git.sur5r.net Git - groeck-it87/blob - 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 #include "compat.h"
  70
  71 #define DRVNAME "it87"
  72
  73 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
  74              it8772, it8781, it8782, it8783, it8786, it8790, it8603, it8620 };
  75
  76 static unsigned short force_id;
  77 module_param(force_id, ushort, 0);
  78 MODULE_PARM_DESC(force_id, "Override the detected device ID");
  79
  80 static struct platform_device *pdev;
  81
  82 #define REG     0x2e    /* The register to read/write */
  83 #define DEV     0x07    /* Register: Logical device select */
  84 #define VAL     0x2f    /* The value to read/write */
  85 #define PME     0x04    /* The device with the fan registers in it */
  86
  87 /* The device with the IT8718F/IT8720F VID value in it */
  88 #define GPIO    0x07
  89
  90 #define DEVID   0x20    /* Register: Device ID */
  91 #define DEVREV  0x22    /* Register: Device Revision */
  92
  93 static inline int superio_inb(int reg)
  94 {
  95         outb(reg, REG);
  96         return inb(VAL);
  97 }
  98
  99 static inline void superio_outb(int reg, int val)
 100 {
 101         outb(reg, REG);
 102         outb(val, VAL);
 103 }
 104
 105 static int superio_inw(int reg)
 106 {
 107         int val;
 108         outb(reg++, REG);
 109         val = inb(VAL) << 8;
 110         outb(reg, REG);
 111         val |= inb(VAL);
 112         return val;
 113 }
 114
 115 static inline void superio_select(int ldn)
 116 {
 117         outb(DEV, REG);
 118         outb(ldn, VAL);
 119 }
 120
 121 static inline int superio_enter(void)
 122 {
 123         /*
 124          * Try to reserve REG and REG + 1 for exclusive access.
 125          */
 126         if (!request_muxed_region(REG, 2, DRVNAME))
 127                 return -EBUSY;
 128
 129         outb(0x87, REG);
 130         outb(0x01, REG);
 131         outb(0x55, REG);
 132         outb(0x55, REG);
 133         return 0;
 134 }
 135
 136 static inline void superio_exit(void)
 137 {
 138         outb(0x02, REG);
 139         outb(0x02, VAL);
 140         release_region(REG, 2);
 141 }
 142
 143 /* Logical device 4 registers */
 144 #define IT8712F_DEVID 0x8712
 145 #define IT8705F_DEVID 0x8705
 146 #define IT8716F_DEVID 0x8716
 147 #define IT8718F_DEVID 0x8718
 148 #define IT8720F_DEVID 0x8720
 149 #define IT8721F_DEVID 0x8721
 150 #define IT8726F_DEVID 0x8726
 151 #define IT8728F_DEVID 0x8728
 152 #define IT8771E_DEVID 0x8771
 153 #define IT8772E_DEVID 0x8772
 154 #define IT8781F_DEVID 0x8781
 155 #define IT8782F_DEVID 0x8782
 156 #define IT8783E_DEVID 0x8783
 157 #define IT8786E_DEVID 0x8786
 158 #define IT8603E_DEVID 0x8603
 159 #define IT8620E_DEVID 0x8620
 160 #define IT8623E_DEVID 0x8623
 161 #define IT8790E_DEVID 0x8790
 162 #define IT87_ACT_REG  0x30
 163 #define IT87_BASE_REG 0x60
 164
 165 /* Logical device 7 registers (IT8712F and later) */
 166 #define IT87_SIO_GPIO1_REG      0x25
 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_AVCC3          0x2f
 234
 235 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 236 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 237 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 238 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 239
 240 #define IT87_REG_VIN_ENABLE    0x50
 241 #define IT87_REG_TEMP_ENABLE   0x51
 242 #define IT87_REG_TEMP_EXTRA    0x55
 243 #define IT87_REG_BEEP_ENABLE   0x5c
 244
 245 #define IT87_REG_CHIPID        0x58
 246
 247 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 248 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 249
 250 struct it87_devices {
 251         const char *name;
 252         u16 features;
 253         u8 peci_mask;
 254         u8 old_peci_mask;
 255         const char * const suffix;
 256 };
 257
 258 #define FEAT_12MV_ADC           (1 << 0)
 259 #define FEAT_NEWER_AUTOPWM      (1 << 1)
 260 #define FEAT_OLD_AUTOPWM        (1 << 2)
 261 #define FEAT_16BIT_FANS         (1 << 3)
 262 #define FEAT_TEMP_OFFSET        (1 << 4)
 263 #define FEAT_TEMP_PECI          (1 << 5)
 264 #define FEAT_TEMP_OLD_PECI      (1 << 6)
 265 #define FEAT_FAN16_CONFIG       (1 << 7)        /* Need to enable 16-bit fans */
 266 #define FEAT_FIVE_FANS          (1 << 8)        /* Supports five fans */
 267 #define FEAT_SIX_FANS           (1 << 9)        /* Supports six fans */
 268 #define FEAT_VID                (1 << 10)       /* Set if chip supports VID */
 269 #define FEAT_IN7_INTERNAL       (1 << 11)       /* Set if in7 is internal */
 270 #define FEAT_AVCC3              (1 << 12)       /* Chip supports in9/AVCC3 */
 271
 272 static const struct it87_devices it87_devices[] = {
 273         [it87] = {
 274                 .name = "it87",
 275                 .features = FEAT_OLD_AUTOPWM,   /* may need to overwrite */
 276                 .suffix = "F",
 277         },
 278         [it8712] = {
 279                 .name = "it8712",
 280                 .features = FEAT_OLD_AUTOPWM | FEAT_VID,
 281                                                 /* may need to overwrite */
 282                 .suffix = "F",
 283         },
 284         [it8716] = {
 285                 .name = "it8716",
 286                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 287                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 288                 .suffix = "F",
 289         },
 290         [it8718] = {
 291                 .name = "it8718",
 292                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 293                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 294                 .old_peci_mask = 0x4,
 295                 .suffix = "F",
 296         },
 297         [it8720] = {
 298                 .name = "it8720",
 299                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 300                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 301                 .old_peci_mask = 0x4,
 302                 .suffix = "F",
 303         },
 304         [it8721] = {
 305                 .name = "it8721",
 306                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 307                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
 308                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS | FEAT_IN7_INTERNAL,
 309                 .peci_mask = 0x05,
 310                 .old_peci_mask = 0x02,  /* Actually reports PCH */
 311                 .suffix = "F",
 312         },
 313         [it8728] = {
 314                 .name = "it8728",
 315                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 316                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS
 317                   | FEAT_IN7_INTERNAL,
 318                 .peci_mask = 0x07,
 319                 .suffix = "F",
 320         },
 321         [it8771] = {
 322                 .name = "it8771",
 323                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 324                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 325                                 /* PECI: guesswork */
 326                                 /* 12mV ADC (OHM) */
 327                                 /* 16 bit fans (OHM) */
 328                                 /* three fans, always 16 bit (guesswork) */
 329                 .peci_mask = 0x07,
 330                 .suffix = "E",
 331         },
 332         [it8772] = {
 333                 .name = "it8772",
 334                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 335                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 336                                 /* PECI (coreboot) */
 337                                 /* 12mV ADC (HWSensors4, OHM) */
 338                                 /* 16 bit fans (HWSensors4, OHM) */
 339                                 /* three fans, always 16 bit (datasheet) */
 340                 .peci_mask = 0x07,
 341                 .suffix = "E",
 342         },
 343         [it8781] = {
 344                 .name = "it8781",
 345                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 346                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 347                 .old_peci_mask = 0x4,
 348                 .suffix = "F",
 349         },
 350         [it8782] = {
 351                 .name = "it8782",
 352                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 353                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 354                 .old_peci_mask = 0x4,
 355                 .suffix = "F",
 356         },
 357         [it8783] = {
 358                 .name = "it8783",
 359                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 360                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 361                 .old_peci_mask = 0x4,
 362                 .suffix = "E/F",
 363         },
 364         [it8786] = {
 365                 .name = "it8786",
 366                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 367                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 368                 .peci_mask = 0x07,
 369                 .suffix = "E",
 370         },
 371         [it8790] = {
 372                 .name = "it8790",
 373                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 374                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
 375                 .peci_mask = 0x07,
 376                 .suffix = "E",
 377         },
 378         [it8603] = {
 379                 .name = "it8603",
 380                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 381                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL
 382                   | FEAT_AVCC3,
 383                 .peci_mask = 0x07,
 384                 .suffix = "E",
 385         },
 386         [it8620] = {
 387                 .name = "it8620",
 388                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 389                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_SIX_FANS
 390                   | FEAT_IN7_INTERNAL | FEAT_AVCC3,
 391                 .peci_mask = 0x07,
 392                 .suffix = "E",
 393         },
 394 };
 395
 396 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
 397 #define has_12mv_adc(data)      ((data)->features & FEAT_12MV_ADC)
 398 #define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
 399 #define has_old_autopwm(data)   ((data)->features & FEAT_OLD_AUTOPWM)
 400 #define has_temp_offset(data)   ((data)->features & FEAT_TEMP_OFFSET)
 401 #define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
 402                                  ((data)->peci_mask & (1 << nr)))
 403 #define has_temp_old_peci(data, nr) \
 404                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
 405                                  ((data)->old_peci_mask & (1 << nr)))
 406 #define has_fan16_config(data)  ((data)->features & FEAT_FAN16_CONFIG)
 407 #define has_five_fans(data)     ((data)->features & (FEAT_FIVE_FANS | \
 408                                                      FEAT_SIX_FANS))
 409 #define has_six_fans(data)      ((data)->features & FEAT_SIX_FANS)
 410 #define has_vid(data)           ((data)->features & FEAT_VID)
 411 #define has_in7_internal(data)  ((data)->features & FEAT_IN7_INTERNAL)
 412 #define has_avcc3(data)         ((data)->features & FEAT_AVCC3)
 413
 414 struct it87_sio_data {
 415         enum chips type;
 416         /* Values read from Super-I/O config space */
 417         u8 revision;
 418         u8 vid_value;
 419         u8 beep_pin;
 420         u8 internal;    /* Internal sensors can be labeled */
 421         /* Features skipped based on config or DMI */
 422         u16 skip_in;
 423         u8 skip_vid;
 424         u8 skip_fan;
 425         u8 skip_pwm;
 426         u8 skip_temp;
 427 };
 428
 429 /*
 430  * For each registered chip, we need to keep some data in memory.
 431  * The structure is dynamically allocated.
 432  */
 433 struct it87_data {
 434         struct device *hwmon_dev;
 435         enum chips type;
 436         u16 features;
 437         u8 peci_mask;
 438         u8 old_peci_mask;
 439
 440         unsigned short addr;
 441         const char *name;
 442         struct mutex update_lock;
 443         char valid;             /* !=0 if following fields are valid */
 444         unsigned long last_updated;     /* In jiffies */
 445
 446         u16 in_scaled;          /* Internal voltage sensors are scaled */
 447         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
 448         u8 has_fan;             /* Bitfield, fans enabled */
 449         u16 fan[6][2];          /* Register values, [nr][0]=fan, [1]=min */
 450         u8 has_temp;            /* Bitfield, temp sensors enabled */
 451         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
 452         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
 453         u8 extra;               /* Register value (IT87_REG_TEMP_EXTRA) */
 454         u8 fan_div[3];          /* Register encoding, shifted right */
 455         u8 vid;                 /* Register encoding, combined */
 456         u8 vrm;
 457         u32 alarms;             /* Register encoding, combined */
 458         u8 beeps;               /* Register encoding */
 459         u8 fan_main_ctrl;       /* Register value */
 460         u8 fan_ctl;             /* Register value */
 461
 462         /*
 463          * The following 3 arrays correspond to the same registers up to
 464          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
 465          * 7, and we want to preserve settings on mode changes, so we have
 466          * to track all values separately.
 467          * Starting with the IT8721F, the manual PWM duty cycles are stored
 468          * in separate registers (8-bit values), so the separate tracking
 469          * is no longer needed, but it is still done to keep the driver
 470          * simple.
 471          */
 472         u8 pwm_ctrl[3];         /* Register value */
 473         u8 pwm_duty[3];         /* Manual PWM value set by user */
 474         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
 475
 476         /* Automatic fan speed control registers */
 477         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
 478         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
 479 };
 480
 481 static int adc_lsb(const struct it87_data *data, int nr)
 482 {
 483         int lsb = has_12mv_adc(data) ? 12 : 16;
 484         if (data->in_scaled & (1 << nr))
 485                 lsb <<= 1;
 486         return lsb;
 487 }
 488
 489 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
 490 {
 491         val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
 492         return clamp_val(val, 0, 255);
 493 }
 494
 495 static int in_from_reg(const struct it87_data *data, int nr, int val)
 496 {
 497         return val * adc_lsb(data, nr);
 498 }
 499
 500 static inline u8 FAN_TO_REG(long rpm, int div)
 501 {
 502         if (rpm == 0)
 503                 return 255;
 504         rpm = clamp_val(rpm, 1, 1000000);
 505         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 506 }
 507
 508 static inline u16 FAN16_TO_REG(long rpm)
 509 {
 510         if (rpm == 0)
 511                 return 0xffff;
 512         return clamp_val((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 513 }
 514
 515 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
 516                                 1350000 / ((val) * (div)))
 517 /* The divider is fixed to 2 in 16-bit mode */
 518 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
 519                              1350000 / ((val) * 2))
 520
 521 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (((val) - 500) / 1000) : \
 522                                     ((val) + 500) / 1000), -128, 127))
 523 #define TEMP_FROM_REG(val) ((val) * 1000)
 524
 525 static u8 pwm_to_reg(const struct it87_data *data, long val)
 526 {
 527         if (has_newer_autopwm(data))
 528                 return val;
 529         else
 530                 return val >> 1;
 531 }
 532
 533 static int pwm_from_reg(const struct it87_data *data, u8 reg)
 534 {
 535         if (has_newer_autopwm(data))
 536                 return reg;
 537         else
 538                 return (reg & 0x7f) << 1;
 539 }
 540
 541
 542 static int DIV_TO_REG(int val)
 543 {
 544         int answer = 0;
 545         while (answer < 7 && (val >>= 1))
 546                 answer++;
 547         return answer;
 548 }
 549 #define DIV_FROM_REG(val) (1 << (val))
 550
 551 static const unsigned int pwm_freq[8] = {
 552         48000000 / 128,
 553         24000000 / 128,
 554         12000000 / 128,
 555         8000000 / 128,
 556         6000000 / 128,
 557         3000000 / 128,
 558         1500000 / 128,
 559         750000 / 128,
 560 };
 561
 562 static int it87_probe(struct platform_device *pdev);
 563 static int it87_remove(struct platform_device *pdev);
 564
 565 static int it87_read_value(struct it87_data *data, u8 reg);
 566 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 567 static struct it87_data *it87_update_device(struct device *dev);
 568 static int it87_check_pwm(struct device *dev);
 569 static void it87_init_device(struct platform_device *pdev);
 570
 571
 572 static struct platform_driver it87_driver = {
 573         .driver = {
 574                 .name   = DRVNAME,
 575         },
 576         .probe  = it87_probe,
 577         .remove = it87_remove,
 578 };
 579
 580 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 581                        char *buf)
 582 {
 583         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 584         int nr = sattr->nr;
 585         int index = sattr->index;
 586
 587         struct it87_data *data = it87_update_device(dev);
 588         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
 589 }
 590
 591 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
 592                       const char *buf, size_t count)
 593 {
 594         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 595         int nr = sattr->nr;
 596         int index = sattr->index;
 597
 598         struct it87_data *data = dev_get_drvdata(dev);
 599         unsigned long val;
 600
 601         if (kstrtoul(buf, 10, &val) < 0)
 602                 return -EINVAL;
 603
 604         mutex_lock(&data->update_lock);
 605         data->in[nr][index] = in_to_reg(data, nr, val);
 606         it87_write_value(data,
 607                          index == 1 ? IT87_REG_VIN_MIN(nr)
 608                                     : IT87_REG_VIN_MAX(nr),
 609                          data->in[nr][index]);
 610         mutex_unlock(&data->update_lock);
 611         return count;
 612 }
 613
 614 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
 615 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
 616                             0, 1);
 617 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
 618                             0, 2);
 619
 620 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
 621 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
 622                             1, 1);
 623 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
 624                             1, 2);
 625
 626 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
 627 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
 628                             2, 1);
 629 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
 630                             2, 2);
 631
 632 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
 633 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
 634                             3, 1);
 635 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
 636                             3, 2);
 637
 638 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
 639 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
 640                             4, 1);
 641 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
 642                             4, 2);
 643
 644 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
 645 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
 646                             5, 1);
 647 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
 648                             5, 2);
 649
 650 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
 651 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
 652                             6, 1);
 653 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
 654                             6, 2);
 655
 656 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
 657 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
 658                             7, 1);
 659 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
 660                             7, 2);
 661
 662 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
 663 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
 664
 665 /* 3 temperatures */
 666 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 667                          char *buf)
 668 {
 669         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 670         int nr = sattr->nr;
 671         int index = sattr->index;
 672         struct it87_data *data = it87_update_device(dev);
 673
 674         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
 675 }
 676
 677 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 678                         const char *buf, size_t count)
 679 {
 680         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 681         int nr = sattr->nr;
 682         int index = sattr->index;
 683         struct it87_data *data = dev_get_drvdata(dev);
 684         long val;
 685         u8 reg, regval;
 686
 687         if (kstrtol(buf, 10, &val) < 0)
 688                 return -EINVAL;
 689
 690         mutex_lock(&data->update_lock);
 691
 692         switch (index) {
 693         default:
 694         case 1:
 695                 reg = IT87_REG_TEMP_LOW(nr);
 696                 break;
 697         case 2:
 698                 reg = IT87_REG_TEMP_HIGH(nr);
 699                 break;
 700         case 3:
 701                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
 702                 if (!(regval & 0x80)) {
 703                         regval |= 0x80;
 704                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
 705                 }
 706                 data->valid = 0;
 707                 reg = IT87_REG_TEMP_OFFSET[nr];
 708                 break;
 709         }
 710
 711         data->temp[nr][index] = TEMP_TO_REG(val);
 712         it87_write_value(data, reg, data->temp[nr][index]);
 713         mutex_unlock(&data->update_lock);
 714         return count;
 715 }
 716
 717 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
 718 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 719                             0, 1);
 720 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 721                             0, 2);
 722 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
 723                             set_temp, 0, 3);
 724 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
 725 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 726                             1, 1);
 727 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 728                             1, 2);
 729 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
 730                             set_temp, 1, 3);
 731 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
 732 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 733                             2, 1);
 734 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 735                             2, 2);
 736 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
 737                             set_temp, 2, 3);
 738
 739 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
 740                               char *buf)
 741 {
 742         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 743         int nr = sensor_attr->index;
 744         struct it87_data *data = it87_update_device(dev);
 745         u8 reg = data->sensor;      /* In case value is updated while used */
 746         u8 extra = data->extra;
 747
 748         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
 749             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
 750                 return sprintf(buf, "6\n");  /* Intel PECI */
 751         if (reg & (1 << nr))
 752                 return sprintf(buf, "3\n");  /* thermal diode */
 753         if (reg & (8 << nr))
 754                 return sprintf(buf, "4\n");  /* thermistor */
 755         return sprintf(buf, "0\n");      /* disabled */
 756 }
 757
 758 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
 759                              const char *buf, size_t count)
 760 {
 761         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 762         int nr = sensor_attr->index;
 763
 764         struct it87_data *data = dev_get_drvdata(dev);
 765         long val;
 766         u8 reg, extra;
 767
 768         if (kstrtol(buf, 10, &val) < 0)
 769                 return -EINVAL;
 770
 771         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 772         reg &= ~(1 << nr);
 773         reg &= ~(8 << nr);
 774         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
 775                 reg &= 0x3f;
 776         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
 777         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
 778                 extra &= 0x7f;
 779         if (val == 2) { /* backwards compatibility */
 780                 dev_warn(dev,
 781                          "Sensor type 2 is deprecated, please use 4 instead\n");
 782                 val = 4;
 783         }
 784         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
 785         if (val == 3)
 786                 reg |= 1 << nr;
 787         else if (val == 4)
 788                 reg |= 8 << nr;
 789         else if (has_temp_peci(data, nr) && val == 6)
 790                 reg |= (nr + 1) << 6;
 791         else if (has_temp_old_peci(data, nr) && val == 6)
 792                 extra |= 0x80;
 793         else if (val != 0)
 794                 return -EINVAL;
 795
 796         mutex_lock(&data->update_lock);
 797         data->sensor = reg;
 798         data->extra = extra;
 799         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 800         if (has_temp_old_peci(data, nr))
 801                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
 802         data->valid = 0;        /* Force cache refresh */
 803         mutex_unlock(&data->update_lock);
 804         return count;
 805 }
 806
 807 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
 808                           set_temp_type, 0);
 809 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
 810                           set_temp_type, 1);
 811 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
 812                           set_temp_type, 2);
 813
 814 /* 3 Fans */
 815
 816 static int pwm_mode(const struct it87_data *data, int nr)
 817 {
 818         int ctrl = data->fan_main_ctrl & (1 << nr);
 819
 820         if (ctrl == 0 && data->type != it8603)          /* Full speed */
 821                 return 0;
 822         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 823                 return 2;
 824         else                                            /* Manual mode */
 825                 return 1;
 826 }
 827
 828 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 829                         char *buf)
 830 {
 831         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 832         int nr = sattr->nr;
 833         int index = sattr->index;
 834         int speed;
 835         struct it87_data *data = it87_update_device(dev);
 836
 837         speed = has_16bit_fans(data) ?
 838                 FAN16_FROM_REG(data->fan[nr][index]) :
 839                 FAN_FROM_REG(data->fan[nr][index],
 840                              DIV_FROM_REG(data->fan_div[nr]));
 841         return sprintf(buf, "%d\n", speed);
 842 }
 843
 844 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 845                 char *buf)
 846 {
 847         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 848         int nr = sensor_attr->index;
 849
 850         struct it87_data *data = it87_update_device(dev);
 851         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 852 }
 853 static ssize_t show_pwm_enable(struct device *dev,
 854                 struct device_attribute *attr, char *buf)
 855 {
 856         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 857         int nr = sensor_attr->index;
 858
 859         struct it87_data *data = it87_update_device(dev);
 860         return sprintf(buf, "%d\n", pwm_mode(data, nr));
 861 }
 862 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 863                 char *buf)
 864 {
 865         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 866         int nr = sensor_attr->index;
 867
 868         struct it87_data *data = it87_update_device(dev);
 869         return sprintf(buf, "%d\n",
 870                        pwm_from_reg(data, data->pwm_duty[nr]));
 871 }
 872 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 873                 char *buf)
 874 {
 875         struct it87_data *data = it87_update_device(dev);
 876         int index = (data->fan_ctl >> 4) & 0x07;
 877
 878         return sprintf(buf, "%u\n", pwm_freq[index]);
 879 }
 880
 881 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
 882                        const char *buf, size_t count)
 883 {
 884         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 885         int nr = sattr->nr;
 886         int index = sattr->index;
 887
 888         struct it87_data *data = dev_get_drvdata(dev);
 889         long val;
 890         u8 reg;
 891
 892         if (kstrtol(buf, 10, &val) < 0)
 893                 return -EINVAL;
 894
 895         mutex_lock(&data->update_lock);
 896
 897         if (has_16bit_fans(data)) {
 898                 data->fan[nr][index] = FAN16_TO_REG(val);
 899                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 900                                  data->fan[nr][index] & 0xff);
 901                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
 902                                  data->fan[nr][index] >> 8);
 903         } else {
 904                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
 905                 switch (nr) {
 906                 case 0:
 907                         data->fan_div[nr] = reg & 0x07;
 908                         break;
 909                 case 1:
 910                         data->fan_div[nr] = (reg >> 3) & 0x07;
 911                         break;
 912                 case 2:
 913                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 914                         break;
 915                 }
 916                 data->fan[nr][index] =
 917                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 918                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 919                                  data->fan[nr][index]);
 920         }
 921
 922         mutex_unlock(&data->update_lock);
 923         return count;
 924 }
 925
 926 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 927                 const char *buf, size_t count)
 928 {
 929         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 930         int nr = sensor_attr->index;
 931
 932         struct it87_data *data = dev_get_drvdata(dev);
 933         unsigned long val;
 934         int min;
 935         u8 old;
 936
 937         if (kstrtoul(buf, 10, &val) < 0)
 938                 return -EINVAL;
 939
 940         mutex_lock(&data->update_lock);
 941         old = it87_read_value(data, IT87_REG_FAN_DIV);
 942
 943         /* Save fan min limit */
 944         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
 945
 946         switch (nr) {
 947         case 0:
 948         case 1:
 949                 data->fan_div[nr] = DIV_TO_REG(val);
 950                 break;
 951         case 2:
 952                 if (val < 8)
 953                         data->fan_div[nr] = 1;
 954                 else
 955                         data->fan_div[nr] = 3;
 956         }
 957         val = old & 0x80;
 958         val |= (data->fan_div[0] & 0x07);
 959         val |= (data->fan_div[1] & 0x07) << 3;
 960         if (data->fan_div[2] == 3)
 961                 val |= 0x1 << 6;
 962         it87_write_value(data, IT87_REG_FAN_DIV, val);
 963
 964         /* Restore fan min limit */
 965         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 966         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
 967
 968         mutex_unlock(&data->update_lock);
 969         return count;
 970 }
 971
 972 /* Returns 0 if OK, -EINVAL otherwise */
 973 static int check_trip_points(struct device *dev, int nr)
 974 {
 975         const struct it87_data *data = dev_get_drvdata(dev);
 976         int i, err = 0;
 977
 978         if (has_old_autopwm(data)) {
 979                 for (i = 0; i < 3; i++) {
 980                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 981                                 err = -EINVAL;
 982                 }
 983                 for (i = 0; i < 2; i++) {
 984                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 985                                 err = -EINVAL;
 986                 }
 987         }
 988
 989         if (err) {
 990                 dev_err(dev,
 991                         "Inconsistent trip points, not switching to automatic mode\n");
 992                 dev_err(dev, "Adjust the trip points and try again\n");
 993         }
 994         return err;
 995 }
 996
 997 static ssize_t set_pwm_enable(struct device *dev,
 998                 struct device_attribute *attr, const char *buf, size_t count)
 999 {
1000         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1001         int nr = sensor_attr->index;
1002
1003         struct it87_data *data = dev_get_drvdata(dev);
1004         long val;
1005
1006         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
1007                 return -EINVAL;
1008
1009         /* Check trip points before switching to automatic mode */
1010         if (val == 2) {
1011                 if (check_trip_points(dev, nr) < 0)
1012                         return -EINVAL;
1013         }
1014
1015         /* IT8603E does not have on/off mode */
1016         if (val == 0 && data->type == it8603)
1017                 return -EINVAL;
1018
1019         mutex_lock(&data->update_lock);
1020
1021         if (val == 0) {
1022                 int tmp;
1023                 /* make sure the fan is on when in on/off mode */
1024                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1025                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
1026                 /* set on/off mode */
1027                 data->fan_main_ctrl &= ~(1 << nr);
1028                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1029                                  data->fan_main_ctrl);
1030         } else {
1031                 if (val == 1)                           /* Manual mode */
1032                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
1033                                              data->pwm_temp_map[nr] :
1034                                              data->pwm_duty[nr];
1035                 else                                    /* Automatic mode */
1036                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1037                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1038
1039                 if (data->type != it8603) {
1040                         /* set SmartGuardian mode */
1041                         data->fan_main_ctrl |= (1 << nr);
1042                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1043                                          data->fan_main_ctrl);
1044                 }
1045         }
1046
1047         mutex_unlock(&data->update_lock);
1048         return count;
1049 }
1050 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1051                 const char *buf, size_t count)
1052 {
1053         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1054         int nr = sensor_attr->index;
1055
1056         struct it87_data *data = dev_get_drvdata(dev);
1057         long val;
1058
1059         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1060                 return -EINVAL;
1061
1062         mutex_lock(&data->update_lock);
1063         if (has_newer_autopwm(data)) {
1064                 /*
1065                  * If we are in automatic mode, the PWM duty cycle register
1066                  * is read-only so we can't write the value.
1067                  */
1068                 if (data->pwm_ctrl[nr] & 0x80) {
1069                         mutex_unlock(&data->update_lock);
1070                         return -EBUSY;
1071                 }
1072                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1073                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1074                                  data->pwm_duty[nr]);
1075         } else {
1076                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1077                 /*
1078                  * If we are in manual mode, write the duty cycle immediately;
1079                  * otherwise, just store it for later use.
1080                  */
1081                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1082                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1083                         it87_write_value(data, IT87_REG_PWM(nr),
1084                                          data->pwm_ctrl[nr]);
1085                 }
1086         }
1087         mutex_unlock(&data->update_lock);
1088         return count;
1089 }
1090 static ssize_t set_pwm_freq(struct device *dev,
1091                 struct device_attribute *attr, const char *buf, size_t count)
1092 {
1093         struct it87_data *data = dev_get_drvdata(dev);
1094         unsigned long val;
1095         int i;
1096
1097         if (kstrtoul(buf, 10, &val) < 0)
1098                 return -EINVAL;
1099
1100         /* Search for the nearest available frequency */
1101         for (i = 0; i < 7; i++) {
1102                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1103                         break;
1104         }
1105
1106         mutex_lock(&data->update_lock);
1107         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1108         data->fan_ctl |= i << 4;
1109         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1110         mutex_unlock(&data->update_lock);
1111
1112         return count;
1113 }
1114 static ssize_t show_pwm_temp_map(struct device *dev,
1115                 struct device_attribute *attr, char *buf)
1116 {
1117         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1118         int nr = sensor_attr->index;
1119
1120         struct it87_data *data = it87_update_device(dev);
1121         int map;
1122
1123         if (data->pwm_temp_map[nr] < 3)
1124                 map = 1 << data->pwm_temp_map[nr];
1125         else
1126                 map = 0;                        /* Should never happen */
1127         return sprintf(buf, "%d\n", map);
1128 }
1129 static ssize_t set_pwm_temp_map(struct device *dev,
1130                 struct device_attribute *attr, const char *buf, size_t count)
1131 {
1132         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1133         int nr = sensor_attr->index;
1134
1135         struct it87_data *data = dev_get_drvdata(dev);
1136         long val;
1137         u8 reg;
1138
1139         /*
1140          * This check can go away if we ever support automatic fan speed
1141          * control on newer chips.
1142          */
1143         if (!has_old_autopwm(data)) {
1144                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1145                 return -EINVAL;
1146         }
1147
1148         if (kstrtol(buf, 10, &val) < 0)
1149                 return -EINVAL;
1150
1151         switch (val) {
1152         case (1 << 0):
1153                 reg = 0x00;
1154                 break;
1155         case (1 << 1):
1156                 reg = 0x01;
1157                 break;
1158         case (1 << 2):
1159                 reg = 0x02;
1160                 break;
1161         default:
1162                 return -EINVAL;
1163         }
1164
1165         mutex_lock(&data->update_lock);
1166         data->pwm_temp_map[nr] = reg;
1167         /*
1168          * If we are in automatic mode, write the temp mapping immediately;
1169          * otherwise, just store it for later use.
1170          */
1171         if (data->pwm_ctrl[nr] & 0x80) {
1172                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1173                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1174         }
1175         mutex_unlock(&data->update_lock);
1176         return count;
1177 }
1178
1179 static ssize_t show_auto_pwm(struct device *dev,
1180                 struct device_attribute *attr, char *buf)
1181 {
1182         struct it87_data *data = it87_update_device(dev);
1183         struct sensor_device_attribute_2 *sensor_attr =
1184                         to_sensor_dev_attr_2(attr);
1185         int nr = sensor_attr->nr;
1186         int point = sensor_attr->index;
1187
1188         return sprintf(buf, "%d\n",
1189                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1190 }
1191
1192 static ssize_t set_auto_pwm(struct device *dev,
1193                 struct device_attribute *attr, const char *buf, size_t count)
1194 {
1195         struct it87_data *data = dev_get_drvdata(dev);
1196         struct sensor_device_attribute_2 *sensor_attr =
1197                         to_sensor_dev_attr_2(attr);
1198         int nr = sensor_attr->nr;
1199         int point = sensor_attr->index;
1200         long val;
1201
1202         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1203                 return -EINVAL;
1204
1205         mutex_lock(&data->update_lock);
1206         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1207         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1208                          data->auto_pwm[nr][point]);
1209         mutex_unlock(&data->update_lock);
1210         return count;
1211 }
1212
1213 static ssize_t show_auto_temp(struct device *dev,
1214                 struct device_attribute *attr, char *buf)
1215 {
1216         struct it87_data *data = it87_update_device(dev);
1217         struct sensor_device_attribute_2 *sensor_attr =
1218                         to_sensor_dev_attr_2(attr);
1219         int nr = sensor_attr->nr;
1220         int point = sensor_attr->index;
1221
1222         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1223 }
1224
1225 static ssize_t set_auto_temp(struct device *dev,
1226                 struct device_attribute *attr, const char *buf, size_t count)
1227 {
1228         struct it87_data *data = dev_get_drvdata(dev);
1229         struct sensor_device_attribute_2 *sensor_attr =
1230                         to_sensor_dev_attr_2(attr);
1231         int nr = sensor_attr->nr;
1232         int point = sensor_attr->index;
1233         long val;
1234
1235         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1236                 return -EINVAL;
1237
1238         mutex_lock(&data->update_lock);
1239         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1240         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1241                          data->auto_temp[nr][point]);
1242         mutex_unlock(&data->update_lock);
1243         return count;
1244 }
1245
1246 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1247 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1248                             0, 1);
1249 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1250                           set_fan_div, 0);
1251
1252 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1253 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1254                             1, 1);
1255 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1256                           set_fan_div, 1);
1257
1258 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1259 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1260                             2, 1);
1261 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1262                           set_fan_div, 2);
1263
1264 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1265 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1266                             3, 1);
1267
1268 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1269 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1270                             4, 1);
1271
1272 static SENSOR_DEVICE_ATTR_2(fan6_input, S_IRUGO, show_fan, NULL, 5, 0);
1273 static SENSOR_DEVICE_ATTR_2(fan6_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1274                             5, 1);
1275
1276 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1277                           show_pwm_enable, set_pwm_enable, 0);
1278 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1279 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1280 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1281                           show_pwm_temp_map, set_pwm_temp_map, 0);
1282 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1283                             show_auto_pwm, set_auto_pwm, 0, 0);
1284 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1285                             show_auto_pwm, set_auto_pwm, 0, 1);
1286 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1287                             show_auto_pwm, set_auto_pwm, 0, 2);
1288 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1289                             show_auto_pwm, NULL, 0, 3);
1290 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1291                             show_auto_temp, set_auto_temp, 0, 1);
1292 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1293                             show_auto_temp, set_auto_temp, 0, 0);
1294 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1295                             show_auto_temp, set_auto_temp, 0, 2);
1296 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1297                             show_auto_temp, set_auto_temp, 0, 3);
1298 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1299                             show_auto_temp, set_auto_temp, 0, 4);
1300
1301 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1302                           show_pwm_enable, set_pwm_enable, 1);
1303 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1304 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1305 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1306                           show_pwm_temp_map, set_pwm_temp_map, 1);
1307 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1308                             show_auto_pwm, set_auto_pwm, 1, 0);
1309 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1310                             show_auto_pwm, set_auto_pwm, 1, 1);
1311 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1312                             show_auto_pwm, set_auto_pwm, 1, 2);
1313 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1314                             show_auto_pwm, NULL, 1, 3);
1315 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1316                             show_auto_temp, set_auto_temp, 1, 1);
1317 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1318                             show_auto_temp, set_auto_temp, 1, 0);
1319 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1320                             show_auto_temp, set_auto_temp, 1, 2);
1321 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1322                             show_auto_temp, set_auto_temp, 1, 3);
1323 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1324                             show_auto_temp, set_auto_temp, 1, 4);
1325
1326 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1327                           show_pwm_enable, set_pwm_enable, 2);
1328 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1329 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1330 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1331                           show_pwm_temp_map, set_pwm_temp_map, 2);
1332 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1333                             show_auto_pwm, set_auto_pwm, 2, 0);
1334 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1335                             show_auto_pwm, set_auto_pwm, 2, 1);
1336 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1337                             show_auto_pwm, set_auto_pwm, 2, 2);
1338 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1339                             show_auto_pwm, NULL, 2, 3);
1340 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1341                             show_auto_temp, set_auto_temp, 2, 1);
1342 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1343                             show_auto_temp, set_auto_temp, 2, 0);
1344 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1345                             show_auto_temp, set_auto_temp, 2, 2);
1346 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1347                             show_auto_temp, set_auto_temp, 2, 3);
1348 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1349                             show_auto_temp, set_auto_temp, 2, 4);
1350
1351 /* Alarms */
1352 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1353                 char *buf)
1354 {
1355         struct it87_data *data = it87_update_device(dev);
1356         return sprintf(buf, "%u\n", data->alarms);
1357 }
1358 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1359
1360 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1361                 char *buf)
1362 {
1363         int bitnr = to_sensor_dev_attr(attr)->index;
1364         struct it87_data *data = it87_update_device(dev);
1365         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1366 }
1367
1368 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1369                 *attr, const char *buf, size_t count)
1370 {
1371         struct it87_data *data = dev_get_drvdata(dev);
1372         long val;
1373         int config;
1374
1375         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1376                 return -EINVAL;
1377
1378         mutex_lock(&data->update_lock);
1379         config = it87_read_value(data, IT87_REG_CONFIG);
1380         if (config < 0) {
1381                 count = config;
1382         } else {
1383                 config |= 1 << 5;
1384                 it87_write_value(data, IT87_REG_CONFIG, config);
1385                 /* Invalidate cache to force re-read */
1386                 data->valid = 0;
1387         }
1388         mutex_unlock(&data->update_lock);
1389
1390         return count;
1391 }
1392
1393 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1394 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1395 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1396 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1397 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1398 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1399 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1400 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1401 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1402 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1403 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1404 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1405 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1406 static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 7);
1407 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1408 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1409 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1410 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1411                           show_alarm, clear_intrusion, 4);
1412
1413 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1414                 char *buf)
1415 {
1416         int bitnr = to_sensor_dev_attr(attr)->index;
1417         struct it87_data *data = it87_update_device(dev);
1418         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1419 }
1420 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1421                 const char *buf, size_t count)
1422 {
1423         int bitnr = to_sensor_dev_attr(attr)->index;
1424         struct it87_data *data = dev_get_drvdata(dev);
1425         long val;
1426
1427         if (kstrtol(buf, 10, &val) < 0
1428          || (val != 0 && val != 1))
1429                 return -EINVAL;
1430
1431         mutex_lock(&data->update_lock);
1432         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1433         if (val)
1434                 data->beeps |= (1 << bitnr);
1435         else
1436                 data->beeps &= ~(1 << bitnr);
1437         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1438         mutex_unlock(&data->update_lock);
1439         return count;
1440 }
1441
1442 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1443                           show_beep, set_beep, 1);
1444 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1445 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1446 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1447 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1448 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1449 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1450 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1451 /* fanX_beep writability is set later */
1452 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1453 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1454 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1455 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1456 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1457 static SENSOR_DEVICE_ATTR(fan6_beep, S_IRUGO, show_beep, set_beep, 0);
1458 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1459                           show_beep, set_beep, 2);
1460 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1461 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1462
1463 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1464                 char *buf)
1465 {
1466         struct it87_data *data = dev_get_drvdata(dev);
1467         return sprintf(buf, "%u\n", data->vrm);
1468 }
1469 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1470                 const char *buf, size_t count)
1471 {
1472         struct it87_data *data = dev_get_drvdata(dev);
1473         unsigned long val;
1474
1475         if (kstrtoul(buf, 10, &val) < 0)
1476                 return -EINVAL;
1477
1478         data->vrm = val;
1479
1480         return count;
1481 }
1482 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1483
1484 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1485                 char *buf)
1486 {
1487         struct it87_data *data = it87_update_device(dev);
1488         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1489 }
1490 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1491
1492 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1493                 char *buf)
1494 {
1495         static const char * const labels[] = {
1496                 "+5V",
1497                 "5VSB",
1498                 "Vbat",
1499         };
1500         static const char * const labels_it8721[] = {
1501                 "+3.3V",
1502                 "3VSB",
1503                 "Vbat",
1504         };
1505         struct it87_data *data = dev_get_drvdata(dev);
1506         int nr = to_sensor_dev_attr(attr)->index;
1507
1508         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1509                                                        : labels[nr]);
1510 }
1511 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1512 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1513 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1514 /* AVCC3 */
1515 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1516
1517 static ssize_t show_name(struct device *dev, struct device_attribute
1518                          *devattr, char *buf)
1519 {
1520         struct it87_data *data = dev_get_drvdata(dev);
1521         return sprintf(buf, "%s\n", data->name);
1522 }
1523 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1524
1525 static struct attribute *it87_attributes_in[10][5] = {
1526 {
1527         &sensor_dev_attr_in0_input.dev_attr.attr,
1528         &sensor_dev_attr_in0_min.dev_attr.attr,
1529         &sensor_dev_attr_in0_max.dev_attr.attr,
1530         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1531         NULL
1532 }, {
1533         &sensor_dev_attr_in1_input.dev_attr.attr,
1534         &sensor_dev_attr_in1_min.dev_attr.attr,
1535         &sensor_dev_attr_in1_max.dev_attr.attr,
1536         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1537         NULL
1538 }, {
1539         &sensor_dev_attr_in2_input.dev_attr.attr,
1540         &sensor_dev_attr_in2_min.dev_attr.attr,
1541         &sensor_dev_attr_in2_max.dev_attr.attr,
1542         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1543         NULL
1544 }, {
1545         &sensor_dev_attr_in3_input.dev_attr.attr,
1546         &sensor_dev_attr_in3_min.dev_attr.attr,
1547         &sensor_dev_attr_in3_max.dev_attr.attr,
1548         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1549         NULL
1550 }, {
1551         &sensor_dev_attr_in4_input.dev_attr.attr,
1552         &sensor_dev_attr_in4_min.dev_attr.attr,
1553         &sensor_dev_attr_in4_max.dev_attr.attr,
1554         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1555         NULL
1556 }, {
1557         &sensor_dev_attr_in5_input.dev_attr.attr,
1558         &sensor_dev_attr_in5_min.dev_attr.attr,
1559         &sensor_dev_attr_in5_max.dev_attr.attr,
1560         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1561         NULL
1562 }, {
1563         &sensor_dev_attr_in6_input.dev_attr.attr,
1564         &sensor_dev_attr_in6_min.dev_attr.attr,
1565         &sensor_dev_attr_in6_max.dev_attr.attr,
1566         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1567         NULL
1568 }, {
1569         &sensor_dev_attr_in7_input.dev_attr.attr,
1570         &sensor_dev_attr_in7_min.dev_attr.attr,
1571         &sensor_dev_attr_in7_max.dev_attr.attr,
1572         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1573         NULL
1574 }, {
1575         &sensor_dev_attr_in8_input.dev_attr.attr,
1576         NULL
1577 }, {
1578         &sensor_dev_attr_in9_input.dev_attr.attr,
1579         NULL
1580 } };
1581
1582 static const struct attribute_group it87_group_in[10] = {
1583         { .attrs = it87_attributes_in[0] },
1584         { .attrs = it87_attributes_in[1] },
1585         { .attrs = it87_attributes_in[2] },
1586         { .attrs = it87_attributes_in[3] },
1587         { .attrs = it87_attributes_in[4] },
1588         { .attrs = it87_attributes_in[5] },
1589         { .attrs = it87_attributes_in[6] },
1590         { .attrs = it87_attributes_in[7] },
1591         { .attrs = it87_attributes_in[8] },
1592         { .attrs = it87_attributes_in[9] },
1593 };
1594
1595 static struct attribute *it87_attributes_temp[3][6] = {
1596 {
1597         &sensor_dev_attr_temp1_input.dev_attr.attr,
1598         &sensor_dev_attr_temp1_max.dev_attr.attr,
1599         &sensor_dev_attr_temp1_min.dev_attr.attr,
1600         &sensor_dev_attr_temp1_type.dev_attr.attr,
1601         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1602         NULL
1603 } , {
1604         &sensor_dev_attr_temp2_input.dev_attr.attr,
1605         &sensor_dev_attr_temp2_max.dev_attr.attr,
1606         &sensor_dev_attr_temp2_min.dev_attr.attr,
1607         &sensor_dev_attr_temp2_type.dev_attr.attr,
1608         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1609         NULL
1610 } , {
1611         &sensor_dev_attr_temp3_input.dev_attr.attr,
1612         &sensor_dev_attr_temp3_max.dev_attr.attr,
1613         &sensor_dev_attr_temp3_min.dev_attr.attr,
1614         &sensor_dev_attr_temp3_type.dev_attr.attr,
1615         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1616         NULL
1617 } };
1618
1619 static const struct attribute_group it87_group_temp[3] = {
1620         { .attrs = it87_attributes_temp[0] },
1621         { .attrs = it87_attributes_temp[1] },
1622         { .attrs = it87_attributes_temp[2] },
1623 };
1624
1625 static struct attribute *it87_attributes_temp_offset[] = {
1626         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1627         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1628         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1629 };
1630
1631 static struct attribute *it87_attributes[] = {
1632         &dev_attr_alarms.attr,
1633         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1634         &dev_attr_name.attr,
1635         NULL
1636 };
1637
1638 static const struct attribute_group it87_group = {
1639         .attrs = it87_attributes,
1640 };
1641
1642 static struct attribute *it87_attributes_in_beep[] = {
1643         &sensor_dev_attr_in0_beep.dev_attr.attr,
1644         &sensor_dev_attr_in1_beep.dev_attr.attr,
1645         &sensor_dev_attr_in2_beep.dev_attr.attr,
1646         &sensor_dev_attr_in3_beep.dev_attr.attr,
1647         &sensor_dev_attr_in4_beep.dev_attr.attr,
1648         &sensor_dev_attr_in5_beep.dev_attr.attr,
1649         &sensor_dev_attr_in6_beep.dev_attr.attr,
1650         &sensor_dev_attr_in7_beep.dev_attr.attr,
1651         NULL,
1652         NULL,
1653 };
1654
1655 static struct attribute *it87_attributes_temp_beep[] = {
1656         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1657         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1658         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1659 };
1660
1661 static struct attribute *it87_attributes_fan[6][3+1] = { {
1662         &sensor_dev_attr_fan1_input.dev_attr.attr,
1663         &sensor_dev_attr_fan1_min.dev_attr.attr,
1664         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1665         NULL
1666 }, {
1667         &sensor_dev_attr_fan2_input.dev_attr.attr,
1668         &sensor_dev_attr_fan2_min.dev_attr.attr,
1669         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1670         NULL
1671 }, {
1672         &sensor_dev_attr_fan3_input.dev_attr.attr,
1673         &sensor_dev_attr_fan3_min.dev_attr.attr,
1674         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1675         NULL
1676 }, {
1677         &sensor_dev_attr_fan4_input.dev_attr.attr,
1678         &sensor_dev_attr_fan4_min.dev_attr.attr,
1679         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1680         NULL
1681 }, {
1682         &sensor_dev_attr_fan5_input.dev_attr.attr,
1683         &sensor_dev_attr_fan5_min.dev_attr.attr,
1684         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1685         NULL
1686 }, {
1687         &sensor_dev_attr_fan6_input.dev_attr.attr,
1688         &sensor_dev_attr_fan6_min.dev_attr.attr,
1689         &sensor_dev_attr_fan6_alarm.dev_attr.attr,
1690         NULL
1691 } };
1692
1693 static const struct attribute_group it87_group_fan[6] = {
1694         { .attrs = it87_attributes_fan[0] },
1695         { .attrs = it87_attributes_fan[1] },
1696         { .attrs = it87_attributes_fan[2] },
1697         { .attrs = it87_attributes_fan[3] },
1698         { .attrs = it87_attributes_fan[4] },
1699         { .attrs = it87_attributes_fan[5] },
1700 };
1701
1702 static const struct attribute *it87_attributes_fan_div[] = {
1703         &sensor_dev_attr_fan1_div.dev_attr.attr,
1704         &sensor_dev_attr_fan2_div.dev_attr.attr,
1705         &sensor_dev_attr_fan3_div.dev_attr.attr,
1706 };
1707
1708 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1709         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1710         &sensor_dev_attr_pwm1.dev_attr.attr,
1711         &dev_attr_pwm1_freq.attr,
1712         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1713         NULL
1714 }, {
1715         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1716         &sensor_dev_attr_pwm2.dev_attr.attr,
1717         &dev_attr_pwm2_freq.attr,
1718         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1719         NULL
1720 }, {
1721         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1722         &sensor_dev_attr_pwm3.dev_attr.attr,
1723         &dev_attr_pwm3_freq.attr,
1724         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1725         NULL
1726 } };
1727
1728 static const struct attribute_group it87_group_pwm[3] = {
1729         { .attrs = it87_attributes_pwm[0] },
1730         { .attrs = it87_attributes_pwm[1] },
1731         { .attrs = it87_attributes_pwm[2] },
1732 };
1733
1734 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1735         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1736         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1737         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1738         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1739         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1740         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1741         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1742         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1743         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1744         NULL
1745 }, {
1746         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1747         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1748         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1749         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1750         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1751         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1752         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1753         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1754         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1755         NULL
1756 }, {
1757         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1758         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1759         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1760         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1761         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1762         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1763         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1764         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1765         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1766         NULL
1767 } };
1768
1769 static const struct attribute_group it87_group_autopwm[3] = {
1770         { .attrs = it87_attributes_autopwm[0] },
1771         { .attrs = it87_attributes_autopwm[1] },
1772         { .attrs = it87_attributes_autopwm[2] },
1773 };
1774
1775 static struct attribute *it87_attributes_fan_beep[] = {
1776         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1777         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1778         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1779         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1780         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1781         &sensor_dev_attr_fan6_beep.dev_attr.attr,
1782 };
1783
1784 static struct attribute *it87_attributes_vid[] = {
1785         &dev_attr_vrm.attr,
1786         &dev_attr_cpu0_vid.attr,
1787         NULL
1788 };
1789
1790 static const struct attribute_group it87_group_vid = {
1791         .attrs = it87_attributes_vid,
1792 };
1793
1794 static struct attribute *it87_attributes_label[] = {
1795         &sensor_dev_attr_in3_label.dev_attr.attr,
1796         &sensor_dev_attr_in7_label.dev_attr.attr,
1797         &sensor_dev_attr_in8_label.dev_attr.attr,
1798         &sensor_dev_attr_in9_label.dev_attr.attr,
1799         NULL
1800 };
1801
1802 static const struct attribute_group it87_group_label = {
1803         .attrs = it87_attributes_label,
1804 };
1805
1806 /* SuperIO detection - will change isa_address if a chip is found */
1807 static int __init it87_find(unsigned short *address,
1808         struct it87_sio_data *sio_data)
1809 {
1810         int err;
1811         u16 chip_type;
1812         const char *board_vendor, *board_name;
1813
1814         err = superio_enter();
1815         if (err)
1816                 return err;
1817
1818         err = -ENODEV;
1819         chip_type = force_id ? force_id : superio_inw(DEVID);
1820
1821         switch (chip_type) {
1822         case IT8705F_DEVID:
1823                 sio_data->type = it87;
1824                 break;
1825         case IT8712F_DEVID:
1826                 sio_data->type = it8712;
1827                 break;
1828         case IT8716F_DEVID:
1829         case IT8726F_DEVID:
1830                 sio_data->type = it8716;
1831                 break;
1832         case IT8718F_DEVID:
1833                 sio_data->type = it8718;
1834                 break;
1835         case IT8720F_DEVID:
1836                 sio_data->type = it8720;
1837                 break;
1838         case IT8721F_DEVID:
1839                 sio_data->type = it8721;
1840                 break;
1841         case IT8728F_DEVID:
1842                 sio_data->type = it8728;
1843                 break;
1844         case IT8771E_DEVID:
1845                 sio_data->type = it8771;
1846                 break;
1847         case IT8772E_DEVID:
1848                 sio_data->type = it8772;
1849                 break;
1850         case IT8781F_DEVID:
1851                 sio_data->type = it8781;
1852                 break;
1853         case IT8782F_DEVID:
1854                 sio_data->type = it8782;
1855                 break;
1856         case IT8783E_DEVID:
1857                 sio_data->type = it8783;
1858                 break;
1859         case IT8786E_DEVID:
1860                 sio_data->type = it8786;
1861                 break;
1862         case IT8603E_DEVID:
1863         case IT8623E_DEVID:
1864                 sio_data->type = it8603;
1865                 break;
1866         case IT8620E_DEVID:
1867                 sio_data->type = it8620;
1868                 break;
1869         case IT8790E_DEVID:
1870                 sio_data->type = it8790;
1871                 break;
1872         case 0xffff:    /* No device at all */
1873                 goto exit;
1874         default:
1875                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1876                 goto exit;
1877         }
1878
1879         superio_select(PME);
1880         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1881                 pr_info("Device not activated, skipping\n");
1882                 goto exit;
1883         }
1884
1885         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1886         if (*address == 0) {
1887                 pr_info("Base address not set, skipping\n");
1888                 goto exit;
1889         }
1890
1891         err = 0;
1892         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1893         pr_info("Found IT%04x%s chip at 0x%x, revision %d\n", chip_type,
1894                 it87_devices[sio_data->type].suffix,
1895                 *address, sio_data->revision);
1896
1897         /* in8 (Vbat) is always internal */
1898         sio_data->internal = (1 << 2);
1899
1900         /* in7 (VSB or VCCH5V) is always internal on some chips */
1901         if (it87_devices[sio_data->type].features & FEAT_IN7_INTERNAL)
1902                 sio_data->internal |= (1 << 1);
1903
1904         /* in9 (AVCC3), always internal if supported */
1905         if (it87_devices[sio_data->type].features & FEAT_AVCC3)
1906                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
1907         else
1908                 sio_data->skip_in |= (1 << 9);
1909
1910         if (!(it87_devices[sio_data->type].features & FEAT_VID))
1911                 sio_data->skip_vid = 1;
1912
1913         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1914         if (sio_data->type == it87) {
1915                 /* The IT8705F has a different LD number for GPIO */
1916                 superio_select(5);
1917                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1918         } else if (sio_data->type == it8783) {
1919                 int reg25, reg27, reg2a, reg2c, regef;
1920
1921                 superio_select(GPIO);
1922
1923                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1924                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1925                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1926                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1927                 regef = superio_inb(IT87_SIO_SPI_REG);
1928
1929                 /* Check if fan3 is there or not */
1930                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1931                         sio_data->skip_fan |= (1 << 2);
1932                 if ((reg25 & (1 << 4))
1933                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1934                         sio_data->skip_pwm |= (1 << 2);
1935
1936                 /* Check if fan2 is there or not */
1937                 if (reg27 & (1 << 7))
1938                         sio_data->skip_fan |= (1 << 1);
1939                 if (reg27 & (1 << 3))
1940                         sio_data->skip_pwm |= (1 << 1);
1941
1942                 /* VIN5 */
1943                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1944                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1945
1946                 /* VIN6 */
1947                 if (reg27 & (1 << 1))
1948                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1949
1950                 /*
1951                  * VIN7
1952                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1953                  */
1954                 if (reg27 & (1 << 2)) {
1955                         /*
1956                          * The data sheet is a bit unclear regarding the
1957                          * internal voltage divider for VCCH5V. It says
1958                          * "This bit enables and switches VIN7 (pin 91) to the
1959                          * internal voltage divider for VCCH5V".
1960                          * This is different to other chips, where the internal
1961                          * voltage divider would connect VIN7 to an internal
1962                          * voltage source. Maybe that is the case here as well.
1963                          *
1964                          * Since we don't know for sure, re-route it if that is
1965                          * not the case, and ask the user to report if the
1966                          * resulting voltage is sane.
1967                          */
1968                         if (!(reg2c & (1 << 1))) {
1969                                 reg2c |= (1 << 1);
1970                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
1971                                 pr_notice("Routing internal VCCH5V to in7.\n");
1972                         }
1973                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1974                         pr_notice("Please report if it displays a reasonable voltage.\n");
1975                 }
1976
1977                 if (reg2c & (1 << 0))
1978                         sio_data->internal |= (1 << 0);
1979                 if (reg2c & (1 << 1))
1980                         sio_data->internal |= (1 << 1);
1981
1982                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1983         } else if (sio_data->type == it8603) {
1984                 int reg27, reg29;
1985
1986                 superio_select(GPIO);
1987
1988                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1989
1990                 /* Check if fan3 is there or not */
1991                 if (reg27 & (1 << 6))
1992                         sio_data->skip_pwm |= (1 << 2);
1993                 if (reg27 & (1 << 7))
1994                         sio_data->skip_fan |= (1 << 2);
1995
1996                 /* Check if fan2 is there or not */
1997                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
1998                 if (reg29 & (1 << 1))
1999                         sio_data->skip_pwm |= (1 << 1);
2000                 if (reg29 & (1 << 2))
2001                         sio_data->skip_fan |= (1 << 1);
2002
2003                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
2004                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
2005
2006                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2007         } else {
2008                 int reg;
2009                 bool uart6;
2010
2011                 superio_select(GPIO);
2012
2013                 reg = superio_inb(IT87_SIO_GPIO3_REG);
2014                 if (!sio_data->skip_vid) {
2015                         /* We need at least 4 VID pins */
2016                         if (reg & 0x0f) {
2017                                 pr_info("VID is disabled (pins used for GPIO)\n");
2018                                 sio_data->skip_vid = 1;
2019                         }
2020                 }
2021
2022                 /* Check if fan3 is there or not */
2023                 if (reg & (1 << 6))
2024                         sio_data->skip_pwm |= (1 << 2);
2025                 if (reg & (1 << 7))
2026                         sio_data->skip_fan |= (1 << 2);
2027
2028                 /* Check if fan2 is there or not */
2029                 reg = superio_inb(IT87_SIO_GPIO5_REG);
2030                 if (reg & (1 << 1))
2031                         sio_data->skip_pwm |= (1 << 1);
2032                 if (reg & (1 << 2))
2033                         sio_data->skip_fan |= (1 << 1);
2034
2035                 if ((sio_data->type == it8718 || sio_data->type == it8720)
2036                  && !(sio_data->skip_vid))
2037                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
2038
2039                 reg = superio_inb(IT87_SIO_PINX2_REG);
2040
2041                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
2042
2043                 /*
2044                  * The IT8720F has no VIN7 pin, so VCCH should always be
2045                  * routed internally to VIN7 with an internal divider.
2046                  * Curiously, there still is a configuration bit to control
2047                  * this, which means it can be set incorrectly. And even
2048                  * more curiously, many boards out there are improperly
2049                  * configured, even though the IT8720F datasheet claims
2050                  * that the internal routing of VCCH to VIN7 is the default
2051                  * setting. So we force the internal routing in this case.
2052                  *
2053                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
2054                  * If UART6 is enabled, re-route VIN7 to the internal divider
2055                  * if that is not already the case.
2056                  */
2057                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
2058                         reg |= (1 << 1);
2059                         superio_outb(IT87_SIO_PINX2_REG, reg);
2060                         pr_notice("Routing internal VCCH to in7\n");
2061                 }
2062                 if (reg & (1 << 0))
2063                         sio_data->internal |= (1 << 0);
2064                 if (reg & (1 << 1))
2065                         sio_data->internal |= (1 << 1);
2066
2067                 /*
2068                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
2069                  * While VIN7 can be routed to the internal voltage divider,
2070                  * VIN5 and VIN6 are not available if UART6 is enabled.
2071                  *
2072                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
2073                  * is the temperature source. Since we can not read the
2074                  * temperature source here, skip_temp is preliminary.
2075                  */
2076                 if (uart6) {
2077                         sio_data->skip_in |= (1 << 5) | (1 << 6);
2078                         sio_data->skip_temp |= (1 << 2);
2079                 }
2080
2081                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2082         }
2083         if (sio_data->beep_pin)
2084                 pr_info("Beeping is supported\n");
2085
2086         /* Disable specific features based on DMI strings */
2087         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2088         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2089         if (board_vendor && board_name) {
2090                 if (strcmp(board_vendor, "nVIDIA") == 0
2091                  && strcmp(board_name, "FN68PT") == 0) {
2092                         /*
2093                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2094                          * connected to a fan, but to something else. One user
2095                          * has reported instant system power-off when changing
2096                          * the PWM2 duty cycle, so we disable it.
2097                          * I use the board name string as the trigger in case
2098                          * the same board is ever used in other systems.
2099                          */
2100                         pr_info("Disabling pwm2 due to hardware constraints\n");
2101                         sio_data->skip_pwm = (1 << 1);
2102                 }
2103         }
2104
2105 exit:
2106         superio_exit();
2107         return err;
2108 }
2109
2110 static void it87_remove_files(struct device *dev)
2111 {
2112         struct it87_data *data = platform_get_drvdata(pdev);
2113         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2114         int i;
2115
2116         sysfs_remove_group(&dev->kobj, &it87_group);
2117         for (i = 0; i < 10; i++) {
2118                 if (sio_data->skip_in & (1 << i))
2119                         continue;
2120                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2121                 if (it87_attributes_in_beep[i])
2122                         sysfs_remove_file(&dev->kobj,
2123                                           it87_attributes_in_beep[i]);
2124         }
2125         for (i = 0; i < 3; i++) {
2126                 if (!(data->has_temp & (1 << i)))
2127                         continue;
2128                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2129                 if (has_temp_offset(data))
2130                         sysfs_remove_file(&dev->kobj,
2131                                           it87_attributes_temp_offset[i]);
2132                 if (sio_data->beep_pin)
2133                         sysfs_remove_file(&dev->kobj,
2134                                           it87_attributes_temp_beep[i]);
2135         }
2136         for (i = 0; i < 6; i++) {
2137                 if (!(data->has_fan & (1 << i)))
2138                         continue;
2139                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2140                 if (sio_data->beep_pin)
2141                         sysfs_remove_file(&dev->kobj,
2142                                           it87_attributes_fan_beep[i]);
2143                 if (i < 3 && !has_16bit_fans(data))
2144                         sysfs_remove_file(&dev->kobj,
2145                                           it87_attributes_fan_div[i]);
2146         }
2147         for (i = 0; i < 3; i++) {
2148                 if (sio_data->skip_pwm & (1 << 0))
2149                         continue;
2150                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2151                 if (has_old_autopwm(data))
2152                         sysfs_remove_group(&dev->kobj,
2153                                            &it87_group_autopwm[i]);
2154         }
2155         if (!sio_data->skip_vid)
2156                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2157         sysfs_remove_group(&dev->kobj, &it87_group_label);
2158 }
2159
2160 static int it87_probe(struct platform_device *pdev)
2161 {
2162         struct it87_data *data;
2163         struct resource *res;
2164         struct device *dev = &pdev->dev;
2165         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2166         int err = 0, i;
2167         int enable_pwm_interface;
2168         int fan_beep_need_rw;
2169
2170         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2171         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2172                                  DRVNAME)) {
2173                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2174                         (unsigned long)res->start,
2175                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2176                 return -EBUSY;
2177         }
2178
2179         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2180         if (!data)
2181                 return -ENOMEM;
2182
2183         data->addr = res->start;
2184         data->type = sio_data->type;
2185         data->features = it87_devices[sio_data->type].features;
2186         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2187         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2188         data->name = it87_devices[sio_data->type].name;
2189         /*
2190          * IT8705F Datasheet 0.4.1, 3h == Version G.
2191          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2192          * These are the first revisions with 16-bit tachometer support.
2193          */
2194         switch (data->type) {
2195         case it87:
2196                 if (sio_data->revision >= 0x03) {
2197                         data->features &= ~FEAT_OLD_AUTOPWM;
2198                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS;
2199                 }
2200                 break;
2201         case it8712:
2202                 if (sio_data->revision >= 0x08) {
2203                         data->features &= ~FEAT_OLD_AUTOPWM;
2204                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS |
2205                                           FEAT_FIVE_FANS;
2206                 }
2207                 break;
2208         default:
2209                 break;
2210         }
2211
2212         /* Now, we do the remaining detection. */
2213         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2214          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2215                 return -ENODEV;
2216
2217         platform_set_drvdata(pdev, data);
2218
2219         mutex_init(&data->update_lock);
2220
2221         /* Check PWM configuration */
2222         enable_pwm_interface = it87_check_pwm(dev);
2223
2224         /* Starting with IT8721F, we handle scaling of internal voltages */
2225         if (has_12mv_adc(data)) {
2226                 if (sio_data->internal & (1 << 0))
2227                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2228                 if (sio_data->internal & (1 << 1))
2229                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2230                 if (sio_data->internal & (1 << 2))
2231                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2232                 if (sio_data->internal & (1 << 3))
2233                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2234         } else if (sio_data->type == it8781 || sio_data->type == it8782 ||
2235                    sio_data->type == it8783) {
2236                 if (sio_data->internal & (1 << 0))
2237                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2238                 if (sio_data->internal & (1 << 1))
2239                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2240         }
2241
2242         data->has_temp = 0x07;
2243         if (sio_data->skip_temp & (1 << 2)) {
2244                 if (sio_data->type == it8782
2245                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2246                         data->has_temp &= ~(1 << 2);
2247         }
2248
2249         /* Initialize the IT87 chip */
2250         it87_init_device(pdev);
2251
2252         /* Register sysfs hooks */
2253         err = sysfs_create_group(&dev->kobj, &it87_group);
2254         if (err)
2255                 return err;
2256
2257         for (i = 0; i < 10; i++) {
2258                 if (sio_data->skip_in & (1 << i))
2259                         continue;
2260                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2261                 if (err)
2262                         goto error;
2263                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2264                         err = sysfs_create_file(&dev->kobj,
2265                                                 it87_attributes_in_beep[i]);
2266                         if (err)
2267                                 goto error;
2268                 }
2269         }
2270
2271         for (i = 0; i < 3; i++) {
2272                 if (!(data->has_temp & (1 << i)))
2273                         continue;
2274                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2275                 if (err)
2276                         goto error;
2277                 if (has_temp_offset(data)) {
2278                         err = sysfs_create_file(&dev->kobj,
2279                                                 it87_attributes_temp_offset[i]);
2280                         if (err)
2281                                 goto error;
2282                 }
2283                 if (sio_data->beep_pin) {
2284                         err = sysfs_create_file(&dev->kobj,
2285                                                 it87_attributes_temp_beep[i]);
2286                         if (err)
2287                                 goto error;
2288                 }
2289         }
2290
2291         /* Do not create fan files for disabled fans */
2292         fan_beep_need_rw = 1;
2293         for (i = 0; i < 6; i++) {
2294                 if (!(data->has_fan & (1 << i)))
2295                         continue;
2296                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2297                 if (err)
2298                         goto error;
2299
2300                 if (i < 3 && !has_16bit_fans(data)) {
2301                         err = sysfs_create_file(&dev->kobj,
2302                                                 it87_attributes_fan_div[i]);
2303                         if (err)
2304                                 goto error;
2305                 }
2306
2307                 if (sio_data->beep_pin) {
2308                         err = sysfs_create_file(&dev->kobj,
2309                                                 it87_attributes_fan_beep[i]);
2310                         if (err)
2311                                 goto error;
2312                         if (!fan_beep_need_rw)
2313                                 continue;
2314
2315                         /*
2316                          * As we have a single beep enable bit for all fans,
2317                          * only the first enabled fan has a writable attribute
2318                          * for it.
2319                          */
2320                         if (sysfs_chmod_file(&dev->kobj,
2321                                              it87_attributes_fan_beep[i],
2322                                              S_IRUGO | S_IWUSR))
2323                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2324                                         i + 1);
2325                         fan_beep_need_rw = 0;
2326                 }
2327         }
2328
2329         if (enable_pwm_interface) {
2330                 for (i = 0; i < 3; i++) {
2331                         if (sio_data->skip_pwm & (1 << i))
2332                                 continue;
2333                         err = sysfs_create_group(&dev->kobj,
2334                                                  &it87_group_pwm[i]);
2335                         if (err)
2336                                 goto error;
2337
2338                         if (!has_old_autopwm(data))
2339                                 continue;
2340                         err = sysfs_create_group(&dev->kobj,
2341                                                  &it87_group_autopwm[i]);
2342                         if (err)
2343                                 goto error;
2344                 }
2345         }
2346
2347         if (!sio_data->skip_vid) {
2348                 data->vrm = vid_which_vrm();
2349                 /* VID reading from Super-I/O config space if available */
2350                 data->vid = sio_data->vid_value;
2351                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2352                 if (err)
2353                         goto error;
2354         }
2355
2356         /* Export labels for internal sensors */
2357         for (i = 0; i < 4; i++) {
2358                 if (!(sio_data->internal & (1 << i)))
2359                         continue;
2360                 err = sysfs_create_file(&dev->kobj,
2361                                         it87_attributes_label[i]);
2362                 if (err)
2363                         goto error;
2364         }
2365
2366         data->hwmon_dev = hwmon_device_register(dev);
2367         if (IS_ERR(data->hwmon_dev)) {
2368                 err = PTR_ERR(data->hwmon_dev);
2369                 goto error;
2370         }
2371
2372         return 0;
2373
2374 error:
2375         it87_remove_files(dev);
2376         return err;
2377 }
2378
2379 static int it87_remove(struct platform_device *pdev)
2380 {
2381         struct it87_data *data = platform_get_drvdata(pdev);
2382
2383         hwmon_device_unregister(data->hwmon_dev);
2384         it87_remove_files(&pdev->dev);
2385
2386         return 0;
2387 }
2388
2389 /*
2390  * Must be called with data->update_lock held, except during initialization.
2391  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2392  * would slow down the IT87 access and should not be necessary.
2393  */
2394 static int it87_read_value(struct it87_data *data, u8 reg)
2395 {
2396         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2397         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2398 }
2399
2400 /*
2401  * Must be called with data->update_lock held, except during initialization.
2402  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2403  * would slow down the IT87 access and should not be necessary.
2404  */
2405 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2406 {
2407         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2408         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2409 }
2410
2411 /* Return 1 if and only if the PWM interface is safe to use */
2412 static int it87_check_pwm(struct device *dev)
2413 {
2414         struct it87_data *data = dev_get_drvdata(dev);
2415         /*
2416          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2417          * and polarity set to active low is sign that this is the case so we
2418          * disable pwm control to protect the user.
2419          */
2420         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2421         if ((tmp & 0x87) == 0) {
2422                 if (fix_pwm_polarity) {
2423                         /*
2424                          * The user asks us to attempt a chip reconfiguration.
2425                          * This means switching to active high polarity and
2426                          * inverting all fan speed values.
2427                          */
2428                         int i;
2429                         u8 pwm[3];
2430
2431                         for (i = 0; i < 3; i++)
2432                                 pwm[i] = it87_read_value(data,
2433                                                          IT87_REG_PWM(i));
2434
2435                         /*
2436                          * If any fan is in automatic pwm mode, the polarity
2437                          * might be correct, as suspicious as it seems, so we
2438                          * better don't change anything (but still disable the
2439                          * PWM interface).
2440                          */
2441                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2442                                 dev_info(dev,
2443                                          "Reconfiguring PWM to active high polarity\n");
2444                                 it87_write_value(data, IT87_REG_FAN_CTL,
2445                                                  tmp | 0x87);
2446                                 for (i = 0; i < 3; i++)
2447                                         it87_write_value(data,
2448                                                          IT87_REG_PWM(i),
2449                                                          0x7f & ~pwm[i]);
2450                                 return 1;
2451                         }
2452
2453                         dev_info(dev,
2454                                  "PWM configuration is too broken to be fixed\n");
2455                 }
2456
2457                 dev_info(dev,
2458                          "Detected broken BIOS defaults, disabling PWM interface\n");
2459                 return 0;
2460         } else if (fix_pwm_polarity) {
2461                 dev_info(dev,
2462                          "PWM configuration looks sane, won't touch\n");
2463         }
2464
2465         return 1;
2466 }
2467
2468 /* Called when we have found a new IT87. */
2469 static void it87_init_device(struct platform_device *pdev)
2470 {
2471         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2472         struct it87_data *data = platform_get_drvdata(pdev);
2473         int tmp, i;
2474         u8 mask;
2475
2476         /*
2477          * For each PWM channel:
2478          * - If it is in automatic mode, setting to manual mode should set
2479          *   the fan to full speed by default.
2480          * - If it is in manual mode, we need a mapping to temperature
2481          *   channels to use when later setting to automatic mode later.
2482          *   Use a 1:1 mapping by default (we are clueless.)
2483          * In both cases, the value can (and should) be changed by the user
2484          * prior to switching to a different mode.
2485          * Note that this is no longer needed for the IT8721F and later, as
2486          * these have separate registers for the temperature mapping and the
2487          * manual duty cycle.
2488          */
2489         for (i = 0; i < 3; i++) {
2490                 data->pwm_temp_map[i] = i;
2491                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2492                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2493         }
2494
2495         /*
2496          * Some chips seem to have default value 0xff for all limit
2497          * registers. For low voltage limits it makes no sense and triggers
2498          * alarms, so change to 0 instead. For high temperature limits, it
2499          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2500          * but is still confusing, so change to 127 degrees C.
2501          */
2502         for (i = 0; i < 8; i++) {
2503                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2504                 if (tmp == 0xff)
2505                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2506         }
2507         for (i = 0; i < 3; i++) {
2508                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2509                 if (tmp == 0xff)
2510                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2511         }
2512
2513         /*
2514          * Temperature channels are not forcibly enabled, as they can be
2515          * set to two different sensor types and we can't guess which one
2516          * is correct for a given system. These channels can be enabled at
2517          * run-time through the temp{1-3}_type sysfs accessors if needed.
2518          */
2519
2520         /* Check if voltage monitors are reset manually or by some reason */
2521         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2522         if ((tmp & 0xff) == 0) {
2523                 /* Enable all voltage monitors */
2524                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2525         }
2526
2527         /* Check if tachometers are reset manually or by some reason */
2528         mask = 0x70 & ~(sio_data->skip_fan << 4);
2529         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2530         if ((data->fan_main_ctrl & mask) == 0) {
2531                 /* Enable all fan tachometers */
2532                 data->fan_main_ctrl |= mask;
2533                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2534                                  data->fan_main_ctrl);
2535         }
2536         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2537
2538         tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2539
2540         /* Set tachometers to 16-bit mode if needed */
2541         if (has_fan16_config(data)) {
2542                 if (~tmp & 0x07 & data->has_fan) {
2543                         dev_dbg(&pdev->dev,
2544                                 "Setting fan1-3 to 16-bit mode\n");
2545                         it87_write_value(data, IT87_REG_FAN_16BIT,
2546                                          tmp | 0x07);
2547                 }
2548         }
2549
2550         /* Check for additional fans */
2551         if (has_five_fans(data)) {
2552                 if (tmp & (1 << 4))
2553                         data->has_fan |= (1 << 3); /* fan4 enabled */
2554                 if (tmp & (1 << 5))
2555                         data->has_fan |= (1 << 4); /* fan5 enabled */
2556         }
2557
2558         if (has_six_fans(data)) {
2559                 if (tmp & (1 << 2))
2560                         data->has_fan |= (1 << 5); /* fan6 enabled */
2561         }
2562
2563         /* Fan input pins may be used for alternative functions */
2564         data->has_fan &= ~sio_data->skip_fan;
2565
2566         /* Start monitoring */
2567         it87_write_value(data, IT87_REG_CONFIG,
2568                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2569                          | (update_vbat ? 0x41 : 0x01));
2570 }
2571
2572 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2573 {
2574         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2575         if (has_newer_autopwm(data)) {
2576                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2577                 data->pwm_duty[nr] = it87_read_value(data,
2578                                                      IT87_REG_PWM_DUTY(nr));
2579         } else {
2580                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2581                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2582                 else                            /* Manual mode */
2583                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2584         }
2585
2586         if (has_old_autopwm(data)) {
2587                 int i;
2588
2589                 for (i = 0; i < 5 ; i++)
2590                         data->auto_temp[nr][i] = it87_read_value(data,
2591                                                 IT87_REG_AUTO_TEMP(nr, i));
2592                 for (i = 0; i < 3 ; i++)
2593                         data->auto_pwm[nr][i] = it87_read_value(data,
2594                                                 IT87_REG_AUTO_PWM(nr, i));
2595         }
2596 }
2597
2598 static struct it87_data *it87_update_device(struct device *dev)
2599 {
2600         struct it87_data *data = dev_get_drvdata(dev);
2601         int i;
2602
2603         mutex_lock(&data->update_lock);
2604
2605         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2606             || !data->valid) {
2607                 if (update_vbat) {
2608                         /*
2609                          * Cleared after each update, so reenable.  Value
2610                          * returned by this read will be previous value
2611                          */
2612                         it87_write_value(data, IT87_REG_CONFIG,
2613                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2614                 }
2615                 for (i = 0; i <= 7; i++) {
2616                         data->in[i][0] =
2617                                 it87_read_value(data, IT87_REG_VIN(i));
2618                         data->in[i][1] =
2619                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2620                         data->in[i][2] =
2621                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2622                 }
2623                 /* in8 (battery) has no limit registers */
2624                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2625                 if (has_avcc3(data))
2626                         data->in[9][0] = it87_read_value(data, IT87_REG_AVCC3);
2627
2628                 for (i = 0; i < 6; i++) {
2629                         /* Skip disabled fans */
2630                         if (!(data->has_fan & (1 << i)))
2631                                 continue;
2632
2633                         data->fan[i][1] =
2634                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2635                         data->fan[i][0] = it87_read_value(data,
2636                                        IT87_REG_FAN[i]);
2637                         /* Add high byte if in 16-bit mode */
2638                         if (has_16bit_fans(data)) {
2639                                 data->fan[i][0] |= it87_read_value(data,
2640                                                 IT87_REG_FANX[i]) << 8;
2641                                 data->fan[i][1] |= it87_read_value(data,
2642                                                 IT87_REG_FANX_MIN[i]) << 8;
2643                         }
2644                 }
2645                 for (i = 0; i < 3; i++) {
2646                         if (!(data->has_temp & (1 << i)))
2647                                 continue;
2648                         data->temp[i][0] =
2649                                 it87_read_value(data, IT87_REG_TEMP(i));
2650                         data->temp[i][1] =
2651                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2652                         data->temp[i][2] =
2653                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2654                         if (has_temp_offset(data))
2655                                 data->temp[i][3] =
2656                                   it87_read_value(data,
2657                                                   IT87_REG_TEMP_OFFSET[i]);
2658                 }
2659
2660                 /* Newer chips don't have clock dividers */
2661                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2662                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2663                         data->fan_div[0] = i & 0x07;
2664                         data->fan_div[1] = (i >> 3) & 0x07;
2665                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2666                 }
2667
2668                 data->alarms =
2669                         it87_read_value(data, IT87_REG_ALARM1) |
2670                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2671                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2672                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2673
2674                 data->fan_main_ctrl = it87_read_value(data,
2675                                 IT87_REG_FAN_MAIN_CTRL);
2676                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2677                 for (i = 0; i < 3; i++)
2678                         it87_update_pwm_ctrl(data, i);
2679
2680                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2681                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2682                 /*
2683                  * The IT8705F does not have VID capability.
2684                  * The IT8718F and later don't use IT87_REG_VID for the
2685                  * same purpose.
2686                  */
2687                 if (data->type == it8712 || data->type == it8716) {
2688                         data->vid = it87_read_value(data, IT87_REG_VID);
2689                         /*
2690                          * The older IT8712F revisions had only 5 VID pins,
2691                          * but we assume it is always safe to read 6 bits.
2692                          */
2693                         data->vid &= 0x3f;
2694                 }
2695                 data->last_updated = jiffies;
2696                 data->valid = 1;
2697         }
2698
2699         mutex_unlock(&data->update_lock);
2700
2701         return data;
2702 }
2703
2704 static int __init it87_device_add(unsigned short address,
2705                                   const struct it87_sio_data *sio_data)
2706 {
2707         struct resource res = {
2708                 .start  = address + IT87_EC_OFFSET,
2709                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2710                 .name   = DRVNAME,
2711                 .flags  = IORESOURCE_IO,
2712         };
2713         int err;
2714
2715         err = acpi_check_resource_conflict(&res);
2716         if (err)
2717                 goto exit;
2718
2719         pdev = platform_device_alloc(DRVNAME, address);
2720         if (!pdev) {
2721                 err = -ENOMEM;
2722                 pr_err("Device allocation failed\n");
2723                 goto exit;
2724         }
2725
2726         err = platform_device_add_resources(pdev, &res, 1);
2727         if (err) {
2728                 pr_err("Device resource addition failed (%d)\n", err);
2729                 goto exit_device_put;
2730         }
2731
2732         err = platform_device_add_data(pdev, sio_data,
2733                                        sizeof(struct it87_sio_data));
2734         if (err) {
2735                 pr_err("Platform data allocation failed\n");
2736                 goto exit_device_put;
2737         }
2738
2739         err = platform_device_add(pdev);
2740         if (err) {
2741                 pr_err("Device addition failed (%d)\n", err);
2742                 goto exit_device_put;
2743         }
2744
2745         return 0;
2746
2747 exit_device_put:
2748         platform_device_put(pdev);
2749 exit:
2750         return err;
2751 }
2752
2753 static int __init sm_it87_init(void)
2754 {
2755         int err;
2756         unsigned short isa_address = 0;
2757         struct it87_sio_data sio_data;
2758
2759         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2760         err = it87_find(&isa_address, &sio_data);
2761         if (err)
2762                 return err;
2763         err = platform_driver_register(&it87_driver);
2764         if (err)
2765                 return err;
2766
2767         err = it87_device_add(isa_address, &sio_data);
2768         if (err) {
2769                 platform_driver_unregister(&it87_driver);
2770                 return err;
2771         }
2772
2773         return 0;
2774 }
2775
2776 static void __exit sm_it87_exit(void)
2777 {
2778         platform_device_unregister(pdev);
2779         platform_driver_unregister(&it87_driver);
2780 }
2781
2782
2783 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2784 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2785 module_param(update_vbat, bool, 0);
2786 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2787 module_param(fix_pwm_polarity, bool, 0);
2788 MODULE_PARM_DESC(fix_pwm_polarity,
2789                  "Force PWM polarity to active high (DANGEROUS)");
2790 MODULE_LICENSE("GPL");
2791
2792 module_init(sm_it87_init);
2793 module_exit(sm_it87_exit);