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