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 void f75375_write_pwm(struct i2c_client *client, int nr)
 182 {
 183         struct f75375_data *data = i2c_get_clientdata(client);
 184         if (data->kind == f75387)
 185                 f75375_write16(client, F75375_REG_FAN_EXP(nr), data->pwm[nr]);
 186         else
 187                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 188                               data->pwm[nr]);
 189 }
 190
 191 static struct f75375_data *f75375_update_device(struct device *dev)
 192 {
 193         struct i2c_client *client = to_i2c_client(dev);
 194         struct f75375_data *data = i2c_get_clientdata(client);
 195         int nr;
 196
 197         mutex_lock(&data->update_lock);
 198
 199         /* Limit registers cache is refreshed after 60 seconds */
 200         if (time_after(jiffies, data->last_limits + 60 * HZ)
 201                 || !data->valid) {
 202                 for (nr = 0; nr < 2; nr++) {
 203                         data->temp_high[nr] =
 204                                 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
 205                         data->temp_max_hyst[nr] =
 206                                 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
 207                         data->fan_max[nr] =
 208                                 f75375_read16(client, F75375_REG_FAN_FULL(nr));
 209                         data->fan_min[nr] =
 210                                 f75375_read16(client, F75375_REG_FAN_MIN(nr));
 211                         data->fan_target[nr] =
 212                                 f75375_read16(client, F75375_REG_FAN_EXP(nr));
 213                 }
 214                 for (nr = 0; nr < 4; nr++) {
 215                         data->in_max[nr] =
 216                                 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
 217                         data->in_min[nr] =
 218                                 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
 219                 }
 220                 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
 221                 data->last_limits = jiffies;
 222         }
 223
 224         /* Measurement registers cache is refreshed after 2 second */
 225         if (time_after(jiffies, data->last_updated + 2 * HZ)
 226                 || !data->valid) {
 227                 for (nr = 0; nr < 2; nr++) {
 228                         data->pwm[nr] = f75375_read8(client,
 229                                 F75375_REG_FAN_PWM_DUTY(nr));
 230                         /* assign MSB, therefore shift it by 8 bits */
 231                         data->temp11[nr] =
 232                                 f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
 233                         if (data->kind == f75387)
 234                                 /* merge F75387's temperature LSB (11-bit) */
 235                                 data->temp11[nr] |=
 236                                         f75375_read8(client,
 237                                                      F75387_REG_TEMP11_LSB(nr));
 238                         data->fan[nr] =
 239                                 f75375_read16(client, F75375_REG_FAN(nr));
 240                 }
 241                 for (nr = 0; nr < 4; nr++)
 242                         data->in[nr] =
 243                                 f75375_read8(client, F75375_REG_VOLT(nr));
 244
 245                 data->last_updated = jiffies;
 246                 data->valid = 1;
 247         }
 248
 249         mutex_unlock(&data->update_lock);
 250         return data;
 251 }
 252
 253 static inline u16 rpm_from_reg(u16 reg)
 254 {
 255         if (reg == 0 || reg == 0xffff)
 256                 return 0;
 257         return 1500000 / reg;
 258 }
 259
 260 static inline u16 rpm_to_reg(int rpm)
 261 {
 262         if (rpm < 367 || rpm > 0xffff)
 263                 return 0xffff;
 264         return 1500000 / rpm;
 265 }
 266
 267 static bool duty_mode_enabled(u8 pwm_enable)
 268 {
 269         switch (pwm_enable) {
 270         case 0: /* Manual, duty mode (full speed) */
 271         case 1: /* Manual, duty mode */
 272         case 4: /* Auto, duty mode */
 273                 return true;
 274         case 2: /* Auto, speed mode */
 275         case 3: /* Manual, speed mode */
 276                 return false;
 277         default:
 278                 BUG();
 279         }
 280 }
 281
 282 static bool auto_mode_enabled(u8 pwm_enable)
 283 {
 284         switch (pwm_enable) {
 285         case 0: /* Manual, duty mode (full speed) */
 286         case 1: /* Manual, duty mode */
 287         case 3: /* Manual, speed mode */
 288                 return false;
 289         case 2: /* Auto, speed mode */
 290         case 4: /* Auto, duty mode */
 291                 return true;
 292         default:
 293                 BUG();
 294         }
 295 }
 296
 297 static ssize_t set_fan_min(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->fan_min[nr] = rpm_to_reg(val);
 312         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
 313         mutex_unlock(&data->update_lock);
 314         return count;
 315 }
 316
 317 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
 318                 const char *buf, size_t count)
 319 {
 320         int nr = to_sensor_dev_attr(attr)->index;
 321         struct i2c_client *client = to_i2c_client(dev);
 322         struct f75375_data *data = i2c_get_clientdata(client);
 323         unsigned long val;
 324         int err;
 325
 326         err = kstrtoul(buf, 10, &val);
 327         if (err < 0)
 328                 return err;
 329
 330         if (auto_mode_enabled(data->pwm_enable[nr]))
 331                 return -EINVAL;
 332         if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
 333                 return -EINVAL;
 334
 335         mutex_lock(&data->update_lock);
 336         data->fan_target[nr] = rpm_to_reg(val);
 337         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
 338         mutex_unlock(&data->update_lock);
 339         return count;
 340 }
 341
 342 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 343                 const char *buf, size_t count)
 344 {
 345         int nr = to_sensor_dev_attr(attr)->index;
 346         struct i2c_client *client = to_i2c_client(dev);
 347         struct f75375_data *data = i2c_get_clientdata(client);
 348         unsigned long val;
 349         int err;
 350
 351         err = kstrtoul(buf, 10, &val);
 352         if (err < 0)
 353                 return err;
 354
 355         if (auto_mode_enabled(data->pwm_enable[nr]) ||
 356             !duty_mode_enabled(data->pwm_enable[nr]))
 357                 return -EINVAL;
 358
 359         mutex_lock(&data->update_lock);
 360         data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
 361         f75375_write_pwm(client, nr);
 362         mutex_unlock(&data->update_lock);
 363         return count;
 364 }
 365
 366 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 367                 *attr, char *buf)
 368 {
 369         int nr = to_sensor_dev_attr(attr)->index;
 370         struct f75375_data *data = f75375_update_device(dev);
 371         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
 372 }
 373
 374 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
 375 {
 376         struct f75375_data *data = i2c_get_clientdata(client);
 377         u8 fanmode;
 378
 379         if (val < 0 || val > 4)
 380                 return -EINVAL;
 381
 382         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
 383         if (data->kind == f75387) {
 384                 /* For now, deny dangerous toggling of duty mode */
 385                 if (duty_mode_enabled(data->pwm_enable[nr]) !=
 386                                 duty_mode_enabled(val))
 387                         return -EOPNOTSUPP;
 388                 /* clear each fanX_mode bit before setting them properly */
 389                 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
 390                 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
 391                 switch (val) {
 392                 case 0: /* full speed */
 393                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 394                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 395                         data->pwm[nr] = 255;
 396                         break;
 397                 case 1: /* PWM */
 398                         fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
 399                         fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
 400                         break;
 401                 case 2: /* Automatic, speed mode */
 402                         break;
 403                 case 3: /* fan speed */
 404                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 405                         break;
 406                 case 4: /* Automatic, pwm */
 407                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 408                         break;
 409                 }
 410         } else {
 411                 /* clear each fanX_mode bit before setting them properly */
 412                 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
 413                 switch (val) {
 414                 case 0: /* full speed */
 415                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 416                         data->pwm[nr] = 255;
 417                         break;
 418                 case 1: /* PWM */
 419                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 420                         break;
 421                 case 2: /* AUTOMATIC*/
 422                         fanmode  |= (1 << FAN_CTRL_MODE(nr));
 423                         break;
 424                 case 3: /* fan speed */
 425                         break;
 426                 case 4: /* Automatic pwm */
 427                         return -EINVAL;
 428                 }
 429         }
 430
 431         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
 432         data->pwm_enable[nr] = val;
 433         if (val == 0)
 434                 f75375_write_pwm(client, nr);
 435         return 0;
 436 }
 437
 438 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
 439                 const char *buf, size_t count)
 440 {
 441         int nr = to_sensor_dev_attr(attr)->index;
 442         struct i2c_client *client = to_i2c_client(dev);
 443         struct f75375_data *data = i2c_get_clientdata(client);
 444         unsigned long val;
 445         int err;
 446
 447         err = kstrtoul(buf, 10, &val);
 448         if (err < 0)
 449                 return err;
 450
 451         mutex_lock(&data->update_lock);
 452         err = set_pwm_enable_direct(client, nr, val);
 453         mutex_unlock(&data->update_lock);
 454         return err ? err : count;
 455 }
 456
 457 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 458                 const char *buf, size_t count)
 459 {
 460         int nr = to_sensor_dev_attr(attr)->index;
 461         struct i2c_client *client = to_i2c_client(dev);
 462         struct f75375_data *data = i2c_get_clientdata(client);
 463         unsigned long val;
 464         int err;
 465         u8 conf;
 466         char reg, ctrl;
 467
 468         err = kstrtoul(buf, 10, &val);
 469         if (err < 0)
 470                 return err;
 471
 472         if (!(val == 0 || val == 1))
 473                 return -EINVAL;
 474
 475         /* F75373 does not support DC (linear voltage) fan control mode */
 476         if (data->kind == f75373 && val == 0)
 477                 return -EINVAL;
 478
 479         /* take care for different registers */
 480         if (data->kind == f75387) {
 481                 reg = F75375_REG_FAN_TIMER;
 482                 ctrl = F75387_FAN_CTRL_LINEAR(nr);
 483         } else {
 484                 reg = F75375_REG_CONFIG1;
 485                 ctrl = F75375_FAN_CTRL_LINEAR(nr);
 486         }
 487
 488         mutex_lock(&data->update_lock);
 489         conf = f75375_read8(client, reg);
 490         conf &= ~(1 << ctrl);
 491
 492         if (val == 0)
 493                 conf |= (1 << ctrl);
 494
 495         f75375_write8(client, reg, conf);
 496         data->pwm_mode[nr] = val;
 497         mutex_unlock(&data->update_lock);
 498         return count;
 499 }
 500
 501 static ssize_t show_pwm(struct device *dev, struct device_attribute
 502                 *attr, char *buf)
 503 {
 504         int nr = to_sensor_dev_attr(attr)->index;
 505         struct f75375_data *data = f75375_update_device(dev);
 506         return sprintf(buf, "%d\n", data->pwm[nr]);
 507 }
 508
 509 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
 510                 *attr, char *buf)
 511 {
 512         int nr = to_sensor_dev_attr(attr)->index;
 513         struct f75375_data *data = f75375_update_device(dev);
 514         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
 515 }
 516
 517 #define VOLT_FROM_REG(val) ((val) * 8)
 518 #define VOLT_TO_REG(val) ((val) / 8)
 519
 520 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 521                 char *buf)
 522 {
 523         int nr = to_sensor_dev_attr(attr)->index;
 524         struct f75375_data *data = f75375_update_device(dev);
 525         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
 526 }
 527
 528 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 529                 char *buf)
 530 {
 531         int nr = to_sensor_dev_attr(attr)->index;
 532         struct f75375_data *data = f75375_update_device(dev);
 533         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
 534 }
 535
 536 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 537                 char *buf)
 538 {
 539         int nr = to_sensor_dev_attr(attr)->index;
 540         struct f75375_data *data = f75375_update_device(dev);
 541         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
 542 }
 543
 544 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 545                 const char *buf, size_t count)
 546 {
 547         int nr = to_sensor_dev_attr(attr)->index;
 548         struct i2c_client *client = to_i2c_client(dev);
 549         struct f75375_data *data = i2c_get_clientdata(client);
 550         unsigned long val;
 551         int err;
 552
 553         err = kstrtoul(buf, 10, &val);
 554         if (err < 0)
 555                 return err;
 556
 557         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 558         mutex_lock(&data->update_lock);
 559         data->in_max[nr] = val;
 560         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
 561         mutex_unlock(&data->update_lock);
 562         return count;
 563 }
 564
 565 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 566                 const char *buf, size_t count)
 567 {
 568         int nr = to_sensor_dev_attr(attr)->index;
 569         struct i2c_client *client = to_i2c_client(dev);
 570         struct f75375_data *data = i2c_get_clientdata(client);
 571         unsigned long val;
 572         int err;
 573
 574         err = kstrtoul(buf, 10, &val);
 575         if (err < 0)
 576                 return err;
 577
 578         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 579         mutex_lock(&data->update_lock);
 580         data->in_min[nr] = val;
 581         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
 582         mutex_unlock(&data->update_lock);
 583         return count;
 584 }
 585 #define TEMP_FROM_REG(val) ((val) * 1000)
 586 #define TEMP_TO_REG(val) ((val) / 1000)
 587 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 588
 589 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
 590                 char *buf)
 591 {
 592         int nr = to_sensor_dev_attr(attr)->index;
 593         struct f75375_data *data = f75375_update_device(dev);
 594         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
 595 }
 596
 597 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 598                 char *buf)
 599 {
 600         int nr = to_sensor_dev_attr(attr)->index;
 601         struct f75375_data *data = f75375_update_device(dev);
 602         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 603 }
 604
 605 static ssize_t show_temp_max_hyst(struct device *dev,
 606                 struct device_attribute *attr, char *buf)
 607 {
 608         int nr = to_sensor_dev_attr(attr)->index;
 609         struct f75375_data *data = f75375_update_device(dev);
 610         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
 611 }
 612
 613 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 614                 const char *buf, size_t count)
 615 {
 616         int nr = to_sensor_dev_attr(attr)->index;
 617         struct i2c_client *client = to_i2c_client(dev);
 618         struct f75375_data *data = i2c_get_clientdata(client);
 619         unsigned long val;
 620         int err;
 621
 622         err = kstrtoul(buf, 10, &val);
 623         if (err < 0)
 624                 return err;
 625
 626         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 627         mutex_lock(&data->update_lock);
 628         data->temp_high[nr] = val;
 629         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 630         mutex_unlock(&data->update_lock);
 631         return count;
 632 }
 633
 634 static ssize_t set_temp_max_hyst(struct device *dev,
 635         struct device_attribute *attr, const char *buf, size_t count)
 636 {
 637         int nr = to_sensor_dev_attr(attr)->index;
 638         struct i2c_client *client = to_i2c_client(dev);
 639         struct f75375_data *data = i2c_get_clientdata(client);
 640         unsigned long val;
 641         int err;
 642
 643         err = kstrtoul(buf, 10, &val);
 644         if (err < 0)
 645                 return err;
 646
 647         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 648         mutex_lock(&data->update_lock);
 649         data->temp_max_hyst[nr] = val;
 650         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
 651                 data->temp_max_hyst[nr]);
 652         mutex_unlock(&data->update_lock);
 653         return count;
 654 }
 655
 656 #define show_fan(thing) \
 657 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
 658                         char *buf)\
 659 {\
 660         int nr = to_sensor_dev_attr(attr)->index;\
 661         struct f75375_data *data = f75375_update_device(dev); \
 662         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
 663 }
 664
 665 show_fan(fan);
 666 show_fan(fan_min);
 667 show_fan(fan_max);
 668 show_fan(fan_target);
 669
 670 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 671 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
 672         show_in_max, set_in_max, 0);
 673 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
 674         show_in_min, set_in_min, 0);
 675 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 676 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
 677         show_in_max, set_in_max, 1);
 678 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
 679         show_in_min, set_in_min, 1);
 680 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 681 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
 682         show_in_max, set_in_max, 2);
 683 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
 684         show_in_min, set_in_min, 2);
 685 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 686 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
 687         show_in_max, set_in_max, 3);
 688 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
 689         show_in_min, set_in_min, 3);
 690 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
 691 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
 692         show_temp_max_hyst, set_temp_max_hyst, 0);
 693 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
 694         show_temp_max, set_temp_max, 0);
 695 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
 696 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
 697         show_temp_max_hyst, set_temp_max_hyst, 1);
 698 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
 699         show_temp_max, set_temp_max, 1);
 700 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 701 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
 702 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
 703         show_fan_min, set_fan_min, 0);
 704 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
 705         show_fan_target, set_fan_target, 0);
 706 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 707 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
 708 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
 709         show_fan_min, set_fan_min, 1);
 710 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
 711         show_fan_target, set_fan_target, 1);
 712 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
 713         show_pwm, set_pwm, 0);
 714 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
 715         show_pwm_enable, set_pwm_enable, 0);
 716 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
 717         show_pwm_mode, set_pwm_mode, 0);
 718 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
 719         show_pwm, set_pwm, 1);
 720 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
 721         show_pwm_enable, set_pwm_enable, 1);
 722 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
 723         show_pwm_mode, set_pwm_mode, 1);
 724
 725 static struct attribute *f75375_attributes[] = {
 726         &sensor_dev_attr_temp1_input.dev_attr.attr,
 727         &sensor_dev_attr_temp1_max.dev_attr.attr,
 728         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 729         &sensor_dev_attr_temp2_input.dev_attr.attr,
 730         &sensor_dev_attr_temp2_max.dev_attr.attr,
 731         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 732         &sensor_dev_attr_fan1_input.dev_attr.attr,
 733         &sensor_dev_attr_fan1_max.dev_attr.attr,
 734         &sensor_dev_attr_fan1_min.dev_attr.attr,
 735         &sensor_dev_attr_fan1_target.dev_attr.attr,
 736         &sensor_dev_attr_fan2_input.dev_attr.attr,
 737         &sensor_dev_attr_fan2_max.dev_attr.attr,
 738         &sensor_dev_attr_fan2_min.dev_attr.attr,
 739         &sensor_dev_attr_fan2_target.dev_attr.attr,
 740         &sensor_dev_attr_pwm1.dev_attr.attr,
 741         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 742         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 743         &sensor_dev_attr_pwm2.dev_attr.attr,
 744         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 745         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 746         &sensor_dev_attr_in0_input.dev_attr.attr,
 747         &sensor_dev_attr_in0_max.dev_attr.attr,
 748         &sensor_dev_attr_in0_min.dev_attr.attr,
 749         &sensor_dev_attr_in1_input.dev_attr.attr,
 750         &sensor_dev_attr_in1_max.dev_attr.attr,
 751         &sensor_dev_attr_in1_min.dev_attr.attr,
 752         &sensor_dev_attr_in2_input.dev_attr.attr,
 753         &sensor_dev_attr_in2_max.dev_attr.attr,
 754         &sensor_dev_attr_in2_min.dev_attr.attr,
 755         &sensor_dev_attr_in3_input.dev_attr.attr,
 756         &sensor_dev_attr_in3_max.dev_attr.attr,
 757         &sensor_dev_attr_in3_min.dev_attr.attr,
 758         NULL
 759 };
 760
 761 static const struct attribute_group f75375_group = {
 762         .attrs = f75375_attributes,
 763 };
 764
 765 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
 766                 struct f75375s_platform_data *f75375s_pdata)
 767 {
 768         int nr;
 769
 770         if (!f75375s_pdata) {
 771                 u8 conf, mode;
 772                 int nr;
 773
 774                 conf = f75375_read8(client, F75375_REG_CONFIG1);
 775                 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
 776                 for (nr = 0; nr < 2; nr++) {
 777                         if (data->kind == f75387) {
 778                                 bool manu, duty;
 779
 780                                 if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
 781                                         data->pwm_mode[nr] = 1;
 782
 783                                 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
 784                                 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
 785                                 if (!manu && duty)
 786                                         /* auto, pwm */
 787                                         data->pwm_enable[nr] = 4;
 788                                 else if (manu && !duty)
 789                                         /* manual, speed */
 790                                         data->pwm_enable[nr] = 3;
 791                                 else if (!manu && !duty)
 792                                         /* automatic, speed */
 793                                         data->pwm_enable[nr] = 2;
 794                                 else
 795                                         /* manual, pwm */
 796                                         data->pwm_enable[nr] = 1;
 797                         } else {
 798                                 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
 799                                         data->pwm_mode[nr] = 1;
 800
 801                                 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
 802                                 case 0:         /* speed */
 803                                         data->pwm_enable[nr] = 3;
 804                                         break;
 805                                 case 1:         /* automatic */
 806                                         data->pwm_enable[nr] = 2;
 807                                         break;
 808                                 default:        /* manual */
 809                                         data->pwm_enable[nr] = 1;
 810                                         break;
 811                                 }
 812                         }
 813                 }
 814                 return;
 815         }
 816
 817         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
 818         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
 819         for (nr = 0; nr < 2; nr++) {
 820                 if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
 821                     !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
 822                         continue;
 823                 data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
 824                 f75375_write_pwm(client, nr);
 825         }
 826
 827 }
 828
 829 static int f75375_probe(struct i2c_client *client,
 830                 const struct i2c_device_id *id)
 831 {
 832         struct f75375_data *data;
 833         struct f75375s_platform_data *f75375s_pdata = client->dev.platform_data;
 834         int err;
 835
 836         if (!i2c_check_functionality(client->adapter,
 837                                 I2C_FUNC_SMBUS_BYTE_DATA))
 838                 return -EIO;
 839         data = kzalloc(sizeof(struct f75375_data), GFP_KERNEL);
 840         if (!data)
 841                 return -ENOMEM;
 842
 843         i2c_set_clientdata(client, data);
 844         mutex_init(&data->update_lock);
 845         data->kind = id->driver_data;
 846
 847         err = sysfs_create_group(&client->dev.kobj, &f75375_group);
 848         if (err)
 849                 goto exit_free;
 850
 851         if (data->kind != f75373) {
 852                 err = sysfs_chmod_file(&client->dev.kobj,
 853                         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 854                         S_IRUGO | S_IWUSR);
 855                 if (err)
 856                         goto exit_remove;
 857                 err = sysfs_chmod_file(&client->dev.kobj,
 858                         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 859                         S_IRUGO | S_IWUSR);
 860                 if (err)
 861                         goto exit_remove;
 862         }
 863
 864         data->hwmon_dev = hwmon_device_register(&client->dev);
 865         if (IS_ERR(data->hwmon_dev)) {
 866                 err = PTR_ERR(data->hwmon_dev);
 867                 goto exit_remove;
 868         }
 869
 870         f75375_init(client, data, f75375s_pdata);
 871
 872         return 0;
 873
 874 exit_remove:
 875         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 876 exit_free:
 877         kfree(data);
 878         return err;
 879 }
 880
 881 static int f75375_remove(struct i2c_client *client)
 882 {
 883         struct f75375_data *data = i2c_get_clientdata(client);
 884         hwmon_device_unregister(data->hwmon_dev);
 885         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 886         kfree(data);
 887         return 0;
 888 }
 889
 890 /* Return 0 if detection is successful, -ENODEV otherwise */
 891 static int f75375_detect(struct i2c_client *client,
 892                          struct i2c_board_info *info)
 893 {
 894         struct i2c_adapter *adapter = client->adapter;
 895         u16 vendid, chipid;
 896         u8 version;
 897         const char *name;
 898
 899         vendid = f75375_read16(client, F75375_REG_VENDOR);
 900         chipid = f75375_read16(client, F75375_CHIP_ID);
 901         if (vendid != 0x1934)
 902                 return -ENODEV;
 903
 904         if (chipid == 0x0306)
 905                 name = "f75375";
 906         else if (chipid == 0x0204)
 907                 name = "f75373";
 908         else if (chipid == 0x0410)
 909                 name = "f75387";
 910         else
 911                 return -ENODEV;
 912
 913         version = f75375_read8(client, F75375_REG_VERSION);
 914         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
 915         strlcpy(info->type, name, I2C_NAME_SIZE);
 916
 917         return 0;
 918 }
 919
 920 module_i2c_driver(f75375_driver);
 921
 922 MODULE_AUTHOR("Riku Voipio");
 923 MODULE_LICENSE("GPL");
 924 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");