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for STM32 USBPHYC PHY: USBPHYC device tree configurationД¤ How to use the framework 4.1 How to list USB devices.for STM32 OTG controller: OTG device tree configuration.

for STM32 USBH Host controller: USBH device tree configuration.

STMicroelectronics STM32 USB HS PHY Controller driverДetailed DT configurations for STM32 USB internal peripherals: Then to activate the STM32 USBPHYC driver, select: To activate the STM32 OTG driver, select:ДWC2 Mode Selection (Dual Role mode) -> Generic OHCI driver for a platform device Generic EHCI driver for a platform device To activate the STM32 USBH driver, select: Nevertheless, if a specific configuration is required, this section indicates how the USB framework can be activated/deactivated in the kernel.ДЄctivate USB support (CONFIG_USB=y) in the kernel configuration with the Linux Menuconfig tool: Menuconfig or how to configure kernel USB support, STM32 USBH driver and STM32 OTG driver are activated by default in ST deliveries. See USB kernel documentation for more details on API functions.ДЈ Configuration 3.1 Kernel configuration a PC) - B-Device is a power consumer and acts as a USB Peripheral (e.g. A-Device is a power supplier acting as a USB Host (e.g. STM32 OTG controller, depending on the USB connector which is used, can accept both A-Device and B-Device, while STM32 USBH Host controller only manages B-Device:

USB OTG specification defines two roles for USB devices: A-Device and B-Device.

USB controllers such as STM32 USBH internal peripheral and STM32 OTG internal peripheral, using an on-chip High-Speed UTMI+ PHY ( STM32 USBPHYC internal peripheral), or on-chip Full-Speed PHY for STM32 OTG internal peripheral. STM32 USBPHYC PHY provider is a PHY driver in the Generic PHY framework:

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USB controller drivers can rely on Generic PHY framework to manage the physical layer for USB data transmissions.

STM32 OTG uses kernel community driver (kernel space), based on the USB framework.

USB OTG controller drivers such as STM32 OTG USB OTG controllers in the USB Host-Side framework when they are used either in otg or host mode, and/or in the USB Gadget framework when they are used either in otg or peripheral mode.

Enhanced Host Controller Interface (EHCI) driver and Generic platform ehci driver - Open Host Controller Interface (OHCI) driver and Generic platform ohci driver STM32 USBH uses kernel community drivers (kernel space), based on the USB framework.

USB Host controller drivers such as STM32 USBH USB Host controllers in the USB Host-Side framework.

Gadget requires a peripheral controller and the gadget driver to use it.

Host-Side provides API interface to class drivers and forwards the request from class drivers to host controller driver.

USB framework ( Kernel space): composed of two parts, USB Host-Side and USB Gadget, which rely on the USB core with specific APIs to support USB host and devices controllers.

debugfs provides a debugging interface available through the user terminal. sysfs provides an information interface available through the user terminal. Gadget configfs provides configuration interface available through user terminal, used to configure USB Gadget. libusbg is a userland library that provides routines for creating and parsing USB gadget devices using the configfs API. One of the well-known utility is lsusb, used to display information about USB buses and the devices connected to them. usbutils is a set of USB utilities for collecting information about the USB devices that are connected to the USB host. libusb is a userland library that provides access to USB devices. USB Implementation architecture 2.1 Component description Linux can also be used as a device on the peripheral side, using gadget drivers. In this case various types of peripherals can be plugged in, such as:

gadget drivers and classes to be used within a peripheral.

host controllers and peripheral devices.

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The USB (universal serial bus) Linux В® framework supports many types of: 5.3.3 DWC2 driver debug messages and debugfs entry.5.3.1 Activating USB framework debug messages.5.2.2 How to trace using a protocol analyzer.5.1.2.2 USB Gadget monitoring with sysfs.5.1.2.1 USB buses monitoring with sysfs.4.3 How to configure USB Gadget through configfs.4.2 How to mount a USB key (mass-storage).