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.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 bytes) */ 61#define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6 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 * First set for Macbook(Pro), second for Macmini. 83 */ 84static const char* temperature_sensors_sets[][13] = { 85 { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H", 86 "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL }, 87 { "TC0D", "TC0P", NULL } 88}; 89 90/* List of keys used to read/write fan speeds */ 91static const char* fan_speed_keys[] = { 92 FAN_ACTUAL_SPEED, 93 FAN_MIN_SPEED, 94 FAN_MAX_SPEED, 95 FAN_SAFE_SPEED, 96 FAN_TARGET_SPEED 97}; 98 99#define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ 100#define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ 101 102#define APPLESMC_POLL_PERIOD (HZ/20) /* poll for input every 1/20s */ 103#define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ 104#define APPLESMC_INPUT_FLAT 4 105 106#define SENSOR_X 0 107#define SENSOR_Y 1 108#define SENSOR_Z 2 109 110/* Structure to be passed to DMI_MATCH function */ 111struct dmi_match_data { 112/* Indicates whether this computer has an accelerometer. */ 113 int accelerometer; 114/* Indicates whether this computer has light sensors and keyboard backlight. */ 115 int light; 116/* Indicates which temperature sensors set to use. */ 117 int temperature_set; 118}; 119 120static const int debug; 121static struct platform_device *pdev; 122static s16 rest_x; 123static s16 rest_y; 124static struct timer_list applesmc_timer; 125static struct input_dev *applesmc_idev; 126static struct class_device *hwmon_class_dev; 127 128/* Indicates whether this computer has an accelerometer. */ 129static unsigned int applesmc_accelerometer; 130 131/* Indicates whether this computer has light sensors and keyboard backlight. */ 132static unsigned int applesmc_light; 133 134/* Indicates which temperature sensors set to use. */ 135static unsigned int applesmc_temperature_set; 136 137static struct mutex applesmc_lock; 138 139/* 140 * Last index written to key_at_index sysfs file, and value to use for all other 141 * key_at_index_* sysfs files. 142 */ 143static unsigned int key_at_index; 144 145static struct workqueue_struct *applesmc_led_wq; 146 147/* 148 * __wait_status - Wait up to 2ms for the status port to get a certain value 149 * (masked with 0x0f), returning zero if the value is obtained. Callers must 150 * hold applesmc_lock. 151 */ 152static int __wait_status(u8 val) 153{ 154 unsigned int i; 155 156 val = val & APPLESMC_STATUS_MASK; 157 158 for (i = 0; i < 200; i++) { 159 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) { 160 if (debug) 161 printk(KERN_DEBUG 162 "Waited %d us for status %x\n", 163 i*10, val); 164 return 0; 165 } 166 udelay(10); 167 } 168 169 printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n", 170 val, inb(APPLESMC_CMD_PORT)); 171 172 return -EIO; 173} 174 175/* 176 * applesmc_read_key - reads len bytes from a given key, and put them in buffer. 177 * Returns zero on success or a negative error on failure. Callers must 178 * hold applesmc_lock. 179 */ 180static int applesmc_read_key(const char* key, u8* buffer, u8 len) 181{ 182 int i; 183 184 if (len > APPLESMC_MAX_DATA_LENGTH) { 185 printk(KERN_ERR "applesmc_read_key: cannot read more than " 186 "%d bytes\n", APPLESMC_MAX_DATA_LENGTH); 187 return -EINVAL; 188 } 189 190 outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT); 191 if (__wait_status(0x0c)) 192 return -EIO; 193 194 for (i = 0; i < 4; i++) { 195 outb(key[i], APPLESMC_DATA_PORT); 196 if (__wait_status(0x04)) 197 return -EIO; 198 } 199 if (debug) 200 printk(KERN_DEBUG "<%s", key); 201 202 outb(len, APPLESMC_DATA_PORT); 203 if (debug) 204 printk(KERN_DEBUG ">%x", len); 205 206 for (i = 0; i < len; i++) { 207 if (__wait_status(0x05)) 208 return -EIO; 209 buffer[i] = inb(APPLESMC_DATA_PORT); 210 if (debug) 211 printk(KERN_DEBUG "<%x", buffer[i]); 212 } 213 if (debug) 214 printk(KERN_DEBUG "\n"); 215 216 return 0; 217} 218 219/* 220 * applesmc_write_key - writes len bytes from buffer to a given key. 221 * Returns zero on success or a negative error on failure. Callers must 222 * hold applesmc_lock. 223 */ 224static int applesmc_write_key(const char* key, u8* buffer, u8 len) 225{ 226 int i; 227 228 if (len > APPLESMC_MAX_DATA_LENGTH) { 229 printk(KERN_ERR "applesmc_write_key: cannot write more than " 230 "%d bytes\n", APPLESMC_MAX_DATA_LENGTH); 231 return -EINVAL; 232 } 233 234 outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT); 235 if (__wait_status(0x0c)) 236 return -EIO; 237 238 for (i = 0; i < 4; i++) { 239 outb(key[i], APPLESMC_DATA_PORT); 240 if (__wait_status(0x04)) 241 return -EIO; 242 } 243 244 outb(len, APPLESMC_DATA_PORT); 245 246 for (i = 0; i < len; i++) { 247 if (__wait_status(0x04)) 248 return -EIO; 249 outb(buffer[i], APPLESMC_DATA_PORT); 250 } 251 252 return 0; 253} 254 255/* 256 * applesmc_get_key_at_index - get key at index, and put the result in key 257 * (char[6]). Returns zero on success or a negative error on failure. Callers 258 * must hold applesmc_lock. 259 */ 260static int applesmc_get_key_at_index(int index, char* key) 261{ 262 int i; 263 u8 readkey[4]; 264 readkey[0] = index >> 24; 265 readkey[1] = index >> 16; 266 readkey[2] = index >> 8; 267 readkey[3] = index; 268 269 outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT); 270 if (__wait_status(0x0c)) 271 return -EIO; 272 273 for (i = 0; i < 4; i++) { 274 outb(readkey[i], APPLESMC_DATA_PORT); 275 if (__wait_status(0x04)) 276 return -EIO; 277 } 278 279 outb(4, APPLESMC_DATA_PORT); 280 281 for (i = 0; i < 4; i++) { 282 if (__wait_status(0x05)) 283 return -EIO; 284 key[i] = inb(APPLESMC_DATA_PORT); 285 } 286 key[4] = 0; 287 288 return 0; 289} 290 291/* 292 * applesmc_get_key_type - get key type, and put the result in type (char[6]). 293 * Returns zero on success or a negative error on failure. Callers must 294 * hold applesmc_lock. 295 */ 296static int applesmc_get_key_type(char* key, char* type) 297{ 298 int i; 299 300 outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT); 301 if (__wait_status(0x0c)) 302 return -EIO; 303 304 for (i = 0; i < 4; i++) { 305 outb(key[i], APPLESMC_DATA_PORT); 306 if (__wait_status(0x04)) 307 return -EIO; 308 } 309 310 outb(5, APPLESMC_DATA_PORT); 311 312 for (i = 0; i < 6; i++) { 313 if (__wait_status(0x05)) 314 return -EIO; 315 type[i] = inb(APPLESMC_DATA_PORT); 316 } 317 type[5] = 0; 318 319 return 0; 320} 321 322/* 323 * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must 324 * hold applesmc_lock. 325 */ 326static int applesmc_read_motion_sensor(int index, s16* value) 327{ 328 u8 buffer[2]; 329 int ret; 330 331 switch (index) { 332 case SENSOR_X: 333 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2); 334 break; 335 case SENSOR_Y: 336 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2); 337 break; 338 case SENSOR_Z: 339 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2); 340 break; 341 default: 342 ret = -EINVAL; 343 } 344 345 *value = ((s16)buffer[0] << 8) | buffer[1]; 346 347 return ret; 348} 349 350/* 351 * applesmc_device_init - initialize the accelerometer. Returns zero on success 352 * and negative error code on failure. Can sleep. 353 */ 354static int applesmc_device_init(void) 355{ 356 int total, ret = -ENXIO; 357 u8 buffer[2]; 358 359 if (!applesmc_accelerometer) 360 return 0; 361 362 mutex_lock(&applesmc_lock); 363 364 for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { 365 if (debug) 366 printk(KERN_DEBUG "applesmc try %d\n", total); 367 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && 368 (buffer[0] != 0x00 || buffer[1] != 0x00)) { 369 if (total == INIT_TIMEOUT_MSECS) { 370 printk(KERN_DEBUG "applesmc: device has" 371 " already been initialized" 372 " (0x%02x, 0x%02x).\n", 373 buffer[0], buffer[1]); 374 } else { 375 printk(KERN_DEBUG "applesmc: device" 376 " successfully initialized" 377 " (0x%02x, 0x%02x).\n", 378 buffer[0], buffer[1]); 379 } 380 ret = 0; 381 goto out; 382 } 383 buffer[0] = 0xe0; 384 buffer[1] = 0x00; 385 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); 386 msleep(INIT_WAIT_MSECS); 387 } 388 389 printk(KERN_WARNING "applesmc: failed to init the device\n"); 390 391out: 392 mutex_unlock(&applesmc_lock); 393 return ret; 394} 395 396/* 397 * applesmc_get_fan_count - get the number of fans. Callers must NOT hold 398 * applesmc_lock. 399 */ 400static int applesmc_get_fan_count(void) 401{ 402 int ret; 403 u8 buffer[1]; 404 405 mutex_lock(&applesmc_lock); 406 407 ret = applesmc_read_key(FANS_COUNT, buffer, 1); 408 409 mutex_unlock(&applesmc_lock); 410 if (ret) 411 return ret; 412 else 413 return buffer[0]; 414} 415 416/* Device model stuff */ 417static int applesmc_probe(struct platform_device *dev) 418{ 419 int ret; 420 421 ret = applesmc_device_init(); 422 if (ret) 423 return ret; 424 425 printk(KERN_INFO "applesmc: device successfully initialized.\n"); 426 return 0; 427} 428 429static int applesmc_resume(struct platform_device *dev) 430{ 431 return applesmc_device_init(); 432} 433 434static struct platform_driver applesmc_driver = { 435 .probe = applesmc_probe, 436 .resume = applesmc_resume, 437 .driver = { 438 .name = "applesmc", 439 .owner = THIS_MODULE, 440 }, 441}; 442 443/* 444 * applesmc_calibrate - Set our "resting" values. Callers must 445 * hold applesmc_lock. 446 */ 447static void applesmc_calibrate(void) 448{ 449 applesmc_read_motion_sensor(SENSOR_X, &rest_x); 450 applesmc_read_motion_sensor(SENSOR_Y, &rest_y); 451 rest_x = -rest_x; 452} 453 454static int applesmc_idev_open(struct input_dev *dev) 455{ 456 add_timer(&applesmc_timer); 457 458 return 0; 459} 460 461static void applesmc_idev_close(struct input_dev *dev) 462{ 463 del_timer_sync(&applesmc_timer); 464} 465 466static void applesmc_idev_poll(unsigned long unused) 467{ 468 s16 x, y; 469 470 /* Cannot sleep. Try nonblockingly. If we fail, try again later. */ 471 if (!mutex_trylock(&applesmc_lock)) { 472 mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD); 473 return; 474 } 475 476 if (applesmc_read_motion_sensor(SENSOR_X, &x)) 477 goto out; 478 if (applesmc_read_motion_sensor(SENSOR_Y, &y)) 479 goto out; 480 481 x = -x; 482 input_report_abs(applesmc_idev, ABS_X, x - rest_x); 483 input_report_abs(applesmc_idev, ABS_Y, y - rest_y); 484 input_sync(applesmc_idev); 485 486out: 487 mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD); 488 489 mutex_unlock(&applesmc_lock); 490} 491 492/* Sysfs Files */ 493 494static ssize_t applesmc_name_show(struct device *dev, 495 struct device_attribute *attr, char *buf) 496{ 497 return snprintf(buf, PAGE_SIZE, "applesmc\n"); 498} 499 500static ssize_t applesmc_position_show(struct device *dev, 501 struct device_attribute *attr, char *buf) 502{ 503 int ret; 504 s16 x, y, z; 505 506 mutex_lock(&applesmc_lock); 507 508 ret = applesmc_read_motion_sensor(SENSOR_X, &x); 509 if (ret) 510 goto out; 511 ret = applesmc_read_motion_sensor(SENSOR_Y, &y); 512 if (ret) 513 goto out; 514 ret = applesmc_read_motion_sensor(SENSOR_Z, &z); 515 if (ret) 516 goto out; 517 518out: 519 mutex_unlock(&applesmc_lock); 520 if (ret) 521 return ret; 522 else 523 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); 524} 525 526static ssize_t applesmc_light_show(struct device *dev, 527 struct device_attribute *attr, char *sysfsbuf) 528{ 529 int ret; 530 u8 left = 0, right = 0; 531 u8 buffer[6]; 532 533 mutex_lock(&applesmc_lock); 534 535 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6); 536 left = buffer[2]; 537 if (ret) 538 goto out; 539 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6); 540 right = buffer[2]; 541 542out: 543 mutex_unlock(&applesmc_lock); 544 if (ret) 545 return ret; 546 else 547 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); 548} 549 550/* Displays degree Celsius * 1000 */ 551static ssize_t applesmc_show_temperature(struct device *dev, 552 struct device_attribute *devattr, char *sysfsbuf) 553{ 554 int ret; 555 u8 buffer[2]; 556 unsigned int temp; 557 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 558 const char* key = 559 temperature_sensors_sets[applesmc_temperature_set][attr->index]; 560 561 mutex_lock(&applesmc_lock); 562 563 ret = applesmc_read_key(key, buffer, 2); 564 temp = buffer[0]*1000; 565 temp += (buffer[1] >> 6) * 250; 566 567 mutex_unlock(&applesmc_lock); 568 569 if (ret) 570 return ret; 571 else 572 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp); 573} 574 575static ssize_t applesmc_show_fan_speed(struct device *dev, 576 struct device_attribute *attr, char *sysfsbuf) 577{ 578 int ret; 579 unsigned int speed = 0; 580 char newkey[5]; 581 u8 buffer[2]; 582 struct sensor_device_attribute_2 *sensor_attr = 583 to_sensor_dev_attr_2(attr); 584 585 newkey[0] = fan_speed_keys[sensor_attr->nr][0]; 586 newkey[1] = '0' + sensor_attr->index; 587 newkey[2] = fan_speed_keys[sensor_attr->nr][2]; 588 newkey[3] = fan_speed_keys[sensor_attr->nr][3]; 589 newkey[4] = 0; 590 591 mutex_lock(&applesmc_lock); 592 593 ret = applesmc_read_key(newkey, buffer, 2); 594 speed = ((buffer[0] << 8 | buffer[1]) >> 2); 595 596 mutex_unlock(&applesmc_lock); 597 if (ret) 598 return ret; 599 else 600 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); 601} 602 603static ssize_t applesmc_store_fan_speed(struct device *dev, 604 struct device_attribute *attr, 605 const char *sysfsbuf, size_t count) 606{ 607 int ret; 608 u32 speed; 609 char newkey[5]; 610 u8 buffer[2]; 611 struct sensor_device_attribute_2 *sensor_attr = 612 to_sensor_dev_attr_2(attr); 613 614 speed = simple_strtoul(sysfsbuf, NULL, 10); 615 616 if (speed > 0x4000) /* Bigger than a 14-bit value */ 617 return -EINVAL; 618 619 newkey[0] = fan_speed_keys[sensor_attr->nr][0]; 620 newkey[1] = '0' + sensor_attr->index; 621 newkey[2] = fan_speed_keys[sensor_attr->nr][2]; 622 newkey[3] = fan_speed_keys[sensor_attr->nr][3]; 623 newkey[4] = 0; 624 625 mutex_lock(&applesmc_lock); 626 627 buffer[0] = (speed >> 6) & 0xff; 628 buffer[1] = (speed << 2) & 0xff; 629 ret = applesmc_write_key(newkey, buffer, 2); 630 631 mutex_unlock(&applesmc_lock); 632 if (ret) 633 return ret; 634 else 635 return count; 636} 637 638static ssize_t applesmc_show_fan_manual(struct device *dev, 639 struct device_attribute *devattr, char *sysfsbuf) 640{ 641 int ret; 642 u16 manual = 0; 643 u8 buffer[2]; 644 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 645 646 mutex_lock(&applesmc_lock); 647 648 ret = applesmc_read_key(FANS_MANUAL, buffer, 2); 649 manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01; 650 651 mutex_unlock(&applesmc_lock); 652 if (ret) 653 return ret; 654 else 655 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); 656} 657 658static ssize_t applesmc_store_fan_manual(struct device *dev, 659 struct device_attribute *devattr, 660 const char *sysfsbuf, size_t count) 661{ 662 int ret; 663 u8 buffer[2]; 664 u32 input; 665 u16 val; 666 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 667 668 input = simple_strtoul(sysfsbuf, NULL, 10); 669 670 mutex_lock(&applesmc_lock); 671 672 ret = applesmc_read_key(FANS_MANUAL, buffer, 2); 673 val = (buffer[0] << 8 | buffer[1]); 674 if (ret) 675 goto out; 676 677 if (input) 678 val = val | (0x01 << attr->index); 679 else 680 val = val & ~(0x01 << attr->index); 681 682 buffer[0] = (val >> 8) & 0xFF; 683 buffer[1] = val & 0xFF; 684 685 ret = applesmc_write_key(FANS_MANUAL, buffer, 2); 686 687out: 688 mutex_unlock(&applesmc_lock); 689 if (ret) 690 return ret; 691 else 692 return count; 693} 694 695static ssize_t applesmc_show_fan_position(struct device *dev, 696 struct device_attribute *attr, char *sysfsbuf) 697{ 698 int ret; 699 char newkey[5]; 700 u8 buffer[17]; 701 struct sensor_device_attribute_2 *sensor_attr = 702 to_sensor_dev_attr_2(attr); 703 704 newkey[0] = FAN_POSITION[0]; 705 newkey[1] = '0' + sensor_attr->index; 706 newkey[2] = FAN_POSITION[2]; 707 newkey[3] = FAN_POSITION[3]; 708 newkey[4] = 0; 709 710 mutex_lock(&applesmc_lock); 711 712 ret = applesmc_read_key(newkey, buffer, 16); 713 buffer[16] = 0; 714 715 mutex_unlock(&applesmc_lock); 716 if (ret) 717 return ret; 718 else 719 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); 720} 721 722static ssize_t applesmc_calibrate_show(struct device *dev, 723 struct device_attribute *attr, char *sysfsbuf) 724{ 725 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); 726} 727 728static ssize_t applesmc_calibrate_store(struct device *dev, 729 struct device_attribute *attr, const char *sysfsbuf, size_t count) 730{ 731 mutex_lock(&applesmc_lock); 732 applesmc_calibrate(); 733 mutex_unlock(&applesmc_lock); 734 735 return count; 736} 737 738/* Store the next backlight value to be written by the work */ 739static unsigned int backlight_value; 740 741static void applesmc_backlight_set(struct work_struct *work) 742{ 743 u8 buffer[2]; 744 745 mutex_lock(&applesmc_lock); 746 buffer[0] = backlight_value; 747 buffer[1] = 0x00; 748 applesmc_write_key(BACKLIGHT_KEY, buffer, 2); 749 mutex_unlock(&applesmc_lock); 750} 751static DECLARE_WORK(backlight_work, &applesmc_backlight_set); 752 753static void applesmc_brightness_set(struct led_classdev *led_cdev, 754 enum led_brightness value) 755{ 756 int ret; 757 758 backlight_value = value; 759 ret = queue_work(applesmc_led_wq, &backlight_work); 760 761 if (debug && (!ret)) 762 printk(KERN_DEBUG "applesmc: work was already on the queue.\n"); 763} 764 765static ssize_t applesmc_key_count_show(struct device *dev, 766 struct device_attribute *attr, char *sysfsbuf) 767{ 768 int ret; 769 u8 buffer[4]; 770 u32 count; 771 772 mutex_lock(&applesmc_lock); 773 774 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); 775 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + 776 ((u32)buffer[2]<<8) + buffer[3]; 777 778 mutex_unlock(&applesmc_lock); 779 if (ret) 780 return ret; 781 else 782 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); 783} 784 785static ssize_t applesmc_key_at_index_read_show(struct device *dev, 786 struct device_attribute *attr, char *sysfsbuf) 787{ 788 char key[5]; 789 char info[6]; 790 int ret; 791 792 mutex_lock(&applesmc_lock); 793 794 ret = applesmc_get_key_at_index(key_at_index, key); 795 796 if (ret || !key[0]) { 797 mutex_unlock(&applesmc_lock); 798 799 return -EINVAL; 800 } 801 802 ret = applesmc_get_key_type(key, info); 803 804 if (ret) { 805 mutex_unlock(&applesmc_lock); 806 807 return ret; 808 } 809 810 /* 811 * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than 812 * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf. 813 */ 814 ret = applesmc_read_key(key, sysfsbuf, info[0]); 815 816 mutex_unlock(&applesmc_lock); 817 818 if (!ret) { 819 return info[0]; 820 } 821 else { 822 return ret; 823 } 824} 825 826static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, 827 struct device_attribute *attr, char *sysfsbuf) 828{ 829 char key[5]; 830 char info[6]; 831 int ret; 832 833 mutex_lock(&applesmc_lock); 834 835 ret = applesmc_get_key_at_index(key_at_index, key); 836 837 if (ret || !key[0]) { 838 mutex_unlock(&applesmc_lock); 839 840 return -EINVAL; 841 } 842 843 ret = applesmc_get_key_type(key, info); 844 845 mutex_unlock(&applesmc_lock); 846 847 if (!ret) 848 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]); 849 else 850 return ret; 851} 852 853static ssize_t applesmc_key_at_index_type_show(struct device *dev, 854 struct device_attribute *attr, char *sysfsbuf) 855{ 856 char key[5]; 857 char info[6]; 858 int ret; 859 860 mutex_lock(&applesmc_lock); 861 862 ret = applesmc_get_key_at_index(key_at_index, key); 863 864 if (ret || !key[0]) { 865 mutex_unlock(&applesmc_lock); 866 867 return -EINVAL; 868 } 869 870 ret = applesmc_get_key_type(key, info); 871 872 mutex_unlock(&applesmc_lock); 873 874 if (!ret) 875 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1); 876 else 877 return ret; 878} 879 880static ssize_t applesmc_key_at_index_name_show(struct device *dev, 881 struct device_attribute *attr, char *sysfsbuf) 882{ 883 char key[5]; 884 int ret; 885 886 mutex_lock(&applesmc_lock); 887 888 ret = applesmc_get_key_at_index(key_at_index, key); 889 890 mutex_unlock(&applesmc_lock); 891 892 if (!ret && key[0]) 893 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key); 894 else 895 return -EINVAL; 896} 897 898static ssize_t applesmc_key_at_index_show(struct device *dev, 899 struct device_attribute *attr, char *sysfsbuf) 900{ 901 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); 902} 903 904static ssize_t applesmc_key_at_index_store(struct device *dev, 905 struct device_attribute *attr, const char *sysfsbuf, size_t count) 906{ 907 mutex_lock(&applesmc_lock); 908 909 key_at_index = simple_strtoul(sysfsbuf, NULL, 10); 910 911 mutex_unlock(&applesmc_lock); 912 913 return count; 914} 915 916static struct led_classdev applesmc_backlight = { 917 .name = "smc:kbd_backlight", 918 .default_trigger = "nand-disk", 919 .brightness_set = applesmc_brightness_set, 920}; 921 922static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL); 923 924static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL); 925static DEVICE_ATTR(calibrate, 0644, 926 applesmc_calibrate_show, applesmc_calibrate_store); 927 928static struct attribute *accelerometer_attributes[] = { 929 &dev_attr_position.attr, 930 &dev_attr_calibrate.attr, 931 NULL 932}; 933 934static const struct attribute_group accelerometer_attributes_group = 935 { .attrs = accelerometer_attributes }; 936 937static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL); 938 939static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL); 940static DEVICE_ATTR(key_at_index, 0644, 941 applesmc_key_at_index_show, applesmc_key_at_index_store); 942static DEVICE_ATTR(key_at_index_name, 0444, 943 applesmc_key_at_index_name_show, NULL); 944static DEVICE_ATTR(key_at_index_type, 0444, 945 applesmc_key_at_index_type_show, NULL); 946static DEVICE_ATTR(key_at_index_data_length, 0444, 947 applesmc_key_at_index_data_length_show, NULL); 948static DEVICE_ATTR(key_at_index_data, 0444, 949 applesmc_key_at_index_read_show, NULL); 950 951static struct attribute *key_enumeration_attributes[] = { 952 &dev_attr_key_count.attr, 953 &dev_attr_key_at_index.attr, 954 &dev_attr_key_at_index_name.attr, 955 &dev_attr_key_at_index_type.attr, 956 &dev_attr_key_at_index_data_length.attr, 957 &dev_attr_key_at_index_data.attr, 958 NULL 959}; 960 961static const struct attribute_group key_enumeration_group = 962 { .attrs = key_enumeration_attributes }; 963 964/* 965 * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries. 966 * - show actual speed 967 * - show/store minimum speed 968 * - show maximum speed 969 * - show safe speed 970 * - show/store target speed 971 * - show/store manual mode 972 */ 973#define sysfs_fan_speeds_offset(offset) \ 974static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \ 975 applesmc_show_fan_speed, NULL, 0, offset-1); \ 976\ 977static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \ 978 applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \ 979\ 980static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \ 981 applesmc_show_fan_speed, NULL, 2, offset-1); \ 982\ 983static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \ 984 applesmc_show_fan_speed, NULL, 3, offset-1); \ 985\ 986static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \ 987 applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \ 988\ 989static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \ 990 applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \ 991\ 992static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \ 993 applesmc_show_fan_position, NULL, offset-1); \ 994\ 995static struct attribute *fan##offset##_attributes[] = { \ 996 &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \ 997 &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \ 998 &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \ 999 &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \ 1000 &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \ 1001 &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \ 1002 &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \ 1003 NULL \ 1004}; 1005 1006/* 1007 * Create the needed functions for each fan using the macro defined above 1008 * (2 fans are supported) 1009 */ 1010sysfs_fan_speeds_offset(1); 1011sysfs_fan_speeds_offset(2); 1012 1013static const struct attribute_group fan_attribute_groups[] = { 1014 { .attrs = fan1_attributes }, 1015 { .attrs = fan2_attributes } 1016}; 1017 1018/* 1019 * Temperature sensors sysfs entries. 1020 */ 1021static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, 1022 applesmc_show_temperature, NULL, 0); 1023static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, 1024 applesmc_show_temperature, NULL, 1); 1025static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, 1026 applesmc_show_temperature, NULL, 2); 1027static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, 1028 applesmc_show_temperature, NULL, 3); 1029static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, 1030 applesmc_show_temperature, NULL, 4); 1031static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, 1032 applesmc_show_temperature, NULL, 5); 1033static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, 1034 applesmc_show_temperature, NULL, 6); 1035static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, 1036 applesmc_show_temperature, NULL, 7); 1037static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, 1038 applesmc_show_temperature, NULL, 8); 1039static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, 1040 applesmc_show_temperature, NULL, 9); 1041static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, 1042 applesmc_show_temperature, NULL, 10); 1043static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, 1044 applesmc_show_temperature, NULL, 11); 1045 1046static struct attribute *temperature_attributes[] = { 1047 &sensor_dev_attr_temp1_input.dev_attr.attr, 1048 &sensor_dev_attr_temp2_input.dev_attr.attr, 1049 &sensor_dev_attr_temp3_input.dev_attr.attr, 1050 &sensor_dev_attr_temp4_input.dev_attr.attr, 1051 &sensor_dev_attr_temp5_input.dev_attr.attr, 1052 &sensor_dev_attr_temp6_input.dev_attr.attr, 1053 &sensor_dev_attr_temp7_input.dev_attr.attr, 1054 &sensor_dev_attr_temp8_input.dev_attr.attr, 1055 &sensor_dev_attr_temp9_input.dev_attr.attr, 1056 &sensor_dev_attr_temp10_input.dev_attr.attr, 1057 &sensor_dev_attr_temp11_input.dev_attr.attr, 1058 &sensor_dev_attr_temp12_input.dev_attr.attr, 1059 NULL 1060}; 1061 1062static const struct attribute_group temperature_attributes_group = 1063 { .attrs = temperature_attributes }; 1064 1065/* Module stuff */ 1066 1067/* 1068 * applesmc_dmi_match - found a match. return one, short-circuiting the hunt. 1069 */ 1070static int applesmc_dmi_match(struct dmi_system_id *id) 1071{ 1072 int i = 0; 1073 struct dmi_match_data* dmi_data = id->driver_data; 1074 printk(KERN_INFO "applesmc: %s detected:\n", id->ident); 1075 applesmc_accelerometer = dmi_data->accelerometer; 1076 printk(KERN_INFO "applesmc: - Model %s accelerometer\n", 1077 applesmc_accelerometer ? "with" : "without"); 1078 applesmc_light = dmi_data->light; 1079 printk(KERN_INFO "applesmc: - Model %s light sensors and backlight\n", 1080 applesmc_light ? "with" : "without"); 1081 1082 applesmc_temperature_set = dmi_data->temperature_set; 1083 while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL) 1084 i++; 1085 printk(KERN_INFO "applesmc: - Model with %d temperature sensors\n", i); 1086 return 1; 1087} 1088 1089/* Create accelerometer ressources */ 1090static int applesmc_create_accelerometer(void) 1091{ 1092 int ret; 1093 1094 ret = sysfs_create_group(&pdev->dev.kobj, 1095 &accelerometer_attributes_group); 1096 if (ret) 1097 goto out; 1098 1099 applesmc_idev = input_allocate_device(); 1100 if (!applesmc_idev) { 1101 ret = -ENOMEM; 1102 goto out_sysfs; 1103 } 1104 1105 /* initial calibrate for the input device */ 1106 applesmc_calibrate(); 1107 1108 /* initialize the input class */ 1109 applesmc_idev->name = "applesmc"; 1110 applesmc_idev->id.bustype = BUS_HOST; 1111 applesmc_idev->dev.parent = &pdev->dev; 1112 applesmc_idev->evbit[0] = BIT(EV_ABS); 1113 applesmc_idev->open = applesmc_idev_open; 1114 applesmc_idev->close = applesmc_idev_close; 1115 input_set_abs_params(applesmc_idev, ABS_X, 1116 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); 1117 input_set_abs_params(applesmc_idev, ABS_Y, 1118 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); 1119 1120 ret = input_register_device(applesmc_idev); 1121 if (ret) 1122 goto out_idev; 1123 1124 /* start up our timer for the input device */ 1125 init_timer(&applesmc_timer); 1126 applesmc_timer.function = applesmc_idev_poll; 1127 applesmc_timer.expires = jiffies + APPLESMC_POLL_PERIOD; 1128 1129 return 0; 1130 1131out_idev: 1132 input_free_device(applesmc_idev); 1133 1134out_sysfs: 1135 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group); 1136 1137out: 1138 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret); 1139 return ret; 1140} 1141 1142/* Release all ressources used by the accelerometer */ 1143static void applesmc_release_accelerometer(void) 1144{ 1145 del_timer_sync(&applesmc_timer); 1146 input_unregister_device(applesmc_idev); 1147 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group); 1148} 1149 1150static __initdata struct dmi_match_data applesmc_dmi_data[] = { 1151/* MacBook Pro: accelerometer, backlight and temperature set 0 */ 1152 { .accelerometer = 1, .light = 1, .temperature_set = 0 }, 1153/* MacBook: accelerometer and temperature set 0 */ 1154 { .accelerometer = 1, .light = 0, .temperature_set = 0 }, 1155/* MacBook: temperature set 1 */ 1156 { .accelerometer = 0, .light = 0, .temperature_set = 1 } 1157}; 1158 1159/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". 1160 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */ 1161static __initdata struct dmi_system_id applesmc_whitelist[] = { 1162 { applesmc_dmi_match, "Apple MacBook Pro", { 1163 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1164 DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") }, 1165 (void*)&applesmc_dmi_data[0]}, 1166 { applesmc_dmi_match, "Apple MacBook", { 1167 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1168 DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") }, 1169 (void*)&applesmc_dmi_data[1]}, 1170 { applesmc_dmi_match, "Apple Macmini", { 1171 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1172 DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") }, 1173 (void*)&applesmc_dmi_data[2]}, 1174 { .ident = NULL } 1175}; 1176 1177static int __init applesmc_init(void) 1178{ 1179 int ret; 1180 int count; 1181 int i; 1182 1183 mutex_init(&applesmc_lock); 1184 1185 if (!dmi_check_system(applesmc_whitelist)) { 1186 printk(KERN_WARNING "applesmc: supported laptop not found!\n"); 1187 ret = -ENODEV; 1188 goto out; 1189 } 1190 1191 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, 1192 "applesmc")) { 1193 ret = -ENXIO; 1194 goto out; 1195 } 1196 1197 ret = platform_driver_register(&applesmc_driver); 1198 if (ret) 1199 goto out_region; 1200 1201 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, 1202 NULL, 0); 1203 if (IS_ERR(pdev)) { 1204 ret = PTR_ERR(pdev); 1205 goto out_driver; 1206 } 1207 1208 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr); 1209 if (ret) 1210 goto out_device; 1211 1212 /* Create key enumeration sysfs files */ 1213 ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group); 1214 if (ret) 1215 goto out_name; 1216 1217 /* create fan files */ 1218 count = applesmc_get_fan_count(); 1219 if (count < 0) { 1220 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n"); 1221 } else { 1222 printk(KERN_INFO "applesmc: %d fans found.\n", count); 1223 1224 switch (count) { 1225 default: 1226 printk(KERN_WARNING "applesmc: More than 2 fans found," 1227 " but at most 2 fans are supported" 1228 " by the driver.\n"); 1229 case 2: 1230 ret = sysfs_create_group(&pdev->dev.kobj, 1231 &fan_attribute_groups[1]); 1232 if (ret) 1233 goto out_key_enumeration; 1234 case 1: 1235 ret = sysfs_create_group(&pdev->dev.kobj, 1236 &fan_attribute_groups[0]); 1237 if (ret) 1238 goto out_fan_1; 1239 case 0: 1240 ; 1241 } 1242 } 1243 1244 for (i = 0; 1245 temperature_sensors_sets[applesmc_temperature_set][i] != NULL; 1246 i++) { 1247 if (temperature_attributes[i] == NULL) { 1248 printk(KERN_ERR "applesmc: More temperature sensors " 1249 "in temperature_sensors_sets (at least %i)" 1250 "than available sysfs files in " 1251 "temperature_attributes (%i), please report " 1252 "this bug.\n", i, i-1); 1253 goto out_temperature; 1254 } 1255 ret = sysfs_create_file(&pdev->dev.kobj, 1256 temperature_attributes[i]); 1257 if (ret) 1258 goto out_temperature; 1259 } 1260 1261 if (applesmc_accelerometer) { 1262 ret = applesmc_create_accelerometer(); 1263 if (ret) 1264 goto out_temperature; 1265 } 1266 1267 if (applesmc_light) { 1268 /* Add light sensor file */ 1269 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr); 1270 if (ret) 1271 goto out_accelerometer; 1272 1273 /* Create the workqueue */ 1274 applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); 1275 if (!applesmc_led_wq) { 1276 ret = -ENOMEM; 1277 goto out_light_sysfs; 1278 } 1279 1280 /* register as a led device */ 1281 ret = led_classdev_register(&pdev->dev, &applesmc_backlight); 1282 if (ret < 0) 1283 goto out_light_wq; 1284 } 1285 1286 hwmon_class_dev = hwmon_device_register(&pdev->dev); 1287 if (IS_ERR(hwmon_class_dev)) { 1288 ret = PTR_ERR(hwmon_class_dev); 1289 goto out_light_ledclass; 1290 } 1291 1292 printk(KERN_INFO "applesmc: driver successfully loaded.\n"); 1293 1294 return 0; 1295 1296out_light_ledclass: 1297 if (applesmc_light) 1298 led_classdev_unregister(&applesmc_backlight); 1299out_light_wq: 1300 if (applesmc_light) 1301 destroy_workqueue(applesmc_led_wq); 1302out_light_sysfs: 1303 if (applesmc_light) 1304 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr); 1305out_accelerometer: 1306 if (applesmc_accelerometer) 1307 applesmc_release_accelerometer(); 1308out_temperature: 1309 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group); 1310 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]); 1311out_fan_1: 1312 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]); 1313out_key_enumeration: 1314 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); 1315out_name: 1316 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); 1317out_device: 1318 platform_device_unregister(pdev); 1319out_driver: 1320 platform_driver_unregister(&applesmc_driver); 1321out_region: 1322 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); 1323out: 1324 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret); 1325 return ret; 1326} 1327 1328static void __exit applesmc_exit(void) 1329{ 1330 hwmon_device_unregister(hwmon_class_dev); 1331 if (applesmc_light) { 1332 led_classdev_unregister(&applesmc_backlight); 1333 destroy_workqueue(applesmc_led_wq); 1334 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr); 1335 } 1336 if (applesmc_accelerometer) 1337 applesmc_release_accelerometer(); 1338 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group); 1339 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]); 1340 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]); 1341 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); 1342 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); 1343 platform_device_unregister(pdev); 1344 platform_driver_unregister(&applesmc_driver); 1345 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); 1346 1347 printk(KERN_INFO "applesmc: driver unloaded.\n"); 1348} 1349 1350module_init(applesmc_init); 1351module_exit(applesmc_exit); 1352 1353MODULE_AUTHOR("Nicolas Boichat"); 1354MODULE_DESCRIPTION("Apple SMC"); 1355MODULE_LICENSE("GPL v2"); 1356