/* * (C) Copyright 2000-2004 * 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 <nios.h>flash_info_t flash_info[CFG_MAX_FLASH_BANKS];/*--------------------------------------------------------------------*/void flash_print_info (flash_info_t * info){	int i, k;	unsigned long size;	int erased;	volatile unsigned char *flash;	printf ("  Size: %ld KB in %d Sectors\n",		info->size >> 10, info->sector_count);	printf ("  Sector Start Addresses:");	for (i = 0; i < info->sector_count; ++i) {		/* Check if whole sector is erased */		if (i != (info->sector_count - 1))			size = info->start[i + 1] - info->start[i];		else			size = info->start[0] + info->size - info->start[i];		erased = 1;		flash = (volatile unsigned char *) info->start[i];		for (k = 0; k < size; k++) {			if (*flash++ != 0xff) {				erased = 0;				break;			}		}		/* Print the info */		if ((i % 5) == 0)			printf ("\n   ");		printf (" %08lX%s%s", info->start[i], erased ? " E" : "  ",			info->protect[i] ? "RO " : "   ");	}	printf ("\n");}/*-------------------------------------------------------------------*/int flash_erase (flash_info_t * info, int s_first, int s_last){	volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);	volatile CFG_FLASH_WORD_SIZE *addr2;	int prot, sect;	unsigned oldpri;	ulong start;	/* Some sanity checking */	if ((s_first < 0) || (s_first > s_last)) {		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");	}#ifdef DEBUG	for (sect = s_first; sect <= s_last; sect++) {		printf("- Erase: Sect: %i @ 0x%08x\n", sect,  info->start[sect]);	}#endif	/* NOTE: disabling interrupts on Nios can be very bad since it	 * also disables the LO_LIMIT exception. It's better here to	 * set the interrupt priority to 3 & restore it when we're done.	 */	oldpri = ipri (3);	/* It's ok to erase multiple sectors provided we don't delay more	 * than 50 usec between cmds ... at which point the erase time-out	 * occurs. So don't go and put printf() calls in the loop ... it	 * won't be very helpful ;-)	 */	for (sect = s_first; sect <= s_last; sect++) {		if (info->protect[sect] == 0) {	/* not protected */			addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);			*addr = 0xaa;			*addr = 0x55;			*addr = 0x80;			*addr = 0xaa;			*addr = 0x55;			*addr2 = 0x30;			/* Now just wait for 0xff & provide some user			 * feedback while we wait. Here we have to grant			 * timer interrupts. Otherwise get_timer() can't			 * work right. */			ipri(oldpri);			start = get_timer (0);			while (*addr2 != 0xff) {				udelay (1000 * 1000);				putc ('.');				if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {					printf ("timeout\n");					return 1;				}			}			oldpri = ipri (3); /* disallow non important irqs again */		}	}	printf ("\n");	/* Restore interrupt priority */	ipri (oldpri);	return 0;}/*----------------------------------------------------------------------- * 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){	vu_char *cmd = (vu_char *) info->start[0];	vu_char *dst = (vu_char *) addr;	unsigned char b;	unsigned oldpri;	ulong start;	while (cnt) {		/* Check for sufficient erase */		b = *src;		if ((*dst & b) != b) {			printf ("%02x : %02x\n", *dst, b);			return (2);		}		/* Disable interrupts other than window underflow		 * (interrupt priority 2)		 */		oldpri = ipri (3);		*cmd = 0xaa;		*cmd = 0x55;		*cmd = 0xa0;		*dst = b;		/* Verify write */		start = get_timer (0);		while (*dst != b) {			if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {				ipri (oldpri);				return 1;			}		}		dst++;		src++;		cnt--;		ipri (oldpri);	}	return (0);}