Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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 | ||
214f2c90 | 44 | #include <linux/export.h> |
1da177e4 | 45 | #include <acpi/acpi.h> |
e2f7a777 | 46 | #include "accommon.h" |
e2f7a777 | 47 | #include "actables.h" |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evxfevnt") |
1da177e4 | 51 | |
33620c54 | 52 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
1da177e4 LT |
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 | { |
b430acbd | 66 | acpi_status status; |
3d695839 | 67 | int retry; |
1da177e4 | 68 | |
b229cf92 | 69 | ACPI_FUNCTION_TRACE(acpi_enable); |
1da177e4 | 70 | |
c857303a BM |
71 | /* ACPI tables must be present */ |
72 | ||
73 | if (!acpi_tb_tables_loaded()) { | |
74 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); | |
75 | } | |
76 | ||
c39660b2 BM |
77 | /* If the Hardware Reduced flag is set, machine is always in acpi mode */ |
78 | ||
79 | if (acpi_gbl_reduced_hardware) { | |
80 | return_ACPI_STATUS(AE_OK); | |
81 | } | |
82 | ||
c857303a BM |
83 | /* Check current mode */ |
84 | ||
1da177e4 | 85 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
4be44fcd LB |
86 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
87 | "System is already in ACPI mode\n")); | |
b430acbd LB |
88 | return_ACPI_STATUS(AE_OK); |
89 | } | |
1da177e4 | 90 | |
b430acbd | 91 | /* Transition to ACPI mode */ |
1da177e4 | 92 | |
b430acbd LB |
93 | status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
94 | if (ACPI_FAILURE(status)) { | |
95 | ACPI_ERROR((AE_INFO, | |
96 | "Could not transition to ACPI mode")); | |
97 | return_ACPI_STATUS(status); | |
98 | } | |
99 | ||
100 | /* Sanity check that transition succeeded */ | |
101 | ||
3d695839 LB |
102 | for (retry = 0; retry < 30000; ++retry) { |
103 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { | |
104 | if (retry != 0) | |
105 | ACPI_WARNING((AE_INFO, | |
106 | "Platform took > %d00 usec to enter ACPI mode", retry)); | |
107 | return_ACPI_STATUS(AE_OK); | |
108 | } | |
109 | acpi_os_stall(100); /* 100 usec */ | |
1da177e4 LT |
110 | } |
111 | ||
3d695839 LB |
112 | ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode")); |
113 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); | |
1da177e4 LT |
114 | } |
115 | ||
8313524a BM |
116 | ACPI_EXPORT_SYMBOL(acpi_enable) |
117 | ||
1da177e4 LT |
118 | /******************************************************************************* |
119 | * | |
120 | * FUNCTION: acpi_disable | |
121 | * | |
122 | * PARAMETERS: None | |
123 | * | |
124 | * RETURN: Status | |
125 | * | |
44f6c012 | 126 | * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. |
1da177e4 LT |
127 | * |
128 | ******************************************************************************/ | |
4be44fcd | 129 | acpi_status acpi_disable(void) |
1da177e4 | 130 | { |
4be44fcd | 131 | acpi_status status = AE_OK; |
1da177e4 | 132 | |
b229cf92 | 133 | ACPI_FUNCTION_TRACE(acpi_disable); |
1da177e4 | 134 | |
c39660b2 BM |
135 | /* If the Hardware Reduced flag is set, machine is always in acpi mode */ |
136 | ||
137 | if (acpi_gbl_reduced_hardware) { | |
138 | return_ACPI_STATUS(AE_OK); | |
139 | } | |
140 | ||
1da177e4 | 141 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { |
4be44fcd LB |
142 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
143 | "System is already in legacy (non-ACPI) mode\n")); | |
144 | } else { | |
1da177e4 LT |
145 | /* Transition to LEGACY mode */ |
146 | ||
4be44fcd | 147 | status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
1da177e4 | 148 | |
4be44fcd | 149 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
150 | ACPI_ERROR((AE_INFO, |
151 | "Could not exit ACPI mode to legacy mode")); | |
4be44fcd | 152 | return_ACPI_STATUS(status); |
1da177e4 LT |
153 | } |
154 | ||
4be44fcd | 155 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
1da177e4 LT |
156 | } |
157 | ||
4be44fcd | 158 | return_ACPI_STATUS(status); |
1da177e4 LT |
159 | } |
160 | ||
8313524a BM |
161 | ACPI_EXPORT_SYMBOL(acpi_disable) |
162 | ||
1da177e4 LT |
163 | /******************************************************************************* |
164 | * | |
165 | * FUNCTION: acpi_enable_event | |
166 | * | |
ba494bee BM |
167 | * PARAMETERS: event - The fixed eventto be enabled |
168 | * flags - Reserved | |
1da177e4 LT |
169 | * |
170 | * RETURN: Status | |
171 | * | |
172 | * DESCRIPTION: Enable an ACPI event (fixed) | |
173 | * | |
174 | ******************************************************************************/ | |
4be44fcd | 175 | acpi_status acpi_enable_event(u32 event, u32 flags) |
1da177e4 | 176 | { |
4be44fcd LB |
177 | acpi_status status = AE_OK; |
178 | u32 value; | |
1da177e4 | 179 | |
b229cf92 | 180 | ACPI_FUNCTION_TRACE(acpi_enable_event); |
1da177e4 LT |
181 | |
182 | /* Decode the Fixed Event */ | |
183 | ||
184 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 185 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
186 | } |
187 | ||
188 | /* | |
9f15fc66 BM |
189 | * Enable the requested fixed event (by writing a one to the enable |
190 | * register bit) | |
1da177e4 | 191 | */ |
4be44fcd | 192 | status = |
50ffba1b | 193 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 194 | enable_register_id, ACPI_ENABLE_EVENT); |
4be44fcd LB |
195 | if (ACPI_FAILURE(status)) { |
196 | return_ACPI_STATUS(status); | |
1da177e4 LT |
197 | } |
198 | ||
199 | /* Make sure that the hardware responded */ | |
200 | ||
4be44fcd | 201 | status = |
50ffba1b BM |
202 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
203 | enable_register_id, &value); | |
4be44fcd LB |
204 | if (ACPI_FAILURE(status)) { |
205 | return_ACPI_STATUS(status); | |
1da177e4 LT |
206 | } |
207 | ||
208 | if (value != 1) { | |
b8e4d893 BM |
209 | ACPI_ERROR((AE_INFO, |
210 | "Could not enable %s event", | |
211 | acpi_ut_get_event_name(event))); | |
4be44fcd | 212 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
213 | } |
214 | ||
4be44fcd | 215 | return_ACPI_STATUS(status); |
1da177e4 | 216 | } |
1da177e4 | 217 | |
8313524a | 218 | ACPI_EXPORT_SYMBOL(acpi_enable_event) |
1da177e4 | 219 | |
1da177e4 LT |
220 | /******************************************************************************* |
221 | * | |
222 | * FUNCTION: acpi_disable_event | |
223 | * | |
75c8044f LZ |
224 | * PARAMETERS: event - The fixed event to be disabled |
225 | * flags - Reserved | |
1da177e4 LT |
226 | * |
227 | * RETURN: Status | |
228 | * | |
229 | * DESCRIPTION: Disable an ACPI event (fixed) | |
230 | * | |
231 | ******************************************************************************/ | |
4be44fcd | 232 | acpi_status acpi_disable_event(u32 event, u32 flags) |
1da177e4 | 233 | { |
4be44fcd LB |
234 | acpi_status status = AE_OK; |
235 | u32 value; | |
1da177e4 | 236 | |
b229cf92 | 237 | ACPI_FUNCTION_TRACE(acpi_disable_event); |
1da177e4 LT |
238 | |
239 | /* Decode the Fixed Event */ | |
240 | ||
241 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 242 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
243 | } |
244 | ||
245 | /* | |
9f15fc66 BM |
246 | * Disable the requested fixed event (by writing a zero to the enable |
247 | * register bit) | |
1da177e4 | 248 | */ |
4be44fcd | 249 | status = |
50ffba1b | 250 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 251 | enable_register_id, ACPI_DISABLE_EVENT); |
4be44fcd LB |
252 | if (ACPI_FAILURE(status)) { |
253 | return_ACPI_STATUS(status); | |
1da177e4 LT |
254 | } |
255 | ||
4be44fcd | 256 | status = |
50ffba1b BM |
257 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
258 | enable_register_id, &value); | |
4be44fcd LB |
259 | if (ACPI_FAILURE(status)) { |
260 | return_ACPI_STATUS(status); | |
1da177e4 LT |
261 | } |
262 | ||
263 | if (value != 0) { | |
b8e4d893 BM |
264 | ACPI_ERROR((AE_INFO, |
265 | "Could not disable %s events", | |
266 | acpi_ut_get_event_name(event))); | |
4be44fcd | 267 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
268 | } |
269 | ||
4be44fcd | 270 | return_ACPI_STATUS(status); |
1da177e4 | 271 | } |
1da177e4 | 272 | |
8313524a | 273 | ACPI_EXPORT_SYMBOL(acpi_disable_event) |
1da177e4 LT |
274 | |
275 | /******************************************************************************* | |
276 | * | |
277 | * FUNCTION: acpi_clear_event | |
278 | * | |
ba494bee | 279 | * PARAMETERS: event - The fixed event to be cleared |
1da177e4 LT |
280 | * |
281 | * RETURN: Status | |
282 | * | |
283 | * DESCRIPTION: Clear an ACPI event (fixed) | |
284 | * | |
285 | ******************************************************************************/ | |
4be44fcd | 286 | acpi_status acpi_clear_event(u32 event) |
1da177e4 | 287 | { |
4be44fcd | 288 | acpi_status status = AE_OK; |
1da177e4 | 289 | |
b229cf92 | 290 | ACPI_FUNCTION_TRACE(acpi_clear_event); |
1da177e4 LT |
291 | |
292 | /* Decode the Fixed Event */ | |
293 | ||
294 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 295 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
296 | } |
297 | ||
298 | /* | |
9f15fc66 BM |
299 | * Clear the requested fixed event (By writing a one to the status |
300 | * register bit) | |
1da177e4 | 301 | */ |
4be44fcd | 302 | status = |
50ffba1b | 303 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 304 | status_register_id, ACPI_CLEAR_STATUS); |
1da177e4 | 305 | |
4be44fcd | 306 | return_ACPI_STATUS(status); |
1da177e4 | 307 | } |
1da177e4 | 308 | |
8313524a | 309 | ACPI_EXPORT_SYMBOL(acpi_clear_event) |
1da177e4 | 310 | |
1da177e4 LT |
311 | /******************************************************************************* |
312 | * | |
313 | * FUNCTION: acpi_get_event_status | |
314 | * | |
ba494bee | 315 | * PARAMETERS: event - The fixed event |
44f6c012 | 316 | * event_status - Where the current status of the event will |
1da177e4 LT |
317 | * be returned |
318 | * | |
319 | * RETURN: Status | |
320 | * | |
321 | * DESCRIPTION: Obtains and returns the current status of the event | |
322 | * | |
323 | ******************************************************************************/ | |
4be44fcd | 324 | acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status) |
1da177e4 | 325 | { |
4be44fcd | 326 | acpi_status status = AE_OK; |
71b58cbb | 327 | u32 value; |
1da177e4 | 328 | |
b229cf92 | 329 | ACPI_FUNCTION_TRACE(acpi_get_event_status); |
1da177e4 LT |
330 | |
331 | if (!event_status) { | |
4be44fcd | 332 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
333 | } |
334 | ||
335 | /* Decode the Fixed Event */ | |
336 | ||
337 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 338 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
339 | } |
340 | ||
341 | /* Get the status of the requested fixed event */ | |
342 | ||
4be44fcd | 343 | status = |
50ffba1b | 344 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
71b58cbb ZR |
345 | enable_register_id, &value); |
346 | if (ACPI_FAILURE(status)) | |
347 | return_ACPI_STATUS(status); | |
348 | ||
349 | *event_status = value; | |
350 | ||
351 | status = | |
50ffba1b | 352 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
71b58cbb ZR |
353 | status_register_id, &value); |
354 | if (ACPI_FAILURE(status)) | |
355 | return_ACPI_STATUS(status); | |
356 | ||
357 | if (value) | |
358 | *event_status |= ACPI_EVENT_FLAG_SET; | |
1da177e4 | 359 | |
ed206fac ZR |
360 | if (acpi_gbl_fixed_event_handlers[event].handler) |
361 | *event_status |= ACPI_EVENT_FLAG_HANDLE; | |
362 | ||
4be44fcd | 363 | return_ACPI_STATUS(status); |
1da177e4 LT |
364 | } |
365 | ||
8313524a | 366 | ACPI_EXPORT_SYMBOL(acpi_get_event_status) |
33620c54 | 367 | #endif /* !ACPI_REDUCED_HARDWARE */ |