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 (6-10 bytes) */
  61 #define LIGHT_SENSOR_RIGHT_KEY  "ALV1" /* r-o {alv (6-10 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 /* Set 5: iMac */
 102         { "TC0D", "TA0P", "TG0P", "TG0D", "TG0H", "TH0P", "Tm0P", "TO0P",
 103           "Tp0C", NULL },
 104 /* Set 6: Macbook3 set */
 105         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TTF0", "TW0P", "Th0H",
 106           "Th0S", "Th1H", NULL },
 107 /* Set 7: Macbook Air */
 108         { "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TC0P", "TCFP",
 109           "TTF0", "TW0P", "Th0H", "Tp0P", "TpFP", "Ts0P", "Ts0S", NULL },
 110 };
 111
 112 /* List of keys used to read/write fan speeds */
 113 static const char* fan_speed_keys[] = {
 114         FAN_ACTUAL_SPEED,
 115         FAN_MIN_SPEED,
 116         FAN_MAX_SPEED,
 117         FAN_SAFE_SPEED,
 118         FAN_TARGET_SPEED
 119 };
 120
 121 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
 122 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
 123
 124 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
 125 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 126 #define APPLESMC_INPUT_FLAT     4
 127
 128 #define SENSOR_X 0
 129 #define SENSOR_Y 1
 130 #define SENSOR_Z 2
 131
 132 /* Structure to be passed to DMI_MATCH function */
 133 struct dmi_match_data {
 134 /* Indicates whether this computer has an accelerometer. */
 135         int accelerometer;
 136 /* Indicates whether this computer has light sensors and keyboard backlight. */
 137         int light;
 138 /* Indicates which temperature sensors set to use. */
 139         int temperature_set;
 140 };
 141
 142 static const int debug;
 143 static struct platform_device *pdev;
 144 static s16 rest_x;
 145 static s16 rest_y;
 146 static struct device *hwmon_dev;
 147 static struct input_polled_dev *applesmc_idev;
 148
 149 /* Indicates whether this computer has an accelerometer. */
 150 static unsigned int applesmc_accelerometer;
 151
 152 /* Indicates whether this computer has light sensors and keyboard backlight. */
 153 static unsigned int applesmc_light;
 154
 155 /* Indicates which temperature sensors set to use. */
 156 static unsigned int applesmc_temperature_set;
 157
 158 static DEFINE_MUTEX(applesmc_lock);
 159
 160 /*
 161  * Last index written to key_at_index sysfs file, and value to use for all other
 162  * key_at_index_* sysfs files.
 163  */
 164 static unsigned int key_at_index;
 165
 166 static struct workqueue_struct *applesmc_led_wq;
 167
 168 /*
 169  * __wait_status - Wait up to 10ms for the status port to get a certain value
 170  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 171  * hold applesmc_lock.
 172  */
 173 static int __wait_status(u8 val)
 174 {
 175         unsigned int i;
 176
 177         val = val & APPLESMC_STATUS_MASK;
 178
 179         for (i = 0; i < 1000; i++) {
 180                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
 181                         if (debug)
 182                                 printk(KERN_DEBUG
 183                                                 "Waited %d us for status %x\n",
 184                                                 i*10, val);
 185                         return 0;
 186                 }
 187                 udelay(10);
 188         }
 189
 190         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
 191                                                 val, inb(APPLESMC_CMD_PORT));
 192
 193         return -EIO;
 194 }
 195
 196 /*
 197  * special treatment of command port - on newer macbooks, it seems necessary
 198  * to resend the command byte before polling the status again. Callers must
 199  * hold applesmc_lock.
 200  */
 201 static int send_command(u8 cmd)
 202 {
 203         int i;
 204         for (i = 0; i < 1000; i++) {
 205                 outb(cmd, APPLESMC_CMD_PORT);
 206                 udelay(5);
 207                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c)
 208                         return 0;
 209                 udelay(5);
 210         }
 211         printk(KERN_WARNING "applesmc: command failed: %x -> %x\n",
 212                 cmd, inb(APPLESMC_CMD_PORT));
 213         return -EIO;
 214 }
 215
 216 /*
 217  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 218  * Returns zero on success or a negative error on failure. Callers must
 219  * hold applesmc_lock.
 220  */
 221 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
 222 {
 223         int i;
 224
 225         if (len > APPLESMC_MAX_DATA_LENGTH) {
 226                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
 227                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 228                 return -EINVAL;
 229         }
 230
 231         if (send_command(APPLESMC_READ_CMD))
 232                 return -EIO;
 233
 234         for (i = 0; i < 4; i++) {
 235                 outb(key[i], APPLESMC_DATA_PORT);
 236                 if (__wait_status(0x04))
 237                         return -EIO;
 238         }
 239         if (debug)
 240                 printk(KERN_DEBUG "<%s", key);
 241
 242         outb(len, APPLESMC_DATA_PORT);
 243         if (debug)
 244                 printk(KERN_DEBUG ">%x", len);
 245
 246         for (i = 0; i < len; i++) {
 247                 if (__wait_status(0x05))
 248                         return -EIO;
 249                 buffer[i] = inb(APPLESMC_DATA_PORT);
 250                 if (debug)
 251                         printk(KERN_DEBUG "<%x", buffer[i]);
 252         }
 253         if (debug)
 254                 printk(KERN_DEBUG "\n");
 255
 256         return 0;
 257 }
 258
 259 /*
 260  * applesmc_write_key - writes len bytes from buffer to a given key.
 261  * Returns zero on success or a negative error on failure. Callers must
 262  * hold applesmc_lock.
 263  */
 264 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
 265 {
 266         int i;
 267
 268         if (len > APPLESMC_MAX_DATA_LENGTH) {
 269                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
 270                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 271                 return -EINVAL;
 272         }
 273
 274         if (send_command(APPLESMC_WRITE_CMD))
 275                 return -EIO;
 276
 277         for (i = 0; i < 4; i++) {
 278                 outb(key[i], APPLESMC_DATA_PORT);
 279                 if (__wait_status(0x04))
 280                         return -EIO;
 281         }
 282
 283         outb(len, APPLESMC_DATA_PORT);
 284
 285         for (i = 0; i < len; i++) {
 286                 if (__wait_status(0x04))
 287                         return -EIO;
 288                 outb(buffer[i], APPLESMC_DATA_PORT);
 289         }
 290
 291         return 0;
 292 }
 293
 294 /*
 295  * applesmc_get_key_at_index - get key at index, and put the result in key
 296  * (char[6]). Returns zero on success or a negative error on failure. Callers
 297  * must hold applesmc_lock.
 298  */
 299 static int applesmc_get_key_at_index(int index, char* key)
 300 {
 301         int i;
 302         u8 readkey[4];
 303         readkey[0] = index >> 24;
 304         readkey[1] = index >> 16;
 305         readkey[2] = index >> 8;
 306         readkey[3] = index;
 307
 308         if (send_command(APPLESMC_GET_KEY_BY_INDEX_CMD))
 309                 return -EIO;
 310
 311         for (i = 0; i < 4; i++) {
 312                 outb(readkey[i], APPLESMC_DATA_PORT);
 313                 if (__wait_status(0x04))
 314                         return -EIO;
 315         }
 316
 317         outb(4, APPLESMC_DATA_PORT);
 318
 319         for (i = 0; i < 4; i++) {
 320                 if (__wait_status(0x05))
 321                         return -EIO;
 322                 key[i] = inb(APPLESMC_DATA_PORT);
 323         }
 324         key[4] = 0;
 325
 326         return 0;
 327 }
 328
 329 /*
 330  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 331  * Returns zero on success or a negative error on failure. Callers must
 332  * hold applesmc_lock.
 333  */
 334 static int applesmc_get_key_type(char* key, char* type)
 335 {
 336         int i;
 337
 338         if (send_command(APPLESMC_GET_KEY_TYPE_CMD))
 339                 return -EIO;
 340
 341         for (i = 0; i < 4; i++) {
 342                 outb(key[i], APPLESMC_DATA_PORT);
 343                 if (__wait_status(0x04))
 344                         return -EIO;
 345         }
 346
 347         outb(6, APPLESMC_DATA_PORT);
 348
 349         for (i = 0; i < 6; i++) {
 350                 if (__wait_status(0x05))
 351                         return -EIO;
 352                 type[i] = inb(APPLESMC_DATA_PORT);
 353         }
 354         type[5] = 0;
 355
 356         return 0;
 357 }
 358
 359 /*
 360  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 361  * hold applesmc_lock.
 362  */
 363 static int applesmc_read_motion_sensor(int index, s16* value)
 364 {
 365         u8 buffer[2];
 366         int ret;
 367
 368         switch (index) {
 369         case SENSOR_X:
 370                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
 371                 break;
 372         case SENSOR_Y:
 373                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
 374                 break;
 375         case SENSOR_Z:
 376                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 377                 break;
 378         default:
 379                 ret = -EINVAL;
 380         }
 381
 382         *value = ((s16)buffer[0] << 8) | buffer[1];
 383
 384         return ret;
 385 }
 386
 387 /*
 388  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 389  * and negative error code on failure.  Can sleep.
 390  */
 391 static int applesmc_device_init(void)
 392 {
 393         int total, ret = -ENXIO;
 394         u8 buffer[2];
 395
 396         if (!applesmc_accelerometer)
 397                 return 0;
 398
 399         mutex_lock(&applesmc_lock);
 400
 401         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 402                 if (debug)
 403                         printk(KERN_DEBUG "applesmc try %d\n", total);
 404                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 405                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
 406                         if (total == INIT_TIMEOUT_MSECS) {
 407                                 printk(KERN_DEBUG "applesmc: device has"
 408                                                 " already been initialized"
 409                                                 " (0x%02x, 0x%02x).\n",
 410                                                 buffer[0], buffer[1]);
 411                         } else {
 412                                 printk(KERN_DEBUG "applesmc: device"
 413                                                 " successfully initialized"
 414                                                 " (0x%02x, 0x%02x).\n",
 415                                                 buffer[0], buffer[1]);
 416                         }
 417                         ret = 0;
 418                         goto out;
 419                 }
 420                 buffer[0] = 0xe0;
 421                 buffer[1] = 0x00;
 422                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 423                 msleep(INIT_WAIT_MSECS);
 424         }
 425
 426         printk(KERN_WARNING "applesmc: failed to init the device\n");
 427
 428 out:
 429         mutex_unlock(&applesmc_lock);
 430         return ret;
 431 }
 432
 433 /*
 434  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 435  * applesmc_lock.
 436  */
 437 static int applesmc_get_fan_count(void)
 438 {
 439         int ret;
 440         u8 buffer[1];
 441
 442         mutex_lock(&applesmc_lock);
 443
 444         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
 445
 446         mutex_unlock(&applesmc_lock);
 447         if (ret)
 448                 return ret;
 449         else
 450                 return buffer[0];
 451 }
 452
 453 /* Device model stuff */
 454 static int applesmc_probe(struct platform_device *dev)
 455 {
 456         int ret;
 457
 458         ret = applesmc_device_init();
 459         if (ret)
 460                 return ret;
 461
 462         printk(KERN_INFO "applesmc: device successfully initialized.\n");
 463         return 0;
 464 }
 465
 466 static int applesmc_resume(struct platform_device *dev)
 467 {
 468         return applesmc_device_init();
 469 }
 470
 471 static struct platform_driver applesmc_driver = {
 472         .probe = applesmc_probe,
 473         .resume = applesmc_resume,
 474         .driver = {
 475                 .name = "applesmc",
 476                 .owner = THIS_MODULE,
 477         },
 478 };
 479
 480 /*
 481  * applesmc_calibrate - Set our "resting" values.  Callers must
 482  * hold applesmc_lock.
 483  */
 484 static void applesmc_calibrate(void)
 485 {
 486         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
 487         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
 488         rest_x = -rest_x;
 489 }
 490
 491 static void applesmc_idev_poll(struct input_polled_dev *dev)
 492 {
 493         struct input_dev *idev = dev->input;
 494         s16 x, y;
 495
 496         mutex_lock(&applesmc_lock);
 497
 498         if (applesmc_read_motion_sensor(SENSOR_X, &x))
 499                 goto out;
 500         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
 501                 goto out;
 502
 503         x = -x;
 504         input_report_abs(idev, ABS_X, x - rest_x);
 505         input_report_abs(idev, ABS_Y, y - rest_y);
 506         input_sync(idev);
 507
 508 out:
 509         mutex_unlock(&applesmc_lock);
 510 }
 511
 512 /* Sysfs Files */
 513
 514 static ssize_t applesmc_name_show(struct device *dev,
 515                                    struct device_attribute *attr, char *buf)
 516 {
 517         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 518 }
 519
 520 static ssize_t applesmc_position_show(struct device *dev,
 521                                    struct device_attribute *attr, char *buf)
 522 {
 523         int ret;
 524         s16 x, y, z;
 525
 526         mutex_lock(&applesmc_lock);
 527
 528         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
 529         if (ret)
 530                 goto out;
 531         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
 532         if (ret)
 533                 goto out;
 534         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
 535         if (ret)
 536                 goto out;
 537
 538 out:
 539         mutex_unlock(&applesmc_lock);
 540         if (ret)
 541                 return ret;
 542         else
 543                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 544 }
 545
 546 static ssize_t applesmc_light_show(struct device *dev,
 547                                 struct device_attribute *attr, char *sysfsbuf)
 548 {
 549         static int data_length;
 550         int ret;
 551         u8 left = 0, right = 0;
 552         u8 buffer[10], query[6];
 553
 554         mutex_lock(&applesmc_lock);
 555
 556         if (!data_length) {
 557                 ret = applesmc_get_key_type(LIGHT_SENSOR_LEFT_KEY, query);
 558                 if (ret)
 559                         goto out;
 560                 data_length = clamp_val(query[0], 0, 10);
 561                 printk(KERN_INFO "applesmc: light sensor data length set to "
 562                         "%d\n", data_length);
 563         }
 564
 565         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
 566         left = buffer[2];
 567         if (ret)
 568                 goto out;
 569         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
 570         right = buffer[2];
 571
 572 out:
 573         mutex_unlock(&applesmc_lock);
 574         if (ret)
 575                 return ret;
 576         else
 577                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 578 }
 579
 580 /* Displays degree Celsius * 1000 */
 581 static ssize_t applesmc_show_temperature(struct device *dev,
 582                         struct device_attribute *devattr, char *sysfsbuf)
 583 {
 584         int ret;
 585         u8 buffer[2];
 586         unsigned int temp;
 587         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 588         const char* key =
 589                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
 590
 591         mutex_lock(&applesmc_lock);
 592
 593         ret = applesmc_read_key(key, buffer, 2);
 594         temp = buffer[0]*1000;
 595         temp += (buffer[1] >> 6) * 250;
 596
 597         mutex_unlock(&applesmc_lock);
 598
 599         if (ret)
 600                 return ret;
 601         else
 602                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
 603 }
 604
 605 static ssize_t applesmc_show_fan_speed(struct device *dev,
 606                                 struct device_attribute *attr, char *sysfsbuf)
 607 {
 608         int ret;
 609         unsigned int speed = 0;
 610         char newkey[5];
 611         u8 buffer[2];
 612         struct sensor_device_attribute_2 *sensor_attr =
 613                                                 to_sensor_dev_attr_2(attr);
 614
 615         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 616         newkey[1] = '0' + sensor_attr->index;
 617         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 618         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 619         newkey[4] = 0;
 620
 621         mutex_lock(&applesmc_lock);
 622
 623         ret = applesmc_read_key(newkey, buffer, 2);
 624         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 625
 626         mutex_unlock(&applesmc_lock);
 627         if (ret)
 628                 return ret;
 629         else
 630                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 631 }
 632
 633 static ssize_t applesmc_store_fan_speed(struct device *dev,
 634                                         struct device_attribute *attr,
 635                                         const char *sysfsbuf, size_t count)
 636 {
 637         int ret;
 638         u32 speed;
 639         char newkey[5];
 640         u8 buffer[2];
 641         struct sensor_device_attribute_2 *sensor_attr =
 642                                                 to_sensor_dev_attr_2(attr);
 643
 644         speed = simple_strtoul(sysfsbuf, NULL, 10);
 645
 646         if (speed > 0x4000) /* Bigger than a 14-bit value */
 647                 return -EINVAL;
 648
 649         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 650         newkey[1] = '0' + sensor_attr->index;
 651         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 652         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 653         newkey[4] = 0;
 654
 655         mutex_lock(&applesmc_lock);
 656
 657         buffer[0] = (speed >> 6) & 0xff;
 658         buffer[1] = (speed << 2) & 0xff;
 659         ret = applesmc_write_key(newkey, buffer, 2);
 660
 661         mutex_unlock(&applesmc_lock);
 662         if (ret)
 663                 return ret;
 664         else
 665                 return count;
 666 }
 667
 668 static ssize_t applesmc_show_fan_manual(struct device *dev,
 669                         struct device_attribute *devattr, char *sysfsbuf)
 670 {
 671         int ret;
 672         u16 manual = 0;
 673         u8 buffer[2];
 674         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 675
 676         mutex_lock(&applesmc_lock);
 677
 678         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 679         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
 680
 681         mutex_unlock(&applesmc_lock);
 682         if (ret)
 683                 return ret;
 684         else
 685                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 686 }
 687
 688 static ssize_t applesmc_store_fan_manual(struct device *dev,
 689                                          struct device_attribute *devattr,
 690                                          const char *sysfsbuf, size_t count)
 691 {
 692         int ret;
 693         u8 buffer[2];
 694         u32 input;
 695         u16 val;
 696         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 697
 698         input = simple_strtoul(sysfsbuf, NULL, 10);
 699
 700         mutex_lock(&applesmc_lock);
 701
 702         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 703         val = (buffer[0] << 8 | buffer[1]);
 704         if (ret)
 705                 goto out;
 706
 707         if (input)
 708                 val = val | (0x01 << attr->index);
 709         else
 710                 val = val & ~(0x01 << attr->index);
 711
 712         buffer[0] = (val >> 8) & 0xFF;
 713         buffer[1] = val & 0xFF;
 714
 715         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 716
 717 out:
 718         mutex_unlock(&applesmc_lock);
 719         if (ret)
 720                 return ret;
 721         else
 722                 return count;
 723 }
 724
 725 static ssize_t applesmc_show_fan_position(struct device *dev,
 726                                 struct device_attribute *attr, char *sysfsbuf)
 727 {
 728         int ret;
 729         char newkey[5];
 730         u8 buffer[17];
 731         struct sensor_device_attribute_2 *sensor_attr =
 732                                                 to_sensor_dev_attr_2(attr);
 733
 734         newkey[0] = FAN_POSITION[0];
 735         newkey[1] = '0' + sensor_attr->index;
 736         newkey[2] = FAN_POSITION[2];
 737         newkey[3] = FAN_POSITION[3];
 738         newkey[4] = 0;
 739
 740         mutex_lock(&applesmc_lock);
 741
 742         ret = applesmc_read_key(newkey, buffer, 16);
 743         buffer[16] = 0;
 744
 745         mutex_unlock(&applesmc_lock);
 746         if (ret)
 747                 return ret;
 748         else
 749                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 750 }
 751
 752 static ssize_t applesmc_calibrate_show(struct device *dev,
 753                                 struct device_attribute *attr, char *sysfsbuf)
 754 {
 755         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 756 }
 757
 758 static ssize_t applesmc_calibrate_store(struct device *dev,
 759         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 760 {
 761         mutex_lock(&applesmc_lock);
 762         applesmc_calibrate();
 763         mutex_unlock(&applesmc_lock);
 764
 765         return count;
 766 }
 767
 768 /* Store the next backlight value to be written by the work */
 769 static unsigned int backlight_value;
 770
 771 static void applesmc_backlight_set(struct work_struct *work)
 772 {
 773         u8 buffer[2];
 774
 775         mutex_lock(&applesmc_lock);
 776         buffer[0] = backlight_value;
 777         buffer[1] = 0x00;
 778         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
 779         mutex_unlock(&applesmc_lock);
 780 }
 781 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 782
 783 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 784                                                 enum led_brightness value)
 785 {
 786         int ret;
 787
 788         backlight_value = value;
 789         ret = queue_work(applesmc_led_wq, &backlight_work);
 790
 791         if (debug && (!ret))
 792                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
 793 }
 794
 795 static ssize_t applesmc_key_count_show(struct device *dev,
 796                                 struct device_attribute *attr, char *sysfsbuf)
 797 {
 798         int ret;
 799         u8 buffer[4];
 800         u32 count;
 801
 802         mutex_lock(&applesmc_lock);
 803
 804         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 805         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 806                                                 ((u32)buffer[2]<<8) + buffer[3];
 807
 808         mutex_unlock(&applesmc_lock);
 809         if (ret)
 810                 return ret;
 811         else
 812                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 813 }
 814
 815 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 816                                 struct device_attribute *attr, char *sysfsbuf)
 817 {
 818         char key[5];
 819         char info[6];
 820         int ret;
 821
 822         mutex_lock(&applesmc_lock);
 823
 824         ret = applesmc_get_key_at_index(key_at_index, key);
 825
 826         if (ret || !key[0]) {
 827                 mutex_unlock(&applesmc_lock);
 828
 829                 return -EINVAL;
 830         }
 831
 832         ret = applesmc_get_key_type(key, info);
 833
 834         if (ret) {
 835                 mutex_unlock(&applesmc_lock);
 836
 837                 return ret;
 838         }
 839
 840         /*
 841          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
 842          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
 843          */
 844         ret = applesmc_read_key(key, sysfsbuf, info[0]);
 845
 846         mutex_unlock(&applesmc_lock);
 847
 848         if (!ret) {
 849                 return info[0];
 850         } else {
 851                 return ret;
 852         }
 853 }
 854
 855 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 856                                 struct device_attribute *attr, char *sysfsbuf)
 857 {
 858         char key[5];
 859         char info[6];
 860         int ret;
 861
 862         mutex_lock(&applesmc_lock);
 863
 864         ret = applesmc_get_key_at_index(key_at_index, key);
 865
 866         if (ret || !key[0]) {
 867                 mutex_unlock(&applesmc_lock);
 868
 869                 return -EINVAL;
 870         }
 871
 872         ret = applesmc_get_key_type(key, info);
 873
 874         mutex_unlock(&applesmc_lock);
 875
 876         if (!ret)
 877                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
 878         else
 879                 return ret;
 880 }
 881
 882 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 883                                 struct device_attribute *attr, char *sysfsbuf)
 884 {
 885         char key[5];
 886         char info[6];
 887         int ret;
 888
 889         mutex_lock(&applesmc_lock);
 890
 891         ret = applesmc_get_key_at_index(key_at_index, key);
 892
 893         if (ret || !key[0]) {
 894                 mutex_unlock(&applesmc_lock);
 895
 896                 return -EINVAL;
 897         }
 898
 899         ret = applesmc_get_key_type(key, info);
 900
 901         mutex_unlock(&applesmc_lock);
 902
 903         if (!ret)
 904                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
 905         else
 906                 return ret;
 907 }
 908
 909 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 910                                 struct device_attribute *attr, char *sysfsbuf)
 911 {
 912         char key[5];
 913         int ret;
 914
 915         mutex_lock(&applesmc_lock);
 916
 917         ret = applesmc_get_key_at_index(key_at_index, key);
 918
 919         mutex_unlock(&applesmc_lock);
 920
 921         if (!ret && key[0])
 922                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 923         else
 924                 return -EINVAL;
 925 }
 926
 927 static ssize_t applesmc_key_at_index_show(struct device *dev,
 928                                 struct device_attribute *attr, char *sysfsbuf)
 929 {
 930         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
 931 }
 932
 933 static ssize_t applesmc_key_at_index_store(struct device *dev,
 934         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 935 {
 936         mutex_lock(&applesmc_lock);
 937
 938         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
 939
 940         mutex_unlock(&applesmc_lock);
 941
 942         return count;
 943 }
 944
 945 static struct led_classdev applesmc_backlight = {
 946         .name                   = "smc::kbd_backlight",
 947         .default_trigger        = "nand-disk",
 948         .brightness_set         = applesmc_brightness_set,
 949 };
 950
 951 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
 952
 953 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
 954 static DEVICE_ATTR(calibrate, 0644,
 955                         applesmc_calibrate_show, applesmc_calibrate_store);
 956
 957 static struct attribute *accelerometer_attributes[] = {
 958         &dev_attr_position.attr,
 959         &dev_attr_calibrate.attr,
 960         NULL
 961 };
 962
 963 static const struct attribute_group accelerometer_attributes_group =
 964         { .attrs = accelerometer_attributes };
 965
 966 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
 967
 968 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
 969 static DEVICE_ATTR(key_at_index, 0644,
 970                 applesmc_key_at_index_show, applesmc_key_at_index_store);
 971 static DEVICE_ATTR(key_at_index_name, 0444,
 972                                         applesmc_key_at_index_name_show, NULL);
 973 static DEVICE_ATTR(key_at_index_type, 0444,
 974                                         applesmc_key_at_index_type_show, NULL);
 975 static DEVICE_ATTR(key_at_index_data_length, 0444,
 976                                 applesmc_key_at_index_data_length_show, NULL);
 977 static DEVICE_ATTR(key_at_index_data, 0444,
 978                                 applesmc_key_at_index_read_show, NULL);
 979
 980 static struct attribute *key_enumeration_attributes[] = {
 981         &dev_attr_key_count.attr,
 982         &dev_attr_key_at_index.attr,
 983         &dev_attr_key_at_index_name.attr,
 984         &dev_attr_key_at_index_type.attr,
 985         &dev_attr_key_at_index_data_length.attr,
 986         &dev_attr_key_at_index_data.attr,
 987         NULL
 988 };
 989
 990 static const struct attribute_group key_enumeration_group =
 991         { .attrs = key_enumeration_attributes };
 992
 993 /*
 994  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
 995  *  - show actual speed
 996  *  - show/store minimum speed
 997  *  - show maximum speed
 998  *  - show safe speed
 999  *  - show/store target speed
1000  *  - show/store manual mode
1001  */
1002 #define sysfs_fan_speeds_offset(offset) \
1003 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
1004                         applesmc_show_fan_speed, NULL, 0, offset-1); \
1005 \
1006 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
1007         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
1008 \
1009 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
1010                         applesmc_show_fan_speed, NULL, 2, offset-1); \
1011 \
1012 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
1013                         applesmc_show_fan_speed, NULL, 3, offset-1); \
1014 \
1015 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
1016         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
1017 \
1018 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
1019         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
1020 \
1021 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
1022         applesmc_show_fan_position, NULL, offset-1); \
1023 \
1024 static struct attribute *fan##offset##_attributes[] = { \
1025         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
1026         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
1027         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
1028         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
1029         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
1030         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
1031         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
1032         NULL \
1033 };
1034
1035 /*
1036  * Create the needed functions for each fan using the macro defined above
1037  * (4 fans are supported)
1038  */
1039 sysfs_fan_speeds_offset(1);
1040 sysfs_fan_speeds_offset(2);
1041 sysfs_fan_speeds_offset(3);
1042 sysfs_fan_speeds_offset(4);
1043
1044 static const struct attribute_group fan_attribute_groups[] = {
1045         { .attrs = fan1_attributes },
1046         { .attrs = fan2_attributes },
1047         { .attrs = fan3_attributes },
1048         { .attrs = fan4_attributes },
1049 };
1050
1051 /*
1052  * Temperature sensors sysfs entries.
1053  */
1054 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1055                                         applesmc_show_temperature, NULL, 0);
1056 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1057                                         applesmc_show_temperature, NULL, 1);
1058 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1059                                         applesmc_show_temperature, NULL, 2);
1060 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1061                                         applesmc_show_temperature, NULL, 3);
1062 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1063                                         applesmc_show_temperature, NULL, 4);
1064 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1065                                         applesmc_show_temperature, NULL, 5);
1066 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1067                                         applesmc_show_temperature, NULL, 6);
1068 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1069                                         applesmc_show_temperature, NULL, 7);
1070 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1071                                         applesmc_show_temperature, NULL, 8);
1072 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1073                                         applesmc_show_temperature, NULL, 9);
1074 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1075                                         applesmc_show_temperature, NULL, 10);
1076 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1077                                         applesmc_show_temperature, NULL, 11);
1078 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1079                                         applesmc_show_temperature, NULL, 12);
1080 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1081                                         applesmc_show_temperature, NULL, 13);
1082 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1083                                         applesmc_show_temperature, NULL, 14);
1084 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1085                                         applesmc_show_temperature, NULL, 15);
1086 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1087                                         applesmc_show_temperature, NULL, 16);
1088 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1089                                         applesmc_show_temperature, NULL, 17);
1090 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1091                                         applesmc_show_temperature, NULL, 18);
1092 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1093                                         applesmc_show_temperature, NULL, 19);
1094 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1095                                         applesmc_show_temperature, NULL, 20);
1096 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1097                                         applesmc_show_temperature, NULL, 21);
1098 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1099                                         applesmc_show_temperature, NULL, 22);
1100 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1101                                         applesmc_show_temperature, NULL, 23);
1102 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1103                                         applesmc_show_temperature, NULL, 24);
1104 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1105                                         applesmc_show_temperature, NULL, 25);
1106 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1107                                         applesmc_show_temperature, NULL, 26);
1108 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1109                                         applesmc_show_temperature, NULL, 27);
1110 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1111                                         applesmc_show_temperature, NULL, 28);
1112 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1113                                         applesmc_show_temperature, NULL, 29);
1114 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1115                                         applesmc_show_temperature, NULL, 30);
1116 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1117                                         applesmc_show_temperature, NULL, 31);
1118 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1119                                         applesmc_show_temperature, NULL, 32);
1120 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1121                                         applesmc_show_temperature, NULL, 33);
1122 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1123                                         applesmc_show_temperature, NULL, 34);
1124
1125 static struct attribute *temperature_attributes[] = {
1126         &sensor_dev_attr_temp1_input.dev_attr.attr,
1127         &sensor_dev_attr_temp2_input.dev_attr.attr,
1128         &sensor_dev_attr_temp3_input.dev_attr.attr,
1129         &sensor_dev_attr_temp4_input.dev_attr.attr,
1130         &sensor_dev_attr_temp5_input.dev_attr.attr,
1131         &sensor_dev_attr_temp6_input.dev_attr.attr,
1132         &sensor_dev_attr_temp7_input.dev_attr.attr,
1133         &sensor_dev_attr_temp8_input.dev_attr.attr,
1134         &sensor_dev_attr_temp9_input.dev_attr.attr,
1135         &sensor_dev_attr_temp10_input.dev_attr.attr,
1136         &sensor_dev_attr_temp11_input.dev_attr.attr,
1137         &sensor_dev_attr_temp12_input.dev_attr.attr,
1138         &sensor_dev_attr_temp13_input.dev_attr.attr,
1139         &sensor_dev_attr_temp14_input.dev_attr.attr,
1140         &sensor_dev_attr_temp15_input.dev_attr.attr,
1141         &sensor_dev_attr_temp16_input.dev_attr.attr,
1142         &sensor_dev_attr_temp17_input.dev_attr.attr,
1143         &sensor_dev_attr_temp18_input.dev_attr.attr,
1144         &sensor_dev_attr_temp19_input.dev_attr.attr,
1145         &sensor_dev_attr_temp20_input.dev_attr.attr,
1146         &sensor_dev_attr_temp21_input.dev_attr.attr,
1147         &sensor_dev_attr_temp22_input.dev_attr.attr,
1148         &sensor_dev_attr_temp23_input.dev_attr.attr,
1149         &sensor_dev_attr_temp24_input.dev_attr.attr,
1150         &sensor_dev_attr_temp25_input.dev_attr.attr,
1151         &sensor_dev_attr_temp26_input.dev_attr.attr,
1152         &sensor_dev_attr_temp27_input.dev_attr.attr,
1153         &sensor_dev_attr_temp28_input.dev_attr.attr,
1154         &sensor_dev_attr_temp29_input.dev_attr.attr,
1155         &sensor_dev_attr_temp30_input.dev_attr.attr,
1156         &sensor_dev_attr_temp31_input.dev_attr.attr,
1157         &sensor_dev_attr_temp32_input.dev_attr.attr,
1158         &sensor_dev_attr_temp33_input.dev_attr.attr,
1159         &sensor_dev_attr_temp34_input.dev_attr.attr,
1160         &sensor_dev_attr_temp35_input.dev_attr.attr,
1161         NULL
1162 };
1163
1164 static const struct attribute_group temperature_attributes_group =
1165         { .attrs = temperature_attributes };
1166
1167 /* Module stuff */
1168
1169 /*
1170  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1171  */
1172 static int applesmc_dmi_match(const struct dmi_system_id *id)
1173 {
1174         int i = 0;
1175         struct dmi_match_data* dmi_data = id->driver_data;
1176         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1177         applesmc_accelerometer = dmi_data->accelerometer;
1178         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1179                                 applesmc_accelerometer ? "with" : "without");
1180         applesmc_light = dmi_data->light;
1181         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1182                                         applesmc_light ? "with" : "without");
1183
1184         applesmc_temperature_set =  dmi_data->temperature_set;
1185         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1186                 i++;
1187         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1188         return 1;
1189 }
1190
1191 /* Create accelerometer ressources */
1192 static int applesmc_create_accelerometer(void)
1193 {
1194         struct input_dev *idev;
1195         int ret;
1196
1197         ret = sysfs_create_group(&pdev->dev.kobj,
1198                                         &accelerometer_attributes_group);
1199         if (ret)
1200                 goto out;
1201
1202         applesmc_idev = input_allocate_polled_device();
1203         if (!applesmc_idev) {
1204                 ret = -ENOMEM;
1205                 goto out_sysfs;
1206         }
1207
1208         applesmc_idev->poll = applesmc_idev_poll;
1209         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1210
1211         /* initial calibrate for the input device */
1212         applesmc_calibrate();
1213
1214         /* initialize the input device */
1215         idev = applesmc_idev->input;
1216         idev->name = "applesmc";
1217         idev->id.bustype = BUS_HOST;
1218         idev->dev.parent = &pdev->dev;
1219         idev->evbit[0] = BIT_MASK(EV_ABS);
1220         input_set_abs_params(idev, ABS_X,
1221                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1222         input_set_abs_params(idev, ABS_Y,
1223                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1224
1225         ret = input_register_polled_device(applesmc_idev);
1226         if (ret)
1227                 goto out_idev;
1228
1229         return 0;
1230
1231 out_idev:
1232         input_free_polled_device(applesmc_idev);
1233
1234 out_sysfs:
1235         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1236
1237 out:
1238         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1239         return ret;
1240 }
1241
1242 /* Release all ressources used by the accelerometer */
1243 static void applesmc_release_accelerometer(void)
1244 {
1245         input_unregister_polled_device(applesmc_idev);
1246         input_free_polled_device(applesmc_idev);
1247         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1248 }
1249
1250 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1251 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1252         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1253 /* MacBook2: accelerometer and temperature set 1 */
1254         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1255 /* MacBook: accelerometer and temperature set 2 */
1256         { .accelerometer = 1, .light = 0, .temperature_set = 2 },
1257 /* MacMini: temperature set 3 */
1258         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1259 /* MacPro: temperature set 4 */
1260         { .accelerometer = 0, .light = 0, .temperature_set = 4 },
1261 /* iMac: temperature set 5 */
1262         { .accelerometer = 0, .light = 0, .temperature_set = 5 },
1263 /* MacBook3: accelerometer and temperature set 6 */
1264         { .accelerometer = 1, .light = 0, .temperature_set = 6 },
1265 /* MacBook Air: accelerometer, backlight and temperature set 7 */
1266         { .accelerometer = 1, .light = 1, .temperature_set = 7 },
1267 };
1268
1269 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1270  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1271 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1272         { applesmc_dmi_match, "Apple MacBook Air", {
1273           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1274           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1275                 (void*)&applesmc_dmi_data[7]},
1276         { applesmc_dmi_match, "Apple MacBook Pro", {
1277           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1278           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1279                 (void*)&applesmc_dmi_data[0]},
1280         { applesmc_dmi_match, "Apple MacBook (v2)", {
1281           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1282           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook2") },
1283                 (void*)&applesmc_dmi_data[1]},
1284         { applesmc_dmi_match, "Apple MacBook (v3)", {
1285           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1286           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook3") },
1287                 (void*)&applesmc_dmi_data[6]},
1288         { applesmc_dmi_match, "Apple MacBook", {
1289           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1290           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1291                 (void*)&applesmc_dmi_data[2]},
1292         { applesmc_dmi_match, "Apple Macmini", {
1293           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1294           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1295                 (void*)&applesmc_dmi_data[3]},
1296         { applesmc_dmi_match, "Apple MacPro2", {
1297           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1298           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1299                 (void*)&applesmc_dmi_data[4]},
1300         { applesmc_dmi_match, "Apple iMac", {
1301           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1302           DMI_MATCH(DMI_PRODUCT_NAME,"iMac") },
1303                 (void*)&applesmc_dmi_data[5]},
1304         { .ident = NULL }
1305 };
1306
1307 static int __init applesmc_init(void)
1308 {
1309         int ret;
1310         int count;
1311         int i;
1312
1313         if (!dmi_check_system(applesmc_whitelist)) {
1314                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1315                 ret = -ENODEV;
1316                 goto out;
1317         }
1318
1319         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1320                                                                 "applesmc")) {
1321                 ret = -ENXIO;
1322                 goto out;
1323         }
1324
1325         ret = platform_driver_register(&applesmc_driver);
1326         if (ret)
1327                 goto out_region;
1328
1329         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1330                                                NULL, 0);
1331         if (IS_ERR(pdev)) {
1332                 ret = PTR_ERR(pdev);
1333                 goto out_driver;
1334         }
1335
1336         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1337         if (ret)
1338                 goto out_device;
1339
1340         /* Create key enumeration sysfs files */
1341         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1342         if (ret)
1343                 goto out_name;
1344
1345         /* create fan files */
1346         count = applesmc_get_fan_count();
1347         if (count < 0) {
1348                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1349         } else {
1350                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1351
1352                 switch (count) {
1353                 default:
1354                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1355                                         " but at most 4 fans are supported"
1356                                                 " by the driver.\n");
1357                 case 4:
1358                         ret = sysfs_create_group(&pdev->dev.kobj,
1359                                                  &fan_attribute_groups[3]);
1360                         if (ret)
1361                                 goto out_key_enumeration;
1362                 case 3:
1363                         ret = sysfs_create_group(&pdev->dev.kobj,
1364                                                  &fan_attribute_groups[2]);
1365                         if (ret)
1366                                 goto out_key_enumeration;
1367                 case 2:
1368                         ret = sysfs_create_group(&pdev->dev.kobj,
1369                                                  &fan_attribute_groups[1]);
1370                         if (ret)
1371                                 goto out_key_enumeration;
1372                 case 1:
1373                         ret = sysfs_create_group(&pdev->dev.kobj,
1374                                                  &fan_attribute_groups[0]);
1375                         if (ret)
1376                                 goto out_fan_1;
1377                 case 0:
1378                         ;
1379                 }
1380         }
1381
1382         for (i = 0;
1383              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1384              i++) {
1385                 if (temperature_attributes[i] == NULL) {
1386                         printk(KERN_ERR "applesmc: More temperature sensors "
1387                                 "in temperature_sensors_sets (at least %i)"
1388                                 "than available sysfs files in "
1389                                 "temperature_attributes (%i), please report "
1390                                 "this bug.\n", i, i-1);
1391                         goto out_temperature;
1392                 }
1393                 ret = sysfs_create_file(&pdev->dev.kobj,
1394                                                 temperature_attributes[i]);
1395                 if (ret)
1396                         goto out_temperature;
1397         }
1398
1399         if (applesmc_accelerometer) {
1400                 ret = applesmc_create_accelerometer();
1401                 if (ret)
1402                         goto out_temperature;
1403         }
1404
1405         if (applesmc_light) {
1406                 /* Add light sensor file */
1407                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1408                 if (ret)
1409                         goto out_accelerometer;
1410
1411                 /* Create the workqueue */
1412                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1413                 if (!applesmc_led_wq) {
1414                         ret = -ENOMEM;
1415                         goto out_light_sysfs;
1416                 }
1417
1418                 /* register as a led device */
1419                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1420                 if (ret < 0)
1421                         goto out_light_wq;
1422         }
1423
1424         hwmon_dev = hwmon_device_register(&pdev->dev);
1425         if (IS_ERR(hwmon_dev)) {
1426                 ret = PTR_ERR(hwmon_dev);
1427                 goto out_light_ledclass;
1428         }
1429
1430         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1431
1432         return 0;
1433
1434 out_light_ledclass:
1435         if (applesmc_light)
1436                 led_classdev_unregister(&applesmc_backlight);
1437 out_light_wq:
1438         if (applesmc_light)
1439                 destroy_workqueue(applesmc_led_wq);
1440 out_light_sysfs:
1441         if (applesmc_light)
1442                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1443 out_accelerometer:
1444         if (applesmc_accelerometer)
1445                 applesmc_release_accelerometer();
1446 out_temperature:
1447         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1448         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1449 out_fan_1:
1450         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1451 out_key_enumeration:
1452         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1453 out_name:
1454         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1455 out_device:
1456         platform_device_unregister(pdev);
1457 out_driver:
1458         platform_driver_unregister(&applesmc_driver);
1459 out_region:
1460         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1461 out:
1462         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1463         return ret;
1464 }
1465
1466 static void __exit applesmc_exit(void)
1467 {
1468         hwmon_device_unregister(hwmon_dev);
1469         if (applesmc_light) {
1470                 led_classdev_unregister(&applesmc_backlight);
1471                 destroy_workqueue(applesmc_led_wq);
1472                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1473         }
1474         if (applesmc_accelerometer)
1475                 applesmc_release_accelerometer();
1476         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1477         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1478         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1479         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1480         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1481         platform_device_unregister(pdev);
1482         platform_driver_unregister(&applesmc_driver);
1483         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1484
1485         printk(KERN_INFO "applesmc: driver unloaded.\n");
1486 }
1487
1488 module_init(applesmc_init);
1489 module_exit(applesmc_exit);
1490
1491 MODULE_AUTHOR("Nicolas Boichat");
1492 MODULE_DESCRIPTION("Apple SMC");
1493 MODULE_LICENSE("GPL v2");