readme.txt

USb in User space, a kernel module that use usb layer

usu: USb in User space, a kernel module that use usb layer.
     Expose usb device as file without seek() and assuming as model 1-reader, many-writer 
     (more similar to pipe than file)

=== COMPILE ===
Open 'Makefile' and set variable 'LINUX_SRC' to place where kernel src was present, then:
make

=== CUSTOMIZE MODULE===
	(es usb bluetooth dongle)
	...
	static struct LinkT topol[]={
		{{0x00, 6}}, /* (OUTPUT, CONTROL). Never pass under our probe() because already created.*/
		{{0x81, 6}}, /* (INPUT, INTERRUPT) endpoint.*/
		{{0x02, 7}}, /* (OUTPUT, BULK) endpoint.*/
		{{0x82, 7}}, /* (INPUT, BULK) endpoint.*/
		{{0x03, 10}},/* (OUTPUT, ISOC) endpoint.*/
		{{0x83, 10}},/* (INPUT, ISOC) endpoint.*/
	};
	struct usb_device_id idta[] = {
		{USB_DEVICE(0x50d,0x012)}, /* Belkin.*/
		{USB_DEVICE(0xa12,0x001)}, /* Surecom.*/
		{USB_DEVICE(1131,1001)},   /* Sitel.*/
	/*	{USB_DEVICE(0xea0,0x2168)}, * UsbPen.*/
		{}
	};
	...

1) Fill 'topol[]' array with (endpointId, instanceId)
  - endpointId: is endpoint number that you found in /proc/bus/usb/devices.txt
  - instanceId: indentify instance that'll manage such endpoint.
		 0..9  : instance of class 'BuffRead'
		10..19 : instance of class 'DoubleBuff'

		'BuffRead'   class: can manage interrup, control, bulk I/O endpoint.
		'DoubleBuff' class: can manage isoc endpoint.
		
		Input endpoint are used during read()
		Output endpoint are used during write() 

2) Fill 'idta[]' array with idVendor, idProduct, see /proc/bus/usb/devices.txt

=== KNOWN PROBLEMS/COMMON MISTAKES ===
 - setting non standard usb interfaces require custom code. 
   TODO: Perhaps some option could be put in file name?