/* * (C) Copyright 2000-2003 * 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 *//******************************************************************************** Notes: AM29LV320DB - 90EI ( 32 Mbit device )** Sectors - Eight 8 Kb sector** 	   - Sixty three 64 Kb sector** Bottom boot sector******************************************************************************/#include <common.h>#include <mpc8xx.h>/********************************************************************************	Defines******************************************************************************/#ifdef CONFIG_ADDERII#define ADDR0	0x0555#define ADDR1	0x02AA#define FLASH_WORD_SIZE unsigned short#endif#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/********************************************************************************	Global Parameters******************************************************************************/flash_info_t flash_info[CFG_MAX_FLASH_BANKS];/********************************************************************************	Function Prototypes******************************************************************************/static ulong flash_get_size( vu_long *addr, flash_info_t *info );static int write_word( flash_info_t *info, ulong dest, ulong data );static void flash_get_offsets( ulong base, flash_info_t *info );int wait_for_DQ7( flash_info_t *info, int sect );/******************************************************************************** Function :	flash_init** Param    :   void** Notes    :   Initializes the Flash Chip******************************************************************************/ulong flash_init (void){	ulong size_b0 = -1;	int i;	volatile immap_t *immap = (immap_t *) CFG_IMMR;	volatile memctl8xx_t *memctl = &immap->im_memctl;	/* Set Flash to unknown */	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {		flash_info[i].flash_id = FLASH_UNKNOWN;	}	/* Get the Flash Bank Size */	size_b0 = flash_get_size ((vu_long *) (CFG_FLASH_BASE),				  &flash_info[0]);	if (flash_info[0].flash_id == FLASH_UNKNOWN) {		printf ("## UNKNOWN Flash on Bank 0 - Size = 0x%08lx = %ldMB\n",			size_b0, size_b0 >> 20);	}	/* Remap Flash according to size detected  */	memctl->memc_or0 = 0xFF800774;	memctl->memc_br0 = CFG_BR0_PRELIM;	/* Setup Flash Sector Offsets */	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);	/* Monitor Protection ON - default */#if ( CFG_MONITOR_BASE >= CFG_FLASH_BASE  )	flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE,		       (CFG_MONITOR_BASE + monitor_flash_len - 1),		       &flash_info[0]);#endif	/* Protect Environment Variables */#ifdef CFG_ENV_IS_IN_FLASH	flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR,		       (CFG_ENV_ADDR + CFG_ENV_SIZE - 1), &flash_info[0]);#endif	return size_b0;}/******************************************************************************** Function : flash_get_offsets** Param    : ulong base, flash_into_t *info** Notes    :******************************************************************************/static void flash_get_offsets (ulong base, flash_info_t * info){	return;}/******************************************************************************** Function : flash_print_info** Param    : flash_info_t** Notes    :******************************************************************************/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;	case FLASH_MAN_BM:		printf ("BRIGHT MICRO ");		break;	default:		printf ("Unknown Vendor ");		break;	}	switch (info->flash_id & FLASH_TYPEMASK) {	case FLASH_AM320B:		printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");		break;	case FLASH_AM320T:		printf ("AM29LV320T (32 Mbit, top boot 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;}/******************************************************************************** Function : flash_get_size** Param    : vu_long *addr, flash_info_t *info** Notes    :******************************************************************************/static ulong flash_get_size (vu_long * addr, flash_info_t * info){	short i;	FLASH_WORD_SIZE manu_id, dev_id;	ulong base = (ulong) addr;	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;	/* Write Auto Select Command and read Manufacturer's ID and Dev ID */	addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAAAAAAAA;	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55555555;	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90909090;	manu_id = addr2[0];	switch (manu_id) {	case (FLASH_WORD_SIZE) AMD_MANUFACT:		info->flash_id = FLASH_MAN_AMD;		break;	default:		info->flash_id = FLASH_UNKNOWN;		info->sector_count = 0;		info->size = 0;		break;	}	/* Read Device Id */	dev_id = addr2[1];	switch (dev_id) {	case (FLASH_WORD_SIZE) AMD_ID_LV320B:		info->flash_id += FLASH_AM320B;		info->sector_count = 71;	/* 8 - boot sec + 63 normal */		info->size = 0x400000;	/* 4MByte */		break;	default:		info->flash_id = FLASH_UNKNOWN;		break;	}	/* Set up sector start Addresses */	if (info->flash_id & FLASH_BTYPE) {		/* set sector offsets for bottom boot block		 ** Eight 8 Kb Boot sectors		 ** Sixty Three 64Kb sectors		 */		for (i = 0; i < 8; i++) {			info->start[i] = base + (i * 0x00002000);		}		for (i = 8; i < info->sector_count; i++) {			info->start[i] = base + (i * 0x00010000) - 0x00070000;		}	}	/* Reset To read mode */	if (info->flash_id != FLASH_UNKNOWN) {		addr = (ulong *) info->start[0];		*addr = 0xF0F0F0F0;	}	return (info->size);}/********************************************************************************* Function : flash_erase** Param    : flash_info_t *info, int s_first, int s_last** Notes    :******************************************************************************/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;	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]);			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 */			} 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 */			}			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);	/* reset to read mode */	addr = (FLASH_WORD_SIZE *) info->start[0];	addr[0] = (FLASH_WORD_SIZE) 0x00F000F0;	/* reset bank */	printf (" done\n");	return 0;}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)) > CFG_FLASH_ERASE_TOUT) {			printf ("Timeout\n");			return -1;		}		/* show that we're waiting */		if ((now - last) > 1000) {			putc ('.');			last = now;		}	}	return 0;}/******************************************************************************** Function : write_buff** Param    : flash_info_t *info, uchar *src, ulong addr, ulong cnt** Notes    :******************************************************************************/int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt){	ulong cp, wp, data;	int i, l, rc;	/* get lower word aligned address */	wp = (addr & ~3);	/*	 * 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;		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);	}	return (write_word (info, wp, data));}/******************************************************************************** Function : write_word** Param    : flash_info_t *info, ulong dest, ulong data** Notes    :******************************************************************************/static int write_word (flash_info_t * info, ulong dest, ulong data){	volatile FLASH_WORD_SIZE *addr2 =		(FLASH_WORD_SIZE *) (info->start[0]);	volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;	volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;	ulong start;	int i;	/* Check if Flash is (sufficiently) erased */	if ((*((volatile FLASH_WORD_SIZE *) dest) &	     (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {		return (2);	}	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {		int flag;		/* Disable interrupts which might cause a timeout here */		flag = disable_interrupts ();		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) > CFG_FLASH_WRITE_TOUT) {				return (1);			}		}	}	return (0);}