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u-boot/common/env_sf.c
Ying Zhang 5a89fa927c SPL: P2020RDB: fix the problem booting from spi flash 
There was no enough stack in SPL, so the buffer needed in SPL is to malloc
from memory pool and to repalce the temporary variable.

Signed-off-by: Ying Zhang <b40530@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
2014-02-24 15:23:19 -08:00

340 lines
7.4 KiB
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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>
*
* (C) Copyright 2008 Atmel Corporation
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <environment.h>
#include <malloc.h>
#include <spi_flash.h>
#include <search.h>
#include <errno.h>
#ifndef CONFIG_ENV_SPI_BUS
# define CONFIG_ENV_SPI_BUS 0
#endif
#ifndef CONFIG_ENV_SPI_CS
# define CONFIG_ENV_SPI_CS 0
#endif
#ifndef CONFIG_ENV_SPI_MAX_HZ
# define CONFIG_ENV_SPI_MAX_HZ 1000000
#endif
#ifndef CONFIG_ENV_SPI_MODE
# define CONFIG_ENV_SPI_MODE SPI_MODE_3
#endif
#ifdef CONFIG_ENV_OFFSET_REDUND
static ulong env_offset = CONFIG_ENV_OFFSET;
static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
#define ACTIVE_FLAG 1
#define OBSOLETE_FLAG 0
#endif /* CONFIG_ENV_OFFSET_REDUND */
DECLARE_GLOBAL_DATA_PTR;
char *env_name_spec = "SPI Flash";
static struct spi_flash *env_flash;
#if defined(CONFIG_ENV_OFFSET_REDUND)
int saveenv(void)
{
env_t env_new;
ssize_t len;
char *res, *saved_buffer = NULL, flag = OBSOLETE_FLAG;
u32 saved_size, saved_offset, sector = 1;
int ret;
if (!env_flash) {
env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
CONFIG_ENV_SPI_CS,
CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
if (!env_flash) {
set_default_env("!spi_flash_probe() failed");
return 1;
}
}
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);
return 1;
}
env_new.crc = crc32(0, env_new.data, ENV_SIZE);
env_new.flags = ACTIVE_FLAG;
if (gd->env_valid == 1) {
env_new_offset = CONFIG_ENV_OFFSET_REDUND;
env_offset = CONFIG_ENV_OFFSET;
} else {
env_new_offset = CONFIG_ENV_OFFSET;
env_offset = CONFIG_ENV_OFFSET_REDUND;
}
/* Is the sector larger than the env (i.e. embedded) */
if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
saved_offset = env_new_offset + CONFIG_ENV_SIZE;
saved_buffer = malloc(saved_size);
if (!saved_buffer) {
ret = 1;
goto done;
}
ret = spi_flash_read(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
sector++;
}
puts("Erasing SPI flash...");
ret = spi_flash_erase(env_flash, env_new_offset,
sector * CONFIG_ENV_SECT_SIZE);
if (ret)
goto done;
puts("Writing to SPI flash...");
ret = spi_flash_write(env_flash, env_new_offset,
CONFIG_ENV_SIZE, &env_new);
if (ret)
goto done;
if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
ret = spi_flash_write(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
sizeof(env_new.flags), &flag);
if (ret)
goto done;
puts("done\n");
gd->env_valid = gd->env_valid == 2 ? 1 : 2;
printf("Valid environment: %d\n", (int)gd->env_valid);
done:
if (saved_buffer)
free(saved_buffer);
return ret;
}
void env_relocate_spec(void)
{
int ret;
int crc1_ok = 0, crc2_ok = 0;
env_t *tmp_env1 = NULL;
env_t *tmp_env2 = NULL;
env_t *ep = NULL;
tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
if (!tmp_env1 || !tmp_env2) {
set_default_env("!malloc() failed");
goto out;
}
env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
if (!env_flash) {
set_default_env("!spi_flash_probe() failed");
goto out;
}
ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
CONFIG_ENV_SIZE, tmp_env1);
if (ret) {
set_default_env("!spi_flash_read() failed");
goto err_read;
}
if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
crc1_ok = 1;
ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
CONFIG_ENV_SIZE, tmp_env2);
if (!ret) {
if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
crc2_ok = 1;
}
if (!crc1_ok && !crc2_ok) {
set_default_env("!bad CRC");
goto err_read;
} else if (crc1_ok && !crc2_ok) {
gd->env_valid = 1;
} else if (!crc1_ok && crc2_ok) {
gd->env_valid = 2;
} else if (tmp_env1->flags == ACTIVE_FLAG &&
tmp_env2->flags == OBSOLETE_FLAG) {
gd->env_valid = 1;
} else if (tmp_env1->flags == OBSOLETE_FLAG &&
tmp_env2->flags == ACTIVE_FLAG) {
gd->env_valid = 2;
} else if (tmp_env1->flags == tmp_env2->flags) {
gd->env_valid = 2;
} else if (tmp_env1->flags == 0xFF) {
gd->env_valid = 2;
} else {
/*
* this differs from code in env_flash.c, but I think a sane
* default path is desirable.
*/
gd->env_valid = 2;
}
if (gd->env_valid == 1)
ep = tmp_env1;
else
ep = tmp_env2;
ret = env_import((char *)ep, 0);
if (!ret) {
error("Cannot import environment: errno = %d\n", errno);
set_default_env("env_import failed");
}
err_read:
spi_flash_free(env_flash);
env_flash = NULL;
out:
free(tmp_env1);
free(tmp_env2);
}
#else
int saveenv(void)
{
u32 saved_size, saved_offset, sector = 1;
char *res, *saved_buffer = NULL;
int ret = 1;
env_t env_new;
ssize_t len;
if (!env_flash) {
env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
CONFIG_ENV_SPI_CS,
CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
if (!env_flash) {
set_default_env("!spi_flash_probe() failed");
return 1;
}
}
/* Is the sector larger than the env (i.e. embedded) */
if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
saved_buffer = malloc(saved_size);
if (!saved_buffer)
goto done;
ret = spi_flash_read(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
sector++;
}
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 SPI flash...");
ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
sector * CONFIG_ENV_SECT_SIZE);
if (ret)
goto done;
puts("Writing to SPI flash...");
ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
CONFIG_ENV_SIZE, &env_new);
if (ret)
goto done;
if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
ret = spi_flash_write(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
ret = 0;
puts("done\n");
done:
if (saved_buffer)
free(saved_buffer);
return ret;
}
void env_relocate_spec(void)
{
int ret;
char *buf = NULL;
buf = (char *)malloc(CONFIG_ENV_SIZE);
env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
if (!env_flash) {
set_default_env("!spi_flash_probe() failed");
if (buf)
free(buf);
return;
}
ret = spi_flash_read(env_flash,
CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
if (ret) {
set_default_env("!spi_flash_read() failed");
goto out;
}
ret = env_import(buf, 1);
if (ret)
gd->env_valid = 1;
out:
spi_flash_free(env_flash);
if (buf)
free(buf);
env_flash = NULL;
}
#endif
int env_init(void)
{
/* SPI flash isn't usable before relocation */
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
return 0;
}
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