Hi, On Thu, Jan 17, 2002 at 01:09:01AM +0000, David Stevenson wrote: > 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"
The normal USB scanner driver now detects the gt-6816 chip? Or does this chip have more than one endpoint? > 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? Yes. You seem to have all these device files having the same major minor numbers (or maybe they are symlinks to the same device). > I have the start of a test program that opens /dev/usb/scanner0 and reads > the vendor and product numbers. By your own code or sanei/sanei_usb.c? > 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? I'm pretty sure that this is a kernel bug. Which kernel version? There was a bug in the scanner module that had similar problems if I remember correctly: http://www.jump.net/~dnelson/linux/usb/ . 0.4.7 fixed it for me. > Where is devrequest defined? As in > struct ctrlmsg_ioctl { > devrequest req; > void *data; > } cmsg; For SANE? In sanei_usb.c. You shouldn't need it in your code if I understood correctly. In the Linux kernel: linux/include/linux/usb.h . Howver, kernel headers shouldn't be included in user space. Bye, Henning
