/*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Alex Zuepke <azu@sysgo.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 <asm/io.h>
ulong myflush(void);
#define SC520_MAX_FLASH_BANKS 3
#define SC520_FLASH_BANK0_BASE 0x38000000 /* BOOTCS */
#define SC520_FLASH_BANK1_BASE 0x30000000 /* ROMCS0 */
#define SC520_FLASH_BANK2_BASE 0x28000000 /* ROMCS1 */
#define SC520_FLASH_BANKSIZE 0x8000000
#define AMD29LV016_SIZE 0x200000
#define AMD29LV016_SECTORS 32
flash_info_t flash_info[SC520_MAX_FLASH_BANKS];
#define CMD_READ_ARRAY 0x00F000F0
#define CMD_UNLOCK1 0x00AA00AA
#define CMD_UNLOCK2 0x00550055
#define CMD_ERASE_SETUP 0x00800080
#define CMD_ERASE_CONFIRM 0x00300030
#define CMD_PROGRAM 0x00A000A0
#define CMD_UNLOCK_BYPASS 0x00200020
#define BIT_ERASE_DONE 0x00800080
#define BIT_RDY_MASK 0x00800080
#define BIT_PROGRAM_ERROR 0x00200020
#define BIT_TIMEOUT 0x80000000 /* our flag */
#define READY 1
#define ERR 2
#define TMO 4
/*-----------------------------------------------------------------------
*/
ulong flash_init(void)
{
int i, j;
ulong size = 0;
for (i = 0; i < SC520_MAX_FLASH_BANKS; i++) {
ulong flashbase = 0;
int sectsize = 0;
if (i==0 || i==2) {
/* FixMe: this assumes that bank 0 and 2
* are mapped to the two 8Mb banks */
flash_info[i].flash_id =
(AMD_MANUFACT & FLASH_VENDMASK) |
(AMD_ID_LV016B & FLASH_TYPEMASK);
flash_info[i].size = AMD29LV016_SIZE*4;
flash_info[i].sector_count = AMD29LV016_SECTORS;
sectsize = (AMD29LV016_SIZE*4)/AMD29LV016_SECTORS;
} else {
/* FixMe: this assumes that bank1 is unmapped
* (or mapped to the same flash bank as BOOTCS) */
flash_info[i].flash_id = 0;
flash_info[i].size = 0;
flash_info[i].sector_count = 0;
sectsize=0;
}
memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
switch (i) {
case 0:
flashbase = SC520_FLASH_BANK0_BASE;
break;
case 1:
flashbase = SC520_FLASH_BANK1_BASE;
break;
case 2:
flashbase = SC520_FLASH_BANK0_BASE;
break;
default:
panic("configured to many flash banks!\n");
}
for (j = 0; j < flash_info[i].sector_count; j++) {
flash_info[i].start[j] = sectsize;
flash_info[i].start[j] = flashbase + j * sectsize;
}
size += flash_info[i].size;
}
/*
* Protect monitor and environment sectors
*/
flash_protect(FLAG_PROTECT_SET,
i386boot_start-SC520_FLASH_BANK0_BASE,
i386boot_end-SC520_FLASH_BANK0_BASE,
&flash_info[0]);
#ifdef CFG_ENV_ADDR
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[0]);
#endif
return size;
}
/*-----------------------------------------------------------------------
*/
void flash_print_info(flash_info_t *info)
{
int i;
switch (info->flash_id & FLASH_VENDMASK) {
case (AMD_MANUFACT & FLASH_VENDMASK):
printf("AMD: ");
break;
default:
printf("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case (AMD_ID_LV016B & FLASH_TYPEMASK):
printf("4x Amd29LV016B (16Mbit)\n");
break;
default:
printf("Unknown Chip Type\n");
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:
}
/*-----------------------------------------------------------------------
*/
int flash_erase(flash_info_t *info, int s_first, int s_last)
{
ulong result;
int iflag, prot, sect;
int rc = ERR_OK;
int chip1, chip2;
/* 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) !=
(AMD_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) {
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.
*/
iflag = disable_interrupts();
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
printf("Erasing sector %2d ... ", sect);
/* arm simple, non interrupt dependent timer */
reset_timer();
if (info->protect[sect] == 0) {
/* not protected */
ulong addr = info->start[sect];
writel(CMD_UNLOCK1, addr + 1);
writel(CMD_UNLOCK2, addr + 2);
writel(CMD_ERASE_SETUP, addr + 1);
writel(CMD_UNLOCK1, addr + 1);
writel(CMD_UNLOCK2, addr + 2);
writel(CMD_ERASE_CONFIRM, addr);
/* wait until flash is ready */
chip1 = chip2 = 0;
do {
result = readl(addr);
/* check timeout */
if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
writel(CMD_READ_ARRAY, addr + 1);
chip1 = TMO;
break;
}
if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) {
chip1 = READY;
}
if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) {
chip1 = ERR;
}
if (!chip2 && (result >> 16) & BIT_ERASE_DONE) {
chip2 = READY;
}
if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) {
chip2 = ERR;
}
} while (!chip1 || !chip2);
writel(CMD_READ_ARRAY, addr + 1);
if (chip1 == ERR || chip2 == ERR) {
rc = ERR_PROG_ERROR;
goto outahere;
}
if (chip1 == TMO) {
rc = ERR_TIMOUT;
goto outahere;
}
printf("ok.\n");
} else { /* it was protected */
printf("protected!\n");
}
}
if (ctrlc()) {
printf("User Interrupt!\n");
}
outahere:
/* allow flash to settle - wait 10 ms */
udelay(10000);
if (iflag) {
enable_interrupts();
}
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash
*/
volatile static int write_word(flash_info_t *info, ulong dest, ulong data)
{
ulong addr = dest;
ulong result;
int rc = ERR_OK;
int iflag;
int chip1, chip2;
/*
* Check if Flash is (sufficiently) erased
*/
result = readl(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.
*/
iflag = disable_interrupts();
writel(CMD_UNLOCK1, addr + 1);
writel(CMD_UNLOCK2, addr + 2);
writel(CMD_UNLOCK_BYPASS, addr + 1);
writel(addr, CMD_PROGRAM);
writel(addr, data);
/* arm simple, non interrupt dependent timer */
reset_timer();
/* wait until flash is ready */
chip1 = chip2 = 0;
do {
result = readl(addr);
/* check timeout */
if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
chip1 = ERR | TMO;
break;
}
if (!chip1 && ((result & 0x80) == (data & 0x80))) {
chip1 = READY;
}
if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
result = readl(addr);
if ((result & 0x80) == (data & 0x80)) {
chip1 = READY;
} else {
chip1 = ERR;
}
}
if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) {
chip2 = READY;
}
if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
result = readl(addr);
if ((result & (0x80 << 16)) == (data & (0x80 << 16))) {
chip2 = READY;
} else {
chip2 = ERR;
}
}
} while (!chip1 || !chip2);
writel(CMD_READ_ARRAY, addr);
if (chip1 == ERR || chip2 == ERR || readl(addr) != data) {
rc = ERR_PROG_ERROR;
}
if (iflag) {
enable_interrupts();
}
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);
}
