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Documentation: usb: EEM function testing 

Summary of how to test EEM function of USB gadget.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Andrzej Pietrasiewicz 2014-12-16 14:56:28 +01:00 committed by Felipe Balbi
parent 7bfbc6e3fb
commit 4ca560a6d3
1 changed files with 34 additions and 0 deletions
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34
Documentation/usb/gadget-testing.txt
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@ -4,6 +4,7 @@ provided by gadgets.
1. ACM function 1. ACM function
2. ECM function 2. ECM function
3. ECM subset function 3. ECM subset function
4. EEM function
1. ACM function 1. ACM function
@ -100,3 +101,36 @@ Configure IP addresses of the device and the host. Then:
On the device: ping <host's IP> On the device: ping <host's IP>
On the host: ping <device's IP> On the host: ping <device's IP>
4. EEM function
===============
The function is provided by usb_f_eem.ko module.
Function-specific configfs interface
------------------------------------
The function name to use when creating the function directory is "eem".
The EEM 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/eem.<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 EEM 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>