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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evevent - Fixed Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
a8357b0c | 8 | * Copyright (C) 2000 - 2010, 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 | ||
44 | #include <acpi/acpi.h> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
1da177e4 LT |
47 | |
48 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 49 | ACPI_MODULE_NAME("evevent") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
4be44fcd | 52 | static acpi_status acpi_ev_fixed_event_initialize(void); |
44f6c012 | 53 | |
4be44fcd | 54 | static u32 acpi_ev_fixed_event_dispatch(u32 event); |
1da177e4 LT |
55 | |
56 | /******************************************************************************* | |
57 | * | |
58 | * FUNCTION: acpi_ev_initialize_events | |
59 | * | |
60 | * PARAMETERS: None | |
61 | * | |
62 | * RETURN: Status | |
63 | * | |
44f6c012 | 64 | * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE) |
1da177e4 LT |
65 | * |
66 | ******************************************************************************/ | |
67 | ||
4be44fcd | 68 | acpi_status acpi_ev_initialize_events(void) |
1da177e4 | 69 | { |
4be44fcd | 70 | acpi_status status; |
1da177e4 | 71 | |
b229cf92 | 72 | ACPI_FUNCTION_TRACE(ev_initialize_events); |
1da177e4 | 73 | |
1da177e4 | 74 | /* |
44f6c012 | 75 | * Initialize the Fixed and General Purpose Events. This is done prior to |
9f15fc66 BM |
76 | * enabling SCIs to prevent interrupts from occurring before the handlers |
77 | * are installed. | |
1da177e4 | 78 | */ |
4be44fcd LB |
79 | status = acpi_ev_fixed_event_initialize(); |
80 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
81 | ACPI_EXCEPTION((AE_INFO, status, |
82 | "Unable to initialize fixed events")); | |
4be44fcd | 83 | return_ACPI_STATUS(status); |
1da177e4 LT |
84 | } |
85 | ||
4be44fcd LB |
86 | status = acpi_ev_gpe_initialize(); |
87 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
88 | ACPI_EXCEPTION((AE_INFO, status, |
89 | "Unable to initialize general purpose events")); | |
4be44fcd | 90 | return_ACPI_STATUS(status); |
1da177e4 LT |
91 | } |
92 | ||
4be44fcd | 93 | return_ACPI_STATUS(status); |
1da177e4 LT |
94 | } |
95 | ||
1da177e4 LT |
96 | /******************************************************************************* |
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 | ||
4be44fcd | 108 | acpi_status acpi_ev_install_xrupt_handlers(void) |
1da177e4 | 109 | { |
4be44fcd | 110 | acpi_status status; |
1da177e4 | 111 | |
b229cf92 | 112 | ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers); |
1da177e4 LT |
113 | |
114 | /* Install the SCI handler */ | |
115 | ||
4be44fcd LB |
116 | status = acpi_ev_install_sci_handler(); |
117 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
118 | ACPI_EXCEPTION((AE_INFO, status, |
119 | "Unable to install System Control Interrupt handler")); | |
4be44fcd | 120 | return_ACPI_STATUS(status); |
1da177e4 LT |
121 | } |
122 | ||
123 | /* Install the handler for the Global Lock */ | |
124 | ||
4be44fcd LB |
125 | status = acpi_ev_init_global_lock_handler(); |
126 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
127 | ACPI_EXCEPTION((AE_INFO, status, |
128 | "Unable to initialize Global Lock handler")); | |
4be44fcd | 129 | return_ACPI_STATUS(status); |
1da177e4 LT |
130 | } |
131 | ||
132 | acpi_gbl_events_initialized = TRUE; | |
4be44fcd | 133 | return_ACPI_STATUS(status); |
1da177e4 LT |
134 | } |
135 | ||
1da177e4 LT |
136 | /******************************************************************************* |
137 | * | |
138 | * FUNCTION: acpi_ev_fixed_event_initialize | |
139 | * | |
140 | * PARAMETERS: None | |
141 | * | |
142 | * RETURN: Status | |
143 | * | |
768aaaf1 | 144 | * DESCRIPTION: Install the fixed event handlers and disable all fixed events. |
1da177e4 LT |
145 | * |
146 | ******************************************************************************/ | |
147 | ||
4be44fcd | 148 | static acpi_status acpi_ev_fixed_event_initialize(void) |
1da177e4 | 149 | { |
67a119f9 | 150 | u32 i; |
4be44fcd | 151 | acpi_status status; |
1da177e4 LT |
152 | |
153 | /* | |
9f15fc66 BM |
154 | * Initialize the structure that keeps track of fixed event handlers and |
155 | * enable the fixed events. | |
1da177e4 LT |
156 | */ |
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 | ||
768aaaf1 | 161 | /* Disable the fixed event */ |
1da177e4 LT |
162 | |
163 | if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) { | |
4be44fcd | 164 | status = |
50ffba1b | 165 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
768aaaf1 BM |
166 | [i].enable_register_id, |
167 | ACPI_DISABLE_EVENT); | |
4be44fcd | 168 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
169 | return (status); |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | return (AE_OK); | |
175 | } | |
176 | ||
1da177e4 LT |
177 | /******************************************************************************* |
178 | * | |
179 | * FUNCTION: acpi_ev_fixed_event_detect | |
180 | * | |
181 | * PARAMETERS: None | |
182 | * | |
183 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
184 | * | |
44f6c012 | 185 | * DESCRIPTION: Checks the PM status register for active fixed events |
1da177e4 LT |
186 | * |
187 | ******************************************************************************/ | |
188 | ||
4be44fcd | 189 | u32 acpi_ev_fixed_event_detect(void) |
1da177e4 | 190 | { |
4be44fcd LB |
191 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
192 | u32 fixed_status; | |
193 | u32 fixed_enable; | |
67a119f9 | 194 | u32 i; |
1da177e4 | 195 | |
b229cf92 | 196 | ACPI_FUNCTION_NAME(ev_fixed_event_detect); |
1da177e4 LT |
197 | |
198 | /* | |
199 | * Read the fixed feature status and enable registers, as all the cases | |
9f15fc66 | 200 | * depend on their values. Ignore errors here. |
1da177e4 | 201 | */ |
d30dc9ab AS |
202 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status); |
203 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable); | |
1da177e4 | 204 | |
4be44fcd LB |
205 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
206 | "Fixed Event Block: Enable %08X Status %08X\n", | |
207 | fixed_enable, fixed_status)); | |
1da177e4 LT |
208 | |
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++) { | |
52fc0b02 | 213 | |
1da177e4 LT |
214 | /* Both the status and enable bits must be on for this event */ |
215 | ||
4be44fcd LB |
216 | 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)) { | |
52fc0b02 | 220 | |
1da177e4 | 221 | /* Found an active (signalled) event */ |
5229e87d | 222 | acpi_os_fixed_event_count(i); |
67a119f9 | 223 | int_status |= acpi_ev_fixed_event_dispatch(i); |
1da177e4 LT |
224 | } |
225 | } | |
226 | ||
227 | return (int_status); | |
228 | } | |
229 | ||
1da177e4 LT |
230 | /******************************************************************************* |
231 | * | |
232 | * FUNCTION: acpi_ev_fixed_event_dispatch | |
233 | * | |
234 | * PARAMETERS: Event - Event type | |
235 | * | |
236 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
237 | * | |
238 | * DESCRIPTION: Clears the status bit for the requested event, calls the | |
239 | * handler that previously registered for the event. | |
240 | * | |
241 | ******************************************************************************/ | |
242 | ||
4be44fcd | 243 | static u32 acpi_ev_fixed_event_dispatch(u32 event) |
1da177e4 LT |
244 | { |
245 | ||
4be44fcd | 246 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
247 | |
248 | /* Clear the status bit */ | |
249 | ||
50ffba1b | 250 | (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 251 | status_register_id, ACPI_CLEAR_STATUS); |
1da177e4 LT |
252 | |
253 | /* | |
9f15fc66 BM |
254 | * Make sure we've got a handler. If not, report an error. The event is |
255 | * disabled to prevent further interrupts. | |
1da177e4 LT |
256 | */ |
257 | if (NULL == acpi_gbl_fixed_event_handlers[event].handler) { | |
50ffba1b | 258 | (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 BM |
259 | enable_register_id, |
260 | ACPI_DISABLE_EVENT); | |
1da177e4 | 261 | |
b8e4d893 | 262 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 263 | "No installed handler for fixed event [0x%08X]", |
b8e4d893 | 264 | event)); |
1da177e4 LT |
265 | |
266 | return (ACPI_INTERRUPT_NOT_HANDLED); | |
267 | } | |
268 | ||
269 | /* Invoke the Fixed Event handler */ | |
270 | ||
4be44fcd LB |
271 | return ((acpi_gbl_fixed_event_handlers[event]. |
272 | handler) (acpi_gbl_fixed_event_handlers[event].context)); | |
1da177e4 | 273 | } |