NAME
pcitweak - read/write PCI config space
SYNOPSIS
pcitweak
-l
pcitweak
-r
PCI-ID
[-b|-h]
offset
pcitweak
-w
PCI-ID
[-b|-h]
offset
value
DESCRIPTION
Pcitweak
is a utility that can be used to examine or change registers in the PCI
configuration space. On most platforms
pcitweak
can only be run by the root user.
OPTIONS
-l
Probe the PCI buses and print a line for each detected device. Each line
contains the bus location (bus:device:function), chip vendor/device, card
(subsystem) vendor/card, revision, class and header type. All values
printed are in hexadecimal.
I -r PCI-ID
Read the PCI configuration space register at
offset
for the PCI device at bus location
R PCI-ID .
PCI-ID
should be given in the form bus:device:function, with each value in
hexadecimal. By default, a 32-bit register is read.
I -w PCI-ID
Write
value
to the PCI configuration space register at
offset
for the PCI device at bus location
R PCI-ID .
PCI-ID
should be given in the form bus:device:function, with each value in
hexadecimal. By default, a 32-bit register is written.
-b
Read or write an 8-bit value (byte).
-h
Read or write a 16-bit value (halfword).
SEE ALSO
scanpci(1)
AUTHORS
David Dawes
(dawes@xfree86.org).
