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r-link-uboot/common/env_nand.c

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/*
* (C) Copyright 2004
* Jian Zhang, Texas Instruments, jzhang@ti.com.
* (C) Copyright 2000-2004
* 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 ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_NAND)) == (CFG_CMD_ENV|CFG_CMD_NAND))
#define CMD_SAVEENV
#elif defined(CFG_ENV_OFFSET_REDUND)
#error Cannot use CFG_ENV_OFFSET_REDUND without CFG_CMD_ENV & CFG_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
int nand_legacy_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf);
/* info for NAND chips, defined in drivers/nand/nand.c */
extern nand_info_t nand_info[];
/* references to names in env_common.c */
extern uchar default_environment[];
extern int default_environment_size;
#ifdef ENV_IS_VARIABLE
char * nand_env_name_spec = "NAND";
extern env_t *env_ptr;
#else /* !ENV_IS_VARIABLE */
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 */
#endif /* ENV_IS_VARIABLE */
/* local functions */
static void use_default(void);
DECLARE_GLOBAL_DATA_PTR;
#ifdef ENV_IS_VARIABLE
uchar nand_env_get_char_spec (int index)
#else
uchar env_get_char_spec (int index)
#endif
{
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 will does
* the real validation.
*/
#ifdef ENV_IS_VARIABLE
int nand_env_init(void)
#else
int env_init(void)
#endif
{
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
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.
*/
#ifdef CFG_ENV_OFFSET_REDUND
#ifdef ENV_IS_VARIABLE
int nand_saveenv(void)
#else
int saveenv(void)
#endif
{
ulong total;
int ret = 0;
int quiet = 0;
const char *quiet_str = getenv("quiet");
nand_write_options_t w_opts;
nand_erase_options_t e_opts;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
env_ptr->flags++;
total = CFG_ENV_SIZE;
if(gd->env_valid == 1) {
puts ("Erasing redundant Nand...");
memset(&e_opts, 0, sizeof(e_opts));
e_opts.offset = CFG_ENV_OFFSET_REDUND;
e_opts.length = CFG_ENV_SIZE;
e_opts.jffs2 = 0;
e_opts.quiet = quiet;
if (nand_erase_opts(&nand_info[0], &e_opts))
return 1;
puts ("Writing to redundant Nand... ");
/* write */
memset(&w_opts, 0, sizeof(w_opts));
w_opts.buffer = (u_char*) env_ptr;
w_opts.length = total;
w_opts.offset = CFG_ENV_OFFSET_REDUND;
/* opts.forcejffs2 = 1; */
w_opts.pad = 0;
w_opts.blockalign = 1;
w_opts.quiet = quiet;
ret = nand_write_opts(&nand_info[0], &w_opts);
} else {
puts ("Erasing Nand...");
memset(&e_opts, 0, sizeof(e_opts));
e_opts.offset = CFG_ENV_OFFSET;
e_opts.length = CFG_ENV_SIZE;
e_opts.jffs2 = 0;
e_opts.quiet = quiet;
if (nand_erase_opts(&nand_info[0], &e_opts))
return 1;
puts ("Writing to Nand... ");
memset(&w_opts, 0, sizeof(w_opts));
w_opts.buffer = (u_char*) env_ptr;
w_opts.length = total;
w_opts.offset = CFG_ENV_OFFSET;
/* w_opts.forcejffs2 = 1; */
w_opts.pad = 0;
w_opts.blockalign = 1;
w_opts.quiet = quiet;
ret = nand_write_opts(&nand_info[0], &w_opts);
}
if (ret || total != CFG_ENV_SIZE)
return 1;
puts ("done\n");
gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
return ret;
}
#else /* ! CFG_ENV_OFFSET_REDUND */
#ifdef ENV_IS_VARIABLE
int nand_saveenv(void)
#else
int saveenv(void)
#endif
{
ulong total;
int ret = 0;
int quiet = 0;
const char *quiet_str = getenv("quiet");
nand_write_options_t w_opts;
nand_erase_options_t e_opts;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
puts ("Erasing Nand...");
memset(&e_opts, 0, sizeof(e_opts));
e_opts.offset = CFG_ENV_OFFSET;
e_opts.length = CFG_ENV_SIZE;
e_opts.jffs2 = 0;
e_opts.quiet = quiet;
if (nand_erase_opts(&nand_info[0], &e_opts))
return 1;
puts ("Writing to Nand... ");
total = CFG_ENV_SIZE;
memset(&w_opts, 0, sizeof(w_opts));
w_opts.buffer = (u_char*) env_ptr;
w_opts.length = total;
w_opts.offset = CFG_ENV_OFFSET;
/* w_opts.forcejffs2 = 1; */
w_opts.pad = 0;
w_opts.blockalign = 1;
w_opts.quiet = quiet;
ret = nand_write_opts(&nand_info[0], &w_opts);
puts ("done\n");
return ret;
}
#endif /* CFG_ENV_OFFSET_REDUND */
#endif /* CMD_SAVEENV */
#ifdef CFG_ENV_OFFSET_REDUND
#ifdef ENV_IS_VARIABLE
void nand_env_relocate_spec (void)
#else
void env_relocate_spec (void)
#endif
{
#if !defined(ENV_IS_EMBEDDED)
ulong total;
int crc1_ok = 0, crc2_ok = 0;
env_t *tmp_env1, *tmp_env2;
int quiet = 0;
const char *quiet_str = getenv("quiet");
nand_read_options_t r_opts;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
total = CFG_ENV_SIZE;
tmp_env1 = (env_t *) malloc(CFG_ENV_SIZE);
tmp_env2 = (env_t *) malloc(CFG_ENV_SIZE);
memset(&r_opts, 0, sizeof(r_opts));
r_opts.buffer = (u_char*) tmp_env1;
r_opts.length = total;
r_opts.offset = CFG_ENV_OFFSET;
r_opts.quiet = quiet;
nand_read_opts(&nand_info[0], &r_opts);
memset(&r_opts, 0, sizeof(r_opts));
r_opts.buffer = (u_char*) tmp_env2;
r_opts.length = total;
r_opts.offset = CFG_ENV_OFFSET_REDUND;
r_opts.quiet = quiet;
nand_read_opts(&nand_info[0], &r_opts);
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.
*/
#ifdef ENV_IS_VARIABLE
void nand_env_relocate_spec (void)
#else
void env_relocate_spec (void)
#endif
{
#if !defined(ENV_IS_EMBEDDED)
ulong total;
int ret;
const char *quiet_str = getenv("quiet");
int quiet = 0;
nand_read_options_t r_opts;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
total = CFG_ENV_SIZE;
memset(&r_opts, 0, sizeof(r_opts));
r_opts.buffer = (u_char*) env_ptr;
r_opts.length = total;
r_opts.offset = CFG_ENV_OFFSET;
r_opts.quiet = quiet;
ret = nand_read_opts(&nand_info[0], &r_opts);
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 */
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 /* CFG_ENV_IS_IN_NAND */
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