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