0001 To understand all the Linux-USB framework, you'll use these resources:
0003 * This source code. This is necessarily an evolving work, and
0004 includes kerneldoc that should help you get a current overview.
0005 ("make pdfdocs", and then look at "usb.pdf" for host side and
0006 "gadget.pdf" for peripheral side.) Also, Documentation/usb has
0007 more information.
0009 * The USB 2.0 specification (from www.usb.org), with supplements
0010 such as those for USB OTG and the various device classes.
0011 The USB specification has a good overview chapter, and USB
0012 peripherals conform to the widely known "Chapter 9".
0014 * Chip specifications for USB controllers. Examples include
0015 host controllers (on PCs, servers, and more); peripheral
0016 controllers (in devices with Linux firmware, like printers or
0017 cell phones); and hard-wired peripherals like Ethernet adapters.
0019 * Specifications for other protocols implemented by USB peripheral
0020 functions. Some are vendor-specific; others are vendor-neutral
0021 but just standardized outside of the www.usb.org team.
0023 Here is a list of what each subdirectory here is, and what is contained in
0026 core/ - This is for the core USB host code, including the
0027 usbfs files and the hub class driver ("hub_wq").
0029 host/ - This is for USB host controller drivers. This
0030 includes UHCI, OHCI, EHCI, and others that might
0031 be used with more specialized "embedded" systems.
0033 gadget/ - This is for USB peripheral controller drivers and
0034 the various gadget drivers which talk to them.
0037 Individual USB driver directories. A new driver should be added to the
0038 first subdirectory in the list below that it fits into.
0040 image/ - This is for still image drivers, like scanners or
0041 digital cameras.
0042 ../input/ - This is for any driver that uses the input subsystem,
0043 like keyboard, mice, touchscreens, tablets, etc.
0044 ../media/ - This is for multimedia drivers, like video cameras,
0045 radios, and any other drivers that talk to the v4l
0047 ../net/ - This is for network drivers.
0048 serial/ - This is for USB to serial drivers.
0049 storage/ - This is for USB mass-storage drivers.
0050 class/ - This is for all USB device drivers that do not fit
0051 into any of the above categories, and work for a range
0052 of USB Class specified devices.
0053 misc/ - This is for all USB device drivers that do not fit
0054 into any of the above categories.