ppc4xx: Change Kilauea to use the common DDR2 init function

This patch changes the kilauea and kilauea_nand (for NAND booting)
board port to not use a board specific DDR2 init routine anymore. Now
the common code from cpu/ppc4xx is used.

Thanks to Grant Erickson for all his basic work on this 405EX early
bootup.

Signed-off-by: Stefan Roese <sr@denx.de>

8 files changed, 29 insertions, 271 deletions

diff --git a/board/amcc/kilauea/Makefile b/board/amcc/kilauea/Makefile
index 39328c2..981ef3a 100644
--- a/board/amcc/kilauea/Makefile
+++ b/board/amcc/kilauea/Makefile
@@ -25,8 +25,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	= $(BOARD).o cmd_pll.o memory.o
-SOBJS	= init.o
+COBJS	= $(BOARD).o cmd_pll.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/board/amcc/kilauea/init.S b/board/amcc/kilauea/init.S
deleted file mode 100644
index bf47d6b..0000000
--- a/board/amcc/kilauea/init.S
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * Copyright (c) 2008 Nuovation System Designs, LLC
- *   Grant Erickson <gerickson@nuovations.com>
- *
- * (C) Copyright 2007-2008
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * Originally based on code provided from UDTech and AMCC
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <config.h>
-#include <ppc4xx.h>
-
-#include <ppc_asm.tmpl>
-#include <ppc_defs.h>
-
-#define mtsdram_as(reg, value)		\
-	addi	r4,0,reg	;	\
-	mtdcr	memcfga,r4	;	\
-	addis	r4,0,value@h	;	\
-	ori	r4,r4,value@l	;	\
-	mtdcr	memcfgd,r4	;
-
-#if defined(CONFIG_DDR_ECC)
-	.extern ecc_init
-#endif /* defined(CONFIG_DDR_ECC) */
-
-	.globl  ext_bus_cntlr_init
-ext_bus_cntlr_init:
-#if !defined(CFG_INIT_DCACHE_CS)
-#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
-
-	/*
-	 * DDR2 SDRAM Controller Setup
-	 */
-
-	/* Set Memory Bank Configuration Registers */
-	mtsdram_as(SDRAM_MB0CF, CFG_SDRAM0_MB0CF);
-	mtsdram_as(SDRAM_MB1CF, CFG_SDRAM0_MB1CF);
-	mtsdram_as(SDRAM_MB2CF, CFG_SDRAM0_MB2CF);
-	mtsdram_as(SDRAM_MB3CF, CFG_SDRAM0_MB3CF);
-
-	/* Set Memory Clock Timing Register */
-	mtsdram_as(SDRAM_CLKTR, CFG_SDRAM0_CLKTR);
-
-	/* Set Refresh Time Register */
-	mtsdram_as(SDRAM_RTR, CFG_SDRAM0_RTR);
-
-	/* Set SDRAM Timing Registers */
-	mtsdram_as(SDRAM_SDTR1, CFG_SDRAM0_SDTR1);
-	mtsdram_as(SDRAM_SDTR2, CFG_SDRAM0_SDTR2);
-	mtsdram_as(SDRAM_SDTR3, CFG_SDRAM0_SDTR3);
-
-	/* Set Mode and Extended Mode Registers */
-	mtsdram_as(SDRAM_MMODE, CFG_SDRAM0_MMODE);
-	mtsdram_as(SDRAM_MEMODE, CFG_SDRAM0_MEMODE);
-
-	/* Set Memory Controller Options 1 Register */
-	mtsdram_as(SDRAM_MCOPT1, CFG_SDRAM0_MCOPT1);
-
-	/* Set Manual Initialization Control Registers */
-	mtsdram_as(SDRAM_INITPLR0, CFG_SDRAM0_INITPLR0);
-	mtsdram_as(SDRAM_INITPLR1, CFG_SDRAM0_INITPLR1);
-	mtsdram_as(SDRAM_INITPLR2, CFG_SDRAM0_INITPLR2);
-	mtsdram_as(SDRAM_INITPLR3, CFG_SDRAM0_INITPLR3);
-	mtsdram_as(SDRAM_INITPLR4, CFG_SDRAM0_INITPLR4);
-	mtsdram_as(SDRAM_INITPLR5, CFG_SDRAM0_INITPLR5);
-	mtsdram_as(SDRAM_INITPLR6, CFG_SDRAM0_INITPLR6);
-	mtsdram_as(SDRAM_INITPLR7, CFG_SDRAM0_INITPLR7);
-	mtsdram_as(SDRAM_INITPLR8, CFG_SDRAM0_INITPLR8);
-	mtsdram_as(SDRAM_INITPLR9, CFG_SDRAM0_INITPLR9);
-	mtsdram_as(SDRAM_INITPLR10, CFG_SDRAM0_INITPLR10);
-	mtsdram_as(SDRAM_INITPLR11, CFG_SDRAM0_INITPLR11);
-	mtsdram_as(SDRAM_INITPLR12, CFG_SDRAM0_INITPLR12);
-	mtsdram_as(SDRAM_INITPLR13, CFG_SDRAM0_INITPLR13);
-	mtsdram_as(SDRAM_INITPLR14, CFG_SDRAM0_INITPLR14);
-	mtsdram_as(SDRAM_INITPLR15, CFG_SDRAM0_INITPLR15);
-
-	/* Set On-Die Termination Registers */
-	mtsdram_as(SDRAM_CODT, CFG_SDRAM0_CODT);
-	mtsdram_as(SDRAM_MODT0, CFG_SDRAM0_MODT0);
-	mtsdram_as(SDRAM_MODT1, CFG_SDRAM0_MODT1);
-
-	/* Set Write Timing Register */
-	mtsdram_as(SDRAM_WRDTR, CFG_SDRAM0_WRDTR);
-
-	/*
-	 * Start Initialization by SDRAM0_MCOPT2[SREN] = 0 and
-	 * SDRAM0_MCOPT2[IPTR] = 1
-	 */
-	mtsdram_as(SDRAM_MCOPT2, SDRAM_MCOPT2_SREN_EXIT | \
-				 SDRAM_MCOPT2_IPTR_EXECUTE);
-
-	/*
-	 * Poll SDRAM0_MCSTAT[MIC] for assertion to indicate the
-	 * completion of initialization.
-	 *
-	 *   do {
-	 *           mfsdram(SDRAM_MCSTAT, val);
-	 *   } while ((val & SDRAM_MCSTAT_MIC_MASK) != SDRAM_MCSTAT_MIC_COMP);
-	 */
-	li	r4,SDRAM_MCSTAT
-	lis	r2,SDRAM_MCSTAT_MIC_COMP@h
-	ori	r2,r2,SDRAM_MCSTAT_MIC_COMP@l
-0:	mtdcr	memcfga,r4
-	mfdcr	r3,memcfgd
-	clrrwi	r3,r3,31
-	cmpw	cr7,r3,r2
-	bne+	cr7,0b
-
-	/* Set Delay Control Registers */
-	mtsdram_as(SDRAM_DLCR, CFG_SDRAM0_DLCR);
-	mtsdram_as(SDRAM_RDCC, CFG_SDRAM0_RDCC);
-	mtsdram_as(SDRAM_RQDC, CFG_SDRAM0_RQDC);
-	mtsdram_as(SDRAM_RFDC, CFG_SDRAM0_RFDC);
-
-	/*
-	 * Enable Controller by SDRAM0_MCOPT2[DCEN] = 1:
-	 *
-	 *   mcopt2 = mfsdram(SDRAM_MCOPT2);
-	 */
-	li	r4,SDRAM_MCOPT2
-	mtdcr	memcfga,r4
-	mfdcr	r3,memcfgd
-
-	/*
-	 *   mtsdram(SDRAM_MCOPT2, mcopt2 | SDRAM_MCOPT2_DCEN_ENABLE);
-	 */
-	mtdcr	memcfga,r4
-	oris	r3,r3,SDRAM_MCOPT2_DCEN_ENABLE@h
-	ori	r3,r3,SDRAM_MCOPT2_DCEN_ENABLE@l
-	mtdcr	memcfgd,r3
-
-#if defined(CONFIG_DDR_ECC)
-	/*
-	 *   ecc_init(CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20);
-	 */
-	mflr	r13
-	lis	r3,CFG_SDRAM_BASE@h
-	ori	r3,r3,CFG_SDRAM_BASE@l
-	lis	r4,(CFG_MBYTES_SDRAM << 20)@h
-	ori	r4,r4,(CFG_MBYTES_SDRAM << 20)@l
-	bl	ecc_init
-	mtlr	r13
-#endif /* defined(CONFIG_DDR_ECC) */
-#endif /* !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL) */
-#endif /* !defined(CFG_INIT_DCACHE_CS) */
-
-	blr
diff --git a/board/amcc/kilauea/memory.c b/board/amcc/kilauea/memory.c
deleted file mode 100644
index b7e2344..0000000
--- a/board/amcc/kilauea/memory.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright (c) 2008 Nuovation System Designs, LLC
- *   Grant Erickson <gerickson@nuovations.com>
- *
- * (C) Copyright 2007
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <asm/processor.h>
-#include <i2c.h>
-
-void sdram_init(void)
-{
-	return;
-}
-
-#if defined(CONFIG_NAND_U_BOOT)
-long int initdram(int board_type)
-{
-	return (CFG_MBYTES_SDRAM << 20);
-}
-#endif /* defined(CONFIG_NAND_U_BOOT) */
-
-#if defined(CFG_DRAM_TEST)
-int testdram (void)
-{
-    printf ("testdram\n");
-#if defined (CONFIG_NAND_U_BOOT)
-    return 0;
-#endif
-	uint *pstart = (uint *) 0x00000000;
-	uint *pend = (uint *) 0x00001000;
-	uint *p;
-
-	for (p = pstart; p < pend; p++) {
-		*p = 0xaaaaaaaa;
-	}
-
-	for (p = pstart; p < pend; p++) {
-		if (*p != 0xaaaaaaaa) {
-#if !defined (CONFIG_NAND_SPL)
-			printf ("SDRAM test fails at: %08x\n", (uint) p);
-#endif
-			return 1;
-		}
-	}
-
-	for (p = pstart; p < pend; p++) {
-		*p = 0x55555555;
-	}
-
-	for (p = pstart; p < pend; p++) {
-		if (*p != 0x55555555) {
-#if !defined (CONFIG_NAND_SPL)
-			printf ("SDRAM test fails at: %08x\n", (uint) p);
-#endif
-			return 1;
-		}
-	}
-#if !defined (CONFIG_NAND_SPL)
-	printf ("SDRAM test passed!!!\n");
-#endif
-	return 0;
-}
-#endif
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c
index aa4a530..5214918 100644
--- a/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/cpu/ppc4xx/44x_spd_ddr2.c
@@ -3083,6 +3083,16 @@ static void ppc440sp_sdram_register_dump(void)
  *---------------------------------------------------------------------------*/
 long initdram(int board_type)
 {
+	/*
+	 * Only run this SDRAM init code once. For NAND booting
+	 * targets like Kilauea, we call initdram() early from the
+	 * 4k NAND booting image (CONFIG_NAND_SPL) from nand_boot().
+	 * Later on the NAND U-Boot image runs (CONFIG_NAND_U_BOOT)
+	 * which calls initdram() again. This time the controller
+	 * mustn't be reconfigured again since we're already running
+	 * from SDRAM.
+	 */
+#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
 	unsigned long val;
 
 	/* Set Memory Bank Configuration Registers */
@@ -3178,6 +3188,7 @@ long initdram(int board_type)
 #if defined(CONFIG_DDR_ECC)
 	ecc_init(CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20);
 #endif /* defined(CONFIG_DDR_ECC) */
+#endif /* !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL) */
 
 	return (CFG_MBYTES_SDRAM << 20);
 }
diff --git a/include/configs/kilauea.h b/include/configs/kilauea.h
index 035a40e..205577f 100644
--- a/include/configs/kilauea.h
+++ b/include/configs/kilauea.h
@@ -170,9 +170,9 @@
  * This NAND U-Boot (NUB) is a special U-Boot version which can be started
  * from RAM. Therefore it mustn't (re-)configure the SDRAM controller.
  *
- * On 440EPx the SPL is copied to SDRAM before the NAND controller is
- * set up. While still running from cache, I experienced problems accessing
- * the NAND controller.	sr - 2006-08-25
+ * On 405EX the SPL is copied to SDRAM before the NAND controller is
+ * set up. While still running from location 0xfffff000...0xffffffff the
+ * NAND controller cannot be accessed since it is attached to CS0 too.
  */
 #define CFG_NAND_BOOT_SPL_SRC	0xfffff000	/* SPL location			*/
 #define CFG_NAND_BOOT_SPL_SIZE	(4 << 10)	/* SPL size			*/
@@ -511,7 +511,7 @@
 
 /* Memory Bank 2 (FPGA) initialization						*/
 #define CFG_EBC_PB2AP           0x9400C800
-#define CFG_EBC_PB2CR           0xF0018000 /*  BAS=0x800,BS=1MB,BU=R/W,BW=8bit	*/
+#define CFG_EBC_PB2CR		(CFG_FPGA_BASE | 0x18000)
 
 #define CFG_EBC_CFG		0x7FC00000 /*  EBC0_CFG */
 
diff --git a/nand_spl/board/amcc/kilauea/Makefile b/nand_spl/board/amcc/kilauea/Makefile
index 84bd298..a0293ee 100644
--- a/nand_spl/board/amcc/kilauea/Makefile
+++ b/nand_spl/board/amcc/kilauea/Makefile
@@ -29,8 +29,8 @@ LDFLAGS	= -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
 AFLAGS	+= -DCONFIG_NAND_SPL
 CFLAGS	+= -DCONFIG_NAND_SPL
 
-SOBJS	= start.o init.o resetvec.o cache.o
-COBJS	= memory.o nand_boot.o nand_ecc.o ndfc.o
+SOBJS	= start.o resetvec.o cache.o
+COBJS	= 44x_spd_ddr2.o nand_boot.o nand_ecc.o ndfc.o
 
 SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
@@ -57,10 +57,18 @@ $(nandobj)u-boot-spl:	$(OBJS)
 # create symbolic links for common files
 
 # from cpu directory
+$(obj)44x_spd_ddr2.c: ecc.h
+	@rm -f $(obj)44x_spd_ddr2.c
+	ln -s $(SRCTREE)/cpu/ppc4xx/44x_spd_ddr2.c $(obj)44x_spd_ddr2.c
+
 $(obj)cache.S:
 	@rm -f $(obj)cache.S
 	ln -s $(SRCTREE)/cpu/ppc4xx/cache.S $(obj)cache.S
 
+$(obj)ecc.h:
+	@rm -f $(obj)ecc.h
+	ln -s $(SRCTREE)/cpu/ppc4xx/ecc.h $(obj)ecc.h
+
 $(obj)ndfc.c:
 	@rm -f $(obj)ndfc.c
 	ln -s $(SRCTREE)/cpu/ppc4xx/ndfc.c $(obj)ndfc.c
@@ -73,15 +81,6 @@ $(obj)start.S:
 	@rm -f $(obj)start.S
 	ln -s $(SRCTREE)/cpu/ppc4xx/start.S $(obj)start.S
 
-# from board directory
-$(obj)init.S:
-	@rm -f $(obj)init.S
-	ln -s $(SRCTREE)/board/amcc/kilauea/init.S $(obj)init.S
-
-$(obj)memory.c:
-	@rm -f $(obj)memory.c
-	ln -s $(SRCTREE)/board/amcc/kilauea/memory.c $(obj)memory.c
-
 # from nand_spl directory
 $(obj)nand_boot.c:
 	@rm -f $(obj)nand_boot.c
diff --git a/nand_spl/board/amcc/kilauea/config.mk b/nand_spl/board/amcc/kilauea/config.mk
index 2249091..d89ed3f 100644
--- a/nand_spl/board/amcc/kilauea/config.mk
+++ b/nand_spl/board/amcc/kilauea/config.mk
@@ -29,8 +29,9 @@
 #
 # On 4xx platforms the SPL is located at 0xfffff000...0xffffffff,
 # in the last 4kBytes of memory space in cache.
-# We will copy this SPL into instruction-cache in start.S. So we set
-# TEXT_BASE to starting address in i-cache here.
+# We will copy this SPL into SDRAM since we can't access the NAND
+# controller at CS0 while running from this location. So we set
+# TEXT_BASE to starting address in SDRAM here.
 #
 TEXT_BASE = 0x00800000
 
diff --git a/nand_spl/board/amcc/kilauea/u-boot.lds b/nand_spl/board/amcc/kilauea/u-boot.lds
index 084db08..03e0b79 100644
--- a/nand_spl/board/amcc/kilauea/u-boot.lds
+++ b/nand_spl/board/amcc/kilauea/u-boot.lds
@@ -32,7 +32,6 @@ SECTIONS
   .text      :
   {
     start.o	(.text)
-    init.o	(.text)
     nand_boot.o	(.text)
     ndfc.o	(.text)