powerpc/82xx: use SDRAM detection for mgcoge2ne

mgcoge2ne was an intermediate step towards mgcoge3ne. One difference is the
smaller SDRAM on mgcoge2ne (128MB). To support both boards with the same
u-boot we use here the SDRAM detection.

This patch enables SDRAM detection between 256MB and 128MB.
So in addition to the existing 256MB geometry:
     4 chips x 8M (13 rows, 10 cols) x 16 bit x 4 banks
we can now also have 128MB geometry:
     4 chips x 4M (13 rows,  9 cols) x 16 bit x 4 banks

Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com>

diff --git a/include/configs/km82xx.h b/include/configs/km82xx.h
index 9bfb8df..f046337 100644 (file)
--- a/include/configs/km82xx.h
+++ b/include/configs/km82xx.h
@@ -119,7 +119,8 @@
 
 /*
  * Bank 1 - 60x bus SDRAM
- * mgcoge3ne has 256M.
+ * mgcoge3ne has 256MB
+ * mgcoge2ne has 128MB
  */
 #define SDRAM_MAX_SIZE 0x10000000                      /* max. 256 MB  */
 #define CONFIG_SYS_GLOBAL_SDRAM_LIMIT  (512 << 20)     /* less than 512 MB */
@@ -127,20 +128,28 @@
 #define CONFIG_SYS_OR1 ((~(CONFIG_SYS_GLOBAL_SDRAM_LIMIT-1) & \
                           ORxS_SDAM_MSK)               |\
                        ORxS_BPD_4                      |\
-                       ORxS_ROWST_PBI1_A4              |\
                        ORxS_NUMR_13)
 
 #define CONFIG_SYS_PSDMR (                             \
                        PSDMR_PBI                       |\
-                       PSDMR_SDAM_A17_IS_A5            |\
                        PSDMR_BSMA_A13_A15              |\
-                       PSDMR_SDA10_PBI1_A6             |\
                        PSDMR_RFRC_5_CLK                |\
                        PSDMR_PRETOACT_2W               |\
                        PSDMR_ACTTORW_2W                |\
                        PSDMR_LDOTOPRE_1C               |\
                        PSDMR_WRC_2C                    |\
                        PSDMR_CL_2)
+
+#define CONFIG_SYS_SDRAM_LIST  {                                       \
+       {       .size   = 256 << 20,                                    \
+               .or1    = ORxS_ROWST_PBI1_A4,                           \
+               .psdmr  = PSDMR_SDAM_A17_IS_A5 | PSDMR_SDA10_PBI1_A6,   \
+       },                                                              \
+       {       .size   = 128 << 20,                                    \
+               .or1    = ORxS_ROWST_PBI1_A5,                           \
+               .psdmr  = PSDMR_SDAM_A16_IS_A5 | PSDMR_SDA10_PBI1_A7,   \
+       },                                                              \
+}
 #endif /* defined(CONFIG_MGCOGE3NE) */
 
 /* include further common stuff for all keymile 82xx boards */