ppc4xx: Add NAND booting support for AMCC Acadia (405EZ) eval board

This patch adds NAND booting support for the AMCC Acadia eval board.

Please make sure to configure jumper J7 to position 2-3 when booting
from NOR, and to position 1-2 when booting for NAND.

I also added a board command to configure the I2C bootstrap EEPROM
values. Right now only 267MHz is support for booting either via NOR
or NAND FLASH. Here the usage:

=> bootstrap 267 nor	;to configure the board for 267MHz NOR booting
=> bootstrap 267 nand	;to configure the board for 267MHz NNAND booting

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

3 files changed, 214 insertions, 0 deletions

diff --git a/nand_spl/board/amcc/acadia/Makefile b/nand_spl/board/amcc/acadia/Makefile
new file mode 100644
index 0000000..0d6828a
--- /dev/null
+++ b/nand_spl/board/amcc/acadia/Makefile
@@ -0,0 +1,104 @@
+#
+# (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 $(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_NAND_SPL
+CFLAGS	+= -DCONFIG_NAND_SPL
+
+SOBJS	= start.o resetvec.o
+COBJS	= gpio.o nand_boot.o nand_ecc.o memory.o ndfc.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:	$(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) $$UNDEF_SYM $(__OBJS) \
+		-Map $(nandobj)u-boot-spl.map \
+		-o $(nandobj)u-boot-spl
+
+# create symbolic links for common files
+
+# from cpu directory
+$(obj)gpio.c:
+	@rm -f $(obj)gpio.c
+	ln -s $(SRCTREE)/cpu/ppc4xx/gpio.c $(obj)gpio.c
+
+$(obj)ndfc.c:
+	@rm -f $(obj)ndfc.c
+	ln -s $(SRCTREE)/cpu/ppc4xx/ndfc.c $(obj)ndfc.c
+
+$(obj)resetvec.S:
+	@rm -f $(obj)resetvec.S
+	ln -s $(SRCTREE)/cpu/ppc4xx/resetvec.S $(obj)resetvec.S
+
+$(obj)start.S:
+	@rm -f $(obj)start.S
+	ln -s $(SRCTREE)/cpu/ppc4xx/start.S $(obj)start.S
+
+# from board directory
+$(obj)memory.c:
+	@rm -f $(obj)memory.c
+	ln -s $(SRCTREE)/board/amcc/acadia/memory.c $(obj)memory.c
+
+# from nand_spl directory
+$(obj)nand_boot.c:
+	@rm -f $(obj)nand_boot.c
+	ln -s $(SRCTREE)/nand_spl/nand_boot.c $(obj)nand_boot.c
+
+# from drivers/nand directory
+$(obj)nand_ecc.c:
+	@rm -f $(obj)nand_ecc.c
+	ln -s $(SRCTREE)/drivers/nand/nand_ecc.c $(obj)nand_ecc.c
+
+#########################################################################
+
+$(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 $(obj).depend
+
+#########################################################################
diff --git a/nand_spl/board/amcc/acadia/config.mk b/nand_spl/board/amcc/acadia/config.mk
new file mode 100644
index 0000000..55069b4
--- /dev/null
+++ b/nand_spl/board/amcc/acadia/config.mk
@@ -0,0 +1,47 @@
+#
+# (C) Copyright 2007
+# Stefan Roese, DENX Software Engineering, sr@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+#
+# AMCC 405EZ Reference Platform (Acadia) board
+#
+
+#
+# TEXT_BASE for SPL:
+#
+# On 4xx platforms the SPL is located at 0xfffff000...0xffffffff,
+# in the last 4kBytes of memory space in cache.
+# We will copy this SPL into internal SRAM in start.S. So we set
+# TEXT_BASE to starting address in internal SRAM here.
+#
+TEXT_BASE = 0xF8003000
+
+# PAD_TO used to generate a 16kByte binary needed for the combined image
+# -> PAD_TO = TEXT_BASE + 0x4000
+PAD_TO	= 0xF8007000
+
+ifeq ($(debug),1)
+PLATFORM_CPPFLAGS += -DDEBUG
+endif
+
+ifeq ($(dbcr),1)
+PLATFORM_CPPFLAGS += -DCFG_INIT_DBCR=0x8cff0000
+endif
diff --git a/nand_spl/board/amcc/acadia/u-boot.lds b/nand_spl/board/amcc/acadia/u-boot.lds
new file mode 100644
index 0000000..018def1
--- /dev/null
+++ b/nand_spl/board/amcc/acadia/u-boot.lds
@@ -0,0 +1,63 @@
+/*
+ * (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
+ */
+
+OUTPUT_ARCH(powerpc:common)
+SECTIONS
+{
+  .resetvec 0xF8003FFC :
+  {
+    *(.resetvec)
+  } = 0xffff
+
+  .text      :
+  {
+    start.o	(.text)
+    nand_boot.o	(.text)
+    ndfc.o	(.text)
+
+    *(.text)
+    *(.fixup)
+  }
+  _etext = .;
+
+  .data    :
+  {
+    *(.rodata*)
+    *(.data*)
+    *(.sdata*)
+    __got2_start = .;
+    *(.got2)
+    __got2_end = .;
+  }
+
+  _edata  =  .;
+
+  __bss_start = .;
+  .bss       :
+  {
+   *(.sbss)
+   *(.bss)
+  }
+
+  _end = . ;
+}