Tianocore/edk2.git/MdeModulePkg/Bus/Usb, branch master

MdeModulePkg/UsbBusDxe: Raise TPL to CALLBACK for wanted UsbIo connect

2026-09-21T06:06:06+00:00

Raise TPL to TPL_CALLBACK around the ConnectController() call in UsbBusRecursivelyConnectWantedUsbIo() and restore the original TPL afterward. UsbBusRecursivelyConnectWantedUsbIo() is normally reached through the DriverBinding Start routine invoked by gBS->ConnectController(), which runs at TPL_APPLICATION. While the wanted UsbIo handle is being connected, the USB device can be removed. The device removal polling event in UsbBus runs at TPL_CALLBACK. If the connect runs at TPL_APPLICATION, that event can preempt the connection and cause commands to be sent to a stale or non-existent USB device address, producing a lot of timeout transfers. This differs from UsbConnectDriver(), which is called from the enumeration polling event (XHCI async event) and is usually already at TPL_CALLBACK or TPL_NOTIFY. That function uses RestoreTPL()/ RaiseTPL() to ensure ConnectController() runs at TPL_CALLBACK. Signed-off-by: Marlboro_Chuang

MdeModulePkg/UsbBusDxe: Handle a quirk in Interface descriptor

2026-09-21T04:54:36+00:00

Some specific device requires a quirk in the Interface descriptor for InterfaceNumber to work properly [Suggested Solution] Implement the mechanism to ensure the first InterfaceNumber not equal to zero. Signed-off-by: Marlboro_Chuang

MdeModulePkg/UsbBusDxe: Fix UsbPortReset might run into recursive loop

2026-07-31T10:54:54+00:00

UsbSelectConfig will introduce the UsbConnectDriver call. If this UsbPortReset is happened in the Usb device driver Start() routine and the device FW can not be recovered by PortReset, the UsbSelectConfig will introduce the recursive loop. [Suggested solution] Since UsbPortReset should not change the Bus Topology, the Reset flow should only SetAddress and reconfigure the device. Signed-off-by: Marlboro Chuang Signed-off-by: Jared Pan

MdeModulePkg/UsbBusDxe: BOS Descriptor Check for SS Devices

2026-07-22T07:25:57+00:00

Some SuperSpeed-capable devices may fall back to High-Speed mode and cause subsequent commands to fail. [Suggested Solution] Check the BOS descriptor to verify SuperSpeed support and trigger a port reset if needed to re-enumerate the device properly. Signed-off-by: Marlboro Chuang Signed-off-by: Jared Pan

MdeModulePkg/UsbBusPei: Use dynamic buffer for USB configuration data

2026-07-21T03:50:20+00:00

USB devices whose configuration descriptor TotalLength exceeds 1024 bytes (e.g. IR cameras with large descriptor tables) previously hit an EFI_DEVICE_ERROR hard-limit and failed to enumerate in PEI. Replace the fixed array with a UINT8 * pointer and dynamically allocate the exact amount of memory required via PeiServicesAllocatePool() after the TotalLength is learned from the initial 4-byte descriptor probe. Signed-off-by: Damien Chen

MdeModulePkg/UsbBusDxe: Manufacturer String Descriptor Caching

2026-06-30T11:47:34+00:00

Certain devices require immediate follow-up commands after reading the LANGID string to fetch Manufacturer, Product, or SerialNumber strings. [Suggested Solution] These strings are now cached after initial retrieval to allow UsbIoGetStringDescriptor() to return them directly, improving efficiency and stability. Signed-off-by: Marlboro Chuang Signed-off-by: Jared Pan

MdeModulePkg/UsbBusDxe: Improve USB enumerating process

2026-06-30T10:35:12+00:00

The patch enhances the USB enumeration process in EDK2 to improve compatibility with non-standards-compliant devices that may fail during standard enumeration sequences. The suggested solution is based on USB specifications and references implementations from both Linux and Windows environments. [Suggested solution] - Integrated a retry mechanism to sequentially execute enumeration scripts, inspired by the enumeration flows of Windows, Linux, and EDK2. This improves robustness when handling corner-case devices. - Do sanity check while the device report the device descriptor. - AMD XHCI might need to wait for more time while sending the CLEAR_FEATURE reuqest. Signed-off-by: Marlboro Chuang Signed-off-by: Jared Pan

MdeModulePkg: UsbNetwork: Fix uninitialized variable warnings

2026-06-24T14:49:50+00:00

In NetworkCommonDriverStart(), if gPxe is not NULL, TmpPxePointer should be initialized as it is referenced later in the clean up code. Signed-off-by: Tuan Phan

MdeModulePkg: Remove Depex section in UEFI_DRIVER and UEFI_APPLICATION

2026-06-09T05:51:07+00:00

According to INF specification, UEFI_DRIVER and UEFI_APPLICATION cannot have Depex section. So remove it. Signed-off-by: Qihang Gao

MdePkg,MdeModulePkg: Fix Spelling Errors in Atapi Definitions

2026-05-08T02:15:34+00:00

Fix spelling errors in definitions in Atapi.h. Update consumers in MdeModulePkg. Continuous-integration-options: PatchCheck.ignore-multi-package Signed-off-by: Oliver Smith-Denny