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u-boot/board/mpc8540eval/flash.c
Lunsheng Wang b0e3294923 * Patch by Ron Alder, 11 July 2005 
Add Xianghua Xiao and Lunsheng Wang's support for the
    GDA MPC8540 EVAL board.
2005-07-29 10:20:29 -05:00

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/*
* (C) Copyright 2003 Motorola Inc.
* Xianghua Xiao,(X.Xiao@motorola.com)
*
* (C) Copyright 2000, 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
* Add support the Sharp chips on the mpc8260ads.
* I started with board/ip860/flash.c and made changes I found in
* the MTD project by David Schleef.
*
* 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>
#if !defined(CFG_NO_FLASH)
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
#if defined(CFG_ENV_IS_IN_FLASH)
# ifndef CFG_ENV_ADDR
# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
# endif
# ifndef CFG_ENV_SIZE
# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
# endif
# ifndef CFG_ENV_SECT_SIZE
# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
# endif
#endif
/*
* The variable should be in the flash info structure. Since it
* is only used in this board specific file it is declared here.
* In the future I think an endian flag should be part of the
* flash_info_t structure. (Ron Alder)
*/
static ulong big_endian = 0;
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_block (flash_info_t *info, uchar * src, ulong dest, ulong cnt);
static int write_short (flash_info_t *info, ulong dest, ushort data);
static int write_word (flash_info_t *info, ulong dest, ulong data);
static int clear_block_lock_bit(flash_info_t *info, vu_long * addr);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
unsigned long size;
int i;
/* Init: enable write,
* or we cannot even write flash commands
*/
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
/* set the default sector offset */
}
/* Static FLASH Bank configuration here - FIXME XXX */
size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
size, size<<20);
}
/* Re-do sizing to get full correct info */
size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
flash_info[0].size = size;
#if !defined(CONFIG_RAM_AS_FLASH)
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
#endif
#ifdef CFG_ENV_IS_IN_FLASH
/* ENV protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
&flash_info[0]);
#endif
#endif
return (size);
}
/*-----------------------------------------------------------------------
*/
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 FLASH_MAN_INTEL: printf ("Intel "); break;
case FLASH_MAN_SHARP: printf ("Sharp "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n");
break;
case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
break;
case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
break;
case FLASH_LH28F016SCT: printf ("28F016SC (16 Mbit, 32 x 64K)\n");
break;
case FLASH_28F640J3A: printf ("28F640J3A (64 Mbit, 64 x 128K)\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");
}
/* only deal with 16 bit and 32 bit port width, 16bit chip */
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
short i;
ulong value,va,vb,vc,vd;
ulong base = (ulong)addr;
ulong sector_offset;
#ifdef DEBUG
printf("Check flash at 0x%08x\n",(uint)addr);
#endif
/* Write "Intelligent Identifier" command: read Manufacturer ID */
*addr = 0x90909090;
udelay(20);
asm("sync");
#ifndef CFG_FLASH_CFI
printf("Not define CFG_FLASH_CFI\n");
return (0);
#else
value = addr[0];
va=(value & 0xFF000000)>>24;
vb=(value & 0x00FF0000)>>16;
vc=(value & 0x0000FF00)>>8;
vd=(value & 0x000000FF);
if ((va==0) && (vb==0)) {
printf("cannot identify Flash\n");
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
else if ((va==0) && (vb!=0)) {
big_endian = 1;
info->chipwidth = FLASH_CFI_BY16;
if(vb == vd) info->portwidth = FLASH_CFI_32BIT;
else info->portwidth = FLASH_CFI_16BIT;
}
else if ((va!=0) && (vb==0)) {
big_endian = 0;
info->chipwidth = FLASH_CFI_BY16;
if(va == vc) info->portwidth = FLASH_CFI_32BIT;
else info->portwidth = FLASH_CFI_16BIT;
}
else if ((va!=0) && (vb!=0)) {
big_endian = 1; /* no meaning for 8bit chip */
info->chipwidth = FLASH_CFI_BY8;
if(va == vb) info->portwidth = FLASH_CFI_16BIT;
else info->portwidth = FLASH_CFI_8BIT;
}
#ifdef DEBUG
switch (info->portwidth) {
case FLASH_CFI_8BIT:
printf("port width is 8 bit.\n");
break;
case FLASH_CFI_16BIT:
printf("port width is 16 bit, ");
break;
case FLASH_CFI_32BIT:
printf("port width is 32 bit, ");
break;
}
switch (info->chipwidth) {
case FLASH_CFI_BY16:
printf("chip width is 16 bit, ");
switch (big_endian) {
case 0:
printf("Little Endian.\n");
break;
case 1:
printf("Big Endian.\n");
break;
}
break;
}
#endif
#endif /*#ifdef CFG_FLASH_CFI*/
if (big_endian==0) value = (addr[0] & 0xFF000000) >>8;
else value = (addr[0] & 0x00FF0000);
#ifdef DEBUG
printf("manufacturer=0x%x\n",(uint)(value>>16));
#endif
switch (value) {
case MT_MANUFACT & 0xFFFF0000: /* SHARP, MT or => Intel */
case INTEL_ALT_MANU & 0xFFFF0000:
info->flash_id = FLASH_MAN_INTEL;
break;
default:
printf("unknown manufacturer: %x\n", (unsigned int)value);
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
if (info->portwidth==FLASH_CFI_16BIT) {
switch (big_endian) {
case 0:
value = (addr[0] & 0x0000FF00)>>8;
break;
case 1:
value = (addr[0] & 0x000000FF);
break;
}
}
else if (info->portwidth == FLASH_CFI_32BIT) {
switch (big_endian) {
case 0:
value = (addr[1] & 0x0000FF00)>>8;
break;
case 1:
value = (addr[1] & 0x000000FF);
break;
}
}
#ifdef DEBUG
printf("deviceID=0x%x\n",(uint)value);
#endif
switch (value) {
case (INTEL_ID_28F016S & 0x0000FFFF):
info->flash_id += FLASH_28F016SV;
info->sector_count = 32;
sector_offset = 0x10000;
break; /* => 2 MB */
case (INTEL_ID_28F160S3 & 0x0000FFFF):
info->flash_id += FLASH_28F160S3;
info->sector_count = 32;
sector_offset = 0x10000;
break; /* => 2 MB */
case (INTEL_ID_28F320S3 & 0x0000FFFF):
info->flash_id += FLASH_28F320S3;
info->sector_count = 64;
sector_offset = 0x10000;
break; /* => 4 MB */
case (INTEL_ID_28F640J3A & 0x0000FFFF):
info->flash_id += FLASH_28F640J3A;
info->sector_count = 64;
sector_offset = 0x20000;
break; /* => 8 MB */
case SHARP_ID_28F016SCL & 0x0000FFFF:
case SHARP_ID_28F016SCZ & 0x0000FFFF:
info->flash_id = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
info->sector_count = 32;
sector_offset = 0x10000;
break; /* => 2 MB */
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
sector_offset = sector_offset * (info->portwidth / info->chipwidth);
info->size = info->sector_count * sector_offset;
/* set up sector start address table */
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
base += sector_offset;
/* don't know how to check sector protection */
info->protect[i] = 0;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
addr = (vu_long *)info->start[0];
*addr = 0xFFFFFF; /* reset bank to read array mode */
asm("sync");
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect;
ulong start, now, last, ready, erase_err_status;
if (big_endian == 1) {
ready = 0x0080;
erase_err_status = 0x00a0;
}
else {
ready = 0x8000;
erase_err_status = 0xa000;
}
if ((info->portwidth / info->chipwidth)==2) {
ready += (ready <<16);
erase_err_status += (erase_err_status <<16);
}
#ifdef DEBUG
printf ("\nReady flag is 0x%lx\nErase error flag is 0x%lx", ready, erase_err_status);
#endif
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;
}
if ( ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL)
&& ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
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");
}
#ifdef DEBUG
printf("\nFlash Erase:\n");
#endif
/* Make Sure Block Lock Bit is not set. */
if(clear_block_lock_bit(info, (vu_long *)(info->start[s_first]))){
return 1;
}
/* Start erase on unprotected sectors */
#if defined(DEBUG)
printf("Begin to erase now,s_first=0x%x s_last=0x%x...\n",s_first,s_last);
#endif
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
vu_short *addr16 = (vu_short *)(info->start[sect]);
vu_long *addr = (vu_long *)(info->start[sect]);
printf(".");
switch (info->portwidth) {
case FLASH_CFI_16BIT:
asm("sync");
last = start = get_timer (0);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Reset Array */
*addr16 = 0xffff;
asm("sync");
/* Clear Status Register */
*addr16 = 0x5050;
asm("sync");
/* Single Block Erase Command */
*addr16 = 0x2020;
asm("sync");
/* Confirm */
*addr16 = 0xD0D0;
asm("sync");
if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
/* Resume Command, as per errata update */
*addr16 = 0xD0D0;
asm("sync");
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
*addr16 = 0x7070;
udelay (1000);
while ((*addr16 & ready) != ready) {
if((*addr16 & erase_err_status)== erase_err_status){
printf("Error in Block Erase - Lock Bit may be set!\n");
printf("Status Register = 0x%X\n", (uint)*addr16);
*addr16 = 0xFFFF; /* reset bank */
asm("sync");
return 1;
}
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
*addr16 = 0xFFFF; /* reset bank */
asm("sync");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
/* reset to read mode */
*addr16 = 0xFFFF;
asm("sync");
break;
case FLASH_CFI_32BIT:
asm("sync");
last = start = get_timer (0);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Reset Array */
*addr = 0xffffffff;
asm("sync");
/* Clear Status Register */
*addr = 0x50505050;
asm("sync");
/* Single Block Erase Command */
*addr = 0x20202020;
asm("sync");
/* Confirm */
*addr = 0xD0D0D0D0;
asm("sync");
if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
/* Resume Command, as per errata update */
*addr = 0xD0D0D0D0;
asm("sync");
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
*addr = 0x70707070;
udelay (1000);
while ((*addr & ready) != ready) {
if((*addr & erase_err_status)==erase_err_status){
printf("Error in Block Erase - Lock Bit may be set!\n");
printf("Status Register = 0x%X\n", (uint)*addr);
*addr = 0xFFFFFFFF; /* reset bank */
asm("sync");
return 1;
}
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
*addr = 0xFFFFFFFF; /* reset bank */
asm("sync");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
/* reset to read mode */
*addr = 0xFFFFFFFF;
asm("sync");
break;
} /* end switch */
} /* end if */
} /* end for */
printf ("flash erase done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
#define FLASH_BLOCK_SIZE 32
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data, count, temp;
/* ulong temp[FLASH_BLOCK_SIZE/4];*/
int i, l, rc;
count = cnt;
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;
}
cp = wp;
/* handle unaligned block bytes , flash block size = 16bytes */
wp = (cp+FLASH_BLOCK_SIZE-1) & ~(FLASH_BLOCK_SIZE-1);
if ((wp-cp)>=cnt) {
if ((rc = write_block(info,src,cp,wp-cp)) !=0)
return (rc);
src += wp-cp;
cnt -= wp-cp;
}
/* handle aligned block bytes */
temp = 0;
printf("\n");
while ( cnt >= FLASH_BLOCK_SIZE) {
if ((rc = write_block(info,src,cp,FLASH_BLOCK_SIZE)) !=0) {
return (rc);
}
src += FLASH_BLOCK_SIZE;
cp += FLASH_BLOCK_SIZE;
cnt -= FLASH_BLOCK_SIZE;
if (((count-cnt)>>10)>temp) {
temp=(count-cnt)>>10;
printf("\r%d KB",temp);
}
}
printf("\n");
wp = cp;
/*
* 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));
}
#undef FLASH_BLOCK_SIZE
/*-----------------------------------------------------------------------
* Write block to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* -1 Error
*/
static int write_block(flash_info_t *info, uchar * src, ulong dest, ulong cnt)
{
vu_short *baddr, *addr = (vu_short *)dest;
ushort data;
ulong start, now, xsr,csr, ready;
int flag;
if (cnt==0) return 0;
else if(cnt != (cnt& ~1)) return -1;
/* Check if Flash is (sufficiently) erased */
data = * src;
data = (data<<8) | *(src+1);
if ((*addr & data) != data) {
return (2);
}
if (big_endian == 1) {
ready = 0x0080;
}
else {
ready = 0x8000;
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
do {
/* Write Command */
*addr = 0xe8e8;
asm("sync");
xsr = *addr;
asm("sync");
} while (!(xsr & ready)); /*wait until read */
/*write count=BLOCK SIZE -1 */
data=(cnt>>1)-1;
data=(data<<8)|data;
*addr = data; /* word mode, cnt/2 */
asm("sync");
baddr = addr;
while(cnt) {
data = * src++;
data = (data<<8) | *src++;
asm("sync");
*baddr = data;
asm("sync");
++baddr;
cnt = cnt -2;
}
*addr = 0xd0d0; /* confirm write */
start = get_timer(0);
asm("sync");
if (flag)
enable_interrupts();
/* data polling for D7 */
flag = 0;
while (((csr = *addr) & ready) != ready) {
if ((now=get_timer(start)) > CFG_FLASH_WRITE_TOUT) {
flag = 1;
break;
}
}
if (csr & 0x4040) {
printf ("CSR indicates write error (%04x) at %08lx\n", csr, (ulong)addr);
flag = 1;
}
/* Clear Status Registers Command */
*addr = 0x5050;
asm("sync");
/* Reset to read array mode */
*addr = 0xFFFF;
asm("sync");
return (flag);
}
/*-----------------------------------------------------------------------
* Write a short word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_short (flash_info_t *info, ulong dest, ushort data)
{
vu_short *addr = (vu_short *)dest;
ulong start, now, csr, ready;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Write Command */
*addr = 0x1010;
start = get_timer (0);
asm("sync");
/* Write Data */
*addr = data;
asm("sync");
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
if (big_endian == 1) {
ready = 0x0080;
}
else {
ready = 0x8000;
}
/* data polling for D7 */
flag = 0;
while (((csr = *addr) & ready) != ready) {
if ((now=get_timer(start)) > CFG_FLASH_WRITE_TOUT) {
flag = 1;
break;
}
}
if (csr & 0x4040) {
printf ("CSR indicates write error (%04x) at %08lx\n", csr, (ulong)addr);
flag = 1;
}
/* Clear Status Registers Command */
*addr = 0x5050;
asm("sync");
/* Reset to read array mode */
*addr = 0xFFFF;
asm("sync");
return (flag);
}
/*-----------------------------------------------------------------------
* 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 *)dest;
ulong start, csr, ready;
int flag=0;
switch (info->portwidth) {
case FLASH_CFI_32BIT:
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
if (big_endian == 1) {
ready = 0x0080;
}
else {
ready = 0x8000;
}
if ((info->portwidth / info->chipwidth)==2) {
ready += (ready <<16);
}
else {
ready = ready << 16;
}
/* Write Command */
*addr = 0x10101010;
asm("sync");
/* Write Data */
*addr = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
flag = 0;
while (((csr = *addr) & ready) != ready) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
flag = 1;
break;
}
}
if (csr & 0x40404040) {
printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
flag = 1;
}
/* Clear Status Registers Command */
*addr = 0x50505050;
asm("sync");
/* Reset to read array mode */
*addr = 0xFFFFFFFF;
asm("sync");
break;
case FLASH_CFI_16BIT:
flag = write_short (info, dest, (unsigned short) (data>>16));
if (flag == 0)
flag = write_short (info, dest+2, (unsigned short) (data));
break;
}
return (flag);
}
/*-----------------------------------------------------------------------
* Clear Block Lock Bit, returns:
* 0 - OK
* 1 - Timeout
*/
static int clear_block_lock_bit(flash_info_t * info, vu_long * addr)
{
ulong start, now, ready;
/* Reset Array */
*addr = 0xffffffff;
asm("sync");
/* Clear Status Register */
*addr = 0x50505050;
asm("sync");
*addr = 0x60606060;
asm("sync");
*addr = 0xd0d0d0d0;
asm("sync");
if (big_endian == 1) {
ready = 0x0080;
}
else {
ready = 0x8000;
}
if ((info->portwidth / info->chipwidth)==2) {
ready += (ready <<16);
}
else {
ready = ready << 16;
}
#ifdef DEBUG
printf ("%s: Ready flag is 0x%8lx\n", __FUNCTION__, ready);
#endif
*addr = 0x70707070; /* read status */
start = get_timer (0);
while((*addr & ready) != ready){
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout on clearing Block Lock Bit\n");
*addr = 0xFFFFFFFF; /* reset bank */
asm("sync");
return 1;
}
}
return 0;
}
#endif /* !CFG_NO_FLASH */
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