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u-boot/env/flash.c
Tom Rini 17ead040d4 Audit <flash.h> inclusion 
A large number of files include <flash.h> as it used to be how various
SPI flash related functions were found, or for other reasons entirely.
In order to migrate some further CONFIG symbols to Kconfig we need to
not include flash.h in cases where we don't have a NOR flash of some
sort enabled.  Furthermore, in cases where we are in common code and it
doesn't make sense to try and further refactor the code itself in to new
files we need to guard this inclusion.

Signed-off-by: Tom Rini <trini@konsulko.com>
2022-08-04 16:18:47 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (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>
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <env.h>
#include <env_internal.h>
#include <log.h>
#include <asm/global_data.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <search.h>
#include <errno.h>
#include <u-boot/crc.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SPL_BUILD
# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
# include <flash.h>
# define CMD_SAVEENV
# elif defined(CONFIG_ENV_ADDR_REDUND)
# error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
# endif
#endif
/* TODO(sjg@chromium.org): Figure out all these special cases */
#if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
!defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
!defined(CONFIG_TARGET_EDMINIV2)) || \
!defined(CONFIG_SPL_BUILD)
#define LOADENV
#endif
#if !defined(CONFIG_TARGET_X600) || !defined(CONFIG_SPL_BUILD)
#define INITENV
#endif
#if defined(CONFIG_ENV_ADDR_REDUND) && defined(CMD_SAVEENV) || \
!defined(CONFIG_ENV_ADDR_REDUND) && defined(INITENV)
#ifdef ENV_IS_EMBEDDED
static env_t *env_ptr = &embedded_environment;
#else /* ! ENV_IS_EMBEDDED */
static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
#endif /* ENV_IS_EMBEDDED */
#endif
static __maybe_unused env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
static ulong __maybe_unused end_addr =
CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
#ifdef CONFIG_ENV_ADDR_REDUND
static env_t __maybe_unused *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
static ulong __maybe_unused end_addr_new =
CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
#endif /* CONFIG_ENV_ADDR_REDUND */
#ifdef CONFIG_ENV_ADDR_REDUND
#ifdef INITENV
static int env_flash_init(void)
{
int crc1_ok = 0, crc2_ok = 0;
uchar flag1 = flash_addr->flags;
uchar flag2 = flash_addr_new->flags;
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 = ENV_VALID;
} else if (!crc1_ok && crc2_ok) {
gd->env_addr = addr2;
gd->env_valid = ENV_VALID;
} else if (!crc1_ok && !crc2_ok) {
gd->env_valid = ENV_INVALID;
} else if (flag1 == ENV_REDUND_ACTIVE &&
flag2 == ENV_REDUND_OBSOLETE) {
gd->env_addr = addr1;
gd->env_valid = ENV_VALID;
} else if (flag1 == ENV_REDUND_OBSOLETE &&
flag2 == ENV_REDUND_ACTIVE) {
gd->env_addr = addr2;
gd->env_valid = ENV_VALID;
} else if (flag1 == flag2) {
gd->env_addr = addr1;
gd->env_valid = ENV_REDUND;
} else if (flag1 == 0xFF) {
gd->env_addr = addr1;
gd->env_valid = ENV_REDUND;
} else if (flag2 == 0xFF) {
gd->env_addr = addr2;
gd->env_valid = ENV_REDUND;
}
return 0;
}
#endif
#ifdef CMD_SAVEENV
static int env_flash_save(void)
{
env_t env_new;
char *saved_data = NULL;
char flag = ENV_REDUND_OBSOLETE, new_flag = ENV_REDUND_ACTIVE;
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;
rc = env_export(&env_new);
if (rc)
return rc;
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:
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 */
#ifdef INITENV
static int env_flash_init(void)
{
if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
gd->env_addr = (ulong)&(env_ptr->data);
gd->env_valid = ENV_VALID;
return 0;
}
gd->env_valid = ENV_INVALID;
return 0;
}
#endif
#ifdef CMD_SAVEENV
static int env_flash_save(void)
{
env_t env_new;
int rc = 1;
char *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;
rc = env_export(&env_new);
if (rc)
goto done;
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:
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 */
#ifdef LOADENV
static int env_flash_load(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 != ENV_REDUND_OBSOLETE &&
crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
char flag = ENV_REDUND_OBSOLETE;
gd->env_valid = ENV_REDUND;
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 != ENV_REDUND_ACTIVE &&
(flash_addr->flags & ENV_REDUND_ACTIVE) == ENV_REDUND_ACTIVE) {
char flag = ENV_REDUND_ACTIVE;
gd->env_valid = ENV_REDUND;
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 == ENV_REDUND)
puts("*** Warning - some problems detected "
"reading environment; recovered successfully\n\n");
#endif /* CONFIG_ENV_ADDR_REDUND */
return env_import((char *)flash_addr, 1, H_EXTERNAL);
}
#endif /* LOADENV */
U_BOOT_ENV_LOCATION(flash) = {
.location = ENVL_FLASH,
ENV_NAME("Flash")
#ifdef LOADENV
.load = env_flash_load,
#endif
#ifdef CMD_SAVEENV
.save = env_save_ptr(env_flash_save),
#endif
#ifdef INITENV
.init = env_flash_init,
#endif
};
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