Add board support for hawkboard

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>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

3 files changed, 217 insertions, 0 deletions

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 */