cmd_jffs2.c

	struct part_info *part;
	u8 pnum;

	if (mtdparts_init() !=0)
		return 1;

	if (argc < 2) {
		printf("no partition id specified\n");
		return 1;
	}

	if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
		return 1;

	current_dev = dev;
	current_partnum = pnum;
	current_save();

	printf("partition changed to %s%d,%d\n",
			MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);

	return 0;
}

/**
 * Routine implementing u-boot mtdparts command. Initialize/update default global
 * partition list and process user partition request (list, add, del).
 *
 * @param cmdtp command internal data
 * @param flag command flag
 * @param argc number of arguments supplied to the command
 * @param argv arguments list
 * @return 0 on success, 1 otherwise
 */
int do_jffs2_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	if (argc == 2) {
		if (strcmp(argv[1], "default") == 0) {
			setenv("mtdids", (char *)mtdids_default);
			setenv("mtdparts", (char *)mtdparts_default);
			setenv("partition", NULL);

			mtdparts_init();
			return 0;
		} else if (strcmp(argv[1], "delall") == 0) {
			/* this may be the first run, initialize lists if needed */
			mtdparts_init();

			setenv("mtdparts", NULL);

			/* devices_init() calls current_save() */
			return devices_init();
		}
	}

	/* make sure we are in sync with env variables */
	if (mtdparts_init() != 0)
		return 1;

	if (argc == 1) {
		list_partitions();
		return 0;
	}

	/* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
	if (((argc == 5) || (argc == 6)) && (strcmp(argv[1], "add") == 0)) {
#define PART_ADD_DESC_MAXLEN 64
		char tmpbuf[PART_ADD_DESC_MAXLEN];
		u8 type, num, len;
		struct mtd_device *dev;
		struct mtd_device *dev_tmp;
		struct mtdids *id;
		struct part_info *p;

		if (id_parse(argv[2], NULL, &type, &num) != 0)
			return 1;

		if ((id = id_find(type, num)) == NULL) {
			printf("no such device %s defined in mtdids variable\n", argv[2]);
			return 1;
		}

		len = strlen(id->mtd_id) + 1;	/* 'mtd_id:' */
		len += strlen(argv[3]);		/* size@offset */
		len += strlen(argv[4]) + 2;	/* '(' name ')' */
		if (argv[5] && (strlen(argv[5]) == 2))
			len += 2;		/* 'ro' */

		if (len >= PART_ADD_DESC_MAXLEN) {
			printf("too long partition description\n");
			return 1;
		}
		sprintf(tmpbuf, "%s:%s(%s)%s",
				id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
		DEBUGF("add tmpbuf: %s\n", tmpbuf);

		if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
			return 1;

		DEBUGF("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
				dev->id->num, dev->id->mtd_id);

		if ((dev_tmp = device_find(dev->id->type, dev->id->num)) == NULL) {
			device_add(dev);
		} else {
			/* merge new partition with existing ones*/
			p = list_entry(dev->parts.next, struct part_info, link);
			if (part_add(dev_tmp, p) != 0) {
				device_del(dev);
				return 1;
			}
		}

		if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
			printf("generated mtdparts too long, reseting to null\n");
			return 1;
		}

		return 0;
	}

	/* mtdparts del part-id */
	if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
		DEBUGF("del: part-id = %s\n", argv[2]);

		return delete_partition(argv[2]);
	}

	printf ("Usage:\n%s\n", cmdtp->usage);
	return 1;
}
#endif /* #ifdef CONFIG_JFFS2_CMDLINE */

/***************************************************/
U_BOOT_CMD(
	fsload,	3,	0,	do_jffs2_fsload,
	"fsload\t- load binary file from a filesystem image\n",
	"[ off ] [ filename ]\n"
	"    - load binary file from flash bank\n"
	"      with offset 'off'\n"
);
U_BOOT_CMD(
	ls,	2,	1,	do_jffs2_ls,
	"ls\t- list files in a directory (default /)\n",
	"[ directory ]\n"
	"    - list files in a directory.\n"
);

U_BOOT_CMD(
	fsinfo,	1,	1,	do_jffs2_fsinfo,
	"fsinfo\t- print information about filesystems\n",
	"    - print information about filesystems\n"
);

#ifdef CONFIG_JFFS2_CMDLINE
U_BOOT_CMD(
	chpart,	2,	0,	do_jffs2_chpart,
	"chpart\t- change active partition\n",
	"part-id\n"
	"    - change active partition (e.g. part-id = nand0,1)\n"
);

U_BOOT_CMD(
	mtdparts,	6,	0,	do_jffs2_mtdparts,
	"mtdparts- define flash/nand partitions\n",
	"\n"
	"    - list partition table\n"
	"mtdparts delall\n"
	"    - delete all partitions\n"
	"mtdparts del part-id\n"
	"    - delete partition (e.g. part-id = nand0,1)\n"
	"mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
	"    - add partition\n"
	"mtdparts default\n"
	"    - reset partition table to defaults\n\n"
	"-----\n\n"
	"this command uses three environment variables:\n\n"
	"'partition' - keeps current partition identifier\n\n"
	"partition  := <part-id>\n"
	"<part-id>  := <dev-id>,part_num\n\n"
	"'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
	"mtdids=<idmap>[,<idmap>,...]\n\n"
	"<idmap>    := <dev-id>=<mtd-id>\n"
	"<dev-id>   := 'nand'|'nor'<dev-num>\n"
	"<dev-num>  := mtd device number, 0...\n"
	"<mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
	"'mtdparts' - partition list\n\n"
	"mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
	"<mtd-def>  := <mtd-id>:<part-def>[,<part-def>...]\n"
	"<mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
	"<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
	"<size>     := standard linux memsize OR '-' to denote all remaining space\n"
	"<offset>   := partition start offset within the device\n"
	"<name>     := '(' NAME ')'\n"
	"<ro-flag>  := when set to 'ro' makes partition read-only (not used, passed to kernel)\n"
);
#endif /* #ifdef CONFIG_JFFS2_CMDLINE */

/***************************************************/