/* * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * 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 *//* * 07-10-2002 Frank Gottschling: added 29F032 flash (ELPPC). *        fixed monitor protection part * * 09-18-2001 Andreas Heppel: Reduced the code in here to the usage *        of AMD's 29F040 and 29F016 flashes, since the BAB7xx does use *        any other. */#include <common.h>#include <asm/processor.h>#include <asm/pci_io.h>flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ulong flash_get_size (vu_long *addr, flash_info_t *info);static int write_word (flash_info_t *info, ulong dest, ulong data);/*flash command address offsets*/#define ADDR0           (0x555)#define ADDR1           (0x2AA)#define ADDR3           (0x001)#define FLASH_WORD_SIZE unsigned char/*----------------------------------------------------------------------------*/unsigned long flash_init (void){    unsigned long size1, size2;    int i;    /* Init: no FLASHes known */    for (i=0; i<CFG_MAX_FLASH_BANKS; ++i)    {	flash_info[i].flash_id = FLASH_UNKNOWN;    }    /* initialise 1st flash */    size1 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);    if (flash_info[0].flash_id == FLASH_UNKNOWN)    {	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",	    size1, size1<<20);    }    /* initialise 2nd flash */    size2 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);    if (flash_info[1].flash_id == FLASH_UNKNOWN)    {	printf ("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",	    size2, size2<<20);    }    /* monitor protection ON by default */    if (size1 == 512*1024)    {	(void)flash_protect(FLAG_PROTECT_SET,		FLASH_BASE0_PRELIM,		FLASH_BASE0_PRELIM+monitor_flash_len-1,		&flash_info[0]);    }    if (size2 == 512*1024)    {	(void)flash_protect(FLAG_PROTECT_SET,		FLASH_BASE1_PRELIM,		FLASH_BASE1_PRELIM+monitor_flash_len-1,		&flash_info[1]);    }    if (size2 == 4*1024*1024)    {	(void)flash_protect(FLAG_PROTECT_SET,		CFG_FLASH_BASE,		CFG_FLASH_BASE+monitor_flash_len-1,		&flash_info[1]);    }    return (size1 + size2);}/*----------------------------------------------------------------------------*/void flash_print_info  (flash_info_t *info){    int i;    int k;    int size;    int erased;    volatile unsigned long *flash;    if (info->flash_id == FLASH_UNKNOWN) {	printf ("missing or unknown FLASH type\n");	flash_init();    }    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;    default:	printf ("Unknown Vendor ");	break;    }    switch (info->flash_id & FLASH_TYPEMASK) {    case AMD_ID_F040B:	printf ("AM29F040B (4 Mbit)\n");	break;    case AMD_ID_F016D:	printf ("AM29F016D (16 Mbit)\n");	break;    case AMD_ID_F032B:	printf ("AM29F032B (32 Mbit)\n");	break;   default:	printf ("Unknown Chip Type\n");	break;    }    if (info->size >= (1 << 20)) {	printf ("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);    } else {	printf ("  Size: %ld kB in %d Sectors\n", info->size >> 10, info->sector_count);    }    printf ("  Sector Start Addresses:");    for (i=0; i<info->sector_count; ++i) {	/*	* Check if whole sector is erased	*/	if (i != (info->sector_count-1))	    size = info->start[i+1] - info->start[i];	else	    size = info->start[0] + info->size - info->start[i];	erased = 1;	flash = (volatile unsigned long *)info->start[i];	size = size >> 2;        /* divide by 4 for longword access */	for (k=0; k<size; k++) {	    if (*flash++ != 0xffffffff) {		erased = 0;		break;	    }	}	if ((i % 5) == 0)	    printf ("\n   ");	printf (" %08lX%s%s",	    info->start[i],	    erased ? " E" : "  ",	    info->protect[i] ? "RO " : "   ");    }    printf ("\n");}/*----------------------------------------------------------------------------*//* * The following code cannot be run from FLASH! */ulong flash_get_size (vu_long *addr, flash_info_t *info){    short i;    ulong vendor, devid;    ulong base = (ulong)addr;    volatile unsigned char *caddr = (unsigned char *)addr;#ifdef DEBUG    printf("flash_get_size for address 0x%lx: \n", (unsigned long)caddr);#endif    /* Write auto select command: read Manufacturer ID */    caddr[0] = 0xF0;   /* reset bank */    udelay(10);    eieio();    caddr[0x555] = 0xAA;    udelay(10);    caddr[0x2AA] = 0x55;    udelay(10);    caddr[0x555] = 0x90;    udelay(10);    vendor = caddr[0];    devid = caddr[1];#ifdef DEBUG    printf("Manufacturer: 0x%lx\n", vendor);#endif    vendor &= 0xff;    devid &= 0xff;    /* We accept only two AMD types */    switch (vendor) {    case (FLASH_WORD_SIZE)AMD_MANUFACT:	info->flash_id = FLASH_MAN_AMD;	break;    default:	info->flash_id = FLASH_UNKNOWN;	info->sector_count = 0;	info->size = 0;	return (0);         /* no or unknown flash  */    }    switch (devid) {    case (FLASH_WORD_SIZE)AMD_ID_F040B:	info->flash_id |= AMD_ID_F040B;	info->sector_count = 8;	info->size = 0x00080000;	break;              /* => 0.5 MB      */    case (FLASH_WORD_SIZE)AMD_ID_F016D:	info->flash_id |= AMD_ID_F016D;	info->sector_count = 32;	info->size         = 0x00200000;	break;              /* => 2 MB      */    case (FLASH_WORD_SIZE)AMD_ID_F032B:	info->flash_id |= AMD_ID_F032B;	info->sector_count = 64;	info->size         = 0x00400000;	break;              /* => 4 MB      */    default:	info->flash_id = FLASH_UNKNOWN;	return (0);         /* => no or unknown flash */    }#ifdef DEBUG    printf("flash id 0x%lx; sector count 0x%x, size 0x%lx\n", info->flash_id, info->sector_count, info->size);#endif    /* check for protected sectors */    for (i = 0; i < info->sector_count; i++) {	/* sector base address */	info->start[i] = base + i * (info->size / info->sector_count);	/* read sector protection at sector address, (A7 .. A0) = 0x02 */	/* D0 = 1 if protected */	caddr = (volatile unsigned char *)(info->start[i]);	info->protect[i] = caddr[2] & 1;    }    /*     * Prevent writes to uninitialized FLASH.     */    if (info->flash_id != FLASH_UNKNOWN) {	caddr = (volatile unsigned char *)info->start[0];	caddr[0] = 0xF0;   /* reset bank */    }    return (info->size);}/*----------------------------------------------------------------------------*/int flash_erase (flash_info_t *info, int s_first, int s_last){    volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);    int flag, prot, sect, l_sect;    ulong start, now, last;    int rc = 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;    }    if ((info->flash_id == FLASH_UNKNOWN) ||	(info->flash_id > FLASH_AMD_COMP)) {	printf ("Can't erase unknown flash type - aborted\n");	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");    }    l_sect = -1;    /* Disable interrupts which might cause a timeout here */    flag = disable_interrupts();    addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;    addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;    addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;    addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;    addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;    /* Start erase on unprotected sectors */    for (sect = s_first; sect<=s_last; sect++) {	if (info->protect[sect] == 0) { /* not protected */	    addr = (FLASH_WORD_SIZE *)(info->start[sect]);	    if (info->flash_id & FLASH_MAN_SST) {		addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;		addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;		addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;		addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;		addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;		addr[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */		udelay(30000);  /* wait 30 ms */	    }	    else		addr[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */	    l_sect = sect;	}    }    /* re-enable interrupts if necessary */    if (flag)	enable_interrupts();    /* wait at least 80us - let's wait 1 ms */    udelay (1000);    /*     * We wait for the last triggered sector     */    if (l_sect < 0)	goto DONE;    start = get_timer (0);    last  = start;    addr = (FLASH_WORD_SIZE *)(info->start[l_sect]);    while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {	    printf ("Timeout\n");	    return 1;	}	/* show that we're waiting */	if ((now - last) > 1000) {  /* every second */	    serial_putc ('.');	    last = now;	}    }DONE:    /* reset to read mode */    addr = (FLASH_WORD_SIZE *)info->start[0];    addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */    printf (" done\n");    return rc;}/*----------------------------------------------------------------------------*//* * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt){    ulong cp, wp, data;    int i, l, rc;    wp = (addr & ~3);   /* 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);	}	for (; i<4 && cnt>0; ++i) {	    data = (data << 8) | *src++;	    --cnt;	    ++cp;	}	for (; cnt==0 && i<4; ++i, ++cp) {	    data = (data << 8) | (*(uchar *)cp);	}	if ((rc = write_word(info, wp, data)) != 0) {	    return (rc);	}	wp += 4;    }    /*     * handle word aligned part     */    while (cnt >= 4) {	data = 0;	for (i=0; i<4; ++i) {	    data = (data << 8) | *src++;	}	if ((rc = write_word(info, wp, data)) != 0) {	    return (rc);	}	wp  += 4;	cnt -= 4;    }    if (cnt == 0) {	return (0);    }    /*     * handle unaligned tail bytes     */    data = 0;    for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {	data = (data << 8) | *src++;	--cnt;    }    for (; i<4; ++i, ++cp) {	data = (data << 8) | (*(uchar *)cp);    }    return (write_word(info, wp, data));}/*----------------------------------------------------------------------------*//* Write a word to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */static int write_word (flash_info_t *info, ulong dest, ulong data){	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);	volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;	volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;    ulong start;    int flag;	int i;    /* Check if Flash is (sufficiently) erased */    if ((*((volatile FLASH_WORD_SIZE *)dest) &	     (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {	return (2);    }    /* Disable interrupts which might cause a timeout here */    flag = disable_interrupts();	for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)	  {	    addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;	    addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;	    addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;	    dest2[i] = data2[i];	    /* re-enable interrupts if necessary */	    if (flag)	      enable_interrupts();	    /* data polling for D7 */	    start = get_timer (0);	    while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=		   (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {	      if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {		return (1);	      }	    }	  }    return (0);}/*----------------------------------------------------------------------------*/