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uboot-1.1.4-kirkwood/board/rpxsuper/flash.c
Olaf Rempel f69754bccc u-boot 1.1.4
2024-01-07 23:57:24 +01:00

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/*
* (C) Copyright 2000
* Marius Groeger <mgroeger@sysgo.de>
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Flash Routines for AMD 29F080B devices
* Added support for 64bit and AMD 29DL323B
*
*--------------------------------------------------------------------
* 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 <mpc8xx.h>
#include <asm/io.h>
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#define RD_SWP32(x) in_le32((volatile u32*)x)
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
unsigned long size;
int i;
/* Init: no FLASHes known */
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* for now, only support the 4 MB Flash SIMM */
size = flash_get_size((vu_long *)CFG_FLASH0_BASE, &flash_info[0]);
/*
* protect monitor and environment sectors
*/
#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
#endif
#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
# ifndef CFG_ENV_SIZE
# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
# endif
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[0]);
#endif
return /*size*/ (CFG_FLASH0_SIZE * 1024 * 1024);
}
/*-----------------------------------------------------------------------
*/
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 & FLASH_VENDMASK) {
case (AMD_MANUFACT & FLASH_VENDMASK):
printf ("AMD ");
break;
case (FUJ_MANUFACT & FLASH_VENDMASK):
printf ("FUJITSU ");
break;
case (SST_MANUFACT & FLASH_VENDMASK):
printf ("SST ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case (AMD_ID_DL323B & FLASH_TYPEMASK):
printf("AM29DL323B (32 MBit)\n");
break;
default:
printf ("Unknown Chip Type\n");
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");
return;
}
/*
* The following code cannot be run from FLASH!
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
short i;
vu_long vendor[2], devid[2];
ulong base = (ulong)addr;
/* Reset and Write auto select command: read Manufacturer ID */
addr[0] = 0xf0f0f0f0;
addr[2 * 0x0555] = 0xAAAAAAAA;
addr[2 * 0x02AA] = 0x55555555;
addr[2 * 0x0555] = 0x90909090;
addr[1] = 0xf0f0f0f0;
addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
addr[2 * 0x02AA + 1] = 0x55555555;
addr[2 * 0x0555 + 1] = 0x90909090;
udelay (1000);
vendor[0] = RD_SWP32(&addr[0]);
vendor[1] = RD_SWP32(&addr[1]);
if (vendor[0] != vendor[1] || vendor[0] != AMD_MANUFACT) {
info->size = 0;
goto out;
}
devid[0] = RD_SWP32(&addr[2]);
devid[1] = RD_SWP32(&addr[3]);
if (devid[0] == AMD_ID_DL323B) {
/*
* we have 2 Banks
* Bank 1 (23 Sectors): 0-7=8kbyte, 8-22=64kbyte
* Bank 2 (48 Sectors): 23-70=64kbyte
*/
info->flash_id = (AMD_MANUFACT & FLASH_VENDMASK) |
(AMD_ID_DL323B & FLASH_TYPEMASK);
info->sector_count = 71;
info->size = 4 * (8 * 8 + 63 * 64) * 1024;
}
else {
info->size = 0;
goto out;
}
/* set up sector start address table */
for (i = 0; i < 8; i++) {
info->start[i] = base + (i * 0x8000);
}
for (i = 8; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x40000) + 8 * 0x8000 - 8 * 0x40000;
}
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* read sector protection at sector address */
addr = (volatile unsigned long *)(info->start[i]);
addr[2 * 0x0555] = 0xAAAAAAAA;
addr[2 * 0x02AA] = 0x55555555;
addr[2 * 0x0555] = 0x90909090;
addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
addr[2 * 0x02AA + 1] = 0x55555555;
addr[2 * 0x0555 + 1] = 0x90909090;
udelay (1000);
base = RD_SWP32(&addr[4]);
base |= RD_SWP32(&addr[5]);
info->protect[i] = base & 0x00010001 ? 1 : 0;
}
addr = (vu_long*)info->start[0];
out:
/* reset command */
addr[0] = 0xf0f0f0f0;
addr[1] = 0xf0f0f0f0;
return info->size;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
vu_long *addr = (vu_long*)(info->start[0]);
int flag, prot, sect, l_sect;
ulong start, now, 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;
}
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");
}
l_sect = -1;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[2 * 0x0555] = 0xAAAAAAAA;
addr[2 * 0x02AA] = 0x55555555;
addr[2 * 0x0555] = 0x80808080;
addr[2 * 0x0555] = 0xAAAAAAAA;
addr[2 * 0x02AA] = 0x55555555;
addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
addr[2 * 0x02AA + 1] = 0x55555555;
addr[2 * 0x0555 + 1] = 0x80808080;
addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
addr[2 * 0x02AA + 1] = 0x55555555;
udelay (100);
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (vu_long*)(info->start[sect]);
addr[0] = 0x30303030;
addr[1] = 0x30303030;
l_sect = sect;
}
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
/*
* We wait for the last triggered sector
*/
if (l_sect < 0)
goto DONE;
start = get_timer (0);
last = start;
addr = (vu_long*)(info->start[l_sect]);
while ( (addr[0] & 0x80808080) != 0x80808080 ||
(addr[1] & 0x80808080) != 0x80808080) {
if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
serial_putc ('.');
last = now;
}
}
DONE:
/* reset to read mode */
addr = (volatile unsigned long *)info->start[0];
addr[0] = 0xF0F0F0F0; /* reset bank */
addr[1] = 0xF0F0F0F0; /* reset bank */
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, 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);
}
for (; i<4 && cnt>0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt==0 && i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
}
/*
* handle word aligned part
*/
while (cnt >= 4) {
data = 0;
for (i=0; i<4; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
cnt -= 4;
}
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
return (write_word(info, wp, data));
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_word (flash_info_t *info, ulong dest, ulong data)
{
vu_long *addr = (vu_long*)(info->start[0]);
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *)dest) & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
if ((dest & 0x00000004) == 0) {
addr[2 * 0x0555] = 0xAAAAAAAA;
addr[2 * 0x02AA] = 0x55555555;
addr[2 * 0x0555] = 0xA0A0A0A0;
}
else {
addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
addr[2 * 0x02AA + 1] = 0x55555555;
addr[2 * 0x0555 + 1] = 0xA0A0A0A0;
}
*((vu_long *)dest) = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
/*-----------------------------------------------------------------------
*/
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