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Subject: parse_au0828.pl: Add a parser to help with au0828 debug Author: Mauro Carvalho Chehab <[email protected]> Date: Fri Jul 25 22:42:42 2014 -0300 This parser is not 100%, but it properly handles the I2C registers, making easier to understand the parsed logic. Signed-off-by: Mauro Carvalho Chehab <[email protected]> contrib/au0828/parse_au0828.pl | 154 ++++++++++++++++++++++++++++++++++++++++ 1 files changed, 154 insertions(+), 0 deletions(-) --- http://git.linuxtv.org/v4l-utils.git?a=commitdiff;h=55cc68eebcac0e138abaadb9c1a43e5eb59d4335 diff --git a/contrib/au0828/parse_au0828.pl b/contrib/au0828/parse_au0828.pl new file mode 100755 index 0000000..37a127b --- /dev/null +++ b/contrib/au0828/parse_au0828.pl @@ -0,0 +1,154 @@ +#!/usr/bin/perl +use strict; + +# Copyright (C) 2014 Mauro Carvalho Chehab <[email protected]> +# Copyright (c) 2014 Samsung Electronics Co., Ltd. +# +# 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, version 2 of the License. +# +# 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. +# +# This small script parses USB dumps generated by several drivers, +# decoding USB bits. +# +# To use it, do: +# dmesg | ./parse_usb.pl +# +# Also, there are other utilities that produce similar outputs, and it +# is not hard to parse some USB analyzers log into the expected format. +# + +my %speed_map = ( + 0x07 => "250KHz", + 0x14 => "100KHz", + 0x40 => "30KHz", + 0x60 => "20KHz", +); + +sub type_req($) +{ + my $reqtype = shift; + my $s; + + if ($reqtype & 0x80) { + $s = "RD "; + } else { + $s = "WR "; + } + if (($reqtype & 0x60) == 0x20) { + $s .= "CLAS "; + } elsif (($reqtype & 0x60) == 0x40) { + $s .= "VEND "; + } elsif (($reqtype & 0x60) == 0x60) { + $s .= "RSVD "; + } + + if (($reqtype & 0x1f) == 0x00) { + $s .= "DEV "; + } elsif (($reqtype & 0x1f) == 0x01) { + $s .= "INT "; + } elsif (($reqtype & 0x1f) == 0x02) { + $s .= "EP "; + } elsif (($reqtype & 0x1f) == 0x03) { + $s .= "OTHER "; + } elsif (($reqtype & 0x1f) == 0x04) { + $s .= "PORT "; + } elsif (($reqtype & 0x1f) == 0x05) { + $s .= "RPIPE "; + } else { + $s .= sprintf "RECIP 0x%02x ", $reqtype & 0x1f; + } + + $s =~ s/\s+$//; + return $s; +} + +my $i2c_speed = "unknown"; +my $i2c_addr = "unknown"; +my @i2c_sbuf; +my @i2c_rbuf; +my $i2c_hold; + +while (<>) { + if (m/(.*)([0-9a-f].) ([0-9a-f].) ([0-9a-f].) ([0-9a-f].) ([0-9a-f].) ([0-9a-f].) ([0-9a-f].) ([0-9a-f].)[\<\>\s]+(.*)/) { + my $timestamp = $1; + my $reqtype = hex($2); + my $req = hex($3); + my $val = hex("$5$4"); + my $reg = hex("$7$6"); + my $wlen = hex("$9$8"); + my $payload = $10; + + $timestamp =~ s/^\s+//; + $timestamp =~ s/\s+$//; + + if (($reqtype == 0x40) && ($reg == 0x02ff)) { + # Start of an I2C tranfer + @i2c_sbuf = (); + @i2c_rbuf = (); + next; + } + if (($reqtype == 0x40) && ($reg == 0x0202)) { + # I2C speed + $i2c_speed = sprintf "0x%02x", $val; + $i2c_speed = $speed_map{$val} if defined($speed_map{$val}); + next; + } + + if (($reqtype == 0x40) && ($reg == 0x0203)) { + # I2C addr + $i2c_addr = $val >> 1; + next; + } + + if (($reqtype == 0x40) && ($reg == 0x0200)) { + # I2C trigger + $i2c_hold = ($val & 0x40) == 0x40; + + if (!$i2c_hold && ($val & 0x01)) { + printf "$timestamp au0828 I2C write addr = 0x%02x (speed = %s) ", $i2c_addr, $i2c_speed; + printf "0x%02x ", $_ foreach (@i2c_sbuf); + print "\n"; + + @i2c_sbuf = (); + } + + next; + } + + if (($reqtype == 0xc0) && ($reg == 0x0201)) { + # Wait to be ready + next; + } + + + if (($reqtype == 0x40) && ($reg == 0x0205)) { + # I2C write data + push @i2c_sbuf, $val; + + next; + } + + if (($reqtype == 0xc0) && ($reg == 0x0209)) { + # I2C read data + push @i2c_rbuf, $val; + + if (!$i2c_hold) { + printf "$timestamp au0828 I2C read addr = 0x%02x (speed = %s) ", $i2c_addr, $i2c_speed; + printf "0x%02x ", $_ foreach (@i2c_rbuf); + print "\n"; + + @i2c_rbuf = (); + } + next; + } + + printf("%s %s(0x%02x), Req 0x%02x, register 0x%04x, value 0x%04x, wlen %d: %s\n", + $timestamp, type_req($reqtype), $reqtype, $req, $reg, $val, $wlen, $payload); + } +} _______________________________________________ linuxtv-commits mailing list [email protected] http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
