[people/ms/u-boot.git] / board / samsung / smdkv310 / tools / mkv310_image.c

/*
 * Copyright (C) 2011 Samsung Electronics
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>

#define CHECKSUM_OFFSET		(14*1024-4)
#define BUFSIZE			(16*1024)
#define FILE_PERM		(S_IRUSR | S_IWUSR | S_IRGRP \
				| S_IWGRP | S_IROTH | S_IWOTH)
/*
* Requirement:
* IROM code reads first 14K bytes from boot device.
* It then calculates the checksum of 14K-4 bytes and compare with data at
* 14K-4 offset.
*
* This function takes two filenames:
* IN  "u-boot-spl.bin" and
* OUT "u-boot-mmc-spl.bin" as filenames.
* It reads the "u-boot-spl.bin" in 16K buffer.
* It calculates checksum of 14K-4 Bytes and stores at 14K-4 offset in buffer.
* It writes the buffer to "u-boot-mmc-spl.bin" file.
*/

int main(int argc, char **argv)
{
	int i, len;
	unsigned char buffer[BUFSIZE] = {0};
	int ifd, ofd;
	unsigned int checksum = 0, count;

	if (argc != 3) {
		printf(" %d Wrong number of arguments\n", argc);
		exit(EXIT_FAILURE);
	}

	ifd = open(argv[1], O_RDONLY);
	if (ifd < 0) {
		fprintf(stderr, "%s: Can't open %s: %s\n",
			argv[0], argv[1], strerror(errno));
		exit(EXIT_FAILURE);
	}

	ofd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, FILE_PERM);
	if (ifd < 0) {
		fprintf(stderr, "%s: Can't open %s: %s\n",
			argv[0], argv[2], strerror(errno));
		if (ifd)
			close(ifd);
		exit(EXIT_FAILURE);
	}

	len = lseek(ifd, 0, SEEK_END);
	lseek(ifd, 0, SEEK_SET);

	count = (len < CHECKSUM_OFFSET) ? len : CHECKSUM_OFFSET;

	if (read(ifd, buffer, count) != count) {
		fprintf(stderr, "%s: Can't read %s: %s\n",
			argv[0], argv[1], strerror(errno));

		if (ifd)
			close(ifd);
		if (ofd)
			close(ofd);

		exit(EXIT_FAILURE);
	}

	for (i = 0, checksum = 0; i < CHECKSUM_OFFSET; i++)
		checksum += buffer[i];

	memcpy(&buffer[CHECKSUM_OFFSET], &checksum, sizeof(checksum));

	if (write(ofd, buffer, BUFSIZE) != BUFSIZE) {
		fprintf(stderr, "%s: Can't write %s: %s\n",
			argv[0], argv[2], strerror(errno));

		if (ifd)
			close(ifd);
		if (ofd)
			close(ofd);

		exit(EXIT_FAILURE);
	}

	if (ifd)
		close(ifd);
	if (ofd)
		close(ofd);

	return EXIT_SUCCESS;
}
Commit	Line	Data
0d3c62e4 CK	1	/*
	2	* Copyright (C) 2011 Samsung Electronics
	3	*
1a459660	4	* SPDX-License-Identifier: GPL-2.0+
0d3c62e4 CK	5	*/
	6
	7	#include <stdio.h>
	8	#include <stdlib.h>
	9	#include <unistd.h>
	10	#include <fcntl.h>
	11	#include <errno.h>
	12	#include <string.h>
34d34b88	13	#include <sys/stat.h>
0d3c62e4 CK	14
	15	#define CHECKSUM_OFFSET (14*1024-4)
	16	#define BUFSIZE (16*1024)
	17	#define FILE_PERM (S_IRUSR \| S_IWUSR \| S_IRGRP \
	18	\| S_IWGRP \| S_IROTH \| S_IWOTH)
	19	/*
	20	* Requirement:
	21	* IROM code reads first 14K bytes from boot device.
	22	* It then calculates the checksum of 14K-4 bytes and compare with data at
	23	* 14K-4 offset.
	24	*
	25	* This function takes two filenames:
	26	* IN "u-boot-spl.bin" and
	27	* OUT "u-boot-mmc-spl.bin" as filenames.
	28	* It reads the "u-boot-spl.bin" in 16K buffer.
	29	* It calculates checksum of 14K-4 Bytes and stores at 14K-4 offset in buffer.
	30	* It writes the buffer to "u-boot-mmc-spl.bin" file.
	31	*/
	32
	33	int main(int argc, char **argv)
	34	{
	35	int i, len;
	36	unsigned char buffer[BUFSIZE] = {0};
	37	int ifd, ofd;
	38	unsigned int checksum = 0, count;
	39
	40	if (argc != 3) {
	41	printf(" %d Wrong number of arguments\n", argc);
	42	exit(EXIT_FAILURE);
	43	}
	44
	45	ifd = open(argv[1], O_RDONLY);
	46	if (ifd < 0) {
	47	fprintf(stderr, "%s: Can't open %s: %s\n",
	48	argv[0], argv[1], strerror(errno));
	49	exit(EXIT_FAILURE);
	50	}
	51
	52	ofd = open(argv[2], O_WRONLY \| O_CREAT \| O_TRUNC, FILE_PERM);
	53	if (ifd < 0) {
	54	fprintf(stderr, "%s: Can't open %s: %s\n",
	55	argv[0], argv[2], strerror(errno));
	56	if (ifd)
	57	close(ifd);
	58	exit(EXIT_FAILURE);
	59	}
	60
	61	len = lseek(ifd, 0, SEEK_END);
	62	lseek(ifd, 0, SEEK_SET);
	63
	64	count = (len < CHECKSUM_OFFSET) ? len : CHECKSUM_OFFSET;
	65
	66	if (read(ifd, buffer, count) != count) {
	67	fprintf(stderr, "%s: Can't read %s: %s\n",
	68	argv[0], argv[1], strerror(errno));
	69
	70	if (ifd)
	71	close(ifd);
	72	if (ofd)
	73	close(ofd);
	74
	75	exit(EXIT_FAILURE);
	76	}
	77
78	for (i = 0, checksum = 0; i < CHECKSUM_OFFSET; i++)
79	checksum += buffer[i];
80
81	memcpy(&buffer[CHECKSUM_OFFSET], &checksum, sizeof(checksum));
82
83	if (write(ofd, buffer, BUFSIZE) != BUFSIZE) {
84	fprintf(stderr, "%s: Can't write %s: %s\n",
85	argv[0], argv[2], strerror(errno));
86
87	if (ifd)
88	close(ifd);
89	if (ofd)
90	close(ofd);
91
92	exit(EXIT_FAILURE);
93	}
94
95	if (ifd)
96	close(ifd);
97	if (ofd)
98	close(ofd);
99
100	return EXIT_SUCCESS;
101	}