drivers/hwmon/w83795.c

   1 /*
   2  *  w83795.c - Linux kernel driver for hardware monitoring
   3  *  Copyright (C) 2008 Nuvoton Technology Corp.
   4  *                Wei Song
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation - version 2.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  *  02110-1301 USA.
  19  *
  20  *  Supports following chips:
  21  *
  22  *  Chip       #vin   #fanin #pwm #temp #dts wchipid  vendid  i2c  ISA
  23  *  w83795g     21     14     8     6     8    0x79   0x5ca3  yes   no
  24  *  w83795adg   18     14     2     6     8    0x79   0x5ca3  yes   no
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/i2c.h>
  32 #include <linux/hwmon.h>
  33 #include <linux/hwmon-sysfs.h>
  34 #include <linux/err.h>
  35 #include <linux/mutex.h>
  36 #include <linux/delay.h>
  37
  38 /* Addresses to scan */
  39 static const unsigned short normal_i2c[] = {
  40         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
  41 };
  42
  43
  44 static int reset;
  45 module_param(reset, bool, 0);
  46 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  47
  48
  49 #define W83795_REG_BANKSEL              0x00
  50 #define W83795_REG_VENDORID             0xfd
  51 #define W83795_REG_CHIPID               0xfe
  52 #define W83795_REG_DEVICEID             0xfb
  53 #define W83795_REG_DEVICEID_A           0xff
  54
  55 #define W83795_REG_I2C_ADDR             0xfc
  56 #define W83795_REG_CONFIG               0x01
  57 #define W83795_REG_CONFIG_CONFIG48      0x04
  58 #define W83795_REG_CONFIG_START 0x01
  59
  60 /* Multi-Function Pin Ctrl Registers */
  61 #define W83795_REG_VOLT_CTRL1           0x02
  62 #define W83795_REG_VOLT_CTRL2           0x03
  63 #define W83795_REG_TEMP_CTRL1           0x04
  64 #define W83795_REG_TEMP_CTRL2           0x05
  65 #define W83795_REG_FANIN_CTRL1          0x06
  66 #define W83795_REG_FANIN_CTRL2          0x07
  67 #define W83795_REG_VMIGB_CTRL           0x08
  68
  69 #define TEMP_READ                       0
  70 #define TEMP_CRIT                       1
  71 #define TEMP_CRIT_HYST                  2
  72 #define TEMP_WARN                       3
  73 #define TEMP_WARN_HYST                  4
  74 /* only crit and crit_hyst affect real-time alarm status
  75  * current crit crit_hyst warn warn_hyst */
  76 static const u16 W83795_REG_TEMP[][5] = {
  77         {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
  78         {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
  79         {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
  80         {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
  81         {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
  82         {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
  83 };
  84
  85 #define IN_READ                         0
  86 #define IN_MAX                          1
  87 #define IN_LOW                          2
  88 static const u16 W83795_REG_IN[][3] = {
  89         /* Current, HL, LL */
  90         {0x10, 0x70, 0x71},     /* VSEN1 */
  91         {0x11, 0x72, 0x73},     /* VSEN2 */
  92         {0x12, 0x74, 0x75},     /* VSEN3 */
  93         {0x13, 0x76, 0x77},     /* VSEN4 */
  94         {0x14, 0x78, 0x79},     /* VSEN5 */
  95         {0x15, 0x7a, 0x7b},     /* VSEN6 */
  96         {0x16, 0x7c, 0x7d},     /* VSEN7 */
  97         {0x17, 0x7e, 0x7f},     /* VSEN8 */
  98         {0x18, 0x80, 0x81},     /* VSEN9 */
  99         {0x19, 0x82, 0x83},     /* VSEN10 */
 100         {0x1A, 0x84, 0x85},     /* VSEN11 */
 101         {0x1B, 0x86, 0x87},     /* VTT */
 102         {0x1C, 0x88, 0x89},     /* 3VDD */
 103         {0x1D, 0x8a, 0x8b},     /* 3VSB */
 104         {0x1E, 0x8c, 0x8d},     /* VBAT */
 105         {0x1F, 0xa6, 0xa7},     /* VSEN12 */
 106         {0x20, 0xaa, 0xab},     /* VSEN13 */
 107         {0x21, 0x96, 0x97},     /* VSEN14 */
 108         {0x22, 0x9a, 0x9b},     /* VSEN15 */
 109         {0x23, 0x9e, 0x9f},     /* VSEN16 */
 110         {0x24, 0xa2, 0xa3},     /* VSEN17 */
 111 };
 112 #define W83795_REG_VRLSB                0x3C
 113
 114 static const u8 W83795_REG_IN_HL_LSB[] = {
 115         0x8e,   /* VSEN1-4 */
 116         0x90,   /* VSEN5-8 */
 117         0x92,   /* VSEN9-11 */
 118         0x94,   /* VTT, 3VDD, 3VSB, 3VBAT */
 119         0xa8,   /* VSEN12 */
 120         0xac,   /* VSEN13 */
 121         0x98,   /* VSEN14 */
 122         0x9c,   /* VSEN15 */
 123         0xa0,   /* VSEN16 */
 124         0xa4,   /* VSEN17 */
 125 };
 126
 127 #define IN_LSB_REG(index, type) \
 128         (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
 129         : (W83795_REG_IN_HL_LSB[(index)] + 1))
 130
 131 #define IN_LSB_SHIFT                    0
 132 #define IN_LSB_IDX                      1
 133 static const u8 IN_LSB_SHIFT_IDX[][2] = {
 134         /* High/Low LSB shift, LSB No. */
 135         {0x00, 0x00},   /* VSEN1 */
 136         {0x02, 0x00},   /* VSEN2 */
 137         {0x04, 0x00},   /* VSEN3 */
 138         {0x06, 0x00},   /* VSEN4 */
 139         {0x00, 0x01},   /* VSEN5 */
 140         {0x02, 0x01},   /* VSEN6 */
 141         {0x04, 0x01},   /* VSEN7 */
 142         {0x06, 0x01},   /* VSEN8 */
 143         {0x00, 0x02},   /* VSEN9 */
 144         {0x02, 0x02},   /* VSEN10 */
 145         {0x04, 0x02},   /* VSEN11 */
 146         {0x00, 0x03},   /* VTT */
 147         {0x02, 0x03},   /* 3VDD */
 148         {0x04, 0x03},   /* 3VSB */
 149         {0x06, 0x03},   /* VBAT */
 150         {0x06, 0x04},   /* VSEN12 */
 151         {0x06, 0x05},   /* VSEN13 */
 152         {0x06, 0x06},   /* VSEN14 */
 153         {0x06, 0x07},   /* VSEN15 */
 154         {0x06, 0x08},   /* VSEN16 */
 155         {0x06, 0x09},   /* VSEN17 */
 156 };
 157
 158
 159 #define W83795_REG_FAN(index)           (0x2E + (index))
 160 #define W83795_REG_FAN_MIN_HL(index)    (0xB6 + (index))
 161 #define W83795_REG_FAN_MIN_LSB(index)   (0xC4 + (index) / 2)
 162 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
 163         (((index) & 1) ? 4 : 0)
 164
 165 #define W83795_REG_VID_CTRL             0x6A
 166
 167 #define W83795_REG_ALARM(index)         (0x41 + (index))
 168 #define W83795_REG_BEEP(index)          (0x50 + (index))
 169
 170 #define W83795_REG_CLR_CHASSIS          0x4D
 171
 172
 173 #define W83795_REG_FCMS1                0x201
 174 #define W83795_REG_FCMS2                0x208
 175 #define W83795_REG_TFMR(index)          (0x202 + (index))
 176 #define W83795_REG_FOMC                 0x20F
 177
 178 #define W83795_REG_TSS(index)           (0x209 + (index))
 179
 180 #define PWM_OUTPUT                      0
 181 #define PWM_FREQ                        1
 182 #define PWM_START                       2
 183 #define PWM_NONSTOP                     3
 184 #define PWM_STOP_TIME                   4
 185 #define W83795_REG_PWM(index, nr)       (0x210 + (nr) * 8 + (index))
 186
 187 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 188 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 189 #define W83795_REG_TFTS                 0x250
 190
 191 #define TEMP_PWM_TTTI                   0
 192 #define TEMP_PWM_CTFS                   1
 193 #define TEMP_PWM_HCT                    2
 194 #define TEMP_PWM_HOT                    3
 195 #define W83795_REG_TTTI(index)          (0x260 + (index))
 196 #define W83795_REG_CTFS(index)          (0x268 + (index))
 197 #define W83795_REG_HT(index)            (0x270 + (index))
 198
 199 #define SF4_TEMP                        0
 200 #define SF4_PWM                         1
 201 #define W83795_REG_SF4_TEMP(temp_num, index) \
 202         (0x280 + 0x10 * (temp_num) + (index))
 203 #define W83795_REG_SF4_PWM(temp_num, index) \
 204         (0x288 + 0x10 * (temp_num) + (index))
 205
 206 #define W83795_REG_DTSC                 0x301
 207 #define W83795_REG_DTSE                 0x302
 208 #define W83795_REG_DTS(index)           (0x26 + (index))
 209 #define W83795_REG_PECI_TBASE(index)    (0x320 + (index))
 210
 211 #define DTS_CRIT                        0
 212 #define DTS_CRIT_HYST                   1
 213 #define DTS_WARN                        2
 214 #define DTS_WARN_HYST                   3
 215 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 216
 217 #define SETUP_PWM_DEFAULT               0
 218 #define SETUP_PWM_UPTIME                1
 219 #define SETUP_PWM_DOWNTIME              2
 220 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 221
 222 static inline u16 in_from_reg(u8 index, u16 val)
 223 {
 224         /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
 225         if (index >= 12 && index <= 14)
 226                 return val * 6;
 227         else
 228                 return val * 2;
 229 }
 230
 231 static inline u16 in_to_reg(u8 index, u16 val)
 232 {
 233         if (index >= 12 && index <= 14)
 234                 return val / 6;
 235         else
 236                 return val / 2;
 237 }
 238
 239 static inline unsigned long fan_from_reg(u16 val)
 240 {
 241         if ((val == 0xfff) || (val == 0))
 242                 return 0;
 243         return 1350000UL / val;
 244 }
 245
 246 static inline u16 fan_to_reg(long rpm)
 247 {
 248         if (rpm <= 0)
 249                 return 0x0fff;
 250         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 251 }
 252
 253 static inline unsigned long time_from_reg(u8 reg)
 254 {
 255         return reg * 100;
 256 }
 257
 258 static inline u8 time_to_reg(unsigned long val)
 259 {
 260         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 261 }
 262
 263 static inline long temp_from_reg(s8 reg)
 264 {
 265         return reg * 1000;
 266 }
 267
 268 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 269 {
 270         return SENSORS_LIMIT(val / 1000, min, max);
 271 }
 272
 273 static const u16 pwm_freq_cksel0[16] = {
 274         1024, 512, 341, 256, 205, 171, 146, 128,
 275         85, 64, 32, 16, 8, 4, 2, 1
 276 };
 277
 278 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 279 {
 280         unsigned long base_clock;
 281
 282         if (reg & 0x80) {
 283                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 284                 return base_clock / ((reg & 0x7f) + 1);
 285         } else
 286                 return pwm_freq_cksel0[reg & 0x0f];
 287 }
 288
 289 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 290 {
 291         unsigned long base_clock;
 292         u8 reg0, reg1;
 293         unsigned long best0, best1;
 294
 295         /* Best fit for cksel = 0 */
 296         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 297                 if (val > (pwm_freq_cksel0[reg0] +
 298                            pwm_freq_cksel0[reg0 + 1]) / 2)
 299                         break;
 300         }
 301         if (val < 375)  /* cksel = 1 can't beat this */
 302                 return reg0;
 303         best0 = pwm_freq_cksel0[reg0];
 304
 305         /* Best fit for cksel = 1 */
 306         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 307         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 308         best1 = base_clock / reg1;
 309         reg1 = 0x80 | (reg1 - 1);
 310
 311         /* Choose the closest one */
 312         if (abs(val - best0) > abs(val - best1))
 313                 return reg1;
 314         else
 315                 return reg0;
 316 }
 317
 318 enum chip_types {w83795g, w83795adg};
 319
 320 struct w83795_data {
 321         struct device *hwmon_dev;
 322         struct mutex update_lock;
 323         unsigned long last_updated;     /* In jiffies */
 324         enum chip_types chip_type;
 325
 326         u8 bank;
 327
 328         u32 has_in;             /* Enable monitor VIN or not */
 329         u8 has_dyn_in;          /* Only in2-0 can have this */
 330         u16 in[21][3];          /* Register value, read/high/low */
 331         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 332         u8 has_gain;            /* has gain: in17-20 * 8 */
 333
 334         u16 has_fan;            /* Enable fan14-1 or not */
 335         u16 fan[14];            /* Register value combine */
 336         u16 fan_min[14];        /* Register value combine */
 337
 338         u8 has_temp;            /* Enable monitor temp6-1 or not */
 339         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 340         u8 temp_read_vrlsb[6];
 341         u8 temp_mode;           /* Bit vector, 0 = TR, 1 = TD */
 342         u8 temp_src[3];         /* Register value */
 343
 344         u8 enable_dts;          /* Enable PECI and SB-TSI,
 345                                  * bit 0: =1 enable, =0 disable,
 346                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI */
 347         u8 has_dts;             /* Enable monitor DTS temp */
 348         s8 dts[8];              /* Register value */
 349         u8 dts_read_vrlsb[8];   /* Register value */
 350         s8 dts_ext[4];          /* Register value */
 351
 352         u8 has_pwm;             /* 795g supports 8 pwm, 795adg only supports 2,
 353                                  * no config register, only affected by chip
 354                                  * type */
 355         u8 pwm[8][5];           /* Register value, output, freq, start,
 356                                  *  non stop, stop time */
 357         u16 clkin;              /* CLKIN frequency in kHz */
 358         u8 pwm_fcms[2];         /* Register value */
 359         u8 pwm_tfmr[6];         /* Register value */
 360         u8 pwm_fomc;            /* Register value */
 361
 362         u16 target_speed[8];    /* Register value, target speed for speed
 363                                  * cruise */
 364         u8 tol_speed;           /* tolerance of target speed */
 365         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 366         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 367
 368         u8 setup_pwm[3];        /* Register value */
 369
 370         u8 alarms[6];           /* Register value */
 371         u8 beeps[6];            /* Register value */
 372
 373         char valid;
 374 };
 375
 376 /*
 377  * Hardware access
 378  * We assume that nobdody can change the bank outside the driver.
 379  */
 380
 381 /* Must be called with data->update_lock held, except during initialization */
 382 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 383 {
 384         struct w83795_data *data = i2c_get_clientdata(client);
 385         int err;
 386
 387         /* If the same bank is already set, nothing to do */
 388         if ((data->bank & 0x07) == bank)
 389                 return 0;
 390
 391         /* Change to new bank, preserve all other bits */
 392         bank |= data->bank & ~0x07;
 393         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 394         if (err < 0) {
 395                 dev_err(&client->dev,
 396                         "Failed to set bank to %d, err %d\n",
 397                         (int)bank, err);
 398                 return err;
 399         }
 400         data->bank = bank;
 401
 402         return 0;
 403 }
 404
 405 /* Must be called with data->update_lock held, except during initialization */
 406 static u8 w83795_read(struct i2c_client *client, u16 reg)
 407 {
 408         int err;
 409
 410         err = w83795_set_bank(client, reg >> 8);
 411         if (err < 0)
 412                 return 0x00;    /* Arbitrary */
 413
 414         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 415         if (err < 0) {
 416                 dev_err(&client->dev,
 417                         "Failed to read from register 0x%03x, err %d\n",
 418                         (int)reg, err);
 419                 return 0x00;    /* Arbitrary */
 420         }
 421         return err;
 422 }
 423
 424 /* Must be called with data->update_lock held, except during initialization */
 425 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 426 {
 427         int err;
 428
 429         err = w83795_set_bank(client, reg >> 8);
 430         if (err < 0)
 431                 return err;
 432
 433         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 434         if (err < 0)
 435                 dev_err(&client->dev,
 436                         "Failed to write to register 0x%03x, err %d\n",
 437                         (int)reg, err);
 438         return err;
 439 }
 440
 441 static struct w83795_data *w83795_update_device(struct device *dev)
 442 {
 443         struct i2c_client *client = to_i2c_client(dev);
 444         struct w83795_data *data = i2c_get_clientdata(client);
 445         u16 tmp;
 446         int i;
 447
 448         mutex_lock(&data->update_lock);
 449
 450         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 451               || !data->valid))
 452                 goto END;
 453
 454         /* Update the voltages value */
 455         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 456                 if (!(data->has_in & (1 << i)))
 457                         continue;
 458                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 459                 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
 460                 data->in[i][IN_READ] = tmp;
 461         }
 462
 463         /* in0-2 can have dynamic limits (W83795G only) */
 464         if (data->has_dyn_in) {
 465                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 466                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 467
 468                 for (i = 0; i < 3; i++) {
 469                         if (!(data->has_dyn_in & (1 << i)))
 470                                 continue;
 471                         data->in[i][IN_MAX] =
 472                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 473                         data->in[i][IN_LOW] =
 474                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 475                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 476                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 477                 }
 478         }
 479
 480         /* Update fan */
 481         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 482                 if (!(data->has_fan & (1 << i)))
 483                         continue;
 484                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 485                 data->fan[i] |=
 486                   (w83795_read(client, W83795_REG_VRLSB) >> 4) & 0x0F;
 487         }
 488
 489         /* Update temperature */
 490         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 491                 data->temp[i][TEMP_READ] =
 492                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 493                 data->temp_read_vrlsb[i] =
 494                         w83795_read(client, W83795_REG_VRLSB);
 495         }
 496
 497         /* Update dts temperature */
 498         if (data->enable_dts != 0) {
 499                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 500                         if (!(data->has_dts & (1 << i)))
 501                                 continue;
 502                         data->dts[i] =
 503                                 w83795_read(client, W83795_REG_DTS(i));
 504                         data->dts_read_vrlsb[i] =
 505                                 w83795_read(client, W83795_REG_VRLSB);
 506                 }
 507         }
 508
 509         /* Update pwm output */
 510         for (i = 0; i < data->has_pwm; i++) {
 511                 data->pwm[i][PWM_OUTPUT] =
 512                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 513         }
 514
 515         /* update alarm */
 516         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
 517                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 518
 519         data->last_updated = jiffies;
 520         data->valid = 1;
 521
 522 END:
 523         mutex_unlock(&data->update_lock);
 524         return data;
 525 }
 526
 527 /*
 528  * Sysfs attributes
 529  */
 530
 531 #define ALARM_STATUS      0
 532 #define BEEP_ENABLE       1
 533 static ssize_t
 534 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 535 {
 536         struct w83795_data *data = w83795_update_device(dev);
 537         struct sensor_device_attribute_2 *sensor_attr =
 538             to_sensor_dev_attr_2(attr);
 539         int nr = sensor_attr->nr;
 540         int index = sensor_attr->index >> 3;
 541         int bit = sensor_attr->index & 0x07;
 542         u8 val;
 543
 544         if (ALARM_STATUS == nr) {
 545                 val = (data->alarms[index] >> (bit)) & 1;
 546         } else {                /* BEEP_ENABLE */
 547                 val = (data->beeps[index] >> (bit)) & 1;
 548         }
 549
 550         return sprintf(buf, "%u\n", val);
 551 }
 552
 553 static ssize_t
 554 store_beep(struct device *dev, struct device_attribute *attr,
 555            const char *buf, size_t count)
 556 {
 557         struct i2c_client *client = to_i2c_client(dev);
 558         struct w83795_data *data = i2c_get_clientdata(client);
 559         struct sensor_device_attribute_2 *sensor_attr =
 560             to_sensor_dev_attr_2(attr);
 561         int index = sensor_attr->index >> 3;
 562         int shift = sensor_attr->index & 0x07;
 563         u8 beep_bit = 1 << shift;
 564         unsigned long val;
 565
 566         if (strict_strtoul(buf, 10, &val) < 0)
 567                 return -EINVAL;
 568         if (val != 0 && val != 1)
 569                 return -EINVAL;
 570
 571         mutex_lock(&data->update_lock);
 572         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 573         data->beeps[index] &= ~beep_bit;
 574         data->beeps[index] |= val << shift;
 575         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 576         mutex_unlock(&data->update_lock);
 577
 578         return count;
 579 }
 580
 581 /* Write any value to clear chassis alarm */
 582 static ssize_t
 583 store_chassis_clear(struct device *dev,
 584                     struct device_attribute *attr, const char *buf,
 585                     size_t count)
 586 {
 587         struct i2c_client *client = to_i2c_client(dev);
 588         struct w83795_data *data = i2c_get_clientdata(client);
 589         u8 val;
 590
 591         mutex_lock(&data->update_lock);
 592         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 593         val |= 0x80;
 594         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 595         mutex_unlock(&data->update_lock);
 596         return count;
 597 }
 598
 599 #define FAN_INPUT     0
 600 #define FAN_MIN       1
 601 static ssize_t
 602 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 603 {
 604         struct sensor_device_attribute_2 *sensor_attr =
 605             to_sensor_dev_attr_2(attr);
 606         int nr = sensor_attr->nr;
 607         int index = sensor_attr->index;
 608         struct w83795_data *data = w83795_update_device(dev);
 609         u16 val;
 610
 611         if (FAN_INPUT == nr)
 612                 val = data->fan[index] & 0x0fff;
 613         else
 614                 val = data->fan_min[index] & 0x0fff;
 615
 616         return sprintf(buf, "%lu\n", fan_from_reg(val));
 617 }
 618
 619 static ssize_t
 620 store_fan_min(struct device *dev, struct device_attribute *attr,
 621               const char *buf, size_t count)
 622 {
 623         struct sensor_device_attribute_2 *sensor_attr =
 624             to_sensor_dev_attr_2(attr);
 625         int index = sensor_attr->index;
 626         struct i2c_client *client = to_i2c_client(dev);
 627         struct w83795_data *data = i2c_get_clientdata(client);
 628         unsigned long val;
 629
 630         if (strict_strtoul(buf, 10, &val))
 631                 return -EINVAL;
 632         val = fan_to_reg(val);
 633
 634         mutex_lock(&data->update_lock);
 635         data->fan_min[index] = val;
 636         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 637         val &= 0x0f;
 638         if (index & 1) {
 639                 val <<= 4;
 640                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 641                        & 0x0f;
 642         } else {
 643                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 644                        & 0xf0;
 645         }
 646         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 647         mutex_unlock(&data->update_lock);
 648
 649         return count;
 650 }
 651
 652 static ssize_t
 653 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 654 {
 655         struct w83795_data *data = w83795_update_device(dev);
 656         struct sensor_device_attribute_2 *sensor_attr =
 657             to_sensor_dev_attr_2(attr);
 658         int nr = sensor_attr->nr;
 659         int index = sensor_attr->index;
 660         unsigned int val;
 661
 662         switch (nr) {
 663         case PWM_STOP_TIME:
 664                 val = time_from_reg(data->pwm[index][nr]);
 665                 break;
 666         case PWM_FREQ:
 667                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 668                 break;
 669         default:
 670                 val = data->pwm[index][nr];
 671                 break;
 672         }
 673
 674         return sprintf(buf, "%u\n", val);
 675 }
 676
 677 static ssize_t
 678 store_pwm(struct device *dev, struct device_attribute *attr,
 679           const char *buf, size_t count)
 680 {
 681         struct i2c_client *client = to_i2c_client(dev);
 682         struct w83795_data *data = i2c_get_clientdata(client);
 683         struct sensor_device_attribute_2 *sensor_attr =
 684             to_sensor_dev_attr_2(attr);
 685         int nr = sensor_attr->nr;
 686         int index = sensor_attr->index;
 687         unsigned long val;
 688
 689         if (strict_strtoul(buf, 10, &val) < 0)
 690                 return -EINVAL;
 691
 692         mutex_lock(&data->update_lock);
 693         switch (nr) {
 694         case PWM_STOP_TIME:
 695                 val = time_to_reg(val);
 696                 break;
 697         case PWM_FREQ:
 698                 val = pwm_freq_to_reg(val, data->clkin);
 699                 break;
 700         default:
 701                 val = SENSORS_LIMIT(val, 0, 0xff);
 702                 break;
 703         }
 704         w83795_write(client, W83795_REG_PWM(index, nr), val);
 705         data->pwm[index][nr] = val;
 706         mutex_unlock(&data->update_lock);
 707         return count;
 708 }
 709
 710 static ssize_t
 711 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 712 {
 713         struct sensor_device_attribute_2 *sensor_attr =
 714             to_sensor_dev_attr_2(attr);
 715         struct i2c_client *client = to_i2c_client(dev);
 716         struct w83795_data *data = i2c_get_clientdata(client);
 717         int index = sensor_attr->index;
 718         u8 tmp;
 719
 720         if (1 == (data->pwm_fcms[0] & (1 << index))) {
 721                 tmp = 2;
 722                 goto out;
 723         }
 724         for (tmp = 0; tmp < 6; tmp++) {
 725                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 726                         tmp = 3;
 727                         goto out;
 728                 }
 729         }
 730         if (data->pwm_fomc & (1 << index))
 731                 tmp = 0;
 732         else
 733                 tmp = 1;
 734
 735 out:
 736         return sprintf(buf, "%u\n", tmp);
 737 }
 738
 739 static ssize_t
 740 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 741           const char *buf, size_t count)
 742 {
 743         struct i2c_client *client = to_i2c_client(dev);
 744         struct w83795_data *data = i2c_get_clientdata(client);
 745         struct sensor_device_attribute_2 *sensor_attr =
 746             to_sensor_dev_attr_2(attr);
 747         int index = sensor_attr->index;
 748         unsigned long val;
 749         int i;
 750
 751         if (strict_strtoul(buf, 10, &val) < 0)
 752                 return -EINVAL;
 753         if (val > 2)
 754                 return -EINVAL;
 755
 756         mutex_lock(&data->update_lock);
 757         switch (val) {
 758         case 0:
 759         case 1:
 760                 data->pwm_fcms[0] &= ~(1 << index);
 761                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 762                 for (i = 0; i < 6; i++) {
 763                         data->pwm_tfmr[i] &= ~(1 << index);
 764                         w83795_write(client, W83795_REG_TFMR(i),
 765                                 data->pwm_tfmr[i]);
 766                 }
 767                 data->pwm_fomc |= 1 << index;
 768                 data->pwm_fomc ^= val << index;
 769                 w83795_write(client, W83795_REG_FOMC, data->pwm_fomc);
 770                 break;
 771         case 2:
 772                 data->pwm_fcms[0] |= (1 << index);
 773                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 774                 break;
 775         }
 776         mutex_unlock(&data->update_lock);
 777         return count;
 778 }
 779
 780 static ssize_t
 781 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
 782 {
 783         struct sensor_device_attribute_2 *sensor_attr =
 784             to_sensor_dev_attr_2(attr);
 785         struct i2c_client *client = to_i2c_client(dev);
 786         struct w83795_data *data = i2c_get_clientdata(client);
 787         int index = sensor_attr->index;
 788         u8 val = index / 2;
 789         u8 tmp = data->temp_src[val];
 790
 791         if (index & 1)
 792                 val = 4;
 793         else
 794                 val = 0;
 795         tmp >>= val;
 796         tmp &= 0x0f;
 797
 798         return sprintf(buf, "%u\n", tmp);
 799 }
 800
 801 static ssize_t
 802 store_temp_src(struct device *dev, struct device_attribute *attr,
 803           const char *buf, size_t count)
 804 {
 805         struct i2c_client *client = to_i2c_client(dev);
 806         struct w83795_data *data = i2c_get_clientdata(client);
 807         struct sensor_device_attribute_2 *sensor_attr =
 808             to_sensor_dev_attr_2(attr);
 809         int index = sensor_attr->index;
 810         unsigned long tmp;
 811         u8 val = index / 2;
 812
 813         if (strict_strtoul(buf, 10, &tmp) < 0)
 814                 return -EINVAL;
 815         tmp = SENSORS_LIMIT(tmp, 0, 15);
 816
 817         mutex_lock(&data->update_lock);
 818         if (index & 1) {
 819                 tmp <<= 4;
 820                 data->temp_src[val] &= 0x0f;
 821         } else {
 822                 data->temp_src[val] &= 0xf0;
 823         }
 824         data->temp_src[val] |= tmp;
 825         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
 826         mutex_unlock(&data->update_lock);
 827
 828         return count;
 829 }
 830
 831 #define TEMP_PWM_ENABLE   0
 832 #define TEMP_PWM_FAN_MAP  1
 833 static ssize_t
 834 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 835                      char *buf)
 836 {
 837         struct i2c_client *client = to_i2c_client(dev);
 838         struct w83795_data *data = i2c_get_clientdata(client);
 839         struct sensor_device_attribute_2 *sensor_attr =
 840             to_sensor_dev_attr_2(attr);
 841         int nr = sensor_attr->nr;
 842         int index = sensor_attr->index;
 843         u8 tmp = 0xff;
 844
 845         switch (nr) {
 846         case TEMP_PWM_ENABLE:
 847                 tmp = (data->pwm_fcms[1] >> index) & 1;
 848                 if (tmp)
 849                         tmp = 4;
 850                 else
 851                         tmp = 3;
 852                 break;
 853         case TEMP_PWM_FAN_MAP:
 854                 tmp = data->pwm_tfmr[index];
 855                 break;
 856         }
 857
 858         return sprintf(buf, "%u\n", tmp);
 859 }
 860
 861 static ssize_t
 862 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 863           const char *buf, size_t count)
 864 {
 865         struct i2c_client *client = to_i2c_client(dev);
 866         struct w83795_data *data = i2c_get_clientdata(client);
 867         struct sensor_device_attribute_2 *sensor_attr =
 868             to_sensor_dev_attr_2(attr);
 869         int nr = sensor_attr->nr;
 870         int index = sensor_attr->index;
 871         unsigned long tmp;
 872
 873         if (strict_strtoul(buf, 10, &tmp) < 0)
 874                 return -EINVAL;
 875
 876         switch (nr) {
 877         case TEMP_PWM_ENABLE:
 878                 if ((tmp != 3) && (tmp != 4))
 879                         return -EINVAL;
 880                 tmp -= 3;
 881                 mutex_lock(&data->update_lock);
 882                 data->pwm_fcms[1] &= ~(1 << index);
 883                 data->pwm_fcms[1] |= tmp << index;
 884                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
 885                 mutex_unlock(&data->update_lock);
 886                 break;
 887         case TEMP_PWM_FAN_MAP:
 888                 mutex_lock(&data->update_lock);
 889                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
 890                 w83795_write(client, W83795_REG_TFMR(index), tmp);
 891                 data->pwm_tfmr[index] = tmp;
 892                 mutex_unlock(&data->update_lock);
 893                 break;
 894         }
 895         return count;
 896 }
 897
 898 #define FANIN_TARGET   0
 899 #define FANIN_TOL      1
 900 static ssize_t
 901 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
 902 {
 903         struct i2c_client *client = to_i2c_client(dev);
 904         struct w83795_data *data = i2c_get_clientdata(client);
 905         struct sensor_device_attribute_2 *sensor_attr =
 906             to_sensor_dev_attr_2(attr);
 907         int nr = sensor_attr->nr;
 908         int index = sensor_attr->index;
 909         u16 tmp = 0;
 910
 911         switch (nr) {
 912         case FANIN_TARGET:
 913                 tmp = fan_from_reg(data->target_speed[index]);
 914                 break;
 915         case FANIN_TOL:
 916                 tmp = data->tol_speed;
 917                 break;
 918         }
 919
 920         return sprintf(buf, "%u\n", tmp);
 921 }
 922
 923 static ssize_t
 924 store_fanin(struct device *dev, struct device_attribute *attr,
 925           const char *buf, size_t count)
 926 {
 927         struct i2c_client *client = to_i2c_client(dev);
 928         struct w83795_data *data = i2c_get_clientdata(client);
 929         struct sensor_device_attribute_2 *sensor_attr =
 930             to_sensor_dev_attr_2(attr);
 931         int nr = sensor_attr->nr;
 932         int index = sensor_attr->index;
 933         unsigned long val;
 934
 935         if (strict_strtoul(buf, 10, &val) < 0)
 936                 return -EINVAL;
 937
 938         mutex_lock(&data->update_lock);
 939         switch (nr) {
 940         case FANIN_TARGET:
 941                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
 942                 w83795_write(client, W83795_REG_FTSH(index), (val >> 4) & 0xff);
 943                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
 944                 data->target_speed[index] = val;
 945                 break;
 946         case FANIN_TOL:
 947                 val = SENSORS_LIMIT(val, 0, 0x3f);
 948                 w83795_write(client, W83795_REG_TFTS, val);
 949                 data->tol_speed = val;
 950                 break;
 951         }
 952         mutex_unlock(&data->update_lock);
 953
 954         return count;
 955 }
 956
 957
 958 static ssize_t
 959 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 960 {
 961         struct i2c_client *client = to_i2c_client(dev);
 962         struct w83795_data *data = i2c_get_clientdata(client);
 963         struct sensor_device_attribute_2 *sensor_attr =
 964             to_sensor_dev_attr_2(attr);
 965         int nr = sensor_attr->nr;
 966         int index = sensor_attr->index;
 967         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
 968
 969         return sprintf(buf, "%ld\n", tmp);
 970 }
 971
 972 static ssize_t
 973 store_temp_pwm(struct device *dev, struct device_attribute *attr,
 974           const char *buf, size_t count)
 975 {
 976         struct i2c_client *client = to_i2c_client(dev);
 977         struct w83795_data *data = i2c_get_clientdata(client);
 978         struct sensor_device_attribute_2 *sensor_attr =
 979             to_sensor_dev_attr_2(attr);
 980         int nr = sensor_attr->nr;
 981         int index = sensor_attr->index;
 982         unsigned long val;
 983         u8 tmp;
 984
 985         if (strict_strtoul(buf, 10, &val) < 0)
 986                 return -EINVAL;
 987         val /= 1000;
 988
 989         mutex_lock(&data->update_lock);
 990         switch (nr) {
 991         case TEMP_PWM_TTTI:
 992                 val = SENSORS_LIMIT(val, 0, 0x7f);
 993                 w83795_write(client, W83795_REG_TTTI(index), val);
 994                 break;
 995         case TEMP_PWM_CTFS:
 996                 val = SENSORS_LIMIT(val, 0, 0x7f);
 997                 w83795_write(client, W83795_REG_CTFS(index), val);
 998                 break;
 999         case TEMP_PWM_HCT:
1000                 val = SENSORS_LIMIT(val, 0, 0x0f);
1001                 tmp = w83795_read(client, W83795_REG_HT(index));
1002                 tmp &= 0x0f;
1003                 tmp |= (val << 4) & 0xf0;
1004                 w83795_write(client, W83795_REG_HT(index), tmp);
1005                 break;
1006         case TEMP_PWM_HOT:
1007                 val = SENSORS_LIMIT(val, 0, 0x0f);
1008                 tmp = w83795_read(client, W83795_REG_HT(index));
1009                 tmp &= 0xf0;
1010                 tmp |= val & 0x0f;
1011                 w83795_write(client, W83795_REG_HT(index), tmp);
1012                 break;
1013         }
1014         data->pwm_temp[index][nr] = val;
1015         mutex_unlock(&data->update_lock);
1016
1017         return count;
1018 }
1019
1020 static ssize_t
1021 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1022 {
1023         struct i2c_client *client = to_i2c_client(dev);
1024         struct w83795_data *data = i2c_get_clientdata(client);
1025         struct sensor_device_attribute_2 *sensor_attr =
1026             to_sensor_dev_attr_2(attr);
1027         int nr = sensor_attr->nr;
1028         int index = sensor_attr->index;
1029
1030         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1031 }
1032
1033 static ssize_t
1034 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1035           const char *buf, size_t count)
1036 {
1037         struct i2c_client *client = to_i2c_client(dev);
1038         struct w83795_data *data = i2c_get_clientdata(client);
1039         struct sensor_device_attribute_2 *sensor_attr =
1040             to_sensor_dev_attr_2(attr);
1041         int nr = sensor_attr->nr;
1042         int index = sensor_attr->index;
1043         unsigned long val;
1044
1045         if (strict_strtoul(buf, 10, &val) < 0)
1046                 return -EINVAL;
1047
1048         mutex_lock(&data->update_lock);
1049         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1050         data->sf4_reg[index][SF4_PWM][nr] = val;
1051         mutex_unlock(&data->update_lock);
1052
1053         return count;
1054 }
1055
1056 static ssize_t
1057 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1058 {
1059         struct i2c_client *client = to_i2c_client(dev);
1060         struct w83795_data *data = i2c_get_clientdata(client);
1061         struct sensor_device_attribute_2 *sensor_attr =
1062             to_sensor_dev_attr_2(attr);
1063         int nr = sensor_attr->nr;
1064         int index = sensor_attr->index;
1065
1066         return sprintf(buf, "%u\n",
1067                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1068 }
1069
1070 static ssize_t
1071 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1072           const char *buf, size_t count)
1073 {
1074         struct i2c_client *client = to_i2c_client(dev);
1075         struct w83795_data *data = i2c_get_clientdata(client);
1076         struct sensor_device_attribute_2 *sensor_attr =
1077             to_sensor_dev_attr_2(attr);
1078         int nr = sensor_attr->nr;
1079         int index = sensor_attr->index;
1080         unsigned long val;
1081
1082         if (strict_strtoul(buf, 10, &val) < 0)
1083                 return -EINVAL;
1084         val /= 1000;
1085
1086         mutex_lock(&data->update_lock);
1087         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1088         data->sf4_reg[index][SF4_TEMP][nr] = val;
1089         mutex_unlock(&data->update_lock);
1090
1091         return count;
1092 }
1093
1094
1095 static ssize_t
1096 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1097 {
1098         struct sensor_device_attribute_2 *sensor_attr =
1099             to_sensor_dev_attr_2(attr);
1100         int nr = sensor_attr->nr;
1101         int index = sensor_attr->index;
1102         struct w83795_data *data = w83795_update_device(dev);
1103         long temp = temp_from_reg(data->temp[index][nr]);
1104
1105         if (TEMP_READ == nr)
1106                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1107         return sprintf(buf, "%ld\n", temp);
1108 }
1109
1110 static ssize_t
1111 store_temp(struct device *dev, struct device_attribute *attr,
1112            const char *buf, size_t count)
1113 {
1114         struct sensor_device_attribute_2 *sensor_attr =
1115             to_sensor_dev_attr_2(attr);
1116         int nr = sensor_attr->nr;
1117         int index = sensor_attr->index;
1118         struct i2c_client *client = to_i2c_client(dev);
1119         struct w83795_data *data = i2c_get_clientdata(client);
1120         long tmp;
1121
1122         if (strict_strtol(buf, 10, &tmp) < 0)
1123                 return -EINVAL;
1124
1125         mutex_lock(&data->update_lock);
1126         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1127         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1128         mutex_unlock(&data->update_lock);
1129         return count;
1130 }
1131
1132
1133 static ssize_t
1134 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1135 {
1136         struct i2c_client *client = to_i2c_client(dev);
1137         struct w83795_data *data = i2c_get_clientdata(client);
1138         int tmp;
1139
1140         if (data->enable_dts & 2)
1141                 tmp = 5;
1142         else
1143                 tmp = 6;
1144
1145         return sprintf(buf, "%d\n", tmp);
1146 }
1147
1148 static ssize_t
1149 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1150 {
1151         struct sensor_device_attribute_2 *sensor_attr =
1152             to_sensor_dev_attr_2(attr);
1153         int index = sensor_attr->index;
1154         struct w83795_data *data = w83795_update_device(dev);
1155         long temp = temp_from_reg(data->dts[index]);
1156
1157         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1158         return sprintf(buf, "%ld\n", temp);
1159 }
1160
1161 static ssize_t
1162 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1163 {
1164         struct sensor_device_attribute_2 *sensor_attr =
1165             to_sensor_dev_attr_2(attr);
1166         int nr = sensor_attr->nr;
1167         struct i2c_client *client = to_i2c_client(dev);
1168         struct w83795_data *data = i2c_get_clientdata(client);
1169         long temp = temp_from_reg(data->dts_ext[nr]);
1170
1171         return sprintf(buf, "%ld\n", temp);
1172 }
1173
1174 static ssize_t
1175 store_dts_ext(struct device *dev, struct device_attribute *attr,
1176            const char *buf, size_t count)
1177 {
1178         struct sensor_device_attribute_2 *sensor_attr =
1179             to_sensor_dev_attr_2(attr);
1180         int nr = sensor_attr->nr;
1181         struct i2c_client *client = to_i2c_client(dev);
1182         struct w83795_data *data = i2c_get_clientdata(client);
1183         long tmp;
1184
1185         if (strict_strtol(buf, 10, &tmp) < 0)
1186                 return -EINVAL;
1187
1188         mutex_lock(&data->update_lock);
1189         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1190         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1191         mutex_unlock(&data->update_lock);
1192         return count;
1193 }
1194
1195
1196 static ssize_t
1197 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1198 {
1199         struct i2c_client *client = to_i2c_client(dev);
1200         struct w83795_data *data = i2c_get_clientdata(client);
1201         struct sensor_device_attribute_2 *sensor_attr =
1202             to_sensor_dev_attr_2(attr);
1203         int index = sensor_attr->index;
1204         int tmp;
1205
1206         if (data->temp_mode & (1 << index))
1207                 tmp = 3;        /* Thermal diode */
1208         else
1209                 tmp = 4;        /* Thermistor */
1210
1211         return sprintf(buf, "%d\n", tmp);
1212 }
1213
1214 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1215 static ssize_t
1216 store_temp_mode(struct device *dev, struct device_attribute *attr,
1217                 const char *buf, size_t count)
1218 {
1219         struct i2c_client *client = to_i2c_client(dev);
1220         struct w83795_data *data = i2c_get_clientdata(client);
1221         struct sensor_device_attribute_2 *sensor_attr =
1222             to_sensor_dev_attr_2(attr);
1223         int index = sensor_attr->index;
1224         int reg_shift;
1225         unsigned long val;
1226         u8 tmp;
1227
1228         if (strict_strtoul(buf, 10, &val) < 0)
1229                 return -EINVAL;
1230         if ((val != 4) && (val != 3))
1231                 return -EINVAL;
1232
1233         mutex_lock(&data->update_lock);
1234         if (val == 3) {
1235                 /* Thermal diode */
1236                 val = 0x01;
1237                 data->temp_mode |= 1 << index;
1238         } else if (val == 4) {
1239                 /* Thermistor */
1240                 val = 0x03;
1241                 data->temp_mode &= ~(1 << index);
1242         }
1243
1244         reg_shift = 2 * index;
1245         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1246         tmp &= ~(0x03 << reg_shift);
1247         tmp |= val << reg_shift;
1248         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1249
1250         mutex_unlock(&data->update_lock);
1251         return count;
1252 }
1253
1254
1255 /* show/store VIN */
1256 static ssize_t
1257 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1258 {
1259         struct sensor_device_attribute_2 *sensor_attr =
1260             to_sensor_dev_attr_2(attr);
1261         int nr = sensor_attr->nr;
1262         int index = sensor_attr->index;
1263         struct w83795_data *data = w83795_update_device(dev);
1264         u16 val = data->in[index][nr];
1265         u8 lsb_idx;
1266
1267         switch (nr) {
1268         case IN_READ:
1269                 /* calculate this value again by sensors as sensors3.conf */
1270                 if ((index >= 17) &&
1271                     !((data->has_gain >> (index - 17)) & 1))
1272                         val *= 8;
1273                 break;
1274         case IN_MAX:
1275         case IN_LOW:
1276                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1277                 val <<= 2;
1278                 val |= (data->in_lsb[lsb_idx][nr] >>
1279                         IN_LSB_SHIFT_IDX[lsb_idx][IN_LSB_SHIFT]) & 0x03;
1280                 if ((index >= 17) &&
1281                     !((data->has_gain >> (index - 17)) & 1))
1282                         val *= 8;
1283                 break;
1284         }
1285         val = in_from_reg(index, val);
1286
1287         return sprintf(buf, "%d\n", val);
1288 }
1289
1290 static ssize_t
1291 store_in(struct device *dev, struct device_attribute *attr,
1292          const char *buf, size_t count)
1293 {
1294         struct sensor_device_attribute_2 *sensor_attr =
1295             to_sensor_dev_attr_2(attr);
1296         int nr = sensor_attr->nr;
1297         int index = sensor_attr->index;
1298         struct i2c_client *client = to_i2c_client(dev);
1299         struct w83795_data *data = i2c_get_clientdata(client);
1300         unsigned long val;
1301         u8 tmp;
1302         u8 lsb_idx;
1303
1304         if (strict_strtoul(buf, 10, &val) < 0)
1305                 return -EINVAL;
1306         val = in_to_reg(index, val);
1307
1308         if ((index >= 17) &&
1309             !((data->has_gain >> (index - 17)) & 1))
1310                 val /= 8;
1311         val = SENSORS_LIMIT(val, 0, 0x3FF);
1312         mutex_lock(&data->update_lock);
1313
1314         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1315         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1316         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1317         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1318         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1319         data->in_lsb[lsb_idx][nr] = tmp;
1320
1321         tmp = (val >> 2) & 0xff;
1322         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1323         data->in[index][nr] = tmp;
1324
1325         mutex_unlock(&data->update_lock);
1326         return count;
1327 }
1328
1329
1330 static ssize_t
1331 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1332 {
1333         struct sensor_device_attribute_2 *sensor_attr =
1334             to_sensor_dev_attr_2(attr);
1335         int nr = sensor_attr->nr;
1336         struct i2c_client *client = to_i2c_client(dev);
1337         struct w83795_data *data = i2c_get_clientdata(client);
1338         u16 val = data->setup_pwm[nr];
1339
1340         switch (nr) {
1341         case SETUP_PWM_UPTIME:
1342         case SETUP_PWM_DOWNTIME:
1343                 val = time_from_reg(val);
1344                 break;
1345         }
1346
1347         return sprintf(buf, "%d\n", val);
1348 }
1349
1350 static ssize_t
1351 store_sf_setup(struct device *dev, struct device_attribute *attr,
1352          const char *buf, size_t count)
1353 {
1354         struct sensor_device_attribute_2 *sensor_attr =
1355             to_sensor_dev_attr_2(attr);
1356         int nr = sensor_attr->nr;
1357         struct i2c_client *client = to_i2c_client(dev);
1358         struct w83795_data *data = i2c_get_clientdata(client);
1359         unsigned long val;
1360
1361         if (strict_strtoul(buf, 10, &val) < 0)
1362                 return -EINVAL;
1363
1364         switch (nr) {
1365         case SETUP_PWM_DEFAULT:
1366                 val = SENSORS_LIMIT(val, 0, 0xff);
1367                 break;
1368         case SETUP_PWM_UPTIME:
1369         case SETUP_PWM_DOWNTIME:
1370                 val = time_to_reg(val);
1371                 if (val == 0)
1372                         return -EINVAL;
1373                 break;
1374         }
1375
1376         mutex_lock(&data->update_lock);
1377         data->setup_pwm[nr] = val;
1378         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1379         mutex_unlock(&data->update_lock);
1380         return count;
1381 }
1382
1383
1384 #define NOT_USED                        -1
1385
1386 /* Don't change the attribute order, _max and _min are accessed by index
1387  * somewhere else in the code */
1388 #define SENSOR_ATTR_IN(index) {                                         \
1389         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1390                 IN_READ, index), \
1391         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1392                 store_in, IN_MAX, index),                               \
1393         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1394                 store_in, IN_LOW, index),                               \
1395         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1396                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1397         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1398                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1399                 index + ((index > 14) ? 1 : 0)) }
1400
1401 #define SENSOR_ATTR_FAN(index) {                                        \
1402         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1403                 NULL, FAN_INPUT, index - 1), \
1404         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1405                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1406         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1407                 NULL, ALARM_STATUS, index + 31),                        \
1408         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1409                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1410
1411 #define SENSOR_ATTR_PWM(index) {                                        \
1412         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1413                 store_pwm, PWM_OUTPUT, index - 1),                      \
1414         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1415                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1416         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1417                 show_pwm, store_pwm, PWM_START, index - 1),             \
1418         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1419                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1420         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,     \
1421                 show_pwm, store_pwm, PWM_FREQ, index - 1),       \
1422         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1423                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1424         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1425                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1426
1427 #define SENSOR_ATTR_DTS(index) {                                        \
1428         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1429                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1430         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1431                 NULL, NOT_USED, index - 7),                             \
1432         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1433                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1434         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1435                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1436         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1437                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1438         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1439                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1440         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1441                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1442         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1443                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1444
1445 #define SENSOR_ATTR_TEMP(index) {                                       \
1446         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1447                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1448         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1449                 NULL, TEMP_READ, index - 1),                            \
1450         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1451                 store_temp, TEMP_CRIT, index - 1),                      \
1452         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1453                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1454         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1455                 store_temp, TEMP_WARN, index - 1),                      \
1456         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1457                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1458         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1459                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1460                 index + (index > 4 ? 11 : 17)),                         \
1461         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1462                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1463                 index + (index > 4 ? 11 : 17)),                         \
1464         SENSOR_ATTR_2(temp##index##_source_sel, S_IWUSR | S_IRUGO,      \
1465                 show_temp_src, store_temp_src, NOT_USED, index - 1),    \
1466         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1467                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1468                 TEMP_PWM_ENABLE, index - 1),                            \
1469         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1470                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1471                 TEMP_PWM_FAN_MAP, index - 1),                           \
1472         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1473                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1474         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1475                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1476         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1477                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1478         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1479                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1480         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1481                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1482         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1483                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1484         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1485                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1486         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1487                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1488         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1489                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1490         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1491                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1492         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1493                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1494         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1495                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1496         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1497                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1498         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1499                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1500         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1501                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1502         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1503                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1504         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1505                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1506         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1507                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1508
1509
1510 static struct sensor_device_attribute_2 w83795_in[][5] = {
1511         SENSOR_ATTR_IN(0),
1512         SENSOR_ATTR_IN(1),
1513         SENSOR_ATTR_IN(2),
1514         SENSOR_ATTR_IN(3),
1515         SENSOR_ATTR_IN(4),
1516         SENSOR_ATTR_IN(5),
1517         SENSOR_ATTR_IN(6),
1518         SENSOR_ATTR_IN(7),
1519         SENSOR_ATTR_IN(8),
1520         SENSOR_ATTR_IN(9),
1521         SENSOR_ATTR_IN(10),
1522         SENSOR_ATTR_IN(11),
1523         SENSOR_ATTR_IN(12),
1524         SENSOR_ATTR_IN(13),
1525         SENSOR_ATTR_IN(14),
1526         SENSOR_ATTR_IN(15),
1527         SENSOR_ATTR_IN(16),
1528         SENSOR_ATTR_IN(17),
1529         SENSOR_ATTR_IN(18),
1530         SENSOR_ATTR_IN(19),
1531         SENSOR_ATTR_IN(20),
1532 };
1533
1534 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1535         SENSOR_ATTR_FAN(1),
1536         SENSOR_ATTR_FAN(2),
1537         SENSOR_ATTR_FAN(3),
1538         SENSOR_ATTR_FAN(4),
1539         SENSOR_ATTR_FAN(5),
1540         SENSOR_ATTR_FAN(6),
1541         SENSOR_ATTR_FAN(7),
1542         SENSOR_ATTR_FAN(8),
1543         SENSOR_ATTR_FAN(9),
1544         SENSOR_ATTR_FAN(10),
1545         SENSOR_ATTR_FAN(11),
1546         SENSOR_ATTR_FAN(12),
1547         SENSOR_ATTR_FAN(13),
1548         SENSOR_ATTR_FAN(14),
1549 };
1550
1551 static const struct sensor_device_attribute_2 w83795_temp[][29] = {
1552         SENSOR_ATTR_TEMP(1),
1553         SENSOR_ATTR_TEMP(2),
1554         SENSOR_ATTR_TEMP(3),
1555         SENSOR_ATTR_TEMP(4),
1556         SENSOR_ATTR_TEMP(5),
1557         SENSOR_ATTR_TEMP(6),
1558 };
1559
1560 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1561         SENSOR_ATTR_DTS(7),
1562         SENSOR_ATTR_DTS(8),
1563         SENSOR_ATTR_DTS(9),
1564         SENSOR_ATTR_DTS(10),
1565         SENSOR_ATTR_DTS(11),
1566         SENSOR_ATTR_DTS(12),
1567         SENSOR_ATTR_DTS(13),
1568         SENSOR_ATTR_DTS(14),
1569 };
1570
1571 static const struct sensor_device_attribute_2 w83795_pwm[][7] = {
1572         SENSOR_ATTR_PWM(1),
1573         SENSOR_ATTR_PWM(2),
1574         SENSOR_ATTR_PWM(3),
1575         SENSOR_ATTR_PWM(4),
1576         SENSOR_ATTR_PWM(5),
1577         SENSOR_ATTR_PWM(6),
1578         SENSOR_ATTR_PWM(7),
1579         SENSOR_ATTR_PWM(8),
1580 };
1581
1582 static const struct sensor_device_attribute_2 sda_single_files[] = {
1583         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1584                       store_chassis_clear, ALARM_STATUS, 46),
1585         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1586                       store_beep, BEEP_ENABLE, 47),
1587         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1588                 store_fanin, FANIN_TOL, NOT_USED),
1589         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1590                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1591         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1592                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1593         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1594                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1595 };
1596
1597 /*
1598  * Driver interface
1599  */
1600
1601 static void w83795_init_client(struct i2c_client *client)
1602 {
1603         struct w83795_data *data = i2c_get_clientdata(client);
1604         static const u16 clkin[4] = {   /* in kHz */
1605                 14318, 24000, 33333, 48000
1606         };
1607         u8 config;
1608
1609         if (reset)
1610                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1611
1612         /* Start monitoring if needed */
1613         config = w83795_read(client, W83795_REG_CONFIG);
1614         if (!(config & W83795_REG_CONFIG_START)) {
1615                 dev_info(&client->dev, "Enabling monitoring operations\n");
1616                 w83795_write(client, W83795_REG_CONFIG,
1617                              config | W83795_REG_CONFIG_START);
1618         }
1619
1620         data->clkin = clkin[(config >> 3) & 0x3];
1621         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1622 }
1623
1624 static int w83795_get_device_id(struct i2c_client *client)
1625 {
1626         int device_id;
1627
1628         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1629
1630         /* Special case for rev. A chips; can't be checked first because later
1631            revisions emulate this for compatibility */
1632         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1633                 int alt_id;
1634
1635                 alt_id = i2c_smbus_read_byte_data(client,
1636                                                   W83795_REG_DEVICEID_A);
1637                 if (alt_id == 0x50)
1638                         device_id = alt_id;
1639         }
1640
1641         return device_id;
1642 }
1643
1644 /* Return 0 if detection is successful, -ENODEV otherwise */
1645 static int w83795_detect(struct i2c_client *client,
1646                          struct i2c_board_info *info)
1647 {
1648         int bank, vendor_id, device_id, expected, i2c_addr, config;
1649         struct i2c_adapter *adapter = client->adapter;
1650         unsigned short address = client->addr;
1651         const char *chip_name;
1652
1653         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1654                 return -ENODEV;
1655         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1656         if (bank < 0 || (bank & 0x7c)) {
1657                 dev_dbg(&adapter->dev,
1658                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1659                         address, "bank");
1660                 return -ENODEV;
1661         }
1662
1663         /* Check Nuvoton vendor ID */
1664         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1665         expected = bank & 0x80 ? 0x5c : 0xa3;
1666         if (vendor_id != expected) {
1667                 dev_dbg(&adapter->dev,
1668                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1669                         address, "vendor id");
1670                 return -ENODEV;
1671         }
1672
1673         /* Check device ID */
1674         device_id = w83795_get_device_id(client) |
1675                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1676         if ((device_id >> 4) != 0x795) {
1677                 dev_dbg(&adapter->dev,
1678                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1679                         address, "device id\n");
1680                 return -ENODEV;
1681         }
1682
1683         /* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1684            should match */
1685         if ((bank & 0x07) == 0) {
1686                 i2c_addr = i2c_smbus_read_byte_data(client,
1687                                                     W83795_REG_I2C_ADDR);
1688                 if ((i2c_addr & 0x7f) != address) {
1689                         dev_dbg(&adapter->dev,
1690                                 "w83795: Detection failed at addr 0x%02hx, "
1691                                 "check %s\n", address, "i2c addr");
1692                         return -ENODEV;
1693                 }
1694         }
1695
1696         /* Check 795 chip type: 795G or 795ADG
1697            Usually we don't write to chips during detection, but here we don't
1698            quite have the choice; hopefully it's OK, we are about to return
1699            success anyway */
1700         if ((bank & 0x07) != 0)
1701                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1702                                           bank & ~0x07);
1703         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1704         if (config & W83795_REG_CONFIG_CONFIG48)
1705                 chip_name = "w83795adg";
1706         else
1707                 chip_name = "w83795g";
1708
1709         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1710         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1711                  'A' + (device_id & 0xf), address);
1712
1713         return 0;
1714 }
1715
1716 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1717                                const struct device_attribute *))
1718 {
1719         struct w83795_data *data = dev_get_drvdata(dev);
1720         int err, i, j;
1721
1722         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
1723                 if (!(data->has_in & (1 << i)))
1724                         continue;
1725                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
1726                         err = fn(dev, &w83795_in[i][j].dev_attr);
1727                         if (err)
1728                                 return err;
1729                 }
1730         }
1731
1732         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
1733                 if (!(data->has_fan & (1 << i)))
1734                         continue;
1735                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
1736                         err = fn(dev, &w83795_fan[i][j].dev_attr);
1737                         if (err)
1738                                 return err;
1739                 }
1740         }
1741
1742         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1743                 err = fn(dev, &sda_single_files[i].dev_attr);
1744                 if (err)
1745                         return err;
1746         }
1747
1748         for (i = 0; i < data->has_pwm; i++) {
1749                 for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) {
1750                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
1751                         if (err)
1752                                 return err;
1753                 }
1754         }
1755
1756         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
1757                 if (!(data->has_temp & (1 << i)))
1758                         continue;
1759                 for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) {
1760                         err = fn(dev, &w83795_temp[i][j].dev_attr);
1761                         if (err)
1762                                 return err;
1763                 }
1764         }
1765
1766         if (data->enable_dts != 0) {
1767                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
1768                         if (!(data->has_dts & (1 << i)))
1769                                 continue;
1770                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
1771                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
1772                                 if (err)
1773                                         return err;
1774                         }
1775                 }
1776         }
1777
1778         return 0;
1779 }
1780
1781 /* We need a wrapper that fits in w83795_handle_files */
1782 static int device_remove_file_wrapper(struct device *dev,
1783                                       const struct device_attribute *attr)
1784 {
1785         device_remove_file(dev, attr);
1786         return 0;
1787 }
1788
1789 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
1790 {
1791         struct w83795_data *data = i2c_get_clientdata(client);
1792         u8 vid_ctl;
1793         int i, err_max, err_min;
1794
1795         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
1796
1797         /* Return immediately if VRM isn't configured */
1798         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
1799                 return;
1800
1801         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
1802         for (i = 0; i < 2; i++) {
1803                 if (!(data->has_dyn_in & (1 << i)))
1804                         continue;
1805
1806                 /* Voltage limits in dynamic mode, switch to read-only */
1807                 err_max = sysfs_chmod_file(&client->dev.kobj,
1808                                            &w83795_in[i][2].dev_attr.attr,
1809                                            S_IRUGO);
1810                 err_min = sysfs_chmod_file(&client->dev.kobj,
1811                                            &w83795_in[i][3].dev_attr.attr,
1812                                            S_IRUGO);
1813                 if (err_max || err_min)
1814                         dev_warn(&client->dev, "Failed to set in%d limits "
1815                                  "read-only (%d, %d)\n", i, err_max, err_min);
1816                 else
1817                         dev_info(&client->dev, "in%d limits set dynamically "
1818                                  "from VID\n", i);
1819         }
1820 }
1821
1822 /* Check pins that can be used for either temperature or voltage monitoring */
1823 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
1824                                      int temp_chan, int in_chan)
1825 {
1826         /* config is a 2-bit value */
1827         switch (config) {
1828         case 0x2: /* Voltage monitoring */
1829                 data->has_in |= 1 << in_chan;
1830                 break;
1831         case 0x1: /* Thermal diode */
1832                 if (temp_chan >= 4)
1833                         break;
1834                 data->temp_mode |= 1 << temp_chan;
1835                 /* fall through */
1836         case 0x3: /* Thermistor */
1837                 data->has_temp |= 1 << temp_chan;
1838                 break;
1839         }
1840 }
1841
1842 static int w83795_probe(struct i2c_client *client,
1843                         const struct i2c_device_id *id)
1844 {
1845         int i;
1846         u8 tmp;
1847         struct device *dev = &client->dev;
1848         struct w83795_data *data;
1849         int err;
1850
1851         data = kzalloc(sizeof(struct w83795_data), GFP_KERNEL);
1852         if (!data) {
1853                 err = -ENOMEM;
1854                 goto exit;
1855         }
1856
1857         i2c_set_clientdata(client, data);
1858         data->chip_type = id->driver_data;
1859         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1860         mutex_init(&data->update_lock);
1861
1862         /* Initialize the chip */
1863         w83795_init_client(client);
1864
1865         /* Check which voltages and fans are present */
1866         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
1867                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
1868         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
1869                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
1870
1871         /* Check which analog temperatures and extra voltages are present */
1872         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
1873         if (tmp & 0x20)
1874                 data->enable_dts = 1;
1875         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
1876         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
1877         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1878         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
1879         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
1880         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
1881         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
1882
1883         /* Check DTS enable status */
1884         if (data->enable_dts) {
1885                 if (1 & w83795_read(client, W83795_REG_DTSC))
1886                         data->enable_dts |= 2;
1887                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
1888         }
1889
1890         /* Report PECI Tbase values */
1891         if (data->enable_dts == 1) {
1892                 for (i = 0; i < 8; i++) {
1893                         if (!(data->has_dts & (1 << i)))
1894                                 continue;
1895                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
1896                         dev_info(&client->dev,
1897                                  "PECI agent %d Tbase temperature: %u\n",
1898                                  i + 1, (unsigned int)tmp & 0x7f);
1899                 }
1900         }
1901
1902         /* Read the voltage limits */
1903         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
1904                 if (!(data->has_in & (1 << i)))
1905                         continue;
1906                 data->in[i][IN_MAX] =
1907                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
1908                 data->in[i][IN_LOW] =
1909                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
1910         }
1911         for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
1912                 if ((i == 2 && data->chip_type == w83795adg) ||
1913                     (i >= 4 && !(data->has_in & (1 << (i + 11)))))
1914                         continue;
1915                 data->in_lsb[i][IN_MAX] =
1916                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
1917                 data->in_lsb[i][IN_LOW] =
1918                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
1919         }
1920         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
1921
1922         /* Read the fan limits */
1923         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
1924                 /* Each register contains LSB for 2 fans, but we want to
1925                  * read it only once to save time */
1926                 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
1927                         tmp = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
1928
1929                 if (!(data->has_fan & (1 << i)))
1930                         continue;
1931                 data->fan_min[i] =
1932                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
1933                 data->fan_min[i] |=
1934                         (tmp >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
1935         }
1936
1937         /* Read the temperature limits */
1938         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
1939                 if (!(data->has_temp & (1 << i)))
1940                         continue;
1941                 for (tmp = TEMP_CRIT; tmp <= TEMP_WARN_HYST; tmp++)
1942                         data->temp[i][tmp] =
1943                                 w83795_read(client, W83795_REG_TEMP[i][tmp]);
1944         }
1945
1946         /* Read the DTS limits */
1947         if (data->enable_dts != 0) {
1948                 for (i = DTS_CRIT; i <= DTS_WARN_HYST; i++)
1949                         data->dts_ext[i] =
1950                                 w83795_read(client, W83795_REG_DTS_EXT(i));
1951         }
1952
1953         /* First update temp source selction */
1954         for (i = 0; i < 3; i++)
1955                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
1956
1957         /* pwm and smart fan */
1958         if (data->chip_type == w83795g)
1959                 data->has_pwm = 8;
1960         else
1961                 data->has_pwm = 2;
1962         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
1963         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
1964         for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
1965                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
1966         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
1967         for (i = 0; i < data->has_pwm; i++) {
1968                 for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
1969                         data->pwm[i][tmp] =
1970                                 w83795_read(client, W83795_REG_PWM(i, tmp));
1971         }
1972         for (i = 0; i < 8; i++) {
1973                 data->target_speed[i] =
1974                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
1975                 data->target_speed[i] |=
1976                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
1977         }
1978         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
1979
1980         for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
1981                 data->pwm_temp[i][TEMP_PWM_TTTI] =
1982                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
1983                 data->pwm_temp[i][TEMP_PWM_CTFS] =
1984                         w83795_read(client, W83795_REG_CTFS(i));
1985                 tmp = w83795_read(client, W83795_REG_HT(i));
1986                 data->pwm_temp[i][TEMP_PWM_HCT] = (tmp >> 4) & 0x0f;
1987                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
1988         }
1989         for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
1990                 for (tmp = 0; tmp < 7; tmp++) {
1991                         data->sf4_reg[i][SF4_TEMP][tmp] =
1992                                 w83795_read(client,
1993                                             W83795_REG_SF4_TEMP(i, tmp));
1994                         data->sf4_reg[i][SF4_PWM][tmp] =
1995                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
1996                 }
1997         }
1998
1999         /* Setup PWM Register */
2000         for (i = 0; i < 3; i++) {
2001                 data->setup_pwm[i] =
2002                         w83795_read(client, W83795_REG_SETUP_PWM(i));
2003         }
2004
2005         /* Read beep settings */
2006         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2007                 data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i));
2008
2009         err = w83795_handle_files(dev, device_create_file);
2010         if (err)
2011                 goto exit_remove;
2012
2013         if (data->chip_type == w83795g)
2014                 w83795_check_dynamic_in_limits(client);
2015
2016         data->hwmon_dev = hwmon_device_register(dev);
2017         if (IS_ERR(data->hwmon_dev)) {
2018                 err = PTR_ERR(data->hwmon_dev);
2019                 goto exit_remove;
2020         }
2021
2022         return 0;
2023
2024 exit_remove:
2025         w83795_handle_files(dev, device_remove_file_wrapper);
2026         kfree(data);
2027 exit:
2028         return err;
2029 }
2030
2031 static int w83795_remove(struct i2c_client *client)
2032 {
2033         struct w83795_data *data = i2c_get_clientdata(client);
2034
2035         hwmon_device_unregister(data->hwmon_dev);
2036         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2037         kfree(data);
2038
2039         return 0;
2040 }
2041
2042
2043 static const struct i2c_device_id w83795_id[] = {
2044         { "w83795g", w83795g },
2045         { "w83795adg", w83795adg },
2046         { }
2047 };
2048 MODULE_DEVICE_TABLE(i2c, w83795_id);
2049
2050 static struct i2c_driver w83795_driver = {
2051         .driver = {
2052                    .name = "w83795",
2053         },
2054         .probe          = w83795_probe,
2055         .remove         = w83795_remove,
2056         .id_table       = w83795_id,
2057
2058         .class          = I2C_CLASS_HWMON,
2059         .detect         = w83795_detect,
2060         .address_list   = normal_i2c,
2061 };
2062
2063 static int __init sensors_w83795_init(void)
2064 {
2065         return i2c_add_driver(&w83795_driver);
2066 }
2067
2068 static void __exit sensors_w83795_exit(void)
2069 {
2070         i2c_del_driver(&w83795_driver);
2071 }
2072
2073 MODULE_AUTHOR("Wei Song");
2074 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2075 MODULE_LICENSE("GPL");
2076
2077 module_init(sensors_w83795_init);
2078 module_exit(sensors_w83795_exit);