/* * (C) Copyright 2001, 2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Flash Routines for AMD devices on the TQM8260 board * *-------------------------------------------------------------------- * 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>#define V_ULONG(a)	(*(volatile unsigned long *)( a ))#define V_BYTE(a)	(*(volatile unsigned char *)( a ))flash_info_t flash_info[CFG_MAX_FLASH_BANKS];/*----------------------------------------------------------------------- */void flash_reset (void){	if (flash_info[0].flash_id != FLASH_UNKNOWN) {		V_ULONG (flash_info[0].start[0]) = 0x00F000F0;		V_ULONG (flash_info[0].start[0] + 4) = 0x00F000F0;	}}/*----------------------------------------------------------------------- */ulong flash_get_size (ulong baseaddr, flash_info_t * info){	short i;	unsigned long flashtest_h, flashtest_l;	/* Write auto select command sequence and test FLASH answer */	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00AA00AA;	V_ULONG (baseaddr + ((ulong) 0x02AA << 3)) = 0x00550055;	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00900090;	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00AA00AA;	V_ULONG (baseaddr + 4 + ((ulong) 0x02AA << 3)) = 0x00550055;	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00900090;	flashtest_h = V_ULONG (baseaddr);	/* manufacturer ID     */	flashtest_l = V_ULONG (baseaddr + 4);	switch ((int) flashtest_h) {	case AMD_MANUFACT:		info->flash_id = FLASH_MAN_AMD;		break;	case FUJ_MANUFACT:		info->flash_id = FLASH_MAN_FUJ;		break;	default:		info->flash_id = FLASH_UNKNOWN;		info->sector_count = 0;		info->size = 0;		return (0);			/* no or unknown flash     */	}	flashtest_h = V_ULONG (baseaddr + 8);	/* device ID           */	flashtest_l = V_ULONG (baseaddr + 12);	if (flashtest_h != flashtest_l) {		info->flash_id = FLASH_UNKNOWN;	} else {		switch (flashtest_h) {		case AMD_ID_LV800T:			info->flash_id += FLASH_AM800T;			info->sector_count = 19;			info->size = 0x00400000;			break;			/* 4 * 1 MB = 4 MB  */		case AMD_ID_LV800B:			info->flash_id += FLASH_AM800B;			info->sector_count = 19;			info->size = 0x00400000;			break;			/* 4 * 1 MB = 4 MB  */		case AMD_ID_LV160T:			info->flash_id += FLASH_AM160T;			info->sector_count = 35;			info->size = 0x00800000;			break;			/* 4 * 2 MB = 8 MB  */		case AMD_ID_LV160B:			info->flash_id += FLASH_AM160B;			info->sector_count = 35;			info->size = 0x00800000;			break;			/* 4 * 2 MB = 8 MB  */		case AMD_ID_DL322T:			info->flash_id += FLASH_AMDL322T;			info->sector_count = 71;			info->size = 0x01000000;			break;			/* 4 * 4 MB = 16 MB */		case AMD_ID_DL322B:			info->flash_id += FLASH_AMDL322B;			info->sector_count = 71;			info->size = 0x01000000;			break;			/* 4 * 4 MB = 16 MB */		case AMD_ID_DL323T:			info->flash_id += FLASH_AMDL323T;			info->sector_count = 71;			info->size = 0x01000000;			break;			/* 4 * 4 MB = 16 MB */		case AMD_ID_DL323B:			info->flash_id += FLASH_AMDL323B;			info->sector_count = 71;			info->size = 0x01000000;			break;			/* 4 * 4 MB = 16 MB */		case AMD_ID_LV640U:			info->flash_id += FLASH_AM640U;			info->sector_count = 128;			info->size = 0x02000000;			break;			/* 4 * 8 MB = 32 MB */		default:			info->flash_id = FLASH_UNKNOWN;			return (0);		/* no or unknown flash     */		}	}	if (flashtest_h == AMD_ID_LV640U) {		/* set up sector start adress table (uniform sector type) */		for (i = 0; i < info->sector_count; i++)			info->start[i] = baseaddr + (i * 0x00040000);	} else if (info->flash_id & FLASH_BTYPE) {		/* set up sector start adress table (bottom sector type) */		info->start[0] = baseaddr + 0x00000000;		info->start[1] = baseaddr + 0x00010000;		info->start[2] = baseaddr + 0x00018000;		info->start[3] = baseaddr + 0x00020000;		for (i = 4; i < info->sector_count; i++) {			info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;		}	} else {		/* set up sector start adress table (top sector type) */		i = info->sector_count - 1;		info->start[i--] = baseaddr + info->size - 0x00010000;		info->start[i--] = baseaddr + info->size - 0x00018000;		info->start[i--] = baseaddr + info->size - 0x00020000;		for (; i >= 0; i--) {			info->start[i] = baseaddr + i * 0x00040000;		}	}	/* check for protected sectors */	for (i = 0; i < info->sector_count; i++) {		/* read sector protection at sector address, (A7 .. A0) = 0x02 */		if ((V_ULONG (info->start[i] + 16) & 0x00010001) ||			(V_ULONG (info->start[i] + 20) & 0x00010001)) {			info->protect[i] = 1;	/* D0 = 1 if protected */		} else {			info->protect[i] = 0;		}	}	flash_reset ();	return (info->size);}/*----------------------------------------------------------------------- */unsigned long flash_init (void){	unsigned long size_b0 = 0;	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 (only one bank) */	size_b0 = flash_get_size (CFG_FLASH0_BASE, &flash_info[0]);	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",				size_b0, size_b0 >> 20);	}	/*	 * protect monitor and environment sectors	 */#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE	flash_protect (FLAG_PROTECT_SET,		       CFG_MONITOR_BASE,		       CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);#endif#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)# ifndef  CFG_ENV_SIZE#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE# endif	flash_protect (FLAG_PROTECT_SET,		       CFG_ENV_ADDR,		       CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);#endif	return (size_b0);}/*----------------------------------------------------------------------- */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_AMD:		printf ("AMD ");		break;	case FLASH_MAN_FUJ:		printf ("FUJITSU ");		break;	default:		printf ("Unknown Vendor ");		break;	}	switch (info->flash_id & FLASH_TYPEMASK) {	case FLASH_AM800T:		printf ("29LV800T (8 M, top sector)\n");		break;	case FLASH_AM800B:		printf ("29LV800T (8 M, bottom sector)\n");		break;	case FLASH_AM160T:		printf ("29LV160T (16 M, top sector)\n");		break;	case FLASH_AM160B:		printf ("29LV160B (16 M, bottom sector)\n");		break;	case FLASH_AMDL322T:		printf ("29DL322T (32 M, top sector)\n");		break;	case FLASH_AMDL322B:		printf ("29DL322B (32 M, bottom sector)\n");		break;	case FLASH_AMDL323T:		printf ("29DL323T (32 M, top sector)\n");		break;	case FLASH_AMDL323B:		printf ("29DL323B (32 M, bottom sector)\n");		break;	case FLASH_AM640U:		printf ("29LV640D (64 M, uniform sector)\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;}/*----------------------------------------------------------------------- */int flash_erase (flash_info_t * info, int s_first, int s_last){	int flag, prot, sect, l_sect;	ulong start, now, last;	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;	}	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 ();	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00800080;	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00800080;	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;	udelay (1000);	/* Start erase on unprotected sectors */	for (sect = s_first; sect <= s_last; sect++) {		if (info->protect[sect] == 0) {	/* not protected */			V_ULONG (info->start[sect]) = 0x00300030;			V_ULONG (info->start[sect] + 4) = 0x00300030;			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;	while ((V_ULONG (info->start[l_sect]) & 0x00800080) != 0x00800080 ||	       (V_ULONG (info->start[l_sect] + 4) & 0x00800080) != 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 */			serial_putc ('.');			last = now;		}	}  DONE:	/* reset to read mode */	flash_reset ();	printf (" done\n");	return 0;}static int write_dword (flash_info_t *, ulong, unsigned char *);/*----------------------------------------------------------------------- * 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 dp;	static unsigned char bb[8];	int i, l, rc, cc = cnt;	dp = (addr & ~7);		/* get lower dword aligned address */	/*	 * handle unaligned start bytes	 */	if ((l = addr - dp) != 0) {		for (i = 0; i < 8; i++)			bb[i] = (i < l || (i - l) >= cc) ? V_BYTE (dp + i) : *src++;		if ((rc = write_dword (info, dp, bb)) != 0) {			return (rc);		}		dp += 8;		cc -= 8 - l;	}	/*	 * handle word aligned part	 */	while (cc >= 8) {		if ((rc = write_dword (info, dp, src)) != 0) {			return (rc);		}		dp += 8;		src += 8;		cc -= 8;	}	if (cc <= 0) {		return (0);	}	/*	 * handle unaligned tail bytes	 */	for (i = 0; i < 8; i++) {		bb[i] = (i < cc) ? *src++ : V_BYTE (dp + i);	}	return (write_dword (info, dp, bb));}/*----------------------------------------------------------------------- * Write a dword to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata){	ulong start, cl, ch;	int flag, i;	for (ch = 0, i = 0; i < 4; i++)		ch = (ch << 8) + *pdata++;	/* high word    */	for (cl = 0, i = 0; i < 4; i++)		cl = (cl << 8) + *pdata++;	/* low word */	/* Check if Flash is (sufficiently) erased */	if ((*((vu_long *) dest) & ch) != ch		|| (*((vu_long *) (dest + 4)) & cl) != cl) {		return (2);	}	/* Disable interrupts which might cause a timeout here */	flag = disable_interrupts ();	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00A000A0;	V_ULONG (dest) = ch;	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00A000A0;	V_ULONG (dest + 4) = cl;	/* re-enable interrupts if necessary */	if (flag)		enable_interrupts ();	/* data polling for D7 */	start = get_timer (0);	while (((V_ULONG (dest) & 0x00800080) != (ch & 0x00800080)) ||		   ((V_ULONG (dest + 4) & 0x00800080) != (cl & 0x00800080))) {		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {			return (1);		}	}	return (0);}