USB: add atmel_usba_udc driver

This is a driver for the Atmel USBA UDC which can be found integrated
on AT32AP700x AVR32 processors. For hardware documentation, please see
the AT32AP7000 data sheet:

http://www.atmel.com/dyn/resources/prod_documents/doc32003.pdf

This is a dual speed controller (connects at high or full speed).
The driver supports up to 7 control, bulk, interrupt and isochronous
endpoints with some constraints. Bulk, interrupt and isochronous
transfers are driven by DMA.

Signed-off-by: Haavard Skinnemoen <[email protected]>
Signed-off-by: David Brownell <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

MAINTAINERS

@@ -677,6 +677,13 @@ P:	Haavard Skinnemoen
 M:	[email protected]
 S:	Supported
 
+ATMEL USBA UDC DRIVER
+P:	Haavard Skinnemoen
+M:	[email protected]
+L:	[email protected]
+W:	http://avr32linux.org/twiki/bin/view/Main/AtmelUsbDeviceDriver
+S:	Supported
+
 ATMEL WIRELESS DRIVER
 P:	Simon Kelley
 M:	[email protected]

drivers/usb/gadget/Kconfig

@@ -67,6 +67,17 @@ config USB_GADGET_DEBUG_FILES
 	   driver on a new board.   Enable these files by choosing "Y"
 	   here.  If in doubt, or to conserve kernel memory, say "N".
 
+config USB_GADGET_DEBUG_FS
+	boolean "Debugging information files in debugfs"
+	depends on USB_GADGET && DEBUG_FS
+	help
+	   Some of the drivers in the "gadget" framework can expose
+	   debugging information in files under /sys/kernel/debug/.
+	   The information in these files may help when you're
+	   troubleshooting or bringing up a driver on a new board.
+	   Enable these files by choosing "Y" here.  If in doubt, or
+	   to conserve kernel memory, say "N".
+
 config	USB_GADGET_SELECTED
 	boolean
 
@@ -103,6 +114,20 @@ config USB_AMD5536UDC
 	default USB_GADGET
 	select USB_GADGET_SELECTED
 
+config USB_GADGET_ATMEL_USBA
+	boolean "Atmel USBA"
+	select USB_GADGET_DUALSPEED
+	depends on AVR32
+	help
+	  USBA is the integrated high-speed USB Device controller on
+	  the AT32AP700x processors from Atmel.
+
+config USB_ATMEL_USBA
+	tristate
+	depends on USB_GADGET_ATMEL_USBA
+	default USB_GADGET
+	select USB_GADGET_SELECTED
+
 config USB_GADGET_FSL_USB2
 	boolean "Freescale Highspeed USB DR Peripheral Controller"
 	depends on MPC834x || PPC_MPC831x
@@ -228,7 +253,6 @@ config USB_LH7A40X
 	default USB_GADGET
 	select USB_GADGET_SELECTED
 
-
 config USB_GADGET_OMAP
 	boolean "OMAP USB Device Controller"
 	depends on ARCH_OMAP

drivers/usb/gadget/Makefile

@@ -14,6 +14,7 @@ obj-$(CONFIG_USB_OMAP)		+= omap_udc.o
 obj-$(CONFIG_USB_LH7A40X)	+= lh7a40x_udc.o
 obj-$(CONFIG_USB_S3C2410)	+= s3c2410_udc.o
 obj-$(CONFIG_USB_AT91)		+= at91_udc.o
+obj-$(CONFIG_USB_ATMEL_USBA)	+= atmel_usba_udc.o
 obj-$(CONFIG_USB_FSL_USB2)	+= fsl_usb2_udc.o
 obj-$(CONFIG_USB_M66592)	+= m66592-udc.o