cmd: fat: add offset parameter to fatwrite

In this patch, fatwrite command is extended so as to accept an additional
parameter of file offset.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/cmd/fat.c b/cmd/fat.c
index 03de5d1..2a5f7bf 100644 (file)
--- a/cmd/fat.c
+++ b/cmd/fat.c
@@ -104,6 +104,7 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
        int ret;
        unsigned long addr;
        unsigned long count;
+       long offset;
        struct blk_desc *dev_desc = NULL;
        disk_partition_t info;
        int dev = 0;
@@ -126,9 +127,11 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
        }
        addr = simple_strtoul(argv[3], NULL, 16);
        count = (argc <= 5) ? 0 : simple_strtoul(argv[5], NULL, 16);
+       /* offset should be a hex, but "-1" is allowed */
+       offset = (argc <= 6) ? 0 : simple_strtol(argv[6], NULL, 16);
 
        buf = map_sysmem(addr, count);
-       ret = file_fat_write(argv[4], buf, 0, count, &size);
+       ret = file_fat_write(argv[4], buf, offset, count, &size);
        unmap_sysmem(buf);
        if (ret < 0) {
                printf("\n** Unable to write \"%s\" from %s %d:%d **\n",
@@ -142,9 +145,9 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
 }
 
 U_BOOT_CMD(
-       fatwrite,       6,      0,      do_fat_fswrite,
+       fatwrite,       7,      0,      do_fat_fswrite,
        "write file into a dos filesystem",
-       "<interface> <dev[:part]> <addr> <filename> [<bytes>]\n"
+       "<interface> <dev[:part]> <addr> <filename> [<bytes> [<offset>]]\n"
        "    - write file 'filename' from the address 'addr' in RAM\n"
        "      to 'dev' on 'interface'"
 );