/* * (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 */#include <common.h>#include <linux/byteorder/swab.h>flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips    *//* Board support for 1 or 2 flash devices */#define FLASH_PORT_WIDTH32#undef 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#define mb() __asm__ __volatile__ ("" : : : "memory")/*----------------------------------------------------------------------- * 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);void inline spin_wheel (void);/*----------------------------------------------------------------------- */unsigned long flash_init (void){	int i;	ulong size = 0;	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {		switch (i) {		case 0:			flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);			flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);			break;		case 1:			flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);			flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);			break;		default:			panic ("configured too many flash banks!\n");			break;		}		size += flash_info[i].size;	}	/* Protect monitor and environment sectors	 */	flash_protect ( FLAG_PROTECT_SET,			CFG_FLASH_BASE,			CFG_FLASH_BASE + monitor_flash_len - 1,			&flash_info[0] );	flash_protect ( FLAG_PROTECT_SET,			CFG_ENV_ADDR,			CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );	return size;}/*----------------------------------------------------------------------- */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 * PHYS_FLASH_SECT_SIZE);			info->protect[i] = 0;		}	}}/*----------------------------------------------------------------------- */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_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){	volatile FPW value;	/* Write auto select command: read Manufacturer ID */	addr[0x5555] = (FPW) 0x00AA00AA;	addr[0x2AAA] = (FPW) 0x00550055;	addr[0x5555] = (FPW) 0x00900090;	mb ();	value = 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) 0x00FF00FF;	/* restore read mode */		return (0);			/* no or unknown flash  */	}	mb ();	value = addr[1];			/* device ID        */	switch (value) {	case (FPW) INTEL_ID_28F128J3A:		info->flash_id += FLASH_28F128J3A;		info->sector_count = 128;		info->size = 0x02000000;		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, 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;	/* 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 */			FPWV *addr = (FPWV *) (info->start[sect]);			FPW status;			printf ("Erasing sector %2d ... ", sect);			/* arm simple, non interrupt dependent timer */			reset_timer_masked ();			*addr = (FPW) 0x00500050;	/* clear status register */			*addr = (FPW) 0x00200020;	/* erase setup */			*addr = (FPW) 0x00D000D0;	/* erase confirm */			while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {				if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {					printf ("Timeout\n");					*addr = (FPW) 0x00B000B0;	/* suspend erase     */					*addr = (FPW) 0x00FF00FF;	/* reset to read mode */					rcode = 1;					break;				}			}			*addr = 0x00500050;	/* clear status register cmd.   */			*addr = 0x00FF00FF;	/* resest 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 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, SWAP (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, SWAP (data))) != 0) {			return (rc);		}		wp += port_width;		cnt -= port_width;		if (count++ > 0x800) {			spin_wheel ();			count = 0;		}	}	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, SWAP (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;	int flag;	/* Check if Flash is (sufficiently) erased */	if ((*addr & data) != data) {		printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);		return (2);	}	/* Disable interrupts which might cause a timeout here */	flag = disable_interrupts ();	*addr = (FPW) 0x00400040;	/* write setup */	*addr = data;	/* arm simple, non interrupt dependent timer */	reset_timer_masked ();	/* wait while polling the status register */	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {		if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {			*addr = (FPW) 0x00FF00FF;	/* restore read mode */			return (1);		}	}	*addr = (FPW) 0x00FF00FF;	/* restore read mode */	return (0);}void inline spin_wheel (void){	static int p = 0;	static char w[] = "\\/-";	printf ("\010%c", w[p]);	(++p == 3) ? (p = 0) : 0;}