u-boot/board/mbx8xx/flash.c
Jean-Christophe PLAGNIOL-VILLARD 6d0f6bcf33 rename CFG_ macros to CONFIG_SYS
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-10-18 21:54:03 +02:00

409 lines
9.4 KiB
C

/*
* (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 AM290[48]0B devices
*
*--------------------------------------------------------------------
* 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 "vpd.h"
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* 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, totsize;
int i;
ulong addr;
/* Init: no FLASHes known */
for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
totsize = 0;
addr = 0xfc000000;
for(i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
size = flash_get_size((vu_long *)addr, &flash_info[i]);
if (flash_info[i].flash_id == FLASH_UNKNOWN)
break;
totsize += size;
addr += size;
}
addr = 0xfe000000;
for(i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
size = flash_get_size((vu_long *)addr, &flash_info[i]);
if (flash_info[i].flash_id == FLASH_UNKNOWN)
break;
totsize += size;
addr += size;
}
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CONFIG_SYS_MONITOR_BASE,
CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
#endif
return (totsize);
}
/*-----------------------------------------------------------------------
*/
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 >> 16) {
case 0x1:
printf ("AMD ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case AMD_ID_F040B:
printf ("AM29F040B (4 Mbit)\n");
break;
case AMD_ID_F080B:
printf ("AM29F080B (8 Mbit)\n");
break;
case AMD_ID_F016D:
printf ("AM29F016D (16 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;
ulong vendor, devid;
ulong base = (ulong)addr;
/* Write auto select command: read Manufacturer ID */
addr[0x0555] = 0xAAAAAAAA;
addr[0x02AA] = 0x55555555;
addr[0x0555] = 0x90909090;
vendor = addr[0];
devid = addr[1] & 0xff;
/* only support AMD */
if (vendor != 0x01010101) {
return 0;
}
vendor &= 0xf;
devid &= 0xff;
if (devid == AMD_ID_F040B) {
info->flash_id = vendor << 16 | devid;
info->sector_count = 8;
info->size = info->sector_count * 0x10000;
}
else if (devid == AMD_ID_F080B) {
info->flash_id = vendor << 16 | devid;
info->sector_count = 16;
info->size = 4 * info->sector_count * 0x10000;
}
else if (devid == AMD_ID_F016D) {
info->flash_id = vendor << 16 | devid;
info->sector_count = 32;
info->size = 4 * info->sector_count * 0x10000;
}
else {
printf ("## Unknown Flash Type: %08lx\n", devid);
return 0;
}
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* sector base address */
info->start[i] = base + i * (info->size / info->sector_count);
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
/* D0 = 1 if protected */
addr = (volatile unsigned long *)(info->start[i]);
info->protect[i] = addr[2] & 1;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
addr = (vu_long *)info->start[0];
addr[0] = 0xF0; /* reset bank */
}
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[0x0555] = 0XAAAAAAAA;
addr[0x02AA] = 0x55555555;
addr[0x0555] = 0x80808080;
addr[0x0555] = 0XAAAAAAAA;
addr[0x02AA] = 0x55555555;
/* 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;
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) {
if ((now = get_timer(start)) > CONFIG_SYS_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 */
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();
addr[0x0555] = 0xAAAAAAAA;
addr[0x02AA] = 0x55555555;
addr[0x0555] = 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) > CONFIG_SYS_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
/*-----------------------------------------------------------------------
*/