release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/hwmon/w83l786ng.c

   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 */
  38 static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
  39
  40 /* Insmod parameters */
  41
  42 static int reset;
  43 module_param(reset, bool, 0);
  44 MODULE_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
  67 static 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
  76 static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
  77 static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
  78
  79 /* FAN Duty Cycle, be used to control */
  80 static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
  81
  82
  83 static inline u8
  84 FAN_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 ? (val)+0x100*1000 \
  98                                     : (val)) / 1000, 0, 0xff))
  99 #define TEMP_FROM_REG(val)      (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
 100
 101 /* The analog voltage inputs have 8mV LSB. Since the sysfs output is
 102    in mV as would be measured on the chip input pin, need to just
 103    multiply/divide by 8 to translate from/to register values. */
 104 #define IN_TO_REG(val)          (SENSORS_LIMIT((((val) + 4) / 8), 0, 255))
 105 #define IN_FROM_REG(val)        ((val) * 8)
 106
 107 #define DIV_FROM_REG(val)       (1 << (val))
 108
 109 static inline u8
 110 DIV_TO_REG(long val)
 111 {
 112         int i;
 113         val = SENSORS_LIMIT(val, 1, 128) >> 1;
 114         for (i = 0; i < 7; i++) {
 115                 if (val == 0)
 116                         break;
 117                 val >>= 1;
 118         }
 119         return ((u8) i);
 120 }
 121
 122 struct w83l786ng_data {
 123         struct device *hwmon_dev;
 124         struct mutex update_lock;
 125         char valid;                     /* !=0 if following fields are valid */
 126         unsigned long last_updated;     /* In jiffies */
 127         unsigned long last_nonvolatile; /* In jiffies, last time we update the
 128                                            nonvolatile registers */
 129
 130         u8 in[3];
 131         u8 in_max[3];
 132         u8 in_min[3];
 133         u8 fan[2];
 134         u8 fan_div[2];
 135         u8 fan_min[2];
 136         u8 temp_type[2];
 137         u8 temp[2][3];
 138         u8 pwm[2];
 139         u8 pwm_mode[2]; /* 0->DC variable voltage
 140                            1->PWM variable duty cycle */
 141
 142         u8 pwm_enable[2]; /* 1->manual
 143                              2->thermal cruise (also called SmartFan I) */
 144         u8 tolerance[2];
 145 };
 146
 147 static int w83l786ng_probe(struct i2c_client *client,
 148                            const struct i2c_device_id *id);
 149 static int w83l786ng_detect(struct i2c_client *client,
 150                             struct i2c_board_info *info);
 151 static int w83l786ng_remove(struct i2c_client *client);
 152 static void w83l786ng_init_client(struct i2c_client *client);
 153 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev);
 154
 155 static const struct i2c_device_id w83l786ng_id[] = {
 156         { "w83l786ng", 0 },
 157         { }
 158 };
 159 MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
 160
 161 static struct i2c_driver w83l786ng_driver = {
 162         .class          = I2C_CLASS_HWMON,
 163         .driver = {
 164                    .name = "w83l786ng",
 165         },
 166         .probe          = w83l786ng_probe,
 167         .remove         = w83l786ng_remove,
 168         .id_table       = w83l786ng_id,
 169         .detect         = w83l786ng_detect,
 170         .address_list   = normal_i2c,
 171 };
 172
 173 static u8
 174 w83l786ng_read_value(struct i2c_client *client, u8 reg)
 175 {
 176         return i2c_smbus_read_byte_data(client, reg);
 177 }
 178
 179 static int
 180 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
 181 {
 182         return i2c_smbus_write_byte_data(client, reg, value);
 183 }
 184
 185 /* following are the sysfs callback functions */
 186 #define show_in_reg(reg) \
 187 static ssize_t \
 188 show_##reg(struct device *dev, struct device_attribute *attr, \
 189            char *buf) \
 190 { \
 191         int nr = to_sensor_dev_attr(attr)->index; \
 192         struct w83l786ng_data *data = w83l786ng_update_device(dev); \
 193         return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \
 194 }
 195
 196 show_in_reg(in)
 197 show_in_reg(in_min)
 198 show_in_reg(in_max)
 199
 200 #define store_in_reg(REG, reg) \
 201 static ssize_t \
 202 store_in_##reg (struct device *dev, struct device_attribute *attr, \
 203                 const char *buf, size_t count) \
 204 { \
 205         int nr = to_sensor_dev_attr(attr)->index; \
 206         struct i2c_client *client = to_i2c_client(dev); \
 207         struct w83l786ng_data *data = i2c_get_clientdata(client); \
 208         unsigned long val = simple_strtoul(buf, NULL, 10); \
 209         mutex_lock(&data->update_lock); \
 210         data->in_##reg[nr] = IN_TO_REG(val); \
 211         w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
 212                               data->in_##reg[nr]); \
 213         mutex_unlock(&data->update_lock); \
 214         return count; \
 215 }
 216
 217 store_in_reg(MIN, min)
 218 store_in_reg(MAX, max)
 219
 220 static struct sensor_device_attribute sda_in_input[] = {
 221         SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
 222         SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
 223         SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
 224 };
 225
 226 static struct sensor_device_attribute sda_in_min[] = {
 227         SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
 228         SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
 229         SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
 230 };
 231
 232 static struct sensor_device_attribute sda_in_max[] = {
 233         SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
 234         SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
 235         SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
 236 };
 237
 238 #define show_fan_reg(reg) \
 239 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
 240                           char *buf) \
 241 { \
 242         int nr = to_sensor_dev_attr(attr)->index; \
 243         struct w83l786ng_data *data = w83l786ng_update_device(dev); \
 244         return sprintf(buf,"%d\n", \
 245                 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \
 246 }
 247
 248 show_fan_reg(fan);
 249 show_fan_reg(fan_min);
 250
 251 static ssize_t
 252 store_fan_min(struct device *dev, struct device_attribute *attr,
 253               const char *buf, size_t count)
 254 {
 255         int nr = to_sensor_dev_attr(attr)->index;
 256         struct i2c_client *client = to_i2c_client(dev);
 257         struct w83l786ng_data *data = i2c_get_clientdata(client);
 258         u32 val;
 259
 260         val = simple_strtoul(buf, NULL, 10);
 261         mutex_lock(&data->update_lock);
 262         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 263         w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
 264                               data->fan_min[nr]);
 265         mutex_unlock(&data->update_lock);
 266
 267         return count;
 268 }
 269
 270 static ssize_t
 271 show_fan_div(struct device *dev, struct device_attribute *attr,
 272              char *buf)
 273 {
 274         int nr = to_sensor_dev_attr(attr)->index;
 275         struct w83l786ng_data *data = w83l786ng_update_device(dev);
 276         return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
 277 }
 278
 279 /* Note: we save and restore the fan minimum here, because its value is
 280    determined in part by the fan divisor.  This follows the principle of
 281    least surprise; the user doesn't expect the fan minimum to change just
 282    because the divisor changed. */
 283 static ssize_t
 284 store_fan_div(struct device *dev, struct device_attribute *attr,
 285               const char *buf, size_t count)
 286 {
 287         int nr = to_sensor_dev_attr(attr)->index;
 288         struct i2c_client *client = to_i2c_client(dev);
 289         struct w83l786ng_data *data = i2c_get_clientdata(client);
 290
 291         unsigned long min;
 292         u8 tmp_fan_div;
 293         u8 fan_div_reg;
 294         u8 keep_mask = 0;
 295         u8 new_shift = 0;
 296
 297         /* Save fan_min */
 298         mutex_lock(&data->update_lock);
 299         min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 300
 301         data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10));
 302
 303         switch (nr) {
 304         case 0:
 305                 keep_mask = 0xf8;
 306                 new_shift = 0;
 307                 break;
 308         case 1:
 309                 keep_mask = 0x8f;
 310                 new_shift = 4;
 311                 break;
 312         }
 313
 314         fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
 315                                            & keep_mask;
 316
 317         tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
 318
 319         w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
 320                               fan_div_reg | tmp_fan_div);
 321
 322         /* Restore fan_min */
 323         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 324         w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
 325                               data->fan_min[nr]);
 326         mutex_unlock(&data->update_lock);
 327
 328         return count;
 329 }
 330
 331 static struct sensor_device_attribute sda_fan_input[] = {
 332         SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
 333         SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
 334 };
 335
 336 static struct sensor_device_attribute sda_fan_min[] = {
 337         SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
 338                     store_fan_min, 0),
 339         SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
 340                     store_fan_min, 1),
 341 };
 342
 343 static struct sensor_device_attribute sda_fan_div[] = {
 344         SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
 345                     store_fan_div, 0),
 346         SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
 347                     store_fan_div, 1),
 348 };
 349
 350
 351 /* read/write the temperature, includes measured value and limits */
 352
 353 static ssize_t
 354 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 355 {
 356         struct sensor_device_attribute_2 *sensor_attr =
 357             to_sensor_dev_attr_2(attr);
 358         int nr = sensor_attr->nr;
 359         int index = sensor_attr->index;
 360         struct w83l786ng_data *data = w83l786ng_update_device(dev);
 361         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
 362 }
 363
 364 static ssize_t
 365 store_temp(struct device *dev, struct device_attribute *attr,
 366            const char *buf, size_t count)
 367 {
 368         struct sensor_device_attribute_2 *sensor_attr =
 369             to_sensor_dev_attr_2(attr);
 370         int nr = sensor_attr->nr;
 371         int index = sensor_attr->index;
 372         struct i2c_client *client = to_i2c_client(dev);
 373         struct w83l786ng_data *data = i2c_get_clientdata(client);
 374         s32 val;
 375
 376         val = simple_strtol(buf, NULL, 10);
 377         mutex_lock(&data->update_lock);
 378         data->temp[nr][index] = TEMP_TO_REG(val);
 379         w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
 380                               data->temp[nr][index]);
 381         mutex_unlock(&data->update_lock);
 382
 383         return count;
 384 }
 385
 386 static struct sensor_device_attribute_2 sda_temp_input[] = {
 387         SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
 388         SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
 389 };
 390
 391 static struct sensor_device_attribute_2 sda_temp_max[] = {
 392         SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
 393                       show_temp, store_temp, 0, 1),
 394         SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
 395                       show_temp, store_temp, 1, 1),
 396 };
 397
 398 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
 399         SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
 400                       show_temp, store_temp, 0, 2),
 401         SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
 402                       show_temp, store_temp, 1, 2),
 403 };
 404
 405 #define show_pwm_reg(reg) \
 406 static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \
 407                            char *buf) \
 408 { \
 409         struct w83l786ng_data *data = w83l786ng_update_device(dev); \
 410         int nr = to_sensor_dev_attr(attr)->index; \
 411         return sprintf(buf, "%d\n", data->reg[nr]); \
 412 }
 413
 414 show_pwm_reg(pwm_mode)
 415 show_pwm_reg(pwm_enable)
 416 show_pwm_reg(pwm)
 417
 418 static ssize_t
 419 store_pwm_mode(struct device *dev, struct device_attribute *attr,
 420                const char *buf, size_t count)
 421 {
 422         int nr = to_sensor_dev_attr(attr)->index;
 423         struct i2c_client *client = to_i2c_client(dev);
 424         struct w83l786ng_data *data = i2c_get_clientdata(client);
 425         u32 val = simple_strtoul(buf, NULL, 10);
 426         u8 reg;
 427
 428         if (val > 1)
 429                 return -EINVAL;
 430         mutex_lock(&data->update_lock);
 431         data->pwm_mode[nr] = val;
 432         reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
 433         reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
 434         if (!val)
 435                 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
 436         w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
 437         mutex_unlock(&data->update_lock);
 438         return count;
 439 }
 440
 441 static ssize_t
 442 store_pwm(struct device *dev, struct device_attribute *attr,
 443           const char *buf, size_t count)
 444 {
 445         int nr = to_sensor_dev_attr(attr)->index;
 446         struct i2c_client *client = to_i2c_client(dev);
 447         struct w83l786ng_data *data = i2c_get_clientdata(client);
 448         u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255);
 449
 450         mutex_lock(&data->update_lock);
 451         data->pwm[nr] = val;
 452         w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
 453         mutex_unlock(&data->update_lock);
 454         return count;
 455 }
 456
 457 static ssize_t
 458 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 459                  const char *buf, size_t count)
 460 {
 461         int nr = to_sensor_dev_attr(attr)->index;
 462         struct i2c_client *client = to_i2c_client(dev);
 463         struct w83l786ng_data *data = i2c_get_clientdata(client);
 464         u32 val = simple_strtoul(buf, NULL, 10);
 465
 466         u8 reg;
 467
 468         if (!val || (val > 2))  /* only modes 1 and 2 are supported */
 469                 return -EINVAL;
 470
 471         mutex_lock(&data->update_lock);
 472         reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
 473         data->pwm_enable[nr] = val;
 474         reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
 475         reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
 476         w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
 477         mutex_unlock(&data->update_lock);
 478         return count;
 479 }
 480
 481 static struct sensor_device_attribute sda_pwm[] = {
 482         SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
 483         SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
 484 };
 485
 486 static struct sensor_device_attribute sda_pwm_mode[] = {
 487         SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
 488                     store_pwm_mode, 0),
 489         SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
 490                     store_pwm_mode, 1),
 491 };
 492
 493 static struct sensor_device_attribute sda_pwm_enable[] = {
 494         SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
 495                     store_pwm_enable, 0),
 496         SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
 497                     store_pwm_enable, 1),
 498 };
 499
 500 /* For Smart Fan I/Thermal Cruise and Smart Fan II */
 501 static ssize_t
 502 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
 503 {
 504         int nr = to_sensor_dev_attr(attr)->index;
 505         struct w83l786ng_data *data = w83l786ng_update_device(dev);
 506         return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
 507 }
 508
 509 static ssize_t
 510 store_tolerance(struct device *dev, struct device_attribute *attr,
 511                 const char *buf, size_t count)
 512 {
 513         int nr = to_sensor_dev_attr(attr)->index;
 514         struct i2c_client *client = to_i2c_client(dev);
 515         struct w83l786ng_data *data = i2c_get_clientdata(client);
 516         u32 val;
 517         u8 tol_tmp, tol_mask;
 518
 519         val = simple_strtoul(buf, NULL, 10);
 520
 521         mutex_lock(&data->update_lock);
 522         tol_mask = w83l786ng_read_value(client,
 523             W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
 524         tol_tmp = SENSORS_LIMIT(val, 0, 15);
 525         tol_tmp &= 0x0f;
 526         data->tolerance[nr] = tol_tmp;
 527         if (nr == 1) {
 528                 tol_tmp <<= 4;
 529         }
 530
 531         w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
 532                               tol_mask | tol_tmp);
 533         mutex_unlock(&data->update_lock);
 534         return count;
 535 }
 536
 537 static struct sensor_device_attribute sda_tolerance[] = {
 538         SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
 539                     show_tolerance, store_tolerance, 0),
 540         SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
 541                     show_tolerance, store_tolerance, 1),
 542 };
 543
 544
 545 #define IN_UNIT_ATTRS(X)        \
 546         &sda_in_input[X].dev_attr.attr,         \
 547         &sda_in_min[X].dev_attr.attr,           \
 548         &sda_in_max[X].dev_attr.attr
 549
 550 #define FAN_UNIT_ATTRS(X)       \
 551         &sda_fan_input[X].dev_attr.attr,        \
 552         &sda_fan_min[X].dev_attr.attr,          \
 553         &sda_fan_div[X].dev_attr.attr
 554
 555 #define TEMP_UNIT_ATTRS(X)      \
 556         &sda_temp_input[X].dev_attr.attr,       \
 557         &sda_temp_max[X].dev_attr.attr,         \
 558         &sda_temp_max_hyst[X].dev_attr.attr
 559
 560 #define PWM_UNIT_ATTRS(X)       \
 561         &sda_pwm[X].dev_attr.attr,              \
 562         &sda_pwm_mode[X].dev_attr.attr,         \
 563         &sda_pwm_enable[X].dev_attr.attr
 564
 565 #define TOLERANCE_UNIT_ATTRS(X) \
 566         &sda_tolerance[X].dev_attr.attr
 567
 568 static struct attribute *w83l786ng_attributes[] = {
 569         IN_UNIT_ATTRS(0),
 570         IN_UNIT_ATTRS(1),
 571         IN_UNIT_ATTRS(2),
 572         FAN_UNIT_ATTRS(0),
 573         FAN_UNIT_ATTRS(1),
 574         TEMP_UNIT_ATTRS(0),
 575         TEMP_UNIT_ATTRS(1),
 576         PWM_UNIT_ATTRS(0),
 577         PWM_UNIT_ATTRS(1),
 578         TOLERANCE_UNIT_ATTRS(0),
 579         TOLERANCE_UNIT_ATTRS(1),
 580         NULL
 581 };
 582
 583 static const struct attribute_group w83l786ng_group = {
 584         .attrs = w83l786ng_attributes,
 585 };
 586
 587 static int
 588 w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info)
 589 {
 590         struct i2c_adapter *adapter = client->adapter;
 591         u16 man_id;
 592         u8 chip_id;
 593
 594         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 595                 return -ENODEV;
 596         }
 597
 598         /* Detection */
 599         if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) {
 600                 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n",
 601                         client->addr);
 602                 return -ENODEV;
 603         }
 604
 605         /* Identification */
 606         man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) +
 607                  w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
 608         chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
 609
 610         if (man_id != 0x5CA3 ||         /* Winbond */
 611             chip_id != 0x80) {          /* W83L786NG */
 612                 dev_dbg(&adapter->dev,
 613                         "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
 614                         man_id, chip_id);
 615                 return -ENODEV;
 616         }
 617
 618         strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
 619
 620         return 0;
 621 }
 622
 623 static int
 624 w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
 625 {
 626         struct device *dev = &client->dev;
 627         struct w83l786ng_data *data;
 628         int i, err = 0;
 629         u8 reg_tmp;
 630
 631         data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL);
 632         if (!data) {
 633                 err = -ENOMEM;
 634                 goto exit;
 635         }
 636
 637         i2c_set_clientdata(client, data);
 638         mutex_init(&data->update_lock);
 639
 640         /* Initialize the chip */
 641         w83l786ng_init_client(client);
 642
 643         /* A few vars need to be filled upon startup */
 644         for (i = 0; i < 2; i++) {
 645                 data->fan_min[i] = w83l786ng_read_value(client,
 646                     W83L786NG_REG_FAN_MIN(i));
 647         }
 648
 649         /* Update the fan divisor */
 650         reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
 651         data->fan_div[0] = reg_tmp & 0x07;
 652         data->fan_div[1] = (reg_tmp >> 4) & 0x07;
 653
 654         /* Register sysfs hooks */
 655         if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group)))
 656                 goto exit_remove;
 657
 658         data->hwmon_dev = hwmon_device_register(dev);
 659         if (IS_ERR(data->hwmon_dev)) {
 660                 err = PTR_ERR(data->hwmon_dev);
 661                 goto exit_remove;
 662         }
 663
 664         return 0;
 665
 666         /* Unregister sysfs hooks */
 667
 668 exit_remove:
 669         sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
 670         kfree(data);
 671 exit:
 672         return err;
 673 }
 674
 675 static int
 676 w83l786ng_remove(struct i2c_client *client)
 677 {
 678         struct w83l786ng_data *data = i2c_get_clientdata(client);
 679
 680         hwmon_device_unregister(data->hwmon_dev);
 681         sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
 682
 683         kfree(data);
 684
 685         return 0;
 686 }
 687
 688 static void
 689 w83l786ng_init_client(struct i2c_client *client)
 690 {
 691         u8 tmp;
 692
 693         if (reset)
 694                 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
 695
 696         /* Start monitoring */
 697         tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
 698         if (!(tmp & 0x01))
 699                 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
 700 }
 701
 702 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
 703 {
 704         struct i2c_client *client = to_i2c_client(dev);
 705         struct w83l786ng_data *data = i2c_get_clientdata(client);
 706         int i, j;
 707         u8 reg_tmp, pwmcfg;
 708
 709         mutex_lock(&data->update_lock);
 710         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 711             || !data->valid) {
 712                 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
 713
 714                 /* Update the voltages measured value and limits */
 715                 for (i = 0; i < 3; i++) {
 716                         data->in[i] = w83l786ng_read_value(client,
 717                             W83L786NG_REG_IN(i));
 718                         data->in_min[i] = w83l786ng_read_value(client,
 719                             W83L786NG_REG_IN_MIN(i));
 720                         data->in_max[i] = w83l786ng_read_value(client,
 721                             W83L786NG_REG_IN_MAX(i));
 722                 }
 723
 724                 /* Update the fan counts and limits */
 725                 for (i = 0; i < 2; i++) {
 726                         data->fan[i] = w83l786ng_read_value(client,
 727                             W83L786NG_REG_FAN(i));
 728                         data->fan_min[i] = w83l786ng_read_value(client,
 729                             W83L786NG_REG_FAN_MIN(i));
 730                 }
 731
 732                 /* Update the fan divisor */
 733                 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
 734                 data->fan_div[0] = reg_tmp & 0x07;
 735                 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
 736
 737                 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
 738                 for (i = 0; i < 2; i++) {
 739                         data->pwm_mode[i] =
 740                             ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
 741                             ? 0 : 1;
 742                         data->pwm_enable[i] =
 743                             ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1;
 744                         data->pwm[i] = w83l786ng_read_value(client,
 745                             W83L786NG_REG_PWM[i]);
 746                 }
 747
 748
 749                 /* Update the temperature sensors */
 750                 for (i = 0; i < 2; i++) {
 751                         for (j = 0; j < 3; j++) {
 752                                 data->temp[i][j] = w83l786ng_read_value(client,
 753                                     W83L786NG_REG_TEMP[i][j]);
 754                         }
 755                 }
 756
 757                 /* Update Smart Fan I/II tolerance */
 758                 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
 759                 data->tolerance[0] = reg_tmp & 0x0f;
 760                 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
 761
 762                 data->last_updated = jiffies;
 763                 data->valid = 1;
 764
 765         }
 766
 767         mutex_unlock(&data->update_lock);
 768
 769         return data;
 770 }
 771
 772 static int __init
 773 sensors_w83l786ng_init(void)
 774 {
 775         return i2c_add_driver(&w83l786ng_driver);
 776 }
 777
 778 static void __exit
 779 sensors_w83l786ng_exit(void)
 780 {
 781         i2c_del_driver(&w83l786ng_driver);
 782 }
 783
 784 MODULE_AUTHOR("Kevin Lo");
 785 MODULE_DESCRIPTION("w83l786ng driver");
 786 MODULE_LICENSE("GPL");
 787
 788 module_init(sensors_w83l786ng_init);
 789 module_exit(sensors_w83l786ng_exit);