Date: Thu, 20 Oct 2005 13:04:28 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-hackers@freebsd.org, dr2867@pacbell.net Subject: Re: Accessing USB Mass Storage Device Message-ID: <20051020110428.GC31913@cicely12.cicely.de> In-Reply-To: <20051018.223845.67882192.imp@bsdimp.com> References: <43553287.4030907@pacbell.net> <20051018.223845.67882192.imp@bsdimp.com>
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On Tue, Oct 18, 2005 at 10:38:45PM -0600, M. Warner Losh wrote:
> In message: <43553287.4030907@pacbell.net>
> Daniel Rudy <dr2867@pacbell.net> writes:
> :
> : When the umass driver is compiled into the kernel, and one inserts a USB
> : mass storage device, how does one access the device descriptors (serial
> : number) while the device is listed as a da device? I would perfer to
> : have the OS do all the work of accessing the hardware.
>
> The serial number can be obtained with devifo. However, since cam
> doesn't hook into the device tree, mapping da number to umass number
> can be tricky in the arbitrary case.
>
> devinfo -v | grep umass
> umass0 pnpinfo vendor=0x054c product=0x014d devclass=0x00 devsubclass=0x00 release=0x0110 sernum="0052450548137984" intclass=0x08 intsubclass= at port=0 interface=0
This is the USB serial number, there might even exist another one
at CAM device layer.
e.g.:
[108]cicely13# camcontrol inquiry -n da -u 1
pass1: <General Flash Disk Drive 2.05> Removable Direct Access SCSI-2 device
pass1: Serial Number ST92163-2000
pass1: 1.000MB/s transfers
[110]cicely13# devinfo -v | grep umass0
umass0 pnpinfo vendor=0x0483 product=0x1307 devclass=0x00 devsubclass=0x00 sernum="4710765066451" interface=0 intclass=0x08 intsubclass=0x06 at port=1
--
B.Walter BWCT http://www.bwct.de
bernd@bwct.de info@bwct.de
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