How to change host to device or device to host

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

I find that tx2nx can change the host to deivce or device to host.
USB0 USB1 pin# 109 111 115 117

I mean I want to use usb0 and usb1 with device mode on tx2nx at the same time.

3

Hi,
This is not supported. Only one port can be enabled as OTG port. You would need to configure either usb0 or usb1.

4

Can XavierNx support this function?

5

It does not have any difference of this part in usb between tx2 and Xavier.

6

It seems to not work if I change USB1 with usb3.0 to otg.

xudc@3550000 {
		status = "okay";
		phys = <&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-1}>;
		phy-names = "usb2-1";
		nvidia,boost-cpu-freq = <1200>;
	};

	usb_cd {
		status = "disabled";
		phys = <&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-1}>;
		phy-names = "otg-phy";
		nvidia,xusb-padctl = <&xusb_padctl>;
	};

	xhci@3530000 {
		status = "okay";
		phys = <&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-0}>,
			<&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-1}>,
			<&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-2}>,
			<&{/xusb_padctl@3520000/pads/usb3/lanes/usb3-1}>;
		phy-names = "usb2-0", "usb2-1", "usb2-2", "usb3-1";
	};

	xusb_padctl@3520000 {
		status = "okay";

		pads {
			usb2 {
				lanes {
					usb2-0 {
						nvidia,function = "xusb";
						status = "okay";
					};
					usb2-1 {
						nvidia,function = "xusb";
						status = "okay";
					};
					usb2-2 {
						nvidia,function = "xusb";
						status = "okay";
					};
				};
			};
			usb3 {
				lanes {
					usb3-1 {
						nvidia,function = "xusb";
						status = "okay";
					};
				};
			};
		};

		ports {
			usb2-0 {
				status = "okay";
				mode = "host";
			};
			usb2-1 {
				status = "okay";
				mode = "otg";
			};
			usb2-2 {
				status = "okay";
				mode = "host";
			};
			usb3-1 {
				nvidia,usb2-companion = <1>;
				status = "okay";
			};
		};
7

OTG mode requires hardware to match so that it can work.

8

device mode is ok, how to fix my dts?

9

you can refer to the adaptation guide. Already mentioned there.

10

Can you show me the link?

11

https://developer.nvidia.com/embedded/jetson-linux-archive → l4t developer guide → search adaptation guide for TX2

12

The link seems to tell me how set usb2-0, but not usb2-1+usb3-1

14

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