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3cfd53d5 LM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
82a80941 | 8 | * Copyright (C) 2000 - 2015, 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 | * | |
f19f1a7e LZ |
109 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
110 | * gpe_number - GPE level within the GPE block | |
3cfd53d5 LM |
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 | ******************************************************************************/ | |
3cfd53d5 LM |
118 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) |
119 | { | |
120 | acpi_status status = AE_BAD_PARAMETER; | |
121 | struct acpi_gpe_event_info *gpe_event_info; | |
122 | acpi_cpu_flags flags; | |
123 | ||
124 | ACPI_FUNCTION_TRACE(acpi_enable_gpe); | |
125 | ||
126 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
127 | ||
b9ca3d7b RW |
128 | /* |
129 | * Ensure that we have a valid GPE number and that there is some way | |
130 | * of handling the GPE (handler or a GPE method). In other words, we | |
131 | * won't allow a valid GPE to be enabled if there is no way to handle it. | |
132 | */ | |
3cfd53d5 LM |
133 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
134 | if (gpe_event_info) { | |
7c43312a | 135 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != |
b9ca3d7b RW |
136 | ACPI_GPE_DISPATCH_NONE) { |
137 | status = acpi_ev_add_gpe_reference(gpe_event_info); | |
138 | } else { | |
139 | status = AE_NO_HANDLER; | |
140 | } | |
3cfd53d5 LM |
141 | } |
142 | ||
143 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
144 | return_ACPI_STATUS(status); | |
145 | } | |
146 | ACPI_EXPORT_SYMBOL(acpi_enable_gpe) | |
147 | ||
148 | /******************************************************************************* | |
149 | * | |
150 | * FUNCTION: acpi_disable_gpe | |
151 | * | |
152 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
153 | * gpe_number - GPE level within the GPE block | |
154 | * | |
155 | * RETURN: Status | |
156 | * | |
157 | * DESCRIPTION: Remove a reference to a GPE. When the last reference is | |
158 | * removed, only then is the GPE disabled (for runtime GPEs), or | |
159 | * the GPE mask bit disabled (for wake GPEs) | |
160 | * | |
161 | ******************************************************************************/ | |
162 | ||
163 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) | |
164 | { | |
165 | acpi_status status = AE_BAD_PARAMETER; | |
166 | struct acpi_gpe_event_info *gpe_event_info; | |
167 | acpi_cpu_flags flags; | |
168 | ||
169 | ACPI_FUNCTION_TRACE(acpi_disable_gpe); | |
170 | ||
171 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
172 | ||
173 | /* Ensure that we have a valid GPE number */ | |
174 | ||
175 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
176 | if (gpe_event_info) { | |
3a37898d | 177 | status = acpi_ev_remove_gpe_reference(gpe_event_info) ; |
3cfd53d5 LM |
178 | } |
179 | ||
180 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
181 | return_ACPI_STATUS(status); | |
182 | } | |
3e8214e5 | 183 | |
3cfd53d5 LM |
184 | ACPI_EXPORT_SYMBOL(acpi_disable_gpe) |
185 | ||
eb3d80f7 LZ |
186 | /******************************************************************************* |
187 | * | |
188 | * FUNCTION: acpi_set_gpe | |
189 | * | |
190 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
191 | * gpe_number - GPE level within the GPE block | |
192 | * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE | |
193 | * | |
194 | * RETURN: Status | |
195 | * | |
196 | * DESCRIPTION: Enable or disable an individual GPE. This function bypasses | |
197 | * the reference count mechanism used in the acpi_enable_gpe and | |
198 | * acpi_disable_gpe interfaces -- and should be used with care. | |
199 | * | |
200 | * Note: Typically used to disable a runtime GPE for short period of time, | |
201 | * then re-enable it, without disturbing the existing reference counts. This | |
202 | * is useful, for example, in the Embedded Controller (EC) driver. | |
203 | * | |
204 | ******************************************************************************/ | |
205 | acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action) | |
206 | { | |
207 | struct acpi_gpe_event_info *gpe_event_info; | |
208 | acpi_status status; | |
209 | acpi_cpu_flags flags; | |
210 | ||
211 | ACPI_FUNCTION_TRACE(acpi_set_gpe); | |
212 | ||
213 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
214 | ||
215 | /* Ensure that we have a valid GPE number */ | |
216 | ||
217 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
218 | if (!gpe_event_info) { | |
219 | status = AE_BAD_PARAMETER; | |
220 | goto unlock_and_exit; | |
221 | } | |
222 | ||
223 | /* Perform the action */ | |
224 | ||
225 | switch (action) { | |
226 | case ACPI_GPE_ENABLE: | |
227 | ||
228 | status = acpi_ev_enable_gpe(gpe_event_info); | |
229 | break; | |
230 | ||
231 | case ACPI_GPE_DISABLE: | |
232 | ||
233 | status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); | |
234 | break; | |
235 | ||
236 | default: | |
237 | ||
238 | status = AE_BAD_PARAMETER; | |
239 | break; | |
240 | } | |
241 | ||
242 | unlock_and_exit: | |
243 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
244 | return_ACPI_STATUS(status); | |
245 | } | |
246 | ||
247 | ACPI_EXPORT_SYMBOL(acpi_set_gpe) | |
bba63a29 | 248 | |
c12f07d1 RW |
249 | /******************************************************************************* |
250 | * | |
251 | * FUNCTION: acpi_mark_gpe_for_wake | |
252 | * | |
253 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
254 | * gpe_number - GPE level within the GPE block | |
255 | * | |
256 | * RETURN: Status | |
257 | * | |
258 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply | |
259 | * sets the ACPI_GPE_CAN_WAKE flag. | |
260 | * | |
261 | * Some potential callers of acpi_setup_gpe_for_wake may know in advance that | |
262 | * there won't be any notify handlers installed for device wake notifications | |
263 | * from the given GPE (one example is a button GPE in Linux). For these cases, | |
264 | * acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake. | |
265 | * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to | |
266 | * setup implicit wake notification for it (since there's no handler method). | |
267 | * | |
268 | ******************************************************************************/ | |
269 | acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number) | |
270 | { | |
271 | struct acpi_gpe_event_info *gpe_event_info; | |
272 | acpi_status status = AE_BAD_PARAMETER; | |
273 | acpi_cpu_flags flags; | |
274 | ||
275 | ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake); | |
276 | ||
277 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
278 | ||
279 | /* Ensure that we have a valid GPE number */ | |
280 | ||
281 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
282 | if (gpe_event_info) { | |
283 | ||
284 | /* Mark the GPE as a possible wake event */ | |
285 | ||
286 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; | |
287 | status = AE_OK; | |
288 | } | |
289 | ||
290 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
291 | return_ACPI_STATUS(status); | |
292 | } | |
293 | ||
294 | ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake) | |
295 | ||
3cfd53d5 LM |
296 | /******************************************************************************* |
297 | * | |
3a37898d | 298 | * FUNCTION: acpi_setup_gpe_for_wake |
3cfd53d5 | 299 | * |
bba63a29 LM |
300 | * PARAMETERS: wake_device - Device associated with the GPE (via _PRW) |
301 | * gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
302 | * gpe_number - GPE level within the GPE block | |
3cfd53d5 LM |
303 | * |
304 | * RETURN: Status | |
305 | * | |
bba63a29 LM |
306 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. This |
307 | * interface is intended to be used as the host executes the | |
308 | * _PRW methods (Power Resources for Wake) in the system tables. | |
309 | * Each _PRW appears under a Device Object (The wake_device), and | |
310 | * contains the info for the wake GPE associated with the | |
311 | * wake_device. | |
3cfd53d5 LM |
312 | * |
313 | ******************************************************************************/ | |
bba63a29 LM |
314 | acpi_status |
315 | acpi_setup_gpe_for_wake(acpi_handle wake_device, | |
316 | acpi_handle gpe_device, u32 gpe_number) | |
3cfd53d5 | 317 | { |
5816b343 | 318 | acpi_status status; |
3cfd53d5 | 319 | struct acpi_gpe_event_info *gpe_event_info; |
bba63a29 | 320 | struct acpi_namespace_node *device_node; |
5816b343 BM |
321 | struct acpi_gpe_notify_info *notify; |
322 | struct acpi_gpe_notify_info *new_notify; | |
3cfd53d5 LM |
323 | acpi_cpu_flags flags; |
324 | ||
3a37898d | 325 | ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); |
3cfd53d5 | 326 | |
bba63a29 LM |
327 | /* Parameter Validation */ |
328 | ||
329 | if (!wake_device) { | |
330 | /* | |
331 | * By forcing wake_device to be valid, we automatically enable the | |
332 | * implicit notify feature on all hosts. | |
333 | */ | |
334 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
335 | } | |
336 | ||
5816b343 BM |
337 | /* Handle root object case */ |
338 | ||
339 | if (wake_device == ACPI_ROOT_OBJECT) { | |
340 | device_node = acpi_gbl_root_node; | |
341 | } else { | |
1f86e8c1 LZ |
342 | device_node = |
343 | ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); | |
5816b343 BM |
344 | } |
345 | ||
75c8044f | 346 | /* Validate wake_device is of type Device */ |
5816b343 BM |
347 | |
348 | if (device_node->type != ACPI_TYPE_DEVICE) { | |
349 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
350 | } | |
351 | ||
352 | /* | |
353 | * Allocate a new notify object up front, in case it is needed. | |
354 | * Memory allocation while holding a spinlock is a big no-no | |
355 | * on some hosts. | |
356 | */ | |
357 | new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info)); | |
358 | if (!new_notify) { | |
359 | return_ACPI_STATUS(AE_NO_MEMORY); | |
360 | } | |
361 | ||
3cfd53d5 LM |
362 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
363 | ||
364 | /* Ensure that we have a valid GPE number */ | |
365 | ||
366 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
2d559513 | 367 | if (!gpe_event_info) { |
5816b343 | 368 | status = AE_BAD_PARAMETER; |
2d559513 RW |
369 | goto unlock_and_exit; |
370 | } | |
bba63a29 | 371 | |
2d559513 RW |
372 | /* |
373 | * If there is no method or handler for this GPE, then the | |
5816b343 BM |
374 | * wake_device will be notified whenever this GPE fires. This is |
375 | * known as an "implicit notify". Note: The GPE is assumed to be | |
2d559513 RW |
376 | * level-triggered (for windows compatibility). |
377 | */ | |
7c43312a | 378 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
5816b343 BM |
379 | ACPI_GPE_DISPATCH_NONE) { |
380 | /* | |
381 | * This is the first device for implicit notify on this GPE. | |
382 | * Just set the flags here, and enter the NOTIFY block below. | |
383 | */ | |
384 | gpe_event_info->flags = | |
385 | (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); | |
981858bd RW |
386 | } |
387 | ||
5816b343 BM |
388 | /* |
389 | * If we already have an implicit notify on this GPE, add | |
390 | * this device to the notify list. | |
391 | */ | |
7c43312a | 392 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
5816b343 BM |
393 | ACPI_GPE_DISPATCH_NOTIFY) { |
394 | ||
395 | /* Ensure that the device is not already in the list */ | |
396 | ||
397 | notify = gpe_event_info->dispatch.notify_list; | |
398 | while (notify) { | |
399 | if (notify->device_node == device_node) { | |
400 | status = AE_ALREADY_EXISTS; | |
401 | goto unlock_and_exit; | |
402 | } | |
403 | notify = notify->next; | |
981858bd RW |
404 | } |
405 | ||
5816b343 BM |
406 | /* Add this device to the notify list for this GPE */ |
407 | ||
408 | new_notify->device_node = device_node; | |
409 | new_notify->next = gpe_event_info->dispatch.notify_list; | |
410 | gpe_event_info->dispatch.notify_list = new_notify; | |
411 | new_notify = NULL; | |
3cfd53d5 LM |
412 | } |
413 | ||
5816b343 BM |
414 | /* Mark the GPE as a possible wake event */ |
415 | ||
2d559513 RW |
416 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
417 | status = AE_OK; | |
418 | ||
5816b343 | 419 | unlock_and_exit: |
3cfd53d5 | 420 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
5816b343 BM |
421 | |
422 | /* Delete the notify object if it was not used above */ | |
423 | ||
424 | if (new_notify) { | |
425 | ACPI_FREE(new_notify); | |
426 | } | |
3cfd53d5 LM |
427 | return_ACPI_STATUS(status); |
428 | } | |
3a37898d | 429 | ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) |
3cfd53d5 LM |
430 | |
431 | /******************************************************************************* | |
432 | * | |
3a37898d | 433 | * FUNCTION: acpi_set_gpe_wake_mask |
3cfd53d5 LM |
434 | * |
435 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
436 | * gpe_number - GPE level within the GPE block | |
ba494bee | 437 | * action - Enable or Disable |
3cfd53d5 LM |
438 | * |
439 | * RETURN: Status | |
440 | * | |
da503373 LM |
441 | * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must |
442 | * already be marked as a WAKE GPE. | |
3cfd53d5 LM |
443 | * |
444 | ******************************************************************************/ | |
445 | ||
1f86e8c1 LZ |
446 | acpi_status |
447 | acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) | |
3cfd53d5 LM |
448 | { |
449 | acpi_status status = AE_OK; | |
450 | struct acpi_gpe_event_info *gpe_event_info; | |
451 | struct acpi_gpe_register_info *gpe_register_info; | |
452 | acpi_cpu_flags flags; | |
453 | u32 register_bit; | |
454 | ||
3a37898d | 455 | ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask); |
3cfd53d5 LM |
456 | |
457 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
458 | ||
da503373 LM |
459 | /* |
460 | * Ensure that we have a valid GPE number and that this GPE is in | |
461 | * fact a wake GPE | |
462 | */ | |
3cfd53d5 | 463 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
3a37898d | 464 | if (!gpe_event_info) { |
3cfd53d5 LM |
465 | status = AE_BAD_PARAMETER; |
466 | goto unlock_and_exit; | |
467 | } | |
468 | ||
3a37898d LM |
469 | if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { |
470 | status = AE_TYPE; | |
471 | goto unlock_and_exit; | |
472 | } | |
473 | ||
3cfd53d5 LM |
474 | gpe_register_info = gpe_event_info->register_info; |
475 | if (!gpe_register_info) { | |
476 | status = AE_NOT_EXIST; | |
477 | goto unlock_and_exit; | |
478 | } | |
479 | ||
1d94e1e8 | 480 | register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
3cfd53d5 LM |
481 | |
482 | /* Perform the action */ | |
483 | ||
484 | switch (action) { | |
485 | case ACPI_GPE_ENABLE: | |
1d1ea1b7 | 486 | |
3cfd53d5 LM |
487 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, |
488 | (u8)register_bit); | |
489 | break; | |
490 | ||
491 | case ACPI_GPE_DISABLE: | |
1d1ea1b7 | 492 | |
3cfd53d5 LM |
493 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
494 | (u8)register_bit); | |
495 | break; | |
496 | ||
497 | default: | |
1d1ea1b7 | 498 | |
3cfd53d5 LM |
499 | ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); |
500 | status = AE_BAD_PARAMETER; | |
501 | break; | |
502 | } | |
503 | ||
504 | unlock_and_exit: | |
505 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
506 | return_ACPI_STATUS(status); | |
507 | } | |
508 | ||
3a37898d | 509 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask) |
3cfd53d5 LM |
510 | |
511 | /******************************************************************************* | |
512 | * | |
513 | * FUNCTION: acpi_clear_gpe | |
514 | * | |
515 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
516 | * gpe_number - GPE level within the GPE block | |
517 | * | |
518 | * RETURN: Status | |
519 | * | |
520 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
521 | * | |
522 | ******************************************************************************/ | |
523 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) | |
524 | { | |
525 | acpi_status status = AE_OK; | |
526 | struct acpi_gpe_event_info *gpe_event_info; | |
527 | acpi_cpu_flags flags; | |
528 | ||
529 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); | |
530 | ||
531 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
532 | ||
533 | /* Ensure that we have a valid GPE number */ | |
534 | ||
535 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
536 | if (!gpe_event_info) { | |
537 | status = AE_BAD_PARAMETER; | |
538 | goto unlock_and_exit; | |
539 | } | |
540 | ||
541 | status = acpi_hw_clear_gpe(gpe_event_info); | |
542 | ||
543 | unlock_and_exit: | |
544 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
545 | return_ACPI_STATUS(status); | |
546 | } | |
547 | ||
548 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) | |
549 | ||
550 | /******************************************************************************* | |
551 | * | |
552 | * FUNCTION: acpi_get_gpe_status | |
553 | * | |
f19f1a7e LZ |
554 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
555 | * gpe_number - GPE level within the GPE block | |
75c8044f LZ |
556 | * event_status - Where the current status of the event |
557 | * will be returned | |
3cfd53d5 LM |
558 | * |
559 | * RETURN: Status | |
560 | * | |
da503373 | 561 | * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) |
3cfd53d5 LM |
562 | * |
563 | ******************************************************************************/ | |
564 | acpi_status | |
565 | acpi_get_gpe_status(acpi_handle gpe_device, | |
566 | u32 gpe_number, acpi_event_status *event_status) | |
567 | { | |
568 | acpi_status status = AE_OK; | |
569 | struct acpi_gpe_event_info *gpe_event_info; | |
570 | acpi_cpu_flags flags; | |
571 | ||
572 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); | |
573 | ||
574 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
575 | ||
576 | /* Ensure that we have a valid GPE number */ | |
577 | ||
578 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
579 | if (!gpe_event_info) { | |
580 | status = AE_BAD_PARAMETER; | |
581 | goto unlock_and_exit; | |
582 | } | |
583 | ||
584 | /* Obtain status on the requested GPE number */ | |
585 | ||
586 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); | |
587 | ||
10622bf8 | 588 | unlock_and_exit: |
3cfd53d5 LM |
589 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
590 | return_ACPI_STATUS(status); | |
591 | } | |
592 | ||
593 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
594 | ||
eb3d80f7 LZ |
595 | /******************************************************************************* |
596 | * | |
597 | * FUNCTION: acpi_finish_gpe | |
598 | * | |
599 | * PARAMETERS: gpe_device - Namespace node for the GPE Block | |
600 | * (NULL for FADT defined GPEs) | |
601 | * gpe_number - GPE level within the GPE block | |
602 | * | |
603 | * RETURN: Status | |
604 | * | |
605 | * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE | |
606 | * processing. Intended for use by asynchronous host-installed | |
607 | * GPE handlers. The GPE is only reenabled if the enable_for_run bit | |
608 | * is set in the GPE info. | |
609 | * | |
610 | ******************************************************************************/ | |
611 | acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number) | |
612 | { | |
613 | struct acpi_gpe_event_info *gpe_event_info; | |
614 | acpi_status status; | |
615 | acpi_cpu_flags flags; | |
616 | ||
617 | ACPI_FUNCTION_TRACE(acpi_finish_gpe); | |
618 | ||
619 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
620 | ||
621 | /* Ensure that we have a valid GPE number */ | |
622 | ||
623 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
624 | if (!gpe_event_info) { | |
625 | status = AE_BAD_PARAMETER; | |
626 | goto unlock_and_exit; | |
627 | } | |
628 | ||
629 | status = acpi_ev_finish_gpe(gpe_event_info); | |
630 | ||
631 | unlock_and_exit: | |
632 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
633 | return_ACPI_STATUS(status); | |
634 | } | |
635 | ||
636 | ACPI_EXPORT_SYMBOL(acpi_finish_gpe) | |
637 | ||
3cfd53d5 LM |
638 | /****************************************************************************** |
639 | * | |
640 | * FUNCTION: acpi_disable_all_gpes | |
641 | * | |
642 | * PARAMETERS: None | |
643 | * | |
644 | * RETURN: Status | |
645 | * | |
646 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks | |
647 | * | |
648 | ******************************************************************************/ | |
649 | ||
650 | acpi_status acpi_disable_all_gpes(void) | |
651 | { | |
652 | acpi_status status; | |
653 | ||
654 | ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); | |
655 | ||
656 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
657 | if (ACPI_FAILURE(status)) { | |
658 | return_ACPI_STATUS(status); | |
659 | } | |
660 | ||
661 | status = acpi_hw_disable_all_gpes(); | |
662 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
663 | ||
664 | return_ACPI_STATUS(status); | |
665 | } | |
666 | ||
3a37898d LM |
667 | ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes) |
668 | ||
3cfd53d5 LM |
669 | /****************************************************************************** |
670 | * | |
671 | * FUNCTION: acpi_enable_all_runtime_gpes | |
672 | * | |
673 | * PARAMETERS: None | |
674 | * | |
675 | * RETURN: Status | |
676 | * | |
677 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks | |
678 | * | |
679 | ******************************************************************************/ | |
680 | ||
681 | acpi_status acpi_enable_all_runtime_gpes(void) | |
682 | { | |
683 | acpi_status status; | |
684 | ||
685 | ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); | |
686 | ||
687 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
688 | if (ACPI_FAILURE(status)) { | |
689 | return_ACPI_STATUS(status); | |
690 | } | |
691 | ||
692 | status = acpi_hw_enable_all_runtime_gpes(); | |
693 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
694 | ||
695 | return_ACPI_STATUS(status); | |
696 | } | |
697 | ||
3a37898d LM |
698 | ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) |
699 | ||
e0fa975d RW |
700 | /****************************************************************************** |
701 | * | |
702 | * FUNCTION: acpi_enable_all_wakeup_gpes | |
703 | * | |
704 | * PARAMETERS: None | |
705 | * | |
706 | * RETURN: Status | |
707 | * | |
708 | * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in | |
709 | * all GPE blocks. | |
710 | * | |
711 | ******************************************************************************/ | |
e0fa975d RW |
712 | acpi_status acpi_enable_all_wakeup_gpes(void) |
713 | { | |
714 | acpi_status status; | |
715 | ||
716 | ACPI_FUNCTION_TRACE(acpi_enable_all_wakeup_gpes); | |
717 | ||
718 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
719 | if (ACPI_FAILURE(status)) { | |
720 | return_ACPI_STATUS(status); | |
721 | } | |
722 | ||
723 | status = acpi_hw_enable_all_wakeup_gpes(); | |
724 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
725 | ||
726 | return_ACPI_STATUS(status); | |
727 | } | |
728 | ||
729 | ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes) | |
730 | ||
3cfd53d5 LM |
731 | /******************************************************************************* |
732 | * | |
733 | * FUNCTION: acpi_install_gpe_block | |
734 | * | |
735 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
ba494bee | 736 | * gpe_block_address - Address and space_ID |
3cfd53d5 LM |
737 | * register_count - Number of GPE register pairs in the block |
738 | * interrupt_number - H/W interrupt for the block | |
739 | * | |
740 | * RETURN: Status | |
741 | * | |
da503373 LM |
742 | * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not |
743 | * enabled here. | |
3cfd53d5 LM |
744 | * |
745 | ******************************************************************************/ | |
746 | acpi_status | |
747 | acpi_install_gpe_block(acpi_handle gpe_device, | |
748 | struct acpi_generic_address *gpe_block_address, | |
749 | u32 register_count, u32 interrupt_number) | |
750 | { | |
3a37898d | 751 | acpi_status status; |
3cfd53d5 LM |
752 | union acpi_operand_object *obj_desc; |
753 | struct acpi_namespace_node *node; | |
754 | struct acpi_gpe_block_info *gpe_block; | |
755 | ||
756 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); | |
757 | ||
758 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { | |
759 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
760 | } | |
761 | ||
762 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
763 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 764 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
765 | } |
766 | ||
767 | node = acpi_ns_validate_handle(gpe_device); | |
768 | if (!node) { | |
769 | status = AE_BAD_PARAMETER; | |
770 | goto unlock_and_exit; | |
771 | } | |
772 | ||
9186fb58 BM |
773 | /* Validate the parent device */ |
774 | ||
775 | if (node->type != ACPI_TYPE_DEVICE) { | |
776 | status = AE_TYPE; | |
777 | goto unlock_and_exit; | |
778 | } | |
779 | ||
780 | if (node->object) { | |
781 | status = AE_ALREADY_EXISTS; | |
782 | goto unlock_and_exit; | |
783 | } | |
784 | ||
3cfd53d5 LM |
785 | /* |
786 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
787 | * is always zero | |
788 | */ | |
7505da4c BM |
789 | status = acpi_ev_create_gpe_block(node, gpe_block_address->address, |
790 | gpe_block_address->space_id, | |
791 | register_count, 0, interrupt_number, | |
792 | &gpe_block); | |
3cfd53d5 LM |
793 | if (ACPI_FAILURE(status)) { |
794 | goto unlock_and_exit; | |
795 | } | |
796 | ||
797 | /* Install block in the device_object attached to the node */ | |
798 | ||
799 | obj_desc = acpi_ns_get_attached_object(node); | |
800 | if (!obj_desc) { | |
801 | ||
802 | /* | |
803 | * No object, create a new one (Device nodes do not always have | |
804 | * an attached object) | |
805 | */ | |
806 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); | |
807 | if (!obj_desc) { | |
808 | status = AE_NO_MEMORY; | |
809 | goto unlock_and_exit; | |
810 | } | |
811 | ||
812 | status = | |
813 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
814 | ||
815 | /* Remove local reference to the object */ | |
816 | ||
817 | acpi_ut_remove_reference(obj_desc); | |
818 | ||
819 | if (ACPI_FAILURE(status)) { | |
820 | goto unlock_and_exit; | |
821 | } | |
822 | } | |
823 | ||
824 | /* Now install the GPE block in the device_object */ | |
825 | ||
826 | obj_desc->device.gpe_block = gpe_block; | |
827 | ||
10622bf8 | 828 | unlock_and_exit: |
3cfd53d5 LM |
829 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
830 | return_ACPI_STATUS(status); | |
831 | } | |
832 | ||
833 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) | |
834 | ||
835 | /******************************************************************************* | |
836 | * | |
837 | * FUNCTION: acpi_remove_gpe_block | |
838 | * | |
839 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
840 | * | |
841 | * RETURN: Status | |
842 | * | |
843 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
844 | * | |
845 | ******************************************************************************/ | |
846 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) | |
847 | { | |
848 | union acpi_operand_object *obj_desc; | |
849 | acpi_status status; | |
850 | struct acpi_namespace_node *node; | |
851 | ||
852 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); | |
853 | ||
854 | if (!gpe_device) { | |
855 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
856 | } | |
857 | ||
858 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
859 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 860 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
861 | } |
862 | ||
863 | node = acpi_ns_validate_handle(gpe_device); | |
864 | if (!node) { | |
865 | status = AE_BAD_PARAMETER; | |
866 | goto unlock_and_exit; | |
867 | } | |
868 | ||
9186fb58 BM |
869 | /* Validate the parent device */ |
870 | ||
871 | if (node->type != ACPI_TYPE_DEVICE) { | |
872 | status = AE_TYPE; | |
873 | goto unlock_and_exit; | |
874 | } | |
875 | ||
3cfd53d5 LM |
876 | /* Get the device_object attached to the node */ |
877 | ||
878 | obj_desc = acpi_ns_get_attached_object(node); | |
879 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
880 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
881 | } | |
882 | ||
883 | /* Delete the GPE block (but not the device_object) */ | |
884 | ||
885 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); | |
886 | if (ACPI_SUCCESS(status)) { | |
887 | obj_desc->device.gpe_block = NULL; | |
888 | } | |
889 | ||
10622bf8 | 890 | unlock_and_exit: |
3cfd53d5 LM |
891 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
892 | return_ACPI_STATUS(status); | |
893 | } | |
894 | ||
895 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) | |
896 | ||
897 | /******************************************************************************* | |
898 | * | |
899 | * FUNCTION: acpi_get_gpe_device | |
900 | * | |
ba494bee | 901 | * PARAMETERS: index - System GPE index (0-current_gpe_count) |
3cfd53d5 LM |
902 | * gpe_device - Where the parent GPE Device is returned |
903 | * | |
904 | * RETURN: Status | |
905 | * | |
906 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL | |
907 | * gpe device indicates that the gpe number is contained in one of | |
908 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. | |
909 | * | |
910 | ******************************************************************************/ | |
1f86e8c1 | 911 | acpi_status acpi_get_gpe_device(u32 index, acpi_handle * gpe_device) |
3cfd53d5 LM |
912 | { |
913 | struct acpi_gpe_device_info info; | |
914 | acpi_status status; | |
915 | ||
916 | ACPI_FUNCTION_TRACE(acpi_get_gpe_device); | |
917 | ||
918 | if (!gpe_device) { | |
919 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
920 | } | |
921 | ||
922 | if (index >= acpi_current_gpe_count) { | |
923 | return_ACPI_STATUS(AE_NOT_EXIST); | |
924 | } | |
925 | ||
926 | /* Setup and walk the GPE list */ | |
927 | ||
928 | info.index = index; | |
929 | info.status = AE_NOT_EXIST; | |
930 | info.gpe_device = NULL; | |
931 | info.next_block_base_index = 0; | |
932 | ||
933 | status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); | |
934 | if (ACPI_FAILURE(status)) { | |
935 | return_ACPI_STATUS(status); | |
936 | } | |
937 | ||
3a37898d | 938 | *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device); |
3cfd53d5 LM |
939 | return_ACPI_STATUS(info.status); |
940 | } | |
941 | ||
942 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) | |
33620c54 | 943 | #endif /* !ACPI_REDUCED_HARDWARE */ |