[Bug 1001024] STM32 USB driver and proposed USB API change

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--- Comment #28 from John Dallaway <john@dallaway.org.uk> 2010-10-18 10:35:47 BST ---
Created an attachment (id=1002)
 --> (http://bugs.ecos.sourceware.org/attachment.cgi?id=1002)
usbs_serial-101018.patch

I have USB serial working on STM32 now. This provisional patch adds support for
the dynamic configuration of I/O endpoint structures to the USB serial function
driver in line with Chris Holgate's USB API change proposal.

I'm concerned that usbs_serial_start() will now block until a connection has
been established and endpoints have been configured. How will this affect the
implementation multiple function devices over a single USB port where multiple
usbs_*_start() functions may need to be called? I'm thinking that it should be
possible to present both a mass storage device and a serial device (for
example) over a single physical interface. While it's desirable to minimise
code changes, we should not restrict the capabilities of the USB slave support
in the process.

Chris, I would value your comments on the above.

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