drivers/hwmon/it87.c

   1 /*
   2  *  it87.c - Part of lm_sensors, Linux kernel modules for hardware
   3  *           monitoring.
   4  *
   5  *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a
   6  *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in
   7  *  addition to an Environment Controller (Enhanced Hardware Monitor and
   8  *  Fan Controller)
   9  *
  10  *  This driver supports only the Environment Controller in the IT8705F and
  11  *  similar parts.  The other devices are supported by different drivers.
  12  *
  13  *  Supports: IT8603E  Super I/O chip w/LPC interface
  14  *            IT8620E  Super I/O chip w/LPC interface
  15  *            IT8623E  Super I/O chip w/LPC interface
  16  *            IT8705F  Super I/O chip w/LPC interface
  17  *            IT8712F  Super I/O chip w/LPC interface
  18  *            IT8716F  Super I/O chip w/LPC interface
  19  *            IT8718F  Super I/O chip w/LPC interface
  20  *            IT8720F  Super I/O chip w/LPC interface
  21  *            IT8721F  Super I/O chip w/LPC interface
  22  *            IT8726F  Super I/O chip w/LPC interface
  23  *            IT8728F  Super I/O chip w/LPC interface
  24  *            IT8758E  Super I/O chip w/LPC interface
  25  *            IT8771E  Super I/O chip w/LPC interface
  26  *            IT8772E  Super I/O chip w/LPC interface
  27  *            IT8781F  Super I/O chip w/LPC interface
  28  *            IT8782F  Super I/O chip w/LPC interface
  29  *            IT8783E/F Super I/O chip w/LPC interface
  30  *            IT8786E  Super I/O chip w/LPC interface
  31  *            IT8790E  Super I/O chip w/LPC interface
  32  *            Sis950   A clone of the IT8705F
  33  *
  34  *  Copyright (C) 2001 Chris Gauthron
  35  *  Copyright (C) 2005-2010 Jean Delvare <jdelvare@suse.de>
  36  *
  37  *  This program is free software; you can redistribute it and/or modify
  38  *  it under the terms of the GNU General Public License as published by
  39  *  the Free Software Foundation; either version 2 of the License, or
  40  *  (at your option) any later version.
  41  *
  42  *  This program is distributed in the hope that it will be useful,
  43  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  44  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  45  *  GNU General Public License for more details.
  46  *
  47  *  You should have received a copy of the GNU General Public License
  48  *  along with this program; if not, write to the Free Software
  49  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  50  */
  51
  52 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  53
  54 #include <linux/module.h>
  55 #include <linux/init.h>
  56 #include <linux/slab.h>
  57 #include <linux/jiffies.h>
  58 #include <linux/platform_device.h>
  59 #include <linux/hwmon.h>
  60 #include <linux/hwmon-sysfs.h>
  61 #include <linux/hwmon-vid.h>
  62 #include <linux/err.h>
  63 #include <linux/mutex.h>
  64 #include <linux/sysfs.h>
  65 #include <linux/string.h>
  66 #include <linux/dmi.h>
  67 #include <linux/acpi.h>
  68 #include <linux/io.h>
  69
  70 #define DRVNAME "it87"
  71
  72 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
  73              it8772, it8781, it8782, it8783, it8786, it8790, it8603, it8620 };
  74
  75 static unsigned short force_id;
  76 module_param(force_id, ushort, 0);
  77 MODULE_PARM_DESC(force_id, "Override the detected device ID");
  78
  79 static struct platform_device *pdev;
  80
  81 #define REG     0x2e    /* The register to read/write */
  82 #define DEV     0x07    /* Register: Logical device select */
  83 #define VAL     0x2f    /* The value to read/write */
  84 #define PME     0x04    /* The device with the fan registers in it */
  85
  86 /* The device with the IT8718F/IT8720F VID value in it */
  87 #define GPIO    0x07
  88
  89 #define DEVID   0x20    /* Register: Device ID */
  90 #define DEVREV  0x22    /* Register: Device Revision */
  91
  92 static inline int superio_inb(int reg)
  93 {
  94         outb(reg, REG);
  95         return inb(VAL);
  96 }
  97
  98 static inline void superio_outb(int reg, int val)
  99 {
 100         outb(reg, REG);
 101         outb(val, VAL);
 102 }
 103
 104 static int superio_inw(int reg)
 105 {
 106         int val;
 107         outb(reg++, REG);
 108         val = inb(VAL) << 8;
 109         outb(reg, REG);
 110         val |= inb(VAL);
 111         return val;
 112 }
 113
 114 static inline void superio_select(int ldn)
 115 {
 116         outb(DEV, REG);
 117         outb(ldn, VAL);
 118 }
 119
 120 static inline int superio_enter(void)
 121 {
 122         /*
 123          * Try to reserve REG and REG + 1 for exclusive access.
 124          */
 125         if (!request_muxed_region(REG, 2, DRVNAME))
 126                 return -EBUSY;
 127
 128         outb(0x87, REG);
 129         outb(0x01, REG);
 130         outb(0x55, REG);
 131         outb(0x55, REG);
 132         return 0;
 133 }
 134
 135 static inline void superio_exit(void)
 136 {
 137         outb(0x02, REG);
 138         outb(0x02, VAL);
 139         release_region(REG, 2);
 140 }
 141
 142 /* Logical device 4 registers */
 143 #define IT8712F_DEVID 0x8712
 144 #define IT8705F_DEVID 0x8705
 145 #define IT8716F_DEVID 0x8716
 146 #define IT8718F_DEVID 0x8718
 147 #define IT8720F_DEVID 0x8720
 148 #define IT8721F_DEVID 0x8721
 149 #define IT8726F_DEVID 0x8726
 150 #define IT8728F_DEVID 0x8728
 151 #define IT8771E_DEVID 0x8771
 152 #define IT8772E_DEVID 0x8772
 153 #define IT8781F_DEVID 0x8781
 154 #define IT8782F_DEVID 0x8782
 155 #define IT8783E_DEVID 0x8783
 156 #define IT8786E_DEVID 0x8786
 157 #define IT8790E_DEVID 0x8790
 158 #define IT8603E_DEVID 0x8603
 159 #define IT8620E_DEVID 0x8620
 160 #define IT8623E_DEVID 0x8623
 161 #define IT87_ACT_REG  0x30
 162 #define IT87_BASE_REG 0x60
 163
 164 /* Logical device 7 registers (IT8712F and later) */
 165 #define IT87_SIO_GPIO1_REG      0x25
 166 #define IT87_SIO_GPIO2_REG      0x26
 167 #define IT87_SIO_GPIO3_REG      0x27
 168 #define IT87_SIO_GPIO5_REG      0x29
 169 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
 170 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
 171 #define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
 172 #define IT87_SIO_VID_REG        0xfc    /* VID value */
 173 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
 174
 175 /* Update battery voltage after every reading if true */
 176 static bool update_vbat;
 177
 178 /* Not all BIOSes properly configure the PWM registers */
 179 static bool fix_pwm_polarity;
 180
 181 /* Many IT87 constants specified below */
 182
 183 /* Length of ISA address segment */
 184 #define IT87_EXTENT 8
 185
 186 /* Length of ISA address segment for Environmental Controller */
 187 #define IT87_EC_EXTENT 2
 188
 189 /* Offset of EC registers from ISA base address */
 190 #define IT87_EC_OFFSET 5
 191
 192 /* Where are the ISA address/data registers relative to the EC base address */
 193 #define IT87_ADDR_REG_OFFSET 0
 194 #define IT87_DATA_REG_OFFSET 1
 195
 196 /*----- The IT87 registers -----*/
 197
 198 #define IT87_REG_CONFIG        0x00
 199
 200 #define IT87_REG_ALARM1        0x01
 201 #define IT87_REG_ALARM2        0x02
 202 #define IT87_REG_ALARM3        0x03
 203
 204 /*
 205  * The IT8718F and IT8720F have the VID value in a different register, in
 206  * Super-I/O configuration space.
 207  */
 208 #define IT87_REG_VID           0x0a
 209 /*
 210  * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
 211  * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
 212  * mode.
 213  */
 214 #define IT87_REG_FAN_DIV       0x0b
 215 #define IT87_REG_FAN_16BIT     0x0c
 216
 217 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 218
 219 static const u8 IT87_REG_FAN[]         = { 0x0d, 0x0e, 0x0f, 0x80, 0x82, 0x4c };
 220 static const u8 IT87_REG_FAN_MIN[]     = { 0x10, 0x11, 0x12, 0x84, 0x86, 0x4e };
 221 static const u8 IT87_REG_FANX[]        = { 0x18, 0x19, 0x1a, 0x81, 0x83, 0x4d };
 222 static const u8 IT87_REG_FANX_MIN[]    = { 0x1b, 0x1c, 0x1d, 0x85, 0x87, 0x4f };
 223 static const u8 IT87_REG_TEMP_OFFSET[] = { 0x56, 0x57, 0x59 };
 224
 225 #define IT87_REG_FAN_MAIN_CTRL 0x13
 226 #define IT87_REG_FAN_CTL       0x14
 227 #define IT87_REG_PWM(nr)       (0x15 + (nr))
 228 #define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
 229
 230 #define IT87_REG_VIN(nr)       (0x20 + (nr))
 231 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
 232
 233 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 234 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 235 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 236 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 237
 238 #define IT87_REG_VIN_ENABLE    0x50
 239 #define IT87_REG_TEMP_ENABLE   0x51
 240 #define IT87_REG_TEMP_EXTRA    0x55
 241 #define IT87_REG_BEEP_ENABLE   0x5c
 242
 243 #define IT87_REG_CHIPID        0x58
 244
 245 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 246 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 247
 248 struct it87_devices {
 249         const char *name;
 250         const char * const suffix;
 251         u16 features;
 252         u8 peci_mask;
 253         u8 old_peci_mask;
 254 };
 255
 256 #define FEAT_12MV_ADC           (1 << 0)
 257 #define FEAT_NEWER_AUTOPWM      (1 << 1)
 258 #define FEAT_OLD_AUTOPWM        (1 << 2)
 259 #define FEAT_16BIT_FANS         (1 << 3)
 260 #define FEAT_TEMP_OFFSET        (1 << 4)
 261 #define FEAT_TEMP_PECI          (1 << 5)
 262 #define FEAT_TEMP_OLD_PECI      (1 << 6)
 263 #define FEAT_FAN16_CONFIG       (1 << 7)        /* Need to enable 16-bit fans */
 264 #define FEAT_FIVE_FANS          (1 << 8)        /* Supports five fans */
 265 #define FEAT_VID                (1 << 9)        /* Set if chip supports VID */
 266 #define FEAT_IN7_INTERNAL       (1 << 10)       /* Set if in7 is internal */
 267 #define FEAT_SIX_FANS           (1 << 11)       /* Supports six fans */
 268
 269 static const struct it87_devices it87_devices[] = {
 270         [it87] = {
 271                 .name = "it87",
 272                 .suffix = "F",
 273                 .features = FEAT_OLD_AUTOPWM,   /* may need to overwrite */
 274         },
 275         [it8712] = {
 276                 .name = "it8712",
 277                 .suffix = "F",
 278                 .features = FEAT_OLD_AUTOPWM | FEAT_VID,
 279                                                 /* may need to overwrite */
 280         },
 281         [it8716] = {
 282                 .name = "it8716",
 283                 .suffix = "F",
 284                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 285                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 286         },
 287         [it8718] = {
 288                 .name = "it8718",
 289                 .suffix = "F",
 290                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 291                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 292                 .old_peci_mask = 0x4,
 293         },
 294         [it8720] = {
 295                 .name = "it8720",
 296                 .suffix = "F",
 297                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 298                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 299                 .old_peci_mask = 0x4,
 300         },
 301         [it8721] = {
 302                 .name = "it8721",
 303                 .suffix = "F",
 304                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 305                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
 306                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS | FEAT_IN7_INTERNAL,
 307                 .peci_mask = 0x05,
 308                 .old_peci_mask = 0x02,  /* Actually reports PCH */
 309         },
 310         [it8728] = {
 311                 .name = "it8728",
 312                 .suffix = "F",
 313                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 314                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS
 315                   | FEAT_IN7_INTERNAL,
 316                 .peci_mask = 0x07,
 317         },
 318         [it8771] = {
 319                 .name = "it8771",
 320                 .suffix = "E",
 321                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 322                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 323                                 /* PECI: guesswork */
 324                                 /* 12mV ADC (OHM) */
 325                                 /* 16 bit fans (OHM) */
 326                                 /* three fans, always 16 bit (guesswork) */
 327                 .peci_mask = 0x07,
 328         },
 329         [it8772] = {
 330                 .name = "it8772",
 331                 .suffix = "E",
 332                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 333                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 334                                 /* PECI (coreboot) */
 335                                 /* 12mV ADC (HWSensors4, OHM) */
 336                                 /* 16 bit fans (HWSensors4, OHM) */
 337                                 /* three fans, always 16 bit (datasheet) */
 338                 .peci_mask = 0x07,
 339         },
 340         [it8781] = {
 341                 .name = "it8781",
 342                 .suffix = "F",
 343                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 344                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 345                 .old_peci_mask = 0x4,
 346         },
 347         [it8782] = {
 348                 .name = "it8782",
 349                 .suffix = "F",
 350                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 351                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 352                 .old_peci_mask = 0x4,
 353         },
 354         [it8783] = {
 355                 .name = "it8783",
 356                 .suffix = "E/F",
 357                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 358                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 359                 .old_peci_mask = 0x4,
 360         },
 361         [it8786] = {
 362                 .name = "it8786",
 363                 .suffix = "E",
 364                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 365                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 366                 .peci_mask = 0x07,
 367         },
 368         [it8790] = {
 369                 .name = "it8790",
 370                 .suffix = "E",
 371                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 372                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 373                 .peci_mask = 0x07,
 374         },
 375         [it8603] = {
 376                 .name = "it8603",
 377                 .suffix = "E",
 378                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 379                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 380                 .peci_mask = 0x07,
 381         },
 382         [it8620] = {
 383                 .name = "it8620",
 384                 .suffix = "E",
 385                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 386                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_SIX_FANS
 387                   | FEAT_IN7_INTERNAL,
 388                 .peci_mask = 0x07,
 389         },
 390 };
 391
 392 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
 393 #define has_12mv_adc(data)      ((data)->features & FEAT_12MV_ADC)
 394 #define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
 395 #define has_old_autopwm(data)   ((data)->features & FEAT_OLD_AUTOPWM)
 396 #define has_temp_offset(data)   ((data)->features & FEAT_TEMP_OFFSET)
 397 #define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
 398                                  ((data)->peci_mask & (1 << nr)))
 399 #define has_temp_old_peci(data, nr) \
 400                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
 401                                  ((data)->old_peci_mask & (1 << nr)))
 402 #define has_fan16_config(data)  ((data)->features & FEAT_FAN16_CONFIG)
 403 #define has_five_fans(data)     ((data)->features & (FEAT_FIVE_FANS | \
 404                                                      FEAT_SIX_FANS))
 405 #define has_vid(data)           ((data)->features & FEAT_VID)
 406 #define has_in7_internal(data)  ((data)->features & FEAT_IN7_INTERNAL)
 407 #define has_six_fans(data)      ((data)->features & FEAT_SIX_FANS)
 408
 409 struct it87_sio_data {
 410         enum chips type;
 411         /* Values read from Super-I/O config space */
 412         u8 revision;
 413         u8 vid_value;
 414         u8 beep_pin;
 415         u8 internal;    /* Internal sensors can be labeled */
 416         /* Features skipped based on config or DMI */
 417         u16 skip_in;
 418         u8 skip_vid;
 419         u8 skip_fan;
 420         u8 skip_pwm;
 421         u8 skip_temp;
 422 };
 423
 424 /*
 425  * For each registered chip, we need to keep some data in memory.
 426  * The structure is dynamically allocated.
 427  */
 428 struct it87_data {
 429         struct device *hwmon_dev;
 430         enum chips type;
 431         u16 features;
 432         u8 peci_mask;
 433         u8 old_peci_mask;
 434
 435         unsigned short addr;
 436         const char *name;
 437         struct mutex update_lock;
 438         char valid;             /* !=0 if following fields are valid */
 439         unsigned long last_updated;     /* In jiffies */
 440
 441         u16 in_scaled;          /* Internal voltage sensors are scaled */
 442         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
 443         u8 has_fan;             /* Bitfield, fans enabled */
 444         u16 fan[6][2];          /* Register values, [nr][0]=fan, [1]=min */
 445         u8 has_temp;            /* Bitfield, temp sensors enabled */
 446         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
 447         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
 448         u8 extra;               /* Register value (IT87_REG_TEMP_EXTRA) */
 449         u8 fan_div[3];          /* Register encoding, shifted right */
 450         u8 vid;                 /* Register encoding, combined */
 451         u8 vrm;
 452         u32 alarms;             /* Register encoding, combined */
 453         u8 beeps;               /* Register encoding */
 454         u8 fan_main_ctrl;       /* Register value */
 455         u8 fan_ctl;             /* Register value */
 456
 457         /*
 458          * The following 3 arrays correspond to the same registers up to
 459          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
 460          * 7, and we want to preserve settings on mode changes, so we have
 461          * to track all values separately.
 462          * Starting with the IT8721F, the manual PWM duty cycles are stored
 463          * in separate registers (8-bit values), so the separate tracking
 464          * is no longer needed, but it is still done to keep the driver
 465          * simple.
 466          */
 467         u8 pwm_ctrl[3];         /* Register value */
 468         u8 pwm_duty[3];         /* Manual PWM value set by user */
 469         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
 470
 471         /* Automatic fan speed control registers */
 472         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
 473         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
 474 };
 475
 476 static int adc_lsb(const struct it87_data *data, int nr)
 477 {
 478         int lsb = has_12mv_adc(data) ? 12 : 16;
 479         if (data->in_scaled & (1 << nr))
 480                 lsb <<= 1;
 481         return lsb;
 482 }
 483
 484 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
 485 {
 486         val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
 487         return clamp_val(val, 0, 255);
 488 }
 489
 490 static int in_from_reg(const struct it87_data *data, int nr, int val)
 491 {
 492         return val * adc_lsb(data, nr);
 493 }
 494
 495 static inline u8 FAN_TO_REG(long rpm, int div)
 496 {
 497         if (rpm == 0)
 498                 return 255;
 499         rpm = clamp_val(rpm, 1, 1000000);
 500         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 501 }
 502
 503 static inline u16 FAN16_TO_REG(long rpm)
 504 {
 505         if (rpm == 0)
 506                 return 0xffff;
 507         return clamp_val((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 508 }
 509
 510 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
 511                                 1350000 / ((val) * (div)))
 512 /* The divider is fixed to 2 in 16-bit mode */
 513 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
 514                              1350000 / ((val) * 2))
 515
 516 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (((val) - 500) / 1000) : \
 517                                     ((val) + 500) / 1000), -128, 127))
 518 #define TEMP_FROM_REG(val) ((val) * 1000)
 519
 520 static u8 pwm_to_reg(const struct it87_data *data, long val)
 521 {
 522         if (has_newer_autopwm(data))
 523                 return val;
 524         else
 525                 return val >> 1;
 526 }
 527
 528 static int pwm_from_reg(const struct it87_data *data, u8 reg)
 529 {
 530         if (has_newer_autopwm(data))
 531                 return reg;
 532         else
 533                 return (reg & 0x7f) << 1;
 534 }
 535
 536
 537 static int DIV_TO_REG(int val)
 538 {
 539         int answer = 0;
 540         while (answer < 7 && (val >>= 1))
 541                 answer++;
 542         return answer;
 543 }
 544 #define DIV_FROM_REG(val) (1 << (val))
 545
 546 /*
 547  * PWM base frequencies. The frequency has to be divided by either 128 or 256,
 548  * depending on the chip type, to calculate the actual PWM frequency.
 549  *
 550  * Some of the chip datasheets suggest a base frequency of 51 kHz instead
 551  * of 750 kHz for the slowest base frequency, resulting in a PWM frequency
 552  * of 200 Hz. Sometimes both PWM frequency select registers are affected,
 553  * sometimes just one. It is unknown if this is a datasheet error or real,
 554  * so this is ignored for now.
 555  */
 556 static const unsigned int pwm_freq[8] = {
 557         48000000,
 558         24000000,
 559         12000000,
 560         8000000,
 561         6000000,
 562         3000000,
 563         1500000,
 564         750000,
 565 };
 566
 567 static int it87_probe(struct platform_device *pdev);
 568 static int it87_remove(struct platform_device *pdev);
 569
 570 static int it87_read_value(struct it87_data *data, u8 reg);
 571 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 572 static struct it87_data *it87_update_device(struct device *dev);
 573 static int it87_check_pwm(struct device *dev);
 574 static void it87_init_device(struct platform_device *pdev);
 575
 576
 577 static struct platform_driver it87_driver = {
 578         .driver = {
 579                 .name   = DRVNAME,
 580         },
 581         .probe  = it87_probe,
 582         .remove = it87_remove,
 583 };
 584
 585 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 586                        char *buf)
 587 {
 588         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 589         int nr = sattr->nr;
 590         int index = sattr->index;
 591
 592         struct it87_data *data = it87_update_device(dev);
 593         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
 594 }
 595
 596 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
 597                       const char *buf, size_t count)
 598 {
 599         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 600         int nr = sattr->nr;
 601         int index = sattr->index;
 602
 603         struct it87_data *data = dev_get_drvdata(dev);
 604         unsigned long val;
 605
 606         if (kstrtoul(buf, 10, &val) < 0)
 607                 return -EINVAL;
 608
 609         mutex_lock(&data->update_lock);
 610         data->in[nr][index] = in_to_reg(data, nr, val);
 611         it87_write_value(data,
 612                          index == 1 ? IT87_REG_VIN_MIN(nr)
 613                                     : IT87_REG_VIN_MAX(nr),
 614                          data->in[nr][index]);
 615         mutex_unlock(&data->update_lock);
 616         return count;
 617 }
 618
 619 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
 620 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
 621                             0, 1);
 622 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
 623                             0, 2);
 624
 625 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
 626 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
 627                             1, 1);
 628 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
 629                             1, 2);
 630
 631 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
 632 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
 633                             2, 1);
 634 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
 635                             2, 2);
 636
 637 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
 638 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
 639                             3, 1);
 640 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
 641                             3, 2);
 642
 643 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
 644 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
 645                             4, 1);
 646 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
 647                             4, 2);
 648
 649 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
 650 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
 651                             5, 1);
 652 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
 653                             5, 2);
 654
 655 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
 656 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
 657                             6, 1);
 658 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
 659                             6, 2);
 660
 661 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
 662 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
 663                             7, 1);
 664 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
 665                             7, 2);
 666
 667 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
 668 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
 669
 670 /* 3 temperatures */
 671 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 672                          char *buf)
 673 {
 674         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 675         int nr = sattr->nr;
 676         int index = sattr->index;
 677         struct it87_data *data = it87_update_device(dev);
 678
 679         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
 680 }
 681
 682 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 683                         const char *buf, size_t count)
 684 {
 685         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 686         int nr = sattr->nr;
 687         int index = sattr->index;
 688         struct it87_data *data = dev_get_drvdata(dev);
 689         long val;
 690         u8 reg, regval;
 691
 692         if (kstrtol(buf, 10, &val) < 0)
 693                 return -EINVAL;
 694
 695         mutex_lock(&data->update_lock);
 696
 697         switch (index) {
 698         default:
 699         case 1:
 700                 reg = IT87_REG_TEMP_LOW(nr);
 701                 break;
 702         case 2:
 703                 reg = IT87_REG_TEMP_HIGH(nr);
 704                 break;
 705         case 3:
 706                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
 707                 if (!(regval & 0x80)) {
 708                         regval |= 0x80;
 709                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
 710                 }
 711                 data->valid = 0;
 712                 reg = IT87_REG_TEMP_OFFSET[nr];
 713                 break;
 714         }
 715
 716         data->temp[nr][index] = TEMP_TO_REG(val);
 717         it87_write_value(data, reg, data->temp[nr][index]);
 718         mutex_unlock(&data->update_lock);
 719         return count;
 720 }
 721
 722 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
 723 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 724                             0, 1);
 725 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 726                             0, 2);
 727 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
 728                             set_temp, 0, 3);
 729 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
 730 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 731                             1, 1);
 732 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 733                             1, 2);
 734 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
 735                             set_temp, 1, 3);
 736 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
 737 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 738                             2, 1);
 739 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 740                             2, 2);
 741 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
 742                             set_temp, 2, 3);
 743
 744 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
 745                               char *buf)
 746 {
 747         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 748         int nr = sensor_attr->index;
 749         struct it87_data *data = it87_update_device(dev);
 750         u8 reg = data->sensor;      /* In case value is updated while used */
 751         u8 extra = data->extra;
 752
 753         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
 754             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
 755                 return sprintf(buf, "6\n");  /* Intel PECI */
 756         if (reg & (1 << nr))
 757                 return sprintf(buf, "3\n");  /* thermal diode */
 758         if (reg & (8 << nr))
 759                 return sprintf(buf, "4\n");  /* thermistor */
 760         return sprintf(buf, "0\n");      /* disabled */
 761 }
 762
 763 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
 764                              const char *buf, size_t count)
 765 {
 766         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 767         int nr = sensor_attr->index;
 768
 769         struct it87_data *data = dev_get_drvdata(dev);
 770         long val;
 771         u8 reg, extra;
 772
 773         if (kstrtol(buf, 10, &val) < 0)
 774                 return -EINVAL;
 775
 776         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 777         reg &= ~(1 << nr);
 778         reg &= ~(8 << nr);
 779         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
 780                 reg &= 0x3f;
 781         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
 782         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
 783                 extra &= 0x7f;
 784         if (val == 2) { /* backwards compatibility */
 785                 dev_warn(dev,
 786                          "Sensor type 2 is deprecated, please use 4 instead\n");
 787                 val = 4;
 788         }
 789         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
 790         if (val == 3)
 791                 reg |= 1 << nr;
 792         else if (val == 4)
 793                 reg |= 8 << nr;
 794         else if (has_temp_peci(data, nr) && val == 6)
 795                 reg |= (nr + 1) << 6;
 796         else if (has_temp_old_peci(data, nr) && val == 6)
 797                 extra |= 0x80;
 798         else if (val != 0)
 799                 return -EINVAL;
 800
 801         mutex_lock(&data->update_lock);
 802         data->sensor = reg;
 803         data->extra = extra;
 804         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 805         if (has_temp_old_peci(data, nr))
 806                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
 807         data->valid = 0;        /* Force cache refresh */
 808         mutex_unlock(&data->update_lock);
 809         return count;
 810 }
 811
 812 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
 813                           set_temp_type, 0);
 814 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
 815                           set_temp_type, 1);
 816 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
 817                           set_temp_type, 2);
 818
 819 /* 3 Fans */
 820
 821 static int pwm_mode(const struct it87_data *data, int nr)
 822 {
 823         int ctrl = data->fan_main_ctrl & (1 << nr);
 824
 825         if (ctrl == 0 && data->type != it8603)          /* Full speed */
 826                 return 0;
 827         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 828                 return 2;
 829         else                                            /* Manual mode */
 830                 return 1;
 831 }
 832
 833 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 834                         char *buf)
 835 {
 836         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 837         int nr = sattr->nr;
 838         int index = sattr->index;
 839         int speed;
 840         struct it87_data *data = it87_update_device(dev);
 841
 842         speed = has_16bit_fans(data) ?
 843                 FAN16_FROM_REG(data->fan[nr][index]) :
 844                 FAN_FROM_REG(data->fan[nr][index],
 845                              DIV_FROM_REG(data->fan_div[nr]));
 846         return sprintf(buf, "%d\n", speed);
 847 }
 848
 849 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 850                 char *buf)
 851 {
 852         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 853         int nr = sensor_attr->index;
 854
 855         struct it87_data *data = it87_update_device(dev);
 856         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 857 }
 858 static ssize_t show_pwm_enable(struct device *dev,
 859                 struct device_attribute *attr, char *buf)
 860 {
 861         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 862         int nr = sensor_attr->index;
 863
 864         struct it87_data *data = it87_update_device(dev);
 865         return sprintf(buf, "%d\n", pwm_mode(data, nr));
 866 }
 867 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 868                 char *buf)
 869 {
 870         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 871         int nr = sensor_attr->index;
 872
 873         struct it87_data *data = it87_update_device(dev);
 874         return sprintf(buf, "%d\n",
 875                        pwm_from_reg(data, data->pwm_duty[nr]));
 876 }
 877 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 878                 char *buf)
 879 {
 880         struct it87_data *data = it87_update_device(dev);
 881         int index = (data->fan_ctl >> 4) & 0x07;
 882         unsigned int freq;
 883
 884         freq = pwm_freq[index] / (has_newer_autopwm(data) ? 256 : 128);
 885
 886         return sprintf(buf, "%u\n", freq);
 887 }
 888
 889 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
 890                        const char *buf, size_t count)
 891 {
 892         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 893         int nr = sattr->nr;
 894         int index = sattr->index;
 895
 896         struct it87_data *data = dev_get_drvdata(dev);
 897         long val;
 898         u8 reg;
 899
 900         if (kstrtol(buf, 10, &val) < 0)
 901                 return -EINVAL;
 902
 903         mutex_lock(&data->update_lock);
 904
 905         if (has_16bit_fans(data)) {
 906                 data->fan[nr][index] = FAN16_TO_REG(val);
 907                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 908                                  data->fan[nr][index] & 0xff);
 909                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
 910                                  data->fan[nr][index] >> 8);
 911         } else {
 912                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
 913                 switch (nr) {
 914                 case 0:
 915                         data->fan_div[nr] = reg & 0x07;
 916                         break;
 917                 case 1:
 918                         data->fan_div[nr] = (reg >> 3) & 0x07;
 919                         break;
 920                 case 2:
 921                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 922                         break;
 923                 }
 924                 data->fan[nr][index] =
 925                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 926                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 927                                  data->fan[nr][index]);
 928         }
 929
 930         mutex_unlock(&data->update_lock);
 931         return count;
 932 }
 933
 934 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 935                 const char *buf, size_t count)
 936 {
 937         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 938         int nr = sensor_attr->index;
 939
 940         struct it87_data *data = dev_get_drvdata(dev);
 941         unsigned long val;
 942         int min;
 943         u8 old;
 944
 945         if (kstrtoul(buf, 10, &val) < 0)
 946                 return -EINVAL;
 947
 948         mutex_lock(&data->update_lock);
 949         old = it87_read_value(data, IT87_REG_FAN_DIV);
 950
 951         /* Save fan min limit */
 952         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
 953
 954         switch (nr) {
 955         case 0:
 956         case 1:
 957                 data->fan_div[nr] = DIV_TO_REG(val);
 958                 break;
 959         case 2:
 960                 if (val < 8)
 961                         data->fan_div[nr] = 1;
 962                 else
 963                         data->fan_div[nr] = 3;
 964         }
 965         val = old & 0x80;
 966         val |= (data->fan_div[0] & 0x07);
 967         val |= (data->fan_div[1] & 0x07) << 3;
 968         if (data->fan_div[2] == 3)
 969                 val |= 0x1 << 6;
 970         it87_write_value(data, IT87_REG_FAN_DIV, val);
 971
 972         /* Restore fan min limit */
 973         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 974         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
 975
 976         mutex_unlock(&data->update_lock);
 977         return count;
 978 }
 979
 980 /* Returns 0 if OK, -EINVAL otherwise */
 981 static int check_trip_points(struct device *dev, int nr)
 982 {
 983         const struct it87_data *data = dev_get_drvdata(dev);
 984         int i, err = 0;
 985
 986         if (has_old_autopwm(data)) {
 987                 for (i = 0; i < 3; i++) {
 988                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 989                                 err = -EINVAL;
 990                 }
 991                 for (i = 0; i < 2; i++) {
 992                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 993                                 err = -EINVAL;
 994                 }
 995         }
 996
 997         if (err) {
 998                 dev_err(dev,
 999                         "Inconsistent trip points, not switching to automatic mode\n");
1000                 dev_err(dev, "Adjust the trip points and try again\n");
1001         }
1002         return err;
1003 }
1004
1005 static ssize_t set_pwm_enable(struct device *dev,
1006                 struct device_attribute *attr, const char *buf, size_t count)
1007 {
1008         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1009         int nr = sensor_attr->index;
1010
1011         struct it87_data *data = dev_get_drvdata(dev);
1012         long val;
1013
1014         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
1015                 return -EINVAL;
1016
1017         /* Check trip points before switching to automatic mode */
1018         if (val == 2) {
1019                 if (check_trip_points(dev, nr) < 0)
1020                         return -EINVAL;
1021         }
1022
1023         /* IT8603E does not have on/off mode */
1024         if (val == 0 && data->type == it8603)
1025                 return -EINVAL;
1026
1027         mutex_lock(&data->update_lock);
1028
1029         if (val == 0) {
1030                 int tmp;
1031                 /* make sure the fan is on when in on/off mode */
1032                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1033                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
1034                 /* set on/off mode */
1035                 data->fan_main_ctrl &= ~(1 << nr);
1036                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1037                                  data->fan_main_ctrl);
1038         } else {
1039                 if (val == 1)                           /* Manual mode */
1040                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
1041                                              data->pwm_temp_map[nr] :
1042                                              data->pwm_duty[nr];
1043                 else                                    /* Automatic mode */
1044                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1045                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1046
1047                 if (data->type != it8603) {
1048                         /* set SmartGuardian mode */
1049                         data->fan_main_ctrl |= (1 << nr);
1050                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1051                                          data->fan_main_ctrl);
1052                 }
1053         }
1054
1055         mutex_unlock(&data->update_lock);
1056         return count;
1057 }
1058 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1059                 const char *buf, size_t count)
1060 {
1061         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1062         int nr = sensor_attr->index;
1063
1064         struct it87_data *data = dev_get_drvdata(dev);
1065         long val;
1066
1067         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1068                 return -EINVAL;
1069
1070         mutex_lock(&data->update_lock);
1071         if (has_newer_autopwm(data)) {
1072                 /*
1073                  * If we are in automatic mode, the PWM duty cycle register
1074                  * is read-only so we can't write the value.
1075                  */
1076                 if (data->pwm_ctrl[nr] & 0x80) {
1077                         mutex_unlock(&data->update_lock);
1078                         return -EBUSY;
1079                 }
1080                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1081                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1082                                  data->pwm_duty[nr]);
1083         } else {
1084                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1085                 /*
1086                  * If we are in manual mode, write the duty cycle immediately;
1087                  * otherwise, just store it for later use.
1088                  */
1089                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1090                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1091                         it87_write_value(data, IT87_REG_PWM(nr),
1092                                          data->pwm_ctrl[nr]);
1093                 }
1094         }
1095         mutex_unlock(&data->update_lock);
1096         return count;
1097 }
1098 static ssize_t set_pwm_freq(struct device *dev,
1099                 struct device_attribute *attr, const char *buf, size_t count)
1100 {
1101         struct it87_data *data = dev_get_drvdata(dev);
1102         unsigned long val;
1103         int i;
1104
1105         if (kstrtoul(buf, 10, &val) < 0)
1106                 return -EINVAL;
1107
1108         val = clamp_val(val, 0, 1000000);
1109         val *= has_newer_autopwm(data) ? 256 : 128;
1110
1111         /* Search for the nearest available frequency */
1112         for (i = 0; i < 7; i++) {
1113                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1114                         break;
1115         }
1116
1117         mutex_lock(&data->update_lock);
1118         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1119         data->fan_ctl |= i << 4;
1120         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1121         mutex_unlock(&data->update_lock);
1122
1123         return count;
1124 }
1125 static ssize_t show_pwm_temp_map(struct device *dev,
1126                 struct device_attribute *attr, char *buf)
1127 {
1128         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1129         int nr = sensor_attr->index;
1130
1131         struct it87_data *data = it87_update_device(dev);
1132         int map;
1133
1134         if (data->pwm_temp_map[nr] < 3)
1135                 map = 1 << data->pwm_temp_map[nr];
1136         else
1137                 map = 0;                        /* Should never happen */
1138         return sprintf(buf, "%d\n", map);
1139 }
1140 static ssize_t set_pwm_temp_map(struct device *dev,
1141                 struct device_attribute *attr, const char *buf, size_t count)
1142 {
1143         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1144         int nr = sensor_attr->index;
1145
1146         struct it87_data *data = dev_get_drvdata(dev);
1147         long val;
1148         u8 reg;
1149
1150         /*
1151          * This check can go away if we ever support automatic fan speed
1152          * control on newer chips.
1153          */
1154         if (!has_old_autopwm(data)) {
1155                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1156                 return -EINVAL;
1157         }
1158
1159         if (kstrtol(buf, 10, &val) < 0)
1160                 return -EINVAL;
1161
1162         switch (val) {
1163         case (1 << 0):
1164                 reg = 0x00;
1165                 break;
1166         case (1 << 1):
1167                 reg = 0x01;
1168                 break;
1169         case (1 << 2):
1170                 reg = 0x02;
1171                 break;
1172         default:
1173                 return -EINVAL;
1174         }
1175
1176         mutex_lock(&data->update_lock);
1177         data->pwm_temp_map[nr] = reg;
1178         /*
1179          * If we are in automatic mode, write the temp mapping immediately;
1180          * otherwise, just store it for later use.
1181          */
1182         if (data->pwm_ctrl[nr] & 0x80) {
1183                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1184                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1185         }
1186         mutex_unlock(&data->update_lock);
1187         return count;
1188 }
1189
1190 static ssize_t show_auto_pwm(struct device *dev,
1191                 struct device_attribute *attr, char *buf)
1192 {
1193         struct it87_data *data = it87_update_device(dev);
1194         struct sensor_device_attribute_2 *sensor_attr =
1195                         to_sensor_dev_attr_2(attr);
1196         int nr = sensor_attr->nr;
1197         int point = sensor_attr->index;
1198
1199         return sprintf(buf, "%d\n",
1200                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1201 }
1202
1203 static ssize_t set_auto_pwm(struct device *dev,
1204                 struct device_attribute *attr, const char *buf, size_t count)
1205 {
1206         struct it87_data *data = dev_get_drvdata(dev);
1207         struct sensor_device_attribute_2 *sensor_attr =
1208                         to_sensor_dev_attr_2(attr);
1209         int nr = sensor_attr->nr;
1210         int point = sensor_attr->index;
1211         long val;
1212
1213         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1214                 return -EINVAL;
1215
1216         mutex_lock(&data->update_lock);
1217         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1218         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1219                          data->auto_pwm[nr][point]);
1220         mutex_unlock(&data->update_lock);
1221         return count;
1222 }
1223
1224 static ssize_t show_auto_temp(struct device *dev,
1225                 struct device_attribute *attr, char *buf)
1226 {
1227         struct it87_data *data = it87_update_device(dev);
1228         struct sensor_device_attribute_2 *sensor_attr =
1229                         to_sensor_dev_attr_2(attr);
1230         int nr = sensor_attr->nr;
1231         int point = sensor_attr->index;
1232
1233         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1234 }
1235
1236 static ssize_t set_auto_temp(struct device *dev,
1237                 struct device_attribute *attr, const char *buf, size_t count)
1238 {
1239         struct it87_data *data = dev_get_drvdata(dev);
1240         struct sensor_device_attribute_2 *sensor_attr =
1241                         to_sensor_dev_attr_2(attr);
1242         int nr = sensor_attr->nr;
1243         int point = sensor_attr->index;
1244         long val;
1245
1246         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1247                 return -EINVAL;
1248
1249         mutex_lock(&data->update_lock);
1250         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1251         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1252                          data->auto_temp[nr][point]);
1253         mutex_unlock(&data->update_lock);
1254         return count;
1255 }
1256
1257 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1258 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1259                             0, 1);
1260 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1261                           set_fan_div, 0);
1262
1263 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1264 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1265                             1, 1);
1266 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1267                           set_fan_div, 1);
1268
1269 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1270 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1271                             2, 1);
1272 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1273                           set_fan_div, 2);
1274
1275 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1276 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1277                             3, 1);
1278
1279 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1280 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1281                             4, 1);
1282
1283 static SENSOR_DEVICE_ATTR_2(fan6_input, S_IRUGO, show_fan, NULL, 5, 0);
1284 static SENSOR_DEVICE_ATTR_2(fan6_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1285                             5, 1);
1286
1287 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1288                           show_pwm_enable, set_pwm_enable, 0);
1289 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1290 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1291 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1292                           show_pwm_temp_map, set_pwm_temp_map, 0);
1293 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1294                             show_auto_pwm, set_auto_pwm, 0, 0);
1295 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1296                             show_auto_pwm, set_auto_pwm, 0, 1);
1297 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1298                             show_auto_pwm, set_auto_pwm, 0, 2);
1299 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1300                             show_auto_pwm, NULL, 0, 3);
1301 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1302                             show_auto_temp, set_auto_temp, 0, 1);
1303 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1304                             show_auto_temp, set_auto_temp, 0, 0);
1305 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1306                             show_auto_temp, set_auto_temp, 0, 2);
1307 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1308                             show_auto_temp, set_auto_temp, 0, 3);
1309 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1310                             show_auto_temp, set_auto_temp, 0, 4);
1311
1312 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1313                           show_pwm_enable, set_pwm_enable, 1);
1314 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1315 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1316 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1317                           show_pwm_temp_map, set_pwm_temp_map, 1);
1318 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1319                             show_auto_pwm, set_auto_pwm, 1, 0);
1320 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1321                             show_auto_pwm, set_auto_pwm, 1, 1);
1322 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1323                             show_auto_pwm, set_auto_pwm, 1, 2);
1324 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1325                             show_auto_pwm, NULL, 1, 3);
1326 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1327                             show_auto_temp, set_auto_temp, 1, 1);
1328 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1329                             show_auto_temp, set_auto_temp, 1, 0);
1330 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1331                             show_auto_temp, set_auto_temp, 1, 2);
1332 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1333                             show_auto_temp, set_auto_temp, 1, 3);
1334 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1335                             show_auto_temp, set_auto_temp, 1, 4);
1336
1337 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1338                           show_pwm_enable, set_pwm_enable, 2);
1339 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1340 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1341 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1342                           show_pwm_temp_map, set_pwm_temp_map, 2);
1343 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1344                             show_auto_pwm, set_auto_pwm, 2, 0);
1345 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1346                             show_auto_pwm, set_auto_pwm, 2, 1);
1347 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1348                             show_auto_pwm, set_auto_pwm, 2, 2);
1349 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1350                             show_auto_pwm, NULL, 2, 3);
1351 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1352                             show_auto_temp, set_auto_temp, 2, 1);
1353 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1354                             show_auto_temp, set_auto_temp, 2, 0);
1355 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1356                             show_auto_temp, set_auto_temp, 2, 2);
1357 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1358                             show_auto_temp, set_auto_temp, 2, 3);
1359 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1360                             show_auto_temp, set_auto_temp, 2, 4);
1361
1362 /* Alarms */
1363 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1364                 char *buf)
1365 {
1366         struct it87_data *data = it87_update_device(dev);
1367         return sprintf(buf, "%u\n", data->alarms);
1368 }
1369 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1370
1371 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1372                 char *buf)
1373 {
1374         int bitnr = to_sensor_dev_attr(attr)->index;
1375         struct it87_data *data = it87_update_device(dev);
1376         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1377 }
1378
1379 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1380                 *attr, const char *buf, size_t count)
1381 {
1382         struct it87_data *data = dev_get_drvdata(dev);
1383         long val;
1384         int config;
1385
1386         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1387                 return -EINVAL;
1388
1389         mutex_lock(&data->update_lock);
1390         config = it87_read_value(data, IT87_REG_CONFIG);
1391         if (config < 0) {
1392                 count = config;
1393         } else {
1394                 config |= 1 << 5;
1395                 it87_write_value(data, IT87_REG_CONFIG, config);
1396                 /* Invalidate cache to force re-read */
1397                 data->valid = 0;
1398         }
1399         mutex_unlock(&data->update_lock);
1400
1401         return count;
1402 }
1403
1404 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1405 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1406 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1407 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1408 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1409 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1410 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1411 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1412 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1413 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1414 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1415 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1416 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1417 static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 7);
1418 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1419 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1420 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1421 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1422                           show_alarm, clear_intrusion, 4);
1423
1424 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1425                 char *buf)
1426 {
1427         int bitnr = to_sensor_dev_attr(attr)->index;
1428         struct it87_data *data = it87_update_device(dev);
1429         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1430 }
1431 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1432                 const char *buf, size_t count)
1433 {
1434         int bitnr = to_sensor_dev_attr(attr)->index;
1435         struct it87_data *data = dev_get_drvdata(dev);
1436         long val;
1437
1438         if (kstrtol(buf, 10, &val) < 0
1439          || (val != 0 && val != 1))
1440                 return -EINVAL;
1441
1442         mutex_lock(&data->update_lock);
1443         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1444         if (val)
1445                 data->beeps |= (1 << bitnr);
1446         else
1447                 data->beeps &= ~(1 << bitnr);
1448         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1449         mutex_unlock(&data->update_lock);
1450         return count;
1451 }
1452
1453 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1454                           show_beep, set_beep, 1);
1455 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1456 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1457 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1458 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1459 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1460 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1461 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1462 /* fanX_beep writability is set later */
1463 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1464 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1465 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1466 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1467 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1468 static SENSOR_DEVICE_ATTR(fan6_beep, S_IRUGO, show_beep, set_beep, 0);
1469 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1470                           show_beep, set_beep, 2);
1471 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1472 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1473
1474 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1475                 char *buf)
1476 {
1477         struct it87_data *data = dev_get_drvdata(dev);
1478         return sprintf(buf, "%u\n", data->vrm);
1479 }
1480 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1481                 const char *buf, size_t count)
1482 {
1483         struct it87_data *data = dev_get_drvdata(dev);
1484         unsigned long val;
1485
1486         if (kstrtoul(buf, 10, &val) < 0)
1487                 return -EINVAL;
1488
1489         data->vrm = val;
1490
1491         return count;
1492 }
1493 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1494
1495 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1496                 char *buf)
1497 {
1498         struct it87_data *data = it87_update_device(dev);
1499         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1500 }
1501 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1502
1503 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1504                 char *buf)
1505 {
1506         static const char * const labels[] = {
1507                 "+5V",
1508                 "5VSB",
1509                 "Vbat",
1510         };
1511         static const char * const labels_it8721[] = {
1512                 "+3.3V",
1513                 "3VSB",
1514                 "Vbat",
1515         };
1516         struct it87_data *data = dev_get_drvdata(dev);
1517         int nr = to_sensor_dev_attr(attr)->index;
1518
1519         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1520                                                        : labels[nr]);
1521 }
1522 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1523 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1524 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1525 /* special AVCC3 IT8603E in9 */
1526 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1527
1528 static ssize_t show_name(struct device *dev, struct device_attribute
1529                          *devattr, char *buf)
1530 {
1531         struct it87_data *data = dev_get_drvdata(dev);
1532         return sprintf(buf, "%s\n", data->name);
1533 }
1534 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1535
1536 static struct attribute *it87_attributes_in[10][5] = {
1537 {
1538         &sensor_dev_attr_in0_input.dev_attr.attr,
1539         &sensor_dev_attr_in0_min.dev_attr.attr,
1540         &sensor_dev_attr_in0_max.dev_attr.attr,
1541         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1542         NULL
1543 }, {
1544         &sensor_dev_attr_in1_input.dev_attr.attr,
1545         &sensor_dev_attr_in1_min.dev_attr.attr,
1546         &sensor_dev_attr_in1_max.dev_attr.attr,
1547         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1548         NULL
1549 }, {
1550         &sensor_dev_attr_in2_input.dev_attr.attr,
1551         &sensor_dev_attr_in2_min.dev_attr.attr,
1552         &sensor_dev_attr_in2_max.dev_attr.attr,
1553         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1554         NULL
1555 }, {
1556         &sensor_dev_attr_in3_input.dev_attr.attr,
1557         &sensor_dev_attr_in3_min.dev_attr.attr,
1558         &sensor_dev_attr_in3_max.dev_attr.attr,
1559         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1560         NULL
1561 }, {
1562         &sensor_dev_attr_in4_input.dev_attr.attr,
1563         &sensor_dev_attr_in4_min.dev_attr.attr,
1564         &sensor_dev_attr_in4_max.dev_attr.attr,
1565         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1566         NULL
1567 }, {
1568         &sensor_dev_attr_in5_input.dev_attr.attr,
1569         &sensor_dev_attr_in5_min.dev_attr.attr,
1570         &sensor_dev_attr_in5_max.dev_attr.attr,
1571         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1572         NULL
1573 }, {
1574         &sensor_dev_attr_in6_input.dev_attr.attr,
1575         &sensor_dev_attr_in6_min.dev_attr.attr,
1576         &sensor_dev_attr_in6_max.dev_attr.attr,
1577         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1578         NULL
1579 }, {
1580         &sensor_dev_attr_in7_input.dev_attr.attr,
1581         &sensor_dev_attr_in7_min.dev_attr.attr,
1582         &sensor_dev_attr_in7_max.dev_attr.attr,
1583         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1584         NULL
1585 }, {
1586         &sensor_dev_attr_in8_input.dev_attr.attr,
1587         NULL
1588 }, {
1589         &sensor_dev_attr_in9_input.dev_attr.attr,
1590         NULL
1591 } };
1592
1593 static const struct attribute_group it87_group_in[10] = {
1594         { .attrs = it87_attributes_in[0] },
1595         { .attrs = it87_attributes_in[1] },
1596         { .attrs = it87_attributes_in[2] },
1597         { .attrs = it87_attributes_in[3] },
1598         { .attrs = it87_attributes_in[4] },
1599         { .attrs = it87_attributes_in[5] },
1600         { .attrs = it87_attributes_in[6] },
1601         { .attrs = it87_attributes_in[7] },
1602         { .attrs = it87_attributes_in[8] },
1603         { .attrs = it87_attributes_in[9] },
1604 };
1605
1606 static struct attribute *it87_attributes_temp[3][6] = {
1607 {
1608         &sensor_dev_attr_temp1_input.dev_attr.attr,
1609         &sensor_dev_attr_temp1_max.dev_attr.attr,
1610         &sensor_dev_attr_temp1_min.dev_attr.attr,
1611         &sensor_dev_attr_temp1_type.dev_attr.attr,
1612         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1613         NULL
1614 } , {
1615         &sensor_dev_attr_temp2_input.dev_attr.attr,
1616         &sensor_dev_attr_temp2_max.dev_attr.attr,
1617         &sensor_dev_attr_temp2_min.dev_attr.attr,
1618         &sensor_dev_attr_temp2_type.dev_attr.attr,
1619         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1620         NULL
1621 } , {
1622         &sensor_dev_attr_temp3_input.dev_attr.attr,
1623         &sensor_dev_attr_temp3_max.dev_attr.attr,
1624         &sensor_dev_attr_temp3_min.dev_attr.attr,
1625         &sensor_dev_attr_temp3_type.dev_attr.attr,
1626         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1627         NULL
1628 } };
1629
1630 static const struct attribute_group it87_group_temp[3] = {
1631         { .attrs = it87_attributes_temp[0] },
1632         { .attrs = it87_attributes_temp[1] },
1633         { .attrs = it87_attributes_temp[2] },
1634 };
1635
1636 static struct attribute *it87_attributes_temp_offset[] = {
1637         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1638         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1639         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1640 };
1641
1642 static struct attribute *it87_attributes[] = {
1643         &dev_attr_alarms.attr,
1644         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1645         &dev_attr_name.attr,
1646         NULL
1647 };
1648
1649 static const struct attribute_group it87_group = {
1650         .attrs = it87_attributes,
1651 };
1652
1653 static struct attribute *it87_attributes_in_beep[] = {
1654         &sensor_dev_attr_in0_beep.dev_attr.attr,
1655         &sensor_dev_attr_in1_beep.dev_attr.attr,
1656         &sensor_dev_attr_in2_beep.dev_attr.attr,
1657         &sensor_dev_attr_in3_beep.dev_attr.attr,
1658         &sensor_dev_attr_in4_beep.dev_attr.attr,
1659         &sensor_dev_attr_in5_beep.dev_attr.attr,
1660         &sensor_dev_attr_in6_beep.dev_attr.attr,
1661         &sensor_dev_attr_in7_beep.dev_attr.attr,
1662         NULL,
1663         NULL,
1664 };
1665
1666 static struct attribute *it87_attributes_temp_beep[] = {
1667         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1668         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1669         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1670 };
1671
1672 static struct attribute *it87_attributes_fan[6][3+1] = { {
1673         &sensor_dev_attr_fan1_input.dev_attr.attr,
1674         &sensor_dev_attr_fan1_min.dev_attr.attr,
1675         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1676         NULL
1677 }, {
1678         &sensor_dev_attr_fan2_input.dev_attr.attr,
1679         &sensor_dev_attr_fan2_min.dev_attr.attr,
1680         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1681         NULL
1682 }, {
1683         &sensor_dev_attr_fan3_input.dev_attr.attr,
1684         &sensor_dev_attr_fan3_min.dev_attr.attr,
1685         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1686         NULL
1687 }, {
1688         &sensor_dev_attr_fan4_input.dev_attr.attr,
1689         &sensor_dev_attr_fan4_min.dev_attr.attr,
1690         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1691         NULL
1692 }, {
1693         &sensor_dev_attr_fan5_input.dev_attr.attr,
1694         &sensor_dev_attr_fan5_min.dev_attr.attr,
1695         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1696         NULL
1697 }, {
1698         &sensor_dev_attr_fan6_input.dev_attr.attr,
1699         &sensor_dev_attr_fan6_min.dev_attr.attr,
1700         &sensor_dev_attr_fan6_alarm.dev_attr.attr,
1701         NULL
1702 } };
1703
1704 static const struct attribute_group it87_group_fan[6] = {
1705         { .attrs = it87_attributes_fan[0] },
1706         { .attrs = it87_attributes_fan[1] },
1707         { .attrs = it87_attributes_fan[2] },
1708         { .attrs = it87_attributes_fan[3] },
1709         { .attrs = it87_attributes_fan[4] },
1710         { .attrs = it87_attributes_fan[5] },
1711 };
1712
1713 static const struct attribute *it87_attributes_fan_div[] = {
1714         &sensor_dev_attr_fan1_div.dev_attr.attr,
1715         &sensor_dev_attr_fan2_div.dev_attr.attr,
1716         &sensor_dev_attr_fan3_div.dev_attr.attr,
1717 };
1718
1719 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1720         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1721         &sensor_dev_attr_pwm1.dev_attr.attr,
1722         &dev_attr_pwm1_freq.attr,
1723         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1724         NULL
1725 }, {
1726         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1727         &sensor_dev_attr_pwm2.dev_attr.attr,
1728         &dev_attr_pwm2_freq.attr,
1729         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1730         NULL
1731 }, {
1732         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1733         &sensor_dev_attr_pwm3.dev_attr.attr,
1734         &dev_attr_pwm3_freq.attr,
1735         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1736         NULL
1737 } };
1738
1739 static const struct attribute_group it87_group_pwm[3] = {
1740         { .attrs = it87_attributes_pwm[0] },
1741         { .attrs = it87_attributes_pwm[1] },
1742         { .attrs = it87_attributes_pwm[2] },
1743 };
1744
1745 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1746         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1747         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1748         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1749         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1750         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1751         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1752         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1753         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1754         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1755         NULL
1756 }, {
1757         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1758         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1759         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1760         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1761         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1762         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1763         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1764         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1765         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1766         NULL
1767 }, {
1768         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1769         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1770         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1771         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1772         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1773         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1774         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1775         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1776         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1777         NULL
1778 } };
1779
1780 static const struct attribute_group it87_group_autopwm[3] = {
1781         { .attrs = it87_attributes_autopwm[0] },
1782         { .attrs = it87_attributes_autopwm[1] },
1783         { .attrs = it87_attributes_autopwm[2] },
1784 };
1785
1786 static struct attribute *it87_attributes_fan_beep[] = {
1787         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1788         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1789         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1790         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1791         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1792         &sensor_dev_attr_fan6_beep.dev_attr.attr,
1793 };
1794
1795 static struct attribute *it87_attributes_vid[] = {
1796         &dev_attr_vrm.attr,
1797         &dev_attr_cpu0_vid.attr,
1798         NULL
1799 };
1800
1801 static const struct attribute_group it87_group_vid = {
1802         .attrs = it87_attributes_vid,
1803 };
1804
1805 static struct attribute *it87_attributes_label[] = {
1806         &sensor_dev_attr_in3_label.dev_attr.attr,
1807         &sensor_dev_attr_in7_label.dev_attr.attr,
1808         &sensor_dev_attr_in8_label.dev_attr.attr,
1809         &sensor_dev_attr_in9_label.dev_attr.attr,
1810         NULL
1811 };
1812
1813 static const struct attribute_group it87_group_label = {
1814         .attrs = it87_attributes_label,
1815 };
1816
1817 /* SuperIO detection - will change isa_address if a chip is found */
1818 static int __init it87_find(unsigned short *address,
1819         struct it87_sio_data *sio_data)
1820 {
1821         int err;
1822         u16 chip_type;
1823         const char *board_vendor, *board_name;
1824
1825         err = superio_enter();
1826         if (err)
1827                 return err;
1828
1829         err = -ENODEV;
1830         chip_type = force_id ? force_id : superio_inw(DEVID);
1831
1832         switch (chip_type) {
1833         case IT8705F_DEVID:
1834                 sio_data->type = it87;
1835                 break;
1836         case IT8712F_DEVID:
1837                 sio_data->type = it8712;
1838                 break;
1839         case IT8716F_DEVID:
1840         case IT8726F_DEVID:
1841                 sio_data->type = it8716;
1842                 break;
1843         case IT8718F_DEVID:
1844                 sio_data->type = it8718;
1845                 break;
1846         case IT8720F_DEVID:
1847                 sio_data->type = it8720;
1848                 break;
1849         case IT8721F_DEVID:
1850                 sio_data->type = it8721;
1851                 break;
1852         case IT8728F_DEVID:
1853                 sio_data->type = it8728;
1854                 break;
1855         case IT8771E_DEVID:
1856                 sio_data->type = it8771;
1857                 break;
1858         case IT8772E_DEVID:
1859                 sio_data->type = it8772;
1860                 break;
1861         case IT8781F_DEVID:
1862                 sio_data->type = it8781;
1863                 break;
1864         case IT8782F_DEVID:
1865                 sio_data->type = it8782;
1866                 break;
1867         case IT8783E_DEVID:
1868                 sio_data->type = it8783;
1869                 break;
1870         case IT8786E_DEVID:
1871                 sio_data->type = it8786;
1872                 break;
1873         case IT8790E_DEVID:
1874                 sio_data->type = it8790;
1875                 break;
1876         case IT8603E_DEVID:
1877         case IT8623E_DEVID:
1878                 sio_data->type = it8603;
1879                 break;
1880         case IT8620E_DEVID:
1881                 sio_data->type = it8620;
1882                 break;
1883         case 0xffff:    /* No device at all */
1884                 goto exit;
1885         default:
1886                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1887                 goto exit;
1888         }
1889
1890         superio_select(PME);
1891         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1892                 pr_info("Device not activated, skipping\n");
1893                 goto exit;
1894         }
1895
1896         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1897         if (*address == 0) {
1898                 pr_info("Base address not set, skipping\n");
1899                 goto exit;
1900         }
1901
1902         err = 0;
1903         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1904         pr_info("Found IT%04x%s chip at 0x%x, revision %d\n", chip_type,
1905                 it87_devices[sio_data->type].suffix,
1906                 *address, sio_data->revision);
1907
1908         /* in7 (VSB or VCCH5V) is always internal on some chips */
1909         if (it87_devices[sio_data->type].features & FEAT_IN7_INTERNAL)
1910                 sio_data->internal |= (1 << 1);
1911
1912         /* in8 (Vbat) is always internal */
1913         sio_data->internal |= (1 << 2);
1914
1915         /* Only the IT8603E has in9 */
1916         if (sio_data->type != it8603)
1917                 sio_data->skip_in |= (1 << 9);
1918
1919         if (!(it87_devices[sio_data->type].features & FEAT_VID))
1920                 sio_data->skip_vid = 1;
1921
1922         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1923         if (sio_data->type == it87) {
1924                 /* The IT8705F has a different LD number for GPIO */
1925                 superio_select(5);
1926                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1927         } else if (sio_data->type == it8783) {
1928                 int reg25, reg27, reg2a, reg2c, regef;
1929
1930                 superio_select(GPIO);
1931
1932                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1933                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1934                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1935                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1936                 regef = superio_inb(IT87_SIO_SPI_REG);
1937
1938                 /* Check if fan3 is there or not */
1939                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1940                         sio_data->skip_fan |= (1 << 2);
1941                 if ((reg25 & (1 << 4))
1942                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1943                         sio_data->skip_pwm |= (1 << 2);
1944
1945                 /* Check if fan2 is there or not */
1946                 if (reg27 & (1 << 7))
1947                         sio_data->skip_fan |= (1 << 1);
1948                 if (reg27 & (1 << 3))
1949                         sio_data->skip_pwm |= (1 << 1);
1950
1951                 /* VIN5 */
1952                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1953                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1954
1955                 /* VIN6 */
1956                 if (reg27 & (1 << 1))
1957                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1958
1959                 /*
1960                  * VIN7
1961                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1962                  */
1963                 if (reg27 & (1 << 2)) {
1964                         /*
1965                          * The data sheet is a bit unclear regarding the
1966                          * internal voltage divider for VCCH5V. It says
1967                          * "This bit enables and switches VIN7 (pin 91) to the
1968                          * internal voltage divider for VCCH5V".
1969                          * This is different to other chips, where the internal
1970                          * voltage divider would connect VIN7 to an internal
1971                          * voltage source. Maybe that is the case here as well.
1972                          *
1973                          * Since we don't know for sure, re-route it if that is
1974                          * not the case, and ask the user to report if the
1975                          * resulting voltage is sane.
1976                          */
1977                         if (!(reg2c & (1 << 1))) {
1978                                 reg2c |= (1 << 1);
1979                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
1980                                 pr_notice("Routing internal VCCH5V to in7.\n");
1981                         }
1982                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1983                         pr_notice("Please report if it displays a reasonable voltage.\n");
1984                 }
1985
1986                 if (reg2c & (1 << 0))
1987                         sio_data->internal |= (1 << 0);
1988                 if (reg2c & (1 << 1))
1989                         sio_data->internal |= (1 << 1);
1990
1991                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1992         } else if (sio_data->type == it8603) {
1993                 int reg27, reg29;
1994
1995                 superio_select(GPIO);
1996
1997                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1998
1999                 /* Check if fan3 is there or not */
2000                 if (reg27 & (1 << 6))
2001                         sio_data->skip_pwm |= (1 << 2);
2002                 if (reg27 & (1 << 7))
2003                         sio_data->skip_fan |= (1 << 2);
2004
2005                 /* Check if fan2 is there or not */
2006                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
2007                 if (reg29 & (1 << 1))
2008                         sio_data->skip_pwm |= (1 << 1);
2009                 if (reg29 & (1 << 2))
2010                         sio_data->skip_fan |= (1 << 1);
2011
2012                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
2013                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
2014
2015                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
2016
2017                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2018         } else if (sio_data->type == it8620) {
2019                 int reg;
2020
2021                 superio_select(GPIO);
2022
2023                 /* Check for fan4, fan5 */
2024                 reg = superio_inb(IT87_SIO_GPIO2_REG);
2025                 if (!(reg & (1 << 5)))
2026                         sio_data->skip_fan |= (1 << 3);
2027                 if (!(reg & (1 << 4)))
2028                         sio_data->skip_fan |= (1 << 4);
2029
2030                 /* Check for pwm3, fan3 */
2031                 reg = superio_inb(IT87_SIO_GPIO3_REG);
2032                 if (reg & (1 << 6))
2033                         sio_data->skip_pwm |= (1 << 2);
2034                 if (reg & (1 << 7))
2035                         sio_data->skip_fan |= (1 << 2);
2036
2037                 /* Check for pwm2, fan2 */
2038                 reg = superio_inb(IT87_SIO_GPIO5_REG);
2039                 if (reg & (1 << 1))
2040                         sio_data->skip_pwm |= (1 << 1);
2041                 if (reg & (1 << 2))
2042                         sio_data->skip_fan |= (1 << 1);
2043
2044                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2045         } else {
2046                 int reg;
2047                 bool uart6;
2048
2049                 superio_select(GPIO);
2050
2051                 reg = superio_inb(IT87_SIO_GPIO3_REG);
2052                 if (!sio_data->skip_vid) {
2053                         /* We need at least 4 VID pins */
2054                         if (reg & 0x0f) {
2055                                 pr_info("VID is disabled (pins used for GPIO)\n");
2056                                 sio_data->skip_vid = 1;
2057                         }
2058                 }
2059
2060                 /* Check if fan3 is there or not */
2061                 if (reg & (1 << 6))
2062                         sio_data->skip_pwm |= (1 << 2);
2063                 if (reg & (1 << 7))
2064                         sio_data->skip_fan |= (1 << 2);
2065
2066                 /* Check if fan2 is there or not */
2067                 reg = superio_inb(IT87_SIO_GPIO5_REG);
2068                 if (reg & (1 << 1))
2069                         sio_data->skip_pwm |= (1 << 1);
2070                 if (reg & (1 << 2))
2071                         sio_data->skip_fan |= (1 << 1);
2072
2073                 if ((sio_data->type == it8718 || sio_data->type == it8720)
2074                  && !(sio_data->skip_vid))
2075                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
2076
2077                 reg = superio_inb(IT87_SIO_PINX2_REG);
2078
2079                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
2080
2081                 /*
2082                  * The IT8720F has no VIN7 pin, so VCCH should always be
2083                  * routed internally to VIN7 with an internal divider.
2084                  * Curiously, there still is a configuration bit to control
2085                  * this, which means it can be set incorrectly. And even
2086                  * more curiously, many boards out there are improperly
2087                  * configured, even though the IT8720F datasheet claims
2088                  * that the internal routing of VCCH to VIN7 is the default
2089                  * setting. So we force the internal routing in this case.
2090                  *
2091                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
2092                  * If UART6 is enabled, re-route VIN7 to the internal divider
2093                  * if that is not already the case.
2094                  */
2095                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
2096                         reg |= (1 << 1);
2097                         superio_outb(IT87_SIO_PINX2_REG, reg);
2098                         pr_notice("Routing internal VCCH to in7\n");
2099                 }
2100                 if (reg & (1 << 0))
2101                         sio_data->internal |= (1 << 0);
2102                 if (reg & (1 << 1))
2103                         sio_data->internal |= (1 << 1);
2104
2105                 /*
2106                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
2107                  * While VIN7 can be routed to the internal voltage divider,
2108                  * VIN5 and VIN6 are not available if UART6 is enabled.
2109                  *
2110                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
2111                  * is the temperature source. Since we can not read the
2112                  * temperature source here, skip_temp is preliminary.
2113                  */
2114                 if (uart6) {
2115                         sio_data->skip_in |= (1 << 5) | (1 << 6);
2116                         sio_data->skip_temp |= (1 << 2);
2117                 }
2118
2119                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2120         }
2121         if (sio_data->beep_pin)
2122                 pr_info("Beeping is supported\n");
2123
2124         /* Disable specific features based on DMI strings */
2125         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2126         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2127         if (board_vendor && board_name) {
2128                 if (strcmp(board_vendor, "nVIDIA") == 0
2129                  && strcmp(board_name, "FN68PT") == 0) {
2130                         /*
2131                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2132                          * connected to a fan, but to something else. One user
2133                          * has reported instant system power-off when changing
2134                          * the PWM2 duty cycle, so we disable it.
2135                          * I use the board name string as the trigger in case
2136                          * the same board is ever used in other systems.
2137                          */
2138                         pr_info("Disabling pwm2 due to hardware constraints\n");
2139                         sio_data->skip_pwm = (1 << 1);
2140                 }
2141         }
2142
2143 exit:
2144         superio_exit();
2145         return err;
2146 }
2147
2148 static void it87_remove_files(struct device *dev)
2149 {
2150         struct it87_data *data = platform_get_drvdata(pdev);
2151         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2152         int i;
2153
2154         sysfs_remove_group(&dev->kobj, &it87_group);
2155         for (i = 0; i < 10; i++) {
2156                 if (sio_data->skip_in & (1 << i))
2157                         continue;
2158                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2159                 if (it87_attributes_in_beep[i])
2160                         sysfs_remove_file(&dev->kobj,
2161                                           it87_attributes_in_beep[i]);
2162         }
2163         for (i = 0; i < 3; i++) {
2164                 if (!(data->has_temp & (1 << i)))
2165                         continue;
2166                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2167                 if (has_temp_offset(data))
2168                         sysfs_remove_file(&dev->kobj,
2169                                           it87_attributes_temp_offset[i]);
2170                 if (sio_data->beep_pin)
2171                         sysfs_remove_file(&dev->kobj,
2172                                           it87_attributes_temp_beep[i]);
2173         }
2174         for (i = 0; i < 6; i++) {
2175                 if (!(data->has_fan & (1 << i)))
2176                         continue;
2177                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2178                 if (sio_data->beep_pin)
2179                         sysfs_remove_file(&dev->kobj,
2180                                           it87_attributes_fan_beep[i]);
2181                 if (i < 3 && !has_16bit_fans(data))
2182                         sysfs_remove_file(&dev->kobj,
2183                                           it87_attributes_fan_div[i]);
2184         }
2185         for (i = 0; i < 3; i++) {
2186                 if (sio_data->skip_pwm & (1 << i))
2187                         continue;
2188                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2189                 if (has_old_autopwm(data))
2190                         sysfs_remove_group(&dev->kobj,
2191                                            &it87_group_autopwm[i]);
2192         }
2193         if (!sio_data->skip_vid)
2194                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2195         sysfs_remove_group(&dev->kobj, &it87_group_label);
2196 }
2197
2198 static int it87_probe(struct platform_device *pdev)
2199 {
2200         struct it87_data *data;
2201         struct resource *res;
2202         struct device *dev = &pdev->dev;
2203         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2204         int err = 0, i;
2205         int enable_pwm_interface;
2206         int fan_beep_need_rw;
2207
2208         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2209         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2210                                  DRVNAME)) {
2211                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2212                         (unsigned long)res->start,
2213                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2214                 return -EBUSY;
2215         }
2216
2217         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2218         if (!data)
2219                 return -ENOMEM;
2220
2221         data->addr = res->start;
2222         data->type = sio_data->type;
2223         data->features = it87_devices[sio_data->type].features;
2224         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2225         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2226         data->name = it87_devices[sio_data->type].name;
2227         /*
2228          * IT8705F Datasheet 0.4.1, 3h == Version G.
2229          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2230          * These are the first revisions with 16-bit tachometer support.
2231          */
2232         switch (data->type) {
2233         case it87:
2234                 if (sio_data->revision >= 0x03) {
2235                         data->features &= ~FEAT_OLD_AUTOPWM;
2236                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS;
2237                 }
2238                 break;
2239         case it8712:
2240                 if (sio_data->revision >= 0x08) {
2241                         data->features &= ~FEAT_OLD_AUTOPWM;
2242                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS |
2243                                           FEAT_FIVE_FANS;
2244                 }
2245                 break;
2246         default:
2247                 break;
2248         }
2249
2250         /* Now, we do the remaining detection. */
2251         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2252          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2253                 return -ENODEV;
2254
2255         platform_set_drvdata(pdev, data);
2256
2257         mutex_init(&data->update_lock);
2258
2259         /* Check PWM configuration */
2260         enable_pwm_interface = it87_check_pwm(dev);
2261
2262         /* Starting with IT8721F, we handle scaling of internal voltages */
2263         if (has_12mv_adc(data)) {
2264                 if (sio_data->internal & (1 << 0))
2265                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2266                 if (sio_data->internal & (1 << 1))
2267                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2268                 if (sio_data->internal & (1 << 2))
2269                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2270                 if (sio_data->internal & (1 << 3))
2271                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2272         } else if (sio_data->type == it8781 || sio_data->type == it8782 ||
2273                    sio_data->type == it8783) {
2274                 if (sio_data->internal & (1 << 0))
2275                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2276                 if (sio_data->internal & (1 << 1))
2277                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2278         }
2279
2280         data->has_temp = 0x07;
2281         if (sio_data->skip_temp & (1 << 2)) {
2282                 if (sio_data->type == it8782
2283                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2284                         data->has_temp &= ~(1 << 2);
2285         }
2286
2287         /* Initialize the IT87 chip */
2288         it87_init_device(pdev);
2289
2290         /* Register sysfs hooks */
2291         err = sysfs_create_group(&dev->kobj, &it87_group);
2292         if (err)
2293                 return err;
2294
2295         for (i = 0; i < 10; i++) {
2296                 if (sio_data->skip_in & (1 << i))
2297                         continue;
2298                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2299                 if (err)
2300                         goto error;
2301                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2302                         err = sysfs_create_file(&dev->kobj,
2303                                                 it87_attributes_in_beep[i]);
2304                         if (err)
2305                                 goto error;
2306                 }
2307         }
2308
2309         for (i = 0; i < 3; i++) {
2310                 if (!(data->has_temp & (1 << i)))
2311                         continue;
2312                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2313                 if (err)
2314                         goto error;
2315                 if (has_temp_offset(data)) {
2316                         err = sysfs_create_file(&dev->kobj,
2317                                                 it87_attributes_temp_offset[i]);
2318                         if (err)
2319                                 goto error;
2320                 }
2321                 if (sio_data->beep_pin) {
2322                         err = sysfs_create_file(&dev->kobj,
2323                                                 it87_attributes_temp_beep[i]);
2324                         if (err)
2325                                 goto error;
2326                 }
2327         }
2328
2329         /* Do not create fan files for disabled fans */
2330         fan_beep_need_rw = 1;
2331         for (i = 0; i < 6; i++) {
2332                 if (!(data->has_fan & (1 << i)))
2333                         continue;
2334                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2335                 if (err)
2336                         goto error;
2337
2338                 if (i < 3 && !has_16bit_fans(data)) {
2339                         err = sysfs_create_file(&dev->kobj,
2340                                                 it87_attributes_fan_div[i]);
2341                         if (err)
2342                                 goto error;
2343                 }
2344
2345                 if (sio_data->beep_pin) {
2346                         err = sysfs_create_file(&dev->kobj,
2347                                                 it87_attributes_fan_beep[i]);
2348                         if (err)
2349                                 goto error;
2350                         if (!fan_beep_need_rw)
2351                                 continue;
2352
2353                         /*
2354                          * As we have a single beep enable bit for all fans,
2355                          * only the first enabled fan has a writable attribute
2356                          * for it.
2357                          */
2358                         if (sysfs_chmod_file(&dev->kobj,
2359                                              it87_attributes_fan_beep[i],
2360                                              S_IRUGO | S_IWUSR))
2361                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2362                                         i + 1);
2363                         fan_beep_need_rw = 0;
2364                 }
2365         }
2366
2367         if (enable_pwm_interface) {
2368                 for (i = 0; i < 3; i++) {
2369                         if (sio_data->skip_pwm & (1 << i))
2370                                 continue;
2371                         err = sysfs_create_group(&dev->kobj,
2372                                                  &it87_group_pwm[i]);
2373                         if (err)
2374                                 goto error;
2375
2376                         if (!has_old_autopwm(data))
2377                                 continue;
2378                         err = sysfs_create_group(&dev->kobj,
2379                                                  &it87_group_autopwm[i]);
2380                         if (err)
2381                                 goto error;
2382                 }
2383         }
2384
2385         if (!sio_data->skip_vid) {
2386                 data->vrm = vid_which_vrm();
2387                 /* VID reading from Super-I/O config space if available */
2388                 data->vid = sio_data->vid_value;
2389                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2390                 if (err)
2391                         goto error;
2392         }
2393
2394         /* Export labels for internal sensors */
2395         for (i = 0; i < 4; i++) {
2396                 if (!(sio_data->internal & (1 << i)))
2397                         continue;
2398                 err = sysfs_create_file(&dev->kobj,
2399                                         it87_attributes_label[i]);
2400                 if (err)
2401                         goto error;
2402         }
2403
2404         data->hwmon_dev = hwmon_device_register(dev);
2405         if (IS_ERR(data->hwmon_dev)) {
2406                 err = PTR_ERR(data->hwmon_dev);
2407                 goto error;
2408         }
2409
2410         return 0;
2411
2412 error:
2413         it87_remove_files(dev);
2414         return err;
2415 }
2416
2417 static int it87_remove(struct platform_device *pdev)
2418 {
2419         struct it87_data *data = platform_get_drvdata(pdev);
2420
2421         hwmon_device_unregister(data->hwmon_dev);
2422         it87_remove_files(&pdev->dev);
2423
2424         return 0;
2425 }
2426
2427 /*
2428  * Must be called with data->update_lock held, except during initialization.
2429  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2430  * would slow down the IT87 access and should not be necessary.
2431  */
2432 static int it87_read_value(struct it87_data *data, u8 reg)
2433 {
2434         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2435         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2436 }
2437
2438 /*
2439  * Must be called with data->update_lock held, except during initialization.
2440  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2441  * would slow down the IT87 access and should not be necessary.
2442  */
2443 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2444 {
2445         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2446         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2447 }
2448
2449 /* Return 1 if and only if the PWM interface is safe to use */
2450 static int it87_check_pwm(struct device *dev)
2451 {
2452         struct it87_data *data = dev_get_drvdata(dev);
2453         /*
2454          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2455          * and polarity set to active low is sign that this is the case so we
2456          * disable pwm control to protect the user.
2457          */
2458         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2459         if ((tmp & 0x87) == 0) {
2460                 if (fix_pwm_polarity) {
2461                         /*
2462                          * The user asks us to attempt a chip reconfiguration.
2463                          * This means switching to active high polarity and
2464                          * inverting all fan speed values.
2465                          */
2466                         int i;
2467                         u8 pwm[3];
2468
2469                         for (i = 0; i < 3; i++)
2470                                 pwm[i] = it87_read_value(data,
2471                                                          IT87_REG_PWM(i));
2472
2473                         /*
2474                          * If any fan is in automatic pwm mode, the polarity
2475                          * might be correct, as suspicious as it seems, so we
2476                          * better don't change anything (but still disable the
2477                          * PWM interface).
2478                          */
2479                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2480                                 dev_info(dev,
2481                                          "Reconfiguring PWM to active high polarity\n");
2482                                 it87_write_value(data, IT87_REG_FAN_CTL,
2483                                                  tmp | 0x87);
2484                                 for (i = 0; i < 3; i++)
2485                                         it87_write_value(data,
2486                                                          IT87_REG_PWM(i),
2487                                                          0x7f & ~pwm[i]);
2488                                 return 1;
2489                         }
2490
2491                         dev_info(dev,
2492                                  "PWM configuration is too broken to be fixed\n");
2493                 }
2494
2495                 dev_info(dev,
2496                          "Detected broken BIOS defaults, disabling PWM interface\n");
2497                 return 0;
2498         } else if (fix_pwm_polarity) {
2499                 dev_info(dev,
2500                          "PWM configuration looks sane, won't touch\n");
2501         }
2502
2503         return 1;
2504 }
2505
2506 /* Called when we have found a new IT87. */
2507 static void it87_init_device(struct platform_device *pdev)
2508 {
2509         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2510         struct it87_data *data = platform_get_drvdata(pdev);
2511         int tmp, i;
2512         u8 mask;
2513
2514         /*
2515          * For each PWM channel:
2516          * - If it is in automatic mode, setting to manual mode should set
2517          *   the fan to full speed by default.
2518          * - If it is in manual mode, we need a mapping to temperature
2519          *   channels to use when later setting to automatic mode later.
2520          *   Use a 1:1 mapping by default (we are clueless.)
2521          * In both cases, the value can (and should) be changed by the user
2522          * prior to switching to a different mode.
2523          * Note that this is no longer needed for the IT8721F and later, as
2524          * these have separate registers for the temperature mapping and the
2525          * manual duty cycle.
2526          */
2527         for (i = 0; i < 3; i++) {
2528                 data->pwm_temp_map[i] = i;
2529                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2530                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2531         }
2532
2533         /*
2534          * Some chips seem to have default value 0xff for all limit
2535          * registers. For low voltage limits it makes no sense and triggers
2536          * alarms, so change to 0 instead. For high temperature limits, it
2537          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2538          * but is still confusing, so change to 127 degrees C.
2539          */
2540         for (i = 0; i < 8; i++) {
2541                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2542                 if (tmp == 0xff)
2543                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2544         }
2545         for (i = 0; i < 3; i++) {
2546                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2547                 if (tmp == 0xff)
2548                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2549         }
2550
2551         /*
2552          * Temperature channels are not forcibly enabled, as they can be
2553          * set to two different sensor types and we can't guess which one
2554          * is correct for a given system. These channels can be enabled at
2555          * run-time through the temp{1-3}_type sysfs accessors if needed.
2556          */
2557
2558         /* Check if voltage monitors are reset manually or by some reason */
2559         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2560         if ((tmp & 0xff) == 0) {
2561                 /* Enable all voltage monitors */
2562                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2563         }
2564
2565         /* Check if tachometers are reset manually or by some reason */
2566         mask = 0x70 & ~(sio_data->skip_fan << 4);
2567         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2568         if ((data->fan_main_ctrl & mask) == 0) {
2569                 /* Enable all fan tachometers */
2570                 data->fan_main_ctrl |= mask;
2571                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2572                                  data->fan_main_ctrl);
2573         }
2574         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2575
2576         tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2577
2578         /* Set tachometers to 16-bit mode if needed */
2579         if (has_fan16_config(data)) {
2580                 if (~tmp & 0x07 & data->has_fan) {
2581                         dev_dbg(&pdev->dev,
2582                                 "Setting fan1-3 to 16-bit mode\n");
2583                         it87_write_value(data, IT87_REG_FAN_16BIT,
2584                                          tmp | 0x07);
2585                 }
2586         }
2587
2588         /* Check for additional fans */
2589         if (has_five_fans(data)) {
2590                 if (tmp & (1 << 4))
2591                         data->has_fan |= (1 << 3); /* fan4 enabled */
2592                 if (tmp & (1 << 5))
2593                         data->has_fan |= (1 << 4); /* fan5 enabled */
2594                 if (has_six_fans(data) && (tmp & (1 << 2)))
2595                         data->has_fan |= (1 << 5); /* fan6 enabled */
2596         }
2597
2598         /* Fan input pins may be used for alternative functions */
2599         data->has_fan &= ~sio_data->skip_fan;
2600
2601         /* Start monitoring */
2602         it87_write_value(data, IT87_REG_CONFIG,
2603                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2604                          | (update_vbat ? 0x41 : 0x01));
2605 }
2606
2607 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2608 {
2609         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2610         if (has_newer_autopwm(data)) {
2611                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2612                 data->pwm_duty[nr] = it87_read_value(data,
2613                                                      IT87_REG_PWM_DUTY(nr));
2614         } else {
2615                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2616                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2617                 else                            /* Manual mode */
2618                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2619         }
2620
2621         if (has_old_autopwm(data)) {
2622                 int i;
2623
2624                 for (i = 0; i < 5 ; i++)
2625                         data->auto_temp[nr][i] = it87_read_value(data,
2626                                                 IT87_REG_AUTO_TEMP(nr, i));
2627                 for (i = 0; i < 3 ; i++)
2628                         data->auto_pwm[nr][i] = it87_read_value(data,
2629                                                 IT87_REG_AUTO_PWM(nr, i));
2630         }
2631 }
2632
2633 static struct it87_data *it87_update_device(struct device *dev)
2634 {
2635         struct it87_data *data = dev_get_drvdata(dev);
2636         int i;
2637
2638         mutex_lock(&data->update_lock);
2639
2640         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2641             || !data->valid) {
2642                 if (update_vbat) {
2643                         /*
2644                          * Cleared after each update, so reenable.  Value
2645                          * returned by this read will be previous value
2646                          */
2647                         it87_write_value(data, IT87_REG_CONFIG,
2648                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2649                 }
2650                 for (i = 0; i <= 7; i++) {
2651                         data->in[i][0] =
2652                                 it87_read_value(data, IT87_REG_VIN(i));
2653                         data->in[i][1] =
2654                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2655                         data->in[i][2] =
2656                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2657                 }
2658                 /* in8 (battery) has no limit registers */
2659                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2660                 if (data->type == it8603)
2661                         data->in[9][0] = it87_read_value(data, 0x2f);
2662
2663                 for (i = 0; i < 6; i++) {
2664                         /* Skip disabled fans */
2665                         if (!(data->has_fan & (1 << i)))
2666                                 continue;
2667
2668                         data->fan[i][1] =
2669                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2670                         data->fan[i][0] = it87_read_value(data,
2671                                        IT87_REG_FAN[i]);
2672                         /* Add high byte if in 16-bit mode */
2673                         if (has_16bit_fans(data)) {
2674                                 data->fan[i][0] |= it87_read_value(data,
2675                                                 IT87_REG_FANX[i]) << 8;
2676                                 data->fan[i][1] |= it87_read_value(data,
2677                                                 IT87_REG_FANX_MIN[i]) << 8;
2678                         }
2679                 }
2680                 for (i = 0; i < 3; i++) {
2681                         if (!(data->has_temp & (1 << i)))
2682                                 continue;
2683                         data->temp[i][0] =
2684                                 it87_read_value(data, IT87_REG_TEMP(i));
2685                         data->temp[i][1] =
2686                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2687                         data->temp[i][2] =
2688                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2689                         if (has_temp_offset(data))
2690                                 data->temp[i][3] =
2691                                   it87_read_value(data,
2692                                                   IT87_REG_TEMP_OFFSET[i]);
2693                 }
2694
2695                 /* Newer chips don't have clock dividers */
2696                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2697                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2698                         data->fan_div[0] = i & 0x07;
2699                         data->fan_div[1] = (i >> 3) & 0x07;
2700                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2701                 }
2702
2703                 data->alarms =
2704                         it87_read_value(data, IT87_REG_ALARM1) |
2705                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2706                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2707                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2708
2709                 data->fan_main_ctrl = it87_read_value(data,
2710                                 IT87_REG_FAN_MAIN_CTRL);
2711                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2712                 for (i = 0; i < 3; i++)
2713                         it87_update_pwm_ctrl(data, i);
2714
2715                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2716                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2717                 /*
2718                  * The IT8705F does not have VID capability.
2719                  * The IT8718F and later don't use IT87_REG_VID for the
2720                  * same purpose.
2721                  */
2722                 if (data->type == it8712 || data->type == it8716) {
2723                         data->vid = it87_read_value(data, IT87_REG_VID);
2724                         /*
2725                          * The older IT8712F revisions had only 5 VID pins,
2726                          * but we assume it is always safe to read 6 bits.
2727                          */
2728                         data->vid &= 0x3f;
2729                 }
2730                 data->last_updated = jiffies;
2731                 data->valid = 1;
2732         }
2733
2734         mutex_unlock(&data->update_lock);
2735
2736         return data;
2737 }
2738
2739 static int __init it87_device_add(unsigned short address,
2740                                   const struct it87_sio_data *sio_data)
2741 {
2742         struct resource res = {
2743                 .start  = address + IT87_EC_OFFSET,
2744                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2745                 .name   = DRVNAME,
2746                 .flags  = IORESOURCE_IO,
2747         };
2748         int err;
2749
2750         err = acpi_check_resource_conflict(&res);
2751         if (err)
2752                 goto exit;
2753
2754         pdev = platform_device_alloc(DRVNAME, address);
2755         if (!pdev) {
2756                 err = -ENOMEM;
2757                 pr_err("Device allocation failed\n");
2758                 goto exit;
2759         }
2760
2761         err = platform_device_add_resources(pdev, &res, 1);
2762         if (err) {
2763                 pr_err("Device resource addition failed (%d)\n", err);
2764                 goto exit_device_put;
2765         }
2766
2767         err = platform_device_add_data(pdev, sio_data,
2768                                        sizeof(struct it87_sio_data));
2769         if (err) {
2770                 pr_err("Platform data allocation failed\n");
2771                 goto exit_device_put;
2772         }
2773
2774         err = platform_device_add(pdev);
2775         if (err) {
2776                 pr_err("Device addition failed (%d)\n", err);
2777                 goto exit_device_put;
2778         }
2779
2780         return 0;
2781
2782 exit_device_put:
2783         platform_device_put(pdev);
2784 exit:
2785         return err;
2786 }
2787
2788 static int __init sm_it87_init(void)
2789 {
2790         int err;
2791         unsigned short isa_address = 0;
2792         struct it87_sio_data sio_data;
2793
2794         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2795         err = it87_find(&isa_address, &sio_data);
2796         if (err)
2797                 return err;
2798         err = platform_driver_register(&it87_driver);
2799         if (err)
2800                 return err;
2801
2802         err = it87_device_add(isa_address, &sio_data);
2803         if (err) {
2804                 platform_driver_unregister(&it87_driver);
2805                 return err;
2806         }
2807
2808         return 0;
2809 }
2810
2811 static void __exit sm_it87_exit(void)
2812 {
2813         platform_device_unregister(pdev);
2814         platform_driver_unregister(&it87_driver);
2815 }
2816
2817
2818 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2819 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2820 module_param(update_vbat, bool, 0);
2821 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2822 module_param(fix_pwm_polarity, bool, 0);
2823 MODULE_PARM_DESC(fix_pwm_polarity,
2824                  "Force PWM polarity to active high (DANGEROUS)");
2825 MODULE_LICENSE("GPL");
2826
2827 module_init(sm_it87_init);
2828 module_exit(sm_it87_exit);