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 #include <linux/workqueue.h> 56 #include <linux/i8042.h> 57 58 #include <asm/uaccess.h> 59 60 #include <acpi/acpi_drivers.h> 61 62 MODULE_AUTHOR("John Belmonte"); 63 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); 64 MODULE_LICENSE("GPL"); 65 66 #define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100" 67 68 /* Scan code for Fn key on TOS1900 models */ 69 #define TOS1900_FN_SCAN 0x6e 70 71 /* Toshiba ACPI method paths */ 72 #define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX" 73 74 /* Toshiba HCI interface definitions 75 * 76 * HCI is Toshiba's "Hardware Control Interface" which is supposed to 77 * be uniform across all their models. Ideally we would just call 78 * dedicated ACPI methods instead of using this primitive interface. 79 * However the ACPI methods seem to be incomplete in some areas (for 80 * example they allow setting, but not reading, the LCD brightness value), 81 * so this is still useful. 82 */ 83 84 #define HCI_WORDS 6 85 86 /* operations */ 87 #define HCI_SET 0xff00 88 #define HCI_GET 0xfe00 89 90 /* return codes */ 91 #define HCI_SUCCESS 0x0000 92 #define HCI_FAILURE 0x1000 93 #define HCI_NOT_SUPPORTED 0x8000 94 #define HCI_EMPTY 0x8c00 95 96 /* registers */ 97 #define HCI_FAN 0x0004 98 #define HCI_TR_BACKLIGHT 0x0005 99 #define HCI_SYSTEM_EVENT 0x0016 100 #define HCI_VIDEO_OUT 0x001c 101 #define HCI_HOTKEY_EVENT 0x001e 102 #define HCI_LCD_BRIGHTNESS 0x002a 103 #define HCI_WIRELESS 0x0056 104 105 /* field definitions */ 106 #define HCI_HOTKEY_DISABLE 0x0b 107 #define HCI_HOTKEY_ENABLE 0x09 108 #define HCI_LCD_BRIGHTNESS_BITS 3 109 #define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS) 110 #define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS) 111 #define HCI_VIDEO_OUT_LCD 0x1 112 #define HCI_VIDEO_OUT_CRT 0x2 113 #define HCI_VIDEO_OUT_TV 0x4 114 #define HCI_WIRELESS_KILL_SWITCH 0x01 115 #define HCI_WIRELESS_BT_PRESENT 0x0f 116 #define HCI_WIRELESS_BT_ATTACH 0x40 117 #define HCI_WIRELESS_BT_POWER 0x80 118 119 struct toshiba_acpi_dev { 120 struct acpi_device *acpi_dev; 121 const char *method_hci; 122 struct rfkill *bt_rfk; 123 struct input_dev *hotkey_dev; 124 struct work_struct hotkey_work; 125 struct backlight_device *backlight_dev; 126 struct led_classdev led_dev; 127 128 int force_fan; 129 int last_key_event; 130 int key_event_valid; 131 132 unsigned int illumination_supported:1; 133 unsigned int video_supported:1; 134 unsigned int fan_supported:1; 135 unsigned int system_event_supported:1; 136 unsigned int ntfy_supported:1; 137 unsigned int info_supported:1; 138 unsigned int tr_backlight_supported:1; 139 140 struct mutex mutex; 141 }; 142 143 static struct toshiba_acpi_dev *toshiba_acpi; 144 145 static const struct acpi_device_id toshiba_device_ids[] = { 146 {"TOS6200", 0}, 147 {"TOS6208", 0}, 148 {"TOS1900", 0}, 149 {"", 0}, 150 }; 151 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids); 152 153 static const struct key_entry toshiba_acpi_keymap[] = { 154 { KE_KEY, 0x101, { KEY_MUTE } }, 155 { KE_KEY, 0x102, { KEY_ZOOMOUT } }, 156 { KE_KEY, 0x103, { KEY_ZOOMIN } }, 157 { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } }, 158 { KE_KEY, 0x139, { KEY_ZOOMRESET } }, 159 { KE_KEY, 0x13b, { KEY_COFFEE } }, 160 { KE_KEY, 0x13c, { KEY_BATTERY } }, 161 { KE_KEY, 0x13d, { KEY_SLEEP } }, 162 { KE_KEY, 0x13e, { KEY_SUSPEND } }, 163 { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } }, 164 { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } }, 165 { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } }, 166 { KE_KEY, 0x142, { KEY_WLAN } }, 167 { KE_KEY, 0x143, { KEY_TOUCHPAD_TOGGLE } }, 168 { KE_KEY, 0x17f, { KEY_FN } }, 169 { KE_KEY, 0xb05, { KEY_PROG2 } }, 170 { KE_KEY, 0xb06, { KEY_WWW } }, 171 { KE_KEY, 0xb07, { KEY_MAIL } }, 172 { KE_KEY, 0xb30, { KEY_STOP } }, 173 { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } }, 174 { KE_KEY, 0xb32, { KEY_NEXTSONG } }, 175 { KE_KEY, 0xb33, { KEY_PLAYPAUSE } }, 176 { KE_KEY, 0xb5a, { KEY_MEDIA } }, 177 { KE_IGNORE, 0x1430, { KEY_RESERVED } }, 178 { KE_END, 0 }, 179 }; 180 181 /* utility 182 */ 183 184 static __inline__ void _set_bit(u32 * word, u32 mask, int value) 185 { 186 *word = (*word & ~mask) | (mask * value); 187 } 188 189 /* acpi interface wrappers 190 */ 191 192 static int write_acpi_int(const char *methodName, int val) 193 { 194 acpi_status status; 195 196 status = acpi_execute_simple_method(NULL, (char *)methodName, val); 197 return (status == AE_OK) ? 0 : -EIO; 198 } 199 200 /* Perform a raw HCI call. Here we don't care about input or output buffer 201 * format. 202 */ 203 static acpi_status hci_raw(struct toshiba_acpi_dev *dev, 204 const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) 205 { 206 struct acpi_object_list params; 207 union acpi_object in_objs[HCI_WORDS]; 208 struct acpi_buffer results; 209 union acpi_object out_objs[HCI_WORDS + 1]; 210 acpi_status status; 211 int i; 212 213 params.count = HCI_WORDS; 214 params.pointer = in_objs; 215 for (i = 0; i < HCI_WORDS; ++i) { 216 in_objs[i].type = ACPI_TYPE_INTEGER; 217 in_objs[i].integer.value = in[i]; 218 } 219 220 results.length = sizeof(out_objs); 221 results.pointer = out_objs; 222 223 status = acpi_evaluate_object(dev->acpi_dev->handle, 224 (char *)dev->method_hci, ¶ms, 225 &results); 226 if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { 227 for (i = 0; i < out_objs->package.count; ++i) { 228 out[i] = out_objs->package.elements[i].integer.value; 229 } 230 } 231 232 return status; 233 } 234 235 /* common hci tasks (get or set one or two value) 236 * 237 * In addition to the ACPI status, the HCI system returns a result which 238 * may be useful (such as "not supported"). 239 */ 240 241 static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg, 242 u32 in1, u32 *result) 243 { 244 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; 245 u32 out[HCI_WORDS]; 246 acpi_status status = hci_raw(dev, in, out); 247 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 248 return status; 249 } 250 251 static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg, 252 u32 *out1, u32 *result) 253 { 254 u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; 255 u32 out[HCI_WORDS]; 256 acpi_status status = hci_raw(dev, in, out); 257 *out1 = out[2]; 258 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 259 return status; 260 } 261 262 static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg, 263 u32 in1, u32 in2, u32 *result) 264 { 265 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 }; 266 u32 out[HCI_WORDS]; 267 acpi_status status = hci_raw(dev, in, out); 268 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 269 return status; 270 } 271 272 static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg, 273 u32 *out1, u32 *out2, u32 *result) 274 { 275 u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 }; 276 u32 out[HCI_WORDS]; 277 acpi_status status = hci_raw(dev, in, out); 278 *out1 = out[2]; 279 *out2 = out[3]; 280 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 281 return status; 282 } 283 284 /* Illumination support */ 285 static int toshiba_illumination_available(struct toshiba_acpi_dev *dev) 286 { 287 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 288 u32 out[HCI_WORDS]; 289 acpi_status status; 290 291 in[0] = 0xf100; 292 status = hci_raw(dev, in, out); 293 if (ACPI_FAILURE(status)) { 294 pr_info("Illumination device not available\n"); 295 return 0; 296 } 297 in[0] = 0xf400; 298 status = hci_raw(dev, in, out); 299 return 1; 300 } 301 302 static void toshiba_illumination_set(struct led_classdev *cdev, 303 enum led_brightness brightness) 304 { 305 struct toshiba_acpi_dev *dev = container_of(cdev, 306 struct toshiba_acpi_dev, led_dev); 307 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 308 u32 out[HCI_WORDS]; 309 acpi_status status; 310 311 /* First request : initialize communication. */ 312 in[0] = 0xf100; 313 status = hci_raw(dev, in, out); 314 if (ACPI_FAILURE(status)) { 315 pr_info("Illumination device not available\n"); 316 return; 317 } 318 319 if (brightness) { 320 /* Switch the illumination on */ 321 in[0] = 0xf400; 322 in[1] = 0x14e; 323 in[2] = 1; 324 status = hci_raw(dev, in, out); 325 if (ACPI_FAILURE(status)) { 326 pr_info("ACPI call for illumination failed\n"); 327 return; 328 } 329 } else { 330 /* Switch the illumination off */ 331 in[0] = 0xf400; 332 in[1] = 0x14e; 333 in[2] = 0; 334 status = hci_raw(dev, in, out); 335 if (ACPI_FAILURE(status)) { 336 pr_info("ACPI call for illumination failed.\n"); 337 return; 338 } 339 } 340 341 /* Last request : close communication. */ 342 in[0] = 0xf200; 343 in[1] = 0; 344 in[2] = 0; 345 hci_raw(dev, in, out); 346 } 347 348 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev) 349 { 350 struct toshiba_acpi_dev *dev = container_of(cdev, 351 struct toshiba_acpi_dev, led_dev); 352 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 353 u32 out[HCI_WORDS]; 354 acpi_status status; 355 enum led_brightness result; 356 357 /* First request : initialize communication. */ 358 in[0] = 0xf100; 359 status = hci_raw(dev, in, out); 360 if (ACPI_FAILURE(status)) { 361 pr_info("Illumination device not available\n"); 362 return LED_OFF; 363 } 364 365 /* Check the illumination */ 366 in[0] = 0xf300; 367 in[1] = 0x14e; 368 status = hci_raw(dev, in, out); 369 if (ACPI_FAILURE(status)) { 370 pr_info("ACPI call for illumination failed.\n"); 371 return LED_OFF; 372 } 373 374 result = out[2] ? LED_FULL : LED_OFF; 375 376 /* Last request : close communication. */ 377 in[0] = 0xf200; 378 in[1] = 0; 379 in[2] = 0; 380 hci_raw(dev, in, out); 381 382 return result; 383 } 384 385 /* Bluetooth rfkill handlers */ 386 387 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present) 388 { 389 u32 hci_result; 390 u32 value, value2; 391 392 value = 0; 393 value2 = 0; 394 hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result); 395 if (hci_result == HCI_SUCCESS) 396 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false; 397 398 return hci_result; 399 } 400 401 static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state) 402 { 403 u32 hci_result; 404 u32 value, value2; 405 406 value = 0; 407 value2 = 0x0001; 408 hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result); 409 410 *radio_state = value & HCI_WIRELESS_KILL_SWITCH; 411 return hci_result; 412 } 413 414 static int bt_rfkill_set_block(void *data, bool blocked) 415 { 416 struct toshiba_acpi_dev *dev = data; 417 u32 result1, result2; 418 u32 value; 419 int err; 420 bool radio_state; 421 422 value = (blocked == false); 423 424 mutex_lock(&dev->mutex); 425 if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) { 426 err = -EIO; 427 goto out; 428 } 429 430 if (!radio_state) { 431 err = 0; 432 goto out; 433 } 434 435 hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1); 436 hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2); 437 438 if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS) 439 err = -EIO; 440 else 441 err = 0; 442 out: 443 mutex_unlock(&dev->mutex); 444 return err; 445 } 446 447 static void bt_rfkill_poll(struct rfkill *rfkill, void *data) 448 { 449 bool new_rfk_state; 450 bool value; 451 u32 hci_result; 452 struct toshiba_acpi_dev *dev = data; 453 454 mutex_lock(&dev->mutex); 455 456 hci_result = hci_get_radio_state(dev, &value); 457 if (hci_result != HCI_SUCCESS) { 458 /* Can't do anything useful */ 459 mutex_unlock(&dev->mutex); 460 return; 461 } 462 463 new_rfk_state = value; 464 465 mutex_unlock(&dev->mutex); 466 467 if (rfkill_set_hw_state(rfkill, !new_rfk_state)) 468 bt_rfkill_set_block(data, true); 469 } 470 471 static const struct rfkill_ops toshiba_rfk_ops = { 472 .set_block = bt_rfkill_set_block, 473 .poll = bt_rfkill_poll, 474 }; 475 476 static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, bool *enabled) 477 { 478 u32 hci_result; 479 u32 status; 480 481 hci_read1(dev, HCI_TR_BACKLIGHT, &status, &hci_result); 482 *enabled = !status; 483 return hci_result == HCI_SUCCESS ? 0 : -EIO; 484 } 485 486 static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, bool enable) 487 { 488 u32 hci_result; 489 u32 value = !enable; 490 491 hci_write1(dev, HCI_TR_BACKLIGHT, value, &hci_result); 492 return hci_result == HCI_SUCCESS ? 0 : -EIO; 493 } 494 495 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; 496 497 static int __get_lcd_brightness(struct toshiba_acpi_dev *dev) 498 { 499 u32 hci_result; 500 u32 value; 501 int brightness = 0; 502 503 if (dev->tr_backlight_supported) { 504 bool enabled; 505 int ret = get_tr_backlight_status(dev, &enabled); 506 if (ret) 507 return ret; 508 if (enabled) 509 return 0; 510 brightness++; 511 } 512 513 hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result); 514 if (hci_result == HCI_SUCCESS) 515 return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT); 516 517 return -EIO; 518 } 519 520 static int get_lcd_brightness(struct backlight_device *bd) 521 { 522 struct toshiba_acpi_dev *dev = bl_get_data(bd); 523 return __get_lcd_brightness(dev); 524 } 525 526 static int lcd_proc_show(struct seq_file *m, void *v) 527 { 528 struct toshiba_acpi_dev *dev = m->private; 529 int value; 530 int levels; 531 532 if (!dev->backlight_dev) 533 return -ENODEV; 534 535 levels = dev->backlight_dev->props.max_brightness + 1; 536 value = get_lcd_brightness(dev->backlight_dev); 537 if (value >= 0) { 538 seq_printf(m, "brightness: %d\n", value); 539 seq_printf(m, "brightness_levels: %d\n", levels); 540 return 0; 541 } 542 543 pr_err("Error reading LCD brightness\n"); 544 return -EIO; 545 } 546 547 static int lcd_proc_open(struct inode *inode, struct file *file) 548 { 549 return single_open(file, lcd_proc_show, PDE_DATA(inode)); 550 } 551 552 static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value) 553 { 554 u32 hci_result; 555 556 if (dev->tr_backlight_supported) { 557 bool enable = !value; 558 int ret = set_tr_backlight_status(dev, enable); 559 if (ret) 560 return ret; 561 if (value) 562 value--; 563 } 564 565 value = value << HCI_LCD_BRIGHTNESS_SHIFT; 566 hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result); 567 return hci_result == HCI_SUCCESS ? 0 : -EIO; 568 } 569 570 static int set_lcd_status(struct backlight_device *bd) 571 { 572 struct toshiba_acpi_dev *dev = bl_get_data(bd); 573 return set_lcd_brightness(dev, bd->props.brightness); 574 } 575 576 static ssize_t lcd_proc_write(struct file *file, const char __user *buf, 577 size_t count, loff_t *pos) 578 { 579 struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file)); 580 char cmd[42]; 581 size_t len; 582 int value; 583 int ret; 584 int levels = dev->backlight_dev->props.max_brightness + 1; 585 586 len = min(count, sizeof(cmd) - 1); 587 if (copy_from_user(cmd, buf, len)) 588 return -EFAULT; 589 cmd[len] = '\0'; 590 591 if (sscanf(cmd, " brightness : %i", &value) == 1 && 592 value >= 0 && value < levels) { 593 ret = set_lcd_brightness(dev, value); 594 if (ret == 0) 595 ret = count; 596 } else { 597 ret = -EINVAL; 598 } 599 return ret; 600 } 601 602 static const struct file_operations lcd_proc_fops = { 603 .owner = THIS_MODULE, 604 .open = lcd_proc_open, 605 .read = seq_read, 606 .llseek = seq_lseek, 607 .release = single_release, 608 .write = lcd_proc_write, 609 }; 610 611 static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status) 612 { 613 u32 hci_result; 614 615 hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result); 616 return hci_result == HCI_SUCCESS ? 0 : -EIO; 617 } 618 619 static int video_proc_show(struct seq_file *m, void *v) 620 { 621 struct toshiba_acpi_dev *dev = m->private; 622 u32 value; 623 int ret; 624 625 ret = get_video_status(dev, &value); 626 if (!ret) { 627 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; 628 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; 629 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; 630 seq_printf(m, "lcd_out: %d\n", is_lcd); 631 seq_printf(m, "crt_out: %d\n", is_crt); 632 seq_printf(m, "tv_out: %d\n", is_tv); 633 } 634 635 return ret; 636 } 637 638 static int video_proc_open(struct inode *inode, struct file *file) 639 { 640 return single_open(file, video_proc_show, PDE_DATA(inode)); 641 } 642 643 static ssize_t video_proc_write(struct file *file, const char __user *buf, 644 size_t count, loff_t *pos) 645 { 646 struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file)); 647 char *cmd, *buffer; 648 int ret; 649 int value; 650 int remain = count; 651 int lcd_out = -1; 652 int crt_out = -1; 653 int tv_out = -1; 654 u32 video_out; 655 656 cmd = kmalloc(count + 1, GFP_KERNEL); 657 if (!cmd) 658 return -ENOMEM; 659 if (copy_from_user(cmd, buf, count)) { 660 kfree(cmd); 661 return -EFAULT; 662 } 663 cmd[count] = '\0'; 664 665 buffer = cmd; 666 667 /* scan expression. Multiple expressions may be delimited with ; 668 * 669 * NOTE: to keep scanning simple, invalid fields are ignored 670 */ 671 while (remain) { 672 if (sscanf(buffer, " lcd_out : %i", &value) == 1) 673 lcd_out = value & 1; 674 else if (sscanf(buffer, " crt_out : %i", &value) == 1) 675 crt_out = value & 1; 676 else if (sscanf(buffer, " tv_out : %i", &value) == 1) 677 tv_out = value & 1; 678 /* advance to one character past the next ; */ 679 do { 680 ++buffer; 681 --remain; 682 } 683 while (remain && *(buffer - 1) != ';'); 684 } 685 686 kfree(cmd); 687 688 ret = get_video_status(dev, &video_out); 689 if (!ret) { 690 unsigned int new_video_out = video_out; 691 if (lcd_out != -1) 692 _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); 693 if (crt_out != -1) 694 _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); 695 if (tv_out != -1) 696 _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); 697 /* To avoid unnecessary video disruption, only write the new 698 * video setting if something changed. */ 699 if (new_video_out != video_out) 700 ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out); 701 } 702 703 return ret ? ret : count; 704 } 705 706 static const struct file_operations video_proc_fops = { 707 .owner = THIS_MODULE, 708 .open = video_proc_open, 709 .read = seq_read, 710 .llseek = seq_lseek, 711 .release = single_release, 712 .write = video_proc_write, 713 }; 714 715 static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status) 716 { 717 u32 hci_result; 718 719 hci_read1(dev, HCI_FAN, status, &hci_result); 720 return hci_result == HCI_SUCCESS ? 0 : -EIO; 721 } 722 723 static int fan_proc_show(struct seq_file *m, void *v) 724 { 725 struct toshiba_acpi_dev *dev = m->private; 726 int ret; 727 u32 value; 728 729 ret = get_fan_status(dev, &value); 730 if (!ret) { 731 seq_printf(m, "running: %d\n", (value > 0)); 732 seq_printf(m, "force_on: %d\n", dev->force_fan); 733 } 734 735 return ret; 736 } 737 738 static int fan_proc_open(struct inode *inode, struct file *file) 739 { 740 return single_open(file, fan_proc_show, PDE_DATA(inode)); 741 } 742 743 static ssize_t fan_proc_write(struct file *file, const char __user *buf, 744 size_t count, loff_t *pos) 745 { 746 struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file)); 747 char cmd[42]; 748 size_t len; 749 int value; 750 u32 hci_result; 751 752 len = min(count, sizeof(cmd) - 1); 753 if (copy_from_user(cmd, buf, len)) 754 return -EFAULT; 755 cmd[len] = '\0'; 756 757 if (sscanf(cmd, " force_on : %i", &value) == 1 && 758 value >= 0 && value <= 1) { 759 hci_write1(dev, HCI_FAN, value, &hci_result); 760 if (hci_result != HCI_SUCCESS) 761 return -EIO; 762 else 763 dev->force_fan = value; 764 } else { 765 return -EINVAL; 766 } 767 768 return count; 769 } 770 771 static const struct file_operations fan_proc_fops = { 772 .owner = THIS_MODULE, 773 .open = fan_proc_open, 774 .read = seq_read, 775 .llseek = seq_lseek, 776 .release = single_release, 777 .write = fan_proc_write, 778 }; 779 780 static int keys_proc_show(struct seq_file *m, void *v) 781 { 782 struct toshiba_acpi_dev *dev = m->private; 783 u32 hci_result; 784 u32 value; 785 786 if (!dev->key_event_valid && dev->system_event_supported) { 787 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result); 788 if (hci_result == HCI_SUCCESS) { 789 dev->key_event_valid = 1; 790 dev->last_key_event = value; 791 } else if (hci_result == HCI_EMPTY) { 792 /* better luck next time */ 793 } else if (hci_result == HCI_NOT_SUPPORTED) { 794 /* This is a workaround for an unresolved issue on 795 * some machines where system events sporadically 796 * become disabled. */ 797 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 798 pr_notice("Re-enabled hotkeys\n"); 799 } else { 800 pr_err("Error reading hotkey status\n"); 801 return -EIO; 802 } 803 } 804 805 seq_printf(m, "hotkey_ready: %d\n", dev->key_event_valid); 806 seq_printf(m, "hotkey: 0x%04x\n", dev->last_key_event); 807 return 0; 808 } 809 810 static int keys_proc_open(struct inode *inode, struct file *file) 811 { 812 return single_open(file, keys_proc_show, PDE_DATA(inode)); 813 } 814 815 static ssize_t keys_proc_write(struct file *file, const char __user *buf, 816 size_t count, loff_t *pos) 817 { 818 struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file)); 819 char cmd[42]; 820 size_t len; 821 int value; 822 823 len = min(count, sizeof(cmd) - 1); 824 if (copy_from_user(cmd, buf, len)) 825 return -EFAULT; 826 cmd[len] = '\0'; 827 828 if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) { 829 dev->key_event_valid = 0; 830 } else { 831 return -EINVAL; 832 } 833 834 return count; 835 } 836 837 static const struct file_operations keys_proc_fops = { 838 .owner = THIS_MODULE, 839 .open = keys_proc_open, 840 .read = seq_read, 841 .llseek = seq_lseek, 842 .release = single_release, 843 .write = keys_proc_write, 844 }; 845 846 static int version_proc_show(struct seq_file *m, void *v) 847 { 848 seq_printf(m, "driver: %s\n", TOSHIBA_ACPI_VERSION); 849 seq_printf(m, "proc_interface: %d\n", PROC_INTERFACE_VERSION); 850 return 0; 851 } 852 853 static int version_proc_open(struct inode *inode, struct file *file) 854 { 855 return single_open(file, version_proc_show, PDE_DATA(inode)); 856 } 857 858 static const struct file_operations version_proc_fops = { 859 .owner = THIS_MODULE, 860 .open = version_proc_open, 861 .read = seq_read, 862 .llseek = seq_lseek, 863 .release = single_release, 864 }; 865 866 /* proc and module init 867 */ 868 869 #define PROC_TOSHIBA "toshiba" 870 871 static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev) 872 { 873 if (dev->backlight_dev) 874 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, 875 &lcd_proc_fops, dev); 876 if (dev->video_supported) 877 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, 878 &video_proc_fops, dev); 879 if (dev->fan_supported) 880 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, 881 &fan_proc_fops, dev); 882 if (dev->hotkey_dev) 883 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, 884 &keys_proc_fops, dev); 885 proc_create_data("version", S_IRUGO, toshiba_proc_dir, 886 &version_proc_fops, dev); 887 } 888 889 static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev) 890 { 891 if (dev->backlight_dev) 892 remove_proc_entry("lcd", toshiba_proc_dir); 893 if (dev->video_supported) 894 remove_proc_entry("video", toshiba_proc_dir); 895 if (dev->fan_supported) 896 remove_proc_entry("fan", toshiba_proc_dir); 897 if (dev->hotkey_dev) 898 remove_proc_entry("keys", toshiba_proc_dir); 899 remove_proc_entry("version", toshiba_proc_dir); 900 } 901 902 static const struct backlight_ops toshiba_backlight_data = { 903 .options = BL_CORE_SUSPENDRESUME, 904 .get_brightness = get_lcd_brightness, 905 .update_status = set_lcd_status, 906 }; 907 908 static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str, 909 struct serio *port) 910 { 911 if (str & 0x20) 912 return false; 913 914 if (unlikely(data == 0xe0)) 915 return false; 916 917 if ((data & 0x7f) == TOS1900_FN_SCAN) { 918 schedule_work(&toshiba_acpi->hotkey_work); 919 return true; 920 } 921 922 return false; 923 } 924 925 static void toshiba_acpi_hotkey_work(struct work_struct *work) 926 { 927 acpi_handle ec_handle = ec_get_handle(); 928 acpi_status status; 929 930 if (!ec_handle) 931 return; 932 933 status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL); 934 if (ACPI_FAILURE(status)) 935 pr_err("ACPI NTFY method execution failed\n"); 936 } 937 938 /* 939 * Returns hotkey scancode, or < 0 on failure. 940 */ 941 static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev) 942 { 943 unsigned long long value; 944 acpi_status status; 945 946 status = acpi_evaluate_integer(dev->acpi_dev->handle, "INFO", 947 NULL, &value); 948 if (ACPI_FAILURE(status)) { 949 pr_err("ACPI INFO method execution failed\n"); 950 return -EIO; 951 } 952 953 return value; 954 } 955 956 static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev, 957 int scancode) 958 { 959 if (scancode == 0x100) 960 return; 961 962 /* act on key press; ignore key release */ 963 if (scancode & 0x80) 964 return; 965 966 if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true)) 967 pr_info("Unknown key %x\n", scancode); 968 } 969 970 static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev) 971 { 972 acpi_status status; 973 acpi_handle ec_handle; 974 int error; 975 u32 hci_result; 976 977 dev->hotkey_dev = input_allocate_device(); 978 if (!dev->hotkey_dev) 979 return -ENOMEM; 980 981 dev->hotkey_dev->name = "Toshiba input device"; 982 dev->hotkey_dev->phys = "toshiba_acpi/input0"; 983 dev->hotkey_dev->id.bustype = BUS_HOST; 984 985 error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL); 986 if (error) 987 goto err_free_dev; 988 989 /* 990 * For some machines the SCI responsible for providing hotkey 991 * notification doesn't fire. We can trigger the notification 992 * whenever the Fn key is pressed using the NTFY method, if 993 * supported, so if it's present set up an i8042 key filter 994 * for this purpose. 995 */ 996 status = AE_ERROR; 997 ec_handle = ec_get_handle(); 998 if (ec_handle && acpi_has_method(ec_handle, "NTFY")) { 999 INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work); 1000 1001 error = i8042_install_filter(toshiba_acpi_i8042_filter); 1002 if (error) { 1003 pr_err("Error installing key filter\n"); 1004 goto err_free_keymap; 1005 } 1006 1007 dev->ntfy_supported = 1; 1008 } 1009 1010 /* 1011 * Determine hotkey query interface. Prefer using the INFO 1012 * method when it is available. 1013 */ 1014 if (acpi_has_method(dev->acpi_dev->handle, "INFO")) 1015 dev->info_supported = 1; 1016 else { 1017 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 1018 if (hci_result == HCI_SUCCESS) 1019 dev->system_event_supported = 1; 1020 } 1021 1022 if (!dev->info_supported && !dev->system_event_supported) { 1023 pr_warn("No hotkey query interface found\n"); 1024 goto err_remove_filter; 1025 } 1026 1027 status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL); 1028 if (ACPI_FAILURE(status)) { 1029 pr_info("Unable to enable hotkeys\n"); 1030 error = -ENODEV; 1031 goto err_remove_filter; 1032 } 1033 1034 error = input_register_device(dev->hotkey_dev); 1035 if (error) { 1036 pr_info("Unable to register input device\n"); 1037 goto err_remove_filter; 1038 } 1039 1040 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &hci_result); 1041 return 0; 1042 1043 err_remove_filter: 1044 if (dev->ntfy_supported) 1045 i8042_remove_filter(toshiba_acpi_i8042_filter); 1046 err_free_keymap: 1047 sparse_keymap_free(dev->hotkey_dev); 1048 err_free_dev: 1049 input_free_device(dev->hotkey_dev); 1050 dev->hotkey_dev = NULL; 1051 return error; 1052 } 1053 1054 static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev) 1055 { 1056 struct backlight_properties props; 1057 int brightness; 1058 int ret; 1059 bool enabled; 1060 1061 /* 1062 * Some machines don't support the backlight methods at all, and 1063 * others support it read-only. Either of these is pretty useless, 1064 * so only register the backlight device if the backlight method 1065 * supports both reads and writes. 1066 */ 1067 brightness = __get_lcd_brightness(dev); 1068 if (brightness < 0) 1069 return 0; 1070 ret = set_lcd_brightness(dev, brightness); 1071 if (ret) { 1072 pr_debug("Backlight method is read-only, disabling backlight support\n"); 1073 return 0; 1074 } 1075 1076 /* Determine whether or not BIOS supports transflective backlight */ 1077 ret = get_tr_backlight_status(dev, &enabled); 1078 dev->tr_backlight_supported = !ret; 1079 1080 memset(&props, 0, sizeof(props)); 1081 props.type = BACKLIGHT_PLATFORM; 1082 props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; 1083 1084 /* adding an extra level and having 0 change to transflective mode */ 1085 if (dev->tr_backlight_supported) 1086 props.max_brightness++; 1087 1088 dev->backlight_dev = backlight_device_register("toshiba", 1089 &dev->acpi_dev->dev, 1090 dev, 1091 &toshiba_backlight_data, 1092 &props); 1093 if (IS_ERR(dev->backlight_dev)) { 1094 ret = PTR_ERR(dev->backlight_dev); 1095 pr_err("Could not register toshiba backlight device\n"); 1096 dev->backlight_dev = NULL; 1097 return ret; 1098 } 1099 1100 dev->backlight_dev->props.brightness = brightness; 1101 return 0; 1102 } 1103 1104 static int toshiba_acpi_remove(struct acpi_device *acpi_dev) 1105 { 1106 struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); 1107 1108 remove_toshiba_proc_entries(dev); 1109 1110 if (dev->ntfy_supported) { 1111 i8042_remove_filter(toshiba_acpi_i8042_filter); 1112 cancel_work_sync(&dev->hotkey_work); 1113 } 1114 1115 if (dev->hotkey_dev) { 1116 input_unregister_device(dev->hotkey_dev); 1117 sparse_keymap_free(dev->hotkey_dev); 1118 } 1119 1120 if (dev->bt_rfk) { 1121 rfkill_unregister(dev->bt_rfk); 1122 rfkill_destroy(dev->bt_rfk); 1123 } 1124 1125 if (dev->backlight_dev) 1126 backlight_device_unregister(dev->backlight_dev); 1127 1128 if (dev->illumination_supported) 1129 led_classdev_unregister(&dev->led_dev); 1130 1131 if (toshiba_acpi) 1132 toshiba_acpi = NULL; 1133 1134 kfree(dev); 1135 1136 return 0; 1137 } 1138 1139 static const char *find_hci_method(acpi_handle handle) 1140 { 1141 if (acpi_has_method(handle, "GHCI")) 1142 return "GHCI"; 1143 1144 if (acpi_has_method(handle, "SPFC")) 1145 return "SPFC"; 1146 1147 return NULL; 1148 } 1149 1150 static int toshiba_acpi_add(struct acpi_device *acpi_dev) 1151 { 1152 struct toshiba_acpi_dev *dev; 1153 const char *hci_method; 1154 u32 dummy; 1155 bool bt_present; 1156 int ret = 0; 1157 1158 if (toshiba_acpi) 1159 return -EBUSY; 1160 1161 pr_info("Toshiba Laptop ACPI Extras version %s\n", 1162 TOSHIBA_ACPI_VERSION); 1163 1164 hci_method = find_hci_method(acpi_dev->handle); 1165 if (!hci_method) { 1166 pr_err("HCI interface not found\n"); 1167 return -ENODEV; 1168 } 1169 1170 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1171 if (!dev) 1172 return -ENOMEM; 1173 dev->acpi_dev = acpi_dev; 1174 dev->method_hci = hci_method; 1175 acpi_dev->driver_data = dev; 1176 1177 if (toshiba_acpi_setup_keyboard(dev)) 1178 pr_info("Unable to activate hotkeys\n"); 1179 1180 mutex_init(&dev->mutex); 1181 1182 ret = toshiba_acpi_setup_backlight(dev); 1183 if (ret) 1184 goto error; 1185 1186 /* Register rfkill switch for Bluetooth */ 1187 if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) { 1188 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth", 1189 &acpi_dev->dev, 1190 RFKILL_TYPE_BLUETOOTH, 1191 &toshiba_rfk_ops, 1192 dev); 1193 if (!dev->bt_rfk) { 1194 pr_err("unable to allocate rfkill device\n"); 1195 ret = -ENOMEM; 1196 goto error; 1197 } 1198 1199 ret = rfkill_register(dev->bt_rfk); 1200 if (ret) { 1201 pr_err("unable to register rfkill device\n"); 1202 rfkill_destroy(dev->bt_rfk); 1203 goto error; 1204 } 1205 } 1206 1207 if (toshiba_illumination_available(dev)) { 1208 dev->led_dev.name = "toshiba::illumination"; 1209 dev->led_dev.max_brightness = 1; 1210 dev->led_dev.brightness_set = toshiba_illumination_set; 1211 dev->led_dev.brightness_get = toshiba_illumination_get; 1212 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev)) 1213 dev->illumination_supported = 1; 1214 } 1215 1216 /* Determine whether or not BIOS supports fan and video interfaces */ 1217 1218 ret = get_video_status(dev, &dummy); 1219 dev->video_supported = !ret; 1220 1221 ret = get_fan_status(dev, &dummy); 1222 dev->fan_supported = !ret; 1223 1224 create_toshiba_proc_entries(dev); 1225 1226 toshiba_acpi = dev; 1227 1228 return 0; 1229 1230 error: 1231 toshiba_acpi_remove(acpi_dev); 1232 return ret; 1233 } 1234 1235 static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event) 1236 { 1237 struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); 1238 u32 hci_result, value; 1239 int retries = 3; 1240 int scancode; 1241 1242 if (event != 0x80) 1243 return; 1244 1245 if (dev->info_supported) { 1246 scancode = toshiba_acpi_query_hotkey(dev); 1247 if (scancode < 0) 1248 pr_err("Failed to query hotkey event\n"); 1249 else if (scancode != 0) 1250 toshiba_acpi_report_hotkey(dev, scancode); 1251 } else if (dev->system_event_supported) { 1252 do { 1253 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result); 1254 switch (hci_result) { 1255 case HCI_SUCCESS: 1256 toshiba_acpi_report_hotkey(dev, (int)value); 1257 break; 1258 case HCI_NOT_SUPPORTED: 1259 /* 1260 * This is a workaround for an unresolved 1261 * issue on some machines where system events 1262 * sporadically become disabled. 1263 */ 1264 hci_write1(dev, HCI_SYSTEM_EVENT, 1, 1265 &hci_result); 1266 pr_notice("Re-enabled hotkeys\n"); 1267 /* fall through */ 1268 default: 1269 retries--; 1270 break; 1271 } 1272 } while (retries && hci_result != HCI_EMPTY); 1273 } 1274 } 1275 1276 #ifdef CONFIG_PM_SLEEP 1277 static int toshiba_acpi_suspend(struct device *device) 1278 { 1279 struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device)); 1280 u32 result; 1281 1282 if (dev->hotkey_dev) 1283 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result); 1284 1285 return 0; 1286 } 1287 1288 static int toshiba_acpi_resume(struct device *device) 1289 { 1290 struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device)); 1291 u32 result; 1292 1293 if (dev->hotkey_dev) 1294 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result); 1295 1296 return 0; 1297 } 1298 #endif 1299 1300 static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm, 1301 toshiba_acpi_suspend, toshiba_acpi_resume); 1302 1303 static struct acpi_driver toshiba_acpi_driver = { 1304 .name = "Toshiba ACPI driver", 1305 .owner = THIS_MODULE, 1306 .ids = toshiba_device_ids, 1307 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1308 .ops = { 1309 .add = toshiba_acpi_add, 1310 .remove = toshiba_acpi_remove, 1311 .notify = toshiba_acpi_notify, 1312 }, 1313 .drv.pm = &toshiba_acpi_pm, 1314 }; 1315 1316 static int __init toshiba_acpi_init(void) 1317 { 1318 int ret; 1319 1320 /* 1321 * Machines with this WMI guid aren't supported due to bugs in 1322 * their AML. This check relies on wmi initializing before 1323 * toshiba_acpi to guarantee guids have been identified. 1324 */ 1325 if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID)) 1326 return -ENODEV; 1327 1328 toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); 1329 if (!toshiba_proc_dir) { 1330 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n"); 1331 return -ENODEV; 1332 } 1333 1334 ret = acpi_bus_register_driver(&toshiba_acpi_driver); 1335 if (ret) { 1336 pr_err("Failed to register ACPI driver: %d\n", ret); 1337 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 1338 } 1339 1340 return ret; 1341 } 1342 1343 static void __exit toshiba_acpi_exit(void) 1344 { 1345 acpi_bus_unregister_driver(&toshiba_acpi_driver); 1346 if (toshiba_proc_dir) 1347 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 1348 } 1349 1350 module_init(toshiba_acpi_init); 1351 module_exit(toshiba_acpi_exit); 1352