[bsdero]

Hi all, 

some years ago I attempted to write a real, serious USB kernel module for IRIX with support for UHCI and EHCI.  

It detects a lot of PCI cards. Also detects the number of USB ports, and UHCI/EHCI number of interfaces. I developed a test tool that helps to detect the functionality of the kernel modules. Also some scripts for load/unload the kernel modules. 

So we have 3 kernel modules: 
uhci driver, 
ehci driver and
usb_core. 

The idea was to write mouse, keyboard and other stuff communicating with usb_core, who would take care of the low-level usb communications with the PCI cards. 

Unfortunately I was unable to handle the low level setup required to establish communications with the PCI card. I did all kind of attempts to setup the DMA addresses in the PCI card, and it caused panics when a real USB transmition is attempted. I never could figure out what was happening and passed hour and hours reading and studying the IRIX drivers developers manuals and source code for others PCI drivers. 

Finally I found the sources after years. I dunno if somebody else is doing a real effort, but here is my code. I hope somebody find this useful.