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   1 /*
   2   adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
   3   monitoring
   4   Based on lm75.c and lm85.c
   5   Supports adm1030 / adm1031
   6   Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
   7   Reworked by Jean Delvare <khali@linux-fr.org>
   8
   9   This program is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   This program is distributed in the hope that it will be useful,
  15   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17   GNU General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with this program; if not, write to the Free Software
  21   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/slab.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/i2c.h>
  29 #include <linux/i2c-sensor.h>
  30
  31 /* Following macros takes channel parameter starting from 0 to 2 */
  32 #define ADM1031_REG_FAN_SPEED(nr)       (0x08 + (nr))
  33 #define ADM1031_REG_FAN_DIV(nr)         (0x20  + (nr))
  34 #define ADM1031_REG_PWM                 (0x22)
  35 #define ADM1031_REG_FAN_MIN(nr)         (0x10 + (nr))
  36
  37 #define ADM1031_REG_TEMP_MAX(nr)        (0x14  + 4*(nr))
  38 #define ADM1031_REG_TEMP_MIN(nr)        (0x15  + 4*(nr))
  39 #define ADM1031_REG_TEMP_CRIT(nr)       (0x16  + 4*(nr))
  40
  41 #define ADM1031_REG_TEMP(nr)            (0xa + (nr))
  42 #define ADM1031_REG_AUTO_TEMP(nr)       (0x24 + (nr))
  43
  44 #define ADM1031_REG_STATUS(nr)          (0x2 + (nr))
  45
  46 #define ADM1031_REG_CONF1               0x0
  47 #define ADM1031_REG_CONF2               0x1
  48 #define ADM1031_REG_EXT_TEMP            0x6
  49
  50 #define ADM1031_CONF1_MONITOR_ENABLE    0x01    /* Monitoring enable */
  51 #define ADM1031_CONF1_PWM_INVERT        0x08    /* PWM Invert */
  52 #define ADM1031_CONF1_AUTO_MODE         0x80    /* Auto FAN */
  53
  54 #define ADM1031_CONF2_PWM1_ENABLE       0x01
  55 #define ADM1031_CONF2_PWM2_ENABLE       0x02
  56 #define ADM1031_CONF2_TACH1_ENABLE      0x04
  57 #define ADM1031_CONF2_TACH2_ENABLE      0x08
  58 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
  59
  60 /* Addresses to scan */
  61 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  62 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  63
  64 /* Insmod parameters */
  65 SENSORS_INSMOD_2(adm1030, adm1031);
  66
  67 typedef u8 auto_chan_table_t[8][2];
  68
  69 /* Each client has this additional data */
  70 struct adm1031_data {
  71         struct i2c_client client;
  72         struct semaphore update_lock;
  73         int chip_type;
  74         char valid;             /* !=0 if following fields are valid */
  75         unsigned long last_updated;     /* In jiffies */
  76         /* The chan_select_table contains the possible configurations for
  77          * auto fan control.
  78          */
  79         auto_chan_table_t *chan_select_table;
  80         u16 alarm;
  81         u8 conf1;
  82         u8 conf2;
  83         u8 fan[2];
  84         u8 fan_div[2];
  85         u8 fan_min[2];
  86         u8 pwm[2];
  87         u8 old_pwm[2];
  88         s8 temp[3];
  89         u8 ext_temp[3];
  90         u8 auto_temp[3];
  91         u8 auto_temp_min[3];
  92         u8 auto_temp_off[3];
  93         u8 auto_temp_max[3];
  94         s8 temp_min[3];
  95         s8 temp_max[3];
  96         s8 temp_crit[3];
  97 };
  98
  99 static int adm1031_attach_adapter(struct i2c_adapter *adapter);
 100 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind);
 101 static void adm1031_init_client(struct i2c_client *client);
 102 static int adm1031_detach_client(struct i2c_client *client);
 103 static struct adm1031_data *adm1031_update_device(struct device *dev);
 104
 105 /* This is the driver that will be inserted */
 106 static struct i2c_driver adm1031_driver = {
 107         .owner = THIS_MODULE,
 108         .name = "adm1031",
 109         .flags = I2C_DF_NOTIFY,
 110         .attach_adapter = adm1031_attach_adapter,
 111         .detach_client = adm1031_detach_client,
 112 };
 113
 114 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
 115 {
 116         return i2c_smbus_read_byte_data(client, reg);
 117 }
 118
 119 static inline int
 120 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
 121 {
 122         return i2c_smbus_write_byte_data(client, reg, value);
 123 }
 124
 125
 126 #define TEMP_TO_REG(val)                (((val) < 0 ? ((val - 500) / 1000) : \
 127                                         ((val + 500) / 1000)))
 128
 129 #define TEMP_FROM_REG(val)              ((val) * 1000)
 130
 131 #define TEMP_FROM_REG_EXT(val, ext)     (TEMP_FROM_REG(val) + (ext) * 125)
 132
 133 #define FAN_FROM_REG(reg, div)          ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
 134
 135 static int FAN_TO_REG(int reg, int div)
 136 {
 137         int tmp;
 138         tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
 139         return tmp > 255 ? 255 : tmp;
 140 }
 141
 142 #define FAN_DIV_FROM_REG(reg)           (1<<(((reg)&0xc0)>>6))
 143
 144 #define PWM_TO_REG(val)                 (SENSORS_LIMIT((val), 0, 255) >> 4)
 145 #define PWM_FROM_REG(val)               ((val) << 4)
 146
 147 #define FAN_CHAN_FROM_REG(reg)          (((reg) >> 5) & 7)
 148 #define FAN_CHAN_TO_REG(val, reg)       \
 149         (((reg) & 0x1F) | (((val) << 5) & 0xe0))
 150
 151 #define AUTO_TEMP_MIN_TO_REG(val, reg)  \
 152         ((((val)/500) & 0xf8)|((reg) & 0x7))
 153 #define AUTO_TEMP_RANGE_FROM_REG(reg)   (5000 * (1<< ((reg)&0x7)))
 154 #define AUTO_TEMP_MIN_FROM_REG(reg)     (1000 * ((((reg) >> 3) & 0x1f) << 2))
 155
 156 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
 157
 158 #define AUTO_TEMP_OFF_FROM_REG(reg)             \
 159         (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
 160
 161 #define AUTO_TEMP_MAX_FROM_REG(reg)             \
 162         (AUTO_TEMP_RANGE_FROM_REG(reg) +        \
 163         AUTO_TEMP_MIN_FROM_REG(reg))
 164
 165 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
 166 {
 167         int ret;
 168         int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
 169
 170         range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
 171         ret = ((reg & 0xf8) |
 172                (range < 10000 ? 0 :
 173                 range < 20000 ? 1 :
 174                 range < 40000 ? 2 : range < 80000 ? 3 : 4));
 175         return ret;
 176 }
 177
 178 /* FAN auto control */
 179 #define GET_FAN_AUTO_BITFIELD(data, idx)        \
 180         (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
 181
 182 /* The tables below contains the possible values for the auto fan
 183  * control bitfields. the index in the table is the register value.
 184  * MSb is the auto fan control enable bit, so the four first entries
 185  * in the table disables auto fan control when both bitfields are zero.
 186  */
 187 static auto_chan_table_t auto_channel_select_table_adm1031 = {
 188         {0, 0}, {0, 0}, {0, 0}, {0, 0},
 189         {2 /*0b010 */ , 4 /*0b100 */ },
 190         {2 /*0b010 */ , 2 /*0b010 */ },
 191         {4 /*0b100 */ , 4 /*0b100 */ },
 192         {7 /*0b111 */ , 7 /*0b111 */ },
 193 };
 194
 195 static auto_chan_table_t auto_channel_select_table_adm1030 = {
 196         {0, 0}, {0, 0}, {0, 0}, {0, 0},
 197         {2 /*0b10 */            , 0},
 198         {0xff /*invalid */      , 0},
 199         {0xff /*invalid */      , 0},
 200         {3 /*0b11 */            , 0},
 201 };
 202
 203 /* That function checks if a bitfield is valid and returns the other bitfield
 204  * nearest match if no exact match where found.
 205  */
 206 static int
 207 get_fan_auto_nearest(struct adm1031_data *data,
 208                      int chan, u8 val, u8 reg, u8 * new_reg)
 209 {
 210         int i;
 211         int first_match = -1, exact_match = -1;
 212         u8 other_reg_val =
 213             (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
 214
 215         if (val == 0) {
 216                 *new_reg = 0;
 217                 return 0;
 218         }
 219
 220         for (i = 0; i < 8; i++) {
 221                 if ((val == (*data->chan_select_table)[i][chan]) &&
 222                     ((*data->chan_select_table)[i][chan ? 0 : 1] ==
 223                      other_reg_val)) {
 224                         /* We found an exact match */
 225                         exact_match = i;
 226                         break;
 227                 } else if (val == (*data->chan_select_table)[i][chan] &&
 228                            first_match == -1) {
 229                         /* Save the first match in case of an exact match has not been
 230                          * found
 231                          */
 232                         first_match = i;
 233                 }
 234         }
 235
 236         if (exact_match >= 0) {
 237                 *new_reg = exact_match;
 238         } else if (first_match >= 0) {
 239                 *new_reg = first_match;
 240         } else {
 241                 return -EINVAL;
 242         }
 243         return 0;
 244 }
 245
 246 static ssize_t show_fan_auto_channel(struct device *dev, char *buf, int nr)
 247 {
 248         struct adm1031_data *data = adm1031_update_device(dev);
 249         return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
 250 }
 251
 252 static ssize_t
 253 set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
 254 {
 255         struct i2c_client *client = to_i2c_client(dev);
 256         struct adm1031_data *data = i2c_get_clientdata(client);
 257         int val = simple_strtol(buf, NULL, 10);
 258         u8 reg;
 259         int ret;
 260         u8 old_fan_mode;
 261
 262         old_fan_mode = data->conf1;
 263
 264         down(&data->update_lock);
 265
 266         if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
 267                 up(&data->update_lock);
 268                 return ret;
 269         }
 270         if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^
 271             (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
 272                 if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
 273                         /* Switch to Auto Fan Mode
 274                          * Save PWM registers
 275                          * Set PWM registers to 33% Both */
 276                         data->old_pwm[0] = data->pwm[0];
 277                         data->old_pwm[1] = data->pwm[1];
 278                         adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
 279                 } else {
 280                         /* Switch to Manual Mode */
 281                         data->pwm[0] = data->old_pwm[0];
 282                         data->pwm[1] = data->old_pwm[1];
 283                         /* Restore PWM registers */
 284                         adm1031_write_value(client, ADM1031_REG_PWM,
 285                                             data->pwm[0] | (data->pwm[1] << 4));
 286                 }
 287         }
 288         data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
 289         adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
 290         up(&data->update_lock);
 291         return count;
 292 }
 293
 294 #define fan_auto_channel_offset(offset)                                         \
 295 static ssize_t show_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr, char *buf)    \
 296 {                                                                               \
 297         return show_fan_auto_channel(dev, buf, offset - 1);                     \
 298 }                                                                               \
 299 static ssize_t set_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr,                \
 300         const char *buf, size_t count)                                          \
 301 {                                                                               \
 302         return set_fan_auto_channel(dev, buf, count, offset - 1);               \
 303 }                                                                               \
 304 static DEVICE_ATTR(auto_fan##offset##_channel, S_IRUGO | S_IWUSR,               \
 305                    show_fan_auto_channel_##offset,                              \
 306                    set_fan_auto_channel_##offset)
 307
 308 fan_auto_channel_offset(1);
 309 fan_auto_channel_offset(2);
 310
 311 /* Auto Temps */
 312 static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
 313 {
 314         struct adm1031_data *data = adm1031_update_device(dev);
 315         return sprintf(buf, "%d\n",
 316                        AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
 317 }
 318 static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
 319 {
 320         struct adm1031_data *data = adm1031_update_device(dev);
 321         return sprintf(buf, "%d\n",
 322                        AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
 323 }
 324 static ssize_t
 325 set_auto_temp_min(struct device *dev, const char *buf, size_t count, int nr)
 326 {
 327         struct i2c_client *client = to_i2c_client(dev);
 328         struct adm1031_data *data = i2c_get_clientdata(client);
 329         int val = simple_strtol(buf, NULL, 10);
 330
 331         down(&data->update_lock);
 332         data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
 333         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
 334                             data->auto_temp[nr]);
 335         up(&data->update_lock);
 336         return count;
 337 }
 338 static ssize_t show_auto_temp_max(struct device *dev, char *buf, int nr)
 339 {
 340         struct adm1031_data *data = adm1031_update_device(dev);
 341         return sprintf(buf, "%d\n",
 342                        AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
 343 }
 344 static ssize_t
 345 set_auto_temp_max(struct device *dev, const char *buf, size_t count, int nr)
 346 {
 347         struct i2c_client *client = to_i2c_client(dev);
 348         struct adm1031_data *data = i2c_get_clientdata(client);
 349         int val = simple_strtol(buf, NULL, 10);
 350
 351         down(&data->update_lock);
 352         data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
 353         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
 354                             data->temp_max[nr]);
 355         up(&data->update_lock);
 356         return count;
 357 }
 358
 359 #define auto_temp_reg(offset)                                                   \
 360 static ssize_t show_auto_temp_##offset##_off (struct device *dev, struct device_attribute *attr, char *buf)     \
 361 {                                                                               \
 362         return show_auto_temp_off(dev, buf, offset - 1);                        \
 363 }                                                                               \
 364 static ssize_t show_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)     \
 365 {                                                                               \
 366         return show_auto_temp_min(dev, buf, offset - 1);                        \
 367 }                                                                               \
 368 static ssize_t show_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)     \
 369 {                                                                               \
 370         return show_auto_temp_max(dev, buf, offset - 1);                        \
 371 }                                                                               \
 372 static ssize_t set_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr,         \
 373                                              const char *buf, size_t count)     \
 374 {                                                                               \
 375         return set_auto_temp_min(dev, buf, count, offset - 1);          \
 376 }                                                                               \
 377 static ssize_t set_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr,         \
 378                                              const char *buf, size_t count)     \
 379 {                                                                               \
 380         return set_auto_temp_max(dev, buf, count, offset - 1);          \
 381 }                                                                               \
 382 static DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO,                            \
 383                    show_auto_temp_##offset##_off, NULL);                        \
 384 static DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR,                  \
 385                    show_auto_temp_##offset##_min, set_auto_temp_##offset##_min);\
 386 static DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR,                  \
 387                    show_auto_temp_##offset##_max, set_auto_temp_##offset##_max)
 388
 389 auto_temp_reg(1);
 390 auto_temp_reg(2);
 391 auto_temp_reg(3);
 392
 393 /* pwm */
 394 static ssize_t show_pwm(struct device *dev, char *buf, int nr)
 395 {
 396         struct adm1031_data *data = adm1031_update_device(dev);
 397         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
 398 }
 399 static ssize_t
 400 set_pwm(struct device *dev, const char *buf, size_t count, int nr)
 401 {
 402         struct i2c_client *client = to_i2c_client(dev);
 403         struct adm1031_data *data = i2c_get_clientdata(client);
 404         int val = simple_strtol(buf, NULL, 10);
 405         int reg;
 406
 407         down(&data->update_lock);
 408         if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
 409             (((val>>4) & 0xf) != 5)) {
 410                 /* In automatic mode, the only PWM accepted is 33% */
 411                 up(&data->update_lock);
 412                 return -EINVAL;
 413         }
 414         data->pwm[nr] = PWM_TO_REG(val);
 415         reg = adm1031_read_value(client, ADM1031_REG_PWM);
 416         adm1031_write_value(client, ADM1031_REG_PWM,
 417                             nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
 418                             : (data->pwm[nr] & 0xf) | (reg & 0xf0));
 419         up(&data->update_lock);
 420         return count;
 421 }
 422
 423 #define pwm_reg(offset)                                                 \
 424 static ssize_t show_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 425 {                                                                       \
 426         return show_pwm(dev, buf, offset - 1);                  \
 427 }                                                                       \
 428 static ssize_t set_pwm_##offset (struct device *dev, struct device_attribute *attr,                     \
 429                                  const char *buf, size_t count)         \
 430 {                                                                       \
 431         return set_pwm(dev, buf, count, offset - 1);            \
 432 }                                                                       \
 433 static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,                      \
 434                    show_pwm_##offset, set_pwm_##offset)
 435
 436 pwm_reg(1);
 437 pwm_reg(2);
 438
 439 /* Fans */
 440
 441 /*
 442  * That function checks the cases where the fan reading is not
 443  * relevant.  It is used to provide 0 as fan reading when the fan is
 444  * not supposed to run
 445  */
 446 static int trust_fan_readings(struct adm1031_data *data, int chan)
 447 {
 448         int res = 0;
 449
 450         if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
 451                 switch (data->conf1 & 0x60) {
 452                 case 0x00:      /* remote temp1 controls fan1 remote temp2 controls fan2 */
 453                         res = data->temp[chan+1] >=
 454                               AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
 455                         break;
 456                 case 0x20:      /* remote temp1 controls both fans */
 457                         res =
 458                             data->temp[1] >=
 459                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
 460                         break;
 461                 case 0x40:      /* remote temp2 controls both fans */
 462                         res =
 463                             data->temp[2] >=
 464                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
 465                         break;
 466                 case 0x60:      /* max controls both fans */
 467                         res =
 468                             data->temp[0] >=
 469                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
 470                             || data->temp[1] >=
 471                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
 472                             || (data->chip_type == adm1031
 473                                 && data->temp[2] >=
 474                                 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
 475                         break;
 476                 }
 477         } else {
 478                 res = data->pwm[chan] > 0;
 479         }
 480         return res;
 481 }
 482
 483
 484 static ssize_t show_fan(struct device *dev, char *buf, int nr)
 485 {
 486         struct adm1031_data *data = adm1031_update_device(dev);
 487         int value;
 488
 489         value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
 490                                  FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
 491         return sprintf(buf, "%d\n", value);
 492 }
 493
 494 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
 495 {
 496         struct adm1031_data *data = adm1031_update_device(dev);
 497         return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
 498 }
 499 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
 500 {
 501         struct adm1031_data *data = adm1031_update_device(dev);
 502         return sprintf(buf, "%d\n",
 503                        FAN_FROM_REG(data->fan_min[nr],
 504                                     FAN_DIV_FROM_REG(data->fan_div[nr])));
 505 }
 506 static ssize_t
 507 set_fan_min(struct device *dev, const char *buf, size_t count, int nr)
 508 {
 509         struct i2c_client *client = to_i2c_client(dev);
 510         struct adm1031_data *data = i2c_get_clientdata(client);
 511         int val = simple_strtol(buf, NULL, 10);
 512
 513         down(&data->update_lock);
 514         if (val) {
 515                 data->fan_min[nr] =
 516                         FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
 517         } else {
 518                 data->fan_min[nr] = 0xff;
 519         }
 520         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
 521         up(&data->update_lock);
 522         return count;
 523 }
 524 static ssize_t
 525 set_fan_div(struct device *dev, const char *buf, size_t count, int nr)
 526 {
 527         struct i2c_client *client = to_i2c_client(dev);
 528         struct adm1031_data *data = i2c_get_clientdata(client);
 529         int val = simple_strtol(buf, NULL, 10);
 530         u8 tmp;
 531         int old_div;
 532         int new_min;
 533
 534         tmp = val == 8 ? 0xc0 :
 535               val == 4 ? 0x80 :
 536               val == 2 ? 0x40 :
 537               val == 1 ? 0x00 :
 538               0xff;
 539         if (tmp == 0xff)
 540                 return -EINVAL;
 541
 542         down(&data->update_lock);
 543         old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
 544         data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
 545         new_min = data->fan_min[nr] * old_div /
 546                 FAN_DIV_FROM_REG(data->fan_div[nr]);
 547         data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
 548         data->fan[nr] = data->fan[nr] * old_div /
 549                 FAN_DIV_FROM_REG(data->fan_div[nr]);
 550
 551         adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
 552                             data->fan_div[nr]);
 553         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
 554                             data->fan_min[nr]);
 555         up(&data->update_lock);
 556         return count;
 557 }
 558
 559 #define fan_offset(offset)                                              \
 560 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 561 {                                                                       \
 562         return show_fan(dev, buf, offset - 1);                  \
 563 }                                                                       \
 564 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)   \
 565 {                                                                       \
 566         return show_fan_min(dev, buf, offset - 1);                      \
 567 }                                                                       \
 568 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf)   \
 569 {                                                                       \
 570         return show_fan_div(dev, buf, offset - 1);                      \
 571 }                                                                       \
 572 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr,               \
 573         const char *buf, size_t count)                                  \
 574 {                                                                       \
 575         return set_fan_min(dev, buf, count, offset - 1);                \
 576 }                                                                       \
 577 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr,               \
 578         const char *buf, size_t count)                                  \
 579 {                                                                       \
 580         return set_fan_div(dev, buf, count, offset - 1);                \
 581 }                                                                       \
 582 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset,     \
 583                    NULL);                                               \
 584 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,                \
 585                    show_fan_##offset##_min, set_fan_##offset##_min);    \
 586 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,                \
 587                    show_fan_##offset##_div, set_fan_##offset##_div);    \
 588 static DEVICE_ATTR(auto_fan##offset##_min_pwm, S_IRUGO | S_IWUSR,       \
 589                    show_pwm_##offset, set_pwm_##offset)
 590
 591 fan_offset(1);
 592 fan_offset(2);
 593
 594
 595 /* Temps */
 596 static ssize_t show_temp(struct device *dev, char *buf, int nr)
 597 {
 598         struct adm1031_data *data = adm1031_update_device(dev);
 599         int ext;
 600         ext = nr == 0 ?
 601             ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
 602             (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
 603         return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
 604 }
 605 static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
 606 {
 607         struct adm1031_data *data = adm1031_update_device(dev);
 608         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
 609 }
 610 static ssize_t show_temp_max(struct device *dev, char *buf, int nr)
 611 {
 612         struct adm1031_data *data = adm1031_update_device(dev);
 613         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
 614 }
 615 static ssize_t show_temp_crit(struct device *dev, char *buf, int nr)
 616 {
 617         struct adm1031_data *data = adm1031_update_device(dev);
 618         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
 619 }
 620 static ssize_t
 621 set_temp_min(struct device *dev, const char *buf, size_t count, int nr)
 622 {
 623         struct i2c_client *client = to_i2c_client(dev);
 624         struct adm1031_data *data = i2c_get_clientdata(client);
 625         int val;
 626
 627         val = simple_strtol(buf, NULL, 10);
 628         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 629         down(&data->update_lock);
 630         data->temp_min[nr] = TEMP_TO_REG(val);
 631         adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
 632                             data->temp_min[nr]);
 633         up(&data->update_lock);
 634         return count;
 635 }
 636 static ssize_t
 637 set_temp_max(struct device *dev, const char *buf, size_t count, int nr)
 638 {
 639         struct i2c_client *client = to_i2c_client(dev);
 640         struct adm1031_data *data = i2c_get_clientdata(client);
 641         int val;
 642
 643         val = simple_strtol(buf, NULL, 10);
 644         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 645         down(&data->update_lock);
 646         data->temp_max[nr] = TEMP_TO_REG(val);
 647         adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
 648                             data->temp_max[nr]);
 649         up(&data->update_lock);
 650         return count;
 651 }
 652 static ssize_t
 653 set_temp_crit(struct device *dev, const char *buf, size_t count, int nr)
 654 {
 655         struct i2c_client *client = to_i2c_client(dev);
 656         struct adm1031_data *data = i2c_get_clientdata(client);
 657         int val;
 658
 659         val = simple_strtol(buf, NULL, 10);
 660         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 661         down(&data->update_lock);
 662         data->temp_crit[nr] = TEMP_TO_REG(val);
 663         adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
 664                             data->temp_crit[nr]);
 665         up(&data->update_lock);
 666         return count;
 667 }
 668
 669 #define temp_reg(offset)                                                        \
 670 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf)                \
 671 {                                                                               \
 672         return show_temp(dev, buf, offset - 1);                         \
 673 }                                                                               \
 674 static ssize_t show_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)          \
 675 {                                                                               \
 676         return show_temp_min(dev, buf, offset - 1);                             \
 677 }                                                                               \
 678 static ssize_t show_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)          \
 679 {                                                                               \
 680         return show_temp_max(dev, buf, offset - 1);                             \
 681 }                                                                               \
 682 static ssize_t show_temp_##offset##_crit (struct device *dev, struct device_attribute *attr, char *buf) \
 683 {                                                                               \
 684         return show_temp_crit(dev, buf, offset - 1);                    \
 685 }                                                                               \
 686 static ssize_t set_temp_##offset##_min (struct device *dev, struct device_attribute *attr,                      \
 687                                         const char *buf, size_t count)          \
 688 {                                                                               \
 689         return set_temp_min(dev, buf, count, offset - 1);                       \
 690 }                                                                               \
 691 static ssize_t set_temp_##offset##_max (struct device *dev, struct device_attribute *attr,                      \
 692                                         const char *buf, size_t count)          \
 693 {                                                                               \
 694         return set_temp_max(dev, buf, count, offset - 1);                       \
 695 }                                                                               \
 696 static ssize_t set_temp_##offset##_crit (struct device *dev, struct device_attribute *attr,                     \
 697                                          const char *buf, size_t count)         \
 698 {                                                                               \
 699         return set_temp_crit(dev, buf, count, offset - 1);                      \
 700 }                                                                               \
 701 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset,           \
 702                    NULL);                                                       \
 703 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,                       \
 704                    show_temp_##offset##_min, set_temp_##offset##_min);          \
 705 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,                       \
 706                    show_temp_##offset##_max, set_temp_##offset##_max);          \
 707 static DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR,                      \
 708                    show_temp_##offset##_crit, set_temp_##offset##_crit)
 709
 710 temp_reg(1);
 711 temp_reg(2);
 712 temp_reg(3);
 713
 714 /* Alarms */
 715 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 716 {
 717         struct adm1031_data *data = adm1031_update_device(dev);
 718         return sprintf(buf, "%d\n", data->alarm);
 719 }
 720
 721 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 722
 723
 724 static int adm1031_attach_adapter(struct i2c_adapter *adapter)
 725 {
 726         if (!(adapter->class & I2C_CLASS_HWMON))
 727                 return 0;
 728         return i2c_detect(adapter, &addr_data, adm1031_detect);
 729 }
 730
 731 /* This function is called by i2c_detect */
 732 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
 733 {
 734         struct i2c_client *new_client;
 735         struct adm1031_data *data;
 736         int err = 0;
 737         const char *name = "";
 738
 739         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 740                 goto exit;
 741
 742         if (!(data = kmalloc(sizeof(struct adm1031_data), GFP_KERNEL))) {
 743                 err = -ENOMEM;
 744                 goto exit;
 745         }
 746         memset(data, 0, sizeof(struct adm1031_data));
 747
 748         new_client = &data->client;
 749         i2c_set_clientdata(new_client, data);
 750         new_client->addr = address;
 751         new_client->adapter = adapter;
 752         new_client->driver = &adm1031_driver;
 753         new_client->flags = 0;
 754
 755         if (kind < 0) {
 756                 int id, co;
 757                 id = i2c_smbus_read_byte_data(new_client, 0x3d);
 758                 co = i2c_smbus_read_byte_data(new_client, 0x3e);
 759
 760                 if (!((id == 0x31 || id == 0x30) && co == 0x41))
 761                         goto exit_free;
 762                 kind = (id == 0x30) ? adm1030 : adm1031;
 763         }
 764
 765         if (kind <= 0)
 766                 kind = adm1031;
 767
 768         /* Given the detected chip type, set the chip name and the
 769          * auto fan control helper table. */
 770         if (kind == adm1030) {
 771                 name = "adm1030";
 772                 data->chan_select_table = &auto_channel_select_table_adm1030;
 773         } else if (kind == adm1031) {
 774                 name = "adm1031";
 775                 data->chan_select_table = &auto_channel_select_table_adm1031;
 776         }
 777         data->chip_type = kind;
 778
 779         strlcpy(new_client->name, name, I2C_NAME_SIZE);
 780         data->valid = 0;
 781         init_MUTEX(&data->update_lock);
 782
 783         /* Tell the I2C layer a new client has arrived */
 784         if ((err = i2c_attach_client(new_client)))
 785                 goto exit_free;
 786
 787         /* Initialize the ADM1031 chip */
 788         adm1031_init_client(new_client);
 789
 790         /* Register sysfs hooks */
 791         device_create_file(&new_client->dev, &dev_attr_fan1_input);
 792         device_create_file(&new_client->dev, &dev_attr_fan1_div);
 793         device_create_file(&new_client->dev, &dev_attr_fan1_min);
 794         device_create_file(&new_client->dev, &dev_attr_pwm1);
 795         device_create_file(&new_client->dev, &dev_attr_auto_fan1_channel);
 796         device_create_file(&new_client->dev, &dev_attr_temp1_input);
 797         device_create_file(&new_client->dev, &dev_attr_temp1_min);
 798         device_create_file(&new_client->dev, &dev_attr_temp1_max);
 799         device_create_file(&new_client->dev, &dev_attr_temp1_crit);
 800         device_create_file(&new_client->dev, &dev_attr_temp2_input);
 801         device_create_file(&new_client->dev, &dev_attr_temp2_min);
 802         device_create_file(&new_client->dev, &dev_attr_temp2_max);
 803         device_create_file(&new_client->dev, &dev_attr_temp2_crit);
 804
 805         device_create_file(&new_client->dev, &dev_attr_auto_temp1_off);
 806         device_create_file(&new_client->dev, &dev_attr_auto_temp1_min);
 807         device_create_file(&new_client->dev, &dev_attr_auto_temp1_max);
 808
 809         device_create_file(&new_client->dev, &dev_attr_auto_temp2_off);
 810         device_create_file(&new_client->dev, &dev_attr_auto_temp2_min);
 811         device_create_file(&new_client->dev, &dev_attr_auto_temp2_max);
 812
 813         device_create_file(&new_client->dev, &dev_attr_auto_fan1_min_pwm);
 814
 815         device_create_file(&new_client->dev, &dev_attr_alarms);
 816
 817         if (kind == adm1031) {
 818                 device_create_file(&new_client->dev, &dev_attr_fan2_input);
 819                 device_create_file(&new_client->dev, &dev_attr_fan2_div);
 820                 device_create_file(&new_client->dev, &dev_attr_fan2_min);
 821                 device_create_file(&new_client->dev, &dev_attr_pwm2);
 822                 device_create_file(&new_client->dev,
 823                                    &dev_attr_auto_fan2_channel);
 824                 device_create_file(&new_client->dev, &dev_attr_temp3_input);
 825                 device_create_file(&new_client->dev, &dev_attr_temp3_min);
 826                 device_create_file(&new_client->dev, &dev_attr_temp3_max);
 827                 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
 828                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_off);
 829                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_min);
 830                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_max);
 831                 device_create_file(&new_client->dev, &dev_attr_auto_fan2_min_pwm);
 832         }
 833
 834         return 0;
 835
 836 exit_free:
 837         kfree(new_client);
 838 exit:
 839         return err;
 840 }
 841
 842 static int adm1031_detach_client(struct i2c_client *client)
 843 {
 844         int ret;
 845         if ((ret = i2c_detach_client(client)) != 0) {
 846                 return ret;
 847         }
 848         kfree(client);
 849         return 0;
 850 }
 851
 852 static void adm1031_init_client(struct i2c_client *client)
 853 {
 854         unsigned int read_val;
 855         unsigned int mask;
 856         struct adm1031_data *data = i2c_get_clientdata(client);
 857
 858         mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
 859         if (data->chip_type == adm1031) {
 860                 mask |= (ADM1031_CONF2_PWM2_ENABLE |
 861                         ADM1031_CONF2_TACH2_ENABLE);
 862         }
 863         /* Initialize the ADM1031 chip (enables fan speed reading ) */
 864         read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
 865         if ((read_val | mask) != read_val) {
 866             adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
 867         }
 868
 869         read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
 870         if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
 871             adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
 872                                 ADM1031_CONF1_MONITOR_ENABLE);
 873         }
 874
 875 }
 876
 877 static struct adm1031_data *adm1031_update_device(struct device *dev)
 878 {
 879         struct i2c_client *client = to_i2c_client(dev);
 880         struct adm1031_data *data = i2c_get_clientdata(client);
 881         int chan;
 882
 883         down(&data->update_lock);
 884
 885         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 886             || !data->valid) {
 887
 888                 dev_dbg(&client->dev, "Starting adm1031 update\n");
 889                 for (chan = 0;
 890                      chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
 891                         u8 oldh, newh;
 892
 893                         oldh =
 894                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
 895                         data->ext_temp[chan] =
 896                             adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
 897                         newh =
 898                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
 899                         if (newh != oldh) {
 900                                 data->ext_temp[chan] =
 901                                     adm1031_read_value(client,
 902                                                        ADM1031_REG_EXT_TEMP);
 903 #ifdef DEBUG
 904                                 oldh =
 905                                     adm1031_read_value(client,
 906                                                        ADM1031_REG_TEMP(chan));
 907
 908                                 /* oldh is actually newer */
 909                                 if (newh != oldh)
 910                                         dev_warn(&client->dev,
 911                                                  "Remote temperature may be "
 912                                                  "wrong.\n");
 913 #endif
 914                         }
 915                         data->temp[chan] = newh;
 916
 917                         data->temp_min[chan] =
 918                             adm1031_read_value(client,
 919                                                ADM1031_REG_TEMP_MIN(chan));
 920                         data->temp_max[chan] =
 921                             adm1031_read_value(client,
 922                                                ADM1031_REG_TEMP_MAX(chan));
 923                         data->temp_crit[chan] =
 924                             adm1031_read_value(client,
 925                                                ADM1031_REG_TEMP_CRIT(chan));
 926                         data->auto_temp[chan] =
 927                             adm1031_read_value(client,
 928                                                ADM1031_REG_AUTO_TEMP(chan));
 929
 930                 }
 931
 932                 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
 933                 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
 934
 935                 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
 936                              | (adm1031_read_value(client, ADM1031_REG_STATUS(1))
 937                                 << 8);
 938                 if (data->chip_type == adm1030) {
 939                         data->alarm &= 0xc0ff;
 940                 }
 941
 942                 for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
 943                         data->fan_div[chan] =
 944                             adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
 945                         data->fan_min[chan] =
 946                             adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
 947                         data->fan[chan] =
 948                             adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
 949                         data->pwm[chan] =
 950                             0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
 951                                    (4*chan));
 952                 }
 953                 data->last_updated = jiffies;
 954                 data->valid = 1;
 955         }
 956
 957         up(&data->update_lock);
 958
 959         return data;
 960 }
 961
 962 static int __init sensors_adm1031_init(void)
 963 {
 964         return i2c_add_driver(&adm1031_driver);
 965 }
 966
 967 static void __exit sensors_adm1031_exit(void)
 968 {
 969         i2c_del_driver(&adm1031_driver);
 970 }
 971
 972 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
 973 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
 974 MODULE_LICENSE("GPL");
 975
 976 module_init(sensors_adm1031_init);
 977 module_exit(sensors_adm1031_exit);