cmd_jffs2.c

u-boot-1.1.6 源码包

		if (parse_mtdparts(parts) != 0)
			return 1;

		if (list_empty(&devices)) {
			printf("mtdparts_init: no valid partitions\n");
			return 1;
		}

		/* ok it's good, save new parts */
		strncpy(last_parts, parts, MTDPARTS_MAXLEN);

		/* reset first partition from first dev from the list as current */
		current_dev = list_entry(devices.next, struct mtd_device, link);
		current_partnum = 0;
		current_save();

		DEBUGF("mtdparts_init: current_dev  = %s%d, current_partnum = %d\n",
				MTD_DEV_TYPE(current_dev->id->type),
				current_dev->id->num, current_partnum);
	}

	/* mtdparts variable was reset to NULL, delete all devices/partitions */
	if (!parts && (last_parts[0] != '\0'))
		return devices_init();

	/* do not process current partition if mtdparts variable is null */
	if (!parts)
		return 0;

	/* is current partition set in environment? if so, use it */
	if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
		struct part_info *p;
		struct mtd_device *cdev;
		u8 pnum;

		DEBUGF("--- getting current partition: %s\n", tmp_ep);

		if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
			current_dev = cdev;
			current_partnum = pnum;
			current_save();
		}
	} else if (getenv("partition") == NULL) {
		DEBUGF("no partition variable set, setting...\n");
		current_save();
	}

	return 0;
}
#else /* #ifdef CONFIG_JFFS2_CMDLINE */
/*
 * 'Static' version of command line mtdparts_init() routine. Single partition on
 * a single device configuration.
 */

/**
 * Parse and initialize global mtdids mapping and create global
 * device/partition list.
 *
 * @return 0 on success, 1 otherwise
 */
int mtdparts_init(void)
{
	static int initialized = 0;
	u32 size;
	char *dev_name;

	DEBUGF("\n---mtdparts_init---\n");
	if (!initialized) {
		struct mtdids *id;
		struct part_info *part;

		initialized = 1;
		current_dev = (struct mtd_device *)
			malloc(sizeof(struct mtd_device) +
					sizeof(struct part_info) +
					sizeof(struct mtdids));
		if (!current_dev) {
			printf("out of memory\n");
			return 1;
		}
		memset(current_dev, 0, sizeof(struct mtd_device) +
					sizeof(struct part_info) + sizeof(struct mtdids));

		id = (struct mtdids *)(current_dev + 1);
		part = (struct part_info *)(id + 1);

		/* id */
		id->mtd_id = "single part";

#if defined(CONFIG_JFFS2_DEV)
		dev_name = CONFIG_JFFS2_DEV;
#else
		dev_name = "nor0";
#endif

		if ((id_parse(dev_name, NULL, &id->type, &id->num) != 0) ||
				(device_validate(id->type, id->num, &size) != 0)) {
			printf("incorrect device: %s%d\n", MTD_DEV_TYPE(id->type), id->num);
			free(current_dev);
			return 1;
		}
		id->size = size;
		INIT_LIST_HEAD(&id->link);

		DEBUGF("dev id: type = %d, num = %d, size = 0x%08lx, mtd_id = %s\n",
				id->type, id->num, id->size, id->mtd_id);

		/* partition */
		part->name = "static";
		part->auto_name = 0;

#if defined(CONFIG_JFFS2_PART_SIZE)
		part->size = CONFIG_JFFS2_PART_SIZE;
#else
		part->size = SIZE_REMAINING;
#endif

#if defined(CONFIG_JFFS2_PART_OFFSET)
		part->offset = CONFIG_JFFS2_PART_OFFSET;
#else
		part->offset = 0x00000000;
#endif

		part->dev = current_dev;
		INIT_LIST_HEAD(&part->link);

		/* recalculate size if needed */
		if (part->size == SIZE_REMAINING)
			part->size = id->size - part->offset;

		DEBUGF("part  : name = %s, size = 0x%08lx, offset = 0x%08lx\n",
				part->name, part->size, part->offset);

		/* device */
		current_dev->id = id;
		INIT_LIST_HEAD(&current_dev->link);
		current_dev->num_parts = 1;
		INIT_LIST_HEAD(&current_dev->parts);
		list_add(&part->link, &current_dev->parts);
	}

	return 0;
}
#endif /* #ifdef CONFIG_JFFS2_CMDLINE */

/**
 * Return pointer to the partition of a requested number from a requested
 * device.
 *
 * @param dev device that is to be searched for a partition
 * @param part_num requested partition number
 * @return pointer to the part_info, NULL otherwise
 */
static struct part_info* jffs2_part_info(struct mtd_device *dev, unsigned int part_num)
{
	struct list_head *entry;
	struct part_info *part;
	int num;

	if (!dev)
		return NULL;

	DEBUGF("\n--- jffs2_part_info: partition number %d for device %s%d (%s)\n",
			part_num, MTD_DEV_TYPE(dev->id->type),
			dev->id->num, dev->id->mtd_id);

	if (part_num >= dev->num_parts) {
		printf("invalid partition number %d for device %s%d (%s)\n",
				part_num, MTD_DEV_TYPE(dev->id->type),
				dev->id->num, dev->id->mtd_id);
		return NULL;
	}

	/* locate partition number, return it */
	num = 0;
	list_for_each(entry, &dev->parts) {
		part = list_entry(entry, struct part_info, link);

		if (part_num == num++) {
			return part;
		}
	}

	return NULL;
}

/***************************************************/
/* U-boot commands				   */
/***************************************************/

/**
 * Routine implementing fsload u-boot command. This routine tries to load
 * a requested file from jffs2/cramfs filesystem on a current partition.
 *
 * @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_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	char *fsname;
	char *filename;
	int size;
	struct part_info *part;
	ulong offset = load_addr;

	/* pre-set Boot file name */
	if ((filename = getenv("bootfile")) == NULL) {
		filename = "uImage";
	}

	if (argc == 2) {
		filename = argv[1];
	}
	if (argc == 3) {
		offset = simple_strtoul(argv[1], NULL, 16);
		load_addr = offset;
		filename = argv[2];
	}

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

	if ((part = jffs2_part_info(current_dev, current_partnum))){

		/* check partition type for cramfs */
		fsname = (cramfs_check(part) ? "CRAMFS" : "JFFS2");
		printf("### %s loading '%s' to 0x%lx\n", fsname, filename, offset);

		if (cramfs_check(part)) {
			size = cramfs_load ((char *) offset, part, filename);
		} else {
			/* if this is not cramfs assume jffs2 */
			size = jffs2_1pass_load((char *)offset, part, filename);
		}

		if (size > 0) {
			char buf[10];
			printf("### %s load complete: %d bytes loaded to 0x%lx\n",
				fsname, size, offset);
			sprintf(buf, "%x", size);
			setenv("filesize", buf);
		} else {
			printf("### %s LOAD ERROR<%x> for %s!\n", fsname, size, filename);
		}

		return !(size > 0);
	}
	return 1;
}

/**
 * Routine implementing u-boot ls command which lists content of a given
 * directory on a current partition.
 *
 * @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_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	char *filename = "/";
	int ret;
	struct part_info *part;

	if (argc == 2)
		filename = argv[1];

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

	if ((part = jffs2_part_info(current_dev, current_partnum))){

		/* check partition type for cramfs */
		if (cramfs_check(part)) {
			ret = cramfs_ls (part, filename);
		} else {
			/* if this is not cramfs assume jffs2 */
			ret = jffs2_1pass_ls(part, filename);
		}

		return ret ? 0 : 1;
	}
	return 1;
}

/**
 * Routine implementing u-boot fsinfo command. This routine prints out
 * miscellaneous filesystem informations/statistics.
 *
 * @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_fsinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	struct part_info *part;
	char *fsname;
	int ret;

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

	if ((part = jffs2_part_info(current_dev, current_partnum))){

		/* check partition type for cramfs */
		fsname = (cramfs_check(part) ? "CRAMFS" : "JFFS2");
		printf("### filesystem type is %s\n", fsname);

		if (cramfs_check(part)) {
			ret = cramfs_info (part);
		} else {
			/* if this is not cramfs assume jffs2 */
			ret = jffs2_1pass_info(part);
		}

		return ret ? 0 : 1;
	}
	return 1;
}

/* command line only */
#ifdef CONFIG_JFFS2_CMDLINE
/**
 * Routine implementing u-boot chpart command. Sets new current partition based
 * on the user supplied partition id. For partition id format see find_dev_and_part().
 *
 * @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_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
/* command line only */
	struct mtd_device *dev;
	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 */

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

#endif /* CFG_CMD_JFFS2 */