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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evevent - Fixed Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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") |
33620c54 | 50 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
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 | |
22e5b40a BM |
74 | /* If Hardware Reduced flag is set, there are no fixed events */ |
75 | ||
76 | if (acpi_gbl_reduced_hardware) { | |
77 | return_ACPI_STATUS(AE_OK); | |
78 | } | |
79 | ||
1da177e4 | 80 | /* |
44f6c012 | 81 | * Initialize the Fixed and General Purpose Events. This is done prior to |
9f15fc66 BM |
82 | * enabling SCIs to prevent interrupts from occurring before the handlers |
83 | * are 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 | ||
1da177e4 LT |
102 | /******************************************************************************* |
103 | * | |
104 | * FUNCTION: acpi_ev_install_xrupt_handlers | |
105 | * | |
106 | * PARAMETERS: None | |
107 | * | |
108 | * RETURN: Status | |
109 | * | |
110 | * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock | |
111 | * | |
112 | ******************************************************************************/ | |
113 | ||
4be44fcd | 114 | acpi_status acpi_ev_install_xrupt_handlers(void) |
1da177e4 | 115 | { |
4be44fcd | 116 | acpi_status status; |
1da177e4 | 117 | |
b229cf92 | 118 | ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers); |
1da177e4 | 119 | |
22e5b40a BM |
120 | /* If Hardware Reduced flag is set, there is no ACPI h/w */ |
121 | ||
122 | if (acpi_gbl_reduced_hardware) { | |
123 | return_ACPI_STATUS(AE_OK); | |
124 | } | |
125 | ||
1da177e4 LT |
126 | /* Install the SCI handler */ |
127 | ||
4be44fcd LB |
128 | status = acpi_ev_install_sci_handler(); |
129 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
130 | ACPI_EXCEPTION((AE_INFO, status, |
131 | "Unable to install System Control Interrupt handler")); | |
4be44fcd | 132 | return_ACPI_STATUS(status); |
1da177e4 LT |
133 | } |
134 | ||
135 | /* Install the handler for the Global Lock */ | |
136 | ||
4be44fcd LB |
137 | status = acpi_ev_init_global_lock_handler(); |
138 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
139 | ACPI_EXCEPTION((AE_INFO, status, |
140 | "Unable to initialize Global Lock handler")); | |
4be44fcd | 141 | return_ACPI_STATUS(status); |
1da177e4 LT |
142 | } |
143 | ||
144 | acpi_gbl_events_initialized = TRUE; | |
4be44fcd | 145 | return_ACPI_STATUS(status); |
1da177e4 LT |
146 | } |
147 | ||
1da177e4 LT |
148 | /******************************************************************************* |
149 | * | |
150 | * FUNCTION: acpi_ev_fixed_event_initialize | |
151 | * | |
152 | * PARAMETERS: None | |
153 | * | |
154 | * RETURN: Status | |
155 | * | |
768aaaf1 | 156 | * DESCRIPTION: Install the fixed event handlers and disable all fixed events. |
1da177e4 LT |
157 | * |
158 | ******************************************************************************/ | |
159 | ||
4be44fcd | 160 | static acpi_status acpi_ev_fixed_event_initialize(void) |
1da177e4 | 161 | { |
67a119f9 | 162 | u32 i; |
4be44fcd | 163 | acpi_status status; |
1da177e4 LT |
164 | |
165 | /* | |
9f15fc66 BM |
166 | * Initialize the structure that keeps track of fixed event handlers and |
167 | * enable the fixed events. | |
1da177e4 LT |
168 | */ |
169 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
170 | acpi_gbl_fixed_event_handlers[i].handler = NULL; | |
171 | acpi_gbl_fixed_event_handlers[i].context = NULL; | |
172 | ||
768aaaf1 | 173 | /* Disable the fixed event */ |
1da177e4 LT |
174 | |
175 | if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) { | |
4be44fcd | 176 | status = |
50ffba1b | 177 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
768aaaf1 BM |
178 | [i].enable_register_id, |
179 | ACPI_DISABLE_EVENT); | |
4be44fcd | 180 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
181 | return (status); |
182 | } | |
183 | } | |
184 | } | |
185 | ||
186 | return (AE_OK); | |
187 | } | |
188 | ||
1da177e4 LT |
189 | /******************************************************************************* |
190 | * | |
191 | * FUNCTION: acpi_ev_fixed_event_detect | |
192 | * | |
193 | * PARAMETERS: None | |
194 | * | |
195 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
196 | * | |
44f6c012 | 197 | * DESCRIPTION: Checks the PM status register for active fixed events |
1da177e4 LT |
198 | * |
199 | ******************************************************************************/ | |
200 | ||
4be44fcd | 201 | u32 acpi_ev_fixed_event_detect(void) |
1da177e4 | 202 | { |
4be44fcd LB |
203 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
204 | u32 fixed_status; | |
205 | u32 fixed_enable; | |
67a119f9 | 206 | u32 i; |
1da177e4 | 207 | |
b229cf92 | 208 | ACPI_FUNCTION_NAME(ev_fixed_event_detect); |
1da177e4 LT |
209 | |
210 | /* | |
211 | * Read the fixed feature status and enable registers, as all the cases | |
9f15fc66 | 212 | * depend on their values. Ignore errors here. |
1da177e4 | 213 | */ |
d30dc9ab AS |
214 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status); |
215 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable); | |
1da177e4 | 216 | |
4be44fcd LB |
217 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
218 | "Fixed Event Block: Enable %08X Status %08X\n", | |
219 | fixed_enable, fixed_status)); | |
1da177e4 LT |
220 | |
221 | /* | |
222 | * Check for all possible Fixed Events and dispatch those that are active | |
223 | */ | |
224 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
52fc0b02 | 225 | |
1da177e4 LT |
226 | /* Both the status and enable bits must be on for this event */ |
227 | ||
4be44fcd LB |
228 | if ((fixed_status & acpi_gbl_fixed_event_info[i]. |
229 | status_bit_mask) | |
230 | && (fixed_enable & acpi_gbl_fixed_event_info[i]. | |
231 | enable_bit_mask)) { | |
a0fcdb23 LM |
232 | /* |
233 | * Found an active (signalled) event. Invoke global event | |
234 | * handler if present. | |
235 | */ | |
236 | acpi_fixed_event_count[i]++; | |
237 | if (acpi_gbl_global_event_handler) { | |
238 | acpi_gbl_global_event_handler | |
239 | (ACPI_EVENT_TYPE_FIXED, NULL, i, | |
240 | acpi_gbl_global_event_handler_context); | |
241 | } | |
52fc0b02 | 242 | |
67a119f9 | 243 | int_status |= acpi_ev_fixed_event_dispatch(i); |
1da177e4 LT |
244 | } |
245 | } | |
246 | ||
247 | return (int_status); | |
248 | } | |
249 | ||
1da177e4 LT |
250 | /******************************************************************************* |
251 | * | |
252 | * FUNCTION: acpi_ev_fixed_event_dispatch | |
253 | * | |
ba494bee | 254 | * PARAMETERS: event - Event type |
1da177e4 LT |
255 | * |
256 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
257 | * | |
258 | * DESCRIPTION: Clears the status bit for the requested event, calls the | |
259 | * handler that previously registered for the event. | |
260 | * | |
261 | ******************************************************************************/ | |
262 | ||
4be44fcd | 263 | static u32 acpi_ev_fixed_event_dispatch(u32 event) |
1da177e4 LT |
264 | { |
265 | ||
4be44fcd | 266 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
267 | |
268 | /* Clear the status bit */ | |
269 | ||
50ffba1b | 270 | (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 | 271 | status_register_id, ACPI_CLEAR_STATUS); |
1da177e4 LT |
272 | |
273 | /* | |
9f15fc66 BM |
274 | * Make sure we've got a handler. If not, report an error. The event is |
275 | * disabled to prevent further interrupts. | |
1da177e4 LT |
276 | */ |
277 | if (NULL == acpi_gbl_fixed_event_handlers[event].handler) { | |
50ffba1b | 278 | (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
768aaaf1 BM |
279 | enable_register_id, |
280 | ACPI_DISABLE_EVENT); | |
1da177e4 | 281 | |
b8e4d893 | 282 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 283 | "No installed handler for fixed event [0x%08X]", |
b8e4d893 | 284 | event)); |
1da177e4 LT |
285 | |
286 | return (ACPI_INTERRUPT_NOT_HANDLED); | |
287 | } | |
288 | ||
289 | /* Invoke the Fixed Event handler */ | |
290 | ||
4be44fcd LB |
291 | return ((acpi_gbl_fixed_event_handlers[event]. |
292 | handler) (acpi_gbl_fixed_event_handlers[event].context)); | |
1da177e4 | 293 | } |
33620c54 BM |
294 | |
295 | #endif /* !ACPI_REDUCED_HARDWARE */ |