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