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