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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acevents.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | ||
48 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 49 | ACPI_MODULE_NAME("evxfevnt") |
1da177e4 LT |
50 | |
51 | /******************************************************************************* | |
52 | * | |
53 | * FUNCTION: acpi_enable | |
54 | * | |
55 | * PARAMETERS: None | |
56 | * | |
57 | * RETURN: Status | |
58 | * | |
59 | * DESCRIPTION: Transfers the system into ACPI mode. | |
60 | * | |
61 | ******************************************************************************/ | |
4be44fcd | 62 | acpi_status acpi_enable(void) |
1da177e4 | 63 | { |
4be44fcd | 64 | acpi_status status = AE_OK; |
1da177e4 | 65 | |
b229cf92 | 66 | ACPI_FUNCTION_TRACE(acpi_enable); |
1da177e4 | 67 | |
4be44fcd | 68 | /* Make sure we have the FADT */ |
1da177e4 LT |
69 | |
70 | if (!acpi_gbl_FADT) { | |
b8e4d893 | 71 | ACPI_WARNING((AE_INFO, "No FADT information present!")); |
4be44fcd | 72 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
1da177e4 LT |
73 | } |
74 | ||
75 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { | |
4be44fcd LB |
76 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
77 | "System is already in ACPI mode\n")); | |
78 | } else { | |
1da177e4 LT |
79 | /* Transition to ACPI mode */ |
80 | ||
4be44fcd LB |
81 | status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
82 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
83 | ACPI_ERROR((AE_INFO, |
84 | "Could not transition to ACPI mode")); | |
4be44fcd | 85 | return_ACPI_STATUS(status); |
1da177e4 LT |
86 | } |
87 | ||
4be44fcd LB |
88 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
89 | "Transition to ACPI mode successful\n")); | |
1da177e4 LT |
90 | } |
91 | ||
4be44fcd | 92 | return_ACPI_STATUS(status); |
1da177e4 LT |
93 | } |
94 | ||
8313524a BM |
95 | ACPI_EXPORT_SYMBOL(acpi_enable) |
96 | ||
1da177e4 LT |
97 | /******************************************************************************* |
98 | * | |
99 | * FUNCTION: acpi_disable | |
100 | * | |
101 | * PARAMETERS: None | |
102 | * | |
103 | * RETURN: Status | |
104 | * | |
44f6c012 | 105 | * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. |
1da177e4 LT |
106 | * |
107 | ******************************************************************************/ | |
4be44fcd | 108 | acpi_status acpi_disable(void) |
1da177e4 | 109 | { |
4be44fcd | 110 | acpi_status status = AE_OK; |
1da177e4 | 111 | |
b229cf92 | 112 | ACPI_FUNCTION_TRACE(acpi_disable); |
1da177e4 LT |
113 | |
114 | if (!acpi_gbl_FADT) { | |
b8e4d893 | 115 | ACPI_WARNING((AE_INFO, "No FADT information present!")); |
4be44fcd | 116 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
1da177e4 LT |
117 | } |
118 | ||
119 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { | |
4be44fcd LB |
120 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
121 | "System is already in legacy (non-ACPI) mode\n")); | |
122 | } else { | |
1da177e4 LT |
123 | /* Transition to LEGACY mode */ |
124 | ||
4be44fcd | 125 | status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
1da177e4 | 126 | |
4be44fcd | 127 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
128 | ACPI_ERROR((AE_INFO, |
129 | "Could not exit ACPI mode to legacy mode")); | |
4be44fcd | 130 | return_ACPI_STATUS(status); |
1da177e4 LT |
131 | } |
132 | ||
4be44fcd | 133 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
1da177e4 LT |
134 | } |
135 | ||
4be44fcd | 136 | return_ACPI_STATUS(status); |
1da177e4 LT |
137 | } |
138 | ||
8313524a BM |
139 | ACPI_EXPORT_SYMBOL(acpi_disable) |
140 | ||
1da177e4 LT |
141 | /******************************************************************************* |
142 | * | |
143 | * FUNCTION: acpi_enable_event | |
144 | * | |
145 | * PARAMETERS: Event - The fixed eventto be enabled | |
146 | * Flags - Reserved | |
147 | * | |
148 | * RETURN: Status | |
149 | * | |
150 | * DESCRIPTION: Enable an ACPI event (fixed) | |
151 | * | |
152 | ******************************************************************************/ | |
4be44fcd | 153 | acpi_status acpi_enable_event(u32 event, u32 flags) |
1da177e4 | 154 | { |
4be44fcd LB |
155 | acpi_status status = AE_OK; |
156 | u32 value; | |
1da177e4 | 157 | |
b229cf92 | 158 | ACPI_FUNCTION_TRACE(acpi_enable_event); |
1da177e4 LT |
159 | |
160 | /* Decode the Fixed Event */ | |
161 | ||
162 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 163 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
164 | } |
165 | ||
166 | /* | |
167 | * Enable the requested fixed event (by writing a one to the | |
168 | * enable register bit) | |
169 | */ | |
4be44fcd LB |
170 | status = |
171 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
172 | enable_register_id, 1, ACPI_MTX_LOCK); | |
173 | if (ACPI_FAILURE(status)) { | |
174 | return_ACPI_STATUS(status); | |
1da177e4 LT |
175 | } |
176 | ||
177 | /* Make sure that the hardware responded */ | |
178 | ||
4be44fcd LB |
179 | status = |
180 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
181 | enable_register_id, &value, ACPI_MTX_LOCK); | |
182 | if (ACPI_FAILURE(status)) { | |
183 | return_ACPI_STATUS(status); | |
1da177e4 LT |
184 | } |
185 | ||
186 | if (value != 1) { | |
b8e4d893 BM |
187 | ACPI_ERROR((AE_INFO, |
188 | "Could not enable %s event", | |
189 | acpi_ut_get_event_name(event))); | |
4be44fcd | 190 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
191 | } |
192 | ||
4be44fcd | 193 | return_ACPI_STATUS(status); |
1da177e4 | 194 | } |
1da177e4 | 195 | |
8313524a | 196 | ACPI_EXPORT_SYMBOL(acpi_enable_event) |
1da177e4 LT |
197 | |
198 | /******************************************************************************* | |
199 | * | |
200 | * FUNCTION: acpi_set_gpe_type | |
201 | * | |
202 | * PARAMETERS: gpe_device - Parent GPE Device | |
203 | * gpe_number - GPE level within the GPE block | |
204 | * Type - New GPE type | |
205 | * | |
206 | * RETURN: Status | |
207 | * | |
44f6c012 | 208 | * DESCRIPTION: Set the type of an individual GPE |
1da177e4 LT |
209 | * |
210 | ******************************************************************************/ | |
4be44fcd | 211 | acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type) |
1da177e4 | 212 | { |
4be44fcd LB |
213 | acpi_status status = AE_OK; |
214 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 215 | |
b229cf92 | 216 | ACPI_FUNCTION_TRACE(acpi_set_gpe_type); |
1da177e4 LT |
217 | |
218 | /* Ensure that we have a valid GPE number */ | |
219 | ||
4be44fcd | 220 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
221 | if (!gpe_event_info) { |
222 | status = AE_BAD_PARAMETER; | |
223 | goto unlock_and_exit; | |
224 | } | |
225 | ||
226 | if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) { | |
4be44fcd | 227 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
228 | } |
229 | ||
230 | /* Set the new type (will disable GPE if currently enabled) */ | |
231 | ||
4be44fcd | 232 | status = acpi_ev_set_gpe_type(gpe_event_info, type); |
1da177e4 | 233 | |
4be44fcd LB |
234 | unlock_and_exit: |
235 | return_ACPI_STATUS(status); | |
1da177e4 | 236 | } |
1da177e4 | 237 | |
8313524a | 238 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_type) |
1da177e4 LT |
239 | |
240 | /******************************************************************************* | |
241 | * | |
242 | * FUNCTION: acpi_enable_gpe | |
243 | * | |
244 | * PARAMETERS: gpe_device - Parent GPE Device | |
245 | * gpe_number - GPE level within the GPE block | |
246 | * Flags - Just enable, or also wake enable? | |
247 | * Called from ISR or not | |
248 | * | |
249 | * RETURN: Status | |
250 | * | |
251 | * DESCRIPTION: Enable an ACPI event (general purpose) | |
252 | * | |
253 | ******************************************************************************/ | |
4be44fcd | 254 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
1da177e4 | 255 | { |
4be44fcd LB |
256 | acpi_status status = AE_OK; |
257 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 258 | |
b229cf92 | 259 | ACPI_FUNCTION_TRACE(acpi_enable_gpe); |
1da177e4 LT |
260 | |
261 | /* Use semaphore lock if not executing at interrupt level */ | |
262 | ||
263 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
264 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
265 | if (ACPI_FAILURE(status)) { | |
266 | return_ACPI_STATUS(status); | |
1da177e4 LT |
267 | } |
268 | } | |
269 | ||
270 | /* Ensure that we have a valid GPE number */ | |
271 | ||
4be44fcd | 272 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
273 | if (!gpe_event_info) { |
274 | status = AE_BAD_PARAMETER; | |
275 | goto unlock_and_exit; | |
276 | } | |
277 | ||
278 | /* Perform the enable */ | |
279 | ||
4be44fcd | 280 | status = acpi_ev_enable_gpe(gpe_event_info, TRUE); |
1da177e4 | 281 | |
4be44fcd | 282 | unlock_and_exit: |
1da177e4 | 283 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 284 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 285 | } |
4be44fcd | 286 | return_ACPI_STATUS(status); |
1da177e4 | 287 | } |
1da177e4 | 288 | |
8313524a | 289 | ACPI_EXPORT_SYMBOL(acpi_enable_gpe) |
1da177e4 LT |
290 | |
291 | /******************************************************************************* | |
292 | * | |
293 | * FUNCTION: acpi_disable_gpe | |
294 | * | |
295 | * PARAMETERS: gpe_device - Parent GPE Device | |
296 | * gpe_number - GPE level within the GPE block | |
297 | * Flags - Just disable, or also wake disable? | |
298 | * Called from ISR or not | |
299 | * | |
300 | * RETURN: Status | |
301 | * | |
302 | * DESCRIPTION: Disable an ACPI event (general purpose) | |
303 | * | |
304 | ******************************************************************************/ | |
4be44fcd | 305 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
1da177e4 | 306 | { |
4be44fcd LB |
307 | acpi_status status = AE_OK; |
308 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 309 | |
b229cf92 | 310 | ACPI_FUNCTION_TRACE(acpi_disable_gpe); |
1da177e4 LT |
311 | |
312 | /* Use semaphore lock if not executing at interrupt level */ | |
313 | ||
314 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
315 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
316 | if (ACPI_FAILURE(status)) { | |
317 | return_ACPI_STATUS(status); | |
1da177e4 LT |
318 | } |
319 | } | |
320 | ||
321 | /* Ensure that we have a valid GPE number */ | |
322 | ||
4be44fcd | 323 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
324 | if (!gpe_event_info) { |
325 | status = AE_BAD_PARAMETER; | |
326 | goto unlock_and_exit; | |
327 | } | |
328 | ||
4be44fcd | 329 | status = acpi_ev_disable_gpe(gpe_event_info); |
1da177e4 | 330 | |
4be44fcd | 331 | unlock_and_exit: |
1da177e4 | 332 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 333 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 334 | } |
4be44fcd | 335 | return_ACPI_STATUS(status); |
1da177e4 LT |
336 | } |
337 | ||
8313524a BM |
338 | ACPI_EXPORT_SYMBOL(acpi_disable_gpe) |
339 | ||
1da177e4 LT |
340 | /******************************************************************************* |
341 | * | |
342 | * FUNCTION: acpi_disable_event | |
343 | * | |
344 | * PARAMETERS: Event - The fixed eventto be enabled | |
345 | * Flags - Reserved | |
346 | * | |
347 | * RETURN: Status | |
348 | * | |
349 | * DESCRIPTION: Disable an ACPI event (fixed) | |
350 | * | |
351 | ******************************************************************************/ | |
4be44fcd | 352 | acpi_status acpi_disable_event(u32 event, u32 flags) |
1da177e4 | 353 | { |
4be44fcd LB |
354 | acpi_status status = AE_OK; |
355 | u32 value; | |
1da177e4 | 356 | |
b229cf92 | 357 | ACPI_FUNCTION_TRACE(acpi_disable_event); |
1da177e4 LT |
358 | |
359 | /* Decode the Fixed Event */ | |
360 | ||
361 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 362 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
363 | } |
364 | ||
365 | /* | |
366 | * Disable the requested fixed event (by writing a zero to the | |
367 | * enable register bit) | |
368 | */ | |
4be44fcd LB |
369 | status = |
370 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
371 | enable_register_id, 0, ACPI_MTX_LOCK); | |
372 | if (ACPI_FAILURE(status)) { | |
373 | return_ACPI_STATUS(status); | |
1da177e4 LT |
374 | } |
375 | ||
4be44fcd LB |
376 | status = |
377 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
378 | enable_register_id, &value, ACPI_MTX_LOCK); | |
379 | if (ACPI_FAILURE(status)) { | |
380 | return_ACPI_STATUS(status); | |
1da177e4 LT |
381 | } |
382 | ||
383 | if (value != 0) { | |
b8e4d893 BM |
384 | ACPI_ERROR((AE_INFO, |
385 | "Could not disable %s events", | |
386 | acpi_ut_get_event_name(event))); | |
4be44fcd | 387 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
388 | } |
389 | ||
4be44fcd | 390 | return_ACPI_STATUS(status); |
1da177e4 | 391 | } |
1da177e4 | 392 | |
8313524a | 393 | ACPI_EXPORT_SYMBOL(acpi_disable_event) |
1da177e4 LT |
394 | |
395 | /******************************************************************************* | |
396 | * | |
397 | * FUNCTION: acpi_clear_event | |
398 | * | |
399 | * PARAMETERS: Event - The fixed event to be cleared | |
400 | * | |
401 | * RETURN: Status | |
402 | * | |
403 | * DESCRIPTION: Clear an ACPI event (fixed) | |
404 | * | |
405 | ******************************************************************************/ | |
4be44fcd | 406 | acpi_status acpi_clear_event(u32 event) |
1da177e4 | 407 | { |
4be44fcd | 408 | acpi_status status = AE_OK; |
1da177e4 | 409 | |
b229cf92 | 410 | ACPI_FUNCTION_TRACE(acpi_clear_event); |
1da177e4 LT |
411 | |
412 | /* Decode the Fixed Event */ | |
413 | ||
414 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 415 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
416 | } |
417 | ||
418 | /* | |
419 | * Clear the requested fixed event (By writing a one to the | |
420 | * status register bit) | |
421 | */ | |
4be44fcd LB |
422 | status = |
423 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
424 | status_register_id, 1, ACPI_MTX_LOCK); | |
1da177e4 | 425 | |
4be44fcd | 426 | return_ACPI_STATUS(status); |
1da177e4 | 427 | } |
1da177e4 | 428 | |
8313524a | 429 | ACPI_EXPORT_SYMBOL(acpi_clear_event) |
1da177e4 LT |
430 | |
431 | /******************************************************************************* | |
432 | * | |
433 | * FUNCTION: acpi_clear_gpe | |
434 | * | |
435 | * PARAMETERS: gpe_device - Parent GPE Device | |
436 | * gpe_number - GPE level within the GPE block | |
437 | * Flags - Called from an ISR or not | |
438 | * | |
439 | * RETURN: Status | |
440 | * | |
441 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
442 | * | |
443 | ******************************************************************************/ | |
4be44fcd | 444 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
1da177e4 | 445 | { |
4be44fcd LB |
446 | acpi_status status = AE_OK; |
447 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 448 | |
b229cf92 | 449 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); |
1da177e4 LT |
450 | |
451 | /* Use semaphore lock if not executing at interrupt level */ | |
452 | ||
453 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
454 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
455 | if (ACPI_FAILURE(status)) { | |
456 | return_ACPI_STATUS(status); | |
1da177e4 LT |
457 | } |
458 | } | |
459 | ||
460 | /* Ensure that we have a valid GPE number */ | |
461 | ||
4be44fcd | 462 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
463 | if (!gpe_event_info) { |
464 | status = AE_BAD_PARAMETER; | |
465 | goto unlock_and_exit; | |
466 | } | |
467 | ||
4be44fcd | 468 | status = acpi_hw_clear_gpe(gpe_event_info); |
1da177e4 | 469 | |
4be44fcd | 470 | unlock_and_exit: |
1da177e4 | 471 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 472 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 473 | } |
4be44fcd | 474 | return_ACPI_STATUS(status); |
1da177e4 LT |
475 | } |
476 | ||
8313524a BM |
477 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) |
478 | ||
1da177e4 | 479 | #ifdef ACPI_FUTURE_USAGE |
1da177e4 LT |
480 | /******************************************************************************* |
481 | * | |
482 | * FUNCTION: acpi_get_event_status | |
483 | * | |
484 | * PARAMETERS: Event - The fixed event | |
44f6c012 | 485 | * event_status - Where the current status of the event will |
1da177e4 LT |
486 | * be returned |
487 | * | |
488 | * RETURN: Status | |
489 | * | |
490 | * DESCRIPTION: Obtains and returns the current status of the event | |
491 | * | |
492 | ******************************************************************************/ | |
4be44fcd | 493 | acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status) |
1da177e4 | 494 | { |
4be44fcd | 495 | acpi_status status = AE_OK; |
1da177e4 | 496 | |
b229cf92 | 497 | ACPI_FUNCTION_TRACE(acpi_get_event_status); |
1da177e4 LT |
498 | |
499 | if (!event_status) { | |
4be44fcd | 500 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
501 | } |
502 | ||
503 | /* Decode the Fixed Event */ | |
504 | ||
505 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 506 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
507 | } |
508 | ||
509 | /* Get the status of the requested fixed event */ | |
510 | ||
4be44fcd LB |
511 | status = |
512 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
513 | status_register_id, event_status, ACPI_MTX_LOCK); | |
1da177e4 | 514 | |
4be44fcd | 515 | return_ACPI_STATUS(status); |
1da177e4 LT |
516 | } |
517 | ||
8313524a BM |
518 | ACPI_EXPORT_SYMBOL(acpi_get_event_status) |
519 | ||
1da177e4 LT |
520 | /******************************************************************************* |
521 | * | |
522 | * FUNCTION: acpi_get_gpe_status | |
523 | * | |
524 | * PARAMETERS: gpe_device - Parent GPE Device | |
525 | * gpe_number - GPE level within the GPE block | |
526 | * Flags - Called from an ISR or not | |
44f6c012 | 527 | * event_status - Where the current status of the event will |
1da177e4 LT |
528 | * be returned |
529 | * | |
530 | * RETURN: Status | |
531 | * | |
532 | * DESCRIPTION: Get status of an event (general purpose) | |
533 | * | |
534 | ******************************************************************************/ | |
1da177e4 | 535 | acpi_status |
4be44fcd LB |
536 | acpi_get_gpe_status(acpi_handle gpe_device, |
537 | u32 gpe_number, u32 flags, acpi_event_status * event_status) | |
1da177e4 | 538 | { |
4be44fcd LB |
539 | acpi_status status = AE_OK; |
540 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 541 | |
b229cf92 | 542 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); |
1da177e4 LT |
543 | |
544 | /* Use semaphore lock if not executing at interrupt level */ | |
545 | ||
546 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
547 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
548 | if (ACPI_FAILURE(status)) { | |
549 | return_ACPI_STATUS(status); | |
1da177e4 LT |
550 | } |
551 | } | |
552 | ||
553 | /* Ensure that we have a valid GPE number */ | |
554 | ||
4be44fcd | 555 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
556 | if (!gpe_event_info) { |
557 | status = AE_BAD_PARAMETER; | |
558 | goto unlock_and_exit; | |
559 | } | |
560 | ||
561 | /* Obtain status on the requested GPE number */ | |
562 | ||
4be44fcd | 563 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); |
1da177e4 | 564 | |
4be44fcd | 565 | unlock_and_exit: |
1da177e4 | 566 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 567 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 568 | } |
4be44fcd | 569 | return_ACPI_STATUS(status); |
1da177e4 | 570 | } |
8313524a BM |
571 | |
572 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
4be44fcd | 573 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
574 | |
575 | /******************************************************************************* | |
576 | * | |
577 | * FUNCTION: acpi_install_gpe_block | |
578 | * | |
579 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
580 | * gpe_block_address - Address and space_iD | |
581 | * register_count - Number of GPE register pairs in the block | |
6f42ccf2 | 582 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
583 | * |
584 | * RETURN: Status | |
585 | * | |
586 | * DESCRIPTION: Create and Install a block of GPE registers | |
587 | * | |
588 | ******************************************************************************/ | |
1da177e4 | 589 | acpi_status |
4be44fcd LB |
590 | acpi_install_gpe_block(acpi_handle gpe_device, |
591 | struct acpi_generic_address *gpe_block_address, | |
592 | u32 register_count, u32 interrupt_number) | |
1da177e4 | 593 | { |
4be44fcd LB |
594 | acpi_status status; |
595 | union acpi_operand_object *obj_desc; | |
596 | struct acpi_namespace_node *node; | |
597 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 598 | |
b229cf92 | 599 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); |
1da177e4 | 600 | |
4be44fcd LB |
601 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { |
602 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
603 | } |
604 | ||
4be44fcd LB |
605 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
606 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
607 | return (status); |
608 | } | |
609 | ||
4be44fcd | 610 | node = acpi_ns_map_handle_to_node(gpe_device); |
1da177e4 LT |
611 | if (!node) { |
612 | status = AE_BAD_PARAMETER; | |
613 | goto unlock_and_exit; | |
614 | } | |
615 | ||
616 | /* | |
617 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
618 | * is always zero | |
619 | */ | |
4be44fcd LB |
620 | status = |
621 | acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, | |
622 | interrupt_number, &gpe_block); | |
623 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
624 | goto unlock_and_exit; |
625 | } | |
626 | ||
96db255c BM |
627 | /* Run the _PRW methods and enable the GPEs */ |
628 | ||
629 | status = acpi_ev_initialize_gpe_block(node, gpe_block); | |
630 | if (ACPI_FAILURE(status)) { | |
631 | goto unlock_and_exit; | |
632 | } | |
633 | ||
1da177e4 LT |
634 | /* Get the device_object attached to the node */ |
635 | ||
4be44fcd | 636 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 637 | if (!obj_desc) { |
52fc0b02 | 638 | |
1da177e4 LT |
639 | /* No object, create a new one */ |
640 | ||
4be44fcd | 641 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); |
1da177e4 LT |
642 | if (!obj_desc) { |
643 | status = AE_NO_MEMORY; | |
644 | goto unlock_and_exit; | |
645 | } | |
646 | ||
4be44fcd LB |
647 | status = |
648 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
1da177e4 LT |
649 | |
650 | /* Remove local reference to the object */ | |
651 | ||
4be44fcd | 652 | acpi_ut_remove_reference(obj_desc); |
1da177e4 | 653 | |
4be44fcd | 654 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
655 | goto unlock_and_exit; |
656 | } | |
657 | } | |
658 | ||
659 | /* Install the GPE block in the device_object */ | |
660 | ||
661 | obj_desc->device.gpe_block = gpe_block; | |
662 | ||
4be44fcd LB |
663 | unlock_and_exit: |
664 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
665 | return_ACPI_STATUS(status); | |
1da177e4 | 666 | } |
1da177e4 | 667 | |
8313524a | 668 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) |
1da177e4 LT |
669 | |
670 | /******************************************************************************* | |
671 | * | |
672 | * FUNCTION: acpi_remove_gpe_block | |
673 | * | |
674 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
675 | * | |
676 | * RETURN: Status | |
677 | * | |
678 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
679 | * | |
680 | ******************************************************************************/ | |
4be44fcd | 681 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) |
1da177e4 | 682 | { |
4be44fcd LB |
683 | union acpi_operand_object *obj_desc; |
684 | acpi_status status; | |
685 | struct acpi_namespace_node *node; | |
1da177e4 | 686 | |
b229cf92 | 687 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); |
1da177e4 LT |
688 | |
689 | if (!gpe_device) { | |
4be44fcd | 690 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
691 | } |
692 | ||
4be44fcd LB |
693 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
694 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
695 | return (status); |
696 | } | |
697 | ||
4be44fcd | 698 | node = acpi_ns_map_handle_to_node(gpe_device); |
1da177e4 LT |
699 | if (!node) { |
700 | status = AE_BAD_PARAMETER; | |
701 | goto unlock_and_exit; | |
702 | } | |
703 | ||
704 | /* Get the device_object attached to the node */ | |
705 | ||
4be44fcd LB |
706 | obj_desc = acpi_ns_get_attached_object(node); |
707 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
708 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
1da177e4 LT |
709 | } |
710 | ||
711 | /* Delete the GPE block (but not the device_object) */ | |
712 | ||
4be44fcd LB |
713 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); |
714 | if (ACPI_SUCCESS(status)) { | |
1da177e4 LT |
715 | obj_desc->device.gpe_block = NULL; |
716 | } | |
717 | ||
4be44fcd LB |
718 | unlock_and_exit: |
719 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
720 | return_ACPI_STATUS(status); | |
1da177e4 | 721 | } |
44f6c012 | 722 | |
8313524a | 723 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) |