linux/drivers/hwmon/w83l786ng.c
<<
>>
Prefs
   1/*
   2 * w83l786ng.c - Linux kernel driver for hardware monitoring
   3 * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation - version 2.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17 * 02110-1301 USA.
  18 */
  19
  20/*
  21 * Supports following chips:
  22 *
  23 * Chip #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  24 * w83l786ng    3       2       2       2       0x7b    0x5ca3  yes     no
  25 */
  26
  27#include <linux/module.h>
  28#include <linux/init.h>
  29#include <linux/slab.h>
  30#include <linux/i2c.h>
  31#include <linux/hwmon.h>
  32#include <linux/hwmon-vid.h>
  33#include <linux/hwmon-sysfs.h>
  34#include <linux/err.h>
  35#include <linux/mutex.h>
  36
  37/* Addresses to scan */
  38static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
  39
  40/* Insmod parameters */
  41
  42static bool reset;
  43module_param(reset, bool, 0);
  44MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  45
  46#define W83L786NG_REG_IN_MIN(nr)        (0x2C + (nr) * 2)
  47#define W83L786NG_REG_IN_MAX(nr)        (0x2B + (nr) * 2)
  48#define W83L786NG_REG_IN(nr)            ((nr) + 0x20)
  49
  50#define W83L786NG_REG_FAN(nr)           ((nr) + 0x28)
  51#define W83L786NG_REG_FAN_MIN(nr)       ((nr) + 0x3B)
  52
  53#define W83L786NG_REG_CONFIG            0x40
  54#define W83L786NG_REG_ALARM1            0x41
  55#define W83L786NG_REG_ALARM2            0x42
  56#define W83L786NG_REG_GPIO_EN           0x47
  57#define W83L786NG_REG_MAN_ID2           0x4C
  58#define W83L786NG_REG_MAN_ID1           0x4D
  59#define W83L786NG_REG_CHIP_ID           0x4E
  60
  61#define W83L786NG_REG_DIODE             0x53
  62#define W83L786NG_REG_FAN_DIV           0x54
  63#define W83L786NG_REG_FAN_CFG           0x80
  64
  65#define W83L786NG_REG_TOLERANCE         0x8D
  66
  67static const u8 W83L786NG_REG_TEMP[2][3] = {
  68        { 0x25,         /* TEMP 0 in DataSheet */
  69          0x35,         /* TEMP 0 Over in DataSheet */
  70          0x36 },       /* TEMP 0 Hyst in DataSheet */
  71        { 0x26,         /* TEMP 1 in DataSheet */
  72          0x37,         /* TEMP 1 Over in DataSheet */
  73          0x38 }        /* TEMP 1 Hyst in DataSheet */
  74};
  75
  76static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
  77static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
  78
  79/* FAN Duty Cycle, be used to control */
  80static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
  81
  82
  83static inline u8
  84FAN_TO_REG(long rpm, int div)
  85{
  86        if (rpm == 0)
  87                return 255;
  88        rpm = SENSORS_LIMIT(rpm, 1, 1000000);
  89        return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
  90}
  91
  92#define FAN_FROM_REG(val, div)  ((val) == 0   ? -1 : \
  93                                ((val) == 255 ? 0 : \
  94                                1350000 / ((val) * (div))))
  95
  96/* for temp */
  97#define TEMP_TO_REG(val)        (SENSORS_LIMIT(((val) < 0 ? \
  98                                                (val) + 0x100 * 1000 \
  99                                                : (val)) / 1000, 0, 0xff))
 100#define TEMP_FROM_REG(val)      (((val) & 0x80 ? \
 101                                  (val) - 0x100 : (val)) * 1000)
 102
 103/*
 104 * The analog voltage inputs have 8mV LSB. Since the sysfs output is
 105 * in mV as would be measured on the chip input pin, need to just
 106 * multiply/divide by 8 to translate from/to register values.
 107 */
 108#define IN_TO_REG(val)          (SENSORS_LIMIT((((val) + 4) / 8), 0, 255))
 109#define IN_FROM_REG(val)        ((val) * 8)
 110
 111#define DIV_FROM_REG(val)       (1 << (val))
 112
 113static inline u8
 114DIV_TO_REG(long val)
 115{
 116        int i;
 117        val = SENSORS_LIMIT(val, 1, 128) >> 1;
 118        for (i = 0; i < 7; i++) {
 119                if (val == 0)
 120                        break;
 121                val >>= 1;
 122        }
 123        return (u8)i;
 124}
 125
 126struct w83l786ng_data {
 127        struct device *hwmon_dev;
 128        struct mutex update_lock;
 129        char valid;                     /* !=0 if following fields are valid */
 130        unsigned long last_updated;     /* In jiffies */
 131        unsigned long last_nonvolatile; /* In jiffies, last time we update the
 132                                         * nonvolatile registers */
 133
 134        u8 in[3];
 135        u8 in_max[3];
 136        u8 in_min[3];
 137        u8 fan[2];
 138        u8 fan_div[2];
 139        u8 fan_min[2];
 140        u8 temp_type[2];
 141        u8 temp[2][3];
 142        u8 pwm[2];
 143        u8 pwm_mode[2]; /* 0->DC variable voltage
 144                         * 1->PWM variable duty cycle */
 145
 146        u8 pwm_enable[2]; /* 1->manual
 147                           * 2->thermal cruise (also called SmartFan I) */
 148        u8 tolerance[2];
 149};
 150
 151static int w83l786ng_probe(struct i2c_client *client,
 152                           const struct i2c_device_id *id);
 153static int w83l786ng_detect(struct i2c_client *client,
 154                            struct i2c_board_info *info);
 155static int w83l786ng_remove(struct i2c_client *client);
 156static void w83l786ng_init_client(struct i2c_client *client);
 157static struct w83l786ng_data *w83l786ng_update_device(struct device *dev);
 158
 159static const struct i2c_device_id w83l786ng_id[] = {
 160        { "w83l786ng", 0 },
 161        { }
 162};
 163MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
 164
 165static struct i2c_driver w83l786ng_driver = {
 166        .class          = I2C_CLASS_HWMON,
 167        .driver = {
 168                   .name = "w83l786ng",
 169        },
 170        .probe          = w83l786ng_probe,
 171        .remove         = w83l786ng_remove,
 172        .id_table       = w83l786ng_id,
 173        .detect         = w83l786ng_detect,
 174        .address_list   = normal_i2c,
 175};
 176
 177static u8
 178w83l786ng_read_value(struct i2c_client *client, u8 reg)
 179{
 180        return i2c_smbus_read_byte_data(client, reg);
 181}
 182
 183static int
 184w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
 185{
 186        return i2c_smbus_write_byte_data(client, reg, value);
 187}
 188
 189/* following are the sysfs callback functions */
 190#define show_in_reg(reg) \
 191static ssize_t \
 192show_##reg(struct device *dev, struct device_attribute *attr, \
 193           char *buf) \
 194{ \
 195        int nr = to_sensor_dev_attr(attr)->index; \
 196        struct w83l786ng_data *data = w83l786ng_update_device(dev); \
 197        return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
 198}
 199
 200show_in_reg(in)
 201show_in_reg(in_min)
 202show_in_reg(in_max)
 203
 204#define store_in_reg(REG, reg) \
 205static ssize_t \
 206store_in_##reg(struct device *dev, struct device_attribute *attr, \
 207               const char *buf, size_t count) \
 208{ \
 209        int nr = to_sensor_dev_attr(attr)->index; \
 210        struct i2c_client *client = to_i2c_client(dev); \
 211        struct w83l786ng_data *data = i2c_get_clientdata(client); \
 212        unsigned long val; \
 213        int err = kstrtoul(buf, 10, &val); \
 214        if (err) \
 215                return err; \
 216        mutex_lock(&data->update_lock); \
 217        data->in_##reg[nr] = IN_TO_REG(val); \
 218        w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
 219                              data->in_##reg[nr]); \
 220        mutex_unlock(&data->update_lock); \
 221        return count; \
 222}
 223
 224store_in_reg(MIN, min)
 225store_in_reg(MAX, max)
 226
 227static struct sensor_device_attribute sda_in_input[] = {
 228        SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
 229        SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
 230        SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
 231};
 232
 233static struct sensor_device_attribute sda_in_min[] = {
 234        SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
 235        SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
 236        SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
 237};
 238
 239static struct sensor_device_attribute sda_in_max[] = {
 240        SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
 241        SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
 242        SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
 243};
 244
 245#define show_fan_reg(reg) \
 246static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
 247                          char *buf) \
 248{ \
 249        int nr = to_sensor_dev_attr(attr)->index; \
 250        struct w83l786ng_data *data = w83l786ng_update_device(dev); \
 251        return sprintf(buf, "%d\n", \
 252                FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \
 253}
 254
 255show_fan_reg(fan);
 256show_fan_reg(fan_min);
 257
 258static ssize_t
 259store_fan_min(struct device *dev, struct device_attribute *attr,
 260              const char *buf, size_t count)
 261{
 262        int nr = to_sensor_dev_attr(attr)->index;
 263        struct i2c_client *client = to_i2c_client(dev);
 264        struct w83l786ng_data *data = i2c_get_clientdata(client);
 265        unsigned long val;
 266        int err;
 267
 268        err = kstrtoul(buf, 10, &val);
 269        if (err)
 270                return err;
 271
 272        mutex_lock(&data->update_lock);
 273        data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 274        w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
 275                              data->fan_min[nr]);
 276        mutex_unlock(&data->update_lock);
 277
 278        return count;
 279}
 280
 281static ssize_t
 282show_fan_div(struct device *dev, struct device_attribute *attr,
 283             char *buf)
 284{
 285        int nr = to_sensor_dev_attr(attr)->index;
 286        struct w83l786ng_data *data = w83l786ng_update_device(dev);
 287        return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
 288}
 289
 290/*
 291 * Note: we save and restore the fan minimum here, because its value is
 292 * determined in part by the fan divisor.  This follows the principle of
 293 * least surprise; the user doesn't expect the fan minimum to change just
 294 * because the divisor changed.
 295 */
 296static ssize_t
 297store_fan_div(struct device *dev, struct device_attribute *attr,
 298              const char *buf, size_t count)
 299{
 300        int nr = to_sensor_dev_attr(attr)->index;
 301        struct i2c_client *client = to_i2c_client(dev);
 302        struct w83l786ng_data *data = i2c_get_clientdata(client);
 303
 304        unsigned long min;
 305        u8 tmp_fan_div;
 306        u8 fan_div_reg;
 307        u8 keep_mask = 0;
 308        u8 new_shift = 0;
 309
 310        unsigned long val;
 311        int err;
 312
 313        err = kstrtoul(buf, 10, &val);
 314        if (err)
 315                return err;
 316
 317        /* Save fan_min */
 318        mutex_lock(&data->update_lock);
 319        min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 320
 321        data->fan_div[nr] = DIV_TO_REG(val);
 322
 323        switch (nr) {
 324        case 0:
 325                keep_mask = 0xf8;
 326                new_shift = 0;
 327                break;
 328        case 1:
 329                keep_mask = 0x8f;
 330                new_shift = 4;
 331                break;
 332        }
 333
 334        fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
 335                                           & keep_mask;
 336
 337        tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
 338
 339        w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
 340                              fan_div_reg | tmp_fan_div);
 341
 342        /* Restore fan_min */
 343        data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 344        w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
 345                              data->fan_min[nr]);
 346        mutex_unlock(&data->update_lock);
 347
 348        return count;
 349}
 350
 351static struct sensor_device_attribute sda_fan_input[] = {
 352        SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
 353        SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
 354};
 355
 356static struct sensor_device_attribute sda_fan_min[] = {
 357        SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
 358                    store_fan_min, 0),
 359        SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
 360                    store_fan_min, 1),
 361};
 362
 363static struct sensor_device_attribute sda_fan_div[] = {
 364        SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
 365                    store_fan_div, 0),
 366        SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
 367                    store_fan_div, 1),
 368};
 369
 370
 371/* read/write the temperature, includes measured value and limits */
 372
 373static ssize_t
 374show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 375{
 376        struct sensor_device_attribute_2 *sensor_attr =
 377            to_sensor_dev_attr_2(attr);
 378        int nr = sensor_attr->nr;
 379        int index = sensor_attr->index;
 380        struct w83l786ng_data *data = w83l786ng_update_device(dev);
 381        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
 382}
 383
 384static ssize_t
 385store_temp(struct device *dev, struct device_attribute *attr,
 386           const char *buf, size_t count)
 387{
 388        struct sensor_device_attribute_2 *sensor_attr =
 389            to_sensor_dev_attr_2(attr);
 390        int nr = sensor_attr->nr;
 391        int index = sensor_attr->index;
 392        struct i2c_client *client = to_i2c_client(dev);
 393        struct w83l786ng_data *data = i2c_get_clientdata(client);
 394        long val;
 395        int err;
 396
 397        err = kstrtol(buf, 10, &val);
 398        if (err)
 399                return err;
 400
 401        mutex_lock(&data->update_lock);
 402        data->temp[nr][index] = TEMP_TO_REG(val);
 403        w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
 404                              data->temp[nr][index]);
 405        mutex_unlock(&data->update_lock);
 406
 407        return count;
 408}
 409
 410static struct sensor_device_attribute_2 sda_temp_input[] = {
 411        SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
 412        SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
 413};
 414
 415static struct sensor_device_attribute_2 sda_temp_max[] = {
 416        SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
 417                      show_temp, store_temp, 0, 1),
 418        SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
 419                      show_temp, store_temp, 1, 1),
 420};
 421
 422static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
 423        SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
 424                      show_temp, store_temp, 0, 2),
 425        SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
 426                      show_temp, store_temp, 1, 2),
 427};
 428
 429#define show_pwm_reg(reg) \
 430static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
 431                          char *buf) \
 432{ \
 433        struct w83l786ng_data *data = w83l786ng_update_device(dev); \
 434        int nr = to_sensor_dev_attr(attr)->index; \
 435        return sprintf(buf, "%d\n", data->reg[nr]); \
 436}
 437
 438show_pwm_reg(pwm_mode)
 439show_pwm_reg(pwm_enable)
 440show_pwm_reg(pwm)
 441
 442static ssize_t
 443store_pwm_mode(struct device *dev, struct device_attribute *attr,
 444               const char *buf, size_t count)
 445{
 446        int nr = to_sensor_dev_attr(attr)->index;
 447        struct i2c_client *client = to_i2c_client(dev);
 448        struct w83l786ng_data *data = i2c_get_clientdata(client);
 449        u8 reg;
 450        unsigned long val;
 451        int err;
 452
 453        err = kstrtoul(buf, 10, &val);
 454        if (err)
 455                return err;
 456
 457        if (val > 1)
 458                return -EINVAL;
 459        mutex_lock(&data->update_lock);
 460        data->pwm_mode[nr] = val;
 461        reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
 462        reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
 463        if (!val)
 464                reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
 465        w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
 466        mutex_unlock(&data->update_lock);
 467        return count;
 468}
 469
 470static ssize_t
 471store_pwm(struct device *dev, struct device_attribute *attr,
 472          const char *buf, size_t count)
 473{
 474        int nr = to_sensor_dev_attr(attr)->index;
 475        struct i2c_client *client = to_i2c_client(dev);
 476        struct w83l786ng_data *data = i2c_get_clientdata(client);
 477        unsigned long val;
 478        int err;
 479
 480        err = kstrtoul(buf, 10, &val);
 481        if (err)
 482                return err;
 483        val = SENSORS_LIMIT(val, 0, 255);
 484
 485        mutex_lock(&data->update_lock);
 486        data->pwm[nr] = val;
 487        w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
 488        mutex_unlock(&data->update_lock);
 489        return count;
 490}
 491
 492static ssize_t
 493store_pwm_enable(struct device *dev, struct device_attribute *attr,
 494                 const char *buf, size_t count)
 495{
 496        int nr = to_sensor_dev_attr(attr)->index;
 497        struct i2c_client *client = to_i2c_client(dev);
 498        struct w83l786ng_data *data = i2c_get_clientdata(client);
 499        u8 reg;
 500        unsigned long val;
 501        int err;
 502
 503        err = kstrtoul(buf, 10, &val);
 504        if (err)
 505                return err;
 506
 507        if (!val || val > 2)  /* only modes 1 and 2 are supported */
 508                return -EINVAL;
 509
 510        mutex_lock(&data->update_lock);
 511        reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
 512        data->pwm_enable[nr] = val;
 513        reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
 514        reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
 515        w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
 516        mutex_unlock(&data->update_lock);
 517        return count;
 518}
 519
 520static struct sensor_device_attribute sda_pwm[] = {
 521        SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
 522        SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
 523};
 524
 525static struct sensor_device_attribute sda_pwm_mode[] = {
 526        SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
 527                    store_pwm_mode, 0),
 528        SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
 529                    store_pwm_mode, 1),
 530};
 531
 532static struct sensor_device_attribute sda_pwm_enable[] = {
 533        SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
 534                    store_pwm_enable, 0),
 535        SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
 536                    store_pwm_enable, 1),
 537};
 538
 539/* For Smart Fan I/Thermal Cruise and Smart Fan II */
 540static ssize_t
 541show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
 542{
 543        int nr = to_sensor_dev_attr(attr)->index;
 544        struct w83l786ng_data *data = w83l786ng_update_device(dev);
 545        return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
 546}
 547
 548static ssize_t
 549store_tolerance(struct device *dev, struct device_attribute *attr,
 550                const char *buf, size_t count)
 551{
 552        int nr = to_sensor_dev_attr(attr)->index;
 553        struct i2c_client *client = to_i2c_client(dev);
 554        struct w83l786ng_data *data = i2c_get_clientdata(client);
 555        u8 tol_tmp, tol_mask;
 556        unsigned long val;
 557        int err;
 558
 559        err = kstrtoul(buf, 10, &val);
 560        if (err)
 561                return err;
 562
 563        mutex_lock(&data->update_lock);
 564        tol_mask = w83l786ng_read_value(client,
 565            W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
 566        tol_tmp = SENSORS_LIMIT(val, 0, 15);
 567        tol_tmp &= 0x0f;
 568        data->tolerance[nr] = tol_tmp;
 569        if (nr == 1)
 570                tol_tmp <<= 4;
 571
 572        w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
 573                              tol_mask | tol_tmp);
 574        mutex_unlock(&data->update_lock);
 575        return count;
 576}
 577
 578static struct sensor_device_attribute sda_tolerance[] = {
 579        SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
 580                    show_tolerance, store_tolerance, 0),
 581        SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
 582                    show_tolerance, store_tolerance, 1),
 583};
 584
 585
 586#define IN_UNIT_ATTRS(X)        \
 587        &sda_in_input[X].dev_attr.attr,         \
 588        &sda_in_min[X].dev_attr.attr,           \
 589        &sda_in_max[X].dev_attr.attr
 590
 591#define FAN_UNIT_ATTRS(X)       \
 592        &sda_fan_input[X].dev_attr.attr,        \
 593        &sda_fan_min[X].dev_attr.attr,          \
 594        &sda_fan_div[X].dev_attr.attr
 595
 596#define TEMP_UNIT_ATTRS(X)      \
 597        &sda_temp_input[X].dev_attr.attr,       \
 598        &sda_temp_max[X].dev_attr.attr,         \
 599        &sda_temp_max_hyst[X].dev_attr.attr
 600
 601#define PWM_UNIT_ATTRS(X)       \
 602        &sda_pwm[X].dev_attr.attr,              \
 603        &sda_pwm_mode[X].dev_attr.attr,         \
 604        &sda_pwm_enable[X].dev_attr.attr
 605
 606#define TOLERANCE_UNIT_ATTRS(X) \
 607        &sda_tolerance[X].dev_attr.attr
 608
 609static struct attribute *w83l786ng_attributes[] = {
 610        IN_UNIT_ATTRS(0),
 611        IN_UNIT_ATTRS(1),
 612        IN_UNIT_ATTRS(2),
 613        FAN_UNIT_ATTRS(0),
 614        FAN_UNIT_ATTRS(1),
 615        TEMP_UNIT_ATTRS(0),
 616        TEMP_UNIT_ATTRS(1),
 617        PWM_UNIT_ATTRS(0),
 618        PWM_UNIT_ATTRS(1),
 619        TOLERANCE_UNIT_ATTRS(0),
 620        TOLERANCE_UNIT_ATTRS(1),
 621        NULL
 622};
 623
 624static const struct attribute_group w83l786ng_group = {
 625        .attrs = w83l786ng_attributes,
 626};
 627
 628static int
 629w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info)
 630{
 631        struct i2c_adapter *adapter = client->adapter;
 632        u16 man_id;
 633        u8 chip_id;
 634
 635        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 636                return -ENODEV;
 637
 638        /* Detection */
 639        if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) {
 640                dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n",
 641                        client->addr);
 642                return -ENODEV;
 643        }
 644
 645        /* Identification */
 646        man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) +
 647                 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
 648        chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
 649
 650        if (man_id != 0x5CA3 ||         /* Winbond */
 651            chip_id != 0x80) {          /* W83L786NG */
 652                dev_dbg(&adapter->dev,
 653                        "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
 654                        man_id, chip_id);
 655                return -ENODEV;
 656        }
 657
 658        strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
 659
 660        return 0;
 661}
 662
 663static int
 664w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
 665{
 666        struct device *dev = &client->dev;
 667        struct w83l786ng_data *data;
 668        int i, err = 0;
 669        u8 reg_tmp;
 670
 671        data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL);
 672        if (!data) {
 673                err = -ENOMEM;
 674                goto exit;
 675        }
 676
 677        i2c_set_clientdata(client, data);
 678        mutex_init(&data->update_lock);
 679
 680        /* Initialize the chip */
 681        w83l786ng_init_client(client);
 682
 683        /* A few vars need to be filled upon startup */
 684        for (i = 0; i < 2; i++) {
 685                data->fan_min[i] = w83l786ng_read_value(client,
 686                    W83L786NG_REG_FAN_MIN(i));
 687        }
 688
 689        /* Update the fan divisor */
 690        reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
 691        data->fan_div[0] = reg_tmp & 0x07;
 692        data->fan_div[1] = (reg_tmp >> 4) & 0x07;
 693
 694        /* Register sysfs hooks */
 695        err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group);
 696        if (err)
 697                goto exit_remove;
 698
 699        data->hwmon_dev = hwmon_device_register(dev);
 700        if (IS_ERR(data->hwmon_dev)) {
 701                err = PTR_ERR(data->hwmon_dev);
 702                goto exit_remove;
 703        }
 704
 705        return 0;
 706
 707        /* Unregister sysfs hooks */
 708
 709exit_remove:
 710        sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
 711        kfree(data);
 712exit:
 713        return err;
 714}
 715
 716static int
 717w83l786ng_remove(struct i2c_client *client)
 718{
 719        struct w83l786ng_data *data = i2c_get_clientdata(client);
 720
 721        hwmon_device_unregister(data->hwmon_dev);
 722        sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
 723
 724        kfree(data);
 725
 726        return 0;
 727}
 728
 729static void
 730w83l786ng_init_client(struct i2c_client *client)
 731{
 732        u8 tmp;
 733
 734        if (reset)
 735                w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
 736
 737        /* Start monitoring */
 738        tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
 739        if (!(tmp & 0x01))
 740                w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
 741}
 742
 743static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
 744{
 745        struct i2c_client *client = to_i2c_client(dev);
 746        struct w83l786ng_data *data = i2c_get_clientdata(client);
 747        int i, j;
 748        u8 reg_tmp, pwmcfg;
 749
 750        mutex_lock(&data->update_lock);
 751        if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 752            || !data->valid) {
 753                dev_dbg(&client->dev, "Updating w83l786ng data.\n");
 754
 755                /* Update the voltages measured value and limits */
 756                for (i = 0; i < 3; i++) {
 757                        data->in[i] = w83l786ng_read_value(client,
 758                            W83L786NG_REG_IN(i));
 759                        data->in_min[i] = w83l786ng_read_value(client,
 760                            W83L786NG_REG_IN_MIN(i));
 761                        data->in_max[i] = w83l786ng_read_value(client,
 762                            W83L786NG_REG_IN_MAX(i));
 763                }
 764
 765                /* Update the fan counts and limits */
 766                for (i = 0; i < 2; i++) {
 767                        data->fan[i] = w83l786ng_read_value(client,
 768                            W83L786NG_REG_FAN(i));
 769                        data->fan_min[i] = w83l786ng_read_value(client,
 770                            W83L786NG_REG_FAN_MIN(i));
 771                }
 772
 773                /* Update the fan divisor */
 774                reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
 775                data->fan_div[0] = reg_tmp & 0x07;
 776                data->fan_div[1] = (reg_tmp >> 4) & 0x07;
 777
 778                pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
 779                for (i = 0; i < 2; i++) {
 780                        data->pwm_mode[i] =
 781                            ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
 782                            ? 0 : 1;
 783                        data->pwm_enable[i] =
 784                            ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1;
 785                        data->pwm[i] = w83l786ng_read_value(client,
 786                            W83L786NG_REG_PWM[i]);
 787                }
 788
 789
 790                /* Update the temperature sensors */
 791                for (i = 0; i < 2; i++) {
 792                        for (j = 0; j < 3; j++) {
 793                                data->temp[i][j] = w83l786ng_read_value(client,
 794                                    W83L786NG_REG_TEMP[i][j]);
 795                        }
 796                }
 797
 798                /* Update Smart Fan I/II tolerance */
 799                reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
 800                data->tolerance[0] = reg_tmp & 0x0f;
 801                data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
 802
 803                data->last_updated = jiffies;
 804                data->valid = 1;
 805
 806        }
 807
 808        mutex_unlock(&data->update_lock);
 809
 810        return data;
 811}
 812
 813module_i2c_driver(w83l786ng_driver);
 814
 815MODULE_AUTHOR("Kevin Lo");
 816MODULE_DESCRIPTION("w83l786ng driver");
 817MODULE_LICENSE("GPL");
 818
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.