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