cat /sys/kernel/debug/usb/ohci/status # Show ED/TD lists echo 1 > /sys/module/ohci_hcd/parameters/debug # Enable verbose OHCI logging
Share your Hisilicon USB debugging experience below. This post assumes Linux kernel 3.10+ with OHCI support. For u-boot or RTOS drivers, the register-level programming model follows the OHCI specification but uses Hisilicon’s proprietary glue layer.
ohci_hcd: USB 1.0 Host Controller ohci_hcd: new USB bus registered, assigned bus number 1 ohci_hcd: irq 67, io mem 0x10120000 hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected If you see port status 0x0100 but no device—check pull-up resistors or Vbus.
