How to Display USB Device Information (prtconf)

Use the prtconf command to display information about USB devices.

On a SPARC system, the prtconf output should look similar to the following:

$ 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)

On an x86 system, the PCI card number, made up of the vendor ID and device ID, is displayed instead of usb in the prtconf output. For example, pci1022,7460, instance #0, is displayed instead of usb, instance #0.

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, 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.