linux/drivers/hwmon/w83793.c
<<
>>
Prefs
   1/*
   2 * w83793.c - Linux kernel driver for hardware monitoring
   3 * Copyright (C) 2006 Winbond Electronics Corp.
   4 *            Yuan Mu
   5 *            Rudolf Marek <r.marek@assembler.cz>
   6 * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
   7 *              Watchdog driver part
   8 *              (Based partially on fschmd driver,
   9 *               Copyright 2007-2008 by Hans de Goede)
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation - version 2.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program; if not, write to the Free Software
  22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  23 * 02110-1301 USA.
  24 */
  25
  26/*
  27 * Supports following chips:
  28 *
  29 * Chip #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  30 * w83793       10      12      8       6       0x7b    0x5ca3  yes     no
  31 */
  32
  33#include <linux/module.h>
  34#include <linux/init.h>
  35#include <linux/slab.h>
  36#include <linux/i2c.h>
  37#include <linux/hwmon.h>
  38#include <linux/hwmon-vid.h>
  39#include <linux/hwmon-sysfs.h>
  40#include <linux/err.h>
  41#include <linux/mutex.h>
  42#include <linux/fs.h>
  43#include <linux/watchdog.h>
  44#include <linux/miscdevice.h>
  45#include <linux/uaccess.h>
  46#include <linux/kref.h>
  47#include <linux/notifier.h>
  48#include <linux/reboot.h>
  49#include <linux/jiffies.h>
  50
  51/* Default values */
  52#define WATCHDOG_TIMEOUT 2      /* 2 minute default timeout */
  53
  54/* Addresses to scan */
  55static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
  56                                                I2C_CLIENT_END };
  57
  58/* Insmod parameters */
  59
  60static unsigned short force_subclients[4];
  61module_param_array(force_subclients, short, NULL, 0);
  62MODULE_PARM_DESC(force_subclients, "List of subclient addresses: "
  63                       "{bus, clientaddr, subclientaddr1, subclientaddr2}");
  64
  65static bool reset;
  66module_param(reset, bool, 0);
  67MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  68
  69static int timeout = WATCHDOG_TIMEOUT;  /* default timeout in minutes */
  70module_param(timeout, int, 0);
  71MODULE_PARM_DESC(timeout,
  72        "Watchdog timeout in minutes. 2<= timeout <=255 (default="
  73                                __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
  74
  75static bool nowayout = WATCHDOG_NOWAYOUT;
  76module_param(nowayout, bool, 0);
  77MODULE_PARM_DESC(nowayout,
  78        "Watchdog cannot be stopped once started (default="
  79                                __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
  80
  81/*
  82 * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
  83 * as ID, Bank Select registers
  84 */
  85#define W83793_REG_BANKSEL              0x00
  86#define W83793_REG_VENDORID             0x0d
  87#define W83793_REG_CHIPID               0x0e
  88#define W83793_REG_DEVICEID             0x0f
  89
  90#define W83793_REG_CONFIG               0x40
  91#define W83793_REG_MFC                  0x58
  92#define W83793_REG_FANIN_CTRL           0x5c
  93#define W83793_REG_FANIN_SEL            0x5d
  94#define W83793_REG_I2C_ADDR             0x0b
  95#define W83793_REG_I2C_SUBADDR          0x0c
  96#define W83793_REG_VID_INA              0x05
  97#define W83793_REG_VID_INB              0x06
  98#define W83793_REG_VID_LATCHA           0x07
  99#define W83793_REG_VID_LATCHB           0x08
 100#define W83793_REG_VID_CTRL             0x59
 101
 102#define W83793_REG_WDT_LOCK             0x01
 103#define W83793_REG_WDT_ENABLE           0x02
 104#define W83793_REG_WDT_STATUS           0x03
 105#define W83793_REG_WDT_TIMEOUT          0x04
 106
 107static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
 108
 109#define TEMP_READ       0
 110#define TEMP_CRIT       1
 111#define TEMP_CRIT_HYST  2
 112#define TEMP_WARN       3
 113#define TEMP_WARN_HYST  4
 114/*
 115 * only crit and crit_hyst affect real-time alarm status
 116 * current crit crit_hyst warn warn_hyst
 117 */
 118static u16 W83793_REG_TEMP[][5] = {
 119        {0x1c, 0x78, 0x79, 0x7a, 0x7b},
 120        {0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
 121        {0x1e, 0x80, 0x81, 0x82, 0x83},
 122        {0x1f, 0x84, 0x85, 0x86, 0x87},
 123        {0x20, 0x88, 0x89, 0x8a, 0x8b},
 124        {0x21, 0x8c, 0x8d, 0x8e, 0x8f},
 125};
 126
 127#define W83793_REG_TEMP_LOW_BITS        0x22
 128
 129#define W83793_REG_BEEP(index)          (0x53 + (index))
 130#define W83793_REG_ALARM(index)         (0x4b + (index))
 131
 132#define W83793_REG_CLR_CHASSIS          0x4a    /* SMI MASK4 */
 133#define W83793_REG_IRQ_CTRL             0x50
 134#define W83793_REG_OVT_CTRL             0x51
 135#define W83793_REG_OVT_BEEP             0x52
 136
 137#define IN_READ                         0
 138#define IN_MAX                          1
 139#define IN_LOW                          2
 140static const u16 W83793_REG_IN[][3] = {
 141        /* Current, High, Low */
 142        {0x10, 0x60, 0x61},     /* Vcore A      */
 143        {0x11, 0x62, 0x63},     /* Vcore B      */
 144        {0x12, 0x64, 0x65},     /* Vtt          */
 145        {0x14, 0x6a, 0x6b},     /* VSEN1        */
 146        {0x15, 0x6c, 0x6d},     /* VSEN2        */
 147        {0x16, 0x6e, 0x6f},     /* +3VSEN       */
 148        {0x17, 0x70, 0x71},     /* +12VSEN      */
 149        {0x18, 0x72, 0x73},     /* 5VDD         */
 150        {0x19, 0x74, 0x75},     /* 5VSB         */
 151        {0x1a, 0x76, 0x77},     /* VBAT         */
 152};
 153
 154/* Low Bits of Vcore A/B Vtt Read/High/Low */
 155static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
 156static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
 157static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
 158
 159#define W83793_REG_FAN(index)           (0x23 + 2 * (index))    /* High byte */
 160#define W83793_REG_FAN_MIN(index)       (0x90 + 2 * (index))    /* High byte */
 161
 162#define W83793_REG_PWM_DEFAULT          0xb2
 163#define W83793_REG_PWM_ENABLE           0x207
 164#define W83793_REG_PWM_UPTIME           0xc3    /* Unit in 0.1 second */
 165#define W83793_REG_PWM_DOWNTIME         0xc4    /* Unit in 0.1 second */
 166#define W83793_REG_TEMP_CRITICAL        0xc5
 167
 168#define PWM_DUTY                        0
 169#define PWM_START                       1
 170#define PWM_NONSTOP                     2
 171#define PWM_STOP_TIME                   3
 172#define W83793_REG_PWM(index, nr)       (((nr) == 0 ? 0xb3 : \
 173                                         (nr) == 1 ? 0x220 : 0x218) + (index))
 174
 175/* bit field, fan1 is bit0, fan2 is bit1 ... */
 176#define W83793_REG_TEMP_FAN_MAP(index)  (0x201 + (index))
 177#define W83793_REG_TEMP_TOL(index)      (0x208 + (index))
 178#define W83793_REG_TEMP_CRUISE(index)   (0x210 + (index))
 179#define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index))
 180#define W83793_REG_SF2_TEMP(index, nr)  (0x230 + ((index) << 4) + (nr))
 181#define W83793_REG_SF2_PWM(index, nr)   (0x238 + ((index) << 4) + (nr))
 182
 183static inline unsigned long FAN_FROM_REG(u16 val)
 184{
 185        if ((val >= 0xfff) || (val == 0))
 186                return  0;
 187        return 1350000UL / val;
 188}
 189
 190static inline u16 FAN_TO_REG(long rpm)
 191{
 192        if (rpm <= 0)
 193                return 0x0fff;
 194        return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 195}
 196
 197static inline unsigned long TIME_FROM_REG(u8 reg)
 198{
 199        return reg * 100;
 200}
 201
 202static inline u8 TIME_TO_REG(unsigned long val)
 203{
 204        return clamp_val((val + 50) / 100, 0, 0xff);
 205}
 206
 207static inline long TEMP_FROM_REG(s8 reg)
 208{
 209        return reg * 1000;
 210}
 211
 212static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
 213{
 214        return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max);
 215}
 216
 217struct w83793_data {
 218        struct i2c_client *lm75[2];
 219        struct device *hwmon_dev;
 220        struct mutex update_lock;
 221        char valid;                     /* !=0 if following fields are valid */
 222        unsigned long last_updated;     /* In jiffies */
 223        unsigned long last_nonvolatile; /* In jiffies, last time we update the
 224                                         * nonvolatile registers
 225                                         */
 226
 227        u8 bank;
 228        u8 vrm;
 229        u8 vid[2];
 230        u8 in[10][3];           /* Register value, read/high/low */
 231        u8 in_low_bits[3];      /* Additional resolution for VCore A/B Vtt */
 232
 233        u16 has_fan;            /* Only fan1- fan5 has own pins */
 234        u16 fan[12];            /* Register value combine */
 235        u16 fan_min[12];        /* Register value combine */
 236
 237        s8 temp[6][5];          /* current, crit, crit_hyst,warn, warn_hyst */
 238        u8 temp_low_bits;       /* Additional resolution TD1-TD4 */
 239        u8 temp_mode[2];        /* byte 0: Temp D1-D4 mode each has 2 bits
 240                                 * byte 1: Temp R1,R2 mode, each has 1 bit
 241                                 */
 242        u8 temp_critical;       /* If reached all fan will be at full speed */
 243        u8 temp_fan_map[6];     /* Temp controls which pwm fan, bit field */
 244
 245        u8 has_pwm;
 246        u8 has_temp;
 247        u8 has_vid;
 248        u8 pwm_enable;          /* Register value, each Temp has 1 bit */
 249        u8 pwm_uptime;          /* Register value */
 250        u8 pwm_downtime;        /* Register value */
 251        u8 pwm_default;         /* All fan default pwm, next poweron valid */
 252        u8 pwm[8][3];           /* Register value */
 253        u8 pwm_stop_time[8];
 254        u8 temp_cruise[6];
 255
 256        u8 alarms[5];           /* realtime status registers */
 257        u8 beeps[5];
 258        u8 beep_enable;
 259        u8 tolerance[3];        /* Temp tolerance(Smart Fan I/II) */
 260        u8 sf2_pwm[6][7];       /* Smart FanII: Fan duty cycle */
 261        u8 sf2_temp[6][7];      /* Smart FanII: Temp level point */
 262
 263        /* watchdog */
 264        struct i2c_client *client;
 265        struct mutex watchdog_lock;
 266        struct list_head list; /* member of the watchdog_data_list */
 267        struct kref kref;
 268        struct miscdevice watchdog_miscdev;
 269        unsigned long watchdog_is_open;
 270        char watchdog_expect_close;
 271        char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
 272        unsigned int watchdog_caused_reboot;
 273        int watchdog_timeout; /* watchdog timeout in minutes */
 274};
 275
 276/*
 277 * Somewhat ugly :( global data pointer list with all devices, so that
 278 * we can find our device data as when using misc_register. There is no
 279 * other method to get to one's device data from the open file-op and
 280 * for usage in the reboot notifier callback.
 281 */
 282static LIST_HEAD(watchdog_data_list);
 283
 284/* Note this lock not only protect list access, but also data.kref access */
 285static DEFINE_MUTEX(watchdog_data_mutex);
 286
 287/*
 288 * Release our data struct when we're detached from the i2c client *and* all
 289 * references to our watchdog device are released
 290 */
 291static void w83793_release_resources(struct kref *ref)
 292{
 293        struct w83793_data *data = container_of(ref, struct w83793_data, kref);
 294        kfree(data);
 295}
 296
 297static u8 w83793_read_value(struct i2c_client *client, u16 reg);
 298static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
 299static int w83793_probe(struct i2c_client *client,
 300                        const struct i2c_device_id *id);
 301static int w83793_detect(struct i2c_client *client,
 302                         struct i2c_board_info *info);
 303static int w83793_remove(struct i2c_client *client);
 304static void w83793_init_client(struct i2c_client *client);
 305static void w83793_update_nonvolatile(struct device *dev);
 306static struct w83793_data *w83793_update_device(struct device *dev);
 307
 308static const struct i2c_device_id w83793_id[] = {
 309        { "w83793", 0 },
 310        { }
 311};
 312MODULE_DEVICE_TABLE(i2c, w83793_id);
 313
 314static struct i2c_driver w83793_driver = {
 315        .class          = I2C_CLASS_HWMON,
 316        .driver = {
 317                   .name = "w83793",
 318        },
 319        .probe          = w83793_probe,
 320        .remove         = w83793_remove,
 321        .id_table       = w83793_id,
 322        .detect         = w83793_detect,
 323        .address_list   = normal_i2c,
 324};
 325
 326static ssize_t
 327show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
 328{
 329        struct w83793_data *data = dev_get_drvdata(dev);
 330        return sprintf(buf, "%d\n", data->vrm);
 331}
 332
 333static ssize_t
 334show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 335{
 336        struct w83793_data *data = w83793_update_device(dev);
 337        struct sensor_device_attribute_2 *sensor_attr =
 338            to_sensor_dev_attr_2(attr);
 339        int index = sensor_attr->index;
 340
 341        return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
 342}
 343
 344static ssize_t
 345store_vrm(struct device *dev, struct device_attribute *attr,
 346          const char *buf, size_t count)
 347{
 348        struct w83793_data *data = dev_get_drvdata(dev);
 349        unsigned long val;
 350        int err;
 351
 352        err = kstrtoul(buf, 10, &val);
 353        if (err)
 354                return err;
 355
 356        data->vrm = val;
 357        return count;
 358}
 359
 360#define ALARM_STATUS                    0
 361#define BEEP_ENABLE                     1
 362static ssize_t
 363show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 364{
 365        struct w83793_data *data = w83793_update_device(dev);
 366        struct sensor_device_attribute_2 *sensor_attr =
 367            to_sensor_dev_attr_2(attr);
 368        int nr = sensor_attr->nr;
 369        int index = sensor_attr->index >> 3;
 370        int bit = sensor_attr->index & 0x07;
 371        u8 val;
 372
 373        if (nr == ALARM_STATUS) {
 374                val = (data->alarms[index] >> (bit)) & 1;
 375        } else {                /* BEEP_ENABLE */
 376                val = (data->beeps[index] >> (bit)) & 1;
 377        }
 378
 379        return sprintf(buf, "%u\n", val);
 380}
 381
 382static ssize_t
 383store_beep(struct device *dev, struct device_attribute *attr,
 384           const char *buf, size_t count)
 385{
 386        struct i2c_client *client = to_i2c_client(dev);
 387        struct w83793_data *data = i2c_get_clientdata(client);
 388        struct sensor_device_attribute_2 *sensor_attr =
 389            to_sensor_dev_attr_2(attr);
 390        int index = sensor_attr->index >> 3;
 391        int shift = sensor_attr->index & 0x07;
 392        u8 beep_bit = 1 << shift;
 393        unsigned long val;
 394        int err;
 395
 396        err = kstrtoul(buf, 10, &val);
 397        if (err)
 398                return err;
 399
 400        if (val > 1)
 401                return -EINVAL;
 402
 403        mutex_lock(&data->update_lock);
 404        data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
 405        data->beeps[index] &= ~beep_bit;
 406        data->beeps[index] |= val << shift;
 407        w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
 408        mutex_unlock(&data->update_lock);
 409
 410        return count;
 411}
 412
 413static ssize_t
 414show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
 415{
 416        struct w83793_data *data = w83793_update_device(dev);
 417        return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
 418}
 419
 420static ssize_t
 421store_beep_enable(struct device *dev, struct device_attribute *attr,
 422                  const char *buf, size_t count)
 423{
 424        struct i2c_client *client = to_i2c_client(dev);
 425        struct w83793_data *data = i2c_get_clientdata(client);
 426        unsigned long val;
 427        int err;
 428
 429        err = kstrtoul(buf, 10, &val);
 430        if (err)
 431                return err;
 432
 433        if (val > 1)
 434                return -EINVAL;
 435
 436        mutex_lock(&data->update_lock);
 437        data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
 438                            & 0xfd;
 439        data->beep_enable |= val << 1;
 440        w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
 441        mutex_unlock(&data->update_lock);
 442
 443        return count;
 444}
 445
 446/* Write 0 to clear chassis alarm */
 447static ssize_t
 448store_chassis_clear(struct device *dev,
 449                    struct device_attribute *attr, const char *buf,
 450                    size_t count)
 451{
 452        struct i2c_client *client = to_i2c_client(dev);
 453        struct w83793_data *data = i2c_get_clientdata(client);
 454        unsigned long val;
 455        u8 reg;
 456        int err;
 457
 458        err = kstrtoul(buf, 10, &val);
 459        if (err)
 460                return err;
 461        if (val)
 462                return -EINVAL;
 463
 464        mutex_lock(&data->update_lock);
 465        reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 466        w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
 467        data->valid = 0;                /* Force cache refresh */
 468        mutex_unlock(&data->update_lock);
 469        return count;
 470}
 471
 472#define FAN_INPUT                       0
 473#define FAN_MIN                         1
 474static ssize_t
 475show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 476{
 477        struct sensor_device_attribute_2 *sensor_attr =
 478            to_sensor_dev_attr_2(attr);
 479        int nr = sensor_attr->nr;
 480        int index = sensor_attr->index;
 481        struct w83793_data *data = w83793_update_device(dev);
 482        u16 val;
 483
 484        if (nr == FAN_INPUT)
 485                val = data->fan[index] & 0x0fff;
 486        else
 487                val = data->fan_min[index] & 0x0fff;
 488
 489        return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
 490}
 491
 492static ssize_t
 493store_fan_min(struct device *dev, struct device_attribute *attr,
 494              const char *buf, size_t count)
 495{
 496        struct sensor_device_attribute_2 *sensor_attr =
 497            to_sensor_dev_attr_2(attr);
 498        int index = sensor_attr->index;
 499        struct i2c_client *client = to_i2c_client(dev);
 500        struct w83793_data *data = i2c_get_clientdata(client);
 501        unsigned long val;
 502        int err;
 503
 504        err = kstrtoul(buf, 10, &val);
 505        if (err)
 506                return err;
 507        val = FAN_TO_REG(val);
 508
 509        mutex_lock(&data->update_lock);
 510        data->fan_min[index] = val;
 511        w83793_write_value(client, W83793_REG_FAN_MIN(index),
 512                           (val >> 8) & 0xff);
 513        w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
 514        mutex_unlock(&data->update_lock);
 515
 516        return count;
 517}
 518
 519static ssize_t
 520show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 521{
 522        struct sensor_device_attribute_2 *sensor_attr =
 523            to_sensor_dev_attr_2(attr);
 524        struct w83793_data *data = w83793_update_device(dev);
 525        u16 val;
 526        int nr = sensor_attr->nr;
 527        int index = sensor_attr->index;
 528
 529        if (nr == PWM_STOP_TIME)
 530                val = TIME_FROM_REG(data->pwm_stop_time[index]);
 531        else
 532                val = (data->pwm[index][nr] & 0x3f) << 2;
 533
 534        return sprintf(buf, "%d\n", val);
 535}
 536
 537static ssize_t
 538store_pwm(struct device *dev, struct device_attribute *attr,
 539          const char *buf, size_t count)
 540{
 541        struct i2c_client *client = to_i2c_client(dev);
 542        struct w83793_data *data = i2c_get_clientdata(client);
 543        struct sensor_device_attribute_2 *sensor_attr =
 544            to_sensor_dev_attr_2(attr);
 545        int nr = sensor_attr->nr;
 546        int index = sensor_attr->index;
 547        unsigned long val;
 548        int err;
 549
 550        err = kstrtoul(buf, 10, &val);
 551        if (err)
 552                return err;
 553
 554        mutex_lock(&data->update_lock);
 555        if (nr == PWM_STOP_TIME) {
 556                val = TIME_TO_REG(val);
 557                data->pwm_stop_time[index] = val;
 558                w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
 559                                   val);
 560        } else {
 561                val = clamp_val(val, 0, 0xff) >> 2;
 562                data->pwm[index][nr] =
 563                    w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
 564                data->pwm[index][nr] |= val;
 565                w83793_write_value(client, W83793_REG_PWM(index, nr),
 566                                                        data->pwm[index][nr]);
 567        }
 568
 569        mutex_unlock(&data->update_lock);
 570        return count;
 571}
 572
 573static ssize_t
 574show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 575{
 576        struct sensor_device_attribute_2 *sensor_attr =
 577            to_sensor_dev_attr_2(attr);
 578        int nr = sensor_attr->nr;
 579        int index = sensor_attr->index;
 580        struct w83793_data *data = w83793_update_device(dev);
 581        long temp = TEMP_FROM_REG(data->temp[index][nr]);
 582
 583        if (nr == TEMP_READ && index < 4) {     /* Only TD1-TD4 have low bits */
 584                int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
 585                temp += temp > 0 ? low : -low;
 586        }
 587        return sprintf(buf, "%ld\n", temp);
 588}
 589
 590static ssize_t
 591store_temp(struct device *dev, struct device_attribute *attr,
 592           const char *buf, size_t count)
 593{
 594        struct sensor_device_attribute_2 *sensor_attr =
 595            to_sensor_dev_attr_2(attr);
 596        int nr = sensor_attr->nr;
 597        int index = sensor_attr->index;
 598        struct i2c_client *client = to_i2c_client(dev);
 599        struct w83793_data *data = i2c_get_clientdata(client);
 600        long tmp;
 601        int err;
 602
 603        err = kstrtol(buf, 10, &tmp);
 604        if (err)
 605                return err;
 606
 607        mutex_lock(&data->update_lock);
 608        data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
 609        w83793_write_value(client, W83793_REG_TEMP[index][nr],
 610                           data->temp[index][nr]);
 611        mutex_unlock(&data->update_lock);
 612        return count;
 613}
 614
 615/*
 616 * TD1-TD4
 617 * each has 4 mode:(2 bits)
 618 * 0:   Stop monitor
 619 * 1:   Use internal temp sensor(default)
 620 * 2:   Reserved
 621 * 3:   Use sensor in Intel CPU and get result by PECI
 622 *
 623 * TR1-TR2
 624 * each has 2 mode:(1 bit)
 625 * 0:   Disable temp sensor monitor
 626 * 1:   To enable temp sensors monitor
 627 */
 628
 629/* 0 disable, 6 PECI */
 630static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
 631
 632static ssize_t
 633show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
 634{
 635        struct w83793_data *data = w83793_update_device(dev);
 636        struct sensor_device_attribute_2 *sensor_attr =
 637            to_sensor_dev_attr_2(attr);
 638        int index = sensor_attr->index;
 639        u8 mask = (index < 4) ? 0x03 : 0x01;
 640        u8 shift = (index < 4) ? (2 * index) : (index - 4);
 641        u8 tmp;
 642        index = (index < 4) ? 0 : 1;
 643
 644        tmp = (data->temp_mode[index] >> shift) & mask;
 645
 646        /* for the internal sensor, found out if diode or thermistor */
 647        if (tmp == 1)
 648                tmp = index == 0 ? 3 : 4;
 649        else
 650                tmp = TO_TEMP_MODE[tmp];
 651
 652        return sprintf(buf, "%d\n", tmp);
 653}
 654
 655static ssize_t
 656store_temp_mode(struct device *dev, struct device_attribute *attr,
 657                const char *buf, size_t count)
 658{
 659        struct i2c_client *client = to_i2c_client(dev);
 660        struct w83793_data *data = i2c_get_clientdata(client);
 661        struct sensor_device_attribute_2 *sensor_attr =
 662            to_sensor_dev_attr_2(attr);
 663        int index = sensor_attr->index;
 664        u8 mask = (index < 4) ? 0x03 : 0x01;
 665        u8 shift = (index < 4) ? (2 * index) : (index - 4);
 666        unsigned long val;
 667        int err;
 668
 669        err = kstrtoul(buf, 10, &val);
 670        if (err)
 671                return err;
 672
 673        /* transform the sysfs interface values into table above */
 674        if ((val == 6) && (index < 4)) {
 675                val -= 3;
 676        } else if ((val == 3 && index < 4)
 677                || (val == 4 && index >= 4)) {
 678                /* transform diode or thermistor into internal enable */
 679                val = !!val;
 680        } else {
 681                return -EINVAL;
 682        }
 683
 684        index = (index < 4) ? 0 : 1;
 685        mutex_lock(&data->update_lock);
 686        data->temp_mode[index] =
 687            w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
 688        data->temp_mode[index] &= ~(mask << shift);
 689        data->temp_mode[index] |= val << shift;
 690        w83793_write_value(client, W83793_REG_TEMP_MODE[index],
 691                                                        data->temp_mode[index]);
 692        mutex_unlock(&data->update_lock);
 693
 694        return count;
 695}
 696
 697#define SETUP_PWM_DEFAULT               0
 698#define SETUP_PWM_UPTIME                1       /* Unit in 0.1s */
 699#define SETUP_PWM_DOWNTIME              2       /* Unit in 0.1s */
 700#define SETUP_TEMP_CRITICAL             3
 701static ssize_t
 702show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
 703{
 704        struct sensor_device_attribute_2 *sensor_attr =
 705            to_sensor_dev_attr_2(attr);
 706        int nr = sensor_attr->nr;
 707        struct w83793_data *data = w83793_update_device(dev);
 708        u32 val = 0;
 709
 710        if (nr == SETUP_PWM_DEFAULT)
 711                val = (data->pwm_default & 0x3f) << 2;
 712        else if (nr == SETUP_PWM_UPTIME)
 713                val = TIME_FROM_REG(data->pwm_uptime);
 714        else if (nr == SETUP_PWM_DOWNTIME)
 715                val = TIME_FROM_REG(data->pwm_downtime);
 716        else if (nr == SETUP_TEMP_CRITICAL)
 717                val = TEMP_FROM_REG(data->temp_critical & 0x7f);
 718
 719        return sprintf(buf, "%d\n", val);
 720}
 721
 722static ssize_t
 723store_sf_setup(struct device *dev, struct device_attribute *attr,
 724               const char *buf, size_t count)
 725{
 726        struct sensor_device_attribute_2 *sensor_attr =
 727            to_sensor_dev_attr_2(attr);
 728        int nr = sensor_attr->nr;
 729        struct i2c_client *client = to_i2c_client(dev);
 730        struct w83793_data *data = i2c_get_clientdata(client);
 731        long val;
 732        int err;
 733
 734        err = kstrtol(buf, 10, &val);
 735        if (err)
 736                return err;
 737
 738        mutex_lock(&data->update_lock);
 739        if (nr == SETUP_PWM_DEFAULT) {
 740                data->pwm_default =
 741                    w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
 742                data->pwm_default |= clamp_val(val, 0, 0xff) >> 2;
 743                w83793_write_value(client, W83793_REG_PWM_DEFAULT,
 744                                                        data->pwm_default);
 745        } else if (nr == SETUP_PWM_UPTIME) {
 746                data->pwm_uptime = TIME_TO_REG(val);
 747                data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
 748                w83793_write_value(client, W83793_REG_PWM_UPTIME,
 749                                                        data->pwm_uptime);
 750        } else if (nr == SETUP_PWM_DOWNTIME) {
 751                data->pwm_downtime = TIME_TO_REG(val);
 752                data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
 753                w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
 754                                                        data->pwm_downtime);
 755        } else {                /* SETUP_TEMP_CRITICAL */
 756                data->temp_critical =
 757                    w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
 758                data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
 759                w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
 760                                                        data->temp_critical);
 761        }
 762
 763        mutex_unlock(&data->update_lock);
 764        return count;
 765}
 766
 767/*
 768 * Temp SmartFan control
 769 * TEMP_FAN_MAP
 770 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
 771 * It's possible two or more temp channels control the same fan, w83793
 772 * always prefers to pick the most critical request and applies it to
 773 * the related Fan.
 774 * It's possible one fan is not in any mapping of 6 temp channels, this
 775 * means the fan is manual mode
 776 *
 777 * TEMP_PWM_ENABLE
 778 * Each temp channel has its own SmartFan mode, and temp channel
 779 * control fans that are set by TEMP_FAN_MAP
 780 * 0:   SmartFanII mode
 781 * 1:   Thermal Cruise Mode
 782 *
 783 * TEMP_CRUISE
 784 * Target temperature in thermal cruise mode, w83793 will try to turn
 785 * fan speed to keep the temperature of target device around this
 786 * temperature.
 787 *
 788 * TEMP_TOLERANCE
 789 * If Temp higher or lower than target with this tolerance, w83793
 790 * will take actions to speed up or slow down the fan to keep the
 791 * temperature within the tolerance range.
 792 */
 793
 794#define TEMP_FAN_MAP                    0
 795#define TEMP_PWM_ENABLE                 1
 796#define TEMP_CRUISE                     2
 797#define TEMP_TOLERANCE                  3
 798static ssize_t
 799show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
 800{
 801        struct sensor_device_attribute_2 *sensor_attr =
 802            to_sensor_dev_attr_2(attr);
 803        int nr = sensor_attr->nr;
 804        int index = sensor_attr->index;
 805        struct w83793_data *data = w83793_update_device(dev);
 806        u32 val;
 807
 808        if (nr == TEMP_FAN_MAP) {
 809                val = data->temp_fan_map[index];
 810        } else if (nr == TEMP_PWM_ENABLE) {
 811                /* +2 to transfrom into 2 and 3 to conform with sysfs intf */
 812                val = ((data->pwm_enable >> index) & 0x01) + 2;
 813        } else if (nr == TEMP_CRUISE) {
 814                val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
 815        } else {                /* TEMP_TOLERANCE */
 816                val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
 817                val = TEMP_FROM_REG(val & 0x0f);
 818        }
 819        return sprintf(buf, "%d\n", val);
 820}
 821
 822static ssize_t
 823store_sf_ctrl(struct device *dev, struct device_attribute *attr,
 824              const char *buf, size_t count)
 825{
 826        struct sensor_device_attribute_2 *sensor_attr =
 827            to_sensor_dev_attr_2(attr);
 828        int nr = sensor_attr->nr;
 829        int index = sensor_attr->index;
 830        struct i2c_client *client = to_i2c_client(dev);
 831        struct w83793_data *data = i2c_get_clientdata(client);
 832        long val;
 833        int err;
 834
 835        err = kstrtol(buf, 10, &val);
 836        if (err)
 837                return err;
 838
 839        mutex_lock(&data->update_lock);
 840        if (nr == TEMP_FAN_MAP) {
 841                val = clamp_val(val, 0, 255);
 842                w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
 843                data->temp_fan_map[index] = val;
 844        } else if (nr == TEMP_PWM_ENABLE) {
 845                if (val == 2 || val == 3) {
 846                        data->pwm_enable =
 847                            w83793_read_value(client, W83793_REG_PWM_ENABLE);
 848                        if (val - 2)
 849                                data->pwm_enable |= 1 << index;
 850                        else
 851                                data->pwm_enable &= ~(1 << index);
 852                        w83793_write_value(client, W83793_REG_PWM_ENABLE,
 853                                                        data->pwm_enable);
 854                } else {
 855                        mutex_unlock(&data->update_lock);
 856                        return -EINVAL;
 857                }
 858        } else if (nr == TEMP_CRUISE) {
 859                data->temp_cruise[index] =
 860                    w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
 861                data->temp_cruise[index] &= 0x80;
 862                data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
 863
 864                w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
 865                                                data->temp_cruise[index]);
 866        } else {                /* TEMP_TOLERANCE */
 867                int i = index >> 1;
 868                u8 shift = (index & 0x01) ? 4 : 0;
 869                data->tolerance[i] =
 870                    w83793_read_value(client, W83793_REG_TEMP_TOL(i));
 871
 872                data->tolerance[i] &= ~(0x0f << shift);
 873                data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
 874                w83793_write_value(client, W83793_REG_TEMP_TOL(i),
 875                                                        data->tolerance[i]);
 876        }
 877
 878        mutex_unlock(&data->update_lock);
 879        return count;
 880}
 881
 882static ssize_t
 883show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 884{
 885        struct sensor_device_attribute_2 *sensor_attr =
 886            to_sensor_dev_attr_2(attr);
 887        int nr = sensor_attr->nr;
 888        int index = sensor_attr->index;
 889        struct w83793_data *data = w83793_update_device(dev);
 890
 891        return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
 892}
 893
 894static ssize_t
 895store_sf2_pwm(struct device *dev, struct device_attribute *attr,
 896              const char *buf, size_t count)
 897{
 898        struct i2c_client *client = to_i2c_client(dev);
 899        struct w83793_data *data = i2c_get_clientdata(client);
 900        struct sensor_device_attribute_2 *sensor_attr =
 901            to_sensor_dev_attr_2(attr);
 902        int nr = sensor_attr->nr;
 903        int index = sensor_attr->index;
 904        unsigned long val;
 905        int err;
 906
 907        err = kstrtoul(buf, 10, &val);
 908        if (err)
 909                return err;
 910        val = clamp_val(val, 0, 0xff) >> 2;
 911
 912        mutex_lock(&data->update_lock);
 913        data->sf2_pwm[index][nr] =
 914            w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
 915        data->sf2_pwm[index][nr] |= val;
 916        w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
 917                                                data->sf2_pwm[index][nr]);
 918        mutex_unlock(&data->update_lock);
 919        return count;
 920}
 921
 922static ssize_t
 923show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
 924{
 925        struct sensor_device_attribute_2 *sensor_attr =
 926            to_sensor_dev_attr_2(attr);
 927        int nr = sensor_attr->nr;
 928        int index = sensor_attr->index;
 929        struct w83793_data *data = w83793_update_device(dev);
 930
 931        return sprintf(buf, "%ld\n",
 932                       TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
 933}
 934
 935static ssize_t
 936store_sf2_temp(struct device *dev, struct device_attribute *attr,
 937               const char *buf, size_t count)
 938{
 939        struct i2c_client *client = to_i2c_client(dev);
 940        struct w83793_data *data = i2c_get_clientdata(client);
 941        struct sensor_device_attribute_2 *sensor_attr =
 942            to_sensor_dev_attr_2(attr);
 943        int nr = sensor_attr->nr;
 944        int index = sensor_attr->index;
 945        long val;
 946        int err;
 947
 948        err = kstrtol(buf, 10, &val);
 949        if (err)
 950                return err;
 951        val = TEMP_TO_REG(val, 0, 0x7f);
 952
 953        mutex_lock(&data->update_lock);
 954        data->sf2_temp[index][nr] =
 955            w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
 956        data->sf2_temp[index][nr] |= val;
 957        w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
 958                                             data->sf2_temp[index][nr]);
 959        mutex_unlock(&data->update_lock);
 960        return count;
 961}
 962
 963/* only Vcore A/B and Vtt have additional 2 bits precision */
 964static ssize_t
 965show_in(struct device *dev, struct device_attribute *attr, char *buf)
 966{
 967        struct sensor_device_attribute_2 *sensor_attr =
 968            to_sensor_dev_attr_2(attr);
 969        int nr = sensor_attr->nr;
 970        int index = sensor_attr->index;
 971        struct w83793_data *data = w83793_update_device(dev);
 972        u16 val = data->in[index][nr];
 973
 974        if (index < 3) {
 975                val <<= 2;
 976                val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
 977        }
 978        /* voltage inputs 5VDD and 5VSB needs 150mV offset */
 979        val = val * scale_in[index] + scale_in_add[index];
 980        return sprintf(buf, "%d\n", val);
 981}
 982
 983static ssize_t
 984store_in(struct device *dev, struct device_attribute *attr,
 985         const char *buf, size_t count)
 986{
 987        struct sensor_device_attribute_2 *sensor_attr =
 988            to_sensor_dev_attr_2(attr);
 989        int nr = sensor_attr->nr;
 990        int index = sensor_attr->index;
 991        struct i2c_client *client = to_i2c_client(dev);
 992        struct w83793_data *data = i2c_get_clientdata(client);
 993        unsigned long val;
 994        int err;
 995
 996        err = kstrtoul(buf, 10, &val);
 997        if (err)
 998                return err;
 999        val = (val + scale_in[index] / 2) / scale_in[index];
1000
1001        mutex_lock(&data->update_lock);
1002        if (index > 2) {
1003                /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
1004                if (nr == 1 || nr == 2)
1005                        val -= scale_in_add[index] / scale_in[index];
1006                val = clamp_val(val, 0, 255);
1007        } else {
1008                val = clamp_val(val, 0, 0x3FF);
1009                data->in_low_bits[nr] =
1010                    w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
1011                data->in_low_bits[nr] &= ~(0x03 << (2 * index));
1012                data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
1013                w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
1014                                                     data->in_low_bits[nr]);
1015                val >>= 2;
1016        }
1017        data->in[index][nr] = val;
1018        w83793_write_value(client, W83793_REG_IN[index][nr],
1019                                                        data->in[index][nr]);
1020        mutex_unlock(&data->update_lock);
1021        return count;
1022}
1023
1024#define NOT_USED                        -1
1025
1026#define SENSOR_ATTR_IN(index)                                           \
1027        SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1028                IN_READ, index),                                        \
1029        SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1030                store_in, IN_MAX, index),                               \
1031        SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1032                store_in, IN_LOW, index),                               \
1033        SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1034                NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),     \
1035        SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1036                show_alarm_beep, store_beep, BEEP_ENABLE,               \
1037                index + ((index > 2) ? 1 : 0))
1038
1039#define SENSOR_ATTR_FAN(index)                                          \
1040        SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1041                NULL, ALARM_STATUS, index + 17),                        \
1042        SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1043                show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),  \
1044        SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1045                NULL, FAN_INPUT, index - 1),                            \
1046        SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1047                show_fan, store_fan_min, FAN_MIN, index - 1)
1048
1049#define SENSOR_ATTR_PWM(index)                                          \
1050        SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1051                store_pwm, PWM_DUTY, index - 1),                        \
1052        SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1053                show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1054        SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1055                show_pwm, store_pwm, PWM_START, index - 1),             \
1056        SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1057                show_pwm, store_pwm, PWM_STOP_TIME, index - 1)
1058
1059#define SENSOR_ATTR_TEMP(index)                                         \
1060        SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,            \
1061                show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1062        SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1063                NULL, TEMP_READ, index - 1),                            \
1064        SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1065                store_temp, TEMP_CRIT, index - 1),                      \
1066        SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1067                show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1068        SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \
1069                store_temp, TEMP_WARN, index - 1),                      \
1070        SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,       \
1071                show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1072        SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1073                show_alarm_beep, NULL, ALARM_STATUS, index + 11),       \
1074        SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1075                show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),  \
1076        SENSOR_ATTR_2(temp##index##_auto_channels_pwm,                  \
1077                S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,         \
1078                TEMP_FAN_MAP, index - 1),                               \
1079        SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1080                show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,           \
1081                index - 1),                                             \
1082        SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,         \
1083                show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),   \
1084        SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
1085                store_sf_ctrl, TEMP_TOLERANCE, index - 1),              \
1086        SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1087                show_sf2_pwm, store_sf2_pwm, 0, index - 1),             \
1088        SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1089                show_sf2_pwm, store_sf2_pwm, 1, index - 1),             \
1090        SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1091                show_sf2_pwm, store_sf2_pwm, 2, index - 1),             \
1092        SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1093                show_sf2_pwm, store_sf2_pwm, 3, index - 1),             \
1094        SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1095                show_sf2_pwm, store_sf2_pwm, 4, index - 1),             \
1096        SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1097                show_sf2_pwm, store_sf2_pwm, 5, index - 1),             \
1098        SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1099                show_sf2_pwm, store_sf2_pwm, 6, index - 1),             \
1100        SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1101                show_sf2_temp, store_sf2_temp, 0, index - 1),           \
1102        SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1103                show_sf2_temp, store_sf2_temp, 1, index - 1),           \
1104        SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1105                show_sf2_temp, store_sf2_temp, 2, index - 1),           \
1106        SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1107                show_sf2_temp, store_sf2_temp, 3, index - 1),           \
1108        SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1109                show_sf2_temp, store_sf2_temp, 4, index - 1),           \
1110        SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1111                show_sf2_temp, store_sf2_temp, 5, index - 1),           \
1112        SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1113                show_sf2_temp, store_sf2_temp, 6, index - 1)
1114
1115static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
1116        SENSOR_ATTR_IN(0),
1117        SENSOR_ATTR_IN(1),
1118        SENSOR_ATTR_IN(2),
1119        SENSOR_ATTR_IN(3),
1120        SENSOR_ATTR_IN(4),
1121        SENSOR_ATTR_IN(5),
1122        SENSOR_ATTR_IN(6),
1123        SENSOR_ATTR_IN(7),
1124        SENSOR_ATTR_IN(8),
1125        SENSOR_ATTR_IN(9),
1126        SENSOR_ATTR_FAN(1),
1127        SENSOR_ATTR_FAN(2),
1128        SENSOR_ATTR_FAN(3),
1129        SENSOR_ATTR_FAN(4),
1130        SENSOR_ATTR_FAN(5),
1131        SENSOR_ATTR_PWM(1),
1132        SENSOR_ATTR_PWM(2),
1133        SENSOR_ATTR_PWM(3),
1134};
1135
1136static struct sensor_device_attribute_2 w83793_temp[] = {
1137        SENSOR_ATTR_TEMP(1),
1138        SENSOR_ATTR_TEMP(2),
1139        SENSOR_ATTR_TEMP(3),
1140        SENSOR_ATTR_TEMP(4),
1141        SENSOR_ATTR_TEMP(5),
1142        SENSOR_ATTR_TEMP(6),
1143};
1144
1145/* Fan6-Fan12 */
1146static struct sensor_device_attribute_2 w83793_left_fan[] = {
1147        SENSOR_ATTR_FAN(6),
1148        SENSOR_ATTR_FAN(7),
1149        SENSOR_ATTR_FAN(8),
1150        SENSOR_ATTR_FAN(9),
1151        SENSOR_ATTR_FAN(10),
1152        SENSOR_ATTR_FAN(11),
1153        SENSOR_ATTR_FAN(12),
1154};
1155
1156/* Pwm4-Pwm8 */
1157static struct sensor_device_attribute_2 w83793_left_pwm[] = {
1158        SENSOR_ATTR_PWM(4),
1159        SENSOR_ATTR_PWM(5),
1160        SENSOR_ATTR_PWM(6),
1161        SENSOR_ATTR_PWM(7),
1162        SENSOR_ATTR_PWM(8),
1163};
1164
1165static struct sensor_device_attribute_2 w83793_vid[] = {
1166        SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
1167        SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1168};
1169static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
1170
1171static struct sensor_device_attribute_2 sda_single_files[] = {
1172        SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1173                      store_chassis_clear, ALARM_STATUS, 30),
1174        SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
1175                      store_beep_enable, NOT_USED, NOT_USED),
1176        SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1177                      store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1178        SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1179                      store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1180        SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1181                      store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1182        SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
1183                      store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
1184};
1185
1186static void w83793_init_client(struct i2c_client *client)
1187{
1188        if (reset)
1189                w83793_write_value(client, W83793_REG_CONFIG, 0x80);
1190
1191        /* Start monitoring */
1192        w83793_write_value(client, W83793_REG_CONFIG,
1193                           w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
1194}
1195
1196/*
1197 * Watchdog routines
1198 */
1199
1200static int watchdog_set_timeout(struct w83793_data *data, int timeout)
1201{
1202        int ret, mtimeout;
1203
1204        mtimeout = DIV_ROUND_UP(timeout, 60);
1205
1206        if (mtimeout > 255)
1207                return -EINVAL;
1208
1209        mutex_lock(&data->watchdog_lock);
1210        if (!data->client) {
1211                ret = -ENODEV;
1212                goto leave;
1213        }
1214
1215        data->watchdog_timeout = mtimeout;
1216
1217        /* Set Timeout value (in Minutes) */
1218        w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1219                           data->watchdog_timeout);
1220
1221        ret = mtimeout * 60;
1222
1223leave:
1224        mutex_unlock(&data->watchdog_lock);
1225        return ret;
1226}
1227
1228static int watchdog_get_timeout(struct w83793_data *data)
1229{
1230        int timeout;
1231
1232        mutex_lock(&data->watchdog_lock);
1233        timeout = data->watchdog_timeout * 60;
1234        mutex_unlock(&data->watchdog_lock);
1235
1236        return timeout;
1237}
1238
1239static int watchdog_trigger(struct w83793_data *data)
1240{
1241        int ret = 0;
1242
1243        mutex_lock(&data->watchdog_lock);
1244        if (!data->client) {
1245                ret = -ENODEV;
1246                goto leave;
1247        }
1248
1249        /* Set Timeout value (in Minutes) */
1250        w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1251                           data->watchdog_timeout);
1252
1253leave:
1254        mutex_unlock(&data->watchdog_lock);
1255        return ret;
1256}
1257
1258static int watchdog_enable(struct w83793_data *data)
1259{
1260        int ret = 0;
1261
1262        mutex_lock(&data->watchdog_lock);
1263        if (!data->client) {
1264                ret = -ENODEV;
1265                goto leave;
1266        }
1267
1268        /* Set initial timeout */
1269        w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
1270                           data->watchdog_timeout);
1271
1272        /* Enable Soft Watchdog */
1273        w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
1274
1275leave:
1276        mutex_unlock(&data->watchdog_lock);
1277        return ret;
1278}
1279
1280static int watchdog_disable(struct w83793_data *data)
1281{
1282        int ret = 0;
1283
1284        mutex_lock(&data->watchdog_lock);
1285        if (!data->client) {
1286                ret = -ENODEV;
1287                goto leave;
1288        }
1289
1290        /* Disable Soft Watchdog */
1291        w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
1292
1293leave:
1294        mutex_unlock(&data->watchdog_lock);
1295        return ret;
1296}
1297
1298static int watchdog_open(struct inode *inode, struct file *filp)
1299{
1300        struct w83793_data *pos, *data = NULL;
1301        int watchdog_is_open;
1302
1303        /*
1304         * We get called from drivers/char/misc.c with misc_mtx hold, and we
1305         * call misc_register() from  w83793_probe() with watchdog_data_mutex
1306         * hold, as misc_register() takes the misc_mtx lock, this is a possible
1307         * deadlock, so we use mutex_trylock here.
1308         */
1309        if (!mutex_trylock(&watchdog_data_mutex))
1310                return -ERESTARTSYS;
1311        list_for_each_entry(pos, &watchdog_data_list, list) {
1312                if (pos->watchdog_miscdev.minor == iminor(inode)) {
1313                        data = pos;
1314                        break;
1315                }
1316        }
1317
1318        /* Check, if device is already open */
1319        watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
1320
1321        /*
1322         * Increase data reference counter (if not already done).
1323         * Note we can never not have found data, so we don't check for this
1324         */
1325        if (!watchdog_is_open)
1326                kref_get(&data->kref);
1327
1328        mutex_unlock(&watchdog_data_mutex);
1329
1330        /* Check, if device is already open and possibly issue error */
1331        if (watchdog_is_open)
1332                return -EBUSY;
1333
1334        /* Enable Soft Watchdog */
1335        watchdog_enable(data);
1336
1337        /* Store pointer to data into filp's private data */
1338        filp->private_data = data;
1339
1340        return nonseekable_open(inode, filp);
1341}
1342
1343static int watchdog_close(struct inode *inode, struct file *filp)
1344{
1345        struct w83793_data *data = filp->private_data;
1346
1347        if (data->watchdog_expect_close) {
1348                watchdog_disable(data);
1349                data->watchdog_expect_close = 0;
1350        } else {
1351                watchdog_trigger(data);
1352                dev_crit(&data->client->dev,
1353                        "unexpected close, not stopping watchdog!\n");
1354        }
1355
1356        clear_bit(0, &data->watchdog_is_open);
1357
1358        /* Decrease data reference counter */
1359        mutex_lock(&watchdog_data_mutex);
1360        kref_put(&data->kref, w83793_release_resources);
1361        mutex_unlock(&watchdog_data_mutex);
1362
1363        return 0;
1364}
1365
1366static ssize_t watchdog_write(struct file *filp, const char __user *buf,
1367        size_t count, loff_t *offset)
1368{
1369        ssize_t ret;
1370        struct w83793_data *data = filp->private_data;
1371
1372        if (count) {
1373                if (!nowayout) {
1374                        size_t i;
1375
1376                        /* Clear it in case it was set with a previous write */
1377                        data->watchdog_expect_close = 0;
1378
1379                        for (i = 0; i != count; i++) {
1380                                char c;
1381                                if (get_user(c, buf + i))
1382                                        return -EFAULT;
1383                                if (c == 'V')
1384                                        data->watchdog_expect_close = 1;
1385                        }
1386                }
1387                ret = watchdog_trigger(data);
1388                if (ret < 0)
1389                        return ret;
1390        }
1391        return count;
1392}
1393
1394static long watchdog_ioctl(struct file *filp, unsigned int cmd,
1395                           unsigned long arg)
1396{
1397        struct watchdog_info ident = {
1398                .options = WDIOF_KEEPALIVEPING |
1399                           WDIOF_SETTIMEOUT |
1400                           WDIOF_CARDRESET,
1401                .identity = "w83793 watchdog"
1402        };
1403
1404        int val, ret = 0;
1405        struct w83793_data *data = filp->private_data;
1406
1407        switch (cmd) {
1408        case WDIOC_GETSUPPORT:
1409                if (!nowayout)
1410                        ident.options |= WDIOF_MAGICCLOSE;
1411                if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
1412                        ret = -EFAULT;
1413                break;
1414
1415        case WDIOC_GETSTATUS:
1416                val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
1417                ret = put_user(val, (int __user *)arg);
1418                break;
1419
1420        case WDIOC_GETBOOTSTATUS:
1421                ret = put_user(0, (int __user *)arg);
1422                break;
1423
1424        case WDIOC_KEEPALIVE:
1425                ret = watchdog_trigger(data);
1426                break;
1427
1428        case WDIOC_GETTIMEOUT:
1429                val = watchdog_get_timeout(data);
1430                ret = put_user(val, (int __user *)arg);
1431                break;
1432
1433        case WDIOC_SETTIMEOUT:
1434                if (get_user(val, (int __user *)arg)) {
1435                        ret = -EFAULT;
1436                        break;
1437                }
1438                ret = watchdog_set_timeout(data, val);
1439                if (ret > 0)
1440                        ret = put_user(ret, (int __user *)arg);
1441                break;
1442
1443        case WDIOC_SETOPTIONS:
1444                if (get_user(val, (int __user *)arg)) {
1445                        ret = -EFAULT;
1446                        break;
1447                }
1448
1449                if (val & WDIOS_DISABLECARD)
1450                        ret = watchdog_disable(data);
1451                else if (val & WDIOS_ENABLECARD)
1452                        ret = watchdog_enable(data);
1453                else
1454                        ret = -EINVAL;
1455
1456                break;
1457        default:
1458                ret = -ENOTTY;
1459        }
1460        return ret;
1461}
1462
1463static const struct file_operations watchdog_fops = {
1464        .owner = THIS_MODULE,
1465        .llseek = no_llseek,
1466        .open = watchdog_open,
1467        .release = watchdog_close,
1468        .write = watchdog_write,
1469        .unlocked_ioctl = watchdog_ioctl,
1470};
1471
1472/*
1473 *      Notifier for system down
1474 */
1475
1476static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
1477                               void *unused)
1478{
1479        struct w83793_data *data = NULL;
1480
1481        if (code == SYS_DOWN || code == SYS_HALT) {
1482
1483                /* Disable each registered watchdog */
1484                mutex_lock(&watchdog_data_mutex);
1485                list_for_each_entry(data, &watchdog_data_list, list) {
1486                        if (data->watchdog_miscdev.minor)
1487                                watchdog_disable(data);
1488                }
1489                mutex_unlock(&watchdog_data_mutex);
1490        }
1491
1492        return NOTIFY_DONE;
1493}
1494
1495/*
1496 *      The WDT needs to learn about soft shutdowns in order to
1497 *      turn the timebomb registers off.
1498 */
1499
1500static struct notifier_block watchdog_notifier = {
1501        .notifier_call = watchdog_notify_sys,
1502};
1503
1504/*
1505 * Init / remove routines
1506 */
1507
1508static int w83793_remove(struct i2c_client *client)
1509{
1510        struct w83793_data *data = i2c_get_clientdata(client);
1511        struct device *dev = &client->dev;
1512        int i, tmp;
1513
1514        /* Unregister the watchdog (if registered) */
1515        if (data->watchdog_miscdev.minor) {
1516                misc_deregister(&data->watchdog_miscdev);
1517
1518                if (data->watchdog_is_open) {
1519                        dev_warn(&client->dev,
1520                                "i2c client detached with watchdog open! "
1521                                "Stopping watchdog.\n");
1522                        watchdog_disable(data);
1523                }
1524
1525                mutex_lock(&watchdog_data_mutex);
1526                list_del(&data->list);
1527                mutex_unlock(&watchdog_data_mutex);
1528
1529                /* Tell the watchdog code the client is gone */
1530                mutex_lock(&data->watchdog_lock);
1531                data->client = NULL;
1532                mutex_unlock(&data->watchdog_lock);
1533        }
1534
1535        /* Reset Configuration Register to Disable Watch Dog Registers */
1536        tmp = w83793_read_value(client, W83793_REG_CONFIG);
1537        w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
1538
1539        unregister_reboot_notifier(&watchdog_notifier);
1540
1541        hwmon_device_unregister(data->hwmon_dev);
1542
1543        for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1544                device_remove_file(dev,
1545                                   &w83793_sensor_attr_2[i].dev_attr);
1546
1547        for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1548                device_remove_file(dev, &sda_single_files[i].dev_attr);
1549
1550        for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1551                device_remove_file(dev, &w83793_vid[i].dev_attr);
1552        device_remove_file(dev, &dev_attr_vrm);
1553
1554        for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1555                device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1556
1557        for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1558                device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1559
1560        for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1561                device_remove_file(dev, &w83793_temp[i].dev_attr);
1562
1563        if (data->lm75[0] != NULL)
1564                i2c_unregister_device(data->lm75[0]);
1565        if (data->lm75[1] != NULL)
1566                i2c_unregister_device(data->lm75[1]);
1567
1568        /* Decrease data reference counter */
1569        mutex_lock(&watchdog_data_mutex);
1570        kref_put(&data->kref, w83793_release_resources);
1571        mutex_unlock(&watchdog_data_mutex);
1572
1573        return 0;
1574}
1575
1576static int
1577w83793_detect_subclients(struct i2c_client *client)
1578{
1579        int i, id, err;
1580        int address = client->addr;
1581        u8 tmp;
1582        struct i2c_adapter *adapter = client->adapter;
1583        struct w83793_data *data = i2c_get_clientdata(client);
1584
1585        id = i2c_adapter_id(adapter);
1586        if (force_subclients[0] == id && force_subclients[1] == address) {
1587                for (i = 2; i <= 3; i++) {
1588                        if (force_subclients[i] < 0x48
1589                            || force_subclients[i] > 0x4f) {
1590                                dev_err(&client->dev,
1591                                        "invalid subclient "
1592                                        "address %d; must be 0x48-0x4f\n",
1593                                        force_subclients[i]);
1594                                err = -EINVAL;
1595                                goto ERROR_SC_0;
1596                        }
1597                }
1598                w83793_write_value(client, W83793_REG_I2C_SUBADDR,
1599                                   (force_subclients[2] & 0x07) |
1600                                   ((force_subclients[3] & 0x07) << 4));
1601        }
1602
1603        tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
1604        if (!(tmp & 0x08))
1605                data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
1606        if (!(tmp & 0x80)) {
1607                if ((data->lm75[0] != NULL)
1608                    && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
1609                        dev_err(&client->dev,
1610                                "duplicate addresses 0x%x, "
1611                                "use force_subclients\n", data->lm75[0]->addr);
1612                        err = -ENODEV;
1613                        goto ERROR_SC_1;
1614                }
1615                data->lm75[1] = i2c_new_dummy(adapter,
1616                                              0x48 + ((tmp >> 4) & 0x7));
1617        }
1618
1619        return 0;
1620
1621        /* Undo inits in case of errors */
1622
1623ERROR_SC_1:
1624        if (data->lm75[0] != NULL)
1625                i2c_unregister_device(data->lm75[0]);
1626ERROR_SC_0:
1627        return err;
1628}
1629
1630/* Return 0 if detection is successful, -ENODEV otherwise */
1631static int w83793_detect(struct i2c_client *client,
1632                         struct i2c_board_info *info)
1633{
1634        u8 tmp, bank, chip_id;
1635        struct i2c_adapter *adapter = client->adapter;
1636        unsigned short address = client->addr;
1637
1638        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1639                return -ENODEV;
1640
1641        bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1642
1643        tmp = bank & 0x80 ? 0x5c : 0xa3;
1644        /* Check Winbond vendor ID */
1645        if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
1646                pr_debug("w83793: Detection failed at check vendor id\n");
1647                return -ENODEV;
1648        }
1649
1650        /*
1651         * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
1652         * should match
1653         */
1654        if ((bank & 0x07) == 0
1655         && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
1656            (address << 1)) {
1657                pr_debug("w83793: Detection failed at check i2c addr\n");
1658                return -ENODEV;
1659        }
1660
1661        /* Determine the chip type now */
1662        chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
1663        if (chip_id != 0x7b)
1664                return -ENODEV;
1665
1666        strlcpy(info->type, "w83793", I2C_NAME_SIZE);
1667
1668        return 0;
1669}
1670
1671static int w83793_probe(struct i2c_client *client,
1672                        const struct i2c_device_id *id)
1673{
1674        struct device *dev = &client->dev;
1675        const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1676        struct w83793_data *data;
1677        int i, tmp, val, err;
1678        int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
1679        int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1680        int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1681
1682        data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
1683        if (!data) {
1684                err = -ENOMEM;
1685                goto exit;
1686        }
1687
1688        i2c_set_clientdata(client, data);
1689        data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
1690        mutex_init(&data->update_lock);
1691        mutex_init(&data->watchdog_lock);
1692        INIT_LIST_HEAD(&data->list);
1693        kref_init(&data->kref);
1694
1695        /*
1696         * Store client pointer in our data struct for watchdog usage
1697         * (where the client is found through a data ptr instead of the
1698         * otherway around)
1699         */
1700        data->client = client;
1701
1702        err = w83793_detect_subclients(client);
1703        if (err)
1704                goto free_mem;
1705
1706        /* Initialize the chip */
1707        w83793_init_client(client);
1708
1709        /*
1710         * Only fan 1-5 has their own input pins,
1711         * Pwm 1-3 has their own pins
1712         */
1713        data->has_fan = 0x1f;
1714        data->has_pwm = 0x07;
1715        tmp = w83793_read_value(client, W83793_REG_MFC);
1716        val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
1717
1718        /* check the function of pins 49-56 */
1719        if (tmp & 0x80) {
1720                data->has_vid |= 0x2;   /* has VIDB */
1721        } else {
1722                data->has_pwm |= 0x18;  /* pwm 4,5 */
1723                if (val & 0x01) {       /* fan 6 */
1724                        data->has_fan |= 0x20;
1725                        data->has_pwm |= 0x20;
1726                }
1727                if (val & 0x02) {       /* fan 7 */
1728                        data->has_fan |= 0x40;
1729                        data->has_pwm |= 0x40;
1730                }
1731                if (!(tmp & 0x40) && (val & 0x04)) {    /* fan 8 */
1732                        data->has_fan |= 0x80;
1733                        data->has_pwm |= 0x80;
1734                }
1735        }
1736
1737        /* check the function of pins 37-40 */
1738        if (!(tmp & 0x29))
1739                data->has_vid |= 0x1;   /* has VIDA */
1740        if (0x08 == (tmp & 0x0c)) {
1741                if (val & 0x08) /* fan 9 */
1742                        data->has_fan |= 0x100;
1743                if (val & 0x10) /* fan 10 */
1744                        data->has_fan |= 0x200;
1745        }
1746        if (0x20 == (tmp & 0x30)) {
1747                if (val & 0x20) /* fan 11 */
1748                        data->has_fan |= 0x400;
1749                if (val & 0x40) /* fan 12 */
1750                        data->has_fan |= 0x800;
1751        }
1752
1753        if ((tmp & 0x01) && (val & 0x04)) {     /* fan 8, second location */
1754                data->has_fan |= 0x80;
1755                data->has_pwm |= 0x80;
1756        }
1757
1758        tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
1759        if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
1760                data->has_fan |= 0x100;
1761        }
1762        if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
1763                data->has_fan |= 0x200;
1764        }
1765        if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
1766                data->has_fan |= 0x400;
1767        }
1768        if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
1769                data->has_fan |= 0x800;
1770        }
1771
1772        /* check the temp1-6 mode, ignore former AMDSI selected inputs */
1773        tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
1774        if (tmp & 0x01)
1775                data->has_temp |= 0x01;
1776        if (tmp & 0x04)
1777                data->has_temp |= 0x02;
1778        if (tmp & 0x10)
1779                data->has_temp |= 0x04;
1780        if (tmp & 0x40)
1781                data->has_temp |= 0x08;
1782
1783        tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
1784        if (tmp & 0x01)
1785                data->has_temp |= 0x10;
1786        if (tmp & 0x02)
1787                data->has_temp |= 0x20;
1788
1789        /* Register sysfs hooks */
1790        for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
1791                err = device_create_file(dev,
1792                                         &w83793_sensor_attr_2[i].dev_attr);
1793                if (err)
1794                        goto exit_remove;
1795        }
1796
1797        for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
1798                if (!(data->has_vid & (1 << i)))
1799                        continue;
1800                err = device_create_file(dev, &w83793_vid[i].dev_attr);
1801                if (err)
1802                        goto exit_remove;
1803        }
1804        if (data->has_vid) {
1805                data->vrm = vid_which_vrm();
1806                err = device_create_file(dev, &dev_attr_vrm);
1807                if (err)
1808                        goto exit_remove;
1809        }
1810
1811        for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1812                err = device_create_file(dev, &sda_single_files[i].dev_attr);
1813                if (err)
1814                        goto exit_remove;
1815
1816        }
1817
1818        for (i = 0; i < 6; i++) {
1819                int j;
1820                if (!(data->has_temp & (1 << i)))
1821                        continue;
1822                for (j = 0; j < files_temp; j++) {
1823                        err = device_create_file(dev,
1824                                                &w83793_temp[(i) * files_temp
1825                                                                + j].dev_attr);
1826                        if (err)
1827                                goto exit_remove;
1828                }
1829        }
1830
1831        for (i = 5; i < 12; i++) {
1832                int j;
1833                if (!(data->has_fan & (1 << i)))
1834                        continue;
1835                for (j = 0; j < files_fan; j++) {
1836                        err = device_create_file(dev,
1837                                           &w83793_left_fan[(i - 5) * files_fan
1838                                                                + j].dev_attr);
1839                        if (err)
1840                                goto exit_remove;
1841                }
1842        }
1843
1844        for (i = 3; i < 8; i++) {
1845                int j;
1846                if (!(data->has_pwm & (1 << i)))
1847                        continue;
1848                for (j = 0; j < files_pwm; j++) {
1849                        err = device_create_file(dev,
1850                                           &w83793_left_pwm[(i - 3) * files_pwm
1851                                                                + j].dev_attr);
1852                        if (err)
1853                                goto exit_remove;
1854                }
1855        }
1856
1857        data->hwmon_dev = hwmon_device_register(dev);
1858        if (IS_ERR(data->hwmon_dev)) {
1859                err = PTR_ERR(data->hwmon_dev);
1860                goto exit_remove;
1861        }
1862
1863        /* Watchdog initialization */
1864
1865        /* Register boot notifier */
1866        err = register_reboot_notifier(&watchdog_notifier);
1867        if (err != 0) {
1868                dev_err(&client->dev,
1869                        "cannot register reboot notifier (err=%d)\n", err);
1870                goto exit_devunreg;
1871        }
1872
1873        /*
1874         * Enable Watchdog registers.
1875         * Set Configuration Register to Enable Watch Dog Registers
1876         * (Bit 2) = XXXX, X1XX.
1877         */
1878        tmp = w83793_read_value(client, W83793_REG_CONFIG);
1879        w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
1880
1881        /* Set the default watchdog timeout */
1882        data->watchdog_timeout = timeout;
1883
1884        /* Check, if last reboot was caused by watchdog */
1885        data->watchdog_caused_reboot =
1886          w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
1887
1888        /* Disable Soft Watchdog during initialiation */
1889        watchdog_disable(data);
1890
1891        /*
1892         * We take the data_mutex lock early so that watchdog_open() cannot
1893         * run when misc_register() has completed, but we've not yet added
1894         * our data to the watchdog_data_list (and set the default timeout)
1895         */
1896        mutex_lock(&watchdog_data_mutex);
1897        for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1898                /* Register our watchdog part */
1899                snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1900                        "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1901                data->watchdog_miscdev.name = data->watchdog_name;
1902                data->watchdog_miscdev.fops = &watchdog_fops;
1903                data->watchdog_miscdev.minor = watchdog_minors[i];
1904
1905                err = misc_register(&data->watchdog_miscdev);
1906                if (err == -EBUSY)
1907                        continue;
1908                if (err) {
1909                        data->watchdog_miscdev.minor = 0;
1910                        dev_err(&client->dev,
1911                                "Registering watchdog chardev: %d\n", err);
1912                        break;
1913                }
1914
1915                list_add(&data->list, &watchdog_data_list);
1916
1917                dev_info(&client->dev,
1918                        "Registered watchdog chardev major 10, minor: %d\n",
1919                        watchdog_minors[i]);
1920                break;
1921        }
1922        if (i == ARRAY_SIZE(watchdog_minors)) {
1923                data->watchdog_miscdev.minor = 0;
1924                dev_warn(&client->dev, "Couldn't register watchdog chardev "
1925                        "(due to no free minor)\n");
1926        }
1927
1928        mutex_unlock(&watchdog_data_mutex);
1929
1930        return 0;
1931
1932        /* Unregister hwmon device */
1933
1934exit_devunreg:
1935
1936        hwmon_device_unregister(data->hwmon_dev);
1937
1938        /* Unregister sysfs hooks */
1939
1940exit_remove:
1941        for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
1942                device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);
1943
1944        for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
1945                device_remove_file(dev, &sda_single_files[i].dev_attr);
1946
1947        for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
1948                device_remove_file(dev, &w83793_vid[i].dev_attr);
1949
1950        for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
1951                device_remove_file(dev, &w83793_left_fan[i].dev_attr);
1952
1953        for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
1954                device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1955
1956        for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
1957                device_remove_file(dev, &w83793_temp[i].dev_attr);
1958
1959        if (data->lm75[0] != NULL)
1960                i2c_unregister_device(data->lm75[0]);
1961        if (data->lm75[1] != NULL)
1962                i2c_unregister_device(data->lm75[1]);
1963free_mem:
1964        kfree(data);
1965exit:
1966        return err;
1967}
1968
1969static void w83793_update_nonvolatile(struct device *dev)
1970{
1971        struct i2c_client *client = to_i2c_client(dev);
1972        struct w83793_data *data = i2c_get_clientdata(client);
1973        int i, j;
1974        /*
1975         * They are somewhat "stable" registers, and to update them every time
1976         * takes so much time, it's just not worthy. Update them in a long
1977         * interval to avoid exception.
1978         */
1979        if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
1980              || !data->valid))
1981                return;
1982        /* update voltage limits */
1983        for (i = 1; i < 3; i++) {
1984                for (j = 0; j < ARRAY_SIZE(data->in); j++) {
1985                        data->in[j][i] =
1986                            w83793_read_value(client, W83793_REG_IN[j][i]);
1987                }
1988                data->in_low_bits[i] =
1989                    w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
1990        }
1991
1992        for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
1993                /* Update the Fan measured value and limits */
1994                if (!(data->has_fan & (1 << i)))
1995                        continue;
1996                data->fan_min[i] =
1997                    w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
1998                data->fan_min[i] |=
1999                    w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
2000        }
2001
2002        for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
2003                if (!(data->has_temp & (1 << i)))
2004                        continue;
2005                data->temp_fan_map[i] =
2006                    w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
2007                for (j = 1; j < 5; j++) {
2008                        data->temp[i][j] =
2009                            w83793_read_value(client, W83793_REG_TEMP[i][j]);
2010                }
2011                data->temp_cruise[i] =
2012                    w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
2013                for (j = 0; j < 7; j++) {
2014                        data->sf2_pwm[i][j] =
2015                            w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
2016                        data->sf2_temp[i][j] =
2017                            w83793_read_value(client,
2018                                              W83793_REG_SF2_TEMP(i, j));
2019                }
2020        }
2021
2022        for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
2023                data->temp_mode[i] =
2024                    w83793_read_value(client, W83793_REG_TEMP_MODE[i]);
2025
2026        for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
2027                data->tolerance[i] =
2028                    w83793_read_value(client, W83793_REG_TEMP_TOL(i));
2029        }
2030
2031        for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2032                if (!(data->has_pwm & (1 << i)))
2033                        continue;
2034                data->pwm[i][PWM_NONSTOP] =
2035                    w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
2036                data->pwm[i][PWM_START] =
2037                    w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
2038                data->pwm_stop_time[i] =
2039                    w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
2040        }
2041
2042        data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
2043        data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
2044        data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
2045        data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
2046        data->temp_critical =
2047            w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
2048        data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
2049
2050        for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2051                data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
2052
2053        data->last_nonvolatile = jiffies;
2054}
2055
2056static struct w83793_data *w83793_update_device(struct device *dev)
2057{
2058        struct i2c_client *client = to_i2c_client(dev);
2059        struct w83793_data *data = i2c_get_clientdata(client);
2060        int i;
2061
2062        mutex_lock(&data->update_lock);
2063
2064        if (!(time_after(jiffies, data->last_updated + HZ * 2)
2065              || !data->valid))
2066                goto END;
2067
2068        /* Update the voltages measured value and limits */
2069        for (i = 0; i < ARRAY_SIZE(data->in); i++)
2070                data->in[i][IN_READ] =
2071                    w83793_read_value(client, W83793_REG_IN[i][IN_READ]);
2072
2073        data->in_low_bits[IN_READ] =
2074            w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
2075
2076        for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
2077                if (!(data->has_fan & (1 << i)))
2078                        continue;
2079                data->fan[i] =
2080                    w83793_read_value(client, W83793_REG_FAN(i)) << 8;
2081                data->fan[i] |=
2082                    w83793_read_value(client, W83793_REG_FAN(i) + 1);
2083        }
2084
2085        for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
2086                if (!(data->has_temp & (1 << i)))
2087                        continue;
2088                data->temp[i][TEMP_READ] =
2089                    w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
2090        }
2091
2092        data->temp_low_bits =
2093            w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);
2094
2095        for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
2096                if (data->has_pwm & (1 << i))
2097                        data->pwm[i][PWM_DUTY] =
2098                            w83793_read_value(client,
2099                                              W83793_REG_PWM(i, PWM_DUTY));
2100        }
2101
2102        for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
2103                data->alarms[i] =
2104                    w83793_read_value(client, W83793_REG_ALARM(i));
2105        if (data->has_vid & 0x01)
2106                data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
2107        if (data->has_vid & 0x02)
2108                data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
2109        w83793_update_nonvolatile(dev);
2110        data->last_updated = jiffies;
2111        data->valid = 1;
2112
2113END:
2114        mutex_unlock(&data->update_lock);
2115        return data;
2116}
2117
2118/*
2119 * Ignore the possibility that somebody change bank outside the driver
2120 * Must be called with data->update_lock held, except during initialization
2121 */
2122static u8 w83793_read_value(struct i2c_client *client, u16 reg)
2123{
2124        struct w83793_data *data = i2c_get_clientdata(client);
2125        u8 res = 0xff;
2126        u8 new_bank = reg >> 8;
2127
2128        new_bank |= data->bank & 0xfc;
2129        if (data->bank != new_bank) {
2130                if (i2c_smbus_write_byte_data
2131                    (client, W83793_REG_BANKSEL, new_bank) >= 0)
2132                        data->bank = new_bank;
2133                else {
2134                        dev_err(&client->dev,
2135                                "set bank to %d failed, fall back "
2136                                "to bank %d, read reg 0x%x error\n",
2137                                new_bank, data->bank, reg);
2138                        res = 0x0;      /* read 0x0 from the chip */
2139                        goto END;
2140                }
2141        }
2142        res = i2c_smbus_read_byte_data(client, reg & 0xff);
2143END:
2144        return res;
2145}
2146
2147/* Must be called with data->update_lock held, except during initialization */
2148static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
2149{
2150        struct w83793_data *data = i2c_get_clientdata(client);
2151        int res;
2152        u8 new_bank = reg >> 8;
2153
2154        new_bank |= data->bank & 0xfc;
2155        if (data->bank != new_bank) {
2156                res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
2157                                                new_bank);
2158                if (res < 0) {
2159                        dev_err(&client->dev,
2160                                "set bank to %d failed, fall back "
2161                                "to bank %d, write reg 0x%x error\n",
2162                                new_bank, data->bank, reg);
2163                        goto END;
2164                }
2165                data->bank = new_bank;
2166        }
2167
2168        res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
2169END:
2170        return res;
2171}
2172
2173module_i2c_driver(w83793_driver);
2174
2175MODULE_AUTHOR("Yuan Mu, Sven Anders");
2176MODULE_DESCRIPTION("w83793 driver");
2177MODULE_LICENSE("GPL");
2178
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.