/* * Copyright (C) 2003 ETC s.r.o. * * This code was inspired by Marius Groeger and Kyle Harris code * available in other board ports for U-Boot * * 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 * * Written by Peter Figuli <peposh@etc.sk>, 2003. * */#include <common.h>#include "intel.h"/* * This code should handle CFI FLASH memory device. This code is very * minimalistic approach without many essential error handling code as well. * Because U-Boot actually is missing smart handling of FLASH device, * we just set flash_id to anything else to FLASH_UNKNOW, so common code * can call us without any restrictions. * TODO: Add CFI Query, to be able to determine FLASH device. * TODO: Add error handling code * NOTE: This code was tested with BUS_WIDTH 4 and ITERLEAVE 2 only, but *       hopefully may work with other configurations. */#if ( SCB9328_FLASH_BUS_WIDTH == 1 )#  define FLASH_BUS vu_char#  if ( SCB9328_FLASH_INTERLEAVE == 1 )#    define FLASH_CMD( x ) x#  else#    error "With 8bit bus only one chip is allowed"#  endif#elif ( SCB9328_FLASH_BUS_WIDTH == 2 )#  define FLASH_BUS vu_short#  if ( SCB9328_FLASH_INTERLEAVE == 1 )#    define FLASH_CMD( x ) x#  elif ( SCB9328_FLASH_INTERLEAVE == 2 )#    define FLASH_CMD( x ) (( x << 8 )| x )#  else#    error "With 16bit bus only 1 or 2 chip(s) are allowed"#  endif#elif ( SCB9328_FLASH_BUS_WIDTH == 4 )#  define FLASH_BUS vu_long#  if ( SCB9328_FLASH_INTERLEAVE == 1 )#    define FLASH_CMD( x ) x#  elif ( SCB9328_FLASH_INTERLEAVE == 2 )#    define FLASH_CMD( x ) (( x << 16 )| x )#  elif ( SCB9328_FLASH_INTERLEAVE == 4 )#    define FLASH_CMD( x ) (( x << 24 )|( x << 16 ) ( x << 8 )| x )#  else#    error "With 32bit bus only 1,2 or 4 chip(s) are allowed"#  endif#else#  error "Flash bus width might be 1,2,4 for 8,16,32 bit configuration"#endifflash_info_t flash_info[CFG_MAX_FLASH_BANKS];static FLASH_BUS flash_status_reg (void){	FLASH_BUS *addr = (FLASH_BUS *) 0;	*addr = FLASH_CMD (CFI_INTEL_CMD_READ_STATUS_REGISTER);	return *addr;}static int flash_ready (ulong timeout){	int ok = 1;	reset_timer_masked ();	while ((flash_status_reg () & FLASH_CMD (CFI_INTEL_SR_READY)) !=		   FLASH_CMD (CFI_INTEL_SR_READY)) {		if (get_timer_masked () > timeout && timeout != 0) {			ok = 0;			break;		}	}	return ok;}#if ( CFG_MAX_FLASH_BANKS != 1 )#  error "SCB9328 platform has only one flash bank!"#endifulong flash_init (void){	int i;	unsigned long address = SCB9328_FLASH_BASE;	flash_info[0].size = SCB9328_FLASH_BANK_SIZE;	flash_info[0].sector_count = CFG_MAX_FLASH_SECT;	flash_info[0].flash_id = INTEL_MANUFACT;	memset (flash_info[0].protect, 0, CFG_MAX_FLASH_SECT);	for (i = 0; i < CFG_MAX_FLASH_SECT; i++) {		flash_info[0].start[i] = address;#ifdef SCB9328_FLASH_UNLOCK		/* Some devices are hw locked after start. */		*((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_LOCK_SETUP);		*((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_UNLOCK_BLOCK);		flash_ready (0);		*((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);#endif		address += SCB9328_FLASH_SECT_SIZE;	}	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 SCB9328_FLASH_BANK_SIZE;}void flash_print_info (flash_info_t * info){	int i;	printf (" Intel vendor\n");	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)) {			printf ("\n");		}		printf (" %08lX%s", info->start[i],				info->protect[i] ? " (RO)" : "     ");	}	printf ("\n");}int flash_erase (flash_info_t * info, int s_first, int s_last){	int flag, non_protected = 0, sector;	int rc = ERR_OK;	FLASH_BUS *address;	for (sector = s_first; sector <= s_last; sector++) {		if (!info->protect[sector]) {			non_protected++;		}	}	if (!non_protected) {		return ERR_PROTECTED;	}	/*	 * Disable interrupts which might cause a timeout	 * here. Remember that our exception vectors are	 * at address 0 in the flash, and we don't want a	 * (ticker) exception to happen while the flash	 * chip is in programming mode.	 */	flag = disable_interrupts ();	/* Start erase on unprotected sectors */	for (sector = s_first; sector <= s_last && !ctrlc (); sector++) {		if (info->protect[sector]) {			printf ("Protected sector %2d skipping...\n", sector);			continue;		} else {			printf ("Erasing sector %2d ... ", sector);		}		address = (FLASH_BUS *) (info->start[sector]);		*address = FLASH_CMD (CFI_INTEL_CMD_BLOCK_ERASE);		*address = FLASH_CMD (CFI_INTEL_CMD_CONFIRM);		if (flash_ready (CFG_FLASH_ERASE_TOUT)) {			*address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);			printf ("ok.\n");		} else {			*address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);			rc = ERR_TIMOUT;			printf ("timeout! Aborting...\n");			break;		}		*address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);	}	if (ctrlc ())		printf ("User Interrupt!\n");	/* allow flash to settle - wait 10 ms */	udelay_masked (10000);	if (flag) {		enable_interrupts ();	}	return rc;}static int write_data (flash_info_t * info, ulong dest, FLASH_BUS data){	FLASH_BUS *address = (FLASH_BUS *) dest;	int rc = ERR_OK;	int flag;	/* Check if Flash is (sufficiently) erased */	if ((*address & data) != data) {		return ERR_NOT_ERASED;	}	/*	 * Disable interrupts which might cause a timeout	 * here. Remember that our exception vectors are	 * at address 0 in the flash, and we don't want a	 * (ticker) exception to happen while the flash	 * chip is in programming mode.	 */	flag = disable_interrupts ();	*address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);	*address = FLASH_CMD (CFI_INTEL_CMD_PROGRAM1);	*address = data;	if (!flash_ready (CFG_FLASH_WRITE_TOUT)) {		*address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);		rc = ERR_TIMOUT;		printf ("timeout! Aborting...\n");	}	*address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);	if (flag) {		enable_interrupts ();	}	return rc;}int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt){	ulong read_addr, write_addr;	FLASH_BUS data;	int i, result = ERR_OK;	read_addr = addr & ~(sizeof (FLASH_BUS) - 1);	write_addr = read_addr;	if (read_addr != addr) {		data = 0;		for (i = 0; i < sizeof (FLASH_BUS); i++) {			if (read_addr < addr || cnt == 0) {				data |= *((uchar *) read_addr) << i * 8;			} else {				data |= (*src++) << i * 8;				cnt--;			}			read_addr++;		}		if ((result = write_data (info, write_addr, data)) != ERR_OK) {			return result;		}		write_addr += sizeof (FLASH_BUS);	}	for (; cnt >= sizeof (FLASH_BUS); cnt -= sizeof (FLASH_BUS)) {		if ((result = write_data (info, write_addr,								  *((FLASH_BUS *) src))) != ERR_OK) {			return result;		}		write_addr += sizeof (FLASH_BUS);		src += sizeof (FLASH_BUS);	}	if (cnt > 0) {		read_addr = write_addr;		data = 0;		for (i = 0; i < sizeof (FLASH_BUS); i++) {			if (cnt > 0) {				data |= (*src++) << i * 8;				cnt--;			} else {				data |= *((uchar *) read_addr) << i * 8;			}			read_addr++;		}		if ((result = write_data (info, write_addr, data)) != 0) {			return result;		}	}	return ERR_OK;}