?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / acpi / events / evrgnini.c
blob400d90fca966ca9c08aa2c68233d56f47790bc00
1 /******************************************************************************
2 *
3 * Module Name: evrgnini- ACPI address_space (op_region) init
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("evrgnini")
50
51 /* Local prototypes */
52 static u8 acpi_ev_match_pci_root_bridge(char *id);
53
54 static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
55
56 /*******************************************************************************
57 *
58 * FUNCTION: acpi_ev_system_memory_region_setup
59 *
60 * PARAMETERS: Handle - Region we are interested in
61 * Function - Start or stop
62 * handler_context - Address space handler context
63 * region_context - Region specific context
64 *
65 * RETURN: Status
66 *
67 * DESCRIPTION: Setup a system_memory operation region
68 *
69 ******************************************************************************/
70
71 acpi_status
72 acpi_ev_system_memory_region_setup(acpi_handle handle,
73 u32 function,
74 void *handler_context, void **region_context)
75 {
76 union acpi_operand_object *region_desc =
77 (union acpi_operand_object *)handle;
78 struct acpi_mem_space_context *local_region_context;
79
80 ACPI_FUNCTION_TRACE(ev_system_memory_region_setup);
81
82 if (function == ACPI_REGION_DEACTIVATE) {
83 if (*region_context) {
84 local_region_context =
85 (struct acpi_mem_space_context *)*region_context;
86
87 /* Delete a cached mapping if present */
88
89 if (local_region_context->mapped_length) {
90 acpi_os_unmap_memory(local_region_context->
91 mapped_logical_address,
92 local_region_context->
93 mapped_length);
94 }
95 ACPI_FREE(local_region_context);
96 *region_context = NULL;
97 }
98 return_ACPI_STATUS(AE_OK);
99 }
100
101 /* Create a new context */
102
103 local_region_context =
104 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context));
105 if (!(local_region_context)) {
106 return_ACPI_STATUS(AE_NO_MEMORY);
107 }
108
109 /* Save the region length and address for use in the handler */
110
111 local_region_context->length = region_desc->region.length;
112 local_region_context->address = region_desc->region.address;
113
114 *region_context = local_region_context;
115 return_ACPI_STATUS(AE_OK);
116 }
117
118 /*******************************************************************************
119 *
120 * FUNCTION: acpi_ev_io_space_region_setup
121 *
122 * PARAMETERS: Handle - Region we are interested in
123 * Function - Start or stop
124 * handler_context - Address space handler context
125 * region_context - Region specific context
126 *
127 * RETURN: Status
128 *
129 * DESCRIPTION: Setup a IO operation region
130 *
131 ******************************************************************************/
132
133 acpi_status
134 acpi_ev_io_space_region_setup(acpi_handle handle,
135 u32 function,
136 void *handler_context, void **region_context)
137 {
138 ACPI_FUNCTION_TRACE(ev_io_space_region_setup);
139
140 if (function == ACPI_REGION_DEACTIVATE) {
141 *region_context = NULL;
142 } else {
143 *region_context = handler_context;
144 }
145
146 return_ACPI_STATUS(AE_OK);
147 }
148
149 /*******************************************************************************
150 *
151 * FUNCTION: acpi_ev_pci_config_region_setup
152 *
153 * PARAMETERS: Handle - Region we are interested in
154 * Function - Start or stop
155 * handler_context - Address space handler context
156 * region_context - Region specific context
157 *
158 * RETURN: Status
159 *
160 * DESCRIPTION: Setup a PCI_Config operation region
161 *
162 * MUTEX: Assumes namespace is not locked
163 *
164 ******************************************************************************/
165
166 acpi_status
167 acpi_ev_pci_config_region_setup(acpi_handle handle,
168 u32 function,
169 void *handler_context, void **region_context)
170 {
171 acpi_status status = AE_OK;
172 acpi_integer pci_value;
173 struct acpi_pci_id *pci_id = *region_context;
174 union acpi_operand_object *handler_obj;
175 struct acpi_namespace_node *parent_node;
176 struct acpi_namespace_node *pci_root_node;
177 struct acpi_namespace_node *pci_device_node;
178 union acpi_operand_object *region_obj =
179 (union acpi_operand_object *)handle;
180
181 ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);
182
183 handler_obj = region_obj->region.handler;
184 if (!handler_obj) {
185 /*
186 * No installed handler. This shouldn't happen because the dispatch
187 * routine checks before we get here, but we check again just in case.
188 */
189 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
190 "Attempting to init a region %p, with no handler\n",
191 region_obj));
192 return_ACPI_STATUS(AE_NOT_EXIST);
193 }
194
195 *region_context = NULL;
196 if (function == ACPI_REGION_DEACTIVATE) {
197 if (pci_id) {
198 ACPI_FREE(pci_id);
199 }
200 return_ACPI_STATUS(status);
201 }
202
203 parent_node = acpi_ns_get_parent_node(region_obj->region.node);
204
205 /*
206 * Get the _SEG and _BBN values from the device upon which the handler
207 * is installed.
208 *
209 * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
210 * This is the device the handler has been registered to handle.
211 */
212
213 /*
214 * If the address_space.Node is still pointing to the root, we need
215 * to scan upward for a PCI Root bridge and re-associate the op_region
216 * handlers with that device.
217 */
218 if (handler_obj->address_space.node == acpi_gbl_root_node) {
219
220 /* Start search from the parent object */
221
222 pci_root_node = parent_node;
223 while (pci_root_node != acpi_gbl_root_node) {
224
225 /* Get the _HID/_CID in order to detect a root_bridge */
226
227 if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
228
229 /* Install a handler for this PCI root bridge */
230
231 status =
232 acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
233 if (ACPI_FAILURE(status)) {
234 if (status == AE_SAME_HANDLER) {
235 /*
236 * It is OK if the handler is already installed on the root
237 * bridge. Still need to return a context object for the
238 * new PCI_Config operation region, however.
239 */
240 status = AE_OK;
241 } else {
242 ACPI_EXCEPTION((AE_INFO, status,
243 "Could not install PciConfig handler for Root Bridge %4.4s",
244 acpi_ut_get_node_name
245 (pci_root_node)));
246 }
247 }
248 break;
249 }
250
251 pci_root_node = acpi_ns_get_parent_node(pci_root_node);
252 }
253
254 /* PCI root bridge not found, use namespace root node */
255 } else {
256 pci_root_node = handler_obj->address_space.node;
257 }
258
259 /*
260 * If this region is now initialized, we are done.
261 * (install_address_space_handler could have initialized it)
262 */
263 if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
264 return_ACPI_STATUS(AE_OK);
265 }
266
267 /* Region is still not initialized. Create a new context */
268
269 pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id));
270 if (!pci_id) {
271 return_ACPI_STATUS(AE_NO_MEMORY);
272 }
273
274 /*
275 * For PCI_Config space access, we need the segment, bus,
276 * device and function numbers. Acquire them here.
277 *
278 * Find the parent device object. (This allows the operation region to be
279 * within a subscope under the device, such as a control method.)
280 */
281 pci_device_node = region_obj->region.node;
282 while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
283 pci_device_node = acpi_ns_get_parent_node(pci_device_node);
284 }
285
286 if (!pci_device_node) {
287 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
288 }
289
290 /*
291 * Get the PCI device and function numbers from the _ADR object
292 * contained in the parent's scope.
293 */
294 status =
295 acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, pci_device_node,
296 &pci_value);
297
298 /*
299 * The default is zero, and since the allocation above zeroed
300 * the data, just do nothing on failure.
301 */
302 if (ACPI_SUCCESS(status)) {
303 pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value));
304 pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value));
305 }
306
307 /* The PCI segment number comes from the _SEG method */
308
309 status =
310 acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG, pci_root_node,
311 &pci_value);
312 if (ACPI_SUCCESS(status)) {
313 pci_id->segment = ACPI_LOWORD(pci_value);
314 }
315
316 /* The PCI bus number comes from the _BBN method */
317
318 status =
319 acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN, pci_root_node,
320 &pci_value);
321 if (ACPI_SUCCESS(status)) {
322 pci_id->bus = ACPI_LOWORD(pci_value);
323 }
324
325 /* Complete this device's pci_id */
326
327 acpi_os_derive_pci_id(pci_root_node, region_obj->region.node, &pci_id);
328
329 *region_context = pci_id;
330 return_ACPI_STATUS(AE_OK);
331 }
332
333 /*******************************************************************************
334 *
335 * FUNCTION: acpi_ev_match_pci_root_bridge
336 *
337 * PARAMETERS: Id - The HID/CID in string format
338 *
339 * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
340 *
341 * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
342 *
343 ******************************************************************************/
344
345 static u8 acpi_ev_match_pci_root_bridge(char *id)
346 {
347
348 /*
349 * Check if this is a PCI root.
350 * ACPI 3.0+: check for a PCI Express root also.
351 */
352 if (!(ACPI_STRNCMP(id,
353 PCI_ROOT_HID_STRING,
354 sizeof(PCI_ROOT_HID_STRING))) ||
355 !(ACPI_STRNCMP(id,
356 PCI_EXPRESS_ROOT_HID_STRING,
357 sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) {
358 return (TRUE);
359 }
360
361 return (FALSE);
362 }
363
364 /*******************************************************************************
365 *
366 * FUNCTION: acpi_ev_is_pci_root_bridge
367 *
368 * PARAMETERS: Node - Device node being examined
369 *
370 * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge
371 *
372 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
373 * examining the _HID and _CID for the device.
374 *
375 ******************************************************************************/
376
377 static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
378 {
379 acpi_status status;
380 struct acpi_device_id hid;
381 struct acpi_compatible_id_list *cid;
382 acpi_native_uint i;
383
384 /*
385 * Get the _HID and check for a PCI Root Bridge
386 */
387 status = acpi_ut_execute_HID(node, &hid);
388 if (ACPI_FAILURE(status)) {
389 return (FALSE);
390 }
391
392 if (acpi_ev_match_pci_root_bridge(hid.value)) {
393 return (TRUE);
394 }
395
396 /*
397 * The _HID did not match.
398 * Get the _CID and check for a PCI Root Bridge
399 */
400 status = acpi_ut_execute_CID(node, &cid);
401 if (ACPI_FAILURE(status)) {
402 return (FALSE);
403 }
404
405 /* Check all _CIDs in the returned list */
406
407 for (i = 0; i < cid->count; i++) {
408 if (acpi_ev_match_pci_root_bridge(cid->id[i].value)) {
409 ACPI_FREE(cid);
410 return (TRUE);
411 }
412 }
413
414 ACPI_FREE(cid);
415 return (FALSE);
416 }
417
418 /*******************************************************************************
419 *
420 * FUNCTION: acpi_ev_pci_bar_region_setup
421 *
422 * PARAMETERS: Handle - Region we are interested in
423 * Function - Start or stop
424 * handler_context - Address space handler context
425 * region_context - Region specific context
426 *
427 * RETURN: Status
428 *
429 * DESCRIPTION: Setup a pci_bAR operation region
430 *
431 * MUTEX: Assumes namespace is not locked
432 *
433 ******************************************************************************/
434
435 acpi_status
436 acpi_ev_pci_bar_region_setup(acpi_handle handle,
437 u32 function,
438 void *handler_context, void **region_context)
439 {
440 ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup);
441
442 return_ACPI_STATUS(AE_OK);
443 }
444
445 /*******************************************************************************
446 *
447 * FUNCTION: acpi_ev_cmos_region_setup
448 *
449 * PARAMETERS: Handle - Region we are interested in
450 * Function - Start or stop
451 * handler_context - Address space handler context
452 * region_context - Region specific context
453 *
454 * RETURN: Status
455 *
456 * DESCRIPTION: Setup a CMOS operation region
457 *
458 * MUTEX: Assumes namespace is not locked
459 *
460 ******************************************************************************/
461
462 acpi_status
463 acpi_ev_cmos_region_setup(acpi_handle handle,
464 u32 function,
465 void *handler_context, void **region_context)
466 {
467 ACPI_FUNCTION_TRACE(ev_cmos_region_setup);
468
469 return_ACPI_STATUS(AE_OK);
470 }
471
472 /*******************************************************************************
473 *
474 * FUNCTION: acpi_ev_default_region_setup
475 *
476 * PARAMETERS: Handle - Region we are interested in
477 * Function - Start or stop
478 * handler_context - Address space handler context
479 * region_context - Region specific context
480 *
481 * RETURN: Status
482 *
483 * DESCRIPTION: Default region initialization
484 *
485 ******************************************************************************/
486
487 acpi_status
488 acpi_ev_default_region_setup(acpi_handle handle,
489 u32 function,
490 void *handler_context, void **region_context)
491 {
492 ACPI_FUNCTION_TRACE(ev_default_region_setup);
493
494 if (function == ACPI_REGION_DEACTIVATE) {
495 *region_context = NULL;
496 } else {
497 *region_context = handler_context;
498 }
499
500 return_ACPI_STATUS(AE_OK);
501 }
502
503 /*******************************************************************************
504 *
505 * FUNCTION: acpi_ev_initialize_region
506 *
507 * PARAMETERS: region_obj - Region we are initializing
508 * acpi_ns_locked - Is namespace locked?
509 *
510 * RETURN: Status
511 *
512 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
513 * for execution at a later time
514 *
515 * Get the appropriate address space handler for a newly
516 * created region.
517 *
518 * This also performs address space specific initialization. For
519 * example, PCI regions must have an _ADR object that contains
520 * a PCI address in the scope of the definition. This address is
521 * required to perform an access to PCI config space.
522 *
523 * MUTEX: Interpreter should be unlocked, because we may run the _REG
524 * method for this region.
525 *
526 ******************************************************************************/
527
528 acpi_status
529 acpi_ev_initialize_region(union acpi_operand_object *region_obj,
530 u8 acpi_ns_locked)
531 {
532 union acpi_operand_object *handler_obj;
533 union acpi_operand_object *obj_desc;
534 acpi_adr_space_type space_id;
535 struct acpi_namespace_node *node;
536 acpi_status status;
537 struct acpi_namespace_node *method_node;
538 acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
539 union acpi_operand_object *region_obj2;
540
541 ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);
542
543 if (!region_obj) {
544 return_ACPI_STATUS(AE_BAD_PARAMETER);
545 }
546
547 if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
548 return_ACPI_STATUS(AE_OK);
549 }
550
551 region_obj2 = acpi_ns_get_secondary_object(region_obj);
552 if (!region_obj2) {
553 return_ACPI_STATUS(AE_NOT_EXIST);
554 }
555
556 node = acpi_ns_get_parent_node(region_obj->region.node);
557 space_id = region_obj->region.space_id;
558
559 /* Setup defaults */
560
561 region_obj->region.handler = NULL;
562 region_obj2->extra.method_REG = NULL;
563 region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
564 region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
565
566 /* Find any "_REG" method associated with this region definition */
567
568 status =
569 acpi_ns_search_one_scope(*reg_name_ptr, node, ACPI_TYPE_METHOD,
570 &method_node);
571 if (ACPI_SUCCESS(status)) {
572 /*
573 * The _REG method is optional and there can be only one per region
574 * definition. This will be executed when the handler is attached
575 * or removed
576 */
577 region_obj2->extra.method_REG = method_node;
578 }
579
580 /*
581 * The following loop depends upon the root Node having no parent
582 * ie: acpi_gbl_root_node->parent_entry being set to NULL
583 */
584 while (node) {
585
586 /* Check to see if a handler exists */
587
588 handler_obj = NULL;
589 obj_desc = acpi_ns_get_attached_object(node);
590 if (obj_desc) {
591
592 /* Can only be a handler if the object exists */
593
594 switch (node->type) {
595 case ACPI_TYPE_DEVICE:
596
597 handler_obj = obj_desc->device.handler;
598 break;
599
600 case ACPI_TYPE_PROCESSOR:
601
602 handler_obj = obj_desc->processor.handler;
603 break;
604
605 case ACPI_TYPE_THERMAL:
606
607 handler_obj = obj_desc->thermal_zone.handler;
608 break;
609
610 default:
611 /* Ignore other objects */
612 break;
613 }
614
615 while (handler_obj) {
616
617 /* Is this handler of the correct type? */
618
619 if (handler_obj->address_space.space_id ==
620 space_id) {
621
622 /* Found correct handler */
623
624 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
625 "Found handler %p for region %p in obj %p\n",
626 handler_obj,
627 region_obj,
628 obj_desc));
629
630 status =
631 acpi_ev_attach_region(handler_obj,
632 region_obj,
633 acpi_ns_locked);
634
635 /*
636 * Tell all users that this region is usable by running the _REG
637 * method
638 */
639 if (acpi_ns_locked) {
640 status =
641 acpi_ut_release_mutex
642 (ACPI_MTX_NAMESPACE);
643 if (ACPI_FAILURE(status)) {
644 return_ACPI_STATUS
645 (status);
646 }
647 }
648
649 status =
650 acpi_ev_execute_reg_method
651 (region_obj, 1);
652
653 if (acpi_ns_locked) {
654 status =
655 acpi_ut_acquire_mutex
656 (ACPI_MTX_NAMESPACE);
657 if (ACPI_FAILURE(status)) {
658 return_ACPI_STATUS
659 (status);
660 }
661 }
662
663 return_ACPI_STATUS(AE_OK);
664 }
665
666 /* Try next handler in the list */
667
668 handler_obj = handler_obj->address_space.next;
669 }
670 }
671
672 /*
673 * This node does not have the handler we need;
674 * Pop up one level
675 */
676 node = acpi_ns_get_parent_node(node);
677 }
678
679 /* If we get here, there is no handler for this region */
680
681 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
682 "No handler for RegionType %s(%X) (RegionObj %p)\n",
683 acpi_ut_get_region_name(space_id), space_id,
684 region_obj));
685
686 return_ACPI_STATUS(AE_NOT_EXIST);
687 }
Tomato firmware and modifications.