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/*
* Copyright 2012 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include "drmP.h"
#include "drm.h"
#include "drm_sarea.h"
#include "drm_crtc_helper.h"
#include "radeon.h"
#include "radeon_acpi.h"
#include <linux/vga_switcheroo.h>
/* Call the ATIF method
*/
static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
struct acpi_buffer *params)
{
acpi_status status;
union acpi_object atif_arg_elements[2];
struct acpi_object_list atif_arg;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
atif_arg.count = 2;
atif_arg.pointer = &atif_arg_elements[0];
atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
atif_arg_elements[0].integer.value = function;
if (params) {
atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
atif_arg_elements[1].buffer.length = params->length;
atif_arg_elements[1].buffer.pointer = params->pointer;
} else {
/* We need a second fake parameter */
atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
atif_arg_elements[1].integer.value = 0;
}
status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
/* Fail only if calling the method fails and ATIF is supported */
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
acpi_format_exception(status));
kfree(buffer.pointer);
return NULL;
}
return buffer.pointer;
}
/* Call all ACPI methods here */
int radeon_acpi_init(struct radeon_device *rdev)
{
acpi_handle handle;
union acpi_object *info;
int ret = 0;
/* Get the device handle */
handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
/* No need to proceed if we're sure that ATIF is not supported */
if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
return 0;
/* Call the ATIF method */
info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
if (!info)
ret = -EIO;
kfree(info);
return ret;
}
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