diff options
Diffstat (limited to 'src/soc/intel/common/block/usb4')
| -rw-r--r-- | src/soc/intel/common/block/usb4/chip.h | 54 | ||||
| -rw-r--r-- | src/soc/intel/common/block/usb4/pcie.c | 34 |
2 files changed, 67 insertions, 21 deletions
diff --git a/src/soc/intel/common/block/usb4/chip.h b/src/soc/intel/common/block/usb4/chip.h index f2eee4d34c..41f4ed6cab 100644 --- a/src/soc/intel/common/block/usb4/chip.h +++ b/src/soc/intel/common/block/usb4/chip.h @@ -3,10 +3,62 @@ #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; - /* Pointer to USB4 device that this PCIe root port is routed to. */ + /* USB4 host interface (DMA device) that this PCIe root port is routed to. */ DEVTREE_CONST struct device *usb4_port; }; diff --git a/src/soc/intel/common/block/usb4/pcie.c b/src/soc/intel/common/block/usb4/pcie.c index e37d5f4125..eae9027511 100644 --- a/src/soc/intel/common/block/usb4/pcie.c +++ b/src/soc/intel/common/block/usb4/pcie.c @@ -4,19 +4,14 @@ #include <console/console.h> #include <device/device.h> #include <device/path.h> -#include <device/pci.h> -#include <device/pci_def.h> -#include <device/pci_ids.h> -#include <stdlib.h> #include <string.h> -#include <types.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_fill_ssdt(const struct device *dev) +static void usb4_pcie_acpi_fill_ssdt(const struct device *dev) { const struct soc_intel_common_block_usb4_config *config; const struct device *parent; @@ -43,14 +38,15 @@ static void usb4_pcie_fill_ssdt(const struct device *dev) /* 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\n", __func__); + 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(dev)); + acpigen_write_scope(acpi_device_path(parent)); /* Add pointer to USB4 port controller. */ dsd = acpi_dp_new_table("_DSD"); @@ -65,33 +61,31 @@ static void usb4_pcie_fill_ssdt(const struct device *dev) /* Indicate that port is external. */ pkg = acpi_dp_new_table(PCI_EXTERNAL_PORT_UUID); acpi_dp_add_integer(pkg, "ExternalFacingPort", 1); - acpi_dp_add_integer(pkg, "UID", port_id); 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(dev), config->desc, dev_path(dev)); + 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_dev_ops = { - .read_resources = pci_dev_read_resources, - .set_resources = pci_dev_set_resources, - .enable_resources = pci_dev_enable_resources, - .scan_bus = scan_static_bus, +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_fill_ssdt, + .acpi_fill_ssdt = usb4_pcie_acpi_fill_ssdt, #endif }; -static void pcie_enable(struct device *dev) +static void usb4_pcie_acpi_enable(struct device *dev) { - dev->ops = &usb4_dev_ops; + dev->ops = &usb4_pcie_acpi_dev_ops; } struct chip_operations soc_intel_common_block_usb4_ops = { - CHIP_NAME("Intel USB4 Root Port") - .enable_dev = pcie_enable + CHIP_NAME("Intel USB4 PCIe Root Port") + .enable_dev = usb4_pcie_acpi_enable }; |