diff options
Diffstat (limited to 'common/cmd_fat.c')
| -rw-r--r-- | common/cmd_fat.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/common/cmd_fat.c b/common/cmd_fat.c new file mode 100644 index 0000000..4db70e1 --- /dev/null +++ b/common/cmd_fat.c @@ -0,0 +1,231 @@ +/* + * (C) Copyright 2002 + * Richard Jones, rjones@nexus-tech.net + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* + * Boot support + */ +#include <common.h> +#include <command.h> +#include <cmd_boot.h> +#include <cmd_autoscript.h> +#include <s_record.h> +#include <net.h> +#include <ata.h> + +#if (CONFIG_COMMANDS & CFG_CMD_FAT) + +#undef DEBUG + +#include <fat.h> + +extern block_dev_desc_t *ide_get_dev (int dev); + +int do_fat_fsload (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + long size; + unsigned long offset; + unsigned long count; + + if (argc < 3) { + printf ("usage:fatload <filename> <addr> [bytes]\n"); + return (0); + } + + offset = simple_strtoul (argv[2], NULL, 16); + if (argc == 4) + count = simple_strtoul (argv[3], NULL, 16); + else + count = 0; + + size = file_fat_read (argv[1], (unsigned char *) offset, count); + + printf ("%ld bytes read\n", size); + + return size; +} + +int do_fat_ls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + char *filename = "/"; + int ret; + + if (argc == 2) + ret = file_fat_ls (argv[1]); + else + ret = file_fat_ls (filename); + + return (ret); +} + +int do_fat_fsinfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + int ret; + + ret = 0; + + printf ("FAT info: %d\n", file_fat_detectfs ()); + + return (ret); +} + +#ifdef NOT_IMPLEMENTED_YET +/* find first device whose first partition is a DOS filesystem */ +int find_fat_partition (void) +{ + int i, j; + block_dev_desc_t *dev_desc; + unsigned char *part_table; + unsigned char buffer[ATA_BLOCKSIZE]; + + for (i = 0; i < CFG_IDE_MAXDEVICE; i++) { + dev_desc = ide_get_dev (i); + if (!dev_desc) { + debug ("couldn't get ide device!\n"); + return (-1); + } + if (dev_desc->part_type == PART_TYPE_DOS) { + if (dev_desc-> + block_read (dev_desc->dev, 0, 1, (ulong *) buffer) != 1) { + debug ("can't perform block_read!\n"); + return (-1); + } + part_table = &buffer[0x1be]; /* start with partition #4 */ + for (j = 0; j < 4; j++) { + if ((part_table[4] == 1 || /* 12-bit FAT */ + part_table[4] == 4 || /* 16-bit FAT */ + part_table[4] == 6) && /* > 32Meg part */ + part_table[0] == 0x80) { /* bootable? */ + curr_dev = i; + part_offset = part_table[11]; + part_offset <<= 8; + part_offset |= part_table[10]; + part_offset <<= 8; + part_offset |= part_table[9]; + part_offset <<= 8; + part_offset |= part_table[8]; + debug ("found partition start at %ld\n", part_offset); + return (0); + } + part_table += 16; + } + } + } + + debug ("no valid devices found!\n"); + return (-1); +} + +int +do_fat_dump (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]) +{ + __u8 block[1024]; + int ret; + int bknum; + + ret = 0; + + if (argc != 2) { + printf ("needs an argument!\n"); + return (0); + } + + bknum = simple_strtoul (argv[1], NULL, 10); + + if (disk_read (0, bknum, block) != 0) { + printf ("Error: reading block\n"); + return -1; + } + printf ("FAT dump: %d\n", bknum); + hexdump (512, block); + + return (ret); +} + +int disk_read (__u32 startblock, __u32 getsize, __u8 *bufptr) +{ + ulong tot; + block_dev_desc_t *dev_desc; + + if (curr_dev < 0) { + if (find_fat_partition () != 0) + return (-1); + } + + dev_desc = ide_get_dev (curr_dev); + if (!dev_desc) { + debug ("couldn't get ide device\n"); + return (-1); + } + + tot = dev_desc->block_read (0, startblock + part_offset, + getsize, (ulong *) bufptr); + + /* should we do this here? + flush_cache ((ulong)buf, cnt*ide_dev_desc[device].blksz); + */ + + if (tot == getsize) + return (0); + + debug ("unable to read from device!\n"); + + return (-1); +} + + +static int isprint (unsigned char ch) +{ + if (ch >= 32 && ch < 127) + return (1); + + return (0); +} + + +void hexdump (int cnt, unsigned char *data) +{ + int i; + int run; + int offset; + + offset = 0; + while (cnt) { + printf ("%04X : ", offset); + if (cnt >= 16) + run = 16; + else + run = cnt; + cnt -= run; + for (i = 0; i < run; i++) + printf ("%02X ", (unsigned int) data[i]); + printf (": "); + for (i = 0; i < run; i++) + printf ("%c", isprint (data[i]) ? data[i] : '.'); + printf ("\n"); + data = &data[16]; + offset += run; + } +} +#endif /* NOT_IMPLEMENTED_YET */ + +#endif /* CFG_CMD_FAT */ |