drivers/platform/x86/toshiba_acpi.c

   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/platform_device.h>
  51 #include <linux/rfkill.h>
  52 #include <linux/input.h>
  53 #include <linux/input/sparse-keymap.h>
  54 #include <linux/leds.h>
  55 #include <linux/slab.h>
  56
  57 #include <asm/uaccess.h>
  58
  59 #include <acpi/acpi_drivers.h>
  60
  61 MODULE_AUTHOR("John Belmonte");
  62 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  63 MODULE_LICENSE("GPL");
  64
  65 /* Toshiba ACPI method paths */
  66 #define METHOD_LCD_BRIGHTNESS   "\\_SB_.PCI0.VGA_.LCD_._BCM"
  67 #define TOSH_INTERFACE_1        "\\_SB_.VALD"
  68 #define TOSH_INTERFACE_2        "\\_SB_.VALZ"
  69 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  70 #define GHCI_METHOD             ".GHCI"
  71
  72 /* Toshiba HCI interface definitions
  73  *
  74  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  75  * be uniform across all their models.  Ideally we would just call
  76  * dedicated ACPI methods instead of using this primitive interface.
  77  * However the ACPI methods seem to be incomplete in some areas (for
  78  * example they allow setting, but not reading, the LCD brightness value),
  79  * so this is still useful.
  80  */
  81
  82 #define HCI_WORDS                       6
  83
  84 /* operations */
  85 #define HCI_SET                         0xff00
  86 #define HCI_GET                         0xfe00
  87
  88 /* return codes */
  89 #define HCI_SUCCESS                     0x0000
  90 #define HCI_FAILURE                     0x1000
  91 #define HCI_NOT_SUPPORTED               0x8000
  92 #define HCI_EMPTY                       0x8c00
  93
  94 /* registers */
  95 #define HCI_FAN                         0x0004
  96 #define HCI_SYSTEM_EVENT                0x0016
  97 #define HCI_VIDEO_OUT                   0x001c
  98 #define HCI_HOTKEY_EVENT                0x001e
  99 #define HCI_LCD_BRIGHTNESS              0x002a
 100 #define HCI_WIRELESS                    0x0056
 101
 102 /* field definitions */
 103 #define HCI_LCD_BRIGHTNESS_BITS         3
 104 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 105 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 106 #define HCI_VIDEO_OUT_LCD               0x1
 107 #define HCI_VIDEO_OUT_CRT               0x2
 108 #define HCI_VIDEO_OUT_TV                0x4
 109 #define HCI_WIRELESS_KILL_SWITCH        0x01
 110 #define HCI_WIRELESS_BT_PRESENT         0x0f
 111 #define HCI_WIRELESS_BT_ATTACH          0x40
 112 #define HCI_WIRELESS_BT_POWER           0x80
 113
 114 static const struct acpi_device_id toshiba_device_ids[] = {
 115         {"TOS6200", 0},
 116         {"TOS6208", 0},
 117         {"TOS1900", 0},
 118         {"", 0},
 119 };
 120 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 121
 122 static const struct key_entry toshiba_acpi_keymap[] __initconst = {
 123         { KE_KEY, 0x101, { KEY_MUTE } },
 124         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 125         { KE_KEY, 0x103, { KEY_ZOOMIN } },
 126         { KE_KEY, 0x13b, { KEY_COFFEE } },
 127         { KE_KEY, 0x13c, { KEY_BATTERY } },
 128         { KE_KEY, 0x13d, { KEY_SLEEP } },
 129         { KE_KEY, 0x13e, { KEY_SUSPEND } },
 130         { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
 131         { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
 132         { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
 133         { KE_KEY, 0x142, { KEY_WLAN } },
 134         { KE_KEY, 0x143, { KEY_PROG1 } },
 135         { KE_KEY, 0x17f, { KEY_FN } },
 136         { KE_KEY, 0xb05, { KEY_PROG2 } },
 137         { KE_KEY, 0xb06, { KEY_WWW } },
 138         { KE_KEY, 0xb07, { KEY_MAIL } },
 139         { KE_KEY, 0xb30, { KEY_STOP } },
 140         { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
 141         { KE_KEY, 0xb32, { KEY_NEXTSONG } },
 142         { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
 143         { KE_KEY, 0xb5a, { KEY_MEDIA } },
 144         { KE_END, 0 },
 145 };
 146
 147 /* utility
 148  */
 149
 150 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 151 {
 152         *word = (*word & ~mask) | (mask * value);
 153 }
 154
 155 /* acpi interface wrappers
 156  */
 157
 158 static int is_valid_acpi_path(const char *methodName)
 159 {
 160         acpi_handle handle;
 161         acpi_status status;
 162
 163         status = acpi_get_handle(NULL, (char *)methodName, &handle);
 164         return !ACPI_FAILURE(status);
 165 }
 166
 167 static int write_acpi_int(const char *methodName, int val)
 168 {
 169         struct acpi_object_list params;
 170         union acpi_object in_objs[1];
 171         acpi_status status;
 172
 173         params.count = ARRAY_SIZE(in_objs);
 174         params.pointer = in_objs;
 175         in_objs[0].type = ACPI_TYPE_INTEGER;
 176         in_objs[0].integer.value = val;
 177
 178         status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
 179         return (status == AE_OK);
 180 }
 181
 182 #if 0
 183 static int read_acpi_int(const char *methodName, int *pVal)
 184 {
 185         struct acpi_buffer results;
 186         union acpi_object out_objs[1];
 187         acpi_status status;
 188
 189         results.length = sizeof(out_objs);
 190         results.pointer = out_objs;
 191
 192         status = acpi_evaluate_object(0, (char *)methodName, 0, &results);
 193         *pVal = out_objs[0].integer.value;
 194
 195         return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER);
 196 }
 197 #endif
 198
 199 static const char *method_hci /*= 0*/ ;
 200
 201 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 202  * format.
 203  */
 204 static acpi_status hci_raw(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(NULL, (char *)method_hci, &params,
 224                                       &results);
 225         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 226                 for (i = 0; i < out_objs->package.count; ++i) {
 227                         out[i] = out_objs->package.elements[i].integer.value;
 228                 }
 229         }
 230
 231         return status;
 232 }
 233
 234 /* common hci tasks (get or set one or two value)
 235  *
 236  * In addition to the ACPI status, the HCI system returns a result which
 237  * may be useful (such as "not supported").
 238  */
 239
 240 static acpi_status hci_write1(u32 reg, u32 in1, u32 * result)
 241 {
 242         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 243         u32 out[HCI_WORDS];
 244         acpi_status status = hci_raw(in, out);
 245         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 246         return status;
 247 }
 248
 249 static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result)
 250 {
 251         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 252         u32 out[HCI_WORDS];
 253         acpi_status status = hci_raw(in, out);
 254         *out1 = out[2];
 255         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 256         return status;
 257 }
 258
 259 static acpi_status hci_write2(u32 reg, u32 in1, u32 in2, u32 *result)
 260 {
 261         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 262         u32 out[HCI_WORDS];
 263         acpi_status status = hci_raw(in, out);
 264         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 265         return status;
 266 }
 267
 268 static acpi_status hci_read2(u32 reg, u32 *out1, u32 *out2, u32 *result)
 269 {
 270         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 271         u32 out[HCI_WORDS];
 272         acpi_status status = hci_raw(in, out);
 273         *out1 = out[2];
 274         *out2 = out[3];
 275         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 276         return status;
 277 }
 278
 279 struct toshiba_acpi_dev {
 280         struct platform_device *p_dev;
 281         struct rfkill *bt_rfk;
 282         struct input_dev *hotkey_dev;
 283         int illumination_installed;
 284         acpi_handle handle;
 285
 286         const char *bt_name;
 287
 288         struct mutex mutex;
 289 };
 290
 291 /* Illumination support */
 292 static int toshiba_illumination_available(void)
 293 {
 294         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 295         u32 out[HCI_WORDS];
 296         acpi_status status;
 297
 298         in[0] = 0xf100;
 299         status = hci_raw(in, out);
 300         if (ACPI_FAILURE(status)) {
 301                 pr_info("Illumination device not available\n");
 302                 return 0;
 303         }
 304         in[0] = 0xf400;
 305         status = hci_raw(in, out);
 306         return 1;
 307 }
 308
 309 static void toshiba_illumination_set(struct led_classdev *cdev,
 310                                      enum led_brightness brightness)
 311 {
 312         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 313         u32 out[HCI_WORDS];
 314         acpi_status status;
 315
 316         /* First request : initialize communication. */
 317         in[0] = 0xf100;
 318         status = hci_raw(in, out);
 319         if (ACPI_FAILURE(status)) {
 320                 pr_info("Illumination device not available\n");
 321                 return;
 322         }
 323
 324         if (brightness) {
 325                 /* Switch the illumination on */
 326                 in[0] = 0xf400;
 327                 in[1] = 0x14e;
 328                 in[2] = 1;
 329                 status = hci_raw(in, out);
 330                 if (ACPI_FAILURE(status)) {
 331                         pr_info("ACPI call for illumination failed\n");
 332                         return;
 333                 }
 334         } else {
 335                 /* Switch the illumination off */
 336                 in[0] = 0xf400;
 337                 in[1] = 0x14e;
 338                 in[2] = 0;
 339                 status = hci_raw(in, out);
 340                 if (ACPI_FAILURE(status)) {
 341                         pr_info("ACPI call for illumination failed.\n");
 342                         return;
 343                 }
 344         }
 345
 346         /* Last request : close communication. */
 347         in[0] = 0xf200;
 348         in[1] = 0;
 349         in[2] = 0;
 350         hci_raw(in, out);
 351 }
 352
 353 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
 354 {
 355         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 356         u32 out[HCI_WORDS];
 357         acpi_status status;
 358         enum led_brightness result;
 359
 360         /* First request : initialize communication. */
 361         in[0] = 0xf100;
 362         status = hci_raw(in, out);
 363         if (ACPI_FAILURE(status)) {
 364                 pr_info("Illumination device not available\n");
 365                 return LED_OFF;
 366         }
 367
 368         /* Check the illumination */
 369         in[0] = 0xf300;
 370         in[1] = 0x14e;
 371         status = hci_raw(in, out);
 372         if (ACPI_FAILURE(status)) {
 373                 pr_info("ACPI call for illumination failed.\n");
 374                 return LED_OFF;
 375         }
 376
 377         result = out[2] ? LED_FULL : LED_OFF;
 378
 379         /* Last request : close communication. */
 380         in[0] = 0xf200;
 381         in[1] = 0;
 382         in[2] = 0;
 383         hci_raw(in, out);
 384
 385         return result;
 386 }
 387
 388 static struct led_classdev toshiba_led = {
 389         .name           = "toshiba::illumination",
 390         .max_brightness = 1,
 391         .brightness_set = toshiba_illumination_set,
 392         .brightness_get = toshiba_illumination_get,
 393 };
 394
 395 static struct toshiba_acpi_dev toshiba_acpi = {
 396         .bt_name = "Toshiba Bluetooth",
 397 };
 398
 399 /* Bluetooth rfkill handlers */
 400
 401 static u32 hci_get_bt_present(bool *present)
 402 {
 403         u32 hci_result;
 404         u32 value, value2;
 405
 406         value = 0;
 407         value2 = 0;
 408         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 409         if (hci_result == HCI_SUCCESS)
 410                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 411
 412         return hci_result;
 413 }
 414
 415 static u32 hci_get_radio_state(bool *radio_state)
 416 {
 417         u32 hci_result;
 418         u32 value, value2;
 419
 420         value = 0;
 421         value2 = 0x0001;
 422         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 423
 424         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 425         return hci_result;
 426 }
 427
 428 static int bt_rfkill_set_block(void *data, bool blocked)
 429 {
 430         struct toshiba_acpi_dev *dev = data;
 431         u32 result1, result2;
 432         u32 value;
 433         int err;
 434         bool radio_state;
 435
 436         value = (blocked == false);
 437
 438         mutex_lock(&dev->mutex);
 439         if (hci_get_radio_state(&radio_state) != HCI_SUCCESS) {
 440                 err = -EBUSY;
 441                 goto out;
 442         }
 443
 444         if (!radio_state) {
 445                 err = 0;
 446                 goto out;
 447         }
 448
 449         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 450         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 451
 452         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 453                 err = -EBUSY;
 454         else
 455                 err = 0;
 456  out:
 457         mutex_unlock(&dev->mutex);
 458         return err;
 459 }
 460
 461 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 462 {
 463         bool new_rfk_state;
 464         bool value;
 465         u32 hci_result;
 466         struct toshiba_acpi_dev *dev = data;
 467
 468         mutex_lock(&dev->mutex);
 469
 470         hci_result = hci_get_radio_state(&value);
 471         if (hci_result != HCI_SUCCESS) {
 472                 /* Can't do anything useful */
 473                 mutex_unlock(&dev->mutex);
 474                 return;
 475         }
 476
 477         new_rfk_state = value;
 478
 479         mutex_unlock(&dev->mutex);
 480
 481         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 482                 bt_rfkill_set_block(data, true);
 483 }
 484
 485 static const struct rfkill_ops toshiba_rfk_ops = {
 486         .set_block = bt_rfkill_set_block,
 487         .poll = bt_rfkill_poll,
 488 };
 489
 490 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 491 static struct backlight_device *toshiba_backlight_device;
 492 static int force_fan;
 493 static int last_key_event;
 494 static int key_event_valid;
 495
 496 static int get_lcd(struct backlight_device *bd)
 497 {
 498         u32 hci_result;
 499         u32 value;
 500
 501         hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result);
 502         if (hci_result == HCI_SUCCESS) {
 503                 return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 504         } else
 505                 return -EFAULT;
 506 }
 507
 508 static int lcd_proc_show(struct seq_file *m, void *v)
 509 {
 510         int value = get_lcd(NULL);
 511
 512         if (value >= 0) {
 513                 seq_printf(m, "brightness:              %d\n", value);
 514                 seq_printf(m, "brightness_levels:       %d\n",
 515                              HCI_LCD_BRIGHTNESS_LEVELS);
 516         } else {
 517                 pr_err("Error reading LCD brightness\n");
 518         }
 519
 520         return 0;
 521 }
 522
 523 static int lcd_proc_open(struct inode *inode, struct file *file)
 524 {
 525         return single_open(file, lcd_proc_show, NULL);
 526 }
 527
 528 static int set_lcd(int value)
 529 {
 530         u32 hci_result;
 531
 532         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 533         hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result);
 534         if (hci_result != HCI_SUCCESS)
 535                 return -EFAULT;
 536
 537         return 0;
 538 }
 539
 540 static int set_lcd_status(struct backlight_device *bd)
 541 {
 542         return set_lcd(bd->props.brightness);
 543 }
 544
 545 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 546                               size_t count, loff_t *pos)
 547 {
 548         char cmd[42];
 549         size_t len;
 550         int value;
 551         int ret;
 552
 553         len = min(count, sizeof(cmd) - 1);
 554         if (copy_from_user(cmd, buf, len))
 555                 return -EFAULT;
 556         cmd[len] = '\0';
 557
 558         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 559             value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
 560                 ret = set_lcd(value);
 561                 if (ret == 0)
 562                         ret = count;
 563         } else {
 564                 ret = -EINVAL;
 565         }
 566         return ret;
 567 }
 568
 569 static const struct file_operations lcd_proc_fops = {
 570         .owner          = THIS_MODULE,
 571         .open           = lcd_proc_open,
 572         .read           = seq_read,
 573         .llseek         = seq_lseek,
 574         .release        = single_release,
 575         .write          = lcd_proc_write,
 576 };
 577
 578 static int video_proc_show(struct seq_file *m, void *v)
 579 {
 580         u32 hci_result;
 581         u32 value;
 582
 583         hci_read1(HCI_VIDEO_OUT, &value, &hci_result);
 584         if (hci_result == HCI_SUCCESS) {
 585                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 586                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 587                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 588                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 589                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 590                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 591         } else {
 592                 pr_err("Error reading video out status\n");
 593         }
 594
 595         return 0;
 596 }
 597
 598 static int video_proc_open(struct inode *inode, struct file *file)
 599 {
 600         return single_open(file, video_proc_show, NULL);
 601 }
 602
 603 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 604                                 size_t count, loff_t *pos)
 605 {
 606         char *cmd, *buffer;
 607         int value;
 608         int remain = count;
 609         int lcd_out = -1;
 610         int crt_out = -1;
 611         int tv_out = -1;
 612         u32 hci_result;
 613         u32 video_out;
 614
 615         cmd = kmalloc(count + 1, GFP_KERNEL);
 616         if (!cmd)
 617                 return -ENOMEM;
 618         if (copy_from_user(cmd, buf, count)) {
 619                 kfree(cmd);
 620                 return -EFAULT;
 621         }
 622         cmd[count] = '\0';
 623
 624         buffer = cmd;
 625
 626         /* scan expression.  Multiple expressions may be delimited with ;
 627          *
 628          *  NOTE: to keep scanning simple, invalid fields are ignored
 629          */
 630         while (remain) {
 631                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 632                         lcd_out = value & 1;
 633                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 634                         crt_out = value & 1;
 635                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 636                         tv_out = value & 1;
 637                 /* advance to one character past the next ; */
 638                 do {
 639                         ++buffer;
 640                         --remain;
 641                 }
 642                 while (remain && *(buffer - 1) != ';');
 643         }
 644
 645         kfree(cmd);
 646
 647         hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
 648         if (hci_result == HCI_SUCCESS) {
 649                 unsigned int new_video_out = video_out;
 650                 if (lcd_out != -1)
 651                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 652                 if (crt_out != -1)
 653                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 654                 if (tv_out != -1)
 655                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 656                 /* To avoid unnecessary video disruption, only write the new
 657                  * video setting if something changed. */
 658                 if (new_video_out != video_out)
 659                         write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 660         } else {
 661                 return -EFAULT;
 662         }
 663
 664         return count;
 665 }
 666
 667 static const struct file_operations video_proc_fops = {
 668         .owner          = THIS_MODULE,
 669         .open           = video_proc_open,
 670         .read           = seq_read,
 671         .llseek         = seq_lseek,
 672         .release        = single_release,
 673         .write          = video_proc_write,
 674 };
 675
 676 static int fan_proc_show(struct seq_file *m, void *v)
 677 {
 678         u32 hci_result;
 679         u32 value;
 680
 681         hci_read1(HCI_FAN, &value, &hci_result);
 682         if (hci_result == HCI_SUCCESS) {
 683                 seq_printf(m, "running:                 %d\n", (value > 0));
 684                 seq_printf(m, "force_on:                %d\n", force_fan);
 685         } else {
 686                 pr_err("Error reading fan status\n");
 687         }
 688
 689         return 0;
 690 }
 691
 692 static int fan_proc_open(struct inode *inode, struct file *file)
 693 {
 694         return single_open(file, fan_proc_show, NULL);
 695 }
 696
 697 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
 698                               size_t count, loff_t *pos)
 699 {
 700         char cmd[42];
 701         size_t len;
 702         int value;
 703         u32 hci_result;
 704
 705         len = min(count, sizeof(cmd) - 1);
 706         if (copy_from_user(cmd, buf, len))
 707                 return -EFAULT;
 708         cmd[len] = '\0';
 709
 710         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
 711             value >= 0 && value <= 1) {
 712                 hci_write1(HCI_FAN, value, &hci_result);
 713                 if (hci_result != HCI_SUCCESS)
 714                         return -EFAULT;
 715                 else
 716                         force_fan = value;
 717         } else {
 718                 return -EINVAL;
 719         }
 720
 721         return count;
 722 }
 723
 724 static const struct file_operations fan_proc_fops = {
 725         .owner          = THIS_MODULE,
 726         .open           = fan_proc_open,
 727         .read           = seq_read,
 728         .llseek         = seq_lseek,
 729         .release        = single_release,
 730         .write          = fan_proc_write,
 731 };
 732
 733 static int keys_proc_show(struct seq_file *m, void *v)
 734 {
 735         u32 hci_result;
 736         u32 value;
 737
 738         if (!key_event_valid) {
 739                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 740                 if (hci_result == HCI_SUCCESS) {
 741                         key_event_valid = 1;
 742                         last_key_event = value;
 743                 } else if (hci_result == HCI_EMPTY) {
 744                         /* better luck next time */
 745                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 746                         /* This is a workaround for an unresolved issue on
 747                          * some machines where system events sporadically
 748                          * become disabled. */
 749                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 750                         pr_notice("Re-enabled hotkeys\n");
 751                 } else {
 752                         pr_err("Error reading hotkey status\n");
 753                         goto end;
 754                 }
 755         }
 756
 757         seq_printf(m, "hotkey_ready:            %d\n", key_event_valid);
 758         seq_printf(m, "hotkey:                  0x%04x\n", last_key_event);
 759 end:
 760         return 0;
 761 }
 762
 763 static int keys_proc_open(struct inode *inode, struct file *file)
 764 {
 765         return single_open(file, keys_proc_show, NULL);
 766 }
 767
 768 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
 769                                size_t count, loff_t *pos)
 770 {
 771         char cmd[42];
 772         size_t len;
 773         int value;
 774
 775         len = min(count, sizeof(cmd) - 1);
 776         if (copy_from_user(cmd, buf, len))
 777                 return -EFAULT;
 778         cmd[len] = '\0';
 779
 780         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
 781                 key_event_valid = 0;
 782         } else {
 783                 return -EINVAL;
 784         }
 785
 786         return count;
 787 }
 788
 789 static const struct file_operations keys_proc_fops = {
 790         .owner          = THIS_MODULE,
 791         .open           = keys_proc_open,
 792         .read           = seq_read,
 793         .llseek         = seq_lseek,
 794         .release        = single_release,
 795         .write          = keys_proc_write,
 796 };
 797
 798 static int version_proc_show(struct seq_file *m, void *v)
 799 {
 800         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 801         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
 802         return 0;
 803 }
 804
 805 static int version_proc_open(struct inode *inode, struct file *file)
 806 {
 807         return single_open(file, version_proc_show, PDE(inode)->data);
 808 }
 809
 810 static const struct file_operations version_proc_fops = {
 811         .owner          = THIS_MODULE,
 812         .open           = version_proc_open,
 813         .read           = seq_read,
 814         .llseek         = seq_lseek,
 815         .release        = single_release,
 816 };
 817
 818 /* proc and module init
 819  */
 820
 821 #define PROC_TOSHIBA            "toshiba"
 822
 823 static void __init create_toshiba_proc_entries(void)
 824 {
 825         proc_create("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, &lcd_proc_fops);
 826         proc_create("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, &video_proc_fops);
 827         proc_create("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, &fan_proc_fops);
 828         proc_create("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, &keys_proc_fops);
 829         proc_create("version", S_IRUGO, toshiba_proc_dir, &version_proc_fops);
 830 }
 831
 832 static void remove_toshiba_proc_entries(void)
 833 {
 834         remove_proc_entry("lcd", toshiba_proc_dir);
 835         remove_proc_entry("video", toshiba_proc_dir);
 836         remove_proc_entry("fan", toshiba_proc_dir);
 837         remove_proc_entry("keys", toshiba_proc_dir);
 838         remove_proc_entry("version", toshiba_proc_dir);
 839 }
 840
 841 static const struct backlight_ops toshiba_backlight_data = {
 842         .get_brightness = get_lcd,
 843         .update_status  = set_lcd_status,
 844 };
 845
 846 static void toshiba_acpi_notify(acpi_handle handle, u32 event, void *context)
 847 {
 848         u32 hci_result, value;
 849
 850         if (event != 0x80)
 851                 return;
 852         do {
 853                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 854                 if (hci_result == HCI_SUCCESS) {
 855                         if (value == 0x100)
 856                                 continue;
 857                         /* act on key press; ignore key release */
 858                         if (value & 0x80)
 859                                 continue;
 860
 861                         if (!sparse_keymap_report_event(toshiba_acpi.hotkey_dev,
 862                                                         value, 1, true)) {
 863                                 pr_info("Unknown key %x\n",
 864                                        value);
 865                         }
 866                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 867                         /* This is a workaround for an unresolved issue on
 868                          * some machines where system events sporadically
 869                          * become disabled. */
 870                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 871                         pr_notice("Re-enabled hotkeys\n");
 872                 }
 873         } while (hci_result != HCI_EMPTY);
 874 }
 875
 876 static int __init toshiba_acpi_setup_keyboard(char *device)
 877 {
 878         acpi_status status;
 879         int error;
 880
 881         status = acpi_get_handle(NULL, device, &toshiba_acpi.handle);
 882         if (ACPI_FAILURE(status)) {
 883                 pr_info("Unable to get notification device\n");
 884                 return -ENODEV;
 885         }
 886
 887         toshiba_acpi.hotkey_dev = input_allocate_device();
 888         if (!toshiba_acpi.hotkey_dev) {
 889                 pr_info("Unable to register input device\n");
 890                 return -ENOMEM;
 891         }
 892
 893         toshiba_acpi.hotkey_dev->name = "Toshiba input device";
 894         toshiba_acpi.hotkey_dev->phys = device;
 895         toshiba_acpi.hotkey_dev->id.bustype = BUS_HOST;
 896
 897         error = sparse_keymap_setup(toshiba_acpi.hotkey_dev,
 898                                     toshiba_acpi_keymap, NULL);
 899         if (error)
 900                 goto err_free_dev;
 901
 902         status = acpi_install_notify_handler(toshiba_acpi.handle,
 903                                 ACPI_DEVICE_NOTIFY, toshiba_acpi_notify, NULL);
 904         if (ACPI_FAILURE(status)) {
 905                 pr_info("Unable to install hotkey notification\n");
 906                 error = -ENODEV;
 907                 goto err_free_keymap;
 908         }
 909
 910         status = acpi_evaluate_object(toshiba_acpi.handle, "ENAB", NULL, NULL);
 911         if (ACPI_FAILURE(status)) {
 912                 pr_info("Unable to enable hotkeys\n");
 913                 error = -ENODEV;
 914                 goto err_remove_notify;
 915         }
 916
 917         error = input_register_device(toshiba_acpi.hotkey_dev);
 918         if (error) {
 919                 pr_info("Unable to register input device\n");
 920                 goto err_remove_notify;
 921         }
 922
 923         return 0;
 924
 925  err_remove_notify:
 926         acpi_remove_notify_handler(toshiba_acpi.handle,
 927                                    ACPI_DEVICE_NOTIFY, toshiba_acpi_notify);
 928  err_free_keymap:
 929         sparse_keymap_free(toshiba_acpi.hotkey_dev);
 930  err_free_dev:
 931         input_free_device(toshiba_acpi.hotkey_dev);
 932         toshiba_acpi.hotkey_dev = NULL;
 933         return error;
 934 }
 935
 936 static void toshiba_acpi_exit(void)
 937 {
 938         if (toshiba_acpi.hotkey_dev) {
 939                 acpi_remove_notify_handler(toshiba_acpi.handle,
 940                                 ACPI_DEVICE_NOTIFY, toshiba_acpi_notify);
 941                 sparse_keymap_free(toshiba_acpi.hotkey_dev);
 942                 input_unregister_device(toshiba_acpi.hotkey_dev);
 943         }
 944
 945         if (toshiba_acpi.bt_rfk) {
 946                 rfkill_unregister(toshiba_acpi.bt_rfk);
 947                 rfkill_destroy(toshiba_acpi.bt_rfk);
 948         }
 949
 950         if (toshiba_backlight_device)
 951                 backlight_device_unregister(toshiba_backlight_device);
 952
 953         remove_toshiba_proc_entries();
 954
 955         if (toshiba_proc_dir)
 956                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
 957
 958         if (toshiba_acpi.illumination_installed)
 959                 led_classdev_unregister(&toshiba_led);
 960
 961         platform_device_unregister(toshiba_acpi.p_dev);
 962
 963         return;
 964 }
 965
 966 static int __init toshiba_acpi_init(void)
 967 {
 968         u32 hci_result;
 969         bool bt_present;
 970         int ret = 0;
 971         struct backlight_properties props;
 972
 973         if (acpi_disabled)
 974                 return -ENODEV;
 975
 976         /* simple device detection: look for HCI method */
 977         if (is_valid_acpi_path(TOSH_INTERFACE_1 GHCI_METHOD)) {
 978                 method_hci = TOSH_INTERFACE_1 GHCI_METHOD;
 979                 if (toshiba_acpi_setup_keyboard(TOSH_INTERFACE_1))
 980                         pr_info("Unable to activate hotkeys\n");
 981         } else if (is_valid_acpi_path(TOSH_INTERFACE_2 GHCI_METHOD)) {
 982                 method_hci = TOSH_INTERFACE_2 GHCI_METHOD;
 983                 if (toshiba_acpi_setup_keyboard(TOSH_INTERFACE_2))
 984                         pr_info("Unable to activate hotkeys\n");
 985         } else
 986                 return -ENODEV;
 987
 988         pr_info("Toshiba Laptop ACPI Extras version %s\n",
 989                TOSHIBA_ACPI_VERSION);
 990         pr_info("    HCI method: %s\n", method_hci);
 991
 992         mutex_init(&toshiba_acpi.mutex);
 993
 994         toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi",
 995                                                               -1, NULL, 0);
 996         if (IS_ERR(toshiba_acpi.p_dev)) {
 997                 ret = PTR_ERR(toshiba_acpi.p_dev);
 998                 pr_err("unable to register platform device\n");
 999                 toshiba_acpi.p_dev = NULL;
1000                 toshiba_acpi_exit();
1001                 return ret;
1002         }
1003
1004         force_fan = 0;
1005         key_event_valid = 0;
1006
1007         /* enable event fifo */
1008         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
1009
1010         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1011         if (!toshiba_proc_dir) {
1012                 toshiba_acpi_exit();
1013                 return -ENODEV;
1014         } else {
1015                 create_toshiba_proc_entries();
1016         }
1017
1018         props.type = BACKLIGHT_PLATFORM;
1019         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
1020         toshiba_backlight_device = backlight_device_register("toshiba",
1021                                                              &toshiba_acpi.p_dev->dev,
1022                                                              NULL,
1023                                                              &toshiba_backlight_data,
1024                                                              &props);
1025         if (IS_ERR(toshiba_backlight_device)) {
1026                 ret = PTR_ERR(toshiba_backlight_device);
1027
1028                 pr_err("Could not register toshiba backlight device\n");
1029                 toshiba_backlight_device = NULL;
1030                 toshiba_acpi_exit();
1031                 return ret;
1032         }
1033
1034         /* Register rfkill switch for Bluetooth */
1035         if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) {
1036                 toshiba_acpi.bt_rfk = rfkill_alloc(toshiba_acpi.bt_name,
1037                                                    &toshiba_acpi.p_dev->dev,
1038                                                    RFKILL_TYPE_BLUETOOTH,
1039                                                    &toshiba_rfk_ops,
1040                                                    &toshiba_acpi);
1041                 if (!toshiba_acpi.bt_rfk) {
1042                         pr_err("unable to allocate rfkill device\n");
1043                         toshiba_acpi_exit();
1044                         return -ENOMEM;
1045                 }
1046
1047                 ret = rfkill_register(toshiba_acpi.bt_rfk);
1048                 if (ret) {
1049                         pr_err("unable to register rfkill device\n");
1050                         rfkill_destroy(toshiba_acpi.bt_rfk);
1051                         toshiba_acpi_exit();
1052                         return ret;
1053                 }
1054         }
1055
1056         toshiba_acpi.illumination_installed = 0;
1057         if (toshiba_illumination_available()) {
1058                 if (!led_classdev_register(&(toshiba_acpi.p_dev->dev),
1059                                            &toshiba_led))
1060                         toshiba_acpi.illumination_installed = 1;
1061         }
1062
1063         return 0;
1064 }
1065
1066 module_init(toshiba_acpi_init);
1067 module_exit(toshiba_acpi_exit);