blob: 47cd7baf9b1bd85fb327efc79186a7e6f5b1c461 [file] [log] [blame]
Carlos Corbachobff431e2008-02-05 02:17:04 +00001/*
2 * ACPI-WMI mapping driver
3 *
4 * Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
5 *
6 * GUID parsing code from ldm.c is:
7 * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
8 * Copyright (c) 2001-2007 Anton Altaparmakov
9 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
10 *
11 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or (at
16 * your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 *
27 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 */
29
30#include <linux/kernel.h>
31#include <linux/init.h>
32#include <linux/types.h>
33#include <linux/list.h>
34#include <linux/acpi.h>
35#include <acpi/acpi_bus.h>
36#include <acpi/acpi_drivers.h>
37
38ACPI_MODULE_NAME("wmi");
39MODULE_AUTHOR("Carlos Corbacho");
40MODULE_DESCRIPTION("ACPI-WMI Mapping Driver");
41MODULE_LICENSE("GPL");
42
43#define ACPI_WMI_CLASS "wmi"
44
45#undef PREFIX
46#define PREFIX "ACPI: WMI: "
47
48static DEFINE_MUTEX(wmi_data_lock);
49
50struct guid_block {
51 char guid[16];
52 union {
53 char object_id[2];
54 struct {
55 unsigned char notify_id;
56 unsigned char reserved;
57 };
58 };
59 u8 instance_count;
60 u8 flags;
61};
62
63struct wmi_block {
64 struct list_head list;
65 struct guid_block gblock;
66 acpi_handle handle;
67 wmi_notify_handler handler;
68 void *handler_data;
69};
70
71static struct wmi_block wmi_blocks;
72
73/*
74 * If the GUID data block is marked as expensive, we must enable and
75 * explicitily disable data collection.
76 */
77#define ACPI_WMI_EXPENSIVE 0x1
78#define ACPI_WMI_METHOD 0x2 /* GUID is a method */
79#define ACPI_WMI_STRING 0x4 /* GUID takes & returns a string */
80#define ACPI_WMI_EVENT 0x8 /* GUID is an event */
81
82static int acpi_wmi_remove(struct acpi_device *device, int type);
83static int acpi_wmi_add(struct acpi_device *device);
84
85static const struct acpi_device_id wmi_device_ids[] = {
86 {"PNP0C14", 0},
87 {"pnp0c14", 0},
88 {"", 0},
89};
90MODULE_DEVICE_TABLE(acpi, wmi_device_ids);
91
92static struct acpi_driver acpi_wmi_driver = {
93 .name = "wmi",
94 .class = ACPI_WMI_CLASS,
95 .ids = wmi_device_ids,
96 .ops = {
97 .add = acpi_wmi_add,
98 .remove = acpi_wmi_remove,
99 },
100};
101
102/*
103 * GUID parsing functions
104 */
105
106/**
107 * wmi_parse_hexbyte - Convert a ASCII hex number to a byte
108 * @src: Pointer to at least 2 characters to convert.
109 *
110 * Convert a two character ASCII hex string to a number.
111 *
112 * Return: 0-255 Success, the byte was parsed correctly
113 * -1 Error, an invalid character was supplied
114 */
115static int wmi_parse_hexbyte(const u8 *src)
116{
117 unsigned int x; /* For correct wrapping */
118 int h;
119
120 /* high part */
121 x = src[0];
122 if (x - '0' <= '9' - '0') {
123 h = x - '0';
124 } else if (x - 'a' <= 'f' - 'a') {
125 h = x - 'a' + 10;
126 } else if (x - 'A' <= 'F' - 'A') {
127 h = x - 'A' + 10;
128 } else {
129 return -1;
130 }
131 h <<= 4;
132
133 /* low part */
134 x = src[1];
135 if (x - '0' <= '9' - '0')
136 return h | (x - '0');
137 if (x - 'a' <= 'f' - 'a')
138 return h | (x - 'a' + 10);
139 if (x - 'A' <= 'F' - 'A')
140 return h | (x - 'A' + 10);
141 return -1;
142}
143
144/**
145 * wmi_swap_bytes - Rearrange GUID bytes to match GUID binary
146 * @src: Memory block holding binary GUID (16 bytes)
147 * @dest: Memory block to hold byte swapped binary GUID (16 bytes)
148 *
149 * Byte swap a binary GUID to match it's real GUID value
150 */
151static void wmi_swap_bytes(u8 *src, u8 *dest)
152{
153 int i;
154
155 for (i = 0; i <= 3; i++)
156 memcpy(dest + i, src + (3 - i), 1);
157
158 for (i = 0; i <= 1; i++)
159 memcpy(dest + 4 + i, src + (5 - i), 1);
160
161 for (i = 0; i <= 1; i++)
162 memcpy(dest + 6 + i, src + (7 - i), 1);
163
164 memcpy(dest + 8, src + 8, 8);
165}
166
167/**
168 * wmi_parse_guid - Convert GUID from ASCII to binary
169 * @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
170 * @dest: Memory block to hold binary GUID (16 bytes)
171 *
172 * N.B. The GUID need not be NULL terminated.
173 *
174 * Return: 'true' @dest contains binary GUID
175 * 'false' @dest contents are undefined
176 */
177static bool wmi_parse_guid(const u8 *src, u8 *dest)
178{
179 static const int size[] = { 4, 2, 2, 2, 6 };
180 int i, j, v;
181
182 if (src[8] != '-' || src[13] != '-' ||
183 src[18] != '-' || src[23] != '-')
184 return false;
185
186 for (j = 0; j < 5; j++, src++) {
187 for (i = 0; i < size[j]; i++, src += 2, *dest++ = v) {
188 v = wmi_parse_hexbyte(src);
189 if (v < 0)
190 return false;
191 }
192 }
193
194 return true;
195}
196
197static bool find_guid(const char *guid_string, struct wmi_block **out)
198{
199 char tmp[16], guid_input[16];
200 struct wmi_block *wblock;
201 struct guid_block *block;
202 struct list_head *p;
203
204 wmi_parse_guid(guid_string, tmp);
205 wmi_swap_bytes(tmp, guid_input);
206
207 list_for_each(p, &wmi_blocks.list) {
208 wblock = list_entry(p, struct wmi_block, list);
209 block = &wblock->gblock;
210
211 if (memcmp(block->guid, guid_input, 16) == 0) {
212 if (out)
213 *out = wblock;
214 return 1;
215 }
216 }
217 return 0;
218}
219
Matthew Garretta66bfa72008-10-08 21:40:32 +0100220static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
221{
222 struct guid_block *block = NULL;
223 char method[5];
224 struct acpi_object_list input;
225 union acpi_object params[1];
226 acpi_status status;
227 acpi_handle handle;
228
229 block = &wblock->gblock;
230 handle = wblock->handle;
231
232 if (!block)
233 return AE_NOT_EXIST;
234
235 input.count = 1;
236 input.pointer = params;
237 params[0].type = ACPI_TYPE_INTEGER;
238 params[0].integer.value = enable;
239
240 snprintf(method, 5, "WE%02X", block->notify_id);
241 status = acpi_evaluate_object(handle, method, &input, NULL);
242
243 if (status != AE_OK && status != AE_NOT_FOUND)
244 return status;
245 else
246 return AE_OK;
247}
248
Carlos Corbachobff431e2008-02-05 02:17:04 +0000249/*
250 * Exported WMI functions
251 */
252/**
253 * wmi_evaluate_method - Evaluate a WMI method
254 * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
255 * @instance: Instance index
256 * @method_id: Method ID to call
257 * &in: Buffer containing input for the method call
258 * &out: Empty buffer to return the method results
259 *
260 * Call an ACPI-WMI method
261 */
262acpi_status wmi_evaluate_method(const char *guid_string, u8 instance,
263u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
264{
265 struct guid_block *block = NULL;
266 struct wmi_block *wblock = NULL;
267 acpi_handle handle;
268 acpi_status status;
269 struct acpi_object_list input;
270 union acpi_object params[3];
271 char method[4] = "WM";
272
273 if (!find_guid(guid_string, &wblock))
Lin Ming08237972008-08-08 11:57:11 +0800274 return AE_ERROR;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000275
276 block = &wblock->gblock;
277 handle = wblock->handle;
278
Al Viroe6bafba2008-02-13 04:03:25 +0000279 if (!(block->flags & ACPI_WMI_METHOD))
Carlos Corbachobff431e2008-02-05 02:17:04 +0000280 return AE_BAD_DATA;
281
282 if (block->instance_count < instance)
283 return AE_BAD_PARAMETER;
284
285 input.count = 2;
286 input.pointer = params;
287 params[0].type = ACPI_TYPE_INTEGER;
288 params[0].integer.value = instance;
289 params[1].type = ACPI_TYPE_INTEGER;
290 params[1].integer.value = method_id;
291
292 if (in) {
293 input.count = 3;
294
295 if (block->flags & ACPI_WMI_STRING) {
296 params[2].type = ACPI_TYPE_STRING;
297 } else {
298 params[2].type = ACPI_TYPE_BUFFER;
299 }
300 params[2].buffer.length = in->length;
301 params[2].buffer.pointer = in->pointer;
302 }
303
304 strncat(method, block->object_id, 2);
305
306 status = acpi_evaluate_object(handle, method, &input, out);
307
308 return status;
309}
310EXPORT_SYMBOL_GPL(wmi_evaluate_method);
311
312/**
313 * wmi_query_block - Return contents of a WMI block
314 * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
315 * @instance: Instance index
316 * &out: Empty buffer to return the contents of the data block to
317 *
318 * Return the contents of an ACPI-WMI data block to a buffer
319 */
320acpi_status wmi_query_block(const char *guid_string, u8 instance,
321struct acpi_buffer *out)
322{
323 struct guid_block *block = NULL;
324 struct wmi_block *wblock = NULL;
Carlos Corbachoa527f2d2008-02-24 13:34:34 +0000325 acpi_handle handle, wc_handle;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000326 acpi_status status, wc_status = AE_ERROR;
327 struct acpi_object_list input, wc_input;
328 union acpi_object wc_params[1], wq_params[1];
329 char method[4];
330 char wc_method[4] = "WC";
331
332 if (!guid_string || !out)
333 return AE_BAD_PARAMETER;
334
335 if (!find_guid(guid_string, &wblock))
Lin Ming08237972008-08-08 11:57:11 +0800336 return AE_ERROR;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000337
338 block = &wblock->gblock;
339 handle = wblock->handle;
340
341 if (block->instance_count < instance)
342 return AE_BAD_PARAMETER;
343
344 /* Check GUID is a data block */
345 if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
Lin Ming08237972008-08-08 11:57:11 +0800346 return AE_ERROR;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000347
348 input.count = 1;
349 input.pointer = wq_params;
350 wq_params[0].type = ACPI_TYPE_INTEGER;
351 wq_params[0].integer.value = instance;
352
353 /*
354 * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method first to
355 * enable collection.
356 */
357 if (block->flags & ACPI_WMI_EXPENSIVE) {
358 wc_input.count = 1;
359 wc_input.pointer = wc_params;
360 wc_params[0].type = ACPI_TYPE_INTEGER;
361 wc_params[0].integer.value = 1;
362
363 strncat(wc_method, block->object_id, 2);
364
365 /*
366 * Some GUIDs break the specification by declaring themselves
367 * expensive, but have no corresponding WCxx method. So we
368 * should not fail if this happens.
369 */
Carlos Corbachoa527f2d2008-02-24 13:34:34 +0000370 wc_status = acpi_get_handle(handle, wc_method, &wc_handle);
371 if (ACPI_SUCCESS(wc_status))
372 wc_status = acpi_evaluate_object(handle, wc_method,
373 &wc_input, NULL);
Carlos Corbachobff431e2008-02-05 02:17:04 +0000374 }
375
376 strcpy(method, "WQ");
377 strncat(method, block->object_id, 2);
378
Carlos Corbachodab36ad2008-08-02 17:28:45 +0100379 status = acpi_evaluate_object(handle, method, &input, out);
Carlos Corbachobff431e2008-02-05 02:17:04 +0000380
381 /*
382 * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method, even if
383 * the WQxx method failed - we should disable collection anyway.
384 */
Carlos Corbachoa527f2d2008-02-24 13:34:34 +0000385 if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) {
Carlos Corbachobff431e2008-02-05 02:17:04 +0000386 wc_params[0].integer.value = 0;
387 status = acpi_evaluate_object(handle,
388 wc_method, &wc_input, NULL);
389 }
390
391 return status;
392}
393EXPORT_SYMBOL_GPL(wmi_query_block);
394
395/**
396 * wmi_set_block - Write to a WMI block
397 * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
398 * @instance: Instance index
399 * &in: Buffer containing new values for the data block
400 *
401 * Write the contents of the input buffer to an ACPI-WMI data block
402 */
403acpi_status wmi_set_block(const char *guid_string, u8 instance,
404const struct acpi_buffer *in)
405{
406 struct guid_block *block = NULL;
407 struct wmi_block *wblock = NULL;
408 acpi_handle handle;
409 struct acpi_object_list input;
410 union acpi_object params[2];
411 char method[4] = "WS";
412
413 if (!guid_string || !in)
414 return AE_BAD_DATA;
415
416 if (!find_guid(guid_string, &wblock))
Lin Ming08237972008-08-08 11:57:11 +0800417 return AE_ERROR;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000418
419 block = &wblock->gblock;
420 handle = wblock->handle;
421
422 if (block->instance_count < instance)
423 return AE_BAD_PARAMETER;
424
425 /* Check GUID is a data block */
426 if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
Lin Ming08237972008-08-08 11:57:11 +0800427 return AE_ERROR;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000428
429 input.count = 2;
430 input.pointer = params;
431 params[0].type = ACPI_TYPE_INTEGER;
432 params[0].integer.value = instance;
433
434 if (block->flags & ACPI_WMI_STRING) {
435 params[1].type = ACPI_TYPE_STRING;
436 } else {
437 params[1].type = ACPI_TYPE_BUFFER;
438 }
439 params[1].buffer.length = in->length;
440 params[1].buffer.pointer = in->pointer;
441
442 strncat(method, block->object_id, 2);
443
444 return acpi_evaluate_object(handle, method, &input, NULL);
445}
446EXPORT_SYMBOL_GPL(wmi_set_block);
447
448/**
449 * wmi_install_notify_handler - Register handler for WMI events
450 * @handler: Function to handle notifications
451 * @data: Data to be returned to handler when event is fired
452 *
453 * Register a handler for events sent to the ACPI-WMI mapper device.
454 */
455acpi_status wmi_install_notify_handler(const char *guid,
456wmi_notify_handler handler, void *data)
457{
458 struct wmi_block *block;
Matthew Garretta66bfa72008-10-08 21:40:32 +0100459 acpi_status status;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000460
461 if (!guid || !handler)
462 return AE_BAD_PARAMETER;
463
464 find_guid(guid, &block);
465 if (!block)
466 return AE_NOT_EXIST;
467
468 if (block->handler)
469 return AE_ALREADY_ACQUIRED;
470
471 block->handler = handler;
472 block->handler_data = data;
473
Matthew Garretta66bfa72008-10-08 21:40:32 +0100474 status = wmi_method_enable(block, 1);
475
476 return status;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000477}
478EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
479
480/**
481 * wmi_uninstall_notify_handler - Unregister handler for WMI events
482 *
483 * Unregister handler for events sent to the ACPI-WMI mapper device.
484 */
485acpi_status wmi_remove_notify_handler(const char *guid)
486{
487 struct wmi_block *block;
Matthew Garretta66bfa72008-10-08 21:40:32 +0100488 acpi_status status;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000489
490 if (!guid)
491 return AE_BAD_PARAMETER;
492
493 find_guid(guid, &block);
494 if (!block)
495 return AE_NOT_EXIST;
496
497 if (!block->handler)
498 return AE_NULL_ENTRY;
499
Matthew Garretta66bfa72008-10-08 21:40:32 +0100500 status = wmi_method_enable(block, 0);
501
Carlos Corbachobff431e2008-02-05 02:17:04 +0000502 block->handler = NULL;
503 block->handler_data = NULL;
504
Matthew Garretta66bfa72008-10-08 21:40:32 +0100505 return status;
Carlos Corbachobff431e2008-02-05 02:17:04 +0000506}
507EXPORT_SYMBOL_GPL(wmi_remove_notify_handler);
508
509/**
510 * wmi_get_event_data - Get WMI data associated with an event
511 *
512 * @event - Event to find
513 * &out - Buffer to hold event data
514 *
515 * Returns extra data associated with an event in WMI.
516 */
517acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out)
518{
519 struct acpi_object_list input;
520 union acpi_object params[1];
521 struct guid_block *gblock;
522 struct wmi_block *wblock;
523 struct list_head *p;
524
525 input.count = 1;
526 input.pointer = params;
527 params[0].type = ACPI_TYPE_INTEGER;
528 params[0].integer.value = event;
529
530 list_for_each(p, &wmi_blocks.list) {
531 wblock = list_entry(p, struct wmi_block, list);
532 gblock = &wblock->gblock;
533
534 if ((gblock->flags & ACPI_WMI_EVENT) &&
535 (gblock->notify_id == event))
536 return acpi_evaluate_object(wblock->handle, "_WED",
537 &input, out);
538 }
539
540 return AE_NOT_FOUND;
541}
542EXPORT_SYMBOL_GPL(wmi_get_event_data);
543
544/**
545 * wmi_has_guid - Check if a GUID is available
546 * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
547 *
548 * Check if a given GUID is defined by _WDG
549 */
550bool wmi_has_guid(const char *guid_string)
551{
552 return find_guid(guid_string, NULL);
553}
554EXPORT_SYMBOL_GPL(wmi_has_guid);
555
556/*
557 * Parse the _WDG method for the GUID data blocks
558 */
559static __init acpi_status parse_wdg(acpi_handle handle)
560{
561 struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
562 union acpi_object *obj;
563 struct guid_block *gblock;
564 struct wmi_block *wblock;
565 acpi_status status;
566 u32 i, total;
567
568 status = acpi_evaluate_object(handle, "_WDG", NULL, &out);
569
570 if (ACPI_FAILURE(status))
571 return status;
572
573 obj = (union acpi_object *) out.pointer;
574
575 if (obj->type != ACPI_TYPE_BUFFER)
576 return AE_ERROR;
577
578 total = obj->buffer.length / sizeof(struct guid_block);
579
580 gblock = kzalloc(obj->buffer.length, GFP_KERNEL);
581 if (!gblock)
582 return AE_NO_MEMORY;
583
584 memcpy(gblock, obj->buffer.pointer, obj->buffer.length);
585
586 for (i = 0; i < total; i++) {
587 wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL);
588 if (!wblock)
589 return AE_NO_MEMORY;
590
591 wblock->gblock = gblock[i];
592 wblock->handle = handle;
593 list_add_tail(&wblock->list, &wmi_blocks.list);
594 }
595
596 kfree(out.pointer);
597 kfree(gblock);
598
599 return status;
600}
601
602/*
603 * WMI can have EmbeddedControl access regions. In which case, we just want to
604 * hand these off to the EC driver.
605 */
606static acpi_status
607acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
608 u32 bits, acpi_integer * value,
609 void *handler_context, void *region_context)
610{
611 int result = 0, i = 0;
612 u8 temp = 0;
613
614 if ((address > 0xFF) || !value)
615 return AE_BAD_PARAMETER;
616
617 if (function != ACPI_READ && function != ACPI_WRITE)
618 return AE_BAD_PARAMETER;
619
620 if (bits != 8)
621 return AE_BAD_PARAMETER;
622
623 if (function == ACPI_READ) {
624 result = ec_read(address, &temp);
625 (*value) |= ((acpi_integer)temp) << i;
626 } else {
627 temp = 0xff & ((*value) >> i);
628 result = ec_write(address, temp);
629 }
630
631 switch (result) {
632 case -EINVAL:
633 return AE_BAD_PARAMETER;
634 break;
635 case -ENODEV:
636 return AE_NOT_FOUND;
637 break;
638 case -ETIME:
639 return AE_TIME;
640 break;
641 default:
642 return AE_OK;
643 }
644}
645
646static void acpi_wmi_notify(acpi_handle handle, u32 event, void *data)
647{
648 struct guid_block *block;
649 struct wmi_block *wblock;
650 struct list_head *p;
651 struct acpi_device *device = data;
652
653 list_for_each(p, &wmi_blocks.list) {
654 wblock = list_entry(p, struct wmi_block, list);
655 block = &wblock->gblock;
656
657 if ((block->flags & ACPI_WMI_EVENT) &&
658 (block->notify_id == event)) {
659 if (wblock->handler)
660 wblock->handler(event, wblock->handler_data);
661
662 acpi_bus_generate_netlink_event(
663 device->pnp.device_class, device->dev.bus_id,
664 event, 0);
665 break;
666 }
667 }
668}
669
670static int acpi_wmi_remove(struct acpi_device *device, int type)
671{
672 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
673 acpi_wmi_notify);
674
675 acpi_remove_address_space_handler(device->handle,
676 ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler);
677
678 return 0;
679}
680
681static int __init acpi_wmi_add(struct acpi_device *device)
682{
683 acpi_status status;
684 int result = 0;
685
686 status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
687 acpi_wmi_notify, device);
688 if (ACPI_FAILURE(status)) {
689 printk(KERN_ERR PREFIX "Error installing notify handler\n");
690 return -ENODEV;
691 }
692
693 status = acpi_install_address_space_handler(device->handle,
694 ACPI_ADR_SPACE_EC,
695 &acpi_wmi_ec_space_handler,
696 NULL, NULL);
697 if (ACPI_FAILURE(status))
698 return -ENODEV;
699
700 status = parse_wdg(device->handle);
701 if (ACPI_FAILURE(status)) {
702 printk(KERN_ERR PREFIX "Error installing EC region handler\n");
703 return -ENODEV;
704 }
705
706 return result;
707}
708
709static int __init acpi_wmi_init(void)
710{
711 acpi_status result;
712
Linus Torvalds96b5a462008-02-11 20:52:01 -0800713 INIT_LIST_HEAD(&wmi_blocks.list);
714
Carlos Corbachobff431e2008-02-05 02:17:04 +0000715 if (acpi_disabled)
716 return -ENODEV;
717
Carlos Corbachobff431e2008-02-05 02:17:04 +0000718 result = acpi_bus_register_driver(&acpi_wmi_driver);
719
720 if (result < 0) {
721 printk(KERN_INFO PREFIX "Error loading mapper\n");
722 } else {
723 printk(KERN_INFO PREFIX "Mapper loaded\n");
724 }
725
726 return result;
727}
728
729static void __exit acpi_wmi_exit(void)
730{
731 struct list_head *p, *tmp;
732 struct wmi_block *wblock;
733
734 acpi_bus_unregister_driver(&acpi_wmi_driver);
735
736 list_for_each_safe(p, tmp, &wmi_blocks.list) {
737 wblock = list_entry(p, struct wmi_block, list);
738
739 list_del(p);
740 kfree(wblock);
741 }
742
743 printk(KERN_INFO PREFIX "Mapper unloaded\n");
744}
745
746subsys_initcall(acpi_wmi_init);
747module_exit(acpi_wmi_exit);