path: root/Documentation/usb
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authorAndrzej Pietrasiewicz <andrzej.p@samsung.com>2014-12-16 13:56:38 (GMT)
committerFelipe Balbi <balbi@ti.com>2015-01-12 18:13:25 (GMT)
commit4dfcec8a2f9e22ac409ae512d5ff6acced8c588f (patch)
tree5d73ac12df9ff1255f54d37f379f6580e8cda23d /Documentation/usb
parentddb722449cfcfe30d3c3ed2cd404551e1c3c3670 (diff)
Documentation: usb: SERIAL function testing
Summary of how to test SERIAL 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')
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/usb/gadget-testing.txt b/Documentation/usb/gadget-testing.txt
index 61bc5f5..bc57c65 100644
--- a/Documentation/usb/gadget-testing.txt
+++ b/Documentation/usb/gadget-testing.txt
@@ -14,6 +14,7 @@ provided by gadgets.
11. OBEX function
12. PHONET function
13. RNDIS function
+14. SERIAL function
1. ACM function
@@ -529,3 +530,33 @@ Configure IP addresses of the device and the host. Then:
On the device: ping <host's IP>
On the host: ping <device's IP>
+14. SERIAL function
+The function is provided by usb_f_gser.ko module.
+Function-specific configfs interface
+The function name to use when creating the function directory is "gser".
+The SERIAL function provides just one attribute in its function directory:
+ port_num
+The attribute is read-only.
+There can be at most 4 ACM/generic serial/OBEX ports in the system.
+Testing the SERIAL function
+On host: insmod usbserial
+ echo VID PID >/sys/bus/usb-serial/drivers/generic/new_id
+On host: cat > /dev/ttyUSB<X>
+On target: cat /dev/ttyGS<Y>
+then the other way round
+On target: cat > /dev/ttyGS<Y>
+On host: cat /dev/ttyUSB<X>

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