cmd_nand.c

嵌入式试验箱S3C2410的bootloader源代码

                opts.quiet      = quiet;
                ret = nand_write_opts(nand, &opts);
            }
        }else if (  s != NULL && !strcmp(s, ".yaffs")){
            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.readoob = 1;
                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.forceyaffs = 1; */
                opts.noecc = 1;
                opts.writeoob = 1;
                opts.blockalign = 1;
                opts.quiet      = quiet;
                opts.skipfirstblk = 1;
                ret = nand_write_opts(nand, &opts);
            }
        }else if (  s != NULL && !strcmp(s, ".raw")){
            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.readoob = 0;
                opts.quiet      = quiet;
                opts.noecc  = 1;
                opts.nocheckbadblk = 1;
                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.forceyaffs = 1; */
                opts.noecc = 1;
                opts.writeoob = 0;
                opts.blockalign = 1;
                opts.quiet      = quiet;
                opts.skipfirstblk = 0;
                opts.nocheckbadblk = 1;
                ret = nand_write_opts(nand, &opts);
            }
        }        else {
            if (read)
                ret = nand_read(nand, off, &size, (u_char *)addr);
            else
                ret = nand_write(nand, off, &size, (u_char *)addr);
        }

        printf(" %d bytes %s: %s\n", size,
               read ? "read" : "written", ret ? "ERROR" : "OK");

        return ret == 0 ? 0 : 1;
    }

    if (strcmp(cmd, "markbad") == 0) {
        addr = (ulong)simple_strtoul(argv[2], NULL, 16);

        int ret = nand->block_markbad(nand, addr);
        if (ret == 0) {
            printf("block 0x%08lx successfully marked as bad\n",
                   (ulong) addr);
            return 0;
        } else {
            printf("block 0x%08lx NOT marked as bad! ERROR %d\n",
                   (ulong) addr, ret);
        }
        return 1;
    }
    if (strcmp(cmd, "biterr") == 0) {
        /* todo */
        return 1;
    }

    if (strcmp(cmd, "lock") == 0) {
        int tight  = 0;
        int status = 0;
        if (argc == 3) {
            if (!strcmp("tight", argv[2]))
                tight = 1;
            if (!strcmp("status", argv[2]))
                status = 1;
        }

        if (status) {
            ulong block_start = 0;
            ulong off;
            int last_status = -1;

            struct nand_chip *nand_chip = nand->priv;
            /* check the WP bit */
            nand_chip->cmdfunc (nand, NAND_CMD_STATUS, -1, -1);
            printf("device is %swrite protected\n",
                   (nand_chip->read_byte(nand) & 0x80 ?
                "NOT " : "" ) );

            for (off = 0; off < nand->size; off += nand->oobblock) {
                int s = nand_get_lock_status(nand, off);

                /* print message only if status has changed
                 * or at end of chip
                 */
                if (off == nand->size - nand->oobblock
                    || (s != last_status && off != 0))  {

                    printf("%08x - %08x: %8d pages %s%s%s\n",
                           block_start,
                           off-1,
                           (off-block_start)/nand->oobblock,
                           ((last_status & NAND_LOCK_STATUS_TIGHT) ? "TIGHT " : ""),
                           ((last_status & NAND_LOCK_STATUS_LOCK) ? "LOCK " : ""),
                           ((last_status & NAND_LOCK_STATUS_UNLOCK) ? "UNLOCK " : ""));
                }

                last_status = s;
               }
        } else {
            if (!nand_lock(nand, tight)) {
                puts("NAND flash successfully locked\n");
            } else {
                puts("Error locking NAND flash\n");
                return 1;
            }
        }
        return 0;
    }

    if (strcmp(cmd, "unlock") == 0) {
        if (arg_off_size(argc - 2, argv + 2, nand, &off, &size) < 0)
            return 1;

        if (!nand_unlock(nand, off, size)) {
            puts("NAND flash successfully unlocked\n");
        } else {
            puts("Error unlocking NAND flash, "
                 "write and erase will probably fail\n");
            return 1;
        }
        return 0;
    }

usage:
    printf("Usage:\n%s\n", cmdtp->usage);
    return 1;
}

U_BOOT_CMD(nand, 5, 1, do_nand,
    "nand    - NAND sub-system\n",
    "info                  - show available NAND devices\n"
    "nand device [dev]     - show or set current device\n"
    "nand read[.jffs2]     - addr off|partition size\n"
    "nand write[.jffs2]    - addr off|partiton size - read/write `size' bytes starting\n"
    "    at offset `off' to/from memory address `addr'\n"
    "nand read.yaffs addr off size - read the `size' byte yaffs image starting\n"
    "    at offset `off' to memory address `addr'\n"
    "nand write.yaffs addr off size - write the `size' byte yaffs image starting\n"
    "    at offset `off' from memory address `addr'\n"
    "nand read.raw addr off size - read the `size' bytes starting\n"
    "    at offset `off' to memory address `addr', without oob and ecc\n"
    "nand write.raw addr off size - write the `size' bytes starting\n"
    "    at offset `off' from memory address `addr', without oob and ecc\n"
    "nand erase [clean] [off size] - erase `size' bytes from\n"
    "    offset `off' (entire device if not specified)\n"
    "nand bad - show bad blocks\n"
    "nand dump[.oob] off - dump page\n"
    "nand scrub - really clean NAND erasing bad blocks (UNSAFE)\n"
    "nand markbad off - mark bad block at offset (UNSAFE)\n"
    "nand biterr off - make a bit error at offset (UNSAFE)\n"
    "nand lock [tight] [status] - bring nand to lock state or display locked pages\n"
    "nand unlock [offset] [size] - unlock section\n");

static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
               ulong offset, ulong addr, char *cmd)
{
    int r;
    char *ep;
    ulong cnt;
    image_header_t *hdr;

    printf("\nLoading from %s, offset 0x%lx\n", nand->name, offset);

    cnt = nand->oobblock;
    r = nand_read(nand, offset, &cnt, (u_char *) addr);
    if (r) {
        puts("** Read error\n");
        SHOW_BOOT_PROGRESS(-1);
        return 1;
    }

    hdr = (image_header_t *) addr;

    if (ntohl(hdr->ih_magic) != IH_MAGIC) {
        printf("\n** Bad Magic Number 0x%x **\n", hdr->ih_magic);
        SHOW_BOOT_PROGRESS(-1);
        return 1;
    }

    print_image_hdr(hdr);

    cnt = (ntohl(hdr->ih_size) + sizeof (image_header_t));

    r = nand_read(nand, offset, &cnt, (u_char *) addr);
    if (r) {
        puts("** Read error\n");
        SHOW_BOOT_PROGRESS(-1);
        return 1;
    }

    /* Loading ok, update default load address */

    load_addr = addr;

    /* Check if we should attempt an auto-start */
    if (((ep = getenv("autostart")) != NULL) && (strcmp(ep, "yes") == 0)) {
        char *local_args[2];
        extern int do_bootm(cmd_tbl_t *, int, int, char *[]);

        local_args[0] = cmd;
        local_args[1] = NULL;

        printf("Automatic boot of image at addr 0x%08lx ...\n", addr);

        do_bootm(cmdtp, 0, 1, local_args);
        return 1;
    }
    return 0;
}

int do_nandboot(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
    char *boot_device = NULL;
    int idx;
    ulong addr, offset = 0;
#if (CONFIG_COMMANDS & CFG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
    struct mtd_device *dev;
    struct part_info *part;
    u8 pnum;

    if (argc >= 2) {
        char *p = (argc == 2) ? argv[1] : argv[2];
        if (!(str2long(p, &addr)) && (mtdparts_init() == 0) &&
            (find_dev_and_part(p, &dev, &pnum, &part) == 0)) {
            if (dev->id->type != MTD_DEV_TYPE_NAND) {
                puts("Not a NAND device\n");
                return 1;
            }
            if (argc > 3)
                goto usage;
            if (argc == 3)
                addr = simple_strtoul(argv[1], NULL, 16);
            else
                addr = CFG_LOAD_ADDR;
            return nand_load_image(cmdtp, &nand_info[dev->id->num],
                           part->offset, addr, argv[0]);
        }
    }
#endif

    switch (argc) {
    case 1:
        addr = CFG_LOAD_ADDR;
        boot_device = getenv("bootdevice");
        break;
    case 2:
        addr = simple_strtoul(argv[1], NULL, 16);
        boot_device = getenv("bootdevice");
        break;
    case 3:
        addr = simple_strtoul(argv[1], NULL, 16);
        boot_device = argv[2];
        break;
    case 4:
        addr = simple_strtoul(argv[1], NULL, 16);
        boot_device = argv[2];
        offset = simple_strtoul(argv[3], NULL, 16);
        break;
    default:
#if (CONFIG_COMMANDS & CFG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
usage:
#endif
        printf("Usage:\n%s\n", cmdtp->usage);
        SHOW_BOOT_PROGRESS(-1);
        return 1;
    }

    if (!boot_device) {
        puts("\n** No boot device **\n");
        SHOW_BOOT_PROGRESS(-1);
        return 1;
    }

    idx = simple_strtoul(boot_device, NULL, 16);

    if (idx < 0 || idx >= CFG_MAX_NAND_DEVICE || !nand_info[idx].name) {
        printf("\n** Device %d not available\n", idx);
        SHOW_BOOT_PROGRESS(-1);
        return 1;
    }

    return nand_load_image(cmdtp, &nand_info[idx], offset, addr, argv[0]);
}

U_BOOT_CMD(nboot, 4, 1, do_nandboot,
    "nboot   - boot from NAND device\n",
    "[[loadAddr] partition] | [[[loadAddr] dev] offset]\n");

#endif              /* (CONFIG_COMMANDS & CFG_CMD_NAND) */

#else /* CFG_NAND_LEGACY */
/*
 *
 * Legacy NAND support - to be phased out
 *
 */
#include <command.h>
#include <malloc.h>
#include <asm/io.h>
#include <watchdog.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

#if (CONFIG_COMMANDS & CFG_CMD_NAND)
#include <linux/mtd/nand_legacy.h>
#if 0
#include <linux/mtd/nand_ids.h>
#include <jffs2/jffs2.h>
#endif

#ifdef CONFIG_OMAP1510