aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/hwgpe.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/acpica/hwgpe.c')
-rw-r--r--drivers/acpi/acpica/hwgpe.c94
1 files changed, 65 insertions, 29 deletions
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index bd72319a38f..3450309c278 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -57,21 +57,47 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
/******************************************************************************
*
- * FUNCTION: acpi_hw_low_disable_gpe
+ * FUNCTION: acpi_hw_gpe_register_bit
+ *
+ * PARAMETERS: gpe_event_info - Info block for the GPE
+ * gpe_register_info - Info block for the GPE register
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Compute GPE enable mask with one bit corresponding to the given
+ * GPE set.
+ *
+ ******************************************************************************/
+
+u32 acpi_hw_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info,
+ struct acpi_gpe_register_info *gpe_register_info)
+{
+ return (u32)1 << (gpe_event_info->gpe_number -
+ gpe_register_info->base_gpe_number);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION: acpi_hw_low_set_gpe
*
* PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
+ * action - Enable or disable
*
* RETURN: Status
*
- * DESCRIPTION: Disable a single GPE in the enable register.
+ * DESCRIPTION: Enable or disable a single GPE in its enable register.
*
******************************************************************************/
-acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
+acpi_status
+acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 action)
{
struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
u32 enable_mask;
+ u32 register_bit;
+
+ ACPI_FUNCTION_ENTRY();
/* Get the info block for the entire GPE register */
@@ -87,11 +113,27 @@ acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
return (status);
}
- /* Clear just the bit that corresponds to this GPE */
+ /* Set ot clear just the bit that corresponds to this GPE */
- ACPI_CLEAR_BIT(enable_mask, ((u32)1 <<
- (gpe_event_info->gpe_number -
- gpe_register_info->base_gpe_number)));
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
+ switch (action) {
+ case ACPI_GPE_COND_ENABLE:
+ if (!(register_bit & gpe_register_info->enable_for_run))
+ return (AE_BAD_PARAMETER);
+
+ case ACPI_GPE_ENABLE:
+ ACPI_SET_BIT(enable_mask, register_bit);
+ break;
+
+ case ACPI_GPE_DISABLE:
+ ACPI_CLEAR_BIT(enable_mask, register_bit);
+ break;
+
+ default:
+ ACPI_ERROR((AE_INFO, "Invalid action\n"));
+ return (AE_BAD_PARAMETER);
+ }
/* Write the updated enable mask */
@@ -116,23 +158,11 @@ acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
acpi_status
acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info)
{
- 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_NOT_EXIST);
- }
-
- /* Write the entire GPE (runtime) enable register */
-
- status = acpi_hw_write(gpe_register_info->enable_for_run,
- &gpe_register_info->enable_address);
-
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_COND_ENABLE);
return (status);
}
@@ -150,21 +180,28 @@ acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info)
acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)
{
+ struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
- u8 register_bit;
+ u32 register_bit;
ACPI_FUNCTION_ENTRY();
- register_bit = (u8)(1 <<
- (gpe_event_info->gpe_number -
- gpe_event_info->register_info->base_gpe_number));
+ /* Get the info block for the entire GPE register */
+
+ gpe_register_info = gpe_event_info->register_info;
+ if (!gpe_register_info) {
+ return (AE_NOT_EXIST);
+ }
+
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
/*
* Write a one to the appropriate bit in the status register to
* clear this GPE.
*/
status = acpi_hw_write(register_bit,
- &gpe_event_info->register_info->status_address);
+ &gpe_register_info->status_address);
return (status);
}
@@ -187,7 +224,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
acpi_event_status * event_status)
{
u32 in_byte;
- u8 register_bit;
+ u32 register_bit;
struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
acpi_event_status local_event_status = 0;
@@ -204,9 +241,8 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
/* Get the register bitmask for this GPE */
- register_bit = (u8)(1 <<
- (gpe_event_info->gpe_number -
- gpe_event_info->register_info->base_gpe_number));
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
/* GPE currently enabled? (enabled for runtime?) */