u-boot/board/pm826/flash.c

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2002-11-02 22:58:18 +00:00
/*
* (C) Copyright 2001, 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Flash Routines for Intel 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>
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
/*-----------------------------------------------------------------------
*/
ulong flash_get_size (volatile unsigned long *baseaddr,
flash_info_t * info)
{
short i;
unsigned long flashtest_h, flashtest_l;
info->sector_count = info->size = 0;
info->flash_id = FLASH_UNKNOWN;
/* Write query command sequence and test FLASH answer
*/
baseaddr[0] = 0x00980098;
baseaddr[1] = 0x00980098;
flashtest_h = baseaddr[0]; /* manufacturer ID */
flashtest_l = baseaddr[1];
if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)
return (0); /* no or unknown flash */
flashtest_h = baseaddr[2]; /* device ID */
flashtest_l = baseaddr[3];
if (flashtest_h != flashtest_l)
return (0);
switch (flashtest_h) {
case INTEL_ID_28F160C3B:
info->flash_id = FLASH_28F160C3B;
info->sector_count = 39;
info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
break;
case INTEL_ID_28F160F3B:
info->flash_id = FLASH_28F160F3B;
info->sector_count = 39;
info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
break;
case INTEL_ID_28F640C3B:
info->flash_id = FLASH_28F640C3B;
info->sector_count = 135;
info->size = 0x02000000; /* 16 * 2 MB = 32 MB */
break;
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default:
return (0); /* no or unknown flash */
}
info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */
if (info->flash_id & FLASH_BTYPE) {
volatile unsigned long *tmp = baseaddr;
/* set up sector start adress table (bottom sector type)
* AND unlock the sectors (if our chip is 160C3 or 640C3)
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*/
for (i = 0; i < info->sector_count; i++) {
if (((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) ||
((info->flash_id & FLASH_TYPEMASK) == FLASH_28F640C3B)) {
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tmp[0] = 0x00600060;
tmp[1] = 0x00600060;
tmp[0] = 0x00D000D0;
tmp[1] = 0x00D000D0;
}
info->start[i] = (uint) tmp;
tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */
}
}
memset (info->protect, 0, info->sector_count);
baseaddr[0] = 0x00FF00FF;
baseaddr[1] = 0x00FF00FF;
return (info->size);
}
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
unsigned long size_b0 = 0;
int i;
/* Init: no FLASHes known
*/
for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* Static FLASH Bank configuration here (only one bank) */
size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]);
if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
size_b0, size_b0 >> 20);
}
/* protect monitor and environment sectors
*/
#ifndef CONFIG_BOOT_ROM
/* If U-Boot is booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE
* but we shouldn't protect it.
*/
# 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]
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);
# endif
#endif /* CONFIG_BOOT_ROM */
#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
# ifndef CONFIG_ENV_SIZE
# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
flash_protect (FLAG_PROTECT_SET,
CONFIG_ENV_ADDR,
CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
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#endif
return (size_b0);
}
/*-----------------------------------------------------------------------
*/
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) & 0xff) {
case 0x89:
printf ("INTEL ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F160C3B:
printf ("28F160C3B (16 M, bottom sector)\n");
break;
case FLASH_28F160F3B:
printf ("28F160F3B (16 M, bottom sector)\n");
break;
case FLASH_28F640C3B:
printf ("28F640C3B (64 M, bottom sector)\n");
break;
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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");
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
int flag, prot, 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");
}
/* Start erase on unprotected sectors
*/
for (sect = s_first; sect <= s_last; sect++) {
volatile ulong *addr =
(volatile unsigned long *) info->start[sect];
start = get_timer (0);
last = start;
if (info->protect[sect] == 0) {
/* Disable interrupts which might cause a timeout here
*/
flag = disable_interrupts ();
/* Erase the block
*/
addr[0] = 0x00200020;
addr[1] = 0x00200020;
addr[0] = 0x00D000D0;
addr[1] = 0x00D000D0;
/* re-enable interrupts if necessary
*/
if (flag)
enable_interrupts ();
/* wait at least 80us - let's wait 1 ms
*/
udelay (1000);
last = start;
while ((addr[0] & 0x00800080) != 0x00800080 ||
(addr[1] & 0x00800080) != 0x00800080) {
if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout (erase suspended!)\n");
/* Suspend erase
*/
addr[0] = 0x00B000B0;
addr[1] = 0x00B000B0;
goto DONE;
}
/* show that we're waiting
*/
if ((now - last) > 1000) { /* every second */
serial_putc ('.');
last = now;
}
}
if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
printf ("*** ERROR: erase failed!\n");
goto DONE;
}
}
/* Clear status register and reset to read mode
*/
addr[0] = 0x00500050;
addr[1] = 0x00500050;
addr[0] = 0x00FF00FF;
addr[1] = 0x00FF00FF;
}
printf (" done\n");
DONE:
return 0;
}
static int write_word (flash_info_t *, volatile unsigned long *, ulong);
/*-----------------------------------------------------------------------
* 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 v;
int i, l, cc = cnt, res = 0;
for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
l = (addr & 3);
addr &= ~3;
for (i = 0; i < 4; i++) {
v = (v << 8) + (i < l || i - l >= cc ?
*((unsigned char *) addr + i) : *src++);
}
if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
break;
}
return (res);
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_word (flash_info_t * info, volatile unsigned long *addr,
ulong data)
{
int flag, res = 0;
ulong start;
/* Check if Flash is (sufficiently) erased
*/
if ((*addr & data) != data)
return (2);
/* Disable interrupts which might cause a timeout here
*/
flag = disable_interrupts ();
*addr = 0x00400040;
*addr = data;
/* re-enable interrupts if necessary
*/
if (flag)
enable_interrupts ();
start = get_timer (0);
while ((*addr & 0x00800080) != 0x00800080) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
/* Suspend program
*/
*addr = 0x00B000B0;
res = 1;
goto OUT;
}
}
if (*addr & 0x00220022) {
printf ("*** ERROR: program failed!\n");
res = 1;
}
OUT:
/* Clear status register and reset to read mode
*/
*addr = 0x00500050;
*addr = 0x00FF00FF;
return (res);
}