From b3464843dd559dfb33a5e1936cba6b854355cce9 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Tue, 7 Dec 2010 12:30:27 -0200
Subject: [PATCH] parse_sn9c201.pl: Add a parser for sn9c201 USB dumps

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
 contrib/sn9c201/parse_sn9c201.pl | 139 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100755 contrib/sn9c201/parse_sn9c201.pl

diff --git a/contrib/sn9c201/parse_sn9c201.pl b/contrib/sn9c201/parse_sn9c201.pl
new file mode 100755
index 0000000..b402433
--- /dev/null
+++ b/contrib/sn9c201/parse_sn9c201.pl
@@ -0,0 +1,139 @@
+#!/usr/bin/perl
+use strict;
+
+#   Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com>
+#
+#   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.
+#
+
+sub i2c_reg($)
+{
+	my %decode;
+	my $reg = shift;
+
+	$reg =~ s/\s+.*//;
+	$reg = hex("$reg");
+
+	if ($reg & 0x01) {
+		$decode{"speed"} = "400kbps";
+	} else {
+		$decode{"speed"} = "100kbps";
+	}
+	if ($reg & 0x02) {
+		$decode{"op"} = "RD";
+	} else {
+		$decode{"op"} = "WR";
+	}
+	$decode{"busy"} = "BUSY" if (($reg & 0x04) == 0);
+	$decode{"err"} = "ERR" if ($reg & 0x08);
+	$decode{"size"} = ($reg >> 4) & 7;
+	$decode{"i2c"} = "3wire" if (($reg & 0x80) == 0);
+
+	return %decode;
+}
+
+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;
+my $i2c_id;
+while (<>) {
+	tr/A-F/a-f/;
+	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 $reqtype = hex($1);
+		my $req = hex($2);
+		my $wvalue = hex("$4$3");
+		my $windex = hex("$6$5");
+		my $wlen = hex("$8$7");
+		my $payload = $9;
+		my $fullpayload = $9;
+
+		%i2c = i2c_reg($payload) if ($wvalue == 0x10c0);
+
+		if (($wvalue >= 0x10c0) && ($wvalue <= 0x10c2)) {
+			my $reg = $wvalue;
+			if ($reg == 0x10c0) {
+				$payload =~ s/^([0-9a-f].)//;
+				$payload =~ s/^\s+//;
+				$reg++;
+			}
+			if ($reg == 0x10c1 && $payload ne "") {
+				$i2c_id = $payload;
+				$i2c_id =~ s/\s+.*//;
+				$i2c_id = "addr=0x$i2c_id, ";
+				$payload =~ s/^([0-9a-f].)//;
+				$payload =~ s/^\s+//;
+				$reg++;
+			}
+
+#			my $data = $payload;
+#			$payload =~ 
+
+			my $s = sprintf "%s %s %s %s %s size=%d",
+				$i2c{"op"}, $i2c{"speed"}, $i2c{"busy"}, $i2c{"err"}, $i2c{"i2c"}, $i2c{"size"};
+			$s =~ s/\s+/ /g;
+
+			if ($reqtype & 0x80) {
+				printf "Read I2C: $s $i2c_id$payload\n";
+			} else {
+				printf "I2C $s $i2c_id$payload\n";
+			}
+			printf("\t%s, Req %3d, wValue: 0x%04x, wIndex 0x%04x, wlen %d: %s\n",
+				type_req($reqtype), $req, $wvalue, $windex, $wlen, $fullpayload);
+		} else {
+			printf("%s, Req %3d, wValue: 0x%04x, wIndex 0x%04x, wlen %d: %s\n",
+				type_req($reqtype), $req, $wvalue, $windex, $wlen, $payload);
+		}
+	}
+}
-- 
2.7.4