* Temporarily disabled John Kerl's extended MII command code because

  "miivals.h" is missing

* Patches by Mark Jonas, 13 Apr 2004:
  - Remove CS0 chip select timing setting from cpu/mpc5xxx/start.S
  - Add sync instructions to IceCube SDRAM init code
  - Move SDRAM chip constants into seperate include files
  - Unify DDR and SDR initialization code
  - Unify all IceCube (Lite5xxx) target names

1 files changed, 148 insertions, 78 deletions

diff --git a/board/icecube/icecube.c b/board/icecube/icecube.c
index e40bcdf..5a206c0 100644
--- a/board/icecube/icecube.c
+++ b/board/icecube/icecube.c
@@ -2,6 +2,9 @@
  * (C) Copyright 2003
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
+ * (C) Copyright 2004
+ * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
+ *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
@@ -25,90 +28,84 @@
 #include <mpc5xxx.h>
 #include <pci.h>
 
+#if defined(CONFIG_MPC5200_DDR)
+#include "mt46v16m16-75.h"
+#else
+#include "mt48lc16m16a2-75.h"
+#endif
+
 #ifndef CFG_RAMBOOT
 static void sdram_start (int hi_addr)
 {
 	long hi_addr_bit = hi_addr ? 0x01000000 : 0;
 
-#ifdef CONFIG_MPC5200_DDR
 	/* unlock mode register */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xf05f0f00 | hi_addr_bit;
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit;
+	__asm__ volatile ("sync");
+	
 	/* precharge all banks */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xf05f0f02 | hi_addr_bit;
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
+	__asm__ volatile ("sync");
+
+#if SDRAM_DDR
 	/* set mode register: extended mode */
-	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x40090000;
+	*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_EMODE;
+	__asm__ volatile ("sync");
+
 	/* set mode register: reset DLL */
-	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x058d0000;
-	/* precharge all banks */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xf05f0f02 | hi_addr_bit;
-	/* auto refresh */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xf05f0f04 | hi_addr_bit;
-	/* set mode register */
-	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x018d0000;
-	/* normal operation */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x705f0f00 | hi_addr_bit;
-#else
-	/* unlock mode register */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0000 | hi_addr_bit;
-	/* precharge all banks */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002 | hi_addr_bit;
-	/* set mode register */
-#if defined(CONFIG_MPC5200)
-	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x00cd0000;
-#elif defined(CONFIG_MGT5100)
-	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
+	*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000;
+	__asm__ volatile ("sync");
 #endif
+
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
+	__asm__ volatile ("sync");
+
 	/* auto refresh */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0004 | hi_addr_bit;
-	/* auto refresh */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0004 | hi_addr_bit;
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit;
+	__asm__ volatile ("sync");
+
 	/* set mode register */
-	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x00cd0000;
+	*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
+	__asm__ volatile ("sync");
+	
 	/* normal operation */
-	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x504f0000 | hi_addr_bit;
-#endif
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
+	__asm__ volatile ("sync");
 }
 #endif
 
+/*
+ * ATTENTION: Although partially referenced initdram does NOT make real use
+ *            use of CFG_SDRAM_BASE. The code does not work if CFG_SDRAM_BASE
+ *            is something else than 0x00000000.
+ */
+
+#if defined(CONFIG_MPC5200)
 long int initdram (int board_type)
 {
 	ulong dramsize = 0;
-#ifdef CONFIG_MPC5200_DDR
 	ulong dramsize2 = 0;
-#endif
 #ifndef CFG_RAMBOOT
 	ulong test1, test2;
-
-	/* configure SDRAM start/end */
-#if defined(CONFIG_MPC5200)
+	
+	/* setup SDRAM chip selects */
 	*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e;/* 2G at 0x0 */
 	*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;/* disabled */
+	__asm__ volatile ("sync");
 
-#ifdef CONFIG_MPC5200_DDR
 	/* setup config registers */
-	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0x73722930;
-	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x47770000;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
+	__asm__ volatile ("sync");
 
-	/* set tap delay to 0x10 */
-	*(vu_long *)MPC5XXX_CDM_PORCFG = 0x10000000;
-#else
-	/* setup config registers */
-	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xd2322800;
-	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x8ad70000;
+#if SDRAM_DDR
+	/* set tap delay */
+	*(vu_long *)MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY;
+	__asm__ volatile ("sync");
 #endif
 
-#elif defined(CONFIG_MGT5100)
-	*(vu_long *)MPC5XXX_SDRAM_START = 0x00000000;
-	*(vu_long *)MPC5XXX_SDRAM_STOP = 0x0000ffff;/* 2G */
-	*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
-
-	/* setup config registers */
-	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2222600;
-	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
-
-	/* address select register */
-	*(vu_long *)MPC5XXX_SDRAM_XLBSEL = 0x03000000;
-#endif
+	/* find RAM size using SDRAM CS0 only */
 	sdram_start(0);
 	test1 = get_ram_size((ulong *)CFG_SDRAM_BASE, 0x80000000);
 	sdram_start(1);
@@ -119,11 +116,24 @@ long int initdram (int board_type)
 	} else {
 		dramsize = test2;
 	}
-#if defined(CONFIG_MPC5200)
-	*(vu_long *)MPC5XXX_SDRAM_CS0CFG =
-		(0x13 + __builtin_ffs(dramsize >> 20) - 1);
-#ifdef CONFIG_MPC5200_DDR
+
+	/* memory smaller than 1MB is impossible */
+	if (dramsize < (1 << 20)) {
+		dramsize = 0;
+	}
+	
+	/* set SDRAM CS0 size according to the amount of RAM found */
+	if (dramsize > 0) {
+		*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 + __builtin_ffs(dramsize >> 20) - 1;
+	} else {
+		*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
+	}
+
+	
+	/* let SDRAM CS1 start right after CS0 */
 	*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize + 0x0000001e;/* 2G */
+
+	/* find RAM size using SDRAM CS1 only */
 	sdram_start(0);
 	test1 = get_ram_size((ulong *)(CFG_SDRAM_BASE + dramsize), 0x80000000);
 	sdram_start(1);
@@ -134,34 +144,94 @@ long int initdram (int board_type)
 	} else {
 		dramsize2 = test2;
 	}
-	*(vu_long *)MPC5XXX_SDRAM_CS1CFG =
-		dramsize + (0x13 + __builtin_ffs(dramsize2 >> 20) - 1);
-#else
-	*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
-#endif
+	
+	/* memory smaller than 1MB is impossible */
+	if (dramsize2 < (1 << 20)) {
+		dramsize2 = 0;
+	}
+	
+	/* set SDRAM CS1 size according to the amount of RAM found */
+	if (dramsize2 > 0) {
+		*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize
+			| (0x13 + __builtin_ffs(dramsize2 >> 20) - 1);
+	} else {
+		*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
+	}
+
+#else /* CFG_RAMBOOT */
+
+	/* retrieve size of memory connected to SDRAM CS0 */
+	dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
+	if (dramsize >= 0x13) {
+		dramsize = (1 << (dramsize - 0x13)) << 20;
+	} else {
+		dramsize = 0;
+	}
+
+	/* retrieve size of memory connected to SDRAM CS1 */
+	dramsize2 = *(vu_long *)MPC5XXX_SDRAM_CS1CFG & 0xFF;
+	if (dramsize2 >= 0x13) {
+		dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
+	} else {
+		dramsize2 = 0;
+	}
+
+#endif /* CFG_RAMBOOT */
+
+	return dramsize + dramsize2;
+}
+
 #elif defined(CONFIG_MGT5100)
-	*(vu_long *)MPC5XXX_SDRAM_STOP = ((dramsize - 1) >> 15);
-#endif
 
-#else	/* CFG_RAMBOOT */
-#ifdef CONFIG_MGT5100
+long int initdram (int board_type)
+{
+	ulong dramsize = 0;
+#ifndef CFG_RAMBOOT
+	ulong test1, test2;
+	
+	/* setup and enable SDRAM chip selects */
+	*(vu_long *)MPC5XXX_SDRAM_START = 0x00000000;
+	*(vu_long *)MPC5XXX_SDRAM_STOP = 0x0000ffff;/* 2G */
 	*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
+	__asm__ volatile ("sync");
+
+	/* setup config registers */
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
+
+	/* address select register */
+	*(vu_long *)MPC5XXX_SDRAM_XLBSEL = SDRAM_ADDRSEL;
+	__asm__ volatile ("sync");
+
+	/* find RAM size */
+	sdram_start(0);
+	test1 = get_ram_size((ulong *)CFG_SDRAM_BASE, 0x80000000);
+	sdram_start(1);
+	test2 = get_ram_size((ulong *)CFG_SDRAM_BASE, 0x80000000);
+	if (test1 > test2) {
+		sdram_start(0);
+		dramsize = test1;
+	} else {
+		dramsize = test2;
+	}
+
+	/* set SDRAM end address according to size */
+	*(vu_long *)MPC5XXX_SDRAM_STOP = ((dramsize - 1) >> 15);
+	
+#else /* CFG_RAMBOOT */
+
+	/* Retrieve amount of SDRAM available */
 	dramsize = ((*(vu_long *)MPC5XXX_SDRAM_STOP + 1) << 15);
-#else
-	dramsize = ((1 << (*(vu_long *)MPC5XXX_SDRAM_CS0CFG - 0x13)) << 20);
-#ifdef CONFIG_MPC5200_DDR
-	dramsize2 = ((1 << (*(vu_long *)MPC5XXX_SDRAM_CS1CFG - 0x13)) << 20);
-#endif
-#endif
+
 #endif /* CFG_RAMBOOT */
 
-#ifdef CONFIG_MPC5200_DDR
-	dramsize += dramsize2;
-#endif
-	/* return total ram size */
 	return dramsize;
 }
 
+#else
+#error Neither CONFIG_MPC5200 or CONFIG_MGT5100 defined
+#endif
+
 int checkboard (void)
 {
 #if defined(CONFIG_MPC5200)