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  * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>
   8  *
   9  * Based on hdaps.c driver:
  10  * Copyright (C) 2005 Robert Love <rml@novell.com>
  11  * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net>
  12  *
  13  * Fan control based on smcFanControl:
  14  * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
  15  *
  16  * This program is free software; you can redistribute it and/or modify it
  17  * under the terms of the GNU General Public License v2 as published by the
  18  * Free Software Foundation.
  19  *
  20  * This program is distributed in the hope that it will be useful, but WITHOUT
  21  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  22  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  23  * more details.
  24  *
  25  * You should have received a copy of the GNU General Public License along with
  26  * this program; if not, write to the Free Software Foundation, Inc.,
  27  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  28  */
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/delay.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/input-polldev.h>
  35 #include <linux/kernel.h>
  36 #include <linux/slab.h>
  37 #include <linux/module.h>
  38 #include <linux/timer.h>
  39 #include <linux/dmi.h>
  40 #include <linux/mutex.h>
  41 #include <linux/hwmon-sysfs.h>
  42 #include <linux/io.h>
  43 #include <linux/leds.h>
  44 #include <linux/hwmon.h>
  45 #include <linux/workqueue.h>
  46 #include <linux/err.h>
  47
  48 /* data port used by Apple SMC */
  49 #define APPLESMC_DATA_PORT      0x300
  50 /* command/status port used by Apple SMC */
  51 #define APPLESMC_CMD_PORT       0x304
  52
  53 #define APPLESMC_NR_PORTS       32 /* 0x300-0x31f */
  54
  55 #define APPLESMC_MAX_DATA_LENGTH 32
  56
  57 /* wait up to 128 ms for a status change. */
  58 #define APPLESMC_MIN_WAIT       0x0010
  59 #define APPLESMC_RETRY_WAIT     0x0100
  60 #define APPLESMC_MAX_WAIT       0x20000
  61
  62 #define APPLESMC_READ_CMD       0x10
  63 #define APPLESMC_WRITE_CMD      0x11
  64 #define APPLESMC_GET_KEY_BY_INDEX_CMD   0x12
  65 #define APPLESMC_GET_KEY_TYPE_CMD       0x13
  66
  67 #define KEY_COUNT_KEY           "#KEY" /* r-o ui32 */
  68
  69 #define LIGHT_SENSOR_LEFT_KEY   "ALV0" /* r-o {alv (6-10 bytes) */
  70 #define LIGHT_SENSOR_RIGHT_KEY  "ALV1" /* r-o {alv (6-10 bytes) */
  71 #define BACKLIGHT_KEY           "LKSB" /* w-o {lkb (2 bytes) */
  72
  73 #define CLAMSHELL_KEY           "MSLD" /* r-o ui8 (unused) */
  74
  75 #define MOTION_SENSOR_X_KEY     "MO_X" /* r-o sp78 (2 bytes) */
  76 #define MOTION_SENSOR_Y_KEY     "MO_Y" /* r-o sp78 (2 bytes) */
  77 #define MOTION_SENSOR_Z_KEY     "MO_Z" /* r-o sp78 (2 bytes) */
  78 #define MOTION_SENSOR_KEY       "MOCN" /* r/w ui16 */
  79
  80 #define FANS_COUNT              "FNum" /* r-o ui8 */
  81 #define FANS_MANUAL             "FS! " /* r-w ui16 */
  82 #define FAN_ID_FMT              "F%dID" /* r-o char[16] */
  83
  84 #define TEMP_SENSOR_TYPE        "sp78"
  85
  86 /* List of keys used to read/write fan speeds */
  87 static const char *const fan_speed_fmt[] = {
  88         "F%dAc",                /* actual speed */
  89         "F%dMn",                /* minimum speed (rw) */
  90         "F%dMx",                /* maximum speed */
  91         "F%dSf",                /* safe speed - not all models */
  92         "F%dTg",                /* target speed (manual: rw) */
  93 };
  94
  95 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
  96 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
  97
  98 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
  99 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 100 #define APPLESMC_INPUT_FLAT     4
 101
 102 #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff)
 103 #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16)
 104
 105 /* Dynamic device node attributes */
 106 struct applesmc_dev_attr {
 107         struct sensor_device_attribute sda;     /* hwmon attributes */
 108         char name[32];                          /* room for node file name */
 109 };
 110
 111 /* Dynamic device node group */
 112 struct applesmc_node_group {
 113         char *format;                           /* format string */
 114         void *show;                             /* show function */
 115         void *store;                            /* store function */
 116         int option;                             /* function argument */
 117         struct applesmc_dev_attr *nodes;        /* dynamic node array */
 118 };
 119
 120 /* AppleSMC entry - cached register information */
 121 struct applesmc_entry {
 122         char key[5];            /* four-letter key code */
 123         u8 valid;               /* set when entry is successfully read once */
 124         u8 len;                 /* bounded by APPLESMC_MAX_DATA_LENGTH */
 125         char type[5];           /* four-letter type code */
 126         u8 flags;               /* 0x10: func; 0x40: write; 0x80: read */
 127 };
 128
 129 /* Register lookup and registers common to all SMCs */
 130 static struct applesmc_registers {
 131         struct mutex mutex;             /* register read/write mutex */
 132         unsigned int key_count;         /* number of SMC registers */
 133         unsigned int fan_count;         /* number of fans */
 134         unsigned int temp_count;        /* number of temperature registers */
 135         unsigned int temp_begin;        /* temperature lower index bound */
 136         unsigned int temp_end;          /* temperature upper index bound */
 137         unsigned int index_count;       /* size of temperature index array */
 138         int num_light_sensors;          /* number of light sensors */
 139         bool has_accelerometer;         /* has motion sensor */
 140         bool has_key_backlight;         /* has keyboard backlight */
 141         bool init_complete;             /* true when fully initialized */
 142         struct applesmc_entry *cache;   /* cached key entries */
 143         const char **index;             /* temperature key index */
 144 } smcreg = {
 145         .mutex = __MUTEX_INITIALIZER(smcreg.mutex),
 146 };
 147
 148 static const int debug;
 149 static struct platform_device *pdev;
 150 static s16 rest_x;
 151 static s16 rest_y;
 152 static u8 backlight_state[2];
 153
 154 static struct device *hwmon_dev;
 155 static struct input_polled_dev *applesmc_idev;
 156
 157 /*
 158  * Last index written to key_at_index sysfs file, and value to use for all other
 159  * key_at_index_* sysfs files.
 160  */
 161 static unsigned int key_at_index;
 162
 163 static struct workqueue_struct *applesmc_led_wq;
 164
 165 /*
 166  * wait_read - Wait for a byte to appear on SMC port. Callers must
 167  * hold applesmc_lock.
 168  */
 169 static int wait_read(void)
 170 {
 171         u8 status;
 172         int us;
 173         for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
 174                 udelay(us);
 175                 status = inb(APPLESMC_CMD_PORT);
 176                 /* read: wait for smc to settle */
 177                 if (status & 0x01)
 178                         return 0;
 179         }
 180
 181         pr_warn("wait_read() fail: 0x%02x\n", status);
 182         return -EIO;
 183 }
 184
 185 /*
 186  * send_byte - Write to SMC port, retrying when necessary. Callers
 187  * must hold applesmc_lock.
 188  */
 189 static int send_byte(u8 cmd, u16 port)
 190 {
 191         u8 status;
 192         int us;
 193
 194         outb(cmd, port);
 195         for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
 196                 udelay(us);
 197                 status = inb(APPLESMC_CMD_PORT);
 198                 /* write: wait for smc to settle */
 199                 if (status & 0x02)
 200                         continue;
 201                 /* ready: cmd accepted, return */
 202                 if (status & 0x04)
 203                         return 0;
 204                 /* timeout: give up */
 205                 if (us << 1 == APPLESMC_MAX_WAIT)
 206                         break;
 207                 /* busy: long wait and resend */
 208                 udelay(APPLESMC_RETRY_WAIT);
 209                 outb(cmd, port);
 210         }
 211
 212         pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status);
 213         return -EIO;
 214 }
 215
 216 static int send_command(u8 cmd)
 217 {
 218         return send_byte(cmd, APPLESMC_CMD_PORT);
 219 }
 220
 221 static int send_argument(const char *key)
 222 {
 223         int i;
 224
 225         for (i = 0; i < 4; i++)
 226                 if (send_byte(key[i], APPLESMC_DATA_PORT))
 227                         return -EIO;
 228         return 0;
 229 }
 230
 231 static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len)
 232 {
 233         int i;
 234
 235         if (send_command(cmd) || send_argument(key)) {
 236                 pr_warn("%.4s: read arg fail\n", key);
 237                 return -EIO;
 238         }
 239
 240         if (send_byte(len, APPLESMC_DATA_PORT)) {
 241                 pr_warn("%.4s: read len fail\n", key);
 242                 return -EIO;
 243         }
 244
 245         for (i = 0; i < len; i++) {
 246                 if (wait_read()) {
 247                         pr_warn("%.4s: read data[%d] fail\n", key, i);
 248                         return -EIO;
 249                 }
 250                 buffer[i] = inb(APPLESMC_DATA_PORT);
 251         }
 252
 253         return 0;
 254 }
 255
 256 static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len)
 257 {
 258         int i;
 259
 260         if (send_command(cmd) || send_argument(key)) {
 261                 pr_warn("%s: write arg fail\n", key);
 262                 return -EIO;
 263         }
 264
 265         if (send_byte(len, APPLESMC_DATA_PORT)) {
 266                 pr_warn("%.4s: write len fail\n", key);
 267                 return -EIO;
 268         }
 269
 270         for (i = 0; i < len; i++) {
 271                 if (send_byte(buffer[i], APPLESMC_DATA_PORT)) {
 272                         pr_warn("%s: write data fail\n", key);
 273                         return -EIO;
 274                 }
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int read_register_count(unsigned int *count)
 281 {
 282         __be32 be;
 283         int ret;
 284
 285         ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4);
 286         if (ret)
 287                 return ret;
 288
 289         *count = be32_to_cpu(be);
 290         return 0;
 291 }
 292
 293 /*
 294  * Serialized I/O
 295  *
 296  * Returns zero on success or a negative error on failure.
 297  * All functions below are concurrency safe - callers should NOT hold lock.
 298  */
 299
 300 static int applesmc_read_entry(const struct applesmc_entry *entry,
 301                                u8 *buf, u8 len)
 302 {
 303         int ret;
 304
 305         if (entry->len != len)
 306                 return -EINVAL;
 307         mutex_lock(&smcreg.mutex);
 308         ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len);
 309         mutex_unlock(&smcreg.mutex);
 310
 311         return ret;
 312 }
 313
 314 static int applesmc_write_entry(const struct applesmc_entry *entry,
 315                                 const u8 *buf, u8 len)
 316 {
 317         int ret;
 318
 319         if (entry->len != len)
 320                 return -EINVAL;
 321         mutex_lock(&smcreg.mutex);
 322         ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len);
 323         mutex_unlock(&smcreg.mutex);
 324         return ret;
 325 }
 326
 327 static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
 328 {
 329         struct applesmc_entry *cache = &smcreg.cache[index];
 330         u8 key[4], info[6];
 331         __be32 be;
 332         int ret = 0;
 333
 334         if (cache->valid)
 335                 return cache;
 336
 337         mutex_lock(&smcreg.mutex);
 338
 339         if (cache->valid)
 340                 goto out;
 341         be = cpu_to_be32(index);
 342         ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4);
 343         if (ret)
 344                 goto out;
 345         ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6);
 346         if (ret)
 347                 goto out;
 348
 349         memcpy(cache->key, key, 4);
 350         cache->len = info[0];
 351         memcpy(cache->type, &info[1], 4);
 352         cache->flags = info[5];
 353         cache->valid = 1;
 354
 355 out:
 356         mutex_unlock(&smcreg.mutex);
 357         if (ret)
 358                 return ERR_PTR(ret);
 359         return cache;
 360 }
 361
 362 static int applesmc_get_lower_bound(unsigned int *lo, const char *key)
 363 {
 364         int begin = 0, end = smcreg.key_count;
 365         const struct applesmc_entry *entry;
 366
 367         while (begin != end) {
 368                 int middle = begin + (end - begin) / 2;
 369                 entry = applesmc_get_entry_by_index(middle);
 370                 if (IS_ERR(entry)) {
 371                         *lo = 0;
 372                         return PTR_ERR(entry);
 373                 }
 374                 if (strcmp(entry->key, key) < 0)
 375                         begin = middle + 1;
 376                 else
 377                         end = middle;
 378         }
 379
 380         *lo = begin;
 381         return 0;
 382 }
 383
 384 static int applesmc_get_upper_bound(unsigned int *hi, const char *key)
 385 {
 386         int begin = 0, end = smcreg.key_count;
 387         const struct applesmc_entry *entry;
 388
 389         while (begin != end) {
 390                 int middle = begin + (end - begin) / 2;
 391                 entry = applesmc_get_entry_by_index(middle);
 392                 if (IS_ERR(entry)) {
 393                         *hi = smcreg.key_count;
 394                         return PTR_ERR(entry);
 395                 }
 396                 if (strcmp(key, entry->key) < 0)
 397                         end = middle;
 398                 else
 399                         begin = middle + 1;
 400         }
 401
 402         *hi = begin;
 403         return 0;
 404 }
 405
 406 static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key)
 407 {
 408         int begin, end;
 409         int ret;
 410
 411         ret = applesmc_get_lower_bound(&begin, key);
 412         if (ret)
 413                 return ERR_PTR(ret);
 414         ret = applesmc_get_upper_bound(&end, key);
 415         if (ret)
 416                 return ERR_PTR(ret);
 417         if (end - begin != 1)
 418                 return ERR_PTR(-EINVAL);
 419
 420         return applesmc_get_entry_by_index(begin);
 421 }
 422
 423 static int applesmc_read_key(const char *key, u8 *buffer, u8 len)
 424 {
 425         const struct applesmc_entry *entry;
 426
 427         entry = applesmc_get_entry_by_key(key);
 428         if (IS_ERR(entry))
 429                 return PTR_ERR(entry);
 430
 431         return applesmc_read_entry(entry, buffer, len);
 432 }
 433
 434 static int applesmc_write_key(const char *key, const u8 *buffer, u8 len)
 435 {
 436         const struct applesmc_entry *entry;
 437
 438         entry = applesmc_get_entry_by_key(key);
 439         if (IS_ERR(entry))
 440                 return PTR_ERR(entry);
 441
 442         return applesmc_write_entry(entry, buffer, len);
 443 }
 444
 445 static int applesmc_has_key(const char *key, bool *value)
 446 {
 447         const struct applesmc_entry *entry;
 448
 449         entry = applesmc_get_entry_by_key(key);
 450         if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL)
 451                 return PTR_ERR(entry);
 452
 453         *value = !IS_ERR(entry);
 454         return 0;
 455 }
 456
 457 /*
 458  * applesmc_read_s16 - Read 16-bit signed big endian register
 459  */
 460 static int applesmc_read_s16(const char *key, s16 *value)
 461 {
 462         u8 buffer[2];
 463         int ret;
 464
 465         ret = applesmc_read_key(key, buffer, 2);
 466         if (ret)
 467                 return ret;
 468
 469         *value = ((s16)buffer[0] << 8) | buffer[1];
 470         return 0;
 471 }
 472
 473 /*
 474  * applesmc_device_init - initialize the accelerometer.  Can sleep.
 475  */
 476 static void applesmc_device_init(void)
 477 {
 478         int total;
 479         u8 buffer[2];
 480
 481         if (!smcreg.has_accelerometer)
 482                 return;
 483
 484         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 485                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 486                                 (buffer[0] != 0x00 || buffer[1] != 0x00))
 487                         return;
 488                 buffer[0] = 0xe0;
 489                 buffer[1] = 0x00;
 490                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 491                 msleep(INIT_WAIT_MSECS);
 492         }
 493
 494         pr_warn("failed to init the device\n");
 495 }
 496
 497 static int applesmc_init_index(struct applesmc_registers *s)
 498 {
 499         const struct applesmc_entry *entry;
 500         unsigned int i;
 501
 502         if (s->index)
 503                 return 0;
 504
 505         s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL);
 506         if (!s->index)
 507                 return -ENOMEM;
 508
 509         for (i = s->temp_begin; i < s->temp_end; i++) {
 510                 entry = applesmc_get_entry_by_index(i);
 511                 if (IS_ERR(entry))
 512                         continue;
 513                 if (strcmp(entry->type, TEMP_SENSOR_TYPE))
 514                         continue;
 515                 s->index[s->index_count++] = entry->key;
 516         }
 517
 518         return 0;
 519 }
 520
 521 /*
 522  * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent.
 523  */
 524 static int applesmc_init_smcreg_try(void)
 525 {
 526         struct applesmc_registers *s = &smcreg;
 527         bool left_light_sensor, right_light_sensor;
 528         unsigned int count;
 529         u8 tmp[1];
 530         int ret;
 531
 532         if (s->init_complete)
 533                 return 0;
 534
 535         ret = read_register_count(&count);
 536         if (ret)
 537                 return ret;
 538
 539         if (s->cache && s->key_count != count) {
 540                 pr_warn("key count changed from %d to %d\n",
 541                         s->key_count, count);
 542                 kfree(s->cache);
 543                 s->cache = NULL;
 544         }
 545         s->key_count = count;
 546
 547         if (!s->cache)
 548                 s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL);
 549         if (!s->cache)
 550                 return -ENOMEM;
 551
 552         ret = applesmc_read_key(FANS_COUNT, tmp, 1);
 553         if (ret)
 554                 return ret;
 555         s->fan_count = tmp[0];
 556
 557         ret = applesmc_get_lower_bound(&s->temp_begin, "T");
 558         if (ret)
 559                 return ret;
 560         ret = applesmc_get_lower_bound(&s->temp_end, "U");
 561         if (ret)
 562                 return ret;
 563         s->temp_count = s->temp_end - s->temp_begin;
 564
 565         ret = applesmc_init_index(s);
 566         if (ret)
 567                 return ret;
 568
 569         ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor);
 570         if (ret)
 571                 return ret;
 572         ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor);
 573         if (ret)
 574                 return ret;
 575         ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer);
 576         if (ret)
 577                 return ret;
 578         ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight);
 579         if (ret)
 580                 return ret;
 581
 582         s->num_light_sensors = left_light_sensor + right_light_sensor;
 583         s->init_complete = true;
 584
 585         pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n",
 586                s->key_count, s->fan_count, s->temp_count, s->index_count,
 587                s->has_accelerometer,
 588                s->num_light_sensors,
 589                s->has_key_backlight);
 590
 591         return 0;
 592 }
 593
 594 static void applesmc_destroy_smcreg(void)
 595 {
 596         kfree(smcreg.index);
 597         smcreg.index = NULL;
 598         kfree(smcreg.cache);
 599         smcreg.cache = NULL;
 600         smcreg.init_complete = false;
 601 }
 602
 603 /*
 604  * applesmc_init_smcreg - Initialize register cache.
 605  *
 606  * Retries until initialization is successful, or the operation times out.
 607  *
 608  */
 609 static int applesmc_init_smcreg(void)
 610 {
 611         int ms, ret;
 612
 613         for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) {
 614                 ret = applesmc_init_smcreg_try();
 615                 if (!ret) {
 616                         if (ms)
 617                                 pr_info("init_smcreg() took %d ms\n", ms);
 618                         return 0;
 619                 }
 620                 msleep(INIT_WAIT_MSECS);
 621         }
 622
 623         applesmc_destroy_smcreg();
 624
 625         return ret;
 626 }
 627
 628 /* Device model stuff */
 629 static int applesmc_probe(struct platform_device *dev)
 630 {
 631         int ret;
 632
 633         ret = applesmc_init_smcreg();
 634         if (ret)
 635                 return ret;
 636
 637         applesmc_device_init();
 638
 639         return 0;
 640 }
 641
 642 /* Synchronize device with memorized backlight state */
 643 static int applesmc_pm_resume(struct device *dev)
 644 {
 645         if (smcreg.has_key_backlight)
 646                 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
 647         return 0;
 648 }
 649
 650 /* Reinitialize device on resume from hibernation */
 651 static int applesmc_pm_restore(struct device *dev)
 652 {
 653         applesmc_device_init();
 654         return applesmc_pm_resume(dev);
 655 }
 656
 657 static const struct dev_pm_ops applesmc_pm_ops = {
 658         .resume = applesmc_pm_resume,
 659         .restore = applesmc_pm_restore,
 660 };
 661
 662 static struct platform_driver applesmc_driver = {
 663         .probe = applesmc_probe,
 664         .driver = {
 665                 .name = "applesmc",
 666                 .owner = THIS_MODULE,
 667                 .pm = &applesmc_pm_ops,
 668         },
 669 };
 670
 671 /*
 672  * applesmc_calibrate - Set our "resting" values.  Callers must
 673  * hold applesmc_lock.
 674  */
 675 static void applesmc_calibrate(void)
 676 {
 677         applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x);
 678         applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y);
 679         rest_x = -rest_x;
 680 }
 681
 682 static void applesmc_idev_poll(struct input_polled_dev *dev)
 683 {
 684         struct input_dev *idev = dev->input;
 685         s16 x, y;
 686
 687         if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x))
 688                 return;
 689         if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y))
 690                 return;
 691
 692         x = -x;
 693         input_report_abs(idev, ABS_X, x - rest_x);
 694         input_report_abs(idev, ABS_Y, y - rest_y);
 695         input_sync(idev);
 696 }
 697
 698 /* Sysfs Files */
 699
 700 static ssize_t applesmc_name_show(struct device *dev,
 701                                    struct device_attribute *attr, char *buf)
 702 {
 703         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 704 }
 705
 706 static ssize_t applesmc_position_show(struct device *dev,
 707                                    struct device_attribute *attr, char *buf)
 708 {
 709         int ret;
 710         s16 x, y, z;
 711
 712         ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x);
 713         if (ret)
 714                 goto out;
 715         ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y);
 716         if (ret)
 717                 goto out;
 718         ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z);
 719         if (ret)
 720                 goto out;
 721
 722 out:
 723         if (ret)
 724                 return ret;
 725         else
 726                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 727 }
 728
 729 static ssize_t applesmc_light_show(struct device *dev,
 730                                 struct device_attribute *attr, char *sysfsbuf)
 731 {
 732         const struct applesmc_entry *entry;
 733         static int data_length;
 734         int ret;
 735         u8 left = 0, right = 0;
 736         u8 buffer[10];
 737
 738         if (!data_length) {
 739                 entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY);
 740                 if (IS_ERR(entry))
 741                         return PTR_ERR(entry);
 742                 if (entry->len > 10)
 743                         return -ENXIO;
 744                 data_length = entry->len;
 745                 pr_info("light sensor data length set to %d\n", data_length);
 746         }
 747
 748         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
 749         /* newer macbooks report a single 10-bit bigendian value */
 750         if (data_length == 10) {
 751                 left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
 752                 goto out;
 753         }
 754         left = buffer[2];
 755         if (ret)
 756                 goto out;
 757         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
 758         right = buffer[2];
 759
 760 out:
 761         if (ret)
 762                 return ret;
 763         else
 764                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 765 }
 766
 767 /* Displays sensor key as label */
 768 static ssize_t applesmc_show_sensor_label(struct device *dev,
 769                         struct device_attribute *devattr, char *sysfsbuf)
 770 {
 771         const char *key = smcreg.index[to_index(devattr)];
 772
 773         return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 774 }
 775
 776 /* Displays degree Celsius * 1000 */
 777 static ssize_t applesmc_show_temperature(struct device *dev,
 778                         struct device_attribute *devattr, char *sysfsbuf)
 779 {
 780         const char *key = smcreg.index[to_index(devattr)];
 781         int ret;
 782         s16 value;
 783         int temp;
 784
 785         ret = applesmc_read_s16(key, &value);
 786         if (ret)
 787                 return ret;
 788
 789         temp = 250 * (value >> 6);
 790
 791         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp);
 792 }
 793
 794 static ssize_t applesmc_show_fan_speed(struct device *dev,
 795                                 struct device_attribute *attr, char *sysfsbuf)
 796 {
 797         int ret;
 798         unsigned int speed = 0;
 799         char newkey[5];
 800         u8 buffer[2];
 801
 802         sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
 803
 804         ret = applesmc_read_key(newkey, buffer, 2);
 805         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 806
 807         if (ret)
 808                 return ret;
 809         else
 810                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 811 }
 812
 813 static ssize_t applesmc_store_fan_speed(struct device *dev,
 814                                         struct device_attribute *attr,
 815                                         const char *sysfsbuf, size_t count)
 816 {
 817         int ret;
 818         unsigned long speed;
 819         char newkey[5];
 820         u8 buffer[2];
 821
 822         if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000)
 823                 return -EINVAL;         /* Bigger than a 14-bit value */
 824
 825         sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
 826
 827         buffer[0] = (speed >> 6) & 0xff;
 828         buffer[1] = (speed << 2) & 0xff;
 829         ret = applesmc_write_key(newkey, buffer, 2);
 830
 831         if (ret)
 832                 return ret;
 833         else
 834                 return count;
 835 }
 836
 837 static ssize_t applesmc_show_fan_manual(struct device *dev,
 838                         struct device_attribute *attr, char *sysfsbuf)
 839 {
 840         int ret;
 841         u16 manual = 0;
 842         u8 buffer[2];
 843
 844         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 845         manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
 846
 847         if (ret)
 848                 return ret;
 849         else
 850                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 851 }
 852
 853 static ssize_t applesmc_store_fan_manual(struct device *dev,
 854                                          struct device_attribute *attr,
 855                                          const char *sysfsbuf, size_t count)
 856 {
 857         int ret;
 858         u8 buffer[2];
 859         unsigned long input;
 860         u16 val;
 861
 862         if (kstrtoul(sysfsbuf, 10, &input) < 0)
 863                 return -EINVAL;
 864
 865         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 866         val = (buffer[0] << 8 | buffer[1]);
 867         if (ret)
 868                 goto out;
 869
 870         if (input)
 871                 val = val | (0x01 << to_index(attr));
 872         else
 873                 val = val & ~(0x01 << to_index(attr));
 874
 875         buffer[0] = (val >> 8) & 0xFF;
 876         buffer[1] = val & 0xFF;
 877
 878         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 879
 880 out:
 881         if (ret)
 882                 return ret;
 883         else
 884                 return count;
 885 }
 886
 887 static ssize_t applesmc_show_fan_position(struct device *dev,
 888                                 struct device_attribute *attr, char *sysfsbuf)
 889 {
 890         int ret;
 891         char newkey[5];
 892         u8 buffer[17];
 893
 894         sprintf(newkey, FAN_ID_FMT, to_index(attr));
 895
 896         ret = applesmc_read_key(newkey, buffer, 16);
 897         buffer[16] = 0;
 898
 899         if (ret)
 900                 return ret;
 901         else
 902                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 903 }
 904
 905 static ssize_t applesmc_calibrate_show(struct device *dev,
 906                                 struct device_attribute *attr, char *sysfsbuf)
 907 {
 908         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 909 }
 910
 911 static ssize_t applesmc_calibrate_store(struct device *dev,
 912         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 913 {
 914         applesmc_calibrate();
 915
 916         return count;
 917 }
 918
 919 static void applesmc_backlight_set(struct work_struct *work)
 920 {
 921         applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
 922 }
 923 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 924
 925 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 926                                                 enum led_brightness value)
 927 {
 928         int ret;
 929
 930         backlight_state[0] = value;
 931         ret = queue_work(applesmc_led_wq, &backlight_work);
 932
 933         if (debug && (!ret))
 934                 dev_dbg(led_cdev->dev, "work was already on the queue.\n");
 935 }
 936
 937 static ssize_t applesmc_key_count_show(struct device *dev,
 938                                 struct device_attribute *attr, char *sysfsbuf)
 939 {
 940         int ret;
 941         u8 buffer[4];
 942         u32 count;
 943
 944         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 945         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 946                                                 ((u32)buffer[2]<<8) + buffer[3];
 947
 948         if (ret)
 949                 return ret;
 950         else
 951                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 952 }
 953
 954 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 955                                 struct device_attribute *attr, char *sysfsbuf)
 956 {
 957         const struct applesmc_entry *entry;
 958         int ret;
 959
 960         entry = applesmc_get_entry_by_index(key_at_index);
 961         if (IS_ERR(entry))
 962                 return PTR_ERR(entry);
 963         ret = applesmc_read_entry(entry, sysfsbuf, entry->len);
 964         if (ret)
 965                 return ret;
 966
 967         return entry->len;
 968 }
 969
 970 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 971                                 struct device_attribute *attr, char *sysfsbuf)
 972 {
 973         const struct applesmc_entry *entry;
 974
 975         entry = applesmc_get_entry_by_index(key_at_index);
 976         if (IS_ERR(entry))
 977                 return PTR_ERR(entry);
 978
 979         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len);
 980 }
 981
 982 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 983                                 struct device_attribute *attr, char *sysfsbuf)
 984 {
 985         const struct applesmc_entry *entry;
 986
 987         entry = applesmc_get_entry_by_index(key_at_index);
 988         if (IS_ERR(entry))
 989                 return PTR_ERR(entry);
 990
 991         return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type);
 992 }
 993
 994 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 995                                 struct device_attribute *attr, char *sysfsbuf)
 996 {
 997         const struct applesmc_entry *entry;
 998
 999         entry = applesmc_get_entry_by_index(key_at_index);
1000         if (IS_ERR(entry))
1001                 return PTR_ERR(entry);
1002
1003         return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key);
1004 }
1005
1006 static ssize_t applesmc_key_at_index_show(struct device *dev,
1007                                 struct device_attribute *attr, char *sysfsbuf)
1008 {
1009         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
1010 }
1011
1012 static ssize_t applesmc_key_at_index_store(struct device *dev,
1013         struct device_attribute *attr, const char *sysfsbuf, size_t count)
1014 {
1015         unsigned long newkey;
1016
1017         if (kstrtoul(sysfsbuf, 10, &newkey) < 0
1018             || newkey >= smcreg.key_count)
1019                 return -EINVAL;
1020
1021         key_at_index = newkey;
1022         return count;
1023 }
1024
1025 static struct led_classdev applesmc_backlight = {
1026         .name                   = "smc::kbd_backlight",
1027         .default_trigger        = "nand-disk",
1028         .brightness_set         = applesmc_brightness_set,
1029 };
1030
1031 static struct applesmc_node_group info_group[] = {
1032         { "name", applesmc_name_show },
1033         { "key_count", applesmc_key_count_show },
1034         { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store },
1035         { "key_at_index_name", applesmc_key_at_index_name_show },
1036         { "key_at_index_type", applesmc_key_at_index_type_show },
1037         { "key_at_index_data_length", applesmc_key_at_index_data_length_show },
1038         { "key_at_index_data", applesmc_key_at_index_read_show },
1039         { }
1040 };
1041
1042 static struct applesmc_node_group accelerometer_group[] = {
1043         { "position", applesmc_position_show },
1044         { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store },
1045         { }
1046 };
1047
1048 static struct applesmc_node_group light_sensor_group[] = {
1049         { "light", applesmc_light_show },
1050         { }
1051 };
1052
1053 static struct applesmc_node_group fan_group[] = {
1054         { "fan%d_label", applesmc_show_fan_position },
1055         { "fan%d_input", applesmc_show_fan_speed, NULL, 0 },
1056         { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 },
1057         { "fan%d_max", applesmc_show_fan_speed, NULL, 2 },
1058         { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 },
1059         { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 },
1060         { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual },
1061         { }
1062 };
1063
1064 static struct applesmc_node_group temp_group[] = {
1065         { "temp%d_label", applesmc_show_sensor_label },
1066         { "temp%d_input", applesmc_show_temperature },
1067         { }
1068 };
1069
1070 /* Module stuff */
1071
1072 /*
1073  * applesmc_destroy_nodes - remove files and free associated memory
1074  */
1075 static void applesmc_destroy_nodes(struct applesmc_node_group *groups)
1076 {
1077         struct applesmc_node_group *grp;
1078         struct applesmc_dev_attr *node;
1079
1080         for (grp = groups; grp->nodes; grp++) {
1081                 for (node = grp->nodes; node->sda.dev_attr.attr.name; node++)
1082                         sysfs_remove_file(&pdev->dev.kobj,
1083                                           &node->sda.dev_attr.attr);
1084                 kfree(grp->nodes);
1085                 grp->nodes = NULL;
1086         }
1087 }
1088
1089 /*
1090  * applesmc_create_nodes - create a two-dimensional group of sysfs files
1091  */
1092 static int applesmc_create_nodes(struct applesmc_node_group *groups, int num)
1093 {
1094         struct applesmc_node_group *grp;
1095         struct applesmc_dev_attr *node;
1096         struct attribute *attr;
1097         int ret, i;
1098
1099         for (grp = groups; grp->format; grp++) {
1100                 grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL);
1101                 if (!grp->nodes) {
1102                         ret = -ENOMEM;
1103                         goto out;
1104                 }
1105                 for (i = 0; i < num; i++) {
1106                         node = &grp->nodes[i];
1107                         sprintf(node->name, grp->format, i + 1);
1108                         node->sda.index = (grp->option << 16) | (i & 0xffff);
1109                         node->sda.dev_attr.show = grp->show;
1110                         node->sda.dev_attr.store = grp->store;
1111                         attr = &node->sda.dev_attr.attr;
1112                         sysfs_attr_init(attr);
1113                         attr->name = node->name;
1114                         attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0);
1115                         ret = sysfs_create_file(&pdev->dev.kobj, attr);
1116                         if (ret) {
1117                                 attr->name = NULL;
1118                                 goto out;
1119                         }
1120                 }
1121         }
1122
1123         return 0;
1124 out:
1125         applesmc_destroy_nodes(groups);
1126         return ret;
1127 }
1128
1129 /* Create accelerometer ressources */
1130 static int applesmc_create_accelerometer(void)
1131 {
1132         struct input_dev *idev;
1133         int ret;
1134
1135         if (!smcreg.has_accelerometer)
1136                 return 0;
1137
1138         ret = applesmc_create_nodes(accelerometer_group, 1);
1139         if (ret)
1140                 goto out;
1141
1142         applesmc_idev = input_allocate_polled_device();
1143         if (!applesmc_idev) {
1144                 ret = -ENOMEM;
1145                 goto out_sysfs;
1146         }
1147
1148         applesmc_idev->poll = applesmc_idev_poll;
1149         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1150
1151         /* initial calibrate for the input device */
1152         applesmc_calibrate();
1153
1154         /* initialize the input device */
1155         idev = applesmc_idev->input;
1156         idev->name = "applesmc";
1157         idev->id.bustype = BUS_HOST;
1158         idev->dev.parent = &pdev->dev;
1159         idev->evbit[0] = BIT_MASK(EV_ABS);
1160         input_set_abs_params(idev, ABS_X,
1161                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1162         input_set_abs_params(idev, ABS_Y,
1163                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1164
1165         ret = input_register_polled_device(applesmc_idev);
1166         if (ret)
1167                 goto out_idev;
1168
1169         return 0;
1170
1171 out_idev:
1172         input_free_polled_device(applesmc_idev);
1173
1174 out_sysfs:
1175         applesmc_destroy_nodes(accelerometer_group);
1176
1177 out:
1178         pr_warn("driver init failed (ret=%d)!\n", ret);
1179         return ret;
1180 }
1181
1182 /* Release all ressources used by the accelerometer */
1183 static void applesmc_release_accelerometer(void)
1184 {
1185         if (!smcreg.has_accelerometer)
1186                 return;
1187         input_unregister_polled_device(applesmc_idev);
1188         input_free_polled_device(applesmc_idev);
1189         applesmc_destroy_nodes(accelerometer_group);
1190 }
1191
1192 static int applesmc_create_light_sensor(void)
1193 {
1194         if (!smcreg.num_light_sensors)
1195                 return 0;
1196         return applesmc_create_nodes(light_sensor_group, 1);
1197 }
1198
1199 static void applesmc_release_light_sensor(void)
1200 {
1201         if (!smcreg.num_light_sensors)
1202                 return;
1203         applesmc_destroy_nodes(light_sensor_group);
1204 }
1205
1206 static int applesmc_create_key_backlight(void)
1207 {
1208         if (!smcreg.has_key_backlight)
1209                 return 0;
1210         applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1211         if (!applesmc_led_wq)
1212                 return -ENOMEM;
1213         return led_classdev_register(&pdev->dev, &applesmc_backlight);
1214 }
1215
1216 static void applesmc_release_key_backlight(void)
1217 {
1218         if (!smcreg.has_key_backlight)
1219                 return;
1220         led_classdev_unregister(&applesmc_backlight);
1221         destroy_workqueue(applesmc_led_wq);
1222 }
1223
1224 static int applesmc_dmi_match(const struct dmi_system_id *id)
1225 {
1226         return 1;
1227 }
1228
1229 /*
1230  * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1231  * So we need to put "Apple MacBook Pro" before "Apple MacBook".
1232  */
1233 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1234         { applesmc_dmi_match, "Apple MacBook Air", {
1235           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1236           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1237         },
1238         { applesmc_dmi_match, "Apple MacBook Pro", {
1239           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1240           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") },
1241         },
1242         { applesmc_dmi_match, "Apple MacBook", {
1243           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1244           DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") },
1245         },
1246         { applesmc_dmi_match, "Apple Macmini", {
1247           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1248           DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") },
1249         },
1250         { applesmc_dmi_match, "Apple MacPro", {
1251           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1252           DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") },
1253         },
1254         { applesmc_dmi_match, "Apple iMac", {
1255           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1256           DMI_MATCH(DMI_PRODUCT_NAME, "iMac") },
1257         },
1258         { .ident = NULL }
1259 };
1260
1261 static int __init applesmc_init(void)
1262 {
1263         int ret;
1264
1265         if (!dmi_check_system(applesmc_whitelist)) {
1266                 pr_warn("supported laptop not found!\n");
1267                 ret = -ENODEV;
1268                 goto out;
1269         }
1270
1271         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1272                                                                 "applesmc")) {
1273                 ret = -ENXIO;
1274                 goto out;
1275         }
1276
1277         ret = platform_driver_register(&applesmc_driver);
1278         if (ret)
1279                 goto out_region;
1280
1281         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1282                                                NULL, 0);
1283         if (IS_ERR(pdev)) {
1284                 ret = PTR_ERR(pdev);
1285                 goto out_driver;
1286         }
1287
1288         /* create register cache */
1289         ret = applesmc_init_smcreg();
1290         if (ret)
1291                 goto out_device;
1292
1293         ret = applesmc_create_nodes(info_group, 1);
1294         if (ret)
1295                 goto out_smcreg;
1296
1297         ret = applesmc_create_nodes(fan_group, smcreg.fan_count);
1298         if (ret)
1299                 goto out_info;
1300
1301         ret = applesmc_create_nodes(temp_group, smcreg.index_count);
1302         if (ret)
1303                 goto out_fans;
1304
1305         ret = applesmc_create_accelerometer();
1306         if (ret)
1307                 goto out_temperature;
1308
1309         ret = applesmc_create_light_sensor();
1310         if (ret)
1311                 goto out_accelerometer;
1312
1313         ret = applesmc_create_key_backlight();
1314         if (ret)
1315                 goto out_light_sysfs;
1316
1317         hwmon_dev = hwmon_device_register(&pdev->dev);
1318         if (IS_ERR(hwmon_dev)) {
1319                 ret = PTR_ERR(hwmon_dev);
1320                 goto out_light_ledclass;
1321         }
1322
1323         return 0;
1324
1325 out_light_ledclass:
1326         applesmc_release_key_backlight();
1327 out_light_sysfs:
1328         applesmc_release_light_sensor();
1329 out_accelerometer:
1330         applesmc_release_accelerometer();
1331 out_temperature:
1332         applesmc_destroy_nodes(temp_group);
1333 out_fans:
1334         applesmc_destroy_nodes(fan_group);
1335 out_info:
1336         applesmc_destroy_nodes(info_group);
1337 out_smcreg:
1338         applesmc_destroy_smcreg();
1339 out_device:
1340         platform_device_unregister(pdev);
1341 out_driver:
1342         platform_driver_unregister(&applesmc_driver);
1343 out_region:
1344         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1345 out:
1346         pr_warn("driver init failed (ret=%d)!\n", ret);
1347         return ret;
1348 }
1349
1350 static void __exit applesmc_exit(void)
1351 {
1352         hwmon_device_unregister(hwmon_dev);
1353         applesmc_release_key_backlight();
1354         applesmc_release_light_sensor();
1355         applesmc_release_accelerometer();
1356         applesmc_destroy_nodes(temp_group);
1357         applesmc_destroy_nodes(fan_group);
1358         applesmc_destroy_nodes(info_group);
1359         applesmc_destroy_smcreg();
1360         platform_device_unregister(pdev);
1361         platform_driver_unregister(&applesmc_driver);
1362         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1363 }
1364
1365 module_init(applesmc_init);
1366 module_exit(applesmc_exit);
1367
1368 MODULE_AUTHOR("Nicolas Boichat");
1369 MODULE_DESCRIPTION("Apple SMC");
1370 MODULE_LICENSE("GPL v2");
1371 MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);