err.no Git - linux-2.6/blob - 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 /* Set 5: iMac */
 102         { "TC0D", "TA0P", "TG0P", "TG0D", "TG0H", "TH0P", "Tm0P", "TO0P",
 103           "Tp0C", NULL },
 104 };
 105
 106 /* List of keys used to read/write fan speeds */
 107 static const char* fan_speed_keys[] = {
 108         FAN_ACTUAL_SPEED,
 109         FAN_MIN_SPEED,
 110         FAN_MAX_SPEED,
 111         FAN_SAFE_SPEED,
 112         FAN_TARGET_SPEED
 113 };
 114
 115 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
 116 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
 117
 118 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
 119 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 120 #define APPLESMC_INPUT_FLAT     4
 121
 122 #define SENSOR_X 0
 123 #define SENSOR_Y 1
 124 #define SENSOR_Z 2
 125
 126 /* Structure to be passed to DMI_MATCH function */
 127 struct dmi_match_data {
 128 /* Indicates whether this computer has an accelerometer. */
 129         int accelerometer;
 130 /* Indicates whether this computer has light sensors and keyboard backlight. */
 131         int light;
 132 /* Indicates which temperature sensors set to use. */
 133         int temperature_set;
 134 };
 135
 136 static const int debug;
 137 static struct platform_device *pdev;
 138 static s16 rest_x;
 139 static s16 rest_y;
 140 static struct device *hwmon_dev;
 141 static struct input_polled_dev *applesmc_idev;
 142
 143 /* Indicates whether this computer has an accelerometer. */
 144 static unsigned int applesmc_accelerometer;
 145
 146 /* Indicates whether this computer has light sensors and keyboard backlight. */
 147 static unsigned int applesmc_light;
 148
 149 /* Indicates which temperature sensors set to use. */
 150 static unsigned int applesmc_temperature_set;
 151
 152 static DEFINE_MUTEX(applesmc_lock);
 153
 154 /*
 155  * Last index written to key_at_index sysfs file, and value to use for all other
 156  * key_at_index_* sysfs files.
 157  */
 158 static unsigned int key_at_index;
 159
 160 static struct workqueue_struct *applesmc_led_wq;
 161
 162 /*
 163  * __wait_status - Wait up to 2ms for the status port to get a certain value
 164  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 165  * hold applesmc_lock.
 166  */
 167 static int __wait_status(u8 val)
 168 {
 169         unsigned int i;
 170
 171         val = val & APPLESMC_STATUS_MASK;
 172
 173         for (i = 0; i < 200; i++) {
 174                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
 175                         if (debug)
 176                                 printk(KERN_DEBUG
 177                                                 "Waited %d us for status %x\n",
 178                                                 i*10, val);
 179                         return 0;
 180                 }
 181                 udelay(10);
 182         }
 183
 184         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
 185                                                 val, inb(APPLESMC_CMD_PORT));
 186
 187         return -EIO;
 188 }
 189
 190 /*
 191  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 192  * Returns zero on success or a negative error on failure. Callers must
 193  * hold applesmc_lock.
 194  */
 195 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
 196 {
 197         int i;
 198
 199         if (len > APPLESMC_MAX_DATA_LENGTH) {
 200                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
 201                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 202                 return -EINVAL;
 203         }
 204
 205         outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT);
 206         if (__wait_status(0x0c))
 207                 return -EIO;
 208
 209         for (i = 0; i < 4; i++) {
 210                 outb(key[i], APPLESMC_DATA_PORT);
 211                 if (__wait_status(0x04))
 212                         return -EIO;
 213         }
 214         if (debug)
 215                 printk(KERN_DEBUG "<%s", key);
 216
 217         outb(len, APPLESMC_DATA_PORT);
 218         if (debug)
 219                 printk(KERN_DEBUG ">%x", len);
 220
 221         for (i = 0; i < len; i++) {
 222                 if (__wait_status(0x05))
 223                         return -EIO;
 224                 buffer[i] = inb(APPLESMC_DATA_PORT);
 225                 if (debug)
 226                         printk(KERN_DEBUG "<%x", buffer[i]);
 227         }
 228         if (debug)
 229                 printk(KERN_DEBUG "\n");
 230
 231         return 0;
 232 }
 233
 234 /*
 235  * applesmc_write_key - writes len bytes from buffer to a given key.
 236  * Returns zero on success or a negative error on failure. Callers must
 237  * hold applesmc_lock.
 238  */
 239 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
 240 {
 241         int i;
 242
 243         if (len > APPLESMC_MAX_DATA_LENGTH) {
 244                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
 245                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 246                 return -EINVAL;
 247         }
 248
 249         outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT);
 250         if (__wait_status(0x0c))
 251                 return -EIO;
 252
 253         for (i = 0; i < 4; i++) {
 254                 outb(key[i], APPLESMC_DATA_PORT);
 255                 if (__wait_status(0x04))
 256                         return -EIO;
 257         }
 258
 259         outb(len, APPLESMC_DATA_PORT);
 260
 261         for (i = 0; i < len; i++) {
 262                 if (__wait_status(0x04))
 263                         return -EIO;
 264                 outb(buffer[i], APPLESMC_DATA_PORT);
 265         }
 266
 267         return 0;
 268 }
 269
 270 /*
 271  * applesmc_get_key_at_index - get key at index, and put the result in key
 272  * (char[6]). Returns zero on success or a negative error on failure. Callers
 273  * must hold applesmc_lock.
 274  */
 275 static int applesmc_get_key_at_index(int index, char* key)
 276 {
 277         int i;
 278         u8 readkey[4];
 279         readkey[0] = index >> 24;
 280         readkey[1] = index >> 16;
 281         readkey[2] = index >> 8;
 282         readkey[3] = index;
 283
 284         outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT);
 285         if (__wait_status(0x0c))
 286                 return -EIO;
 287
 288         for (i = 0; i < 4; i++) {
 289                 outb(readkey[i], APPLESMC_DATA_PORT);
 290                 if (__wait_status(0x04))
 291                         return -EIO;
 292         }
 293
 294         outb(4, APPLESMC_DATA_PORT);
 295
 296         for (i = 0; i < 4; i++) {
 297                 if (__wait_status(0x05))
 298                         return -EIO;
 299                 key[i] = inb(APPLESMC_DATA_PORT);
 300         }
 301         key[4] = 0;
 302
 303         return 0;
 304 }
 305
 306 /*
 307  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 308  * Returns zero on success or a negative error on failure. Callers must
 309  * hold applesmc_lock.
 310  */
 311 static int applesmc_get_key_type(char* key, char* type)
 312 {
 313         int i;
 314
 315         outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT);
 316         if (__wait_status(0x0c))
 317                 return -EIO;
 318
 319         for (i = 0; i < 4; i++) {
 320                 outb(key[i], APPLESMC_DATA_PORT);
 321                 if (__wait_status(0x04))
 322                         return -EIO;
 323         }
 324
 325         outb(5, APPLESMC_DATA_PORT);
 326
 327         for (i = 0; i < 6; i++) {
 328                 if (__wait_status(0x05))
 329                         return -EIO;
 330                 type[i] = inb(APPLESMC_DATA_PORT);
 331         }
 332         type[5] = 0;
 333
 334         return 0;
 335 }
 336
 337 /*
 338  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 339  * hold applesmc_lock.
 340  */
 341 static int applesmc_read_motion_sensor(int index, s16* value)
 342 {
 343         u8 buffer[2];
 344         int ret;
 345
 346         switch (index) {
 347         case SENSOR_X:
 348                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
 349                 break;
 350         case SENSOR_Y:
 351                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
 352                 break;
 353         case SENSOR_Z:
 354                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 355                 break;
 356         default:
 357                 ret = -EINVAL;
 358         }
 359
 360         *value = ((s16)buffer[0] << 8) | buffer[1];
 361
 362         return ret;
 363 }
 364
 365 /*
 366  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 367  * and negative error code on failure.  Can sleep.
 368  */
 369 static int applesmc_device_init(void)
 370 {
 371         int total, ret = -ENXIO;
 372         u8 buffer[2];
 373
 374         if (!applesmc_accelerometer)
 375                 return 0;
 376
 377         mutex_lock(&applesmc_lock);
 378
 379         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 380                 if (debug)
 381                         printk(KERN_DEBUG "applesmc try %d\n", total);
 382                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 383                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
 384                         if (total == INIT_TIMEOUT_MSECS) {
 385                                 printk(KERN_DEBUG "applesmc: device has"
 386                                                 " already been initialized"
 387                                                 " (0x%02x, 0x%02x).\n",
 388                                                 buffer[0], buffer[1]);
 389                         } else {
 390                                 printk(KERN_DEBUG "applesmc: device"
 391                                                 " successfully initialized"
 392                                                 " (0x%02x, 0x%02x).\n",
 393                                                 buffer[0], buffer[1]);
 394                         }
 395                         ret = 0;
 396                         goto out;
 397                 }
 398                 buffer[0] = 0xe0;
 399                 buffer[1] = 0x00;
 400                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 401                 msleep(INIT_WAIT_MSECS);
 402         }
 403
 404         printk(KERN_WARNING "applesmc: failed to init the device\n");
 405
 406 out:
 407         mutex_unlock(&applesmc_lock);
 408         return ret;
 409 }
 410
 411 /*
 412  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 413  * applesmc_lock.
 414  */
 415 static int applesmc_get_fan_count(void)
 416 {
 417         int ret;
 418         u8 buffer[1];
 419
 420         mutex_lock(&applesmc_lock);
 421
 422         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
 423
 424         mutex_unlock(&applesmc_lock);
 425         if (ret)
 426                 return ret;
 427         else
 428                 return buffer[0];
 429 }
 430
 431 /* Device model stuff */
 432 static int applesmc_probe(struct platform_device *dev)
 433 {
 434         int ret;
 435
 436         ret = applesmc_device_init();
 437         if (ret)
 438                 return ret;
 439
 440         printk(KERN_INFO "applesmc: device successfully initialized.\n");
 441         return 0;
 442 }
 443
 444 static int applesmc_resume(struct platform_device *dev)
 445 {
 446         return applesmc_device_init();
 447 }
 448
 449 static struct platform_driver applesmc_driver = {
 450         .probe = applesmc_probe,
 451         .resume = applesmc_resume,
 452         .driver = {
 453                 .name = "applesmc",
 454                 .owner = THIS_MODULE,
 455         },
 456 };
 457
 458 /*
 459  * applesmc_calibrate - Set our "resting" values.  Callers must
 460  * hold applesmc_lock.
 461  */
 462 static void applesmc_calibrate(void)
 463 {
 464         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
 465         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
 466         rest_x = -rest_x;
 467 }
 468
 469 static void applesmc_idev_poll(struct input_polled_dev *dev)
 470 {
 471         struct input_dev *idev = dev->input;
 472         s16 x, y;
 473
 474         mutex_lock(&applesmc_lock);
 475
 476         if (applesmc_read_motion_sensor(SENSOR_X, &x))
 477                 goto out;
 478         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
 479                 goto out;
 480
 481         x = -x;
 482         input_report_abs(idev, ABS_X, x - rest_x);
 483         input_report_abs(idev, ABS_Y, y - rest_y);
 484         input_sync(idev);
 485
 486 out:
 487         mutex_unlock(&applesmc_lock);
 488 }
 489
 490 /* Sysfs Files */
 491
 492 static ssize_t applesmc_name_show(struct device *dev,
 493                                    struct device_attribute *attr, char *buf)
 494 {
 495         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 496 }
 497
 498 static ssize_t applesmc_position_show(struct device *dev,
 499                                    struct device_attribute *attr, char *buf)
 500 {
 501         int ret;
 502         s16 x, y, z;
 503
 504         mutex_lock(&applesmc_lock);
 505
 506         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
 507         if (ret)
 508                 goto out;
 509         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
 510         if (ret)
 511                 goto out;
 512         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
 513         if (ret)
 514                 goto out;
 515
 516 out:
 517         mutex_unlock(&applesmc_lock);
 518         if (ret)
 519                 return ret;
 520         else
 521                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 522 }
 523
 524 static ssize_t applesmc_light_show(struct device *dev,
 525                                 struct device_attribute *attr, char *sysfsbuf)
 526 {
 527         int ret;
 528         u8 left = 0, right = 0;
 529         u8 buffer[6];
 530
 531         mutex_lock(&applesmc_lock);
 532
 533         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
 534         left = buffer[2];
 535         if (ret)
 536                 goto out;
 537         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
 538         right = buffer[2];
 539
 540 out:
 541         mutex_unlock(&applesmc_lock);
 542         if (ret)
 543                 return ret;
 544         else
 545                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 546 }
 547
 548 /* Displays degree Celsius * 1000 */
 549 static ssize_t applesmc_show_temperature(struct device *dev,
 550                         struct device_attribute *devattr, char *sysfsbuf)
 551 {
 552         int ret;
 553         u8 buffer[2];
 554         unsigned int temp;
 555         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 556         const char* key =
 557                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
 558
 559         mutex_lock(&applesmc_lock);
 560
 561         ret = applesmc_read_key(key, buffer, 2);
 562         temp = buffer[0]*1000;
 563         temp += (buffer[1] >> 6) * 250;
 564
 565         mutex_unlock(&applesmc_lock);
 566
 567         if (ret)
 568                 return ret;
 569         else
 570                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
 571 }
 572
 573 static ssize_t applesmc_show_fan_speed(struct device *dev,
 574                                 struct device_attribute *attr, char *sysfsbuf)
 575 {
 576         int ret;
 577         unsigned int speed = 0;
 578         char newkey[5];
 579         u8 buffer[2];
 580         struct sensor_device_attribute_2 *sensor_attr =
 581                                                 to_sensor_dev_attr_2(attr);
 582
 583         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 584         newkey[1] = '0' + sensor_attr->index;
 585         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 586         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 587         newkey[4] = 0;
 588
 589         mutex_lock(&applesmc_lock);
 590
 591         ret = applesmc_read_key(newkey, buffer, 2);
 592         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 593
 594         mutex_unlock(&applesmc_lock);
 595         if (ret)
 596                 return ret;
 597         else
 598                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 599 }
 600
 601 static ssize_t applesmc_store_fan_speed(struct device *dev,
 602                                         struct device_attribute *attr,
 603                                         const char *sysfsbuf, size_t count)
 604 {
 605         int ret;
 606         u32 speed;
 607         char newkey[5];
 608         u8 buffer[2];
 609         struct sensor_device_attribute_2 *sensor_attr =
 610                                                 to_sensor_dev_attr_2(attr);
 611
 612         speed = simple_strtoul(sysfsbuf, NULL, 10);
 613
 614         if (speed > 0x4000) /* Bigger than a 14-bit value */
 615                 return -EINVAL;
 616
 617         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 618         newkey[1] = '0' + sensor_attr->index;
 619         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 620         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 621         newkey[4] = 0;
 622
 623         mutex_lock(&applesmc_lock);
 624
 625         buffer[0] = (speed >> 6) & 0xff;
 626         buffer[1] = (speed << 2) & 0xff;
 627         ret = applesmc_write_key(newkey, buffer, 2);
 628
 629         mutex_unlock(&applesmc_lock);
 630         if (ret)
 631                 return ret;
 632         else
 633                 return count;
 634 }
 635
 636 static ssize_t applesmc_show_fan_manual(struct device *dev,
 637                         struct device_attribute *devattr, char *sysfsbuf)
 638 {
 639         int ret;
 640         u16 manual = 0;
 641         u8 buffer[2];
 642         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 643
 644         mutex_lock(&applesmc_lock);
 645
 646         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 647         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
 648
 649         mutex_unlock(&applesmc_lock);
 650         if (ret)
 651                 return ret;
 652         else
 653                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 654 }
 655
 656 static ssize_t applesmc_store_fan_manual(struct device *dev,
 657                                          struct device_attribute *devattr,
 658                                          const char *sysfsbuf, size_t count)
 659 {
 660         int ret;
 661         u8 buffer[2];
 662         u32 input;
 663         u16 val;
 664         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 665
 666         input = simple_strtoul(sysfsbuf, NULL, 10);
 667
 668         mutex_lock(&applesmc_lock);
 669
 670         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 671         val = (buffer[0] << 8 | buffer[1]);
 672         if (ret)
 673                 goto out;
 674
 675         if (input)
 676                 val = val | (0x01 << attr->index);
 677         else
 678                 val = val & ~(0x01 << attr->index);
 679
 680         buffer[0] = (val >> 8) & 0xFF;
 681         buffer[1] = val & 0xFF;
 682
 683         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 684
 685 out:
 686         mutex_unlock(&applesmc_lock);
 687         if (ret)
 688                 return ret;
 689         else
 690                 return count;
 691 }
 692
 693 static ssize_t applesmc_show_fan_position(struct device *dev,
 694                                 struct device_attribute *attr, char *sysfsbuf)
 695 {
 696         int ret;
 697         char newkey[5];
 698         u8 buffer[17];
 699         struct sensor_device_attribute_2 *sensor_attr =
 700                                                 to_sensor_dev_attr_2(attr);
 701
 702         newkey[0] = FAN_POSITION[0];
 703         newkey[1] = '0' + sensor_attr->index;
 704         newkey[2] = FAN_POSITION[2];
 705         newkey[3] = FAN_POSITION[3];
 706         newkey[4] = 0;
 707
 708         mutex_lock(&applesmc_lock);
 709
 710         ret = applesmc_read_key(newkey, buffer, 16);
 711         buffer[16] = 0;
 712
 713         mutex_unlock(&applesmc_lock);
 714         if (ret)
 715                 return ret;
 716         else
 717                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 718 }
 719
 720 static ssize_t applesmc_calibrate_show(struct device *dev,
 721                                 struct device_attribute *attr, char *sysfsbuf)
 722 {
 723         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 724 }
 725
 726 static ssize_t applesmc_calibrate_store(struct device *dev,
 727         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 728 {
 729         mutex_lock(&applesmc_lock);
 730         applesmc_calibrate();
 731         mutex_unlock(&applesmc_lock);
 732
 733         return count;
 734 }
 735
 736 /* Store the next backlight value to be written by the work */
 737 static unsigned int backlight_value;
 738
 739 static void applesmc_backlight_set(struct work_struct *work)
 740 {
 741         u8 buffer[2];
 742
 743         mutex_lock(&applesmc_lock);
 744         buffer[0] = backlight_value;
 745         buffer[1] = 0x00;
 746         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
 747         mutex_unlock(&applesmc_lock);
 748 }
 749 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 750
 751 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 752                                                 enum led_brightness value)
 753 {
 754         int ret;
 755
 756         backlight_value = value;
 757         ret = queue_work(applesmc_led_wq, &backlight_work);
 758
 759         if (debug && (!ret))
 760                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
 761 }
 762
 763 static ssize_t applesmc_key_count_show(struct device *dev,
 764                                 struct device_attribute *attr, char *sysfsbuf)
 765 {
 766         int ret;
 767         u8 buffer[4];
 768         u32 count;
 769
 770         mutex_lock(&applesmc_lock);
 771
 772         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 773         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 774                                                 ((u32)buffer[2]<<8) + buffer[3];
 775
 776         mutex_unlock(&applesmc_lock);
 777         if (ret)
 778                 return ret;
 779         else
 780                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 781 }
 782
 783 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 784                                 struct device_attribute *attr, char *sysfsbuf)
 785 {
 786         char key[5];
 787         char info[6];
 788         int ret;
 789
 790         mutex_lock(&applesmc_lock);
 791
 792         ret = applesmc_get_key_at_index(key_at_index, key);
 793
 794         if (ret || !key[0]) {
 795                 mutex_unlock(&applesmc_lock);
 796
 797                 return -EINVAL;
 798         }
 799
 800         ret = applesmc_get_key_type(key, info);
 801
 802         if (ret) {
 803                 mutex_unlock(&applesmc_lock);
 804
 805                 return ret;
 806         }
 807
 808         /*
 809          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
 810          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
 811          */
 812         ret = applesmc_read_key(key, sysfsbuf, info[0]);
 813
 814         mutex_unlock(&applesmc_lock);
 815
 816         if (!ret) {
 817                 return info[0];
 818         } else {
 819                 return ret;
 820         }
 821 }
 822
 823 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 824                                 struct device_attribute *attr, char *sysfsbuf)
 825 {
 826         char key[5];
 827         char info[6];
 828         int ret;
 829
 830         mutex_lock(&applesmc_lock);
 831
 832         ret = applesmc_get_key_at_index(key_at_index, key);
 833
 834         if (ret || !key[0]) {
 835                 mutex_unlock(&applesmc_lock);
 836
 837                 return -EINVAL;
 838         }
 839
 840         ret = applesmc_get_key_type(key, info);
 841
 842         mutex_unlock(&applesmc_lock);
 843
 844         if (!ret)
 845                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
 846         else
 847                 return ret;
 848 }
 849
 850 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 851                                 struct device_attribute *attr, char *sysfsbuf)
 852 {
 853         char key[5];
 854         char info[6];
 855         int ret;
 856
 857         mutex_lock(&applesmc_lock);
 858
 859         ret = applesmc_get_key_at_index(key_at_index, key);
 860
 861         if (ret || !key[0]) {
 862                 mutex_unlock(&applesmc_lock);
 863
 864                 return -EINVAL;
 865         }
 866
 867         ret = applesmc_get_key_type(key, info);
 868
 869         mutex_unlock(&applesmc_lock);
 870
 871         if (!ret)
 872                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
 873         else
 874                 return ret;
 875 }
 876
 877 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 878                                 struct device_attribute *attr, char *sysfsbuf)
 879 {
 880         char key[5];
 881         int ret;
 882
 883         mutex_lock(&applesmc_lock);
 884
 885         ret = applesmc_get_key_at_index(key_at_index, key);
 886
 887         mutex_unlock(&applesmc_lock);
 888
 889         if (!ret && key[0])
 890                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 891         else
 892                 return -EINVAL;
 893 }
 894
 895 static ssize_t applesmc_key_at_index_show(struct device *dev,
 896                                 struct device_attribute *attr, char *sysfsbuf)
 897 {
 898         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
 899 }
 900
 901 static ssize_t applesmc_key_at_index_store(struct device *dev,
 902         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 903 {
 904         mutex_lock(&applesmc_lock);
 905
 906         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
 907
 908         mutex_unlock(&applesmc_lock);
 909
 910         return count;
 911 }
 912
 913 static struct led_classdev applesmc_backlight = {
 914         .name                   = "smc::kbd_backlight",
 915         .default_trigger        = "nand-disk",
 916         .brightness_set         = applesmc_brightness_set,
 917 };
 918
 919 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
 920
 921 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
 922 static DEVICE_ATTR(calibrate, 0644,
 923                         applesmc_calibrate_show, applesmc_calibrate_store);
 924
 925 static struct attribute *accelerometer_attributes[] = {
 926         &dev_attr_position.attr,
 927         &dev_attr_calibrate.attr,
 928         NULL
 929 };
 930
 931 static const struct attribute_group accelerometer_attributes_group =
 932         { .attrs = accelerometer_attributes };
 933
 934 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
 935
 936 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
 937 static DEVICE_ATTR(key_at_index, 0644,
 938                 applesmc_key_at_index_show, applesmc_key_at_index_store);
 939 static DEVICE_ATTR(key_at_index_name, 0444,
 940                                         applesmc_key_at_index_name_show, NULL);
 941 static DEVICE_ATTR(key_at_index_type, 0444,
 942                                         applesmc_key_at_index_type_show, NULL);
 943 static DEVICE_ATTR(key_at_index_data_length, 0444,
 944                                 applesmc_key_at_index_data_length_show, NULL);
 945 static DEVICE_ATTR(key_at_index_data, 0444,
 946                                 applesmc_key_at_index_read_show, NULL);
 947
 948 static struct attribute *key_enumeration_attributes[] = {
 949         &dev_attr_key_count.attr,
 950         &dev_attr_key_at_index.attr,
 951         &dev_attr_key_at_index_name.attr,
 952         &dev_attr_key_at_index_type.attr,
 953         &dev_attr_key_at_index_data_length.attr,
 954         &dev_attr_key_at_index_data.attr,
 955         NULL
 956 };
 957
 958 static const struct attribute_group key_enumeration_group =
 959         { .attrs = key_enumeration_attributes };
 960
 961 /*
 962  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
 963  *  - show actual speed
 964  *  - show/store minimum speed
 965  *  - show maximum speed
 966  *  - show safe speed
 967  *  - show/store target speed
 968  *  - show/store manual mode
 969  */
 970 #define sysfs_fan_speeds_offset(offset) \
 971 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
 972                         applesmc_show_fan_speed, NULL, 0, offset-1); \
 973 \
 974 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
 975         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
 976 \
 977 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
 978                         applesmc_show_fan_speed, NULL, 2, offset-1); \
 979 \
 980 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
 981                         applesmc_show_fan_speed, NULL, 3, offset-1); \
 982 \
 983 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
 984         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
 985 \
 986 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
 987         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
 988 \
 989 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
 990         applesmc_show_fan_position, NULL, offset-1); \
 991 \
 992 static struct attribute *fan##offset##_attributes[] = { \
 993         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
 994         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
 995         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
 996         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
 997         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
 998         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
 999         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
1000         NULL \
1001 };
1002
1003 /*
1004  * Create the needed functions for each fan using the macro defined above
1005  * (4 fans are supported)
1006  */
1007 sysfs_fan_speeds_offset(1);
1008 sysfs_fan_speeds_offset(2);
1009 sysfs_fan_speeds_offset(3);
1010 sysfs_fan_speeds_offset(4);
1011
1012 static const struct attribute_group fan_attribute_groups[] = {
1013         { .attrs = fan1_attributes },
1014         { .attrs = fan2_attributes },
1015         { .attrs = fan3_attributes },
1016         { .attrs = fan4_attributes },
1017 };
1018
1019 /*
1020  * Temperature sensors sysfs entries.
1021  */
1022 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1023                                         applesmc_show_temperature, NULL, 0);
1024 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1025                                         applesmc_show_temperature, NULL, 1);
1026 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1027                                         applesmc_show_temperature, NULL, 2);
1028 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1029                                         applesmc_show_temperature, NULL, 3);
1030 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1031                                         applesmc_show_temperature, NULL, 4);
1032 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1033                                         applesmc_show_temperature, NULL, 5);
1034 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1035                                         applesmc_show_temperature, NULL, 6);
1036 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1037                                         applesmc_show_temperature, NULL, 7);
1038 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1039                                         applesmc_show_temperature, NULL, 8);
1040 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1041                                         applesmc_show_temperature, NULL, 9);
1042 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1043                                         applesmc_show_temperature, NULL, 10);
1044 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1045                                         applesmc_show_temperature, NULL, 11);
1046 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1047                                         applesmc_show_temperature, NULL, 12);
1048 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1049                                         applesmc_show_temperature, NULL, 13);
1050 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1051                                         applesmc_show_temperature, NULL, 14);
1052 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1053                                         applesmc_show_temperature, NULL, 15);
1054 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1055                                         applesmc_show_temperature, NULL, 16);
1056 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1057                                         applesmc_show_temperature, NULL, 17);
1058 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1059                                         applesmc_show_temperature, NULL, 18);
1060 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1061                                         applesmc_show_temperature, NULL, 19);
1062 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1063                                         applesmc_show_temperature, NULL, 20);
1064 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1065                                         applesmc_show_temperature, NULL, 21);
1066 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1067                                         applesmc_show_temperature, NULL, 22);
1068 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1069                                         applesmc_show_temperature, NULL, 23);
1070 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1071                                         applesmc_show_temperature, NULL, 24);
1072 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1073                                         applesmc_show_temperature, NULL, 25);
1074 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1075                                         applesmc_show_temperature, NULL, 26);
1076 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1077                                         applesmc_show_temperature, NULL, 27);
1078 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1079                                         applesmc_show_temperature, NULL, 28);
1080 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1081                                         applesmc_show_temperature, NULL, 29);
1082 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1083                                         applesmc_show_temperature, NULL, 30);
1084 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1085                                         applesmc_show_temperature, NULL, 31);
1086 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1087                                         applesmc_show_temperature, NULL, 32);
1088 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1089                                         applesmc_show_temperature, NULL, 33);
1090 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1091                                         applesmc_show_temperature, NULL, 34);
1092
1093 static struct attribute *temperature_attributes[] = {
1094         &sensor_dev_attr_temp1_input.dev_attr.attr,
1095         &sensor_dev_attr_temp2_input.dev_attr.attr,
1096         &sensor_dev_attr_temp3_input.dev_attr.attr,
1097         &sensor_dev_attr_temp4_input.dev_attr.attr,
1098         &sensor_dev_attr_temp5_input.dev_attr.attr,
1099         &sensor_dev_attr_temp6_input.dev_attr.attr,
1100         &sensor_dev_attr_temp7_input.dev_attr.attr,
1101         &sensor_dev_attr_temp8_input.dev_attr.attr,
1102         &sensor_dev_attr_temp9_input.dev_attr.attr,
1103         &sensor_dev_attr_temp10_input.dev_attr.attr,
1104         &sensor_dev_attr_temp11_input.dev_attr.attr,
1105         &sensor_dev_attr_temp12_input.dev_attr.attr,
1106         &sensor_dev_attr_temp13_input.dev_attr.attr,
1107         &sensor_dev_attr_temp14_input.dev_attr.attr,
1108         &sensor_dev_attr_temp15_input.dev_attr.attr,
1109         &sensor_dev_attr_temp16_input.dev_attr.attr,
1110         &sensor_dev_attr_temp17_input.dev_attr.attr,
1111         &sensor_dev_attr_temp18_input.dev_attr.attr,
1112         &sensor_dev_attr_temp19_input.dev_attr.attr,
1113         &sensor_dev_attr_temp20_input.dev_attr.attr,
1114         &sensor_dev_attr_temp21_input.dev_attr.attr,
1115         &sensor_dev_attr_temp22_input.dev_attr.attr,
1116         &sensor_dev_attr_temp23_input.dev_attr.attr,
1117         &sensor_dev_attr_temp24_input.dev_attr.attr,
1118         &sensor_dev_attr_temp25_input.dev_attr.attr,
1119         &sensor_dev_attr_temp26_input.dev_attr.attr,
1120         &sensor_dev_attr_temp27_input.dev_attr.attr,
1121         &sensor_dev_attr_temp28_input.dev_attr.attr,
1122         &sensor_dev_attr_temp29_input.dev_attr.attr,
1123         &sensor_dev_attr_temp30_input.dev_attr.attr,
1124         &sensor_dev_attr_temp31_input.dev_attr.attr,
1125         &sensor_dev_attr_temp32_input.dev_attr.attr,
1126         &sensor_dev_attr_temp33_input.dev_attr.attr,
1127         &sensor_dev_attr_temp34_input.dev_attr.attr,
1128         &sensor_dev_attr_temp35_input.dev_attr.attr,
1129         NULL
1130 };
1131
1132 static const struct attribute_group temperature_attributes_group =
1133         { .attrs = temperature_attributes };
1134
1135 /* Module stuff */
1136
1137 /*
1138  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1139  */
1140 static int applesmc_dmi_match(const struct dmi_system_id *id)
1141 {
1142         int i = 0;
1143         struct dmi_match_data* dmi_data = id->driver_data;
1144         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1145         applesmc_accelerometer = dmi_data->accelerometer;
1146         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1147                                 applesmc_accelerometer ? "with" : "without");
1148         applesmc_light = dmi_data->light;
1149         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1150                                         applesmc_light ? "with" : "without");
1151
1152         applesmc_temperature_set =  dmi_data->temperature_set;
1153         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1154                 i++;
1155         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1156         return 1;
1157 }
1158
1159 /* Create accelerometer ressources */
1160 static int applesmc_create_accelerometer(void)
1161 {
1162         struct input_dev *idev;
1163         int ret;
1164
1165         ret = sysfs_create_group(&pdev->dev.kobj,
1166                                         &accelerometer_attributes_group);
1167         if (ret)
1168                 goto out;
1169
1170         applesmc_idev = input_allocate_polled_device();
1171         if (!applesmc_idev) {
1172                 ret = -ENOMEM;
1173                 goto out_sysfs;
1174         }
1175
1176         applesmc_idev->poll = applesmc_idev_poll;
1177         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1178
1179         /* initial calibrate for the input device */
1180         applesmc_calibrate();
1181
1182         /* initialize the input device */
1183         idev = applesmc_idev->input;
1184         idev->name = "applesmc";
1185         idev->id.bustype = BUS_HOST;
1186         idev->dev.parent = &pdev->dev;
1187         idev->evbit[0] = BIT_MASK(EV_ABS);
1188         input_set_abs_params(idev, ABS_X,
1189                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1190         input_set_abs_params(idev, ABS_Y,
1191                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1192
1193         ret = input_register_polled_device(applesmc_idev);
1194         if (ret)
1195                 goto out_idev;
1196
1197         return 0;
1198
1199 out_idev:
1200         input_free_polled_device(applesmc_idev);
1201
1202 out_sysfs:
1203         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1204
1205 out:
1206         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1207         return ret;
1208 }
1209
1210 /* Release all ressources used by the accelerometer */
1211 static void applesmc_release_accelerometer(void)
1212 {
1213         input_unregister_polled_device(applesmc_idev);
1214         input_free_polled_device(applesmc_idev);
1215         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1216 }
1217
1218 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1219 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1220         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1221 /* MacBook2: accelerometer and temperature set 1 */
1222         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1223 /* MacBook: accelerometer and temperature set 2 */
1224         { .accelerometer = 1, .light = 0, .temperature_set = 2 },
1225 /* MacMini: temperature set 3 */
1226         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1227 /* MacPro: temperature set 4 */
1228         { .accelerometer = 0, .light = 0, .temperature_set = 4 },
1229 /* iMac: temperature set 5 */
1230         { .accelerometer = 0, .light = 0, .temperature_set = 5 },
1231 };
1232
1233 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1234  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1235 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1236         { applesmc_dmi_match, "Apple MacBook Pro", {
1237           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1238           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1239                 (void*)&applesmc_dmi_data[0]},
1240         { applesmc_dmi_match, "Apple MacBook", {
1241           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1242           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook2") },
1243                 (void*)&applesmc_dmi_data[1]},
1244         { applesmc_dmi_match, "Apple MacBook", {
1245           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1246           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1247                 (void*)&applesmc_dmi_data[2]},
1248         { applesmc_dmi_match, "Apple Macmini", {
1249           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1250           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1251                 (void*)&applesmc_dmi_data[3]},
1252         { applesmc_dmi_match, "Apple MacPro2", {
1253           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1254           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1255                 (void*)&applesmc_dmi_data[4]},
1256         { applesmc_dmi_match, "Apple iMac", {
1257           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1258           DMI_MATCH(DMI_PRODUCT_NAME,"iMac") },
1259                 (void*)&applesmc_dmi_data[5]},
1260         { .ident = NULL }
1261 };
1262
1263 static int __init applesmc_init(void)
1264 {
1265         int ret;
1266         int count;
1267         int i;
1268
1269         if (!dmi_check_system(applesmc_whitelist)) {
1270                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1271                 ret = -ENODEV;
1272                 goto out;
1273         }
1274
1275         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1276                                                                 "applesmc")) {
1277                 ret = -ENXIO;
1278                 goto out;
1279         }
1280
1281         ret = platform_driver_register(&applesmc_driver);
1282         if (ret)
1283                 goto out_region;
1284
1285         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1286                                                NULL, 0);
1287         if (IS_ERR(pdev)) {
1288                 ret = PTR_ERR(pdev);
1289                 goto out_driver;
1290         }
1291
1292         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1293         if (ret)
1294                 goto out_device;
1295
1296         /* Create key enumeration sysfs files */
1297         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1298         if (ret)
1299                 goto out_name;
1300
1301         /* create fan files */
1302         count = applesmc_get_fan_count();
1303         if (count < 0) {
1304                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1305         } else {
1306                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1307
1308                 switch (count) {
1309                 default:
1310                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1311                                         " but at most 4 fans are supported"
1312                                                 " by the driver.\n");
1313                 case 4:
1314                         ret = sysfs_create_group(&pdev->dev.kobj,
1315                                                  &fan_attribute_groups[3]);
1316                         if (ret)
1317                                 goto out_key_enumeration;
1318                 case 3:
1319                         ret = sysfs_create_group(&pdev->dev.kobj,
1320                                                  &fan_attribute_groups[2]);
1321                         if (ret)
1322                                 goto out_key_enumeration;
1323                 case 2:
1324                         ret = sysfs_create_group(&pdev->dev.kobj,
1325                                                  &fan_attribute_groups[1]);
1326                         if (ret)
1327                                 goto out_key_enumeration;
1328                 case 1:
1329                         ret = sysfs_create_group(&pdev->dev.kobj,
1330                                                  &fan_attribute_groups[0]);
1331                         if (ret)
1332                                 goto out_fan_1;
1333                 case 0:
1334                         ;
1335                 }
1336         }
1337
1338         for (i = 0;
1339              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1340              i++) {
1341                 if (temperature_attributes[i] == NULL) {
1342                         printk(KERN_ERR "applesmc: More temperature sensors "
1343                                 "in temperature_sensors_sets (at least %i)"
1344                                 "than available sysfs files in "
1345                                 "temperature_attributes (%i), please report "
1346                                 "this bug.\n", i, i-1);
1347                         goto out_temperature;
1348                 }
1349                 ret = sysfs_create_file(&pdev->dev.kobj,
1350                                                 temperature_attributes[i]);
1351                 if (ret)
1352                         goto out_temperature;
1353         }
1354
1355         if (applesmc_accelerometer) {
1356                 ret = applesmc_create_accelerometer();
1357                 if (ret)
1358                         goto out_temperature;
1359         }
1360
1361         if (applesmc_light) {
1362                 /* Add light sensor file */
1363                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1364                 if (ret)
1365                         goto out_accelerometer;
1366
1367                 /* Create the workqueue */
1368                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1369                 if (!applesmc_led_wq) {
1370                         ret = -ENOMEM;
1371                         goto out_light_sysfs;
1372                 }
1373
1374                 /* register as a led device */
1375                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1376                 if (ret < 0)
1377                         goto out_light_wq;
1378         }
1379
1380         hwmon_dev = hwmon_device_register(&pdev->dev);
1381         if (IS_ERR(hwmon_dev)) {
1382                 ret = PTR_ERR(hwmon_dev);
1383                 goto out_light_ledclass;
1384         }
1385
1386         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1387
1388         return 0;
1389
1390 out_light_ledclass:
1391         if (applesmc_light)
1392                 led_classdev_unregister(&applesmc_backlight);
1393 out_light_wq:
1394         if (applesmc_light)
1395                 destroy_workqueue(applesmc_led_wq);
1396 out_light_sysfs:
1397         if (applesmc_light)
1398                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1399 out_accelerometer:
1400         if (applesmc_accelerometer)
1401                 applesmc_release_accelerometer();
1402 out_temperature:
1403         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1404         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1405 out_fan_1:
1406         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1407 out_key_enumeration:
1408         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1409 out_name:
1410         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1411 out_device:
1412         platform_device_unregister(pdev);
1413 out_driver:
1414         platform_driver_unregister(&applesmc_driver);
1415 out_region:
1416         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1417 out:
1418         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1419         return ret;
1420 }
1421
1422 static void __exit applesmc_exit(void)
1423 {
1424         hwmon_device_unregister(hwmon_dev);
1425         if (applesmc_light) {
1426                 led_classdev_unregister(&applesmc_backlight);
1427                 destroy_workqueue(applesmc_led_wq);
1428                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1429         }
1430         if (applesmc_accelerometer)
1431                 applesmc_release_accelerometer();
1432         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1433         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1434         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1435         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1436         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1437         platform_device_unregister(pdev);
1438         platform_driver_unregister(&applesmc_driver);
1439         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1440
1441         printk(KERN_INFO "applesmc: driver unloaded.\n");
1442 }
1443
1444 module_init(applesmc_init);
1445 module_exit(applesmc_exit);
1446
1447 MODULE_AUTHOR("Nicolas Boichat");
1448 MODULE_DESCRIPTION("Apple SMC");
1449 MODULE_LICENSE("GPL v2");