| layout | title | date | categories | tags | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
post |
Gumstix USB OTG Gadget Drivers |
2014-08-12 21:09:00 -0700 |
gumstix duovero overo |
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All of the USB gadget drivers are built as modules.
The USB gadget driver for networking is g_ether.
Load it with modprobe
root@duovero:~# modprobe g_ether
[ 2602.003479] gadget: using random self ethernet address
[ 2602.009094] gadget: using random host ethernet address
[ 2602.015472] usb0: MAC 96:8d:b9:0a:2e:04
[ 2602.019561] usb0: HOST MAC 4e:db:41:65:e6:3a
[ 2602.024169] gadget: Ethernet Gadget, version: Memorial Day 2008
[ 2602.030578] gadget: g_ether ready
[ 2602.233703] musb-hdrc musb-hdrc: MUSB HDRC host driver
[ 2602.239532] musb-hdrc musb-hdrc: new USB bus registered, assigned bus number 3
[ 2602.247314] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
[ 2602.254455] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2602.262023] usb usb3: Product: MUSB HDRC host driver
[ 2602.267242] usb usb3: Manufacturer: Linux 3.6.11-jumpnow musb-hcd
[ 2602.273620] usb usb3: SerialNumber: musb-hdrc
[ 2602.279083] hub 3-0:1.0: USB hub found
[ 2602.283081] hub 3-0:1.0: 1 port detected
[ 2602.711151] gadget: high-speed config #1: CDC Ethernet (ECM)
Or put the following line in /etc/modules to have it load at boot.
g_ether
When the module is loaded you should see a usb0 network interface.
root@duovero:~# ifconfig usb0
usb0 Link encap:Ethernet HWaddr 96:8D:B9:0A:2E:04
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
You can give the interface an address manually
root@duovero:~# ifconfig usb0 192.168.20.2
root@duovero:~# ifconfig usb0
usb0 Link encap:Ethernet HWaddr 96:8D:B9:0A:2E:04
inet addr:192.168.20.2 Bcast:192.168.20.255 Mask:255.255.255.0
inet6 addr: fe80::948d:b9ff:fe0a:2e04/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Or you can add an entry to /etc/network/interfaces.
If you plug a USB cable from the Gumstix OTG port to a Linux workstation you should see something like the following
scott@octo:~$ tail -f /var/log/syslog
Aug 13 04:21:23 octo kernel: [ 2724.657061] usb 1-2: new high-speed USB device number 4 using ehci-pci
Aug 13 04:21:23 octo kernel: [ 2724.791895] usb 1-2: New USB device found, idVendor=0525, idProduct=a4a2
Aug 13 04:21:23 octo kernel: [ 2724.791899] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Aug 13 04:21:23 octo kernel: [ 2724.791901] usb 1-2: Product: RNDIS/Ethernet Gadget
Aug 13 04:21:23 octo kernel: [ 2724.791903] usb 1-2: Manufacturer: Linux 3.6.11-jumpnow with musb-hdrc
Aug 13 04:21:23 octo kernel: [ 2724.867155] cdc_ether 1-2:1.0 usb0: register 'cdc_ether' at usb-0000:00:12.2-2, CDC Ethernet Device, 4e:db:41:65:e6:3a
Aug 13 04:21:23 octo kernel: [ 2724.867182] usbcore: registered new interface driver cdc_ether
Aug 13 04:21:23 octo kernel: [ 2724.867282] usbcore: registered new interface driver cdc_subset
And you should see a new usb0 interface on the workstation
scott@octo:~$ ifconfig usb0
usb0 Link encap:Ethernet HWaddr 4e:db:41:65:e6:3a
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Assign it an IP address on the same subnet
scott@octo:~$ sudo ifconfig usb0 192.168.20.1
And you should have network connectivity between the two machines.
Here is a ping test from the Gumstix
root@duovero:~# ping 192.168.20.1
PING 192.168.20.1 (192.168.20.1): 56 data bytes
64 bytes from 192.168.20.1: seq=0 ttl=64 time=0.641 ms
64 bytes from 192.168.20.1: seq=1 ttl=64 time=0.641 ms
^C
--- 192.168.20.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 0.641/0.641/0.641 ms
And an ssh test from the workstation
scott@octo:~$ ssh [email protected]
Warning: Permanently added '192.168.20.2' (ECDSA) to the list of known hosts.
root@duovero:~#