usb: gadget: usb_ether: Move the interfaces to Kconfig
We need to select an interface for the usb_ether gadget, and they haven't
been converted to Kconfig yet. Add a choice to make sure we have an option
selected, and convert all the users.
Reviewed-by: Łukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 6558d24..7a1ee74 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -133,6 +133,34 @@
if USB_ETHER
+choice
+ prompt "USB Ethernet Gadget Model"
+ default USB_ETH_RNDIS
+ help
+ There is several models (protocols) to implement Ethernet over USB
+ devices. The main ones are Microsoft's RNDIS and USB's CDC-Ethernet
+ (also called CDC-ECM). RNDIS is obviously compatible with Windows,
+ while CDC-ECM is not. Most other operating systems support both, so
+ if inter-operability is a concern, RNDIS is to be preferred.
+
+config USB_ETH_CDC
+ bool "CDC-ECM Protocol"
+ help
+ CDC (Communications Device Class) is the standard for Ethernet over
+ USB devices. While there's several alternatives, the most widely used
+ protocol is ECM (Ethernet Control Model). However, compatibility with
+ Windows is not that great.
+
+config USB_ETH_RNDIS
+ bool "RNDIS Protocol"
+ help
+ The RNDIS (Remote Network Driver Interface Specification) is a
+ Microsoft proprietary protocol to create an Ethernet device over USB.
+ Windows obviously supports it, as well as all the major operating
+ systems, so it's the best option for compatibility.
+
+endchoice
+
config USBNET_DEVADDR
string "USB Gadget Ethernet device mac address"
default "de:ad:be:ef:00:01"