toshiba_acpi.c revision 11948b9335865dc0ba3a5ca2c9c255291a8d50fb
1/* 2 * toshiba_acpi.c - Toshiba Laptop ACPI Extras 3 * 4 * 5 * Copyright (C) 2002-2004 John Belmonte 6 * Copyright (C) 2008 Philip Langdale 7 * Copyright (C) 2010 Pierre Ducroquet 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * 24 * The devolpment page for this driver is located at 25 * http://memebeam.org/toys/ToshibaAcpiDriver. 26 * 27 * Credits: 28 * Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse 29 * engineering the Windows drivers 30 * Yasushi Nagato - changes for linux kernel 2.4 -> 2.5 31 * Rob Miller - TV out and hotkeys help 32 * 33 * 34 * TODO 35 * 36 */ 37 38#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 39 40#define TOSHIBA_ACPI_VERSION "0.19" 41#define PROC_INTERFACE_VERSION 1 42 43#include <linux/kernel.h> 44#include <linux/module.h> 45#include <linux/init.h> 46#include <linux/types.h> 47#include <linux/proc_fs.h> 48#include <linux/seq_file.h> 49#include <linux/backlight.h> 50#include <linux/rfkill.h> 51#include <linux/input.h> 52#include <linux/input/sparse-keymap.h> 53#include <linux/leds.h> 54#include <linux/slab.h> 55 56#include <asm/uaccess.h> 57 58#include <acpi/acpi_drivers.h> 59 60MODULE_AUTHOR("John Belmonte"); 61MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); 62MODULE_LICENSE("GPL"); 63 64/* Toshiba ACPI method paths */ 65#define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX" 66 67/* Toshiba HCI interface definitions 68 * 69 * HCI is Toshiba's "Hardware Control Interface" which is supposed to 70 * be uniform across all their models. Ideally we would just call 71 * dedicated ACPI methods instead of using this primitive interface. 72 * However the ACPI methods seem to be incomplete in some areas (for 73 * example they allow setting, but not reading, the LCD brightness value), 74 * so this is still useful. 75 */ 76 77#define HCI_WORDS 6 78 79/* operations */ 80#define HCI_SET 0xff00 81#define HCI_GET 0xfe00 82 83/* return codes */ 84#define HCI_SUCCESS 0x0000 85#define HCI_FAILURE 0x1000 86#define HCI_NOT_SUPPORTED 0x8000 87#define HCI_EMPTY 0x8c00 88 89/* registers */ 90#define HCI_FAN 0x0004 91#define HCI_SYSTEM_EVENT 0x0016 92#define HCI_VIDEO_OUT 0x001c 93#define HCI_HOTKEY_EVENT 0x001e 94#define HCI_LCD_BRIGHTNESS 0x002a 95#define HCI_WIRELESS 0x0056 96 97/* field definitions */ 98#define HCI_LCD_BRIGHTNESS_BITS 3 99#define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS) 100#define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS) 101#define HCI_VIDEO_OUT_LCD 0x1 102#define HCI_VIDEO_OUT_CRT 0x2 103#define HCI_VIDEO_OUT_TV 0x4 104#define HCI_WIRELESS_KILL_SWITCH 0x01 105#define HCI_WIRELESS_BT_PRESENT 0x0f 106#define HCI_WIRELESS_BT_ATTACH 0x40 107#define HCI_WIRELESS_BT_POWER 0x80 108 109struct toshiba_acpi_dev { 110 struct acpi_device *acpi_dev; 111 const char *method_hci; 112 struct rfkill *bt_rfk; 113 struct input_dev *hotkey_dev; 114 struct backlight_device *backlight_dev; 115 struct led_classdev led_dev; 116 117 int force_fan; 118 int last_key_event; 119 int key_event_valid; 120 121 int illumination_supported:1; 122 int video_supported:1; 123 int fan_supported:1; 124 int system_event_supported:1; 125 126 struct mutex mutex; 127}; 128 129static const struct acpi_device_id toshiba_device_ids[] = { 130 {"TOS6200", 0}, 131 {"TOS6208", 0}, 132 {"TOS1900", 0}, 133 {"", 0}, 134}; 135MODULE_DEVICE_TABLE(acpi, toshiba_device_ids); 136 137static const struct key_entry toshiba_acpi_keymap[] __devinitconst = { 138 { KE_KEY, 0x101, { KEY_MUTE } }, 139 { KE_KEY, 0x102, { KEY_ZOOMOUT } }, 140 { KE_KEY, 0x103, { KEY_ZOOMIN } }, 141 { KE_KEY, 0x13b, { KEY_COFFEE } }, 142 { KE_KEY, 0x13c, { KEY_BATTERY } }, 143 { KE_KEY, 0x13d, { KEY_SLEEP } }, 144 { KE_KEY, 0x13e, { KEY_SUSPEND } }, 145 { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } }, 146 { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } }, 147 { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } }, 148 { KE_KEY, 0x142, { KEY_WLAN } }, 149 { KE_KEY, 0x143, { KEY_PROG1 } }, 150 { KE_KEY, 0x17f, { KEY_FN } }, 151 { KE_KEY, 0xb05, { KEY_PROG2 } }, 152 { KE_KEY, 0xb06, { KEY_WWW } }, 153 { KE_KEY, 0xb07, { KEY_MAIL } }, 154 { KE_KEY, 0xb30, { KEY_STOP } }, 155 { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } }, 156 { KE_KEY, 0xb32, { KEY_NEXTSONG } }, 157 { KE_KEY, 0xb33, { KEY_PLAYPAUSE } }, 158 { KE_KEY, 0xb5a, { KEY_MEDIA } }, 159 { KE_END, 0 }, 160}; 161 162/* utility 163 */ 164 165static __inline__ void _set_bit(u32 * word, u32 mask, int value) 166{ 167 *word = (*word & ~mask) | (mask * value); 168} 169 170/* acpi interface wrappers 171 */ 172 173static int write_acpi_int(const char *methodName, int val) 174{ 175 struct acpi_object_list params; 176 union acpi_object in_objs[1]; 177 acpi_status status; 178 179 params.count = ARRAY_SIZE(in_objs); 180 params.pointer = in_objs; 181 in_objs[0].type = ACPI_TYPE_INTEGER; 182 in_objs[0].integer.value = val; 183 184 status = acpi_evaluate_object(NULL, (char *)methodName, ¶ms, NULL); 185 return (status == AE_OK) ? 0 : -EIO; 186} 187 188/* Perform a raw HCI call. Here we don't care about input or output buffer 189 * format. 190 */ 191static acpi_status hci_raw(struct toshiba_acpi_dev *dev, 192 const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) 193{ 194 struct acpi_object_list params; 195 union acpi_object in_objs[HCI_WORDS]; 196 struct acpi_buffer results; 197 union acpi_object out_objs[HCI_WORDS + 1]; 198 acpi_status status; 199 int i; 200 201 params.count = HCI_WORDS; 202 params.pointer = in_objs; 203 for (i = 0; i < HCI_WORDS; ++i) { 204 in_objs[i].type = ACPI_TYPE_INTEGER; 205 in_objs[i].integer.value = in[i]; 206 } 207 208 results.length = sizeof(out_objs); 209 results.pointer = out_objs; 210 211 status = acpi_evaluate_object(dev->acpi_dev->handle, 212 (char *)dev->method_hci, ¶ms, 213 &results); 214 if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { 215 for (i = 0; i < out_objs->package.count; ++i) { 216 out[i] = out_objs->package.elements[i].integer.value; 217 } 218 } 219 220 return status; 221} 222 223/* common hci tasks (get or set one or two value) 224 * 225 * In addition to the ACPI status, the HCI system returns a result which 226 * may be useful (such as "not supported"). 227 */ 228 229static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg, 230 u32 in1, u32 *result) 231{ 232 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; 233 u32 out[HCI_WORDS]; 234 acpi_status status = hci_raw(dev, in, out); 235 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 236 return status; 237} 238 239static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg, 240 u32 *out1, u32 *result) 241{ 242 u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; 243 u32 out[HCI_WORDS]; 244 acpi_status status = hci_raw(dev, in, out); 245 *out1 = out[2]; 246 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 247 return status; 248} 249 250static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg, 251 u32 in1, u32 in2, u32 *result) 252{ 253 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 }; 254 u32 out[HCI_WORDS]; 255 acpi_status status = hci_raw(dev, in, out); 256 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 257 return status; 258} 259 260static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg, 261 u32 *out1, u32 *out2, u32 *result) 262{ 263 u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 }; 264 u32 out[HCI_WORDS]; 265 acpi_status status = hci_raw(dev, in, out); 266 *out1 = out[2]; 267 *out2 = out[3]; 268 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 269 return status; 270} 271 272/* Illumination support */ 273static int toshiba_illumination_available(struct toshiba_acpi_dev *dev) 274{ 275 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 276 u32 out[HCI_WORDS]; 277 acpi_status status; 278 279 in[0] = 0xf100; 280 status = hci_raw(dev, in, out); 281 if (ACPI_FAILURE(status)) { 282 pr_info("Illumination device not available\n"); 283 return 0; 284 } 285 in[0] = 0xf400; 286 status = hci_raw(dev, in, out); 287 return 1; 288} 289 290static void toshiba_illumination_set(struct led_classdev *cdev, 291 enum led_brightness brightness) 292{ 293 struct toshiba_acpi_dev *dev = container_of(cdev, 294 struct toshiba_acpi_dev, led_dev); 295 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 296 u32 out[HCI_WORDS]; 297 acpi_status status; 298 299 /* First request : initialize communication. */ 300 in[0] = 0xf100; 301 status = hci_raw(dev, in, out); 302 if (ACPI_FAILURE(status)) { 303 pr_info("Illumination device not available\n"); 304 return; 305 } 306 307 if (brightness) { 308 /* Switch the illumination on */ 309 in[0] = 0xf400; 310 in[1] = 0x14e; 311 in[2] = 1; 312 status = hci_raw(dev, in, out); 313 if (ACPI_FAILURE(status)) { 314 pr_info("ACPI call for illumination failed\n"); 315 return; 316 } 317 } else { 318 /* Switch the illumination off */ 319 in[0] = 0xf400; 320 in[1] = 0x14e; 321 in[2] = 0; 322 status = hci_raw(dev, in, out); 323 if (ACPI_FAILURE(status)) { 324 pr_info("ACPI call for illumination failed.\n"); 325 return; 326 } 327 } 328 329 /* Last request : close communication. */ 330 in[0] = 0xf200; 331 in[1] = 0; 332 in[2] = 0; 333 hci_raw(dev, in, out); 334} 335 336static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev) 337{ 338 struct toshiba_acpi_dev *dev = container_of(cdev, 339 struct toshiba_acpi_dev, led_dev); 340 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 341 u32 out[HCI_WORDS]; 342 acpi_status status; 343 enum led_brightness result; 344 345 /* First request : initialize communication. */ 346 in[0] = 0xf100; 347 status = hci_raw(dev, in, out); 348 if (ACPI_FAILURE(status)) { 349 pr_info("Illumination device not available\n"); 350 return LED_OFF; 351 } 352 353 /* Check the illumination */ 354 in[0] = 0xf300; 355 in[1] = 0x14e; 356 status = hci_raw(dev, in, out); 357 if (ACPI_FAILURE(status)) { 358 pr_info("ACPI call for illumination failed.\n"); 359 return LED_OFF; 360 } 361 362 result = out[2] ? LED_FULL : LED_OFF; 363 364 /* Last request : close communication. */ 365 in[0] = 0xf200; 366 in[1] = 0; 367 in[2] = 0; 368 hci_raw(dev, in, out); 369 370 return result; 371} 372 373/* Bluetooth rfkill handlers */ 374 375static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present) 376{ 377 u32 hci_result; 378 u32 value, value2; 379 380 value = 0; 381 value2 = 0; 382 hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result); 383 if (hci_result == HCI_SUCCESS) 384 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false; 385 386 return hci_result; 387} 388 389static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state) 390{ 391 u32 hci_result; 392 u32 value, value2; 393 394 value = 0; 395 value2 = 0x0001; 396 hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result); 397 398 *radio_state = value & HCI_WIRELESS_KILL_SWITCH; 399 return hci_result; 400} 401 402static int bt_rfkill_set_block(void *data, bool blocked) 403{ 404 struct toshiba_acpi_dev *dev = data; 405 u32 result1, result2; 406 u32 value; 407 int err; 408 bool radio_state; 409 410 value = (blocked == false); 411 412 mutex_lock(&dev->mutex); 413 if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) { 414 err = -EIO; 415 goto out; 416 } 417 418 if (!radio_state) { 419 err = 0; 420 goto out; 421 } 422 423 hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1); 424 hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2); 425 426 if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS) 427 err = -EIO; 428 else 429 err = 0; 430 out: 431 mutex_unlock(&dev->mutex); 432 return err; 433} 434 435static void bt_rfkill_poll(struct rfkill *rfkill, void *data) 436{ 437 bool new_rfk_state; 438 bool value; 439 u32 hci_result; 440 struct toshiba_acpi_dev *dev = data; 441 442 mutex_lock(&dev->mutex); 443 444 hci_result = hci_get_radio_state(dev, &value); 445 if (hci_result != HCI_SUCCESS) { 446 /* Can't do anything useful */ 447 mutex_unlock(&dev->mutex); 448 return; 449 } 450 451 new_rfk_state = value; 452 453 mutex_unlock(&dev->mutex); 454 455 if (rfkill_set_hw_state(rfkill, !new_rfk_state)) 456 bt_rfkill_set_block(data, true); 457} 458 459static const struct rfkill_ops toshiba_rfk_ops = { 460 .set_block = bt_rfkill_set_block, 461 .poll = bt_rfkill_poll, 462}; 463 464static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; 465 466static int get_lcd(struct backlight_device *bd) 467{ 468 struct toshiba_acpi_dev *dev = bl_get_data(bd); 469 u32 hci_result; 470 u32 value; 471 472 hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result); 473 if (hci_result == HCI_SUCCESS) 474 return (value >> HCI_LCD_BRIGHTNESS_SHIFT); 475 476 return -EIO; 477} 478 479static int lcd_proc_show(struct seq_file *m, void *v) 480{ 481 struct toshiba_acpi_dev *dev = m->private; 482 int value; 483 484 if (!dev->backlight_dev) 485 return -ENODEV; 486 487 value = get_lcd(dev->backlight_dev); 488 if (value >= 0) { 489 seq_printf(m, "brightness: %d\n", value); 490 seq_printf(m, "brightness_levels: %d\n", 491 HCI_LCD_BRIGHTNESS_LEVELS); 492 return 0; 493 } 494 495 pr_err("Error reading LCD brightness\n"); 496 return -EIO; 497} 498 499static int lcd_proc_open(struct inode *inode, struct file *file) 500{ 501 return single_open(file, lcd_proc_show, PDE(inode)->data); 502} 503 504static int set_lcd(struct toshiba_acpi_dev *dev, int value) 505{ 506 u32 hci_result; 507 508 value = value << HCI_LCD_BRIGHTNESS_SHIFT; 509 hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result); 510 return hci_result == HCI_SUCCESS ? 0 : -EIO; 511} 512 513static int set_lcd_status(struct backlight_device *bd) 514{ 515 struct toshiba_acpi_dev *dev = bl_get_data(bd); 516 return set_lcd(dev, bd->props.brightness); 517} 518 519static ssize_t lcd_proc_write(struct file *file, const char __user *buf, 520 size_t count, loff_t *pos) 521{ 522 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 523 char cmd[42]; 524 size_t len; 525 int value; 526 int ret; 527 528 len = min(count, sizeof(cmd) - 1); 529 if (copy_from_user(cmd, buf, len)) 530 return -EFAULT; 531 cmd[len] = '\0'; 532 533 if (sscanf(cmd, " brightness : %i", &value) == 1 && 534 value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { 535 ret = set_lcd(dev, value); 536 if (ret == 0) 537 ret = count; 538 } else { 539 ret = -EINVAL; 540 } 541 return ret; 542} 543 544static const struct file_operations lcd_proc_fops = { 545 .owner = THIS_MODULE, 546 .open = lcd_proc_open, 547 .read = seq_read, 548 .llseek = seq_lseek, 549 .release = single_release, 550 .write = lcd_proc_write, 551}; 552 553static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status) 554{ 555 u32 hci_result; 556 557 hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result); 558 return hci_result == HCI_SUCCESS ? 0 : -EIO; 559} 560 561static int video_proc_show(struct seq_file *m, void *v) 562{ 563 struct toshiba_acpi_dev *dev = m->private; 564 u32 value; 565 int ret; 566 567 ret = get_video_status(dev, &value); 568 if (!ret) { 569 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; 570 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; 571 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; 572 seq_printf(m, "lcd_out: %d\n", is_lcd); 573 seq_printf(m, "crt_out: %d\n", is_crt); 574 seq_printf(m, "tv_out: %d\n", is_tv); 575 } 576 577 return ret; 578} 579 580static int video_proc_open(struct inode *inode, struct file *file) 581{ 582 return single_open(file, video_proc_show, PDE(inode)->data); 583} 584 585static ssize_t video_proc_write(struct file *file, const char __user *buf, 586 size_t count, loff_t *pos) 587{ 588 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 589 char *cmd, *buffer; 590 int ret; 591 int value; 592 int remain = count; 593 int lcd_out = -1; 594 int crt_out = -1; 595 int tv_out = -1; 596 u32 video_out; 597 598 cmd = kmalloc(count + 1, GFP_KERNEL); 599 if (!cmd) 600 return -ENOMEM; 601 if (copy_from_user(cmd, buf, count)) { 602 kfree(cmd); 603 return -EFAULT; 604 } 605 cmd[count] = '\0'; 606 607 buffer = cmd; 608 609 /* scan expression. Multiple expressions may be delimited with ; 610 * 611 * NOTE: to keep scanning simple, invalid fields are ignored 612 */ 613 while (remain) { 614 if (sscanf(buffer, " lcd_out : %i", &value) == 1) 615 lcd_out = value & 1; 616 else if (sscanf(buffer, " crt_out : %i", &value) == 1) 617 crt_out = value & 1; 618 else if (sscanf(buffer, " tv_out : %i", &value) == 1) 619 tv_out = value & 1; 620 /* advance to one character past the next ; */ 621 do { 622 ++buffer; 623 --remain; 624 } 625 while (remain && *(buffer - 1) != ';'); 626 } 627 628 kfree(cmd); 629 630 ret = get_video_status(dev, &video_out); 631 if (!ret) { 632 unsigned int new_video_out = video_out; 633 if (lcd_out != -1) 634 _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); 635 if (crt_out != -1) 636 _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); 637 if (tv_out != -1) 638 _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); 639 /* To avoid unnecessary video disruption, only write the new 640 * video setting if something changed. */ 641 if (new_video_out != video_out) 642 ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out); 643 } 644 645 return ret ? ret : count; 646} 647 648static const struct file_operations video_proc_fops = { 649 .owner = THIS_MODULE, 650 .open = video_proc_open, 651 .read = seq_read, 652 .llseek = seq_lseek, 653 .release = single_release, 654 .write = video_proc_write, 655}; 656 657static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status) 658{ 659 u32 hci_result; 660 661 hci_read1(dev, HCI_FAN, status, &hci_result); 662 return hci_result == HCI_SUCCESS ? 0 : -EIO; 663} 664 665static int fan_proc_show(struct seq_file *m, void *v) 666{ 667 struct toshiba_acpi_dev *dev = m->private; 668 int ret; 669 u32 value; 670 671 ret = get_fan_status(dev, &value); 672 if (!ret) { 673 seq_printf(m, "running: %d\n", (value > 0)); 674 seq_printf(m, "force_on: %d\n", dev->force_fan); 675 } 676 677 return ret; 678} 679 680static int fan_proc_open(struct inode *inode, struct file *file) 681{ 682 return single_open(file, fan_proc_show, PDE(inode)->data); 683} 684 685static ssize_t fan_proc_write(struct file *file, const char __user *buf, 686 size_t count, loff_t *pos) 687{ 688 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 689 char cmd[42]; 690 size_t len; 691 int value; 692 u32 hci_result; 693 694 len = min(count, sizeof(cmd) - 1); 695 if (copy_from_user(cmd, buf, len)) 696 return -EFAULT; 697 cmd[len] = '\0'; 698 699 if (sscanf(cmd, " force_on : %i", &value) == 1 && 700 value >= 0 && value <= 1) { 701 hci_write1(dev, HCI_FAN, value, &hci_result); 702 if (hci_result != HCI_SUCCESS) 703 return -EIO; 704 else 705 dev->force_fan = value; 706 } else { 707 return -EINVAL; 708 } 709 710 return count; 711} 712 713static const struct file_operations fan_proc_fops = { 714 .owner = THIS_MODULE, 715 .open = fan_proc_open, 716 .read = seq_read, 717 .llseek = seq_lseek, 718 .release = single_release, 719 .write = fan_proc_write, 720}; 721 722static int keys_proc_show(struct seq_file *m, void *v) 723{ 724 struct toshiba_acpi_dev *dev = m->private; 725 u32 hci_result; 726 u32 value; 727 728 if (!dev->key_event_valid && dev->system_event_supported) { 729 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result); 730 if (hci_result == HCI_SUCCESS) { 731 dev->key_event_valid = 1; 732 dev->last_key_event = value; 733 } else if (hci_result == HCI_EMPTY) { 734 /* better luck next time */ 735 } else if (hci_result == HCI_NOT_SUPPORTED) { 736 /* This is a workaround for an unresolved issue on 737 * some machines where system events sporadically 738 * become disabled. */ 739 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 740 pr_notice("Re-enabled hotkeys\n"); 741 } else { 742 pr_err("Error reading hotkey status\n"); 743 return -EIO; 744 } 745 } 746 747 seq_printf(m, "hotkey_ready: %d\n", dev->key_event_valid); 748 seq_printf(m, "hotkey: 0x%04x\n", dev->last_key_event); 749 return 0; 750} 751 752static int keys_proc_open(struct inode *inode, struct file *file) 753{ 754 return single_open(file, keys_proc_show, PDE(inode)->data); 755} 756 757static ssize_t keys_proc_write(struct file *file, const char __user *buf, 758 size_t count, loff_t *pos) 759{ 760 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 761 char cmd[42]; 762 size_t len; 763 int value; 764 765 len = min(count, sizeof(cmd) - 1); 766 if (copy_from_user(cmd, buf, len)) 767 return -EFAULT; 768 cmd[len] = '\0'; 769 770 if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) { 771 dev->key_event_valid = 0; 772 } else { 773 return -EINVAL; 774 } 775 776 return count; 777} 778 779static const struct file_operations keys_proc_fops = { 780 .owner = THIS_MODULE, 781 .open = keys_proc_open, 782 .read = seq_read, 783 .llseek = seq_lseek, 784 .release = single_release, 785 .write = keys_proc_write, 786}; 787 788static int version_proc_show(struct seq_file *m, void *v) 789{ 790 seq_printf(m, "driver: %s\n", TOSHIBA_ACPI_VERSION); 791 seq_printf(m, "proc_interface: %d\n", PROC_INTERFACE_VERSION); 792 return 0; 793} 794 795static int version_proc_open(struct inode *inode, struct file *file) 796{ 797 return single_open(file, version_proc_show, PDE(inode)->data); 798} 799 800static const struct file_operations version_proc_fops = { 801 .owner = THIS_MODULE, 802 .open = version_proc_open, 803 .read = seq_read, 804 .llseek = seq_lseek, 805 .release = single_release, 806}; 807 808/* proc and module init 809 */ 810 811#define PROC_TOSHIBA "toshiba" 812 813static void __devinit 814create_toshiba_proc_entries(struct toshiba_acpi_dev *dev) 815{ 816 if (dev->backlight_dev) 817 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, 818 &lcd_proc_fops, dev); 819 if (dev->video_supported) 820 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, 821 &video_proc_fops, dev); 822 if (dev->fan_supported) 823 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, 824 &fan_proc_fops, dev); 825 if (dev->hotkey_dev) 826 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, 827 &keys_proc_fops, dev); 828 proc_create_data("version", S_IRUGO, toshiba_proc_dir, 829 &version_proc_fops, dev); 830} 831 832static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev) 833{ 834 if (dev->backlight_dev) 835 remove_proc_entry("lcd", toshiba_proc_dir); 836 if (dev->video_supported) 837 remove_proc_entry("video", toshiba_proc_dir); 838 if (dev->fan_supported) 839 remove_proc_entry("fan", toshiba_proc_dir); 840 if (dev->hotkey_dev) 841 remove_proc_entry("keys", toshiba_proc_dir); 842 remove_proc_entry("version", toshiba_proc_dir); 843} 844 845static const struct backlight_ops toshiba_backlight_data = { 846 .get_brightness = get_lcd, 847 .update_status = set_lcd_status, 848}; 849 850static int __devinit toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev) 851{ 852 acpi_status status; 853 int error; 854 855 dev->hotkey_dev = input_allocate_device(); 856 if (!dev->hotkey_dev) { 857 pr_info("Unable to register input device\n"); 858 return -ENOMEM; 859 } 860 861 dev->hotkey_dev->name = "Toshiba input device"; 862 dev->hotkey_dev->phys = "toshiba_acpi/input0"; 863 dev->hotkey_dev->id.bustype = BUS_HOST; 864 865 error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL); 866 if (error) 867 goto err_free_dev; 868 869 status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL); 870 if (ACPI_FAILURE(status)) { 871 pr_info("Unable to enable hotkeys\n"); 872 error = -ENODEV; 873 goto err_free_keymap; 874 } 875 876 error = input_register_device(dev->hotkey_dev); 877 if (error) { 878 pr_info("Unable to register input device\n"); 879 goto err_free_keymap; 880 } 881 882 return 0; 883 884 err_free_keymap: 885 sparse_keymap_free(dev->hotkey_dev); 886 err_free_dev: 887 input_free_device(dev->hotkey_dev); 888 dev->hotkey_dev = NULL; 889 return error; 890} 891 892static int toshiba_acpi_remove(struct acpi_device *acpi_dev, int type) 893{ 894 struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); 895 896 remove_toshiba_proc_entries(dev); 897 898 if (dev->hotkey_dev) { 899 input_unregister_device(dev->hotkey_dev); 900 sparse_keymap_free(dev->hotkey_dev); 901 } 902 903 if (dev->bt_rfk) { 904 rfkill_unregister(dev->bt_rfk); 905 rfkill_destroy(dev->bt_rfk); 906 } 907 908 if (dev->backlight_dev) 909 backlight_device_unregister(dev->backlight_dev); 910 911 if (dev->illumination_supported) 912 led_classdev_unregister(&dev->led_dev); 913 914 kfree(dev); 915 916 return 0; 917} 918 919static const char * __devinit find_hci_method(acpi_handle handle) 920{ 921 acpi_status status; 922 acpi_handle hci_handle; 923 924 status = acpi_get_handle(handle, "GHCI", &hci_handle); 925 if (ACPI_SUCCESS(status)) 926 return "GHCI"; 927 928 status = acpi_get_handle(handle, "SPFC", &hci_handle); 929 if (ACPI_SUCCESS(status)) 930 return "SPFC"; 931 932 return NULL; 933} 934 935static int __devinit toshiba_acpi_add(struct acpi_device *acpi_dev) 936{ 937 struct toshiba_acpi_dev *dev; 938 const char *hci_method; 939 u32 hci_result; 940 u32 dummy; 941 bool bt_present; 942 int ret = 0; 943 struct backlight_properties props; 944 945 pr_info("Toshiba Laptop ACPI Extras version %s\n", 946 TOSHIBA_ACPI_VERSION); 947 948 hci_method = find_hci_method(acpi_dev->handle); 949 if (!hci_method) { 950 pr_err("HCI interface not found\n"); 951 return -ENODEV; 952 } 953 954 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 955 if (!dev) 956 return -ENOMEM; 957 dev->acpi_dev = acpi_dev; 958 dev->method_hci = hci_method; 959 acpi_dev->driver_data = dev; 960 961 if (toshiba_acpi_setup_keyboard(dev)) 962 pr_info("Unable to activate hotkeys\n"); 963 964 mutex_init(&dev->mutex); 965 966 /* enable event fifo */ 967 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 968 if (hci_result == HCI_SUCCESS) 969 dev->system_event_supported = 1; 970 971 props.type = BACKLIGHT_PLATFORM; 972 props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; 973 dev->backlight_dev = backlight_device_register("toshiba", 974 &acpi_dev->dev, 975 dev, 976 &toshiba_backlight_data, 977 &props); 978 if (IS_ERR(dev->backlight_dev)) { 979 ret = PTR_ERR(dev->backlight_dev); 980 981 pr_err("Could not register toshiba backlight device\n"); 982 dev->backlight_dev = NULL; 983 goto error; 984 } 985 dev->backlight_dev->props.brightness = get_lcd(dev->backlight_dev); 986 987 /* Register rfkill switch for Bluetooth */ 988 if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) { 989 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth", 990 &acpi_dev->dev, 991 RFKILL_TYPE_BLUETOOTH, 992 &toshiba_rfk_ops, 993 dev); 994 if (!dev->bt_rfk) { 995 pr_err("unable to allocate rfkill device\n"); 996 ret = -ENOMEM; 997 goto error; 998 } 999 1000 ret = rfkill_register(dev->bt_rfk); 1001 if (ret) { 1002 pr_err("unable to register rfkill device\n"); 1003 rfkill_destroy(dev->bt_rfk); 1004 goto error; 1005 } 1006 } 1007 1008 if (toshiba_illumination_available(dev)) { 1009 dev->led_dev.name = "toshiba::illumination"; 1010 dev->led_dev.max_brightness = 1; 1011 dev->led_dev.brightness_set = toshiba_illumination_set; 1012 dev->led_dev.brightness_get = toshiba_illumination_get; 1013 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev)) 1014 dev->illumination_supported = 1; 1015 } 1016 1017 /* Determine whether or not BIOS supports fan and video interfaces */ 1018 1019 ret = get_video_status(dev, &dummy); 1020 dev->video_supported = !ret; 1021 1022 ret = get_fan_status(dev, &dummy); 1023 dev->fan_supported = !ret; 1024 1025 create_toshiba_proc_entries(dev); 1026 1027 return 0; 1028 1029error: 1030 toshiba_acpi_remove(acpi_dev, 0); 1031 return ret; 1032} 1033 1034static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event) 1035{ 1036 struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); 1037 u32 hci_result, value; 1038 int retries = 3; 1039 1040 if (!dev->system_event_supported || event != 0x80) 1041 return; 1042 1043 do { 1044 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result); 1045 switch (hci_result) { 1046 case HCI_SUCCESS: 1047 if (value == 0x100) 1048 continue; 1049 /* act on key press; ignore key release */ 1050 if (value & 0x80) 1051 continue; 1052 1053 if (!sparse_keymap_report_event(dev->hotkey_dev, 1054 value, 1, true)) { 1055 pr_info("Unknown key %x\n", 1056 value); 1057 } 1058 break; 1059 case HCI_NOT_SUPPORTED: 1060 /* This is a workaround for an unresolved issue on 1061 * some machines where system events sporadically 1062 * become disabled. */ 1063 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 1064 pr_notice("Re-enabled hotkeys\n"); 1065 /* fall through */ 1066 default: 1067 retries--; 1068 break; 1069 } 1070 } while (retries && hci_result != HCI_EMPTY); 1071} 1072 1073 1074static struct acpi_driver toshiba_acpi_driver = { 1075 .name = "Toshiba ACPI driver", 1076 .owner = THIS_MODULE, 1077 .ids = toshiba_device_ids, 1078 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1079 .ops = { 1080 .add = toshiba_acpi_add, 1081 .remove = toshiba_acpi_remove, 1082 .notify = toshiba_acpi_notify, 1083 }, 1084}; 1085 1086static int __init toshiba_acpi_init(void) 1087{ 1088 int ret; 1089 1090 toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); 1091 if (!toshiba_proc_dir) { 1092 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n"); 1093 return -ENODEV; 1094 } 1095 1096 ret = acpi_bus_register_driver(&toshiba_acpi_driver); 1097 if (ret) { 1098 pr_err("Failed to register ACPI driver: %d\n", ret); 1099 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 1100 } 1101 1102 return ret; 1103} 1104 1105static void __exit toshiba_acpi_exit(void) 1106{ 1107 acpi_bus_unregister_driver(&toshiba_acpi_driver); 1108 if (toshiba_proc_dir) 1109 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 1110} 1111 1112module_init(toshiba_acpi_init); 1113module_exit(toshiba_acpi_exit); 1114