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 static int w83793_detect(struct i2c_client *client,
 288                          struct i2c_board_info *info);
 289 static int w83793_remove(struct i2c_client *client);
 290 static void w83793_init_client(struct i2c_client *client);
 291 static void w83793_update_nonvolatile(struct device *dev);
 292 static struct w83793_data *w83793_update_device(struct device *dev);
 293
 294 static const struct i2c_device_id w83793_id[] = {
 295         { "w83793", 0 },
 296         { }
 297 };
 298 MODULE_DEVICE_TABLE(i2c, w83793_id);
 299
 300 static struct i2c_driver w83793_driver = {
 301         .class          = I2C_CLASS_HWMON,
 302         .driver = {
 303                    .name = "w83793",
 304         },
 305         .probe_new      = w83793_probe,
 306         .remove         = w83793_remove,
 307         .id_table       = w83793_id,
 308         .detect         = w83793_detect,
 309         .address_list   = normal_i2c,
 310 };
 311
 312 static ssize_t
 313 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 314 {
 315         struct w83793_data *data = dev_get_drvdata(dev);
 316         return sprintf(buf, "%d\n", data->vrm);
 317 }
 318
 319 static ssize_t
 320 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 321 {
 322         struct w83793_data *data = w83793_update_device(dev);
 323         struct sensor_device_attribute_2 *sensor_attr =
 324             to_sensor_dev_attr_2(attr);
 325         int index = sensor_attr->index;
 326
 327         return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
 328 }
 329
 330 static ssize_t
 331 vrm_store(struct device *dev, struct device_attribute *attr,
 332           const char *buf, size_t count)
 333 {
 334         struct w83793_data *data = dev_get_drvdata(dev);
 335         unsigned long val;
 336         int err;
 337
 338         err = kstrtoul(buf, 10, &val);
 339         if (err)
 340                 return err;
 341
 342         if (val > 255)
 343                 return -EINVAL;
 344
 345         data->vrm = val;
 346         return count;
 347 }
 348
 349 #define ALARM_STATUS                    0
 350 #define BEEP_ENABLE                     1
 351 static ssize_t
 352 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 353 {
 354         struct w83793_data *data = w83793_update_device(dev);
 355         struct sensor_device_attribute_2 *sensor_attr =
 356             to_sensor_dev_attr_2(attr);
 357         int nr = sensor_attr->nr;
 358         int index = sensor_attr->index >> 3;
 359         int bit = sensor_attr->index & 0x07;
 360         u8 val;
 361
 362         if (nr == ALARM_STATUS) {
 363                 val = (data->alarms[index] >> (bit)) & 1;
 364         } else {                /* BEEP_ENABLE */
 365                 val = (data->beeps[index] >> (bit)) & 1;
 366         }
 367
 368         return sprintf(buf, "%u\n", val);
 369 }
 370
 371 static ssize_t
 372 store_beep(struct device *dev, struct device_attribute *attr,
 373            const char *buf, size_t count)
 374 {
 375         struct i2c_client *client = to_i2c_client(dev);
 376         struct w83793_data *data = i2c_get_clientdata(client);
 377         struct sensor_device_attribute_2 *sensor_attr =
 378             to_sensor_dev_attr_2(attr);
 379         int index = sensor_attr->index >> 3;
 380         int shift = sensor_attr->index & 0x07;
 381         u8 beep_bit = 1 << shift;
 382         unsigned long val;
 383         int err;
 384
 385         err = kstrtoul(buf, 10, &val);
 386         if (err)
 387                 return err;
 388
 389         if (val > 1)
 390                 return -EINVAL;
 391
 392         mutex_lock(&data->update_lock);
 393         data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
 394         data->beeps[index] &= ~beep_bit;
 395         data->beeps[index] |= val << shift;
 396         w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
 397         mutex_unlock(&data->update_lock);
 398
 399         return count;
 400 }
 401
 402 static ssize_t
 403 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
 404 {
 405         struct w83793_data *data = w83793_update_device(dev);
 406         return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
 407 }
 408
 409 static ssize_t
 410 store_beep_enable(struct device *dev, struct device_attribute *attr,
 411                   const char *buf, size_t count)
 412 {
 413         struct i2c_client *client = to_i2c_client(dev);
 414         struct w83793_data *data = i2c_get_clientdata(client);
 415         unsigned long val;
 416         int err;
 417
 418         err = kstrtoul(buf, 10, &val);
 419         if (err)
 420                 return err;
 421
 422         if (val > 1)
 423                 return -EINVAL;
 424
 425         mutex_lock(&data->update_lock);
 426         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
 427                             & 0xfd;
 428         data->beep_enable |= val << 1;
 429         w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
 430         mutex_unlock(&data->update_lock);
 431
 432         return count;
 433 }
 434
 435 /* Write 0 to clear chassis alarm */
 436 static ssize_t
 437 store_chassis_clear(struct device *dev,
 438                     struct device_attribute *attr, const char *buf,
 439                     size_t count)
 440 {
 441         struct i2c_client *client = to_i2c_client(dev);
 442         struct w83793_data *data = i2c_get_clientdata(client);
 443         unsigned long val;
 444         u8 reg;
 445         int err;
 446
 447         err = kstrtoul(buf, 10, &val);
 448         if (err)
 449                 return err;
 450         if (val)
 451                 return -EINVAL;
 452
 453         mutex_lock(&data->update_lock);
 454         reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 455         w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
 456         data->valid = 0;                /* Force cache refresh */
 457         mutex_unlock(&data->update_lock);
 458         return count;
 459 }
 460
 461 #define FAN_INPUT                       0
 462 #define FAN_MIN                         1
 463 static ssize_t
 464 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 465 {
 466         struct sensor_device_attribute_2 *sensor_attr =
 467             to_sensor_dev_attr_2(attr);
 468         int nr = sensor_attr->nr;
 469         int index = sensor_attr->index;
 470         struct w83793_data *data = w83793_update_device(dev);
 471         u16 val;
 472
 473         if (nr == FAN_INPUT)
 474                 val = data->fan[index] & 0x0fff;
 475         else
 476                 val = data->fan_min[index] & 0x0fff;
 477
 478         return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
 479 }
 480
 481 static ssize_t
 482 store_fan_min(struct device *dev, struct device_attribute *attr,
 483               const char *buf, size_t count)
 484 {
 485         struct sensor_device_attribute_2 *sensor_attr =
 486             to_sensor_dev_attr_2(attr);
 487         int index = sensor_attr->index;
 488         struct i2c_client *client = to_i2c_client(dev);
 489         struct w83793_data *data = i2c_get_clientdata(client);
 490         unsigned long val;
 491         int err;
 492
 493         err = kstrtoul(buf, 10, &val);
 494         if (err)
 495                 return err;
 496         val = FAN_TO_REG(val);
 497
 498         mutex_lock(&data->update_lock);
 499         data->fan_min[index] = val;
 500         w83793_write_value(client, W83793_REG_FAN_MIN(index),
 501                            (val >> 8) & 0xff);
 502         w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
 503         mutex_unlock(&data->update_lock);
 504
 505         return count;
 506 }
 507
 508 static ssize_t
 509 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 510 {
 511         struct sensor_device_attribute_2 *sensor_attr =
 512             to_sensor_dev_attr_2(attr);
 513         struct w83793_data *data = w83793_update_device(dev);
 514         u16 val;
 515         int nr = sensor_attr->nr;
 516         int index = sensor_attr->index;
 517
 518         if (nr == PWM_STOP_TIME)
 519                 val = TIME_FROM_REG(data->pwm_stop_time[index]);
 520         else
 521                 val = (data->pwm[index][nr] & 0x3f) << 2;
 522
 523         return sprintf(buf, "%d\n", val);
 524 }
 525
 526 static ssize_t
 527 store_pwm(struct device *dev, struct device_attribute *attr,
 528           const char *buf, size_t count)
 529 {
 530         struct i2c_client *client = to_i2c_client(dev);
 531         struct w83793_data *data = i2c_get_clientdata(client);
 532         struct sensor_device_attribute_2 *sensor_attr =
 533             to_sensor_dev_attr_2(attr);
 534         int nr = sensor_attr->nr;
 535         int index = sensor_attr->index;
 536         unsigned long val;
 537         int err;
 538
 539         err = kstrtoul(buf, 10, &val);
 540         if (err)
 541                 return err;
 542
 543         mutex_lock(&data->update_lock);
 544         if (nr == PWM_STOP_TIME) {
 545                 val = TIME_TO_REG(val);
 546                 data->pwm_stop_time[index] = val;
 547                 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
 548                                    val);
 549         } else {
 550                 val = clamp_val(val, 0, 0xff) >> 2;
 551                 data->pwm[index][nr] =
 552                     w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
 553                 data->pwm[index][nr] |= val;
 554                 w83793_write_value(client, W83793_REG_PWM(index, nr),
 555                                                         data->pwm[index][nr]);
 556         }
 557
 558         mutex_unlock(&data->update_lock);
 559         return count;
 560 }
 561
 562 static ssize_t
 563 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 564 {
 565         struct sensor_device_attribute_2 *sensor_attr =
 566             to_sensor_dev_attr_2(attr);
 567         int nr = sensor_attr->nr;
 568         int index = sensor_attr->index;
 569         struct w83793_data *data = w83793_update_device(dev);
 570         long temp = TEMP_FROM_REG(data->temp[index][nr]);
 571
 572         if (nr == TEMP_READ && index < 4) {     /* Only TD1-TD4 have low bits */
 573                 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
 574                 temp += temp > 0 ? low : -low;
 575         }
 576         return sprintf(buf, "%ld\n", temp);
 577 }
 578
 579 static ssize_t
 580 store_temp(struct device *dev, struct device_attribute *attr,
 581            const char *buf, size_t count)
 582 {
 583         struct sensor_device_attribute_2 *sensor_attr =
 584             to_sensor_dev_attr_2(attr);
 585         int nr = sensor_attr->nr;
 586         int index = sensor_attr->index;
 587         struct i2c_client *client = to_i2c_client(dev);
 588         struct w83793_data *data = i2c_get_clientdata(client);
 589         long tmp;
 590         int err;
 591
 592         err = kstrtol(buf, 10, &tmp);
 593         if (err)
 594                 return err;
 595
 596         mutex_lock(&data->update_lock);
 597         data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
 598         w83793_write_value(client, W83793_REG_TEMP[index][nr],
 599                            data->temp[index][nr]);
 600         mutex_unlock(&data->update_lock);
 601         return count;
 602 }
 603
 604 /*
 605  * TD1-TD4
 606  * each has 4 mode:(2 bits)
 607  * 0:   Stop monitor
 608  * 1:   Use internal temp sensor(default)
 609  * 2:   Reserved
 610  * 3:   Use sensor in Intel CPU and get result by PECI
 611  *
 612  * TR1-TR2
 613  * each has 2 mode:(1 bit)
 614  * 0:   Disable temp sensor monitor
 615  * 1:   To enable temp sensors monitor
 616  */
 617
 618 /* 0 disable, 6 PECI */
 619 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
 620
 621 static ssize_t
 622 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
 623 {
 624         struct w83793_data *data = w83793_update_device(dev);
 625         struct sensor_device_attribute_2 *sensor_attr =
 626             to_sensor_dev_attr_2(attr);
 627         int index = sensor_attr->index;
 628         u8 mask = (index < 4) ? 0x03 : 0x01;
 629         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 630         u8 tmp;
 631         index = (index < 4) ? 0 : 1;
 632
 633         tmp = (data->temp_mode[index] >> shift) & mask;
 634
 635         /* for the internal sensor, found out if diode or thermistor */
 636         if (tmp == 1)
 637                 tmp = index == 0 ? 3 : 4;
 638         else
 639                 tmp = TO_TEMP_MODE[tmp];
 640
 641         return sprintf(buf, "%d\n", tmp);
 642 }
 643
 644 static ssize_t
 645 store_temp_mode(struct device *dev, struct device_attribute *attr,
 646                 const char *buf, size_t count)
 647 {
 648         struct i2c_client *client = to_i2c_client(dev);
 649         struct w83793_data *data = i2c_get_clientdata(client);
 650         struct sensor_device_attribute_2 *sensor_attr =
 651             to_sensor_dev_attr_2(attr);
 652         int index = sensor_attr->index;
 653         u8 mask = (index < 4) ? 0x03 : 0x01;
 654         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 655         unsigned long val;
 656         int err;
 657
 658         err = kstrtoul(buf, 10, &val);
 659         if (err)
 660                 return err;
 661
 662         /* transform the sysfs interface values into table above */
 663         if ((val == 6) && (index < 4)) {
 664                 val -= 3;
 665         } else if ((val == 3 && index < 4)
 666                 || (val == 4 && index >= 4)) {
 667                 /* transform diode or thermistor into internal enable */
 668                 val = !!val;
 669         } else {
 670                 return -EINVAL;
 671         }
 672
 673         index = (index < 4) ? 0 : 1;
 674         mutex_lock(&data->update_lock);
 675         data->temp_mode[index] =
 676             w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
 677         data->temp_mode[index] &= ~(mask << shift);
 678         data->temp_mode[index] |= val << shift;
 679         w83793_write_value(client, W83793_REG_TEMP_MODE[index],
 680                                                         data->temp_mode[index]);
 681         mutex_unlock(&data->update_lock);
 682
 683         return count;
 684 }
 685
 686 #define SETUP_PWM_DEFAULT               0
 687 #define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
 688 #define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
 689 #define SETUP_TEMP_CRITICAL             3
 690 static ssize_t
 691 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
 692 {
 693         struct sensor_device_attribute_2 *sensor_attr =
 694             to_sensor_dev_attr_2(attr);
 695         int nr = sensor_attr->nr;
 696         struct w83793_data *data = w83793_update_device(dev);
 697         u32 val = 0;
 698
 699         if (nr == SETUP_PWM_DEFAULT)
 700                 val = (data->pwm_default & 0x3f) << 2;
 701         else if (nr == SETUP_PWM_UPTIME)
 702                 val = TIME_FROM_REG(data->pwm_uptime);
 703         else if (nr == SETUP_PWM_DOWNTIME)
 704                 val = TIME_FROM_REG(data->pwm_downtime);
 705         else if (nr == SETUP_TEMP_CRITICAL)
 706                 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
 707
 708         return sprintf(buf, "%d\n", val);
 709 }
 710
 711 static ssize_t
 712 store_sf_setup(struct device *dev, struct device_attribute *attr,
 713                const char *buf, size_t count)
 714 {
 715         struct sensor_device_attribute_2 *sensor_attr =
 716             to_sensor_dev_attr_2(attr);
 717         int nr = sensor_attr->nr;
 718         struct i2c_client *client = to_i2c_client(dev);
 719         struct w83793_data *data = i2c_get_clientdata(client);
 720         long val;
 721         int err;
 722
 723         err = kstrtol(buf, 10, &val);
 724         if (err)
 725                 return err;
 726
 727         mutex_lock(&data->update_lock);
 728         if (nr == SETUP_PWM_DEFAULT) {
 729                 data->pwm_default =
 730                     w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
 731                 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
 732                 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
 733                                                         data->pwm_default);
 734         } else if (nr == SETUP_PWM_UPTIME) {
 735                 data->pwm_uptime = TIME_TO_REG(val);
 736                 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
 737                 w83793_write_value(client, W83793_REG_PWM_UPTIME,
 738                                                         data->pwm_uptime);
 739         } else if (nr == SETUP_PWM_DOWNTIME) {
 740                 data->pwm_downtime = TIME_TO_REG(val);
 741                 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
 742                 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
 743                                                         data->pwm_downtime);
 744         } else {                /* SETUP_TEMP_CRITICAL */
 745                 data->temp_critical =
 746                     w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
 747                 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
 748                 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
 749                                                         data->temp_critical);
 750         }
 751
 752         mutex_unlock(&data->update_lock);
 753         return count;
 754 }
 755
 756 /*
 757  * Temp SmartFan control
 758  * TEMP_FAN_MAP
 759  * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
 760  * It's possible two or more temp channels control the same fan, w83793
 761  * always prefers to pick the most critical request and applies it to
 762  * the related Fan.
 763  * It's possible one fan is not in any mapping of 6 temp channels, this
 764  * means the fan is manual mode
 765  *
 766  * TEMP_PWM_ENABLE
 767  * Each temp channel has its own SmartFan mode, and temp channel
 768  * control fans that are set by TEMP_FAN_MAP
 769  * 0:   SmartFanII mode
 770  * 1:   Thermal Cruise Mode
 771  *
 772  * TEMP_CRUISE
 773  * Target temperature in thermal cruise mode, w83793 will try to turn
 774  * fan speed to keep the temperature of target device around this
 775  * temperature.
 776  *
 777  * TEMP_TOLERANCE
 778  * If Temp higher or lower than target with this tolerance, w83793
 779  * will take actions to speed up or slow down the fan to keep the
 780  * temperature within the tolerance range.
 781  */
 782
 783 #define TEMP_FAN_MAP                    0
 784 #define TEMP_PWM_ENABLE                 1
 785 #define TEMP_CRUISE                     2
 786 #define TEMP_TOLERANCE                  3
 787 static ssize_t
 788 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
 789 {
 790         struct sensor_device_attribute_2 *sensor_attr =
 791             to_sensor_dev_attr_2(attr);
 792         int nr = sensor_attr->nr;
 793         int index = sensor_attr->index;
 794         struct w83793_data *data = w83793_update_device(dev);
 795         u32 val;
 796
 797         if (nr == TEMP_FAN_MAP) {
 798                 val = data->temp_fan_map[index];
 799         } else if (nr == TEMP_PWM_ENABLE) {
 800                 /* +2 to transform into 2 and 3 to conform with sysfs intf */
 801                 val = ((data->pwm_enable >> index) & 0x01) + 2;
 802         } else if (nr == TEMP_CRUISE) {
 803                 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
 804         } else {                /* TEMP_TOLERANCE */
 805                 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
 806                 val = TEMP_FROM_REG(val & 0x0f);
 807         }
 808         return sprintf(buf, "%d\n", val);
 809 }
 810
 811 static ssize_t
 812 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
 813               const char *buf, size_t count)
 814 {
 815         struct sensor_device_attribute_2 *sensor_attr =
 816             to_sensor_dev_attr_2(attr);
 817         int nr = sensor_attr->nr;
 818         int index = sensor_attr->index;
 819         struct i2c_client *client = to_i2c_client(dev);
 820         struct w83793_data *data = i2c_get_clientdata(client);
 821         long val;
 822         int err;
 823
 824         err = kstrtol(buf, 10, &val);
 825         if (err)
 826                 return err;
 827
 828         mutex_lock(&data->update_lock);
 829         if (nr == TEMP_FAN_MAP) {
 830                 val = clamp_val(val, 0, 255);
 831                 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
 832                 data->temp_fan_map[index] = val;
 833         } else if (nr == TEMP_PWM_ENABLE) {
 834                 if (val == 2 || val == 3) {
 835                         data->pwm_enable =
 836                             w83793_read_value(client, W83793_REG_PWM_ENABLE);
 837                         if (val - 2)
 838                                 data->pwm_enable |= 1 << index;
 839                         else
 840                                 data->pwm_enable &= ~(1 << index);
 841                         w83793_write_value(client, W83793_REG_PWM_ENABLE,
 842                                                         data->pwm_enable);
 843                 } else {
 844                         mutex_unlock(&data->update_lock);
 845                         return -EINVAL;
 846                 }
 847         } else if (nr == TEMP_CRUISE) {
 848                 data->temp_cruise[index] =
 849                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
 850                 data->temp_cruise[index] &= 0x80;
 851                 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
 852
 853                 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
 854                                                 data->temp_cruise[index]);
 855         } else {                /* TEMP_TOLERANCE */
 856                 int i = index >> 1;
 857                 u8 shift = (index & 0x01) ? 4 : 0;
 858                 data->tolerance[i] =
 859                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
 860
 861                 data->tolerance[i] &= ~(0x0f << shift);
 862                 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
 863                 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
 864                                                         data->tolerance[i]);
 865         }
 866
 867         mutex_unlock(&data->update_lock);
 868         return count;
 869 }
 870
 871 static ssize_t
 872 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 873 {
 874         struct sensor_device_attribute_2 *sensor_attr =
 875             to_sensor_dev_attr_2(attr);
 876         int nr = sensor_attr->nr;
 877         int index = sensor_attr->index;
 878         struct w83793_data *data = w83793_update_device(dev);
 879
 880         return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
 881 }
 882
 883 static ssize_t
 884 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
 885               const char *buf, size_t count)
 886 {
 887         struct i2c_client *client = to_i2c_client(dev);
 888         struct w83793_data *data = i2c_get_clientdata(client);
 889         struct sensor_device_attribute_2 *sensor_attr =
 890             to_sensor_dev_attr_2(attr);
 891         int nr = sensor_attr->nr;
 892         int index = sensor_attr->index;
 893         unsigned long val;
 894         int err;
 895
 896         err = kstrtoul(buf, 10, &val);
 897         if (err)
 898                 return err;
 899         val = clamp_val(val, 0, 0xff) >> 2;
 900
 901         mutex_lock(&data->update_lock);
 902         data->sf2_pwm[index][nr] =
 903             w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
 904         data->sf2_pwm[index][nr] |= val;
 905         w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
 906                                                 data->sf2_pwm[index][nr]);
 907         mutex_unlock(&data->update_lock);
 908         return count;
 909 }
 910
 911 static ssize_t
 912 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
 913 {
 914         struct sensor_device_attribute_2 *sensor_attr =
 915             to_sensor_dev_attr_2(attr);
 916         int nr = sensor_attr->nr;
 917         int index = sensor_attr->index;
 918         struct w83793_data *data = w83793_update_device(dev);
 919
 920         return sprintf(buf, "%ld\n",
 921                        TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
 922 }
 923
 924 static ssize_t
 925 store_sf2_temp(struct device *dev, struct device_attribute *attr,
 926                const char *buf, size_t count)
 927 {
 928         struct i2c_client *client = to_i2c_client(dev);
 929         struct w83793_data *data = i2c_get_clientdata(client);
 930         struct sensor_device_attribute_2 *sensor_attr =
 931             to_sensor_dev_attr_2(attr);
 932         int nr = sensor_attr->nr;
 933         int index = sensor_attr->index;
 934         long val;
 935         int err;
 936
 937         err = kstrtol(buf, 10, &val);
 938         if (err)
 939                 return err;
 940         val = TEMP_TO_REG(val, 0, 0x7f);
 941
 942         mutex_lock(&data->update_lock);
 943         data->sf2_temp[index][nr] =
 944             w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
 945         data->sf2_temp[index][nr] |= val;
 946         w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
 947                                              data->sf2_temp[index][nr]);
 948         mutex_unlock(&data->update_lock);
 949         return count;
 950 }
 951
 952 /* only Vcore A/B and Vtt have additional 2 bits precision */
 953 static ssize_t
 954 show_in(struct device *dev, struct device_attribute *attr, char *buf)
 955 {
 956         struct sensor_device_attribute_2 *sensor_attr =
 957             to_sensor_dev_attr_2(attr);
 958         int nr = sensor_attr->nr;
 959         int index = sensor_attr->index;
 960         struct w83793_data *data = w83793_update_device(dev);
 961         u16 val = data->in[index][nr];
 962
 963         if (index < 3) {
 964                 val <<= 2;
 965                 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
 966         }
 967         /* voltage inputs 5VDD and 5VSB needs 150mV offset */
 968         val = val * scale_in[index] + scale_in_add[index];
 969         return sprintf(buf, "%d\n", val);
 970 }
 971
 972 static ssize_t
 973 store_in(struct device *dev, struct device_attribute *attr,
 974          const char *buf, size_t count)
 975 {
 976         struct sensor_device_attribute_2 *sensor_attr =
 977             to_sensor_dev_attr_2(attr);
 978         int nr = sensor_attr->nr;
 979         int index = sensor_attr->index;
 980         struct i2c_client *client = to_i2c_client(dev);
 981         struct w83793_data *data = i2c_get_clientdata(client);
 982         unsigned long val;
 983         int err;
 984
 985         err = kstrtoul(buf, 10, &val);
 986         if (err)
 987                 return err;
 988         val = (val + scale_in[index] / 2) / scale_in[index];
 989
 990         mutex_lock(&data->update_lock);
 991         if (index > 2) {
 992                 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
 993                 if (nr == 1 || nr == 2)
 994                         val -= scale_in_add[index] / scale_in[index];
 995                 val = clamp_val(val, 0, 255);
 996         } else {
 997                 val = clamp_val(val, 0, 0x3FF);
 998                 data->in_low_bits[nr] =
 999                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1000                 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1001                 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1002                 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1003                                                      data->in_low_bits[nr]);
1004                 val >>= 2;
1005         }
1006         data->in[index][nr] = val;
1007         w83793_write_value(client, W83793_REG_IN[index][nr],
1008                                                         data->in[index][nr]);
1009         mutex_unlock(&data->update_lock);
1010         return count;
1011 }
1012
1013 #define NOT_USED                        -1
1014
1015 #define SENSOR_ATTR_IN(index)                                           \
1016         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1017                 IN_READ, index),                                        \
1018         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1019                 store_in, IN_MAX, index),                               \
1020         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1021                 store_in, IN_LOW, index),                               \
1022         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1023                 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
1024         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1025                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1026                 index + ((index > 2) ? 1 : 0))
1027
1028 #define SENSOR_ATTR_FAN(index)                                          \
1029         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1030                 NULL, ALARM_STATUS, index + 17),                        \
1031         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1032                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
1033         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1034                 NULL, FAN_INPUT, index - 1),                            \
1035         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1036                 show_fan, store_fan_min, FAN_MIN, index - 1)
1037
1038 #define SENSOR_ATTR_PWM(index)                                          \
1039         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1040                 store_pwm, PWM_DUTY, index - 1),                        \
1041         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1042                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1043         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1044                 show_pwm, store_pwm, PWM_START, index - 1),             \
1045         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1046                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1047
1048 #define SENSOR_ATTR_TEMP(index)                                         \
1049         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1050                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1051         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1052                 NULL, TEMP_READ, index - 1),                            \
1053         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1054                 store_temp, TEMP_CRIT, index - 1),                      \
1055         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1056                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1057         SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1058                 store_temp, TEMP_WARN, index - 1),                      \
1059         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1060                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1061         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1062                 show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1063         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1064                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1065         SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1066                 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1067                 TEMP_FAN_MAP, index - 1),                               \
1068         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1069                 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1070                 index - 1),                                             \
1071         SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1072                 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1073         SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1074                 store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1075         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1076                 show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1077         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1078                 show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1079         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1080                 show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1081         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1082                 show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1083         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1084                 show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1085         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1086                 show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1087         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1088                 show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1089         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1090                 show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1091         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1092                 show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1093         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1094                 show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1095         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1096                 show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1097         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1098                 show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1099         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1100                 show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1101         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1102                 show_sf2_temp, store_sf2_temp, 6, index - 1)
1103
1104 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1105         SENSOR_ATTR_IN(0),
1106         SENSOR_ATTR_IN(1),
1107         SENSOR_ATTR_IN(2),
1108         SENSOR_ATTR_IN(3),
1109         SENSOR_ATTR_IN(4),
1110         SENSOR_ATTR_IN(5),
1111         SENSOR_ATTR_IN(6),
1112         SENSOR_ATTR_IN(7),
1113         SENSOR_ATTR_IN(8),
1114         SENSOR_ATTR_IN(9),
1115         SENSOR_ATTR_FAN(1),
1116         SENSOR_ATTR_FAN(2),
1117         SENSOR_ATTR_FAN(3),
1118         SENSOR_ATTR_FAN(4),
1119         SENSOR_ATTR_FAN(5),
1120         SENSOR_ATTR_PWM(1),
1121         SENSOR_ATTR_PWM(2),
1122         SENSOR_ATTR_PWM(3),
1123 };
1124
1125 static struct sensor_device_attribute_2 w83793_temp[] = {
1126         SENSOR_ATTR_TEMP(1),
1127         SENSOR_ATTR_TEMP(2),
1128         SENSOR_ATTR_TEMP(3),
1129         SENSOR_ATTR_TEMP(4),
1130         SENSOR_ATTR_TEMP(5),
1131         SENSOR_ATTR_TEMP(6),
1132 };
1133
1134 /* Fan6-Fan12 */
1135 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1136         SENSOR_ATTR_FAN(6),
1137         SENSOR_ATTR_FAN(7),
1138         SENSOR_ATTR_FAN(8),
1139         SENSOR_ATTR_FAN(9),
1140         SENSOR_ATTR_FAN(10),
1141         SENSOR_ATTR_FAN(11),
1142         SENSOR_ATTR_FAN(12),
1143 };
1144
1145 /* Pwm4-Pwm8 */
1146 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1147         SENSOR_ATTR_PWM(4),
1148         SENSOR_ATTR_PWM(5),
1149         SENSOR_ATTR_PWM(6),
1150         SENSOR_ATTR_PWM(7),
1151         SENSOR_ATTR_PWM(8),
1152 };
1153
1154 static struct sensor_device_attribute_2 w83793_vid[] = {
1155         SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1156         SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1157 };
1158 static DEVICE_ATTR_RW(vrm);
1159
1160 static struct sensor_device_attribute_2 sda_single_files[] = {
1161         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1162                       store_chassis_clear, ALARM_STATUS, 30),
1163         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1164                       store_beep_enable, NOT_USED, NOT_USED),
1165         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1166                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1167         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1168                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1169         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1170                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1171         SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1172                       store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1173 };
1174
1175 static void w83793_init_client(struct i2c_client *client)
1176 {
1177         if (reset)
1178                 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1179
1180         /* Start monitoring */
1181         w83793_write_value(client, W83793_REG_CONFIG,
1182                            w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1183 }
1184
1185 /*
1186  * Watchdog routines
1187  */
1188
1189 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1190 {
1191         unsigned int mtimeout;
1192         int ret;
1193
1194         mtimeout = DIV_ROUND_UP(timeout, 60);
1195
1196         if (mtimeout > 255)
1197                 return -EINVAL;
1198
1199         mutex_lock(&data->watchdog_lock);
1200         if (!data->client) {
1201                 ret = -ENODEV;
1202                 goto leave;
1203         }
1204
1205         data->watchdog_timeout = mtimeout;
1206
1207         /* Set Timeout value (in Minutes) */
1208         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1209                            data->watchdog_timeout);
1210
1211         ret = mtimeout * 60;
1212
1213 leave:
1214         mutex_unlock(&data->watchdog_lock);
1215         return ret;
1216 }
1217
1218 static int watchdog_get_timeout(struct w83793_data *data)
1219 {
1220         int timeout;
1221
1222         mutex_lock(&data->watchdog_lock);
1223         timeout = data->watchdog_timeout * 60;
1224         mutex_unlock(&data->watchdog_lock);
1225
1226         return timeout;
1227 }
1228
1229 static int watchdog_trigger(struct w83793_data *data)
1230 {
1231         int ret = 0;
1232
1233         mutex_lock(&data->watchdog_lock);
1234         if (!data->client) {
1235                 ret = -ENODEV;
1236                 goto leave;
1237         }
1238
1239         /* Set Timeout value (in Minutes) */
1240         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1241                            data->watchdog_timeout);
1242
1243 leave:
1244         mutex_unlock(&data->watchdog_lock);
1245         return ret;
1246 }
1247
1248 static int watchdog_enable(struct w83793_data *data)
1249 {
1250         int ret = 0;
1251
1252         mutex_lock(&data->watchdog_lock);
1253         if (!data->client) {
1254                 ret = -ENODEV;
1255                 goto leave;
1256         }
1257
1258         /* Set initial timeout */
1259         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1260                            data->watchdog_timeout);
1261
1262         /* Enable Soft Watchdog */
1263         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1264
1265 leave:
1266         mutex_unlock(&data->watchdog_lock);
1267         return ret;
1268 }
1269
1270 static int watchdog_disable(struct w83793_data *data)
1271 {
1272         int ret = 0;
1273
1274         mutex_lock(&data->watchdog_lock);
1275         if (!data->client) {
1276                 ret = -ENODEV;
1277                 goto leave;
1278         }
1279
1280         /* Disable Soft Watchdog */
1281         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1282
1283 leave:
1284         mutex_unlock(&data->watchdog_lock);
1285         return ret;
1286 }
1287
1288 static int watchdog_open(struct inode *inode, struct file *filp)
1289 {
1290         struct w83793_data *pos, *data = NULL;
1291         int watchdog_is_open;
1292
1293         /*
1294          * We get called from drivers/char/misc.c with misc_mtx hold, and we
1295          * call misc_register() from  w83793_probe() with watchdog_data_mutex
1296          * hold, as misc_register() takes the misc_mtx lock, this is a possible
1297          * deadlock, so we use mutex_trylock here.
1298          */
1299         if (!mutex_trylock(&watchdog_data_mutex))
1300                 return -ERESTARTSYS;
1301         list_for_each_entry(pos, &watchdog_data_list, list) {
1302                 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1303                         data = pos;
1304                         break;
1305                 }
1306         }
1307
1308         /* Check, if device is already open */
1309         watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1310
1311         /*
1312          * Increase data reference counter (if not already done).
1313          * Note we can never not have found data, so we don't check for this
1314          */
1315         if (!watchdog_is_open)
1316                 kref_get(&data->kref);
1317
1318         mutex_unlock(&watchdog_data_mutex);
1319
1320         /* Check, if device is already open and possibly issue error */
1321         if (watchdog_is_open)
1322                 return -EBUSY;
1323
1324         /* Enable Soft Watchdog */
1325         watchdog_enable(data);
1326
1327         /* Store pointer to data into filp's private data */
1328         filp->private_data = data;
1329
1330         return stream_open(inode, filp);
1331 }
1332
1333 static int watchdog_close(struct inode *inode, struct file *filp)
1334 {
1335         struct w83793_data *data = filp->private_data;
1336
1337         if (data->watchdog_expect_close) {
1338                 watchdog_disable(data);
1339                 data->watchdog_expect_close = 0;
1340         } else {
1341                 watchdog_trigger(data);
1342                 dev_crit(&data->client->dev,
1343                         "unexpected close, not stopping watchdog!\n");
1344         }
1345
1346         clear_bit(0, &data->watchdog_is_open);
1347
1348         /* Decrease data reference counter */
1349         mutex_lock(&watchdog_data_mutex);
1350         kref_put(&data->kref, w83793_release_resources);
1351         mutex_unlock(&watchdog_data_mutex);
1352
1353         return 0;
1354 }
1355
1356 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1357         size_t count, loff_t *offset)
1358 {
1359         ssize_t ret;
1360         struct w83793_data *data = filp->private_data;
1361
1362         if (count) {
1363                 if (!nowayout) {
1364                         size_t i;
1365
1366                         /* Clear it in case it was set with a previous write */
1367                         data->watchdog_expect_close = 0;
1368
1369                         for (i = 0; i != count; i++) {
1370                                 char c;
1371                                 if (get_user(c, buf + i))
1372                                         return -EFAULT;
1373                                 if (c == 'V')
1374                                         data->watchdog_expect_close = 1;
1375                         }
1376                 }
1377                 ret = watchdog_trigger(data);
1378                 if (ret < 0)
1379                         return ret;
1380         }
1381         return count;
1382 }
1383
1384 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1385                            unsigned long arg)
1386 {
1387         struct watchdog_info ident = {
1388                 .options = WDIOF_KEEPALIVEPING |
1389                            WDIOF_SETTIMEOUT |
1390                            WDIOF_CARDRESET,
1391                 .identity = "w83793 watchdog"
1392         };
1393
1394         int val, ret = 0;
1395         struct w83793_data *data = filp->private_data;
1396
1397         switch (cmd) {
1398         case WDIOC_GETSUPPORT:
1399                 if (!nowayout)
1400                         ident.options |= WDIOF_MAGICCLOSE;
1401                 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1402                         ret = -EFAULT;
1403                 break;
1404
1405         case WDIOC_GETSTATUS:
1406                 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1407                 ret = put_user(val, (int __user *)arg);
1408                 break;
1409
1410         case WDIOC_GETBOOTSTATUS:
1411                 ret = put_user(0, (int __user *)arg);
1412                 break;
1413
1414         case WDIOC_KEEPALIVE:
1415                 ret = watchdog_trigger(data);
1416                 break;
1417
1418         case WDIOC_GETTIMEOUT:
1419                 val = watchdog_get_timeout(data);
1420                 ret = put_user(val, (int __user *)arg);
1421                 break;
1422
1423         case WDIOC_SETTIMEOUT:
1424                 if (get_user(val, (int __user *)arg)) {
1425                         ret = -EFAULT;
1426                         break;
1427                 }
1428                 ret = watchdog_set_timeout(data, val);
1429                 if (ret > 0)
1430                         ret = put_user(ret, (int __user *)arg);
1431                 break;
1432
1433         case WDIOC_SETOPTIONS:
1434                 if (get_user(val, (int __user *)arg)) {
1435                         ret = -EFAULT;
1436                         break;
1437                 }
1438
1439                 if (val & WDIOS_DISABLECARD)
1440                         ret = watchdog_disable(data);
1441                 else if (val & WDIOS_ENABLECARD)
1442                         ret = watchdog_enable(data);
1443                 else
1444                         ret = -EINVAL;
1445
1446                 break;
1447         default:
1448                 ret = -ENOTTY;
1449         }
1450         return ret;
1451 }
1452
1453 static const struct file_operations watchdog_fops = {
1454         .owner = THIS_MODULE,
1455         .llseek = no_llseek,
1456         .open = watchdog_open,
1457         .release = watchdog_close,
1458         .write = watchdog_write,
1459         .unlocked_ioctl = watchdog_ioctl,
1460         .compat_ioctl = compat_ptr_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         /* Decrease data reference counter */
1555         mutex_lock(&watchdog_data_mutex);
1556         kref_put(&data->kref, w83793_release_resources);
1557         mutex_unlock(&watchdog_data_mutex);
1558
1559         return 0;
1560 }
1561
1562 static int
1563 w83793_detect_subclients(struct i2c_client *client)
1564 {
1565         int i, id;
1566         int address = client->addr;
1567         u8 tmp;
1568         struct i2c_adapter *adapter = client->adapter;
1569         struct w83793_data *data = i2c_get_clientdata(client);
1570
1571         id = i2c_adapter_id(adapter);
1572         if (force_subclients[0] == id && force_subclients[1] == address) {
1573                 for (i = 2; i <= 3; i++) {
1574                         if (force_subclients[i] < 0x48
1575                             || force_subclients[i] > 0x4f) {
1576                                 dev_err(&client->dev,
1577                                         "invalid subclient "
1578                                         "address %d; must be 0x48-0x4f\n",
1579                                         force_subclients[i]);
1580                                 return -EINVAL;
1581                         }
1582                 }
1583                 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1584                                    (force_subclients[2] & 0x07) |
1585                                    ((force_subclients[3] & 0x07) << 4));
1586         }
1587
1588         tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1589         if (!(tmp & 0x08))
1590                 data->lm75[0] = devm_i2c_new_dummy_device(&client->dev, adapter,
1591                                                           0x48 + (tmp & 0x7));
1592         if (!(tmp & 0x80)) {
1593                 if (!IS_ERR(data->lm75[0])
1594                     && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1595                         dev_err(&client->dev,
1596                                 "duplicate addresses 0x%x, "
1597                                 "use force_subclients\n", data->lm75[0]->addr);
1598                         return -ENODEV;
1599                 }
1600                 data->lm75[1] = devm_i2c_new_dummy_device(&client->dev, adapter,
1601                                                           0x48 + ((tmp >> 4) & 0x7));
1602         }
1603
1604         return 0;
1605 }
1606
1607 /* Return 0 if detection is successful, -ENODEV otherwise */
1608 static int w83793_detect(struct i2c_client *client,
1609                          struct i2c_board_info *info)
1610 {
1611         u8 tmp, bank, chip_id;
1612         struct i2c_adapter *adapter = client->adapter;
1613         unsigned short address = client->addr;
1614
1615         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1616                 return -ENODEV;
1617
1618         bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1619
1620         tmp = bank & 0x80 ? 0x5c : 0xa3;
1621         /* Check Winbond vendor ID */
1622         if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1623                 pr_debug("w83793: Detection failed at check vendor id\n");
1624                 return -ENODEV;
1625         }
1626
1627         /*
1628          * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1629          * should match
1630          */
1631         if ((bank & 0x07) == 0
1632          && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1633             (address << 1)) {
1634                 pr_debug("w83793: Detection failed at check i2c addr\n");
1635                 return -ENODEV;
1636         }
1637
1638         /* Determine the chip type now */
1639         chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1640         if (chip_id != 0x7b)
1641                 return -ENODEV;
1642
1643         strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1644
1645         return 0;
1646 }
1647
1648 static int w83793_probe(struct i2c_client *client)
1649 {
1650         struct device *dev = &client->dev;
1651         static const int watchdog_minors[] = {
1652                 WATCHDOG_MINOR, 212, 213, 214, 215
1653         };
1654         struct w83793_data *data;
1655         int i, tmp, val, err;
1656         int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1657         int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1658         int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1659
1660         data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1661         if (!data) {
1662                 err = -ENOMEM;
1663                 goto exit;
1664         }
1665
1666         i2c_set_clientdata(client, data);
1667         data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1668         mutex_init(&data->update_lock);
1669         mutex_init(&data->watchdog_lock);
1670         INIT_LIST_HEAD(&data->list);
1671         kref_init(&data->kref);
1672
1673         /*
1674          * Store client pointer in our data struct for watchdog usage
1675          * (where the client is found through a data ptr instead of the
1676          * otherway around)
1677          */
1678         data->client = client;
1679
1680         err = w83793_detect_subclients(client);
1681         if (err)
1682                 goto free_mem;
1683
1684         /* Initialize the chip */
1685         w83793_init_client(client);
1686
1687         /*
1688          * Only fan 1-5 has their own input pins,
1689          * Pwm 1-3 has their own pins
1690          */
1691         data->has_fan = 0x1f;
1692         data->has_pwm = 0x07;
1693         tmp = w83793_read_value(client, W83793_REG_MFC);
1694         val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1695
1696         /* check the function of pins 49-56 */
1697         if (tmp & 0x80) {
1698                 data->has_vid |= 0x2;   /* has VIDB */
1699         } else {
1700                 data->has_pwm |= 0x18;  /* pwm 4,5 */
1701                 if (val & 0x01) {       /* fan 6 */
1702                         data->has_fan |= 0x20;
1703                         data->has_pwm |= 0x20;
1704                 }
1705                 if (val & 0x02) {       /* fan 7 */
1706                         data->has_fan |= 0x40;
1707                         data->has_pwm |= 0x40;
1708                 }
1709                 if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1710                         data->has_fan |= 0x80;
1711                         data->has_pwm |= 0x80;
1712                 }
1713         }
1714
1715         /* check the function of pins 37-40 */
1716         if (!(tmp & 0x29))
1717                 data->has_vid |= 0x1;   /* has VIDA */
1718         if (0x08 == (tmp & 0x0c)) {
1719                 if (val & 0x08) /* fan 9 */
1720                         data->has_fan |= 0x100;
1721                 if (val & 0x10) /* fan 10 */
1722                         data->has_fan |= 0x200;
1723         }
1724         if (0x20 == (tmp & 0x30)) {
1725                 if (val & 0x20) /* fan 11 */
1726                         data->has_fan |= 0x400;
1727                 if (val & 0x40) /* fan 12 */
1728                         data->has_fan |= 0x800;
1729         }
1730
1731         if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1732                 data->has_fan |= 0x80;
1733                 data->has_pwm |= 0x80;
1734         }
1735
1736         tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1737         if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1738                 data->has_fan |= 0x100;
1739         }
1740         if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1741                 data->has_fan |= 0x200;
1742         }
1743         if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1744                 data->has_fan |= 0x400;
1745         }
1746         if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1747                 data->has_fan |= 0x800;
1748         }
1749
1750         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1751         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1752         if (tmp & 0x01)
1753                 data->has_temp |= 0x01;
1754         if (tmp & 0x04)
1755                 data->has_temp |= 0x02;
1756         if (tmp & 0x10)
1757                 data->has_temp |= 0x04;
1758         if (tmp & 0x40)
1759                 data->has_temp |= 0x08;
1760
1761         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1762         if (tmp & 0x01)
1763                 data->has_temp |= 0x10;
1764         if (tmp & 0x02)
1765                 data->has_temp |= 0x20;
1766
1767         /* Register sysfs hooks */
1768         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1769                 err = device_create_file(dev,
1770                                          &w83793_sensor_attr_2[i].dev_attr);
1771                 if (err)
1772                         goto exit_remove;
1773         }
1774
1775         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1776                 if (!(data->has_vid & (1 << i)))
1777                         continue;
1778                 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1779                 if (err)
1780                         goto exit_remove;
1781         }
1782         if (data->has_vid) {
1783                 data->vrm = vid_which_vrm();
1784                 err = device_create_file(dev, &dev_attr_vrm);
1785                 if (err)
1786                         goto exit_remove;
1787         }
1788
1789         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1790                 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1791                 if (err)
1792                         goto exit_remove;
1793
1794         }
1795
1796         for (i = 0; i < 6; i++) {
1797                 int j;
1798                 if (!(data->has_temp & (1 << i)))
1799                         continue;
1800                 for (j = 0; j < files_temp; j++) {
1801                         err = device_create_file(dev,
1802                                                 &w83793_temp[(i) * files_temp
1803                                                                 + j].dev_attr);
1804                         if (err)
1805                                 goto exit_remove;
1806                 }
1807         }
1808
1809         for (i = 5; i < 12; i++) {
1810                 int j;
1811                 if (!(data->has_fan & (1 << i)))
1812                         continue;
1813                 for (j = 0; j < files_fan; j++) {
1814                         err = device_create_file(dev,
1815                                            &w83793_left_fan[(i - 5) * files_fan
1816                                                                 + j].dev_attr);
1817                         if (err)
1818                                 goto exit_remove;
1819                 }
1820         }
1821
1822         for (i = 3; i < 8; i++) {
1823                 int j;
1824                 if (!(data->has_pwm & (1 << i)))
1825                         continue;
1826                 for (j = 0; j < files_pwm; j++) {
1827                         err = device_create_file(dev,
1828                                            &w83793_left_pwm[(i - 3) * files_pwm
1829                                                                 + j].dev_attr);
1830                         if (err)
1831                                 goto exit_remove;
1832                 }
1833         }
1834
1835         data->hwmon_dev = hwmon_device_register(dev);
1836         if (IS_ERR(data->hwmon_dev)) {
1837                 err = PTR_ERR(data->hwmon_dev);
1838                 goto exit_remove;
1839         }
1840
1841         /* Watchdog initialization */
1842
1843         /* Register boot notifier */
1844         err = register_reboot_notifier(&watchdog_notifier);
1845         if (err != 0) {
1846                 dev_err(&client->dev,
1847                         "cannot register reboot notifier (err=%d)\n", err);
1848                 goto exit_devunreg;
1849         }
1850
1851         /*
1852          * Enable Watchdog registers.
1853          * Set Configuration Register to Enable Watch Dog Registers
1854          * (Bit 2) = XXXX, X1XX.
1855          */
1856         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1857         w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1858
1859         /* Set the default watchdog timeout */
1860         data->watchdog_timeout = timeout;
1861
1862         /* Check, if last reboot was caused by watchdog */
1863         data->watchdog_caused_reboot =
1864           w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1865
1866         /* Disable Soft Watchdog during initialiation */
1867         watchdog_disable(data);
1868
1869         /*
1870          * We take the data_mutex lock early so that watchdog_open() cannot
1871          * run when misc_register() has completed, but we've not yet added
1872          * our data to the watchdog_data_list (and set the default timeout)
1873          */
1874         mutex_lock(&watchdog_data_mutex);
1875         for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1876                 /* Register our watchdog part */
1877                 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1878                         "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1879                 data->watchdog_miscdev.name = data->watchdog_name;
1880                 data->watchdog_miscdev.fops = &watchdog_fops;
1881                 data->watchdog_miscdev.minor = watchdog_minors[i];
1882
1883                 err = misc_register(&data->watchdog_miscdev);
1884                 if (err == -EBUSY)
1885                         continue;
1886                 if (err) {
1887                         data->watchdog_miscdev.minor = 0;
1888                         dev_err(&client->dev,
1889                                 "Registering watchdog chardev: %d\n", err);
1890                         break;
1891                 }
1892
1893                 list_add(&data->list, &watchdog_data_list);
1894
1895                 dev_info(&client->dev,
1896                         "Registered watchdog chardev major 10, minor: %d\n",
1897                         watchdog_minors[i]);
1898                 break;
1899         }
1900         if (i == ARRAY_SIZE(watchdog_minors)) {
1901                 data->watchdog_miscdev.minor = 0;
1902                 dev_warn(&client->dev,
1903                          "Couldn't register watchdog chardev (due to no free minor)\n");
1904         }
1905
1906         mutex_unlock(&watchdog_data_mutex);
1907
1908         return 0;
1909
1910         /* Unregister hwmon device */
1911
1912 exit_devunreg:
1913
1914         hwmon_device_unregister(data->hwmon_dev);
1915
1916         /* Unregister sysfs hooks */
1917
1918 exit_remove:
1919         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1920                 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1921
1922         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1923                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1924
1925         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1926                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1927
1928         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1929                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1930
1931         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1932                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1933
1934         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1935                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1936 free_mem:
1937         kfree(data);
1938 exit:
1939         return err;
1940 }
1941
1942 static void w83793_update_nonvolatile(struct device *dev)
1943 {
1944         struct i2c_client *client = to_i2c_client(dev);
1945         struct w83793_data *data = i2c_get_clientdata(client);
1946         int i, j;
1947         /*
1948          * They are somewhat "stable" registers, and to update them every time
1949          * takes so much time, it's just not worthy. Update them in a long
1950          * interval to avoid exception.
1951          */
1952         if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1953               || !data->valid))
1954                 return;
1955         /* update voltage limits */
1956         for (i = 1; i < 3; i++) {
1957                 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1958                         data->in[j][i] =
1959                             w83793_read_value(client, W83793_REG_IN[j][i]);
1960                 }
1961                 data->in_low_bits[i] =
1962                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1963         }
1964
1965         for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1966                 /* Update the Fan measured value and limits */
1967                 if (!(data->has_fan & (1 << i)))
1968                         continue;
1969                 data->fan_min[i] =
1970                     w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1971                 data->fan_min[i] |=
1972                     w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
1973         }
1974
1975         for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1976                 if (!(data->has_temp & (1 << i)))
1977                         continue;
1978                 data->temp_fan_map[i] =
1979                     w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
1980                 for (j = 1; j < 5; j++) {
1981                         data->temp[i][j] =
1982                             w83793_read_value(client, W83793_REG_TEMP[i][j]);
1983                 }
1984                 data->temp_cruise[i] =
1985                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
1986                 for (j = 0; j < 7; j++) {
1987                         data->sf2_pwm[i][j] =
1988                             w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
1989                         data->sf2_temp[i][j] =
1990                             w83793_read_value(client,
1991                                               W83793_REG_SF2_TEMP(i, j));
1992                 }
1993         }
1994
1995         for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
1996                 data->temp_mode[i] =
1997                     w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
1998
1999         for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2000                 data->tolerance[i] =
2001                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2002         }
2003
2004         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2005                 if (!(data->has_pwm & (1 << i)))
2006                         continue;
2007                 data->pwm[i][PWM_NONSTOP] =
2008                     w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2009                 data->pwm[i][PWM_START] =
2010                     w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2011                 data->pwm_stop_time[i] =
2012                     w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2013         }
2014
2015         data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2016         data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2017         data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2018         data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2019         data->temp_critical =
2020             w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2021         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2022
2023         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2024                 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2025
2026         data->last_nonvolatile = jiffies;
2027 }
2028
2029 static struct w83793_data *w83793_update_device(struct device *dev)
2030 {
2031         struct i2c_client *client = to_i2c_client(dev);
2032         struct w83793_data *data = i2c_get_clientdata(client);
2033         int i;
2034
2035         mutex_lock(&data->update_lock);
2036
2037         if (!(time_after(jiffies, data->last_updated + HZ * 2)
2038               || !data->valid))
2039                 goto END;
2040
2041         /* Update the voltages measured value and limits */
2042         for (i = 0; i < ARRAY_SIZE(data->in); i++)
2043                 data->in[i][IN_READ] =
2044                     w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2045
2046         data->in_low_bits[IN_READ] =
2047             w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2048
2049         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2050                 if (!(data->has_fan & (1 << i)))
2051                         continue;
2052                 data->fan[i] =
2053                     w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2054                 data->fan[i] |=
2055                     w83793_read_value(client, W83793_REG_FAN(i) + 1);
2056         }
2057
2058         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2059                 if (!(data->has_temp & (1 << i)))
2060                         continue;
2061                 data->temp[i][TEMP_READ] =
2062                     w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2063         }
2064
2065         data->temp_low_bits =
2066             w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2067
2068         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2069                 if (data->has_pwm & (1 << i))
2070                         data->pwm[i][PWM_DUTY] =
2071                             w83793_read_value(client,
2072                                               W83793_REG_PWM(i, PWM_DUTY));
2073         }
2074
2075         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2076                 data->alarms[i] =
2077                     w83793_read_value(client, W83793_REG_ALARM(i));
2078         if (data->has_vid & 0x01)
2079                 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2080         if (data->has_vid & 0x02)
2081                 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2082         w83793_update_nonvolatile(dev);
2083         data->last_updated = jiffies;
2084         data->valid = 1;
2085
2086 END:
2087         mutex_unlock(&data->update_lock);
2088         return data;
2089 }
2090
2091 /*
2092  * Ignore the possibility that somebody change bank outside the driver
2093  * Must be called with data->update_lock held, except during initialization
2094  */
2095 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2096 {
2097         struct w83793_data *data = i2c_get_clientdata(client);
2098         u8 res;
2099         u8 new_bank = reg >> 8;
2100
2101         new_bank |= data->bank & 0xfc;
2102         if (data->bank != new_bank) {
2103                 if (i2c_smbus_write_byte_data
2104                     (client, W83793_REG_BANKSEL, new_bank) >= 0)
2105                         data->bank = new_bank;
2106                 else {
2107                         dev_err(&client->dev,
2108                                 "set bank to %d failed, fall back "
2109                                 "to bank %d, read reg 0x%x error\n",
2110                                 new_bank, data->bank, reg);
2111                         res = 0x0;      /* read 0x0 from the chip */
2112                         goto END;
2113                 }
2114         }
2115         res = i2c_smbus_read_byte_data(client, reg & 0xff);
2116 END:
2117         return res;
2118 }
2119
2120 /* Must be called with data->update_lock held, except during initialization */
2121 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2122 {
2123         struct w83793_data *data = i2c_get_clientdata(client);
2124         int res;
2125         u8 new_bank = reg >> 8;
2126
2127         new_bank |= data->bank & 0xfc;
2128         if (data->bank != new_bank) {
2129                 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2130                                                 new_bank);
2131                 if (res < 0) {
2132                         dev_err(&client->dev,
2133                                 "set bank to %d failed, fall back "
2134                                 "to bank %d, write reg 0x%x error\n",
2135                                 new_bank, data->bank, reg);
2136                         goto END;
2137                 }
2138                 data->bank = new_bank;
2139         }
2140
2141         res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2142 END:
2143         return res;
2144 }
2145
2146 module_i2c_driver(w83793_driver);
2147
2148 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2149 MODULE_DESCRIPTION("w83793 driver");
2150 MODULE_LICENSE("GPL");