drivers/hwmon/applesmc.c

   1 /*
   2  * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
   3  * sensors, fan control, keyboard backlight control) used in Intel-based Apple
   4  * computers.
   5  *
   6  * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
   7  *
   8  * Based on hdaps.c driver:
   9  * Copyright (C) 2005 Robert Love <rml@novell.com>
  10  * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
  11  *
  12  * Fan control based on smcFanControl:
  13  * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU General Public License v2 as published by the
  17  * Free Software Foundation.
  18  *
  19  * This program is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  22  * more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along with
  25  * this program; if not, write to the Free Software Foundation, Inc.,
  26  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  27  */
  28
  29 #include <linux/delay.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/input-polldev.h>
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/timer.h>
  35 #include <linux/dmi.h>
  36 #include <linux/mutex.h>
  37 #include <linux/hwmon-sysfs.h>
  38 #include <asm/io.h>
  39 #include <linux/leds.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/workqueue.h>
  42
  43 /* data port used by Apple SMC */
  44 #define APPLESMC_DATA_PORT      0x300
  45 /* command/status port used by Apple SMC */
  46 #define APPLESMC_CMD_PORT       0x304
  47
  48 #define APPLESMC_NR_PORTS       32 /* 0x300-0x31f */
  49
  50 #define APPLESMC_MAX_DATA_LENGTH 32
  51
  52 #define APPLESMC_STATUS_MASK    0x0f
  53 #define APPLESMC_READ_CMD       0x10
  54 #define APPLESMC_WRITE_CMD      0x11
  55 #define APPLESMC_GET_KEY_BY_INDEX_CMD   0x12
  56 #define APPLESMC_GET_KEY_TYPE_CMD       0x13
  57
  58 #define KEY_COUNT_KEY           "#KEY" /* r-o ui32 */
  59
  60 #define LIGHT_SENSOR_LEFT_KEY   "ALV0" /* r-o {alv (6 bytes) */
  61 #define LIGHT_SENSOR_RIGHT_KEY  "ALV1" /* r-o {alv (6 bytes) */
  62 #define BACKLIGHT_KEY           "LKSB" /* w-o {lkb (2 bytes) */
  63
  64 #define CLAMSHELL_KEY           "MSLD" /* r-o ui8 (unused) */
  65
  66 #define MOTION_SENSOR_X_KEY     "MO_X" /* r-o sp78 (2 bytes) */
  67 #define MOTION_SENSOR_Y_KEY     "MO_Y" /* r-o sp78 (2 bytes) */
  68 #define MOTION_SENSOR_Z_KEY     "MO_Z" /* r-o sp78 (2 bytes) */
  69 #define MOTION_SENSOR_KEY       "MOCN" /* r/w ui16 */
  70
  71 #define FANS_COUNT              "FNum" /* r-o ui8 */
  72 #define FANS_MANUAL             "FS! " /* r-w ui16 */
  73 #define FAN_ACTUAL_SPEED        "F0Ac" /* r-o fpe2 (2 bytes) */
  74 #define FAN_MIN_SPEED           "F0Mn" /* r-o fpe2 (2 bytes) */
  75 #define FAN_MAX_SPEED           "F0Mx" /* r-o fpe2 (2 bytes) */
  76 #define FAN_SAFE_SPEED          "F0Sf" /* r-o fpe2 (2 bytes) */
  77 #define FAN_TARGET_SPEED        "F0Tg" /* r-w fpe2 (2 bytes) */
  78 #define FAN_POSITION            "F0ID" /* r-o char[16] */
  79
  80 /*
  81  * Temperature sensors keys (sp78 - 2 bytes).
  82  */
  83 static const char* temperature_sensors_sets[][36] = {
  84 /* Set 0: Macbook Pro */
  85         { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
  86           "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
  87 /* Set 1: Macbook set */
  88         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S",
  89           "Th1H", "Ts0P", NULL },
  90 /* Set 2: Macmini set */
  91         { "TC0D", "TC0P", NULL },
  92 /* Set 3: Mac Pro (2 x Quad-Core) */
  93         { "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
  94           "TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "THTG", "TH0P",
  95           "TH1P", "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S",
  96           "TM1P", "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P",
  97           "TM9S", "TN0H", "TS0C", NULL },
  98 };
  99
 100 /* List of keys used to read/write fan speeds */
 101 static const char* fan_speed_keys[] = {
 102         FAN_ACTUAL_SPEED,
 103         FAN_MIN_SPEED,
 104         FAN_MAX_SPEED,
 105         FAN_SAFE_SPEED,
 106         FAN_TARGET_SPEED
 107 };
 108
 109 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
 110 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
 111
 112 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
 113 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 114 #define APPLESMC_INPUT_FLAT     4
 115
 116 #define SENSOR_X 0
 117 #define SENSOR_Y 1
 118 #define SENSOR_Z 2
 119
 120 /* Structure to be passed to DMI_MATCH function */
 121 struct dmi_match_data {
 122 /* Indicates whether this computer has an accelerometer. */
 123         int accelerometer;
 124 /* Indicates whether this computer has light sensors and keyboard backlight. */
 125         int light;
 126 /* Indicates which temperature sensors set to use. */
 127         int temperature_set;
 128 };
 129
 130 static const int debug;
 131 static struct platform_device *pdev;
 132 static s16 rest_x;
 133 static s16 rest_y;
 134 static struct device *hwmon_dev;
 135 static struct input_polled_dev *applesmc_idev;
 136
 137 /* Indicates whether this computer has an accelerometer. */
 138 static unsigned int applesmc_accelerometer;
 139
 140 /* Indicates whether this computer has light sensors and keyboard backlight. */
 141 static unsigned int applesmc_light;
 142
 143 /* Indicates which temperature sensors set to use. */
 144 static unsigned int applesmc_temperature_set;
 145
 146 static DEFINE_MUTEX(applesmc_lock);
 147
 148 /*
 149  * Last index written to key_at_index sysfs file, and value to use for all other
 150  * key_at_index_* sysfs files.
 151  */
 152 static unsigned int key_at_index;
 153
 154 static struct workqueue_struct *applesmc_led_wq;
 155
 156 /*
 157  * __wait_status - Wait up to 2ms for the status port to get a certain value
 158  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 159  * hold applesmc_lock.
 160  */
 161 static int __wait_status(u8 val)
 162 {
 163         unsigned int i;
 164
 165         val = val & APPLESMC_STATUS_MASK;
 166
 167         for (i = 0; i < 200; i++) {
 168                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
 169                         if (debug)
 170                                 printk(KERN_DEBUG
 171                                                 "Waited %d us for status %x\n",
 172                                                 i*10, val);
 173                         return 0;
 174                 }
 175                 udelay(10);
 176         }
 177
 178         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
 179                                                 val, inb(APPLESMC_CMD_PORT));
 180
 181         return -EIO;
 182 }
 183
 184 /*
 185  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 186  * Returns zero on success or a negative error on failure. Callers must
 187  * hold applesmc_lock.
 188  */
 189 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
 190 {
 191         int i;
 192
 193         if (len > APPLESMC_MAX_DATA_LENGTH) {
 194                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
 195                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 196                 return -EINVAL;
 197         }
 198
 199         outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT);
 200         if (__wait_status(0x0c))
 201                 return -EIO;
 202
 203         for (i = 0; i < 4; i++) {
 204                 outb(key[i], APPLESMC_DATA_PORT);
 205                 if (__wait_status(0x04))
 206                         return -EIO;
 207         }
 208         if (debug)
 209                 printk(KERN_DEBUG "<%s", key);
 210
 211         outb(len, APPLESMC_DATA_PORT);
 212         if (debug)
 213                 printk(KERN_DEBUG ">%x", len);
 214
 215         for (i = 0; i < len; i++) {
 216                 if (__wait_status(0x05))
 217                         return -EIO;
 218                 buffer[i] = inb(APPLESMC_DATA_PORT);
 219                 if (debug)
 220                         printk(KERN_DEBUG "<%x", buffer[i]);
 221         }
 222         if (debug)
 223                 printk(KERN_DEBUG "\n");
 224
 225         return 0;
 226 }
 227
 228 /*
 229  * applesmc_write_key - writes len bytes from buffer to a given key.
 230  * Returns zero on success or a negative error on failure. Callers must
 231  * hold applesmc_lock.
 232  */
 233 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
 234 {
 235         int i;
 236
 237         if (len > APPLESMC_MAX_DATA_LENGTH) {
 238                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
 239                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 240                 return -EINVAL;
 241         }
 242
 243         outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT);
 244         if (__wait_status(0x0c))
 245                 return -EIO;
 246
 247         for (i = 0; i < 4; i++) {
 248                 outb(key[i], APPLESMC_DATA_PORT);
 249                 if (__wait_status(0x04))
 250                         return -EIO;
 251         }
 252
 253         outb(len, APPLESMC_DATA_PORT);
 254
 255         for (i = 0; i < len; i++) {
 256                 if (__wait_status(0x04))
 257                         return -EIO;
 258                 outb(buffer[i], APPLESMC_DATA_PORT);
 259         }
 260
 261         return 0;
 262 }
 263
 264 /*
 265  * applesmc_get_key_at_index - get key at index, and put the result in key
 266  * (char[6]). Returns zero on success or a negative error on failure. Callers
 267  * must hold applesmc_lock.
 268  */
 269 static int applesmc_get_key_at_index(int index, char* key)
 270 {
 271         int i;
 272         u8 readkey[4];
 273         readkey[0] = index >> 24;
 274         readkey[1] = index >> 16;
 275         readkey[2] = index >> 8;
 276         readkey[3] = index;
 277
 278         outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT);
 279         if (__wait_status(0x0c))
 280                 return -EIO;
 281
 282         for (i = 0; i < 4; i++) {
 283                 outb(readkey[i], APPLESMC_DATA_PORT);
 284                 if (__wait_status(0x04))
 285                         return -EIO;
 286         }
 287
 288         outb(4, APPLESMC_DATA_PORT);
 289
 290         for (i = 0; i < 4; i++) {
 291                 if (__wait_status(0x05))
 292                         return -EIO;
 293                 key[i] = inb(APPLESMC_DATA_PORT);
 294         }
 295         key[4] = 0;
 296
 297         return 0;
 298 }
 299
 300 /*
 301  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 302  * Returns zero on success or a negative error on failure. Callers must
 303  * hold applesmc_lock.
 304  */
 305 static int applesmc_get_key_type(char* key, char* type)
 306 {
 307         int i;
 308
 309         outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT);
 310         if (__wait_status(0x0c))
 311                 return -EIO;
 312
 313         for (i = 0; i < 4; i++) {
 314                 outb(key[i], APPLESMC_DATA_PORT);
 315                 if (__wait_status(0x04))
 316                         return -EIO;
 317         }
 318
 319         outb(5, APPLESMC_DATA_PORT);
 320
 321         for (i = 0; i < 6; i++) {
 322                 if (__wait_status(0x05))
 323                         return -EIO;
 324                 type[i] = inb(APPLESMC_DATA_PORT);
 325         }
 326         type[5] = 0;
 327
 328         return 0;
 329 }
 330
 331 /*
 332  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 333  * hold applesmc_lock.
 334  */
 335 static int applesmc_read_motion_sensor(int index, s16* value)
 336 {
 337         u8 buffer[2];
 338         int ret;
 339
 340         switch (index) {
 341         case SENSOR_X:
 342                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
 343                 break;
 344         case SENSOR_Y:
 345                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
 346                 break;
 347         case SENSOR_Z:
 348                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 349                 break;
 350         default:
 351                 ret = -EINVAL;
 352         }
 353
 354         *value = ((s16)buffer[0] << 8) | buffer[1];
 355
 356         return ret;
 357 }
 358
 359 /*
 360  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 361  * and negative error code on failure.  Can sleep.
 362  */
 363 static int applesmc_device_init(void)
 364 {
 365         int total, ret = -ENXIO;
 366         u8 buffer[2];
 367
 368         if (!applesmc_accelerometer)
 369                 return 0;
 370
 371         mutex_lock(&applesmc_lock);
 372
 373         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 374                 if (debug)
 375                         printk(KERN_DEBUG "applesmc try %d\n", total);
 376                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 377                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
 378                         if (total == INIT_TIMEOUT_MSECS) {
 379                                 printk(KERN_DEBUG "applesmc: device has"
 380                                                 " already been initialized"
 381                                                 " (0x%02x, 0x%02x).\n",
 382                                                 buffer[0], buffer[1]);
 383                         } else {
 384                                 printk(KERN_DEBUG "applesmc: device"
 385                                                 " successfully initialized"
 386                                                 " (0x%02x, 0x%02x).\n",
 387                                                 buffer[0], buffer[1]);
 388                         }
 389                         ret = 0;
 390                         goto out;
 391                 }
 392                 buffer[0] = 0xe0;
 393                 buffer[1] = 0x00;
 394                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 395                 msleep(INIT_WAIT_MSECS);
 396         }
 397
 398         printk(KERN_WARNING "applesmc: failed to init the device\n");
 399
 400 out:
 401         mutex_unlock(&applesmc_lock);
 402         return ret;
 403 }
 404
 405 /*
 406  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 407  * applesmc_lock.
 408  */
 409 static int applesmc_get_fan_count(void)
 410 {
 411         int ret;
 412         u8 buffer[1];
 413
 414         mutex_lock(&applesmc_lock);
 415
 416         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
 417
 418         mutex_unlock(&applesmc_lock);
 419         if (ret)
 420                 return ret;
 421         else
 422                 return buffer[0];
 423 }
 424
 425 /* Device model stuff */
 426 static int applesmc_probe(struct platform_device *dev)
 427 {
 428         int ret;
 429
 430         ret = applesmc_device_init();
 431         if (ret)
 432                 return ret;
 433
 434         printk(KERN_INFO "applesmc: device successfully initialized.\n");
 435         return 0;
 436 }
 437
 438 static int applesmc_resume(struct platform_device *dev)
 439 {
 440         return applesmc_device_init();
 441 }
 442
 443 static struct platform_driver applesmc_driver = {
 444         .probe = applesmc_probe,
 445         .resume = applesmc_resume,
 446         .driver = {
 447                 .name = "applesmc",
 448                 .owner = THIS_MODULE,
 449         },
 450 };
 451
 452 /*
 453  * applesmc_calibrate - Set our "resting" values.  Callers must
 454  * hold applesmc_lock.
 455  */
 456 static void applesmc_calibrate(void)
 457 {
 458         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
 459         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
 460         rest_x = -rest_x;
 461 }
 462
 463 static void applesmc_idev_poll(struct input_polled_dev *dev)
 464 {
 465         struct input_dev *idev = dev->input;
 466         s16 x, y;
 467
 468         mutex_lock(&applesmc_lock);
 469
 470         if (applesmc_read_motion_sensor(SENSOR_X, &x))
 471                 goto out;
 472         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
 473                 goto out;
 474
 475         x = -x;
 476         input_report_abs(idev, ABS_X, x - rest_x);
 477         input_report_abs(idev, ABS_Y, y - rest_y);
 478         input_sync(idev);
 479
 480 out:
 481         mutex_unlock(&applesmc_lock);
 482 }
 483
 484 /* Sysfs Files */
 485
 486 static ssize_t applesmc_name_show(struct device *dev,
 487                                    struct device_attribute *attr, char *buf)
 488 {
 489         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 490 }
 491
 492 static ssize_t applesmc_position_show(struct device *dev,
 493                                    struct device_attribute *attr, char *buf)
 494 {
 495         int ret;
 496         s16 x, y, z;
 497
 498         mutex_lock(&applesmc_lock);
 499
 500         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
 501         if (ret)
 502                 goto out;
 503         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
 504         if (ret)
 505                 goto out;
 506         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
 507         if (ret)
 508                 goto out;
 509
 510 out:
 511         mutex_unlock(&applesmc_lock);
 512         if (ret)
 513                 return ret;
 514         else
 515                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 516 }
 517
 518 static ssize_t applesmc_light_show(struct device *dev,
 519                                 struct device_attribute *attr, char *sysfsbuf)
 520 {
 521         int ret;
 522         u8 left = 0, right = 0;
 523         u8 buffer[6];
 524
 525         mutex_lock(&applesmc_lock);
 526
 527         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
 528         left = buffer[2];
 529         if (ret)
 530                 goto out;
 531         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
 532         right = buffer[2];
 533
 534 out:
 535         mutex_unlock(&applesmc_lock);
 536         if (ret)
 537                 return ret;
 538         else
 539                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 540 }
 541
 542 /* Displays degree Celsius * 1000 */
 543 static ssize_t applesmc_show_temperature(struct device *dev,
 544                         struct device_attribute *devattr, char *sysfsbuf)
 545 {
 546         int ret;
 547         u8 buffer[2];
 548         unsigned int temp;
 549         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 550         const char* key =
 551                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
 552
 553         mutex_lock(&applesmc_lock);
 554
 555         ret = applesmc_read_key(key, buffer, 2);
 556         temp = buffer[0]*1000;
 557         temp += (buffer[1] >> 6) * 250;
 558
 559         mutex_unlock(&applesmc_lock);
 560
 561         if (ret)
 562                 return ret;
 563         else
 564                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
 565 }
 566
 567 static ssize_t applesmc_show_fan_speed(struct device *dev,
 568                                 struct device_attribute *attr, char *sysfsbuf)
 569 {
 570         int ret;
 571         unsigned int speed = 0;
 572         char newkey[5];
 573         u8 buffer[2];
 574         struct sensor_device_attribute_2 *sensor_attr =
 575                                                 to_sensor_dev_attr_2(attr);
 576
 577         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 578         newkey[1] = '0' + sensor_attr->index;
 579         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 580         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 581         newkey[4] = 0;
 582
 583         mutex_lock(&applesmc_lock);
 584
 585         ret = applesmc_read_key(newkey, buffer, 2);
 586         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 587
 588         mutex_unlock(&applesmc_lock);
 589         if (ret)
 590                 return ret;
 591         else
 592                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 593 }
 594
 595 static ssize_t applesmc_store_fan_speed(struct device *dev,
 596                                         struct device_attribute *attr,
 597                                         const char *sysfsbuf, size_t count)
 598 {
 599         int ret;
 600         u32 speed;
 601         char newkey[5];
 602         u8 buffer[2];
 603         struct sensor_device_attribute_2 *sensor_attr =
 604                                                 to_sensor_dev_attr_2(attr);
 605
 606         speed = simple_strtoul(sysfsbuf, NULL, 10);
 607
 608         if (speed > 0x4000) /* Bigger than a 14-bit value */
 609                 return -EINVAL;
 610
 611         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 612         newkey[1] = '0' + sensor_attr->index;
 613         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 614         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 615         newkey[4] = 0;
 616
 617         mutex_lock(&applesmc_lock);
 618
 619         buffer[0] = (speed >> 6) & 0xff;
 620         buffer[1] = (speed << 2) & 0xff;
 621         ret = applesmc_write_key(newkey, buffer, 2);
 622
 623         mutex_unlock(&applesmc_lock);
 624         if (ret)
 625                 return ret;
 626         else
 627                 return count;
 628 }
 629
 630 static ssize_t applesmc_show_fan_manual(struct device *dev,
 631                         struct device_attribute *devattr, char *sysfsbuf)
 632 {
 633         int ret;
 634         u16 manual = 0;
 635         u8 buffer[2];
 636         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 637
 638         mutex_lock(&applesmc_lock);
 639
 640         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 641         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
 642
 643         mutex_unlock(&applesmc_lock);
 644         if (ret)
 645                 return ret;
 646         else
 647                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 648 }
 649
 650 static ssize_t applesmc_store_fan_manual(struct device *dev,
 651                                          struct device_attribute *devattr,
 652                                          const char *sysfsbuf, size_t count)
 653 {
 654         int ret;
 655         u8 buffer[2];
 656         u32 input;
 657         u16 val;
 658         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 659
 660         input = simple_strtoul(sysfsbuf, NULL, 10);
 661
 662         mutex_lock(&applesmc_lock);
 663
 664         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 665         val = (buffer[0] << 8 | buffer[1]);
 666         if (ret)
 667                 goto out;
 668
 669         if (input)
 670                 val = val | (0x01 << attr->index);
 671         else
 672                 val = val & ~(0x01 << attr->index);
 673
 674         buffer[0] = (val >> 8) & 0xFF;
 675         buffer[1] = val & 0xFF;
 676
 677         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 678
 679 out:
 680         mutex_unlock(&applesmc_lock);
 681         if (ret)
 682                 return ret;
 683         else
 684                 return count;
 685 }
 686
 687 static ssize_t applesmc_show_fan_position(struct device *dev,
 688                                 struct device_attribute *attr, char *sysfsbuf)
 689 {
 690         int ret;
 691         char newkey[5];
 692         u8 buffer[17];
 693         struct sensor_device_attribute_2 *sensor_attr =
 694                                                 to_sensor_dev_attr_2(attr);
 695
 696         newkey[0] = FAN_POSITION[0];
 697         newkey[1] = '0' + sensor_attr->index;
 698         newkey[2] = FAN_POSITION[2];
 699         newkey[3] = FAN_POSITION[3];
 700         newkey[4] = 0;
 701
 702         mutex_lock(&applesmc_lock);
 703
 704         ret = applesmc_read_key(newkey, buffer, 16);
 705         buffer[16] = 0;
 706
 707         mutex_unlock(&applesmc_lock);
 708         if (ret)
 709                 return ret;
 710         else
 711                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 712 }
 713
 714 static ssize_t applesmc_calibrate_show(struct device *dev,
 715                                 struct device_attribute *attr, char *sysfsbuf)
 716 {
 717         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 718 }
 719
 720 static ssize_t applesmc_calibrate_store(struct device *dev,
 721         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 722 {
 723         mutex_lock(&applesmc_lock);
 724         applesmc_calibrate();
 725         mutex_unlock(&applesmc_lock);
 726
 727         return count;
 728 }
 729
 730 /* Store the next backlight value to be written by the work */
 731 static unsigned int backlight_value;
 732
 733 static void applesmc_backlight_set(struct work_struct *work)
 734 {
 735         u8 buffer[2];
 736
 737         mutex_lock(&applesmc_lock);
 738         buffer[0] = backlight_value;
 739         buffer[1] = 0x00;
 740         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
 741         mutex_unlock(&applesmc_lock);
 742 }
 743 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 744
 745 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 746                                                 enum led_brightness value)
 747 {
 748         int ret;
 749
 750         backlight_value = value;
 751         ret = queue_work(applesmc_led_wq, &backlight_work);
 752
 753         if (debug && (!ret))
 754                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
 755 }
 756
 757 static ssize_t applesmc_key_count_show(struct device *dev,
 758                                 struct device_attribute *attr, char *sysfsbuf)
 759 {
 760         int ret;
 761         u8 buffer[4];
 762         u32 count;
 763
 764         mutex_lock(&applesmc_lock);
 765
 766         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 767         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 768                                                 ((u32)buffer[2]<<8) + buffer[3];
 769
 770         mutex_unlock(&applesmc_lock);
 771         if (ret)
 772                 return ret;
 773         else
 774                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 775 }
 776
 777 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 778                                 struct device_attribute *attr, char *sysfsbuf)
 779 {
 780         char key[5];
 781         char info[6];
 782         int ret;
 783
 784         mutex_lock(&applesmc_lock);
 785
 786         ret = applesmc_get_key_at_index(key_at_index, key);
 787
 788         if (ret || !key[0]) {
 789                 mutex_unlock(&applesmc_lock);
 790
 791                 return -EINVAL;
 792         }
 793
 794         ret = applesmc_get_key_type(key, info);
 795
 796         if (ret) {
 797                 mutex_unlock(&applesmc_lock);
 798
 799                 return ret;
 800         }
 801
 802         /*
 803          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
 804          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
 805          */
 806         ret = applesmc_read_key(key, sysfsbuf, info[0]);
 807
 808         mutex_unlock(&applesmc_lock);
 809
 810         if (!ret) {
 811                 return info[0];
 812         } else {
 813                 return ret;
 814         }
 815 }
 816
 817 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 818                                 struct device_attribute *attr, char *sysfsbuf)
 819 {
 820         char key[5];
 821         char info[6];
 822         int ret;
 823
 824         mutex_lock(&applesmc_lock);
 825
 826         ret = applesmc_get_key_at_index(key_at_index, key);
 827
 828         if (ret || !key[0]) {
 829                 mutex_unlock(&applesmc_lock);
 830
 831                 return -EINVAL;
 832         }
 833
 834         ret = applesmc_get_key_type(key, info);
 835
 836         mutex_unlock(&applesmc_lock);
 837
 838         if (!ret)
 839                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
 840         else
 841                 return ret;
 842 }
 843
 844 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 845                                 struct device_attribute *attr, char *sysfsbuf)
 846 {
 847         char key[5];
 848         char info[6];
 849         int ret;
 850
 851         mutex_lock(&applesmc_lock);
 852
 853         ret = applesmc_get_key_at_index(key_at_index, key);
 854
 855         if (ret || !key[0]) {
 856                 mutex_unlock(&applesmc_lock);
 857
 858                 return -EINVAL;
 859         }
 860
 861         ret = applesmc_get_key_type(key, info);
 862
 863         mutex_unlock(&applesmc_lock);
 864
 865         if (!ret)
 866                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
 867         else
 868                 return ret;
 869 }
 870
 871 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 872                                 struct device_attribute *attr, char *sysfsbuf)
 873 {
 874         char key[5];
 875         int ret;
 876
 877         mutex_lock(&applesmc_lock);
 878
 879         ret = applesmc_get_key_at_index(key_at_index, key);
 880
 881         mutex_unlock(&applesmc_lock);
 882
 883         if (!ret && key[0])
 884                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 885         else
 886                 return -EINVAL;
 887 }
 888
 889 static ssize_t applesmc_key_at_index_show(struct device *dev,
 890                                 struct device_attribute *attr, char *sysfsbuf)
 891 {
 892         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
 893 }
 894
 895 static ssize_t applesmc_key_at_index_store(struct device *dev,
 896         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 897 {
 898         mutex_lock(&applesmc_lock);
 899
 900         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
 901
 902         mutex_unlock(&applesmc_lock);
 903
 904         return count;
 905 }
 906
 907 static struct led_classdev applesmc_backlight = {
 908         .name                   = "smc::kbd_backlight",
 909         .default_trigger        = "nand-disk",
 910         .brightness_set         = applesmc_brightness_set,
 911 };
 912
 913 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
 914
 915 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
 916 static DEVICE_ATTR(calibrate, 0644,
 917                         applesmc_calibrate_show, applesmc_calibrate_store);
 918
 919 static struct attribute *accelerometer_attributes[] = {
 920         &dev_attr_position.attr,
 921         &dev_attr_calibrate.attr,
 922         NULL
 923 };
 924
 925 static const struct attribute_group accelerometer_attributes_group =
 926         { .attrs = accelerometer_attributes };
 927
 928 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
 929
 930 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
 931 static DEVICE_ATTR(key_at_index, 0644,
 932                 applesmc_key_at_index_show, applesmc_key_at_index_store);
 933 static DEVICE_ATTR(key_at_index_name, 0444,
 934                                         applesmc_key_at_index_name_show, NULL);
 935 static DEVICE_ATTR(key_at_index_type, 0444,
 936                                         applesmc_key_at_index_type_show, NULL);
 937 static DEVICE_ATTR(key_at_index_data_length, 0444,
 938                                 applesmc_key_at_index_data_length_show, NULL);
 939 static DEVICE_ATTR(key_at_index_data, 0444,
 940                                 applesmc_key_at_index_read_show, NULL);
 941
 942 static struct attribute *key_enumeration_attributes[] = {
 943         &dev_attr_key_count.attr,
 944         &dev_attr_key_at_index.attr,
 945         &dev_attr_key_at_index_name.attr,
 946         &dev_attr_key_at_index_type.attr,
 947         &dev_attr_key_at_index_data_length.attr,
 948         &dev_attr_key_at_index_data.attr,
 949         NULL
 950 };
 951
 952 static const struct attribute_group key_enumeration_group =
 953         { .attrs = key_enumeration_attributes };
 954
 955 /*
 956  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
 957  *  - show actual speed
 958  *  - show/store minimum speed
 959  *  - show maximum speed
 960  *  - show safe speed
 961  *  - show/store target speed
 962  *  - show/store manual mode
 963  */
 964 #define sysfs_fan_speeds_offset(offset) \
 965 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
 966                         applesmc_show_fan_speed, NULL, 0, offset-1); \
 967 \
 968 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
 969         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
 970 \
 971 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
 972                         applesmc_show_fan_speed, NULL, 2, offset-1); \
 973 \
 974 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
 975                         applesmc_show_fan_speed, NULL, 3, offset-1); \
 976 \
 977 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
 978         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
 979 \
 980 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
 981         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
 982 \
 983 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
 984         applesmc_show_fan_position, NULL, offset-1); \
 985 \
 986 static struct attribute *fan##offset##_attributes[] = { \
 987         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
 988         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
 989         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
 990         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
 991         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
 992         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
 993         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
 994         NULL \
 995 };
 996
 997 /*
 998  * Create the needed functions for each fan using the macro defined above
 999  * (4 fans are supported)
1000  */
1001 sysfs_fan_speeds_offset(1);
1002 sysfs_fan_speeds_offset(2);
1003 sysfs_fan_speeds_offset(3);
1004 sysfs_fan_speeds_offset(4);
1005
1006 static const struct attribute_group fan_attribute_groups[] = {
1007         { .attrs = fan1_attributes },
1008         { .attrs = fan2_attributes },
1009         { .attrs = fan3_attributes },
1010         { .attrs = fan4_attributes },
1011 };
1012
1013 /*
1014  * Temperature sensors sysfs entries.
1015  */
1016 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1017                                         applesmc_show_temperature, NULL, 0);
1018 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1019                                         applesmc_show_temperature, NULL, 1);
1020 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1021                                         applesmc_show_temperature, NULL, 2);
1022 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1023                                         applesmc_show_temperature, NULL, 3);
1024 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1025                                         applesmc_show_temperature, NULL, 4);
1026 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1027                                         applesmc_show_temperature, NULL, 5);
1028 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1029                                         applesmc_show_temperature, NULL, 6);
1030 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1031                                         applesmc_show_temperature, NULL, 7);
1032 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1033                                         applesmc_show_temperature, NULL, 8);
1034 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1035                                         applesmc_show_temperature, NULL, 9);
1036 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1037                                         applesmc_show_temperature, NULL, 10);
1038 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1039                                         applesmc_show_temperature, NULL, 11);
1040 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1041                                         applesmc_show_temperature, NULL, 12);
1042 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1043                                         applesmc_show_temperature, NULL, 13);
1044 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1045                                         applesmc_show_temperature, NULL, 14);
1046 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1047                                         applesmc_show_temperature, NULL, 15);
1048 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1049                                         applesmc_show_temperature, NULL, 16);
1050 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1051                                         applesmc_show_temperature, NULL, 17);
1052 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1053                                         applesmc_show_temperature, NULL, 18);
1054 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1055                                         applesmc_show_temperature, NULL, 19);
1056 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1057                                         applesmc_show_temperature, NULL, 20);
1058 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1059                                         applesmc_show_temperature, NULL, 21);
1060 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1061                                         applesmc_show_temperature, NULL, 22);
1062 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1063                                         applesmc_show_temperature, NULL, 23);
1064 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1065                                         applesmc_show_temperature, NULL, 24);
1066 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1067                                         applesmc_show_temperature, NULL, 25);
1068 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1069                                         applesmc_show_temperature, NULL, 26);
1070 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1071                                         applesmc_show_temperature, NULL, 27);
1072 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1073                                         applesmc_show_temperature, NULL, 28);
1074 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1075                                         applesmc_show_temperature, NULL, 29);
1076 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1077                                         applesmc_show_temperature, NULL, 30);
1078 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1079                                         applesmc_show_temperature, NULL, 31);
1080 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1081                                         applesmc_show_temperature, NULL, 32);
1082 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1083                                         applesmc_show_temperature, NULL, 33);
1084 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1085                                         applesmc_show_temperature, NULL, 34);
1086
1087 static struct attribute *temperature_attributes[] = {
1088         &sensor_dev_attr_temp1_input.dev_attr.attr,
1089         &sensor_dev_attr_temp2_input.dev_attr.attr,
1090         &sensor_dev_attr_temp3_input.dev_attr.attr,
1091         &sensor_dev_attr_temp4_input.dev_attr.attr,
1092         &sensor_dev_attr_temp5_input.dev_attr.attr,
1093         &sensor_dev_attr_temp6_input.dev_attr.attr,
1094         &sensor_dev_attr_temp7_input.dev_attr.attr,
1095         &sensor_dev_attr_temp8_input.dev_attr.attr,
1096         &sensor_dev_attr_temp9_input.dev_attr.attr,
1097         &sensor_dev_attr_temp10_input.dev_attr.attr,
1098         &sensor_dev_attr_temp11_input.dev_attr.attr,
1099         &sensor_dev_attr_temp12_input.dev_attr.attr,
1100         &sensor_dev_attr_temp13_input.dev_attr.attr,
1101         &sensor_dev_attr_temp14_input.dev_attr.attr,
1102         &sensor_dev_attr_temp15_input.dev_attr.attr,
1103         &sensor_dev_attr_temp16_input.dev_attr.attr,
1104         &sensor_dev_attr_temp17_input.dev_attr.attr,
1105         &sensor_dev_attr_temp18_input.dev_attr.attr,
1106         &sensor_dev_attr_temp19_input.dev_attr.attr,
1107         &sensor_dev_attr_temp20_input.dev_attr.attr,
1108         &sensor_dev_attr_temp21_input.dev_attr.attr,
1109         &sensor_dev_attr_temp22_input.dev_attr.attr,
1110         &sensor_dev_attr_temp23_input.dev_attr.attr,
1111         &sensor_dev_attr_temp24_input.dev_attr.attr,
1112         &sensor_dev_attr_temp25_input.dev_attr.attr,
1113         &sensor_dev_attr_temp26_input.dev_attr.attr,
1114         &sensor_dev_attr_temp27_input.dev_attr.attr,
1115         &sensor_dev_attr_temp28_input.dev_attr.attr,
1116         &sensor_dev_attr_temp29_input.dev_attr.attr,
1117         &sensor_dev_attr_temp30_input.dev_attr.attr,
1118         &sensor_dev_attr_temp31_input.dev_attr.attr,
1119         &sensor_dev_attr_temp32_input.dev_attr.attr,
1120         &sensor_dev_attr_temp33_input.dev_attr.attr,
1121         &sensor_dev_attr_temp34_input.dev_attr.attr,
1122         &sensor_dev_attr_temp35_input.dev_attr.attr,
1123         NULL
1124 };
1125
1126 static const struct attribute_group temperature_attributes_group =
1127         { .attrs = temperature_attributes };
1128
1129 /* Module stuff */
1130
1131 /*
1132  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1133  */
1134 static int applesmc_dmi_match(const struct dmi_system_id *id)
1135 {
1136         int i = 0;
1137         struct dmi_match_data* dmi_data = id->driver_data;
1138         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1139         applesmc_accelerometer = dmi_data->accelerometer;
1140         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1141                                 applesmc_accelerometer ? "with" : "without");
1142         applesmc_light = dmi_data->light;
1143         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1144                                         applesmc_light ? "with" : "without");
1145
1146         applesmc_temperature_set =  dmi_data->temperature_set;
1147         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1148                 i++;
1149         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1150         return 1;
1151 }
1152
1153 /* Create accelerometer ressources */
1154 static int applesmc_create_accelerometer(void)
1155 {
1156         struct input_dev *idev;
1157         int ret;
1158
1159         ret = sysfs_create_group(&pdev->dev.kobj,
1160                                         &accelerometer_attributes_group);
1161         if (ret)
1162                 goto out;
1163
1164         applesmc_idev = input_allocate_polled_device();
1165         if (!applesmc_idev) {
1166                 ret = -ENOMEM;
1167                 goto out_sysfs;
1168         }
1169
1170         applesmc_idev->poll = applesmc_idev_poll;
1171         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1172
1173         /* initial calibrate for the input device */
1174         applesmc_calibrate();
1175
1176         /* initialize the input device */
1177         idev = applesmc_idev->input;
1178         idev->name = "applesmc";
1179         idev->id.bustype = BUS_HOST;
1180         idev->dev.parent = &pdev->dev;
1181         idev->evbit[0] = BIT_MASK(EV_ABS);
1182         input_set_abs_params(idev, ABS_X,
1183                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1184         input_set_abs_params(idev, ABS_Y,
1185                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1186
1187         ret = input_register_polled_device(applesmc_idev);
1188         if (ret)
1189                 goto out_idev;
1190
1191         return 0;
1192
1193 out_idev:
1194         input_free_polled_device(applesmc_idev);
1195
1196 out_sysfs:
1197         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1198
1199 out:
1200         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1201         return ret;
1202 }
1203
1204 /* Release all ressources used by the accelerometer */
1205 static void applesmc_release_accelerometer(void)
1206 {
1207         input_unregister_polled_device(applesmc_idev);
1208         input_free_polled_device(applesmc_idev);
1209         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1210 }
1211
1212 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1213 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1214         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1215 /* MacBook: accelerometer and temperature set 1 */
1216         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1217 /* MacMini: temperature set 2 */
1218         { .accelerometer = 0, .light = 0, .temperature_set = 2 },
1219 /* MacPro: temperature set 3 */
1220         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1221 };
1222
1223 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1224  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1225 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1226         { applesmc_dmi_match, "Apple MacBook Pro", {
1227           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1228           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1229                 (void*)&applesmc_dmi_data[0]},
1230         { applesmc_dmi_match, "Apple MacBook", {
1231           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1232           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1233                 (void*)&applesmc_dmi_data[1]},
1234         { applesmc_dmi_match, "Apple Macmini", {
1235           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1236           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1237                 (void*)&applesmc_dmi_data[2]},
1238         { applesmc_dmi_match, "Apple MacPro2", {
1239           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1240           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1241                 (void*)&applesmc_dmi_data[3]},
1242         { .ident = NULL }
1243 };
1244
1245 static int __init applesmc_init(void)
1246 {
1247         int ret;
1248         int count;
1249         int i;
1250
1251         if (!dmi_check_system(applesmc_whitelist)) {
1252                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1253                 ret = -ENODEV;
1254                 goto out;
1255         }
1256
1257         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1258                                                                 "applesmc")) {
1259                 ret = -ENXIO;
1260                 goto out;
1261         }
1262
1263         ret = platform_driver_register(&applesmc_driver);
1264         if (ret)
1265                 goto out_region;
1266
1267         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1268                                                NULL, 0);
1269         if (IS_ERR(pdev)) {
1270                 ret = PTR_ERR(pdev);
1271                 goto out_driver;
1272         }
1273
1274         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1275         if (ret)
1276                 goto out_device;
1277
1278         /* Create key enumeration sysfs files */
1279         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1280         if (ret)
1281                 goto out_name;
1282
1283         /* create fan files */
1284         count = applesmc_get_fan_count();
1285         if (count < 0) {
1286                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1287         } else {
1288                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1289
1290                 switch (count) {
1291                 default:
1292                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1293                                         " but at most 4 fans are supported"
1294                                                 " by the driver.\n");
1295                 case 4:
1296                         ret = sysfs_create_group(&pdev->dev.kobj,
1297                                                  &fan_attribute_groups[3]);
1298                         if (ret)
1299                                 goto out_key_enumeration;
1300                 case 3:
1301                         ret = sysfs_create_group(&pdev->dev.kobj,
1302                                                  &fan_attribute_groups[2]);
1303                         if (ret)
1304                                 goto out_key_enumeration;
1305                 case 2:
1306                         ret = sysfs_create_group(&pdev->dev.kobj,
1307                                                  &fan_attribute_groups[1]);
1308                         if (ret)
1309                                 goto out_key_enumeration;
1310                 case 1:
1311                         ret = sysfs_create_group(&pdev->dev.kobj,
1312                                                  &fan_attribute_groups[0]);
1313                         if (ret)
1314                                 goto out_fan_1;
1315                 case 0:
1316                         ;
1317                 }
1318         }
1319
1320         for (i = 0;
1321              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1322              i++) {
1323                 if (temperature_attributes[i] == NULL) {
1324                         printk(KERN_ERR "applesmc: More temperature sensors "
1325                                 "in temperature_sensors_sets (at least %i)"
1326                                 "than available sysfs files in "
1327                                 "temperature_attributes (%i), please report "
1328                                 "this bug.\n", i, i-1);
1329                         goto out_temperature;
1330                 }
1331                 ret = sysfs_create_file(&pdev->dev.kobj,
1332                                                 temperature_attributes[i]);
1333                 if (ret)
1334                         goto out_temperature;
1335         }
1336
1337         if (applesmc_accelerometer) {
1338                 ret = applesmc_create_accelerometer();
1339                 if (ret)
1340                         goto out_temperature;
1341         }
1342
1343         if (applesmc_light) {
1344                 /* Add light sensor file */
1345                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1346                 if (ret)
1347                         goto out_accelerometer;
1348
1349                 /* Create the workqueue */
1350                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1351                 if (!applesmc_led_wq) {
1352                         ret = -ENOMEM;
1353                         goto out_light_sysfs;
1354                 }
1355
1356                 /* register as a led device */
1357                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1358                 if (ret < 0)
1359                         goto out_light_wq;
1360         }
1361
1362         hwmon_dev = hwmon_device_register(&pdev->dev);
1363         if (IS_ERR(hwmon_dev)) {
1364                 ret = PTR_ERR(hwmon_dev);
1365                 goto out_light_ledclass;
1366         }
1367
1368         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1369
1370         return 0;
1371
1372 out_light_ledclass:
1373         if (applesmc_light)
1374                 led_classdev_unregister(&applesmc_backlight);
1375 out_light_wq:
1376         if (applesmc_light)
1377                 destroy_workqueue(applesmc_led_wq);
1378 out_light_sysfs:
1379         if (applesmc_light)
1380                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1381 out_accelerometer:
1382         if (applesmc_accelerometer)
1383                 applesmc_release_accelerometer();
1384 out_temperature:
1385         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1386         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1387 out_fan_1:
1388         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1389 out_key_enumeration:
1390         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1391 out_name:
1392         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1393 out_device:
1394         platform_device_unregister(pdev);
1395 out_driver:
1396         platform_driver_unregister(&applesmc_driver);
1397 out_region:
1398         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1399 out:
1400         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1401         return ret;
1402 }
1403
1404 static void __exit applesmc_exit(void)
1405 {
1406         hwmon_device_unregister(hwmon_dev);
1407         if (applesmc_light) {
1408                 led_classdev_unregister(&applesmc_backlight);
1409                 destroy_workqueue(applesmc_led_wq);
1410                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1411         }
1412         if (applesmc_accelerometer)
1413                 applesmc_release_accelerometer();
1414         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1415         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1416         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1417         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1418         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1419         platform_device_unregister(pdev);
1420         platform_driver_unregister(&applesmc_driver);
1421         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1422
1423         printk(KERN_INFO "applesmc: driver unloaded.\n");
1424 }
1425
1426 module_init(applesmc_init);
1427 module_exit(applesmc_exit);
1428
1429 MODULE_AUTHOR("Nicolas Boichat");
1430 MODULE_DESCRIPTION("Apple SMC");
1431 MODULE_LICENSE("GPL v2");