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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evevent - Fixed Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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> | |
45 | #include <acpi/acevents.h> | |
46 | ||
47 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 48 | ACPI_MODULE_NAME("evevent") |
1da177e4 | 49 | |
44f6c012 | 50 | /* Local prototypes */ |
4be44fcd | 51 | static acpi_status acpi_ev_fixed_event_initialize(void); |
44f6c012 | 52 | |
4be44fcd | 53 | static u32 acpi_ev_fixed_event_dispatch(u32 event); |
1da177e4 LT |
54 | |
55 | /******************************************************************************* | |
56 | * | |
57 | * FUNCTION: acpi_ev_initialize_events | |
58 | * | |
59 | * PARAMETERS: None | |
60 | * | |
61 | * RETURN: Status | |
62 | * | |
44f6c012 | 63 | * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE) |
1da177e4 LT |
64 | * |
65 | ******************************************************************************/ | |
66 | ||
4be44fcd | 67 | acpi_status acpi_ev_initialize_events(void) |
1da177e4 | 68 | { |
4be44fcd | 69 | acpi_status status; |
1da177e4 | 70 | |
4be44fcd | 71 | ACPI_FUNCTION_TRACE("ev_initialize_events"); |
1da177e4 LT |
72 | |
73 | /* Make sure we have ACPI tables */ | |
74 | ||
75 | if (!acpi_gbl_DSDT) { | |
b8e4d893 | 76 | ACPI_WARNING((AE_INFO, "No ACPI tables present!")); |
4be44fcd | 77 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
1da177e4 LT |
78 | } |
79 | ||
80 | /* | |
44f6c012 RM |
81 | * Initialize the Fixed and General Purpose Events. This is done prior to |
82 | * enabling SCIs to prevent interrupts from occurring before the handlers are | |
83 | * installed. | |
1da177e4 | 84 | */ |
4be44fcd LB |
85 | status = acpi_ev_fixed_event_initialize(); |
86 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
87 | ACPI_EXCEPTION((AE_INFO, status, |
88 | "Unable to initialize fixed events")); | |
4be44fcd | 89 | return_ACPI_STATUS(status); |
1da177e4 LT |
90 | } |
91 | ||
4be44fcd LB |
92 | status = acpi_ev_gpe_initialize(); |
93 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
94 | ACPI_EXCEPTION((AE_INFO, status, |
95 | "Unable to initialize general purpose events")); | |
4be44fcd | 96 | return_ACPI_STATUS(status); |
1da177e4 LT |
97 | } |
98 | ||
4be44fcd | 99 | return_ACPI_STATUS(status); |
1da177e4 LT |
100 | } |
101 | ||
96db255c BM |
102 | /******************************************************************************* |
103 | * | |
104 | * FUNCTION: acpi_ev_install_fadt_gpes | |
105 | * | |
106 | * PARAMETERS: None | |
107 | * | |
108 | * RETURN: Status | |
109 | * | |
110 | * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks | |
111 | * (0 and 1). This causes the _PRW methods to be run, so the HW | |
112 | * must be fully initialized at this point, including global lock | |
113 | * support. | |
114 | * | |
115 | ******************************************************************************/ | |
116 | ||
117 | acpi_status acpi_ev_install_fadt_gpes(void) | |
118 | { | |
119 | acpi_status status; | |
120 | ||
121 | ACPI_FUNCTION_TRACE("ev_install_fadt_gpes"); | |
122 | ||
123 | /* Namespace must be locked */ | |
124 | ||
125 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
126 | if (ACPI_FAILURE(status)) { | |
127 | return (status); | |
128 | } | |
129 | ||
130 | /* FADT GPE Block 0 */ | |
131 | ||
132 | (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device, | |
133 | acpi_gbl_gpe_fadt_blocks[0]); | |
134 | ||
135 | /* FADT GPE Block 1 */ | |
136 | ||
137 | (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device, | |
138 | acpi_gbl_gpe_fadt_blocks[1]); | |
139 | ||
140 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
141 | return_ACPI_STATUS(AE_OK); | |
142 | } | |
143 | ||
1da177e4 LT |
144 | /******************************************************************************* |
145 | * | |
146 | * FUNCTION: acpi_ev_install_xrupt_handlers | |
147 | * | |
148 | * PARAMETERS: None | |
149 | * | |
150 | * RETURN: Status | |
151 | * | |
152 | * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock | |
153 | * | |
154 | ******************************************************************************/ | |
155 | ||
4be44fcd | 156 | acpi_status acpi_ev_install_xrupt_handlers(void) |
1da177e4 | 157 | { |
4be44fcd | 158 | acpi_status status; |
1da177e4 | 159 | |
4be44fcd | 160 | ACPI_FUNCTION_TRACE("ev_install_xrupt_handlers"); |
1da177e4 LT |
161 | |
162 | /* Install the SCI handler */ | |
163 | ||
4be44fcd LB |
164 | status = acpi_ev_install_sci_handler(); |
165 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
166 | ACPI_EXCEPTION((AE_INFO, status, |
167 | "Unable to install System Control Interrupt handler")); | |
4be44fcd | 168 | return_ACPI_STATUS(status); |
1da177e4 LT |
169 | } |
170 | ||
171 | /* Install the handler for the Global Lock */ | |
172 | ||
4be44fcd LB |
173 | status = acpi_ev_init_global_lock_handler(); |
174 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
175 | ACPI_EXCEPTION((AE_INFO, status, |
176 | "Unable to initialize Global Lock handler")); | |
4be44fcd | 177 | return_ACPI_STATUS(status); |
1da177e4 LT |
178 | } |
179 | ||
180 | acpi_gbl_events_initialized = TRUE; | |
4be44fcd | 181 | return_ACPI_STATUS(status); |
1da177e4 LT |
182 | } |
183 | ||
1da177e4 LT |
184 | /******************************************************************************* |
185 | * | |
186 | * FUNCTION: acpi_ev_fixed_event_initialize | |
187 | * | |
188 | * PARAMETERS: None | |
189 | * | |
190 | * RETURN: Status | |
191 | * | |
192 | * DESCRIPTION: Install the fixed event handlers and enable the fixed events. | |
193 | * | |
194 | ******************************************************************************/ | |
195 | ||
4be44fcd | 196 | static acpi_status acpi_ev_fixed_event_initialize(void) |
1da177e4 | 197 | { |
4be44fcd LB |
198 | acpi_native_uint i; |
199 | acpi_status status; | |
1da177e4 LT |
200 | |
201 | /* | |
202 | * Initialize the structure that keeps track of fixed event handlers | |
203 | * and enable the fixed events. | |
204 | */ | |
205 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
206 | acpi_gbl_fixed_event_handlers[i].handler = NULL; | |
207 | acpi_gbl_fixed_event_handlers[i].context = NULL; | |
208 | ||
209 | /* Enable the fixed event */ | |
210 | ||
211 | if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) { | |
4be44fcd LB |
212 | status = |
213 | acpi_set_register(acpi_gbl_fixed_event_info[i]. | |
214 | enable_register_id, 0, | |
215 | ACPI_MTX_LOCK); | |
216 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
217 | return (status); |
218 | } | |
219 | } | |
220 | } | |
221 | ||
222 | return (AE_OK); | |
223 | } | |
224 | ||
1da177e4 LT |
225 | /******************************************************************************* |
226 | * | |
227 | * FUNCTION: acpi_ev_fixed_event_detect | |
228 | * | |
229 | * PARAMETERS: None | |
230 | * | |
231 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
232 | * | |
44f6c012 | 233 | * DESCRIPTION: Checks the PM status register for active fixed events |
1da177e4 LT |
234 | * |
235 | ******************************************************************************/ | |
236 | ||
4be44fcd | 237 | u32 acpi_ev_fixed_event_detect(void) |
1da177e4 | 238 | { |
4be44fcd LB |
239 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
240 | u32 fixed_status; | |
241 | u32 fixed_enable; | |
242 | acpi_native_uint i; | |
1da177e4 | 243 | |
4be44fcd | 244 | ACPI_FUNCTION_NAME("ev_fixed_event_detect"); |
1da177e4 LT |
245 | |
246 | /* | |
247 | * Read the fixed feature status and enable registers, as all the cases | |
248 | * depend on their values. Ignore errors here. | |
249 | */ | |
4be44fcd LB |
250 | (void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
251 | ACPI_REGISTER_PM1_STATUS, &fixed_status); | |
252 | (void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, | |
253 | ACPI_REGISTER_PM1_ENABLE, &fixed_enable); | |
1da177e4 | 254 | |
4be44fcd LB |
255 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
256 | "Fixed Event Block: Enable %08X Status %08X\n", | |
257 | fixed_enable, fixed_status)); | |
1da177e4 LT |
258 | |
259 | /* | |
260 | * Check for all possible Fixed Events and dispatch those that are active | |
261 | */ | |
262 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
263 | /* Both the status and enable bits must be on for this event */ | |
264 | ||
4be44fcd LB |
265 | if ((fixed_status & acpi_gbl_fixed_event_info[i]. |
266 | status_bit_mask) | |
267 | && (fixed_enable & acpi_gbl_fixed_event_info[i]. | |
268 | enable_bit_mask)) { | |
1da177e4 LT |
269 | /* Found an active (signalled) event */ |
270 | ||
4be44fcd | 271 | int_status |= acpi_ev_fixed_event_dispatch((u32) i); |
1da177e4 LT |
272 | } |
273 | } | |
274 | ||
275 | return (int_status); | |
276 | } | |
277 | ||
1da177e4 LT |
278 | /******************************************************************************* |
279 | * | |
280 | * FUNCTION: acpi_ev_fixed_event_dispatch | |
281 | * | |
282 | * PARAMETERS: Event - Event type | |
283 | * | |
284 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
285 | * | |
286 | * DESCRIPTION: Clears the status bit for the requested event, calls the | |
287 | * handler that previously registered for the event. | |
288 | * | |
289 | ******************************************************************************/ | |
290 | ||
4be44fcd | 291 | static u32 acpi_ev_fixed_event_dispatch(u32 event) |
1da177e4 LT |
292 | { |
293 | ||
4be44fcd | 294 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
295 | |
296 | /* Clear the status bit */ | |
297 | ||
4be44fcd LB |
298 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. |
299 | status_register_id, 1, ACPI_MTX_DO_NOT_LOCK); | |
1da177e4 LT |
300 | |
301 | /* | |
302 | * Make sure we've got a handler. If not, report an error. | |
303 | * The event is disabled to prevent further interrupts. | |
304 | */ | |
305 | if (NULL == acpi_gbl_fixed_event_handlers[event].handler) { | |
4be44fcd LB |
306 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. |
307 | enable_register_id, 0, | |
308 | ACPI_MTX_DO_NOT_LOCK); | |
1da177e4 | 309 | |
b8e4d893 BM |
310 | ACPI_ERROR((AE_INFO, |
311 | "No installed handler for fixed event [%08X]", | |
312 | event)); | |
1da177e4 LT |
313 | |
314 | return (ACPI_INTERRUPT_NOT_HANDLED); | |
315 | } | |
316 | ||
317 | /* Invoke the Fixed Event handler */ | |
318 | ||
4be44fcd LB |
319 | return ((acpi_gbl_fixed_event_handlers[event]. |
320 | handler) (acpi_gbl_fixed_event_handlers[event].context)); | |
1da177e4 | 321 | } |