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