mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-24 02:48:51 +09:00
373 lines
9.0 KiB
C
373 lines
9.0 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 STM29W320DB/STM29W800D flash chips
|
|
*
|
|
*--------------------------------------------------------------------
|
|
* 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]; /* info for FLASH chips */
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Functions
|
|
*/
|
|
|
|
static ulong flash_get_size (vu_char *addr, flash_info_t *info);
|
|
static int write_byte (flash_info_t *info, ulong dest, uchar data);
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
|
|
unsigned long flash_init (void)
|
|
{
|
|
unsigned long size;
|
|
int i;
|
|
|
|
/* Init: no FLASHes known */
|
|
for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
|
|
flash_info[i].flash_id = FLASH_UNKNOWN;
|
|
}
|
|
|
|
/*
|
|
* We use the following trick here: since flash is cyclically
|
|
* mapped in the 0xFF800000-0xFFFFFFFF area, we detect the type
|
|
* and the size of flash using 0xFF800000 as the base address,
|
|
* and then call flash_get_size() again to fill flash_info.
|
|
*/
|
|
size = flash_get_size((vu_char *)CONFIG_SYS_FLASH_PRELIMBASE, &flash_info[0]);
|
|
if (size)
|
|
{
|
|
flash_get_size((vu_char *)(-size), &flash_info[0]);
|
|
}
|
|
|
|
#if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_PRELIMBASE)
|
|
/* 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
|
|
|
|
#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
|
|
# ifndef CONFIG_ENV_SIZE
|
|
# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
|
|
# endif
|
|
flash_protect(FLAG_PROTECT_SET,
|
|
CONFIG_ENV_ADDR,
|
|
CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
|
|
&flash_info[0]);
|
|
#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_STM:
|
|
printf ("ST ");
|
|
break;
|
|
default:
|
|
printf ("Unknown Vendor ");
|
|
break;
|
|
}
|
|
|
|
switch (info->flash_id & FLASH_TYPEMASK) {
|
|
case FLASH_STM320DB:
|
|
printf ("M29W320DB (32 Mbit)\n");
|
|
break;
|
|
case FLASH_STM800DB:
|
|
printf ("M29W800DB (8 Mbit, bottom boot block)\n");
|
|
break;
|
|
case FLASH_STM800DT:
|
|
printf ("M29W800DT (8 Mbit, top boot block)\n");
|
|
break;
|
|
default:
|
|
printf ("Unknown Chip Type\n");
|
|
break;
|
|
}
|
|
|
|
printf (" Size: %ld KB in %d Sectors\n",
|
|
info->size >> 10, 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_char *addr, flash_info_t *info)
|
|
{
|
|
short i;
|
|
uchar vendor, devid;
|
|
ulong base = (ulong)addr;
|
|
|
|
/* Write auto select command: read Manufacturer ID */
|
|
addr[0x0AAA] = 0xAA;
|
|
addr[0x0555] = 0x55;
|
|
addr[0x0AAA] = 0x90;
|
|
|
|
udelay(1000);
|
|
|
|
vendor = addr[0];
|
|
devid = addr[2];
|
|
|
|
/* only support STM */
|
|
if ((vendor << 16) != FLASH_MAN_STM) {
|
|
return 0;
|
|
}
|
|
|
|
if (devid == FLASH_STM320DB) {
|
|
/* MPC8240 can address maximum 2Mb of flash, that is why the MSB
|
|
* lead is grounded and we can access only 2 first Mb */
|
|
info->flash_id = vendor << 16 | devid;
|
|
info->sector_count = 32;
|
|
info->size = info->sector_count * 0x10000;
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
info->start[i] = base + i * 0x10000;
|
|
}
|
|
}
|
|
else if (devid == FLASH_STM800DB) {
|
|
info->flash_id = vendor << 16 | devid;
|
|
info->sector_count = 19;
|
|
info->size = 0x100000;
|
|
info->start[0] = 0x0000;
|
|
info->start[1] = 0x4000;
|
|
info->start[2] = 0x6000;
|
|
info->start[3] = 0x8000;
|
|
for (i = 4; i < info->sector_count; i++) {
|
|
info->start[i] = base + (i-3) * 0x10000;
|
|
}
|
|
}
|
|
else if (devid == FLASH_STM800DT) {
|
|
info->flash_id = vendor << 16 | devid;
|
|
info->sector_count = 19;
|
|
info->size = 0x100000;
|
|
for (i = 0; i < info->sector_count-4; i++) {
|
|
info->start[i] = base + i * 0x10000;
|
|
}
|
|
info->start[i] = base + i * 0x10000;
|
|
info->start[i+1] = base + i * 0x10000 + 0x8000;
|
|
info->start[i+2] = base + i * 0x10000 + 0xa000;
|
|
info->start[i+3] = base + i * 0x10000 + 0xc000;
|
|
}
|
|
else {
|
|
return 0;
|
|
}
|
|
|
|
/* mark all sectors as unprotected */
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
info->protect[i] = 0;
|
|
}
|
|
|
|
/* Issue the reset command */
|
|
if (info->flash_id != FLASH_UNKNOWN) {
|
|
addr[0] = 0xF0; /* reset bank */
|
|
}
|
|
|
|
return (info->size);
|
|
}
|
|
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
|
|
int flash_erase (flash_info_t *info, int s_first, int s_last)
|
|
{
|
|
vu_char *addr = (vu_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;
|
|
}
|
|
|
|
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[0x0AAA] = 0xAA;
|
|
addr[0x0555] = 0x55;
|
|
addr[0x0AAA] = 0x80;
|
|
addr[0x0AAA] = 0xAA;
|
|
addr[0x0555] = 0x55;
|
|
|
|
/* wait at least 80us - let's wait 1 ms */
|
|
udelay (1000);
|
|
|
|
/* Start erase on unprotected sectors */
|
|
for (sect = s_first; sect<=s_last; sect++) {
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
addr = (vu_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 = (vu_char *)(info->start[l_sect]);
|
|
while ((addr[0] & 0x80) != 0x80) {
|
|
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 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)
|
|
{
|
|
int rc;
|
|
|
|
while (cnt > 0) {
|
|
if ((rc = write_byte(info, addr, *src)) != 0) {
|
|
return (rc);
|
|
}
|
|
addr++;
|
|
src++;
|
|
cnt--;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Write a byte to Flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
static int write_byte (flash_info_t *info, ulong dest, uchar data)
|
|
{
|
|
vu_char *addr = (vu_char *)(info->start[0]);
|
|
ulong start;
|
|
int flag;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*((vu_char *)dest) & data) != data) {
|
|
return (2);
|
|
}
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
addr[0x0AAA] = 0xAA;
|
|
addr[0x0555] = 0x55;
|
|
addr[0x0AAA] = 0xA0;
|
|
|
|
*((vu_char *)dest) = data;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
while ((*((vu_char *)dest) & 0x80) != (data & 0x80)) {
|
|
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|