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USB scanners do not have a common class specification, hence it is not possible to make a device driver that works for all scanners. Not withstanding this, Linux USB does have a generic scanner driver that provides the communication link between the device and user space.
The USB Scanner driver is capable of supporting just about any scanner. However meaningful output depends on the availability of a suitable user space tool, such as SANE, see http://www.mostang.com/sane.
If your scanner is not automatically associated with the scanner
driver, you have two options. The first option is to edit the source
code for the scanner driver - I assume that if you can do this, you
won't need any instructions. The second option is to use modules, and
to load the module with the vendor and product IDs specified as module
insmod scanner.o vendor=0xXXXX product=0xYYYY,
where XXXX is the hexadecimal vendor ID code, and YYYY is the
hexadecimal product ID code, which you can extract from the
you have the scanner plugged in.
mknod /dev/usb/scanner0 c 180 48 chmod a+rw /dev/usb/scanner0
To use the scanner device, you will need a suitable tool. SANE is strongly recommended. If you don't already have it installed or your installation is old, you will need to retrieve the package from the closest of the sites referenced at http://www.mostang.com/sane/source.html.
For instructions on building and installing SANE, refer to the various README files within the SANE distribution, and more detailed instructions for specific scanners that are provided later in this document.
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