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filetype: add fat filesystem support 

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2012-08-12 18:51:07 +08:00 committed by Sascha Hauer
parent a1b1aec6af
commit 653c767213
2 changed files with 21 additions and 0 deletions
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20
common/filetype.c
View File

@ -22,6 +22,7 @@
#include <common.h> #include <common.h>
#include <filetype.h> #include <filetype.h>
#include <asm/byteorder.h> #include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <fcntl.h> #include <fcntl.h>
#include <fs.h> #include <fs.h>
#include <malloc.h> #include <malloc.h>
@ -40,6 +41,7 @@ static const char *filetype_str[] = {
[filetype_aimage] = "Android boot image", [filetype_aimage] = "Android boot image",
[filetype_sh] = "Bourne Shell", [filetype_sh] = "Bourne Shell",
[filetype_mips_barebox] = "MIPS barebox image", [filetype_mips_barebox] = "MIPS barebox image",
[filetype_fat] = "FAT filesytem",
}; };
const char *file_type_to_string(enum filetype f) const char *file_type_to_string(enum filetype f)
@ -50,6 +52,22 @@ const char *file_type_to_string(enum filetype f)
return NULL; 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) enum filetype file_detect_type(void *_buf)
{ {
u32 *buf = _buf; u32 *buf = _buf;
@ -81,6 +99,8 @@ enum filetype file_detect_type(void *_buf)
return filetype_aimage; return filetype_aimage;
if (strncmp(buf8 + 0x10, "barebox", 7) == 0) if (strncmp(buf8 + 0x10, "barebox", 7) == 0)
return filetype_mips_barebox; return filetype_mips_barebox;
if (is_fat(buf8))
return filetype_fat;
return filetype_unknown; return filetype_unknown;
} }

1
include/filetype.h
View File

@ -18,6 +18,7 @@ enum filetype {
filetype_aimage, filetype_aimage,
filetype_sh, filetype_sh,
filetype_mips_barebox, filetype_mips_barebox,
filetype_fat,
}; };
const char *file_type_to_string(enum filetype f); const char *file_type_to_string(enum filetype f);