diff options
Diffstat (limited to 'drivers/acpi/acpica/hwxfsleep.c')
| -rw-r--r-- | drivers/acpi/acpica/hwxfsleep.c | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c index 0ff1ecea5c3..6921c7f3d20 100644 --- a/drivers/acpi/acpica/hwxfsleep.c +++ b/drivers/acpi/acpica/hwxfsleep.c @@ -5,7 +5,7 @@ *****************************************************************************/ /* - * Copyright (C) 2000 - 2012, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -41,16 +41,16 @@ * POSSIBILITY OF SUCH DAMAGES. */ +#define EXPORT_ACPI_INTERFACES + #include <acpi/acpi.h> #include "accommon.h" -#include <linux/module.h> #define _COMPONENT ACPI_HARDWARE ACPI_MODULE_NAME("hwxfsleep") /* Local prototypes */ -static acpi_status -acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id); +static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id); /* * Dispatch table used to efficiently branch to the various sleep @@ -167,7 +167,7 @@ ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64) * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED * ******************************************************************************/ -acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) +acpi_status acpi_enter_sleep_state_s4bios(void) { u32 in_value; acpi_status status; @@ -208,7 +208,7 @@ acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) (u32)acpi_gbl_FADT.s4_bios_request, 8); do { - acpi_os_stall(1000); + acpi_os_stall(ACPI_USEC_PER_MSEC); status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value); if (ACPI_FAILURE(status)) { @@ -234,20 +234,21 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) * function. * ******************************************************************************/ -static acpi_status -acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id) +static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id) { acpi_status status; struct acpi_sleep_functions *sleep_functions = &acpi_sleep_dispatch[function_id]; #if (!ACPI_REDUCED_HARDWARE) - /* * If the Hardware Reduced flag is set (from the FADT), we must - * use the extended sleep registers + * use the extended sleep registers (FADT). Note: As per the ACPI + * specification, these extended registers are to be used for HW-reduced + * platforms only. They are not general-purpose replacements for the + * legacy PM register sleep support. */ - if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) { + if (acpi_gbl_reduced_hardware) { status = sleep_functions->extended_function(sleep_state); } else { /* Legacy sleep */ @@ -316,20 +317,24 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) switch (sleep_state) { case ACPI_STATE_S0: + sst_value = ACPI_SST_WORKING; break; case ACPI_STATE_S1: case ACPI_STATE_S2: case ACPI_STATE_S3: + sst_value = ACPI_SST_SLEEPING; break; case ACPI_STATE_S4: + sst_value = ACPI_SST_SLEEP_CONTEXT; break; default: + sst_value = ACPI_SST_INDICATOR_OFF; /* Default is off */ break; } @@ -352,11 +357,11 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) * * RETURN: Status * - * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) + * DESCRIPTION: Enter a system sleep state * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED * ******************************************************************************/ -acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) +acpi_status acpi_enter_sleep_state(u8 sleep_state) { acpi_status status; @@ -369,8 +374,7 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) return_ACPI_STATUS(AE_AML_OPERAND_VALUE); } - status = - acpi_hw_sleep_dispatch(sleep_state, ACPI_SLEEP_FUNCTION_ID); + status = acpi_hw_sleep_dispatch(sleep_state, ACPI_SLEEP_FUNCTION_ID); return_ACPI_STATUS(status); } @@ -385,8 +389,9 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) * RETURN: Status * * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a - * sleep. - * Called with interrupts DISABLED. + * sleep. Called with interrupts DISABLED. + * We break wake/resume into 2 stages so that OSPM can handle + * various OS-specific tasks between the two steps. * ******************************************************************************/ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) @@ -396,8 +401,7 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); status = - acpi_hw_sleep_dispatch(sleep_state, - ACPI_WAKE_PREP_FUNCTION_ID); + acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_PREP_FUNCTION_ID); return_ACPI_STATUS(status); } |