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  • /*
     * (C) Copyright 2008 Semihalf
     *
     * (C) Copyright 2000-2004
     * DENX Software Engineering
     * Wolfgang Denk, wd@denx.de
     *
     * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
     *		FIT image specific code abstracted from mkimage.c
     *		some functions added to address abstraction
     *
     * All rights reserved.
     *
     * 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
     */
    
    #include "mkimage.h"
    #include <image.h>
    #include <u-boot/crc.h>
    
    static image_header_t header;
    
    static int fit_verify_header (unsigned char *ptr, int image_size,
    			struct mkimage_params *params)
    {
    	return fdt_check_header ((void *)ptr);
    }
    
    static int fit_check_image_types (uint8_t type)
    {
    	if (type == IH_TYPE_FLATDT)
    		return EXIT_SUCCESS;
    	else
    		return EXIT_FAILURE;
    }
    
    /**
     * fit_handle_file - main FIT file processing function
     *
     * fit_handle_file() runs dtc to convert .its to .itb, includes
     * binary data, updates timestamp property and calculates hashes.
     *
     * datafile  - .its file
     * imagefile - .itb file
     *
     * returns:
     *     only on success, otherwise calls exit (EXIT_FAILURE);
     */
    static int fit_handle_file (struct mkimage_params *params)
    {
    	char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
    	char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
    	int tfd;
    	struct stat sbuf;
    	unsigned char *ptr;
    
    	/* Flattened Image Tree (FIT) format  handling */
    	debug ("FIT format handling\n");
    
    	/* call dtc to include binary properties into the tmp file */
    	if (strlen (params->imagefile) +
    		strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
    		fprintf (stderr, "%s: Image file name (%s) too long, "
    				"can't create tmpfile",
    				params->imagefile, params->cmdname);
    		return (EXIT_FAILURE);
    	}
    	sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
    
    
    	/* dtc -I dts -O dtb -p 500 datafile > tmpfile */
    
    	sprintf (cmd, "%s %s %s > %s",
    		MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
    	debug ("Trying to execute \"%s\"\n", cmd);
    	if (system (cmd) == -1) {
    		fprintf (stderr, "%s: system(%s) failed: %s\n",
    				params->cmdname, cmd, strerror(errno));
    		unlink (tmpfile);
    		return (EXIT_FAILURE);
    	}
    
    	/* load FIT blob into memory */
    	tfd = open (tmpfile, O_RDWR|O_BINARY);
    
    	if (tfd < 0) {
    		fprintf (stderr, "%s: Can't open %s: %s\n",
    				params->cmdname, tmpfile, strerror(errno));
    		unlink (tmpfile);
    		return (EXIT_FAILURE);
    	}
    
    	if (fstat (tfd, &sbuf) < 0) {
    		fprintf (stderr, "%s: Can't stat %s: %s\n",
    				params->cmdname, tmpfile, strerror(errno));
    		unlink (tmpfile);
    		return (EXIT_FAILURE);
    	}
    
    	ptr = mmap (0, sbuf.st_size, PROT_READ|PROT_WRITE, MAP_SHARED,
    				tfd, 0);
    	if (ptr == MAP_FAILED) {
    		fprintf (stderr, "%s: Can't read %s: %s\n",
    				params->cmdname, tmpfile, strerror(errno));
    		unlink (tmpfile);
    		return (EXIT_FAILURE);
    	}
    
    	/* check if ptr has a valid blob */
    	if (fdt_check_header (ptr)) {
    		fprintf (stderr, "%s: Invalid FIT blob\n", params->cmdname);
    		unlink (tmpfile);
    		return (EXIT_FAILURE);
    	}
    
    	/* set hashes for images in the blob */
    	if (fit_set_hashes (ptr)) {
    		fprintf (stderr, "%s Can't add hashes to FIT blob",
    				params->cmdname);
    		unlink (tmpfile);
    		return (EXIT_FAILURE);
    	}
    
    	/* add a timestamp at offset 0 i.e., root  */
    	if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) {
    		fprintf (stderr, "%s: Can't add image timestamp\n",
    				params->cmdname);
    		unlink (tmpfile);
    		return (EXIT_FAILURE);
    	}
    	debug ("Added timestamp successfully\n");
    
    	munmap ((void *)ptr, sbuf.st_size);
    	close (tfd);
    
    	if (rename (tmpfile, params->imagefile) == -1) {
    		fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
    				params->cmdname, tmpfile, params->imagefile,
    				strerror (errno));
    		unlink (tmpfile);
    		unlink (params->imagefile);
    		return (EXIT_FAILURE);
    	}
    	return (EXIT_SUCCESS);
    }
    
    static int fit_check_params (struct mkimage_params *params)
    {
    	return	((params->dflag && (params->fflag || params->lflag)) ||
    		(params->fflag && (params->dflag || params->lflag)) ||
    		(params->lflag && (params->dflag || params->fflag)));
    }
    
    static struct image_type_params fitimage_params = {
    	.name = "FIT Image support",
    	.header_size = sizeof(image_header_t),
    	.hdr = (void*)&header,
    	.verify_header = fit_verify_header,
    	.print_header = fit_print_contents,
    	.check_image_type = fit_check_image_types,
    	.fflag_handle = fit_handle_file,
    
    	.set_header = NULL,	/* FIT images use DTB header */
    
    	.check_params = fit_check_params,
    };
    
    void init_fit_image_type (void)
    {
    	mkimage_register (&fitimage_params);
    }