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/*
* This file is part of the coreboot project.
*
* Copyright 2018 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/acpi_device.h>
#include <arch/acpi_pld.h>
#include <arch/acpigen.h>
#include <console/console.h>
#include <device/device.h>
#include <device/path.h>
#include <stdint.h>
#include "chip.h"
static bool usb_acpi_add_gpios_to_crs(struct drivers_usb_acpi_config *cfg)
{
/*
* Return false if reset GPIO is not provided.
*/
if (cfg->reset_gpio.pin_count == 0)
return false;
return true;
}
static void usb_acpi_fill_ssdt_generator(struct device *dev)
{
struct drivers_usb_acpi_config *config = dev->chip_info;
const char *path = acpi_device_path(dev);
if (!dev->enabled || !path || !config)
return;
/* Don't generate output for hubs, only ports */
if (config->type == UPC_TYPE_HUB)
return;
acpigen_write_scope(path);
if (config->desc)
acpigen_write_name_string("_DDN", config->desc);
acpigen_write_upc(config->type);
if (config->use_custom_pld) {
/* Use board defined PLD */
acpigen_write_pld(&config->custom_pld);
} else {
/* Fill PLD strucutre based on port type */
struct acpi_pld pld;
acpi_pld_fill_usb(&pld, config->type, &config->group);
acpigen_write_pld(&pld);
}
/* Resources */
if (usb_acpi_add_gpios_to_crs(config) == true) {
struct acpi_dp *dsd;
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_gpio(&config->reset_gpio);
acpigen_write_resourcetemplate_footer();
dsd = acpi_dp_new_table("_DSD");
acpi_dp_add_gpio(dsd, "reset-gpio", path, 0, 0,
config->reset_gpio.polarity);
acpi_dp_write(dsd);
}
acpigen_pop_len();
printk(BIOS_INFO, "%s: %s at %s\n", path,
config->desc ? : dev->chip_ops->name, dev_path(dev));
}
static struct device_operations usb_acpi_ops = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
.scan_bus = scan_static_bus,
.acpi_fill_ssdt_generator = usb_acpi_fill_ssdt_generator,
};
static void usb_acpi_enable(struct device *dev)
{
dev->ops = &usb_acpi_ops;
}
struct chip_operations drivers_usb_acpi_ops = {
CHIP_NAME("USB ACPI Device")
.enable_dev = usb_acpi_enable
};
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