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