1 /* 2 * Panasonic HotKey and LCD brightness control driver 3 * (C) 2004 Hiroshi Miura <miura@da-cha.org> 4 * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/ 5 * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp> 6 * (C) 2004 David Bronaugh <dbronaugh> 7 * (C) 2006-2008 Harald Welte <laforge@gnumonks.org> 8 * 9 * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * publicshed by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 *--------------------------------------------------------------------------- 25 * 26 * ChangeLog: 27 * Sep.23, 2008 Harald Welte <laforge@gnumonks.org> 28 * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to 29 * drivers/misc/panasonic-laptop.c 30 * 31 * Jul.04, 2008 Harald Welte <laforge@gnumonks.org> 32 * -v0.94 replace /proc interface with device attributes 33 * support {set,get}keycode on th input device 34 * 35 * Jun.27, 2008 Harald Welte <laforge@gnumonks.org> 36 * -v0.92 merge with 2.6.26-rc6 input API changes 37 * remove broken <= 2.6.15 kernel support 38 * resolve all compiler warnings 39 * various coding style fixes (checkpatch.pl) 40 * add support for backlight api 41 * major code restructuring 42 * 43 * Dac.28, 2007 Harald Welte <laforge@gnumonks.org> 44 * -v0.91 merge with 2.6.24-rc6 ACPI changes 45 * 46 * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org> 47 * -v0.9 remove warning about section reference. 48 * remove acpi_os_free 49 * add /proc/acpi/pcc/brightness interface for HAL access 50 * merge dbronaugh's enhancement 51 * Aug.17, 2004 David Bronaugh (dbronaugh) 52 * - Added screen brightness setting interface 53 * Thanks to FreeBSD crew (acpi_panasonic.c) 54 * for the ideas I needed to accomplish it 55 * 56 * May.29, 2006 Hiroshi Miura <miura@da-cha.org> 57 * -v0.8.4 follow to change keyinput structure 58 * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>, 59 * Jacob Bower <jacob.bower@ic.ac.uk> and 60 * Hiroshi Yokota for providing solutions. 61 * 62 * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org> 63 * -v0.8.2 merge code of YOKOTA Hiroshi 64 * <yokota@netlab.is.tsukuba.ac.jp>. 65 * Add sticky key mode interface. 66 * Refactoring acpi_pcc_generate_keyinput(). 67 * 68 * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org> 69 * -v0.8 Generate key input event on input subsystem. 70 * This is based on yet another driver written by 71 * Ryuta Nakanishi. 72 * 73 * Sep.10, 2004 Hiroshi Miura <miura@da-cha.org> 74 * -v0.7 Change proc interface functions using seq_file 75 * facility as same as other ACPI drivers. 76 * 77 * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org> 78 * -v0.6.4 Fix a silly error with status checking 79 * 80 * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org> 81 * -v0.6.3 replace read_acpi_int by standard function 82 * acpi_evaluate_integer 83 * some clean up and make smart copyright notice. 84 * fix return value of pcc_acpi_get_key() 85 * fix checking return value of acpi_bus_register_driver() 86 * 87 * Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org> 88 * -v0.6.2 Add check on ACPI data (num_sifr) 89 * Coding style cleanups, better error messages/handling 90 * Fixed an off-by-one error in memory allocation 91 * 92 * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org> 93 * -v0.6.1 Fix a silly error with status checking 94 * 95 * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org> 96 * - v0.6 Correct brightness controls to reflect reality 97 * based on information gleaned by Hiroshi Miura 98 * and discussions with Hiroshi Miura 99 * 100 * Aug.10, 2004 Hiroshi Miura <miura@da-cha.org> 101 * - v0.5 support LCD brightness control 102 * based on the disclosed information by MEI. 103 * 104 * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org> 105 * - v0.4 first post version 106 * add function to retrive SIFR 107 * 108 * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org> 109 * - v0.3 get proper status of hotkey 110 * 111 * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org> 112 * - v0.2 add HotKey handler 113 * 114 * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org> 115 * - v0.1 start from toshiba_acpi driver written by John Belmonte 116 * 117 */ 118 119 #include <linux/kernel.h> 120 #include <linux/module.h> 121 #include <linux/init.h> 122 #include <linux/types.h> 123 #include <linux/backlight.h> 124 #include <linux/ctype.h> 125 #include <linux/seq_file.h> 126 #include <linux/uaccess.h> 127 #include <acpi/acpi_bus.h> 128 #include <acpi/acpi_drivers.h> 129 #include <linux/input.h> 130 131 132 #ifndef ACPI_HOTKEY_COMPONENT 133 #define ACPI_HOTKEY_COMPONENT 0x10000000 134 #endif 135 136 #define _COMPONENT ACPI_HOTKEY_COMPONENT 137 138 MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte"); 139 MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops"); 140 MODULE_LICENSE("GPL"); 141 142 #define LOGPREFIX "pcc_acpi: " 143 144 /* Define ACPI PATHs */ 145 /* Lets note hotkeys */ 146 #define METHOD_HKEY_QUERY "HINF" 147 #define METHOD_HKEY_SQTY "SQTY" 148 #define METHOD_HKEY_SINF "SINF" 149 #define METHOD_HKEY_SSET "SSET" 150 #define HKEY_NOTIFY 0x80 151 152 #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support" 153 #define ACPI_PCC_DEVICE_NAME "Hotkey" 154 #define ACPI_PCC_CLASS "pcc" 155 156 #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0" 157 158 /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent 159 ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00 160 */ 161 enum SINF_BITS { SINF_NUM_BATTERIES = 0, 162 SINF_LCD_TYPE, 163 SINF_AC_MAX_BRIGHT, 164 SINF_AC_MIN_BRIGHT, 165 SINF_AC_CUR_BRIGHT, 166 SINF_DC_MAX_BRIGHT, 167 SINF_DC_MIN_BRIGHT, 168 SINF_DC_CUR_BRIGHT, 169 SINF_MUTE, 170 SINF_RESERVED, 171 SINF_ENV_STATE, 172 SINF_STICKY_KEY = 0x80, 173 }; 174 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */ 175 176 static int acpi_pcc_hotkey_add(struct acpi_device *device); 177 static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type); 178 static int acpi_pcc_hotkey_resume(struct acpi_device *device); 179 180 static const struct acpi_device_id pcc_device_ids[] = { 181 { "MAT0012", 0}, 182 { "MAT0013", 0}, 183 { "MAT0018", 0}, 184 { "MAT0019", 0}, 185 { "", 0}, 186 }; 187 188 static struct acpi_driver acpi_pcc_driver = { 189 .name = ACPI_PCC_DRIVER_NAME, 190 .class = ACPI_PCC_CLASS, 191 .ids = pcc_device_ids, 192 .ops = { 193 .add = acpi_pcc_hotkey_add, 194 .remove = acpi_pcc_hotkey_remove, 195 .resume = acpi_pcc_hotkey_resume, 196 }, 197 }; 198 199 #define KEYMAP_SIZE 11 200 static const int initial_keymap[KEYMAP_SIZE] = { 201 /* 0 */ KEY_RESERVED, 202 /* 1 */ KEY_BRIGHTNESSDOWN, 203 /* 2 */ KEY_BRIGHTNESSUP, 204 /* 3 */ KEY_DISPLAYTOGGLE, 205 /* 4 */ KEY_MUTE, 206 /* 5 */ KEY_VOLUMEDOWN, 207 /* 6 */ KEY_VOLUMEUP, 208 /* 7 */ KEY_SLEEP, 209 /* 8 */ KEY_PROG1, /* Change CPU boost */ 210 /* 9 */ KEY_BATTERY, 211 /* 10 */ KEY_SUSPEND, 212 }; 213 214 struct pcc_acpi { 215 acpi_handle handle; 216 unsigned long num_sifr; 217 int sticky_mode; 218 u32 *sinf; 219 struct acpi_device *device; 220 struct input_dev *input_dev; 221 struct backlight_device *backlight; 222 int keymap[KEYMAP_SIZE]; 223 }; 224 225 struct pcc_keyinput { 226 struct acpi_hotkey *hotkey; 227 }; 228 229 /* method access functions */ 230 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val) 231 { 232 union acpi_object in_objs[] = { 233 { .integer.type = ACPI_TYPE_INTEGER, 234 .integer.value = func, }, 235 { .integer.type = ACPI_TYPE_INTEGER, 236 .integer.value = val, }, 237 }; 238 struct acpi_object_list params = { 239 .count = ARRAY_SIZE(in_objs), 240 .pointer = in_objs, 241 }; 242 acpi_status status = AE_OK; 243 244 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET, 245 ¶ms, NULL); 246 247 return status == AE_OK; 248 } 249 250 static inline int acpi_pcc_get_sqty(struct acpi_device *device) 251 { 252 unsigned long long s; 253 acpi_status status; 254 255 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, 256 NULL, &s); 257 if (ACPI_SUCCESS(status)) 258 return s; 259 else { 260 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 261 "evaluation error HKEY.SQTY\n")); 262 return -EINVAL; 263 } 264 } 265 266 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc, u32 *sinf) 267 { 268 acpi_status status; 269 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; 270 union acpi_object *hkey = NULL; 271 int i; 272 273 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, 0, 274 &buffer); 275 if (ACPI_FAILURE(status)) { 276 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 277 "evaluation error HKEY.SINF\n")); 278 return 0; 279 } 280 281 hkey = buffer.pointer; 282 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) { 283 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n")); 284 goto end; 285 } 286 287 if (pcc->num_sifr < hkey->package.count) { 288 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 289 "SQTY reports bad SINF length\n")); 290 status = AE_ERROR; 291 goto end; 292 } 293 294 for (i = 0; i < hkey->package.count; i++) { 295 union acpi_object *element = &(hkey->package.elements[i]); 296 if (likely(element->type == ACPI_TYPE_INTEGER)) { 297 sinf[i] = element->integer.value; 298 } else 299 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 300 "Invalid HKEY.SINF data\n")); 301 } 302 sinf[hkey->package.count] = -1; 303 304 end: 305 kfree(buffer.pointer); 306 return status == AE_OK; 307 } 308 309 /* backlight API interface functions */ 310 311 /* This driver currently treats AC and DC brightness identical, 312 * since we don't need to invent an interface to the core ACPI 313 * logic to receive events in case a power supply is plugged in 314 * or removed */ 315 316 static int bl_get(struct backlight_device *bd) 317 { 318 struct pcc_acpi *pcc = bl_get_data(bd); 319 320 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 321 return -EIO; 322 323 return pcc->sinf[SINF_AC_CUR_BRIGHT]; 324 } 325 326 static int bl_set_status(struct backlight_device *bd) 327 { 328 struct pcc_acpi *pcc = bl_get_data(bd); 329 int bright = bd->props.brightness; 330 int rc; 331 332 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 333 return -EIO; 334 335 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT]) 336 bright = pcc->sinf[SINF_AC_MIN_BRIGHT]; 337 338 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT]) 339 bright = pcc->sinf[SINF_DC_MIN_BRIGHT]; 340 341 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] || 342 bright > pcc->sinf[SINF_AC_MAX_BRIGHT]) 343 return -EINVAL; 344 345 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright); 346 if (rc < 0) 347 return rc; 348 349 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright); 350 } 351 352 static struct backlight_ops pcc_backlight_ops = { 353 .get_brightness = bl_get, 354 .update_status = bl_set_status, 355 }; 356 357 358 /* sysfs user interface functions */ 359 360 static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr, 361 char *buf) 362 { 363 struct acpi_device *acpi = to_acpi_device(dev); 364 struct pcc_acpi *pcc = acpi_driver_data(acpi); 365 366 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 367 return -EIO; 368 369 return sprintf(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]); 370 } 371 372 static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr, 373 char *buf) 374 { 375 struct acpi_device *acpi = to_acpi_device(dev); 376 struct pcc_acpi *pcc = acpi_driver_data(acpi); 377 378 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 379 return -EIO; 380 381 return sprintf(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]); 382 } 383 384 static ssize_t show_mute(struct device *dev, struct device_attribute *attr, 385 char *buf) 386 { 387 struct acpi_device *acpi = to_acpi_device(dev); 388 struct pcc_acpi *pcc = acpi_driver_data(acpi); 389 390 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 391 return -EIO; 392 393 return sprintf(buf, "%u\n", pcc->sinf[SINF_MUTE]); 394 } 395 396 static ssize_t show_sticky(struct device *dev, struct device_attribute *attr, 397 char *buf) 398 { 399 struct acpi_device *acpi = to_acpi_device(dev); 400 struct pcc_acpi *pcc = acpi_driver_data(acpi); 401 402 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 403 return -EIO; 404 405 return sprintf(buf, "%u\n", pcc->sinf[SINF_STICKY_KEY]); 406 } 407 408 static ssize_t set_sticky(struct device *dev, struct device_attribute *attr, 409 const char *buf, size_t count) 410 { 411 struct acpi_device *acpi = to_acpi_device(dev); 412 struct pcc_acpi *pcc = acpi_driver_data(acpi); 413 int val; 414 415 if (count && sscanf(buf, "%i", &val) == 1 && 416 (val == 0 || val == 1)) { 417 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val); 418 pcc->sticky_mode = val; 419 } 420 421 return count; 422 } 423 424 static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL); 425 static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL); 426 static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL); 427 static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky); 428 429 static struct attribute *pcc_sysfs_entries[] = { 430 &dev_attr_numbatt.attr, 431 &dev_attr_lcdtype.attr, 432 &dev_attr_mute.attr, 433 &dev_attr_sticky_key.attr, 434 NULL, 435 }; 436 437 static struct attribute_group pcc_attr_group = { 438 .name = NULL, /* put in device directory */ 439 .attrs = pcc_sysfs_entries, 440 }; 441 442 443 /* hotkey input device driver */ 444 445 static int pcc_getkeycode(struct input_dev *dev, int scancode, int *keycode) 446 { 447 struct pcc_acpi *pcc = input_get_drvdata(dev); 448 449 if (scancode >= ARRAY_SIZE(pcc->keymap)) 450 return -EINVAL; 451 452 *keycode = pcc->keymap[scancode]; 453 454 return 0; 455 } 456 457 static int keymap_get_by_keycode(struct pcc_acpi *pcc, int keycode) 458 { 459 int i; 460 461 for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) { 462 if (pcc->keymap[i] == keycode) 463 return i+1; 464 } 465 466 return 0; 467 } 468 469 static int pcc_setkeycode(struct input_dev *dev, int scancode, int keycode) 470 { 471 struct pcc_acpi *pcc = input_get_drvdata(dev); 472 int oldkeycode; 473 474 if (scancode >= ARRAY_SIZE(pcc->keymap)) 475 return -EINVAL; 476 477 if (keycode < 0 || keycode > KEY_MAX) 478 return -EINVAL; 479 480 oldkeycode = pcc->keymap[scancode]; 481 pcc->keymap[scancode] = keycode; 482 483 set_bit(keycode, dev->keybit); 484 485 if (!keymap_get_by_keycode(pcc, oldkeycode)) 486 clear_bit(oldkeycode, dev->keybit); 487 488 return 0; 489 } 490 491 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc) 492 { 493 struct input_dev *hotk_input_dev = pcc->input_dev; 494 int rc; 495 int key_code, hkey_num; 496 unsigned long long result; 497 498 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY, 499 NULL, &result); 500 if (!ACPI_SUCCESS(rc)) { 501 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 502 "error getting hotkey status\n")); 503 return; 504 } 505 506 acpi_bus_generate_proc_event(pcc->device, HKEY_NOTIFY, result); 507 508 hkey_num = result & 0xf; 509 510 if (hkey_num < 0 || hkey_num >= ARRAY_SIZE(pcc->keymap)) { 511 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 512 "hotkey number out of range: %d\n", 513 hkey_num)); 514 return; 515 } 516 517 key_code = pcc->keymap[hkey_num]; 518 519 if (key_code != KEY_RESERVED) { 520 int pushed = (result & 0x80) ? TRUE : FALSE; 521 522 input_report_key(hotk_input_dev, key_code, pushed); 523 input_sync(hotk_input_dev); 524 } 525 526 return; 527 } 528 529 static void acpi_pcc_hotkey_notify(acpi_handle handle, u32 event, void *data) 530 { 531 struct pcc_acpi *pcc = (struct pcc_acpi *) data; 532 533 switch (event) { 534 case HKEY_NOTIFY: 535 acpi_pcc_generate_keyinput(pcc); 536 break; 537 default: 538 /* nothing to do */ 539 break; 540 } 541 } 542 543 static int acpi_pcc_init_input(struct pcc_acpi *pcc) 544 { 545 int i, rc; 546 547 pcc->input_dev = input_allocate_device(); 548 if (!pcc->input_dev) { 549 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 550 "Couldn't allocate input device for hotkey")); 551 return -ENOMEM; 552 } 553 554 pcc->input_dev->evbit[0] = BIT(EV_KEY); 555 556 pcc->input_dev->name = ACPI_PCC_DRIVER_NAME; 557 pcc->input_dev->phys = ACPI_PCC_INPUT_PHYS; 558 pcc->input_dev->id.bustype = BUS_HOST; 559 pcc->input_dev->id.vendor = 0x0001; 560 pcc->input_dev->id.product = 0x0001; 561 pcc->input_dev->id.version = 0x0100; 562 pcc->input_dev->getkeycode = pcc_getkeycode; 563 pcc->input_dev->setkeycode = pcc_setkeycode; 564 565 /* load initial keymap */ 566 memcpy(pcc->keymap, initial_keymap, sizeof(pcc->keymap)); 567 568 for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) 569 __set_bit(pcc->keymap[i], pcc->input_dev->keybit); 570 __clear_bit(KEY_RESERVED, pcc->input_dev->keybit); 571 572 input_set_drvdata(pcc->input_dev, pcc); 573 574 rc = input_register_device(pcc->input_dev); 575 if (rc < 0) 576 input_free_device(pcc->input_dev); 577 578 return rc; 579 } 580 581 /* kernel module interface */ 582 583 static int acpi_pcc_hotkey_resume(struct acpi_device *device) 584 { 585 struct pcc_acpi *pcc = acpi_driver_data(device); 586 acpi_status status = AE_OK; 587 588 if (device == NULL || pcc == NULL) 589 return -EINVAL; 590 591 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n", 592 pcc->sticky_mode)); 593 594 status = acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode); 595 596 return status == AE_OK ? 0 : -EINVAL; 597 } 598 599 static int acpi_pcc_hotkey_add(struct acpi_device *device) 600 { 601 acpi_status status; 602 struct pcc_acpi *pcc; 603 int num_sifr, result; 604 605 if (!device) 606 return -EINVAL; 607 608 num_sifr = acpi_pcc_get_sqty(device); 609 610 if (num_sifr > 255) { 611 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large")); 612 return -ENODEV; 613 } 614 615 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); 616 if (!pcc) { 617 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 618 "Couldn't allocate mem for pcc")); 619 return -ENOMEM; 620 } 621 622 pcc->sinf = kzalloc(sizeof(u32) * (num_sifr + 1), GFP_KERNEL); 623 if (!pcc->sinf) { 624 result = -ENOMEM; 625 goto out_hotkey; 626 } 627 628 pcc->device = device; 629 pcc->handle = device->handle; 630 pcc->num_sifr = num_sifr; 631 device->driver_data = pcc; 632 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME); 633 strcpy(acpi_device_class(device), ACPI_PCC_CLASS); 634 635 result = acpi_pcc_init_input(pcc); 636 if (result) { 637 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 638 "Error installing keyinput handler\n")); 639 goto out_sinf; 640 } 641 642 /* initialize hotkey input device */ 643 status = acpi_install_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY, 644 acpi_pcc_hotkey_notify, pcc); 645 646 if (ACPI_FAILURE(status)) { 647 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 648 "Error installing notify handler\n")); 649 result = -ENODEV; 650 goto out_input; 651 } 652 653 /* initialize backlight */ 654 pcc->backlight = backlight_device_register("panasonic", NULL, pcc, 655 &pcc_backlight_ops); 656 if (IS_ERR(pcc->backlight)) 657 goto out_notify; 658 659 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) { 660 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 661 "Couldn't retrieve BIOS data\n")); 662 goto out_backlight; 663 } 664 665 /* read the initial brightness setting from the hardware */ 666 pcc->backlight->props.max_brightness = 667 pcc->sinf[SINF_AC_MAX_BRIGHT]; 668 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; 669 670 /* read the initial sticky key mode from the hardware */ 671 pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY]; 672 673 /* add sysfs attributes */ 674 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group); 675 if (result) 676 goto out_backlight; 677 678 return 0; 679 680 out_backlight: 681 backlight_device_unregister(pcc->backlight); 682 out_notify: 683 acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY, 684 acpi_pcc_hotkey_notify); 685 out_input: 686 input_unregister_device(pcc->input_dev); 687 /* no need to input_free_device() since core input API refcount and 688 * free()s the device */ 689 out_sinf: 690 kfree(pcc->sinf); 691 out_hotkey: 692 kfree(pcc); 693 694 return result; 695 } 696 697 static int __init acpi_pcc_init(void) 698 { 699 int result = 0; 700 701 if (acpi_disabled) 702 return -ENODEV; 703 704 result = acpi_bus_register_driver(&acpi_pcc_driver); 705 if (result < 0) { 706 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 707 "Error registering hotkey driver\n")); 708 return -ENODEV; 709 } 710 711 return 0; 712 } 713 714 static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type) 715 { 716 struct pcc_acpi *pcc = acpi_driver_data(device); 717 718 if (!device || !pcc) 719 return -EINVAL; 720 721 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group); 722 723 backlight_device_unregister(pcc->backlight); 724 725 acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY, 726 acpi_pcc_hotkey_notify); 727 728 input_unregister_device(pcc->input_dev); 729 /* no need to input_free_device() since core input API refcount and 730 * free()s the device */ 731 732 kfree(pcc->sinf); 733 kfree(pcc); 734 735 return 0; 736 } 737 738 static void __exit acpi_pcc_exit(void) 739 { 740 acpi_bus_unregister_driver(&acpi_pcc_driver); 741 } 742 743 module_init(acpi_pcc_init); 744 module_exit(acpi_pcc_exit); 745