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 TOSHIBA_ACPI_VERSION    "0.19"
  39 #define PROC_INTERFACE_VERSION  1
  40
  41 #include <linux/kernel.h>
  42 #include <linux/module.h>
  43 #include <linux/init.h>
  44 #include <linux/types.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/seq_file.h>
  47 #include <linux/backlight.h>
  48 #include <linux/platform_device.h>
  49 #include <linux/rfkill.h>
  50 #include <linux/input.h>
  51 #include <linux/input/sparse-keymap.h>
  52 #include <linux/leds.h>
  53 #include <linux/slab.h>
  54
  55 #include <asm/uaccess.h>
  56
  57 #include <acpi/acpi_drivers.h>
  58
  59 MODULE_AUTHOR("John Belmonte");
  60 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  61 MODULE_LICENSE("GPL");
  62
  63 #define MY_LOGPREFIX "toshiba_acpi: "
  64 #define MY_ERR KERN_ERR MY_LOGPREFIX
  65 #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX
  66 #define MY_INFO KERN_INFO MY_LOGPREFIX
  67
  68 /* Toshiba ACPI method paths */
  69 #define METHOD_LCD_BRIGHTNESS   "\\_SB_.PCI0.VGA_.LCD_._BCM"
  70 #define TOSH_INTERFACE_1        "\\_SB_.VALD"
  71 #define TOSH_INTERFACE_2        "\\_SB_.VALZ"
  72 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  73 #define GHCI_METHOD             ".GHCI"
  74
  75 /* Toshiba HCI interface definitions
  76  *
  77  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  78  * be uniform across all their models.  Ideally we would just call
  79  * dedicated ACPI methods instead of using this primitive interface.
  80  * However the ACPI methods seem to be incomplete in some areas (for
  81  * example they allow setting, but not reading, the LCD brightness value),
  82  * so this is still useful.
  83  */
  84
  85 #define HCI_WORDS                       6
  86
  87 /* operations */
  88 #define HCI_SET                         0xff00
  89 #define HCI_GET                         0xfe00
  90
  91 /* return codes */
  92 #define HCI_SUCCESS                     0x0000
  93 #define HCI_FAILURE                     0x1000
  94 #define HCI_NOT_SUPPORTED               0x8000
  95 #define HCI_EMPTY                       0x8c00
  96
  97 /* registers */
  98 #define HCI_FAN                         0x0004
  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_LCD_BRIGHTNESS_BITS         3
 107 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 108 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 109 #define HCI_VIDEO_OUT_LCD               0x1
 110 #define HCI_VIDEO_OUT_CRT               0x2
 111 #define HCI_VIDEO_OUT_TV                0x4
 112 #define HCI_WIRELESS_KILL_SWITCH        0x01
 113 #define HCI_WIRELESS_BT_PRESENT         0x0f
 114 #define HCI_WIRELESS_BT_ATTACH          0x40
 115 #define HCI_WIRELESS_BT_POWER           0x80
 116
 117 static const struct acpi_device_id toshiba_device_ids[] = {
 118         {"TOS6200", 0},
 119         {"TOS6208", 0},
 120         {"TOS1900", 0},
 121         {"", 0},
 122 };
 123 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 124
 125 static const struct key_entry toshiba_acpi_keymap[] __initconst = {
 126         { KE_KEY, 0x101, { KEY_MUTE } },
 127         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 128         { KE_KEY, 0x103, { KEY_ZOOMIN } },
 129         { KE_KEY, 0x13b, { KEY_COFFEE } },
 130         { KE_KEY, 0x13c, { KEY_BATTERY } },
 131         { KE_KEY, 0x13d, { KEY_SLEEP } },
 132         { KE_KEY, 0x13e, { KEY_SUSPEND } },
 133         { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
 134         { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
 135         { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
 136         { KE_KEY, 0x142, { KEY_WLAN } },
 137         { KE_KEY, 0x143, { KEY_PROG1 } },
 138         { KE_KEY, 0xb05, { KEY_PROG2 } },
 139         { KE_KEY, 0xb06, { KEY_WWW } },
 140         { KE_KEY, 0xb07, { KEY_MAIL } },
 141         { KE_KEY, 0xb30, { KEY_STOP } },
 142         { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
 143         { KE_KEY, 0xb32, { KEY_NEXTSONG } },
 144         { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
 145         { KE_KEY, 0xb5a, { KEY_MEDIA } },
 146         { KE_END, 0 },
 147 };
 148
 149 /* utility
 150  */
 151
 152 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 153 {
 154         *word = (*word & ~mask) | (mask * value);
 155 }
 156
 157 /* acpi interface wrappers
 158  */
 159
 160 static int is_valid_acpi_path(const char *methodName)
 161 {
 162         acpi_handle handle;
 163         acpi_status status;
 164
 165         status = acpi_get_handle(NULL, (char *)methodName, &handle);
 166         return !ACPI_FAILURE(status);
 167 }
 168
 169 static int write_acpi_int(const char *methodName, int val)
 170 {
 171         struct acpi_object_list params;
 172         union acpi_object in_objs[1];
 173         acpi_status status;
 174
 175         params.count = ARRAY_SIZE(in_objs);
 176         params.pointer = in_objs;
 177         in_objs[0].type = ACPI_TYPE_INTEGER;
 178         in_objs[0].integer.value = val;
 179
 180         status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
 181         return (status == AE_OK);
 182 }
 183
 184 #if 0
 185 static int read_acpi_int(const char *methodName, int *pVal)
 186 {
 187         struct acpi_buffer results;
 188         union acpi_object out_objs[1];
 189         acpi_status status;
 190
 191         results.length = sizeof(out_objs);
 192         results.pointer = out_objs;
 193
 194         status = acpi_evaluate_object(0, (char *)methodName, 0, &results);
 195         *pVal = out_objs[0].integer.value;
 196
 197         return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER);
 198 }
 199 #endif
 200
 201 static const char *method_hci /*= 0*/ ;
 202
 203 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 204  * format.
 205  */
 206 static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 207 {
 208         struct acpi_object_list params;
 209         union acpi_object in_objs[HCI_WORDS];
 210         struct acpi_buffer results;
 211         union acpi_object out_objs[HCI_WORDS + 1];
 212         acpi_status status;
 213         int i;
 214
 215         params.count = HCI_WORDS;
 216         params.pointer = in_objs;
 217         for (i = 0; i < HCI_WORDS; ++i) {
 218                 in_objs[i].type = ACPI_TYPE_INTEGER;
 219                 in_objs[i].integer.value = in[i];
 220         }
 221
 222         results.length = sizeof(out_objs);
 223         results.pointer = out_objs;
 224
 225         status = acpi_evaluate_object(NULL, (char *)method_hci, &params,
 226                                       &results);
 227         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 228                 for (i = 0; i < out_objs->package.count; ++i) {
 229                         out[i] = out_objs->package.elements[i].integer.value;
 230                 }
 231         }
 232
 233         return status;
 234 }
 235
 236 /* common hci tasks (get or set one or two value)
 237  *
 238  * In addition to the ACPI status, the HCI system returns a result which
 239  * may be useful (such as "not supported").
 240  */
 241
 242 static acpi_status hci_write1(u32 reg, 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(in, out);
 247         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 248         return status;
 249 }
 250
 251 static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result)
 252 {
 253         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 254         u32 out[HCI_WORDS];
 255         acpi_status status = hci_raw(in, out);
 256         *out1 = out[2];
 257         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 258         return status;
 259 }
 260
 261 static acpi_status hci_write2(u32 reg, u32 in1, u32 in2, u32 *result)
 262 {
 263         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 264         u32 out[HCI_WORDS];
 265         acpi_status status = hci_raw(in, out);
 266         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 267         return status;
 268 }
 269
 270 static acpi_status hci_read2(u32 reg, u32 *out1, u32 *out2, u32 *result)
 271 {
 272         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 273         u32 out[HCI_WORDS];
 274         acpi_status status = hci_raw(in, out);
 275         *out1 = out[2];
 276         *out2 = out[3];
 277         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 278         return status;
 279 }
 280
 281 struct toshiba_acpi_dev {
 282         struct platform_device *p_dev;
 283         struct rfkill *bt_rfk;
 284         struct input_dev *hotkey_dev;
 285         int illumination_installed;
 286         acpi_handle handle;
 287
 288         const char *bt_name;
 289
 290         struct mutex mutex;
 291 };
 292
 293 /* Illumination support */
 294 static int toshiba_illumination_available(void)
 295 {
 296         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 297         u32 out[HCI_WORDS];
 298         acpi_status status;
 299
 300         in[0] = 0xf100;
 301         status = hci_raw(in, out);
 302         if (ACPI_FAILURE(status)) {
 303                 printk(MY_INFO "Illumination device not available\n");
 304                 return 0;
 305         }
 306         in[0] = 0xf400;
 307         status = hci_raw(in, out);
 308         return 1;
 309 }
 310
 311 static void toshiba_illumination_set(struct led_classdev *cdev,
 312                                      enum led_brightness brightness)
 313 {
 314         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 315         u32 out[HCI_WORDS];
 316         acpi_status status;
 317
 318         /* First request : initialize communication. */
 319         in[0] = 0xf100;
 320         status = hci_raw(in, out);
 321         if (ACPI_FAILURE(status)) {
 322                 printk(MY_INFO "Illumination device not available\n");
 323                 return;
 324         }
 325
 326         if (brightness) {
 327                 /* Switch the illumination on */
 328                 in[0] = 0xf400;
 329                 in[1] = 0x14e;
 330                 in[2] = 1;
 331                 status = hci_raw(in, out);
 332                 if (ACPI_FAILURE(status)) {
 333                         printk(MY_INFO "ACPI call for illumination failed.\n");
 334                         return;
 335                 }
 336         } else {
 337                 /* Switch the illumination off */
 338                 in[0] = 0xf400;
 339                 in[1] = 0x14e;
 340                 in[2] = 0;
 341                 status = hci_raw(in, out);
 342                 if (ACPI_FAILURE(status)) {
 343                         printk(MY_INFO "ACPI call for illumination failed.\n");
 344                         return;
 345                 }
 346         }
 347
 348         /* Last request : close communication. */
 349         in[0] = 0xf200;
 350         in[1] = 0;
 351         in[2] = 0;
 352         hci_raw(in, out);
 353 }
 354
 355 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
 356 {
 357         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 358         u32 out[HCI_WORDS];
 359         acpi_status status;
 360         enum led_brightness result;
 361
 362         /* First request : initialize communication. */
 363         in[0] = 0xf100;
 364         status = hci_raw(in, out);
 365         if (ACPI_FAILURE(status)) {
 366                 printk(MY_INFO "Illumination device not available\n");
 367                 return LED_OFF;
 368         }
 369
 370         /* Check the illumination */
 371         in[0] = 0xf300;
 372         in[1] = 0x14e;
 373         status = hci_raw(in, out);
 374         if (ACPI_FAILURE(status)) {
 375                 printk(MY_INFO "ACPI call for illumination failed.\n");
 376                 return LED_OFF;
 377         }
 378
 379         result = out[2] ? LED_FULL : LED_OFF;
 380
 381         /* Last request : close communication. */
 382         in[0] = 0xf200;
 383         in[1] = 0;
 384         in[2] = 0;
 385         hci_raw(in, out);
 386
 387         return result;
 388 }
 389
 390 static struct led_classdev toshiba_led = {
 391         .name           = "toshiba::illumination",
 392         .max_brightness = 1,
 393         .brightness_set = toshiba_illumination_set,
 394         .brightness_get = toshiba_illumination_get,
 395 };
 396
 397 static struct toshiba_acpi_dev toshiba_acpi = {
 398         .bt_name = "Toshiba Bluetooth",
 399 };
 400
 401 /* Bluetooth rfkill handlers */
 402
 403 static u32 hci_get_bt_present(bool *present)
 404 {
 405         u32 hci_result;
 406         u32 value, value2;
 407
 408         value = 0;
 409         value2 = 0;
 410         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 411         if (hci_result == HCI_SUCCESS)
 412                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 413
 414         return hci_result;
 415 }
 416
 417 static u32 hci_get_radio_state(bool *radio_state)
 418 {
 419         u32 hci_result;
 420         u32 value, value2;
 421
 422         value = 0;
 423         value2 = 0x0001;
 424         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 425
 426         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 427         return hci_result;
 428 }
 429
 430 static int bt_rfkill_set_block(void *data, bool blocked)
 431 {
 432         struct toshiba_acpi_dev *dev = data;
 433         u32 result1, result2;
 434         u32 value;
 435         int err;
 436         bool radio_state;
 437
 438         value = (blocked == false);
 439
 440         mutex_lock(&dev->mutex);
 441         if (hci_get_radio_state(&radio_state) != HCI_SUCCESS) {
 442                 err = -EBUSY;
 443                 goto out;
 444         }
 445
 446         if (!radio_state) {
 447                 err = 0;
 448                 goto out;
 449         }
 450
 451         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 452         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 453
 454         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 455                 err = -EBUSY;
 456         else
 457                 err = 0;
 458  out:
 459         mutex_unlock(&dev->mutex);
 460         return err;
 461 }
 462
 463 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 464 {
 465         bool new_rfk_state;
 466         bool value;
 467         u32 hci_result;
 468         struct toshiba_acpi_dev *dev = data;
 469
 470         mutex_lock(&dev->mutex);
 471
 472         hci_result = hci_get_radio_state(&value);
 473         if (hci_result != HCI_SUCCESS) {
 474                 /* Can't do anything useful */
 475                 mutex_unlock(&dev->mutex);
 476                 return;
 477         }
 478
 479         new_rfk_state = value;
 480
 481         mutex_unlock(&dev->mutex);
 482
 483         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 484                 bt_rfkill_set_block(data, true);
 485 }
 486
 487 static const struct rfkill_ops toshiba_rfk_ops = {
 488         .set_block = bt_rfkill_set_block,
 489         .poll = bt_rfkill_poll,
 490 };
 491
 492 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 493 static struct backlight_device *toshiba_backlight_device;
 494 static int force_fan;
 495 static int last_key_event;
 496 static int key_event_valid;
 497
 498 static int get_lcd(struct backlight_device *bd)
 499 {
 500         u32 hci_result;
 501         u32 value;
 502
 503         hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result);
 504         if (hci_result == HCI_SUCCESS) {
 505                 return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 506         } else
 507                 return -EFAULT;
 508 }
 509
 510 static int lcd_proc_show(struct seq_file *m, void *v)
 511 {
 512         int value = get_lcd(NULL);
 513
 514         if (value >= 0) {
 515                 seq_printf(m, "brightness:              %d\n", value);
 516                 seq_printf(m, "brightness_levels:       %d\n",
 517                              HCI_LCD_BRIGHTNESS_LEVELS);
 518         } else {
 519                 printk(MY_ERR "Error reading LCD brightness\n");
 520         }
 521
 522         return 0;
 523 }
 524
 525 static int lcd_proc_open(struct inode *inode, struct file *file)
 526 {
 527         return single_open(file, lcd_proc_show, NULL);
 528 }
 529
 530 static int set_lcd(int value)
 531 {
 532         u32 hci_result;
 533
 534         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 535         hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result);
 536         if (hci_result != HCI_SUCCESS)
 537                 return -EFAULT;
 538
 539         return 0;
 540 }
 541
 542 static int set_lcd_status(struct backlight_device *bd)
 543 {
 544         return set_lcd(bd->props.brightness);
 545 }
 546
 547 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 548                               size_t count, loff_t *pos)
 549 {
 550         char cmd[42];
 551         size_t len;
 552         int value;
 553         int ret;
 554
 555         len = min(count, sizeof(cmd) - 1);
 556         if (copy_from_user(cmd, buf, len))
 557                 return -EFAULT;
 558         cmd[len] = '\0';
 559
 560         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 561             value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
 562                 ret = set_lcd(value);
 563                 if (ret == 0)
 564                         ret = count;
 565         } else {
 566                 ret = -EINVAL;
 567         }
 568         return ret;
 569 }
 570
 571 static const struct file_operations lcd_proc_fops = {
 572         .owner          = THIS_MODULE,
 573         .open           = lcd_proc_open,
 574         .read           = seq_read,
 575         .llseek         = seq_lseek,
 576         .release        = single_release,
 577         .write          = lcd_proc_write,
 578 };
 579
 580 static int video_proc_show(struct seq_file *m, void *v)
 581 {
 582         u32 hci_result;
 583         u32 value;
 584
 585         hci_read1(HCI_VIDEO_OUT, &value, &hci_result);
 586         if (hci_result == HCI_SUCCESS) {
 587                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 588                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 589                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 590                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 591                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 592                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 593         } else {
 594                 printk(MY_ERR "Error reading video out status\n");
 595         }
 596
 597         return 0;
 598 }
 599
 600 static int video_proc_open(struct inode *inode, struct file *file)
 601 {
 602         return single_open(file, video_proc_show, NULL);
 603 }
 604
 605 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 606                                 size_t count, loff_t *pos)
 607 {
 608         char *cmd, *buffer;
 609         int value;
 610         int remain = count;
 611         int lcd_out = -1;
 612         int crt_out = -1;
 613         int tv_out = -1;
 614         u32 hci_result;
 615         u32 video_out;
 616
 617         cmd = kmalloc(count + 1, GFP_KERNEL);
 618         if (!cmd)
 619                 return -ENOMEM;
 620         if (copy_from_user(cmd, buf, count)) {
 621                 kfree(cmd);
 622                 return -EFAULT;
 623         }
 624         cmd[count] = '\0';
 625
 626         buffer = cmd;
 627
 628         /* scan expression.  Multiple expressions may be delimited with ;
 629          *
 630          *  NOTE: to keep scanning simple, invalid fields are ignored
 631          */
 632         while (remain) {
 633                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 634                         lcd_out = value & 1;
 635                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 636                         crt_out = value & 1;
 637                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 638                         tv_out = value & 1;
 639                 /* advance to one character past the next ; */
 640                 do {
 641                         ++buffer;
 642                         --remain;
 643                 }
 644                 while (remain && *(buffer - 1) != ';');
 645         }
 646
 647         kfree(cmd);
 648
 649         hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
 650         if (hci_result == HCI_SUCCESS) {
 651                 unsigned int new_video_out = video_out;
 652                 if (lcd_out != -1)
 653                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 654                 if (crt_out != -1)
 655                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 656                 if (tv_out != -1)
 657                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 658                 /* To avoid unnecessary video disruption, only write the new
 659                  * video setting if something changed. */
 660                 if (new_video_out != video_out)
 661                         write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 662         } else {
 663                 return -EFAULT;
 664         }
 665
 666         return count;
 667 }
 668
 669 static const struct file_operations video_proc_fops = {
 670         .owner          = THIS_MODULE,
 671         .open           = video_proc_open,
 672         .read           = seq_read,
 673         .llseek         = seq_lseek,
 674         .release        = single_release,
 675         .write          = video_proc_write,
 676 };
 677
 678 static int fan_proc_show(struct seq_file *m, void *v)
 679 {
 680         u32 hci_result;
 681         u32 value;
 682
 683         hci_read1(HCI_FAN, &value, &hci_result);
 684         if (hci_result == HCI_SUCCESS) {
 685                 seq_printf(m, "running:                 %d\n", (value > 0));
 686                 seq_printf(m, "force_on:                %d\n", force_fan);
 687         } else {
 688                 printk(MY_ERR "Error reading fan status\n");
 689         }
 690
 691         return 0;
 692 }
 693
 694 static int fan_proc_open(struct inode *inode, struct file *file)
 695 {
 696         return single_open(file, fan_proc_show, NULL);
 697 }
 698
 699 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
 700                               size_t count, loff_t *pos)
 701 {
 702         char cmd[42];
 703         size_t len;
 704         int value;
 705         u32 hci_result;
 706
 707         len = min(count, sizeof(cmd) - 1);
 708         if (copy_from_user(cmd, buf, len))
 709                 return -EFAULT;
 710         cmd[len] = '\0';
 711
 712         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
 713             value >= 0 && value <= 1) {
 714                 hci_write1(HCI_FAN, value, &hci_result);
 715                 if (hci_result != HCI_SUCCESS)
 716                         return -EFAULT;
 717                 else
 718                         force_fan = value;
 719         } else {
 720                 return -EINVAL;
 721         }
 722
 723         return count;
 724 }
 725
 726 static const struct file_operations fan_proc_fops = {
 727         .owner          = THIS_MODULE,
 728         .open           = fan_proc_open,
 729         .read           = seq_read,
 730         .llseek         = seq_lseek,
 731         .release        = single_release,
 732         .write          = fan_proc_write,
 733 };
 734
 735 static int keys_proc_show(struct seq_file *m, void *v)
 736 {
 737         u32 hci_result;
 738         u32 value;
 739
 740         if (!key_event_valid) {
 741                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 742                 if (hci_result == HCI_SUCCESS) {
 743                         key_event_valid = 1;
 744                         last_key_event = value;
 745                 } else if (hci_result == HCI_EMPTY) {
 746                         /* better luck next time */
 747                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 748                         /* This is a workaround for an unresolved issue on
 749                          * some machines where system events sporadically
 750                          * become disabled. */
 751                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 752                         printk(MY_NOTICE "Re-enabled hotkeys\n");
 753                 } else {
 754                         printk(MY_ERR "Error reading hotkey status\n");
 755                         goto end;
 756                 }
 757         }
 758
 759         seq_printf(m, "hotkey_ready:            %d\n", key_event_valid);
 760         seq_printf(m, "hotkey:                  0x%04x\n", last_key_event);
 761 end:
 762         return 0;
 763 }
 764
 765 static int keys_proc_open(struct inode *inode, struct file *file)
 766 {
 767         return single_open(file, keys_proc_show, NULL);
 768 }
 769
 770 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
 771                                size_t count, loff_t *pos)
 772 {
 773         char cmd[42];
 774         size_t len;
 775         int value;
 776
 777         len = min(count, sizeof(cmd) - 1);
 778         if (copy_from_user(cmd, buf, len))
 779                 return -EFAULT;
 780         cmd[len] = '\0';
 781
 782         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
 783                 key_event_valid = 0;
 784         } else {
 785                 return -EINVAL;
 786         }
 787
 788         return count;
 789 }
 790
 791 static const struct file_operations keys_proc_fops = {
 792         .owner          = THIS_MODULE,
 793         .open           = keys_proc_open,
 794         .read           = seq_read,
 795         .llseek         = seq_lseek,
 796         .release        = single_release,
 797         .write          = keys_proc_write,
 798 };
 799
 800 static int version_proc_show(struct seq_file *m, void *v)
 801 {
 802         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 803         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
 804         return 0;
 805 }
 806
 807 static int version_proc_open(struct inode *inode, struct file *file)
 808 {
 809         return single_open(file, version_proc_show, PDE(inode)->data);
 810 }
 811
 812 static const struct file_operations version_proc_fops = {
 813         .owner          = THIS_MODULE,
 814         .open           = version_proc_open,
 815         .read           = seq_read,
 816         .llseek         = seq_lseek,
 817         .release        = single_release,
 818 };
 819
 820 /* proc and module init
 821  */
 822
 823 #define PROC_TOSHIBA            "toshiba"
 824
 825 static void __init create_toshiba_proc_entries(void)
 826 {
 827         proc_create("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, &lcd_proc_fops);
 828         proc_create("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, &video_proc_fops);
 829         proc_create("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, &fan_proc_fops);
 830         proc_create("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, &keys_proc_fops);
 831         proc_create("version", S_IRUGO, toshiba_proc_dir, &version_proc_fops);
 832 }
 833
 834 static void remove_toshiba_proc_entries(void)
 835 {
 836         remove_proc_entry("lcd", toshiba_proc_dir);
 837         remove_proc_entry("video", toshiba_proc_dir);
 838         remove_proc_entry("fan", toshiba_proc_dir);
 839         remove_proc_entry("keys", toshiba_proc_dir);
 840         remove_proc_entry("version", toshiba_proc_dir);
 841 }
 842
 843 static struct backlight_ops toshiba_backlight_data = {
 844         .get_brightness = get_lcd,
 845         .update_status  = set_lcd_status,
 846 };
 847
 848 static void toshiba_acpi_notify(acpi_handle handle, u32 event, void *context)
 849 {
 850         u32 hci_result, value;
 851
 852         if (event != 0x80)
 853                 return;
 854         do {
 855                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 856                 if (hci_result == HCI_SUCCESS) {
 857                         if (value == 0x100)
 858                                 continue;
 859                         /* act on key press; ignore key release */
 860                         if (value & 0x80)
 861                                 continue;
 862
 863                         if (!sparse_keymap_report_event(toshiba_acpi.hotkey_dev,
 864                                                         value, 1, true)) {
 865                                 printk(MY_INFO "Unknown key %x\n",
 866                                        value);
 867                         }
 868                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 869                         /* This is a workaround for an unresolved issue on
 870                          * some machines where system events sporadically
 871                          * become disabled. */
 872                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 873                         printk(MY_NOTICE "Re-enabled hotkeys\n");
 874                 }
 875         } while (hci_result != HCI_EMPTY);
 876 }
 877
 878 static int __init toshiba_acpi_setup_keyboard(char *device)
 879 {
 880         acpi_status status;
 881         int error;
 882
 883         status = acpi_get_handle(NULL, device, &toshiba_acpi.handle);
 884         if (ACPI_FAILURE(status)) {
 885                 printk(MY_INFO "Unable to get notification device\n");
 886                 return -ENODEV;
 887         }
 888
 889         toshiba_acpi.hotkey_dev = input_allocate_device();
 890         if (!toshiba_acpi.hotkey_dev) {
 891                 printk(MY_INFO "Unable to register input device\n");
 892                 return -ENOMEM;
 893         }
 894
 895         toshiba_acpi.hotkey_dev->name = "Toshiba input device";
 896         toshiba_acpi.hotkey_dev->phys = device;
 897         toshiba_acpi.hotkey_dev->id.bustype = BUS_HOST;
 898
 899         error = sparse_keymap_setup(toshiba_acpi.hotkey_dev,
 900                                     toshiba_acpi_keymap, NULL);
 901         if (error)
 902                 goto err_free_dev;
 903
 904         status = acpi_install_notify_handler(toshiba_acpi.handle,
 905                                 ACPI_DEVICE_NOTIFY, toshiba_acpi_notify, NULL);
 906         if (ACPI_FAILURE(status)) {
 907                 printk(MY_INFO "Unable to install hotkey notification\n");
 908                 error = -ENODEV;
 909                 goto err_free_keymap;
 910         }
 911
 912         status = acpi_evaluate_object(toshiba_acpi.handle, "ENAB", NULL, NULL);
 913         if (ACPI_FAILURE(status)) {
 914                 printk(MY_INFO "Unable to enable hotkeys\n");
 915                 error = -ENODEV;
 916                 goto err_remove_notify;
 917         }
 918
 919         error = input_register_device(toshiba_acpi.hotkey_dev);
 920         if (error) {
 921                 printk(MY_INFO "Unable to register input device\n");
 922                 goto err_remove_notify;
 923         }
 924
 925         return 0;
 926
 927  err_remove_notify:
 928         acpi_remove_notify_handler(toshiba_acpi.handle,
 929                                    ACPI_DEVICE_NOTIFY, toshiba_acpi_notify);
 930  err_free_keymap:
 931         sparse_keymap_free(toshiba_acpi.hotkey_dev);
 932  err_free_dev:
 933         input_free_device(toshiba_acpi.hotkey_dev);
 934         toshiba_acpi.hotkey_dev = NULL;
 935         return error;
 936 }
 937
 938 static void toshiba_acpi_exit(void)
 939 {
 940         if (toshiba_acpi.hotkey_dev) {
 941                 acpi_remove_notify_handler(toshiba_acpi.handle,
 942                                 ACPI_DEVICE_NOTIFY, toshiba_acpi_notify);
 943                 sparse_keymap_free(toshiba_acpi.hotkey_dev);
 944                 input_unregister_device(toshiba_acpi.hotkey_dev);
 945         }
 946
 947         if (toshiba_acpi.bt_rfk) {
 948                 rfkill_unregister(toshiba_acpi.bt_rfk);
 949                 rfkill_destroy(toshiba_acpi.bt_rfk);
 950         }
 951
 952         if (toshiba_backlight_device)
 953                 backlight_device_unregister(toshiba_backlight_device);
 954
 955         remove_toshiba_proc_entries();
 956
 957         if (toshiba_proc_dir)
 958                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
 959
 960         if (toshiba_acpi.illumination_installed)
 961                 led_classdev_unregister(&toshiba_led);
 962
 963         platform_device_unregister(toshiba_acpi.p_dev);
 964
 965         return;
 966 }
 967
 968 static int __init toshiba_acpi_init(void)
 969 {
 970         u32 hci_result;
 971         bool bt_present;
 972         int ret = 0;
 973         struct backlight_properties props;
 974
 975         if (acpi_disabled)
 976                 return -ENODEV;
 977
 978         /* simple device detection: look for HCI method */
 979         if (is_valid_acpi_path(TOSH_INTERFACE_1 GHCI_METHOD)) {
 980                 method_hci = TOSH_INTERFACE_1 GHCI_METHOD;
 981                 if (toshiba_acpi_setup_keyboard(TOSH_INTERFACE_1))
 982                         printk(MY_INFO "Unable to activate hotkeys\n");
 983         } else if (is_valid_acpi_path(TOSH_INTERFACE_2 GHCI_METHOD)) {
 984                 method_hci = TOSH_INTERFACE_2 GHCI_METHOD;
 985                 if (toshiba_acpi_setup_keyboard(TOSH_INTERFACE_2))
 986                         printk(MY_INFO "Unable to activate hotkeys\n");
 987         } else
 988                 return -ENODEV;
 989
 990         printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n",
 991                TOSHIBA_ACPI_VERSION);
 992         printk(MY_INFO "    HCI method: %s\n", method_hci);
 993
 994         mutex_init(&toshiba_acpi.mutex);
 995
 996         toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi",
 997                                                               -1, NULL, 0);
 998         if (IS_ERR(toshiba_acpi.p_dev)) {
 999                 ret = PTR_ERR(toshiba_acpi.p_dev);
1000                 printk(MY_ERR "unable to register platform device\n");
1001                 toshiba_acpi.p_dev = NULL;
1002                 toshiba_acpi_exit();
1003                 return ret;
1004         }
1005
1006         force_fan = 0;
1007         key_event_valid = 0;
1008
1009         /* enable event fifo */
1010         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
1011
1012         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1013         if (!toshiba_proc_dir) {
1014                 toshiba_acpi_exit();
1015                 return -ENODEV;
1016         } else {
1017                 create_toshiba_proc_entries();
1018         }
1019
1020         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
1021         toshiba_backlight_device = backlight_device_register("toshiba",
1022                                                              &toshiba_acpi.p_dev->dev,
1023                                                              NULL,
1024                                                              &toshiba_backlight_data,
1025                                                              &props);
1026         if (IS_ERR(toshiba_backlight_device)) {
1027                 ret = PTR_ERR(toshiba_backlight_device);
1028
1029                 printk(KERN_ERR "Could not register toshiba backlight device\n");
1030                 toshiba_backlight_device = NULL;
1031                 toshiba_acpi_exit();
1032                 return ret;
1033         }
1034
1035         /* Register rfkill switch for Bluetooth */
1036         if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) {
1037                 toshiba_acpi.bt_rfk = rfkill_alloc(toshiba_acpi.bt_name,
1038                                                    &toshiba_acpi.p_dev->dev,
1039                                                    RFKILL_TYPE_BLUETOOTH,
1040                                                    &toshiba_rfk_ops,
1041                                                    &toshiba_acpi);
1042                 if (!toshiba_acpi.bt_rfk) {
1043                         printk(MY_ERR "unable to allocate rfkill device\n");
1044                         toshiba_acpi_exit();
1045                         return -ENOMEM;
1046                 }
1047
1048                 ret = rfkill_register(toshiba_acpi.bt_rfk);
1049                 if (ret) {
1050                         printk(MY_ERR "unable to register rfkill device\n");
1051                         rfkill_destroy(toshiba_acpi.bt_rfk);
1052                         toshiba_acpi_exit();
1053                         return ret;
1054                 }
1055         }
1056
1057         toshiba_acpi.illumination_installed = 0;
1058         if (toshiba_illumination_available()) {
1059                 if (!led_classdev_register(&(toshiba_acpi.p_dev->dev),
1060                                            &toshiba_led))
1061                         toshiba_acpi.illumination_installed = 1;
1062         }
1063
1064         return 0;
1065 }
1066
1067 module_init(toshiba_acpi_init);
1068 module_exit(toshiba_acpi_exit);