Date: Thu, 16 Mar 2006 15:13:03 -0500 From: "Naram Qashat" <cyberbotx@cyberbotx.com> To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-usb@freebsd.org Subject: Re: IEEE1284 Device ID string for USB Printers Message-ID: <117601c64936$0817ffd0$fe02a8c0@metroid> References: <107401c6486b$773e9b10$fe02a8c0@metroid> <20060316.111031.106263180.imp@bsdimp.com>
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Well, I don't have a Linux machine to see exactly what is needed, but HPLIP's hpiod is looking for that IEEE1284 Device ID, which I believe starts off with MFG: or MANUFACTURER: followed by the maker of the product. HPLIP tries to get the device ID by using an IOCTL on the device, specifically, it's sending LPIOC_GET_DEVICE_ID(maxSize) [where maxSize is either the size sent to the function or 1024, whichever is smaller, and LPIOC_GET_DEVICE_ID is a macro that is set to _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len) with IOCNR_GET_DEVICE_ID #define'd to 1], and it passes a character pointer as a buffer. But FreeBSD doesn't let you do that on an u?lpt* device, and trying it on the root usb device doesn't get the information that is needed. I noticed in the ulpt.c source that the function ieee1284_print_id() is commented out with #if 0, and earlier in the file where it's called, it says that trying to retrieve the ID causes printing to stop working. I don't know enough about it to know why. I'm not sure if there is more needed by HPLIP to get the driver to work, but I've narrowed it down to this. Naram Qashat ----- Original Message ----- From: "M. Warner Losh" <imp@bsdimp.com> To: <cyberbotx@cyberbotx.com> Cc: <freebsd-usb@freebsd.org> Sent: Thursday, March 16, 2006 01:10 PM Subject: Re: IEEE1284 Device ID string for USB Printers > In message: <107401c6486b$773e9b10$fe02a8c0@metroid> > "Naram Qashat" <cyberbotx@cyberbotx.com> writes: > : I was wondering if there were any plans on getting the ieee1284_print_id() > : function in src/sys/dev/usb/ulpt.c to work properly. I was trying to see > : about getting HPLIP converted to FreeBSD, but it's hpiod program requires an > : ioctl to access the printer andget the IEEE1284 device ID string to identify > : the USB printer. Without that ioctl, HPLIP can't be ported over. > > What would it take to get working properly? > > Warnerhelp
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