blob: d458b041e6510aec0c91cd4b20c0080147975524 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: evevent - Fixed Event handling and dispatch
4 *
5 *****************************************************************************/
6
7/*
Bob Mooreb4e104e2011-01-17 11:05:40 +08008 * Copyright (C) 2000 - 2011, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acevents.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040049ACPI_MODULE_NAME("evevent")
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Robert Moore44f6c012005-04-18 22:49:35 -040051/* Local prototypes */
Len Brown4be44fc2005-08-05 00:44:28 -040052static acpi_status acpi_ev_fixed_event_initialize(void);
Robert Moore44f6c012005-04-18 22:49:35 -040053
Len Brown4be44fc2005-08-05 00:44:28 -040054static u32 acpi_ev_fixed_event_dispatch(u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56/*******************************************************************************
57 *
58 * FUNCTION: acpi_ev_initialize_events
59 *
60 * PARAMETERS: None
61 *
62 * RETURN: Status
63 *
Robert Moore44f6c012005-04-18 22:49:35 -040064 * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 *
66 ******************************************************************************/
67
Len Brown4be44fc2005-08-05 00:44:28 -040068acpi_status acpi_ev_initialize_events(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
Len Brown4be44fc2005-08-05 00:44:28 -040070 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Bob Mooreb229cf92006-04-21 17:15:00 -040072 ACPI_FUNCTION_TRACE(ev_initialize_events);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 /*
Robert Moore44f6c012005-04-18 22:49:35 -040075 * Initialize the Fixed and General Purpose Events. This is done prior to
Bob Moore9f15fc62008-11-12 16:01:56 +080076 * enabling SCIs to prevent interrupts from occurring before the handlers
77 * are installed.
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 */
Len Brown4be44fc2005-08-05 00:44:28 -040079 status = acpi_ev_fixed_event_initialize();
80 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -050081 ACPI_EXCEPTION((AE_INFO, status,
82 "Unable to initialize fixed events"));
Len Brown4be44fc2005-08-05 00:44:28 -040083 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 }
85
Len Brown4be44fc2005-08-05 00:44:28 -040086 status = acpi_ev_gpe_initialize();
87 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -050088 ACPI_EXCEPTION((AE_INFO, status,
89 "Unable to initialize general purpose events"));
Len Brown4be44fc2005-08-05 00:44:28 -040090 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 }
92
Len Brown4be44fc2005-08-05 00:44:28 -040093 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094}
95
Linus Torvalds1da177e2005-04-16 15:20:36 -070096/*******************************************************************************
97 *
98 * FUNCTION: acpi_ev_install_xrupt_handlers
99 *
100 * PARAMETERS: None
101 *
102 * RETURN: Status
103 *
104 * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
105 *
106 ******************************************************************************/
107
Len Brown4be44fc2005-08-05 00:44:28 -0400108acpi_status acpi_ev_install_xrupt_handlers(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109{
Len Brown4be44fc2005-08-05 00:44:28 -0400110 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Bob Mooreb229cf92006-04-21 17:15:00 -0400112 ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114 /* Install the SCI handler */
115
Len Brown4be44fc2005-08-05 00:44:28 -0400116 status = acpi_ev_install_sci_handler();
117 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500118 ACPI_EXCEPTION((AE_INFO, status,
119 "Unable to install System Control Interrupt handler"));
Len Brown4be44fc2005-08-05 00:44:28 -0400120 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 }
122
123 /* Install the handler for the Global Lock */
124
Len Brown4be44fc2005-08-05 00:44:28 -0400125 status = acpi_ev_init_global_lock_handler();
126 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500127 ACPI_EXCEPTION((AE_INFO, status,
128 "Unable to initialize Global Lock handler"));
Len Brown4be44fc2005-08-05 00:44:28 -0400129 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 }
131
132 acpi_gbl_events_initialized = TRUE;
Len Brown4be44fc2005-08-05 00:44:28 -0400133 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134}
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136/*******************************************************************************
137 *
138 * FUNCTION: acpi_ev_fixed_event_initialize
139 *
140 * PARAMETERS: None
141 *
142 * RETURN: Status
143 *
Bob Moore768aaaf2009-03-06 09:49:25 +0800144 * DESCRIPTION: Install the fixed event handlers and disable all fixed events.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 *
146 ******************************************************************************/
147
Len Brown4be44fc2005-08-05 00:44:28 -0400148static acpi_status acpi_ev_fixed_event_initialize(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Bob Moore67a119f2008-06-10 13:42:13 +0800150 u32 i;
Len Brown4be44fc2005-08-05 00:44:28 -0400151 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800154 * Initialize the structure that keeps track of fixed event handlers and
155 * enable the fixed events.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 */
157 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
158 acpi_gbl_fixed_event_handlers[i].handler = NULL;
159 acpi_gbl_fixed_event_handlers[i].context = NULL;
160
Bob Moore768aaaf2009-03-06 09:49:25 +0800161 /* Disable the fixed event */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
Len Brown4be44fc2005-08-05 00:44:28 -0400164 status =
Bob Moore50ffba12009-02-23 15:02:07 +0800165 acpi_write_bit_register(acpi_gbl_fixed_event_info
Bob Moore768aaaf2009-03-06 09:49:25 +0800166 [i].enable_register_id,
167 ACPI_DISABLE_EVENT);
Len Brown4be44fc2005-08-05 00:44:28 -0400168 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 return (status);
170 }
171 }
172 }
173
174 return (AE_OK);
175}
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177/*******************************************************************************
178 *
179 * FUNCTION: acpi_ev_fixed_event_detect
180 *
181 * PARAMETERS: None
182 *
183 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
184 *
Robert Moore44f6c012005-04-18 22:49:35 -0400185 * DESCRIPTION: Checks the PM status register for active fixed events
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 *
187 ******************************************************************************/
188
Len Brown4be44fc2005-08-05 00:44:28 -0400189u32 acpi_ev_fixed_event_detect(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{
Len Brown4be44fc2005-08-05 00:44:28 -0400191 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
192 u32 fixed_status;
193 u32 fixed_enable;
Bob Moore67a119f2008-06-10 13:42:13 +0800194 u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Bob Mooreb229cf92006-04-21 17:15:00 -0400196 ACPI_FUNCTION_NAME(ev_fixed_event_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198 /*
199 * Read the fixed feature status and enable registers, as all the cases
Bob Moore9f15fc62008-11-12 16:01:56 +0800200 * depend on their values. Ignore errors here.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 */
Alexey Starikovskiyd30dc9ab2007-09-30 22:39:36 +0400202 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
203 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Len Brown4be44fc2005-08-05 00:44:28 -0400205 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
206 "Fixed Event Block: Enable %08X Status %08X\n",
207 fixed_enable, fixed_status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209 /*
210 * Check for all possible Fixed Events and dispatch those that are active
211 */
212 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 /* Both the status and enable bits must be on for this event */
215
Len Brown4be44fc2005-08-05 00:44:28 -0400216 if ((fixed_status & acpi_gbl_fixed_event_info[i].
217 status_bit_mask)
218 && (fixed_enable & acpi_gbl_fixed_event_info[i].
219 enable_bit_mask)) {
Lin Minga0fcdb22010-12-13 13:39:26 +0800220 /*
221 * Found an active (signalled) event. Invoke global event
222 * handler if present.
223 */
224 acpi_fixed_event_count[i]++;
225 if (acpi_gbl_global_event_handler) {
226 acpi_gbl_global_event_handler
227 (ACPI_EVENT_TYPE_FIXED, NULL, i,
228 acpi_gbl_global_event_handler_context);
229 }
Bob Moore52fc0b02006-10-02 00:00:00 -0400230
Bob Moore67a119f2008-06-10 13:42:13 +0800231 int_status |= acpi_ev_fixed_event_dispatch(i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 }
233 }
234
235 return (int_status);
236}
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238/*******************************************************************************
239 *
240 * FUNCTION: acpi_ev_fixed_event_dispatch
241 *
242 * PARAMETERS: Event - Event type
243 *
244 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
245 *
246 * DESCRIPTION: Clears the status bit for the requested event, calls the
247 * handler that previously registered for the event.
248 *
249 ******************************************************************************/
250
Len Brown4be44fc2005-08-05 00:44:28 -0400251static u32 acpi_ev_fixed_event_dispatch(u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
253
Len Brown4be44fc2005-08-05 00:44:28 -0400254 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
256 /* Clear the status bit */
257
Bob Moore50ffba12009-02-23 15:02:07 +0800258 (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
Bob Moore768aaaf2009-03-06 09:49:25 +0800259 status_register_id, ACPI_CLEAR_STATUS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800262 * Make sure we've got a handler. If not, report an error. The event is
263 * disabled to prevent further interrupts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 */
265 if (NULL == acpi_gbl_fixed_event_handlers[event].handler) {
Bob Moore50ffba12009-02-23 15:02:07 +0800266 (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
Bob Moore768aaaf2009-03-06 09:49:25 +0800267 enable_register_id,
268 ACPI_DISABLE_EVENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
Bob Mooreb8e4d892006-01-27 16:43:00 -0500270 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800271 "No installed handler for fixed event [0x%08X]",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500272 event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274 return (ACPI_INTERRUPT_NOT_HANDLED);
275 }
276
277 /* Invoke the Fixed Event handler */
278
Len Brown4be44fc2005-08-05 00:44:28 -0400279 return ((acpi_gbl_fixed_event_handlers[event].
280 handler) (acpi_gbl_fixed_event_handlers[event].context));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}