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Diffstat (limited to 'drivers/acpi/acpica/evevent.c')
-rw-r--r-- | drivers/acpi/acpica/evevent.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c new file mode 100644 index 000000000000..803edd9e3f6a --- /dev/null +++ b/drivers/acpi/acpica/evevent.c | |||
@@ -0,0 +1,313 @@ | |||
1 | /****************************************************************************** | ||
2 | * | ||
3 | * Module Name: evevent - Fixed Event handling and dispatch | ||
4 | * | ||
5 | *****************************************************************************/ | ||
6 | |||
7 | /* | ||
8 | * Copyright (C) 2000 - 2008, Intel Corp. | ||
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 "accommon.h" | ||
46 | #include "acevents.h" | ||
47 | |||
48 | #define _COMPONENT ACPI_EVENTS | ||
49 | ACPI_MODULE_NAME("evevent") | ||
50 | |||
51 | /* Local prototypes */ | ||
52 | static acpi_status acpi_ev_fixed_event_initialize(void); | ||
53 | |||
54 | static u32 acpi_ev_fixed_event_dispatch(u32 event); | ||
55 | |||
56 | /******************************************************************************* | ||
57 | * | ||
58 | * FUNCTION: acpi_ev_initialize_events | ||
59 | * | ||
60 | * PARAMETERS: None | ||
61 | * | ||
62 | * RETURN: Status | ||
63 | * | ||
64 | * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE) | ||
65 | * | ||
66 | ******************************************************************************/ | ||
67 | |||
68 | acpi_status acpi_ev_initialize_events(void) | ||
69 | { | ||
70 | acpi_status status; | ||
71 | |||
72 | ACPI_FUNCTION_TRACE(ev_initialize_events); | ||
73 | |||
74 | /* | ||
75 | * Initialize the Fixed and General Purpose Events. This is done prior to | ||
76 | * enabling SCIs to prevent interrupts from occurring before the handlers | ||
77 | * are installed. | ||
78 | */ | ||
79 | status = acpi_ev_fixed_event_initialize(); | ||
80 | if (ACPI_FAILURE(status)) { | ||
81 | ACPI_EXCEPTION((AE_INFO, status, | ||
82 | "Unable to initialize fixed events")); | ||
83 | return_ACPI_STATUS(status); | ||
84 | } | ||
85 | |||
86 | status = acpi_ev_gpe_initialize(); | ||
87 | if (ACPI_FAILURE(status)) { | ||
88 | ACPI_EXCEPTION((AE_INFO, status, | ||
89 | "Unable to initialize general purpose events")); | ||
90 | return_ACPI_STATUS(status); | ||
91 | } | ||
92 | |||
93 | return_ACPI_STATUS(status); | ||
94 | } | ||
95 | |||
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 | |||
115 | ACPI_FUNCTION_TRACE(ev_install_fadt_gpes); | ||
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 | |||
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 | |||
150 | acpi_status acpi_ev_install_xrupt_handlers(void) | ||
151 | { | ||
152 | acpi_status status; | ||
153 | |||
154 | ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers); | ||
155 | |||
156 | /* Install the SCI handler */ | ||
157 | |||
158 | status = acpi_ev_install_sci_handler(); | ||
159 | if (ACPI_FAILURE(status)) { | ||
160 | ACPI_EXCEPTION((AE_INFO, status, | ||
161 | "Unable to install System Control Interrupt handler")); | ||
162 | return_ACPI_STATUS(status); | ||
163 | } | ||
164 | |||
165 | /* Install the handler for the Global Lock */ | ||
166 | |||
167 | status = acpi_ev_init_global_lock_handler(); | ||
168 | if (ACPI_FAILURE(status)) { | ||
169 | ACPI_EXCEPTION((AE_INFO, status, | ||
170 | "Unable to initialize Global Lock handler")); | ||
171 | return_ACPI_STATUS(status); | ||
172 | } | ||
173 | |||
174 | acpi_gbl_events_initialized = TRUE; | ||
175 | return_ACPI_STATUS(status); | ||
176 | } | ||
177 | |||
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 | |||
190 | static acpi_status acpi_ev_fixed_event_initialize(void) | ||
191 | { | ||
192 | u32 i; | ||
193 | acpi_status status; | ||
194 | |||
195 | /* | ||
196 | * Initialize the structure that keeps track of fixed event handlers and | ||
197 | * enable the fixed events. | ||
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) { | ||
206 | status = | ||
207 | acpi_set_register(acpi_gbl_fixed_event_info[i]. | ||
208 | enable_register_id, 0); | ||
209 | if (ACPI_FAILURE(status)) { | ||
210 | return (status); | ||
211 | } | ||
212 | } | ||
213 | } | ||
214 | |||
215 | return (AE_OK); | ||
216 | } | ||
217 | |||
218 | /******************************************************************************* | ||
219 | * | ||
220 | * FUNCTION: acpi_ev_fixed_event_detect | ||
221 | * | ||
222 | * PARAMETERS: None | ||
223 | * | ||
224 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | ||
225 | * | ||
226 | * DESCRIPTION: Checks the PM status register for active fixed events | ||
227 | * | ||
228 | ******************************************************************************/ | ||
229 | |||
230 | u32 acpi_ev_fixed_event_detect(void) | ||
231 | { | ||
232 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; | ||
233 | u32 fixed_status; | ||
234 | u32 fixed_enable; | ||
235 | u32 i; | ||
236 | |||
237 | ACPI_FUNCTION_NAME(ev_fixed_event_detect); | ||
238 | |||
239 | /* | ||
240 | * Read the fixed feature status and enable registers, as all the cases | ||
241 | * depend on their values. Ignore errors here. | ||
242 | */ | ||
243 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status); | ||
244 | (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable); | ||
245 | |||
246 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, | ||
247 | "Fixed Event Block: Enable %08X Status %08X\n", | ||
248 | fixed_enable, fixed_status)); | ||
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++) { | ||
254 | |||
255 | /* Both the status and enable bits must be on for this event */ | ||
256 | |||
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)) { | ||
261 | |||
262 | /* Found an active (signalled) event */ | ||
263 | acpi_os_fixed_event_count(i); | ||
264 | int_status |= acpi_ev_fixed_event_dispatch(i); | ||
265 | } | ||
266 | } | ||
267 | |||
268 | return (int_status); | ||
269 | } | ||
270 | |||
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 | |||
284 | static u32 acpi_ev_fixed_event_dispatch(u32 event) | ||
285 | { | ||
286 | |||
287 | ACPI_FUNCTION_ENTRY(); | ||
288 | |||
289 | /* Clear the status bit */ | ||
290 | |||
291 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. | ||
292 | status_register_id, 1); | ||
293 | |||
294 | /* | ||
295 | * Make sure we've got a handler. If not, report an error. The event is | ||
296 | * disabled to prevent further interrupts. | ||
297 | */ | ||
298 | if (NULL == acpi_gbl_fixed_event_handlers[event].handler) { | ||
299 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. | ||
300 | enable_register_id, 0); | ||
301 | |||
302 | ACPI_ERROR((AE_INFO, | ||
303 | "No installed handler for fixed event [%08X]", | ||
304 | event)); | ||
305 | |||
306 | return (ACPI_INTERRUPT_NOT_HANDLED); | ||
307 | } | ||
308 | |||
309 | /* Invoke the Fixed Event handler */ | ||
310 | |||
311 | return ((acpi_gbl_fixed_event_handlers[event]. | ||
312 | handler) (acpi_gbl_fixed_event_handlers[event].context)); | ||
313 | } | ||