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Commit 9f38a920 authored by Andy Walls's avatar Andy Walls Committed by Mauro Carvalho Chehab
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V4L/DVB (12181): get_dvb_firmware: Add Yuan MPC718 MT352 DVB-T "firmware" extraction 



Add routine to support extracting the MT352 DVB-T demodulator initialization
sequence for Yuan MPC718 cards for use by the cx18 driver.

This routine uses a hueristic for extracting a good sequence.  It should work
on all different versions of the "yuanrap.sys" file, given the way the MT352
tuning sequences are stored in all versions of that file I have seen so far.
However, the current patch simply looks for one specific archive URL.

Signed-off-by: default avatarAndy Walls <awalls@radix.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 637fb3d7

Documentation/dvb/get_dvb_firmware

+51 −1
Original line number Diff line number Diff line
@@ -25,7 +25,7 @@ use IO::Handle; 
		"tda10046lifeview", "av7110", "dec2000t", "dec2540t",

		"dec3000s", "vp7041", "dibusb", "nxt2002", "nxt2004",

		"or51211", "or51132_qam", "or51132_vsb", "bluebird",

		"opera1", "cx231xx", "cx18", "cx23885", "pvrusb2" );

		"opera1", "cx231xx", "cx18", "cx23885", "pvrusb2", "mpc718" );



# Check args

syntax() if (scalar(@ARGV) != 1);
@@ -381,6 +381,56 @@ sub cx18 { 
    $allfiles;

}



sub mpc718 {

    my $archive = 'Yuan MPC718 TV Tuner Card 2.13.10.1016.zip';

    my $url = "ftp://ftp.work.acer-euro.com/desktop/aspire_idea510/vista/Drivers/$archive";

    my $fwfile = "dvb-cx18-mpc718-mt352.fw";

    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);



    checkstandard();

    wgetfile($archive, $url);

    unzip($archive, $tmpdir);



    my $sourcefile = "$tmpdir/Yuan MPC718 TV Tuner Card 2.13.10.1016/mpc718_32bit/yuanrap.sys";

    my $found = 0;



    open IN, '<', $sourcefile or die "Couldn't open $sourcefile to extract $fwfile data\n";

    binmode IN;

    open OUT, '>', $fwfile;

    binmode OUT;

    {

	# Block scope because we change the line terminator variable $/

	my $prevlen = 0;

	my $currlen;



	# Buried in the data segment are 3 runs of almost identical

	# register-value pairs that end in 0x5d 0x01 which is a "TUNER GO"

	# command for the MT352.

	# Pull out the middle run (because it's easy) of register-value

	# pairs to make the "firmware" file.



	local $/ = "\x5d\x01"; # MT352 "TUNER GO"



	while (<IN>) {

	    $currlen = length($_);

	    if ($prevlen == $currlen || $currlen <= 64) {

		chop; chop; # Get rid of "TUNER GO"

		s/^\0\0//;  # get rid of leading 00 00 if it's there

		printf OUT "$_";

		$found = 1;

		last;

	    }

	}

    }

    close OUT;

    close IN;

    if (!$found) {

	unlink $fwfile;

	die "Couldn't find valid register-value sequence in $sourcefile for $fwfile\n";

    }

    $fwfile;

}



sub cx23885 {

    my $url = "http://linuxtv.org/downloads/firmware/";