I am trying to find my way round to write a Bearpaw 1200TA driver. So here
are some queries that I am stuck on.
I am loading "modprobe scanner"
and sane-find-scanner then reports
sane-find-scanner: found USB scanner (vendor = 0x055f, product = 0x021e) at
device /dev/usb/scanner0
sane-find-scanner: found USB scanner (vendor = 0x055f, product = 0x021e) at
device /dev/usbscanner
sane-find-scanner: found USB scanner (vendor = 0x055f, product = 0x021e) at
device /dev/usbscanner0
Is it correct to find it 3 times?
I have the start of a test program that opens /dev/usb/scanner0 and reads the
vendor and product numbers. This works but after it has run once "lsmod" then
shows
Module Size Used by
scanner 7984 7
usb-uhci 21488 0 (unused)
Subsequent runs do not alter the used number, but I now cannot rmmod scanner
as it is 'in use'. Is there something obvious I have done wrong?
Where is devrequest defined? As in
struct ctrlmsg_ioctl {
devrequest req;
void *data;
} cmsg;
David
