toshiba_acpi.c revision a540d6b5b577f5a320d873a9cc8778ff20bf5ddf
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 int illumination_installed; 117 int force_fan; 118 int last_key_event; 119 int key_event_valid; 120 121 struct mutex mutex; 122}; 123 124static const struct acpi_device_id toshiba_device_ids[] = { 125 {"TOS6200", 0}, 126 {"TOS6208", 0}, 127 {"TOS1900", 0}, 128 {"", 0}, 129}; 130MODULE_DEVICE_TABLE(acpi, toshiba_device_ids); 131 132static const struct key_entry toshiba_acpi_keymap[] __devinitconst = { 133 { KE_KEY, 0x101, { KEY_MUTE } }, 134 { KE_KEY, 0x102, { KEY_ZOOMOUT } }, 135 { KE_KEY, 0x103, { KEY_ZOOMIN } }, 136 { KE_KEY, 0x13b, { KEY_COFFEE } }, 137 { KE_KEY, 0x13c, { KEY_BATTERY } }, 138 { KE_KEY, 0x13d, { KEY_SLEEP } }, 139 { KE_KEY, 0x13e, { KEY_SUSPEND } }, 140 { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } }, 141 { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } }, 142 { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } }, 143 { KE_KEY, 0x142, { KEY_WLAN } }, 144 { KE_KEY, 0x143, { KEY_PROG1 } }, 145 { KE_KEY, 0x17f, { KEY_FN } }, 146 { KE_KEY, 0xb05, { KEY_PROG2 } }, 147 { KE_KEY, 0xb06, { KEY_WWW } }, 148 { KE_KEY, 0xb07, { KEY_MAIL } }, 149 { KE_KEY, 0xb30, { KEY_STOP } }, 150 { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } }, 151 { KE_KEY, 0xb32, { KEY_NEXTSONG } }, 152 { KE_KEY, 0xb33, { KEY_PLAYPAUSE } }, 153 { KE_KEY, 0xb5a, { KEY_MEDIA } }, 154 { KE_END, 0 }, 155}; 156 157/* utility 158 */ 159 160static __inline__ void _set_bit(u32 * word, u32 mask, int value) 161{ 162 *word = (*word & ~mask) | (mask * value); 163} 164 165/* acpi interface wrappers 166 */ 167 168static int write_acpi_int(const char *methodName, int val) 169{ 170 struct acpi_object_list params; 171 union acpi_object in_objs[1]; 172 acpi_status status; 173 174 params.count = ARRAY_SIZE(in_objs); 175 params.pointer = in_objs; 176 in_objs[0].type = ACPI_TYPE_INTEGER; 177 in_objs[0].integer.value = val; 178 179 status = acpi_evaluate_object(NULL, (char *)methodName, ¶ms, NULL); 180 return (status == AE_OK) ? 0 : -EIO; 181} 182 183/* Perform a raw HCI call. Here we don't care about input or output buffer 184 * format. 185 */ 186static acpi_status hci_raw(struct toshiba_acpi_dev *dev, 187 const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) 188{ 189 struct acpi_object_list params; 190 union acpi_object in_objs[HCI_WORDS]; 191 struct acpi_buffer results; 192 union acpi_object out_objs[HCI_WORDS + 1]; 193 acpi_status status; 194 int i; 195 196 params.count = HCI_WORDS; 197 params.pointer = in_objs; 198 for (i = 0; i < HCI_WORDS; ++i) { 199 in_objs[i].type = ACPI_TYPE_INTEGER; 200 in_objs[i].integer.value = in[i]; 201 } 202 203 results.length = sizeof(out_objs); 204 results.pointer = out_objs; 205 206 status = acpi_evaluate_object(dev->acpi_dev->handle, 207 (char *)dev->method_hci, ¶ms, 208 &results); 209 if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { 210 for (i = 0; i < out_objs->package.count; ++i) { 211 out[i] = out_objs->package.elements[i].integer.value; 212 } 213 } 214 215 return status; 216} 217 218/* common hci tasks (get or set one or two value) 219 * 220 * In addition to the ACPI status, the HCI system returns a result which 221 * may be useful (such as "not supported"). 222 */ 223 224static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg, 225 u32 in1, u32 *result) 226{ 227 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; 228 u32 out[HCI_WORDS]; 229 acpi_status status = hci_raw(dev, in, out); 230 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 231 return status; 232} 233 234static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg, 235 u32 *out1, u32 *result) 236{ 237 u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; 238 u32 out[HCI_WORDS]; 239 acpi_status status = hci_raw(dev, in, out); 240 *out1 = out[2]; 241 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 242 return status; 243} 244 245static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg, 246 u32 in1, u32 in2, u32 *result) 247{ 248 u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 }; 249 u32 out[HCI_WORDS]; 250 acpi_status status = hci_raw(dev, in, out); 251 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 252 return status; 253} 254 255static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg, 256 u32 *out1, u32 *out2, u32 *result) 257{ 258 u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 }; 259 u32 out[HCI_WORDS]; 260 acpi_status status = hci_raw(dev, in, out); 261 *out1 = out[2]; 262 *out2 = out[3]; 263 *result = (status == AE_OK) ? out[0] : HCI_FAILURE; 264 return status; 265} 266 267/* Illumination support */ 268static int toshiba_illumination_available(struct toshiba_acpi_dev *dev) 269{ 270 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 271 u32 out[HCI_WORDS]; 272 acpi_status status; 273 274 in[0] = 0xf100; 275 status = hci_raw(dev, in, out); 276 if (ACPI_FAILURE(status)) { 277 pr_info("Illumination device not available\n"); 278 return 0; 279 } 280 in[0] = 0xf400; 281 status = hci_raw(dev, in, out); 282 return 1; 283} 284 285static void toshiba_illumination_set(struct led_classdev *cdev, 286 enum led_brightness brightness) 287{ 288 struct toshiba_acpi_dev *dev = container_of(cdev, 289 struct toshiba_acpi_dev, led_dev); 290 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 291 u32 out[HCI_WORDS]; 292 acpi_status status; 293 294 /* First request : initialize communication. */ 295 in[0] = 0xf100; 296 status = hci_raw(dev, in, out); 297 if (ACPI_FAILURE(status)) { 298 pr_info("Illumination device not available\n"); 299 return; 300 } 301 302 if (brightness) { 303 /* Switch the illumination on */ 304 in[0] = 0xf400; 305 in[1] = 0x14e; 306 in[2] = 1; 307 status = hci_raw(dev, in, out); 308 if (ACPI_FAILURE(status)) { 309 pr_info("ACPI call for illumination failed\n"); 310 return; 311 } 312 } else { 313 /* Switch the illumination off */ 314 in[0] = 0xf400; 315 in[1] = 0x14e; 316 in[2] = 0; 317 status = hci_raw(dev, in, out); 318 if (ACPI_FAILURE(status)) { 319 pr_info("ACPI call for illumination failed.\n"); 320 return; 321 } 322 } 323 324 /* Last request : close communication. */ 325 in[0] = 0xf200; 326 in[1] = 0; 327 in[2] = 0; 328 hci_raw(dev, in, out); 329} 330 331static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev) 332{ 333 struct toshiba_acpi_dev *dev = container_of(cdev, 334 struct toshiba_acpi_dev, led_dev); 335 u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; 336 u32 out[HCI_WORDS]; 337 acpi_status status; 338 enum led_brightness result; 339 340 /* First request : initialize communication. */ 341 in[0] = 0xf100; 342 status = hci_raw(dev, in, out); 343 if (ACPI_FAILURE(status)) { 344 pr_info("Illumination device not available\n"); 345 return LED_OFF; 346 } 347 348 /* Check the illumination */ 349 in[0] = 0xf300; 350 in[1] = 0x14e; 351 status = hci_raw(dev, in, out); 352 if (ACPI_FAILURE(status)) { 353 pr_info("ACPI call for illumination failed.\n"); 354 return LED_OFF; 355 } 356 357 result = out[2] ? LED_FULL : LED_OFF; 358 359 /* Last request : close communication. */ 360 in[0] = 0xf200; 361 in[1] = 0; 362 in[2] = 0; 363 hci_raw(dev, in, out); 364 365 return result; 366} 367 368/* Bluetooth rfkill handlers */ 369 370static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present) 371{ 372 u32 hci_result; 373 u32 value, value2; 374 375 value = 0; 376 value2 = 0; 377 hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result); 378 if (hci_result == HCI_SUCCESS) 379 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false; 380 381 return hci_result; 382} 383 384static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state) 385{ 386 u32 hci_result; 387 u32 value, value2; 388 389 value = 0; 390 value2 = 0x0001; 391 hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result); 392 393 *radio_state = value & HCI_WIRELESS_KILL_SWITCH; 394 return hci_result; 395} 396 397static int bt_rfkill_set_block(void *data, bool blocked) 398{ 399 struct toshiba_acpi_dev *dev = data; 400 u32 result1, result2; 401 u32 value; 402 int err; 403 bool radio_state; 404 405 value = (blocked == false); 406 407 mutex_lock(&dev->mutex); 408 if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) { 409 err = -EIO; 410 goto out; 411 } 412 413 if (!radio_state) { 414 err = 0; 415 goto out; 416 } 417 418 hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1); 419 hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2); 420 421 if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS) 422 err = -EIO; 423 else 424 err = 0; 425 out: 426 mutex_unlock(&dev->mutex); 427 return err; 428} 429 430static void bt_rfkill_poll(struct rfkill *rfkill, void *data) 431{ 432 bool new_rfk_state; 433 bool value; 434 u32 hci_result; 435 struct toshiba_acpi_dev *dev = data; 436 437 mutex_lock(&dev->mutex); 438 439 hci_result = hci_get_radio_state(dev, &value); 440 if (hci_result != HCI_SUCCESS) { 441 /* Can't do anything useful */ 442 mutex_unlock(&dev->mutex); 443 return; 444 } 445 446 new_rfk_state = value; 447 448 mutex_unlock(&dev->mutex); 449 450 if (rfkill_set_hw_state(rfkill, !new_rfk_state)) 451 bt_rfkill_set_block(data, true); 452} 453 454static const struct rfkill_ops toshiba_rfk_ops = { 455 .set_block = bt_rfkill_set_block, 456 .poll = bt_rfkill_poll, 457}; 458 459static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; 460 461static int get_lcd(struct backlight_device *bd) 462{ 463 struct toshiba_acpi_dev *dev = bl_get_data(bd); 464 u32 hci_result; 465 u32 value; 466 467 hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result); 468 if (hci_result == HCI_SUCCESS) 469 return (value >> HCI_LCD_BRIGHTNESS_SHIFT); 470 471 return -EIO; 472} 473 474static int lcd_proc_show(struct seq_file *m, void *v) 475{ 476 struct toshiba_acpi_dev *dev = m->private; 477 int value; 478 479 if (!dev->backlight_dev) 480 return -ENODEV; 481 482 value = get_lcd(dev->backlight_dev); 483 if (value >= 0) { 484 seq_printf(m, "brightness: %d\n", value); 485 seq_printf(m, "brightness_levels: %d\n", 486 HCI_LCD_BRIGHTNESS_LEVELS); 487 return 0; 488 } 489 490 pr_err("Error reading LCD brightness\n"); 491 return -EIO; 492} 493 494static int lcd_proc_open(struct inode *inode, struct file *file) 495{ 496 return single_open(file, lcd_proc_show, PDE(inode)->data); 497} 498 499static int set_lcd(struct toshiba_acpi_dev *dev, int value) 500{ 501 u32 hci_result; 502 503 value = value << HCI_LCD_BRIGHTNESS_SHIFT; 504 hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result); 505 return hci_result == HCI_SUCCESS ? 0 : -EIO; 506} 507 508static int set_lcd_status(struct backlight_device *bd) 509{ 510 struct toshiba_acpi_dev *dev = bl_get_data(bd); 511 return set_lcd(dev, bd->props.brightness); 512} 513 514static ssize_t lcd_proc_write(struct file *file, const char __user *buf, 515 size_t count, loff_t *pos) 516{ 517 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 518 char cmd[42]; 519 size_t len; 520 int value; 521 int ret; 522 523 len = min(count, sizeof(cmd) - 1); 524 if (copy_from_user(cmd, buf, len)) 525 return -EFAULT; 526 cmd[len] = '\0'; 527 528 if (sscanf(cmd, " brightness : %i", &value) == 1 && 529 value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { 530 ret = set_lcd(dev, value); 531 if (ret == 0) 532 ret = count; 533 } else { 534 ret = -EINVAL; 535 } 536 return ret; 537} 538 539static const struct file_operations lcd_proc_fops = { 540 .owner = THIS_MODULE, 541 .open = lcd_proc_open, 542 .read = seq_read, 543 .llseek = seq_lseek, 544 .release = single_release, 545 .write = lcd_proc_write, 546}; 547 548static int video_proc_show(struct seq_file *m, void *v) 549{ 550 struct toshiba_acpi_dev *dev = m->private; 551 u32 hci_result; 552 u32 value; 553 554 hci_read1(dev, HCI_VIDEO_OUT, &value, &hci_result); 555 if (hci_result == HCI_SUCCESS) { 556 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; 557 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; 558 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; 559 seq_printf(m, "lcd_out: %d\n", is_lcd); 560 seq_printf(m, "crt_out: %d\n", is_crt); 561 seq_printf(m, "tv_out: %d\n", is_tv); 562 return 0; 563 } 564 565 return -EIO; 566} 567 568static int video_proc_open(struct inode *inode, struct file *file) 569{ 570 return single_open(file, video_proc_show, PDE(inode)->data); 571} 572 573static ssize_t video_proc_write(struct file *file, const char __user *buf, 574 size_t count, loff_t *pos) 575{ 576 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 577 char *cmd, *buffer; 578 int ret = 0; 579 int value; 580 int remain = count; 581 int lcd_out = -1; 582 int crt_out = -1; 583 int tv_out = -1; 584 u32 hci_result; 585 u32 video_out; 586 587 cmd = kmalloc(count + 1, GFP_KERNEL); 588 if (!cmd) 589 return -ENOMEM; 590 if (copy_from_user(cmd, buf, count)) { 591 kfree(cmd); 592 return -EFAULT; 593 } 594 cmd[count] = '\0'; 595 596 buffer = cmd; 597 598 /* scan expression. Multiple expressions may be delimited with ; 599 * 600 * NOTE: to keep scanning simple, invalid fields are ignored 601 */ 602 while (remain) { 603 if (sscanf(buffer, " lcd_out : %i", &value) == 1) 604 lcd_out = value & 1; 605 else if (sscanf(buffer, " crt_out : %i", &value) == 1) 606 crt_out = value & 1; 607 else if (sscanf(buffer, " tv_out : %i", &value) == 1) 608 tv_out = value & 1; 609 /* advance to one character past the next ; */ 610 do { 611 ++buffer; 612 --remain; 613 } 614 while (remain && *(buffer - 1) != ';'); 615 } 616 617 kfree(cmd); 618 619 hci_read1(dev, HCI_VIDEO_OUT, &video_out, &hci_result); 620 if (hci_result == HCI_SUCCESS) { 621 unsigned int new_video_out = video_out; 622 if (lcd_out != -1) 623 _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); 624 if (crt_out != -1) 625 _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); 626 if (tv_out != -1) 627 _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); 628 /* To avoid unnecessary video disruption, only write the new 629 * video setting if something changed. */ 630 if (new_video_out != video_out) 631 ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out); 632 } else { 633 ret = -EIO; 634 } 635 636 return ret ? ret : count; 637} 638 639static const struct file_operations video_proc_fops = { 640 .owner = THIS_MODULE, 641 .open = video_proc_open, 642 .read = seq_read, 643 .llseek = seq_lseek, 644 .release = single_release, 645 .write = video_proc_write, 646}; 647 648static int fan_proc_show(struct seq_file *m, void *v) 649{ 650 struct toshiba_acpi_dev *dev = m->private; 651 u32 hci_result; 652 u32 value; 653 654 hci_read1(dev, HCI_FAN, &value, &hci_result); 655 if (hci_result == HCI_SUCCESS) { 656 seq_printf(m, "running: %d\n", (value > 0)); 657 seq_printf(m, "force_on: %d\n", dev->force_fan); 658 return 0; 659 } 660 661 return -EIO; 662} 663 664static int fan_proc_open(struct inode *inode, struct file *file) 665{ 666 return single_open(file, fan_proc_show, PDE(inode)->data); 667} 668 669static ssize_t fan_proc_write(struct file *file, const char __user *buf, 670 size_t count, loff_t *pos) 671{ 672 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 673 char cmd[42]; 674 size_t len; 675 int value; 676 u32 hci_result; 677 678 len = min(count, sizeof(cmd) - 1); 679 if (copy_from_user(cmd, buf, len)) 680 return -EFAULT; 681 cmd[len] = '\0'; 682 683 if (sscanf(cmd, " force_on : %i", &value) == 1 && 684 value >= 0 && value <= 1) { 685 hci_write1(dev, HCI_FAN, value, &hci_result); 686 if (hci_result != HCI_SUCCESS) 687 return -EIO; 688 else 689 dev->force_fan = value; 690 } else { 691 return -EINVAL; 692 } 693 694 return count; 695} 696 697static const struct file_operations fan_proc_fops = { 698 .owner = THIS_MODULE, 699 .open = fan_proc_open, 700 .read = seq_read, 701 .llseek = seq_lseek, 702 .release = single_release, 703 .write = fan_proc_write, 704}; 705 706static int keys_proc_show(struct seq_file *m, void *v) 707{ 708 struct toshiba_acpi_dev *dev = m->private; 709 u32 hci_result; 710 u32 value; 711 712 if (!dev->key_event_valid) { 713 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result); 714 if (hci_result == HCI_SUCCESS) { 715 dev->key_event_valid = 1; 716 dev->last_key_event = value; 717 } else if (hci_result == HCI_EMPTY) { 718 /* better luck next time */ 719 } else if (hci_result == HCI_NOT_SUPPORTED) { 720 /* This is a workaround for an unresolved issue on 721 * some machines where system events sporadically 722 * become disabled. */ 723 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 724 pr_notice("Re-enabled hotkeys\n"); 725 } else { 726 pr_err("Error reading hotkey status\n"); 727 return -EIO; 728 } 729 } 730 731 seq_printf(m, "hotkey_ready: %d\n", dev->key_event_valid); 732 seq_printf(m, "hotkey: 0x%04x\n", dev->last_key_event); 733 return 0; 734} 735 736static int keys_proc_open(struct inode *inode, struct file *file) 737{ 738 return single_open(file, keys_proc_show, PDE(inode)->data); 739} 740 741static ssize_t keys_proc_write(struct file *file, const char __user *buf, 742 size_t count, loff_t *pos) 743{ 744 struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data; 745 char cmd[42]; 746 size_t len; 747 int value; 748 749 len = min(count, sizeof(cmd) - 1); 750 if (copy_from_user(cmd, buf, len)) 751 return -EFAULT; 752 cmd[len] = '\0'; 753 754 if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) { 755 dev->key_event_valid = 0; 756 } else { 757 return -EINVAL; 758 } 759 760 return count; 761} 762 763static const struct file_operations keys_proc_fops = { 764 .owner = THIS_MODULE, 765 .open = keys_proc_open, 766 .read = seq_read, 767 .llseek = seq_lseek, 768 .release = single_release, 769 .write = keys_proc_write, 770}; 771 772static int version_proc_show(struct seq_file *m, void *v) 773{ 774 seq_printf(m, "driver: %s\n", TOSHIBA_ACPI_VERSION); 775 seq_printf(m, "proc_interface: %d\n", PROC_INTERFACE_VERSION); 776 return 0; 777} 778 779static int version_proc_open(struct inode *inode, struct file *file) 780{ 781 return single_open(file, version_proc_show, PDE(inode)->data); 782} 783 784static const struct file_operations version_proc_fops = { 785 .owner = THIS_MODULE, 786 .open = version_proc_open, 787 .read = seq_read, 788 .llseek = seq_lseek, 789 .release = single_release, 790}; 791 792/* proc and module init 793 */ 794 795#define PROC_TOSHIBA "toshiba" 796 797static void __devinit 798create_toshiba_proc_entries(struct toshiba_acpi_dev *dev) 799{ 800 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, 801 &lcd_proc_fops, dev); 802 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, 803 &video_proc_fops, dev); 804 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, 805 &fan_proc_fops, dev); 806 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, 807 &keys_proc_fops, dev); 808 proc_create_data("version", S_IRUGO, toshiba_proc_dir, 809 &version_proc_fops, dev); 810} 811 812static void remove_toshiba_proc_entries(void) 813{ 814 remove_proc_entry("lcd", toshiba_proc_dir); 815 remove_proc_entry("video", toshiba_proc_dir); 816 remove_proc_entry("fan", toshiba_proc_dir); 817 remove_proc_entry("keys", toshiba_proc_dir); 818 remove_proc_entry("version", toshiba_proc_dir); 819} 820 821static const struct backlight_ops toshiba_backlight_data = { 822 .get_brightness = get_lcd, 823 .update_status = set_lcd_status, 824}; 825 826static int __devinit toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev) 827{ 828 acpi_status status; 829 int error; 830 831 dev->hotkey_dev = input_allocate_device(); 832 if (!dev->hotkey_dev) { 833 pr_info("Unable to register input device\n"); 834 return -ENOMEM; 835 } 836 837 dev->hotkey_dev->name = "Toshiba input device"; 838 dev->hotkey_dev->phys = "toshiba_acpi/input0"; 839 dev->hotkey_dev->id.bustype = BUS_HOST; 840 841 error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL); 842 if (error) 843 goto err_free_dev; 844 845 status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL); 846 if (ACPI_FAILURE(status)) { 847 pr_info("Unable to enable hotkeys\n"); 848 error = -ENODEV; 849 goto err_free_keymap; 850 } 851 852 error = input_register_device(dev->hotkey_dev); 853 if (error) { 854 pr_info("Unable to register input device\n"); 855 goto err_free_keymap; 856 } 857 858 return 0; 859 860 err_free_keymap: 861 sparse_keymap_free(dev->hotkey_dev); 862 err_free_dev: 863 input_free_device(dev->hotkey_dev); 864 dev->hotkey_dev = NULL; 865 return error; 866} 867 868static int toshiba_acpi_remove(struct acpi_device *acpi_dev, int type) 869{ 870 struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); 871 872 remove_toshiba_proc_entries(); 873 874 if (dev->hotkey_dev) { 875 input_unregister_device(dev->hotkey_dev); 876 sparse_keymap_free(dev->hotkey_dev); 877 } 878 879 if (dev->bt_rfk) { 880 rfkill_unregister(dev->bt_rfk); 881 rfkill_destroy(dev->bt_rfk); 882 } 883 884 if (dev->backlight_dev) 885 backlight_device_unregister(dev->backlight_dev); 886 887 if (dev->illumination_installed) 888 led_classdev_unregister(&dev->led_dev); 889 890 kfree(dev); 891 892 return 0; 893} 894 895static const char * __devinit find_hci_method(acpi_handle handle) 896{ 897 acpi_status status; 898 acpi_handle hci_handle; 899 900 status = acpi_get_handle(handle, "GHCI", &hci_handle); 901 if (ACPI_SUCCESS(status)) 902 return "GHCI"; 903 904 status = acpi_get_handle(handle, "SPFC", &hci_handle); 905 if (ACPI_SUCCESS(status)) 906 return "SPFC"; 907 908 return NULL; 909} 910 911static int __devinit toshiba_acpi_add(struct acpi_device *acpi_dev) 912{ 913 struct toshiba_acpi_dev *dev; 914 const char *hci_method; 915 u32 hci_result; 916 bool bt_present; 917 int ret = 0; 918 struct backlight_properties props; 919 920 pr_info("Toshiba Laptop ACPI Extras version %s\n", 921 TOSHIBA_ACPI_VERSION); 922 923 hci_method = find_hci_method(acpi_dev->handle); 924 if (!hci_method) { 925 pr_err("HCI interface not found\n"); 926 return -ENODEV; 927 } 928 929 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 930 if (!dev) 931 return -ENOMEM; 932 dev->acpi_dev = acpi_dev; 933 dev->method_hci = hci_method; 934 acpi_dev->driver_data = dev; 935 936 if (toshiba_acpi_setup_keyboard(dev)) 937 pr_info("Unable to activate hotkeys\n"); 938 939 mutex_init(&dev->mutex); 940 941 /* enable event fifo */ 942 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 943 944 create_toshiba_proc_entries(dev); 945 946 props.type = BACKLIGHT_PLATFORM; 947 props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; 948 dev->backlight_dev = backlight_device_register("toshiba", 949 &acpi_dev->dev, 950 dev, 951 &toshiba_backlight_data, 952 &props); 953 if (IS_ERR(dev->backlight_dev)) { 954 ret = PTR_ERR(dev->backlight_dev); 955 956 pr_err("Could not register toshiba backlight device\n"); 957 dev->backlight_dev = NULL; 958 goto error; 959 } 960 961 /* Register rfkill switch for Bluetooth */ 962 if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) { 963 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth", 964 &acpi_dev->dev, 965 RFKILL_TYPE_BLUETOOTH, 966 &toshiba_rfk_ops, 967 dev); 968 if (!dev->bt_rfk) { 969 pr_err("unable to allocate rfkill device\n"); 970 ret = -ENOMEM; 971 goto error; 972 } 973 974 ret = rfkill_register(dev->bt_rfk); 975 if (ret) { 976 pr_err("unable to register rfkill device\n"); 977 rfkill_destroy(dev->bt_rfk); 978 goto error; 979 } 980 } 981 982 if (toshiba_illumination_available(dev)) { 983 dev->led_dev.name = "toshiba::illumination"; 984 dev->led_dev.max_brightness = 1; 985 dev->led_dev.brightness_set = toshiba_illumination_set; 986 dev->led_dev.brightness_get = toshiba_illumination_get; 987 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev)) 988 dev->illumination_installed = 1; 989 } 990 991 return 0; 992 993error: 994 toshiba_acpi_remove(acpi_dev, 0); 995 return ret; 996} 997 998static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event) 999{ 1000 struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); 1001 u32 hci_result, value; 1002 1003 if (event != 0x80) 1004 return; 1005 do { 1006 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result); 1007 if (hci_result == HCI_SUCCESS) { 1008 if (value == 0x100) 1009 continue; 1010 /* act on key press; ignore key release */ 1011 if (value & 0x80) 1012 continue; 1013 1014 if (!sparse_keymap_report_event(dev->hotkey_dev, 1015 value, 1, true)) { 1016 pr_info("Unknown key %x\n", 1017 value); 1018 } 1019 } else if (hci_result == HCI_NOT_SUPPORTED) { 1020 /* This is a workaround for an unresolved issue on 1021 * some machines where system events sporadically 1022 * become disabled. */ 1023 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result); 1024 pr_notice("Re-enabled hotkeys\n"); 1025 } 1026 } while (hci_result != HCI_EMPTY); 1027} 1028 1029 1030static struct acpi_driver toshiba_acpi_driver = { 1031 .name = "Toshiba ACPI driver", 1032 .owner = THIS_MODULE, 1033 .ids = toshiba_device_ids, 1034 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1035 .ops = { 1036 .add = toshiba_acpi_add, 1037 .remove = toshiba_acpi_remove, 1038 .notify = toshiba_acpi_notify, 1039 }, 1040}; 1041 1042static int __init toshiba_acpi_init(void) 1043{ 1044 int ret; 1045 1046 toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); 1047 if (!toshiba_proc_dir) { 1048 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n"); 1049 return -ENODEV; 1050 } 1051 1052 ret = acpi_bus_register_driver(&toshiba_acpi_driver); 1053 if (ret) { 1054 pr_err("Failed to register ACPI driver: %d\n", ret); 1055 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 1056 } 1057 1058 return ret; 1059} 1060 1061static void __exit toshiba_acpi_exit(void) 1062{ 1063 acpi_bus_unregister_driver(&toshiba_acpi_driver); 1064 if (toshiba_proc_dir) 1065 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); 1066} 1067 1068module_init(toshiba_acpi_init); 1069module_exit(toshiba_acpi_exit); 1070