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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 | /* | |
75a44ce0 | 9 | * Copyright (C) 2000 - 2008, 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> | |
46 | #include <acpi/acevents.h> | |
47 | ||
1da177e4 | 48 | #define _COMPONENT ACPI_EVENTS |
4be44fcd | 49 | ACPI_MODULE_NAME("evsci") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
4be44fcd | 52 | static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context); |
1da177e4 LT |
53 | |
54 | /******************************************************************************* | |
55 | * | |
56 | * FUNCTION: acpi_ev_sci_xrupt_handler | |
57 | * | |
58 | * PARAMETERS: Context - Calling Context | |
59 | * | |
60 | * RETURN: Status code indicates whether interrupt was handled. | |
61 | * | |
62 | * DESCRIPTION: Interrupt handler that will figure out what function or | |
63 | * control method to call to deal with a SCI. | |
64 | * | |
65 | ******************************************************************************/ | |
66 | ||
4be44fcd | 67 | static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context) |
1da177e4 | 68 | { |
4be44fcd LB |
69 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; |
70 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
1da177e4 | 71 | |
b229cf92 | 72 | ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler); |
1da177e4 | 73 | |
1da177e4 LT |
74 | /* |
75 | * We are guaranteed by the ACPI CA initialization/shutdown code that | |
76 | * if this interrupt handler is installed, ACPI is enabled. | |
77 | */ | |
78 | ||
79 | /* | |
80 | * Fixed Events: | |
81 | * Check for and dispatch any Fixed Events that have occurred | |
82 | */ | |
4be44fcd | 83 | interrupt_handled |= acpi_ev_fixed_event_detect(); |
1da177e4 LT |
84 | |
85 | /* | |
86 | * General Purpose Events: | |
87 | * Check for and dispatch any GPEs that have occurred | |
88 | */ | |
4be44fcd | 89 | interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); |
1da177e4 | 90 | |
50eca3eb | 91 | return_UINT32(interrupt_handled); |
1da177e4 LT |
92 | } |
93 | ||
1da177e4 LT |
94 | /******************************************************************************* |
95 | * | |
96 | * FUNCTION: acpi_ev_gpe_xrupt_handler | |
97 | * | |
98 | * PARAMETERS: Context - Calling Context | |
99 | * | |
100 | * RETURN: Status code indicates whether interrupt was handled. | |
101 | * | |
102 | * DESCRIPTION: Handler for GPE Block Device interrupts | |
103 | * | |
104 | ******************************************************************************/ | |
105 | ||
4be44fcd | 106 | u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context) |
1da177e4 | 107 | { |
4be44fcd LB |
108 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; |
109 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
1da177e4 | 110 | |
b229cf92 | 111 | ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler); |
1da177e4 | 112 | |
1da177e4 LT |
113 | /* |
114 | * We are guaranteed by the ACPI CA initialization/shutdown code that | |
115 | * if this interrupt handler is installed, ACPI is enabled. | |
116 | */ | |
117 | ||
118 | /* | |
119 | * GPEs: | |
120 | * Check for and dispatch any GPEs that have occurred | |
121 | */ | |
4be44fcd | 122 | interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); |
1da177e4 | 123 | |
50eca3eb | 124 | return_UINT32(interrupt_handled); |
1da177e4 LT |
125 | } |
126 | ||
1da177e4 LT |
127 | /****************************************************************************** |
128 | * | |
129 | * FUNCTION: acpi_ev_install_sci_handler | |
130 | * | |
131 | * PARAMETERS: none | |
132 | * | |
133 | * RETURN: Status | |
134 | * | |
135 | * DESCRIPTION: Installs SCI handler. | |
136 | * | |
137 | ******************************************************************************/ | |
138 | ||
4be44fcd | 139 | u32 acpi_ev_install_sci_handler(void) |
1da177e4 | 140 | { |
4be44fcd | 141 | u32 status = AE_OK; |
1da177e4 | 142 | |
b229cf92 | 143 | ACPI_FUNCTION_TRACE(ev_install_sci_handler); |
1da177e4 | 144 | |
f3d2e786 BM |
145 | status = |
146 | acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, | |
147 | acpi_ev_sci_xrupt_handler, | |
148 | acpi_gbl_gpe_xrupt_list_head); | |
4be44fcd | 149 | return_ACPI_STATUS(status); |
1da177e4 LT |
150 | } |
151 | ||
1da177e4 LT |
152 | /****************************************************************************** |
153 | * | |
154 | * FUNCTION: acpi_ev_remove_sci_handler | |
155 | * | |
156 | * PARAMETERS: none | |
157 | * | |
158 | * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not | |
159 | * installed to begin with | |
160 | * | |
161 | * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be | |
162 | * taken. | |
163 | * | |
164 | * Note: It doesn't seem important to disable all events or set the event | |
165 | * enable registers to their original values. The OS should disable | |
166 | * the SCI interrupt level when the handler is removed, so no more | |
167 | * events will come in. | |
168 | * | |
169 | ******************************************************************************/ | |
170 | ||
4be44fcd | 171 | acpi_status acpi_ev_remove_sci_handler(void) |
1da177e4 | 172 | { |
4be44fcd | 173 | acpi_status status; |
1da177e4 | 174 | |
b229cf92 | 175 | ACPI_FUNCTION_TRACE(ev_remove_sci_handler); |
1da177e4 LT |
176 | |
177 | /* Just let the OS remove the handler and disable the level */ | |
178 | ||
f3d2e786 BM |
179 | status = |
180 | acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, | |
181 | acpi_ev_sci_xrupt_handler); | |
1da177e4 | 182 | |
4be44fcd | 183 | return_ACPI_STATUS(status); |
1da177e4 | 184 | } |