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authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2012-08-12 18:51:07 +0800
committerSascha Hauer <s.hauer@pengutronix.de>2012-09-04 09:08:39 +0200
commit653c767213f6ae597a816a84fd3332718e0b82f3 (patch)
treeb824ab54a62ebdb574b224957b96a43663e4961a /common/filetype.c
parenta1b1aec6afa625451f531e0b870c8206a3841f69 (diff)
downloadbarebox-653c767213f6ae597a816a84fd3332718e0b82f3.tar.gz
filetype: add fat filesystem support
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'common/filetype.c')
-rw-r--r--common/filetype.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/common/filetype.c b/common/filetype.c
index 1a5b82d..e736d43 100644
--- a/common/filetype.c
+++ b/common/filetype.c
@@ -22,6 +22,7 @@
#include <common.h>
#include <filetype.h>
#include <asm/byteorder.h>
+#include <asm/unaligned.h>
#include <fcntl.h>
#include <fs.h>
#include <malloc.h>
@@ -40,6 +41,7 @@ static const char *filetype_str[] = {
[filetype_aimage] = "Android boot image",
[filetype_sh] = "Bourne Shell",
[filetype_mips_barebox] = "MIPS barebox image",
+ [filetype_fat] = "FAT filesytem",
};
const char *file_type_to_string(enum filetype f)
@@ -50,6 +52,22 @@ const char *file_type_to_string(enum filetype f)
return NULL;
}
+static int is_fat(u8 *buf)
+{
+ if (get_unaligned_le16(&buf[510]) != 0xAA55)
+ return 0;
+
+ /* FAT */
+ if ((get_unaligned_le32(&buf[54]) & 0xFFFFFF) == 0x544146)
+ return 1;
+
+ /* FAT32 */
+ if ((get_unaligned_le32(&buf[82]) & 0xFFFFFF) == 0x544146)
+ return 1;
+
+ return 0;
+}
+
enum filetype file_detect_type(void *_buf)
{
u32 *buf = _buf;
@@ -81,6 +99,8 @@ enum filetype file_detect_type(void *_buf)
return filetype_aimage;
if (strncmp(buf8 + 0x10, "barebox", 7) == 0)
return filetype_mips_barebox;
+ if (is_fat(buf8))
+ return filetype_fat;
return filetype_unknown;
}