Hi Tim
On Thu, 2023-02-09 at 11:58 -0800, Tim Harvey wrote:
Greetings,
I'm finding that USB Mass Storage devices appear to fail detection on imx8mm when hanging off a USB hub whereas other devices such as USB ethernet work fine.
u-boot=> usb start && usb tree starting USB... Bus usb@32e40000: Bus usb@32e50000: USB EHCI 1.00 scanning bus usb@32e40000 for devices... 1 USB Device(s) found scanning bus usb@32e50000 for devices... cannot reset port 3!? 3 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found USB device tree: 1 Hub (480 Mb/s, 0mA) u-boot EHCI Host Controller
1 Hub (480 Mb/s, 0mA) | u-boot EHCI Host Controller | +-2 Hub (480 Mb/s, 0mA) | Microchip Tech USB2744 | +-3 Vendor specific (480 Mb/s, 0mA) Microchip Tech Hub Controller
Depending on the board and port sometimes I see the 'cannot reset port' issue calling out the port of the hub and sometimes I see a 'EHCI timed out on TD - token=0x80008c80 unable to get device descriptor (error=-1)' error.
I have several imx8m{m,n,p}-venice boards with onboard hubs I noticed this with but you can re-create this on an imx8mm-evk if you attach a HUB with a USB Mass Storage Device to the front-panel USB Type-C connector after manually enabling VBUS (due to the lack of a PTN5110 driver that would handle source/sink detection on that port): i2c dev 1 && i2c mw 0x50 0x23 0x77 1 # COMMAND: SRC_VBUS_HIGH usb start && usb tree
So far I've tried without success:
- setenv usb_pgood_delay 5000
- CONFIG_USB_ONBOARD_HUB=y
Any ideas on this?
Strange, I do not recall any such generic issue on our Verdin iMX8M Mini. This is with today's latest master built for verdin-imx8mm:
Verdin iMX8MM # usb start && usb tree starting USB... Bus usb@32e40000: Bus usb@32e50000: USB EHCI 1.00 scanning bus usb@32e40000 for devices... 1 USB Device(s) found scanning bus usb@32e50000 for devices... 5 USB Device(s) found scanning usb for storage devices... 1 Storage Device(s) found USB device tree: 1 Hub (480 Mb/s, 0mA) u-boot EHCI Host Controller
1 Hub (480 Mb/s, 0mA) | u-boot EHCI Host Controller | +-2 Hub (480 Mb/s, 0mA) | Microchip Tech USB2744 | +-3 Vendor specific (480 Mb/s, 0mA) | Microchip Tech Hub Controller | +-4 Human Interface (12 Mb/s, 98mA) | Logitech USB Receiver | +-5 Mass Storage (480 Mb/s, 100mA) General UDisk ?
The second USB port has a on-carrier USB hub both on Dahlia as well as the Verdin Development board.
Sorry, that I do not have any good suggestion other than maybe comparing with our configuration/design.
Best Regards,
Tim
Cheers
Marcel