2
* ACPI-WMI mapping driver
4
* Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
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>
11
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
27
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
30
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
32
#include <linux/kernel.h>
33
#include <linux/init.h>
34
#include <linux/types.h>
35
#include <linux/device.h>
36
#include <linux/list.h>
37
#include <linux/acpi.h>
38
#include <linux/slab.h>
39
#include <linux/module.h>
40
#include <acpi/acpi_bus.h>
41
#include <acpi/acpi_drivers.h>
43
ACPI_MODULE_NAME("wmi");
44
MODULE_AUTHOR("Carlos Corbacho");
45
MODULE_DESCRIPTION("ACPI-WMI Mapping Driver");
46
MODULE_LICENSE("GPL");
48
#define ACPI_WMI_CLASS "wmi"
50
static DEFINE_MUTEX(wmi_data_lock);
51
static LIST_HEAD(wmi_block_list);
58
unsigned char notify_id;
59
unsigned char reserved;
67
struct list_head list;
68
struct guid_block gblock;
70
wmi_notify_handler handler;
77
* If the GUID data block is marked as expensive, we must enable and
78
* explicitily disable data collection.
80
#define ACPI_WMI_EXPENSIVE 0x1
81
#define ACPI_WMI_METHOD 0x2 /* GUID is a method */
82
#define ACPI_WMI_STRING 0x4 /* GUID takes & returns a string */
83
#define ACPI_WMI_EVENT 0x8 /* GUID is an event */
85
static int debug_event;
86
module_param(debug_event, bool, 0444);
87
MODULE_PARM_DESC(debug_event,
88
"Log WMI Events [0/1]");
90
static int debug_dump_wdg;
91
module_param(debug_dump_wdg, bool, 0444);
92
MODULE_PARM_DESC(debug_dump_wdg,
93
"Dump available WMI interfaces [0/1]");
95
static int acpi_wmi_remove(struct acpi_device *device, int type);
96
static int acpi_wmi_add(struct acpi_device *device);
97
static void acpi_wmi_notify(struct acpi_device *device, u32 event);
99
static const struct acpi_device_id wmi_device_ids[] = {
104
MODULE_DEVICE_TABLE(acpi, wmi_device_ids);
106
static struct acpi_driver acpi_wmi_driver = {
108
.class = ACPI_WMI_CLASS,
109
.ids = wmi_device_ids,
112
.remove = acpi_wmi_remove,
113
.notify = acpi_wmi_notify,
118
* GUID parsing functions
122
* wmi_parse_hexbyte - Convert a ASCII hex number to a byte
123
* @src: Pointer to at least 2 characters to convert.
125
* Convert a two character ASCII hex string to a number.
127
* Return: 0-255 Success, the byte was parsed correctly
128
* -1 Error, an invalid character was supplied
130
static int wmi_parse_hexbyte(const u8 *src)
136
h = value = hex_to_bin(src[0]);
141
value = hex_to_bin(src[1]);
143
return (h << 4) | value;
148
* wmi_swap_bytes - Rearrange GUID bytes to match GUID binary
149
* @src: Memory block holding binary GUID (16 bytes)
150
* @dest: Memory block to hold byte swapped binary GUID (16 bytes)
152
* Byte swap a binary GUID to match it's real GUID value
154
static void wmi_swap_bytes(u8 *src, u8 *dest)
158
for (i = 0; i <= 3; i++)
159
memcpy(dest + i, src + (3 - i), 1);
161
for (i = 0; i <= 1; i++)
162
memcpy(dest + 4 + i, src + (5 - i), 1);
164
for (i = 0; i <= 1; i++)
165
memcpy(dest + 6 + i, src + (7 - i), 1);
167
memcpy(dest + 8, src + 8, 8);
171
* wmi_parse_guid - Convert GUID from ASCII to binary
172
* @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
173
* @dest: Memory block to hold binary GUID (16 bytes)
175
* N.B. The GUID need not be NULL terminated.
177
* Return: 'true' @dest contains binary GUID
178
* 'false' @dest contents are undefined
180
static bool wmi_parse_guid(const u8 *src, u8 *dest)
182
static const int size[] = { 4, 2, 2, 2, 6 };
185
if (src[8] != '-' || src[13] != '-' ||
186
src[18] != '-' || src[23] != '-')
189
for (j = 0; j < 5; j++, src++) {
190
for (i = 0; i < size[j]; i++, src += 2, *dest++ = v) {
191
v = wmi_parse_hexbyte(src);
201
* Convert a raw GUID to the ACII string representation
203
static int wmi_gtoa(const char *in, char *out)
207
for (i = 3; i >= 0; i--)
208
out += sprintf(out, "%02X", in[i] & 0xFF);
210
out += sprintf(out, "-");
211
out += sprintf(out, "%02X", in[5] & 0xFF);
212
out += sprintf(out, "%02X", in[4] & 0xFF);
213
out += sprintf(out, "-");
214
out += sprintf(out, "%02X", in[7] & 0xFF);
215
out += sprintf(out, "%02X", in[6] & 0xFF);
216
out += sprintf(out, "-");
217
out += sprintf(out, "%02X", in[8] & 0xFF);
218
out += sprintf(out, "%02X", in[9] & 0xFF);
219
out += sprintf(out, "-");
221
for (i = 10; i <= 15; i++)
222
out += sprintf(out, "%02X", in[i] & 0xFF);
228
static bool find_guid(const char *guid_string, struct wmi_block **out)
230
char tmp[16], guid_input[16];
231
struct wmi_block *wblock;
232
struct guid_block *block;
235
wmi_parse_guid(guid_string, tmp);
236
wmi_swap_bytes(tmp, guid_input);
238
list_for_each(p, &wmi_block_list) {
239
wblock = list_entry(p, struct wmi_block, list);
240
block = &wblock->gblock;
242
if (memcmp(block->guid, guid_input, 16) == 0) {
251
static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
253
struct guid_block *block = NULL;
255
struct acpi_object_list input;
256
union acpi_object params[1];
260
block = &wblock->gblock;
261
handle = wblock->handle;
267
input.pointer = params;
268
params[0].type = ACPI_TYPE_INTEGER;
269
params[0].integer.value = enable;
271
snprintf(method, 5, "WE%02X", block->notify_id);
272
status = acpi_evaluate_object(handle, method, &input, NULL);
274
if (status != AE_OK && status != AE_NOT_FOUND)
281
* Exported WMI functions
284
* wmi_evaluate_method - Evaluate a WMI method
285
* @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
286
* @instance: Instance index
287
* @method_id: Method ID to call
288
* &in: Buffer containing input for the method call
289
* &out: Empty buffer to return the method results
291
* Call an ACPI-WMI method
293
acpi_status wmi_evaluate_method(const char *guid_string, u8 instance,
294
u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
296
struct guid_block *block = NULL;
297
struct wmi_block *wblock = NULL;
300
struct acpi_object_list input;
301
union acpi_object params[3];
302
char method[5] = "WM";
304
if (!find_guid(guid_string, &wblock))
307
block = &wblock->gblock;
308
handle = wblock->handle;
310
if (!(block->flags & ACPI_WMI_METHOD))
313
if (block->instance_count < instance)
314
return AE_BAD_PARAMETER;
317
input.pointer = params;
318
params[0].type = ACPI_TYPE_INTEGER;
319
params[0].integer.value = instance;
320
params[1].type = ACPI_TYPE_INTEGER;
321
params[1].integer.value = method_id;
326
if (block->flags & ACPI_WMI_STRING) {
327
params[2].type = ACPI_TYPE_STRING;
329
params[2].type = ACPI_TYPE_BUFFER;
331
params[2].buffer.length = in->length;
332
params[2].buffer.pointer = in->pointer;
335
strncat(method, block->object_id, 2);
337
status = acpi_evaluate_object(handle, method, &input, out);
341
EXPORT_SYMBOL_GPL(wmi_evaluate_method);
344
* wmi_query_block - Return contents of a WMI block
345
* @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
346
* @instance: Instance index
347
* &out: Empty buffer to return the contents of the data block to
349
* Return the contents of an ACPI-WMI data block to a buffer
351
acpi_status wmi_query_block(const char *guid_string, u8 instance,
352
struct acpi_buffer *out)
354
struct guid_block *block = NULL;
355
struct wmi_block *wblock = NULL;
356
acpi_handle handle, wc_handle;
357
acpi_status status, wc_status = AE_ERROR;
358
struct acpi_object_list input, wc_input;
359
union acpi_object wc_params[1], wq_params[1];
361
char wc_method[5] = "WC";
363
if (!guid_string || !out)
364
return AE_BAD_PARAMETER;
366
if (!find_guid(guid_string, &wblock))
369
block = &wblock->gblock;
370
handle = wblock->handle;
372
if (block->instance_count < instance)
373
return AE_BAD_PARAMETER;
375
/* Check GUID is a data block */
376
if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
380
input.pointer = wq_params;
381
wq_params[0].type = ACPI_TYPE_INTEGER;
382
wq_params[0].integer.value = instance;
385
* If ACPI_WMI_EXPENSIVE, call the relevant WCxx method first to
388
if (block->flags & ACPI_WMI_EXPENSIVE) {
390
wc_input.pointer = wc_params;
391
wc_params[0].type = ACPI_TYPE_INTEGER;
392
wc_params[0].integer.value = 1;
394
strncat(wc_method, block->object_id, 2);
397
* Some GUIDs break the specification by declaring themselves
398
* expensive, but have no corresponding WCxx method. So we
399
* should not fail if this happens.
401
wc_status = acpi_get_handle(handle, wc_method, &wc_handle);
402
if (ACPI_SUCCESS(wc_status))
403
wc_status = acpi_evaluate_object(handle, wc_method,
407
strcpy(method, "WQ");
408
strncat(method, block->object_id, 2);
410
status = acpi_evaluate_object(handle, method, &input, out);
413
* If ACPI_WMI_EXPENSIVE, call the relevant WCxx method, even if
414
* the WQxx method failed - we should disable collection anyway.
416
if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) {
417
wc_params[0].integer.value = 0;
418
status = acpi_evaluate_object(handle,
419
wc_method, &wc_input, NULL);
424
EXPORT_SYMBOL_GPL(wmi_query_block);
427
* wmi_set_block - Write to a WMI block
428
* @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
429
* @instance: Instance index
430
* &in: Buffer containing new values for the data block
432
* Write the contents of the input buffer to an ACPI-WMI data block
434
acpi_status wmi_set_block(const char *guid_string, u8 instance,
435
const struct acpi_buffer *in)
437
struct guid_block *block = NULL;
438
struct wmi_block *wblock = NULL;
440
struct acpi_object_list input;
441
union acpi_object params[2];
442
char method[5] = "WS";
444
if (!guid_string || !in)
447
if (!find_guid(guid_string, &wblock))
450
block = &wblock->gblock;
451
handle = wblock->handle;
453
if (block->instance_count < instance)
454
return AE_BAD_PARAMETER;
456
/* Check GUID is a data block */
457
if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
461
input.pointer = params;
462
params[0].type = ACPI_TYPE_INTEGER;
463
params[0].integer.value = instance;
465
if (block->flags & ACPI_WMI_STRING) {
466
params[1].type = ACPI_TYPE_STRING;
468
params[1].type = ACPI_TYPE_BUFFER;
470
params[1].buffer.length = in->length;
471
params[1].buffer.pointer = in->pointer;
473
strncat(method, block->object_id, 2);
475
return acpi_evaluate_object(handle, method, &input, NULL);
477
EXPORT_SYMBOL_GPL(wmi_set_block);
479
static void wmi_dump_wdg(const struct guid_block *g)
481
char guid_string[37];
483
wmi_gtoa(g->guid, guid_string);
485
pr_info("%s:\n", guid_string);
486
pr_info("\tobject_id: %c%c\n", g->object_id[0], g->object_id[1]);
487
pr_info("\tnotify_id: %02X\n", g->notify_id);
488
pr_info("\treserved: %02X\n", g->reserved);
489
pr_info("\tinstance_count: %d\n", g->instance_count);
490
pr_info("\tflags: %#x", g->flags);
492
if (g->flags & ACPI_WMI_EXPENSIVE)
493
pr_cont(" ACPI_WMI_EXPENSIVE");
494
if (g->flags & ACPI_WMI_METHOD)
495
pr_cont(" ACPI_WMI_METHOD");
496
if (g->flags & ACPI_WMI_STRING)
497
pr_cont(" ACPI_WMI_STRING");
498
if (g->flags & ACPI_WMI_EVENT)
499
pr_cont(" ACPI_WMI_EVENT");
505
static void wmi_notify_debug(u32 value, void *context)
507
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
508
union acpi_object *obj;
511
status = wmi_get_event_data(value, &response);
512
if (status != AE_OK) {
513
pr_info("bad event status 0x%x\n", status);
517
obj = (union acpi_object *)response.pointer;
522
pr_info("DEBUG Event ");
524
case ACPI_TYPE_BUFFER:
525
pr_cont("BUFFER_TYPE - length %d\n", obj->buffer.length);
527
case ACPI_TYPE_STRING:
528
pr_cont("STRING_TYPE - %s\n", obj->string.pointer);
530
case ACPI_TYPE_INTEGER:
531
pr_cont("INTEGER_TYPE - %llu\n", obj->integer.value);
533
case ACPI_TYPE_PACKAGE:
534
pr_cont("PACKAGE_TYPE - %d elements\n", obj->package.count);
537
pr_cont("object type 0x%X\n", obj->type);
543
* wmi_install_notify_handler - Register handler for WMI events
544
* @handler: Function to handle notifications
545
* @data: Data to be returned to handler when event is fired
547
* Register a handler for events sent to the ACPI-WMI mapper device.
549
acpi_status wmi_install_notify_handler(const char *guid,
550
wmi_notify_handler handler, void *data)
552
struct wmi_block *block;
553
acpi_status status = AE_NOT_EXIST;
554
char tmp[16], guid_input[16];
557
if (!guid || !handler)
558
return AE_BAD_PARAMETER;
560
wmi_parse_guid(guid, tmp);
561
wmi_swap_bytes(tmp, guid_input);
563
list_for_each(p, &wmi_block_list) {
564
acpi_status wmi_status;
565
block = list_entry(p, struct wmi_block, list);
567
if (memcmp(block->gblock.guid, guid_input, 16) == 0) {
568
if (block->handler &&
569
block->handler != wmi_notify_debug)
570
return AE_ALREADY_ACQUIRED;
572
block->handler = handler;
573
block->handler_data = data;
575
wmi_status = wmi_method_enable(block, 1);
576
if ((wmi_status != AE_OK) ||
577
((wmi_status == AE_OK) && (status == AE_NOT_EXIST)))
584
EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
587
* wmi_uninstall_notify_handler - Unregister handler for WMI events
589
* Unregister handler for events sent to the ACPI-WMI mapper device.
591
acpi_status wmi_remove_notify_handler(const char *guid)
593
struct wmi_block *block;
594
acpi_status status = AE_NOT_EXIST;
595
char tmp[16], guid_input[16];
599
return AE_BAD_PARAMETER;
601
wmi_parse_guid(guid, tmp);
602
wmi_swap_bytes(tmp, guid_input);
604
list_for_each(p, &wmi_block_list) {
605
acpi_status wmi_status;
606
block = list_entry(p, struct wmi_block, list);
608
if (memcmp(block->gblock.guid, guid_input, 16) == 0) {
609
if (!block->handler ||
610
block->handler == wmi_notify_debug)
611
return AE_NULL_ENTRY;
614
block->handler = wmi_notify_debug;
617
wmi_status = wmi_method_enable(block, 0);
618
block->handler = NULL;
619
block->handler_data = NULL;
620
if ((wmi_status != AE_OK) ||
621
((wmi_status == AE_OK) &&
622
(status == AE_NOT_EXIST)))
630
EXPORT_SYMBOL_GPL(wmi_remove_notify_handler);
633
* wmi_get_event_data - Get WMI data associated with an event
635
* @event: Event to find
636
* @out: Buffer to hold event data. out->pointer should be freed with kfree()
638
* Returns extra data associated with an event in WMI.
640
acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out)
642
struct acpi_object_list input;
643
union acpi_object params[1];
644
struct guid_block *gblock;
645
struct wmi_block *wblock;
649
input.pointer = params;
650
params[0].type = ACPI_TYPE_INTEGER;
651
params[0].integer.value = event;
653
list_for_each(p, &wmi_block_list) {
654
wblock = list_entry(p, struct wmi_block, list);
655
gblock = &wblock->gblock;
657
if ((gblock->flags & ACPI_WMI_EVENT) &&
658
(gblock->notify_id == event))
659
return acpi_evaluate_object(wblock->handle, "_WED",
665
EXPORT_SYMBOL_GPL(wmi_get_event_data);
668
* wmi_has_guid - Check if a GUID is available
669
* @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
671
* Check if a given GUID is defined by _WDG
673
bool wmi_has_guid(const char *guid_string)
675
return find_guid(guid_string, NULL);
677
EXPORT_SYMBOL_GPL(wmi_has_guid);
682
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
685
char guid_string[37];
686
struct wmi_block *wblock;
688
wblock = dev_get_drvdata(dev);
692
wmi_gtoa(wblock->gblock.guid, guid_string);
694
return sprintf(buf, "wmi:%s\n", guid_string);
697
static struct device_attribute wmi_dev_attrs[] = {
702
static int wmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
704
char guid_string[37];
706
struct wmi_block *wblock;
708
if (add_uevent_var(env, "MODALIAS="))
711
wblock = dev_get_drvdata(dev);
715
wmi_gtoa(wblock->gblock.guid, guid_string);
717
strcpy(&env->buf[env->buflen - 1], "wmi:");
718
memcpy(&env->buf[env->buflen - 1 + 4], guid_string, 36);
724
static void wmi_dev_free(struct device *dev)
726
struct wmi_block *wmi_block = container_of(dev, struct wmi_block, dev);
731
static struct class wmi_class = {
733
.dev_release = wmi_dev_free,
734
.dev_uevent = wmi_dev_uevent,
735
.dev_attrs = wmi_dev_attrs,
738
static int wmi_create_device(const struct guid_block *gblock,
739
struct wmi_block *wblock, acpi_handle handle)
741
char guid_string[37];
743
wblock->dev.class = &wmi_class;
745
wmi_gtoa(gblock->guid, guid_string);
746
dev_set_name(&wblock->dev, guid_string);
748
dev_set_drvdata(&wblock->dev, wblock);
750
return device_register(&wblock->dev);
753
static void wmi_free_devices(void)
755
struct wmi_block *wblock, *next;
757
/* Delete devices for all the GUIDs */
758
list_for_each_entry_safe(wblock, next, &wmi_block_list, list) {
759
list_del(&wblock->list);
760
if (wblock->dev.class)
761
device_unregister(&wblock->dev);
767
static bool guid_already_parsed(const char *guid_string)
769
struct wmi_block *wblock;
771
list_for_each_entry(wblock, &wmi_block_list, list)
772
if (memcmp(wblock->gblock.guid, guid_string, 16) == 0)
779
* Parse the _WDG method for the GUID data blocks
781
static acpi_status parse_wdg(acpi_handle handle)
783
struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
784
union acpi_object *obj;
785
const struct guid_block *gblock;
786
struct wmi_block *wblock;
791
status = acpi_evaluate_object(handle, "_WDG", NULL, &out);
792
if (ACPI_FAILURE(status))
795
obj = (union acpi_object *) out.pointer;
799
if (obj->type != ACPI_TYPE_BUFFER) {
801
goto out_free_pointer;
804
gblock = (const struct guid_block *)obj->buffer.pointer;
805
total = obj->buffer.length / sizeof(struct guid_block);
807
for (i = 0; i < total; i++) {
809
wmi_dump_wdg(&gblock[i]);
811
wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL);
815
wblock->handle = handle;
816
wblock->gblock = gblock[i];
819
Some WMI devices, like those for nVidia hooks, have a
820
duplicate GUID. It's not clear what we should do in this
821
case yet, so for now, we'll just ignore the duplicate
824
if (!guid_already_parsed(gblock[i].guid)) {
825
retval = wmi_create_device(&gblock[i], wblock, handle);
828
goto out_free_pointer;
832
list_add_tail(&wblock->list, &wmi_block_list);
835
wblock->handler = wmi_notify_debug;
836
wmi_method_enable(wblock, 1);
849
* WMI can have EmbeddedControl access regions. In which case, we just want to
850
* hand these off to the EC driver.
853
acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
854
u32 bits, u64 *value,
855
void *handler_context, void *region_context)
857
int result = 0, i = 0;
860
if ((address > 0xFF) || !value)
861
return AE_BAD_PARAMETER;
863
if (function != ACPI_READ && function != ACPI_WRITE)
864
return AE_BAD_PARAMETER;
867
return AE_BAD_PARAMETER;
869
if (function == ACPI_READ) {
870
result = ec_read(address, &temp);
871
(*value) |= ((u64)temp) << i;
873
temp = 0xff & ((*value) >> i);
874
result = ec_write(address, temp);
879
return AE_BAD_PARAMETER;
892
static void acpi_wmi_notify(struct acpi_device *device, u32 event)
894
struct guid_block *block;
895
struct wmi_block *wblock;
897
char guid_string[37];
899
list_for_each(p, &wmi_block_list) {
900
wblock = list_entry(p, struct wmi_block, list);
901
block = &wblock->gblock;
903
if ((block->flags & ACPI_WMI_EVENT) &&
904
(block->notify_id == event)) {
906
wblock->handler(event, wblock->handler_data);
908
wmi_gtoa(wblock->gblock.guid, guid_string);
909
pr_info("DEBUG Event GUID: %s\n", guid_string);
912
acpi_bus_generate_netlink_event(
913
device->pnp.device_class, dev_name(&device->dev),
920
static int acpi_wmi_remove(struct acpi_device *device, int type)
922
acpi_remove_address_space_handler(device->handle,
923
ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler);
929
static int acpi_wmi_add(struct acpi_device *device)
934
status = acpi_install_address_space_handler(device->handle,
936
&acpi_wmi_ec_space_handler,
938
if (ACPI_FAILURE(status)) {
939
pr_err("Error installing EC region handler\n");
943
error = parse_wdg(device->handle);
945
acpi_remove_address_space_handler(device->handle,
947
&acpi_wmi_ec_space_handler);
948
pr_err("Failed to parse WDG method\n");
955
static int __init acpi_wmi_init(void)
962
error = class_register(&wmi_class);
966
error = acpi_bus_register_driver(&acpi_wmi_driver);
968
pr_err("Error loading mapper\n");
969
class_unregister(&wmi_class);
973
pr_info("Mapper loaded\n");
977
static void __exit acpi_wmi_exit(void)
979
acpi_bus_unregister_driver(&acpi_wmi_driver);
980
class_unregister(&wmi_class);
982
pr_info("Mapper unloaded\n");
985
subsys_initcall(acpi_wmi_init);
986
module_exit(acpi_wmi_exit);