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> | |
46 | #include <acpi/acevents.h> | |
47 | ||
48 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 49 | ACPI_MODULE_NAME("hwgpe") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
44f6c012 | 52 | static acpi_status |
4be44fcd LB |
53 | acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
54 | struct acpi_gpe_block_info *gpe_block); | |
1da177e4 LT |
55 | |
56 | /****************************************************************************** | |
57 | * | |
58 | * FUNCTION: acpi_hw_write_gpe_enable_reg | |
59 | * | |
60 | * PARAMETERS: gpe_event_info - Info block for the GPE to be enabled | |
61 | * | |
62 | * RETURN: Status | |
63 | * | |
64 | * DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must | |
65 | * already be cleared or set in the parent register | |
66 | * enable_for_run mask. | |
67 | * | |
68 | ******************************************************************************/ | |
69 | ||
70 | acpi_status | |
4be44fcd | 71 | acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 72 | { |
4be44fcd LB |
73 | struct acpi_gpe_register_info *gpe_register_info; |
74 | acpi_status status; | |
1da177e4 | 75 | |
4be44fcd | 76 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
77 | |
78 | /* Get the info block for the entire GPE register */ | |
79 | ||
80 | gpe_register_info = gpe_event_info->register_info; | |
81 | if (!gpe_register_info) { | |
82 | return (AE_NOT_EXIST); | |
83 | } | |
84 | ||
85 | /* Write the entire GPE (runtime) enable register */ | |
86 | ||
4be44fcd LB |
87 | status = acpi_hw_low_level_write(8, gpe_register_info->enable_for_run, |
88 | &gpe_register_info->enable_address); | |
1da177e4 LT |
89 | |
90 | return (status); | |
91 | } | |
92 | ||
1da177e4 LT |
93 | /****************************************************************************** |
94 | * | |
95 | * FUNCTION: acpi_hw_clear_gpe | |
96 | * | |
97 | * PARAMETERS: gpe_event_info - Info block for the GPE to be cleared | |
98 | * | |
99 | * RETURN: Status | |
100 | * | |
101 | * DESCRIPTION: Clear the status bit for a single GPE. | |
102 | * | |
103 | ******************************************************************************/ | |
104 | ||
4be44fcd | 105 | acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info) |
1da177e4 | 106 | { |
4be44fcd | 107 | acpi_status status; |
69874165 | 108 | u8 register_bit; |
1da177e4 | 109 | |
4be44fcd | 110 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 111 | |
69874165 AS |
112 | register_bit = (u8) |
113 | (1 << | |
114 | (gpe_event_info->gpe_number - | |
115 | gpe_event_info->register_info->base_gpe_number)); | |
116 | ||
1da177e4 LT |
117 | /* |
118 | * Write a one to the appropriate bit in the status register to | |
119 | * clear this GPE. | |
120 | */ | |
69874165 | 121 | status = acpi_hw_low_level_write(8, register_bit, |
4be44fcd LB |
122 | &gpe_event_info->register_info-> |
123 | status_address); | |
1da177e4 LT |
124 | |
125 | return (status); | |
126 | } | |
127 | ||
1da177e4 LT |
128 | /****************************************************************************** |
129 | * | |
130 | * FUNCTION: acpi_hw_get_gpe_status | |
131 | * | |
132 | * PARAMETERS: gpe_event_info - Info block for the GPE to queried | |
133 | * event_status - Where the GPE status is returned | |
134 | * | |
135 | * RETURN: Status | |
136 | * | |
137 | * DESCRIPTION: Return the status of a single GPE. | |
138 | * | |
139 | ******************************************************************************/ | |
44f6c012 | 140 | |
1da177e4 LT |
141 | #ifdef ACPI_FUTURE_USAGE |
142 | acpi_status | |
4be44fcd LB |
143 | acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info, |
144 | acpi_event_status * event_status) | |
1da177e4 | 145 | { |
4be44fcd LB |
146 | u32 in_byte; |
147 | u8 register_bit; | |
148 | struct acpi_gpe_register_info *gpe_register_info; | |
149 | acpi_status status; | |
150 | acpi_event_status local_event_status = 0; | |
1da177e4 | 151 | |
4be44fcd | 152 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
153 | |
154 | if (!event_status) { | |
155 | return (AE_BAD_PARAMETER); | |
156 | } | |
157 | ||
158 | /* Get the info block for the entire GPE register */ | |
159 | ||
160 | gpe_register_info = gpe_event_info->register_info; | |
161 | ||
162 | /* Get the register bitmask for this GPE */ | |
163 | ||
69874165 AS |
164 | register_bit = (u8) |
165 | (1 << | |
166 | (gpe_event_info->gpe_number - | |
167 | gpe_event_info->register_info->base_gpe_number)); | |
1da177e4 LT |
168 | |
169 | /* GPE currently enabled? (enabled for runtime?) */ | |
170 | ||
171 | if (register_bit & gpe_register_info->enable_for_run) { | |
172 | local_event_status |= ACPI_EVENT_FLAG_ENABLED; | |
173 | } | |
174 | ||
175 | /* GPE enabled for wake? */ | |
176 | ||
177 | if (register_bit & gpe_register_info->enable_for_wake) { | |
178 | local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED; | |
179 | } | |
180 | ||
181 | /* GPE currently active (status bit == 1)? */ | |
182 | ||
4be44fcd LB |
183 | status = |
184 | acpi_hw_low_level_read(8, &in_byte, | |
185 | &gpe_register_info->status_address); | |
186 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
187 | goto unlock_and_exit; |
188 | } | |
189 | ||
190 | if (register_bit & in_byte) { | |
191 | local_event_status |= ACPI_EVENT_FLAG_SET; | |
192 | } | |
193 | ||
194 | /* Set return value */ | |
195 | ||
196 | (*event_status) = local_event_status; | |
197 | ||
4be44fcd | 198 | unlock_and_exit: |
1da177e4 LT |
199 | return (status); |
200 | } | |
4be44fcd | 201 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
202 | |
203 | /****************************************************************************** | |
204 | * | |
205 | * FUNCTION: acpi_hw_disable_gpe_block | |
206 | * | |
207 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
208 | * gpe_block - Gpe Block info | |
209 | * | |
210 | * RETURN: Status | |
211 | * | |
44f6c012 | 212 | * DESCRIPTION: Disable all GPEs within a single GPE block |
1da177e4 LT |
213 | * |
214 | ******************************************************************************/ | |
215 | ||
216 | acpi_status | |
4be44fcd LB |
217 | acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info, |
218 | struct acpi_gpe_block_info * gpe_block) | |
1da177e4 | 219 | { |
4be44fcd LB |
220 | u32 i; |
221 | acpi_status status; | |
1da177e4 LT |
222 | |
223 | /* Examine each GPE Register within the block */ | |
224 | ||
225 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 226 | |
1da177e4 LT |
227 | /* Disable all GPEs in this register */ |
228 | ||
4be44fcd LB |
229 | status = acpi_hw_low_level_write(8, 0x00, |
230 | &gpe_block->register_info[i]. | |
231 | enable_address); | |
232 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
233 | return (status); |
234 | } | |
235 | } | |
236 | ||
237 | return (AE_OK); | |
238 | } | |
239 | ||
1da177e4 LT |
240 | /****************************************************************************** |
241 | * | |
242 | * FUNCTION: acpi_hw_clear_gpe_block | |
243 | * | |
244 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
245 | * gpe_block - Gpe Block info | |
246 | * | |
247 | * RETURN: Status | |
248 | * | |
44f6c012 | 249 | * DESCRIPTION: Clear status bits for all GPEs within a single GPE block |
1da177e4 LT |
250 | * |
251 | ******************************************************************************/ | |
252 | ||
253 | acpi_status | |
4be44fcd LB |
254 | acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info, |
255 | struct acpi_gpe_block_info * gpe_block) | |
1da177e4 | 256 | { |
4be44fcd LB |
257 | u32 i; |
258 | acpi_status status; | |
1da177e4 LT |
259 | |
260 | /* Examine each GPE Register within the block */ | |
261 | ||
262 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 263 | |
1da177e4 LT |
264 | /* Clear status on all GPEs in this register */ |
265 | ||
4be44fcd LB |
266 | status = acpi_hw_low_level_write(8, 0xFF, |
267 | &gpe_block->register_info[i]. | |
268 | status_address); | |
269 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
270 | return (status); |
271 | } | |
272 | } | |
273 | ||
274 | return (AE_OK); | |
275 | } | |
276 | ||
1da177e4 LT |
277 | /****************************************************************************** |
278 | * | |
279 | * FUNCTION: acpi_hw_enable_runtime_gpe_block | |
280 | * | |
281 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
282 | * gpe_block - Gpe Block info | |
283 | * | |
284 | * RETURN: Status | |
285 | * | |
44f6c012 RM |
286 | * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes |
287 | * combination wake/run GPEs. | |
1da177e4 LT |
288 | * |
289 | ******************************************************************************/ | |
290 | ||
291 | acpi_status | |
4be44fcd LB |
292 | acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info, |
293 | struct acpi_gpe_block_info * gpe_block) | |
1da177e4 | 294 | { |
4be44fcd LB |
295 | u32 i; |
296 | acpi_status status; | |
1da177e4 LT |
297 | |
298 | /* NOTE: assumes that all GPEs are currently disabled */ | |
299 | ||
300 | /* Examine each GPE Register within the block */ | |
301 | ||
302 | for (i = 0; i < gpe_block->register_count; i++) { | |
303 | if (!gpe_block->register_info[i].enable_for_run) { | |
304 | continue; | |
305 | } | |
306 | ||
307 | /* Enable all "runtime" GPEs in this register */ | |
308 | ||
4be44fcd LB |
309 | status = |
310 | acpi_hw_low_level_write(8, | |
311 | gpe_block->register_info[i]. | |
312 | enable_for_run, | |
313 | &gpe_block->register_info[i]. | |
314 | enable_address); | |
315 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
316 | return (status); |
317 | } | |
318 | } | |
319 | ||
320 | return (AE_OK); | |
321 | } | |
322 | ||
1da177e4 LT |
323 | /****************************************************************************** |
324 | * | |
325 | * FUNCTION: acpi_hw_enable_wakeup_gpe_block | |
326 | * | |
327 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
328 | * gpe_block - Gpe Block info | |
329 | * | |
330 | * RETURN: Status | |
331 | * | |
44f6c012 RM |
332 | * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes |
333 | * combination wake/run GPEs. | |
1da177e4 LT |
334 | * |
335 | ******************************************************************************/ | |
336 | ||
44f6c012 | 337 | static acpi_status |
4be44fcd LB |
338 | acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
339 | struct acpi_gpe_block_info *gpe_block) | |
1da177e4 | 340 | { |
4be44fcd LB |
341 | u32 i; |
342 | acpi_status status; | |
1da177e4 LT |
343 | |
344 | /* Examine each GPE Register within the block */ | |
345 | ||
346 | for (i = 0; i < gpe_block->register_count; i++) { | |
347 | if (!gpe_block->register_info[i].enable_for_wake) { | |
348 | continue; | |
349 | } | |
350 | ||
351 | /* Enable all "wake" GPEs in this register */ | |
352 | ||
4be44fcd LB |
353 | status = acpi_hw_low_level_write(8, |
354 | gpe_block->register_info[i]. | |
355 | enable_for_wake, | |
356 | &gpe_block->register_info[i]. | |
357 | enable_address); | |
358 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
359 | return (status); |
360 | } | |
361 | } | |
362 | ||
363 | return (AE_OK); | |
364 | } | |
365 | ||
1da177e4 LT |
366 | /****************************************************************************** |
367 | * | |
368 | * FUNCTION: acpi_hw_disable_all_gpes | |
369 | * | |
73459f73 | 370 | * PARAMETERS: None |
1da177e4 LT |
371 | * |
372 | * RETURN: Status | |
373 | * | |
44f6c012 | 374 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks |
1da177e4 LT |
375 | * |
376 | ******************************************************************************/ | |
377 | ||
4be44fcd | 378 | acpi_status acpi_hw_disable_all_gpes(void) |
1da177e4 | 379 | { |
4be44fcd | 380 | acpi_status status; |
1da177e4 | 381 | |
b229cf92 | 382 | ACPI_FUNCTION_TRACE(hw_disable_all_gpes); |
1da177e4 | 383 | |
4be44fcd LB |
384 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block); |
385 | status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block); | |
386 | return_ACPI_STATUS(status); | |
1da177e4 LT |
387 | } |
388 | ||
1da177e4 LT |
389 | /****************************************************************************** |
390 | * | |
391 | * FUNCTION: acpi_hw_enable_all_runtime_gpes | |
392 | * | |
73459f73 | 393 | * PARAMETERS: None |
1da177e4 LT |
394 | * |
395 | * RETURN: Status | |
396 | * | |
44f6c012 | 397 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks |
1da177e4 LT |
398 | * |
399 | ******************************************************************************/ | |
400 | ||
4be44fcd | 401 | acpi_status acpi_hw_enable_all_runtime_gpes(void) |
1da177e4 | 402 | { |
4be44fcd | 403 | acpi_status status; |
1da177e4 | 404 | |
b229cf92 | 405 | ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes); |
1da177e4 | 406 | |
4be44fcd LB |
407 | status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block); |
408 | return_ACPI_STATUS(status); | |
1da177e4 LT |
409 | } |
410 | ||
1da177e4 LT |
411 | /****************************************************************************** |
412 | * | |
413 | * FUNCTION: acpi_hw_enable_all_wakeup_gpes | |
414 | * | |
73459f73 | 415 | * PARAMETERS: None |
1da177e4 LT |
416 | * |
417 | * RETURN: Status | |
418 | * | |
44f6c012 | 419 | * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks |
1da177e4 LT |
420 | * |
421 | ******************************************************************************/ | |
422 | ||
4be44fcd | 423 | acpi_status acpi_hw_enable_all_wakeup_gpes(void) |
1da177e4 | 424 | { |
4be44fcd | 425 | acpi_status status; |
1da177e4 | 426 | |
b229cf92 | 427 | ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes); |
1da177e4 | 428 | |
4be44fcd LB |
429 | status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block); |
430 | return_ACPI_STATUS(status); | |
1da177e4 | 431 | } |