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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 | ||
44 | #include <linux/module.h> | |
45 | ||
46 | #include <acpi/acpi.h> | |
47 | #include <acpi/acevents.h> | |
48 | #include <acpi/acnamesp.h> | |
49 | ||
50 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 51 | ACPI_MODULE_NAME("evxfevnt") |
1da177e4 LT |
52 | |
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_enable | |
56 | * | |
57 | * PARAMETERS: None | |
58 | * | |
59 | * RETURN: Status | |
60 | * | |
61 | * DESCRIPTION: Transfers the system into ACPI mode. | |
62 | * | |
63 | ******************************************************************************/ | |
4be44fcd | 64 | acpi_status acpi_enable(void) |
1da177e4 | 65 | { |
4be44fcd | 66 | acpi_status status = AE_OK; |
1da177e4 | 67 | |
4be44fcd | 68 | ACPI_FUNCTION_TRACE("acpi_enable"); |
1da177e4 | 69 | |
4be44fcd | 70 | /* Make sure we have the FADT */ |
1da177e4 LT |
71 | |
72 | if (!acpi_gbl_FADT) { | |
b8e4d893 | 73 | ACPI_WARNING((AE_INFO, "No FADT information present!")); |
4be44fcd | 74 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
1da177e4 LT |
75 | } |
76 | ||
77 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { | |
4be44fcd LB |
78 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
79 | "System is already in ACPI mode\n")); | |
80 | } else { | |
1da177e4 LT |
81 | /* Transition to ACPI mode */ |
82 | ||
4be44fcd LB |
83 | status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
84 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
85 | ACPI_ERROR((AE_INFO, |
86 | "Could not transition to ACPI mode")); | |
4be44fcd | 87 | return_ACPI_STATUS(status); |
1da177e4 LT |
88 | } |
89 | ||
4be44fcd LB |
90 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
91 | "Transition to ACPI mode successful\n")); | |
1da177e4 LT |
92 | } |
93 | ||
4be44fcd | 94 | return_ACPI_STATUS(status); |
1da177e4 LT |
95 | } |
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 | ******************************************************************************/ | |
108 | ||
4be44fcd | 109 | acpi_status acpi_disable(void) |
1da177e4 | 110 | { |
4be44fcd | 111 | acpi_status status = AE_OK; |
1da177e4 | 112 | |
4be44fcd | 113 | ACPI_FUNCTION_TRACE("acpi_disable"); |
1da177e4 LT |
114 | |
115 | if (!acpi_gbl_FADT) { | |
b8e4d893 | 116 | ACPI_WARNING((AE_INFO, "No FADT information present!")); |
4be44fcd | 117 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
1da177e4 LT |
118 | } |
119 | ||
120 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { | |
4be44fcd LB |
121 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
122 | "System is already in legacy (non-ACPI) mode\n")); | |
123 | } else { | |
1da177e4 LT |
124 | /* Transition to LEGACY mode */ |
125 | ||
4be44fcd | 126 | status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
1da177e4 | 127 | |
4be44fcd | 128 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
129 | ACPI_ERROR((AE_INFO, |
130 | "Could not exit ACPI mode to legacy mode")); | |
4be44fcd | 131 | return_ACPI_STATUS(status); |
1da177e4 LT |
132 | } |
133 | ||
4be44fcd | 134 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
1da177e4 LT |
135 | } |
136 | ||
4be44fcd | 137 | return_ACPI_STATUS(status); |
1da177e4 LT |
138 | } |
139 | ||
1da177e4 LT |
140 | /******************************************************************************* |
141 | * | |
142 | * FUNCTION: acpi_enable_event | |
143 | * | |
144 | * PARAMETERS: Event - The fixed eventto be enabled | |
145 | * Flags - Reserved | |
146 | * | |
147 | * RETURN: Status | |
148 | * | |
149 | * DESCRIPTION: Enable an ACPI event (fixed) | |
150 | * | |
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 | |
4be44fcd | 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 | |
4be44fcd | 196 | 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 | ******************************************************************************/ | |
211 | ||
4be44fcd | 212 | acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type) |
1da177e4 | 213 | { |
4be44fcd LB |
214 | acpi_status status = AE_OK; |
215 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 216 | |
4be44fcd | 217 | ACPI_FUNCTION_TRACE("acpi_set_gpe_type"); |
1da177e4 LT |
218 | |
219 | /* Ensure that we have a valid GPE number */ | |
220 | ||
4be44fcd | 221 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
222 | if (!gpe_event_info) { |
223 | status = AE_BAD_PARAMETER; | |
224 | goto unlock_and_exit; | |
225 | } | |
226 | ||
227 | if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) { | |
4be44fcd | 228 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
229 | } |
230 | ||
231 | /* Set the new type (will disable GPE if currently enabled) */ | |
232 | ||
4be44fcd | 233 | status = acpi_ev_set_gpe_type(gpe_event_info, type); |
1da177e4 | 234 | |
4be44fcd LB |
235 | unlock_and_exit: |
236 | return_ACPI_STATUS(status); | |
1da177e4 | 237 | } |
1da177e4 | 238 | |
4be44fcd | 239 | EXPORT_SYMBOL(acpi_set_gpe_type); |
1da177e4 LT |
240 | |
241 | /******************************************************************************* | |
242 | * | |
243 | * FUNCTION: acpi_enable_gpe | |
244 | * | |
245 | * PARAMETERS: gpe_device - Parent GPE Device | |
246 | * gpe_number - GPE level within the GPE block | |
247 | * Flags - Just enable, or also wake enable? | |
248 | * Called from ISR or not | |
249 | * | |
250 | * RETURN: Status | |
251 | * | |
252 | * DESCRIPTION: Enable an ACPI event (general purpose) | |
253 | * | |
254 | ******************************************************************************/ | |
255 | ||
4be44fcd | 256 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
1da177e4 | 257 | { |
4be44fcd LB |
258 | acpi_status status = AE_OK; |
259 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 260 | |
4be44fcd | 261 | ACPI_FUNCTION_TRACE("acpi_enable_gpe"); |
1da177e4 LT |
262 | |
263 | /* Use semaphore lock if not executing at interrupt level */ | |
264 | ||
265 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
266 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
267 | if (ACPI_FAILURE(status)) { | |
268 | return_ACPI_STATUS(status); | |
1da177e4 LT |
269 | } |
270 | } | |
271 | ||
272 | /* Ensure that we have a valid GPE number */ | |
273 | ||
4be44fcd | 274 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
275 | if (!gpe_event_info) { |
276 | status = AE_BAD_PARAMETER; | |
277 | goto unlock_and_exit; | |
278 | } | |
279 | ||
280 | /* Perform the enable */ | |
281 | ||
4be44fcd | 282 | status = acpi_ev_enable_gpe(gpe_event_info, TRUE); |
1da177e4 | 283 | |
4be44fcd | 284 | unlock_and_exit: |
1da177e4 | 285 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 286 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 287 | } |
4be44fcd | 288 | return_ACPI_STATUS(status); |
1da177e4 | 289 | } |
1da177e4 | 290 | |
4be44fcd | 291 | EXPORT_SYMBOL(acpi_enable_gpe); |
1da177e4 LT |
292 | |
293 | /******************************************************************************* | |
294 | * | |
295 | * FUNCTION: acpi_disable_gpe | |
296 | * | |
297 | * PARAMETERS: gpe_device - Parent GPE Device | |
298 | * gpe_number - GPE level within the GPE block | |
299 | * Flags - Just disable, or also wake disable? | |
300 | * Called from ISR or not | |
301 | * | |
302 | * RETURN: Status | |
303 | * | |
304 | * DESCRIPTION: Disable an ACPI event (general purpose) | |
305 | * | |
306 | ******************************************************************************/ | |
307 | ||
4be44fcd | 308 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
1da177e4 | 309 | { |
4be44fcd LB |
310 | acpi_status status = AE_OK; |
311 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 312 | |
4be44fcd | 313 | ACPI_FUNCTION_TRACE("acpi_disable_gpe"); |
1da177e4 LT |
314 | |
315 | /* Use semaphore lock if not executing at interrupt level */ | |
316 | ||
317 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
318 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
319 | if (ACPI_FAILURE(status)) { | |
320 | return_ACPI_STATUS(status); | |
1da177e4 LT |
321 | } |
322 | } | |
323 | ||
324 | /* Ensure that we have a valid GPE number */ | |
325 | ||
4be44fcd | 326 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
327 | if (!gpe_event_info) { |
328 | status = AE_BAD_PARAMETER; | |
329 | goto unlock_and_exit; | |
330 | } | |
331 | ||
4be44fcd | 332 | status = acpi_ev_disable_gpe(gpe_event_info); |
1da177e4 | 333 | |
4be44fcd | 334 | unlock_and_exit: |
1da177e4 | 335 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 336 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 337 | } |
4be44fcd | 338 | return_ACPI_STATUS(status); |
1da177e4 LT |
339 | } |
340 | ||
1da177e4 LT |
341 | /******************************************************************************* |
342 | * | |
343 | * FUNCTION: acpi_disable_event | |
344 | * | |
345 | * PARAMETERS: Event - The fixed eventto be enabled | |
346 | * Flags - Reserved | |
347 | * | |
348 | * RETURN: Status | |
349 | * | |
350 | * DESCRIPTION: Disable an ACPI event (fixed) | |
351 | * | |
352 | ******************************************************************************/ | |
353 | ||
4be44fcd | 354 | acpi_status acpi_disable_event(u32 event, u32 flags) |
1da177e4 | 355 | { |
4be44fcd LB |
356 | acpi_status status = AE_OK; |
357 | u32 value; | |
1da177e4 | 358 | |
4be44fcd | 359 | ACPI_FUNCTION_TRACE("acpi_disable_event"); |
1da177e4 LT |
360 | |
361 | /* Decode the Fixed Event */ | |
362 | ||
363 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 364 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
365 | } |
366 | ||
367 | /* | |
368 | * Disable the requested fixed event (by writing a zero to the | |
369 | * enable register bit) | |
370 | */ | |
4be44fcd LB |
371 | status = |
372 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
373 | enable_register_id, 0, ACPI_MTX_LOCK); | |
374 | if (ACPI_FAILURE(status)) { | |
375 | return_ACPI_STATUS(status); | |
1da177e4 LT |
376 | } |
377 | ||
4be44fcd LB |
378 | status = |
379 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
380 | enable_register_id, &value, ACPI_MTX_LOCK); | |
381 | if (ACPI_FAILURE(status)) { | |
382 | return_ACPI_STATUS(status); | |
1da177e4 LT |
383 | } |
384 | ||
385 | if (value != 0) { | |
b8e4d893 BM |
386 | ACPI_ERROR((AE_INFO, |
387 | "Could not disable %s events", | |
388 | acpi_ut_get_event_name(event))); | |
4be44fcd | 389 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
390 | } |
391 | ||
4be44fcd | 392 | return_ACPI_STATUS(status); |
1da177e4 | 393 | } |
1da177e4 | 394 | |
4be44fcd | 395 | EXPORT_SYMBOL(acpi_disable_event); |
1da177e4 LT |
396 | |
397 | /******************************************************************************* | |
398 | * | |
399 | * FUNCTION: acpi_clear_event | |
400 | * | |
401 | * PARAMETERS: Event - The fixed event to be cleared | |
402 | * | |
403 | * RETURN: Status | |
404 | * | |
405 | * DESCRIPTION: Clear an ACPI event (fixed) | |
406 | * | |
407 | ******************************************************************************/ | |
408 | ||
4be44fcd | 409 | acpi_status acpi_clear_event(u32 event) |
1da177e4 | 410 | { |
4be44fcd | 411 | acpi_status status = AE_OK; |
1da177e4 | 412 | |
4be44fcd | 413 | ACPI_FUNCTION_TRACE("acpi_clear_event"); |
1da177e4 LT |
414 | |
415 | /* Decode the Fixed Event */ | |
416 | ||
417 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 418 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
419 | } |
420 | ||
421 | /* | |
422 | * Clear the requested fixed event (By writing a one to the | |
423 | * status register bit) | |
424 | */ | |
4be44fcd LB |
425 | status = |
426 | acpi_set_register(acpi_gbl_fixed_event_info[event]. | |
427 | status_register_id, 1, ACPI_MTX_LOCK); | |
1da177e4 | 428 | |
4be44fcd | 429 | return_ACPI_STATUS(status); |
1da177e4 | 430 | } |
1da177e4 | 431 | |
4be44fcd | 432 | EXPORT_SYMBOL(acpi_clear_event); |
1da177e4 LT |
433 | |
434 | /******************************************************************************* | |
435 | * | |
436 | * FUNCTION: acpi_clear_gpe | |
437 | * | |
438 | * PARAMETERS: gpe_device - Parent GPE Device | |
439 | * gpe_number - GPE level within the GPE block | |
440 | * Flags - Called from an ISR or not | |
441 | * | |
442 | * RETURN: Status | |
443 | * | |
444 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
445 | * | |
446 | ******************************************************************************/ | |
447 | ||
4be44fcd | 448 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
1da177e4 | 449 | { |
4be44fcd LB |
450 | acpi_status status = AE_OK; |
451 | struct acpi_gpe_event_info *gpe_event_info; | |
1da177e4 | 452 | |
4be44fcd | 453 | ACPI_FUNCTION_TRACE("acpi_clear_gpe"); |
1da177e4 LT |
454 | |
455 | /* Use semaphore lock if not executing at interrupt level */ | |
456 | ||
457 | if (flags & ACPI_NOT_ISR) { | |
4be44fcd LB |
458 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
459 | if (ACPI_FAILURE(status)) { | |
460 | return_ACPI_STATUS(status); | |
1da177e4 LT |
461 | } |
462 | } | |
463 | ||
464 | /* Ensure that we have a valid GPE number */ | |
465 | ||
4be44fcd | 466 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
467 | if (!gpe_event_info) { |
468 | status = AE_BAD_PARAMETER; | |
469 | goto unlock_and_exit; | |
470 | } | |
471 | ||
4be44fcd | 472 | status = acpi_hw_clear_gpe(gpe_event_info); |
1da177e4 | 473 | |
4be44fcd | 474 | unlock_and_exit: |
1da177e4 | 475 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 476 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 477 | } |
4be44fcd | 478 | return_ACPI_STATUS(status); |
1da177e4 LT |
479 | } |
480 | ||
1da177e4 | 481 | #ifdef ACPI_FUTURE_USAGE |
1da177e4 LT |
482 | /******************************************************************************* |
483 | * | |
484 | * FUNCTION: acpi_get_event_status | |
485 | * | |
486 | * PARAMETERS: Event - The fixed event | |
44f6c012 | 487 | * event_status - Where the current status of the event will |
1da177e4 LT |
488 | * be returned |
489 | * | |
490 | * RETURN: Status | |
491 | * | |
492 | * DESCRIPTION: Obtains and returns the current status of the event | |
493 | * | |
494 | ******************************************************************************/ | |
495 | ||
4be44fcd | 496 | acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status) |
1da177e4 | 497 | { |
4be44fcd | 498 | acpi_status status = AE_OK; |
1da177e4 | 499 | |
4be44fcd | 500 | ACPI_FUNCTION_TRACE("acpi_get_event_status"); |
1da177e4 LT |
501 | |
502 | if (!event_status) { | |
4be44fcd | 503 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
504 | } |
505 | ||
506 | /* Decode the Fixed Event */ | |
507 | ||
508 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 509 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
510 | } |
511 | ||
512 | /* Get the status of the requested fixed event */ | |
513 | ||
4be44fcd LB |
514 | status = |
515 | acpi_get_register(acpi_gbl_fixed_event_info[event]. | |
516 | status_register_id, event_status, ACPI_MTX_LOCK); | |
1da177e4 | 517 | |
4be44fcd | 518 | return_ACPI_STATUS(status); |
1da177e4 LT |
519 | } |
520 | ||
1da177e4 LT |
521 | /******************************************************************************* |
522 | * | |
523 | * FUNCTION: acpi_get_gpe_status | |
524 | * | |
525 | * PARAMETERS: gpe_device - Parent GPE Device | |
526 | * gpe_number - GPE level within the GPE block | |
527 | * Flags - Called from an ISR or not | |
44f6c012 | 528 | * event_status - Where the current status of the event will |
1da177e4 LT |
529 | * be returned |
530 | * | |
531 | * RETURN: Status | |
532 | * | |
533 | * DESCRIPTION: Get status of an event (general purpose) | |
534 | * | |
535 | ******************************************************************************/ | |
536 | ||
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 | |
4be44fcd | 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 | |
4be44fcd | 567 | unlock_and_exit: |
1da177e4 | 568 | if (flags & ACPI_NOT_ISR) { |
4be44fcd | 569 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 570 | } |
4be44fcd | 571 | return_ACPI_STATUS(status); |
1da177e4 | 572 | } |
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 | ******************************************************************************/ | |
589 | ||
590 | acpi_status | |
4be44fcd LB |
591 | acpi_install_gpe_block(acpi_handle gpe_device, |
592 | struct acpi_generic_address *gpe_block_address, | |
593 | u32 register_count, u32 interrupt_number) | |
1da177e4 | 594 | { |
4be44fcd LB |
595 | acpi_status status; |
596 | union acpi_operand_object *obj_desc; | |
597 | struct acpi_namespace_node *node; | |
598 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 599 | |
4be44fcd | 600 | ACPI_FUNCTION_TRACE("acpi_install_gpe_block"); |
1da177e4 | 601 | |
4be44fcd LB |
602 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { |
603 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
604 | } |
605 | ||
4be44fcd LB |
606 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
607 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
608 | return (status); |
609 | } | |
610 | ||
4be44fcd | 611 | node = acpi_ns_map_handle_to_node(gpe_device); |
1da177e4 LT |
612 | if (!node) { |
613 | status = AE_BAD_PARAMETER; | |
614 | goto unlock_and_exit; | |
615 | } | |
616 | ||
617 | /* | |
618 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
619 | * is always zero | |
620 | */ | |
4be44fcd LB |
621 | status = |
622 | acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, | |
623 | interrupt_number, &gpe_block); | |
624 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
625 | goto unlock_and_exit; |
626 | } | |
627 | ||
96db255c BM |
628 | /* Run the _PRW methods and enable the GPEs */ |
629 | ||
630 | status = acpi_ev_initialize_gpe_block(node, gpe_block); | |
631 | if (ACPI_FAILURE(status)) { | |
632 | goto unlock_and_exit; | |
633 | } | |
634 | ||
1da177e4 LT |
635 | /* Get the device_object attached to the node */ |
636 | ||
4be44fcd | 637 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 638 | if (!obj_desc) { |
52fc0b02 | 639 | |
1da177e4 LT |
640 | /* No object, create a new one */ |
641 | ||
4be44fcd | 642 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); |
1da177e4 LT |
643 | if (!obj_desc) { |
644 | status = AE_NO_MEMORY; | |
645 | goto unlock_and_exit; | |
646 | } | |
647 | ||
4be44fcd LB |
648 | status = |
649 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
1da177e4 LT |
650 | |
651 | /* Remove local reference to the object */ | |
652 | ||
4be44fcd | 653 | acpi_ut_remove_reference(obj_desc); |
1da177e4 | 654 | |
4be44fcd | 655 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
656 | goto unlock_and_exit; |
657 | } | |
658 | } | |
659 | ||
660 | /* Install the GPE block in the device_object */ | |
661 | ||
662 | obj_desc->device.gpe_block = gpe_block; | |
663 | ||
4be44fcd LB |
664 | unlock_and_exit: |
665 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
666 | return_ACPI_STATUS(status); | |
1da177e4 | 667 | } |
1da177e4 | 668 | |
4be44fcd | 669 | EXPORT_SYMBOL(acpi_install_gpe_block); |
1da177e4 LT |
670 | |
671 | /******************************************************************************* | |
672 | * | |
673 | * FUNCTION: acpi_remove_gpe_block | |
674 | * | |
675 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
676 | * | |
677 | * RETURN: Status | |
678 | * | |
679 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
680 | * | |
681 | ******************************************************************************/ | |
682 | ||
4be44fcd | 683 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) |
1da177e4 | 684 | { |
4be44fcd LB |
685 | union acpi_operand_object *obj_desc; |
686 | acpi_status status; | |
687 | struct acpi_namespace_node *node; | |
1da177e4 | 688 | |
4be44fcd | 689 | ACPI_FUNCTION_TRACE("acpi_remove_gpe_block"); |
1da177e4 LT |
690 | |
691 | if (!gpe_device) { | |
4be44fcd | 692 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
693 | } |
694 | ||
4be44fcd LB |
695 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
696 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
697 | return (status); |
698 | } | |
699 | ||
4be44fcd | 700 | node = acpi_ns_map_handle_to_node(gpe_device); |
1da177e4 LT |
701 | if (!node) { |
702 | status = AE_BAD_PARAMETER; | |
703 | goto unlock_and_exit; | |
704 | } | |
705 | ||
706 | /* Get the device_object attached to the node */ | |
707 | ||
4be44fcd LB |
708 | obj_desc = acpi_ns_get_attached_object(node); |
709 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
710 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
1da177e4 LT |
711 | } |
712 | ||
713 | /* Delete the GPE block (but not the device_object) */ | |
714 | ||
4be44fcd LB |
715 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); |
716 | if (ACPI_SUCCESS(status)) { | |
1da177e4 LT |
717 | obj_desc->device.gpe_block = NULL; |
718 | } | |
719 | ||
4be44fcd LB |
720 | unlock_and_exit: |
721 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
722 | return_ACPI_STATUS(status); | |
1da177e4 | 723 | } |
44f6c012 | 724 | |
1da177e4 | 725 | EXPORT_SYMBOL(acpi_remove_gpe_block); |