MX31: Add NAND SPL boot support to i.MX31 PDK board.

Signed-off-by: Magnus Lilja <lilja.magnus@gmail.com>

9 files changed, 293 insertions, 5 deletions

diff --git a/MAKEALL b/MAKEALL
index e6f6c14..f2d3b6f 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -555,6 +555,7 @@ LIST_ARM11="			\
 	imx31_phycore_eet	\
 	mx31ads			\
 	mx31pdk			\
+	mx31pdk_nand		\
 	qong			\
 	smdk6400		\
 "
diff --git a/Makefile b/Makefile
index d486b55..763a202 100644
--- a/Makefile
+++ b/Makefile
@@ -3143,8 +3143,16 @@ imx31_phycore_config	: unconfig
 mx31ads_config		: unconfig
 	@$(MKCONFIG) $(@:_config=) arm arm1136 mx31ads freescale mx31
 
-mx31pdk_config		: unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm1136 mx31pdk freescale mx31
+mx31pdk_config \
+mx31pdk_nand_config	: unconfig
+	@mkdir -p $(obj)include
+	@if [ -n "$(findstring _nand_,$@)" ]; then					\
+		echo "#define CONFIG_NAND_U_BOOT" >> $(obj)include/config.h;		\
+	else										\
+		echo "#define CONFIG_SKIP_LOWLEVEL_INIT" >> $(obj)include/config.h;	\
+		echo "#define CONFIG_SKIP_RELOCATE_UBOOT" >> $(obj)include/config.h;	\
+	fi
+	@$(MKCONFIG) -a mx31pdk arm arm1136 mx31pdk freescale mx31
 
 omap2420h4_config	: unconfig
 	@$(MKCONFIG) $(@:_config=) arm arm1136 omap2420h4 NULL omap24xx
diff --git a/board/freescale/mx31pdk/config.mk b/board/freescale/mx31pdk/config.mk
index d34dc02..dcaa09f 100644
--- a/board/freescale/mx31pdk/config.mk
+++ b/board/freescale/mx31pdk/config.mk
@@ -1 +1,5 @@
+ifdef CONFIG_NAND_SPL
+TEXT_BASE = 0x87ec0000
+else
 TEXT_BASE = 0x87f00000
+endif
diff --git a/board/freescale/mx31pdk/lowlevel_init.S b/board/freescale/mx31pdk/lowlevel_init.S
new file mode 100644
index 0000000..cd0503e
--- /dev/null
+++ b/board/freescale/mx31pdk/lowlevel_init.S
@@ -0,0 +1,93 @@
+/*
+ * (C) Copyright 2009 Magnus Lilja <lilja.magnus@gmail.com>
+ *
+ * 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 <asm/arch/mx31-regs.h>
+#include <asm/macro.h>
+
+.globl lowlevel_init
+lowlevel_init:
+	/* Also setup the Peripheral Port Remap register inside the core */
+	ldr	r0, =ARM_PPMRR      /* start from AIPS 2GB region */
+	mcr	p15, 0, r0, c15, c2, 4
+
+	write32	IPU_CONF, IPU_CONF_DI_EN
+	write32	CCM_CCMR, CCM_CCMR_SETUP
+
+	wait_timer	0x40000
+
+	write32	CCM_CCMR, CCM_CCMR_SETUP | CCMR_MPE
+	write32	CCM_CCMR, (CCM_CCMR_SETUP | CCMR_MPE) & ~CCMR_MDS
+
+	/* Set up clock to 532MHz */
+	write32	CCM_PDR0, CCM_PDR0_SETUP_532MHZ
+	write32	CCM_MPCTL, CCM_MPCTL_SETUP_532MHZ
+
+	write32	CCM_SPCTL, PLL_PD(1) | PLL_MFD(4) | PLL_MFI(12) | PLL_MFN(1)
+
+	/* Set up MX31 DDR pins */
+	write32	IOMUXC_SW_PAD_CTL_SDCKE1_SDCLK_SDCLK_B, 0
+	write32	IOMUXC_SW_PAD_CTL_CAS_SDWE_SDCKE0, 0
+	write32	IOMUXC_SW_PAD_CTL_BCLK_RW_RAS, 0
+	write32	IOMUXC_SW_PAD_CTL_CS2_CS3_CS4, 0x1000
+	write32	IOMUXC_SW_PAD_CTL_DQM3_EB0_EB1, 0
+	write32	IOMUXC_SW_PAD_CTL_DQM0_DQM1_DQM2, 0
+	write32	IOMUXC_SW_PAD_CTL_SD29_SD30_SD31, 0
+	write32	IOMUXC_SW_PAD_CTL_SD26_SD27_SD28, 0
+	write32	IOMUXC_SW_PAD_CTL_SD23_SD24_SD25, 0
+	write32	IOMUXC_SW_PAD_CTL_SD20_SD21_SD22, 0
+	write32	IOMUXC_SW_PAD_CTL_SD17_SD18_SD19, 0
+	write32	IOMUXC_SW_PAD_CTL_SD14_SD15_SD16, 0
+	write32	IOMUXC_SW_PAD_CTL_SD11_SD12_SD13, 0
+	write32	IOMUXC_SW_PAD_CTL_SD8_SD9_SD10, 0
+	write32	IOMUXC_SW_PAD_CTL_SD5_SD6_SD7, 0
+	write32	IOMUXC_SW_PAD_CTL_SD2_SD3_SD4, 0
+	write32	IOMUXC_SW_PAD_CTL_SDBA0_SD0_SD1, 0
+	write32	IOMUXC_SW_PAD_CTL_A24_A25_SDBA1, 0
+	write32	IOMUXC_SW_PAD_CTL_A21_A22_A23, 0
+	write32	IOMUXC_SW_PAD_CTL_A18_A19_A20, 0
+	write32	IOMUXC_SW_PAD_CTL_A15_A16_A17, 0
+	write32	IOMUXC_SW_PAD_CTL_A12_A13_A14, 0
+	write32	IOMUXC_SW_PAD_CTL_A10_MA10_A11, 0
+	write32	IOMUXC_SW_PAD_CTL_A7_A8_A9, 0
+	write32	IOMUXC_SW_PAD_CTL_A4_A5_A6, 0
+	write32	IOMUXC_SW_PAD_CTL_A1_A2_A3, 0
+	write32	IOMUXC_SW_PAD_CTL_VPG0_VPG1_A0, 0
+
+	/* Set up MX31 DDR Memory Controller */
+	write32	WEIM_ESDMISC, ESDMISC_MDDR_SETUP
+	write32	WEIM_ESDCFG0, ESDCFG0_MDDR_SETUP
+
+	/* Perform DDR init sequence */
+	write32	WEIM_ESDCTL0, ESDCTL_PRECHARGE
+	write32	CSD0_BASE | 0x0f00, 0x12344321
+	write32	WEIM_ESDCTL0, ESDCTL_AUTOREFRESH
+	write32	CSD0_BASE, 0x12344321
+	write32	CSD0_BASE, 0x12344321
+	write32	WEIM_ESDCTL0, ESDCTL_LOADMODEREG
+	write8	CSD0_BASE | 0x00000033, 0xda
+	write8	CSD0_BASE | 0x01000000, 0xff
+	write32	WEIM_ESDCTL0, ESDCTL_RW
+	write32	CSD0_BASE, 0xDEADBEEF
+	write32	WEIM_ESDMISC, ESDMISC_MDDR_RESET_DL
+
+	mov	pc, lr
diff --git a/include/asm-arm/arch-mx31/mx31-regs.h b/include/asm-arm/arch-mx31/mx31-regs.h
index 76f4d53..51b02a2 100644
--- a/include/asm-arm/arch-mx31/mx31-regs.h
+++ b/include/asm-arm/arch-mx31/mx31-regs.h
@@ -61,6 +61,29 @@
 #define PLL_MFI(x)		(((x) & 0xf) << 10)
 #define PLL_MFN(x)		(((x) & 0x3ff) << 0)
 
+#define WEIM_ESDCTL0	0xB8001000
+#define WEIM_ESDCFG0	0xB8001004
+#define WEIM_ESDCTL1	0xB8001008
+#define WEIM_ESDCFG1	0xB800100C
+#define WEIM_ESDMISC	0xB8001010
+
+#define ESDCTL_SDE			(1 << 31)
+#define ESDCTL_CMD_RW			(0 << 28)
+#define ESDCTL_CMD_PRECHARGE		(1 << 28)
+#define ESDCTL_CMD_AUTOREFRESH		(2 << 28)
+#define ESDCTL_CMD_LOADMODEREG		(3 << 28)
+#define ESDCTL_CMD_MANUALREFRESH	(4 << 28)
+#define ESDCTL_ROW_13			(2 << 24)
+#define ESDCTL_ROW(x)			((x) << 24)
+#define ESDCTL_COL_9			(1 << 20)
+#define ESDCTL_COL(x)			((x) << 20)
+#define ESDCTL_DSIZ(x)			((x) << 16)
+#define ESDCTL_SREFR(x)			((x) << 13)
+#define ESDCTL_PWDT(x)			((x) << 10)
+#define ESDCTL_FP(x)			((x) << 8)
+#define ESDCTL_BL(x)			((x) << 7)
+#define ESDCTL_PRCT(x)			((x) << 0)
+
 #define WEIM_BASE	0xb8002000
 #define CSCR_U(x)	(WEIM_BASE + (x) * 0x10)
 #define CSCR_L(x)	(WEIM_BASE + 4 + (x) * 0x10)
@@ -181,6 +204,37 @@
 #define MUX_CSPI2_MOSI__I2C2_SCL IOMUX_MODE(MUX_CTL_CSPI2_MOSI, MUX_CTL_ALT1)
 #define MUX_CSPI2_MISO__I2C2_SDA IOMUX_MODE(MUX_CTL_CSPI2_MISO, MUX_CTL_ALT1)
 
+/* PAD control registers for SDR/DDR */
+#define IOMUXC_SW_PAD_CTL_SDCKE1_SDCLK_SDCLK_B	(IOMUXC_BASE + 0x26C)
+#define IOMUXC_SW_PAD_CTL_CAS_SDWE_SDCKE0	(IOMUXC_BASE + 0x270)
+#define IOMUXC_SW_PAD_CTL_BCLK_RW_RAS		(IOMUXC_BASE + 0x274)
+#define IOMUXC_SW_PAD_CTL_CS5_ECB_LBA		(IOMUXC_BASE + 0x278)
+#define IOMUXC_SW_PAD_CTL_CS2_CS3_CS4		(IOMUXC_BASE + 0x27C)
+#define IOMUXC_SW_PAD_CTL_OE_CS0_CS1		(IOMUXC_BASE + 0x280)
+#define IOMUXC_SW_PAD_CTL_DQM3_EB0_EB1		(IOMUXC_BASE + 0x284)
+#define IOMUXC_SW_PAD_CTL_DQM0_DQM1_DQM2	(IOMUXC_BASE + 0x288)
+#define IOMUXC_SW_PAD_CTL_SD29_SD30_SD31	(IOMUXC_BASE + 0x28C)
+#define IOMUXC_SW_PAD_CTL_SD26_SD27_SD28	(IOMUXC_BASE + 0x290)
+#define IOMUXC_SW_PAD_CTL_SD23_SD24_SD25	(IOMUXC_BASE + 0x294)
+#define IOMUXC_SW_PAD_CTL_SD20_SD21_SD22	(IOMUXC_BASE + 0x298)
+#define IOMUXC_SW_PAD_CTL_SD17_SD18_SD19	(IOMUXC_BASE + 0x29C)
+#define IOMUXC_SW_PAD_CTL_SD14_SD15_SD16	(IOMUXC_BASE + 0x2A0)
+#define IOMUXC_SW_PAD_CTL_SD11_SD12_SD13	(IOMUXC_BASE + 0x2A4)
+#define IOMUXC_SW_PAD_CTL_SD8_SD9_SD10		(IOMUXC_BASE + 0x2A8)
+#define IOMUXC_SW_PAD_CTL_SD5_SD6_SD7		(IOMUXC_BASE + 0x2AC)
+#define IOMUXC_SW_PAD_CTL_SD2_SD3_SD4		(IOMUXC_BASE + 0x2B0)
+#define IOMUXC_SW_PAD_CTL_SDBA0_SD0_SD1		(IOMUXC_BASE + 0x2B4)
+#define IOMUXC_SW_PAD_CTL_A24_A25_SDBA1		(IOMUXC_BASE + 0x2B8)
+#define IOMUXC_SW_PAD_CTL_A21_A22_A23		(IOMUXC_BASE + 0x2BC)
+#define IOMUXC_SW_PAD_CTL_A18_A19_A20		(IOMUXC_BASE + 0x2C0)
+#define IOMUXC_SW_PAD_CTL_A15_A16_A17		(IOMUXC_BASE + 0x2C4)
+#define IOMUXC_SW_PAD_CTL_A12_A13_A14		(IOMUXC_BASE + 0x2C8)
+#define IOMUXC_SW_PAD_CTL_A10_MA10_A11		(IOMUXC_BASE + 0x2CC)
+#define IOMUXC_SW_PAD_CTL_A7_A8_A9		(IOMUXC_BASE + 0x2D0)
+#define IOMUXC_SW_PAD_CTL_A4_A5_A6		(IOMUXC_BASE + 0x2D4)
+#define IOMUXC_SW_PAD_CTL_A1_A2_A3		(IOMUXC_BASE + 0x2D8)
+#define IOMUXC_SW_PAD_CTL_VPG0_VPG1_A0		(IOMUXC_BASE + 0x2DC)
+
 /*
  * Memory regions and CS
  */
diff --git a/include/configs/mx31pdk.h b/include/configs/mx31pdk.h
index 7167e9d..a4862c6 100644
--- a/include/configs/mx31pdk.h
+++ b/include/configs/mx31pdk.h
@@ -43,10 +43,10 @@
 #define CONFIG_SETUP_MEMORY_TAGS	1
 #define CONFIG_INITRD_TAG		1
 
-/* No support for NAND boot for i.MX31 PDK yet, so we rely on some other
- * program to initialize the SDRAM.
- */
+#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
 #define CONFIG_SKIP_LOWLEVEL_INIT
+#define CONFIG_SKIP_RELOCATE_UBOOT
+#endif
 
 /*
  * Size of malloc() pool
@@ -159,4 +159,41 @@
 
 #define CONFIG_ENV_SIZE		(128 * 1024)
 
+/* NAND configuration for the NAND_SPL */
+
+/* Start copying real U-boot from the second page */
+#define CONFIG_SYS_NAND_U_BOOT_OFFS	0x800
+#define CONFIG_SYS_NAND_U_BOOT_SIZE	0x30000
+/* Load U-Boot to this address */
+#define CONFIG_SYS_NAND_U_BOOT_DST	0x87f00000
+#define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_NAND_U_BOOT_DST
+
+#define CONFIG_SYS_NAND_PAGE_SIZE	0x800
+#define CONFIG_SYS_NAND_BLOCK_SIZE	(128 * 1024)
+#define CONFIG_SYS_NAND_PAGE_COUNT	64
+#define CONFIG_SYS_NAND_SIZE		(256 * 1024 * 1024)
+#define CONFIG_SYS_NAND_BAD_BLOCK_POS	0
+
+
+/* Configuration of lowlevel_init.S (clocks and SDRAM) */
+#define CCM_CCMR_SETUP		0x074B0BF5
+#define CCM_PDR0_SETUP_532MHZ	(PDR0_CSI_PODF(0x1ff) | PDR0_PER_PODF(7) | \
+				 PDR0_HSP_PODF(3) | PDR0_NFC_PODF(5) |     \
+				 PDR0_IPG_PODF(1) | PDR0_MAX_PODF(3) |     \
+				 PDR0_MCU_PODF(0))
+#define CCM_MPCTL_SETUP_532MHZ	(PLL_PD(0) | PLL_MFD(51) | PLL_MFI(10) |   \
+				 PLL_MFN(12))
+
+#define ESDMISC_MDDR_SETUP	0x00000004
+#define ESDMISC_MDDR_RESET_DL	0x0000000c
+#define ESDCFG0_MDDR_SETUP	0x006ac73a
+
+#define ESDCTL_ROW_COL		(ESDCTL_SDE | ESDCTL_ROW(2) | ESDCTL_COL(2))
+#define ESDCTL_SETTINGS		(ESDCTL_ROW_COL | ESDCTL_SREFR(3) | \
+				 ESDCTL_DSIZ(2) | ESDCTL_BL(1))
+#define ESDCTL_PRECHARGE	(ESDCTL_ROW_COL | ESDCTL_CMD_PRECHARGE)
+#define ESDCTL_AUTOREFRESH	(ESDCTL_ROW_COL | ESDCTL_CMD_AUTOREFRESH)
+#define ESDCTL_LOADMODEREG	(ESDCTL_ROW_COL | ESDCTL_CMD_LOADMODEREG)
+#define ESDCTL_RW		ESDCTL_SETTINGS
+
 #endif /* __CONFIG_H */
diff --git a/nand_spl/board/freescale/mx31pdk/Makefile b/nand_spl/board/freescale/mx31pdk/Makefile
new file mode 100644
index 0000000..a9572ba
--- /dev/null
+++ b/nand_spl/board/freescale/mx31pdk/Makefile
@@ -0,0 +1,54 @@
+CONFIG_NAND_SPL	= y
+
+include $(TOPDIR)/config.mk
+include $(TOPDIR)/nand_spl/board/$(BOARDDIR)/config.mk
+
+LDSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lds
+LDFLAGS	= -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
+AFLAGS	+= -DCONFIG_PRELOADER -DCONFIG_NAND_SPL
+CFLAGS	+= -DCONFIG_PRELOADER -DCONFIG_NAND_SPL
+
+SOBJS	= start.o lowlevel_init.o
+COBJS	= nand_boot_fsl_nfc.o
+
+SRCS	:= $(SRCTREE)/nand_spl/nand_boot_fsl_nfc.c
+SRCS	+= $(SRCTREE)/cpu/arm1136/start.S
+SRCS	+= $(SRCTREE)/board/freescale/mx31pdk/lowlevel_init.S
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+__OBJS	:= $(SOBJS) $(COBJS)
+LNDIR	:= $(OBJTREE)/nand_spl/board/$(BOARDDIR)
+
+nandobj	:= $(OBJTREE)/nand_spl/
+
+ALL	= $(nandobj)u-boot-spl $(nandobj)u-boot-spl.bin $(nandobj)u-boot-spl-16k.bin
+
+all:	$(obj).depend $(ALL)
+
+$(nandobj)u-boot-spl-16k.bin: $(nandobj)u-boot-spl
+	$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(PAD_TO) -O binary $< $@
+
+$(nandobj)u-boot-spl.bin:	$(nandobj)u-boot-spl
+	$(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
+
+$(nandobj)u-boot-spl:	$(OBJS)
+	cd $(LNDIR) && $(LD) $(LDFLAGS) $(__OBJS) \
+		-Map $(nandobj)u-boot-spl.map \
+		-o $@
+
+#########################################################################
+
+$(obj)%.o:	$(SRCTREE)/cpu/arm1136/%.S
+	$(CC) $(AFLAGS) -c -o $@ $<
+
+$(obj)%.o:	$(SRCTREE)/board/freescale/mx31pdk/%.S
+	$(CC) $(AFLAGS) -c -o $@ $<
+
+$(obj)%.o:	$(SRCTREE)/nand_spl/%.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/nand_spl/board/freescale/mx31pdk/config.mk b/nand_spl/board/freescale/mx31pdk/config.mk
new file mode 100644
index 0000000..68afbf1
--- /dev/null
+++ b/nand_spl/board/freescale/mx31pdk/config.mk
@@ -0,0 +1 @@
+PAD_TO	:= 2048
diff --git a/nand_spl/board/freescale/mx31pdk/u-boot.lds b/nand_spl/board/freescale/mx31pdk/u-boot.lds
new file mode 100644
index 0000000..edd8430
--- /dev/null
+++ b/nand_spl/board/freescale/mx31pdk/u-boot.lds
@@ -0,0 +1,36 @@
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text :
+	{
+		start.o			(.text)
+		lowlevel_init.o		(.text)
+		nand_boot_fsl_nfc.o	(.text)
+		*(.text)
+		. = 2K;
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : { *(.data) }
+
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	. = .;
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}