VID parser problem with usbdevs

[Hans Petter Selasky]

On Thursday 11 October 2007, Xiaofan Chen wrote:
> On 10/11/07, M. Warner Losh <imp at bsdimp.com> wrote:
> > In message:
> > : ===[mcuee] ~/Desktop/build/fsusb/fsusb-0.1.11-2 # sudo usbdevs -v
> > : Controller /dev/usb1:
> > : addr 126: full speed, power 100 mA, config 1, product 0x000b(0x000b),
> > : I-Tuner Networks(0x04d8), rev 0.00
> > : port 4 addr 126: full speed, power 100 mA, config 1, product
> > : 0x000b(0x000b), I-Tuner Networks(0x04d8), rev 0.00
> >
> > While 4d8 is for microchip technology, we get the name that we print
> > here directly from the usb device itself.
> > What makes you think that the vendor ID is parsed wrong?
>
> I have read the firmware source codes so I do not think there
> is anything called "I-Tuner" in the descriptors or anywhere in the
> firmware. 04d8/000b is the bootloader firmware VID/PID for
> Microchip PICDEM FS USB demo board.
>
> The following is the relevant descriptor.

Hi Xiaofan Chen,

When you compile any FreeBSD USB stack with "options USB_DEBUG", which might 
be hardcoded in the sources, then the kernel will search "usbdevs" for a 
vendor description. This will be done hence you have no valid strings for the 
manufacturer nor product :

>    0x00,                   // Manufacturer string index
>    0x00,                   // Product string index
>    0x00,                   // Device serial number string index

--HPS