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Linux-2.6.12-rc2
[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 - 2005, 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
52 /*******************************************************************************
53 *
54 * FUNCTION: acpi_ev_set_gpe_type
55 *
56 * PARAMETERS: gpe_event_info - GPE to set
57 * Type - New type
58 *
59 * RETURN: Status
60 *
61 * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run)
62 *
63 ******************************************************************************/
64
65 acpi_status
66 acpi_ev_set_gpe_type (
67 struct acpi_gpe_event_info *gpe_event_info,
68 u8 type)
69 {
70 acpi_status status;
71
72
73 ACPI_FUNCTION_TRACE ("ev_set_gpe_type");
74
75
76 /* Validate type and update register enable masks */
77
78 switch (type) {
79 case ACPI_GPE_TYPE_WAKE:
80 case ACPI_GPE_TYPE_RUNTIME:
81 case ACPI_GPE_TYPE_WAKE_RUN:
82 break;
83
84 default:
85 return_ACPI_STATUS (AE_BAD_PARAMETER);
86 }
87
88 /* Disable the GPE if currently enabled */
89
90 status = acpi_ev_disable_gpe (gpe_event_info);
91
92 /* Type was validated above */
93
94 gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */
95 gpe_event_info->flags |= type; /* Insert type */
96 return_ACPI_STATUS (status);
97 }
98
99
100 /*******************************************************************************
101 *
102 * FUNCTION: acpi_ev_update_gpe_enable_masks
103 *
104 * PARAMETERS: gpe_event_info - GPE to update
105 * Type - What to do: ACPI_GPE_DISABLE or
106 * ACPI_GPE_ENABLE
107 *
108 * RETURN: Status
109 *
110 * DESCRIPTION: Updates GPE register enable masks based on the GPE type
111 *
112 ******************************************************************************/
113
114 acpi_status
115 acpi_ev_update_gpe_enable_masks (
116 struct acpi_gpe_event_info *gpe_event_info,
117 u8 type)
118 {
119 struct acpi_gpe_register_info *gpe_register_info;
120 u8 register_bit;
121
122
123 ACPI_FUNCTION_TRACE ("ev_update_gpe_enable_masks");
124
125
126 gpe_register_info = gpe_event_info->register_info;
127 if (!gpe_register_info) {
128 return_ACPI_STATUS (AE_NOT_EXIST);
129 }
130 register_bit = gpe_event_info->register_bit;
131
132 /* 1) Disable case. Simply clear all enable bits */
133
134 if (type == ACPI_GPE_DISABLE) {
135 ACPI_CLEAR_BIT (gpe_register_info->enable_for_wake, register_bit);
136 ACPI_CLEAR_BIT (gpe_register_info->enable_for_run, register_bit);
137 return_ACPI_STATUS (AE_OK);
138 }
139
140 /* 2) Enable case. Set/Clear the appropriate enable bits */
141
142 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
143 case ACPI_GPE_TYPE_WAKE:
144 ACPI_SET_BIT (gpe_register_info->enable_for_wake, register_bit);
145 ACPI_CLEAR_BIT (gpe_register_info->enable_for_run, register_bit);
146 break;
147
148 case ACPI_GPE_TYPE_RUNTIME:
149 ACPI_CLEAR_BIT (gpe_register_info->enable_for_wake, register_bit);
150 ACPI_SET_BIT (gpe_register_info->enable_for_run, register_bit);
151 break;
152
153 case ACPI_GPE_TYPE_WAKE_RUN:
154 ACPI_SET_BIT (gpe_register_info->enable_for_wake, register_bit);
155 ACPI_SET_BIT (gpe_register_info->enable_for_run, register_bit);
156 break;
157
158 default:
159 return_ACPI_STATUS (AE_BAD_PARAMETER);
160 }
161
162 return_ACPI_STATUS (AE_OK);
163 }
164
165
166 /*******************************************************************************
167 *
168 * FUNCTION: acpi_ev_enable_gpe
169 *
170 * PARAMETERS: gpe_event_info - GPE to enable
171 * write_to_hardware - Enable now, or just mark data structs
172 * (WAKE GPEs should be deferred)
173 *
174 * RETURN: Status
175 *
176 * DESCRIPTION: Enable a GPE based on the GPE type
177 *
178 ******************************************************************************/
179
180 acpi_status
181 acpi_ev_enable_gpe (
182 struct acpi_gpe_event_info *gpe_event_info,
183 u8 write_to_hardware)
184 {
185 acpi_status status;
186
187
188 ACPI_FUNCTION_TRACE ("ev_enable_gpe");
189
190
191 /* Make sure HW enable masks are updated */
192
193 status = acpi_ev_update_gpe_enable_masks (gpe_event_info, ACPI_GPE_ENABLE);
194 if (ACPI_FAILURE (status)) {
195 return_ACPI_STATUS (status);
196 }
197
198 /* Mark wake-enabled or HW enable, or both */
199
200 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
201 case ACPI_GPE_TYPE_WAKE:
202
203 ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
204 break;
205
206 case ACPI_GPE_TYPE_WAKE_RUN:
207
208 ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
209
210 /*lint -fallthrough */
211
212 case ACPI_GPE_TYPE_RUNTIME:
213
214 ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
215
216 if (write_to_hardware) {
217 /* Clear the GPE (of stale events), then enable it */
218
219 status = acpi_hw_clear_gpe (gpe_event_info);
220 if (ACPI_FAILURE (status)) {
221 return_ACPI_STATUS (status);
222 }
223
224 /* Enable the requested runtime GPE */
225
226 status = acpi_hw_write_gpe_enable_reg (gpe_event_info);
227 }
228 break;
229
230 default:
231 return_ACPI_STATUS (AE_BAD_PARAMETER);
232 }
233
234 return_ACPI_STATUS (AE_OK);
235 }
236
237
238 /*******************************************************************************
239 *
240 * FUNCTION: acpi_ev_disable_gpe
241 *
242 * PARAMETERS: gpe_event_info - GPE to disable
243 *
244 * RETURN: Status
245 *
246 * DESCRIPTION: Disable a GPE based on the GPE type
247 *
248 ******************************************************************************/
249
250 acpi_status
251 acpi_ev_disable_gpe (
252 struct acpi_gpe_event_info *gpe_event_info)
253 {
254 acpi_status status;
255
256
257 ACPI_FUNCTION_TRACE ("ev_disable_gpe");
258
259
260 if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) {
261 return_ACPI_STATUS (AE_OK);
262 }
263
264 /* Make sure HW enable masks are updated */
265
266 status = acpi_ev_update_gpe_enable_masks (gpe_event_info, ACPI_GPE_DISABLE);
267 if (ACPI_FAILURE (status)) {
268 return_ACPI_STATUS (status);
269 }
270
271 /* Mark wake-disabled or HW disable, or both */
272
273 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
274 case ACPI_GPE_TYPE_WAKE:
275 ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
276 break;
277
278 case ACPI_GPE_TYPE_WAKE_RUN:
279 ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
280
281 /*lint -fallthrough */
282
283 case ACPI_GPE_TYPE_RUNTIME:
284
285 /* Disable the requested runtime GPE */
286
287 ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
288 status = acpi_hw_write_gpe_enable_reg (gpe_event_info);
289 break;
290
291 default:
292 return_ACPI_STATUS (AE_BAD_PARAMETER);
293 }
294
295 return_ACPI_STATUS (AE_OK);
296 }
297
298
299 /*******************************************************************************
300 *
301 * FUNCTION: acpi_ev_get_gpe_event_info
302 *
303 * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
304 * gpe_number - Raw GPE number
305 *
306 * RETURN: A GPE event_info struct. NULL if not a valid GPE
307 *
308 * DESCRIPTION: Returns the event_info struct associated with this GPE.
309 * Validates the gpe_block and the gpe_number
310 *
311 * Should be called only when the GPE lists are semaphore locked
312 * and not subject to change.
313 *
314 ******************************************************************************/
315
316 struct acpi_gpe_event_info *
317 acpi_ev_get_gpe_event_info (
318 acpi_handle gpe_device,
319 u32 gpe_number)
320 {
321 union acpi_operand_object *obj_desc;
322 struct acpi_gpe_block_info *gpe_block;
323 acpi_native_uint i;
324
325
326 ACPI_FUNCTION_ENTRY ();
327
328
329 /* A NULL gpe_block means use the FADT-defined GPE block(s) */
330
331 if (!gpe_device) {
332 /* Examine GPE Block 0 and 1 (These blocks are permanent) */
333
334 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
335 gpe_block = acpi_gbl_gpe_fadt_blocks[i];
336 if (gpe_block) {
337 if ((gpe_number >= gpe_block->block_base_number) &&
338 (gpe_number < gpe_block->block_base_number + (gpe_block->register_count * 8))) {
339 return (&gpe_block->event_info[gpe_number - gpe_block->block_base_number]);
340 }
341 }
342 }
343
344 /* The gpe_number was not in the range of either FADT GPE block */
345
346 return (NULL);
347 }
348
349 /* A Non-NULL gpe_device means this is a GPE Block Device */
350
351 obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) gpe_device);
352 if (!obj_desc ||
353 !obj_desc->device.gpe_block) {
354 return (NULL);
355 }
356
357 gpe_block = obj_desc->device.gpe_block;
358
359 if ((gpe_number >= gpe_block->block_base_number) &&
360 (gpe_number < gpe_block->block_base_number + (gpe_block->register_count * 8))) {
361 return (&gpe_block->event_info[gpe_number - gpe_block->block_base_number]);
362 }
363
364 return (NULL);
365 }
366
367
368 /*******************************************************************************
369 *
370 * FUNCTION: acpi_ev_gpe_detect
371 *
372 * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt.
373 * Can have multiple GPE blocks attached.
374 *
375 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
376 *
377 * DESCRIPTION: Detect if any GP events have occurred. This function is
378 * executed at interrupt level.
379 *
380 ******************************************************************************/
381
382 u32
383 acpi_ev_gpe_detect (
384 struct acpi_gpe_xrupt_info *gpe_xrupt_list)
385 {
386 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
387 u8 enabled_status_byte;
388 struct acpi_gpe_register_info *gpe_register_info;
389 u32 status_reg;
390 u32 enable_reg;
391 acpi_status status;
392 struct acpi_gpe_block_info *gpe_block;
393 acpi_native_uint i;
394 acpi_native_uint j;
395
396
397 ACPI_FUNCTION_NAME ("ev_gpe_detect");
398
399 /* Check for the case where there are no GPEs */
400
401 if (!gpe_xrupt_list) {
402 return (int_status);
403 }
404
405 /* Examine all GPE blocks attached to this interrupt level */
406
407 acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_ISR);
408 gpe_block = gpe_xrupt_list->gpe_block_list_head;
409 while (gpe_block) {
410 /*
411 * Read all of the 8-bit GPE status and enable registers
412 * in this GPE block, saving all of them.
413 * Find all currently active GP events.
414 */
415 for (i = 0; i < gpe_block->register_count; i++) {
416 /* Get the next status/enable pair */
417
418 gpe_register_info = &gpe_block->register_info[i];
419
420 /* Read the Status Register */
421
422 status = acpi_hw_low_level_read (ACPI_GPE_REGISTER_WIDTH, &status_reg,
423 &gpe_register_info->status_address);
424 if (ACPI_FAILURE (status)) {
425 goto unlock_and_exit;
426 }
427
428 /* Read the Enable Register */
429
430 status = acpi_hw_low_level_read (ACPI_GPE_REGISTER_WIDTH, &enable_reg,
431 &gpe_register_info->enable_address);
432 if (ACPI_FAILURE (status)) {
433 goto unlock_and_exit;
434 }
435
436 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
437 "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n",
438 gpe_register_info->base_gpe_number, status_reg, enable_reg));
439
440 /* First check if there is anything active at all in this register */
441
442 enabled_status_byte = (u8) (status_reg & enable_reg);
443 if (!enabled_status_byte) {
444 /* No active GPEs in this register, move on */
445
446 continue;
447 }
448
449 /* Now look at the individual GPEs in this byte register */
450
451 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
452 /* Examine one GPE bit */
453
454 if (enabled_status_byte & acpi_gbl_decode_to8bit[j]) {
455 /*
456 * Found an active GPE. Dispatch the event to a handler
457 * or method.
458 */
459 int_status |= acpi_ev_gpe_dispatch (
460 &gpe_block->event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j],
461 (u32) j + gpe_register_info->base_gpe_number);
462 }
463 }
464 }
465
466 gpe_block = gpe_block->next;
467 }
468
469 unlock_and_exit:
470
471 acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_ISR);
472 return (int_status);
473 }
474
475
476 /*******************************************************************************
477 *
478 * FUNCTION: acpi_ev_asynch_execute_gpe_method
479 *
480 * PARAMETERS: Context (gpe_event_info) - Info for this GPE
481 *
482 * RETURN: None
483 *
484 * DESCRIPTION: Perform the actual execution of a GPE control method. This
485 * function is called from an invocation of acpi_os_queue_for_execution
486 * (and therefore does NOT execute at interrupt level) so that
487 * the control method itself is not executed in the context of
488 * an interrupt handler.
489 *
490 ******************************************************************************/
491
492 static void ACPI_SYSTEM_XFACE
493 acpi_ev_asynch_execute_gpe_method (
494 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
503 ACPI_FUNCTION_TRACE ("ev_asynch_execute_gpe_method");
504
505
506 status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
507 if (ACPI_FAILURE (status)) {
508 return_VOID;
509 }
510
511 /* Must revalidate the gpe_number/gpe_block */
512
513 if (!acpi_ev_valid_gpe_event (gpe_event_info)) {
514 status = acpi_ut_release_mutex (ACPI_MTX_EVENTS);
515 return_VOID;
516 }
517
518 /* Set the GPE flags for return to enabled state */
519
520 (void) acpi_ev_enable_gpe (gpe_event_info, FALSE);
521
522 /*
523 * Take a snapshot of the GPE info for this level - we copy the
524 * info to prevent a race condition with remove_handler/remove_block.
525 */
526 ACPI_MEMCPY (&local_gpe_event_info, gpe_event_info, sizeof (struct acpi_gpe_event_info));
527
528 status = acpi_ut_release_mutex (ACPI_MTX_EVENTS);
529 if (ACPI_FAILURE (status)) {
530 return_VOID;
531 }
532
533 /*
534 * Must check for control method type dispatch one more
535 * time to avoid race with ev_gpe_install_handler
536 */
537 if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) == 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 = ACPI_CAST_PTR (union acpi_operand_object *, gpe_event_info);
544 info.parameter_type = ACPI_PARAM_GPE;
545
546 status = acpi_ns_evaluate_by_handle (&info);
547 if (ACPI_FAILURE (status)) {
548 ACPI_REPORT_ERROR ((
549 "%s while evaluating method [%4.4s] for GPE[%2X]\n",
550 acpi_format_exception (status),
551 acpi_ut_get_node_name (local_gpe_event_info.dispatch.method_node),
552 gpe_number));
553 }
554 }
555
556 if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) {
557 /*
558 * GPE is level-triggered, we clear the GPE status bit after
559 * handling the event.
560 */
561 status = acpi_hw_clear_gpe (&local_gpe_event_info);
562 if (ACPI_FAILURE (status)) {
563 return_VOID;
564 }
565 }
566
567 /* Enable this GPE */
568
569 (void) acpi_hw_write_gpe_enable_reg (&local_gpe_event_info);
570 return_VOID;
571 }
572
573
574 /*******************************************************************************
575 *
576 * FUNCTION: acpi_ev_gpe_dispatch
577 *
578 * PARAMETERS: gpe_event_info - info for this GPE
579 * gpe_number - Number relative to the parent GPE block
580 *
581 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
582 *
583 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
584 * or method (e.g. _Lxx/_Exx) handler.
585 *
586 * This function executes at interrupt level.
587 *
588 ******************************************************************************/
589
590 u32
591 acpi_ev_gpe_dispatch (
592 struct acpi_gpe_event_info *gpe_event_info,
593 u32 gpe_number)
594 {
595 acpi_status status;
596
597
598 ACPI_FUNCTION_TRACE ("ev_gpe_dispatch");
599
600
601 /*
602 * If edge-triggered, clear the GPE status bit now. Note that
603 * level-triggered events are cleared after the GPE is serviced.
604 */
605 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_EDGE_TRIGGERED) {
606 status = acpi_hw_clear_gpe (gpe_event_info);
607 if (ACPI_FAILURE (status)) {
608 ACPI_REPORT_ERROR (("acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n",
609 acpi_format_exception (status), gpe_number));
610 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
611 }
612 }
613
614 /* Save current system state */
615
616 if (acpi_gbl_system_awake_and_running) {
617 ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
618 }
619 else {
620 ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
621 }
622
623 /*
624 * Dispatch the GPE to either an installed handler, or the control
625 * method associated with this GPE (_Lxx or _Exx).
626 * If a handler exists, we invoke it and do not attempt to run the method.
627 * If there is neither a handler nor a method, we disable the level to
628 * prevent further events from coming in here.
629 */
630 switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
631 case ACPI_GPE_DISPATCH_HANDLER:
632
633 /*
634 * Invoke the installed handler (at interrupt level)
635 * Ignore return status for now. TBD: leave GPE disabled on error?
636 */
637 (void) gpe_event_info->dispatch.handler->address (
638 gpe_event_info->dispatch.handler->context);
639
640 /* It is now safe to clear level-triggered events. */
641
642 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) {
643 status = acpi_hw_clear_gpe (gpe_event_info);
644 if (ACPI_FAILURE (status)) {
645 ACPI_REPORT_ERROR ((
646 "acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n",
647 acpi_format_exception (status), gpe_number));
648 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
649 }
650 }
651 break;
652
653 case ACPI_GPE_DISPATCH_METHOD:
654
655 /*
656 * Disable GPE, so it doesn't keep firing before the method has a
657 * chance to run.
658 */
659 status = acpi_ev_disable_gpe (gpe_event_info);
660 if (ACPI_FAILURE (status)) {
661 ACPI_REPORT_ERROR ((
662 "acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n",
663 acpi_format_exception (status), gpe_number));
664 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
665 }
666
667 /*
668 * Execute the method associated with the GPE
669 * NOTE: Level-triggered GPEs are cleared after the method completes.
670 */
671 status = acpi_os_queue_for_execution (OSD_PRIORITY_GPE,
672 acpi_ev_asynch_execute_gpe_method, gpe_event_info);
673 if (ACPI_FAILURE (status)) {
674 ACPI_REPORT_ERROR ((
675 "acpi_ev_gpe_dispatch: %s, Unable to queue handler for GPE[%2X] - event disabled\n",
676 acpi_format_exception (status), gpe_number));
677 }
678 break;
679
680 default:
681
682 /* No handler or method to run! */
683
684 ACPI_REPORT_ERROR ((
685 "acpi_ev_gpe_dispatch: No handler or method for GPE[%2X], disabling event\n",
686 gpe_number));
687
688 /*
689 * Disable the GPE. The GPE will remain disabled until the ACPI
690 * Core Subsystem is restarted, or a handler is installed.
691 */
692 status = acpi_ev_disable_gpe (gpe_event_info);
693 if (ACPI_FAILURE (status)) {
694 ACPI_REPORT_ERROR ((
695 "acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n",
696 acpi_format_exception (status), gpe_number));
697 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
698 }
699 break;
700 }
701
702 return_VALUE (ACPI_INTERRUPT_HANDLED);
703 }
704
705
706 #ifdef ACPI_GPE_NOTIFY_CHECK
707
708 /*******************************************************************************
709 * TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED
710 *
711 * FUNCTION: acpi_ev_check_for_wake_only_gpe
712 *
713 * PARAMETERS: gpe_event_info - info for this GPE
714 *
715 * RETURN: Status
716 *
717 * DESCRIPTION: Determine if a a GPE is "wake-only".
718 *
719 * Called from Notify() code in interpreter when a "device_wake"
720 * Notify comes in.
721 *
722 ******************************************************************************/
723
724 acpi_status
725 acpi_ev_check_for_wake_only_gpe (
726 struct acpi_gpe_event_info *gpe_event_info)
727 {
728 acpi_status status;
729
730
731 ACPI_FUNCTION_TRACE ("ev_check_for_wake_only_gpe");
732
733
734 if ((gpe_event_info) && /* Only >0 for _Lxx/_Exx */
735 ((gpe_event_info->flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) /* System state at GPE time */ {
736 /* This must be a wake-only GPE, disable it */
737
738 status = acpi_ev_disable_gpe (gpe_event_info);
739
740 /* Set GPE to wake-only. Do not change wake disabled/enabled status */
741
742 acpi_ev_set_gpe_type (gpe_event_info, ACPI_GPE_TYPE_WAKE);
743
744 ACPI_REPORT_INFO (("GPE %p was updated from wake/run to wake-only\n",
745 gpe_event_info));
746
747 /* This was a wake-only GPE */
748
749 return_ACPI_STATUS (AE_WAKE_ONLY_GPE);
750 }
751
752 return_ACPI_STATUS (AE_OK);
753 }
754 #endif
755
756
kernel source for telekom puls (alcatel/mediatek)