1 files changed, 469 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
new file mode 100644
index 000000000000..2b4a85a839d1
--- /dev/null
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -0,0 +1,469 @@
+
+/******************************************************************************
+ *
+ * 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/accommon.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,
+                                void *context);
+
+/******************************************************************************
+ *
+ * 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_read(&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_write(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_write(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_write(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_read(&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, 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_write(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, 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_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;
+
+        /* 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_write(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,
+                                void *context)
+{
+        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_write(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, 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);
+}