blob: 3048801a37b5e1e91dfd6a7595b560cfe27531c2 [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 Moore6c9deb72007-02-02 19:48:24 +03008 * Copyright (C) 2000 - 2007, R. Byron Moore
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>
45#include <acpi/acevents.h>
46
47#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040048ACPI_MODULE_NAME("evevent")
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Robert Moore44f6c012005-04-18 22:49:35 -040050/* Local prototypes */
Len Brown4be44fc2005-08-05 00:44:28 -040051static acpi_status acpi_ev_fixed_event_initialize(void);
Robert Moore44f6c012005-04-18 22:49:35 -040052
Len Brown4be44fc2005-08-05 00:44:28 -040053static u32 acpi_ev_fixed_event_dispatch(u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55/*******************************************************************************
56 *
57 * FUNCTION: acpi_ev_initialize_events
58 *
59 * PARAMETERS: None
60 *
61 * RETURN: Status
62 *
Robert Moore44f6c012005-04-18 22:49:35 -040063 * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 *
65 ******************************************************************************/
66
Len Brown4be44fc2005-08-05 00:44:28 -040067acpi_status acpi_ev_initialize_events(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
Len Brown4be44fc2005-08-05 00:44:28 -040069 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Bob Mooreb229cf92006-04-21 17:15:00 -040071 ACPI_FUNCTION_TRACE(ev_initialize_events);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 /*
Robert Moore44f6c012005-04-18 22:49:35 -040074 * Initialize the Fixed and General Purpose Events. This is done prior to
75 * enabling SCIs to prevent interrupts from occurring before the handlers are
76 * installed.
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 */
Len Brown4be44fc2005-08-05 00:44:28 -040078 status = acpi_ev_fixed_event_initialize();
79 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -050080 ACPI_EXCEPTION((AE_INFO, status,
81 "Unable to initialize fixed events"));
Len Brown4be44fc2005-08-05 00:44:28 -040082 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 }
84
Len Brown4be44fc2005-08-05 00:44:28 -040085 status = acpi_ev_gpe_initialize();
86 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -050087 ACPI_EXCEPTION((AE_INFO, status,
88 "Unable to initialize general purpose events"));
Len Brown4be44fc2005-08-05 00:44:28 -040089 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 }
91
Len Brown4be44fc2005-08-05 00:44:28 -040092 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093}
94
Linus Torvalds1da177e2005-04-16 15:20:36 -070095/*******************************************************************************
96 *
Bob Moore96db2552005-11-02 00:00:00 -050097 * FUNCTION: acpi_ev_install_fadt_gpes
98 *
99 * PARAMETERS: None
100 *
101 * RETURN: Status
102 *
103 * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
104 * (0 and 1). This causes the _PRW methods to be run, so the HW
105 * must be fully initialized at this point, including global lock
106 * support.
107 *
108 ******************************************************************************/
109
110acpi_status acpi_ev_install_fadt_gpes(void)
111{
112 acpi_status status;
113
Bob Mooreb229cf92006-04-21 17:15:00 -0400114 ACPI_FUNCTION_TRACE(ev_install_fadt_gpes);
Bob Moore96db2552005-11-02 00:00:00 -0500115
116 /* Namespace must be locked */
117
118 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
119 if (ACPI_FAILURE(status)) {
120 return (status);
121 }
122
123 /* FADT GPE Block 0 */
124
125 (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
126 acpi_gbl_gpe_fadt_blocks[0]);
127
128 /* FADT GPE Block 1 */
129
130 (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
131 acpi_gbl_gpe_fadt_blocks[1]);
132
133 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
134 return_ACPI_STATUS(AE_OK);
135}
136
137/*******************************************************************************
138 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 * FUNCTION: acpi_ev_install_xrupt_handlers
140 *
141 * PARAMETERS: None
142 *
143 * RETURN: Status
144 *
145 * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
146 *
147 ******************************************************************************/
148
Len Brown4be44fc2005-08-05 00:44:28 -0400149acpi_status acpi_ev_install_xrupt_handlers(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150{
Len Brown4be44fc2005-08-05 00:44:28 -0400151 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Bob Mooreb229cf92006-04-21 17:15:00 -0400153 ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 /* Install the SCI handler */
156
Len Brown4be44fc2005-08-05 00:44:28 -0400157 status = acpi_ev_install_sci_handler();
158 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500159 ACPI_EXCEPTION((AE_INFO, status,
160 "Unable to install System Control Interrupt handler"));
Len Brown4be44fc2005-08-05 00:44:28 -0400161 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 }
163
164 /* Install the handler for the Global Lock */
165
Len Brown4be44fc2005-08-05 00:44:28 -0400166 status = acpi_ev_init_global_lock_handler();
167 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500168 ACPI_EXCEPTION((AE_INFO, status,
169 "Unable to initialize Global Lock handler"));
Len Brown4be44fc2005-08-05 00:44:28 -0400170 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
172
173 acpi_gbl_events_initialized = TRUE;
Len Brown4be44fc2005-08-05 00:44:28 -0400174 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175}
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177/*******************************************************************************
178 *
179 * FUNCTION: acpi_ev_fixed_event_initialize
180 *
181 * PARAMETERS: None
182 *
183 * RETURN: Status
184 *
185 * DESCRIPTION: Install the fixed event handlers and enable the fixed events.
186 *
187 ******************************************************************************/
188
Len Brown4be44fc2005-08-05 00:44:28 -0400189static acpi_status acpi_ev_fixed_event_initialize(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{
Len Brown4be44fc2005-08-05 00:44:28 -0400191 acpi_native_uint i;
192 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194 /*
195 * Initialize the structure that keeps track of fixed event handlers
196 * and enable the fixed events.
197 */
198 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
199 acpi_gbl_fixed_event_handlers[i].handler = NULL;
200 acpi_gbl_fixed_event_handlers[i].context = NULL;
201
202 /* Enable the fixed event */
203
204 if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
Len Brown4be44fc2005-08-05 00:44:28 -0400205 status =
206 acpi_set_register(acpi_gbl_fixed_event_info[i].
Bob Moored8c71b62007-02-02 19:48:21 +0300207 enable_register_id, 0);
Len Brown4be44fc2005-08-05 00:44:28 -0400208 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 return (status);
210 }
211 }
212 }
213
214 return (AE_OK);
215}
216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217/*******************************************************************************
218 *
219 * FUNCTION: acpi_ev_fixed_event_detect
220 *
221 * PARAMETERS: None
222 *
223 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
224 *
Robert Moore44f6c012005-04-18 22:49:35 -0400225 * DESCRIPTION: Checks the PM status register for active fixed events
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 *
227 ******************************************************************************/
228
Len Brown4be44fc2005-08-05 00:44:28 -0400229u32 acpi_ev_fixed_event_detect(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Len Brown4be44fc2005-08-05 00:44:28 -0400231 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
232 u32 fixed_status;
233 u32 fixed_enable;
234 acpi_native_uint i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Bob Mooreb229cf92006-04-21 17:15:00 -0400236 ACPI_FUNCTION_NAME(ev_fixed_event_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238 /*
239 * Read the fixed feature status and enable registers, as all the cases
240 * depend on their values. Ignore errors here.
241 */
Alexey Starikovskiyd30dc9ab2007-09-30 22:39:36 +0400242 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
243 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Len Brown4be44fc2005-08-05 00:44:28 -0400245 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
246 "Fixed Event Block: Enable %08X Status %08X\n",
247 fixed_enable, fixed_status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249 /*
250 * Check for all possible Fixed Events and dispatch those that are active
251 */
252 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 /* Both the status and enable bits must be on for this event */
255
Len Brown4be44fc2005-08-05 00:44:28 -0400256 if ((fixed_status & acpi_gbl_fixed_event_info[i].
257 status_bit_mask)
258 && (fixed_enable & acpi_gbl_fixed_event_info[i].
259 enable_bit_mask)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 /* Found an active (signalled) event */
Len Brown5229e872008-02-06 01:26:55 -0500262 acpi_os_fixed_event_count(i);
Len Brown4be44fc2005-08-05 00:44:28 -0400263 int_status |= acpi_ev_fixed_event_dispatch((u32) i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 }
265 }
266
267 return (int_status);
268}
269
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270/*******************************************************************************
271 *
272 * FUNCTION: acpi_ev_fixed_event_dispatch
273 *
274 * PARAMETERS: Event - Event type
275 *
276 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
277 *
278 * DESCRIPTION: Clears the status bit for the requested event, calls the
279 * handler that previously registered for the event.
280 *
281 ******************************************************************************/
282
Len Brown4be44fc2005-08-05 00:44:28 -0400283static u32 acpi_ev_fixed_event_dispatch(u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
285
Len Brown4be44fc2005-08-05 00:44:28 -0400286 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
288 /* Clear the status bit */
289
Len Brown4be44fc2005-08-05 00:44:28 -0400290 (void)acpi_set_register(acpi_gbl_fixed_event_info[event].
Bob Moored8c71b62007-02-02 19:48:21 +0300291 status_register_id, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293 /*
294 * Make sure we've got a handler. If not, report an error.
295 * The event is disabled to prevent further interrupts.
296 */
297 if (NULL == acpi_gbl_fixed_event_handlers[event].handler) {
Len Brown4be44fc2005-08-05 00:44:28 -0400298 (void)acpi_set_register(acpi_gbl_fixed_event_info[event].
Bob Moored8c71b62007-02-02 19:48:21 +0300299 enable_register_id, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Bob Mooreb8e4d892006-01-27 16:43:00 -0500301 ACPI_ERROR((AE_INFO,
302 "No installed handler for fixed event [%08X]",
303 event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305 return (ACPI_INTERRUPT_NOT_HANDLED);
306 }
307
308 /* Invoke the Fixed Event handler */
309
Len Brown4be44fc2005-08-05 00:44:28 -0400310 return ((acpi_gbl_fixed_event_handlers[event].
311 handler) (acpi_gbl_fixed_event_handlers[event].context));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}