drivers/hwmon/w83793.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * w83793.c - Linux kernel driver for hardware monitoring
   4  * Copyright (C) 2006 Winbond Electronics Corp.
   5  *            Yuan Mu
   6  *            Rudolf Marek <r.marek@assembler.cz>
   7  * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
   8  *              Watchdog driver part
   9  *              (Based partially on fschmd driver,
  10  *               Copyright 2007-2008 by Hans de Goede)
  11  */
  12
  13 /*
  14  * Supports following chips:
  15  *
  16  * Chip #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  17  * w83793       10      12      8       6       0x7b    0x5ca3  yes     no
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/slab.h>
  23 #include <linux/i2c.h>
  24 #include <linux/hwmon.h>
  25 #include <linux/hwmon-vid.h>
  26 #include <linux/hwmon-sysfs.h>
  27 #include <linux/err.h>
  28 #include <linux/mutex.h>
  29 #include <linux/fs.h>
  30 #include <linux/watchdog.h>
  31 #include <linux/miscdevice.h>
  32 #include <linux/uaccess.h>
  33 #include <linux/kref.h>
  34 #include <linux/notifier.h>
  35 #include <linux/reboot.h>
  36 #include <linux/jiffies.h>
  37
  38 /* Default values */
  39 #define WATCHDOG_TIMEOUT 2      /* 2 minute default timeout */
  40
  41 /* Addresses to scan */
  42 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
  43                                                 I2C_CLIENT_END };
  44
  45 /* Insmod parameters */
  46
  47 static unsigned short force_subclients[4];
  48 module_param_array(force_subclients, short, NULL, 0);
  49 MODULE_PARM_DESC(force_subclients,
  50                  "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
  51
  52 static bool reset;
  53 module_param(reset, bool, 0);
  54 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  55
  56 static int timeout = WATCHDOG_TIMEOUT;  /* default timeout in minutes */
  57 module_param(timeout, int, 0);
  58 MODULE_PARM_DESC(timeout,
  59         "Watchdog timeout in minutes. 2<= timeout <=255 (default="
  60                                 __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
  61
  62 static bool nowayout = WATCHDOG_NOWAYOUT;
  63 module_param(nowayout, bool, 0);
  64 MODULE_PARM_DESC(nowayout,
  65         "Watchdog cannot be stopped once started (default="
  66                                 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
  67
  68 /*
  69  * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
  70  * as ID, Bank Select registers
  71  */
  72 #define W83793_REG_BANKSEL              0x00
  73 #define W83793_REG_VENDORID             0x0d
  74 #define W83793_REG_CHIPID               0x0e
  75 #define W83793_REG_DEVICEID             0x0f
  76
  77 #define W83793_REG_CONFIG               0x40
  78 #define W83793_REG_MFC                  0x58
  79 #define W83793_REG_FANIN_CTRL           0x5c
  80 #define W83793_REG_FANIN_SEL            0x5d
  81 #define W83793_REG_I2C_ADDR             0x0b
  82 #define W83793_REG_I2C_SUBADDR          0x0c
  83 #define W83793_REG_VID_INA              0x05
  84 #define W83793_REG_VID_INB              0x06
  85 #define W83793_REG_VID_LATCHA           0x07
  86 #define W83793_REG_VID_LATCHB           0x08
  87 #define W83793_REG_VID_CTRL             0x59
  88
  89 #define W83793_REG_WDT_LOCK             0x01
  90 #define W83793_REG_WDT_ENABLE           0x02
  91 #define W83793_REG_WDT_STATUS           0x03
  92 #define W83793_REG_WDT_TIMEOUT          0x04
  93
  94 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
  95
  96 #define TEMP_READ       0
  97 #define TEMP_CRIT       1
  98 #define TEMP_CRIT_HYST  2
  99 #define TEMP_WARN       3
 100 #define TEMP_WARN_HYST  4
 101 /*
 102  * only crit and crit_hyst affect real-time alarm status
 103  * current crit crit_hyst warn warn_hyst
 104  */
 105 static u16 W83793_REG_TEMP[][5] = {
 106         {0x1c, 0x78, 0x79, 0x7a, 0x7b},
 107         {0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
 108         {0x1e, 0x80, 0x81, 0x82, 0x83},
 109         {0x1f, 0x84, 0x85, 0x86, 0x87},
 110         {0x20, 0x88, 0x89, 0x8a, 0x8b},
 111         {0x21, 0x8c, 0x8d, 0x8e, 0x8f},
 112 };
 113
 114 #define W83793_REG_TEMP_LOW_BITS        0x22
 115
 116 #define W83793_REG_BEEP(index)          (0x53 + (index))
 117 #define W83793_REG_ALARM(index)         (0x4b + (index))
 118
 119 #define W83793_REG_CLR_CHASSIS          0x4a    /* SMI MASK4 */
 120 #define W83793_REG_IRQ_CTRL             0x50
 121 #define W83793_REG_OVT_CTRL             0x51
 122 #define W83793_REG_OVT_BEEP             0x52
 123
 124 #define IN_READ                         0
 125 #define IN_MAX                          1
 126 #define IN_LOW                          2
 127 static const u16 W83793_REG_IN[][3] = {
 128         /* Current, High, Low */
 129         {0x10, 0x60, 0x61},     /* Vcore A      */
 130         {0x11, 0x62, 0x63},     /* Vcore B      */
 131         {0x12, 0x64, 0x65},     /* Vtt          */
 132         {0x14, 0x6a, 0x6b},     /* VSEN1        */
 133         {0x15, 0x6c, 0x6d},     /* VSEN2        */
 134         {0x16, 0x6e, 0x6f},     /* +3VSEN       */
 135         {0x17, 0x70, 0x71},     /* +12VSEN      */
 136         {0x18, 0x72, 0x73},     /* 5VDD         */
 137         {0x19, 0x74, 0x75},     /* 5VSB         */
 138         {0x1a, 0x76, 0x77},     /* VBAT         */
 139 };
 140
 141 /* Low Bits of Vcore A/B Vtt Read/High/Low */
 142 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
 143 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
 144 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
 145
 146 #define W83793_REG_FAN(index)           (0x23 + 2 * (index))    /* High byte */
 147 #define W83793_REG_FAN_MIN(index)       (0x90 + 2 * (index))    /* High byte */
 148
 149 #define W83793_REG_PWM_DEFAULT          0xb2
 150 #define W83793_REG_PWM_ENABLE           0x207
 151 #define W83793_REG_PWM_UPTIME           0xc3    /* Unit in 0.1 second */
 152 #define W83793_REG_PWM_DOWNTIME         0xc4    /* Unit in 0.1 second */
 153 #define W83793_REG_TEMP_CRITICAL        0xc5
 154
 155 #define PWM_DUTY                        0
 156 #define PWM_START                       1
 157 #define PWM_NONSTOP                     2
 158 #define PWM_STOP_TIME                   3
 159 #define W83793_REG_PWM(index, nr)       (((nr) == 0 ? 0xb3 : \
 160                                          (nr) == 1 ? 0x220 : 0x218) + (index))
 161
 162 /* bit field, fan1 is bit0, fan2 is bit1 ... */
 163 #define W83793_REG_TEMP_FAN_MAP(index)  (0x201 + (index))
 164 #define W83793_REG_TEMP_TOL(index)      (0x208 + (index))
 165 #define W83793_REG_TEMP_CRUISE(index)   (0x210 + (index))
 166 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
 167 #define W83793_REG_SF2_TEMP(index, nr)  (0x230 + ((index) << 4) + (nr))
 168 #define W83793_REG_SF2_PWM(index, nr)   (0x238 + ((index) << 4) + (nr))
 169
 170 static inline unsigned long FAN_FROM_REG(u16 val)
 171 {
 172         if ((val >= 0xfff) || (val == 0))
 173                 return  0;
 174         return 1350000UL / val;
 175 }
 176
 177 static inline u16 FAN_TO_REG(long rpm)
 178 {
 179         if (rpm <= 0)
 180                 return 0x0fff;
 181         return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 182 }
 183
 184 static inline unsigned long TIME_FROM_REG(u8 reg)
 185 {
 186         return reg * 100;
 187 }
 188
 189 static inline u8 TIME_TO_REG(unsigned long val)
 190 {
 191         return clamp_val((val + 50) / 100, 0, 0xff);
 192 }
 193
 194 static inline long TEMP_FROM_REG(s8 reg)
 195 {
 196         return reg * 1000;
 197 }
 198
 199 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
 200 {
 201         return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max);
 202 }
 203
 204 struct w83793_data {
 205         struct i2c_client *lm75[2];
 206         struct device *hwmon_dev;
 207         struct mutex update_lock;
 208         char valid;                     /* !=0 if following fields are valid */
 209         unsigned long last_updated;     /* In jiffies */
 210         unsigned long last_nonvolatile; /* In jiffies, last time we update the
 211                                          * nonvolatile registers
 212                                          */
 213
 214         u8 bank;
 215         u8 vrm;
 216         u8 vid[2];
 217         u8 in[10][3];           /* Register value, read/high/low */
 218         u8 in_low_bits[3];      /* Additional resolution for VCore A/B Vtt */
 219
 220         u16 has_fan;            /* Only fan1- fan5 has own pins */
 221         u16 fan[12];            /* Register value combine */
 222         u16 fan_min[12];        /* Register value combine */
 223
 224         s8 temp[6][5];          /* current, crit, crit_hyst,warn, warn_hyst */
 225         u8 temp_low_bits;       /* Additional resolution TD1-TD4 */
 226         u8 temp_mode[2];        /* byte 0: Temp D1-D4 mode each has 2 bits
 227                                  * byte 1: Temp R1,R2 mode, each has 1 bit
 228                                  */
 229         u8 temp_critical;       /* If reached all fan will be at full speed */
 230         u8 temp_fan_map[6];     /* Temp controls which pwm fan, bit field */
 231
 232         u8 has_pwm;
 233         u8 has_temp;
 234         u8 has_vid;
 235         u8 pwm_enable;          /* Register value, each Temp has 1 bit */
 236         u8 pwm_uptime;          /* Register value */
 237         u8 pwm_downtime;        /* Register value */
 238         u8 pwm_default;         /* All fan default pwm, next poweron valid */
 239         u8 pwm[8][3];           /* Register value */
 240         u8 pwm_stop_time[8];
 241         u8 temp_cruise[6];
 242
 243         u8 alarms[5];           /* realtime status registers */
 244         u8 beeps[5];
 245         u8 beep_enable;
 246         u8 tolerance[3];        /* Temp tolerance(Smart Fan I/II) */
 247         u8 sf2_pwm[6][7];       /* Smart FanII: Fan duty cycle */
 248         u8 sf2_temp[6][7];      /* Smart FanII: Temp level point */
 249
 250         /* watchdog */
 251         struct i2c_client *client;
 252         struct mutex watchdog_lock;
 253         struct list_head list; /* member of the watchdog_data_list */
 254         struct kref kref;
 255         struct miscdevice watchdog_miscdev;
 256         unsigned long watchdog_is_open;
 257         char watchdog_expect_close;
 258         char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
 259         unsigned int watchdog_caused_reboot;
 260         int watchdog_timeout; /* watchdog timeout in minutes */
 261 };
 262
 263 /*
 264  * Somewhat ugly :( global data pointer list with all devices, so that
 265  * we can find our device data as when using misc_register. There is no
 266  * other method to get to one's device data from the open file-op and
 267  * for usage in the reboot notifier callback.
 268  */
 269 static LIST_HEAD(watchdog_data_list);
 270
 271 /* Note this lock not only protect list access, but also data.kref access */
 272 static DEFINE_MUTEX(watchdog_data_mutex);
 273
 274 /*
 275  * Release our data struct when we're detached from the i2c client *and* all
 276  * references to our watchdog device are released
 277  */
 278 static void w83793_release_resources(struct kref *ref)
 279 {
 280         struct w83793_data *data = container_of(ref, struct w83793_data, kref);
 281         kfree(data);
 282 }
 283
 284 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
 285 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
 286 static int w83793_probe(struct i2c_client *client,
 287                         const struct i2c_device_id *id);
 288 static int w83793_detect(struct i2c_client *client,
 289                          struct i2c_board_info *info);
 290 static int w83793_remove(struct i2c_client *client);
 291 static void w83793_init_client(struct i2c_client *client);
 292 static void w83793_update_nonvolatile(struct device *dev);
 293 static struct w83793_data *w83793_update_device(struct device *dev);
 294
 295 static const struct i2c_device_id w83793_id[] = {
 296         { "w83793", 0 },
 297         { }
 298 };
 299 MODULE_DEVICE_TABLE(i2c, w83793_id);
 300
 301 static struct i2c_driver w83793_driver = {
 302         .class          = I2C_CLASS_HWMON,
 303         .driver = {
 304                    .name = "w83793",
 305         },
 306         .probe          = w83793_probe,
 307         .remove         = w83793_remove,
 308         .id_table       = w83793_id,
 309         .detect         = w83793_detect,
 310         .address_list   = normal_i2c,
 311 };
 312
 313 static ssize_t
 314 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 315 {
 316         struct w83793_data *data = dev_get_drvdata(dev);
 317         return sprintf(buf, "%d\n", data->vrm);
 318 }
 319
 320 static ssize_t
 321 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 322 {
 323         struct w83793_data *data = w83793_update_device(dev);
 324         struct sensor_device_attribute_2 *sensor_attr =
 325             to_sensor_dev_attr_2(attr);
 326         int index = sensor_attr->index;
 327
 328         return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
 329 }
 330
 331 static ssize_t
 332 vrm_store(struct device *dev, struct device_attribute *attr,
 333           const char *buf, size_t count)
 334 {
 335         struct w83793_data *data = dev_get_drvdata(dev);
 336         unsigned long val;
 337         int err;
 338
 339         err = kstrtoul(buf, 10, &val);
 340         if (err)
 341                 return err;
 342
 343         if (val > 255)
 344                 return -EINVAL;
 345
 346         data->vrm = val;
 347         return count;
 348 }
 349
 350 #define ALARM_STATUS                    0
 351 #define BEEP_ENABLE                     1
 352 static ssize_t
 353 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 354 {
 355         struct w83793_data *data = w83793_update_device(dev);
 356         struct sensor_device_attribute_2 *sensor_attr =
 357             to_sensor_dev_attr_2(attr);
 358         int nr = sensor_attr->nr;
 359         int index = sensor_attr->index >> 3;
 360         int bit = sensor_attr->index & 0x07;
 361         u8 val;
 362
 363         if (nr == ALARM_STATUS) {
 364                 val = (data->alarms[index] >> (bit)) & 1;
 365         } else {                /* BEEP_ENABLE */
 366                 val = (data->beeps[index] >> (bit)) & 1;
 367         }
 368
 369         return sprintf(buf, "%u\n", val);
 370 }
 371
 372 static ssize_t
 373 store_beep(struct device *dev, struct device_attribute *attr,
 374            const char *buf, size_t count)
 375 {
 376         struct i2c_client *client = to_i2c_client(dev);
 377         struct w83793_data *data = i2c_get_clientdata(client);
 378         struct sensor_device_attribute_2 *sensor_attr =
 379             to_sensor_dev_attr_2(attr);
 380         int index = sensor_attr->index >> 3;
 381         int shift = sensor_attr->index & 0x07;
 382         u8 beep_bit = 1 << shift;
 383         unsigned long val;
 384         int err;
 385
 386         err = kstrtoul(buf, 10, &val);
 387         if (err)
 388                 return err;
 389
 390         if (val > 1)
 391                 return -EINVAL;
 392
 393         mutex_lock(&data->update_lock);
 394         data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
 395         data->beeps[index] &= ~beep_bit;
 396         data->beeps[index] |= val << shift;
 397         w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
 398         mutex_unlock(&data->update_lock);
 399
 400         return count;
 401 }
 402
 403 static ssize_t
 404 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
 405 {
 406         struct w83793_data *data = w83793_update_device(dev);
 407         return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
 408 }
 409
 410 static ssize_t
 411 store_beep_enable(struct device *dev, struct device_attribute *attr,
 412                   const char *buf, size_t count)
 413 {
 414         struct i2c_client *client = to_i2c_client(dev);
 415         struct w83793_data *data = i2c_get_clientdata(client);
 416         unsigned long val;
 417         int err;
 418
 419         err = kstrtoul(buf, 10, &val);
 420         if (err)
 421                 return err;
 422
 423         if (val > 1)
 424                 return -EINVAL;
 425
 426         mutex_lock(&data->update_lock);
 427         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
 428                             & 0xfd;
 429         data->beep_enable |= val << 1;
 430         w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
 431         mutex_unlock(&data->update_lock);
 432
 433         return count;
 434 }
 435
 436 /* Write 0 to clear chassis alarm */
 437 static ssize_t
 438 store_chassis_clear(struct device *dev,
 439                     struct device_attribute *attr, const char *buf,
 440                     size_t count)
 441 {
 442         struct i2c_client *client = to_i2c_client(dev);
 443         struct w83793_data *data = i2c_get_clientdata(client);
 444         unsigned long val;
 445         u8 reg;
 446         int err;
 447
 448         err = kstrtoul(buf, 10, &val);
 449         if (err)
 450                 return err;
 451         if (val)
 452                 return -EINVAL;
 453
 454         mutex_lock(&data->update_lock);
 455         reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 456         w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
 457         data->valid = 0;                /* Force cache refresh */
 458         mutex_unlock(&data->update_lock);
 459         return count;
 460 }
 461
 462 #define FAN_INPUT                       0
 463 #define FAN_MIN                         1
 464 static ssize_t
 465 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 466 {
 467         struct sensor_device_attribute_2 *sensor_attr =
 468             to_sensor_dev_attr_2(attr);
 469         int nr = sensor_attr->nr;
 470         int index = sensor_attr->index;
 471         struct w83793_data *data = w83793_update_device(dev);
 472         u16 val;
 473
 474         if (nr == FAN_INPUT)
 475                 val = data->fan[index] & 0x0fff;
 476         else
 477                 val = data->fan_min[index] & 0x0fff;
 478
 479         return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
 480 }
 481
 482 static ssize_t
 483 store_fan_min(struct device *dev, struct device_attribute *attr,
 484               const char *buf, size_t count)
 485 {
 486         struct sensor_device_attribute_2 *sensor_attr =
 487             to_sensor_dev_attr_2(attr);
 488         int index = sensor_attr->index;
 489         struct i2c_client *client = to_i2c_client(dev);
 490         struct w83793_data *data = i2c_get_clientdata(client);
 491         unsigned long val;
 492         int err;
 493
 494         err = kstrtoul(buf, 10, &val);
 495         if (err)
 496                 return err;
 497         val = FAN_TO_REG(val);
 498
 499         mutex_lock(&data->update_lock);
 500         data->fan_min[index] = val;
 501         w83793_write_value(client, W83793_REG_FAN_MIN(index),
 502                            (val >> 8) & 0xff);
 503         w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
 504         mutex_unlock(&data->update_lock);
 505
 506         return count;
 507 }
 508
 509 static ssize_t
 510 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 511 {
 512         struct sensor_device_attribute_2 *sensor_attr =
 513             to_sensor_dev_attr_2(attr);
 514         struct w83793_data *data = w83793_update_device(dev);
 515         u16 val;
 516         int nr = sensor_attr->nr;
 517         int index = sensor_attr->index;
 518
 519         if (nr == PWM_STOP_TIME)
 520                 val = TIME_FROM_REG(data->pwm_stop_time[index]);
 521         else
 522                 val = (data->pwm[index][nr] & 0x3f) << 2;
 523
 524         return sprintf(buf, "%d\n", val);
 525 }
 526
 527 static ssize_t
 528 store_pwm(struct device *dev, struct device_attribute *attr,
 529           const char *buf, size_t count)
 530 {
 531         struct i2c_client *client = to_i2c_client(dev);
 532         struct w83793_data *data = i2c_get_clientdata(client);
 533         struct sensor_device_attribute_2 *sensor_attr =
 534             to_sensor_dev_attr_2(attr);
 535         int nr = sensor_attr->nr;
 536         int index = sensor_attr->index;
 537         unsigned long val;
 538         int err;
 539
 540         err = kstrtoul(buf, 10, &val);
 541         if (err)
 542                 return err;
 543
 544         mutex_lock(&data->update_lock);
 545         if (nr == PWM_STOP_TIME) {
 546                 val = TIME_TO_REG(val);
 547                 data->pwm_stop_time[index] = val;
 548                 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
 549                                    val);
 550         } else {
 551                 val = clamp_val(val, 0, 0xff) >> 2;
 552                 data->pwm[index][nr] =
 553                     w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
 554                 data->pwm[index][nr] |= val;
 555                 w83793_write_value(client, W83793_REG_PWM(index, nr),
 556                                                         data->pwm[index][nr]);
 557         }
 558
 559         mutex_unlock(&data->update_lock);
 560         return count;
 561 }
 562
 563 static ssize_t
 564 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 565 {
 566         struct sensor_device_attribute_2 *sensor_attr =
 567             to_sensor_dev_attr_2(attr);
 568         int nr = sensor_attr->nr;
 569         int index = sensor_attr->index;
 570         struct w83793_data *data = w83793_update_device(dev);
 571         long temp = TEMP_FROM_REG(data->temp[index][nr]);
 572
 573         if (nr == TEMP_READ && index < 4) {     /* Only TD1-TD4 have low bits */
 574                 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
 575                 temp += temp > 0 ? low : -low;
 576         }
 577         return sprintf(buf, "%ld\n", temp);
 578 }
 579
 580 static ssize_t
 581 store_temp(struct device *dev, struct device_attribute *attr,
 582            const char *buf, size_t count)
 583 {
 584         struct sensor_device_attribute_2 *sensor_attr =
 585             to_sensor_dev_attr_2(attr);
 586         int nr = sensor_attr->nr;
 587         int index = sensor_attr->index;
 588         struct i2c_client *client = to_i2c_client(dev);
 589         struct w83793_data *data = i2c_get_clientdata(client);
 590         long tmp;
 591         int err;
 592
 593         err = kstrtol(buf, 10, &tmp);
 594         if (err)
 595                 return err;
 596
 597         mutex_lock(&data->update_lock);
 598         data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
 599         w83793_write_value(client, W83793_REG_TEMP[index][nr],
 600                            data->temp[index][nr]);
 601         mutex_unlock(&data->update_lock);
 602         return count;
 603 }
 604
 605 /*
 606  * TD1-TD4
 607  * each has 4 mode:(2 bits)
 608  * 0:   Stop monitor
 609  * 1:   Use internal temp sensor(default)
 610  * 2:   Reserved
 611  * 3:   Use sensor in Intel CPU and get result by PECI
 612  *
 613  * TR1-TR2
 614  * each has 2 mode:(1 bit)
 615  * 0:   Disable temp sensor monitor
 616  * 1:   To enable temp sensors monitor
 617  */
 618
 619 /* 0 disable, 6 PECI */
 620 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
 621
 622 static ssize_t
 623 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
 624 {
 625         struct w83793_data *data = w83793_update_device(dev);
 626         struct sensor_device_attribute_2 *sensor_attr =
 627             to_sensor_dev_attr_2(attr);
 628         int index = sensor_attr->index;
 629         u8 mask = (index < 4) ? 0x03 : 0x01;
 630         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 631         u8 tmp;
 632         index = (index < 4) ? 0 : 1;
 633
 634         tmp = (data->temp_mode[index] >> shift) & mask;
 635
 636         /* for the internal sensor, found out if diode or thermistor */
 637         if (tmp == 1)
 638                 tmp = index == 0 ? 3 : 4;
 639         else
 640                 tmp = TO_TEMP_MODE[tmp];
 641
 642         return sprintf(buf, "%d\n", tmp);
 643 }
 644
 645 static ssize_t
 646 store_temp_mode(struct device *dev, struct device_attribute *attr,
 647                 const char *buf, size_t count)
 648 {
 649         struct i2c_client *client = to_i2c_client(dev);
 650         struct w83793_data *data = i2c_get_clientdata(client);
 651         struct sensor_device_attribute_2 *sensor_attr =
 652             to_sensor_dev_attr_2(attr);
 653         int index = sensor_attr->index;
 654         u8 mask = (index < 4) ? 0x03 : 0x01;
 655         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 656         unsigned long val;
 657         int err;
 658
 659         err = kstrtoul(buf, 10, &val);
 660         if (err)
 661                 return err;
 662
 663         /* transform the sysfs interface values into table above */
 664         if ((val == 6) && (index < 4)) {
 665                 val -= 3;
 666         } else if ((val == 3 && index < 4)
 667                 || (val == 4 && index >= 4)) {
 668                 /* transform diode or thermistor into internal enable */
 669                 val = !!val;
 670         } else {
 671                 return -EINVAL;
 672         }
 673
 674         index = (index < 4) ? 0 : 1;
 675         mutex_lock(&data->update_lock);
 676         data->temp_mode[index] =
 677             w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
 678         data->temp_mode[index] &= ~(mask << shift);
 679         data->temp_mode[index] |= val << shift;
 680         w83793_write_value(client, W83793_REG_TEMP_MODE[index],
 681                                                         data->temp_mode[index]);
 682         mutex_unlock(&data->update_lock);
 683
 684         return count;
 685 }
 686
 687 #define SETUP_PWM_DEFAULT               0
 688 #define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
 689 #define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
 690 #define SETUP_TEMP_CRITICAL             3
 691 static ssize_t
 692 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
 693 {
 694         struct sensor_device_attribute_2 *sensor_attr =
 695             to_sensor_dev_attr_2(attr);
 696         int nr = sensor_attr->nr;
 697         struct w83793_data *data = w83793_update_device(dev);
 698         u32 val = 0;
 699
 700         if (nr == SETUP_PWM_DEFAULT)
 701                 val = (data->pwm_default & 0x3f) << 2;
 702         else if (nr == SETUP_PWM_UPTIME)
 703                 val = TIME_FROM_REG(data->pwm_uptime);
 704         else if (nr == SETUP_PWM_DOWNTIME)
 705                 val = TIME_FROM_REG(data->pwm_downtime);
 706         else if (nr == SETUP_TEMP_CRITICAL)
 707                 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
 708
 709         return sprintf(buf, "%d\n", val);
 710 }
 711
 712 static ssize_t
 713 store_sf_setup(struct device *dev, struct device_attribute *attr,
 714                const char *buf, size_t count)
 715 {
 716         struct sensor_device_attribute_2 *sensor_attr =
 717             to_sensor_dev_attr_2(attr);
 718         int nr = sensor_attr->nr;
 719         struct i2c_client *client = to_i2c_client(dev);
 720         struct w83793_data *data = i2c_get_clientdata(client);
 721         long val;
 722         int err;
 723
 724         err = kstrtol(buf, 10, &val);
 725         if (err)
 726                 return err;
 727
 728         mutex_lock(&data->update_lock);
 729         if (nr == SETUP_PWM_DEFAULT) {
 730                 data->pwm_default =
 731                     w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
 732                 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
 733                 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
 734                                                         data->pwm_default);
 735         } else if (nr == SETUP_PWM_UPTIME) {
 736                 data->pwm_uptime = TIME_TO_REG(val);
 737                 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
 738                 w83793_write_value(client, W83793_REG_PWM_UPTIME,
 739                                                         data->pwm_uptime);
 740         } else if (nr == SETUP_PWM_DOWNTIME) {
 741                 data->pwm_downtime = TIME_TO_REG(val);
 742                 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
 743                 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
 744                                                         data->pwm_downtime);
 745         } else {                /* SETUP_TEMP_CRITICAL */
 746                 data->temp_critical =
 747                     w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
 748                 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
 749                 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
 750                                                         data->temp_critical);
 751         }
 752
 753         mutex_unlock(&data->update_lock);
 754         return count;
 755 }
 756
 757 /*
 758  * Temp SmartFan control
 759  * TEMP_FAN_MAP
 760  * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
 761  * It's possible two or more temp channels control the same fan, w83793
 762  * always prefers to pick the most critical request and applies it to
 763  * the related Fan.
 764  * It's possible one fan is not in any mapping of 6 temp channels, this
 765  * means the fan is manual mode
 766  *
 767  * TEMP_PWM_ENABLE
 768  * Each temp channel has its own SmartFan mode, and temp channel
 769  * control fans that are set by TEMP_FAN_MAP
 770  * 0:   SmartFanII mode
 771  * 1:   Thermal Cruise Mode
 772  *
 773  * TEMP_CRUISE
 774  * Target temperature in thermal cruise mode, w83793 will try to turn
 775  * fan speed to keep the temperature of target device around this
 776  * temperature.
 777  *
 778  * TEMP_TOLERANCE
 779  * If Temp higher or lower than target with this tolerance, w83793
 780  * will take actions to speed up or slow down the fan to keep the
 781  * temperature within the tolerance range.
 782  */
 783
 784 #define TEMP_FAN_MAP                    0
 785 #define TEMP_PWM_ENABLE                 1
 786 #define TEMP_CRUISE                     2
 787 #define TEMP_TOLERANCE                  3
 788 static ssize_t
 789 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
 790 {
 791         struct sensor_device_attribute_2 *sensor_attr =
 792             to_sensor_dev_attr_2(attr);
 793         int nr = sensor_attr->nr;
 794         int index = sensor_attr->index;
 795         struct w83793_data *data = w83793_update_device(dev);
 796         u32 val;
 797
 798         if (nr == TEMP_FAN_MAP) {
 799                 val = data->temp_fan_map[index];
 800         } else if (nr == TEMP_PWM_ENABLE) {
 801                 /* +2 to transform into 2 and 3 to conform with sysfs intf */
 802                 val = ((data->pwm_enable >> index) & 0x01) + 2;
 803         } else if (nr == TEMP_CRUISE) {
 804                 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
 805         } else {                /* TEMP_TOLERANCE */
 806                 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
 807                 val = TEMP_FROM_REG(val & 0x0f);
 808         }
 809         return sprintf(buf, "%d\n", val);
 810 }
 811
 812 static ssize_t
 813 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
 814               const char *buf, size_t count)
 815 {
 816         struct sensor_device_attribute_2 *sensor_attr =
 817             to_sensor_dev_attr_2(attr);
 818         int nr = sensor_attr->nr;
 819         int index = sensor_attr->index;
 820         struct i2c_client *client = to_i2c_client(dev);
 821         struct w83793_data *data = i2c_get_clientdata(client);
 822         long val;
 823         int err;
 824
 825         err = kstrtol(buf, 10, &val);
 826         if (err)
 827                 return err;
 828
 829         mutex_lock(&data->update_lock);
 830         if (nr == TEMP_FAN_MAP) {
 831                 val = clamp_val(val, 0, 255);
 832                 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
 833                 data->temp_fan_map[index] = val;
 834         } else if (nr == TEMP_PWM_ENABLE) {
 835                 if (val == 2 || val == 3) {
 836                         data->pwm_enable =
 837                             w83793_read_value(client, W83793_REG_PWM_ENABLE);
 838                         if (val - 2)
 839                                 data->pwm_enable |= 1 << index;
 840                         else
 841                                 data->pwm_enable &= ~(1 << index);
 842                         w83793_write_value(client, W83793_REG_PWM_ENABLE,
 843                                                         data->pwm_enable);
 844                 } else {
 845                         mutex_unlock(&data->update_lock);
 846                         return -EINVAL;
 847                 }
 848         } else if (nr == TEMP_CRUISE) {
 849                 data->temp_cruise[index] =
 850                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
 851                 data->temp_cruise[index] &= 0x80;
 852                 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
 853
 854                 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
 855                                                 data->temp_cruise[index]);
 856         } else {                /* TEMP_TOLERANCE */
 857                 int i = index >> 1;
 858                 u8 shift = (index & 0x01) ? 4 : 0;
 859                 data->tolerance[i] =
 860                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
 861
 862                 data->tolerance[i] &= ~(0x0f << shift);
 863                 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
 864                 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
 865                                                         data->tolerance[i]);
 866         }
 867
 868         mutex_unlock(&data->update_lock);
 869         return count;
 870 }
 871
 872 static ssize_t
 873 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 874 {
 875         struct sensor_device_attribute_2 *sensor_attr =
 876             to_sensor_dev_attr_2(attr);
 877         int nr = sensor_attr->nr;
 878         int index = sensor_attr->index;
 879         struct w83793_data *data = w83793_update_device(dev);
 880
 881         return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
 882 }
 883
 884 static ssize_t
 885 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
 886               const char *buf, size_t count)
 887 {
 888         struct i2c_client *client = to_i2c_client(dev);
 889         struct w83793_data *data = i2c_get_clientdata(client);
 890         struct sensor_device_attribute_2 *sensor_attr =
 891             to_sensor_dev_attr_2(attr);
 892         int nr = sensor_attr->nr;
 893         int index = sensor_attr->index;
 894         unsigned long val;
 895         int err;
 896
 897         err = kstrtoul(buf, 10, &val);
 898         if (err)
 899                 return err;
 900         val = clamp_val(val, 0, 0xff) >> 2;
 901
 902         mutex_lock(&data->update_lock);
 903         data->sf2_pwm[index][nr] =
 904             w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
 905         data->sf2_pwm[index][nr] |= val;
 906         w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
 907                                                 data->sf2_pwm[index][nr]);
 908         mutex_unlock(&data->update_lock);
 909         return count;
 910 }
 911
 912 static ssize_t
 913 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
 914 {
 915         struct sensor_device_attribute_2 *sensor_attr =
 916             to_sensor_dev_attr_2(attr);
 917         int nr = sensor_attr->nr;
 918         int index = sensor_attr->index;
 919         struct w83793_data *data = w83793_update_device(dev);
 920
 921         return sprintf(buf, "%ld\n",
 922                        TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
 923 }
 924
 925 static ssize_t
 926 store_sf2_temp(struct device *dev, struct device_attribute *attr,
 927                const char *buf, size_t count)
 928 {
 929         struct i2c_client *client = to_i2c_client(dev);
 930         struct w83793_data *data = i2c_get_clientdata(client);
 931         struct sensor_device_attribute_2 *sensor_attr =
 932             to_sensor_dev_attr_2(attr);
 933         int nr = sensor_attr->nr;
 934         int index = sensor_attr->index;
 935         long val;
 936         int err;
 937
 938         err = kstrtol(buf, 10, &val);
 939         if (err)
 940                 return err;
 941         val = TEMP_TO_REG(val, 0, 0x7f);
 942
 943         mutex_lock(&data->update_lock);
 944         data->sf2_temp[index][nr] =
 945             w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
 946         data->sf2_temp[index][nr] |= val;
 947         w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
 948                                              data->sf2_temp[index][nr]);
 949         mutex_unlock(&data->update_lock);
 950         return count;
 951 }
 952
 953 /* only Vcore A/B and Vtt have additional 2 bits precision */
 954 static ssize_t
 955 show_in(struct device *dev, struct device_attribute *attr, char *buf)
 956 {
 957         struct sensor_device_attribute_2 *sensor_attr =
 958             to_sensor_dev_attr_2(attr);
 959         int nr = sensor_attr->nr;
 960         int index = sensor_attr->index;
 961         struct w83793_data *data = w83793_update_device(dev);
 962         u16 val = data->in[index][nr];
 963
 964         if (index < 3) {
 965                 val <<= 2;
 966                 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
 967         }
 968         /* voltage inputs 5VDD and 5VSB needs 150mV offset */
 969         val = val * scale_in[index] + scale_in_add[index];
 970         return sprintf(buf, "%d\n", val);
 971 }
 972
 973 static ssize_t
 974 store_in(struct device *dev, struct device_attribute *attr,
 975          const char *buf, size_t count)
 976 {
 977         struct sensor_device_attribute_2 *sensor_attr =
 978             to_sensor_dev_attr_2(attr);
 979         int nr = sensor_attr->nr;
 980         int index = sensor_attr->index;
 981         struct i2c_client *client = to_i2c_client(dev);
 982         struct w83793_data *data = i2c_get_clientdata(client);
 983         unsigned long val;
 984         int err;
 985
 986         err = kstrtoul(buf, 10, &val);
 987         if (err)
 988                 return err;
 989         val = (val + scale_in[index] / 2) / scale_in[index];
 990
 991         mutex_lock(&data->update_lock);
 992         if (index > 2) {
 993                 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
 994                 if (nr == 1 || nr == 2)
 995                         val -= scale_in_add[index] / scale_in[index];
 996                 val = clamp_val(val, 0, 255);
 997         } else {
 998                 val = clamp_val(val, 0, 0x3FF);
 999                 data->in_low_bits[nr] =
1000                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1001                 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1002                 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1003                 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1004                                                      data->in_low_bits[nr]);
1005                 val >>= 2;
1006         }
1007         data->in[index][nr] = val;
1008         w83793_write_value(client, W83793_REG_IN[index][nr],
1009                                                         data->in[index][nr]);
1010         mutex_unlock(&data->update_lock);
1011         return count;
1012 }
1013
1014 #define NOT_USED                        -1
1015
1016 #define SENSOR_ATTR_IN(index)                                           \
1017         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1018                 IN_READ, index),                                        \
1019         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1020                 store_in, IN_MAX, index),                               \
1021         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1022                 store_in, IN_LOW, index),                               \
1023         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1024                 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
1025         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1026                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1027                 index + ((index > 2) ? 1 : 0))
1028
1029 #define SENSOR_ATTR_FAN(index)                                          \
1030         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1031                 NULL, ALARM_STATUS, index + 17),                        \
1032         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1033                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
1034         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1035                 NULL, FAN_INPUT, index - 1),                            \
1036         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1037                 show_fan, store_fan_min, FAN_MIN, index - 1)
1038
1039 #define SENSOR_ATTR_PWM(index)                                          \
1040         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1041                 store_pwm, PWM_DUTY, index - 1),                        \
1042         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1043                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1044         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1045                 show_pwm, store_pwm, PWM_START, index - 1),             \
1046         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1047                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1048
1049 #define SENSOR_ATTR_TEMP(index)                                         \
1050         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1051                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1052         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1053                 NULL, TEMP_READ, index - 1),                            \
1054         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1055                 store_temp, TEMP_CRIT, index - 1),                      \
1056         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1057                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1058         SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1059                 store_temp, TEMP_WARN, index - 1),                      \
1060         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1061                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1062         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1063                 show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1064         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1065                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1066         SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1067                 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1068                 TEMP_FAN_MAP, index - 1),                               \
1069         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1070                 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1071                 index - 1),                                             \
1072         SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1073                 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1074         SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1075                 store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1076         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1077                 show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1078         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1079                 show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1080         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1081                 show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1082         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1083                 show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1084         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1085                 show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1086         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1087                 show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1088         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1089                 show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1090         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1091                 show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1092         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1093                 show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1094         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1095                 show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1096         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1097                 show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1098         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1099                 show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1100         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1101                 show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1102         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1103                 show_sf2_temp, store_sf2_temp, 6, index - 1)
1104
1105 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1106         SENSOR_ATTR_IN(0),
1107         SENSOR_ATTR_IN(1),
1108         SENSOR_ATTR_IN(2),
1109         SENSOR_ATTR_IN(3),
1110         SENSOR_ATTR_IN(4),
1111         SENSOR_ATTR_IN(5),
1112         SENSOR_ATTR_IN(6),
1113         SENSOR_ATTR_IN(7),
1114         SENSOR_ATTR_IN(8),
1115         SENSOR_ATTR_IN(9),
1116         SENSOR_ATTR_FAN(1),
1117         SENSOR_ATTR_FAN(2),
1118         SENSOR_ATTR_FAN(3),
1119         SENSOR_ATTR_FAN(4),
1120         SENSOR_ATTR_FAN(5),
1121         SENSOR_ATTR_PWM(1),
1122         SENSOR_ATTR_PWM(2),
1123         SENSOR_ATTR_PWM(3),
1124 };
1125
1126 static struct sensor_device_attribute_2 w83793_temp[] = {
1127         SENSOR_ATTR_TEMP(1),
1128         SENSOR_ATTR_TEMP(2),
1129         SENSOR_ATTR_TEMP(3),
1130         SENSOR_ATTR_TEMP(4),
1131         SENSOR_ATTR_TEMP(5),
1132         SENSOR_ATTR_TEMP(6),
1133 };
1134
1135 /* Fan6-Fan12 */
1136 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1137         SENSOR_ATTR_FAN(6),
1138         SENSOR_ATTR_FAN(7),
1139         SENSOR_ATTR_FAN(8),
1140         SENSOR_ATTR_FAN(9),
1141         SENSOR_ATTR_FAN(10),
1142         SENSOR_ATTR_FAN(11),
1143         SENSOR_ATTR_FAN(12),
1144 };
1145
1146 /* Pwm4-Pwm8 */
1147 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1148         SENSOR_ATTR_PWM(4),
1149         SENSOR_ATTR_PWM(5),
1150         SENSOR_ATTR_PWM(6),
1151         SENSOR_ATTR_PWM(7),
1152         SENSOR_ATTR_PWM(8),
1153 };
1154
1155 static struct sensor_device_attribute_2 w83793_vid[] = {
1156         SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1157         SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1158 };
1159 static DEVICE_ATTR_RW(vrm);
1160
1161 static struct sensor_device_attribute_2 sda_single_files[] = {
1162         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1163                       store_chassis_clear, ALARM_STATUS, 30),
1164         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1165                       store_beep_enable, NOT_USED, NOT_USED),
1166         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1167                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1168         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1169                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1170         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1171                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1172         SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1173                       store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1174 };
1175
1176 static void w83793_init_client(struct i2c_client *client)
1177 {
1178         if (reset)
1179                 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1180
1181         /* Start monitoring */
1182         w83793_write_value(client, W83793_REG_CONFIG,
1183                            w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1184 }
1185
1186 /*
1187  * Watchdog routines
1188  */
1189
1190 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1191 {
1192         unsigned int mtimeout;
1193         int ret;
1194
1195         mtimeout = DIV_ROUND_UP(timeout, 60);
1196
1197         if (mtimeout > 255)
1198                 return -EINVAL;
1199
1200         mutex_lock(&data->watchdog_lock);
1201         if (!data->client) {
1202                 ret = -ENODEV;
1203                 goto leave;
1204         }
1205
1206         data->watchdog_timeout = mtimeout;
1207
1208         /* Set Timeout value (in Minutes) */
1209         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1210                            data->watchdog_timeout);
1211
1212         ret = mtimeout * 60;
1213
1214 leave:
1215         mutex_unlock(&data->watchdog_lock);
1216         return ret;
1217 }
1218
1219 static int watchdog_get_timeout(struct w83793_data *data)
1220 {
1221         int timeout;
1222
1223         mutex_lock(&data->watchdog_lock);
1224         timeout = data->watchdog_timeout * 60;
1225         mutex_unlock(&data->watchdog_lock);
1226
1227         return timeout;
1228 }
1229
1230 static int watchdog_trigger(struct w83793_data *data)
1231 {
1232         int ret = 0;
1233
1234         mutex_lock(&data->watchdog_lock);
1235         if (!data->client) {
1236                 ret = -ENODEV;
1237                 goto leave;
1238         }
1239
1240         /* Set Timeout value (in Minutes) */
1241         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1242                            data->watchdog_timeout);
1243
1244 leave:
1245         mutex_unlock(&data->watchdog_lock);
1246         return ret;
1247 }
1248
1249 static int watchdog_enable(struct w83793_data *data)
1250 {
1251         int ret = 0;
1252
1253         mutex_lock(&data->watchdog_lock);
1254         if (!data->client) {
1255                 ret = -ENODEV;
1256                 goto leave;
1257         }
1258
1259         /* Set initial timeout */
1260         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1261                            data->watchdog_timeout);
1262
1263         /* Enable Soft Watchdog */
1264         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1265
1266 leave:
1267         mutex_unlock(&data->watchdog_lock);
1268         return ret;
1269 }
1270
1271 static int watchdog_disable(struct w83793_data *data)
1272 {
1273         int ret = 0;
1274
1275         mutex_lock(&data->watchdog_lock);
1276         if (!data->client) {
1277                 ret = -ENODEV;
1278                 goto leave;
1279         }
1280
1281         /* Disable Soft Watchdog */
1282         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1283
1284 leave:
1285         mutex_unlock(&data->watchdog_lock);
1286         return ret;
1287 }
1288
1289 static int watchdog_open(struct inode *inode, struct file *filp)
1290 {
1291         struct w83793_data *pos, *data = NULL;
1292         int watchdog_is_open;
1293
1294         /*
1295          * We get called from drivers/char/misc.c with misc_mtx hold, and we
1296          * call misc_register() from  w83793_probe() with watchdog_data_mutex
1297          * hold, as misc_register() takes the misc_mtx lock, this is a possible
1298          * deadlock, so we use mutex_trylock here.
1299          */
1300         if (!mutex_trylock(&watchdog_data_mutex))
1301                 return -ERESTARTSYS;
1302         list_for_each_entry(pos, &watchdog_data_list, list) {
1303                 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1304                         data = pos;
1305                         break;
1306                 }
1307         }
1308
1309         /* Check, if device is already open */
1310         watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1311
1312         /*
1313          * Increase data reference counter (if not already done).
1314          * Note we can never not have found data, so we don't check for this
1315          */
1316         if (!watchdog_is_open)
1317                 kref_get(&data->kref);
1318
1319         mutex_unlock(&watchdog_data_mutex);
1320
1321         /* Check, if device is already open and possibly issue error */
1322         if (watchdog_is_open)
1323                 return -EBUSY;
1324
1325         /* Enable Soft Watchdog */
1326         watchdog_enable(data);
1327
1328         /* Store pointer to data into filp's private data */
1329         filp->private_data = data;
1330
1331         return stream_open(inode, filp);
1332 }
1333
1334 static int watchdog_close(struct inode *inode, struct file *filp)
1335 {
1336         struct w83793_data *data = filp->private_data;
1337
1338         if (data->watchdog_expect_close) {
1339                 watchdog_disable(data);
1340                 data->watchdog_expect_close = 0;
1341         } else {
1342                 watchdog_trigger(data);
1343                 dev_crit(&data->client->dev,
1344                         "unexpected close, not stopping watchdog!\n");
1345         }
1346
1347         clear_bit(0, &data->watchdog_is_open);
1348
1349         /* Decrease data reference counter */
1350         mutex_lock(&watchdog_data_mutex);
1351         kref_put(&data->kref, w83793_release_resources);
1352         mutex_unlock(&watchdog_data_mutex);
1353
1354         return 0;
1355 }
1356
1357 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1358         size_t count, loff_t *offset)
1359 {
1360         ssize_t ret;
1361         struct w83793_data *data = filp->private_data;
1362
1363         if (count) {
1364                 if (!nowayout) {
1365                         size_t i;
1366
1367                         /* Clear it in case it was set with a previous write */
1368                         data->watchdog_expect_close = 0;
1369
1370                         for (i = 0; i != count; i++) {
1371                                 char c;
1372                                 if (get_user(c, buf + i))
1373                                         return -EFAULT;
1374                                 if (c == 'V')
1375                                         data->watchdog_expect_close = 1;
1376                         }
1377                 }
1378                 ret = watchdog_trigger(data);
1379                 if (ret < 0)
1380                         return ret;
1381         }
1382         return count;
1383 }
1384
1385 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1386                            unsigned long arg)
1387 {
1388         struct watchdog_info ident = {
1389                 .options = WDIOF_KEEPALIVEPING |
1390                            WDIOF_SETTIMEOUT |
1391                            WDIOF_CARDRESET,
1392                 .identity = "w83793 watchdog"
1393         };
1394
1395         int val, ret = 0;
1396         struct w83793_data *data = filp->private_data;
1397
1398         switch (cmd) {
1399         case WDIOC_GETSUPPORT:
1400                 if (!nowayout)
1401                         ident.options |= WDIOF_MAGICCLOSE;
1402                 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1403                         ret = -EFAULT;
1404                 break;
1405
1406         case WDIOC_GETSTATUS:
1407                 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1408                 ret = put_user(val, (int __user *)arg);
1409                 break;
1410
1411         case WDIOC_GETBOOTSTATUS:
1412                 ret = put_user(0, (int __user *)arg);
1413                 break;
1414
1415         case WDIOC_KEEPALIVE:
1416                 ret = watchdog_trigger(data);
1417                 break;
1418
1419         case WDIOC_GETTIMEOUT:
1420                 val = watchdog_get_timeout(data);
1421                 ret = put_user(val, (int __user *)arg);
1422                 break;
1423
1424         case WDIOC_SETTIMEOUT:
1425                 if (get_user(val, (int __user *)arg)) {
1426                         ret = -EFAULT;
1427                         break;
1428                 }
1429                 ret = watchdog_set_timeout(data, val);
1430                 if (ret > 0)
1431                         ret = put_user(ret, (int __user *)arg);
1432                 break;
1433
1434         case WDIOC_SETOPTIONS:
1435                 if (get_user(val, (int __user *)arg)) {
1436                         ret = -EFAULT;
1437                         break;
1438                 }
1439
1440                 if (val & WDIOS_DISABLECARD)
1441                         ret = watchdog_disable(data);
1442                 else if (val & WDIOS_ENABLECARD)
1443                         ret = watchdog_enable(data);
1444                 else
1445                         ret = -EINVAL;
1446
1447                 break;
1448         default:
1449                 ret = -ENOTTY;
1450         }
1451         return ret;
1452 }
1453
1454 static const struct file_operations watchdog_fops = {
1455         .owner = THIS_MODULE,
1456         .llseek = no_llseek,
1457         .open = watchdog_open,
1458         .release = watchdog_close,
1459         .write = watchdog_write,
1460         .unlocked_ioctl = watchdog_ioctl,
1461 };
1462
1463 /*
1464  *      Notifier for system down
1465  */
1466
1467 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1468                                void *unused)
1469 {
1470         struct w83793_data *data = NULL;
1471
1472         if (code == SYS_DOWN || code == SYS_HALT) {
1473
1474                 /* Disable each registered watchdog */
1475                 mutex_lock(&watchdog_data_mutex);
1476                 list_for_each_entry(data, &watchdog_data_list, list) {
1477                         if (data->watchdog_miscdev.minor)
1478                                 watchdog_disable(data);
1479                 }
1480                 mutex_unlock(&watchdog_data_mutex);
1481         }
1482
1483         return NOTIFY_DONE;
1484 }
1485
1486 /*
1487  *      The WDT needs to learn about soft shutdowns in order to
1488  *      turn the timebomb registers off.
1489  */
1490
1491 static struct notifier_block watchdog_notifier = {
1492         .notifier_call = watchdog_notify_sys,
1493 };
1494
1495 /*
1496  * Init / remove routines
1497  */
1498
1499 static int w83793_remove(struct i2c_client *client)
1500 {
1501         struct w83793_data *data = i2c_get_clientdata(client);
1502         struct device *dev = &client->dev;
1503         int i, tmp;
1504
1505         /* Unregister the watchdog (if registered) */
1506         if (data->watchdog_miscdev.minor) {
1507                 misc_deregister(&data->watchdog_miscdev);
1508
1509                 if (data->watchdog_is_open) {
1510                         dev_warn(&client->dev,
1511                                 "i2c client detached with watchdog open! "
1512                                 "Stopping watchdog.\n");
1513                         watchdog_disable(data);
1514                 }
1515
1516                 mutex_lock(&watchdog_data_mutex);
1517                 list_del(&data->list);
1518                 mutex_unlock(&watchdog_data_mutex);
1519
1520                 /* Tell the watchdog code the client is gone */
1521                 mutex_lock(&data->watchdog_lock);
1522                 data->client = NULL;
1523                 mutex_unlock(&data->watchdog_lock);
1524         }
1525
1526         /* Reset Configuration Register to Disable Watch Dog Registers */
1527         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1528         w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1529
1530         unregister_reboot_notifier(&watchdog_notifier);
1531
1532         hwmon_device_unregister(data->hwmon_dev);
1533
1534         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1535                 device_remove_file(dev,
1536                                    &w83793_sensor_attr_2[i].dev_attr);
1537
1538         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1539                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1540
1541         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1542                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1543         device_remove_file(dev, &dev_attr_vrm);
1544
1545         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1546                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1547
1548         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1549                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1550
1551         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1552                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1553
1554         i2c_unregister_device(data->lm75[0]);
1555         i2c_unregister_device(data->lm75[1]);
1556
1557         /* Decrease data reference counter */
1558         mutex_lock(&watchdog_data_mutex);
1559         kref_put(&data->kref, w83793_release_resources);
1560         mutex_unlock(&watchdog_data_mutex);
1561
1562         return 0;
1563 }
1564
1565 static int
1566 w83793_detect_subclients(struct i2c_client *client)
1567 {
1568         int i, id, err;
1569         int address = client->addr;
1570         u8 tmp;
1571         struct i2c_adapter *adapter = client->adapter;
1572         struct w83793_data *data = i2c_get_clientdata(client);
1573
1574         id = i2c_adapter_id(adapter);
1575         if (force_subclients[0] == id && force_subclients[1] == address) {
1576                 for (i = 2; i <= 3; i++) {
1577                         if (force_subclients[i] < 0x48
1578                             || force_subclients[i] > 0x4f) {
1579                                 dev_err(&client->dev,
1580                                         "invalid subclient "
1581                                         "address %d; must be 0x48-0x4f\n",
1582                                         force_subclients[i]);
1583                                 err = -EINVAL;
1584                                 goto ERROR_SC_0;
1585                         }
1586                 }
1587                 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1588                                    (force_subclients[2] & 0x07) |
1589                                    ((force_subclients[3] & 0x07) << 4));
1590         }
1591
1592         tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1593         if (!(tmp & 0x08))
1594                 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1595         if (!(tmp & 0x80)) {
1596                 if ((data->lm75[0] != NULL)
1597                     && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1598                         dev_err(&client->dev,
1599                                 "duplicate addresses 0x%x, "
1600                                 "use force_subclients\n", data->lm75[0]->addr);
1601                         err = -ENODEV;
1602                         goto ERROR_SC_1;
1603                 }
1604                 data->lm75[1] = i2c_new_dummy(adapter,
1605                                               0x48 + ((tmp >> 4) & 0x7));
1606         }
1607
1608         return 0;
1609
1610         /* Undo inits in case of errors */
1611
1612 ERROR_SC_1:
1613         i2c_unregister_device(data->lm75[0]);
1614 ERROR_SC_0:
1615         return err;
1616 }
1617
1618 /* Return 0 if detection is successful, -ENODEV otherwise */
1619 static int w83793_detect(struct i2c_client *client,
1620                          struct i2c_board_info *info)
1621 {
1622         u8 tmp, bank, chip_id;
1623         struct i2c_adapter *adapter = client->adapter;
1624         unsigned short address = client->addr;
1625
1626         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1627                 return -ENODEV;
1628
1629         bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1630
1631         tmp = bank & 0x80 ? 0x5c : 0xa3;
1632         /* Check Winbond vendor ID */
1633         if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1634                 pr_debug("w83793: Detection failed at check vendor id\n");
1635                 return -ENODEV;
1636         }
1637
1638         /*
1639          * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1640          * should match
1641          */
1642         if ((bank & 0x07) == 0
1643          && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1644             (address << 1)) {
1645                 pr_debug("w83793: Detection failed at check i2c addr\n");
1646                 return -ENODEV;
1647         }
1648
1649         /* Determine the chip type now */
1650         chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1651         if (chip_id != 0x7b)
1652                 return -ENODEV;
1653
1654         strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1655
1656         return 0;
1657 }
1658
1659 static int w83793_probe(struct i2c_client *client,
1660                         const struct i2c_device_id *id)
1661 {
1662         struct device *dev = &client->dev;
1663         static const int watchdog_minors[] = {
1664                 WATCHDOG_MINOR, 212, 213, 214, 215
1665         };
1666         struct w83793_data *data;
1667         int i, tmp, val, err;
1668         int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1669         int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1670         int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1671
1672         data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1673         if (!data) {
1674                 err = -ENOMEM;
1675                 goto exit;
1676         }
1677
1678         i2c_set_clientdata(client, data);
1679         data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1680         mutex_init(&data->update_lock);
1681         mutex_init(&data->watchdog_lock);
1682         INIT_LIST_HEAD(&data->list);
1683         kref_init(&data->kref);
1684
1685         /*
1686          * Store client pointer in our data struct for watchdog usage
1687          * (where the client is found through a data ptr instead of the
1688          * otherway around)
1689          */
1690         data->client = client;
1691
1692         err = w83793_detect_subclients(client);
1693         if (err)
1694                 goto free_mem;
1695
1696         /* Initialize the chip */
1697         w83793_init_client(client);
1698
1699         /*
1700          * Only fan 1-5 has their own input pins,
1701          * Pwm 1-3 has their own pins
1702          */
1703         data->has_fan = 0x1f;
1704         data->has_pwm = 0x07;
1705         tmp = w83793_read_value(client, W83793_REG_MFC);
1706         val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1707
1708         /* check the function of pins 49-56 */
1709         if (tmp & 0x80) {
1710                 data->has_vid |= 0x2;   /* has VIDB */
1711         } else {
1712                 data->has_pwm |= 0x18;  /* pwm 4,5 */
1713                 if (val & 0x01) {       /* fan 6 */
1714                         data->has_fan |= 0x20;
1715                         data->has_pwm |= 0x20;
1716                 }
1717                 if (val & 0x02) {       /* fan 7 */
1718                         data->has_fan |= 0x40;
1719                         data->has_pwm |= 0x40;
1720                 }
1721                 if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1722                         data->has_fan |= 0x80;
1723                         data->has_pwm |= 0x80;
1724                 }
1725         }
1726
1727         /* check the function of pins 37-40 */
1728         if (!(tmp & 0x29))
1729                 data->has_vid |= 0x1;   /* has VIDA */
1730         if (0x08 == (tmp & 0x0c)) {
1731                 if (val & 0x08) /* fan 9 */
1732                         data->has_fan |= 0x100;
1733                 if (val & 0x10) /* fan 10 */
1734                         data->has_fan |= 0x200;
1735         }
1736         if (0x20 == (tmp & 0x30)) {
1737                 if (val & 0x20) /* fan 11 */
1738                         data->has_fan |= 0x400;
1739                 if (val & 0x40) /* fan 12 */
1740                         data->has_fan |= 0x800;
1741         }
1742
1743         if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1744                 data->has_fan |= 0x80;
1745                 data->has_pwm |= 0x80;
1746         }
1747
1748         tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1749         if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1750                 data->has_fan |= 0x100;
1751         }
1752         if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1753                 data->has_fan |= 0x200;
1754         }
1755         if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1756                 data->has_fan |= 0x400;
1757         }
1758         if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1759                 data->has_fan |= 0x800;
1760         }
1761
1762         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1763         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1764         if (tmp & 0x01)
1765                 data->has_temp |= 0x01;
1766         if (tmp & 0x04)
1767                 data->has_temp |= 0x02;
1768         if (tmp & 0x10)
1769                 data->has_temp |= 0x04;
1770         if (tmp & 0x40)
1771                 data->has_temp |= 0x08;
1772
1773         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1774         if (tmp & 0x01)
1775                 data->has_temp |= 0x10;
1776         if (tmp & 0x02)
1777                 data->has_temp |= 0x20;
1778
1779         /* Register sysfs hooks */
1780         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1781                 err = device_create_file(dev,
1782                                          &w83793_sensor_attr_2[i].dev_attr);
1783                 if (err)
1784                         goto exit_remove;
1785         }
1786
1787         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1788                 if (!(data->has_vid & (1 << i)))
1789                         continue;
1790                 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1791                 if (err)
1792                         goto exit_remove;
1793         }
1794         if (data->has_vid) {
1795                 data->vrm = vid_which_vrm();
1796                 err = device_create_file(dev, &dev_attr_vrm);
1797                 if (err)
1798                         goto exit_remove;
1799         }
1800
1801         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1802                 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1803                 if (err)
1804                         goto exit_remove;
1805
1806         }
1807
1808         for (i = 0; i < 6; i++) {
1809                 int j;
1810                 if (!(data->has_temp & (1 << i)))
1811                         continue;
1812                 for (j = 0; j < files_temp; j++) {
1813                         err = device_create_file(dev,
1814                                                 &w83793_temp[(i) * files_temp
1815                                                                 + j].dev_attr);
1816                         if (err)
1817                                 goto exit_remove;
1818                 }
1819         }
1820
1821         for (i = 5; i < 12; i++) {
1822                 int j;
1823                 if (!(data->has_fan & (1 << i)))
1824                         continue;
1825                 for (j = 0; j < files_fan; j++) {
1826                         err = device_create_file(dev,
1827                                            &w83793_left_fan[(i - 5) * files_fan
1828                                                                 + j].dev_attr);
1829                         if (err)
1830                                 goto exit_remove;
1831                 }
1832         }
1833
1834         for (i = 3; i < 8; i++) {
1835                 int j;
1836                 if (!(data->has_pwm & (1 << i)))
1837                         continue;
1838                 for (j = 0; j < files_pwm; j++) {
1839                         err = device_create_file(dev,
1840                                            &w83793_left_pwm[(i - 3) * files_pwm
1841                                                                 + j].dev_attr);
1842                         if (err)
1843                                 goto exit_remove;
1844                 }
1845         }
1846
1847         data->hwmon_dev = hwmon_device_register(dev);
1848         if (IS_ERR(data->hwmon_dev)) {
1849                 err = PTR_ERR(data->hwmon_dev);
1850                 goto exit_remove;
1851         }
1852
1853         /* Watchdog initialization */
1854
1855         /* Register boot notifier */
1856         err = register_reboot_notifier(&watchdog_notifier);
1857         if (err != 0) {
1858                 dev_err(&client->dev,
1859                         "cannot register reboot notifier (err=%d)\n", err);
1860                 goto exit_devunreg;
1861         }
1862
1863         /*
1864          * Enable Watchdog registers.
1865          * Set Configuration Register to Enable Watch Dog Registers
1866          * (Bit 2) = XXXX, X1XX.
1867          */
1868         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1869         w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1870
1871         /* Set the default watchdog timeout */
1872         data->watchdog_timeout = timeout;
1873
1874         /* Check, if last reboot was caused by watchdog */
1875         data->watchdog_caused_reboot =
1876           w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1877
1878         /* Disable Soft Watchdog during initialiation */
1879         watchdog_disable(data);
1880
1881         /*
1882          * We take the data_mutex lock early so that watchdog_open() cannot
1883          * run when misc_register() has completed, but we've not yet added
1884          * our data to the watchdog_data_list (and set the default timeout)
1885          */
1886         mutex_lock(&watchdog_data_mutex);
1887         for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1888                 /* Register our watchdog part */
1889                 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1890                         "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1891                 data->watchdog_miscdev.name = data->watchdog_name;
1892                 data->watchdog_miscdev.fops = &watchdog_fops;
1893                 data->watchdog_miscdev.minor = watchdog_minors[i];
1894
1895                 err = misc_register(&data->watchdog_miscdev);
1896                 if (err == -EBUSY)
1897                         continue;
1898                 if (err) {
1899                         data->watchdog_miscdev.minor = 0;
1900                         dev_err(&client->dev,
1901                                 "Registering watchdog chardev: %d\n", err);
1902                         break;
1903                 }
1904
1905                 list_add(&data->list, &watchdog_data_list);
1906
1907                 dev_info(&client->dev,
1908                         "Registered watchdog chardev major 10, minor: %d\n",
1909                         watchdog_minors[i]);
1910                 break;
1911         }
1912         if (i == ARRAY_SIZE(watchdog_minors)) {
1913                 data->watchdog_miscdev.minor = 0;
1914                 dev_warn(&client->dev,
1915                          "Couldn't register watchdog chardev (due to no free minor)\n");
1916         }
1917
1918         mutex_unlock(&watchdog_data_mutex);
1919
1920         return 0;
1921
1922         /* Unregister hwmon device */
1923
1924 exit_devunreg:
1925
1926         hwmon_device_unregister(data->hwmon_dev);
1927
1928         /* Unregister sysfs hooks */
1929
1930 exit_remove:
1931         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1932                 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1933
1934         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1935                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1936
1937         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1938                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1939
1940         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1941                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1942
1943         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1944                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1945
1946         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1947                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1948
1949         i2c_unregister_device(data->lm75[0]);
1950         i2c_unregister_device(data->lm75[1]);
1951 free_mem:
1952         kfree(data);
1953 exit:
1954         return err;
1955 }
1956
1957 static void w83793_update_nonvolatile(struct device *dev)
1958 {
1959         struct i2c_client *client = to_i2c_client(dev);
1960         struct w83793_data *data = i2c_get_clientdata(client);
1961         int i, j;
1962         /*
1963          * They are somewhat "stable" registers, and to update them every time
1964          * takes so much time, it's just not worthy. Update them in a long
1965          * interval to avoid exception.
1966          */
1967         if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1968               || !data->valid))
1969                 return;
1970         /* update voltage limits */
1971         for (i = 1; i < 3; i++) {
1972                 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1973                         data->in[j][i] =
1974                             w83793_read_value(client, W83793_REG_IN[j][i]);
1975                 }
1976                 data->in_low_bits[i] =
1977                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1978         }
1979
1980         for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1981                 /* Update the Fan measured value and limits */
1982                 if (!(data->has_fan & (1 << i)))
1983                         continue;
1984                 data->fan_min[i] =
1985                     w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1986                 data->fan_min[i] |=
1987                     w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1988         }
1989
1990         for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1991                 if (!(data->has_temp & (1 << i)))
1992                         continue;
1993                 data->temp_fan_map[i] =
1994                     w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
1995                 for (j = 1; j < 5; j++) {
1996                         data->temp[i][j] =
1997                             w83793_read_value(client, W83793_REG_TEMP[i][j]);
1998                 }
1999                 data->temp_cruise[i] =
2000                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2001                 for (j = 0; j < 7; j++) {
2002                         data->sf2_pwm[i][j] =
2003                             w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2004                         data->sf2_temp[i][j] =
2005                             w83793_read_value(client,
2006                                               W83793_REG_SF2_TEMP(i, j));
2007                 }
2008         }
2009
2010         for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2011                 data->temp_mode[i] =
2012                     w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2013
2014         for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2015                 data->tolerance[i] =
2016                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2017         }
2018
2019         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2020                 if (!(data->has_pwm & (1 << i)))
2021                         continue;
2022                 data->pwm[i][PWM_NONSTOP] =
2023                     w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2024                 data->pwm[i][PWM_START] =
2025                     w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2026                 data->pwm_stop_time[i] =
2027                     w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2028         }
2029
2030         data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2031         data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2032         data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2033         data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2034         data->temp_critical =
2035             w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2036         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2037
2038         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2039                 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2040
2041         data->last_nonvolatile = jiffies;
2042 }
2043
2044 static struct w83793_data *w83793_update_device(struct device *dev)
2045 {
2046         struct i2c_client *client = to_i2c_client(dev);
2047         struct w83793_data *data = i2c_get_clientdata(client);
2048         int i;
2049
2050         mutex_lock(&data->update_lock);
2051
2052         if (!(time_after(jiffies, data->last_updated + HZ * 2)
2053               || !data->valid))
2054                 goto END;
2055
2056         /* Update the voltages measured value and limits */
2057         for (i = 0; i < ARRAY_SIZE(data->in); i++)
2058                 data->in[i][IN_READ] =
2059                     w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2060
2061         data->in_low_bits[IN_READ] =
2062             w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2063
2064         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2065                 if (!(data->has_fan & (1 << i)))
2066                         continue;
2067                 data->fan[i] =
2068                     w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2069                 data->fan[i] |=
2070                     w83793_read_value(client, W83793_REG_FAN(i) + 1);
2071         }
2072
2073         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2074                 if (!(data->has_temp & (1 << i)))
2075                         continue;
2076                 data->temp[i][TEMP_READ] =
2077                     w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2078         }
2079
2080         data->temp_low_bits =
2081             w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2082
2083         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2084                 if (data->has_pwm & (1 << i))
2085                         data->pwm[i][PWM_DUTY] =
2086                             w83793_read_value(client,
2087                                               W83793_REG_PWM(i, PWM_DUTY));
2088         }
2089
2090         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2091                 data->alarms[i] =
2092                     w83793_read_value(client, W83793_REG_ALARM(i));
2093         if (data->has_vid & 0x01)
2094                 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2095         if (data->has_vid & 0x02)
2096                 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2097         w83793_update_nonvolatile(dev);
2098         data->last_updated = jiffies;
2099         data->valid = 1;
2100
2101 END:
2102         mutex_unlock(&data->update_lock);
2103         return data;
2104 }
2105
2106 /*
2107  * Ignore the possibility that somebody change bank outside the driver
2108  * Must be called with data->update_lock held, except during initialization
2109  */
2110 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2111 {
2112         struct w83793_data *data = i2c_get_clientdata(client);
2113         u8 res = 0xff;
2114         u8 new_bank = reg >> 8;
2115
2116         new_bank |= data->bank & 0xfc;
2117         if (data->bank != new_bank) {
2118                 if (i2c_smbus_write_byte_data
2119                     (client, W83793_REG_BANKSEL, new_bank) >= 0)
2120                         data->bank = new_bank;
2121                 else {
2122                         dev_err(&client->dev,
2123                                 "set bank to %d failed, fall back "
2124                                 "to bank %d, read reg 0x%x error\n",
2125                                 new_bank, data->bank, reg);
2126                         res = 0x0;      /* read 0x0 from the chip */
2127                         goto END;
2128                 }
2129         }
2130         res = i2c_smbus_read_byte_data(client, reg & 0xff);
2131 END:
2132         return res;
2133 }
2134
2135 /* Must be called with data->update_lock held, except during initialization */
2136 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2137 {
2138         struct w83793_data *data = i2c_get_clientdata(client);
2139         int res;
2140         u8 new_bank = reg >> 8;
2141
2142         new_bank |= data->bank & 0xfc;
2143         if (data->bank != new_bank) {
2144                 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2145                                                 new_bank);
2146                 if (res < 0) {
2147                         dev_err(&client->dev,
2148                                 "set bank to %d failed, fall back "
2149                                 "to bank %d, write reg 0x%x error\n",
2150                                 new_bank, data->bank, reg);
2151                         goto END;
2152                 }
2153                 data->bank = new_bank;
2154         }
2155
2156         res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2157 END:
2158         return res;
2159 }
2160
2161 module_i2c_driver(w83793_driver);
2162
2163 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2164 MODULE_DESCRIPTION("w83793 driver");
2165 MODULE_LICENSE("GPL");