Patchwork [U-Boot,1/1,V7] Add board support for hawkboard

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Submitter Sughosh Ganu
Date Nov. 29, 2010, 3:52 p.m.
Message ID <1291045974-3761-1-git-send-email-urwithsughosh@gmail.com>
Download mbox | patch
Permalink /patch/73439/
State Accepted
Commit 48571ff00526701c88cfcac1294adf20aeeade74
Delegated to: Sandeep Paulraj
Headers show

Comments

Sughosh Ganu - Nov. 29, 2010, 3:52 p.m.
The patch adds basic board support for TI's OMAP-L138 based
Hawkboard. This board is pretty similar to the da850 EVM. Support for
nand and network access is added in this version.

The following bootup procedure is used.

At reset, the Rom Boot Loader(RBL), initialises the ddr and the nand
controllers and copies the second stage bootloader(nand_spl) to
RAM. The secondary bootloader then copies u-boot from a predefined
location in the nand flash to the RAM, and passes control to the
u-boot image.

Three config options are supported
* hawkboard_config - Used to create the u-boot.bin. Tftp the
 u-boot.bin image to the RAM from u-boot, and flash to the nand flash
 at address 0xe0000.

* hawkboard_nand_config - Used to generate the secondary
 bootloader(nand_spl) image. This creates an elf file u-boot-spl
 under nand_spl/. Create an AIS signed image using this file, and
 flash it to the nand flash at address 0x20000. The ais file should
 fit in one block.

* hawkboard_uart_config - This is same as the first image, but with
 the TEXT_BASE as expected by the RBL(0xc1080000). Create the AIS

Signed-off-by: Sughosh Ganu <urwithsughosh@gmail.com>
Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
---
Changes since V6
 * Rebased off u-boot-ti next.
 * Moved CONFIG_SYS_TEXT_BASE declarations to the board config file.

 MAINTAINERS                                      |    5 +
 arch/arm/include/asm/arch-davinci/da8xx_common.h |    3 +
 arch/arm/include/asm/arch-davinci/hardware.h     |    5 +-
 board/davinci/common/Makefile                    |    2 +-
 board/davinci/common/davinci_pinmux.c            |  105 +++++++++++
 board/davinci/common/misc.c                      |   75 --------
 board/davinci/da8xxevm/Makefile                  |    1 +
 board/davinci/da8xxevm/hawkboard.c               |   69 +++++++
 board/davinci/da8xxevm/hawkboard_nand_spl.c      |  158 +++++++++++++++++
 boards.cfg                                       |    3 +
 doc/README.hawkboard                             |   93 ++++++++++
 include/configs/hawkboard.h                      |  206 ++++++++++++++++++++++
 nand_spl/board/davinci/da8xxevm/Makefile         |  141 +++++++++++++++
 nand_spl/board/davinci/da8xxevm/u-boot.lds       |   75 ++++++++
 nand_spl/nand_boot.c                             |    1 +
 15 files changed, 865 insertions(+), 77 deletions(-)
 create mode 100644 board/davinci/common/davinci_pinmux.c
 create mode 100644 board/davinci/da8xxevm/hawkboard.c
 create mode 100644 board/davinci/da8xxevm/hawkboard_nand_spl.c
 create mode 100644 doc/README.hawkboard
 create mode 100644 include/configs/hawkboard.h
 create mode 100644 nand_spl/board/davinci/da8xxevm/Makefile
 create mode 100644 nand_spl/board/davinci/da8xxevm/u-boot.lds
Sandeep Paulraj - Nov. 30, 2010, 4:27 p.m.
> 
> The patch adds basic board support for TI's OMAP-L138 based
> Hawkboard. This board is pretty similar to the da850 EVM. Support for
> nand and network access is added in this version.
> 
> The following bootup procedure is used.
> 
> At reset, the Rom Boot Loader(RBL), initialises the ddr and the nand
> controllers and copies the second stage bootloader(nand_spl) to
> RAM. The secondary bootloader then copies u-boot from a predefined
> location in the nand flash to the RAM, and passes control to the
> u-boot image.
> 
> Three config options are supported
> * hawkboard_config - Used to create the u-boot.bin. Tftp the
>  u-boot.bin image to the RAM from u-boot, and flash to the nand flash
>  at address 0xe0000.
> 
> * hawkboard_nand_config - Used to generate the secondary
>  bootloader(nand_spl) image. This creates an elf file u-boot-spl
>  under nand_spl/. Create an AIS signed image using this file, and
>  flash it to the nand flash at address 0x20000. The ais file should
>  fit in one block.
> 
> * hawkboard_uart_config - This is same as the first image, but with
>  the TEXT_BASE as expected by the RBL(0xc1080000). Create the AIS
> 
> Signed-off-by: Sughosh Ganu <urwithsughosh@gmail.com>
> Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>

Pushed to u-boot-ti/next

http://git.denx.de/?p=u-boot/u-boot-ti.git;a=commitdiff;h=48571ff00526701c88cfcac1294adf20aeeade74

Regards,
Sandeep

Patch

diff --git a/MAINTAINERS b/MAINTAINERS
index f47fca5..ad335bc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -853,6 +853,11 @@  Alex Z
 	lart		SA1100
 	dnp1110		SA1110
 
+Syed Mohammed Khasim <sm.khasim@gmail.com>
+Sughosh Ganu <urwithsughosh@gmail.com>
+
+	hawkboard	ARM926EJS (OMAP-L138)
+
 -------------------------------------------------------------------------
 
 Unknown / orphaned boards:
diff --git a/arch/arm/include/asm/arch-davinci/da8xx_common.h b/arch/arm/include/asm/arch-davinci/da8xx_common.h
index 7ae63a6..bc3092d 100644
--- a/arch/arm/include/asm/arch-davinci/da8xx_common.h
+++ b/arch/arm/include/asm/arch-davinci/da8xx_common.h
@@ -19,6 +19,9 @@ 
 #ifndef __COMMON_H
 #define __COMMON_H
 
+#define	HAWKBOARD_KICK0_UNLOCK		0x83e70b13
+#define	HAWKBOARD_KICK1_UNLOCK		0x95a4f1e0
+
 struct lpsc_resource {
 	const int	lpsc_no;
 };
diff --git a/arch/arm/include/asm/arch-davinci/hardware.h b/arch/arm/include/asm/arch-davinci/hardware.h
index 21b2076..ef616c1 100644
--- a/arch/arm/include/asm/arch-davinci/hardware.h
+++ b/arch/arm/include/asm/arch-davinci/hardware.h
@@ -384,7 +384,10 @@  int clk_get(enum davinci_clk_ids id);
 /* Boot config */
 struct davinci_syscfg_regs {
 	dv_reg	revid;
-	dv_reg	rsvd[71];
+	dv_reg	rsvd[13];
+	dv_reg	kick0;
+	dv_reg	kick1;
+	dv_reg	rsvd1[56];
 	dv_reg	pinmux[20];
 	dv_reg	suspsrc;
 	dv_reg	chipsig;
diff --git a/board/davinci/common/Makefile b/board/davinci/common/Makefile
index 5ddb564..a1d3de2 100644
--- a/board/davinci/common/Makefile
+++ b/board/davinci/common/Makefile
@@ -29,7 +29,7 @@  endif
 
 LIB	= $(obj)lib$(VENDOR).o
 
-COBJS	:= misc.o
+COBJS	:= misc.o davinci_pinmux.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
diff --git a/board/davinci/common/davinci_pinmux.c b/board/davinci/common/davinci_pinmux.c
new file mode 100644
index 0000000..ce58f71
--- /dev/null
+++ b/board/davinci/common/davinci_pinmux.c
@@ -0,0 +1,105 @@ 
+/*
+ * DaVinci pinmux functions.
+ *
+ * Copyright (C) 2009 Nick Thompson, GE Fanuc Ltd, <nick.thompson@gefanuc.com>
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ * Copyright (C) 2008 Lyrtech <www.lyrtech.com>
+ * Copyright (C) 2004 Texas Instruments.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <asm/arch/hardware.h>
+#include <asm/io.h>
+#include <asm/arch/davinci_misc.h>
+
+/*
+ * Change the setting of a pin multiplexer field.
+ *
+ * Takes an array of pinmux settings similar to:
+ *
+ * struct pinmux_config uart_pins[] = {
+ *	{ &davinci_syscfg_regs->pinmux[8], 2, 7 },
+ *	{ &davinci_syscfg_regs->pinmux[9], 2, 0 }
+ * };
+ *
+ * Stepping through the array, each pinmux[n] register has the given value
+ * set in the pin mux field specified.
+ *
+ * The number of pins in the array must be passed (ARRAY_SIZE can provide
+ * this value conveniently).
+ *
+ * Returns 0 if all field numbers and values are in the correct range,
+ * else returns -1.
+ */
+int davinci_configure_pin_mux(const struct pinmux_config *pins,
+			      const int n_pins)
+{
+	int i;
+
+	/* check for invalid pinmux values */
+	for (i = 0; i < n_pins; i++) {
+		if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
+		    (pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
+			return -1;
+	}
+
+	/* configure the pinmuxes */
+	for (i = 0; i < n_pins; i++) {
+		const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
+		const unsigned int value = pins[i].value << offset;
+		const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
+		const dv_reg *mux = pins[i].mux;
+
+		writel(value | (readl(mux) & (~mask)), mux);
+	}
+
+	return 0;
+}
+
+/*
+ * Configure multiple pinmux resources.
+ *
+ * Takes an pinmux_resource array of pinmux_config and pin counts:
+ *
+ * const struct pinmux_resource pinmuxes[] = {
+ *	PINMUX_ITEM(uart_pins),
+ *	PINMUX_ITEM(i2c_pins),
+ * };
+ *
+ * The number of items in the array must be passed (ARRAY_SIZE can provide
+ * this value conveniently).
+ *
+ * Each item entry is configured in the defined order. If configuration
+ * of any item fails, -1 is returned and none of the following items are
+ * configured. On success, 0 is returned.
+ */
+int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
+				    const int n_items)
+{
+	int i;
+
+	for (i = 0; i < n_items; i++) {
+		if (davinci_configure_pin_mux(item[i].pins,
+					      item[i].n_pins) != 0)
+			return -1;
+	}
+
+	return 0;
+}
diff --git a/board/davinci/common/misc.c b/board/davinci/common/misc.c
index a30047b..f25ad7e 100644
--- a/board/davinci/common/misc.c
+++ b/board/davinci/common/misc.c
@@ -95,78 +95,3 @@  void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr)
 }
 
 #endif	/* DAVINCI_EMAC */
-
-/*
- * Change the setting of a pin multiplexer field.
- *
- * Takes an array of pinmux settings similar to:
- *
- * struct pinmux_config uart_pins[] = {
- *	{ &davinci_syscfg_regs->pinmux[8], 2, 7 },
- *	{ &davinci_syscfg_regs->pinmux[9], 2, 0 }
- * };
- *
- * Stepping through the array, each pinmux[n] register has the given value
- * set in the pin mux field specified.
- *
- * The number of pins in the array must be passed (ARRAY_SIZE can provide
- * this value conveniently).
- *
- * Returns 0 if all field numbers and values are in the correct range,
- * else returns -1.
- */
-int davinci_configure_pin_mux(const struct pinmux_config *pins,
-			      const int n_pins)
-{
-	int i;
-
-	/* check for invalid pinmux values */
-	for (i = 0; i < n_pins; i++) {
-		if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
-		    (pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
-			return -1;
-	}
-
-	/* configure the pinmuxes */
-	for (i = 0; i < n_pins; i++) {
-		const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
-		const unsigned int value = pins[i].value << offset;
-		const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
-		const dv_reg *mux = pins[i].mux;
-
-		writel(value | (readl(mux) & (~mask)), mux);
-	}
-
-	return 0;
-}
-
-/*
- * Configure multiple pinmux resources.
- *
- * Takes an pinmux_resource array of pinmux_config and pin counts:
- *
- * const struct pinmux_resource pinmuxes[] = {
- *	PINMUX_ITEM(uart_pins),
- *	PINMUX_ITEM(i2c_pins),
- * };
- *
- * The number of items in the array must be passed (ARRAY_SIZE can provide
- * this value conveniently).
- *
- * Each item entry is configured in the defined order. If configuration
- * of any item fails, -1 is returned and none of the following items are
- * configured. On success, 0 is returned.
- */
-int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
-				    const int n_items)
-{
-	int i;
-
-	for (i = 0; i < n_items; i++) {
-		if (davinci_configure_pin_mux(item[i].pins,
-					      item[i].n_pins) != 0)
-			return -1;
-	}
-
-	return 0;
-}
diff --git a/board/davinci/da8xxevm/Makefile b/board/davinci/da8xxevm/Makefile
index 88fee50..1816368 100644
--- a/board/davinci/da8xxevm/Makefile
+++ b/board/davinci/da8xxevm/Makefile
@@ -30,6 +30,7 @@  LIB	= $(obj)lib$(BOARD).o
 COBJS-y	+= common.o
 COBJS-$(CONFIG_MACH_DAVINCI_DA830_EVM)	+= da830evm.o
 COBJS-$(CONFIG_MACH_DAVINCI_DA850_EVM)	+= da850evm.o
+COBJS-$(CONFIG_MACH_DAVINCI_HAWK)	+= hawkboard.o
 
 COBJS   := $(COBJS-y)
 
diff --git a/board/davinci/da8xxevm/hawkboard.c b/board/davinci/da8xxevm/hawkboard.c
new file mode 100644
index 0000000..b672c9d
--- /dev/null
+++ b/board/davinci/da8xxevm/hawkboard.c
@@ -0,0 +1,69 @@ 
+/*
+ * Modified for Hawkboard - Syed Mohammed Khasim <khasim@beagleboard.org>
+ *
+ * Copyright (C) 2008 Sekhar Nori, Texas Instruments, Inc.  <nsekhar@ti.com>
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ * Copyright (C) 2004 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/arch/hardware.h>
+#include <asm/io.h>
+#include <asm/arch/davinci_misc.h>
+#include <ns16550.h>
+#include <asm/arch/da8xx_common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	/* arch number of the board */
+	gd->bd->bi_arch_number = MACH_TYPE_OMAPL138_HAWKBOARD;
+
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
+
+	return 0;
+}
+
+int board_early_init_f(void)
+{
+	/*
+	 * Kick Registers need to be set to allow access to Pin Mux registers
+	 */
+	writel(HAWKBOARD_KICK0_UNLOCK, &davinci_syscfg_regs->kick0);
+	writel(HAWKBOARD_KICK1_UNLOCK, &davinci_syscfg_regs->kick1);
+
+	/* set cfgchip3 to select mii */
+	writel(readl(&davinci_syscfg_regs->cfgchip3) &
+	       ~(1 << 8), &davinci_syscfg_regs->cfgchip3);
+
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	char buf[32];
+
+	printf("ARM Clock : %s MHz\n",
+	       strmhz(buf, clk_get(DAVINCI_ARM_CLKID)));
+
+	return 0;
+}
diff --git a/board/davinci/da8xxevm/hawkboard_nand_spl.c b/board/davinci/da8xxevm/hawkboard_nand_spl.c
new file mode 100644
index 0000000..74eec13
--- /dev/null
+++ b/board/davinci/da8xxevm/hawkboard_nand_spl.c
@@ -0,0 +1,158 @@ 
+/*
+ * Modified for Hawkboard - Syed Mohammed Khasim <khasim@beagleboard.org>
+ *
+ * Copyright (C) 2008 Sekhar Nori, Texas Instruments, Inc.  <nsekhar@ti.com>
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ * Copyright (C) 2004 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/arch/hardware.h>
+#include <asm/io.h>
+#include <asm/arch/davinci_misc.h>
+#include <ns16550.h>
+#include <asm/arch/da8xx_common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define pinmux(x)			(&davinci_syscfg_regs->pinmux[x])
+
+static const struct pinmux_config mii_pins[] = {
+	{ pinmux(2), 8, 1 },
+	{ pinmux(2), 8, 2 },
+	{ pinmux(2), 8, 3 },
+	{ pinmux(2), 8, 4 },
+	{ pinmux(2), 8, 5 },
+	{ pinmux(2), 8, 6 },
+	{ pinmux(2), 8, 7 }
+};
+
+static const struct pinmux_config mdio_pins[] = {
+	{ pinmux(4), 8, 0 },
+	{ pinmux(4), 8, 1 }
+};
+
+static const struct pinmux_config nand_pins[] = {
+	{ pinmux(7), 1, 1 },
+	{ pinmux(7), 1, 2 },
+	{ pinmux(7), 1, 4 },
+	{ pinmux(7), 1, 5 },
+	{ pinmux(9), 1, 0 },
+	{ pinmux(9), 1, 1 },
+	{ pinmux(9), 1, 2 },
+	{ pinmux(9), 1, 3 },
+	{ pinmux(9), 1, 4 },
+	{ pinmux(9), 1, 5 },
+	{ pinmux(9), 1, 6 },
+	{ pinmux(9), 1, 7 },
+	{ pinmux(12), 1, 5 },
+	{ pinmux(12), 1, 6 }
+};
+
+static const struct pinmux_config uart2_pins[] = {
+	{ pinmux(0), 4, 6 },
+	{ pinmux(0), 4, 7 },
+	{ pinmux(4), 2, 4 },
+	{ pinmux(4), 2, 5 }
+};
+
+static const struct pinmux_config i2c_pins[] = {
+	{ pinmux(4), 2, 4 },
+	{ pinmux(4), 2, 5 }
+};
+
+static const struct pinmux_resource pinmuxes[] = {
+	PINMUX_ITEM(mii_pins),
+	PINMUX_ITEM(mdio_pins),
+	PINMUX_ITEM(i2c_pins),
+	PINMUX_ITEM(nand_pins),
+	PINMUX_ITEM(uart2_pins),
+};
+
+static const struct lpsc_resource lpsc[] = {
+	{ DAVINCI_LPSC_AEMIF },	/* NAND, NOR */
+	{ DAVINCI_LPSC_SPI1 },	/* Serial Flash */
+	{ DAVINCI_LPSC_EMAC },	/* image download */
+	{ DAVINCI_LPSC_UART2 },	/* console */
+	{ DAVINCI_LPSC_GPIO },
+};
+
+void board_init_f(ulong bootflag)
+{
+	/*
+	 * Kick Registers need to be set to allow access to Pin Mux registers
+	 */
+	writel(HAWKBOARD_KICK0_UNLOCK, &davinci_syscfg_regs->kick0);
+	writel(HAWKBOARD_KICK1_UNLOCK, &davinci_syscfg_regs->kick1);
+
+	/* setup the SUSPSRC for ARM to control emulation suspend */
+	writel(readl(&davinci_syscfg_regs->suspsrc) &
+	       ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |
+		 DAVINCI_SYSCFG_SUSPSRC_SPI1 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
+		 DAVINCI_SYSCFG_SUSPSRC_UART2), &davinci_syscfg_regs->suspsrc);
+
+	/* Power on required peripherals
+	 * ARM does not have acess by default to PSC0 and PSC1
+	 * assuming here that the DSP bootloader has set the IOPU
+	 * such that PSC access is available to ARM
+	 */
+	da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc));
+
+	/* configure pinmux settings */
+	davinci_configure_pin_mux_items(pinmuxes,
+					ARRAY_SIZE(pinmuxes));
+
+	writel(readl(&davinci_uart2_ctrl_regs->pwremu_mgmt) |
+	       (DAVINCI_UART_PWREMU_MGMT_FREE) |
+	       (DAVINCI_UART_PWREMU_MGMT_URRST) |
+	       (DAVINCI_UART_PWREMU_MGMT_UTRST),
+	       &davinci_uart2_ctrl_regs->pwremu_mgmt);
+
+	NS16550_init((NS16550_t)(DAVINCI_UART2_BASE),
+			CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE);
+
+	puts("Nand boot...\n");
+
+	nand_boot();
+}
+
+void puts(const char *str)
+{
+	while (*str)
+		putc(*str++);
+}
+
+void putc(char c)
+{
+	if (gd->flags & GD_FLG_SILENT)
+		return;
+
+	if (c == '\n')
+		NS16550_putc((NS16550_t)(DAVINCI_UART2_BASE), '\r');
+
+	NS16550_putc((NS16550_t)(DAVINCI_UART2_BASE), c);
+}
+
+void hang(void)
+{
+	puts("### ERROR ### Please RESET the board ###\n");
+	for (;;)
+		;
+}
diff --git a/boards.cfg b/boards.cfg
index 2209676..beb5d81 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -76,6 +76,9 @@  pm9261                       arm         arm926ejs   -                   ronetix
 pm9263                       arm         arm926ejs   -                   ronetix        at91
 da830evm                     arm         arm926ejs   da8xxevm            davinci        davinci
 da850evm                     arm         arm926ejs   da8xxevm            davinci        davinci
+hawkboard                    arm         arm926ejs   da8xxevm            davinci        davinci
+hawkboard_nand               arm         arm926ejs   da8xxevm            davinci        davinci     hawkboard:NAND_U_BOOT
+hawkboard_uart               arm         arm926ejs   da8xxevm            davinci        davinci     hawkboard:UART_U_BOOT
 davinci_dm355evm             arm         arm926ejs   dm355evm            davinci        davinci
 davinci_dm355leopard         arm         arm926ejs   dm355leopard        davinci        davinci
 davinci_dm365evm             arm         arm926ejs   dm365evm            davinci        davinci
diff --git a/doc/README.hawkboard b/doc/README.hawkboard
new file mode 100644
index 0000000..b7afec4
--- /dev/null
+++ b/doc/README.hawkboard
@@ -0,0 +1,93 @@ 
+Summary
+=======
+The README is for the boot procedure used for TI's OMAP-L138 based
+hawkboard. The hawkboard comes with a 128MiB Nand flash and a 128MiB
+DDR SDRAM along with a host of other controllers.
+
+The hawkboard is booted in three stages. The initial bootloader which
+executes upon reset is the Rom Boot Loader(RBL) which sits in the
+internal ROM of the omap. The RBL initialises the memory and the nand
+controller, and copies the image stored at a predefined location(block
+1) of the nand flash. The image loaded by the RBL to the memory is the
+AIS signed nand_spl image. This, in turns copies the u-boot binary
+from the nand flash to the memory and jumps to the u-boot entry point.
+
+AIS is an image format defined by TI for the images that are to be
+loaded to memory by the RBL. The image is divided into a series of
+sections and the image's entry point is specified. Each section comes
+with meta data like the target address the section is to be copied to
+and the size of the section, which is used by the RBL to load the
+image. At the end of the image the RBL jumps to the image entry
+point.
+
+The secondary stage bootloader(nand_spl) which is loaded by the RBL
+then loads the u-boot from a predefined location in the nand to the
+memory and jumps to the u-boot entry point.
+
+The reason a secondary stage bootloader is used is because the ECC
+layout expected by the RBL is not the same as that used by
+u-boot/linux. This also implies that for flashing the nand_spl image,
+we need to use the u-boot which uses the ECC layout expected by the
+RBL[1]. Booting u-boot over UART(UART boot) is explained here[2].
+
+
+Compilation
+===========
+Three images might be needed
+
+* nand_spl - This is the secondary bootloader which boots the u-boot
+  binary.
+
+  hawkboard_nand_config
+
+  The nand_spl ELF gets generated under nand_spl/u-boot-spl. This
+  needs to be processed with the AISGen tool for generating the AIS
+  signed image to be flashed. Steps for generating the AIS image are
+  explained here[3].
+
+* u-boot binary - This is the image flashed to the nand and copied to
+  the memory by the nand_spl.
+
+  hawkboard_config
+
+* u-boot for uart boot - This is same as the u-boot binary generated
+  above, with the sole difference of the CONFIG_SYS_TEXT_BASE being
+  0xc1080000, as expected by the RBL.
+
+  hawkboard_uart_config
+
+
+Flashing the images to Nand
+===========================
+The nand_spl AIS image needs to be flashed to the block 1 of the
+Nand flash, as that is the location the RBL expects the image[4]. For
+flashing the nand_spl, boot over the u-boot specified in [1], and
+flash the image
+
+=> tftpboot 0xc0700000 <nand_spl_ais.bin>
+=> nand erase 0x20000 0x20000
+=> nand write.e 0xc0700000 0x20000 <nand_spl_size>
+
+The u-boot binary is flashed at location 0xe0000(block 6) of the nand
+flash. The nand_spl loader expects the u-boot at this location. For
+flashing the u-boot binary
+
+=> tftpboot 0xc0700000 u-boot.bin
+=> nand erase 0xe0000 0x40000
+=> nand write.e 0xc0700000 0xe0000 <u-boot-size>
+
+
+Links
+=====
+
+[1]
+ http://code.google.com/p/hawkboard/downloads/detail?name=u-boot_uart_ais_v1.bin
+
+[2]
+ http://elinux.org/Hawkboard#Booting_u-boot_over_UART
+
+[3]
+ http://elinux.org/Hawkboard#Signing_u-boot_for_UART_boot
+
+[4]
+ http://processors.wiki.ti.com/index.php/RBL_UBL_and_host_program#RBL_booting_from_NAND_and_ECC.2FBad_blocks
diff --git a/include/configs/hawkboard.h b/include/configs/hawkboard.h
new file mode 100644
index 0000000..23a88d0
--- /dev/null
+++ b/include/configs/hawkboard.h
@@ -0,0 +1,206 @@ 
+/*
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Based on davinci_dvevm.h. Original Copyrights follow:
+ *
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+/*
+ * Board
+ */
+#define	CONFIG_SYS_USE_NAND	1
+
+/*
+ * SoC Configuration
+ */
+#define CONFIG_MACH_DAVINCI_HAWK
+#define CONFIG_ARM926EJS		/* arm926ejs CPU core */
+#define CONFIG_SOC_DA8XX		/* TI DA8xx SoC */
+#define CONFIG_SYS_CLK_FREQ		clk_get(DAVINCI_ARM_CLKID)
+#define CONFIG_SYS_OSCIN_FREQ		24000000
+#define CONFIG_SYS_TIMERBASE		DAVINCI_TIMER0_BASE
+#define CONFIG_SYS_HZ_CLOCK		clk_get(DAVINCI_AUXCLK_CLKID)
+#define CONFIG_SYS_HZ			1000
+#define CONFIG_SKIP_LOWLEVEL_INIT
+#define CONFIG_BOARD_EARLY_INIT_F
+
+#if defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_UART_U_BOOT)
+#define CONFIG_SYS_TEXT_BASE		0xc1080000
+#else
+#define CONFIG_SYS_TEXT_BASE		0xc1180000
+#endif
+
+/*
+ * Memory Info
+ */
+#define CONFIG_SYS_MALLOC_LEN		(1*1024*1024) /* malloc() len */
+#define PHYS_SDRAM_1			DAVINCI_DDR_EMIF_DATA_BASE
+#define PHYS_SDRAM_1_SIZE		(128 << 20) /* SDRAM size 128MB */
+#define CONFIG_SYS_SDRAM_BASE		0xc0000000
+#define CONFIG_MAX_RAM_BANK_SIZE	(512 << 20)
+#define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_SDRAM_BASE + 0x1000 -\
+					GENERATED_GBL_DATA_SIZE)
+
+/* memtest start addr */
+#define CONFIG_SYS_MEMTEST_START	(PHYS_SDRAM_1)
+
+/* memtest will be run on 16MB */
+#define CONFIG_SYS_MEMTEST_END		(PHYS_SDRAM_1 + 16*1024*1024)
+
+#define CONFIG_NR_DRAM_BANKS		1 /* we have 1 bank of DRAM */
+#define CONFIG_STACKSIZE		(256*1024) /* regular stack */
+
+/*
+ * Serial Driver info
+ */
+#define CONFIG_SYS_NS16550
+#define CONFIG_SYS_NS16550_SERIAL
+#define CONFIG_SYS_NS16550_REG_SIZE	-4
+#define CONFIG_SYS_NS16550_COM1		DAVINCI_UART2_BASE
+#define CONFIG_SYS_NS16550_CLK		clk_get(DAVINCI_UART2_CLKID)
+#define CONFIG_CONS_INDEX		1
+#define CONFIG_BAUDRATE			115200
+#define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200 }
+
+/*
+ * Network & Ethernet Configuration
+ */
+#define CONFIG_EMAC_MDIO_PHY_NUM	0x7
+#if !defined(CONFIG_NAND_SPL)
+#define CONFIG_DRIVER_TI_EMAC
+#endif
+#define CONFIG_MII
+#define CONFIG_BOOTP_DEFAULT
+#define CONFIG_BOOTP_DNS
+#define CONFIG_BOOTP_DNS2
+#define CONFIG_BOOTP_SEND_HOSTNAME
+#define CONFIG_NET_RETRY_COUNT		10
+#define CONFIG_NET_MULTI
+
+/*
+ * Nand Flash
+ */
+#ifdef CONFIG_SYS_USE_NAND
+#define CONFIG_SYS_NO_FLASH
+#define CONFIG_ENV_IS_IN_NAND
+#define CONFIG_ENV_SIZE			(128 << 10)
+#define CONFIG_SYS_NAND_BASE		DAVINCI_ASYNC_EMIF_DATA_CE3_BASE
+#define CONFIG_CLE_MASK			0x10
+#define CONFIG_ALE_MASK			0x8
+#define CONFIG_SYS_NAND_USE_FLASH_BBT
+#define CONFIG_NAND_DAVINCI
+#define CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST
+#define CFG_DAVINCI_STD_NAND_LAYOUT
+#define CONFIG_SYS_NAND_CS		3
+#define CONFIG_SYS_NAND_PAGE_2K
+#define CONFIG_SYS_64BIT_VSPRINTF	/* needed for nand_util.c */
+/* Max number of NAND devices */
+#define CONFIG_SYS_MAX_NAND_DEVICE	1
+#define CONFIG_SYS_NAND_BASE_LIST	{ 0x62000000, }
+#define NAND_MAX_CHIPS			1
+/* Block 0--not used by bootcode */
+#define CONFIG_ENV_OFFSET		0x0
+
+#define CONFIG_SYS_NAND_PAGE_SIZE	(2 << 10)
+#define CONFIG_SYS_NAND_BLOCK_SIZE	(128 << 10)
+#define CONFIG_SYS_NAND_U_BOOT_OFFS	0xe0000
+#define CONFIG_SYS_NAND_U_BOOT_SIZE	0x40000
+#define CONFIG_SYS_NAND_U_BOOT_DST	0xc1180000
+#define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_NAND_U_BOOT_DST
+#define CONFIG_SYS_NAND_U_BOOT_RELOC_SP	(CONFIG_SYS_NAND_U_BOOT_DST - \
+					CONFIG_SYS_NAND_U_BOOT_SIZE - \
+					CONFIG_SYS_MALLOC_LEN -       \
+					GENERATED_GBL_DATA_SIZE)
+#define CONFIG_SYS_NAND_ECCPOS		{				\
+				24, 25, 26, 27, 28,			\
+				29, 30, 31, 32, 33, 34, 35, 36, 37, 38,	\
+				39, 40, 41, 42, 43, 44, 45, 46, 47, 48,	\
+				49, 50, 51, 52, 53, 54, 55, 56, 57, 58,	\
+				59, 60, 61, 62, 63 }
+#define CONFIG_SYS_NAND_PAGE_COUNT	64
+#define CONFIG_SYS_NAND_BAD_BLOCK_POS	0
+#define CONFIG_SYS_NAND_ECCSIZE		512
+#define CONFIG_SYS_NAND_ECCBYTES	10
+#define CONFIG_SYS_NAND_ECCSTEPS	(CONFIG_SYS_NAND_PAGE_SIZE /	 \
+					 CONFIG_SYS_NAND_ECCSIZE)
+#define CONFIG_SYS_NAND_OOBSIZE		64
+#define CONFIG_SYS_NAND_ECCTOTAL	(CONFIG_SYS_NAND_ECCBYTES *	\
+					CONFIG_SYS_NAND_ECCSTEPS)
+#endif /* CONFIG_SYS_USE_NAND */
+
+/*
+ * U-Boot general configuration
+ */
+#define CONFIG_MISC_INIT_R
+#define CONFIG_BOOTFILE		"uImage" /* Boot file name */
+#define CONFIG_SYS_PROMPT	"hawkboard > " /* Command Prompt */
+#define CONFIG_SYS_CBSIZE	1024 /* Console I/O Buffer Size	*/
+#define CONFIG_SYS_PBSIZE	(CONFIG_SYS_CBSIZE+sizeof(CONFIG_SYS_PROMPT)+16)
+#define CONFIG_SYS_MAXARGS	16 /* max number of command args */
+#define CONFIG_SYS_BARGSIZE	CONFIG_SYS_CBSIZE /* Boot Args Buffer Size */
+#define CONFIG_SYS_LOAD_ADDR	(PHYS_SDRAM_1 + 0x700000)
+#define CONFIG_VERSION_VARIABLE
+#define CONFIG_AUTO_COMPLETE
+#define CONFIG_SYS_HUSH_PARSER
+#define CONFIG_SYS_PROMPT_HUSH_PS2	"> "
+#define CONFIG_CMDLINE_EDITING
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_CRC32_VERIFY
+#define CONFIG_MX_CYCLIC
+
+/*
+ * Linux Information
+ */
+#define LINUX_BOOT_PARAM_ADDR	(CONFIG_SYS_MEMTEST_START + 0x100)
+#define CONFIG_CMDLINE_TAG
+#define CONFIG_SETUP_MEMORY_TAGS
+#define CONFIG_BOOTARGS		\
+	"mem=128M console=ttyS2,115200n8 root=/dev/ram0 rw initrd=0xc1180000,"\
+					"4M ip=static"
+#define CONFIG_BOOTDELAY	3
+
+/*
+ * U-Boot commands
+ */
+#include <config_cmd_default.h>
+#define CONFIG_CMD_ENV
+#define CONFIG_CMD_ASKENV
+#define CONFIG_CMD_DHCP
+#define CONFIG_CMD_DIAG
+#define CONFIG_CMD_MII
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_SAVES
+#define CONFIG_CMD_MEMORY
+
+#ifdef CONFIG_SYS_USE_NAND
+#undef CONFIG_CMD_FLASH
+#undef CONFIG_CMD_IMLS
+#define CONFIG_CMD_NAND
+#endif
+
+#ifndef CONFIG_DRIVER_TI_EMAC
+#undef CONFIG_CMD_NET
+#undef CONFIG_CMD_DHCP
+#undef CONFIG_CMD_MII
+#undef CONFIG_CMD_PING
+#endif
+
+#endif /* __CONFIG_H */
diff --git a/nand_spl/board/davinci/da8xxevm/Makefile b/nand_spl/board/davinci/da8xxevm/Makefile
new file mode 100644
index 0000000..6102675
--- /dev/null
+++ b/nand_spl/board/davinci/da8xxevm/Makefile
@@ -0,0 +1,141 @@ 
+#
+# (C) Copyright 2006-2007
+# Stefan Roese, DENX Software Engineering, sr@denx.de.
+#
+# (C) Copyright 2008
+# Guennadi Liakhovetki, DENX Software Engineering, <lg@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
+#
+
+CONFIG_NAND_SPL	= y
+
+include $(TOPDIR)/config.mk
+
+LDSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lds
+LDFLAGS	= -Bstatic -T $(nandobj)u-boot.lds -Ttext $(CONFIG_SYS_TEXT_BASE) $(PLATFORM_LDFLAGS)
+AFLAGS	+= -DCONFIG_PRELOADER -DCONFIG_NAND_SPL
+CFLAGS	+= -DCONFIG_PRELOADER -DCONFIG_NAND_SPL
+
+SOBJS	= start.o _udivsi3.o _divsi3.o
+COBJS	= cpu.o davinci_nand.o ns16550.o div0.o davinci_pinmux.o psc.o	\
+	common.o hawkboard_nand_spl.o nand_boot.o
+
+SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
+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:	$(ALL)
+
+$(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) $(nandobj)u-boot.lds
+	cd $(LNDIR) && $(LD) $(LDFLAGS) $(__OBJS) \
+		-Map $(nandobj)u-boot-spl.map \
+		-o $(nandobj)u-boot-spl
+
+$(nandobj)u-boot.lds: $(LDSCRIPT)
+	$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$^ >$@
+
+# create symbolic links for common files
+
+# from board directory
+$(obj)davinci_pinmux.c:
+	@rm -f $@
+	@ln -s $(TOPDIR)/board/davinci/common/davinci_pinmux.c $@
+
+# from drivers/mtd/nand directory
+$(obj)davinci_nand.c:
+	@rm -f $@
+	@ln -s $(TOPDIR)/drivers/mtd/nand/davinci_nand.c $@
+
+# from nand_spl directory
+$(obj)nand_boot.c:
+	@rm -f $@
+	@ln -s $(TOPDIR)/nand_spl/nand_boot.c $@
+
+# from drivers/serial directory
+$(obj)ns16550.c:
+	@rm -f $@
+	@ln -sf $(TOPDIR)/drivers/serial/ns16550.c $@
+
+# from cpu directory
+$(obj)start.S:
+	@rm -f $@
+	ln -s $(TOPDIR)/arch/arm/cpu/arm926ejs/start.S $@
+
+# from lib directory
+$(obj)_udivsi3.S:
+	@rm -f $@
+	ln -s $(TOPDIR)/arch/arm/lib/_udivsi3.S $@
+
+# from lib directory
+$(obj)_divsi3.S:
+	@rm -f $@
+	ln -s $(TOPDIR)/arch/arm/lib/_divsi3.S $@
+
+# from lib directory
+$(obj)div0.c:
+	@rm -f $@
+	ln -s $(TOPDIR)/arch/arm/lib/div0.c $@
+
+# from SoC directory
+$(obj)cpu.c:
+	@rm -f $@
+	@ln -s $(TOPDIR)/arch/arm/cpu/arm926ejs/davinci/cpu.c $@
+
+# from board directory
+$(obj)hawkboard_nand_spl.c:
+	@rm -f $@
+	ln -s $(TOPDIR)/board/davinci/da8xxevm/hawkboard_nand_spl.c $@
+
+# from board directory
+$(obj)common.c:
+	@rm -f $@
+	ln -s $(TOPDIR)/board/davinci/da8xxevm/common.c $@
+
+$(obj)psc.c:
+	@rm -f $@
+	ln -s $(TOPDIR)/arch/arm/cpu/arm926ejs/davinci/psc.c $@
+
+
+#########################################################################
+
+$(obj)%.o:	$(obj)%.S
+	$(CC) $(AFLAGS) -c -o $@ $<
+
+$(obj)%.o:	$(obj)%.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/nand_spl/board/davinci/da8xxevm/u-boot.lds b/nand_spl/board/davinci/da8xxevm/u-boot.lds
new file mode 100644
index 0000000..f6ccf08
--- /dev/null
+++ b/nand_spl/board/davinci/da8xxevm/u-boot.lds
@@ -0,0 +1,75 @@ 
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * (C) Copyright 2008
+ * Guennadi Liakhovetki, DENX Software Engineering, <lg@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
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0xc1080000;
+
+	. = ALIGN(4);
+	.text      :
+	{
+	  start.o	(.text)
+	  cpu.o		(.text)
+	  nand_boot.o	(.text)
+
+	  *(.text)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : {
+		*(.data)
+	__datarel_start = .;
+		*(.data.rel)
+	__datarelrolocal_start = .;
+		*(.data.rel.ro.local)
+	__datarellocal_start = .;
+		*(.data.rel.local)
+	__datarelro_start = .;
+		*(.data.rel.ro)
+	}
+
+	. = ALIGN(4);
+	__rel_dyn_start = .;
+	__rel_dyn_end = .;
+	__dynsym_start = .;
+
+	__got_start = .;
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	__got_end = .;
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}
diff --git a/nand_spl/nand_boot.c b/nand_spl/nand_boot.c
index b9fd6f5..76b8566 100644
--- a/nand_spl/nand_boot.c
+++ b/nand_spl/nand_boot.c
@@ -236,6 +236,7 @@  void nand_boot(void)
 	/*
 	 * Init board specific nand support
 	 */
+	nand_chip.select_chip = NULL;
 	nand_info.priv = &nand_chip;
 	nand_chip.IO_ADDR_R = nand_chip.IO_ADDR_W = (void  __iomem *)CONFIG_SYS_NAND_BASE;
 	nand_chip.dev_ready = NULL;	/* preset to NULL */