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 /* Set 14: iMac 6,1 */
 132         { "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TG0P", "TH0P",
 133           "TO0P", "Tp0P", NULL },
 134 };
 135
 136 /* List of keys used to read/write fan speeds */
 137 static const char* fan_speed_keys[] = {
 138         FAN_ACTUAL_SPEED,
 139         FAN_MIN_SPEED,
 140         FAN_MAX_SPEED,
 141         FAN_SAFE_SPEED,
 142         FAN_TARGET_SPEED
 143 };
 144
 145 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
 146 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
 147
 148 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
 149 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
 150 #define APPLESMC_INPUT_FLAT     4
 151
 152 #define SENSOR_X 0
 153 #define SENSOR_Y 1
 154 #define SENSOR_Z 2
 155
 156 /* Structure to be passed to DMI_MATCH function */
 157 struct dmi_match_data {
 158 /* Indicates whether this computer has an accelerometer. */
 159         int accelerometer;
 160 /* Indicates whether this computer has light sensors and keyboard backlight. */
 161         int light;
 162 /* Indicates which temperature sensors set to use. */
 163         int temperature_set;
 164 };
 165
 166 static const int debug;
 167 static struct platform_device *pdev;
 168 static s16 rest_x;
 169 static s16 rest_y;
 170 static struct device *hwmon_dev;
 171 static struct input_polled_dev *applesmc_idev;
 172
 173 /* Indicates whether this computer has an accelerometer. */
 174 static unsigned int applesmc_accelerometer;
 175
 176 /* Indicates whether this computer has light sensors and keyboard backlight. */
 177 static unsigned int applesmc_light;
 178
 179 /* Indicates which temperature sensors set to use. */
 180 static unsigned int applesmc_temperature_set;
 181
 182 static DEFINE_MUTEX(applesmc_lock);
 183
 184 /*
 185  * Last index written to key_at_index sysfs file, and value to use for all other
 186  * key_at_index_* sysfs files.
 187  */
 188 static unsigned int key_at_index;
 189
 190 static struct workqueue_struct *applesmc_led_wq;
 191
 192 /*
 193  * __wait_status - Wait up to 32ms for the status port to get a certain value
 194  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
 195  * hold applesmc_lock.
 196  */
 197 static int __wait_status(u8 val)
 198 {
 199         int us;
 200
 201         val = val & APPLESMC_STATUS_MASK;
 202
 203         for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
 204                 udelay(us);
 205                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
 206                         if (debug)
 207                                 printk(KERN_DEBUG
 208                                         "Waited %d us for status %x\n",
 209                                         2 * us - APPLESMC_MIN_WAIT, val);
 210                         return 0;
 211                 }
 212         }
 213
 214         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
 215                                                 val, inb(APPLESMC_CMD_PORT));
 216
 217         return -EIO;
 218 }
 219
 220 /*
 221  * special treatment of command port - on newer macbooks, it seems necessary
 222  * to resend the command byte before polling the status again. Callers must
 223  * hold applesmc_lock.
 224  */
 225 static int send_command(u8 cmd)
 226 {
 227         int us;
 228         for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
 229                 outb(cmd, APPLESMC_CMD_PORT);
 230                 udelay(us);
 231                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c)
 232                         return 0;
 233         }
 234         printk(KERN_WARNING "applesmc: command failed: %x -> %x\n",
 235                 cmd, inb(APPLESMC_CMD_PORT));
 236         return -EIO;
 237 }
 238
 239 /*
 240  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
 241  * Returns zero on success or a negative error on failure. Callers must
 242  * hold applesmc_lock.
 243  */
 244 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
 245 {
 246         int i;
 247
 248         if (len > APPLESMC_MAX_DATA_LENGTH) {
 249                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
 250                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 251                 return -EINVAL;
 252         }
 253
 254         if (send_command(APPLESMC_READ_CMD))
 255                 return -EIO;
 256
 257         for (i = 0; i < 4; i++) {
 258                 outb(key[i], APPLESMC_DATA_PORT);
 259                 if (__wait_status(0x04))
 260                         return -EIO;
 261         }
 262         if (debug)
 263                 printk(KERN_DEBUG "<%s", key);
 264
 265         outb(len, APPLESMC_DATA_PORT);
 266         if (debug)
 267                 printk(KERN_DEBUG ">%x", len);
 268
 269         for (i = 0; i < len; i++) {
 270                 if (__wait_status(0x05))
 271                         return -EIO;
 272                 buffer[i] = inb(APPLESMC_DATA_PORT);
 273                 if (debug)
 274                         printk(KERN_DEBUG "<%x", buffer[i]);
 275         }
 276         if (debug)
 277                 printk(KERN_DEBUG "\n");
 278
 279         return 0;
 280 }
 281
 282 /*
 283  * applesmc_write_key - writes len bytes from buffer to a given key.
 284  * Returns zero on success or a negative error on failure. Callers must
 285  * hold applesmc_lock.
 286  */
 287 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
 288 {
 289         int i;
 290
 291         if (len > APPLESMC_MAX_DATA_LENGTH) {
 292                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
 293                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
 294                 return -EINVAL;
 295         }
 296
 297         if (send_command(APPLESMC_WRITE_CMD))
 298                 return -EIO;
 299
 300         for (i = 0; i < 4; i++) {
 301                 outb(key[i], APPLESMC_DATA_PORT);
 302                 if (__wait_status(0x04))
 303                         return -EIO;
 304         }
 305
 306         outb(len, APPLESMC_DATA_PORT);
 307
 308         for (i = 0; i < len; i++) {
 309                 if (__wait_status(0x04))
 310                         return -EIO;
 311                 outb(buffer[i], APPLESMC_DATA_PORT);
 312         }
 313
 314         return 0;
 315 }
 316
 317 /*
 318  * applesmc_get_key_at_index - get key at index, and put the result in key
 319  * (char[6]). Returns zero on success or a negative error on failure. Callers
 320  * must hold applesmc_lock.
 321  */
 322 static int applesmc_get_key_at_index(int index, char* key)
 323 {
 324         int i;
 325         u8 readkey[4];
 326         readkey[0] = index >> 24;
 327         readkey[1] = index >> 16;
 328         readkey[2] = index >> 8;
 329         readkey[3] = index;
 330
 331         if (send_command(APPLESMC_GET_KEY_BY_INDEX_CMD))
 332                 return -EIO;
 333
 334         for (i = 0; i < 4; i++) {
 335                 outb(readkey[i], APPLESMC_DATA_PORT);
 336                 if (__wait_status(0x04))
 337                         return -EIO;
 338         }
 339
 340         outb(4, APPLESMC_DATA_PORT);
 341
 342         for (i = 0; i < 4; i++) {
 343                 if (__wait_status(0x05))
 344                         return -EIO;
 345                 key[i] = inb(APPLESMC_DATA_PORT);
 346         }
 347         key[4] = 0;
 348
 349         return 0;
 350 }
 351
 352 /*
 353  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
 354  * Returns zero on success or a negative error on failure. Callers must
 355  * hold applesmc_lock.
 356  */
 357 static int applesmc_get_key_type(char* key, char* type)
 358 {
 359         int i;
 360
 361         if (send_command(APPLESMC_GET_KEY_TYPE_CMD))
 362                 return -EIO;
 363
 364         for (i = 0; i < 4; i++) {
 365                 outb(key[i], APPLESMC_DATA_PORT);
 366                 if (__wait_status(0x04))
 367                         return -EIO;
 368         }
 369
 370         outb(6, APPLESMC_DATA_PORT);
 371
 372         for (i = 0; i < 6; i++) {
 373                 if (__wait_status(0x05))
 374                         return -EIO;
 375                 type[i] = inb(APPLESMC_DATA_PORT);
 376         }
 377         type[5] = 0;
 378
 379         return 0;
 380 }
 381
 382 /*
 383  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
 384  * hold applesmc_lock.
 385  */
 386 static int applesmc_read_motion_sensor(int index, s16* value)
 387 {
 388         u8 buffer[2];
 389         int ret;
 390
 391         switch (index) {
 392         case SENSOR_X:
 393                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
 394                 break;
 395         case SENSOR_Y:
 396                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
 397                 break;
 398         case SENSOR_Z:
 399                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 400                 break;
 401         default:
 402                 ret = -EINVAL;
 403         }
 404
 405         *value = ((s16)buffer[0] << 8) | buffer[1];
 406
 407         return ret;
 408 }
 409
 410 /*
 411  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
 412  * and negative error code on failure.  Can sleep.
 413  */
 414 static int applesmc_device_init(void)
 415 {
 416         int total, ret = -ENXIO;
 417         u8 buffer[2];
 418
 419         if (!applesmc_accelerometer)
 420                 return 0;
 421
 422         mutex_lock(&applesmc_lock);
 423
 424         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
 425                 if (debug)
 426                         printk(KERN_DEBUG "applesmc try %d\n", total);
 427                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
 428                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
 429                         if (total == INIT_TIMEOUT_MSECS) {
 430                                 printk(KERN_DEBUG "applesmc: device has"
 431                                                 " already been initialized"
 432                                                 " (0x%02x, 0x%02x).\n",
 433                                                 buffer[0], buffer[1]);
 434                         } else {
 435                                 printk(KERN_DEBUG "applesmc: device"
 436                                                 " successfully initialized"
 437                                                 " (0x%02x, 0x%02x).\n",
 438                                                 buffer[0], buffer[1]);
 439                         }
 440                         ret = 0;
 441                         goto out;
 442                 }
 443                 buffer[0] = 0xe0;
 444                 buffer[1] = 0x00;
 445                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
 446                 msleep(INIT_WAIT_MSECS);
 447         }
 448
 449         printk(KERN_WARNING "applesmc: failed to init the device\n");
 450
 451 out:
 452         mutex_unlock(&applesmc_lock);
 453         return ret;
 454 }
 455
 456 /*
 457  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
 458  * applesmc_lock.
 459  */
 460 static int applesmc_get_fan_count(void)
 461 {
 462         int ret;
 463         u8 buffer[1];
 464
 465         mutex_lock(&applesmc_lock);
 466
 467         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
 468
 469         mutex_unlock(&applesmc_lock);
 470         if (ret)
 471                 return ret;
 472         else
 473                 return buffer[0];
 474 }
 475
 476 /* Device model stuff */
 477 static int applesmc_probe(struct platform_device *dev)
 478 {
 479         int ret;
 480
 481         ret = applesmc_device_init();
 482         if (ret)
 483                 return ret;
 484
 485         printk(KERN_INFO "applesmc: device successfully initialized.\n");
 486         return 0;
 487 }
 488
 489 static int applesmc_resume(struct platform_device *dev)
 490 {
 491         return applesmc_device_init();
 492 }
 493
 494 static struct platform_driver applesmc_driver = {
 495         .probe = applesmc_probe,
 496         .resume = applesmc_resume,
 497         .driver = {
 498                 .name = "applesmc",
 499                 .owner = THIS_MODULE,
 500         },
 501 };
 502
 503 /*
 504  * applesmc_calibrate - Set our "resting" values.  Callers must
 505  * hold applesmc_lock.
 506  */
 507 static void applesmc_calibrate(void)
 508 {
 509         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
 510         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
 511         rest_x = -rest_x;
 512 }
 513
 514 static void applesmc_idev_poll(struct input_polled_dev *dev)
 515 {
 516         struct input_dev *idev = dev->input;
 517         s16 x, y;
 518
 519         mutex_lock(&applesmc_lock);
 520
 521         if (applesmc_read_motion_sensor(SENSOR_X, &x))
 522                 goto out;
 523         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
 524                 goto out;
 525
 526         x = -x;
 527         input_report_abs(idev, ABS_X, x - rest_x);
 528         input_report_abs(idev, ABS_Y, y - rest_y);
 529         input_sync(idev);
 530
 531 out:
 532         mutex_unlock(&applesmc_lock);
 533 }
 534
 535 /* Sysfs Files */
 536
 537 static ssize_t applesmc_name_show(struct device *dev,
 538                                    struct device_attribute *attr, char *buf)
 539 {
 540         return snprintf(buf, PAGE_SIZE, "applesmc\n");
 541 }
 542
 543 static ssize_t applesmc_position_show(struct device *dev,
 544                                    struct device_attribute *attr, char *buf)
 545 {
 546         int ret;
 547         s16 x, y, z;
 548
 549         mutex_lock(&applesmc_lock);
 550
 551         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
 552         if (ret)
 553                 goto out;
 554         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
 555         if (ret)
 556                 goto out;
 557         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
 558         if (ret)
 559                 goto out;
 560
 561 out:
 562         mutex_unlock(&applesmc_lock);
 563         if (ret)
 564                 return ret;
 565         else
 566                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
 567 }
 568
 569 static ssize_t applesmc_light_show(struct device *dev,
 570                                 struct device_attribute *attr, char *sysfsbuf)
 571 {
 572         static int data_length;
 573         int ret;
 574         u8 left = 0, right = 0;
 575         u8 buffer[10], query[6];
 576
 577         mutex_lock(&applesmc_lock);
 578
 579         if (!data_length) {
 580                 ret = applesmc_get_key_type(LIGHT_SENSOR_LEFT_KEY, query);
 581                 if (ret)
 582                         goto out;
 583                 data_length = clamp_val(query[0], 0, 10);
 584                 printk(KERN_INFO "applesmc: light sensor data length set to "
 585                         "%d\n", data_length);
 586         }
 587
 588         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
 589         left = buffer[2];
 590         if (ret)
 591                 goto out;
 592         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
 593         right = buffer[2];
 594
 595 out:
 596         mutex_unlock(&applesmc_lock);
 597         if (ret)
 598                 return ret;
 599         else
 600                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
 601 }
 602
 603 /* Displays degree Celsius * 1000 */
 604 static ssize_t applesmc_show_temperature(struct device *dev,
 605                         struct device_attribute *devattr, char *sysfsbuf)
 606 {
 607         int ret;
 608         u8 buffer[2];
 609         unsigned int temp;
 610         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 611         const char* key =
 612                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
 613
 614         mutex_lock(&applesmc_lock);
 615
 616         ret = applesmc_read_key(key, buffer, 2);
 617         temp = buffer[0]*1000;
 618         temp += (buffer[1] >> 6) * 250;
 619
 620         mutex_unlock(&applesmc_lock);
 621
 622         if (ret)
 623                 return ret;
 624         else
 625                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
 626 }
 627
 628 static ssize_t applesmc_show_fan_speed(struct device *dev,
 629                                 struct device_attribute *attr, char *sysfsbuf)
 630 {
 631         int ret;
 632         unsigned int speed = 0;
 633         char newkey[5];
 634         u8 buffer[2];
 635         struct sensor_device_attribute_2 *sensor_attr =
 636                                                 to_sensor_dev_attr_2(attr);
 637
 638         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 639         newkey[1] = '0' + sensor_attr->index;
 640         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 641         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 642         newkey[4] = 0;
 643
 644         mutex_lock(&applesmc_lock);
 645
 646         ret = applesmc_read_key(newkey, buffer, 2);
 647         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
 648
 649         mutex_unlock(&applesmc_lock);
 650         if (ret)
 651                 return ret;
 652         else
 653                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 654 }
 655
 656 static ssize_t applesmc_store_fan_speed(struct device *dev,
 657                                         struct device_attribute *attr,
 658                                         const char *sysfsbuf, size_t count)
 659 {
 660         int ret;
 661         u32 speed;
 662         char newkey[5];
 663         u8 buffer[2];
 664         struct sensor_device_attribute_2 *sensor_attr =
 665                                                 to_sensor_dev_attr_2(attr);
 666
 667         speed = simple_strtoul(sysfsbuf, NULL, 10);
 668
 669         if (speed > 0x4000) /* Bigger than a 14-bit value */
 670                 return -EINVAL;
 671
 672         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
 673         newkey[1] = '0' + sensor_attr->index;
 674         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
 675         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
 676         newkey[4] = 0;
 677
 678         mutex_lock(&applesmc_lock);
 679
 680         buffer[0] = (speed >> 6) & 0xff;
 681         buffer[1] = (speed << 2) & 0xff;
 682         ret = applesmc_write_key(newkey, buffer, 2);
 683
 684         mutex_unlock(&applesmc_lock);
 685         if (ret)
 686                 return ret;
 687         else
 688                 return count;
 689 }
 690
 691 static ssize_t applesmc_show_fan_manual(struct device *dev,
 692                         struct device_attribute *devattr, char *sysfsbuf)
 693 {
 694         int ret;
 695         u16 manual = 0;
 696         u8 buffer[2];
 697         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 698
 699         mutex_lock(&applesmc_lock);
 700
 701         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 702         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
 703
 704         mutex_unlock(&applesmc_lock);
 705         if (ret)
 706                 return ret;
 707         else
 708                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 709 }
 710
 711 static ssize_t applesmc_store_fan_manual(struct device *dev,
 712                                          struct device_attribute *devattr,
 713                                          const char *sysfsbuf, size_t count)
 714 {
 715         int ret;
 716         u8 buffer[2];
 717         u32 input;
 718         u16 val;
 719         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 720
 721         input = simple_strtoul(sysfsbuf, NULL, 10);
 722
 723         mutex_lock(&applesmc_lock);
 724
 725         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
 726         val = (buffer[0] << 8 | buffer[1]);
 727         if (ret)
 728                 goto out;
 729
 730         if (input)
 731                 val = val | (0x01 << attr->index);
 732         else
 733                 val = val & ~(0x01 << attr->index);
 734
 735         buffer[0] = (val >> 8) & 0xFF;
 736         buffer[1] = val & 0xFF;
 737
 738         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
 739
 740 out:
 741         mutex_unlock(&applesmc_lock);
 742         if (ret)
 743                 return ret;
 744         else
 745                 return count;
 746 }
 747
 748 static ssize_t applesmc_show_fan_position(struct device *dev,
 749                                 struct device_attribute *attr, char *sysfsbuf)
 750 {
 751         int ret;
 752         char newkey[5];
 753         u8 buffer[17];
 754         struct sensor_device_attribute_2 *sensor_attr =
 755                                                 to_sensor_dev_attr_2(attr);
 756
 757         newkey[0] = FAN_POSITION[0];
 758         newkey[1] = '0' + sensor_attr->index;
 759         newkey[2] = FAN_POSITION[2];
 760         newkey[3] = FAN_POSITION[3];
 761         newkey[4] = 0;
 762
 763         mutex_lock(&applesmc_lock);
 764
 765         ret = applesmc_read_key(newkey, buffer, 16);
 766         buffer[16] = 0;
 767
 768         mutex_unlock(&applesmc_lock);
 769         if (ret)
 770                 return ret;
 771         else
 772                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
 773 }
 774
 775 static ssize_t applesmc_calibrate_show(struct device *dev,
 776                                 struct device_attribute *attr, char *sysfsbuf)
 777 {
 778         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
 779 }
 780
 781 static ssize_t applesmc_calibrate_store(struct device *dev,
 782         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 783 {
 784         mutex_lock(&applesmc_lock);
 785         applesmc_calibrate();
 786         mutex_unlock(&applesmc_lock);
 787
 788         return count;
 789 }
 790
 791 /* Store the next backlight value to be written by the work */
 792 static unsigned int backlight_value;
 793
 794 static void applesmc_backlight_set(struct work_struct *work)
 795 {
 796         u8 buffer[2];
 797
 798         mutex_lock(&applesmc_lock);
 799         buffer[0] = backlight_value;
 800         buffer[1] = 0x00;
 801         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
 802         mutex_unlock(&applesmc_lock);
 803 }
 804 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
 805
 806 static void applesmc_brightness_set(struct led_classdev *led_cdev,
 807                                                 enum led_brightness value)
 808 {
 809         int ret;
 810
 811         backlight_value = value;
 812         ret = queue_work(applesmc_led_wq, &backlight_work);
 813
 814         if (debug && (!ret))
 815                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
 816 }
 817
 818 static ssize_t applesmc_key_count_show(struct device *dev,
 819                                 struct device_attribute *attr, char *sysfsbuf)
 820 {
 821         int ret;
 822         u8 buffer[4];
 823         u32 count;
 824
 825         mutex_lock(&applesmc_lock);
 826
 827         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
 828         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
 829                                                 ((u32)buffer[2]<<8) + buffer[3];
 830
 831         mutex_unlock(&applesmc_lock);
 832         if (ret)
 833                 return ret;
 834         else
 835                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 836 }
 837
 838 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
 839                                 struct device_attribute *attr, char *sysfsbuf)
 840 {
 841         char key[5];
 842         char info[6];
 843         int ret;
 844
 845         mutex_lock(&applesmc_lock);
 846
 847         ret = applesmc_get_key_at_index(key_at_index, key);
 848
 849         if (ret || !key[0]) {
 850                 mutex_unlock(&applesmc_lock);
 851
 852                 return -EINVAL;
 853         }
 854
 855         ret = applesmc_get_key_type(key, info);
 856
 857         if (ret) {
 858                 mutex_unlock(&applesmc_lock);
 859
 860                 return ret;
 861         }
 862
 863         /*
 864          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
 865          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
 866          */
 867         ret = applesmc_read_key(key, sysfsbuf, info[0]);
 868
 869         mutex_unlock(&applesmc_lock);
 870
 871         if (!ret) {
 872                 return info[0];
 873         } else {
 874                 return ret;
 875         }
 876 }
 877
 878 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
 879                                 struct device_attribute *attr, char *sysfsbuf)
 880 {
 881         char key[5];
 882         char info[6];
 883         int ret;
 884
 885         mutex_lock(&applesmc_lock);
 886
 887         ret = applesmc_get_key_at_index(key_at_index, key);
 888
 889         if (ret || !key[0]) {
 890                 mutex_unlock(&applesmc_lock);
 891
 892                 return -EINVAL;
 893         }
 894
 895         ret = applesmc_get_key_type(key, info);
 896
 897         mutex_unlock(&applesmc_lock);
 898
 899         if (!ret)
 900                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
 901         else
 902                 return ret;
 903 }
 904
 905 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
 906                                 struct device_attribute *attr, char *sysfsbuf)
 907 {
 908         char key[5];
 909         char info[6];
 910         int ret;
 911
 912         mutex_lock(&applesmc_lock);
 913
 914         ret = applesmc_get_key_at_index(key_at_index, key);
 915
 916         if (ret || !key[0]) {
 917                 mutex_unlock(&applesmc_lock);
 918
 919                 return -EINVAL;
 920         }
 921
 922         ret = applesmc_get_key_type(key, info);
 923
 924         mutex_unlock(&applesmc_lock);
 925
 926         if (!ret)
 927                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
 928         else
 929                 return ret;
 930 }
 931
 932 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
 933                                 struct device_attribute *attr, char *sysfsbuf)
 934 {
 935         char key[5];
 936         int ret;
 937
 938         mutex_lock(&applesmc_lock);
 939
 940         ret = applesmc_get_key_at_index(key_at_index, key);
 941
 942         mutex_unlock(&applesmc_lock);
 943
 944         if (!ret && key[0])
 945                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
 946         else
 947                 return -EINVAL;
 948 }
 949
 950 static ssize_t applesmc_key_at_index_show(struct device *dev,
 951                                 struct device_attribute *attr, char *sysfsbuf)
 952 {
 953         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
 954 }
 955
 956 static ssize_t applesmc_key_at_index_store(struct device *dev,
 957         struct device_attribute *attr, const char *sysfsbuf, size_t count)
 958 {
 959         mutex_lock(&applesmc_lock);
 960
 961         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
 962
 963         mutex_unlock(&applesmc_lock);
 964
 965         return count;
 966 }
 967
 968 static struct led_classdev applesmc_backlight = {
 969         .name                   = "smc::kbd_backlight",
 970         .default_trigger        = "nand-disk",
 971         .brightness_set         = applesmc_brightness_set,
 972 };
 973
 974 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
 975
 976 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
 977 static DEVICE_ATTR(calibrate, 0644,
 978                         applesmc_calibrate_show, applesmc_calibrate_store);
 979
 980 static struct attribute *accelerometer_attributes[] = {
 981         &dev_attr_position.attr,
 982         &dev_attr_calibrate.attr,
 983         NULL
 984 };
 985
 986 static const struct attribute_group accelerometer_attributes_group =
 987         { .attrs = accelerometer_attributes };
 988
 989 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
 990
 991 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
 992 static DEVICE_ATTR(key_at_index, 0644,
 993                 applesmc_key_at_index_show, applesmc_key_at_index_store);
 994 static DEVICE_ATTR(key_at_index_name, 0444,
 995                                         applesmc_key_at_index_name_show, NULL);
 996 static DEVICE_ATTR(key_at_index_type, 0444,
 997                                         applesmc_key_at_index_type_show, NULL);
 998 static DEVICE_ATTR(key_at_index_data_length, 0444,
 999                                 applesmc_key_at_index_data_length_show, NULL);
1000 static DEVICE_ATTR(key_at_index_data, 0444,
1001                                 applesmc_key_at_index_read_show, NULL);
1002
1003 static struct attribute *key_enumeration_attributes[] = {
1004         &dev_attr_key_count.attr,
1005         &dev_attr_key_at_index.attr,
1006         &dev_attr_key_at_index_name.attr,
1007         &dev_attr_key_at_index_type.attr,
1008         &dev_attr_key_at_index_data_length.attr,
1009         &dev_attr_key_at_index_data.attr,
1010         NULL
1011 };
1012
1013 static const struct attribute_group key_enumeration_group =
1014         { .attrs = key_enumeration_attributes };
1015
1016 /*
1017  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
1018  *  - show actual speed
1019  *  - show/store minimum speed
1020  *  - show maximum speed
1021  *  - show safe speed
1022  *  - show/store target speed
1023  *  - show/store manual mode
1024  */
1025 #define sysfs_fan_speeds_offset(offset) \
1026 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
1027                         applesmc_show_fan_speed, NULL, 0, offset-1); \
1028 \
1029 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
1030         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
1031 \
1032 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
1033                         applesmc_show_fan_speed, NULL, 2, offset-1); \
1034 \
1035 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
1036                         applesmc_show_fan_speed, NULL, 3, offset-1); \
1037 \
1038 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
1039         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
1040 \
1041 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
1042         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
1043 \
1044 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
1045         applesmc_show_fan_position, NULL, offset-1); \
1046 \
1047 static struct attribute *fan##offset##_attributes[] = { \
1048         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
1049         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
1050         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
1051         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
1052         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
1053         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
1054         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
1055         NULL \
1056 };
1057
1058 /*
1059  * Create the needed functions for each fan using the macro defined above
1060  * (4 fans are supported)
1061  */
1062 sysfs_fan_speeds_offset(1);
1063 sysfs_fan_speeds_offset(2);
1064 sysfs_fan_speeds_offset(3);
1065 sysfs_fan_speeds_offset(4);
1066
1067 static const struct attribute_group fan_attribute_groups[] = {
1068         { .attrs = fan1_attributes },
1069         { .attrs = fan2_attributes },
1070         { .attrs = fan3_attributes },
1071         { .attrs = fan4_attributes },
1072 };
1073
1074 /*
1075  * Temperature sensors sysfs entries.
1076  */
1077 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1078                                         applesmc_show_temperature, NULL, 0);
1079 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1080                                         applesmc_show_temperature, NULL, 1);
1081 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1082                                         applesmc_show_temperature, NULL, 2);
1083 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1084                                         applesmc_show_temperature, NULL, 3);
1085 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1086                                         applesmc_show_temperature, NULL, 4);
1087 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1088                                         applesmc_show_temperature, NULL, 5);
1089 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1090                                         applesmc_show_temperature, NULL, 6);
1091 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1092                                         applesmc_show_temperature, NULL, 7);
1093 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1094                                         applesmc_show_temperature, NULL, 8);
1095 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1096                                         applesmc_show_temperature, NULL, 9);
1097 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1098                                         applesmc_show_temperature, NULL, 10);
1099 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1100                                         applesmc_show_temperature, NULL, 11);
1101 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1102                                         applesmc_show_temperature, NULL, 12);
1103 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1104                                         applesmc_show_temperature, NULL, 13);
1105 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1106                                         applesmc_show_temperature, NULL, 14);
1107 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1108                                         applesmc_show_temperature, NULL, 15);
1109 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1110                                         applesmc_show_temperature, NULL, 16);
1111 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1112                                         applesmc_show_temperature, NULL, 17);
1113 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1114                                         applesmc_show_temperature, NULL, 18);
1115 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1116                                         applesmc_show_temperature, NULL, 19);
1117 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1118                                         applesmc_show_temperature, NULL, 20);
1119 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1120                                         applesmc_show_temperature, NULL, 21);
1121 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1122                                         applesmc_show_temperature, NULL, 22);
1123 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1124                                         applesmc_show_temperature, NULL, 23);
1125 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1126                                         applesmc_show_temperature, NULL, 24);
1127 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1128                                         applesmc_show_temperature, NULL, 25);
1129 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1130                                         applesmc_show_temperature, NULL, 26);
1131 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1132                                         applesmc_show_temperature, NULL, 27);
1133 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1134                                         applesmc_show_temperature, NULL, 28);
1135 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1136                                         applesmc_show_temperature, NULL, 29);
1137 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1138                                         applesmc_show_temperature, NULL, 30);
1139 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1140                                         applesmc_show_temperature, NULL, 31);
1141 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1142                                         applesmc_show_temperature, NULL, 32);
1143 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1144                                         applesmc_show_temperature, NULL, 33);
1145 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1146                                         applesmc_show_temperature, NULL, 34);
1147
1148 static struct attribute *temperature_attributes[] = {
1149         &sensor_dev_attr_temp1_input.dev_attr.attr,
1150         &sensor_dev_attr_temp2_input.dev_attr.attr,
1151         &sensor_dev_attr_temp3_input.dev_attr.attr,
1152         &sensor_dev_attr_temp4_input.dev_attr.attr,
1153         &sensor_dev_attr_temp5_input.dev_attr.attr,
1154         &sensor_dev_attr_temp6_input.dev_attr.attr,
1155         &sensor_dev_attr_temp7_input.dev_attr.attr,
1156         &sensor_dev_attr_temp8_input.dev_attr.attr,
1157         &sensor_dev_attr_temp9_input.dev_attr.attr,
1158         &sensor_dev_attr_temp10_input.dev_attr.attr,
1159         &sensor_dev_attr_temp11_input.dev_attr.attr,
1160         &sensor_dev_attr_temp12_input.dev_attr.attr,
1161         &sensor_dev_attr_temp13_input.dev_attr.attr,
1162         &sensor_dev_attr_temp14_input.dev_attr.attr,
1163         &sensor_dev_attr_temp15_input.dev_attr.attr,
1164         &sensor_dev_attr_temp16_input.dev_attr.attr,
1165         &sensor_dev_attr_temp17_input.dev_attr.attr,
1166         &sensor_dev_attr_temp18_input.dev_attr.attr,
1167         &sensor_dev_attr_temp19_input.dev_attr.attr,
1168         &sensor_dev_attr_temp20_input.dev_attr.attr,
1169         &sensor_dev_attr_temp21_input.dev_attr.attr,
1170         &sensor_dev_attr_temp22_input.dev_attr.attr,
1171         &sensor_dev_attr_temp23_input.dev_attr.attr,
1172         &sensor_dev_attr_temp24_input.dev_attr.attr,
1173         &sensor_dev_attr_temp25_input.dev_attr.attr,
1174         &sensor_dev_attr_temp26_input.dev_attr.attr,
1175         &sensor_dev_attr_temp27_input.dev_attr.attr,
1176         &sensor_dev_attr_temp28_input.dev_attr.attr,
1177         &sensor_dev_attr_temp29_input.dev_attr.attr,
1178         &sensor_dev_attr_temp30_input.dev_attr.attr,
1179         &sensor_dev_attr_temp31_input.dev_attr.attr,
1180         &sensor_dev_attr_temp32_input.dev_attr.attr,
1181         &sensor_dev_attr_temp33_input.dev_attr.attr,
1182         &sensor_dev_attr_temp34_input.dev_attr.attr,
1183         &sensor_dev_attr_temp35_input.dev_attr.attr,
1184         NULL
1185 };
1186
1187 static const struct attribute_group temperature_attributes_group =
1188         { .attrs = temperature_attributes };
1189
1190 /* Module stuff */
1191
1192 /*
1193  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1194  */
1195 static int applesmc_dmi_match(const struct dmi_system_id *id)
1196 {
1197         int i = 0;
1198         struct dmi_match_data* dmi_data = id->driver_data;
1199         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1200         applesmc_accelerometer = dmi_data->accelerometer;
1201         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1202                                 applesmc_accelerometer ? "with" : "without");
1203         applesmc_light = dmi_data->light;
1204         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1205                                         applesmc_light ? "with" : "without");
1206
1207         applesmc_temperature_set =  dmi_data->temperature_set;
1208         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1209                 i++;
1210         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1211         return 1;
1212 }
1213
1214 /* Create accelerometer ressources */
1215 static int applesmc_create_accelerometer(void)
1216 {
1217         struct input_dev *idev;
1218         int ret;
1219
1220         ret = sysfs_create_group(&pdev->dev.kobj,
1221                                         &accelerometer_attributes_group);
1222         if (ret)
1223                 goto out;
1224
1225         applesmc_idev = input_allocate_polled_device();
1226         if (!applesmc_idev) {
1227                 ret = -ENOMEM;
1228                 goto out_sysfs;
1229         }
1230
1231         applesmc_idev->poll = applesmc_idev_poll;
1232         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1233
1234         /* initial calibrate for the input device */
1235         applesmc_calibrate();
1236
1237         /* initialize the input device */
1238         idev = applesmc_idev->input;
1239         idev->name = "applesmc";
1240         idev->id.bustype = BUS_HOST;
1241         idev->dev.parent = &pdev->dev;
1242         idev->evbit[0] = BIT_MASK(EV_ABS);
1243         input_set_abs_params(idev, ABS_X,
1244                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1245         input_set_abs_params(idev, ABS_Y,
1246                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1247
1248         ret = input_register_polled_device(applesmc_idev);
1249         if (ret)
1250                 goto out_idev;
1251
1252         return 0;
1253
1254 out_idev:
1255         input_free_polled_device(applesmc_idev);
1256
1257 out_sysfs:
1258         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1259
1260 out:
1261         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1262         return ret;
1263 }
1264
1265 /* Release all ressources used by the accelerometer */
1266 static void applesmc_release_accelerometer(void)
1267 {
1268         input_unregister_polled_device(applesmc_idev);
1269         input_free_polled_device(applesmc_idev);
1270         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1271 }
1272
1273 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1274 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1275         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1276 /* MacBook2: accelerometer and temperature set 1 */
1277         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1278 /* MacBook: accelerometer and temperature set 2 */
1279         { .accelerometer = 1, .light = 0, .temperature_set = 2 },
1280 /* MacMini: temperature set 3 */
1281         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1282 /* MacPro: temperature set 4 */
1283         { .accelerometer = 0, .light = 0, .temperature_set = 4 },
1284 /* iMac: temperature set 5 */
1285         { .accelerometer = 0, .light = 0, .temperature_set = 5 },
1286 /* MacBook3, MacBook4: accelerometer and temperature set 6 */
1287         { .accelerometer = 1, .light = 0, .temperature_set = 6 },
1288 /* MacBook Air: accelerometer, backlight and temperature set 7 */
1289         { .accelerometer = 1, .light = 1, .temperature_set = 7 },
1290 /* MacBook Pro 4: accelerometer, backlight and temperature set 8 */
1291         { .accelerometer = 1, .light = 1, .temperature_set = 8 },
1292 /* MacBook Pro 3: accelerometer, backlight and temperature set 9 */
1293         { .accelerometer = 1, .light = 1, .temperature_set = 9 },
1294 /* iMac 5: light sensor only, temperature set 10 */
1295         { .accelerometer = 0, .light = 0, .temperature_set = 10 },
1296 /* MacBook 5: accelerometer, backlight and temperature set 11 */
1297         { .accelerometer = 1, .light = 1, .temperature_set = 11 },
1298 /* MacBook Pro 5: accelerometer, backlight and temperature set 12 */
1299         { .accelerometer = 1, .light = 1, .temperature_set = 12 },
1300 /* iMac 8: light sensor only, temperature set 13 */
1301         { .accelerometer = 0, .light = 0, .temperature_set = 13 },
1302 /* iMac 6: light sensor only, temperature set 14 */
1303         { .accelerometer = 0, .light = 0, .temperature_set = 14 },
1304 };
1305
1306 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1307  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1308 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1309         { applesmc_dmi_match, "Apple MacBook Air", {
1310           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1311           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
1312                 &applesmc_dmi_data[7]},
1313         { applesmc_dmi_match, "Apple MacBook Pro 5", {
1314           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1315           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5") },
1316                 &applesmc_dmi_data[12]},
1317         { applesmc_dmi_match, "Apple MacBook Pro 4", {
1318           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1319           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro4") },
1320                 &applesmc_dmi_data[8]},
1321         { applesmc_dmi_match, "Apple MacBook Pro 3", {
1322           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1323           DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3") },
1324                 &applesmc_dmi_data[9]},
1325         { applesmc_dmi_match, "Apple MacBook Pro", {
1326           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1327           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1328                 &applesmc_dmi_data[0]},
1329         { applesmc_dmi_match, "Apple MacBook (v2)", {
1330           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1331           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook2") },
1332                 &applesmc_dmi_data[1]},
1333         { applesmc_dmi_match, "Apple MacBook (v3)", {
1334           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1335           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook3") },
1336                 &applesmc_dmi_data[6]},
1337         { applesmc_dmi_match, "Apple MacBook 4", {
1338           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1339           DMI_MATCH(DMI_PRODUCT_NAME, "MacBook4") },
1340                 &applesmc_dmi_data[6]},
1341         { applesmc_dmi_match, "Apple MacBook 5", {
1342           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1343           DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5") },
1344                 &applesmc_dmi_data[11]},
1345         { applesmc_dmi_match, "Apple MacBook", {
1346           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1347           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1348                 &applesmc_dmi_data[2]},
1349         { applesmc_dmi_match, "Apple Macmini", {
1350           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1351           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1352                 &applesmc_dmi_data[3]},
1353         { applesmc_dmi_match, "Apple MacPro2", {
1354           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1355           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1356                 &applesmc_dmi_data[4]},
1357         { applesmc_dmi_match, "Apple iMac 8", {
1358           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1359           DMI_MATCH(DMI_PRODUCT_NAME, "iMac8") },
1360                 &applesmc_dmi_data[13]},
1361         { applesmc_dmi_match, "Apple iMac 6", {
1362           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1363           DMI_MATCH(DMI_PRODUCT_NAME, "iMac6") },
1364                 &applesmc_dmi_data[14]},
1365         { applesmc_dmi_match, "Apple iMac 5", {
1366           DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1367           DMI_MATCH(DMI_PRODUCT_NAME, "iMac5") },
1368                 &applesmc_dmi_data[10]},
1369         { applesmc_dmi_match, "Apple iMac", {
1370           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1371           DMI_MATCH(DMI_PRODUCT_NAME,"iMac") },
1372                 &applesmc_dmi_data[5]},
1373         { .ident = NULL }
1374 };
1375
1376 static int __init applesmc_init(void)
1377 {
1378         int ret;
1379         int count;
1380         int i;
1381
1382         if (!dmi_check_system(applesmc_whitelist)) {
1383                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1384                 ret = -ENODEV;
1385                 goto out;
1386         }
1387
1388         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1389                                                                 "applesmc")) {
1390                 ret = -ENXIO;
1391                 goto out;
1392         }
1393
1394         ret = platform_driver_register(&applesmc_driver);
1395         if (ret)
1396                 goto out_region;
1397
1398         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1399                                                NULL, 0);
1400         if (IS_ERR(pdev)) {
1401                 ret = PTR_ERR(pdev);
1402                 goto out_driver;
1403         }
1404
1405         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1406         if (ret)
1407                 goto out_device;
1408
1409         /* Create key enumeration sysfs files */
1410         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1411         if (ret)
1412                 goto out_name;
1413
1414         /* create fan files */
1415         count = applesmc_get_fan_count();
1416         if (count < 0) {
1417                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1418         } else {
1419                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1420
1421                 switch (count) {
1422                 default:
1423                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1424                                         " but at most 4 fans are supported"
1425                                                 " by the driver.\n");
1426                 case 4:
1427                         ret = sysfs_create_group(&pdev->dev.kobj,
1428                                                  &fan_attribute_groups[3]);
1429                         if (ret)
1430                                 goto out_key_enumeration;
1431                 case 3:
1432                         ret = sysfs_create_group(&pdev->dev.kobj,
1433                                                  &fan_attribute_groups[2]);
1434                         if (ret)
1435                                 goto out_key_enumeration;
1436                 case 2:
1437                         ret = sysfs_create_group(&pdev->dev.kobj,
1438                                                  &fan_attribute_groups[1]);
1439                         if (ret)
1440                                 goto out_key_enumeration;
1441                 case 1:
1442                         ret = sysfs_create_group(&pdev->dev.kobj,
1443                                                  &fan_attribute_groups[0]);
1444                         if (ret)
1445                                 goto out_fan_1;
1446                 case 0:
1447                         ;
1448                 }
1449         }
1450
1451         for (i = 0;
1452              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1453              i++) {
1454                 if (temperature_attributes[i] == NULL) {
1455                         printk(KERN_ERR "applesmc: More temperature sensors "
1456                                 "in temperature_sensors_sets (at least %i)"
1457                                 "than available sysfs files in "
1458                                 "temperature_attributes (%i), please report "
1459                                 "this bug.\n", i, i-1);
1460                         goto out_temperature;
1461                 }
1462                 ret = sysfs_create_file(&pdev->dev.kobj,
1463                                                 temperature_attributes[i]);
1464                 if (ret)
1465                         goto out_temperature;
1466         }
1467
1468         if (applesmc_accelerometer) {
1469                 ret = applesmc_create_accelerometer();
1470                 if (ret)
1471                         goto out_temperature;
1472         }
1473
1474         if (applesmc_light) {
1475                 /* Add light sensor file */
1476                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1477                 if (ret)
1478                         goto out_accelerometer;
1479
1480                 /* Create the workqueue */
1481                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1482                 if (!applesmc_led_wq) {
1483                         ret = -ENOMEM;
1484                         goto out_light_sysfs;
1485                 }
1486
1487                 /* register as a led device */
1488                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1489                 if (ret < 0)
1490                         goto out_light_wq;
1491         }
1492
1493         hwmon_dev = hwmon_device_register(&pdev->dev);
1494         if (IS_ERR(hwmon_dev)) {
1495                 ret = PTR_ERR(hwmon_dev);
1496                 goto out_light_ledclass;
1497         }
1498
1499         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1500
1501         return 0;
1502
1503 out_light_ledclass:
1504         if (applesmc_light)
1505                 led_classdev_unregister(&applesmc_backlight);
1506 out_light_wq:
1507         if (applesmc_light)
1508                 destroy_workqueue(applesmc_led_wq);
1509 out_light_sysfs:
1510         if (applesmc_light)
1511                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1512 out_accelerometer:
1513         if (applesmc_accelerometer)
1514                 applesmc_release_accelerometer();
1515 out_temperature:
1516         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1517         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1518 out_fan_1:
1519         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1520 out_key_enumeration:
1521         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1522 out_name:
1523         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1524 out_device:
1525         platform_device_unregister(pdev);
1526 out_driver:
1527         platform_driver_unregister(&applesmc_driver);
1528 out_region:
1529         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1530 out:
1531         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1532         return ret;
1533 }
1534
1535 static void __exit applesmc_exit(void)
1536 {
1537         hwmon_device_unregister(hwmon_dev);
1538         if (applesmc_light) {
1539                 led_classdev_unregister(&applesmc_backlight);
1540                 destroy_workqueue(applesmc_led_wq);
1541                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1542         }
1543         if (applesmc_accelerometer)
1544                 applesmc_release_accelerometer();
1545         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1546         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1547         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1548         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1549         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1550         platform_device_unregister(pdev);
1551         platform_driver_unregister(&applesmc_driver);
1552         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1553
1554         printk(KERN_INFO "applesmc: driver unloaded.\n");
1555 }
1556
1557 module_init(applesmc_init);
1558 module_exit(applesmc_exit);
1559
1560 MODULE_AUTHOR("Nicolas Boichat");
1561 MODULE_DESCRIPTION("Apple SMC");
1562 MODULE_LICENSE("GPL v2");