linux-kernel - Re: [PATCH] USB: serial: add FTDI FT4232H ID

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Date:	Tue, 7 Apr 2009 11:03:53 +0200
From:	Luotao Fu <l.fu@...gutronix.de>
To:	Uwe Bonnes <bon@...ktron.ikp.physik.tu-darmstadt.de>
Cc:	Luotao Fu <l.fu@...gutronix.de>, gregkh@...e.de,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: serial: add FTDI FT4232H ID

On Tue, Apr 07, 2009 at 10:30:52AM +0200, Uwe Bonnes wrote:
> >>>>> "Luotao" == Luotao Fu <l.fu@...gutronix.de> writes:
> 
>     Luotao> add the ID of FT4232H Hi-Speed quad channel serial converter.
> 
> This probably isn't enough to make the devices work.
> 
> The FT2232H and FT4432H are High Speed devices with defaul buffer sizes of
> 512 bytes. A recieve buffer contains two status bytes and then up to 510
> bytes of data against 62 bytes on the old devices.

Shame on me. I did only check whether the device with its four channels are
registered. Since the chip is built-in on our board and I still need some
additional libraries to check the devices connected to it. I haven't done any
function tests still. Will keep an eye on this. Sounds that it could be a little
hairy then. Afais the PID 6001 is e.g. shared by common/high speed devices. I
didn't grab deeper in the ftdi code, probably it'll be some way to work around
this.

cheers
Luotao Fu
-- 
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