IMX93 USB OTG VBUS Error

AlanWen — Thu, 04 Jul 2024 06:01:38 GMT

Hi,

I'm trying to configure my custom i.MX93 board to switch USB roles from host mode to peripheral. As the custom board setting, USB type-A is for host and a micro USB is for devcie (peripheral).

I'm currently running a custom Linux build based on imx-6.6.3 yocto project

As I modprobe the module g_mass_storage and setup the usb role from host to device, there are some error messages occurred.

root@imx93evk:~# echo host > /sys/bus/platform/devices/ci_hdrc.0/usb_role/ci_hdrc.0-role-switch/role [ 79.667113] ci_hdrc ci_hdrc.0: EHCI Host Controller root@imx93evk:~# [ 79.672827] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 2 [ 79.700263] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00 [ 79.706898] hub 2-0:1.0: USB hub found [ 79.713134] hub 2-0:1.0: 1 port detected root@imx93evk:~# lsusb Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub root@imx93evk:~# modprobe g_mass_storage file=/dev/mmcblk0 removable=1 [ 118.913030] Mass Storage Function, version: 2009/09/11 [ 118.918280] LUN: removable file: (no medium) [ 118.922669] LUN: removable file: /dev/mmcblk0 [ 118.927056] Number of LUNs=1 [ 118.930068] g_mass_storage gadget.0: Mass Storage Gadget, version: 2009/09/11 [ 118.937246] g_mass_storage gadget.0: userspace failed to provide iSerialNumber [ 118.944532] g_mass_storage gadget.0: g_mass_storage ready root@imx93evk:~# echo device > /sys/bus/platform/devices/ci_hdrc.0/usb_role/ci_hdrc.0-role-switch/role [ 126.608591] ci_hdrc ci_hdrc.0: remove, state 4 [ 126.613071] usb usb2: USB disconnect, device number 1 [ 126.620568] ci_hdrc ci_hdrc.0: USB bus 2 deregistered [ 126.626743] usbmisc_imx 4c100200.usbmisc: vbus is error root@imx93evk:~# [ 126.636382] usbmisc_imx 4c100200.usbmisc: Error occurs during detection: -22

Here is my kernel device tree setup:

&usbotg1 { dr_mode = "otg"; hnp-disable; srp-disable; adp-disable; usb-role-switch; role-switch-default-mode = "host"; disable-over-current; samsung,picophy-pre-emp-curr-control = <3>; samsung,picophy-dc-vol-level-adjust = <7>; status = "okay"; };

Can you help me figure out my issue ?

Sincerely.

Re: IMX93 USB OTG VBUS Error

Rita_Wang — Thu, 04 Jul 2024 08:52:03 GMT

How about your hardware design for the usb1 only support host or dual role?

Re: IMX93 USB OTG VBUS Error

AlanWen — Thu, 04 Jul 2024 09:00:22 GMT

A switch controled the USB data bus flow between USB type-A (host) and micro USB (device).

The USB_ID pin only passed through from i.MX93 to micro USB.

For the testing step, maybe I can try the peripheral mode first to connect the PC as device successfully.

Re: IMX93 USB OTG VBUS Error

Rita_Wang — Mon, 08 Jul 2024 04:21:40 GMT

Yes, you can try it. If still not work, let us know.

topic Re: IMX93 USB OTG VBUS Error in i.MX Processors

IMX93 USB OTG VBUS Error

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Re: IMX93 USB OTG VBUS Error