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From: Hans Petter Selasky <hselasky@c2i.net>
To: "Pierre-Luc Drouin" <pldrouin@pldrouin.net>
Date: Tue, 22 Sep 2009 18:32:55 +0200
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Cc: ed@freebsd.org, freebsd-usb@freebsd.org
Subject: Re: usb/138659: uftdi driver broken in RELENG_8/CURRENT
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On Tuesday 22 September 2009 18:15:19 Pierre-Luc Drouin wrote:
> Hans Petter Selasky wrote:
> > On Tuesday 22 September 2009 17:21:28 Pierre-Luc Drouin wrote:
> >>>> Thanks!
> >>>
> >>> It indicates that your device is not sending any data.
> >>>
> >>> --HPS
> >>
> >> So does it mean that the write statement (a status request) is not
> >> transmitted to the device either?
> >
> > No, the "xxx_get()" message means that the data you write is sent and
> > transmitted.
> >
> > BTW: I have a FTDI adapter here, and it works fine with loopback when the
> > baudrate is set correctly.
> >
> >> Because this write statement should be
> >> followed by data sent from the device and it effectively does on Linux.
> >> And about SIGIO, shouldn't this signal be generated only when there is
> >> data available to read? Why is it generated in asynchronous mode and
> >> then the read statement returns EINTR?
> >
> > Ed has to answer these questions. This stuff is not handled in the USB
> > stack for FTDI devices.
> >
> > --HPS
>
> In the manual page for the uftdi driver, the chip I am using (FT232BL)
> is not listed. According to the FTDI website, it is based on FT8U232AM,
> but  it has extra functionalities. Have you had the chance to test an
> device that uses either a FT232BM, FT232BL or FT232BQ chip? I just
> tested the device on FreeBSD 7.2 and it does not work either...

No, I haven't.

--HPS