[PATCH] USB: add ldusb driver

The following driver provides complete interrupt-in and interrupt-out
reports (raw data) to a user program. Until now it uses the
HIDIOCGDEVINFO ioctl call, because I don't know better :-(. Perhaps, it
will be ok for you - and I will be happy, if you assign 8 minor numbers.

I have tested it in several environments and it works very well for me.
However, it has a problem with two or more devices at the same hub, if
the two or more devices need 1 ms interrupt-in transfers. Unfortunately
more than one interrupt-in transfer every ms isn't possible (ehci
driver?). This is why the min_interrupt_in_interval and
min_interrupt_out_interval are increased to 2 ms (see the corresponding
module parameters). This way, I can use two devices simultaneously at
the same hub.

Signed-off-by: Michael Hund <mhund@ld-didactic.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/Makefile

@@ -65,6 +65,7 @@ obj-$(CONFIG_USB_EMI26)		+= misc/
 obj-$(CONFIG_USB_EMI62)		+= misc/
 obj-$(CONFIG_USB_IDMOUSE)	+= misc/
 obj-$(CONFIG_USB_LCD)		+= misc/
+obj-$(CONFIG_USB_LD)		+= misc/
 obj-$(CONFIG_USB_LED)		+= misc/
 obj-$(CONFIG_USB_LEGOTOWER)	+= misc/
 obj-$(CONFIG_USB_RIO500)	+= misc/

drivers/usb/misc/Kconfig

@@ -139,6 +139,16 @@ config USB_IDMOUSE
 
 source "drivers/usb/misc/sisusbvga/Kconfig"
 
+config USB_LD
+	tristate "USB LD driver"
+	depends on USB && EXPERIMENTAL
+	help
+	  This driver is for generic USB devices that use interrupt transfers,
+	  like LD Didactic's USB devices.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ldusb.
+
 config USB_TEST
 	tristate "USB testing driver (DEVELOPMENT)"
 	depends on USB && USB_DEVICEFS && EXPERIMENTAL

drivers/usb/misc/Makefile

@@ -9,6 +9,7 @@ obj-$(CONFIG_USB_EMI26)		+= emi26.o
 obj-$(CONFIG_USB_EMI62)		+= emi62.o
 obj-$(CONFIG_USB_IDMOUSE)	+= idmouse.o
 obj-$(CONFIG_USB_LCD)		+= usblcd.o
+obj-$(CONFIG_USB_LD)		+= ldusb.o
 obj-$(CONFIG_USB_LED)		+= usbled.o
 obj-$(CONFIG_USB_LEGOTOWER)	+= legousbtower.o
 obj-$(CONFIG_USB_PHIDGETKIT)	+= phidgetkit.o