Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * poweroff.c - ACPI handler for powering off the system. |
| 3 | * |
| 4 | * AKA S5, but it is independent of whether or not the kernel supports |
| 5 | * any other sleep support in the system. |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 6 | * |
| 7 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
| 8 | * |
| 9 | * This file is released under the GPLv2. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #include <linux/pm.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <acpi/acpi_bus.h> |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 15 | #include <linux/sysdev.h> |
| 16 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include "sleep.h" |
| 18 | |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 19 | int acpi_sleep_prepare(u32 acpi_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | { |
Len Brown | 673d5b4 | 2007-07-28 03:33:16 -0400 | [diff] [blame] | 21 | #ifdef CONFIG_ACPI_SLEEP |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 22 | /* do we have a wakeup address for S2 and S3? */ |
Pavel Machek | b01d868 | 2005-09-10 00:27:19 -0700 | [diff] [blame] | 23 | if (acpi_state == ACPI_STATE_S3) { |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 24 | if (!acpi_wakeup_address) { |
| 25 | return -EFAULT; |
| 26 | } |
| 27 | acpi_set_firmware_waking_vector((acpi_physical_address) |
| 28 | virt_to_phys((void *) |
| 29 | acpi_wakeup_address)); |
| 30 | |
| 31 | } |
| 32 | ACPI_FLUSH_CPU_CACHE(); |
| 33 | acpi_enable_wakeup_device_prep(acpi_state); |
Len Brown | 673d5b4 | 2007-07-28 03:33:16 -0400 | [diff] [blame] | 34 | #endif |
Alexey Starikovskiy | 729b4d4 | 2005-12-01 04:29:00 -0500 | [diff] [blame] | 35 | acpi_gpe_sleep_prepare(acpi_state); |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 36 | acpi_enter_sleep_state_prep(acpi_state); |
| 37 | return 0; |
| 38 | } |
| 39 | |
Eric W. Biederman | b35c67a | 2005-07-26 12:17:52 -0600 | [diff] [blame] | 40 | #ifdef CONFIG_PM |
| 41 | |
Rafael J. Wysocki | bd804eb | 2007-07-19 01:47:40 -0700 | [diff] [blame] | 42 | static void acpi_power_off_prepare(void) |
| 43 | { |
| 44 | /* Prepare to power off the system */ |
| 45 | acpi_sleep_prepare(ACPI_STATE_S5); |
| 46 | } |
| 47 | |
| 48 | static void acpi_power_off(void) |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 49 | { |
Eric W. Biederman | b35c67a | 2005-07-26 12:17:52 -0600 | [diff] [blame] | 50 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 51 | printk("%s called\n", __FUNCTION__); |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 52 | local_irq_disable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /* Some SMP machines only can poweroff in boot CPU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | acpi_enter_sleep_state(ACPI_STATE_S5); |
| 55 | } |
| 56 | |
| 57 | static int acpi_poweroff_init(void) |
| 58 | { |
| 59 | if (!acpi_disabled) { |
| 60 | u8 type_a, type_b; |
| 61 | acpi_status status; |
| 62 | |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 63 | status = |
| 64 | acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
| 65 | if (ACPI_SUCCESS(status)) { |
Rafael J. Wysocki | bd804eb | 2007-07-19 01:47:40 -0700 | [diff] [blame] | 66 | pm_power_off_prepare = acpi_power_off_prepare; |
| 67 | pm_power_off = acpi_power_off; |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 68 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | late_initcall(acpi_poweroff_init); |
Eric W. Biederman | b35c67a | 2005-07-26 12:17:52 -0600 | [diff] [blame] | 74 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 75 | #endif /* CONFIG_PM */ |