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 */ 83 static const char* temperature_sensors_sets[][13] = { 84 /* Set 0: Macbook Pro */ 85 { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H", 86 "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL }, 87 /* Set 1: Macbook set */ 88 { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S", 89 "Th1H", "Ts0P", NULL }, 90 /* Set 2: Macmini set */ 91 { "TC0D", "TC0P", NULL } 92 }; 93 94 /* List of keys used to read/write fan speeds */ 95 static const char* fan_speed_keys[] = { 96 FAN_ACTUAL_SPEED, 97 FAN_MIN_SPEED, 98 FAN_MAX_SPEED, 99 FAN_SAFE_SPEED, 100 FAN_TARGET_SPEED 101 }; 102 103 #define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ 104 #define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ 105 106 #define APPLESMC_POLL_PERIOD (HZ/20) /* poll for input every 1/20s */ 107 #define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ 108 #define APPLESMC_INPUT_FLAT 4 109 110 #define SENSOR_X 0 111 #define SENSOR_Y 1 112 #define SENSOR_Z 2 113 114 /* Structure to be passed to DMI_MATCH function */ 115 struct dmi_match_data { 116 /* Indicates whether this computer has an accelerometer. */ 117 int accelerometer; 118 /* Indicates whether this computer has light sensors and keyboard backlight. */ 119 int light; 120 /* Indicates which temperature sensors set to use. */ 121 int temperature_set; 122 }; 123 124 static const int debug; 125 static struct platform_device *pdev; 126 static s16 rest_x; 127 static s16 rest_y; 128 static struct timer_list applesmc_timer; 129 static struct input_dev *applesmc_idev; 130 static struct class_device *hwmon_class_dev; 131 132 /* Indicates whether this computer has an accelerometer. */ 133 static unsigned int applesmc_accelerometer; 134 135 /* Indicates whether this computer has light sensors and keyboard backlight. */ 136 static unsigned int applesmc_light; 137 138 /* Indicates which temperature sensors set to use. */ 139 static unsigned int applesmc_temperature_set; 140 141 static struct mutex applesmc_lock; 142 143 /* 144 * Last index written to key_at_index sysfs file, and value to use for all other 145 * key_at_index_* sysfs files. 146 */ 147 static unsigned int key_at_index; 148 149 static struct workqueue_struct *applesmc_led_wq; 150 151 /* 152 * __wait_status - Wait up to 2ms for the status port to get a certain value 153 * (masked with 0x0f), returning zero if the value is obtained. Callers must 154 * hold applesmc_lock. 155 */ 156 static int __wait_status(u8 val) 157 { 158 unsigned int i; 159 160 val = val & APPLESMC_STATUS_MASK; 161 162 for (i = 0; i < 200; i++) { 163 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) { 164 if (debug) 165 printk(KERN_DEBUG 166 "Waited %d us for status %x\n", 167 i*10, val); 168 return 0; 169 } 170 udelay(10); 171 } 172 173 printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n", 174 val, inb(APPLESMC_CMD_PORT)); 175 176 return -EIO; 177 } 178 179 /* 180 * applesmc_read_key - reads len bytes from a given key, and put them in buffer. 181 * Returns zero on success or a negative error on failure. Callers must 182 * hold applesmc_lock. 183 */ 184 static int applesmc_read_key(const char* key, u8* buffer, u8 len) 185 { 186 int i; 187 188 if (len > APPLESMC_MAX_DATA_LENGTH) { 189 printk(KERN_ERR "applesmc_read_key: cannot read more than " 190 "%d bytes\n", APPLESMC_MAX_DATA_LENGTH); 191 return -EINVAL; 192 } 193 194 outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT); 195 if (__wait_status(0x0c)) 196 return -EIO; 197 198 for (i = 0; i < 4; i++) { 199 outb(key[i], APPLESMC_DATA_PORT); 200 if (__wait_status(0x04)) 201 return -EIO; 202 } 203 if (debug) 204 printk(KERN_DEBUG "<%s", key); 205 206 outb(len, APPLESMC_DATA_PORT); 207 if (debug) 208 printk(KERN_DEBUG ">%x", len); 209 210 for (i = 0; i < len; i++) { 211 if (__wait_status(0x05)) 212 return -EIO; 213 buffer[i] = inb(APPLESMC_DATA_PORT); 214 if (debug) 215 printk(KERN_DEBUG "<%x", buffer[i]); 216 } 217 if (debug) 218 printk(KERN_DEBUG "\n"); 219 220 return 0; 221 } 222 223 /* 224 * applesmc_write_key - writes len bytes from buffer to a given key. 225 * Returns zero on success or a negative error on failure. Callers must 226 * hold applesmc_lock. 227 */ 228 static int applesmc_write_key(const char* key, u8* buffer, u8 len) 229 { 230 int i; 231 232 if (len > APPLESMC_MAX_DATA_LENGTH) { 233 printk(KERN_ERR "applesmc_write_key: cannot write more than " 234 "%d bytes\n", APPLESMC_MAX_DATA_LENGTH); 235 return -EINVAL; 236 } 237 238 outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT); 239 if (__wait_status(0x0c)) 240 return -EIO; 241 242 for (i = 0; i < 4; i++) { 243 outb(key[i], APPLESMC_DATA_PORT); 244 if (__wait_status(0x04)) 245 return -EIO; 246 } 247 248 outb(len, APPLESMC_DATA_PORT); 249 250 for (i = 0; i < len; i++) { 251 if (__wait_status(0x04)) 252 return -EIO; 253 outb(buffer[i], APPLESMC_DATA_PORT); 254 } 255 256 return 0; 257 } 258 259 /* 260 * applesmc_get_key_at_index - get key at index, and put the result in key 261 * (char[6]). Returns zero on success or a negative error on failure. Callers 262 * must hold applesmc_lock. 263 */ 264 static int applesmc_get_key_at_index(int index, char* key) 265 { 266 int i; 267 u8 readkey[4]; 268 readkey[0] = index >> 24; 269 readkey[1] = index >> 16; 270 readkey[2] = index >> 8; 271 readkey[3] = index; 272 273 outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT); 274 if (__wait_status(0x0c)) 275 return -EIO; 276 277 for (i = 0; i < 4; i++) { 278 outb(readkey[i], APPLESMC_DATA_PORT); 279 if (__wait_status(0x04)) 280 return -EIO; 281 } 282 283 outb(4, APPLESMC_DATA_PORT); 284 285 for (i = 0; i < 4; i++) { 286 if (__wait_status(0x05)) 287 return -EIO; 288 key[i] = inb(APPLESMC_DATA_PORT); 289 } 290 key[4] = 0; 291 292 return 0; 293 } 294 295 /* 296 * applesmc_get_key_type - get key type, and put the result in type (char[6]). 297 * Returns zero on success or a negative error on failure. Callers must 298 * hold applesmc_lock. 299 */ 300 static int applesmc_get_key_type(char* key, char* type) 301 { 302 int i; 303 304 outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT); 305 if (__wait_status(0x0c)) 306 return -EIO; 307 308 for (i = 0; i < 4; i++) { 309 outb(key[i], APPLESMC_DATA_PORT); 310 if (__wait_status(0x04)) 311 return -EIO; 312 } 313 314 outb(5, APPLESMC_DATA_PORT); 315 316 for (i = 0; i < 6; i++) { 317 if (__wait_status(0x05)) 318 return -EIO; 319 type[i] = inb(APPLESMC_DATA_PORT); 320 } 321 type[5] = 0; 322 323 return 0; 324 } 325 326 /* 327 * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must 328 * hold applesmc_lock. 329 */ 330 static int applesmc_read_motion_sensor(int index, s16* value) 331 { 332 u8 buffer[2]; 333 int ret; 334 335 switch (index) { 336 case SENSOR_X: 337 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2); 338 break; 339 case SENSOR_Y: 340 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2); 341 break; 342 case SENSOR_Z: 343 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2); 344 break; 345 default: 346 ret = -EINVAL; 347 } 348 349 *value = ((s16)buffer[0] << 8) | buffer[1]; 350 351 return ret; 352 } 353 354 /* 355 * applesmc_device_init - initialize the accelerometer. Returns zero on success 356 * and negative error code on failure. Can sleep. 357 */ 358 static int applesmc_device_init(void) 359 { 360 int total, ret = -ENXIO; 361 u8 buffer[2]; 362 363 if (!applesmc_accelerometer) 364 return 0; 365 366 mutex_lock(&applesmc_lock); 367 368 for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { 369 if (debug) 370 printk(KERN_DEBUG "applesmc try %d\n", total); 371 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && 372 (buffer[0] != 0x00 || buffer[1] != 0x00)) { 373 if (total == INIT_TIMEOUT_MSECS) { 374 printk(KERN_DEBUG "applesmc: device has" 375 " already been initialized" 376 " (0x%02x, 0x%02x).\n", 377 buffer[0], buffer[1]); 378 } else { 379 printk(KERN_DEBUG "applesmc: device" 380 " successfully initialized" 381 " (0x%02x, 0x%02x).\n", 382 buffer[0], buffer[1]); 383 } 384 ret = 0; 385 goto out; 386 } 387 buffer[0] = 0xe0; 388 buffer[1] = 0x00; 389 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); 390 msleep(INIT_WAIT_MSECS); 391 } 392 393 printk(KERN_WARNING "applesmc: failed to init the device\n"); 394 395 out: 396 mutex_unlock(&applesmc_lock); 397 return ret; 398 } 399 400 /* 401 * applesmc_get_fan_count - get the number of fans. Callers must NOT hold 402 * applesmc_lock. 403 */ 404 static int applesmc_get_fan_count(void) 405 { 406 int ret; 407 u8 buffer[1]; 408 409 mutex_lock(&applesmc_lock); 410 411 ret = applesmc_read_key(FANS_COUNT, buffer, 1); 412 413 mutex_unlock(&applesmc_lock); 414 if (ret) 415 return ret; 416 else 417 return buffer[0]; 418 } 419 420 /* Device model stuff */ 421 static int applesmc_probe(struct platform_device *dev) 422 { 423 int ret; 424 425 ret = applesmc_device_init(); 426 if (ret) 427 return ret; 428 429 printk(KERN_INFO "applesmc: device successfully initialized.\n"); 430 return 0; 431 } 432 433 static int applesmc_resume(struct platform_device *dev) 434 { 435 return applesmc_device_init(); 436 } 437 438 static struct platform_driver applesmc_driver = { 439 .probe = applesmc_probe, 440 .resume = applesmc_resume, 441 .driver = { 442 .name = "applesmc", 443 .owner = THIS_MODULE, 444 }, 445 }; 446 447 /* 448 * applesmc_calibrate - Set our "resting" values. Callers must 449 * hold applesmc_lock. 450 */ 451 static void applesmc_calibrate(void) 452 { 453 applesmc_read_motion_sensor(SENSOR_X, &rest_x); 454 applesmc_read_motion_sensor(SENSOR_Y, &rest_y); 455 rest_x = -rest_x; 456 } 457 458 static int applesmc_idev_open(struct input_dev *dev) 459 { 460 add_timer(&applesmc_timer); 461 462 return 0; 463 } 464 465 static void applesmc_idev_close(struct input_dev *dev) 466 { 467 del_timer_sync(&applesmc_timer); 468 } 469 470 static void applesmc_idev_poll(unsigned long unused) 471 { 472 s16 x, y; 473 474 /* Cannot sleep. Try nonblockingly. If we fail, try again later. */ 475 if (!mutex_trylock(&applesmc_lock)) { 476 mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD); 477 return; 478 } 479 480 if (applesmc_read_motion_sensor(SENSOR_X, &x)) 481 goto out; 482 if (applesmc_read_motion_sensor(SENSOR_Y, &y)) 483 goto out; 484 485 x = -x; 486 input_report_abs(applesmc_idev, ABS_X, x - rest_x); 487 input_report_abs(applesmc_idev, ABS_Y, y - rest_y); 488 input_sync(applesmc_idev); 489 490 out: 491 mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD); 492 493 mutex_unlock(&applesmc_lock); 494 } 495 496 /* Sysfs Files */ 497 498 static ssize_t applesmc_name_show(struct device *dev, 499 struct device_attribute *attr, char *buf) 500 { 501 return snprintf(buf, PAGE_SIZE, "applesmc\n"); 502 } 503 504 static ssize_t applesmc_position_show(struct device *dev, 505 struct device_attribute *attr, char *buf) 506 { 507 int ret; 508 s16 x, y, z; 509 510 mutex_lock(&applesmc_lock); 511 512 ret = applesmc_read_motion_sensor(SENSOR_X, &x); 513 if (ret) 514 goto out; 515 ret = applesmc_read_motion_sensor(SENSOR_Y, &y); 516 if (ret) 517 goto out; 518 ret = applesmc_read_motion_sensor(SENSOR_Z, &z); 519 if (ret) 520 goto out; 521 522 out: 523 mutex_unlock(&applesmc_lock); 524 if (ret) 525 return ret; 526 else 527 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); 528 } 529 530 static ssize_t applesmc_light_show(struct device *dev, 531 struct device_attribute *attr, char *sysfsbuf) 532 { 533 int ret; 534 u8 left = 0, right = 0; 535 u8 buffer[6]; 536 537 mutex_lock(&applesmc_lock); 538 539 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6); 540 left = buffer[2]; 541 if (ret) 542 goto out; 543 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6); 544 right = buffer[2]; 545 546 out: 547 mutex_unlock(&applesmc_lock); 548 if (ret) 549 return ret; 550 else 551 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); 552 } 553 554 /* Displays degree Celsius * 1000 */ 555 static ssize_t applesmc_show_temperature(struct device *dev, 556 struct device_attribute *devattr, char *sysfsbuf) 557 { 558 int ret; 559 u8 buffer[2]; 560 unsigned int temp; 561 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 562 const char* key = 563 temperature_sensors_sets[applesmc_temperature_set][attr->index]; 564 565 mutex_lock(&applesmc_lock); 566 567 ret = applesmc_read_key(key, buffer, 2); 568 temp = buffer[0]*1000; 569 temp += (buffer[1] >> 6) * 250; 570 571 mutex_unlock(&applesmc_lock); 572 573 if (ret) 574 return ret; 575 else 576 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp); 577 } 578 579 static ssize_t applesmc_show_fan_speed(struct device *dev, 580 struct device_attribute *attr, char *sysfsbuf) 581 { 582 int ret; 583 unsigned int speed = 0; 584 char newkey[5]; 585 u8 buffer[2]; 586 struct sensor_device_attribute_2 *sensor_attr = 587 to_sensor_dev_attr_2(attr); 588 589 newkey[0] = fan_speed_keys[sensor_attr->nr][0]; 590 newkey[1] = '0' + sensor_attr->index; 591 newkey[2] = fan_speed_keys[sensor_attr->nr][2]; 592 newkey[3] = fan_speed_keys[sensor_attr->nr][3]; 593 newkey[4] = 0; 594 595 mutex_lock(&applesmc_lock); 596 597 ret = applesmc_read_key(newkey, buffer, 2); 598 speed = ((buffer[0] << 8 | buffer[1]) >> 2); 599 600 mutex_unlock(&applesmc_lock); 601 if (ret) 602 return ret; 603 else 604 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); 605 } 606 607 static ssize_t applesmc_store_fan_speed(struct device *dev, 608 struct device_attribute *attr, 609 const char *sysfsbuf, size_t count) 610 { 611 int ret; 612 u32 speed; 613 char newkey[5]; 614 u8 buffer[2]; 615 struct sensor_device_attribute_2 *sensor_attr = 616 to_sensor_dev_attr_2(attr); 617 618 speed = simple_strtoul(sysfsbuf, NULL, 10); 619 620 if (speed > 0x4000) /* Bigger than a 14-bit value */ 621 return -EINVAL; 622 623 newkey[0] = fan_speed_keys[sensor_attr->nr][0]; 624 newkey[1] = '0' + sensor_attr->index; 625 newkey[2] = fan_speed_keys[sensor_attr->nr][2]; 626 newkey[3] = fan_speed_keys[sensor_attr->nr][3]; 627 newkey[4] = 0; 628 629 mutex_lock(&applesmc_lock); 630 631 buffer[0] = (speed >> 6) & 0xff; 632 buffer[1] = (speed << 2) & 0xff; 633 ret = applesmc_write_key(newkey, buffer, 2); 634 635 mutex_unlock(&applesmc_lock); 636 if (ret) 637 return ret; 638 else 639 return count; 640 } 641 642 static ssize_t applesmc_show_fan_manual(struct device *dev, 643 struct device_attribute *devattr, char *sysfsbuf) 644 { 645 int ret; 646 u16 manual = 0; 647 u8 buffer[2]; 648 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 649 650 mutex_lock(&applesmc_lock); 651 652 ret = applesmc_read_key(FANS_MANUAL, buffer, 2); 653 manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01; 654 655 mutex_unlock(&applesmc_lock); 656 if (ret) 657 return ret; 658 else 659 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); 660 } 661 662 static ssize_t applesmc_store_fan_manual(struct device *dev, 663 struct device_attribute *devattr, 664 const char *sysfsbuf, size_t count) 665 { 666 int ret; 667 u8 buffer[2]; 668 u32 input; 669 u16 val; 670 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 671 672 input = simple_strtoul(sysfsbuf, NULL, 10); 673 674 mutex_lock(&applesmc_lock); 675 676 ret = applesmc_read_key(FANS_MANUAL, buffer, 2); 677 val = (buffer[0] << 8 | buffer[1]); 678 if (ret) 679 goto out; 680 681 if (input) 682 val = val | (0x01 << attr->index); 683 else 684 val = val & ~(0x01 << attr->index); 685 686 buffer[0] = (val >> 8) & 0xFF; 687 buffer[1] = val & 0xFF; 688 689 ret = applesmc_write_key(FANS_MANUAL, buffer, 2); 690 691 out: 692 mutex_unlock(&applesmc_lock); 693 if (ret) 694 return ret; 695 else 696 return count; 697 } 698 699 static ssize_t applesmc_show_fan_position(struct device *dev, 700 struct device_attribute *attr, char *sysfsbuf) 701 { 702 int ret; 703 char newkey[5]; 704 u8 buffer[17]; 705 struct sensor_device_attribute_2 *sensor_attr = 706 to_sensor_dev_attr_2(attr); 707 708 newkey[0] = FAN_POSITION[0]; 709 newkey[1] = '0' + sensor_attr->index; 710 newkey[2] = FAN_POSITION[2]; 711 newkey[3] = FAN_POSITION[3]; 712 newkey[4] = 0; 713 714 mutex_lock(&applesmc_lock); 715 716 ret = applesmc_read_key(newkey, buffer, 16); 717 buffer[16] = 0; 718 719 mutex_unlock(&applesmc_lock); 720 if (ret) 721 return ret; 722 else 723 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); 724 } 725 726 static ssize_t applesmc_calibrate_show(struct device *dev, 727 struct device_attribute *attr, char *sysfsbuf) 728 { 729 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); 730 } 731 732 static ssize_t applesmc_calibrate_store(struct device *dev, 733 struct device_attribute *attr, const char *sysfsbuf, size_t count) 734 { 735 mutex_lock(&applesmc_lock); 736 applesmc_calibrate(); 737 mutex_unlock(&applesmc_lock); 738 739 return count; 740 } 741 742 /* Store the next backlight value to be written by the work */ 743 static unsigned int backlight_value; 744 745 static void applesmc_backlight_set(struct work_struct *work) 746 { 747 u8 buffer[2]; 748 749 mutex_lock(&applesmc_lock); 750 buffer[0] = backlight_value; 751 buffer[1] = 0x00; 752 applesmc_write_key(BACKLIGHT_KEY, buffer, 2); 753 mutex_unlock(&applesmc_lock); 754 } 755 static DECLARE_WORK(backlight_work, &applesmc_backlight_set); 756 757 static void applesmc_brightness_set(struct led_classdev *led_cdev, 758 enum led_brightness value) 759 { 760 int ret; 761 762 backlight_value = value; 763 ret = queue_work(applesmc_led_wq, &backlight_work); 764 765 if (debug && (!ret)) 766 printk(KERN_DEBUG "applesmc: work was already on the queue.\n"); 767 } 768 769 static ssize_t applesmc_key_count_show(struct device *dev, 770 struct device_attribute *attr, char *sysfsbuf) 771 { 772 int ret; 773 u8 buffer[4]; 774 u32 count; 775 776 mutex_lock(&applesmc_lock); 777 778 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); 779 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + 780 ((u32)buffer[2]<<8) + buffer[3]; 781 782 mutex_unlock(&applesmc_lock); 783 if (ret) 784 return ret; 785 else 786 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); 787 } 788 789 static ssize_t applesmc_key_at_index_read_show(struct device *dev, 790 struct device_attribute *attr, char *sysfsbuf) 791 { 792 char key[5]; 793 char info[6]; 794 int ret; 795 796 mutex_lock(&applesmc_lock); 797 798 ret = applesmc_get_key_at_index(key_at_index, key); 799 800 if (ret || !key[0]) { 801 mutex_unlock(&applesmc_lock); 802 803 return -EINVAL; 804 } 805 806 ret = applesmc_get_key_type(key, info); 807 808 if (ret) { 809 mutex_unlock(&applesmc_lock); 810 811 return ret; 812 } 813 814 /* 815 * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than 816 * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf. 817 */ 818 ret = applesmc_read_key(key, sysfsbuf, info[0]); 819 820 mutex_unlock(&applesmc_lock); 821 822 if (!ret) { 823 return info[0]; 824 } 825 else { 826 return ret; 827 } 828 } 829 830 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, 831 struct device_attribute *attr, char *sysfsbuf) 832 { 833 char key[5]; 834 char info[6]; 835 int ret; 836 837 mutex_lock(&applesmc_lock); 838 839 ret = applesmc_get_key_at_index(key_at_index, key); 840 841 if (ret || !key[0]) { 842 mutex_unlock(&applesmc_lock); 843 844 return -EINVAL; 845 } 846 847 ret = applesmc_get_key_type(key, info); 848 849 mutex_unlock(&applesmc_lock); 850 851 if (!ret) 852 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]); 853 else 854 return ret; 855 } 856 857 static ssize_t applesmc_key_at_index_type_show(struct device *dev, 858 struct device_attribute *attr, char *sysfsbuf) 859 { 860 char key[5]; 861 char info[6]; 862 int ret; 863 864 mutex_lock(&applesmc_lock); 865 866 ret = applesmc_get_key_at_index(key_at_index, key); 867 868 if (ret || !key[0]) { 869 mutex_unlock(&applesmc_lock); 870 871 return -EINVAL; 872 } 873 874 ret = applesmc_get_key_type(key, info); 875 876 mutex_unlock(&applesmc_lock); 877 878 if (!ret) 879 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1); 880 else 881 return ret; 882 } 883 884 static ssize_t applesmc_key_at_index_name_show(struct device *dev, 885 struct device_attribute *attr, char *sysfsbuf) 886 { 887 char key[5]; 888 int ret; 889 890 mutex_lock(&applesmc_lock); 891 892 ret = applesmc_get_key_at_index(key_at_index, key); 893 894 mutex_unlock(&applesmc_lock); 895 896 if (!ret && key[0]) 897 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key); 898 else 899 return -EINVAL; 900 } 901 902 static ssize_t applesmc_key_at_index_show(struct device *dev, 903 struct device_attribute *attr, char *sysfsbuf) 904 { 905 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); 906 } 907 908 static ssize_t applesmc_key_at_index_store(struct device *dev, 909 struct device_attribute *attr, const char *sysfsbuf, size_t count) 910 { 911 mutex_lock(&applesmc_lock); 912 913 key_at_index = simple_strtoul(sysfsbuf, NULL, 10); 914 915 mutex_unlock(&applesmc_lock); 916 917 return count; 918 } 919 920 static struct led_classdev applesmc_backlight = { 921 .name = "smc:kbd_backlight", 922 .default_trigger = "nand-disk", 923 .brightness_set = applesmc_brightness_set, 924 }; 925 926 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL); 927 928 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL); 929 static DEVICE_ATTR(calibrate, 0644, 930 applesmc_calibrate_show, applesmc_calibrate_store); 931 932 static struct attribute *accelerometer_attributes[] = { 933 &dev_attr_position.attr, 934 &dev_attr_calibrate.attr, 935 NULL 936 }; 937 938 static const struct attribute_group accelerometer_attributes_group = 939 { .attrs = accelerometer_attributes }; 940 941 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL); 942 943 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL); 944 static DEVICE_ATTR(key_at_index, 0644, 945 applesmc_key_at_index_show, applesmc_key_at_index_store); 946 static DEVICE_ATTR(key_at_index_name, 0444, 947 applesmc_key_at_index_name_show, NULL); 948 static DEVICE_ATTR(key_at_index_type, 0444, 949 applesmc_key_at_index_type_show, NULL); 950 static DEVICE_ATTR(key_at_index_data_length, 0444, 951 applesmc_key_at_index_data_length_show, NULL); 952 static DEVICE_ATTR(key_at_index_data, 0444, 953 applesmc_key_at_index_read_show, NULL); 954 955 static struct attribute *key_enumeration_attributes[] = { 956 &dev_attr_key_count.attr, 957 &dev_attr_key_at_index.attr, 958 &dev_attr_key_at_index_name.attr, 959 &dev_attr_key_at_index_type.attr, 960 &dev_attr_key_at_index_data_length.attr, 961 &dev_attr_key_at_index_data.attr, 962 NULL 963 }; 964 965 static const struct attribute_group key_enumeration_group = 966 { .attrs = key_enumeration_attributes }; 967 968 /* 969 * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries. 970 * - show actual speed 971 * - show/store minimum speed 972 * - show maximum speed 973 * - show safe speed 974 * - show/store target speed 975 * - show/store manual mode 976 */ 977 #define sysfs_fan_speeds_offset(offset) \ 978 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \ 979 applesmc_show_fan_speed, NULL, 0, offset-1); \ 980 \ 981 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \ 982 applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \ 983 \ 984 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \ 985 applesmc_show_fan_speed, NULL, 2, offset-1); \ 986 \ 987 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \ 988 applesmc_show_fan_speed, NULL, 3, offset-1); \ 989 \ 990 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \ 991 applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \ 992 \ 993 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \ 994 applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \ 995 \ 996 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \ 997 applesmc_show_fan_position, NULL, offset-1); \ 998 \ 999 static struct attribute *fan##offset##_attributes[] = { \ 1000 &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \ 1001 &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \ 1002 &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \ 1003 &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \ 1004 &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \ 1005 &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \ 1006 &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \ 1007 NULL \ 1008 }; 1009 1010 /* 1011 * Create the needed functions for each fan using the macro defined above 1012 * (2 fans are supported) 1013 */ 1014 sysfs_fan_speeds_offset(1); 1015 sysfs_fan_speeds_offset(2); 1016 1017 static const struct attribute_group fan_attribute_groups[] = { 1018 { .attrs = fan1_attributes }, 1019 { .attrs = fan2_attributes } 1020 }; 1021 1022 /* 1023 * Temperature sensors sysfs entries. 1024 */ 1025 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, 1026 applesmc_show_temperature, NULL, 0); 1027 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, 1028 applesmc_show_temperature, NULL, 1); 1029 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, 1030 applesmc_show_temperature, NULL, 2); 1031 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, 1032 applesmc_show_temperature, NULL, 3); 1033 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, 1034 applesmc_show_temperature, NULL, 4); 1035 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, 1036 applesmc_show_temperature, NULL, 5); 1037 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, 1038 applesmc_show_temperature, NULL, 6); 1039 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, 1040 applesmc_show_temperature, NULL, 7); 1041 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, 1042 applesmc_show_temperature, NULL, 8); 1043 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, 1044 applesmc_show_temperature, NULL, 9); 1045 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, 1046 applesmc_show_temperature, NULL, 10); 1047 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, 1048 applesmc_show_temperature, NULL, 11); 1049 1050 static struct attribute *temperature_attributes[] = { 1051 &sensor_dev_attr_temp1_input.dev_attr.attr, 1052 &sensor_dev_attr_temp2_input.dev_attr.attr, 1053 &sensor_dev_attr_temp3_input.dev_attr.attr, 1054 &sensor_dev_attr_temp4_input.dev_attr.attr, 1055 &sensor_dev_attr_temp5_input.dev_attr.attr, 1056 &sensor_dev_attr_temp6_input.dev_attr.attr, 1057 &sensor_dev_attr_temp7_input.dev_attr.attr, 1058 &sensor_dev_attr_temp8_input.dev_attr.attr, 1059 &sensor_dev_attr_temp9_input.dev_attr.attr, 1060 &sensor_dev_attr_temp10_input.dev_attr.attr, 1061 &sensor_dev_attr_temp11_input.dev_attr.attr, 1062 &sensor_dev_attr_temp12_input.dev_attr.attr, 1063 NULL 1064 }; 1065 1066 static const struct attribute_group temperature_attributes_group = 1067 { .attrs = temperature_attributes }; 1068 1069 /* Module stuff */ 1070 1071 /* 1072 * applesmc_dmi_match - found a match. return one, short-circuiting the hunt. 1073 */ 1074 static int applesmc_dmi_match(const struct dmi_system_id *id) 1075 { 1076 int i = 0; 1077 struct dmi_match_data* dmi_data = id->driver_data; 1078 printk(KERN_INFO "applesmc: %s detected:\n", id->ident); 1079 applesmc_accelerometer = dmi_data->accelerometer; 1080 printk(KERN_INFO "applesmc: - Model %s accelerometer\n", 1081 applesmc_accelerometer ? "with" : "without"); 1082 applesmc_light = dmi_data->light; 1083 printk(KERN_INFO "applesmc: - Model %s light sensors and backlight\n", 1084 applesmc_light ? "with" : "without"); 1085 1086 applesmc_temperature_set = dmi_data->temperature_set; 1087 while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL) 1088 i++; 1089 printk(KERN_INFO "applesmc: - Model with %d temperature sensors\n", i); 1090 return 1; 1091 } 1092 1093 /* Create accelerometer ressources */ 1094 static int applesmc_create_accelerometer(void) 1095 { 1096 int ret; 1097 1098 ret = sysfs_create_group(&pdev->dev.kobj, 1099 &accelerometer_attributes_group); 1100 if (ret) 1101 goto out; 1102 1103 applesmc_idev = input_allocate_device(); 1104 if (!applesmc_idev) { 1105 ret = -ENOMEM; 1106 goto out_sysfs; 1107 } 1108 1109 /* initial calibrate for the input device */ 1110 applesmc_calibrate(); 1111 1112 /* initialize the input class */ 1113 applesmc_idev->name = "applesmc"; 1114 applesmc_idev->id.bustype = BUS_HOST; 1115 applesmc_idev->dev.parent = &pdev->dev; 1116 applesmc_idev->evbit[0] = BIT(EV_ABS); 1117 applesmc_idev->open = applesmc_idev_open; 1118 applesmc_idev->close = applesmc_idev_close; 1119 input_set_abs_params(applesmc_idev, ABS_X, 1120 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); 1121 input_set_abs_params(applesmc_idev, ABS_Y, 1122 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); 1123 1124 ret = input_register_device(applesmc_idev); 1125 if (ret) 1126 goto out_idev; 1127 1128 /* start up our timer for the input device */ 1129 init_timer(&applesmc_timer); 1130 applesmc_timer.function = applesmc_idev_poll; 1131 applesmc_timer.expires = jiffies + APPLESMC_POLL_PERIOD; 1132 1133 return 0; 1134 1135 out_idev: 1136 input_free_device(applesmc_idev); 1137 1138 out_sysfs: 1139 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group); 1140 1141 out: 1142 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret); 1143 return ret; 1144 } 1145 1146 /* Release all ressources used by the accelerometer */ 1147 static void applesmc_release_accelerometer(void) 1148 { 1149 del_timer_sync(&applesmc_timer); 1150 input_unregister_device(applesmc_idev); 1151 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group); 1152 } 1153 1154 static __initdata struct dmi_match_data applesmc_dmi_data[] = { 1155 /* MacBook Pro: accelerometer, backlight and temperature set 0 */ 1156 { .accelerometer = 1, .light = 1, .temperature_set = 0 }, 1157 /* MacBook: accelerometer and temperature set 1 */ 1158 { .accelerometer = 1, .light = 0, .temperature_set = 1 }, 1159 /* MacMini: temperature set 2 */ 1160 { .accelerometer = 0, .light = 0, .temperature_set = 2 }, 1161 }; 1162 1163 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". 1164 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */ 1165 static __initdata struct dmi_system_id applesmc_whitelist[] = { 1166 { applesmc_dmi_match, "Apple MacBook Pro", { 1167 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1168 DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") }, 1169 (void*)&applesmc_dmi_data[0]}, 1170 { applesmc_dmi_match, "Apple MacBook", { 1171 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1172 DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") }, 1173 (void*)&applesmc_dmi_data[1]}, 1174 { applesmc_dmi_match, "Apple Macmini", { 1175 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), 1176 DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") }, 1177 (void*)&applesmc_dmi_data[2]}, 1178 { .ident = NULL } 1179 }; 1180 1181 static int __init applesmc_init(void) 1182 { 1183 int ret; 1184 int count; 1185 int i; 1186 1187 mutex_init(&applesmc_lock); 1188 1189 if (!dmi_check_system(applesmc_whitelist)) { 1190 printk(KERN_WARNING "applesmc: supported laptop not found!\n"); 1191 ret = -ENODEV; 1192 goto out; 1193 } 1194 1195 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, 1196 "applesmc")) { 1197 ret = -ENXIO; 1198 goto out; 1199 } 1200 1201 ret = platform_driver_register(&applesmc_driver); 1202 if (ret) 1203 goto out_region; 1204 1205 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, 1206 NULL, 0); 1207 if (IS_ERR(pdev)) { 1208 ret = PTR_ERR(pdev); 1209 goto out_driver; 1210 } 1211 1212 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr); 1213 if (ret) 1214 goto out_device; 1215 1216 /* Create key enumeration sysfs files */ 1217 ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group); 1218 if (ret) 1219 goto out_name; 1220 1221 /* create fan files */ 1222 count = applesmc_get_fan_count(); 1223 if (count < 0) { 1224 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n"); 1225 } else { 1226 printk(KERN_INFO "applesmc: %d fans found.\n", count); 1227 1228 switch (count) { 1229 default: 1230 printk(KERN_WARNING "applesmc: More than 2 fans found," 1231 " but at most 2 fans are supported" 1232 " by the driver.\n"); 1233 case 2: 1234 ret = sysfs_create_group(&pdev->dev.kobj, 1235 &fan_attribute_groups[1]); 1236 if (ret) 1237 goto out_key_enumeration; 1238 case 1: 1239 ret = sysfs_create_group(&pdev->dev.kobj, 1240 &fan_attribute_groups[0]); 1241 if (ret) 1242 goto out_fan_1; 1243 case 0: 1244 ; 1245 } 1246 } 1247 1248 for (i = 0; 1249 temperature_sensors_sets[applesmc_temperature_set][i] != NULL; 1250 i++) { 1251 if (temperature_attributes[i] == NULL) { 1252 printk(KERN_ERR "applesmc: More temperature sensors " 1253 "in temperature_sensors_sets (at least %i)" 1254 "than available sysfs files in " 1255 "temperature_attributes (%i), please report " 1256 "this bug.\n", i, i-1); 1257 goto out_temperature; 1258 } 1259 ret = sysfs_create_file(&pdev->dev.kobj, 1260 temperature_attributes[i]); 1261 if (ret) 1262 goto out_temperature; 1263 } 1264 1265 if (applesmc_accelerometer) { 1266 ret = applesmc_create_accelerometer(); 1267 if (ret) 1268 goto out_temperature; 1269 } 1270 1271 if (applesmc_light) { 1272 /* Add light sensor file */ 1273 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr); 1274 if (ret) 1275 goto out_accelerometer; 1276 1277 /* Create the workqueue */ 1278 applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); 1279 if (!applesmc_led_wq) { 1280 ret = -ENOMEM; 1281 goto out_light_sysfs; 1282 } 1283 1284 /* register as a led device */ 1285 ret = led_classdev_register(&pdev->dev, &applesmc_backlight); 1286 if (ret < 0) 1287 goto out_light_wq; 1288 } 1289 1290 hwmon_class_dev = hwmon_device_register(&pdev->dev); 1291 if (IS_ERR(hwmon_class_dev)) { 1292 ret = PTR_ERR(hwmon_class_dev); 1293 goto out_light_ledclass; 1294 } 1295 1296 printk(KERN_INFO "applesmc: driver successfully loaded.\n"); 1297 1298 return 0; 1299 1300 out_light_ledclass: 1301 if (applesmc_light) 1302 led_classdev_unregister(&applesmc_backlight); 1303 out_light_wq: 1304 if (applesmc_light) 1305 destroy_workqueue(applesmc_led_wq); 1306 out_light_sysfs: 1307 if (applesmc_light) 1308 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr); 1309 out_accelerometer: 1310 if (applesmc_accelerometer) 1311 applesmc_release_accelerometer(); 1312 out_temperature: 1313 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group); 1314 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]); 1315 out_fan_1: 1316 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]); 1317 out_key_enumeration: 1318 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); 1319 out_name: 1320 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); 1321 out_device: 1322 platform_device_unregister(pdev); 1323 out_driver: 1324 platform_driver_unregister(&applesmc_driver); 1325 out_region: 1326 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); 1327 out: 1328 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret); 1329 return ret; 1330 } 1331 1332 static void __exit applesmc_exit(void) 1333 { 1334 hwmon_device_unregister(hwmon_class_dev); 1335 if (applesmc_light) { 1336 led_classdev_unregister(&applesmc_backlight); 1337 destroy_workqueue(applesmc_led_wq); 1338 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr); 1339 } 1340 if (applesmc_accelerometer) 1341 applesmc_release_accelerometer(); 1342 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group); 1343 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]); 1344 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]); 1345 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); 1346 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); 1347 platform_device_unregister(pdev); 1348 platform_driver_unregister(&applesmc_driver); 1349 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); 1350 1351 printk(KERN_INFO "applesmc: driver unloaded.\n"); 1352 } 1353 1354 module_init(applesmc_init); 1355 module_exit(applesmc_exit); 1356 1357 MODULE_AUTHOR("Nicolas Boichat"); 1358 MODULE_DESCRIPTION("Apple SMC"); 1359 MODULE_LICENSE("GPL v2"); 1360