usbdebug: Allow an USB hub on the debug dongle

Some development kits with USB 2.0 HS OTG have an USB hub instead
of being directly connected to the USB host/device controller.

Send the necessary initialisation sequence, using HUB CLASS requests
of PORT_POWER and PORT_RESET to enable a pre-selected port number
where a device supporting debug descriptor is located.

This also adds the Kconfig option for BeagleBone.

Change-Id: I7a5d0ba0962a9ca06bf3196232ed4a03bdfb2b06
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3925
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/console/Kconfig

@@ -173,10 +173,11 @@ config USBDEBUG
 
 	  If unsure, say N.
 
+if USBDEBUG
+
 config USBDEBUG_HCD_INDEX
 	int "Index for EHCI controller to use with usbdebug"
 	default 0
-	depends on USBDEBUG
 	help
 	   Some boards have multiple EHCI controllers with possibly only
 	   one having the Debug Port capability on an external USB port.
@@ -188,7 +189,6 @@ config USBDEBUG_HCD_INDEX
 config USBDEBUG_DEFAULT_PORT
 	int "Default USB port to use as Debug Port"
 	default 0
-	depends on USBDEBUG
 	help
 	  Selects which physical USB port usbdebug dongle is connected to.
 	  Setting of 0 means to scan possible ports starting from 1.
@@ -202,6 +202,27 @@ config USBDEBUG_DEFAULT_PORT
 	  your mainboard) is highly board-specific, and you'll likely
 	  have to find out by trial-and-error.
 
+choice
+	prompt "Type of dongle"
+	default USBDEBUG_DONGLE_STD
+
+config USBDEBUG_DONGLE_STD
+	bool "Net20DC or compatible"
+
+config USBDEBUG_DONGLE_BEAGLEBONE
+	bool "BeagleBone"
+	help
+	  Use this to configure the USB hub on BeagleBone board.
+
+endchoice
+
+config USBDEBUG_OPTIONAL_HUB_PORT
+	int
+	default 2 if USBDEBUG_DONGLE_BEAGLEBONE
+	default 0
+
+endif # USBDEBUG
+
 # TODO: Deps?
 # TODO: Improve description.
 config ONBOARD_VGA_IS_PRIMARY