Changeset 5733

Timestamp:

06/09/09 13:13:41 (4 years ago)

Author:

khali

Message:

Decode voltage interface level of DDR SDRAM.

Location:

i2c-tools/trunk

Files:

• CHANGES (modified) (1 diff)
• eeprom/decode-dimms (modified) (4 diffs)

i2c-tools/trunk/CHANGES

@@ -12 +12 @@
                 Try harder to decode the manufacturing date
                 Handle read errors on sysfs
+                Decode voltage interface level of DDR SDRAM
   decode-xeon: Delete
   i2c-stub-from-dump: Use udev settle to speed up initialization

i2c-tools/trunk/eeprom/decode-dimms

@@ -511 +511 @@
 }
 
+# Common to SDR, DDR and DDR2 SDRAM
+sub sdram_voltage_interface_level($)
+{
+        my @levels = (
+                "TTL (5V tolerant)",            #  0
+                "LVTTL (not 5V tolerant)",      #  1
+                "HSTL 1.5V",                    #  2
+                "SSTL 3.3V",                    #  3
+                "SSTL 2.5V",                    #  4
+                "SSTL 1.8V",                    #  5
+        );
+        
+        return ($_[0] < @levels) ? $levels[$_[0]] : "Undefined!";
+}
+
 # Parameter: EEPROM bytes 0-127 (using 3-62)
 sub decode_sdr_sdram($)
@@ -579 +594 @@
         printl("Data Width", $temp);
 
-        if ($bytes->[8] == 0) { $temp = "5.0 Volt/TTL"; }
-        elsif ($bytes->[8] == 1) { $temp = "LVTTL"; }
-        elsif ($bytes->[8] == 2) { $temp = "HSTL 1.5"; }
-        elsif ($bytes->[8] == 3) { $temp = "SSTL 3.3"; }
-        elsif ($bytes->[8] == 4) { $temp = "SSTL 2.5"; }
-        elsif ($bytes->[8] == 255) { $temp = "New Table"; }
-        else { $temp = "Undefined!"; }
-        printl("Module Interface Signal Levels", $temp);
+        printl("Voltage Interface Level",
+               sdram_voltage_interface_level($bytes->[8]));
 
         if ($bytes->[11] == 0) { $temp = "No Parity"; }
@@ -810 +819 @@
         }
 
+        printl("Voltage Interface Level",
+               sdram_voltage_interface_level($bytes->[8]));
+
         my $highestCAS = 0;
         my %cas;
@@ -1002 +1014 @@
         printl("DRAM Package", $bytes->[5] & 0x10 ? "Stack" : "Planar");
 
-        my @volts = ("TTL (5V Tolerant)", "LVTTL", "HSTL 1.5V",
-                     "SSTL 3.3V", "SSTL 2.5V", "SSTL 1.8V", "TBD");
-        printl("Voltage Interface Level", $volts[$bytes->[8]]);
+        printl("Voltage Interface Level",
+               sdram_voltage_interface_level($bytes->[8]));
 
         printl("Refresh Rate", ddr2_refresh_rate($bytes->[12]));