1. 04 10月, 2006 1 次提交
  2. 28 9月, 2006 1 次提交
    • T
      USB: ftdi-elan: client driver for ELAN Uxxx adapters · a5c66e4b
      Tony Olech 提交于
      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: NTony Olech <tony.olech@elandigitalsystems.com>
      Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      
      a5c66e4b