[J-u-boot.git] / common / env_nand.c

/*
 * (C) Copyright 2008
 * Stuart Wood, Lab X Technologies <[email protected]>
 *
 * (C) Copyright 2004
 * Jian Zhang, Texas Instruments, [email protected].

 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <[email protected]>

 * 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 will 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, 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, 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 */
Commit	Line	Data
13a5695b	1	/*
cc49cade SW	2	* (C) Copyright 2008
	3	* Stuart Wood, Lab X Technologies <[email protected]>
	4	*
13a5695b WD	5	* (C) Copyright 2004
	6	* Jian Zhang, Texas Instruments, [email protected].
	7
d12ae808	8	* (C) Copyright 2000-2006
13a5695b WD	9	* Wolfgang Denk, DENX Software Engineering, [email protected].
	10	*
	11	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	12	* Andreas Heppel <[email protected]>
	13
	14	* See file CREDITS for list of people who contributed to this
	15	* project.
	16	*
	17	* This program is free software; you can redistribute it and/or
	18	* modify it under the terms of the GNU General Public License as
	19	* published by the Free Software Foundation; either version 2 of
	20	* the License, or (at your option) any later version.
	21	*
	22	* This program is distributed in the hope that it will be useful,
	23	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	24	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	25	* GNU General Public License for more details.
	26	*
	27	* You should have received a copy of the GNU General Public License
	28	* along with this program; if not, write to the Free Software
	29	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	30	* MA 02111-1307 USA
	31	*/
	32
	33	/* #define DEBUG */
	34
	35	#include <common.h>
	36
	37	#if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */
	38
	39	#include <command.h>
	40	#include <environment.h>
	41	#include <linux/stddef.h>
e443c944	42	#include <malloc.h>
addb2e16	43	#include <nand.h>
13a5695b	44
c3517f91	45	#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)
13a5695b	46	#define CMD_SAVEENV
e443c944	47	#elif defined(CFG_ENV_OFFSET_REDUND)
90253178	48	#error Cannot use CFG_ENV_OFFSET_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_NAND
13a5695b WD	49	#endif
13a5695b WD	50
e443c944 MK	51	#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND != CFG_ENV_SIZE)
e443c944 MK	52	#error CFG_ENV_SIZE_REDUND should be the same as CFG_ENV_SIZE
13a5695b WD	53	#endif
13a5695b WD	54
13a5695b WD	55	#ifdef CONFIG_INFERNO
	56	#error CONFIG_INFERNO not supported yet
	57	#endif
	58
cc49cade SW	59	#ifndef CFG_ENV_RANGE
	60	#define CFG_ENV_RANGE CFG_ENV_SIZE
	61	#endif
	62
addb2e16	63	int nand_legacy_rw (struct nand_chip* nand, int cmd,
13a5695b WD	64	size_t start, size_t len,
13a5695b WD	65	size_t * retlen, u_char * buf);
addb2e16	66
13a5695b WD	67	/* references to names in env_common.c */
	68	extern uchar default_environment[];
	69	extern int default_environment_size;
	70
	71	char * env_name_spec = "NAND";
	72
	73
	74	#ifdef ENV_IS_EMBEDDED
	75	extern uchar environment[];
	76	env_t env_ptr = (env_t )(&environment[0]);
	77	#else /* ! ENV_IS_EMBEDDED */
49822e23	78	env_t *env_ptr = 0;
13a5695b WD	79	#endif /* ENV_IS_EMBEDDED */
	80
	81
	82	/* local functions */
d12ae808	83	#if !defined(ENV_IS_EMBEDDED)
13a5695b	84	static void use_default(void);
d12ae808	85	#endif
13a5695b	86
d87080b7	87	DECLARE_GLOBAL_DATA_PTR;
13a5695b WD	88
	89	uchar env_get_char_spec (int index)
	90	{
13a5695b WD	91	return ( ((uchar )(gd->env_addr + index)) );
	92	}
	93
	94
	95	/* this is called before nand_init()
	96	* so we can't read Nand to validate env data.
	97	* Mark it OK for now. env_relocate() in env_common.c
	98	* will call our relocate function which will does
	99	* the real validation.
d12ae808 SR	100	*
	101	* When using a NAND boot image (like sequoia_nand), the environment
	102	* can be embedded or attached to the U-Boot image in NAND flash. This way
	103	* the SPL loads not only the U-Boot image from NAND but also the
	104	* environment.
13a5695b WD	105	*/
	106	int env_init(void)
	107	{
d12ae808	108	#if defined(ENV_IS_EMBEDDED)
378e7ec9	109	size_t total;
d12ae808 SR	110	int crc1_ok = 0, crc2_ok = 0;
	111	env_t tmp_env1, tmp_env2;
	112
	113	total = CFG_ENV_SIZE;
	114
	115	tmp_env1 = env_ptr;
	116	tmp_env2 = (env_t *)((ulong)env_ptr + CFG_ENV_SIZE);
	117
	118	crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
	119	crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
	120
	121	if (!crc1_ok && !crc2_ok)
	122	gd->env_valid = 0;
	123	else if(crc1_ok && !crc2_ok)
	124	gd->env_valid = 1;
	125	else if(!crc1_ok && crc2_ok)
	126	gd->env_valid = 2;
	127	else {
	128	/* both ok - check serial */
	129	if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
	130	gd->env_valid = 2;
	131	else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
	132	gd->env_valid = 1;
	133	else if(tmp_env1->flags > tmp_env2->flags)
	134	gd->env_valid = 1;
	135	else if(tmp_env2->flags > tmp_env1->flags)
	136	gd->env_valid = 2;
	137	else /* flags are equal - almost impossible */
	138	gd->env_valid = 1;
	139	}
	140
	141	if (gd->env_valid == 1)
	142	env_ptr = tmp_env1;
	143	else if (gd->env_valid == 2)
	144	env_ptr = tmp_env2;
	145	#else /* ENV_IS_EMBEDDED */
e443c944	146	gd->env_addr = (ulong)&default_environment[0];
13a5695b	147	gd->env_valid = 1;
d12ae808	148	#endif /* ENV_IS_EMBEDDED */
13a5695b WD	149
	150	return (0);
	151	}
	152
	153	#ifdef CMD_SAVEENV
addb2e16 BS	154	/*
	155	* The legacy NAND code saved the environment in the first NAND device i.e.,
	156	* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
	157	*/
cc49cade SW	158	int writeenv(size_t offset, u_char *buf)
	159	{
	160	size_t end = offset + CFG_ENV_RANGE;
	161	size_t amount_saved = 0;
	162	size_t blocksize;
	163
	164	u_char *char_ptr;
	165
	166	blocksize = nand_info[0].erasesize;
	167
	168	while (amount_saved < CFG_ENV_SIZE && offset < end) {
	169	if (nand_block_isbad(&nand_info[0], offset)) {
	170	offset += blocksize;
	171	} else {
	172	char_ptr = &buf[amount_saved];
	173	if (nand_write(&nand_info[0], offset, &blocksize,
	174	char_ptr))
	175	return 1;
	176	offset += blocksize;
	177	amount_saved += blocksize;
	178	}
	179	}
	180	if (amount_saved != CFG_ENV_SIZE)
	181	return 1;
	182
	183	return 0;
	184	}
e443c944	185	#ifdef CFG_ENV_OFFSET_REDUND
13a5695b WD	186	int saveenv(void)
13a5695b WD	187	{
4ca79f47	188	size_t total;
2770bcb2	189	int ret = 0;
cc49cade	190	nand_erase_options_t nand_erase_options;
e443c944	191
e443c944 MK	192	env_ptr->flags++;
	193	total = CFG_ENV_SIZE;
	194
cc49cade SW	195	nand_erase_options.length = CFG_ENV_RANGE;
	196	nand_erase_options.quiet = 0;
	197	nand_erase_options.jffs2 = 0;
	198	nand_erase_options.scrub = 0;
	199
	200	if (CFG_ENV_RANGE < CFG_ENV_SIZE)
	201	return 1;
e443c944	202	if(gd->env_valid == 1) {
cc49cade SW	203	puts ("Erasing redundant Nand...\n");
	204	nand_erase_options.offset = CFG_ENV_OFFSET_REDUND;
	205	if (nand_erase_opts(&nand_info[0], &nand_erase_options))
e443c944	206	return 1;
cc49cade	207
e443c944	208	puts ("Writing to redundant Nand... ");
cc49cade	209	ret = writeenv(CFG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
e443c944	210	} else {
cc49cade SW	211	puts ("Erasing Nand...\n");
	212	nand_erase_options.offset = CFG_ENV_OFFSET;
	213	if (nand_erase_opts(&nand_info[0], &nand_erase_options))
e443c944 MK	214	return 1;
	215
	216	puts ("Writing to Nand... ");
cc49cade	217	ret = writeenv(CFG_ENV_OFFSET, (u_char *) env_ptr);
e443c944	218	}
cc49cade SW	219	if (ret) {
cc49cade SW	220	puts("FAILED!\n");
e443c944	221	return 1;
cc49cade	222	}
e443c944 MK	223
	224	puts ("done\n");
	225	gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
	226	return ret;
	227	}
	228	#else /* ! CFG_ENV_OFFSET_REDUND */
	229	int saveenv(void)
	230	{
378e7ec9	231	size_t total;
d52fb7e3	232	int ret = 0;
9e4006bc	233	nand_erase_options_t nand_erase_options;
e093a247	234
cc49cade SW	235	nand_erase_options.length = CFG_ENV_RANGE;
	236	nand_erase_options.quiet = 0;
	237	nand_erase_options.jffs2 = 0;
	238	nand_erase_options.scrub = 0;
	239	nand_erase_options.offset = CFG_ENV_OFFSET;
	240
	241	if (CFG_ENV_RANGE < CFG_ENV_SIZE)
	242	return 1;
	243	puts ("Erasing Nand...\n");
	244	if (nand_erase_opts(&nand_info[0], &nand_erase_options))
addb2e16	245	return 1;
13a5695b WD	246
13a5695b WD	247	puts ("Writing to Nand... ");
addb2e16	248	total = CFG_ENV_SIZE;
cc49cade SW	249	if (writeenv(CFG_ENV_OFFSET, env_ptr)) {
cc49cade SW	250	puts("FAILED!\n");
13a5695b	251	return 1;
cc49cade	252	}
13a5695b	253
addb2e16 BS	254	puts ("done\n");
addb2e16 BS	255	return ret;
13a5695b	256	}
e443c944	257	#endif /* CFG_ENV_OFFSET_REDUND */
13a5695b WD	258	#endif /* CMD_SAVEENV */
13a5695b WD	259
cc49cade SW	260	int readenv (size_t offset, u_char * buf)
	261	{
	262	size_t end = offset + CFG_ENV_RANGE;
	263	size_t amount_loaded = 0;
	264	size_t blocksize;
	265
	266	u_char *char_ptr;
	267
	268	blocksize = nand_info[0].erasesize;
	269
	270	while (amount_loaded < CFG_ENV_SIZE && offset < end) {
	271	if (nand_block_isbad(&nand_info[0], offset)) {
	272	offset += blocksize;
	273	} else {
	274	char_ptr = &buf[amount_loaded];
	275	if (nand_read(&nand_info[0], offset, &blocksize, char_ptr))
	276	return 1;
	277	offset += blocksize;
	278	amount_loaded += blocksize;
	279	}
	280	}
	281	if (amount_loaded != CFG_ENV_SIZE)
	282	return 1;
	283
	284	return 0;
	285	}
	286
e443c944 MK	287	#ifdef CFG_ENV_OFFSET_REDUND
	288	void env_relocate_spec (void)
	289	{
	290	#if !defined(ENV_IS_EMBEDDED)
f7b16a0a	291	size_t total;
2770bcb2	292	int crc1_ok = 0, crc2_ok = 0;
e443c944 MK	293	env_t tmp_env1, tmp_env2;
e443c944 MK	294
e443c944 MK	295	total = CFG_ENV_SIZE;
	296
	297	tmp_env1 = (env_t *) malloc(CFG_ENV_SIZE);
	298	tmp_env2 = (env_t *) malloc(CFG_ENV_SIZE);
	299
cc49cade SW	300	if (readenv(CFG_ENV_OFFSET, (u_char *) tmp_env1))
	301	puts("No Valid Environment Area Found\n");
	302	if (readenv(CFG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
	303	puts("No Valid Reundant Environment Area Found\n");
e443c944 MK	304
	305	crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
	306	crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
	307
	308	if(!crc1_ok && !crc2_ok)
	309	return use_default();
	310	else if(crc1_ok && !crc2_ok)
	311	gd->env_valid = 1;
	312	else if(!crc1_ok && crc2_ok)
	313	gd->env_valid = 2;
	314	else {
	315	/* both ok - check serial */
	316	if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
	317	gd->env_valid = 2;
	318	else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
	319	gd->env_valid = 1;
	320	else if(tmp_env1->flags > tmp_env2->flags)
	321	gd->env_valid = 1;
	322	else if(tmp_env2->flags > tmp_env1->flags)
	323	gd->env_valid = 2;
	324	else /* flags are equal - almost impossible */
	325	gd->env_valid = 1;
13a5695b	326
e443c944 MK	327	}
	328
	329	free(env_ptr);
	330	if(gd->env_valid == 1) {
	331	env_ptr = tmp_env1;
	332	free(tmp_env2);
	333	} else {
	334	env_ptr = tmp_env2;
	335	free(tmp_env1);
	336	}
	337
	338	#endif /* ! ENV_IS_EMBEDDED */
	339	}
	340	#else /* ! CFG_ENV_OFFSET_REDUND */
addb2e16 BS	341	/*
	342	* The legacy NAND code saved the environment in the first NAND device i.e.,
	343	* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
	344	*/
13a5695b WD	345	void env_relocate_spec (void)
	346	{
	347	#if !defined(ENV_IS_EMBEDDED)
378e7ec9	348	size_t total;
d52fb7e3	349	int ret;
13a5695b	350
addb2e16	351	total = CFG_ENV_SIZE;
cc49cade	352	ret = readenv(CFG_ENV_OFFSET, env_ptr);
53677ef1	353	if (ret \|\| total != CFG_ENV_SIZE)
13a5695b WD	354	return use_default();
	355
	356	if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
	357	return use_default();
	358	#endif /* ! ENV_IS_EMBEDDED */
13a5695b	359	}
e443c944	360	#endif /* CFG_ENV_OFFSET_REDUND */
13a5695b	361
d12ae808	362	#if !defined(ENV_IS_EMBEDDED)
13a5695b WD	363	static void use_default()
13a5695b WD	364	{
13a5695b WD	365	puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
13a5695b WD	366
e443c944	367	if (default_environment_size > CFG_ENV_SIZE){
13a5695b WD	368	puts ("*** Error - default environment is too large\n\n");
	369	return;
	370	}
	371
	372	memset (env_ptr, 0, sizeof(env_t));
	373	memcpy (env_ptr->data,
	374	default_environment,
	375	default_environment_size);
	376	env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
e443c944	377	gd->env_valid = 1;
13a5695b WD	378
13a5695b WD	379	}
d12ae808	380	#endif
13a5695b WD	381
13a5695b WD	382	#endif /* CFG_ENV_IS_IN_NAND */