drivers/hwmon/applesmc.c

   1 /*
   2  * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
   3  * sensors, fan control, keyboard backlight control) used in Intel-based Apple
   4  * computers.
   5  *
   6  * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
   7  *
   8  * Based on hdaps.c driver:
   9  * Copyright (C) 2005 Robert Love <rml@novell.com>
  10  * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
  11  *
  12  * Fan control based on smcFanControl:
  13  * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU General Public License v2 as published by the
  17  * Free Software Foundation.
  18  *
  19  * This program is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  22  * more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along with
  25  * this program; if not, write to the Free Software Foundation, Inc.,
  26  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  27  */
  28
  29 #include <linux/delay.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/input-polldev.h>
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/timer.h>
  35 #include <linux/dmi.h>
  36 #include <linux/mutex.h>
  37 #include <linux/hwmon-sysfs.h>
  38 #include <asm/io.h>
  39 #include <linux/leds.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/workqueue.h>
  42
  43 /* data port used by Apple SMC */
  44 #define APPLESMC_DATA_PORT      0x300
  45 /* command/status port used by Apple SMC */
  46 #define APPLESMC_CMD_PORT       0x304
  47
  48 #define APPLESMC_NR_PORTS       32 /* 0x300-0x31f */
  49
  50 #define APPLESMC_MAX_DATA_LENGTH 32
  51
  52 #define APPLESMC_STATUS_MASK    0x0f
  53 #define APPLESMC_READ_CMD       0x10
  54 #define APPLESMC_WRITE_CMD      0x11
  55 #define APPLESMC_GET_KEY_BY_INDEX_CMD   0x12
  56 #define APPLESMC_GET_KEY_TYPE_CMD       0x13
  57
  58 #define KEY_COUNT_KEY           "#KEY" /* r-o ui32 */
  59
  60 #define LIGHT_SENSOR_LEFT_KEY   "ALV0" /* r-o {alv (6-10 bytes) */
  61 #define LIGHT_SENSOR_RIGHT_KEY  "ALV1" /* r-o {alv (6-10 bytes) */
  62 #define BACKLIGHT_KEY           "LKSB" /* w-o {lkb (2 bytes) */
  63
  64 #define CLAMSHELL_KEY           "MSLD" /* r-o ui8 (unused) */
  65
  66 #define MOTION_SENSOR_X_KEY     "MO_X" /* r-o sp78 (2 bytes) */
  67 #define MOTION_SENSOR_Y_KEY     "MO_Y" /* r-o sp78 (2 bytes) */
  68 #define MOTION_SENSOR_Z_KEY     "MO_Z" /* r-o sp78 (2 bytes) */
  69 #define MOTION_SENSOR_KEY       "MOCN" /* r/w ui16 */
  70
  71 #define FANS_COUNT              "FNum" /* r-o ui8 */
  72 #define FANS_MANUAL             "FS! " /* r-w ui16 */
  73 #define FAN_ACTUAL_SPEED        "F0Ac" /* r-o fpe2 (2 bytes) */
  74 #define FAN_MIN_SPEED           "F0Mn" /* r-o fpe2 (2 bytes) */
  75 #define FAN_MAX_SPEED           "F0Mx" /* r-o fpe2 (2 bytes) */
  76 #define FAN_SAFE_SPEED          "F0Sf" /* r-o fpe2 (2 bytes) */
  77 #define FAN_TARGET_SPEED        "F0Tg" /* r-w fpe2 (2 bytes) */
  78 #define FAN_POSITION            "F0ID" /* r-o char[16] */
  79
  80 /*
  81  * Temperature sensors keys (sp78 - 2 bytes).
  82  */
  83 static const char* temperature_sensors_sets[][36] = {
  84 /* Set 0: Macbook Pro */
  85         { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
  86           "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
  87 /* Set 1: Macbook2 set */
  88         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "TTF0", "Th0H",
  89           "Th0S", "Th1H", NULL },
  90 /* Set 2: Macbook set */
  91         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S",
  92           "Th1H", "Ts0P", NULL },
  93 /* Set 3: Macmini set */
  94         { "TC0D", "TC0P", NULL },
  95 /* Set 4: Mac Pro (2 x Quad-Core) */
  96         { "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
  97           "TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "THTG", "TH0P",
  98           "TH1P", "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S",
  99           "TM1P", "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P",
 100           "TM9S", "TN0H", "TS0C", NULL },
 101 /* Set 5: iMac */
 102         { "TC0D", "TA0P", "TG0P", "TG0D", "TG0H", "TH0P", "Tm0P", "TO0P",
 103           "Tp0C", NULL },
 104 /* Set 6: Macbook3 set */
 105         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TTF0", "TW0P", "Th0H",
 106           "Th0S", "Th1H", NULL },
 107 /* Set 7: Macbook Air */
 108         { "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TC0P", "TCFP",
 109           "TTF0", "TW0P", "Th0H", "Tp0P", "TpFP", "Ts0P", "Ts0S", NULL },
 110 /* Set 8: Macbook Pro 4,1 (Penryn) */
 111         { "TB0T", "TC0D", "TC0P", "TG0D", "TG0H", "TTF0", "TW0P", "Th0H",
 112           "Th1H", "Th2H", "Tm0P", "Ts0P", NULL },
 113 };
 114
 115 /* List of keys used to read/write fan speeds */
 116 static const char* fan_speed_keys[] = {
 117         FAN_ACTUAL_SPEED,
 118         FAN_MIN_SPEED,
 119         FAN_MAX_SPEED,
 120         FAN_SAFE_SPEED,
 121         FAN_TARGET_SPEED
 122 };
 123
 124 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
 125 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
 126
 127 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
 128 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 129 #define APPLESMC_INPUT_FLAT     4
 130
 131 #define SENSOR_X 0
 132 #define SENSOR_Y 1
 133 #define SENSOR_Z 2
 134
 135 /* Structure to be passed to DMI_MATCH function */
 136 struct dmi_match_data {
 137 /* Indicates whether this computer has an accelerometer. */
 138         int accelerometer;
 139 /* Indicates whether this computer has light sensors and keyboard backlight. */
 140         int light;
 141 /* Indicates which temperature sensors set to use. */
 142         int temperature_set;
 143 };
 144
 145 static const int debug;
 146 static struct platform_device *pdev;
 147 static s16 rest_x;
 148 static s16 rest_y;
 149 static struct device *hwmon_dev;
 150 static struct input_polled_dev *applesmc_idev;
 151
 152 /* Indicates whether this computer has an accelerometer. */
 153 static unsigned int applesmc_accelerometer;
 154
 155 /* Indicates whether this computer has light sensors and keyboard backlight. */
 156 static unsigned int applesmc_light;
 157
 158 /* Indicates which temperature sensors set to use. */
 159 static unsigned int applesmc_temperature_set;
 160
 161 static DEFINE_MUTEX(applesmc_lock);
 162
 163 /*
 164  * Last index written to key_at_index sysfs file, and value to use for all other
 165  * key_at_index_* sysfs files.
 166  */
 167 static unsigned int key_at_index;
 168
 169 static struct workqueue_struct *applesmc_led_wq;
 170
 171 /*
 172  * __wait_status - Wait up to 10ms for the status port to get a certain value
 173  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 174  * hold applesmc_lock.
 175  */
 176 static int __wait_status(u8 val)
 177 {
 178         unsigned int i;
 179
 180         val = val & APPLESMC_STATUS_MASK;
 181
 182         for (i = 0; i < 1000; i++) {
 183                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
 184                         if (debug)
 185                                 printk(KERN_DEBUG
 186                                                 "Waited %d us for status %x\n",
 187                                                 i*10, val);
 188                         return 0;
 189                 }
 190                 udelay(10);
 191         }
 192
 193         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
 194                                                 val, inb(APPLESMC_CMD_PORT));
 195
 196         return -EIO;
 197 }
 198
 199 /*
 200  * special treatment of command port - on newer macbooks, it seems necessary
 201  * to resend the command byte before polling the status again. Callers must
 202  * hold applesmc_lock.
 203  */
 204 static int send_command(u8 cmd)
 205 {
 206         int i;
 207         for (i = 0; i < 1000; i++) {
 208                 outb(cmd, APPLESMC_CMD_PORT);
 209                 udelay(5);
 210                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c)
 211                         return 0;
 212                 udelay(5);
 213         }
 214         printk(KERN_WARNING "applesmc: command failed: %x -> %x\n",
 215                 cmd, inb(APPLESMC_CMD_PORT));
 216         return -EIO;
 217 }
 218
 219 /*
 220  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 221  * Returns zero on success or a negative error on failure. Callers must
 222  * hold applesmc_lock.
 223  */
 224 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
 225 {
 226         int i;
 227
 228         if (len > APPLESMC_MAX_DATA_LENGTH) {
 229                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
 230                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 231                 return -EINVAL;
 232         }
 233
 234         if (send_command(APPLESMC_READ_CMD))
 235                 return -EIO;
 236
 237         for (i = 0; i < 4; i++) {
 238                 outb(key[i], APPLESMC_DATA_PORT);
 239                 if (__wait_status(0x04))
 240                         return -EIO;
 241         }
 242         if (debug)
 243                 printk(KERN_DEBUG "<%s", key);
 244
 245         outb(len, APPLESMC_DATA_PORT);
 246         if (debug)
 247                 printk(KERN_DEBUG ">%x", len);
 248
 249         for (i = 0; i < len; i++) {
 250                 if (__wait_status(0x05))
 251                         return -EIO;
 252                 buffer[i] = inb(APPLESMC_DATA_PORT);
 253                 if (debug)
 254                         printk(KERN_DEBUG "<%x", buffer[i]);
 255         }
 256         if (debug)
 257                 printk(KERN_DEBUG "\n");
 258
 259         return 0;
 260 }
 261
 262 /*
 263  * applesmc_write_key - writes len bytes from buffer to a given key.
 264  * Returns zero on success or a negative error on failure. Callers must
 265  * hold applesmc_lock.
 266  */
 267 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
 268 {
 269         int i;
 270
 271         if (len > APPLESMC_MAX_DATA_LENGTH) {
 272                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
 273                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 274                 return -EINVAL;
 275         }
 276
 277         if (send_command(APPLESMC_WRITE_CMD))
 278                 return -EIO;
 279
 280         for (i = 0; i < 4; i++) {
 281                 outb(key[i], APPLESMC_DATA_PORT);
 282                 if (__wait_status(0x04))
 283                         return -EIO;
 284         }
 285
 286         outb(len, APPLESMC_DATA_PORT);
 287
 288         for (i = 0; i < len; i++) {
 289                 if (__wait_status(0x04))
 290                         return -EIO;
 291                 outb(buffer[i], APPLESMC_DATA_PORT);
 292         }
 293
 294         return 0;
 295 }
 296
 297 /*
 298  * applesmc_get_key_at_index - get key at index, and put the result in key
 299  * (char[6]). Returns zero on success or a negative error on failure. Callers
 300  * must hold applesmc_lock.
 301  */
 302 static int applesmc_get_key_at_index(int index, char* key)
 303 {
 304         int i;
 305         u8 readkey[4];
 306         readkey[0] = index >> 24;
 307         readkey[1] = index >> 16;
 308         readkey[2] = index >> 8;
 309         readkey[3] = index;
 310
 311         if (send_command(APPLESMC_GET_KEY_BY_INDEX_CMD))
 312                 return -EIO;
 313
 314         for (i = 0; i < 4; i++) {
 315                 outb(readkey[i], APPLESMC_DATA_PORT);
 316                 if (__wait_status(0x04))
 317                         return -EIO;
 318         }
 319
 320         outb(4, APPLESMC_DATA_PORT);
 321
 322         for (i = 0; i < 4; i++) {
 323                 if (__wait_status(0x05))
 324                         return -EIO;
 325                 key[i] = inb(APPLESMC_DATA_PORT);
 326         }
 327         key[4] = 0;
 328
 329         return 0;
 330 }
 331
 332 /*
 333  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 334  * Returns zero on success or a negative error on failure. Callers must
 335  * hold applesmc_lock.
 336  */
 337 static int applesmc_get_key_type(char* key, char* type)
 338 {
 339         int i;
 340
 341         if (send_command(APPLESMC_GET_KEY_TYPE_CMD))
 342                 return -EIO;
 343
 344         for (i = 0; i < 4; i++) {
 345                 outb(key[i], APPLESMC_DATA_PORT);
 346                 if (__wait_status(0x04))
 347                         return -EIO;
 348         }
 349
 350         outb(6, APPLESMC_DATA_PORT);
 351
 352         for (i = 0; i < 6; i++) {
 353                 if (__wait_status(0x05))
 354                         return -EIO;
 355                 type[i] = inb(APPLESMC_DATA_PORT);
 356         }
 357         type[5] = 0;
 358
 359         return 0;
 360 }
 361
 362 /*
 363  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 364  * hold applesmc_lock.
 365  */
 366 static int applesmc_read_motion_sensor(int index, s16* value)
 367 {
 368         u8 buffer[2];
 369         int ret;
 370
 371         switch (index) {
 372         case SENSOR_X:
 373                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
 374                 break;
 375         case SENSOR_Y:
 376                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
 377                 break;
 378         case SENSOR_Z:
 379                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 380                 break;
 381         default:
 382                 ret = -EINVAL;
 383         }
 384
 385         *value = ((s16)buffer[0] << 8) | buffer[1];
 386
 387         return ret;
 388 }
 389
 390 /*
 391  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 392  * and negative error code on failure.  Can sleep.
 393  */
 394 static int applesmc_device_init(void)
 395 {
 396         int total, ret = -ENXIO;
 397         u8 buffer[2];
 398
 399         if (!applesmc_accelerometer)
 400                 return 0;
 401
 402         mutex_lock(&applesmc_lock);
 403
 404         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 405                 if (debug)
 406                         printk(KERN_DEBUG "applesmc try %d\n", total);
 407                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 408                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
 409                         if (total == INIT_TIMEOUT_MSECS) {
 410                                 printk(KERN_DEBUG "applesmc: device has"
 411                                                 " already been initialized"
 412                                                 " (0x%02x, 0x%02x).\n",
 413                                                 buffer[0], buffer[1]);
 414                         } else {
 415                                 printk(KERN_DEBUG "applesmc: device"
 416                                                 " successfully initialized"
 417                                                 " (0x%02x, 0x%02x).\n",
 418                                                 buffer[0], buffer[1]);
 419                         }
 420                         ret = 0;
 421                         goto out;
 422                 }
 423                 buffer[0] = 0xe0;
 424                 buffer[1] = 0x00;
 425                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 426                 msleep(INIT_WAIT_MSECS);
 427         }
 428
 429         printk(KERN_WARNING "applesmc: failed to init the device\n");
 430
 431 out:
 432         mutex_unlock(&applesmc_lock);
 433         return ret;
 434 }
 435
 436 /*
 437  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 438  * applesmc_lock.
 439  */
 440 static int applesmc_get_fan_count(void)
 441 {
 442         int ret;
 443         u8 buffer[1];
 444
 445         mutex_lock(&applesmc_lock);
 446
 447         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
 448
 449         mutex_unlock(&applesmc_lock);
 450         if (ret)
 451                 return ret;
 452         else
 453                 return buffer[0];
 454 }
 455
 456 /* Device model stuff */
 457 static int applesmc_probe(struct platform_device *dev)
 458 {
 459         int ret;
 460
 461         ret = applesmc_device_init();
 462         if (ret)
 463                 return ret;
 464
 465         printk(KERN_INFO "applesmc: device successfully initialized.\n");
 466         return 0;
 467 }
 468
 469 static int applesmc_resume(struct platform_device *dev)
 470 {
 471         return applesmc_device_init();
 472 }
 473
 474 static struct platform_driver applesmc_driver = {
 475         .probe = applesmc_probe,
 476         .resume = applesmc_resume,
 477         .driver = {
 478                 .name = "applesmc",
 479                 .owner = THIS_MODULE,
 480         },
 481 };
 482
 483 /*
 484  * applesmc_calibrate - Set our "resting" values.  Callers must
 485  * hold applesmc_lock.
 486  */
 487 static void applesmc_calibrate(void)
 488 {
 489         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
 490         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
 491         rest_x = -rest_x;
 492 }
 493
 494 static void applesmc_idev_poll(struct input_polled_dev *dev)
 495 {
 496         struct input_dev *idev = dev->input;
 497         s16 x, y;
 498
 499         mutex_lock(&applesmc_lock);
 500
 501         if (applesmc_read_motion_sensor(SENSOR_X, &x))
 502                 goto out;
 503         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
 504                 goto out;
 505
 506         x = -x;
 507         input_report_abs(idev, ABS_X, x - rest_x);
 508         input_report_abs(idev, ABS_Y, y - rest_y);
 509         input_sync(idev);
 510
 511 out:
 512         mutex_unlock(&applesmc_lock);
 513 }
 514
 515 /* Sysfs Files */
 516
 517 static ssize_t applesmc_name_show(struct device *dev,
 518                                    struct device_attribute *attr, char *buf)
 519 {
 520         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 521 }
 522
 523 static ssize_t applesmc_position_show(struct device *dev,
 524                                    struct device_attribute *attr, char *buf)
 525 {
 526         int ret;
 527         s16 x, y, z;
 528
 529         mutex_lock(&applesmc_lock);
 530
 531         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
 532         if (ret)
 533                 goto out;
 534         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
 535         if (ret)
 536                 goto out;
 537         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
 538         if (ret)
 539                 goto out;
 540
 541 out:
 542         mutex_unlock(&applesmc_lock);
 543         if (ret)
 544                 return ret;
 545         else
 546                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 547 }
 548
 549 static ssize_t applesmc_light_show(struct device *dev,
 550                                 struct device_attribute *attr, char *sysfsbuf)
 551 {
 552         static int data_length;
 553         int ret;
 554         u8 left = 0, right = 0;
 555         u8 buffer[10], query[6];
 556
 557         mutex_lock(&applesmc_lock);
 558
 559         if (!data_length) {
 560                 ret = applesmc_get_key_type(LIGHT_SENSOR_LEFT_KEY, query);
 561                 if (ret)
 562                         goto out;
 563                 data_length = clamp_val(query[0], 0, 10);
 564                 printk(KERN_INFO "applesmc: light sensor data length set to "
 565                         "%d\n", data_length);
 566         }
 567
 568         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
 569         left = buffer[2];
 570         if (ret)
 571                 goto out;
 572         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
 573         right = buffer[2];
 574
 575 out:
 576         mutex_unlock(&applesmc_lock);
 577         if (ret)
 578                 return ret;
 579         else
 580                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 581 }
 582
 583 /* Displays degree Celsius * 1000 */
 584 static ssize_t applesmc_show_temperature(struct device *dev,
 585                         struct device_attribute *devattr, char *sysfsbuf)
 586 {
 587         int ret;
 588         u8 buffer[2];
 589         unsigned int temp;
 590         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 591         const char* key =
 592                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
 593
 594         mutex_lock(&applesmc_lock);
 595
 596         ret = applesmc_read_key(key, buffer, 2);
 597         temp = buffer[0]*1000;
 598         temp += (buffer[1] >> 6) * 250;
 599
 600         mutex_unlock(&applesmc_lock);
 601
 602         if (ret)
 603                 return ret;
 604         else
 605                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
 606 }
 607
 608 static ssize_t applesmc_show_fan_speed(struct device *dev,
 609                                 struct device_attribute *attr, char *sysfsbuf)
 610 {
 611         int ret;
 612         unsigned int speed = 0;
 613         char newkey[5];
 614         u8 buffer[2];
 615         struct sensor_device_attribute_2 *sensor_attr =
 616                                                 to_sensor_dev_attr_2(attr);
 617
 618         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 619         newkey[1] = '0' + sensor_attr->index;
 620         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 621         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 622         newkey[4] = 0;
 623
 624         mutex_lock(&applesmc_lock);
 625
 626         ret = applesmc_read_key(newkey, buffer, 2);
 627         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 628
 629         mutex_unlock(&applesmc_lock);
 630         if (ret)
 631                 return ret;
 632         else
 633                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 634 }
 635
 636 static ssize_t applesmc_store_fan_speed(struct device *dev,
 637                                         struct device_attribute *attr,
 638                                         const char *sysfsbuf, size_t count)
 639 {
 640         int ret;
 641         u32 speed;
 642         char newkey[5];
 643         u8 buffer[2];
 644         struct sensor_device_attribute_2 *sensor_attr =
 645                                                 to_sensor_dev_attr_2(attr);
 646
 647         speed = simple_strtoul(sysfsbuf, NULL, 10);
 648
 649         if (speed > 0x4000) /* Bigger than a 14-bit value */
 650                 return -EINVAL;
 651
 652         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 653         newkey[1] = '0' + sensor_attr->index;
 654         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 655         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 656         newkey[4] = 0;
 657
 658         mutex_lock(&applesmc_lock);
 659
 660         buffer[0] = (speed >> 6) & 0xff;
 661         buffer[1] = (speed << 2) & 0xff;
 662         ret = applesmc_write_key(newkey, buffer, 2);
 663
 664         mutex_unlock(&applesmc_lock);
 665         if (ret)
 666                 return ret;
 667         else
 668                 return count;
 669 }
 670
 671 static ssize_t applesmc_show_fan_manual(struct device *dev,
 672                         struct device_attribute *devattr, char *sysfsbuf)
 673 {
 674         int ret;
 675         u16 manual = 0;
 676         u8 buffer[2];
 677         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 678
 679         mutex_lock(&applesmc_lock);
 680
 681         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 682         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
 683
 684         mutex_unlock(&applesmc_lock);
 685         if (ret)
 686                 return ret;
 687         else
 688                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 689 }
 690
 691 static ssize_t applesmc_store_fan_manual(struct device *dev,
 692                                          struct device_attribute *devattr,
 693                                          const char *sysfsbuf, size_t count)
 694 {
 695         int ret;
 696         u8 buffer[2];
 697         u32 input;
 698         u16 val;
 699         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 700
 701         input = simple_strtoul(sysfsbuf, NULL, 10);
 702
 703         mutex_lock(&applesmc_lock);
 704
 705         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 706         val = (buffer[0] << 8 | buffer[1]);
 707         if (ret)
 708                 goto out;
 709
 710         if (input)
 711                 val = val | (0x01 << attr->index);
 712         else
 713                 val = val & ~(0x01 << attr->index);
 714
 715         buffer[0] = (val >> 8) & 0xFF;
 716         buffer[1] = val & 0xFF;
 717
 718         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 719
 720 out:
 721         mutex_unlock(&applesmc_lock);
 722         if (ret)
 723                 return ret;
 724         else
 725                 return count;
 726 }
 727
 728 static ssize_t applesmc_show_fan_position(struct device *dev,
 729                                 struct device_attribute *attr, char *sysfsbuf)
 730 {
 731         int ret;
 732         char newkey[5];
 733         u8 buffer[17];
 734         struct sensor_device_attribute_2 *sensor_attr =
 735                                                 to_sensor_dev_attr_2(attr);
 736
 737         newkey[0] = FAN_POSITION[0];
 738         newkey[1] = '0' + sensor_attr->index;
 739         newkey[2] = FAN_POSITION[2];
 740         newkey[3] = FAN_POSITION[3];
 741         newkey[4] = 0;
 742
 743         mutex_lock(&applesmc_lock);
 744
 745         ret = applesmc_read_key(newkey, buffer, 16);
 746         buffer[16] = 0;
 747
 748         mutex_unlock(&applesmc_lock);
 749         if (ret)
 750                 return ret;
 751         else
 752                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 753 }
 754
 755 static ssize_t applesmc_calibrate_show(struct device *dev,
 756                                 struct device_attribute *attr, char *sysfsbuf)
 757 {
 758         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 759 }
 760
 761 static ssize_t applesmc_calibrate_store(struct device *dev,
 762         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 763 {
 764         mutex_lock(&applesmc_lock);
 765         applesmc_calibrate();
 766         mutex_unlock(&applesmc_lock);
 767
 768         return count;
 769 }
 770
 771 /* Store the next backlight value to be written by the work */
 772 static unsigned int backlight_value;
 773
 774 static void applesmc_backlight_set(struct work_struct *work)
 775 {
 776         u8 buffer[2];
 777
 778         mutex_lock(&applesmc_lock);
 779         buffer[0] = backlight_value;
 780         buffer[1] = 0x00;
 781         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
 782         mutex_unlock(&applesmc_lock);
 783 }
 784 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 785
 786 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 787                                                 enum led_brightness value)
 788 {
 789         int ret;
 790
 791         backlight_value = value;
 792         ret = queue_work(applesmc_led_wq, &backlight_work);
 793
 794         if (debug && (!ret))
 795                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
 796 }
 797
 798 static ssize_t applesmc_key_count_show(struct device *dev,
 799                                 struct device_attribute *attr, char *sysfsbuf)
 800 {
 801         int ret;
 802         u8 buffer[4];
 803         u32 count;
 804
 805         mutex_lock(&applesmc_lock);
 806
 807         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 808         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 809                                                 ((u32)buffer[2]<<8) + buffer[3];
 810
 811         mutex_unlock(&applesmc_lock);
 812         if (ret)
 813                 return ret;
 814         else
 815                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 816 }
 817
 818 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 819                                 struct device_attribute *attr, char *sysfsbuf)
 820 {
 821         char key[5];
 822         char info[6];
 823         int ret;
 824
 825         mutex_lock(&applesmc_lock);
 826
 827         ret = applesmc_get_key_at_index(key_at_index, key);
 828
 829         if (ret || !key[0]) {
 830                 mutex_unlock(&applesmc_lock);
 831
 832                 return -EINVAL;
 833         }
 834
 835         ret = applesmc_get_key_type(key, info);
 836
 837         if (ret) {
 838                 mutex_unlock(&applesmc_lock);
 839
 840                 return ret;
 841         }
 842
 843         /*
 844          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
 845          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
 846          */
 847         ret = applesmc_read_key(key, sysfsbuf, info[0]);
 848
 849         mutex_unlock(&applesmc_lock);
 850
 851         if (!ret) {
 852                 return info[0];
 853         } else {
 854                 return ret;
 855         }
 856 }
 857
 858 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 859                                 struct device_attribute *attr, char *sysfsbuf)
 860 {
 861         char key[5];
 862         char info[6];
 863         int ret;
 864
 865         mutex_lock(&applesmc_lock);
 866
 867         ret = applesmc_get_key_at_index(key_at_index, key);
 868
 869         if (ret || !key[0]) {
 870                 mutex_unlock(&applesmc_lock);
 871
 872                 return -EINVAL;
 873         }
 874
 875         ret = applesmc_get_key_type(key, info);
 876
 877         mutex_unlock(&applesmc_lock);
 878
 879         if (!ret)
 880                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
 881         else
 882                 return ret;
 883 }
 884
 885 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 886                                 struct device_attribute *attr, char *sysfsbuf)
 887 {
 888         char key[5];
 889         char info[6];
 890         int ret;
 891
 892         mutex_lock(&applesmc_lock);
 893
 894         ret = applesmc_get_key_at_index(key_at_index, key);
 895
 896         if (ret || !key[0]) {
 897                 mutex_unlock(&applesmc_lock);
 898
 899                 return -EINVAL;
 900         }
 901
 902         ret = applesmc_get_key_type(key, info);
 903
 904         mutex_unlock(&applesmc_lock);
 905
 906         if (!ret)
 907                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
 908         else
 909                 return ret;
 910 }
 911
 912 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 913                                 struct device_attribute *attr, char *sysfsbuf)
 914 {
 915         char key[5];
 916         int ret;
 917
 918         mutex_lock(&applesmc_lock);
 919
 920         ret = applesmc_get_key_at_index(key_at_index, key);
 921
 922         mutex_unlock(&applesmc_lock);
 923
 924         if (!ret && key[0])
 925                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 926         else
 927                 return -EINVAL;
 928 }
 929
 930 static ssize_t applesmc_key_at_index_show(struct device *dev,
 931                                 struct device_attribute *attr, char *sysfsbuf)
 932 {
 933         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
 934 }
 935
 936 static ssize_t applesmc_key_at_index_store(struct device *dev,
 937         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 938 {
 939         mutex_lock(&applesmc_lock);
 940
 941         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
 942
 943         mutex_unlock(&applesmc_lock);
 944
 945         return count;
 946 }
 947
 948 static struct led_classdev applesmc_backlight = {
 949         .name                   = "smc::kbd_backlight",
 950         .default_trigger        = "nand-disk",
 951         .brightness_set         = applesmc_brightness_set,
 952 };
 953
 954 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
 955
 956 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
 957 static DEVICE_ATTR(calibrate, 0644,
 958                         applesmc_calibrate_show, applesmc_calibrate_store);
 959
 960 static struct attribute *accelerometer_attributes[] = {
 961         &dev_attr_position.attr,
 962         &dev_attr_calibrate.attr,
 963         NULL
 964 };
 965
 966 static const struct attribute_group accelerometer_attributes_group =
 967         { .attrs = accelerometer_attributes };
 968
 969 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
 970
 971 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
 972 static DEVICE_ATTR(key_at_index, 0644,
 973                 applesmc_key_at_index_show, applesmc_key_at_index_store);
 974 static DEVICE_ATTR(key_at_index_name, 0444,
 975                                         applesmc_key_at_index_name_show, NULL);
 976 static DEVICE_ATTR(key_at_index_type, 0444,
 977                                         applesmc_key_at_index_type_show, NULL);
 978 static DEVICE_ATTR(key_at_index_data_length, 0444,
 979                                 applesmc_key_at_index_data_length_show, NULL);
 980 static DEVICE_ATTR(key_at_index_data, 0444,
 981                                 applesmc_key_at_index_read_show, NULL);
 982
 983 static struct attribute *key_enumeration_attributes[] = {
 984         &dev_attr_key_count.attr,
 985         &dev_attr_key_at_index.attr,
 986         &dev_attr_key_at_index_name.attr,
 987         &dev_attr_key_at_index_type.attr,
 988         &dev_attr_key_at_index_data_length.attr,
 989         &dev_attr_key_at_index_data.attr,
 990         NULL
 991 };
 992
 993 static const struct attribute_group key_enumeration_group =
 994         { .attrs = key_enumeration_attributes };
 995
 996 /*
 997  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
 998  *  - show actual speed
 999  *  - show/store minimum speed
1000  *  - show maximum speed
1001  *  - show safe speed
1002  *  - show/store target speed
1003  *  - show/store manual mode
1004  */
1005 #define sysfs_fan_speeds_offset(offset) \
1006 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
1007                         applesmc_show_fan_speed, NULL, 0, offset-1); \
1008 \
1009 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
1010         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
1011 \
1012 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
1013                         applesmc_show_fan_speed, NULL, 2, offset-1); \
1014 \
1015 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
1016                         applesmc_show_fan_speed, NULL, 3, offset-1); \
1017 \
1018 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
1019         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
1020 \
1021 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
1022         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
1023 \
1024 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
1025         applesmc_show_fan_position, NULL, offset-1); \
1026 \
1027 static struct attribute *fan##offset##_attributes[] = { \
1028         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
1029         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
1030         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
1031         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
1032         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
1033         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
1034         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
1035         NULL \
1036 };
1037
1038 /*
1039  * Create the needed functions for each fan using the macro defined above
1040  * (4 fans are supported)
1041  */
1042 sysfs_fan_speeds_offset(1);
1043 sysfs_fan_speeds_offset(2);
1044 sysfs_fan_speeds_offset(3);
1045 sysfs_fan_speeds_offset(4);
1046
1047 static const struct attribute_group fan_attribute_groups[] = {
1048         { .attrs = fan1_attributes },
1049         { .attrs = fan2_attributes },
1050         { .attrs = fan3_attributes },
1051         { .attrs = fan4_attributes },
1052 };
1053
1054 /*
1055  * Temperature sensors sysfs entries.
1056  */
1057 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1058                                         applesmc_show_temperature, NULL, 0);
1059 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1060                                         applesmc_show_temperature, NULL, 1);
1061 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1062                                         applesmc_show_temperature, NULL, 2);
1063 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1064                                         applesmc_show_temperature, NULL, 3);
1065 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1066                                         applesmc_show_temperature, NULL, 4);
1067 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1068                                         applesmc_show_temperature, NULL, 5);
1069 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1070                                         applesmc_show_temperature, NULL, 6);
1071 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1072                                         applesmc_show_temperature, NULL, 7);
1073 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1074                                         applesmc_show_temperature, NULL, 8);
1075 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1076                                         applesmc_show_temperature, NULL, 9);
1077 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1078                                         applesmc_show_temperature, NULL, 10);
1079 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1080                                         applesmc_show_temperature, NULL, 11);
1081 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1082                                         applesmc_show_temperature, NULL, 12);
1083 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1084                                         applesmc_show_temperature, NULL, 13);
1085 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1086                                         applesmc_show_temperature, NULL, 14);
1087 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1088                                         applesmc_show_temperature, NULL, 15);
1089 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1090                                         applesmc_show_temperature, NULL, 16);
1091 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1092                                         applesmc_show_temperature, NULL, 17);
1093 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1094                                         applesmc_show_temperature, NULL, 18);
1095 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1096                                         applesmc_show_temperature, NULL, 19);
1097 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1098                                         applesmc_show_temperature, NULL, 20);
1099 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1100                                         applesmc_show_temperature, NULL, 21);
1101 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1102                                         applesmc_show_temperature, NULL, 22);
1103 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1104                                         applesmc_show_temperature, NULL, 23);
1105 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1106                                         applesmc_show_temperature, NULL, 24);
1107 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1108                                         applesmc_show_temperature, NULL, 25);
1109 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1110                                         applesmc_show_temperature, NULL, 26);
1111 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1112                                         applesmc_show_temperature, NULL, 27);
1113 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1114                                         applesmc_show_temperature, NULL, 28);
1115 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1116                                         applesmc_show_temperature, NULL, 29);
1117 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1118                                         applesmc_show_temperature, NULL, 30);
1119 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1120                                         applesmc_show_temperature, NULL, 31);
1121 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1122                                         applesmc_show_temperature, NULL, 32);
1123 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1124                                         applesmc_show_temperature, NULL, 33);
1125 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1126                                         applesmc_show_temperature, NULL, 34);
1127
1128 static struct attribute *temperature_attributes[] = {
1129         &sensor_dev_attr_temp1_input.dev_attr.attr,
1130         &sensor_dev_attr_temp2_input.dev_attr.attr,
1131         &sensor_dev_attr_temp3_input.dev_attr.attr,
1132         &sensor_dev_attr_temp4_input.dev_attr.attr,
1133         &sensor_dev_attr_temp5_input.dev_attr.attr,
1134         &sensor_dev_attr_temp6_input.dev_attr.attr,
1135         &sensor_dev_attr_temp7_input.dev_attr.attr,
1136         &sensor_dev_attr_temp8_input.dev_attr.attr,
1137         &sensor_dev_attr_temp9_input.dev_attr.attr,
1138         &sensor_dev_attr_temp10_input.dev_attr.attr,
1139         &sensor_dev_attr_temp11_input.dev_attr.attr,
1140         &sensor_dev_attr_temp12_input.dev_attr.attr,
1141         &sensor_dev_attr_temp13_input.dev_attr.attr,
1142         &sensor_dev_attr_temp14_input.dev_attr.attr,
1143         &sensor_dev_attr_temp15_input.dev_attr.attr,
1144         &sensor_dev_attr_temp16_input.dev_attr.attr,
1145         &sensor_dev_attr_temp17_input.dev_attr.attr,
1146         &sensor_dev_attr_temp18_input.dev_attr.attr,
1147         &sensor_dev_attr_temp19_input.dev_attr.attr,
1148         &sensor_dev_attr_temp20_input.dev_attr.attr,
1149         &sensor_dev_attr_temp21_input.dev_attr.attr,
1150         &sensor_dev_attr_temp22_input.dev_attr.attr,
1151         &sensor_dev_attr_temp23_input.dev_attr.attr,
1152         &sensor_dev_attr_temp24_input.dev_attr.attr,
1153         &sensor_dev_attr_temp25_input.dev_attr.attr,
1154         &sensor_dev_attr_temp26_input.dev_attr.attr,
1155         &sensor_dev_attr_temp27_input.dev_attr.attr,
1156         &sensor_dev_attr_temp28_input.dev_attr.attr,
1157         &sensor_dev_attr_temp29_input.dev_attr.attr,
1158         &sensor_dev_attr_temp30_input.dev_attr.attr,
1159         &sensor_dev_attr_temp31_input.dev_attr.attr,
1160         &sensor_dev_attr_temp32_input.dev_attr.attr,
1161         &sensor_dev_attr_temp33_input.dev_attr.attr,
1162         &sensor_dev_attr_temp34_input.dev_attr.attr,
1163         &sensor_dev_attr_temp35_input.dev_attr.attr,
1164         NULL
1165 };
1166
1167 static const struct attribute_group temperature_attributes_group =
1168         { .attrs = temperature_attributes };
1169
1170 /* Module stuff */
1171
1172 /*
1173  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1174  */
1175 static int applesmc_dmi_match(const struct dmi_system_id *id)
1176 {
1177         int i = 0;
1178         struct dmi_match_data* dmi_data = id->driver_data;
1179         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1180         applesmc_accelerometer = dmi_data->accelerometer;
1181         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1182                                 applesmc_accelerometer ? "with" : "without");
1183         applesmc_light = dmi_data->light;
1184         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1185                                         applesmc_light ? "with" : "without");
1186
1187         applesmc_temperature_set =  dmi_data->temperature_set;
1188         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1189                 i++;
1190         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1191         return 1;
1192 }
1193
1194 /* Create accelerometer ressources */
1195 static int applesmc_create_accelerometer(void)
1196 {
1197         struct input_dev *idev;
1198         int ret;
1199
1200         ret = sysfs_create_group(&pdev->dev.kobj,
1201                                         &accelerometer_attributes_group);
1202         if (ret)
1203                 goto out;
1204
1205         applesmc_idev = input_allocate_polled_device();
1206         if (!applesmc_idev) {
1207                 ret = -ENOMEM;
1208                 goto out_sysfs;
1209         }
1210
1211         applesmc_idev->poll = applesmc_idev_poll;
1212         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1213
1214         /* initial calibrate for the input device */
1215         applesmc_calibrate();
1216
1217         /* initialize the input device */
1218         idev = applesmc_idev->input;
1219         idev->name = "applesmc";
1220         idev->id.bustype = BUS_HOST;
1221         idev->dev.parent = &pdev->dev;
1222         idev->evbit[0] = BIT_MASK(EV_ABS);
1223         input_set_abs_params(idev, ABS_X,
1224                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1225         input_set_abs_params(idev, ABS_Y,
1226                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1227
1228         ret = input_register_polled_device(applesmc_idev);
1229         if (ret)
1230                 goto out_idev;
1231
1232         return 0;
1233
1234 out_idev:
1235         input_free_polled_device(applesmc_idev);
1236
1237 out_sysfs:
1238         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1239
1240 out:
1241         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1242         return ret;
1243 }
1244
1245 /* Release all ressources used by the accelerometer */
1246 static void applesmc_release_accelerometer(void)
1247 {
1248         input_unregister_polled_device(applesmc_idev);
1249         input_free_polled_device(applesmc_idev);
1250         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1251 }
1252
1253 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1254 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1255         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1256 /* MacBook2: accelerometer and temperature set 1 */
1257         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1258 /* MacBook: accelerometer and temperature set 2 */
1259         { .accelerometer = 1, .light = 0, .temperature_set = 2 },
1260 /* MacMini: temperature set 3 */
1261         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1262 /* MacPro: temperature set 4 */
1263         { .accelerometer = 0, .light = 0, .temperature_set = 4 },
1264 /* iMac: temperature set 5 */
1265         { .accelerometer = 0, .light = 0, .temperature_set = 5 },
1266 /* MacBook3: accelerometer and temperature set 6 */
1267         { .accelerometer = 1, .light = 0, .temperature_set = 6 },
1268 /* MacBook Air: accelerometer, backlight and temperature set 7 */
1269         { .accelerometer = 1, .light = 1, .temperature_set = 7 },
1270 /* MacBook Pro 4: accelerometer, backlight and temperature set 8 */
1271         { .accelerometer = 1, .light = 1, .temperature_set = 8 },
1272 };
1273
1274 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1275  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1276 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1277         { applesmc_dmi_match, "Apple MacBook Air", {
1278           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1279           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1280                 &applesmc_dmi_data[7]},
1281         { applesmc_dmi_match, "Apple MacBook Pro 4", {
1282           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1283           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro4") },
1284                 &applesmc_dmi_data[8]},
1285         { applesmc_dmi_match, "Apple MacBook Pro", {
1286           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1287           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1288                 &applesmc_dmi_data[0]},
1289         { applesmc_dmi_match, "Apple MacBook (v2)", {
1290           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1291           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook2") },
1292                 &applesmc_dmi_data[1]},
1293         { applesmc_dmi_match, "Apple MacBook (v3)", {
1294           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1295           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook3") },
1296                 &applesmc_dmi_data[6]},
1297         { applesmc_dmi_match, "Apple MacBook", {
1298           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1299           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1300                 &applesmc_dmi_data[2]},
1301         { applesmc_dmi_match, "Apple Macmini", {
1302           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1303           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1304                 &applesmc_dmi_data[3]},
1305         { applesmc_dmi_match, "Apple MacPro2", {
1306           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1307           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1308                 &applesmc_dmi_data[4]},
1309         { applesmc_dmi_match, "Apple iMac", {
1310           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1311           DMI_MATCH(DMI_PRODUCT_NAME,"iMac") },
1312                 &applesmc_dmi_data[5]},
1313         { .ident = NULL }
1314 };
1315
1316 static int __init applesmc_init(void)
1317 {
1318         int ret;
1319         int count;
1320         int i;
1321
1322         if (!dmi_check_system(applesmc_whitelist)) {
1323                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1324                 ret = -ENODEV;
1325                 goto out;
1326         }
1327
1328         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1329                                                                 "applesmc")) {
1330                 ret = -ENXIO;
1331                 goto out;
1332         }
1333
1334         ret = platform_driver_register(&applesmc_driver);
1335         if (ret)
1336                 goto out_region;
1337
1338         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1339                                                NULL, 0);
1340         if (IS_ERR(pdev)) {
1341                 ret = PTR_ERR(pdev);
1342                 goto out_driver;
1343         }
1344
1345         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1346         if (ret)
1347                 goto out_device;
1348
1349         /* Create key enumeration sysfs files */
1350         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1351         if (ret)
1352                 goto out_name;
1353
1354         /* create fan files */
1355         count = applesmc_get_fan_count();
1356         if (count < 0) {
1357                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1358         } else {
1359                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1360
1361                 switch (count) {
1362                 default:
1363                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1364                                         " but at most 4 fans are supported"
1365                                                 " by the driver.\n");
1366                 case 4:
1367                         ret = sysfs_create_group(&pdev->dev.kobj,
1368                                                  &fan_attribute_groups[3]);
1369                         if (ret)
1370                                 goto out_key_enumeration;
1371                 case 3:
1372                         ret = sysfs_create_group(&pdev->dev.kobj,
1373                                                  &fan_attribute_groups[2]);
1374                         if (ret)
1375                                 goto out_key_enumeration;
1376                 case 2:
1377                         ret = sysfs_create_group(&pdev->dev.kobj,
1378                                                  &fan_attribute_groups[1]);
1379                         if (ret)
1380                                 goto out_key_enumeration;
1381                 case 1:
1382                         ret = sysfs_create_group(&pdev->dev.kobj,
1383                                                  &fan_attribute_groups[0]);
1384                         if (ret)
1385                                 goto out_fan_1;
1386                 case 0:
1387                         ;
1388                 }
1389         }
1390
1391         for (i = 0;
1392              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1393              i++) {
1394                 if (temperature_attributes[i] == NULL) {
1395                         printk(KERN_ERR "applesmc: More temperature sensors "
1396                                 "in temperature_sensors_sets (at least %i)"
1397                                 "than available sysfs files in "
1398                                 "temperature_attributes (%i), please report "
1399                                 "this bug.\n", i, i-1);
1400                         goto out_temperature;
1401                 }
1402                 ret = sysfs_create_file(&pdev->dev.kobj,
1403                                                 temperature_attributes[i]);
1404                 if (ret)
1405                         goto out_temperature;
1406         }
1407
1408         if (applesmc_accelerometer) {
1409                 ret = applesmc_create_accelerometer();
1410                 if (ret)
1411                         goto out_temperature;
1412         }
1413
1414         if (applesmc_light) {
1415                 /* Add light sensor file */
1416                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1417                 if (ret)
1418                         goto out_accelerometer;
1419
1420                 /* Create the workqueue */
1421                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1422                 if (!applesmc_led_wq) {
1423                         ret = -ENOMEM;
1424                         goto out_light_sysfs;
1425                 }
1426
1427                 /* register as a led device */
1428                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1429                 if (ret < 0)
1430                         goto out_light_wq;
1431         }
1432
1433         hwmon_dev = hwmon_device_register(&pdev->dev);
1434         if (IS_ERR(hwmon_dev)) {
1435                 ret = PTR_ERR(hwmon_dev);
1436                 goto out_light_ledclass;
1437         }
1438
1439         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1440
1441         return 0;
1442
1443 out_light_ledclass:
1444         if (applesmc_light)
1445                 led_classdev_unregister(&applesmc_backlight);
1446 out_light_wq:
1447         if (applesmc_light)
1448                 destroy_workqueue(applesmc_led_wq);
1449 out_light_sysfs:
1450         if (applesmc_light)
1451                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1452 out_accelerometer:
1453         if (applesmc_accelerometer)
1454                 applesmc_release_accelerometer();
1455 out_temperature:
1456         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1457         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1458 out_fan_1:
1459         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1460 out_key_enumeration:
1461         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1462 out_name:
1463         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1464 out_device:
1465         platform_device_unregister(pdev);
1466 out_driver:
1467         platform_driver_unregister(&applesmc_driver);
1468 out_region:
1469         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1470 out:
1471         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1472         return ret;
1473 }
1474
1475 static void __exit applesmc_exit(void)
1476 {
1477         hwmon_device_unregister(hwmon_dev);
1478         if (applesmc_light) {
1479                 led_classdev_unregister(&applesmc_backlight);
1480                 destroy_workqueue(applesmc_led_wq);
1481                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1482         }
1483         if (applesmc_accelerometer)
1484                 applesmc_release_accelerometer();
1485         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1486         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1487         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1488         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1489         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1490         platform_device_unregister(pdev);
1491         platform_driver_unregister(&applesmc_driver);
1492         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1493
1494         printk(KERN_INFO "applesmc: driver unloaded.\n");
1495 }
1496
1497 module_init(applesmc_init);
1498 module_exit(applesmc_exit);
1499
1500 MODULE_AUTHOR("Nicolas Boichat");
1501 MODULE_DESCRIPTION("Apple SMC");
1502 MODULE_LICENSE("GPL v2");