u-boot/doc/README.usb

5  * SPDX-License-Identifier:	GPL-2.0+
11 The USB support is implemented on the base of the UHCI Host
15 flash sticks and USB network adaptors.
16 Tested with a TEAC Floppy TEAC FD-05PUB and Chicony KU-8933 Keyboard.
19 -------------
26 NOT automatically started during start-up. If someone needs the USB
31 started after the U-Boot is up and running. To boot an OS with a an
37 - usb start:
38 - usb reset:	    (re)starts the USB. All USB devices will be
40 - usb tree:	    shows all USB devices in a tree like display
41 - usb info [dev]:   shows all USB infos of the device dev, or of all
43 - usb stop [f]:	    stops the USB. If f==1 the USB will also stop if
47 - usb scan:	    scans the USB for storage devices.The USB must be
49 - usb device [dev]: show or set current USB storage device
50 - usb part [dev]:   print partition table of one or all USB storage
52 - usb read addr blk# cnt:
55 - usbboot addr dev:part:
59 ----------------
71 If you have a supported USB Ethernet adapter you can use it in U-Boot
72 to obtain an IP address and load a kernel from a network server.
76 and will appear as a network interface to an attached computer. In that
82 independent network device, able to connect and perform network operations
87 --------------
102 	{ 0x0b95, 0x7720 },	/* Trendnet TU2-ET100 V3.0R */
105 work. Try looking up the manufacturer of the chip inside your adapter.
106 or take the adapter apart and look for chip markings. Then add a line
108 build U-Boot and see if it works. If not then there might be differences
109 between the chip in your adapter and the driver. You could try to get a
110 datasheet for your device and add support for it to U-Boot. This is not
111 particularly difficult - you only need to provide support for four basic
116 ----------------------------
118 The normal U-Boot commands are used with USB networking, but you must
126 To enable USB Host Ethernet in U-Boot, your platform must of course
143 As with built-in networking, you will also want to enable some network
161 However note that encoding these individual network settings into a
195 Filename '/tftpboot/uImage-sjg-seaboard-261347'.
211 -------------
213 Most Ethernet dongles have a built-in MAC address which is unique in the
214 world. This is important so that devices on the network can be
218 Some boards have USB Ethernet chips on-board, and these sometimes do not
223 Built-in Ethernet adapters support setting the MAC address by means of
225 eth2addr). There is similar support on the USB network side, using the
227 don't want a USB device taking the MAC address of a built-in device or
230 So if your USB Ethernet chip doesn't have a MAC address available then