drivers/hwmon/f75375s.c

   1 /*
   2  * f75375s.c - driver for the Fintek F75375/SP, F75373 and
   3  *             F75387SG/RG hardware monitoring features
   4  * Copyright (C) 2006-2007  Riku Voipio
   5  *
   6  * Datasheets available at:
   7  *
   8  * f75375:
   9  * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf
  10  *
  11  * f75373:
  12  * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf
  13  *
  14  * f75387:
  15  * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  30  *
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/jiffies.h>
  35 #include <linux/hwmon.h>
  36 #include <linux/hwmon-sysfs.h>
  37 #include <linux/i2c.h>
  38 #include <linux/err.h>
  39 #include <linux/mutex.h>
  40 #include <linux/f75375s.h>
  41 #include <linux/slab.h>
  42
  43 /* Addresses to scan */
  44 static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
  45
  46 enum chips { f75373, f75375, f75387 };
  47
  48 /* Fintek F75375 registers  */
  49 #define F75375_REG_CONFIG0              0x0
  50 #define F75375_REG_CONFIG1              0x1
  51 #define F75375_REG_CONFIG2              0x2
  52 #define F75375_REG_CONFIG3              0x3
  53 #define F75375_REG_ADDR                 0x4
  54 #define F75375_REG_INTR                 0x31
  55 #define F75375_CHIP_ID                  0x5A
  56 #define F75375_REG_VERSION              0x5C
  57 #define F75375_REG_VENDOR               0x5D
  58 #define F75375_REG_FAN_TIMER            0x60
  59
  60 #define F75375_REG_VOLT(nr)             (0x10 + (nr))
  61 #define F75375_REG_VOLT_HIGH(nr)        (0x20 + (nr) * 2)
  62 #define F75375_REG_VOLT_LOW(nr)         (0x21 + (nr) * 2)
  63
  64 #define F75375_REG_TEMP(nr)             (0x14 + (nr))
  65 #define F75387_REG_TEMP11_LSB(nr)       (0x1a + (nr))
  66 #define F75375_REG_TEMP_HIGH(nr)        (0x28 + (nr) * 2)
  67 #define F75375_REG_TEMP_HYST(nr)        (0x29 + (nr) * 2)
  68
  69 #define F75375_REG_FAN(nr)              (0x16 + (nr) * 2)
  70 #define F75375_REG_FAN_MIN(nr)          (0x2C + (nr) * 2)
  71 #define F75375_REG_FAN_FULL(nr)         (0x70 + (nr) * 0x10)
  72 #define F75375_REG_FAN_PWM_DUTY(nr)     (0x76 + (nr) * 0x10)
  73 #define F75375_REG_FAN_PWM_CLOCK(nr)    (0x7D + (nr) * 0x10)
  74
  75 #define F75375_REG_FAN_EXP(nr)          (0x74 + (nr) * 0x10)
  76 #define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
  77 #define F75375_REG_FAN_B_SPEED(nr, step) \
  78         ((0xA5 + (nr) * 0x10) + (step) * 2)
  79
  80 #define F75375_REG_PWM1_RAISE_DUTY      0x69
  81 #define F75375_REG_PWM2_RAISE_DUTY      0x6A
  82 #define F75375_REG_PWM1_DROP_DUTY       0x6B
  83 #define F75375_REG_PWM2_DROP_DUTY       0x6C
  84
  85 #define F75375_FAN_CTRL_LINEAR(nr)      (4 + nr)
  86 #define F75387_FAN_CTRL_LINEAR(nr)      (1 + ((nr) * 4))
  87 #define FAN_CTRL_MODE(nr)               (4 + ((nr) * 2))
  88 #define F75387_FAN_DUTY_MODE(nr)        (2 + ((nr) * 4))
  89 #define F75387_FAN_MANU_MODE(nr)        ((nr) * 4)
  90
  91 /*
  92  * Data structures and manipulation thereof
  93  */
  94
  95 struct f75375_data {
  96         unsigned short addr;
  97         struct device *hwmon_dev;
  98
  99         const char *name;
 100         int kind;
 101         struct mutex update_lock; /* protect register access */
 102         char valid;
 103         unsigned long last_updated;     /* In jiffies */
 104         unsigned long last_limits;      /* In jiffies */
 105
 106         /* Register values */
 107         u8 in[4];
 108         u8 in_max[4];
 109         u8 in_min[4];
 110         u16 fan[2];
 111         u16 fan_min[2];
 112         u16 fan_max[2];
 113         u16 fan_target[2];
 114         u8 fan_timer;
 115         u8 pwm[2];
 116         u8 pwm_mode[2];
 117         u8 pwm_enable[2];
 118         /*
 119          * f75387: For remote temperature reading, it uses signed 11-bit
 120          * values with LSB = 0.125 degree Celsius, left-justified in 16-bit
 121          * registers. For original 8-bit temp readings, the LSB just is 0.
 122          */
 123         s16 temp11[2];
 124         s8 temp_high[2];
 125         s8 temp_max_hyst[2];
 126 };
 127
 128 static int f75375_detect(struct i2c_client *client,
 129                          struct i2c_board_info *info);
 130 static int f75375_probe(struct i2c_client *client,
 131                         const struct i2c_device_id *id);
 132 static int f75375_remove(struct i2c_client *client);
 133
 134 static const struct i2c_device_id f75375_id[] = {
 135         { "f75373", f75373 },
 136         { "f75375", f75375 },
 137         { "f75387", f75387 },
 138         { }
 139 };
 140 MODULE_DEVICE_TABLE(i2c, f75375_id);
 141
 142 static struct i2c_driver f75375_driver = {
 143         .class = I2C_CLASS_HWMON,
 144         .driver = {
 145                 .name = "f75375",
 146         },
 147         .probe = f75375_probe,
 148         .remove = f75375_remove,
 149         .id_table = f75375_id,
 150         .detect = f75375_detect,
 151         .address_list = normal_i2c,
 152 };
 153
 154 static inline int f75375_read8(struct i2c_client *client, u8 reg)
 155 {
 156         return i2c_smbus_read_byte_data(client, reg);
 157 }
 158
 159 /* in most cases, should be called while holding update_lock */
 160 static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
 161 {
 162         return (i2c_smbus_read_byte_data(client, reg) << 8)
 163                 | i2c_smbus_read_byte_data(client, reg + 1);
 164 }
 165
 166 static inline void f75375_write8(struct i2c_client *client, u8 reg,
 167                 u8 value)
 168 {
 169         i2c_smbus_write_byte_data(client, reg, value);
 170 }
 171
 172 static inline void f75375_write16(struct i2c_client *client, u8 reg,
 173                 u16 value)
 174 {
 175         int err = i2c_smbus_write_byte_data(client, reg, (value << 8));
 176         if (err)
 177                 return;
 178         i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
 179 }
 180
 181 static struct f75375_data *f75375_update_device(struct device *dev)
 182 {
 183         struct i2c_client *client = to_i2c_client(dev);
 184         struct f75375_data *data = i2c_get_clientdata(client);
 185         int nr;
 186
 187         mutex_lock(&data->update_lock);
 188
 189         /* Limit registers cache is refreshed after 60 seconds */
 190         if (time_after(jiffies, data->last_limits + 60 * HZ)
 191                 || !data->valid) {
 192                 for (nr = 0; nr < 2; nr++) {
 193                         data->temp_high[nr] =
 194                                 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
 195                         data->temp_max_hyst[nr] =
 196                                 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
 197                         data->fan_max[nr] =
 198                                 f75375_read16(client, F75375_REG_FAN_FULL(nr));
 199                         data->fan_min[nr] =
 200                                 f75375_read16(client, F75375_REG_FAN_MIN(nr));
 201                         data->fan_target[nr] =
 202                                 f75375_read16(client, F75375_REG_FAN_EXP(nr));
 203                         data->pwm[nr] = f75375_read8(client,
 204                                 F75375_REG_FAN_PWM_DUTY(nr));
 205
 206                 }
 207                 for (nr = 0; nr < 4; nr++) {
 208                         data->in_max[nr] =
 209                                 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
 210                         data->in_min[nr] =
 211                                 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
 212                 }
 213                 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
 214                 data->last_limits = jiffies;
 215         }
 216
 217         /* Measurement registers cache is refreshed after 2 second */
 218         if (time_after(jiffies, data->last_updated + 2 * HZ)
 219                 || !data->valid) {
 220                 for (nr = 0; nr < 2; nr++) {
 221                         /* assign MSB, therefore shift it by 8 bits */
 222                         data->temp11[nr] =
 223                                 f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
 224                         if (data->kind == f75387)
 225                                 /* merge F75387's temperature LSB (11-bit) */
 226                                 data->temp11[nr] |=
 227                                         f75375_read8(client,
 228                                                      F75387_REG_TEMP11_LSB(nr));
 229                         data->fan[nr] =
 230                                 f75375_read16(client, F75375_REG_FAN(nr));
 231                 }
 232                 for (nr = 0; nr < 4; nr++)
 233                         data->in[nr] =
 234                                 f75375_read8(client, F75375_REG_VOLT(nr));
 235
 236                 data->last_updated = jiffies;
 237                 data->valid = 1;
 238         }
 239
 240         mutex_unlock(&data->update_lock);
 241         return data;
 242 }
 243
 244 static inline u16 rpm_from_reg(u16 reg)
 245 {
 246         if (reg == 0 || reg == 0xffff)
 247                 return 0;
 248         return 1500000 / reg;
 249 }
 250
 251 static inline u16 rpm_to_reg(int rpm)
 252 {
 253         if (rpm < 367 || rpm > 0xffff)
 254                 return 0xffff;
 255         return 1500000 / rpm;
 256 }
 257
 258 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 259                 const char *buf, size_t count)
 260 {
 261         int nr = to_sensor_dev_attr(attr)->index;
 262         struct i2c_client *client = to_i2c_client(dev);
 263         struct f75375_data *data = i2c_get_clientdata(client);
 264         unsigned long val;
 265         int err;
 266
 267         err = kstrtoul(buf, 10, &val);
 268         if (err < 0)
 269                 return err;
 270
 271         mutex_lock(&data->update_lock);
 272         data->fan_min[nr] = rpm_to_reg(val);
 273         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
 274         mutex_unlock(&data->update_lock);
 275         return count;
 276 }
 277
 278 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
 279                 const char *buf, size_t count)
 280 {
 281         int nr = to_sensor_dev_attr(attr)->index;
 282         struct i2c_client *client = to_i2c_client(dev);
 283         struct f75375_data *data = i2c_get_clientdata(client);
 284         unsigned long val;
 285         int err;
 286
 287         err = kstrtoul(buf, 10, &val);
 288         if (err < 0)
 289                 return err;
 290
 291         mutex_lock(&data->update_lock);
 292         data->fan_target[nr] = rpm_to_reg(val);
 293         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
 294         mutex_unlock(&data->update_lock);
 295         return count;
 296 }
 297
 298 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 299                 const char *buf, size_t count)
 300 {
 301         int nr = to_sensor_dev_attr(attr)->index;
 302         struct i2c_client *client = to_i2c_client(dev);
 303         struct f75375_data *data = i2c_get_clientdata(client);
 304         unsigned long val;
 305         int err;
 306
 307         err = kstrtoul(buf, 10, &val);
 308         if (err < 0)
 309                 return err;
 310
 311         mutex_lock(&data->update_lock);
 312         data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
 313         f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr), data->pwm[nr]);
 314         mutex_unlock(&data->update_lock);
 315         return count;
 316 }
 317
 318 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 319                 *attr, char *buf)
 320 {
 321         int nr = to_sensor_dev_attr(attr)->index;
 322         struct f75375_data *data = f75375_update_device(dev);
 323         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
 324 }
 325
 326 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
 327 {
 328         struct f75375_data *data = i2c_get_clientdata(client);
 329         u8 fanmode;
 330
 331         if (val < 0 || val > 3)
 332                 return -EINVAL;
 333
 334         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
 335         if (data->kind == f75387) {
 336                 /* clear each fanX_mode bit before setting them properly */
 337                 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
 338                 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
 339                 switch (val) {
 340                 case 0: /* full speed */
 341                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 342                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 343                         data->pwm[nr] = 255;
 344                         f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 345                                         data->pwm[nr]);
 346                         break;
 347                 case 1: /* PWM */
 348                         fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
 349                         fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
 350                         break;
 351                 case 2: /* AUTOMATIC*/
 352                         fanmode  |=  (1 << F75387_FAN_DUTY_MODE(nr));
 353                         break;
 354                 case 3: /* fan speed */
 355                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 356                         break;
 357                 }
 358         } else {
 359                 /* clear each fanX_mode bit before setting them properly */
 360                 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
 361                 switch (val) {
 362                 case 0: /* full speed */
 363                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 364                         data->pwm[nr] = 255;
 365                         f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 366                                         data->pwm[nr]);
 367                         break;
 368                 case 1: /* PWM */
 369                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 370                         break;
 371                 case 2: /* AUTOMATIC*/
 372                         fanmode  |= (2 << FAN_CTRL_MODE(nr));
 373                         break;
 374                 case 3: /* fan speed */
 375                         break;
 376                 }
 377         }
 378
 379         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
 380         data->pwm_enable[nr] = val;
 381         return 0;
 382 }
 383
 384 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
 385                 const char *buf, size_t count)
 386 {
 387         int nr = to_sensor_dev_attr(attr)->index;
 388         struct i2c_client *client = to_i2c_client(dev);
 389         struct f75375_data *data = i2c_get_clientdata(client);
 390         unsigned long val;
 391         int err;
 392
 393         err = kstrtoul(buf, 10, &val);
 394         if (err < 0)
 395                 return err;
 396
 397         mutex_lock(&data->update_lock);
 398         err = set_pwm_enable_direct(client, nr, val);
 399         mutex_unlock(&data->update_lock);
 400         return err ? err : count;
 401 }
 402
 403 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 404                 const char *buf, size_t count)
 405 {
 406         int nr = to_sensor_dev_attr(attr)->index;
 407         struct i2c_client *client = to_i2c_client(dev);
 408         struct f75375_data *data = i2c_get_clientdata(client);
 409         unsigned long val;
 410         int err;
 411         u8 conf;
 412         char reg, ctrl;
 413
 414         err = kstrtoul(buf, 10, &val);
 415         if (err < 0)
 416                 return err;
 417
 418         if (!(val == 0 || val == 1))
 419                 return -EINVAL;
 420
 421         /* F75373 does not support DC (linear voltage) fan control mode */
 422         if (data->kind == f75373 && val == 0)
 423                 return -EINVAL;
 424
 425         /* take care for different registers */
 426         if (data->kind == f75387) {
 427                 reg = F75375_REG_FAN_TIMER;
 428                 ctrl = F75387_FAN_CTRL_LINEAR(nr);
 429         } else {
 430                 reg = F75375_REG_CONFIG1;
 431                 ctrl = F75375_FAN_CTRL_LINEAR(nr);
 432         }
 433
 434         mutex_lock(&data->update_lock);
 435         conf = f75375_read8(client, reg);
 436         conf &= ~(1 << ctrl);
 437
 438         if (val == 0)
 439                 conf |= (1 << ctrl);
 440
 441         f75375_write8(client, reg, conf);
 442         data->pwm_mode[nr] = val;
 443         mutex_unlock(&data->update_lock);
 444         return count;
 445 }
 446
 447 static ssize_t show_pwm(struct device *dev, struct device_attribute
 448                 *attr, char *buf)
 449 {
 450         int nr = to_sensor_dev_attr(attr)->index;
 451         struct f75375_data *data = f75375_update_device(dev);
 452         return sprintf(buf, "%d\n", data->pwm[nr]);
 453 }
 454
 455 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
 456                 *attr, char *buf)
 457 {
 458         int nr = to_sensor_dev_attr(attr)->index;
 459         struct f75375_data *data = f75375_update_device(dev);
 460         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
 461 }
 462
 463 #define VOLT_FROM_REG(val) ((val) * 8)
 464 #define VOLT_TO_REG(val) ((val) / 8)
 465
 466 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 467                 char *buf)
 468 {
 469         int nr = to_sensor_dev_attr(attr)->index;
 470         struct f75375_data *data = f75375_update_device(dev);
 471         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
 472 }
 473
 474 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 475                 char *buf)
 476 {
 477         int nr = to_sensor_dev_attr(attr)->index;
 478         struct f75375_data *data = f75375_update_device(dev);
 479         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
 480 }
 481
 482 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 483                 char *buf)
 484 {
 485         int nr = to_sensor_dev_attr(attr)->index;
 486         struct f75375_data *data = f75375_update_device(dev);
 487         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
 488 }
 489
 490 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 491                 const char *buf, size_t count)
 492 {
 493         int nr = to_sensor_dev_attr(attr)->index;
 494         struct i2c_client *client = to_i2c_client(dev);
 495         struct f75375_data *data = i2c_get_clientdata(client);
 496         unsigned long val;
 497         int err;
 498
 499         err = kstrtoul(buf, 10, &val);
 500         if (err < 0)
 501                 return err;
 502
 503         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 504         mutex_lock(&data->update_lock);
 505         data->in_max[nr] = val;
 506         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
 507         mutex_unlock(&data->update_lock);
 508         return count;
 509 }
 510
 511 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 512                 const char *buf, size_t count)
 513 {
 514         int nr = to_sensor_dev_attr(attr)->index;
 515         struct i2c_client *client = to_i2c_client(dev);
 516         struct f75375_data *data = i2c_get_clientdata(client);
 517         unsigned long val;
 518         int err;
 519
 520         err = kstrtoul(buf, 10, &val);
 521         if (err < 0)
 522                 return err;
 523
 524         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 525         mutex_lock(&data->update_lock);
 526         data->in_min[nr] = val;
 527         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
 528         mutex_unlock(&data->update_lock);
 529         return count;
 530 }
 531 #define TEMP_FROM_REG(val) ((val) * 1000)
 532 #define TEMP_TO_REG(val) ((val) / 1000)
 533 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 534
 535 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
 536                 char *buf)
 537 {
 538         int nr = to_sensor_dev_attr(attr)->index;
 539         struct f75375_data *data = f75375_update_device(dev);
 540         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
 541 }
 542
 543 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 544                 char *buf)
 545 {
 546         int nr = to_sensor_dev_attr(attr)->index;
 547         struct f75375_data *data = f75375_update_device(dev);
 548         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 549 }
 550
 551 static ssize_t show_temp_max_hyst(struct device *dev,
 552                 struct device_attribute *attr, char *buf)
 553 {
 554         int nr = to_sensor_dev_attr(attr)->index;
 555         struct f75375_data *data = f75375_update_device(dev);
 556         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
 557 }
 558
 559 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 560                 const char *buf, size_t count)
 561 {
 562         int nr = to_sensor_dev_attr(attr)->index;
 563         struct i2c_client *client = to_i2c_client(dev);
 564         struct f75375_data *data = i2c_get_clientdata(client);
 565         unsigned long val;
 566         int err;
 567
 568         err = kstrtoul(buf, 10, &val);
 569         if (err < 0)
 570                 return err;
 571
 572         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 573         mutex_lock(&data->update_lock);
 574         data->temp_high[nr] = val;
 575         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 576         mutex_unlock(&data->update_lock);
 577         return count;
 578 }
 579
 580 static ssize_t set_temp_max_hyst(struct device *dev,
 581         struct device_attribute *attr, const char *buf, size_t count)
 582 {
 583         int nr = to_sensor_dev_attr(attr)->index;
 584         struct i2c_client *client = to_i2c_client(dev);
 585         struct f75375_data *data = i2c_get_clientdata(client);
 586         unsigned long val;
 587         int err;
 588
 589         err = kstrtoul(buf, 10, &val);
 590         if (err < 0)
 591                 return err;
 592
 593         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 594         mutex_lock(&data->update_lock);
 595         data->temp_max_hyst[nr] = val;
 596         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
 597                 data->temp_max_hyst[nr]);
 598         mutex_unlock(&data->update_lock);
 599         return count;
 600 }
 601
 602 #define show_fan(thing) \
 603 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
 604                         char *buf)\
 605 {\
 606         int nr = to_sensor_dev_attr(attr)->index;\
 607         struct f75375_data *data = f75375_update_device(dev); \
 608         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
 609 }
 610
 611 show_fan(fan);
 612 show_fan(fan_min);
 613 show_fan(fan_max);
 614 show_fan(fan_target);
 615
 616 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 617 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
 618         show_in_max, set_in_max, 0);
 619 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
 620         show_in_min, set_in_min, 0);
 621 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 622 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
 623         show_in_max, set_in_max, 1);
 624 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
 625         show_in_min, set_in_min, 1);
 626 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 627 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
 628         show_in_max, set_in_max, 2);
 629 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
 630         show_in_min, set_in_min, 2);
 631 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 632 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
 633         show_in_max, set_in_max, 3);
 634 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
 635         show_in_min, set_in_min, 3);
 636 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
 637 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
 638         show_temp_max_hyst, set_temp_max_hyst, 0);
 639 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
 640         show_temp_max, set_temp_max, 0);
 641 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
 642 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
 643         show_temp_max_hyst, set_temp_max_hyst, 1);
 644 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
 645         show_temp_max, set_temp_max, 1);
 646 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 647 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
 648 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
 649         show_fan_min, set_fan_min, 0);
 650 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
 651         show_fan_target, set_fan_target, 0);
 652 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 653 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
 654 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
 655         show_fan_min, set_fan_min, 1);
 656 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
 657         show_fan_target, set_fan_target, 1);
 658 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
 659         show_pwm, set_pwm, 0);
 660 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
 661         show_pwm_enable, set_pwm_enable, 0);
 662 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
 663         show_pwm_mode, set_pwm_mode, 0);
 664 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
 665         show_pwm, set_pwm, 1);
 666 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
 667         show_pwm_enable, set_pwm_enable, 1);
 668 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
 669         show_pwm_mode, set_pwm_mode, 1);
 670
 671 static struct attribute *f75375_attributes[] = {
 672         &sensor_dev_attr_temp1_input.dev_attr.attr,
 673         &sensor_dev_attr_temp1_max.dev_attr.attr,
 674         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 675         &sensor_dev_attr_temp2_input.dev_attr.attr,
 676         &sensor_dev_attr_temp2_max.dev_attr.attr,
 677         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 678         &sensor_dev_attr_fan1_input.dev_attr.attr,
 679         &sensor_dev_attr_fan1_max.dev_attr.attr,
 680         &sensor_dev_attr_fan1_min.dev_attr.attr,
 681         &sensor_dev_attr_fan1_target.dev_attr.attr,
 682         &sensor_dev_attr_fan2_input.dev_attr.attr,
 683         &sensor_dev_attr_fan2_max.dev_attr.attr,
 684         &sensor_dev_attr_fan2_min.dev_attr.attr,
 685         &sensor_dev_attr_fan2_target.dev_attr.attr,
 686         &sensor_dev_attr_pwm1.dev_attr.attr,
 687         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 688         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 689         &sensor_dev_attr_pwm2.dev_attr.attr,
 690         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 691         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 692         &sensor_dev_attr_in0_input.dev_attr.attr,
 693         &sensor_dev_attr_in0_max.dev_attr.attr,
 694         &sensor_dev_attr_in0_min.dev_attr.attr,
 695         &sensor_dev_attr_in1_input.dev_attr.attr,
 696         &sensor_dev_attr_in1_max.dev_attr.attr,
 697         &sensor_dev_attr_in1_min.dev_attr.attr,
 698         &sensor_dev_attr_in2_input.dev_attr.attr,
 699         &sensor_dev_attr_in2_max.dev_attr.attr,
 700         &sensor_dev_attr_in2_min.dev_attr.attr,
 701         &sensor_dev_attr_in3_input.dev_attr.attr,
 702         &sensor_dev_attr_in3_max.dev_attr.attr,
 703         &sensor_dev_attr_in3_min.dev_attr.attr,
 704         NULL
 705 };
 706
 707 static const struct attribute_group f75375_group = {
 708         .attrs = f75375_attributes,
 709 };
 710
 711 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
 712                 struct f75375s_platform_data *f75375s_pdata)
 713 {
 714         int nr;
 715
 716         if (!f75375s_pdata) {
 717                 u8 conf, mode;
 718                 int nr;
 719
 720                 conf = f75375_read8(client, F75375_REG_CONFIG1);
 721                 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
 722                 for (nr = 0; nr < 2; nr++) {
 723                         if (data->kind == f75387) {
 724                                 bool manu, duty;
 725
 726                                 if (!(conf & (1 << F75387_FAN_CTRL_LINEAR(nr))))
 727                                         data->pwm_mode[nr] = 1;
 728
 729                                 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
 730                                 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
 731                                 if (manu && duty)
 732                                         /* speed */
 733                                         data->pwm_enable[nr] = 3;
 734                                 else if (!manu && duty)
 735                                         /* automatic */
 736                                         data->pwm_enable[nr] = 2;
 737                                 else
 738                                         /* manual */
 739                                         data->pwm_enable[nr] = 1;
 740                         } else {
 741                                 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
 742                                         data->pwm_mode[nr] = 1;
 743
 744                                 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
 745                                 case 0:         /* speed */
 746                                         data->pwm_enable[nr] = 3;
 747                                         break;
 748                                 case 1:         /* automatic */
 749                                         data->pwm_enable[nr] = 2;
 750                                         break;
 751                                 default:        /* manual */
 752                                         data->pwm_enable[nr] = 1;
 753                                         break;
 754                                 }
 755                         }
 756                 }
 757                 return;
 758         }
 759
 760         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
 761         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
 762         for (nr = 0; nr < 2; nr++) {
 763                 data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
 764                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 765                         data->pwm[nr]);
 766         }
 767
 768 }
 769
 770 static int f75375_probe(struct i2c_client *client,
 771                 const struct i2c_device_id *id)
 772 {
 773         struct f75375_data *data;
 774         struct f75375s_platform_data *f75375s_pdata = client->dev.platform_data;
 775         int err;
 776
 777         if (!i2c_check_functionality(client->adapter,
 778                                 I2C_FUNC_SMBUS_BYTE_DATA))
 779                 return -EIO;
 780         data = kzalloc(sizeof(struct f75375_data), GFP_KERNEL);
 781         if (!data)
 782                 return -ENOMEM;
 783
 784         i2c_set_clientdata(client, data);
 785         mutex_init(&data->update_lock);
 786         data->kind = id->driver_data;
 787
 788         err = sysfs_create_group(&client->dev.kobj, &f75375_group);
 789         if (err)
 790                 goto exit_free;
 791
 792         if (data->kind == f75375) {
 793                 err = sysfs_chmod_file(&client->dev.kobj,
 794                         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 795                         S_IRUGO | S_IWUSR);
 796                 if (err)
 797                         goto exit_remove;
 798                 err = sysfs_chmod_file(&client->dev.kobj,
 799                         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 800                         S_IRUGO | S_IWUSR);
 801                 if (err)
 802                         goto exit_remove;
 803         }
 804
 805         data->hwmon_dev = hwmon_device_register(&client->dev);
 806         if (IS_ERR(data->hwmon_dev)) {
 807                 err = PTR_ERR(data->hwmon_dev);
 808                 goto exit_remove;
 809         }
 810
 811         f75375_init(client, data, f75375s_pdata);
 812
 813         return 0;
 814
 815 exit_remove:
 816         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 817 exit_free:
 818         kfree(data);
 819         return err;
 820 }
 821
 822 static int f75375_remove(struct i2c_client *client)
 823 {
 824         struct f75375_data *data = i2c_get_clientdata(client);
 825         hwmon_device_unregister(data->hwmon_dev);
 826         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 827         kfree(data);
 828         return 0;
 829 }
 830
 831 /* Return 0 if detection is successful, -ENODEV otherwise */
 832 static int f75375_detect(struct i2c_client *client,
 833                          struct i2c_board_info *info)
 834 {
 835         struct i2c_adapter *adapter = client->adapter;
 836         u16 vendid, chipid;
 837         u8 version;
 838         const char *name;
 839
 840         vendid = f75375_read16(client, F75375_REG_VENDOR);
 841         chipid = f75375_read16(client, F75375_CHIP_ID);
 842         if (vendid != 0x1934)
 843                 return -ENODEV;
 844
 845         if (chipid == 0x0306)
 846                 name = "f75375";
 847         else if (chipid == 0x0204)
 848                 name = "f75373";
 849         else if (chipid == 0x0410)
 850                 name = "f75387";
 851         else
 852                 return -ENODEV;
 853
 854         version = f75375_read8(client, F75375_REG_VERSION);
 855         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
 856         strlcpy(info->type, name, I2C_NAME_SIZE);
 857
 858         return 0;
 859 }
 860
 861 static int __init sensors_f75375_init(void)
 862 {
 863         return i2c_add_driver(&f75375_driver);
 864 }
 865
 866 static void __exit sensors_f75375_exit(void)
 867 {
 868         i2c_del_driver(&f75375_driver);
 869 }
 870
 871 MODULE_AUTHOR("Riku Voipio");
 872 MODULE_LICENSE("GPL");
 873 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");
 874
 875 module_init(sensors_f75375_init);
 876 module_exit(sensors_f75375_exit);