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/*
* U-boot - flash.c Flash driver for PSD4256GV
*
* Copyright (c) 2005-2007 Analog Devices Inc.
* This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
*
* (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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <malloc.h>
#include <config.h>
#include <asm/io.h>
#include "flash-defines.h"
void flash_reset(void)
{
reset_flash();
}
unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, int bank_flag)
{
int id = 0, i = 0;
static int FlagDev = 1;
id = get_codes();
if (FlagDev) {
FlagDev = 0;
}
info->flash_id = id;
switch (bank_flag) {
case 0:
for (i = PriFlashABegin; i < SecFlashABegin; i++)
info->start[i] = (baseaddr + (i * AFP_SectorSize1));
for (i = SecFlashABegin; i < NUM_SECTORS; i++)
info->start[i] =
(baseaddr + SecFlashAOff +
((i - SecFlashABegin) * AFP_SectorSize2));
info->size = 0x400000;
info->sector_count = NUM_SECTORS;
break;
case 1:
info->start[0] = baseaddr + SecFlashASec1Off;
info->start[1] = baseaddr + SecFlashASec2Off;
info->start[2] = baseaddr + SecFlashASec3Off;
info->start[3] = baseaddr + SecFlashASec4Off;
info->size = 0x10000;
info->sector_count = 4;
break;
case 2:
info->start[0] = baseaddr + SecFlashBSec1Off;
info->start[1] = baseaddr + SecFlashBSec2Off;
info->start[2] = baseaddr + SecFlashBSec3Off;
info->start[3] = baseaddr + SecFlashBSec4Off;
info->size = 0x10000;
info->sector_count = 4;
break;
}
return (info->size);
}
unsigned long flash_init(void)
{
unsigned long size_b;
int i;
size_b = 0;
for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
size_b = flash_get_size(CFG_FLASH_BASE, &flash_info[0], 0);
if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b == 0) {
printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
size_b, size_b >> 20);
}
/* flash_protect (int flag, ulong from, ulong to, flash_info_t *info) */
(void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE,
(flash_info[0].start[2] - 1), &flash_info[0]);
#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
(void)flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF,
&flash_info[0]);
#endif
return (size_b);
}
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) {
case (STM_ID_29W320EB & 0xFFFF):
case (STM_ID_29W320DB & 0xFFFF):
printf("ST Microelectronics ");
break;
default:
printf("Unknown Vendor: (0x%08X) ", info->flash_id);
break;
}
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 cnt = 0, i;
int prot, sect;
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");
cnt = s_last - s_first + 1;
#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
printf("Erasing Flash locations, Please Wait\n");
for (i = s_first; i <= s_last; i++) {
if (info->protect[i] == 0) { /* not protected */
if (erase_block_flash(i) < 0) {
printf("Error Sector erasing \n");
return FLASH_FAIL;
}
}
}
#elif (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
if (cnt == FLASH_TOT_SECT) {
printf("Erasing flash, Please Wait \n");
if (erase_flash() < 0) {
printf("Erasing flash failed \n");
return FLASH_FAIL;
}
} else {
printf("Erasing Flash locations, Please Wait\n");
for (i = s_first; i <= s_last; i++) {
if (info->protect[i] == 0) { /* not protected */
if (erase_block_flash(i) < 0) {
printf("Error Sector erasing \n");
return FLASH_FAIL;
}
}
}
}
#endif
printf("\n");
return FLASH_SUCCESS;
}
int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
int d;
if (addr % 2) {
read_flash(addr - 1 - CFG_FLASH_BASE, &d);
d = (int)((d & 0x00FF) | (*src++ << 8));
write_data(addr - 1, 2, (uchar *) & d);
write_data(addr + 1, cnt - 1, src);
} else
write_data(addr, cnt, src);
return FLASH_SUCCESS;
}
int write_data(long lStart, long lCount, uchar * pnData)
{
long i = 0;
unsigned long ulOffset = lStart - CFG_FLASH_BASE;
int d;
int nSector = 0;
int flag = 0;
if (lCount % 2) {
flag = 1;
lCount = lCount - 1;
}
for (i = 0; i < lCount - 1; i += 2, ulOffset += 2) {
get_sector_number(ulOffset, &nSector);
read_flash(ulOffset, &d);
if (d != 0xffff) {
printf
("Flash not erased at offset 0x%x Please erase to reprogram \n",
ulOffset);
return FLASH_FAIL;
}
unlock_flash(ulOffset);
d = (int)(pnData[i] | pnData[i + 1] << 8);
write_flash(ulOffset, d);
if (poll_toggle_bit(ulOffset) < 0) {
printf("Error programming the flash \n");
return FLASH_FAIL;
}
if ((i > 0) && (!(i % AFP_SectorSize2)))
printf(".");
}
if (flag) {
get_sector_number(ulOffset, &nSector);
read_flash(ulOffset, &d);
if (d != 0xffff) {
printf
("Flash not erased at offset 0x%x Please erase to reprogram \n",
ulOffset);
return FLASH_FAIL;
}
unlock_flash(ulOffset);
d = (int)(pnData[i] | (d & 0xFF00));
write_flash(ulOffset, d);
if (poll_toggle_bit(ulOffset) < 0) {
printf("Error programming the flash \n");
return FLASH_FAIL;
}
}
return FLASH_SUCCESS;
}
int write_flash(long nOffset, int nValue)
{
long addr;
addr = (CFG_FLASH_BASE + nOffset);
*(unsigned volatile short *)addr = nValue;
SSYNC();
#if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
if (icache_status())
udelay(CONFIG_CCLK_HZ / 1000000);
#endif
return FLASH_SUCCESS;
}
int read_flash(long nOffset, int *pnValue)
{
unsigned short *pFlashAddr =
(unsigned short *)(CFG_FLASH_BASE + nOffset);
*pnValue = *pFlashAddr;
return TRUE;
}
int poll_toggle_bit(long lOffset)
{
unsigned int u1, u2;
volatile unsigned long *FB =
(volatile unsigned long *)(CFG_FLASH_BASE + lOffset);
while (1) {
u1 = *(volatile unsigned short *)FB;
u2 = *(volatile unsigned short *)FB;
u1 ^= u2;
if (!(u1 & 0x0040))
break;
if (!(u2 & 0x0020))
continue;
else {
u1 = *(volatile unsigned short *)FB;
u2 = *(volatile unsigned short *)FB;
u1 ^= u2;
if (!(u1 & 0x0040))
break;
else {
reset_flash();
return FLASH_FAIL;
}
}
}
return FLASH_SUCCESS;
}
void reset_flash(void)
{
write_flash(WRITESEQ1, RESET_VAL);
/* Wait for 10 micro seconds */
udelay(10);
}
int erase_flash(void)
{
write_flash(WRITESEQ1, WRITEDATA1);
write_flash(WRITESEQ2, WRITEDATA2);
write_flash(WRITESEQ3, WRITEDATA3);
write_flash(WRITESEQ4, WRITEDATA4);
write_flash(WRITESEQ5, WRITEDATA5);
write_flash(WRITESEQ6, WRITEDATA6);
if (poll_toggle_bit(0x0000) < 0)
return FLASH_FAIL;
return FLASH_SUCCESS;
}
int erase_block_flash(int nBlock)
{
long ulSectorOff = 0x0;
if ((nBlock < 0) || (nBlock > AFP_NumSectors))
return FALSE;
/* figure out the offset of the block in flash */
if ((nBlock >= 0) && (nBlock < SecFlashABegin))
ulSectorOff = nBlock * AFP_SectorSize1;
else if ((nBlock >= SecFlashABegin) && (nBlock < NUM_SECTORS))
ulSectorOff =
SecFlashAOff + (nBlock - SecFlashABegin) * AFP_SectorSize2;
/* no such sector */
else
return FLASH_FAIL;
write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);
write_flash(ulSectorOff, BlockEraseVal);
if (poll_toggle_bit(ulSectorOff) < 0)
return FLASH_FAIL;
printf(".");
return FLASH_SUCCESS;
}
void unlock_flash(long ulOffset)
{
unsigned long ulOffsetAddr = ulOffset;
ulOffsetAddr &= 0xFFFF0000;
write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
}
int get_codes()
{
int dev_id = 0;
write_flash(WRITESEQ1, GETCODEDATA1);
write_flash(WRITESEQ2, GETCODEDATA2);
write_flash(WRITESEQ3, GETCODEDATA3);
read_flash(0x0402, &dev_id);
dev_id &= 0x0000FFFF;
reset_flash();
return dev_id;
}
void get_sector_number(long ulOffset, int *pnSector)
{
int nSector = 0;
long lMainEnd = 0x400000;
long lBootEnd = 0x10000;
/* sector numbers for the FLASH A boot sectors */
if (ulOffset < lBootEnd) {
nSector = (int)ulOffset / AFP_SectorSize1;
}
/* sector numbers for the FLASH B boot sectors */
else if ((ulOffset >= lBootEnd) && (ulOffset < lMainEnd)) {
nSector = ((ulOffset / (AFP_SectorSize2)) + 7);
}
/* if it is a valid sector, set it */
if ((nSector >= 0) && (nSector < AFP_NumSectors))
*pnSector = nSector;
}