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1/******************************************************************************
2 *
3 * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, Intel Corp.
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
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "actables.h"
47
48#define _COMPONENT ACPI_EVENTS
49ACPI_MODULE_NAME("evxfevnt")
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 ******************************************************************************/
62
63acpi_status acpi_enable(void)
64{
65 acpi_status status;
66 int retry;
67
68 ACPI_FUNCTION_TRACE(acpi_enable);
69
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
78 if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
79 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
80 "System is already in ACPI mode\n"));
81 return_ACPI_STATUS(AE_OK);
82 }
83
84 /* Transition to ACPI mode */
85
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
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 */
103 }
104
105 ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode"));
106 return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
107}
108
109ACPI_EXPORT_SYMBOL(acpi_enable)
110
111/*******************************************************************************
112 *
113 * FUNCTION: acpi_disable
114 *
115 * PARAMETERS: None
116 *
117 * RETURN: Status
118 *
119 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
120 *
121 ******************************************************************************/
122acpi_status acpi_disable(void)
123{
124 acpi_status status = AE_OK;
125
126 ACPI_FUNCTION_TRACE(acpi_disable);
127
128 if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
129 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
130 "System is already in legacy (non-ACPI) mode\n"));
131 } else {
132 /* Transition to LEGACY mode */
133
134 status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY);
135
136 if (ACPI_FAILURE(status)) {
137 ACPI_ERROR((AE_INFO,
138 "Could not exit ACPI mode to legacy mode"));
139 return_ACPI_STATUS(status);
140 }
141
142 ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n"));
143 }
144
145 return_ACPI_STATUS(status);
146}
147
148ACPI_EXPORT_SYMBOL(acpi_disable)
149
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 ******************************************************************************/
162acpi_status acpi_enable_event(u32 event, u32 flags)
163{
164 acpi_status status = AE_OK;
165 u32 value;
166
167 ACPI_FUNCTION_TRACE(acpi_enable_event);
168
169 /* Decode the Fixed Event */
170
171 if (event > ACPI_EVENT_MAX) {
172 return_ACPI_STATUS(AE_BAD_PARAMETER);
173 }
174
175 /*
176 * Enable the requested fixed event (by writing a one to the enable
177 * register bit)
178 */
179 status =
180 acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
181 enable_register_id, ACPI_ENABLE_EVENT);
182 if (ACPI_FAILURE(status)) {
183 return_ACPI_STATUS(status);
184 }
185
186 /* Make sure that the hardware responded */
187
188 status =
189 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
190 enable_register_id, &value);
191 if (ACPI_FAILURE(status)) {
192 return_ACPI_STATUS(status);
193 }
194
195 if (value != 1) {
196 ACPI_ERROR((AE_INFO,
197 "Could not enable %s event",
198 acpi_ut_get_event_name(event)));
199 return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
200 }
201
202 return_ACPI_STATUS(status);
203}
204
205ACPI_EXPORT_SYMBOL(acpi_enable_event)
206
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 ******************************************************************************/
219acpi_status acpi_disable_event(u32 event, u32 flags)
220{
221 acpi_status status = AE_OK;
222 u32 value;
223
224 ACPI_FUNCTION_TRACE(acpi_disable_event);
225
226 /* Decode the Fixed Event */
227
228 if (event > ACPI_EVENT_MAX) {
229 return_ACPI_STATUS(AE_BAD_PARAMETER);
230 }
231
232 /*
233 * Disable the requested fixed event (by writing a zero to the enable
234 * register bit)
235 */
236 status =
237 acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
238 enable_register_id, ACPI_DISABLE_EVENT);
239 if (ACPI_FAILURE(status)) {
240 return_ACPI_STATUS(status);
241 }
242
243 status =
244 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
245 enable_register_id, &value);
246 if (ACPI_FAILURE(status)) {
247 return_ACPI_STATUS(status);
248 }
249
250 if (value != 0) {
251 ACPI_ERROR((AE_INFO,
252 "Could not disable %s events",
253 acpi_ut_get_event_name(event)));
254 return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
255 }
256
257 return_ACPI_STATUS(status);
258}
259
260ACPI_EXPORT_SYMBOL(acpi_disable_event)
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 ******************************************************************************/
273acpi_status acpi_clear_event(u32 event)
274{
275 acpi_status status = AE_OK;
276
277 ACPI_FUNCTION_TRACE(acpi_clear_event);
278
279 /* Decode the Fixed Event */
280
281 if (event > ACPI_EVENT_MAX) {
282 return_ACPI_STATUS(AE_BAD_PARAMETER);
283 }
284
285 /*
286 * Clear the requested fixed event (By writing a one to the status
287 * register bit)
288 */
289 status =
290 acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
291 status_register_id, ACPI_CLEAR_STATUS);
292
293 return_ACPI_STATUS(status);
294}
295
296ACPI_EXPORT_SYMBOL(acpi_clear_event)
297
298/*******************************************************************************
299 *
300 * FUNCTION: acpi_get_event_status
301 *
302 * PARAMETERS: Event - The fixed event
303 * event_status - Where the current status of the event will
304 * be returned
305 *
306 * RETURN: Status
307 *
308 * DESCRIPTION: Obtains and returns the current status of the event
309 *
310 ******************************************************************************/
311acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
312{
313 acpi_status status = AE_OK;
314 u32 value;
315
316 ACPI_FUNCTION_TRACE(acpi_get_event_status);
317
318 if (!event_status) {
319 return_ACPI_STATUS(AE_BAD_PARAMETER);
320 }
321
322 /* Decode the Fixed Event */
323
324 if (event > ACPI_EVENT_MAX) {
325 return_ACPI_STATUS(AE_BAD_PARAMETER);
326 }
327
328 /* Get the status of the requested fixed event */
329
330 status =
331 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
332 enable_register_id, &value);
333 if (ACPI_FAILURE(status))
334 return_ACPI_STATUS(status);
335
336 *event_status = value;
337
338 status =
339 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
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;
346
347 if (acpi_gbl_fixed_event_handlers[event].handler)
348 *event_status |= ACPI_EVENT_FLAG_HANDLE;
349
350 return_ACPI_STATUS(status);
351}
352
353ACPI_EXPORT_SYMBOL(acpi_get_event_status)
1/******************************************************************************
2 *
3 * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, Intel Corp.
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
44#include <linux/export.h>
45#include <acpi/acpi.h>
46#include "accommon.h"
47#include "actables.h"
48
49#define _COMPONENT ACPI_EVENTS
50ACPI_MODULE_NAME("evxfevnt")
51
52#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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 ******************************************************************************/
64
65acpi_status acpi_enable(void)
66{
67 acpi_status status;
68 int retry;
69
70 ACPI_FUNCTION_TRACE(acpi_enable);
71
72 /* ACPI tables must be present */
73
74 if (!acpi_tb_tables_loaded()) {
75 return_ACPI_STATUS(AE_NO_ACPI_TABLES);
76 }
77
78 /* Check current mode */
79
80 if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
81 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
82 "System is already in ACPI mode\n"));
83 return_ACPI_STATUS(AE_OK);
84 }
85
86 /* Transition to ACPI mode */
87
88 status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI);
89 if (ACPI_FAILURE(status)) {
90 ACPI_ERROR((AE_INFO,
91 "Could not transition to ACPI mode"));
92 return_ACPI_STATUS(status);
93 }
94
95 /* Sanity check that transition succeeded */
96
97 for (retry = 0; retry < 30000; ++retry) {
98 if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
99 if (retry != 0)
100 ACPI_WARNING((AE_INFO,
101 "Platform took > %d00 usec to enter ACPI mode", retry));
102 return_ACPI_STATUS(AE_OK);
103 }
104 acpi_os_stall(100); /* 100 usec */
105 }
106
107 ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode"));
108 return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
109}
110
111ACPI_EXPORT_SYMBOL(acpi_enable)
112
113/*******************************************************************************
114 *
115 * FUNCTION: acpi_disable
116 *
117 * PARAMETERS: None
118 *
119 * RETURN: Status
120 *
121 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
122 *
123 ******************************************************************************/
124acpi_status acpi_disable(void)
125{
126 acpi_status status = AE_OK;
127
128 ACPI_FUNCTION_TRACE(acpi_disable);
129
130 if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
131 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
132 "System is already in legacy (non-ACPI) mode\n"));
133 } else {
134 /* Transition to LEGACY mode */
135
136 status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY);
137
138 if (ACPI_FAILURE(status)) {
139 ACPI_ERROR((AE_INFO,
140 "Could not exit ACPI mode to legacy mode"));
141 return_ACPI_STATUS(status);
142 }
143
144 ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n"));
145 }
146
147 return_ACPI_STATUS(status);
148}
149
150ACPI_EXPORT_SYMBOL(acpi_disable)
151
152/*******************************************************************************
153 *
154 * FUNCTION: acpi_enable_event
155 *
156 * PARAMETERS: Event - The fixed eventto be enabled
157 * Flags - Reserved
158 *
159 * RETURN: Status
160 *
161 * DESCRIPTION: Enable an ACPI event (fixed)
162 *
163 ******************************************************************************/
164acpi_status acpi_enable_event(u32 event, u32 flags)
165{
166 acpi_status status = AE_OK;
167 u32 value;
168
169 ACPI_FUNCTION_TRACE(acpi_enable_event);
170
171 /* Decode the Fixed Event */
172
173 if (event > ACPI_EVENT_MAX) {
174 return_ACPI_STATUS(AE_BAD_PARAMETER);
175 }
176
177 /*
178 * Enable the requested fixed event (by writing a one to the enable
179 * register bit)
180 */
181 status =
182 acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
183 enable_register_id, ACPI_ENABLE_EVENT);
184 if (ACPI_FAILURE(status)) {
185 return_ACPI_STATUS(status);
186 }
187
188 /* Make sure that the hardware responded */
189
190 status =
191 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
192 enable_register_id, &value);
193 if (ACPI_FAILURE(status)) {
194 return_ACPI_STATUS(status);
195 }
196
197 if (value != 1) {
198 ACPI_ERROR((AE_INFO,
199 "Could not enable %s event",
200 acpi_ut_get_event_name(event)));
201 return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
202 }
203
204 return_ACPI_STATUS(status);
205}
206
207ACPI_EXPORT_SYMBOL(acpi_enable_event)
208
209/*******************************************************************************
210 *
211 * FUNCTION: acpi_disable_event
212 *
213 * PARAMETERS: Event - The fixed eventto be enabled
214 * Flags - Reserved
215 *
216 * RETURN: Status
217 *
218 * DESCRIPTION: Disable an ACPI event (fixed)
219 *
220 ******************************************************************************/
221acpi_status acpi_disable_event(u32 event, u32 flags)
222{
223 acpi_status status = AE_OK;
224 u32 value;
225
226 ACPI_FUNCTION_TRACE(acpi_disable_event);
227
228 /* Decode the Fixed Event */
229
230 if (event > ACPI_EVENT_MAX) {
231 return_ACPI_STATUS(AE_BAD_PARAMETER);
232 }
233
234 /*
235 * Disable the requested fixed event (by writing a zero to the enable
236 * register bit)
237 */
238 status =
239 acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
240 enable_register_id, ACPI_DISABLE_EVENT);
241 if (ACPI_FAILURE(status)) {
242 return_ACPI_STATUS(status);
243 }
244
245 status =
246 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
247 enable_register_id, &value);
248 if (ACPI_FAILURE(status)) {
249 return_ACPI_STATUS(status);
250 }
251
252 if (value != 0) {
253 ACPI_ERROR((AE_INFO,
254 "Could not disable %s events",
255 acpi_ut_get_event_name(event)));
256 return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
257 }
258
259 return_ACPI_STATUS(status);
260}
261
262ACPI_EXPORT_SYMBOL(acpi_disable_event)
263
264/*******************************************************************************
265 *
266 * FUNCTION: acpi_clear_event
267 *
268 * PARAMETERS: Event - The fixed event to be cleared
269 *
270 * RETURN: Status
271 *
272 * DESCRIPTION: Clear an ACPI event (fixed)
273 *
274 ******************************************************************************/
275acpi_status acpi_clear_event(u32 event)
276{
277 acpi_status status = AE_OK;
278
279 ACPI_FUNCTION_TRACE(acpi_clear_event);
280
281 /* Decode the Fixed Event */
282
283 if (event > ACPI_EVENT_MAX) {
284 return_ACPI_STATUS(AE_BAD_PARAMETER);
285 }
286
287 /*
288 * Clear the requested fixed event (By writing a one to the status
289 * register bit)
290 */
291 status =
292 acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
293 status_register_id, ACPI_CLEAR_STATUS);
294
295 return_ACPI_STATUS(status);
296}
297
298ACPI_EXPORT_SYMBOL(acpi_clear_event)
299
300/*******************************************************************************
301 *
302 * FUNCTION: acpi_get_event_status
303 *
304 * PARAMETERS: Event - The fixed event
305 * event_status - Where the current status of the event will
306 * be returned
307 *
308 * RETURN: Status
309 *
310 * DESCRIPTION: Obtains and returns the current status of the event
311 *
312 ******************************************************************************/
313acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
314{
315 acpi_status status = AE_OK;
316 u32 value;
317
318 ACPI_FUNCTION_TRACE(acpi_get_event_status);
319
320 if (!event_status) {
321 return_ACPI_STATUS(AE_BAD_PARAMETER);
322 }
323
324 /* Decode the Fixed Event */
325
326 if (event > ACPI_EVENT_MAX) {
327 return_ACPI_STATUS(AE_BAD_PARAMETER);
328 }
329
330 /* Get the status of the requested fixed event */
331
332 status =
333 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
334 enable_register_id, &value);
335 if (ACPI_FAILURE(status))
336 return_ACPI_STATUS(status);
337
338 *event_status = value;
339
340 status =
341 acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
342 status_register_id, &value);
343 if (ACPI_FAILURE(status))
344 return_ACPI_STATUS(status);
345
346 if (value)
347 *event_status |= ACPI_EVENT_FLAG_SET;
348
349 if (acpi_gbl_fixed_event_handlers[event].handler)
350 *event_status |= ACPI_EVENT_FLAG_HANDLE;
351
352 return_ACPI_STATUS(status);
353}
354
355ACPI_EXPORT_SYMBOL(acpi_get_event_status)
356#endif /* !ACPI_REDUCED_HARDWARE */