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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; |
981858bd | 201 | struct acpi_gpe_notify_object *notify_object; |
3cfd53d5 | 202 | acpi_cpu_flags flags; |
981858bd | 203 | u8 gpe_dispatch_mask; |
3cfd53d5 | 204 | |
3a37898d | 205 | ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); |
3cfd53d5 | 206 | |
bba63a29 LM |
207 | /* Parameter Validation */ |
208 | ||
209 | if (!wake_device) { | |
210 | /* | |
211 | * By forcing wake_device to be valid, we automatically enable the | |
212 | * implicit notify feature on all hosts. | |
213 | */ | |
214 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
215 | } | |
216 | ||
3cfd53d5 LM |
217 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
218 | ||
219 | /* Ensure that we have a valid GPE number */ | |
220 | ||
221 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
2d559513 RW |
222 | if (!gpe_event_info) { |
223 | goto unlock_and_exit; | |
224 | } | |
bba63a29 | 225 | |
981858bd RW |
226 | if (wake_device == ACPI_ROOT_OBJECT) { |
227 | goto out; | |
228 | } | |
229 | ||
2d559513 RW |
230 | /* |
231 | * If there is no method or handler for this GPE, then the | |
232 | * wake_device will be notified whenever this GPE fires (aka | |
233 | * "implicit notify") Note: The GPE is assumed to be | |
234 | * level-triggered (for windows compatibility). | |
235 | */ | |
981858bd RW |
236 | gpe_dispatch_mask = gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK; |
237 | if (gpe_dispatch_mask != ACPI_GPE_DISPATCH_NONE | |
238 | && gpe_dispatch_mask != ACPI_GPE_DISPATCH_NOTIFY) { | |
239 | goto out; | |
240 | } | |
2d559513 | 241 | |
981858bd | 242 | /* Validate wake_device is of type Device */ |
2d559513 | 243 | |
981858bd RW |
244 | device_node = ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); |
245 | if (device_node->type != ACPI_TYPE_DEVICE) { | |
246 | goto unlock_and_exit; | |
247 | } | |
248 | ||
249 | if (gpe_dispatch_mask == ACPI_GPE_DISPATCH_NONE) { | |
2d559513 RW |
250 | gpe_event_info->flags = (ACPI_GPE_DISPATCH_NOTIFY | |
251 | ACPI_GPE_LEVEL_TRIGGERED); | |
981858bd RW |
252 | gpe_event_info->dispatch.device.node = device_node; |
253 | gpe_event_info->dispatch.device.next = NULL; | |
254 | } else { | |
255 | /* There are multiple devices to notify implicitly. */ | |
256 | ||
257 | notify_object = ACPI_ALLOCATE_ZEROED(sizeof(*notify_object)); | |
258 | if (!notify_object) { | |
259 | status = AE_NO_MEMORY; | |
260 | goto unlock_and_exit; | |
261 | } | |
262 | ||
263 | notify_object->node = device_node; | |
264 | notify_object->next = gpe_event_info->dispatch.device.next; | |
265 | gpe_event_info->dispatch.device.next = notify_object; | |
3cfd53d5 LM |
266 | } |
267 | ||
981858bd | 268 | out: |
2d559513 RW |
269 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
270 | status = AE_OK; | |
271 | ||
272 | unlock_and_exit: | |
3cfd53d5 LM |
273 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
274 | return_ACPI_STATUS(status); | |
275 | } | |
3a37898d | 276 | ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) |
3cfd53d5 LM |
277 | |
278 | /******************************************************************************* | |
279 | * | |
3a37898d | 280 | * FUNCTION: acpi_set_gpe_wake_mask |
3cfd53d5 LM |
281 | * |
282 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
283 | * gpe_number - GPE level within the GPE block | |
284 | * Action - Enable or Disable | |
285 | * | |
286 | * RETURN: Status | |
287 | * | |
da503373 LM |
288 | * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must |
289 | * already be marked as a WAKE GPE. | |
3cfd53d5 LM |
290 | * |
291 | ******************************************************************************/ | |
292 | ||
3a37898d | 293 | acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) |
3cfd53d5 LM |
294 | { |
295 | acpi_status status = AE_OK; | |
296 | struct acpi_gpe_event_info *gpe_event_info; | |
297 | struct acpi_gpe_register_info *gpe_register_info; | |
298 | acpi_cpu_flags flags; | |
299 | u32 register_bit; | |
300 | ||
3a37898d | 301 | ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask); |
3cfd53d5 LM |
302 | |
303 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
304 | ||
da503373 LM |
305 | /* |
306 | * Ensure that we have a valid GPE number and that this GPE is in | |
307 | * fact a wake GPE | |
308 | */ | |
3cfd53d5 | 309 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
3a37898d | 310 | if (!gpe_event_info) { |
3cfd53d5 LM |
311 | status = AE_BAD_PARAMETER; |
312 | goto unlock_and_exit; | |
313 | } | |
314 | ||
3a37898d LM |
315 | if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { |
316 | status = AE_TYPE; | |
317 | goto unlock_and_exit; | |
318 | } | |
319 | ||
3cfd53d5 LM |
320 | gpe_register_info = gpe_event_info->register_info; |
321 | if (!gpe_register_info) { | |
322 | status = AE_NOT_EXIST; | |
323 | goto unlock_and_exit; | |
324 | } | |
325 | ||
326 | register_bit = | |
327 | acpi_hw_get_gpe_register_bit(gpe_event_info, gpe_register_info); | |
328 | ||
329 | /* Perform the action */ | |
330 | ||
331 | switch (action) { | |
332 | case ACPI_GPE_ENABLE: | |
333 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, | |
334 | (u8)register_bit); | |
335 | break; | |
336 | ||
337 | case ACPI_GPE_DISABLE: | |
338 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, | |
339 | (u8)register_bit); | |
340 | break; | |
341 | ||
342 | default: | |
343 | ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); | |
344 | status = AE_BAD_PARAMETER; | |
345 | break; | |
346 | } | |
347 | ||
348 | unlock_and_exit: | |
349 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
350 | return_ACPI_STATUS(status); | |
351 | } | |
352 | ||
3a37898d | 353 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask) |
3cfd53d5 LM |
354 | |
355 | /******************************************************************************* | |
356 | * | |
357 | * FUNCTION: acpi_clear_gpe | |
358 | * | |
359 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
360 | * gpe_number - GPE level within the GPE block | |
361 | * | |
362 | * RETURN: Status | |
363 | * | |
364 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
365 | * | |
366 | ******************************************************************************/ | |
367 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) | |
368 | { | |
369 | acpi_status status = AE_OK; | |
370 | struct acpi_gpe_event_info *gpe_event_info; | |
371 | acpi_cpu_flags flags; | |
372 | ||
373 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); | |
374 | ||
375 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
376 | ||
377 | /* Ensure that we have a valid GPE number */ | |
378 | ||
379 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
380 | if (!gpe_event_info) { | |
381 | status = AE_BAD_PARAMETER; | |
382 | goto unlock_and_exit; | |
383 | } | |
384 | ||
385 | status = acpi_hw_clear_gpe(gpe_event_info); | |
386 | ||
387 | unlock_and_exit: | |
388 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
389 | return_ACPI_STATUS(status); | |
390 | } | |
391 | ||
392 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) | |
393 | ||
394 | /******************************************************************************* | |
395 | * | |
396 | * FUNCTION: acpi_get_gpe_status | |
397 | * | |
398 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
399 | * gpe_number - GPE level within the GPE block | |
400 | * event_status - Where the current status of the event will | |
401 | * be returned | |
402 | * | |
403 | * RETURN: Status | |
404 | * | |
da503373 | 405 | * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) |
3cfd53d5 LM |
406 | * |
407 | ******************************************************************************/ | |
408 | acpi_status | |
409 | acpi_get_gpe_status(acpi_handle gpe_device, | |
410 | u32 gpe_number, acpi_event_status *event_status) | |
411 | { | |
412 | acpi_status status = AE_OK; | |
413 | struct acpi_gpe_event_info *gpe_event_info; | |
414 | acpi_cpu_flags flags; | |
415 | ||
416 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); | |
417 | ||
418 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
419 | ||
420 | /* Ensure that we have a valid GPE number */ | |
421 | ||
422 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
423 | if (!gpe_event_info) { | |
424 | status = AE_BAD_PARAMETER; | |
425 | goto unlock_and_exit; | |
426 | } | |
427 | ||
428 | /* Obtain status on the requested GPE number */ | |
429 | ||
430 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); | |
431 | ||
432 | if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) | |
433 | *event_status |= ACPI_EVENT_FLAG_HANDLE; | |
434 | ||
435 | unlock_and_exit: | |
436 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
437 | return_ACPI_STATUS(status); | |
438 | } | |
439 | ||
440 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
441 | ||
442 | /****************************************************************************** | |
443 | * | |
444 | * FUNCTION: acpi_disable_all_gpes | |
445 | * | |
446 | * PARAMETERS: None | |
447 | * | |
448 | * RETURN: Status | |
449 | * | |
450 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks | |
451 | * | |
452 | ******************************************************************************/ | |
453 | ||
454 | acpi_status acpi_disable_all_gpes(void) | |
455 | { | |
456 | acpi_status status; | |
457 | ||
458 | ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); | |
459 | ||
460 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
461 | if (ACPI_FAILURE(status)) { | |
462 | return_ACPI_STATUS(status); | |
463 | } | |
464 | ||
465 | status = acpi_hw_disable_all_gpes(); | |
466 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
467 | ||
468 | return_ACPI_STATUS(status); | |
469 | } | |
470 | ||
3a37898d LM |
471 | ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes) |
472 | ||
3cfd53d5 LM |
473 | /****************************************************************************** |
474 | * | |
475 | * FUNCTION: acpi_enable_all_runtime_gpes | |
476 | * | |
477 | * PARAMETERS: None | |
478 | * | |
479 | * RETURN: Status | |
480 | * | |
481 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks | |
482 | * | |
483 | ******************************************************************************/ | |
484 | ||
485 | acpi_status acpi_enable_all_runtime_gpes(void) | |
486 | { | |
487 | acpi_status status; | |
488 | ||
489 | ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); | |
490 | ||
491 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
492 | if (ACPI_FAILURE(status)) { | |
493 | return_ACPI_STATUS(status); | |
494 | } | |
495 | ||
496 | status = acpi_hw_enable_all_runtime_gpes(); | |
497 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
498 | ||
499 | return_ACPI_STATUS(status); | |
500 | } | |
501 | ||
3a37898d LM |
502 | ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) |
503 | ||
3cfd53d5 LM |
504 | /******************************************************************************* |
505 | * | |
506 | * FUNCTION: acpi_install_gpe_block | |
507 | * | |
508 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
509 | * gpe_block_address - Address and space_iD | |
510 | * register_count - Number of GPE register pairs in the block | |
511 | * interrupt_number - H/W interrupt for the block | |
512 | * | |
513 | * RETURN: Status | |
514 | * | |
da503373 LM |
515 | * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not |
516 | * enabled here. | |
3cfd53d5 LM |
517 | * |
518 | ******************************************************************************/ | |
519 | acpi_status | |
520 | acpi_install_gpe_block(acpi_handle gpe_device, | |
521 | struct acpi_generic_address *gpe_block_address, | |
522 | u32 register_count, u32 interrupt_number) | |
523 | { | |
3a37898d | 524 | acpi_status status; |
3cfd53d5 LM |
525 | union acpi_operand_object *obj_desc; |
526 | struct acpi_namespace_node *node; | |
527 | struct acpi_gpe_block_info *gpe_block; | |
528 | ||
529 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); | |
530 | ||
531 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { | |
532 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
533 | } | |
534 | ||
535 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
536 | if (ACPI_FAILURE(status)) { | |
537 | return (status); | |
538 | } | |
539 | ||
540 | node = acpi_ns_validate_handle(gpe_device); | |
541 | if (!node) { | |
542 | status = AE_BAD_PARAMETER; | |
543 | goto unlock_and_exit; | |
544 | } | |
545 | ||
546 | /* | |
547 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
548 | * is always zero | |
549 | */ | |
550 | status = | |
551 | acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, | |
552 | interrupt_number, &gpe_block); | |
553 | if (ACPI_FAILURE(status)) { | |
554 | goto unlock_and_exit; | |
555 | } | |
556 | ||
557 | /* Install block in the device_object attached to the node */ | |
558 | ||
559 | obj_desc = acpi_ns_get_attached_object(node); | |
560 | if (!obj_desc) { | |
561 | ||
562 | /* | |
563 | * No object, create a new one (Device nodes do not always have | |
564 | * an attached object) | |
565 | */ | |
566 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); | |
567 | if (!obj_desc) { | |
568 | status = AE_NO_MEMORY; | |
569 | goto unlock_and_exit; | |
570 | } | |
571 | ||
572 | status = | |
573 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
574 | ||
575 | /* Remove local reference to the object */ | |
576 | ||
577 | acpi_ut_remove_reference(obj_desc); | |
578 | ||
579 | if (ACPI_FAILURE(status)) { | |
580 | goto unlock_and_exit; | |
581 | } | |
582 | } | |
583 | ||
584 | /* Now install the GPE block in the device_object */ | |
585 | ||
586 | obj_desc->device.gpe_block = gpe_block; | |
587 | ||
588 | unlock_and_exit: | |
589 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
590 | return_ACPI_STATUS(status); | |
591 | } | |
592 | ||
593 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) | |
594 | ||
595 | /******************************************************************************* | |
596 | * | |
597 | * FUNCTION: acpi_remove_gpe_block | |
598 | * | |
599 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
600 | * | |
601 | * RETURN: Status | |
602 | * | |
603 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
604 | * | |
605 | ******************************************************************************/ | |
606 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) | |
607 | { | |
608 | union acpi_operand_object *obj_desc; | |
609 | acpi_status status; | |
610 | struct acpi_namespace_node *node; | |
611 | ||
612 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); | |
613 | ||
614 | if (!gpe_device) { | |
615 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
616 | } | |
617 | ||
618 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
619 | if (ACPI_FAILURE(status)) { | |
620 | return (status); | |
621 | } | |
622 | ||
623 | node = acpi_ns_validate_handle(gpe_device); | |
624 | if (!node) { | |
625 | status = AE_BAD_PARAMETER; | |
626 | goto unlock_and_exit; | |
627 | } | |
628 | ||
629 | /* Get the device_object attached to the node */ | |
630 | ||
631 | obj_desc = acpi_ns_get_attached_object(node); | |
632 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
633 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
634 | } | |
635 | ||
636 | /* Delete the GPE block (but not the device_object) */ | |
637 | ||
638 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); | |
639 | if (ACPI_SUCCESS(status)) { | |
640 | obj_desc->device.gpe_block = NULL; | |
641 | } | |
642 | ||
643 | unlock_and_exit: | |
644 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
645 | return_ACPI_STATUS(status); | |
646 | } | |
647 | ||
648 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) | |
649 | ||
650 | /******************************************************************************* | |
651 | * | |
652 | * FUNCTION: acpi_get_gpe_device | |
653 | * | |
654 | * PARAMETERS: Index - System GPE index (0-current_gpe_count) | |
655 | * gpe_device - Where the parent GPE Device is returned | |
656 | * | |
657 | * RETURN: Status | |
658 | * | |
659 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL | |
660 | * gpe device indicates that the gpe number is contained in one of | |
661 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. | |
662 | * | |
663 | ******************************************************************************/ | |
664 | acpi_status | |
665 | acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) | |
666 | { | |
667 | struct acpi_gpe_device_info info; | |
668 | acpi_status status; | |
669 | ||
670 | ACPI_FUNCTION_TRACE(acpi_get_gpe_device); | |
671 | ||
672 | if (!gpe_device) { | |
673 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
674 | } | |
675 | ||
676 | if (index >= acpi_current_gpe_count) { | |
677 | return_ACPI_STATUS(AE_NOT_EXIST); | |
678 | } | |
679 | ||
680 | /* Setup and walk the GPE list */ | |
681 | ||
682 | info.index = index; | |
683 | info.status = AE_NOT_EXIST; | |
684 | info.gpe_device = NULL; | |
685 | info.next_block_base_index = 0; | |
686 | ||
687 | status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); | |
688 | if (ACPI_FAILURE(status)) { | |
689 | return_ACPI_STATUS(status); | |
690 | } | |
691 | ||
3a37898d | 692 | *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device); |
3cfd53d5 LM |
693 | return_ACPI_STATUS(info.status); |
694 | } | |
695 | ||
696 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) |