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  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  *
  23  *  The devolpment page for this driver is located at
  24  *  http://memebeam.org/toys/ToshibaAcpiDriver.
  25  *
  26  *  Credits:
  27  *      Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
  28  *              engineering the Windows drivers
  29  *      Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
  30  *      Rob Miller - TV out and hotkeys help
  31  *
  32  *
  33  *  TODO
  34  *
  35  */
  36
  37 #define TOSHIBA_ACPI_VERSION    "0.19"
  38 #define PROC_INTERFACE_VERSION  1
  39
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/init.h>
  43 #include <linux/types.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/seq_file.h>
  46 #include <linux/backlight.h>
  47 #include <linux/platform_device.h>
  48 #include <linux/rfkill.h>
  49 #include <linux/input.h>
  50
  51 #include <asm/uaccess.h>
  52
  53 #include <acpi/acpi_drivers.h>
  54
  55 MODULE_AUTHOR("John Belmonte");
  56 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  57 MODULE_LICENSE("GPL");
  58
  59 #define MY_LOGPREFIX "toshiba_acpi: "
  60 #define MY_ERR KERN_ERR MY_LOGPREFIX
  61 #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX
  62 #define MY_INFO KERN_INFO MY_LOGPREFIX
  63
  64 /* Toshiba ACPI method paths */
  65 #define METHOD_LCD_BRIGHTNESS   "\\_SB_.PCI0.VGA_.LCD_._BCM"
  66 #define TOSH_INTERFACE_1        "\\_SB_.VALD"
  67 #define TOSH_INTERFACE_2        "\\_SB_.VALZ"
  68 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  69 #define GHCI_METHOD             ".GHCI"
  70
  71 /* Toshiba HCI interface definitions
  72  *
  73  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  74  * be uniform across all their models.  Ideally we would just call
  75  * dedicated ACPI methods instead of using this primitive interface.
  76  * However the ACPI methods seem to be incomplete in some areas (for
  77  * example they allow setting, but not reading, the LCD brightness value),
  78  * so this is still useful.
  79  */
  80
  81 #define HCI_WORDS                       6
  82
  83 /* operations */
  84 #define HCI_SET                         0xff00
  85 #define HCI_GET                         0xfe00
  86
  87 /* return codes */
  88 #define HCI_SUCCESS                     0x0000
  89 #define HCI_FAILURE                     0x1000
  90 #define HCI_NOT_SUPPORTED               0x8000
  91 #define HCI_EMPTY                       0x8c00
  92
  93 /* registers */
  94 #define HCI_FAN                         0x0004
  95 #define HCI_SYSTEM_EVENT                0x0016
  96 #define HCI_VIDEO_OUT                   0x001c
  97 #define HCI_HOTKEY_EVENT                0x001e
  98 #define HCI_LCD_BRIGHTNESS              0x002a
  99 #define HCI_WIRELESS                    0x0056
 100
 101 /* field definitions */
 102 #define HCI_LCD_BRIGHTNESS_BITS         3
 103 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 104 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 105 #define HCI_VIDEO_OUT_LCD               0x1
 106 #define HCI_VIDEO_OUT_CRT               0x2
 107 #define HCI_VIDEO_OUT_TV                0x4
 108 #define HCI_WIRELESS_KILL_SWITCH        0x01
 109 #define HCI_WIRELESS_BT_PRESENT         0x0f
 110 #define HCI_WIRELESS_BT_ATTACH          0x40
 111 #define HCI_WIRELESS_BT_POWER           0x80
 112
 113 static const struct acpi_device_id toshiba_device_ids[] = {
 114         {"TOS6200", 0},
 115         {"TOS6208", 0},
 116         {"TOS1900", 0},
 117         {"", 0},
 118 };
 119 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 120
 121 struct key_entry {
 122         char type;
 123         u16 code;
 124         u16 keycode;
 125 };
 126
 127 enum {KE_KEY, KE_END};
 128
 129 static struct key_entry toshiba_acpi_keymap[]  = {
 130         {KE_KEY, 0x101, KEY_MUTE},
 131         {KE_KEY, 0x13b, KEY_COFFEE},
 132         {KE_KEY, 0x13c, KEY_BATTERY},
 133         {KE_KEY, 0x13d, KEY_SLEEP},
 134         {KE_KEY, 0x13e, KEY_SUSPEND},
 135         {KE_KEY, 0x13f, KEY_SWITCHVIDEOMODE},
 136         {KE_KEY, 0x140, KEY_BRIGHTNESSDOWN},
 137         {KE_KEY, 0x141, KEY_BRIGHTNESSUP},
 138         {KE_KEY, 0x142, KEY_WLAN},
 139         {KE_KEY, 0x143, KEY_PROG1},
 140         {KE_KEY, 0xb05, KEY_PROG2},
 141         {KE_KEY, 0xb06, KEY_WWW},
 142         {KE_KEY, 0xb07, KEY_MAIL},
 143         {KE_KEY, 0xb30, KEY_STOP},
 144         {KE_KEY, 0xb31, KEY_PREVIOUSSONG},
 145         {KE_KEY, 0xb32, KEY_NEXTSONG},
 146         {KE_KEY, 0xb33, KEY_PLAYPAUSE},
 147         {KE_KEY, 0xb5a, KEY_MEDIA},
 148         {KE_END, 0, 0},
 149 };
 150
 151 /* utility
 152  */
 153
 154 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 155 {
 156         *word = (*word & ~mask) | (mask * value);
 157 }
 158
 159 /* acpi interface wrappers
 160  */
 161
 162 static int is_valid_acpi_path(const char *methodName)
 163 {
 164         acpi_handle handle;
 165         acpi_status status;
 166
 167         status = acpi_get_handle(NULL, (char *)methodName, &handle);
 168         return !ACPI_FAILURE(status);
 169 }
 170
 171 static int write_acpi_int(const char *methodName, int val)
 172 {
 173         struct acpi_object_list params;
 174         union acpi_object in_objs[1];
 175         acpi_status status;
 176
 177         params.count = ARRAY_SIZE(in_objs);
 178         params.pointer = in_objs;
 179         in_objs[0].type = ACPI_TYPE_INTEGER;
 180         in_objs[0].integer.value = val;
 181
 182         status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
 183         return (status == AE_OK);
 184 }
 185
 186 #if 0
 187 static int read_acpi_int(const char *methodName, int *pVal)
 188 {
 189         struct acpi_buffer results;
 190         union acpi_object out_objs[1];
 191         acpi_status status;
 192
 193         results.length = sizeof(out_objs);
 194         results.pointer = out_objs;
 195
 196         status = acpi_evaluate_object(0, (char *)methodName, 0, &results);
 197         *pVal = out_objs[0].integer.value;
 198
 199         return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER);
 200 }
 201 #endif
 202
 203 static const char *method_hci /*= 0*/ ;
 204
 205 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 206  * format.
 207  */
 208 static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 209 {
 210         struct acpi_object_list params;
 211         union acpi_object in_objs[HCI_WORDS];
 212         struct acpi_buffer results;
 213         union acpi_object out_objs[HCI_WORDS + 1];
 214         acpi_status status;
 215         int i;
 216
 217         params.count = HCI_WORDS;
 218         params.pointer = in_objs;
 219         for (i = 0; i < HCI_WORDS; ++i) {
 220                 in_objs[i].type = ACPI_TYPE_INTEGER;
 221                 in_objs[i].integer.value = in[i];
 222         }
 223
 224         results.length = sizeof(out_objs);
 225         results.pointer = out_objs;
 226
 227         status = acpi_evaluate_object(NULL, (char *)method_hci, &params,
 228                                       &results);
 229         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 230                 for (i = 0; i < out_objs->package.count; ++i) {
 231                         out[i] = out_objs->package.elements[i].integer.value;
 232                 }
 233         }
 234
 235         return status;
 236 }
 237
 238 /* common hci tasks (get or set one or two value)
 239  *
 240  * In addition to the ACPI status, the HCI system returns a result which
 241  * may be useful (such as "not supported").
 242  */
 243
 244 static acpi_status hci_write1(u32 reg, u32 in1, u32 * result)
 245 {
 246         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 247         u32 out[HCI_WORDS];
 248         acpi_status status = hci_raw(in, out);
 249         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 250         return status;
 251 }
 252
 253 static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result)
 254 {
 255         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 256         u32 out[HCI_WORDS];
 257         acpi_status status = hci_raw(in, out);
 258         *out1 = out[2];
 259         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 260         return status;
 261 }
 262
 263 static acpi_status hci_write2(u32 reg, u32 in1, u32 in2, u32 *result)
 264 {
 265         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 266         u32 out[HCI_WORDS];
 267         acpi_status status = hci_raw(in, out);
 268         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 269         return status;
 270 }
 271
 272 static acpi_status hci_read2(u32 reg, u32 *out1, u32 *out2, u32 *result)
 273 {
 274         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 275         u32 out[HCI_WORDS];
 276         acpi_status status = hci_raw(in, out);
 277         *out1 = out[2];
 278         *out2 = out[3];
 279         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 280         return status;
 281 }
 282
 283 struct toshiba_acpi_dev {
 284         struct platform_device *p_dev;
 285         struct rfkill *bt_rfk;
 286         struct input_dev *hotkey_dev;
 287         acpi_handle handle;
 288
 289         const char *bt_name;
 290
 291         struct mutex mutex;
 292 };
 293
 294 static struct toshiba_acpi_dev toshiba_acpi = {
 295         .bt_name = "Toshiba Bluetooth",
 296 };
 297
 298 /* Bluetooth rfkill handlers */
 299
 300 static u32 hci_get_bt_present(bool *present)
 301 {
 302         u32 hci_result;
 303         u32 value, value2;
 304
 305         value = 0;
 306         value2 = 0;
 307         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 308         if (hci_result == HCI_SUCCESS)
 309                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 310
 311         return hci_result;
 312 }
 313
 314 static u32 hci_get_radio_state(bool *radio_state)
 315 {
 316         u32 hci_result;
 317         u32 value, value2;
 318
 319         value = 0;
 320         value2 = 0x0001;
 321         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 322
 323         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 324         return hci_result;
 325 }
 326
 327 static int bt_rfkill_set_block(void *data, bool blocked)
 328 {
 329         struct toshiba_acpi_dev *dev = data;
 330         u32 result1, result2;
 331         u32 value;
 332         int err;
 333         bool radio_state;
 334
 335         value = (blocked == false);
 336
 337         mutex_lock(&dev->mutex);
 338         if (hci_get_radio_state(&radio_state) != HCI_SUCCESS) {
 339                 err = -EBUSY;
 340                 goto out;
 341         }
 342
 343         if (!radio_state) {
 344                 err = 0;
 345                 goto out;
 346         }
 347
 348         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 349         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 350
 351         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 352                 err = -EBUSY;
 353         else
 354                 err = 0;
 355  out:
 356         mutex_unlock(&dev->mutex);
 357         return err;
 358 }
 359
 360 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 361 {
 362         bool new_rfk_state;
 363         bool value;
 364         u32 hci_result;
 365         struct toshiba_acpi_dev *dev = data;
 366
 367         mutex_lock(&dev->mutex);
 368
 369         hci_result = hci_get_radio_state(&value);
 370         if (hci_result != HCI_SUCCESS) {
 371                 /* Can't do anything useful */
 372                 mutex_unlock(&dev->mutex);
 373                 return;
 374         }
 375
 376         new_rfk_state = value;
 377
 378         mutex_unlock(&dev->mutex);
 379
 380         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 381                 bt_rfkill_set_block(data, true);
 382 }
 383
 384 static const struct rfkill_ops toshiba_rfk_ops = {
 385         .set_block = bt_rfkill_set_block,
 386         .poll = bt_rfkill_poll,
 387 };
 388
 389 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 390 static struct backlight_device *toshiba_backlight_device;
 391 static int force_fan;
 392 static int last_key_event;
 393 static int key_event_valid;
 394
 395 static int get_lcd(struct backlight_device *bd)
 396 {
 397         u32 hci_result;
 398         u32 value;
 399
 400         hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result);
 401         if (hci_result == HCI_SUCCESS) {
 402                 return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 403         } else
 404                 return -EFAULT;
 405 }
 406
 407 static int lcd_proc_show(struct seq_file *m, void *v)
 408 {
 409         int value = get_lcd(NULL);
 410
 411         if (value >= 0) {
 412                 seq_printf(m, "brightness:              %d\n", value);
 413                 seq_printf(m, "brightness_levels:       %d\n",
 414                              HCI_LCD_BRIGHTNESS_LEVELS);
 415         } else {
 416                 printk(MY_ERR "Error reading LCD brightness\n");
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int lcd_proc_open(struct inode *inode, struct file *file)
 423 {
 424         return single_open(file, lcd_proc_show, NULL);
 425 }
 426
 427 static int set_lcd(int value)
 428 {
 429         u32 hci_result;
 430
 431         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 432         hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result);
 433         if (hci_result != HCI_SUCCESS)
 434                 return -EFAULT;
 435
 436         return 0;
 437 }
 438
 439 static int set_lcd_status(struct backlight_device *bd)
 440 {
 441         return set_lcd(bd->props.brightness);
 442 }
 443
 444 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 445                               size_t count, loff_t *pos)
 446 {
 447         char cmd[42];
 448         size_t len;
 449         int value;
 450         int ret;
 451
 452         len = min(count, sizeof(cmd) - 1);
 453         if (copy_from_user(cmd, buf, len))
 454                 return -EFAULT;
 455         cmd[len] = '\0';
 456
 457         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 458             value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
 459                 ret = set_lcd(value);
 460                 if (ret == 0)
 461                         ret = count;
 462         } else {
 463                 ret = -EINVAL;
 464         }
 465         return ret;
 466 }
 467
 468 static const struct file_operations lcd_proc_fops = {
 469         .owner          = THIS_MODULE,
 470         .open           = lcd_proc_open,
 471         .read           = seq_read,
 472         .llseek         = seq_lseek,
 473         .release        = single_release,
 474         .write          = lcd_proc_write,
 475 };
 476
 477 static int video_proc_show(struct seq_file *m, void *v)
 478 {
 479         u32 hci_result;
 480         u32 value;
 481
 482         hci_read1(HCI_VIDEO_OUT, &value, &hci_result);
 483         if (hci_result == HCI_SUCCESS) {
 484                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 485                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 486                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 487                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 488                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 489                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 490         } else {
 491                 printk(MY_ERR "Error reading video out status\n");
 492         }
 493
 494         return 0;
 495 }
 496
 497 static int video_proc_open(struct inode *inode, struct file *file)
 498 {
 499         return single_open(file, video_proc_show, NULL);
 500 }
 501
 502 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 503                                 size_t count, loff_t *pos)
 504 {
 505         char *cmd, *buffer;
 506         int value;
 507         int remain = count;
 508         int lcd_out = -1;
 509         int crt_out = -1;
 510         int tv_out = -1;
 511         u32 hci_result;
 512         u32 video_out;
 513
 514         cmd = kmalloc(count + 1, GFP_KERNEL);
 515         if (!cmd)
 516                 return -ENOMEM;
 517         if (copy_from_user(cmd, buf, count)) {
 518                 kfree(cmd);
 519                 return -EFAULT;
 520         }
 521         cmd[count] = '\0';
 522
 523         buffer = cmd;
 524
 525         /* scan expression.  Multiple expressions may be delimited with ;
 526          *
 527          *  NOTE: to keep scanning simple, invalid fields are ignored
 528          */
 529         while (remain) {
 530                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 531                         lcd_out = value & 1;
 532                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 533                         crt_out = value & 1;
 534                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 535                         tv_out = value & 1;
 536                 /* advance to one character past the next ; */
 537                 do {
 538                         ++buffer;
 539                         --remain;
 540                 }
 541                 while (remain && *(buffer - 1) != ';');
 542         }
 543
 544         kfree(cmd);
 545
 546         hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
 547         if (hci_result == HCI_SUCCESS) {
 548                 unsigned int new_video_out = video_out;
 549                 if (lcd_out != -1)
 550                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 551                 if (crt_out != -1)
 552                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 553                 if (tv_out != -1)
 554                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 555                 /* To avoid unnecessary video disruption, only write the new
 556                  * video setting if something changed. */
 557                 if (new_video_out != video_out)
 558                         write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 559         } else {
 560                 return -EFAULT;
 561         }
 562
 563         return count;
 564 }
 565
 566 static const struct file_operations video_proc_fops = {
 567         .owner          = THIS_MODULE,
 568         .open           = video_proc_open,
 569         .read           = seq_read,
 570         .llseek         = seq_lseek,
 571         .release        = single_release,
 572         .write          = video_proc_write,
 573 };
 574
 575 static int fan_proc_show(struct seq_file *m, void *v)
 576 {
 577         u32 hci_result;
 578         u32 value;
 579
 580         hci_read1(HCI_FAN, &value, &hci_result);
 581         if (hci_result == HCI_SUCCESS) {
 582                 seq_printf(m, "running:                 %d\n", (value > 0));
 583                 seq_printf(m, "force_on:                %d\n", force_fan);
 584         } else {
 585                 printk(MY_ERR "Error reading fan status\n");
 586         }
 587
 588         return 0;
 589 }
 590
 591 static int fan_proc_open(struct inode *inode, struct file *file)
 592 {
 593         return single_open(file, fan_proc_show, NULL);
 594 }
 595
 596 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
 597                               size_t count, loff_t *pos)
 598 {
 599         char cmd[42];
 600         size_t len;
 601         int value;
 602         u32 hci_result;
 603
 604         len = min(count, sizeof(cmd) - 1);
 605         if (copy_from_user(cmd, buf, len))
 606                 return -EFAULT;
 607         cmd[len] = '\0';
 608
 609         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
 610             value >= 0 && value <= 1) {
 611                 hci_write1(HCI_FAN, value, &hci_result);
 612                 if (hci_result != HCI_SUCCESS)
 613                         return -EFAULT;
 614                 else
 615                         force_fan = value;
 616         } else {
 617                 return -EINVAL;
 618         }
 619
 620         return count;
 621 }
 622
 623 static const struct file_operations fan_proc_fops = {
 624         .owner          = THIS_MODULE,
 625         .open           = fan_proc_open,
 626         .read           = seq_read,
 627         .llseek         = seq_lseek,
 628         .release        = single_release,
 629         .write          = fan_proc_write,
 630 };
 631
 632 static int keys_proc_show(struct seq_file *m, void *v)
 633 {
 634         u32 hci_result;
 635         u32 value;
 636
 637         if (!key_event_valid) {
 638                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 639                 if (hci_result == HCI_SUCCESS) {
 640                         key_event_valid = 1;
 641                         last_key_event = value;
 642                 } else if (hci_result == HCI_EMPTY) {
 643                         /* better luck next time */
 644                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 645                         /* This is a workaround for an unresolved issue on
 646                          * some machines where system events sporadically
 647                          * become disabled. */
 648                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 649                         printk(MY_NOTICE "Re-enabled hotkeys\n");
 650                 } else {
 651                         printk(MY_ERR "Error reading hotkey status\n");
 652                         goto end;
 653                 }
 654         }
 655
 656         seq_printf(m, "hotkey_ready:            %d\n", key_event_valid);
 657         seq_printf(m, "hotkey:                  0x%04x\n", last_key_event);
 658 end:
 659         return 0;
 660 }
 661
 662 static int keys_proc_open(struct inode *inode, struct file *file)
 663 {
 664         return single_open(file, keys_proc_show, NULL);
 665 }
 666
 667 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
 668                                size_t count, loff_t *pos)
 669 {
 670         char cmd[42];
 671         size_t len;
 672         int value;
 673
 674         len = min(count, sizeof(cmd) - 1);
 675         if (copy_from_user(cmd, buf, len))
 676                 return -EFAULT;
 677         cmd[len] = '\0';
 678
 679         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
 680                 key_event_valid = 0;
 681         } else {
 682                 return -EINVAL;
 683         }
 684
 685         return count;
 686 }
 687
 688 static const struct file_operations keys_proc_fops = {
 689         .owner          = THIS_MODULE,
 690         .open           = keys_proc_open,
 691         .read           = seq_read,
 692         .llseek         = seq_lseek,
 693         .release        = single_release,
 694         .write          = keys_proc_write,
 695 };
 696
 697 static int version_proc_show(struct seq_file *m, void *v)
 698 {
 699         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 700         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
 701         return 0;
 702 }
 703
 704 static int version_proc_open(struct inode *inode, struct file *file)
 705 {
 706         return single_open(file, version_proc_show, PDE(inode)->data);
 707 }
 708
 709 static const struct file_operations version_proc_fops = {
 710         .owner          = THIS_MODULE,
 711         .open           = version_proc_open,
 712         .read           = seq_read,
 713         .llseek         = seq_lseek,
 714         .release        = single_release,
 715 };
 716
 717 /* proc and module init
 718  */
 719
 720 #define PROC_TOSHIBA            "toshiba"
 721
 722 static acpi_status __init add_device(void)
 723 {
 724         proc_create("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, &lcd_proc_fops);
 725         proc_create("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, &video_proc_fops);
 726         proc_create("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, &fan_proc_fops);
 727         proc_create("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, &keys_proc_fops);
 728         proc_create("version", S_IRUGO, toshiba_proc_dir, &version_proc_fops);
 729
 730         return AE_OK;
 731 }
 732
 733 static acpi_status remove_device(void)
 734 {
 735         remove_proc_entry("lcd", toshiba_proc_dir);
 736         remove_proc_entry("video", toshiba_proc_dir);
 737         remove_proc_entry("fan", toshiba_proc_dir);
 738         remove_proc_entry("keys", toshiba_proc_dir);
 739         remove_proc_entry("version", toshiba_proc_dir);
 740         return AE_OK;
 741 }
 742
 743 static struct backlight_ops toshiba_backlight_data = {
 744         .get_brightness = get_lcd,
 745         .update_status  = set_lcd_status,
 746 };
 747
 748 static struct key_entry *toshiba_acpi_get_entry_by_scancode(int code)
 749 {
 750         struct key_entry *key;
 751
 752         for (key = toshiba_acpi_keymap; key->type != KE_END; key++)
 753                 if (code == key->code)
 754                         return key;
 755
 756         return NULL;
 757 }
 758
 759 static struct key_entry *toshiba_acpi_get_entry_by_keycode(int code)
 760 {
 761         struct key_entry *key;
 762
 763         for (key = toshiba_acpi_keymap; key->type != KE_END; key++)
 764                 if (code == key->keycode && key->type == KE_KEY)
 765                         return key;
 766
 767         return NULL;
 768 }
 769
 770 static int toshiba_acpi_getkeycode(struct input_dev *dev, int scancode,
 771                                    int *keycode)
 772 {
 773         struct key_entry *key = toshiba_acpi_get_entry_by_scancode(scancode);
 774
 775         if (key && key->type == KE_KEY) {
 776                 *keycode = key->keycode;
 777                 return 0;
 778         }
 779
 780         return -EINVAL;
 781 }
 782
 783 static int toshiba_acpi_setkeycode(struct input_dev *dev, int scancode,
 784                                    int keycode)
 785 {
 786         struct key_entry *key;
 787         int old_keycode;
 788
 789         if (keycode < 0 || keycode > KEY_MAX)
 790                 return -EINVAL;
 791
 792         key = toshiba_acpi_get_entry_by_scancode(scancode);
 793         if (key && key->type == KE_KEY) {
 794                 old_keycode = key->keycode;
 795                 key->keycode = keycode;
 796                 set_bit(keycode, dev->keybit);
 797                 if (!toshiba_acpi_get_entry_by_keycode(old_keycode))
 798                         clear_bit(old_keycode, dev->keybit);
 799                 return 0;
 800         }
 801
 802         return -EINVAL;
 803 }
 804
 805 static void toshiba_acpi_notify(acpi_handle handle, u32 event, void *context)
 806 {
 807         u32 hci_result, value;
 808         struct key_entry *key;
 809
 810         if (event != 0x80)
 811                 return;
 812         do {
 813                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 814                 if (hci_result == HCI_SUCCESS) {
 815                         if (value == 0x100)
 816                                 continue;
 817                         /* act on key press; ignore key release */
 818                         if (value & 0x80)
 819                                 continue;
 820
 821                         key = toshiba_acpi_get_entry_by_scancode
 822                                 (value);
 823                         if (!key) {
 824                                 printk(MY_INFO "Unknown key %x\n",
 825                                        value);
 826                                 continue;
 827                         }
 828                         input_report_key(toshiba_acpi.hotkey_dev,
 829                                          key->keycode, 1);
 830                         input_sync(toshiba_acpi.hotkey_dev);
 831                         input_report_key(toshiba_acpi.hotkey_dev,
 832                                          key->keycode, 0);
 833                         input_sync(toshiba_acpi.hotkey_dev);
 834                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 835                         /* This is a workaround for an unresolved issue on
 836                          * some machines where system events sporadically
 837                          * become disabled. */
 838                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 839                         printk(MY_NOTICE "Re-enabled hotkeys\n");
 840                 }
 841         } while (hci_result != HCI_EMPTY);
 842 }
 843
 844 static int toshiba_acpi_setup_keyboard(char *device)
 845 {
 846         acpi_status status;
 847         acpi_handle handle;
 848         int result;
 849         const struct key_entry *key;
 850
 851         status = acpi_get_handle(NULL, device, &handle);
 852         if (ACPI_FAILURE(status)) {
 853                 printk(MY_INFO "Unable to get notification device\n");
 854                 return -ENODEV;
 855         }
 856
 857         toshiba_acpi.handle = handle;
 858
 859         status = acpi_evaluate_object(handle, "ENAB", NULL, NULL);
 860         if (ACPI_FAILURE(status)) {
 861                 printk(MY_INFO "Unable to enable hotkeys\n");
 862                 return -ENODEV;
 863         }
 864
 865         status = acpi_install_notify_handler(handle, ACPI_DEVICE_NOTIFY,
 866                                               toshiba_acpi_notify, NULL);
 867         if (ACPI_FAILURE(status)) {
 868                 printk(MY_INFO "Unable to install hotkey notification\n");
 869                 return -ENODEV;
 870         }
 871
 872         toshiba_acpi.hotkey_dev = input_allocate_device();
 873         if (!toshiba_acpi.hotkey_dev) {
 874                 printk(MY_INFO "Unable to register input device\n");
 875                 return -ENOMEM;
 876         }
 877
 878         toshiba_acpi.hotkey_dev->name = "Toshiba input device";
 879         toshiba_acpi.hotkey_dev->phys = device;
 880         toshiba_acpi.hotkey_dev->id.bustype = BUS_HOST;
 881         toshiba_acpi.hotkey_dev->getkeycode = toshiba_acpi_getkeycode;
 882         toshiba_acpi.hotkey_dev->setkeycode = toshiba_acpi_setkeycode;
 883
 884         for (key = toshiba_acpi_keymap; key->type != KE_END; key++) {
 885                 set_bit(EV_KEY, toshiba_acpi.hotkey_dev->evbit);
 886                 set_bit(key->keycode, toshiba_acpi.hotkey_dev->keybit);
 887         }
 888
 889         result = input_register_device(toshiba_acpi.hotkey_dev);
 890         if (result) {
 891                 printk(MY_INFO "Unable to register input device\n");
 892                 return result;
 893         }
 894
 895         return 0;
 896 }
 897
 898 static void toshiba_acpi_exit(void)
 899 {
 900         if (toshiba_acpi.hotkey_dev)
 901                 input_unregister_device(toshiba_acpi.hotkey_dev);
 902
 903         if (toshiba_acpi.bt_rfk) {
 904                 rfkill_unregister(toshiba_acpi.bt_rfk);
 905                 rfkill_destroy(toshiba_acpi.bt_rfk);
 906         }
 907
 908         if (toshiba_backlight_device)
 909                 backlight_device_unregister(toshiba_backlight_device);
 910
 911         remove_device();
 912
 913         if (toshiba_proc_dir)
 914                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
 915
 916         acpi_remove_notify_handler(toshiba_acpi.handle, ACPI_DEVICE_NOTIFY,
 917                                    toshiba_acpi_notify);
 918
 919         platform_device_unregister(toshiba_acpi.p_dev);
 920
 921         return;
 922 }
 923
 924 static int __init toshiba_acpi_init(void)
 925 {
 926         acpi_status status = AE_OK;
 927         u32 hci_result;
 928         bool bt_present;
 929         int ret = 0;
 930
 931         if (acpi_disabled)
 932                 return -ENODEV;
 933
 934         /* simple device detection: look for HCI method */
 935         if (is_valid_acpi_path(TOSH_INTERFACE_1 GHCI_METHOD)) {
 936                 method_hci = TOSH_INTERFACE_1 GHCI_METHOD;
 937                 if (toshiba_acpi_setup_keyboard(TOSH_INTERFACE_1))
 938                         printk(MY_INFO "Unable to activate hotkeys\n");
 939         } else if (is_valid_acpi_path(TOSH_INTERFACE_2 GHCI_METHOD)) {
 940                 method_hci = TOSH_INTERFACE_2 GHCI_METHOD;
 941                 if (toshiba_acpi_setup_keyboard(TOSH_INTERFACE_2))
 942                         printk(MY_INFO "Unable to activate hotkeys\n");
 943         } else
 944                 return -ENODEV;
 945
 946         printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n",
 947                TOSHIBA_ACPI_VERSION);
 948         printk(MY_INFO "    HCI method: %s\n", method_hci);
 949
 950         mutex_init(&toshiba_acpi.mutex);
 951
 952         toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi",
 953                                                               -1, NULL, 0);
 954         if (IS_ERR(toshiba_acpi.p_dev)) {
 955                 ret = PTR_ERR(toshiba_acpi.p_dev);
 956                 printk(MY_ERR "unable to register platform device\n");
 957                 toshiba_acpi.p_dev = NULL;
 958                 toshiba_acpi_exit();
 959                 return ret;
 960         }
 961
 962         force_fan = 0;
 963         key_event_valid = 0;
 964
 965         /* enable event fifo */
 966         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 967
 968         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
 969         if (!toshiba_proc_dir) {
 970                 toshiba_acpi_exit();
 971                 return -ENODEV;
 972         } else {
 973                 status = add_device();
 974                 if (ACPI_FAILURE(status)) {
 975                         toshiba_acpi_exit();
 976                         return -ENODEV;
 977                 }
 978         }
 979
 980         toshiba_backlight_device = backlight_device_register("toshiba",
 981                                                 &toshiba_acpi.p_dev->dev,
 982                                                 NULL,
 983                                                 &toshiba_backlight_data);
 984         if (IS_ERR(toshiba_backlight_device)) {
 985                 ret = PTR_ERR(toshiba_backlight_device);
 986
 987                 printk(KERN_ERR "Could not register toshiba backlight device\n");
 988                 toshiba_backlight_device = NULL;
 989                 toshiba_acpi_exit();
 990                 return ret;
 991         }
 992         toshiba_backlight_device->props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
 993
 994         /* Register rfkill switch for Bluetooth */
 995         if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) {
 996                 toshiba_acpi.bt_rfk = rfkill_alloc(toshiba_acpi.bt_name,
 997                                                    &toshiba_acpi.p_dev->dev,
 998                                                    RFKILL_TYPE_BLUETOOTH,
 999                                                    &toshiba_rfk_ops,
1000                                                    &toshiba_acpi);
1001                 if (!toshiba_acpi.bt_rfk) {
1002                         printk(MY_ERR "unable to allocate rfkill device\n");
1003                         toshiba_acpi_exit();
1004                         return -ENOMEM;
1005                 }
1006
1007                 ret = rfkill_register(toshiba_acpi.bt_rfk);
1008                 if (ret) {
1009                         printk(MY_ERR "unable to register rfkill device\n");
1010                         rfkill_destroy(toshiba_acpi.bt_rfk);
1011                         toshiba_acpi_exit();
1012                         return ret;
1013                 }
1014         }
1015
1016         return 0;
1017 }
1018
1019 module_init(toshiba_acpi_init);
1020 module_exit(toshiba_acpi_exit);