/* * flash.c: Support code for the flash chips on the Xilinx ML2 board * * Copyright 2002 Mind NV * * http://www.mind.be/ * * Author : Peter De Schrijver (p2@mind.be) * * This software may be used and distributed according to the terms of * the GNU General Public License (GPL) version 2, incorporated herein by * reference. Drivers based on or derived from this code fall under the GPL * and must retain the authorship, copyright and this license notice. This * file is not a complete program and may only be used when the entire program * is licensed under the GPL. * */#include <common.h>#include <asm/u-boot.h>#include <configs/ML2.h>#define FLASH_BANK_SIZE (64*1024*1024)flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];#define SECT_SIZE		(512*1024)#define CMD_READ_ARRAY	0x00FF00FF00FF00FULL#define CMD_IDENTIFY        0x0090009000900090ULL#define CMD_ERASE_SETUP     0x0020002000200020ULL#define CMD_ERASE_CONFIRM   0x00D000D000D000D0ULL#define CMD_PROGRAM     0x0040004000400040ULL#define CMD_RESUME      0x00D000D000D000D0ULL#define CMD_SUSPEND     0x00B000B000B000B0ULL#define CMD_STATUS_READ     0x0070007000700070ULL#define CMD_STATUS_RESET    0x0050005000500050ULL#define BIT_BUSY        0x0080008000800080ULL#define BIT_ERASE_SUSPEND   0x004000400400040ULL#define BIT_ERASE_ERROR     0x0020002000200020ULL#define BIT_PROGRAM_ERROR   0x0010001000100010ULL#define BIT_VPP_RANGE_ERROR 0x0008000800080008ULL#define BIT_PROGRAM_SUSPEND 0x0004000400040004ULL#define BIT_PROTECT_ERROR   0x0002000200020002ULL#define BIT_UNDEFINED       0x0001000100010001ULL#define BIT_SEQUENCE_ERROR  0x0030003000300030ULL#define BIT_TIMEOUT     0x80000000inline void eieio(void) {	__asm__ __volatile__ ("eieio" : : : "memory");}ulong flash_init(void) {	int i, j;	ulong size = 0;	for(i=0;i<CFG_MAX_FLASH_BANKS;i++) {		ulong flashbase = 0;		flash_info[i].flash_id = (INTEL_MANUFACT & FLASH_VENDMASK) |								 (INTEL_ID_28F128J3A & FLASH_TYPEMASK);		flash_info[i].size = FLASH_BANK_SIZE;		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);		if (i==0)			flashbase = CFG_FLASH_BASE;		else			panic("configured too many flash banks!\n");		for (j = 0; j < flash_info[i].sector_count; j++)				flash_info[i].start[j]=flashbase + j * SECT_SIZE;		size += flash_info[i].size;	}	return size;}void flash_print_info  (flash_info_t *info) {	int i;	switch (info->flash_id & FLASH_VENDMASK) {		case (INTEL_MANUFACT & FLASH_VENDMASK):			printf("Intel: ");			break;		default:			printf("Unknown Vendor ");			break;	}	switch (info->flash_id & FLASH_TYPEMASK) {		case (INTEL_ID_28F128J3A & FLASH_TYPEMASK):			printf("4x 28F128J3A (128Mbit)\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");}int flash_error (unsigned long long code) {	if (code & BIT_TIMEOUT) {		printf ("Timeout\n");		return ERR_TIMOUT;	}	if (~code & BIT_BUSY) {		printf ("Busy\n");		return ERR_PROG_ERROR;	}	if (code & BIT_VPP_RANGE_ERROR) {		printf ("Vpp range error\n");		return ERR_PROG_ERROR;	}	if (code & BIT_PROTECT_ERROR) {		printf ("Device protect error\n");		return ERR_PROG_ERROR;	}	if (code & BIT_SEQUENCE_ERROR) {		printf ("Command seqence error\n");		return ERR_PROG_ERROR;	}	if (code & BIT_ERASE_ERROR) {		printf ("Block erase error\n");		return ERR_PROG_ERROR;	}	if (code & BIT_PROGRAM_ERROR) {		printf ("Program error\n");		return ERR_PROG_ERROR;	}	if (code & BIT_ERASE_SUSPEND) {		printf ("Block erase suspended\n");		return ERR_PROG_ERROR;	}	if (code & BIT_PROGRAM_SUSPEND) {		printf ("Program suspended\n");		return ERR_PROG_ERROR;	}	return ERR_OK;}int flash_erase (flash_info_t *info, int s_first, int s_last) {	int rc = ERR_OK;	int sect;	unsigned long long result;	if (info->flash_id == FLASH_UNKNOWN)		return ERR_UNKNOWN_FLASH_TYPE;	if ((s_first < 0) || (s_first > s_last))		return ERR_INVAL;	if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))		return ERR_UNKNOWN_FLASH_VENDOR;	for (sect=s_first; sect<=s_last; ++sect)		if (info->protect[sect])			return ERR_PROTECTED;	for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {		volatile unsigned long long *addr=									(unsigned long long *)(info->start[sect]);		printf("Erasing sector %2d ... ", sect);		*addr=CMD_STATUS_RESET;		eieio();		*addr=CMD_ERASE_SETUP;		eieio();		*addr=CMD_ERASE_CONFIRM;		eieio();		do {			result = *addr;		} while(~result & BIT_BUSY);		*addr=CMD_READ_ARRAY;		if ((rc = flash_error(result)) == ERR_OK)			printf("ok.\n");		else			break;	}	if (ctrlc())		printf("User Interrupt!\n");	return rc;}volatile static int write_word (flash_info_t *info, ulong dest, unsigned long long data) {	volatile unsigned long long *addr=(unsigned long long *)dest;	unsigned long long result;	int rc = ERR_OK;	result=*addr;	if ((result & data) != data)		return ERR_NOT_ERASED;	*addr=CMD_STATUS_RESET;	eieio();	*addr=CMD_PROGRAM;	eieio();	*addr=data;	eieio();	do {		result=*addr;	} while(~result & BIT_BUSY);	*addr=CMD_READ_ARRAY;	rc = flash_error(result);	return rc;}int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) {	ulong cp, wp;	unsigned long long data;	int l;	int i,rc;	wp=(addr & ~7);	if((l=addr-wp) != 0) {		data=0;		for(i=0,cp=wp;i<l;++i,++cp)			data = (data >> 8) | (*(uchar *)cp << 24);		for (; i<8 && cnt>0; ++i) {			data = (data >> 8) | (*src++ << 24);			--cnt;			++cp;		}		for (; i<8; ++i, ++cp)			data = (data >> 8) | (*(uchar *)cp << 24);		if ((rc = write_word(info, wp, data)) != 0)			return rc;		wp+=8;	}	while(cnt>=8) {		data=*((unsigned long long *)src);		if ((rc = write_word(info, wp, data)) != 0)			return rc;		src+=8;		wp+=8;		cnt-=8;	}	if(cnt == 0)		return ERR_OK;	data = 0;	for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) {		data = (data >> 8) | (*src++ << 24);		--cnt;	}	for (; i<8; ++i, ++cp) {		data = (data >> 8) | (*(uchar *)cp << 24);	}	return write_word(info, wp, data);}