drivers/i2c/chips/adm1031.c

   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/i2c.h>
  28 #include <linux/i2c-sensor.h>
  29
  30 /* Following macros takes channel parameter starting from 0 to 2 */
  31 #define ADM1031_REG_FAN_SPEED(nr)       (0x08 + (nr))
  32 #define ADM1031_REG_FAN_DIV(nr)         (0x20  + (nr))
  33 #define ADM1031_REG_PWM                 (0x22)
  34 #define ADM1031_REG_FAN_MIN(nr)         (0x10 + (nr))
  35
  36 #define ADM1031_REG_TEMP_MAX(nr)        (0x14  + 4*(nr))
  37 #define ADM1031_REG_TEMP_MIN(nr)        (0x15  + 4*(nr))
  38 #define ADM1031_REG_TEMP_CRIT(nr)       (0x16  + 4*(nr))
  39
  40 #define ADM1031_REG_TEMP(nr)            (0xa + (nr))
  41 #define ADM1031_REG_AUTO_TEMP(nr)       (0x24 + (nr))
  42
  43 #define ADM1031_REG_STATUS(nr)          (0x2 + (nr))
  44
  45 #define ADM1031_REG_CONF1               0x0
  46 #define ADM1031_REG_CONF2               0x1
  47 #define ADM1031_REG_EXT_TEMP            0x6
  48
  49 #define ADM1031_CONF1_MONITOR_ENABLE    0x01    /* Monitoring enable */
  50 #define ADM1031_CONF1_PWM_INVERT        0x08    /* PWM Invert */
  51 #define ADM1031_CONF1_AUTO_MODE         0x80    /* Auto FAN */
  52
  53 #define ADM1031_CONF2_PWM1_ENABLE       0x01
  54 #define ADM1031_CONF2_PWM2_ENABLE       0x02
  55 #define ADM1031_CONF2_TACH1_ENABLE      0x04
  56 #define ADM1031_CONF2_TACH2_ENABLE      0x08
  57 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
  58
  59 /* Addresses to scan */
  60 static unsigned short normal_i2c[] = { I2C_CLIENT_END };
  61 static unsigned short normal_i2c_range[] = { 0x2c, 0x2e, I2C_CLIENT_END };
  62 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  63 static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
  64
  65 /* Insmod parameters */
  66 SENSORS_INSMOD_2(adm1030, adm1031);
  67
  68 typedef u8 auto_chan_table_t[8][2];
  69
  70 /* Each client has this additional data */
  71 struct adm1031_data {
  72         struct i2c_client client;
  73         struct semaphore update_lock;
  74         int chip_type;
  75         char valid;             /* !=0 if following fields are valid */
  76         unsigned long last_updated;     /* In jiffies */
  77         /* The chan_select_table contains the possible configurations for
  78          * auto fan control.
  79          */
  80         auto_chan_table_t *chan_select_table;
  81         u16 alarm;
  82         u8 conf1;
  83         u8 conf2;
  84         u8 fan[2];
  85         u8 fan_div[2];
  86         u8 fan_min[2];
  87         u8 pwm[2];
  88         u8 old_pwm[2];
  89         s8 temp[3];
  90         u8 ext_temp[3];
  91         u8 auto_temp[3];
  92         u8 auto_temp_min[3];
  93         u8 auto_temp_off[3];
  94         u8 auto_temp_max[3];
  95         s8 temp_min[3];
  96         s8 temp_max[3];
  97         s8 temp_crit[3];
  98 };
  99
 100 static int adm1031_attach_adapter(struct i2c_adapter *adapter);
 101 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind);
 102 static void adm1031_init_client(struct i2c_client *client);
 103 static int adm1031_detach_client(struct i2c_client *client);
 104 static struct adm1031_data *adm1031_update_device(struct device *dev);
 105
 106 /* This is the driver that will be inserted */
 107 static struct i2c_driver adm1031_driver = {
 108         .owner = THIS_MODULE,
 109         .name = "adm1031",
 110         .flags = I2C_DF_NOTIFY,
 111         .attach_adapter = adm1031_attach_adapter,
 112         .detach_client = adm1031_detach_client,
 113 };
 114
 115 static int adm1031_id;
 116
 117 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
 118 {
 119         return i2c_smbus_read_byte_data(client, reg);
 120 }
 121
 122 static inline int
 123 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
 124 {
 125         return i2c_smbus_write_byte_data(client, reg, value);
 126 }
 127
 128
 129 #define TEMP_TO_REG(val)                (((val) < 0 ? ((val - 500) / 1000) : \
 130                                         ((val + 500) / 1000)))
 131
 132 #define TEMP_FROM_REG(val)              ((val) * 1000)
 133
 134 #define TEMP_FROM_REG_EXT(val, ext)     (TEMP_FROM_REG(val) + (ext) * 125)
 135
 136 #define FAN_FROM_REG(reg, div)          ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
 137
 138 static int FAN_TO_REG(int reg, int div)
 139 {
 140         int tmp;
 141         tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
 142         return tmp > 255 ? 255 : tmp;
 143 }
 144
 145 #define FAN_DIV_FROM_REG(reg)           (1<<(((reg)&0xc0)>>6))
 146
 147 #define PWM_TO_REG(val)                 (SENSORS_LIMIT((val), 0, 255) >> 4)
 148 #define PWM_FROM_REG(val)               ((val) << 4)
 149
 150 #define FAN_CHAN_FROM_REG(reg)          (((reg) >> 5) & 7)
 151 #define FAN_CHAN_TO_REG(val, reg)       \
 152         (((reg) & 0x1F) | (((val) << 5) & 0xe0))
 153
 154 #define AUTO_TEMP_MIN_TO_REG(val, reg)  \
 155         ((((val)/500) & 0xf8)|((reg) & 0x7))
 156 #define AUTO_TEMP_RANGE_FROM_REG(reg)   (5000 * (1<< ((reg)&0x7)))
 157 #define AUTO_TEMP_MIN_FROM_REG(reg)     (1000 * ((((reg) >> 3) & 0x1f) << 2))
 158
 159 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
 160
 161 #define AUTO_TEMP_OFF_FROM_REG(reg)             \
 162         (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
 163
 164 #define AUTO_TEMP_MAX_FROM_REG(reg)             \
 165         (AUTO_TEMP_RANGE_FROM_REG(reg) +        \
 166         AUTO_TEMP_MIN_FROM_REG(reg))
 167
 168 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
 169 {
 170         int ret;
 171         int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
 172
 173         range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
 174         ret = ((reg & 0xf8) |
 175                (range < 10000 ? 0 :
 176                 range < 20000 ? 1 :
 177                 range < 40000 ? 2 : range < 80000 ? 3 : 4));
 178         return ret;
 179 }
 180
 181 /* FAN auto control */
 182 #define GET_FAN_AUTO_BITFIELD(data, idx)        \
 183         (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
 184
 185 /* The tables below contains the possible values for the auto fan
 186  * control bitfields. the index in the table is the register value.
 187  * MSb is the auto fan control enable bit, so the four first entries
 188  * in the table disables auto fan control when both bitfields are zero.
 189  */
 190 static auto_chan_table_t auto_channel_select_table_adm1031 = {
 191         {0, 0}, {0, 0}, {0, 0}, {0, 0},
 192         {2 /*0b010 */ , 4 /*0b100 */ },
 193         {2 /*0b010 */ , 2 /*0b010 */ },
 194         {4 /*0b100 */ , 4 /*0b100 */ },
 195         {7 /*0b111 */ , 7 /*0b111 */ },
 196 };
 197
 198 static auto_chan_table_t auto_channel_select_table_adm1030 = {
 199         {0, 0}, {0, 0}, {0, 0}, {0, 0},
 200         {2 /*0b10 */            , 0},
 201         {0xff /*invalid */      , 0},
 202         {0xff /*invalid */      , 0},
 203         {3 /*0b11 */            , 0},
 204 };
 205
 206 /* That function checks if a bitfield is valid and returns the other bitfield
 207  * nearest match if no exact match where found.
 208  */
 209 static int
 210 get_fan_auto_nearest(struct adm1031_data *data,
 211                      int chan, u8 val, u8 reg, u8 * new_reg)
 212 {
 213         int i;
 214         int first_match = -1, exact_match = -1;
 215         u8 other_reg_val =
 216             (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
 217
 218         if (val == 0) {
 219                 *new_reg = 0;
 220                 return 0;
 221         }
 222
 223         for (i = 0; i < 8; i++) {
 224                 if ((val == (*data->chan_select_table)[i][chan]) &&
 225                     ((*data->chan_select_table)[i][chan ? 0 : 1] ==
 226                      other_reg_val)) {
 227                         /* We found an exact match */
 228                         exact_match = i;
 229                         break;
 230                 } else if (val == (*data->chan_select_table)[i][chan] &&
 231                            first_match == -1) {
 232                         /* Save the first match in case of an exact match has not been
 233                          * found
 234                          */
 235                         first_match = i;
 236                 }
 237         }
 238
 239         if (exact_match >= 0) {
 240                 *new_reg = exact_match;
 241         } else if (first_match >= 0) {
 242                 *new_reg = first_match;
 243         } else {
 244                 return -EINVAL;
 245         }
 246         return 0;
 247 }
 248
 249 static ssize_t show_fan_auto_channel(struct device *dev, char *buf, int nr)
 250 {
 251         struct adm1031_data *data = adm1031_update_device(dev);
 252         return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
 253 }
 254
 255 static ssize_t
 256 set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
 257 {
 258         struct i2c_client *client = to_i2c_client(dev);
 259         struct adm1031_data *data = i2c_get_clientdata(client);
 260         int val;
 261         u8 reg;
 262         int ret;
 263         u8 old_fan_mode;
 264
 265         old_fan_mode = data->conf1;
 266
 267         down(&data->update_lock);
 268         val = simple_strtol(buf, NULL, 10);
 269
 270         if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
 271                 up(&data->update_lock);
 272                 return ret;
 273         }
 274         if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^
 275             (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
 276                 if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
 277                         /* Switch to Auto Fan Mode
 278                          * Save PWM registers
 279                          * Set PWM registers to 33% Both */
 280                         data->old_pwm[0] = data->pwm[0];
 281                         data->old_pwm[1] = data->pwm[1];
 282                         adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
 283                 } else {
 284                         /* Switch to Manual Mode */
 285                         data->pwm[0] = data->old_pwm[0];
 286                         data->pwm[1] = data->old_pwm[1];
 287                         /* Restore PWM registers */
 288                         adm1031_write_value(client, ADM1031_REG_PWM,
 289                                             data->pwm[0] | (data->pwm[1] << 4));
 290                 }
 291         }
 292         data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
 293         adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
 294         up(&data->update_lock);
 295         return count;
 296 }
 297
 298 #define fan_auto_channel_offset(offset)                                         \
 299 static ssize_t show_fan_auto_channel_##offset (struct device *dev, char *buf)   \
 300 {                                                                               \
 301         return show_fan_auto_channel(dev, buf, 0x##offset - 1);                 \
 302 }                                                                               \
 303 static ssize_t set_fan_auto_channel_##offset (struct device *dev,               \
 304         const char *buf, size_t count)                                          \
 305 {                                                                               \
 306         return set_fan_auto_channel(dev, buf, count, 0x##offset - 1);           \
 307 }                                                                               \
 308 static DEVICE_ATTR(auto_fan##offset##_channel, S_IRUGO | S_IWUSR,               \
 309                    show_fan_auto_channel_##offset,                              \
 310                    set_fan_auto_channel_##offset)
 311
 312 fan_auto_channel_offset(1);
 313 fan_auto_channel_offset(2);
 314
 315 /* Auto Temps */
 316 static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
 317 {
 318         struct adm1031_data *data = adm1031_update_device(dev);
 319         return sprintf(buf, "%d\n",
 320                        AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
 321 }
 322 static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
 323 {
 324         struct adm1031_data *data = adm1031_update_device(dev);
 325         return sprintf(buf, "%d\n",
 326                        AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
 327 }
 328 static ssize_t
 329 set_auto_temp_min(struct device *dev, const char *buf, size_t count, int nr)
 330 {
 331         struct i2c_client *client = to_i2c_client(dev);
 332         struct adm1031_data *data = i2c_get_clientdata(client);
 333         int val;
 334
 335         down(&data->update_lock);
 336         val = simple_strtol(buf, NULL, 10);
 337         data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
 338         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
 339                             data->auto_temp[nr]);
 340         up(&data->update_lock);
 341         return count;
 342 }
 343 static ssize_t show_auto_temp_max(struct device *dev, char *buf, int nr)
 344 {
 345         struct adm1031_data *data = adm1031_update_device(dev);
 346         return sprintf(buf, "%d\n",
 347                        AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
 348 }
 349 static ssize_t
 350 set_auto_temp_max(struct device *dev, const char *buf, size_t count, int nr)
 351 {
 352         struct i2c_client *client = to_i2c_client(dev);
 353         struct adm1031_data *data = i2c_get_clientdata(client);
 354         int val;
 355
 356         down(&data->update_lock);
 357         val = simple_strtol(buf, NULL, 10);
 358         data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
 359         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
 360                             data->temp_max[nr]);
 361         up(&data->update_lock);
 362         return count;
 363 }
 364
 365 #define auto_temp_reg(offset)                                                   \
 366 static ssize_t show_auto_temp_##offset##_off (struct device *dev, char *buf)    \
 367 {                                                                               \
 368         return show_auto_temp_off(dev, buf, 0x##offset - 1);                    \
 369 }                                                                               \
 370 static ssize_t show_auto_temp_##offset##_min (struct device *dev, char *buf)    \
 371 {                                                                               \
 372         return show_auto_temp_min(dev, buf, 0x##offset - 1);                    \
 373 }                                                                               \
 374 static ssize_t show_auto_temp_##offset##_max (struct device *dev, char *buf)    \
 375 {                                                                               \
 376         return show_auto_temp_max(dev, buf, 0x##offset - 1);                    \
 377 }                                                                               \
 378 static ssize_t set_auto_temp_##offset##_min (struct device *dev,                \
 379                                              const char *buf, size_t count)     \
 380 {                                                                               \
 381         return set_auto_temp_min(dev, buf, count, 0x##offset - 1);              \
 382 }                                                                               \
 383 static ssize_t set_auto_temp_##offset##_max (struct device *dev,                \
 384                                              const char *buf, size_t count)     \
 385 {                                                                               \
 386         return set_auto_temp_max(dev, buf, count, 0x##offset - 1);              \
 387 }                                                                               \
 388 static DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO,                            \
 389                    show_auto_temp_##offset##_off, NULL);                        \
 390 static DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR,                  \
 391                    show_auto_temp_##offset##_min, set_auto_temp_##offset##_min);\
 392 static DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR,                  \
 393                    show_auto_temp_##offset##_max, set_auto_temp_##offset##_max)
 394
 395 auto_temp_reg(1);
 396 auto_temp_reg(2);
 397 auto_temp_reg(3);
 398
 399 /* pwm */
 400 static ssize_t show_pwm(struct device *dev, char *buf, int nr)
 401 {
 402         struct adm1031_data *data = adm1031_update_device(dev);
 403         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
 404 }
 405 static ssize_t
 406 set_pwm(struct device *dev, const char *buf, size_t count, int nr)
 407 {
 408         struct i2c_client *client = to_i2c_client(dev);
 409         struct adm1031_data *data = i2c_get_clientdata(client);
 410         int val;
 411         int reg;
 412         down(&data->update_lock);
 413         val = simple_strtol(buf, NULL, 10);
 414         if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
 415             (((val>>4) & 0xf) != 5)) {
 416                 /* In automatic mode, the only PWM accepted is 33% */
 417                 up(&data->update_lock);
 418                 return -EINVAL;
 419         }
 420         data->pwm[nr] = PWM_TO_REG(val);
 421         reg = adm1031_read_value(client, ADM1031_REG_PWM);
 422         adm1031_write_value(client, ADM1031_REG_PWM,
 423                             nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
 424                             : (data->pwm[nr] & 0xf) | (reg & 0xf0));
 425         up(&data->update_lock);
 426         return count;
 427 }
 428
 429 #define pwm_reg(offset)                                                 \
 430 static ssize_t show_pwm_##offset (struct device *dev, char *buf)        \
 431 {                                                                       \
 432         return show_pwm(dev, buf, 0x##offset - 1);                      \
 433 }                                                                       \
 434 static ssize_t set_pwm_##offset (struct device *dev,                    \
 435                                  const char *buf, size_t count)         \
 436 {                                                                       \
 437         return set_pwm(dev, buf, count, 0x##offset - 1);                \
 438 }                                                                       \
 439 static DEVICE_ATTR(fan##offset##_pwm, S_IRUGO | S_IWUSR,                \
 440                    show_pwm_##offset, set_pwm_##offset)
 441
 442 pwm_reg(1);
 443 pwm_reg(2);
 444
 445 /* Fans */
 446
 447 /*
 448  * That function checks the cases where the fan reading is not
 449  * relevent.  It is used to provide 0 as fan reading when the fan is
 450  * not supposed to run
 451  */
 452 static int trust_fan_readings(struct adm1031_data *data, int chan)
 453 {
 454         int res = 0;
 455
 456         if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
 457                 switch (data->conf1 & 0x60) {
 458                 case 0x00:      /* remote temp1 controls fan1 remote temp2 controls fan2 */
 459                         res = data->temp[chan+1] >=
 460                               AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
 461                         break;
 462                 case 0x20:      /* remote temp1 controls both fans */
 463                         res =
 464                             data->temp[1] >=
 465                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
 466                         break;
 467                 case 0x40:      /* remote temp2 controls both fans */
 468                         res =
 469                             data->temp[2] >=
 470                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
 471                         break;
 472                 case 0x60:      /* max controls both fans */
 473                         res =
 474                             data->temp[0] >=
 475                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
 476                             || data->temp[1] >=
 477                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
 478                             || (data->chip_type == adm1031
 479                                 && data->temp[2] >=
 480                                 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
 481                         break;
 482                 }
 483         } else {
 484                 res = data->pwm[chan] > 0;
 485         }
 486         return res;
 487 }
 488
 489
 490 static ssize_t show_fan(struct device *dev, char *buf, int nr)
 491 {
 492         struct adm1031_data *data = adm1031_update_device(dev);
 493         int value;
 494
 495         value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
 496                                  FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
 497         return sprintf(buf, "%d\n", value);
 498 }
 499
 500 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
 501 {
 502         struct adm1031_data *data = adm1031_update_device(dev);
 503         return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
 504 }
 505 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
 506 {
 507         struct adm1031_data *data = adm1031_update_device(dev);
 508         return sprintf(buf, "%d\n",
 509                        FAN_FROM_REG(data->fan_min[nr],
 510                                     FAN_DIV_FROM_REG(data->fan_div[nr])));
 511 }
 512 static ssize_t
 513 set_fan_min(struct device *dev, const char *buf, size_t count, int nr)
 514 {
 515         struct i2c_client *client = to_i2c_client(dev);
 516         struct adm1031_data *data = i2c_get_clientdata(client);
 517         int val;
 518
 519         down(&data->update_lock);
 520         val = simple_strtol(buf, NULL, 10);
 521         if (val) {
 522                 data->fan_min[nr] =
 523                         FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
 524         } else {
 525                 data->fan_min[nr] = 0xff;
 526         }
 527         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
 528         up(&data->update_lock);
 529         return count;
 530 }
 531 static ssize_t
 532 set_fan_div(struct device *dev, const char *buf, size_t count, int nr)
 533 {
 534         struct i2c_client *client = to_i2c_client(dev);
 535         struct adm1031_data *data = i2c_get_clientdata(client);
 536         int val;
 537         u8 tmp;
 538         int old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
 539         int new_min;
 540
 541         val = simple_strtol(buf, NULL, 10);
 542         tmp = val == 8 ? 0xc0 :
 543               val == 4 ? 0x80 :
 544               val == 2 ? 0x40 :
 545               val == 1 ? 0x00 :
 546               0xff;
 547         if (tmp == 0xff)
 548                 return -EINVAL;
 549         down(&data->update_lock);
 550         data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
 551         new_min = data->fan_min[nr] * old_div /
 552                 FAN_DIV_FROM_REG(data->fan_div[nr]);
 553         data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
 554         data->fan[nr] = data->fan[nr] * old_div /
 555                 FAN_DIV_FROM_REG(data->fan_div[nr]);
 556
 557         adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
 558                             data->fan_div[nr]);
 559         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
 560                             data->fan_min[nr]);
 561         up(&data->update_lock);
 562         return count;
 563 }
 564
 565 #define fan_offset(offset)                                              \
 566 static ssize_t show_fan_##offset (struct device *dev, char *buf)        \
 567 {                                                                       \
 568         return show_fan(dev, buf, 0x##offset - 1);                      \
 569 }                                                                       \
 570 static ssize_t show_fan_##offset##_min (struct device *dev, char *buf)  \
 571 {                                                                       \
 572         return show_fan_min(dev, buf, 0x##offset - 1);                  \
 573 }                                                                       \
 574 static ssize_t show_fan_##offset##_div (struct device *dev, char *buf)  \
 575 {                                                                       \
 576         return show_fan_div(dev, buf, 0x##offset - 1);                  \
 577 }                                                                       \
 578 static ssize_t set_fan_##offset##_min (struct device *dev,              \
 579         const char *buf, size_t count)                                  \
 580 {                                                                       \
 581         return set_fan_min(dev, buf, count, 0x##offset - 1);            \
 582 }                                                                       \
 583 static ssize_t set_fan_##offset##_div (struct device *dev,              \
 584         const char *buf, size_t count)                                  \
 585 {                                                                       \
 586         return set_fan_div(dev, buf, count, 0x##offset - 1);            \
 587 }                                                                       \
 588 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset,     \
 589                    NULL);                                               \
 590 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,                \
 591                    show_fan_##offset##_min, set_fan_##offset##_min);    \
 592 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,                \
 593                    show_fan_##offset##_div, set_fan_##offset##_div);    \
 594 static DEVICE_ATTR(auto_fan##offset##_min_pwm, S_IRUGO | S_IWUSR,       \
 595                    show_pwm_##offset, set_pwm_##offset)
 596
 597 fan_offset(1);
 598 fan_offset(2);
 599
 600
 601 /* Temps */
 602 static ssize_t show_temp(struct device *dev, char *buf, int nr)
 603 {
 604         struct adm1031_data *data = adm1031_update_device(dev);
 605         int ext;
 606         ext = nr == 0 ?
 607             ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
 608             (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
 609         return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
 610 }
 611 static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
 612 {
 613         struct adm1031_data *data = adm1031_update_device(dev);
 614         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
 615 }
 616 static ssize_t show_temp_max(struct device *dev, char *buf, int nr)
 617 {
 618         struct adm1031_data *data = adm1031_update_device(dev);
 619         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
 620 }
 621 static ssize_t show_temp_crit(struct device *dev, char *buf, int nr)
 622 {
 623         struct adm1031_data *data = adm1031_update_device(dev);
 624         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
 625 }
 626 static ssize_t
 627 set_temp_min(struct device *dev, const char *buf, size_t count, int nr)
 628 {
 629         struct i2c_client *client = to_i2c_client(dev);
 630         struct adm1031_data *data = i2c_get_clientdata(client);
 631         int val;
 632
 633         val = simple_strtol(buf, NULL, 10);
 634         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 635         down(&data->update_lock);
 636         data->temp_min[nr] = TEMP_TO_REG(val);
 637         adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
 638                             data->temp_min[nr]);
 639         up(&data->update_lock);
 640         return count;
 641 }
 642 static ssize_t
 643 set_temp_max(struct device *dev, const char *buf, size_t count, int nr)
 644 {
 645         struct i2c_client *client = to_i2c_client(dev);
 646         struct adm1031_data *data = i2c_get_clientdata(client);
 647         int val;
 648
 649         val = simple_strtol(buf, NULL, 10);
 650         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 651         down(&data->update_lock);
 652         data->temp_max[nr] = TEMP_TO_REG(val);
 653         adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
 654                             data->temp_max[nr]);
 655         up(&data->update_lock);
 656         return count;
 657 }
 658 static ssize_t
 659 set_temp_crit(struct device *dev, const char *buf, size_t count, int nr)
 660 {
 661         struct i2c_client *client = to_i2c_client(dev);
 662         struct adm1031_data *data = i2c_get_clientdata(client);
 663         int val;
 664
 665         val = simple_strtol(buf, NULL, 10);
 666         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 667         down(&data->update_lock);
 668         data->temp_crit[nr] = TEMP_TO_REG(val);
 669         adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
 670                             data->temp_crit[nr]);
 671         up(&data->update_lock);
 672         return count;
 673 }
 674
 675 #define temp_reg(offset)                                                        \
 676 static ssize_t show_temp_##offset (struct device *dev, char *buf)               \
 677 {                                                                               \
 678         return show_temp(dev, buf, 0x##offset - 1);                             \
 679 }                                                                               \
 680 static ssize_t show_temp_##offset##_min (struct device *dev, char *buf)         \
 681 {                                                                               \
 682         return show_temp_min(dev, buf, 0x##offset - 1);                         \
 683 }                                                                               \
 684 static ssize_t show_temp_##offset##_max (struct device *dev, char *buf)         \
 685 {                                                                               \
 686         return show_temp_max(dev, buf, 0x##offset - 1);                         \
 687 }                                                                               \
 688 static ssize_t show_temp_##offset##_crit (struct device *dev, char *buf)        \
 689 {                                                                               \
 690         return show_temp_crit(dev, buf, 0x##offset - 1);                        \
 691 }                                                                               \
 692 static ssize_t set_temp_##offset##_min (struct device *dev,                     \
 693                                         const char *buf, size_t count)          \
 694 {                                                                               \
 695         return set_temp_min(dev, buf, count, 0x##offset - 1);                   \
 696 }                                                                               \
 697 static ssize_t set_temp_##offset##_max (struct device *dev,                     \
 698                                         const char *buf, size_t count)          \
 699 {                                                                               \
 700         return set_temp_max(dev, buf, count, 0x##offset - 1);                   \
 701 }                                                                               \
 702 static ssize_t set_temp_##offset##_crit (struct device *dev,                    \
 703                                          const char *buf, size_t count)         \
 704 {                                                                               \
 705         return set_temp_crit(dev, buf, count, 0x##offset - 1);                  \
 706 }                                                                               \
 707 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset,           \
 708                    NULL);                                                       \
 709 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,                       \
 710                    show_temp_##offset##_min, set_temp_##offset##_min);          \
 711 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,                       \
 712                    show_temp_##offset##_max, set_temp_##offset##_max);          \
 713 static DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR,                      \
 714                    show_temp_##offset##_crit, set_temp_##offset##_crit)
 715
 716 temp_reg(1);
 717 temp_reg(2);
 718 temp_reg(3);
 719
 720 /* Alarms */
 721 static ssize_t show_alarms(struct device *dev, char *buf)
 722 {
 723         struct adm1031_data *data = adm1031_update_device(dev);
 724         return sprintf(buf, "%d\n", data->alarm);
 725 }
 726
 727 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 728
 729
 730 static int adm1031_attach_adapter(struct i2c_adapter *adapter)
 731 {
 732         if (!(adapter->class & I2C_CLASS_HWMON))
 733                 return 0;
 734         return i2c_detect(adapter, &addr_data, adm1031_detect);
 735 }
 736
 737 /* This function is called by i2c_detect */
 738 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
 739 {
 740         struct i2c_client *new_client;
 741         struct adm1031_data *data;
 742         int err = 0;
 743         const char *name = "";
 744
 745         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 746                 goto exit;
 747
 748         if (!(data = kmalloc(sizeof(struct adm1031_data), GFP_KERNEL))) {
 749                 err = -ENOMEM;
 750                 goto exit;
 751         }
 752         memset(data, 0, sizeof(struct adm1031_data));
 753
 754         new_client = &data->client;
 755         i2c_set_clientdata(new_client, data);
 756         new_client->addr = address;
 757         new_client->adapter = adapter;
 758         new_client->driver = &adm1031_driver;
 759         new_client->flags = 0;
 760
 761         if (kind < 0) {
 762                 int id, co;
 763                 id = i2c_smbus_read_byte_data(new_client, 0x3d);
 764                 co = i2c_smbus_read_byte_data(new_client, 0x3e);
 765
 766                 if (!((id == 0x31 || id == 0x30) && co == 0x41))
 767                         goto exit_free;
 768                 kind = (id == 0x30) ? adm1030 : adm1031;
 769         }
 770
 771         if (kind <= 0)
 772                 kind = adm1031;
 773
 774         /* Given the detected chip type, set the chip name and the
 775          * auto fan control helper table. */
 776         if (kind == adm1030) {
 777                 name = "adm1030";
 778                 data->chan_select_table = &auto_channel_select_table_adm1030;
 779         } else if (kind == adm1031) {
 780                 name = "adm1031";
 781                 data->chan_select_table = &auto_channel_select_table_adm1031;
 782         }
 783         data->chip_type = kind;
 784
 785         strlcpy(new_client->name, name, I2C_NAME_SIZE);
 786
 787         new_client->id = adm1031_id++;
 788         data->valid = 0;
 789         init_MUTEX(&data->update_lock);
 790
 791         /* Tell the I2C layer a new client has arrived */
 792         if ((err = i2c_attach_client(new_client)))
 793                 goto exit_free;
 794
 795         /* Initialize the ADM1031 chip */
 796         adm1031_init_client(new_client);
 797
 798         /* Register sysfs hooks */
 799         device_create_file(&new_client->dev, &dev_attr_fan1_input);
 800         device_create_file(&new_client->dev, &dev_attr_fan1_div);
 801         device_create_file(&new_client->dev, &dev_attr_fan1_min);
 802         device_create_file(&new_client->dev, &dev_attr_fan1_pwm);
 803         device_create_file(&new_client->dev, &dev_attr_auto_fan1_channel);
 804         device_create_file(&new_client->dev, &dev_attr_temp1_input);
 805         device_create_file(&new_client->dev, &dev_attr_temp1_min);
 806         device_create_file(&new_client->dev, &dev_attr_temp1_max);
 807         device_create_file(&new_client->dev, &dev_attr_temp1_crit);
 808         device_create_file(&new_client->dev, &dev_attr_temp2_input);
 809         device_create_file(&new_client->dev, &dev_attr_temp2_min);
 810         device_create_file(&new_client->dev, &dev_attr_temp2_max);
 811         device_create_file(&new_client->dev, &dev_attr_temp2_crit);
 812
 813         device_create_file(&new_client->dev, &dev_attr_auto_temp1_off);
 814         device_create_file(&new_client->dev, &dev_attr_auto_temp1_min);
 815         device_create_file(&new_client->dev, &dev_attr_auto_temp1_max);
 816
 817         device_create_file(&new_client->dev, &dev_attr_auto_temp2_off);
 818         device_create_file(&new_client->dev, &dev_attr_auto_temp2_min);
 819         device_create_file(&new_client->dev, &dev_attr_auto_temp2_max);
 820
 821         device_create_file(&new_client->dev, &dev_attr_auto_fan1_min_pwm);
 822
 823         device_create_file(&new_client->dev, &dev_attr_alarms);
 824
 825         if (kind == adm1031) {
 826                 device_create_file(&new_client->dev, &dev_attr_fan2_input);
 827                 device_create_file(&new_client->dev, &dev_attr_fan2_div);
 828                 device_create_file(&new_client->dev, &dev_attr_fan2_min);
 829                 device_create_file(&new_client->dev, &dev_attr_fan2_pwm);
 830                 device_create_file(&new_client->dev,
 831                                    &dev_attr_auto_fan2_channel);
 832                 device_create_file(&new_client->dev, &dev_attr_temp3_input);
 833                 device_create_file(&new_client->dev, &dev_attr_temp3_min);
 834                 device_create_file(&new_client->dev, &dev_attr_temp3_max);
 835                 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
 836                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_off);
 837                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_min);
 838                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_max);
 839                 device_create_file(&new_client->dev, &dev_attr_auto_fan2_min_pwm);
 840         }
 841
 842         return 0;
 843
 844 exit_free:
 845         kfree(new_client);
 846 exit:
 847         return err;
 848 }
 849
 850 static int adm1031_detach_client(struct i2c_client *client)
 851 {
 852         int ret;
 853         if ((ret = i2c_detach_client(client)) != 0) {
 854                 return ret;
 855         }
 856         kfree(client);
 857         return 0;
 858 }
 859
 860 static void adm1031_init_client(struct i2c_client *client)
 861 {
 862         unsigned int read_val;
 863         unsigned int mask;
 864         struct adm1031_data *data = i2c_get_clientdata(client);
 865
 866         mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
 867         if (data->chip_type == adm1031) {
 868                 mask |= (ADM1031_CONF2_PWM2_ENABLE |
 869                         ADM1031_CONF2_TACH2_ENABLE);
 870         }
 871         /* Initialize the ADM1031 chip (enables fan speed reading ) */
 872         read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
 873         if ((read_val | mask) != read_val) {
 874             adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
 875         }
 876
 877         read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
 878         if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
 879             adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
 880                                 ADM1031_CONF1_MONITOR_ENABLE);
 881         }
 882
 883 }
 884
 885 static struct adm1031_data *adm1031_update_device(struct device *dev)
 886 {
 887         struct i2c_client *client = to_i2c_client(dev);
 888         struct adm1031_data *data = i2c_get_clientdata(client);
 889         int chan;
 890
 891         down(&data->update_lock);
 892
 893         if ((jiffies - data->last_updated > HZ + HZ / 2) ||
 894             (jiffies < data->last_updated) || !data->valid) {
 895
 896                 dev_dbg(&client->dev, "Starting adm1031 update\n");
 897                 for (chan = 0;
 898                      chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
 899                         u8 oldh, newh;
 900
 901                         oldh =
 902                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
 903                         data->ext_temp[chan] =
 904                             adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
 905                         newh =
 906                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
 907                         if (newh != oldh) {
 908                                 data->ext_temp[chan] =
 909                                     adm1031_read_value(client,
 910                                                        ADM1031_REG_EXT_TEMP);
 911 #ifdef DEBUG
 912                                 oldh =
 913                                     adm1031_read_value(client,
 914                                                        ADM1031_REG_TEMP(chan));
 915
 916                                 /* oldh is actually newer */
 917                                 if (newh != oldh)
 918                                         dev_warn(&client->dev,
 919                                                  "Remote temperature may be "
 920                                                  "wrong.\n");
 921 #endif
 922                         }
 923                         data->temp[chan] = newh;
 924
 925                         data->temp_min[chan] =
 926                             adm1031_read_value(client,
 927                                                ADM1031_REG_TEMP_MIN(chan));
 928                         data->temp_max[chan] =
 929                             adm1031_read_value(client,
 930                                                ADM1031_REG_TEMP_MAX(chan));
 931                         data->temp_crit[chan] =
 932                             adm1031_read_value(client,
 933                                                ADM1031_REG_TEMP_CRIT(chan));
 934                         data->auto_temp[chan] =
 935                             adm1031_read_value(client,
 936                                                ADM1031_REG_AUTO_TEMP(chan));
 937
 938                 }
 939
 940                 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
 941                 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
 942
 943                 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
 944                              | (adm1031_read_value(client, ADM1031_REG_STATUS(1))
 945                                 << 8);
 946                 if (data->chip_type == adm1030) {
 947                         data->alarm &= 0xc0ff;
 948                 }
 949
 950                 for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
 951                         data->fan_div[chan] =
 952                             adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
 953                         data->fan_min[chan] =
 954                             adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
 955                         data->fan[chan] =
 956                             adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
 957                         data->pwm[chan] =
 958                             0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
 959                                    (4*chan));
 960                 }
 961                 data->last_updated = jiffies;
 962                 data->valid = 1;
 963         }
 964
 965         up(&data->update_lock);
 966
 967         return data;
 968 }
 969
 970 static int __init sensors_adm1031_init(void)
 971 {
 972         return i2c_add_driver(&adm1031_driver);
 973 }
 974
 975 static void __exit sensors_adm1031_exit(void)
 976 {
 977         i2c_del_driver(&adm1031_driver);
 978 }
 979
 980 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
 981 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
 982 MODULE_LICENSE("GPL");
 983
 984 module_init(sensors_adm1031_init);
 985 module_exit(sensors_adm1031_exit);