Re: Adaptec USB2Xchange

From: Barry Bouwsma (freebsd-misuser_at_remove-NOSPAM-to-reply.NOSPAM.dyndns.dk)
Date: 01/04/05

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    Date: Tue, 4 Jan 2005 09:31:18 +0100 (CET)
To: Pete Carah <pete@altadena.net>

    Daniel O'Connor wrote:

    > > I have reason to use a USB to SCSI adapter under FBSD. I have a
    > > USB2Xchange from Adaptec, but (as usual for adaptec) it requires a firmware
    > > load, which appears harder in usb than in PCI. Does anyone know how to do

    > There is a USB firmware standard called DFU (Device Firmware Upgrade) which
    > quite a nunmber of devices use (eg Atmel WiFi, Ti USB Audio, etc).
    [...]

    > Unfortunatly it's hard to say if your device does DFU at all.. I would suggest
    > pulling it apart and trying to find data sheets on the chips in it.

    For anyone who doesn't thrill to the sound of plastic yielding a
    satisfying *SNAP*, I happen to have one of these (1989100) thanks
    to a friend, who also gave me a different device that works without
    a need for firmware load or anything -- though I have no SCSI
    devices to test, in case anyone is interested in things that Just
    Probably Work As-Is:
    umass0 at uhub3 port 1 configuration 1 interface 0
    umass0: Microtech International, Inc. USB-SCSI-HD50, rev 1.00/1.00, addr 6
    umass0: using SCSI over Bulk-Only
    scsibus0 at umass0: 2 targets, 1 lun per target
    probe(umass0:0:0:0): generic HBA error
    That's under NetBSD; FreeBSD looked comparable. It also required
    being snapped apart, because at first it didn't work at all, and I
    discovered two things: The power USB wire had come detached, and
    secondly, a SMD inductor was missing, so I have no idea how it ever
    passed quality control, nor do I want to know.

    Anyway, I'll not post a `usbgen' or `usbctl' from this device, as
    there's not much to see that's not already known, unless there's a
    call for it.

    Inside my device seems to be a Cypress Semiconductor chip, something
    like CY7xx8013-56PVC where the `xx' is hard to make out
          CYP 608578
    The mystery `xx' could be `C6'; or the first character could be `0' or
    perhaps `6'; the second character could be a `6' or `8' or maybe a
    `C' or `0' -- hard to tell as there's a thick blue marker line atop
    the chip, and my eyes aren't so good.

    The Cypress site disagrees with my excuse for a browser, and in order
    to obtain these numbers, I had to bend back a thin soldered metal
    plate, which, in addition to the above-mentioned snaps, could be
    off-putting for someone who cares about warranties. Perhaps this
    would be helpful for someone else.

    I did notice this mailing list post for Linux, if not yet known:
     http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg22138.html
    but I haven't looked into it.

    barry bouwsma

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