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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
da6f8320 | 8 | * Copyright (C) 2000 - 2018, 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 | ||
839e928f LZ |
44 | #define EXPORT_ACPI_INTERFACES |
45 | ||
1da177e4 | 46 | #include <acpi/acpi.h> |
e2f7a777 | 47 | #include "accommon.h" |
e2f7a777 | 48 | #include "actables.h" |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 51 | ACPI_MODULE_NAME("evxfevnt") |
1da177e4 | 52 | |
33620c54 | 53 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
1da177e4 LT |
54 | /******************************************************************************* |
55 | * | |
56 | * FUNCTION: acpi_enable | |
57 | * | |
58 | * PARAMETERS: None | |
59 | * | |
60 | * RETURN: Status | |
61 | * | |
62 | * DESCRIPTION: Transfers the system into ACPI mode. | |
63 | * | |
64 | ******************************************************************************/ | |
4be44fcd | 65 | acpi_status acpi_enable(void) |
1da177e4 | 66 | { |
b430acbd | 67 | acpi_status status; |
3d695839 | 68 | int retry; |
1da177e4 | 69 | |
b229cf92 | 70 | ACPI_FUNCTION_TRACE(acpi_enable); |
1da177e4 | 71 | |
c857303a BM |
72 | /* ACPI tables must be present */ |
73 | ||
62fcce91 | 74 | if (acpi_gbl_fadt_index == ACPI_INVALID_TABLE_INDEX) { |
c857303a BM |
75 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
76 | } | |
77 | ||
c39660b2 BM |
78 | /* If the Hardware Reduced flag is set, machine is always in acpi mode */ |
79 | ||
80 | if (acpi_gbl_reduced_hardware) { | |
81 | return_ACPI_STATUS(AE_OK); | |
82 | } | |
83 | ||
c857303a BM |
84 | /* Check current mode */ |
85 | ||
1da177e4 | 86 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
4be44fcd LB |
87 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
88 | "System is already in ACPI mode\n")); | |
b430acbd LB |
89 | return_ACPI_STATUS(AE_OK); |
90 | } | |
1da177e4 | 91 | |
b430acbd | 92 | /* Transition to ACPI mode */ |
1da177e4 | 93 | |
b430acbd LB |
94 | status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
95 | if (ACPI_FAILURE(status)) { | |
96 | ACPI_ERROR((AE_INFO, | |
97 | "Could not transition to ACPI mode")); | |
98 | return_ACPI_STATUS(status); | |
99 | } | |
100 | ||
101 | /* Sanity check that transition succeeded */ | |
102 | ||
3d695839 LB |
103 | for (retry = 0; retry < 30000; ++retry) { |
104 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { | |
105 | if (retry != 0) | |
106 | ACPI_WARNING((AE_INFO, | |
107 | "Platform took > %d00 usec to enter ACPI mode", retry)); | |
108 | return_ACPI_STATUS(AE_OK); | |
109 | } | |
110 | acpi_os_stall(100); /* 100 usec */ | |
1da177e4 LT |
111 | } |
112 | ||
3d695839 LB |
113 | ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode")); |
114 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); | |
1da177e4 LT |
115 | } |
116 | ||
8313524a BM |
117 | ACPI_EXPORT_SYMBOL(acpi_enable) |
118 | ||
1da177e4 LT |
119 | /******************************************************************************* |
120 | * | |
121 | * FUNCTION: acpi_disable | |
122 | * | |
123 | * PARAMETERS: None | |
124 | * | |
125 | * RETURN: Status | |
126 | * | |
44f6c012 | 127 | * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. |
1da177e4 LT |
128 | * |
129 | ******************************************************************************/ | |
4be44fcd | 130 | acpi_status acpi_disable(void) |
1da177e4 | 131 | { |
4be44fcd | 132 | acpi_status status = AE_OK; |
1da177e4 | 133 | |
b229cf92 | 134 | ACPI_FUNCTION_TRACE(acpi_disable); |
1da177e4 | 135 | |
c39660b2 BM |
136 | /* If the Hardware Reduced flag is set, machine is always in acpi mode */ |
137 | ||
138 | if (acpi_gbl_reduced_hardware) { | |
139 | return_ACPI_STATUS(AE_OK); | |
140 | } | |
141 | ||
1da177e4 | 142 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { |
4be44fcd LB |
143 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
144 | "System is already in legacy (non-ACPI) mode\n")); | |
145 | } else { | |
1da177e4 LT |
146 | /* Transition to LEGACY mode */ |
147 | ||
4be44fcd | 148 | status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
1da177e4 | 149 | |
4be44fcd | 150 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
151 | ACPI_ERROR((AE_INFO, |
152 | "Could not exit ACPI mode to legacy mode")); | |
4be44fcd | 153 | return_ACPI_STATUS(status); |
1da177e4 LT |
154 | } |
155 | ||
4be44fcd | 156 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
1da177e4 LT |
157 | } |
158 | ||
4be44fcd | 159 | return_ACPI_STATUS(status); |
1da177e4 LT |
160 | } |
161 | ||
8313524a BM |
162 | ACPI_EXPORT_SYMBOL(acpi_disable) |
163 | ||
1da177e4 LT |
164 | /******************************************************************************* |
165 | * | |
166 | * FUNCTION: acpi_enable_event | |
167 | * | |
ba494bee BM |
168 | * PARAMETERS: event - The fixed eventto be enabled |
169 | * flags - Reserved | |
1da177e4 LT |
170 | * |
171 | * RETURN: Status | |
172 | * | |
173 | * DESCRIPTION: Enable an ACPI event (fixed) | |
174 | * | |
175 | ******************************************************************************/ | |
4be44fcd | 176 | acpi_status acpi_enable_event(u32 event, u32 flags) |
1da177e4 | 177 | { |
4be44fcd LB |
178 | acpi_status status = AE_OK; |
179 | u32 value; | |
1da177e4 | 180 | |
b229cf92 | 181 | ACPI_FUNCTION_TRACE(acpi_enable_event); |
1da177e4 | 182 | |
861ba635 LZ |
183 | /* If Hardware Reduced flag is set, there are no fixed events */ |
184 | ||
185 | if (acpi_gbl_reduced_hardware) { | |
186 | return_ACPI_STATUS(AE_OK); | |
187 | } | |
188 | ||
1da177e4 LT |
189 | /* Decode the Fixed Event */ |
190 | ||
191 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 192 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
193 | } |
194 | ||
195 | /* | |
9f15fc66 BM |
196 | * Enable the requested fixed event (by writing a one to the enable |
197 | * register bit) | |
1da177e4 | 198 | */ |
4be44fcd | 199 | status = |
50ffba1b | 200 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 201 | enable_register_id, ACPI_ENABLE_EVENT); |
4be44fcd LB |
202 | if (ACPI_FAILURE(status)) { |
203 | return_ACPI_STATUS(status); | |
1da177e4 LT |
204 | } |
205 | ||
206 | /* Make sure that the hardware responded */ | |
207 | ||
4be44fcd | 208 | status = |
50ffba1b BM |
209 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
210 | enable_register_id, &value); | |
4be44fcd LB |
211 | if (ACPI_FAILURE(status)) { |
212 | return_ACPI_STATUS(status); | |
1da177e4 LT |
213 | } |
214 | ||
215 | if (value != 1) { | |
b8e4d893 BM |
216 | ACPI_ERROR((AE_INFO, |
217 | "Could not enable %s event", | |
218 | acpi_ut_get_event_name(event))); | |
4be44fcd | 219 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
220 | } |
221 | ||
4be44fcd | 222 | return_ACPI_STATUS(status); |
1da177e4 | 223 | } |
1da177e4 | 224 | |
8313524a | 225 | ACPI_EXPORT_SYMBOL(acpi_enable_event) |
1da177e4 | 226 | |
1da177e4 LT |
227 | /******************************************************************************* |
228 | * | |
229 | * FUNCTION: acpi_disable_event | |
230 | * | |
75c8044f LZ |
231 | * PARAMETERS: event - The fixed event to be disabled |
232 | * flags - Reserved | |
1da177e4 LT |
233 | * |
234 | * RETURN: Status | |
235 | * | |
236 | * DESCRIPTION: Disable an ACPI event (fixed) | |
237 | * | |
238 | ******************************************************************************/ | |
4be44fcd | 239 | acpi_status acpi_disable_event(u32 event, u32 flags) |
1da177e4 | 240 | { |
4be44fcd LB |
241 | acpi_status status = AE_OK; |
242 | u32 value; | |
1da177e4 | 243 | |
b229cf92 | 244 | ACPI_FUNCTION_TRACE(acpi_disable_event); |
1da177e4 | 245 | |
861ba635 LZ |
246 | /* If Hardware Reduced flag is set, there are no fixed events */ |
247 | ||
248 | if (acpi_gbl_reduced_hardware) { | |
249 | return_ACPI_STATUS(AE_OK); | |
250 | } | |
251 | ||
1da177e4 LT |
252 | /* Decode the Fixed Event */ |
253 | ||
254 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 255 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
256 | } |
257 | ||
258 | /* | |
9f15fc66 BM |
259 | * Disable the requested fixed event (by writing a zero to the enable |
260 | * register bit) | |
1da177e4 | 261 | */ |
4be44fcd | 262 | status = |
50ffba1b | 263 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 264 | enable_register_id, ACPI_DISABLE_EVENT); |
4be44fcd LB |
265 | if (ACPI_FAILURE(status)) { |
266 | return_ACPI_STATUS(status); | |
1da177e4 LT |
267 | } |
268 | ||
4be44fcd | 269 | status = |
50ffba1b BM |
270 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
271 | enable_register_id, &value); | |
4be44fcd LB |
272 | if (ACPI_FAILURE(status)) { |
273 | return_ACPI_STATUS(status); | |
1da177e4 LT |
274 | } |
275 | ||
276 | if (value != 0) { | |
b8e4d893 BM |
277 | ACPI_ERROR((AE_INFO, |
278 | "Could not disable %s events", | |
279 | acpi_ut_get_event_name(event))); | |
4be44fcd | 280 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
1da177e4 LT |
281 | } |
282 | ||
4be44fcd | 283 | return_ACPI_STATUS(status); |
1da177e4 | 284 | } |
1da177e4 | 285 | |
8313524a | 286 | ACPI_EXPORT_SYMBOL(acpi_disable_event) |
1da177e4 LT |
287 | |
288 | /******************************************************************************* | |
289 | * | |
290 | * FUNCTION: acpi_clear_event | |
291 | * | |
ba494bee | 292 | * PARAMETERS: event - The fixed event to be cleared |
1da177e4 LT |
293 | * |
294 | * RETURN: Status | |
295 | * | |
296 | * DESCRIPTION: Clear an ACPI event (fixed) | |
297 | * | |
298 | ******************************************************************************/ | |
4be44fcd | 299 | acpi_status acpi_clear_event(u32 event) |
1da177e4 | 300 | { |
4be44fcd | 301 | acpi_status status = AE_OK; |
1da177e4 | 302 | |
b229cf92 | 303 | ACPI_FUNCTION_TRACE(acpi_clear_event); |
1da177e4 | 304 | |
861ba635 LZ |
305 | /* If Hardware Reduced flag is set, there are no fixed events */ |
306 | ||
307 | if (acpi_gbl_reduced_hardware) { | |
308 | return_ACPI_STATUS(AE_OK); | |
309 | } | |
310 | ||
1da177e4 LT |
311 | /* Decode the Fixed Event */ |
312 | ||
313 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 314 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
315 | } |
316 | ||
317 | /* | |
9f15fc66 BM |
318 | * Clear the requested fixed event (By writing a one to the status |
319 | * register bit) | |
1da177e4 | 320 | */ |
4be44fcd | 321 | status = |
50ffba1b | 322 | acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 323 | status_register_id, ACPI_CLEAR_STATUS); |
1da177e4 | 324 | |
4be44fcd | 325 | return_ACPI_STATUS(status); |
1da177e4 | 326 | } |
1da177e4 | 327 | |
8313524a | 328 | ACPI_EXPORT_SYMBOL(acpi_clear_event) |
1da177e4 | 329 | |
1da177e4 LT |
330 | /******************************************************************************* |
331 | * | |
332 | * FUNCTION: acpi_get_event_status | |
333 | * | |
ba494bee | 334 | * PARAMETERS: event - The fixed event |
44f6c012 | 335 | * event_status - Where the current status of the event will |
1da177e4 LT |
336 | * be returned |
337 | * | |
338 | * RETURN: Status | |
339 | * | |
340 | * DESCRIPTION: Obtains and returns the current status of the event | |
341 | * | |
342 | ******************************************************************************/ | |
4be44fcd | 343 | acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status) |
1da177e4 | 344 | { |
a08f813e LZ |
345 | acpi_status status; |
346 | acpi_event_status local_event_status = 0; | |
347 | u32 in_byte; | |
1da177e4 | 348 | |
b229cf92 | 349 | ACPI_FUNCTION_TRACE(acpi_get_event_status); |
1da177e4 LT |
350 | |
351 | if (!event_status) { | |
4be44fcd | 352 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
353 | } |
354 | ||
355 | /* Decode the Fixed Event */ | |
356 | ||
357 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 358 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
359 | } |
360 | ||
a08f813e LZ |
361 | /* Fixed event currently can be dispatched? */ |
362 | ||
363 | if (acpi_gbl_fixed_event_handlers[event].handler) { | |
2f857234 | 364 | local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER; |
a08f813e LZ |
365 | } |
366 | ||
367 | /* Fixed event currently enabled? */ | |
1da177e4 | 368 | |
4be44fcd | 369 | status = |
50ffba1b | 370 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
a08f813e LZ |
371 | enable_register_id, &in_byte); |
372 | if (ACPI_FAILURE(status)) { | |
71b58cbb | 373 | return_ACPI_STATUS(status); |
a08f813e | 374 | } |
71b58cbb | 375 | |
a08f813e | 376 | if (in_byte) { |
09af8e82 LZ |
377 | local_event_status |= |
378 | (ACPI_EVENT_FLAG_ENABLED | ACPI_EVENT_FLAG_ENABLE_SET); | |
a08f813e LZ |
379 | } |
380 | ||
381 | /* Fixed event currently active? */ | |
71b58cbb ZR |
382 | |
383 | status = | |
50ffba1b | 384 | acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
a08f813e LZ |
385 | status_register_id, &in_byte); |
386 | if (ACPI_FAILURE(status)) { | |
71b58cbb | 387 | return_ACPI_STATUS(status); |
a08f813e | 388 | } |
71b58cbb | 389 | |
a08f813e | 390 | if (in_byte) { |
09af8e82 | 391 | local_event_status |= ACPI_EVENT_FLAG_STATUS_SET; |
a08f813e | 392 | } |
ed206fac | 393 | |
a08f813e LZ |
394 | (*event_status) = local_event_status; |
395 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
396 | } |
397 | ||
8313524a | 398 | ACPI_EXPORT_SYMBOL(acpi_get_event_status) |
33620c54 | 399 | #endif /* !ACPI_REDUCED_HARDWARE */ |