USB: EHCI Debug Port Device Gadget
This is a patch that implements an USB EHCI Debug Device using the
Gadget API. This patch applies to a 2.6.35-rc3 kernel.
The gadget needs a compliant usb controller that forwards the
USB_DEVICE_DEBUG_MODE feature to its gadget.
The gadget provides two configuration modes, one that only printk() the
received data, and one that exposes a serial device to userland
(/dev/ttyGSxxx).
The gadget has been tested on an IGEPv2 board running a 2.6.35-rc1
kernel. The debug port was fed on the host side by a 2.6.34 kernel.
Signed-off-by: Stephane Duverger <stephane.duverger@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index dd3b251..cd27f9b 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -915,6 +915,34 @@
Say "y" to link the driver statically, or "m" to build a
dynamically linked module called "g_hid".
+config USB_G_DBGP
+ tristate "EHCI Debug Device Gadget"
+ help
+ This gadget emulates an EHCI Debug device. This is useful when you want
+ to interact with an EHCI Debug Port.
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "g_dbgp".
+
+if USB_G_DBGP
+choice
+ prompt "EHCI Debug Device mode"
+ default USB_G_DBGP_SERIAL
+
+config USB_G_DBGP_PRINTK
+ depends on USB_G_DBGP
+ bool "printk"
+ help
+ Directly printk() received data. No interaction.
+
+config USB_G_DBGP_SERIAL
+ depends on USB_G_DBGP
+ bool "serial"
+ help
+ Userland can interact using /dev/ttyGSxxx.
+endchoice
+endif
+
# put drivers that need isochronous transfer support (for audio
# or video class gadget drivers), or specific hardware, here.
config USB_G_WEBCAM