Documentation/usb/chipidea.rst

2 ChipIdea Highspeed Dual Role Controller Driver
6 -----------------------------------
12 -------------------------
29 	otg-rev = <0x0200>;
30 	adp-disable;
33 -------------------
35 1) Power up 2 Freescale i.MX6Q sabre SD boards with gadget class driver loaded
41    The A-device (with micro A plug inserted) should enumerate B-device.
43 3) Role switch
45    On B-device::
49    B-device should take host role and enumerate A-device.
51 4) A-device switch back to host.
53    On B-device::
57    or, by introducing HNP polling, B-Host can know when A-peripheral wishes to
58    be in the host role, so this role switch also can be triggered in
59    A-peripheral side by answering the polling from B-Host. This can be done on
60    A-device::
64    A-device should switch back to host and enumerate B-device.
66 5) Remove B-device (unplug micro B plug) and insert again in 10 seconds;
67    A-device should enumerate B-device again.
69 6) Remove B-device (unplug micro B plug) and insert again after 10 seconds;
70    A-device should NOT enumerate B-device.
72    if A-device wants to use bus:
74    On A-device::
79    if B-device wants to use bus:
81    On B-device::
85 7) A-device power down the bus.
87    On A-device::
91    A-device should disconnect with B-device and power down the bus.
93 8) B-device does data pulse for SRP.
95    On B-device::
99    A-device should resume usb bus and enumerate B-device.
102 ----------------------
103 "On-The-Go and Embedded Host Supplement to the USB Revision 2.0 Specification
107 --------------------------------------------
113 	echo enabled > /sys/bus/platform/devices/ci_hdrc.0/power/wakeup
117 	echo enabled > /sys/bus/platform/devices/2184000.usb/power/wakeup
121 	echo enabled > /sys/bus/platform/devices/20c9000.usbphy/power/wakeup
125 	echo enabled > /sys/bus/usb/devices/usb1/power/wakeup
129 	echo enabled > /sys/bus/usb/devices/1-1/power/wakeup
134 	for i in $(find /sys -name wakeup | grep usb);do echo enabled > $i;done;