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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __DRIVERS_INTEL_USB4_PCIE_H__
#define __DRIVERS_INTEL_USB4_PCIE_H__
/*
* This virtual generic driver provides the ACPI properties for an
* Intel USB4/TBT PCIe Root Port which is already declared in the DSDT,
*
* The associated USB4 port number is obtained from the generic ID and
* the related host interface (DMA) device is provided by the devicetree.
*
* The "ExternalFacingPort", and "HotPlugSupportInD3" properties are defined at
* https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports
*
* Example: PCIe Root Port 2 via USB4 host interface 1 port 0:
*
* device pci 0d.3 alias tbt_dma1 on end # \_SB.PCI0.TDM1
* device pci 07.2 alias tbt_pcie_rp2 on # \_SB.PCI0.TRP2
* chip soc/intel/common/block/usb4
* use tbt_dma1 as usb4_port # USB4 host interface for this root port
* device generic 0 on end # USB4 port number on this host interface
* end
* end
*
* The host interface and PCIe Root Port are declared in the DSDT:
*
* Scope (\_SB.PCI0) {
* Device (TDM1) {
* Name (_ADR, 0x000d0003)
* }
* Device (TRP2) {
* Name (_ADR, 0x00070002)
* }
* }
*
* This driver will provide the following properties in the SSDT:
*
* Scope (\_SB.PCI0.TRP2) {
* Name (_DSD, Package () {
* ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
* Package () {
* Package () { "usb4-host-interface", \_SB.PCI0.TDM1 },
* Package () { "usb4-port-number", 0 },
* },
* ToUUID ("6211e2c0-58a3-4af3-90e1-927a4e0c55a4"),
* Package () {
* Package () { "HotPlugSupportInD3", 1 },
* },
* ToUUID ("efcc06cc-73ac-4bc3-bff0-76143807c389"),
* Package () {
* Package () { "ExternalFacingPort", 1 },
* },
* }
* }
*/
struct soc_intel_common_block_usb4_config {
const char *desc;
/* USB4 host interface (DMA device) that this PCIe root port is routed to. */
DEVTREE_CONST struct device *usb4_port;
};
#endif /* __DRIVERS_INTEL_USB4_PCIE_H__ */
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