease data reference counter */
1573         mutex_lock(&watchdog_data_mutex);
1574         kref_put(&data->kref, w83793_release_resources);
1575         mutex_unlock(&watchdog_data_mutex);
1576
1577         return 0;
1578 }
1579
1580 static int
1581 w83793_detect_subclients(struct i2c_client *client)
1582 {
1583         int i, id, err;
1584         int address = client->addr;
1585         u8 tmp;
1586         struct i2c_adapter *adapter = client->adapter;
1587         struct w83793_data *data = i2c_get_clientdata(client);
1588
1589         id = i2c_adapter_id(adapter);
1590         if (force_subclients[0] == id && force_subclients[1] == address) {
1591                 for (i = 2; i <= 3; i++) {
1592                         if (force_subclients[i] < 0x48
1593                             || force_subclients[i] > 0x4f) {
1594                                 dev_err(&client->dev,
1595                                         "invalid subclient "
1596                                         "address %d; must be 0x48-0x4f\n",
1597                                         force_subclients[i]);
1598                                 err = -EINVAL;
1599                                 goto ERROR_SC_0;
1600                         }
1601                 }
1602                 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1603                                    (force_subclients[2] & 0x07) |
1604                                    ((force_subclients[3] & 0x07) << 4));
1605         }
1606
1607         tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1608         if (!(tmp & 0x08))
1609                 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1610         if (!(tmp & 0x80)) {
1611                 if ((data->lm75[0] != NULL)
1612                     && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1613                         dev_err(&client->dev,
1614                                 "duplicate addresses 0x%x, "
1615                                 "use force_subclients\n", data->lm75[0]->addr);
1616                         err = -ENODEV;
1617                         goto ERROR_SC_1;
1618                 }
1619                 data->lm75[1] = i2c_new_dummy(adapter,
1620                                               0x48 + ((tmp >> 4) & 0x7));
1621         }
1622
1623         return 0;
1624
1625         /* Undo inits in case of errors */
1626
1627 ERROR_SC_1:
1628         if (data->lm75[0] != NULL)
1629                 i2c_unregister_device(data->lm75[0]);
1630 ERROR_SC_0:
1631         return err;
1632 }
1633
1634 /* Return 0 if detection is successful, -ENODEV otherwise */
1635 static int w83793_detect(struct i2c_client *client,
1636                          struct i2c_board_info *info)
1637 {
1638         u8 tmp, bank, chip_id;
1639         struct i2c_adapter *adapter = client->adapter;
1640         unsigned short address = client->addr;
1641
1642         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1643                 return -ENODEV;
1644
1645         bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1646
1647         tmp = bank & 0x80 ? 0x5c : 0xa3;
1648         /* Check Winbond vendor ID */
1649         if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1650                 pr_debug("w83793: Detection failed at check vendor id\n");
1651                 return -ENODEV;
1652         }
1653
1654         /*
1655          * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1656          * should match
1657          */
1658         if ((bank & 0x07) == 0
1659          && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1660             (address << 1)) {
1661                 pr_debug("w83793: Detection failed at check i2c addr\n");
1662                 return -ENODEV;
1663         }
1664
1665         /* Determine the chip type now */
1666         chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1667         if (chip_id != 0x7b)
1668                 return -ENODEV;
1669
1670         strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1671
1672         return 0;
1673 }
1674
1675 static int w83793_probe(struct i2c_client *client,
1676                         const struct i2c_device_id *id)
1677 {
1678         struct device *dev = &client->dev;
1679         const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1680         struct w83793_data *data;
1681         int i, tmp, val, err;
1682         int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1683         int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1684         int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1685
1686         data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1687         if (!data) {
1688                 err = -ENOMEM;
1689                 goto exit;
1690         }
1691
1692         i2c_set_clientdata(client, data);
1693         data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1694         mutex_init(&data->update_lock);
1695         mutex_init(&data->watchdog_lock);
1696         INIT_LIST_HEAD(&data->list);
1697         kref_init(&data->kref);
1698
1699         /*
1700          * Store client pointer in our data struct for watchdog usage
1701          * (where the client is found through a data ptr instead of the
1702          * otherway around)
1703          */
1704         data->client = client;
1705
1706         err = w83793_detect_subclients(client);
1707         if (err)
1708                 goto free_mem;
1709
1710         /* Initialize the chip */
1711         w83793_init_client(client);
1712
1713         /*
1714          * Only fan 1-5 has their own input pins,
1715          * Pwm 1-3 has their own pins
1716          */
1717         data->has_fan = 0x1f;
1718         data->has_pwm = 0x07;
1719         tmp = w83793_read_value(client, W83793_REG_MFC);
1720         val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1721
1722         /* check the function of pins 49-56 */
1723         if (tmp & 0x80) {
1724                 data->has_vid |= 0x2;   /* has VIDB */
1725         } else {
1726                 data->has_pwm |= 0x18;  /* pwm 4,5 */
1727                 if (val & 0x01) {       /* fan 6 */
1728                         data->has_fan |= 0x20;
1729                         data->has_pwm |= 0x20;
1730                 }
1731                 if (val & 0x02) {       /* fan 7 */
1732                         data->has_fan |= 0x40;
1733                         data->has_pwm |= 0x40;
1734                 }
1735                 if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1736                         data->has_fan |= 0x80;
1737                         data->has_pwm |= 0x80;
1738                 }
1739         }
1740
1741         /* check the function of pins 37-40 */
1742         if (!(tmp & 0x29))
1743                 data->has_vid |= 0x1;   /* has VIDA */
1744         if (0x08 == (tmp & 0x0c)) {
1745                 if (val & 0x08) /* fan 9 */
1746                         data->has_fan |= 0x100;
1747                 if (val & 0x10) /* fan 10 */
1748                         data->has_fan |= 0x200;
1749         }
1750         if (0x20 == (tmp & 0x30)) {
1751                 if (val & 0x20) /* fan 11 */
1752                         data->has_fan |= 0x400;
1753                 if (val & 0x40) /* fan 12 */
1754                         data->has_fan |= 0x800;
1755         }
1756
1757         if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1758                 data->has_fan |= 0x80;
1759                 data->has_pwm |= 0x80;
1760         }
1761
1762         tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1763         if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1764                 data->has_fan |= 0x100;
1765         }
1766         if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1767                 data->has_fan |= 0x200;
1768         }
1769         if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1770                 data->has_fan |= 0x400;
1771         }
1772         if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1773                 data->has_fan |= 0x800;
1774         }
1775
1776         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1777         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1778         if (tmp & 0x01)
1779                 data->has_temp |= 0x01;
1780         if (tmp & 0x04)
1781                 data->has_temp |= 0x02;
1782         if (tmp & 0x10)
1783                 data->has_temp |= 0x04;
1784         if (tmp & 0x40)
1785                 data->has_temp |= 0x08;
1786
1787         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1788         if (tmp & 0x01)
1789                 data->has_temp |= 0x10;
1790         if (tmp & 0x02)
1791                 data->has_temp |= 0x20;
1792
1793         /* Register sysfs hooks */
1794         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1795                 err = device_create_file(dev,
1796                                          &w83793_sensor_attr_2[i].dev_attr);
1797                 if (err)
1798                         goto exit_remove;
1799         }
1800
1801         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1802                 if (!(data->has_vid & (1 << i)))
1803                         continue;
1804                 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1805                 if (err)
1806                         goto exit_remove;
1807         }
1808         if (data->has_vid) {
1809                 data->vrm = vid_which_vrm();
1810                 err = device_create_file(dev, &dev_attr_vrm);
1811                 if (err)
1812                         goto exit_remove;
1813         }
1814
1815         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1816                 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1817                 if (err)
1818                         goto exit_remove;
1819
1820         }
1821
1822         for (i = 0; i < 6; i++) {
1823                 int j;
1824                 if (!(data->has_temp & (1 << i)))
1825                         continue;
1826                 for (j = 0; j < files_temp; j++) {
1827                         err = device_create_file(dev,
1828                                                 &w83793_temp[(i) * files_temp
1829                                                                 + j].dev_attr);
1830                         if (err)
1831                                 goto exit_remove;
1832                 }
1833         }
1834
1835         for (i = 5; i < 12; i++) {
1836                 int j;
1837                 if (!(data->has_fan & (1 << i)))
1838                         continue;
1839                 for (j = 0; j < files_fan; j++) {
1840                         err = device_create_file(dev,
1841                                            &w83793_left_fan[(i - 5) * files_fan
1842                                                                 + j].dev_attr);
1843                         if (err)
1844                                 goto exit_remove;
1845                 }
1846         }
1847
1848         for (i = 3; i < 8; i++) {
1849                 int j;
1850                 if (!(data->has_pwm & (1 << i)))
1851                         continue;
1852                 for (j = 0; j < files_pwm; j++) {
1853                         err = device_create_file(dev,
1854                                            &w83793_left_pwm[(i - 3) * files_pwm
1855                                                                 + j].dev_attr);
1856                         if (err)
1857                                 goto exit_remove;
1858                 }
1859         }
1860
1861         data->hwmon_dev = hwmon_device_register(dev);
1862         if (IS_ERR(data->hwmon_dev)) {
1863                 err = PTR_ERR(data->hwmon_dev);
1864                 goto exit_remove;
1865         }
1866
1867         /* Watchdog initialization */
1868
1869         /* Register boot notifier */
1870         err = register_reboot_notifier(&watchdog_notifier);
1871         if (err != 0) {
1872                 dev_err(&client->dev,
1873                         "cannot register reboot notifier (err=%d)\n", err);
1874                 goto exit_devunreg;
1875         }
1876
1877         /*
1878          * Enable Watchdog registers.
1879          * Set Configuration Register to Enable Watch Dog Registers
1880          * (Bit 2) = XXXX, X1XX.
1881          */
1882         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1883         w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1884
1885         /* Set the default watchdog timeout */
1886         data->watchdog_timeout = timeout;
1887
1888         /* Check, if last reboot was caused by watchdog */
1889         data->watchdog_caused_reboot =
1890           w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1891
1892         /* Disable Soft Watchdog during initialiation */
1893         watchdog_disable(data);
1894
1895         /*
1896          * We take the data_mutex lock early so that watchdog_open() cannot
1897          * run when misc_register() has completed, but we've not yet added
1898          * our data to the watchdog_data_list (and set the default timeout)
1899          */
1900         mutex_lock(&watchdog_data_mutex);
1901         for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1902                 /* Register our watchdog part */
1903                 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1904                         "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1905                 data->watchdog_miscdev.name = data->watchdog_name;
1906                 data->watchdog_miscdev.fops = &watchdog_fops;
1907                 data->watchdog_miscdev.minor = watchdog_minors[i];
1908
1909                 err = misc_register(&data->watchdog_miscdev);
1910                 if (err == -EBUSY)
1911                         continue;
1912                 if (err) {
1913                         data->watchdog_miscdev.minor = 0;
1914                         dev_err(&client->dev,
1915                                 "Registering watchdog chardev: %d\n", err);
1916                         break;
1917                 }
1918
1919                 list_add(&data->list, &watchdog_data_list);
1920
1921                 dev_info(&client->dev,
1922                         "Registered watchdog chardev major 10, minor: %d\n",
1923                         watchdog_minors[i]);
1924                 break;
1925         }
1926         if (i == ARRAY_SIZE(watchdog_minors)) {
1927                 data->watchdog_miscdev.minor = 0;
1928                 dev_warn(&client->dev,
1929                          "Couldn't register watchdog chardev (due to no free minor)\n");
1930         }
1931
1932         mutex_unlock(&watchdog_data_mutex);
1933
1934         return 0;
1935
1936         /* Unregister hwmon device */
1937
1938 exit_devunreg:
1939
1940         hwmon_device_unregister(data->hwmon_dev);
1941
1942         /* Unregister sysfs hooks */
1943
1944 exit_remove:
1945         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1946                 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1947
1948         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1949                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1950
1951         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1952                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1953
1954         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1955                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1956
1957         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1958                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1959
1960         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1961                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1962
1963         if (data->lm75[0] != NULL)
1964                 i2c_unregister_device(data->lm75[0]);
1965         if (data->lm75[1] != NULL)
1966                 i2c_unregister_device(data->lm75[1]);
1967 free_mem:
1968         kfree(data);
1969 exit:
1970         return err;
1971 }
1972
1973 static void w83793_update_nonvolatile(struct device *dev)
1974 {
1975         struct i2c_client *client = to_i2c_client(dev);
1976         struct w83793_data *data = i2c_get_clientdata(client);
1977         int i, j;
1978         /*
1979          * They are somewhat "stable" registers, and to update them every time
1980          * takes so much time, it's just not worthy. Update them in a long
1981          * interval to avoid exception.
1982          */
1983         if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1984               || !data->valid))
1985                 return;
1986         /* update voltage limits */
1987         for (i = 1; i < 3; i++) {
1988                 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1989                         data->in[j][i] =
1990                             w83793_read_value(client, W83793_REG_IN[j][i]);
1991                 }
1992                 data->in_low_bits[i] =
1993                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1994         }
1995
1996         for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1997                 /* Update the Fan measured value and limits */
1998                 if (!(data->has_fan & (1 << i)))
1999                         continue;
2000                 data->fan_min[i] =
2001                     w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
2002                 data->fan_min[i] |=
2003                     w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
2004         }
2005
2006         for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
2007                 if (!(data->has_temp & (1 << i)))
2008                         continue;
2009                 data->temp_fan_map[i] =
2010                     w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
2011                 for (j = 1; j < 5; j++) {
2012                         data->temp[i][j] =
2013                             w83793_read_value(client, W83793_REG_TEMP[i][j]);
2014                 }
2015                 data->temp_cruise[i] =
2016                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2017                 for (j = 0; j < 7; j++) {
2018                         data->sf2_pwm[i][j] =
2019                             w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2020                         data->sf2_temp[i][j] =
2021                             w83793_read_value(client,
2022                                               W83793_REG_SF2_TEMP(i, j));
2023                 }
2024         }
2025
2026         for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2027                 data->temp_mode[i] =
2028                     w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2029
2030         for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2031                 data->tolerance[i] =
2032                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2033         }
2034
2035         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2036                 if (!(data->has_pwm & (1 << i)))
2037                         continue;
2038                 data->pwm[i][PWM_NONSTOP] =
2039                     w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2040                 data->pwm[i][PWM_START] =
2041                     w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2042                 data->pwm_stop_time[i] =
2043                     w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2044         }
2045
2046         data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2047         data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2048         data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2049         data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2050         data->temp_critical =
2051             w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2052         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2053
2054         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2055                 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2056
2057         data->last_nonvolatile = jiffies;
2058 }
2059
2060 static struct w83793_data *w83793_update_device(struct device *dev)
2061 {
2062         struct i2c_client *client = to_i2c_client(dev);
2063         struct w83793_data *data = i2c_get_clientdata(client);
2064         int i;
2065
2066         mutex_lock(&data->update_lock);
2067
2068         if (!(time_after(jiffies, data->last_updated + HZ * 2)
2069               || !data->valid))
2070                 goto END;
2071
2072         /* Update the voltages measured value and limits */
2073         for (i = 0; i < ARRAY_SIZE(data->in); i++)
2074                 data->in[i][IN_READ] =
2075                     w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2076
2077         data->in_low_bits[IN_READ] =
2078             w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2079
2080         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2081                 if (!(data->has_fan & (1 << i)))
2082                         continue;
2083                 data->fan[i] =
2084                     w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2085                 data->fan[i] |=
2086                     w83793_read_value(client, W83793_REG_FAN(i) + 1);
2087         }
2088
2089         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2090                 if (!(data->has_temp & (1 << i)))
2091                         continue;
2092                 data->temp[i][TEMP_READ] =
2093                     w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2094         }
2095
2096         data->temp_low_bits =
2097             w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2098
2099         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2100                 if (data->has_pwm & (1 << i))
2101                         data->pwm[i][PWM_DUTY] =
2102                             w83793_read_value(client,
2103                                               W83793_REG_PWM(i, PWM_DUTY));
2104         }
2105
2106         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2107                 data->alarms[i] =
2108                     w83793_read_value(client, W83793_REG_ALARM(i));
2109         if (data->has_vid & 0x01)
2110                 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2111         if (data->has_vid & 0x02)
2112                 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2113         w83793_update_nonvolatile(dev);
2114         data->last_updated = jiffies;
2115         data->valid = 1;
2116
2117 END:
2118         mutex_unlock(&data->update_lock);
2119         return data;
2120 }
2121
2122 /*
2123  * Ignore the possibility that somebody change bank outside the driver
2124  * Must be called with data->update_lock held, except during initialization
2125  */
2126 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2127 {
2128         struct w83793_data *data = i2c_get_clientdata(client);
2129         u8 res = 0xff;
2130         u8 new_bank = reg >> 8;
2131
2132         new_bank |= data->bank & 0xfc;
2133         if (data->bank != new_bank) {
2134                 if (i2c_smbus_write_byte_data
2135                     (client, W83793_REG_BANKSEL, new_bank) >= 0)
2136                         data->bank = new_bank;
2137                 else {
2138                         dev_err(&client->dev,
2139                                 "set bank to %d failed, fall back "
2140                                 "to bank %d, read reg 0x%x error\n",
2141                                 new_bank, data->bank, reg);
2142                         res = 0x0;      /* read 0x0 from the chip */
2143                         goto END;
2144                 }
2145         }
2146         res = i2c_smbus_read_byte_data(client, reg & 0xff);
2147 END:
2148         return res;
2149 }
2150
2151 /* Must be called with data->update_lock held, except during initialization */
2152 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2153 {
2154         struct w83793_data *data = i2c_get_clientdata(client);
2155         int res;
2156         u8 new_bank = reg >> 8;
2157
2158         new_bank |= data->bank & 0xfc;
2159         if (data->bank != new_bank) {
2160                 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2161                                                 new_bank);
2162                 if (res < 0) {
2163                         dev_err(&client->dev,
2164                                 "set bank to %d failed, fall back "
2165                                 "to bank %d, write reg 0x%x error\n",
2166                                 new_bank, data->bank, reg);
2167                         goto END;
2168                 }
2169                 data->bank = new_bank;
2170         }
2171
2172         res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2173 END:
2174         return res;
2175 }
2176
2177 module_i2c_driver(w83793_driver);
2178
2179 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2180 MODULE_DESCRIPTION("w83793 driver");
2181 MODULE_LICENSE("GPL");