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package Zaptel::Xpp;
#
# Written by Oron Peled <oron@actcom.co.il>
# Copyright (C) 2007, Xorcom
# This program is free software; you can redistribute and/or
# modify it under the same terms as Perl itself.
#
# $Id$
#
use strict;
use Zaptel::Xpp::Xbus;
=head1 NAME
Zaptel::Xpp - Perl interface to the Xorcom Astribank drivers.
=head1 SYNOPSIS
# Listing all Astribanks:
use Zaptel::Xpp;
# scans hardware:
my @xbuses = Zaptel::Xpp::xbuses("SORT_CONNECTOR");
for my $xbus (@xbuses) {
print $xbus->name." (".$xbus->label .", ". $xbus->connector .")\n";
for my $xpd ($xbus->xpds) {
print " - ".$xpd->fqn,"\n";
}
}
=cut
my $proc_base = "/proc/xpp";
# Nominal sorters for xbuses
sub by_name {
return $a->name cmp $b->name;
}
sub by_connector {
return $a->connector cmp $b->connector;
}
sub by_label {
my $cmp = $a->label cmp $b->label;
return $cmp if $cmp != 0;
return $a->connector cmp $b->connector;
}
=head1 xbuses([sort_order])
Scans system (/proc and /sys) and returns a list of Astribank (Xbus)
objects. The optional parameter sort_order is the order in which
the Astribanks will be returns:
=over
=item SORT_CONNECTOR
Sort by the connector string. For USB this defines the "path" to get to
the device through controllers, hubs etc.
=item SORT_LABEL
Sorts by the label of the Astribank. The label field is unique to the
Astribank. It can also be viewed through 'lsusb -v' without the drivers
loaded (the iSerial field in the Device Descriptor).
=item SORT_NAME
Sort by the "name". e.g: "XBUS-00". The order of Astribank names depends
on the load order, and hence may change between different runs.
=item custom function
Instead of using a predefined sorter, you can pass your own sorting
function. See the example sorters in the code of this module.
=back
=cut
sub xbuses {
my $optsort = shift || 'SORT_CONNECTOR';
my @xbuses;
-d "$proc_base" or return ();
my @lines;
local $/ = "\n";
open(F, "$proc_base/xbuses") ||
die "$0: Failed to open $proc_base/xbuses: $!\n";
@lines = <F>;
close F;
foreach my $line (@lines) {
chomp $line;
my ($name, @attr) = split(/\s+/, $line);
$name =~ s/://;
$name =~ /XBUS-(\d\d)/ or die "Bad XBUS number: $name";
my $num = $1;
@attr = map { split(/=/); } @attr;
my $xbus = Zaptel::Xpp::Xbus->new(NAME => $name, NUM => $num, @attr);
push(@xbuses, $xbus);
}
my $sorter;
if($optsort eq "SORT_CONNECTOR") {
$sorter = \&by_connector;
} elsif($optsort eq "SORT_NAME") {
$sorter = \&by_name;
} elsif($optsort eq "SORT_LABEL") {
$sorter = \&by_label;
} elsif(ref($optsort) eq 'CODE') {
$sorter = $optsort;
} else {
die "Unknown optional sorter '$optsort'";
}
@xbuses = sort $sorter @xbuses;
return @xbuses;
}
sub xpd_of_span($) {
my $span = shift or die "Missing span parameter";
return undef unless defined $span;
foreach my $xbus (Zaptel::Xpp::xbuses('SORT_CONNECTOR')) {
foreach my $xpd ($xbus->xpds()) {
return $xpd if $xpd->fqn eq $span->name;
}
}
return undef;
}
=head1 sync([new_sync_source])
Gets (and optionally sets) the internal Astribanks synchronization
source. When used to set sync source, returns the original sync source.
A synchronization source is a value valid writing into /proc/xpp/sync .
For more information read that file and see README.Astribank .
=cut
sub sync {
my $newsync = shift;
my $result;
my $newapi = 0;
my $file = "$proc_base/sync";
return '' unless -f $file;
# First query
open(F, "$file") or die "Failed to open $file for reading: $!";
while(<F>) {
chomp;
/SYNC=/ and $newapi = 1;
s/#.*//;
if(/\S/) { # First non-comment line
s/^SYNC=\D*// if $newapi;
$result = $_;
last;
}
}
close F;
if(defined($newsync)) { # Now change
$newsync =~ s/.*/\U$&/;
if($newsync =~ /^(\d+)$/) {
$newsync = ($newapi)? "SYNC=$1" : "$1 0";
} elsif($newsync ne 'ZAPTEL') {
die "Bad sync parameter '$newsync'";
}
open(F, ">$file") or die "Failed to open $file for writing: $!";
print F $newsync;
close(F) or die "Failed in closing $file: $!";
}
return $result;
}
=head1 SEE ALSO
=over
=item L<Zaptel::Xpp::Xbus>
Xbus (Astribank) object.
=item L<Zaptel::Xpp::Xpd>
XPD (the rough equivalent of a Zaptel span) object.
=item L<Zaptel::Xpp::Line>
Object for a line: an analog port or a time-slot in a adapter.
Equivalent of a channel in Zaptel.
=item L<Zaptel>
General documentation in the master package.
=back
=cut
1;
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