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/*
* (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2008
* Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
*
* (C) Copyright 2004
* Jian Zhang, Texas Instruments, jzhang@ti.com.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <jffs2/jffs2.h>
#include <malloc.h>
#include <nand.h>
#include <search.h>
#include <errno.h>
#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
#define CMD_SAVEENV
#elif defined(CONFIG_ENV_OFFSET_REDUND)
#error CONFIG_ENV_OFFSET_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
#endif
#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
#ifndef CONFIG_ENV_RANGE
#define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
#endif
#ifndef CONFIG_STORE_COMPATIBLE
char *env_name_spec = "NAND";
#if defined(ENV_IS_EMBEDDED)
env_t *env_ptr = &environment;
#elif defined(CONFIG_NAND_ENV_DST)
env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr;
#endif /* ENV_IS_EMBEDDED */
#endif
DECLARE_GLOBAL_DATA_PTR;
/*
* This is called before nand_init() so we can't read NAND to
* validate env data.
*
* Mark it OK for now. env_relocate() in env_common.c will call our
* relocate function which does the real validation.
*
* When using a NAND boot image (like sequoia_nand), the environment
* can be embedded or attached to the U-Boot image in NAND flash.
* This way the SPL loads not only the U-Boot image from NAND but
* also the environment.
*/
#ifdef CONFIG_STORE_COMPATIBLE
int amlnand_env_int(void)
#else
int env_init(void)
#endif
{
#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
int crc1_ok = 0, crc2_ok = 0;
env_t *tmp_env1;
#ifdef CONFIG_ENV_OFFSET_REDUND
env_t *tmp_env2;
tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
#endif
tmp_env1 = env_ptr;
crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
if (!crc1_ok && !crc2_ok) {
gd->env_addr = 0;
gd->env_valid = ENV_INVALID;
return 0;
} else if (crc1_ok && !crc2_ok) {
gd->env_valid = ENV_VALID;
}
#ifdef CONFIG_ENV_OFFSET_REDUND
else if (!crc1_ok && crc2_ok) {
gd->env_valid = ENV_REDUND;
} else {
/* both ok - check serial */
if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
gd->env_valid = ENV_REDUND;
else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
gd->env_valid = ENV_VALID;
else if (tmp_env1->flags > tmp_env2->flags)
gd->env_valid = ENV_VALID;
else if (tmp_env2->flags > tmp_env1->flags)
gd->env_valid = ENV_REDUND;
else /* flags are equal - almost impossible */
gd->env_valid = ENV_VALID;
}
if (gd->env_valid == ENV_REDUND)
env_ptr = tmp_env2;
else
#endif
if (gd->env_valid == ENV_VALID)
env_ptr = tmp_env1;
gd->env_addr = (ulong)env_ptr->data;
#else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = ENV_VALID;
#endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
return 0;
}
static int env_nand_lookup(const char *partname,
nand_info_t **nand,
struct part_info **part)
{
#ifdef CONFIG_CMD_MTDPARTS
struct mtd_device *dev;
int ret;
u8 pnum;
ret = mtdparts_init();
if (ret) {
error("Cannot initialize MTD partitions\n");
return ret;
}
ret = find_dev_and_part(partname, &dev, &pnum, part);
if (ret) {
error("cannot find partition: '%s'", partname);
return ret;
}
#ifndef CONFIFG_AML_MTDPART
if (dev->id->type != MTD_DEV_TYPE_NAND) {
error("partition '%s' is not stored on a NAND device",
partname);
return -EINVAL;
}
*nand = get_nand_dev_by_index(dev->id->num);
#else
*nand = get_nand_dev_by_index(1);
#endif
return 0;
#else
error("%s,\n");
return -1;
#endif
}
#ifdef CMD_SAVEENV
/*
* The legacy NAND code saved the environment in the first NAND device i.e.,
* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
*/
static int writeenv(size_t offset, u_char *buf)
{
size_t end = offset + CONFIG_ENV_RANGE;
size_t amount_saved = 0;
size_t blocksize, len;
u_char *char_ptr;
blocksize = nand_info[1].erasesize;
len = min(blocksize, (size_t)CONFIG_ENV_SIZE);
while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
if (nand_block_isbad(&nand_info[1], offset)) {
offset += blocksize;
} else {
char_ptr = &buf[amount_saved];
if (nand_write(&nand_info[1], offset, &len, char_ptr))
return 1;
offset += blocksize;
amount_saved += len;
}
}
if (amount_saved != CONFIG_ENV_SIZE)
return 1;
return 0;
}
struct env_location {
char *name;
nand_erase_options_t erase_opts;
};
static struct env_location location_table[] = {
{
.name = "NAND",
.erase_opts = {
.length = CONFIG_ENV_RANGE,
.offset = CONFIG_ENV_OFFSET,
},
},
#ifdef CONFIG_ENV_OFFSET_REDUND
{
.name = "redundant NAND",
.erase_opts = {
.length = CONFIG_ENV_RANGE,
.offset = CONFIG_ENV_OFFSET + CONFIG_ENV_RANGE,
},
},
#endif
};
static int erase_and_write_env(const struct env_location *location,
u_char *env_new)
{
int ret = 0;
printf("Erasing %s...\n", location->name);
if (nand_erase_opts(&nand_info[1], &location->erase_opts))
return 1;
printf("Writing to %s... ", location->name);
ret = writeenv(location->erase_opts.offset, env_new);
puts(ret ? "FAILED!\n" : "OK\n");
return ret;
}
#ifdef CONFIG_ENV_OFFSET_REDUND
static unsigned char env_flags;
#endif
#ifdef CONFIG_STORE_COMPATIBLE
int amlnand_saveenv(void)
#else
int saveenv(void)
#endif
{
int ret = 0;
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
int env_idx = 0;
const char *name = "environment";
struct part_info *part;
nand_info_t *nand = NULL;
ret = env_nand_lookup(name, &nand, &part);
if (ret) {
printf("Error: can't find env part! %s %d",
__func__, __LINE__);
return ret;
}
if (location_table[0].erase_opts.offset ==
CONFIG_ENV_OFFSET)
location_table[0].erase_opts.offset =
part->offset;
#ifdef CONFIG_ENV_OFFSET_REDUND
if (location_table[1].erase_opts.offset ==
CONFIG_ENV_OFFSET + CONFIG_ENV_RANGE)
location_table[1].erase_opts.offset =
part->offset + CONFIG_ENV_RANGE;
#endif
if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
return 1;
ret = env_export(env_new);
if (ret)
return ret;
#ifdef CONFIG_ENV_OFFSET_REDUND
env_new->flags = ++env_flags; /* increase the serial */
env_idx = (gd->env_valid == ENV_VALID);
#endif
ret = erase_and_write_env(&location_table[env_idx], (u_char *)env_new);
#ifdef CONFIG_ENV_OFFSET_REDUND
if (!ret) {
/* preset other copy for next write */
gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID :
ENV_REDUND;
return ret;
}
env_idx = (env_idx + 1) & 1;
ret = erase_and_write_env(&location_table[env_idx], (u_char *)env_new);
if (!ret)
printf("Warning: primary env write failed,"
" redundancy is lost!\n");
#endif
return ret;
}
#endif /* CMD_SAVEENV */
static int readenv(size_t offset, u_char *buf)
{
size_t end = offset + CONFIG_ENV_RANGE;
size_t amount_loaded = 0;
size_t blocksize, len;
u_char *char_ptr;
blocksize = nand_info[1].erasesize;
if (!blocksize)
return 1;
len = min(blocksize, (size_t)CONFIG_ENV_SIZE);
while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
if (nand_block_isbad(&nand_info[1], offset)) {
offset += blocksize;
} else {
char_ptr = &buf[amount_loaded];
if (nand_read_skip_bad(&nand_info[1], offset,
&len, NULL,
nand_info[1].size, char_ptr))
return 1;
offset += blocksize;
amount_loaded += len;
}
}
if (amount_loaded != CONFIG_ENV_SIZE)
return 1;
return 0;
}
#ifdef CONFIG_ENV_OFFSET_OOB
int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
{
struct mtd_oob_ops ops;
uint32_t oob_buf[ENV_OFFSET_SIZE / sizeof(uint32_t)];
int ret;
ops.datbuf = NULL;
ops.mode = MTD_OOB_AUTO;
ops.ooboffs = 0;
ops.ooblen = ENV_OFFSET_SIZE;
ops.oobbuf = (void *)oob_buf;
ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
if (ret) {
printf("error reading OOB block 0\n");
return ret;
}
if (oob_buf[0] == ENV_OOB_MARKER) {
*result = oob_buf[1] * nand->erasesize;
} else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
*result = oob_buf[1];
} else {
printf("No dynamic environment marker in OOB block 0\n");
return -ENOENT;
}
return 0;
}
#endif
#ifdef CONFIG_ENV_OFFSET_REDUND
#ifdef CONFIG_STORE_COMPATIBLE
void amlnand_env_relocate_spec(void)
#else
void env_relocate_spec(void)
#endif
{
#if defined(ENV_IS_EMBEDDED)
return;
#else
int read1_fail = 0, read2_fail = 0;
int crc1_ok = 0, crc2_ok = 0;
int ret = 0;
env_t *ep, *tmp_env1, *tmp_env2;
const char *name = "environment";
struct part_info *part;
nand_info_t *nand = NULL;
ret = env_nand_lookup(name, &nand, &part);
if (ret) {
printf("Error: can't find env part! %s %d",
__func__, __LINE__);
return;
}
if (location_table[0].erase_opts.offset ==
CONFIG_ENV_OFFSET)
location_table[0].erase_opts.offset =
part->offset;
#ifdef CONFIG_ENV_OFFSET_REDUND
if (location_table[1].erase_opts.offset ==
CONFIG_ENV_OFFSET + CONFIG_ENV_RANGE)
location_table[1].erase_opts.offset =
part->offset + CONFIG_ENV_RANGE;
#endif
tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
if (tmp_env1 == NULL || tmp_env2 == NULL) {
puts("Can't allocate buffers for environment\n");
set_default_env("!malloc() failed");
goto done;
}
read1_fail = readenv(part->offset, (u_char *)tmp_env1);
read2_fail = readenv(part->offset + CONFIG_ENV_RANGE,
(u_char *)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");
crc1_ok = !read1_fail &&
(crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
crc2_ok = !read2_fail &&
(crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
if (!crc1_ok && !crc2_ok) {
/* we will save a default env into */
gd->env_valid = ENV_REDUND;
} else if (crc1_ok && !crc2_ok) {
gd->env_valid = ENV_VALID;
} else if (!crc1_ok && crc2_ok) {
gd->env_valid = ENV_REDUND;
} else {
/* both ok - check serial */
if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
gd->env_valid = ENV_REDUND;
else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
gd->env_valid = ENV_VALID;
else if (tmp_env1->flags > tmp_env2->flags)
gd->env_valid = ENV_VALID;
else if (tmp_env2->flags > tmp_env1->flags)
gd->env_valid = ENV_REDUND;
else /* flags are equal - almost impossible */
gd->env_valid = ENV_VALID;
}
free(env_ptr);
if (gd->env_valid == ENV_VALID)
ep = tmp_env1;
else
ep = tmp_env2;
env_flags = ep->flags;
env_import((char *)ep, 1);
done:
free(tmp_env1);
free(tmp_env2);
#endif /* ! ENV_IS_EMBEDDED */
}
#else /* ! CONFIG_ENV_OFFSET_REDUND */
/*
* The legacy NAND code saved the environment in the first NAND
* device i.e., nand_dev_desc + 0. This is also the behaviour using
* the new NAND code.
*/
#ifdef CONFIG_STORE_COMPATIBLE
void amlnand_env_relocate_spec(void)
#else
void env_relocate_spec(void)
#endif
{
#if !defined(ENV_IS_EMBEDDED)
int ret;
const char *name = "environment";
struct part_info *part;
nand_info_t *nand = NULL;
ret = env_nand_lookup(name, &nand, &part);
if (ret) {
printf("Error: can't find env part! %s %d",
__func__, __LINE__);
return;
}
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
if (location_table[0].erase_opts.offset ==
CONFIG_ENV_OFFSET)
location_table[0].erase_opts.offset =
part->offset;
#ifdef CONFIG_ENV_OFFSET_REDUND
if (location_table[1].erase_opts.offset ==
CONFIG_ENV_OFFSET + CONFIG_ENV_RANGE)
location_table[1].erase_opts.offset =
part->offset + CONFIG_ENV_RANGE;
#endif
#if defined(CONFIG_ENV_OFFSET_OOB)
ret = get_nand_env_oob(&nand_info[1], &nand_env_oob_offset);
/*
* If unable to read environment offset from NAND OOB then fall through
* to the normal environment reading code below
*/
if (!ret) {
printf("Found Environment offset in OOB..\n");
} else {
set_default_env("!no env offset in OOB");
return;
}
#endif
ret = readenv(part->offset, (u_char *)buf);
if (ret) {
set_default_env("!readenv() failed");
return;
}
env_import(buf, 1);
#endif /* ! ENV_IS_EMBEDDED */
}
#endif /* CONFIG_ENV_OFFSET_REDUND */