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

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Date:	Tue, 7 Apr 2009 11:45:48 +0200
From:	Uwe Bonnes <bon@...ktron.ikp.physik.tu-darmstadt.de>
To:	Luotao Fu <l.fu@...gutronix.de>
Cc:	Uwe Bonnes <bon@...ktron.ikp.physik.tu-darmstadt.de>,
	gregkh@...e.de, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: serial: add FTDI FT4232H ID

>>>>> "Luotao" == Luotao Fu <l.fu@...gutronix.de> writes:

    Luotao> 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.

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

For libusb access, some work for the H-Type chips has already been don in
libftdi (www.intra2net.com/en/developer/libftdi/)

-- 
Uwe Bonnes                bon@...ktron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
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