firewire-phy-command - low-level FireWire bus and PHY configuration

       Report bugs to <"linux1394-devel@sourceforge.net">.
       "linux-firewire-utils"    home    page:   <"https://git.kernel.org/pub/scm/utils/ieee1394/linux-firewire-
       utils.git/">.

firewire-phy-command  is  a  utility  to  set low-level configuration parameters and to manage port power
       saving.

       In the following commands, numbers must be specified in decimal, or in hexadecimal with a "0x" prefix.

       node is either the device file (/dev/fw*) of the node that is to be accessed, or the node number.

       The following commands are available:

       firewire-phy-commandconfig [rootnode] [gapcountgapcount]
              The root parameter specifies the node that is forced to become the next root node.

              The gapcount parameter specifies a timing parameter used to optimize performance.   This  must  be
              derived from the actual worst-case round-trip delay between any two nodes.

              At least one of root or gapcount must be specified.

              The  configuration  changes take effect after the next bus reset, which must be issued immediately
              after this command; see the reset command below.

       firewire-phy-commandpingnode
              Send a ping packet to node node, and print node's answer (its self ID) together  with  the  round-
              trip time.

       firewire-phy-commandreadnode [pageport] register
              Read a PHY register on node node and print the register value.

              Registers 0 to 7 are global; registers 8 to 15 are paged and require both a page number and a port
              number.

       firewire-phy-commandnopnodeportfirewire-phy-commanddisablenodeportfirewire-phy-commandenablenodeportfirewire-phy-commandsuspendnodeportfirewire-phy-commandresumenodeportfirewire-phy-commandclearnodeport
              Send a remote command packet to port port of node node, and print the new port status.

              nop    Do  nothing, just return the status.  This can be used to read the port status, or to check
                     whether a port exists.

              disable
                     Disable the port and its connected peer port.  This  is  the  equivalent  of  breaking  the
                     connection between the port and the cable.

              enable Re-enable a disabled port.

              suspend
                     Suspend  the  connection  between  the  port and its peer port, and recursively suspend all
                     other active ports on the peer port's node.

              resume Resume the port and all other ports in the suspended domain.

              clear  Clear the port's fault status bit(s).  If a port entered the suspended state in  a  faulted
                     condition  because  its peer port did not suspend correctly, clearing the fault is required
                     after the resume to continue normal operation.

       firewire-phy-commandresume
              Broadcast a resume packet to all ports on the bus.

       firewire-phy-commandlinkonnode
              Send a link-on packet, which instructs node node to switch on, i.e., to come  out  of  powersaving
              mode.

       firewire-phy-commandreset
              Issue a bus reset.

       firewire-phy-command - low-level FireWire bus and PHY configuration

       This program needs to access all FireWire device files, which usually requires root privileges.

-b, --bus=node
              If  there  are  multiple  FireWire buses, i.e., if the computer has multiple FireWire controllers,
              this option specifies on which bus the command is sent.  node must  be  the  device  file  of  the
              controller, or the controller's card number.

              This option is not needed if a command's node parameter specifies a device node, as that parameter
              already implies the bus to use.

       -h, --help
              Print a summary of the command-line options and exit.

       -V, --version
              Print the version number of firewire-phy-command on the standard output and exit.

lsfirewirephy(8), firewire-request(8)

                                                   5 Jun 2011                            firewire-phy-command(8)

firewire-phy-command [options] command [parameters]