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pcitweak(1) [xfree86 man page]

PCITWEAK(1)						      General Commands Manual						       PCITWEAK(1)

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
scanpci(1) AUTHORS
David Dawes ( XFree86 Version 4.7.0 PCITWEAK(1)

Check Out this Related Man Page

SCANPCI(1)						      General Commands Manual							SCANPCI(1)

scanpci - scan/probe PCI buses SYNOPSIS
scanpci [-v12OfV] DESCRIPTION
Scanpci is a utility that can be used to scan PCI buses and report information about the configuration space settings for each PCI device. On most platforms, scanpci can only be run by the root user. OPTIONS
-v Print the configuration space information for each device in a verbose format. Without this option, only a brief description is printed for each device. -x Show hexadecimal dump of the first 64 bytes of each PCI device's configuration space. For CardBus bridges, the first 128 bytes are dumped instead. This option can be repeated to dump all 256 or 4096 bytes, but doing so might cause scanpci (or the system) to crash because some devices cannot tolerate reads of undefined portions of their configuration space. -1 Use PCI config type 1. -2 Use PCI config type 2. -f Used in conjunction with the above two options, this forces the specified configuration type to be used for config space access. -O Use the OS's PCI config space access mechanism to access the PCI config space (when available). -V n Set the verbosity level to n for the internal PCI scanner. This is primarily for debugging use. SEE ALSO
pcitweak(1) AUTHORS
XFree86 Version 4.7.0 SCANPCI(1)
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