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/*
* This file is part of the coreboot project.
*
* Copyright 2019 Google LLC
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/acpigen.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <stdint.h>
#include "chip.h"
#define ACPI_DSM_PRIVACY_SCREEN_UUID "C7033113-8720-4CEB-9090-9D52B3E52D73"
static void privacy_screen_detect_cb(void *arg)
{
struct drivers_generic_gfx_privacy_screen_config *config = arg;
acpigen_write_store();
acpigen_emit_namestring(config->detect_function);
acpigen_emit_byte(LOCAL2_OP);
acpigen_write_if_lequal_op_int(LOCAL2_OP, 1);
acpigen_write_return_singleton_buffer(0xF);
acpigen_pop_len();
}
static void privacy_screen_get_status_cb(void *arg)
{
struct drivers_generic_gfx_privacy_screen_config *config = arg;
acpigen_emit_byte(RETURN_OP);
acpigen_emit_namestring(config->status_function);
}
static void privacy_screen_enable_cb(void *arg)
{
struct drivers_generic_gfx_privacy_screen_config *config = arg;
acpigen_emit_namestring(config->enable_function);
}
static void privacy_screen_disable_cb(void *arg)
{
struct drivers_generic_gfx_privacy_screen_config *config = arg;
acpigen_emit_namestring(config->disable_function);
}
static void (*privacy_screen_callbacks[])(void *) = {
privacy_screen_detect_cb,
privacy_screen_get_status_cb,
privacy_screen_enable_cb,
privacy_screen_disable_cb,
};
static void gfx_fill_ssdt_generator(struct device *dev)
{
size_t i;
struct drivers_generic_gfx_config *config = dev->chip_info;
const char *scope = acpi_device_scope(dev);
acpigen_write_scope(scope);
/* Method (_DOD, 0) */
acpigen_write_method("_DOD", 0);
acpigen_emit_byte(RETURN_OP);
acpigen_write_package(config->device_count);
for (i = 0; i < config->device_count; i++)
acpigen_write_dword(config->device[i].addr);
acpigen_pop_len(); /* End Package. */
acpigen_pop_len(); /* End Method. */
for (i = 0; i < config->device_count; i++) {
acpigen_write_device(config->device[i].name);
acpigen_write_name_integer("_ADR", config->device[i].addr);
acpigen_write_name_integer("_STA", 0xF);
if (config->device[i].privacy.enabled) {
acpigen_write_dsm(ACPI_DSM_PRIVACY_SCREEN_UUID,
privacy_screen_callbacks,
ARRAY_SIZE(privacy_screen_callbacks),
&config->device[i].privacy);
}
acpigen_pop_len(); /* Device */
}
acpigen_pop_len(); /* Scope */
}
static const char *gfx_acpi_name(const struct device *dev)
{
struct drivers_generic_gfx_config *config = dev->chip_info;
return config->name ? : "GFX0";
}
static struct device_operations gfx_ops = {
.acpi_name = gfx_acpi_name,
.acpi_fill_ssdt_generator = gfx_fill_ssdt_generator,
};
static void gfx_enable(struct device *dev)
{
struct drivers_generic_gfx_config *config = dev->chip_info;
if (!config)
return;
dev->ops = &gfx_ops;
}
struct chip_operations drivers_generic_gfx_ops = {
CHIP_NAME("Graphics Device")
.enable_dev = gfx_enable
};
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