mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 22:33:18 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Stäubli Faverges - <www.staubli.com>
|
|
* Pierre AUBERT p.aubert@staubli.com
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <malloc.h>
|
|
|
|
#include "dos.h"
|
|
#include "fdos.h"
|
|
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
* fill_fs -- Read info on file system
|
|
*-----------------------------------------------------------------------------
|
|
*/
|
|
static int fill_fs (BootSector_t *boot, Fs_t *fs)
|
|
{
|
|
|
|
fs -> fat_start = __le16_to_cpu (boot -> nrsvsect);
|
|
fs -> fat_len = __le16_to_cpu (boot -> fatlen);
|
|
fs -> nb_fat = boot -> nfat;
|
|
|
|
fs -> dir_start = fs -> fat_start + fs -> nb_fat * fs -> fat_len;
|
|
fs -> dir_len = __le16_to_cpu (boot -> dirents) * MDIR_SIZE / SZ_STD_SECTOR;
|
|
fs -> cluster_size = boot -> clsiz;
|
|
fs -> num_clus = (fs -> tot_sectors - fs -> dir_start - fs -> dir_len) / fs -> cluster_size;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
* fs_init --
|
|
*-----------------------------------------------------------------------------
|
|
*/
|
|
int fs_init (Fs_t *fs)
|
|
{
|
|
BootSector_t *boot;
|
|
|
|
/* Initialize physical device */
|
|
if (dev_open () < 0) {
|
|
PRINTF ("Unable to initialize the fdc\n");
|
|
return (-1);
|
|
}
|
|
init_subdir ();
|
|
|
|
/* Allocate space for read the boot sector */
|
|
if ((boot = (BootSector_t *)malloc (sizeof (BootSector_t))) == NULL) {
|
|
PRINTF ("Unable to allocate space for boot sector\n");
|
|
return (-1);
|
|
}
|
|
|
|
/* read boot sector */
|
|
if (dev_read (boot, 0, 1)){
|
|
PRINTF ("Error during boot sector read\n");
|
|
free (boot);
|
|
return (-1);
|
|
}
|
|
|
|
/* we verify it'a a DOS diskette */
|
|
if (boot -> jump [0] != JUMP_0_1 && boot -> jump [0] != JUMP_0_2) {
|
|
PRINTF ("Not a DOS diskette\n");
|
|
free (boot);
|
|
return (-1);
|
|
}
|
|
|
|
if (boot -> descr < MEDIA_STD) {
|
|
/* We handle only recent medias (type F0) */
|
|
PRINTF ("unrecognized diskette type\n");
|
|
free (boot);
|
|
return (-1);
|
|
}
|
|
|
|
if (check_dev (boot, fs) < 0) {
|
|
PRINTF ("Bad diskette\n");
|
|
free (boot);
|
|
return (-1);
|
|
}
|
|
|
|
if (fill_fs (boot, fs) < 0) {
|
|
free (boot);
|
|
|
|
return (-1);
|
|
}
|
|
|
|
/* Read FAT */
|
|
if (read_fat (boot, fs) < 0) {
|
|
free (boot);
|
|
return (-1);
|
|
}
|
|
|
|
free (boot);
|
|
return (0);
|
|
}
|