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u-boot/env/sf.c
Pali Rohár f4bf81b013 env: sf: Allow to use env_sf_init_addr() at any stage 
In some cases it makes sense to use env_sf_init_addr() also in SPL mode.
Allow it for boards by providing custom implementation of weak function
env_sf_get_env_addr(). When this function returns NULL it signals that
address is invalid, like config option CONFIG_ENV_ADDR.

There is no change in default behavior or in config options.

Signed-off-by: Pali Rohár <pali@kernel.org>
2022-05-02 07:28:25 +02:00

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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>
*
* (C) Copyright 2008 Atmel Corporation
*/
#include <common.h>
#include <dm.h>
#include <env.h>
#include <env_internal.h>
#include <flash.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include <search.h>
#include <errno.h>
#include <uuid.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <dm/device-internal.h>
#include <u-boot/crc.h>
#define OFFSET_INVALID (~(u32)0)
#ifdef CONFIG_ENV_OFFSET_REDUND
#define ENV_OFFSET_REDUND CONFIG_ENV_OFFSET_REDUND
static ulong env_offset = CONFIG_ENV_OFFSET;
static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
#else
#define ENV_OFFSET_REDUND OFFSET_INVALID
#endif /* CONFIG_ENV_OFFSET_REDUND */
DECLARE_GLOBAL_DATA_PTR;
static int setup_flash_device(struct spi_flash **env_flash)
{
#if CONFIG_IS_ENABLED(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) {
env_set_default("spi_flash_probe_bus_cs() failed", 0);
return ret;
}
*env_flash = dev_get_uclass_priv(new);
#else
*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) {
env_set_default("spi_flash_probe() failed", 0);
return -EIO;
}
#endif
return 0;
}
#if defined(CONFIG_ENV_OFFSET_REDUND)
static int env_sf_save(void)
{
env_t env_new;
char *saved_buffer = NULL, flag = ENV_REDUND_OBSOLETE;
u32 saved_size = 0, saved_offset = 0, sector;
u32 sect_size = CONFIG_ENV_SECT_SIZE;
int ret;
struct spi_flash *env_flash;
ret = setup_flash_device(&env_flash);
if (ret)
return ret;
if (IS_ENABLED(CONFIG_ENV_SECT_SIZE_AUTO))
sect_size = env_flash->mtd.erasesize;
ret = env_export(&env_new);
if (ret)
return -EIO;
env_new.flags = ENV_REDUND_ACTIVE;
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 (sect_size > CONFIG_ENV_SIZE) {
saved_size = 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, sect_size);
puts("Erasing SPI flash...");
ret = spi_flash_erase(env_flash, env_new_offset,
sector * 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 (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:
spi_flash_free(env_flash);
if (saved_buffer)
free(saved_buffer);
return ret;
}
static int env_sf_load(void)
{
int ret;
int read1_fail, read2_fail;
env_t *tmp_env1, *tmp_env2;
struct spi_flash *env_flash;
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) {
env_set_default("malloc() failed", 0);
ret = -EIO;
goto out;
}
ret = setup_flash_device(&env_flash);
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, H_EXTERNAL);
spi_flash_free(env_flash);
out:
free(tmp_env1);
free(tmp_env2);
return ret;
}
#else
static int env_sf_save(void)
{
u32 saved_size = 0, saved_offset = 0, sector;
u32 sect_size = CONFIG_ENV_SECT_SIZE;
char *saved_buffer = NULL;
int ret = 1;
env_t env_new;
struct spi_flash *env_flash;
ret = setup_flash_device(&env_flash);
if (ret)
return ret;
if (IS_ENABLED(CONFIG_ENV_SECT_SIZE_AUTO))
sect_size = env_flash->mtd.erasesize;
/* Is the sector larger than the env (i.e. embedded) */
if (sect_size > CONFIG_ENV_SIZE) {
saved_size = 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, sect_size);
puts("Erasing SPI flash...");
ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
sector * 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 (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:
spi_flash_free(env_flash);
if (saved_buffer)
free(saved_buffer);
return ret;
}
static int env_sf_load(void)
{
int ret;
char *buf = NULL;
struct spi_flash *env_flash;
buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
if (!buf) {
env_set_default("malloc() failed", 0);
return -EIO;
}
ret = setup_flash_device(&env_flash);
if (ret)
goto out;
ret = spi_flash_read(env_flash,
CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
if (ret) {
env_set_default("spi_flash_read() failed", 0);
goto err_read;
}
ret = env_import(buf, 1, H_EXTERNAL);
if (!ret)
gd->env_valid = ENV_VALID;
err_read:
spi_flash_free(env_flash);
out:
free(buf);
return ret;
}
#endif
static int env_sf_erase(void)
{
int ret;
env_t env;
struct spi_flash *env_flash;
ret = setup_flash_device(&env_flash);
if (ret)
return ret;
memset(&env, 0, sizeof(env_t));
ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, &env);
if (ret)
goto done;
if (ENV_OFFSET_REDUND != OFFSET_INVALID)
ret = spi_flash_write(env_flash, ENV_OFFSET_REDUND, CONFIG_ENV_SIZE, &env);
done:
spi_flash_free(env_flash);
return ret;
}
__weak void *env_sf_get_env_addr(void)
{
#ifndef CONFIG_SPL_BUILD
return (void *)CONFIG_ENV_ADDR;
#else
return NULL;
#endif
}
/*
* check if Environment on CONFIG_ENV_ADDR is valid.
*/
static int env_sf_init_addr(void)
{
env_t *env_ptr = (env_t *)env_sf_get_env_addr();
if (!env_ptr)
return -ENOENT;
if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
gd->env_addr = (ulong)&(env_ptr->data);
gd->env_valid = ENV_VALID;
} else {
gd->env_valid = ENV_INVALID;
}
return 0;
}
#if defined(CONFIG_ENV_SPI_EARLY)
/*
* early load environment from SPI flash (before relocation)
* and check if it is valid.
*/
static int env_sf_init_early(void)
{
int ret;
int read1_fail;
int read2_fail;
int crc1_ok;
env_t *tmp_env2 = NULL;
env_t *tmp_env1;
struct spi_flash *env_flash;
/*
* if malloc is not ready yet, we cannot use
* this part yet.
*/
if (!gd->malloc_limit)
return -ENOENT;
tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT))
tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
if (!tmp_env1 || !tmp_env2)
goto out;
ret = setup_flash_device(&env_flash);
if (ret)
goto out;
read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
CONFIG_ENV_SIZE, tmp_env1);
if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) {
read2_fail = spi_flash_read(env_flash,
CONFIG_ENV_OFFSET_REDUND,
CONFIG_ENV_SIZE, tmp_env2);
ret = env_check_redund((char *)tmp_env1, read1_fail,
(char *)tmp_env2, read2_fail);
if (ret < 0)
goto err_read;
if (gd->env_valid == ENV_VALID)
gd->env_addr = (unsigned long)&tmp_env1->data;
else
gd->env_addr = (unsigned long)&tmp_env2->data;
} else {
if (read1_fail)
goto err_read;
crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
tmp_env1->crc;
if (!crc1_ok)
goto err_read;
/* if valid -> this is our env */
gd->env_valid = ENV_VALID;
gd->env_addr = (unsigned long)&tmp_env1->data;
}
spi_flash_free(env_flash);
return 0;
err_read:
spi_flash_free(env_flash);
free(tmp_env1);
if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT))
free(tmp_env2);
out:
/* env is not valid. always return 0 */
gd->env_valid = ENV_INVALID;
return 0;
}
#endif
static int env_sf_init(void)
{
int ret = env_sf_init_addr();
if (ret != -ENOENT)
return ret;
#ifdef CONFIG_ENV_SPI_EARLY
return env_sf_init_early();
#endif
/*
* return here -ENOENT, so env_init()
* can set the init bit and later if no
* other Environment storage is defined
* can set the default environment
*/
return -ENOENT;
}
U_BOOT_ENV_LOCATION(sf) = {
.location = ENVL_SPI_FLASH,
ENV_NAME("SPIFlash")
.load = env_sf_load,
.save = ENV_SAVE_PTR(env_sf_save),
.erase = ENV_ERASE_PTR(env_sf_erase),
.init = env_sf_init,
};
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