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