/*
* (C) Copyright 2001
* 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 <mpc824x.h>
#include <asm/processor.h>
#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
#define FLASH_BANK_SIZE 0x800000
#define MAIN_SECT_SIZE 0x40000
#define PARAM_SECT_SIZE 0x8000
#define BOARD_CTRL_REG 0xFE800013
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
static int write_data (flash_info_t *info, ulong dest, ulong *data);
static void write_via_fpu(vu_long *addr, ulong *data);
static __inline__ unsigned long get_msr(void);
static __inline__ void set_msr(unsigned long msr);
/*---------------------------------------------------------------------*/
#undef DEBUG_FLASH
/*---------------------------------------------------------------------*/
#ifdef DEBUG_FLASH
#define DEBUGF(fmt,args...) printf(fmt ,##args)
#else
#define DEBUGF(fmt,args...)
#endif
/*---------------------------------------------------------------------*/
/*-----------------------------------------------------------------------
*/
unsigned long flash_init(void)
{
int i, j;
ulong size = 0;
volatile unsigned char *bcr = (volatile unsigned char *)(BOARD_CTRL_REG);
DEBUGF("Write protect was: 0x%02X\n", *bcr);
*bcr &= 0x1; /* FWPT must be 0 */
*bcr |= 0x6; /* FWP0 = FWP1 = 1 */
DEBUGF("Write protect is: 0x%02X\n", *bcr);
for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
vu_long *addr = (vu_long *)(CFG_FLASH_BASE + i * FLASH_BANK_SIZE);
addr[0] = 0x00900090;
DEBUGF ("Flash bank # %d:\n"
"\tManuf. ID @ 0x%08lX: 0x%08lX\n"
"\tDevice ID @ 0x%08lX: 0x%08lX\n",
i,
(ulong)(&addr[0]), addr[0],
(ulong)(&addr[2]), addr[2]);
if ((addr[0] == addr[1]) && (addr[0] == INTEL_MANUFACT) &&
(addr[2] == addr[3]) && (addr[2] == INTEL_ID_28F160F3B))
{
flash_info[i].flash_id = (FLASH_MAN_INTEL & FLASH_VENDMASK) |
(INTEL_ID_28F160F3B & FLASH_TYPEMASK);
} else {
flash_info[i].flash_id = FLASH_UNKNOWN;
addr[0] = 0xFFFFFFFF;
goto Done;
}
DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
addr[0] = 0xFFFFFFFF;
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);
for (j = 0; j < flash_info[i].sector_count; j++) {
if (j <= 7) {
flash_info[i].start[j] = CFG_FLASH_BASE +
i * FLASH_BANK_SIZE +
j * PARAM_SECT_SIZE;
} else {
flash_info[i].start[j] = CFG_FLASH_BASE +
i * FLASH_BANK_SIZE +
(j - 7)*MAIN_SECT_SIZE;
}
}
size += flash_info[i].size;
}
/* Protect monitor and environment sectors
*/
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + FLASH_BANK_SIZE
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE + monitor_flash_len - 1,
&flash_info[1]);
#else
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE + monitor_flash_len - 1,
&flash_info[0]);
#endif
#endif
#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
#if CFG_ENV_ADDR >= CFG_FLASH_BASE + FLASH_BANK_SIZE
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[1]);
#else
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[0]);
#endif
#endif
Done:
return size;
}
/*-----------------------------------------------------------------------
*/
void flash_print_info (flash_info_t * info)
{
int i;
switch ((i = info->flash_id & FLASH_VENDMASK)) {
case (FLASH_MAN_INTEL & FLASH_VENDMASK):
printf ("Intel: ");
break;
default:
printf ("Unknown Vendor 0x%04x ", i);
break;
}
switch ((i = info->flash_id & FLASH_TYPEMASK)) {
case (INTEL_ID_28F160F3B & FLASH_TYPEMASK):
printf ("28F160F3B (16Mbit)\n");
break;
default:
printf ("Unknown Chip Type 0x%04x\n", i);
goto Done;
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");
Done:
return;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect;
ulong start, now, last;
DEBUGF ("Erase flash bank %d sect %d ... %d\n",
info - &flash_info[0], s_first, s_last);
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_VENDMASK) !=
(FLASH_MAN_INTEL & FLASH_VENDMASK)) {
printf ("Can erase only Intel flash types - 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");
}
start = get_timer (0);
last = start;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
vu_long *addr = (vu_long *)(info->start[sect]);
DEBUGF ("Erase sect %d @ 0x%08lX\n",
sect, (ulong)addr);
/* Disable interrupts which might cause a timeout
* here.
*/
flag = disable_interrupts();
addr[0] = 0x00500050; /* clear status register */
addr[0] = 0x00200020; /* erase setup */
addr[0] = 0x00D000D0; /* erase confirm */
addr[1] = 0x00500050; /* clear status register */
addr[1] = 0x00200020; /* erase setup */
addr[1] = 0x00D000D0; /* erase confirm */
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
while (((addr[0] & 0x00800080) != 0x00800080) ||
((addr[1] & 0x00800080) != 0x00800080) ) {
if ((now=get_timer(start)) >
CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
addr[0] = 0x00B000B0; /* suspend erase */
addr[0] = 0x00FF00FF; /* to read mode */
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
addr[0] = 0x00FF00FF;
}
}
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* 4 - Flash not identified
*/
#define FLASH_WIDTH 8 /* flash bus width in bytes */
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong wp, cp, msr;
int l, rc, i;
ulong data[2];
ulong *datah = &data[0];
ulong *datal = &data[1];
DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n",
addr, (ulong)src, cnt);
if (info->flash_id == FLASH_UNKNOWN) {
return 4;
}
msr = get_msr();
set_msr(msr | MSR_FP);
wp = (addr & ~(FLASH_WIDTH-1)); /* get lower aligned address */
/*
* handle unaligned start bytes
*/
if ((l = addr - wp) != 0) {
*datah = *datal = 0;
for (i = 0, cp = wp; i < l; i++, cp++) {
if (i >= 4) {
*datah = (*datah << 8) |
((*datal & 0xFF000000) >> 24);
}
*datal = (*datal << 8) | (*(uchar *)cp);
}
for (; i < FLASH_WIDTH && cnt > 0; ++i) {
char tmp;
tmp = *src;
src++;
if (i >= 4) {
*datah = (*datah << 8) |
((*datal & 0xFF000000) >> 24);
}
*datal = (*datal << 8) | tmp;
--cnt; ++cp;
}
for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) {
if (i >= 4) {
*datah = (*datah << 8) |
((*datal & 0xFF000000) >> 24);
}
*datal = (*datah << 8) | (*(uchar *)cp);
}
if ((rc = write_data(info, wp, data)) != 0) {
set_msr(msr);
return (rc);
}
wp += FLASH_WIDTH;
}
/*
* handle FLASH_WIDTH aligned part
*/
while (cnt >= FLASH_WIDTH) {
*datah = *(ulong *)src;
*datal = *(ulong *)(src + 4);
if ((rc = write_data(info, wp, data)) != 0) {
set_msr(msr);
return (rc);
}
wp += FLASH_WIDTH;
cnt -= FLASH_WIDTH;
src += FLASH_WIDTH;
}
if (cnt == 0) {
set_msr(msr);
return (0);
}
/*
* handle unaligned tail bytes
*/
*datah = *datal = 0;
for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
char tmp;
tmp = *src;
src++;
if (i >= 4) {
*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
}
*datal = (*datal << 8) | tmp;
--cnt;
}
for (; i < FLASH_WIDTH; ++i, ++cp) {
if (i >= 4) {
*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
}
*datal = (*datal << 8) | (*(uchar *)cp);
}
rc = write_data(info, wp, data);
set_msr(msr);
return (rc);
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_data (flash_info_t *info, ulong dest, ulong *data)
{
vu_long *addr = (vu_long *)dest;
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if (((addr[0] & data[0]) != data[0]) ||
((addr[1] & data[1]) != data[1]) ) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0] = 0x00400040; /* write setup */
write_via_fpu(addr, data);
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
start = get_timer (0);
while (((addr[0] & 0x00800080) != 0x00800080) ||
((addr[1] & 0x00800080) != 0x00800080) ) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
addr[0] = 0x00FF00FF; /* restore read mode */
return (1);
}
}
addr[0] = 0x00FF00FF; /* restore read mode */
return (0);
}
/*-----------------------------------------------------------------------
*/
static void write_via_fpu(vu_long *addr, ulong *data)
{
__asm__ __volatile__ ("lfd 1, 0(%0)" : : "r" (data));
__asm__ __volatile__ ("stfd 1, 0(%0)" : : "r" (addr));
}
/*-----------------------------------------------------------------------
*/
static __inline__ unsigned long get_msr(void)
{
unsigned long msr;
__asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
return msr;
}
static __inline__ void set_msr(unsigned long msr)
{
__asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
}
