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authorAndrzej Pietrasiewicz <andrzej.p@samsung.com>2014-12-16 13:56:26 (GMT)
committerFelipe Balbi <balbi@ti.com>2015-01-12 18:13:24 (GMT)
commitd5862ca6da545ec63ec2d2a8c687bf214c87e00e (patch)
tree5bdd92f7632814cb5aa90ec2f2743bd8dde0409c /Documentation/usb
parente38eb2c8cb435729579576b2b5bc5247ebcd6f5b (diff)
Documentation: usb: ECM function testing
Summary of how to test ECM function of USB gadget. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'Documentation/usb')
-rw-r--r--Documentation/usb/gadget-testing.txt34
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/usb/gadget-testing.txt b/Documentation/usb/gadget-testing.txt
index 2a448f8..7df8785 100644
--- a/Documentation/usb/gadget-testing.txt
+++ b/Documentation/usb/gadget-testing.txt
@@ -2,6 +2,7 @@ This file summarizes information on basic testing of USB functions
provided by gadgets.
1. ACM function
+2. ECM function
1. ACM function
@@ -32,3 +33,36 @@ then the other way round
On the device: cat > /dev/ttyGS<Y>
On the host: cat /dev/ttyACM<X>
+
+2. ECM function
+===============
+
+The function is provided by usb_f_ecm.ko module.
+
+Function-specific configfs interface
+------------------------------------
+
+The function name to use when creating the function directory is "ecm".
+The ECM function provides these attributes in its function directory:
+
+ ifname - network device interface name associated with this
+ function instance
+ qmult - queue length multiplier for high and super speed
+ host_addr - MAC address of host's end of this
+ Ethernet over USB link
+ dev_addr - MAC address of device's end of this
+ Ethernet over USB link
+
+and after creating the functions/ecm.<instance name> they contain default
+values: qmult is 5, dev_addr and host_addr are randomly selected.
+Except for ifname they can be written to until the function is linked to a
+configuration. The ifname is read-only and contains the name of the interface
+which was assigned by the net core, e. g. usb0.
+
+Testing the ECM function
+------------------------
+
+Configure IP addresses of the device and the host. Then:
+
+On the device: ping <host's IP>
+On the host: ping <device's IP>

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