刚刚知道为什么EHCI debug只支持Net20DC和FT232H

代码:
    sudo ./attachment.sh  

    pcilib: sysfs_read_vpd: read failed: No such device   

    The following PCI devices support a USB debug port (says lspci): 0000:00:1a.0 0000:00:1d.0   

    The following PCI devices support a USB debug port (says the kernel): 0000:00:1a.0 0000:00:1d.0   

    PCI device 0000:00:1a.0 0000:00:1d.0, USB bus , USB physical port    

    Currently connected high-speed devices:   

    /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M   

    /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M   

        |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M   

    /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M   

        |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M   

            |__ Port 5: Dev 3, If 0, Class=Vendor Specific Class, Driver=ftdi_sio, 480M   

            |__ Port 5: Dev 3, If 1, Class=Vendor Specific Class, Driver=ftdi_sio, 480M   

            |__ Port 5: Dev 3, If 2, Class=Vendor Specific Class, Driver=ftdi_sio, 480M   

            |__ Port 5: Dev 3, If 3, Class=Vendor Specific Class, Driver=ftdi_sio, 480M   



    for usb_ctrl in **/sys/bus/pci/devices/\*/usb\***; do pci_path=$**{**usb_ctrl%/\***}**; iommu_group=$**(**readlink $pci_path/iommu_group**)**; echo "Bus $(cat $usb_ctrl/busnum) --> ${pci_path##\*/} (IOMMU group ${iommu_group##\*/})"; lsusb -s **${usb_ctrl#\*/usb}:**; echo; done   

    Bus 1 --> 0000:00:1a.0 (IOMMU group )   

    Bus 001 Device 003: ID 0403:6011 Future Technology Devices International, Ltd FT4232H Quad HS USB-UART/FIFO IC   

    Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub   

    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub   

     

    

    Bus 2 --> 0000:00:1d.0 (IOMMU group )   

    Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub   

    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub   

     

    

    Bus 3 --> 0000:00:14.0 (IOMMU group )   

    Bus 003 Device 002: ID 1bcf:0002 Sunplus Innovation Technology Inc. USB Optical Wheel Mouse   

    Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub   

     

    

    Bus 4 --> 0000:00:14.0 (IOMMU group )   

    Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub  

     

    

    CONFIG_USBDEBUG_HCD_INDEX=2

    CONFIG_CONSOLE_USB=y

    CONFIG_USBDEBUG=y

    CONFIG_USBDEBUG_DONGLE_FTDI_FT232H=y

    CONFIG_USBDEBUG_DONGLE_FTDI_FT232H_BAUD=115200