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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Björn Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include "ata.h"
#include "debug.h"
#include "fat.h"
#ifdef HAVE_MMC
#include "ata_mmc.h"
#endif
#include "disk.h"
/* Partition table entry layout:
-----------------------
0: 0x80 - active
1: starting head
2: starting sector
3: starting cylinder
4: partition type
5: end head
6: end sector
7: end cylinder
8-11: starting sector (LBA)
12-15: nr of sectors in partition
*/
#define BYTES2INT32(array,pos) \
((long)array[pos] | (long)(array[pos+1] << 8 ) | \
((long)array[pos+2] << 16 ) | ((long)array[pos+3] << 24 ))
static struct partinfo part[8]; /* space for 4 partitions on 2 drives */
struct partinfo* disk_init(IF_MV_NONVOID(int drive))
{
int i;
unsigned char sector[512];
#ifdef HAVE_MULTIVOLUME
/* For each drive, start at a different position, in order not to destroy
the first entry of drive 0.
That one is needed to calculate config sector position. */
struct partinfo* pinfo = &part[drive*4];
if ((size_t)drive >= sizeof(part)/sizeof(*part)/4)
return NULL; /* out of space in table */
#else
struct partinfo* pinfo = part;
#endif
ata_read_sectors(IF_MV2(drive,) 0,1,§or);
/* check that the boot sector is initialized */
if ( (sector[510] != 0x55) ||
(sector[511] != 0xaa)) {
DEBUGF("Bad boot sector signature\n");
return NULL;
}
/* parse partitions */
for ( i=0; i<4; i++ ) {
unsigned char* ptr = sector + 0x1be + 16*i;
pinfo[i].type = ptr[4];
pinfo[i].start = BYTES2INT32(ptr, 8);
pinfo[i].size = BYTES2INT32(ptr, 12);
DEBUGF("Part%d: Type %02x, start: %08lx size: %08lx\n",
i,pinfo[i].type,pinfo[i].start,pinfo[i].size);
/* extended? */
if ( pinfo[i].type == 5 ) {
/* not handled yet */
}
}
return pinfo;
}
struct partinfo* disk_partinfo(int partition)
{
return &part[partition];
}
int disk_mount_all(void)
{
struct partinfo* pinfo;
int i,j;
int mounted = 0;
bool found;
int drives = 1;
#ifdef HAVE_MMC
if (mmc_detect()) /* for Ondio, only if card detected */
{
drives = 2; /* in such case we have two drives to try */
}
#endif
fat_init(); /* reset all mounted partitions */
for (j=0; j<drives; j++)
{
found = false; /* reset partition-on-drive flag */
pinfo = disk_init(IF_MV(j));
if (pinfo == NULL)
{
continue;
}
for (i=0; mounted<NUM_VOLUMES && i<4; i++)
{
if (!fat_mount(IF_MV2(mounted,) IF_MV2(j,) pinfo[i].start))
{
mounted++;
found = true; /* at least one valid entry */
}
}
if (!found && mounted<NUM_VOLUMES) /* none of the 4 entries worked? */
{ /* try "superfloppy" mode */
DEBUGF("No partition found, trying to mount sector 0.\n");
if (!fat_mount(IF_MV2(mounted,) IF_MV2(j,) 0))
{
mounted++;
}
}
}
return mounted;
}
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