| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <acpi/acpi_device.h> |
| #include <acpi/acpigen.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <string.h> |
| |
| #include "chip.h" |
| |
| #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; |
| 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. */ |
| acpi_device_add_hotplug_support_in_d3(dsd); |
| |
| /* Indicate that port is external. */ |
| acpi_device_add_external_facing_port(dsd); |
| |
| 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 |
| }; |