Changes between Version 9 and Version 10 of uboot

Timestamp:

12/01/2025 07:52:04 PM (4 days ago)

Author:

Tim Harvey

Comment:

added USB ethernet gadget instructions

uboot

@@ -704 +704 @@
 
 
+[=#ethgadget]
+==== USB Ethernet Gadget
+The USB ethernet gadget support allows you to use a USB connection to a host PC as an ethernet device and can be very handy if you are on a board that lacks an ethernet jack.
+
+For this support you must have the 'usb_ether' driver enabled (CONFIG_USB_ETHER) and use the bind command (CONFIG_CMD_BIND) to bind it to a USB host that supports dual-role. The binding of the driver requires you to know the device-tree path of the host.
+
+This is enabled on the Venice bootloaders and can be used as such on boards that have a dual role controller with a USB OTG or Type-C connector:
+ - IMX8MM boards (GW71xx/GW72xx/GW73xx/GW74xx):
+{{{#!bash
+bind /soc@0/bus@32c00000/usb@32e40000 usb_ether && setenv ethact usb@32e40000
+}}}
+ - IMX8MP boards (GW71xx/GW72xx/GW73xx/GW74xx):
+{{{#!bash
+bind /soc@0/usb@32f10100/usb@38100000 usb_ether && setenv ethact usb@38100000
+}}}
+
+After binding the driver a new network interface will be available (named per the dt path above):
+{{{#!bash
+setenv ipaddr 10.0.0.2
+setenv netmask 255.255.255.0
+ping 10.0.0.1
+}}}
+
+on a connected Linux host PC you will see usb0 enumerate and can do a 'sudo ifconfig usb0 10.0.0.1' at which point the ping will complete. Note that the USB device will not enumerate on the host PC until you use a network operation in U-Boot therefore you are likely best configuring your host PC for a static IP upon device recognition so the uboot operations do not time out while you are setting up your network with something like:
+{{{#!bash
+cat << EOF > /etc/udev/rules.d/70-usb-ethernet.rules
+SUBSYSTEM=="net", ACTION=="add", ATTR{idVendor}=="0525", ATTR{idProduct}=="a4a5", NAME="eth_usb"
+EOF
+udevadm control --reload-rules
+udevadm trigger
+cat << EOF >> /etc/network/interfaces
+auto eth1
+iface eth1 inet static
+   address 10.0.0.1
+   netmask 255.255.255.0
+EOF
+}}}
+
+
 [=#gadgetums]
 ==== USB Mass Storage (UMS) Gadget
@@ -714 +753 @@
  * expose mmc device 0 on USB host controller 0 as a USB Mass Storage device:
 {{{#!bash
-usb start && ums 0 mmc 0
+ums 0 mmc 0
 }}}