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  *  Copyright (C) 2010 Jean Delvare <khali@linux-fr.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation - version 2.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  *  02110-1301 USA.
  20  *
  21  *  Supports following chips:
  22  *
  23  *  Chip       #vin   #fanin #pwm #temp #dts wchipid  vendid  i2c  ISA
  24  *  w83795g     21     14     8     6     8    0x79   0x5ca3  yes   no
  25  *  w83795adg   18     14     2     6     8    0x79   0x5ca3  yes   no
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/i2c.h>
  33 #include <linux/hwmon.h>
  34 #include <linux/hwmon-sysfs.h>
  35 #include <linux/err.h>
  36 #include <linux/mutex.h>
  37 #include <linux/delay.h>
  38
  39 /* Addresses to scan */
  40 static const unsigned short normal_i2c[] = {
  41         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
  42 };
  43
  44
  45 static int reset;
  46 module_param(reset, bool, 0);
  47 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  48
  49
  50 #define W83795_REG_BANKSEL              0x00
  51 #define W83795_REG_VENDORID             0xfd
  52 #define W83795_REG_CHIPID               0xfe
  53 #define W83795_REG_DEVICEID             0xfb
  54 #define W83795_REG_DEVICEID_A           0xff
  55
  56 #define W83795_REG_I2C_ADDR             0xfc
  57 #define W83795_REG_CONFIG               0x01
  58 #define W83795_REG_CONFIG_CONFIG48      0x04
  59 #define W83795_REG_CONFIG_START 0x01
  60
  61 /* Multi-Function Pin Ctrl Registers */
  62 #define W83795_REG_VOLT_CTRL1           0x02
  63 #define W83795_REG_VOLT_CTRL2           0x03
  64 #define W83795_REG_TEMP_CTRL1           0x04
  65 #define W83795_REG_TEMP_CTRL2           0x05
  66 #define W83795_REG_FANIN_CTRL1          0x06
  67 #define W83795_REG_FANIN_CTRL2          0x07
  68 #define W83795_REG_VMIGB_CTRL           0x08
  69
  70 #define TEMP_READ                       0
  71 #define TEMP_CRIT                       1
  72 #define TEMP_CRIT_HYST                  2
  73 #define TEMP_WARN                       3
  74 #define TEMP_WARN_HYST                  4
  75 /* only crit and crit_hyst affect real-time alarm status
  76  * current crit crit_hyst warn warn_hyst */
  77 static const u16 W83795_REG_TEMP[][5] = {
  78         {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
  79         {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
  80         {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
  81         {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
  82         {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
  83         {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
  84 };
  85
  86 #define IN_READ                         0
  87 #define IN_MAX                          1
  88 #define IN_LOW                          2
  89 static const u16 W83795_REG_IN[][3] = {
  90         /* Current, HL, LL */
  91         {0x10, 0x70, 0x71},     /* VSEN1 */
  92         {0x11, 0x72, 0x73},     /* VSEN2 */
  93         {0x12, 0x74, 0x75},     /* VSEN3 */
  94         {0x13, 0x76, 0x77},     /* VSEN4 */
  95         {0x14, 0x78, 0x79},     /* VSEN5 */
  96         {0x15, 0x7a, 0x7b},     /* VSEN6 */
  97         {0x16, 0x7c, 0x7d},     /* VSEN7 */
  98         {0x17, 0x7e, 0x7f},     /* VSEN8 */
  99         {0x18, 0x80, 0x81},     /* VSEN9 */
 100         {0x19, 0x82, 0x83},     /* VSEN10 */
 101         {0x1A, 0x84, 0x85},     /* VSEN11 */
 102         {0x1B, 0x86, 0x87},     /* VTT */
 103         {0x1C, 0x88, 0x89},     /* 3VDD */
 104         {0x1D, 0x8a, 0x8b},     /* 3VSB */
 105         {0x1E, 0x8c, 0x8d},     /* VBAT */
 106         {0x1F, 0xa6, 0xa7},     /* VSEN12 */
 107         {0x20, 0xaa, 0xab},     /* VSEN13 */
 108         {0x21, 0x96, 0x97},     /* VSEN14 */
 109         {0x22, 0x9a, 0x9b},     /* VSEN15 */
 110         {0x23, 0x9e, 0x9f},     /* VSEN16 */
 111         {0x24, 0xa2, 0xa3},     /* VSEN17 */
 112 };
 113 #define W83795_REG_VRLSB                0x3C
 114
 115 static const u8 W83795_REG_IN_HL_LSB[] = {
 116         0x8e,   /* VSEN1-4 */
 117         0x90,   /* VSEN5-8 */
 118         0x92,   /* VSEN9-11 */
 119         0x94,   /* VTT, 3VDD, 3VSB, 3VBAT */
 120         0xa8,   /* VSEN12 */
 121         0xac,   /* VSEN13 */
 122         0x98,   /* VSEN14 */
 123         0x9c,   /* VSEN15 */
 124         0xa0,   /* VSEN16 */
 125         0xa4,   /* VSEN17 */
 126 };
 127
 128 #define IN_LSB_REG(index, type) \
 129         (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
 130         : (W83795_REG_IN_HL_LSB[(index)] + 1))
 131
 132 #define IN_LSB_SHIFT                    0
 133 #define IN_LSB_IDX                      1
 134 static const u8 IN_LSB_SHIFT_IDX[][2] = {
 135         /* High/Low LSB shift, LSB No. */
 136         {0x00, 0x00},   /* VSEN1 */
 137         {0x02, 0x00},   /* VSEN2 */
 138         {0x04, 0x00},   /* VSEN3 */
 139         {0x06, 0x00},   /* VSEN4 */
 140         {0x00, 0x01},   /* VSEN5 */
 141         {0x02, 0x01},   /* VSEN6 */
 142         {0x04, 0x01},   /* VSEN7 */
 143         {0x06, 0x01},   /* VSEN8 */
 144         {0x00, 0x02},   /* VSEN9 */
 145         {0x02, 0x02},   /* VSEN10 */
 146         {0x04, 0x02},   /* VSEN11 */
 147         {0x00, 0x03},   /* VTT */
 148         {0x02, 0x03},   /* 3VDD */
 149         {0x04, 0x03},   /* 3VSB */
 150         {0x06, 0x03},   /* VBAT */
 151         {0x06, 0x04},   /* VSEN12 */
 152         {0x06, 0x05},   /* VSEN13 */
 153         {0x06, 0x06},   /* VSEN14 */
 154         {0x06, 0x07},   /* VSEN15 */
 155         {0x06, 0x08},   /* VSEN16 */
 156         {0x06, 0x09},   /* VSEN17 */
 157 };
 158
 159
 160 #define W83795_REG_FAN(index)           (0x2E + (index))
 161 #define W83795_REG_FAN_MIN_HL(index)    (0xB6 + (index))
 162 #define W83795_REG_FAN_MIN_LSB(index)   (0xC4 + (index) / 2)
 163 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
 164         (((index) & 1) ? 4 : 0)
 165
 166 #define W83795_REG_VID_CTRL             0x6A
 167
 168 #define W83795_REG_ALARM(index)         (0x41 + (index))
 169 #define W83795_REG_BEEP(index)          (0x50 + (index))
 170
 171 #define W83795_REG_CLR_CHASSIS          0x4D
 172
 173
 174 #define W83795_REG_FCMS1                0x201
 175 #define W83795_REG_FCMS2                0x208
 176 #define W83795_REG_TFMR(index)          (0x202 + (index))
 177 #define W83795_REG_FOMC                 0x20F
 178
 179 #define W83795_REG_TSS(index)           (0x209 + (index))
 180
 181 #define TSS_MAP_RESERVED                0xff
 182 static const u8 tss_map[4][6] = {
 183         { 0,  1,  2,  3,  4,  5},
 184         { 6,  7,  8,  9,  0,  1},
 185         {10, 11, 12, 13,  2,  3},
 186         { 4,  5,  4,  5, TSS_MAP_RESERVED, TSS_MAP_RESERVED},
 187 };
 188
 189 #define PWM_OUTPUT                      0
 190 #define PWM_FREQ                        1
 191 #define PWM_START                       2
 192 #define PWM_NONSTOP                     3
 193 #define PWM_STOP_TIME                   4
 194 #define W83795_REG_PWM(index, nr)       (0x210 + (nr) * 8 + (index))
 195
 196 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 197 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 198 #define W83795_REG_TFTS                 0x250
 199
 200 #define TEMP_PWM_TTTI                   0
 201 #define TEMP_PWM_CTFS                   1
 202 #define TEMP_PWM_HCT                    2
 203 #define TEMP_PWM_HOT                    3
 204 #define W83795_REG_TTTI(index)          (0x260 + (index))
 205 #define W83795_REG_CTFS(index)          (0x268 + (index))
 206 #define W83795_REG_HT(index)            (0x270 + (index))
 207
 208 #define SF4_TEMP                        0
 209 #define SF4_PWM                         1
 210 #define W83795_REG_SF4_TEMP(temp_num, index) \
 211         (0x280 + 0x10 * (temp_num) + (index))
 212 #define W83795_REG_SF4_PWM(temp_num, index) \
 213         (0x288 + 0x10 * (temp_num) + (index))
 214
 215 #define W83795_REG_DTSC                 0x301
 216 #define W83795_REG_DTSE                 0x302
 217 #define W83795_REG_DTS(index)           (0x26 + (index))
 218 #define W83795_REG_PECI_TBASE(index)    (0x320 + (index))
 219
 220 #define DTS_CRIT                        0
 221 #define DTS_CRIT_HYST                   1
 222 #define DTS_WARN                        2
 223 #define DTS_WARN_HYST                   3
 224 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 225
 226 #define SETUP_PWM_DEFAULT               0
 227 #define SETUP_PWM_UPTIME                1
 228 #define SETUP_PWM_DOWNTIME              2
 229 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 230
 231 static inline u16 in_from_reg(u8 index, u16 val)
 232 {
 233         /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
 234         if (index >= 12 && index <= 14)
 235                 return val * 6;
 236         else
 237                 return val * 2;
 238 }
 239
 240 static inline u16 in_to_reg(u8 index, u16 val)
 241 {
 242         if (index >= 12 && index <= 14)
 243                 return val / 6;
 244         else
 245                 return val / 2;
 246 }
 247
 248 static inline unsigned long fan_from_reg(u16 val)
 249 {
 250         if ((val == 0xfff) || (val == 0))
 251                 return 0;
 252         return 1350000UL / val;
 253 }
 254
 255 static inline u16 fan_to_reg(long rpm)
 256 {
 257         if (rpm <= 0)
 258                 return 0x0fff;
 259         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 260 }
 261
 262 static inline unsigned long time_from_reg(u8 reg)
 263 {
 264         return reg * 100;
 265 }
 266
 267 static inline u8 time_to_reg(unsigned long val)
 268 {
 269         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 270 }
 271
 272 static inline long temp_from_reg(s8 reg)
 273 {
 274         return reg * 1000;
 275 }
 276
 277 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 278 {
 279         return SENSORS_LIMIT(val / 1000, min, max);
 280 }
 281
 282 static const u16 pwm_freq_cksel0[16] = {
 283         1024, 512, 341, 256, 205, 171, 146, 128,
 284         85, 64, 32, 16, 8, 4, 2, 1
 285 };
 286
 287 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 288 {
 289         unsigned long base_clock;
 290
 291         if (reg & 0x80) {
 292                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 293                 return base_clock / ((reg & 0x7f) + 1);
 294         } else
 295                 return pwm_freq_cksel0[reg & 0x0f];
 296 }
 297
 298 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 299 {
 300         unsigned long base_clock;
 301         u8 reg0, reg1;
 302         unsigned long best0, best1;
 303
 304         /* Best fit for cksel = 0 */
 305         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 306                 if (val > (pwm_freq_cksel0[reg0] +
 307                            pwm_freq_cksel0[reg0 + 1]) / 2)
 308                         break;
 309         }
 310         if (val < 375)  /* cksel = 1 can't beat this */
 311                 return reg0;
 312         best0 = pwm_freq_cksel0[reg0];
 313
 314         /* Best fit for cksel = 1 */
 315         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 316         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 317         best1 = base_clock / reg1;
 318         reg1 = 0x80 | (reg1 - 1);
 319
 320         /* Choose the closest one */
 321         if (abs(val - best0) > abs(val - best1))
 322                 return reg1;
 323         else
 324                 return reg0;
 325 }
 326
 327 enum chip_types {w83795g, w83795adg};
 328
 329 struct w83795_data {
 330         struct device *hwmon_dev;
 331         struct mutex update_lock;
 332         unsigned long last_updated;     /* In jiffies */
 333         enum chip_types chip_type;
 334
 335         u8 bank;
 336
 337         u32 has_in;             /* Enable monitor VIN or not */
 338         u8 has_dyn_in;          /* Only in2-0 can have this */
 339         u16 in[21][3];          /* Register value, read/high/low */
 340         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 341         u8 has_gain;            /* has gain: in17-20 * 8 */
 342
 343         u16 has_fan;            /* Enable fan14-1 or not */
 344         u16 fan[14];            /* Register value combine */
 345         u16 fan_min[14];        /* Register value combine */
 346
 347         u8 has_temp;            /* Enable monitor temp6-1 or not */
 348         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 349         u8 temp_read_vrlsb[6];
 350         u8 temp_mode;           /* Bit vector, 0 = TR, 1 = TD */
 351         u8 temp_src[3];         /* Register value */
 352
 353         u8 enable_dts;          /* Enable PECI and SB-TSI,
 354                                  * bit 0: =1 enable, =0 disable,
 355                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI */
 356         u8 has_dts;             /* Enable monitor DTS temp */
 357         s8 dts[8];              /* Register value */
 358         u8 dts_read_vrlsb[8];   /* Register value */
 359         s8 dts_ext[4];          /* Register value */
 360
 361         u8 has_pwm;             /* 795g supports 8 pwm, 795adg only supports 2,
 362                                  * no config register, only affected by chip
 363                                  * type */
 364         u8 pwm[8][5];           /* Register value, output, freq, start,
 365                                  *  non stop, stop time */
 366         u16 clkin;              /* CLKIN frequency in kHz */
 367         u8 pwm_fcms[2];         /* Register value */
 368         u8 pwm_tfmr[6];         /* Register value */
 369         u8 pwm_fomc;            /* Register value */
 370
 371         u16 target_speed[8];    /* Register value, target speed for speed
 372                                  * cruise */
 373         u8 tol_speed;           /* tolerance of target speed */
 374         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 375         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 376
 377         u8 setup_pwm[3];        /* Register value */
 378
 379         u8 alarms[6];           /* Register value */
 380         u8 beeps[6];            /* Register value */
 381
 382         char valid;
 383         char valid_limits;
 384         char valid_pwm_config;
 385 };
 386
 387 /*
 388  * Hardware access
 389  * We assume that nobdody can change the bank outside the driver.
 390  */
 391
 392 /* Must be called with data->update_lock held, except during initialization */
 393 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 394 {
 395         struct w83795_data *data = i2c_get_clientdata(client);
 396         int err;
 397
 398         /* If the same bank is already set, nothing to do */
 399         if ((data->bank & 0x07) == bank)
 400                 return 0;
 401
 402         /* Change to new bank, preserve all other bits */
 403         bank |= data->bank & ~0x07;
 404         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 405         if (err < 0) {
 406                 dev_err(&client->dev,
 407                         "Failed to set bank to %d, err %d\n",
 408                         (int)bank, err);
 409                 return err;
 410         }
 411         data->bank = bank;
 412
 413         return 0;
 414 }
 415
 416 /* Must be called with data->update_lock held, except during initialization */
 417 static u8 w83795_read(struct i2c_client *client, u16 reg)
 418 {
 419         int err;
 420
 421         err = w83795_set_bank(client, reg >> 8);
 422         if (err < 0)
 423                 return 0x00;    /* Arbitrary */
 424
 425         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 426         if (err < 0) {
 427                 dev_err(&client->dev,
 428                         "Failed to read from register 0x%03x, err %d\n",
 429                         (int)reg, err);
 430                 return 0x00;    /* Arbitrary */
 431         }
 432         return err;
 433 }
 434
 435 /* Must be called with data->update_lock held, except during initialization */
 436 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 437 {
 438         int err;
 439
 440         err = w83795_set_bank(client, reg >> 8);
 441         if (err < 0)
 442                 return err;
 443
 444         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 445         if (err < 0)
 446                 dev_err(&client->dev,
 447                         "Failed to write to register 0x%03x, err %d\n",
 448                         (int)reg, err);
 449         return err;
 450 }
 451
 452 static void w83795_update_limits(struct i2c_client *client)
 453 {
 454         struct w83795_data *data = i2c_get_clientdata(client);
 455         int i, limit;
 456
 457         /* Read the voltage limits */
 458         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 459                 if (!(data->has_in & (1 << i)))
 460                         continue;
 461                 data->in[i][IN_MAX] =
 462                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 463                 data->in[i][IN_LOW] =
 464                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 465         }
 466         for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
 467                 if ((i == 2 && data->chip_type == w83795adg) ||
 468                     (i >= 4 && !(data->has_in & (1 << (i + 11)))))
 469                         continue;
 470                 data->in_lsb[i][IN_MAX] =
 471                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
 472                 data->in_lsb[i][IN_LOW] =
 473                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
 474         }
 475
 476         /* Read the fan limits */
 477         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 478                 u8 lsb;
 479
 480                 /* Each register contains LSB for 2 fans, but we want to
 481                  * read it only once to save time */
 482                 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
 483                         lsb = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
 484
 485                 if (!(data->has_fan & (1 << i)))
 486                         continue;
 487                 data->fan_min[i] =
 488                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
 489                 data->fan_min[i] |=
 490                         (lsb >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
 491         }
 492
 493         /* Read the temperature limits */
 494         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 495                 if (!(data->has_temp & (1 << i)))
 496                         continue;
 497                 for (limit = TEMP_CRIT; limit <= TEMP_WARN_HYST; limit++)
 498                         data->temp[i][limit] =
 499                                 w83795_read(client, W83795_REG_TEMP[i][limit]);
 500         }
 501
 502         /* Read the DTS limits */
 503         if (data->enable_dts) {
 504                 for (limit = DTS_CRIT; limit <= DTS_WARN_HYST; limit++)
 505                         data->dts_ext[limit] =
 506                                 w83795_read(client, W83795_REG_DTS_EXT(limit));
 507         }
 508
 509         /* Read beep settings */
 510         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
 511                 data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i));
 512
 513         data->valid_limits = 1;
 514 }
 515
 516 static struct w83795_data *w83795_update_pwm_config(struct device *dev)
 517 {
 518         struct i2c_client *client = to_i2c_client(dev);
 519         struct w83795_data *data = i2c_get_clientdata(client);
 520         int i, tmp;
 521
 522         mutex_lock(&data->update_lock);
 523
 524         if (data->valid_pwm_config)
 525                 goto END;
 526
 527         /* Read temperature source selection */
 528         for (i = 0; i < ARRAY_SIZE(data->temp_src); i++)
 529                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
 530
 531         /* Read automatic fan speed control settings */
 532         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
 533         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
 534         for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
 535                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
 536         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
 537         for (i = 0; i < data->has_pwm; i++) {
 538                 for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
 539                         data->pwm[i][tmp] =
 540                                 w83795_read(client, W83795_REG_PWM(i, tmp));
 541         }
 542         for (i = 0; i < ARRAY_SIZE(data->target_speed); i++) {
 543                 data->target_speed[i] =
 544                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
 545                 data->target_speed[i] |=
 546                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
 547         }
 548         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
 549
 550         for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
 551                 data->pwm_temp[i][TEMP_PWM_TTTI] =
 552                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
 553                 data->pwm_temp[i][TEMP_PWM_CTFS] =
 554                         w83795_read(client, W83795_REG_CTFS(i));
 555                 tmp = w83795_read(client, W83795_REG_HT(i));
 556                 data->pwm_temp[i][TEMP_PWM_HCT] = tmp >> 4;
 557                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
 558         }
 559
 560         /* Read SmartFanIV trip points */
 561         for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
 562                 for (tmp = 0; tmp < 7; tmp++) {
 563                         data->sf4_reg[i][SF4_TEMP][tmp] =
 564                                 w83795_read(client,
 565                                             W83795_REG_SF4_TEMP(i, tmp));
 566                         data->sf4_reg[i][SF4_PWM][tmp] =
 567                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
 568                 }
 569         }
 570
 571         /* Read setup PWM */
 572         for (i = 0; i < ARRAY_SIZE(data->setup_pwm); i++)
 573                 data->setup_pwm[i] =
 574                         w83795_read(client, W83795_REG_SETUP_PWM(i));
 575
 576         data->valid_pwm_config = 1;
 577
 578 END:
 579         mutex_unlock(&data->update_lock);
 580         return data;
 581 }
 582
 583 static struct w83795_data *w83795_update_device(struct device *dev)
 584 {
 585         struct i2c_client *client = to_i2c_client(dev);
 586         struct w83795_data *data = i2c_get_clientdata(client);
 587         u16 tmp;
 588         int i;
 589
 590         mutex_lock(&data->update_lock);
 591
 592         if (!data->valid_limits)
 593                 w83795_update_limits(client);
 594
 595         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 596               || !data->valid))
 597                 goto END;
 598
 599         /* Update the voltages value */
 600         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 601                 if (!(data->has_in & (1 << i)))
 602                         continue;
 603                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 604                 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
 605                 data->in[i][IN_READ] = tmp;
 606         }
 607
 608         /* in0-2 can have dynamic limits (W83795G only) */
 609         if (data->has_dyn_in) {
 610                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 611                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 612
 613                 for (i = 0; i < 3; i++) {
 614                         if (!(data->has_dyn_in & (1 << i)))
 615                                 continue;
 616                         data->in[i][IN_MAX] =
 617                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 618                         data->in[i][IN_LOW] =
 619                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 620                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 621                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 622                 }
 623         }
 624
 625         /* Update fan */
 626         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 627                 if (!(data->has_fan & (1 << i)))
 628                         continue;
 629                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 630                 data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4;
 631         }
 632
 633         /* Update temperature */
 634         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 635                 data->temp[i][TEMP_READ] =
 636                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 637                 data->temp_read_vrlsb[i] =
 638                         w83795_read(client, W83795_REG_VRLSB);
 639         }
 640
 641         /* Update dts temperature */
 642         if (data->enable_dts) {
 643                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 644                         if (!(data->has_dts & (1 << i)))
 645                                 continue;
 646                         data->dts[i] =
 647                                 w83795_read(client, W83795_REG_DTS(i));
 648                         data->dts_read_vrlsb[i] =
 649                                 w83795_read(client, W83795_REG_VRLSB);
 650                 }
 651         }
 652
 653         /* Update pwm output */
 654         for (i = 0; i < data->has_pwm; i++) {
 655                 data->pwm[i][PWM_OUTPUT] =
 656                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 657         }
 658
 659         /* update alarm */
 660         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
 661                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 662
 663         data->last_updated = jiffies;
 664         data->valid = 1;
 665
 666 END:
 667         mutex_unlock(&data->update_lock);
 668         return data;
 669 }
 670
 671 /*
 672  * Sysfs attributes
 673  */
 674
 675 #define ALARM_STATUS      0
 676 #define BEEP_ENABLE       1
 677 static ssize_t
 678 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 679 {
 680         struct w83795_data *data = w83795_update_device(dev);
 681         struct sensor_device_attribute_2 *sensor_attr =
 682             to_sensor_dev_attr_2(attr);
 683         int nr = sensor_attr->nr;
 684         int index = sensor_attr->index >> 3;
 685         int bit = sensor_attr->index & 0x07;
 686         u8 val;
 687
 688         if (nr == ALARM_STATUS)
 689                 val = (data->alarms[index] >> bit) & 1;
 690         else            /* BEEP_ENABLE */
 691                 val = (data->beeps[index] >> bit) & 1;
 692
 693         return sprintf(buf, "%u\n", val);
 694 }
 695
 696 static ssize_t
 697 store_beep(struct device *dev, struct device_attribute *attr,
 698            const char *buf, size_t count)
 699 {
 700         struct i2c_client *client = to_i2c_client(dev);
 701         struct w83795_data *data = i2c_get_clientdata(client);
 702         struct sensor_device_attribute_2 *sensor_attr =
 703             to_sensor_dev_attr_2(attr);
 704         int index = sensor_attr->index >> 3;
 705         int shift = sensor_attr->index & 0x07;
 706         u8 beep_bit = 1 << shift;
 707         unsigned long val;
 708
 709         if (strict_strtoul(buf, 10, &val) < 0)
 710                 return -EINVAL;
 711         if (val != 0 && val != 1)
 712                 return -EINVAL;
 713
 714         mutex_lock(&data->update_lock);
 715         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 716         data->beeps[index] &= ~beep_bit;
 717         data->beeps[index] |= val << shift;
 718         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 719         mutex_unlock(&data->update_lock);
 720
 721         return count;
 722 }
 723
 724 /* Write 0 to clear chassis alarm */
 725 static ssize_t
 726 store_chassis_clear(struct device *dev,
 727                     struct device_attribute *attr, const char *buf,
 728                     size_t count)
 729 {
 730         struct i2c_client *client = to_i2c_client(dev);
 731         struct w83795_data *data = i2c_get_clientdata(client);
 732         unsigned long val;
 733
 734         if (strict_strtoul(buf, 10, &val) < 0 || val != 0)
 735                 return -EINVAL;
 736
 737         mutex_lock(&data->update_lock);
 738         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 739         val |= 0x80;
 740         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 741         mutex_unlock(&data->update_lock);
 742         return count;
 743 }
 744
 745 #define FAN_INPUT     0
 746 #define FAN_MIN       1
 747 static ssize_t
 748 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 749 {
 750         struct sensor_device_attribute_2 *sensor_attr =
 751             to_sensor_dev_attr_2(attr);
 752         int nr = sensor_attr->nr;
 753         int index = sensor_attr->index;
 754         struct w83795_data *data = w83795_update_device(dev);
 755         u16 val;
 756
 757         if (nr == FAN_INPUT)
 758                 val = data->fan[index] & 0x0fff;
 759         else
 760                 val = data->fan_min[index] & 0x0fff;
 761
 762         return sprintf(buf, "%lu\n", fan_from_reg(val));
 763 }
 764
 765 static ssize_t
 766 store_fan_min(struct device *dev, struct device_attribute *attr,
 767               const char *buf, size_t count)
 768 {
 769         struct sensor_device_attribute_2 *sensor_attr =
 770             to_sensor_dev_attr_2(attr);
 771         int index = sensor_attr->index;
 772         struct i2c_client *client = to_i2c_client(dev);
 773         struct w83795_data *data = i2c_get_clientdata(client);
 774         unsigned long val;
 775
 776         if (strict_strtoul(buf, 10, &val))
 777                 return -EINVAL;
 778         val = fan_to_reg(val);
 779
 780         mutex_lock(&data->update_lock);
 781         data->fan_min[index] = val;
 782         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 783         val &= 0x0f;
 784         if (index & 1) {
 785                 val <<= 4;
 786                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 787                        & 0x0f;
 788         } else {
 789                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 790                        & 0xf0;
 791         }
 792         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 793         mutex_unlock(&data->update_lock);
 794
 795         return count;
 796 }
 797
 798 static ssize_t
 799 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 800 {
 801         struct w83795_data *data;
 802         struct sensor_device_attribute_2 *sensor_attr =
 803             to_sensor_dev_attr_2(attr);
 804         int nr = sensor_attr->nr;
 805         int index = sensor_attr->index;
 806         unsigned int val;
 807
 808         data = nr == PWM_OUTPUT ? w83795_update_device(dev)
 809                                 : w83795_update_pwm_config(dev);
 810
 811         switch (nr) {
 812         case PWM_STOP_TIME:
 813                 val = time_from_reg(data->pwm[index][nr]);
 814                 break;
 815         case PWM_FREQ:
 816                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 817                 break;
 818         default:
 819                 val = data->pwm[index][nr];
 820                 break;
 821         }
 822
 823         return sprintf(buf, "%u\n", val);
 824 }
 825
 826 static ssize_t
 827 store_pwm(struct device *dev, struct device_attribute *attr,
 828           const char *buf, size_t count)
 829 {
 830         struct i2c_client *client = to_i2c_client(dev);
 831         struct w83795_data *data = i2c_get_clientdata(client);
 832         struct sensor_device_attribute_2 *sensor_attr =
 833             to_sensor_dev_attr_2(attr);
 834         int nr = sensor_attr->nr;
 835         int index = sensor_attr->index;
 836         unsigned long val;
 837
 838         if (strict_strtoul(buf, 10, &val) < 0)
 839                 return -EINVAL;
 840
 841         mutex_lock(&data->update_lock);
 842         switch (nr) {
 843         case PWM_STOP_TIME:
 844                 val = time_to_reg(val);
 845                 break;
 846         case PWM_FREQ:
 847                 val = pwm_freq_to_reg(val, data->clkin);
 848                 break;
 849         default:
 850                 val = SENSORS_LIMIT(val, 0, 0xff);
 851                 break;
 852         }
 853         w83795_write(client, W83795_REG_PWM(index, nr), val);
 854         data->pwm[index][nr] = val;
 855         mutex_unlock(&data->update_lock);
 856         return count;
 857 }
 858
 859 static ssize_t
 860 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 861 {
 862         struct sensor_device_attribute_2 *sensor_attr =
 863             to_sensor_dev_attr_2(attr);
 864         struct w83795_data *data = w83795_update_pwm_config(dev);
 865         int index = sensor_attr->index;
 866         u8 tmp;
 867
 868         /* Speed cruise mode */
 869         if (data->pwm_fcms[0] & (1 << index)) {
 870                 tmp = 2;
 871                 goto out;
 872         }
 873         /* Thermal cruise or SmartFan IV mode */
 874         for (tmp = 0; tmp < 6; tmp++) {
 875                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 876                         tmp = 3;
 877                         goto out;
 878                 }
 879         }
 880         /* Manual mode */
 881         tmp = 1;
 882
 883 out:
 884         return sprintf(buf, "%u\n", tmp);
 885 }
 886
 887 static ssize_t
 888 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 889           const char *buf, size_t count)
 890 {
 891         struct i2c_client *client = to_i2c_client(dev);
 892         struct w83795_data *data = w83795_update_pwm_config(dev);
 893         struct sensor_device_attribute_2 *sensor_attr =
 894             to_sensor_dev_attr_2(attr);
 895         int index = sensor_attr->index;
 896         unsigned long val;
 897         int i;
 898
 899         if (strict_strtoul(buf, 10, &val) < 0)
 900                 return -EINVAL;
 901         if (val < 1 || val > 2)
 902                 return -EINVAL;
 903
 904         mutex_lock(&data->update_lock);
 905         switch (val) {
 906         case 1:
 907                 /* Clear speed cruise mode bits */
 908                 data->pwm_fcms[0] &= ~(1 << index);
 909                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 910                 /* Clear thermal cruise mode bits */
 911                 for (i = 0; i < 6; i++) {
 912                         data->pwm_tfmr[i] &= ~(1 << index);
 913                         w83795_write(client, W83795_REG_TFMR(i),
 914                                 data->pwm_tfmr[i]);
 915                 }
 916                 break;
 917         case 2:
 918                 data->pwm_fcms[0] |= (1 << index);
 919                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 920                 break;
 921         }
 922         mutex_unlock(&data->update_lock);
 923         return count;
 924 }
 925
 926 static ssize_t
 927 show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
 928 {
 929         struct w83795_data *data = w83795_update_pwm_config(dev);
 930         int index = to_sensor_dev_attr_2(attr)->index;
 931         unsigned int mode;
 932
 933         if (data->pwm_fomc & (1 << index))
 934                 mode = 0;       /* DC */
 935         else
 936                 mode = 1;       /* PWM */
 937
 938         return sprintf(buf, "%u\n", mode);
 939 }
 940
 941 /*
 942  * Check whether a given temperature source can ever be useful.
 943  * Returns the number of selectable temperature channels which are
 944  * enabled.
 945  */
 946 static int w83795_tss_useful(const struct w83795_data *data, int tsrc)
 947 {
 948         int useful = 0, i;
 949
 950         for (i = 0; i < 4; i++) {
 951                 if (tss_map[i][tsrc] == TSS_MAP_RESERVED)
 952                         continue;
 953                 if (tss_map[i][tsrc] < 6)       /* Analog */
 954                         useful += (data->has_temp >> tss_map[i][tsrc]) & 1;
 955                 else                            /* Digital */
 956                         useful += (data->has_dts >> (tss_map[i][tsrc] - 6)) & 1;
 957         }
 958
 959         return useful;
 960 }
 961
 962 static ssize_t
 963 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
 964 {
 965         struct sensor_device_attribute_2 *sensor_attr =
 966             to_sensor_dev_attr_2(attr);
 967         struct w83795_data *data = w83795_update_pwm_config(dev);
 968         int index = sensor_attr->index;
 969         u8 tmp = data->temp_src[index / 2];
 970
 971         if (index & 1)
 972                 tmp >>= 4;      /* Pick high nibble */
 973         else
 974                 tmp &= 0x0f;    /* Pick low nibble */
 975
 976         /* Look-up the actual temperature channel number */
 977         if (tmp >= 4 || tss_map[tmp][index] == TSS_MAP_RESERVED)
 978                 return -EINVAL;         /* Shouldn't happen */
 979
 980         return sprintf(buf, "%u\n", (unsigned int)tss_map[tmp][index] + 1);
 981 }
 982
 983 static ssize_t
 984 store_temp_src(struct device *dev, struct device_attribute *attr,
 985           const char *buf, size_t count)
 986 {
 987         struct i2c_client *client = to_i2c_client(dev);
 988         struct w83795_data *data = w83795_update_pwm_config(dev);
 989         struct sensor_device_attribute_2 *sensor_attr =
 990             to_sensor_dev_attr_2(attr);
 991         int index = sensor_attr->index;
 992         int tmp;
 993         unsigned long channel;
 994         u8 val = index / 2;
 995
 996         if (strict_strtoul(buf, 10, &channel) < 0 ||
 997             channel < 1 || channel > 14)
 998                 return -EINVAL;
 999
1000         /* Check if request can be fulfilled */
1001         for (tmp = 0; tmp < 4; tmp++) {
1002                 if (tss_map[tmp][index] == channel - 1)
1003                         break;
1004         }
1005         if (tmp == 4)   /* No match */
1006                 return -EINVAL;
1007
1008         mutex_lock(&data->update_lock);
1009         if (index & 1) {
1010                 tmp <<= 4;
1011                 data->temp_src[val] &= 0x0f;
1012         } else {
1013                 data->temp_src[val] &= 0xf0;
1014         }
1015         data->temp_src[val] |= tmp;
1016         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
1017         mutex_unlock(&data->update_lock);
1018
1019         return count;
1020 }
1021
1022 #define TEMP_PWM_ENABLE   0
1023 #define TEMP_PWM_FAN_MAP  1
1024 static ssize_t
1025 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1026                      char *buf)
1027 {
1028         struct w83795_data *data = w83795_update_pwm_config(dev);
1029         struct sensor_device_attribute_2 *sensor_attr =
1030             to_sensor_dev_attr_2(attr);
1031         int nr = sensor_attr->nr;
1032         int index = sensor_attr->index;
1033         u8 tmp = 0xff;
1034
1035         switch (nr) {
1036         case TEMP_PWM_ENABLE:
1037                 tmp = (data->pwm_fcms[1] >> index) & 1;
1038                 if (tmp)
1039                         tmp = 4;
1040                 else
1041                         tmp = 3;
1042                 break;
1043         case TEMP_PWM_FAN_MAP:
1044                 tmp = data->pwm_tfmr[index];
1045                 break;
1046         }
1047
1048         return sprintf(buf, "%u\n", tmp);
1049 }
1050
1051 static ssize_t
1052 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1053           const char *buf, size_t count)
1054 {
1055         struct i2c_client *client = to_i2c_client(dev);
1056         struct w83795_data *data = w83795_update_pwm_config(dev);
1057         struct sensor_device_attribute_2 *sensor_attr =
1058             to_sensor_dev_attr_2(attr);
1059         int nr = sensor_attr->nr;
1060         int index = sensor_attr->index;
1061         unsigned long tmp;
1062
1063         if (strict_strtoul(buf, 10, &tmp) < 0)
1064                 return -EINVAL;
1065
1066         switch (nr) {
1067         case TEMP_PWM_ENABLE:
1068                 if (tmp != 3 && tmp != 4)
1069                         return -EINVAL;
1070                 tmp -= 3;
1071                 mutex_lock(&data->update_lock);
1072                 data->pwm_fcms[1] &= ~(1 << index);
1073                 data->pwm_fcms[1] |= tmp << index;
1074                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
1075                 mutex_unlock(&data->update_lock);
1076                 break;
1077         case TEMP_PWM_FAN_MAP:
1078                 mutex_lock(&data->update_lock);
1079                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
1080                 w83795_write(client, W83795_REG_TFMR(index), tmp);
1081                 data->pwm_tfmr[index] = tmp;
1082                 mutex_unlock(&data->update_lock);
1083                 break;
1084         }
1085         return count;
1086 }
1087
1088 #define FANIN_TARGET   0
1089 #define FANIN_TOL      1
1090 static ssize_t
1091 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
1092 {
1093         struct w83795_data *data = w83795_update_pwm_config(dev);
1094         struct sensor_device_attribute_2 *sensor_attr =
1095             to_sensor_dev_attr_2(attr);
1096         int nr = sensor_attr->nr;
1097         int index = sensor_attr->index;
1098         u16 tmp = 0;
1099
1100         switch (nr) {
1101         case FANIN_TARGET:
1102                 tmp = fan_from_reg(data->target_speed[index]);
1103                 break;
1104         case FANIN_TOL:
1105                 tmp = data->tol_speed;
1106                 break;
1107         }
1108
1109         return sprintf(buf, "%u\n", tmp);
1110 }
1111
1112 static ssize_t
1113 store_fanin(struct device *dev, struct device_attribute *attr,
1114           const char *buf, size_t count)
1115 {
1116         struct i2c_client *client = to_i2c_client(dev);
1117         struct w83795_data *data = i2c_get_clientdata(client);
1118         struct sensor_device_attribute_2 *sensor_attr =
1119             to_sensor_dev_attr_2(attr);
1120         int nr = sensor_attr->nr;
1121         int index = sensor_attr->index;
1122         unsigned long val;
1123
1124         if (strict_strtoul(buf, 10, &val) < 0)
1125                 return -EINVAL;
1126
1127         mutex_lock(&data->update_lock);
1128         switch (nr) {
1129         case FANIN_TARGET:
1130                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
1131                 w83795_write(client, W83795_REG_FTSH(index), val >> 4);
1132                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1133                 data->target_speed[index] = val;
1134                 break;
1135         case FANIN_TOL:
1136                 val = SENSORS_LIMIT(val, 0, 0x3f);
1137                 w83795_write(client, W83795_REG_TFTS, val);
1138                 data->tol_speed = val;
1139                 break;
1140         }
1141         mutex_unlock(&data->update_lock);
1142
1143         return count;
1144 }
1145
1146
1147 static ssize_t
1148 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1149 {
1150         struct w83795_data *data = w83795_update_pwm_config(dev);
1151         struct sensor_device_attribute_2 *sensor_attr =
1152             to_sensor_dev_attr_2(attr);
1153         int nr = sensor_attr->nr;
1154         int index = sensor_attr->index;
1155         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1156
1157         return sprintf(buf, "%ld\n", tmp);
1158 }
1159
1160 static ssize_t
1161 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1162           const char *buf, size_t count)
1163 {
1164         struct i2c_client *client = to_i2c_client(dev);
1165         struct w83795_data *data = i2c_get_clientdata(client);
1166         struct sensor_device_attribute_2 *sensor_attr =
1167             to_sensor_dev_attr_2(attr);
1168         int nr = sensor_attr->nr;
1169         int index = sensor_attr->index;
1170         unsigned long val;
1171         u8 tmp;
1172
1173         if (strict_strtoul(buf, 10, &val) < 0)
1174                 return -EINVAL;
1175         val /= 1000;
1176
1177         mutex_lock(&data->update_lock);
1178         switch (nr) {
1179         case TEMP_PWM_TTTI:
1180                 val = SENSORS_LIMIT(val, 0, 0x7f);
1181                 w83795_write(client, W83795_REG_TTTI(index), val);
1182                 break;
1183         case TEMP_PWM_CTFS:
1184                 val = SENSORS_LIMIT(val, 0, 0x7f);
1185                 w83795_write(client, W83795_REG_CTFS(index), val);
1186                 break;
1187         case TEMP_PWM_HCT:
1188                 val = SENSORS_LIMIT(val, 0, 0x0f);
1189                 tmp = w83795_read(client, W83795_REG_HT(index));
1190                 tmp &= 0x0f;
1191                 tmp |= (val << 4) & 0xf0;
1192                 w83795_write(client, W83795_REG_HT(index), tmp);
1193                 break;
1194         case TEMP_PWM_HOT:
1195                 val = SENSORS_LIMIT(val, 0, 0x0f);
1196                 tmp = w83795_read(client, W83795_REG_HT(index));
1197                 tmp &= 0xf0;
1198                 tmp |= val & 0x0f;
1199                 w83795_write(client, W83795_REG_HT(index), tmp);
1200                 break;
1201         }
1202         data->pwm_temp[index][nr] = val;
1203         mutex_unlock(&data->update_lock);
1204
1205         return count;
1206 }
1207
1208 static ssize_t
1209 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1210 {
1211         struct w83795_data *data = w83795_update_pwm_config(dev);
1212         struct sensor_device_attribute_2 *sensor_attr =
1213             to_sensor_dev_attr_2(attr);
1214         int nr = sensor_attr->nr;
1215         int index = sensor_attr->index;
1216
1217         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1218 }
1219
1220 static ssize_t
1221 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1222           const char *buf, size_t count)
1223 {
1224         struct i2c_client *client = to_i2c_client(dev);
1225         struct w83795_data *data = i2c_get_clientdata(client);
1226         struct sensor_device_attribute_2 *sensor_attr =
1227             to_sensor_dev_attr_2(attr);
1228         int nr = sensor_attr->nr;
1229         int index = sensor_attr->index;
1230         unsigned long val;
1231
1232         if (strict_strtoul(buf, 10, &val) < 0)
1233                 return -EINVAL;
1234
1235         mutex_lock(&data->update_lock);
1236         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1237         data->sf4_reg[index][SF4_PWM][nr] = val;
1238         mutex_unlock(&data->update_lock);
1239
1240         return count;
1241 }
1242
1243 static ssize_t
1244 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1245 {
1246         struct w83795_data *data = w83795_update_pwm_config(dev);
1247         struct sensor_device_attribute_2 *sensor_attr =
1248             to_sensor_dev_attr_2(attr);
1249         int nr = sensor_attr->nr;
1250         int index = sensor_attr->index;
1251
1252         return sprintf(buf, "%u\n",
1253                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1254 }
1255
1256 static ssize_t
1257 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1258           const char *buf, size_t count)
1259 {
1260         struct i2c_client *client = to_i2c_client(dev);
1261         struct w83795_data *data = i2c_get_clientdata(client);
1262         struct sensor_device_attribute_2 *sensor_attr =
1263             to_sensor_dev_attr_2(attr);
1264         int nr = sensor_attr->nr;
1265         int index = sensor_attr->index;
1266         unsigned long val;
1267
1268         if (strict_strtoul(buf, 10, &val) < 0)
1269                 return -EINVAL;
1270         val /= 1000;
1271
1272         mutex_lock(&data->update_lock);
1273         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1274         data->sf4_reg[index][SF4_TEMP][nr] = val;
1275         mutex_unlock(&data->update_lock);
1276
1277         return count;
1278 }
1279
1280
1281 static ssize_t
1282 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1283 {
1284         struct sensor_device_attribute_2 *sensor_attr =
1285             to_sensor_dev_attr_2(attr);
1286         int nr = sensor_attr->nr;
1287         int index = sensor_attr->index;
1288         struct w83795_data *data = w83795_update_device(dev);
1289         long temp = temp_from_reg(data->temp[index][nr]);
1290
1291         if (nr == TEMP_READ)
1292                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1293         return sprintf(buf, "%ld\n", temp);
1294 }
1295
1296 static ssize_t
1297 store_temp(struct device *dev, struct device_attribute *attr,
1298            const char *buf, size_t count)
1299 {
1300         struct sensor_device_attribute_2 *sensor_attr =
1301             to_sensor_dev_attr_2(attr);
1302         int nr = sensor_attr->nr;
1303         int index = sensor_attr->index;
1304         struct i2c_client *client = to_i2c_client(dev);
1305         struct w83795_data *data = i2c_get_clientdata(client);
1306         long tmp;
1307
1308         if (strict_strtol(buf, 10, &tmp) < 0)
1309                 return -EINVAL;
1310
1311         mutex_lock(&data->update_lock);
1312         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1313         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1314         mutex_unlock(&data->update_lock);
1315         return count;
1316 }
1317
1318
1319 static ssize_t
1320 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1321 {
1322         struct w83795_data *data = dev_get_drvdata(dev);
1323         int tmp;
1324
1325         if (data->enable_dts & 2)
1326                 tmp = 5;
1327         else
1328                 tmp = 6;
1329
1330         return sprintf(buf, "%d\n", tmp);
1331 }
1332
1333 static ssize_t
1334 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1335 {
1336         struct sensor_device_attribute_2 *sensor_attr =
1337             to_sensor_dev_attr_2(attr);
1338         int index = sensor_attr->index;
1339         struct w83795_data *data = w83795_update_device(dev);
1340         long temp = temp_from_reg(data->dts[index]);
1341
1342         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1343         return sprintf(buf, "%ld\n", temp);
1344 }
1345
1346 static ssize_t
1347 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1348 {
1349         struct sensor_device_attribute_2 *sensor_attr =
1350             to_sensor_dev_attr_2(attr);
1351         int nr = sensor_attr->nr;
1352         struct w83795_data *data = dev_get_drvdata(dev);
1353         long temp = temp_from_reg(data->dts_ext[nr]);
1354
1355         return sprintf(buf, "%ld\n", temp);
1356 }
1357
1358 static ssize_t
1359 store_dts_ext(struct device *dev, struct device_attribute *attr,
1360            const char *buf, size_t count)
1361 {
1362         struct sensor_device_attribute_2 *sensor_attr =
1363             to_sensor_dev_attr_2(attr);
1364         int nr = sensor_attr->nr;
1365         struct i2c_client *client = to_i2c_client(dev);
1366         struct w83795_data *data = i2c_get_clientdata(client);
1367         long tmp;
1368
1369         if (strict_strtol(buf, 10, &tmp) < 0)
1370                 return -EINVAL;
1371
1372         mutex_lock(&data->update_lock);
1373         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1374         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1375         mutex_unlock(&data->update_lock);
1376         return count;
1377 }
1378
1379
1380 static ssize_t
1381 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1382 {
1383         struct w83795_data *data = dev_get_drvdata(dev);
1384         struct sensor_device_attribute_2 *sensor_attr =
1385             to_sensor_dev_attr_2(attr);
1386         int index = sensor_attr->index;
1387         int tmp;
1388
1389         if (data->temp_mode & (1 << index))
1390                 tmp = 3;        /* Thermal diode */
1391         else
1392                 tmp = 4;        /* Thermistor */
1393
1394         return sprintf(buf, "%d\n", tmp);
1395 }
1396
1397 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1398 static ssize_t
1399 store_temp_mode(struct device *dev, struct device_attribute *attr,
1400                 const char *buf, size_t count)
1401 {
1402         struct i2c_client *client = to_i2c_client(dev);
1403         struct w83795_data *data = i2c_get_clientdata(client);
1404         struct sensor_device_attribute_2 *sensor_attr =
1405             to_sensor_dev_attr_2(attr);
1406         int index = sensor_attr->index;
1407         int reg_shift;
1408         unsigned long val;
1409         u8 tmp;
1410
1411         if (strict_strtoul(buf, 10, &val) < 0)
1412                 return -EINVAL;
1413         if ((val != 4) && (val != 3))
1414                 return -EINVAL;
1415
1416         mutex_lock(&data->update_lock);
1417         if (val == 3) {
1418                 /* Thermal diode */
1419                 val = 0x01;
1420                 data->temp_mode |= 1 << index;
1421         } else if (val == 4) {
1422                 /* Thermistor */
1423                 val = 0x03;
1424                 data->temp_mode &= ~(1 << index);
1425         }
1426
1427         reg_shift = 2 * index;
1428         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1429         tmp &= ~(0x03 << reg_shift);
1430         tmp |= val << reg_shift;
1431         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1432
1433         mutex_unlock(&data->update_lock);
1434         return count;
1435 }
1436
1437
1438 /* show/store VIN */
1439 static ssize_t
1440 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1441 {
1442         struct sensor_device_attribute_2 *sensor_attr =
1443             to_sensor_dev_attr_2(attr);
1444         int nr = sensor_attr->nr;
1445         int index = sensor_attr->index;
1446         struct w83795_data *data = w83795_update_device(dev);
1447         u16 val = data->in[index][nr];
1448         u8 lsb_idx;
1449
1450         switch (nr) {
1451         case IN_READ:
1452                 /* calculate this value again by sensors as sensors3.conf */
1453                 if ((index >= 17) &&
1454                     !((data->has_gain >> (index - 17)) & 1))
1455                         val *= 8;
1456                 break;
1457         case IN_MAX:
1458         case IN_LOW:
1459                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1460                 val <<= 2;
1461                 val |= (data->in_lsb[lsb_idx][nr] >>
1462                         IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]) & 0x03;
1463                 if ((index >= 17) &&
1464                     !((data->has_gain >> (index - 17)) & 1))
1465                         val *= 8;
1466                 break;
1467         }
1468         val = in_from_reg(index, val);
1469
1470         return sprintf(buf, "%d\n", val);
1471 }
1472
1473 static ssize_t
1474 store_in(struct device *dev, struct device_attribute *attr,
1475          const char *buf, size_t count)
1476 {
1477         struct sensor_device_attribute_2 *sensor_attr =
1478             to_sensor_dev_attr_2(attr);
1479         int nr = sensor_attr->nr;
1480         int index = sensor_attr->index;
1481         struct i2c_client *client = to_i2c_client(dev);
1482         struct w83795_data *data = i2c_get_clientdata(client);
1483         unsigned long val;
1484         u8 tmp;
1485         u8 lsb_idx;
1486
1487         if (strict_strtoul(buf, 10, &val) < 0)
1488                 return -EINVAL;
1489         val = in_to_reg(index, val);
1490
1491         if ((index >= 17) &&
1492             !((data->has_gain >> (index - 17)) & 1))
1493                 val /= 8;
1494         val = SENSORS_LIMIT(val, 0, 0x3FF);
1495         mutex_lock(&data->update_lock);
1496
1497         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1498         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1499         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1500         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1501         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1502         data->in_lsb[lsb_idx][nr] = tmp;
1503
1504         tmp = (val >> 2) & 0xff;
1505         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1506         data->in[index][nr] = tmp;
1507
1508         mutex_unlock(&data->update_lock);
1509         return count;
1510 }
1511
1512
1513 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1514 static ssize_t
1515 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1516 {
1517         struct sensor_device_attribute_2 *sensor_attr =
1518             to_sensor_dev_attr_2(attr);
1519         int nr = sensor_attr->nr;
1520         struct w83795_data *data = w83795_update_pwm_config(dev);
1521         u16 val = data->setup_pwm[nr];
1522
1523         switch (nr) {
1524         case SETUP_PWM_UPTIME:
1525         case SETUP_PWM_DOWNTIME:
1526                 val = time_from_reg(val);
1527                 break;
1528         }
1529
1530         return sprintf(buf, "%d\n", val);
1531 }
1532
1533 static ssize_t
1534 store_sf_setup(struct device *dev, struct device_attribute *attr,
1535          const char *buf, size_t count)
1536 {
1537         struct sensor_device_attribute_2 *sensor_attr =
1538             to_sensor_dev_attr_2(attr);
1539         int nr = sensor_attr->nr;
1540         struct i2c_client *client = to_i2c_client(dev);
1541         struct w83795_data *data = i2c_get_clientdata(client);
1542         unsigned long val;
1543
1544         if (strict_strtoul(buf, 10, &val) < 0)
1545                 return -EINVAL;
1546
1547         switch (nr) {
1548         case SETUP_PWM_DEFAULT:
1549                 val = SENSORS_LIMIT(val, 0, 0xff);
1550                 break;
1551         case SETUP_PWM_UPTIME:
1552         case SETUP_PWM_DOWNTIME:
1553                 val = time_to_reg(val);
1554                 if (val == 0)
1555                         return -EINVAL;
1556                 break;
1557         }
1558
1559         mutex_lock(&data->update_lock);
1560         data->setup_pwm[nr] = val;
1561         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1562         mutex_unlock(&data->update_lock);
1563         return count;
1564 }
1565 #endif
1566
1567
1568 #define NOT_USED                        -1
1569
1570 /* Don't change the attribute order, _max and _min are accessed by index
1571  * somewhere else in the code */
1572 #define SENSOR_ATTR_IN(index) {                                         \
1573         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1574                 IN_READ, index), \
1575         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1576                 store_in, IN_MAX, index),                               \
1577         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1578                 store_in, IN_LOW, index),                               \
1579         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1580                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1581         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1582                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1583                 index + ((index > 14) ? 1 : 0)) }
1584
1585 #define SENSOR_ATTR_FAN(index) {                                        \
1586         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1587                 NULL, FAN_INPUT, index - 1), \
1588         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1589                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1590         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1591                 NULL, ALARM_STATUS, index + 31),                        \
1592         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1593                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1594
1595 #define SENSOR_ATTR_PWM(index) {                                        \
1596         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1597                 store_pwm, PWM_OUTPUT, index - 1),                      \
1598         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1599                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1600         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1601                 show_pwm, store_pwm, PWM_START, index - 1),             \
1602         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1603                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1604         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,     \
1605                 show_pwm, store_pwm, PWM_FREQ, index - 1),       \
1606         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1607                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1608         SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO,                       \
1609                 show_pwm_mode, NULL, NOT_USED, index - 1),              \
1610         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1611                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1612
1613 #define SENSOR_ATTR_DTS(index) {                                        \
1614         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1615                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1616         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1617                 NULL, NOT_USED, index - 7),                             \
1618         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1619                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1620         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1621                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1622         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1623                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1624         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1625                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1626         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1627                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1628         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1629                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1630
1631 #define SENSOR_ATTR_TEMP(index) {                                       \
1632         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1633                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1634         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1635                 NULL, TEMP_READ, index - 1),                            \
1636         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1637                 store_temp, TEMP_CRIT, index - 1),                      \
1638         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1639                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1640         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1641                 store_temp, TEMP_WARN, index - 1),                      \
1642         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1643                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1644         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1645                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1646                 index + (index > 4 ? 11 : 17)),                         \
1647         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1648                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1649                 index + (index > 4 ? 11 : 17)),                         \
1650         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1651                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1652                 TEMP_PWM_ENABLE, index - 1),                            \
1653         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1654                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1655                 TEMP_PWM_FAN_MAP, index - 1),                           \
1656         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1657                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1658         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1659                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1660         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1661                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1662         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1663                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1664         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1665                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1666         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1667                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1668         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1669                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1670         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1671                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1672         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1673                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1674         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1675                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1676         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1677                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1678         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1679                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1680         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1681                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1682         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1683                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1684         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1685                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1686         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1687                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1688         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1689                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1690         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1691                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1692
1693
1694 static struct sensor_device_attribute_2 w83795_in[][5] = {
1695         SENSOR_ATTR_IN(0),
1696         SENSOR_ATTR_IN(1),
1697         SENSOR_ATTR_IN(2),
1698         SENSOR_ATTR_IN(3),
1699         SENSOR_ATTR_IN(4),
1700         SENSOR_ATTR_IN(5),
1701         SENSOR_ATTR_IN(6),
1702         SENSOR_ATTR_IN(7),
1703         SENSOR_ATTR_IN(8),
1704         SENSOR_ATTR_IN(9),
1705         SENSOR_ATTR_IN(10),
1706         SENSOR_ATTR_IN(11),
1707         SENSOR_ATTR_IN(12),
1708         SENSOR_ATTR_IN(13),
1709         SENSOR_ATTR_IN(14),
1710         SENSOR_ATTR_IN(15),
1711         SENSOR_ATTR_IN(16),
1712         SENSOR_ATTR_IN(17),
1713         SENSOR_ATTR_IN(18),
1714         SENSOR_ATTR_IN(19),
1715         SENSOR_ATTR_IN(20),
1716 };
1717
1718 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1719         SENSOR_ATTR_FAN(1),
1720         SENSOR_ATTR_FAN(2),
1721         SENSOR_ATTR_FAN(3),
1722         SENSOR_ATTR_FAN(4),
1723         SENSOR_ATTR_FAN(5),
1724         SENSOR_ATTR_FAN(6),
1725         SENSOR_ATTR_FAN(7),
1726         SENSOR_ATTR_FAN(8),
1727         SENSOR_ATTR_FAN(9),
1728         SENSOR_ATTR_FAN(10),
1729         SENSOR_ATTR_FAN(11),
1730         SENSOR_ATTR_FAN(12),
1731         SENSOR_ATTR_FAN(13),
1732         SENSOR_ATTR_FAN(14),
1733 };
1734
1735 static const struct sensor_device_attribute_2 w83795_temp[][28] = {
1736         SENSOR_ATTR_TEMP(1),
1737         SENSOR_ATTR_TEMP(2),
1738         SENSOR_ATTR_TEMP(3),
1739         SENSOR_ATTR_TEMP(4),
1740         SENSOR_ATTR_TEMP(5),
1741         SENSOR_ATTR_TEMP(6),
1742 };
1743
1744 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1745         SENSOR_ATTR_DTS(7),
1746         SENSOR_ATTR_DTS(8),
1747         SENSOR_ATTR_DTS(9),
1748         SENSOR_ATTR_DTS(10),
1749         SENSOR_ATTR_DTS(11),
1750         SENSOR_ATTR_DTS(12),
1751         SENSOR_ATTR_DTS(13),
1752         SENSOR_ATTR_DTS(14),
1753 };
1754
1755 static const struct sensor_device_attribute_2 w83795_pwm[][8] = {
1756         SENSOR_ATTR_PWM(1),
1757         SENSOR_ATTR_PWM(2),
1758         SENSOR_ATTR_PWM(3),
1759         SENSOR_ATTR_PWM(4),
1760         SENSOR_ATTR_PWM(5),
1761         SENSOR_ATTR_PWM(6),
1762         SENSOR_ATTR_PWM(7),
1763         SENSOR_ATTR_PWM(8),
1764 };
1765
1766 static const struct sensor_device_attribute_2 w83795_tss[6] = {
1767         SENSOR_ATTR_2(temp1_source_sel, S_IWUSR | S_IRUGO,
1768                       show_temp_src, store_temp_src, NOT_USED, 0),
1769         SENSOR_ATTR_2(temp2_source_sel, S_IWUSR | S_IRUGO,
1770                       show_temp_src, store_temp_src, NOT_USED, 1),
1771         SENSOR_ATTR_2(temp3_source_sel, S_IWUSR | S_IRUGO,
1772                       show_temp_src, store_temp_src, NOT_USED, 2),
1773         SENSOR_ATTR_2(temp4_source_sel, S_IWUSR | S_IRUGO,
1774                       show_temp_src, store_temp_src, NOT_USED, 3),
1775         SENSOR_ATTR_2(temp5_source_sel, S_IWUSR | S_IRUGO,
1776                       show_temp_src, store_temp_src, NOT_USED, 4),
1777         SENSOR_ATTR_2(temp6_source_sel, S_IWUSR | S_IRUGO,
1778                       show_temp_src, store_temp_src, NOT_USED, 5),
1779 };
1780
1781 static const struct sensor_device_attribute_2 sda_single_files[] = {
1782         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1783                       store_chassis_clear, ALARM_STATUS, 46),
1784         SENSOR_ATTR_2(intrusion0_beep, S_IWUSR | S_IRUGO, show_alarm_beep,
1785                       store_beep, BEEP_ENABLE, 46),
1786         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1787                       store_beep, BEEP_ENABLE, 47),
1788 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1789         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1790                 store_fanin, FANIN_TOL, NOT_USED),
1791         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1792                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1793         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1794                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1795         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1796                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1797 #endif
1798 };
1799
1800 /*
1801  * Driver interface
1802  */
1803
1804 static void w83795_init_client(struct i2c_client *client)
1805 {
1806         struct w83795_data *data = i2c_get_clientdata(client);
1807         static const u16 clkin[4] = {   /* in kHz */
1808                 14318, 24000, 33333, 48000
1809         };
1810         u8 config;
1811
1812         if (reset)
1813                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1814
1815         /* Start monitoring if needed */
1816         config = w83795_read(client, W83795_REG_CONFIG);
1817         if (!(config & W83795_REG_CONFIG_START)) {
1818                 dev_info(&client->dev, "Enabling monitoring operations\n");
1819                 w83795_write(client, W83795_REG_CONFIG,
1820                              config | W83795_REG_CONFIG_START);
1821         }
1822
1823         data->clkin = clkin[(config >> 3) & 0x3];
1824         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1825 }
1826
1827 static int w83795_get_device_id(struct i2c_client *client)
1828 {
1829         int device_id;
1830
1831         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1832
1833         /* Special case for rev. A chips; can't be checked first because later
1834            revisions emulate this for compatibility */
1835         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1836                 int alt_id;
1837
1838                 alt_id = i2c_smbus_read_byte_data(client,
1839                                                   W83795_REG_DEVICEID_A);
1840                 if (alt_id == 0x50)
1841                         device_id = alt_id;
1842         }
1843
1844         return device_id;
1845 }
1846
1847 /* Return 0 if detection is successful, -ENODEV otherwise */
1848 static int w83795_detect(struct i2c_client *client,
1849                          struct i2c_board_info *info)
1850 {
1851         int bank, vendor_id, device_id, expected, i2c_addr, config;
1852         struct i2c_adapter *adapter = client->adapter;
1853         unsigned short address = client->addr;
1854         const char *chip_name;
1855
1856         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1857                 return -ENODEV;
1858         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1859         if (bank < 0 || (bank & 0x7c)) {
1860                 dev_dbg(&adapter->dev,
1861                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1862                         address, "bank");
1863                 return -ENODEV;
1864         }
1865
1866         /* Check Nuvoton vendor ID */
1867         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1868         expected = bank & 0x80 ? 0x5c : 0xa3;
1869         if (vendor_id != expected) {
1870                 dev_dbg(&adapter->dev,
1871                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1872                         address, "vendor id");
1873                 return -ENODEV;
1874         }
1875
1876         /* Check device ID */
1877         device_id = w83795_get_device_id(client) |
1878                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1879         if ((device_id >> 4) != 0x795) {
1880                 dev_dbg(&adapter->dev,
1881                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1882                         address, "device id\n");
1883                 return -ENODEV;
1884         }
1885
1886         /* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1887            should match */
1888         if ((bank & 0x07) == 0) {
1889                 i2c_addr = i2c_smbus_read_byte_data(client,
1890                                                     W83795_REG_I2C_ADDR);
1891                 if ((i2c_addr & 0x7f) != address) {
1892                         dev_dbg(&adapter->dev,
1893                                 "w83795: Detection failed at addr 0x%02hx, "
1894                                 "check %s\n", address, "i2c addr");
1895                         return -ENODEV;
1896                 }
1897         }
1898
1899         /* Check 795 chip type: 795G or 795ADG
1900            Usually we don't write to chips during detection, but here we don't
1901            quite have the choice; hopefully it's OK, we are about to return
1902            success anyway */
1903         if ((bank & 0x07) != 0)
1904                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1905                                           bank & ~0x07);
1906         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1907         if (config & W83795_REG_CONFIG_CONFIG48)
1908                 chip_name = "w83795adg";
1909         else
1910                 chip_name = "w83795g";
1911
1912         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1913         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1914                  'A' + (device_id & 0xf), address);
1915
1916         return 0;
1917 }
1918
1919 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1920                                const struct device_attribute *))
1921 {
1922         struct w83795_data *data = dev_get_drvdata(dev);
1923         int err, i, j;
1924
1925         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
1926                 if (!(data->has_in & (1 << i)))
1927                         continue;
1928                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
1929                         err = fn(dev, &w83795_in[i][j].dev_attr);
1930                         if (err)
1931                                 return err;
1932                 }
1933         }
1934
1935         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
1936                 if (!(data->has_fan & (1 << i)))
1937                         continue;
1938                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
1939                         err = fn(dev, &w83795_fan[i][j].dev_attr);
1940                         if (err)
1941                                 return err;
1942                 }
1943         }
1944
1945         for (i = 0; i < ARRAY_SIZE(w83795_tss); i++) {
1946                 j = w83795_tss_useful(data, i);
1947                 if (!j)
1948                         continue;
1949                 err = fn(dev, &w83795_tss[i].dev_attr);
1950                 if (err)
1951                         return err;
1952         }
1953
1954         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1955                 err = fn(dev, &sda_single_files[i].dev_attr);
1956                 if (err)
1957                         return err;
1958         }
1959
1960 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1961         for (i = 0; i < data->has_pwm; i++) {
1962                 for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) {
1963                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
1964                         if (err)
1965                                 return err;
1966                 }
1967         }
1968 #endif
1969
1970         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
1971                 if (!(data->has_temp & (1 << i)))
1972                         continue;
1973 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1974                 for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) {
1975 #else
1976                 for (j = 0; j < 8; j++) {
1977 #endif
1978                         err = fn(dev, &w83795_temp[i][j].dev_attr);
1979                         if (err)
1980                                 return err;
1981                 }
1982         }
1983
1984         if (data->enable_dts) {
1985                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
1986                         if (!(data->has_dts & (1 << i)))
1987                                 continue;
1988                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
1989                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
1990                                 if (err)
1991                                         return err;
1992                         }
1993                 }
1994         }
1995
1996         return 0;
1997 }
1998
1999 /* We need a wrapper that fits in w83795_handle_files */
2000 static int device_remove_file_wrapper(struct device *dev,
2001                                       const struct device_attribute *attr)
2002 {
2003         device_remove_file(dev, attr);
2004         return 0;
2005 }
2006
2007 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
2008 {
2009         struct w83795_data *data = i2c_get_clientdata(client);
2010         u8 vid_ctl;
2011         int i, err_max, err_min;
2012
2013         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
2014
2015         /* Return immediately if VRM isn't configured */
2016         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
2017                 return;
2018
2019         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
2020         for (i = 0; i < 2; i++) {
2021                 if (!(data->has_dyn_in & (1 << i)))
2022                         continue;
2023
2024                 /* Voltage limits in dynamic mode, switch to read-only */
2025                 err_max = sysfs_chmod_file(&client->dev.kobj,
2026                                            &w83795_in[i][2].dev_attr.attr,
2027                                            S_IRUGO);
2028                 err_min = sysfs_chmod_file(&client->dev.kobj,
2029                                            &w83795_in[i][3].dev_attr.attr,
2030                                            S_IRUGO);
2031                 if (err_max || err_min)
2032                         dev_warn(&client->dev, "Failed to set in%d limits "
2033                                  "read-only (%d, %d)\n", i, err_max, err_min);
2034                 else
2035                         dev_info(&client->dev, "in%d limits set dynamically "
2036                                  "from VID\n", i);
2037         }
2038 }
2039
2040 /* Check pins that can be used for either temperature or voltage monitoring */
2041 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
2042                                      int temp_chan, int in_chan)
2043 {
2044         /* config is a 2-bit value */
2045         switch (config) {
2046         case 0x2: /* Voltage monitoring */
2047                 data->has_in |= 1 << in_chan;
2048                 break;
2049         case 0x1: /* Thermal diode */
2050                 if (temp_chan >= 4)
2051                         break;
2052                 data->temp_mode |= 1 << temp_chan;
2053                 /* fall through */
2054         case 0x3: /* Thermistor */
2055                 data->has_temp |= 1 << temp_chan;
2056                 break;
2057         }
2058 }
2059
2060 static int w83795_probe(struct i2c_client *client,
2061                         const struct i2c_device_id *id)
2062 {
2063         int i;
2064         u8 tmp;
2065         struct device *dev = &client->dev;
2066         struct w83795_data *data;
2067         int err;
2068
2069         data = kzalloc(sizeof(struct w83795_data), GFP_KERNEL);
2070         if (!data) {
2071                 err = -ENOMEM;
2072                 goto exit;
2073         }
2074
2075         i2c_set_clientdata(client, data);
2076         data->chip_type = id->driver_data;
2077         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
2078         mutex_init(&data->update_lock);
2079
2080         /* Initialize the chip */
2081         w83795_init_client(client);
2082
2083         /* Check which voltages and fans are present */
2084         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
2085                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
2086         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
2087                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
2088
2089         /* Check which analog temperatures and extra voltages are present */
2090         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
2091         if (tmp & 0x20)
2092                 data->enable_dts = 1;
2093         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
2094         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
2095         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
2096         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
2097         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
2098         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
2099         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
2100
2101         /* Check DTS enable status */
2102         if (data->enable_dts) {
2103                 if (1 & w83795_read(client, W83795_REG_DTSC))
2104                         data->enable_dts |= 2;
2105                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
2106         }
2107
2108         /* Report PECI Tbase values */
2109         if (data->enable_dts == 1) {
2110                 for (i = 0; i < 8; i++) {
2111                         if (!(data->has_dts & (1 << i)))
2112                                 continue;
2113                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
2114                         dev_info(&client->dev,
2115                                  "PECI agent %d Tbase temperature: %u\n",
2116                                  i + 1, (unsigned int)tmp & 0x7f);
2117                 }
2118         }
2119
2120         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2121
2122         /* pwm and smart fan */
2123         if (data->chip_type == w83795g)
2124                 data->has_pwm = 8;
2125         else
2126                 data->has_pwm = 2;
2127
2128         err = w83795_handle_files(dev, device_create_file);
2129         if (err)
2130                 goto exit_remove;
2131
2132         if (data->chip_type == w83795g)
2133                 w83795_check_dynamic_in_limits(client);
2134
2135         data->hwmon_dev = hwmon_device_register(dev);
2136         if (IS_ERR(data->hwmon_dev)) {
2137                 err = PTR_ERR(data->hwmon_dev);
2138                 goto exit_remove;
2139         }
2140
2141         return 0;
2142
2143 exit_remove:
2144         w83795_handle_files(dev, device_remove_file_wrapper);
2145         kfree(data);
2146 exit:
2147         return err;
2148 }
2149
2150 static int w83795_remove(struct i2c_client *client)
2151 {
2152         struct w83795_data *data = i2c_get_clientdata(client);
2153
2154         hwmon_device_unregister(data->hwmon_dev);
2155         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2156         kfree(data);
2157
2158         return 0;
2159 }
2160
2161
2162 static const struct i2c_device_id w83795_id[] = {
2163         { "w83795g", w83795g },
2164         { "w83795adg", w83795adg },
2165         { }
2166 };
2167 MODULE_DEVICE_TABLE(i2c, w83795_id);
2168
2169 static struct i2c_driver w83795_driver = {
2170         .driver = {
2171                    .name = "w83795",
2172         },
2173         .probe          = w83795_probe,
2174         .remove         = w83795_remove,
2175         .id_table       = w83795_id,
2176
2177         .class          = I2C_CLASS_HWMON,
2178         .detect         = w83795_detect,
2179         .address_list   = normal_i2c,
2180 };
2181
2182 static int __init sensors_w83795_init(void)
2183 {
2184         return i2c_add_driver(&w83795_driver);
2185 }
2186
2187 static void __exit sensors_w83795_exit(void)
2188 {
2189         i2c_del_driver(&w83795_driver);
2190 }
2191
2192 MODULE_AUTHOR("Wei Song, Jean Delvare <khali@linux-fr.org>");
2193 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2194 MODULE_LICENSE("GPL");
2195
2196 module_init(sensors_w83795_init);
2197 module_exit(sensors_w83795_exit);