353b907edbfac5211189929cdf9a91f6be7390a3
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / events / evgpe.c
1 /******************************************************************************
2 *
3 * Module Name: evgpe - General Purpose Event handling and dispatch
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2006, R. Byron Moore
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include <acpi/acpi.h>
45 #include <acpi/acevents.h>
46 #include <acpi/acnamesp.h>
47
48 #define _COMPONENT ACPI_EVENTS
49 ACPI_MODULE_NAME("evgpe")
50
51 /* Local prototypes */
52 static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
53
54 /*******************************************************************************
55 *
56 * FUNCTION: acpi_ev_set_gpe_type
57 *
58 * PARAMETERS: gpe_event_info - GPE to set
59 * Type - New type
60 *
61 * RETURN: Status
62 *
63 * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run)
64 *
65 ******************************************************************************/
66
67 acpi_status
68 acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type)
69 {
70 acpi_status status;
71
72 ACPI_FUNCTION_TRACE("ev_set_gpe_type");
73
74 /* Validate type and update register enable masks */
75
76 switch (type) {
77 case ACPI_GPE_TYPE_WAKE:
78 case ACPI_GPE_TYPE_RUNTIME:
79 case ACPI_GPE_TYPE_WAKE_RUN:
80 break;
81
82 default:
83 return_ACPI_STATUS(AE_BAD_PARAMETER);
84 }
85
86 /* Disable the GPE if currently enabled */
87
88 status = acpi_ev_disable_gpe(gpe_event_info);
89
90 /* Type was validated above */
91
92 gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */
93 gpe_event_info->flags |= type; /* Insert type */
94 return_ACPI_STATUS(status);
95 }
96
97 /*******************************************************************************
98 *
99 * FUNCTION: acpi_ev_update_gpe_enable_masks
100 *
101 * PARAMETERS: gpe_event_info - GPE to update
102 * Type - What to do: ACPI_GPE_DISABLE or
103 * ACPI_GPE_ENABLE
104 *
105 * RETURN: Status
106 *
107 * DESCRIPTION: Updates GPE register enable masks based on the GPE type
108 *
109 ******************************************************************************/
110
111 acpi_status
112 acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info,
113 u8 type)
114 {
115 struct acpi_gpe_register_info *gpe_register_info;
116 u8 register_bit;
117
118 ACPI_FUNCTION_TRACE("ev_update_gpe_enable_masks");
119
120 gpe_register_info = gpe_event_info->register_info;
121 if (!gpe_register_info) {
122 return_ACPI_STATUS(AE_NOT_EXIST);
123 }
124 register_bit = gpe_event_info->register_bit;
125
126 /* 1) Disable case. Simply clear all enable bits */
127
128 if (type == ACPI_GPE_DISABLE) {
129 ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
130 register_bit);
131 ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
132 return_ACPI_STATUS(AE_OK);
133 }
134
135 /* 2) Enable case. Set/Clear the appropriate enable bits */
136
137 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
138 case ACPI_GPE_TYPE_WAKE:
139 ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
140 ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
141 break;
142
143 case ACPI_GPE_TYPE_RUNTIME:
144 ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
145 register_bit);
146 ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
147 break;
148
149 case ACPI_GPE_TYPE_WAKE_RUN:
150 ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
151 ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
152 break;
153
154 default:
155 return_ACPI_STATUS(AE_BAD_PARAMETER);
156 }
157
158 return_ACPI_STATUS(AE_OK);
159 }
160
161 /*******************************************************************************
162 *
163 * FUNCTION: acpi_ev_enable_gpe
164 *
165 * PARAMETERS: gpe_event_info - GPE to enable
166 * write_to_hardware - Enable now, or just mark data structs
167 * (WAKE GPEs should be deferred)
168 *
169 * RETURN: Status
170 *
171 * DESCRIPTION: Enable a GPE based on the GPE type
172 *
173 ******************************************************************************/
174
175 acpi_status
176 acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info,
177 u8 write_to_hardware)
178 {
179 acpi_status status;
180
181 ACPI_FUNCTION_TRACE("ev_enable_gpe");
182
183 /* Make sure HW enable masks are updated */
184
185 status =
186 acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE);
187 if (ACPI_FAILURE(status)) {
188 return_ACPI_STATUS(status);
189 }
190
191 /* Mark wake-enabled or HW enable, or both */
192
193 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
194 case ACPI_GPE_TYPE_WAKE:
195
196 ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
197 break;
198
199 case ACPI_GPE_TYPE_WAKE_RUN:
200
201 ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
202
203 /*lint -fallthrough */
204
205 case ACPI_GPE_TYPE_RUNTIME:
206
207 ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
208
209 if (write_to_hardware) {
210 /* Clear the GPE (of stale events), then enable it */
211
212 status = acpi_hw_clear_gpe(gpe_event_info);
213 if (ACPI_FAILURE(status)) {
214 return_ACPI_STATUS(status);
215 }
216
217 /* Enable the requested runtime GPE */
218
219 status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
220 }
221 break;
222
223 default:
224 return_ACPI_STATUS(AE_BAD_PARAMETER);
225 }
226
227 return_ACPI_STATUS(AE_OK);
228 }
229
230 /*******************************************************************************
231 *
232 * FUNCTION: acpi_ev_disable_gpe
233 *
234 * PARAMETERS: gpe_event_info - GPE to disable
235 *
236 * RETURN: Status
237 *
238 * DESCRIPTION: Disable a GPE based on the GPE type
239 *
240 ******************************************************************************/
241
242 acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
243 {
244 acpi_status status;
245
246 ACPI_FUNCTION_TRACE("ev_disable_gpe");
247
248 if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) {
249 return_ACPI_STATUS(AE_OK);
250 }
251
252 /* Make sure HW enable masks are updated */
253
254 status =
255 acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE);
256 if (ACPI_FAILURE(status)) {
257 return_ACPI_STATUS(status);
258 }
259
260 /* Mark wake-disabled or HW disable, or both */
261
262 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
263 case ACPI_GPE_TYPE_WAKE:
264 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
265 break;
266
267 case ACPI_GPE_TYPE_WAKE_RUN:
268 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
269
270 /*lint -fallthrough */
271
272 case ACPI_GPE_TYPE_RUNTIME:
273
274 /* Disable the requested runtime GPE */
275
276 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
277 status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
278 break;
279
280 default:
281 return_ACPI_STATUS(AE_BAD_PARAMETER);
282 }
283
284 return_ACPI_STATUS(AE_OK);
285 }
286
287 /*******************************************************************************
288 *
289 * FUNCTION: acpi_ev_get_gpe_event_info
290 *
291 * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
292 * gpe_number - Raw GPE number
293 *
294 * RETURN: A GPE event_info struct. NULL if not a valid GPE
295 *
296 * DESCRIPTION: Returns the event_info struct associated with this GPE.
297 * Validates the gpe_block and the gpe_number
298 *
299 * Should be called only when the GPE lists are semaphore locked
300 * and not subject to change.
301 *
302 ******************************************************************************/
303
304 struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
305 u32 gpe_number)
306 {
307 union acpi_operand_object *obj_desc;
308 struct acpi_gpe_block_info *gpe_block;
309 acpi_native_uint i;
310
311 ACPI_FUNCTION_ENTRY();
312
313 /* A NULL gpe_block means use the FADT-defined GPE block(s) */
314
315 if (!gpe_device) {
316 /* Examine GPE Block 0 and 1 (These blocks are permanent) */
317
318 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
319 gpe_block = acpi_gbl_gpe_fadt_blocks[i];
320 if (gpe_block) {
321 if ((gpe_number >= gpe_block->block_base_number)
322 && (gpe_number <
323 gpe_block->block_base_number +
324 (gpe_block->register_count * 8))) {
325 return (&gpe_block->
326 event_info[gpe_number -
327 gpe_block->
328 block_base_number]);
329 }
330 }
331 }
332
333 /* The gpe_number was not in the range of either FADT GPE block */
334
335 return (NULL);
336 }
337
338 /* A Non-NULL gpe_device means this is a GPE Block Device */
339
340 obj_desc =
341 acpi_ns_get_attached_object((struct acpi_namespace_node *)
342 gpe_device);
343 if (!obj_desc || !obj_desc->device.gpe_block) {
344 return (NULL);
345 }
346
347 gpe_block = obj_desc->device.gpe_block;
348
349 if ((gpe_number >= gpe_block->block_base_number) &&
350 (gpe_number <
351 gpe_block->block_base_number + (gpe_block->register_count * 8))) {
352 return (&gpe_block->
353 event_info[gpe_number - gpe_block->block_base_number]);
354 }
355
356 return (NULL);
357 }
358
359 /*******************************************************************************
360 *
361 * FUNCTION: acpi_ev_gpe_detect
362 *
363 * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt.
364 * Can have multiple GPE blocks attached.
365 *
366 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
367 *
368 * DESCRIPTION: Detect if any GP events have occurred. This function is
369 * executed at interrupt level.
370 *
371 ******************************************************************************/
372
373 u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
374 {
375 acpi_status status;
376 struct acpi_gpe_block_info *gpe_block;
377 struct acpi_gpe_register_info *gpe_register_info;
378 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
379 u8 enabled_status_byte;
380 u32 status_reg;
381 u32 enable_reg;
382 acpi_native_uint flags;
383 acpi_native_uint i;
384 acpi_native_uint j;
385
386 ACPI_FUNCTION_NAME("ev_gpe_detect");
387
388 /* Check for the case where there are no GPEs */
389
390 if (!gpe_xrupt_list) {
391 return (int_status);
392 }
393
394 /* Examine all GPE blocks attached to this interrupt level */
395
396 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
397 gpe_block = gpe_xrupt_list->gpe_block_list_head;
398 while (gpe_block) {
399 /*
400 * Read all of the 8-bit GPE status and enable registers
401 * in this GPE block, saving all of them.
402 * Find all currently active GP events.
403 */
404 for (i = 0; i < gpe_block->register_count; i++) {
405 /* Get the next status/enable pair */
406
407 gpe_register_info = &gpe_block->register_info[i];
408
409 /* Read the Status Register */
410
411 status =
412 acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH,
413 &status_reg,
414 &gpe_register_info->
415 status_address);
416 if (ACPI_FAILURE(status)) {
417 goto unlock_and_exit;
418 }
419
420 /* Read the Enable Register */
421
422 status =
423 acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH,
424 &enable_reg,
425 &gpe_register_info->
426 enable_address);
427 if (ACPI_FAILURE(status)) {
428 goto unlock_and_exit;
429 }
430
431 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
432 "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n",
433 gpe_register_info->base_gpe_number,
434 status_reg, enable_reg));
435
436 /* Check if there is anything active at all in this register */
437
438 enabled_status_byte = (u8) (status_reg & enable_reg);
439 if (!enabled_status_byte) {
440 /* No active GPEs in this register, move on */
441
442 continue;
443 }
444
445 /* Now look at the individual GPEs in this byte register */
446
447 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
448 /* Examine one GPE bit */
449
450 if (enabled_status_byte &
451 acpi_gbl_decode_to8bit[j]) {
452 /*
453 * Found an active GPE. Dispatch the event to a handler
454 * or method.
455 */
456 int_status |=
457 acpi_ev_gpe_dispatch(&gpe_block->
458 event_info[(i *
459 ACPI_GPE_REGISTER_WIDTH)
460 +
461 j],
462 (u32) j +
463 gpe_register_info->
464 base_gpe_number);
465 }
466 }
467 }
468
469 gpe_block = gpe_block->next;
470 }
471
472 unlock_and_exit:
473
474 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
475 return (int_status);
476 }
477
478 /*******************************************************************************
479 *
480 * FUNCTION: acpi_ev_asynch_execute_gpe_method
481 *
482 * PARAMETERS: Context (gpe_event_info) - Info for this GPE
483 *
484 * RETURN: None
485 *
486 * DESCRIPTION: Perform the actual execution of a GPE control method. This
487 * function is called from an invocation of acpi_os_queue_for_execution
488 * (and therefore does NOT execute at interrupt level) so that
489 * the control method itself is not executed in the context of
490 * an interrupt handler.
491 *
492 ******************************************************************************/
493
494 static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
495 {
496 struct acpi_gpe_event_info *gpe_event_info = (void *)context;
497 u32 gpe_number = 0;
498 acpi_status status;
499 struct acpi_gpe_event_info local_gpe_event_info;
500 struct acpi_parameter_info info;
501
502 ACPI_FUNCTION_TRACE("ev_asynch_execute_gpe_method");
503
504 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
505 if (ACPI_FAILURE(status)) {
506 return_VOID;
507 }
508
509 /* Must revalidate the gpe_number/gpe_block */
510
511 if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
512 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
513 return_VOID;
514 }
515
516 /* Set the GPE flags for return to enabled state */
517
518 (void)acpi_ev_enable_gpe(gpe_event_info, FALSE);
519
520 /*
521 * Take a snapshot of the GPE info for this level - we copy the
522 * info to prevent a race condition with remove_handler/remove_block.
523 */
524 ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info,
525 sizeof(struct acpi_gpe_event_info));
526
527 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
528 if (ACPI_FAILURE(status)) {
529 return_VOID;
530 }
531
532 /*
533 * Must check for control method type dispatch one more
534 * time to avoid race with ev_gpe_install_handler
535 */
536 if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) ==
537 ACPI_GPE_DISPATCH_METHOD) {
538 /*
539 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx
540 * control method that corresponds to this GPE
541 */
542 info.node = local_gpe_event_info.dispatch.method_node;
543 info.parameters =
544 ACPI_CAST_PTR(union acpi_operand_object *, gpe_event_info);
545 info.parameter_type = ACPI_PARAM_GPE;
546
547 status = acpi_ns_evaluate_by_handle(&info);
548 if (ACPI_FAILURE(status)) {
549 ACPI_REPORT_ERROR(("%s while evaluating method [%4.4s] for GPE[%2X]\n", acpi_format_exception(status), acpi_ut_get_node_name(local_gpe_event_info.dispatch.method_node), gpe_number));
550 }
551 }
552
553 if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
554 ACPI_GPE_LEVEL_TRIGGERED) {
555 /*
556 * GPE is level-triggered, we clear the GPE status bit after
557 * handling the event.
558 */
559 status = acpi_hw_clear_gpe(&local_gpe_event_info);
560 if (ACPI_FAILURE(status)) {
561 return_VOID;
562 }
563 }
564
565 /* Enable this GPE */
566
567 (void)acpi_hw_write_gpe_enable_reg(&local_gpe_event_info);
568 return_VOID;
569 }
570
571 /*******************************************************************************
572 *
573 * FUNCTION: acpi_ev_gpe_dispatch
574 *
575 * PARAMETERS: gpe_event_info - Info for this GPE
576 * gpe_number - Number relative to the parent GPE block
577 *
578 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
579 *
580 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
581 * or method (e.g. _Lxx/_Exx) handler.
582 *
583 * This function executes at interrupt level.
584 *
585 ******************************************************************************/
586
587 u32
588 acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
589 {
590 acpi_status status;
591
592 ACPI_FUNCTION_TRACE("ev_gpe_dispatch");
593
594 /*
595 * If edge-triggered, clear the GPE status bit now. Note that
596 * level-triggered events are cleared after the GPE is serviced.
597 */
598 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
599 ACPI_GPE_EDGE_TRIGGERED) {
600 status = acpi_hw_clear_gpe(gpe_event_info);
601 if (ACPI_FAILURE(status)) {
602 ACPI_REPORT_ERROR(("%s, Unable to clear GPE[%2X]\n",
603 acpi_format_exception(status),
604 gpe_number));
605 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
606 }
607 }
608
609 /* Save current system state */
610
611 if (acpi_gbl_system_awake_and_running) {
612 ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
613 } else {
614 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
615 }
616
617 /*
618 * Dispatch the GPE to either an installed handler, or the control
619 * method associated with this GPE (_Lxx or _Exx).
620 * If a handler exists, we invoke it and do not attempt to run the method.
621 * If there is neither a handler nor a method, we disable the level to
622 * prevent further events from coming in here.
623 */
624 switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
625 case ACPI_GPE_DISPATCH_HANDLER:
626
627 /*
628 * Invoke the installed handler (at interrupt level)
629 * Ignore return status for now. TBD: leave GPE disabled on error?
630 */
631 (void)gpe_event_info->dispatch.handler->address(gpe_event_info->
632 dispatch.
633 handler->
634 context);
635
636 /* It is now safe to clear level-triggered events. */
637
638 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
639 ACPI_GPE_LEVEL_TRIGGERED) {
640 status = acpi_hw_clear_gpe(gpe_event_info);
641 if (ACPI_FAILURE(status)) {
642 ACPI_REPORT_ERROR(("%s, Unable to clear GPE[%2X]\n", acpi_format_exception(status), gpe_number));
643 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
644 }
645 }
646 break;
647
648 case ACPI_GPE_DISPATCH_METHOD:
649
650 /*
651 * Disable GPE, so it doesn't keep firing before the method has a
652 * chance to run.
653 */
654 status = acpi_ev_disable_gpe(gpe_event_info);
655 if (ACPI_FAILURE(status)) {
656 ACPI_REPORT_ERROR(("%s, Unable to disable GPE[%2X]\n",
657 acpi_format_exception(status),
658 gpe_number));
659 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
660 }
661
662 /*
663 * Execute the method associated with the GPE
664 * NOTE: Level-triggered GPEs are cleared after the method completes.
665 */
666 status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
667 acpi_ev_asynch_execute_gpe_method,
668 gpe_event_info);
669 if (ACPI_FAILURE(status)) {
670 ACPI_REPORT_ERROR(("%s, Unable to queue handler for GPE[%2X] - event disabled\n", acpi_format_exception(status), gpe_number));
671 }
672 break;
673
674 default:
675
676 /* No handler or method to run! */
677
678 ACPI_REPORT_ERROR(("No handler or method for GPE[%2X], disabling event\n", gpe_number));
679
680 /*
681 * Disable the GPE. The GPE will remain disabled until the ACPI
682 * Core Subsystem is restarted, or a handler is installed.
683 */
684 status = acpi_ev_disable_gpe(gpe_event_info);
685 if (ACPI_FAILURE(status)) {
686 ACPI_REPORT_ERROR(("%s, Unable to disable GPE[%2X]\n",
687 acpi_format_exception(status),
688 gpe_number));
689 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
690 }
691 break;
692 }
693
694 return_UINT32(ACPI_INTERRUPT_HANDLED);
695 }
696
697 #ifdef ACPI_GPE_NOTIFY_CHECK
698 /*******************************************************************************
699 * TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED
700 *
701 * FUNCTION: acpi_ev_check_for_wake_only_gpe
702 *
703 * PARAMETERS: gpe_event_info - info for this GPE
704 *
705 * RETURN: Status
706 *
707 * DESCRIPTION: Determine if a a GPE is "wake-only".
708 *
709 * Called from Notify() code in interpreter when a "device_wake"
710 * Notify comes in.
711 *
712 ******************************************************************************/
713
714 acpi_status
715 acpi_ev_check_for_wake_only_gpe(struct acpi_gpe_event_info *gpe_event_info)
716 {
717 acpi_status status;
718
719 ACPI_FUNCTION_TRACE("ev_check_for_wake_only_gpe");
720
721 if ((gpe_event_info) && /* Only >0 for _Lxx/_Exx */
722 ((gpe_event_info->flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) { /* System state at GPE time */
723 /* This must be a wake-only GPE, disable it */
724
725 status = acpi_ev_disable_gpe(gpe_event_info);
726
727 /* Set GPE to wake-only. Do not change wake disabled/enabled status */
728
729 acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE);
730
731 ACPI_REPORT_INFO(("GPE %p was updated from wake/run to wake-only\n", gpe_event_info));
732
733 /* This was a wake-only GPE */
734
735 return_ACPI_STATUS(AE_WAKE_ONLY_GPE);
736 }
737
738 return_ACPI_STATUS(AE_OK);
739 }
740 #endif