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   1 /*
   2  * f75375s.c - driver for the Fintek F75375/SP and F75373
   3  *             hardware monitoring features
   4  * Copyright (C) 2006-2007  Riku Voipio <riku.voipio@movial.fi>
   5  *
   6  * Datasheets available at:
   7  *
   8  * f75375:
   9  * http://www.fintek.com.tw/files/productfiles/2005111152950.pdf
  10  *
  11  * f75373:
  12  * http://www.fintek.com.tw/files/productfiles/2005111153128.pdf
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/jiffies.h>
  32 #include <linux/hwmon.h>
  33 #include <linux/hwmon-sysfs.h>
  34 #include <linux/i2c.h>
  35 #include <linux/err.h>
  36 #include <linux/mutex.h>
  37
  38 /* Addresses to scan */
  39 static unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
  40
  41 /* Insmod parameters */
  42 I2C_CLIENT_INSMOD_2(f75373, f75375);
  43
  44 /* Fintek F75375 registers  */
  45 #define F75375_REG_CONFIG0              0x0
  46 #define F75375_REG_CONFIG1              0x1
  47 #define F75375_REG_CONFIG2              0x2
  48 #define F75375_REG_CONFIG3              0x3
  49 #define F75375_REG_ADDR                 0x4
  50 #define F75375_REG_INTR                 0x31
  51 #define F75375_CHIP_ID                  0x5A
  52 #define F75375_REG_VERSION              0x5C
  53 #define F75375_REG_VENDOR               0x5D
  54 #define F75375_REG_FAN_TIMER            0x60
  55
  56 #define F75375_REG_VOLT(nr)             (0x10 + (nr))
  57 #define F75375_REG_VOLT_HIGH(nr)        (0x20 + (nr) * 2)
  58 #define F75375_REG_VOLT_LOW(nr)         (0x21 + (nr) * 2)
  59
  60 #define F75375_REG_TEMP(nr)             (0x14 + (nr))
  61 #define F75375_REG_TEMP_HIGH(nr)        (0x28 + (nr) * 2)
  62 #define F75375_REG_TEMP_HYST(nr)        (0x29 + (nr) * 2)
  63
  64 #define F75375_REG_FAN(nr)              (0x16 + (nr) * 2)
  65 #define F75375_REG_FAN_MIN(nr)          (0x2C + (nr) * 2)
  66 #define F75375_REG_FAN_FULL(nr)         (0x70 + (nr) * 0x10)
  67 #define F75375_REG_FAN_PWM_DUTY(nr)     (0x76 + (nr) * 0x10)
  68 #define F75375_REG_FAN_PWM_CLOCK(nr)    (0x7D + (nr) * 0x10)
  69
  70 #define F75375_REG_FAN_EXP(nr)          (0x74 + (nr) * 0x10)
  71 #define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
  72 #define F75375_REG_FAN_B_SPEED(nr, step) \
  73         ((0xA5 + (nr) * 0x10) + (step) * 2)
  74
  75 #define F75375_REG_PWM1_RAISE_DUTY      0x69
  76 #define F75375_REG_PWM2_RAISE_DUTY      0x6A
  77 #define F75375_REG_PWM1_DROP_DUTY       0x6B
  78 #define F75375_REG_PWM2_DROP_DUTY       0x6C
  79
  80 #define FAN_CTRL_LINEAR(nr)             (4 + nr)
  81 #define FAN_CTRL_MODE(nr)               (5 + ((nr) * 2))
  82
  83 /*
  84  * Data structures and manipulation thereof
  85  */
  86
  87 struct f75375_data {
  88         unsigned short addr;
  89         struct i2c_client *client;
  90         struct device *hwmon_dev;
  91
  92         const char *name;
  93         int kind;
  94         struct mutex update_lock; /* protect register access */
  95         char valid;
  96         unsigned long last_updated;     /* In jiffies */
  97         unsigned long last_limits;      /* In jiffies */
  98
  99         /* Register values */
 100         u8 in[4];
 101         u8 in_max[4];
 102         u8 in_min[4];
 103         u16 fan[2];
 104         u16 fan_min[2];
 105         u16 fan_full[2];
 106         u16 fan_exp[2];
 107         u8 fan_timer;
 108         u8 pwm[2];
 109         u8 pwm_mode[2];
 110         u8 pwm_enable[2];
 111         s8 temp[2];
 112         s8 temp_high[2];
 113         s8 temp_max_hyst[2];
 114 };
 115
 116 static int f75375_attach_adapter(struct i2c_adapter *adapter);
 117 static int f75375_detect(struct i2c_adapter *adapter, int address, int kind);
 118 static int f75375_detach_client(struct i2c_client *client);
 119 static int f75375_probe(struct i2c_client *client);
 120 static int f75375_remove(struct i2c_client *client);
 121
 122 static struct i2c_driver f75375_legacy_driver = {
 123         .driver = {
 124                 .name = "f75375_legacy",
 125         },
 126         .attach_adapter = f75375_attach_adapter,
 127         .detach_client = f75375_detach_client,
 128 };
 129
 130 static struct i2c_driver f75375_driver = {
 131         .driver = {
 132                 .name = "f75375",
 133         },
 134         .probe = f75375_probe,
 135         .remove = f75375_remove,
 136 };
 137
 138 static inline int f75375_read8(struct i2c_client *client, u8 reg)
 139 {
 140         return i2c_smbus_read_byte_data(client, reg);
 141 }
 142
 143 /* in most cases, should be called while holding update_lock */
 144 static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
 145 {
 146         return ((i2c_smbus_read_byte_data(client, reg) << 8)
 147                 | i2c_smbus_read_byte_data(client, reg + 1));
 148 }
 149
 150 static inline void f75375_write8(struct i2c_client *client, u8 reg,
 151                 u8 value)
 152 {
 153         i2c_smbus_write_byte_data(client, reg, value);
 154 }
 155
 156 static inline void f75375_write16(struct i2c_client *client, u8 reg,
 157                 u16 value)
 158 {
 159         int err = i2c_smbus_write_byte_data(client, reg, (value << 8));
 160         if (err)
 161                 return;
 162         i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
 163 }
 164
 165 static struct f75375_data *f75375_update_device(struct device *dev)
 166 {
 167         struct i2c_client *client = to_i2c_client(dev);
 168         struct f75375_data *data = i2c_get_clientdata(client);
 169         int nr;
 170
 171         mutex_lock(&data->update_lock);
 172
 173         /* Limit registers cache is refreshed after 60 seconds */
 174         if (time_after(jiffies, data->last_limits + 60 * HZ)
 175                 || !data->valid) {
 176                 for (nr = 0; nr < 2; nr++) {
 177                         data->temp_high[nr] =
 178                                 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
 179                         data->temp_max_hyst[nr] =
 180                                 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
 181                         data->fan_full[nr] =
 182                                 f75375_read16(client, F75375_REG_FAN_FULL(nr));
 183                         data->fan_min[nr] =
 184                                 f75375_read16(client, F75375_REG_FAN_MIN(nr));
 185                         data->fan_exp[nr] =
 186                                 f75375_read16(client, F75375_REG_FAN_EXP(nr));
 187                         data->pwm[nr] = f75375_read8(client,
 188                                 F75375_REG_FAN_PWM_DUTY(nr));
 189
 190                 }
 191                 for (nr = 0; nr < 4; nr++) {
 192                         data->in_max[nr] =
 193                                 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
 194                         data->in_min[nr] =
 195                                 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
 196                 }
 197                 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
 198                 data->last_limits = jiffies;
 199         }
 200
 201         /* Measurement registers cache is refreshed after 2 second */
 202         if (time_after(jiffies, data->last_updated + 2 * HZ)
 203                 || !data->valid) {
 204                 for (nr = 0; nr < 2; nr++) {
 205                         data->temp[nr] =
 206                                 f75375_read8(client, F75375_REG_TEMP(nr));
 207                         data->fan[nr] =
 208                                 f75375_read16(client, F75375_REG_FAN(nr));
 209                 }
 210                 for (nr = 0; nr < 4; nr++)
 211                         data->in[nr] =
 212                                 f75375_read8(client, F75375_REG_VOLT(nr));
 213
 214                 data->last_updated = jiffies;
 215                 data->valid = 1;
 216         }
 217
 218         mutex_unlock(&data->update_lock);
 219         return data;
 220 }
 221
 222 static inline u16 rpm_from_reg(u16 reg)
 223 {
 224         if (reg == 0 || reg == 0xffff)
 225                 return 0;
 226         return (1500000 / reg);
 227 }
 228
 229 static inline u16 rpm_to_reg(int rpm)
 230 {
 231         if (rpm < 367 || rpm > 0xffff)
 232                 return 0xffff;
 233         return (1500000 / rpm);
 234 }
 235
 236 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 237                 const char *buf, size_t count)
 238 {
 239         int nr = to_sensor_dev_attr(attr)->index;
 240         struct i2c_client *client = to_i2c_client(dev);
 241         struct f75375_data *data = i2c_get_clientdata(client);
 242         int val = simple_strtoul(buf, NULL, 10);
 243
 244         mutex_lock(&data->update_lock);
 245         data->fan_min[nr] = rpm_to_reg(val);
 246         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
 247         mutex_unlock(&data->update_lock);
 248         return count;
 249 }
 250
 251 static ssize_t set_fan_exp(struct device *dev, struct device_attribute *attr,
 252                 const char *buf, size_t count)
 253 {
 254         int nr = to_sensor_dev_attr(attr)->index;
 255         struct i2c_client *client = to_i2c_client(dev);
 256         struct f75375_data *data = i2c_get_clientdata(client);
 257         int val = simple_strtoul(buf, NULL, 10);
 258
 259         mutex_lock(&data->update_lock);
 260         data->fan_exp[nr] = rpm_to_reg(val);
 261         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_exp[nr]);
 262         mutex_unlock(&data->update_lock);
 263         return count;
 264 }
 265
 266 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 267                 const char *buf, size_t count)
 268 {
 269         int nr = to_sensor_dev_attr(attr)->index;
 270         struct i2c_client *client = to_i2c_client(dev);
 271         struct f75375_data *data = i2c_get_clientdata(client);
 272         int val = simple_strtoul(buf, NULL, 10);
 273
 274         mutex_lock(&data->update_lock);
 275         data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
 276         f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr), data->pwm[nr]);
 277         mutex_unlock(&data->update_lock);
 278         return count;
 279 }
 280
 281 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 282                 *attr, char *buf)
 283 {
 284         int nr = to_sensor_dev_attr(attr)->index;
 285         struct f75375_data *data = f75375_update_device(dev);
 286         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
 287 }
 288
 289 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
 290                 const char *buf, size_t count)
 291 {
 292         int nr = to_sensor_dev_attr(attr)->index;
 293         struct i2c_client *client = to_i2c_client(dev);
 294         struct f75375_data *data = i2c_get_clientdata(client);
 295         int val = simple_strtoul(buf, NULL, 10);
 296         u8 fanmode;
 297
 298         if (val < 0 || val > 4)
 299                 return -EINVAL;
 300
 301         mutex_lock(&data->update_lock);
 302         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
 303         fanmode = ~(3 << FAN_CTRL_MODE(nr));
 304
 305         switch (val) {
 306         case 0: /* Full speed */
 307                 fanmode  |= (3 << FAN_CTRL_MODE(nr));
 308                 data->pwm[nr] = 255;
 309                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 310                                 data->pwm[nr]);
 311                 break;
 312         case 1: /* PWM */
 313                 fanmode  |= (3 << FAN_CTRL_MODE(nr));
 314                 break;
 315         case 2: /* AUTOMATIC*/
 316                 fanmode  |= (2 << FAN_CTRL_MODE(nr));
 317                 break;
 318         case 3: /* fan speed */
 319                 break;
 320         }
 321         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
 322         data->pwm_enable[nr] = val;
 323         mutex_unlock(&data->update_lock);
 324         return count;
 325 }
 326
 327 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 328                 const char *buf, size_t count)
 329 {
 330         int nr = to_sensor_dev_attr(attr)->index;
 331         struct i2c_client *client = to_i2c_client(dev);
 332         struct f75375_data *data = i2c_get_clientdata(client);
 333         int val = simple_strtoul(buf, NULL, 10);
 334         u8 conf = 0;
 335
 336         if (!(val == 0 || val == 1) || data->kind == f75373)
 337                 return -EINVAL;
 338
 339         mutex_lock(&data->update_lock);
 340         conf = f75375_read8(client, F75375_REG_CONFIG1);
 341         conf = ~(1 << FAN_CTRL_LINEAR(nr));
 342
 343         if (val == 0)
 344                 conf |= (1 << FAN_CTRL_LINEAR(nr)) ;
 345
 346         f75375_write8(client, F75375_REG_CONFIG1, conf);
 347         data->pwm_mode[nr] = val;
 348         mutex_unlock(&data->update_lock);
 349         return count;
 350 }
 351
 352 static ssize_t show_pwm(struct device *dev, struct device_attribute
 353                 *attr, char *buf)
 354 {
 355         int nr = to_sensor_dev_attr(attr)->index;
 356         struct f75375_data *data = f75375_update_device(dev);
 357         return sprintf(buf, "%d\n", data->pwm[nr]);
 358 }
 359
 360 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
 361                 *attr, char *buf)
 362 {
 363         int nr = to_sensor_dev_attr(attr)->index;
 364         struct f75375_data *data = f75375_update_device(dev);
 365         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
 366 }
 367
 368 #define VOLT_FROM_REG(val) ((val) * 8)
 369 #define VOLT_TO_REG(val) ((val) / 8)
 370
 371 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 372                 char *buf)
 373 {
 374         int nr = to_sensor_dev_attr(attr)->index;
 375         struct f75375_data *data = f75375_update_device(dev);
 376         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
 377 }
 378
 379 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 380                 char *buf)
 381 {
 382         int nr = to_sensor_dev_attr(attr)->index;
 383         struct f75375_data *data = f75375_update_device(dev);
 384         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
 385 }
 386
 387 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 388                 char *buf)
 389 {
 390         int nr = to_sensor_dev_attr(attr)->index;
 391         struct f75375_data *data = f75375_update_device(dev);
 392         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
 393 }
 394
 395 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 396                 const char *buf, size_t count)
 397 {
 398         int nr = to_sensor_dev_attr(attr)->index;
 399         struct i2c_client *client = to_i2c_client(dev);
 400         struct f75375_data *data = i2c_get_clientdata(client);
 401         int val = simple_strtoul(buf, NULL, 10);
 402         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 403         mutex_lock(&data->update_lock);
 404         data->in_max[nr] = val;
 405         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
 406         mutex_unlock(&data->update_lock);
 407         return count;
 408 }
 409
 410 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 411                 const char *buf, size_t count)
 412 {
 413         int nr = to_sensor_dev_attr(attr)->index;
 414         struct i2c_client *client = to_i2c_client(dev);
 415         struct f75375_data *data = i2c_get_clientdata(client);
 416         int val = simple_strtoul(buf, NULL, 10);
 417         val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
 418         mutex_lock(&data->update_lock);
 419         data->in_min[nr] = val;
 420         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
 421         mutex_unlock(&data->update_lock);
 422         return count;
 423 }
 424 #define TEMP_FROM_REG(val) ((val) * 1000)
 425 #define TEMP_TO_REG(val) ((val) / 1000)
 426
 427 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 428                 char *buf)
 429 {
 430         int nr = to_sensor_dev_attr(attr)->index;
 431         struct f75375_data *data = f75375_update_device(dev);
 432         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 433 }
 434
 435 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 436                 char *buf)
 437 {
 438         int nr = to_sensor_dev_attr(attr)->index;
 439         struct f75375_data *data = f75375_update_device(dev);
 440         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 441 }
 442
 443 static ssize_t show_temp_max_hyst(struct device *dev,
 444                 struct device_attribute *attr, char *buf)
 445 {
 446         int nr = to_sensor_dev_attr(attr)->index;
 447         struct f75375_data *data = f75375_update_device(dev);
 448         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
 449 }
 450
 451 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 452                 const char *buf, size_t count)
 453 {
 454         int nr = to_sensor_dev_attr(attr)->index;
 455         struct i2c_client *client = to_i2c_client(dev);
 456         struct f75375_data *data = i2c_get_clientdata(client);
 457         int val = simple_strtol(buf, NULL, 10);
 458         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 459         mutex_lock(&data->update_lock);
 460         data->temp_high[nr] = val;
 461         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 462         mutex_unlock(&data->update_lock);
 463         return count;
 464 }
 465
 466 static ssize_t set_temp_max_hyst(struct device *dev,
 467         struct device_attribute *attr, const char *buf, size_t count)
 468 {
 469         int nr = to_sensor_dev_attr(attr)->index;
 470         struct i2c_client *client = to_i2c_client(dev);
 471         struct f75375_data *data = i2c_get_clientdata(client);
 472         int val = simple_strtol(buf, NULL, 10);
 473         val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
 474         mutex_lock(&data->update_lock);
 475         data->temp_max_hyst[nr] = val;
 476         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
 477                 data->temp_max_hyst[nr]);
 478         mutex_unlock(&data->update_lock);
 479         return count;
 480 }
 481
 482 #define show_fan(thing) \
 483 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
 484                         char *buf)\
 485 {\
 486         int nr = to_sensor_dev_attr(attr)->index;\
 487         struct f75375_data *data = f75375_update_device(dev); \
 488         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
 489 }
 490
 491 show_fan(fan);
 492 show_fan(fan_min);
 493 show_fan(fan_full);
 494 show_fan(fan_exp);
 495
 496 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 497 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
 498         show_in_max, set_in_max, 0);
 499 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
 500         show_in_min, set_in_min, 0);
 501 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 502 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
 503         show_in_max, set_in_max, 1);
 504 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
 505         show_in_min, set_in_min, 1);
 506 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 507 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
 508         show_in_max, set_in_max, 2);
 509 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
 510         show_in_min, set_in_min, 2);
 511 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 512 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
 513         show_in_max, set_in_max, 3);
 514 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
 515         show_in_min, set_in_min, 3);
 516 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
 517 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
 518         show_temp_max_hyst, set_temp_max_hyst, 0);
 519 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
 520         show_temp_max, set_temp_max, 0);
 521 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
 522 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
 523         show_temp_max_hyst, set_temp_max_hyst, 1);
 524 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
 525         show_temp_max, set_temp_max, 1);
 526 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 527 static SENSOR_DEVICE_ATTR(fan1_full, S_IRUGO, show_fan_full, NULL, 0);
 528 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
 529         show_fan_min, set_fan_min, 0);
 530 static SENSOR_DEVICE_ATTR(fan1_exp, S_IRUGO|S_IWUSR,
 531         show_fan_exp, set_fan_exp, 0);
 532 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 533 static SENSOR_DEVICE_ATTR(fan2_full, S_IRUGO, show_fan_full, NULL, 1);
 534 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
 535         show_fan_min, set_fan_min, 1);
 536 static SENSOR_DEVICE_ATTR(fan2_exp, S_IRUGO|S_IWUSR,
 537         show_fan_exp, set_fan_exp, 1);
 538 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
 539         show_pwm, set_pwm, 0);
 540 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
 541         show_pwm_enable, set_pwm_enable, 0);
 542 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO|S_IWUSR,
 543         show_pwm_mode, set_pwm_mode, 0);
 544 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
 545         show_pwm, set_pwm, 1);
 546 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
 547         show_pwm_enable, set_pwm_enable, 1);
 548 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO|S_IWUSR,
 549         show_pwm_mode, set_pwm_mode, 1);
 550
 551 static struct attribute *f75375_attributes[] = {
 552         &sensor_dev_attr_temp1_input.dev_attr.attr,
 553         &sensor_dev_attr_temp1_max.dev_attr.attr,
 554         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 555         &sensor_dev_attr_temp2_input.dev_attr.attr,
 556         &sensor_dev_attr_temp2_max.dev_attr.attr,
 557         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 558         &sensor_dev_attr_fan1_input.dev_attr.attr,
 559         &sensor_dev_attr_fan1_full.dev_attr.attr,
 560         &sensor_dev_attr_fan1_min.dev_attr.attr,
 561         &sensor_dev_attr_fan1_exp.dev_attr.attr,
 562         &sensor_dev_attr_fan2_input.dev_attr.attr,
 563         &sensor_dev_attr_fan2_full.dev_attr.attr,
 564         &sensor_dev_attr_fan2_min.dev_attr.attr,
 565         &sensor_dev_attr_fan2_exp.dev_attr.attr,
 566         &sensor_dev_attr_pwm1.dev_attr.attr,
 567         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 568         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 569         &sensor_dev_attr_pwm2.dev_attr.attr,
 570         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 571         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 572         &sensor_dev_attr_in0_input.dev_attr.attr,
 573         &sensor_dev_attr_in0_max.dev_attr.attr,
 574         &sensor_dev_attr_in0_min.dev_attr.attr,
 575         &sensor_dev_attr_in1_input.dev_attr.attr,
 576         &sensor_dev_attr_in1_max.dev_attr.attr,
 577         &sensor_dev_attr_in1_min.dev_attr.attr,
 578         &sensor_dev_attr_in2_input.dev_attr.attr,
 579         &sensor_dev_attr_in2_max.dev_attr.attr,
 580         &sensor_dev_attr_in2_min.dev_attr.attr,
 581         &sensor_dev_attr_in3_input.dev_attr.attr,
 582         &sensor_dev_attr_in3_max.dev_attr.attr,
 583         &sensor_dev_attr_in3_min.dev_attr.attr,
 584         NULL
 585 };
 586
 587 static const struct attribute_group f75375_group = {
 588         .attrs = f75375_attributes,
 589 };
 590
 591 static int f75375_detach_client(struct i2c_client *client)
 592 {
 593         int err;
 594
 595         f75375_remove(client);
 596         err = i2c_detach_client(client);
 597         if (err) {
 598                 dev_err(&client->dev,
 599                         "Client deregistration failed, "
 600                         "client not detached.\n");
 601                 return err;
 602         }
 603         kfree(client);
 604         return 0;
 605 }
 606
 607 static int f75375_probe(struct i2c_client *client)
 608 {
 609         struct f75375_data *data = i2c_get_clientdata(client);
 610         int err;
 611
 612         if (!i2c_check_functionality(client->adapter,
 613                                 I2C_FUNC_SMBUS_BYTE_DATA))
 614                 return -EIO;
 615         if (!(data = kzalloc(sizeof(struct f75375_data), GFP_KERNEL)))
 616                 return -ENOMEM;
 617
 618         i2c_set_clientdata(client, data);
 619         data->client = client;
 620         mutex_init(&data->update_lock);
 621
 622         if (strcmp(client->name, "f75375") == 0)
 623                 data->kind = f75375;
 624         else if (strcmp(client->name, "f75373") == 0)
 625                 data->kind = f75373;
 626         else {
 627                 dev_err(&client->dev, "Unsupported device: %s\n", client->name);
 628                 return -ENODEV;
 629         }
 630
 631         if ((err = sysfs_create_group(&client->dev.kobj, &f75375_group)))
 632                 goto exit_free;
 633
 634         data->hwmon_dev = hwmon_device_register(&client->dev);
 635         if (IS_ERR(data->hwmon_dev)) {
 636                 err = PTR_ERR(data->hwmon_dev);
 637                 goto exit_remove;
 638         }
 639
 640         return 0;
 641
 642 exit_remove:
 643         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 644 exit_free:
 645         kfree(data);
 646         i2c_set_clientdata(client, NULL);
 647         return err;
 648 }
 649
 650 static int f75375_remove(struct i2c_client *client)
 651 {
 652         struct f75375_data *data = i2c_get_clientdata(client);
 653         hwmon_device_unregister(data->hwmon_dev);
 654         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 655         kfree(data);
 656         i2c_set_clientdata(client, NULL);
 657         return 0;
 658 }
 659
 660 static int f75375_attach_adapter(struct i2c_adapter *adapter)
 661 {
 662         if (!(adapter->class & I2C_CLASS_HWMON))
 663                 return 0;
 664         return i2c_probe(adapter, &addr_data, f75375_detect);
 665 }
 666
 667 /* This function is called by i2c_probe */
 668 static int f75375_detect(struct i2c_adapter *adapter, int address, int kind)
 669 {
 670         struct i2c_client *client;
 671         u8 version = 0;
 672         int err = 0;
 673         const char *name = "";
 674
 675         if (!(client = kzalloc(sizeof(*client), GFP_KERNEL))) {
 676                 err = -ENOMEM;
 677                 goto exit;
 678         }
 679         client->addr = address;
 680         client->adapter = adapter;
 681         client->driver = &f75375_legacy_driver;
 682
 683         if (kind < 0) {
 684                 u16 vendid = f75375_read16(client, F75375_REG_VENDOR);
 685                 u16 chipid = f75375_read16(client, F75375_CHIP_ID);
 686                 version = f75375_read8(client, F75375_REG_VERSION);
 687                 if (chipid == 0x0306 && vendid == 0x1934) {
 688                         kind = f75375;
 689                 } else if (chipid == 0x0204 && vendid == 0x1934) {
 690                         kind = f75373;
 691                 } else {
 692                         dev_err(&adapter->dev,
 693                                 "failed,%02X,%02X,%02X\n",
 694                                 chipid, version, vendid);
 695                         goto exit_free;
 696                 }
 697         }
 698
 699         if (kind == f75375) {
 700                 name = "f75375";
 701         } else if (kind == f75373) {
 702                 name = "f75373";
 703         }
 704         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
 705         strlcpy(client->name, name, I2C_NAME_SIZE);
 706
 707         if ((err = i2c_attach_client(client)))
 708                 goto exit_free;
 709
 710         if ((err = f75375_probe(client)) < 0)
 711                 goto exit_detach;
 712
 713         return 0;
 714
 715 exit_detach:
 716         i2c_detach_client(client);
 717 exit_free:
 718         kfree(client);
 719 exit:
 720         return err;
 721 }
 722
 723 static int __init sensors_f75375_init(void)
 724 {
 725         int status;
 726         status = i2c_add_driver(&f75375_driver);
 727         if (status)
 728                 return status;
 729
 730         status = i2c_add_driver(&f75375_legacy_driver);
 731         if (status)
 732                 i2c_del_driver(&f75375_driver);
 733
 734         return status;
 735 }
 736
 737 static void __exit sensors_f75375_exit(void)
 738 {
 739         i2c_del_driver(&f75375_legacy_driver);
 740         i2c_del_driver(&f75375_driver);
 741 }
 742
 743 MODULE_AUTHOR("Riku Voipio <riku.voipio@movial.fi>");
 744 MODULE_LICENSE("GPL");
 745 MODULE_DESCRIPTION("F75373/F75375 hardware monitoring driver");
 746
 747 module_init(sensors_f75375_init);
 748 module_exit(sensors_f75375_exit);