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                 }
 204                 for (nr = 0; nr < 4; nr++) {
 205                         data->in_max[nr] =
 206                                 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
 207                         data->in_min[nr] =
 208                                 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
 209                 }
 210                 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
 211                 data->last_limits = jiffies;
 212         }
 213
 214         /* Measurement registers cache is refreshed after 2 second */
 215         if (time_after(jiffies, data->last_updated + 2 * HZ)
 216                 || !data->valid) {
 217                 for (nr = 0; nr < 2; nr++) {
 218                         data->pwm[nr] = f75375_read8(client,
 219                                 F75375_REG_FAN_PWM_DUTY(nr));
 220                         /* assign MSB, therefore shift it by 8 bits */
 221                         data->temp11[nr] =
 222                                 f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
 223                         if (data->kind == f75387)
 224                                 /* merge F75387's temperature LSB (11-bit) */
 225                                 data->temp11[nr] |=
 226                                         f75375_read8(client,
 227                                                      F75387_REG_TEMP11_LSB(nr));
 228                         data->fan[nr] =
 229                                 f75375_read16(client, F75375_REG_FAN(nr));
 230                 }
 231                 for (nr = 0; nr < 4; nr++)
 232                         data->in[nr] =
 233                                 f75375_read8(client, F75375_REG_VOLT(nr));
 234
 235                 data->last_updated = jiffies;
 236                 data->valid = 1;
 237         }
 238
 239         mutex_unlock(&data->update_lock);
 240         return data;
 241 }
 242
 243 static inline u16 rpm_from_reg(u16 reg)
 244 {
 245         if (reg == 0 || reg == 0xffff)
 246                 return 0;
 247         return 1500000 / reg;
 248 }
 249
 250 static inline u16 rpm_to_reg(int rpm)
 251 {
 252         if (rpm < 367 || rpm > 0xffff)
 253                 return 0xffff;
 254         return 1500000 / rpm;
 255 }
 256
 257 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 258                 const char *buf, size_t count)
 259 {
 260         int nr = to_sensor_dev_attr(attr)->index;
 261         struct i2c_client *client = to_i2c_client(dev);
 262         struct f75375_data *data = i2c_get_clientdata(client);
 263         unsigned long val;
 264         int err;
 265
 266         err = kstrtoul(buf, 10, &val);
 267         if (err < 0)
 268                 return err;
 269
 270         mutex_lock(&data->update_lock);
 271         data->fan_min[nr] = rpm_to_reg(val);
 272         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
 273         mutex_unlock(&data->update_lock);
 274         return count;
 275 }
 276
 277 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
 278                 const char *buf, size_t count)
 279 {
 280         int nr = to_sensor_dev_attr(attr)->index;
 281         struct i2c_client *client = to_i2c_client(dev);
 282         struct f75375_data *data = i2c_get_clientdata(client);
 283         unsigned long val;
 284         int err;
 285
 286         err = kstrtoul(buf, 10, &val);
 287         if (err < 0)
 288                 return err;
 289
 290         mutex_lock(&data->update_lock);
 291         data->fan_target[nr] = rpm_to_reg(val);
 292         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
 293         mutex_unlock(&data->update_lock);
 294         return count;
 295 }
 296
 297 static ssize_t set_pwm(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 f75375_data *data = i2c_get_clientdata(client);
 303         unsigned long val;
 304         int err;
 305
 306         err = kstrtoul(buf, 10, &val);
 307         if (err < 0)
 308                 return err;
 309
 310         mutex_lock(&data->update_lock);
 311         data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
 312         f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr), data->pwm[nr]);
 313         mutex_unlock(&data->update_lock);
 314         return count;
 315 }
 316
 317 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 318                 *attr, char *buf)
 319 {
 320         int nr = to_sensor_dev_attr(attr)->index;
 321         struct f75375_data *data = f75375_update_device(dev);
 322         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
 323 }
 324
 325 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
 326 {
 327         struct f75375_data *data = i2c_get_clientdata(client);
 328         u8 fanmode;
 329
 330         if (val < 0 || val > 3)
 331                 return -EINVAL;
 332
 333         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
 334         if (data->kind == f75387) {
 335                 /* clear each fanX_mode bit before setting them properly */
 336                 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
 337                 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
 338                 switch (val) {
 339                 case 0: /* full speed */
 340                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 341                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 342                         data->pwm[nr] = 255;
 343                         break;
 344                 case 1: /* PWM */
 345                         fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
 346                         fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
 347                         break;
 348                 case 2: /* AUTOMATIC*/
 349                         fanmode  |=  (1 << F75387_FAN_DUTY_MODE(nr));
 350                         break;
 351                 case 3: /* fan speed */
 352                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 353                         break;
 354                 }
 355         } else {
 356                 /* clear each fanX_mode bit before setting them properly */
 357                 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
 358                 switch (val) {
 359                 case 0: /* full speed */
 360                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 361                         data->pwm[nr] = 255;
 362                         break;
 363                 case 1: /* PWM */
 364                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 365                         break;
 366                 case 2: /* AUTOMATIC*/
 367                         fanmode  |= (1 << FAN_CTRL_MODE(nr));
 368                         break;
 369                 case 3: /* fan speed */
 370                         break;
 371                 }
 372         }
 373
 374         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
 375         data->pwm_enable[nr] = val;
 376         if (val == 0)
 377                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 378                                 data->pwm[nr]);
 379         return 0;
 380 }
 381
 382 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
 383                 const char *buf, size_t count)
 384 {
 385         int nr = to_sensor_dev_attr(attr)->index;
 386         struct i2c_client *client = to_i2c_client(dev);
 387         struct f75375_data *data = i2c_get_clientdata(client);
 388         unsigned long val;
 389         int err;
 390
 391         err = kstrtoul(buf, 10, &val);
 392         if (err < 0)
 393                 return err;
 394
 395         mutex_lock(&data->update_lock);
 396         err = set_pwm_enable_direct(client, nr, val);
 397         mutex_unlock(&data->update_lock);
 398         return err ? err : count;
 399 }
 400
 401 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 402                 const char *buf, size_t count)
 403 {
 404         int nr = to_sensor_dev_attr(attr)->index;
 405         struct i2c_client *client = to_i2c_client(dev);
 406         struct f75375_data *data = i2c_get_clientdata(client);
 407         unsigned long val;
 408         int err;
 409         u8 conf;
 410         char reg, ctrl;
 411
 412         err = kstrtoul(buf, 10, &val);
 413         if (err < 0)
 414                 return err;
 415
 416         if (!(val == 0 || val == 1))
 417                 return -EINVAL;
 418
 419         /* F75373 does not support DC (linear voltage) fan control mode */
 420         if (data->kind == f75373 && val == 0)
 421                 return -EINVAL;
 422
 423         /* take care for different registers */
 424         if (data->kind == f75387) {
 425                 reg = F75375_REG_FAN_TIMER;
 426                 ctrl = F75387_FAN_CTRL_LINEAR(nr);
 427         } else {
 428                 reg = F75375_REG_CONFIG1;
 429                 ctrl = F75375_FAN_CTRL_LINEAR(nr);
 430         }
 431
 432         mutex_lock(&data->update_lock);
 433         conf = f75375_read8(client, reg);
 434         conf &= ~(1 << ctrl);
 435
 436         if (val == 0)
 437                 conf |= (1 << ctrl);
 438
 439         f75375_write8(client, reg, conf);
 440         data->pwm_mode[nr] = val;
 441         mutex_unlock(&data->update_lock);
 442         return count;
 443 }
 444
 445 static ssize_t show_pwm(struct device *dev, struct device_attribute
 446                 *attr, char *buf)
 447 {
 448         int nr = to_sensor_dev_attr(attr)->index;
 449         struct f75375_data *data = f75375_update_device(dev);
 450         return sprintf(buf, "%d\n", data->pwm[nr]);
 451 }
 452
 453 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
 454                 *attr, char *buf)
 455 {
 456         int nr = to_sensor_dev_attr(attr)->index;
 457         struct f75375_data *data = f75375_update_device(dev);
 458         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
 459 }
 460
 461 #define VOLT_FROM_REG(val) ((val) * 8)
 462 #define VOLT_TO_REG(val) ((val) / 8)
 463
 464 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 465                 char *buf)
 466 {
 467         int nr = to_sensor_dev_attr(attr)->index;
 468         struct f75375_data *data = f75375_update_device(dev);
 469         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
 470 }
 471
 472 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 473                 char *buf)
 474 {
 475         int nr = to_sensor_dev_attr(attr)->index;
 476         struct f75375_data *data = f75375_update_device(dev);
 477         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
 478 }
 479
 480 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 481                 char *buf)
 482 {
 483         int nr = to_sensor_dev_attr(attr)->index;
 484         struct f75375_data *data = f75375_update_device(dev);
 485         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
 486 }
 487
 488 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 489                 const char *buf, size_t count)
 490 {
 491         int nr = to_sensor_dev_attr(attr)->index;
 492         struct i2c_client *client = to_i2c_client(dev);
 493         struct f75375_data *data = i2c_get_clientdata(client);
 494         unsigned long val;
 495         int err;
 496
 497         err = kstrtoul(buf, 10, &val);
 498         if (err < 0)
 499                 return err;
 500
 501         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 502         mutex_lock(&data->update_lock);
 503         data->in_max[nr] = val;
 504         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
 505         mutex_unlock(&data->update_lock);
 506         return count;
 507 }
 508
 509 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 510                 const char *buf, size_t count)
 511 {
 512         int nr = to_sensor_dev_attr(attr)->index;
 513         struct i2c_client *client = to_i2c_client(dev);
 514         struct f75375_data *data = i2c_get_clientdata(client);
 515         unsigned long val;
 516         int err;
 517
 518         err = kstrtoul(buf, 10, &val);
 519         if (err < 0)
 520                 return err;
 521
 522         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 523         mutex_lock(&data->update_lock);
 524         data->in_min[nr] = val;
 525         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
 526         mutex_unlock(&data->update_lock);
 527         return count;
 528 }
 529 #define TEMP_FROM_REG(val) ((val) * 1000)
 530 #define TEMP_TO_REG(val) ((val) / 1000)
 531 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 532
 533 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
 534                 char *buf)
 535 {
 536         int nr = to_sensor_dev_attr(attr)->index;
 537         struct f75375_data *data = f75375_update_device(dev);
 538         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
 539 }
 540
 541 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 542                 char *buf)
 543 {
 544         int nr = to_sensor_dev_attr(attr)->index;
 545         struct f75375_data *data = f75375_update_device(dev);
 546         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 547 }
 548
 549 static ssize_t show_temp_max_hyst(struct device *dev,
 550                 struct device_attribute *attr, char *buf)
 551 {
 552         int nr = to_sensor_dev_attr(attr)->index;
 553         struct f75375_data *data = f75375_update_device(dev);
 554         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
 555 }
 556
 557 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 558                 const char *buf, size_t count)
 559 {
 560         int nr = to_sensor_dev_attr(attr)->index;
 561         struct i2c_client *client = to_i2c_client(dev);
 562         struct f75375_data *data = i2c_get_clientdata(client);
 563         unsigned long val;
 564         int err;
 565
 566         err = kstrtoul(buf, 10, &val);
 567         if (err < 0)
 568                 return err;
 569
 570         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 571         mutex_lock(&data->update_lock);
 572         data->temp_high[nr] = val;
 573         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 574         mutex_unlock(&data->update_lock);
 575         return count;
 576 }
 577
 578 static ssize_t set_temp_max_hyst(struct device *dev,
 579         struct device_attribute *attr, const char *buf, size_t count)
 580 {
 581         int nr = to_sensor_dev_attr(attr)->index;
 582         struct i2c_client *client = to_i2c_client(dev);
 583         struct f75375_data *data = i2c_get_clientdata(client);
 584         unsigned long val;
 585         int err;
 586
 587         err = kstrtoul(buf, 10, &val);
 588         if (err < 0)
 589                 return err;
 590
 591         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 592         mutex_lock(&data->update_lock);
 593         data->temp_max_hyst[nr] = val;
 594         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
 595                 data->temp_max_hyst[nr]);
 596         mutex_unlock(&data->update_lock);
 597         return count;
 598 }
 599
 600 #define show_fan(thing) \
 601 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
 602                         char *buf)\
 603 {\
 604         int nr = to_sensor_dev_attr(attr)->index;\
 605         struct f75375_data *data = f75375_update_device(dev); \
 606         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
 607 }
 608
 609 show_fan(fan);
 610 show_fan(fan_min);
 611 show_fan(fan_max);
 612 show_fan(fan_target);
 613
 614 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 615 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
 616         show_in_max, set_in_max, 0);
 617 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
 618         show_in_min, set_in_min, 0);
 619 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 620 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
 621         show_in_max, set_in_max, 1);
 622 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
 623         show_in_min, set_in_min, 1);
 624 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 625 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
 626         show_in_max, set_in_max, 2);
 627 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
 628         show_in_min, set_in_min, 2);
 629 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 630 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
 631         show_in_max, set_in_max, 3);
 632 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
 633         show_in_min, set_in_min, 3);
 634 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
 635 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
 636         show_temp_max_hyst, set_temp_max_hyst, 0);
 637 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
 638         show_temp_max, set_temp_max, 0);
 639 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
 640 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
 641         show_temp_max_hyst, set_temp_max_hyst, 1);
 642 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
 643         show_temp_max, set_temp_max, 1);
 644 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 645 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
 646 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
 647         show_fan_min, set_fan_min, 0);
 648 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
 649         show_fan_target, set_fan_target, 0);
 650 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 651 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
 652 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
 653         show_fan_min, set_fan_min, 1);
 654 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
 655         show_fan_target, set_fan_target, 1);
 656 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
 657         show_pwm, set_pwm, 0);
 658 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
 659         show_pwm_enable, set_pwm_enable, 0);
 660 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
 661         show_pwm_mode, set_pwm_mode, 0);
 662 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
 663         show_pwm, set_pwm, 1);
 664 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
 665         show_pwm_enable, set_pwm_enable, 1);
 666 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
 667         show_pwm_mode, set_pwm_mode, 1);
 668
 669 static struct attribute *f75375_attributes[] = {
 670         &sensor_dev_attr_temp1_input.dev_attr.attr,
 671         &sensor_dev_attr_temp1_max.dev_attr.attr,
 672         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 673         &sensor_dev_attr_temp2_input.dev_attr.attr,
 674         &sensor_dev_attr_temp2_max.dev_attr.attr,
 675         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 676         &sensor_dev_attr_fan1_input.dev_attr.attr,
 677         &sensor_dev_attr_fan1_max.dev_attr.attr,
 678         &sensor_dev_attr_fan1_min.dev_attr.attr,
 679         &sensor_dev_attr_fan1_target.dev_attr.attr,
 680         &sensor_dev_attr_fan2_input.dev_attr.attr,
 681         &sensor_dev_attr_fan2_max.dev_attr.attr,
 682         &sensor_dev_attr_fan2_min.dev_attr.attr,
 683         &sensor_dev_attr_fan2_target.dev_attr.attr,
 684         &sensor_dev_attr_pwm1.dev_attr.attr,
 685         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 686         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 687         &sensor_dev_attr_pwm2.dev_attr.attr,
 688         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 689         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 690         &sensor_dev_attr_in0_input.dev_attr.attr,
 691         &sensor_dev_attr_in0_max.dev_attr.attr,
 692         &sensor_dev_attr_in0_min.dev_attr.attr,
 693         &sensor_dev_attr_in1_input.dev_attr.attr,
 694         &sensor_dev_attr_in1_max.dev_attr.attr,
 695         &sensor_dev_attr_in1_min.dev_attr.attr,
 696         &sensor_dev_attr_in2_input.dev_attr.attr,
 697         &sensor_dev_attr_in2_max.dev_attr.attr,
 698         &sensor_dev_attr_in2_min.dev_attr.attr,
 699         &sensor_dev_attr_in3_input.dev_attr.attr,
 700         &sensor_dev_attr_in3_max.dev_attr.attr,
 701         &sensor_dev_attr_in3_min.dev_attr.attr,
 702         NULL
 703 };
 704
 705 static const struct attribute_group f75375_group = {
 706         .attrs = f75375_attributes,
 707 };
 708
 709 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
 710                 struct f75375s_platform_data *f75375s_pdata)
 711 {
 712         int nr;
 713
 714         if (!f75375s_pdata) {
 715                 u8 conf, mode;
 716                 int nr;
 717
 718                 conf = f75375_read8(client, F75375_REG_CONFIG1);
 719                 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
 720                 for (nr = 0; nr < 2; nr++) {
 721                         if (data->kind == f75387) {
 722                                 bool manu, duty;
 723
 724                                 if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
 725                                         data->pwm_mode[nr] = 1;
 726
 727                                 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
 728                                 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
 729                                 if (manu && duty)
 730                                         /* speed */
 731                                         data->pwm_enable[nr] = 3;
 732                                 else if (!manu && duty)
 733                                         /* automatic */
 734                                         data->pwm_enable[nr] = 2;
 735                                 else
 736                                         /* manual */
 737                                         data->pwm_enable[nr] = 1;
 738                         } else {
 739                                 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
 740                                         data->pwm_mode[nr] = 1;
 741
 742                                 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
 743                                 case 0:         /* speed */
 744                                         data->pwm_enable[nr] = 3;
 745                                         break;
 746                                 case 1:         /* automatic */
 747                                         data->pwm_enable[nr] = 2;
 748                                         break;
 749                                 default:        /* manual */
 750                                         data->pwm_enable[nr] = 1;
 751                                         break;
 752                                 }
 753                         }
 754                 }
 755                 return;
 756         }
 757
 758         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
 759         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
 760         for (nr = 0; nr < 2; nr++) {
 761                 data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
 762                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 763                         data->pwm[nr]);
 764         }
 765
 766 }
 767
 768 static int f75375_probe(struct i2c_client *client,
 769                 const struct i2c_device_id *id)
 770 {
 771         struct f75375_data *data;
 772         struct f75375s_platform_data *f75375s_pdata = client->dev.platform_data;
 773         int err;
 774
 775         if (!i2c_check_functionality(client->adapter,
 776                                 I2C_FUNC_SMBUS_BYTE_DATA))
 777                 return -EIO;
 778         data = kzalloc(sizeof(struct f75375_data), GFP_KERNEL);
 779         if (!data)
 780                 return -ENOMEM;
 781
 782         i2c_set_clientdata(client, data);
 783         mutex_init(&data->update_lock);
 784         data->kind = id->driver_data;
 785
 786         err = sysfs_create_group(&client->dev.kobj, &f75375_group);
 787         if (err)
 788                 goto exit_free;
 789
 790         if (data->kind == f75375) {
 791                 err = sysfs_chmod_file(&client->dev.kobj,
 792                         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 793                         S_IRUGO | S_IWUSR);
 794                 if (err)
 795                         goto exit_remove;
 796                 err = sysfs_chmod_file(&client->dev.kobj,
 797                         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 798                         S_IRUGO | S_IWUSR);
 799                 if (err)
 800                         goto exit_remove;
 801         }
 802
 803         data->hwmon_dev = hwmon_device_register(&client->dev);
 804         if (IS_ERR(data->hwmon_dev)) {
 805                 err = PTR_ERR(data->hwmon_dev);
 806                 goto exit_remove;
 807         }
 808
 809         f75375_init(client, data, f75375s_pdata);
 810
 811         return 0;
 812
 813 exit_remove:
 814         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 815 exit_free:
 816         kfree(data);
 817         return err;
 818 }
 819
 820 static int f75375_remove(struct i2c_client *client)
 821 {
 822         struct f75375_data *data = i2c_get_clientdata(client);
 823         hwmon_device_unregister(data->hwmon_dev);
 824         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 825         kfree(data);
 826         return 0;
 827 }
 828
 829 /* Return 0 if detection is successful, -ENODEV otherwise */
 830 static int f75375_detect(struct i2c_client *client,
 831                          struct i2c_board_info *info)
 832 {
 833         struct i2c_adapter *adapter = client->adapter;
 834         u16 vendid, chipid;
 835         u8 version;
 836         const char *name;
 837
 838         vendid = f75375_read16(client, F75375_REG_VENDOR);
 839         chipid = f75375_read16(client, F75375_CHIP_ID);
 840         if (vendid != 0x1934)
 841                 return -ENODEV;
 842
 843         if (chipid == 0x0306)
 844                 name = "f75375";
 845         else if (chipid == 0x0204)
 846                 name = "f75373";
 847         else if (chipid == 0x0410)
 848                 name = "f75387";
 849         else
 850                 return -ENODEV;
 851
 852         version = f75375_read8(client, F75375_REG_VERSION);
 853         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
 854         strlcpy(info->type, name, I2C_NAME_SIZE);
 855
 856         return 0;
 857 }
 858
 859 static int __init sensors_f75375_init(void)
 860 {
 861         return i2c_add_driver(&f75375_driver);
 862 }
 863
 864 static void __exit sensors_f75375_exit(void)
 865 {
 866         i2c_del_driver(&f75375_driver);
 867 }
 868
 869 MODULE_AUTHOR("Riku Voipio");
 870 MODULE_LICENSE("GPL");
 871 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");
 872
 873 module_init(sensors_f75375_init);
 874 module_exit(sensors_f75375_exit);