Logic unit:
Purpose: Add support for bare partitions (no partition table)
Author: Antnoio R. Costa <antonio.costa <at> atmel.com>
Date : 11 Jun 2008
Status:
~~~~~~
Some SD cards are not formatted with a partition table but with
just a bare partition at the beginnig of the memory.
I modified get_partition_info_extended to call test_block_type
as done by print_partition_extended. In this way bare FAT partitions
are recognised. Now we need a test for Ext2.
Signed-off-by: Antonio R. Costa <[EMAIL PROTECTED]>
diff --git a/disk/part_dos.c b/disk/part_dos.c
index 4d778ec..e5cc8aa 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -1,4 +1,7 @@
/*
+ * (C) Copyright 2008 Atmel Corp.
+ * Antonio R. Costa <antonio.costa <at> atmel.com>
+ * <costa.antonior <at> gmail.com>
* (C) Copyright 2001
* Raymond Lo, [EMAIL PROTECTED]
* Wolfgang Denk, DENX Software Engineering, [EMAIL PROTECTED]
@@ -53,6 +56,11 @@ static inline int le32_to_int(unsigned char *le32)
);
}
+static inline int le16_to_int(unsigned char *le16)
+{
+ return ((le16[1] << 8) + le16[0]);
+}
+
static inline int is_extended(int part_type)
{
return (part_type == 0x5 ||
@@ -166,12 +174,20 @@ static int get_partition_info_extended (block_dev_desc_t
*dev_desc, int ext_part
unsigned char buffer[DEFAULT_SECTOR_SIZE];
dos_partition_t *pt;
int i;
-
+
if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *)
buffer) != 1) {
printf ("** Can't read partition table on %d:%d **\n",
dev_desc->dev, ext_part_sector);
return -1;
}
+
+/*
+ * ARC: This check is bad:
+ * unfortunately both MBR and FAT bootsector
+ * have a sign 0x55aa @ 0x1FF
+ * I replaced it by test_block_type as in
+ * print_partition_extended
+
if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
printf ("bad MBR sector signature 0x%02x%02x\n",
@@ -179,7 +195,19 @@ static int get_partition_info_extended (block_dev_desc_t
*dev_desc, int ext_part
buffer[DOS_PART_MAGIC_OFFSET + 1]);
return -1;
}
-
+*/
+ i=test_block_type(buffer);
+
+ if(i==-1) {
+ printf ("bad MBR sector signature 0x%02x%02x\n",
+ buffer[DOS_PART_MAGIC_OFFSET],
+ buffer[DOS_PART_MAGIC_OFFSET + 1]);
+ return -1;
+ }
+
+ if(i==DOS_PBR)
+ return -1;
+
/* Print all primary/logical partitions */
pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
for (i = 0; i < 4; i++, pt++) {
@@ -193,6 +221,7 @@ static int get_partition_info_extended (block_dev_desc_t
*dev_desc, int ext_part
info->blksz = 512;
info->start = ext_part_sector + le32_to_int
(pt->start4);
info->size = le32_to_int (pt->size4);
+
switch(dev_desc->if_type) {
case IF_TYPE_IDE:
case IF_TYPE_SATA:
@@ -208,6 +237,13 @@ static int get_partition_info_extended (block_dev_desc_t
*dev_desc, int ext_part
case IF_TYPE_DOC:
sprintf ((char *)info->name,
"docd%c%d\n", 'a' + dev_desc->dev, part_num);
break;
+ case IF_TYPE_MMC:
+ sprintf ((char *)info->name,
"mmc%c%d\n", 'a' + dev_desc->dev, part_num);
+ break;
+ case IF_TYPE_SD:
+ case IF_TYPE_SDHC:
+ sprintf ((char *)info->name,
"sd%c%d\n", 'a' + dev_desc->dev, part_num);
+ break;
default:
sprintf ((char *)info->name,
"xx%c%d\n", 'a' + dev_desc->dev, part_num);
break;
--
1.5.4.3
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