/*
 * oftree.c - device tree command support
 *
 * Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
 *
 * based on U-Boot code by:
 *
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
 * Pantelis Antoniou <pantelis.antoniou@gmail.com> and
 * Matthew McClintock <msm@freescale.com>
 *
 * 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 version 2
 * as published by the Free Software Foundation.
 *
 * 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
 */

#include <common.h>
#include <environment.h>
#include <fdt.h>
#include <of.h>
#include <command.h>
#include <fs.h>
#include <malloc.h>
#include <libfdt.h>
#include <linux/ctype.h>
#include <asm/byteorder.h>
#include <errno.h>
#include <getopt.h>
#include <init.h>

static int do_oftree(struct command *cmdtp, int argc, char *argv[])
{
	struct fdt_header *fdt;
	int size;
	int opt;
	char *file = NULL;
	const char *node = "/";
	int dump = 0;
	int parse = 0;

	while ((opt = getopt(argc, argv, "dpfn:")) > 0) {
		switch (opt) {
		case 'd':
			dump = 1;
			break;
		case 'p':
			parse = 1;
			break;
		case 'f':
			free(barebox_fdt);
			barebox_fdt = NULL;
			return 0;
		case 'n':
			node = optarg;
			break;
		}
	}

	if (optind < argc)
		file = argv[optind];

	if (!dump && !parse)
		return COMMAND_ERROR_USAGE;

	if (dump) {
		if (file) {
			fdt = read_file(file, &size);
			if (!fdt) {
				printf("unable to read %s\n", file);
				return 1;
			}

			fdt_print(fdt, node);
			free(fdt);
		} else {
			if (barebox_fdt) {
				fdt_print(barebox_fdt, node);
				return 0;
			} else {
				return 1;
			}
		}
		return 0;
	}

	if (parse) {
		if (!file)
			return COMMAND_ERROR_USAGE;

		fdt = read_file(file, &size);
		if (!fdt) {
			perror("open");
			return 1;
		}

		fdt = xrealloc(fdt, size + 0x8000);
		fdt_open_into(fdt, fdt, size + 0x8000);
		if (!fdt) {
			printf("unable to read %s\n", file);
			return 1;
		}

		if (barebox_fdt)
			free(barebox_fdt);

		barebox_fdt = fdt;
	}

	return 0;
}

BAREBOX_CMD_HELP_START(oftree)
BAREBOX_CMD_HELP_USAGE("oftree [OPTIONS]\n")
BAREBOX_CMD_HELP_OPT  ("-p <FILE>",  "parse and store oftree from <file>\n")
BAREBOX_CMD_HELP_OPT  ("-d [FILE]",  "dump oftree from [FILE] or the parsed tree if no file is given\n")
BAREBOX_CMD_HELP_OPT  ("-f",  "free stored oftree\n")
BAREBOX_CMD_HELP_END

BAREBOX_CMD_START(oftree)
	.cmd		= do_oftree,
	.usage		= "handle oftrees",
	BAREBOX_CMD_HELP(cmd_oftree_help)
BAREBOX_CMD_END