drivers/hwmon/w83793.c

   1 /*
   2  * w83793.c - Linux kernel driver for hardware monitoring
   3  * Copyright (C) 2006 Winbond Electronics Corp.
   4  *            Yuan Mu
   5  *            Rudolf Marek <r.marek@assembler.cz>
   6  * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
   7  *              Watchdog driver part
   8  *              (Based partially on fschmd driver,
   9  *               Copyright 2007-2008 by Hans de Goede)
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation - version 2.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  23  * 02110-1301 USA.
  24  */
  25
  26 /*
  27  * Supports following chips:
  28  *
  29  * Chip #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  30  * w83793       10      12      8       6       0x7b    0x5ca3  yes     no
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/slab.h>
  36 #include <linux/i2c.h>
  37 #include <linux/hwmon.h>
  38 #include <linux/hwmon-vid.h>
  39 #include <linux/hwmon-sysfs.h>
  40 #include <linux/err.h>
  41 #include <linux/mutex.h>
  42 #include <linux/fs.h>
  43 #include <linux/watchdog.h>
  44 #include <linux/miscdevice.h>
  45 #include <linux/uaccess.h>
  46 #include <linux/kref.h>
  47 #include <linux/notifier.h>
  48 #include <linux/reboot.h>
  49 #include <linux/jiffies.h>
  50
  51 /* Default values */
  52 #define WATCHDOG_TIMEOUT 2      /* 2 minute default timeout */
  53
  54 /* Addresses to scan */
  55 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
  56                                                 I2C_CLIENT_END };
  57
  58 /* Insmod parameters */
  59
  60 static unsigned short force_subclients[4];
  61 module_param_array(force_subclients, short, NULL, 0);
  62 MODULE_PARM_DESC(force_subclients,
  63                  "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
  64
  65 static bool reset;
  66 module_param(reset, bool, 0);
  67 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  68
  69 static int timeout = WATCHDOG_TIMEOUT;  /* default timeout in minutes */
  70 module_param(timeout, int, 0);
  71 MODULE_PARM_DESC(timeout,
  72         "Watchdog timeout in minutes. 2<= timeout <=255 (default="
  73                                 __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
  74
  75 static bool nowayout = WATCHDOG_NOWAYOUT;
  76 module_param(nowayout, bool, 0);
  77 MODULE_PARM_DESC(nowayout,
  78         "Watchdog cannot be stopped once started (default="
  79                                 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
  80
  81 /*
  82  * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
  83  * as ID, Bank Select registers
  84  */
  85 #define W83793_REG_BANKSEL              0x00
  86 #define W83793_REG_VENDORID             0x0d
  87 #define W83793_REG_CHIPID               0x0e
  88 #define W83793_REG_DEVICEID             0x0f
  89
  90 #define W83793_REG_CONFIG               0x40
  91 #define W83793_REG_MFC                  0x58
  92 #define W83793_REG_FANIN_CTRL           0x5c
  93 #define W83793_REG_FANIN_SEL            0x5d
  94 #define W83793_REG_I2C_ADDR             0x0b
  95 #define W83793_REG_I2C_SUBADDR          0x0c
  96 #define W83793_REG_VID_INA              0x05
  97 #define W83793_REG_VID_INB              0x06
  98 #define W83793_REG_VID_LATCHA           0x07
  99 #define W83793_REG_VID_LATCHB           0x08
 100 #define W83793_REG_VID_CTRL             0x59
 101
 102 #define W83793_REG_WDT_LOCK             0x01
 103 #define W83793_REG_WDT_ENABLE           0x02
 104 #define W83793_REG_WDT_STATUS           0x03
 105 #define W83793_REG_WDT_TIMEOUT          0x04
 106
 107 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
 108
 109 #define TEMP_READ       0
 110 #define TEMP_CRIT       1
 111 #define TEMP_CRIT_HYST  2
 112 #define TEMP_WARN       3
 113 #define TEMP_WARN_HYST  4
 114 /*
 115  * only crit and crit_hyst affect real-time alarm status
 116  * current crit crit_hyst warn warn_hyst
 117  */
 118 static u16 W83793_REG_TEMP[][5] = {
 119         {0x1c, 0x78, 0x79, 0x7a, 0x7b},
 120         {0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
 121         {0x1e, 0x80, 0x81, 0x82, 0x83},
 122         {0x1f, 0x84, 0x85, 0x86, 0x87},
 123         {0x20, 0x88, 0x89, 0x8a, 0x8b},
 124         {0x21, 0x8c, 0x8d, 0x8e, 0x8f},
 125 };
 126
 127 #define W83793_REG_TEMP_LOW_BITS        0x22
 128
 129 #define W83793_REG_BEEP(index)          (0x53 + (index))
 130 #define W83793_REG_ALARM(index)         (0x4b + (index))
 131
 132 #define W83793_REG_CLR_CHASSIS          0x4a    /* SMI MASK4 */
 133 #define W83793_REG_IRQ_CTRL             0x50
 134 #define W83793_REG_OVT_CTRL             0x51
 135 #define W83793_REG_OVT_BEEP             0x52
 136
 137 #define IN_READ                         0
 138 #define IN_MAX                          1
 139 #define IN_LOW                          2
 140 static const u16 W83793_REG_IN[][3] = {
 141         /* Current, High, Low */
 142         {0x10, 0x60, 0x61},     /* Vcore A      */
 143         {0x11, 0x62, 0x63},     /* Vcore B      */
 144         {0x12, 0x64, 0x65},     /* Vtt          */
 145         {0x14, 0x6a, 0x6b},     /* VSEN1        */
 146         {0x15, 0x6c, 0x6d},     /* VSEN2        */
 147         {0x16, 0x6e, 0x6f},     /* +3VSEN       */
 148         {0x17, 0x70, 0x71},     /* +12VSEN      */
 149         {0x18, 0x72, 0x73},     /* 5VDD         */
 150         {0x19, 0x74, 0x75},     /* 5VSB         */
 151         {0x1a, 0x76, 0x77},     /* VBAT         */
 152 };
 153
 154 /* Low Bits of Vcore A/B Vtt Read/High/Low */
 155 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
 156 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
 157 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
 158
 159 #define W83793_REG_FAN(index)           (0x23 + 2 * (index))    /* High byte */
 160 #define W83793_REG_FAN_MIN(index)       (0x90 + 2 * (index))    /* High byte */
 161
 162 #define W83793_REG_PWM_DEFAULT          0xb2
 163 #define W83793_REG_PWM_ENABLE           0x207
 164 #define W83793_REG_PWM_UPTIME           0xc3    /* Unit in 0.1 second */
 165 #define W83793_REG_PWM_DOWNTIME         0xc4    /* Unit in 0.1 second */
 166 #define W83793_REG_TEMP_CRITICAL        0xc5
 167
 168 #define PWM_DUTY                        0
 169 #define PWM_START                       1
 170 #define PWM_NONSTOP                     2
 171 #define PWM_STOP_TIME                   3
 172 #define W83793_REG_PWM(index, nr)       (((nr) == 0 ? 0xb3 : \
 173                                          (nr) == 1 ? 0x220 : 0x218) + (index))
 174
 175 /* bit field, fan1 is bit0, fan2 is bit1 ... */
 176 #define W83793_REG_TEMP_FAN_MAP(index)  (0x201 + (index))
 177 #define W83793_REG_TEMP_TOL(index)      (0x208 + (index))
 178 #define W83793_REG_TEMP_CRUISE(index)   (0x210 + (index))
 179 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
 180 #define W83793_REG_SF2_TEMP(index, nr)  (0x230 + ((index) << 4) + (nr))
 181 #define W83793_REG_SF2_PWM(index, nr)   (0x238 + ((index) << 4) + (nr))
 182
 183 static inline unsigned long FAN_FROM_REG(u16 val)
 184 {
 185         if ((val >= 0xfff) || (val == 0))
 186                 return  0;
 187         return 1350000UL / val;
 188 }
 189
 190 static inline u16 FAN_TO_REG(long rpm)
 191 {
 192         if (rpm <= 0)
 193                 return 0x0fff;
 194         return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 195 }
 196
 197 static inline unsigned long TIME_FROM_REG(u8 reg)
 198 {
 199         return reg * 100;
 200 }
 201
 202 static inline u8 TIME_TO_REG(unsigned long val)
 203 {
 204         return clamp_val((val + 50) / 100, 0, 0xff);
 205 }
 206
 207 static inline long TEMP_FROM_REG(s8 reg)
 208 {
 209         return reg * 1000;
 210 }
 211
 212 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
 213 {
 214         return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max);
 215 }
 216
 217 struct w83793_data {
 218         struct i2c_client *lm75[2];
 219         struct device *hwmon_dev;
 220         struct mutex update_lock;
 221         char valid;                     /* !=0 if following fields are valid */
 222         unsigned long last_updated;     /* In jiffies */
 223         unsigned long last_nonvolatile; /* In jiffies, last time we update the
 224                                          * nonvolatile registers
 225                                          */
 226
 227         u8 bank;
 228         u8 vrm;
 229         u8 vid[2];
 230         u8 in[10][3];           /* Register value, read/high/low */
 231         u8 in_low_bits[3];      /* Additional resolution for VCore A/B Vtt */
 232
 233         u16 has_fan;            /* Only fan1- fan5 has own pins */
 234         u16 fan[12];            /* Register value combine */
 235         u16 fan_min[12];        /* Register value combine */
 236
 237         s8 temp[6][5];          /* current, crit, crit_hyst,warn, warn_hyst */
 238         u8 temp_low_bits;       /* Additional resolution TD1-TD4 */
 239         u8 temp_mode[2];        /* byte 0: Temp D1-D4 mode each has 2 bits
 240                                  * byte 1: Temp R1,R2 mode, each has 1 bit
 241                                  */
 242         u8 temp_critical;       /* If reached all fan will be at full speed */
 243         u8 temp_fan_map[6];     /* Temp controls which pwm fan, bit field */
 244
 245         u8 has_pwm;
 246         u8 has_temp;
 247         u8 has_vid;
 248         u8 pwm_enable;          /* Register value, each Temp has 1 bit */
 249         u8 pwm_uptime;          /* Register value */
 250         u8 pwm_downtime;        /* Register value */
 251         u8 pwm_default;         /* All fan default pwm, next poweron valid */
 252         u8 pwm[8][3];           /* Register value */
 253         u8 pwm_stop_time[8];
 254         u8 temp_cruise[6];
 255
 256         u8 alarms[5];           /* realtime status registers */
 257         u8 beeps[5];
 258         u8 beep_enable;
 259         u8 tolerance[3];        /* Temp tolerance(Smart Fan I/II) */
 260         u8 sf2_pwm[6][7];       /* Smart FanII: Fan duty cycle */
 261         u8 sf2_temp[6][7];      /* Smart FanII: Temp level point */
 262
 263         /* watchdog */
 264         struct i2c_client *client;
 265         struct mutex watchdog_lock;
 266         struct list_head list; /* member of the watchdog_data_list */
 267         struct kref kref;
 268         struct miscdevice watchdog_miscdev;
 269         unsigned long watchdog_is_open;
 270         char watchdog_expect_close;
 271         char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
 272         unsigned int watchdog_caused_reboot;
 273         int watchdog_timeout; /* watchdog timeout in minutes */
 274 };
 275
 276 /*
 277  * Somewhat ugly :( global data pointer list with all devices, so that
 278  * we can find our device data as when using misc_register. There is no
 279  * other method to get to one's device data from the open file-op and
 280  * for usage in the reboot notifier callback.
 281  */
 282 static LIST_HEAD(watchdog_data_list);
 283
 284 /* Note this lock not only protect list access, but also data.kref access */
 285 static DEFINE_MUTEX(watchdog_data_mutex);
 286
 287 /*
 288  * Release our data struct when we're detached from the i2c client *and* all
 289  * references to our watchdog device are released
 290  */
 291 static void w83793_release_resources(struct kref *ref)
 292 {
 293         struct w83793_data *data = container_of(ref, struct w83793_data, kref);
 294         kfree(data);
 295 }
 296
 297 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
 298 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
 299 static int w83793_probe(struct i2c_client *client,
 300                         const struct i2c_device_id *id);
 301 static int w83793_detect(struct i2c_client *client,
 302                          struct i2c_board_info *info);
 303 static int w83793_remove(struct i2c_client *client);
 304 static void w83793_init_client(struct i2c_client *client);
 305 static void w83793_update_nonvolatile(struct device *dev);
 306 static struct w83793_data *w83793_update_device(struct device *dev);
 307
 308 static const struct i2c_device_id w83793_id[] = {
 309         { "w83793", 0 },
 310         { }
 311 };
 312 MODULE_DEVICE_TABLE(i2c, w83793_id);
 313
 314 static struct i2c_driver w83793_driver = {
 315         .class          = I2C_CLASS_HWMON,
 316         .driver = {
 317                    .name = "w83793",
 318         },
 319         .probe          = w83793_probe,
 320         .remove         = w83793_remove,
 321         .id_table       = w83793_id,
 322         .detect         = w83793_detect,
 323         .address_list   = normal_i2c,
 324 };
 325
 326 static ssize_t
 327 show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
 328 {
 329         struct w83793_data *data = dev_get_drvdata(dev);
 330         return sprintf(buf, "%d\n", data->vrm);
 331 }
 332
 333 static ssize_t
 334 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 335 {
 336         struct w83793_data *data = w83793_update_device(dev);
 337         struct sensor_device_attribute_2 *sensor_attr =
 338             to_sensor_dev_attr_2(attr);
 339         int index = sensor_attr->index;
 340
 341         return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
 342 }
 343
 344 static ssize_t
 345 store_vrm(struct device *dev, struct device_attribute *attr,
 346           const char *buf, size_t count)
 347 {
 348         struct w83793_data *data = dev_get_drvdata(dev);
 349         unsigned long val;
 350         int err;
 351
 352         err = kstrtoul(buf, 10, &val);
 353         if (err)
 354                 return err;
 355
 356         if (val > 255)
 357                 return -EINVAL;
 358
 359         data->vrm = val;
 360         return count;
 361 }
 362
 363 #define ALARM_STATUS                    0
 364 #define BEEP_ENABLE                     1
 365 static ssize_t
 366 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 367 {
 368         struct w83793_data *data = w83793_update_device(dev);
 369         struct sensor_device_attribute_2 *sensor_attr =
 370             to_sensor_dev_attr_2(attr);
 371         int nr = sensor_attr->nr;
 372         int index = sensor_attr->index >> 3;
 373         int bit = sensor_attr->index & 0x07;
 374         u8 val;
 375
 376         if (nr == ALARM_STATUS) {
 377                 val = (data->alarms[index] >> (bit)) & 1;
 378         } else {                /* BEEP_ENABLE */
 379                 val = (data->beeps[index] >> (bit)) & 1;
 380         }
 381
 382         return sprintf(buf, "%u\n", val);
 383 }
 384
 385 static ssize_t
 386 store_beep(struct device *dev, struct device_attribute *attr,
 387            const char *buf, size_t count)
 388 {
 389         struct i2c_client *client = to_i2c_client(dev);
 390         struct w83793_data *data = i2c_get_clientdata(client);
 391         struct sensor_device_attribute_2 *sensor_attr =
 392             to_sensor_dev_attr_2(attr);
 393         int index = sensor_attr->index >> 3;
 394         int shift = sensor_attr->index & 0x07;
 395         u8 beep_bit = 1 << shift;
 396         unsigned long val;
 397         int err;
 398
 399         err = kstrtoul(buf, 10, &val);
 400         if (err)
 401                 return err;
 402
 403         if (val > 1)
 404                 return -EINVAL;
 405
 406         mutex_lock(&data->update_lock);
 407         data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
 408         data->beeps[index] &= ~beep_bit;
 409         data->beeps[index] |= val << shift;
 410         w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
 411         mutex_unlock(&data->update_lock);
 412
 413         return count;
 414 }
 415
 416 static ssize_t
 417 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
 418 {
 419         struct w83793_data *data = w83793_update_device(dev);
 420         return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
 421 }
 422
 423 static ssize_t
 424 store_beep_enable(struct device *dev, struct device_attribute *attr,
 425                   const char *buf, size_t count)
 426 {
 427         struct i2c_client *client = to_i2c_client(dev);
 428         struct w83793_data *data = i2c_get_clientdata(client);
 429         unsigned long val;
 430         int err;
 431
 432         err = kstrtoul(buf, 10, &val);
 433         if (err)
 434                 return err;
 435
 436         if (val > 1)
 437                 return -EINVAL;
 438
 439         mutex_lock(&data->update_lock);
 440         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
 441                             & 0xfd;
 442         data->beep_enable |= val << 1;
 443         w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
 444         mutex_unlock(&data->update_lock);
 445
 446         return count;
 447 }
 448
 449 /* Write 0 to clear chassis alarm */
 450 static ssize_t
 451 store_chassis_clear(struct device *dev,
 452                     struct device_attribute *attr, const char *buf,
 453                     size_t count)
 454 {
 455         struct i2c_client *client = to_i2c_client(dev);
 456         struct w83793_data *data = i2c_get_clientdata(client);
 457         unsigned long val;
 458         u8 reg;
 459         int err;
 460
 461         err = kstrtoul(buf, 10, &val);
 462         if (err)
 463                 return err;
 464         if (val)
 465                 return -EINVAL;
 466
 467         mutex_lock(&data->update_lock);
 468         reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 469         w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
 470         data->valid = 0;                /* Force cache refresh */
 471         mutex_unlock(&data->update_lock);
 472         return count;
 473 }
 474
 475 #define FAN_INPUT                       0
 476 #define FAN_MIN                         1
 477 static ssize_t
 478 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 479 {
 480         struct sensor_device_attribute_2 *sensor_attr =
 481             to_sensor_dev_attr_2(attr);
 482         int nr = sensor_attr->nr;
 483         int index = sensor_attr->index;
 484         struct w83793_data *data = w83793_update_device(dev);
 485         u16 val;
 486
 487         if (nr == FAN_INPUT)
 488                 val = data->fan[index] & 0x0fff;
 489         else
 490                 val = data->fan_min[index] & 0x0fff;
 491
 492         return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
 493 }
 494
 495 static ssize_t
 496 store_fan_min(struct device *dev, struct device_attribute *attr,
 497               const char *buf, size_t count)
 498 {
 499         struct sensor_device_attribute_2 *sensor_attr =
 500             to_sensor_dev_attr_2(attr);
 501         int index = sensor_attr->index;
 502         struct i2c_client *client = to_i2c_client(dev);
 503         struct w83793_data *data = i2c_get_clientdata(client);
 504         unsigned long val;
 505         int err;
 506
 507         err = kstrtoul(buf, 10, &val);
 508         if (err)
 509                 return err;
 510         val = FAN_TO_REG(val);
 511
 512         mutex_lock(&data->update_lock);
 513         data->fan_min[index] = val;
 514         w83793_write_value(client, W83793_REG_FAN_MIN(index),
 515                            (val >> 8) & 0xff);
 516         w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
 517         mutex_unlock(&data->update_lock);
 518
 519         return count;
 520 }
 521
 522 static ssize_t
 523 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 524 {
 525         struct sensor_device_attribute_2 *sensor_attr =
 526             to_sensor_dev_attr_2(attr);
 527         struct w83793_data *data = w83793_update_device(dev);
 528         u16 val;
 529         int nr = sensor_attr->nr;
 530         int index = sensor_attr->index;
 531
 532         if (nr == PWM_STOP_TIME)
 533                 val = TIME_FROM_REG(data->pwm_stop_time[index]);
 534         else
 535                 val = (data->pwm[index][nr] & 0x3f) << 2;
 536
 537         return sprintf(buf, "%d\n", val);
 538 }
 539
 540 static ssize_t
 541 store_pwm(struct device *dev, struct device_attribute *attr,
 542           const char *buf, size_t count)
 543 {
 544         struct i2c_client *client = to_i2c_client(dev);
 545         struct w83793_data *data = i2c_get_clientdata(client);
 546         struct sensor_device_attribute_2 *sensor_attr =
 547             to_sensor_dev_attr_2(attr);
 548         int nr = sensor_attr->nr;
 549         int index = sensor_attr->index;
 550         unsigned long val;
 551         int err;
 552
 553         err = kstrtoul(buf, 10, &val);
 554         if (err)
 555                 return err;
 556
 557         mutex_lock(&data->update_lock);
 558         if (nr == PWM_STOP_TIME) {
 559                 val = TIME_TO_REG(val);
 560                 data->pwm_stop_time[index] = val;
 561                 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
 562                                    val);
 563         } else {
 564                 val = clamp_val(val, 0, 0xff) >> 2;
 565                 data->pwm[index][nr] =
 566                     w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
 567                 data->pwm[index][nr] |= val;
 568                 w83793_write_value(client, W83793_REG_PWM(index, nr),
 569                                                         data->pwm[index][nr]);
 570         }
 571
 572         mutex_unlock(&data->update_lock);
 573         return count;
 574 }
 575
 576 static ssize_t
 577 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 578 {
 579         struct sensor_device_attribute_2 *sensor_attr =
 580             to_sensor_dev_attr_2(attr);
 581         int nr = sensor_attr->nr;
 582         int index = sensor_attr->index;
 583         struct w83793_data *data = w83793_update_device(dev);
 584         long temp = TEMP_FROM_REG(data->temp[index][nr]);
 585
 586         if (nr == TEMP_READ && index < 4) {     /* Only TD1-TD4 have low bits */
 587                 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
 588                 temp += temp > 0 ? low : -low;
 589         }
 590         return sprintf(buf, "%ld\n", temp);
 591 }
 592
 593 static ssize_t
 594 store_temp(struct device *dev, struct device_attribute *attr,
 595            const char *buf, size_t count)
 596 {
 597         struct sensor_device_attribute_2 *sensor_attr =
 598             to_sensor_dev_attr_2(attr);
 599         int nr = sensor_attr->nr;
 600         int index = sensor_attr->index;
 601         struct i2c_client *client = to_i2c_client(dev);
 602         struct w83793_data *data = i2c_get_clientdata(client);
 603         long tmp;
 604         int err;
 605
 606         err = kstrtol(buf, 10, &tmp);
 607         if (err)
 608                 return err;
 609
 610         mutex_lock(&data->update_lock);
 611         data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
 612         w83793_write_value(client, W83793_REG_TEMP[index][nr],
 613                            data->temp[index][nr]);
 614         mutex_unlock(&data->update_lock);
 615         return count;
 616 }
 617
 618 /*
 619  * TD1-TD4
 620  * each has 4 mode:(2 bits)
 621  * 0:   Stop monitor
 622  * 1:   Use internal temp sensor(default)
 623  * 2:   Reserved
 624  * 3:   Use sensor in Intel CPU and get result by PECI
 625  *
 626  * TR1-TR2
 627  * each has 2 mode:(1 bit)
 628  * 0:   Disable temp sensor monitor
 629  * 1:   To enable temp sensors monitor
 630  */
 631
 632 /* 0 disable, 6 PECI */
 633 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
 634
 635 static ssize_t
 636 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
 637 {
 638         struct w83793_data *data = w83793_update_device(dev);
 639         struct sensor_device_attribute_2 *sensor_attr =
 640             to_sensor_dev_attr_2(attr);
 641         int index = sensor_attr->index;
 642         u8 mask = (index < 4) ? 0x03 : 0x01;
 643         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 644         u8 tmp;
 645         index = (index < 4) ? 0 : 1;
 646
 647         tmp = (data->temp_mode[index] >> shift) & mask;
 648
 649         /* for the internal sensor, found out if diode or thermistor */
 650         if (tmp == 1)
 651                 tmp = index == 0 ? 3 : 4;
 652         else
 653                 tmp = TO_TEMP_MODE[tmp];
 654
 655         return sprintf(buf, "%d\n", tmp);
 656 }
 657
 658 static ssize_t
 659 store_temp_mode(struct device *dev, struct device_attribute *attr,
 660                 const char *buf, size_t count)
 661 {
 662         struct i2c_client *client = to_i2c_client(dev);
 663         struct w83793_data *data = i2c_get_clientdata(client);
 664         struct sensor_device_attribute_2 *sensor_attr =
 665             to_sensor_dev_attr_2(attr);
 666         int index = sensor_attr->index;
 667         u8 mask = (index < 4) ? 0x03 : 0x01;
 668         u8 shift = (index < 4) ? (2 * index) : (index - 4);
 669         unsigned long val;
 670         int err;
 671
 672         err = kstrtoul(buf, 10, &val);
 673         if (err)
 674                 return err;
 675
 676         /* transform the sysfs interface values into table above */
 677         if ((val == 6) && (index < 4)) {
 678                 val -= 3;
 679         } else if ((val == 3 && index < 4)
 680                 || (val == 4 && index >= 4)) {
 681                 /* transform diode or thermistor into internal enable */
 682                 val = !!val;
 683         } else {
 684                 return -EINVAL;
 685         }
 686
 687         index = (index < 4) ? 0 : 1;
 688         mutex_lock(&data->update_lock);
 689         data->temp_mode[index] =
 690             w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
 691         data->temp_mode[index] &= ~(mask << shift);
 692         data->temp_mode[index] |= val << shift;
 693         w83793_write_value(client, W83793_REG_TEMP_MODE[index],
 694                                                         data->temp_mode[index]);
 695         mutex_unlock(&data->update_lock);
 696
 697         return count;
 698 }
 699
 700 #define SETUP_PWM_DEFAULT               0
 701 #define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
 702 #define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
 703 #define SETUP_TEMP_CRITICAL             3
 704 static ssize_t
 705 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
 706 {
 707         struct sensor_device_attribute_2 *sensor_attr =
 708             to_sensor_dev_attr_2(attr);
 709         int nr = sensor_attr->nr;
 710         struct w83793_data *data = w83793_update_device(dev);
 711         u32 val = 0;
 712
 713         if (nr == SETUP_PWM_DEFAULT)
 714                 val = (data->pwm_default & 0x3f) << 2;
 715         else if (nr == SETUP_PWM_UPTIME)
 716                 val = TIME_FROM_REG(data->pwm_uptime);
 717         else if (nr == SETUP_PWM_DOWNTIME)
 718                 val = TIME_FROM_REG(data->pwm_downtime);
 719         else if (nr == SETUP_TEMP_CRITICAL)
 720                 val = TEMP_FROM_REG(data->temp_critical & 0x7f);
 721
 722         return sprintf(buf, "%d\n", val);
 723 }
 724
 725 static ssize_t
 726 store_sf_setup(struct device *dev, struct device_attribute *attr,
 727                const char *buf, size_t count)
 728 {
 729         struct sensor_device_attribute_2 *sensor_attr =
 730             to_sensor_dev_attr_2(attr);
 731         int nr = sensor_attr->nr;
 732         struct i2c_client *client = to_i2c_client(dev);
 733         struct w83793_data *data = i2c_get_clientdata(client);
 734         long val;
 735         int err;
 736
 737         err = kstrtol(buf, 10, &val);
 738         if (err)
 739                 return err;
 740
 741         mutex_lock(&data->update_lock);
 742         if (nr == SETUP_PWM_DEFAULT) {
 743                 data->pwm_default =
 744                     w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
 745                 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
 746                 w83793_write_value(client, W83793_REG_PWM_DEFAULT,
 747                                                         data->pwm_default);
 748         } else if (nr == SETUP_PWM_UPTIME) {
 749                 data->pwm_uptime = TIME_TO_REG(val);
 750                 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
 751                 w83793_write_value(client, W83793_REG_PWM_UPTIME,
 752                                                         data->pwm_uptime);
 753         } else if (nr == SETUP_PWM_DOWNTIME) {
 754                 data->pwm_downtime = TIME_TO_REG(val);
 755                 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
 756                 w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
 757                                                         data->pwm_downtime);
 758         } else {                /* SETUP_TEMP_CRITICAL */
 759                 data->temp_critical =
 760                     w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
 761                 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
 762                 w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
 763                                                         data->temp_critical);
 764         }
 765
 766         mutex_unlock(&data->update_lock);
 767         return count;
 768 }
 769
 770 /*
 771  * Temp SmartFan control
 772  * TEMP_FAN_MAP
 773  * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
 774  * It's possible two or more temp channels control the same fan, w83793
 775  * always prefers to pick the most critical request and applies it to
 776  * the related Fan.
 777  * It's possible one fan is not in any mapping of 6 temp channels, this
 778  * means the fan is manual mode
 779  *
 780  * TEMP_PWM_ENABLE
 781  * Each temp channel has its own SmartFan mode, and temp channel
 782  * control fans that are set by TEMP_FAN_MAP
 783  * 0:   SmartFanII mode
 784  * 1:   Thermal Cruise Mode
 785  *
 786  * TEMP_CRUISE
 787  * Target temperature in thermal cruise mode, w83793 will try to turn
 788  * fan speed to keep the temperature of target device around this
 789  * temperature.
 790  *
 791  * TEMP_TOLERANCE
 792  * If Temp higher or lower than target with this tolerance, w83793
 793  * will take actions to speed up or slow down the fan to keep the
 794  * temperature within the tolerance range.
 795  */
 796
 797 #define TEMP_FAN_MAP                    0
 798 #define TEMP_PWM_ENABLE                 1
 799 #define TEMP_CRUISE                     2
 800 #define TEMP_TOLERANCE                  3
 801 static ssize_t
 802 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
 803 {
 804         struct sensor_device_attribute_2 *sensor_attr =
 805             to_sensor_dev_attr_2(attr);
 806         int nr = sensor_attr->nr;
 807         int index = sensor_attr->index;
 808         struct w83793_data *data = w83793_update_device(dev);
 809         u32 val;
 810
 811         if (nr == TEMP_FAN_MAP) {
 812                 val = data->temp_fan_map[index];
 813         } else if (nr == TEMP_PWM_ENABLE) {
 814                 /* +2 to transform into 2 and 3 to conform with sysfs intf */
 815                 val = ((data->pwm_enable >> index) & 0x01) + 2;
 816         } else if (nr == TEMP_CRUISE) {
 817                 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
 818         } else {                /* TEMP_TOLERANCE */
 819                 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
 820                 val = TEMP_FROM_REG(val & 0x0f);
 821         }
 822         return sprintf(buf, "%d\n", val);
 823 }
 824
 825 static ssize_t
 826 store_sf_ctrl(struct device *dev, struct device_attribute *attr,
 827               const char *buf, size_t count)
 828 {
 829         struct sensor_device_attribute_2 *sensor_attr =
 830             to_sensor_dev_attr_2(attr);
 831         int nr = sensor_attr->nr;
 832         int index = sensor_attr->index;
 833         struct i2c_client *client = to_i2c_client(dev);
 834         struct w83793_data *data = i2c_get_clientdata(client);
 835         long val;
 836         int err;
 837
 838         err = kstrtol(buf, 10, &val);
 839         if (err)
 840                 return err;
 841
 842         mutex_lock(&data->update_lock);
 843         if (nr == TEMP_FAN_MAP) {
 844                 val = clamp_val(val, 0, 255);
 845                 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
 846                 data->temp_fan_map[index] = val;
 847         } else if (nr == TEMP_PWM_ENABLE) {
 848                 if (val == 2 || val == 3) {
 849                         data->pwm_enable =
 850                             w83793_read_value(client, W83793_REG_PWM_ENABLE);
 851                         if (val - 2)
 852                                 data->pwm_enable |= 1 << index;
 853                         else
 854                                 data->pwm_enable &= ~(1 << index);
 855                         w83793_write_value(client, W83793_REG_PWM_ENABLE,
 856                                                         data->pwm_enable);
 857                 } else {
 858                         mutex_unlock(&data->update_lock);
 859                         return -EINVAL;
 860                 }
 861         } else if (nr == TEMP_CRUISE) {
 862                 data->temp_cruise[index] =
 863                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
 864                 data->temp_cruise[index] &= 0x80;
 865                 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
 866
 867                 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
 868                                                 data->temp_cruise[index]);
 869         } else {                /* TEMP_TOLERANCE */
 870                 int i = index >> 1;
 871                 u8 shift = (index & 0x01) ? 4 : 0;
 872                 data->tolerance[i] =
 873                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
 874
 875                 data->tolerance[i] &= ~(0x0f << shift);
 876                 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
 877                 w83793_write_value(client, W83793_REG_TEMP_TOL(i),
 878                                                         data->tolerance[i]);
 879         }
 880
 881         mutex_unlock(&data->update_lock);
 882         return count;
 883 }
 884
 885 static ssize_t
 886 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 887 {
 888         struct sensor_device_attribute_2 *sensor_attr =
 889             to_sensor_dev_attr_2(attr);
 890         int nr = sensor_attr->nr;
 891         int index = sensor_attr->index;
 892         struct w83793_data *data = w83793_update_device(dev);
 893
 894         return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
 895 }
 896
 897 static ssize_t
 898 store_sf2_pwm(struct device *dev, struct device_attribute *attr,
 899               const char *buf, size_t count)
 900 {
 901         struct i2c_client *client = to_i2c_client(dev);
 902         struct w83793_data *data = i2c_get_clientdata(client);
 903         struct sensor_device_attribute_2 *sensor_attr =
 904             to_sensor_dev_attr_2(attr);
 905         int nr = sensor_attr->nr;
 906         int index = sensor_attr->index;
 907         unsigned long val;
 908         int err;
 909
 910         err = kstrtoul(buf, 10, &val);
 911         if (err)
 912                 return err;
 913         val = clamp_val(val, 0, 0xff) >> 2;
 914
 915         mutex_lock(&data->update_lock);
 916         data->sf2_pwm[index][nr] =
 917             w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
 918         data->sf2_pwm[index][nr] |= val;
 919         w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
 920                                                 data->sf2_pwm[index][nr]);
 921         mutex_unlock(&data->update_lock);
 922         return count;
 923 }
 924
 925 static ssize_t
 926 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
 927 {
 928         struct sensor_device_attribute_2 *sensor_attr =
 929             to_sensor_dev_attr_2(attr);
 930         int nr = sensor_attr->nr;
 931         int index = sensor_attr->index;
 932         struct w83793_data *data = w83793_update_device(dev);
 933
 934         return sprintf(buf, "%ld\n",
 935                        TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
 936 }
 937
 938 static ssize_t
 939 store_sf2_temp(struct device *dev, struct device_attribute *attr,
 940                const char *buf, size_t count)
 941 {
 942         struct i2c_client *client = to_i2c_client(dev);
 943         struct w83793_data *data = i2c_get_clientdata(client);
 944         struct sensor_device_attribute_2 *sensor_attr =
 945             to_sensor_dev_attr_2(attr);
 946         int nr = sensor_attr->nr;
 947         int index = sensor_attr->index;
 948         long val;
 949         int err;
 950
 951         err = kstrtol(buf, 10, &val);
 952         if (err)
 953                 return err;
 954         val = TEMP_TO_REG(val, 0, 0x7f);
 955
 956         mutex_lock(&data->update_lock);
 957         data->sf2_temp[index][nr] =
 958             w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
 959         data->sf2_temp[index][nr] |= val;
 960         w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
 961                                              data->sf2_temp[index][nr]);
 962         mutex_unlock(&data->update_lock);
 963         return count;
 964 }
 965
 966 /* only Vcore A/B and Vtt have additional 2 bits precision */
 967 static ssize_t
 968 show_in(struct device *dev, struct device_attribute *attr, char *buf)
 969 {
 970         struct sensor_device_attribute_2 *sensor_attr =
 971             to_sensor_dev_attr_2(attr);
 972         int nr = sensor_attr->nr;
 973         int index = sensor_attr->index;
 974         struct w83793_data *data = w83793_update_device(dev);
 975         u16 val = data->in[index][nr];
 976
 977         if (index < 3) {
 978                 val <<= 2;
 979                 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
 980         }
 981         /* voltage inputs 5VDD and 5VSB needs 150mV offset */
 982         val = val * scale_in[index] + scale_in_add[index];
 983         return sprintf(buf, "%d\n", val);
 984 }
 985
 986 static ssize_t
 987 store_in(struct device *dev, struct device_attribute *attr,
 988          const char *buf, size_t count)
 989 {
 990         struct sensor_device_attribute_2 *sensor_attr =
 991             to_sensor_dev_attr_2(attr);
 992         int nr = sensor_attr->nr;
 993         int index = sensor_attr->index;
 994         struct i2c_client *client = to_i2c_client(dev);
 995         struct w83793_data *data = i2c_get_clientdata(client);
 996         unsigned long val;
 997         int err;
 998
 999         err = kstrtoul(buf, 10, &val);
1000         if (err)
1001                 return err;
1002         val = (val + scale_in[index] / 2) / scale_in[index];
1003
1004         mutex_lock(&data->update_lock);
1005         if (index > 2) {
1006                 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
1007                 if (nr == 1 || nr == 2)
1008                         val -= scale_in_add[index] / scale_in[index];
1009                 val = clamp_val(val, 0, 255);
1010         } else {
1011                 val = clamp_val(val, 0, 0x3FF);
1012                 data->in_low_bits[nr] =
1013                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1014                 data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1015                 data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1016                 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1017                                                      data->in_low_bits[nr]);
1018                 val >>= 2;
1019         }
1020         data->in[index][nr] = val;
1021         w83793_write_value(client, W83793_REG_IN[index][nr],
1022                                                         data->in[index][nr]);
1023         mutex_unlock(&data->update_lock);
1024         return count;
1025 }
1026
1027 #define NOT_USED                        -1
1028
1029 #define SENSOR_ATTR_IN(index)                                           \
1030         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1031                 IN_READ, index),                                        \
1032         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1033                 store_in, IN_MAX, index),                               \
1034         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1035                 store_in, IN_LOW, index),                               \
1036         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1037                 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
1038         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1039                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1040                 index + ((index > 2) ? 1 : 0))
1041
1042 #define SENSOR_ATTR_FAN(index)                                          \
1043         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1044                 NULL, ALARM_STATUS, index + 17),                        \
1045         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1046                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
1047         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1048                 NULL, FAN_INPUT, index - 1),                            \
1049         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1050                 show_fan, store_fan_min, FAN_MIN, index - 1)
1051
1052 #define SENSOR_ATTR_PWM(index)                                          \
1053         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1054                 store_pwm, PWM_DUTY, index - 1),                        \
1055         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1056                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1057         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1058                 show_pwm, store_pwm, PWM_START, index - 1),             \
1059         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1060                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1061
1062 #define SENSOR_ATTR_TEMP(index)                                         \
1063         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1064                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1065         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1066                 NULL, TEMP_READ, index - 1),                            \
1067         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1068                 store_temp, TEMP_CRIT, index - 1),                      \
1069         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1070                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1071         SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1072                 store_temp, TEMP_WARN, index - 1),                      \
1073         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1074                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1075         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1076                 show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1077         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1078                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1079         SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1080                 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1081                 TEMP_FAN_MAP, index - 1),                               \
1082         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1083                 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1084                 index - 1),                                             \
1085         SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1086                 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1087         SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1088                 store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1089         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1090                 show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1091         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1092                 show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1093         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1094                 show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1095         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1096                 show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1097         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1098                 show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1099         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1100                 show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1101         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1102                 show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1103         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1104                 show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1105         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1106                 show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1107         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1108                 show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1109         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1110                 show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1111         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1112                 show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1113         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1114                 show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1115         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1116                 show_sf2_temp, store_sf2_temp, 6, index - 1)
1117
1118 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1119         SENSOR_ATTR_IN(0),
1120         SENSOR_ATTR_IN(1),
1121         SENSOR_ATTR_IN(2),
1122         SENSOR_ATTR_IN(3),
1123         SENSOR_ATTR_IN(4),
1124         SENSOR_ATTR_IN(5),
1125         SENSOR_ATTR_IN(6),
1126         SENSOR_ATTR_IN(7),
1127         SENSOR_ATTR_IN(8),
1128         SENSOR_ATTR_IN(9),
1129         SENSOR_ATTR_FAN(1),
1130         SENSOR_ATTR_FAN(2),
1131         SENSOR_ATTR_FAN(3),
1132         SENSOR_ATTR_FAN(4),
1133         SENSOR_ATTR_FAN(5),
1134         SENSOR_ATTR_PWM(1),
1135         SENSOR_ATTR_PWM(2),
1136         SENSOR_ATTR_PWM(3),
1137 };
1138
1139 static struct sensor_device_attribute_2 w83793_temp[] = {
1140         SENSOR_ATTR_TEMP(1),
1141         SENSOR_ATTR_TEMP(2),
1142         SENSOR_ATTR_TEMP(3),
1143         SENSOR_ATTR_TEMP(4),
1144         SENSOR_ATTR_TEMP(5),
1145         SENSOR_ATTR_TEMP(6),
1146 };
1147
1148 /* Fan6-Fan12 */
1149 static struct sensor_device_attribute_2 w83793_left_fan[] = {
1150         SENSOR_ATTR_FAN(6),
1151         SENSOR_ATTR_FAN(7),
1152         SENSOR_ATTR_FAN(8),
1153         SENSOR_ATTR_FAN(9),
1154         SENSOR_ATTR_FAN(10),
1155         SENSOR_ATTR_FAN(11),
1156         SENSOR_ATTR_FAN(12),
1157 };
1158
1159 /* Pwm4-Pwm8 */
1160 static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1161         SENSOR_ATTR_PWM(4),
1162         SENSOR_ATTR_PWM(5),
1163         SENSOR_ATTR_PWM(6),
1164         SENSOR_ATTR_PWM(7),
1165         SENSOR_ATTR_PWM(8),
1166 };
1167
1168 static struct sensor_device_attribute_2 w83793_vid[] = {
1169         SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1170         SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1171 };
1172 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
1173
1174 static struct sensor_device_attribute_2 sda_single_files[] = {
1175         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1176                       store_chassis_clear, ALARM_STATUS, 30),
1177         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1178                       store_beep_enable, NOT_USED, NOT_USED),
1179         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1180                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1181         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1182                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1183         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1184                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1185         SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1186                       store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1187 };
1188
1189 static void w83793_init_client(struct i2c_client *client)
1190 {
1191         if (reset)
1192                 w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1193
1194         /* Start monitoring */
1195         w83793_write_value(client, W83793_REG_CONFIG,
1196                            w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1197 }
1198
1199 /*
1200  * Watchdog routines
1201  */
1202
1203 static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1204 {
1205         unsigned int mtimeout;
1206         int ret;
1207
1208         mtimeout = DIV_ROUND_UP(timeout, 60);
1209
1210         if (mtimeout > 255)
1211                 return -EINVAL;
1212
1213         mutex_lock(&data->watchdog_lock);
1214         if (!data->client) {
1215                 ret = -ENODEV;
1216                 goto leave;
1217         }
1218
1219         data->watchdog_timeout = mtimeout;
1220
1221         /* Set Timeout value (in Minutes) */
1222         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1223                            data->watchdog_timeout);
1224
1225         ret = mtimeout * 60;
1226
1227 leave:
1228         mutex_unlock(&data->watchdog_lock);
1229         return ret;
1230 }
1231
1232 static int watchdog_get_timeout(struct w83793_data *data)
1233 {
1234         int timeout;
1235
1236         mutex_lock(&data->watchdog_lock);
1237         timeout = data->watchdog_timeout * 60;
1238         mutex_unlock(&data->watchdog_lock);
1239
1240         return timeout;
1241 }
1242
1243 static int watchdog_trigger(struct w83793_data *data)
1244 {
1245         int ret = 0;
1246
1247         mutex_lock(&data->watchdog_lock);
1248         if (!data->client) {
1249                 ret = -ENODEV;
1250                 goto leave;
1251         }
1252
1253         /* Set Timeout value (in Minutes) */
1254         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1255                            data->watchdog_timeout);
1256
1257 leave:
1258         mutex_unlock(&data->watchdog_lock);
1259         return ret;
1260 }
1261
1262 static int watchdog_enable(struct w83793_data *data)
1263 {
1264         int ret = 0;
1265
1266         mutex_lock(&data->watchdog_lock);
1267         if (!data->client) {
1268                 ret = -ENODEV;
1269                 goto leave;
1270         }
1271
1272         /* Set initial timeout */
1273         w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1274                            data->watchdog_timeout);
1275
1276         /* Enable Soft Watchdog */
1277         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1278
1279 leave:
1280         mutex_unlock(&data->watchdog_lock);
1281         return ret;
1282 }
1283
1284 static int watchdog_disable(struct w83793_data *data)
1285 {
1286         int ret = 0;
1287
1288         mutex_lock(&data->watchdog_lock);
1289         if (!data->client) {
1290                 ret = -ENODEV;
1291                 goto leave;
1292         }
1293
1294         /* Disable Soft Watchdog */
1295         w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1296
1297 leave:
1298         mutex_unlock(&data->watchdog_lock);
1299         return ret;
1300 }
1301
1302 static int watchdog_open(struct inode *inode, struct file *filp)
1303 {
1304         struct w83793_data *pos, *data = NULL;
1305         int watchdog_is_open;
1306
1307         /*
1308          * We get called from drivers/char/misc.c with misc_mtx hold, and we
1309          * call misc_register() from  w83793_probe() with watchdog_data_mutex
1310          * hold, as misc_register() takes the misc_mtx lock, this is a possible
1311          * deadlock, so we use mutex_trylock here.
1312          */
1313         if (!mutex_trylock(&watchdog_data_mutex))
1314                 return -ERESTARTSYS;
1315         list_for_each_entry(pos, &watchdog_data_list, list) {
1316                 if (pos->watchdog_miscdev.minor == iminor(inode)) {
1317                         data = pos;
1318                         break;
1319                 }
1320         }
1321
1322         /* Check, if device is already open */
1323         watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1324
1325         /*
1326          * Increase data reference counter (if not already done).
1327          * Note we can never not have found data, so we don't check for this
1328          */
1329         if (!watchdog_is_open)
1330                 kref_get(&data->kref);
1331
1332         mutex_unlock(&watchdog_data_mutex);
1333
1334         /* Check, if device is already open and possibly issue error */
1335         if (watchdog_is_open)
1336                 return -EBUSY;
1337
1338         /* Enable Soft Watchdog */
1339         watchdog_enable(data);
1340
1341         /* Store pointer to data into filp's private data */
1342         filp->private_data = data;
1343
1344         return nonseekable_open(inode, filp);
1345 }
1346
1347 static int watchdog_close(struct inode *inode, struct file *filp)
1348 {
1349         struct w83793_data *data = filp->private_data;
1350
1351         if (data->watchdog_expect_close) {
1352                 watchdog_disable(data);
1353                 data->watchdog_expect_close = 0;
1354         } else {
1355                 watchdog_trigger(data);
1356                 dev_crit(&data->client->dev,
1357                         "unexpected close, not stopping watchdog!\n");
1358         }
1359
1360         clear_bit(0, &data->watchdog_is_open);
1361
1362         /* Decrease data reference counter */
1363         mutex_lock(&watchdog_data_mutex);
1364         kref_put(&data->kref, w83793_release_resources);
1365         mutex_unlock(&watchdog_data_mutex);
1366
1367         return 0;
1368 }
1369
1370 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1371         size_t count, loff_t *offset)
1372 {
1373         ssize_t ret;
1374         struct w83793_data *data = filp->private_data;
1375
1376         if (count) {
1377                 if (!nowayout) {
1378                         size_t i;
1379
1380                         /* Clear it in case it was set with a previous write */
1381                         data->watchdog_expect_close = 0;
1382
1383                         for (i = 0; i != count; i++) {
1384                                 char c;
1385                                 if (get_user(c, buf + i))
1386                                         return -EFAULT;
1387                                 if (c == 'V')
1388                                         data->watchdog_expect_close = 1;
1389                         }
1390                 }
1391                 ret = watchdog_trigger(data);
1392                 if (ret < 0)
1393                         return ret;
1394         }
1395         return count;
1396 }
1397
1398 static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1399                            unsigned long arg)
1400 {
1401         struct watchdog_info ident = {
1402                 .options = WDIOF_KEEPALIVEPING |
1403                            WDIOF_SETTIMEOUT |
1404                            WDIOF_CARDRESET,
1405                 .identity = "w83793 watchdog"
1406         };
1407
1408         int val, ret = 0;
1409         struct w83793_data *data = filp->private_data;
1410
1411         switch (cmd) {
1412         case WDIOC_GETSUPPORT:
1413                 if (!nowayout)
1414                         ident.options |= WDIOF_MAGICCLOSE;
1415                 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1416                         ret = -EFAULT;
1417                 break;
1418
1419         case WDIOC_GETSTATUS:
1420                 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1421                 ret = put_user(val, (int __user *)arg);
1422                 break;
1423
1424         case WDIOC_GETBOOTSTATUS:
1425                 ret = put_user(0, (int __user *)arg);
1426                 break;
1427
1428         case WDIOC_KEEPALIVE:
1429                 ret = watchdog_trigger(data);
1430                 break;
1431
1432         case WDIOC_GETTIMEOUT:
1433                 val = watchdog_get_timeout(data);
1434                 ret = put_user(val, (int __user *)arg);
1435                 break;
1436
1437         case WDIOC_SETTIMEOUT:
1438                 if (get_user(val, (int __user *)arg)) {
1439                         ret = -EFAULT;
1440                         break;
1441                 }
1442                 ret = watchdog_set_timeout(data, val);
1443                 if (ret > 0)
1444                         ret = put_user(ret, (int __user *)arg);
1445                 break;
1446
1447         case WDIOC_SETOPTIONS:
1448                 if (get_user(val, (int __user *)arg)) {
1449                         ret = -EFAULT;
1450                         break;
1451                 }
1452
1453                 if (val & WDIOS_DISABLECARD)
1454                         ret = watchdog_disable(data);
1455                 else if (val & WDIOS_ENABLECARD)
1456                         ret = watchdog_enable(data);
1457                 else
1458                         ret = -EINVAL;
1459
1460                 break;
1461         default:
1462                 ret = -ENOTTY;
1463         }
1464         return ret;
1465 }
1466
1467 static const struct file_operations watchdog_fops = {
1468         .owner = THIS_MODULE,
1469         .llseek = no_llseek,
1470         .open = watchdog_open,
1471         .release = watchdog_close,
1472         .write = watchdog_write,
1473         .unlocked_ioctl = watchdog_ioctl,
1474 };
1475
1476 /*
1477  *      Notifier for system down
1478  */
1479
1480 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1481                                void *unused)
1482 {
1483         struct w83793_data *data = NULL;
1484
1485         if (code == SYS_DOWN || code == SYS_HALT) {
1486
1487                 /* Disable each registered watchdog */
1488                 mutex_lock(&watchdog_data_mutex);
1489                 list_for_each_entry(data, &watchdog_data_list, list) {
1490                         if (data->watchdog_miscdev.minor)
1491                                 watchdog_disable(data);
1492                 }
1493                 mutex_unlock(&watchdog_data_mutex);
1494         }
1495
1496         return NOTIFY_DONE;
1497 }
1498
1499 /*
1500  *      The WDT needs to learn about soft shutdowns in order to
1501  *      turn the timebomb registers off.
1502  */
1503
1504 static struct notifier_block watchdog_notifier = {
1505         .notifier_call = watchdog_notify_sys,
1506 };
1507
1508 /*
1509  * Init / remove routines
1510  */
1511
1512 static int w83793_remove(struct i2c_client *client)
1513 {
1514         struct w83793_data *data = i2c_get_clientdata(client);
1515         struct device *dev = &client->dev;
1516         int i, tmp;
1517
1518         /* Unregister the watchdog (if registered) */
1519         if (data->watchdog_miscdev.minor) {
1520                 misc_deregister(&data->watchdog_miscdev);
1521
1522                 if (data->watchdog_is_open) {
1523                         dev_warn(&client->dev,
1524                                 "i2c client detached with watchdog open! "
1525                                 "Stopping watchdog.\n");
1526                         watchdog_disable(data);
1527                 }
1528
1529                 mutex_lock(&watchdog_data_mutex);
1530                 list_del(&data->list);
1531                 mutex_unlock(&watchdog_data_mutex);
1532
1533                 /* Tell the watchdog code the client is gone */
1534                 mutex_lock(&data->watchdog_lock);
1535                 data->client = NULL;
1536                 mutex_unlock(&data->watchdog_lock);
1537         }
1538
1539         /* Reset Configuration Register to Disable Watch Dog Registers */
1540         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1541         w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1542
1543         unregister_reboot_notifier(&watchdog_notifier);
1544
1545         hwmon_device_unregister(data->hwmon_dev);
1546
1547         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1548                 device_remove_file(dev,
1549                                    &w83793_sensor_attr_2[i].dev_attr);
1550
1551         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1552                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1553
1554         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1555                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1556         device_remove_file(dev, &dev_attr_vrm);
1557
1558         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1559                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1560
1561         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1562                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1563
1564         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1565                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1566
1567         if (data->lm75[0] != NULL)
1568                 i2c_unregister_device(data->lm75[0]);
1569         if (data->lm75[1] != NULL)
1570                 i2c_unregister_device(data->lm75[1]);
1571
1572         /* Decrease data reference counter */
1573         mutex_lock(&watchdog_data_mutex);
1574         kref_put(&data->kref, w83793_release_resources);
1575         mutex_unlock(&watchdog_data_mutex);
1576
1577         return 0;
1578 }
1579
1580 static int
1581 w83793_detect_subclients(struct i2c_client *client)
1582 {
1583         int i, id, err;
1584         int address = client->addr;
1585         u8 tmp;
1586         struct i2c_adapter *adapter = client->adapter;
1587         struct w83793_data *data = i2c_get_clientdata(client);
1588
1589         id = i2c_adapter_id(adapter);
1590         if (force_subclients[0] == id && force_subclients[1] == address) {
1591                 for (i = 2; i <= 3; i++) {
1592                         if (force_subclients[i] < 0x48
1593                             || force_subclients[i] > 0x4f) {
1594                                 dev_err(&client->dev,
1595                                         "invalid subclient "
1596                                         "address %d; must be 0x48-0x4f\n",
1597                                         force_subclients[i]);
1598                                 err = -EINVAL;
1599                                 goto ERROR_SC_0;
1600                         }
1601                 }
1602                 w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1603                                    (force_subclients[2] & 0x07) |
1604                                    ((force_subclients[3] & 0x07) << 4));
1605         }
1606
1607         tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1608         if (!(tmp & 0x08))
1609                 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1610         if (!(tmp & 0x80)) {
1611                 if ((data->lm75[0] != NULL)
1612                     && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1613                         dev_err(&client->dev,
1614                                 "duplicate addresses 0x%x, "
1615                                 "use force_subclients\n", data->lm75[0]->addr);
1616                         err = -ENODEV;
1617                         goto ERROR_SC_1;
1618                 }
1619                 data->lm75[1] = i2c_new_dummy(adapter,
1620                                               0x48 + ((tmp >> 4) & 0x7));
1621         }
1622
1623         return 0;
1624
1625         /* Undo inits in case of errors */
1626
1627 ERROR_SC_1:
1628         if (data->lm75[0] != NULL)
1629                 i2c_unregister_device(data->lm75[0]);
1630 ERROR_SC_0:
1631         return err;
1632 }
1633
1634 /* Return 0 if detection is successful, -ENODEV otherwise */
1635 static int w83793_detect(struct i2c_client *client,
1636                          struct i2c_board_info *info)
1637 {
1638         u8 tmp, bank, chip_id;
1639         struct i2c_adapter *adapter = client->adapter;
1640         unsigned short address = client->addr;
1641
1642         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1643                 return -ENODEV;
1644
1645         bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1646
1647         tmp = bank & 0x80 ? 0x5c : 0xa3;
1648         /* Check Winbond vendor ID */
1649         if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1650                 pr_debug("w83793: Detection failed at check vendor id\n");
1651                 return -ENODEV;
1652         }
1653
1654         /*
1655          * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1656          * should match
1657          */
1658         if ((bank & 0x07) == 0
1659          && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1660             (address << 1)) {
1661                 pr_debug("w83793: Detection failed at check i2c addr\n");
1662                 return -ENODEV;
1663         }
1664
1665         /* Determine the chip type now */
1666         chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1667         if (chip_id != 0x7b)
1668                 return -ENODEV;
1669
1670         strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1671
1672         return 0;
1673 }
1674
1675 static int w83793_probe(struct i2c_client *client,
1676                         const struct i2c_device_id *id)
1677 {
1678         struct device *dev = &client->dev;
1679         const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1680         struct w83793_data *data;
1681         int i, tmp, val, err;
1682         int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1683         int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1684         int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1685
1686         data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1687         if (!data) {
1688                 err = -ENOMEM;
1689                 goto exit;
1690         }
1691
1692         i2c_set_clientdata(client, data);
1693         data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1694         mutex_init(&data->update_lock);
1695         mutex_init(&data->watchdog_lock);
1696         INIT_LIST_HEAD(&data->list);
1697         kref_init(&data->kref);
1698
1699         /*
1700          * Store client pointer in our data struct for watchdog usage
1701          * (where the client is found through a data ptr instead of the
1702          * otherway around)
1703          */
1704         data->client = client;
1705
1706         err = w83793_detect_subclients(client);
1707         if (err)
1708                 goto free_mem;
1709
1710         /* Initialize the chip */
1711         w83793_init_client(client);
1712
1713         /*
1714          * Only fan 1-5 has their own input pins,
1715          * Pwm 1-3 has their own pins
1716          */
1717         data->has_fan = 0x1f;
1718         data->has_pwm = 0x07;
1719         tmp = w83793_read_value(client, W83793_REG_MFC);
1720         val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1721
1722         /* check the function of pins 49-56 */
1723         if (tmp & 0x80) {
1724                 data->has_vid |= 0x2;   /* has VIDB */
1725         } else {
1726                 data->has_pwm |= 0x18;  /* pwm 4,5 */
1727                 if (val & 0x01) {       /* fan 6 */
1728                         data->has_fan |= 0x20;
1729                         data->has_pwm |= 0x20;
1730                 }
1731                 if (val & 0x02) {       /* fan 7 */
1732                         data->has_fan |= 0x40;
1733                         data->has_pwm |= 0x40;
1734                 }
1735                 if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1736                         data->has_fan |= 0x80;
1737                         data->has_pwm |= 0x80;
1738                 }
1739         }
1740
1741         /* check the function of pins 37-40 */
1742         if (!(tmp & 0x29))
1743                 data->has_vid |= 0x1;   /* has VIDA */
1744         if (0x08 == (tmp & 0x0c)) {
1745                 if (val & 0x08) /* fan 9 */
1746                         data->has_fan |= 0x100;
1747                 if (val & 0x10) /* fan 10 */
1748                         data->has_fan |= 0x200;
1749         }
1750         if (0x20 == (tmp & 0x30)) {
1751                 if (val & 0x20) /* fan 11 */
1752                         data->has_fan |= 0x400;
1753                 if (val & 0x40) /* fan 12 */
1754                         data->has_fan |= 0x800;
1755         }
1756
1757         if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1758                 data->has_fan |= 0x80;
1759                 data->has_pwm |= 0x80;
1760         }
1761
1762         tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1763         if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1764                 data->has_fan |= 0x100;
1765         }
1766         if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1767                 data->has_fan |= 0x200;
1768         }
1769         if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1770                 data->has_fan |= 0x400;
1771         }
1772         if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1773                 data->has_fan |= 0x800;
1774         }
1775
1776         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1777         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1778         if (tmp & 0x01)
1779                 data->has_temp |= 0x01;
1780         if (tmp & 0x04)
1781                 data->has_temp |= 0x02;
1782         if (tmp & 0x10)
1783                 data->has_temp |= 0x04;
1784         if (tmp & 0x40)
1785                 data->has_temp |= 0x08;
1786
1787         tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1788         if (tmp & 0x01)
1789                 data->has_temp |= 0x10;
1790         if (tmp & 0x02)
1791                 data->has_temp |= 0x20;
1792
1793         /* Register sysfs hooks */
1794         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1795                 err = device_create_file(dev,
1796                                          &w83793_sensor_attr_2[i].dev_attr);
1797                 if (err)
1798                         goto exit_remove;
1799         }
1800
1801         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1802                 if (!(data->has_vid & (1 << i)))
1803                         continue;
1804                 err = device_create_file(dev, &w83793_vid[i].dev_attr);
1805                 if (err)
1806                         goto exit_remove;
1807         }
1808         if (data->has_vid) {
1809                 data->vrm = vid_which_vrm();
1810                 err = device_create_file(dev, &dev_attr_vrm);
1811                 if (err)
1812                         goto exit_remove;
1813         }
1814
1815         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1816                 err = device_create_file(dev, &sda_single_files[i].dev_attr);
1817                 if (err)
1818                         goto exit_remove;
1819
1820         }
1821
1822         for (i = 0; i < 6; i++) {
1823                 int j;
1824                 if (!(data->has_temp & (1 << i)))
1825                         continue;
1826                 for (j = 0; j < files_temp; j++) {
1827                         err = device_create_file(dev,
1828                                                 &w83793_temp[(i) * files_temp
1829                                                                 + j].dev_attr);
1830                         if (err)
1831                                 goto exit_remove;
1832                 }
1833         }
1834
1835         for (i = 5; i < 12; i++) {
1836                 int j;
1837                 if (!(data->has_fan & (1 << i)))
1838                         continue;
1839                 for (j = 0; j < files_fan; j++) {
1840                         err = device_create_file(dev,
1841                                            &w83793_left_fan[(i - 5) * files_fan
1842                                                                 + j].dev_attr);
1843                         if (err)
1844                                 goto exit_remove;
1845                 }
1846         }
1847
1848         for (i = 3; i < 8; i++) {
1849                 int j;
1850                 if (!(data->has_pwm & (1 << i)))
1851                         continue;
1852                 for (j = 0; j < files_pwm; j++) {
1853                         err = device_create_file(dev,
1854                                            &w83793_left_pwm[(i - 3) * files_pwm
1855                                                                 + j].dev_attr);
1856                         if (err)
1857                                 goto exit_remove;
1858                 }
1859         }
1860
1861         data->hwmon_dev = hwmon_device_register(dev);
1862         if (IS_ERR(data->hwmon_dev)) {
1863                 err = PTR_ERR(data->hwmon_dev);
1864                 goto exit_remove;
1865         }
1866
1867         /* Watchdog initialization */
1868
1869         /* Register boot notifier */
1870         err = register_reboot_notifier(&watchdog_notifier);
1871         if (err != 0) {
1872                 dev_err(&client->dev,
1873                         "cannot register reboot notifier (err=%d)\n", err);
1874                 goto exit_devunreg;
1875         }
1876
1877         /*
1878          * Enable Watchdog registers.
1879          * Set Configuration Register to Enable Watch Dog Registers
1880          * (Bit 2) = XXXX, X1XX.
1881          */
1882         tmp = w83793_read_value(client, W83793_REG_CONFIG);
1883         w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1884
1885         /* Set the default watchdog timeout */
1886         data->watchdog_timeout = timeout;
1887
1888         /* Check, if last reboot was caused by watchdog */
1889         data->watchdog_caused_reboot =
1890           w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1891
1892         /* Disable Soft Watchdog during initialiation */
1893         watchdog_disable(data);
1894
1895         /*
1896          * We take the data_mutex lock early so that watchdog_open() cannot
1897          * run when misc_register() has completed, but we've not yet added
1898          * our data to the watchdog_data_list (and set the default timeout)
1899          */
1900         mutex_lock(&watchdog_data_mutex);
1901         for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1902                 /* Register our watchdog part */
1903                 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1904                         "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1905                 data->watchdog_miscdev.name = data->watchdog_name;
1906                 data->watchdog_miscdev.fops = &watchdog_fops;
1907                 data->watchdog_miscdev.minor = watchdog_minors[i];
1908
1909                 err = misc_register(&data->watchdog_miscdev);
1910                 if (err == -EBUSY)
1911                         continue;
1912                 if (err) {
1913                         data->watchdog_miscdev.minor = 0;
1914                         dev_err(&client->dev,
1915                                 "Registering watchdog chardev: %d\n", err);
1916                         break;
1917                 }
1918
1919                 list_add(&data->list, &watchdog_data_list);
1920
1921                 dev_info(&client->dev,
1922                         "Registered watchdog chardev major 10, minor: %d\n",
1923                         watchdog_minors[i]);
1924                 break;
1925         }
1926         if (i == ARRAY_SIZE(watchdog_minors)) {
1927                 data->watchdog_miscdev.minor = 0;
1928                 dev_warn(&client->dev,
1929                          "Couldn't register watchdog chardev (due to no free minor)\n");
1930         }
1931
1932         mutex_unlock(&watchdog_data_mutex);
1933
1934         return 0;
1935
1936         /* Unregister hwmon device */
1937
1938 exit_devunreg:
1939
1940         hwmon_device_unregister(data->hwmon_dev);
1941
1942         /* Unregister sysfs hooks */
1943
1944 exit_remove:
1945         for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1946                 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1947
1948         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1949                 device_remove_file(dev, &sda_single_files[i].dev_attr);
1950
1951         for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1952                 device_remove_file(dev, &w83793_vid[i].dev_attr);
1953
1954         for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1955                 device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1956
1957         for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1958                 device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1959
1960         for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1961                 device_remove_file(dev, &w83793_temp[i].dev_attr);
1962
1963         if (data->lm75[0] != NULL)
1964                 i2c_unregister_device(data->lm75[0]);
1965         if (data->lm75[1] != NULL)
1966                 i2c_unregister_device(data->lm75[1]);
1967 free_mem:
1968         kfree(data);
1969 exit:
1970         return err;
1971 }
1972
1973 static void w83793_update_nonvolatile(struct device *dev)
1974 {
1975         struct i2c_client *client = to_i2c_client(dev);
1976         struct w83793_data *data = i2c_get_clientdata(client);
1977         int i, j;
1978         /*
1979          * They are somewhat "stable" registers, and to update them every time
1980          * takes so much time, it's just not worthy. Update them in a long
1981          * interval to avoid exception.
1982          */
1983         if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1984               || !data->valid))
1985                 return;
1986         /* update voltage limits */
1987         for (i = 1; i < 3; i++) {
1988                 for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1989                         data->in[j][i] =
1990                             w83793_read_value(client, W83793_REG_IN[j][i]);
1991                 }
1992                 data->in_low_bits[i] =
1993                     w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1994         }
1995
1996         for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1997                 /* Update the Fan measured value and limits */
1998                 if (!(data->has_fan & (1 << i)))
1999                         continue;
2000                 data->fan_min[i] =
2001                     w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
2002                 data->fan_min[i] |=
2003                     w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
2004         }
2005
2006         for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
2007                 if (!(data->has_temp & (1 << i)))
2008                         continue;
2009                 data->temp_fan_map[i] =
2010                     w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
2011                 for (j = 1; j < 5; j++) {
2012                         data->temp[i][j] =
2013                             w83793_read_value(client, W83793_REG_TEMP[i][j]);
2014                 }
2015                 data->temp_cruise[i] =
2016                     w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2017                 for (j = 0; j < 7; j++) {
2018                         data->sf2_pwm[i][j] =
2019                             w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2020                         data->sf2_temp[i][j] =
2021                             w83793_read_value(client,
2022                                               W83793_REG_SF2_TEMP(i, j));
2023                 }
2024         }
2025
2026         for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2027                 data->temp_mode[i] =
2028                     w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2029
2030         for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2031                 data->tolerance[i] =
2032                     w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2033         }
2034
2035         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2036                 if (!(data->has_pwm & (1 << i)))
2037                         continue;
2038                 data->pwm[i][PWM_NONSTOP] =
2039                     w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2040                 data->pwm[i][PWM_START] =
2041                     w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2042                 data->pwm_stop_time[i] =
2043                     w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2044         }
2045
2046         data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2047         data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2048         data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2049         data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2050         data->temp_critical =
2051             w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2052         data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2053
2054         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2055                 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2056
2057         data->last_nonvolatile = jiffies;
2058 }
2059
2060 static struct w83793_data *w83793_update_device(struct device *dev)
2061 {
2062         struct i2c_client *client = to_i2c_client(dev);
2063         struct w83793_data *data = i2c_get_clientdata(client);
2064         int i;
2065
2066         mutex_lock(&data->update_lock);
2067
2068         if (!(time_after(jiffies, data->last_updated + HZ * 2)
2069               || !data->valid))
2070                 goto END;
2071
2072         /* Update the voltages measured value and limits */
2073         for (i = 0; i < ARRAY_SIZE(data->in); i++)
2074                 data->in[i][IN_READ] =
2075                     w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2076
2077         data->in_low_bits[IN_READ] =
2078             w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2079
2080         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2081                 if (!(data->has_fan & (1 << i)))
2082                         continue;
2083                 data->fan[i] =
2084                     w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2085                 data->fan[i] |=
2086                     w83793_read_value(client, W83793_REG_FAN(i) + 1);
2087         }
2088
2089         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2090                 if (!(data->has_temp & (1 << i)))
2091                         continue;
2092                 data->temp[i][TEMP_READ] =
2093                     w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2094         }
2095
2096         data->temp_low_bits =
2097             w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2098
2099         for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2100                 if (data->has_pwm & (1 << i))
2101                         data->pwm[i][PWM_DUTY] =
2102                             w83793_read_value(client,
2103                                               W83793_REG_PWM(i, PWM_DUTY));
2104         }
2105
2106         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2107                 data->alarms[i] =
2108                     w83793_read_value(client, W83793_REG_ALARM(i));
2109         if (data->has_vid & 0x01)
2110                 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2111         if (data->has_vid & 0x02)
2112                 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2113         w83793_update_nonvolatile(dev);
2114         data->last_updated = jiffies;
2115         data->valid = 1;
2116
2117 END:
2118         mutex_unlock(&data->update_lock);
2119         return data;
2120 }
2121
2122 /*
2123  * Ignore the possibility that somebody change bank outside the driver
2124  * Must be called with data->update_lock held, except during initialization
2125  */
2126 static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2127 {
2128         struct w83793_data *data = i2c_get_clientdata(client);
2129         u8 res = 0xff;
2130         u8 new_bank = reg >> 8;
2131
2132         new_bank |= data->bank & 0xfc;
2133         if (data->bank != new_bank) {
2134                 if (i2c_smbus_write_byte_data
2135                     (client, W83793_REG_BANKSEL, new_bank) >= 0)
2136                         data->bank = new_bank;
2137                 else {
2138                         dev_err(&client->dev,
2139                                 "set bank to %d failed, fall back "
2140                                 "to bank %d, read reg 0x%x error\n",
2141                                 new_bank, data->bank, reg);
2142                         res = 0x0;      /* read 0x0 from the chip */
2143                         goto END;
2144                 }
2145         }
2146         res = i2c_smbus_read_byte_data(client, reg & 0xff);
2147 END:
2148         return res;
2149 }
2150
2151 /* Must be called with data->update_lock held, except during initialization */
2152 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2153 {
2154         struct w83793_data *data = i2c_get_clientdata(client);
2155         int res;
2156         u8 new_bank = reg >> 8;
2157
2158         new_bank |= data->bank & 0xfc;
2159         if (data->bank != new_bank) {
2160                 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2161                                                 new_bank);
2162                 if (res < 0) {
2163                         dev_err(&client->dev,
2164                                 "set bank to %d failed, fall back "
2165                                 "to bank %d, write reg 0x%x error\n",
2166                                 new_bank, data->bank, reg);
2167                         goto END;
2168                 }
2169                 data->bank = new_bank;
2170         }
2171
2172         res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2173 END:
2174         return res;
2175 }
2176
2177 module_i2c_driver(w83793_driver);
2178
2179 MODULE_AUTHOR("Yuan Mu, Sven Anders");
2180 MODULE_DESCRIPTION("w83793 driver");
2181 MODULE_LICENSE("GPL");