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> |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 19 | |
| 20 | #include <asm/io.h> |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <acpi/acpi_bus.h> |
| 23 | #include <acpi/acpi_drivers.h> |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 24 | |
| 25 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "sleep.h" |
| 27 | |
| 28 | u8 sleep_states[ACPI_S_STATE_COUNT]; |
| 29 | |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 30 | static void acpi_sleep_tts_switch(u32 acpi_state) |
| 31 | { |
| 32 | union acpi_object in_arg = { ACPI_TYPE_INTEGER }; |
| 33 | struct acpi_object_list arg_list = { 1, &in_arg }; |
| 34 | acpi_status status = AE_OK; |
| 35 | |
| 36 | in_arg.integer.value = acpi_state; |
| 37 | status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); |
| 38 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 39 | /* |
| 40 | * OS can't evaluate the _TTS object correctly. Some warning |
| 41 | * message will be printed. But it won't break anything. |
| 42 | */ |
| 43 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | static int tts_notify_reboot(struct notifier_block *this, |
| 48 | unsigned long code, void *x) |
| 49 | { |
| 50 | acpi_sleep_tts_switch(ACPI_STATE_S5); |
| 51 | return NOTIFY_DONE; |
| 52 | } |
| 53 | |
| 54 | static struct notifier_block tts_notifier = { |
| 55 | .notifier_call = tts_notify_reboot, |
| 56 | .next = NULL, |
| 57 | .priority = 0, |
| 58 | }; |
| 59 | |
Rafael J. Wysocki | c9b6c8f | 2008-01-08 00:10:57 +0100 | [diff] [blame] | 60 | static int acpi_sleep_prepare(u32 acpi_state) |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 61 | { |
| 62 | #ifdef CONFIG_ACPI_SLEEP |
| 63 | /* do we have a wakeup address for S2 and S3? */ |
| 64 | if (acpi_state == ACPI_STATE_S3) { |
| 65 | if (!acpi_wakeup_address) { |
| 66 | return -EFAULT; |
| 67 | } |
H. Peter Anvin | 4b4f728 | 2008-06-24 23:03:48 +0200 | [diff] [blame] | 68 | acpi_set_firmware_waking_vector( |
| 69 | (acpi_physical_address)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 |
Len Brown | b849075 | 2008-10-23 00:45:18 -0400 | [diff] [blame] | 82 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
Zhang Rui | d7f0eea | 2009-12-30 15:36:42 +0800 | [diff] [blame] | 83 | |
| 84 | /* |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 85 | * The ACPI specification wants us to save NVS memory regions during hibernation |
| 86 | * and to restore them during the subsequent resume. Windows does that also for |
| 87 | * suspend to RAM. However, it is known that this mechanism does not work on |
| 88 | * all machines, so we allow the user to disable it with the help of the |
| 89 | * 'acpi_sleep=nonvs' kernel command line option. |
| 90 | */ |
| 91 | static bool nvs_nosave; |
| 92 | |
| 93 | void __init acpi_nvs_nosave(void) |
| 94 | { |
| 95 | nvs_nosave = true; |
| 96 | } |
| 97 | |
| 98 | /* |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 99 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the |
| 100 | * user to request that behavior by using the 'acpi_old_suspend_ordering' |
| 101 | * kernel command line option that causes the following variable to be set. |
| 102 | */ |
| 103 | static bool old_suspend_ordering; |
| 104 | |
| 105 | void __init acpi_old_suspend_ordering(void) |
| 106 | { |
| 107 | old_suspend_ordering = true; |
| 108 | } |
| 109 | |
| 110 | /** |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 111 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 112 | */ |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 113 | static int acpi_pm_freeze(void) |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 114 | { |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 115 | acpi_disable_all_gpes(); |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 116 | acpi_os_wait_events_complete(NULL); |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 117 | acpi_ec_block_transactions(); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | /** |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 122 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. |
| 123 | */ |
| 124 | static int acpi_pm_pre_suspend(void) |
| 125 | { |
| 126 | acpi_pm_freeze(); |
| 127 | suspend_nvs_save(); |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | /** |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 132 | * __acpi_pm_prepare - Prepare the platform to enter the target state. |
| 133 | * |
| 134 | * If necessary, set the firmware waking vector and do arch-specific |
| 135 | * nastiness to get the wakeup code to the waking vector. |
| 136 | */ |
| 137 | static int __acpi_pm_prepare(void) |
| 138 | { |
| 139 | int error = acpi_sleep_prepare(acpi_target_sleep_state); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 140 | if (error) |
| 141 | acpi_target_sleep_state = ACPI_STATE_S0; |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 142 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 143 | return error; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * acpi_pm_prepare - Prepare the platform to enter the target sleep |
| 148 | * state and disable the GPEs. |
| 149 | */ |
| 150 | static int acpi_pm_prepare(void) |
| 151 | { |
| 152 | int error = __acpi_pm_prepare(); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 153 | if (!error) |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 154 | acpi_pm_pre_suspend(); |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 155 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 156 | return error; |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * acpi_pm_finish - Instruct the platform to leave a sleep state. |
| 161 | * |
| 162 | * This is called after we wake back up (or if entering the sleep state |
| 163 | * failed). |
| 164 | */ |
| 165 | static void acpi_pm_finish(void) |
| 166 | { |
| 167 | u32 acpi_state = acpi_target_sleep_state; |
| 168 | |
Len Brown | 42de553 | 2010-06-12 01:15:40 -0400 | [diff] [blame] | 169 | acpi_ec_unblock_transactions(); |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 170 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 171 | if (acpi_state == ACPI_STATE_S0) |
| 172 | return; |
| 173 | |
| 174 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
| 175 | acpi_state); |
Rafael J. Wysocki | 78f5f02 | 2010-07-06 22:09:38 -0400 | [diff] [blame] | 176 | acpi_disable_wakeup_devices(acpi_state); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 177 | acpi_leave_sleep_state(acpi_state); |
| 178 | |
| 179 | /* reset firmware waking vector */ |
| 180 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); |
| 181 | |
| 182 | acpi_target_sleep_state = ACPI_STATE_S0; |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * acpi_pm_end - Finish up suspend sequence. |
| 187 | */ |
| 188 | static void acpi_pm_end(void) |
| 189 | { |
Rafael J. Wysocki | e96c4b0 | 2010-07-06 18:28:35 -0400 | [diff] [blame] | 190 | suspend_nvs_free(); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 191 | /* |
| 192 | * This is necessary in case acpi_pm_finish() is not called during a |
| 193 | * failing transition to a sleep state. |
| 194 | */ |
| 195 | acpi_target_sleep_state = ACPI_STATE_S0; |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 196 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 197 | } |
Rafael J. Wysocki | 92daa7b | 2008-10-23 21:46:43 +0200 | [diff] [blame] | 198 | #else /* !CONFIG_ACPI_SLEEP */ |
| 199 | #define acpi_target_sleep_state ACPI_STATE_S0 |
Rafael J. Wysocki | 5d1e072 | 2008-10-22 14:58:43 -0400 | [diff] [blame] | 200 | #endif /* CONFIG_ACPI_SLEEP */ |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 201 | |
| 202 | #ifdef CONFIG_SUSPEND |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | extern void do_suspend_lowlevel(void); |
| 204 | |
| 205 | static u32 acpi_suspend_states[] = { |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 206 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
| 207 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, |
| 208 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 209 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | }; |
| 211 | |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 212 | /** |
Len Brown | 2c6e33c | 2008-04-23 18:02:52 -0400 | [diff] [blame] | 213 | * acpi_suspend_begin - Set the target system sleep state to the state |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 214 | * associated with given @pm_state, if supported. |
| 215 | */ |
Len Brown | 2c6e33c | 2008-04-23 18:02:52 -0400 | [diff] [blame] | 216 | static int acpi_suspend_begin(suspend_state_t pm_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | { |
| 218 | u32 acpi_state = acpi_suspend_states[pm_state]; |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 219 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 221 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 222 | if (error) |
| 223 | return error; |
| 224 | |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 225 | if (sleep_states[acpi_state]) { |
| 226 | acpi_target_sleep_state = acpi_state; |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 227 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 228 | } else { |
| 229 | printk(KERN_ERR "ACPI does not support this state: %d\n", |
| 230 | pm_state); |
| 231 | error = -ENOSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 233 | return error; |
| 234 | } |
| 235 | |
| 236 | /** |
Len Brown | 2c6e33c | 2008-04-23 18:02:52 -0400 | [diff] [blame] | 237 | * acpi_suspend_enter - Actually enter a sleep state. |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 238 | * @pm_state: ignored |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | * |
Rafael J. Wysocki | 50ad147 | 2007-07-24 11:58:39 +0200 | [diff] [blame] | 240 | * Flush caches and go to sleep. For STR we have to call arch-specific |
| 241 | * assembly, which in turn call acpi_enter_sleep_state(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
| 243 | */ |
Len Brown | 2c6e33c | 2008-04-23 18:02:52 -0400 | [diff] [blame] | 244 | static int acpi_suspend_enter(suspend_state_t pm_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | { |
| 246 | acpi_status status = AE_OK; |
| 247 | unsigned long flags = 0; |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 248 | u32 acpi_state = acpi_target_sleep_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
| 250 | ACPI_FLUSH_CPU_CACHE(); |
| 251 | |
| 252 | /* Do arch specific saving of state. */ |
Rafael J. Wysocki | 50ad147 | 2007-07-24 11:58:39 +0200 | [diff] [blame] | 253 | if (acpi_state == ACPI_STATE_S3) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | int error = acpi_save_state_mem(); |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 255 | |
Rafael J. Wysocki | 60417f5 | 2008-01-08 00:07:39 +0100 | [diff] [blame] | 256 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | return error; |
| 258 | } |
| 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | local_irq_save(flags); |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 261 | switch (acpi_state) { |
| 262 | case ACPI_STATE_S1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | barrier(); |
| 264 | status = acpi_enter_sleep_state(acpi_state); |
| 265 | break; |
| 266 | |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 267 | case ACPI_STATE_S3: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | do_suspend_lowlevel(); |
| 269 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
Arnaud Patard | 872d83d | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 271 | |
Matthew Garrett | b6dacf6 | 2010-05-11 13:49:25 -0400 | [diff] [blame] | 272 | /* This violates the spec but is required for bug compatibility. */ |
| 273 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); |
Rafael J. Wysocki | 65df784 | 2008-11-26 17:53:13 -0500 | [diff] [blame] | 274 | |
Rafael J. Wysocki | c95d47a | 2008-01-08 00:05:21 +0100 | [diff] [blame] | 275 | /* Reprogram control registers and execute _BFS */ |
| 276 | acpi_leave_sleep_state_prep(acpi_state); |
| 277 | |
Pavel Machek | 23b168d | 2008-02-05 19:27:12 +0100 | [diff] [blame] | 278 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
Arnaud Patard | 872d83d | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 279 | * of the OSPM to clear the status bit [ implying that the |
| 280 | * POWER_BUTTON event should not reach userspace ] |
| 281 | */ |
| 282 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) |
| 283 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
| 284 | |
Shaohua Li | a3627f6 | 2007-06-20 09:17:58 +0800 | [diff] [blame] | 285 | /* |
| 286 | * Disable and clear GPE status before interrupt is enabled. Some GPEs |
| 287 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. |
| 288 | * acpi_leave_sleep_state will reenable specific GPEs later |
| 289 | */ |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 290 | acpi_disable_all_gpes(); |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 291 | /* Allow EC transactions to happen. */ |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 292 | acpi_ec_unblock_transactions_early(); |
Shaohua Li | a3627f6 | 2007-06-20 09:17:58 +0800 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | local_irq_restore(flags); |
| 295 | printk(KERN_DEBUG "Back to C!\n"); |
| 296 | |
Rafael J. Wysocki | e9b3aba | 2007-07-17 22:40:06 +0200 | [diff] [blame] | 297 | /* restore processor state */ |
Rafael J. Wysocki | 50ad147 | 2007-07-24 11:58:39 +0200 | [diff] [blame] | 298 | if (acpi_state == ACPI_STATE_S3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | acpi_restore_state_mem(); |
| 300 | |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 301 | suspend_nvs_restore(); |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
| 304 | } |
| 305 | |
Len Brown | 2c6e33c | 2008-04-23 18:02:52 -0400 | [diff] [blame] | 306 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
Shaohua Li | eb9289e | 2005-10-30 15:00:01 -0800 | [diff] [blame] | 307 | { |
Johannes Berg | e8c9c50 | 2007-04-30 15:09:54 -0700 | [diff] [blame] | 308 | u32 acpi_state; |
Shaohua Li | eb9289e | 2005-10-30 15:00:01 -0800 | [diff] [blame] | 309 | |
Johannes Berg | e8c9c50 | 2007-04-30 15:09:54 -0700 | [diff] [blame] | 310 | switch (pm_state) { |
| 311 | case PM_SUSPEND_ON: |
| 312 | case PM_SUSPEND_STANDBY: |
| 313 | case PM_SUSPEND_MEM: |
| 314 | acpi_state = acpi_suspend_states[pm_state]; |
| 315 | |
| 316 | return sleep_states[acpi_state]; |
| 317 | default: |
| 318 | return 0; |
| 319 | } |
Shaohua Li | eb9289e | 2005-10-30 15:00:01 -0800 | [diff] [blame] | 320 | } |
| 321 | |
Len Brown | 2c6e33c | 2008-04-23 18:02:52 -0400 | [diff] [blame] | 322 | static struct platform_suspend_ops acpi_suspend_ops = { |
| 323 | .valid = acpi_suspend_state_valid, |
| 324 | .begin = acpi_suspend_begin, |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 325 | .prepare_late = acpi_pm_prepare, |
Len Brown | 2c6e33c | 2008-04-23 18:02:52 -0400 | [diff] [blame] | 326 | .enter = acpi_suspend_enter, |
Rafael J. Wysocki | 618d7fd | 2010-07-02 00:14:57 +0200 | [diff] [blame] | 327 | .wake = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 328 | .end = acpi_pm_end, |
| 329 | }; |
| 330 | |
| 331 | /** |
| 332 | * acpi_suspend_begin_old - Set the target system sleep state to the |
| 333 | * state associated with given @pm_state, if supported, and |
| 334 | * execute the _PTS control method. This function is used if the |
| 335 | * pre-ACPI 2.0 suspend ordering has been requested. |
| 336 | */ |
| 337 | static int acpi_suspend_begin_old(suspend_state_t pm_state) |
| 338 | { |
| 339 | int error = acpi_suspend_begin(pm_state); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 340 | if (!error) |
| 341 | error = __acpi_pm_prepare(); |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 342 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 343 | return error; |
| 344 | } |
| 345 | |
| 346 | /* |
| 347 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has |
| 348 | * been requested. |
| 349 | */ |
| 350 | static struct platform_suspend_ops acpi_suspend_ops_old = { |
| 351 | .valid = acpi_suspend_state_valid, |
| 352 | .begin = acpi_suspend_begin_old, |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 353 | .prepare_late = acpi_pm_pre_suspend, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 354 | .enter = acpi_suspend_enter, |
Rafael J. Wysocki | 618d7fd | 2010-07-02 00:14:57 +0200 | [diff] [blame] | 355 | .wake = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 356 | .end = acpi_pm_end, |
| 357 | .recover = acpi_pm_finish, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | }; |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 359 | |
| 360 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
| 361 | { |
| 362 | old_suspend_ordering = true; |
| 363 | return 0; |
| 364 | } |
| 365 | |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 366 | static int __init init_nvs_nosave(const struct dmi_system_id *d) |
| 367 | { |
| 368 | acpi_nvs_nosave(); |
| 369 | return 0; |
| 370 | } |
| 371 | |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 372 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { |
| 373 | { |
| 374 | .callback = init_old_suspend_ordering, |
| 375 | .ident = "Abit KN9 (nForce4 variant)", |
| 376 | .matches = { |
| 377 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), |
| 378 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), |
| 379 | }, |
| 380 | }, |
Rafael J. Wysocki | 4fb507b | 2008-10-14 22:54:06 +0200 | [diff] [blame] | 381 | { |
| 382 | .callback = init_old_suspend_ordering, |
| 383 | .ident = "HP xw4600 Workstation", |
| 384 | .matches = { |
| 385 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 386 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), |
| 387 | }, |
| 388 | }, |
Rafael J. Wysocki | 65df784 | 2008-11-26 17:53:13 -0500 | [diff] [blame] | 389 | { |
Andy Whitcroft | a140449 | 2009-02-11 18:11:22 +0000 | [diff] [blame] | 390 | .callback = init_old_suspend_ordering, |
| 391 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", |
| 392 | .matches = { |
| 393 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), |
| 394 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), |
| 395 | }, |
| 396 | }, |
Zhang Rui | 45e7798 | 2009-03-15 22:13:44 -0400 | [diff] [blame] | 397 | { |
Zhao Yakui | 2a9ef8e | 2009-03-18 16:36:25 +0800 | [diff] [blame] | 398 | .callback = init_old_suspend_ordering, |
| 399 | .ident = "Panasonic CF51-2L", |
| 400 | .matches = { |
| 401 | DMI_MATCH(DMI_BOARD_VENDOR, |
| 402 | "Matsushita Electric Industrial Co.,Ltd."), |
| 403 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), |
| 404 | }, |
| 405 | }, |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 406 | { |
| 407 | .callback = init_nvs_nosave, |
| 408 | .ident = "Sony Vaio VGN-SR11M", |
| 409 | .matches = { |
| 410 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 411 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), |
| 412 | }, |
| 413 | }, |
| 414 | { |
| 415 | .callback = init_nvs_nosave, |
| 416 | .ident = "Everex StepNote Series", |
| 417 | .matches = { |
| 418 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), |
| 419 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), |
| 420 | }, |
| 421 | }, |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 422 | {}, |
| 423 | }; |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 424 | #endif /* CONFIG_SUSPEND */ |
| 425 | |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 426 | #ifdef CONFIG_HIBERNATION |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 427 | static unsigned long s4_hardware_signature; |
| 428 | static struct acpi_table_facs *facs; |
| 429 | static bool nosigcheck; |
| 430 | |
| 431 | void __init acpi_no_s4_hw_signature(void) |
| 432 | { |
| 433 | nosigcheck = true; |
| 434 | } |
| 435 | |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 436 | static int acpi_hibernation_begin(void) |
Rafael J. Wysocki | 74f270a | 2007-10-18 03:04:42 -0700 | [diff] [blame] | 437 | { |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 438 | int error; |
| 439 | |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 440 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 441 | if (!error) { |
| 442 | acpi_target_sleep_state = ACPI_STATE_S4; |
| 443 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
| 444 | } |
| 445 | |
| 446 | return error; |
| 447 | } |
| 448 | |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 449 | static int acpi_hibernation_enter(void) |
| 450 | { |
| 451 | acpi_status status = AE_OK; |
| 452 | unsigned long flags = 0; |
| 453 | |
| 454 | ACPI_FLUSH_CPU_CACHE(); |
| 455 | |
| 456 | local_irq_save(flags); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 457 | /* This shouldn't return. If it returns, we have a problem */ |
| 458 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
Rafael J. Wysocki | c95d47a | 2008-01-08 00:05:21 +0100 | [diff] [blame] | 459 | /* Reprogram control registers and execute _BFS */ |
| 460 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 461 | local_irq_restore(flags); |
| 462 | |
| 463 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
| 464 | } |
| 465 | |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 466 | static void acpi_hibernation_leave(void) |
| 467 | { |
| 468 | /* |
| 469 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to |
| 470 | * enable it here. |
| 471 | */ |
| 472 | acpi_enable(); |
Rafael J. Wysocki | c95d47a | 2008-01-08 00:05:21 +0100 | [diff] [blame] | 473 | /* Reprogram control registers and execute _BFS */ |
| 474 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 475 | /* Check the hardware signature */ |
| 476 | if (facs && s4_hardware_signature != facs->hardware_signature) { |
| 477 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " |
| 478 | "cannot resume!\n"); |
| 479 | panic("ACPI S4 hardware signature mismatch"); |
| 480 | } |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 481 | /* Restore the NVS memory area */ |
Matthew Garrett | dd4c4f1 | 2010-05-28 16:32:14 -0400 | [diff] [blame] | 482 | suspend_nvs_restore(); |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 483 | /* Allow EC transactions to happen. */ |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 484 | acpi_ec_unblock_transactions_early(); |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 485 | } |
| 486 | |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 487 | static void acpi_pm_thaw(void) |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 488 | { |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 489 | acpi_ec_unblock_transactions(); |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 490 | acpi_enable_all_runtime_gpes(); |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 491 | } |
| 492 | |
Rafael J. Wysocki | b3dac3b | 2007-10-18 03:04:43 -0700 | [diff] [blame] | 493 | static struct platform_hibernation_ops acpi_hibernation_ops = { |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 494 | .begin = acpi_hibernation_begin, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 495 | .end = acpi_pm_end, |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 496 | .pre_snapshot = acpi_pm_prepare, |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 497 | .finish = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 498 | .prepare = acpi_pm_prepare, |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 499 | .enter = acpi_hibernation_enter, |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 500 | .leave = acpi_hibernation_leave, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 501 | .pre_restore = acpi_pm_freeze, |
| 502 | .restore_cleanup = acpi_pm_thaw, |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 503 | }; |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 504 | |
| 505 | /** |
| 506 | * acpi_hibernation_begin_old - Set the target system sleep state to |
| 507 | * ACPI_STATE_S4 and execute the _PTS control method. This |
| 508 | * function is used if the pre-ACPI 2.0 suspend ordering has been |
| 509 | * requested. |
| 510 | */ |
| 511 | static int acpi_hibernation_begin_old(void) |
| 512 | { |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 513 | int error; |
| 514 | /* |
| 515 | * The _TTS object should always be evaluated before the _PTS object. |
| 516 | * When the old_suspended_ordering is true, the _PTS object is |
| 517 | * evaluated in the acpi_sleep_prepare. |
| 518 | */ |
| 519 | acpi_sleep_tts_switch(ACPI_STATE_S4); |
| 520 | |
| 521 | error = acpi_sleep_prepare(ACPI_STATE_S4); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 522 | |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 523 | if (!error) { |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 524 | if (!nvs_nosave) |
Matthew Garrett | dd4c4f1 | 2010-05-28 16:32:14 -0400 | [diff] [blame] | 525 | error = suspend_nvs_alloc(); |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 526 | if (!error) |
| 527 | acpi_target_sleep_state = ACPI_STATE_S4; |
| 528 | } |
| 529 | return error; |
| 530 | } |
| 531 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 532 | /* |
| 533 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has |
| 534 | * been requested. |
| 535 | */ |
| 536 | static struct platform_hibernation_ops acpi_hibernation_ops_old = { |
| 537 | .begin = acpi_hibernation_begin_old, |
| 538 | .end = acpi_pm_end, |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 539 | .pre_snapshot = acpi_pm_pre_suspend, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 540 | .prepare = acpi_pm_freeze, |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 541 | .finish = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 542 | .enter = acpi_hibernation_enter, |
| 543 | .leave = acpi_hibernation_leave, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 544 | .pre_restore = acpi_pm_freeze, |
| 545 | .restore_cleanup = acpi_pm_thaw, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 546 | .recover = acpi_pm_finish, |
| 547 | }; |
| 548 | #endif /* CONFIG_HIBERNATION */ |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 549 | |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 550 | int acpi_suspend(u32 acpi_state) |
| 551 | { |
| 552 | suspend_state_t states[] = { |
| 553 | [1] = PM_SUSPEND_STANDBY, |
| 554 | [3] = PM_SUSPEND_MEM, |
| 555 | [5] = PM_SUSPEND_MAX |
| 556 | }; |
| 557 | |
| 558 | if (acpi_state < 6 && states[acpi_state]) |
| 559 | return pm_suspend(states[acpi_state]); |
| 560 | if (acpi_state == 4) |
| 561 | return hibernate(); |
| 562 | return -EINVAL; |
| 563 | } |
| 564 | |
Alexey Starikovskiy | 853298b | 2007-09-25 18:45:15 +0400 | [diff] [blame] | 565 | #ifdef CONFIG_PM_SLEEP |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 566 | /** |
| 567 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device |
| 568 | * in the system sleep state given by %acpi_target_sleep_state |
David Brownell | 2fe2de5 | 2008-06-05 01:15:40 +0200 | [diff] [blame] | 569 | * @dev: device to examine; its driver model wakeup flags control |
| 570 | * whether it should be able to wake up the system |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 571 | * @d_min_p: used to store the upper limit of allowed states range |
| 572 | * Return value: preferred power state of the device on success, -ENODEV on |
| 573 | * failure (ie. if there's no 'struct acpi_device' for @dev) |
| 574 | * |
| 575 | * Find the lowest power (highest number) ACPI device power state that |
| 576 | * device @dev can be in while the system is in the sleep state represented |
| 577 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be |
| 578 | * able to wake up the system from this sleep state. If @d_min_p is set, |
| 579 | * the highest power (lowest number) device power state of @dev allowed |
| 580 | * in this system sleep state is stored at the location pointed to by it. |
| 581 | * |
| 582 | * The caller must ensure that @dev is valid before using this function. |
| 583 | * The caller is also responsible for figuring out if the device is |
| 584 | * supposed to be able to wake up the system and passing this information |
| 585 | * via @wake. |
| 586 | */ |
| 587 | |
David Brownell | 2fe2de5 | 2008-06-05 01:15:40 +0200 | [diff] [blame] | 588 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 589 | { |
| 590 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); |
| 591 | struct acpi_device *adev; |
| 592 | char acpi_method[] = "_SxD"; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 593 | unsigned long long d_min, d_max; |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 594 | |
| 595 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { |
Shaohua Li | ead7759 | 2007-08-23 15:01:13 +0800 | [diff] [blame] | 596 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 597 | return -ENODEV; |
| 598 | } |
| 599 | |
| 600 | acpi_method[2] = '0' + acpi_target_sleep_state; |
| 601 | /* |
| 602 | * If the sleep state is S0, we will return D3, but if the device has |
| 603 | * _S0W, we will use the value from _S0W |
| 604 | */ |
| 605 | d_min = ACPI_STATE_D0; |
| 606 | d_max = ACPI_STATE_D3; |
| 607 | |
| 608 | /* |
| 609 | * If present, _SxD methods return the minimum D-state (highest power |
| 610 | * state) we can use for the corresponding S-states. Otherwise, the |
| 611 | * minimum D-state is D0 (ACPI 3.x). |
| 612 | * |
| 613 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer |
| 614 | * provided -- that's our fault recovery, we ignore retval. |
| 615 | */ |
| 616 | if (acpi_target_sleep_state > ACPI_STATE_S0) |
| 617 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); |
| 618 | |
| 619 | /* |
| 620 | * If _PRW says we can wake up the system from the target sleep state, |
| 621 | * the D-state returned by _SxD is sufficient for that (we assume a |
| 622 | * wakeup-aware driver if wake is set). Still, if _SxW exists |
| 623 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that |
| 624 | * can wake the system. _S0W may be valid, too. |
| 625 | */ |
| 626 | if (acpi_target_sleep_state == ACPI_STATE_S0 || |
David Brownell | 2fe2de5 | 2008-06-05 01:15:40 +0200 | [diff] [blame] | 627 | (device_may_wakeup(dev) && adev->wakeup.state.enabled && |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 628 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
Rafael J. Wysocki | ad3399c | 2008-01-11 00:10:38 +0100 | [diff] [blame] | 629 | acpi_status status; |
| 630 | |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 631 | acpi_method[3] = 'W'; |
Rafael J. Wysocki | ad3399c | 2008-01-11 00:10:38 +0100 | [diff] [blame] | 632 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
| 633 | &d_max); |
| 634 | if (ACPI_FAILURE(status)) { |
| 635 | d_max = d_min; |
| 636 | } else if (d_max < d_min) { |
| 637 | /* Warn the user of the broken DSDT */ |
| 638 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", |
| 639 | acpi_method); |
| 640 | /* Sanitize it */ |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 641 | d_min = d_max; |
Rafael J. Wysocki | ad3399c | 2008-01-11 00:10:38 +0100 | [diff] [blame] | 642 | } |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | if (d_min_p) |
| 646 | *d_min_p = d_min; |
| 647 | return d_max; |
| 648 | } |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 649 | |
| 650 | /** |
| 651 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up |
| 652 | * capability of given device |
| 653 | * @dev: device to handle |
| 654 | * @enable: 'true' - enable, 'false' - disable the wake-up capability |
| 655 | */ |
| 656 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) |
| 657 | { |
| 658 | acpi_handle handle; |
| 659 | struct acpi_device *adev; |
Rafael J. Wysocki | df8db91 | 2009-09-08 23:13:49 +0200 | [diff] [blame] | 660 | int error; |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 661 | |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 662 | if (!device_can_wakeup(dev)) |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 663 | return -EINVAL; |
| 664 | |
| 665 | handle = DEVICE_ACPI_HANDLE(dev); |
| 666 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { |
Rafael J. Wysocki | df8db91 | 2009-09-08 23:13:49 +0200 | [diff] [blame] | 667 | dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 668 | return -ENODEV; |
| 669 | } |
| 670 | |
Rafael J. Wysocki | e8b6f97 | 2010-06-25 01:18:39 +0200 | [diff] [blame] | 671 | error = enable ? |
| 672 | acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : |
| 673 | acpi_disable_wakeup_device_power(adev); |
Rafael J. Wysocki | df8db91 | 2009-09-08 23:13:49 +0200 | [diff] [blame] | 674 | if (!error) |
| 675 | dev_info(dev, "wake-up capability %s by ACPI\n", |
| 676 | enable ? "enabled" : "disabled"); |
| 677 | |
| 678 | return error; |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 679 | } |
Alexey Starikovskiy | 853298b | 2007-09-25 18:45:15 +0400 | [diff] [blame] | 680 | #endif |
Shaohua Li | fd4aff1 | 2007-07-17 22:40:25 +0200 | [diff] [blame] | 681 | |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 682 | static void acpi_power_off_prepare(void) |
| 683 | { |
| 684 | /* Prepare to power off the system */ |
| 685 | acpi_sleep_prepare(ACPI_STATE_S5); |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 686 | acpi_disable_all_gpes(); |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 687 | } |
| 688 | |
| 689 | static void acpi_power_off(void) |
| 690 | { |
| 691 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ |
Frank Seidel | 4d93915 | 2009-02-04 17:03:07 +0100 | [diff] [blame] | 692 | printk(KERN_DEBUG "%s called\n", __func__); |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 693 | local_irq_disable(); |
| 694 | acpi_enter_sleep_state(ACPI_STATE_S5); |
| 695 | } |
| 696 | |
Len Brown | 96f15ef | 2009-04-17 23:32:20 -0400 | [diff] [blame] | 697 | /* |
| 698 | * ACPI 2.0 created the optional _GTS and _BFS, |
| 699 | * but industry adoption has been neither rapid nor broad. |
| 700 | * |
| 701 | * Linux gets into trouble when it executes poorly validated |
| 702 | * paths through the BIOS, so disable _GTS and _BFS by default, |
| 703 | * but do speak up and offer the option to enable them. |
| 704 | */ |
| 705 | void __init acpi_gts_bfs_check(void) |
| 706 | { |
| 707 | acpi_handle dummy; |
| 708 | |
| 709 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy))) |
| 710 | { |
| 711 | printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); |
| 712 | printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " |
| 713 | "please notify linux-acpi@vger.kernel.org\n"); |
| 714 | } |
| 715 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy))) |
| 716 | { |
| 717 | printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); |
| 718 | printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " |
| 719 | "please notify linux-acpi@vger.kernel.org\n"); |
| 720 | } |
| 721 | } |
| 722 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 723 | int __init acpi_sleep_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | { |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 725 | acpi_status status; |
| 726 | u8 type_a, type_b; |
| 727 | #ifdef CONFIG_SUSPEND |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 728 | int i = 0; |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 729 | |
| 730 | dmi_check_system(acpisleep_dmi_table); |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 731 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
| 733 | if (acpi_disabled) |
| 734 | return 0; |
| 735 | |
Frans Pop | 5a50fe7 | 2007-09-20 22:27:44 +0200 | [diff] [blame] | 736 | sleep_states[ACPI_STATE_S0] = 1; |
| 737 | printk(KERN_INFO PREFIX "(supports S0"); |
| 738 | |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 739 | #ifdef CONFIG_SUSPEND |
Frans Pop | 5a50fe7 | 2007-09-20 22:27:44 +0200 | [diff] [blame] | 740 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
| 742 | if (ACPI_SUCCESS(status)) { |
| 743 | sleep_states[i] = 1; |
| 744 | printk(" S%d", i); |
| 745 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 748 | suspend_set_ops(old_suspend_ordering ? |
| 749 | &acpi_suspend_ops_old : &acpi_suspend_ops); |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 750 | #endif |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 751 | |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 752 | #ifdef CONFIG_HIBERNATION |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 753 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
| 754 | if (ACPI_SUCCESS(status)) { |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 755 | hibernation_set_ops(old_suspend_ordering ? |
| 756 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 757 | sleep_states[ACPI_STATE_S4] = 1; |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 758 | printk(" S4"); |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 759 | if (!nosigcheck) { |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 760 | acpi_get_table(ACPI_SIG_FACS, 1, |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 761 | (struct acpi_table_header **)&facs); |
| 762 | if (facs) |
| 763 | s4_hardware_signature = |
| 764 | facs->hardware_signature; |
| 765 | } |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 766 | } |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 767 | #endif |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 768 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
| 769 | if (ACPI_SUCCESS(status)) { |
| 770 | sleep_states[ACPI_STATE_S5] = 1; |
| 771 | printk(" S5"); |
| 772 | pm_power_off_prepare = acpi_power_off_prepare; |
| 773 | pm_power_off = acpi_power_off; |
| 774 | } |
| 775 | printk(")\n"); |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 776 | /* |
| 777 | * Register the tts_notifier to reboot notifier list so that the _TTS |
| 778 | * object can also be evaluated when the system enters S5. |
| 779 | */ |
| 780 | register_reboot_notifier(&tts_notifier); |
Len Brown | 96f15ef | 2009-04-17 23:32:20 -0400 | [diff] [blame] | 781 | acpi_gts_bfs_check(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | return 0; |
| 783 | } |