*****************************************************************************/
/*
- * Copyright (C) 2000 - 2004, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <acpi/acevents.h>
#define _COMPONENT ACPI_HARDWARE
- ACPI_MODULE_NAME ("hwgpe")
-
-
-/******************************************************************************
- *
- * FUNCTION: acpi_hw_enable_gpe
- *
- * PARAMETERS: gpe_event_info - Info block for the GPE to be enabled
- *
- * RETURN: Status
- *
- * DESCRIPTION: Enable a single GPE.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_hw_enable_gpe (
- struct acpi_gpe_event_info *gpe_event_info)
-{
- u32 in_byte;
- acpi_status status;
-
-
- ACPI_FUNCTION_ENTRY ();
-
-
- /*
- * Read the current value of the register, set the appropriate bit
- * to enable the GPE, and write out the new register.
- */
- status = acpi_hw_low_level_read (8, &in_byte,
- &gpe_event_info->register_info->enable_address);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- /* Write with the new GPE bit enabled */
-
- status = acpi_hw_low_level_write (8, (in_byte | gpe_event_info->bit_mask),
- &gpe_event_info->register_info->enable_address);
-
- return (status);
-}
+ACPI_MODULE_NAME("hwgpe")
+/* Local prototypes */
+static acpi_status
+acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+ struct acpi_gpe_block_info *gpe_block);
/******************************************************************************
*
- * FUNCTION: acpi_hw_enable_gpe_for_wakeup
+ * FUNCTION: acpi_hw_write_gpe_enable_reg
*
* PARAMETERS: gpe_event_info - Info block for the GPE to be enabled
*
- * RETURN: None
- *
- * DESCRIPTION: Keep track of which GPEs the OS has requested not be
- * disabled when going to sleep.
- *
- ******************************************************************************/
-
-void
-acpi_hw_enable_gpe_for_wakeup (
- struct acpi_gpe_event_info *gpe_event_info)
-{
- struct acpi_gpe_register_info *gpe_register_info;
-
-
- ACPI_FUNCTION_ENTRY ();
-
-
- /* Get the info block for the entire GPE register */
-
- gpe_register_info = gpe_event_info->register_info;
- if (!gpe_register_info) {
- return;
- }
-
- /*
- * Set the bit so we will not enable this GPE when sleeping (and disable
- * it upon wake)
- */
- gpe_register_info->wake_enable |= gpe_event_info->bit_mask;
- gpe_event_info->flags |= (ACPI_GPE_TYPE_WAKE | ACPI_GPE_ENABLED);
-}
-
-
-/******************************************************************************
- *
- * FUNCTION: acpi_hw_disable_gpe
- *
- * PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
- *
* RETURN: Status
*
- * DESCRIPTION: Disable a single GPE.
+ * DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must
+ * already be cleared or set in the parent register
+ * enable_for_run mask.
*
******************************************************************************/
acpi_status
-acpi_hw_disable_gpe (
- struct acpi_gpe_event_info *gpe_event_info)
+acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info *gpe_event_info)
{
- u32 in_byte;
- acpi_status status;
- struct acpi_gpe_register_info *gpe_register_info;
-
-
- ACPI_FUNCTION_ENTRY ();
+ struct acpi_gpe_register_info *gpe_register_info;
+ acpi_status status;
+ ACPI_FUNCTION_ENTRY();
/* Get the info block for the entire GPE register */
gpe_register_info = gpe_event_info->register_info;
if (!gpe_register_info) {
- return (AE_BAD_PARAMETER);
- }
-
- /*
- * Read the current value of the register, clear the appropriate bit,
- * and write out the new register value to disable the GPE.
- */
- status = acpi_hw_low_level_read (8, &in_byte,
- &gpe_register_info->enable_address);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- /* Write the byte with this GPE bit cleared */
-
- status = acpi_hw_low_level_write (8, (in_byte & ~(gpe_event_info->bit_mask)),
- &gpe_register_info->enable_address);
- if (ACPI_FAILURE (status)) {
- return (status);
+ return (AE_NOT_EXIST);
}
- /* Make sure this GPE is disabled for wake, also */
-
- acpi_hw_disable_gpe_for_wakeup (gpe_event_info);
- return (AE_OK);
-}
-
-
-/******************************************************************************
- *
- * FUNCTION: acpi_hw_disable_gpe_for_wakeup
- *
- * PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
- *
- * RETURN: None
- *
- * DESCRIPTION: Keep track of which GPEs the OS has requested not be
- * disabled when going to sleep.
- *
- ******************************************************************************/
-
-void
-acpi_hw_disable_gpe_for_wakeup (
- struct acpi_gpe_event_info *gpe_event_info)
-{
- struct acpi_gpe_register_info *gpe_register_info;
-
-
- ACPI_FUNCTION_ENTRY ();
+ /* Write the entire GPE (runtime) enable register */
+ status = acpi_hw_low_level_write(8, gpe_register_info->enable_for_run,
+ &gpe_register_info->enable_address);
- /* Get the info block for the entire GPE register */
-
- gpe_register_info = gpe_event_info->register_info;
- if (!gpe_register_info) {
- return;
- }
-
- /* Clear the bit so we will disable this when sleeping */
-
- gpe_register_info->wake_enable &= ~(gpe_event_info->bit_mask);
+ return (status);
}
-
/******************************************************************************
*
* FUNCTION: acpi_hw_clear_gpe
*
* PARAMETERS: gpe_event_info - Info block for the GPE to be cleared
*
- * RETURN: status_status
+ * RETURN: Status
*
* DESCRIPTION: Clear the status bit for a single GPE.
*
******************************************************************************/
-acpi_status
-acpi_hw_clear_gpe (
- struct acpi_gpe_event_info *gpe_event_info)
+acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)
{
- acpi_status status;
-
-
- ACPI_FUNCTION_ENTRY ();
+ acpi_status status;
+ ACPI_FUNCTION_ENTRY();
/*
* Write a one to the appropriate bit in the status register to
* clear this GPE.
*/
- status = acpi_hw_low_level_write (8, gpe_event_info->bit_mask,
- &gpe_event_info->register_info->status_address);
+ status = acpi_hw_low_level_write(8, gpe_event_info->register_bit,
+ &gpe_event_info->register_info->
+ status_address);
return (status);
}
-
/******************************************************************************
*
* FUNCTION: acpi_hw_get_gpe_status
*
******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
acpi_status
-acpi_hw_get_gpe_status (
- struct acpi_gpe_event_info *gpe_event_info,
- acpi_event_status *event_status)
+acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
+ acpi_event_status * event_status)
{
- u32 in_byte;
- u8 bit_mask;
- struct acpi_gpe_register_info *gpe_register_info;
- acpi_status status;
- acpi_event_status local_event_status = 0;
-
-
- ACPI_FUNCTION_ENTRY ();
+ u32 in_byte;
+ u8 register_bit;
+ struct acpi_gpe_register_info *gpe_register_info;
+ acpi_status status;
+ acpi_event_status local_event_status = 0;
+ ACPI_FUNCTION_ENTRY();
if (!event_status) {
return (AE_BAD_PARAMETER);
/* Get the register bitmask for this GPE */
- bit_mask = gpe_event_info->bit_mask;
+ register_bit = gpe_event_info->register_bit;
- /* GPE Enabled? */
-
- status = acpi_hw_low_level_read (8, &in_byte, &gpe_register_info->enable_address);
- if (ACPI_FAILURE (status)) {
- goto unlock_and_exit;
- }
+ /* GPE currently enabled? (enabled for runtime?) */
- if (bit_mask & in_byte) {
+ if (register_bit & gpe_register_info->enable_for_run) {
local_event_status |= ACPI_EVENT_FLAG_ENABLED;
}
- /* GPE Enabled for wake? */
+ /* GPE enabled for wake? */
- if (bit_mask & gpe_register_info->wake_enable) {
+ if (register_bit & gpe_register_info->enable_for_wake) {
local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED;
}
- /* GPE active (set)? */
+ /* GPE currently active (status bit == 1)? */
- status = acpi_hw_low_level_read (8, &in_byte, &gpe_register_info->status_address);
- if (ACPI_FAILURE (status)) {
+ status =
+ acpi_hw_low_level_read(8, &in_byte,
+ &gpe_register_info->status_address);
+ if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
- if (bit_mask & in_byte) {
+ if (register_bit & in_byte) {
local_event_status |= ACPI_EVENT_FLAG_SET;
}
(*event_status) = local_event_status;
-
-unlock_and_exit:
+ unlock_and_exit:
return (status);
}
-
+#endif /* ACPI_FUTURE_USAGE */
/******************************************************************************
*
*
* RETURN: Status
*
- * DESCRIPTION: Disable all GPEs within a GPE block
+ * DESCRIPTION: Disable all GPEs within a single GPE block
*
******************************************************************************/
acpi_status
-acpi_hw_disable_gpe_block (
- struct acpi_gpe_xrupt_info *gpe_xrupt_info,
- struct acpi_gpe_block_info *gpe_block)
+acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info,
+ struct acpi_gpe_block_info * gpe_block)
{
- u32 i;
- acpi_status status;
-
+ u32 i;
+ acpi_status status;
/* Examine each GPE Register within the block */
for (i = 0; i < gpe_block->register_count; i++) {
+
/* Disable all GPEs in this register */
- status = acpi_hw_low_level_write (8, 0x00,
- &gpe_block->register_info[i].enable_address);
- if (ACPI_FAILURE (status)) {
+ status = acpi_hw_low_level_write(8, 0x00,
+ &gpe_block->register_info[i].
+ enable_address);
+ if (ACPI_FAILURE(status)) {
return (status);
}
}
return (AE_OK);
}
-
/******************************************************************************
*
* FUNCTION: acpi_hw_clear_gpe_block
*
* RETURN: Status
*
- * DESCRIPTION: Clear status bits for all GPEs within a GPE block
+ * DESCRIPTION: Clear status bits for all GPEs within a single GPE block
*
******************************************************************************/
acpi_status
-acpi_hw_clear_gpe_block (
- struct acpi_gpe_xrupt_info *gpe_xrupt_info,
- struct acpi_gpe_block_info *gpe_block)
+acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info,
+ struct acpi_gpe_block_info * gpe_block)
{
- u32 i;
- acpi_status status;
-
+ u32 i;
+ acpi_status status;
/* Examine each GPE Register within the block */
for (i = 0; i < gpe_block->register_count; i++) {
+
/* Clear status on all GPEs in this register */
- status = acpi_hw_low_level_write (8, 0xFF,
- &gpe_block->register_info[i].status_address);
- if (ACPI_FAILURE (status)) {
+ status = acpi_hw_low_level_write(8, 0xFF,
+ &gpe_block->register_info[i].
+ status_address);
+ if (ACPI_FAILURE(status)) {
return (status);
}
}
return (AE_OK);
}
-
/******************************************************************************
*
- * FUNCTION: acpi_hw_prepare_gpe_block_for_sleep
+ * FUNCTION: acpi_hw_enable_runtime_gpe_block
*
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
* gpe_block - Gpe Block info
*
* RETURN: Status
*
- * DESCRIPTION: Disable all runtime GPEs and enable all wakeup GPEs -- within
- * a single GPE block
+ * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
+ * combination wake/run GPEs.
*
******************************************************************************/
-static acpi_status
-acpi_hw_prepare_gpe_block_for_sleep (
- struct acpi_gpe_xrupt_info *gpe_xrupt_info,
- struct acpi_gpe_block_info *gpe_block)
+acpi_status
+acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info,
+ struct acpi_gpe_block_info * gpe_block)
{
- u32 i;
- struct acpi_gpe_register_info *gpe_register_info;
- u32 in_value;
- acpi_status status;
-
-
- /* Get the register info for the entire GPE block */
+ u32 i;
+ acpi_status status;
- gpe_register_info = gpe_block->register_info;
+ /* NOTE: assumes that all GPEs are currently disabled */
/* Examine each GPE Register within the block */
for (i = 0; i < gpe_block->register_count; i++) {
- /*
- * Read the enabled/disabled status of all GPEs. We
- * will be using it to restore all the GPEs later.
- *
- * NOTE: Wake GPEs are are ALL disabled at this time, so when we wake
- * and restore this register, they will be automatically disabled.
- */
- status = acpi_hw_low_level_read (8, &in_value,
- &gpe_register_info->enable_address);
- if (ACPI_FAILURE (status)) {
- return (status);
+ if (!gpe_block->register_info[i].enable_for_run) {
+ continue;
}
- gpe_register_info->enable = (u8) in_value;
+ /* Enable all "runtime" GPEs in this register */
- /*
- * 1) Disable all runtime GPEs
- * 2) Enable all wakeup GPEs
- */
- status = acpi_hw_low_level_write (8, gpe_register_info->wake_enable,
- &gpe_register_info->enable_address);
- if (ACPI_FAILURE (status)) {
+ status =
+ acpi_hw_low_level_write(8,
+ gpe_block->register_info[i].
+ enable_for_run,
+ &gpe_block->register_info[i].
+ enable_address);
+ if (ACPI_FAILURE(status)) {
return (status);
}
-
- /* Point to next GPE register */
-
- gpe_register_info++;
}
return (AE_OK);
}
-
/******************************************************************************
*
- * FUNCTION: acpi_hw_prepare_gpes_for_sleep
+ * FUNCTION: acpi_hw_enable_wakeup_gpe_block
*
- * PARAMETERS: None
+ * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
+ * gpe_block - Gpe Block info
*
* RETURN: Status
*
- * DESCRIPTION: Disable all runtime GPEs, enable all wake GPEs.
- * Called with interrupts disabled. The interrupt handler also
- * modifies gpe_register_info->Enable, so it should not be
- * given the chance to run until after the runtime GPEs are
- * re-enabled.
+ * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
+ * combination wake/run GPEs.
*
******************************************************************************/
-acpi_status
-acpi_hw_prepare_gpes_for_sleep (
- void)
+static acpi_status
+acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+ struct acpi_gpe_block_info *gpe_block)
{
- acpi_status status;
+ u32 i;
+ acpi_status status;
+ /* Examine each GPE Register within the block */
- ACPI_FUNCTION_ENTRY ();
+ for (i = 0; i < gpe_block->register_count; i++) {
+ if (!gpe_block->register_info[i].enable_for_wake) {
+ continue;
+ }
+ /* Enable all "wake" GPEs in this register */
- status = acpi_ev_walk_gpe_list (acpi_hw_prepare_gpe_block_for_sleep);
- return (status);
-}
+ status = acpi_hw_low_level_write(8,
+ gpe_block->register_info[i].
+ enable_for_wake,
+ &gpe_block->register_info[i].
+ enable_address);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+ }
+ return (AE_OK);
+}
/******************************************************************************
*
- * FUNCTION: acpi_hw_restore_gpe_block_on_wake
+ * FUNCTION: acpi_hw_disable_all_gpes
*
- * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
- * gpe_block - Gpe Block info
+ * PARAMETERS: None
*
* RETURN: Status
*
- * DESCRIPTION: Enable all runtime GPEs and disable all wake GPEs -- in one
- * GPE block
+ * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
*
******************************************************************************/
-static acpi_status
-acpi_hw_restore_gpe_block_on_wake (
- struct acpi_gpe_xrupt_info *gpe_xrupt_info,
- struct acpi_gpe_block_info *gpe_block)
+acpi_status acpi_hw_disable_all_gpes(void)
{
- u32 i;
- struct acpi_gpe_register_info *gpe_register_info;
- acpi_status status;
-
-
- /* This callback processes one entire GPE block */
-
- /* Get the register info for the entire GPE block */
-
- gpe_register_info = gpe_block->register_info;
+ acpi_status status;
- /* Examine each GPE register within the block */
+ ACPI_FUNCTION_TRACE(hw_disable_all_gpes);
- for (i = 0; i < gpe_block->register_count; i++) {
- /* Clear the entire status register */
-
- status = acpi_hw_low_level_write (8, 0xFF,
- &gpe_block->register_info[i].status_address);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
+ status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block);
+ status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block);
+ return_ACPI_STATUS(status);
+}
- /*
- * Restore the GPE Enable register, which will do the following:
- *
- * 1) Disable all wakeup GPEs
- * 2) Enable all runtime GPEs
- *
- * (On sleep, we saved the enabled status of all GPEs)
- */
- status = acpi_hw_low_level_write (8, gpe_register_info->enable,
- &gpe_register_info->enable_address);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
+/******************************************************************************
+ *
+ * FUNCTION: acpi_hw_enable_all_runtime_gpes
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
+ *
+ ******************************************************************************/
- /* Point to next GPE register */
+acpi_status acpi_hw_enable_all_runtime_gpes(void)
+{
+ acpi_status status;
- gpe_register_info++;
- }
+ ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes);
- return (AE_OK);
+ status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block);
+ return_ACPI_STATUS(status);
}
-
/******************************************************************************
*
- * FUNCTION: acpi_hw_restore_gpes_on_wake
+ * FUNCTION: acpi_hw_enable_all_wakeup_gpes
*
* PARAMETERS: None
*
* RETURN: Status
*
- * DESCRIPTION: Enable all runtime GPEs and disable all wake GPEs -- in all
- * GPE blocks
+ * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
*
******************************************************************************/
-acpi_status
-acpi_hw_restore_gpes_on_wake (
- void)
+acpi_status acpi_hw_enable_all_wakeup_gpes(void)
{
- acpi_status status;
-
+ acpi_status status;
- ACPI_FUNCTION_ENTRY ();
+ ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes);
-
- status = acpi_ev_walk_gpe_list (acpi_hw_restore_gpe_block_on_wake);
- return (status);
+ status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block);
+ return_ACPI_STATUS(status);
}
git://git.onelab.eu / linux-2.6.git / blobdiff