err.no Git - linux-2.6/blob - drivers/i2c/chips/adm9240.c

   1 /*
   2  * adm9240.c    Part of lm_sensors, Linux kernel modules for hardware
   3  *              monitoring
   4  *
   5  * Copyright (C) 1999   Frodo Looijaard <frodol@dds.nl>
   6  *                      Philip Edelbrock <phil@netroedge.com>
   7  * Copyright (C) 2003   Michiel Rook <michiel@grendelproject.nl>
   8  * Copyright (C) 2005   Grant Coady <gcoady@gmail.com> with valuable
   9  *                              guidance from Jean Delvare
  10  *
  11  * Driver supports      Analog Devices          ADM9240
  12  *                      Dallas Semiconductor    DS1780
  13  *                      National Semiconductor  LM81
  14  *
  15  * ADM9240 is the reference, DS1780 and LM81 are register compatibles
  16  *
  17  * Voltage      Six inputs are scaled by chip, VID also reported
  18  * Temperature  Chip temperature to 0.5'C, maximum and max_hysteris
  19  * Fans         2 fans, low speed alarm, automatic fan clock divider
  20  * Alarms       16-bit map of active alarms
  21  * Analog Out   0..1250 mV output
  22  *
  23  * Chassis Intrusion: clear CI latch with 'echo 1 > chassis_clear'
  24  *
  25  * Test hardware: Intel SE440BX-2 desktop motherboard --Grant
  26  *
  27  * LM81 extended temp reading not implemented
  28  *
  29  * This program is free software; you can redistribute it and/or modify
  30  * it under the terms of the GNU General Public License as published by
  31  * the Free Software Foundation; either version 2 of the License, or
  32  * (at your option) any later version.
  33  *
  34  * This program is distributed in the hope that it will be useful,
  35  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  36  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  37  * GNU General Public License for more details.
  38  *
  39  * You should have received a copy of the GNU General Public License
  40  * along with this program; if not, write to the Free Software
  41  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  42  */
  43
  44 #include <linux/init.h>
  45 #include <linux/module.h>
  46 #include <linux/slab.h>
  47 #include <linux/i2c.h>
  48 #include <linux/i2c-sensor.h>
  49 #include <linux/i2c-vid.h>
  50
  51 /* Addresses to scan */
  52 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
  53                                         I2C_CLIENT_END };
  54
  55 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  56
  57 /* Insmod parameters */
  58 SENSORS_INSMOD_3(adm9240, ds1780, lm81);
  59
  60 /* ADM9240 registers */
  61 #define ADM9240_REG_MAN_ID              0x3e
  62 #define ADM9240_REG_DIE_REV             0x3f
  63 #define ADM9240_REG_CONFIG              0x40
  64
  65 #define ADM9240_REG_IN(nr)              (0x20 + (nr))   /* 0..5 */
  66 #define ADM9240_REG_IN_MAX(nr)          (0x2b + (nr) * 2)
  67 #define ADM9240_REG_IN_MIN(nr)          (0x2c + (nr) * 2)
  68 #define ADM9240_REG_FAN(nr)             (0x28 + (nr))   /* 0..1 */
  69 #define ADM9240_REG_FAN_MIN(nr)         (0x3b + (nr))
  70 #define ADM9240_REG_INT(nr)             (0x41 + (nr))
  71 #define ADM9240_REG_INT_MASK(nr)        (0x43 + (nr))
  72 #define ADM9240_REG_TEMP                0x27
  73 #define ADM9240_REG_TEMP_HIGH           0x39
  74 #define ADM9240_REG_TEMP_HYST           0x3a
  75 #define ADM9240_REG_ANALOG_OUT          0x19
  76 #define ADM9240_REG_CHASSIS_CLEAR       0x46
  77 #define ADM9240_REG_VID_FAN_DIV         0x47
  78 #define ADM9240_REG_I2C_ADDR            0x48
  79 #define ADM9240_REG_VID4                0x49
  80 #define ADM9240_REG_TEMP_CONF           0x4b
  81
  82 /* generalised scaling with integer rounding */
  83 static inline int SCALE(long val, int mul, int div)
  84 {
  85         if (val < 0)
  86                 return (val * mul - div / 2) / div;
  87         else
  88                 return (val * mul + div / 2) / div;
  89 }
  90
  91 /* adm9240 internally scales voltage measurements */
  92 static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
  93
  94 static inline unsigned int IN_FROM_REG(u8 reg, int n)
  95 {
  96         return SCALE(reg, nom_mv[n], 192);
  97 }
  98
  99 static inline u8 IN_TO_REG(unsigned long val, int n)
 100 {
 101         return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
 102 }
 103
 104 /* temperature range: -40..125, 127 disables temperature alarm */
 105 static inline s8 TEMP_TO_REG(long val)
 106 {
 107         return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127);
 108 }
 109
 110 /* two fans, each with low fan speed limit */
 111 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
 112 {
 113         if (!reg) /* error */
 114                 return -1;
 115
 116         if (reg == 255)
 117                 return 0;
 118
 119         return SCALE(1350000, 1, reg * div);
 120 }
 121
 122 /* analog out 0..1250mV */
 123 static inline u8 AOUT_TO_REG(unsigned long val)
 124 {
 125         return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255);
 126 }
 127
 128 static inline unsigned int AOUT_FROM_REG(u8 reg)
 129 {
 130         return SCALE(reg, 1250, 255);
 131 }
 132
 133 static int adm9240_attach_adapter(struct i2c_adapter *adapter);
 134 static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind);
 135 static void adm9240_init_client(struct i2c_client *client);
 136 static int adm9240_detach_client(struct i2c_client *client);
 137 static struct adm9240_data *adm9240_update_device(struct device *dev);
 138
 139 /* driver data */
 140 static struct i2c_driver adm9240_driver = {
 141         .owner          = THIS_MODULE,
 142         .name           = "adm9240",
 143         .id             = I2C_DRIVERID_ADM9240,
 144         .flags          = I2C_DF_NOTIFY,
 145         .attach_adapter = adm9240_attach_adapter,
 146         .detach_client  = adm9240_detach_client,
 147 };
 148
 149 /* per client data */
 150 struct adm9240_data {
 151         enum chips type;
 152         struct i2c_client client;
 153         struct semaphore update_lock;
 154         char valid;
 155         unsigned long last_updated_measure;
 156         unsigned long last_updated_config;
 157
 158         u8 in[6];               /* ro   in0_input */
 159         u8 in_max[6];           /* rw   in0_max */
 160         u8 in_min[6];           /* rw   in0_min */
 161         u8 fan[2];              /* ro   fan1_input */
 162         u8 fan_min[2];          /* rw   fan1_min */
 163         u8 fan_div[2];          /* rw   fan1_div, read-only accessor */
 164         s16 temp;               /* ro   temp1_input, 9-bit sign-extended */
 165         s8 temp_high;           /* rw   temp1_max */
 166         s8 temp_hyst;           /* rw   temp1_max_hyst */
 167         u16 alarms;             /* ro   alarms */
 168         u8 aout;                /* rw   aout_output */
 169         u8 vid;                 /* ro   vid */
 170         u8 vrm;                 /* --   vrm set on startup, no accessor */
 171 };
 172
 173 /* i2c byte read/write interface */
 174 static int adm9240_read_value(struct i2c_client *client, u8 reg)
 175 {
 176         return i2c_smbus_read_byte_data(client, reg);
 177 }
 178
 179 static int adm9240_write_value(struct i2c_client *client, u8 reg, u8 value)
 180 {
 181         return i2c_smbus_write_byte_data(client, reg, value);
 182 }
 183
 184 /*** sysfs accessors ***/
 185
 186 /* temperature */
 187 #define show_temp(value, scale)                                 \
 188 static ssize_t show_##value(struct device *dev, char *buf)      \
 189 {                                                               \
 190         struct adm9240_data *data = adm9240_update_device(dev); \
 191         return sprintf(buf, "%d\n", data->value * scale);       \
 192 }
 193 show_temp(temp_high, 1000);
 194 show_temp(temp_hyst, 1000);
 195 show_temp(temp, 500); /* 0.5'C per bit */
 196
 197 #define set_temp(value, reg)                                    \
 198 static ssize_t set_##value(struct device *dev, const char *buf, \
 199                 size_t count)                                   \
 200 {                                                               \
 201         struct i2c_client *client = to_i2c_client(dev);         \
 202         struct adm9240_data *data = adm9240_update_device(dev); \
 203         long temp = simple_strtoul(buf, NULL, 10);              \
 204                                                                 \
 205         down(&data->update_lock);                               \
 206         data->value = TEMP_TO_REG(temp);                        \
 207         adm9240_write_value(client, reg, data->value);          \
 208         up(&data->update_lock);                                 \
 209         return count;                                           \
 210 }
 211
 212 set_temp(temp_high, ADM9240_REG_TEMP_HIGH);
 213 set_temp(temp_hyst, ADM9240_REG_TEMP_HYST);
 214
 215 static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
 216                 show_temp_high, set_temp_high);
 217 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
 218                 show_temp_hyst, set_temp_hyst);
 219 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
 220
 221 /* voltage */
 222 static ssize_t show_in(struct device *dev, char *buf, int nr)
 223 {
 224         struct adm9240_data *data = adm9240_update_device(dev);
 225         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
 226 }
 227
 228 static ssize_t show_in_min(struct device *dev, char *buf, int nr)
 229 {
 230         struct adm9240_data *data = adm9240_update_device(dev);
 231         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
 232 }
 233
 234 static ssize_t show_in_max(struct device *dev, char *buf, int nr)
 235 {
 236         struct adm9240_data *data = adm9240_update_device(dev);
 237         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
 238 }
 239
 240 static ssize_t set_in_min(struct device *dev, const char *buf,
 241                 size_t count, int nr)
 242 {
 243         struct i2c_client *client = to_i2c_client(dev);
 244         struct adm9240_data *data = i2c_get_clientdata(client);
 245         unsigned long val = simple_strtoul(buf, NULL, 10);
 246
 247         down(&data->update_lock);
 248         data->in_min[nr] = IN_TO_REG(val, nr);
 249         adm9240_write_value(client, ADM9240_REG_IN_MIN(nr), data->in_min[nr]);
 250         up(&data->update_lock);
 251         return count;
 252 }
 253
 254 static ssize_t set_in_max(struct device *dev, const char *buf,
 255                 size_t count, int nr)
 256 {
 257         struct i2c_client *client = to_i2c_client(dev);
 258         struct adm9240_data *data = i2c_get_clientdata(client);
 259         unsigned long val = simple_strtoul(buf, NULL, 10);
 260
 261         down(&data->update_lock);
 262         data->in_max[nr] = IN_TO_REG(val, nr);
 263         adm9240_write_value(client, ADM9240_REG_IN_MAX(nr), data->in_max[nr]);
 264         up(&data->update_lock);
 265         return count;
 266 }
 267
 268 #define show_in_offset(offset)                                          \
 269 static ssize_t show_in##offset(struct device *dev, char *buf)           \
 270 {                                                                       \
 271         return show_in(dev, buf, offset);                               \
 272 }                                                                       \
 273 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); \
 274 static ssize_t show_in##offset##_min(struct device *dev, char *buf)     \
 275 {                                                                       \
 276         return show_in_min(dev, buf, offset);                           \
 277 }                                                                       \
 278 static ssize_t show_in##offset##_max(struct device *dev, char *buf)     \
 279 {                                                                       \
 280         return show_in_max(dev, buf, offset);                           \
 281 }                                                                       \
 282 static ssize_t                                                          \
 283 set_in##offset##_min(struct device *dev, const char *buf, size_t count) \
 284 {                                                                       \
 285         return set_in_min(dev, buf, count, offset);                     \
 286 }                                                                       \
 287 static ssize_t                                                          \
 288 set_in##offset##_max(struct device *dev, const char *buf, size_t count) \
 289 {                                                                       \
 290         return set_in_max(dev, buf, count, offset);                     \
 291 }                                                                       \
 292 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,                 \
 293                 show_in##offset##_min, set_in##offset##_min);           \
 294 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,                 \
 295                 show_in##offset##_max, set_in##offset##_max);
 296
 297 show_in_offset(0);
 298 show_in_offset(1);
 299 show_in_offset(2);
 300 show_in_offset(3);
 301 show_in_offset(4);
 302 show_in_offset(5);
 303
 304 /* fans */
 305 static ssize_t show_fan(struct device *dev, char *buf, int nr)
 306 {
 307         struct adm9240_data *data = adm9240_update_device(dev);
 308         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 309                                 1 << data->fan_div[nr]));
 310 }
 311
 312 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
 313 {
 314         struct adm9240_data *data = adm9240_update_device(dev);
 315         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 316                                 1 << data->fan_div[nr]));
 317 }
 318
 319 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
 320 {
 321         struct adm9240_data *data = adm9240_update_device(dev);
 322         return sprintf(buf, "%d\n", 1 << data->fan_div[nr]);
 323 }
 324
 325 /* write new fan div, callers must hold data->update_lock */
 326 static void adm9240_write_fan_div(struct i2c_client *client, int nr,
 327                 u8 fan_div)
 328 {
 329         u8 reg, old, shift = (nr + 2) * 2;
 330
 331         reg = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV);
 332         old = (reg >> shift) & 3;
 333         reg &= ~(3 << shift);
 334         reg |= (fan_div << shift);
 335         adm9240_write_value(client, ADM9240_REG_VID_FAN_DIV, reg);
 336         dev_dbg(&client->dev, "fan%d clock divider changed from %u "
 337                         "to %u\n", nr + 1, 1 << old, 1 << fan_div);
 338 }
 339
 340 /*
 341  * set fan speed low limit:
 342  *
 343  * - value is zero: disable fan speed low limit alarm
 344  *
 345  * - value is below fan speed measurement range: enable fan speed low
 346  *   limit alarm to be asserted while fan speed too slow to measure
 347  *
 348  * - otherwise: select fan clock divider to suit fan speed low limit,
 349  *   measurement code may adjust registers to ensure fan speed reading
 350  */
 351 static ssize_t set_fan_min(struct device *dev, const char *buf,
 352                 size_t count, int nr)
 353 {
 354         struct i2c_client *client = to_i2c_client(dev);
 355         struct adm9240_data *data = i2c_get_clientdata(client);
 356         unsigned long val = simple_strtoul(buf, NULL, 10);
 357         u8 new_div;
 358
 359         down(&data->update_lock);
 360
 361         if (!val) {
 362                 data->fan_min[nr] = 255;
 363                 new_div = data->fan_div[nr];
 364
 365                 dev_dbg(&client->dev, "fan%u low limit set disabled\n",
 366                                 nr + 1);
 367
 368         } else if (val < 1350000 / (8 * 254)) {
 369                 new_div = 3;
 370                 data->fan_min[nr] = 254;
 371
 372                 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
 373                                 nr + 1, FAN_FROM_REG(254, 1 << new_div));
 374
 375         } else {
 376                 unsigned int new_min = 1350000 / val;
 377
 378                 new_div = 0;
 379                 while (new_min > 192 && new_div < 3) {
 380                         new_div++;
 381                         new_min /= 2;
 382                 }
 383                 if (!new_min) /* keep > 0 */
 384                         new_min++;
 385
 386                 data->fan_min[nr] = new_min;
 387
 388                 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
 389                                 nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
 390         }
 391
 392         if (new_div != data->fan_div[nr]) {
 393                 data->fan_div[nr] = new_div;
 394                 adm9240_write_fan_div(client, nr, new_div);
 395         }
 396         adm9240_write_value(client, ADM9240_REG_FAN_MIN(nr),
 397                         data->fan_min[nr]);
 398
 399         up(&data->update_lock);
 400         return count;
 401 }
 402
 403 #define show_fan_offset(offset)                                         \
 404 static ssize_t show_fan_##offset (struct device *dev, char *buf)        \
 405 {                                                                       \
 406 return show_fan(dev, buf, offset - 1);                                  \
 407 }                                                                       \
 408 static ssize_t show_fan_##offset##_div (struct device *dev, char *buf)  \
 409 {                                                                       \
 410 return show_fan_div(dev, buf, offset - 1);                              \
 411 }                                                                       \
 412 static ssize_t show_fan_##offset##_min (struct device *dev, char *buf)  \
 413 {                                                                       \
 414 return show_fan_min(dev, buf, offset - 1);                              \
 415 }                                                                       \
 416 static ssize_t set_fan_##offset##_min (struct device *dev,              \
 417 const char *buf, size_t count)                                          \
 418 {                                                                       \
 419 return set_fan_min(dev, buf, count, offset - 1);                        \
 420 }                                                                       \
 421 static DEVICE_ATTR(fan##offset##_input, S_IRUGO,                        \
 422                 show_fan_##offset, NULL);                               \
 423 static DEVICE_ATTR(fan##offset##_div, S_IRUGO,                          \
 424                 show_fan_##offset##_div, NULL);                         \
 425 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,                \
 426                 show_fan_##offset##_min, set_fan_##offset##_min);
 427
 428 show_fan_offset(1);
 429 show_fan_offset(2);
 430
 431 /* alarms */
 432 static ssize_t show_alarms(struct device *dev, char *buf)
 433 {
 434         struct adm9240_data *data = adm9240_update_device(dev);
 435         return sprintf(buf, "%u\n", data->alarms);
 436 }
 437 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 438
 439 /* vid */
 440 static ssize_t show_vid(struct device *dev, char *buf)
 441 {
 442         struct adm9240_data *data = adm9240_update_device(dev);
 443         return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
 444 }
 445 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
 446
 447 /* analog output */
 448 static ssize_t show_aout(struct device *dev, char *buf)
 449 {
 450         struct adm9240_data *data = adm9240_update_device(dev);
 451         return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
 452 }
 453
 454 static ssize_t set_aout(struct device *dev, const char *buf, size_t count)
 455 {
 456         struct i2c_client *client = to_i2c_client(dev);
 457         struct adm9240_data *data = i2c_get_clientdata(client);
 458         unsigned long val = simple_strtol(buf, NULL, 10);
 459
 460         down(&data->update_lock);
 461         data->aout = AOUT_TO_REG(val);
 462         adm9240_write_value(client, ADM9240_REG_ANALOG_OUT, data->aout);
 463         up(&data->update_lock);
 464         return count;
 465 }
 466 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
 467
 468 /* chassis_clear */
 469 static ssize_t chassis_clear(struct device *dev, const char *buf, size_t count)
 470 {
 471         struct i2c_client *client = to_i2c_client(dev);
 472         unsigned long val = simple_strtol(buf, NULL, 10);
 473
 474         if (val == 1) {
 475                 adm9240_write_value(client, ADM9240_REG_CHASSIS_CLEAR, 0x80);
 476                 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
 477         }
 478         return count;
 479 }
 480 static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear);
 481
 482
 483 /*** sensor chip detect and driver install ***/
 484
 485 static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind)
 486 {
 487         struct i2c_client *new_client;
 488         struct adm9240_data *data;
 489         int err = 0;
 490         const char *name = "";
 491         u8 man_id, die_rev;
 492
 493         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 494                 goto exit;
 495
 496         if (!(data = kmalloc(sizeof(struct adm9240_data), GFP_KERNEL))) {
 497                 err = -ENOMEM;
 498                 goto exit;
 499         }
 500         memset(data, 0, sizeof(struct adm9240_data));
 501
 502         new_client = &data->client;
 503         i2c_set_clientdata(new_client, data);
 504         new_client->addr = address;
 505         new_client->adapter = adapter;
 506         new_client->driver = &adm9240_driver;
 507         new_client->flags = 0;
 508
 509         if (kind == 0) {
 510                 kind = adm9240;
 511         }
 512
 513         if (kind < 0) {
 514
 515                 /* verify chip: reg address should match i2c address */
 516                 if (adm9240_read_value(new_client, ADM9240_REG_I2C_ADDR)
 517                                 != address) {
 518                         dev_err(&adapter->dev, "detect fail: address match, "
 519                                         "0x%02x\n", address);
 520                         goto exit_free;
 521                 }
 522
 523                 /* check known chip manufacturer */
 524                 man_id = adm9240_read_value(new_client, ADM9240_REG_MAN_ID);
 525
 526                 if (man_id == 0x23) {
 527                         kind = adm9240;
 528                 } else if (man_id == 0xda) {
 529                         kind = ds1780;
 530                 } else if (man_id == 0x01) {
 531                         kind = lm81;
 532                 } else {
 533                         dev_err(&adapter->dev, "detect fail: unknown manuf, "
 534                                         "0x%02x\n", man_id);
 535                         goto exit_free;
 536                 }
 537
 538                 /* successful detect, print chip info */
 539                 die_rev = adm9240_read_value(new_client, ADM9240_REG_DIE_REV);
 540                 dev_info(&adapter->dev, "found %s revision %u\n",
 541                                 man_id == 0x23 ? "ADM9240" :
 542                                 man_id == 0xda ? "DS1780" : "LM81", die_rev);
 543         }
 544
 545         /* either forced or detected chip kind */
 546         if (kind == adm9240) {
 547                 name = "adm9240";
 548         } else if (kind == ds1780) {
 549                 name = "ds1780";
 550         } else if (kind == lm81) {
 551                 name = "lm81";
 552         }
 553
 554         /* fill in the remaining client fields and attach */
 555         strlcpy(new_client->name, name, I2C_NAME_SIZE);
 556         data->type = kind;
 557         init_MUTEX(&data->update_lock);
 558
 559         if ((err = i2c_attach_client(new_client)))
 560                 goto exit_free;
 561
 562         adm9240_init_client(new_client);
 563
 564         /* populate sysfs filesystem */
 565         device_create_file(&new_client->dev, &dev_attr_in0_input);
 566         device_create_file(&new_client->dev, &dev_attr_in0_min);
 567         device_create_file(&new_client->dev, &dev_attr_in0_max);
 568         device_create_file(&new_client->dev, &dev_attr_in1_input);
 569         device_create_file(&new_client->dev, &dev_attr_in1_min);
 570         device_create_file(&new_client->dev, &dev_attr_in1_max);
 571         device_create_file(&new_client->dev, &dev_attr_in2_input);
 572         device_create_file(&new_client->dev, &dev_attr_in2_min);
 573         device_create_file(&new_client->dev, &dev_attr_in2_max);
 574         device_create_file(&new_client->dev, &dev_attr_in3_input);
 575         device_create_file(&new_client->dev, &dev_attr_in3_min);
 576         device_create_file(&new_client->dev, &dev_attr_in3_max);
 577         device_create_file(&new_client->dev, &dev_attr_in4_input);
 578         device_create_file(&new_client->dev, &dev_attr_in4_min);
 579         device_create_file(&new_client->dev, &dev_attr_in4_max);
 580         device_create_file(&new_client->dev, &dev_attr_in5_input);
 581         device_create_file(&new_client->dev, &dev_attr_in5_min);
 582         device_create_file(&new_client->dev, &dev_attr_in5_max);
 583         device_create_file(&new_client->dev, &dev_attr_temp1_max);
 584         device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
 585         device_create_file(&new_client->dev, &dev_attr_temp1_input);
 586         device_create_file(&new_client->dev, &dev_attr_fan1_input);
 587         device_create_file(&new_client->dev, &dev_attr_fan1_div);
 588         device_create_file(&new_client->dev, &dev_attr_fan1_min);
 589         device_create_file(&new_client->dev, &dev_attr_fan2_input);
 590         device_create_file(&new_client->dev, &dev_attr_fan2_div);
 591         device_create_file(&new_client->dev, &dev_attr_fan2_min);
 592         device_create_file(&new_client->dev, &dev_attr_alarms);
 593         device_create_file(&new_client->dev, &dev_attr_aout_output);
 594         device_create_file(&new_client->dev, &dev_attr_chassis_clear);
 595         device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
 596
 597         return 0;
 598 exit_free:
 599         kfree(new_client);
 600 exit:
 601         return err;
 602 }
 603
 604 static int adm9240_attach_adapter(struct i2c_adapter *adapter)
 605 {
 606         if (!(adapter->class & I2C_CLASS_HWMON))
 607                 return 0;
 608         return i2c_detect(adapter, &addr_data, adm9240_detect);
 609 }
 610
 611 static int adm9240_detach_client(struct i2c_client *client)
 612 {
 613         int err;
 614
 615         if ((err = i2c_detach_client(client))) {
 616                 dev_err(&client->dev, "Client deregistration failed, "
 617                                 "client not detached.\n");
 618                 return err;
 619         }
 620
 621         kfree(i2c_get_clientdata(client));
 622         return 0;
 623 }
 624
 625 static void adm9240_init_client(struct i2c_client *client)
 626 {
 627         struct adm9240_data *data = i2c_get_clientdata(client);
 628         u8 conf = adm9240_read_value(client, ADM9240_REG_CONFIG);
 629         u8 mode = adm9240_read_value(client, ADM9240_REG_TEMP_CONF) & 3;
 630
 631         data->vrm = i2c_which_vrm(); /* need this to report vid as mV */
 632
 633         dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
 634                         data->vrm % 10);
 635
 636         if (conf & 1) { /* measurement cycle running: report state */
 637
 638                 dev_info(&client->dev, "status: config 0x%02x mode %u\n",
 639                                 conf, mode);
 640
 641         } else { /* cold start: open limits before starting chip */
 642                 int i;
 643
 644                 for (i = 0; i < 6; i++)
 645                 {
 646                         adm9240_write_value(client,
 647                                         ADM9240_REG_IN_MIN(i), 0);
 648                         adm9240_write_value(client,
 649                                         ADM9240_REG_IN_MAX(i), 255);
 650                 }
 651                 adm9240_write_value(client, ADM9240_REG_FAN_MIN(0), 255);
 652                 adm9240_write_value(client, ADM9240_REG_FAN_MIN(1), 255);
 653                 adm9240_write_value(client, ADM9240_REG_TEMP_HIGH, 127);
 654                 adm9240_write_value(client, ADM9240_REG_TEMP_HYST, 127);
 655
 656                 /* start measurement cycle */
 657                 adm9240_write_value(client, ADM9240_REG_CONFIG, 1);
 658
 659                 dev_info(&client->dev, "cold start: config was 0x%02x "
 660                                 "mode %u\n", conf, mode);
 661         }
 662 }
 663
 664 static struct adm9240_data *adm9240_update_device(struct device *dev)
 665 {
 666         struct i2c_client *client = to_i2c_client(dev);
 667         struct adm9240_data *data = i2c_get_clientdata(client);
 668         int i;
 669
 670         down(&data->update_lock);
 671
 672         /* minimum measurement cycle: 1.75 seconds */
 673         if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
 674                         || !data->valid) {
 675
 676                 for (i = 0; i < 6; i++) /* read voltages */
 677                 {
 678                         data->in[i] = adm9240_read_value(client,
 679                                         ADM9240_REG_IN(i));
 680                 }
 681                 data->alarms = adm9240_read_value(client,
 682                                         ADM9240_REG_INT(0)) |
 683                                         adm9240_read_value(client,
 684                                         ADM9240_REG_INT(1)) << 8;
 685
 686                 /* read temperature: assume temperature changes less than
 687                  * 0.5'C per two measurement cycles thus ignore possible
 688                  * but unlikely aliasing error on lsb reading. --Grant */
 689                 data->temp = ((adm9240_read_value(client,
 690                                         ADM9240_REG_TEMP) << 8) |
 691                                         adm9240_read_value(client,
 692                                         ADM9240_REG_TEMP_CONF)) / 128;
 693
 694                 for (i = 0; i < 2; i++) /* read fans */
 695                 {
 696                         data->fan[i] = adm9240_read_value(client,
 697                                         ADM9240_REG_FAN(i));
 698
 699                         /* adjust fan clock divider on overflow */
 700                         if (data->valid && data->fan[i] == 255 &&
 701                                         data->fan_div[i] < 3) {
 702
 703                                 adm9240_write_fan_div(client, i,
 704                                                 ++data->fan_div[i]);
 705
 706                                 /* adjust fan_min if active, but not to 0 */
 707                                 if (data->fan_min[i] < 255 &&
 708                                                 data->fan_min[i] >= 2)
 709                                         data->fan_min[i] /= 2;
 710                         }
 711                 }
 712                 data->last_updated_measure = jiffies;
 713         }
 714
 715         /* minimum config reading cycle: 300 seconds */
 716         if (time_after(jiffies, data->last_updated_config + (HZ * 300))
 717                         || !data->valid) {
 718
 719                 for (i = 0; i < 6; i++)
 720                 {
 721                         data->in_min[i] = adm9240_read_value(client,
 722                                         ADM9240_REG_IN_MIN(i));
 723                         data->in_max[i] = adm9240_read_value(client,
 724                                         ADM9240_REG_IN_MAX(i));
 725                 }
 726                 for (i = 0; i < 2; i++)
 727                 {
 728                         data->fan_min[i] = adm9240_read_value(client,
 729                                         ADM9240_REG_FAN_MIN(i));
 730                 }
 731                 data->temp_high = adm9240_read_value(client,
 732                                 ADM9240_REG_TEMP_HIGH);
 733                 data->temp_hyst = adm9240_read_value(client,
 734                                 ADM9240_REG_TEMP_HYST);
 735
 736                 /* read fan divs and 5-bit VID */
 737                 i = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV);
 738                 data->fan_div[0] = (i >> 4) & 3;
 739                 data->fan_div[1] = (i >> 6) & 3;
 740                 data->vid = i & 0x0f;
 741                 data->vid |= (adm9240_read_value(client,
 742                                         ADM9240_REG_VID4) & 1) << 4;
 743                 /* read analog out */
 744                 data->aout = adm9240_read_value(client,
 745                                 ADM9240_REG_ANALOG_OUT);
 746
 747                 data->last_updated_config = jiffies;
 748                 data->valid = 1;
 749         }
 750         up(&data->update_lock);
 751         return data;
 752 }
 753
 754 static int __init sensors_adm9240_init(void)
 755 {
 756         return i2c_add_driver(&adm9240_driver);
 757 }
 758
 759 static void __exit sensors_adm9240_exit(void)
 760 {
 761         i2c_del_driver(&adm9240_driver);
 762 }
 763
 764 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
 765                 "Grant Coady <gcoady@gmail.com> and others");
 766 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
 767 MODULE_LICENSE("GPL");
 768
 769 module_init(sensors_adm9240_init);
 770 module_exit(sensors_adm9240_exit);
 771