Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sleep.c - ACPI sleep support. |
| 3 | * |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 4 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> |
| 6 | * Copyright (c) 2000-2003 Patrick Mochel |
| 7 | * Copyright (c) 2003 Open Source Development Lab |
| 8 | * |
| 9 | * This file is released under the GPLv2. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/dmi.h> |
| 16 | #include <linux/device.h> |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 17 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/suspend.h> |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 19 | #include <linux/reboot.h> |
H. Peter Anvin | d1ee433 | 2011-02-14 15:42:46 -0800 | [diff] [blame] | 20 | #include <linux/acpi.h> |
Lin Ming | a2ef5c4 | 2012-03-21 10:58:46 +0800 | [diff] [blame] | 21 | #include <linux/module.h> |
Sudeep Holla | 504997c | 2016-02-17 12:03:23 +0000 | [diff] [blame] | 22 | #include <linux/syscore_ops.h> |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 23 | #include <asm/io.h> |
Todd E Brandt | bb3632c | 2014-06-06 05:40:17 -0700 | [diff] [blame] | 24 | #include <trace/events/power.h> |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 25 | |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 26 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "sleep.h" |
| 28 | |
Chen Yu | 1373718 | 2016-03-22 08:51:10 +0800 | [diff] [blame] | 29 | /* |
| 30 | * Some HW-full platforms do not have _S5, so they may need |
| 31 | * to leverage efi power off for a shutdown. |
| 32 | */ |
| 33 | bool acpi_no_s5; |
Stephen Hemminger | 01eac60 | 2010-10-18 18:47:25 -0700 | [diff] [blame] | 34 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 36 | static void acpi_sleep_tts_switch(u32 acpi_state) |
| 37 | { |
Jiang Liu | 0db9820 | 2013-06-29 00:24:39 +0800 | [diff] [blame] | 38 | acpi_status status; |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 39 | |
Jiang Liu | 0db9820 | 2013-06-29 00:24:39 +0800 | [diff] [blame] | 40 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 41 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 42 | /* |
| 43 | * OS can't evaluate the _TTS object correctly. Some warning |
| 44 | * message will be printed. But it won't break anything. |
| 45 | */ |
| 46 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); |
| 47 | } |
| 48 | } |
| 49 | |
Ocean He | 2c85025 | 2016-06-27 14:50:16 +0000 | [diff] [blame] | 50 | static void acpi_sleep_pts_switch(u32 acpi_state) |
| 51 | { |
| 52 | acpi_status status; |
| 53 | |
| 54 | status = acpi_execute_simple_method(NULL, "\\_PTS", acpi_state); |
| 55 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 56 | /* |
| 57 | * OS can't evaluate the _PTS object correctly. Some warning |
| 58 | * message will be printed. But it won't break anything. |
| 59 | */ |
| 60 | printk(KERN_NOTICE "Failure in evaluating _PTS object\n"); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | static int sleep_notify_reboot(struct notifier_block *this, |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 65 | unsigned long code, void *x) |
| 66 | { |
| 67 | acpi_sleep_tts_switch(ACPI_STATE_S5); |
Ocean He | 2c85025 | 2016-06-27 14:50:16 +0000 | [diff] [blame] | 68 | |
| 69 | acpi_sleep_pts_switch(ACPI_STATE_S5); |
| 70 | |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 71 | return NOTIFY_DONE; |
| 72 | } |
| 73 | |
Ocean He | 2c85025 | 2016-06-27 14:50:16 +0000 | [diff] [blame] | 74 | static struct notifier_block sleep_notifier = { |
| 75 | .notifier_call = sleep_notify_reboot, |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 76 | .next = NULL, |
| 77 | .priority = 0, |
| 78 | }; |
| 79 | |
Rafael J. Wysocki | c9b6c8f | 2008-01-08 00:10:57 +0100 | [diff] [blame] | 80 | static int acpi_sleep_prepare(u32 acpi_state) |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 81 | { |
| 82 | #ifdef CONFIG_ACPI_SLEEP |
| 83 | /* do we have a wakeup address for S2 and S3? */ |
| 84 | if (acpi_state == ACPI_STATE_S3) { |
H. Peter Anvin | 319b6ff | 2012-05-30 12:33:41 +0300 | [diff] [blame] | 85 | if (!acpi_wakeup_address) |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 86 | return -EFAULT; |
Rafael J. Wysocki | e3e9b57 | 2016-01-04 22:05:20 +0100 | [diff] [blame] | 87 | acpi_set_waking_vector(acpi_wakeup_address); |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 88 | |
| 89 | } |
| 90 | ACPI_FLUSH_CPU_CACHE(); |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 91 | #endif |
Rafael J. Wysocki | c9b6c8f | 2008-01-08 00:10:57 +0100 | [diff] [blame] | 92 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
| 93 | acpi_state); |
Rafael J. Wysocki | 78f5f02 | 2010-07-06 22:09:38 -0400 | [diff] [blame] | 94 | acpi_enable_wakeup_devices(acpi_state); |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 95 | acpi_enter_sleep_state_prep(acpi_state); |
| 96 | return 0; |
| 97 | } |
| 98 | |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 99 | static bool acpi_sleep_state_supported(u8 sleep_state) |
| 100 | { |
| 101 | acpi_status status; |
| 102 | u8 type_a, type_b; |
| 103 | |
| 104 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); |
| 105 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware |
| 106 | || (acpi_gbl_FADT.sleep_control.address |
| 107 | && acpi_gbl_FADT.sleep_status.address)); |
| 108 | } |
| 109 | |
Rafael J. Wysocki | 5d1e072 | 2008-10-22 14:58:43 -0400 | [diff] [blame] | 110 | #ifdef CONFIG_ACPI_SLEEP |
Jan Beulich | 091aad6 | 2010-12-07 14:52:25 +0000 | [diff] [blame] | 111 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
Rafael J. Wysocki | a6ae759 | 2012-11-02 01:40:53 +0100 | [diff] [blame] | 112 | |
| 113 | u32 acpi_target_system_state(void) |
| 114 | { |
| 115 | return acpi_target_sleep_state; |
| 116 | } |
Rafael J. Wysocki | fad16dd | 2014-05-08 23:22:15 +0200 | [diff] [blame] | 117 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
Rafael J. Wysocki | a6ae759 | 2012-11-02 01:40:53 +0100 | [diff] [blame] | 118 | |
Rafael J. Wysocki | a5ca734 | 2012-07-23 21:01:02 +0200 | [diff] [blame] | 119 | static bool pwr_btn_event_pending; |
Jan Beulich | 091aad6 | 2010-12-07 14:52:25 +0000 | [diff] [blame] | 120 | |
Zhang Rui | d7f0eea | 2009-12-30 15:36:42 +0800 | [diff] [blame] | 121 | /* |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 122 | * The ACPI specification wants us to save NVS memory regions during hibernation |
| 123 | * and to restore them during the subsequent resume. Windows does that also for |
| 124 | * suspend to RAM. However, it is known that this mechanism does not work on |
| 125 | * all machines, so we allow the user to disable it with the help of the |
| 126 | * 'acpi_sleep=nonvs' kernel command line option. |
| 127 | */ |
| 128 | static bool nvs_nosave; |
| 129 | |
| 130 | void __init acpi_nvs_nosave(void) |
| 131 | { |
| 132 | nvs_nosave = true; |
| 133 | } |
| 134 | |
| 135 | /* |
Kristen Carlson Accardi | 1bad2f1 | 2012-10-26 13:39:15 +0200 | [diff] [blame] | 136 | * The ACPI specification wants us to save NVS memory regions during hibernation |
| 137 | * but says nothing about saving NVS during S3. Not all versions of Windows |
| 138 | * save NVS on S3 suspend either, and it is clear that not all systems need |
| 139 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the |
| 140 | * user to disable saving NVS on S3 if their system does not require it, but |
| 141 | * continue to save/restore NVS for S4 as specified. |
| 142 | */ |
| 143 | static bool nvs_nosave_s3; |
| 144 | |
| 145 | void __init acpi_nvs_nosave_s3(void) |
| 146 | { |
| 147 | nvs_nosave_s3 = true; |
| 148 | } |
| 149 | |
| 150 | /* |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 151 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the |
| 152 | * user to request that behavior by using the 'acpi_old_suspend_ordering' |
| 153 | * kernel command line option that causes the following variable to be set. |
| 154 | */ |
| 155 | static bool old_suspend_ordering; |
| 156 | |
| 157 | void __init acpi_old_suspend_ordering(void) |
| 158 | { |
| 159 | old_suspend_ordering = true; |
| 160 | } |
| 161 | |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 162 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
| 163 | { |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 164 | acpi_old_suspend_ordering(); |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 165 | return 0; |
| 166 | } |
| 167 | |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 168 | static int __init init_nvs_nosave(const struct dmi_system_id *d) |
| 169 | { |
| 170 | acpi_nvs_nosave(); |
| 171 | return 0; |
| 172 | } |
| 173 | |
Sachin Kamat | 3e4376f | 2013-08-07 17:16:57 +0530 | [diff] [blame] | 174 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 175 | { |
| 176 | .callback = init_old_suspend_ordering, |
| 177 | .ident = "Abit KN9 (nForce4 variant)", |
| 178 | .matches = { |
| 179 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), |
| 180 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), |
| 181 | }, |
| 182 | }, |
Rafael J. Wysocki | 4fb507b | 2008-10-14 22:54:06 +0200 | [diff] [blame] | 183 | { |
| 184 | .callback = init_old_suspend_ordering, |
| 185 | .ident = "HP xw4600 Workstation", |
| 186 | .matches = { |
| 187 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 188 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), |
| 189 | }, |
| 190 | }, |
Rafael J. Wysocki | 65df784 | 2008-11-26 17:53:13 -0500 | [diff] [blame] | 191 | { |
Andy Whitcroft | a140449 | 2009-02-11 18:11:22 +0000 | [diff] [blame] | 192 | .callback = init_old_suspend_ordering, |
| 193 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", |
| 194 | .matches = { |
| 195 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), |
| 196 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), |
| 197 | }, |
| 198 | }, |
Zhang Rui | 45e7798 | 2009-03-15 22:13:44 -0400 | [diff] [blame] | 199 | { |
Zhao Yakui | 2a9ef8e | 2009-03-18 16:36:25 +0800 | [diff] [blame] | 200 | .callback = init_old_suspend_ordering, |
| 201 | .ident = "Panasonic CF51-2L", |
| 202 | .matches = { |
| 203 | DMI_MATCH(DMI_BOARD_VENDOR, |
| 204 | "Matsushita Electric Industrial Co.,Ltd."), |
| 205 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), |
| 206 | }, |
| 207 | }, |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 208 | { |
| 209 | .callback = init_nvs_nosave, |
Joseph Salisbury | 66f2fda | 2013-02-05 00:16:29 +0000 | [diff] [blame] | 210 | .ident = "Sony Vaio VGN-FW41E_H", |
| 211 | .matches = { |
| 212 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 213 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), |
| 214 | }, |
| 215 | }, |
| 216 | { |
| 217 | .callback = init_nvs_nosave, |
Dave Jones | d11c78e | 2011-10-19 23:15:11 +0200 | [diff] [blame] | 218 | .ident = "Sony Vaio VGN-FW21E", |
| 219 | .matches = { |
| 220 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 221 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), |
| 222 | }, |
| 223 | }, |
| 224 | { |
| 225 | .callback = init_nvs_nosave, |
Fabio Valentini | 469dd1c | 2013-03-11 19:16:34 +0000 | [diff] [blame] | 226 | .ident = "Sony Vaio VGN-FW21M", |
| 227 | .matches = { |
| 228 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 229 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), |
| 230 | }, |
| 231 | }, |
| 232 | { |
| 233 | .callback = init_nvs_nosave, |
Dave Jones | ddf6ce4 | 2011-11-03 00:58:59 +0100 | [diff] [blame] | 234 | .ident = "Sony Vaio VPCEB17FX", |
| 235 | .matches = { |
| 236 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 237 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), |
| 238 | }, |
| 239 | }, |
| 240 | { |
| 241 | .callback = init_nvs_nosave, |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 242 | .ident = "Sony Vaio VGN-SR11M", |
| 243 | .matches = { |
| 244 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 245 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), |
| 246 | }, |
| 247 | }, |
| 248 | { |
| 249 | .callback = init_nvs_nosave, |
| 250 | .ident = "Everex StepNote Series", |
| 251 | .matches = { |
| 252 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), |
| 253 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), |
| 254 | }, |
| 255 | }, |
Rafael J. Wysocki | af48931 | 2010-10-17 21:01:21 +0200 | [diff] [blame] | 256 | { |
| 257 | .callback = init_nvs_nosave, |
| 258 | .ident = "Sony Vaio VPCEB1Z1E", |
| 259 | .matches = { |
| 260 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 261 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), |
| 262 | }, |
| 263 | }, |
Rafael J. Wysocki | 291a73c | 2010-12-12 21:10:42 +0100 | [diff] [blame] | 264 | { |
| 265 | .callback = init_nvs_nosave, |
| 266 | .ident = "Sony Vaio VGN-NW130D", |
| 267 | .matches = { |
| 268 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 269 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), |
| 270 | }, |
| 271 | }, |
Rafael J. Wysocki | 7b33070 | 2011-01-06 23:37:01 +0100 | [diff] [blame] | 272 | { |
| 273 | .callback = init_nvs_nosave, |
Lan Tianyu | 93f7708 | 2012-01-21 09:23:56 +0800 | [diff] [blame] | 274 | .ident = "Sony Vaio VPCCW29FX", |
| 275 | .matches = { |
| 276 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 277 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), |
| 278 | }, |
| 279 | }, |
| 280 | { |
| 281 | .callback = init_nvs_nosave, |
Rafael J. Wysocki | 7b33070 | 2011-01-06 23:37:01 +0100 | [diff] [blame] | 282 | .ident = "Averatec AV1020-ED2", |
| 283 | .matches = { |
| 284 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), |
| 285 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), |
| 286 | }, |
| 287 | }, |
Zhang Rui | bb0c5ed | 2011-07-30 01:40:48 -0400 | [diff] [blame] | 288 | { |
| 289 | .callback = init_old_suspend_ordering, |
| 290 | .ident = "Asus A8N-SLI DELUXE", |
| 291 | .matches = { |
| 292 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| 293 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), |
| 294 | }, |
| 295 | }, |
| 296 | { |
| 297 | .callback = init_old_suspend_ordering, |
| 298 | .ident = "Asus A8N-SLI Premium", |
| 299 | .matches = { |
| 300 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| 301 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), |
| 302 | }, |
| 303 | }, |
Rafael J. Wysocki | 89e8ea1 | 2011-10-06 20:35:03 +0200 | [diff] [blame] | 304 | { |
| 305 | .callback = init_nvs_nosave, |
| 306 | .ident = "Sony Vaio VGN-SR26GN_P", |
| 307 | .matches = { |
| 308 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 309 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), |
| 310 | }, |
| 311 | }, |
Bogdan Radulescu | 731b25a | 2011-10-06 20:35:12 +0200 | [diff] [blame] | 312 | { |
| 313 | .callback = init_nvs_nosave, |
Lan Tianyu | 876ab79 | 2012-11-21 23:12:12 +0100 | [diff] [blame] | 314 | .ident = "Sony Vaio VPCEB1S1E", |
| 315 | .matches = { |
| 316 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 317 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), |
| 318 | }, |
| 319 | }, |
| 320 | { |
| 321 | .callback = init_nvs_nosave, |
Bogdan Radulescu | 731b25a | 2011-10-06 20:35:12 +0200 | [diff] [blame] | 322 | .ident = "Sony Vaio VGN-FW520F", |
| 323 | .matches = { |
| 324 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 325 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), |
| 326 | }, |
| 327 | }, |
Keng-Yu Lin | 5a50a7c | 2011-12-02 00:04:23 +0100 | [diff] [blame] | 328 | { |
| 329 | .callback = init_nvs_nosave, |
| 330 | .ident = "Asus K54C", |
| 331 | .matches = { |
| 332 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), |
| 333 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), |
| 334 | }, |
| 335 | }, |
| 336 | { |
| 337 | .callback = init_nvs_nosave, |
| 338 | .ident = "Asus K54HR", |
| 339 | .matches = { |
| 340 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), |
| 341 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), |
| 342 | }, |
| 343 | }, |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 344 | {}, |
| 345 | }; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 346 | |
Jan Beulich | 8b691c9 | 2015-01-23 08:12:06 +0000 | [diff] [blame] | 347 | static void __init acpi_sleep_dmi_check(void) |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 348 | { |
Lan Tianyu | 821d6f0 | 2014-07-23 14:42:33 +0800 | [diff] [blame] | 349 | int year; |
| 350 | |
| 351 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012) |
| 352 | acpi_nvs_nosave_s3(); |
| 353 | |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 354 | dmi_check_system(acpisleep_dmi_table); |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
| 359 | */ |
| 360 | static int acpi_pm_freeze(void) |
| 361 | { |
| 362 | acpi_disable_all_gpes(); |
| 363 | acpi_os_wait_events_complete(); |
| 364 | acpi_ec_block_transactions(); |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. |
| 370 | */ |
| 371 | static int acpi_pm_pre_suspend(void) |
| 372 | { |
| 373 | acpi_pm_freeze(); |
| 374 | return suspend_nvs_save(); |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * __acpi_pm_prepare - Prepare the platform to enter the target state. |
| 379 | * |
| 380 | * If necessary, set the firmware waking vector and do arch-specific |
| 381 | * nastiness to get the wakeup code to the waking vector. |
| 382 | */ |
| 383 | static int __acpi_pm_prepare(void) |
| 384 | { |
| 385 | int error = acpi_sleep_prepare(acpi_target_sleep_state); |
| 386 | if (error) |
| 387 | acpi_target_sleep_state = ACPI_STATE_S0; |
| 388 | |
| 389 | return error; |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * acpi_pm_prepare - Prepare the platform to enter the target sleep |
| 394 | * state and disable the GPEs. |
| 395 | */ |
| 396 | static int acpi_pm_prepare(void) |
| 397 | { |
| 398 | int error = __acpi_pm_prepare(); |
| 399 | if (!error) |
| 400 | error = acpi_pm_pre_suspend(); |
| 401 | |
| 402 | return error; |
| 403 | } |
| 404 | |
| 405 | static int find_powerf_dev(struct device *dev, void *data) |
| 406 | { |
| 407 | struct acpi_device *device = to_acpi_device(dev); |
| 408 | const char *hid = acpi_device_hid(device); |
| 409 | |
| 410 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); |
| 411 | } |
| 412 | |
| 413 | /** |
| 414 | * acpi_pm_finish - Instruct the platform to leave a sleep state. |
| 415 | * |
| 416 | * This is called after we wake back up (or if entering the sleep state |
| 417 | * failed). |
| 418 | */ |
| 419 | static void acpi_pm_finish(void) |
| 420 | { |
| 421 | struct device *pwr_btn_dev; |
| 422 | u32 acpi_state = acpi_target_sleep_state; |
| 423 | |
| 424 | acpi_ec_unblock_transactions(); |
| 425 | suspend_nvs_free(); |
| 426 | |
| 427 | if (acpi_state == ACPI_STATE_S0) |
| 428 | return; |
| 429 | |
| 430 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
| 431 | acpi_state); |
| 432 | acpi_disable_wakeup_devices(acpi_state); |
| 433 | acpi_leave_sleep_state(acpi_state); |
| 434 | |
| 435 | /* reset firmware waking vector */ |
Rafael J. Wysocki | e3e9b57 | 2016-01-04 22:05:20 +0100 | [diff] [blame] | 436 | acpi_set_waking_vector(0); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 437 | |
| 438 | acpi_target_sleep_state = ACPI_STATE_S0; |
| 439 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 440 | acpi_resume_power_resources(); |
| 441 | |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 442 | /* If we were woken with the fixed power button, provide a small |
| 443 | * hint to userspace in the form of a wakeup event on the fixed power |
| 444 | * button device (if it can be found). |
| 445 | * |
| 446 | * We delay the event generation til now, as the PM layer requires |
| 447 | * timekeeping to be running before we generate events. */ |
| 448 | if (!pwr_btn_event_pending) |
| 449 | return; |
| 450 | |
| 451 | pwr_btn_event_pending = false; |
| 452 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, |
| 453 | find_powerf_dev); |
| 454 | if (pwr_btn_dev) { |
| 455 | pm_wakeup_event(pwr_btn_dev, 0); |
| 456 | put_device(pwr_btn_dev); |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | /** |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 461 | * acpi_pm_start - Start system PM transition. |
| 462 | */ |
| 463 | static void acpi_pm_start(u32 acpi_state) |
| 464 | { |
| 465 | acpi_target_sleep_state = acpi_state; |
| 466 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
| 467 | acpi_scan_lock_acquire(); |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * acpi_pm_end - Finish up system PM transition. |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 472 | */ |
| 473 | static void acpi_pm_end(void) |
| 474 | { |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 475 | acpi_scan_lock_release(); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 476 | /* |
| 477 | * This is necessary in case acpi_pm_finish() is not called during a |
| 478 | * failing transition to a sleep state. |
| 479 | */ |
| 480 | acpi_target_sleep_state = ACPI_STATE_S0; |
| 481 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
| 482 | } |
| 483 | #else /* !CONFIG_ACPI_SLEEP */ |
| 484 | #define acpi_target_sleep_state ACPI_STATE_S0 |
| 485 | static inline void acpi_sleep_dmi_check(void) {} |
| 486 | #endif /* CONFIG_ACPI_SLEEP */ |
| 487 | |
| 488 | #ifdef CONFIG_SUSPEND |
| 489 | static u32 acpi_suspend_states[] = { |
| 490 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
| 491 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, |
| 492 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, |
| 493 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
| 494 | }; |
| 495 | |
| 496 | /** |
| 497 | * acpi_suspend_begin - Set the target system sleep state to the state |
| 498 | * associated with given @pm_state, if supported. |
| 499 | */ |
| 500 | static int acpi_suspend_begin(suspend_state_t pm_state) |
| 501 | { |
| 502 | u32 acpi_state = acpi_suspend_states[pm_state]; |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 503 | int error; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 504 | |
| 505 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
| 506 | if (error) |
| 507 | return error; |
| 508 | |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 509 | if (!sleep_states[acpi_state]) { |
| 510 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); |
| 511 | return -ENOSYS; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 512 | } |
Rafael J. Wysocki | ef25ba0 | 2015-10-07 00:49:34 +0200 | [diff] [blame] | 513 | if (acpi_state > ACPI_STATE_S1) |
| 514 | pm_set_suspend_via_firmware(); |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 515 | |
| 516 | acpi_pm_start(acpi_state); |
| 517 | return 0; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | /** |
| 521 | * acpi_suspend_enter - Actually enter a sleep state. |
| 522 | * @pm_state: ignored |
| 523 | * |
| 524 | * Flush caches and go to sleep. For STR we have to call arch-specific |
| 525 | * assembly, which in turn call acpi_enter_sleep_state(). |
| 526 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
| 527 | */ |
| 528 | static int acpi_suspend_enter(suspend_state_t pm_state) |
| 529 | { |
| 530 | acpi_status status = AE_OK; |
| 531 | u32 acpi_state = acpi_target_sleep_state; |
| 532 | int error; |
| 533 | |
| 534 | ACPI_FLUSH_CPU_CACHE(); |
| 535 | |
Todd E Brandt | bb3632c | 2014-06-06 05:40:17 -0700 | [diff] [blame] | 536 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 537 | switch (acpi_state) { |
| 538 | case ACPI_STATE_S1: |
| 539 | barrier(); |
| 540 | status = acpi_enter_sleep_state(acpi_state); |
| 541 | break; |
| 542 | |
| 543 | case ACPI_STATE_S3: |
Konrad Rzeszutek Wilk | d6a77ea | 2013-05-14 17:09:16 +0000 | [diff] [blame] | 544 | if (!acpi_suspend_lowlevel) |
| 545 | return -ENOSYS; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 546 | error = acpi_suspend_lowlevel(); |
| 547 | if (error) |
| 548 | return error; |
| 549 | pr_info(PREFIX "Low-level resume complete\n"); |
Rafael J. Wysocki | ef25ba0 | 2015-10-07 00:49:34 +0200 | [diff] [blame] | 550 | pm_set_resume_via_firmware(); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 551 | break; |
| 552 | } |
Todd E Brandt | bb3632c | 2014-06-06 05:40:17 -0700 | [diff] [blame] | 553 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 554 | |
| 555 | /* This violates the spec but is required for bug compatibility. */ |
| 556 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); |
| 557 | |
| 558 | /* Reprogram control registers */ |
| 559 | acpi_leave_sleep_state_prep(acpi_state); |
| 560 | |
| 561 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
| 562 | * of the OSPM to clear the status bit [ implying that the |
| 563 | * POWER_BUTTON event should not reach userspace ] |
| 564 | * |
| 565 | * However, we do generate a small hint for userspace in the form of |
| 566 | * a wakeup event. We flag this condition for now and generate the |
| 567 | * event later, as we're currently too early in resume to be able to |
| 568 | * generate wakeup events. |
| 569 | */ |
| 570 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
Al Stone | 51468a9 | 2013-11-20 15:45:51 -0700 | [diff] [blame] | 571 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 572 | |
| 573 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); |
| 574 | |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 575 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 576 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
| 577 | /* Flag for later */ |
| 578 | pwr_btn_event_pending = true; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | /* |
| 583 | * Disable and clear GPE status before interrupt is enabled. Some GPEs |
| 584 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. |
| 585 | * acpi_leave_sleep_state will reenable specific GPEs later |
| 586 | */ |
| 587 | acpi_disable_all_gpes(); |
| 588 | /* Allow EC transactions to happen. */ |
Lv Zheng | c2b46d6 | 2016-08-03 16:01:36 +0800 | [diff] [blame] | 589 | acpi_ec_unblock_transactions(); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 590 | |
| 591 | suspend_nvs_restore(); |
| 592 | |
| 593 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
| 594 | } |
| 595 | |
| 596 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
| 597 | { |
| 598 | u32 acpi_state; |
| 599 | |
| 600 | switch (pm_state) { |
| 601 | case PM_SUSPEND_ON: |
| 602 | case PM_SUSPEND_STANDBY: |
| 603 | case PM_SUSPEND_MEM: |
| 604 | acpi_state = acpi_suspend_states[pm_state]; |
| 605 | |
| 606 | return sleep_states[acpi_state]; |
| 607 | default: |
| 608 | return 0; |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | static const struct platform_suspend_ops acpi_suspend_ops = { |
| 613 | .valid = acpi_suspend_state_valid, |
| 614 | .begin = acpi_suspend_begin, |
| 615 | .prepare_late = acpi_pm_prepare, |
| 616 | .enter = acpi_suspend_enter, |
| 617 | .wake = acpi_pm_finish, |
| 618 | .end = acpi_pm_end, |
| 619 | }; |
| 620 | |
| 621 | /** |
| 622 | * acpi_suspend_begin_old - Set the target system sleep state to the |
| 623 | * state associated with given @pm_state, if supported, and |
| 624 | * execute the _PTS control method. This function is used if the |
| 625 | * pre-ACPI 2.0 suspend ordering has been requested. |
| 626 | */ |
| 627 | static int acpi_suspend_begin_old(suspend_state_t pm_state) |
| 628 | { |
| 629 | int error = acpi_suspend_begin(pm_state); |
| 630 | if (!error) |
| 631 | error = __acpi_pm_prepare(); |
| 632 | |
| 633 | return error; |
| 634 | } |
| 635 | |
| 636 | /* |
| 637 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has |
| 638 | * been requested. |
| 639 | */ |
| 640 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
| 641 | .valid = acpi_suspend_state_valid, |
| 642 | .begin = acpi_suspend_begin_old, |
| 643 | .prepare_late = acpi_pm_pre_suspend, |
| 644 | .enter = acpi_suspend_enter, |
| 645 | .wake = acpi_pm_finish, |
| 646 | .end = acpi_pm_end, |
| 647 | .recover = acpi_pm_finish, |
| 648 | }; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 649 | |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 650 | static int acpi_freeze_begin(void) |
| 651 | { |
| 652 | acpi_scan_lock_acquire(); |
| 653 | return 0; |
| 654 | } |
| 655 | |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 656 | static int acpi_freeze_prepare(void) |
| 657 | { |
Chen Yu | 7b02cce | 2015-03-27 18:08:48 +0800 | [diff] [blame] | 658 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 659 | acpi_enable_all_wakeup_gpes(); |
Rafael J. Wysocki | c52fa70 | 2014-12-01 23:51:13 +0100 | [diff] [blame] | 660 | acpi_os_wait_events_complete(); |
Chen Yu | 8c01275 | 2015-10-25 01:02:46 +0800 | [diff] [blame] | 661 | if (acpi_sci_irq_valid()) |
| 662 | enable_irq_wake(acpi_sci_irq); |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 663 | return 0; |
| 664 | } |
| 665 | |
| 666 | static void acpi_freeze_restore(void) |
| 667 | { |
Chen Yu | 7b02cce | 2015-03-27 18:08:48 +0800 | [diff] [blame] | 668 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
Chen Yu | 8c01275 | 2015-10-25 01:02:46 +0800 | [diff] [blame] | 669 | if (acpi_sci_irq_valid()) |
| 670 | disable_irq_wake(acpi_sci_irq); |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 671 | acpi_enable_all_runtime_gpes(); |
| 672 | } |
| 673 | |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 674 | static void acpi_freeze_end(void) |
| 675 | { |
| 676 | acpi_scan_lock_release(); |
| 677 | } |
| 678 | |
| 679 | static const struct platform_freeze_ops acpi_freeze_ops = { |
| 680 | .begin = acpi_freeze_begin, |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 681 | .prepare = acpi_freeze_prepare, |
| 682 | .restore = acpi_freeze_restore, |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 683 | .end = acpi_freeze_end, |
| 684 | }; |
| 685 | |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 686 | static void acpi_sleep_suspend_setup(void) |
| 687 | { |
| 688 | int i; |
| 689 | |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 690 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
| 691 | if (acpi_sleep_state_supported(i)) |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 692 | sleep_states[i] = 1; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 693 | |
| 694 | suspend_set_ops(old_suspend_ordering ? |
| 695 | &acpi_suspend_ops_old : &acpi_suspend_ops); |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 696 | freeze_set_ops(&acpi_freeze_ops); |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 697 | } |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 698 | |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 699 | #else /* !CONFIG_SUSPEND */ |
| 700 | static inline void acpi_sleep_suspend_setup(void) {} |
| 701 | #endif /* !CONFIG_SUSPEND */ |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 702 | |
Sudeep Holla | 504997c | 2016-02-17 12:03:23 +0000 | [diff] [blame] | 703 | #ifdef CONFIG_PM_SLEEP |
| 704 | static u32 saved_bm_rld; |
| 705 | |
| 706 | static int acpi_save_bm_rld(void) |
| 707 | { |
| 708 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); |
| 709 | return 0; |
| 710 | } |
| 711 | |
| 712 | static void acpi_restore_bm_rld(void) |
| 713 | { |
| 714 | u32 resumed_bm_rld = 0; |
| 715 | |
| 716 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); |
| 717 | if (resumed_bm_rld == saved_bm_rld) |
| 718 | return; |
| 719 | |
| 720 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); |
| 721 | } |
| 722 | |
| 723 | static struct syscore_ops acpi_sleep_syscore_ops = { |
| 724 | .suspend = acpi_save_bm_rld, |
| 725 | .resume = acpi_restore_bm_rld, |
| 726 | }; |
| 727 | |
| 728 | void acpi_sleep_syscore_init(void) |
| 729 | { |
| 730 | register_syscore_ops(&acpi_sleep_syscore_ops); |
| 731 | } |
| 732 | #else |
| 733 | static inline void acpi_sleep_syscore_init(void) {} |
| 734 | #endif /* CONFIG_PM_SLEEP */ |
| 735 | |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 736 | #ifdef CONFIG_HIBERNATION |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 737 | static unsigned long s4_hardware_signature; |
| 738 | static struct acpi_table_facs *facs; |
| 739 | static bool nosigcheck; |
| 740 | |
| 741 | void __init acpi_no_s4_hw_signature(void) |
| 742 | { |
| 743 | nosigcheck = true; |
| 744 | } |
| 745 | |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 746 | static int acpi_hibernation_begin(void) |
Rafael J. Wysocki | 74f270a | 2007-10-18 03:04:42 -0700 | [diff] [blame] | 747 | { |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 748 | int error; |
| 749 | |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 750 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 751 | if (!error) |
| 752 | acpi_pm_start(ACPI_STATE_S4); |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 753 | |
| 754 | return error; |
| 755 | } |
| 756 | |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 757 | static int acpi_hibernation_enter(void) |
| 758 | { |
| 759 | acpi_status status = AE_OK; |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 760 | |
| 761 | ACPI_FLUSH_CPU_CACHE(); |
| 762 | |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 763 | /* This shouldn't return. If it returns, we have a problem */ |
Len Brown | 3f6f49c | 2012-07-26 20:08:54 -0400 | [diff] [blame] | 764 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
| 765 | /* Reprogram control registers */ |
| 766 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 767 | |
| 768 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
| 769 | } |
| 770 | |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 771 | static void acpi_hibernation_leave(void) |
| 772 | { |
Lukas Wunner | fbda4b3 | 2016-03-23 00:11:20 +0100 | [diff] [blame] | 773 | pm_set_resume_via_firmware(); |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 774 | /* |
| 775 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to |
| 776 | * enable it here. |
| 777 | */ |
| 778 | acpi_enable(); |
Len Brown | 3f6f49c | 2012-07-26 20:08:54 -0400 | [diff] [blame] | 779 | /* Reprogram control registers */ |
| 780 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 781 | /* Check the hardware signature */ |
Oliver Neukum | 5c551e6 | 2014-01-10 10:51:53 +0100 | [diff] [blame] | 782 | if (facs && s4_hardware_signature != facs->hardware_signature) |
| 783 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 784 | /* Restore the NVS memory area */ |
Matthew Garrett | dd4c4f1 | 2010-05-28 16:32:14 -0400 | [diff] [blame] | 785 | suspend_nvs_restore(); |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 786 | /* Allow EC transactions to happen. */ |
Lv Zheng | c2b46d6 | 2016-08-03 16:01:36 +0800 | [diff] [blame] | 787 | acpi_ec_unblock_transactions(); |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 788 | } |
| 789 | |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 790 | static void acpi_pm_thaw(void) |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 791 | { |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 792 | acpi_ec_unblock_transactions(); |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 793 | acpi_enable_all_runtime_gpes(); |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 794 | } |
| 795 | |
Lionel Debroux | 073ef1f | 2010-11-09 21:48:49 +0100 | [diff] [blame] | 796 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 797 | .begin = acpi_hibernation_begin, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 798 | .end = acpi_pm_end, |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 799 | .pre_snapshot = acpi_pm_prepare, |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 800 | .finish = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 801 | .prepare = acpi_pm_prepare, |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 802 | .enter = acpi_hibernation_enter, |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 803 | .leave = acpi_hibernation_leave, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 804 | .pre_restore = acpi_pm_freeze, |
| 805 | .restore_cleanup = acpi_pm_thaw, |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 806 | }; |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 807 | |
| 808 | /** |
| 809 | * acpi_hibernation_begin_old - Set the target system sleep state to |
| 810 | * ACPI_STATE_S4 and execute the _PTS control method. This |
| 811 | * function is used if the pre-ACPI 2.0 suspend ordering has been |
| 812 | * requested. |
| 813 | */ |
| 814 | static int acpi_hibernation_begin_old(void) |
| 815 | { |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 816 | int error; |
| 817 | /* |
| 818 | * The _TTS object should always be evaluated before the _PTS object. |
| 819 | * When the old_suspended_ordering is true, the _PTS object is |
| 820 | * evaluated in the acpi_sleep_prepare. |
| 821 | */ |
| 822 | acpi_sleep_tts_switch(ACPI_STATE_S4); |
| 823 | |
| 824 | error = acpi_sleep_prepare(ACPI_STATE_S4); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 825 | |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 826 | if (!error) { |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 827 | if (!nvs_nosave) |
Matthew Garrett | dd4c4f1 | 2010-05-28 16:32:14 -0400 | [diff] [blame] | 828 | error = suspend_nvs_alloc(); |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 829 | if (!error) { |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 830 | acpi_target_sleep_state = ACPI_STATE_S4; |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 831 | acpi_scan_lock_acquire(); |
| 832 | } |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 833 | } |
| 834 | return error; |
| 835 | } |
| 836 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 837 | /* |
| 838 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has |
| 839 | * been requested. |
| 840 | */ |
Lionel Debroux | 073ef1f | 2010-11-09 21:48:49 +0100 | [diff] [blame] | 841 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 842 | .begin = acpi_hibernation_begin_old, |
| 843 | .end = acpi_pm_end, |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 844 | .pre_snapshot = acpi_pm_pre_suspend, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 845 | .prepare = acpi_pm_freeze, |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 846 | .finish = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 847 | .enter = acpi_hibernation_enter, |
| 848 | .leave = acpi_hibernation_leave, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 849 | .pre_restore = acpi_pm_freeze, |
| 850 | .restore_cleanup = acpi_pm_thaw, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 851 | .recover = acpi_pm_finish, |
| 852 | }; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 853 | |
| 854 | static void acpi_sleep_hibernate_setup(void) |
| 855 | { |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 856 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 857 | return; |
| 858 | |
| 859 | hibernation_set_ops(old_suspend_ordering ? |
| 860 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); |
| 861 | sleep_states[ACPI_STATE_S4] = 1; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 862 | if (nosigcheck) |
| 863 | return; |
| 864 | |
| 865 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); |
| 866 | if (facs) |
| 867 | s4_hardware_signature = facs->hardware_signature; |
| 868 | } |
| 869 | #else /* !CONFIG_HIBERNATION */ |
| 870 | static inline void acpi_sleep_hibernate_setup(void) {} |
| 871 | #endif /* !CONFIG_HIBERNATION */ |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 872 | |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 873 | static void acpi_power_off_prepare(void) |
| 874 | { |
| 875 | /* Prepare to power off the system */ |
| 876 | acpi_sleep_prepare(ACPI_STATE_S5); |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 877 | acpi_disable_all_gpes(); |
Rafael J. Wysocki | c52fa70 | 2014-12-01 23:51:13 +0100 | [diff] [blame] | 878 | acpi_os_wait_events_complete(); |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 879 | } |
| 880 | |
| 881 | static void acpi_power_off(void) |
| 882 | { |
| 883 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ |
Frank Seidel | 4d93915 | 2009-02-04 17:03:07 +0100 | [diff] [blame] | 884 | printk(KERN_DEBUG "%s called\n", __func__); |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 885 | local_irq_disable(); |
Len Brown | 3f6f49c | 2012-07-26 20:08:54 -0400 | [diff] [blame] | 886 | acpi_enter_sleep_state(ACPI_STATE_S5); |
Len Brown | 96f15ef | 2009-04-17 23:32:20 -0400 | [diff] [blame] | 887 | } |
| 888 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 889 | int __init acpi_sleep_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | { |
Joe Perches | ed4cf5b | 2013-02-22 07:37:36 +0000 | [diff] [blame] | 891 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
| 892 | char *pos = supported; |
| 893 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 895 | acpi_sleep_dmi_check(); |
| 896 | |
Frans Pop | 5a50fe7 | 2007-09-20 22:27:44 +0200 | [diff] [blame] | 897 | sleep_states[ACPI_STATE_S0] = 1; |
Frans Pop | 5a50fe7 | 2007-09-20 22:27:44 +0200 | [diff] [blame] | 898 | |
Sudeep Holla | 504997c | 2016-02-17 12:03:23 +0000 | [diff] [blame] | 899 | acpi_sleep_syscore_init(); |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 900 | acpi_sleep_suspend_setup(); |
| 901 | acpi_sleep_hibernate_setup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 903 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 904 | sleep_states[ACPI_STATE_S5] = 1; |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 905 | pm_power_off_prepare = acpi_power_off_prepare; |
| 906 | pm_power_off = acpi_power_off; |
Chen Yu | 1373718 | 2016-03-22 08:51:10 +0800 | [diff] [blame] | 907 | } else { |
| 908 | acpi_no_s5 = true; |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 909 | } |
Joe Perches | ed4cf5b | 2013-02-22 07:37:36 +0000 | [diff] [blame] | 910 | |
| 911 | supported[0] = 0; |
| 912 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { |
| 913 | if (sleep_states[i]) |
| 914 | pos += sprintf(pos, " S%d", i); |
| 915 | } |
| 916 | pr_info(PREFIX "(supports%s)\n", supported); |
| 917 | |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 918 | /* |
Ocean He | 2c85025 | 2016-06-27 14:50:16 +0000 | [diff] [blame] | 919 | * Register the sleep_notifier to reboot notifier list so that the _TTS |
| 920 | * and _PTS object can also be evaluated when the system enters S5. |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 921 | */ |
Ocean He | 2c85025 | 2016-06-27 14:50:16 +0000 | [diff] [blame] | 922 | register_reboot_notifier(&sleep_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | return 0; |
| 924 | } |