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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: evsci - System Control Interrupt configuration and | |
4 | * legacy to ACPI mode state transition functions | |
5 | * | |
6 | ******************************************************************************/ | |
7 | ||
8 | /* | |
b4e104ea | 9 | * Copyright (C) 2000 - 2011, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
45 | #include <acpi/acpi.h> | |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acevents.h" | |
1da177e4 | 48 | |
1da177e4 | 49 | #define _COMPONENT ACPI_EVENTS |
4be44fcd | 50 | ACPI_MODULE_NAME("evsci") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
4be44fcd | 53 | static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context); |
1da177e4 LT |
54 | |
55 | /******************************************************************************* | |
56 | * | |
57 | * FUNCTION: acpi_ev_sci_xrupt_handler | |
58 | * | |
59 | * PARAMETERS: Context - Calling Context | |
60 | * | |
61 | * RETURN: Status code indicates whether interrupt was handled. | |
62 | * | |
63 | * DESCRIPTION: Interrupt handler that will figure out what function or | |
64 | * control method to call to deal with a SCI. | |
65 | * | |
66 | ******************************************************************************/ | |
67 | ||
4be44fcd | 68 | static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context) |
1da177e4 | 69 | { |
4be44fcd LB |
70 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; |
71 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
1da177e4 | 72 | |
b229cf92 | 73 | ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler); |
1da177e4 | 74 | |
1da177e4 LT |
75 | /* |
76 | * We are guaranteed by the ACPI CA initialization/shutdown code that | |
77 | * if this interrupt handler is installed, ACPI is enabled. | |
78 | */ | |
79 | ||
80 | /* | |
81 | * Fixed Events: | |
82 | * Check for and dispatch any Fixed Events that have occurred | |
83 | */ | |
4be44fcd | 84 | interrupt_handled |= acpi_ev_fixed_event_detect(); |
1da177e4 LT |
85 | |
86 | /* | |
87 | * General Purpose Events: | |
88 | * Check for and dispatch any GPEs that have occurred | |
89 | */ | |
4be44fcd | 90 | interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); |
1da177e4 | 91 | |
50eca3eb | 92 | return_UINT32(interrupt_handled); |
1da177e4 LT |
93 | } |
94 | ||
1da177e4 LT |
95 | /******************************************************************************* |
96 | * | |
97 | * FUNCTION: acpi_ev_gpe_xrupt_handler | |
98 | * | |
99 | * PARAMETERS: Context - Calling Context | |
100 | * | |
101 | * RETURN: Status code indicates whether interrupt was handled. | |
102 | * | |
103 | * DESCRIPTION: Handler for GPE Block Device interrupts | |
104 | * | |
105 | ******************************************************************************/ | |
106 | ||
4be44fcd | 107 | u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context) |
1da177e4 | 108 | { |
4be44fcd LB |
109 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; |
110 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
1da177e4 | 111 | |
b229cf92 | 112 | ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler); |
1da177e4 | 113 | |
1da177e4 LT |
114 | /* |
115 | * We are guaranteed by the ACPI CA initialization/shutdown code that | |
116 | * if this interrupt handler is installed, ACPI is enabled. | |
117 | */ | |
118 | ||
9f15fc66 BM |
119 | /* GPEs: Check for and dispatch any GPEs that have occurred */ |
120 | ||
4be44fcd | 121 | interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); |
1da177e4 | 122 | |
50eca3eb | 123 | return_UINT32(interrupt_handled); |
1da177e4 LT |
124 | } |
125 | ||
1da177e4 LT |
126 | /****************************************************************************** |
127 | * | |
128 | * FUNCTION: acpi_ev_install_sci_handler | |
129 | * | |
130 | * PARAMETERS: none | |
131 | * | |
132 | * RETURN: Status | |
133 | * | |
134 | * DESCRIPTION: Installs SCI handler. | |
135 | * | |
136 | ******************************************************************************/ | |
137 | ||
4be44fcd | 138 | u32 acpi_ev_install_sci_handler(void) |
1da177e4 | 139 | { |
4be44fcd | 140 | u32 status = AE_OK; |
1da177e4 | 141 | |
b229cf92 | 142 | ACPI_FUNCTION_TRACE(ev_install_sci_handler); |
1da177e4 | 143 | |
f3d2e786 BM |
144 | status = |
145 | acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, | |
146 | acpi_ev_sci_xrupt_handler, | |
147 | acpi_gbl_gpe_xrupt_list_head); | |
4be44fcd | 148 | return_ACPI_STATUS(status); |
1da177e4 LT |
149 | } |
150 | ||
1da177e4 LT |
151 | /****************************************************************************** |
152 | * | |
153 | * FUNCTION: acpi_ev_remove_sci_handler | |
154 | * | |
155 | * PARAMETERS: none | |
156 | * | |
157 | * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not | |
158 | * installed to begin with | |
159 | * | |
9f15fc66 | 160 | * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be |
1da177e4 LT |
161 | * taken. |
162 | * | |
163 | * Note: It doesn't seem important to disable all events or set the event | |
9f15fc66 | 164 | * enable registers to their original values. The OS should disable |
1da177e4 LT |
165 | * the SCI interrupt level when the handler is removed, so no more |
166 | * events will come in. | |
167 | * | |
168 | ******************************************************************************/ | |
169 | ||
4be44fcd | 170 | acpi_status acpi_ev_remove_sci_handler(void) |
1da177e4 | 171 | { |
4be44fcd | 172 | acpi_status status; |
1da177e4 | 173 | |
b229cf92 | 174 | ACPI_FUNCTION_TRACE(ev_remove_sci_handler); |
1da177e4 LT |
175 | |
176 | /* Just let the OS remove the handler and disable the level */ | |
177 | ||
f3d2e786 BM |
178 | status = |
179 | acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, | |
180 | acpi_ev_sci_xrupt_handler); | |
1da177e4 | 181 | |
4be44fcd | 182 | return_ACPI_STATUS(status); |
1da177e4 | 183 | } |