e0ead84895
The RBC823 has only one NOR flash bank. Remove all code trying to deal with a second bank. This also fixes a number of GCC 4.6 build warnings: flash.c: In function 'flash_init': flash.c:62:12: warning: array subscript is above array bounds [-Warray-bounds] flash.c:63:12: warning: array subscript is above array bounds [-Warray-bounds] flash.c:66:12: warning: array subscript is above array bounds [-Warray-bounds] Signed-off-by: Wolfgang Denk <wd@denx.de>
462 lines
9.5 KiB
C
462 lines
9.5 KiB
C
/*
|
|
* (C) Copyright 2000
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* 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[CONFIG_SYS_MAX_FLASH_BANKS];
|
|
|
|
/*
|
|
* 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);
|
|
static void flash_get_offsets(ulong base, flash_info_t *info);
|
|
|
|
unsigned long flash_init(void)
|
|
{
|
|
unsigned long size_b0;
|
|
int i;
|
|
|
|
/* Init: no FLASHes known */
|
|
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
|
|
flash_info[i].flash_id = FLASH_UNKNOWN;
|
|
|
|
/* Detect size */
|
|
size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE,
|
|
&flash_info[0]);
|
|
|
|
/* Setup offsets */
|
|
flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
|
|
|
|
#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
|
|
|
|
flash_info[0].size = size_b0;
|
|
|
|
return size_b0;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Fix this to support variable sector sizes
|
|
*/
|
|
static void flash_get_offsets(ulong base, flash_info_t *info)
|
|
{
|
|
int i;
|
|
|
|
/* set up sector start address table */
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
|
|
/* set sector offsets for bottom boot block type */
|
|
for (i = 0; i < info->sector_count; i++)
|
|
info->start[i] = base + (i * 0x00010000);
|
|
}
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
void flash_print_info(flash_info_t *info)
|
|
{
|
|
int i;
|
|
|
|
if (info->flash_id == FLASH_UNKNOWN) {
|
|
puts("missing or unknown FLASH type\n");
|
|
return;
|
|
}
|
|
|
|
switch (info->flash_id & FLASH_VENDMASK) {
|
|
case FLASH_MAN_AMD:
|
|
printf("AMD ");
|
|
break;
|
|
case FLASH_MAN_FUJ:
|
|
printf("FUJITSU ");
|
|
break;
|
|
case FLASH_MAN_BM:
|
|
printf("BRIGHT MICRO ");
|
|
break;
|
|
default:
|
|
printf("Unknown Vendor ");
|
|
break;
|
|
}
|
|
|
|
switch (info->flash_id & FLASH_TYPEMASK) {
|
|
case FLASH_AM040:
|
|
printf("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
|
|
break;
|
|
case FLASH_AM400B:
|
|
printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
|
|
break;
|
|
case FLASH_AM400T:
|
|
printf("AM29LV400T (4 Mbit, top boot sector)\n");
|
|
break;
|
|
case FLASH_AM800B:
|
|
printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
|
|
break;
|
|
case FLASH_AM800T:
|
|
printf("AM29LV800T (8 Mbit, top boot sector)\n");
|
|
break;
|
|
case FLASH_AM160B:
|
|
printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
|
|
break;
|
|
case FLASH_AM160T:
|
|
printf("AM29LV160T (16 Mbit, top boot sector)\n");
|
|
break;
|
|
case FLASH_AM320B:
|
|
printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
|
|
break;
|
|
case FLASH_AM320T:
|
|
printf("AM29LV320T (32 Mbit, top boot sector)\n");
|
|
break;
|
|
default:
|
|
printf("Unknown Chip Type\n");
|
|
break;
|
|
}
|
|
|
|
if (info->size >> 20) {
|
|
printf(" Size: %ld MB in %d Sectors\n",
|
|
info->size >> 20,
|
|
info->sector_count);
|
|
} else {
|
|
printf(" Size: %ld KB in %d Sectors\n",
|
|
info->size >> 10,
|
|
info->sector_count);
|
|
}
|
|
|
|
puts(" Sector Start Addresses:");
|
|
|
|
for (i = 0; i < info->sector_count; ++i) {
|
|
if ((i % 5) == 0)
|
|
puts("\n ");
|
|
|
|
printf(" %08lX%s",
|
|
info->start[i],
|
|
info->protect[i] ? " (RO)" : " ");
|
|
}
|
|
|
|
putc('\n');
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* The following code cannot be run from FLASH!
|
|
*/
|
|
|
|
static ulong flash_get_size(vu_long *addr, flash_info_t *info)
|
|
{
|
|
short i;
|
|
volatile unsigned char *caddr;
|
|
char value;
|
|
|
|
caddr = (volatile unsigned char *)addr ;
|
|
|
|
/* Write auto select command: read Manufacturer ID */
|
|
|
|
debug("Base address is: %8p\n", caddr);
|
|
|
|
caddr[0x0555] = 0xAA;
|
|
caddr[0x02AA] = 0x55;
|
|
caddr[0x0555] = 0x90;
|
|
|
|
value = caddr[0];
|
|
|
|
debug("Manufact ID: %02x\n", value);
|
|
|
|
switch (value) {
|
|
case 0x01: /*AMD_MANUFACT*/
|
|
info->flash_id = FLASH_MAN_AMD;
|
|
break;
|
|
|
|
case 0x04: /*FUJ_MANUFACT*/
|
|
info->flash_id = FLASH_MAN_FUJ;
|
|
break;
|
|
|
|
default:
|
|
info->flash_id = FLASH_UNKNOWN;
|
|
info->sector_count = 0;
|
|
info->size = 0;
|
|
break;
|
|
}
|
|
|
|
value = caddr[1]; /* device ID */
|
|
|
|
debug("Device ID: %02x\n", value);
|
|
|
|
switch (value) {
|
|
case AMD_ID_LV040B:
|
|
info->flash_id += FLASH_AM040;
|
|
info->sector_count = 8;
|
|
info->size = 0x00080000;
|
|
break; /* => 512Kb */
|
|
|
|
default:
|
|
info->flash_id = FLASH_UNKNOWN;
|
|
return 0; /* => no or unknown flash */
|
|
}
|
|
|
|
flash_get_offsets((ulong)addr, &flash_info[0]);
|
|
|
|
/* check for protected sectors */
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
/*
|
|
* read sector protection at sector address,
|
|
* (A7 .. A0) = 0x02
|
|
* D0 = 1 if protected
|
|
*/
|
|
caddr = (volatile unsigned char *)(info->start[i]);
|
|
info->protect[i] = caddr[2] & 1;
|
|
}
|
|
|
|
/*
|
|
* Prevent writes to uninitialized FLASH.
|
|
*/
|
|
if (info->flash_id != FLASH_UNKNOWN) {
|
|
caddr = (volatile unsigned char *)info->start[0];
|
|
*caddr = 0xF0; /* reset bank */
|
|
}
|
|
|
|
return info->size;
|
|
}
|
|
|
|
|
|
int flash_erase(flash_info_t *info, int s_first, int s_last)
|
|
{
|
|
volatile unsigned char *addr =
|
|
(volatile unsigned char *)(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;
|
|
}
|
|
|
|
if ((info->flash_id == FLASH_UNKNOWN) ||
|
|
(info->flash_id > FLASH_AMD_COMP)) {
|
|
printf("Can't erase unknown flash type - aborted\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] = 0xAA;
|
|
addr[0x02AA] = 0x55;
|
|
addr[0x0555] = 0x80;
|
|
addr[0x0555] = 0xAA;
|
|
addr[0x02AA] = 0x55;
|
|
|
|
/* Start erase on unprotected sectors */
|
|
for (sect = s_first; sect <= s_last; sect++) {
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
addr = (volatile unsigned char *)(info->start[sect]);
|
|
addr[0] = 0x30;
|
|
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 = (volatile unsigned char *)(info->start[l_sect]);
|
|
|
|
while ((addr[0] & 0xFF) != 0xFF) {
|
|
now = get_timer(start);
|
|
if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
|
|
printf("Timeout\n");
|
|
return 1;
|
|
}
|
|
/* show that we're waiting */
|
|
if ((now - last) > 1000) { /* every second */
|
|
putc('.');
|
|
last = now;
|
|
}
|
|
}
|
|
|
|
DONE:
|
|
/* reset to read mode */
|
|
addr = (volatile unsigned char *)info->start[0];
|
|
|
|
addr[0] = 0xF0; /* 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
|
|
*/
|
|
l = addr - wp;
|
|
|
|
if (l != 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);
|
|
|
|
rc = write_word(info, wp, data);
|
|
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
wp += 4;
|
|
}
|
|
|
|
/*
|
|
* handle word aligned part
|
|
*/
|
|
while (cnt >= 4) {
|
|
data = 0;
|
|
for (i = 0; i < 4; ++i)
|
|
data = (data << 8) | *src++;
|
|
|
|
rc = write_word(info, wp, data);
|
|
|
|
if (rc != 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)
|
|
{
|
|
volatile unsigned char *cdest, *cdata;
|
|
volatile unsigned char *addr =
|
|
(volatile unsigned char *)(info->start[0]);
|
|
ulong start;
|
|
int flag, count = 4 ;
|
|
|
|
cdest = (volatile unsigned char *)dest ;
|
|
cdata = (volatile unsigned char *)&data ;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*((vu_long *)dest)&data) != data)
|
|
return 2;
|
|
|
|
while (count--) {
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
addr[0x0555] = 0xAA;
|
|
addr[0x02AA] = 0x55;
|
|
addr[0x0555] = 0xA0;
|
|
|
|
*cdest = *cdata;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer(0);
|
|
while ((*cdest ^ *cdata) & 0x80) {
|
|
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
|
|
return 1;
|
|
}
|
|
|
|
cdata++ ;
|
|
cdest++ ;
|
|
}
|
|
return 0;
|
|
}
|