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3cfd53d5 LM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, 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 | |
2eedd3d8 LZ |
197 | * the reference count mechanism used in the acpi_enable_gpe(), |
198 | * acpi_disable_gpe() interfaces. | |
199 | * This API is typically used by the GPE raw handler mode driver | |
200 | * to switch between the polling mode and the interrupt mode after | |
201 | * the driver has enabled the GPE. | |
202 | * The APIs should be invoked in this order: | |
203 | * acpi_enable_gpe() <- Ensure the reference count > 0 | |
204 | * acpi_set_gpe(ACPI_GPE_DISABLE) <- Enter polling mode | |
205 | * acpi_set_gpe(ACPI_GPE_ENABLE) <- Leave polling mode | |
206 | * acpi_disable_gpe() <- Decrease the reference count | |
207 | * | |
208 | * Note: If a GPE is shared by 2 silicon components, then both the drivers | |
209 | * should support GPE polling mode or disabling the GPE for long period | |
210 | * for one driver may break the other. So use it with care since all | |
211 | * firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode. | |
eb3d80f7 LZ |
212 | * |
213 | ******************************************************************************/ | |
214 | acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action) | |
215 | { | |
216 | struct acpi_gpe_event_info *gpe_event_info; | |
217 | acpi_status status; | |
218 | acpi_cpu_flags flags; | |
219 | ||
220 | ACPI_FUNCTION_TRACE(acpi_set_gpe); | |
221 | ||
222 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
223 | ||
224 | /* Ensure that we have a valid GPE number */ | |
225 | ||
226 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
227 | if (!gpe_event_info) { | |
228 | status = AE_BAD_PARAMETER; | |
229 | goto unlock_and_exit; | |
230 | } | |
231 | ||
232 | /* Perform the action */ | |
233 | ||
234 | switch (action) { | |
235 | case ACPI_GPE_ENABLE: | |
236 | ||
2eedd3d8 | 237 | status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE); |
eb3d80f7 LZ |
238 | break; |
239 | ||
240 | case ACPI_GPE_DISABLE: | |
241 | ||
242 | status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); | |
243 | break; | |
244 | ||
245 | default: | |
246 | ||
247 | status = AE_BAD_PARAMETER; | |
248 | break; | |
249 | } | |
250 | ||
251 | unlock_and_exit: | |
252 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
253 | return_ACPI_STATUS(status); | |
254 | } | |
255 | ||
256 | ACPI_EXPORT_SYMBOL(acpi_set_gpe) | |
bba63a29 | 257 | |
c12f07d1 RW |
258 | /******************************************************************************* |
259 | * | |
260 | * FUNCTION: acpi_mark_gpe_for_wake | |
261 | * | |
262 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
263 | * gpe_number - GPE level within the GPE block | |
264 | * | |
265 | * RETURN: Status | |
266 | * | |
267 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply | |
268 | * sets the ACPI_GPE_CAN_WAKE flag. | |
269 | * | |
270 | * Some potential callers of acpi_setup_gpe_for_wake may know in advance that | |
271 | * there won't be any notify handlers installed for device wake notifications | |
272 | * from the given GPE (one example is a button GPE in Linux). For these cases, | |
273 | * acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake. | |
274 | * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to | |
275 | * setup implicit wake notification for it (since there's no handler method). | |
276 | * | |
277 | ******************************************************************************/ | |
278 | acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number) | |
279 | { | |
280 | struct acpi_gpe_event_info *gpe_event_info; | |
281 | acpi_status status = AE_BAD_PARAMETER; | |
282 | acpi_cpu_flags flags; | |
283 | ||
284 | ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake); | |
285 | ||
286 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
287 | ||
288 | /* Ensure that we have a valid GPE number */ | |
289 | ||
290 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
291 | if (gpe_event_info) { | |
292 | ||
293 | /* Mark the GPE as a possible wake event */ | |
294 | ||
295 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; | |
296 | status = AE_OK; | |
297 | } | |
298 | ||
299 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
300 | return_ACPI_STATUS(status); | |
301 | } | |
302 | ||
303 | ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake) | |
304 | ||
3cfd53d5 LM |
305 | /******************************************************************************* |
306 | * | |
3a37898d | 307 | * FUNCTION: acpi_setup_gpe_for_wake |
3cfd53d5 | 308 | * |
bba63a29 LM |
309 | * PARAMETERS: wake_device - Device associated with the GPE (via _PRW) |
310 | * gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
311 | * gpe_number - GPE level within the GPE block | |
3cfd53d5 LM |
312 | * |
313 | * RETURN: Status | |
314 | * | |
bba63a29 LM |
315 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. This |
316 | * interface is intended to be used as the host executes the | |
317 | * _PRW methods (Power Resources for Wake) in the system tables. | |
318 | * Each _PRW appears under a Device Object (The wake_device), and | |
319 | * contains the info for the wake GPE associated with the | |
320 | * wake_device. | |
3cfd53d5 LM |
321 | * |
322 | ******************************************************************************/ | |
bba63a29 LM |
323 | acpi_status |
324 | acpi_setup_gpe_for_wake(acpi_handle wake_device, | |
325 | acpi_handle gpe_device, u32 gpe_number) | |
3cfd53d5 | 326 | { |
5816b343 | 327 | acpi_status status; |
3cfd53d5 | 328 | struct acpi_gpe_event_info *gpe_event_info; |
bba63a29 | 329 | struct acpi_namespace_node *device_node; |
5816b343 BM |
330 | struct acpi_gpe_notify_info *notify; |
331 | struct acpi_gpe_notify_info *new_notify; | |
3cfd53d5 LM |
332 | acpi_cpu_flags flags; |
333 | ||
3a37898d | 334 | ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); |
3cfd53d5 | 335 | |
bba63a29 LM |
336 | /* Parameter Validation */ |
337 | ||
338 | if (!wake_device) { | |
339 | /* | |
340 | * By forcing wake_device to be valid, we automatically enable the | |
341 | * implicit notify feature on all hosts. | |
342 | */ | |
343 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
344 | } | |
345 | ||
5816b343 BM |
346 | /* Handle root object case */ |
347 | ||
348 | if (wake_device == ACPI_ROOT_OBJECT) { | |
349 | device_node = acpi_gbl_root_node; | |
350 | } else { | |
1f86e8c1 LZ |
351 | device_node = |
352 | ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); | |
5816b343 BM |
353 | } |
354 | ||
75c8044f | 355 | /* Validate wake_device is of type Device */ |
5816b343 BM |
356 | |
357 | if (device_node->type != ACPI_TYPE_DEVICE) { | |
358 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
359 | } | |
360 | ||
361 | /* | |
362 | * Allocate a new notify object up front, in case it is needed. | |
363 | * Memory allocation while holding a spinlock is a big no-no | |
364 | * on some hosts. | |
365 | */ | |
366 | new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info)); | |
367 | if (!new_notify) { | |
368 | return_ACPI_STATUS(AE_NO_MEMORY); | |
369 | } | |
370 | ||
3cfd53d5 LM |
371 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
372 | ||
373 | /* Ensure that we have a valid GPE number */ | |
374 | ||
375 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
2d559513 | 376 | if (!gpe_event_info) { |
5816b343 | 377 | status = AE_BAD_PARAMETER; |
2d559513 RW |
378 | goto unlock_and_exit; |
379 | } | |
bba63a29 | 380 | |
2d559513 RW |
381 | /* |
382 | * If there is no method or handler for this GPE, then the | |
5816b343 BM |
383 | * wake_device will be notified whenever this GPE fires. This is |
384 | * known as an "implicit notify". Note: The GPE is assumed to be | |
2d559513 RW |
385 | * level-triggered (for windows compatibility). |
386 | */ | |
7c43312a | 387 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
5816b343 BM |
388 | ACPI_GPE_DISPATCH_NONE) { |
389 | /* | |
390 | * This is the first device for implicit notify on this GPE. | |
391 | * Just set the flags here, and enter the NOTIFY block below. | |
392 | */ | |
393 | gpe_event_info->flags = | |
394 | (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); | |
981858bd RW |
395 | } |
396 | ||
5816b343 BM |
397 | /* |
398 | * If we already have an implicit notify on this GPE, add | |
399 | * this device to the notify list. | |
400 | */ | |
7c43312a | 401 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
5816b343 BM |
402 | ACPI_GPE_DISPATCH_NOTIFY) { |
403 | ||
404 | /* Ensure that the device is not already in the list */ | |
405 | ||
406 | notify = gpe_event_info->dispatch.notify_list; | |
407 | while (notify) { | |
408 | if (notify->device_node == device_node) { | |
409 | status = AE_ALREADY_EXISTS; | |
410 | goto unlock_and_exit; | |
411 | } | |
412 | notify = notify->next; | |
981858bd RW |
413 | } |
414 | ||
5816b343 BM |
415 | /* Add this device to the notify list for this GPE */ |
416 | ||
417 | new_notify->device_node = device_node; | |
418 | new_notify->next = gpe_event_info->dispatch.notify_list; | |
419 | gpe_event_info->dispatch.notify_list = new_notify; | |
420 | new_notify = NULL; | |
3cfd53d5 LM |
421 | } |
422 | ||
5816b343 BM |
423 | /* Mark the GPE as a possible wake event */ |
424 | ||
2d559513 RW |
425 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
426 | status = AE_OK; | |
427 | ||
5816b343 | 428 | unlock_and_exit: |
3cfd53d5 | 429 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
5816b343 BM |
430 | |
431 | /* Delete the notify object if it was not used above */ | |
432 | ||
433 | if (new_notify) { | |
434 | ACPI_FREE(new_notify); | |
435 | } | |
3cfd53d5 LM |
436 | return_ACPI_STATUS(status); |
437 | } | |
3a37898d | 438 | ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) |
3cfd53d5 LM |
439 | |
440 | /******************************************************************************* | |
441 | * | |
3a37898d | 442 | * FUNCTION: acpi_set_gpe_wake_mask |
3cfd53d5 LM |
443 | * |
444 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
445 | * gpe_number - GPE level within the GPE block | |
ba494bee | 446 | * action - Enable or Disable |
3cfd53d5 LM |
447 | * |
448 | * RETURN: Status | |
449 | * | |
da503373 LM |
450 | * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must |
451 | * already be marked as a WAKE GPE. | |
3cfd53d5 LM |
452 | * |
453 | ******************************************************************************/ | |
454 | ||
1f86e8c1 LZ |
455 | acpi_status |
456 | acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) | |
3cfd53d5 LM |
457 | { |
458 | acpi_status status = AE_OK; | |
459 | struct acpi_gpe_event_info *gpe_event_info; | |
460 | struct acpi_gpe_register_info *gpe_register_info; | |
461 | acpi_cpu_flags flags; | |
462 | u32 register_bit; | |
463 | ||
3a37898d | 464 | ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask); |
3cfd53d5 LM |
465 | |
466 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
467 | ||
da503373 LM |
468 | /* |
469 | * Ensure that we have a valid GPE number and that this GPE is in | |
470 | * fact a wake GPE | |
471 | */ | |
3cfd53d5 | 472 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
3a37898d | 473 | if (!gpe_event_info) { |
3cfd53d5 LM |
474 | status = AE_BAD_PARAMETER; |
475 | goto unlock_and_exit; | |
476 | } | |
477 | ||
3a37898d LM |
478 | if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { |
479 | status = AE_TYPE; | |
480 | goto unlock_and_exit; | |
481 | } | |
482 | ||
3cfd53d5 LM |
483 | gpe_register_info = gpe_event_info->register_info; |
484 | if (!gpe_register_info) { | |
485 | status = AE_NOT_EXIST; | |
486 | goto unlock_and_exit; | |
487 | } | |
488 | ||
1d94e1e8 | 489 | register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
3cfd53d5 LM |
490 | |
491 | /* Perform the action */ | |
492 | ||
493 | switch (action) { | |
494 | case ACPI_GPE_ENABLE: | |
1d1ea1b7 | 495 | |
3cfd53d5 LM |
496 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, |
497 | (u8)register_bit); | |
498 | break; | |
499 | ||
500 | case ACPI_GPE_DISABLE: | |
1d1ea1b7 | 501 | |
3cfd53d5 LM |
502 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
503 | (u8)register_bit); | |
504 | break; | |
505 | ||
506 | default: | |
1d1ea1b7 | 507 | |
3cfd53d5 LM |
508 | ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); |
509 | status = AE_BAD_PARAMETER; | |
510 | break; | |
511 | } | |
512 | ||
513 | unlock_and_exit: | |
514 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
515 | return_ACPI_STATUS(status); | |
516 | } | |
517 | ||
3a37898d | 518 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask) |
3cfd53d5 LM |
519 | |
520 | /******************************************************************************* | |
521 | * | |
522 | * FUNCTION: acpi_clear_gpe | |
523 | * | |
524 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
525 | * gpe_number - GPE level within the GPE block | |
526 | * | |
527 | * RETURN: Status | |
528 | * | |
529 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
530 | * | |
531 | ******************************************************************************/ | |
532 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) | |
533 | { | |
534 | acpi_status status = AE_OK; | |
535 | struct acpi_gpe_event_info *gpe_event_info; | |
536 | acpi_cpu_flags flags; | |
537 | ||
538 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); | |
539 | ||
540 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
541 | ||
542 | /* Ensure that we have a valid GPE number */ | |
543 | ||
544 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
545 | if (!gpe_event_info) { | |
546 | status = AE_BAD_PARAMETER; | |
547 | goto unlock_and_exit; | |
548 | } | |
549 | ||
550 | status = acpi_hw_clear_gpe(gpe_event_info); | |
551 | ||
552 | unlock_and_exit: | |
553 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
554 | return_ACPI_STATUS(status); | |
555 | } | |
556 | ||
557 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) | |
558 | ||
559 | /******************************************************************************* | |
560 | * | |
561 | * FUNCTION: acpi_get_gpe_status | |
562 | * | |
f19f1a7e LZ |
563 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
564 | * gpe_number - GPE level within the GPE block | |
75c8044f LZ |
565 | * event_status - Where the current status of the event |
566 | * will be returned | |
3cfd53d5 LM |
567 | * |
568 | * RETURN: Status | |
569 | * | |
da503373 | 570 | * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) |
3cfd53d5 LM |
571 | * |
572 | ******************************************************************************/ | |
573 | acpi_status | |
574 | acpi_get_gpe_status(acpi_handle gpe_device, | |
575 | u32 gpe_number, acpi_event_status *event_status) | |
576 | { | |
577 | acpi_status status = AE_OK; | |
578 | struct acpi_gpe_event_info *gpe_event_info; | |
579 | acpi_cpu_flags flags; | |
580 | ||
581 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); | |
582 | ||
583 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
584 | ||
585 | /* Ensure that we have a valid GPE number */ | |
586 | ||
587 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
588 | if (!gpe_event_info) { | |
589 | status = AE_BAD_PARAMETER; | |
590 | goto unlock_and_exit; | |
591 | } | |
592 | ||
593 | /* Obtain status on the requested GPE number */ | |
594 | ||
595 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); | |
596 | ||
10622bf8 | 597 | unlock_and_exit: |
3cfd53d5 LM |
598 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
599 | return_ACPI_STATUS(status); | |
600 | } | |
601 | ||
602 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
603 | ||
eb3d80f7 LZ |
604 | /******************************************************************************* |
605 | * | |
606 | * FUNCTION: acpi_finish_gpe | |
607 | * | |
608 | * PARAMETERS: gpe_device - Namespace node for the GPE Block | |
609 | * (NULL for FADT defined GPEs) | |
610 | * gpe_number - GPE level within the GPE block | |
611 | * | |
612 | * RETURN: Status | |
613 | * | |
614 | * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE | |
615 | * processing. Intended for use by asynchronous host-installed | |
616 | * GPE handlers. The GPE is only reenabled if the enable_for_run bit | |
617 | * is set in the GPE info. | |
618 | * | |
619 | ******************************************************************************/ | |
620 | acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number) | |
621 | { | |
622 | struct acpi_gpe_event_info *gpe_event_info; | |
623 | acpi_status status; | |
624 | acpi_cpu_flags flags; | |
625 | ||
626 | ACPI_FUNCTION_TRACE(acpi_finish_gpe); | |
627 | ||
628 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
629 | ||
630 | /* Ensure that we have a valid GPE number */ | |
631 | ||
632 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
633 | if (!gpe_event_info) { | |
634 | status = AE_BAD_PARAMETER; | |
635 | goto unlock_and_exit; | |
636 | } | |
637 | ||
638 | status = acpi_ev_finish_gpe(gpe_event_info); | |
639 | ||
640 | unlock_and_exit: | |
641 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
642 | return_ACPI_STATUS(status); | |
643 | } | |
644 | ||
645 | ACPI_EXPORT_SYMBOL(acpi_finish_gpe) | |
646 | ||
3cfd53d5 LM |
647 | /****************************************************************************** |
648 | * | |
649 | * FUNCTION: acpi_disable_all_gpes | |
650 | * | |
651 | * PARAMETERS: None | |
652 | * | |
653 | * RETURN: Status | |
654 | * | |
655 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks | |
656 | * | |
657 | ******************************************************************************/ | |
658 | ||
659 | acpi_status acpi_disable_all_gpes(void) | |
660 | { | |
661 | acpi_status status; | |
662 | ||
663 | ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); | |
664 | ||
665 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
666 | if (ACPI_FAILURE(status)) { | |
667 | return_ACPI_STATUS(status); | |
668 | } | |
669 | ||
670 | status = acpi_hw_disable_all_gpes(); | |
671 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
672 | ||
673 | return_ACPI_STATUS(status); | |
674 | } | |
675 | ||
3a37898d LM |
676 | ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes) |
677 | ||
3cfd53d5 LM |
678 | /****************************************************************************** |
679 | * | |
680 | * FUNCTION: acpi_enable_all_runtime_gpes | |
681 | * | |
682 | * PARAMETERS: None | |
683 | * | |
684 | * RETURN: Status | |
685 | * | |
686 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks | |
687 | * | |
688 | ******************************************************************************/ | |
689 | ||
690 | acpi_status acpi_enable_all_runtime_gpes(void) | |
691 | { | |
692 | acpi_status status; | |
693 | ||
694 | ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); | |
695 | ||
696 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
697 | if (ACPI_FAILURE(status)) { | |
698 | return_ACPI_STATUS(status); | |
699 | } | |
700 | ||
701 | status = acpi_hw_enable_all_runtime_gpes(); | |
702 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
703 | ||
704 | return_ACPI_STATUS(status); | |
705 | } | |
706 | ||
3a37898d LM |
707 | ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) |
708 | ||
e0fa975d RW |
709 | /****************************************************************************** |
710 | * | |
711 | * FUNCTION: acpi_enable_all_wakeup_gpes | |
712 | * | |
713 | * PARAMETERS: None | |
714 | * | |
715 | * RETURN: Status | |
716 | * | |
717 | * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in | |
718 | * all GPE blocks. | |
719 | * | |
720 | ******************************************************************************/ | |
e0fa975d RW |
721 | acpi_status acpi_enable_all_wakeup_gpes(void) |
722 | { | |
723 | acpi_status status; | |
724 | ||
725 | ACPI_FUNCTION_TRACE(acpi_enable_all_wakeup_gpes); | |
726 | ||
727 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
728 | if (ACPI_FAILURE(status)) { | |
729 | return_ACPI_STATUS(status); | |
730 | } | |
731 | ||
732 | status = acpi_hw_enable_all_wakeup_gpes(); | |
733 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
734 | ||
735 | return_ACPI_STATUS(status); | |
736 | } | |
737 | ||
738 | ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes) | |
739 | ||
3cfd53d5 LM |
740 | /******************************************************************************* |
741 | * | |
742 | * FUNCTION: acpi_install_gpe_block | |
743 | * | |
744 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
ba494bee | 745 | * gpe_block_address - Address and space_ID |
3cfd53d5 LM |
746 | * register_count - Number of GPE register pairs in the block |
747 | * interrupt_number - H/W interrupt for the block | |
748 | * | |
749 | * RETURN: Status | |
750 | * | |
da503373 LM |
751 | * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not |
752 | * enabled here. | |
3cfd53d5 LM |
753 | * |
754 | ******************************************************************************/ | |
755 | acpi_status | |
756 | acpi_install_gpe_block(acpi_handle gpe_device, | |
757 | struct acpi_generic_address *gpe_block_address, | |
758 | u32 register_count, u32 interrupt_number) | |
759 | { | |
3a37898d | 760 | acpi_status status; |
3cfd53d5 LM |
761 | union acpi_operand_object *obj_desc; |
762 | struct acpi_namespace_node *node; | |
763 | struct acpi_gpe_block_info *gpe_block; | |
764 | ||
765 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); | |
766 | ||
767 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { | |
768 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
769 | } | |
770 | ||
771 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
772 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 773 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
774 | } |
775 | ||
776 | node = acpi_ns_validate_handle(gpe_device); | |
777 | if (!node) { | |
778 | status = AE_BAD_PARAMETER; | |
779 | goto unlock_and_exit; | |
780 | } | |
781 | ||
9186fb58 BM |
782 | /* Validate the parent device */ |
783 | ||
784 | if (node->type != ACPI_TYPE_DEVICE) { | |
785 | status = AE_TYPE; | |
786 | goto unlock_and_exit; | |
787 | } | |
788 | ||
789 | if (node->object) { | |
790 | status = AE_ALREADY_EXISTS; | |
791 | goto unlock_and_exit; | |
792 | } | |
793 | ||
3cfd53d5 LM |
794 | /* |
795 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
796 | * is always zero | |
797 | */ | |
7505da4c BM |
798 | status = acpi_ev_create_gpe_block(node, gpe_block_address->address, |
799 | gpe_block_address->space_id, | |
800 | register_count, 0, interrupt_number, | |
801 | &gpe_block); | |
3cfd53d5 LM |
802 | if (ACPI_FAILURE(status)) { |
803 | goto unlock_and_exit; | |
804 | } | |
805 | ||
806 | /* Install block in the device_object attached to the node */ | |
807 | ||
808 | obj_desc = acpi_ns_get_attached_object(node); | |
809 | if (!obj_desc) { | |
810 | ||
811 | /* | |
812 | * No object, create a new one (Device nodes do not always have | |
813 | * an attached object) | |
814 | */ | |
815 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); | |
816 | if (!obj_desc) { | |
817 | status = AE_NO_MEMORY; | |
818 | goto unlock_and_exit; | |
819 | } | |
820 | ||
821 | status = | |
822 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
823 | ||
824 | /* Remove local reference to the object */ | |
825 | ||
826 | acpi_ut_remove_reference(obj_desc); | |
827 | ||
828 | if (ACPI_FAILURE(status)) { | |
829 | goto unlock_and_exit; | |
830 | } | |
831 | } | |
832 | ||
833 | /* Now install the GPE block in the device_object */ | |
834 | ||
835 | obj_desc->device.gpe_block = gpe_block; | |
836 | ||
10622bf8 | 837 | unlock_and_exit: |
3cfd53d5 LM |
838 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
839 | return_ACPI_STATUS(status); | |
840 | } | |
841 | ||
842 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) | |
843 | ||
844 | /******************************************************************************* | |
845 | * | |
846 | * FUNCTION: acpi_remove_gpe_block | |
847 | * | |
848 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
849 | * | |
850 | * RETURN: Status | |
851 | * | |
852 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
853 | * | |
854 | ******************************************************************************/ | |
855 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) | |
856 | { | |
857 | union acpi_operand_object *obj_desc; | |
858 | acpi_status status; | |
859 | struct acpi_namespace_node *node; | |
860 | ||
861 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); | |
862 | ||
863 | if (!gpe_device) { | |
864 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
865 | } | |
866 | ||
867 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
868 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 869 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
870 | } |
871 | ||
872 | node = acpi_ns_validate_handle(gpe_device); | |
873 | if (!node) { | |
874 | status = AE_BAD_PARAMETER; | |
875 | goto unlock_and_exit; | |
876 | } | |
877 | ||
9186fb58 BM |
878 | /* Validate the parent device */ |
879 | ||
880 | if (node->type != ACPI_TYPE_DEVICE) { | |
881 | status = AE_TYPE; | |
882 | goto unlock_and_exit; | |
883 | } | |
884 | ||
3cfd53d5 LM |
885 | /* Get the device_object attached to the node */ |
886 | ||
887 | obj_desc = acpi_ns_get_attached_object(node); | |
888 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
889 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
890 | } | |
891 | ||
892 | /* Delete the GPE block (but not the device_object) */ | |
893 | ||
894 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); | |
895 | if (ACPI_SUCCESS(status)) { | |
896 | obj_desc->device.gpe_block = NULL; | |
897 | } | |
898 | ||
10622bf8 | 899 | unlock_and_exit: |
3cfd53d5 LM |
900 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
901 | return_ACPI_STATUS(status); | |
902 | } | |
903 | ||
904 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) | |
905 | ||
906 | /******************************************************************************* | |
907 | * | |
908 | * FUNCTION: acpi_get_gpe_device | |
909 | * | |
ba494bee | 910 | * PARAMETERS: index - System GPE index (0-current_gpe_count) |
3cfd53d5 LM |
911 | * gpe_device - Where the parent GPE Device is returned |
912 | * | |
913 | * RETURN: Status | |
914 | * | |
915 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL | |
916 | * gpe device indicates that the gpe number is contained in one of | |
917 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. | |
918 | * | |
919 | ******************************************************************************/ | |
f5c1e1c5 | 920 | acpi_status acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) |
3cfd53d5 LM |
921 | { |
922 | struct acpi_gpe_device_info info; | |
923 | acpi_status status; | |
924 | ||
925 | ACPI_FUNCTION_TRACE(acpi_get_gpe_device); | |
926 | ||
927 | if (!gpe_device) { | |
928 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
929 | } | |
930 | ||
931 | if (index >= acpi_current_gpe_count) { | |
932 | return_ACPI_STATUS(AE_NOT_EXIST); | |
933 | } | |
934 | ||
935 | /* Setup and walk the GPE list */ | |
936 | ||
937 | info.index = index; | |
938 | info.status = AE_NOT_EXIST; | |
939 | info.gpe_device = NULL; | |
940 | info.next_block_base_index = 0; | |
941 | ||
942 | status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); | |
943 | if (ACPI_FAILURE(status)) { | |
944 | return_ACPI_STATUS(status); | |
945 | } | |
946 | ||
3a37898d | 947 | *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device); |
3cfd53d5 LM |
948 | return_ACPI_STATUS(info.status); |
949 | } | |
950 | ||
951 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) | |
33620c54 | 952 | #endif /* !ACPI_REDUCED_HARDWARE */ |