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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@ -4,6 +4,7 @@ provided by gadgets.
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1. ACM function
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2. ECM function
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3. ECM subset function
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4. EEM function
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1. ACM function
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@ -100,3 +101,36 @@ Configure IP addresses of the device and the host. Then:
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On the device: ping <host's IP>
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On the host: ping <device's IP>
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4. EEM function
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===============
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The function is provided by usb_f_eem.ko module.
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Function-specific configfs interface
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------------------------------------
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The function name to use when creating the function directory is "eem".
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The EEM function provides these attributes in its function directory:
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ifname - network device interface name associated with this
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function instance
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qmult - queue length multiplier for high and super speed
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host_addr - MAC address of host's end of this
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Ethernet over USB link
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dev_addr - MAC address of device's end of this
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Ethernet over USB link
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and after creating the functions/eem.<instance name> they contain default
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values: qmult is 5, dev_addr and host_addr are randomly selected.
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Except for ifname they can be written to until the function is linked to a
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configuration. The ifname is read-only and contains the name of the interface
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which was assigned by the net core, e. g. usb0.
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Testing the EEM function
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------------------------
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Configure IP addresses of the device and the host. Then:
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On the device: ping <host's IP>
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On the host: ping <device's IP>
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