man pcitweak () - read/write PCI config space
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.
- -r PCI-ID
- Read the PCI configuration space register at offset for the PCI device at bus location 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.
- -w PCI-ID
- Write value to the PCI configuration space register at offset for the PCI device at bus location 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
AUTHORS
David Dawes (dawes@xfree86.org).