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u-boot/common/env_flash.c
Wolfgang Denk 1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files 
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00

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/*
* (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
* SPDX-License-Identifier: GPL-2.0+
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <search.h>
#include <errno.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
#define CMD_SAVEENV
#elif defined(CONFIG_ENV_ADDR_REDUND)
#error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
#endif
#if defined(CONFIG_ENV_SIZE_REDUND) && \
(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
#endif
char *env_name_spec = "Flash";
#ifdef ENV_IS_EMBEDDED
env_t *env_ptr = &environment;
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
#endif /* ENV_IS_EMBEDDED */
#if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
#endif
#ifdef CONFIG_ENV_ADDR_REDUND
static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
#endif /* CONFIG_ENV_ADDR_REDUND */
#ifdef CONFIG_ENV_ADDR_REDUND
int env_init(void)
{
int crc1_ok = 0, crc2_ok = 0;
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);
crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
crc2_ok =
crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
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)
{
env_t env_new;
ssize_t len;
char *res, *saved_data = NULL;
char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
int rc = 1;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ulong up_data = 0;
#endif
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;
res = (char *)&env_new.data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
goto done;
}
env_new.crc = crc32(0, env_new.data, ENV_SIZE);
env_new.flags = new_flag;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
debug("Data to save 0x%lX\n", up_data);
if (up_data) {
saved_data = malloc(up_data);
if (saved_data == NULL) {
printf("Unable to save the rest of sector (%ld)\n",
up_data);
goto done;
}
memcpy(saved_data,
(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
up_data);
debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
(long)flash_addr_new + CONFIG_ENV_SIZE,
up_data, saved_data);
}
#endif
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));
rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
sizeof(env_new));
if (rc)
goto perror;
rc = flash_write(&flag, (ulong)&(flash_addr->flags),
sizeof(flash_addr->flags));
if (rc)
goto perror;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
if (up_data) { /* restore the rest of sector */
debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
if (flash_write(saved_data,
(long)flash_addr_new + CONFIG_ENV_SIZE,
up_data))
goto perror;
}
#endif
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;
goto done;
perror:
flash_perror(rc);
done:
if (saved_data)
free(saved_data);
/* try to re-protect */
flash_sect_protect(1, (ulong)flash_addr, end_addr);
flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
return rc;
}
#endif /* CMD_SAVEENV */
#else /* ! CONFIG_ENV_ADDR_REDUND */
int env_init(void)
{
if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
gd->env_addr = (ulong)&(env_ptr->data);
gd->env_valid = 1;
return 0;
}
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 0;
return 0;
}
#ifdef CMD_SAVEENV
int saveenv(void)
{
env_t env_new;
ssize_t len;
int rc = 1;
char *res, *saved_data = NULL;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ulong up_data = 0;
up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
debug("Data to save 0x%lx\n", up_data);
if (up_data) {
saved_data = malloc(up_data);
if (saved_data == NULL) {
printf("Unable to save the rest of sector (%ld)\n",
up_data);
goto done;
}
memcpy(saved_data,
(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
(ulong)flash_addr + CONFIG_ENV_SIZE,
up_data,
(ulong)saved_data);
}
#endif /* CONFIG_ENV_SECT_SIZE */
debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
if (flash_sect_protect(0, (long)flash_addr, end_addr))
goto done;
res = (char *)&env_new.data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
goto done;
}
env_new.crc = crc32(0, env_new.data, ENV_SIZE);
puts("Erasing Flash...");
if (flash_sect_erase((long)flash_addr, end_addr))
goto done;
puts("Writing to Flash... ");
rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
if (rc != 0)
goto perror;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
if (up_data) { /* restore the rest of sector */
debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
if (flash_write(saved_data,
(long)flash_addr + CONFIG_ENV_SIZE,
up_data))
goto perror;
}
#endif
puts("done\n");
rc = 0;
goto done;
perror:
flash_perror(rc);
done:
if (saved_data)
free(saved_data);
/* try to re-protect */
flash_sect_protect(1, (long)flash_addr, end_addr);
return rc;
}
#endif /* CMD_SAVEENV */
#endif /* CONFIG_ENV_ADDR_REDUND */
void env_relocate_spec(void)
{
#ifdef CONFIG_ENV_ADDR_REDUND
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) {
char flag = OBSOLETE_FLAG;
gd->env_valid = 2;
flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
flash_write(&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) {
char flag = ACTIVE_FLAG;
gd->env_valid = 2;
flash_sect_protect(0, (ulong)flash_addr, end_addr);
flash_write(&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 /* CONFIG_ENV_ADDR_REDUND */
env_import((char *)flash_addr, 1);
}
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