drivers/hwmon/applesmc.c

   1 /*
   2  * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
   3  * sensors, fan control, keyboard backlight control) used in Intel-based Apple
   4  * computers.
   5  *
   6  * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
   7  *
   8  * Based on hdaps.c driver:
   9  * Copyright (C) 2005 Robert Love <rml@novell.com>
  10  * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
  11  *
  12  * Fan control based on smcFanControl:
  13  * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU General Public License v2 as published by the
  17  * Free Software Foundation.
  18  *
  19  * This program is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  22  * more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along with
  25  * this program; if not, write to the Free Software Foundation, Inc.,
  26  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  27  */
  28
  29 #include <linux/delay.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/input-polldev.h>
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/timer.h>
  35 #include <linux/dmi.h>
  36 #include <linux/mutex.h>
  37 #include <linux/hwmon-sysfs.h>
  38 #include <asm/io.h>
  39 #include <linux/leds.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/workqueue.h>
  42
  43 /* data port used by Apple SMC */
  44 #define APPLESMC_DATA_PORT      0x300
  45 /* command/status port used by Apple SMC */
  46 #define APPLESMC_CMD_PORT       0x304
  47
  48 #define APPLESMC_NR_PORTS       32 /* 0x300-0x31f */
  49
  50 #define APPLESMC_MAX_DATA_LENGTH 32
  51
  52 #define APPLESMC_STATUS_MASK    0x0f
  53 #define APPLESMC_READ_CMD       0x10
  54 #define APPLESMC_WRITE_CMD      0x11
  55 #define APPLESMC_GET_KEY_BY_INDEX_CMD   0x12
  56 #define APPLESMC_GET_KEY_TYPE_CMD       0x13
  57
  58 #define KEY_COUNT_KEY           "#KEY" /* r-o ui32 */
  59
  60 #define LIGHT_SENSOR_LEFT_KEY   "ALV0" /* r-o {alv (6 bytes) */
  61 #define LIGHT_SENSOR_RIGHT_KEY  "ALV1" /* r-o {alv (6 bytes) */
  62 #define BACKLIGHT_KEY           "LKSB" /* w-o {lkb (2 bytes) */
  63
  64 #define CLAMSHELL_KEY           "MSLD" /* r-o ui8 (unused) */
  65
  66 #define MOTION_SENSOR_X_KEY     "MO_X" /* r-o sp78 (2 bytes) */
  67 #define MOTION_SENSOR_Y_KEY     "MO_Y" /* r-o sp78 (2 bytes) */
  68 #define MOTION_SENSOR_Z_KEY     "MO_Z" /* r-o sp78 (2 bytes) */
  69 #define MOTION_SENSOR_KEY       "MOCN" /* r/w ui16 */
  70
  71 #define FANS_COUNT              "FNum" /* r-o ui8 */
  72 #define FANS_MANUAL             "FS! " /* r-w ui16 */
  73 #define FAN_ACTUAL_SPEED        "F0Ac" /* r-o fpe2 (2 bytes) */
  74 #define FAN_MIN_SPEED           "F0Mn" /* r-o fpe2 (2 bytes) */
  75 #define FAN_MAX_SPEED           "F0Mx" /* r-o fpe2 (2 bytes) */
  76 #define FAN_SAFE_SPEED          "F0Sf" /* r-o fpe2 (2 bytes) */
  77 #define FAN_TARGET_SPEED        "F0Tg" /* r-w fpe2 (2 bytes) */
  78 #define FAN_POSITION            "F0ID" /* r-o char[16] */
  79
  80 /*
  81  * Temperature sensors keys (sp78 - 2 bytes).
  82  */
  83 static const char* temperature_sensors_sets[][36] = {
  84 /* Set 0: Macbook Pro */
  85         { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
  86           "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
  87 /* Set 1: Macbook2 set */
  88         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "TTF0", "Th0H",
  89           "Th0S", "Th1H", NULL },
  90 /* Set 2: Macbook set */
  91         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S",
  92           "Th1H", "Ts0P", NULL },
  93 /* Set 3: Macmini set */
  94         { "TC0D", "TC0P", NULL },
  95 /* Set 4: Mac Pro (2 x Quad-Core) */
  96         { "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
  97           "TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "THTG", "TH0P",
  98           "TH1P", "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S",
  99           "TM1P", "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P",
 100           "TM9S", "TN0H", "TS0C", NULL },
 101 };
 102
 103 /* List of keys used to read/write fan speeds */
 104 static const char* fan_speed_keys[] = {
 105         FAN_ACTUAL_SPEED,
 106         FAN_MIN_SPEED,
 107         FAN_MAX_SPEED,
 108         FAN_SAFE_SPEED,
 109         FAN_TARGET_SPEED
 110 };
 111
 112 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
 113 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
 114
 115 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
 116 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 117 #define APPLESMC_INPUT_FLAT     4
 118
 119 #define SENSOR_X 0
 120 #define SENSOR_Y 1
 121 #define SENSOR_Z 2
 122
 123 /* Structure to be passed to DMI_MATCH function */
 124 struct dmi_match_data {
 125 /* Indicates whether this computer has an accelerometer. */
 126         int accelerometer;
 127 /* Indicates whether this computer has light sensors and keyboard backlight. */
 128         int light;
 129 /* Indicates which temperature sensors set to use. */
 130         int temperature_set;
 131 };
 132
 133 static const int debug;
 134 static struct platform_device *pdev;
 135 static s16 rest_x;
 136 static s16 rest_y;
 137 static struct device *hwmon_dev;
 138 static struct input_polled_dev *applesmc_idev;
 139
 140 /* Indicates whether this computer has an accelerometer. */
 141 static unsigned int applesmc_accelerometer;
 142
 143 /* Indicates whether this computer has light sensors and keyboard backlight. */
 144 static unsigned int applesmc_light;
 145
 146 /* Indicates which temperature sensors set to use. */
 147 static unsigned int applesmc_temperature_set;
 148
 149 static DEFINE_MUTEX(applesmc_lock);
 150
 151 /*
 152  * Last index written to key_at_index sysfs file, and value to use for all other
 153  * key_at_index_* sysfs files.
 154  */
 155 static unsigned int key_at_index;
 156
 157 static struct workqueue_struct *applesmc_led_wq;
 158
 159 /*
 160  * __wait_status - Wait up to 2ms for the status port to get a certain value
 161  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 162  * hold applesmc_lock.
 163  */
 164 static int __wait_status(u8 val)
 165 {
 166         unsigned int i;
 167
 168         val = val & APPLESMC_STATUS_MASK;
 169
 170         for (i = 0; i < 200; i++) {
 171                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
 172                         if (debug)
 173                                 printk(KERN_DEBUG
 174                                                 "Waited %d us for status %x\n",
 175                                                 i*10, val);
 176                         return 0;
 177                 }
 178                 udelay(10);
 179         }
 180
 181         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
 182                                                 val, inb(APPLESMC_CMD_PORT));
 183
 184         return -EIO;
 185 }
 186
 187 /*
 188  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 189  * Returns zero on success or a negative error on failure. Callers must
 190  * hold applesmc_lock.
 191  */
 192 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
 193 {
 194         int i;
 195
 196         if (len > APPLESMC_MAX_DATA_LENGTH) {
 197                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
 198                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 199                 return -EINVAL;
 200         }
 201
 202         outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT);
 203         if (__wait_status(0x0c))
 204                 return -EIO;
 205
 206         for (i = 0; i < 4; i++) {
 207                 outb(key[i], APPLESMC_DATA_PORT);
 208                 if (__wait_status(0x04))
 209                         return -EIO;
 210         }
 211         if (debug)
 212                 printk(KERN_DEBUG "<%s", key);
 213
 214         outb(len, APPLESMC_DATA_PORT);
 215         if (debug)
 216                 printk(KERN_DEBUG ">%x", len);
 217
 218         for (i = 0; i < len; i++) {
 219                 if (__wait_status(0x05))
 220                         return -EIO;
 221                 buffer[i] = inb(APPLESMC_DATA_PORT);
 222                 if (debug)
 223                         printk(KERN_DEBUG "<%x", buffer[i]);
 224         }
 225         if (debug)
 226                 printk(KERN_DEBUG "\n");
 227
 228         return 0;
 229 }
 230
 231 /*
 232  * applesmc_write_key - writes len bytes from buffer to a given key.
 233  * Returns zero on success or a negative error on failure. Callers must
 234  * hold applesmc_lock.
 235  */
 236 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
 237 {
 238         int i;
 239
 240         if (len > APPLESMC_MAX_DATA_LENGTH) {
 241                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
 242                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 243                 return -EINVAL;
 244         }
 245
 246         outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT);
 247         if (__wait_status(0x0c))
 248                 return -EIO;
 249
 250         for (i = 0; i < 4; i++) {
 251                 outb(key[i], APPLESMC_DATA_PORT);
 252                 if (__wait_status(0x04))
 253                         return -EIO;
 254         }
 255
 256         outb(len, APPLESMC_DATA_PORT);
 257
 258         for (i = 0; i < len; i++) {
 259                 if (__wait_status(0x04))
 260                         return -EIO;
 261                 outb(buffer[i], APPLESMC_DATA_PORT);
 262         }
 263
 264         return 0;
 265 }
 266
 267 /*
 268  * applesmc_get_key_at_index - get key at index, and put the result in key
 269  * (char[6]). Returns zero on success or a negative error on failure. Callers
 270  * must hold applesmc_lock.
 271  */
 272 static int applesmc_get_key_at_index(int index, char* key)
 273 {
 274         int i;
 275         u8 readkey[4];
 276         readkey[0] = index >> 24;
 277         readkey[1] = index >> 16;
 278         readkey[2] = index >> 8;
 279         readkey[3] = index;
 280
 281         outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT);
 282         if (__wait_status(0x0c))
 283                 return -EIO;
 284
 285         for (i = 0; i < 4; i++) {
 286                 outb(readkey[i], APPLESMC_DATA_PORT);
 287                 if (__wait_status(0x04))
 288                         return -EIO;
 289         }
 290
 291         outb(4, APPLESMC_DATA_PORT);
 292
 293         for (i = 0; i < 4; i++) {
 294                 if (__wait_status(0x05))
 295                         return -EIO;
 296                 key[i] = inb(APPLESMC_DATA_PORT);
 297         }
 298         key[4] = 0;
 299
 300         return 0;
 301 }
 302
 303 /*
 304  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 305  * Returns zero on success or a negative error on failure. Callers must
 306  * hold applesmc_lock.
 307  */
 308 static int applesmc_get_key_type(char* key, char* type)
 309 {
 310         int i;
 311
 312         outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT);
 313         if (__wait_status(0x0c))
 314                 return -EIO;
 315
 316         for (i = 0; i < 4; i++) {
 317                 outb(key[i], APPLESMC_DATA_PORT);
 318                 if (__wait_status(0x04))
 319                         return -EIO;
 320         }
 321
 322         outb(5, APPLESMC_DATA_PORT);
 323
 324         for (i = 0; i < 6; i++) {
 325                 if (__wait_status(0x05))
 326                         return -EIO;
 327                 type[i] = inb(APPLESMC_DATA_PORT);
 328         }
 329         type[5] = 0;
 330
 331         return 0;
 332 }
 333
 334 /*
 335  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 336  * hold applesmc_lock.
 337  */
 338 static int applesmc_read_motion_sensor(int index, s16* value)
 339 {
 340         u8 buffer[2];
 341         int ret;
 342
 343         switch (index) {
 344         case SENSOR_X:
 345                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
 346                 break;
 347         case SENSOR_Y:
 348                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
 349                 break;
 350         case SENSOR_Z:
 351                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 352                 break;
 353         default:
 354                 ret = -EINVAL;
 355         }
 356
 357         *value = ((s16)buffer[0] << 8) | buffer[1];
 358
 359         return ret;
 360 }
 361
 362 /*
 363  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 364  * and negative error code on failure.  Can sleep.
 365  */
 366 static int applesmc_device_init(void)
 367 {
 368         int total, ret = -ENXIO;
 369         u8 buffer[2];
 370
 371         if (!applesmc_accelerometer)
 372                 return 0;
 373
 374         mutex_lock(&applesmc_lock);
 375
 376         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 377                 if (debug)
 378                         printk(KERN_DEBUG "applesmc try %d\n", total);
 379                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 380                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
 381                         if (total == INIT_TIMEOUT_MSECS) {
 382                                 printk(KERN_DEBUG "applesmc: device has"
 383                                                 " already been initialized"
 384                                                 " (0x%02x, 0x%02x).\n",
 385                                                 buffer[0], buffer[1]);
 386                         } else {
 387                                 printk(KERN_DEBUG "applesmc: device"
 388                                                 " successfully initialized"
 389                                                 " (0x%02x, 0x%02x).\n",
 390                                                 buffer[0], buffer[1]);
 391                         }
 392                         ret = 0;
 393                         goto out;
 394                 }
 395                 buffer[0] = 0xe0;
 396                 buffer[1] = 0x00;
 397                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 398                 msleep(INIT_WAIT_MSECS);
 399         }
 400
 401         printk(KERN_WARNING "applesmc: failed to init the device\n");
 402
 403 out:
 404         mutex_unlock(&applesmc_lock);
 405         return ret;
 406 }
 407
 408 /*
 409  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 410  * applesmc_lock.
 411  */
 412 static int applesmc_get_fan_count(void)
 413 {
 414         int ret;
 415         u8 buffer[1];
 416
 417         mutex_lock(&applesmc_lock);
 418
 419         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
 420
 421         mutex_unlock(&applesmc_lock);
 422         if (ret)
 423                 return ret;
 424         else
 425                 return buffer[0];
 426 }
 427
 428 /* Device model stuff */
 429 static int applesmc_probe(struct platform_device *dev)
 430 {
 431         int ret;
 432
 433         ret = applesmc_device_init();
 434         if (ret)
 435                 return ret;
 436
 437         printk(KERN_INFO "applesmc: device successfully initialized.\n");
 438         return 0;
 439 }
 440
 441 static int applesmc_resume(struct platform_device *dev)
 442 {
 443         return applesmc_device_init();
 444 }
 445
 446 static struct platform_driver applesmc_driver = {
 447         .probe = applesmc_probe,
 448         .resume = applesmc_resume,
 449         .driver = {
 450                 .name = "applesmc",
 451                 .owner = THIS_MODULE,
 452         },
 453 };
 454
 455 /*
 456  * applesmc_calibrate - Set our "resting" values.  Callers must
 457  * hold applesmc_lock.
 458  */
 459 static void applesmc_calibrate(void)
 460 {
 461         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
 462         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
 463         rest_x = -rest_x;
 464 }
 465
 466 static void applesmc_idev_poll(struct input_polled_dev *dev)
 467 {
 468         struct input_dev *idev = dev->input;
 469         s16 x, y;
 470
 471         mutex_lock(&applesmc_lock);
 472
 473         if (applesmc_read_motion_sensor(SENSOR_X, &x))
 474                 goto out;
 475         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
 476                 goto out;
 477
 478         x = -x;
 479         input_report_abs(idev, ABS_X, x - rest_x);
 480         input_report_abs(idev, ABS_Y, y - rest_y);
 481         input_sync(idev);
 482
 483 out:
 484         mutex_unlock(&applesmc_lock);
 485 }
 486
 487 /* Sysfs Files */
 488
 489 static ssize_t applesmc_name_show(struct device *dev,
 490                                    struct device_attribute *attr, char *buf)
 491 {
 492         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 493 }
 494
 495 static ssize_t applesmc_position_show(struct device *dev,
 496                                    struct device_attribute *attr, char *buf)
 497 {
 498         int ret;
 499         s16 x, y, z;
 500
 501         mutex_lock(&applesmc_lock);
 502
 503         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
 504         if (ret)
 505                 goto out;
 506         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
 507         if (ret)
 508                 goto out;
 509         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
 510         if (ret)
 511                 goto out;
 512
 513 out:
 514         mutex_unlock(&applesmc_lock);
 515         if (ret)
 516                 return ret;
 517         else
 518                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 519 }
 520
 521 static ssize_t applesmc_light_show(struct device *dev,
 522                                 struct device_attribute *attr, char *sysfsbuf)
 523 {
 524         int ret;
 525         u8 left = 0, right = 0;
 526         u8 buffer[6];
 527
 528         mutex_lock(&applesmc_lock);
 529
 530         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
 531         left = buffer[2];
 532         if (ret)
 533                 goto out;
 534         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
 535         right = buffer[2];
 536
 537 out:
 538         mutex_unlock(&applesmc_lock);
 539         if (ret)
 540                 return ret;
 541         else
 542                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 543 }
 544
 545 /* Displays degree Celsius * 1000 */
 546 static ssize_t applesmc_show_temperature(struct device *dev,
 547                         struct device_attribute *devattr, char *sysfsbuf)
 548 {
 549         int ret;
 550         u8 buffer[2];
 551         unsigned int temp;
 552         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 553         const char* key =
 554                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
 555
 556         mutex_lock(&applesmc_lock);
 557
 558         ret = applesmc_read_key(key, buffer, 2);
 559         temp = buffer[0]*1000;
 560         temp += (buffer[1] >> 6) * 250;
 561
 562         mutex_unlock(&applesmc_lock);
 563
 564         if (ret)
 565                 return ret;
 566         else
 567                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
 568 }
 569
 570 static ssize_t applesmc_show_fan_speed(struct device *dev,
 571                                 struct device_attribute *attr, char *sysfsbuf)
 572 {
 573         int ret;
 574         unsigned int speed = 0;
 575         char newkey[5];
 576         u8 buffer[2];
 577         struct sensor_device_attribute_2 *sensor_attr =
 578                                                 to_sensor_dev_attr_2(attr);
 579
 580         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 581         newkey[1] = '0' + sensor_attr->index;
 582         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 583         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 584         newkey[4] = 0;
 585
 586         mutex_lock(&applesmc_lock);
 587
 588         ret = applesmc_read_key(newkey, buffer, 2);
 589         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 590
 591         mutex_unlock(&applesmc_lock);
 592         if (ret)
 593                 return ret;
 594         else
 595                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 596 }
 597
 598 static ssize_t applesmc_store_fan_speed(struct device *dev,
 599                                         struct device_attribute *attr,
 600                                         const char *sysfsbuf, size_t count)
 601 {
 602         int ret;
 603         u32 speed;
 604         char newkey[5];
 605         u8 buffer[2];
 606         struct sensor_device_attribute_2 *sensor_attr =
 607                                                 to_sensor_dev_attr_2(attr);
 608
 609         speed = simple_strtoul(sysfsbuf, NULL, 10);
 610
 611         if (speed > 0x4000) /* Bigger than a 14-bit value */
 612                 return -EINVAL;
 613
 614         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 615         newkey[1] = '0' + sensor_attr->index;
 616         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 617         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 618         newkey[4] = 0;
 619
 620         mutex_lock(&applesmc_lock);
 621
 622         buffer[0] = (speed >> 6) & 0xff;
 623         buffer[1] = (speed << 2) & 0xff;
 624         ret = applesmc_write_key(newkey, buffer, 2);
 625
 626         mutex_unlock(&applesmc_lock);
 627         if (ret)
 628                 return ret;
 629         else
 630                 return count;
 631 }
 632
 633 static ssize_t applesmc_show_fan_manual(struct device *dev,
 634                         struct device_attribute *devattr, char *sysfsbuf)
 635 {
 636         int ret;
 637         u16 manual = 0;
 638         u8 buffer[2];
 639         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 640
 641         mutex_lock(&applesmc_lock);
 642
 643         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 644         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
 645
 646         mutex_unlock(&applesmc_lock);
 647         if (ret)
 648                 return ret;
 649         else
 650                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 651 }
 652
 653 static ssize_t applesmc_store_fan_manual(struct device *dev,
 654                                          struct device_attribute *devattr,
 655                                          const char *sysfsbuf, size_t count)
 656 {
 657         int ret;
 658         u8 buffer[2];
 659         u32 input;
 660         u16 val;
 661         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 662
 663         input = simple_strtoul(sysfsbuf, NULL, 10);
 664
 665         mutex_lock(&applesmc_lock);
 666
 667         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 668         val = (buffer[0] << 8 | buffer[1]);
 669         if (ret)
 670                 goto out;
 671
 672         if (input)
 673                 val = val | (0x01 << attr->index);
 674         else
 675                 val = val & ~(0x01 << attr->index);
 676
 677         buffer[0] = (val >> 8) & 0xFF;
 678         buffer[1] = val & 0xFF;
 679
 680         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 681
 682 out:
 683         mutex_unlock(&applesmc_lock);
 684         if (ret)
 685                 return ret;
 686         else
 687                 return count;
 688 }
 689
 690 static ssize_t applesmc_show_fan_position(struct device *dev,
 691                                 struct device_attribute *attr, char *sysfsbuf)
 692 {
 693         int ret;
 694         char newkey[5];
 695         u8 buffer[17];
 696         struct sensor_device_attribute_2 *sensor_attr =
 697                                                 to_sensor_dev_attr_2(attr);
 698
 699         newkey[0] = FAN_POSITION[0];
 700         newkey[1] = '0' + sensor_attr->index;
 701         newkey[2] = FAN_POSITION[2];
 702         newkey[3] = FAN_POSITION[3];
 703         newkey[4] = 0;
 704
 705         mutex_lock(&applesmc_lock);
 706
 707         ret = applesmc_read_key(newkey, buffer, 16);
 708         buffer[16] = 0;
 709
 710         mutex_unlock(&applesmc_lock);
 711         if (ret)
 712                 return ret;
 713         else
 714                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 715 }
 716
 717 static ssize_t applesmc_calibrate_show(struct device *dev,
 718                                 struct device_attribute *attr, char *sysfsbuf)
 719 {
 720         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 721 }
 722
 723 static ssize_t applesmc_calibrate_store(struct device *dev,
 724         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 725 {
 726         mutex_lock(&applesmc_lock);
 727         applesmc_calibrate();
 728         mutex_unlock(&applesmc_lock);
 729
 730         return count;
 731 }
 732
 733 /* Store the next backlight value to be written by the work */
 734 static unsigned int backlight_value;
 735
 736 static void applesmc_backlight_set(struct work_struct *work)
 737 {
 738         u8 buffer[2];
 739
 740         mutex_lock(&applesmc_lock);
 741         buffer[0] = backlight_value;
 742         buffer[1] = 0x00;
 743         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
 744         mutex_unlock(&applesmc_lock);
 745 }
 746 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 747
 748 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 749                                                 enum led_brightness value)
 750 {
 751         int ret;
 752
 753         backlight_value = value;
 754         ret = queue_work(applesmc_led_wq, &backlight_work);
 755
 756         if (debug && (!ret))
 757                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
 758 }
 759
 760 static ssize_t applesmc_key_count_show(struct device *dev,
 761                                 struct device_attribute *attr, char *sysfsbuf)
 762 {
 763         int ret;
 764         u8 buffer[4];
 765         u32 count;
 766
 767         mutex_lock(&applesmc_lock);
 768
 769         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 770         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 771                                                 ((u32)buffer[2]<<8) + buffer[3];
 772
 773         mutex_unlock(&applesmc_lock);
 774         if (ret)
 775                 return ret;
 776         else
 777                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 778 }
 779
 780 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 781                                 struct device_attribute *attr, char *sysfsbuf)
 782 {
 783         char key[5];
 784         char info[6];
 785         int ret;
 786
 787         mutex_lock(&applesmc_lock);
 788
 789         ret = applesmc_get_key_at_index(key_at_index, key);
 790
 791         if (ret || !key[0]) {
 792                 mutex_unlock(&applesmc_lock);
 793
 794                 return -EINVAL;
 795         }
 796
 797         ret = applesmc_get_key_type(key, info);
 798
 799         if (ret) {
 800                 mutex_unlock(&applesmc_lock);
 801
 802                 return ret;
 803         }
 804
 805         /*
 806          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
 807          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
 808          */
 809         ret = applesmc_read_key(key, sysfsbuf, info[0]);
 810
 811         mutex_unlock(&applesmc_lock);
 812
 813         if (!ret) {
 814                 return info[0];
 815         } else {
 816                 return ret;
 817         }
 818 }
 819
 820 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 821                                 struct device_attribute *attr, char *sysfsbuf)
 822 {
 823         char key[5];
 824         char info[6];
 825         int ret;
 826
 827         mutex_lock(&applesmc_lock);
 828
 829         ret = applesmc_get_key_at_index(key_at_index, key);
 830
 831         if (ret || !key[0]) {
 832                 mutex_unlock(&applesmc_lock);
 833
 834                 return -EINVAL;
 835         }
 836
 837         ret = applesmc_get_key_type(key, info);
 838
 839         mutex_unlock(&applesmc_lock);
 840
 841         if (!ret)
 842                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
 843         else
 844                 return ret;
 845 }
 846
 847 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 848                                 struct device_attribute *attr, char *sysfsbuf)
 849 {
 850         char key[5];
 851         char info[6];
 852         int ret;
 853
 854         mutex_lock(&applesmc_lock);
 855
 856         ret = applesmc_get_key_at_index(key_at_index, key);
 857
 858         if (ret || !key[0]) {
 859                 mutex_unlock(&applesmc_lock);
 860
 861                 return -EINVAL;
 862         }
 863
 864         ret = applesmc_get_key_type(key, info);
 865
 866         mutex_unlock(&applesmc_lock);
 867
 868         if (!ret)
 869                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
 870         else
 871                 return ret;
 872 }
 873
 874 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 875                                 struct device_attribute *attr, char *sysfsbuf)
 876 {
 877         char key[5];
 878         int ret;
 879
 880         mutex_lock(&applesmc_lock);
 881
 882         ret = applesmc_get_key_at_index(key_at_index, key);
 883
 884         mutex_unlock(&applesmc_lock);
 885
 886         if (!ret && key[0])
 887                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 888         else
 889                 return -EINVAL;
 890 }
 891
 892 static ssize_t applesmc_key_at_index_show(struct device *dev,
 893                                 struct device_attribute *attr, char *sysfsbuf)
 894 {
 895         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
 896 }
 897
 898 static ssize_t applesmc_key_at_index_store(struct device *dev,
 899         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 900 {
 901         mutex_lock(&applesmc_lock);
 902
 903         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
 904
 905         mutex_unlock(&applesmc_lock);
 906
 907         return count;
 908 }
 909
 910 static struct led_classdev applesmc_backlight = {
 911         .name                   = "smc::kbd_backlight",
 912         .default_trigger        = "nand-disk",
 913         .brightness_set         = applesmc_brightness_set,
 914 };
 915
 916 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
 917
 918 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
 919 static DEVICE_ATTR(calibrate, 0644,
 920                         applesmc_calibrate_show, applesmc_calibrate_store);
 921
 922 static struct attribute *accelerometer_attributes[] = {
 923         &dev_attr_position.attr,
 924         &dev_attr_calibrate.attr,
 925         NULL
 926 };
 927
 928 static const struct attribute_group accelerometer_attributes_group =
 929         { .attrs = accelerometer_attributes };
 930
 931 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
 932
 933 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
 934 static DEVICE_ATTR(key_at_index, 0644,
 935                 applesmc_key_at_index_show, applesmc_key_at_index_store);
 936 static DEVICE_ATTR(key_at_index_name, 0444,
 937                                         applesmc_key_at_index_name_show, NULL);
 938 static DEVICE_ATTR(key_at_index_type, 0444,
 939                                         applesmc_key_at_index_type_show, NULL);
 940 static DEVICE_ATTR(key_at_index_data_length, 0444,
 941                                 applesmc_key_at_index_data_length_show, NULL);
 942 static DEVICE_ATTR(key_at_index_data, 0444,
 943                                 applesmc_key_at_index_read_show, NULL);
 944
 945 static struct attribute *key_enumeration_attributes[] = {
 946         &dev_attr_key_count.attr,
 947         &dev_attr_key_at_index.attr,
 948         &dev_attr_key_at_index_name.attr,
 949         &dev_attr_key_at_index_type.attr,
 950         &dev_attr_key_at_index_data_length.attr,
 951         &dev_attr_key_at_index_data.attr,
 952         NULL
 953 };
 954
 955 static const struct attribute_group key_enumeration_group =
 956         { .attrs = key_enumeration_attributes };
 957
 958 /*
 959  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
 960  *  - show actual speed
 961  *  - show/store minimum speed
 962  *  - show maximum speed
 963  *  - show safe speed
 964  *  - show/store target speed
 965  *  - show/store manual mode
 966  */
 967 #define sysfs_fan_speeds_offset(offset) \
 968 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
 969                         applesmc_show_fan_speed, NULL, 0, offset-1); \
 970 \
 971 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
 972         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
 973 \
 974 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
 975                         applesmc_show_fan_speed, NULL, 2, offset-1); \
 976 \
 977 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
 978                         applesmc_show_fan_speed, NULL, 3, offset-1); \
 979 \
 980 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
 981         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
 982 \
 983 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
 984         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
 985 \
 986 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
 987         applesmc_show_fan_position, NULL, offset-1); \
 988 \
 989 static struct attribute *fan##offset##_attributes[] = { \
 990         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
 991         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
 992         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
 993         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
 994         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
 995         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
 996         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
 997         NULL \
 998 };
 999
1000 /*
1001  * Create the needed functions for each fan using the macro defined above
1002  * (4 fans are supported)
1003  */
1004 sysfs_fan_speeds_offset(1);
1005 sysfs_fan_speeds_offset(2);
1006 sysfs_fan_speeds_offset(3);
1007 sysfs_fan_speeds_offset(4);
1008
1009 static const struct attribute_group fan_attribute_groups[] = {
1010         { .attrs = fan1_attributes },
1011         { .attrs = fan2_attributes },
1012         { .attrs = fan3_attributes },
1013         { .attrs = fan4_attributes },
1014 };
1015
1016 /*
1017  * Temperature sensors sysfs entries.
1018  */
1019 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1020                                         applesmc_show_temperature, NULL, 0);
1021 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1022                                         applesmc_show_temperature, NULL, 1);
1023 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1024                                         applesmc_show_temperature, NULL, 2);
1025 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1026                                         applesmc_show_temperature, NULL, 3);
1027 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1028                                         applesmc_show_temperature, NULL, 4);
1029 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1030                                         applesmc_show_temperature, NULL, 5);
1031 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1032                                         applesmc_show_temperature, NULL, 6);
1033 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1034                                         applesmc_show_temperature, NULL, 7);
1035 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1036                                         applesmc_show_temperature, NULL, 8);
1037 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1038                                         applesmc_show_temperature, NULL, 9);
1039 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1040                                         applesmc_show_temperature, NULL, 10);
1041 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1042                                         applesmc_show_temperature, NULL, 11);
1043 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1044                                         applesmc_show_temperature, NULL, 12);
1045 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1046                                         applesmc_show_temperature, NULL, 13);
1047 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1048                                         applesmc_show_temperature, NULL, 14);
1049 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1050                                         applesmc_show_temperature, NULL, 15);
1051 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1052                                         applesmc_show_temperature, NULL, 16);
1053 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1054                                         applesmc_show_temperature, NULL, 17);
1055 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1056                                         applesmc_show_temperature, NULL, 18);
1057 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1058                                         applesmc_show_temperature, NULL, 19);
1059 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1060                                         applesmc_show_temperature, NULL, 20);
1061 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1062                                         applesmc_show_temperature, NULL, 21);
1063 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1064                                         applesmc_show_temperature, NULL, 22);
1065 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1066                                         applesmc_show_temperature, NULL, 23);
1067 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1068                                         applesmc_show_temperature, NULL, 24);
1069 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1070                                         applesmc_show_temperature, NULL, 25);
1071 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1072                                         applesmc_show_temperature, NULL, 26);
1073 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1074                                         applesmc_show_temperature, NULL, 27);
1075 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1076                                         applesmc_show_temperature, NULL, 28);
1077 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1078                                         applesmc_show_temperature, NULL, 29);
1079 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1080                                         applesmc_show_temperature, NULL, 30);
1081 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1082                                         applesmc_show_temperature, NULL, 31);
1083 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1084                                         applesmc_show_temperature, NULL, 32);
1085 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1086                                         applesmc_show_temperature, NULL, 33);
1087 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1088                                         applesmc_show_temperature, NULL, 34);
1089
1090 static struct attribute *temperature_attributes[] = {
1091         &sensor_dev_attr_temp1_input.dev_attr.attr,
1092         &sensor_dev_attr_temp2_input.dev_attr.attr,
1093         &sensor_dev_attr_temp3_input.dev_attr.attr,
1094         &sensor_dev_attr_temp4_input.dev_attr.attr,
1095         &sensor_dev_attr_temp5_input.dev_attr.attr,
1096         &sensor_dev_attr_temp6_input.dev_attr.attr,
1097         &sensor_dev_attr_temp7_input.dev_attr.attr,
1098         &sensor_dev_attr_temp8_input.dev_attr.attr,
1099         &sensor_dev_attr_temp9_input.dev_attr.attr,
1100         &sensor_dev_attr_temp10_input.dev_attr.attr,
1101         &sensor_dev_attr_temp11_input.dev_attr.attr,
1102         &sensor_dev_attr_temp12_input.dev_attr.attr,
1103         &sensor_dev_attr_temp13_input.dev_attr.attr,
1104         &sensor_dev_attr_temp14_input.dev_attr.attr,
1105         &sensor_dev_attr_temp15_input.dev_attr.attr,
1106         &sensor_dev_attr_temp16_input.dev_attr.attr,
1107         &sensor_dev_attr_temp17_input.dev_attr.attr,
1108         &sensor_dev_attr_temp18_input.dev_attr.attr,
1109         &sensor_dev_attr_temp19_input.dev_attr.attr,
1110         &sensor_dev_attr_temp20_input.dev_attr.attr,
1111         &sensor_dev_attr_temp21_input.dev_attr.attr,
1112         &sensor_dev_attr_temp22_input.dev_attr.attr,
1113         &sensor_dev_attr_temp23_input.dev_attr.attr,
1114         &sensor_dev_attr_temp24_input.dev_attr.attr,
1115         &sensor_dev_attr_temp25_input.dev_attr.attr,
1116         &sensor_dev_attr_temp26_input.dev_attr.attr,
1117         &sensor_dev_attr_temp27_input.dev_attr.attr,
1118         &sensor_dev_attr_temp28_input.dev_attr.attr,
1119         &sensor_dev_attr_temp29_input.dev_attr.attr,
1120         &sensor_dev_attr_temp30_input.dev_attr.attr,
1121         &sensor_dev_attr_temp31_input.dev_attr.attr,
1122         &sensor_dev_attr_temp32_input.dev_attr.attr,
1123         &sensor_dev_attr_temp33_input.dev_attr.attr,
1124         &sensor_dev_attr_temp34_input.dev_attr.attr,
1125         &sensor_dev_attr_temp35_input.dev_attr.attr,
1126         NULL
1127 };
1128
1129 static const struct attribute_group temperature_attributes_group =
1130         { .attrs = temperature_attributes };
1131
1132 /* Module stuff */
1133
1134 /*
1135  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1136  */
1137 static int applesmc_dmi_match(const struct dmi_system_id *id)
1138 {
1139         int i = 0;
1140         struct dmi_match_data* dmi_data = id->driver_data;
1141         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1142         applesmc_accelerometer = dmi_data->accelerometer;
1143         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1144                                 applesmc_accelerometer ? "with" : "without");
1145         applesmc_light = dmi_data->light;
1146         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1147                                         applesmc_light ? "with" : "without");
1148
1149         applesmc_temperature_set =  dmi_data->temperature_set;
1150         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1151                 i++;
1152         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1153         return 1;
1154 }
1155
1156 /* Create accelerometer ressources */
1157 static int applesmc_create_accelerometer(void)
1158 {
1159         struct input_dev *idev;
1160         int ret;
1161
1162         ret = sysfs_create_group(&pdev->dev.kobj,
1163                                         &accelerometer_attributes_group);
1164         if (ret)
1165                 goto out;
1166
1167         applesmc_idev = input_allocate_polled_device();
1168         if (!applesmc_idev) {
1169                 ret = -ENOMEM;
1170                 goto out_sysfs;
1171         }
1172
1173         applesmc_idev->poll = applesmc_idev_poll;
1174         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1175
1176         /* initial calibrate for the input device */
1177         applesmc_calibrate();
1178
1179         /* initialize the input device */
1180         idev = applesmc_idev->input;
1181         idev->name = "applesmc";
1182         idev->id.bustype = BUS_HOST;
1183         idev->dev.parent = &pdev->dev;
1184         idev->evbit[0] = BIT_MASK(EV_ABS);
1185         input_set_abs_params(idev, ABS_X,
1186                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1187         input_set_abs_params(idev, ABS_Y,
1188                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1189
1190         ret = input_register_polled_device(applesmc_idev);
1191         if (ret)
1192                 goto out_idev;
1193
1194         return 0;
1195
1196 out_idev:
1197         input_free_polled_device(applesmc_idev);
1198
1199 out_sysfs:
1200         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1201
1202 out:
1203         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1204         return ret;
1205 }
1206
1207 /* Release all ressources used by the accelerometer */
1208 static void applesmc_release_accelerometer(void)
1209 {
1210         input_unregister_polled_device(applesmc_idev);
1211         input_free_polled_device(applesmc_idev);
1212         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1213 }
1214
1215 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1216 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1217         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1218 /* MacBook2: accelerometer and temperature set 1 */
1219         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1220 /* MacBook: accelerometer and temperature set 2 */
1221         { .accelerometer = 1, .light = 0, .temperature_set = 2 },
1222 /* MacMini: temperature set 3 */
1223         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1224 /* MacPro: temperature set 4 */
1225         { .accelerometer = 0, .light = 0, .temperature_set = 4 },
1226 };
1227
1228 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1229  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1230 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1231         { applesmc_dmi_match, "Apple MacBook Pro", {
1232           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1233           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1234                 (void*)&applesmc_dmi_data[0]},
1235         { applesmc_dmi_match, "Apple MacBook", {
1236           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1237           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook2") },
1238                 (void*)&applesmc_dmi_data[1]},
1239         { applesmc_dmi_match, "Apple MacBook", {
1240           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1241           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1242                 (void*)&applesmc_dmi_data[2]},
1243         { applesmc_dmi_match, "Apple Macmini", {
1244           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1245           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1246                 (void*)&applesmc_dmi_data[3]},
1247         { applesmc_dmi_match, "Apple MacPro2", {
1248           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1249           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1250                 (void*)&applesmc_dmi_data[4]},
1251         { .ident = NULL }
1252 };
1253
1254 static int __init applesmc_init(void)
1255 {
1256         int ret;
1257         int count;
1258         int i;
1259
1260         if (!dmi_check_system(applesmc_whitelist)) {
1261                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1262                 ret = -ENODEV;
1263                 goto out;
1264         }
1265
1266         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1267                                                                 "applesmc")) {
1268                 ret = -ENXIO;
1269                 goto out;
1270         }
1271
1272         ret = platform_driver_register(&applesmc_driver);
1273         if (ret)
1274                 goto out_region;
1275
1276         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1277                                                NULL, 0);
1278         if (IS_ERR(pdev)) {
1279                 ret = PTR_ERR(pdev);
1280                 goto out_driver;
1281         }
1282
1283         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1284         if (ret)
1285                 goto out_device;
1286
1287         /* Create key enumeration sysfs files */
1288         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1289         if (ret)
1290                 goto out_name;
1291
1292         /* create fan files */
1293         count = applesmc_get_fan_count();
1294         if (count < 0) {
1295                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1296         } else {
1297                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1298
1299                 switch (count) {
1300                 default:
1301                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1302                                         " but at most 4 fans are supported"
1303                                                 " by the driver.\n");
1304                 case 4:
1305                         ret = sysfs_create_group(&pdev->dev.kobj,
1306                                                  &fan_attribute_groups[3]);
1307                         if (ret)
1308                                 goto out_key_enumeration;
1309                 case 3:
1310                         ret = sysfs_create_group(&pdev->dev.kobj,
1311                                                  &fan_attribute_groups[2]);
1312                         if (ret)
1313                                 goto out_key_enumeration;
1314                 case 2:
1315                         ret = sysfs_create_group(&pdev->dev.kobj,
1316                                                  &fan_attribute_groups[1]);
1317                         if (ret)
1318                                 goto out_key_enumeration;
1319                 case 1:
1320                         ret = sysfs_create_group(&pdev->dev.kobj,
1321                                                  &fan_attribute_groups[0]);
1322                         if (ret)
1323                                 goto out_fan_1;
1324                 case 0:
1325                         ;
1326                 }
1327         }
1328
1329         for (i = 0;
1330              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1331              i++) {
1332                 if (temperature_attributes[i] == NULL) {
1333                         printk(KERN_ERR "applesmc: More temperature sensors "
1334                                 "in temperature_sensors_sets (at least %i)"
1335                                 "than available sysfs files in "
1336                                 "temperature_attributes (%i), please report "
1337                                 "this bug.\n", i, i-1);
1338                         goto out_temperature;
1339                 }
1340                 ret = sysfs_create_file(&pdev->dev.kobj,
1341                                                 temperature_attributes[i]);
1342                 if (ret)
1343                         goto out_temperature;
1344         }
1345
1346         if (applesmc_accelerometer) {
1347                 ret = applesmc_create_accelerometer();
1348                 if (ret)
1349                         goto out_temperature;
1350         }
1351
1352         if (applesmc_light) {
1353                 /* Add light sensor file */
1354                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1355                 if (ret)
1356                         goto out_accelerometer;
1357
1358                 /* Create the workqueue */
1359                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1360                 if (!applesmc_led_wq) {
1361                         ret = -ENOMEM;
1362                         goto out_light_sysfs;
1363                 }
1364
1365                 /* register as a led device */
1366                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1367                 if (ret < 0)
1368                         goto out_light_wq;
1369         }
1370
1371         hwmon_dev = hwmon_device_register(&pdev->dev);
1372         if (IS_ERR(hwmon_dev)) {
1373                 ret = PTR_ERR(hwmon_dev);
1374                 goto out_light_ledclass;
1375         }
1376
1377         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1378
1379         return 0;
1380
1381 out_light_ledclass:
1382         if (applesmc_light)
1383                 led_classdev_unregister(&applesmc_backlight);
1384 out_light_wq:
1385         if (applesmc_light)
1386                 destroy_workqueue(applesmc_led_wq);
1387 out_light_sysfs:
1388         if (applesmc_light)
1389                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1390 out_accelerometer:
1391         if (applesmc_accelerometer)
1392                 applesmc_release_accelerometer();
1393 out_temperature:
1394         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1395         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1396 out_fan_1:
1397         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1398 out_key_enumeration:
1399         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1400 out_name:
1401         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1402 out_device:
1403         platform_device_unregister(pdev);
1404 out_driver:
1405         platform_driver_unregister(&applesmc_driver);
1406 out_region:
1407         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1408 out:
1409         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1410         return ret;
1411 }
1412
1413 static void __exit applesmc_exit(void)
1414 {
1415         hwmon_device_unregister(hwmon_dev);
1416         if (applesmc_light) {
1417                 led_classdev_unregister(&applesmc_backlight);
1418                 destroy_workqueue(applesmc_led_wq);
1419                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1420         }
1421         if (applesmc_accelerometer)
1422                 applesmc_release_accelerometer();
1423         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1424         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1425         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1426         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1427         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1428         platform_device_unregister(pdev);
1429         platform_driver_unregister(&applesmc_driver);
1430         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1431
1432         printk(KERN_INFO "applesmc: driver unloaded.\n");
1433 }
1434
1435 module_init(applesmc_init);
1436 module_exit(applesmc_exit);
1437
1438 MODULE_AUTHOR("Nicolas Boichat");
1439 MODULE_DESCRIPTION("Apple SMC");
1440 MODULE_LICENSE("GPL v2");