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1 | /****************************************************************************** |
2 | * | |
3 | * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the | |
4 | * extended FADT-V5 sleep registers. | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
25f044e6 | 9 | * Copyright (C) 2000 - 2013, Intel Corp. |
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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 "accommon.h" | |
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47 | |
48 | #define _COMPONENT ACPI_HARDWARE | |
49 | ACPI_MODULE_NAME("hwesleep") | |
50 | ||
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51 | /******************************************************************************* |
52 | * | |
53 | * FUNCTION: acpi_hw_execute_sleep_method | |
54 | * | |
4efeeecd | 55 | * PARAMETERS: method_pathname - Pathname of method to execute |
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56 | * integer_argument - Argument to pass to the method |
57 | * | |
58 | * RETURN: None | |
59 | * | |
60 | * DESCRIPTION: Execute a sleep/wake related method with one integer argument | |
61 | * and no return value. | |
62 | * | |
63 | ******************************************************************************/ | |
4efeeecd | 64 | void acpi_hw_execute_sleep_method(char *method_pathname, u32 integer_argument) |
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65 | { |
66 | struct acpi_object_list arg_list; | |
67 | union acpi_object arg; | |
68 | acpi_status status; | |
69 | ||
70 | ACPI_FUNCTION_TRACE(hw_execute_sleep_method); | |
71 | ||
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72 | /* One argument, integer_argument; No return value expected */ |
73 | ||
74 | arg_list.count = 1; | |
75 | arg_list.pointer = &arg; | |
76 | arg.type = ACPI_TYPE_INTEGER; | |
77 | arg.integer.value = (u64)integer_argument; | |
78 | ||
4efeeecd | 79 | status = acpi_evaluate_object(NULL, method_pathname, &arg_list, NULL); |
70958576 BM |
80 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
81 | ACPI_EXCEPTION((AE_INFO, status, "While executing method %s", | |
4efeeecd | 82 | method_pathname)); |
70958576 BM |
83 | } |
84 | ||
85 | return_VOID; | |
86 | } | |
87 | ||
88 | /******************************************************************************* | |
89 | * | |
90 | * FUNCTION: acpi_hw_extended_sleep | |
91 | * | |
92 | * PARAMETERS: sleep_state - Which sleep state to enter | |
93 | * | |
94 | * RETURN: Status | |
95 | * | |
96 | * DESCRIPTION: Enter a system sleep state via the extended FADT sleep | |
97 | * registers (V5 FADT). | |
98 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
99 | * | |
100 | ******************************************************************************/ | |
101 | ||
3f6f49c7 | 102 | acpi_status acpi_hw_extended_sleep(u8 sleep_state) |
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103 | { |
104 | acpi_status status; | |
105 | u8 sleep_type_value; | |
106 | u64 sleep_status; | |
107 | ||
108 | ACPI_FUNCTION_TRACE(hw_extended_sleep); | |
109 | ||
110 | /* Extended sleep registers must be valid */ | |
111 | ||
112 | if (!acpi_gbl_FADT.sleep_control.address || | |
113 | !acpi_gbl_FADT.sleep_status.address) { | |
114 | return_ACPI_STATUS(AE_NOT_EXIST); | |
115 | } | |
116 | ||
117 | /* Clear wake status (WAK_STS) */ | |
118 | ||
5134abfc BM |
119 | status = |
120 | acpi_write((u64)ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status); | |
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121 | if (ACPI_FAILURE(status)) { |
122 | return_ACPI_STATUS(status); | |
123 | } | |
124 | ||
125 | acpi_gbl_system_awake_and_running = FALSE; | |
126 | ||
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127 | /* Flush caches, as per ACPI specification */ |
128 | ||
129 | ACPI_FLUSH_CPU_CACHE(); | |
130 | ||
131 | /* | |
132 | * Set the SLP_TYP and SLP_EN bits. | |
133 | * | |
134 | * Note: We only use the first value returned by the \_Sx method | |
135 | * (acpi_gbl_sleep_type_a) - As per ACPI specification. | |
136 | */ | |
137 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
138 | "Entering sleep state [S%u]\n", sleep_state)); | |
139 | ||
140 | sleep_type_value = | |
141 | ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & | |
142 | ACPI_X_SLEEP_TYPE_MASK); | |
143 | ||
5134abfc | 144 | status = acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE), |
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145 | &acpi_gbl_FADT.sleep_control); |
146 | if (ACPI_FAILURE(status)) { | |
147 | return_ACPI_STATUS(status); | |
148 | } | |
149 | ||
150 | /* Wait for transition back to Working State */ | |
151 | ||
152 | do { | |
153 | status = acpi_read(&sleep_status, &acpi_gbl_FADT.sleep_status); | |
154 | if (ACPI_FAILURE(status)) { | |
155 | return_ACPI_STATUS(status); | |
156 | } | |
157 | ||
158 | } while (!(((u8)sleep_status) & ACPI_X_WAKE_STATUS)); | |
159 | ||
160 | return_ACPI_STATUS(AE_OK); | |
161 | } | |
162 | ||
163 | /******************************************************************************* | |
164 | * | |
165 | * FUNCTION: acpi_hw_extended_wake_prep | |
166 | * | |
167 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
168 | * | |
169 | * RETURN: Status | |
170 | * | |
171 | * DESCRIPTION: Perform first part of OS-independent ACPI cleanup after | |
172 | * a sleep. Called with interrupts ENABLED. | |
173 | * | |
174 | ******************************************************************************/ | |
175 | ||
3f6f49c7 | 176 | acpi_status acpi_hw_extended_wake_prep(u8 sleep_state) |
70958576 BM |
177 | { |
178 | acpi_status status; | |
179 | u8 sleep_type_value; | |
180 | ||
181 | ACPI_FUNCTION_TRACE(hw_extended_wake_prep); | |
182 | ||
183 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, | |
184 | &acpi_gbl_sleep_type_a, | |
185 | &acpi_gbl_sleep_type_b); | |
186 | if (ACPI_SUCCESS(status)) { | |
187 | sleep_type_value = | |
188 | ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & | |
189 | ACPI_X_SLEEP_TYPE_MASK); | |
190 | ||
5134abfc | 191 | (void)acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE), |
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192 | &acpi_gbl_FADT.sleep_control); |
193 | } | |
194 | ||
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195 | return_ACPI_STATUS(AE_OK); |
196 | } | |
197 | ||
198 | /******************************************************************************* | |
199 | * | |
200 | * FUNCTION: acpi_hw_extended_wake | |
201 | * | |
202 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
203 | * | |
204 | * RETURN: Status | |
205 | * | |
206 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
207 | * Called with interrupts ENABLED. | |
208 | * | |
209 | ******************************************************************************/ | |
210 | ||
3f6f49c7 | 211 | acpi_status acpi_hw_extended_wake(u8 sleep_state) |
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212 | { |
213 | ACPI_FUNCTION_TRACE(hw_extended_wake); | |
214 | ||
215 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ | |
216 | ||
217 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
218 | ||
219 | /* Execute the wake methods */ | |
220 | ||
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221 | acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WAKING); |
222 | acpi_hw_execute_sleep_method(METHOD_PATHNAME__WAK, sleep_state); | |
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223 | |
224 | /* | |
225 | * Some BIOS code assumes that WAK_STS will be cleared on resume | |
226 | * and use it to determine whether the system is rebooting or | |
227 | * resuming. Clear WAK_STS for compatibility. | |
228 | */ | |
5134abfc | 229 | (void)acpi_write((u64)ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status); |
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230 | acpi_gbl_system_awake_and_running = TRUE; |
231 | ||
4efeeecd | 232 | acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING); |
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233 | return_ACPI_STATUS(AE_OK); |
234 | } |