/* * (C) Copyright 2001 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net * * (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 *//* #define DEBUG */#include <common.h>#include <mpc8xx.h>flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips    */#if defined(CFG_ENV_IS_IN_FLASH)# ifndef  CFG_ENV_ADDR#  define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)# endif# ifndef  CFG_ENV_SIZE#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE# endif# ifndef  CFG_ENV_SECT_SIZE#  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE# endif#endif/*----------------------------------------------------------------------- * 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#else#define FLASH_PORT_WIDTH	ulong#define FLASH_PORT_WIDTHV	vu_long#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]);#if CFG_MONITOR_BASE >= CFG_FLASH_BASE	/* monitor protection ON by default */	(void) flash_protect (FLAG_PROTECT_SET,				CFG_FLASH_BASE,				CFG_FLASH_BASE + monitor_flash_len - 1,				&flash_info[0]);#endif#ifdef	CFG_ENV_IS_IN_FLASH	/* ENV protection ON by default */	flash_protect (FLAG_PROTECT_SET,			CFG_ENV_ADDR,			CFG_ENV_ADDR + CFG_ENV_SIZE - 1,			&flash_info[0]);#endif	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_28F320J3A:		printf ("28F320J3A\n");		break;	case FLASH_28F640J3A:		printf ("28F640J3A\n");		break;	case FLASH_28F128J3A:		printf ("28F128J3A\n");		break;	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) {		if ((i % 5) == 0)			printf ("\n   ");		printf (" %08lX%s",			info->start[i],			info->protect[i] ? " (RO)" : "     ");	}	printf ("\n");	return;}/*----------------------------------------------------------------------- *//*----------------------------------------------------------------------- *//* * The following code cannot be run from FLASH! */static ulong flash_get_size (FPW * addr, flash_info_t * info){	FPW value;	/* Make sure Block Lock Bits get cleared */	addr[0] = (FPW) 0x00FF00FF;	addr[0] = (FPW) 0x00600060;	addr[0] = (FPW) 0x00D000D0;	addr[0] = (FPW) 0x00FF00FF;	/* Write auto select command: read Manufacturer ID */	addr[0x5555] = (FPW) 0x00AA00AA;	addr[0x2AAA] = (FPW) 0x00550055;	addr[0x5555] = (FPW) 0x00900090;	value = addr[0];	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);	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) 0x00FF00FF;	/* restore read mode */		return (0);			/* no or unknown flash  */	}	value = addr[1];			/* device ID        */	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);	switch (value) {	case (FPW) INTEL_ID_28F320J3A:		info->flash_id += FLASH_28F320J3A;		info->sector_count = 32;		info->size = 0x00400000;		break;				/* => 4 MB     */	case (FPW) INTEL_ID_28F640J3A:		info->flash_id += FLASH_28F640J3A;		info->sector_count = 64;		info->size = 0x00800000;		break;				/* => 8 MB     */	case (FPW) INTEL_ID_28F128J3A:		info->flash_id += FLASH_28F128J3A;		info->sector_count = 128;		info->size = 0x01000000;		break;				/* => 16 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) 0x00FF00FF;	/* 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 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;	}	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) 0x00500050;	/* clear status register */			*addr = (FPW) 0x00200020;	/* erase setup */			*addr = (FPW) 0x00D000D0;	/* erase confirm */			/* re-enable interrupts if necessary */			if (flag)				enable_interrupts ();			/* wait at least 80us - let's wait 1 ms */			udelay (1000);			while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {			    if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {				printf ("Timeout\n");				*addr = (FPW) 0x00B000B0;	/* suspend erase     */				*addr = (FPW) 0x00FF00FF;	/* reset to read mode */				rcode = 1;				break;			    }			    /* show that we're waiting */			    if ((now - last) > 1000) {	/* every second */				putc ('.');				last = now;			    }			}			*addr = (FPW) 0x00FF00FF;	/* reset to read mode */		}	}	printf (" done\n");	return rcode;}/*----------------------------------------------------------------------- * 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 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	 */	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 (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) 0x00400040;	/* write setup */	*addr = data;	/* re-enable interrupts if necessary */	if (flag)		enable_interrupts ();	start = get_timer (0);	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {			*addr = (FPW) 0x00FF00FF;	/* restore read mode */			return (1);		}	}	*addr = (FPW) 0x00FF00FF;	/* restore read mode */	return (0);}