/* * (C) Copyright 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 */#include <common.h>#include <mpc8xx.h>#include <linux/byteorder/swab.h>flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*//*----------------------------------------------------------------------- * Protection Flags: */#define FLAG_PROTECT_SET	0x01#define FLAG_PROTECT_CLEAR	0x02/* Board support for 1 or 2 flash devices */#undef FLASH_PORT_WIDTH32#define FLASH_PORT_WIDTH16#ifdef FLASH_PORT_WIDTH16#define FLASH_PORT_WIDTH		ushort#define FLASH_PORT_WIDTHV		vu_short#define SWAP(x)                         __swab16(x)#else#define FLASH_PORT_WIDTH		ulong#define FLASH_PORT_WIDTHV		vu_long#define SWAP(x)                         __swab32(x)#endif#define FPW	FLASH_PORT_WIDTH#define FPWV	FLASH_PORT_WIDTHV/*----------------------------------------------------------------------- * Functions */static ulong flash_get_size (FPW *addr, flash_info_t *info);static int   write_data (flash_info_t *info, ulong dest, FPW data);static void  flash_get_offsets (ulong base, flash_info_t *info);/*----------------------------------------------------------------------- */unsigned long flash_init (void){	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;	volatile memctl8xx_t *memctl = &immap->im_memctl;	unsigned long size_b0;	int i;	/* Init: no FLASHes known */	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {		flash_info[i].flash_id = FLASH_UNKNOWN;	}	/* Static FLASH Bank configuration here - FIXME XXX */	size_b0 = flash_get_size((FPW *)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",			size_b0, size_b0<<20);	}	/* Remap FLASH according to real size */	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;	/* Re-do sizing to get full correct info */	size_b0 = flash_get_size((FPW *)CFG_FLASH_BASE, &flash_info[0]);	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);	/* monitor protection ON by default */	(void)flash_protect(FLAG_PROTECT_SET,			    CFG_FLASH_BASE,			    CFG_FLASH_BASE+CFG_MONITOR_LEN-1,			    &flash_info[0]);	flash_info[0].size = size_b0;	return (size_b0);}/*----------------------------------------------------------------------- */static void flash_get_offsets (ulong base, flash_info_t *info){	int i;	if (info->flash_id == FLASH_UNKNOWN) {		return;	}	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {		for (i = 0; i < info->sector_count; i++) {			info->start[i] = base + (i * 0x00020000);		}	}}/*----------------------------------------------------------------------- */void flash_print_info  (flash_info_t *info){	int i;	if (info->flash_id == FLASH_UNKNOWN) {		printf ("missing or unknown FLASH type\n");		return;	}	switch (info->flash_id & FLASH_VENDMASK) {		case FLASH_MAN_INTEL:	printf ("INTEL ");		break;		default:		printf ("Unknown Vendor ");	break;	}	switch (info->flash_id & FLASH_TYPEMASK) {   case FLASH_28F640J5 :				printf ("28F640J5 \n"); break;	default:		printf ("Unknown Chip Type=0x%lXh\n",					info->flash_id & FLASH_TYPEMASK); 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) {		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! */static ulong flash_get_size (FPW *addr, flash_info_t *info){	FPW value;	/* Write auto select command: read Manufacturer ID */	addr[0x5555] = (FPW)0xAA00AA00;	addr[0x2AAA] = (FPW)0x55005500;	addr[0x5555] = (FPW)0x90009000;	value = SWAP(addr[0]);   switch (value) {   case (FPW)INTEL_MANUFACT:      info->flash_id = FLASH_MAN_INTEL;      break;	default:		info->flash_id = FLASH_UNKNOWN;		info->sector_count = 0;		info->size = 0;		addr[0] = (FPW)0xFF00FF00;      /* restore read mode */		return (0);			      /* no or unknown flash	*/	}   value = SWAP(addr[1]);			        /* device ID no swap !*/   switch (value) {   case (FPW)INTEL_ID_28F640J5 :        info->flash_id += FLASH_28F640J5 ;        info->sector_count = 64;        info->size = 0x00800000;        break;            /* => 8 MB     */        default:                info->flash_id = FLASH_UNKNOWN;		break;	}	if (info->sector_count > CFG_MAX_FLASH_SECT) {		printf ("** ERROR: sector count %d > max (%d) **\n",			info->sector_count, CFG_MAX_FLASH_SECT);		info->sector_count = CFG_MAX_FLASH_SECT;	}	addr[0] = (FPW)0xFF00FF00;      /* restore read mode */	return (info->size);}/*----------------------------------------------------------------------- */int	flash_erase (flash_info_t *info, int s_first, int s_last){	int flag, prot, sect;	ulong type, 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;	}	type = (info->flash_id & FLASH_VENDMASK);	if ((type != FLASH_MAN_INTEL)) {		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; sect++) {		if (info->protect[sect] == 0) {	/* not protected */			FPWV *addr = (FPWV *)(info->start[sect]);			FPW status;			/* Disable interrupts which might cause a timeout here */			flag = disable_interrupts();			*addr = (FPW)0x50005000;	/* clear status register */			*addr = (FPW)0x20002000;	/* erase setup */			*addr = (FPW)0xD000D000;	/* erase confirm */			/* re-enable interrupts if necessary */			if (flag)				enable_interrupts();			/* wait at least 80us - let's wait 1 ms */			udelay (1000);			while (((status = SWAP(*addr)) & (FPW)0x00800080) != (FPW)0x00800080) {				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {					printf ("Timeout\n");					*addr = (FPW)0xB000B000; /* suspend erase */					*addr = (FPW)0xFF00FF00; /* reset to read mode */					rc = 1;					break;				}				/* show that we're waiting */			if ((now - last) > 1000) {	/* every second */					putc ('.');					last = now;				}			}			*addr = (FPW)0xFF00FF00;	/* reset to read mode */			printf (" done\n");		}	}	return rc;}/*----------------------------------------------------------------------- * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased * 4 - Flash not identified */int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt){	ulong cp, wp;	FPW data;	int count, i, l, rc, port_width;	if (info->flash_id == FLASH_UNKNOWN) {		return 4;	}/* get lower word aligned address */#ifdef FLASH_PORT_WIDTH16	wp = (addr & ~1);	port_width = 2;#else	wp = (addr & ~3);	port_width = 4;#endif	/*	 * 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<port_width && cnt>0; ++i) {			data = (data << 8) | *src++;			--cnt;			++cp;		}		for (; cnt==0 && i<port_width; ++i, ++cp) {			data = (data << 8) | (*(uchar *)cp);		}		if ((rc = write_data(info, wp, data)) != 0) {			return (rc);		}		wp += port_width;	}	/*	 * handle word aligned part	 */	count = 0;	while (cnt >= port_width) {		data = 0;		for (i=0; i<port_width; ++i) {			data = (data << 8) | *src++;		}		if ((rc = write_data(info, wp, data)) != 0) {			return (rc);		}		wp  += port_width;		cnt -= port_width;		if ((wp & 0xfff) == 0)		{			printf("%08lX",wp);			printf("\x1b[8D");		}	}	if (cnt == 0) {		return (0);	}	/*	 * handle unaligned tail bytes	 */	data = 0;	for (i=0, cp=wp; i<port_width && cnt>0; ++i, ++cp) {		data = (data << 8) | *src++;		--cnt;	}	for (; i<port_width; ++i, ++cp) {		data = (data << 8) | (*(uchar *)cp);	}	return (write_data(info, wp, data));}/*----------------------------------------------------------------------- * Write a word or halfword to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */static int write_data (flash_info_t *info, ulong dest, FPW data){	FPWV *addr = (FPWV *)dest;	ulong status;	ulong start;	int flag;	/* Check if Flash is (sufficiently) erased */	if ((*addr & data) != data) {		printf("not erased at %08lx (%x)\n",(ulong)addr,*addr);		return (2);	}	/* Disable interrupts which might cause a timeout here */	flag = disable_interrupts();	*addr = (FPW)0x40004000;		/* write setup */	*addr = data;	/* re-enable interrupts if necessary */	if (flag)		enable_interrupts();	start = get_timer (0);	while (((status = SWAP(*addr)) & (FPW)0x00800080) != (FPW)0x00800080) {		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {			*addr = (FPW)0xFF00FF00;	/* restore read mode */			return (1);		}	}	*addr = (FPW)0xFF00FF00;	/* restore read mode */	return (0);}