/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <gj@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
*/
/* #define DEBUG */
#include <common.h>
#include <environment.h>
#define FLASH_BANK_SIZE 0x1000000 /* 16MB (2 x 8 MB) */
#define MAIN_SECT_SIZE 0x40000 /* 256KB (2 x 128kB) */
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#define CMD_READ_ARRAY 0x00FF00FF
#define CMD_IDENTIFY 0x00900090
#define CMD_ERASE_SETUP 0x00200020
#define CMD_ERASE_CONFIRM 0x00D000D0
#define CMD_PROGRAM 0x00400040
#define CMD_RESUME 0x00D000D0
#define CMD_SUSPEND 0x00B000B0
#define CMD_STATUS_READ 0x00700070
#define CMD_STATUS_RESET 0x00500050
#define BIT_BUSY 0x00800080
#define BIT_ERASE_SUSPEND 0x00400040
#define BIT_ERASE_ERROR 0x00200020
#define BIT_PROGRAM_ERROR 0x00100010
#define BIT_VPP_RANGE_ERROR 0x00080008
#define BIT_PROGRAM_SUSPEND 0x00040004
#define BIT_PROTECT_ERROR 0x00020002
#define BIT_UNDEFINED 0x00010001
#define BIT_SEQUENCE_ERROR 0x00300030
#define BIT_TIMEOUT 0x80000000
/*-----------------------------------------------------------------------
*/
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_28F640J3A & 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;
/* uniform sector size */
flashbase += MAIN_SECT_SIZE;
}
size += flash_info[i].size;
}
/*
* Protect monitor and environment sectors
*/
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]);
#ifdef CFG_ENV_ADDR_REDUND
flash_protect ( FLAG_PROTECT_SET,
CFG_ENV_ADDR_REDUND,
CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
&flash_info[0]);
#endif
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_28F640J3A & FLASH_TYPEMASK):
printf ("2x 28F640J3A (64Mbit)\n");
break;
default:
printf ("Unknown Chip Type\n");
return;
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 (ulong code)
{
/* Check bit patterns */
/* SR.7=0 is busy, SR.7=1 is ready */
/* all other flags indicate error on 1 */
/* SR.0 is undefined */
/* Timeout is our faked flag */
/* sequence is described in Intel 290644-005 document */
/* check Timeout */
if (code & BIT_TIMEOUT) {
puts ("Timeout\n");
return ERR_TIMOUT;
}
/* check Busy, SR.7 */
if (~code & BIT_BUSY) {
puts ("Busy\n");
return ERR_PROG_ERROR;
}
/* check Vpp low, SR.3 */
if (code & BIT_VPP_RANGE_ERROR) {
puts ("Vpp range error\n");
return ERR_PROG_ERROR;
}
/* check Device Protect Error, SR.1 */
if (code & BIT_PROTECT_ERROR) {
puts ("Device protect error\n");
return ERR_PROG_ERROR;
}
/* check Command Seq Error, SR.4 & SR.5 */
if (code & BIT_SEQUENCE_ERROR) {
puts ("Command seqence error\n");
return ERR_PROG_ERROR;
}
/* check Block Erase Error, SR.5 */
if (code & BIT_ERASE_ERROR) {
puts ("Block erase error\n");
return ERR_PROG_ERROR;
}
/* check Program Error, SR.4 */
if (code & BIT_PROGRAM_ERROR) {
puts ("Program error\n");
return ERR_PROG_ERROR;
}
/* check Block Erase Suspended, SR.6 */
if (code & BIT_ERASE_SUSPEND) {
puts ("Block erase suspended\n");
return ERR_PROG_ERROR;
}
/* check Program Suspended, SR.2 */
if (code & BIT_PROGRAM_SUSPEND) {
puts ("Program suspended\n");
return ERR_PROG_ERROR;
}
/* OK, no error */
return ERR_OK;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
ulong result, result1;
int iflag, prot, sect;
int rc = ERR_OK;
#ifdef USE_920T_MMU
int cflag;
#endif
debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last);
/* first look for protection bits */
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;
}
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");
}
/*
* 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.
*/
#ifdef USE_920T_MMU
cflag = dcache_status ();
dcache_disable ();
#endif
iflag = disable_interrupts ();
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
debug ("Erasing sector %2d @ %08lX... ",
sect, info->start[sect]);
/* arm simple, non interrupt dependent timer */
reset_timer();
if (info->protect[sect] == 0) { /* not protected */
vu_long *addr = (vu_long *) (info->start[sect]);
ulong bsR7, bsR7_2, bsR5, bsR5_2;
ulong tstart;
/* *addr = CMD_STATUS_RESET; */
*addr = CMD_ERASE_SETUP;
*addr = CMD_ERASE_CONFIRM;
/* wait until flash is ready */
tstart = get_timer(0);
do {
ulong now;
/* check timeout */
/*if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { */
if ((now = get_timer(tstart)) > CFG_FLASH_ERASE_TOUT) {
printf("tstart = 0x%08lx, now = 0x%08lx\n", tstart, now);
*addr = CMD_STATUS_RESET;
result = BIT_TIMEOUT;
break;
}
*addr = CMD_STATUS_READ;
result = *addr;
bsR7 = result & (1 << 7);
bsR7_2 = result & (1 << 23);
} while (!bsR7 | !bsR7_2);
*addr = CMD_STATUS_READ;
result1 = *addr;
bsR5 = result1 & (1 << 5);
bsR5_2 = result1 & (1 << 21);
#ifdef SAMSUNG_FLASH_DEBUG
printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
if (bsR5 != 0 && bsR5_2 != 0)
printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
#endif
*addr = CMD_READ_ARRAY;
*addr = CMD_RESUME;
if ((rc = flash_error (result)) != ERR_OK)
goto outahere;
#if 0
printf ("ok.\n");
} else { /* it was protected */
printf ("protected!\n");
#endif
}
}
outahere:
/* allow flash to settle - wait 10 ms */
udelay_masked (10000);
if (iflag)
enable_interrupts ();
#ifdef USE_920T_MMU
if (cflag)
dcache_enable ();
#endif
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash
*/
volatile static int write_word (flash_info_t * info, ulong dest,
ulong data)
{
vu_long *addr = (vu_long *) dest;
ulong result;
int rc = ERR_OK;
int iflag;
#ifdef USE_920T_MMU
int cflag;
#endif
/*
* Check if Flash is (sufficiently) erased
*/
result = *addr;
if ((result & 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.
*/
#ifdef USE_920T_MMU
cflag = dcache_status ();
dcache_disable ();
#endif
iflag = disable_interrupts ();
/* *addr = CMD_STATUS_RESET; */
*addr = CMD_PROGRAM;
*addr = data;
/* arm simple, non interrupt dependent timer */
reset_timer_masked ();
/* wait until flash is ready */
do {
/* check timeout */
if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
*addr = CMD_SUSPEND;
result = BIT_TIMEOUT;
break;
}
*addr = CMD_STATUS_READ;
result = *addr;
} while (~result & BIT_BUSY);
/* *addr = CMD_READ_ARRAY; */
*addr = CMD_STATUS_READ;
result = *addr;
rc = flash_error (result);
if (iflag)
enable_interrupts ();
#ifdef USE_920T_MMU
if (cflag)
dcache_enable ();
#endif
*addr = CMD_READ_ARRAY;
*addr = CMD_RESUME;
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash.
*/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int l;
int i, rc;
wp = (addr & ~3); /* get lower word aligned address */
/*
* handle unaligned start bytes
*/
if ((l = addr - wp) != 0) {
data = 0;
for (i = 0, cp = wp; i < l; ++i, ++cp) {
data = (data >> 8) | (*(uchar *) cp << 24);
}
for (; i < 4 && cnt > 0; ++i) {
data = (data >> 8) | (*src++ << 24);
--cnt;
++cp;
}
for (; cnt == 0 && i < 4; ++i, ++cp) {
data = (data >> 8) | (*(uchar *) cp << 24);
}
if ((rc = write_word (info, wp, data)) != 0) {
return (rc);
}
wp += 4;
}
/*
* handle word aligned part
*/
while (cnt >= 4) {
data = *((vu_long *) src);
if ((rc = write_word (info, wp, data)) != 0) {
return (rc);
}
src += 4;
wp += 4;
cnt -= 4;
}
if (cnt == 0) {
return ERR_OK;
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
data = (data >> 8) | (*src++ << 24);
--cnt;
}
for (; i < 4; ++i, ++cp) {
data = (data >> 8) | (*(uchar *) cp << 24);
}
return write_word (info, wp, data);
}
