omapimage: Add support for byteswapped SPI images

Add MLO.byteswap as a target to spl/Makefile and un-guard the first MLO
rule so we don't have to duplicate it.

Signed-off-by: Tom Rini <trini@ti.com>

diff --git a/spl/Makefile b/spl/Makefile
index 92267d6..7b52bd1 100644 (file)
--- a/spl/Makefile
+++ b/spl/Makefile
@@ -112,16 +112,13 @@ LDPPFLAGS += \
        $(shell $(LD) --version | \
          sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
 
-ifdef CONFIG_OMAP
 $(OBJTREE)/MLO:        $(obj)u-boot-spl.bin
        $(OBJTREE)/tools/mkimage -T omapimage \
                -a $(CONFIG_SPL_TEXT_BASE) -d $< $@
-endif
-ifdef CONFIG_AM33XX
-$(OBJTREE)/MLO:        $(obj)u-boot-spl.bin
-       $(OBJTREE)/tools/mkimage -T omapimage \
+
+$(OBJTREE)/MLO.byteswap: $(obj)u-boot-spl.bin
+       $(OBJTREE)/tools/mkimage -T omapimage -n byteswap \
                -a $(CONFIG_SPL_TEXT_BASE) -d $< $@
-endif
 
 ALL-y  += $(obj)u-boot-spl.bin
 

diff --git a/tools/omapimage.c b/tools/omapimage.c
index 5e739ac..d242cca 100644 (file)
--- a/tools/omapimage.c
+++ b/tools/omapimage.c
@@ -42,6 +42,18 @@
 #define OMAP_GP_HDR_SIZE (sizeof(struct gp_header))
 #define OMAP_FILE_HDR_SIZE (OMAP_CH_HDR_SIZE+OMAP_GP_HDR_SIZE)
 
+static int do_swap32 = 0;
+
+static uint32_t omapimage_swap32(uint32_t data)
+{
+       uint32_t result = 0;
+       result  = (data & 0xFF000000) >> 24;
+       result |= (data & 0x00FF0000) >> 8;
+       result |= (data & 0x0000FF00) << 8;
+       result |= (data & 0x000000FF) << 24;
+       return result;
+}
+
 static uint8_t omapimage_header[OMAP_FILE_HDR_SIZE];
 
 static int omapimage_check_image_types(uint8_t type)
@@ -80,12 +92,17 @@ static int omapimage_verify_header(unsigned char *ptr, int image_size,
 {
        struct ch_toc *toc = (struct ch_toc *)ptr;
        struct gp_header *gph = (struct gp_header *)(ptr+OMAP_CH_HDR_SIZE);
-       uint32_t offset, size;
+       uint32_t offset, size, gph_size, gph_load_addr;
 
        while (toc->section_offset != 0xffffffff
                        && toc->section_size != 0xffffffff) {
-               offset = toc->section_offset;
-               size = toc->section_size;
+               if (do_swap32) {
+                       offset = omapimage_swap32(toc->section_offset);
+                       size = omapimage_swap32(toc->section_size);
+               } else {
+                       offset = toc->section_offset;
+                       size = toc->section_size;
+               }
                if (!offset || !size)
                        return -1;
                if (offset >= OMAP_CH_HDR_SIZE ||
@@ -93,9 +110,18 @@ static int omapimage_verify_header(unsigned char *ptr, int image_size,
                        return -1;
                toc++;
        }
-       if (!valid_gph_size(gph->size))
+
+       if (do_swap32) {
+               gph_size = omapimage_swap32(gph->size);
+               gph_load_addr = omapimage_swap32(gph->load_addr);
+       } else {
+               gph_size = gph->size;
+               gph_load_addr = gph->load_addr;
+       }
+
+       if (!valid_gph_size(gph_size))
                return -1;
-       if (!valid_gph_load_addr(gph->load_addr))
+       if (!valid_gph_load_addr(gph_load_addr))
                return -1;
 
        return 0;
@@ -128,12 +154,17 @@ static void omapimage_print_header(const void *ptr)
        const struct ch_toc *toc = (struct ch_toc *)ptr;
        const struct gp_header *gph =
                        (struct gp_header *)(ptr+OMAP_CH_HDR_SIZE);
-       uint32_t offset, size;
+       uint32_t offset, size, gph_size, gph_load_addr;
 
        while (toc->section_offset != 0xffffffff
                        && toc->section_size != 0xffffffff) {
-               offset = toc->section_offset;
-               size = toc->section_size;
+               if (do_swap32) {
+                       offset = omapimage_swap32(toc->section_offset);
+                       size = omapimage_swap32(toc->section_size);
+               } else {
+                       offset = toc->section_offset;
+                       size = toc->section_size;
+               }
 
                if (offset >= OMAP_CH_HDR_SIZE ||
                    offset+size >= OMAP_CH_HDR_SIZE)
@@ -148,22 +179,26 @@ static void omapimage_print_header(const void *ptr)
                toc++;
        }
 
-       if (!valid_gph_size(gph->size)) {
-               fprintf(stderr,
-                       "Error: invalid image size %x\n",
-                       gph->size);
+       if (do_swap32) {
+               gph_size = omapimage_swap32(gph->size);
+               gph_load_addr = omapimage_swap32(gph->load_addr);
+       } else {
+               gph_size = gph->size;
+               gph_load_addr = gph->load_addr;
+       }
+
+       if (!valid_gph_size(gph_size)) {
+               fprintf(stderr, "Error: invalid image size %x\n", gph_size);
                exit(EXIT_FAILURE);
        }
 
-       if (!valid_gph_load_addr(gph->load_addr)) {
-               fprintf(stderr,
-                       "Error: invalid image load address %x\n",
-                       gph->size);
+       if (!valid_gph_load_addr(gph_load_addr)) {
+               fprintf(stderr, "Error: invalid image load address %x\n",
+                               gph_load_addr);
                exit(EXIT_FAILURE);
        }
 
-       printf("GP Header: Size %x LoadAddr %x\n",
-               gph->size, gph->load_addr);
+       printf("GP Header: Size %x LoadAddr %x\n", gph_size, gph_load_addr);
 }
 
 static int toc_offset(void *hdr, void *member)
@@ -194,6 +229,18 @@ static void omapimage_set_header(void *ptr, struct stat *sbuf, int ifd,
 
        gph->size = sbuf->st_size - OMAP_FILE_HDR_SIZE;
        gph->load_addr = params->addr;
+
+       if (strncmp(params->imagename, "byteswap", 8) == 0) {
+               do_swap32 = 1;
+               int swapped = 0;
+               uint32_t *data = (uint32_t *)ptr;
+
+               while (swapped <= (sbuf->st_size / sizeof(uint32_t))) {
+                       *data = omapimage_swap32(*data);
+                       swapped++;
+                       data++;
+               }
+       }
 }
 
 int omapimage_check_params(struct mkimage_params *params)