From 547161a803bb6de22ddb60e12f4e614d3fc86fd5 Mon Sep 17 00:00:00 2001
From: Jean Delvare <jdelvare@suse.de>
Date: Thu, 25 Oct 2012 11:55:53 +0000
Subject: [PATCH] decode-dimms: Print extra timing values for DDR memory
 modules as we do for DDR2 memory modules.

git-svn-id: http://lm-sensors.org/svn/i2c-tools/trunk@6078 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 CHANGES             |  1 +
 eeprom/decode-dimms | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index c1ba773..813dce9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,7 @@ SVN HEAD
                 Make side-by-side output more robust
                 Print module organization of DDR SDRAM
                 Merge cells by default in side-by-side output
+                Print extra timing values of DDR SDRAM
   i2cdetect: Do a best effort detection if functionality is missing
   i2c-dev.h: Minimize differences with kernel flavor
              Move SMBus helper functions to include/i2c/smbus.h
diff --git a/eeprom/decode-dimms b/eeprom/decode-dimms
index a85e602..1fc20cc 100755
--- a/eeprom/decode-dimms
+++ b/eeprom/decode-dimms
@@ -536,7 +536,12 @@ sub prints($) # print separator w/ given text
 
 # Helper functions
 
-sub tns($) # print a time in ns
+sub tns1($) # print a time in ns, with 1 decimal digit
+{
+	return sprintf("%.1f ns", $_[0]);
+}
+
+sub tns($) # print a time in ns, with 2 decimal digits
 {
 	return sprintf("%3.2f ns", $_[0]);
 }
@@ -944,8 +949,48 @@ sub decode_ddr_sdram($)
 
 	printl_cond(defined $cycle_time, "Minimum Cycle Time", $cycle_time);
 	printl_cond(defined $access_time, "Maximum Access Time", $access_time);
+	printl_cond($bytes->[43] & 0xfc,
+		    "Maximum Cycle Time (tCK max)",
+		    $bytes->[43] == 0xff ? "No minimum frequency" :
+		    $bytes->[43] == 0 ? "" : # Wouldn't be displayed, prevent div by 0
+		    tns1($bytes->[43]/4)." (DDR-".int(8000 / $bytes->[43]).")");
+
+
+# more timing information
+	prints("Timing Parameters");
+	printl_cond($bytes->[32] != 0xff,
+		    "Address/Command Setup Time Before Clock",
+		    tns(ddr2_sdram_atime($bytes->[32])));
+	printl_cond($bytes->[33] != 0xff,
+		    "Address/Command Hold Time After Clock",
+		    tns(ddr2_sdram_atime($bytes->[33])));
+	printl_cond($bytes->[34] != 0xff,
+		    "Data Input Setup Time Before Clock",
+		    tns(ddr2_sdram_atime($bytes->[34])));
+	printl_cond($bytes->[35] != 0xff,
+		    "Data Input Hold Time After Clock",
+		    tns(ddr2_sdram_atime($bytes->[35])));
+	printl("Minimum Row Precharge Delay (tRP)", tns($trp));
+	printl_cond($bytes->[28] & 0xfc,
+		    "Minimum Row Active to Row Active Delay (tRRD)",
+		    tns($bytes->[28]/4));
+	printl("Minimum RAS# to CAS# Delay (tRCD)", tns($trcd));
+	printl("Minimum RAS# Pulse Width (tRAS)", tns($tras));
+	printl_cond($bytes->[41] && $bytes->[41] != 0xff,
+		    "Minimum Active to Active/AR Time (tRC)",
+		    tns($bytes->[41]));
+	printl_cond($bytes->[42],
+		    "Minimum AR to Active/AR Command Period (tRFC)",
+		    tns($bytes->[42]));
+	printl_cond($bytes->[44],
+		    "Maximum DQS to DQ Skew (tDQSQ)",
+		    tns($bytes->[44]/100));
+	printl_cond(($bytes->[45] & 0xf0) && $bytes->[45] != 0xff,
+		    "Maximum Read Data Hold Skew (tQHS)",
+		    tns(ddr2_sdram_atime($bytes->[45])));
 
 # module attributes
+	prints("Module Attributes");
 	if (($bytes->[47] & 0x03) == 0x01) { $temp = "1.125\" to 1.25\""; }
 	elsif (($bytes->[47] & 0x03) == 0x02) { $temp = "1.7\""; }
 	else { $temp = "Other"; }