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 */ 84 static 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 */ 91 static 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 */ 111 struct 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 }; 119 120 static const int debug; 121 static struct platform_device *pdev; 122 static s16 rest_x; 123 static s16 rest_y; 124 static struct timer_list applesmc_timer; 125 static struct input_dev *applesmc_idev; 126 static struct class_device *hwmon_class_dev; 127 128 /* Indicates whether this computer has an accelerometer. */ 129 static unsigned int applesmc_accelerometer; 130 131 /* Indicates whether this computer has light sensors and keyboard backlight. */ 132 static unsigned int applesmc_light; 133 134 /* Indicates which temperature sensors set to use. */ 135 static unsigned int applesmc_temperature_set; 136 137 static 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 */ 143 static unsigned int key_at_index; 144 145 static 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 */ 152 static 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 */ 180 static 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 */ 224 static 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 */ 260 static 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 */ 296 static 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 */ 326 static 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 */ 354 static 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"); 390 391 out: 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 */ 400 static 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 */ 417 static 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 } 428 429 static int applesmc_resume(struct platform_device *dev) 430 { 431 return applesmc_device_init(); 432 } 433 434 static 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 */ 447 static 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 } 453 454 static int applesmc_idev_open(struct input_dev *dev) 455 { 456 add_timer(&applesmc_timer); 457 458 return 0; 459 } 460 461 static void applesmc_idev_close(struct input_dev *dev) 462 { 463 del_timer_sync(&applesmc_timer); 464 } 465 466 static 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); 485 486 out: 487 mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD); 488 489 mutex_unlock(&applesmc_lock); 490 } 491 492 /* Sysfs Files */ 493 494 static ssize_t applesmc_position_show(struct device *dev, 495 struct device_attribute *attr, char *buf) 496 { 497 int ret; 498 s16 x, y, z; 499 500 mutex_lock(&applesmc_lock); 501 502 ret = applesmc_read_motion_sensor(SENSOR_X, &x); 503 if (ret) 504 goto out; 505 ret = applesmc_read_motion_sensor(SENSOR_Y, &y); 506 if (ret) 507 goto out; 508 ret = applesmc_read_motion_sensor(SENSOR_Z, &z); 509 if (ret) 510 goto out; 511 512 out: 513 mutex_unlock(&applesmc_lock); 514 if (ret) 515 return ret; 516 else 517 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); 518 } 519 520 static ssize_t applesmc_light_show(struct device *dev, 521 struct device_attribute *attr, char *sysfsbuf) 522 { 523 int ret; 524 u8 left = 0, right = 0; 525 u8 buffer[6]; 526 527 mutex_lock(&applesmc_lock); 528 529 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6); 530 left = buffer[2]; 531 if (ret) 532 goto out; 533 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6); 534 right = buffer[2]; 535 536 out: 537 mutex_unlock(&applesmc_lock); 538 if (ret) 539 return ret; 540 else 541 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); 542 } 543 544 /* Displays degree Celsius * 1000 */ 545 static ssize_t applesmc_show_temperature(struct device *dev, 546 struct device_attribute *devattr, char *sysfsbuf) 547 { 548 int ret; 549 u8 buffer[2]; 550 unsigned int temp; 551 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 552 const char* key = 553 temperature_sensors_sets[applesmc_temperature_set][attr->index]; 554 555 mutex_lock(&applesmc_lock); 556 557 ret = applesmc_read_key(key, buffer, 2); 558 temp = buffer[0]*1000; 559 temp += (buffer[1] >> 6) * 250; 560 561 mutex_unlock(&applesmc_lock); 562 563 if (ret) 564 return ret; 565 else 566 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp); 567 } 568 569 static ssize_t applesmc_show_fan_speed(struct device *dev, 570 struct device_attribute *attr, char *sysfsbuf) 571 { 572 int ret; 573 unsigned int speed = 0; 574 char newkey[5]; 575 u8 buffer[2]; 576 struct sensor_device_attribute_2 *sensor_attr = 577 to_sensor_dev_attr_2(attr); 578 579 newkey[0] = fan_speed_keys[sensor_attr->nr][0]; 580 newkey[1] = '0' + sensor_attr->index; 581 newkey[2] = fan_speed_keys[sensor_attr->nr][2]; 582 newkey[3] = fan_speed_keys[sensor_attr->nr][3]; 583 newkey[4] = 0; 584 585 mutex_lock(&applesmc_lock); 586 587 ret = applesmc_read_key(newkey, buffer, 2); 588 speed = ((buffer[0] << 8 | buffer[1]) >> 2); 589 590 mutex_unlock(&applesmc_lock); 591 if (ret) 592 return ret; 593 else 594 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); 595 } 596 597 static ssize_t applesmc_store_fan_speed(struct device *dev, 598 struct device_attribute *attr, 599 const char *sysfsbuf, size_t count) 600 { 601 int ret; 602 u32 speed; 603 char newkey[5]; 604 u8 buffer[2]; 605 struct sensor_device_attribute_2 *sensor_attr = 606 to_sensor_dev_attr_2(attr); 607 608 speed = simple_strtoul(sysfsbuf, NULL, 10); 609 610 if (speed > 0x4000) /* Bigger than a 14-bit value */ 611 return -EINVAL; 612 613 newkey[0] = fan_speed_keys[sensor_attr->nr][0]; 614 newkey[1] = '0' + sensor_attr->index; 615 newkey[2] = fan_speed_keys[sensor_attr->nr][2]; 616 newkey[3] = fan_speed_keys[sensor_attr->nr][3]; 617 newkey[4] = 0; 618 619 mutex_lock(&applesmc_lock); 620 621 buffer[0] = (speed >> 6) & 0xff; 622 buffer[1] = (speed << 2) & 0xff; 623 ret = applesmc_write_key(newkey, buffer, 2); 624 625 mutex_unlock(&applesmc_lock); 626 if (ret) 627 return ret; 628 else 629 return count; 630 } 631 632 static ssize_t applesmc_show_fan_manual(struct device *dev, 633 struct device_attribute *devattr, char *sysfsbuf) 634 { 635 int ret; 636 u16 manual = 0; 637 u8 buffer[2]; 638 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 639 640 mutex_lock(&applesmc_lock); 641 642 ret = applesmc_read_key(FANS_MANUAL, buffer, 2); 643 manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01; 644 645 mutex_unlock(&applesmc_lock); 646 if (ret) 647 return ret; 648 else 649 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); 650 } 651 652 static ssize_t applesmc_store_fan_manual(struct device *dev, 653 struct device_attribute *devattr, 654 const char *sysfsbuf, size_t count) 655 { 656 int ret; 657 u8 buffer[2]; 658 u32 input; 659 u16 val; 660 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 661 662 input = simple_strtoul(sysfsbuf, NULL, 10); 663 664 mutex_lock(&applesmc_lock); 665 666 ret = applesmc_read_key(FANS_MANUAL, buffer, 2); 667 val = (buffer[0] << 8 | buffer[1]); 668 if (ret) 669 goto out; 670 671 if (input) 672 val = val | (0x01 << attr->index); 673 else 674 val = val & ~(0x01 << attr->index); 675 676 buffer[0] = (val >> 8) & 0xFF; 677 buffer[1] = val & 0xFF; 678 679 ret = applesmc_write_key(FANS_MANUAL, buffer, 2); 680 681 out: 682 mutex_unlock(&applesmc_lock); 683 if (ret) 684 return ret; 685 else 686 return count; 687 } 688 689 static ssize_t applesmc_show_fan_position(struct device *dev, 690 struct device_attribute *attr, char *sysfsbuf) 691 { 692 int ret; 693 char newkey[5]; 694 u8 buffer[17]; 695 struct sensor_device_attribute_2 *sensor_attr = 696 to_sensor_dev_attr_2(attr); 697 698 newkey[0] = FAN_POSITION[0]; 699 newkey[1] = '0' + sensor_attr->index; 700 newkey[2] = FAN_POSITION[2]; 701 newkey[3] = FAN_POSITION[3]; 702 newkey[4] = 0; 703 704 mutex_lock(&applesmc_lock); 705 706 ret = applesmc_read_key(newkey, buffer, 16); 707 buffer[16] = 0; 708 709 mutex_unlock(&applesmc_lock); 710 if (ret) 711 return ret; 712 else 713 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); 714 } 715 716 static ssize_t applesmc_calibrate_show(struct device *dev, 717 struct device_attribute *attr, char *sysfsbuf) 718 { 719 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); 720 } 721 722 static ssize_t applesmc_calibrate_store(struct device *dev, 723 struct device_attribute *attr, const char *sysfsbuf, size_t count) 724 { 725 mutex_lock(&applesmc_lock); 726 applesmc_calibrate(); 727 mutex_unlock(&applesmc_lock); 728 729 return count; 730 } 731 732 /* Store the next backlight value to be written by the work */ 733 static unsigned int backlight_value; 734 735 static void applesmc_backlight_set(struct work_struct *work) 736 { 737 u8 buffer[2]; 738 739 mutex_lock(&applesmc_lock); 740 buffer[0] = backlight_value; 741 buffer[1] = 0x00; 742 applesmc_write_key(BACKLIGHT_KEY, buffer, 2); 743 mutex_unlock(&applesmc_lock); 744 } 745 static DECLARE_WORK(backlight_work, &applesmc_backlight_set); 746 747 static void applesmc_brightness_set(struct led_classdev *led_cdev, 748 enum led_brightness value) 749 { 750 int ret; 751 752 backlight_value = value; 753 ret = queue_work(applesmc_led_wq, &backlight_work); 754 755 if (debug && (!ret)) 756 printk(KERN_DEBUG "applesmc: work was already on the queue.\n"); 757 } 758 759 static ssize_t applesmc_key_count_show(struct device *dev, 760 struct device_attribute *attr, char *sysfsbuf) 761 { 762 int ret; 763 u8 buffer[4]; 764 u32 count; 765 766 mutex_lock(&applesmc_lock); 767 768 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); 769 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + 770 ((u32)buffer[2]<<8) + buffer[3]; 771 772 mutex_unlock(&applesmc_lock); 773 if (ret) 774 return ret; 775 else 776 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); 777 } 778 779 static ssize_t applesmc_key_at_index_read_show(struct device *dev, 780 struct device_attribute *attr, char *sysfsbuf) 781 { 782 char key[5]; 783 char info[6]; 784 int ret; 785 786 mutex_lock(&applesmc_lock); 787 788 ret = applesmc_get_key_at_index(key_at_index, key); 789 790 if (ret || !key[0]) { 791 mutex_unlock(&applesmc_lock); 792 793 return -EINVAL; 794 } 795 796 ret = applesmc_get_key_type(key, info); 797 798 if (ret) { 799 mutex_unlock(&applesmc_lock); 800 801 return ret; 802 } 803 804 /* 805 * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than 806 * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf. 807 */ 808 ret = applesmc_read_key(key, sysfsbuf, info[0]); 809 810 mutex_unlock(&applesmc_lock); 811 812 if (!ret) { 813 return info[0]; 814 } 815 else { 816 return ret; 817 } 818 } 819 820 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, 821 struct device_attribute *attr, char *sysfsbuf) 822 { 823 char key[5]; 824 char info[6]; 825 int ret; 826 827 mutex_lock(&applesmc_lock); 828 829 ret = applesmc_get_key_at_index(key_at_index, key); 830 831 if (ret || !key[0]) { 832 mutex_unlock(&applesmc_lock); 833 834 return -EINVAL; 835 } 836 837 ret = applesmc_get_key_type(key, info); 838 839 mutex_unlock(&applesmc_lock); 840 841 if (!ret) 842 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]); 843 else 844 return ret; 845 } 846 847 static ssize_t applesmc_key_at_index_type_show(struct device *dev, 848 struct device_attribute *attr, char *sysfsbuf) 849 { 850 char key[5]; 851 char info[6]; 852 int ret; 853 854 mutex_lock(&applesmc_lock); 855 856 ret = applesmc_get_key_at_index(key_at_index, key); 857 858 if (ret || !key[0]) { 859 mutex_unlock(&applesmc_lock); 860 861 return -EINVAL; 862 } 863 864 ret = applesmc_get_key_type(key, info); 865 866 mutex_unlock(&applesmc_lock); 867 868 if (!ret) 869 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1); 870 else 871 return ret; 872 } 873 874 static ssize_t applesmc_key_at_index_name_show(struct device *dev, 875 struct device_attribute *attr, char *sysfsbuf) 876 { 877 char key[5]; 878 int ret; 879 880 mutex_lock(&applesmc_lock); 881 882 ret = applesmc_get_key_at_index(key_at_index, key); 883 884 mutex_unlock(&applesmc_lock); 885 886 if (!ret && key[0]) 887 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key); 888 else 889 return -EINVAL; 890 } 891 892 static ssize_t applesmc_key_at_index_show(struct device *dev, 893 struct device_attribute *attr, char *sysfsbuf) 894 { 895 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); 896 } 897 898 static ssize_t applesmc_key_at_index_store(struct device *dev, 899 struct device_attribute *attr, const char *sysfsbuf, size_t count) 900 { 901 mutex_lock(&applesmc_lock); 902 903 key_at_index = simple_strtoul(sysfsbuf, NULL, 10); 904 905 mutex_unlock(&applesmc_lock); 906 907 return count; 908 } 909 910 static struct led_classdev applesmc_backlight = { 911 .name = "smc:kbd_backlight", 912 .default_trigger = "nand-disk", 913 .brightness_set = applesmc_brightness_set, 914 }; 915 916 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL); 917 static DEVICE_ATTR(calibrate, 0644, 918 applesmc_calibrate_show, applesmc_calibrate_store); 919 920 static struct attribute *accelerometer_attributes[] = { 921 &dev_attr_position.attr, 922 &dev_attr_calibrate.attr, 923 NULL 924 }; 925 926 static const struct attribute_group accelerometer_attributes_group = 927 { .attrs = accelerometer_attributes }; 928 929 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL); 930 931 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL); 932 static DEVICE_ATTR(key_at_index, 0644, 933 applesmc_key_at_index_show, applesmc_key_at_index_store); 934 static DEVICE_ATTR(key_at_index_name, 0444, 935 applesmc_key_at_index_name_show, NULL); 936 static DEVICE_ATTR(key_at_index_type, 0444, 937 applesmc_key_at_index_type_show, NULL); 938 static DEVICE_ATTR(key_at_index_data_length, 0444, 939 applesmc_key_at_index_data_length_show, NULL); 940 static DEVICE_ATTR(key_at_index_data, 0444, 941 applesmc_key_at_index_read_show, NULL); 942 943 static struct attribute *key_enumeration_attributes[] = { 944 &dev_attr_key_count.attr, 945 &dev_attr_key_at_index.attr, 946 &dev_attr_key_at_index_name.attr, 947 &dev_attr_key_at_index_type.attr, 948 &dev_attr_key_at_index_data_length.attr, 949 &dev_attr_key_at_index_data.attr, 950 NULL 951 }; 952 953 static const struct attribute_group key_enumeration_group = 954 { .attrs = key_enumeration_attributes }; 955 956 /* 957 * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries. 958 * - show actual speed 959 * - show/store minimum speed 960 * - show maximum speed 961 * - show safe speed 962 * - show/store target speed 963 * - show/store manual mode 964 */ 965 #define sysfs_fan_speeds_offset(offset) \ 966 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \ 967 applesmc_show_fan_speed, NULL, 0, offset-1); \ 968 \ 969 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \ 970 applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \ 971 \ 972 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \ 973 applesmc_show_fan_speed, NULL, 2, offset-1); \ 974 \ 975 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \ 976 applesmc_show_fan_speed, NULL, 3, offset-1); \ 977 \ 978 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \ 979 applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \ 980 \ 981 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \ 982 applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \ 983 \ 984 static SENSOR_DEVICE_ATTR(fan##offset##_position, S_IRUGO, \ 985 applesmc_show_fan_position, NULL, offset-1); \ 986 \ 987 static struct attribute *fan##offset##_attributes[] = { \ 988 &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \ 989 &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \ 990 &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \ 991 &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \ 992 &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \ 993 &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \ 994 &sensor_dev_attr_fan##offset##_position.dev_attr.attr, \ 995 NULL \ 996 }; 997 998 /* 999 * Create the needed functions for each fan using the macro defined above 1000 * (2 fans are supported) 1001 */ 1002 sysfs_fan_speeds_offset(1); 1003 sysfs_fan_speeds_offset(2); 1004 1005 static const struct attribute_group fan_attribute_groups[] = { 1006 { .attrs = fan1_attributes }, 1007 { .attrs = fan2_attributes } 1008 }; 1009 1010 /* 1011 * Temperature sensors sysfs entries. 1012 */ 1013 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, 1014 applesmc_show_temperature, NULL, 0); 1015 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, 1016 applesmc_show_temperature, NULL, 1); 1017 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, 1018 applesmc_show_temperature, NULL, 2); 1019 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, 1020 applesmc_show_temperature, NULL, 3); 1021 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, 1022 applesmc_show_temperature, NULL, 4); 1023 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, 1024 applesmc_show_temperature, NULL, 5); 1025 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, 1026 applesmc_show_temperature, NULL, 6); 1027 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, 1028 applesmc_show_temperature, NULL, 7); 1029 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, 1030 applesmc_show_temperature, NULL, 8); 1031 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, 1032 applesmc_show_temperature, NULL, 9); 1033 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, 1034 applesmc_show_temperature, NULL, 10); 1035 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, 1036 applesmc_show_temperature, NULL, 11); 1037 1038 static struct attribute *temperature_attributes[] = { 1039 &sensor_dev_attr_temp1_input.dev_attr.attr, 1040 &sensor_dev_attr_temp2_input.dev_attr.attr, 1041 &sensor_dev_attr_temp3_input.dev_attr.attr, 1042 &sensor_dev_attr_temp4_input.dev_attr.attr, 1043 &sensor_dev_attr_temp5_input.dev_attr.attr, 1044 &sensor_dev_attr_temp6_input.dev_attr.attr, 1045 &sensor_dev_attr_temp7_input.dev_attr.attr, 1046 &sensor_dev_attr_temp8_input.dev_attr.attr, 1047 &sensor_dev_attr_temp9_input.dev_attr.attr, 1048 &sensor_dev_attr_temp10_input.dev_attr.attr, 1049 &sensor_dev_attr_temp11_input.dev_attr.attr, 1050 &sensor_dev_attr_temp12_input.dev_attr.attr, 1051 NULL 1052 }; 1053 1054 static const struct attribute_group temperature_attributes_group = 1055 { .attrs = temperature_attributes }; 1056 1057 /* Module stuff */ 1058 1059 /* 1060 * applesmc_dmi_match - found a match. return one, short-circuiting the hunt. 1061 */ 1062 static int applesmc_dmi_match(struct dmi_system_id *id) 1063 { 1064 int i = 0; 1065 struct dmi_match_data* dmi_data = id->driver_data; 1066 printk(KERN_INFO "applesmc: %s detected:\n", id->ident); 1067 applesmc_accelerometer = dmi_data->accelerometer; 1068 printk(KERN_INFO "applesmc: - Model %s accelerometer\n", 1069 applesmc_accelerometer ? "with" : "without"); 1070 applesmc_light = dmi_data->light; 1071 printk(KERN_INFO "applesmc: - Model %s light sensors and backlight\n", 1072 applesmc_light ? "with" : "without"); 1073 1074 applesmc_temperature_set = dmi_data->temperature_set; 1075 while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL) 1076 i++; 1077 printk(KERN_INFO "applesmc: - Model with %d temperature sensors\n", i); 1078 return 1; 1079 } 1080 1081 /* Create accelerometer ressources */ 1082 static int applesmc_create_accelerometer(void) 1083 { 1084 int ret; 1085 1086 ret = sysfs_create_group(&pdev->dev.kobj, 1087 &accelerometer_attributes_group); 1088 if (ret) 1089 goto out; 1090 1091 applesmc_idev = input_allocate_device(); 1092 if (!applesmc_idev) { 1093 ret = -ENOMEM; 1094 goto out_sysfs; 1095 } 1096 1097 /* initial calibrate for the input device */ 1098 applesmc_calibrate(); 1099 1100 /* initialize the input class */ 1101 applesmc_idev->name = "applesmc"; 1102 applesmc_idev->id.bustype = BUS_HOST; 1103 applesmc_idev->cdev.dev = &pdev->dev; 1104 applesmc_idev->evbit[0] = BIT(EV_ABS); 1105 applesmc_idev->open = applesmc_idev_open; 1106 applesmc_idev->close = applesmc_idev_close; 1107 input_set_abs_params(applesmc_idev, ABS_X, 1108 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); 1109 input_set_abs_params(applesmc_idev, ABS_Y, 1110 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); 1111 1112 ret = input_register_device(applesmc_idev); 1113 if (ret) 1114 goto out_idev; 1115 1116 /* start up our timer for the input device */ 1117 init_timer(&applesmc_timer); 1118 applesmc_timer.function = applesmc_idev_poll; 1119 applesmc_timer.expires = jiffies + APPLESMC_POLL_PERIOD; 1120 1121 return 0; 1122 1123 out_idev: 1124 input_free_device(applesmc_idev); 1125 1126 out_sysfs: 1127 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group); 1128 1129 out: 1130 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret); 1131 return ret; 1132 } 1133 1134 /* Release all ressources used by the accelerometer */ 1135 static void applesmc_release_accelerometer(void) 1136 { 1137 del_timer_sync(&applesmc_timer); 1138 input_unregister_device(applesmc_idev); 1139 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group); 1140 } 1141 1142 static __initdata struct dmi_match_data applesmc_dmi_data[] = { 1143 /* MacBook Pro: accelerometer, backlight and temperature set 0 */ 1144 { .accelerometer = 1, .light = 1, .temperature_set = 0 }, 1145 /* MacBook: accelerometer and temperature set 0 */ 1146 { .accelerometer = 1, .light = 0, .temperature_set = 0 }, 1147 /* MacBook: temperature set 1 */ 1148 { .accelerometer = 0, .light = 0, .temperature_set = 1 } 1149 }; 1150 1151 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". 1152 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */ 1153 static __initdata struct dmi_system_id applesmc_whitelist[] = { 1154 { applesmc_dmi_match, "Apple MacBook Pro", { 1155 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1156 DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") }, 1157 (void*)&applesmc_dmi_data[0]}, 1158 { applesmc_dmi_match, "Apple MacBook", { 1159 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1160 DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") }, 1161 (void*)&applesmc_dmi_data[1]}, 1162 { applesmc_dmi_match, "Apple Macmini", { 1163 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1164 DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") }, 1165 (void*)&applesmc_dmi_data[2]}, 1166 { .ident = NULL } 1167 }; 1168 1169 static int __init applesmc_init(void) 1170 { 1171 int ret; 1172 int count; 1173 int i; 1174 1175 mutex_init(&applesmc_lock); 1176 1177 if (!dmi_check_system(applesmc_whitelist)) { 1178 printk(KERN_WARNING "applesmc: supported laptop not found!\n"); 1179 ret = -ENODEV; 1180 goto out; 1181 } 1182 1183 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, 1184 "applesmc")) { 1185 ret = -ENXIO; 1186 goto out; 1187 } 1188 1189 ret = platform_driver_register(&applesmc_driver); 1190 if (ret) 1191 goto out_region; 1192 1193 pdev = platform_device_register_simple("applesmc", -1, NULL, 0); 1194 if (IS_ERR(pdev)) { 1195 ret = PTR_ERR(pdev); 1196 goto out_driver; 1197 } 1198 1199 /* Create key enumeration sysfs files */ 1200 ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group); 1201 if (ret) 1202 goto out_device; 1203 1204 /* create fan files */ 1205 count = applesmc_get_fan_count(); 1206 if (count < 0) { 1207 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n"); 1208 } else { 1209 printk(KERN_INFO "applesmc: %d fans found.\n", count); 1210 1211 switch (count) { 1212 default: 1213 printk(KERN_WARNING "applesmc: More than 2 fans found," 1214 " but at most 2 fans are supported" 1215 " by the driver.\n"); 1216 case 2: 1217 ret = sysfs_create_group(&pdev->dev.kobj, 1218 &fan_attribute_groups[1]); 1219 if (ret) 1220 goto out_key_enumeration; 1221 case 1: 1222 ret = sysfs_create_group(&pdev->dev.kobj, 1223 &fan_attribute_groups[0]); 1224 if (ret) 1225 goto out_fan_1; 1226 case 0: 1227 ; 1228 } 1229 } 1230 1231 for (i = 0; 1232 temperature_sensors_sets[applesmc_temperature_set][i] != NULL; 1233 i++) { 1234 if (temperature_attributes[i] == NULL) { 1235 printk(KERN_ERR "applesmc: More temperature sensors " 1236 "in temperature_sensors_sets (at least %i)" 1237 "than available sysfs files in " 1238 "temperature_attributes (%i), please report " 1239 "this bug.\n", i, i-1); 1240 goto out_temperature; 1241 } 1242 ret = sysfs_create_file(&pdev->dev.kobj, 1243 temperature_attributes[i]); 1244 if (ret) 1245 goto out_temperature; 1246 } 1247 1248 if (applesmc_accelerometer) { 1249 ret = applesmc_create_accelerometer(); 1250 if (ret) 1251 goto out_temperature; 1252 } 1253 1254 if (applesmc_light) { 1255 /* Add light sensor file */ 1256 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr); 1257 if (ret) 1258 goto out_accelerometer; 1259 1260 /* Create the workqueue */ 1261 applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); 1262 if (!applesmc_led_wq) { 1263 ret = -ENOMEM; 1264 goto out_light_sysfs; 1265 } 1266 1267 /* register as a led device */ 1268 ret = led_classdev_register(&pdev->dev, &applesmc_backlight); 1269 if (ret < 0) 1270 goto out_light_wq; 1271 } 1272 1273 hwmon_class_dev = hwmon_device_register(&pdev->dev); 1274 if (IS_ERR(hwmon_class_dev)) { 1275 ret = PTR_ERR(hwmon_class_dev); 1276 goto out_light_ledclass; 1277 } 1278 1279 printk(KERN_INFO "applesmc: driver successfully loaded.\n"); 1280 1281 return 0; 1282 1283 out_light_ledclass: 1284 if (applesmc_light) 1285 led_classdev_unregister(&applesmc_backlight); 1286 out_light_wq: 1287 if (applesmc_light) 1288 destroy_workqueue(applesmc_led_wq); 1289 out_light_sysfs: 1290 if (applesmc_light) 1291 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr); 1292 out_accelerometer: 1293 if (applesmc_accelerometer) 1294 applesmc_release_accelerometer(); 1295 out_temperature: 1296 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group); 1297 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]); 1298 out_fan_1: 1299 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]); 1300 out_key_enumeration: 1301 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); 1302 out_device: 1303 platform_device_unregister(pdev); 1304 out_driver: 1305 platform_driver_unregister(&applesmc_driver); 1306 out_region: 1307 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); 1308 out: 1309 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret); 1310 return ret; 1311 } 1312 1313 static void __exit applesmc_exit(void) 1314 { 1315 hwmon_device_unregister(hwmon_class_dev); 1316 if (applesmc_light) { 1317 led_classdev_unregister(&applesmc_backlight); 1318 destroy_workqueue(applesmc_led_wq); 1319 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr); 1320 } 1321 if (applesmc_accelerometer) 1322 applesmc_release_accelerometer(); 1323 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group); 1324 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]); 1325 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]); 1326 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); 1327 platform_device_unregister(pdev); 1328 platform_driver_unregister(&applesmc_driver); 1329 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); 1330 1331 printk(KERN_INFO "applesmc: driver unloaded.\n"); 1332 } 1333 1334 module_init(applesmc_init); 1335 module_exit(applesmc_exit); 1336 1337 MODULE_AUTHOR("Nicolas Boichat"); 1338 MODULE_DESCRIPTION("Apple SMC"); 1339 MODULE_LICENSE("GPL v2"); 1340