cmd_nand.c

/*
 * Driver for NAND support, Rick Bronson
 * borrowed heavily from:
 * (c) 1999 Machine Vision Holdings, Inc.
 * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org>
 *
 * Added 16-bit nand support
 * (C) 2004 Texas Instruments
 */

#include <common.h>


#ifndef CFG_NAND_LEGACY
/*
 *
 * New NAND support
 *
 */
#include <common.h>

#if defined(CONFIG_CMD_NAND)

#include <command.h>
#include <watchdog.h>
#include <malloc.h>
#include <asm/byteorder.h>
#include <jffs2/jffs2.h>
#include <nand.h>

#if defined(CONFIG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)

/* parition handling routines */
int mtdparts_init(void);
int id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num);
int find_dev_and_part(const char *id, struct mtd_device **dev,
		u8 *part_num, struct part_info **part);
#endif

extern nand_info_t nand_info[];       /* info for NAND chips */

static int nand_dump_oob(nand_info_t *nand, ulong off)
{
	return 0;
}

static int nand_dump(nand_info_t *nand, ulong off)
{
	int i;
	u_char *buf, *p;

	buf = malloc(nand->oobblock + nand->oobsize);
	if (!buf) {
		puts("No memory for page buffer\n");
		return 1;
	}
	off &= ~(nand->oobblock - 1);
	i = nand_read_raw(nand, buf, off, nand->oobblock, nand->oobsize);
	if (i < 0) {
		printf("Error (%d) reading page %08x\n", i, off);
		free(buf);
		return 1;
	}
	printf("Page %08x dump:\n", off);
	i = nand->oobblock >> 4; p = buf;
	while (i--) {
		printf( "\t%02x %02x %02x %02x %02x %02x %02x %02x"
			"  %02x %02x %02x %02x %02x %02x %02x %02x\n",
			p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
			p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
		p += 16;
	}
	puts("OOB:\n");
	i = nand->oobsize >> 3;
	while (i--) {
		printf( "\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
			p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
		p += 8;
	}
	free(buf);

	return 0;
}

/* ------------------------------------------------------------------------- */

static inline int str2long(char *p, ulong *num)
{
	char *endptr;

	*num = simple_strtoul(p, &endptr, 16);
	return (*p != '\0' && *endptr == '\0') ? 1 : 0;
}

static int
arg_off_size(int argc, char *argv[], nand_info_t *nand, ulong *off, ulong *size)
{
	int idx = nand_curr_device;
#if defined(CONFIG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
	struct mtd_device *dev;
	struct part_info *part;
	u8 pnum;

	if (argc >= 1 && !(str2long(argv[0], off))) {
		if ((mtdparts_init() == 0) &&
		    (find_dev_and_part(argv[0], &dev, &pnum, &part) == 0)) {
			if (dev->id->type != MTD_DEV_TYPE_NAND) {
				puts("not a NAND device\n");
				return -1;
			}
			*off = part->offset;
			if (argc >= 2) {
				if (!(str2long(argv[1], size))) {
					printf("'%s' is not a number\n", argv[1]);
					return -1;
				}
				if (*size > part->size)
					*size = part->size;
			} else {
				*size = part->size;
			}
			idx = dev->id->num;
			*nand = nand_info[idx];
			goto out;
		}
	}
#endif

	if (argc >= 1) {
		if (!(str2long(argv[0], off))) {
			printf("'%s' is not a number\n", argv[0]);
			return -1;
		}
	} else {
		*off = 0;
	}

	if (argc >= 2) {
		if (!(str2long(argv[1], size))) {
			printf("'%s' is not a number\n", argv[1]);
			return -1;
		}
	} else {
		*size = nand->size - *off;
	}

#if  defined(CONFIG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
out:
#endif
	printf("device %d ", idx);
	if (*size == nand->size)
		puts("whole chip\n");
	else
		printf("offset 0x%x, size 0x%x\n", *off, *size);
	return 0;
}

int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	int i, dev, ret;
	ulong addr, off, size;
	char *cmd, *s;
	nand_info_t *nand;
#ifdef CFG_NAND_QUIET
	int quiet = CFG_NAND_QUIET;
#else
	int quiet = 0;
#endif
	const char *quiet_str = getenv("quiet");

	/* at least two arguments please */
	if (argc < 2)
		goto usage;

	if (quiet_str)
		quiet = simple_strtoul(quiet_str, NULL, 0) != 0;

	cmd = argv[1];

	if (strcmp(cmd, "info") == 0) {

		putc('\n');
		for (i = 0; i < CFG_MAX_NAND_DEVICE; i++) {
			if (nand_info[i].name)
				printf("Device %d: %s, sector size %lu KiB\n",
					i, nand_info[i].name,
					nand_info[i].erasesize >> 10);
		}
		return 0;
	}

	if (strcmp(cmd, "device") == 0) {

		if (argc < 3) {
			if ((nand_curr_device < 0) ||
			    (nand_curr_device >= CFG_MAX_NAND_DEVICE))
				puts("\nno devices available\n");
			else
				printf("\nDevice %d: %s\n", nand_curr_device,
					nand_info[nand_curr_device].name);