drivers/hwmon/w83795.c

   1 /*
   2  *  w83795.c - Linux kernel driver for hardware monitoring
   3  *  Copyright (C) 2008 Nuvoton Technology Corp.
   4  *                Wei Song
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation - version 2.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  *  02110-1301 USA.
  19  *
  20  *  Supports following chips:
  21  *
  22  *  Chip       #vin   #fanin #pwm #temp #dts wchipid  vendid  i2c  ISA
  23  *  w83795g     21     14     8     6     8    0x79   0x5ca3  yes   no
  24  *  w83795adg   18     14     2     6     8    0x79   0x5ca3  yes   no
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/i2c.h>
  32 #include <linux/hwmon.h>
  33 #include <linux/hwmon-sysfs.h>
  34 #include <linux/err.h>
  35 #include <linux/mutex.h>
  36 #include <linux/delay.h>
  37
  38 /* Addresses to scan */
  39 static const unsigned short normal_i2c[] = {
  40         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
  41 };
  42
  43
  44 static int reset;
  45 module_param(reset, bool, 0);
  46 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  47
  48
  49 #define W83795_REG_BANKSEL              0x00
  50 #define W83795_REG_VENDORID             0xfd
  51 #define W83795_REG_CHIPID               0xfe
  52 #define W83795_REG_DEVICEID             0xfb
  53 #define W83795_REG_DEVICEID_A           0xff
  54
  55 #define W83795_REG_I2C_ADDR             0xfc
  56 #define W83795_REG_CONFIG               0x01
  57 #define W83795_REG_CONFIG_CONFIG48      0x04
  58 #define W83795_REG_CONFIG_START 0x01
  59
  60 /* Multi-Function Pin Ctrl Registers */
  61 #define W83795_REG_VOLT_CTRL1           0x02
  62 #define W83795_REG_VOLT_CTRL2           0x03
  63 #define W83795_REG_TEMP_CTRL1           0x04
  64 #define W83795_REG_TEMP_CTRL2           0x05
  65 #define W83795_REG_FANIN_CTRL1          0x06
  66 #define W83795_REG_FANIN_CTRL2          0x07
  67 #define W83795_REG_VMIGB_CTRL           0x08
  68
  69 #define TEMP_CTRL_DISABLE               0
  70 #define TEMP_CTRL_TD                    1
  71 #define TEMP_CTRL_VSEN                  2
  72 #define TEMP_CTRL_TR                    3
  73 #define TEMP_CTRL_SHIFT                 4
  74 #define TEMP_CTRL_HASIN_SHIFT           5
  75 /* temp mode may effect VSEN17-12 (in20-15) */
  76 static const u16 W83795_REG_TEMP_CTRL[][6] = {
  77         /* Disable, TD, VSEN, TR, register shift value, has_in shift num */
  78         {0x00, 0x01, 0x02, 0x03, 0, 17},        /* TR1 */
  79         {0x00, 0x04, 0x08, 0x0C, 2, 18},        /* TR2 */
  80         {0x00, 0x10, 0x20, 0x30, 4, 19},        /* TR3 */
  81         {0x00, 0x40, 0x80, 0xC0, 6, 20},        /* TR4 */
  82         {0x00, 0x00, 0x02, 0x03, 0, 15},        /* TR5 */
  83         {0x00, 0x00, 0x08, 0x0C, 2, 16},        /* TR6 */
  84 };
  85
  86 #define TEMP_READ                       0
  87 #define TEMP_CRIT                       1
  88 #define TEMP_CRIT_HYST                  2
  89 #define TEMP_WARN                       3
  90 #define TEMP_WARN_HYST                  4
  91 /* only crit and crit_hyst affect real-time alarm status
  92  * current crit crit_hyst warn warn_hyst */
  93 static const u16 W83795_REG_TEMP[][5] = {
  94         {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
  95         {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
  96         {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
  97         {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
  98         {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
  99         {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
 100 };
 101
 102 #define IN_READ                         0
 103 #define IN_MAX                          1
 104 #define IN_LOW                          2
 105 static const u16 W83795_REG_IN[][3] = {
 106         /* Current, HL, LL */
 107         {0x10, 0x70, 0x71},     /* VSEN1 */
 108         {0x11, 0x72, 0x73},     /* VSEN2 */
 109         {0x12, 0x74, 0x75},     /* VSEN3 */
 110         {0x13, 0x76, 0x77},     /* VSEN4 */
 111         {0x14, 0x78, 0x79},     /* VSEN5 */
 112         {0x15, 0x7a, 0x7b},     /* VSEN6 */
 113         {0x16, 0x7c, 0x7d},     /* VSEN7 */
 114         {0x17, 0x7e, 0x7f},     /* VSEN8 */
 115         {0x18, 0x80, 0x81},     /* VSEN9 */
 116         {0x19, 0x82, 0x83},     /* VSEN10 */
 117         {0x1A, 0x84, 0x85},     /* VSEN11 */
 118         {0x1B, 0x86, 0x87},     /* VTT */
 119         {0x1C, 0x88, 0x89},     /* 3VDD */
 120         {0x1D, 0x8a, 0x8b},     /* 3VSB */
 121         {0x1E, 0x8c, 0x8d},     /* VBAT */
 122         {0x1F, 0xa6, 0xa7},     /* VSEN12 */
 123         {0x20, 0xaa, 0xab},     /* VSEN13 */
 124         {0x21, 0x96, 0x97},     /* VSEN14 */
 125         {0x22, 0x9a, 0x9b},     /* VSEN15 */
 126         {0x23, 0x9e, 0x9f},     /* VSEN16 */
 127         {0x24, 0xa2, 0xa3},     /* VSEN17 */
 128 };
 129 #define W83795_REG_VRLSB                0x3C
 130 #define VRLSB_SHIFT                     6
 131
 132 static const u8 W83795_REG_IN_HL_LSB[] = {
 133         0x8e,   /* VSEN1-4 */
 134         0x90,   /* VSEN5-8 */
 135         0x92,   /* VSEN9-11 */
 136         0x94,   /* VTT, 3VDD, 3VSB, 3VBAT */
 137         0xa8,   /* VSEN12 */
 138         0xac,   /* VSEN13 */
 139         0x98,   /* VSEN14 */
 140         0x9c,   /* VSEN15 */
 141         0xa0,   /* VSEN16 */
 142         0xa4,   /* VSEN17 */
 143 };
 144
 145 #define IN_LSB_REG(index, type) \
 146         (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
 147         : (W83795_REG_IN_HL_LSB[(index)] + 1))
 148
 149 #define IN_LSB_REG_NUM                  10
 150
 151 #define IN_LSB_SHIFT                    0
 152 #define IN_LSB_IDX                      1
 153 static const u8 IN_LSB_SHIFT_IDX[][2] = {
 154         /* High/Low LSB shift, LSB No. */
 155         {0x00, 0x00},   /* VSEN1 */
 156         {0x02, 0x00},   /* VSEN2 */
 157         {0x04, 0x00},   /* VSEN3 */
 158         {0x06, 0x00},   /* VSEN4 */
 159         {0x00, 0x01},   /* VSEN5 */
 160         {0x02, 0x01},   /* VSEN6 */
 161         {0x04, 0x01},   /* VSEN7 */
 162         {0x06, 0x01},   /* VSEN8 */
 163         {0x00, 0x02},   /* VSEN9 */
 164         {0x02, 0x02},   /* VSEN10 */
 165         {0x04, 0x02},   /* VSEN11 */
 166         {0x00, 0x03},   /* VTT */
 167         {0x02, 0x03},   /* 3VDD */
 168         {0x04, 0x03},   /* 3VSB */
 169         {0x06, 0x03},   /* VBAT */
 170         {0x06, 0x04},   /* VSEN12 */
 171         {0x06, 0x05},   /* VSEN13 */
 172         {0x06, 0x06},   /* VSEN14 */
 173         {0x06, 0x07},   /* VSEN15 */
 174         {0x06, 0x08},   /* VSEN16 */
 175         {0x06, 0x09},   /* VSEN17 */
 176 };
 177
 178
 179 /* 3VDD, 3VSB, VBAT * 0.006 */
 180 #define REST_VLT_BEGIN                  12  /* the 13th volt to 15th */
 181 #define REST_VLT_END                    14  /* the 13th volt to 15th */
 182
 183 #define W83795_REG_FAN(index)           (0x2E + (index))
 184 #define W83795_REG_FAN_MIN_HL(index)    (0xB6 + (index))
 185 #define W83795_REG_FAN_MIN_LSB(index)   (0xC4 + (index) / 2)
 186 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
 187         (((index) % 1) ? 4 : 0)
 188
 189 #define W83795_REG_VID_CTRL             0x6A
 190
 191 #define ALARM_BEEP_REG_NUM              6
 192 #define W83795_REG_ALARM(index)         (0x41 + (index))
 193 #define W83795_REG_BEEP(index)          (0x50 + (index))
 194
 195 #define W83795_REG_CLR_CHASSIS          0x4D
 196
 197
 198 #define W83795_REG_TEMP_NUM             6
 199 #define W83795_REG_FCMS1                0x201
 200 #define W83795_REG_FCMS2                0x208
 201 #define W83795_REG_TFMR(index)          (0x202 + (index))
 202 #define W83795_REG_FOMC                 0x20F
 203
 204 #define W83795_REG_TSS(index)           (0x209 + (index))
 205
 206 #define PWM_OUTPUT                      0
 207 #define PWM_START                       1
 208 #define PWM_NONSTOP                     2
 209 #define PWM_STOP_TIME                   3
 210 #define PWM_FREQ                        4
 211 #define W83795_REG_PWM(index, nr) \
 212         (((nr) == 0 ? 0x210 : \
 213           (nr) == 1 ? 0x220 : \
 214           (nr) == 2 ? 0x228 : \
 215           (nr) == 3 ? 0x230 : 0x218) + (index))
 216
 217 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 218 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 219 #define W83795_REG_TFTS                 0x250
 220
 221 #define TEMP_PWM_TTTI                   0
 222 #define TEMP_PWM_CTFS                   1
 223 #define TEMP_PWM_HCT                    2
 224 #define TEMP_PWM_HOT                    3
 225 #define W83795_REG_TTTI(index)          (0x260 + (index))
 226 #define W83795_REG_CTFS(index)          (0x268 + (index))
 227 #define W83795_REG_HT(index)            (0x270 + (index))
 228
 229 #define SF4_TEMP                        0
 230 #define SF4_PWM                         1
 231 #define W83795_REG_SF4_TEMP(temp_num, index) \
 232         (0x280 + 0x10 * (temp_num) + (index))
 233 #define W83795_REG_SF4_PWM(temp_num, index) \
 234         (0x288 + 0x10 * (temp_num) + (index))
 235
 236 #define W83795_REG_DTSC                 0x301
 237 #define W83795_REG_DTSE                 0x302
 238 #define W83795_REG_DTS(index)           (0x26 + (index))
 239
 240 #define DTS_CRIT                        0
 241 #define DTS_CRIT_HYST                   1
 242 #define DTS_WARN                        2
 243 #define DTS_WARN_HYST                   3
 244 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 245
 246 #define SETUP_PWM_DEFAULT               0
 247 #define SETUP_PWM_UPTIME                1
 248 #define SETUP_PWM_DOWNTIME              2
 249 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 250
 251 static inline u16 in_from_reg(u8 index, u16 val)
 252 {
 253         if ((index >= REST_VLT_BEGIN) && (index <= REST_VLT_END))
 254                 return val * 6;
 255         else
 256                 return val * 2;
 257 }
 258
 259 static inline u16 in_to_reg(u8 index, u16 val)
 260 {
 261         if ((index >= REST_VLT_BEGIN) && (index <= REST_VLT_END))
 262                 return val / 6;
 263         else
 264                 return val / 2;
 265 }
 266
 267 static inline unsigned long fan_from_reg(u16 val)
 268 {
 269         if ((val == 0xfff) || (val == 0))
 270                 return 0;
 271         return 1350000UL / val;
 272 }
 273
 274 static inline u16 fan_to_reg(long rpm)
 275 {
 276         if (rpm <= 0)
 277                 return 0x0fff;
 278         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 279 }
 280
 281 static inline unsigned long time_from_reg(u8 reg)
 282 {
 283         return reg * 100;
 284 }
 285
 286 static inline u8 time_to_reg(unsigned long val)
 287 {
 288         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 289 }
 290
 291 static inline long temp_from_reg(s8 reg)
 292 {
 293         return reg * 1000;
 294 }
 295
 296 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 297 {
 298         return SENSORS_LIMIT(val / 1000, min, max);
 299 }
 300
 301 static const u16 pwm_freq_cksel0[16] = {
 302         1024, 512, 341, 256, 205, 171, 146, 128,
 303         85, 64, 32, 16, 8, 4, 2, 1
 304 };
 305
 306 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 307 {
 308         unsigned long base_clock;
 309
 310         if (reg & 0x80) {
 311                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 312                 return base_clock / ((reg & 0x7f) + 1);
 313         } else
 314                 return pwm_freq_cksel0[reg & 0x0f];
 315 }
 316
 317 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 318 {
 319         unsigned long base_clock;
 320         u8 reg0, reg1;
 321         unsigned long best0, best1;
 322
 323         /* Best fit for cksel = 0 */
 324         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 325                 if (val > (pwm_freq_cksel0[reg0] +
 326                            pwm_freq_cksel0[reg0 + 1]) / 2)
 327                         break;
 328         }
 329         if (val < 375)  /* cksel = 1 can't beat this */
 330                 return reg0;
 331         best0 = pwm_freq_cksel0[reg0];
 332
 333         /* Best fit for cksel = 1 */
 334         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 335         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 336         best1 = base_clock / reg1;
 337         reg1 = 0x80 | (reg1 - 1);
 338
 339         /* Choose the closest one */
 340         if (abs(val - best0) > abs(val - best1))
 341                 return reg1;
 342         else
 343                 return reg0;
 344 }
 345
 346 enum chip_types {w83795g, w83795adg};
 347
 348 struct w83795_data {
 349         struct device *hwmon_dev;
 350         struct mutex update_lock;
 351         unsigned long last_updated;     /* In jiffies */
 352         enum chip_types chip_type;
 353
 354         u8 bank;
 355
 356         u32 has_in;             /* Enable monitor VIN or not */
 357         u8 has_dyn_in;          /* Only in2-0 can have this */
 358         u16 in[21][3];          /* Register value, read/high/low */
 359         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 360         u8 has_gain;            /* has gain: in17-20 * 8 */
 361
 362         u16 has_fan;            /* Enable fan14-1 or not */
 363         u16 fan[14];            /* Register value combine */
 364         u16 fan_min[14];        /* Register value combine */
 365
 366         u8 has_temp;            /* Enable monitor temp6-1 or not */
 367         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 368         u8 temp_read_vrlsb[6];
 369         u8 temp_mode;           /* bit 0: TR mode, bit 1: TD mode */
 370         u8 temp_src[3];         /* Register value */
 371
 372         u8 enable_dts;          /* Enable PECI and SB-TSI,
 373                                  * bit 0: =1 enable, =0 disable,
 374                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI */
 375         u8 has_dts;             /* Enable monitor DTS temp */
 376         s8 dts[8];              /* Register value */
 377         u8 dts_read_vrlsb[8];   /* Register value */
 378         s8 dts_ext[4];          /* Register value */
 379
 380         u8 has_pwm;             /* 795g supports 8 pwm, 795adg only supports 2,
 381                                  * no config register, only affected by chip
 382                                  * type */
 383         u8 pwm[8][5];           /* Register value, output, start, non stop, stop
 384                                  * time, freq */
 385         u16 clkin;              /* CLKIN frequency in kHz */
 386         u8 pwm_fcms[2];         /* Register value */
 387         u8 pwm_tfmr[6];         /* Register value */
 388         u8 pwm_fomc;            /* Register value */
 389
 390         u16 target_speed[8];    /* Register value, target speed for speed
 391                                  * cruise */
 392         u8 tol_speed;           /* tolerance of target speed */
 393         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 394         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 395
 396         u8 setup_pwm[3];        /* Register value */
 397
 398         u8 alarms[6];           /* Register value */
 399         u8 beeps[6];            /* Register value */
 400         u8 beep_enable;
 401
 402         char valid;
 403 };
 404
 405 /*
 406  * Hardware access
 407  * We assume that nobdody can change the bank outside the driver.
 408  */
 409
 410 /* Must be called with data->update_lock held, except during initialization */
 411 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 412 {
 413         struct w83795_data *data = i2c_get_clientdata(client);
 414         int err;
 415
 416         /* If the same bank is already set, nothing to do */
 417         if ((data->bank & 0x07) == bank)
 418                 return 0;
 419
 420         /* Change to new bank, preserve all other bits */
 421         bank |= data->bank & ~0x07;
 422         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 423         if (err < 0) {
 424                 dev_err(&client->dev,
 425                         "Failed to set bank to %d, err %d\n",
 426                         (int)bank, err);
 427                 return err;
 428         }
 429         data->bank = bank;
 430
 431         return 0;
 432 }
 433
 434 /* Must be called with data->update_lock held, except during initialization */
 435 static u8 w83795_read(struct i2c_client *client, u16 reg)
 436 {
 437         int err;
 438
 439         err = w83795_set_bank(client, reg >> 8);
 440         if (err < 0)
 441                 return 0x00;    /* Arbitrary */
 442
 443         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 444         if (err < 0) {
 445                 dev_err(&client->dev,
 446                         "Failed to read from register 0x%03x, err %d\n",
 447                         (int)reg, err);
 448                 return 0x00;    /* Arbitrary */
 449         }
 450         return err;
 451 }
 452
 453 /* Must be called with data->update_lock held, except during initialization */
 454 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 455 {
 456         int err;
 457
 458         err = w83795_set_bank(client, reg >> 8);
 459         if (err < 0)
 460                 return err;
 461
 462         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 463         if (err < 0)
 464                 dev_err(&client->dev,
 465                         "Failed to write to register 0x%03x, err %d\n",
 466                         (int)reg, err);
 467         return err;
 468 }
 469
 470 static struct w83795_data *w83795_update_device(struct device *dev)
 471 {
 472         struct i2c_client *client = to_i2c_client(dev);
 473         struct w83795_data *data = i2c_get_clientdata(client);
 474         u16 tmp;
 475         int i;
 476
 477         mutex_lock(&data->update_lock);
 478
 479         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 480               || !data->valid))
 481                 goto END;
 482
 483         /* Update the voltages value */
 484         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 485                 if (!(data->has_in & (1 << i)))
 486                         continue;
 487                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 488                 tmp |= (w83795_read(client, W83795_REG_VRLSB)
 489                         >> VRLSB_SHIFT) & 0x03;
 490                 data->in[i][IN_READ] = tmp;
 491         }
 492
 493         /* in0-2 can have dynamic limits (W83795G only) */
 494         if (data->has_dyn_in) {
 495                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 496                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 497
 498                 for (i = 0; i < 3; i++) {
 499                         if (!(data->has_dyn_in & (1 << i)))
 500                                 continue;
 501                         data->in[i][IN_MAX] =
 502                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 503                         data->in[i][IN_LOW] =
 504                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 505                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 506                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 507                 }
 508         }
 509
 510         /* Update fan */
 511         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 512                 if (!(data->has_fan & (1 << i)))
 513                         continue;
 514                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 515                 data->fan[i] |=
 516                   (w83795_read(client, W83795_REG_VRLSB) >> 4) & 0x0F;
 517         }
 518
 519         /* Update temperature */
 520         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 521                 /* even stop monitor, register still keep value, just read out
 522                  * it */
 523                 if (!(data->has_temp & (1 << i))) {
 524                         data->temp[i][TEMP_READ] = 0;
 525                         data->temp_read_vrlsb[i] = 0;
 526                         continue;
 527                 }
 528                 data->temp[i][TEMP_READ] =
 529                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 530                 data->temp_read_vrlsb[i] =
 531                         w83795_read(client, W83795_REG_VRLSB);
 532         }
 533
 534         /* Update dts temperature */
 535         if (data->enable_dts != 0) {
 536                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 537                         if (!(data->has_dts & (1 << i)))
 538                                 continue;
 539                         data->dts[i] =
 540                                 w83795_read(client, W83795_REG_DTS(i));
 541                         data->dts_read_vrlsb[i] =
 542                                 w83795_read(client, W83795_REG_VRLSB);
 543                 }
 544         }
 545
 546         /* Update pwm output */
 547         for (i = 0; i < data->has_pwm; i++) {
 548                 data->pwm[i][PWM_OUTPUT] =
 549                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 550         }
 551
 552         /* update alarm */
 553         for (i = 0; i < ALARM_BEEP_REG_NUM; i++)
 554                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 555
 556         data->last_updated = jiffies;
 557         data->valid = 1;
 558
 559 END:
 560         mutex_unlock(&data->update_lock);
 561         return data;
 562 }
 563
 564 /*
 565  * Sysfs attributes
 566  */
 567
 568 #define ALARM_STATUS      0
 569 #define BEEP_ENABLE       1
 570 static ssize_t
 571 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 572 {
 573         struct w83795_data *data = w83795_update_device(dev);
 574         struct sensor_device_attribute_2 *sensor_attr =
 575             to_sensor_dev_attr_2(attr);
 576         int nr = sensor_attr->nr;
 577         int index = sensor_attr->index >> 3;
 578         int bit = sensor_attr->index & 0x07;
 579         u8 val;
 580
 581         if (ALARM_STATUS == nr) {
 582                 val = (data->alarms[index] >> (bit)) & 1;
 583         } else {                /* BEEP_ENABLE */
 584                 val = (data->beeps[index] >> (bit)) & 1;
 585         }
 586
 587         return sprintf(buf, "%u\n", val);
 588 }
 589
 590 static ssize_t
 591 store_beep(struct device *dev, struct device_attribute *attr,
 592            const char *buf, size_t count)
 593 {
 594         struct i2c_client *client = to_i2c_client(dev);
 595         struct w83795_data *data = i2c_get_clientdata(client);
 596         struct sensor_device_attribute_2 *sensor_attr =
 597             to_sensor_dev_attr_2(attr);
 598         int index = sensor_attr->index >> 3;
 599         int shift = sensor_attr->index & 0x07;
 600         u8 beep_bit = 1 << shift;
 601         unsigned long val;
 602
 603         if (strict_strtoul(buf, 10, &val) < 0)
 604                 return -EINVAL;
 605         if (val != 0 && val != 1)
 606                 return -EINVAL;
 607
 608         mutex_lock(&data->update_lock);
 609         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 610         data->beeps[index] &= ~beep_bit;
 611         data->beeps[index] |= val << shift;
 612         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 613         mutex_unlock(&data->update_lock);
 614
 615         return count;
 616 }
 617
 618 static ssize_t
 619 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
 620 {
 621         struct i2c_client *client = to_i2c_client(dev);
 622         struct w83795_data *data = i2c_get_clientdata(client);
 623         return sprintf(buf, "%u\n", data->beep_enable);
 624 }
 625
 626 static ssize_t
 627 store_beep_enable(struct device *dev, struct device_attribute *attr,
 628                   const char *buf, size_t count)
 629 {
 630         struct i2c_client *client = to_i2c_client(dev);
 631         struct w83795_data *data = i2c_get_clientdata(client);
 632         unsigned long val;
 633         u8 tmp;
 634
 635         if (strict_strtoul(buf, 10, &val) < 0)
 636                 return -EINVAL;
 637         if (val != 0 && val != 1)
 638                 return -EINVAL;
 639
 640         mutex_lock(&data->update_lock);
 641         data->beep_enable = val;
 642         tmp = w83795_read(client, W83795_REG_BEEP(5));
 643         tmp &= 0x7f;
 644         tmp |= val << 7;
 645         w83795_write(client, W83795_REG_BEEP(5), tmp);
 646         mutex_unlock(&data->update_lock);
 647
 648         return count;
 649 }
 650
 651 /* Write any value to clear chassis alarm */
 652 static ssize_t
 653 store_chassis_clear(struct device *dev,
 654                     struct device_attribute *attr, const char *buf,
 655                     size_t count)
 656 {
 657         struct i2c_client *client = to_i2c_client(dev);
 658         struct w83795_data *data = i2c_get_clientdata(client);
 659         u8 val;
 660
 661         mutex_lock(&data->update_lock);
 662         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 663         val |= 0x80;
 664         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 665         mutex_unlock(&data->update_lock);
 666         return count;
 667 }
 668
 669 #define FAN_INPUT     0
 670 #define FAN_MIN       1
 671 static ssize_t
 672 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 673 {
 674         struct sensor_device_attribute_2 *sensor_attr =
 675             to_sensor_dev_attr_2(attr);
 676         int nr = sensor_attr->nr;
 677         int index = sensor_attr->index;
 678         struct w83795_data *data = w83795_update_device(dev);
 679         u16 val;
 680
 681         if (FAN_INPUT == nr)
 682                 val = data->fan[index] & 0x0fff;
 683         else
 684                 val = data->fan_min[index] & 0x0fff;
 685
 686         return sprintf(buf, "%lu\n", fan_from_reg(val));
 687 }
 688
 689 static ssize_t
 690 store_fan_min(struct device *dev, struct device_attribute *attr,
 691               const char *buf, size_t count)
 692 {
 693         struct sensor_device_attribute_2 *sensor_attr =
 694             to_sensor_dev_attr_2(attr);
 695         int index = sensor_attr->index;
 696         struct i2c_client *client = to_i2c_client(dev);
 697         struct w83795_data *data = i2c_get_clientdata(client);
 698         unsigned long val;
 699
 700         if (strict_strtoul(buf, 10, &val))
 701                 return -EINVAL;
 702         val = fan_to_reg(val);
 703
 704         mutex_lock(&data->update_lock);
 705         data->fan_min[index] = val;
 706         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 707         val &= 0x0f;
 708         if (index % 1) {
 709                 val <<= 4;
 710                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 711                        & 0x0f;
 712         } else {
 713                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 714                        & 0xf0;
 715         }
 716         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 717         mutex_unlock(&data->update_lock);
 718
 719         return count;
 720 }
 721
 722 static ssize_t
 723 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 724 {
 725         struct w83795_data *data = w83795_update_device(dev);
 726         struct sensor_device_attribute_2 *sensor_attr =
 727             to_sensor_dev_attr_2(attr);
 728         int nr = sensor_attr->nr;
 729         int index = sensor_attr->index;
 730         unsigned int val;
 731
 732         switch (nr) {
 733         case PWM_STOP_TIME:
 734                 val = time_from_reg(data->pwm[index][nr]);
 735                 break;
 736         case PWM_FREQ:
 737                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 738                 break;
 739         default:
 740                 val = data->pwm[index][nr];
 741                 break;
 742         }
 743
 744         return sprintf(buf, "%u\n", val);
 745 }
 746
 747 static ssize_t
 748 store_pwm(struct device *dev, struct device_attribute *attr,
 749           const char *buf, size_t count)
 750 {
 751         struct i2c_client *client = to_i2c_client(dev);
 752         struct w83795_data *data = i2c_get_clientdata(client);
 753         struct sensor_device_attribute_2 *sensor_attr =
 754             to_sensor_dev_attr_2(attr);
 755         int nr = sensor_attr->nr;
 756         int index = sensor_attr->index;
 757         unsigned long val;
 758
 759         if (strict_strtoul(buf, 10, &val) < 0)
 760                 return -EINVAL;
 761
 762         mutex_lock(&data->update_lock);
 763         switch (nr) {
 764         case PWM_STOP_TIME:
 765                 val = time_to_reg(val);
 766                 break;
 767         case PWM_FREQ:
 768                 val = pwm_freq_to_reg(val, data->clkin);
 769                 break;
 770         default:
 771                 val = SENSORS_LIMIT(val, 0, 0xff);
 772                 break;
 773         }
 774         w83795_write(client, W83795_REG_PWM(index, nr), val);
 775         data->pwm[index][nr] = val;
 776         mutex_unlock(&data->update_lock);
 777         return count;
 778 }
 779
 780 static ssize_t
 781 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 782 {
 783         struct sensor_device_attribute_2 *sensor_attr =
 784             to_sensor_dev_attr_2(attr);
 785         struct i2c_client *client = to_i2c_client(dev);
 786         struct w83795_data *data = i2c_get_clientdata(client);
 787         int index = sensor_attr->index;
 788         u8 tmp;
 789
 790         if (1 == (data->pwm_fcms[0] & (1 << index))) {
 791                 tmp = 2;
 792                 goto out;
 793         }
 794         for (tmp = 0; tmp < 6; tmp++) {
 795                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 796                         tmp = 3;
 797                         goto out;
 798                 }
 799         }
 800         if (data->pwm_fomc & (1 << index))
 801                 tmp = 0;
 802         else
 803                 tmp = 1;
 804
 805 out:
 806         return sprintf(buf, "%u\n", tmp);
 807 }
 808
 809 static ssize_t
 810 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 811           const char *buf, size_t count)
 812 {
 813         struct i2c_client *client = to_i2c_client(dev);
 814         struct w83795_data *data = i2c_get_clientdata(client);
 815         struct sensor_device_attribute_2 *sensor_attr =
 816             to_sensor_dev_attr_2(attr);
 817         int index = sensor_attr->index;
 818         unsigned long val;
 819         int i;
 820
 821         if (strict_strtoul(buf, 10, &val) < 0)
 822                 return -EINVAL;
 823         if (val > 2)
 824                 return -EINVAL;
 825
 826         mutex_lock(&data->update_lock);
 827         switch (val) {
 828         case 0:
 829         case 1:
 830                 data->pwm_fcms[0] &= ~(1 << index);
 831                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 832                 for (i = 0; i < 6; i++) {
 833                         data->pwm_tfmr[i] &= ~(1 << index);
 834                         w83795_write(client, W83795_REG_TFMR(i),
 835                                 data->pwm_tfmr[i]);
 836                 }
 837                 data->pwm_fomc |= 1 << index;
 838                 data->pwm_fomc ^= val << index;
 839                 w83795_write(client, W83795_REG_FOMC, data->pwm_fomc);
 840                 break;
 841         case 2:
 842                 data->pwm_fcms[0] |= (1 << index);
 843                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 844                 break;
 845         }
 846         mutex_unlock(&data->update_lock);
 847         return count;
 848 }
 849
 850 static ssize_t
 851 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
 852 {
 853         struct sensor_device_attribute_2 *sensor_attr =
 854             to_sensor_dev_attr_2(attr);
 855         struct i2c_client *client = to_i2c_client(dev);
 856         struct w83795_data *data = i2c_get_clientdata(client);
 857         int index = sensor_attr->index;
 858         u8 val = index / 2;
 859         u8 tmp = data->temp_src[val];
 860
 861         if (index % 1)
 862                 val = 4;
 863         else
 864                 val = 0;
 865         tmp >>= val;
 866         tmp &= 0x0f;
 867
 868         return sprintf(buf, "%u\n", tmp);
 869 }
 870
 871 static ssize_t
 872 store_temp_src(struct device *dev, struct device_attribute *attr,
 873           const char *buf, size_t count)
 874 {
 875         struct i2c_client *client = to_i2c_client(dev);
 876         struct w83795_data *data = i2c_get_clientdata(client);
 877         struct sensor_device_attribute_2 *sensor_attr =
 878             to_sensor_dev_attr_2(attr);
 879         int index = sensor_attr->index;
 880         unsigned long tmp;
 881         u8 val = index / 2;
 882
 883         if (strict_strtoul(buf, 10, &tmp) < 0)
 884                 return -EINVAL;
 885         tmp = SENSORS_LIMIT(tmp, 0, 15);
 886
 887         mutex_lock(&data->update_lock);
 888         if (index % 1) {
 889                 tmp <<= 4;
 890                 data->temp_src[val] &= 0x0f;
 891         } else {
 892                 data->temp_src[val] &= 0xf0;
 893         }
 894         data->temp_src[val] |= tmp;
 895         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
 896         mutex_unlock(&data->update_lock);
 897
 898         return count;
 899 }
 900
 901 #define TEMP_PWM_ENABLE   0
 902 #define TEMP_PWM_FAN_MAP  1
 903 static ssize_t
 904 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 905                      char *buf)
 906 {
 907         struct i2c_client *client = to_i2c_client(dev);
 908         struct w83795_data *data = i2c_get_clientdata(client);
 909         struct sensor_device_attribute_2 *sensor_attr =
 910             to_sensor_dev_attr_2(attr);
 911         int nr = sensor_attr->nr;
 912         int index = sensor_attr->index;
 913         u8 tmp = 0xff;
 914
 915         switch (nr) {
 916         case TEMP_PWM_ENABLE:
 917                 tmp = (data->pwm_fcms[1] >> index) & 1;
 918                 if (tmp)
 919                         tmp = 4;
 920                 else
 921                         tmp = 3;
 922                 break;
 923         case TEMP_PWM_FAN_MAP:
 924                 tmp = data->pwm_tfmr[index];
 925                 break;
 926         }
 927
 928         return sprintf(buf, "%u\n", tmp);
 929 }
 930
 931 static ssize_t
 932 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 933           const char *buf, size_t count)
 934 {
 935         struct i2c_client *client = to_i2c_client(dev);
 936         struct w83795_data *data = i2c_get_clientdata(client);
 937         struct sensor_device_attribute_2 *sensor_attr =
 938             to_sensor_dev_attr_2(attr);
 939         int nr = sensor_attr->nr;
 940         int index = sensor_attr->index;
 941         unsigned long tmp;
 942
 943         if (strict_strtoul(buf, 10, &tmp) < 0)
 944                 return -EINVAL;
 945
 946         switch (nr) {
 947         case TEMP_PWM_ENABLE:
 948                 if ((tmp != 3) && (tmp != 4))
 949                         return -EINVAL;
 950                 tmp -= 3;
 951                 mutex_lock(&data->update_lock);
 952                 data->pwm_fcms[1] &= ~(1 << index);
 953                 data->pwm_fcms[1] |= tmp << index;
 954                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
 955                 mutex_unlock(&data->update_lock);
 956                 break;
 957         case TEMP_PWM_FAN_MAP:
 958                 mutex_lock(&data->update_lock);
 959                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
 960                 w83795_write(client, W83795_REG_TFMR(index), tmp);
 961                 data->pwm_tfmr[index] = tmp;
 962                 mutex_unlock(&data->update_lock);
 963                 break;
 964         }
 965         return count;
 966 }
 967
 968 #define FANIN_TARGET   0
 969 #define FANIN_TOL      1
 970 static ssize_t
 971 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
 972 {
 973         struct i2c_client *client = to_i2c_client(dev);
 974         struct w83795_data *data = i2c_get_clientdata(client);
 975         struct sensor_device_attribute_2 *sensor_attr =
 976             to_sensor_dev_attr_2(attr);
 977         int nr = sensor_attr->nr;
 978         int index = sensor_attr->index;
 979         u16 tmp = 0;
 980
 981         switch (nr) {
 982         case FANIN_TARGET:
 983                 tmp = fan_from_reg(data->target_speed[index]);
 984                 break;
 985         case FANIN_TOL:
 986                 tmp = data->tol_speed;
 987                 break;
 988         }
 989
 990         return sprintf(buf, "%u\n", tmp);
 991 }
 992
 993 static ssize_t
 994 store_fanin(struct device *dev, struct device_attribute *attr,
 995           const char *buf, size_t count)
 996 {
 997         struct i2c_client *client = to_i2c_client(dev);
 998         struct w83795_data *data = i2c_get_clientdata(client);
 999         struct sensor_device_attribute_2 *sensor_attr =
1000             to_sensor_dev_attr_2(attr);
1001         int nr = sensor_attr->nr;
1002         int index = sensor_attr->index;
1003         unsigned long val;
1004
1005         if (strict_strtoul(buf, 10, &val) < 0)
1006                 return -EINVAL;
1007
1008         mutex_lock(&data->update_lock);
1009         switch (nr) {
1010         case FANIN_TARGET:
1011                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
1012                 w83795_write(client, W83795_REG_FTSH(index), (val >> 4) & 0xff);
1013                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1014                 data->target_speed[index] = val;
1015                 break;
1016         case FANIN_TOL:
1017                 val = SENSORS_LIMIT(val, 0, 0x3f);
1018                 w83795_write(client, W83795_REG_TFTS, val);
1019                 data->tol_speed = val;
1020                 break;
1021         }
1022         mutex_unlock(&data->update_lock);
1023
1024         return count;
1025 }
1026
1027
1028 static ssize_t
1029 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1030 {
1031         struct i2c_client *client = to_i2c_client(dev);
1032         struct w83795_data *data = i2c_get_clientdata(client);
1033         struct sensor_device_attribute_2 *sensor_attr =
1034             to_sensor_dev_attr_2(attr);
1035         int nr = sensor_attr->nr;
1036         int index = sensor_attr->index;
1037         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1038
1039         return sprintf(buf, "%ld\n", tmp);
1040 }
1041
1042 static ssize_t
1043 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1044           const char *buf, size_t count)
1045 {
1046         struct i2c_client *client = to_i2c_client(dev);
1047         struct w83795_data *data = i2c_get_clientdata(client);
1048         struct sensor_device_attribute_2 *sensor_attr =
1049             to_sensor_dev_attr_2(attr);
1050         int nr = sensor_attr->nr;
1051         int index = sensor_attr->index;
1052         unsigned long val;
1053         u8 tmp;
1054
1055         if (strict_strtoul(buf, 10, &val) < 0)
1056                 return -EINVAL;
1057         val /= 1000;
1058
1059         mutex_lock(&data->update_lock);
1060         switch (nr) {
1061         case TEMP_PWM_TTTI:
1062                 val = SENSORS_LIMIT(val, 0, 0x7f);
1063                 w83795_write(client, W83795_REG_TTTI(index), val);
1064                 break;
1065         case TEMP_PWM_CTFS:
1066                 val = SENSORS_LIMIT(val, 0, 0x7f);
1067                 w83795_write(client, W83795_REG_CTFS(index), val);
1068                 break;
1069         case TEMP_PWM_HCT:
1070                 val = SENSORS_LIMIT(val, 0, 0x0f);
1071                 tmp = w83795_read(client, W83795_REG_HT(index));
1072                 tmp &= 0x0f;
1073                 tmp |= (val << 4) & 0xf0;
1074                 w83795_write(client, W83795_REG_HT(index), tmp);
1075                 break;
1076         case TEMP_PWM_HOT:
1077                 val = SENSORS_LIMIT(val, 0, 0x0f);
1078                 tmp = w83795_read(client, W83795_REG_HT(index));
1079                 tmp &= 0xf0;
1080                 tmp |= val & 0x0f;
1081                 w83795_write(client, W83795_REG_HT(index), tmp);
1082                 break;
1083         }
1084         data->pwm_temp[index][nr] = val;
1085         mutex_unlock(&data->update_lock);
1086
1087         return count;
1088 }
1089
1090 static ssize_t
1091 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1092 {
1093         struct i2c_client *client = to_i2c_client(dev);
1094         struct w83795_data *data = i2c_get_clientdata(client);
1095         struct sensor_device_attribute_2 *sensor_attr =
1096             to_sensor_dev_attr_2(attr);
1097         int nr = sensor_attr->nr;
1098         int index = sensor_attr->index;
1099
1100         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1101 }
1102
1103 static ssize_t
1104 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1105           const char *buf, size_t count)
1106 {
1107         struct i2c_client *client = to_i2c_client(dev);
1108         struct w83795_data *data = i2c_get_clientdata(client);
1109         struct sensor_device_attribute_2 *sensor_attr =
1110             to_sensor_dev_attr_2(attr);
1111         int nr = sensor_attr->nr;
1112         int index = sensor_attr->index;
1113         unsigned long val;
1114
1115         if (strict_strtoul(buf, 10, &val) < 0)
1116                 return -EINVAL;
1117
1118         mutex_lock(&data->update_lock);
1119         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1120         data->sf4_reg[index][SF4_PWM][nr] = val;
1121         mutex_unlock(&data->update_lock);
1122
1123         return count;
1124 }
1125
1126 static ssize_t
1127 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1128 {
1129         struct i2c_client *client = to_i2c_client(dev);
1130         struct w83795_data *data = i2c_get_clientdata(client);
1131         struct sensor_device_attribute_2 *sensor_attr =
1132             to_sensor_dev_attr_2(attr);
1133         int nr = sensor_attr->nr;
1134         int index = sensor_attr->index;
1135
1136         return sprintf(buf, "%u\n",
1137                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1138 }
1139
1140 static ssize_t
1141 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1142           const char *buf, size_t count)
1143 {
1144         struct i2c_client *client = to_i2c_client(dev);
1145         struct w83795_data *data = i2c_get_clientdata(client);
1146         struct sensor_device_attribute_2 *sensor_attr =
1147             to_sensor_dev_attr_2(attr);
1148         int nr = sensor_attr->nr;
1149         int index = sensor_attr->index;
1150         unsigned long val;
1151
1152         if (strict_strtoul(buf, 10, &val) < 0)
1153                 return -EINVAL;
1154         val /= 1000;
1155
1156         mutex_lock(&data->update_lock);
1157         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1158         data->sf4_reg[index][SF4_TEMP][nr] = val;
1159         mutex_unlock(&data->update_lock);
1160
1161         return count;
1162 }
1163
1164
1165 static ssize_t
1166 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1167 {
1168         struct sensor_device_attribute_2 *sensor_attr =
1169             to_sensor_dev_attr_2(attr);
1170         int nr = sensor_attr->nr;
1171         int index = sensor_attr->index;
1172         struct w83795_data *data = w83795_update_device(dev);
1173         long temp = temp_from_reg(data->temp[index][nr]);
1174
1175         if (TEMP_READ == nr)
1176                 temp += ((data->temp_read_vrlsb[index] >> VRLSB_SHIFT) & 0x03)
1177                         * 250;
1178         return sprintf(buf, "%ld\n", temp);
1179 }
1180
1181 static ssize_t
1182 store_temp(struct device *dev, struct device_attribute *attr,
1183            const char *buf, size_t count)
1184 {
1185         struct sensor_device_attribute_2 *sensor_attr =
1186             to_sensor_dev_attr_2(attr);
1187         int nr = sensor_attr->nr;
1188         int index = sensor_attr->index;
1189         struct i2c_client *client = to_i2c_client(dev);
1190         struct w83795_data *data = i2c_get_clientdata(client);
1191         long tmp;
1192
1193         if (strict_strtol(buf, 10, &tmp) < 0)
1194                 return -EINVAL;
1195
1196         mutex_lock(&data->update_lock);
1197         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1198         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1199         mutex_unlock(&data->update_lock);
1200         return count;
1201 }
1202
1203
1204 static ssize_t
1205 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1206 {
1207         struct i2c_client *client = to_i2c_client(dev);
1208         struct w83795_data *data = i2c_get_clientdata(client);
1209         struct sensor_device_attribute_2 *sensor_attr =
1210             to_sensor_dev_attr_2(attr);
1211         int index = sensor_attr->index;
1212         u8 tmp;
1213
1214         if (data->enable_dts == 0)
1215                 return sprintf(buf, "%d\n", 0);
1216
1217         if ((data->has_dts >> index) & 0x01) {
1218                 if (data->enable_dts & 2)
1219                         tmp = 5;
1220                 else
1221                         tmp = 6;
1222         } else {
1223                 tmp = 0;
1224         }
1225
1226         return sprintf(buf, "%d\n", tmp);
1227 }
1228
1229 static ssize_t
1230 show_dts(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 index = sensor_attr->index;
1235         struct w83795_data *data = w83795_update_device(dev);
1236         long temp = temp_from_reg(data->dts[index]);
1237
1238         temp += ((data->dts_read_vrlsb[index] >> VRLSB_SHIFT) & 0x03) * 250;
1239         return sprintf(buf, "%ld\n", temp);
1240 }
1241
1242 static ssize_t
1243 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1244 {
1245         struct sensor_device_attribute_2 *sensor_attr =
1246             to_sensor_dev_attr_2(attr);
1247         int nr = sensor_attr->nr;
1248         struct i2c_client *client = to_i2c_client(dev);
1249         struct w83795_data *data = i2c_get_clientdata(client);
1250         long temp = temp_from_reg(data->dts_ext[nr]);
1251
1252         return sprintf(buf, "%ld\n", temp);
1253 }
1254
1255 static ssize_t
1256 store_dts_ext(struct device *dev, struct device_attribute *attr,
1257            const char *buf, size_t count)
1258 {
1259         struct sensor_device_attribute_2 *sensor_attr =
1260             to_sensor_dev_attr_2(attr);
1261         int nr = sensor_attr->nr;
1262         struct i2c_client *client = to_i2c_client(dev);
1263         struct w83795_data *data = i2c_get_clientdata(client);
1264         long tmp;
1265
1266         if (strict_strtol(buf, 10, &tmp) < 0)
1267                 return -EINVAL;
1268
1269         mutex_lock(&data->update_lock);
1270         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1271         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1272         mutex_unlock(&data->update_lock);
1273         return count;
1274 }
1275
1276
1277 /*
1278         Type 3:  Thermal diode
1279         Type 4:  Thermistor
1280
1281         Temp5-6, default TR
1282         Temp1-4, default TD
1283 */
1284
1285 static ssize_t
1286 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1287 {
1288         struct i2c_client *client = to_i2c_client(dev);
1289         struct w83795_data *data = i2c_get_clientdata(client);
1290         struct sensor_device_attribute_2 *sensor_attr =
1291             to_sensor_dev_attr_2(attr);
1292         int index = sensor_attr->index;
1293         u8 tmp;
1294
1295         if (data->has_temp >> index & 0x01) {
1296                 if (data->temp_mode >> index & 0x01)
1297                         tmp = 3;
1298                 else
1299                         tmp = 4;
1300         } else {
1301                 tmp = 0;
1302         }
1303
1304         return sprintf(buf, "%d\n", tmp);
1305 }
1306
1307 static ssize_t
1308 store_temp_mode(struct device *dev, struct device_attribute *attr,
1309                 const char *buf, size_t count)
1310 {
1311         struct i2c_client *client = to_i2c_client(dev);
1312         struct w83795_data *data = i2c_get_clientdata(client);
1313         struct sensor_device_attribute_2 *sensor_attr =
1314             to_sensor_dev_attr_2(attr);
1315         int index = sensor_attr->index;
1316         unsigned long val;
1317         u8 tmp;
1318         u32 mask;
1319
1320         if (strict_strtoul(buf, 10, &val) < 0)
1321                 return -EINVAL;
1322         if ((val != 4) && (val != 3))
1323                 return -EINVAL;
1324         if ((index > 3) && (val == 3))
1325                 return -EINVAL;
1326
1327         mutex_lock(&data->update_lock);
1328         if (val == 3) {
1329                 val = TEMP_CTRL_TD;
1330                 data->has_temp |= 1 << index;
1331                 data->temp_mode |= 1 << index;
1332         } else if (val == 4) {
1333                 val = TEMP_CTRL_TR;
1334                 data->has_temp |= 1 << index;
1335                 tmp = 1 << index;
1336                 data->temp_mode &= ~tmp;
1337         }
1338
1339         if (index > 3)
1340                 tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
1341         else
1342                 tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1343
1344         mask = 0x03 << W83795_REG_TEMP_CTRL[index][TEMP_CTRL_SHIFT];
1345         tmp &= ~mask;
1346         tmp |= W83795_REG_TEMP_CTRL[index][val];
1347
1348         mask = 1 << W83795_REG_TEMP_CTRL[index][TEMP_CTRL_HASIN_SHIFT];
1349         data->has_in &= ~mask;
1350
1351         if (index > 3)
1352                 w83795_write(client, W83795_REG_TEMP_CTRL1, tmp);
1353         else
1354                 w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1355
1356         mutex_unlock(&data->update_lock);
1357         return count;
1358 }
1359
1360
1361 /* show/store VIN */
1362 static ssize_t
1363 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1364 {
1365         struct sensor_device_attribute_2 *sensor_attr =
1366             to_sensor_dev_attr_2(attr);
1367         int nr = sensor_attr->nr;
1368         int index = sensor_attr->index;
1369         struct w83795_data *data = w83795_update_device(dev);
1370         u16 val = data->in[index][nr];
1371         u8 lsb_idx;
1372
1373         switch (nr) {
1374         case IN_READ:
1375                 /* calculate this value again by sensors as sensors3.conf */
1376                 if ((index >= 17) &&
1377                     !((data->has_gain >> (index - 17)) & 1))
1378                         val *= 8;
1379                 break;
1380         case IN_MAX:
1381         case IN_LOW:
1382                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1383                 val <<= 2;
1384                 val |= (data->in_lsb[lsb_idx][nr] >>
1385                         IN_LSB_SHIFT_IDX[lsb_idx][IN_LSB_SHIFT]) & 0x03;
1386                 if ((index >= 17) &&
1387                     !((data->has_gain >> (index - 17)) & 1))
1388                         val *= 8;
1389                 break;
1390         }
1391         val = in_from_reg(index, val);
1392
1393         return sprintf(buf, "%d\n", val);
1394 }
1395
1396 static ssize_t
1397 store_in(struct device *dev, struct device_attribute *attr,
1398          const char *buf, size_t count)
1399 {
1400         struct sensor_device_attribute_2 *sensor_attr =
1401             to_sensor_dev_attr_2(attr);
1402         int nr = sensor_attr->nr;
1403         int index = sensor_attr->index;
1404         struct i2c_client *client = to_i2c_client(dev);
1405         struct w83795_data *data = i2c_get_clientdata(client);
1406         unsigned long val;
1407         u8 tmp;
1408         u8 lsb_idx;
1409
1410         if (strict_strtoul(buf, 10, &val) < 0)
1411                 return -EINVAL;
1412         val = in_to_reg(index, val);
1413
1414         if ((index >= 17) &&
1415             !((data->has_gain >> (index - 17)) & 1))
1416                 val /= 8;
1417         val = SENSORS_LIMIT(val, 0, 0x3FF);
1418         mutex_lock(&data->update_lock);
1419
1420         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1421         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1422         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1423         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1424         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1425         data->in_lsb[lsb_idx][nr] = tmp;
1426
1427         tmp = (val >> 2) & 0xff;
1428         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1429         data->in[index][nr] = tmp;
1430
1431         mutex_unlock(&data->update_lock);
1432         return count;
1433 }
1434
1435
1436 static ssize_t
1437 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1438 {
1439         struct sensor_device_attribute_2 *sensor_attr =
1440             to_sensor_dev_attr_2(attr);
1441         int nr = sensor_attr->nr;
1442         struct i2c_client *client = to_i2c_client(dev);
1443         struct w83795_data *data = i2c_get_clientdata(client);
1444         u16 val = data->setup_pwm[nr];
1445
1446         switch (nr) {
1447         case SETUP_PWM_UPTIME:
1448         case SETUP_PWM_DOWNTIME:
1449                 val = time_from_reg(val);
1450                 break;
1451         }
1452
1453         return sprintf(buf, "%d\n", val);
1454 }
1455
1456 static ssize_t
1457 store_sf_setup(struct device *dev, struct device_attribute *attr,
1458          const char *buf, size_t count)
1459 {
1460         struct sensor_device_attribute_2 *sensor_attr =
1461             to_sensor_dev_attr_2(attr);
1462         int nr = sensor_attr->nr;
1463         struct i2c_client *client = to_i2c_client(dev);
1464         struct w83795_data *data = i2c_get_clientdata(client);
1465         unsigned long val;
1466
1467         if (strict_strtoul(buf, 10, &val) < 0)
1468                 return -EINVAL;
1469
1470         switch (nr) {
1471         case SETUP_PWM_DEFAULT:
1472                 val = SENSORS_LIMIT(val, 0, 0xff);
1473                 break;
1474         case SETUP_PWM_UPTIME:
1475         case SETUP_PWM_DOWNTIME:
1476                 val = time_to_reg(val);
1477                 if (val == 0)
1478                         return -EINVAL;
1479                 break;
1480         }
1481
1482         mutex_lock(&data->update_lock);
1483         data->setup_pwm[nr] = val;
1484         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1485         mutex_unlock(&data->update_lock);
1486         return count;
1487 }
1488
1489
1490 #define NOT_USED                        -1
1491
1492 /* Don't change the attribute order, _max and _min are accessed by index
1493  * somewhere else in the code */
1494 #define SENSOR_ATTR_IN(index) {                                         \
1495         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1496                 IN_READ, index), \
1497         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1498                 store_in, IN_MAX, index),                               \
1499         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1500                 store_in, IN_LOW, index),                               \
1501         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1502                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1503         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1504                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1505                 index + ((index > 14) ? 1 : 0)) }
1506
1507 #define SENSOR_ATTR_FAN(index) {                                        \
1508         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1509                 NULL, FAN_INPUT, index - 1), \
1510         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1511                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1512         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1513                 NULL, ALARM_STATUS, index + 31),                        \
1514         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1515                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1516
1517 #define SENSOR_ATTR_PWM(index) {                                        \
1518         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1519                 store_pwm, PWM_OUTPUT, index - 1),                      \
1520         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1521                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1522         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1523                 show_pwm, store_pwm, PWM_START, index - 1),             \
1524         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1525                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1526         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,     \
1527                 show_pwm, store_pwm, PWM_FREQ, index - 1),       \
1528         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1529                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1530         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1531                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1532
1533 #define SENSOR_ATTR_DTS(index) {                                        \
1534         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1535                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1536         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1537                 NULL, NOT_USED, index - 7),                             \
1538         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1539                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1540         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1541                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1542         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1543                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1544         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1545                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1546         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1547                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1548         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1549                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1550
1551 #define SENSOR_ATTR_TEMP(index) {                                       \
1552         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1553                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1554         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1555                 NULL, TEMP_READ, index - 1),                            \
1556         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1557                 store_temp, TEMP_CRIT, index - 1),                      \
1558         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1559                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1560         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1561                 store_temp, TEMP_WARN, index - 1),                      \
1562         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1563                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1564         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1565                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1566                 index + (index > 4 ? 11 : 17)),                         \
1567         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1568                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1569                 index + (index > 4 ? 11 : 17)),                         \
1570         SENSOR_ATTR_2(temp##index##_source_sel, S_IWUSR | S_IRUGO,      \
1571                 show_temp_src, store_temp_src, NOT_USED, index - 1),    \
1572         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1573                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1574                 TEMP_PWM_ENABLE, index - 1),                            \
1575         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1576                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1577                 TEMP_PWM_FAN_MAP, index - 1),                           \
1578         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1579                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1580         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1581                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1582         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1583                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1584         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1585                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1586         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1587                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1588         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1589                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1590         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1591                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1592         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1593                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1594         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1595                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1596         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1597                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1598         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1599                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1600         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1601                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1602         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1603                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1604         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1605                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1606         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1607                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1608         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1609                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1610         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1611                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1612         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1613                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1614
1615
1616 static struct sensor_device_attribute_2 w83795_in[][5] = {
1617         SENSOR_ATTR_IN(0),
1618         SENSOR_ATTR_IN(1),
1619         SENSOR_ATTR_IN(2),
1620         SENSOR_ATTR_IN(3),
1621         SENSOR_ATTR_IN(4),
1622         SENSOR_ATTR_IN(5),
1623         SENSOR_ATTR_IN(6),
1624         SENSOR_ATTR_IN(7),
1625         SENSOR_ATTR_IN(8),
1626         SENSOR_ATTR_IN(9),
1627         SENSOR_ATTR_IN(10),
1628         SENSOR_ATTR_IN(11),
1629         SENSOR_ATTR_IN(12),
1630         SENSOR_ATTR_IN(13),
1631         SENSOR_ATTR_IN(14),
1632         SENSOR_ATTR_IN(15),
1633         SENSOR_ATTR_IN(16),
1634         SENSOR_ATTR_IN(17),
1635         SENSOR_ATTR_IN(18),
1636         SENSOR_ATTR_IN(19),
1637         SENSOR_ATTR_IN(20),
1638 };
1639
1640 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1641         SENSOR_ATTR_FAN(1),
1642         SENSOR_ATTR_FAN(2),
1643         SENSOR_ATTR_FAN(3),
1644         SENSOR_ATTR_FAN(4),
1645         SENSOR_ATTR_FAN(5),
1646         SENSOR_ATTR_FAN(6),
1647         SENSOR_ATTR_FAN(7),
1648         SENSOR_ATTR_FAN(8),
1649         SENSOR_ATTR_FAN(9),
1650         SENSOR_ATTR_FAN(10),
1651         SENSOR_ATTR_FAN(11),
1652         SENSOR_ATTR_FAN(12),
1653         SENSOR_ATTR_FAN(13),
1654         SENSOR_ATTR_FAN(14),
1655 };
1656
1657 static const struct sensor_device_attribute_2 w83795_temp[][29] = {
1658         SENSOR_ATTR_TEMP(1),
1659         SENSOR_ATTR_TEMP(2),
1660         SENSOR_ATTR_TEMP(3),
1661         SENSOR_ATTR_TEMP(4),
1662         SENSOR_ATTR_TEMP(5),
1663         SENSOR_ATTR_TEMP(6),
1664 };
1665
1666 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1667         SENSOR_ATTR_DTS(7),
1668         SENSOR_ATTR_DTS(8),
1669         SENSOR_ATTR_DTS(9),
1670         SENSOR_ATTR_DTS(10),
1671         SENSOR_ATTR_DTS(11),
1672         SENSOR_ATTR_DTS(12),
1673         SENSOR_ATTR_DTS(13),
1674         SENSOR_ATTR_DTS(14),
1675 };
1676
1677 static const struct sensor_device_attribute_2 w83795_pwm[][7] = {
1678         SENSOR_ATTR_PWM(1),
1679         SENSOR_ATTR_PWM(2),
1680         SENSOR_ATTR_PWM(3),
1681         SENSOR_ATTR_PWM(4),
1682         SENSOR_ATTR_PWM(5),
1683         SENSOR_ATTR_PWM(6),
1684         SENSOR_ATTR_PWM(7),
1685         SENSOR_ATTR_PWM(8),
1686 };
1687
1688 static const struct sensor_device_attribute_2 sda_single_files[] = {
1689         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1690                       store_chassis_clear, ALARM_STATUS, 46),
1691         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1692                       store_beep_enable, NOT_USED, NOT_USED),
1693         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1694                 store_fanin, FANIN_TOL, NOT_USED),
1695         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1696                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1697         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1698                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1699         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1700                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1701 };
1702
1703 /*
1704  * Driver interface
1705  */
1706
1707 static void w83795_init_client(struct i2c_client *client)
1708 {
1709         struct w83795_data *data = i2c_get_clientdata(client);
1710         static const u16 clkin[4] = {   /* in kHz */
1711                 14318, 24000, 33333, 48000
1712         };
1713         u8 config;
1714
1715         if (reset)
1716                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1717
1718         /* Start monitoring if needed */
1719         config = w83795_read(client, W83795_REG_CONFIG);
1720         if (!(config & W83795_REG_CONFIG_START)) {
1721                 dev_info(&client->dev, "Enabling monitoring operations\n");
1722                 w83795_write(client, W83795_REG_CONFIG,
1723                              config | W83795_REG_CONFIG_START);
1724         }
1725
1726         data->clkin = clkin[(config >> 3) & 0x3];
1727         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1728 }
1729
1730 static int w83795_get_device_id(struct i2c_client *client)
1731 {
1732         int device_id;
1733
1734         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1735
1736         /* Special case for rev. A chips; can't be checked first because later
1737            revisions emulate this for compatibility */
1738         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1739                 int alt_id;
1740
1741                 alt_id = i2c_smbus_read_byte_data(client,
1742                                                   W83795_REG_DEVICEID_A);
1743                 if (alt_id == 0x50)
1744                         device_id = alt_id;
1745         }
1746
1747         return device_id;
1748 }
1749
1750 /* Return 0 if detection is successful, -ENODEV otherwise */
1751 static int w83795_detect(struct i2c_client *client,
1752                          struct i2c_board_info *info)
1753 {
1754         int bank, vendor_id, device_id, expected, i2c_addr, config;
1755         struct i2c_adapter *adapter = client->adapter;
1756         unsigned short address = client->addr;
1757         const char *chip_name;
1758
1759         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1760                 return -ENODEV;
1761         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1762         if (bank < 0 || (bank & 0x7c)) {
1763                 dev_dbg(&adapter->dev,
1764                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1765                         address, "bank");
1766                 return -ENODEV;
1767         }
1768
1769         /* Check Nuvoton vendor ID */
1770         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1771         expected = bank & 0x80 ? 0x5c : 0xa3;
1772         if (vendor_id != expected) {
1773                 dev_dbg(&adapter->dev,
1774                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1775                         address, "vendor id");
1776                 return -ENODEV;
1777         }
1778
1779         /* Check device ID */
1780         device_id = w83795_get_device_id(client) |
1781                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1782         if ((device_id >> 4) != 0x795) {
1783                 dev_dbg(&adapter->dev,
1784                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1785                         address, "device id\n");
1786                 return -ENODEV;
1787         }
1788
1789         /* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1790            should match */
1791         if ((bank & 0x07) == 0) {
1792                 i2c_addr = i2c_smbus_read_byte_data(client,
1793                                                     W83795_REG_I2C_ADDR);
1794                 if ((i2c_addr & 0x7f) != address) {
1795                         dev_dbg(&adapter->dev,
1796                                 "w83795: Detection failed at addr 0x%02hx, "
1797                                 "check %s\n", address, "i2c addr");
1798                         return -ENODEV;
1799                 }
1800         }
1801
1802         /* Check 795 chip type: 795G or 795ADG
1803            Usually we don't write to chips during detection, but here we don't
1804            quite have the choice; hopefully it's OK, we are about to return
1805            success anyway */
1806         if ((bank & 0x07) != 0)
1807                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1808                                           bank & ~0x07);
1809         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1810         if (config & W83795_REG_CONFIG_CONFIG48)
1811                 chip_name = "w83795adg";
1812         else
1813                 chip_name = "w83795g";
1814
1815         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1816         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1817                  'A' + (device_id & 0xf), address);
1818
1819         return 0;
1820 }
1821
1822 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1823                                const struct device_attribute *))
1824 {
1825         struct w83795_data *data = dev_get_drvdata(dev);
1826         int err, i, j;
1827
1828         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
1829                 if (!(data->has_in & (1 << i)))
1830                         continue;
1831                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
1832                         err = fn(dev, &w83795_in[i][j].dev_attr);
1833                         if (err)
1834                                 return err;
1835                 }
1836         }
1837
1838         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
1839                 if (!(data->has_fan & (1 << i)))
1840                         continue;
1841                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
1842                         err = fn(dev, &w83795_fan[i][j].dev_attr);
1843                         if (err)
1844                                 return err;
1845                 }
1846         }
1847
1848         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1849                 err = fn(dev, &sda_single_files[i].dev_attr);
1850                 if (err)
1851                         return err;
1852         }
1853
1854         for (i = 0; i < data->has_pwm; i++) {
1855                 for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) {
1856                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
1857                         if (err)
1858                                 return err;
1859                 }
1860         }
1861
1862         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
1863                 if (!(data->has_temp & (1 << i)))
1864                         continue;
1865                 for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) {
1866                         err = fn(dev, &w83795_temp[i][j].dev_attr);
1867                         if (err)
1868                                 return err;
1869                 }
1870         }
1871
1872         if (data->enable_dts != 0) {
1873                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
1874                         if (!(data->has_dts & (1 << i)))
1875                                 continue;
1876                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
1877                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
1878                                 if (err)
1879                                         return err;
1880                         }
1881                 }
1882         }
1883
1884         return 0;
1885 }
1886
1887 /* We need a wrapper that fits in w83795_handle_files */
1888 static int device_remove_file_wrapper(struct device *dev,
1889                                       const struct device_attribute *attr)
1890 {
1891         device_remove_file(dev, attr);
1892         return 0;
1893 }
1894
1895 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
1896 {
1897         struct w83795_data *data = i2c_get_clientdata(client);
1898         u8 vid_ctl;
1899         int i, err_max, err_min;
1900
1901         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
1902
1903         /* Return immediately if VRM isn't configured */
1904         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
1905                 return;
1906
1907         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
1908         for (i = 0; i < 2; i++) {
1909                 if (!(data->has_dyn_in & (1 << i)))
1910                         continue;
1911
1912                 /* Voltage limits in dynamic mode, switch to read-only */
1913                 err_max = sysfs_chmod_file(&client->dev.kobj,
1914                                            &w83795_in[i][2].dev_attr.attr,
1915                                            S_IRUGO);
1916                 err_min = sysfs_chmod_file(&client->dev.kobj,
1917                                            &w83795_in[i][3].dev_attr.attr,
1918                                            S_IRUGO);
1919                 if (err_max || err_min)
1920                         dev_warn(&client->dev, "Failed to set in%d limits "
1921                                  "read-only (%d, %d)\n", i, err_max, err_min);
1922                 else
1923                         dev_info(&client->dev, "in%d limits set dynamically "
1924                                  "from VID\n", i);
1925         }
1926 }
1927
1928 /* Check pins that can be used for either temperature or voltage monitoring */
1929 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
1930                                      int temp_chan, int in_chan)
1931 {
1932         /* config is a 2-bit value */
1933         switch (config) {
1934         case 0x2: /* Voltage monitoring */
1935                 data->has_in |= 1 << in_chan;
1936                 break;
1937         case 0x1: /* Thermal diode */
1938                 if (temp_chan >= 4)
1939                         break;
1940                 data->temp_mode |= 1 << temp_chan;
1941                 /* fall through */
1942         case 0x3: /* Thermistor */
1943                 data->has_temp |= 1 << temp_chan;
1944                 break;
1945         }
1946 }
1947
1948 static int w83795_probe(struct i2c_client *client,
1949                         const struct i2c_device_id *id)
1950 {
1951         int i;
1952         u8 tmp;
1953         struct device *dev = &client->dev;
1954         struct w83795_data *data;
1955         int err;
1956
1957         data = kzalloc(sizeof(struct w83795_data), GFP_KERNEL);
1958         if (!data) {
1959                 err = -ENOMEM;
1960                 goto exit;
1961         }
1962
1963         i2c_set_clientdata(client, data);
1964         data->chip_type = id->driver_data;
1965         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1966         mutex_init(&data->update_lock);
1967
1968         /* Initialize the chip */
1969         w83795_init_client(client);
1970
1971         /* Check which voltages and fans are present */
1972         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
1973                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
1974         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
1975                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
1976
1977         /* Check which analog temperatures and extra voltages are present */
1978         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
1979         if (tmp & 0x20)
1980                 data->enable_dts = 1;
1981         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
1982         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
1983         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1984         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
1985         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
1986         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
1987         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
1988
1989         /* Check DTS enable status */
1990         if (data->enable_dts) {
1991                 if (1 & w83795_read(client, W83795_REG_DTSC))
1992                         data->enable_dts |= 2;
1993                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
1994         }
1995
1996         /* First update the voltages measured value and limits */
1997         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
1998                 if (!(data->has_in & (1 << i)))
1999                         continue;
2000                 data->in[i][IN_MAX] =
2001                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
2002                 data->in[i][IN_LOW] =
2003                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
2004                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
2005                 tmp |= (w83795_read(client, W83795_REG_VRLSB)
2006                         >> VRLSB_SHIFT) & 0x03;
2007                 data->in[i][IN_READ] = tmp;
2008         }
2009         for (i = 0; i < IN_LSB_REG_NUM; i++) {
2010                 data->in_lsb[i][IN_MAX] =
2011                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
2012                 data->in_lsb[i][IN_LOW] =
2013                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
2014         }
2015         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2016
2017         /* First update fan and limits */
2018         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2019                 if (!(data->has_fan & (1 << i)))
2020                         continue;
2021                 data->fan_min[i] =
2022                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
2023                 data->fan_min[i] |=
2024                   (w83795_read(client, W83795_REG_FAN_MIN_LSB(i)) >>
2025                         W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
2026                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
2027                 data->fan[i] |=
2028                   (w83795_read(client, W83795_REG_VRLSB) >> 4) & 0x0F;
2029         }
2030
2031         /* temperature and limits */
2032         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2033                 if (!(data->has_temp & (1 << i)))
2034                         continue;
2035                 data->temp[i][TEMP_CRIT] =
2036                         w83795_read(client, W83795_REG_TEMP[i][TEMP_CRIT]);
2037                 data->temp[i][TEMP_CRIT_HYST] =
2038                         w83795_read(client, W83795_REG_TEMP[i][TEMP_CRIT_HYST]);
2039                 data->temp[i][TEMP_WARN] =
2040                         w83795_read(client, W83795_REG_TEMP[i][TEMP_WARN]);
2041                 data->temp[i][TEMP_WARN_HYST] =
2042                         w83795_read(client, W83795_REG_TEMP[i][TEMP_WARN_HYST]);
2043                 data->temp[i][TEMP_READ] =
2044                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
2045                 data->temp_read_vrlsb[i] =
2046                         w83795_read(client, W83795_REG_VRLSB);
2047         }
2048
2049         /* dts temperature and limits */
2050         if (data->enable_dts != 0) {
2051                 data->dts_ext[DTS_CRIT] =
2052                         w83795_read(client, W83795_REG_DTS_EXT(DTS_CRIT));
2053                 data->dts_ext[DTS_CRIT_HYST] =
2054                         w83795_read(client, W83795_REG_DTS_EXT(DTS_CRIT_HYST));
2055                 data->dts_ext[DTS_WARN] =
2056                         w83795_read(client, W83795_REG_DTS_EXT(DTS_WARN));
2057                 data->dts_ext[DTS_WARN_HYST] =
2058                         w83795_read(client, W83795_REG_DTS_EXT(DTS_WARN_HYST));
2059                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
2060                         if (!(data->has_dts & (1 << i)))
2061                                 continue;
2062                         data->dts[i] = w83795_read(client, W83795_REG_DTS(i));
2063                         data->dts_read_vrlsb[i] =
2064                                 w83795_read(client, W83795_REG_VRLSB);
2065                 }
2066         }
2067
2068         /* First update temp source selction */
2069         for (i = 0; i < 3; i++)
2070                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
2071
2072         /* pwm and smart fan */
2073         if (data->chip_type == w83795g)
2074                 data->has_pwm = 8;
2075         else
2076                 data->has_pwm = 2;
2077         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
2078         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
2079         for (i = 0; i < W83795_REG_TEMP_NUM; i++)
2080                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
2081         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
2082         for (i = 0; i < data->has_pwm; i++) {
2083                 for (tmp = 0; tmp < 5; tmp++) {
2084                         data->pwm[i][tmp] =
2085                                 w83795_read(client, W83795_REG_PWM(i, tmp));
2086                 }
2087         }
2088         for (i = 0; i < 8; i++) {
2089                 data->target_speed[i] =
2090                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
2091                 data->target_speed[i] |=
2092                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
2093         }
2094         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
2095
2096         for (i = 0; i < W83795_REG_TEMP_NUM; i++) {
2097                 data->pwm_temp[i][TEMP_PWM_TTTI] =
2098                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
2099                 data->pwm_temp[i][TEMP_PWM_CTFS] =
2100                         w83795_read(client, W83795_REG_CTFS(i));
2101                 tmp = w83795_read(client, W83795_REG_HT(i));
2102                 data->pwm_temp[i][TEMP_PWM_HCT] = (tmp >> 4) & 0x0f;
2103                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
2104         }
2105         for (i = 0; i < W83795_REG_TEMP_NUM; i++) {
2106                 for (tmp = 0; tmp < 7; tmp++) {
2107                         data->sf4_reg[i][SF4_TEMP][tmp] =
2108                                 w83795_read(client,
2109                                             W83795_REG_SF4_TEMP(i, tmp));
2110                         data->sf4_reg[i][SF4_PWM][tmp] =
2111                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
2112                 }
2113         }
2114
2115         /* Setup PWM Register */
2116         for (i = 0; i < 3; i++) {
2117                 data->setup_pwm[i] =
2118                         w83795_read(client, W83795_REG_SETUP_PWM(i));
2119         }
2120
2121         /* alarm and beep */
2122         for (i = 0; i < ALARM_BEEP_REG_NUM; i++) {
2123                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
2124                 data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i));
2125         }
2126         data->beep_enable =
2127                 (w83795_read(client, W83795_REG_BEEP(5)) >> 7) & 0x01;
2128
2129         err = w83795_handle_files(dev, device_create_file);
2130         if (err)
2131                 goto exit_remove;
2132
2133         if (data->chip_type == w83795g)
2134                 w83795_check_dynamic_in_limits(client);
2135
2136         data->hwmon_dev = hwmon_device_register(dev);
2137         if (IS_ERR(data->hwmon_dev)) {
2138                 err = PTR_ERR(data->hwmon_dev);
2139                 goto exit_remove;
2140         }
2141
2142         return 0;
2143
2144 exit_remove:
2145         w83795_handle_files(dev, device_remove_file_wrapper);
2146         kfree(data);
2147 exit:
2148         return err;
2149 }
2150
2151 static int w83795_remove(struct i2c_client *client)
2152 {
2153         struct w83795_data *data = i2c_get_clientdata(client);
2154
2155         hwmon_device_unregister(data->hwmon_dev);
2156         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2157         kfree(data);
2158
2159         return 0;
2160 }
2161
2162
2163 static const struct i2c_device_id w83795_id[] = {
2164         { "w83795g", w83795g },
2165         { "w83795adg", w83795adg },
2166         { }
2167 };
2168 MODULE_DEVICE_TABLE(i2c, w83795_id);
2169
2170 static struct i2c_driver w83795_driver = {
2171         .driver = {
2172                    .name = "w83795",
2173         },
2174         .probe          = w83795_probe,
2175         .remove         = w83795_remove,
2176         .id_table       = w83795_id,
2177
2178         .class          = I2C_CLASS_HWMON,
2179         .detect         = w83795_detect,
2180         .address_list   = normal_i2c,
2181 };
2182
2183 static int __init sensors_w83795_init(void)
2184 {
2185         return i2c_add_driver(&w83795_driver);
2186 }
2187
2188 static void __exit sensors_w83795_exit(void)
2189 {
2190         i2c_del_driver(&w83795_driver);
2191 }
2192
2193 MODULE_AUTHOR("Wei Song");
2194 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2195 MODULE_LICENSE("GPL");
2196
2197 module_init(sensors_w83795_init);
2198 module_exit(sensors_w83795_exit);