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3cfd53d5 LM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
b4e104ea | 8 | * Copyright (C) 2000 - 2011, Intel Corp. |
3cfd53d5 LM |
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 "accommon.h" | |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
48 | ||
49 | #define _COMPONENT ACPI_EVENTS | |
50 | ACPI_MODULE_NAME("evxfgpe") | |
51 | ||
52 | /****************************************************************************** | |
53 | * | |
3a37898d | 54 | * FUNCTION: acpi_update_all_gpes |
3cfd53d5 LM |
55 | * |
56 | * PARAMETERS: None | |
57 | * | |
da503373 LM |
58 | * RETURN: Status |
59 | * | |
60 | * DESCRIPTION: Complete GPE initialization and enable all GPEs that have | |
61 | * associated _Lxx or _Exx methods and are not pointed to by any | |
62 | * device _PRW methods (this indicates that these GPEs are | |
63 | * generally intended for system or device wakeup. Such GPEs | |
64 | * have to be enabled directly when the devices whose _PRW | |
65 | * methods point to them are set up for wakeup signaling.) | |
3cfd53d5 | 66 | * |
da503373 LM |
67 | * NOTE: Should be called after any GPEs are added to the system. Primarily, |
68 | * after the system _PRW methods have been run, but also after a GPE Block | |
69 | * Device has been added or if any new GPE methods have been added via a | |
70 | * dynamic table load. | |
3cfd53d5 LM |
71 | * |
72 | ******************************************************************************/ | |
73 | ||
3a37898d | 74 | acpi_status acpi_update_all_gpes(void) |
3cfd53d5 LM |
75 | { |
76 | acpi_status status; | |
77 | ||
3a37898d | 78 | ACPI_FUNCTION_TRACE(acpi_update_all_gpes); |
3cfd53d5 LM |
79 | |
80 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
81 | if (ACPI_FAILURE(status)) { | |
82 | return_ACPI_STATUS(status); | |
3a37898d LM |
83 | } |
84 | ||
85 | if (acpi_gbl_all_gpes_initialized) { | |
86 | goto unlock_and_exit; | |
3cfd53d5 LM |
87 | } |
88 | ||
89 | status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL); | |
90 | if (ACPI_SUCCESS(status)) { | |
3a37898d | 91 | acpi_gbl_all_gpes_initialized = TRUE; |
3cfd53d5 LM |
92 | } |
93 | ||
3a37898d | 94 | unlock_and_exit: |
3cfd53d5 LM |
95 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
96 | ||
97 | return_ACPI_STATUS(status); | |
98 | } | |
99 | ||
3a37898d LM |
100 | ACPI_EXPORT_SYMBOL(acpi_update_all_gpes) |
101 | ||
3cfd53d5 LM |
102 | /******************************************************************************* |
103 | * | |
104 | * FUNCTION: acpi_enable_gpe | |
105 | * | |
106 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
107 | * gpe_number - GPE level within the GPE block | |
108 | * | |
109 | * RETURN: Status | |
110 | * | |
111 | * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is | |
112 | * hardware-enabled. | |
113 | * | |
114 | ******************************************************************************/ | |
115 | ||
116 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) | |
117 | { | |
118 | acpi_status status = AE_BAD_PARAMETER; | |
119 | struct acpi_gpe_event_info *gpe_event_info; | |
120 | acpi_cpu_flags flags; | |
121 | ||
122 | ACPI_FUNCTION_TRACE(acpi_enable_gpe); | |
123 | ||
124 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
125 | ||
126 | /* Ensure that we have a valid GPE number */ | |
127 | ||
128 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
129 | if (gpe_event_info) { | |
3a37898d | 130 | status = acpi_ev_add_gpe_reference(gpe_event_info); |
3cfd53d5 LM |
131 | } |
132 | ||
133 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
134 | return_ACPI_STATUS(status); | |
135 | } | |
136 | ACPI_EXPORT_SYMBOL(acpi_enable_gpe) | |
137 | ||
138 | /******************************************************************************* | |
139 | * | |
140 | * FUNCTION: acpi_disable_gpe | |
141 | * | |
142 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
143 | * gpe_number - GPE level within the GPE block | |
144 | * | |
145 | * RETURN: Status | |
146 | * | |
147 | * DESCRIPTION: Remove a reference to a GPE. When the last reference is | |
148 | * removed, only then is the GPE disabled (for runtime GPEs), or | |
149 | * the GPE mask bit disabled (for wake GPEs) | |
150 | * | |
151 | ******************************************************************************/ | |
152 | ||
153 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) | |
154 | { | |
155 | acpi_status status = AE_BAD_PARAMETER; | |
156 | struct acpi_gpe_event_info *gpe_event_info; | |
157 | acpi_cpu_flags flags; | |
158 | ||
159 | ACPI_FUNCTION_TRACE(acpi_disable_gpe); | |
160 | ||
161 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
162 | ||
163 | /* Ensure that we have a valid GPE number */ | |
164 | ||
165 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
166 | if (gpe_event_info) { | |
3a37898d | 167 | status = acpi_ev_remove_gpe_reference(gpe_event_info) ; |
3cfd53d5 LM |
168 | } |
169 | ||
170 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
171 | return_ACPI_STATUS(status); | |
172 | } | |
173 | ACPI_EXPORT_SYMBOL(acpi_disable_gpe) | |
174 | ||
bba63a29 | 175 | |
3cfd53d5 LM |
176 | /******************************************************************************* |
177 | * | |
3a37898d | 178 | * FUNCTION: acpi_setup_gpe_for_wake |
3cfd53d5 | 179 | * |
bba63a29 LM |
180 | * PARAMETERS: wake_device - Device associated with the GPE (via _PRW) |
181 | * gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
182 | * gpe_number - GPE level within the GPE block | |
3cfd53d5 LM |
183 | * |
184 | * RETURN: Status | |
185 | * | |
bba63a29 LM |
186 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. This |
187 | * interface is intended to be used as the host executes the | |
188 | * _PRW methods (Power Resources for Wake) in the system tables. | |
189 | * Each _PRW appears under a Device Object (The wake_device), and | |
190 | * contains the info for the wake GPE associated with the | |
191 | * wake_device. | |
3cfd53d5 LM |
192 | * |
193 | ******************************************************************************/ | |
bba63a29 LM |
194 | acpi_status |
195 | acpi_setup_gpe_for_wake(acpi_handle wake_device, | |
196 | acpi_handle gpe_device, u32 gpe_number) | |
3cfd53d5 | 197 | { |
bba63a29 | 198 | acpi_status status = AE_BAD_PARAMETER; |
3cfd53d5 | 199 | struct acpi_gpe_event_info *gpe_event_info; |
bba63a29 | 200 | struct acpi_namespace_node *device_node; |
3cfd53d5 LM |
201 | acpi_cpu_flags flags; |
202 | ||
3a37898d | 203 | ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); |
3cfd53d5 | 204 | |
bba63a29 LM |
205 | /* Parameter Validation */ |
206 | ||
207 | if (!wake_device) { | |
208 | /* | |
209 | * By forcing wake_device to be valid, we automatically enable the | |
210 | * implicit notify feature on all hosts. | |
211 | */ | |
212 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
213 | } | |
214 | ||
3cfd53d5 LM |
215 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
216 | ||
217 | /* Ensure that we have a valid GPE number */ | |
218 | ||
219 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
2d559513 RW |
220 | if (!gpe_event_info) { |
221 | goto unlock_and_exit; | |
222 | } | |
bba63a29 | 223 | |
2d559513 RW |
224 | /* |
225 | * If there is no method or handler for this GPE, then the | |
226 | * wake_device will be notified whenever this GPE fires (aka | |
227 | * "implicit notify") Note: The GPE is assumed to be | |
228 | * level-triggered (for windows compatibility). | |
229 | */ | |
230 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == | |
231 | ACPI_GPE_DISPATCH_NONE) && (wake_device != ACPI_ROOT_OBJECT)) { | |
232 | ||
233 | /* Validate wake_device is of type Device */ | |
234 | ||
235 | device_node = ACPI_CAST_PTR(struct acpi_namespace_node, | |
236 | wake_device); | |
237 | if (device_node->type != ACPI_TYPE_DEVICE) { | |
238 | goto unlock_and_exit; | |
239 | } | |
240 | gpe_event_info->flags = (ACPI_GPE_DISPATCH_NOTIFY | | |
241 | ACPI_GPE_LEVEL_TRIGGERED); | |
242 | gpe_event_info->dispatch.device_node = device_node; | |
3cfd53d5 LM |
243 | } |
244 | ||
2d559513 RW |
245 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
246 | status = AE_OK; | |
247 | ||
248 | unlock_and_exit: | |
3cfd53d5 LM |
249 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
250 | return_ACPI_STATUS(status); | |
251 | } | |
3a37898d | 252 | ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) |
3cfd53d5 LM |
253 | |
254 | /******************************************************************************* | |
255 | * | |
3a37898d | 256 | * FUNCTION: acpi_set_gpe_wake_mask |
3cfd53d5 LM |
257 | * |
258 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
259 | * gpe_number - GPE level within the GPE block | |
260 | * Action - Enable or Disable | |
261 | * | |
262 | * RETURN: Status | |
263 | * | |
da503373 LM |
264 | * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must |
265 | * already be marked as a WAKE GPE. | |
3cfd53d5 LM |
266 | * |
267 | ******************************************************************************/ | |
268 | ||
3a37898d | 269 | acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) |
3cfd53d5 LM |
270 | { |
271 | acpi_status status = AE_OK; | |
272 | struct acpi_gpe_event_info *gpe_event_info; | |
273 | struct acpi_gpe_register_info *gpe_register_info; | |
274 | acpi_cpu_flags flags; | |
275 | u32 register_bit; | |
276 | ||
3a37898d | 277 | ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask); |
3cfd53d5 LM |
278 | |
279 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
280 | ||
da503373 LM |
281 | /* |
282 | * Ensure that we have a valid GPE number and that this GPE is in | |
283 | * fact a wake GPE | |
284 | */ | |
3cfd53d5 | 285 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
3a37898d | 286 | if (!gpe_event_info) { |
3cfd53d5 LM |
287 | status = AE_BAD_PARAMETER; |
288 | goto unlock_and_exit; | |
289 | } | |
290 | ||
3a37898d LM |
291 | if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { |
292 | status = AE_TYPE; | |
293 | goto unlock_and_exit; | |
294 | } | |
295 | ||
3cfd53d5 LM |
296 | gpe_register_info = gpe_event_info->register_info; |
297 | if (!gpe_register_info) { | |
298 | status = AE_NOT_EXIST; | |
299 | goto unlock_and_exit; | |
300 | } | |
301 | ||
302 | register_bit = | |
303 | acpi_hw_get_gpe_register_bit(gpe_event_info, gpe_register_info); | |
304 | ||
305 | /* Perform the action */ | |
306 | ||
307 | switch (action) { | |
308 | case ACPI_GPE_ENABLE: | |
309 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, | |
310 | (u8)register_bit); | |
311 | break; | |
312 | ||
313 | case ACPI_GPE_DISABLE: | |
314 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, | |
315 | (u8)register_bit); | |
316 | break; | |
317 | ||
318 | default: | |
319 | ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); | |
320 | status = AE_BAD_PARAMETER; | |
321 | break; | |
322 | } | |
323 | ||
324 | unlock_and_exit: | |
325 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
326 | return_ACPI_STATUS(status); | |
327 | } | |
328 | ||
3a37898d | 329 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask) |
3cfd53d5 LM |
330 | |
331 | /******************************************************************************* | |
332 | * | |
333 | * FUNCTION: acpi_clear_gpe | |
334 | * | |
335 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
336 | * gpe_number - GPE level within the GPE block | |
337 | * | |
338 | * RETURN: Status | |
339 | * | |
340 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
341 | * | |
342 | ******************************************************************************/ | |
343 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) | |
344 | { | |
345 | acpi_status status = AE_OK; | |
346 | struct acpi_gpe_event_info *gpe_event_info; | |
347 | acpi_cpu_flags flags; | |
348 | ||
349 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); | |
350 | ||
351 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
352 | ||
353 | /* Ensure that we have a valid GPE number */ | |
354 | ||
355 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
356 | if (!gpe_event_info) { | |
357 | status = AE_BAD_PARAMETER; | |
358 | goto unlock_and_exit; | |
359 | } | |
360 | ||
361 | status = acpi_hw_clear_gpe(gpe_event_info); | |
362 | ||
363 | unlock_and_exit: | |
364 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
365 | return_ACPI_STATUS(status); | |
366 | } | |
367 | ||
368 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) | |
369 | ||
370 | /******************************************************************************* | |
371 | * | |
372 | * FUNCTION: acpi_get_gpe_status | |
373 | * | |
374 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
375 | * gpe_number - GPE level within the GPE block | |
376 | * event_status - Where the current status of the event will | |
377 | * be returned | |
378 | * | |
379 | * RETURN: Status | |
380 | * | |
da503373 | 381 | * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) |
3cfd53d5 LM |
382 | * |
383 | ******************************************************************************/ | |
384 | acpi_status | |
385 | acpi_get_gpe_status(acpi_handle gpe_device, | |
386 | u32 gpe_number, acpi_event_status *event_status) | |
387 | { | |
388 | acpi_status status = AE_OK; | |
389 | struct acpi_gpe_event_info *gpe_event_info; | |
390 | acpi_cpu_flags flags; | |
391 | ||
392 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); | |
393 | ||
394 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
395 | ||
396 | /* Ensure that we have a valid GPE number */ | |
397 | ||
398 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
399 | if (!gpe_event_info) { | |
400 | status = AE_BAD_PARAMETER; | |
401 | goto unlock_and_exit; | |
402 | } | |
403 | ||
404 | /* Obtain status on the requested GPE number */ | |
405 | ||
406 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); | |
407 | ||
408 | if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) | |
409 | *event_status |= ACPI_EVENT_FLAG_HANDLE; | |
410 | ||
411 | unlock_and_exit: | |
412 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
413 | return_ACPI_STATUS(status); | |
414 | } | |
415 | ||
416 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
417 | ||
418 | /****************************************************************************** | |
419 | * | |
420 | * FUNCTION: acpi_disable_all_gpes | |
421 | * | |
422 | * PARAMETERS: None | |
423 | * | |
424 | * RETURN: Status | |
425 | * | |
426 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks | |
427 | * | |
428 | ******************************************************************************/ | |
429 | ||
430 | acpi_status acpi_disable_all_gpes(void) | |
431 | { | |
432 | acpi_status status; | |
433 | ||
434 | ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); | |
435 | ||
436 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
437 | if (ACPI_FAILURE(status)) { | |
438 | return_ACPI_STATUS(status); | |
439 | } | |
440 | ||
441 | status = acpi_hw_disable_all_gpes(); | |
442 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
443 | ||
444 | return_ACPI_STATUS(status); | |
445 | } | |
446 | ||
3a37898d LM |
447 | ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes) |
448 | ||
3cfd53d5 LM |
449 | /****************************************************************************** |
450 | * | |
451 | * FUNCTION: acpi_enable_all_runtime_gpes | |
452 | * | |
453 | * PARAMETERS: None | |
454 | * | |
455 | * RETURN: Status | |
456 | * | |
457 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks | |
458 | * | |
459 | ******************************************************************************/ | |
460 | ||
461 | acpi_status acpi_enable_all_runtime_gpes(void) | |
462 | { | |
463 | acpi_status status; | |
464 | ||
465 | ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); | |
466 | ||
467 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
468 | if (ACPI_FAILURE(status)) { | |
469 | return_ACPI_STATUS(status); | |
470 | } | |
471 | ||
472 | status = acpi_hw_enable_all_runtime_gpes(); | |
473 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
474 | ||
475 | return_ACPI_STATUS(status); | |
476 | } | |
477 | ||
3a37898d LM |
478 | ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) |
479 | ||
3cfd53d5 LM |
480 | /******************************************************************************* |
481 | * | |
482 | * FUNCTION: acpi_install_gpe_block | |
483 | * | |
484 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
485 | * gpe_block_address - Address and space_iD | |
486 | * register_count - Number of GPE register pairs in the block | |
487 | * interrupt_number - H/W interrupt for the block | |
488 | * | |
489 | * RETURN: Status | |
490 | * | |
da503373 LM |
491 | * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not |
492 | * enabled here. | |
3cfd53d5 LM |
493 | * |
494 | ******************************************************************************/ | |
495 | acpi_status | |
496 | acpi_install_gpe_block(acpi_handle gpe_device, | |
497 | struct acpi_generic_address *gpe_block_address, | |
498 | u32 register_count, u32 interrupt_number) | |
499 | { | |
3a37898d | 500 | acpi_status status; |
3cfd53d5 LM |
501 | union acpi_operand_object *obj_desc; |
502 | struct acpi_namespace_node *node; | |
503 | struct acpi_gpe_block_info *gpe_block; | |
504 | ||
505 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); | |
506 | ||
507 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { | |
508 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
509 | } | |
510 | ||
511 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
512 | if (ACPI_FAILURE(status)) { | |
513 | return (status); | |
514 | } | |
515 | ||
516 | node = acpi_ns_validate_handle(gpe_device); | |
517 | if (!node) { | |
518 | status = AE_BAD_PARAMETER; | |
519 | goto unlock_and_exit; | |
520 | } | |
521 | ||
522 | /* | |
523 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
524 | * is always zero | |
525 | */ | |
526 | status = | |
527 | acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, | |
528 | interrupt_number, &gpe_block); | |
529 | if (ACPI_FAILURE(status)) { | |
530 | goto unlock_and_exit; | |
531 | } | |
532 | ||
533 | /* Install block in the device_object attached to the node */ | |
534 | ||
535 | obj_desc = acpi_ns_get_attached_object(node); | |
536 | if (!obj_desc) { | |
537 | ||
538 | /* | |
539 | * No object, create a new one (Device nodes do not always have | |
540 | * an attached object) | |
541 | */ | |
542 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); | |
543 | if (!obj_desc) { | |
544 | status = AE_NO_MEMORY; | |
545 | goto unlock_and_exit; | |
546 | } | |
547 | ||
548 | status = | |
549 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
550 | ||
551 | /* Remove local reference to the object */ | |
552 | ||
553 | acpi_ut_remove_reference(obj_desc); | |
554 | ||
555 | if (ACPI_FAILURE(status)) { | |
556 | goto unlock_and_exit; | |
557 | } | |
558 | } | |
559 | ||
560 | /* Now install the GPE block in the device_object */ | |
561 | ||
562 | obj_desc->device.gpe_block = gpe_block; | |
563 | ||
564 | unlock_and_exit: | |
565 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
566 | return_ACPI_STATUS(status); | |
567 | } | |
568 | ||
569 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) | |
570 | ||
571 | /******************************************************************************* | |
572 | * | |
573 | * FUNCTION: acpi_remove_gpe_block | |
574 | * | |
575 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
576 | * | |
577 | * RETURN: Status | |
578 | * | |
579 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
580 | * | |
581 | ******************************************************************************/ | |
582 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) | |
583 | { | |
584 | union acpi_operand_object *obj_desc; | |
585 | acpi_status status; | |
586 | struct acpi_namespace_node *node; | |
587 | ||
588 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); | |
589 | ||
590 | if (!gpe_device) { | |
591 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
592 | } | |
593 | ||
594 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
595 | if (ACPI_FAILURE(status)) { | |
596 | return (status); | |
597 | } | |
598 | ||
599 | node = acpi_ns_validate_handle(gpe_device); | |
600 | if (!node) { | |
601 | status = AE_BAD_PARAMETER; | |
602 | goto unlock_and_exit; | |
603 | } | |
604 | ||
605 | /* Get the device_object attached to the node */ | |
606 | ||
607 | obj_desc = acpi_ns_get_attached_object(node); | |
608 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
609 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
610 | } | |
611 | ||
612 | /* Delete the GPE block (but not the device_object) */ | |
613 | ||
614 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); | |
615 | if (ACPI_SUCCESS(status)) { | |
616 | obj_desc->device.gpe_block = NULL; | |
617 | } | |
618 | ||
619 | unlock_and_exit: | |
620 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
621 | return_ACPI_STATUS(status); | |
622 | } | |
623 | ||
624 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) | |
625 | ||
626 | /******************************************************************************* | |
627 | * | |
628 | * FUNCTION: acpi_get_gpe_device | |
629 | * | |
630 | * PARAMETERS: Index - System GPE index (0-current_gpe_count) | |
631 | * gpe_device - Where the parent GPE Device is returned | |
632 | * | |
633 | * RETURN: Status | |
634 | * | |
635 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL | |
636 | * gpe device indicates that the gpe number is contained in one of | |
637 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. | |
638 | * | |
639 | ******************************************************************************/ | |
640 | acpi_status | |
641 | acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) | |
642 | { | |
643 | struct acpi_gpe_device_info info; | |
644 | acpi_status status; | |
645 | ||
646 | ACPI_FUNCTION_TRACE(acpi_get_gpe_device); | |
647 | ||
648 | if (!gpe_device) { | |
649 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
650 | } | |
651 | ||
652 | if (index >= acpi_current_gpe_count) { | |
653 | return_ACPI_STATUS(AE_NOT_EXIST); | |
654 | } | |
655 | ||
656 | /* Setup and walk the GPE list */ | |
657 | ||
658 | info.index = index; | |
659 | info.status = AE_NOT_EXIST; | |
660 | info.gpe_device = NULL; | |
661 | info.next_block_base_index = 0; | |
662 | ||
663 | status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); | |
664 | if (ACPI_FAILURE(status)) { | |
665 | return_ACPI_STATUS(status); | |
666 | } | |
667 | ||
3a37898d | 668 | *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device); |
3cfd53d5 LM |
669 | return_ACPI_STATUS(info.status); |
670 | } | |
671 | ||
672 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) |