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3cfd53d5 LM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
fbb7a2dc | 8 | * Copyright (C) 2000 - 2014, 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 | ||
839e928f LZ |
44 | #define EXPORT_ACPI_INTERFACES |
45 | ||
3cfd53d5 LM |
46 | #include <acpi/acpi.h> |
47 | #include "accommon.h" | |
48 | #include "acevents.h" | |
49 | #include "acnamesp.h" | |
50 | ||
51 | #define _COMPONENT ACPI_EVENTS | |
52 | ACPI_MODULE_NAME("evxfgpe") | |
53 | ||
33620c54 | 54 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
75c8044f | 55 | /******************************************************************************* |
3cfd53d5 | 56 | * |
3a37898d | 57 | * FUNCTION: acpi_update_all_gpes |
3cfd53d5 LM |
58 | * |
59 | * PARAMETERS: None | |
60 | * | |
da503373 LM |
61 | * RETURN: Status |
62 | * | |
63 | * DESCRIPTION: Complete GPE initialization and enable all GPEs that have | |
64 | * associated _Lxx or _Exx methods and are not pointed to by any | |
65 | * device _PRW methods (this indicates that these GPEs are | |
66 | * generally intended for system or device wakeup. Such GPEs | |
67 | * have to be enabled directly when the devices whose _PRW | |
68 | * methods point to them are set up for wakeup signaling.) | |
3cfd53d5 | 69 | * |
da503373 LM |
70 | * NOTE: Should be called after any GPEs are added to the system. Primarily, |
71 | * after the system _PRW methods have been run, but also after a GPE Block | |
72 | * Device has been added or if any new GPE methods have been added via a | |
73 | * dynamic table load. | |
3cfd53d5 LM |
74 | * |
75 | ******************************************************************************/ | |
76 | ||
3a37898d | 77 | acpi_status acpi_update_all_gpes(void) |
3cfd53d5 LM |
78 | { |
79 | acpi_status status; | |
80 | ||
3a37898d | 81 | ACPI_FUNCTION_TRACE(acpi_update_all_gpes); |
3cfd53d5 LM |
82 | |
83 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
84 | if (ACPI_FAILURE(status)) { | |
85 | return_ACPI_STATUS(status); | |
3a37898d LM |
86 | } |
87 | ||
88 | if (acpi_gbl_all_gpes_initialized) { | |
89 | goto unlock_and_exit; | |
3cfd53d5 LM |
90 | } |
91 | ||
92 | status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL); | |
93 | if (ACPI_SUCCESS(status)) { | |
3a37898d | 94 | acpi_gbl_all_gpes_initialized = TRUE; |
3cfd53d5 LM |
95 | } |
96 | ||
3a37898d | 97 | unlock_and_exit: |
3cfd53d5 LM |
98 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
99 | ||
100 | return_ACPI_STATUS(status); | |
101 | } | |
102 | ||
3a37898d LM |
103 | ACPI_EXPORT_SYMBOL(acpi_update_all_gpes) |
104 | ||
3cfd53d5 LM |
105 | /******************************************************************************* |
106 | * | |
107 | * FUNCTION: acpi_enable_gpe | |
108 | * | |
109 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
110 | * gpe_number - GPE level within the GPE block | |
111 | * | |
112 | * RETURN: Status | |
113 | * | |
114 | * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is | |
115 | * hardware-enabled. | |
116 | * | |
117 | ******************************************************************************/ | |
118 | ||
119 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) | |
120 | { | |
121 | acpi_status status = AE_BAD_PARAMETER; | |
122 | struct acpi_gpe_event_info *gpe_event_info; | |
123 | acpi_cpu_flags flags; | |
124 | ||
125 | ACPI_FUNCTION_TRACE(acpi_enable_gpe); | |
126 | ||
127 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
128 | ||
b9ca3d7b RW |
129 | /* |
130 | * Ensure that we have a valid GPE number and that there is some way | |
131 | * of handling the GPE (handler or a GPE method). In other words, we | |
132 | * won't allow a valid GPE to be enabled if there is no way to handle it. | |
133 | */ | |
3cfd53d5 LM |
134 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
135 | if (gpe_event_info) { | |
b9ca3d7b RW |
136 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != |
137 | ACPI_GPE_DISPATCH_NONE) { | |
138 | status = acpi_ev_add_gpe_reference(gpe_event_info); | |
139 | } else { | |
140 | status = AE_NO_HANDLER; | |
141 | } | |
3cfd53d5 LM |
142 | } |
143 | ||
144 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
145 | return_ACPI_STATUS(status); | |
146 | } | |
147 | ACPI_EXPORT_SYMBOL(acpi_enable_gpe) | |
148 | ||
149 | /******************************************************************************* | |
150 | * | |
151 | * FUNCTION: acpi_disable_gpe | |
152 | * | |
153 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
154 | * gpe_number - GPE level within the GPE block | |
155 | * | |
156 | * RETURN: Status | |
157 | * | |
158 | * DESCRIPTION: Remove a reference to a GPE. When the last reference is | |
159 | * removed, only then is the GPE disabled (for runtime GPEs), or | |
160 | * the GPE mask bit disabled (for wake GPEs) | |
161 | * | |
162 | ******************************************************************************/ | |
163 | ||
164 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) | |
165 | { | |
166 | acpi_status status = AE_BAD_PARAMETER; | |
167 | struct acpi_gpe_event_info *gpe_event_info; | |
168 | acpi_cpu_flags flags; | |
169 | ||
170 | ACPI_FUNCTION_TRACE(acpi_disable_gpe); | |
171 | ||
172 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
173 | ||
174 | /* Ensure that we have a valid GPE number */ | |
175 | ||
176 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
177 | if (gpe_event_info) { | |
3a37898d | 178 | status = acpi_ev_remove_gpe_reference(gpe_event_info) ; |
3cfd53d5 LM |
179 | } |
180 | ||
181 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
182 | return_ACPI_STATUS(status); | |
183 | } | |
3e8214e5 | 184 | |
3cfd53d5 LM |
185 | ACPI_EXPORT_SYMBOL(acpi_disable_gpe) |
186 | ||
bba63a29 | 187 | |
c12f07d1 RW |
188 | /******************************************************************************* |
189 | * | |
190 | * FUNCTION: acpi_mark_gpe_for_wake | |
191 | * | |
192 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
193 | * gpe_number - GPE level within the GPE block | |
194 | * | |
195 | * RETURN: Status | |
196 | * | |
197 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply | |
198 | * sets the ACPI_GPE_CAN_WAKE flag. | |
199 | * | |
200 | * Some potential callers of acpi_setup_gpe_for_wake may know in advance that | |
201 | * there won't be any notify handlers installed for device wake notifications | |
202 | * from the given GPE (one example is a button GPE in Linux). For these cases, | |
203 | * acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake. | |
204 | * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to | |
205 | * setup implicit wake notification for it (since there's no handler method). | |
206 | * | |
207 | ******************************************************************************/ | |
208 | acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number) | |
209 | { | |
210 | struct acpi_gpe_event_info *gpe_event_info; | |
211 | acpi_status status = AE_BAD_PARAMETER; | |
212 | acpi_cpu_flags flags; | |
213 | ||
214 | ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake); | |
215 | ||
216 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
217 | ||
218 | /* Ensure that we have a valid GPE number */ | |
219 | ||
220 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
221 | if (gpe_event_info) { | |
222 | ||
223 | /* Mark the GPE as a possible wake event */ | |
224 | ||
225 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; | |
226 | status = AE_OK; | |
227 | } | |
228 | ||
229 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
230 | return_ACPI_STATUS(status); | |
231 | } | |
232 | ||
233 | ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake) | |
234 | ||
3cfd53d5 LM |
235 | /******************************************************************************* |
236 | * | |
3a37898d | 237 | * FUNCTION: acpi_setup_gpe_for_wake |
3cfd53d5 | 238 | * |
bba63a29 LM |
239 | * PARAMETERS: wake_device - Device associated with the GPE (via _PRW) |
240 | * gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
241 | * gpe_number - GPE level within the GPE block | |
3cfd53d5 LM |
242 | * |
243 | * RETURN: Status | |
244 | * | |
bba63a29 LM |
245 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. This |
246 | * interface is intended to be used as the host executes the | |
247 | * _PRW methods (Power Resources for Wake) in the system tables. | |
248 | * Each _PRW appears under a Device Object (The wake_device), and | |
249 | * contains the info for the wake GPE associated with the | |
250 | * wake_device. | |
3cfd53d5 LM |
251 | * |
252 | ******************************************************************************/ | |
bba63a29 LM |
253 | acpi_status |
254 | acpi_setup_gpe_for_wake(acpi_handle wake_device, | |
255 | acpi_handle gpe_device, u32 gpe_number) | |
3cfd53d5 | 256 | { |
5816b343 | 257 | acpi_status status; |
3cfd53d5 | 258 | struct acpi_gpe_event_info *gpe_event_info; |
bba63a29 | 259 | struct acpi_namespace_node *device_node; |
5816b343 BM |
260 | struct acpi_gpe_notify_info *notify; |
261 | struct acpi_gpe_notify_info *new_notify; | |
3cfd53d5 LM |
262 | acpi_cpu_flags flags; |
263 | ||
3a37898d | 264 | ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); |
3cfd53d5 | 265 | |
bba63a29 LM |
266 | /* Parameter Validation */ |
267 | ||
268 | if (!wake_device) { | |
269 | /* | |
270 | * By forcing wake_device to be valid, we automatically enable the | |
271 | * implicit notify feature on all hosts. | |
272 | */ | |
273 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
274 | } | |
275 | ||
5816b343 BM |
276 | /* Handle root object case */ |
277 | ||
278 | if (wake_device == ACPI_ROOT_OBJECT) { | |
279 | device_node = acpi_gbl_root_node; | |
280 | } else { | |
1f86e8c1 LZ |
281 | device_node = |
282 | ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); | |
5816b343 BM |
283 | } |
284 | ||
75c8044f | 285 | /* Validate wake_device is of type Device */ |
5816b343 BM |
286 | |
287 | if (device_node->type != ACPI_TYPE_DEVICE) { | |
288 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
289 | } | |
290 | ||
291 | /* | |
292 | * Allocate a new notify object up front, in case it is needed. | |
293 | * Memory allocation while holding a spinlock is a big no-no | |
294 | * on some hosts. | |
295 | */ | |
296 | new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info)); | |
297 | if (!new_notify) { | |
298 | return_ACPI_STATUS(AE_NO_MEMORY); | |
299 | } | |
300 | ||
3cfd53d5 LM |
301 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
302 | ||
303 | /* Ensure that we have a valid GPE number */ | |
304 | ||
305 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
2d559513 | 306 | if (!gpe_event_info) { |
5816b343 | 307 | status = AE_BAD_PARAMETER; |
2d559513 RW |
308 | goto unlock_and_exit; |
309 | } | |
bba63a29 | 310 | |
2d559513 RW |
311 | /* |
312 | * If there is no method or handler for this GPE, then the | |
5816b343 BM |
313 | * wake_device will be notified whenever this GPE fires. This is |
314 | * known as an "implicit notify". Note: The GPE is assumed to be | |
2d559513 RW |
315 | * level-triggered (for windows compatibility). |
316 | */ | |
5816b343 BM |
317 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
318 | ACPI_GPE_DISPATCH_NONE) { | |
319 | /* | |
320 | * This is the first device for implicit notify on this GPE. | |
321 | * Just set the flags here, and enter the NOTIFY block below. | |
322 | */ | |
323 | gpe_event_info->flags = | |
324 | (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); | |
981858bd RW |
325 | } |
326 | ||
5816b343 BM |
327 | /* |
328 | * If we already have an implicit notify on this GPE, add | |
329 | * this device to the notify list. | |
330 | */ | |
331 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == | |
332 | ACPI_GPE_DISPATCH_NOTIFY) { | |
333 | ||
334 | /* Ensure that the device is not already in the list */ | |
335 | ||
336 | notify = gpe_event_info->dispatch.notify_list; | |
337 | while (notify) { | |
338 | if (notify->device_node == device_node) { | |
339 | status = AE_ALREADY_EXISTS; | |
340 | goto unlock_and_exit; | |
341 | } | |
342 | notify = notify->next; | |
981858bd RW |
343 | } |
344 | ||
5816b343 BM |
345 | /* Add this device to the notify list for this GPE */ |
346 | ||
347 | new_notify->device_node = device_node; | |
348 | new_notify->next = gpe_event_info->dispatch.notify_list; | |
349 | gpe_event_info->dispatch.notify_list = new_notify; | |
350 | new_notify = NULL; | |
3cfd53d5 LM |
351 | } |
352 | ||
5816b343 BM |
353 | /* Mark the GPE as a possible wake event */ |
354 | ||
2d559513 RW |
355 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
356 | status = AE_OK; | |
357 | ||
5816b343 | 358 | unlock_and_exit: |
3cfd53d5 | 359 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
5816b343 BM |
360 | |
361 | /* Delete the notify object if it was not used above */ | |
362 | ||
363 | if (new_notify) { | |
364 | ACPI_FREE(new_notify); | |
365 | } | |
3cfd53d5 LM |
366 | return_ACPI_STATUS(status); |
367 | } | |
3a37898d | 368 | ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) |
3cfd53d5 LM |
369 | |
370 | /******************************************************************************* | |
371 | * | |
3a37898d | 372 | * FUNCTION: acpi_set_gpe_wake_mask |
3cfd53d5 LM |
373 | * |
374 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
375 | * gpe_number - GPE level within the GPE block | |
ba494bee | 376 | * action - Enable or Disable |
3cfd53d5 LM |
377 | * |
378 | * RETURN: Status | |
379 | * | |
da503373 LM |
380 | * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must |
381 | * already be marked as a WAKE GPE. | |
3cfd53d5 LM |
382 | * |
383 | ******************************************************************************/ | |
384 | ||
1f86e8c1 LZ |
385 | acpi_status |
386 | acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) | |
3cfd53d5 LM |
387 | { |
388 | acpi_status status = AE_OK; | |
389 | struct acpi_gpe_event_info *gpe_event_info; | |
390 | struct acpi_gpe_register_info *gpe_register_info; | |
391 | acpi_cpu_flags flags; | |
392 | u32 register_bit; | |
393 | ||
3a37898d | 394 | ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask); |
3cfd53d5 LM |
395 | |
396 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
397 | ||
da503373 LM |
398 | /* |
399 | * Ensure that we have a valid GPE number and that this GPE is in | |
400 | * fact a wake GPE | |
401 | */ | |
3cfd53d5 | 402 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
3a37898d | 403 | if (!gpe_event_info) { |
3cfd53d5 LM |
404 | status = AE_BAD_PARAMETER; |
405 | goto unlock_and_exit; | |
406 | } | |
407 | ||
3a37898d LM |
408 | if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { |
409 | status = AE_TYPE; | |
410 | goto unlock_and_exit; | |
411 | } | |
412 | ||
3cfd53d5 LM |
413 | gpe_register_info = gpe_event_info->register_info; |
414 | if (!gpe_register_info) { | |
415 | status = AE_NOT_EXIST; | |
416 | goto unlock_and_exit; | |
417 | } | |
418 | ||
1d94e1e8 | 419 | register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
3cfd53d5 LM |
420 | |
421 | /* Perform the action */ | |
422 | ||
423 | switch (action) { | |
424 | case ACPI_GPE_ENABLE: | |
1d1ea1b7 | 425 | |
3cfd53d5 LM |
426 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, |
427 | (u8)register_bit); | |
428 | break; | |
429 | ||
430 | case ACPI_GPE_DISABLE: | |
1d1ea1b7 | 431 | |
3cfd53d5 LM |
432 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
433 | (u8)register_bit); | |
434 | break; | |
435 | ||
436 | default: | |
1d1ea1b7 | 437 | |
3cfd53d5 LM |
438 | ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); |
439 | status = AE_BAD_PARAMETER; | |
440 | break; | |
441 | } | |
442 | ||
443 | unlock_and_exit: | |
444 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
445 | return_ACPI_STATUS(status); | |
446 | } | |
447 | ||
3a37898d | 448 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask) |
3cfd53d5 LM |
449 | |
450 | /******************************************************************************* | |
451 | * | |
452 | * FUNCTION: acpi_clear_gpe | |
453 | * | |
454 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
455 | * gpe_number - GPE level within the GPE block | |
456 | * | |
457 | * RETURN: Status | |
458 | * | |
459 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
460 | * | |
461 | ******************************************************************************/ | |
462 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) | |
463 | { | |
464 | acpi_status status = AE_OK; | |
465 | struct acpi_gpe_event_info *gpe_event_info; | |
466 | acpi_cpu_flags flags; | |
467 | ||
468 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); | |
469 | ||
470 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
471 | ||
472 | /* Ensure that we have a valid GPE number */ | |
473 | ||
474 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
475 | if (!gpe_event_info) { | |
476 | status = AE_BAD_PARAMETER; | |
477 | goto unlock_and_exit; | |
478 | } | |
479 | ||
480 | status = acpi_hw_clear_gpe(gpe_event_info); | |
481 | ||
482 | unlock_and_exit: | |
483 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
484 | return_ACPI_STATUS(status); | |
485 | } | |
486 | ||
487 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) | |
488 | ||
489 | /******************************************************************************* | |
490 | * | |
491 | * FUNCTION: acpi_get_gpe_status | |
492 | * | |
493 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
494 | * gpe_number - GPE level within the GPE block | |
75c8044f LZ |
495 | * event_status - Where the current status of the event |
496 | * will be returned | |
3cfd53d5 LM |
497 | * |
498 | * RETURN: Status | |
499 | * | |
da503373 | 500 | * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) |
3cfd53d5 LM |
501 | * |
502 | ******************************************************************************/ | |
503 | acpi_status | |
504 | acpi_get_gpe_status(acpi_handle gpe_device, | |
505 | u32 gpe_number, acpi_event_status *event_status) | |
506 | { | |
507 | acpi_status status = AE_OK; | |
508 | struct acpi_gpe_event_info *gpe_event_info; | |
509 | acpi_cpu_flags flags; | |
510 | ||
511 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); | |
512 | ||
513 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
514 | ||
515 | /* Ensure that we have a valid GPE number */ | |
516 | ||
517 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
518 | if (!gpe_event_info) { | |
519 | status = AE_BAD_PARAMETER; | |
520 | goto unlock_and_exit; | |
521 | } | |
522 | ||
523 | /* Obtain status on the requested GPE number */ | |
524 | ||
525 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); | |
526 | ||
527 | if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) | |
528 | *event_status |= ACPI_EVENT_FLAG_HANDLE; | |
529 | ||
10622bf8 | 530 | unlock_and_exit: |
3cfd53d5 LM |
531 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
532 | return_ACPI_STATUS(status); | |
533 | } | |
534 | ||
535 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
536 | ||
537 | /****************************************************************************** | |
538 | * | |
539 | * FUNCTION: acpi_disable_all_gpes | |
540 | * | |
541 | * PARAMETERS: None | |
542 | * | |
543 | * RETURN: Status | |
544 | * | |
545 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks | |
546 | * | |
547 | ******************************************************************************/ | |
548 | ||
549 | acpi_status acpi_disable_all_gpes(void) | |
550 | { | |
551 | acpi_status status; | |
552 | ||
553 | ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); | |
554 | ||
555 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
556 | if (ACPI_FAILURE(status)) { | |
557 | return_ACPI_STATUS(status); | |
558 | } | |
559 | ||
560 | status = acpi_hw_disable_all_gpes(); | |
561 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
562 | ||
563 | return_ACPI_STATUS(status); | |
564 | } | |
565 | ||
3a37898d LM |
566 | ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes) |
567 | ||
3cfd53d5 LM |
568 | /****************************************************************************** |
569 | * | |
570 | * FUNCTION: acpi_enable_all_runtime_gpes | |
571 | * | |
572 | * PARAMETERS: None | |
573 | * | |
574 | * RETURN: Status | |
575 | * | |
576 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks | |
577 | * | |
578 | ******************************************************************************/ | |
579 | ||
580 | acpi_status acpi_enable_all_runtime_gpes(void) | |
581 | { | |
582 | acpi_status status; | |
583 | ||
584 | ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); | |
585 | ||
586 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
587 | if (ACPI_FAILURE(status)) { | |
588 | return_ACPI_STATUS(status); | |
589 | } | |
590 | ||
591 | status = acpi_hw_enable_all_runtime_gpes(); | |
592 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
593 | ||
594 | return_ACPI_STATUS(status); | |
595 | } | |
596 | ||
3a37898d LM |
597 | ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) |
598 | ||
3cfd53d5 LM |
599 | /******************************************************************************* |
600 | * | |
601 | * FUNCTION: acpi_install_gpe_block | |
602 | * | |
603 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
ba494bee | 604 | * gpe_block_address - Address and space_ID |
3cfd53d5 LM |
605 | * register_count - Number of GPE register pairs in the block |
606 | * interrupt_number - H/W interrupt for the block | |
607 | * | |
608 | * RETURN: Status | |
609 | * | |
da503373 LM |
610 | * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not |
611 | * enabled here. | |
3cfd53d5 LM |
612 | * |
613 | ******************************************************************************/ | |
614 | acpi_status | |
615 | acpi_install_gpe_block(acpi_handle gpe_device, | |
616 | struct acpi_generic_address *gpe_block_address, | |
617 | u32 register_count, u32 interrupt_number) | |
618 | { | |
3a37898d | 619 | acpi_status status; |
3cfd53d5 LM |
620 | union acpi_operand_object *obj_desc; |
621 | struct acpi_namespace_node *node; | |
622 | struct acpi_gpe_block_info *gpe_block; | |
623 | ||
624 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); | |
625 | ||
626 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { | |
627 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
628 | } | |
629 | ||
630 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
631 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 632 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
633 | } |
634 | ||
635 | node = acpi_ns_validate_handle(gpe_device); | |
636 | if (!node) { | |
637 | status = AE_BAD_PARAMETER; | |
638 | goto unlock_and_exit; | |
639 | } | |
640 | ||
9186fb58 BM |
641 | /* Validate the parent device */ |
642 | ||
643 | if (node->type != ACPI_TYPE_DEVICE) { | |
644 | status = AE_TYPE; | |
645 | goto unlock_and_exit; | |
646 | } | |
647 | ||
648 | if (node->object) { | |
649 | status = AE_ALREADY_EXISTS; | |
650 | goto unlock_and_exit; | |
651 | } | |
652 | ||
3cfd53d5 LM |
653 | /* |
654 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
655 | * is always zero | |
656 | */ | |
7505da4c BM |
657 | status = acpi_ev_create_gpe_block(node, gpe_block_address->address, |
658 | gpe_block_address->space_id, | |
659 | register_count, 0, interrupt_number, | |
660 | &gpe_block); | |
3cfd53d5 LM |
661 | if (ACPI_FAILURE(status)) { |
662 | goto unlock_and_exit; | |
663 | } | |
664 | ||
665 | /* Install block in the device_object attached to the node */ | |
666 | ||
667 | obj_desc = acpi_ns_get_attached_object(node); | |
668 | if (!obj_desc) { | |
669 | ||
670 | /* | |
671 | * No object, create a new one (Device nodes do not always have | |
672 | * an attached object) | |
673 | */ | |
674 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); | |
675 | if (!obj_desc) { | |
676 | status = AE_NO_MEMORY; | |
677 | goto unlock_and_exit; | |
678 | } | |
679 | ||
680 | status = | |
681 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
682 | ||
683 | /* Remove local reference to the object */ | |
684 | ||
685 | acpi_ut_remove_reference(obj_desc); | |
686 | ||
687 | if (ACPI_FAILURE(status)) { | |
688 | goto unlock_and_exit; | |
689 | } | |
690 | } | |
691 | ||
692 | /* Now install the GPE block in the device_object */ | |
693 | ||
694 | obj_desc->device.gpe_block = gpe_block; | |
695 | ||
10622bf8 | 696 | unlock_and_exit: |
3cfd53d5 LM |
697 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
698 | return_ACPI_STATUS(status); | |
699 | } | |
700 | ||
701 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) | |
702 | ||
703 | /******************************************************************************* | |
704 | * | |
705 | * FUNCTION: acpi_remove_gpe_block | |
706 | * | |
707 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
708 | * | |
709 | * RETURN: Status | |
710 | * | |
711 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
712 | * | |
713 | ******************************************************************************/ | |
714 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) | |
715 | { | |
716 | union acpi_operand_object *obj_desc; | |
717 | acpi_status status; | |
718 | struct acpi_namespace_node *node; | |
719 | ||
720 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); | |
721 | ||
722 | if (!gpe_device) { | |
723 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
724 | } | |
725 | ||
726 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
727 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 728 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
729 | } |
730 | ||
731 | node = acpi_ns_validate_handle(gpe_device); | |
732 | if (!node) { | |
733 | status = AE_BAD_PARAMETER; | |
734 | goto unlock_and_exit; | |
735 | } | |
736 | ||
9186fb58 BM |
737 | /* Validate the parent device */ |
738 | ||
739 | if (node->type != ACPI_TYPE_DEVICE) { | |
740 | status = AE_TYPE; | |
741 | goto unlock_and_exit; | |
742 | } | |
743 | ||
3cfd53d5 LM |
744 | /* Get the device_object attached to the node */ |
745 | ||
746 | obj_desc = acpi_ns_get_attached_object(node); | |
747 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
748 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
749 | } | |
750 | ||
751 | /* Delete the GPE block (but not the device_object) */ | |
752 | ||
753 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); | |
754 | if (ACPI_SUCCESS(status)) { | |
755 | obj_desc->device.gpe_block = NULL; | |
756 | } | |
757 | ||
10622bf8 | 758 | unlock_and_exit: |
3cfd53d5 LM |
759 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
760 | return_ACPI_STATUS(status); | |
761 | } | |
762 | ||
763 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) | |
764 | ||
765 | /******************************************************************************* | |
766 | * | |
767 | * FUNCTION: acpi_get_gpe_device | |
768 | * | |
ba494bee | 769 | * PARAMETERS: index - System GPE index (0-current_gpe_count) |
3cfd53d5 LM |
770 | * gpe_device - Where the parent GPE Device is returned |
771 | * | |
772 | * RETURN: Status | |
773 | * | |
774 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL | |
775 | * gpe device indicates that the gpe number is contained in one of | |
776 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. | |
777 | * | |
778 | ******************************************************************************/ | |
1f86e8c1 | 779 | acpi_status acpi_get_gpe_device(u32 index, acpi_handle * gpe_device) |
3cfd53d5 LM |
780 | { |
781 | struct acpi_gpe_device_info info; | |
782 | acpi_status status; | |
783 | ||
784 | ACPI_FUNCTION_TRACE(acpi_get_gpe_device); | |
785 | ||
786 | if (!gpe_device) { | |
787 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
788 | } | |
789 | ||
790 | if (index >= acpi_current_gpe_count) { | |
791 | return_ACPI_STATUS(AE_NOT_EXIST); | |
792 | } | |
793 | ||
794 | /* Setup and walk the GPE list */ | |
795 | ||
796 | info.index = index; | |
797 | info.status = AE_NOT_EXIST; | |
798 | info.gpe_device = NULL; | |
799 | info.next_block_base_index = 0; | |
800 | ||
801 | status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); | |
802 | if (ACPI_FAILURE(status)) { | |
803 | return_ACPI_STATUS(status); | |
804 | } | |
805 | ||
3a37898d | 806 | *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device); |
3cfd53d5 LM |
807 | return_ACPI_STATUS(info.status); |
808 | } | |
809 | ||
810 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) | |
33620c54 | 811 | #endif /* !ACPI_REDUCED_HARDWARE */ |