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