This document presents a Linux-USB 'Gadget'kernel modeAPI, for use within peripherals and other USB devicesthat embed Linux.It provides an overview of the API structure,and shows how that fits into a system development project.This is the first such API released on Linux to addressa number of important problems, including:
Linux File Cd Gadget Usb Device Driver Version: 802JFAj. Linux File Cd Gadget Usb Device now has a special edition for these Windows versions: Windows 7, Windows 7 64 bit, Windows 7 32 bit, Windows 10, Windows 10 64 bit, Windows 10 32 bit, Windows 8, Windows Vista Enterprise (Microsoft Windows NT 6.0.6000.0) 64bit. Using USB gadget configfs libusbg Demo. Linux USB Terminology USB host driver - The USB Host Controller. Linux USB Gadget History FunctionFS added in 2010 compositable version of gadgetfs now userspace gadget functions can be combined with kernel gadget functions in a composite gadget. Linux-USB Gadget API Framework. The drivers implementing and using that API combine to make a useful driver framework for Linux systems that implement USB peripherals. Many Linux systems will not be able to use it, since they only have PC-style USB Host (master) hardware in a PC, workstation, or server.
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Most Linux developers will not be able to use this API, since theyhave USB 'host' hardware in a PC, workstation, or server.Linux users with embedded systems are more likely tohave USB peripheral hardware.To distinguish drivers running inside such hardware from themore familiar Linux 'USB device drivers',which are host side proxies for the real USB devices,a different term is used:the drivers inside the peripherals are 'USB gadget drivers'.In USB protocol interactions, the device driver is the master(or 'client driver')and the gadget driver is the slave (or 'function driver').
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The gadget API resembles the host side Linux-USB API in that bothuse queues of request objects to package I/O buffers, and those requestsmay be submitted or canceled.They share common definitions for the standard USBChapter 9 messages, structures, and constants.Also, both APIs bind and unbind drivers to devices.The APIs differ in detail, since the host side's currentURB framework exposes a number of implementation detailsand assumptions that are inappropriate for a gadget API.While the model for control transfers and configurationmanagement is necessarily different (one side is a hardware-neutral master,the other is a hardware-aware slave), the endpoint I/0 API used hereshould also be usable for an overhead-reduced host side API.
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