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