drivers/hwmon/it87.c

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