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allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / acpi / events / evgpeblk.c
blob361ebe6c4a6f0b40cdf9c86acb484eb235862dbd
1 /******************************************************************************
2 *
3 * Module Name: evgpeblk - GPE block creation and initialization.
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2007, 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("evgpeblk")
50
51 /* Local prototypes */
52 static acpi_status
53 acpi_ev_save_method_info(acpi_handle obj_handle,
54 u32 level, void *obj_desc, void **return_value);
55
56 static acpi_status
57 acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
58 u32 level, void *info, void **return_value);
59
60 static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
61 interrupt_number);
62
63 static acpi_status
64 acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
65
66 static acpi_status
67 acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
68 u32 interrupt_number);
69
70 static acpi_status
71 acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block);
72
73 /*******************************************************************************
74 *
75 * FUNCTION: acpi_ev_valid_gpe_event
76 *
77 * PARAMETERS: gpe_event_info - Info for this GPE
78 *
79 * RETURN: TRUE if the gpe_event is valid
80 *
81 * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
82 * Should be called only when the GPE lists are semaphore locked
83 * and not subject to change.
84 *
85 ******************************************************************************/
86
87 u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
88 {
89 struct acpi_gpe_xrupt_info *gpe_xrupt_block;
90 struct acpi_gpe_block_info *gpe_block;
91
92 ACPI_FUNCTION_ENTRY();
93
94 /* No need for spin lock since we are not changing any list elements */
95
96 /* Walk the GPE interrupt levels */
97
98 gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
99 while (gpe_xrupt_block) {
100 gpe_block = gpe_xrupt_block->gpe_block_list_head;
101
102 /* Walk the GPE blocks on this interrupt level */
103
104 while (gpe_block) {
105 if ((&gpe_block->event_info[0] <= gpe_event_info) &&
106 (&gpe_block->
107 event_info[((acpi_size) gpe_block->
108 register_count) * 8] >
109 gpe_event_info)) {
110 return (TRUE);
111 }
112
113 gpe_block = gpe_block->next;
114 }
115
116 gpe_xrupt_block = gpe_xrupt_block->next;
117 }
118
119 return (FALSE);
120 }
121
122 /*******************************************************************************
123 *
124 * FUNCTION: acpi_ev_walk_gpe_list
125 *
126 * PARAMETERS: gpe_walk_callback - Routine called for each GPE block
127 *
128 * RETURN: Status
129 *
130 * DESCRIPTION: Walk the GPE lists.
131 *
132 ******************************************************************************/
133
134 acpi_status acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback)
135 {
136 struct acpi_gpe_block_info *gpe_block;
137 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
138 acpi_status status = AE_OK;
139 acpi_cpu_flags flags;
140
141 ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
142
143 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
144
145 /* Walk the interrupt level descriptor list */
146
147 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
148 while (gpe_xrupt_info) {
149
150 /* Walk all Gpe Blocks attached to this interrupt level */
151
152 gpe_block = gpe_xrupt_info->gpe_block_list_head;
153 while (gpe_block) {
154
155 /* One callback per GPE block */
156
157 status = gpe_walk_callback(gpe_xrupt_info, gpe_block);
158 if (ACPI_FAILURE(status)) {
159 goto unlock_and_exit;
160 }
161
162 gpe_block = gpe_block->next;
163 }
164
165 gpe_xrupt_info = gpe_xrupt_info->next;
166 }
167
168 unlock_and_exit:
169 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
170 return_ACPI_STATUS(status);
171 }
172
173 /*******************************************************************************
174 *
175 * FUNCTION: acpi_ev_delete_gpe_handlers
176 *
177 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
178 * gpe_block - Gpe Block info
179 *
180 * RETURN: Status
181 *
182 * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
183 * Used only prior to termination.
184 *
185 ******************************************************************************/
186
187 acpi_status
188 acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
189 struct acpi_gpe_block_info *gpe_block)
190 {
191 struct acpi_gpe_event_info *gpe_event_info;
192 acpi_native_uint i;
193 acpi_native_uint j;
194
195 ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
196
197 /* Examine each GPE Register within the block */
198
199 for (i = 0; i < gpe_block->register_count; i++) {
200
201 /* Now look at the individual GPEs in this byte register */
202
203 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
204 gpe_event_info =
205 &gpe_block->
206 event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j];
207
208 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
209 ACPI_GPE_DISPATCH_HANDLER) {
210 ACPI_FREE(gpe_event_info->dispatch.handler);
211 gpe_event_info->dispatch.handler = NULL;
212 gpe_event_info->flags &=
213 ~ACPI_GPE_DISPATCH_MASK;
214 }
215 }
216 }
217
218 return_ACPI_STATUS(AE_OK);
219 }
220
221 /*******************************************************************************
222 *
223 * FUNCTION: acpi_ev_save_method_info
224 *
225 * PARAMETERS: Callback from walk_namespace
226 *
227 * RETURN: Status
228 *
229 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
230 * control method under the _GPE portion of the namespace.
231 * Extract the name and GPE type from the object, saving this
232 * information for quick lookup during GPE dispatch
233 *
234 * The name of each GPE control method is of the form:
235 * "_Lxx" or "_Exx"
236 * Where:
237 * L - means that the GPE is level triggered
238 * E - means that the GPE is edge triggered
239 * xx - is the GPE number [in HEX]
240 *
241 ******************************************************************************/
242
243 static acpi_status
244 acpi_ev_save_method_info(acpi_handle obj_handle,
245 u32 level, void *obj_desc, void **return_value)
246 {
247 struct acpi_gpe_block_info *gpe_block = (void *)obj_desc;
248 struct acpi_gpe_event_info *gpe_event_info;
249 u32 gpe_number;
250 char name[ACPI_NAME_SIZE + 1];
251 u8 type;
252 acpi_status status;
253
254 ACPI_FUNCTION_TRACE(ev_save_method_info);
255
256 /*
257 * _Lxx and _Exx GPE method support
258 *
259 * 1) Extract the name from the object and convert to a string
260 */
261 ACPI_MOVE_32_TO_32(name,
262 &((struct acpi_namespace_node *)obj_handle)->name.
263 integer);
264 name[ACPI_NAME_SIZE] = 0;
265
266 /*
267 * 2) Edge/Level determination is based on the 2nd character
268 * of the method name
269 *
270 * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE
271 * if a _PRW object is found that points to this GPE.
272 */
273 switch (name[1]) {
274 case 'L':
275 type = ACPI_GPE_LEVEL_TRIGGERED;
276 break;
277
278 case 'E':
279 type = ACPI_GPE_EDGE_TRIGGERED;
280 break;
281
282 default:
283 /* Unknown method type, just ignore it! */
284
285 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
286 "Ignoring unknown GPE method type: %s (name not of form _Lxx or _Exx)",
287 name));
288 return_ACPI_STATUS(AE_OK);
289 }
290
291 /* Convert the last two characters of the name to the GPE Number */
292
293 gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
294 if (gpe_number == ACPI_UINT32_MAX) {
295
296 /* Conversion failed; invalid method, just ignore it */
297
298 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
299 "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)",
300 name));
301 return_ACPI_STATUS(AE_OK);
302 }
303
304 /* Ensure that we have a valid GPE number for this GPE block */
305
306 if ((gpe_number < gpe_block->block_base_number) ||
307 (gpe_number >=
308 (gpe_block->block_base_number +
309 (gpe_block->register_count * 8)))) {
310 /*
311 * Not valid for this GPE block, just ignore it
312 * However, it may be valid for a different GPE block, since GPE0 and GPE1
313 * methods both appear under \_GPE.
314 */
315 return_ACPI_STATUS(AE_OK);
316 }
317
318 /*
319 * Now we can add this information to the gpe_event_info block
320 * for use during dispatch of this GPE. Default type is RUNTIME, although
321 * this may change when the _PRW methods are executed later.
322 */
323 gpe_event_info =
324 &gpe_block->event_info[gpe_number - gpe_block->block_base_number];
325
326 gpe_event_info->flags = (u8)
327 (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME);
328
329 gpe_event_info->dispatch.method_node =
330 (struct acpi_namespace_node *)obj_handle;
331
332 /* Update enable mask, but don't enable the HW GPE as of yet */
333
334 status = acpi_ev_enable_gpe(gpe_event_info, FALSE);
335
336 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
337 "Registered GPE method %s as GPE number 0x%.2X\n",
338 name, gpe_number));
339 return_ACPI_STATUS(status);
340 }
341
342 /*******************************************************************************
343 *
344 * FUNCTION: acpi_ev_match_prw_and_gpe
345 *
346 * PARAMETERS: Callback from walk_namespace
347 *
348 * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is
349 * not aborted on a single _PRW failure.
350 *
351 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
352 * Device. Run the _PRW method. If present, extract the GPE
353 * number and mark the GPE as a WAKE GPE.
354 *
355 ******************************************************************************/
356
357 static acpi_status
358 acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
359 u32 level, void *info, void **return_value)
360 {
361 struct acpi_gpe_walk_info *gpe_info = (void *)info;
362 struct acpi_namespace_node *gpe_device;
363 struct acpi_gpe_block_info *gpe_block;
364 struct acpi_namespace_node *target_gpe_device;
365 struct acpi_gpe_event_info *gpe_event_info;
366 union acpi_operand_object *pkg_desc;
367 union acpi_operand_object *obj_desc;
368 u32 gpe_number;
369 acpi_status status;
370
371 ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
372
373 /* Check for a _PRW method under this device */
374
375 status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW,
376 ACPI_BTYPE_PACKAGE, &pkg_desc);
377 if (ACPI_FAILURE(status)) {
378
379 /* Ignore all errors from _PRW, we don't want to abort the subsystem */
380
381 return_ACPI_STATUS(AE_OK);
382 }
383
384 /* The returned _PRW package must have at least two elements */
385
386 if (pkg_desc->package.count < 2) {
387 goto cleanup;
388 }
389
390 /* Extract pointers from the input context */
391
392 gpe_device = gpe_info->gpe_device;
393 gpe_block = gpe_info->gpe_block;
394
395 /*
396 * The _PRW object must return a package, we are only interested
397 * in the first element
398 */
399 obj_desc = pkg_desc->package.elements[0];
400
401 if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
402
403 /* Use FADT-defined GPE device (from definition of _PRW) */
404
405 target_gpe_device = acpi_gbl_fadt_gpe_device;
406
407 /* Integer is the GPE number in the FADT described GPE blocks */
408
409 gpe_number = (u32) obj_desc->integer.value;
410 } else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) {
411
412 /* Package contains a GPE reference and GPE number within a GPE block */
413
414 if ((obj_desc->package.count < 2) ||
415 (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) !=
416 ACPI_TYPE_LOCAL_REFERENCE)
417 || (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) !=
418 ACPI_TYPE_INTEGER)) {
419 goto cleanup;
420 }
421
422 /* Get GPE block reference and decode */
423
424 target_gpe_device =
425 obj_desc->package.elements[0]->reference.node;
426 gpe_number = (u32) obj_desc->package.elements[1]->integer.value;
427 } else {
428 /* Unknown type, just ignore it */
429
430 goto cleanup;
431 }
432
433 /*
434 * Is this GPE within this block?
435 *
436 * TRUE iff these conditions are true:
437 * 1) The GPE devices match.
438 * 2) The GPE index(number) is within the range of the Gpe Block
439 * associated with the GPE device.
440 */
441 if ((gpe_device == target_gpe_device) &&
442 (gpe_number >= gpe_block->block_base_number) &&
443 (gpe_number <
444 gpe_block->block_base_number + (gpe_block->register_count * 8))) {
445 gpe_event_info =
446 &gpe_block->event_info[gpe_number -
447 gpe_block->block_base_number];
448
449 /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */
450
451 gpe_event_info->flags &=
452 ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED);
453
454 status =
455 acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE);
456 if (ACPI_FAILURE(status)) {
457 goto cleanup;
458 }
459 status =
460 acpi_ev_update_gpe_enable_masks(gpe_event_info,
461 ACPI_GPE_DISABLE);
462 }
463
464 cleanup:
465 acpi_ut_remove_reference(pkg_desc);
466 return_ACPI_STATUS(AE_OK);
467 }
468
469 /*******************************************************************************
470 *
471 * FUNCTION: acpi_ev_get_gpe_xrupt_block
472 *
473 * PARAMETERS: interrupt_number - Interrupt for a GPE block
474 *
475 * RETURN: A GPE interrupt block
476 *
477 * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
478 * block per unique interrupt level used for GPEs.
479 * Should be called only when the GPE lists are semaphore locked
480 * and not subject to change.
481 *
482 ******************************************************************************/
483
484 static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
485 interrupt_number)
486 {
487 struct acpi_gpe_xrupt_info *next_gpe_xrupt;
488 struct acpi_gpe_xrupt_info *gpe_xrupt;
489 acpi_status status;
490 acpi_cpu_flags flags;
491
492 ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
493
494 /* No need for lock since we are not changing any list elements here */
495
496 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
497 while (next_gpe_xrupt) {
498 if (next_gpe_xrupt->interrupt_number == interrupt_number) {
499 return_PTR(next_gpe_xrupt);
500 }
501
502 next_gpe_xrupt = next_gpe_xrupt->next;
503 }
504
505 /* Not found, must allocate a new xrupt descriptor */
506
507 gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
508 if (!gpe_xrupt) {
509 return_PTR(NULL);
510 }
511
512 gpe_xrupt->interrupt_number = interrupt_number;
513
514 /* Install new interrupt descriptor with spin lock */
515
516 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
517 if (acpi_gbl_gpe_xrupt_list_head) {
518 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
519 while (next_gpe_xrupt->next) {
520 next_gpe_xrupt = next_gpe_xrupt->next;
521 }
522
523 next_gpe_xrupt->next = gpe_xrupt;
524 gpe_xrupt->previous = next_gpe_xrupt;
525 } else {
526 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
527 }
528 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
529
530 /* Install new interrupt handler if not SCI_INT */
531
532 if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
533 status = acpi_os_install_interrupt_handler(interrupt_number,
534 acpi_ev_gpe_xrupt_handler,
535 gpe_xrupt);
536 if (ACPI_FAILURE(status)) {
537 ACPI_ERROR((AE_INFO,
538 "Could not install GPE interrupt handler at level 0x%X",
539 interrupt_number));
540 return_PTR(NULL);
541 }
542 }
543
544 return_PTR(gpe_xrupt);
545 }
546
547 /*******************************************************************************
548 *
549 * FUNCTION: acpi_ev_delete_gpe_xrupt
550 *
551 * PARAMETERS: gpe_xrupt - A GPE interrupt info block
552 *
553 * RETURN: Status
554 *
555 * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
556 * interrupt handler if not the SCI interrupt.
557 *
558 ******************************************************************************/
559
560 static acpi_status
561 acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
562 {
563 acpi_status status;
564 acpi_cpu_flags flags;
565
566 ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
567
568 /* We never want to remove the SCI interrupt handler */
569
570 if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
571 gpe_xrupt->gpe_block_list_head = NULL;
572 return_ACPI_STATUS(AE_OK);
573 }
574
575 /* Disable this interrupt */
576
577 status =
578 acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
579 acpi_ev_gpe_xrupt_handler);
580 if (ACPI_FAILURE(status)) {
581 return_ACPI_STATUS(status);
582 }
583
584 /* Unlink the interrupt block with lock */
585
586 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
587 if (gpe_xrupt->previous) {
588 gpe_xrupt->previous->next = gpe_xrupt->next;
589 } else {
590 /* No previous, update list head */
591
592 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
593 }
594
595 if (gpe_xrupt->next) {
596 gpe_xrupt->next->previous = gpe_xrupt->previous;
597 }
598 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
599
600 /* Free the block */
601
602 ACPI_FREE(gpe_xrupt);
603 return_ACPI_STATUS(AE_OK);
604 }
605
606 /*******************************************************************************
607 *
608 * FUNCTION: acpi_ev_install_gpe_block
609 *
610 * PARAMETERS: gpe_block - New GPE block
611 * interrupt_number - Xrupt to be associated with this GPE block
612 *
613 * RETURN: Status
614 *
615 * DESCRIPTION: Install new GPE block with mutex support
616 *
617 ******************************************************************************/
618
619 static acpi_status
620 acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
621 u32 interrupt_number)
622 {
623 struct acpi_gpe_block_info *next_gpe_block;
624 struct acpi_gpe_xrupt_info *gpe_xrupt_block;
625 acpi_status status;
626 acpi_cpu_flags flags;
627
628 ACPI_FUNCTION_TRACE(ev_install_gpe_block);
629
630 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
631 if (ACPI_FAILURE(status)) {
632 return_ACPI_STATUS(status);
633 }
634
635 gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number);
636 if (!gpe_xrupt_block) {
637 status = AE_NO_MEMORY;
638 goto unlock_and_exit;
639 }
640
641 /* Install the new block at the end of the list with lock */
642
643 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
644 if (gpe_xrupt_block->gpe_block_list_head) {
645 next_gpe_block = gpe_xrupt_block->gpe_block_list_head;
646 while (next_gpe_block->next) {
647 next_gpe_block = next_gpe_block->next;
648 }
649
650 next_gpe_block->next = gpe_block;
651 gpe_block->previous = next_gpe_block;
652 } else {
653 gpe_xrupt_block->gpe_block_list_head = gpe_block;
654 }
655
656 gpe_block->xrupt_block = gpe_xrupt_block;
657 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
658
659 unlock_and_exit:
660 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
661 return_ACPI_STATUS(status);
662 }
663
664 /*******************************************************************************
665 *
666 * FUNCTION: acpi_ev_delete_gpe_block
667 *
668 * PARAMETERS: gpe_block - Existing GPE block
669 *
670 * RETURN: Status
671 *
672 * DESCRIPTION: Remove a GPE block
673 *
674 ******************************************************************************/
675
676 acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block)
677 {
678 acpi_status status;
679 acpi_cpu_flags flags;
680
681 ACPI_FUNCTION_TRACE(ev_install_gpe_block);
682
683 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
684 if (ACPI_FAILURE(status)) {
685 return_ACPI_STATUS(status);
686 }
687
688 /* Disable all GPEs in this block */
689
690 status = acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block);
691
692 if (!gpe_block->previous && !gpe_block->next) {
693
694 /* This is the last gpe_block on this interrupt */
695
696 status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block);
697 if (ACPI_FAILURE(status)) {
698 goto unlock_and_exit;
699 }
700 } else {
701 /* Remove the block on this interrupt with lock */
702
703 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
704 if (gpe_block->previous) {
705 gpe_block->previous->next = gpe_block->next;
706 } else {
707 gpe_block->xrupt_block->gpe_block_list_head =
708 gpe_block->next;
709 }
710
711 if (gpe_block->next) {
712 gpe_block->next->previous = gpe_block->previous;
713 }
714 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
715 }
716
717 /* Free the gpe_block */
718
719 ACPI_FREE(gpe_block->register_info);
720 ACPI_FREE(gpe_block->event_info);
721 ACPI_FREE(gpe_block);
722
723 unlock_and_exit:
724 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
725 return_ACPI_STATUS(status);
726 }
727
728 /*******************************************************************************
729 *
730 * FUNCTION: acpi_ev_create_gpe_info_blocks
731 *
732 * PARAMETERS: gpe_block - New GPE block
733 *
734 * RETURN: Status
735 *
736 * DESCRIPTION: Create the register_info and event_info blocks for this GPE block
737 *
738 ******************************************************************************/
739
740 static acpi_status
741 acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
742 {
743 struct acpi_gpe_register_info *gpe_register_info = NULL;
744 struct acpi_gpe_event_info *gpe_event_info = NULL;
745 struct acpi_gpe_event_info *this_event;
746 struct acpi_gpe_register_info *this_register;
747 acpi_native_uint i;
748 acpi_native_uint j;
749 acpi_status status;
750
751 ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks);
752
753 /* Allocate the GPE register information block */
754
755 gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block->
756 register_count *
757 sizeof(struct
758 acpi_gpe_register_info));
759 if (!gpe_register_info) {
760 ACPI_ERROR((AE_INFO,
761 "Could not allocate the GpeRegisterInfo table"));
762 return_ACPI_STATUS(AE_NO_MEMORY);
763 }
764
765 /*
766 * Allocate the GPE event_info block. There are eight distinct GPEs
767 * per register. Initialization to zeros is sufficient.
768 */
769 gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block->
770 register_count *
771 ACPI_GPE_REGISTER_WIDTH) *
772 sizeof(struct
773 acpi_gpe_event_info));
774 if (!gpe_event_info) {
775 ACPI_ERROR((AE_INFO,
776 "Could not allocate the GpeEventInfo table"));
777 status = AE_NO_MEMORY;
778 goto error_exit;
779 }
780
781 /* Save the new Info arrays in the GPE block */
782
783 gpe_block->register_info = gpe_register_info;
784 gpe_block->event_info = gpe_event_info;
785
786 /*
787 * Initialize the GPE Register and Event structures. A goal of these
788 * tables is to hide the fact that there are two separate GPE register sets
789 * in a given GPE hardware block, the status registers occupy the first half,
790 * and the enable registers occupy the second half.
791 */
792 this_register = gpe_register_info;
793 this_event = gpe_event_info;
794
795 for (i = 0; i < gpe_block->register_count; i++) {
796
797 /* Init the register_info for this GPE register (8 GPEs) */
798
799 this_register->base_gpe_number =
800 (u8) (gpe_block->block_base_number +
801 (i * ACPI_GPE_REGISTER_WIDTH));
802
803 this_register->status_address.address =
804 gpe_block->block_address.address + i;
805
806 this_register->enable_address.address =
807 gpe_block->block_address.address + i +
808 gpe_block->register_count;
809
810 this_register->status_address.space_id =
811 gpe_block->block_address.space_id;
812 this_register->enable_address.space_id =
813 gpe_block->block_address.space_id;
814 this_register->status_address.bit_width =
815 ACPI_GPE_REGISTER_WIDTH;
816 this_register->enable_address.bit_width =
817 ACPI_GPE_REGISTER_WIDTH;
818 this_register->status_address.bit_offset =
819 ACPI_GPE_REGISTER_WIDTH;
820 this_register->enable_address.bit_offset =
821 ACPI_GPE_REGISTER_WIDTH;
822
823 /* Init the event_info for each GPE within this register */
824
825 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
826 this_event->gpe_number =
827 (u8) (this_register->base_gpe_number + j);
828 this_event->register_info = this_register;
829 this_event++;
830 }
831
832 /* Disable all GPEs within this register */
833
834 status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0x00,
835 &this_register->
836 enable_address);
837 if (ACPI_FAILURE(status)) {
838 goto error_exit;
839 }
840
841 /* Clear any pending GPE events within this register */
842
843 status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0xFF,
844 &this_register->
845 status_address);
846 if (ACPI_FAILURE(status)) {
847 goto error_exit;
848 }
849
850 this_register++;
851 }
852
853 return_ACPI_STATUS(AE_OK);
854
855 error_exit:
856 if (gpe_register_info) {
857 ACPI_FREE(gpe_register_info);
858 }
859 if (gpe_event_info) {
860 ACPI_FREE(gpe_event_info);
861 }
862
863 return_ACPI_STATUS(status);
864 }
865
866 /*******************************************************************************
867 *
868 * FUNCTION: acpi_ev_create_gpe_block
869 *
870 * PARAMETERS: gpe_device - Handle to the parent GPE block
871 * gpe_block_address - Address and space_iD
872 * register_count - Number of GPE register pairs in the block
873 * gpe_block_base_number - Starting GPE number for the block
874 * interrupt_number - H/W interrupt for the block
875 * return_gpe_block - Where the new block descriptor is returned
876 *
877 * RETURN: Status
878 *
879 * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
880 * the block are disabled at exit.
881 * Note: Assumes namespace is locked.
882 *
883 ******************************************************************************/
884
885 acpi_status
886 acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
887 struct acpi_generic_address *gpe_block_address,
888 u32 register_count,
889 u8 gpe_block_base_number,
890 u32 interrupt_number,
891 struct acpi_gpe_block_info **return_gpe_block)
892 {
893 acpi_status status;
894 struct acpi_gpe_block_info *gpe_block;
895
896 ACPI_FUNCTION_TRACE(ev_create_gpe_block);
897
898 if (!register_count) {
899 return_ACPI_STATUS(AE_OK);
900 }
901
902 /* Allocate a new GPE block */
903
904 gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info));
905 if (!gpe_block) {
906 return_ACPI_STATUS(AE_NO_MEMORY);
907 }
908
909 /* Initialize the new GPE block */
910
911 gpe_block->node = gpe_device;
912 gpe_block->register_count = register_count;
913 gpe_block->block_base_number = gpe_block_base_number;
914
915 ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address,
916 sizeof(struct acpi_generic_address));
917
918 /*
919 * Create the register_info and event_info sub-structures
920 * Note: disables and clears all GPEs in the block
921 */
922 status = acpi_ev_create_gpe_info_blocks(gpe_block);
923 if (ACPI_FAILURE(status)) {
924 ACPI_FREE(gpe_block);
925 return_ACPI_STATUS(status);
926 }
927
928 /* Install the new block in the global lists */
929
930 status = acpi_ev_install_gpe_block(gpe_block, interrupt_number);
931 if (ACPI_FAILURE(status)) {
932 ACPI_FREE(gpe_block);
933 return_ACPI_STATUS(status);
934 }
935
936 /* Find all GPE methods (_Lxx, _Exx) for this block */
937
938 status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device,
939 ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
940 acpi_ev_save_method_info, gpe_block,
941 NULL);
942
943 /* Return the new block */
944
945 if (return_gpe_block) {
946 (*return_gpe_block) = gpe_block;
947 }
948
949 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
950 "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
951 (u32) gpe_block->block_base_number,
952 (u32) (gpe_block->block_base_number +
953 ((gpe_block->register_count *
954 ACPI_GPE_REGISTER_WIDTH) - 1)),
955 gpe_device->name.ascii, gpe_block->register_count,
956 interrupt_number));
957
958 return_ACPI_STATUS(AE_OK);
959 }
960
961 /*******************************************************************************
962 *
963 * FUNCTION: acpi_ev_initialize_gpe_block
964 *
965 * PARAMETERS: gpe_device - Handle to the parent GPE block
966 * gpe_block - Gpe Block info
967 *
968 * RETURN: Status
969 *
970 * DESCRIPTION: Initialize and enable a GPE block. First find and run any
971 * _PRT methods associated with the block, then enable the
972 * appropriate GPEs.
973 * Note: Assumes namespace is locked.
974 *
975 ******************************************************************************/
976
977 acpi_status
978 acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
979 struct acpi_gpe_block_info *gpe_block)
980 {
981 acpi_status status;
982 struct acpi_gpe_event_info *gpe_event_info;
983 struct acpi_gpe_walk_info gpe_info;
984 u32 wake_gpe_count;
985 u32 gpe_enabled_count;
986 acpi_native_uint i;
987 acpi_native_uint j;
988
989 ACPI_FUNCTION_TRACE(ev_initialize_gpe_block);
990
991 /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */
992
993 if (!gpe_block) {
994 return_ACPI_STATUS(AE_OK);
995 }
996
997 /*
998 * Runtime option: Should wake GPEs be enabled at runtime? The default
999 * is no, they should only be enabled just as the machine goes to sleep.
1000 */
1001 if (acpi_gbl_leave_wake_gpes_disabled) {
1002 /*
1003 * Differentiate runtime vs wake GPEs, via the _PRW control methods.
1004 * Each GPE that has one or more _PRWs that reference it is by
1005 * definition a wake GPE and will not be enabled while the machine
1006 * is running.
1007 */
1008 gpe_info.gpe_block = gpe_block;
1009 gpe_info.gpe_device = gpe_device;
1010
1011 status =
1012 acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
1013 ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
1014 acpi_ev_match_prw_and_gpe, &gpe_info,
1015 NULL);
1016 }
1017
1018 /*
1019 * Enable all GPEs in this block that have these attributes:
1020 * 1) are "runtime" or "run/wake" GPEs, and
1021 * 2) have a corresponding _Lxx or _Exx method
1022 *
1023 * Any other GPEs within this block must be enabled via the acpi_enable_gpe()
1024 * external interface.
1025 */
1026 wake_gpe_count = 0;
1027 gpe_enabled_count = 0;
1028
1029 for (i = 0; i < gpe_block->register_count; i++) {
1030 for (j = 0; j < 8; j++) {
1031
1032 /* Get the info block for this particular GPE */
1033
1034 gpe_event_info =
1035 &gpe_block->
1036 event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j];
1037
1038 if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
1039 ACPI_GPE_DISPATCH_METHOD)
1040 && (gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) {
1041 gpe_enabled_count++;
1042 }
1043
1044 if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) {
1045 wake_gpe_count++;
1046 }
1047 }
1048 }
1049
1050 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
1051 "Found %u Wake, Enabled %u Runtime GPEs in this block\n",
1052 wake_gpe_count, gpe_enabled_count));
1053
1054 /* Enable all valid runtime GPEs found above */
1055
1056 status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block);
1057 if (ACPI_FAILURE(status)) {
1058 ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p",
1059 gpe_block));
1060 }
1061
1062 return_ACPI_STATUS(status);
1063 }
1064
1065 /*******************************************************************************
1066 *
1067 * FUNCTION: acpi_ev_gpe_initialize
1068 *
1069 * PARAMETERS: None
1070 *
1071 * RETURN: Status
1072 *
1073 * DESCRIPTION: Initialize the GPE data structures
1074 *
1075 ******************************************************************************/
1076
1077 acpi_status acpi_ev_gpe_initialize(void)
1078 {
1079 u32 register_count0 = 0;
1080 u32 register_count1 = 0;
1081 u32 gpe_number_max = 0;
1082 acpi_status status;
1083
1084 ACPI_FUNCTION_TRACE(ev_gpe_initialize);
1085
1086 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
1087 if (ACPI_FAILURE(status)) {
1088 return_ACPI_STATUS(status);
1089 }
1090
1091 /*
1092 * Initialize the GPE Block(s) defined in the FADT
1093 *
1094 * Why the GPE register block lengths are divided by 2: From the ACPI Spec,
1095 * section "General-Purpose Event Registers", we have:
1096 *
1097 * "Each register block contains two registers of equal length
1098 * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
1099 * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
1100 * The length of the GPE1_STS and GPE1_EN registers is equal to
1101 * half the GPE1_LEN. If a generic register block is not supported
1102 * then its respective block pointer and block length values in the
1103 * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
1104 * to be the same size."
1105 */
1106
1107 /*
1108 * Determine the maximum GPE number for this machine.
1109 *
1110 * Note: both GPE0 and GPE1 are optional, and either can exist without
1111 * the other.
1112 *
1113 * If EITHER the register length OR the block address are zero, then that
1114 * particular block is not supported.
1115 */
1116 if (acpi_gbl_FADT.gpe0_block_length &&
1117 acpi_gbl_FADT.xgpe0_block.address) {
1118
1119 /* GPE block 0 exists (has both length and address > 0) */
1120
1121 register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2);
1122
1123 gpe_number_max =
1124 (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
1125
1126 /* Install GPE Block 0 */
1127
1128 status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
1129 &acpi_gbl_FADT.xgpe0_block,
1130 register_count0, 0,
1131 acpi_gbl_FADT.sci_interrupt,
1132 &acpi_gbl_gpe_fadt_blocks[0]);
1133
1134 if (ACPI_FAILURE(status)) {
1135 ACPI_EXCEPTION((AE_INFO, status,
1136 "Could not create GPE Block 0"));
1137 }
1138 }
1139
1140 if (acpi_gbl_FADT.gpe1_block_length &&
1141 acpi_gbl_FADT.xgpe1_block.address) {
1142
1143 /* GPE block 1 exists (has both length and address > 0) */
1144
1145 register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2);
1146
1147 /* Check for GPE0/GPE1 overlap (if both banks exist) */
1148
1149 if ((register_count0) &&
1150 (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
1151 ACPI_ERROR((AE_INFO,
1152 "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1",
1153 gpe_number_max, acpi_gbl_FADT.gpe1_base,
1154 acpi_gbl_FADT.gpe1_base +
1155 ((register_count1 *
1156 ACPI_GPE_REGISTER_WIDTH) - 1)));
1157
1158 /* Ignore GPE1 block by setting the register count to zero */
1159
1160 register_count1 = 0;
1161 } else {
1162 /* Install GPE Block 1 */
1163
1164 status =
1165 acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
1166 &acpi_gbl_FADT.xgpe1_block,
1167 register_count1,
1168 acpi_gbl_FADT.gpe1_base,
1169 acpi_gbl_FADT.
1170 sci_interrupt,
1171 &acpi_gbl_gpe_fadt_blocks
1172 [1]);
1173
1174 if (ACPI_FAILURE(status)) {
1175 ACPI_EXCEPTION((AE_INFO, status,
1176 "Could not create GPE Block 1"));
1177 }
1178
1179 /*
1180 * GPE0 and GPE1 do not have to be contiguous in the GPE number
1181 * space. However, GPE0 always starts at GPE number zero.
1182 */
1183 gpe_number_max = acpi_gbl_FADT.gpe1_base +
1184 ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
1185 }
1186 }
1187
1188 /* Exit if there are no GPE registers */
1189
1190 if ((register_count0 + register_count1) == 0) {
1191
1192 /* GPEs are not required by ACPI, this is OK */
1193
1194 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
1195 "There are no GPE blocks defined in the FADT\n"));
1196 status = AE_OK;
1197 goto cleanup;
1198 }
1199
1200 /* Check for Max GPE number out-of-range */
1201
1202 if (gpe_number_max > ACPI_GPE_MAX) {
1203 ACPI_ERROR((AE_INFO,
1204 "Maximum GPE number from FADT is too large: 0x%X",
1205 gpe_number_max));
1206 status = AE_BAD_VALUE;
1207 goto cleanup;
1208 }
1209
1210 cleanup:
1211 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
1212 return_ACPI_STATUS(AE_OK);
1213 }
Tomato firmware and modifications.