1 files changed, 477 insertions, 0 deletions
diff --git a/drivers/acpi/hardware/hwgpe.c b/drivers/acpi/hardware/hwgpe.c
new file mode 100644
index 0000000..0b80db9
--- /dev/null
+++ b/drivers/acpi/hardware/hwgpe.c
@@ -0,0 +1,477 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwgpe - Low level GPE enable/disable/clear functions
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include <acpi/acevents.h>
+
+#define _COMPONENT          ACPI_HARDWARE
+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_low_disable_gpe
+ *
+ * PARAMETERS:	gpe_event_info	    - Info block for the GPE to be disabled
+ *
+ * RETURN:	Status
+ *
+ * DESCRIPTION: Disable a single GPE in the enable register.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
+{
+	struct acpi_gpe_register_info *gpe_register_info;
+	acpi_status status;
+	u32 enable_mask;
+
+	/* 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);
+	}
+
+	/* Get current value of the enable register that contains this GPE */
+
+	status = acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, &enable_mask,
+					&gpe_register_info->enable_address);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	/* 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)));
+
+	/* Write the updated enable mask */
+
+	status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, enable_mask,
+					 &gpe_register_info->enable_address);
+
+	return (status);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_write_gpe_enable_reg
+ *
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be enabled
+ *
+ * RETURN:      Status
+ *
+ * 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_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_low_level_write(8, gpe_register_info->enable_for_run,
+					 &gpe_register_info->enable_address);
+
+	return (status);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_clear_gpe
+ *
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be cleared
+ *
+ * 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 status;
+	u8 register_bit;
+
+	ACPI_FUNCTION_ENTRY();
+
+	register_bit = (u8)
+	    (1 <<
+	     (gpe_event_info->gpe_number -
+	      gpe_event_info->register_info->base_gpe_number));
+
+	/*
+	 * Write a one to the appropriate bit in the status register to
+	 * clear this GPE.
+	 */
+	status = acpi_hw_low_level_write(8, register_bit,
+					 &gpe_event_info->register_info->
+					 status_address);
+
+	return (status);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_get_gpe_status
+ *
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to queried
+ *              event_status        - Where the GPE status is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Return the status of a single GPE.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
+		       acpi_event_status * event_status)
+{
+	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 info block for the entire GPE register */
+
+	gpe_register_info = gpe_event_info->register_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));
+
+	/* GPE currently enabled? (enabled for runtime?) */
+
+	if (register_bit & gpe_register_info->enable_for_run) {
+		local_event_status |= ACPI_EVENT_FLAG_ENABLED;
+	}
+
+	/* GPE enabled for wake? */
+
+	if (register_bit & gpe_register_info->enable_for_wake) {
+		local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED;
+	}
+
+	/* GPE currently active (status bit == 1)? */
+
+	status =
+	    acpi_hw_low_level_read(8, &in_byte,
+				   &gpe_register_info->status_address);
+	if (ACPI_FAILURE(status)) {
+		goto unlock_and_exit;
+	}
+
+	if (register_bit & in_byte) {
+		local_event_status |= ACPI_EVENT_FLAG_SET;
+	}
+
+	/* Set return value */
+
+	(*event_status) = local_event_status;
+
+      unlock_and_exit:
+	return (status);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_disable_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * 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)
+{
+	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)) {
+			return (status);
+		}
+	}
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_clear_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * 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)
+{
+	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)) {
+			return (status);
+		}
+	}
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_runtime_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
+ *              combination wake/run GPEs.
+ *
+ ******************************************************************************/
+
+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;
+	acpi_status status;
+
+	/* NOTE: assumes that all GPEs are currently disabled */
+
+	/* Examine each GPE Register within the block */
+
+	for (i = 0; i < gpe_block->register_count; i++) {
+		if (!gpe_block->register_info[i].enable_for_run) {
+			continue;
+		}
+
+		/* Enable all "runtime" GPEs in this register */
+
+		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);
+		}
+	}
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_wakeup_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
+ *              combination wake/run GPEs.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+				struct acpi_gpe_block_info *gpe_block)
+{
+	u32 i;
+	acpi_status status;
+
+	/* Examine each GPE Register within the block */
+
+	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_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_disable_all_gpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_disable_all_gpes(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(hw_disable_all_gpes);
+
+	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);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_all_runtime_gpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_enable_all_runtime_gpes(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes);
+
+	status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block);
+	return_ACPI_STATUS(status);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_all_wakeup_gpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_enable_all_wakeup_gpes(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes);
+
+	status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block);
+	return_ACPI_STATUS(status);
+}