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 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event); 180 181 static const struct acpi_device_id pcc_device_ids[] = { 182 { "MAT0012", 0}, 183 { "MAT0013", 0}, 184 { "MAT0018", 0}, 185 { "MAT0019", 0}, 186 { "", 0}, 187 }; 188 MODULE_DEVICE_TABLE(acpi, pcc_device_ids); 189 190 static struct acpi_driver acpi_pcc_driver = { 191 .name = ACPI_PCC_DRIVER_NAME, 192 .class = ACPI_PCC_CLASS, 193 .ids = pcc_device_ids, 194 .ops = { 195 .add = acpi_pcc_hotkey_add, 196 .remove = acpi_pcc_hotkey_remove, 197 .resume = acpi_pcc_hotkey_resume, 198 .notify = acpi_pcc_hotkey_notify, 199 }, 200 }; 201 202 #define KEYMAP_SIZE 11 203 static const int initial_keymap[KEYMAP_SIZE] = { 204 /* 0 */ KEY_RESERVED, 205 /* 1 */ KEY_BRIGHTNESSDOWN, 206 /* 2 */ KEY_BRIGHTNESSUP, 207 /* 3 */ KEY_DISPLAYTOGGLE, 208 /* 4 */ KEY_MUTE, 209 /* 5 */ KEY_VOLUMEDOWN, 210 /* 6 */ KEY_VOLUMEUP, 211 /* 7 */ KEY_SLEEP, 212 /* 8 */ KEY_PROG1, /* Change CPU boost */ 213 /* 9 */ KEY_BATTERY, 214 /* 10 */ KEY_SUSPEND, 215 }; 216 217 struct pcc_acpi { 218 acpi_handle handle; 219 unsigned long num_sifr; 220 int sticky_mode; 221 u32 *sinf; 222 struct acpi_device *device; 223 struct input_dev *input_dev; 224 struct backlight_device *backlight; 225 int keymap[KEYMAP_SIZE]; 226 }; 227 228 struct pcc_keyinput { 229 struct acpi_hotkey *hotkey; 230 }; 231 232 /* method access functions */ 233 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val) 234 { 235 union acpi_object in_objs[] = { 236 { .integer.type = ACPI_TYPE_INTEGER, 237 .integer.value = func, }, 238 { .integer.type = ACPI_TYPE_INTEGER, 239 .integer.value = val, }, 240 }; 241 struct acpi_object_list params = { 242 .count = ARRAY_SIZE(in_objs), 243 .pointer = in_objs, 244 }; 245 acpi_status status = AE_OK; 246 247 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET, 248 ¶ms, NULL); 249 250 return status == AE_OK; 251 } 252 253 static inline int acpi_pcc_get_sqty(struct acpi_device *device) 254 { 255 unsigned long long s; 256 acpi_status status; 257 258 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, 259 NULL, &s); 260 if (ACPI_SUCCESS(status)) 261 return s; 262 else { 263 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 264 "evaluation error HKEY.SQTY\n")); 265 return -EINVAL; 266 } 267 } 268 269 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc, u32 *sinf) 270 { 271 acpi_status status; 272 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; 273 union acpi_object *hkey = NULL; 274 int i; 275 276 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL, 277 &buffer); 278 if (ACPI_FAILURE(status)) { 279 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 280 "evaluation error HKEY.SINF\n")); 281 return 0; 282 } 283 284 hkey = buffer.pointer; 285 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) { 286 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n")); 287 goto end; 288 } 289 290 if (pcc->num_sifr < hkey->package.count) { 291 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 292 "SQTY reports bad SINF length\n")); 293 status = AE_ERROR; 294 goto end; 295 } 296 297 for (i = 0; i < hkey->package.count; i++) { 298 union acpi_object *element = &(hkey->package.elements[i]); 299 if (likely(element->type == ACPI_TYPE_INTEGER)) { 300 sinf[i] = element->integer.value; 301 } else 302 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 303 "Invalid HKEY.SINF data\n")); 304 } 305 sinf[hkey->package.count] = -1; 306 307 end: 308 kfree(buffer.pointer); 309 return status == AE_OK; 310 } 311 312 /* backlight API interface functions */ 313 314 /* This driver currently treats AC and DC brightness identical, 315 * since we don't need to invent an interface to the core ACPI 316 * logic to receive events in case a power supply is plugged in 317 * or removed */ 318 319 static int bl_get(struct backlight_device *bd) 320 { 321 struct pcc_acpi *pcc = bl_get_data(bd); 322 323 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 324 return -EIO; 325 326 return pcc->sinf[SINF_AC_CUR_BRIGHT]; 327 } 328 329 static int bl_set_status(struct backlight_device *bd) 330 { 331 struct pcc_acpi *pcc = bl_get_data(bd); 332 int bright = bd->props.brightness; 333 int rc; 334 335 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 336 return -EIO; 337 338 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT]) 339 bright = pcc->sinf[SINF_AC_MIN_BRIGHT]; 340 341 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT]) 342 bright = pcc->sinf[SINF_DC_MIN_BRIGHT]; 343 344 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] || 345 bright > pcc->sinf[SINF_AC_MAX_BRIGHT]) 346 return -EINVAL; 347 348 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright); 349 if (rc < 0) 350 return rc; 351 352 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright); 353 } 354 355 static struct backlight_ops pcc_backlight_ops = { 356 .get_brightness = bl_get, 357 .update_status = bl_set_status, 358 }; 359 360 361 /* sysfs user interface functions */ 362 363 static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr, 364 char *buf) 365 { 366 struct acpi_device *acpi = to_acpi_device(dev); 367 struct pcc_acpi *pcc = acpi_driver_data(acpi); 368 369 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 370 return -EIO; 371 372 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]); 373 } 374 375 static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr, 376 char *buf) 377 { 378 struct acpi_device *acpi = to_acpi_device(dev); 379 struct pcc_acpi *pcc = acpi_driver_data(acpi); 380 381 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 382 return -EIO; 383 384 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]); 385 } 386 387 static ssize_t show_mute(struct device *dev, struct device_attribute *attr, 388 char *buf) 389 { 390 struct acpi_device *acpi = to_acpi_device(dev); 391 struct pcc_acpi *pcc = acpi_driver_data(acpi); 392 393 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 394 return -EIO; 395 396 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]); 397 } 398 399 static ssize_t show_sticky(struct device *dev, struct device_attribute *attr, 400 char *buf) 401 { 402 struct acpi_device *acpi = to_acpi_device(dev); 403 struct pcc_acpi *pcc = acpi_driver_data(acpi); 404 405 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) 406 return -EIO; 407 408 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_STICKY_KEY]); 409 } 410 411 static ssize_t set_sticky(struct device *dev, struct device_attribute *attr, 412 const char *buf, size_t count) 413 { 414 struct acpi_device *acpi = to_acpi_device(dev); 415 struct pcc_acpi *pcc = acpi_driver_data(acpi); 416 int val; 417 418 if (count && sscanf(buf, "%i", &val) == 1 && 419 (val == 0 || val == 1)) { 420 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val); 421 pcc->sticky_mode = val; 422 } 423 424 return count; 425 } 426 427 static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL); 428 static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL); 429 static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL); 430 static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky); 431 432 static struct attribute *pcc_sysfs_entries[] = { 433 &dev_attr_numbatt.attr, 434 &dev_attr_lcdtype.attr, 435 &dev_attr_mute.attr, 436 &dev_attr_sticky_key.attr, 437 NULL, 438 }; 439 440 static struct attribute_group pcc_attr_group = { 441 .name = NULL, /* put in device directory */ 442 .attrs = pcc_sysfs_entries, 443 }; 444 445 446 /* hotkey input device driver */ 447 448 static int pcc_getkeycode(struct input_dev *dev, int scancode, int *keycode) 449 { 450 struct pcc_acpi *pcc = input_get_drvdata(dev); 451 452 if (scancode >= ARRAY_SIZE(pcc->keymap)) 453 return -EINVAL; 454 455 *keycode = pcc->keymap[scancode]; 456 457 return 0; 458 } 459 460 static int keymap_get_by_keycode(struct pcc_acpi *pcc, int keycode) 461 { 462 int i; 463 464 for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) { 465 if (pcc->keymap[i] == keycode) 466 return i+1; 467 } 468 469 return 0; 470 } 471 472 static int pcc_setkeycode(struct input_dev *dev, int scancode, int keycode) 473 { 474 struct pcc_acpi *pcc = input_get_drvdata(dev); 475 int oldkeycode; 476 477 if (scancode >= ARRAY_SIZE(pcc->keymap)) 478 return -EINVAL; 479 480 if (keycode < 0 || keycode > KEY_MAX) 481 return -EINVAL; 482 483 oldkeycode = pcc->keymap[scancode]; 484 pcc->keymap[scancode] = keycode; 485 486 set_bit(keycode, dev->keybit); 487 488 if (!keymap_get_by_keycode(pcc, oldkeycode)) 489 clear_bit(oldkeycode, dev->keybit); 490 491 return 0; 492 } 493 494 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc) 495 { 496 struct input_dev *hotk_input_dev = pcc->input_dev; 497 int rc; 498 int key_code, hkey_num; 499 unsigned long long result; 500 501 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY, 502 NULL, &result); 503 if (!ACPI_SUCCESS(rc)) { 504 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 505 "error getting hotkey status\n")); 506 return; 507 } 508 509 acpi_bus_generate_proc_event(pcc->device, HKEY_NOTIFY, result); 510 511 hkey_num = result & 0xf; 512 513 if (hkey_num < 0 || hkey_num >= ARRAY_SIZE(pcc->keymap)) { 514 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 515 "hotkey number out of range: %d\n", 516 hkey_num)); 517 return; 518 } 519 520 key_code = pcc->keymap[hkey_num]; 521 522 if (key_code != KEY_RESERVED) { 523 int pushed = (result & 0x80) ? TRUE : FALSE; 524 525 input_report_key(hotk_input_dev, key_code, pushed); 526 input_sync(hotk_input_dev); 527 } 528 529 return; 530 } 531 532 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event) 533 { 534 struct pcc_acpi *pcc = acpi_driver_data(device); 535 536 switch (event) { 537 case HKEY_NOTIFY: 538 acpi_pcc_generate_keyinput(pcc); 539 break; 540 default: 541 /* nothing to do */ 542 break; 543 } 544 } 545 546 static int acpi_pcc_init_input(struct pcc_acpi *pcc) 547 { 548 int i, rc; 549 550 pcc->input_dev = input_allocate_device(); 551 if (!pcc->input_dev) { 552 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 553 "Couldn't allocate input device for hotkey")); 554 return -ENOMEM; 555 } 556 557 pcc->input_dev->evbit[0] = BIT(EV_KEY); 558 559 pcc->input_dev->name = ACPI_PCC_DRIVER_NAME; 560 pcc->input_dev->phys = ACPI_PCC_INPUT_PHYS; 561 pcc->input_dev->id.bustype = BUS_HOST; 562 pcc->input_dev->id.vendor = 0x0001; 563 pcc->input_dev->id.product = 0x0001; 564 pcc->input_dev->id.version = 0x0100; 565 pcc->input_dev->getkeycode = pcc_getkeycode; 566 pcc->input_dev->setkeycode = pcc_setkeycode; 567 568 /* load initial keymap */ 569 memcpy(pcc->keymap, initial_keymap, sizeof(pcc->keymap)); 570 571 for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) 572 __set_bit(pcc->keymap[i], pcc->input_dev->keybit); 573 __clear_bit(KEY_RESERVED, pcc->input_dev->keybit); 574 575 input_set_drvdata(pcc->input_dev, pcc); 576 577 rc = input_register_device(pcc->input_dev); 578 if (rc < 0) 579 input_free_device(pcc->input_dev); 580 581 return rc; 582 } 583 584 /* kernel module interface */ 585 586 static int acpi_pcc_hotkey_resume(struct acpi_device *device) 587 { 588 struct pcc_acpi *pcc = acpi_driver_data(device); 589 acpi_status status = AE_OK; 590 591 if (device == NULL || pcc == NULL) 592 return -EINVAL; 593 594 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n", 595 pcc->sticky_mode)); 596 597 status = acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode); 598 599 return status == AE_OK ? 0 : -EINVAL; 600 } 601 602 static int acpi_pcc_hotkey_add(struct acpi_device *device) 603 { 604 struct pcc_acpi *pcc; 605 int num_sifr, result; 606 607 if (!device) 608 return -EINVAL; 609 610 num_sifr = acpi_pcc_get_sqty(device); 611 612 if (num_sifr > 255) { 613 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large")); 614 return -ENODEV; 615 } 616 617 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); 618 if (!pcc) { 619 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 620 "Couldn't allocate mem for pcc")); 621 return -ENOMEM; 622 } 623 624 pcc->sinf = kzalloc(sizeof(u32) * (num_sifr + 1), GFP_KERNEL); 625 if (!pcc->sinf) { 626 result = -ENOMEM; 627 goto out_hotkey; 628 } 629 630 pcc->device = device; 631 pcc->handle = device->handle; 632 pcc->num_sifr = num_sifr; 633 device->driver_data = pcc; 634 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME); 635 strcpy(acpi_device_class(device), ACPI_PCC_CLASS); 636 637 result = acpi_pcc_init_input(pcc); 638 if (result) { 639 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 640 "Error installing keyinput handler\n")); 641 goto out_sinf; 642 } 643 644 /* initialize backlight */ 645 pcc->backlight = backlight_device_register("panasonic", NULL, pcc, 646 &pcc_backlight_ops); 647 if (IS_ERR(pcc->backlight)) 648 goto out_input; 649 650 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) { 651 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 652 "Couldn't retrieve BIOS data\n")); 653 goto out_backlight; 654 } 655 656 /* read the initial brightness setting from the hardware */ 657 pcc->backlight->props.max_brightness = 658 pcc->sinf[SINF_AC_MAX_BRIGHT]; 659 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; 660 661 /* read the initial sticky key mode from the hardware */ 662 pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY]; 663 664 /* add sysfs attributes */ 665 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group); 666 if (result) 667 goto out_backlight; 668 669 return 0; 670 671 out_backlight: 672 backlight_device_unregister(pcc->backlight); 673 out_input: 674 input_unregister_device(pcc->input_dev); 675 /* no need to input_free_device() since core input API refcount and 676 * free()s the device */ 677 out_sinf: 678 kfree(pcc->sinf); 679 out_hotkey: 680 kfree(pcc); 681 682 return result; 683 } 684 685 static int __init acpi_pcc_init(void) 686 { 687 int result = 0; 688 689 if (acpi_disabled) 690 return -ENODEV; 691 692 result = acpi_bus_register_driver(&acpi_pcc_driver); 693 if (result < 0) { 694 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 695 "Error registering hotkey driver\n")); 696 return -ENODEV; 697 } 698 699 return 0; 700 } 701 702 static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type) 703 { 704 struct pcc_acpi *pcc = acpi_driver_data(device); 705 706 if (!device || !pcc) 707 return -EINVAL; 708 709 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group); 710 711 backlight_device_unregister(pcc->backlight); 712 713 input_unregister_device(pcc->input_dev); 714 /* no need to input_free_device() since core input API refcount and 715 * free()s the device */ 716 717 kfree(pcc->sinf); 718 kfree(pcc); 719 720 return 0; 721 } 722 723 static void __exit acpi_pcc_exit(void) 724 { 725 acpi_bus_unregister_driver(&acpi_pcc_driver); 726 } 727 728 module_init(acpi_pcc_init); 729 module_exit(acpi_pcc_exit); 730