drivers/hwmon/applesmc.c

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