Set SDelay register in the DDR controller for the MPC5200B chip.

board/icecube/icecube.c

@@ -27,6 +27,7 @@
 #include <common.h>
 #include <mpc5xxx.h>
 #include <pci.h>
+#include <asm/processor.h>
 
 #if defined(CONFIG_LITE5200B)
 #include "mt46v32m16.h"
@@ -89,6 +90,8 @@ long int initdram (int board_type)
 {
 	ulong dramsize = 0;
 	ulong dramsize2 = 0;
+	uint svr, pvr;
+
 #ifndef CFG_RAMBOOT
 	ulong test1, test2;
 
@@ -183,6 +186,24 @@ long int initdram (int board_type)
 
 #endif /* CFG_RAMBOOT */
 
+	/*
+	 * On MPC5200B we need to set the special configuration delay in the 
+	 * DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM 
+	 * Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
+	 *
+	 * "The SDelay should be written to a value of 0x00000004. It is 
+	 * required to account for changes caused by normal wafer processing 
+	 * parameters."
+	 */ 
+	svr = get_svr();
+	pvr = get_pvr();
+	if ((SVR_MJREV(svr) >= 2) && 
+	    (PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) {
+
+		*(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
+		__asm__ volatile ("sync");
+	}
+
 	return dramsize + dramsize2;
 }
 

cpu/mpc5xxx/cpu.c

@@ -38,7 +38,7 @@ int checkcpu (void)
 	ulong clock = gd->cpu_clk;
 	char buf[32];
 #ifndef CONFIG_MGT5100
-	uint svr;
+	uint svr, pvr;
 #endif
 
 	puts ("CPU:   ");
@@ -47,7 +47,8 @@ int checkcpu (void)
 	puts   (CPU_ID_STR);
 	printf (" (JTAG ID %08lx)", *(vu_long *)MPC5XXX_CDM_JTAGID);
 #else
-	svr = get_svr ();
+	svr = get_svr();
+	pvr = get_pvr();
 	switch (SVR_VER (svr)) {
 	case SVR_MPC5200:
 		printf ("MPC5200");
@@ -57,11 +58,10 @@ int checkcpu (void)
 		break;
 	}
 
-	printf (" v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr));
+	printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr), 
+		PVR_MAJ(pvr), PVR_MIN(pvr));
 #endif
-
 	printf (" at %s MHz\n", strmhz (buf, clock));
-
 	return 0;
 }
 

include/configs/IceCube.h

@@ -56,7 +56,9 @@
  * 0x40000000 - 0x4fffffff - PCI Memory
  * 0x50000000 - 0x50ffffff - PCI IO Space
  */
-#define CONFIG_PCI		1
+#define CONFIG_PCI
+
+#if defined(CONFIG_PCI)
 #define CONFIG_PCI_PNP		1
 #define CONFIG_PCI_SCAN_SHOW	1
 
@@ -67,6 +69,8 @@
 #define CONFIG_PCI_IO_BUS	0x50000000
 #define CONFIG_PCI_IO_PHYS	CONFIG_PCI_IO_BUS
 #define CONFIG_PCI_IO_SIZE	0x01000000
+#define ADD_PCI_CMD 		CFG_CMD_PCI
+#endif
 
 #define CFG_XLB_PIPELINING	1
 
@@ -76,8 +80,6 @@
 #define CFG_RX_ETH_BUFFER	8  /* use 8 rx buffer on eepro100  */
 #define CONFIG_NS8382X		1
 
-#define ADD_PCI_CMD 		CFG_CMD_PCI
-
 #else	/* MPC5100 */
 
 #define CONFIG_MII		1

include/mpc5xxx.h

@@ -131,6 +131,7 @@
 #if defined(CONFIG_MGT5100)
 #define MPC5XXX_SDRAM_XLBSEL	(MPC5XXX_SDRAM + 0x0010)
 #endif
+#define MPC5XXX_SDRAM_SDELAY	(MPC5XXX_SDRAM + 0x0090)
 
 /* Clock Distribution Module */
 #define MPC5XXX_CDM_JTAGID	(MPC5XXX_CDM + 0x0000)