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