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> |
| 15 | #include <linux/sched.h> |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 16 | #include <linux/sysdev.h> |
| 17 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "sleep.h" |
| 19 | |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 20 | int acpi_sleep_prepare(u32 acpi_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | { |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 22 | #ifdef CONFIG_ACPI_SLEEP |
| 23 | /* do we have a wakeup address for S2 and S3? */ |
| 24 | /* Here, we support only S4BIOS, those we set the wakeup address */ |
| 25 | /* S4OS is only supported for now via swsusp.. */ |
| 26 | if (acpi_state == ACPI_STATE_S3 || acpi_state == ACPI_STATE_S4) { |
| 27 | if (!acpi_wakeup_address) { |
| 28 | return -EFAULT; |
| 29 | } |
| 30 | acpi_set_firmware_waking_vector((acpi_physical_address) |
| 31 | virt_to_phys((void *) |
| 32 | acpi_wakeup_address)); |
| 33 | |
| 34 | } |
| 35 | ACPI_FLUSH_CPU_CACHE(); |
| 36 | acpi_enable_wakeup_device_prep(acpi_state); |
| 37 | #endif |
| 38 | if (acpi_state == ACPI_STATE_S5) { |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 39 | acpi_wakeup_gpe_poweroff_prepare(); |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 40 | } |
| 41 | acpi_enter_sleep_state_prep(acpi_state); |
| 42 | return 0; |
| 43 | } |
| 44 | |
Eric W. Biederman | b35c67a | 2005-07-26 12:17:52 -0600 | [diff] [blame] | 45 | #ifdef CONFIG_PM |
| 46 | |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 47 | void acpi_power_off(void) |
| 48 | { |
Eric W. Biederman | b35c67a | 2005-07-26 12:17:52 -0600 | [diff] [blame] | 49 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 50 | printk("%s called\n", __FUNCTION__); |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 51 | local_irq_disable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | /* Some SMP machines only can poweroff in boot CPU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | acpi_enter_sleep_state(ACPI_STATE_S5); |
| 54 | } |
| 55 | |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 56 | static int acpi_shutdown(struct sys_device *x) |
| 57 | { |
| 58 | return acpi_sleep_prepare(ACPI_STATE_S5); |
| 59 | } |
| 60 | |
| 61 | static struct sysdev_class acpi_sysclass = { |
| 62 | set_kset_name("acpi"), |
| 63 | .shutdown = acpi_shutdown |
| 64 | }; |
| 65 | |
| 66 | static struct sys_device device_acpi = { |
| 67 | .id = 0, |
| 68 | .cls = &acpi_sysclass, |
| 69 | }; |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | static int acpi_poweroff_init(void) |
| 72 | { |
| 73 | if (!acpi_disabled) { |
| 74 | u8 type_a, type_b; |
| 75 | acpi_status status; |
| 76 | |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 77 | status = |
| 78 | acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
| 79 | if (ACPI_SUCCESS(status)) { |
Eric W. Biederman | b35c67a | 2005-07-26 12:17:52 -0600 | [diff] [blame] | 80 | int error; |
| 81 | error = sysdev_class_register(&acpi_sysclass); |
| 82 | if (!error) |
| 83 | error = sysdev_register(&device_acpi); |
| 84 | if (!error) |
| 85 | pm_power_off = acpi_power_off; |
| 86 | return error; |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 87 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | late_initcall(acpi_poweroff_init); |
Eric W. Biederman | b35c67a | 2005-07-26 12:17:52 -0600 | [diff] [blame] | 93 | |
| 94 | #endif /* CONFIG_PM */ |