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70958576 BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the | |
4 | * extended FADT-V5 sleep registers. | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
c8100dc4 | 9 | * Copyright (C) 2000 - 2016, Intel Corp. |
70958576 BM |
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> | |
d6b47b12 | 46 | #include <linux/acpi.h> |
70958576 | 47 | #include "accommon.h" |
70958576 BM |
48 | |
49 | #define _COMPONENT ACPI_HARDWARE | |
50 | ACPI_MODULE_NAME("hwesleep") | |
51 | ||
70958576 BM |
52 | /******************************************************************************* |
53 | * | |
54 | * FUNCTION: acpi_hw_execute_sleep_method | |
55 | * | |
4efeeecd | 56 | * PARAMETERS: method_pathname - Pathname of method to execute |
70958576 BM |
57 | * integer_argument - Argument to pass to the method |
58 | * | |
59 | * RETURN: None | |
60 | * | |
61 | * DESCRIPTION: Execute a sleep/wake related method with one integer argument | |
62 | * and no return value. | |
63 | * | |
64 | ******************************************************************************/ | |
4efeeecd | 65 | void acpi_hw_execute_sleep_method(char *method_pathname, u32 integer_argument) |
70958576 BM |
66 | { |
67 | struct acpi_object_list arg_list; | |
68 | union acpi_object arg; | |
69 | acpi_status status; | |
70 | ||
71 | ACPI_FUNCTION_TRACE(hw_execute_sleep_method); | |
72 | ||
70958576 BM |
73 | /* One argument, integer_argument; No return value expected */ |
74 | ||
75 | arg_list.count = 1; | |
76 | arg_list.pointer = &arg; | |
77 | arg.type = ACPI_TYPE_INTEGER; | |
78 | arg.integer.value = (u64)integer_argument; | |
79 | ||
4efeeecd | 80 | status = acpi_evaluate_object(NULL, method_pathname, &arg_list, NULL); |
70958576 BM |
81 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
82 | ACPI_EXCEPTION((AE_INFO, status, "While executing method %s", | |
4efeeecd | 83 | method_pathname)); |
70958576 BM |
84 | } |
85 | ||
86 | return_VOID; | |
87 | } | |
88 | ||
89 | /******************************************************************************* | |
90 | * | |
91 | * FUNCTION: acpi_hw_extended_sleep | |
92 | * | |
93 | * PARAMETERS: sleep_state - Which sleep state to enter | |
94 | * | |
95 | * RETURN: Status | |
96 | * | |
97 | * DESCRIPTION: Enter a system sleep state via the extended FADT sleep | |
98 | * registers (V5 FADT). | |
99 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
100 | * | |
101 | ******************************************************************************/ | |
102 | ||
3f6f49c7 | 103 | acpi_status acpi_hw_extended_sleep(u8 sleep_state) |
70958576 BM |
104 | { |
105 | acpi_status status; | |
106 | u8 sleep_type_value; | |
107 | u64 sleep_status; | |
108 | ||
109 | ACPI_FUNCTION_TRACE(hw_extended_sleep); | |
110 | ||
111 | /* Extended sleep registers must be valid */ | |
112 | ||
113 | if (!acpi_gbl_FADT.sleep_control.address || | |
114 | !acpi_gbl_FADT.sleep_status.address) { | |
115 | return_ACPI_STATUS(AE_NOT_EXIST); | |
116 | } | |
117 | ||
118 | /* Clear wake status (WAK_STS) */ | |
119 | ||
1fad8738 BM |
120 | status = acpi_write((u64)ACPI_X_WAKE_STATUS, |
121 | &acpi_gbl_FADT.sleep_status); | |
70958576 BM |
122 | if (ACPI_FAILURE(status)) { |
123 | return_ACPI_STATUS(status); | |
124 | } | |
125 | ||
126 | acpi_gbl_system_awake_and_running = FALSE; | |
127 | ||
70958576 BM |
128 | /* Flush caches, as per ACPI specification */ |
129 | ||
130 | ACPI_FLUSH_CPU_CACHE(); | |
131 | ||
d6b47b12 BG |
132 | status = acpi_os_prepare_extended_sleep(sleep_state, |
133 | acpi_gbl_sleep_type_a, | |
134 | acpi_gbl_sleep_type_b); | |
135 | if (ACPI_SKIP(status)) | |
136 | return_ACPI_STATUS(AE_OK); | |
137 | if (ACPI_FAILURE(status)) | |
138 | return_ACPI_STATUS(status); | |
139 | ||
70958576 BM |
140 | /* |
141 | * Set the SLP_TYP and SLP_EN bits. | |
142 | * | |
143 | * Note: We only use the first value returned by the \_Sx method | |
144 | * (acpi_gbl_sleep_type_a) - As per ACPI specification. | |
145 | */ | |
146 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
147 | "Entering sleep state [S%u]\n", sleep_state)); | |
148 | ||
149 | sleep_type_value = | |
150 | ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & | |
151 | ACPI_X_SLEEP_TYPE_MASK); | |
152 | ||
5134abfc | 153 | status = acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE), |
70958576 BM |
154 | &acpi_gbl_FADT.sleep_control); |
155 | if (ACPI_FAILURE(status)) { | |
156 | return_ACPI_STATUS(status); | |
157 | } | |
158 | ||
159 | /* Wait for transition back to Working State */ | |
160 | ||
161 | do { | |
162 | status = acpi_read(&sleep_status, &acpi_gbl_FADT.sleep_status); | |
163 | if (ACPI_FAILURE(status)) { | |
164 | return_ACPI_STATUS(status); | |
165 | } | |
166 | ||
167 | } while (!(((u8)sleep_status) & ACPI_X_WAKE_STATUS)); | |
168 | ||
169 | return_ACPI_STATUS(AE_OK); | |
170 | } | |
171 | ||
172 | /******************************************************************************* | |
173 | * | |
174 | * FUNCTION: acpi_hw_extended_wake_prep | |
175 | * | |
176 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
177 | * | |
178 | * RETURN: Status | |
179 | * | |
180 | * DESCRIPTION: Perform first part of OS-independent ACPI cleanup after | |
181 | * a sleep. Called with interrupts ENABLED. | |
182 | * | |
183 | ******************************************************************************/ | |
184 | ||
3f6f49c7 | 185 | acpi_status acpi_hw_extended_wake_prep(u8 sleep_state) |
70958576 BM |
186 | { |
187 | acpi_status status; | |
188 | u8 sleep_type_value; | |
189 | ||
190 | ACPI_FUNCTION_TRACE(hw_extended_wake_prep); | |
191 | ||
192 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, | |
193 | &acpi_gbl_sleep_type_a, | |
194 | &acpi_gbl_sleep_type_b); | |
195 | if (ACPI_SUCCESS(status)) { | |
196 | sleep_type_value = | |
197 | ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & | |
198 | ACPI_X_SLEEP_TYPE_MASK); | |
199 | ||
5134abfc | 200 | (void)acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE), |
70958576 BM |
201 | &acpi_gbl_FADT.sleep_control); |
202 | } | |
203 | ||
70958576 BM |
204 | return_ACPI_STATUS(AE_OK); |
205 | } | |
206 | ||
207 | /******************************************************************************* | |
208 | * | |
209 | * FUNCTION: acpi_hw_extended_wake | |
210 | * | |
211 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
212 | * | |
213 | * RETURN: Status | |
214 | * | |
215 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
216 | * Called with interrupts ENABLED. | |
217 | * | |
218 | ******************************************************************************/ | |
219 | ||
3f6f49c7 | 220 | acpi_status acpi_hw_extended_wake(u8 sleep_state) |
70958576 BM |
221 | { |
222 | ACPI_FUNCTION_TRACE(hw_extended_wake); | |
223 | ||
224 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ | |
225 | ||
226 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
227 | ||
228 | /* Execute the wake methods */ | |
229 | ||
4efeeecd BM |
230 | acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WAKING); |
231 | acpi_hw_execute_sleep_method(METHOD_PATHNAME__WAK, sleep_state); | |
70958576 BM |
232 | |
233 | /* | |
234 | * Some BIOS code assumes that WAK_STS will be cleared on resume | |
235 | * and use it to determine whether the system is rebooting or | |
236 | * resuming. Clear WAK_STS for compatibility. | |
237 | */ | |
5134abfc | 238 | (void)acpi_write((u64)ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status); |
70958576 BM |
239 | acpi_gbl_system_awake_and_running = TRUE; |
240 | ||
4efeeecd | 241 | acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING); |
70958576 BM |
242 | return_ACPI_STATUS(AE_OK); |
243 | } |