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 device *hwmon_dev;
 206         struct mutex update_lock;
 207         char valid;                     /* !=0 if following fields are valid */
 208         unsigned long last_updated;     /* In jiffies */
 209         unsigned long last_nonvolatile; /* In jiffies, last time we update the
 210                                          * nonvolatile registers
 211                                          */
 212
 213         u8 bank;
 214         u8 vrm;
 215         u8 vid[2];
 216         u8 in[10][3];           /* Register value, read/high/low */
 217         u8 in_low_bits[3];      /* Additional resolution for VCore A/B Vtt */
 218
 219         u16 has_fan;            /* Only fan1- fan5 has own pins */
 220         u16 fan[12];            /* Register value combine */
 221         u16 fan_min[12];        /* Register value combine */
 222
 223         s8 temp[6][5];          /* current, crit, crit_hyst,warn, warn_hyst */
 224         u8 temp_low_bits;       /* Additional resolution TD1-TD4 */
 225         u8 temp_mode[2];        /* byte 0: Temp D1-D4 mode each has 2 bits
 226                                  * byte 1: Temp R1,R2 mode, each has 1 bit
 227                                  */
 228         u8 temp_critical;       /* If reached all fan will be at full speed */
 229         u8 temp_fan_map[6];     /* Temp controls which pwm fan, bit field */
 230
 231         u8 has_pwm;
 232         u8 has_temp;
 233         u8 has_vid;
 234         u8 pwm_enable;          /* Register value, each Temp has 1 bit */
 235         u8 pwm_uptime;          /* Register value */
 236         u8 pwm_downtime;        /* Register value */
 237         u8 pwm_default;         /* All fan default pwm, next poweron valid */
 238         u8 pwm[8][3];           /* Register value */
 239         u8 pwm_stop_time[8];
 240         u8 temp_cruise[6];
 241
 242         u8 alarms[5];           /* realtime status registers */
 243         u8 beeps[5];
 244         u8 beep_enable;
 245         u8 tolerance[3];        /* Temp tolerance(Smart Fan I/II) */
 246         u8 sf2_pwm[6][7];       /* Smart FanII: Fan duty cycle */
 247         u8 sf2_temp[6][7];      /* Smart FanII: Temp level point */
 248
 249         /* watchdog */
 250         struct i2c_client *client;
 251         struct mutex watchdog_lock;
 252         struct list_head list; /* member of the watchdog_data_list */
 253         struct kref kref;
 254         struct miscdevice watchdog_miscdev;
 255         unsigned long watchdog_is_open;
 256         char watchdog_expect_close;
 257         char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
 258         unsigned int watchdog_caused_reboot;
 259         int watchdog_timeout; /* watchdog timeout in minutes */
 260 };
 261
 262 /*
 263  * Somewhat ugly :( global data pointer list with all devices, so that
 264  * we can find our device data as when using misc_register. There is no
 265  * other method to get to one's device data from the open file-op and
 266  * for usage in the reboot notifier callback.
 267  */
 268 static LIST_HEAD(watchdog_data_list);
 269
 270 /* Note this lock not only protect list access, but also data.kref access */
 271 static DEFINE_MUTEX(watchdog_data_mutex);
 272
 273 /*
 274  * Release our data struct when we're detached from the i2c client *and* all
 275  * references to our watchdog device are released
 276  */
 277 static void w83793_release_resources(struct kref *ref)
 278 {
 279         struct w83793_data *data = container_of(ref, struct w83793_data, kref);
 280         kfree(data);
 281 }
 282
 283 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
 284 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
 285 static int w83793_probe(struct i2c_client *client);
 286 static int w83793_detect(struct i2c_client *client,
 287                          struct i2c_board_info *info);
 288 static int w83793_remove(struct i2c_client *client);
 289 static void w83793_init_client(struct i2c_client *client);
 290 static void w83793_update_nonvolatile(struct device *dev);
 291 static struct w83793_data *w83793_update_device(struct device *dev);
 292
 293 static const struct i2c_device_id w83793_id[] = {
 294         { "w83793", 0 },
 295         { }
 296 };
 297 MODULE_DEVICE_TABLE(i2c, w83793_id);
 298
 299 static struct i2c_driver w83793_driver = {
 300         .class          = I2C_CLASS_HWMON,
 301         .driver = {
 302                    .name = "w83793",
 303         },
 304         .probe_new      = w83793_probe,
 305         .remove         = w83793_remove,
 306         .id_table       = w83793_id,
 307         .detect         = w83793_detect,
 308         .address_list   = normal_i2c,
 309 };
 310
 311 static ssize_t
 312 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 313 {
 314         struct w83793_data *data = dev_get_drvdata(dev);
 315         return sprintf(buf, "%d\n", data->vrm);
 316 }
 317
 318 static ssize_t
 319 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 320 {
 321         struct w83793_data *data = w83793_update_device(dev);
 322         struct sensor_device_attribute_2 *sensor_attr =
 323             to_sensor_dev_attr_2(attr);
 324         int index = sensor_attr->index;
 325
 326         return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
 327 }
 328
 329 static ssize_t
 330 vrm_store(struct device *dev, struct device_attribute *attr,
 331           const char *buf, size_t count)
 332 {
 333         struct w83793_data *data = dev_get_drvdata(dev);
 334         unsigned long val;
 335         int err;
 336
 337         err = kstrtoul(buf, 10, &val);
 338         if (err)
 339                 return err;
 340
 341         if (val > 255)
 342                 return -EINVAL;
 343
 344         data->vrm = val;
 345         return count;
 346 }
 347
 348 #define ALARM_STATUS                    0
 349 #define BEEP_ENABLE                     1
 350 static ssize_t
 351 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 352 {
 353         struct w83793_data *data = w83793_update_device(dev);
 354         struct sensor_device_attribute_2 *sensor_attr =
 355             to_sensor_dev_attr_2(attr);
 356         int nr = sensor_attr->nr;
 357         int index = sensor_attr->index >> 3;
 358         int bit = sensor_attr->index & 0x07;
 359         u8 val;
 360
 361         if (nr == ALARM_STATUS) {
 362                 val = (data->alarms[index] >> (bit)) & 1;
 363         } else {                /* BEEP_ENABLE */
 364                 val = (data->beeps[index] >> (bit)) & 1;
 365         }
 366
 367         return sprintf(buf, "%u\n", val);
 368 }
 369
 370 static ssize_t
 371 store_beep(struct device *dev, struct device_attribute *attr,
 372            const char *buf, size_t count)
 373 {
 374         struct i2c_client *client = to_i2c_client(dev);
 375         struct w83793_data *data = i2c_get_clientdata(client);
 376         struct sensor_device_attribute_2 *sensor_attr =
 377             to_sensor_dev_attr_2(attr);
 378         int index = sensor_attr->index >> 3;
 379         int shift = sensor_attr->index & 0x07;
 380         u8 beep_bit = 1 << shift;
 381         unsigned long val;
 382         int err;
 383
 384         err = kstrtoul(buf, 10, &val);
 385         if (err)
 386                 return err;
 387
 388         if (val > 1)
 389                 return -EINVAL;
 390
 391         mutex_lock(&data->update_lock);
 392         data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
 393         data->beeps[index] &= ~beep_bit;
 394         data->beeps[index] |= val << shift;
 395         w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
 396         mutex_unlock(&data->update_lock);
 397
 398         return count;
 399 }
 400
 401 static ssize_t
 402 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
 403 {
 404         struct w83793_data *data = w83793_update_device(dev);
 405         return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
 406 }
 407
 408 static ssize_t
 409 store_beep_enable(struct device *dev, struct device_attribute *attr,
 410                   const char *buf, size_t count)
 411 {
 412         struct i2c_client *client = to_i2c_client(dev);
 413         struct w83793_data *data = i2c_get_clientdata(client);
 414         unsigned long val;
 415         int err;
 416
 417         err = kstrtoul(buf, 10, &val);
 418         if (err)
 419                 return err;
 420
 421         if (val > 1)
 422                 return -EINVAL;
 423
 424         mutex_lock(&data->update_lock);
 425         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
 426                             & 0xfd;
 427         data->beep_enable |= val << 1;
 428         w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
 429         mutex_unlock(&data->update_lock);
 430
 431         return count;
 432 }
 433
 434 /* Write 0 to clear chassis alarm */
 435 static ssize_t
 436 store_chassis_clear(struct device *dev,
 437                     struct device_attribute *attr, const char *buf,
 438                     size_t count)
 439 {
 440         struct i2c_client *client = to_i2c_client(dev);
 441         struct w83793_data *data = i2c_get_clientdata(client);
 442         unsigned long val;
 443         u8 reg;
 444         int err;
 445
 446         err = kstrtoul(buf, 10, &val);
 447         if (err)
 448                 return err;
 449         if (val)
 450                 return -EINVAL;
 451
 452         mutex_lock(&data->update_lock);
 453         reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 454         w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
 455         data->valid = 0;                /* Force cache refresh */
 456         mutex_unlock(&data->update_lock);
 457         return count;
 458 }
 459
 460 #define FAN_INPUT                       0
 461 #define FAN_MIN                         1
 462 static ssize_t
 463 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 464 {
 465         struct sensor_device_attribute_2 *sensor_attr =
 466             to_sensor_dev_attr_2(attr);
 467         int nr = sensor_attr->nr;
 468         int index = sensor_attr->index;
 469         struct w83793_data *data = w83793_update_device(dev);
 470         u16 val;
 471
 472         if (nr == FAN_INPUT)
 473                 val = data->fan[index] & 0x0fff;
 474         else
 475                 val = data->fan_min[index] & 0x0fff;
 476
 477         return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
 478 }
 479
 480 static ssize_t
 481 store_fan_min(struct device *dev, struct device_attribute *attr,
 482               const char *buf, size_t count)
 483 {
 484         struct sensor_device_attribute_2 *sensor_attr =
 485             to_sensor_dev_attr_2(attr);
 486         int index = sensor_attr->index;
 487         struct i2c_client *client = to_i2c_client(dev);
 488         struct w83793_data *data = i2c_get_clientdata(client);
 489         unsigned long val;
 490         int err;
 491
 492         err = kstrtoul(buf, 10, &val);
 493         if (err)
 494                 return err;
 495         val = FAN_TO_REG(val);
 496
 497         mutex_lock(&data->update_lock);
 498         data->fan_min[index] = val;
 499         w83793_write_value(client, W83793_REG_FAN_MIN(index),
 500                            (val >> 8) & 0xff);
 501         w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
 502         mutex_unlock(&data->update_lock);
 503
 504         return count;
 505 }
 506
 507 static ssize_t
 508 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 509 {
 510         struct sensor_device_attribute_2 *sensor_attr =
 511             to_sensor_dev_attr_2(attr);
 512         struct w83793_data *data = w83793_update_device(dev);
 513         u16 val;
 514         int nr = sensor_attr->nr;
 515         int index = sensor_attr->index;
 516
 517         if (nr == PWM_STOP_TIME)
 518                 val = TIME_FROM_REG(data->pwm_stop_time[index]);
 519         else
 520                 val = (data->pwm[index][nr] & 0x3f) << 2;
 521
 522         return sprintf(buf, "%d\n", val);
 523 }
 524
 525 static ssize_t
 526 store_pwm(struct device *dev, struct device_attribute *attr,
 527           const char *buf, size_t count)
 528 {
 529         struct i2c_client *client = to_i2c_client(dev);
 530         struct w83793_data *data = i2c_get_clientdata(client);
 531         struct sensor_device_attribute_2 *sensor_attr =
 532             to_sensor_dev_attr_2(attr);
 533         int nr = sensor_attr->nr;
 534         int index = sensor_attr->index;
 535         unsigned long val;
 536         int err;
 537
 538         err = kstrtoul(buf, 10, &val);
 539         if (err)
 540                 return err;
 541
 542         mutex_lock(&data->update_lock);
 543         if (nr == PWM_STOP_TIME) {
 544                 val = TIME_TO_REG(val);
 545                 data->pwm_stop_time[index] = val;
 546                 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
 547                                    val);
 548         } else {
 549                 val = clamp_val(val, 0, 0xff) >> 2;
 550                 data->pwm[index][nr] =
 551                     w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
 552                 data->pwm[index][nr] |= val;
 553                 w83793_write_value(client, W83793_REG_PWM(index, nr),
 554                                                         data->pwm[index][nr]);
 555         }
 556
 557         mutex_unlock(&data->update_lock);
 558         return count;
 559 }
 560
 561 static ssize_t
 562 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 563 {
 564         struct sensor_device_attribute_2 *sensor_attr =
 565             to_sensor_dev_attr_2(attr);
 566         int nr = sensor_attr->nr;
 567         int index = sensor_attr->index;
 568         struct w83793_data *data = w83793_update_device(dev);
 569         long temp = TEMP_FROM_REG(data->temp[index][nr]);
 570
 571         if (nr == TEMP_READ && index < 4) {     /* Only TD1-TD4 have low bits */
 572                 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
 573                 temp += temp > 0 ? low : -low;
 574         }
 575         return sprintf(buf, "%ld\n", temp);
 576 }
 577
 578 static ssize_t
 579 store_temp(struct device *dev, struct device_attribute *attr,
 580            const char *buf, size_t count)
 581 {
 582         struct sensor_device_attribute_2 *sensor_attr =
 583             to_sensor_dev_attr_2(attr);
 584         int nr = sensor_attr->nr;
 585         int index = sensor_attr->index;
 586         struct i2c_client *client = to_i2c_client(dev);
 587         struct w83793_data *data = i2c_get_clientdata(client);
 588         long tmp;
 589         int err;
 590
 591         err = kstrtol(buf, 10, &tmp);
 592         if (err)
 593                 return err;
 594
 595         mutex_lock(&data->update_lock);
 596         data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
 597         w83793_write_value(client, W83793_REG_TEMP[index][nr],
 598                            data->temp[index][nr]);
 599         mutex_unlock(&data->update_lock);
 600         return count;
 601 }
 602
 603 /*
 604  * TD1-TD4
 605  * each has 4 mode:(2 bits)
 606  * 0:   Stop monitor
 607  * 1:   Use internal temp sensor(default)
 608  * 2:   Reserved
 609  * 3:   Use sensor in Intel CPU and get result by PECI
 610  *
 611  * TR1-TR2
 612  * each has 2 mode:(1 bit)
 613  * 0:   Disable temp sensor monitor
 614  * 1:   To enable temp sensors monitor
 615  */
 616
 617 /* 0 disable, 6 PECI */
 618 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
 619
 620 static ssize_t
 621 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
 622 {
 623         struct w83793_data *data = w83793_update_device(dev);
 624         struct sensor_device_attribute_2 *sensor_attr =
 625             to_sensor_dev_attr_2(attr);
 626         int index = sensor_attr->index;
 627         u8 mask = (index < 4) ? 0x03 : 0x01;
 628         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 629         u8 tmp;
 630         index = (index < 4) ? 0 : 1;
 631
 632         tmp = (data->temp_mode[index] >> shift) & mask;
 633
 634         /* for the internal sensor, found out if diode or thermistor */
 635         if (tmp == 1)
 636                 tmp = index == 0 ? 3 : 4;
 637         else
 638                 tmp = TO_TEMP_MODE[tmp];
 639
 640         return sprintf(buf, "%d\n", tmp);
 641 }
 642
 643 static ssize_t
 644 store_temp_mode(struct device *dev, struct device_attribute *attr,
 645                 const char *buf, size_t count)
 646 {
 647         struct i2c_client *client = to_i2c_client(dev);
 648         struct w83793_data *data = i2c_get_clientdata(client);
 649         struct sensor_device_attribute_2 *sensor_attr =
 650             to_sensor_dev_attr_2(attr);
 651         int index = sensor_attr->index;
 652         u8 mask = (index < 4) ? 0x03 : 0x01;
 653         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 654         unsigned long val;
 655         int err;
 656
 657         err = kstrtoul(buf, 10, &val);
 658         if (err)
 659                 return err;
 660
 661         /* transform the sysfs interface values into table above */
 662         if ((val == 6) && (index < 4)) {
 663                 val -= 3;
 664         } else if ((val == 3 && index < 4)
 665                 || (val == 4 && index >= 4)) {
 666                 /* transform diode or thermistor into internal enable */
 667                 val = !!val;
 668         } else {
 669                 return -EINVAL;
 670         }
 671
 672         index = (index < 4) ? 0 : 1;
 673         mutex_lock(&data->update_lock);
 674         data->temp_mode[index] =
 675             w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
 676         data->temp_mode[index] &= ~(mask << shift);
 677         data->temp_mode[index] |= val << shift;
 678         w83793_write_value(client, W83793_REG_TEMP_MODE[index],
 679                                                         data->temp_mode[index]);
 680         mutex_unlock(&data->update_lock);
 681
 682         return count;
 683 }
 684
 685 #define SETUP_PWM_DEFAULT               0
 686 #define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
 687 #define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
 688 #define SETUP_TEMP_CRITICAL             3
 689 static ssize_t
 690 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
 691 {
 692         struct sensor_device_attribute_2 *sensor_attr =
 693             to_sensor_dev_attr_2(attr);
 694         int nr = sensor_attr->nr;
 695         struct w83793_data *data = w83793_update_device(dev);
 696         u32 val = 0;
 697
 698         if (nr == SETUP_PWM_DEFAULT)
 699                 val = (data->pwm_default & 0x3f) << 2;
 700         else if (nr == SETUP_PWM_UPTIME)
 701                 val = TIME_FROM_REG(data->pwm_uptime);
 702         else if (nr == SETUP_PWM_DOWNTIME)
 703                 val = TIME_FROM_REG(data->pwm_downtime);
 704         else if (nr == SETUP_TEMP_CRITICAL)
 705                 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
 706
 707         return sprintf(buf, "%d\n", val);
 708 }
 709
 710 static ssize_t
 711 store_sf_setup(struct device *dev, struct device_attribute *attr,
 712                const char *buf, size_t count)
 713 {
 714         struct sensor_device_attribute_2 *sensor_attr =
 715             to_sensor_dev_attr_2(attr);
 716         int nr = sensor_attr->nr;
 717         struct i2c_client *client = to_i2c_client(dev);
 718         struct w83793_data *data = i2c_get_clientdata(client);
 719         long val;
 720         int err;
 721
 722         err = kstrtol(buf, 10, &val);
 723         if (err)
 724                 return err;
 725
 726         mutex_lock(&data->update_lock);
 727         if (nr == SETUP_PWM_DEFAULT) {
 728                 data->pwm_default =
 729                     w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
 730                 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
 731                 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
 732                                                         data->pwm_default);
 733         } else if (nr == SETUP_PWM_UPTIME) {
 734                 data->pwm_uptime = TIME_TO_REG(val);
 735                 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
 736                 w83793_write_value(client, W83793_REG_PWM_UPTIME,
 737                                                         data->pwm_uptime);
 738         } else if (nr == SETUP_PWM_DOWNTIME) {
 739                 data->pwm_downtime = TIME_TO_REG(val);
 740                 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
 741                 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
 742                                                         data->pwm_downtime);
 743         } else {                /* SETUP_TEMP_CRITICAL */
 744                 data->temp_critical =
 745                     w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
 746                 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
 747                 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
 748                                                         data->temp_critical);
 749         }
 750
 751         mutex_unlock(&data->update_lock);
 752         return count;
 753 }
 754
 755 /*
 756  * Temp SmartFan control
 757  * TEMP_FAN_MAP
 758  * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
 759  * It's possible two or more temp channels control the same fan, w83793
 760  * always prefers to pick the most critical request and applies it to
 761  * the related Fan.
 762  * It's possible one fan is not in any mapping of 6 temp channels, this
 763  * means the fan is manual mode
 764  *
 765  * TEMP_PWM_ENABLE
 766  * Each temp channel has its own SmartFan mode, and temp channel
 767  * control fans that are set by TEMP_FAN_MAP
 768  * 0:   SmartFanII mode
 769  * 1:   Thermal Cruise Mode
 770  *
 771  * TEMP_CRUISE
 772  * Target temperature in thermal cruise mode, w83793 will try to turn
 773  * fan speed to keep the temperature of target device around this
 774  * temperature.
 775  *
 776  * TEMP_TOLERANCE
 777  * If Temp higher or lower than target with this tolerance, w83793
 778  * will take actions to speed up or slow down the fan to keep the
 779  * temperature within the tolerance range.
 780  */
 781
 782 #define TEMP_FAN_MAP                    0
 783 #define TEMP_PWM_ENABLE                 1
 784 #define TEMP_CRUISE                     2
 785 #define TEMP_TOLERANCE                  3
 786 static ssize_t
 787 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
 788 {
 789         struct sensor_device_attribute_2 *sensor_attr =
 790             to_sensor_dev_attr_2(attr);
 791         int nr = sensor_attr->nr;
 792         int index = sensor_attr->index;
 793         struct w83793_data *data = w83793_update_device(dev);
 794         u32 val;
 795
 796         if (nr == TEMP_FAN_MAP) {
 797                 val = data->temp_fan_map[index];
 798         } else if (nr == TEMP_PWM_ENABLE) {
 799                 /* +2 to transform into 2 and 3 to conform with sysfs intf */
 800                 val = ((data->pwm_enable >> index) & 0x01) + 2;
 801         } else if (nr == TEMP_CRUISE) {
 802                 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
 803         } else {                /* TEMP_TOLERANCE */
 804                 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
 805                 val = TEMP_FROM_REG(val & 0x0f);
 806         }
 807         return sprintf(buf, "%d\n", val);
 808 }
 809
 810 static ssize_t
 811 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
 812               const char *buf, size_t count)
 813 {
 814         struct sensor_device_attribute_2 *sensor_attr =
 815             to_sensor_dev_attr_2(attr);
 816         int nr = sensor_attr->nr;
 817         int index = sensor_attr->index;
 818         struct i2c_client *client = to_i2c_client(dev);
 819         struct w83793_data *data = i2c_get_clientdata(client);
 820         long val;
 821         int err;
 822
 823         err = kstrtol(buf, 10, &val);
 824         if (err)
 825                 return err;
 826
 827         mutex_lock(&data->update_lock);
 828         if (nr == TEMP_FAN_MAP) {
 829                 val = clamp_val(val, 0, 255);
 830                 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
 831                 data->temp_fan_map[index] = val;
 832         } else if (nr == TEMP_PWM_ENABLE) {
 833                 if (val == 2 || val == 3) {
 834                         data->pwm_enable =
 835                             w83793_read_value(client, W83793_REG_PWM_ENABLE);
 836                         if (val - 2)
 837                                 data->pwm_enable |= 1 << index;
 838                         else
 839                                 data->pwm_enable &= ~(1 << index);
 840                         w83793_write_value(client, W83793_REG_PWM_ENABLE,
 841                                                         data->pwm_enable);
 842                 } else {
 843                         mutex_unlock(&data->update_lock);
 844                         return -EINVAL;
 845                 }
 846         } else if (nr == TEMP_CRUISE) {
 847                 data->temp_cruise[index] =
 848                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
 849                 data->temp_cruise[index] &= 0x80;
 850                 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
 851
 852                 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
 853                                                 data->temp_cruise[index]);
 854         } else {                /* TEMP_TOLERANCE */
 855                 int i = index >> 1;
 856                 u8 shift = (index & 0x01) ? 4 : 0;
 857                 data->tolerance[i] =
 858                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
 859
 860                 data->tolerance[i] &= ~(0x0f << shift);
 861                 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
 862                 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
 863                                                         data->tolerance[i]);
 864         }
 865
 866         mutex_unlock(&data->update_lock);
 867         return count;
 868 }
 869
 870 static ssize_t
 871 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 872 {
 873         struct sensor_device_attribute_2 *sensor_attr =
 874             to_sensor_dev_attr_2(attr);
 875         int nr = sensor_attr->nr;
 876         int index = sensor_attr->index;
 877         struct w83793_data *data = w83793_update_device(dev);
 878
 879         return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
 880 }
 881
 882 static ssize_t
 883 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
 884               const char *buf, size_t count)
 885 {
 886         struct i2c_client *client = to_i2c_client(dev);
 887         struct w83793_data *data = i2c_get_clientdata(client);
 888         struct sensor_device_attribute_2 *sensor_attr =
 889             to_sensor_dev_attr_2(attr);
 890         int nr = sensor_attr->nr;
 891         int index = sensor_attr->index;
 892         unsigned long val;
 893         int err;
 894
 895         err = kstrtoul(buf, 10, &val);
 896         if (err)
 897                 return err;
 898         val = clamp_val(val, 0, 0xff) >> 2;
 899
 900         mutex_lock(&data->update_lock);
 901         data->sf2_pwm[index][nr] =
 902             w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
 903         data->sf2_pwm[index][nr] |= val;
 904         w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
 905                                                 data->sf2_pwm[index][nr]);
 906         mutex_unlock(&data->update_lock);
 907         return count;
 908 }
 909
 910 static ssize_t
 911 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
 912 {
 913         struct sensor_device_attribute_2 *sensor_attr =
 914             to_sensor_dev_attr_2(attr);
 915         int nr = sensor_attr->nr;
 916         int index = sensor_attr->index;
 917         struct w83793_data *data = w83793_update_device(dev);
 918
 919         return sprintf(buf, "%ld\n",
 920                        TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
 921 }
 922
 923 static ssize_t
 924 store_sf2_temp(struct device *dev, struct device_attribute *attr,
 925                const char *buf, size_t count)
 926 {
 927         struct i2c_client *client = to_i2c_client(dev);
 928         struct w83793_data *data = i2c_get_clientdata(client);
 929         struct sensor_device_attribute_2 *sensor_attr =
 930             to_sensor_dev_attr_2(attr);
 931         int nr = sensor_attr->nr;
 932         int index = sensor_attr->index;
 933         long val;
 934         int err;
 935
 936         err = kstrtol(buf, 10, &val);
 937         if (err)
 938                 return err;
 939         val = TEMP_TO_REG(val, 0, 0x7f);
 940
 941         mutex_lock(&data->update_lock);
 942         data->sf2_temp[index][nr] =
 943             w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
 944         data->sf2_temp[index][nr] |= val;
 945         w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
 946                                              data->sf2_temp[index][nr]);
 947         mutex_unlock(&data->update_lock);
 948         return count;
 949 }
 950
 951 /* only Vcore A/B and Vtt have additional 2 bits precision */
 952 static ssize_t
 953 show_in(struct device *dev, struct device_attribute *attr, char *buf)
 954 {
 955         struct sensor_device_attribute_2 *sensor_attr =
 956             to_sensor_dev_attr_2(attr);
 957         int nr = sensor_attr->nr;
 958         int index = sensor_attr->index;
 959         struct w83793_data *data = w83793_update_device(dev);
 960         u16 val = data->in[index][nr];
 961
 962         if (index < 3) {
 963                 val <<= 2;
 964                 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
 965         }
 966         /* voltage inputs 5VDD and 5VSB needs 150mV offset */
 967         val = val * scale_in[index] + scale_in_add[index];
 968         return sprintf(buf, "%d\n", val);
 969 }
 970
 971 static ssize_t
 972 store_in(struct device *dev, struct device_attribute *attr,
 973          const char *buf, size_t count)
 974 {
 975         struct sensor_device_attribute_2 *sensor_attr =
 976             to_sensor_dev_attr_2(attr);
 977         int nr = sensor_attr->nr;
 978         int index = sensor_attr->index;
 979         struct i2c_client *client = to_i2c_client(dev);
 980         struct w83793_data *data = i2c_get_clientdata(client);
 981         unsigned long val;
 982         int err;
 983
 984         err = kstrtoul(buf, 10, &val);
 985         if (err)
 986                 return err;
 987         val = (val + scale_in[index] / 2) / scale_in[index];
 988
 989         mutex_lock(&data->update_lock);
 990         if (index > 2) {
 991                 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
 992                 if (nr == 1 || nr == 2)
 993                         val -= scale_in_add[index] / scale_in[index];
 994                 val = clamp_val(val, 0, 255);
 995         } else {
 996                 val = clamp_val(val, 0, 0x3FF);
 997                 data->in_low_bits[nr] =
 998                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
 999                 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1000                 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1001                 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1002                                                      data->in_low_bits[nr]);
1003                 val >>= 2;
1004         }
1005         data->in[index][nr] = val;
1006         w83793_write_value(client, W83793_REG_IN[index][nr],
1007                                                         data->in[index][nr]);
1008         mutex_unlock(&data->update_lock);
1009         return count;
1010 }
1011
1012 #define NOT_USED                        -1
1013
1014 #define SENSOR_ATTR_IN(index)                                           \
1015         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1016                 IN_READ, index),                                        \
1017         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1018                 store_in, IN_MAX, index),                               \
1019         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1020                 store_in, IN_LOW, index),                               \
1021         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1022                 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
1023         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1024                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1025                 index + ((index > 2) ? 1 : 0))
1026
1027 #define SENSOR_ATTR_FAN(index)                                          \
1028         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1029                 NULL, ALARM_STATUS, index + 17),                        \
1030         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1031                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
1032         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1033                 NULL, FAN_INPUT, index - 1),                            \
1034         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1035                 show_fan, store_fan_min, FAN_MIN, index - 1)
1036
1037 #define SENSOR_ATTR_PWM(index)                                          \
1038         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1039                 store_pwm, PWM_DUTY, index - 1),                        \
1040         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1041                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1042         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1043                 show_pwm, store_pwm, PWM_START, index - 1),             \
1044         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1045                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1046
1047 #define SENSOR_ATTR_TEMP(index)                                         \
1048         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1049                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1050         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1051                 NULL, TEMP_READ, index - 1),                            \
1052         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1053                 store_temp, TEMP_CRIT, index - 1),                      \
1054         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1055                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1056         SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1057                 store_temp, TEMP_WARN, index - 1),                      \
1058         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1059                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1060         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1061                 show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1062         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1063                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1064         SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1065                 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1066                 TEMP_FAN_MAP, index - 1),                               \
1067         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1068                 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1069                 index - 1),                                             \
1070         SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1071                 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1072         SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1073                 store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1074         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1075                 show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1076         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1077                 show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1078         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1079                 show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1080         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1081                 show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1082         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1083                 show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1084         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1085                 show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1086         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1087                 show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1088         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1089                 show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1090         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1091                 show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1092         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1093                 show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1094         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1095                 show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1096         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1097                 show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1098         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1099                 show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1100         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1101                 show_sf2_temp, store_sf2_temp, 6, index - 1)
1102
1103 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1104         SENSOR_ATTR_IN(0),
1105         SENSOR_ATTR_IN(1),
1106         SENSOR_ATTR_IN(2),
1107         SENSOR_ATTR_IN(3),
1108         SENSOR_ATTR_IN(4),
1109         SENSOR_ATTR_IN(5),
1110         SENSOR_ATTR_IN(6),
1111         SENSOR_ATTR_IN(7),
1112         SENSOR_ATTR_IN(8),
1113         SENSOR_ATTR_IN(9),
1114         SENSOR_ATTR_FAN(1),
1115         SENSOR_ATTR_FAN(2),
1116         SENSOR_ATTR_FAN(3),
1117         SENSOR_ATTR_FAN(4),
1118         SENSOR_ATTR_FAN(5),
1119         SENSOR_ATTR_PWM(1),
1120         SENSOR_ATTR_PWM(2),
1121         SENSOR_ATTR_PWM(3),
1122 };
1123
1124 static struct sensor_device_attribute_2 w83793_temp[] = {
1125         SENSOR_ATTR_TEMP(1),
1126         SENSOR_ATTR_TEMP(2),
1127         SENSOR_ATTR_TEMP(3),
1128         SENSOR_ATTR_TEMP(4),
1129         SENSOR_ATTR_TEMP(5),
1130         SENSOR_ATTR_TEMP(6),
1131 };
1132
1133 /* Fan6-Fan12 */
1134 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1135         SENSOR_ATTR_FAN(6),
1136         SENSOR_ATTR_FAN(7),
1137         SENSOR_ATTR_FAN(8),
1138         SENSOR_ATTR_FAN(9),
1139         SENSOR_ATTR_FAN(10),
1140         SENSOR_ATTR_FAN(11),
1141         SENSOR_ATTR_FAN(12),
1142 };
1143
1144 /* Pwm4-Pwm8 */
1145 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1146         SENSOR_ATTR_PWM(4),
1147         SENSOR_ATTR_PWM(5),
1148         SENSOR_ATTR_PWM(6),
1149         SENSOR_ATTR_PWM(7),
1150         SENSOR_ATTR_PWM(8),
1151 };
1152
1153 static struct sensor_device_attribute_2 w83793_vid[] = {
1154         SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1155         SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1156 };
1157 static DEVICE_ATTR_RW(vrm);
1158
1159 static struct sensor_device_attribute_2 sda_single_files[] = {
1160         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1161                       store_chassis_clear, ALARM_STATUS, 30),
1162         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1163                       store_beep_enable, NOT_USED, NOT_USED),
1164         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1165                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1166         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1167                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1168         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1169                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1170         SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1171                       store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1172 };
1173
1174 static void w83793_init_client(struct i2c_client *client)
1175 {
1176         if (reset)
1177                 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1178
1179         /* Start monitoring */
1180         w83793_write_value(client, W83793_REG_CONFIG,
1181                            w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1182 }
1183
1184 /*
1185  * Watchdog routines
1186  */
1187
1188 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1189 {
1190         unsigned int mtimeout;
1191         int ret;
1192
1193         mtimeout = DIV_ROUND_UP(timeout, 60);
1194
1195         if (mtimeout > 255)
1196                 return -EINVAL;
1197
1198         mutex_lock(&data->watchdog_lock);
1199         if (!data->client) {
1200                 ret = -ENODEV;
1201                 goto leave;
1202         }
1203
1204         data->watchdog_timeout = mtimeout;
1205
1206         /* Set Timeout value (in Minutes) */
1207         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1208                            data->watchdog_timeout);
1209
1210         ret = mtimeout * 60;
1211
1212 leave:
1213         mutex_unlock(&data->watchdog_lock);
1214         return ret;
1215 }
1216
1217 static int watchdog_get_timeout(struct w83793_data *data)
1218 {
1219         int timeout;
1220
1221         mutex_lock(&data->watchdog_lock);
1222         timeout = data->watchdog_timeout * 60;
1223         mutex_unlock(&data->watchdog_lock);
1224
1225         return timeout;
1226 }
1227
1228 static int watchdog_trigger(struct w83793_data *data)
1229 {
1230         int ret = 0;
1231
1232         mutex_lock(&data->watchdog_lock);
1233         if (!data->client) {
1234                 ret = -ENODEV;
1235                 goto leave;
1236         }
1237
1238         /* Set Timeout value (in Minutes) */
1239         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1240                            data->watchdog_timeout);
1241
1242 leave:
1243         mutex_unlock(&data->watchdog_lock);
1244         return ret;
1245 }
1246
1247 static int watchdog_enable(struct w83793_data *data)
1248 {
1249         int ret = 0;
1250
1251         mutex_lock(&data->watchdog_lock);
1252         if (!data->client) {
1253                 ret = -ENODEV;
1254                 goto leave;
1255         }
1256
1257         /* Set initial timeout */
1258         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1259                            data->watchdog_timeout);
1260
1261         /* Enable Soft Watchdog */
1262         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1263
1264 leave:
1265         mutex_unlock(&data->watchdog_lock);
1266         return ret;
1267 }
1268
1269 static int watchdog_disable(struct w83793_data *data)
1270 {
1271         int ret = 0;
1272
1273         mutex_lock(&data->watchdog_lock);
1274         if (!data->client) {
1275                 ret = -ENODEV;
1276                 goto leave;
1277         }
1278
1279         /* Disable Soft Watchdog */
1280         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1281
1282 leave:
1283         mutex_unlock(&data->watchdog_lock);
1284         return ret;
1285 }
1286
1287 static int watchdog_open(struct inode *inode, struct file *filp)
1288 {
1289         struct w83793_data *pos, *data = NULL;
1290         int watchdog_is_open;
1291
1292         /*
1293          * We get called from drivers/char/misc.c with misc_mtx hold, and we
1294          * call misc_register() from  w83793_probe() with watchdog_data_mutex
1295          * hold, as misc_register() takes the misc_mtx lock, this is a possible
1296          * deadlock, so we use mutex_trylock here.
1297          */
1298         if (!mutex_trylock(&watchdog_data_mutex))
1299                 return -ERESTARTSYS;
1300         list_for_each_entry(pos, &watchdog_data_list, list) {
1301                 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1302                         data = pos;
1303                         break;
1304                 }
1305         }
1306
1307         /* Check, if device is already open */
1308         watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1309
1310         /*
1311          * Increase data reference counter (if not already done).
1312          * Note we can never not have found data, so we don't check for this
1313          */
1314         if (!watchdog_is_open)
1315                 kref_get(&data->kref);
1316
1317         mutex_unlock(&watchdog_data_mutex);
1318
1319         /* Check, if device is already open and possibly issue error */
1320         if (watchdog_is_open)
1321                 return -EBUSY;
1322
1323         /* Enable Soft Watchdog */
1324         watchdog_enable(data);
1325
1326         /* Store pointer to data into filp's private data */
1327         filp->private_data = data;
1328
1329         return stream_open(inode, filp);
1330 }
1331
1332 static int watchdog_close(struct inode *inode, struct file *filp)
1333 {
1334         struct w83793_data *data = filp->private_data;
1335
1336         if (data->watchdog_expect_close) {
1337                 watchdog_disable(data);
1338                 data->watchdog_expect_close = 0;
1339         } else {
1340                 watchdog_trigger(data);
1341                 dev_crit(&data->client->dev,
1342                         "unexpected close, not stopping watchdog!\n");
1343         }
1344
1345         clear_bit(0, &data->watchdog_is_open);
1346
1347         /* Decrease data reference counter */
1348         mutex_lock(&watchdog_data_mutex);
1349         kref_put(&data->kref, w83793_release_resources);
1350         mutex_unlock(&watchdog_data_mutex);
1351
1352         return 0;
1353 }
1354
1355 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1356         size_t count, loff_t *offset)
1357 {
1358         ssize_t ret;
1359         struct w83793_data *data = filp->private_data;
1360
1361         if (count) {
1362                 if (!nowayout) {
1363                         size_t i;
1364
1365                         /* Clear it in case it was set with a previous write */
1366                         data->watchdog_expect_close = 0;
1367
1368                         for (i = 0; i != count; i++) {
1369                                 char c;
1370                                 if (get_user(c, buf + i))
1371                                         return -EFAULT;
1372                                 if (c == 'V')
1373                                         data->watchdog_expect_close = 1;
1374                         }
1375                 }
1376                 ret = watchdog_trigger(data);
1377                 if (ret < 0)
1378                         return ret;
1379         }
1380         return count;
1381 }
1382
1383 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1384                            unsigned long arg)
1385 {
1386         struct watchdog_info ident = {
1387                 .options = WDIOF_KEEPALIVEPING |
1388                            WDIOF_SETTIMEOUT |
1389                            WDIOF_CARDRESET,
1390                 .identity = "w83793 watchdog"
1391         };
1392
1393         int val, ret = 0;
1394         struct w83793_data *data = filp->private_data;
1395
1396         switch (cmd) {
1397         case WDIOC_GETSUPPORT:
1398                 if (!nowayout)
1399                         ident.options |= WDIOF_MAGICCLOSE;
1400                 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1401                         ret = -EFAULT;
1402                 break;
1403
1404         case WDIOC_GETSTATUS:
1405                 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1406                 ret = put_user(val, (int __user *)arg);
1407                 break;
1408
1409         case WDIOC_GETBOOTSTATUS:
1410                 ret = put_user(0, (int __user *)arg);
1411                 break;
1412
1413         case WDIOC_KEEPALIVE:
1414                 ret = watchdog_trigger(data);
1415                 break;
1416
1417         case WDIOC_GETTIMEOUT:
1418                 val = watchdog_get_timeout(data);
1419                 ret = put_user(val, (int __user *)arg);
1420                 break;
1421
1422         case WDIOC_SETTIMEOUT:
1423                 if (get_user(val, (int __user *)arg)) {
1424                         ret = -EFAULT;
1425                         break;
1426                 }
1427                 ret = watchdog_set_timeout(data, val);
1428                 if (ret > 0)
1429                         ret = put_user(ret, (int __user *)arg);
1430                 break;
1431
1432         case WDIOC_SETOPTIONS:
1433                 if (get_user(val, (int __user *)arg)) {
1434                         ret = -EFAULT;
1435                         break;
1436                 }
1437
1438                 if (val & WDIOS_DISABLECARD)
1439                         ret = watchdog_disable(data);
1440                 else if (val & WDIOS_ENABLECARD)
1441                         ret = watchdog_enable(data);
1442                 else
1443                         ret = -EINVAL;
1444
1445                 break;
1446         default:
1447                 ret = -ENOTTY;
1448         }
1449         return ret;
1450 }
1451
1452 static const struct file_operations watchdog_fops = {
1453         .owner = THIS_MODULE,
1454         .llseek = no_llseek,
1455         .open = watchdog_open,
1456         .release = watchdog_close,
1457         .write = watchdog_write,
1458         .unlocked_ioctl = watchdog_ioctl,
1459         .compat_ioctl = compat_ptr_ioctl,
1460 };
1461
1462 /*
1463  *      Notifier for system down
1464  */
1465
1466 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1467                                void *unused)
1468 {
1469         struct w83793_data *data = NULL;
1470
1471         if (code == SYS_DOWN || code == SYS_HALT) {
1472
1473                 /* Disable each registered watchdog */
1474                 mutex_lock(&watchdog_data_mutex);
1475                 list_for_each_entry(data, &watchdog_data_list, list) {
1476                         if (data->watchdog_miscdev.minor)
1477                                 watchdog_disable(data);
1478                 }
1479                 mutex_unlock(&watchdog_data_mutex);
1480         }
1481
1482         return NOTIFY_DONE;
1483 }
1484
1485 /*
1486  *      The WDT needs to learn about soft shutdowns in order to
1487  *      turn the timebomb registers off.
1488  */
1489
1490 static struct notifier_block watchdog_notifier = {
1491         .notifier_call = watchdog_notify_sys,
1492 };
1493
1494 /*
1495  * Init / remove routines
1496  */
1497
1498 static int w83793_remove(struct i2c_client *client)
1499 {
1500         struct w83793_data *data = i2c_get_clientdata(client);
1501         struct device *dev = &client->dev;
1502         int i, tmp;
1503
1504         /* Unregister the watchdog (if registered) */
1505         if (data->watchdog_miscdev.minor) {
1506                 misc_deregister(&data->watchdog_miscdev);
1507
1508                 if (data->watchdog_is_open) {
1509                         dev_warn(&client->dev,
1510                                 "i2c client detached with watchdog open! "
1511                                 "Stopping watchdog.\n");
1512                         watchdog_disable(data);
1513                 }
1514
1515                 mutex_lock(&watchdog_data_mutex);
1516                 list_del(&data->list);
1517                 mutex_unlock(&watchdog_data_mutex);
1518
1519                 /* Tell the watchdog code the client is gone */
1520                 mutex_lock(&data->watchdog_lock);
1521                 data->client = NULL;
1522                 mutex_unlock(&data->watchdog_lock);
1523         }
1524
1525         /* Reset Configuration Register to Disable Watch Dog Registers */
1526         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1527         w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1528
1529         unregister_reboot_notifier(&watchdog_notifier);
1530
1531         hwmon_device_unregister(data->hwmon_dev);
1532
1533         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1534                 device_remove_file(dev,
1535                                    &w83793_sensor_attr_2[i].dev_attr);
1536
1537         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1538                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1539
1540         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1541                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1542         device_remove_file(dev, &dev_attr_vrm);
1543
1544         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1545                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1546
1547         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1548                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1549
1550         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1551                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1552
1553         /* Decrease data reference counter */
1554         mutex_lock(&watchdog_data_mutex);
1555         kref_put(&data->kref, w83793_release_resources);
1556         mutex_unlock(&watchdog_data_mutex);
1557
1558         return 0;
1559 }
1560
1561 static int
1562 w83793_detect_subclients(struct i2c_client *client)
1563 {
1564         int i, id;
1565         int address = client->addr;
1566         u8 tmp;
1567         struct i2c_adapter *adapter = client->adapter;
1568
1569         id = i2c_adapter_id(adapter);
1570         if (force_subclients[0] == id && force_subclients[1] == address) {
1571                 for (i = 2; i <= 3; i++) {
1572                         if (force_subclients[i] < 0x48
1573                             || force_subclients[i] > 0x4f) {
1574                                 dev_err(&client->dev,
1575                                         "invalid subclient "
1576                                         "address %d; must be 0x48-0x4f\n",
1577                                         force_subclients[i]);
1578                                 return -EINVAL;
1579                         }
1580                 }
1581                 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1582                                    (force_subclients[2] & 0x07) |
1583                                    ((force_subclients[3] & 0x07) << 4));
1584         }
1585
1586         tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1587
1588         if (!(tmp & 0x88) && (tmp & 0x7) == ((tmp >> 4) & 0x7)) {
1589                 dev_err(&client->dev,
1590                         "duplicate addresses 0x%x, use force_subclient\n", 0x48 + (tmp & 0x7));
1591                 return -ENODEV;
1592         }
1593
1594         if (!(tmp & 0x08))
1595                 devm_i2c_new_dummy_device(&client->dev, adapter, 0x48 + (tmp & 0x7));
1596
1597         if (!(tmp & 0x80))
1598                 devm_i2c_new_dummy_device(&client->dev, adapter, 0x48 + ((tmp >> 4) & 0x7));
1599
1600         return 0;
1601 }
1602
1603 /* Return 0 if detection is successful, -ENODEV otherwise */
1604 static int w83793_detect(struct i2c_client *client,
1605                          struct i2c_board_info *info)
1606 {
1607         u8 tmp, bank, chip_id;
1608         struct i2c_adapter *adapter = client->adapter;
1609         unsigned short address = client->addr;
1610
1611         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1612                 return -ENODEV;
1613
1614         bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1615
1616         tmp = bank & 0x80 ? 0x5c : 0xa3;
1617         /* Check Winbond vendor ID */
1618         if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1619                 pr_debug("w83793: Detection failed at check vendor id\n");
1620                 return -ENODEV;
1621         }
1622
1623         /*
1624          * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1625          * should match
1626          */
1627         if ((bank & 0x07) == 0
1628          && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1629             (address << 1)) {
1630                 pr_debug("w83793: Detection failed at check i2c addr\n");
1631                 return -ENODEV;
1632         }
1633
1634         /* Determine the chip type now */
1635         chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1636         if (chip_id != 0x7b)
1637                 return -ENODEV;
1638
1639         strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1640
1641         return 0;
1642 }
1643
1644 static int w83793_probe(struct i2c_client *client)
1645 {
1646         struct device *dev = &client->dev;
1647         static const int watchdog_minors[] = {
1648                 WATCHDOG_MINOR, 212, 213, 214, 215
1649         };
1650         struct w83793_data *data;
1651         int i, tmp, val, err;
1652         int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1653         int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1654         int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1655
1656         data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1657         if (!data) {
1658                 err = -ENOMEM;
1659                 goto exit;
1660         }
1661
1662         i2c_set_clientdata(client, data);
1663         data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1664         mutex_init(&data->update_lock);
1665         mutex_init(&data->watchdog_lock);
1666         INIT_LIST_HEAD(&data->list);
1667         kref_init(&data->kref);
1668
1669         /*
1670          * Store client pointer in our data struct for watchdog usage
1671          * (where the client is found through a data ptr instead of the
1672          * otherway around)
1673          */
1674         data->client = client;
1675
1676         err = w83793_detect_subclients(client);
1677         if (err)
1678                 goto free_mem;
1679
1680         /* Initialize the chip */
1681         w83793_init_client(client);
1682
1683         /*
1684          * Only fan 1-5 has their own input pins,
1685          * Pwm 1-3 has their own pins
1686          */
1687         data->has_fan = 0x1f;
1688         data->has_pwm = 0x07;
1689         tmp = w83793_read_value(client, W83793_REG_MFC);
1690         val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1691
1692         /* check the function of pins 49-56 */
1693         if (tmp & 0x80) {
1694                 data->has_vid |= 0x2;   /* has VIDB */
1695         } else {
1696                 data->has_pwm |= 0x18;  /* pwm 4,5 */
1697                 if (val & 0x01) {       /* fan 6 */
1698                         data->has_fan |= 0x20;
1699                         data->has_pwm |= 0x20;
1700                 }
1701                 if (val & 0x02) {       /* fan 7 */
1702                         data->has_fan |= 0x40;
1703                         data->has_pwm |= 0x40;
1704                 }
1705                 if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1706                         data->has_fan |= 0x80;
1707                         data->has_pwm |= 0x80;
1708                 }
1709         }
1710
1711         /* check the function of pins 37-40 */
1712         if (!(tmp & 0x29))
1713                 data->has_vid |= 0x1;   /* has VIDA */
1714         if (0x08 == (tmp & 0x0c)) {
1715                 if (val & 0x08) /* fan 9 */
1716                         data->has_fan |= 0x100;
1717                 if (val & 0x10) /* fan 10 */
1718                         data->has_fan |= 0x200;
1719         }
1720         if (0x20 == (tmp & 0x30)) {
1721                 if (val & 0x20) /* fan 11 */
1722                         data->has_fan |= 0x400;
1723                 if (val & 0x40) /* fan 12 */
1724                         data->has_fan |= 0x800;
1725         }
1726
1727         if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1728                 data->has_fan |= 0x80;
1729                 data->has_pwm |= 0x80;
1730         }
1731
1732         tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1733         if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1734                 data->has_fan |= 0x100;
1735         }
1736         if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1737                 data->has_fan |= 0x200;
1738         }
1739         if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1740                 data->has_fan |= 0x400;
1741         }
1742         if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1743                 data->has_fan |= 0x800;
1744         }
1745
1746         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1747         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1748         if (tmp & 0x01)
1749                 data->has_temp |= 0x01;
1750         if (tmp & 0x04)
1751                 data->has_temp |= 0x02;
1752         if (tmp & 0x10)
1753                 data->has_temp |= 0x04;
1754         if (tmp & 0x40)
1755                 data->has_temp |= 0x08;
1756
1757         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1758         if (tmp & 0x01)
1759                 data->has_temp |= 0x10;
1760         if (tmp & 0x02)
1761                 data->has_temp |= 0x20;
1762
1763         /* Register sysfs hooks */
1764         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1765                 err = device_create_file(dev,
1766                                          &w83793_sensor_attr_2[i].dev_attr);
1767                 if (err)
1768                         goto exit_remove;
1769         }
1770
1771         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1772                 if (!(data->has_vid & (1 << i)))
1773                         continue;
1774                 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1775                 if (err)
1776                         goto exit_remove;
1777         }
1778         if (data->has_vid) {
1779                 data->vrm = vid_which_vrm();
1780                 err = device_create_file(dev, &dev_attr_vrm);
1781                 if (err)
1782                         goto exit_remove;
1783         }
1784
1785         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1786                 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1787                 if (err)
1788                         goto exit_remove;
1789
1790         }
1791
1792         for (i = 0; i < 6; i++) {
1793                 int j;
1794                 if (!(data->has_temp & (1 << i)))
1795                         continue;
1796                 for (j = 0; j < files_temp; j++) {
1797                         err = device_create_file(dev,
1798                                                 &w83793_temp[(i) * files_temp
1799                                                                 + j].dev_attr);
1800                         if (err)
1801                                 goto exit_remove;
1802                 }
1803         }
1804
1805         for (i = 5; i < 12; i++) {
1806                 int j;
1807                 if (!(data->has_fan & (1 << i)))
1808                         continue;
1809                 for (j = 0; j < files_fan; j++) {
1810                         err = device_create_file(dev,
1811                                            &w83793_left_fan[(i - 5) * files_fan
1812                                                                 + j].dev_attr);
1813                         if (err)
1814                                 goto exit_remove;
1815                 }
1816         }
1817
1818         for (i = 3; i < 8; i++) {
1819                 int j;
1820                 if (!(data->has_pwm & (1 << i)))
1821                         continue;
1822                 for (j = 0; j < files_pwm; j++) {
1823                         err = device_create_file(dev,
1824                                            &w83793_left_pwm[(i - 3) * files_pwm
1825                                                                 + j].dev_attr);
1826                         if (err)
1827                                 goto exit_remove;
1828                 }
1829         }
1830
1831         data->hwmon_dev = hwmon_device_register(dev);
1832         if (IS_ERR(data->hwmon_dev)) {
1833                 err = PTR_ERR(data->hwmon_dev);
1834                 goto exit_remove;
1835         }
1836
1837         /* Watchdog initialization */
1838
1839         /* Register boot notifier */
1840         err = register_reboot_notifier(&watchdog_notifier);
1841         if (err != 0) {
1842                 dev_err(&client->dev,
1843                         "cannot register reboot notifier (err=%d)\n", err);
1844                 goto exit_devunreg;
1845         }
1846
1847         /*
1848          * Enable Watchdog registers.
1849          * Set Configuration Register to Enable Watch Dog Registers
1850          * (Bit 2) = XXXX, X1XX.
1851          */
1852         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1853         w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1854
1855         /* Set the default watchdog timeout */
1856         data->watchdog_timeout = timeout;
1857
1858         /* Check, if last reboot was caused by watchdog */
1859         data->watchdog_caused_reboot =
1860           w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1861
1862         /* Disable Soft Watchdog during initialiation */
1863         watchdog_disable(data);
1864
1865         /*
1866          * We take the data_mutex lock early so that watchdog_open() cannot
1867          * run when misc_register() has completed, but we've not yet added
1868          * our data to the watchdog_data_list (and set the default timeout)
1869          */
1870         mutex_lock(&watchdog_data_mutex);
1871         for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1872                 /* Register our watchdog part */
1873                 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1874                         "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1875                 data->watchdog_miscdev.name = data->watchdog_name;
1876                 data->watchdog_miscdev.fops = &watchdog_fops;
1877                 data->watchdog_miscdev.minor = watchdog_minors[i];
1878
1879                 err = misc_register(&data->watchdog_miscdev);
1880                 if (err == -EBUSY)
1881                         continue;
1882                 if (err) {
1883                         data->watchdog_miscdev.minor = 0;
1884                         dev_err(&client->dev,
1885                                 "Registering watchdog chardev: %d\n", err);
1886                         break;
1887                 }
1888
1889                 list_add(&data->list, &watchdog_data_list);
1890
1891                 dev_info(&client->dev,
1892                         "Registered watchdog chardev major 10, minor: %d\n",
1893                         watchdog_minors[i]);
1894                 break;
1895         }
1896         if (i == ARRAY_SIZE(watchdog_minors)) {
1897                 data->watchdog_miscdev.minor = 0;
1898                 dev_warn(&client->dev,
1899                          "Couldn't register watchdog chardev (due to no free minor)\n");
1900         }
1901
1902         mutex_unlock(&watchdog_data_mutex);
1903
1904         return 0;
1905
1906         /* Unregister hwmon device */
1907
1908 exit_devunreg:
1909
1910         hwmon_device_unregister(data->hwmon_dev);
1911
1912         /* Unregister sysfs hooks */
1913
1914 exit_remove:
1915         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1916                 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1917
1918         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1919                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1920
1921         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1922                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1923
1924         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1925                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1926
1927         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1928                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1929
1930         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1931                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1932 free_mem:
1933         kfree(data);
1934 exit:
1935         return err;
1936 }
1937
1938 static void w83793_update_nonvolatile(struct device *dev)
1939 {
1940         struct i2c_client *client = to_i2c_client(dev);
1941         struct w83793_data *data = i2c_get_clientdata(client);
1942         int i, j;
1943         /*
1944          * They are somewhat "stable" registers, and to update them every time
1945          * takes so much time, it's just not worthy. Update them in a long
1946          * interval to avoid exception.
1947          */
1948         if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1949               || !data->valid))
1950                 return;
1951         /* update voltage limits */
1952         for (i = 1; i < 3; i++) {
1953                 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1954                         data->in[j][i] =
1955                             w83793_read_value(client, W83793_REG_IN[j][i]);
1956                 }
1957                 data->in_low_bits[i] =
1958                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1959         }
1960
1961         for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1962                 /* Update the Fan measured value and limits */
1963                 if (!(data->has_fan & (1 << i)))
1964                         continue;
1965                 data->fan_min[i] =
1966                     w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1967                 data->fan_min[i] |=
1968                     w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1969         }
1970
1971         for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1972                 if (!(data->has_temp & (1 << i)))
1973                         continue;
1974                 data->temp_fan_map[i] =
1975                     w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
1976                 for (j = 1; j < 5; j++) {
1977                         data->temp[i][j] =
1978                             w83793_read_value(client, W83793_REG_TEMP[i][j]);
1979                 }
1980                 data->temp_cruise[i] =
1981                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
1982                 for (j = 0; j < 7; j++) {
1983                         data->sf2_pwm[i][j] =
1984                             w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
1985                         data->sf2_temp[i][j] =
1986                             w83793_read_value(client,
1987                                               W83793_REG_SF2_TEMP(i, j));
1988                 }
1989         }
1990
1991         for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
1992                 data->temp_mode[i] =
1993                     w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
1994
1995         for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
1996                 data->tolerance[i] =
1997                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
1998         }
1999
2000         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2001                 if (!(data->has_pwm & (1 << i)))
2002                         continue;
2003                 data->pwm[i][PWM_NONSTOP] =
2004                     w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2005                 data->pwm[i][PWM_START] =
2006                     w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2007                 data->pwm_stop_time[i] =
2008                     w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2009         }
2010
2011         data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2012         data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2013         data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2014         data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2015         data->temp_critical =
2016             w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2017         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2018
2019         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2020                 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2021
2022         data->last_nonvolatile = jiffies;
2023 }
2024
2025 static struct w83793_data *w83793_update_device(struct device *dev)
2026 {
2027         struct i2c_client *client = to_i2c_client(dev);
2028         struct w83793_data *data = i2c_get_clientdata(client);
2029         int i;
2030
2031         mutex_lock(&data->update_lock);
2032
2033         if (!(time_after(jiffies, data->last_updated + HZ * 2)
2034               || !data->valid))
2035                 goto END;
2036
2037         /* Update the voltages measured value and limits */
2038         for (i = 0; i < ARRAY_SIZE(data->in); i++)
2039                 data->in[i][IN_READ] =
2040                     w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2041
2042         data->in_low_bits[IN_READ] =
2043             w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2044
2045         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2046                 if (!(data->has_fan & (1 << i)))
2047                         continue;
2048                 data->fan[i] =
2049                     w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2050                 data->fan[i] |=
2051                     w83793_read_value(client, W83793_REG_FAN(i) + 1);
2052         }
2053
2054         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2055                 if (!(data->has_temp & (1 << i)))
2056                         continue;
2057                 data->temp[i][TEMP_READ] =
2058                     w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2059         }
2060
2061         data->temp_low_bits =
2062             w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2063
2064         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2065                 if (data->has_pwm & (1 << i))
2066                         data->pwm[i][PWM_DUTY] =
2067                             w83793_read_value(client,
2068                                               W83793_REG_PWM(i, PWM_DUTY));
2069         }
2070
2071         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2072                 data->alarms[i] =
2073                     w83793_read_value(client, W83793_REG_ALARM(i));
2074         if (data->has_vid & 0x01)
2075                 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2076         if (data->has_vid & 0x02)
2077                 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2078         w83793_update_nonvolatile(dev);
2079         data->last_updated = jiffies;
2080         data->valid = 1;
2081
2082 END:
2083         mutex_unlock(&data->update_lock);
2084         return data;
2085 }
2086
2087 /*
2088  * Ignore the possibility that somebody change bank outside the driver
2089  * Must be called with data->update_lock held, except during initialization
2090  */
2091 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2092 {
2093         struct w83793_data *data = i2c_get_clientdata(client);
2094         u8 res;
2095         u8 new_bank = reg >> 8;
2096
2097         new_bank |= data->bank & 0xfc;
2098         if (data->bank != new_bank) {
2099                 if (i2c_smbus_write_byte_data
2100                     (client, W83793_REG_BANKSEL, new_bank) >= 0)
2101                         data->bank = new_bank;
2102                 else {
2103                         dev_err(&client->dev,
2104                                 "set bank to %d failed, fall back "
2105                                 "to bank %d, read reg 0x%x error\n",
2106                                 new_bank, data->bank, reg);
2107                         res = 0x0;      /* read 0x0 from the chip */
2108                         goto END;
2109                 }
2110         }
2111         res = i2c_smbus_read_byte_data(client, reg & 0xff);
2112 END:
2113         return res;
2114 }
2115
2116 /* Must be called with data->update_lock held, except during initialization */
2117 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2118 {
2119         struct w83793_data *data = i2c_get_clientdata(client);
2120         int res;
2121         u8 new_bank = reg >> 8;
2122
2123         new_bank |= data->bank & 0xfc;
2124         if (data->bank != new_bank) {
2125                 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2126                                                 new_bank);
2127                 if (res < 0) {
2128                         dev_err(&client->dev,
2129                                 "set bank to %d failed, fall back "
2130                                 "to bank %d, write reg 0x%x error\n",
2131                                 new_bank, data->bank, reg);
2132                         goto END;
2133                 }
2134                 data->bank = new_bank;
2135         }
2136
2137         res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2138 END:
2139         return res;
2140 }
2141
2142 module_i2c_driver(w83793_driver);
2143
2144 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2145 MODULE_DESCRIPTION("w83793 driver");
2146 MODULE_LICENSE("GPL");