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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Module Name: hwgpe - Low level GPE enable/disable/clear functions | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
75a44ce0 | 9 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
45 | #include <acpi/acpi.h> | |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acevents.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 50 | ACPI_MODULE_NAME("hwgpe") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | static acpi_status |
4be44fcd | 54 | acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
55 | struct acpi_gpe_block_info *gpe_block, |
56 | void *context); | |
1da177e4 | 57 | |
e38e8a07 BM |
58 | /****************************************************************************** |
59 | * | |
60 | * FUNCTION: acpi_hw_low_disable_gpe | |
61 | * | |
62 | * PARAMETERS: gpe_event_info - Info block for the GPE to be disabled | |
63 | * | |
64 | * RETURN: Status | |
65 | * | |
66 | * DESCRIPTION: Disable a single GPE in the enable register. | |
67 | * | |
68 | ******************************************************************************/ | |
69 | ||
70 | acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info) | |
71 | { | |
72 | struct acpi_gpe_register_info *gpe_register_info; | |
73 | acpi_status status; | |
74 | u32 enable_mask; | |
75 | ||
76 | /* Get the info block for the entire GPE register */ | |
77 | ||
78 | gpe_register_info = gpe_event_info->register_info; | |
79 | if (!gpe_register_info) { | |
80 | return (AE_NOT_EXIST); | |
81 | } | |
82 | ||
83 | /* Get current value of the enable register that contains this GPE */ | |
84 | ||
c6b5774c | 85 | status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address); |
e38e8a07 BM |
86 | if (ACPI_FAILURE(status)) { |
87 | return (status); | |
88 | } | |
89 | ||
90 | /* Clear just the bit that corresponds to this GPE */ | |
91 | ||
d4913dc6 BM |
92 | ACPI_CLEAR_BIT(enable_mask, ((u32)1 << |
93 | (gpe_event_info->gpe_number - | |
94 | gpe_register_info->base_gpe_number))); | |
e38e8a07 BM |
95 | |
96 | /* Write the updated enable mask */ | |
97 | ||
c6b5774c | 98 | status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address); |
e38e8a07 BM |
99 | return (status); |
100 | } | |
101 | ||
1da177e4 LT |
102 | /****************************************************************************** |
103 | * | |
104 | * FUNCTION: acpi_hw_write_gpe_enable_reg | |
105 | * | |
106 | * PARAMETERS: gpe_event_info - Info block for the GPE to be enabled | |
107 | * | |
108 | * RETURN: Status | |
109 | * | |
110 | * DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must | |
111 | * already be cleared or set in the parent register | |
112 | * enable_for_run mask. | |
113 | * | |
114 | ******************************************************************************/ | |
115 | ||
116 | acpi_status | |
e38e8a07 | 117 | acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info) |
1da177e4 | 118 | { |
4be44fcd LB |
119 | struct acpi_gpe_register_info *gpe_register_info; |
120 | acpi_status status; | |
1da177e4 | 121 | |
4be44fcd | 122 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
123 | |
124 | /* Get the info block for the entire GPE register */ | |
125 | ||
126 | gpe_register_info = gpe_event_info->register_info; | |
127 | if (!gpe_register_info) { | |
128 | return (AE_NOT_EXIST); | |
129 | } | |
130 | ||
131 | /* Write the entire GPE (runtime) enable register */ | |
132 | ||
c6b5774c BM |
133 | status = acpi_hw_write(gpe_register_info->enable_for_run, |
134 | &gpe_register_info->enable_address); | |
1da177e4 LT |
135 | |
136 | return (status); | |
137 | } | |
138 | ||
1da177e4 LT |
139 | /****************************************************************************** |
140 | * | |
141 | * FUNCTION: acpi_hw_clear_gpe | |
142 | * | |
143 | * PARAMETERS: gpe_event_info - Info block for the GPE to be cleared | |
144 | * | |
145 | * RETURN: Status | |
146 | * | |
147 | * DESCRIPTION: Clear the status bit for a single GPE. | |
148 | * | |
149 | ******************************************************************************/ | |
150 | ||
4be44fcd | 151 | acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info) |
1da177e4 | 152 | { |
4be44fcd | 153 | acpi_status status; |
69874165 | 154 | u8 register_bit; |
1da177e4 | 155 | |
4be44fcd | 156 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 157 | |
d4913dc6 BM |
158 | register_bit = (u8)(1 << |
159 | (gpe_event_info->gpe_number - | |
160 | gpe_event_info->register_info->base_gpe_number)); | |
69874165 | 161 | |
1da177e4 LT |
162 | /* |
163 | * Write a one to the appropriate bit in the status register to | |
164 | * clear this GPE. | |
165 | */ | |
c6b5774c BM |
166 | status = acpi_hw_write(register_bit, |
167 | &gpe_event_info->register_info->status_address); | |
1da177e4 LT |
168 | |
169 | return (status); | |
170 | } | |
171 | ||
1da177e4 LT |
172 | /****************************************************************************** |
173 | * | |
174 | * FUNCTION: acpi_hw_get_gpe_status | |
175 | * | |
176 | * PARAMETERS: gpe_event_info - Info block for the GPE to queried | |
177 | * event_status - Where the GPE status is returned | |
178 | * | |
179 | * RETURN: Status | |
180 | * | |
181 | * DESCRIPTION: Return the status of a single GPE. | |
182 | * | |
183 | ******************************************************************************/ | |
44f6c012 | 184 | |
1da177e4 | 185 | acpi_status |
4be44fcd LB |
186 | acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info, |
187 | acpi_event_status * event_status) | |
1da177e4 | 188 | { |
4be44fcd LB |
189 | u32 in_byte; |
190 | u8 register_bit; | |
191 | struct acpi_gpe_register_info *gpe_register_info; | |
192 | acpi_status status; | |
193 | acpi_event_status local_event_status = 0; | |
1da177e4 | 194 | |
4be44fcd | 195 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
196 | |
197 | if (!event_status) { | |
198 | return (AE_BAD_PARAMETER); | |
199 | } | |
200 | ||
201 | /* Get the info block for the entire GPE register */ | |
202 | ||
203 | gpe_register_info = gpe_event_info->register_info; | |
204 | ||
205 | /* Get the register bitmask for this GPE */ | |
206 | ||
d4913dc6 BM |
207 | register_bit = (u8)(1 << |
208 | (gpe_event_info->gpe_number - | |
209 | gpe_event_info->register_info->base_gpe_number)); | |
1da177e4 LT |
210 | |
211 | /* GPE currently enabled? (enabled for runtime?) */ | |
212 | ||
213 | if (register_bit & gpe_register_info->enable_for_run) { | |
214 | local_event_status |= ACPI_EVENT_FLAG_ENABLED; | |
215 | } | |
216 | ||
217 | /* GPE enabled for wake? */ | |
218 | ||
219 | if (register_bit & gpe_register_info->enable_for_wake) { | |
220 | local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED; | |
221 | } | |
222 | ||
223 | /* GPE currently active (status bit == 1)? */ | |
224 | ||
c6b5774c | 225 | status = acpi_hw_read(&in_byte, &gpe_register_info->status_address); |
4be44fcd | 226 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
227 | goto unlock_and_exit; |
228 | } | |
229 | ||
230 | if (register_bit & in_byte) { | |
231 | local_event_status |= ACPI_EVENT_FLAG_SET; | |
232 | } | |
233 | ||
234 | /* Set return value */ | |
235 | ||
236 | (*event_status) = local_event_status; | |
237 | ||
4be44fcd | 238 | unlock_and_exit: |
1da177e4 LT |
239 | return (status); |
240 | } | |
1da177e4 LT |
241 | |
242 | /****************************************************************************** | |
243 | * | |
244 | * FUNCTION: acpi_hw_disable_gpe_block | |
245 | * | |
246 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
247 | * gpe_block - Gpe Block info | |
248 | * | |
249 | * RETURN: Status | |
250 | * | |
44f6c012 | 251 | * DESCRIPTION: Disable all GPEs within a single GPE block |
1da177e4 LT |
252 | * |
253 | ******************************************************************************/ | |
254 | ||
255 | acpi_status | |
e97d6bf1 BM |
256 | acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
257 | struct acpi_gpe_block_info *gpe_block, void *context) | |
1da177e4 | 258 | { |
4be44fcd LB |
259 | u32 i; |
260 | acpi_status status; | |
1da177e4 LT |
261 | |
262 | /* Examine each GPE Register within the block */ | |
263 | ||
264 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 265 | |
1da177e4 LT |
266 | /* Disable all GPEs in this register */ |
267 | ||
ecfbbc7b | 268 | status = |
c6b5774c BM |
269 | acpi_hw_write(0x00, |
270 | &gpe_block->register_info[i].enable_address); | |
4be44fcd | 271 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
272 | return (status); |
273 | } | |
274 | } | |
275 | ||
276 | return (AE_OK); | |
277 | } | |
278 | ||
1da177e4 LT |
279 | /****************************************************************************** |
280 | * | |
281 | * FUNCTION: acpi_hw_clear_gpe_block | |
282 | * | |
283 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
284 | * gpe_block - Gpe Block info | |
285 | * | |
286 | * RETURN: Status | |
287 | * | |
44f6c012 | 288 | * DESCRIPTION: Clear status bits for all GPEs within a single GPE block |
1da177e4 LT |
289 | * |
290 | ******************************************************************************/ | |
291 | ||
292 | acpi_status | |
e97d6bf1 BM |
293 | acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
294 | struct acpi_gpe_block_info *gpe_block, void *context) | |
1da177e4 | 295 | { |
4be44fcd LB |
296 | u32 i; |
297 | acpi_status status; | |
1da177e4 LT |
298 | |
299 | /* Examine each GPE Register within the block */ | |
300 | ||
301 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 302 | |
1da177e4 LT |
303 | /* Clear status on all GPEs in this register */ |
304 | ||
ecfbbc7b | 305 | status = |
c6b5774c BM |
306 | acpi_hw_write(0xFF, |
307 | &gpe_block->register_info[i].status_address); | |
4be44fcd | 308 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
309 | return (status); |
310 | } | |
311 | } | |
312 | ||
313 | return (AE_OK); | |
314 | } | |
315 | ||
1da177e4 LT |
316 | /****************************************************************************** |
317 | * | |
318 | * FUNCTION: acpi_hw_enable_runtime_gpe_block | |
319 | * | |
320 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
321 | * gpe_block - Gpe Block info | |
322 | * | |
323 | * RETURN: Status | |
324 | * | |
44f6c012 RM |
325 | * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes |
326 | * combination wake/run GPEs. | |
1da177e4 LT |
327 | * |
328 | ******************************************************************************/ | |
329 | ||
330 | acpi_status | |
e97d6bf1 BM |
331 | acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
332 | struct acpi_gpe_block_info *gpe_block, void *context) | |
1da177e4 | 333 | { |
4be44fcd LB |
334 | u32 i; |
335 | acpi_status status; | |
1da177e4 LT |
336 | |
337 | /* NOTE: assumes that all GPEs are currently disabled */ | |
338 | ||
339 | /* Examine each GPE Register within the block */ | |
340 | ||
341 | for (i = 0; i < gpe_block->register_count; i++) { | |
342 | if (!gpe_block->register_info[i].enable_for_run) { | |
343 | continue; | |
344 | } | |
345 | ||
346 | /* Enable all "runtime" GPEs in this register */ | |
347 | ||
c6b5774c BM |
348 | status = |
349 | acpi_hw_write(gpe_block->register_info[i].enable_for_run, | |
350 | &gpe_block->register_info[i].enable_address); | |
4be44fcd | 351 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
352 | return (status); |
353 | } | |
354 | } | |
355 | ||
356 | return (AE_OK); | |
357 | } | |
358 | ||
1da177e4 LT |
359 | /****************************************************************************** |
360 | * | |
361 | * FUNCTION: acpi_hw_enable_wakeup_gpe_block | |
362 | * | |
363 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
364 | * gpe_block - Gpe Block info | |
365 | * | |
366 | * RETURN: Status | |
367 | * | |
44f6c012 RM |
368 | * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes |
369 | * combination wake/run GPEs. | |
1da177e4 LT |
370 | * |
371 | ******************************************************************************/ | |
372 | ||
44f6c012 | 373 | static acpi_status |
4be44fcd | 374 | acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
375 | struct acpi_gpe_block_info *gpe_block, |
376 | void *context) | |
1da177e4 | 377 | { |
4be44fcd LB |
378 | u32 i; |
379 | acpi_status status; | |
1da177e4 LT |
380 | |
381 | /* Examine each GPE Register within the block */ | |
382 | ||
383 | for (i = 0; i < gpe_block->register_count; i++) { | |
384 | if (!gpe_block->register_info[i].enable_for_wake) { | |
385 | continue; | |
386 | } | |
387 | ||
388 | /* Enable all "wake" GPEs in this register */ | |
389 | ||
c6b5774c BM |
390 | status = |
391 | acpi_hw_write(gpe_block->register_info[i].enable_for_wake, | |
392 | &gpe_block->register_info[i].enable_address); | |
4be44fcd | 393 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
394 | return (status); |
395 | } | |
396 | } | |
397 | ||
398 | return (AE_OK); | |
399 | } | |
400 | ||
1da177e4 LT |
401 | /****************************************************************************** |
402 | * | |
403 | * FUNCTION: acpi_hw_disable_all_gpes | |
404 | * | |
73459f73 | 405 | * PARAMETERS: None |
1da177e4 LT |
406 | * |
407 | * RETURN: Status | |
408 | * | |
44f6c012 | 409 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks |
1da177e4 LT |
410 | * |
411 | ******************************************************************************/ | |
412 | ||
4be44fcd | 413 | acpi_status acpi_hw_disable_all_gpes(void) |
1da177e4 | 414 | { |
4be44fcd | 415 | acpi_status status; |
1da177e4 | 416 | |
b229cf92 | 417 | ACPI_FUNCTION_TRACE(hw_disable_all_gpes); |
1da177e4 | 418 | |
e97d6bf1 BM |
419 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); |
420 | status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block, NULL); | |
4be44fcd | 421 | return_ACPI_STATUS(status); |
1da177e4 LT |
422 | } |
423 | ||
1da177e4 LT |
424 | /****************************************************************************** |
425 | * | |
426 | * FUNCTION: acpi_hw_enable_all_runtime_gpes | |
427 | * | |
73459f73 | 428 | * PARAMETERS: None |
1da177e4 LT |
429 | * |
430 | * RETURN: Status | |
431 | * | |
44f6c012 | 432 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks |
1da177e4 LT |
433 | * |
434 | ******************************************************************************/ | |
435 | ||
4be44fcd | 436 | acpi_status acpi_hw_enable_all_runtime_gpes(void) |
1da177e4 | 437 | { |
4be44fcd | 438 | acpi_status status; |
1da177e4 | 439 | |
b229cf92 | 440 | ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes); |
1da177e4 | 441 | |
e97d6bf1 | 442 | status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block, NULL); |
4be44fcd | 443 | return_ACPI_STATUS(status); |
1da177e4 LT |
444 | } |
445 | ||
1da177e4 LT |
446 | /****************************************************************************** |
447 | * | |
448 | * FUNCTION: acpi_hw_enable_all_wakeup_gpes | |
449 | * | |
73459f73 | 450 | * PARAMETERS: None |
1da177e4 LT |
451 | * |
452 | * RETURN: Status | |
453 | * | |
44f6c012 | 454 | * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks |
1da177e4 LT |
455 | * |
456 | ******************************************************************************/ | |
457 | ||
4be44fcd | 458 | acpi_status acpi_hw_enable_all_wakeup_gpes(void) |
1da177e4 | 459 | { |
4be44fcd | 460 | acpi_status status; |
1da177e4 | 461 | |
b229cf92 | 462 | ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes); |
1da177e4 | 463 | |
e97d6bf1 | 464 | status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL); |
4be44fcd | 465 | return_ACPI_STATUS(status); |
1da177e4 | 466 | } |