# Locate the PCIe firmware sources

The PCIe subsystem is configured through UEFI.

Use the following list to locate the UEFI device tree, driver, and
library source paths for PCIe before you configure the subsystem.

The following list identifies the UEFI device tree, driver, and library
source paths for PCIe:

- `uefi_images/edk2-non-oss-qualcomm/Platform/Qualcomm/GlymurFamily/Settings/Common/DeviceTree/Default/Core/PCIe`
- `uefi_images/edk2-non-oss-qualcomm/Platform/Qualcomm/GlymurFamily/Settings/Glymur/DeviceTree/Default/Core/PCIe`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/Settings/Common/DeviceTree/Core/PCIe`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/Settings/Glymur/DeviceTree/Default/Core/PCIe`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Drivers/PcieFwDxe`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Drivers/PcieSlotDxe`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Drivers/PciPlatformDxe`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Drivers/XhciPciEmulationDxe`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Library/PcieLibSupport`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Library/PcieRpLib`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Library/PcieRpLib/Core`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Library/PciHostBridgeLib`
- `uefi_images/edk2-non-oss-qualcomm/Silicon/Qualcomm/GlymurFamily/GlymurSiliconPkg/Library/PciSegmentInfoLib`

## Related

- [Linux USB features](https://docs.qualcomm.com/doc/80-A0399-8/topic/linux-usb-features.html)
- [USB kernel configurations](https://docs.qualcomm.com/doc/80-A0399-8/topic/usb-kernel-configurations.html)
- [Enable a USB controller in Device mode](https://docs.qualcomm.com/doc/80-A0399-8/topic/enable-usb-controller-device-mode.html)

Last Published: Sep 17, 2026

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