Skip to content
Snippets Groups Projects
flash.c 18.6 KiB
Newer Older
  • Learn to ignore specific revisions
  • Wolfgang Denk's avatar
    Wolfgang Denk committed
    /*
     * (C) Copyright 2001
     * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
     *
     * 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
     */
    
    #include <common.h>
    
    #ifdef __PPC__
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    #include <ppc4xx.h>
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    #include <asm/processor.h>
    
    flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
    
    /*-----------------------------------------------------------------------
     * Functions
     */
    static int write_word (flash_info_t *info, ulong dest, ulong data);
    
    /*-----------------------------------------------------------------------
     */
    static void flash_get_offsets (ulong base, flash_info_t *info)
    {
    	int i;
    	short n;
    
    	/* set up sector start address table */
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
    	    for (i = 0; i < info->sector_count; i++)
    		info->start[i] = base + (i * 0x00010000);
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
    		/* set sector offsets for bottom boot block type	*/
    		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/
    			info->start[i] = base;
    			base += 8 << 10;
    		}
    		while (i < info->sector_count) {	/* 64k regular sectors	*/
    			info->start[i] = base;
    			base += 64 << 10;
    			++i;
    		}
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
    		/* set sector offsets for top boot block type		*/
    		base += info->size;
    		i = info->sector_count;
    		for (n=0; n<8; ++n) {		/*  8 x 8k boot sectors	*/
    			base -= 8 << 10;
    			--i;
    			info->start[i] = base;
    		}
    		while (i > 0) {			/* 64k regular sectors	*/
    			base -= 64 << 10;
    			--i;
    			info->start[i] = base;
    		}
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	} else {
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	    if (info->flash_id & FLASH_BTYPE) {
    		/* set sector offsets for bottom boot block type	*/
    		info->start[0] = base + 0x00000000;
    		info->start[1] = base + 0x00004000;
    		info->start[2] = base + 0x00006000;
    		info->start[3] = base + 0x00008000;
    		for (i = 4; i < info->sector_count; i++) {
    			info->start[i] = base + (i * 0x00010000) - 0x00030000;
    		}
    	    } else {
    		/* set sector offsets for top boot block type		*/
    		i = info->sector_count - 1;
    		info->start[i--] = base + info->size - 0x00004000;
    		info->start[i--] = base + info->size - 0x00006000;
    		info->start[i--] = base + info->size - 0x00008000;
    		for (; i >= 0; i--) {
    			info->start[i] = base + i * 0x00010000;
    		}
    	    }
    	}
    }
    
    /*-----------------------------------------------------------------------
     */
    void flash_print_info  (flash_info_t *info)
    {
    	int i;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	int k;
    	int size;
    	int erased;
    	volatile unsigned long *flash;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    
    	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_FUJ:	printf ("FUJITSU ");		break;
    	case FLASH_MAN_SST:	printf ("SST ");		break;
    
    Stefan Roese's avatar
    Stefan Roese committed
    	case FLASH_MAN_EXCEL:	printf ("Excel Semiconductor "); break;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	default:		printf ("Unknown Vendor ");	break;
    	}
    
    	switch (info->flash_id & FLASH_TYPEMASK) {
    	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
    				break;
    	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
    				break;
    	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
    				break;
    	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
    				break;
    	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
    				break;
    	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
    				break;
    	case FLASH_AM320T:	printf ("AM29LV320T (32 M, top sector)\n");
    				break;
    	case FLASH_AM320B:	printf ("AM29LV320B (32 M, bottom sector)\n");
    				break;
    	case FLASH_AMDL322T:	printf ("AM29DL322T (32 M, top sector)\n");
    				break;
    	case FLASH_AMDL322B:	printf ("AM29DL322B (32 M, bottom sector)\n");
    				break;
    	case FLASH_AMDL323T:	printf ("AM29DL323T (32 M, top sector)\n");
    				break;
    	case FLASH_AMDL323B:	printf ("AM29DL323B (32 M, bottom sector)\n");
    				break;
    	case FLASH_AM640U:	printf ("AM29LV640D (64 M, uniform sector)\n");
    				break;
    	case FLASH_SST800A:	printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
    				break;
    	case FLASH_SST160A:	printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
    				break;
    
    Stefan Roese's avatar
    Stefan Roese committed
    	case FLASH_SST320:	printf ("SST39LF/VF320 (32 Mbit, uniform sector size)\n");
    				break;
    	case FLASH_SST640:	printf ("SST39LF/VF640 (64 Mbit, uniform sector size)\n");
    				break;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	default:		printf ("Unknown Chip Type\n");
    				break;
    	}
    
    	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) {
    #ifdef CFG_FLASH_EMPTY_INFO
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		/*
    		 * 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;
    		      }
    		  }
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    
    		if ((i % 5) == 0)
    			printf ("\n   ");
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		/* print empty and read-only info */
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		printf (" %08lX%s%s",
    			info->start[i],
    			erased ? " E" : "  ",
    			info->protect[i] ? "RO " : "   ");
    #else
    		if ((i % 5) == 0)
    			printf ("\n   ");
    		printf (" %08lX%s",
    			info->start[i],
    			info->protect[i] ? " (RO)" : "     ");
    #endif
    
    	}
    	printf ("\n");
    	return;
    }
    
    /*-----------------------------------------------------------------------
     */
    
    
    /*-----------------------------------------------------------------------
     */
    
    /*
     * The following code cannot be run from FLASH!
     */
    static ulong flash_get_size (vu_long *addr, flash_info_t *info)
    {
    	short i;
    	short n;
    	CFG_FLASH_WORD_SIZE value;
    	ulong base = (ulong)addr;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)addr;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    
    	/* Write auto select command: read Manufacturer ID */
    	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
    	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
    	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00900090;
    
    	value = addr2[CFG_FLASH_READ0];
    
    	switch (value) {
    	case (CFG_FLASH_WORD_SIZE)AMD_MANUFACT:
    		info->flash_id = FLASH_MAN_AMD;
    		break;
    	case (CFG_FLASH_WORD_SIZE)FUJ_MANUFACT:
    		info->flash_id = FLASH_MAN_FUJ;
    		break;
    	case (CFG_FLASH_WORD_SIZE)SST_MANUFACT:
    		info->flash_id = FLASH_MAN_SST;
    		break;
    
    Stefan Roese's avatar
    Stefan Roese committed
    	case (CFG_FLASH_WORD_SIZE)EXCEL_MANUFACT:
    		info->flash_id = FLASH_MAN_EXCEL;
    		break;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	default:
    		info->flash_id = FLASH_UNKNOWN;
    		info->sector_count = 0;
    		info->size = 0;
    		return (0);			/* no or unknown flash	*/
    	}
    
    	value = addr2[CFG_FLASH_READ1];		/* device ID		*/
    
    	switch (value) {
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400T:
    		info->flash_id += FLASH_AM400T;
    		info->sector_count = 11;
    		info->size = 0x00080000;
    		break;				/* => 0.5 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400B:
    		info->flash_id += FLASH_AM400B;
    		info->sector_count = 11;
    		info->size = 0x00080000;
    		break;				/* => 0.5 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800T:
    		info->flash_id += FLASH_AM800T;
    		info->sector_count = 19;
    		info->size = 0x00100000;
    		break;				/* => 1 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800B:
    		info->flash_id += FLASH_AM800B;
    		info->sector_count = 19;
    		info->size = 0x00100000;
    		break;				/* => 1 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160T:
    		info->flash_id += FLASH_AM160T;
    		info->sector_count = 35;
    		info->size = 0x00200000;
    		break;				/* => 2 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160B:
    		info->flash_id += FLASH_AM160B;
    		info->sector_count = 35;
    		info->size = 0x00200000;
    		break;				/* => 2 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_AM320T;
    		info->sector_count = 71;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->size = 0x00400000;  break;	/* => 4 MB	*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_AM320B;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->sector_count = 71;
    		info->size = 0x00400000;  break;	/* => 4 MB	*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322T:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_AMDL322T;
    		info->sector_count = 71;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->size = 0x00400000;  break;	/* => 4 MB	*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322B:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_AMDL322B;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->sector_count = 71;
    		info->size = 0x00400000;  break;	/* => 4 MB	*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323T:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_AMDL323T;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->sector_count = 71;
    		info->size = 0x00400000;  break;	/* => 4 MB	*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323B:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_AMDL323B;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->sector_count = 71;
    		info->size = 0x00400000;  break;	/* => 4 MB	*/
    
    	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV640U:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_AM640U;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->sector_count = 128;
    		info->size = 0x00800000;  break;	/* => 8 MB	*/
    
    
    Stefan Roese's avatar
    Stefan Roese committed
    #if !(defined(CONFIG_ADCIOP) || defined(CONFIG_DASA_SIM))
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF800A:
    		info->flash_id += FLASH_SST800A;
    		info->sector_count = 16;
    		info->size = 0x00100000;
    		break;				/* => 1 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF160A:
    
    Stefan Roese's avatar
    Stefan Roese committed
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF1601:
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF1602:
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		info->flash_id += FLASH_SST160A;
    		info->sector_count = 32;
    		info->size = 0x00200000;
    		break;				/* => 2 MB		*/
    
    
    Stefan Roese's avatar
    Stefan Roese committed
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF3201:
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF3202:
    		info->flash_id += FLASH_SST320;
    		info->sector_count = 64;
    		info->size = 0x00400000;
    		break;				/* => 4 MB		*/
    
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF6401:
    	case (CFG_FLASH_WORD_SIZE)SST_ID_xF6402:
    		info->flash_id += FLASH_SST640;
    		info->sector_count = 128;
    		info->size = 0x00800000;
    		break;				/* => 8 MB		*/
    #endif
    
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	default:
    		info->flash_id = FLASH_UNKNOWN;
    		return (0);			/* => no or unknown flash */
    
    	}
    
    	/* set up sector start address table */
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
    	    for (i = 0; i < info->sector_count; i++)
    		info->start[i] = base + (i * 0x00010000);
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
    		/* set sector offsets for bottom boot block type	*/
    		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/
    			info->start[i] = base;
    			base += 8 << 10;
    		}
    		while (i < info->sector_count) {	/* 64k regular sectors	*/
    			info->start[i] = base;
    			base += 64 << 10;
    			++i;
    		}
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
    		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
    		/* set sector offsets for top boot block type		*/
    		base += info->size;
    		i = info->sector_count;
    		for (n=0; n<8; ++n) {		/*  8 x 8k boot sectors	*/
    			base -= 8 << 10;
    			--i;
    			info->start[i] = base;
    		}
    		while (i > 0) {			/* 64k regular sectors	*/
    			base -= 64 << 10;
    			--i;
    			info->start[i] = base;
    		}
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	} else {
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	    if (info->flash_id & FLASH_BTYPE) {
    		/* set sector offsets for bottom boot block type	*/
    		info->start[0] = base + 0x00000000;
    		info->start[1] = base + 0x00004000;
    		info->start[2] = base + 0x00006000;
    		info->start[3] = base + 0x00008000;
    		for (i = 4; i < info->sector_count; i++) {
    			info->start[i] = base + (i * 0x00010000) - 0x00030000;
    		}
    	    } else {
    		/* set sector offsets for top boot block type		*/
    		i = info->sector_count - 1;
    		info->start[i--] = base + info->size - 0x00004000;
    		info->start[i--] = base + info->size - 0x00006000;
    		info->start[i--] = base + info->size - 0x00008000;
    		for (; i >= 0; i--) {
    			info->start[i] = base + i * 0x00010000;
    		}
    	    }
    	}
    
    	/* check for protected sectors */
    	for (i = 0; i < info->sector_count; i++) {
    		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
    		/* D0 = 1 if protected */
    		addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
    
    Stefan Roese's avatar
    Stefan Roese committed
    		if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		  info->protect[i] = 0;
    		else
    		  info->protect[i] = addr2[CFG_FLASH_READ2] & 1;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	}
    
    	/*
    	 * Prevent writes to uninitialized FLASH.
    	 */
    	if (info->flash_id != FLASH_UNKNOWN) {
    		addr2 = (CFG_FLASH_WORD_SIZE *)info->start[0];
    		*addr2 = (CFG_FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
    	}
    
    	return (info->size);
    }
    
    
    /*-----------------------------------------------------------------------
     */
    
    int	flash_erase (flash_info_t *info, int s_first, int s_last)
    {
    	volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
    	volatile CFG_FLASH_WORD_SIZE *addr2;
    	int flag, prot, sect, l_sect;
    	ulong start, now, last;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	int i;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    
    	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) {
    		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();
    
    	/* Start erase on unprotected sectors */
    	for (sect = s_first; sect<=s_last; sect++) {
    		if (info->protect[sect] == 0) {	/* not protected */
    		    addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[sect]);
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		    if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
    			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
    			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
    			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
    			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
    			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
    			addr2[0] = (CFG_FLASH_WORD_SIZE)0x00500050;  /* block erase */
    			for (i=0; i<50; i++)
    			  udelay(1000);  /* wait 1 ms */
    		    } else {
    			if (sect == s_first) {
    			    addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
    			    addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
    			    addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
    			    addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
    			    addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
    			}
    			addr2[0] = (CFG_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
    		    }
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		    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 = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);
    	while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x00800080) != (CFG_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 */
    			putc ('.');
    			last = now;
    		}
    	}
    
    DONE:
    	/* reset to read mode */
    	addr = (CFG_FLASH_WORD_SIZE *)info->start[0];
    	addr[0] = (CFG_FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
    
    	printf (" done\n");
    	return 0;
    }
    
    /*-----------------------------------------------------------------------
     * 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)
    {
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
    	volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *)dest;
    	volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *)&data;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	ulong start;
    	int flag;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	int i;
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    
    	/* Check if Flash is (sufficiently) erased */
    
    Stefan Roese's avatar
    Stefan Roese committed
    	if ((*((vu_long *)dest) & data) != data) {
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    		return (2);
    	}
    
    Stefan Roese's avatar
    Stefan Roese committed
    
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	/* Disable interrupts which might cause a timeout here */
    	flag = disable_interrupts();
    
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    	for (i=0; i<4/sizeof(CFG_FLASH_WORD_SIZE); i++)
    	  {
    	    addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
    	    addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
    	    addr2[CFG_FLASH_ADDR0] = (CFG_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] & (CFG_FLASH_WORD_SIZE)0x00800080) !=
    		   (data2[i] & (CFG_FLASH_WORD_SIZE)0x00800080)) {
    	      if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
    		return (1);
    	      }
    	    }
    	  }
    
    Wolfgang Denk's avatar
    Wolfgang Denk committed
    
    	return (0);
    }
    
    /*-----------------------------------------------------------------------
     */