How to Display USB Device Information (prtconf) (System Administration Guide: Devices and File Systems)

System Administration Guide: Devices and File Systems

How to Display USB Device Information (`prtconf`)

Use the prtconf command to display information about USB devices.

$ prtconf
        usb, instance #0
                 hub, instance #2
                     device, instance #8
                         interface (driver not attached)
                     printer (driver not attached)
                     mouse, instance #14
                     device, instance #9
                         keyboard, instance #15
                         mouse, instance #16
                     storage, instance #7
                         disk (driver not attached)
                     communications, instance #10
                         modem (driver not attached)
                         data (driver not attached)
                 storage, instance #0
                     disk (driver not attached)
                 storage, instance #1
                     disk (driver not attached)

You can use the prtconf command's -D option to display additional driver information. This information can be used to tell which ports and devices are being driven by the USBA 1.0 framework on SPARC systems, as displayed in the following example:

$ prtconf -D
.
.
.
SUNW,Sun-Blade-1500
.
.
.
1 pci, instance #0 (driver name: pcisch) 
           isa, instance #0 (driver name: ebus)
.
.
.
2 usb, instance #0 (driver name: ohci)
           usb, instance #1 (driver name: ohci)
.
.
.
3 pci, instance #0 (driver name: pci_pci)
4 usb, instance #0 (driver name: usba10_ohci)
            usb, instance #1 (driver name: usba10_ohci)
            usb, instance #0 (driver name: usba10_ehci)
                storage, instance #9 (driver name: usba10_scsa2usb)
                    disk, instance #9 (driver name: usb_sd)
            firewire, instance #0 (driver name: hci1394)
.
.
.

In the output above, note the following configuration characteristics:

PCI card ports are distinguished by the number of hierarchical pci nodes in the output above their usb nodes.

PCI card ports (4) fall under two hierarchical pci nodes 1 and 3 because they are driven through both the motherboard and the PCI card. Onboard ports (2) fall under a single PCI node (1) because they are one hardware architectural layer closer to the main system bus.
The name of a driver associated with a device node indicates which framework is directing the device and the port to which the device is attached. The drivers for all USB instances of (4) begin with usba10, indicating that the USBA 1.0 framework is managing those ports and the devices attached to them. Only those ports can support USB 2.0 devices at high speed.