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/backlight.h>
  46 #include <linux/platform_device.h>
  47 #include <linux/rfkill.h>
  48 #include <linux/input-polldev.h>
  49
  50 #include <asm/uaccess.h>
  51
  52 #include <acpi/acpi_drivers.h>
  53
  54 MODULE_AUTHOR("John Belmonte");
  55 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  56 MODULE_LICENSE("GPL");
  57
  58 #define MY_LOGPREFIX "toshiba_acpi: "
  59 #define MY_ERR KERN_ERR MY_LOGPREFIX
  60 #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX
  61 #define MY_INFO KERN_INFO MY_LOGPREFIX
  62
  63 /* Toshiba ACPI method paths */
  64 #define METHOD_LCD_BRIGHTNESS   "\\_SB_.PCI0.VGA_.LCD_._BCM"
  65 #define METHOD_HCI_1            "\\_SB_.VALD.GHCI"
  66 #define METHOD_HCI_2            "\\_SB_.VALZ.GHCI"
  67 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  68
  69 /* Toshiba HCI interface definitions
  70  *
  71  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  72  * be uniform across all their models.  Ideally we would just call
  73  * dedicated ACPI methods instead of using this primitive interface.
  74  * However the ACPI methods seem to be incomplete in some areas (for
  75  * example they allow setting, but not reading, the LCD brightness value),
  76  * so this is still useful.
  77  */
  78
  79 #define HCI_WORDS                       6
  80
  81 /* operations */
  82 #define HCI_SET                         0xff00
  83 #define HCI_GET                         0xfe00
  84
  85 /* return codes */
  86 #define HCI_SUCCESS                     0x0000
  87 #define HCI_FAILURE                     0x1000
  88 #define HCI_NOT_SUPPORTED               0x8000
  89 #define HCI_EMPTY                       0x8c00
  90
  91 /* registers */
  92 #define HCI_FAN                         0x0004
  93 #define HCI_SYSTEM_EVENT                0x0016
  94 #define HCI_VIDEO_OUT                   0x001c
  95 #define HCI_HOTKEY_EVENT                0x001e
  96 #define HCI_LCD_BRIGHTNESS              0x002a
  97 #define HCI_WIRELESS                    0x0056
  98
  99 /* field definitions */
 100 #define HCI_LCD_BRIGHTNESS_BITS         3
 101 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 102 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 103 #define HCI_VIDEO_OUT_LCD               0x1
 104 #define HCI_VIDEO_OUT_CRT               0x2
 105 #define HCI_VIDEO_OUT_TV                0x4
 106 #define HCI_WIRELESS_KILL_SWITCH        0x01
 107 #define HCI_WIRELESS_BT_PRESENT         0x0f
 108 #define HCI_WIRELESS_BT_ATTACH          0x40
 109 #define HCI_WIRELESS_BT_POWER           0x80
 110
 111 static const struct acpi_device_id toshiba_device_ids[] = {
 112         {"TOS6200", 0},
 113         {"TOS6208", 0},
 114         {"TOS1900", 0},
 115         {"", 0},
 116 };
 117 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 118
 119 /* utility
 120  */
 121
 122 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 123 {
 124         *word = (*word & ~mask) | (mask * value);
 125 }
 126
 127 /* acpi interface wrappers
 128  */
 129
 130 static int is_valid_acpi_path(const char *methodName)
 131 {
 132         acpi_handle handle;
 133         acpi_status status;
 134
 135         status = acpi_get_handle(NULL, (char *)methodName, &handle);
 136         return !ACPI_FAILURE(status);
 137 }
 138
 139 static int write_acpi_int(const char *methodName, int val)
 140 {
 141         struct acpi_object_list params;
 142         union acpi_object in_objs[1];
 143         acpi_status status;
 144
 145         params.count = ARRAY_SIZE(in_objs);
 146         params.pointer = in_objs;
 147         in_objs[0].type = ACPI_TYPE_INTEGER;
 148         in_objs[0].integer.value = val;
 149
 150         status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
 151         return (status == AE_OK);
 152 }
 153
 154 #if 0
 155 static int read_acpi_int(const char *methodName, int *pVal)
 156 {
 157         struct acpi_buffer results;
 158         union acpi_object out_objs[1];
 159         acpi_status status;
 160
 161         results.length = sizeof(out_objs);
 162         results.pointer = out_objs;
 163
 164         status = acpi_evaluate_object(0, (char *)methodName, 0, &results);
 165         *pVal = out_objs[0].integer.value;
 166
 167         return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER);
 168 }
 169 #endif
 170
 171 static const char *method_hci /*= 0*/ ;
 172
 173 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 174  * format.
 175  */
 176 static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 177 {
 178         struct acpi_object_list params;
 179         union acpi_object in_objs[HCI_WORDS];
 180         struct acpi_buffer results;
 181         union acpi_object out_objs[HCI_WORDS + 1];
 182         acpi_status status;
 183         int i;
 184
 185         params.count = HCI_WORDS;
 186         params.pointer = in_objs;
 187         for (i = 0; i < HCI_WORDS; ++i) {
 188                 in_objs[i].type = ACPI_TYPE_INTEGER;
 189                 in_objs[i].integer.value = in[i];
 190         }
 191
 192         results.length = sizeof(out_objs);
 193         results.pointer = out_objs;
 194
 195         status = acpi_evaluate_object(NULL, (char *)method_hci, &params,
 196                                       &results);
 197         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 198                 for (i = 0; i < out_objs->package.count; ++i) {
 199                         out[i] = out_objs->package.elements[i].integer.value;
 200                 }
 201         }
 202
 203         return status;
 204 }
 205
 206 /* common hci tasks (get or set one or two value)
 207  *
 208  * In addition to the ACPI status, the HCI system returns a result which
 209  * may be useful (such as "not supported").
 210  */
 211
 212 static acpi_status hci_write1(u32 reg, u32 in1, u32 * result)
 213 {
 214         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 215         u32 out[HCI_WORDS];
 216         acpi_status status = hci_raw(in, out);
 217         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 218         return status;
 219 }
 220
 221 static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result)
 222 {
 223         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 224         u32 out[HCI_WORDS];
 225         acpi_status status = hci_raw(in, out);
 226         *out1 = out[2];
 227         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 228         return status;
 229 }
 230
 231 static acpi_status hci_write2(u32 reg, u32 in1, u32 in2, u32 *result)
 232 {
 233         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 234         u32 out[HCI_WORDS];
 235         acpi_status status = hci_raw(in, out);
 236         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 237         return status;
 238 }
 239
 240 static acpi_status hci_read2(u32 reg, u32 *out1, u32 *out2, u32 *result)
 241 {
 242         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 243         u32 out[HCI_WORDS];
 244         acpi_status status = hci_raw(in, out);
 245         *out1 = out[2];
 246         *out2 = out[3];
 247         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 248         return status;
 249 }
 250
 251 struct toshiba_acpi_dev {
 252         struct platform_device *p_dev;
 253         struct rfkill *rfk_dev;
 254         struct input_polled_dev *poll_dev;
 255
 256         const char *bt_name;
 257         const char *rfk_name;
 258
 259         bool last_rfk_state;
 260
 261         struct mutex mutex;
 262 };
 263
 264 static struct toshiba_acpi_dev toshiba_acpi = {
 265         .bt_name = "Toshiba Bluetooth",
 266         .rfk_name = "Toshiba RFKill Switch",
 267         .last_rfk_state = false,
 268 };
 269
 270 /* Bluetooth rfkill handlers */
 271
 272 static u32 hci_get_bt_present(bool *present)
 273 {
 274         u32 hci_result;
 275         u32 value, value2;
 276
 277         value = 0;
 278         value2 = 0;
 279         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 280         if (hci_result == HCI_SUCCESS)
 281                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 282
 283         return hci_result;
 284 }
 285
 286 static u32 hci_get_bt_on(bool *on)
 287 {
 288         u32 hci_result;
 289         u32 value, value2;
 290
 291         value = 0;
 292         value2 = 0x0001;
 293         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 294         if (hci_result == HCI_SUCCESS)
 295                 *on = (value & HCI_WIRELESS_BT_POWER) &&
 296                       (value & HCI_WIRELESS_BT_ATTACH);
 297
 298         return hci_result;
 299 }
 300
 301 static u32 hci_get_radio_state(bool *radio_state)
 302 {
 303         u32 hci_result;
 304         u32 value, value2;
 305
 306         value = 0;
 307         value2 = 0x0001;
 308         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 309
 310         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 311         return hci_result;
 312 }
 313
 314 static int bt_rfkill_toggle_radio(void *data, enum rfkill_state state)
 315 {
 316         u32 result1, result2;
 317         u32 value;
 318         bool radio_state;
 319         struct toshiba_acpi_dev *dev = data;
 320
 321         value = (state == RFKILL_STATE_UNBLOCKED);
 322
 323         if (hci_get_radio_state(&radio_state) != HCI_SUCCESS)
 324                 return -EFAULT;
 325
 326         switch (state) {
 327         case RFKILL_STATE_UNBLOCKED:
 328                 if (!radio_state)
 329                         return -EPERM;
 330                 break;
 331         case RFKILL_STATE_SOFT_BLOCKED:
 332                 break;
 333         default:
 334                 return -EINVAL;
 335         }
 336
 337         mutex_lock(&dev->mutex);
 338         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 339         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 340         mutex_unlock(&dev->mutex);
 341
 342         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 343                 return -EFAULT;
 344
 345         return 0;
 346 }
 347
 348 static void bt_poll_rfkill(struct input_polled_dev *poll_dev)
 349 {
 350         bool state_changed;
 351         bool new_rfk_state;
 352         bool value;
 353         u32 hci_result;
 354         struct toshiba_acpi_dev *dev = poll_dev->private;
 355
 356         hci_result = hci_get_radio_state(&value);
 357         if (hci_result != HCI_SUCCESS)
 358                 return; /* Can't do anything useful */
 359
 360         new_rfk_state = value;
 361
 362         mutex_lock(&dev->mutex);
 363         state_changed = new_rfk_state != dev->last_rfk_state;
 364         dev->last_rfk_state = new_rfk_state;
 365         mutex_unlock(&dev->mutex);
 366
 367         if (unlikely(state_changed)) {
 368                 rfkill_force_state(dev->rfk_dev,
 369                                    new_rfk_state ?
 370                                    RFKILL_STATE_SOFT_BLOCKED :
 371                                    RFKILL_STATE_HARD_BLOCKED);
 372                 input_report_switch(poll_dev->input, SW_RFKILL_ALL,
 373                                     new_rfk_state);
 374                 input_sync(poll_dev->input);
 375         }
 376 }
 377
 378 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 379 static struct backlight_device *toshiba_backlight_device;
 380 static int force_fan;
 381 static int last_key_event;
 382 static int key_event_valid;
 383
 384 typedef struct _ProcItem {
 385         const char *name;
 386         char *(*read_func) (char *);
 387         unsigned long (*write_func) (const char *, unsigned long);
 388 } ProcItem;
 389
 390 /* proc file handlers
 391  */
 392
 393 static int
 394 dispatch_read(char *page, char **start, off_t off, int count, int *eof,
 395               ProcItem * item)
 396 {
 397         char *p = page;
 398         int len;
 399
 400         if (off == 0)
 401                 p = item->read_func(p);
 402
 403         /* ISSUE: I don't understand this code */
 404         len = (p - page);
 405         if (len <= off + count)
 406                 *eof = 1;
 407         *start = page + off;
 408         len -= off;
 409         if (len > count)
 410                 len = count;
 411         if (len < 0)
 412                 len = 0;
 413         return len;
 414 }
 415
 416 static int
 417 dispatch_write(struct file *file, const char __user * buffer,
 418                unsigned long count, ProcItem * item)
 419 {
 420         int result;
 421         char *tmp_buffer;
 422
 423         /* Arg buffer points to userspace memory, which can't be accessed
 424          * directly.  Since we're making a copy, zero-terminate the
 425          * destination so that sscanf can be used on it safely.
 426          */
 427         tmp_buffer = kmalloc(count + 1, GFP_KERNEL);
 428         if (!tmp_buffer)
 429                 return -ENOMEM;
 430
 431         if (copy_from_user(tmp_buffer, buffer, count)) {
 432                 result = -EFAULT;
 433         } else {
 434                 tmp_buffer[count] = 0;
 435                 result = item->write_func(tmp_buffer, count);
 436         }
 437         kfree(tmp_buffer);
 438         return result;
 439 }
 440
 441 static int get_lcd(struct backlight_device *bd)
 442 {
 443         u32 hci_result;
 444         u32 value;
 445
 446         hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result);
 447         if (hci_result == HCI_SUCCESS) {
 448                 return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 449         } else
 450                 return -EFAULT;
 451 }
 452
 453 static char *read_lcd(char *p)
 454 {
 455         int value = get_lcd(NULL);
 456
 457         if (value >= 0) {
 458                 p += sprintf(p, "brightness:              %d\n", value);
 459                 p += sprintf(p, "brightness_levels:       %d\n",
 460                              HCI_LCD_BRIGHTNESS_LEVELS);
 461         } else {
 462                 printk(MY_ERR "Error reading LCD brightness\n");
 463         }
 464
 465         return p;
 466 }
 467
 468 static int set_lcd(int value)
 469 {
 470         u32 hci_result;
 471
 472         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 473         hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result);
 474         if (hci_result != HCI_SUCCESS)
 475                 return -EFAULT;
 476
 477         return 0;
 478 }
 479
 480 static int set_lcd_status(struct backlight_device *bd)
 481 {
 482         return set_lcd(bd->props.brightness);
 483 }
 484
 485 static unsigned long write_lcd(const char *buffer, unsigned long count)
 486 {
 487         int value;
 488         int ret;
 489
 490         if (sscanf(buffer, " brightness : %i", &value) == 1 &&
 491             value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
 492                 ret = set_lcd(value);
 493                 if (ret == 0)
 494                         ret = count;
 495         } else {
 496                 ret = -EINVAL;
 497         }
 498         return ret;
 499 }
 500
 501 static char *read_video(char *p)
 502 {
 503         u32 hci_result;
 504         u32 value;
 505
 506         hci_read1(HCI_VIDEO_OUT, &value, &hci_result);
 507         if (hci_result == HCI_SUCCESS) {
 508                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 509                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 510                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 511                 p += sprintf(p, "lcd_out:                 %d\n", is_lcd);
 512                 p += sprintf(p, "crt_out:                 %d\n", is_crt);
 513                 p += sprintf(p, "tv_out:                  %d\n", is_tv);
 514         } else {
 515                 printk(MY_ERR "Error reading video out status\n");
 516         }
 517
 518         return p;
 519 }
 520
 521 static unsigned long write_video(const char *buffer, unsigned long count)
 522 {
 523         int value;
 524         int remain = count;
 525         int lcd_out = -1;
 526         int crt_out = -1;
 527         int tv_out = -1;
 528         u32 hci_result;
 529         u32 video_out;
 530
 531         /* scan expression.  Multiple expressions may be delimited with ;
 532          *
 533          *  NOTE: to keep scanning simple, invalid fields are ignored
 534          */
 535         while (remain) {
 536                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 537                         lcd_out = value & 1;
 538                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 539                         crt_out = value & 1;
 540                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 541                         tv_out = value & 1;
 542                 /* advance to one character past the next ; */
 543                 do {
 544                         ++buffer;
 545                         --remain;
 546                 }
 547                 while (remain && *(buffer - 1) != ';');
 548         }
 549
 550         hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
 551         if (hci_result == HCI_SUCCESS) {
 552                 unsigned int new_video_out = video_out;
 553                 if (lcd_out != -1)
 554                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 555                 if (crt_out != -1)
 556                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 557                 if (tv_out != -1)
 558                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 559                 /* To avoid unnecessary video disruption, only write the new
 560                  * video setting if something changed. */
 561                 if (new_video_out != video_out)
 562                         write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 563         } else {
 564                 return -EFAULT;
 565         }
 566
 567         return count;
 568 }
 569
 570 static char *read_fan(char *p)
 571 {
 572         u32 hci_result;
 573         u32 value;
 574
 575         hci_read1(HCI_FAN, &value, &hci_result);
 576         if (hci_result == HCI_SUCCESS) {
 577                 p += sprintf(p, "running:                 %d\n", (value > 0));
 578                 p += sprintf(p, "force_on:                %d\n", force_fan);
 579         } else {
 580                 printk(MY_ERR "Error reading fan status\n");
 581         }
 582
 583         return p;
 584 }
 585
 586 static unsigned long write_fan(const char *buffer, unsigned long count)
 587 {
 588         int value;
 589         u32 hci_result;
 590
 591         if (sscanf(buffer, " force_on : %i", &value) == 1 &&
 592             value >= 0 && value <= 1) {
 593                 hci_write1(HCI_FAN, value, &hci_result);
 594                 if (hci_result != HCI_SUCCESS)
 595                         return -EFAULT;
 596                 else
 597                         force_fan = value;
 598         } else {
 599                 return -EINVAL;
 600         }
 601
 602         return count;
 603 }
 604
 605 static char *read_keys(char *p)
 606 {
 607         u32 hci_result;
 608         u32 value;
 609
 610         if (!key_event_valid) {
 611                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 612                 if (hci_result == HCI_SUCCESS) {
 613                         key_event_valid = 1;
 614                         last_key_event = value;
 615                 } else if (hci_result == HCI_EMPTY) {
 616                         /* better luck next time */
 617                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 618                         /* This is a workaround for an unresolved issue on
 619                          * some machines where system events sporadically
 620                          * become disabled. */
 621                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 622                         printk(MY_NOTICE "Re-enabled hotkeys\n");
 623                 } else {
 624                         printk(MY_ERR "Error reading hotkey status\n");
 625                         goto end;
 626                 }
 627         }
 628
 629         p += sprintf(p, "hotkey_ready:            %d\n", key_event_valid);
 630         p += sprintf(p, "hotkey:                  0x%04x\n", last_key_event);
 631
 632       end:
 633         return p;
 634 }
 635
 636 static unsigned long write_keys(const char *buffer, unsigned long count)
 637 {
 638         int value;
 639
 640         if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && value == 0) {
 641                 key_event_valid = 0;
 642         } else {
 643                 return -EINVAL;
 644         }
 645
 646         return count;
 647 }
 648
 649 static char *read_version(char *p)
 650 {
 651         p += sprintf(p, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 652         p += sprintf(p, "proc_interface:          %d\n",
 653                      PROC_INTERFACE_VERSION);
 654         return p;
 655 }
 656
 657 /* proc and module init
 658  */
 659
 660 #define PROC_TOSHIBA            "toshiba"
 661
 662 static ProcItem proc_items[] = {
 663         {"lcd", read_lcd, write_lcd},
 664         {"video", read_video, write_video},
 665         {"fan", read_fan, write_fan},
 666         {"keys", read_keys, write_keys},
 667         {"version", read_version, NULL},
 668         {NULL}
 669 };
 670
 671 static acpi_status __init add_device(void)
 672 {
 673         struct proc_dir_entry *proc;
 674         ProcItem *item;
 675
 676         for (item = proc_items; item->name; ++item) {
 677                 proc = create_proc_read_entry(item->name,
 678                                               S_IFREG | S_IRUGO | S_IWUSR,
 679                                               toshiba_proc_dir,
 680                                               (read_proc_t *) dispatch_read,
 681                                               item);
 682                 if (proc && item->write_func)
 683                         proc->write_proc = (write_proc_t *) dispatch_write;
 684         }
 685
 686         return AE_OK;
 687 }
 688
 689 static acpi_status remove_device(void)
 690 {
 691         ProcItem *item;
 692
 693         for (item = proc_items; item->name; ++item)
 694                 remove_proc_entry(item->name, toshiba_proc_dir);
 695         return AE_OK;
 696 }
 697
 698 static struct backlight_ops toshiba_backlight_data = {
 699         .get_brightness = get_lcd,
 700         .update_status  = set_lcd_status,
 701 };
 702
 703 static void toshiba_acpi_exit(void)
 704 {
 705         if (toshiba_acpi.poll_dev) {
 706                 input_unregister_polled_device(toshiba_acpi.poll_dev);
 707                 input_free_polled_device(toshiba_acpi.poll_dev);
 708         }
 709
 710         if (toshiba_acpi.rfk_dev)
 711                 rfkill_unregister(toshiba_acpi.rfk_dev);
 712
 713         if (toshiba_backlight_device)
 714                 backlight_device_unregister(toshiba_backlight_device);
 715
 716         remove_device();
 717
 718         if (toshiba_proc_dir)
 719                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
 720
 721         platform_device_unregister(toshiba_acpi.p_dev);
 722
 723         return;
 724 }
 725
 726 static int __init toshiba_acpi_init(void)
 727 {
 728         acpi_status status = AE_OK;
 729         u32 hci_result;
 730         bool bt_present;
 731         bool bt_on;
 732         bool radio_on;
 733         int ret = 0;
 734
 735         if (acpi_disabled)
 736                 return -ENODEV;
 737
 738         /* simple device detection: look for HCI method */
 739         if (is_valid_acpi_path(METHOD_HCI_1))
 740                 method_hci = METHOD_HCI_1;
 741         else if (is_valid_acpi_path(METHOD_HCI_2))
 742                 method_hci = METHOD_HCI_2;
 743         else
 744                 return -ENODEV;
 745
 746         printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n",
 747                TOSHIBA_ACPI_VERSION);
 748         printk(MY_INFO "    HCI method: %s\n", method_hci);
 749
 750         mutex_init(&toshiba_acpi.mutex);
 751
 752         toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi",
 753                                                               -1, NULL, 0);
 754         if (IS_ERR(toshiba_acpi.p_dev)) {
 755                 ret = PTR_ERR(toshiba_acpi.p_dev);
 756                 printk(MY_ERR "unable to register platform device\n");
 757                 toshiba_acpi.p_dev = NULL;
 758                 toshiba_acpi_exit();
 759                 return ret;
 760         }
 761
 762         force_fan = 0;
 763         key_event_valid = 0;
 764
 765         /* enable event fifo */
 766         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 767
 768         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
 769         if (!toshiba_proc_dir) {
 770                 toshiba_acpi_exit();
 771                 return -ENODEV;
 772         } else {
 773                 status = add_device();
 774                 if (ACPI_FAILURE(status)) {
 775                         toshiba_acpi_exit();
 776                         return -ENODEV;
 777                 }
 778         }
 779
 780         toshiba_backlight_device = backlight_device_register("toshiba",
 781                                                 &toshiba_acpi.p_dev->dev,
 782                                                 NULL,
 783                                                 &toshiba_backlight_data);
 784         if (IS_ERR(toshiba_backlight_device)) {
 785                 ret = PTR_ERR(toshiba_backlight_device);
 786
 787                 printk(KERN_ERR "Could not register toshiba backlight device\n");
 788                 toshiba_backlight_device = NULL;
 789                 toshiba_acpi_exit();
 790                 return ret;
 791         }
 792         toshiba_backlight_device->props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
 793
 794         /* Register rfkill switch for Bluetooth */
 795         if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) {
 796                 toshiba_acpi.rfk_dev = rfkill_allocate(&toshiba_acpi.p_dev->dev,
 797                                                         RFKILL_TYPE_BLUETOOTH);
 798                 if (!toshiba_acpi.rfk_dev) {
 799                         printk(MY_ERR "unable to allocate rfkill device\n");
 800                         toshiba_acpi_exit();
 801                         return -ENOMEM;
 802                 }
 803
 804                 toshiba_acpi.rfk_dev->name = toshiba_acpi.bt_name;
 805                 toshiba_acpi.rfk_dev->toggle_radio = bt_rfkill_toggle_radio;
 806                 toshiba_acpi.rfk_dev->user_claim_unsupported = 1;
 807                 toshiba_acpi.rfk_dev->data = &toshiba_acpi;
 808
 809                 if (hci_get_bt_on(&bt_on) == HCI_SUCCESS && bt_on) {
 810                         toshiba_acpi.rfk_dev->state = RFKILL_STATE_UNBLOCKED;
 811                 } else if (hci_get_radio_state(&radio_on) == HCI_SUCCESS &&
 812                            radio_on) {
 813                         toshiba_acpi.rfk_dev->state = RFKILL_STATE_SOFT_BLOCKED;
 814                 } else {
 815                         toshiba_acpi.rfk_dev->state = RFKILL_STATE_HARD_BLOCKED;
 816                 }
 817
 818                 ret = rfkill_register(toshiba_acpi.rfk_dev);
 819                 if (ret) {
 820                         printk(MY_ERR "unable to register rfkill device\n");
 821                         toshiba_acpi_exit();
 822                         return -ENOMEM;
 823                 }
 824
 825                 /* Register input device for kill switch */
 826                 toshiba_acpi.poll_dev = input_allocate_polled_device();
 827                 if (!toshiba_acpi.poll_dev) {
 828                         printk(MY_ERR
 829                                "unable to allocate kill-switch input device\n");
 830                         toshiba_acpi_exit();
 831                         return -ENOMEM;
 832                 }
 833                 toshiba_acpi.poll_dev->private = &toshiba_acpi;
 834                 toshiba_acpi.poll_dev->poll = bt_poll_rfkill;
 835                 toshiba_acpi.poll_dev->poll_interval = 1000; /* msecs */
 836
 837                 toshiba_acpi.poll_dev->input->name = toshiba_acpi.rfk_name;
 838                 toshiba_acpi.poll_dev->input->id.bustype = BUS_HOST;
 839                 /* Toshiba USB ID */
 840                 toshiba_acpi.poll_dev->input->id.vendor = 0x0930;
 841                 set_bit(EV_SW, toshiba_acpi.poll_dev->input->evbit);
 842                 set_bit(SW_RFKILL_ALL, toshiba_acpi.poll_dev->input->swbit);
 843                 input_report_switch(toshiba_acpi.poll_dev->input,
 844                                     SW_RFKILL_ALL, TRUE);
 845                 input_sync(toshiba_acpi.poll_dev->input);
 846
 847                 ret = input_register_polled_device(toshiba_acpi.poll_dev);
 848                 if (ret) {
 849                         printk(MY_ERR
 850                                "unable to register kill-switch input device\n");
 851                         toshiba_acpi_exit();
 852                         return ret;
 853                 }
 854         }
 855
 856         return 0;
 857 }
 858
 859 module_init(toshiba_acpi_init);
 860 module_exit(toshiba_acpi_exit);