1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Panasonic HotKey and LCD brightness control driver 4 * (C) 2004 Hiroshi Miura <miura@da-cha.org> 5 * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/ 6 * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp> 7 * (C) 2004 David Bronaugh <dbronaugh> 8 * (C) 2006-2008 Harald Welte <laforge@gnumonks.org> 9 * 10 * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte 11 * 12 *--------------------------------------------------------------------------- 13 * 14 * ChangeLog: 15 * Aug.18, 2020 Kenneth Chan <kenneth.t.chan@gmail.com> 16 * -v0.98 add platform devices for firmware brightness registers 17 * add support for battery charging threshold (eco mode) 18 * resolve hotkey double trigger 19 * add write support to mute 20 * fix sticky_key init bug 21 * fix naming of platform files for consistency with other 22 * modules 23 * split MODULE_AUTHOR() by one author per macro call 24 * replace ACPI prints with pr_*() macros 25 * -v0.97 add support for cdpower hardware switch 26 * -v0.96 merge Lucina's enhancement 27 * Jan.13, 2009 Martin Lucina <mato@kotelna.sk> 28 * - add support for optical driver power in 29 * Y and W series 30 * 31 * Sep.23, 2008 Harald Welte <laforge@gnumonks.org> 32 * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to 33 * drivers/misc/panasonic-laptop.c 34 * 35 * Jul.04, 2008 Harald Welte <laforge@gnumonks.org> 36 * -v0.94 replace /proc interface with device attributes 37 * support {set,get}keycode on th input device 38 * 39 * Jun.27, 2008 Harald Welte <laforge@gnumonks.org> 40 * -v0.92 merge with 2.6.26-rc6 input API changes 41 * remove broken <= 2.6.15 kernel support 42 * resolve all compiler warnings 43 * various coding style fixes (checkpatch.pl) 44 * add support for backlight api 45 * major code restructuring 46 * 47 * Dac.28, 2007 Harald Welte <laforge@gnumonks.org> 48 * -v0.91 merge with 2.6.24-rc6 ACPI changes 49 * 50 * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org> 51 * -v0.9 remove warning about section reference. 52 * remove acpi_os_free 53 * add /proc/acpi/pcc/brightness interface for HAL access 54 * merge dbronaugh's enhancement 55 * Aug.17, 2004 David Bronaugh (dbronaugh) 56 * - Added screen brightness setting interface 57 * Thanks to FreeBSD crew (acpi_panasonic.c) 58 * for the ideas I needed to accomplish it 59 * 60 * May.29, 2006 Hiroshi Miura <miura@da-cha.org> 61 * -v0.8.4 follow to change keyinput structure 62 * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>, 63 * Jacob Bower <jacob.bower@ic.ac.uk> and 64 * Hiroshi Yokota for providing solutions. 65 * 66 * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org> 67 * -v0.8.2 merge code of YOKOTA Hiroshi 68 * <yokota@netlab.is.tsukuba.ac.jp>. 69 * Add sticky key mode interface. 70 * Refactoring acpi_pcc_generate_keyinput(). 71 * 72 * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org> 73 * -v0.8 Generate key input event on input subsystem. 74 * This is based on yet another driver written by 75 * Ryuta Nakanishi. 76 * 77 * Sep.10, 2004 Hiroshi Miura <miura@da-cha.org> 78 * -v0.7 Change proc interface functions using seq_file 79 * facility as same as other ACPI drivers. 80 * 81 * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org> 82 * -v0.6.4 Fix a silly error with status checking 83 * 84 * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org> 85 * -v0.6.3 replace read_acpi_int by standard function 86 * acpi_evaluate_integer 87 * some clean up and make smart copyright notice. 88 * fix return value of pcc_acpi_get_key() 89 * fix checking return value of acpi_bus_register_driver() 90 * 91 * Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org> 92 * -v0.6.2 Add check on ACPI data (num_sifr) 93 * Coding style cleanups, better error messages/handling 94 * Fixed an off-by-one error in memory allocation 95 * 96 * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org> 97 * -v0.6.1 Fix a silly error with status checking 98 * 99 * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org> 100 * - v0.6 Correct brightness controls to reflect reality 101 * based on information gleaned by Hiroshi Miura 102 * and discussions with Hiroshi Miura 103 * 104 * Aug.10, 2004 Hiroshi Miura <miura@da-cha.org> 105 * - v0.5 support LCD brightness control 106 * based on the disclosed information by MEI. 107 * 108 * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org> 109 * - v0.4 first post version 110 * add function to retrive SIFR 111 * 112 * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org> 113 * - v0.3 get proper status of hotkey 114 * 115 * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org> 116 * - v0.2 add HotKey handler 117 * 118 * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org> 119 * - v0.1 start from toshiba_acpi driver written by John Belmonte 120 */ 121 122 #include <linux/kernel.h> 123 #include <linux/module.h> 124 #include <linux/init.h> 125 #include <linux/types.h> 126 #include <linux/backlight.h> 127 #include <linux/ctype.h> 128 #include <linux/seq_file.h> 129 #include <linux/uaccess.h> 130 #include <linux/slab.h> 131 #include <linux/acpi.h> 132 #include <linux/input.h> 133 #include <linux/input/sparse-keymap.h> 134 #include <linux/platform_device.h> 135 136 137 MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>"); 138 MODULE_AUTHOR("David Bronaugh <dbronaugh@linuxboxen.org>"); 139 MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>"); 140 MODULE_AUTHOR("Martin Lucina <mato@kotelna.sk>"); 141 MODULE_AUTHOR("Kenneth Chan <kenneth.t.chan@gmail.com>"); 142 MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops"); 143 MODULE_LICENSE("GPL"); 144 145 #define LOGPREFIX "pcc_acpi: " 146 147 /* Define ACPI PATHs */ 148 /* Lets note hotkeys */ 149 #define METHOD_HKEY_QUERY "HINF" 150 #define METHOD_HKEY_SQTY "SQTY" 151 #define METHOD_HKEY_SINF "SINF" 152 #define METHOD_HKEY_SSET "SSET" 153 #define METHOD_ECWR "\\_SB.ECWR" 154 #define HKEY_NOTIFY 0x80 155 #define ECO_MODE_OFF 0x00 156 #define ECO_MODE_ON 0x80 157 158 #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support" 159 #define ACPI_PCC_DEVICE_NAME "Hotkey" 160 #define ACPI_PCC_CLASS "pcc" 161 162 #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0" 163 164 /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent 165 ECO_MODEs: 0x03 = off, 0x83 = on 166 */ 167 enum SINF_BITS { SINF_NUM_BATTERIES = 0, 168 SINF_LCD_TYPE, 169 SINF_AC_MAX_BRIGHT, 170 SINF_AC_MIN_BRIGHT, 171 SINF_AC_CUR_BRIGHT, 172 SINF_DC_MAX_BRIGHT, 173 SINF_DC_MIN_BRIGHT, 174 SINF_DC_CUR_BRIGHT, 175 SINF_MUTE, 176 SINF_RESERVED, 177 SINF_ECO_MODE = 0x0A, 178 SINF_CUR_BRIGHT = 0x0D, 179 SINF_STICKY_KEY = 0x80, 180 }; 181 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */ 182 183 static int acpi_pcc_hotkey_add(struct acpi_device *device); 184 static int acpi_pcc_hotkey_remove(struct acpi_device *device); 185 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event); 186 187 static const struct acpi_device_id pcc_device_ids[] = { 188 { "MAT0012", 0}, 189 { "MAT0013", 0}, 190 { "MAT0018", 0}, 191 { "MAT0019", 0}, 192 { "", 0}, 193 }; 194 MODULE_DEVICE_TABLE(acpi, pcc_device_ids); 195 196 #ifdef CONFIG_PM_SLEEP 197 static int acpi_pcc_hotkey_resume(struct device *dev); 198 #endif 199 static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume); 200 201 static struct acpi_driver acpi_pcc_driver = { 202 .name = ACPI_PCC_DRIVER_NAME, 203 .class = ACPI_PCC_CLASS, 204 .ids = pcc_device_ids, 205 .ops = { 206 .add = acpi_pcc_hotkey_add, 207 .remove = acpi_pcc_hotkey_remove, 208 .notify = acpi_pcc_hotkey_notify, 209 }, 210 .drv.pm = &acpi_pcc_hotkey_pm, 211 }; 212 213 static const struct key_entry panasonic_keymap[] = { 214 { KE_KEY, 0, { KEY_RESERVED } }, 215 { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } }, 216 { KE_KEY, 2, { KEY_BRIGHTNESSUP } }, 217 { KE_KEY, 3, { KEY_DISPLAYTOGGLE } }, 218 { KE_KEY, 4, { KEY_MUTE } }, 219 { KE_KEY, 5, { KEY_VOLUMEDOWN } }, 220 { KE_KEY, 6, { KEY_VOLUMEUP } }, 221 { KE_KEY, 7, { KEY_SLEEP } }, 222 { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */ 223 { KE_KEY, 9, { KEY_BATTERY } }, 224 { KE_KEY, 10, { KEY_SUSPEND } }, 225 { KE_END, 0 } 226 }; 227 228 struct pcc_acpi { 229 acpi_handle handle; 230 unsigned long num_sifr; 231 int sticky_key; 232 int eco_mode; 233 int mute; 234 int ac_brightness; 235 int dc_brightness; 236 int current_brightness; 237 u32 *sinf; 238 struct acpi_device *device; 239 struct input_dev *input_dev; 240 struct backlight_device *backlight; 241 struct platform_device *platform; 242 }; 243 244 /* method access functions */ 245 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val) 246 { 247 union acpi_object in_objs[] = { 248 { .integer.type = ACPI_TYPE_INTEGER, 249 .integer.value = func, }, 250 { .integer.type = ACPI_TYPE_INTEGER, 251 .integer.value = val, }, 252 }; 253 struct acpi_object_list params = { 254 .count = ARRAY_SIZE(in_objs), 255 .pointer = in_objs, 256 }; 257 acpi_status status = AE_OK; 258 259 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET, 260 ¶ms, NULL); 261 262 return (status == AE_OK) ? 0 : -EIO; 263 } 264 265 static inline int acpi_pcc_get_sqty(struct acpi_device *device) 266 { 267 unsigned long long s; 268 acpi_status status; 269 270 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, 271 NULL, &s); 272 if (ACPI_SUCCESS(status)) 273 return s; 274 else { 275 pr_err("evaluation error HKEY.SQTY\n"); 276 return -EINVAL; 277 } 278 } 279 280 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc) 281 { 282 acpi_status status; 283 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; 284 union acpi_object *hkey = NULL; 285 int i; 286 287 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL, 288 &buffer); 289 if (ACPI_FAILURE(status)) { 290 pr_err("evaluation error HKEY.SINF\n"); 291 return 0; 292 } 293 294 hkey = buffer.pointer; 295 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) { 296 pr_err("Invalid HKEY.SINF\n"); 297 status = AE_ERROR; 298 goto end; 299 } 300 301 if (pcc->num_sifr < hkey->package.count) { 302 pr_err("SQTY reports bad SINF length\n"); 303 status = AE_ERROR; 304 goto end; 305 } 306 307 for (i = 0; i < hkey->package.count; i++) { 308 union acpi_object *element = &(hkey->package.elements[i]); 309 if (likely(element->type == ACPI_TYPE_INTEGER)) { 310 pcc->sinf[i] = element->integer.value; 311 } else 312 pr_err("Invalid HKEY.SINF data\n"); 313 } 314 pcc->sinf[hkey->package.count] = -1; 315 316 end: 317 kfree(buffer.pointer); 318 return status == AE_OK; 319 } 320 321 /* backlight API interface functions */ 322 323 /* This driver currently treats AC and DC brightness identical, 324 * since we don't need to invent an interface to the core ACPI 325 * logic to receive events in case a power supply is plugged in 326 * or removed */ 327 328 static int bl_get(struct backlight_device *bd) 329 { 330 struct pcc_acpi *pcc = bl_get_data(bd); 331 332 if (!acpi_pcc_retrieve_biosdata(pcc)) 333 return -EIO; 334 335 return pcc->sinf[SINF_AC_CUR_BRIGHT]; 336 } 337 338 static int bl_set_status(struct backlight_device *bd) 339 { 340 struct pcc_acpi *pcc = bl_get_data(bd); 341 int bright = bd->props.brightness; 342 int rc; 343 344 if (!acpi_pcc_retrieve_biosdata(pcc)) 345 return -EIO; 346 347 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT]) 348 bright = pcc->sinf[SINF_AC_MIN_BRIGHT]; 349 350 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT]) 351 bright = pcc->sinf[SINF_DC_MIN_BRIGHT]; 352 353 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] || 354 bright > pcc->sinf[SINF_AC_MAX_BRIGHT]) 355 return -EINVAL; 356 357 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright); 358 if (rc < 0) 359 return rc; 360 361 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright); 362 } 363 364 static const struct backlight_ops pcc_backlight_ops = { 365 .get_brightness = bl_get, 366 .update_status = bl_set_status, 367 }; 368 369 370 /* returns ACPI_SUCCESS if methods to control optical drive are present */ 371 372 static acpi_status check_optd_present(void) 373 { 374 acpi_status status = AE_OK; 375 acpi_handle handle; 376 377 status = acpi_get_handle(NULL, "\\_SB.STAT", &handle); 378 if (ACPI_FAILURE(status)) 379 goto out; 380 status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle); 381 if (ACPI_FAILURE(status)) 382 goto out; 383 status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle); 384 if (ACPI_FAILURE(status)) 385 goto out; 386 387 out: 388 return status; 389 } 390 391 /* get optical driver power state */ 392 393 static int get_optd_power_state(void) 394 { 395 acpi_status status; 396 unsigned long long state; 397 int result; 398 399 status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state); 400 if (ACPI_FAILURE(status)) { 401 pr_err("evaluation error _SB.STAT\n"); 402 result = -EIO; 403 goto out; 404 } 405 switch (state) { 406 case 0: /* power off */ 407 result = 0; 408 break; 409 case 0x0f: /* power on */ 410 result = 1; 411 break; 412 default: 413 result = -EIO; 414 break; 415 } 416 417 out: 418 return result; 419 } 420 421 /* set optical drive power state */ 422 423 static int set_optd_power_state(int new_state) 424 { 425 int result; 426 acpi_status status; 427 428 result = get_optd_power_state(); 429 if (result < 0) 430 goto out; 431 if (new_state == result) 432 goto out; 433 434 switch (new_state) { 435 case 0: /* power off */ 436 /* Call CDDR instead, since they both call the same method 437 * while CDDI takes 1 arg and we are not quite sure what it is. 438 */ 439 status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL); 440 if (ACPI_FAILURE(status)) { 441 pr_err("evaluation error _SB.CDDR\n"); 442 result = -EIO; 443 } 444 break; 445 case 1: /* power on */ 446 status = acpi_evaluate_object(NULL, "\\_SB.FBAY", NULL, NULL); 447 if (ACPI_FAILURE(status)) { 448 pr_err("evaluation error _SB.FBAY\n"); 449 result = -EIO; 450 } 451 break; 452 default: 453 result = -EINVAL; 454 break; 455 } 456 457 out: 458 return result; 459 } 460 461 462 /* sysfs user interface functions */ 463 464 static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr, 465 char *buf) 466 { 467 struct acpi_device *acpi = to_acpi_device(dev); 468 struct pcc_acpi *pcc = acpi_driver_data(acpi); 469 470 if (!acpi_pcc_retrieve_biosdata(pcc)) 471 return -EIO; 472 473 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]); 474 } 475 476 static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr, 477 char *buf) 478 { 479 struct acpi_device *acpi = to_acpi_device(dev); 480 struct pcc_acpi *pcc = acpi_driver_data(acpi); 481 482 if (!acpi_pcc_retrieve_biosdata(pcc)) 483 return -EIO; 484 485 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]); 486 } 487 488 static ssize_t mute_show(struct device *dev, struct device_attribute *attr, 489 char *buf) 490 { 491 struct acpi_device *acpi = to_acpi_device(dev); 492 struct pcc_acpi *pcc = acpi_driver_data(acpi); 493 494 if (!acpi_pcc_retrieve_biosdata(pcc)) 495 return -EIO; 496 497 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]); 498 } 499 500 static ssize_t mute_store(struct device *dev, struct device_attribute *attr, 501 const char *buf, size_t count) 502 { 503 struct acpi_device *acpi = to_acpi_device(dev); 504 struct pcc_acpi *pcc = acpi_driver_data(acpi); 505 int err, val; 506 507 err = kstrtoint(buf, 0, &val); 508 if (err) 509 return err; 510 if (val == 0 || val == 1) { 511 acpi_pcc_write_sset(pcc, SINF_MUTE, val); 512 pcc->mute = val; 513 } 514 515 return count; 516 } 517 518 static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr, 519 char *buf) 520 { 521 struct acpi_device *acpi = to_acpi_device(dev); 522 struct pcc_acpi *pcc = acpi_driver_data(acpi); 523 524 if (!acpi_pcc_retrieve_biosdata(pcc)) 525 return -EIO; 526 527 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sticky_key); 528 } 529 530 static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr, 531 const char *buf, size_t count) 532 { 533 struct acpi_device *acpi = to_acpi_device(dev); 534 struct pcc_acpi *pcc = acpi_driver_data(acpi); 535 int err, val; 536 537 err = kstrtoint(buf, 0, &val); 538 if (err) 539 return err; 540 if (val == 0 || val == 1) { 541 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val); 542 pcc->sticky_key = val; 543 } 544 545 return count; 546 } 547 548 static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr, 549 char *buf) 550 { 551 struct acpi_device *acpi = to_acpi_device(dev); 552 struct pcc_acpi *pcc = acpi_driver_data(acpi); 553 int result; 554 555 if (!acpi_pcc_retrieve_biosdata(pcc)) 556 return -EIO; 557 558 switch (pcc->sinf[SINF_ECO_MODE]) { 559 case (ECO_MODE_OFF + 3): 560 result = 0; 561 break; 562 case (ECO_MODE_ON + 3): 563 result = 1; 564 break; 565 default: 566 result = -EIO; 567 break; 568 } 569 return snprintf(buf, PAGE_SIZE, "%u\n", result); 570 } 571 572 static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr, 573 const char *buf, size_t count) 574 { 575 struct acpi_device *acpi = to_acpi_device(dev); 576 struct pcc_acpi *pcc = acpi_driver_data(acpi); 577 int err, state; 578 579 union acpi_object param[2]; 580 struct acpi_object_list input; 581 acpi_status status; 582 583 param[0].type = ACPI_TYPE_INTEGER; 584 param[0].integer.value = 0x15; 585 param[1].type = ACPI_TYPE_INTEGER; 586 input.count = 2; 587 input.pointer = param; 588 589 err = kstrtoint(buf, 0, &state); 590 if (err) 591 return err; 592 593 switch (state) { 594 case 0: 595 param[1].integer.value = ECO_MODE_OFF; 596 pcc->sinf[SINF_ECO_MODE] = 0; 597 pcc->eco_mode = 0; 598 break; 599 case 1: 600 param[1].integer.value = ECO_MODE_ON; 601 pcc->sinf[SINF_ECO_MODE] = 1; 602 pcc->eco_mode = 1; 603 break; 604 default: 605 /* nothing to do */ 606 return count; 607 } 608 609 status = acpi_evaluate_object(NULL, METHOD_ECWR, 610 &input, NULL); 611 if (ACPI_FAILURE(status)) { 612 pr_err("%s evaluation failed\n", METHOD_ECWR); 613 return -EINVAL; 614 } 615 616 return count; 617 } 618 619 static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr, 620 char *buf) 621 { 622 struct acpi_device *acpi = to_acpi_device(dev); 623 struct pcc_acpi *pcc = acpi_driver_data(acpi); 624 625 if (!acpi_pcc_retrieve_biosdata(pcc)) 626 return -EIO; 627 628 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]); 629 } 630 631 static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr, 632 const char *buf, size_t count) 633 { 634 struct acpi_device *acpi = to_acpi_device(dev); 635 struct pcc_acpi *pcc = acpi_driver_data(acpi); 636 int err, val; 637 638 err = kstrtoint(buf, 0, &val); 639 if (err) 640 return err; 641 if (val >= 0 && val <= 255) { 642 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val); 643 pcc->ac_brightness = val; 644 } 645 646 return count; 647 } 648 649 static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr, 650 char *buf) 651 { 652 struct acpi_device *acpi = to_acpi_device(dev); 653 struct pcc_acpi *pcc = acpi_driver_data(acpi); 654 655 if (!acpi_pcc_retrieve_biosdata(pcc)) 656 return -EIO; 657 658 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]); 659 } 660 661 static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr, 662 const char *buf, size_t count) 663 { 664 struct acpi_device *acpi = to_acpi_device(dev); 665 struct pcc_acpi *pcc = acpi_driver_data(acpi); 666 int err, val; 667 668 err = kstrtoint(buf, 0, &val); 669 if (err) 670 return err; 671 if (val >= 0 && val <= 255) { 672 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val); 673 pcc->dc_brightness = val; 674 } 675 676 return count; 677 } 678 679 static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr, 680 char *buf) 681 { 682 struct acpi_device *acpi = to_acpi_device(dev); 683 struct pcc_acpi *pcc = acpi_driver_data(acpi); 684 685 if (!acpi_pcc_retrieve_biosdata(pcc)) 686 return -EIO; 687 688 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]); 689 } 690 691 static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr, 692 const char *buf, size_t count) 693 { 694 struct acpi_device *acpi = to_acpi_device(dev); 695 struct pcc_acpi *pcc = acpi_driver_data(acpi); 696 int err, val; 697 698 err = kstrtoint(buf, 0, &val); 699 if (err) 700 return err; 701 702 if (val >= 0 && val <= 255) { 703 err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val); 704 pcc->current_brightness = val; 705 } 706 707 return count; 708 } 709 710 static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr, 711 char *buf) 712 { 713 return snprintf(buf, PAGE_SIZE, "%d\n", get_optd_power_state()); 714 } 715 716 static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr, 717 const char *buf, size_t count) 718 { 719 int err, val; 720 721 err = kstrtoint(buf, 10, &val); 722 if (err) 723 return err; 724 set_optd_power_state(val); 725 return count; 726 } 727 728 static DEVICE_ATTR_RO(numbatt); 729 static DEVICE_ATTR_RO(lcdtype); 730 static DEVICE_ATTR_RW(mute); 731 static DEVICE_ATTR_RW(sticky_key); 732 static DEVICE_ATTR_RW(eco_mode); 733 static DEVICE_ATTR_RW(ac_brightness); 734 static DEVICE_ATTR_RW(dc_brightness); 735 static DEVICE_ATTR_RW(current_brightness); 736 static DEVICE_ATTR_RW(cdpower); 737 738 static struct attribute *pcc_sysfs_entries[] = { 739 &dev_attr_numbatt.attr, 740 &dev_attr_lcdtype.attr, 741 &dev_attr_mute.attr, 742 &dev_attr_sticky_key.attr, 743 &dev_attr_eco_mode.attr, 744 &dev_attr_ac_brightness.attr, 745 &dev_attr_dc_brightness.attr, 746 &dev_attr_current_brightness.attr, 747 &dev_attr_cdpower.attr, 748 NULL, 749 }; 750 751 static const struct attribute_group pcc_attr_group = { 752 .name = NULL, /* put in device directory */ 753 .attrs = pcc_sysfs_entries, 754 }; 755 756 757 /* hotkey input device driver */ 758 759 static int sleep_keydown_seen; 760 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc) 761 { 762 struct input_dev *hotk_input_dev = pcc->input_dev; 763 int rc; 764 unsigned long long result; 765 766 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY, 767 NULL, &result); 768 if (ACPI_FAILURE(rc)) { 769 pr_err("error getting hotkey status\n"); 770 return; 771 } 772 773 /* hack: some firmware sends no key down for sleep / hibernate */ 774 if ((result & 0xf) == 0x7 || (result & 0xf) == 0xa) { 775 if (result & 0x80) 776 sleep_keydown_seen = 1; 777 if (!sleep_keydown_seen) 778 sparse_keymap_report_event(hotk_input_dev, 779 result & 0xf, 0x80, false); 780 } 781 782 if ((result & 0xf) == 0x7 || (result & 0xf) == 0x9 || (result & 0xf) == 0xa) { 783 if (!sparse_keymap_report_event(hotk_input_dev, 784 result & 0xf, result & 0x80, false)) 785 pr_err("Unknown hotkey event: 0x%04llx\n", result); 786 } 787 } 788 789 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event) 790 { 791 struct pcc_acpi *pcc = acpi_driver_data(device); 792 793 switch (event) { 794 case HKEY_NOTIFY: 795 acpi_pcc_generate_keyinput(pcc); 796 break; 797 default: 798 /* nothing to do */ 799 break; 800 } 801 } 802 803 static void pcc_optd_notify(acpi_handle handle, u32 event, void *data) 804 { 805 if (event != ACPI_NOTIFY_EJECT_REQUEST) 806 return; 807 808 set_optd_power_state(0); 809 } 810 811 static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node) 812 { 813 acpi_status status; 814 acpi_handle handle; 815 816 status = acpi_get_handle(NULL, node, &handle); 817 818 if (ACPI_SUCCESS(status)) { 819 status = acpi_install_notify_handler(handle, 820 ACPI_SYSTEM_NOTIFY, 821 pcc_optd_notify, pcc); 822 if (ACPI_FAILURE(status)) 823 pr_err("Failed to register notify on %s\n", node); 824 } else 825 return -ENODEV; 826 827 return 0; 828 } 829 830 static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node) 831 { 832 acpi_status status = AE_OK; 833 acpi_handle handle; 834 835 status = acpi_get_handle(NULL, node, &handle); 836 837 if (ACPI_SUCCESS(status)) { 838 status = acpi_remove_notify_handler(handle, 839 ACPI_SYSTEM_NOTIFY, 840 pcc_optd_notify); 841 if (ACPI_FAILURE(status)) 842 pr_err("Error removing optd notify handler %s\n", 843 node); 844 } 845 } 846 847 static int acpi_pcc_init_input(struct pcc_acpi *pcc) 848 { 849 struct input_dev *input_dev; 850 int error; 851 852 input_dev = input_allocate_device(); 853 if (!input_dev) 854 return -ENOMEM; 855 856 input_dev->name = ACPI_PCC_DRIVER_NAME; 857 input_dev->phys = ACPI_PCC_INPUT_PHYS; 858 input_dev->id.bustype = BUS_HOST; 859 input_dev->id.vendor = 0x0001; 860 input_dev->id.product = 0x0001; 861 input_dev->id.version = 0x0100; 862 863 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL); 864 if (error) { 865 pr_err("Unable to setup input device keymap\n"); 866 goto err_free_dev; 867 } 868 869 error = input_register_device(input_dev); 870 if (error) { 871 pr_err("Unable to register input device\n"); 872 goto err_free_dev; 873 } 874 875 pcc->input_dev = input_dev; 876 return 0; 877 878 err_free_dev: 879 input_free_device(input_dev); 880 return error; 881 } 882 883 /* kernel module interface */ 884 885 #ifdef CONFIG_PM_SLEEP 886 static int acpi_pcc_hotkey_resume(struct device *dev) 887 { 888 struct pcc_acpi *pcc; 889 890 if (!dev) 891 return -EINVAL; 892 893 pcc = acpi_driver_data(to_acpi_device(dev)); 894 if (!pcc) 895 return -EINVAL; 896 897 acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute); 898 acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode); 899 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key); 900 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness); 901 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness); 902 acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness); 903 904 return 0; 905 } 906 #endif 907 908 static int acpi_pcc_hotkey_add(struct acpi_device *device) 909 { 910 struct backlight_properties props; 911 struct pcc_acpi *pcc; 912 int num_sifr, result; 913 914 if (!device) 915 return -EINVAL; 916 917 num_sifr = acpi_pcc_get_sqty(device); 918 919 if (num_sifr < 0 || num_sifr > 255) { 920 pr_err("num_sifr out of range"); 921 return -ENODEV; 922 } 923 924 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); 925 if (!pcc) { 926 pr_err("Couldn't allocate mem for pcc"); 927 return -ENOMEM; 928 } 929 930 pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL); 931 if (!pcc->sinf) { 932 result = -ENOMEM; 933 goto out_hotkey; 934 } 935 936 pcc->device = device; 937 pcc->handle = device->handle; 938 pcc->num_sifr = num_sifr; 939 device->driver_data = pcc; 940 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME); 941 strcpy(acpi_device_class(device), ACPI_PCC_CLASS); 942 943 result = acpi_pcc_init_input(pcc); 944 if (result) { 945 pr_err("Error installing keyinput handler\n"); 946 goto out_sinf; 947 } 948 949 if (!acpi_pcc_retrieve_biosdata(pcc)) { 950 result = -EIO; 951 pr_err("Couldn't retrieve BIOS data\n"); 952 goto out_input; 953 } 954 /* initialize backlight */ 955 memset(&props, 0, sizeof(struct backlight_properties)); 956 props.type = BACKLIGHT_PLATFORM; 957 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT]; 958 pcc->backlight = backlight_device_register("panasonic", NULL, pcc, 959 &pcc_backlight_ops, &props); 960 if (IS_ERR(pcc->backlight)) { 961 result = PTR_ERR(pcc->backlight); 962 goto out_input; 963 } 964 965 /* read the initial brightness setting from the hardware */ 966 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; 967 968 /* Reset initial sticky key mode since the hardware register state is not consistent */ 969 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0); 970 pcc->sticky_key = 0; 971 972 pcc->eco_mode = pcc->sinf[SINF_ECO_MODE]; 973 pcc->mute = pcc->sinf[SINF_MUTE]; 974 pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; 975 pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT]; 976 result = pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT]; 977 978 /* add sysfs attributes */ 979 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group); 980 if (result) 981 goto out_backlight; 982 983 /* optical drive initialization */ 984 if (ACPI_SUCCESS(check_optd_present())) { 985 pcc->platform = platform_device_register_simple("panasonic", 986 -1, NULL, 0); 987 if (IS_ERR(pcc->platform)) { 988 result = PTR_ERR(pcc->platform); 989 goto out_backlight; 990 } 991 result = device_create_file(&pcc->platform->dev, 992 &dev_attr_cdpower); 993 pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD"); 994 if (result) 995 goto out_platform; 996 } else { 997 pcc->platform = NULL; 998 } 999 1000 return 0; 1001 1002 out_platform: 1003 platform_device_unregister(pcc->platform); 1004 out_backlight: 1005 backlight_device_unregister(pcc->backlight); 1006 out_input: 1007 input_unregister_device(pcc->input_dev); 1008 out_sinf: 1009 kfree(pcc->sinf); 1010 out_hotkey: 1011 kfree(pcc); 1012 1013 return result; 1014 } 1015 1016 static int acpi_pcc_hotkey_remove(struct acpi_device *device) 1017 { 1018 struct pcc_acpi *pcc = acpi_driver_data(device); 1019 1020 if (!device || !pcc) 1021 return -EINVAL; 1022 1023 if (pcc->platform) { 1024 device_remove_file(&pcc->platform->dev, &dev_attr_cdpower); 1025 platform_device_unregister(pcc->platform); 1026 } 1027 pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD"); 1028 1029 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group); 1030 1031 backlight_device_unregister(pcc->backlight); 1032 1033 input_unregister_device(pcc->input_dev); 1034 1035 kfree(pcc->sinf); 1036 kfree(pcc); 1037 1038 return 0; 1039 } 1040 1041 module_acpi_driver(acpi_pcc_driver); 1042