/*
* (C) Copyright 2001, 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2002
* Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
*
* Flash Routines for AMD device AM29DL323DB on the EP8260 board.
*
* This file is based on board/tqm8260/flash.c.
*--------------------------------------------------------------------
* 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>
#define V_ULONG(a) (*(volatile unsigned long *)( a ))
#define V_BYTE(a) (*(volatile unsigned char *)( a ))
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
/*-----------------------------------------------------------------------
*/
void flash_reset(void)
{
if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
}
}
/*-----------------------------------------------------------------------
*/
ulong flash_get_size( ulong baseaddr, flash_info_t *info )
{
short i;
unsigned long flashtest_h, flashtest_l;
/* Write auto select command sequence and test FLASH answer */
V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;
flashtest_h = V_ULONG(baseaddr); /* manufacturer ID */
flashtest_l = V_ULONG(baseaddr + 4);
if ((int)flashtest_h == AMD_MANUFACT) {
info->flash_id = FLASH_MAN_AMD;
} else {
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
flashtest_h = V_ULONG(baseaddr + 8); /* device ID */
flashtest_l = V_ULONG(baseaddr + 12);
if (flashtest_h != flashtest_l) {
info->flash_id = FLASH_UNKNOWN;
return(0);
}
if (flashtest_h == AMD_ID_DL323B) {
info->flash_id += FLASH_AMDL323B;
info->sector_count = 71;
info->size = 0x01000000; /* 4 * 4 MB = 16 MB */
} else {
info->flash_id = FLASH_UNKNOWN;
return(0); /* no or unknown flash */
}
/* set up sector start adress table (bottom sector type) */
for (i = 0; i < 8; i++) {
info->start[i] = baseaddr + (i * 0x00008000);
}
for (i = 8; i < info->sector_count; i++) {
info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
}
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) ||
(V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
info->protect[i] = 1; /* D0 = 1 if protected */
} else {
info->protect[i] = 0;
}
}
flash_reset();
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(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
*/
#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+CFG_MONITOR_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_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 FLASH_MAN_AMD: printf ("AMD "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AMDL323B: printf ("29DL323B (32 M, bottom sector)\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;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
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();
V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
udelay (1000);
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
V_ULONG( info->start[sect] ) = 0x00300030;
V_ULONG( info->start[sect] + 4 ) = 0x00300030;
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;
while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 ||
(V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
{
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 */
flash_reset ();
printf (" done\n");
return 0;
}
static int write_dword (flash_info_t *, ulong, unsigned char *);
/*-----------------------------------------------------------------------
* 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 dp;
static unsigned char bb[8];
int i, l, rc, cc = cnt;
dp = (addr & ~7); /* get lower dword aligned address */
/*
* handle unaligned start bytes
*/
if ((l = addr - dp) != 0) {
for (i = 0; i < 8; i++)
bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
if ((rc = write_dword(info, dp, bb)) != 0)
{
return (rc);
}
dp += 8;
cc -= 8 - l;
}
/*
* handle word aligned part
*/
while (cc >= 8) {
if ((rc = write_dword(info, dp, src)) != 0) {
return (rc);
}
dp += 8;
src += 8;
cc -= 8;
}
if (cc <= 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
for (i = 0; i < 8; i++) {
bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
}
return (write_dword(info, dp, bb));
}
/*-----------------------------------------------------------------------
* Write a dword to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata)
{
ulong start;
ulong cl = 0, ch =0;
int flag, i;
for (ch=0, i=0; i < 4; i++)
ch = (ch << 8) + *pdata++; /* high word */
for (cl=0, i=0; i < 4; i++)
cl = (cl << 8) + *pdata++; /* low word */
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *)dest) & ch) != ch
||(*((vu_long *)(dest + 4)) & cl) != cl)
{
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
V_ULONG( dest ) = ch;
V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
V_ULONG( dest + 4 ) = cl;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) ||
((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
