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1/******************************************************************************
2 *
3 * Module Name: evevent - Fixed Event handling and dispatch
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, 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
49ACPI_MODULE_NAME("evevent")
50
51/* Local prototypes */
52static acpi_status acpi_ev_fixed_event_initialize(void);
53
54static 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
68acpi_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_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
108acpi_status acpi_ev_install_xrupt_handlers(void)
109{
110 acpi_status status;
111
112 ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers);
113
114 /* Install the SCI handler */
115
116 status = acpi_ev_install_sci_handler();
117 if (ACPI_FAILURE(status)) {
118 ACPI_EXCEPTION((AE_INFO, status,
119 "Unable to install System Control Interrupt handler"));
120 return_ACPI_STATUS(status);
121 }
122
123 /* Install the handler for the Global Lock */
124
125 status = acpi_ev_init_global_lock_handler();
126 if (ACPI_FAILURE(status)) {
127 ACPI_EXCEPTION((AE_INFO, status,
128 "Unable to initialize Global Lock handler"));
129 return_ACPI_STATUS(status);
130 }
131
132 acpi_gbl_events_initialized = TRUE;
133 return_ACPI_STATUS(status);
134}
135
136/*******************************************************************************
137 *
138 * FUNCTION: acpi_ev_fixed_event_initialize
139 *
140 * PARAMETERS: None
141 *
142 * RETURN: Status
143 *
144 * DESCRIPTION: Install the fixed event handlers and disable all fixed events.
145 *
146 ******************************************************************************/
147
148static acpi_status acpi_ev_fixed_event_initialize(void)
149{
150 u32 i;
151 acpi_status status;
152
153 /*
154 * Initialize the structure that keeps track of fixed event handlers and
155 * enable the fixed events.
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
161 /* Disable the fixed event */
162
163 if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
164 status =
165 acpi_write_bit_register(acpi_gbl_fixed_event_info
166 [i].enable_register_id,
167 ACPI_DISABLE_EVENT);
168 if (ACPI_FAILURE(status)) {
169 return (status);
170 }
171 }
172 }
173
174 return (AE_OK);
175}
176
177/*******************************************************************************
178 *
179 * FUNCTION: acpi_ev_fixed_event_detect
180 *
181 * PARAMETERS: None
182 *
183 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
184 *
185 * DESCRIPTION: Checks the PM status register for active fixed events
186 *
187 ******************************************************************************/
188
189u32 acpi_ev_fixed_event_detect(void)
190{
191 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
192 u32 fixed_status;
193 u32 fixed_enable;
194 u32 i;
195
196 ACPI_FUNCTION_NAME(ev_fixed_event_detect);
197
198 /*
199 * Read the fixed feature status and enable registers, as all the cases
200 * depend on their values. Ignore errors here.
201 */
202 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
203 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
204
205 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
206 "Fixed Event Block: Enable %08X Status %08X\n",
207 fixed_enable, fixed_status));
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++) {
213
214 /* Both the status and enable bits must be on for this event */
215
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)) {
220 /*
221 * Found an active (signalled) event. Invoke global event
222 * handler if present.
223 */
224 acpi_fixed_event_count[i]++;
225 if (acpi_gbl_global_event_handler) {
226 acpi_gbl_global_event_handler
227 (ACPI_EVENT_TYPE_FIXED, NULL, i,
228 acpi_gbl_global_event_handler_context);
229 }
230
231 int_status |= acpi_ev_fixed_event_dispatch(i);
232 }
233 }
234
235 return (int_status);
236}
237
238/*******************************************************************************
239 *
240 * FUNCTION: acpi_ev_fixed_event_dispatch
241 *
242 * PARAMETERS: Event - Event type
243 *
244 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
245 *
246 * DESCRIPTION: Clears the status bit for the requested event, calls the
247 * handler that previously registered for the event.
248 *
249 ******************************************************************************/
250
251static u32 acpi_ev_fixed_event_dispatch(u32 event)
252{
253
254 ACPI_FUNCTION_ENTRY();
255
256 /* Clear the status bit */
257
258 (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
259 status_register_id, ACPI_CLEAR_STATUS);
260
261 /*
262 * Make sure we've got a handler. If not, report an error. The event is
263 * disabled to prevent further interrupts.
264 */
265 if (NULL == acpi_gbl_fixed_event_handlers[event].handler) {
266 (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
267 enable_register_id,
268 ACPI_DISABLE_EVENT);
269
270 ACPI_ERROR((AE_INFO,
271 "No installed handler for fixed event [0x%08X]",
272 event));
273
274 return (ACPI_INTERRUPT_NOT_HANDLED);
275 }
276
277 /* Invoke the Fixed Event handler */
278
279 return ((acpi_gbl_fixed_event_handlers[event].
280 handler) (acpi_gbl_fixed_event_handlers[event].context));
281}
1/******************************************************************************
2 *
3 * Module Name: evevent - Fixed Event handling and dispatch
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, 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
49ACPI_MODULE_NAME("evevent")
50#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
51/* Local prototypes */
52static acpi_status acpi_ev_fixed_event_initialize(void);
53
54static 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
68acpi_status acpi_ev_initialize_events(void)
69{
70 acpi_status status;
71
72 ACPI_FUNCTION_TRACE(ev_initialize_events);
73
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
80 /*
81 * Initialize the Fixed and General Purpose Events. This is done prior to
82 * enabling SCIs to prevent interrupts from occurring before the handlers
83 * are installed.
84 */
85 status = acpi_ev_fixed_event_initialize();
86 if (ACPI_FAILURE(status)) {
87 ACPI_EXCEPTION((AE_INFO, status,
88 "Unable to initialize fixed events"));
89 return_ACPI_STATUS(status);
90 }
91
92 status = acpi_ev_gpe_initialize();
93 if (ACPI_FAILURE(status)) {
94 ACPI_EXCEPTION((AE_INFO, status,
95 "Unable to initialize general purpose events"));
96 return_ACPI_STATUS(status);
97 }
98
99 return_ACPI_STATUS(status);
100}
101
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
114acpi_status acpi_ev_install_xrupt_handlers(void)
115{
116 acpi_status status;
117
118 ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers);
119
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
126 /* Install the SCI handler */
127
128 status = acpi_ev_install_sci_handler();
129 if (ACPI_FAILURE(status)) {
130 ACPI_EXCEPTION((AE_INFO, status,
131 "Unable to install System Control Interrupt handler"));
132 return_ACPI_STATUS(status);
133 }
134
135 /* Install the handler for the Global Lock */
136
137 status = acpi_ev_init_global_lock_handler();
138 if (ACPI_FAILURE(status)) {
139 ACPI_EXCEPTION((AE_INFO, status,
140 "Unable to initialize Global Lock handler"));
141 return_ACPI_STATUS(status);
142 }
143
144 acpi_gbl_events_initialized = TRUE;
145 return_ACPI_STATUS(status);
146}
147
148/*******************************************************************************
149 *
150 * FUNCTION: acpi_ev_fixed_event_initialize
151 *
152 * PARAMETERS: None
153 *
154 * RETURN: Status
155 *
156 * DESCRIPTION: Install the fixed event handlers and disable all fixed events.
157 *
158 ******************************************************************************/
159
160static acpi_status acpi_ev_fixed_event_initialize(void)
161{
162 u32 i;
163 acpi_status status;
164
165 /*
166 * Initialize the structure that keeps track of fixed event handlers and
167 * enable the fixed events.
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
173 /* Disable the fixed event */
174
175 if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
176 status =
177 acpi_write_bit_register(acpi_gbl_fixed_event_info
178 [i].enable_register_id,
179 ACPI_DISABLE_EVENT);
180 if (ACPI_FAILURE(status)) {
181 return (status);
182 }
183 }
184 }
185
186 return (AE_OK);
187}
188
189/*******************************************************************************
190 *
191 * FUNCTION: acpi_ev_fixed_event_detect
192 *
193 * PARAMETERS: None
194 *
195 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
196 *
197 * DESCRIPTION: Checks the PM status register for active fixed events
198 *
199 ******************************************************************************/
200
201u32 acpi_ev_fixed_event_detect(void)
202{
203 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
204 u32 fixed_status;
205 u32 fixed_enable;
206 u32 i;
207
208 ACPI_FUNCTION_NAME(ev_fixed_event_detect);
209
210 /*
211 * Read the fixed feature status and enable registers, as all the cases
212 * depend on their values. Ignore errors here.
213 */
214 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
215 (void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
216
217 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
218 "Fixed Event Block: Enable %08X Status %08X\n",
219 fixed_enable, fixed_status));
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++) {
225
226 /* Both the status and enable bits must be on for this event */
227
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)) {
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 }
242
243 int_status |= acpi_ev_fixed_event_dispatch(i);
244 }
245 }
246
247 return (int_status);
248}
249
250/*******************************************************************************
251 *
252 * FUNCTION: acpi_ev_fixed_event_dispatch
253 *
254 * PARAMETERS: Event - Event type
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
263static u32 acpi_ev_fixed_event_dispatch(u32 event)
264{
265
266 ACPI_FUNCTION_ENTRY();
267
268 /* Clear the status bit */
269
270 (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
271 status_register_id, ACPI_CLEAR_STATUS);
272
273 /*
274 * Make sure we've got a handler. If not, report an error. The event is
275 * disabled to prevent further interrupts.
276 */
277 if (NULL == acpi_gbl_fixed_event_handlers[event].handler) {
278 (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
279 enable_register_id,
280 ACPI_DISABLE_EVENT);
281
282 ACPI_ERROR((AE_INFO,
283 "No installed handler for fixed event [0x%08X]",
284 event));
285
286 return (ACPI_INTERRUPT_NOT_HANDLED);
287 }
288
289 /* Invoke the Fixed Event handler */
290
291 return ((acpi_gbl_fixed_event_handlers[event].
292 handler) (acpi_gbl_fixed_event_handlers[event].context));
293}
294
295#endif /* !ACPI_REDUCED_HARDWARE */