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/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.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
*/
/* #define DEBUG */
#include <common.h>
#if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */
#include <command.h>
#include <environment.h>
#include <cmd_nvedit.h>
#include <linux/stddef.h>
#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
#define CMD_SAVEENV
#elif defined(CFG_ENV_ADDR_REDUND)
#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
#endif
#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) && \
defined(CFG_ENV_ADDR_REDUND)
#error CFG_ENV_ADDR_REDUND should not be used when CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
#endif
#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
#endif
#ifdef CONFIG_INFERNO
# ifdef CFG_ENV_ADDR_REDUND
#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
# endif
#endif
char * env_name_spec = "Flash";
#ifdef ENV_IS_EMBEDDED
extern uchar environment[];
env_t *env_ptr = (env_t *)(&environment[0]);
#ifdef CMD_SAVEENV
/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
#endif
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
#ifdef CMD_SAVEENV
static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
#endif
#endif /* ENV_IS_EMBEDDED */
#ifdef CFG_ENV_ADDR_REDUND
static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND;
static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SIZE - 1;
static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1;
static uchar active_flag = 1;
static uchar obsolete_flag = 0;
#endif
extern uchar default_environment[];
extern int default_environment_size;
uchar env_get_char_spec (int index)
{
DECLARE_GLOBAL_DATA_PTR;
return ( *((uchar *)(gd->env_addr + index)) );
}
#ifdef CFG_ENV_ADDR_REDUND
int env_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
int crc1_ok =
(crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
int crc2_ok =
(crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
uchar flag1 = flash_addr->flags;
uchar flag2 = flash_addr_new->flags;
ulong addr_default = (ulong)&default_environment[0];
ulong addr1 = (ulong)&(flash_addr->data);
ulong addr2 = (ulong)&(flash_addr_new->data);
if (crc1_ok && ! crc2_ok)
{
gd->env_addr = addr1;
gd->env_valid = 1;
}
else if (! crc1_ok && crc2_ok)
{
gd->env_addr = addr2;
gd->env_valid = 1;
}
else if (! crc1_ok && ! crc2_ok)
{
gd->env_addr = addr_default;
gd->env_valid = 0;
}
else if (flag1 == active_flag && flag2 == obsolete_flag)
{
gd->env_addr = addr1;
gd->env_valid = 1;
}
else if (flag1 == obsolete_flag && flag2 == active_flag)
{
gd->env_addr = addr2;
gd->env_valid = 1;
}
else if (flag1 == flag2)
{
gd->env_addr = addr1;
gd->env_valid = 2;
}
else if (flag1 == 0xFF)
{
gd->env_addr = addr1;
gd->env_valid = 2;
}
else if (flag2 == 0xFF)
{
gd->env_addr = addr2;
gd->env_valid = 2;
}
return (0);
}
#ifdef CMD_SAVEENV
int saveenv(void)
{
int rc = 1;
debug ("Protect off %08lX ... %08lX\n",
(ulong)flash_addr, end_addr);
if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
goto Done;
}
debug ("Protect off %08lX ... %08lX\n",
(ulong)flash_addr_new, end_addr_new);
if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
goto Done;
}
puts ("Erasing Flash...");
debug (" %08lX ... %08lX ...",
(ulong)flash_addr_new, end_addr_new);
if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
goto Done;
}
puts ("Writing to Flash... ");
debug (" %08lX ... %08lX ...",
(ulong)&(flash_addr_new->data),
sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
if (flash_write(env_ptr->data,
(ulong)&(flash_addr_new->data),
sizeof(env_ptr->data)) ||
flash_write((char *)&(env_ptr->crc),
(ulong)&(flash_addr_new->crc),
sizeof(env_ptr->crc)) ||
flash_write((char *)&obsolete_flag,
(ulong)&(flash_addr->flags),
sizeof(flash_addr->flags)) ||
flash_write((char *)&active_flag,
(ulong)&(flash_addr_new->flags),
sizeof(flash_addr_new->flags)))
{
flash_perror (rc);
goto Done;
}
puts ("done\n");
{
env_t * etmp = flash_addr;
ulong ltmp = end_addr;
flash_addr = flash_addr_new;
flash_addr_new = etmp;
end_addr = end_addr_new;
end_addr_new = ltmp;
}
rc = 0;
Done:
/* try to re-protect */
(void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
(void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
return rc;
}
#endif /* CMD_SAVEENV */
#else /* ! CFG_ENV_ADDR_REDUND */
int env_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
gd->env_addr = (ulong)&(env_ptr->data);
gd->env_valid = 1;
} else {
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 0;
}
return (0);
}
#ifdef CMD_SAVEENV
int saveenv(void)
{
int len, rc;
ulong end_addr;
ulong flash_sect_addr;
#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
ulong flash_offset;
uchar env_buffer[CFG_ENV_SECT_SIZE];
#else
uchar *env_buffer = (char *)env_ptr;
#endif /* CFG_ENV_SECT_SIZE */
int rcode = 0;
#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
debug ( "copy old content: "
"sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
flash_sect_addr, (ulong)flash_addr, flash_offset);
/* copy old contents to temporary buffer */
memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
/* copy current environment to temporary buffer */
memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
env_ptr,
CFG_ENV_SIZE);
len = CFG_ENV_SECT_SIZE;
#else
flash_sect_addr = (ulong)flash_addr;
len = CFG_ENV_SIZE;
#endif /* CFG_ENV_SECT_SIZE */
#ifndef CONFIG_INFERNO
end_addr = flash_sect_addr + len - 1;
#else
/* this is the last sector, and the size is hardcoded here */
/* otherwise we will get stack problems on loading 128 KB environment */
end_addr = flash_sect_addr + 0x20000 - 1;
#endif
debug ("Protect off %08lX ... %08lX\n",
(ulong)flash_sect_addr, end_addr);
if (flash_sect_protect (0, flash_sect_addr, end_addr))
return 1;
puts ("Erasing Flash...");
if (flash_sect_erase (flash_sect_addr, end_addr))
return 1;
puts ("Writing to Flash... ");
rc = flash_write(env_buffer, flash_sect_addr, len);
if (rc != 0) {
flash_perror (rc);
rcode = 1;
} else {
puts ("done\n");
}
/* try to re-protect */
(void) flash_sect_protect (1, flash_sect_addr, end_addr);
return rcode;
}
#endif /* CMD_SAVEENV */
#endif /* CFG_ENV_ADDR_REDUND */
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
#ifdef CFG_ENV_ADDR_REDUND
DECLARE_GLOBAL_DATA_PTR;
if (gd->env_addr != (ulong)&(flash_addr->data))
{
env_t * etmp = flash_addr;
ulong ltmp = end_addr;
flash_addr = flash_addr_new;
flash_addr_new = etmp;
end_addr = end_addr_new;
end_addr_new = ltmp;
}
if (flash_addr_new->flags != obsolete_flag &&
crc32(0, flash_addr_new->data, ENV_SIZE) ==
flash_addr_new->crc)
{
gd->env_valid = 2;
flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
flash_write((char *)&obsolete_flag,
(ulong)&(flash_addr_new->flags),
sizeof(flash_addr_new->flags));
flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
}
if (flash_addr->flags != active_flag &&
(flash_addr->flags & active_flag) == active_flag)
{
gd->env_valid = 2;
flash_sect_protect (0, (ulong)flash_addr, end_addr);
flash_write((char *)&active_flag,
(ulong)&(flash_addr->flags),
sizeof(flash_addr->flags));
flash_sect_protect (1, (ulong)flash_addr, end_addr);
}
if (gd->env_valid == 2)
puts ("*** Warning - some problems detected "
"reading environment; recovered successfully\n\n");
#endif /* CFG_ENV_ADDR_REDUND */
memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
#endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
}
#endif /* CFG_ENV_IS_IN_FLASH */
|
