AM625: Please tell me whether AM62x has support USB OTG function?

Andrew Tan

Part Number: AM625

Device: AM625 GP

Installer: ti-processor-sdk-linux-am62xx-evm-09.00.00.03-Linux-x86-Install.bin — 6664936 K

SD card image: tisdk-debian-bookworm-am62xx-evm.wic.xz — 1955030 K

Our customer wants USB OTG function, I want to know if AM62x supports this function, please refer to the attached file page 20.

sprad21b.pdf

After reading the datasheet, I think AM62x does not support USB OTG function.

Please see the following forum, it seems that the USB ID pin is not needed.

It makes me think that AM62x has support USB OTG function.

AM625: To enable Peripheral/OTG mode from and test our custom board in device mode.

I've tried two settings and it's not being detected by the connected laptop.

&usb0 {
	dr_mode = "otg";
	status = "okay";
};

&usb0 {
	dr_mode = "peripheral";
	status = "okay";
};

And set it as host to work normally.

&usb0 {
	dr_mode = "host";
	status = "okay";
};

Thanks,

Andrew

over 1 year ago

0 Bin Liu over 1 year ago

TI__Guru*** 147126 points

Hi Andrew,

First of all, please review the following e2e thread to see if it solves your confusion of AM62x "OTG" support.

(+) AM625: Does AM62xx support USB OTG? - Processors forum - Processors - TI E2E support forums

When setting dr_mode to "otg" or "peripheral" in kernel device tree, please also run command 'modprobe g_serial" in AM62x linux console to load a USB gadget driver, then let me know if your PC can detect the connection.

0 Albert Wu over 1 year ago in reply to Bin Liu

Prodigy 235 points

Dear Bin ,

k3-am62x-sk-common.dtsi:

&usb0 {
dr_mode = "peripheral";
status = "okay";
};

Run modprobe g_serial after booting .

It Connect AM62x and PC with USB cable. It doesn't recognize AM62x's emmc and SD device in PC.

We use Windows File Explorer to confirm.

Please help fix this issue .

0 Bin Liu over 1 year ago in reply to Albert Wu

TI__Guru*** 147126 points

Hi Albert,

The command 'modprobe g_serial' is to expose AM62x to the PC as a serial port, not mass storage device for eMMC or SD card.

If you want the PC to see the eMMC or SD card from AM62x, please use the following command instead:

# modprobe g_mass_storage file=/dev/mmcblk<*>

The '<*>' in the command above is the eMMC or SD card partition name which you want the PC to see.