drivers/hwmon/f75375s.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * f75375s.c - driver for the Fintek F75375/SP, F75373 and
   4  *             F75387SG/RG hardware monitoring features
   5  * Copyright (C) 2006-2007  Riku Voipio
   6  *
   7  * Datasheets available at:
   8  *
   9  * f75375:
  10  * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf
  11  *
  12  * f75373:
  13  * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf
  14  *
  15  * f75387:
  16  * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/jiffies.h>
  21 #include <linux/hwmon.h>
  22 #include <linux/hwmon-sysfs.h>
  23 #include <linux/i2c.h>
  24 #include <linux/err.h>
  25 #include <linux/mutex.h>
  26 #include <linux/f75375s.h>
  27 #include <linux/slab.h>
  28
  29 /* Addresses to scan */
  30 static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
  31
  32 enum chips { f75373, f75375, f75387 };
  33
  34 /* Fintek F75375 registers  */
  35 #define F75375_REG_CONFIG0              0x0
  36 #define F75375_REG_CONFIG1              0x1
  37 #define F75375_REG_CONFIG2              0x2
  38 #define F75375_REG_CONFIG3              0x3
  39 #define F75375_REG_ADDR                 0x4
  40 #define F75375_REG_INTR                 0x31
  41 #define F75375_CHIP_ID                  0x5A
  42 #define F75375_REG_VERSION              0x5C
  43 #define F75375_REG_VENDOR               0x5D
  44 #define F75375_REG_FAN_TIMER            0x60
  45
  46 #define F75375_REG_VOLT(nr)             (0x10 + (nr))
  47 #define F75375_REG_VOLT_HIGH(nr)        (0x20 + (nr) * 2)
  48 #define F75375_REG_VOLT_LOW(nr)         (0x21 + (nr) * 2)
  49
  50 #define F75375_REG_TEMP(nr)             (0x14 + (nr))
  51 #define F75387_REG_TEMP11_LSB(nr)       (0x1a + (nr))
  52 #define F75375_REG_TEMP_HIGH(nr)        (0x28 + (nr) * 2)
  53 #define F75375_REG_TEMP_HYST(nr)        (0x29 + (nr) * 2)
  54
  55 #define F75375_REG_FAN(nr)              (0x16 + (nr) * 2)
  56 #define F75375_REG_FAN_MIN(nr)          (0x2C + (nr) * 2)
  57 #define F75375_REG_FAN_FULL(nr)         (0x70 + (nr) * 0x10)
  58 #define F75375_REG_FAN_PWM_DUTY(nr)     (0x76 + (nr) * 0x10)
  59 #define F75375_REG_FAN_PWM_CLOCK(nr)    (0x7D + (nr) * 0x10)
  60
  61 #define F75375_REG_FAN_EXP(nr)          (0x74 + (nr) * 0x10)
  62 #define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
  63 #define F75375_REG_FAN_B_SPEED(nr, step) \
  64         ((0xA5 + (nr) * 0x10) + (step) * 2)
  65
  66 #define F75375_REG_PWM1_RAISE_DUTY      0x69
  67 #define F75375_REG_PWM2_RAISE_DUTY      0x6A
  68 #define F75375_REG_PWM1_DROP_DUTY       0x6B
  69 #define F75375_REG_PWM2_DROP_DUTY       0x6C
  70
  71 #define F75375_FAN_CTRL_LINEAR(nr)      (4 + nr)
  72 #define F75387_FAN_CTRL_LINEAR(nr)      (1 + ((nr) * 4))
  73 #define FAN_CTRL_MODE(nr)               (4 + ((nr) * 2))
  74 #define F75387_FAN_DUTY_MODE(nr)        (2 + ((nr) * 4))
  75 #define F75387_FAN_MANU_MODE(nr)        ((nr) * 4)
  76
  77 /*
  78  * Data structures and manipulation thereof
  79  */
  80
  81 struct f75375_data {
  82         unsigned short addr;
  83         struct device *hwmon_dev;
  84
  85         const char *name;
  86         int kind;
  87         struct mutex update_lock; /* protect register access */
  88         bool valid;
  89         unsigned long last_updated;     /* In jiffies */
  90         unsigned long last_limits;      /* In jiffies */
  91
  92         /* Register values */
  93         u8 in[4];
  94         u8 in_max[4];
  95         u8 in_min[4];
  96         u16 fan[2];
  97         u16 fan_min[2];
  98         u16 fan_max[2];
  99         u16 fan_target[2];
 100         u8 fan_timer;
 101         u8 pwm[2];
 102         u8 pwm_mode[2];
 103         u8 pwm_enable[2];
 104         /*
 105          * f75387: For remote temperature reading, it uses signed 11-bit
 106          * values with LSB = 0.125 degree Celsius, left-justified in 16-bit
 107          * registers. For original 8-bit temp readings, the LSB just is 0.
 108          */
 109         s16 temp11[2];
 110         s8 temp_high[2];
 111         s8 temp_max_hyst[2];
 112 };
 113
 114 static int f75375_detect(struct i2c_client *client,
 115                          struct i2c_board_info *info);
 116 static int f75375_probe(struct i2c_client *client);
 117 static void f75375_remove(struct i2c_client *client);
 118
 119 static const struct i2c_device_id f75375_id[] = {
 120         { "f75373", f75373 },
 121         { "f75375", f75375 },
 122         { "f75387", f75387 },
 123         { }
 124 };
 125 MODULE_DEVICE_TABLE(i2c, f75375_id);
 126
 127 static struct i2c_driver f75375_driver = {
 128         .class = I2C_CLASS_HWMON,
 129         .driver = {
 130                 .name = "f75375",
 131         },
 132         .probe = f75375_probe,
 133         .remove = f75375_remove,
 134         .id_table = f75375_id,
 135         .detect = f75375_detect,
 136         .address_list = normal_i2c,
 137 };
 138
 139 static inline int f75375_read8(struct i2c_client *client, u8 reg)
 140 {
 141         return i2c_smbus_read_byte_data(client, reg);
 142 }
 143
 144 /* in most cases, should be called while holding update_lock */
 145 static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
 146 {
 147         return (i2c_smbus_read_byte_data(client, reg) << 8)
 148                 | i2c_smbus_read_byte_data(client, reg + 1);
 149 }
 150
 151 static inline void f75375_write8(struct i2c_client *client, u8 reg,
 152                 u8 value)
 153 {
 154         i2c_smbus_write_byte_data(client, reg, value);
 155 }
 156
 157 static inline void f75375_write16(struct i2c_client *client, u8 reg,
 158                 u16 value)
 159 {
 160         int err = i2c_smbus_write_byte_data(client, reg, (value >> 8));
 161         if (err)
 162                 return;
 163         i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
 164 }
 165
 166 static void f75375_write_pwm(struct i2c_client *client, int nr)
 167 {
 168         struct f75375_data *data = i2c_get_clientdata(client);
 169         if (data->kind == f75387)
 170                 f75375_write16(client, F75375_REG_FAN_EXP(nr), data->pwm[nr]);
 171         else
 172                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 173                               data->pwm[nr]);
 174 }
 175
 176 static struct f75375_data *f75375_update_device(struct device *dev)
 177 {
 178         struct i2c_client *client = to_i2c_client(dev);
 179         struct f75375_data *data = i2c_get_clientdata(client);
 180         int nr;
 181
 182         mutex_lock(&data->update_lock);
 183
 184         /* Limit registers cache is refreshed after 60 seconds */
 185         if (time_after(jiffies, data->last_limits + 60 * HZ)
 186                 || !data->valid) {
 187                 for (nr = 0; nr < 2; nr++) {
 188                         data->temp_high[nr] =
 189                                 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
 190                         data->temp_max_hyst[nr] =
 191                                 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
 192                         data->fan_max[nr] =
 193                                 f75375_read16(client, F75375_REG_FAN_FULL(nr));
 194                         data->fan_min[nr] =
 195                                 f75375_read16(client, F75375_REG_FAN_MIN(nr));
 196                         data->fan_target[nr] =
 197                                 f75375_read16(client, F75375_REG_FAN_EXP(nr));
 198                 }
 199                 for (nr = 0; nr < 4; nr++) {
 200                         data->in_max[nr] =
 201                                 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
 202                         data->in_min[nr] =
 203                                 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
 204                 }
 205                 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
 206                 data->last_limits = jiffies;
 207         }
 208
 209         /* Measurement registers cache is refreshed after 2 second */
 210         if (time_after(jiffies, data->last_updated + 2 * HZ)
 211                 || !data->valid) {
 212                 for (nr = 0; nr < 2; nr++) {
 213                         data->pwm[nr] = f75375_read8(client,
 214                                 F75375_REG_FAN_PWM_DUTY(nr));
 215                         /* assign MSB, therefore shift it by 8 bits */
 216                         data->temp11[nr] =
 217                                 f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
 218                         if (data->kind == f75387)
 219                                 /* merge F75387's temperature LSB (11-bit) */
 220                                 data->temp11[nr] |=
 221                                         f75375_read8(client,
 222                                                      F75387_REG_TEMP11_LSB(nr));
 223                         data->fan[nr] =
 224                                 f75375_read16(client, F75375_REG_FAN(nr));
 225                 }
 226                 for (nr = 0; nr < 4; nr++)
 227                         data->in[nr] =
 228                                 f75375_read8(client, F75375_REG_VOLT(nr));
 229
 230                 data->last_updated = jiffies;
 231                 data->valid = true;
 232         }
 233
 234         mutex_unlock(&data->update_lock);
 235         return data;
 236 }
 237
 238 static inline u16 rpm_from_reg(u16 reg)
 239 {
 240         if (reg == 0 || reg == 0xffff)
 241                 return 0;
 242         return 1500000 / reg;
 243 }
 244
 245 static inline u16 rpm_to_reg(int rpm)
 246 {
 247         if (rpm < 367 || rpm > 0xffff)
 248                 return 0xffff;
 249         return 1500000 / rpm;
 250 }
 251
 252 static bool duty_mode_enabled(u8 pwm_enable)
 253 {
 254         switch (pwm_enable) {
 255         case 0: /* Manual, duty mode (full speed) */
 256         case 1: /* Manual, duty mode */
 257         case 4: /* Auto, duty mode */
 258                 return true;
 259         case 2: /* Auto, speed mode */
 260         case 3: /* Manual, speed mode */
 261                 return false;
 262         default:
 263                 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
 264                 return true;
 265         }
 266 }
 267
 268 static bool auto_mode_enabled(u8 pwm_enable)
 269 {
 270         switch (pwm_enable) {
 271         case 0: /* Manual, duty mode (full speed) */
 272         case 1: /* Manual, duty mode */
 273         case 3: /* Manual, speed mode */
 274                 return false;
 275         case 2: /* Auto, speed mode */
 276         case 4: /* Auto, duty mode */
 277                 return true;
 278         default:
 279                 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
 280                 return false;
 281         }
 282 }
 283
 284 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 285                 const char *buf, size_t count)
 286 {
 287         int nr = to_sensor_dev_attr(attr)->index;
 288         struct i2c_client *client = to_i2c_client(dev);
 289         struct f75375_data *data = i2c_get_clientdata(client);
 290         unsigned long val;
 291         int err;
 292
 293         err = kstrtoul(buf, 10, &val);
 294         if (err < 0)
 295                 return err;
 296
 297         mutex_lock(&data->update_lock);
 298         data->fan_min[nr] = rpm_to_reg(val);
 299         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
 300         mutex_unlock(&data->update_lock);
 301         return count;
 302 }
 303
 304 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
 305                 const char *buf, size_t count)
 306 {
 307         int nr = to_sensor_dev_attr(attr)->index;
 308         struct i2c_client *client = to_i2c_client(dev);
 309         struct f75375_data *data = i2c_get_clientdata(client);
 310         unsigned long val;
 311         int err;
 312
 313         err = kstrtoul(buf, 10, &val);
 314         if (err < 0)
 315                 return err;
 316
 317         if (auto_mode_enabled(data->pwm_enable[nr]))
 318                 return -EINVAL;
 319         if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
 320                 return -EINVAL;
 321
 322         mutex_lock(&data->update_lock);
 323         data->fan_target[nr] = rpm_to_reg(val);
 324         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
 325         mutex_unlock(&data->update_lock);
 326         return count;
 327 }
 328
 329 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 330                 const char *buf, size_t count)
 331 {
 332         int nr = to_sensor_dev_attr(attr)->index;
 333         struct i2c_client *client = to_i2c_client(dev);
 334         struct f75375_data *data = i2c_get_clientdata(client);
 335         unsigned long val;
 336         int err;
 337
 338         err = kstrtoul(buf, 10, &val);
 339         if (err < 0)
 340                 return err;
 341
 342         if (auto_mode_enabled(data->pwm_enable[nr]) ||
 343             !duty_mode_enabled(data->pwm_enable[nr]))
 344                 return -EINVAL;
 345
 346         mutex_lock(&data->update_lock);
 347         data->pwm[nr] = clamp_val(val, 0, 255);
 348         f75375_write_pwm(client, nr);
 349         mutex_unlock(&data->update_lock);
 350         return count;
 351 }
 352
 353 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 354                 *attr, char *buf)
 355 {
 356         int nr = to_sensor_dev_attr(attr)->index;
 357         struct f75375_data *data = f75375_update_device(dev);
 358         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
 359 }
 360
 361 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
 362 {
 363         struct f75375_data *data = i2c_get_clientdata(client);
 364         u8 fanmode;
 365
 366         if (val < 0 || val > 4)
 367                 return -EINVAL;
 368
 369         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
 370         if (data->kind == f75387) {
 371                 /* For now, deny dangerous toggling of duty mode */
 372                 if (duty_mode_enabled(data->pwm_enable[nr]) !=
 373                                 duty_mode_enabled(val))
 374                         return -EOPNOTSUPP;
 375                 /* clear each fanX_mode bit before setting them properly */
 376                 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
 377                 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
 378                 switch (val) {
 379                 case 0: /* full speed */
 380                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 381                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 382                         data->pwm[nr] = 255;
 383                         break;
 384                 case 1: /* PWM */
 385                         fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
 386                         fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
 387                         break;
 388                 case 2: /* Automatic, speed mode */
 389                         break;
 390                 case 3: /* fan speed */
 391                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 392                         break;
 393                 case 4: /* Automatic, pwm */
 394                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 395                         break;
 396                 }
 397         } else {
 398                 /* clear each fanX_mode bit before setting them properly */
 399                 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
 400                 switch (val) {
 401                 case 0: /* full speed */
 402                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 403                         data->pwm[nr] = 255;
 404                         break;
 405                 case 1: /* PWM */
 406                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 407                         break;
 408                 case 2: /* AUTOMATIC*/
 409                         fanmode  |= (1 << FAN_CTRL_MODE(nr));
 410                         break;
 411                 case 3: /* fan speed */
 412                         break;
 413                 case 4: /* Automatic pwm */
 414                         return -EINVAL;
 415                 }
 416         }
 417
 418         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
 419         data->pwm_enable[nr] = val;
 420         if (val == 0)
 421                 f75375_write_pwm(client, nr);
 422         return 0;
 423 }
 424
 425 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
 426                 const char *buf, size_t count)
 427 {
 428         int nr = to_sensor_dev_attr(attr)->index;
 429         struct i2c_client *client = to_i2c_client(dev);
 430         struct f75375_data *data = i2c_get_clientdata(client);
 431         unsigned long val;
 432         int err;
 433
 434         err = kstrtoul(buf, 10, &val);
 435         if (err < 0)
 436                 return err;
 437
 438         mutex_lock(&data->update_lock);
 439         err = set_pwm_enable_direct(client, nr, val);
 440         mutex_unlock(&data->update_lock);
 441         return err ? err : count;
 442 }
 443
 444 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 445                 const char *buf, size_t count)
 446 {
 447         int nr = to_sensor_dev_attr(attr)->index;
 448         struct i2c_client *client = to_i2c_client(dev);
 449         struct f75375_data *data = i2c_get_clientdata(client);
 450         unsigned long val;
 451         int err;
 452         u8 conf;
 453         char reg, ctrl;
 454
 455         err = kstrtoul(buf, 10, &val);
 456         if (err < 0)
 457                 return err;
 458
 459         if (!(val == 0 || val == 1))
 460                 return -EINVAL;
 461
 462         /* F75373 does not support DC (linear voltage) fan control mode */
 463         if (data->kind == f75373 && val == 0)
 464                 return -EINVAL;
 465
 466         /* take care for different registers */
 467         if (data->kind == f75387) {
 468                 reg = F75375_REG_FAN_TIMER;
 469                 ctrl = F75387_FAN_CTRL_LINEAR(nr);
 470         } else {
 471                 reg = F75375_REG_CONFIG1;
 472                 ctrl = F75375_FAN_CTRL_LINEAR(nr);
 473         }
 474
 475         mutex_lock(&data->update_lock);
 476         conf = f75375_read8(client, reg);
 477         conf &= ~(1 << ctrl);
 478
 479         if (val == 0)
 480                 conf |= (1 << ctrl);
 481
 482         f75375_write8(client, reg, conf);
 483         data->pwm_mode[nr] = val;
 484         mutex_unlock(&data->update_lock);
 485         return count;
 486 }
 487
 488 static ssize_t show_pwm(struct device *dev, struct device_attribute
 489                 *attr, char *buf)
 490 {
 491         int nr = to_sensor_dev_attr(attr)->index;
 492         struct f75375_data *data = f75375_update_device(dev);
 493         return sprintf(buf, "%d\n", data->pwm[nr]);
 494 }
 495
 496 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
 497                 *attr, char *buf)
 498 {
 499         int nr = to_sensor_dev_attr(attr)->index;
 500         struct f75375_data *data = f75375_update_device(dev);
 501         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
 502 }
 503
 504 #define VOLT_FROM_REG(val) ((val) * 8)
 505 #define VOLT_TO_REG(val) ((val) / 8)
 506
 507 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 508                 char *buf)
 509 {
 510         int nr = to_sensor_dev_attr(attr)->index;
 511         struct f75375_data *data = f75375_update_device(dev);
 512         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
 513 }
 514
 515 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 516                 char *buf)
 517 {
 518         int nr = to_sensor_dev_attr(attr)->index;
 519         struct f75375_data *data = f75375_update_device(dev);
 520         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
 521 }
 522
 523 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 524                 char *buf)
 525 {
 526         int nr = to_sensor_dev_attr(attr)->index;
 527         struct f75375_data *data = f75375_update_device(dev);
 528         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
 529 }
 530
 531 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 532                 const char *buf, size_t count)
 533 {
 534         int nr = to_sensor_dev_attr(attr)->index;
 535         struct i2c_client *client = to_i2c_client(dev);
 536         struct f75375_data *data = i2c_get_clientdata(client);
 537         unsigned long val;
 538         int err;
 539
 540         err = kstrtoul(buf, 10, &val);
 541         if (err < 0)
 542                 return err;
 543
 544         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
 545         mutex_lock(&data->update_lock);
 546         data->in_max[nr] = val;
 547         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
 548         mutex_unlock(&data->update_lock);
 549         return count;
 550 }
 551
 552 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 553                 const char *buf, size_t count)
 554 {
 555         int nr = to_sensor_dev_attr(attr)->index;
 556         struct i2c_client *client = to_i2c_client(dev);
 557         struct f75375_data *data = i2c_get_clientdata(client);
 558         unsigned long val;
 559         int err;
 560
 561         err = kstrtoul(buf, 10, &val);
 562         if (err < 0)
 563                 return err;
 564
 565         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
 566         mutex_lock(&data->update_lock);
 567         data->in_min[nr] = val;
 568         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
 569         mutex_unlock(&data->update_lock);
 570         return count;
 571 }
 572 #define TEMP_FROM_REG(val) ((val) * 1000)
 573 #define TEMP_TO_REG(val) ((val) / 1000)
 574 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 575
 576 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
 577                 char *buf)
 578 {
 579         int nr = to_sensor_dev_attr(attr)->index;
 580         struct f75375_data *data = f75375_update_device(dev);
 581         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
 582 }
 583
 584 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 585                 char *buf)
 586 {
 587         int nr = to_sensor_dev_attr(attr)->index;
 588         struct f75375_data *data = f75375_update_device(dev);
 589         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 590 }
 591
 592 static ssize_t show_temp_max_hyst(struct device *dev,
 593                 struct device_attribute *attr, char *buf)
 594 {
 595         int nr = to_sensor_dev_attr(attr)->index;
 596         struct f75375_data *data = f75375_update_device(dev);
 597         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
 598 }
 599
 600 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 601                 const char *buf, size_t count)
 602 {
 603         int nr = to_sensor_dev_attr(attr)->index;
 604         struct i2c_client *client = to_i2c_client(dev);
 605         struct f75375_data *data = i2c_get_clientdata(client);
 606         unsigned long val;
 607         int err;
 608
 609         err = kstrtoul(buf, 10, &val);
 610         if (err < 0)
 611                 return err;
 612
 613         val = clamp_val(TEMP_TO_REG(val), 0, 127);
 614         mutex_lock(&data->update_lock);
 615         data->temp_high[nr] = val;
 616         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 617         mutex_unlock(&data->update_lock);
 618         return count;
 619 }
 620
 621 static ssize_t set_temp_max_hyst(struct device *dev,
 622         struct device_attribute *attr, const char *buf, size_t count)
 623 {
 624         int nr = to_sensor_dev_attr(attr)->index;
 625         struct i2c_client *client = to_i2c_client(dev);
 626         struct f75375_data *data = i2c_get_clientdata(client);
 627         unsigned long val;
 628         int err;
 629
 630         err = kstrtoul(buf, 10, &val);
 631         if (err < 0)
 632                 return err;
 633
 634         val = clamp_val(TEMP_TO_REG(val), 0, 127);
 635         mutex_lock(&data->update_lock);
 636         data->temp_max_hyst[nr] = val;
 637         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
 638                 data->temp_max_hyst[nr]);
 639         mutex_unlock(&data->update_lock);
 640         return count;
 641 }
 642
 643 #define show_fan(thing) \
 644 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
 645                         char *buf)\
 646 {\
 647         int nr = to_sensor_dev_attr(attr)->index;\
 648         struct f75375_data *data = f75375_update_device(dev); \
 649         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
 650 }
 651
 652 show_fan(fan);
 653 show_fan(fan_min);
 654 show_fan(fan_max);
 655 show_fan(fan_target);
 656
 657 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 658 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
 659         show_in_max, set_in_max, 0);
 660 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
 661         show_in_min, set_in_min, 0);
 662 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 663 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
 664         show_in_max, set_in_max, 1);
 665 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
 666         show_in_min, set_in_min, 1);
 667 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 668 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
 669         show_in_max, set_in_max, 2);
 670 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
 671         show_in_min, set_in_min, 2);
 672 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 673 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
 674         show_in_max, set_in_max, 3);
 675 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
 676         show_in_min, set_in_min, 3);
 677 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
 678 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
 679         show_temp_max_hyst, set_temp_max_hyst, 0);
 680 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
 681         show_temp_max, set_temp_max, 0);
 682 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
 683 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
 684         show_temp_max_hyst, set_temp_max_hyst, 1);
 685 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
 686         show_temp_max, set_temp_max, 1);
 687 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 688 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
 689 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
 690         show_fan_min, set_fan_min, 0);
 691 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
 692         show_fan_target, set_fan_target, 0);
 693 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 694 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
 695 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
 696         show_fan_min, set_fan_min, 1);
 697 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
 698         show_fan_target, set_fan_target, 1);
 699 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
 700         show_pwm, set_pwm, 0);
 701 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
 702         show_pwm_enable, set_pwm_enable, 0);
 703 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
 704         show_pwm_mode, set_pwm_mode, 0);
 705 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
 706         show_pwm, set_pwm, 1);
 707 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
 708         show_pwm_enable, set_pwm_enable, 1);
 709 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
 710         show_pwm_mode, set_pwm_mode, 1);
 711
 712 static struct attribute *f75375_attributes[] = {
 713         &sensor_dev_attr_temp1_input.dev_attr.attr,
 714         &sensor_dev_attr_temp1_max.dev_attr.attr,
 715         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 716         &sensor_dev_attr_temp2_input.dev_attr.attr,
 717         &sensor_dev_attr_temp2_max.dev_attr.attr,
 718         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 719         &sensor_dev_attr_fan1_input.dev_attr.attr,
 720         &sensor_dev_attr_fan1_max.dev_attr.attr,
 721         &sensor_dev_attr_fan1_min.dev_attr.attr,
 722         &sensor_dev_attr_fan1_target.dev_attr.attr,
 723         &sensor_dev_attr_fan2_input.dev_attr.attr,
 724         &sensor_dev_attr_fan2_max.dev_attr.attr,
 725         &sensor_dev_attr_fan2_min.dev_attr.attr,
 726         &sensor_dev_attr_fan2_target.dev_attr.attr,
 727         &sensor_dev_attr_pwm1.dev_attr.attr,
 728         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 729         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 730         &sensor_dev_attr_pwm2.dev_attr.attr,
 731         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 732         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 733         &sensor_dev_attr_in0_input.dev_attr.attr,
 734         &sensor_dev_attr_in0_max.dev_attr.attr,
 735         &sensor_dev_attr_in0_min.dev_attr.attr,
 736         &sensor_dev_attr_in1_input.dev_attr.attr,
 737         &sensor_dev_attr_in1_max.dev_attr.attr,
 738         &sensor_dev_attr_in1_min.dev_attr.attr,
 739         &sensor_dev_attr_in2_input.dev_attr.attr,
 740         &sensor_dev_attr_in2_max.dev_attr.attr,
 741         &sensor_dev_attr_in2_min.dev_attr.attr,
 742         &sensor_dev_attr_in3_input.dev_attr.attr,
 743         &sensor_dev_attr_in3_max.dev_attr.attr,
 744         &sensor_dev_attr_in3_min.dev_attr.attr,
 745         NULL
 746 };
 747
 748 static const struct attribute_group f75375_group = {
 749         .attrs = f75375_attributes,
 750 };
 751
 752 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
 753                 struct f75375s_platform_data *f75375s_pdata)
 754 {
 755         int nr;
 756
 757         if (!f75375s_pdata) {
 758                 u8 conf, mode;
 759                 int nr;
 760
 761                 conf = f75375_read8(client, F75375_REG_CONFIG1);
 762                 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
 763                 for (nr = 0; nr < 2; nr++) {
 764                         if (data->kind == f75387) {
 765                                 bool manu, duty;
 766
 767                                 if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
 768                                         data->pwm_mode[nr] = 1;
 769
 770                                 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
 771                                 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
 772                                 if (!manu && duty)
 773                                         /* auto, pwm */
 774                                         data->pwm_enable[nr] = 4;
 775                                 else if (manu && !duty)
 776                                         /* manual, speed */
 777                                         data->pwm_enable[nr] = 3;
 778                                 else if (!manu && !duty)
 779                                         /* automatic, speed */
 780                                         data->pwm_enable[nr] = 2;
 781                                 else
 782                                         /* manual, pwm */
 783                                         data->pwm_enable[nr] = 1;
 784                         } else {
 785                                 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
 786                                         data->pwm_mode[nr] = 1;
 787
 788                                 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
 789                                 case 0:         /* speed */
 790                                         data->pwm_enable[nr] = 3;
 791                                         break;
 792                                 case 1:         /* automatic */
 793                                         data->pwm_enable[nr] = 2;
 794                                         break;
 795                                 default:        /* manual */
 796                                         data->pwm_enable[nr] = 1;
 797                                         break;
 798                                 }
 799                         }
 800                 }
 801                 return;
 802         }
 803
 804         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
 805         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
 806         for (nr = 0; nr < 2; nr++) {
 807                 if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
 808                     !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
 809                         continue;
 810                 data->pwm[nr] = clamp_val(f75375s_pdata->pwm[nr], 0, 255);
 811                 f75375_write_pwm(client, nr);
 812         }
 813
 814 }
 815
 816 static int f75375_probe(struct i2c_client *client)
 817 {
 818         struct f75375_data *data;
 819         struct f75375s_platform_data *f75375s_pdata =
 820                         dev_get_platdata(&client->dev);
 821         int err;
 822
 823         if (!i2c_check_functionality(client->adapter,
 824                                 I2C_FUNC_SMBUS_BYTE_DATA))
 825                 return -EIO;
 826         data = devm_kzalloc(&client->dev, sizeof(struct f75375_data),
 827                             GFP_KERNEL);
 828         if (!data)
 829                 return -ENOMEM;
 830
 831         i2c_set_clientdata(client, data);
 832         mutex_init(&data->update_lock);
 833         data->kind = i2c_match_id(f75375_id, client)->driver_data;
 834
 835         err = sysfs_create_group(&client->dev.kobj, &f75375_group);
 836         if (err)
 837                 return err;
 838
 839         if (data->kind != f75373) {
 840                 err = sysfs_chmod_file(&client->dev.kobj,
 841                         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 842                         S_IRUGO | S_IWUSR);
 843                 if (err)
 844                         goto exit_remove;
 845                 err = sysfs_chmod_file(&client->dev.kobj,
 846                         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 847                         S_IRUGO | S_IWUSR);
 848                 if (err)
 849                         goto exit_remove;
 850         }
 851
 852         data->hwmon_dev = hwmon_device_register(&client->dev);
 853         if (IS_ERR(data->hwmon_dev)) {
 854                 err = PTR_ERR(data->hwmon_dev);
 855                 goto exit_remove;
 856         }
 857
 858         f75375_init(client, data, f75375s_pdata);
 859
 860         return 0;
 861
 862 exit_remove:
 863         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 864         return err;
 865 }
 866
 867 static void f75375_remove(struct i2c_client *client)
 868 {
 869         struct f75375_data *data = i2c_get_clientdata(client);
 870         hwmon_device_unregister(data->hwmon_dev);
 871         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 872 }
 873
 874 /* Return 0 if detection is successful, -ENODEV otherwise */
 875 static int f75375_detect(struct i2c_client *client,
 876                          struct i2c_board_info *info)
 877 {
 878         struct i2c_adapter *adapter = client->adapter;
 879         u16 vendid, chipid;
 880         u8 version;
 881         const char *name;
 882
 883         vendid = f75375_read16(client, F75375_REG_VENDOR);
 884         chipid = f75375_read16(client, F75375_CHIP_ID);
 885         if (vendid != 0x1934)
 886                 return -ENODEV;
 887
 888         if (chipid == 0x0306)
 889                 name = "f75375";
 890         else if (chipid == 0x0204)
 891                 name = "f75373";
 892         else if (chipid == 0x0410)
 893                 name = "f75387";
 894         else
 895                 return -ENODEV;
 896
 897         version = f75375_read8(client, F75375_REG_VERSION);
 898         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
 899         strscpy(info->type, name, I2C_NAME_SIZE);
 900
 901         return 0;
 902 }
 903
 904 module_i2c_driver(f75375_driver);
 905
 906 MODULE_AUTHOR("Riku Voipio");
 907 MODULE_LICENSE("GPL");
 908 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");