linux/drivers/hwmon/it87.c
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   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
  66enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
  67             it8772, it8782, it8783 };
  68
  69static unsigned short force_id;
  70module_param(force_id, ushort, 0);
  71MODULE_PARM_DESC(force_id, "Override the detected device ID");
  72
  73static 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
  86static inline int superio_inb(int reg)
  87{
  88        outb(reg, REG);
  89        return inb(VAL);
  90}
  91
  92static inline void superio_outb(int reg, int val)
  93{
  94        outb(reg, REG);
  95        outb(val, VAL);
  96}
  97
  98static 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
 108static inline void superio_select(int ldn)
 109{
 110        outb(DEV, REG);
 111        outb(ldn, VAL);
 112}
 113
 114static 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
 129static 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 */
 163static bool update_vbat;
 164
 165/* Not all BIOSes properly configure the PWM registers */
 166static 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
 206static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
 207static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
 208static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
 209static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 210static 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
 235struct 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
 250static 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
 331struct 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 */
 350struct 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
 398static 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
 406static 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
 412static int in_from_reg(const struct it87_data *data, int nr, int val)
 413{
 414        return val * adc_lsb(data, nr);
 415}
 416
 417static 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
 425static 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
 442static 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
 450static 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
 459static 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
 468static 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
 479static int it87_probe(struct platform_device *pdev);
 480static int it87_remove(struct platform_device *pdev);
 481
 482static int it87_read_value(struct it87_data *data, u8 reg);
 483static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 484static struct it87_data *it87_update_device(struct device *dev);
 485static int it87_check_pwm(struct device *dev);
 486static void it87_init_device(struct platform_device *pdev);
 487
 488
 489static 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
 498static 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
 509static 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
 532static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
 533static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
 534                            0, 1);
 535static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
 536                            0, 2);
 537
 538static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
 539static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
 540                            1, 1);
 541static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
 542                            1, 2);
 543
 544static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
 545static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
 546                            2, 1);
 547static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
 548                            2, 2);
 549
 550static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
 551static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
 552                            3, 1);
 553static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
 554                            3, 2);
 555
 556static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
 557static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
 558                            4, 1);
 559static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
 560                            4, 2);
 561
 562static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
 563static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
 564                            5, 1);
 565static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
 566                            5, 2);
 567
 568static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
 569static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
 570                            6, 1);
 571static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
 572                            6, 2);
 573
 574static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
 575static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
 576                            7, 1);
 577static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
 578                            7, 2);
 579
 580static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
 581
 582/* 3 temperatures */
 583static 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
 594static 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
 634static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
 635static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 636                            0, 1);
 637static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 638                            0, 2);
 639static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
 640                            set_temp, 0, 3);
 641static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
 642static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 643                            1, 1);
 644static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 645                            1, 2);
 646static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
 647                            set_temp, 1, 3);
 648static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
 649static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 650                            2, 1);
 651static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 652                            2, 2);
 653static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
 654                            set_temp, 2, 3);
 655
 656static 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
 675static 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
 724static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
 725                          set_temp_type, 0);
 726static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
 727                          set_temp_type, 1);
 728static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
 729                          set_temp_type, 2);
 730
 731/* 3 Fans */
 732
 733static 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
 745static 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
 761static 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}
 770static 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}
 779static 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}
 789static 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
 798static 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
 843static 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 */
 890static 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
 914static 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}
 960static 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}
1000static 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}
1024static 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}
1039static 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
1089static 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
1102static 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
1123static 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
1135static 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
1156static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1157static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1158                            0, 1);
1159static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1160                          set_fan_div, 0);
1161
1162static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1163static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1164                            1, 1);
1165static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1166                          set_fan_div, 1);
1167
1168static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1169static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1170                            2, 1);
1171static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1172                          set_fan_div, 2);
1173
1174static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1175static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1176                            3, 1);
1177
1178static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1179static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1180                            4, 1);
1181
1182static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1183                          show_pwm_enable, set_pwm_enable, 0);
1184static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1185static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1186static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1187                          show_pwm_temp_map, set_pwm_temp_map, 0);
1188static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1189                            show_auto_pwm, set_auto_pwm, 0, 0);
1190static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1191                            show_auto_pwm, set_auto_pwm, 0, 1);
1192static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1193                            show_auto_pwm, set_auto_pwm, 0, 2);
1194static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1195                            show_auto_pwm, NULL, 0, 3);
1196static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1197                            show_auto_temp, set_auto_temp, 0, 1);
1198static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1199                            show_auto_temp, set_auto_temp, 0, 0);
1200static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1201                            show_auto_temp, set_auto_temp, 0, 2);
1202static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1203                            show_auto_temp, set_auto_temp, 0, 3);
1204static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1205                            show_auto_temp, set_auto_temp, 0, 4);
1206
1207static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1208                          show_pwm_enable, set_pwm_enable, 1);
1209static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1210static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1211static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1212                          show_pwm_temp_map, set_pwm_temp_map, 1);
1213static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1214                            show_auto_pwm, set_auto_pwm, 1, 0);
1215static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1216                            show_auto_pwm, set_auto_pwm, 1, 1);
1217static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1218                            show_auto_pwm, set_auto_pwm, 1, 2);
1219static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1220                            show_auto_pwm, NULL, 1, 3);
1221static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1222                            show_auto_temp, set_auto_temp, 1, 1);
1223static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1224                            show_auto_temp, set_auto_temp, 1, 0);
1225static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1226                            show_auto_temp, set_auto_temp, 1, 2);
1227static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1228                            show_auto_temp, set_auto_temp, 1, 3);
1229static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1230                            show_auto_temp, set_auto_temp, 1, 4);
1231
1232static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1233                          show_pwm_enable, set_pwm_enable, 2);
1234static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1235static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1236static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1237                          show_pwm_temp_map, set_pwm_temp_map, 2);
1238static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1239                            show_auto_pwm, set_auto_pwm, 2, 0);
1240static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1241                            show_auto_pwm, set_auto_pwm, 2, 1);
1242static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1243                            show_auto_pwm, set_auto_pwm, 2, 2);
1244static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1245                            show_auto_pwm, NULL, 2, 3);
1246static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1247                            show_auto_temp, set_auto_temp, 2, 1);
1248static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1249                            show_auto_temp, set_auto_temp, 2, 0);
1250static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1251                            show_auto_temp, set_auto_temp, 2, 2);
1252static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1253                            show_auto_temp, set_auto_temp, 2, 3);
1254static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1255                            show_auto_temp, set_auto_temp, 2, 4);
1256
1257/* Alarms */
1258static 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}
1264static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1265
1266static 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
1274static 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
1299static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1300static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1301static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1302static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1303static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1304static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1305static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1306static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1307static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1308static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1309static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1310static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1311static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1312static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1313static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1314static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1315static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1316                          show_alarm, clear_intrusion, 4);
1317
1318static 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}
1325static 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
1347static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1348                          show_beep, set_beep, 1);
1349static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1350static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1351static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1352static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1353static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1354static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1355static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1356/* fanX_beep writability is set later */
1357static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1358static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1359static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1360static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1361static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1362static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1363                          show_beep, set_beep, 2);
1364static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1365static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1366
1367static 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}
1373static 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}
1386static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1387
1388static 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}
1394static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1395
1396static 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}
1415static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1416static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1417static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1418
1419static 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}
1425static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1426
1427static 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
1481static 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
1493static 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
1517static 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
1523static 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
1529static 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
1536static const struct attribute_group it87_group = {
1537        .attrs = it87_attributes,
1538};
1539
1540static 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
1552static 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
1558static 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
1585static 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
1593static 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
1599static 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
1619static 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
1625static 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
1660static 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
1666static 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
1674static struct attribute *it87_attributes_vid[] = {
1675        &dev_attr_vrm.attr,
1676        &dev_attr_cpu0_vid.attr,
1677        NULL
1678};
1679
1680static const struct attribute_group it87_group_vid = {
1681        .attrs = it87_attributes_vid,
1682};
1683
1684static 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
1691static 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 */
1696static 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
1957exit:
1958        superio_exit();
1959        return err;
1960}
1961
1962static 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->platform_data;
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
2012static 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->platform_data;
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
2222error:
2223        it87_remove_files(dev);
2224        return err;
2225}
2226
2227static 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 */
2242static 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 */
2253static 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 */
2260static 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. */
2317static void it87_init_device(struct platform_device *pdev)
2318{
2319        struct it87_sio_data *sio_data = pdev->dev.platform_data;
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
2414static 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
2440static 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
2544static 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
2587exit_device_put:
2588        platform_device_put(pdev);
2589exit:
2590        return err;
2591}
2592
2593static 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
2616static void __exit sm_it87_exit(void)
2617{
2618        platform_device_unregister(pdev);
2619        platform_driver_unregister(&it87_driver);
2620}
2621
2622
2623MODULE_AUTHOR("Chris Gauthron, Jean Delvare <khali@linux-fr.org>");
2624MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2625module_param(update_vbat, bool, 0);
2626MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2627module_param(fix_pwm_polarity, bool, 0);
2628MODULE_PARM_DESC(fix_pwm_polarity,
2629                 "Force PWM polarity to active high (DANGEROUS)");
2630MODULE_LICENSE("GPL");
2631
2632module_init(sm_it87_init);
2633module_exit(sm_it87_exit);
2634
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