source: bootcd/isolinux/syslinux-6.03/gpxe/src/util/get-pci-ids

#! /usr/bin/perl -w

# get-pci-ids: extract pci vendor/device ids from linux net drivers

# Copyright (C) 2003 Georg Baum <gbaum@users.sf.net>

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


# Known bugs/limitations:
# - Does not recognize all drivers because some require special cflags.
#   Fails also on some drivers that do belong to other architectures
#   than the one of the machine this script is running on.
#   This is currently not so important because all drivers that have an
#   Etherboot counterpart are recognized.


use strict;
use File::Basename "dirname";
use POSIX "uname";

# Where to find the kernel sources
my $kernel_src = "/usr/src/linux";

if($#ARGV >= 0) {
        $kernel_src = shift;
}

# Sanity checks
if($#ARGV >= 0) {
        print STDERR "Too many arguments.\n";
        print STDERR "Usage: get-pci-ids [path to kernel sources]\n";
        print STDERR "       /usr/src/linux is assumed if no path is given.\n";
        exit 1;
}

unless(-f "$kernel_src/include/linux/version.h") {
        print STDERR "Could not find $kernel_src/include/linux/version.h.\n";
        print STDERR "$kernel_src is probably no Linux kernel source tree.\n";
        exit 1;
}

# Flags that are needed to preprocess the drivers.
# Some drivers need optimization
my $cflags="-D__KERNEL__ -I$kernel_src/include -I$kernel_src/net/inet -O2";

# The C preprocessor. It needs to spit out the preprocessed source on stdout.
my $cpp="gcc -E";

# List of drivers. We parse every .c file. It does not harm if it does not contain a driver.
my @drivers = split /\s+/, `find $kernel_src/drivers/net -name '*.c' | sort`;

# Kernel version
my $version = `grep UTS_RELEASE $kernel_src/include/linux/version.h`;
chomp $version;
$version =~ s/\s*#define\s+UTS_RELEASE\s+"(\S+)".*$/$1/g;

# Architecture
my @uname = uname();


# Print header
print "# PCI vendor/device ids extracted from Linux $version on $uname[4] at " . gmtime() . "\n";

my $driver;

# Process the drivers
foreach $driver (@drivers) {

        # Preprocess to expand macros
        my $command = "$cpp $cflags -I" . dirname($driver) . " $driver";
        open  DRIVER, "$command |" or die "Could not execute\n\"$command\".\n";

        # Extract the pci_device_id structure
        my $found = 0;
        my $line = "";
        my @lines;
        while(<DRIVER>) {
                if(/^\s*static\s+struct\s+pci_device_id/) {
                        # This file contains a driver. Print the name.
                        $driver =~ s!$kernel_src/drivers/net/!!g;
                        print "\n$driver\n";
                        $found = 1;
                        next;
                }
                if($found == 1){
                        if(/\};/ or /{\s*0\s*,?\s*}/) {
                                # End of struct
                                $found = 0;
                        } else {
                                chomp;
                                if(/\}\s*,?\s*\n?$/) {
                                        # This line contains a full entry or the last part of it.
                                        $_ = $line . $_;
                                        $line = "";
                                        s/[,\{\};\(\)]//g;      # Strip punctuation
                                        s/^\s+//g;              # Eat whitespace at beginning of line
                                        tr[A-Z][a-z];           # Convert to lowercase
                                        # Push the vendor and device id to @lines if this line is not empty.
                                        # We ignore everything else that might be there
                                        my ($vendor_id, $device_id, $remainder) = split /\W+/, $_, 3;
                                        push @lines, "$vendor_id $device_id\n" if($vendor_id && $device_id);
                                } else {
                                        # This line does contain a partial entry. Remember it.
                                        $line .= "$_ ";
                                }
                        }
                }
        }
        close DRIVER;           # No "or die", because $cpp fails on some files

        # Now print out the sorted values
        @lines = sort @lines;
        my $lastline = "";
        foreach(@lines) {
                # Print each vendor/device id combination only once.
                # Some drivers (e.g. e100) do contain subfamilies
                print if($_ ne $lastline);
                $lastline = $_;
        }
}