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                 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
 279                 return true;
 280         }
 281 }
 282
 283 static bool auto_mode_enabled(u8 pwm_enable)
 284 {
 285         switch (pwm_enable) {
 286         case 0: /* Manual, duty mode (full speed) */
 287         case 1: /* Manual, duty mode */
 288         case 3: /* Manual, speed mode */
 289                 return false;
 290         case 2: /* Auto, speed mode */
 291         case 4: /* Auto, duty mode */
 292                 return true;
 293         default:
 294                 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
 295                 return false;
 296         }
 297 }
 298
 299 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 300                 const char *buf, size_t count)
 301 {
 302         int nr = to_sensor_dev_attr(attr)->index;
 303         struct i2c_client *client = to_i2c_client(dev);
 304         struct f75375_data *data = i2c_get_clientdata(client);
 305         unsigned long val;
 306         int err;
 307
 308         err = kstrtoul(buf, 10, &val);
 309         if (err < 0)
 310                 return err;
 311
 312         mutex_lock(&data->update_lock);
 313         data->fan_min[nr] = rpm_to_reg(val);
 314         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
 315         mutex_unlock(&data->update_lock);
 316         return count;
 317 }
 318
 319 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
 320                 const char *buf, size_t count)
 321 {
 322         int nr = to_sensor_dev_attr(attr)->index;
 323         struct i2c_client *client = to_i2c_client(dev);
 324         struct f75375_data *data = i2c_get_clientdata(client);
 325         unsigned long val;
 326         int err;
 327
 328         err = kstrtoul(buf, 10, &val);
 329         if (err < 0)
 330                 return err;
 331
 332         if (auto_mode_enabled(data->pwm_enable[nr]))
 333                 return -EINVAL;
 334         if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
 335                 return -EINVAL;
 336
 337         mutex_lock(&data->update_lock);
 338         data->fan_target[nr] = rpm_to_reg(val);
 339         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
 340         mutex_unlock(&data->update_lock);
 341         return count;
 342 }
 343
 344 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 345                 const char *buf, size_t count)
 346 {
 347         int nr = to_sensor_dev_attr(attr)->index;
 348         struct i2c_client *client = to_i2c_client(dev);
 349         struct f75375_data *data = i2c_get_clientdata(client);
 350         unsigned long val;
 351         int err;
 352
 353         err = kstrtoul(buf, 10, &val);
 354         if (err < 0)
 355                 return err;
 356
 357         if (auto_mode_enabled(data->pwm_enable[nr]) ||
 358             !duty_mode_enabled(data->pwm_enable[nr]))
 359                 return -EINVAL;
 360
 361         mutex_lock(&data->update_lock);
 362         data->pwm[nr] = clamp_val(val, 0, 255);
 363         f75375_write_pwm(client, nr);
 364         mutex_unlock(&data->update_lock);
 365         return count;
 366 }
 367
 368 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 369                 *attr, char *buf)
 370 {
 371         int nr = to_sensor_dev_attr(attr)->index;
 372         struct f75375_data *data = f75375_update_device(dev);
 373         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
 374 }
 375
 376 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
 377 {
 378         struct f75375_data *data = i2c_get_clientdata(client);
 379         u8 fanmode;
 380
 381         if (val < 0 || val > 4)
 382                 return -EINVAL;
 383
 384         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
 385         if (data->kind == f75387) {
 386                 /* For now, deny dangerous toggling of duty mode */
 387                 if (duty_mode_enabled(data->pwm_enable[nr]) !=
 388                                 duty_mode_enabled(val))
 389                         return -EOPNOTSUPP;
 390                 /* clear each fanX_mode bit before setting them properly */
 391                 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
 392                 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
 393                 switch (val) {
 394                 case 0: /* full speed */
 395                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 396                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 397                         data->pwm[nr] = 255;
 398                         break;
 399                 case 1: /* PWM */
 400                         fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
 401                         fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
 402                         break;
 403                 case 2: /* Automatic, speed mode */
 404                         break;
 405                 case 3: /* fan speed */
 406                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 407                         break;
 408                 case 4: /* Automatic, pwm */
 409                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 410                         break;
 411                 }
 412         } else {
 413                 /* clear each fanX_mode bit before setting them properly */
 414                 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
 415                 switch (val) {
 416                 case 0: /* full speed */
 417                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 418                         data->pwm[nr] = 255;
 419                         break;
 420                 case 1: /* PWM */
 421                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 422                         break;
 423                 case 2: /* AUTOMATIC*/
 424                         fanmode  |= (1 << FAN_CTRL_MODE(nr));
 425                         break;
 426                 case 3: /* fan speed */
 427                         break;
 428                 case 4: /* Automatic pwm */
 429                         return -EINVAL;
 430                 }
 431         }
 432
 433         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
 434         data->pwm_enable[nr] = val;
 435         if (val == 0)
 436                 f75375_write_pwm(client, nr);
 437         return 0;
 438 }
 439
 440 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
 441                 const char *buf, size_t count)
 442 {
 443         int nr = to_sensor_dev_attr(attr)->index;
 444         struct i2c_client *client = to_i2c_client(dev);
 445         struct f75375_data *data = i2c_get_clientdata(client);
 446         unsigned long val;
 447         int err;
 448
 449         err = kstrtoul(buf, 10, &val);
 450         if (err < 0)
 451                 return err;
 452
 453         mutex_lock(&data->update_lock);
 454         err = set_pwm_enable_direct(client, nr, val);
 455         mutex_unlock(&data->update_lock);
 456         return err ? err : count;
 457 }
 458
 459 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 460                 const char *buf, size_t count)
 461 {
 462         int nr = to_sensor_dev_attr(attr)->index;
 463         struct i2c_client *client = to_i2c_client(dev);
 464         struct f75375_data *data = i2c_get_clientdata(client);
 465         unsigned long val;
 466         int err;
 467         u8 conf;
 468         char reg, ctrl;
 469
 470         err = kstrtoul(buf, 10, &val);
 471         if (err < 0)
 472                 return err;
 473
 474         if (!(val == 0 || val == 1))
 475                 return -EINVAL;
 476
 477         /* F75373 does not support DC (linear voltage) fan control mode */
 478         if (data->kind == f75373 && val == 0)
 479                 return -EINVAL;
 480
 481         /* take care for different registers */
 482         if (data->kind == f75387) {
 483                 reg = F75375_REG_FAN_TIMER;
 484                 ctrl = F75387_FAN_CTRL_LINEAR(nr);
 485         } else {
 486                 reg = F75375_REG_CONFIG1;
 487                 ctrl = F75375_FAN_CTRL_LINEAR(nr);
 488         }
 489
 490         mutex_lock(&data->update_lock);
 491         conf = f75375_read8(client, reg);
 492         conf &= ~(1 << ctrl);
 493
 494         if (val == 0)
 495                 conf |= (1 << ctrl);
 496
 497         f75375_write8(client, reg, conf);
 498         data->pwm_mode[nr] = val;
 499         mutex_unlock(&data->update_lock);
 500         return count;
 501 }
 502
 503 static ssize_t show_pwm(struct device *dev, struct device_attribute
 504                 *attr, char *buf)
 505 {
 506         int nr = to_sensor_dev_attr(attr)->index;
 507         struct f75375_data *data = f75375_update_device(dev);
 508         return sprintf(buf, "%d\n", data->pwm[nr]);
 509 }
 510
 511 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
 512                 *attr, char *buf)
 513 {
 514         int nr = to_sensor_dev_attr(attr)->index;
 515         struct f75375_data *data = f75375_update_device(dev);
 516         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
 517 }
 518
 519 #define VOLT_FROM_REG(val) ((val) * 8)
 520 #define VOLT_TO_REG(val) ((val) / 8)
 521
 522 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 523                 char *buf)
 524 {
 525         int nr = to_sensor_dev_attr(attr)->index;
 526         struct f75375_data *data = f75375_update_device(dev);
 527         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
 528 }
 529
 530 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 531                 char *buf)
 532 {
 533         int nr = to_sensor_dev_attr(attr)->index;
 534         struct f75375_data *data = f75375_update_device(dev);
 535         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
 536 }
 537
 538 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 539                 char *buf)
 540 {
 541         int nr = to_sensor_dev_attr(attr)->index;
 542         struct f75375_data *data = f75375_update_device(dev);
 543         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
 544 }
 545
 546 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 547                 const char *buf, size_t count)
 548 {
 549         int nr = to_sensor_dev_attr(attr)->index;
 550         struct i2c_client *client = to_i2c_client(dev);
 551         struct f75375_data *data = i2c_get_clientdata(client);
 552         unsigned long val;
 553         int err;
 554
 555         err = kstrtoul(buf, 10, &val);
 556         if (err < 0)
 557                 return err;
 558
 559         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
 560         mutex_lock(&data->update_lock);
 561         data->in_max[nr] = val;
 562         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
 563         mutex_unlock(&data->update_lock);
 564         return count;
 565 }
 566
 567 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 568                 const char *buf, size_t count)
 569 {
 570         int nr = to_sensor_dev_attr(attr)->index;
 571         struct i2c_client *client = to_i2c_client(dev);
 572         struct f75375_data *data = i2c_get_clientdata(client);
 573         unsigned long val;
 574         int err;
 575
 576         err = kstrtoul(buf, 10, &val);
 577         if (err < 0)
 578                 return err;
 579
 580         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
 581         mutex_lock(&data->update_lock);
 582         data->in_min[nr] = val;
 583         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
 584         mutex_unlock(&data->update_lock);
 585         return count;
 586 }
 587 #define TEMP_FROM_REG(val) ((val) * 1000)
 588 #define TEMP_TO_REG(val) ((val) / 1000)
 589 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 590
 591 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
 592                 char *buf)
 593 {
 594         int nr = to_sensor_dev_attr(attr)->index;
 595         struct f75375_data *data = f75375_update_device(dev);
 596         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
 597 }
 598
 599 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 600                 char *buf)
 601 {
 602         int nr = to_sensor_dev_attr(attr)->index;
 603         struct f75375_data *data = f75375_update_device(dev);
 604         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 605 }
 606
 607 static ssize_t show_temp_max_hyst(struct device *dev,
 608                 struct device_attribute *attr, char *buf)
 609 {
 610         int nr = to_sensor_dev_attr(attr)->index;
 611         struct f75375_data *data = f75375_update_device(dev);
 612         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
 613 }
 614
 615 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 616                 const char *buf, size_t count)
 617 {
 618         int nr = to_sensor_dev_attr(attr)->index;
 619         struct i2c_client *client = to_i2c_client(dev);
 620         struct f75375_data *data = i2c_get_clientdata(client);
 621         unsigned long val;
 622         int err;
 623
 624         err = kstrtoul(buf, 10, &val);
 625         if (err < 0)
 626                 return err;
 627
 628         val = clamp_val(TEMP_TO_REG(val), 0, 127);
 629         mutex_lock(&data->update_lock);
 630         data->temp_high[nr] = val;
 631         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 632         mutex_unlock(&data->update_lock);
 633         return count;
 634 }
 635
 636 static ssize_t set_temp_max_hyst(struct device *dev,
 637         struct device_attribute *attr, const char *buf, size_t count)
 638 {
 639         int nr = to_sensor_dev_attr(attr)->index;
 640         struct i2c_client *client = to_i2c_client(dev);
 641         struct f75375_data *data = i2c_get_clientdata(client);
 642         unsigned long val;
 643         int err;
 644
 645         err = kstrtoul(buf, 10, &val);
 646         if (err < 0)
 647                 return err;
 648
 649         val = clamp_val(TEMP_TO_REG(val), 0, 127);
 650         mutex_lock(&data->update_lock);
 651         data->temp_max_hyst[nr] = val;
 652         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
 653                 data->temp_max_hyst[nr]);
 654         mutex_unlock(&data->update_lock);
 655         return count;
 656 }
 657
 658 #define show_fan(thing) \
 659 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
 660                         char *buf)\
 661 {\
 662         int nr = to_sensor_dev_attr(attr)->index;\
 663         struct f75375_data *data = f75375_update_device(dev); \
 664         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
 665 }
 666
 667 show_fan(fan);
 668 show_fan(fan_min);
 669 show_fan(fan_max);
 670 show_fan(fan_target);
 671
 672 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 673 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
 674         show_in_max, set_in_max, 0);
 675 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
 676         show_in_min, set_in_min, 0);
 677 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 678 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
 679         show_in_max, set_in_max, 1);
 680 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
 681         show_in_min, set_in_min, 1);
 682 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 683 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
 684         show_in_max, set_in_max, 2);
 685 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
 686         show_in_min, set_in_min, 2);
 687 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 688 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
 689         show_in_max, set_in_max, 3);
 690 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
 691         show_in_min, set_in_min, 3);
 692 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
 693 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
 694         show_temp_max_hyst, set_temp_max_hyst, 0);
 695 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
 696         show_temp_max, set_temp_max, 0);
 697 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
 698 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
 699         show_temp_max_hyst, set_temp_max_hyst, 1);
 700 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
 701         show_temp_max, set_temp_max, 1);
 702 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 703 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
 704 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
 705         show_fan_min, set_fan_min, 0);
 706 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
 707         show_fan_target, set_fan_target, 0);
 708 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 709 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
 710 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
 711         show_fan_min, set_fan_min, 1);
 712 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
 713         show_fan_target, set_fan_target, 1);
 714 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
 715         show_pwm, set_pwm, 0);
 716 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
 717         show_pwm_enable, set_pwm_enable, 0);
 718 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
 719         show_pwm_mode, set_pwm_mode, 0);
 720 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
 721         show_pwm, set_pwm, 1);
 722 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
 723         show_pwm_enable, set_pwm_enable, 1);
 724 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
 725         show_pwm_mode, set_pwm_mode, 1);
 726
 727 static struct attribute *f75375_attributes[] = {
 728         &sensor_dev_attr_temp1_input.dev_attr.attr,
 729         &sensor_dev_attr_temp1_max.dev_attr.attr,
 730         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 731         &sensor_dev_attr_temp2_input.dev_attr.attr,
 732         &sensor_dev_attr_temp2_max.dev_attr.attr,
 733         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 734         &sensor_dev_attr_fan1_input.dev_attr.attr,
 735         &sensor_dev_attr_fan1_max.dev_attr.attr,
 736         &sensor_dev_attr_fan1_min.dev_attr.attr,
 737         &sensor_dev_attr_fan1_target.dev_attr.attr,
 738         &sensor_dev_attr_fan2_input.dev_attr.attr,
 739         &sensor_dev_attr_fan2_max.dev_attr.attr,
 740         &sensor_dev_attr_fan2_min.dev_attr.attr,
 741         &sensor_dev_attr_fan2_target.dev_attr.attr,
 742         &sensor_dev_attr_pwm1.dev_attr.attr,
 743         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 744         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 745         &sensor_dev_attr_pwm2.dev_attr.attr,
 746         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 747         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 748         &sensor_dev_attr_in0_input.dev_attr.attr,
 749         &sensor_dev_attr_in0_max.dev_attr.attr,
 750         &sensor_dev_attr_in0_min.dev_attr.attr,
 751         &sensor_dev_attr_in1_input.dev_attr.attr,
 752         &sensor_dev_attr_in1_max.dev_attr.attr,
 753         &sensor_dev_attr_in1_min.dev_attr.attr,
 754         &sensor_dev_attr_in2_input.dev_attr.attr,
 755         &sensor_dev_attr_in2_max.dev_attr.attr,
 756         &sensor_dev_attr_in2_min.dev_attr.attr,
 757         &sensor_dev_attr_in3_input.dev_attr.attr,
 758         &sensor_dev_attr_in3_max.dev_attr.attr,
 759         &sensor_dev_attr_in3_min.dev_attr.attr,
 760         NULL
 761 };
 762
 763 static const struct attribute_group f75375_group = {
 764         .attrs = f75375_attributes,
 765 };
 766
 767 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
 768                 struct f75375s_platform_data *f75375s_pdata)
 769 {
 770         int nr;
 771
 772         if (!f75375s_pdata) {
 773                 u8 conf, mode;
 774                 int nr;
 775
 776                 conf = f75375_read8(client, F75375_REG_CONFIG1);
 777                 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
 778                 for (nr = 0; nr < 2; nr++) {
 779                         if (data->kind == f75387) {
 780                                 bool manu, duty;
 781
 782                                 if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
 783                                         data->pwm_mode[nr] = 1;
 784
 785                                 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
 786                                 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
 787                                 if (!manu && duty)
 788                                         /* auto, pwm */
 789                                         data->pwm_enable[nr] = 4;
 790                                 else if (manu && !duty)
 791                                         /* manual, speed */
 792                                         data->pwm_enable[nr] = 3;
 793                                 else if (!manu && !duty)
 794                                         /* automatic, speed */
 795                                         data->pwm_enable[nr] = 2;
 796                                 else
 797                                         /* manual, pwm */
 798                                         data->pwm_enable[nr] = 1;
 799                         } else {
 800                                 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
 801                                         data->pwm_mode[nr] = 1;
 802
 803                                 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
 804                                 case 0:         /* speed */
 805                                         data->pwm_enable[nr] = 3;
 806                                         break;
 807                                 case 1:         /* automatic */
 808                                         data->pwm_enable[nr] = 2;
 809                                         break;
 810                                 default:        /* manual */
 811                                         data->pwm_enable[nr] = 1;
 812                                         break;
 813                                 }
 814                         }
 815                 }
 816                 return;
 817         }
 818
 819         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
 820         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
 821         for (nr = 0; nr < 2; nr++) {
 822                 if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
 823                     !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
 824                         continue;
 825                 data->pwm[nr] = clamp_val(f75375s_pdata->pwm[nr], 0, 255);
 826                 f75375_write_pwm(client, nr);
 827         }
 828
 829 }
 830
 831 static int f75375_probe(struct i2c_client *client,
 832                 const struct i2c_device_id *id)
 833 {
 834         struct f75375_data *data;
 835         struct f75375s_platform_data *f75375s_pdata =
 836                         dev_get_platdata(&client->dev);
 837         int err;
 838
 839         if (!i2c_check_functionality(client->adapter,
 840                                 I2C_FUNC_SMBUS_BYTE_DATA))
 841                 return -EIO;
 842         data = devm_kzalloc(&client->dev, sizeof(struct f75375_data),
 843                             GFP_KERNEL);
 844         if (!data)
 845                 return -ENOMEM;
 846
 847         i2c_set_clientdata(client, data);
 848         mutex_init(&data->update_lock);
 849         data->kind = id->driver_data;
 850
 851         err = sysfs_create_group(&client->dev.kobj, &f75375_group);
 852         if (err)
 853                 return err;
 854
 855         if (data->kind != f75373) {
 856                 err = sysfs_chmod_file(&client->dev.kobj,
 857                         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 858                         S_IRUGO | S_IWUSR);
 859                 if (err)
 860                         goto exit_remove;
 861                 err = sysfs_chmod_file(&client->dev.kobj,
 862                         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 863                         S_IRUGO | S_IWUSR);
 864                 if (err)
 865                         goto exit_remove;
 866         }
 867
 868         data->hwmon_dev = hwmon_device_register(&client->dev);
 869         if (IS_ERR(data->hwmon_dev)) {
 870                 err = PTR_ERR(data->hwmon_dev);
 871                 goto exit_remove;
 872         }
 873
 874         f75375_init(client, data, f75375s_pdata);
 875
 876         return 0;
 877
 878 exit_remove:
 879         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 880         return err;
 881 }
 882
 883 static int f75375_remove(struct i2c_client *client)
 884 {
 885         struct f75375_data *data = i2c_get_clientdata(client);
 886         hwmon_device_unregister(data->hwmon_dev);
 887         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 888         return 0;
 889 }
 890
 891 /* Return 0 if detection is successful, -ENODEV otherwise */
 892 static int f75375_detect(struct i2c_client *client,
 893                          struct i2c_board_info *info)
 894 {
 895         struct i2c_adapter *adapter = client->adapter;
 896         u16 vendid, chipid;
 897         u8 version;
 898         const char *name;
 899
 900         vendid = f75375_read16(client, F75375_REG_VENDOR);
 901         chipid = f75375_read16(client, F75375_CHIP_ID);
 902         if (vendid != 0x1934)
 903                 return -ENODEV;
 904
 905         if (chipid == 0x0306)
 906                 name = "f75375";
 907         else if (chipid == 0x0204)
 908                 name = "f75373";
 909         else if (chipid == 0x0410)
 910                 name = "f75387";
 911         else
 912                 return -ENODEV;
 913
 914         version = f75375_read8(client, F75375_REG_VERSION);
 915         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
 916         strlcpy(info->type, name, I2C_NAME_SIZE);
 917
 918         return 0;
 919 }
 920
 921 module_i2c_driver(f75375_driver);
 922
 923 MODULE_AUTHOR("Riku Voipio");
 924 MODULE_LICENSE("GPL");
 925 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");