Booting from SPI on an AM35xx (and possibly other TI SOCs) requires
a special format:
- 32 bit image size in big-endian
- 32 bit load address in big-endian
- binary image converted from little- to big-endian
The mk-am35xx-spi-image tool converts barebox.bin to
this format.
Signed-off-by: Jan Luebbe <jlu@xxxxxxxxxxxxxx>
---
arch/arm/Makefile | 8 +++
arch/arm/mach-omap/Kconfig | 7 +++
scripts/.gitignore | 5 +-
scripts/Makefile | 2 +-
scripts/mk-am35xx-spi-image.c | 126 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 145 insertions(+), 3 deletions(-)
create mode 100644 scripts/mk-am35xx-spi-image.c
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 1225df7..c2eb598 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -186,6 +186,14 @@ endif
all: $(KBUILD_IMAGE)
+barebox.spi: barebox.bin
+ @echo " SPI " $@
+ $(Q)scripts/mk-am35xx-spi-image barebox.bin > barebox.spi
+
+ifeq ($(CONFIG_OMAP_BUILD_SPI),y)
+all: barebox.spi
+endif
+
archprepare: maketools
maketools:
$(Q)$(MAKE) $(build)=arch/arm/tools include/generated/mach-types.h
diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
index 386c484..aa9ab8c 100644
--- a/arch/arm/mach-omap/Kconfig
+++ b/arch/arm/mach-omap/Kconfig
@@ -91,6 +91,13 @@ config OMAP_BUILD_IFT
prompt "build ift binary"
bool
+config OMAP_BUILD_SPI
+ prompt "build SPI binary"
+ bool
+ help
+ Say Y here if you want to build an barebox.spi image as used
+ on the AM35xx chips when booting form SPI NOR flash.
+
config ARCH_TEXT_BASE
hex
default 0x80e80000 if MACH_OMAP343xSDP
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 11fd2df..8772205 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -1,6 +1,7 @@
bareboxenv
bin2c
-mkimage
-kallsyms
gen_netx_image
+kallsyms
+mk-am35xx-spi-image
+mkimage
omap_signGP
diff --git a/scripts/Makefile b/scripts/Makefile
index 784d205..9b6b628 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -9,7 +9,7 @@ hostprogs-y += bin2c
hostprogs-y += mkimage
hostprogs-y += bareboxenv
hostprogs-$(CONFIG_ARCH_NETX) += gen_netx_image
-hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP
+hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP mk-am35xx-spi-image
hostprogs-$(CONFIG_ARCH_S5PCxx) += s5p_cksum
always := $(hostprogs-y) $(hostprogs-m)
diff --git a/scripts/mk-am35xx-spi-image.c b/scripts/mk-am35xx-spi-image.c
new file mode 100644
index 0000000..133f2b7
--- /dev/null
+++ b/scripts/mk-am35xx-spi-image.c
@@ -0,0 +1,126 @@
+/*
+ * mkublheader.c - produce the header needed to load barebox on OMAP-L138
+ *
+ * Copyright (C) 2012 Jan Luebbe <j.luebbe@xxxxxxxxxxxxxx>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _BSD_SOURCE
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <endian.h>
+
+void usage(char *prgname)
+{
+ printf("usage: %s [OPTION] FILE > IMAGE\n"
+ "\n"
+ "options:\n"
+ " -a <address> memory address for the loaded image in SRAM\n",
+ prgname);
+}
+
+int main(int argc, char *argv[])
+{
+ FILE *input;
+ int opt;
+ off_t pos;
+ size_t size;
+ uint32_t addr = 0x40200000;
+ uint32_t temp;
+
+ while((opt = getopt(argc, argv, "a:")) != -1) {
+ switch (opt) {
+ case 'a':
+ addr = strtoul(optarg, NULL, 0);
+ break;
+ }
+ }
+
+ if (optind >= argc) {
+ usage(argv[0]);
+ exit(1);
+ }
+
+ input = fopen(argv[optind], "r");
+ if (input == NULL) {
+ perror("fopen");
+ exit(EXIT_FAILURE);
+ }
+
+ if (fseeko(input, 0, SEEK_END) == -1) {
+ perror("fseeko");
+ exit(EXIT_FAILURE);
+ }
+
+ pos = ftello(input);
+ if (pos == -1) {
+ perror("ftello");
+ exit(EXIT_FAILURE);
+ }
+ if (pos % 4) {
+ printf("error: image size must be a multiple of 4 bytes\n");
+ exit(EXIT_FAILURE);
+ }
+ if (pos > 0x100000) {
+ printf("error: image should be smaller than 1 MiB\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (fseeko(input, 0, SEEK_SET) == -1) {
+ perror("fseeko");
+ exit(EXIT_FAILURE);
+ }
+
+ /* image size */
+ temp = htobe32((uint32_t)pos);
+ fwrite(&temp, sizeof(uint32_t), 1, stdout);
+
+ /* memory address */
+ temp = htobe32(addr);
+ fwrite(&temp, sizeof(uint32_t), 1, stdout);
+
+ for (;;) {
+ size = fread(&temp, 1, sizeof(uint32_t), input);
+ if (!size)
+ break;
+ if (size != 4) {
+ perror("fread");
+ exit(EXIT_FAILURE);
+ }
+ temp = htobe32(le32toh(temp));
+ if (fwrite(&temp, 1, sizeof(uint32_t), stdout) != 4) {
+ perror("fwrite");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if (fclose(input) != 0) {
+ perror("fclose");
+ exit(EXIT_FAILURE);
+ }
+
+ exit(EXIT_SUCCESS);
+}
--
1.7.10.4
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