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u-boot/common/env_nand.c
Marcel Ziswiler 99c2b434d3 NAND: Fix warning due to missing env_ptr casts to u_char * in env_nand.c. 
The writeenv() and readenv() calls introduced by the recently added bad block
management for environment variables were missing casts therefore producing
compile time warnings.
While at it fixing some typo in a comment and indentation.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
2008-07-09 17:24:47 -05:00

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/*
* (C) Copyright 2008
* Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
*
* (C) Copyright 2004
* Jian Zhang, Texas Instruments, jzhang@ti.com.
* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/* #define DEBUG */
#include <common.h>
#if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <nand.h>
#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)
#define CMD_SAVEENV
#elif defined(CFG_ENV_OFFSET_REDUND)
#error Cannot use CFG_ENV_OFFSET_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_NAND
#endif
#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND != CFG_ENV_SIZE)
#error CFG_ENV_SIZE_REDUND should be the same as CFG_ENV_SIZE
#endif
#ifdef CONFIG_INFERNO
#error CONFIG_INFERNO not supported yet
#endif
#ifndef CFG_ENV_RANGE
#define CFG_ENV_RANGE CFG_ENV_SIZE
#endif
int nand_legacy_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf);
/* references to names in env_common.c */
extern uchar default_environment[];
extern int default_environment_size;
char * env_name_spec = "NAND";
#ifdef ENV_IS_EMBEDDED
extern uchar environment[];
env_t *env_ptr = (env_t *)(&environment[0]);
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr = 0;
#endif /* ENV_IS_EMBEDDED */
/* local functions */
#if !defined(ENV_IS_EMBEDDED)
static void use_default(void);
#endif
DECLARE_GLOBAL_DATA_PTR;
uchar env_get_char_spec (int index)
{
return ( *((uchar *)(gd->env_addr + index)) );
}
/* 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.
*/
int env_init(void)
{
#if defined(ENV_IS_EMBEDDED)
size_t total;
int crc1_ok = 0, crc2_ok = 0;
env_t *tmp_env1, *tmp_env2;
total = CFG_ENV_SIZE;
tmp_env1 = env_ptr;
tmp_env2 = (env_t *)((ulong)env_ptr + CFG_ENV_SIZE);
crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
if (!crc1_ok && !crc2_ok)
gd->env_valid = 0;
else if(crc1_ok && !crc2_ok)
gd->env_valid = 1;
else if(!crc1_ok && crc2_ok)
gd->env_valid = 2;
else {
/* both ok - check serial */
if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
gd->env_valid = 2;
else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
gd->env_valid = 1;
else if(tmp_env1->flags > tmp_env2->flags)
gd->env_valid = 1;
else if(tmp_env2->flags > tmp_env1->flags)
gd->env_valid = 2;
else /* flags are equal - almost impossible */
gd->env_valid = 1;
}
if (gd->env_valid == 1)
env_ptr = tmp_env1;
else if (gd->env_valid == 2)
env_ptr = tmp_env2;
#else /* ENV_IS_EMBEDDED */
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
#endif /* ENV_IS_EMBEDDED */
return (0);
}
#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.
*/
int writeenv(size_t offset, u_char *buf)
{
size_t end = offset + CFG_ENV_RANGE;
size_t amount_saved = 0;
size_t blocksize;
u_char *char_ptr;
blocksize = nand_info[0].erasesize;
while (amount_saved < CFG_ENV_SIZE && offset < end) {
if (nand_block_isbad(&nand_info[0], offset)) {
offset += blocksize;
} else {
char_ptr = &buf[amount_saved];
if (nand_write(&nand_info[0], offset, &blocksize,
char_ptr))
return 1;
offset += blocksize;
amount_saved += blocksize;
}
}
if (amount_saved != CFG_ENV_SIZE)
return 1;
return 0;
}
#ifdef CFG_ENV_OFFSET_REDUND
int saveenv(void)
{
size_t total;
int ret = 0;
nand_erase_options_t nand_erase_options;
env_ptr->flags++;
total = CFG_ENV_SIZE;
nand_erase_options.length = CFG_ENV_RANGE;
nand_erase_options.quiet = 0;
nand_erase_options.jffs2 = 0;
nand_erase_options.scrub = 0;
if (CFG_ENV_RANGE < CFG_ENV_SIZE)
return 1;
if(gd->env_valid == 1) {
puts ("Erasing redundant Nand...\n");
nand_erase_options.offset = CFG_ENV_OFFSET_REDUND;
if (nand_erase_opts(&nand_info[0], &nand_erase_options))
return 1;
puts ("Writing to redundant Nand... ");
ret = writeenv(CFG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
} else {
puts ("Erasing Nand...\n");
nand_erase_options.offset = CFG_ENV_OFFSET;
if (nand_erase_opts(&nand_info[0], &nand_erase_options))
return 1;
puts ("Writing to Nand... ");
ret = writeenv(CFG_ENV_OFFSET, (u_char *) env_ptr);
}
if (ret) {
puts("FAILED!\n");
return 1;
}
puts ("done\n");
gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
return ret;
}
#else /* ! CFG_ENV_OFFSET_REDUND */
int saveenv(void)
{
size_t total;
int ret = 0;
nand_erase_options_t nand_erase_options;
nand_erase_options.length = CFG_ENV_RANGE;
nand_erase_options.quiet = 0;
nand_erase_options.jffs2 = 0;
nand_erase_options.scrub = 0;
nand_erase_options.offset = CFG_ENV_OFFSET;
if (CFG_ENV_RANGE < CFG_ENV_SIZE)
return 1;
puts ("Erasing Nand...\n");
if (nand_erase_opts(&nand_info[0], &nand_erase_options))
return 1;
puts ("Writing to Nand... ");
total = CFG_ENV_SIZE;
if (writeenv(CFG_ENV_OFFSET, (u_char *) env_ptr)) {
puts("FAILED!\n");
return 1;
}
puts ("done\n");
return ret;
}
#endif /* CFG_ENV_OFFSET_REDUND */
#endif /* CMD_SAVEENV */
int readenv (size_t offset, u_char * buf)
{
size_t end = offset + CFG_ENV_RANGE;
size_t amount_loaded = 0;
size_t blocksize;
u_char *char_ptr;
blocksize = nand_info[0].erasesize;
while (amount_loaded < CFG_ENV_SIZE && offset < end) {
if (nand_block_isbad(&nand_info[0], offset)) {
offset += blocksize;
} else {
char_ptr = &buf[amount_loaded];
if (nand_read(&nand_info[0], offset, &blocksize, char_ptr))
return 1;
offset += blocksize;
amount_loaded += blocksize;
}
}
if (amount_loaded != CFG_ENV_SIZE)
return 1;
return 0;
}
#ifdef CFG_ENV_OFFSET_REDUND
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED)
size_t total;
int crc1_ok = 0, crc2_ok = 0;
env_t *tmp_env1, *tmp_env2;
total = CFG_ENV_SIZE;
tmp_env1 = (env_t *) malloc(CFG_ENV_SIZE);
tmp_env2 = (env_t *) malloc(CFG_ENV_SIZE);
if (readenv(CFG_ENV_OFFSET, (u_char *) tmp_env1))
puts("No Valid Environment Area Found\n");
if (readenv(CFG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
puts("No Valid Reundant Environment Area Found\n");
crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
if(!crc1_ok && !crc2_ok)
return use_default();
else if(crc1_ok && !crc2_ok)
gd->env_valid = 1;
else if(!crc1_ok && crc2_ok)
gd->env_valid = 2;
else {
/* both ok - check serial */
if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
gd->env_valid = 2;
else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
gd->env_valid = 1;
else if(tmp_env1->flags > tmp_env2->flags)
gd->env_valid = 1;
else if(tmp_env2->flags > tmp_env1->flags)
gd->env_valid = 2;
else /* flags are equal - almost impossible */
gd->env_valid = 1;
}
free(env_ptr);
if(gd->env_valid == 1) {
env_ptr = tmp_env1;
free(tmp_env2);
} else {
env_ptr = tmp_env2;
free(tmp_env1);
}
#endif /* ! ENV_IS_EMBEDDED */
}
#else /* ! CFG_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.
*/
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED)
size_t total;
int ret;
total = CFG_ENV_SIZE;
ret = readenv(CFG_ENV_OFFSET, (u_char *) env_ptr);
if (ret || total != CFG_ENV_SIZE)
return use_default();
if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
return use_default();
#endif /* ! ENV_IS_EMBEDDED */
}
#endif /* CFG_ENV_OFFSET_REDUND */
#if !defined(ENV_IS_EMBEDDED)
static void use_default()
{
puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
if (default_environment_size > CFG_ENV_SIZE){
puts ("*** Error - default environment is too large\n\n");
return;
}
memset (env_ptr, 0, sizeof(env_t));
memcpy (env_ptr->data,
default_environment,
default_environment_size);
env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
gd->env_valid = 1;
}
#endif
#endif /* CFG_ENV_IS_IN_NAND */
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