text: /*
   * (C) Copyright 2000, 2001
   * 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
   */
  
  /*
   * Modified 4/5/2001
   * Wait for completion of each sector erase command issued
   * 4/5/2001
   * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
   */
  
  /*
   * Modified 3/7/2001
   * - adapted for pip405, Denis Peter, MPL AG Switzerland
   * TODO:
   * clean-up
   */
  
  #include <common.h>
  
  #if !defined(CONFIG_PATI)
  #include <ppc4xx.h>
  #include <asm/processor.h>
  #include "common_util.h"
  #if defined(CONFIG_MIP405)
  #include "../mip405/mip405.h"
  #endif
  #if defined(CONFIG_PIP405)
  #include "../pip405/pip405.h"
  #endif
  #include <asm/4xx_pci.h>
  #else /* defined(CONFIG_PATI) */
  #include <mpc5xx.h>
  #endif
  
  flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
  /*-----------------------------------------------------------------------
   * Functions
   */
  static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  static int write_word (flash_info_t *info, ulong dest, ulong data);
  
  void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt);
  
  #define ADDR0           0x5555
  #define ADDR1           0x2aaa
  #define FLASH_WORD_SIZE unsigned short
  
  #define FALSE           0
  #define TRUE            1
  
  #if !defined(CONFIG_PATI)
  
  /*-----------------------------------------------------------------------
   * Some CS switching routines:
   *
   * On PIP/MIP405 we have 3 (4) possible boot mode
   *
   * - Boot from Flash (Flash CS = CS0, MPS CS = CS1)
   * - Boot from MPS   (Flash CS = CS1, MPS CS = CS0)
   * - Boot from PCI with Flash map (Flash CS = CS0, MPS CS = CS1)
   * - Boot from PCI with MPS map   (Flash CS = CS1, MPS CS = CS0)
   * The flash init is the first board specific routine which is called
   * after code relocation (running from SDRAM)
   * The first thing we do is to map the Flash CS to the Flash area and
   * the MPS CS to the MPS area. Since the flash size is unknown at this
   * point, we use the max flash size and the lowest flash address as base.
   *
   * After flash detection we adjust the size of the CS area accordingly.
   * The board_init_r will fill in wrong values in the board init structure,
   * but this will be fixed in the misc_init_r routine:
   * bd->bi_flashstart=0-flash_info[0].size
   * bd->bi_flashsize=flash_info[0].size-CONFIG_SYS_MONITOR_LEN
   * bd->bi_flashoffset=0
   *
   */
  int get_boot_mode(void)
  {
  	unsigned long pbcr;
  	int res = 0;
  	pbcr = mfdcr (strap);
  	if ((pbcr & PSR_ROM_WIDTH_MASK) == 0)
  		/* boot via MPS or MPS mapping */
  		res = BOOT_MPS;
  	if(pbcr & PSR_ROM_LOC)
  		/* boot via PCI.. */
  		res |= BOOT_PCI;
  	 return res;
  }
  
  /* Map the flash high (in boot area)
     This code can only be executed from SDRAM (after relocation).
  */
  void setup_cs_reloc(void)
  {
  	int mode;
  	/* Since we are relocated, we can set-up the CS finaly
  	 * but first of all, switch off PCI mapping (in case it was a PCI boot) */
  	out32r(PMM0MA,0L);
  	icache_enable (); /* we are relocated */
  	/* get boot mode */
  	mode=get_boot_mode();
  	/* we map the flash high in every case */
  	/* first findout on which cs the flash is */
  	if(mode & BOOT_MPS) {
  		/* map flash high on CS1 and MPS on CS0 */
  		mtdcr (ebccfga, pb0ap);
  		mtdcr (ebccfgd, MPS_AP);
  		mtdcr (ebccfga, pb0cr);
  		mtdcr (ebccfgd, MPS_CR);
  		/* we use the default values (max values) for the flash
  		 * because its real size is not yet known */
  		mtdcr (ebccfga, pb1ap);
  		mtdcr (ebccfgd, FLASH_AP);
  		mtdcr (ebccfga, pb1cr);
  		mtdcr (ebccfgd, FLASH_CR_B);
  	}
  	else {
  		/* map flash high on CS0 and MPS on CS1 */
  		mtdcr (ebccfga, pb1ap);
  		mtdcr (ebccfgd, MPS_AP);
  		mtdcr (ebccfga, pb1cr);
  		mtdcr (ebccfgd, MPS_CR);
  		/* we use the default values (max values) for the flash
  		 * because its real size is not yet known */
  		mtdcr (ebccfga, pb0ap);
  		mtdcr (ebccfgd, FLASH_AP);
  		mtdcr (ebccfga, pb0cr);
  		mtdcr (ebccfgd, FLASH_CR_B);
  	}
  }
  
  #endif /* #if !defined(CONFIG_PATI) */
  
  unsigned long flash_init (void)
  {
  	unsigned long size_b0;
  	int i;
  
  #if !defined(CONFIG_PATI)
  	unsigned long size_b1,flashcr,size_reg;
  	int mode;
  	extern char version_string;
  	char *p = &version_string;
  
  	/* Since we are relocated, we can set-up the CS finally */
  	setup_cs_reloc();
  	/* get and display boot mode */
  	mode=get_boot_mode();
  	if(mode & BOOT_PCI)
  		printf("(PCI Boot %s Map) ",(mode & BOOT_MPS) ?
  			"MPS" : "Flash");
  	else
  		printf("(%s Boot) ",(mode & BOOT_MPS) ?
  			"MPS" : "Flash");
  #endif /* #if !defined(CONFIG_PATI) */
  	/* Init: no FLASHes known */
  	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  		flash_info[i].flash_id = FLASH_UNKNOWN;
  	}
  
  	/* Static FLASH Bank configuration here - FIXME XXX */
  
  	size_b0 = flash_get_size((vu_long *)CONFIG_SYS_MONITOR_BASE, &flash_info[0]);
  
  	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  			size_b0, size_b0<<20);
  	}
  	/* protect the bootloader */
  	/* Monitor protection ON by default */
  #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  	flash_protect(FLAG_PROTECT_SET,
  			CONFIG_SYS_MONITOR_BASE,
  			CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  			&flash_info[0]);
  #endif
  #if !defined(CONFIG_PATI)
  	/* protect reset vector */
  	flash_info[0].protect[flash_info[0].sector_count-1] = 1;
  	size_b1 = 0 ;
  	flash_info[0].size = size_b0;
  	/* set up flash cs according to the size */
  	size_reg=(flash_info[0].size >>20);
  	switch (size_reg) {
  		case 0:
  		case 1: i=0; break; /* <= 1MB */
  		case 2: i=1; break; /* = 2MB */
  		case 4: i=2; break; /* = 4MB */
  		case 8: i=3; break; /* = 8MB */
  		case 16: i=4; break; /* = 16MB */
  		case 32: i=5; break; /* = 32MB */
  		case 64: i=6; break; /* = 64MB */
  		case 128: i=7; break; /*= 128MB */
  		default:
  			printf("\n #### ERROR, wrong size %ld MByte reset board #####\n",size_reg);
  			while(1);
  	}
  	if(mode & BOOT_MPS) {
  		/* flash is on CS1 */
  		mtdcr(ebccfga, pb1cr);
  		flashcr = mfdcr (ebccfgd);
  		/* we map the flash high in every case */
  		flashcr&=0x0001FFFF; /* mask out address bits */
  		flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
  		flashcr|= (i << 17); /* size addr */
  		mtdcr(ebccfga, pb1cr);
  		mtdcr(ebccfgd, flashcr);
  	}
  	else {
  		/* flash is on CS0 */
  		mtdcr(ebccfga, pb0cr);
  		flashcr = mfdcr (ebccfgd);
  		/* we map the flash high in every case */
  		flashcr&=0x0001FFFF; /* mask out address bits */
  		flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
  		flashcr|= (i << 17); /* size addr */
  		mtdcr(ebccfga, pb0cr);
  		mtdcr(ebccfgd, flashcr);
  	}
  #if 0
  	/* enable this (PIP405/MIP405 only) if you want to test if
  	   the relocation has be done ok.
  	   This will disable both Chipselects */
  	mtdcr (ebccfga, pb0cr);
  	mtdcr (ebccfgd, 0L);
  	mtdcr (ebccfga, pb1cr);
  	mtdcr (ebccfgd, 0L);
  	printf("CS0 & CS1 switched off for test\n");
  #endif
  	/* patch version_string */
  	for(i=0;i<0x100;i++) {
  		if(*p=='\n') {
  			*p=0;
  			break;
  		}
  		p++;
  	}
  #else /* #if !defined(CONFIG_PATI) */
  #ifdef	CONFIG_ENV_IS_IN_FLASH
  	/* ENV protection ON by default */
  	flash_protect(FLAG_PROTECT_SET,
  		      CONFIG_ENV_ADDR,
  		      CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
  		      &flash_info[0]);
  #endif
  #endif /* #if !defined(CONFIG_PATI) */
  	return (size_b0);
  }
  
  
  /*-----------------------------------------------------------------------
   */
  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");
  		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;
  	case FLASH_MAN_INTEL:	printf ("Intel ");		break;
  	default:		printf ("Unknown Vendor ");	break;
  	}
  
  	switch (info->flash_id & FLASH_TYPEMASK) {
  	case FLASH_AM040:	printf ("AM29F040 (512 Kbit, uniform sector size)\n");
  				break;
  	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_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
  				break;
  	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot 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;
  	case FLASH_INTEL320T:	printf ("TE28F320C3 (32 Mbit, top sector size)\n");
  				break;
  	case FLASH_AM640U:	printf ("AM29LV640U (64 Mbit, uniform sector size)\n");
  				break;
  	default:		printf ("Unknown Chip Type\n");
  				break;
  	}
  
  	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!
   */
  static ulong flash_get_size (vu_long *addr, flash_info_t *info)
  {
  	short i;
  	FLASH_WORD_SIZE value;
  	ulong base;
  	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
  
  	/* Write auto select command: read Manufacturer ID */
  	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
  	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
  	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
  
  	value = addr2[0];
  	/*	printf("flash_get_size value: %x\n",value); */
  	switch (value) {
  	case (FLASH_WORD_SIZE)AMD_MANUFACT:
  		info->flash_id = FLASH_MAN_AMD;
  		break;
  	case (FLASH_WORD_SIZE)FUJ_MANUFACT:
  		info->flash_id = FLASH_MAN_FUJ;
  		break;
  	case (FLASH_WORD_SIZE)INTEL_MANUFACT:
  		info->flash_id = FLASH_MAN_INTEL;
  		break;
  	case (FLASH_WORD_SIZE)SST_MANUFACT:
  		info->flash_id = FLASH_MAN_SST;
  		break;
  	default:
  		info->flash_id = FLASH_UNKNOWN;
  		info->sector_count = 0;
  		info->size = 0;
  		return (0);			/* no or unknown flash	*/
  	}
  	value = addr2[1];			/* device ID		*/
  	/*	printf("Device value %x\n",value);		    */
  	switch (value) {
  	case (FLASH_WORD_SIZE)AMD_ID_F040B:
  		info->flash_id += FLASH_AM040;
  		info->sector_count = 8;
  		info->size = 0x0080000; /* => 512 ko */
  		break;
  	case (FLASH_WORD_SIZE)AMD_ID_LV400T:
  		info->flash_id += FLASH_AM400T;
  		info->sector_count = 11;
  		info->size = 0x00080000;
  		break;				/* => 0.5 MB		*/
  
  	case (FLASH_WORD_SIZE)AMD_ID_LV400B:
  		info->flash_id += FLASH_AM400B;
  		info->sector_count = 11;
  		info->size = 0x00080000;
  		break;				/* => 0.5 MB		*/
  
  	case (FLASH_WORD_SIZE)AMD_ID_LV800T:
  		info->flash_id += FLASH_AM800T;
  		info->sector_count = 19;
  		info->size = 0x00100000;
  		break;				/* => 1 MB		*/
  
  	case (FLASH_WORD_SIZE)AMD_ID_LV800B:
  		info->flash_id += FLASH_AM800B;
  		info->sector_count = 19;
  		info->size = 0x00100000;
  		break;				/* => 1 MB		*/
  
  	case (FLASH_WORD_SIZE)AMD_ID_LV160T:
  		info->flash_id += FLASH_AM160T;
  		info->sector_count = 35;
  		info->size = 0x00200000;
  		break;				/* => 2 MB		*/
  
  	case (FLASH_WORD_SIZE)AMD_ID_LV160B:
  		info->flash_id += FLASH_AM160B;
  		info->sector_count = 35;
  		info->size = 0x00200000;
  		break;				/* => 2 MB		*/
  	case (FLASH_WORD_SIZE)AMD_ID_LV320T:
  		info->flash_id += FLASH_AM320T;
  		info->sector_count = 67;
  		info->size = 0x00400000;
  		break;				/* => 4 MB		*/
  	case (FLASH_WORD_SIZE)AMD_ID_LV640U:
  		info->flash_id += FLASH_AM640U;
  		info->sector_count = 128;
  		info->size = 0x00800000;
  		break;				/* => 8 MB		*/
  #if 0	/* enable when device IDs are available */
  
  	case (FLASH_WORD_SIZE)AMD_ID_LV320B:
  		info->flash_id += FLASH_AM320B;
  		info->sector_count = 67;
  		info->size = 0x00400000;
  		break;				/* => 4 MB		*/
  #endif
  	case (FLASH_WORD_SIZE)SST_ID_xF800A:
  		info->flash_id += FLASH_SST800A;
  		info->sector_count = 16;
  		info->size = 0x00100000;
  		break;				/* => 1 MB		*/
  	case (FLASH_WORD_SIZE)INTEL_ID_28F320C3T:
  		info->flash_id += FLASH_INTEL320T;
  		info->sector_count = 71;
  		info->size = 0x00400000;
  		break;				/* => 4 MB		*/
  
  
  	case (FLASH_WORD_SIZE)SST_ID_xF160A:
  		info->flash_id += FLASH_SST160A;
  		info->sector_count = 32;
  		info->size = 0x00200000;
  		break;				/* => 2 MB		*/
  
  	default:
  		info->flash_id = FLASH_UNKNOWN;
  		return (0);			/* => no or unknown flash */
  
  	}
  	/* base address calculation */
  	base=0-info->size;
  	/* set up sector start address table */
  	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
  	     (info->flash_id  == FLASH_AM040) ||
  	     (info->flash_id  == FLASH_AM640U)){
  		for (i = 0; i < info->sector_count; i++)
  			info->start[i] = base + (i * 0x00010000);
  	}
  	else {
  		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;
  			if(info->sector_count==71) {
  
  				info->start[i--] = base + info->size - 0x00002000;
  				info->start[i--] = base + info->size - 0x00004000;
  				info->start[i--] = base + info->size - 0x00006000;
  				info->start[i--] = base + info->size - 0x00008000;
  				info->start[i--] = base + info->size - 0x0000A000;
  				info->start[i--] = base + info->size - 0x0000C000;
  				info->start[i--] = base + info->size - 0x0000E000;
  				for (; i >= 0; i--)
  					info->start[i] = base + i * 0x000010000;
  			}
  			else {
  				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 FLASH_WORD_SIZE *)(info->start[i]);
  		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
  			info->protect[i] = 0;
  		else
  			info->protect[i] = addr2[2] & 1;
  	}
  
  	/*
  	 * Prevent writes to uninitialized FLASH.
  	 */
  	if (info->flash_id != FLASH_UNKNOWN) {
  		addr2 = (FLASH_WORD_SIZE *)info->start[0];
  		*addr2 = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
  	}
  	return (info->size);
  }
  
  
  int wait_for_DQ7(flash_info_t *info, int sect)
  {
  	ulong start, now, last;
  	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
  
  	start = get_timer (0);
  	last  = start;
  	while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
  		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
  			printf ("Timeout\n");
  			return ERR_TIMOUT;
  		}
  		/* show that we're waiting */
  		if ((now - last) > 1000) {  /* every second */
  			putc ('.');
  			last = now;
  		}
  	}
  	return ERR_OK;
  }
  
  int intel_wait_for_DQ7(flash_info_t *info, int sect)
  {
  	ulong start, now, last, status;
  	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
  
  	start = get_timer (0);
  	last  = start;
  	while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
  		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
  			printf ("Timeout\n");
  			return ERR_TIMOUT;
  		}
  		/* show that we're waiting */
  		if ((now - last) > 1000) {  /* every second */
  			putc ('.');
  			last = now;
  		}
  	}
  	status = addr[0] & (FLASH_WORD_SIZE)0x00280028;
  	/* clear status register */
  	addr[0] = (FLASH_WORD_SIZE)0x00500050;
  	/* check status for block erase fail and VPP low */
  	return (status == 0 ? ERR_OK : ERR_NOT_ERASED);
  }
  
  /*-----------------------------------------------------------------------
   */
  
  int	flash_erase (flash_info_t *info, int s_first, int s_last)
  {
  	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
  	volatile FLASH_WORD_SIZE *addr2;
  	int flag, prot, sect, l_sect;
  	int i, 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;
  	}
  
  	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 = (FLASH_WORD_SIZE *)(info->start[sect]);
  			/*  printf("Erasing sector %p\n", addr2); */ /* CLH */
  			if ((info->flash_id & FLASH_VENDMASK) == 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;
  				addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
  				for (i=0; i<50; i++)
  					udelay(1000);  /* wait 1 ms */
  				rcode |= wait_for_DQ7(info, sect);
  			}
  			else {
  				if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
  					addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector */
  					addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
  					intel_wait_for_DQ7(info, sect);
  					addr2[0] = (FLASH_WORD_SIZE)0x00200020;  /* sector erase */
  					addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
  					rcode |= intel_wait_for_DQ7(info, sect);
  				}
  				else {
  					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;
  					addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
  					rcode |= wait_for_DQ7(info, sect);
  				}
  			}
  			l_sect = sect;
  			/*
  			 * Wait for each sector to complete, it's more
  			 * reliable.  According to AMD Spec, you must
  			 * issue all erase commands within a specified
  			 * timeout.  This has been seen to fail, especially
  			 * if printf()s are included (for debug)!!
  			 */
  			/*   wait_for_DQ7(info, sect); */
  		}
  	}
  
  	/* re-enable interrupts if necessary */
  	if (flag)
  		enable_interrupts();
  
  	/* wait at least 80us - let's wait 1 ms */
  	udelay (1000);
  
  #if 0
  	/*
  	 * We wait for the last triggered sector
  	 */
  	if (l_sect < 0)
  		goto DONE;
  	wait_for_DQ7(info, l_sect);
  
  DONE:
  #endif
  	/* reset to read mode */
  	addr = (FLASH_WORD_SIZE *)info->start[0];
  	addr[0] = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
  
  	if (!rcode)
  	    printf (" done\n");
  
  	return rcode;
  }
  
  
  void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt)
  {
  	int i;
  	volatile FLASH_WORD_SIZE *addr2;
  	long c;
  	c= (long)cnt;
  	for(i=info->sector_count-1;i>0;i--)
  	{
  		if(addr>=info->start[i])
  			break;
  	}
  	do {
  		addr2 = (FLASH_WORD_SIZE *)(info->start[i]);
  		addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector setup */
  		addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* unlock sector */
  		intel_wait_for_DQ7(info, i);
  		i++;
  		c-=(info->start[i]-info->start[i-1]);
  	}while(c>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;
  
  	if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
  		unlock_intel_sectors(info,addr,cnt);
  	}
  	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;
  		if((wp % 0x10000)==0)
  			printf("."); /* show Progress */
  		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);
  	}
  	rc=write_word(info, wp, data);
  	return rc;
  }
  
  /*-----------------------------------------------------------------------
   * Write a word to Flash, returns:
   * 0 - OK
   * 1 - write timeout
   * 2 - Flash not erased
   */
  static FLASH_WORD_SIZE *read_val = (FLASH_WORD_SIZE *)0x200000;
  
  static int write_word (flash_info_t *info, ulong dest, ulong data)
  {
  	volatile FLASH_WORD_SIZE *addr2 = (volatile FLASH_WORD_SIZE *)(info->start[0]);
  	volatile FLASH_WORD_SIZE *dest2 = (volatile FLASH_WORD_SIZE *)dest;
  	volatile FLASH_WORD_SIZE *data2;
  	ulong start;
  	ulong *data_p;
  	int flag;
  	int i;
  
  	data_p = &data;
  	data2 = (volatile FLASH_WORD_SIZE *)data_p;
  
  	/* 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++)
  	{
  		if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
  			/* intel style writting */
  			dest2[i] = (FLASH_WORD_SIZE)0x00500050;
  			dest2[i] = (FLASH_WORD_SIZE)0x00400040;
  			*read_val++ = data2[i];
  			dest2[i] = data2[i];
  			if (flag)
  				enable_interrupts();
  			/* data polling for D7 */
  			start = get_timer (0);
  			udelay(10);
  			while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080)
  			{
  				if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
  					return (1);
  			}
  			dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
  			udelay(10);
  			dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
  			if(dest2[i]!=data2[i])
  				printf("Error at %p 0x%04X != 0x%04X\n",&dest2[i],dest2[i],data2[i]);
  		}
  		else {
  			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) > CONFIG_SYS_FLASH_WRITE_TOUT) {
  					return (1);
  				}
  			}
  		}
  	}
  	return (0);
  }
  
  /*-----------------------------------------------------------------------
   */
  