From 3595ac4979e648e102c7a500e3c63193a27953bc Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Sun, 22 Jun 2003 17:18:28 +0000
Subject: * Patch by Rune Torgersen, 4 Jun 2003:   add large memory support for
 MPC8266ADS board

* Patch by Richard Woodruff, 19 June 03:
  - Enabled standard u-boot device abstraction for ARM
  - Enabled console device for ARM
  - Initilized bi_baudrate for ARM

* Patch by Bill Hargen, 23 Apr 2003:
  fix byte order for 824x I2C addresses (write op)
---
 board/mpc8266ads/mpc8266ads.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'board/mpc8266ads/mpc8266ads.c')

diff --git a/board/mpc8266ads/mpc8266ads.c b/board/mpc8266ads/mpc8266ads.c
index 501e610d59..c6c8d761cb 100644
--- a/board/mpc8266ads/mpc8266ads.c
+++ b/board/mpc8266ads/mpc8266ads.c
@@ -46,7 +46,7 @@
  *   PSDMR_BUFCMD adds a clock
  *   0            no extra clock
  */
-#define CONFIG_PBI		0
+#define CONFIG_PBI		PSDMR_PBI
 #define PESSIMISTIC_SDRAM	0
 #define EAMUX			0	/* EST requires EAMUX */
 #define BUFCMD			0
@@ -379,6 +379,25 @@ long int initdram(int board_type)
 
 
     sdram_size = 1 << (rows + cols + banks + width);
+    /* hack for high density memory (512MB per CS) */
+    /* !!!!! Will ONLY work with Page Based Interleave !!!!!
+             ( PSDMR[PBI] = 1 ) 
+    */
+    /* mamory actually has 11 column addresses, but the memory controller 
+       doesn't really care. 
+       the calculations that follow will however move the rows so that 
+       they are muxed one bit off if you use 11 bit columns. 
+       The solution is to tell the memory controller the correct size of the memory
+       but change the number of columns to 10 afterwards.
+       The 11th column addre will still be mucxed correctly onto the bus.
+
+       Also be aware that the MPC8266ADS board Rev B has not connected 
+       Row addres 13 to anything.
+
+       The fix is to connect ADD16 (from U37-47) to SADDR12 (U28-126)
+    */
+    if (cols > 10)
+	    cols = 10;
 
 #if(CONFIG_PBI == 0)	/* bank-based interleaving */
     rowst = ((32 - 6) - (rows + cols + width)) * 2;
-- 
cgit