Commit | Line | Data |
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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> | |
50df4d8b | 46 | #include <acpi/accommon.h> |
1da177e4 LT |
47 | #include <acpi/acevents.h> |
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 | ||
ecfbbc7b | 85 | status = acpi_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 | ||
92 | ACPI_CLEAR_BIT(enable_mask, | |
93 | ((u32) 1 << | |
94 | (gpe_event_info->gpe_number - | |
95 | gpe_register_info->base_gpe_number))); | |
96 | ||
97 | /* Write the updated enable mask */ | |
98 | ||
ecfbbc7b | 99 | status = acpi_write(enable_mask, &gpe_register_info->enable_address); |
e38e8a07 BM |
100 | return (status); |
101 | } | |
102 | ||
1da177e4 LT |
103 | /****************************************************************************** |
104 | * | |
105 | * FUNCTION: acpi_hw_write_gpe_enable_reg | |
106 | * | |
107 | * PARAMETERS: gpe_event_info - Info block for the GPE to be enabled | |
108 | * | |
109 | * RETURN: Status | |
110 | * | |
111 | * DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must | |
112 | * already be cleared or set in the parent register | |
113 | * enable_for_run mask. | |
114 | * | |
115 | ******************************************************************************/ | |
116 | ||
117 | acpi_status | |
e38e8a07 | 118 | acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info) |
1da177e4 | 119 | { |
4be44fcd LB |
120 | struct acpi_gpe_register_info *gpe_register_info; |
121 | acpi_status status; | |
1da177e4 | 122 | |
4be44fcd | 123 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
124 | |
125 | /* Get the info block for the entire GPE register */ | |
126 | ||
127 | gpe_register_info = gpe_event_info->register_info; | |
128 | if (!gpe_register_info) { | |
129 | return (AE_NOT_EXIST); | |
130 | } | |
131 | ||
132 | /* Write the entire GPE (runtime) enable register */ | |
133 | ||
ecfbbc7b BM |
134 | status = acpi_write(gpe_register_info->enable_for_run, |
135 | &gpe_register_info->enable_address); | |
1da177e4 LT |
136 | |
137 | return (status); | |
138 | } | |
139 | ||
1da177e4 LT |
140 | /****************************************************************************** |
141 | * | |
142 | * FUNCTION: acpi_hw_clear_gpe | |
143 | * | |
144 | * PARAMETERS: gpe_event_info - Info block for the GPE to be cleared | |
145 | * | |
146 | * RETURN: Status | |
147 | * | |
148 | * DESCRIPTION: Clear the status bit for a single GPE. | |
149 | * | |
150 | ******************************************************************************/ | |
151 | ||
4be44fcd | 152 | acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info) |
1da177e4 | 153 | { |
4be44fcd | 154 | acpi_status status; |
69874165 | 155 | u8 register_bit; |
1da177e4 | 156 | |
4be44fcd | 157 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 158 | |
69874165 AS |
159 | register_bit = (u8) |
160 | (1 << | |
161 | (gpe_event_info->gpe_number - | |
162 | gpe_event_info->register_info->base_gpe_number)); | |
163 | ||
1da177e4 LT |
164 | /* |
165 | * Write a one to the appropriate bit in the status register to | |
166 | * clear this GPE. | |
167 | */ | |
ecfbbc7b BM |
168 | status = acpi_write(register_bit, |
169 | &gpe_event_info->register_info->status_address); | |
1da177e4 LT |
170 | |
171 | return (status); | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /****************************************************************************** |
175 | * | |
176 | * FUNCTION: acpi_hw_get_gpe_status | |
177 | * | |
178 | * PARAMETERS: gpe_event_info - Info block for the GPE to queried | |
179 | * event_status - Where the GPE status is returned | |
180 | * | |
181 | * RETURN: Status | |
182 | * | |
183 | * DESCRIPTION: Return the status of a single GPE. | |
184 | * | |
185 | ******************************************************************************/ | |
44f6c012 | 186 | |
1da177e4 | 187 | acpi_status |
4be44fcd LB |
188 | acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info, |
189 | acpi_event_status * event_status) | |
1da177e4 | 190 | { |
4be44fcd LB |
191 | u32 in_byte; |
192 | u8 register_bit; | |
193 | struct acpi_gpe_register_info *gpe_register_info; | |
194 | acpi_status status; | |
195 | acpi_event_status local_event_status = 0; | |
1da177e4 | 196 | |
4be44fcd | 197 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
198 | |
199 | if (!event_status) { | |
200 | return (AE_BAD_PARAMETER); | |
201 | } | |
202 | ||
203 | /* Get the info block for the entire GPE register */ | |
204 | ||
205 | gpe_register_info = gpe_event_info->register_info; | |
206 | ||
207 | /* Get the register bitmask for this GPE */ | |
208 | ||
69874165 AS |
209 | register_bit = (u8) |
210 | (1 << | |
211 | (gpe_event_info->gpe_number - | |
212 | gpe_event_info->register_info->base_gpe_number)); | |
1da177e4 LT |
213 | |
214 | /* GPE currently enabled? (enabled for runtime?) */ | |
215 | ||
216 | if (register_bit & gpe_register_info->enable_for_run) { | |
217 | local_event_status |= ACPI_EVENT_FLAG_ENABLED; | |
218 | } | |
219 | ||
220 | /* GPE enabled for wake? */ | |
221 | ||
222 | if (register_bit & gpe_register_info->enable_for_wake) { | |
223 | local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED; | |
224 | } | |
225 | ||
226 | /* GPE currently active (status bit == 1)? */ | |
227 | ||
ecfbbc7b | 228 | status = acpi_read(&in_byte, &gpe_register_info->status_address); |
4be44fcd | 229 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
230 | goto unlock_and_exit; |
231 | } | |
232 | ||
233 | if (register_bit & in_byte) { | |
234 | local_event_status |= ACPI_EVENT_FLAG_SET; | |
235 | } | |
236 | ||
237 | /* Set return value */ | |
238 | ||
239 | (*event_status) = local_event_status; | |
240 | ||
4be44fcd | 241 | unlock_and_exit: |
1da177e4 LT |
242 | return (status); |
243 | } | |
1da177e4 LT |
244 | |
245 | /****************************************************************************** | |
246 | * | |
247 | * FUNCTION: acpi_hw_disable_gpe_block | |
248 | * | |
249 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
250 | * gpe_block - Gpe Block info | |
251 | * | |
252 | * RETURN: Status | |
253 | * | |
44f6c012 | 254 | * DESCRIPTION: Disable all GPEs within a single GPE block |
1da177e4 LT |
255 | * |
256 | ******************************************************************************/ | |
257 | ||
258 | acpi_status | |
e97d6bf1 BM |
259 | acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
260 | struct acpi_gpe_block_info *gpe_block, void *context) | |
1da177e4 | 261 | { |
4be44fcd LB |
262 | u32 i; |
263 | acpi_status status; | |
1da177e4 LT |
264 | |
265 | /* Examine each GPE Register within the block */ | |
266 | ||
267 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 268 | |
1da177e4 LT |
269 | /* Disable all GPEs in this register */ |
270 | ||
ecfbbc7b BM |
271 | status = |
272 | acpi_write(0x00, | |
273 | &gpe_block->register_info[i].enable_address); | |
4be44fcd | 274 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
275 | return (status); |
276 | } | |
277 | } | |
278 | ||
279 | return (AE_OK); | |
280 | } | |
281 | ||
1da177e4 LT |
282 | /****************************************************************************** |
283 | * | |
284 | * FUNCTION: acpi_hw_clear_gpe_block | |
285 | * | |
286 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
287 | * gpe_block - Gpe Block info | |
288 | * | |
289 | * RETURN: Status | |
290 | * | |
44f6c012 | 291 | * DESCRIPTION: Clear status bits for all GPEs within a single GPE block |
1da177e4 LT |
292 | * |
293 | ******************************************************************************/ | |
294 | ||
295 | acpi_status | |
e97d6bf1 BM |
296 | acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
297 | struct acpi_gpe_block_info *gpe_block, void *context) | |
1da177e4 | 298 | { |
4be44fcd LB |
299 | u32 i; |
300 | acpi_status status; | |
1da177e4 LT |
301 | |
302 | /* Examine each GPE Register within the block */ | |
303 | ||
304 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 305 | |
1da177e4 LT |
306 | /* Clear status on all GPEs in this register */ |
307 | ||
ecfbbc7b BM |
308 | status = |
309 | acpi_write(0xFF, | |
310 | &gpe_block->register_info[i].status_address); | |
4be44fcd | 311 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
312 | return (status); |
313 | } | |
314 | } | |
315 | ||
316 | return (AE_OK); | |
317 | } | |
318 | ||
1da177e4 LT |
319 | /****************************************************************************** |
320 | * | |
321 | * FUNCTION: acpi_hw_enable_runtime_gpe_block | |
322 | * | |
323 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
324 | * gpe_block - Gpe Block info | |
325 | * | |
326 | * RETURN: Status | |
327 | * | |
44f6c012 RM |
328 | * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes |
329 | * combination wake/run GPEs. | |
1da177e4 LT |
330 | * |
331 | ******************************************************************************/ | |
332 | ||
333 | acpi_status | |
e97d6bf1 BM |
334 | acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
335 | struct acpi_gpe_block_info *gpe_block, void *context) | |
1da177e4 | 336 | { |
4be44fcd LB |
337 | u32 i; |
338 | acpi_status status; | |
1da177e4 LT |
339 | |
340 | /* NOTE: assumes that all GPEs are currently disabled */ | |
341 | ||
342 | /* Examine each GPE Register within the block */ | |
343 | ||
344 | for (i = 0; i < gpe_block->register_count; i++) { | |
345 | if (!gpe_block->register_info[i].enable_for_run) { | |
346 | continue; | |
347 | } | |
348 | ||
349 | /* Enable all "runtime" GPEs in this register */ | |
350 | ||
ecfbbc7b BM |
351 | status = acpi_write(gpe_block->register_info[i].enable_for_run, |
352 | &gpe_block->register_info[i]. | |
353 | enable_address); | |
4be44fcd | 354 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
355 | return (status); |
356 | } | |
357 | } | |
358 | ||
359 | return (AE_OK); | |
360 | } | |
361 | ||
1da177e4 LT |
362 | /****************************************************************************** |
363 | * | |
364 | * FUNCTION: acpi_hw_enable_wakeup_gpe_block | |
365 | * | |
366 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
367 | * gpe_block - Gpe Block info | |
368 | * | |
369 | * RETURN: Status | |
370 | * | |
44f6c012 RM |
371 | * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes |
372 | * combination wake/run GPEs. | |
1da177e4 LT |
373 | * |
374 | ******************************************************************************/ | |
375 | ||
44f6c012 | 376 | static acpi_status |
4be44fcd | 377 | acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
378 | struct acpi_gpe_block_info *gpe_block, |
379 | void *context) | |
1da177e4 | 380 | { |
4be44fcd LB |
381 | u32 i; |
382 | acpi_status status; | |
1da177e4 LT |
383 | |
384 | /* Examine each GPE Register within the block */ | |
385 | ||
386 | for (i = 0; i < gpe_block->register_count; i++) { | |
387 | if (!gpe_block->register_info[i].enable_for_wake) { | |
388 | continue; | |
389 | } | |
390 | ||
391 | /* Enable all "wake" GPEs in this register */ | |
392 | ||
ecfbbc7b BM |
393 | status = acpi_write(gpe_block->register_info[i].enable_for_wake, |
394 | &gpe_block->register_info[i]. | |
395 | enable_address); | |
4be44fcd | 396 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
397 | return (status); |
398 | } | |
399 | } | |
400 | ||
401 | return (AE_OK); | |
402 | } | |
403 | ||
1da177e4 LT |
404 | /****************************************************************************** |
405 | * | |
406 | * FUNCTION: acpi_hw_disable_all_gpes | |
407 | * | |
73459f73 | 408 | * PARAMETERS: None |
1da177e4 LT |
409 | * |
410 | * RETURN: Status | |
411 | * | |
44f6c012 | 412 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks |
1da177e4 LT |
413 | * |
414 | ******************************************************************************/ | |
415 | ||
4be44fcd | 416 | acpi_status acpi_hw_disable_all_gpes(void) |
1da177e4 | 417 | { |
4be44fcd | 418 | acpi_status status; |
1da177e4 | 419 | |
b229cf92 | 420 | ACPI_FUNCTION_TRACE(hw_disable_all_gpes); |
1da177e4 | 421 | |
e97d6bf1 BM |
422 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); |
423 | status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block, NULL); | |
4be44fcd | 424 | return_ACPI_STATUS(status); |
1da177e4 LT |
425 | } |
426 | ||
1da177e4 LT |
427 | /****************************************************************************** |
428 | * | |
429 | * FUNCTION: acpi_hw_enable_all_runtime_gpes | |
430 | * | |
73459f73 | 431 | * PARAMETERS: None |
1da177e4 LT |
432 | * |
433 | * RETURN: Status | |
434 | * | |
44f6c012 | 435 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks |
1da177e4 LT |
436 | * |
437 | ******************************************************************************/ | |
438 | ||
4be44fcd | 439 | acpi_status acpi_hw_enable_all_runtime_gpes(void) |
1da177e4 | 440 | { |
4be44fcd | 441 | acpi_status status; |
1da177e4 | 442 | |
b229cf92 | 443 | ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes); |
1da177e4 | 444 | |
e97d6bf1 | 445 | status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block, NULL); |
4be44fcd | 446 | return_ACPI_STATUS(status); |
1da177e4 LT |
447 | } |
448 | ||
1da177e4 LT |
449 | /****************************************************************************** |
450 | * | |
451 | * FUNCTION: acpi_hw_enable_all_wakeup_gpes | |
452 | * | |
73459f73 | 453 | * PARAMETERS: None |
1da177e4 LT |
454 | * |
455 | * RETURN: Status | |
456 | * | |
44f6c012 | 457 | * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks |
1da177e4 LT |
458 | * |
459 | ******************************************************************************/ | |
460 | ||
4be44fcd | 461 | acpi_status acpi_hw_enable_all_wakeup_gpes(void) |
1da177e4 | 462 | { |
4be44fcd | 463 | acpi_status status; |
1da177e4 | 464 | |
b229cf92 | 465 | ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes); |
1da177e4 | 466 | |
e97d6bf1 | 467 | status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL); |
4be44fcd | 468 | return_ACPI_STATUS(status); |
1da177e4 | 469 | } |