drivers/hwmon/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/jiffies.h>
  28 #include <linux/i2c.h>
  29 #include <linux/hwmon.h>
  30 #include <linux/err.h>
  31
  32 /* Following macros takes channel parameter starting from 0 to 2 */
  33 #define ADM1031_REG_FAN_SPEED(nr)       (0x08 + (nr))
  34 #define ADM1031_REG_FAN_DIV(nr)         (0x20  + (nr))
  35 #define ADM1031_REG_PWM                 (0x22)
  36 #define ADM1031_REG_FAN_MIN(nr)         (0x10 + (nr))
  37
  38 #define ADM1031_REG_TEMP_MAX(nr)        (0x14  + 4*(nr))
  39 #define ADM1031_REG_TEMP_MIN(nr)        (0x15  + 4*(nr))
  40 #define ADM1031_REG_TEMP_CRIT(nr)       (0x16  + 4*(nr))
  41
  42 #define ADM1031_REG_TEMP(nr)            (0xa + (nr))
  43 #define ADM1031_REG_AUTO_TEMP(nr)       (0x24 + (nr))
  44
  45 #define ADM1031_REG_STATUS(nr)          (0x2 + (nr))
  46
  47 #define ADM1031_REG_CONF1               0x0
  48 #define ADM1031_REG_CONF2               0x1
  49 #define ADM1031_REG_EXT_TEMP            0x6
  50
  51 #define ADM1031_CONF1_MONITOR_ENABLE    0x01    /* Monitoring enable */
  52 #define ADM1031_CONF1_PWM_INVERT        0x08    /* PWM Invert */
  53 #define ADM1031_CONF1_AUTO_MODE         0x80    /* Auto FAN */
  54
  55 #define ADM1031_CONF2_PWM1_ENABLE       0x01
  56 #define ADM1031_CONF2_PWM2_ENABLE       0x02
  57 #define ADM1031_CONF2_TACH1_ENABLE      0x04
  58 #define ADM1031_CONF2_TACH2_ENABLE      0x08
  59 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
  60
  61 /* Addresses to scan */
  62 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  63
  64 /* Insmod parameters */
  65 I2C_CLIENT_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 class_device *class_dev;
  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 inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
 116 {
 117         return i2c_smbus_read_byte_data(client, reg);
 118 }
 119
 120 static inline int
 121 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
 122 {
 123         return i2c_smbus_write_byte_data(client, reg, value);
 124 }
 125
 126
 127 #define TEMP_TO_REG(val)                (((val) < 0 ? ((val - 500) / 1000) : \
 128                                         ((val + 500) / 1000)))
 129
 130 #define TEMP_FROM_REG(val)              ((val) * 1000)
 131
 132 #define TEMP_FROM_REG_EXT(val, ext)     (TEMP_FROM_REG(val) + (ext) * 125)
 133
 134 #define FAN_FROM_REG(reg, div)          ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
 135
 136 static int FAN_TO_REG(int reg, int div)
 137 {
 138         int tmp;
 139         tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
 140         return tmp > 255 ? 255 : tmp;
 141 }
 142
 143 #define FAN_DIV_FROM_REG(reg)           (1<<(((reg)&0xc0)>>6))
 144
 145 #define PWM_TO_REG(val)                 (SENSORS_LIMIT((val), 0, 255) >> 4)
 146 #define PWM_FROM_REG(val)               ((val) << 4)
 147
 148 #define FAN_CHAN_FROM_REG(reg)          (((reg) >> 5) & 7)
 149 #define FAN_CHAN_TO_REG(val, reg)       \
 150         (((reg) & 0x1F) | (((val) << 5) & 0xe0))
 151
 152 #define AUTO_TEMP_MIN_TO_REG(val, reg)  \
 153         ((((val)/500) & 0xf8)|((reg) & 0x7))
 154 #define AUTO_TEMP_RANGE_FROM_REG(reg)   (5000 * (1<< ((reg)&0x7)))
 155 #define AUTO_TEMP_MIN_FROM_REG(reg)     (1000 * ((((reg) >> 3) & 0x1f) << 2))
 156
 157 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
 158
 159 #define AUTO_TEMP_OFF_FROM_REG(reg)             \
 160         (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
 161
 162 #define AUTO_TEMP_MAX_FROM_REG(reg)             \
 163         (AUTO_TEMP_RANGE_FROM_REG(reg) +        \
 164         AUTO_TEMP_MIN_FROM_REG(reg))
 165
 166 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
 167 {
 168         int ret;
 169         int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
 170
 171         range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
 172         ret = ((reg & 0xf8) |
 173                (range < 10000 ? 0 :
 174                 range < 20000 ? 1 :
 175                 range < 40000 ? 2 : range < 80000 ? 3 : 4));
 176         return ret;
 177 }
 178
 179 /* FAN auto control */
 180 #define GET_FAN_AUTO_BITFIELD(data, idx)        \
 181         (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
 182
 183 /* The tables below contains the possible values for the auto fan
 184  * control bitfields. the index in the table is the register value.
 185  * MSb is the auto fan control enable bit, so the four first entries
 186  * in the table disables auto fan control when both bitfields are zero.
 187  */
 188 static auto_chan_table_t auto_channel_select_table_adm1031 = {
 189         {0, 0}, {0, 0}, {0, 0}, {0, 0},
 190         {2 /*0b010 */ , 4 /*0b100 */ },
 191         {2 /*0b010 */ , 2 /*0b010 */ },
 192         {4 /*0b100 */ , 4 /*0b100 */ },
 193         {7 /*0b111 */ , 7 /*0b111 */ },
 194 };
 195
 196 static auto_chan_table_t auto_channel_select_table_adm1030 = {
 197         {0, 0}, {0, 0}, {0, 0}, {0, 0},
 198         {2 /*0b10 */            , 0},
 199         {0xff /*invalid */      , 0},
 200         {0xff /*invalid */      , 0},
 201         {3 /*0b11 */            , 0},
 202 };
 203
 204 /* That function checks if a bitfield is valid and returns the other bitfield
 205  * nearest match if no exact match where found.
 206  */
 207 static int
 208 get_fan_auto_nearest(struct adm1031_data *data,
 209                      int chan, u8 val, u8 reg, u8 * new_reg)
 210 {
 211         int i;
 212         int first_match = -1, exact_match = -1;
 213         u8 other_reg_val =
 214             (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
 215
 216         if (val == 0) {
 217                 *new_reg = 0;
 218                 return 0;
 219         }
 220
 221         for (i = 0; i < 8; i++) {
 222                 if ((val == (*data->chan_select_table)[i][chan]) &&
 223                     ((*data->chan_select_table)[i][chan ? 0 : 1] ==
 224                      other_reg_val)) {
 225                         /* We found an exact match */
 226                         exact_match = i;
 227                         break;
 228                 } else if (val == (*data->chan_select_table)[i][chan] &&
 229                            first_match == -1) {
 230                         /* Save the first match in case of an exact match has not been
 231                          * found
 232                          */
 233                         first_match = i;
 234                 }
 235         }
 236
 237         if (exact_match >= 0) {
 238                 *new_reg = exact_match;
 239         } else if (first_match >= 0) {
 240                 *new_reg = first_match;
 241         } else {
 242                 return -EINVAL;
 243         }
 244         return 0;
 245 }
 246
 247 static ssize_t show_fan_auto_channel(struct device *dev, char *buf, int nr)
 248 {
 249         struct adm1031_data *data = adm1031_update_device(dev);
 250         return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
 251 }
 252
 253 static ssize_t
 254 set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
 255 {
 256         struct i2c_client *client = to_i2c_client(dev);
 257         struct adm1031_data *data = i2c_get_clientdata(client);
 258         int val = simple_strtol(buf, NULL, 10);
 259         u8 reg;
 260         int ret;
 261         u8 old_fan_mode;
 262
 263         old_fan_mode = data->conf1;
 264
 265         down(&data->update_lock);
 266
 267         if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
 268                 up(&data->update_lock);
 269                 return ret;
 270         }
 271         if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^
 272             (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
 273                 if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
 274                         /* Switch to Auto Fan Mode
 275                          * Save PWM registers
 276                          * Set PWM registers to 33% Both */
 277                         data->old_pwm[0] = data->pwm[0];
 278                         data->old_pwm[1] = data->pwm[1];
 279                         adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
 280                 } else {
 281                         /* Switch to Manual Mode */
 282                         data->pwm[0] = data->old_pwm[0];
 283                         data->pwm[1] = data->old_pwm[1];
 284                         /* Restore PWM registers */
 285                         adm1031_write_value(client, ADM1031_REG_PWM,
 286                                             data->pwm[0] | (data->pwm[1] << 4));
 287                 }
 288         }
 289         data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
 290         adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
 291         up(&data->update_lock);
 292         return count;
 293 }
 294
 295 #define fan_auto_channel_offset(offset)                                         \
 296 static ssize_t show_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr, char *buf)    \
 297 {                                                                               \
 298         return show_fan_auto_channel(dev, buf, offset - 1);                     \
 299 }                                                                               \
 300 static ssize_t set_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr,                \
 301         const char *buf, size_t count)                                          \
 302 {                                                                               \
 303         return set_fan_auto_channel(dev, buf, count, offset - 1);               \
 304 }                                                                               \
 305 static DEVICE_ATTR(auto_fan##offset##_channel, S_IRUGO | S_IWUSR,               \
 306                    show_fan_auto_channel_##offset,                              \
 307                    set_fan_auto_channel_##offset)
 308
 309 fan_auto_channel_offset(1);
 310 fan_auto_channel_offset(2);
 311
 312 /* Auto Temps */
 313 static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
 314 {
 315         struct adm1031_data *data = adm1031_update_device(dev);
 316         return sprintf(buf, "%d\n",
 317                        AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
 318 }
 319 static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
 320 {
 321         struct adm1031_data *data = adm1031_update_device(dev);
 322         return sprintf(buf, "%d\n",
 323                        AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
 324 }
 325 static ssize_t
 326 set_auto_temp_min(struct device *dev, const char *buf, size_t count, int nr)
 327 {
 328         struct i2c_client *client = to_i2c_client(dev);
 329         struct adm1031_data *data = i2c_get_clientdata(client);
 330         int val = simple_strtol(buf, NULL, 10);
 331
 332         down(&data->update_lock);
 333         data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
 334         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
 335                             data->auto_temp[nr]);
 336         up(&data->update_lock);
 337         return count;
 338 }
 339 static ssize_t show_auto_temp_max(struct device *dev, char *buf, int nr)
 340 {
 341         struct adm1031_data *data = adm1031_update_device(dev);
 342         return sprintf(buf, "%d\n",
 343                        AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
 344 }
 345 static ssize_t
 346 set_auto_temp_max(struct device *dev, const char *buf, size_t count, int nr)
 347 {
 348         struct i2c_client *client = to_i2c_client(dev);
 349         struct adm1031_data *data = i2c_get_clientdata(client);
 350         int val = simple_strtol(buf, NULL, 10);
 351
 352         down(&data->update_lock);
 353         data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
 354         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
 355                             data->temp_max[nr]);
 356         up(&data->update_lock);
 357         return count;
 358 }
 359
 360 #define auto_temp_reg(offset)                                                   \
 361 static ssize_t show_auto_temp_##offset##_off (struct device *dev, struct device_attribute *attr, char *buf)     \
 362 {                                                                               \
 363         return show_auto_temp_off(dev, buf, offset - 1);                        \
 364 }                                                                               \
 365 static ssize_t show_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)     \
 366 {                                                                               \
 367         return show_auto_temp_min(dev, buf, offset - 1);                        \
 368 }                                                                               \
 369 static ssize_t show_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)     \
 370 {                                                                               \
 371         return show_auto_temp_max(dev, buf, offset - 1);                        \
 372 }                                                                               \
 373 static ssize_t set_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr,         \
 374                                              const char *buf, size_t count)     \
 375 {                                                                               \
 376         return set_auto_temp_min(dev, buf, count, offset - 1);          \
 377 }                                                                               \
 378 static ssize_t set_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr,         \
 379                                              const char *buf, size_t count)     \
 380 {                                                                               \
 381         return set_auto_temp_max(dev, buf, count, offset - 1);          \
 382 }                                                                               \
 383 static DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO,                            \
 384                    show_auto_temp_##offset##_off, NULL);                        \
 385 static DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR,                  \
 386                    show_auto_temp_##offset##_min, set_auto_temp_##offset##_min);\
 387 static DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR,                  \
 388                    show_auto_temp_##offset##_max, set_auto_temp_##offset##_max)
 389
 390 auto_temp_reg(1);
 391 auto_temp_reg(2);
 392 auto_temp_reg(3);
 393
 394 /* pwm */
 395 static ssize_t show_pwm(struct device *dev, char *buf, int nr)
 396 {
 397         struct adm1031_data *data = adm1031_update_device(dev);
 398         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
 399 }
 400 static ssize_t
 401 set_pwm(struct device *dev, const char *buf, size_t count, int nr)
 402 {
 403         struct i2c_client *client = to_i2c_client(dev);
 404         struct adm1031_data *data = i2c_get_clientdata(client);
 405         int val = simple_strtol(buf, NULL, 10);
 406         int reg;
 407
 408         down(&data->update_lock);
 409         if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
 410             (((val>>4) & 0xf) != 5)) {
 411                 /* In automatic mode, the only PWM accepted is 33% */
 412                 up(&data->update_lock);
 413                 return -EINVAL;
 414         }
 415         data->pwm[nr] = PWM_TO_REG(val);
 416         reg = adm1031_read_value(client, ADM1031_REG_PWM);
 417         adm1031_write_value(client, ADM1031_REG_PWM,
 418                             nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
 419                             : (data->pwm[nr] & 0xf) | (reg & 0xf0));
 420         up(&data->update_lock);
 421         return count;
 422 }
 423
 424 #define pwm_reg(offset)                                                 \
 425 static ssize_t show_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 426 {                                                                       \
 427         return show_pwm(dev, buf, offset - 1);                  \
 428 }                                                                       \
 429 static ssize_t set_pwm_##offset (struct device *dev, struct device_attribute *attr,                     \
 430                                  const char *buf, size_t count)         \
 431 {                                                                       \
 432         return set_pwm(dev, buf, count, offset - 1);            \
 433 }                                                                       \
 434 static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,                      \
 435                    show_pwm_##offset, set_pwm_##offset)
 436
 437 pwm_reg(1);
 438 pwm_reg(2);
 439
 440 /* Fans */
 441
 442 /*
 443  * That function checks the cases where the fan reading is not
 444  * relevant.  It is used to provide 0 as fan reading when the fan is
 445  * not supposed to run
 446  */
 447 static int trust_fan_readings(struct adm1031_data *data, int chan)
 448 {
 449         int res = 0;
 450
 451         if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
 452                 switch (data->conf1 & 0x60) {
 453                 case 0x00:      /* remote temp1 controls fan1 remote temp2 controls fan2 */
 454                         res = data->temp[chan+1] >=
 455                               AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
 456                         break;
 457                 case 0x20:      /* remote temp1 controls both fans */
 458                         res =
 459                             data->temp[1] >=
 460                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
 461                         break;
 462                 case 0x40:      /* remote temp2 controls both fans */
 463                         res =
 464                             data->temp[2] >=
 465                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
 466                         break;
 467                 case 0x60:      /* max controls both fans */
 468                         res =
 469                             data->temp[0] >=
 470                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
 471                             || data->temp[1] >=
 472                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
 473                             || (data->chip_type == adm1031
 474                                 && data->temp[2] >=
 475                                 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
 476                         break;
 477                 }
 478         } else {
 479                 res = data->pwm[chan] > 0;
 480         }
 481         return res;
 482 }
 483
 484
 485 static ssize_t show_fan(struct device *dev, char *buf, int nr)
 486 {
 487         struct adm1031_data *data = adm1031_update_device(dev);
 488         int value;
 489
 490         value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
 491                                  FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
 492         return sprintf(buf, "%d\n", value);
 493 }
 494
 495 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
 496 {
 497         struct adm1031_data *data = adm1031_update_device(dev);
 498         return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
 499 }
 500 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
 501 {
 502         struct adm1031_data *data = adm1031_update_device(dev);
 503         return sprintf(buf, "%d\n",
 504                        FAN_FROM_REG(data->fan_min[nr],
 505                                     FAN_DIV_FROM_REG(data->fan_div[nr])));
 506 }
 507 static ssize_t
 508 set_fan_min(struct device *dev, const char *buf, size_t count, int nr)
 509 {
 510         struct i2c_client *client = to_i2c_client(dev);
 511         struct adm1031_data *data = i2c_get_clientdata(client);
 512         int val = simple_strtol(buf, NULL, 10);
 513
 514         down(&data->update_lock);
 515         if (val) {
 516                 data->fan_min[nr] =
 517                         FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
 518         } else {
 519                 data->fan_min[nr] = 0xff;
 520         }
 521         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
 522         up(&data->update_lock);
 523         return count;
 524 }
 525 static ssize_t
 526 set_fan_div(struct device *dev, const char *buf, size_t count, int nr)
 527 {
 528         struct i2c_client *client = to_i2c_client(dev);
 529         struct adm1031_data *data = i2c_get_clientdata(client);
 530         int val = simple_strtol(buf, NULL, 10);
 531         u8 tmp;
 532         int old_div;
 533         int new_min;
 534
 535         tmp = val == 8 ? 0xc0 :
 536               val == 4 ? 0x80 :
 537               val == 2 ? 0x40 :
 538               val == 1 ? 0x00 :
 539               0xff;
 540         if (tmp == 0xff)
 541                 return -EINVAL;
 542
 543         down(&data->update_lock);
 544         old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
 545         data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
 546         new_min = data->fan_min[nr] * old_div /
 547                 FAN_DIV_FROM_REG(data->fan_div[nr]);
 548         data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
 549         data->fan[nr] = data->fan[nr] * old_div /
 550                 FAN_DIV_FROM_REG(data->fan_div[nr]);
 551
 552         adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
 553                             data->fan_div[nr]);
 554         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
 555                             data->fan_min[nr]);
 556         up(&data->update_lock);
 557         return count;
 558 }
 559
 560 #define fan_offset(offset)                                              \
 561 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 562 {                                                                       \
 563         return show_fan(dev, buf, offset - 1);                  \
 564 }                                                                       \
 565 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)   \
 566 {                                                                       \
 567         return show_fan_min(dev, buf, offset - 1);                      \
 568 }                                                                       \
 569 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf)   \
 570 {                                                                       \
 571         return show_fan_div(dev, buf, offset - 1);                      \
 572 }                                                                       \
 573 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr,               \
 574         const char *buf, size_t count)                                  \
 575 {                                                                       \
 576         return set_fan_min(dev, buf, count, offset - 1);                \
 577 }                                                                       \
 578 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr,               \
 579         const char *buf, size_t count)                                  \
 580 {                                                                       \
 581         return set_fan_div(dev, buf, count, offset - 1);                \
 582 }                                                                       \
 583 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset,     \
 584                    NULL);                                               \
 585 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,                \
 586                    show_fan_##offset##_min, set_fan_##offset##_min);    \
 587 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,                \
 588                    show_fan_##offset##_div, set_fan_##offset##_div);    \
 589 static DEVICE_ATTR(auto_fan##offset##_min_pwm, S_IRUGO | S_IWUSR,       \
 590                    show_pwm_##offset, set_pwm_##offset)
 591
 592 fan_offset(1);
 593 fan_offset(2);
 594
 595
 596 /* Temps */
 597 static ssize_t show_temp(struct device *dev, char *buf, int nr)
 598 {
 599         struct adm1031_data *data = adm1031_update_device(dev);
 600         int ext;
 601         ext = nr == 0 ?
 602             ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
 603             (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
 604         return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
 605 }
 606 static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
 607 {
 608         struct adm1031_data *data = adm1031_update_device(dev);
 609         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
 610 }
 611 static ssize_t show_temp_max(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_max[nr]));
 615 }
 616 static ssize_t show_temp_crit(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_crit[nr]));
 620 }
 621 static ssize_t
 622 set_temp_min(struct device *dev, const char *buf, size_t count, int nr)
 623 {
 624         struct i2c_client *client = to_i2c_client(dev);
 625         struct adm1031_data *data = i2c_get_clientdata(client);
 626         int val;
 627
 628         val = simple_strtol(buf, NULL, 10);
 629         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 630         down(&data->update_lock);
 631         data->temp_min[nr] = TEMP_TO_REG(val);
 632         adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
 633                             data->temp_min[nr]);
 634         up(&data->update_lock);
 635         return count;
 636 }
 637 static ssize_t
 638 set_temp_max(struct device *dev, const char *buf, size_t count, int nr)
 639 {
 640         struct i2c_client *client = to_i2c_client(dev);
 641         struct adm1031_data *data = i2c_get_clientdata(client);
 642         int val;
 643
 644         val = simple_strtol(buf, NULL, 10);
 645         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 646         down(&data->update_lock);
 647         data->temp_max[nr] = TEMP_TO_REG(val);
 648         adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
 649                             data->temp_max[nr]);
 650         up(&data->update_lock);
 651         return count;
 652 }
 653 static ssize_t
 654 set_temp_crit(struct device *dev, const char *buf, size_t count, int nr)
 655 {
 656         struct i2c_client *client = to_i2c_client(dev);
 657         struct adm1031_data *data = i2c_get_clientdata(client);
 658         int val;
 659
 660         val = simple_strtol(buf, NULL, 10);
 661         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
 662         down(&data->update_lock);
 663         data->temp_crit[nr] = TEMP_TO_REG(val);
 664         adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
 665                             data->temp_crit[nr]);
 666         up(&data->update_lock);
 667         return count;
 668 }
 669
 670 #define temp_reg(offset)                                                        \
 671 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf)                \
 672 {                                                                               \
 673         return show_temp(dev, buf, offset - 1);                         \
 674 }                                                                               \
 675 static ssize_t show_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)          \
 676 {                                                                               \
 677         return show_temp_min(dev, buf, offset - 1);                             \
 678 }                                                                               \
 679 static ssize_t show_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)          \
 680 {                                                                               \
 681         return show_temp_max(dev, buf, offset - 1);                             \
 682 }                                                                               \
 683 static ssize_t show_temp_##offset##_crit (struct device *dev, struct device_attribute *attr, char *buf) \
 684 {                                                                               \
 685         return show_temp_crit(dev, buf, offset - 1);                    \
 686 }                                                                               \
 687 static ssize_t set_temp_##offset##_min (struct device *dev, struct device_attribute *attr,                      \
 688                                         const char *buf, size_t count)          \
 689 {                                                                               \
 690         return set_temp_min(dev, buf, count, offset - 1);                       \
 691 }                                                                               \
 692 static ssize_t set_temp_##offset##_max (struct device *dev, struct device_attribute *attr,                      \
 693                                         const char *buf, size_t count)          \
 694 {                                                                               \
 695         return set_temp_max(dev, buf, count, offset - 1);                       \
 696 }                                                                               \
 697 static ssize_t set_temp_##offset##_crit (struct device *dev, struct device_attribute *attr,                     \
 698                                          const char *buf, size_t count)         \
 699 {                                                                               \
 700         return set_temp_crit(dev, buf, count, offset - 1);                      \
 701 }                                                                               \
 702 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset,           \
 703                    NULL);                                                       \
 704 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,                       \
 705                    show_temp_##offset##_min, set_temp_##offset##_min);          \
 706 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,                       \
 707                    show_temp_##offset##_max, set_temp_##offset##_max);          \
 708 static DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR,                      \
 709                    show_temp_##offset##_crit, set_temp_##offset##_crit)
 710
 711 temp_reg(1);
 712 temp_reg(2);
 713 temp_reg(3);
 714
 715 /* Alarms */
 716 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 717 {
 718         struct adm1031_data *data = adm1031_update_device(dev);
 719         return sprintf(buf, "%d\n", data->alarm);
 720 }
 721
 722 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 723
 724
 725 static int adm1031_attach_adapter(struct i2c_adapter *adapter)
 726 {
 727         if (!(adapter->class & I2C_CLASS_HWMON))
 728                 return 0;
 729         return i2c_probe(adapter, &addr_data, adm1031_detect);
 730 }
 731
 732 /* This function is called by i2c_probe */
 733 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
 734 {
 735         struct i2c_client *new_client;
 736         struct adm1031_data *data;
 737         int err = 0;
 738         const char *name = "";
 739
 740         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 741                 goto exit;
 742
 743         if (!(data = kzalloc(sizeof(struct adm1031_data), GFP_KERNEL))) {
 744                 err = -ENOMEM;
 745                 goto exit;
 746         }
 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         data->class_dev = hwmon_device_register(&new_client->dev);
 792         if (IS_ERR(data->class_dev)) {
 793                 err = PTR_ERR(data->class_dev);
 794                 goto exit_detach;
 795         }
 796
 797         device_create_file(&new_client->dev, &dev_attr_fan1_input);
 798         device_create_file(&new_client->dev, &dev_attr_fan1_div);
 799         device_create_file(&new_client->dev, &dev_attr_fan1_min);
 800         device_create_file(&new_client->dev, &dev_attr_pwm1);
 801         device_create_file(&new_client->dev, &dev_attr_auto_fan1_channel);
 802         device_create_file(&new_client->dev, &dev_attr_temp1_input);
 803         device_create_file(&new_client->dev, &dev_attr_temp1_min);
 804         device_create_file(&new_client->dev, &dev_attr_temp1_max);
 805         device_create_file(&new_client->dev, &dev_attr_temp1_crit);
 806         device_create_file(&new_client->dev, &dev_attr_temp2_input);
 807         device_create_file(&new_client->dev, &dev_attr_temp2_min);
 808         device_create_file(&new_client->dev, &dev_attr_temp2_max);
 809         device_create_file(&new_client->dev, &dev_attr_temp2_crit);
 810
 811         device_create_file(&new_client->dev, &dev_attr_auto_temp1_off);
 812         device_create_file(&new_client->dev, &dev_attr_auto_temp1_min);
 813         device_create_file(&new_client->dev, &dev_attr_auto_temp1_max);
 814
 815         device_create_file(&new_client->dev, &dev_attr_auto_temp2_off);
 816         device_create_file(&new_client->dev, &dev_attr_auto_temp2_min);
 817         device_create_file(&new_client->dev, &dev_attr_auto_temp2_max);
 818
 819         device_create_file(&new_client->dev, &dev_attr_auto_fan1_min_pwm);
 820
 821         device_create_file(&new_client->dev, &dev_attr_alarms);
 822
 823         if (kind == adm1031) {
 824                 device_create_file(&new_client->dev, &dev_attr_fan2_input);
 825                 device_create_file(&new_client->dev, &dev_attr_fan2_div);
 826                 device_create_file(&new_client->dev, &dev_attr_fan2_min);
 827                 device_create_file(&new_client->dev, &dev_attr_pwm2);
 828                 device_create_file(&new_client->dev,
 829                                    &dev_attr_auto_fan2_channel);
 830                 device_create_file(&new_client->dev, &dev_attr_temp3_input);
 831                 device_create_file(&new_client->dev, &dev_attr_temp3_min);
 832                 device_create_file(&new_client->dev, &dev_attr_temp3_max);
 833                 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
 834                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_off);
 835                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_min);
 836                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_max);
 837                 device_create_file(&new_client->dev, &dev_attr_auto_fan2_min_pwm);
 838         }
 839
 840         return 0;
 841
 842 exit_detach:
 843         i2c_detach_client(new_client);
 844 exit_free:
 845         kfree(data);
 846 exit:
 847         return err;
 848 }
 849
 850 static int adm1031_detach_client(struct i2c_client *client)
 851 {
 852         struct adm1031_data *data = i2c_get_clientdata(client);
 853         int ret;
 854
 855         hwmon_device_unregister(data->class_dev);
 856         if ((ret = i2c_detach_client(client)) != 0) {
 857                 return ret;
 858         }
 859         kfree(data);
 860         return 0;
 861 }
 862
 863 static void adm1031_init_client(struct i2c_client *client)
 864 {
 865         unsigned int read_val;
 866         unsigned int mask;
 867         struct adm1031_data *data = i2c_get_clientdata(client);
 868
 869         mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
 870         if (data->chip_type == adm1031) {
 871                 mask |= (ADM1031_CONF2_PWM2_ENABLE |
 872                         ADM1031_CONF2_TACH2_ENABLE);
 873         }
 874         /* Initialize the ADM1031 chip (enables fan speed reading ) */
 875         read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
 876         if ((read_val | mask) != read_val) {
 877             adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
 878         }
 879
 880         read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
 881         if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
 882             adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
 883                                 ADM1031_CONF1_MONITOR_ENABLE);
 884         }
 885
 886 }
 887
 888 static struct adm1031_data *adm1031_update_device(struct device *dev)
 889 {
 890         struct i2c_client *client = to_i2c_client(dev);
 891         struct adm1031_data *data = i2c_get_clientdata(client);
 892         int chan;
 893
 894         down(&data->update_lock);
 895
 896         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 897             || !data->valid) {
 898
 899                 dev_dbg(&client->dev, "Starting adm1031 update\n");
 900                 for (chan = 0;
 901                      chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
 902                         u8 oldh, newh;
 903
 904                         oldh =
 905                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
 906                         data->ext_temp[chan] =
 907                             adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
 908                         newh =
 909                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
 910                         if (newh != oldh) {
 911                                 data->ext_temp[chan] =
 912                                     adm1031_read_value(client,
 913                                                        ADM1031_REG_EXT_TEMP);
 914 #ifdef DEBUG
 915                                 oldh =
 916                                     adm1031_read_value(client,
 917                                                        ADM1031_REG_TEMP(chan));
 918
 919                                 /* oldh is actually newer */
 920                                 if (newh != oldh)
 921                                         dev_warn(&client->dev,
 922                                                  "Remote temperature may be "
 923                                                  "wrong.\n");
 924 #endif
 925                         }
 926                         data->temp[chan] = newh;
 927
 928                         data->temp_min[chan] =
 929                             adm1031_read_value(client,
 930                                                ADM1031_REG_TEMP_MIN(chan));
 931                         data->temp_max[chan] =
 932                             adm1031_read_value(client,
 933                                                ADM1031_REG_TEMP_MAX(chan));
 934                         data->temp_crit[chan] =
 935                             adm1031_read_value(client,
 936                                                ADM1031_REG_TEMP_CRIT(chan));
 937                         data->auto_temp[chan] =
 938                             adm1031_read_value(client,
 939                                                ADM1031_REG_AUTO_TEMP(chan));
 940
 941                 }
 942
 943                 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
 944                 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
 945
 946                 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
 947                              | (adm1031_read_value(client, ADM1031_REG_STATUS(1))
 948                                 << 8);
 949                 if (data->chip_type == adm1030) {
 950                         data->alarm &= 0xc0ff;
 951                 }
 952
 953                 for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
 954                         data->fan_div[chan] =
 955                             adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
 956                         data->fan_min[chan] =
 957                             adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
 958                         data->fan[chan] =
 959                             adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
 960                         data->pwm[chan] =
 961                             0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
 962                                    (4*chan));
 963                 }
 964                 data->last_updated = jiffies;
 965                 data->valid = 1;
 966         }
 967
 968         up(&data->update_lock);
 969
 970         return data;
 971 }
 972
 973 static int __init sensors_adm1031_init(void)
 974 {
 975         return i2c_add_driver(&adm1031_driver);
 976 }
 977
 978 static void __exit sensors_adm1031_exit(void)
 979 {
 980         i2c_del_driver(&adm1031_driver);
 981 }
 982
 983 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
 984 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
 985 MODULE_LICENSE("GPL");
 986
 987 module_init(sensors_adm1031_init);
 988 module_exit(sensors_adm1031_exit);