/*
 * (C) 2000 Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 * (C) 2003 August Hoeraendl, Logotronic GmbH
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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
 */

#undef CONFIG_FLASH_16BIT

#include <common.h>

#define FLASH_BANK_SIZE 0x1000000
#define MAIN_SECT_SIZE  0x20000         /* 2x64k = 128k per sector */

flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips    */

/* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it
 *        has nothing to do with the flash chip being 8-bit or 16-bit.
 */
#ifdef CONFIG_FLASH_16BIT
typedef unsigned short FLASH_PORT_WIDTH;
typedef volatile unsigned short FLASH_PORT_WIDTHV;

#define FLASH_ID_MASK   0xFFFF
#else
typedef unsigned long FLASH_PORT_WIDTH;
typedef volatile unsigned long FLASH_PORT_WIDTHV;

#define FLASH_ID_MASK   0xFFFFFFFF
#endif

#define FPW     FLASH_PORT_WIDTH
#define FPWV    FLASH_PORT_WIDTHV

#define ORMASK(size) ((-size) & OR_AM_MSK)

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size(FPWV *addr, flash_info_t *info);
static void flash_reset(flash_info_t *info);
static int write_word_intel(flash_info_t *info, FPWV *dest, FPW data);
static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
#define write_word(in, de, da)   write_word_amd(in, de, da)
static void flash_get_offsets(ulong base, flash_info_t *info);
#ifdef CONFIG_SYS_FLASH_PROTECTION
static void flash_sync_real_protect(flash_info_t *info);
#endif

/*-----------------------------------------------------------------------
 * flash_init()
 *
 * sets up flash_info and returns size of FLASH (bytes)
 */
ulong flash_init(void)
{
    int i, j;
    ulong size = 0;

    for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)
    {
        ulong flashbase = 0;
        flash_info[i].flash_id =
          (FLASH_MAN_AMD & FLASH_VENDMASK) |
          (FLASH_AM640U & FLASH_TYPEMASK);
        flash_info[i].size = FLASH_BANK_SIZE;
        flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
        memset(flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
        switch (i)
        {
           case 0:
                flashbase = PHYS_FLASH_1;
                break;
           case 1:
                flashbase = PHYS_FLASH_2;
                break;
           default:
                panic("configured too many flash banks!\n");
                break;
        }
        for (j = 0; j < flash_info[i].sector_count; j++)
        {
            flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
        }
        size += flash_info[i].size;
    }

    /* Protect monitor and environment sectors
     */
    flash_protect(FLAG_PROTECT_SET,
                  CONFIG_SYS_FLASH_BASE,
                  CONFIG_SYS_FLASH_BASE + _bss_start - _armboot_start,
                  &flash_info[0]);

    flash_protect(FLAG_PROTECT_SET,
                  CONFIG_ENV_ADDR,
                  CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
                  &flash_info[0]);

    return size;
}

/*-----------------------------------------------------------------------
 */
static void flash_reset(flash_info_t *info)
{
        FPWV *base = (FPWV *)(info->start[0]);

        /* Put FLASH back in read mode */
        if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
                *base = (FPW)0x00FF00FF;        /* Intel Read Mode */
        else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
                *base = (FPW)0x00F000F0;        /* AMD Read Mode */
}

/*-----------------------------------------------------------------------
 */
static void flash_get_offsets (ulong base, flash_info_t *info)
{
        int i;

        /* set up sector start address table */
        if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL
            && (info->flash_id & FLASH_BTYPE)) {
                int bootsect_size;      /* number of bytes/boot sector  */
                int sect_size;          /* number of bytes/regular sector */

                bootsect_size = 0x00002000 * (sizeof(FPW)/2);
                sect_size =     0x00010000 * (sizeof(FPW)/2);

                /* set sector offsets for bottom boot block type        */
                for (i = 0; i < 8; ++i) {
                        info->start[i] = base + (i * bootsect_size);
                }
                for (i = 8; i < info->sector_count; i++) {
                        info->start[i] = base + ((i - 7) * sect_size);
                }
        }
        else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD
                 && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) {

                int sect_size;          /* number of bytes/sector */

                sect_size = 0x00010000 * (sizeof(FPW)/2);

                /* set up sector start address table (uniform sector type) */
                for( i = 0; i < info->sector_count; i++ )
                        info->start[i] = base + (i * sect_size);
        }
}

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

void flash_print_info (flash_info_t *info)
{
        int i;
        uchar *boottype;
        uchar *bootletter;
        uchar *fmt;
        uchar botbootletter[] = "B";
        uchar topbootletter[] = "T";
        uchar botboottype[] = "bottom boot sector";
        uchar topboottype[] = "top boot sector";

        if (info->flash_id == FLASH_UNKNOWN) {
                printf ("missing or unknown FLASH type\n");
                return;
        }

        switch (info->flash_id & FLASH_VENDMASK) {
        case FLASH_MAN_AMD:     printf ("AMD ");                break;
        case FLASH_MAN_BM:      printf ("BRIGHT MICRO ");       break;
        case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
        case FLASH_MAN_SST:     printf ("SST ");                break;
        case FLASH_MAN_STM:     printf ("STM ");                break;
        case FLASH_MAN_INTEL:   printf ("INTEL ");              break;
        default:                printf ("Unknown Vendor ");     break;
        }

        /* check for top or bottom boot, if it applies */
        if (info->flash_id & FLASH_BTYPE) {
                boottype = botboottype;
                bootletter = botbootletter;
        }
        else {
                boottype = topboottype;
                bootletter = topbootletter;
        }

        switch (info->flash_id & FLASH_TYPEMASK) {
        case FLASH_AM640U:
                fmt = "29LV641D (64 Mbit, uniform sectors)\n";
                break;
        case FLASH_28F800C3B:
        case FLASH_28F800C3T:
                fmt = "28F800C3%s (8 Mbit, %s)\n";
                break;
        case FLASH_INTEL800B:
        case FLASH_INTEL800T:
                fmt = "28F800B3%s (8 Mbit, %s)\n";
                break;
        case FLASH_28F160C3B:
        case FLASH_28F160C3T:
                fmt = "28F160C3%s (16 Mbit, %s)\n";
                break;
        case FLASH_INTEL160B:
        case FLASH_INTEL160T:
                fmt = "28F160B3%s (16 Mbit, %s)\n";
                break;
        case FLASH_28F320C3B:
        case FLASH_28F320C3T:
                fmt = "28F320C3%s (32 Mbit, %s)\n";
                break;
        case FLASH_INTEL320B:
        case FLASH_INTEL320T:
                fmt = "28F320B3%s (32 Mbit, %s)\n";
                break;
        case FLASH_28F640C3B:
        case FLASH_28F640C3T:
                fmt = "28F640C3%s (64 Mbit, %s)\n";
                break;
        case FLASH_INTEL640B:
        case FLASH_INTEL640T:
                fmt = "28F640B3%s (64 Mbit, %s)\n";
                break;
        default:
                fmt = "Unknown Chip Type\n";
                break;
        }

        printf (fmt, bootletter, boottype);

        printf ("  Size: %ld MB in %d Sectors\n",
                info->size >> 20,
                info->sector_count);

        printf ("  Sector Start Addresses:");

        for (i=0; i<info->sector_count; ++i) {
                if ((i % 5) == 0) {
                        printf ("\n   ");
                }

                printf (" %08lX%s", info->start[i],
                        info->protect[i] ? " (RO)" : "     ");
        }

        printf ("\n");
}

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

/*
 * The following code cannot be run from FLASH!
 */

ulong flash_get_size (FPWV *addr, flash_info_t *info)
{
        /* Write auto select command: read Manufacturer ID */

        /* Write auto select command sequence and test FLASH answer */
        addr[0x0555] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */
        addr[0x02AA] = (FPW)0x00550055; /* for AMD, Intel ignores this */
        addr[0x0555] = (FPW)0x00900090; /* selects Intel or AMD */

        /* The manufacturer codes are only 1 byte, so just use 1 byte.
         * This works for any bus width and any FLASH device width.
         */
        switch (addr[0] & 0xff) {

        case (uchar)AMD_MANUFACT:
                info->flash_id = FLASH_MAN_AMD;
                break;

        case (uchar)INTEL_MANUFACT:
                info->flash_id = FLASH_MAN_INTEL;
                break;

        default:
                info->flash_id = FLASH_UNKNOWN;
                info->sector_count = 0;
                info->size = 0;
                break;
        }

        /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
        if (info->flash_id != FLASH_UNKNOWN) switch (addr[1]) {

        case (FPW)AMD_ID_LV640U:        /* 29LV640 and 29LV641 have same ID */
                info->flash_id += FLASH_AM640U;
                info->sector_count = 128;
                info->size = 0x00800000 * (sizeof(FPW)/2);
                break;                          /* => 8 or 16 MB        */

        case (FPW)INTEL_ID_28F800C3B:
                info->flash_id += FLASH_28F800C3B;
                info->sector_count = 23;
                info->size = 0x00100000 * (sizeof(FPW)/2);
                break;                          /* => 1 or 2 MB         */

        case (FPW)INTEL_ID_28F800B3B:
                info->flash_id += FLASH_INTEL800B;
                info->sector_count = 23;
                info->size = 0x00100000 * (sizeof(FPW)/2);
                break;                          /* => 1 or 2 MB         */

        case (FPW)INTEL_ID_28F160C3B:
                info->flash_id += FLASH_28F160C3B;
                info->sector_count = 39;
                info->size = 0x00200000 * (sizeof(FPW)/2);
                break;                          /* => 2 or 4 MB         */

        case (FPW)INTEL_ID_28F160B3B:
                info->flash_id += FLASH_INTEL160B;
                info->sector_count = 39;
                info->size = 0x00200000 * (sizeof(FPW)/2);
                break;                          /* => 2 or 4 MB         */

        case (FPW)INTEL_ID_28F320C3B:
                info->flash_id += FLASH_28F320C3B;
                info->sector_count = 71;
                info->size = 0x00400000 * (sizeof(FPW)/2);
                break;                          /* => 4 or 8 MB         */

        case (FPW)INTEL_ID_28F320B3B:
                info->flash_id += FLASH_INTEL320B;
                info->sector_count = 71;
                info->size = 0x00400000 * (sizeof(FPW)/2);
                break;                          /* => 4 or 8 MB         */

        case (FPW)INTEL_ID_28F640C3B:
                info->flash_id += FLASH_28F640C3B;
                info->sector_count = 135;
                info->size = 0x00800000 * (sizeof(FPW)/2);
                break;                          /* => 8 or 16 MB        */

        case (FPW)INTEL_ID_28F640B3B:
                info->flash_id += FLASH_INTEL640B;
                info->sector_count = 135;
                info->size = 0x00800000 * (sizeof(FPW)/2);
                break;                          /* => 8 or 16 MB        */

        default:
                info->flash_id = FLASH_UNKNOWN;
                info->sector_count = 0;
                info->size = 0;
                return (0);                     /* => no or unknown flash */
        }

        flash_get_offsets((ulong)addr, info);

        /* Put FLASH back in read mode */
        flash_reset(info);

        return (info->size);
}

#ifdef CONFIG_SYS_FLASH_PROTECTION
/*-----------------------------------------------------------------------
 */

static void flash_sync_real_protect(flash_info_t *info)
{
    FPWV *addr = (FPWV *)(info->start[0]);
    FPWV *sect;
    int i;

    switch (info->flash_id & FLASH_TYPEMASK) {
    case FLASH_28F800C3B:
    case FLASH_28F800C3T:
    case FLASH_28F160C3B:
    case FLASH_28F160C3T:
    case FLASH_28F320C3B:
    case FLASH_28F320C3T:
    case FLASH_28F640C3B:
    case FLASH_28F640C3T:
        /* check for protected sectors */
        *addr = (FPW)0x00900090;
        for (i = 0; i < info->sector_count; i++) {
            /* read sector protection at sector address, (A7 .. A0) = 0x02.
             * D0 = 1 for each device if protected.
             * If at least one device is protected the sector is marked
             * protected, but mixed protected and  unprotected devices
             * within a sector should never happen.
             */
            sect = (FPWV *)(info->start[i]);
            info->protect[i] = (sect[2] & (FPW)(0x00010001)) ? 1 : 0;
        }

        /* Put FLASH back in read mode */
        flash_reset(info);
        break;

    case FLASH_AM640U:
    default:
        /* no hardware protect that we support */
        break;
    }
}
#endif

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

int     flash_erase (flash_info_t *info, int s_first, int s_last)
{
        FPWV *addr;
        int flag, prot, sect;
        int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
        ulong start, now, last;
        int rcode = 0;

        if ((s_first < 0) || (s_first > s_last)) {
                if (info->flash_id == FLASH_UNKNOWN) {
                        printf ("- missing\n");
                } else {
                        printf ("- no sectors to erase\n");
                }
                return 1;
        }

        switch (info->flash_id & FLASH_TYPEMASK) {
        case FLASH_INTEL800B:
        case FLASH_INTEL160B:
        case FLASH_INTEL320B:
        case FLASH_INTEL640B:
        case FLASH_28F800C3B:
        case FLASH_28F160C3B:
        case FLASH_28F320C3B:
        case FLASH_28F640C3B:
        case FLASH_AM640U:
                break;
        case FLASH_UNKNOWN:
        default:
                printf ("Can't erase unknown flash type %08lx - aborted\n",
                        info->flash_id);
                return 1;
        }

        prot = 0;
        for (sect=s_first; sect<=s_last; ++sect) {
                if (info->protect[sect]) {
                        prot++;
                }
        }

        if (prot) {
                printf ("- Warning: %d protected sectors will not be erased!\n",
                        prot);
        } else {
                printf ("\n");
        }

        start = get_timer(0);
        last  = start;

        /* Start erase on unprotected sectors */
        for (sect = s_first; sect<=s_last && rcode == 0; sect++) {

                if (info->protect[sect] != 0)   /* protected, skip it */
                        continue;

                /* Disable interrupts which might cause a timeout here */
                flag = disable_interrupts();

                addr = (FPWV *)(info->start[sect]);
                if (intel) {
                        *addr = (FPW)0x00500050; /* clear status register */
                        *addr = (FPW)0x00200020; /* erase setup */
                        *addr = (FPW)0x00D000D0; /* erase confirm */
                }
                else {
                        /* must be AMD style if not Intel */
                        FPWV *base;             /* first address in bank */

                        base = (FPWV *)(info->start[0]);
                        base[0x0555] = (FPW)0x00AA00AA; /* unlock */
                        base[0x02AA] = (FPW)0x00550055; /* unlock */
                        base[0x0555] = (FPW)0x00800080; /* erase mode */
                        base[0x0555] = (FPW)0x00AA00AA; /* unlock */
                        base[0x02AA] = (FPW)0x00550055; /* unlock */
                        *addr = (FPW)0x00300030;        /* erase sector */
                }

                /* re-enable interrupts if necessary */
                if (flag)
                        enable_interrupts();

                /* wait at least 50us for AMD, 80us for Intel.
                 * Let's wait 1 ms.
                 */
                udelay (1000);

                while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) {
                        if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
                                printf ("Timeout\n");

                                if (intel) {
                                        /* suspend erase        */
                                        *addr = (FPW)0x00B000B0;
                                }

                                flash_reset(info);      /* reset to read mode */
                                rcode = 1;              /* failed */
                                break;
                        }

                        /* show that we're waiting */
                        if ((now - last) > 1000) {      /* every second */
                                putc ('.');
                                last = now;
                        }
                }

                flash_reset(info);      /* reset to read mode   */
        }

        printf (" done\n");
        return rcode;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
int bad_write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
    FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
    int bytes;    /* number of bytes to program in current word         */
    int left;     /* number of bytes left to program                    */
    int i, res;

    for (left = cnt, res = 0;
         left > 0 && res == 0;
         addr += sizeof(data), left -= sizeof(data) - bytes) {

        bytes = addr & (sizeof(data) - 1);
        addr &= ~(sizeof(data) - 1);

        /* combine source and destination data so can program
         * an entire word of 16 or 32 bits
         */
        for (i = 0; i < sizeof(data); i++) {
            data <<= 8;
            if (i < bytes || i - bytes >= left )
                data += *((uchar *)addr + i);
            else
                data += *src++;
        }

        /* write one word to the flash */
        switch (info->flash_id & FLASH_VENDMASK) {
        case FLASH_MAN_AMD:
                res = write_word_amd(info, (FPWV *)addr, data);
                break;
        case FLASH_MAN_INTEL:
                res = write_word_intel(info, (FPWV *)addr, data);
                break;
        default:
                /* unknown flash type, error! */
                printf ("missing or unknown FLASH type\n");
                res = 1;        /* not really a timeout, but gives error */
                break;
        }
    }

    return (res);
}

/**
 * write_buf: - Copy memory to flash.
 *
 * @param info:
 * @param src:  source of copy transaction
 * @param addr: where to copy to
 * @param cnt:  number of bytes to copy
 *
 * @return      error code
 */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
        ulong cp, wp;
        FPW data;
        int l;
        int i, rc;

        wp = (addr & ~1);       /* get lower word aligned address */

        /*
         * handle unaligned start bytes
         */
        if ((l = addr - wp) != 0) {
                data = 0;
                for (i=0, cp=wp; i<l; ++i, ++cp) {
                        data = (data >> 8) | (*(uchar *)cp << 8);
                }
                for (; i<2 && cnt>0; ++i) {
                        data = (data >> 8) | (*src++ << 8);
                        --cnt;
                        ++cp;
                }
                for (; cnt==0 && i<2; ++i, ++cp) {
                        data = (data >> 8) | (*(uchar *)cp << 8);
                }

                if ((rc = write_word(info, wp, data)) != 0) {
                        return (rc);
                }
                wp += 2;
        }

        /*
         * handle word aligned part
         */
        while (cnt >= 2) {
                /* data = *((vushort*)src); */
                data = *((FPW*)src);
                if ((rc = write_word(info, wp, data)) != 0) {
                        return (rc);
                }
                src += sizeof(FPW);
                wp  += sizeof(FPW);
                cnt -= sizeof(FPW);
        }

        if (cnt == 0) return ERR_OK;

        /*
         * handle unaligned tail bytes
         */
        data = 0;
        for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
                data = (data >> 8) | (*src++ << 8);
                --cnt;
        }
        for (; i<2; ++i, ++cp) {
                data = (data >> 8) | (*(uchar *)cp << 8);
        }

        return write_word(info, wp, data);
}


/*-----------------------------------------------------------------------
 * Write a word to Flash for AMD FLASH
 * A word is 16 or 32 bits, whichever the bus width of the flash bank
 * (not an individual chip) is.
 *
 * returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
{
    ulong start;
    int flag;
    int res = 0;        /* result, assume success       */
    FPWV *base;         /* first address in flash bank  */

    /* Check if Flash is (sufficiently) erased */
    if ((*dest & data) != data) {
        return (2);
    }


    base = (FPWV *)(info->start[0]);
    /* Disable interrupts which might cause a timeout here */
    flag = disable_interrupts();

    base[0x0555] = (FPW)0x00AA00AA;     /* unlock */
    base[0x02AA] = (FPW)0x00550055;     /* unlock */
    base[0x0555] = (FPW)0x00A000A0;     /* selects program mode */

    *dest = data;               /* start programming the data   */

    /* re-enable interrupts if necessary */
    if (flag)
        enable_interrupts();

    start = get_timer (0);

    /* data polling for D7 */
    while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) {
        if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
            *dest = (FPW)0x00F000F0;    /* reset bank */
            res = 1;
        }
    }

    return (res);
}

/*-----------------------------------------------------------------------
 * Write a word to Flash for Intel FLASH
 * A word is 16 or 32 bits, whichever the bus width of the flash bank
 * (not an individual chip) is.
 *
 * returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_word_intel (flash_info_t *info, FPWV *dest, FPW data)
{
    ulong start;
    int flag;
    int res = 0;        /* result, assume success       */

    /* Check if Flash is (sufficiently) erased */
    if ((*dest & data) != data) {
        return (2);
    }

    /* Disable interrupts which might cause a timeout here */
    flag = disable_interrupts();

    *dest = (FPW)0x00500050;    /* clear status register        */
    *dest = (FPW)0x00FF00FF;    /* make sure in read mode       */
    *dest = (FPW)0x00400040;    /* program setup                */

    *dest = data;               /* start programming the data   */

    /* re-enable interrupts if necessary */
    if (flag)
        enable_interrupts();

    start = get_timer (0);

    while (res == 0 && (*dest & (FPW)0x00800080) != (FPW)0x00800080) {
        if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
            *dest = (FPW)0x00B000B0;    /* Suspend program      */
            res = 1;
        }
    }

    if (res == 0 && (*dest & (FPW)0x00100010))
        res = 1;        /* write failed, time out error is close enough */

    *dest = (FPW)0x00500050;    /* clear status register        */
    *dest = (FPW)0x00FF00FF;    /* make sure in read mode       */

    return (res);
}

#ifdef CONFIG_SYS_FLASH_PROTECTION
/*-----------------------------------------------------------------------
 */
int flash_real_protect (flash_info_t * info, long sector, int prot)
{
        int rcode = 0;          /* assume success */
        FPWV *addr;             /* address of sector */
        FPW value;

        addr = (FPWV *) (info->start[sector]);

        switch (info->flash_id & FLASH_TYPEMASK) {
        case FLASH_28F800C3B:
        case FLASH_28F800C3T:
        case FLASH_28F160C3B:
        case FLASH_28F160C3T:
        case FLASH_28F320C3B:
        case FLASH_28F320C3T:
        case FLASH_28F640C3B:
        case FLASH_28F640C3T:
                flash_reset (info);             /* make sure in read mode */
                *addr = (FPW) 0x00600060L;      /* lock command setup */
                if (prot)
                        *addr = (FPW) 0x00010001L;      /* lock sector */
                else
                        *addr = (FPW) 0x00D000D0L;      /* unlock sector */
                flash_reset (info);             /* reset to read mode */

                /* now see if it really is locked/unlocked as requested */
                *addr = (FPW) 0x00900090;
                /* read sector protection at sector address, (A7 .. A0) = 0x02.
                 * D0 = 1 for each device if protected.
                 * If at least one device is protected the sector is marked
                 * protected, but return failure. Mixed protected and
                 * unprotected devices within a sector should never happen.
                 */
                value = addr[2] & (FPW) 0x00010001;
                if (value == 0)
                        info->protect[sector] = 0;
                else if (value == (FPW) 0x00010001)
                        info->protect[sector] = 1;
                else {
                        /* error, mixed protected and unprotected */
                        rcode = 1;
                        info->protect[sector] = 1;
                }
                if (info->protect[sector] != prot)
                        rcode = 1;      /* failed to protect/unprotect as requested */

                /* reload all protection bits from hardware for now */
                flash_sync_real_protect (info);
                break;

        case FLASH_AM640U:
        default:
                /* no hardware protect that we support */
                info->protect[sector] = prot;
                break;
        }

        return rcode;
}
#endif