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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
50df4d8b | 45 | #include <acpi/accommon.h> |
1da177e4 LT |
46 | #include <acpi/acevents.h> |
47 | #include <acpi/acnamesp.h> | |
1a666f8b | 48 | #include <acpi/actables.h> |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 51 | ACPI_MODULE_NAME("evxfevnt") |
1da177e4 | 52 | |
e97d6bf1 BM |
53 | /* Local prototypes */ |
54 | acpi_status | |
55 | acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info, | |
56 | struct acpi_gpe_block_info *gpe_block, void *context); | |
57 | ||
1da177e4 LT |
58 | /******************************************************************************* |
59 | * | |
60 | * FUNCTION: acpi_enable | |
61 | * | |
62 | * PARAMETERS: None | |
63 | * | |
64 | * RETURN: Status | |
65 | * | |
66 | * DESCRIPTION: Transfers the system into ACPI mode. | |
67 | * | |
68 | ******************************************************************************/ | |
e97d6bf1 | 69 | |
4be44fcd | 70 | acpi_status acpi_enable(void) |
1da177e4 | 71 | { |
4be44fcd | 72 | acpi_status status = AE_OK; |
1da177e4 | 73 | |
b229cf92 | 74 | ACPI_FUNCTION_TRACE(acpi_enable); |
1da177e4 | 75 | |
c857303a BM |
76 | /* ACPI tables must be present */ |
77 | ||
78 | if (!acpi_tb_tables_loaded()) { | |
79 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); | |
80 | } | |
81 | ||
82 | /* Check current mode */ | |
83 | ||
1da177e4 | 84 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
4be44fcd LB |
85 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
86 | "System is already in ACPI mode\n")); | |
87 | } else { | |
1da177e4 LT |
88 | /* Transition to ACPI mode */ |
89 | ||
4be44fcd LB |
90 | status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
91 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
92 | ACPI_ERROR((AE_INFO, |
93 | "Could not transition to ACPI mode")); | |
4be44fcd | 94 | return_ACPI_STATUS(status); |
1da177e4 LT |
95 | } |
96 | ||
4be44fcd LB |
97 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
98 | "Transition to ACPI mode successful\n")); | |
1da177e4 LT |
99 | } |
100 | ||
4be44fcd | 101 | return_ACPI_STATUS(status); |
1da177e4 LT |
102 | } |
103 | ||
8313524a BM |
104 | ACPI_EXPORT_SYMBOL(acpi_enable) |
105 | ||
1da177e4 LT |
106 | /******************************************************************************* |
107 | * | |
108 | * FUNCTION: acpi_disable | |
109 | * | |
110 | * PARAMETERS: None | |
111 | * | |
112 | * RETURN: Status | |
113 | * | |
44f6c012 | 114 | * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. |
1da177e4 LT |
115 | * |
116 | ******************************************************************************/ | |
4be44fcd | 117 | acpi_status acpi_disable(void) |
1da177e4 | 118 | { |
4be44fcd | 119 | acpi_status status = AE_OK; |
1da177e4 | 120 | |
b229cf92 | 121 | ACPI_FUNCTION_TRACE(acpi_disable); |
1da177e4 | 122 | |
1da177e4 | 123 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { |
4be44fcd LB |
124 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
125 | "System is already in legacy (non-ACPI) mode\n")); | |
126 | } else { | |
1da177e4 LT |
127 | /* Transition to LEGACY mode */ |
128 | ||
4be44fcd | 129 | status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
1da177e4 | 130 | |
4be44fcd | 131 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
132 | ACPI_ERROR((AE_INFO, |
133 | "Could not exit ACPI mode to legacy mode")); | |
4be44fcd | 134 | return_ACPI_STATUS(status); |
1da177e4 LT |
135 | } |
136 | ||
4be44fcd | 137 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
1da177e4 LT |
138 | } |
139 | ||
4be44fcd | 140 | return_ACPI_STATUS(status); |
1da177e4 LT |
141 | } |
142 | ||
8313524a BM |
143 | ACPI_EXPORT_SYMBOL(acpi_disable) |
144 | ||
1da177e4 LT |
145 | /******************************************************************************* |
146 | * | |
147 | * FUNCTION: acpi_enable_event | |
148 | * | |
149 | * PARAMETERS: Event - The fixed eventto be enabled | |
150 | * Flags - Reserved | |
151 | * | |
152 | * RETURN: Status | |
153 | * | |
154 | * DESCRIPTION: Enable an ACPI event (fixed) | |
155 | * | |
156 | ******************************************************************************/ | |
4be44fcd | 157 | acpi_status acpi_enable_event(u32 event, u32 flags) |
1da177e4 | 158 | { |
4be44fcd LB |
159 | acpi_status status = AE_OK; |
160 | u32 value; | |
1da177e4 | 161 | |
b229cf92 | 162 | ACPI_FUNCTION_TRACE(acpi_enable_event); |
1da177e4 LT |
163 | |
164 | /* Decode the Fixed Event */ | |
165 | ||
166 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 167 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
168 | } |
169 | ||
170 | /* | |
9f15fc66 BM |
171 | * Enable the requested fixed event (by writing a one to the enable |
172 | * register bit) | |
1da177e4 | 173 | */ |
4be44fcd LB |
174 | status = |
175 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
d8c71b6d | 176 | enable_register_id, 1); |
4be44fcd LB |
177 | if (ACPI_FAILURE(status)) { |
178 | return_ACPI_STATUS(status); | |
1da177e4 LT |
179 | } |
180 | ||
181 | /* Make sure that the hardware responded */ | |
182 | ||
4be44fcd LB |
183 | status = |
184 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
d8c71b6d | 185 | enable_register_id, &value); |
4be44fcd LB |
186 | if (ACPI_FAILURE(status)) { |
187 | return_ACPI_STATUS(status); | |
1da177e4 LT |
188 | } |
189 | ||
190 | if (value != 1) { | |
b8e4d893 BM |
191 | ACPI_ERROR((AE_INFO, |
192 | "Could not enable %s event", | |
193 | acpi_ut_get_event_name(event))); | |
4be44fcd | 194 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
195 | } |
196 | ||
4be44fcd | 197 | return_ACPI_STATUS(status); |
1da177e4 | 198 | } |
1da177e4 | 199 | |
8313524a | 200 | ACPI_EXPORT_SYMBOL(acpi_enable_event) |
1da177e4 LT |
201 | |
202 | /******************************************************************************* | |
203 | * | |
204 | * FUNCTION: acpi_set_gpe_type | |
205 | * | |
206 | * PARAMETERS: gpe_device - Parent GPE Device | |
207 | * gpe_number - GPE level within the GPE block | |
208 | * Type - New GPE type | |
209 | * | |
210 | * RETURN: Status | |
211 | * | |
44f6c012 | 212 | * DESCRIPTION: Set the type of an individual GPE |
1da177e4 LT |
213 | * |
214 | ******************************************************************************/ | |
4be44fcd | 215 | acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type) |
1da177e4 | 216 | { |
4be44fcd LB |
217 | acpi_status status = AE_OK; |
218 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 219 | |
b229cf92 | 220 | ACPI_FUNCTION_TRACE(acpi_set_gpe_type); |
1da177e4 LT |
221 | |
222 | /* Ensure that we have a valid GPE number */ | |
223 | ||
4be44fcd | 224 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
225 | if (!gpe_event_info) { |
226 | status = AE_BAD_PARAMETER; | |
227 | goto unlock_and_exit; | |
228 | } | |
229 | ||
230 | if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) { | |
4be44fcd | 231 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
232 | } |
233 | ||
234 | /* Set the new type (will disable GPE if currently enabled) */ | |
235 | ||
4be44fcd | 236 | status = acpi_ev_set_gpe_type(gpe_event_info, type); |
1da177e4 | 237 | |
4be44fcd LB |
238 | unlock_and_exit: |
239 | return_ACPI_STATUS(status); | |
1da177e4 | 240 | } |
1da177e4 | 241 | |
8313524a | 242 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_type) |
1da177e4 LT |
243 | |
244 | /******************************************************************************* | |
245 | * | |
246 | * FUNCTION: acpi_enable_gpe | |
247 | * | |
248 | * PARAMETERS: gpe_device - Parent GPE Device | |
249 | * gpe_number - GPE level within the GPE block | |
250 | * Flags - Just enable, or also wake enable? | |
251 | * Called from ISR or not | |
252 | * | |
253 | * RETURN: Status | |
254 | * | |
255 | * DESCRIPTION: Enable an ACPI event (general purpose) | |
256 | * | |
257 | ******************************************************************************/ | |
0b7084ac | 258 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) |
1da177e4 | 259 | { |
4be44fcd | 260 | acpi_status status = AE_OK; |
0b7084ac | 261 | acpi_cpu_flags flags; |
4be44fcd | 262 | struct acpi_gpe_event_info *gpe_event_info; |
1da177e4 | 263 | |
b229cf92 | 264 | ACPI_FUNCTION_TRACE(acpi_enable_gpe); |
1da177e4 | 265 | |
0b7084ac | 266 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
267 | |
268 | /* Ensure that we have a valid GPE number */ | |
269 | ||
4be44fcd | 270 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
271 | if (!gpe_event_info) { |
272 | status = AE_BAD_PARAMETER; | |
273 | goto unlock_and_exit; | |
274 | } | |
275 | ||
276 | /* Perform the enable */ | |
277 | ||
4be44fcd | 278 | status = acpi_ev_enable_gpe(gpe_event_info, TRUE); |
1da177e4 | 279 | |
4be44fcd | 280 | unlock_and_exit: |
0b7084ac | 281 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
4be44fcd | 282 | return_ACPI_STATUS(status); |
1da177e4 | 283 | } |
1da177e4 | 284 | |
8313524a | 285 | ACPI_EXPORT_SYMBOL(acpi_enable_gpe) |
1da177e4 LT |
286 | |
287 | /******************************************************************************* | |
288 | * | |
289 | * FUNCTION: acpi_disable_gpe | |
290 | * | |
291 | * PARAMETERS: gpe_device - Parent GPE Device | |
292 | * gpe_number - GPE level within the GPE block | |
293 | * Flags - Just disable, or also wake disable? | |
294 | * Called from ISR or not | |
295 | * | |
296 | * RETURN: Status | |
297 | * | |
298 | * DESCRIPTION: Disable an ACPI event (general purpose) | |
299 | * | |
300 | ******************************************************************************/ | |
0b7084ac | 301 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) |
1da177e4 | 302 | { |
4be44fcd | 303 | acpi_status status = AE_OK; |
0b7084ac | 304 | acpi_cpu_flags flags; |
4be44fcd | 305 | struct acpi_gpe_event_info *gpe_event_info; |
1da177e4 | 306 | |
b229cf92 | 307 | ACPI_FUNCTION_TRACE(acpi_disable_gpe); |
1da177e4 | 308 | |
0b7084ac | 309 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
310 | /* Ensure that we have a valid GPE number */ |
311 | ||
4be44fcd | 312 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
313 | if (!gpe_event_info) { |
314 | status = AE_BAD_PARAMETER; | |
315 | goto unlock_and_exit; | |
316 | } | |
317 | ||
4be44fcd | 318 | status = acpi_ev_disable_gpe(gpe_event_info); |
1da177e4 | 319 | |
0b7084ac AS |
320 | unlock_and_exit: |
321 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
4be44fcd | 322 | return_ACPI_STATUS(status); |
1da177e4 LT |
323 | } |
324 | ||
8313524a BM |
325 | ACPI_EXPORT_SYMBOL(acpi_disable_gpe) |
326 | ||
1da177e4 LT |
327 | /******************************************************************************* |
328 | * | |
329 | * FUNCTION: acpi_disable_event | |
330 | * | |
331 | * PARAMETERS: Event - The fixed eventto be enabled | |
332 | * Flags - Reserved | |
333 | * | |
334 | * RETURN: Status | |
335 | * | |
336 | * DESCRIPTION: Disable an ACPI event (fixed) | |
337 | * | |
338 | ******************************************************************************/ | |
4be44fcd | 339 | acpi_status acpi_disable_event(u32 event, u32 flags) |
1da177e4 | 340 | { |
4be44fcd LB |
341 | acpi_status status = AE_OK; |
342 | u32 value; | |
1da177e4 | 343 | |
b229cf92 | 344 | ACPI_FUNCTION_TRACE(acpi_disable_event); |
1da177e4 LT |
345 | |
346 | /* Decode the Fixed Event */ | |
347 | ||
348 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 349 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
350 | } |
351 | ||
352 | /* | |
9f15fc66 BM |
353 | * Disable the requested fixed event (by writing a zero to the enable |
354 | * register bit) | |
1da177e4 | 355 | */ |
4be44fcd LB |
356 | status = |
357 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
d8c71b6d | 358 | enable_register_id, 0); |
4be44fcd LB |
359 | if (ACPI_FAILURE(status)) { |
360 | return_ACPI_STATUS(status); | |
1da177e4 LT |
361 | } |
362 | ||
4be44fcd LB |
363 | status = |
364 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
d8c71b6d | 365 | enable_register_id, &value); |
4be44fcd LB |
366 | if (ACPI_FAILURE(status)) { |
367 | return_ACPI_STATUS(status); | |
1da177e4 LT |
368 | } |
369 | ||
370 | if (value != 0) { | |
b8e4d893 BM |
371 | ACPI_ERROR((AE_INFO, |
372 | "Could not disable %s events", | |
373 | acpi_ut_get_event_name(event))); | |
4be44fcd | 374 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
375 | } |
376 | ||
4be44fcd | 377 | return_ACPI_STATUS(status); |
1da177e4 | 378 | } |
1da177e4 | 379 | |
8313524a | 380 | ACPI_EXPORT_SYMBOL(acpi_disable_event) |
1da177e4 LT |
381 | |
382 | /******************************************************************************* | |
383 | * | |
384 | * FUNCTION: acpi_clear_event | |
385 | * | |
386 | * PARAMETERS: Event - The fixed event to be cleared | |
387 | * | |
388 | * RETURN: Status | |
389 | * | |
390 | * DESCRIPTION: Clear an ACPI event (fixed) | |
391 | * | |
392 | ******************************************************************************/ | |
4be44fcd | 393 | acpi_status acpi_clear_event(u32 event) |
1da177e4 | 394 | { |
4be44fcd | 395 | acpi_status status = AE_OK; |
1da177e4 | 396 | |
b229cf92 | 397 | ACPI_FUNCTION_TRACE(acpi_clear_event); |
1da177e4 LT |
398 | |
399 | /* Decode the Fixed Event */ | |
400 | ||
401 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 402 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
403 | } |
404 | ||
405 | /* | |
9f15fc66 BM |
406 | * Clear the requested fixed event (By writing a one to the status |
407 | * register bit) | |
1da177e4 | 408 | */ |
4be44fcd LB |
409 | status = |
410 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
d8c71b6d | 411 | status_register_id, 1); |
1da177e4 | 412 | |
4be44fcd | 413 | return_ACPI_STATUS(status); |
1da177e4 | 414 | } |
1da177e4 | 415 | |
8313524a | 416 | ACPI_EXPORT_SYMBOL(acpi_clear_event) |
1da177e4 LT |
417 | |
418 | /******************************************************************************* | |
419 | * | |
420 | * FUNCTION: acpi_clear_gpe | |
421 | * | |
422 | * PARAMETERS: gpe_device - Parent GPE Device | |
423 | * gpe_number - GPE level within the GPE block | |
424 | * Flags - Called from an ISR or not | |
425 | * | |
426 | * RETURN: Status | |
427 | * | |
428 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
429 | * | |
430 | ******************************************************************************/ | |
4be44fcd | 431 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
1da177e4 | 432 | { |
4be44fcd LB |
433 | acpi_status status = AE_OK; |
434 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 435 | |
b229cf92 | 436 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); |
1da177e4 LT |
437 | |
438 | /* Use semaphore lock if not executing at interrupt level */ | |
439 | ||
440 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
441 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
442 | if (ACPI_FAILURE(status)) { | |
443 | return_ACPI_STATUS(status); | |
1da177e4 LT |
444 | } |
445 | } | |
446 | ||
447 | /* Ensure that we have a valid GPE number */ | |
448 | ||
4be44fcd | 449 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
450 | if (!gpe_event_info) { |
451 | status = AE_BAD_PARAMETER; | |
452 | goto unlock_and_exit; | |
453 | } | |
454 | ||
4be44fcd | 455 | status = acpi_hw_clear_gpe(gpe_event_info); |
1da177e4 | 456 | |
4be44fcd | 457 | unlock_and_exit: |
1da177e4 | 458 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 459 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 460 | } |
4be44fcd | 461 | return_ACPI_STATUS(status); |
1da177e4 LT |
462 | } |
463 | ||
8313524a | 464 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) |
1da177e4 LT |
465 | /******************************************************************************* |
466 | * | |
467 | * FUNCTION: acpi_get_event_status | |
468 | * | |
469 | * PARAMETERS: Event - The fixed event | |
44f6c012 | 470 | * event_status - Where the current status of the event will |
1da177e4 LT |
471 | * be returned |
472 | * | |
473 | * RETURN: Status | |
474 | * | |
475 | * DESCRIPTION: Obtains and returns the current status of the event | |
476 | * | |
477 | ******************************************************************************/ | |
4be44fcd | 478 | acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status) |
1da177e4 | 479 | { |
4be44fcd | 480 | acpi_status status = AE_OK; |
71b58cbb | 481 | u32 value; |
1da177e4 | 482 | |
b229cf92 | 483 | ACPI_FUNCTION_TRACE(acpi_get_event_status); |
1da177e4 LT |
484 | |
485 | if (!event_status) { | |
4be44fcd | 486 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
487 | } |
488 | ||
489 | /* Decode the Fixed Event */ | |
490 | ||
491 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 492 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
493 | } |
494 | ||
495 | /* Get the status of the requested fixed event */ | |
496 | ||
4be44fcd LB |
497 | status = |
498 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
71b58cbb ZR |
499 | enable_register_id, &value); |
500 | if (ACPI_FAILURE(status)) | |
501 | return_ACPI_STATUS(status); | |
502 | ||
503 | *event_status = value; | |
504 | ||
505 | status = | |
506 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
507 | status_register_id, &value); | |
508 | if (ACPI_FAILURE(status)) | |
509 | return_ACPI_STATUS(status); | |
510 | ||
511 | if (value) | |
512 | *event_status |= ACPI_EVENT_FLAG_SET; | |
1da177e4 | 513 | |
ed206fac ZR |
514 | if (acpi_gbl_fixed_event_handlers[event].handler) |
515 | *event_status |= ACPI_EVENT_FLAG_HANDLE; | |
516 | ||
4be44fcd | 517 | return_ACPI_STATUS(status); |
1da177e4 LT |
518 | } |
519 | ||
8313524a BM |
520 | ACPI_EXPORT_SYMBOL(acpi_get_event_status) |
521 | ||
1da177e4 LT |
522 | /******************************************************************************* |
523 | * | |
524 | * FUNCTION: acpi_get_gpe_status | |
525 | * | |
526 | * PARAMETERS: gpe_device - Parent GPE Device | |
527 | * gpe_number - GPE level within the GPE block | |
528 | * Flags - Called from an ISR or not | |
44f6c012 | 529 | * event_status - Where the current status of the event will |
1da177e4 LT |
530 | * be returned |
531 | * | |
532 | * RETURN: Status | |
533 | * | |
534 | * DESCRIPTION: Get status of an event (general purpose) | |
535 | * | |
536 | ******************************************************************************/ | |
1da177e4 | 537 | acpi_status |
4be44fcd LB |
538 | acpi_get_gpe_status(acpi_handle gpe_device, |
539 | u32 gpe_number, u32 flags, acpi_event_status * event_status) | |
1da177e4 | 540 | { |
4be44fcd LB |
541 | acpi_status status = AE_OK; |
542 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 543 | |
b229cf92 | 544 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); |
1da177e4 LT |
545 | |
546 | /* Use semaphore lock if not executing at interrupt level */ | |
547 | ||
548 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
549 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
550 | if (ACPI_FAILURE(status)) { | |
551 | return_ACPI_STATUS(status); | |
1da177e4 LT |
552 | } |
553 | } | |
554 | ||
555 | /* Ensure that we have a valid GPE number */ | |
556 | ||
4be44fcd | 557 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
558 | if (!gpe_event_info) { |
559 | status = AE_BAD_PARAMETER; | |
560 | goto unlock_and_exit; | |
561 | } | |
562 | ||
563 | /* Obtain status on the requested GPE number */ | |
564 | ||
4be44fcd | 565 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); |
1da177e4 | 566 | |
ed206fac ZR |
567 | if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) |
568 | *event_status |= ACPI_EVENT_FLAG_HANDLE; | |
569 | ||
4be44fcd | 570 | unlock_and_exit: |
1da177e4 | 571 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 572 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 573 | } |
4be44fcd | 574 | return_ACPI_STATUS(status); |
1da177e4 | 575 | } |
8313524a BM |
576 | |
577 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
1da177e4 LT |
578 | /******************************************************************************* |
579 | * | |
580 | * FUNCTION: acpi_install_gpe_block | |
581 | * | |
582 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
583 | * gpe_block_address - Address and space_iD | |
584 | * register_count - Number of GPE register pairs in the block | |
6f42ccf2 | 585 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
586 | * |
587 | * RETURN: Status | |
588 | * | |
589 | * DESCRIPTION: Create and Install a block of GPE registers | |
590 | * | |
591 | ******************************************************************************/ | |
1da177e4 | 592 | acpi_status |
4be44fcd LB |
593 | acpi_install_gpe_block(acpi_handle gpe_device, |
594 | struct acpi_generic_address *gpe_block_address, | |
595 | u32 register_count, u32 interrupt_number) | |
1da177e4 | 596 | { |
4be44fcd LB |
597 | acpi_status status; |
598 | union acpi_operand_object *obj_desc; | |
599 | struct acpi_namespace_node *node; | |
600 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 601 | |
b229cf92 | 602 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); |
1da177e4 | 603 | |
4be44fcd LB |
604 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { |
605 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
606 | } |
607 | ||
4be44fcd LB |
608 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
609 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
610 | return (status); |
611 | } | |
612 | ||
4be44fcd | 613 | node = acpi_ns_map_handle_to_node(gpe_device); |
1da177e4 LT |
614 | if (!node) { |
615 | status = AE_BAD_PARAMETER; | |
616 | goto unlock_and_exit; | |
617 | } | |
618 | ||
619 | /* | |
620 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
621 | * is always zero | |
622 | */ | |
4be44fcd LB |
623 | status = |
624 | acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, | |
625 | interrupt_number, &gpe_block); | |
626 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
627 | goto unlock_and_exit; |
628 | } | |
629 | ||
96db255c BM |
630 | /* Run the _PRW methods and enable the GPEs */ |
631 | ||
632 | status = acpi_ev_initialize_gpe_block(node, gpe_block); | |
633 | if (ACPI_FAILURE(status)) { | |
634 | goto unlock_and_exit; | |
635 | } | |
636 | ||
1da177e4 LT |
637 | /* Get the device_object attached to the node */ |
638 | ||
4be44fcd | 639 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 640 | if (!obj_desc) { |
52fc0b02 | 641 | |
1da177e4 LT |
642 | /* No object, create a new one */ |
643 | ||
4be44fcd | 644 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); |
1da177e4 LT |
645 | if (!obj_desc) { |
646 | status = AE_NO_MEMORY; | |
647 | goto unlock_and_exit; | |
648 | } | |
649 | ||
4be44fcd LB |
650 | status = |
651 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
1da177e4 LT |
652 | |
653 | /* Remove local reference to the object */ | |
654 | ||
4be44fcd | 655 | acpi_ut_remove_reference(obj_desc); |
1da177e4 | 656 | |
4be44fcd | 657 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
658 | goto unlock_and_exit; |
659 | } | |
660 | } | |
661 | ||
662 | /* Install the GPE block in the device_object */ | |
663 | ||
664 | obj_desc->device.gpe_block = gpe_block; | |
665 | ||
4be44fcd LB |
666 | unlock_and_exit: |
667 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
668 | return_ACPI_STATUS(status); | |
1da177e4 | 669 | } |
1da177e4 | 670 | |
8313524a | 671 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) |
1da177e4 LT |
672 | |
673 | /******************************************************************************* | |
674 | * | |
675 | * FUNCTION: acpi_remove_gpe_block | |
676 | * | |
677 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
678 | * | |
679 | * RETURN: Status | |
680 | * | |
681 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
682 | * | |
683 | ******************************************************************************/ | |
4be44fcd | 684 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) |
1da177e4 | 685 | { |
4be44fcd LB |
686 | union acpi_operand_object *obj_desc; |
687 | acpi_status status; | |
688 | struct acpi_namespace_node *node; | |
1da177e4 | 689 | |
b229cf92 | 690 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); |
1da177e4 LT |
691 | |
692 | if (!gpe_device) { | |
4be44fcd | 693 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
694 | } |
695 | ||
4be44fcd LB |
696 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
697 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
698 | return (status); |
699 | } | |
700 | ||
4be44fcd | 701 | node = acpi_ns_map_handle_to_node(gpe_device); |
1da177e4 LT |
702 | if (!node) { |
703 | status = AE_BAD_PARAMETER; | |
704 | goto unlock_and_exit; | |
705 | } | |
706 | ||
707 | /* Get the device_object attached to the node */ | |
708 | ||
4be44fcd LB |
709 | obj_desc = acpi_ns_get_attached_object(node); |
710 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
711 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
1da177e4 LT |
712 | } |
713 | ||
714 | /* Delete the GPE block (but not the device_object) */ | |
715 | ||
4be44fcd LB |
716 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); |
717 | if (ACPI_SUCCESS(status)) { | |
1da177e4 LT |
718 | obj_desc->device.gpe_block = NULL; |
719 | } | |
720 | ||
4be44fcd LB |
721 | unlock_and_exit: |
722 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
723 | return_ACPI_STATUS(status); | |
1da177e4 | 724 | } |
44f6c012 | 725 | |
8313524a | 726 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) |
e97d6bf1 BM |
727 | |
728 | /******************************************************************************* | |
729 | * | |
730 | * FUNCTION: acpi_get_gpe_device | |
731 | * | |
732 | * PARAMETERS: Index - System GPE index (0-current_gpe_count) | |
733 | * gpe_device - Where the parent GPE Device is returned | |
734 | * | |
735 | * RETURN: Status | |
736 | * | |
737 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL | |
738 | * gpe device indicates that the gpe number is contained in one of | |
739 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. | |
740 | * | |
741 | ******************************************************************************/ | |
742 | acpi_status | |
743 | acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) | |
744 | { | |
745 | struct acpi_gpe_device_info info; | |
746 | acpi_status status; | |
747 | ||
748 | ACPI_FUNCTION_TRACE(acpi_get_gpe_device); | |
749 | ||
750 | if (!gpe_device) { | |
751 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
752 | } | |
753 | ||
754 | if (index >= acpi_current_gpe_count) { | |
755 | return_ACPI_STATUS(AE_NOT_EXIST); | |
756 | } | |
757 | ||
758 | /* Setup and walk the GPE list */ | |
759 | ||
760 | info.index = index; | |
761 | info.status = AE_NOT_EXIST; | |
762 | info.gpe_device = NULL; | |
763 | info.next_block_base_index = 0; | |
764 | ||
765 | status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); | |
766 | if (ACPI_FAILURE(status)) { | |
767 | return_ACPI_STATUS(status); | |
768 | } | |
769 | ||
770 | *gpe_device = info.gpe_device; | |
771 | return_ACPI_STATUS(info.status); | |
772 | } | |
773 | ||
774 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) | |
775 | ||
776 | /******************************************************************************* | |
777 | * | |
778 | * FUNCTION: acpi_ev_get_gpe_device | |
779 | * | |
780 | * PARAMETERS: GPE_WALK_CALLBACK | |
781 | * | |
782 | * RETURN: Status | |
783 | * | |
784 | * DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE | |
785 | * block device. NULL if the GPE is one of the FADT-defined GPEs. | |
786 | * | |
787 | ******************************************************************************/ | |
788 | acpi_status | |
789 | acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info, | |
790 | struct acpi_gpe_block_info *gpe_block, void *context) | |
791 | { | |
792 | struct acpi_gpe_device_info *info = context; | |
793 | ||
794 | /* Increment Index by the number of GPEs in this block */ | |
795 | ||
796 | info->next_block_base_index += | |
797 | (gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH); | |
798 | ||
799 | if (info->index < info->next_block_base_index) { | |
800 | /* | |
801 | * The GPE index is within this block, get the node. Leave the node | |
802 | * NULL for the FADT-defined GPEs | |
803 | */ | |
804 | if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) { | |
805 | info->gpe_device = gpe_block->node; | |
806 | } | |
807 | ||
808 | info->status = AE_OK; | |
809 | return (AE_CTRL_END); | |
810 | } | |
811 | ||
812 | return (AE_OK); | |
813 | } | |
08ac07b8 BM |
814 | |
815 | /****************************************************************************** | |
816 | * | |
817 | * FUNCTION: acpi_disable_all_gpes | |
818 | * | |
819 | * PARAMETERS: None | |
820 | * | |
821 | * RETURN: Status | |
822 | * | |
823 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks | |
824 | * | |
825 | ******************************************************************************/ | |
826 | ||
827 | acpi_status acpi_disable_all_gpes(void) | |
828 | { | |
829 | acpi_status status; | |
830 | ||
831 | ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); | |
832 | ||
833 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
834 | if (ACPI_FAILURE(status)) { | |
835 | return_ACPI_STATUS(status); | |
836 | } | |
837 | ||
838 | status = acpi_hw_disable_all_gpes(); | |
839 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
840 | ||
841 | return_ACPI_STATUS(status); | |
842 | } | |
843 | ||
844 | /****************************************************************************** | |
845 | * | |
846 | * FUNCTION: acpi_enable_all_runtime_gpes | |
847 | * | |
848 | * PARAMETERS: None | |
849 | * | |
850 | * RETURN: Status | |
851 | * | |
852 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks | |
853 | * | |
854 | ******************************************************************************/ | |
855 | ||
856 | acpi_status acpi_enable_all_runtime_gpes(void) | |
857 | { | |
858 | acpi_status status; | |
859 | ||
860 | ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); | |
861 | ||
862 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
863 | if (ACPI_FAILURE(status)) { | |
864 | return_ACPI_STATUS(status); | |
865 | } | |
866 | ||
867 | status = acpi_hw_enable_all_runtime_gpes(); | |
868 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
869 | ||
870 | return_ACPI_STATUS(status); | |
871 | } |