Add support for 256 MB SDRAM on CPU87

Patch by Josef Wagner, 25 Nov 2005

diff --git a/CHANGELOG b/CHANGELOG
index ee832bc..c4568a8 100644 (file)
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,9 @@
 Changes since U-Boot 1.1.4:
 ======================================================================
 
+* Add support for 256 MB SDRAM on CPU87
+  Patch by Josef Wagner, 25 Nov 2005
+
 * Add configuration for cam5200 board (based on TQM5200S).
 
 * More code cleanup

diff --git a/board/cpu87/cpu87.c b/board/cpu87/cpu87.c
index 8363d86..e8c2614 100644 (file)
--- a/board/cpu87/cpu87.c
+++ b/board/cpu87/cpu87.c
@@ -197,7 +197,7 @@ const iop_conf_t iop_conf_tab[4][32] = {
  */
 int checkboard (void)
 {
-       printf ("Board: CPU87 (Rev %02x)\n", CPU86_REV);
+       printf ("Board: CPU87 (Rev %02x)\n", CPU86_REV & 0x7f);
        return 0;
 }
 
@@ -280,7 +280,7 @@ long int initdram (int board_type)
        volatile memctl8260_t *memctl = &immap->im_memctl;
 
 #ifndef CFG_RAMBOOT
-       ulong size8, size9;
+       ulong size8, size9, size10;
 #endif
        long psize;
 
@@ -294,17 +294,25 @@ long int initdram (int board_type)
         */
        size8 = try_init (memctl, CFG_PSDMR_8COL, CFG_OR2_8COL,
                          (uchar *) CFG_SDRAM_BASE);
+       
        size9 = try_init (memctl, CFG_PSDMR_9COL, CFG_OR2_9COL,
                          (uchar *) CFG_SDRAM_BASE);
-
-       if (size8 < size9) {
-               psize = size9;
-               printf ("(60x:9COL) ");
-       } else {
+       
+       size10 = try_init (memctl, CFG_PSDMR_10COL, CFG_OR2_10COL,
+                         (uchar *) CFG_SDRAM_BASE);
+       
+       psize = max(size8,max(size9,size10));
+       
+       if (psize == size8) {
                psize = try_init (memctl, CFG_PSDMR_8COL, CFG_OR2_8COL,
                                  (uchar *) CFG_SDRAM_BASE);
                printf ("(60x:8COL) ");
-       }
+       } else if (psize == size9){
+               psize = try_init (memctl, CFG_PSDMR_9COL, CFG_OR2_9COL,
+                                 (uchar *) CFG_SDRAM_BASE);
+               printf ("(60x:9COL) ");
+       } else
+               printf ("(60x:10COL) ");
 
 #endif /* CFG_RAMBOOT */
 

diff --git a/include/configs/CPU87.h b/include/configs/CPU87.h
index 9a98e5c..7a1dada 100644 (file)
--- a/include/configs/CPU87.h
+++ b/include/configs/CPU87.h
@@ -455,7 +455,7 @@
 #define CFG_MIN_AM_MASK 0xC0000000
 
 /*
- * we use the same values for 32 MB and 128 MB SDRAM
+ * we use the same values for 32 MB, 128 MB and 256 MB SDRAM
  * refresh rate = 7.68 uS (100 MHz Bus Clock)
  */
 
@@ -510,6 +510,24 @@
                         PSDMR_WRC_1C                   |\
                         PSDMR_CL_2)
 
+       /* SDRAM initialization values for 10-column chips
+        */
+#define CFG_OR2_10COL  (CFG_MIN_AM_MASK                |\
+                        ORxS_BPD_4                     |\
+                        ORxS_ROWST_PBI1_A4             |\
+                        ORxS_NUMR_13)
+
+#define CFG_PSDMR_10COL        (PSDMR_PBI                      |\
+                        PSDMR_SDAM_A17_IS_A5           |\
+                        PSDMR_BSMA_A13_A15             |\
+                        PSDMR_SDA10_PBI1_A6            |\
+                        PSDMR_RFRC_7_CLK               |\
+                        PSDMR_PRETOACT_2W              |\
+                        PSDMR_ACTTORW_2W               |\
+                        PSDMR_LDOTOPRE_1C              |\
+                        PSDMR_WRC_1C                   |\
+                        PSDMR_CL_2)
+                        
 /*
  * Init Memory Controller:
  *
@@ -588,9 +606,9 @@
                         BRx_MS_SDRAM_P                 |\
                         BRx_V)
 
-#define CFG_OR2_PRELIM  CFG_OR2_9COL
+#define CFG_OR2_PRELIM  CFG_OR2_8COL
 
-#define CFG_PSDMR       CFG_PSDMR_9COL
+#define CFG_PSDMR       CFG_PSDMR_8COL
 #endif /* CFG_RAMBOOT */
 
 /* Bank 3 - Dual Ported SRAM