WSL2-Linux-Kernel/drivers/usb
David Brownell a947522697 USB: "sparse" cleanups for usb gadgets
This removes complaints about the gadget stack which are generated by
the currrent "sparse":  it doesn't like the fact that zero is the null
pointer.  (Last I checked, C guarantees that's correct ...)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-30 13:27:47 -07:00
..
atm USB: atm: usbatm: clean up urb->status usage 2007-07-19 17:46:06 -07:00
class USB: class: usblp: clean up urb->status usage 2007-07-19 17:46:06 -07:00
core USB: Fix a bug in usb_start_wait_urb 2007-07-30 13:27:45 -07:00
gadget USB: "sparse" cleanups for usb gadgets 2007-07-30 13:27:47 -07:00
host Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6 2007-07-20 08:25:49 -07:00
image USB: image: microtek: clean up urb->status usage 2007-07-19 17:46:06 -07:00
misc Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight 2007-07-22 11:19:46 -07:00
mon mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
serial usb-serial: Fix edgeport regression on non-EPiC devices 2007-07-30 13:27:47 -07:00
storage USB: NIKON D50 is an unusual device 2007-07-30 13:27:46 -07:00
Kconfig no USB on M32R 2007-07-17 11:01:07 -07:00
Makefile USB: devices misc: Trivial patch to build the IOWARRIOR when it is selected in Kconfig 2007-07-30 13:27:43 -07:00
README Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
usb-skeleton.c USB: usb-skeleton: use anchors in pre/post reset 2007-07-12 16:34:37 -07:00

README

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("khubd").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
input/		- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
media/		- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.