Initial import

1 files changed, 535 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
new file mode 100644
index 000000000..73cfa5947
--- /dev/null
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -0,0 +1,535 @@
+/******************************************************************************
+ *
+ * Module Name: hwgpe - Low level GPE enable/disable/clear functions
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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 "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+ACPI_MODULE_NAME("hwgpe")
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
+/* 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,
+				void *context);
+
+static acpi_status
+acpi_hw_gpe_enable_write(u8 enable_mask,
+			 struct acpi_gpe_register_info *gpe_register_info);
+
+/******************************************************************************
+ *
+ * FUNCTION:	acpi_hw_get_gpe_register_bit
+ *
+ * PARAMETERS:	gpe_event_info	    - Info block for the GPE
+ *
+ * RETURN:	Register mask with a one in the GPE bit position
+ *
+ * DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
+ *              correct position for the input GPE.
+ *
+ ******************************************************************************/
+
+u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info)
+{
+
+	return ((u32)1 <<
+		(gpe_event_info->gpe_number -
+		 gpe_event_info->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: Enable or disable a single GPE in the parent enable register.
+ *              The enable_mask field of the involved GPE register must be
+ *              updated by the caller if necessary.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 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 */
+
+	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_read(&enable_mask, &gpe_register_info->enable_address);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	/* Set or clear just the bit that corresponds to this GPE */
+
+	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
+	switch (action) {
+	case ACPI_GPE_CONDITIONAL_ENABLE:
+
+		/* Only enable if the corresponding enable_mask bit is set */
+
+		if (!(register_bit & gpe_register_info->enable_mask)) {
+			return (AE_BAD_PARAMETER);
+		}
+
+		/*lint -fallthrough */
+
+	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 GPE Action, %u", action));
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Write the updated enable mask */
+
+	status = acpi_hw_write(enable_mask, &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)
+{
+	struct acpi_gpe_register_info *gpe_register_info;
+	acpi_status status;
+	u32 register_bit;
+
+	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 a one to the appropriate bit in the status register to
+	 * clear this GPE.
+	 */
+	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
+
+	status = acpi_hw_write(register_bit,
+			       &gpe_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;
+	u32 register_bit;
+	struct acpi_gpe_register_info *gpe_register_info;
+	acpi_event_status local_event_status = 0;
+	acpi_status status;
+
+	ACPI_FUNCTION_ENTRY();
+
+	if (!event_status) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* GPE currently handled? */
+
+	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+	    ACPI_GPE_DISPATCH_NONE) {
+		local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
+	}
+
+	/* 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 = acpi_hw_get_gpe_register_bit(gpe_event_info);
+
+	/* 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 enabled (enable bit == 1)? */
+
+	status = acpi_hw_read(&in_byte, &gpe_register_info->enable_address);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	if (register_bit & in_byte) {
+		local_event_status |= ACPI_EVENT_FLAG_ENABLE_SET;
+	}
+
+	/* GPE currently active (status bit == 1)? */
+
+	status = acpi_hw_read(&in_byte, &gpe_register_info->status_address);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	if (register_bit & in_byte) {
+		local_event_status |= ACPI_EVENT_FLAG_STATUS_SET;
+	}
+
+	/* Set return value */
+
+	(*event_status) = local_event_status;
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_gpe_enable_write
+ *
+ * PARAMETERS:  enable_mask         - Bit mask to write to the GPE register
+ *              gpe_register_info   - Gpe Register info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write the enable mask byte to the given GPE register.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_hw_gpe_enable_write(u8 enable_mask,
+			 struct acpi_gpe_register_info *gpe_register_info)
+{
+	acpi_status status;
+
+	gpe_register_info->enable_mask = enable_mask;
+	status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
+	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, void *context)
+{
+	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_gpe_enable_write(0x00,
+					     &gpe_block->register_info[i]);
+		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, void *context)
+{
+	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_write(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,
+				 void *context)
+{
+	u32 i;
+	acpi_status status;
+	struct acpi_gpe_register_info *gpe_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++) {
+		gpe_register_info = &gpe_block->register_info[i];
+		if (!gpe_register_info->enable_for_run) {
+			continue;
+		}
+
+		/* Enable all "runtime" GPEs in this register */
+
+		status =
+		    acpi_hw_gpe_enable_write(gpe_register_info->enable_for_run,
+					     gpe_register_info);
+		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,
+				void *context)
+{
+	u32 i;
+	acpi_status status;
+	struct acpi_gpe_register_info *gpe_register_info;
+
+	/* Examine each GPE Register within the block */
+
+	for (i = 0; i < gpe_block->register_count; i++) {
+		gpe_register_info = &gpe_block->register_info[i];
+
+		/*
+		 * Enable all "wake" GPEs in this register and disable the
+		 * remaining ones.
+		 */
+
+		status =
+		    acpi_hw_gpe_enable_write(gpe_register_info->enable_for_wake,
+					     gpe_register_info);
+		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, NULL);
+	status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block, NULL);
+	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, NULL);
+	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, NULL);
+	return_ACPI_STATUS(status);
+}
+
+#endif				/* !ACPI_REDUCED_HARDWARE */