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authorMauro Carvalho Chehab <m.chehab@samsung.com>2014-07-25 22:42:42 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-07-25 22:49:04 -0300
commit55cc68eebcac0e138abaadb9c1a43e5eb59d4335 (patch)
treeda7ef56aa5e7adb9c3d50b36c6d3343315af3cbf
parent022117b431288cdecbcd3646d385b3a761e831b7 (diff)
parse_au0828.pl: Add a parser to help with au0828 debug
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 <m.chehab@samsung.com>
-rwxr-xr-xcontrib/au0828/parse_au0828.pl154
1 files changed, 154 insertions, 0 deletions
diff --git a/contrib/au0828/parse_au0828.pl b/contrib/au0828/parse_au0828.pl
new file mode 100755
index 00000000..37a127b5
--- /dev/null
+++ b/contrib/au0828/parse_au0828.pl
@@ -0,0 +1,154 @@
+#!/usr/bin/perl
+use strict;
+
+# Copyright (C) 2014 Mauro Carvalho Chehab <m.chehab@samsung.com>
+# 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);
+ }
+}

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