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 *            IT8782F  Super I/O chip w/LPC interface
  23 *            IT8783E/F Super I/O chip w/LPC interface
  24 *            Sis950   A clone of the IT8705F
  25 *
  26 *  Copyright (C) 2001 Chris Gauthron
  27 *  Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
  28 *
  29 *  This program is free software; you can redistribute it and/or modify
  30 *  it under the terms of the GNU General Public License as published by
  31 *  the Free Software Foundation; either version 2 of the License, or
  32 *  (at your option) any later version.
  33 *
  34 *  This program is distributed in the hope that it will be useful,
  35 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  36 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  37 *  GNU General Public License for more details.
  38 *
  39 *  You should have received a copy of the GNU General Public License
  40 *  along with this program; if not, write to the Free Software
  41 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  42 */
  43
  44#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  45
  46#include <linux/module.h>
  47#include <linux/init.h>
  48#include <linux/slab.h>
  49#include <linux/jiffies.h>
  50#include <linux/platform_device.h>
  51#include <linux/hwmon.h>
  52#include <linux/hwmon-sysfs.h>
  53#include <linux/hwmon-vid.h>
  54#include <linux/err.h>
  55#include <linux/mutex.h>
  56#include <linux/sysfs.h>
  57#include <linux/string.h>
  58#include <linux/dmi.h>
  59#include <linux/acpi.h>
  60#include <linux/io.h>
  61
  62#define DRVNAME "it87"
  63
  64enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782,
  65             it8783 };
  66
  67static unsigned short force_id;
  68module_param(force_id, ushort, 0);
  69MODULE_PARM_DESC(force_id, "Override the detected device ID");
  70
  71static struct platform_device *pdev;
  72
  73#define REG     0x2e    /* The register to read/write */
  74#define DEV     0x07    /* Register: Logical device select */
  75#define VAL     0x2f    /* The value to read/write */
  76#define PME     0x04    /* The device with the fan registers in it */
  77
  78/* The device with the IT8718F/IT8720F VID value in it */
  79#define GPIO    0x07
  80
  81#define DEVID   0x20    /* Register: Device ID */
  82#define DEVREV  0x22    /* Register: Device Revision */
  83
  84static inline int superio_inb(int reg)
  85{
  86        outb(reg, REG);
  87        return inb(VAL);
  88}
  89
  90static inline void superio_outb(int reg, int val)
  91{
  92        outb(reg, REG);
  93        outb(val, VAL);
  94}
  95
  96static int superio_inw(int reg)
  97{
  98        int val;
  99        outb(reg++, REG);
 100        val = inb(VAL) << 8;
 101        outb(reg, REG);
 102        val |= inb(VAL);
 103        return val;
 104}
 105
 106static inline void superio_select(int ldn)
 107{
 108        outb(DEV, REG);
 109        outb(ldn, VAL);
 110}
 111
 112static inline int superio_enter(void)
 113{
 114        /*
 115         * Try to reserve REG and REG + 1 for exclusive access.
 116         */
 117        if (!request_muxed_region(REG, 2, DRVNAME))
 118                return -EBUSY;
 119
 120        outb(0x87, REG);
 121        outb(0x01, REG);
 122        outb(0x55, REG);
 123        outb(0x55, REG);
 124        return 0;
 125}
 126
 127static inline void superio_exit(void)
 128{
 129        outb(0x02, REG);
 130        outb(0x02, VAL);
 131        release_region(REG, 2);
 132}
 133
 134/* Logical device 4 registers */
 135#define IT8712F_DEVID 0x8712
 136#define IT8705F_DEVID 0x8705
 137#define IT8716F_DEVID 0x8716
 138#define IT8718F_DEVID 0x8718
 139#define IT8720F_DEVID 0x8720
 140#define IT8721F_DEVID 0x8721
 141#define IT8726F_DEVID 0x8726
 142#define IT8728F_DEVID 0x8728
 143#define IT8782F_DEVID 0x8782
 144#define IT8783E_DEVID 0x8783
 145#define IT87_ACT_REG  0x30
 146#define IT87_BASE_REG 0x60
 147
 148/* Logical device 7 registers (IT8712F and later) */
 149#define IT87_SIO_GPIO1_REG      0x25
 150#define IT87_SIO_GPIO3_REG      0x27
 151#define IT87_SIO_GPIO5_REG      0x29
 152#define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
 153#define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
 154#define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
 155#define IT87_SIO_VID_REG        0xfc    /* VID value */
 156#define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
 157
 158/* Update battery voltage after every reading if true */
 159static bool update_vbat;
 160
 161/* Not all BIOSes properly configure the PWM registers */
 162static bool fix_pwm_polarity;
 163
 164/* Many IT87 constants specified below */
 165
 166/* Length of ISA address segment */
 167#define IT87_EXTENT 8
 168
 169/* Length of ISA address segment for Environmental Controller */
 170#define IT87_EC_EXTENT 2
 171
 172/* Offset of EC registers from ISA base address */
 173#define IT87_EC_OFFSET 5
 174
 175/* Where are the ISA address/data registers relative to the EC base address */
 176#define IT87_ADDR_REG_OFFSET 0
 177#define IT87_DATA_REG_OFFSET 1
 178
 179/*----- The IT87 registers -----*/
 180
 181#define IT87_REG_CONFIG        0x00
 182
 183#define IT87_REG_ALARM1        0x01
 184#define IT87_REG_ALARM2        0x02
 185#define IT87_REG_ALARM3        0x03
 186
 187/*
 188 * The IT8718F and IT8720F have the VID value in a different register, in
 189 * Super-I/O configuration space.
 190 */
 191#define IT87_REG_VID           0x0a
 192/*
 193 * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
 194 * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
 195 * mode.
 196 */
 197#define IT87_REG_FAN_DIV       0x0b
 198#define IT87_REG_FAN_16BIT     0x0c
 199
 200/* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 201
 202static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
 203static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
 204static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
 205static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 206#define IT87_REG_FAN_MAIN_CTRL 0x13
 207#define IT87_REG_FAN_CTL       0x14
 208#define IT87_REG_PWM(nr)       (0x15 + (nr))
 209#define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
 210
 211#define IT87_REG_VIN(nr)       (0x20 + (nr))
 212#define IT87_REG_TEMP(nr)      (0x29 + (nr))
 213
 214#define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 215#define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 216#define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 217#define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 218
 219#define IT87_REG_VIN_ENABLE    0x50
 220#define IT87_REG_TEMP_ENABLE   0x51
 221#define IT87_REG_TEMP_EXTRA    0x55
 222#define IT87_REG_BEEP_ENABLE   0x5c
 223
 224#define IT87_REG_CHIPID        0x58
 225
 226#define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 227#define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 228
 229
 230struct it87_sio_data {
 231        enum chips type;
 232        /* Values read from Super-I/O config space */
 233        u8 revision;
 234        u8 vid_value;
 235        u8 beep_pin;
 236        u8 internal;    /* Internal sensors can be labeled */
 237        /* Features skipped based on config or DMI */
 238        u16 skip_in;
 239        u8 skip_vid;
 240        u8 skip_fan;
 241        u8 skip_pwm;
 242        u8 skip_temp;
 243};
 244
 245/*
 246 * For each registered chip, we need to keep some data in memory.
 247 * The structure is dynamically allocated.
 248 */
 249struct it87_data {
 250        struct device *hwmon_dev;
 251        enum chips type;
 252        u8 revision;
 253
 254        unsigned short addr;
 255        const char *name;
 256        struct mutex update_lock;
 257        char valid;             /* !=0 if following fields are valid */
 258        unsigned long last_updated;     /* In jiffies */
 259
 260        u16 in_scaled;          /* Internal voltage sensors are scaled */
 261        u8 in[9];               /* Register value */
 262        u8 in_max[8];           /* Register value */
 263        u8 in_min[8];           /* Register value */
 264        u8 has_fan;             /* Bitfield, fans enabled */
 265        u16 fan[5];             /* Register values, possibly combined */
 266        u16 fan_min[5];         /* Register values, possibly combined */
 267        u8 has_temp;            /* Bitfield, temp sensors enabled */
 268        s8 temp[3];             /* Register value */
 269        s8 temp_high[3];        /* Register value */
 270        s8 temp_low[3];         /* Register value */
 271        u8 sensor;              /* Register value */
 272        u8 fan_div[3];          /* Register encoding, shifted right */
 273        u8 vid;                 /* Register encoding, combined */
 274        u8 vrm;
 275        u32 alarms;             /* Register encoding, combined */
 276        u8 beeps;               /* Register encoding */
 277        u8 fan_main_ctrl;       /* Register value */
 278        u8 fan_ctl;             /* Register value */
 279
 280        /*
 281         * The following 3 arrays correspond to the same registers up to
 282         * the IT8720F. The meaning of bits 6-0 depends on the value of bit
 283         * 7, and we want to preserve settings on mode changes, so we have
 284         * to track all values separately.
 285         * Starting with the IT8721F, the manual PWM duty cycles are stored
 286         * in separate registers (8-bit values), so the separate tracking
 287         * is no longer needed, but it is still done to keep the driver
 288         * simple.
 289         */
 290        u8 pwm_ctrl[3];         /* Register value */
 291        u8 pwm_duty[3];         /* Manual PWM value set by user */
 292        u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
 293
 294        /* Automatic fan speed control registers */
 295        u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
 296        s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
 297};
 298
 299static inline int has_12mv_adc(const struct it87_data *data)
 300{
 301        /*
 302         * IT8721F and later have a 12 mV ADC, also with internal scaling
 303         * on selected inputs.
 304         */
 305        return data->type == it8721
 306            || data->type == it8728;
 307}
 308
 309static inline int has_newer_autopwm(const struct it87_data *data)
 310{
 311        /*
 312         * IT8721F and later have separate registers for the temperature
 313         * mapping and the manual duty cycle.
 314         */
 315        return data->type == it8721
 316            || data->type == it8728;
 317}
 318
 319static int adc_lsb(const struct it87_data *data, int nr)
 320{
 321        int lsb = has_12mv_adc(data) ? 12 : 16;
 322        if (data->in_scaled & (1 << nr))
 323                lsb <<= 1;
 324        return lsb;
 325}
 326
 327static u8 in_to_reg(const struct it87_data *data, int nr, long val)
 328{
 329        val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
 330        return SENSORS_LIMIT(val, 0, 255);
 331}
 332
 333static int in_from_reg(const struct it87_data *data, int nr, int val)
 334{
 335        return val * adc_lsb(data, nr);
 336}
 337
 338static inline u8 FAN_TO_REG(long rpm, int div)
 339{
 340        if (rpm == 0)
 341                return 255;
 342        rpm = SENSORS_LIMIT(rpm, 1, 1000000);
 343        return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
 344                             254);
 345}
 346
 347static inline u16 FAN16_TO_REG(long rpm)
 348{
 349        if (rpm == 0)
 350                return 0xffff;
 351        return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 352}
 353
 354#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
 355                                1350000 / ((val) * (div)))
 356/* The divider is fixed to 2 in 16-bit mode */
 357#define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
 358                             1350000 / ((val) * 2))
 359
 360#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
 361                                        ((val) + 500) / 1000), -128, 127))
 362#define TEMP_FROM_REG(val) ((val) * 1000)
 363
 364static u8 pwm_to_reg(const struct it87_data *data, long val)
 365{
 366        if (has_newer_autopwm(data))
 367                return val;
 368        else
 369                return val >> 1;
 370}
 371
 372static int pwm_from_reg(const struct it87_data *data, u8 reg)
 373{
 374        if (has_newer_autopwm(data))
 375                return reg;
 376        else
 377                return (reg & 0x7f) << 1;
 378}
 379
 380
 381static int DIV_TO_REG(int val)
 382{
 383        int answer = 0;
 384        while (answer < 7 && (val >>= 1))
 385                answer++;
 386        return answer;
 387}
 388#define DIV_FROM_REG(val) (1 << (val))
 389
 390static const unsigned int pwm_freq[8] = {
 391        48000000 / 128,
 392        24000000 / 128,
 393        12000000 / 128,
 394        8000000 / 128,
 395        6000000 / 128,
 396        3000000 / 128,
 397        1500000 / 128,
 398        750000 / 128,
 399};
 400
 401static inline int has_16bit_fans(const struct it87_data *data)
 402{
 403        /*
 404         * IT8705F Datasheet 0.4.1, 3h == Version G.
 405         * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
 406         * These are the first revisions with 16-bit tachometer support.
 407         */
 408        return (data->type == it87 && data->revision >= 0x03)
 409            || (data->type == it8712 && data->revision >= 0x08)
 410            || data->type == it8716
 411            || data->type == it8718
 412            || data->type == it8720
 413            || data->type == it8721
 414            || data->type == it8728
 415            || data->type == it8782
 416            || data->type == it8783;
 417}
 418
 419static inline int has_old_autopwm(const struct it87_data *data)
 420{
 421        /*
 422         * The old automatic fan speed control interface is implemented
 423         * by IT8705F chips up to revision F and IT8712F chips up to
 424         * revision G.
 425         */
 426        return (data->type == it87 && data->revision < 0x03)
 427            || (data->type == it8712 && data->revision < 0x08);
 428}
 429
 430static int it87_probe(struct platform_device *pdev);
 431static int __devexit it87_remove(struct platform_device *pdev);
 432
 433static int it87_read_value(struct it87_data *data, u8 reg);
 434static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 435static struct it87_data *it87_update_device(struct device *dev);
 436static int it87_check_pwm(struct device *dev);
 437static void it87_init_device(struct platform_device *pdev);
 438
 439
 440static struct platform_driver it87_driver = {
 441        .driver = {
 442                .owner  = THIS_MODULE,
 443                .name   = DRVNAME,
 444        },
 445        .probe  = it87_probe,
 446        .remove = __devexit_p(it87_remove),
 447};
 448
 449static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 450                char *buf)
 451{
 452        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 453        int nr = sensor_attr->index;
 454
 455        struct it87_data *data = it87_update_device(dev);
 456        return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
 457}
 458
 459static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 460                char *buf)
 461{
 462        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 463        int nr = sensor_attr->index;
 464
 465        struct it87_data *data = it87_update_device(dev);
 466        return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
 467}
 468
 469static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 470                char *buf)
 471{
 472        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 473        int nr = sensor_attr->index;
 474
 475        struct it87_data *data = it87_update_device(dev);
 476        return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
 477}
 478
 479static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 480                const char *buf, size_t count)
 481{
 482        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 483        int nr = sensor_attr->index;
 484
 485        struct it87_data *data = dev_get_drvdata(dev);
 486        unsigned long val;
 487
 488        if (kstrtoul(buf, 10, &val) < 0)
 489                return -EINVAL;
 490
 491        mutex_lock(&data->update_lock);
 492        data->in_min[nr] = in_to_reg(data, nr, val);
 493        it87_write_value(data, IT87_REG_VIN_MIN(nr),
 494                        data->in_min[nr]);
 495        mutex_unlock(&data->update_lock);
 496        return count;
 497}
 498static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 499                const char *buf, size_t count)
 500{
 501        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 502        int nr = sensor_attr->index;
 503
 504        struct it87_data *data = dev_get_drvdata(dev);
 505        unsigned long val;
 506
 507        if (kstrtoul(buf, 10, &val) < 0)
 508                return -EINVAL;
 509
 510        mutex_lock(&data->update_lock);
 511        data->in_max[nr] = in_to_reg(data, nr, val);
 512        it87_write_value(data, IT87_REG_VIN_MAX(nr),
 513                        data->in_max[nr]);
 514        mutex_unlock(&data->update_lock);
 515        return count;
 516}
 517
 518#define show_in_offset(offset)                                  \
 519static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 520                show_in, NULL, offset);
 521
 522#define limit_in_offset(offset)                                 \
 523static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 524                show_in_min, set_in_min, offset);               \
 525static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 526                show_in_max, set_in_max, offset);
 527
 528show_in_offset(0);
 529limit_in_offset(0);
 530show_in_offset(1);
 531limit_in_offset(1);
 532show_in_offset(2);
 533limit_in_offset(2);
 534show_in_offset(3);
 535limit_in_offset(3);
 536show_in_offset(4);
 537limit_in_offset(4);
 538show_in_offset(5);
 539limit_in_offset(5);
 540show_in_offset(6);
 541limit_in_offset(6);
 542show_in_offset(7);
 543limit_in_offset(7);
 544show_in_offset(8);
 545
 546/* 3 temperatures */
 547static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 548                char *buf)
 549{
 550        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 551        int nr = sensor_attr->index;
 552
 553        struct it87_data *data = it87_update_device(dev);
 554        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 555}
 556static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 557                char *buf)
 558{
 559        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 560        int nr = sensor_attr->index;
 561
 562        struct it87_data *data = it87_update_device(dev);
 563        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 564}
 565static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 566                char *buf)
 567{
 568        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 569        int nr = sensor_attr->index;
 570
 571        struct it87_data *data = it87_update_device(dev);
 572        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
 573}
 574static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 575                const char *buf, size_t count)
 576{
 577        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 578        int nr = sensor_attr->index;
 579
 580        struct it87_data *data = dev_get_drvdata(dev);
 581        long val;
 582
 583        if (kstrtol(buf, 10, &val) < 0)
 584                return -EINVAL;
 585
 586        mutex_lock(&data->update_lock);
 587        data->temp_high[nr] = TEMP_TO_REG(val);
 588        it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 589        mutex_unlock(&data->update_lock);
 590        return count;
 591}
 592static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 593                const char *buf, size_t count)
 594{
 595        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 596        int nr = sensor_attr->index;
 597
 598        struct it87_data *data = dev_get_drvdata(dev);
 599        long val;
 600
 601        if (kstrtol(buf, 10, &val) < 0)
 602                return -EINVAL;
 603
 604        mutex_lock(&data->update_lock);
 605        data->temp_low[nr] = TEMP_TO_REG(val);
 606        it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
 607        mutex_unlock(&data->update_lock);
 608        return count;
 609}
 610#define show_temp_offset(offset)                                        \
 611static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,                \
 612                show_temp, NULL, offset - 1);                           \
 613static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
 614                show_temp_max, set_temp_max, offset - 1);               \
 615static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
 616                show_temp_min, set_temp_min, offset - 1);
 617
 618show_temp_offset(1);
 619show_temp_offset(2);
 620show_temp_offset(3);
 621
 622static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
 623                char *buf)
 624{
 625        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 626        int nr = sensor_attr->index;
 627        struct it87_data *data = it87_update_device(dev);
 628        u8 reg = data->sensor;      /* In case value is updated while used */
 629
 630        if (reg & (1 << nr))
 631                return sprintf(buf, "3\n");  /* thermal diode */
 632        if (reg & (8 << nr))
 633                return sprintf(buf, "4\n");  /* thermistor */
 634        return sprintf(buf, "0\n");      /* disabled */
 635}
 636static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
 637                const char *buf, size_t count)
 638{
 639        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 640        int nr = sensor_attr->index;
 641
 642        struct it87_data *data = dev_get_drvdata(dev);
 643        long val;
 644        u8 reg;
 645
 646        if (kstrtol(buf, 10, &val) < 0)
 647                return -EINVAL;
 648
 649        reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 650        reg &= ~(1 << nr);
 651        reg &= ~(8 << nr);
 652        if (val == 2) { /* backwards compatibility */
 653                dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
 654                         "instead\n");
 655                val = 4;
 656        }
 657        /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
 658        if (val == 3)
 659                reg |= 1 << nr;
 660        else if (val == 4)
 661                reg |= 8 << nr;
 662        else if (val != 0)
 663                return -EINVAL;
 664
 665        mutex_lock(&data->update_lock);
 666        data->sensor = reg;
 667        it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 668        data->valid = 0;        /* Force cache refresh */
 669        mutex_unlock(&data->update_lock);
 670        return count;
 671}
 672#define show_sensor_offset(offset)                                      \
 673static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR,       \
 674                show_sensor, set_sensor, offset - 1);
 675
 676show_sensor_offset(1);
 677show_sensor_offset(2);
 678show_sensor_offset(3);
 679
 680/* 3 Fans */
 681
 682static int pwm_mode(const struct it87_data *data, int nr)
 683{
 684        int ctrl = data->fan_main_ctrl & (1 << nr);
 685
 686        if (ctrl == 0)                                  /* Full speed */
 687                return 0;
 688        if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 689                return 2;
 690        else                                            /* Manual mode */
 691                return 1;
 692}
 693
 694static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 695                char *buf)
 696{
 697        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 698        int nr = sensor_attr->index;
 699
 700        struct it87_data *data = it87_update_device(dev);
 701        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 702                                DIV_FROM_REG(data->fan_div[nr])));
 703}
 704static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 705                char *buf)
 706{
 707        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 708        int nr = sensor_attr->index;
 709
 710        struct it87_data *data = it87_update_device(dev);
 711        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 712                                DIV_FROM_REG(data->fan_div[nr])));
 713}
 714static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 715                char *buf)
 716{
 717        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 718        int nr = sensor_attr->index;
 719
 720        struct it87_data *data = it87_update_device(dev);
 721        return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 722}
 723static ssize_t show_pwm_enable(struct device *dev,
 724                struct device_attribute *attr, char *buf)
 725{
 726        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 727        int nr = sensor_attr->index;
 728
 729        struct it87_data *data = it87_update_device(dev);
 730        return sprintf(buf, "%d\n", pwm_mode(data, nr));
 731}
 732static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 733                char *buf)
 734{
 735        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 736        int nr = sensor_attr->index;
 737
 738        struct it87_data *data = it87_update_device(dev);
 739        return sprintf(buf, "%d\n",
 740                       pwm_from_reg(data, data->pwm_duty[nr]));
 741}
 742static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 743                char *buf)
 744{
 745        struct it87_data *data = it87_update_device(dev);
 746        int index = (data->fan_ctl >> 4) & 0x07;
 747
 748        return sprintf(buf, "%u\n", pwm_freq[index]);
 749}
 750static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 751                const char *buf, size_t count)
 752{
 753        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 754        int nr = sensor_attr->index;
 755
 756        struct it87_data *data = dev_get_drvdata(dev);
 757        long val;
 758        u8 reg;
 759
 760        if (kstrtol(buf, 10, &val) < 0)
 761                return -EINVAL;
 762
 763        mutex_lock(&data->update_lock);
 764        reg = it87_read_value(data, IT87_REG_FAN_DIV);
 765        switch (nr) {
 766        case 0:
 767                data->fan_div[nr] = reg & 0x07;
 768                break;
 769        case 1:
 770                data->fan_div[nr] = (reg >> 3) & 0x07;
 771                break;
 772        case 2:
 773                data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 774                break;
 775        }
 776
 777        data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 778        it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 779        mutex_unlock(&data->update_lock);
 780        return count;
 781}
 782static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 783                const char *buf, size_t count)
 784{
 785        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 786        int nr = sensor_attr->index;
 787
 788        struct it87_data *data = dev_get_drvdata(dev);
 789        unsigned long val;
 790        int min;
 791        u8 old;
 792
 793        if (kstrtoul(buf, 10, &val) < 0)
 794                return -EINVAL;
 795
 796        mutex_lock(&data->update_lock);
 797        old = it87_read_value(data, IT87_REG_FAN_DIV);
 798
 799        /* Save fan min limit */
 800        min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 801
 802        switch (nr) {
 803        case 0:
 804        case 1:
 805                data->fan_div[nr] = DIV_TO_REG(val);
 806                break;
 807        case 2:
 808                if (val < 8)
 809                        data->fan_div[nr] = 1;
 810                else
 811                        data->fan_div[nr] = 3;
 812        }
 813        val = old & 0x80;
 814        val |= (data->fan_div[0] & 0x07);
 815        val |= (data->fan_div[1] & 0x07) << 3;
 816        if (data->fan_div[2] == 3)
 817                val |= 0x1 << 6;
 818        it87_write_value(data, IT87_REG_FAN_DIV, val);
 819
 820        /* Restore fan min limit */
 821        data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 822        it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 823
 824        mutex_unlock(&data->update_lock);
 825        return count;
 826}
 827
 828/* Returns 0 if OK, -EINVAL otherwise */
 829static int check_trip_points(struct device *dev, int nr)
 830{
 831        const struct it87_data *data = dev_get_drvdata(dev);
 832        int i, err = 0;
 833
 834        if (has_old_autopwm(data)) {
 835                for (i = 0; i < 3; i++) {
 836                        if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 837                                err = -EINVAL;
 838                }
 839                for (i = 0; i < 2; i++) {
 840                        if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 841                                err = -EINVAL;
 842                }
 843        }
 844
 845        if (err) {
 846                dev_err(dev, "Inconsistent trip points, not switching to "
 847                        "automatic mode\n");
 848                dev_err(dev, "Adjust the trip points and try again\n");
 849        }
 850        return err;
 851}
 852
 853static ssize_t set_pwm_enable(struct device *dev,
 854                struct device_attribute *attr, const char *buf, size_t count)
 855{
 856        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 857        int nr = sensor_attr->index;
 858
 859        struct it87_data *data = dev_get_drvdata(dev);
 860        long val;
 861
 862        if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
 863                return -EINVAL;
 864
 865        /* Check trip points before switching to automatic mode */
 866        if (val == 2) {
 867                if (check_trip_points(dev, nr) < 0)
 868                        return -EINVAL;
 869        }
 870
 871        mutex_lock(&data->update_lock);
 872
 873        if (val == 0) {
 874                int tmp;
 875                /* make sure the fan is on when in on/off mode */
 876                tmp = it87_read_value(data, IT87_REG_FAN_CTL);
 877                it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
 878                /* set on/off mode */
 879                data->fan_main_ctrl &= ~(1 << nr);
 880                it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 881                                 data->fan_main_ctrl);
 882        } else {
 883                if (val == 1)                           /* Manual mode */
 884                        data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
 885                                             data->pwm_temp_map[nr] :
 886                                             data->pwm_duty[nr];
 887                else                                    /* Automatic mode */
 888                        data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 889                it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 890                /* set SmartGuardian mode */
 891                data->fan_main_ctrl |= (1 << nr);
 892                it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 893                                 data->fan_main_ctrl);
 894        }
 895
 896        mutex_unlock(&data->update_lock);
 897        return count;
 898}
 899static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 900                const char *buf, size_t count)
 901{
 902        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 903        int nr = sensor_attr->index;
 904
 905        struct it87_data *data = dev_get_drvdata(dev);
 906        long val;
 907
 908        if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 909                return -EINVAL;
 910
 911        mutex_lock(&data->update_lock);
 912        if (has_newer_autopwm(data)) {
 913                /*
 914                 * If we are in automatic mode, the PWM duty cycle register
 915                 * is read-only so we can't write the value.
 916                 */
 917                if (data->pwm_ctrl[nr] & 0x80) {
 918                        mutex_unlock(&data->update_lock);
 919                        return -EBUSY;
 920                }
 921                data->pwm_duty[nr] = pwm_to_reg(data, val);
 922                it87_write_value(data, IT87_REG_PWM_DUTY(nr),
 923                                 data->pwm_duty[nr]);
 924        } else {
 925                data->pwm_duty[nr] = pwm_to_reg(data, val);
 926                /*
 927                 * If we are in manual mode, write the duty cycle immediately;
 928                 * otherwise, just store it for later use.
 929                 */
 930                if (!(data->pwm_ctrl[nr] & 0x80)) {
 931                        data->pwm_ctrl[nr] = data->pwm_duty[nr];
 932                        it87_write_value(data, IT87_REG_PWM(nr),
 933                                         data->pwm_ctrl[nr]);
 934                }
 935        }
 936        mutex_unlock(&data->update_lock);
 937        return count;
 938}
 939static ssize_t set_pwm_freq(struct device *dev,
 940                struct device_attribute *attr, const char *buf, size_t count)
 941{
 942        struct it87_data *data = dev_get_drvdata(dev);
 943        unsigned long val;
 944        int i;
 945
 946        if (kstrtoul(buf, 10, &val) < 0)
 947                return -EINVAL;
 948
 949        /* Search for the nearest available frequency */
 950        for (i = 0; i < 7; i++) {
 951                if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
 952                        break;
 953        }
 954
 955        mutex_lock(&data->update_lock);
 956        data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
 957        data->fan_ctl |= i << 4;
 958        it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
 959        mutex_unlock(&data->update_lock);
 960
 961        return count;
 962}
 963static ssize_t show_pwm_temp_map(struct device *dev,
 964                struct device_attribute *attr, char *buf)
 965{
 966        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 967        int nr = sensor_attr->index;
 968
 969        struct it87_data *data = it87_update_device(dev);
 970        int map;
 971
 972        if (data->pwm_temp_map[nr] < 3)
 973                map = 1 << data->pwm_temp_map[nr];
 974        else
 975                map = 0;                        /* Should never happen */
 976        return sprintf(buf, "%d\n", map);
 977}
 978static ssize_t set_pwm_temp_map(struct device *dev,
 979                struct device_attribute *attr, const char *buf, size_t count)
 980{
 981        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 982        int nr = sensor_attr->index;
 983
 984        struct it87_data *data = dev_get_drvdata(dev);
 985        long val;
 986        u8 reg;
 987
 988        /*
 989         * This check can go away if we ever support automatic fan speed
 990         * control on newer chips.
 991         */
 992        if (!has_old_autopwm(data)) {
 993                dev_notice(dev, "Mapping change disabled for safety reasons\n");
 994                return -EINVAL;
 995        }
 996
 997        if (kstrtol(buf, 10, &val) < 0)
 998                return -EINVAL;
 999
1000        switch (val) {
1001        case (1 << 0):
1002                reg = 0x00;
1003                break;
1004        case (1 << 1):
1005                reg = 0x01;
1006                break;
1007        case (1 << 2):
1008                reg = 0x02;
1009                break;
1010        default:
1011                return -EINVAL;
1012        }
1013
1014        mutex_lock(&data->update_lock);
1015        data->pwm_temp_map[nr] = reg;
1016        /*
1017         * If we are in automatic mode, write the temp mapping immediately;
1018         * otherwise, just store it for later use.
1019         */
1020        if (data->pwm_ctrl[nr] & 0x80) {
1021                data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1022                it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1023        }
1024        mutex_unlock(&data->update_lock);
1025        return count;
1026}
1027
1028static ssize_t show_auto_pwm(struct device *dev,
1029                struct device_attribute *attr, char *buf)
1030{
1031        struct it87_data *data = it87_update_device(dev);
1032        struct sensor_device_attribute_2 *sensor_attr =
1033                        to_sensor_dev_attr_2(attr);
1034        int nr = sensor_attr->nr;
1035        int point = sensor_attr->index;
1036
1037        return sprintf(buf, "%d\n",
1038                       pwm_from_reg(data, data->auto_pwm[nr][point]));
1039}
1040
1041static ssize_t set_auto_pwm(struct device *dev,
1042                struct device_attribute *attr, const char *buf, size_t count)
1043{
1044        struct it87_data *data = dev_get_drvdata(dev);
1045        struct sensor_device_attribute_2 *sensor_attr =
1046                        to_sensor_dev_attr_2(attr);
1047        int nr = sensor_attr->nr;
1048        int point = sensor_attr->index;
1049        long val;
1050
1051        if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1052                return -EINVAL;
1053
1054        mutex_lock(&data->update_lock);
1055        data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1056        it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1057                         data->auto_pwm[nr][point]);
1058        mutex_unlock(&data->update_lock);
1059        return count;
1060}
1061
1062static ssize_t show_auto_temp(struct device *dev,
1063                struct device_attribute *attr, char *buf)
1064{
1065        struct it87_data *data = it87_update_device(dev);
1066        struct sensor_device_attribute_2 *sensor_attr =
1067                        to_sensor_dev_attr_2(attr);
1068        int nr = sensor_attr->nr;
1069        int point = sensor_attr->index;
1070
1071        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1072}
1073
1074static ssize_t set_auto_temp(struct device *dev,
1075                struct device_attribute *attr, const char *buf, size_t count)
1076{
1077        struct it87_data *data = dev_get_drvdata(dev);
1078        struct sensor_device_attribute_2 *sensor_attr =
1079                        to_sensor_dev_attr_2(attr);
1080        int nr = sensor_attr->nr;
1081        int point = sensor_attr->index;
1082        long val;
1083
1084        if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1085                return -EINVAL;
1086
1087        mutex_lock(&data->update_lock);
1088        data->auto_temp[nr][point] = TEMP_TO_REG(val);
1089        it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1090                         data->auto_temp[nr][point]);
1091        mutex_unlock(&data->update_lock);
1092        return count;
1093}
1094
1095#define show_fan_offset(offset)                                 \
1096static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,         \
1097                show_fan, NULL, offset - 1);                    \
1098static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1099                show_fan_min, set_fan_min, offset - 1);         \
1100static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1101                show_fan_div, set_fan_div, offset - 1);
1102
1103show_fan_offset(1);
1104show_fan_offset(2);
1105show_fan_offset(3);
1106
1107#define show_pwm_offset(offset)                                         \
1108static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,      \
1109                show_pwm_enable, set_pwm_enable, offset - 1);           \
1110static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \
1111                show_pwm, set_pwm, offset - 1);                         \
1112static DEVICE_ATTR(pwm##offset##_freq,                                  \
1113                (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),            \
1114                show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));    \
1115static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp,             \
1116                S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1117                offset - 1);                                            \
1118static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm,              \
1119                S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1120                offset - 1, 0);                                         \
1121static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm,              \
1122                S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1123                offset - 1, 1);                                         \
1124static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm,              \
1125                S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1126                offset - 1, 2);                                         \
1127static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm,              \
1128                S_IRUGO, show_auto_pwm, NULL, offset - 1, 3);           \
1129static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp,             \
1130                S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1131                offset - 1, 1);                                         \
1132static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst,        \
1133                S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1134                offset - 1, 0);                                         \
1135static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp,             \
1136                S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1137                offset - 1, 2);                                         \
1138static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp,             \
1139                S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1140                offset - 1, 3);                                         \
1141static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp,             \
1142                S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1143                offset - 1, 4);
1144
1145show_pwm_offset(1);
1146show_pwm_offset(2);
1147show_pwm_offset(3);
1148
1149/* A different set of callbacks for 16-bit fans */
1150static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1151                char *buf)
1152{
1153        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1154        int nr = sensor_attr->index;
1155        struct it87_data *data = it87_update_device(dev);
1156        return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1157}
1158
1159static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1160                char *buf)
1161{
1162        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1163        int nr = sensor_attr->index;
1164        struct it87_data *data = it87_update_device(dev);
1165        return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1166}
1167
1168static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1169                const char *buf, size_t count)
1170{
1171        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1172        int nr = sensor_attr->index;
1173        struct it87_data *data = dev_get_drvdata(dev);
1174        long val;
1175
1176        if (kstrtol(buf, 10, &val) < 0)
1177                return -EINVAL;
1178
1179        mutex_lock(&data->update_lock);
1180        data->fan_min[nr] = FAN16_TO_REG(val);
1181        it87_write_value(data, IT87_REG_FAN_MIN[nr],
1182                         data->fan_min[nr] & 0xff);
1183        it87_write_value(data, IT87_REG_FANX_MIN[nr],
1184                         data->fan_min[nr] >> 8);
1185        mutex_unlock(&data->update_lock);
1186        return count;
1187}
1188
1189/*
1190 * We want to use the same sysfs file names as 8-bit fans, but we need
1191 * different variable names, so we have to use SENSOR_ATTR instead of
1192 * SENSOR_DEVICE_ATTR.
1193 */
1194#define show_fan16_offset(offset) \
1195static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1196        = SENSOR_ATTR(fan##offset##_input, S_IRUGO,             \
1197                show_fan16, NULL, offset - 1);                  \
1198static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1199        = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,     \
1200                show_fan16_min, set_fan16_min, offset - 1)
1201
1202show_fan16_offset(1);
1203show_fan16_offset(2);
1204show_fan16_offset(3);
1205show_fan16_offset(4);
1206show_fan16_offset(5);
1207
1208/* Alarms */
1209static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1210                char *buf)
1211{
1212        struct it87_data *data = it87_update_device(dev);
1213        return sprintf(buf, "%u\n", data->alarms);
1214}
1215static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1216
1217static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1218                char *buf)
1219{
1220        int bitnr = to_sensor_dev_attr(attr)->index;
1221        struct it87_data *data = it87_update_device(dev);
1222        return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1223}
1224
1225static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1226                *attr, const char *buf, size_t count)
1227{
1228        struct it87_data *data = dev_get_drvdata(dev);
1229        long val;
1230        int config;
1231
1232        if (kstrtol(buf, 10, &val) < 0 || val != 0)
1233                return -EINVAL;
1234
1235        mutex_lock(&data->update_lock);
1236        config = it87_read_value(data, IT87_REG_CONFIG);
1237        if (config < 0) {
1238                count = config;
1239        } else {
1240                config |= 1 << 5;
1241                it87_write_value(data, IT87_REG_CONFIG, config);
1242                /* Invalidate cache to force re-read */
1243                data->valid = 0;
1244        }
1245        mutex_unlock(&data->update_lock);
1246
1247        return count;
1248}
1249
1250static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1251static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1252static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1253static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1254static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1255static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1256static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1257static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1258static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1259static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1260static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1261static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1262static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1263static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1264static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1265static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1266static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1267                          show_alarm, clear_intrusion, 4);
1268
1269static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1270                char *buf)
1271{
1272        int bitnr = to_sensor_dev_attr(attr)->index;
1273        struct it87_data *data = it87_update_device(dev);
1274        return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1275}
1276static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1277                const char *buf, size_t count)
1278{
1279        int bitnr = to_sensor_dev_attr(attr)->index;
1280        struct it87_data *data = dev_get_drvdata(dev);
1281        long val;
1282
1283        if (kstrtol(buf, 10, &val) < 0
1284         || (val != 0 && val != 1))
1285                return -EINVAL;
1286
1287        mutex_lock(&data->update_lock);
1288        data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1289        if (val)
1290                data->beeps |= (1 << bitnr);
1291        else
1292                data->beeps &= ~(1 << bitnr);
1293        it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1294        mutex_unlock(&data->update_lock);
1295        return count;
1296}
1297
1298static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1299                          show_beep, set_beep, 1);
1300static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1301static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1302static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1303static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1304static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1305static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1306static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1307/* fanX_beep writability is set later */
1308static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1309static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1310static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1311static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1312static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1313static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1314                          show_beep, set_beep, 2);
1315static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1316static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1317
1318static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1319                char *buf)
1320{
1321        struct it87_data *data = dev_get_drvdata(dev);
1322        return sprintf(buf, "%u\n", data->vrm);
1323}
1324static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1325                const char *buf, size_t count)
1326{
1327        struct it87_data *data = dev_get_drvdata(dev);
1328        unsigned long val;
1329
1330        if (kstrtoul(buf, 10, &val) < 0)
1331                return -EINVAL;
1332
1333        data->vrm = val;
1334
1335        return count;
1336}
1337static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1338
1339static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1340                char *buf)
1341{
1342        struct it87_data *data = it87_update_device(dev);
1343        return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1344}
1345static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1346
1347static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1348                char *buf)
1349{
1350        static const char * const labels[] = {
1351                "+5V",
1352                "5VSB",
1353                "Vbat",
1354        };
1355        static const char * const labels_it8721[] = {
1356                "+3.3V",
1357                "3VSB",
1358                "Vbat",
1359        };
1360        struct it87_data *data = dev_get_drvdata(dev);
1361        int nr = to_sensor_dev_attr(attr)->index;
1362
1363        return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1364                                                       : labels[nr]);
1365}
1366static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1367static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1368static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1369
1370static ssize_t show_name(struct device *dev, struct device_attribute
1371                         *devattr, char *buf)
1372{
1373        struct it87_data *data = dev_get_drvdata(dev);
1374        return sprintf(buf, "%s\n", data->name);
1375}
1376static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1377
1378static struct attribute *it87_attributes_in[9][5] = {
1379{
1380        &sensor_dev_attr_in0_input.dev_attr.attr,
1381        &sensor_dev_attr_in0_min.dev_attr.attr,
1382        &sensor_dev_attr_in0_max.dev_attr.attr,
1383        &sensor_dev_attr_in0_alarm.dev_attr.attr,
1384        NULL
1385}, {
1386        &sensor_dev_attr_in1_input.dev_attr.attr,
1387        &sensor_dev_attr_in1_min.dev_attr.attr,
1388        &sensor_dev_attr_in1_max.dev_attr.attr,
1389        &sensor_dev_attr_in1_alarm.dev_attr.attr,
1390        NULL
1391}, {
1392        &sensor_dev_attr_in2_input.dev_attr.attr,
1393        &sensor_dev_attr_in2_min.dev_attr.attr,
1394        &sensor_dev_attr_in2_max.dev_attr.attr,
1395        &sensor_dev_attr_in2_alarm.dev_attr.attr,
1396        NULL
1397}, {
1398        &sensor_dev_attr_in3_input.dev_attr.attr,
1399        &sensor_dev_attr_in3_min.dev_attr.attr,
1400        &sensor_dev_attr_in3_max.dev_attr.attr,
1401        &sensor_dev_attr_in3_alarm.dev_attr.attr,
1402        NULL
1403}, {
1404        &sensor_dev_attr_in4_input.dev_attr.attr,
1405        &sensor_dev_attr_in4_min.dev_attr.attr,
1406        &sensor_dev_attr_in4_max.dev_attr.attr,
1407        &sensor_dev_attr_in4_alarm.dev_attr.attr,
1408        NULL
1409}, {
1410        &sensor_dev_attr_in5_input.dev_attr.attr,
1411        &sensor_dev_attr_in5_min.dev_attr.attr,
1412        &sensor_dev_attr_in5_max.dev_attr.attr,
1413        &sensor_dev_attr_in5_alarm.dev_attr.attr,
1414        NULL
1415}, {
1416        &sensor_dev_attr_in6_input.dev_attr.attr,
1417        &sensor_dev_attr_in6_min.dev_attr.attr,
1418        &sensor_dev_attr_in6_max.dev_attr.attr,
1419        &sensor_dev_attr_in6_alarm.dev_attr.attr,
1420        NULL
1421}, {
1422        &sensor_dev_attr_in7_input.dev_attr.attr,
1423        &sensor_dev_attr_in7_min.dev_attr.attr,
1424        &sensor_dev_attr_in7_max.dev_attr.attr,
1425        &sensor_dev_attr_in7_alarm.dev_attr.attr,
1426        NULL
1427}, {
1428        &sensor_dev_attr_in8_input.dev_attr.attr,
1429        NULL
1430} };
1431
1432static const struct attribute_group it87_group_in[9] = {
1433        { .attrs = it87_attributes_in[0] },
1434        { .attrs = it87_attributes_in[1] },
1435        { .attrs = it87_attributes_in[2] },
1436        { .attrs = it87_attributes_in[3] },
1437        { .attrs = it87_attributes_in[4] },
1438        { .attrs = it87_attributes_in[5] },
1439        { .attrs = it87_attributes_in[6] },
1440        { .attrs = it87_attributes_in[7] },
1441        { .attrs = it87_attributes_in[8] },
1442};
1443
1444static struct attribute *it87_attributes_temp[3][6] = {
1445{
1446        &sensor_dev_attr_temp1_input.dev_attr.attr,
1447        &sensor_dev_attr_temp1_max.dev_attr.attr,
1448        &sensor_dev_attr_temp1_min.dev_attr.attr,
1449        &sensor_dev_attr_temp1_type.dev_attr.attr,
1450        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1451        NULL
1452} , {
1453        &sensor_dev_attr_temp2_input.dev_attr.attr,
1454        &sensor_dev_attr_temp2_max.dev_attr.attr,
1455        &sensor_dev_attr_temp2_min.dev_attr.attr,
1456        &sensor_dev_attr_temp2_type.dev_attr.attr,
1457        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1458        NULL
1459} , {
1460        &sensor_dev_attr_temp3_input.dev_attr.attr,
1461        &sensor_dev_attr_temp3_max.dev_attr.attr,
1462        &sensor_dev_attr_temp3_min.dev_attr.attr,
1463        &sensor_dev_attr_temp3_type.dev_attr.attr,
1464        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1465        NULL
1466} };
1467
1468static const struct attribute_group it87_group_temp[3] = {
1469        { .attrs = it87_attributes_temp[0] },
1470        { .attrs = it87_attributes_temp[1] },
1471        { .attrs = it87_attributes_temp[2] },
1472};
1473
1474static struct attribute *it87_attributes[] = {
1475        &dev_attr_alarms.attr,
1476        &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1477        &dev_attr_name.attr,
1478        NULL
1479};
1480
1481static const struct attribute_group it87_group = {
1482        .attrs = it87_attributes,
1483};
1484
1485static struct attribute *it87_attributes_in_beep[] = {
1486        &sensor_dev_attr_in0_beep.dev_attr.attr,
1487        &sensor_dev_attr_in1_beep.dev_attr.attr,
1488        &sensor_dev_attr_in2_beep.dev_attr.attr,
1489        &sensor_dev_attr_in3_beep.dev_attr.attr,
1490        &sensor_dev_attr_in4_beep.dev_attr.attr,
1491        &sensor_dev_attr_in5_beep.dev_attr.attr,
1492        &sensor_dev_attr_in6_beep.dev_attr.attr,
1493        &sensor_dev_attr_in7_beep.dev_attr.attr,
1494        NULL
1495};
1496
1497static struct attribute *it87_attributes_temp_beep[] = {
1498        &sensor_dev_attr_temp1_beep.dev_attr.attr,
1499        &sensor_dev_attr_temp2_beep.dev_attr.attr,
1500        &sensor_dev_attr_temp3_beep.dev_attr.attr,
1501};
1502
1503static struct attribute *it87_attributes_fan16[5][3+1] = { {
1504        &sensor_dev_attr_fan1_input16.dev_attr.attr,
1505        &sensor_dev_attr_fan1_min16.dev_attr.attr,
1506        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1507        NULL
1508}, {
1509        &sensor_dev_attr_fan2_input16.dev_attr.attr,
1510        &sensor_dev_attr_fan2_min16.dev_attr.attr,
1511        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1512        NULL
1513}, {
1514        &sensor_dev_attr_fan3_input16.dev_attr.attr,
1515        &sensor_dev_attr_fan3_min16.dev_attr.attr,
1516        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1517        NULL
1518}, {
1519        &sensor_dev_attr_fan4_input16.dev_attr.attr,
1520        &sensor_dev_attr_fan4_min16.dev_attr.attr,
1521        &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1522        NULL
1523}, {
1524        &sensor_dev_attr_fan5_input16.dev_attr.attr,
1525        &sensor_dev_attr_fan5_min16.dev_attr.attr,
1526        &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1527        NULL
1528} };
1529
1530static const struct attribute_group it87_group_fan16[5] = {
1531        { .attrs = it87_attributes_fan16[0] },
1532        { .attrs = it87_attributes_fan16[1] },
1533        { .attrs = it87_attributes_fan16[2] },
1534        { .attrs = it87_attributes_fan16[3] },
1535        { .attrs = it87_attributes_fan16[4] },
1536};
1537
1538static struct attribute *it87_attributes_fan[3][4+1] = { {
1539        &sensor_dev_attr_fan1_input.dev_attr.attr,
1540        &sensor_dev_attr_fan1_min.dev_attr.attr,
1541        &sensor_dev_attr_fan1_div.dev_attr.attr,
1542        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1543        NULL
1544}, {
1545        &sensor_dev_attr_fan2_input.dev_attr.attr,
1546        &sensor_dev_attr_fan2_min.dev_attr.attr,
1547        &sensor_dev_attr_fan2_div.dev_attr.attr,
1548        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1549        NULL
1550}, {
1551        &sensor_dev_attr_fan3_input.dev_attr.attr,
1552        &sensor_dev_attr_fan3_min.dev_attr.attr,
1553        &sensor_dev_attr_fan3_div.dev_attr.attr,
1554        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1555        NULL
1556} };
1557
1558static const struct attribute_group it87_group_fan[3] = {
1559        { .attrs = it87_attributes_fan[0] },
1560        { .attrs = it87_attributes_fan[1] },
1561        { .attrs = it87_attributes_fan[2] },
1562};
1563
1564static const struct attribute_group *
1565it87_get_fan_group(const struct it87_data *data)
1566{
1567        return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1568}
1569
1570static struct attribute *it87_attributes_pwm[3][4+1] = { {
1571        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1572        &sensor_dev_attr_pwm1.dev_attr.attr,
1573        &dev_attr_pwm1_freq.attr,
1574        &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1575        NULL
1576}, {
1577        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1578        &sensor_dev_attr_pwm2.dev_attr.attr,
1579        &dev_attr_pwm2_freq.attr,
1580        &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1581        NULL
1582}, {
1583        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1584        &sensor_dev_attr_pwm3.dev_attr.attr,
1585        &dev_attr_pwm3_freq.attr,
1586        &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1587        NULL
1588} };
1589
1590static const struct attribute_group it87_group_pwm[3] = {
1591        { .attrs = it87_attributes_pwm[0] },
1592        { .attrs = it87_attributes_pwm[1] },
1593        { .attrs = it87_attributes_pwm[2] },
1594};
1595
1596static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1597        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1598        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1599        &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1600        &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1601        &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1602        &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1603        &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1604        &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1605        &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1606        NULL
1607}, {
1608        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1609        &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1610        &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1611        &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1612        &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1613        &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1614        &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1615        &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1616        &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1617        NULL
1618}, {
1619        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1620        &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1621        &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1622        &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1623        &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1624        &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1625        &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1626        &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1627        &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1628        NULL
1629} };
1630
1631static const struct attribute_group it87_group_autopwm[3] = {
1632        { .attrs = it87_attributes_autopwm[0] },
1633        { .attrs = it87_attributes_autopwm[1] },
1634        { .attrs = it87_attributes_autopwm[2] },
1635};
1636
1637static struct attribute *it87_attributes_fan_beep[] = {
1638        &sensor_dev_attr_fan1_beep.dev_attr.attr,
1639        &sensor_dev_attr_fan2_beep.dev_attr.attr,
1640        &sensor_dev_attr_fan3_beep.dev_attr.attr,
1641        &sensor_dev_attr_fan4_beep.dev_attr.attr,
1642        &sensor_dev_attr_fan5_beep.dev_attr.attr,
1643};
1644
1645static struct attribute *it87_attributes_vid[] = {
1646        &dev_attr_vrm.attr,
1647        &dev_attr_cpu0_vid.attr,
1648        NULL
1649};
1650
1651static const struct attribute_group it87_group_vid = {
1652        .attrs = it87_attributes_vid,
1653};
1654
1655static struct attribute *it87_attributes_label[] = {
1656        &sensor_dev_attr_in3_label.dev_attr.attr,
1657        &sensor_dev_attr_in7_label.dev_attr.attr,
1658        &sensor_dev_attr_in8_label.dev_attr.attr,
1659        NULL
1660};
1661
1662static const struct attribute_group it87_group_label = {
1663        .attrs = it87_attributes_label,
1664};
1665
1666/* SuperIO detection - will change isa_address if a chip is found */
1667static int __init it87_find(unsigned short *address,
1668        struct it87_sio_data *sio_data)
1669{
1670        int err;
1671        u16 chip_type;
1672        const char *board_vendor, *board_name;
1673
1674        err = superio_enter();
1675        if (err)
1676                return err;
1677
1678        err = -ENODEV;
1679        chip_type = force_id ? force_id : superio_inw(DEVID);
1680
1681        switch (chip_type) {
1682        case IT8705F_DEVID:
1683                sio_data->type = it87;
1684                break;
1685        case IT8712F_DEVID:
1686                sio_data->type = it8712;
1687                break;
1688        case IT8716F_DEVID:
1689        case IT8726F_DEVID:
1690                sio_data->type = it8716;
1691                break;
1692        case IT8718F_DEVID:
1693                sio_data->type = it8718;
1694                break;
1695        case IT8720F_DEVID:
1696                sio_data->type = it8720;
1697                break;
1698        case IT8721F_DEVID:
1699                sio_data->type = it8721;
1700                break;
1701        case IT8728F_DEVID:
1702                sio_data->type = it8728;
1703                break;
1704        case IT8782F_DEVID:
1705                sio_data->type = it8782;
1706                break;
1707        case IT8783E_DEVID:
1708                sio_data->type = it8783;
1709                break;
1710        case 0xffff:    /* No device at all */
1711                goto exit;
1712        default:
1713                pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1714                goto exit;
1715        }
1716
1717        superio_select(PME);
1718        if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1719                pr_info("Device not activated, skipping\n");
1720                goto exit;
1721        }
1722
1723        *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1724        if (*address == 0) {
1725                pr_info("Base address not set, skipping\n");
1726                goto exit;
1727        }
1728
1729        err = 0;
1730        sio_data->revision = superio_inb(DEVREV) & 0x0f;
1731        pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1732                chip_type, *address, sio_data->revision);
1733
1734        /* in8 (Vbat) is always internal */
1735        sio_data->internal = (1 << 2);
1736
1737        /* Read GPIO config and VID value from LDN 7 (GPIO) */
1738        if (sio_data->type == it87) {
1739                /* The IT8705F doesn't have VID pins at all */
1740                sio_data->skip_vid = 1;
1741
1742                /* The IT8705F has a different LD number for GPIO */
1743                superio_select(5);
1744                sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1745        } else if (sio_data->type == it8783) {
1746                int reg25, reg27, reg2A, reg2C, regEF;
1747
1748                sio_data->skip_vid = 1; /* No VID */
1749
1750                superio_select(GPIO);
1751
1752                reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1753                reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1754                reg2A = superio_inb(IT87_SIO_PINX1_REG);
1755                reg2C = superio_inb(IT87_SIO_PINX2_REG);
1756                regEF = superio_inb(IT87_SIO_SPI_REG);
1757
1758                /* Check if fan3 is there or not */
1759                if ((reg27 & (1 << 0)) || !(reg2C & (1 << 2)))
1760                        sio_data->skip_fan |= (1 << 2);
1761                if ((reg25 & (1 << 4))
1762                    || (!(reg2A & (1 << 1)) && (regEF & (1 << 0))))
1763                        sio_data->skip_pwm |= (1 << 2);
1764
1765                /* Check if fan2 is there or not */
1766                if (reg27 & (1 << 7))
1767                        sio_data->skip_fan |= (1 << 1);
1768                if (reg27 & (1 << 3))
1769                        sio_data->skip_pwm |= (1 << 1);
1770
1771                /* VIN5 */
1772                if ((reg27 & (1 << 0)) || (reg2C & (1 << 2)))
1773                        sio_data->skip_in |= (1 << 5); /* No VIN5 */
1774
1775                /* VIN6 */
1776                if (reg27 & (1 << 1))
1777                        sio_data->skip_in |= (1 << 6); /* No VIN6 */
1778
1779                /*
1780                 * VIN7
1781                 * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1782                 */
1783                if (reg27 & (1 << 2)) {
1784                        /*
1785                         * The data sheet is a bit unclear regarding the
1786                         * internal voltage divider for VCCH5V. It says
1787                         * "This bit enables and switches VIN7 (pin 91) to the
1788                         * internal voltage divider for VCCH5V".
1789                         * This is different to other chips, where the internal
1790                         * voltage divider would connect VIN7 to an internal
1791                         * voltage source. Maybe that is the case here as well.
1792                         *
1793                         * Since we don't know for sure, re-route it if that is
1794                         * not the case, and ask the user to report if the
1795                         * resulting voltage is sane.
1796                         */
1797                        if (!(reg2C & (1 << 1))) {
1798                                reg2C |= (1 << 1);
1799                                superio_outb(IT87_SIO_PINX2_REG, reg2C);
1800                                pr_notice("Routing internal VCCH5V to in7.\n");
1801                        }
1802                        pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1803                        pr_notice("Please report if it displays a reasonable voltage.\n");
1804                }
1805
1806                if (reg2C & (1 << 0))
1807                        sio_data->internal |= (1 << 0);
1808                if (reg2C & (1 << 1))
1809                        sio_data->internal |= (1 << 1);
1810
1811                sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1812
1813        } else {
1814                int reg;
1815                bool uart6;
1816
1817                superio_select(GPIO);
1818
1819                reg = superio_inb(IT87_SIO_GPIO3_REG);
1820                if (sio_data->type == it8721 || sio_data->type == it8728 ||
1821                    sio_data->type == it8782) {
1822                        /*
1823                         * IT8721F/IT8758E, and IT8782F don't have VID pins
1824                         * at all, not sure about the IT8728F.
1825                         */
1826                        sio_data->skip_vid = 1;
1827                } else {
1828                        /* We need at least 4 VID pins */
1829                        if (reg & 0x0f) {
1830                                pr_info("VID is disabled (pins used for GPIO)\n");
1831                                sio_data->skip_vid = 1;
1832                        }
1833                }
1834
1835                /* Check if fan3 is there or not */
1836                if (reg & (1 << 6))
1837                        sio_data->skip_pwm |= (1 << 2);
1838                if (reg & (1 << 7))
1839                        sio_data->skip_fan |= (1 << 2);
1840
1841                /* Check if fan2 is there or not */
1842                reg = superio_inb(IT87_SIO_GPIO5_REG);
1843                if (reg & (1 << 1))
1844                        sio_data->skip_pwm |= (1 << 1);
1845                if (reg & (1 << 2))
1846                        sio_data->skip_fan |= (1 << 1);
1847
1848                if ((sio_data->type == it8718 || sio_data->type == it8720)
1849                 && !(sio_data->skip_vid))
1850                        sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1851
1852                reg = superio_inb(IT87_SIO_PINX2_REG);
1853
1854                uart6 = sio_data->type == it8782 && (reg & (1 << 2));
1855
1856                /*
1857                 * The IT8720F has no VIN7 pin, so VCCH should always be
1858                 * routed internally to VIN7 with an internal divider.
1859                 * Curiously, there still is a configuration bit to control
1860                 * this, which means it can be set incorrectly. And even
1861                 * more curiously, many boards out there are improperly
1862                 * configured, even though the IT8720F datasheet claims
1863                 * that the internal routing of VCCH to VIN7 is the default
1864                 * setting. So we force the internal routing in this case.
1865                 *
1866                 * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1867                 * If UART6 is enabled, re-route VIN7 to the internal divider
1868                 * if that is not already the case.
1869                 */
1870                if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
1871                        reg |= (1 << 1);
1872                        superio_outb(IT87_SIO_PINX2_REG, reg);
1873                        pr_notice("Routing internal VCCH to in7\n");
1874                }
1875                if (reg & (1 << 0))
1876                        sio_data->internal |= (1 << 0);
1877                if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1878                    sio_data->type == it8728)
1879                        sio_data->internal |= (1 << 1);
1880
1881                /*
1882                 * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
1883                 * While VIN7 can be routed to the internal voltage divider,
1884                 * VIN5 and VIN6 are not available if UART6 is enabled.
1885                 *
1886                 * Also, temp3 is not available if UART6 is enabled and TEMPIN3
1887                 * is the temperature source. Since we can not read the
1888                 * temperature source here, skip_temp is preliminary.
1889                 */
1890                if (uart6) {
1891                        sio_data->skip_in |= (1 << 5) | (1 << 6);
1892                        sio_data->skip_temp |= (1 << 2);
1893                }
1894
1895                sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1896        }
1897        if (sio_data->beep_pin)
1898                pr_info("Beeping is supported\n");
1899
1900        /* Disable specific features based on DMI strings */
1901        board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1902        board_name = dmi_get_system_info(DMI_BOARD_NAME);
1903        if (board_vendor && board_name) {
1904                if (strcmp(board_vendor, "nVIDIA") == 0
1905                 && strcmp(board_name, "FN68PT") == 0) {
1906                        /*
1907                         * On the Shuttle SN68PT, FAN_CTL2 is apparently not
1908                         * connected to a fan, but to something else. One user
1909                         * has reported instant system power-off when changing
1910                         * the PWM2 duty cycle, so we disable it.
1911                         * I use the board name string as the trigger in case
1912                         * the same board is ever used in other systems.
1913                         */
1914                        pr_info("Disabling pwm2 due to hardware constraints\n");
1915                        sio_data->skip_pwm = (1 << 1);
1916                }
1917        }
1918
1919exit:
1920        superio_exit();
1921        return err;
1922}
1923
1924static void it87_remove_files(struct device *dev)
1925{
1926        struct it87_data *data = platform_get_drvdata(pdev);
1927        struct it87_sio_data *sio_data = dev->platform_data;
1928        const struct attribute_group *fan_group = it87_get_fan_group(data);
1929        int i;
1930
1931        sysfs_remove_group(&dev->kobj, &it87_group);
1932        for (i = 0; i < 9; i++) {
1933                if (sio_data->skip_in & (1 << i))
1934                        continue;
1935                sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
1936                if (it87_attributes_in_beep[i])
1937                        sysfs_remove_file(&dev->kobj,
1938                                          it87_attributes_in_beep[i]);
1939        }
1940        for (i = 0; i < 3; i++) {
1941                if (!(data->has_temp & (1 << i)))
1942                        continue;
1943                sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
1944                if (sio_data->beep_pin)
1945                        sysfs_remove_file(&dev->kobj,
1946                                          it87_attributes_temp_beep[i]);
1947        }
1948        for (i = 0; i < 5; i++) {
1949                if (!(data->has_fan & (1 << i)))
1950                        continue;
1951                sysfs_remove_group(&dev->kobj, &fan_group[i]);
1952                if (sio_data->beep_pin)
1953                        sysfs_remove_file(&dev->kobj,
1954                                          it87_attributes_fan_beep[i]);
1955        }
1956        for (i = 0; i < 3; i++) {
1957                if (sio_data->skip_pwm & (1 << 0))
1958                        continue;
1959                sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1960                if (has_old_autopwm(data))
1961                        sysfs_remove_group(&dev->kobj,
1962                                           &it87_group_autopwm[i]);
1963        }
1964        if (!sio_data->skip_vid)
1965                sysfs_remove_group(&dev->kobj, &it87_group_vid);
1966        sysfs_remove_group(&dev->kobj, &it87_group_label);
1967}
1968
1969static int __devinit it87_probe(struct platform_device *pdev)
1970{
1971        struct it87_data *data;
1972        struct resource *res;
1973        struct device *dev = &pdev->dev;
1974        struct it87_sio_data *sio_data = dev->platform_data;
1975        const struct attribute_group *fan_group;
1976        int err = 0, i;
1977        int enable_pwm_interface;
1978        int fan_beep_need_rw;
1979        static const char * const names[] = {
1980                "it87",
1981                "it8712",
1982                "it8716",
1983                "it8718",
1984                "it8720",
1985                "it8721",
1986                "it8728",
1987                "it8782",
1988                "it8783",
1989        };
1990
1991        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1992        if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
1993                                 DRVNAME)) {
1994                dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1995                        (unsigned long)res->start,
1996                        (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1997                return -EBUSY;
1998        }
1999
2000        data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2001        if (!data)
2002                return -ENOMEM;
2003
2004        data->addr = res->start;
2005        data->type = sio_data->type;
2006        data->revision = sio_data->revision;
2007        data->name = names[sio_data->type];
2008
2009        /* Now, we do the remaining detection. */
2010        if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2011         || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2012                return -ENODEV;
2013
2014        platform_set_drvdata(pdev, data);
2015
2016        mutex_init(&data->update_lock);
2017
2018        /* Check PWM configuration */
2019        enable_pwm_interface = it87_check_pwm(dev);
2020
2021        /* Starting with IT8721F, we handle scaling of internal voltages */
2022        if (has_12mv_adc(data)) {
2023                if (sio_data->internal & (1 << 0))
2024                        data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2025                if (sio_data->internal & (1 << 1))
2026                        data->in_scaled |= (1 << 7);    /* in7 is VSB */
2027                if (sio_data->internal & (1 << 2))
2028                        data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2029        } else if (sio_data->type == it8782 || sio_data->type == it8783) {
2030                if (sio_data->internal & (1 << 0))
2031                        data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2032                if (sio_data->internal & (1 << 1))
2033                        data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2034        }
2035
2036        data->has_temp = 0x07;
2037        if (sio_data->skip_temp & (1 << 2)) {
2038                if (sio_data->type == it8782
2039                    && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2040                        data->has_temp &= ~(1 << 2);
2041        }
2042
2043        /* Initialize the IT87 chip */
2044        it87_init_device(pdev);
2045
2046        /* Register sysfs hooks */
2047        err = sysfs_create_group(&dev->kobj, &it87_group);
2048        if (err)
2049                return err;
2050
2051        for (i = 0; i < 9; i++) {
2052                if (sio_data->skip_in & (1 << i))
2053                        continue;
2054                err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2055                if (err)
2056                        goto error;
2057                if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2058                        err = sysfs_create_file(&dev->kobj,
2059                                                it87_attributes_in_beep[i]);
2060                        if (err)
2061                                goto error;
2062                }
2063        }
2064
2065        for (i = 0; i < 3; i++) {
2066                if (!(data->has_temp & (1 << i)))
2067                        continue;
2068                err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2069                if (err)
2070                        goto error;
2071                if (sio_data->beep_pin) {
2072                        err = sysfs_create_file(&dev->kobj,
2073                                                it87_attributes_temp_beep[i]);
2074                        if (err)
2075                                goto error;
2076                }
2077        }
2078
2079        /* Do not create fan files for disabled fans */
2080        fan_group = it87_get_fan_group(data);
2081        fan_beep_need_rw = 1;
2082        for (i = 0; i < 5; i++) {
2083                if (!(data->has_fan & (1 << i)))
2084                        continue;
2085                err = sysfs_create_group(&dev->kobj, &fan_group[i]);
2086                if (err)
2087                        goto error;
2088
2089                if (sio_data->beep_pin) {
2090                        err = sysfs_create_file(&dev->kobj,
2091                                                it87_attributes_fan_beep[i]);
2092                        if (err)
2093                                goto error;
2094                        if (!fan_beep_need_rw)
2095                                continue;
2096
2097                        /*
2098                         * As we have a single beep enable bit for all fans,
2099                         * only the first enabled fan has a writable attribute
2100                         * for it.
2101                         */
2102                        if (sysfs_chmod_file(&dev->kobj,
2103                                             it87_attributes_fan_beep[i],
2104                                             S_IRUGO | S_IWUSR))
2105                                dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2106                                        i + 1);
2107                        fan_beep_need_rw = 0;
2108                }
2109        }
2110
2111        if (enable_pwm_interface) {
2112                for (i = 0; i < 3; i++) {
2113                        if (sio_data->skip_pwm & (1 << i))
2114                                continue;
2115                        err = sysfs_create_group(&dev->kobj,
2116                                                 &it87_group_pwm[i]);
2117                        if (err)
2118                                goto error;
2119
2120                        if (!has_old_autopwm(data))
2121                                continue;
2122                        err = sysfs_create_group(&dev->kobj,
2123                                                 &it87_group_autopwm[i]);
2124                        if (err)
2125                                goto error;
2126                }
2127        }
2128
2129        if (!sio_data->skip_vid) {
2130                data->vrm = vid_which_vrm();
2131                /* VID reading from Super-I/O config space if available */
2132                data->vid = sio_data->vid_value;
2133                err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2134                if (err)
2135                        goto error;
2136        }
2137
2138        /* Export labels for internal sensors */
2139        for (i = 0; i < 3; i++) {
2140                if (!(sio_data->internal & (1 << i)))
2141                        continue;
2142                err = sysfs_create_file(&dev->kobj,
2143                                        it87_attributes_label[i]);
2144                if (err)
2145                        goto error;
2146        }
2147
2148        data->hwmon_dev = hwmon_device_register(dev);
2149        if (IS_ERR(data->hwmon_dev)) {
2150                err = PTR_ERR(data->hwmon_dev);
2151                goto error;
2152        }
2153
2154        return 0;
2155
2156error:
2157        it87_remove_files(dev);
2158        return err;
2159}
2160
2161static int __devexit it87_remove(struct platform_device *pdev)
2162{
2163        struct it87_data *data = platform_get_drvdata(pdev);
2164
2165        hwmon_device_unregister(data->hwmon_dev);
2166        it87_remove_files(&pdev->dev);
2167
2168        return 0;
2169}
2170
2171/*
2172 * Must be called with data->update_lock held, except during initialization.
2173 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2174 * would slow down the IT87 access and should not be necessary.
2175 */
2176static int it87_read_value(struct it87_data *data, u8 reg)
2177{
2178        outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2179        return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2180}
2181
2182/*
2183 * Must be called with data->update_lock held, except during initialization.
2184 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2185 * would slow down the IT87 access and should not be necessary.
2186 */
2187static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2188{
2189        outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2190        outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2191}
2192
2193/* Return 1 if and only if the PWM interface is safe to use */
2194static int __devinit it87_check_pwm(struct device *dev)
2195{
2196        struct it87_data *data = dev_get_drvdata(dev);
2197        /*
2198         * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2199         * and polarity set to active low is sign that this is the case so we
2200         * disable pwm control to protect the user.
2201         */
2202        int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2203        if ((tmp & 0x87) == 0) {
2204                if (fix_pwm_polarity) {
2205                        /*
2206                         * The user asks us to attempt a chip reconfiguration.
2207                         * This means switching to active high polarity and
2208                         * inverting all fan speed values.
2209                         */
2210                        int i;
2211                        u8 pwm[3];
2212
2213                        for (i = 0; i < 3; i++)
2214                                pwm[i] = it87_read_value(data,
2215                                                         IT87_REG_PWM(i));
2216
2217                        /*
2218                         * If any fan is in automatic pwm mode, the polarity
2219                         * might be correct, as suspicious as it seems, so we
2220                         * better don't change anything (but still disable the
2221                         * PWM interface).
2222                         */
2223                        if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2224                                dev_info(dev, "Reconfiguring PWM to "
2225                                         "active high polarity\n");
2226                                it87_write_value(data, IT87_REG_FAN_CTL,
2227                                                 tmp | 0x87);
2228                                for (i = 0; i < 3; i++)
2229                                        it87_write_value(data,
2230                                                         IT87_REG_PWM(i),
2231                                                         0x7f & ~pwm[i]);
2232                                return 1;
2233                        }
2234
2235                        dev_info(dev, "PWM configuration is "
2236                                 "too broken to be fixed\n");
2237                }
2238
2239                dev_info(dev, "Detected broken BIOS "
2240                         "defaults, disabling PWM interface\n");
2241                return 0;
2242        } else if (fix_pwm_polarity) {
2243                dev_info(dev, "PWM configuration looks "
2244                         "sane, won't touch\n");
2245        }
2246
2247        return 1;
2248}
2249
2250/* Called when we have found a new IT87. */
2251static void __devinit it87_init_device(struct platform_device *pdev)
2252{
2253        struct it87_sio_data *sio_data = pdev->dev.platform_data;
2254        struct it87_data *data = platform_get_drvdata(pdev);
2255        int tmp, i;
2256        u8 mask;
2257
2258        /*
2259         * For each PWM channel:
2260         * - If it is in automatic mode, setting to manual mode should set
2261         *   the fan to full speed by default.
2262         * - If it is in manual mode, we need a mapping to temperature
2263         *   channels to use when later setting to automatic mode later.
2264         *   Use a 1:1 mapping by default (we are clueless.)
2265         * In both cases, the value can (and should) be changed by the user
2266         * prior to switching to a different mode.
2267         * Note that this is no longer needed for the IT8721F and later, as
2268         * these have separate registers for the temperature mapping and the
2269         * manual duty cycle.
2270         */
2271        for (i = 0; i < 3; i++) {
2272                data->pwm_temp_map[i] = i;
2273                data->pwm_duty[i] = 0x7f;       /* Full speed */
2274                data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2275        }
2276
2277        /*
2278         * Some chips seem to have default value 0xff for all limit
2279         * registers. For low voltage limits it makes no sense and triggers
2280         * alarms, so change to 0 instead. For high temperature limits, it
2281         * means -1 degree C, which surprisingly doesn't trigger an alarm,
2282         * but is still confusing, so change to 127 degrees C.
2283         */
2284        for (i = 0; i < 8; i++) {
2285                tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2286                if (tmp == 0xff)
2287                        it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2288        }
2289        for (i = 0; i < 3; i++) {
2290                tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2291                if (tmp == 0xff)
2292                        it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2293        }
2294
2295        /*
2296         * Temperature channels are not forcibly enabled, as they can be
2297         * set to two different sensor types and we can't guess which one
2298         * is correct for a given system. These channels can be enabled at
2299         * run-time through the temp{1-3}_type sysfs accessors if needed.
2300         */
2301
2302        /* Check if voltage monitors are reset manually or by some reason */
2303        tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2304        if ((tmp & 0xff) == 0) {
2305                /* Enable all voltage monitors */
2306                it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2307        }
2308
2309        /* Check if tachometers are reset manually or by some reason */
2310        mask = 0x70 & ~(sio_data->skip_fan << 4);
2311        data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2312        if ((data->fan_main_ctrl & mask) == 0) {
2313                /* Enable all fan tachometers */
2314                data->fan_main_ctrl |= mask;
2315                it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2316                                 data->fan_main_ctrl);
2317        }
2318        data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2319
2320        /* Set tachometers to 16-bit mode if needed */
2321        if (has_16bit_fans(data)) {
2322                tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2323                if (~tmp & 0x07 & data->has_fan) {
2324                        dev_dbg(&pdev->dev,
2325                                "Setting fan1-3 to 16-bit mode\n");
2326                        it87_write_value(data, IT87_REG_FAN_16BIT,
2327                                         tmp | 0x07);
2328                }
2329                /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
2330                if (data->type != it87 && data->type != it8782 &&
2331                    data->type != it8783) {
2332                        if (tmp & (1 << 4))
2333                                data->has_fan |= (1 << 3); /* fan4 enabled */
2334                        if (tmp & (1 << 5))
2335                                data->has_fan |= (1 << 4); /* fan5 enabled */
2336                }
2337        }
2338
2339        /* Fan input pins may be used for alternative functions */
2340        data->has_fan &= ~sio_data->skip_fan;
2341
2342        /* Start monitoring */
2343        it87_write_value(data, IT87_REG_CONFIG,
2344                         (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2345                         | (update_vbat ? 0x41 : 0x01));
2346}
2347
2348static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2349{
2350        data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2351        if (has_newer_autopwm(data)) {
2352                data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2353                data->pwm_duty[nr] = it87_read_value(data,
2354                                                     IT87_REG_PWM_DUTY(nr));
2355        } else {
2356                if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2357                        data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2358                else                            /* Manual mode */
2359                        data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2360        }
2361
2362        if (has_old_autopwm(data)) {
2363                int i;
2364
2365                for (i = 0; i < 5 ; i++)
2366                        data->auto_temp[nr][i] = it87_read_value(data,
2367                                                IT87_REG_AUTO_TEMP(nr, i));
2368                for (i = 0; i < 3 ; i++)
2369                        data->auto_pwm[nr][i] = it87_read_value(data,
2370                                                IT87_REG_AUTO_PWM(nr, i));
2371        }
2372}
2373
2374static struct it87_data *it87_update_device(struct device *dev)
2375{
2376        struct it87_data *data = dev_get_drvdata(dev);
2377        int i;
2378
2379        mutex_lock(&data->update_lock);
2380
2381        if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2382            || !data->valid) {
2383                if (update_vbat) {
2384                        /*
2385                         * Cleared after each update, so reenable.  Value
2386                         * returned by this read will be previous value
2387                         */
2388                        it87_write_value(data, IT87_REG_CONFIG,
2389                                it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2390                }
2391                for (i = 0; i <= 7; i++) {
2392                        data->in[i] =
2393                                it87_read_value(data, IT87_REG_VIN(i));
2394                        data->in_min[i] =
2395                                it87_read_value(data, IT87_REG_VIN_MIN(i));
2396                        data->in_max[i] =
2397                                it87_read_value(data, IT87_REG_VIN_MAX(i));
2398                }
2399                /* in8 (battery) has no limit registers */
2400                data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
2401
2402                for (i = 0; i < 5; i++) {
2403                        /* Skip disabled fans */
2404                        if (!(data->has_fan & (1 << i)))
2405                                continue;
2406
2407                        data->fan_min[i] =
2408                                it87_read_value(data, IT87_REG_FAN_MIN[i]);
2409                        data->fan[i] = it87_read_value(data,
2410                                       IT87_REG_FAN[i]);
2411                        /* Add high byte if in 16-bit mode */
2412                        if (has_16bit_fans(data)) {
2413                                data->fan[i] |= it87_read_value(data,
2414                                                IT87_REG_FANX[i]) << 8;
2415                                data->fan_min[i] |= it87_read_value(data,
2416                                                IT87_REG_FANX_MIN[i]) << 8;
2417                        }
2418                }
2419                for (i = 0; i < 3; i++) {
2420                        if (!(data->has_temp & (1 << i)))
2421                                continue;
2422                        data->temp[i] =
2423                                it87_read_value(data, IT87_REG_TEMP(i));
2424                        data->temp_high[i] =
2425                                it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2426                        data->temp_low[i] =
2427                                it87_read_value(data, IT87_REG_TEMP_LOW(i));
2428                }
2429
2430                /* Newer chips don't have clock dividers */
2431                if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2432                        i = it87_read_value(data, IT87_REG_FAN_DIV);
2433                        data->fan_div[0] = i & 0x07;
2434                        data->fan_div[1] = (i >> 3) & 0x07;
2435                        data->fan_div[2] = (i & 0x40) ? 3 : 1;
2436                }
2437
2438                data->alarms =
2439                        it87_read_value(data, IT87_REG_ALARM1) |
2440                        (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2441                        (it87_read_value(data, IT87_REG_ALARM3) << 16);
2442                data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2443
2444                data->fan_main_ctrl = it87_read_value(data,
2445                                IT87_REG_FAN_MAIN_CTRL);
2446                data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2447                for (i = 0; i < 3; i++)
2448                        it87_update_pwm_ctrl(data, i);
2449
2450                data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2451                /*
2452                 * The IT8705F does not have VID capability.
2453                 * The IT8718F and later don't use IT87_REG_VID for the
2454                 * same purpose.
2455                 */
2456                if (data->type == it8712 || data->type == it8716) {
2457                        data->vid = it87_read_value(data, IT87_REG_VID);
2458                        /*
2459                         * The older IT8712F revisions had only 5 VID pins,
2460                         * but we assume it is always safe to read 6 bits.
2461                         */
2462                        data->vid &= 0x3f;
2463                }
2464                data->last_updated = jiffies;
2465                data->valid = 1;
2466        }
2467
2468        mutex_unlock(&data->update_lock);
2469
2470        return data;
2471}
2472
2473static int __init it87_device_add(unsigned short address,
2474                                  const struct it87_sio_data *sio_data)
2475{
2476        struct resource res = {
2477                .start  = address + IT87_EC_OFFSET,
2478                .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2479                .name   = DRVNAME,
2480                .flags  = IORESOURCE_IO,
2481        };
2482        int err;
2483
2484        err = acpi_check_resource_conflict(&res);
2485        if (err)
2486                goto exit;
2487
2488        pdev = platform_device_alloc(DRVNAME, address);
2489        if (!pdev) {
2490                err = -ENOMEM;
2491                pr_err("Device allocation failed\n");
2492                goto exit;
2493        }
2494
2495        err = platform_device_add_resources(pdev, &res, 1);
2496        if (err) {
2497                pr_err("Device resource addition failed (%d)\n", err);
2498                goto exit_device_put;
2499        }
2500
2501        err = platform_device_add_data(pdev, sio_data,
2502                                       sizeof(struct it87_sio_data));
2503        if (err) {
2504                pr_err("Platform data allocation failed\n");
2505                goto exit_device_put;
2506        }
2507
2508        err = platform_device_add(pdev);
2509        if (err) {
2510                pr_err("Device addition failed (%d)\n", err);
2511                goto exit_device_put;
2512        }
2513
2514        return 0;
2515
2516exit_device_put:
2517        platform_device_put(pdev);
2518exit:
2519        return err;
2520}
2521
2522static int __init sm_it87_init(void)
2523{
2524        int err;
2525        unsigned short isa_address = 0;
2526        struct it87_sio_data sio_data;
2527
2528        memset(&sio_data, 0, sizeof(struct it87_sio_data));
2529        err = it87_find(&isa_address, &sio_data);
2530        if (err)
2531                return err;
2532        err = platform_driver_register(&it87_driver);
2533        if (err)
2534                return err;
2535
2536        err = it87_device_add(isa_address, &sio_data);
2537        if (err) {
2538                platform_driver_unregister(&it87_driver);
2539                return err;
2540        }
2541
2542        return 0;
2543}
2544
2545static void __exit sm_it87_exit(void)
2546{
2547        platform_device_unregister(pdev);
2548        platform_driver_unregister(&it87_driver);
2549}
2550
2551
2552MODULE_AUTHOR("Chris Gauthron, "
2553              "Jean Delvare <khali@linux-fr.org>");
2554MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2555module_param(update_vbat, bool, 0);
2556MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2557module_param(fix_pwm_polarity, bool, 0);
2558MODULE_PARM_DESC(fix_pwm_polarity,
2559                 "Force PWM polarity to active high (DANGEROUS)");
2560MODULE_LICENSE("GPL");
2561
2562module_init(sm_it87_init);
2563module_exit(sm_it87_exit);
2564
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