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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <acpi/acpigen.h>
#include <console/console.h>
#include <device/device.h>
#include <device/path.h>
#include <string.h>
#include "chip.h"
#define PCI_HOTPLUG_IN_D3_UUID "6211E2C0-58A3-4AF3-90E1-927A4E0C55A4"
#define PCI_EXTERNAL_PORT_UUID "EFCC06CC-73AC-4BC3-BFF0-76143807C389"
#if CONFIG(HAVE_ACPI_TABLES)
static void usb4_pcie_acpi_fill_ssdt(const struct device *dev)
{
const struct soc_intel_common_block_usb4_config *config;
const struct device *parent;
struct acpi_dp *dsd, *pkg;
const char *usb4_path;
int port_id;
/* Get parent PCI device */
parent = dev->bus->dev;
if (!parent) {
printk(BIOS_ERR, "%s: Unable to find parent device\n", __func__);
return;
}
if (!parent->enabled)
return;
config = config_of(dev);
if (!config->usb4_port) {
printk(BIOS_ERR, "%s: Unable to find reference to usb4_port\n", __func__);
return;
}
/* Get ACPI path to USB4 device. */
usb4_path = acpi_device_path(config->usb4_port);
if (!usb4_path) {
printk(BIOS_ERR, "%s: Unable to find ACPI path for usb4_port %s\n",
__func__, dev_path(config->usb4_port));
return;
}
usb4_path = strdup(usb4_path);
port_id = dev->path.generic.id;
acpigen_write_scope(acpi_device_path(parent));
/* Add pointer to USB4 port controller. */
dsd = acpi_dp_new_table("_DSD");
acpi_dp_add_reference(dsd, "usb4-host-interface", usb4_path);
acpi_dp_add_integer(dsd, "usb4-port-number", port_id);
/* Indicate that device supports hotplug in D3. */
pkg = acpi_dp_new_table(PCI_HOTPLUG_IN_D3_UUID);
acpi_dp_add_integer(pkg, "HotPlugSupportInD3", 1);
acpi_dp_add_package(dsd, pkg);
/* Indicate that port is external. */
pkg = acpi_dp_new_table(PCI_EXTERNAL_PORT_UUID);
acpi_dp_add_integer(pkg, "ExternalFacingPort", 1);
acpi_dp_add_package(dsd, pkg);
acpi_dp_write(dsd);
acpigen_pop_len(); /* Scope */
printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(parent),
config->desc ? : dev->chip_ops->name, dev_path(parent));
}
#endif
static struct device_operations usb4_pcie_acpi_dev_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
#if CONFIG(HAVE_ACPI_TABLES)
.acpi_fill_ssdt = usb4_pcie_acpi_fill_ssdt,
#endif
};
static void usb4_pcie_acpi_enable(struct device *dev)
{
dev->ops = &usb4_pcie_acpi_dev_ops;
}
struct chip_operations soc_intel_common_block_usb4_ops = {
CHIP_NAME("Intel USB4 PCIe Root Port")
.enable_dev = usb4_pcie_acpi_enable
};
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