linux/drivers/usb
Tony Olech a5c66e4b24 USB: ftdi-elan: client driver for ELAN Uxxx adapters
This "ftdi-elan" module is one half of the "driver" for
ELAN's Uxxx series adapters which are USB to PCMCIA CardBus
adapters. Currently only the U132 adapter is available and
it's module is called "u132-hcd".

When the USB hot plug subsystem detects a Uxxx series adapter
it should load this module.

Upon a successful device probe() the jtag device file interface
is created and the status workqueue started up.

The jtag device file interface exists for the purpose of
updating the firmware in the Uxxx series adapter, but as
yet it had never been used.

The status workqueue initializes the Uxxx and then sits there
polling the Uxxx until a supported PCMCIA CardBus device is
detected it will start the command and respond workqueues
and then load the module that handles the device. This will
initially be only the u132-hcd module. The status workqueue
then just polls the Uxxx looking for card ejects.

The command and respond workqueues implement a command
sequencer for communicating with the firmware on the other
side of the FTDI chip in the Uxxx. This "ftdi-elan" module
exports some functions to interface with the sequencer.

Note that this module is a USB client driver.

Note that the "u132-hcd" module is a (cut-down OHCI)
host controller.

Thus we have a topology with the parent of a host controller
being a USB client! This really stresses the USB subsystem
semaphore/mutex handling in the module removal.

Signed-off-by: Tony Olech <tony.olech@elandigitalsystems.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27 11:58:59 -07:00
..
atm USB: fix __must_check warnings in drivers/usb/atm/ 2006-09-27 11:58:58 -07:00
class USB: fix __must_check warnings in drivers/usb/class/ 2006-09-27 11:58:58 -07:00
core USB: fix __must_check warnings in drivers/usb/core/ 2006-09-27 11:58:57 -07:00
gadget USB: net2280: update dma buffer allocation 2006-09-27 11:58:57 -07:00
host USB: fix __must_check warnings in drivers/usb/host/ 2006-09-27 11:58:58 -07:00
image USB: Make file operations structs in drivers/usb const. 2006-09-27 11:58:52 -07:00
input usb serial: support Alcor Micro Corp. USB 2.0 TO RS-232 through pl2303 driver 2006-09-27 11:58:59 -07:00
misc USB: ftdi-elan: client driver for ELAN Uxxx adapters 2006-09-27 11:58:59 -07:00
mon usbmon: don't call mon_dmapeek if DMA isn't being used 2006-09-27 11:58:56 -07:00
net USB: net1080 inherent pad length 2006-09-27 11:58:54 -07:00
serial usb serial: support Alcor Micro Corp. USB 2.0 TO RS-232 through pl2303 driver 2006-09-27 11:58:59 -07:00
storage USB: replace kernel_thread() with kthread_run() in libusual.c 2006-09-27 11:58:56 -07:00
Kconfig USB OHCI controller support for PNX4008 2006-09-27 11:58:48 -07:00
Makefile USB: ftdi-elan: client driver for ELAN Uxxx adapters 2006-09-27 11:58:59 -07:00
README Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
usb-skeleton.c usbcore: non-hub-specific uses of autosuspend 2006-09-27 11:58:57 -07:00

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.