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V4L/DVB (12181): get_dvb_firmware: Add Yuan MPC718 MT352 DVB-T "firmware" extraction

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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: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls 2009-07-03 11:33:17 -03:00 committed by Mauro Carvalho Chehab
parent 637fb3d70b
commit 9f38a920b2
1 changed files with 51 additions and 1 deletions
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52
Documentation/dvb/get_dvb_firmware
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@ -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/";