[OpenBIOS] r455 - dev/olpc/cafenand
svn at openbios.org
svn at openbios.org
Thu Jul 5 19:09:11 CEST 2007
Author: wmb
Date: 2007-07-05 19:09:11 +0200 (Thu, 05 Jul 2007)
New Revision: 455
Modified:
dev/olpc/cafenand/cafenand.fth
Log:
OLPC CaFe NAND driver - relaxed a couple of timings per Marvell's recommendation.
Modified: dev/olpc/cafenand/cafenand.fth
===================================================================
--- dev/olpc/cafenand/cafenand.fth 2007-07-05 17:07:58 UTC (rev 454)
+++ dev/olpc/cafenand/cafenand.fth 2007-07-05 17:09:11 UTC (rev 455)
@@ -47,7 +47,7 @@
\ The following timing values are calculated from the Hynix and Samsung
\ datasheets based on a clock cycle time of 10.4 nS.
h# 1010.0900 h# 24 cl! \ Timing1
- h# 1.0101 h# 28 cl! \ Timing2
+ h# 1.0102 h# 28 cl! \ Timing2 - recommended by Marvell
h# 1000.0000 h# 2c cl! \ Timing3
;
[ifdef] notdef
@@ -94,7 +94,7 @@
\ h# 90 4 1 >cmd constant read-id-cmd \ Not needed
h# 20.0070 1 0 >cmd constant read-status-cmd
h# 0420.0000 0 5 >cmd constant read-cmd
-h# 0220.0080 0 5 >cmd constant write-cmd
+h# 0220.0080 0 6 >cmd constant write-cmd \ The 6 adds a dummy address cycle to meet tADR for Hynix
: wait-mask ( bitmask -- )
begin dup h# 10 cl@ and until ( bitmask )
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