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authorTony Olech <tony.olech@elandigitalsystems.com>2006-09-13 11:27:35 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-27 11:58:59 -0700
commitd774efeabccf5f5207aa70d5c126fc928e8b30bd (patch)
treeed06d0e280feb9f0aa89fbf4ef793dd5d48cebce /drivers/usb/core
parenta5c66e4b2418278786a025a5bd9625f485b2087a (diff)
USB: u132-hcd: host controller driver for ELAN U132 adapter
This "u132-hcd" module is one half of the "driver" for ELAN's U132 which is a USB to CardBus OHCI controller adapter. This module needs the "ftdi-elan" module in order to communicate to CardBus OHCI controller inserted into the U132 adapter. When the "ftdi-elan" module detects a supported CardBus OHCI controller in the U132 adapter it loads this "u132-hcd" module. Upon a successful device probe() the single workqueue is started up which does all the processing of commands from the USB core that implement the host controller. The workqueue maintains the urb queues and issues commands via the functions exported by the "ftdi-elan" module. Each such command will result in a callback. Note that the "ftdi-elan" module is a USB client driver. Note that this "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>
Diffstat (limited to 'drivers/usb/core')
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