git.oblomov.eu Git - linux-2.6/blob - drivers/hwmon/applesmc.c

   1 /*
   2  * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
   3  * sensors, fan control, keyboard backlight control) used in Intel-based Apple
   4  * computers.
   5  *
   6  * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
   7  *
   8  * Based on hdaps.c driver:
   9  * Copyright (C) 2005 Robert Love <rml@novell.com>
  10  * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
  11  *
  12  * Fan control based on smcFanControl:
  13  * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU General Public License v2 as published by the
  17  * Free Software Foundation.
  18  *
  19  * This program is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  22  * more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along with
  25  * this program; if not, write to the Free Software Foundation, Inc.,
  26  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  27  */
  28
  29 #include <linux/delay.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/input-polldev.h>
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/timer.h>
  35 #include <linux/dmi.h>
  36 #include <linux/mutex.h>
  37 #include <linux/hwmon-sysfs.h>
  38 #include <asm/io.h>
  39 #include <linux/leds.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/workqueue.h>
  42
  43 /* data port used by Apple SMC */
  44 #define APPLESMC_DATA_PORT      0x300
  45 /* command/status port used by Apple SMC */
  46 #define APPLESMC_CMD_PORT       0x304
  47
  48 #define APPLESMC_NR_PORTS       32 /* 0x300-0x31f */
  49
  50 #define APPLESMC_MAX_DATA_LENGTH 32
  51
  52 #define APPLESMC_MIN_WAIT       0x0040
  53 #define APPLESMC_MAX_WAIT       0x8000
  54
  55 #define APPLESMC_STATUS_MASK    0x0f
  56 #define APPLESMC_READ_CMD       0x10
  57 #define APPLESMC_WRITE_CMD      0x11
  58 #define APPLESMC_GET_KEY_BY_INDEX_CMD   0x12
  59 #define APPLESMC_GET_KEY_TYPE_CMD       0x13
  60
  61 #define KEY_COUNT_KEY           "#KEY" /* r-o ui32 */
  62
  63 #define LIGHT_SENSOR_LEFT_KEY   "ALV0" /* r-o {alv (6-10 bytes) */
  64 #define LIGHT_SENSOR_RIGHT_KEY  "ALV1" /* r-o {alv (6-10 bytes) */
  65 #define BACKLIGHT_KEY           "LKSB" /* w-o {lkb (2 bytes) */
  66
  67 #define CLAMSHELL_KEY           "MSLD" /* r-o ui8 (unused) */
  68
  69 #define MOTION_SENSOR_X_KEY     "MO_X" /* r-o sp78 (2 bytes) */
  70 #define MOTION_SENSOR_Y_KEY     "MO_Y" /* r-o sp78 (2 bytes) */
  71 #define MOTION_SENSOR_Z_KEY     "MO_Z" /* r-o sp78 (2 bytes) */
  72 #define MOTION_SENSOR_KEY       "MOCN" /* r/w ui16 */
  73
  74 #define FANS_COUNT              "FNum" /* r-o ui8 */
  75 #define FANS_MANUAL             "FS! " /* r-w ui16 */
  76 #define FAN_ACTUAL_SPEED        "F0Ac" /* r-o fpe2 (2 bytes) */
  77 #define FAN_MIN_SPEED           "F0Mn" /* r-o fpe2 (2 bytes) */
  78 #define FAN_MAX_SPEED           "F0Mx" /* r-o fpe2 (2 bytes) */
  79 #define FAN_SAFE_SPEED          "F0Sf" /* r-o fpe2 (2 bytes) */
  80 #define FAN_TARGET_SPEED        "F0Tg" /* r-w fpe2 (2 bytes) */
  81 #define FAN_POSITION            "F0ID" /* r-o char[16] */
  82
  83 /*
  84  * Temperature sensors keys (sp78 - 2 bytes).
  85  */
  86 static const char* temperature_sensors_sets[][36] = {
  87 /* Set 0: Macbook Pro */
  88         { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
  89           "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
  90 /* Set 1: Macbook2 set */
  91         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "TTF0", "Th0H",
  92           "Th0S", "Th1H", NULL },
  93 /* Set 2: Macbook set */
  94         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S",
  95           "Th1H", "Ts0P", NULL },
  96 /* Set 3: Macmini set */
  97         { "TC0D", "TC0P", NULL },
  98 /* Set 4: Mac Pro (2 x Quad-Core) */
  99         { "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
 100           "TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "THTG", "TH0P",
 101           "TH1P", "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S",
 102           "TM1P", "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P",
 103           "TM9S", "TN0H", "TS0C", NULL },
 104 /* Set 5: iMac */
 105         { "TC0D", "TA0P", "TG0P", "TG0D", "TG0H", "TH0P", "Tm0P", "TO0P",
 106           "Tp0C", NULL },
 107 /* Set 6: Macbook3 set */
 108         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TTF0", "TW0P", "Th0H",
 109           "Th0S", "Th1H", NULL },
 110 /* Set 7: Macbook Air */
 111         { "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TC0P", "TCFP",
 112           "TTF0", "TW0P", "Th0H", "Tp0P", "TpFP", "Ts0P", "Ts0S", NULL },
 113 /* Set 8: Macbook Pro 4,1 (Penryn) */
 114         { "TB0T", "TC0D", "TC0P", "TG0D", "TG0H", "TTF0", "TW0P", "Th0H",
 115           "Th1H", "Th2H", "Tm0P", "Ts0P", NULL },
 116 /* Set 9: Macbook Pro 3,1 (Santa Rosa) */
 117         { "TALP", "TB0T", "TC0D", "TC0P", "TG0D", "TG0H", "TTF0", "TW0P",
 118           "Th0H", "Th1H", "Th2H", "Tm0P", "Ts0P", NULL },
 119 /* Set 10: iMac 5,1 */
 120         { "TA0P", "TC0D", "TC0P", "TG0D", "TH0P", "TO0P", "Tm0P", NULL },
 121 /* Set 11: Macbook 5,1 */
 122         { "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0P", "TN0D", "TN0P",
 123           "TTF0", "Th0H", "Th1H", "ThFH", "Ts0P", "Ts0S", NULL },
 124 /* Set 12: Macbook Pro 5,1 */
 125         { "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0F", "TC0P", "TG0D",
 126           "TG0F", "TG0H", "TG0P", "TG0T", "TG1H", "TN0D", "TN0P", "TTF0",
 127           "Th2H", "Tm0P", "Ts0P", "Ts0S", NULL },
 128 /* Set 13: iMac 8,1 */
 129         { "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TG0P", "TH0P",
 130           "TL0P", "TO0P", "TW0P", "Tm0P", "Tp0P", NULL },
 131 };
 132
 133 /* List of keys used to read/write fan speeds */
 134 static const char* fan_speed_keys[] = {
 135         FAN_ACTUAL_SPEED,
 136         FAN_MIN_SPEED,
 137         FAN_MAX_SPEED,
 138         FAN_SAFE_SPEED,
 139         FAN_TARGET_SPEED
 140 };
 141
 142 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
 143 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
 144
 145 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
 146 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 147 #define APPLESMC_INPUT_FLAT     4
 148
 149 #define SENSOR_X 0
 150 #define SENSOR_Y 1
 151 #define SENSOR_Z 2
 152
 153 /* Structure to be passed to DMI_MATCH function */
 154 struct dmi_match_data {
 155 /* Indicates whether this computer has an accelerometer. */
 156         int accelerometer;
 157 /* Indicates whether this computer has light sensors and keyboard backlight. */
 158         int light;
 159 /* Indicates which temperature sensors set to use. */
 160         int temperature_set;
 161 };
 162
 163 static const int debug;
 164 static struct platform_device *pdev;
 165 static s16 rest_x;
 166 static s16 rest_y;
 167 static struct device *hwmon_dev;
 168 static struct input_polled_dev *applesmc_idev;
 169
 170 /* Indicates whether this computer has an accelerometer. */
 171 static unsigned int applesmc_accelerometer;
 172
 173 /* Indicates whether this computer has light sensors and keyboard backlight. */
 174 static unsigned int applesmc_light;
 175
 176 /* Indicates which temperature sensors set to use. */
 177 static unsigned int applesmc_temperature_set;
 178
 179 static DEFINE_MUTEX(applesmc_lock);
 180
 181 /*
 182  * Last index written to key_at_index sysfs file, and value to use for all other
 183  * key_at_index_* sysfs files.
 184  */
 185 static unsigned int key_at_index;
 186
 187 static struct workqueue_struct *applesmc_led_wq;
 188
 189 /*
 190  * __wait_status - Wait up to 32ms for the status port to get a certain value
 191  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 192  * hold applesmc_lock.
 193  */
 194 static int __wait_status(u8 val)
 195 {
 196         int us;
 197
 198         val = val & APPLESMC_STATUS_MASK;
 199
 200         for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
 201                 udelay(us);
 202                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
 203                         if (debug)
 204                                 printk(KERN_DEBUG
 205                                         "Waited %d us for status %x\n",
 206                                         2 * us - APPLESMC_MIN_WAIT, val);
 207                         return 0;
 208                 }
 209         }
 210
 211         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
 212                                                 val, inb(APPLESMC_CMD_PORT));
 213
 214         return -EIO;
 215 }
 216
 217 /*
 218  * special treatment of command port - on newer macbooks, it seems necessary
 219  * to resend the command byte before polling the status again. Callers must
 220  * hold applesmc_lock.
 221  */
 222 static int send_command(u8 cmd)
 223 {
 224         int us;
 225         for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
 226                 outb(cmd, APPLESMC_CMD_PORT);
 227                 udelay(us);
 228                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c)
 229                         return 0;
 230         }
 231         printk(KERN_WARNING "applesmc: command failed: %x -> %x\n",
 232                 cmd, inb(APPLESMC_CMD_PORT));
 233         return -EIO;
 234 }
 235
 236 /*
 237  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 238  * Returns zero on success or a negative error on failure. Callers must
 239  * hold applesmc_lock.
 240  */
 241 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
 242 {
 243         int i;
 244
 245         if (len > APPLESMC_MAX_DATA_LENGTH) {
 246                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
 247                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 248                 return -EINVAL;
 249         }
 250
 251         if (send_command(APPLESMC_READ_CMD))
 252                 return -EIO;
 253
 254         for (i = 0; i < 4; i++) {
 255                 outb(key[i], APPLESMC_DATA_PORT);
 256                 if (__wait_status(0x04))
 257                         return -EIO;
 258         }
 259         if (debug)
 260                 printk(KERN_DEBUG "<%s", key);
 261
 262         outb(len, APPLESMC_DATA_PORT);
 263         if (debug)
 264                 printk(KERN_DEBUG ">%x", len);
 265
 266         for (i = 0; i < len; i++) {
 267                 if (__wait_status(0x05))
 268                         return -EIO;
 269                 buffer[i] = inb(APPLESMC_DATA_PORT);
 270                 if (debug)
 271                         printk(KERN_DEBUG "<%x", buffer[i]);
 272         }
 273         if (debug)
 274                 printk(KERN_DEBUG "\n");
 275
 276         return 0;
 277 }
 278
 279 /*
 280  * applesmc_write_key - writes len bytes from buffer to a given key.
 281  * Returns zero on success or a negative error on failure. Callers must
 282  * hold applesmc_lock.
 283  */
 284 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
 285 {
 286         int i;
 287
 288         if (len > APPLESMC_MAX_DATA_LENGTH) {
 289                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
 290                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 291                 return -EINVAL;
 292         }
 293
 294         if (send_command(APPLESMC_WRITE_CMD))
 295                 return -EIO;
 296
 297         for (i = 0; i < 4; i++) {
 298                 outb(key[i], APPLESMC_DATA_PORT);
 299                 if (__wait_status(0x04))
 300                         return -EIO;
 301         }
 302
 303         outb(len, APPLESMC_DATA_PORT);
 304
 305         for (i = 0; i < len; i++) {
 306                 if (__wait_status(0x04))
 307                         return -EIO;
 308                 outb(buffer[i], APPLESMC_DATA_PORT);
 309         }
 310
 311         return 0;
 312 }
 313
 314 /*
 315  * applesmc_get_key_at_index - get key at index, and put the result in key
 316  * (char[6]). Returns zero on success or a negative error on failure. Callers
 317  * must hold applesmc_lock.
 318  */
 319 static int applesmc_get_key_at_index(int index, char* key)
 320 {
 321         int i;
 322         u8 readkey[4];
 323         readkey[0] = index >> 24;
 324         readkey[1] = index >> 16;
 325         readkey[2] = index >> 8;
 326         readkey[3] = index;
 327
 328         if (send_command(APPLESMC_GET_KEY_BY_INDEX_CMD))
 329                 return -EIO;
 330
 331         for (i = 0; i < 4; i++) {
 332                 outb(readkey[i], APPLESMC_DATA_PORT);
 333                 if (__wait_status(0x04))
 334                         return -EIO;
 335         }
 336
 337         outb(4, APPLESMC_DATA_PORT);
 338
 339         for (i = 0; i < 4; i++) {
 340                 if (__wait_status(0x05))
 341                         return -EIO;
 342                 key[i] = inb(APPLESMC_DATA_PORT);
 343         }
 344         key[4] = 0;
 345
 346         return 0;
 347 }
 348
 349 /*
 350  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 351  * Returns zero on success or a negative error on failure. Callers must
 352  * hold applesmc_lock.
 353  */
 354 static int applesmc_get_key_type(char* key, char* type)
 355 {
 356         int i;
 357
 358         if (send_command(APPLESMC_GET_KEY_TYPE_CMD))
 359                 return -EIO;
 360
 361         for (i = 0; i < 4; i++) {
 362                 outb(key[i], APPLESMC_DATA_PORT);
 363                 if (__wait_status(0x04))
 364                         return -EIO;
 365         }
 366
 367         outb(6, APPLESMC_DATA_PORT);
 368
 369         for (i = 0; i < 6; i++) {
 370                 if (__wait_status(0x05))
 371                         return -EIO;
 372                 type[i] = inb(APPLESMC_DATA_PORT);
 373         }
 374         type[5] = 0;
 375
 376         return 0;
 377 }
 378
 379 /*
 380  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 381  * hold applesmc_lock.
 382  */
 383 static int applesmc_read_motion_sensor(int index, s16* value)
 384 {
 385         u8 buffer[2];
 386         int ret;
 387
 388         switch (index) {
 389         case SENSOR_X:
 390                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
 391                 break;
 392         case SENSOR_Y:
 393                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
 394                 break;
 395         case SENSOR_Z:
 396                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 397                 break;
 398         default:
 399                 ret = -EINVAL;
 400         }
 401
 402         *value = ((s16)buffer[0] << 8) | buffer[1];
 403
 404         return ret;
 405 }
 406
 407 /*
 408  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 409  * and negative error code on failure.  Can sleep.
 410  */
 411 static int applesmc_device_init(void)
 412 {
 413         int total, ret = -ENXIO;
 414         u8 buffer[2];
 415
 416         if (!applesmc_accelerometer)
 417                 return 0;
 418
 419         mutex_lock(&applesmc_lock);
 420
 421         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 422                 if (debug)
 423                         printk(KERN_DEBUG "applesmc try %d\n", total);
 424                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 425                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
 426                         if (total == INIT_TIMEOUT_MSECS) {
 427                                 printk(KERN_DEBUG "applesmc: device has"
 428                                                 " already been initialized"
 429                                                 " (0x%02x, 0x%02x).\n",
 430                                                 buffer[0], buffer[1]);
 431                         } else {
 432                                 printk(KERN_DEBUG "applesmc: device"
 433                                                 " successfully initialized"
 434                                                 " (0x%02x, 0x%02x).\n",
 435                                                 buffer[0], buffer[1]);
 436                         }
 437                         ret = 0;
 438                         goto out;
 439                 }
 440                 buffer[0] = 0xe0;
 441                 buffer[1] = 0x00;
 442                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 443                 msleep(INIT_WAIT_MSECS);
 444         }
 445
 446         printk(KERN_WARNING "applesmc: failed to init the device\n");
 447
 448 out:
 449         mutex_unlock(&applesmc_lock);
 450         return ret;
 451 }
 452
 453 /*
 454  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 455  * applesmc_lock.
 456  */
 457 static int applesmc_get_fan_count(void)
 458 {
 459         int ret;
 460         u8 buffer[1];
 461
 462         mutex_lock(&applesmc_lock);
 463
 464         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
 465
 466         mutex_unlock(&applesmc_lock);
 467         if (ret)
 468                 return ret;
 469         else
 470                 return buffer[0];
 471 }
 472
 473 /* Device model stuff */
 474 static int applesmc_probe(struct platform_device *dev)
 475 {
 476         int ret;
 477
 478         ret = applesmc_device_init();
 479         if (ret)
 480                 return ret;
 481
 482         printk(KERN_INFO "applesmc: device successfully initialized.\n");
 483         return 0;
 484 }
 485
 486 static int applesmc_resume(struct platform_device *dev)
 487 {
 488         return applesmc_device_init();
 489 }
 490
 491 static struct platform_driver applesmc_driver = {
 492         .probe = applesmc_probe,
 493         .resume = applesmc_resume,
 494         .driver = {
 495                 .name = "applesmc",
 496                 .owner = THIS_MODULE,
 497         },
 498 };
 499
 500 /*
 501  * applesmc_calibrate - Set our "resting" values.  Callers must
 502  * hold applesmc_lock.
 503  */
 504 static void applesmc_calibrate(void)
 505 {
 506         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
 507         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
 508         rest_x = -rest_x;
 509 }
 510
 511 static void applesmc_idev_poll(struct input_polled_dev *dev)
 512 {
 513         struct input_dev *idev = dev->input;
 514         s16 x, y;
 515
 516         mutex_lock(&applesmc_lock);
 517
 518         if (applesmc_read_motion_sensor(SENSOR_X, &x))
 519                 goto out;
 520         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
 521                 goto out;
 522
 523         x = -x;
 524         input_report_abs(idev, ABS_X, x - rest_x);
 525         input_report_abs(idev, ABS_Y, y - rest_y);
 526         input_sync(idev);
 527
 528 out:
 529         mutex_unlock(&applesmc_lock);
 530 }
 531
 532 /* Sysfs Files */
 533
 534 static ssize_t applesmc_name_show(struct device *dev,
 535                                    struct device_attribute *attr, char *buf)
 536 {
 537         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 538 }
 539
 540 static ssize_t applesmc_position_show(struct device *dev,
 541                                    struct device_attribute *attr, char *buf)
 542 {
 543         int ret;
 544         s16 x, y, z;
 545
 546         mutex_lock(&applesmc_lock);
 547
 548         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
 549         if (ret)
 550                 goto out;
 551         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
 552         if (ret)
 553                 goto out;
 554         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
 555         if (ret)
 556                 goto out;
 557
 558 out:
 559         mutex_unlock(&applesmc_lock);
 560         if (ret)
 561                 return ret;
 562         else
 563                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 564 }
 565
 566 static ssize_t applesmc_light_show(struct device *dev,
 567                                 struct device_attribute *attr, char *sysfsbuf)
 568 {
 569         static int data_length;
 570         int ret;
 571         u8 left = 0, right = 0;
 572         u8 buffer[10], query[6];
 573
 574         mutex_lock(&applesmc_lock);
 575
 576         if (!data_length) {
 577                 ret = applesmc_get_key_type(LIGHT_SENSOR_LEFT_KEY, query);
 578                 if (ret)
 579                         goto out;
 580                 data_length = clamp_val(query[0], 0, 10);
 581                 printk(KERN_INFO "applesmc: light sensor data length set to "
 582                         "%d\n", data_length);
 583         }
 584
 585         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
 586         left = buffer[2];
 587         if (ret)
 588                 goto out;
 589         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
 590         right = buffer[2];
 591
 592 out:
 593         mutex_unlock(&applesmc_lock);
 594         if (ret)
 595                 return ret;
 596         else
 597                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 598 }
 599
 600 /* Displays degree Celsius * 1000 */
 601 static ssize_t applesmc_show_temperature(struct device *dev,
 602                         struct device_attribute *devattr, char *sysfsbuf)
 603 {
 604         int ret;
 605         u8 buffer[2];
 606         unsigned int temp;
 607         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 608         const char* key =
 609                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
 610
 611         mutex_lock(&applesmc_lock);
 612
 613         ret = applesmc_read_key(key, buffer, 2);
 614         temp = buffer[0]*1000;
 615         temp += (buffer[1] >> 6) * 250;
 616
 617         mutex_unlock(&applesmc_lock);
 618
 619         if (ret)
 620                 return ret;
 621         else
 622                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
 623 }
 624
 625 static ssize_t applesmc_show_fan_speed(struct device *dev,
 626                                 struct device_attribute *attr, char *sysfsbuf)
 627 {
 628         int ret;
 629         unsigned int speed = 0;
 630         char newkey[5];
 631         u8 buffer[2];
 632         struct sensor_device_attribute_2 *sensor_attr =
 633                                                 to_sensor_dev_attr_2(attr);
 634
 635         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 636         newkey[1] = '0' + sensor_attr->index;
 637         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 638         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 639         newkey[4] = 0;
 640
 641         mutex_lock(&applesmc_lock);
 642
 643         ret = applesmc_read_key(newkey, buffer, 2);
 644         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 645
 646         mutex_unlock(&applesmc_lock);
 647         if (ret)
 648                 return ret;
 649         else
 650                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 651 }
 652
 653 static ssize_t applesmc_store_fan_speed(struct device *dev,
 654                                         struct device_attribute *attr,
 655                                         const char *sysfsbuf, size_t count)
 656 {
 657         int ret;
 658         u32 speed;
 659         char newkey[5];
 660         u8 buffer[2];
 661         struct sensor_device_attribute_2 *sensor_attr =
 662                                                 to_sensor_dev_attr_2(attr);
 663
 664         speed = simple_strtoul(sysfsbuf, NULL, 10);
 665
 666         if (speed > 0x4000) /* Bigger than a 14-bit value */
 667                 return -EINVAL;
 668
 669         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 670         newkey[1] = '0' + sensor_attr->index;
 671         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 672         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 673         newkey[4] = 0;
 674
 675         mutex_lock(&applesmc_lock);
 676
 677         buffer[0] = (speed >> 6) & 0xff;
 678         buffer[1] = (speed << 2) & 0xff;
 679         ret = applesmc_write_key(newkey, buffer, 2);
 680
 681         mutex_unlock(&applesmc_lock);
 682         if (ret)
 683                 return ret;
 684         else
 685                 return count;
 686 }
 687
 688 static ssize_t applesmc_show_fan_manual(struct device *dev,
 689                         struct device_attribute *devattr, char *sysfsbuf)
 690 {
 691         int ret;
 692         u16 manual = 0;
 693         u8 buffer[2];
 694         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 695
 696         mutex_lock(&applesmc_lock);
 697
 698         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 699         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
 700
 701         mutex_unlock(&applesmc_lock);
 702         if (ret)
 703                 return ret;
 704         else
 705                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 706 }
 707
 708 static ssize_t applesmc_store_fan_manual(struct device *dev,
 709                                          struct device_attribute *devattr,
 710                                          const char *sysfsbuf, size_t count)
 711 {
 712         int ret;
 713         u8 buffer[2];
 714         u32 input;
 715         u16 val;
 716         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 717
 718         input = simple_strtoul(sysfsbuf, NULL, 10);
 719
 720         mutex_lock(&applesmc_lock);
 721
 722         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 723         val = (buffer[0] << 8 | buffer[1]);
 724         if (ret)
 725                 goto out;
 726
 727         if (input)
 728                 val = val | (0x01 << attr->index);
 729         else
 730                 val = val & ~(0x01 << attr->index);
 731
 732         buffer[0] = (val >> 8) & 0xFF;
 733         buffer[1] = val & 0xFF;
 734
 735         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 736
 737 out:
 738         mutex_unlock(&applesmc_lock);
 739         if (ret)
 740                 return ret;
 741         else
 742                 return count;
 743 }
 744
 745 static ssize_t applesmc_show_fan_position(struct device *dev,
 746                                 struct device_attribute *attr, char *sysfsbuf)
 747 {
 748         int ret;
 749         char newkey[5];
 750         u8 buffer[17];
 751         struct sensor_device_attribute_2 *sensor_attr =
 752                                                 to_sensor_dev_attr_2(attr);
 753
 754         newkey[0] = FAN_POSITION[0];
 755         newkey[1] = '0' + sensor_attr->index;
 756         newkey[2] = FAN_POSITION[2];
 757         newkey[3] = FAN_POSITION[3];
 758         newkey[4] = 0;
 759
 760         mutex_lock(&applesmc_lock);
 761
 762         ret = applesmc_read_key(newkey, buffer, 16);
 763         buffer[16] = 0;
 764
 765         mutex_unlock(&applesmc_lock);
 766         if (ret)
 767                 return ret;
 768         else
 769                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 770 }
 771
 772 static ssize_t applesmc_calibrate_show(struct device *dev,
 773                                 struct device_attribute *attr, char *sysfsbuf)
 774 {
 775         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 776 }
 777
 778 static ssize_t applesmc_calibrate_store(struct device *dev,
 779         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 780 {
 781         mutex_lock(&applesmc_lock);
 782         applesmc_calibrate();
 783         mutex_unlock(&applesmc_lock);
 784
 785         return count;
 786 }
 787
 788 /* Store the next backlight value to be written by the work */
 789 static unsigned int backlight_value;
 790
 791 static void applesmc_backlight_set(struct work_struct *work)
 792 {
 793         u8 buffer[2];
 794
 795         mutex_lock(&applesmc_lock);
 796         buffer[0] = backlight_value;
 797         buffer[1] = 0x00;
 798         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
 799         mutex_unlock(&applesmc_lock);
 800 }
 801 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 802
 803 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 804                                                 enum led_brightness value)
 805 {
 806         int ret;
 807
 808         backlight_value = value;
 809         ret = queue_work(applesmc_led_wq, &backlight_work);
 810
 811         if (debug && (!ret))
 812                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
 813 }
 814
 815 static ssize_t applesmc_key_count_show(struct device *dev,
 816                                 struct device_attribute *attr, char *sysfsbuf)
 817 {
 818         int ret;
 819         u8 buffer[4];
 820         u32 count;
 821
 822         mutex_lock(&applesmc_lock);
 823
 824         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 825         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 826                                                 ((u32)buffer[2]<<8) + buffer[3];
 827
 828         mutex_unlock(&applesmc_lock);
 829         if (ret)
 830                 return ret;
 831         else
 832                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 833 }
 834
 835 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 836                                 struct device_attribute *attr, char *sysfsbuf)
 837 {
 838         char key[5];
 839         char info[6];
 840         int ret;
 841
 842         mutex_lock(&applesmc_lock);
 843
 844         ret = applesmc_get_key_at_index(key_at_index, key);
 845
 846         if (ret || !key[0]) {
 847                 mutex_unlock(&applesmc_lock);
 848
 849                 return -EINVAL;
 850         }
 851
 852         ret = applesmc_get_key_type(key, info);
 853
 854         if (ret) {
 855                 mutex_unlock(&applesmc_lock);
 856
 857                 return ret;
 858         }
 859
 860         /*
 861          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
 862          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
 863          */
 864         ret = applesmc_read_key(key, sysfsbuf, info[0]);
 865
 866         mutex_unlock(&applesmc_lock);
 867
 868         if (!ret) {
 869                 return info[0];
 870         } else {
 871                 return ret;
 872         }
 873 }
 874
 875 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 876                                 struct device_attribute *attr, char *sysfsbuf)
 877 {
 878         char key[5];
 879         char info[6];
 880         int ret;
 881
 882         mutex_lock(&applesmc_lock);
 883
 884         ret = applesmc_get_key_at_index(key_at_index, key);
 885
 886         if (ret || !key[0]) {
 887                 mutex_unlock(&applesmc_lock);
 888
 889                 return -EINVAL;
 890         }
 891
 892         ret = applesmc_get_key_type(key, info);
 893
 894         mutex_unlock(&applesmc_lock);
 895
 896         if (!ret)
 897                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
 898         else
 899                 return ret;
 900 }
 901
 902 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 903                                 struct device_attribute *attr, char *sysfsbuf)
 904 {
 905         char key[5];
 906         char info[6];
 907         int ret;
 908
 909         mutex_lock(&applesmc_lock);
 910
 911         ret = applesmc_get_key_at_index(key_at_index, key);
 912
 913         if (ret || !key[0]) {
 914                 mutex_unlock(&applesmc_lock);
 915
 916                 return -EINVAL;
 917         }
 918
 919         ret = applesmc_get_key_type(key, info);
 920
 921         mutex_unlock(&applesmc_lock);
 922
 923         if (!ret)
 924                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
 925         else
 926                 return ret;
 927 }
 928
 929 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 930                                 struct device_attribute *attr, char *sysfsbuf)
 931 {
 932         char key[5];
 933         int ret;
 934
 935         mutex_lock(&applesmc_lock);
 936
 937         ret = applesmc_get_key_at_index(key_at_index, key);
 938
 939         mutex_unlock(&applesmc_lock);
 940
 941         if (!ret && key[0])
 942                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 943         else
 944                 return -EINVAL;
 945 }
 946
 947 static ssize_t applesmc_key_at_index_show(struct device *dev,
 948                                 struct device_attribute *attr, char *sysfsbuf)
 949 {
 950         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
 951 }
 952
 953 static ssize_t applesmc_key_at_index_store(struct device *dev,
 954         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 955 {
 956         mutex_lock(&applesmc_lock);
 957
 958         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
 959
 960         mutex_unlock(&applesmc_lock);
 961
 962         return count;
 963 }
 964
 965 static struct led_classdev applesmc_backlight = {
 966         .name                   = "smc::kbd_backlight",
 967         .default_trigger        = "nand-disk",
 968         .brightness_set         = applesmc_brightness_set,
 969 };
 970
 971 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
 972
 973 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
 974 static DEVICE_ATTR(calibrate, 0644,
 975                         applesmc_calibrate_show, applesmc_calibrate_store);
 976
 977 static struct attribute *accelerometer_attributes[] = {
 978         &dev_attr_position.attr,
 979         &dev_attr_calibrate.attr,
 980         NULL
 981 };
 982
 983 static const struct attribute_group accelerometer_attributes_group =
 984         { .attrs = accelerometer_attributes };
 985
 986 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
 987
 988 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
 989 static DEVICE_ATTR(key_at_index, 0644,
 990                 applesmc_key_at_index_show, applesmc_key_at_index_store);
 991 static DEVICE_ATTR(key_at_index_name, 0444,
 992                                         applesmc_key_at_index_name_show, NULL);
 993 static DEVICE_ATTR(key_at_index_type, 0444,
 994                                         applesmc_key_at_index_type_show, NULL);
 995 static DEVICE_ATTR(key_at_index_data_length, 0444,
 996                                 applesmc_key_at_index_data_length_show, NULL);
 997 static DEVICE_ATTR(key_at_index_data, 0444,
 998                                 applesmc_key_at_index_read_show, NULL);
 999
1000 static struct attribute *key_enumeration_attributes[] = {
1001         &dev_attr_key_count.attr,
1002         &dev_attr_key_at_index.attr,
1003         &dev_attr_key_at_index_name.attr,
1004         &dev_attr_key_at_index_type.attr,
1005         &dev_attr_key_at_index_data_length.attr,
1006         &dev_attr_key_at_index_data.attr,
1007         NULL
1008 };
1009
1010 static const struct attribute_group key_enumeration_group =
1011         { .attrs = key_enumeration_attributes };
1012
1013 /*
1014  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
1015  *  - show actual speed
1016  *  - show/store minimum speed
1017  *  - show maximum speed
1018  *  - show safe speed
1019  *  - show/store target speed
1020  *  - show/store manual mode
1021  */
1022 #define sysfs_fan_speeds_offset(offset) \
1023 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
1024                         applesmc_show_fan_speed, NULL, 0, offset-1); \
1025 \
1026 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
1027         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
1028 \
1029 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
1030                         applesmc_show_fan_speed, NULL, 2, offset-1); \
1031 \
1032 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
1033                         applesmc_show_fan_speed, NULL, 3, offset-1); \
1034 \
1035 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
1036         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
1037 \
1038 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
1039         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
1040 \
1041 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
1042         applesmc_show_fan_position, NULL, offset-1); \
1043 \
1044 static struct attribute *fan##offset##_attributes[] = { \
1045         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
1046         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
1047         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
1048         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
1049         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
1050         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
1051         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
1052         NULL \
1053 };
1054
1055 /*
1056  * Create the needed functions for each fan using the macro defined above
1057  * (4 fans are supported)
1058  */
1059 sysfs_fan_speeds_offset(1);
1060 sysfs_fan_speeds_offset(2);
1061 sysfs_fan_speeds_offset(3);
1062 sysfs_fan_speeds_offset(4);
1063
1064 static const struct attribute_group fan_attribute_groups[] = {
1065         { .attrs = fan1_attributes },
1066         { .attrs = fan2_attributes },
1067         { .attrs = fan3_attributes },
1068         { .attrs = fan4_attributes },
1069 };
1070
1071 /*
1072  * Temperature sensors sysfs entries.
1073  */
1074 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1075                                         applesmc_show_temperature, NULL, 0);
1076 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1077                                         applesmc_show_temperature, NULL, 1);
1078 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1079                                         applesmc_show_temperature, NULL, 2);
1080 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1081                                         applesmc_show_temperature, NULL, 3);
1082 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1083                                         applesmc_show_temperature, NULL, 4);
1084 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1085                                         applesmc_show_temperature, NULL, 5);
1086 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1087                                         applesmc_show_temperature, NULL, 6);
1088 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1089                                         applesmc_show_temperature, NULL, 7);
1090 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1091                                         applesmc_show_temperature, NULL, 8);
1092 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1093                                         applesmc_show_temperature, NULL, 9);
1094 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1095                                         applesmc_show_temperature, NULL, 10);
1096 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1097                                         applesmc_show_temperature, NULL, 11);
1098 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1099                                         applesmc_show_temperature, NULL, 12);
1100 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1101                                         applesmc_show_temperature, NULL, 13);
1102 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1103                                         applesmc_show_temperature, NULL, 14);
1104 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1105                                         applesmc_show_temperature, NULL, 15);
1106 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1107                                         applesmc_show_temperature, NULL, 16);
1108 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1109                                         applesmc_show_temperature, NULL, 17);
1110 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1111                                         applesmc_show_temperature, NULL, 18);
1112 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1113                                         applesmc_show_temperature, NULL, 19);
1114 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1115                                         applesmc_show_temperature, NULL, 20);
1116 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1117                                         applesmc_show_temperature, NULL, 21);
1118 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1119                                         applesmc_show_temperature, NULL, 22);
1120 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1121                                         applesmc_show_temperature, NULL, 23);
1122 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1123                                         applesmc_show_temperature, NULL, 24);
1124 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1125                                         applesmc_show_temperature, NULL, 25);
1126 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1127                                         applesmc_show_temperature, NULL, 26);
1128 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1129                                         applesmc_show_temperature, NULL, 27);
1130 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1131                                         applesmc_show_temperature, NULL, 28);
1132 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1133                                         applesmc_show_temperature, NULL, 29);
1134 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1135                                         applesmc_show_temperature, NULL, 30);
1136 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1137                                         applesmc_show_temperature, NULL, 31);
1138 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1139                                         applesmc_show_temperature, NULL, 32);
1140 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1141                                         applesmc_show_temperature, NULL, 33);
1142 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1143                                         applesmc_show_temperature, NULL, 34);
1144
1145 static struct attribute *temperature_attributes[] = {
1146         &sensor_dev_attr_temp1_input.dev_attr.attr,
1147         &sensor_dev_attr_temp2_input.dev_attr.attr,
1148         &sensor_dev_attr_temp3_input.dev_attr.attr,
1149         &sensor_dev_attr_temp4_input.dev_attr.attr,
1150         &sensor_dev_attr_temp5_input.dev_attr.attr,
1151         &sensor_dev_attr_temp6_input.dev_attr.attr,
1152         &sensor_dev_attr_temp7_input.dev_attr.attr,
1153         &sensor_dev_attr_temp8_input.dev_attr.attr,
1154         &sensor_dev_attr_temp9_input.dev_attr.attr,
1155         &sensor_dev_attr_temp10_input.dev_attr.attr,
1156         &sensor_dev_attr_temp11_input.dev_attr.attr,
1157         &sensor_dev_attr_temp12_input.dev_attr.attr,
1158         &sensor_dev_attr_temp13_input.dev_attr.attr,
1159         &sensor_dev_attr_temp14_input.dev_attr.attr,
1160         &sensor_dev_attr_temp15_input.dev_attr.attr,
1161         &sensor_dev_attr_temp16_input.dev_attr.attr,
1162         &sensor_dev_attr_temp17_input.dev_attr.attr,
1163         &sensor_dev_attr_temp18_input.dev_attr.attr,
1164         &sensor_dev_attr_temp19_input.dev_attr.attr,
1165         &sensor_dev_attr_temp20_input.dev_attr.attr,
1166         &sensor_dev_attr_temp21_input.dev_attr.attr,
1167         &sensor_dev_attr_temp22_input.dev_attr.attr,
1168         &sensor_dev_attr_temp23_input.dev_attr.attr,
1169         &sensor_dev_attr_temp24_input.dev_attr.attr,
1170         &sensor_dev_attr_temp25_input.dev_attr.attr,
1171         &sensor_dev_attr_temp26_input.dev_attr.attr,
1172         &sensor_dev_attr_temp27_input.dev_attr.attr,
1173         &sensor_dev_attr_temp28_input.dev_attr.attr,
1174         &sensor_dev_attr_temp29_input.dev_attr.attr,
1175         &sensor_dev_attr_temp30_input.dev_attr.attr,
1176         &sensor_dev_attr_temp31_input.dev_attr.attr,
1177         &sensor_dev_attr_temp32_input.dev_attr.attr,
1178         &sensor_dev_attr_temp33_input.dev_attr.attr,
1179         &sensor_dev_attr_temp34_input.dev_attr.attr,
1180         &sensor_dev_attr_temp35_input.dev_attr.attr,
1181         NULL
1182 };
1183
1184 static const struct attribute_group temperature_attributes_group =
1185         { .attrs = temperature_attributes };
1186
1187 /* Module stuff */
1188
1189 /*
1190  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1191  */
1192 static int applesmc_dmi_match(const struct dmi_system_id *id)
1193 {
1194         int i = 0;
1195         struct dmi_match_data* dmi_data = id->driver_data;
1196         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1197         applesmc_accelerometer = dmi_data->accelerometer;
1198         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1199                                 applesmc_accelerometer ? "with" : "without");
1200         applesmc_light = dmi_data->light;
1201         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1202                                         applesmc_light ? "with" : "without");
1203
1204         applesmc_temperature_set =  dmi_data->temperature_set;
1205         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1206                 i++;
1207         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1208         return 1;
1209 }
1210
1211 /* Create accelerometer ressources */
1212 static int applesmc_create_accelerometer(void)
1213 {
1214         struct input_dev *idev;
1215         int ret;
1216
1217         ret = sysfs_create_group(&pdev->dev.kobj,
1218                                         &accelerometer_attributes_group);
1219         if (ret)
1220                 goto out;
1221
1222         applesmc_idev = input_allocate_polled_device();
1223         if (!applesmc_idev) {
1224                 ret = -ENOMEM;
1225                 goto out_sysfs;
1226         }
1227
1228         applesmc_idev->poll = applesmc_idev_poll;
1229         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1230
1231         /* initial calibrate for the input device */
1232         applesmc_calibrate();
1233
1234         /* initialize the input device */
1235         idev = applesmc_idev->input;
1236         idev->name = "applesmc";
1237         idev->id.bustype = BUS_HOST;
1238         idev->dev.parent = &pdev->dev;
1239         idev->evbit[0] = BIT_MASK(EV_ABS);
1240         input_set_abs_params(idev, ABS_X,
1241                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1242         input_set_abs_params(idev, ABS_Y,
1243                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1244
1245         ret = input_register_polled_device(applesmc_idev);
1246         if (ret)
1247                 goto out_idev;
1248
1249         return 0;
1250
1251 out_idev:
1252         input_free_polled_device(applesmc_idev);
1253
1254 out_sysfs:
1255         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1256
1257 out:
1258         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1259         return ret;
1260 }
1261
1262 /* Release all ressources used by the accelerometer */
1263 static void applesmc_release_accelerometer(void)
1264 {
1265         input_unregister_polled_device(applesmc_idev);
1266         input_free_polled_device(applesmc_idev);
1267         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1268 }
1269
1270 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1271 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1272         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1273 /* MacBook2: accelerometer and temperature set 1 */
1274         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1275 /* MacBook: accelerometer and temperature set 2 */
1276         { .accelerometer = 1, .light = 0, .temperature_set = 2 },
1277 /* MacMini: temperature set 3 */
1278         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1279 /* MacPro: temperature set 4 */
1280         { .accelerometer = 0, .light = 0, .temperature_set = 4 },
1281 /* iMac: temperature set 5 */
1282         { .accelerometer = 0, .light = 0, .temperature_set = 5 },
1283 /* MacBook3: accelerometer and temperature set 6 */
1284         { .accelerometer = 1, .light = 0, .temperature_set = 6 },
1285 /* MacBook Air: accelerometer, backlight and temperature set 7 */
1286         { .accelerometer = 1, .light = 1, .temperature_set = 7 },
1287 /* MacBook Pro 4: accelerometer, backlight and temperature set 8 */
1288         { .accelerometer = 1, .light = 1, .temperature_set = 8 },
1289 /* MacBook Pro 3: accelerometer, backlight and temperature set 9 */
1290         { .accelerometer = 1, .light = 1, .temperature_set = 9 },
1291 /* iMac 5: light sensor only, temperature set 10 */
1292         { .accelerometer = 0, .light = 0, .temperature_set = 10 },
1293 /* MacBook 5: accelerometer, backlight and temperature set 11 */
1294         { .accelerometer = 1, .light = 1, .temperature_set = 11 },
1295 /* MacBook Pro 5: accelerometer, backlight and temperature set 12 */
1296         { .accelerometer = 1, .light = 1, .temperature_set = 12 },
1297 /* iMac 8: light sensor only, temperature set 13 */
1298         { .accelerometer = 0, .light = 0, .temperature_set = 13 },
1299 };
1300
1301 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1302  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1303 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1304         { applesmc_dmi_match, "Apple MacBook Air", {
1305           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1306           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1307                 &applesmc_dmi_data[7]},
1308         { applesmc_dmi_match, "Apple MacBook Pro 5", {
1309           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1310           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5") },
1311                 &applesmc_dmi_data[12]},
1312         { applesmc_dmi_match, "Apple MacBook Pro 4", {
1313           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1314           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro4") },
1315                 &applesmc_dmi_data[8]},
1316         { applesmc_dmi_match, "Apple MacBook Pro 3", {
1317           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1318           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3") },
1319                 &applesmc_dmi_data[9]},
1320         { applesmc_dmi_match, "Apple MacBook Pro", {
1321           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1322           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1323                 &applesmc_dmi_data[0]},
1324         { applesmc_dmi_match, "Apple MacBook (v2)", {
1325           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1326           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook2") },
1327                 &applesmc_dmi_data[1]},
1328         { applesmc_dmi_match, "Apple MacBook (v3)", {
1329           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1330           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook3") },
1331                 &applesmc_dmi_data[6]},
1332         { applesmc_dmi_match, "Apple MacBook 5", {
1333           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1334           DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5") },
1335                 &applesmc_dmi_data[11]},
1336         { applesmc_dmi_match, "Apple MacBook", {
1337           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1338           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1339                 &applesmc_dmi_data[2]},
1340         { applesmc_dmi_match, "Apple Macmini", {
1341           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1342           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1343                 &applesmc_dmi_data[3]},
1344         { applesmc_dmi_match, "Apple MacPro2", {
1345           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1346           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1347                 &applesmc_dmi_data[4]},
1348         { applesmc_dmi_match, "Apple iMac 8", {
1349           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1350           DMI_MATCH(DMI_PRODUCT_NAME, "iMac8") },
1351                 &applesmc_dmi_data[13]},
1352         { applesmc_dmi_match, "Apple iMac 5", {
1353           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1354           DMI_MATCH(DMI_PRODUCT_NAME, "iMac5") },
1355                 &applesmc_dmi_data[10]},
1356         { applesmc_dmi_match, "Apple iMac", {
1357           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1358           DMI_MATCH(DMI_PRODUCT_NAME,"iMac") },
1359                 &applesmc_dmi_data[5]},
1360         { .ident = NULL }
1361 };
1362
1363 static int __init applesmc_init(void)
1364 {
1365         int ret;
1366         int count;
1367         int i;
1368
1369         if (!dmi_check_system(applesmc_whitelist)) {
1370                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1371                 ret = -ENODEV;
1372                 goto out;
1373         }
1374
1375         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1376                                                                 "applesmc")) {
1377                 ret = -ENXIO;
1378                 goto out;
1379         }
1380
1381         ret = platform_driver_register(&applesmc_driver);
1382         if (ret)
1383                 goto out_region;
1384
1385         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1386                                                NULL, 0);
1387         if (IS_ERR(pdev)) {
1388                 ret = PTR_ERR(pdev);
1389                 goto out_driver;
1390         }
1391
1392         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1393         if (ret)
1394                 goto out_device;
1395
1396         /* Create key enumeration sysfs files */
1397         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1398         if (ret)
1399                 goto out_name;
1400
1401         /* create fan files */
1402         count = applesmc_get_fan_count();
1403         if (count < 0) {
1404                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1405         } else {
1406                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1407
1408                 switch (count) {
1409                 default:
1410                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1411                                         " but at most 4 fans are supported"
1412                                                 " by the driver.\n");
1413                 case 4:
1414                         ret = sysfs_create_group(&pdev->dev.kobj,
1415                                                  &fan_attribute_groups[3]);
1416                         if (ret)
1417                                 goto out_key_enumeration;
1418                 case 3:
1419                         ret = sysfs_create_group(&pdev->dev.kobj,
1420                                                  &fan_attribute_groups[2]);
1421                         if (ret)
1422                                 goto out_key_enumeration;
1423                 case 2:
1424                         ret = sysfs_create_group(&pdev->dev.kobj,
1425                                                  &fan_attribute_groups[1]);
1426                         if (ret)
1427                                 goto out_key_enumeration;
1428                 case 1:
1429                         ret = sysfs_create_group(&pdev->dev.kobj,
1430                                                  &fan_attribute_groups[0]);
1431                         if (ret)
1432                                 goto out_fan_1;
1433                 case 0:
1434                         ;
1435                 }
1436         }
1437
1438         for (i = 0;
1439              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1440              i++) {
1441                 if (temperature_attributes[i] == NULL) {
1442                         printk(KERN_ERR "applesmc: More temperature sensors "
1443                                 "in temperature_sensors_sets (at least %i)"
1444                                 "than available sysfs files in "
1445                                 "temperature_attributes (%i), please report "
1446                                 "this bug.\n", i, i-1);
1447                         goto out_temperature;
1448                 }
1449                 ret = sysfs_create_file(&pdev->dev.kobj,
1450                                                 temperature_attributes[i]);
1451                 if (ret)
1452                         goto out_temperature;
1453         }
1454
1455         if (applesmc_accelerometer) {
1456                 ret = applesmc_create_accelerometer();
1457                 if (ret)
1458                         goto out_temperature;
1459         }
1460
1461         if (applesmc_light) {
1462                 /* Add light sensor file */
1463                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1464                 if (ret)
1465                         goto out_accelerometer;
1466
1467                 /* Create the workqueue */
1468                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1469                 if (!applesmc_led_wq) {
1470                         ret = -ENOMEM;
1471                         goto out_light_sysfs;
1472                 }
1473
1474                 /* register as a led device */
1475                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1476                 if (ret < 0)
1477                         goto out_light_wq;
1478         }
1479
1480         hwmon_dev = hwmon_device_register(&pdev->dev);
1481         if (IS_ERR(hwmon_dev)) {
1482                 ret = PTR_ERR(hwmon_dev);
1483                 goto out_light_ledclass;
1484         }
1485
1486         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1487
1488         return 0;
1489
1490 out_light_ledclass:
1491         if (applesmc_light)
1492                 led_classdev_unregister(&applesmc_backlight);
1493 out_light_wq:
1494         if (applesmc_light)
1495                 destroy_workqueue(applesmc_led_wq);
1496 out_light_sysfs:
1497         if (applesmc_light)
1498                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1499 out_accelerometer:
1500         if (applesmc_accelerometer)
1501                 applesmc_release_accelerometer();
1502 out_temperature:
1503         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1504         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1505 out_fan_1:
1506         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1507 out_key_enumeration:
1508         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1509 out_name:
1510         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1511 out_device:
1512         platform_device_unregister(pdev);
1513 out_driver:
1514         platform_driver_unregister(&applesmc_driver);
1515 out_region:
1516         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1517 out:
1518         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1519         return ret;
1520 }
1521
1522 static void __exit applesmc_exit(void)
1523 {
1524         hwmon_device_unregister(hwmon_dev);
1525         if (applesmc_light) {
1526                 led_classdev_unregister(&applesmc_backlight);
1527                 destroy_workqueue(applesmc_led_wq);
1528                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1529         }
1530         if (applesmc_accelerometer)
1531                 applesmc_release_accelerometer();
1532         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1533         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1534         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1535         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1536         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1537         platform_device_unregister(pdev);
1538         platform_driver_unregister(&applesmc_driver);
1539         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1540
1541         printk(KERN_INFO "applesmc: driver unloaded.\n");
1542 }
1543
1544 module_init(applesmc_init);
1545 module_exit(applesmc_exit);
1546
1547 MODULE_AUTHOR("Nicolas Boichat");
1548 MODULE_DESCRIPTION("Apple SMC");
1549 MODULE_LICENSE("GPL v2");