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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
b4e104ea | 8 | * Copyright (C) 2000 - 2011, Intel Corp. |
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 | 44 | #include <acpi/acpi.h> |
e2f7a777 | 45 | #include "accommon.h" |
e2f7a777 | 46 | #include "actables.h" |
1da177e4 LT |
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 | ******************************************************************************/ | |
e97d6bf1 | 62 | |
4be44fcd | 63 | acpi_status acpi_enable(void) |
1da177e4 | 64 | { |
b430acbd | 65 | acpi_status status; |
3d695839 | 66 | int retry; |
1da177e4 | 67 | |
b229cf92 | 68 | ACPI_FUNCTION_TRACE(acpi_enable); |
1da177e4 | 69 | |
c857303a BM |
70 | /* ACPI tables must be present */ |
71 | ||
72 | if (!acpi_tb_tables_loaded()) { | |
73 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); | |
74 | } | |
75 | ||
76 | /* Check current mode */ | |
77 | ||
1da177e4 | 78 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
4be44fcd LB |
79 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
80 | "System is already in ACPI mode\n")); | |
b430acbd LB |
81 | return_ACPI_STATUS(AE_OK); |
82 | } | |
1da177e4 | 83 | |
b430acbd | 84 | /* Transition to ACPI mode */ |
1da177e4 | 85 | |
b430acbd LB |
86 | status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
87 | if (ACPI_FAILURE(status)) { | |
88 | ACPI_ERROR((AE_INFO, | |
89 | "Could not transition to ACPI mode")); | |
90 | return_ACPI_STATUS(status); | |
91 | } | |
92 | ||
93 | /* Sanity check that transition succeeded */ | |
94 | ||
3d695839 LB |
95 | for (retry = 0; retry < 30000; ++retry) { |
96 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { | |
97 | if (retry != 0) | |
98 | ACPI_WARNING((AE_INFO, | |
99 | "Platform took > %d00 usec to enter ACPI mode", retry)); | |
100 | return_ACPI_STATUS(AE_OK); | |
101 | } | |
102 | acpi_os_stall(100); /* 100 usec */ | |
1da177e4 LT |
103 | } |
104 | ||
3d695839 LB |
105 | ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode")); |
106 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); | |
1da177e4 LT |
107 | } |
108 | ||
8313524a BM |
109 | ACPI_EXPORT_SYMBOL(acpi_enable) |
110 | ||
1da177e4 LT |
111 | /******************************************************************************* |
112 | * | |
113 | * FUNCTION: acpi_disable | |
114 | * | |
115 | * PARAMETERS: None | |
116 | * | |
117 | * RETURN: Status | |
118 | * | |
44f6c012 | 119 | * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. |
1da177e4 LT |
120 | * |
121 | ******************************************************************************/ | |
4be44fcd | 122 | acpi_status acpi_disable(void) |
1da177e4 | 123 | { |
4be44fcd | 124 | acpi_status status = AE_OK; |
1da177e4 | 125 | |
b229cf92 | 126 | ACPI_FUNCTION_TRACE(acpi_disable); |
1da177e4 | 127 | |
1da177e4 | 128 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { |
4be44fcd LB |
129 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
130 | "System is already in legacy (non-ACPI) mode\n")); | |
131 | } else { | |
1da177e4 LT |
132 | /* Transition to LEGACY mode */ |
133 | ||
4be44fcd | 134 | status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
1da177e4 | 135 | |
4be44fcd | 136 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
137 | ACPI_ERROR((AE_INFO, |
138 | "Could not exit ACPI mode to legacy mode")); | |
4be44fcd | 139 | return_ACPI_STATUS(status); |
1da177e4 LT |
140 | } |
141 | ||
4be44fcd | 142 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
1da177e4 LT |
143 | } |
144 | ||
4be44fcd | 145 | return_ACPI_STATUS(status); |
1da177e4 LT |
146 | } |
147 | ||
8313524a BM |
148 | ACPI_EXPORT_SYMBOL(acpi_disable) |
149 | ||
1da177e4 LT |
150 | /******************************************************************************* |
151 | * | |
152 | * FUNCTION: acpi_enable_event | |
153 | * | |
154 | * PARAMETERS: Event - The fixed eventto be enabled | |
155 | * Flags - Reserved | |
156 | * | |
157 | * RETURN: Status | |
158 | * | |
159 | * DESCRIPTION: Enable an ACPI event (fixed) | |
160 | * | |
161 | ******************************************************************************/ | |
4be44fcd | 162 | acpi_status acpi_enable_event(u32 event, u32 flags) |
1da177e4 | 163 | { |
4be44fcd LB |
164 | acpi_status status = AE_OK; |
165 | u32 value; | |
1da177e4 | 166 | |
b229cf92 | 167 | ACPI_FUNCTION_TRACE(acpi_enable_event); |
1da177e4 LT |
168 | |
169 | /* Decode the Fixed Event */ | |
170 | ||
171 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 172 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
173 | } |
174 | ||
175 | /* | |
9f15fc66 BM |
176 | * Enable the requested fixed event (by writing a one to the enable |
177 | * register bit) | |
1da177e4 | 178 | */ |
4be44fcd | 179 | status = |
50ffba1b | 180 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 181 | enable_register_id, ACPI_ENABLE_EVENT); |
4be44fcd LB |
182 | if (ACPI_FAILURE(status)) { |
183 | return_ACPI_STATUS(status); | |
1da177e4 LT |
184 | } |
185 | ||
186 | /* Make sure that the hardware responded */ | |
187 | ||
4be44fcd | 188 | status = |
50ffba1b BM |
189 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
190 | enable_register_id, &value); | |
4be44fcd LB |
191 | if (ACPI_FAILURE(status)) { |
192 | return_ACPI_STATUS(status); | |
1da177e4 LT |
193 | } |
194 | ||
195 | if (value != 1) { | |
b8e4d893 BM |
196 | ACPI_ERROR((AE_INFO, |
197 | "Could not enable %s event", | |
198 | acpi_ut_get_event_name(event))); | |
4be44fcd | 199 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
200 | } |
201 | ||
4be44fcd | 202 | return_ACPI_STATUS(status); |
1da177e4 | 203 | } |
1da177e4 | 204 | |
8313524a | 205 | ACPI_EXPORT_SYMBOL(acpi_enable_event) |
1da177e4 | 206 | |
1da177e4 LT |
207 | /******************************************************************************* |
208 | * | |
209 | * FUNCTION: acpi_disable_event | |
210 | * | |
211 | * PARAMETERS: Event - The fixed eventto be enabled | |
212 | * Flags - Reserved | |
213 | * | |
214 | * RETURN: Status | |
215 | * | |
216 | * DESCRIPTION: Disable an ACPI event (fixed) | |
217 | * | |
218 | ******************************************************************************/ | |
4be44fcd | 219 | acpi_status acpi_disable_event(u32 event, u32 flags) |
1da177e4 | 220 | { |
4be44fcd LB |
221 | acpi_status status = AE_OK; |
222 | u32 value; | |
1da177e4 | 223 | |
b229cf92 | 224 | ACPI_FUNCTION_TRACE(acpi_disable_event); |
1da177e4 LT |
225 | |
226 | /* Decode the Fixed Event */ | |
227 | ||
228 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 229 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
230 | } |
231 | ||
232 | /* | |
9f15fc66 BM |
233 | * Disable the requested fixed event (by writing a zero to the enable |
234 | * register bit) | |
1da177e4 | 235 | */ |
4be44fcd | 236 | status = |
50ffba1b | 237 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 238 | enable_register_id, ACPI_DISABLE_EVENT); |
4be44fcd LB |
239 | if (ACPI_FAILURE(status)) { |
240 | return_ACPI_STATUS(status); | |
1da177e4 LT |
241 | } |
242 | ||
4be44fcd | 243 | status = |
50ffba1b BM |
244 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
245 | enable_register_id, &value); | |
4be44fcd LB |
246 | if (ACPI_FAILURE(status)) { |
247 | return_ACPI_STATUS(status); | |
1da177e4 LT |
248 | } |
249 | ||
250 | if (value != 0) { | |
b8e4d893 BM |
251 | ACPI_ERROR((AE_INFO, |
252 | "Could not disable %s events", | |
253 | acpi_ut_get_event_name(event))); | |
4be44fcd | 254 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
255 | } |
256 | ||
4be44fcd | 257 | return_ACPI_STATUS(status); |
1da177e4 | 258 | } |
1da177e4 | 259 | |
8313524a | 260 | ACPI_EXPORT_SYMBOL(acpi_disable_event) |
1da177e4 LT |
261 | |
262 | /******************************************************************************* | |
263 | * | |
264 | * FUNCTION: acpi_clear_event | |
265 | * | |
266 | * PARAMETERS: Event - The fixed event to be cleared | |
267 | * | |
268 | * RETURN: Status | |
269 | * | |
270 | * DESCRIPTION: Clear an ACPI event (fixed) | |
271 | * | |
272 | ******************************************************************************/ | |
4be44fcd | 273 | acpi_status acpi_clear_event(u32 event) |
1da177e4 | 274 | { |
4be44fcd | 275 | acpi_status status = AE_OK; |
1da177e4 | 276 | |
b229cf92 | 277 | ACPI_FUNCTION_TRACE(acpi_clear_event); |
1da177e4 LT |
278 | |
279 | /* Decode the Fixed Event */ | |
280 | ||
281 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 282 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
283 | } |
284 | ||
285 | /* | |
9f15fc66 BM |
286 | * Clear the requested fixed event (By writing a one to the status |
287 | * register bit) | |
1da177e4 | 288 | */ |
4be44fcd | 289 | status = |
50ffba1b | 290 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 291 | status_register_id, ACPI_CLEAR_STATUS); |
1da177e4 | 292 | |
4be44fcd | 293 | return_ACPI_STATUS(status); |
1da177e4 | 294 | } |
1da177e4 | 295 | |
8313524a | 296 | ACPI_EXPORT_SYMBOL(acpi_clear_event) |
1da177e4 | 297 | |
1da177e4 LT |
298 | /******************************************************************************* |
299 | * | |
300 | * FUNCTION: acpi_get_event_status | |
301 | * | |
302 | * PARAMETERS: Event - The fixed event | |
44f6c012 | 303 | * event_status - Where the current status of the event will |
1da177e4 LT |
304 | * be returned |
305 | * | |
306 | * RETURN: Status | |
307 | * | |
308 | * DESCRIPTION: Obtains and returns the current status of the event | |
309 | * | |
310 | ******************************************************************************/ | |
4be44fcd | 311 | acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status) |
1da177e4 | 312 | { |
4be44fcd | 313 | acpi_status status = AE_OK; |
71b58cbb | 314 | u32 value; |
1da177e4 | 315 | |
b229cf92 | 316 | ACPI_FUNCTION_TRACE(acpi_get_event_status); |
1da177e4 LT |
317 | |
318 | if (!event_status) { | |
4be44fcd | 319 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
320 | } |
321 | ||
322 | /* Decode the Fixed Event */ | |
323 | ||
324 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 325 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
326 | } |
327 | ||
328 | /* Get the status of the requested fixed event */ | |
329 | ||
4be44fcd | 330 | status = |
50ffba1b | 331 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
71b58cbb ZR |
332 | enable_register_id, &value); |
333 | if (ACPI_FAILURE(status)) | |
334 | return_ACPI_STATUS(status); | |
335 | ||
336 | *event_status = value; | |
337 | ||
338 | status = | |
50ffba1b | 339 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
71b58cbb ZR |
340 | status_register_id, &value); |
341 | if (ACPI_FAILURE(status)) | |
342 | return_ACPI_STATUS(status); | |
343 | ||
344 | if (value) | |
345 | *event_status |= ACPI_EVENT_FLAG_SET; | |
1da177e4 | 346 | |
ed206fac ZR |
347 | if (acpi_gbl_fixed_event_handlers[event].handler) |
348 | *event_status |= ACPI_EVENT_FLAG_HANDLE; | |
349 | ||
4be44fcd | 350 | return_ACPI_STATUS(status); |
1da177e4 LT |
351 | } |
352 | ||
8313524a | 353 | ACPI_EXPORT_SYMBOL(acpi_get_event_status) |