projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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. | |
| e2a5b420 AS |
6 | * |
| 7 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> | |
| 8 | * | |
| 9 | * This file is released under the GPLv2. | |
| 1da177e4 LT |
10 | */ |
| 11 | ||
| 12 | #include <linux/pm.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <acpi/acpi_bus.h> | |
| e2a5b420 AS |
15 | #include <linux/sysdev.h> |
| 16 | #include <asm/io.h> | |
| 1da177e4 LT |
17 | #include "sleep.h" |
| 18 | ||
| e2a5b420 AS |
19 | int acpi_sleep_prepare(u32 acpi_state) |
| 20 | { | |
| e2a5b420 AS |
21 | #ifdef CONFIG_ACPI_SLEEP |
| 22 | /* do we have a wakeup address for S2 and S3? */ | |
| b01d8684 | 23 | if (acpi_state == ACPI_STATE_S3) { |
| e2a5b420 AS |
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); | |
| 34 | #endif | |
| 729b4d4c | 35 | acpi_gpe_sleep_prepare(acpi_state); |
| e2a5b420 AS |
36 | acpi_enter_sleep_state_prep(acpi_state); |
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| b35c67a4 EB |
40 | #ifdef CONFIG_PM |
| 41 | ||
| bd804eba RW |
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) | |
| 1da177e4 | 49 | { |
| b35c67a4 | 50 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ |
| e2a5b420 | 51 | printk("%s called\n", __FUNCTION__); |
| e2a5b420 | 52 | local_irq_disable(); |
| 1da177e4 | 53 | /* Some SMP machines only can poweroff in boot CPU */ |
| 1da177e4 LT |
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 | ||
| e2a5b420 AS |
63 | status = |
| 64 | acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); | |
| 65 | if (ACPI_SUCCESS(status)) { | |
| bd804eba RW |
66 | pm_power_off_prepare = acpi_power_off_prepare; |
| 67 | pm_power_off = acpi_power_off; | |
| e2a5b420 | 68 | } |
| 1da177e4 LT |
69 | } |
| 70 | return 0; | |
| 71 | } | |
| 72 | ||
| 73 | late_initcall(acpi_poweroff_init); | |
| b35c67a4 | 74 | |
| 4be44fcd | 75 | #endif /* CONFIG_PM */ |