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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evevent - Fixed Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, 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> | |
50df4d8b | 45 | #include <acpi/accommon.h> |
1da177e4 LT |
46 | #include <acpi/acevents.h> |
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 | ||
96db255c BM |
96 | /******************************************************************************* |
97 | * | |
98 | * FUNCTION: acpi_ev_install_fadt_gpes | |
99 | * | |
100 | * PARAMETERS: None | |
101 | * | |
102 | * RETURN: Status | |
103 | * | |
104 | * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks | |
105 | * (0 and 1). This causes the _PRW methods to be run, so the HW | |
106 | * must be fully initialized at this point, including global lock | |
107 | * support. | |
108 | * | |
109 | ******************************************************************************/ | |
110 | ||
111 | acpi_status acpi_ev_install_fadt_gpes(void) | |
112 | { | |
113 | acpi_status status; | |
114 | ||
b229cf92 | 115 | ACPI_FUNCTION_TRACE(ev_install_fadt_gpes); |
96db255c BM |
116 | |
117 | /* Namespace must be locked */ | |
118 | ||
119 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
120 | if (ACPI_FAILURE(status)) { | |
121 | return (status); | |
122 | } | |
123 | ||
124 | /* FADT GPE Block 0 */ | |
125 | ||
126 | (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device, | |
127 | acpi_gbl_gpe_fadt_blocks[0]); | |
128 | ||
129 | /* FADT GPE Block 1 */ | |
130 | ||
131 | (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device, | |
132 | acpi_gbl_gpe_fadt_blocks[1]); | |
133 | ||
134 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
135 | return_ACPI_STATUS(AE_OK); | |
136 | } | |
137 | ||
1da177e4 LT |
138 | /******************************************************************************* |
139 | * | |
140 | * FUNCTION: acpi_ev_install_xrupt_handlers | |
141 | * | |
142 | * PARAMETERS: None | |
143 | * | |
144 | * RETURN: Status | |
145 | * | |
146 | * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock | |
147 | * | |
148 | ******************************************************************************/ | |
149 | ||
4be44fcd | 150 | acpi_status acpi_ev_install_xrupt_handlers(void) |
1da177e4 | 151 | { |
4be44fcd | 152 | acpi_status status; |
1da177e4 | 153 | |
b229cf92 | 154 | ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers); |
1da177e4 LT |
155 | |
156 | /* Install the SCI handler */ | |
157 | ||
4be44fcd LB |
158 | status = acpi_ev_install_sci_handler(); |
159 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
160 | ACPI_EXCEPTION((AE_INFO, status, |
161 | "Unable to install System Control Interrupt handler")); | |
4be44fcd | 162 | return_ACPI_STATUS(status); |
1da177e4 LT |
163 | } |
164 | ||
165 | /* Install the handler for the Global Lock */ | |
166 | ||
4be44fcd LB |
167 | status = acpi_ev_init_global_lock_handler(); |
168 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
169 | ACPI_EXCEPTION((AE_INFO, status, |
170 | "Unable to initialize Global Lock handler")); | |
4be44fcd | 171 | return_ACPI_STATUS(status); |
1da177e4 LT |
172 | } |
173 | ||
174 | acpi_gbl_events_initialized = TRUE; | |
4be44fcd | 175 | return_ACPI_STATUS(status); |
1da177e4 LT |
176 | } |
177 | ||
1da177e4 LT |
178 | /******************************************************************************* |
179 | * | |
180 | * FUNCTION: acpi_ev_fixed_event_initialize | |
181 | * | |
182 | * PARAMETERS: None | |
183 | * | |
184 | * RETURN: Status | |
185 | * | |
186 | * DESCRIPTION: Install the fixed event handlers and enable the fixed events. | |
187 | * | |
188 | ******************************************************************************/ | |
189 | ||
4be44fcd | 190 | static acpi_status acpi_ev_fixed_event_initialize(void) |
1da177e4 | 191 | { |
67a119f9 | 192 | u32 i; |
4be44fcd | 193 | acpi_status status; |
1da177e4 LT |
194 | |
195 | /* | |
9f15fc66 BM |
196 | * Initialize the structure that keeps track of fixed event handlers and |
197 | * enable the fixed events. | |
1da177e4 LT |
198 | */ |
199 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
200 | acpi_gbl_fixed_event_handlers[i].handler = NULL; | |
201 | acpi_gbl_fixed_event_handlers[i].context = NULL; | |
202 | ||
203 | /* Enable the fixed event */ | |
204 | ||
205 | if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) { | |
4be44fcd LB |
206 | status = |
207 | acpi_set_register(acpi_gbl_fixed_event_info[i]. | |
d8c71b6d | 208 | enable_register_id, 0); |
4be44fcd | 209 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
210 | return (status); |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | return (AE_OK); | |
216 | } | |
217 | ||
1da177e4 LT |
218 | /******************************************************************************* |
219 | * | |
220 | * FUNCTION: acpi_ev_fixed_event_detect | |
221 | * | |
222 | * PARAMETERS: None | |
223 | * | |
224 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
225 | * | |
44f6c012 | 226 | * DESCRIPTION: Checks the PM status register for active fixed events |
1da177e4 LT |
227 | * |
228 | ******************************************************************************/ | |
229 | ||
4be44fcd | 230 | u32 acpi_ev_fixed_event_detect(void) |
1da177e4 | 231 | { |
4be44fcd LB |
232 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
233 | u32 fixed_status; | |
234 | u32 fixed_enable; | |
67a119f9 | 235 | u32 i; |
1da177e4 | 236 | |
b229cf92 | 237 | ACPI_FUNCTION_NAME(ev_fixed_event_detect); |
1da177e4 LT |
238 | |
239 | /* | |
240 | * Read the fixed feature status and enable registers, as all the cases | |
9f15fc66 | 241 | * depend on their values. Ignore errors here. |
1da177e4 | 242 | */ |
d30dc9ab AS |
243 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status); |
244 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable); | |
1da177e4 | 245 | |
4be44fcd LB |
246 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
247 | "Fixed Event Block: Enable %08X Status %08X\n", | |
248 | fixed_enable, fixed_status)); | |
1da177e4 LT |
249 | |
250 | /* | |
251 | * Check for all possible Fixed Events and dispatch those that are active | |
252 | */ | |
253 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
52fc0b02 | 254 | |
1da177e4 LT |
255 | /* Both the status and enable bits must be on for this event */ |
256 | ||
4be44fcd LB |
257 | if ((fixed_status & acpi_gbl_fixed_event_info[i]. |
258 | status_bit_mask) | |
259 | && (fixed_enable & acpi_gbl_fixed_event_info[i]. | |
260 | enable_bit_mask)) { | |
52fc0b02 | 261 | |
1da177e4 | 262 | /* Found an active (signalled) event */ |
5229e87d | 263 | acpi_os_fixed_event_count(i); |
67a119f9 | 264 | int_status |= acpi_ev_fixed_event_dispatch(i); |
1da177e4 LT |
265 | } |
266 | } | |
267 | ||
268 | return (int_status); | |
269 | } | |
270 | ||
1da177e4 LT |
271 | /******************************************************************************* |
272 | * | |
273 | * FUNCTION: acpi_ev_fixed_event_dispatch | |
274 | * | |
275 | * PARAMETERS: Event - Event type | |
276 | * | |
277 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
278 | * | |
279 | * DESCRIPTION: Clears the status bit for the requested event, calls the | |
280 | * handler that previously registered for the event. | |
281 | * | |
282 | ******************************************************************************/ | |
283 | ||
4be44fcd | 284 | static u32 acpi_ev_fixed_event_dispatch(u32 event) |
1da177e4 LT |
285 | { |
286 | ||
4be44fcd | 287 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
288 | |
289 | /* Clear the status bit */ | |
290 | ||
4be44fcd | 291 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. |
d8c71b6d | 292 | status_register_id, 1); |
1da177e4 LT |
293 | |
294 | /* | |
9f15fc66 BM |
295 | * Make sure we've got a handler. If not, report an error. The event is |
296 | * disabled to prevent further interrupts. | |
1da177e4 LT |
297 | */ |
298 | if (NULL == acpi_gbl_fixed_event_handlers[event].handler) { | |
4be44fcd | 299 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. |
d8c71b6d | 300 | enable_register_id, 0); |
1da177e4 | 301 | |
b8e4d893 BM |
302 | ACPI_ERROR((AE_INFO, |
303 | "No installed handler for fixed event [%08X]", | |
304 | event)); | |
1da177e4 LT |
305 | |
306 | return (ACPI_INTERRUPT_NOT_HANDLED); | |
307 | } | |
308 | ||
309 | /* Invoke the Fixed Event handler */ | |
310 | ||
4be44fcd LB |
311 | return ((acpi_gbl_fixed_event_handlers[event]. |
312 | handler) (acpi_gbl_fixed_event_handlers[event].context)); | |
1da177e4 | 313 | } |