cmd_nand.c

嵌入式试验箱S3C2410的bootloader源代码

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

#include <common.h>


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

#if (CONFIG_COMMANDS & CFG_CMD_NAND)

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

#ifdef CONFIG_SHOW_BOOT_PROGRESS
# include <status_led.h>
# define SHOW_BOOT_PROGRESS(arg)    show_boot_progress(arg)
#else
# define SHOW_BOOT_PROGRESS(arg)
#endif

#include <jffs2/jffs2.h>
#include <nand.h>

#if (CONFIG_COMMANDS & CFG_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 (CONFIG_COMMANDS & CFG_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 (CONFIG_COMMANDS & CFG_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;
    int quiet = 0;
    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);
            return 0;
        }
        dev = (int)simple_strtoul(argv[2], NULL, 10);
        if (dev < 0 || dev >= CFG_MAX_NAND_DEVICE || !nand_info[dev].name) {
            puts("No such device\n");
            return 1;
        }
        printf("Device %d: %s", dev, nand_info[dev].name);
        puts("... is now current device\n");
        nand_curr_device = dev;

#ifdef CFG_NAND_SELECT_DEVICE
        /*
         * Select the chip in the board/cpu specific driver
         */
        board_nand_select_device(nand_info[dev].priv, dev);
#endif

        return 0;
    }

    if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
        strncmp(cmd, "dump", 4) != 0 &&
        strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
        strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
        strcmp(cmd, "biterr") != 0 &&
        strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 )
        goto usage;

    /* the following commands operate on the current device */
    if (nand_curr_device < 0 || nand_curr_device >= CFG_MAX_NAND_DEVICE ||
        !nand_info[nand_curr_device].name) {
        puts("\nno devices available\n");
        return 1;
    }
    nand = &nand_info[nand_curr_device];

    if (strcmp(cmd, "bad") == 0) {
        printf("\nDevice %d bad blocks:\n", nand_curr_device);
        for (off = 0; off < nand->size; off += nand->erasesize)
            if (nand_block_isbad(nand, off))
                printf("  %08x\n", off);
        return 0;
    }

    /*
     * Syntax is:
     *   0    1     2       3    4
     *   nand erase [clean] [off size]
     */
    if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
        nand_erase_options_t opts;
        /* "clean" at index 2 means request to write cleanmarker */
        int clean = argc > 2 && !strcmp("clean", argv[2]);
        int o = clean ? 3 : 2;
        int scrub = !strcmp(cmd, "scrub");

        printf("\nNAND %s: ", scrub ? "scrub" : "erase");
        /* skip first two or three arguments, look for offset and size */
        if (arg_off_size(argc - o, argv + o, nand, &off, &size) != 0)
            return 1;

        memset(&opts, 0, sizeof(opts));
        opts.offset = off;
        opts.length = size;
        opts.jffs2  = clean;
        opts.quiet  = quiet;

        if (scrub) {
            puts("Warning: "
                 "scrub option will erase all factory set "
                 "bad blocks!\n"
                 "         "
                 "There is no reliable way to recover them.\n"
                 "         "
                 "Use this command only for testing purposes "
                 "if you\n"
                 "         "
                 "are sure of what you are doing!\n"
                 "\nReally scrub this NAND flash? <y/N>\n");

            if (getc() == 'y' && getc() == '\r') {
                opts.scrub = 1;
            } else {
                puts("scrub aborted\n");
                return -1;
            }
        }
        ret = nand_erase_opts(nand, &opts);
        printf("%s\n", ret ? "ERROR" : "OK");

        return ret == 0 ? 0 : 1;
    }

    if (strncmp(cmd, "dump", 4) == 0) {
        if (argc < 3)
            goto usage;

        s = strchr(cmd, '.');
        off = (int)simple_strtoul(argv[2], NULL, 16);

        if (s != NULL && strcmp(s, ".oob") == 0)
            ret = nand_dump_oob(nand, off);
        else
            ret = nand_dump(nand, off);

        return ret == 0 ? 1 : 0;

    }

    /* read write */
    if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
        int read;

        if (argc < 4)
            goto usage;

        addr = (ulong)simple_strtoul(argv[2], NULL, 16);

        read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
        printf("\nNAND %s: ", read ? "read" : "write");
        if (arg_off_size(argc - 3, argv + 3, nand, &off, &size) != 0)
            return 1;

        s = strchr(cmd, '.');
        if (s != NULL &&
            (!strcmp(s, ".jffs2") || !strcmp(s, ".e") || !strcmp(s, ".i"))) {
            if (read) {
                /* read */
                nand_read_options_t opts;
                memset(&opts, 0, sizeof(opts));
                opts.buffer = (u_char*) addr;
                opts.length = size;
                opts.offset = off;
                opts.quiet      = quiet;
                ret = nand_read_opts(nand, &opts);
            } else {
                /* write */
                nand_write_options_t opts;
                memset(&opts, 0, sizeof(opts));
                opts.buffer = (u_char*) addr;
                opts.length = size;
                opts.offset = off;
                /* opts.forcejffs2 = 1; */
                opts.pad    = 1;
                opts.blockalign = 1;