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u-boot-brain/env/sf.c
Heiko Schocher 9ba5e5bc26 Revert "env: add spi_flash_read_env function" 
This reverts commit 9a9d66f5ef.

because it breaks fw_setenv and U-Boot interworking, if
U-Boot environment is stored in a SPI-NOR.

Reproduce it with:
boot linux with empty Environment and store a variable
with fw_setenv into it, the Environment is now filled
with 0xff:

root@ckey5e:10:8e:~# hexdump -C /dev/mtd4
00000000  e9 e8 07 fa 01 62 6f 6f  74 63 6d 64 3d 72 75 6e  |.....bootcmd=run|
[...]
00000f30  7d 00 75 62 69 62 6f 6f  74 76 6f 6c 3d 32 00 00  |}.ubibootvol=2..|
00000f40  00 ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|

Boot now U-Boot prints:

Loading Environment from SPI Flash... SF: Detected s25fl128l with page size 256 Bytes, erase size 4 KiB, total 16 MiB
*** Warning - bad CRC, using default environment

Reason is the above commit, as it only reads until \0\0
is found, and assumes the rest of the Environment
space is filled with 0x00, which is not the case when
saving an Environment under linux with fw_setenv.

Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>
2019-03-13 20:32:09 -04:00

336 lines
6.9 KiB
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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>
*
* (C) Copyright 2008 Atmel Corporation
*/
#include <common.h>
#include <dm.h>
#include <environment.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include <search.h>
#include <errno.h>
#include <dm/device-internal.h>
#ifndef CONFIG_ENV_SPI_BUS
# define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
#endif
#ifndef CONFIG_ENV_SPI_CS
# define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
#endif
#ifndef CONFIG_ENV_SPI_MAX_HZ
# define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
#endif
#ifndef CONFIG_ENV_SPI_MODE
# define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
#endif
#ifndef CONFIG_SPL_BUILD
#define CMD_SAVEENV
#define INITENV
#endif
#ifdef CONFIG_ENV_OFFSET_REDUND
#ifdef CMD_SAVEENV
static ulong env_offset = CONFIG_ENV_OFFSET;
static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
#endif
#define ACTIVE_FLAG 1
#define OBSOLETE_FLAG 0
#endif /* CONFIG_ENV_OFFSET_REDUND */
DECLARE_GLOBAL_DATA_PTR;
static struct spi_flash *env_flash;
static int setup_flash_device(void)
{
#ifdef CONFIG_DM_SPI_FLASH
struct udevice *new;
int ret;
/* speed and mode will be read from DT */
ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
&new);
if (ret) {
set_default_env("spi_flash_probe_bus_cs() failed", 0);
return ret;
}
env_flash = dev_get_uclass_priv(new);
#else
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", 0);
return -EIO;
}
}
#endif
return 0;
}
#if defined(CONFIG_ENV_OFFSET_REDUND)
#ifdef CMD_SAVEENV
static int env_sf_save(void)
{
env_t env_new;
char *saved_buffer = NULL, flag = OBSOLETE_FLAG;
u32 saved_size, saved_offset, sector;
int ret;
ret = setup_flash_device();
if (ret)
return ret;
ret = env_export(&env_new);
if (ret)
return -EIO;
env_new.flags = ACTIVE_FLAG;
if (gd->env_valid == ENV_VALID) {
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 = memalign(ARCH_DMA_MINALIGN, saved_size);
if (!saved_buffer) {
ret = -ENOMEM;
goto done;
}
ret = spi_flash_read(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
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 == ENV_REDUND ? ENV_VALID : ENV_REDUND;
printf("Valid environment: %d\n", (int)gd->env_valid);
done:
if (saved_buffer)
free(saved_buffer);
return ret;
}
#endif /* CMD_SAVEENV */
static int env_sf_load(void)
{
int ret;
int read1_fail, read2_fail;
env_t *tmp_env1, *tmp_env2;
tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
if (!tmp_env1 || !tmp_env2) {
set_default_env("malloc() failed", 0);
ret = -EIO;
goto out;
}
ret = setup_flash_device();
if (ret)
goto out;
read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
CONFIG_ENV_SIZE, tmp_env1);
read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
CONFIG_ENV_SIZE, tmp_env2);
ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
read2_fail);
spi_flash_free(env_flash);
env_flash = NULL;
out:
free(tmp_env1);
free(tmp_env2);
return ret;
}
#else
#ifdef CMD_SAVEENV
static int env_sf_save(void)
{
u32 saved_size, saved_offset, sector;
char *saved_buffer = NULL;
int ret = 1;
env_t env_new;
ret = setup_flash_device();
if (ret)
return ret;
/* 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;
}
ret = env_export(&env_new);
if (ret)
goto done;
sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_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;
}
#endif /* CMD_SAVEENV */
static int env_sf_load(void)
{
int ret;
char *buf = NULL;
buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
if (!buf) {
set_default_env("malloc() failed", 0);
return -EIO;
}
ret = setup_flash_device();
if (ret)
goto out;
ret = spi_flash_read(env_flash,
CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
if (ret) {
set_default_env("spi_flash_read() failed", 0);
goto err_read;
}
ret = env_import(buf, 1);
if (!ret)
gd->env_valid = ENV_VALID;
err_read:
spi_flash_free(env_flash);
env_flash = NULL;
out:
free(buf);
return ret;
}
#endif
#ifdef CONFIG_ENV_ADDR
__weak void *env_sf_get_env_addr(void)
{
return (void *)CONFIG_ENV_ADDR;
}
#endif
#if defined(INITENV) && defined(CONFIG_ENV_ADDR)
static int env_sf_init(void)
{
env_t *env_ptr = (env_t *)env_sf_get_env_addr();
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 = 1;
}
return 0;
}
#endif
U_BOOT_ENV_LOCATION(sf) = {
.location = ENVL_SPI_FLASH,
ENV_NAME("SPI Flash")
.load = env_sf_load,
#ifdef CMD_SAVEENV
.save = env_save_ptr(env_sf_save),
#endif
#if defined(INITENV) && defined(CONFIG_ENV_ADDR)
.init = env_sf_init,
#endif
};
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