u-boot/common/env_mmc.c

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/*
* (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <environment.h>
#include <fdtdec.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <memalign.h>
#include <mmc.h>
#include <search.h>
#include <errno.h>
#if defined(CONFIG_ENV_SIZE_REDUND) && \
(CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
#endif
char *env_name_spec = "MMC";
#ifdef ENV_IS_EMBEDDED
env_t *env_ptr = &environment;
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr;
#endif /* ENV_IS_EMBEDDED */
DECLARE_GLOBAL_DATA_PTR;
#if !defined(CONFIG_ENV_OFFSET)
#define CONFIG_ENV_OFFSET 0
#endif
#if CONFIG_IS_ENABLED(OF_CONTROL)
static inline s64 mmc_offset(int copy)
{
const char *propname = "u-boot,mmc-env-offset";
s64 defvalue = CONFIG_ENV_OFFSET;
#if defined(CONFIG_ENV_OFFSET_REDUND)
if (copy) {
propname = "u-boot,mmc-env-offset-redundant";
defvalue = CONFIG_ENV_OFFSET_REDUND;
}
#endif
return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
}
#else
static inline s64 mmc_offset(int copy)
{
s64 offset = CONFIG_ENV_OFFSET;
#if defined(CONFIG_ENV_OFFSET_REDUND)
if (copy)
offset = CONFIG_ENV_OFFSET_REDUND;
#endif
return offset;
}
#endif
__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
{
s64 offset = mmc_offset(copy);
if (offset < 0)
offset += mmc->capacity;
*env_addr = offset;
return 0;
}
__weak int mmc_get_env_dev(void)
{
return CONFIG_SYS_MMC_ENV_DEV;
}
int env_init(void)
{
/* use default */
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
return 0;
}
#ifdef CONFIG_SYS_MMC_ENV_PART
__weak uint mmc_get_env_part(struct mmc *mmc)
{
return CONFIG_SYS_MMC_ENV_PART;
}
static unsigned char env_mmc_orig_hwpart;
static int mmc_set_env_part(struct mmc *mmc)
{
uint part = mmc_get_env_part(mmc);
int dev = mmc_get_env_dev();
int ret = 0;
env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
if (ret)
puts("MMC partition switch failed\n");
return ret;
}
#else
static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
#endif
static const char *init_mmc_for_env(struct mmc *mmc)
{
if (!mmc)
return "!No MMC card found";
#ifdef CONFIG_BLK
struct udevice *dev;
if (blk_get_from_parent(mmc->dev, &dev))
return "!No block device";
#else
if (mmc_init(mmc))
return "!MMC init failed";
#endif
if (mmc_set_env_part(mmc))
return "!MMC partition switch failed";
return NULL;
}
static void fini_mmc_for_env(struct mmc *mmc)
{
#ifdef CONFIG_SYS_MMC_ENV_PART
int dev = mmc_get_env_dev();
blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
#endif
}
#ifdef CONFIG_CMD_SAVEENV
static inline int write_env(struct mmc *mmc, unsigned long size,
unsigned long offset, const void *buffer)
{
uint blk_start, blk_cnt, n;
struct blk_desc *desc = mmc_get_blk_desc(mmc);
blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
return (n == blk_cnt) ? 0 : -1;
}
int saveenv(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
int dev = mmc_get_env_dev();
struct mmc *mmc = find_mmc_device(dev);
u32 offset;
int ret, copy = 0;
const char *errmsg;
errmsg = init_mmc_for_env(mmc);
if (errmsg) {
printf("%s\n", errmsg);
return 1;
}
ret = env_export(env_new);
if (ret)
goto fini;
#ifdef CONFIG_ENV_OFFSET_REDUND
if (gd->env_valid == 1)
copy = 1;
#endif
if (mmc_get_env_addr(mmc, copy, &offset)) {
ret = 1;
goto fini;
}
printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
puts("failed\n");
ret = 1;
goto fini;
}
puts("done\n");
ret = 0;
#ifdef CONFIG_ENV_OFFSET_REDUND
gd->env_valid = gd->env_valid == 2 ? 1 : 2;
#endif
fini:
fini_mmc_for_env(mmc);
return ret;
}
#endif /* CONFIG_CMD_SAVEENV */
static inline int read_env(struct mmc *mmc, unsigned long size,
unsigned long offset, const void *buffer)
{
uint blk_start, blk_cnt, n;
struct blk_desc *desc = mmc_get_blk_desc(mmc);
blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
return (n == blk_cnt) ? 0 : -1;
}
#ifdef CONFIG_ENV_OFFSET_REDUND
void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
struct mmc *mmc;
u32 offset1, offset2;
int read1_fail = 0, read2_fail = 0;
int ret;
int dev = mmc_get_env_dev();
const char *errmsg = NULL;
ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
mmc = find_mmc_device(dev);
errmsg = init_mmc_for_env(mmc);
if (errmsg) {
ret = 1;
goto err;
}
if (mmc_get_env_addr(mmc, 0, &offset1) ||
mmc_get_env_addr(mmc, 1, &offset2)) {
ret = 1;
goto fini;
}
read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
if (read1_fail && read2_fail)
puts("*** Error - No Valid Environment Area found\n");
else if (read1_fail || read2_fail)
puts("*** Warning - some problems detected "
"reading environment; recovered successfully\n");
if (read1_fail && read2_fail) {
errmsg = "!bad CRC";
ret = 1;
goto fini;
} else if (!read1_fail && read2_fail) {
gd->env_valid = 1;
env_import((char *)tmp_env1, 1);
} else if (read1_fail && !read2_fail) {
gd->env_valid = 2;
env_import((char *)tmp_env2, 1);
} else {
env_import_redund((char *)tmp_env1, (char *)tmp_env2);
}
ret = 0;
fini:
fini_mmc_for_env(mmc);
err:
if (ret)
set_default_env(errmsg);
#endif
}
#else /* ! CONFIG_ENV_OFFSET_REDUND */
void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
struct mmc *mmc;
u32 offset;
int ret;
int dev = mmc_get_env_dev();
const char *errmsg;
mmc = find_mmc_device(dev);
errmsg = init_mmc_for_env(mmc);
if (errmsg) {
ret = 1;
goto err;
}
if (mmc_get_env_addr(mmc, 0, &offset)) {
ret = 1;
goto fini;
}
if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
errmsg = "!read failed";
ret = 1;
goto fini;
}
env_import(buf, 1);
ret = 0;
fini:
fini_mmc_for_env(mmc);
err:
if (ret)
set_default_env(errmsg);
#endif
}
#endif /* CONFIG_ENV_OFFSET_REDUND */