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

/*
 * (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>
 *
 * 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>
#include <command.h>
#include <environment.h>
#include <linux/stddef.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 Cannot use CONFIG_ENV_OFFSET_REDUND without 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

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 = 0;
#endif /* ENV_IS_EMBEDDED */

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) || 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 = 0;

		return 0;
	} else if (crc1_ok && !crc2_ok) {
		gd->env_valid = 1;
	}
#ifdef CONFIG_ENV_OFFSET_REDUND
	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 == 2)
		env_ptr = tmp_env2;
	else
#endif
	if (gd->env_valid == 1)
		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 = 1;
#endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */

	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 + CONFIG_ENV_RANGE;
	size_t amount_saved = 0;
	size_t blocksize, len;

	u_char *char_ptr;

	blocksize = nand_info[0].erasesize;
	len = min(blocksize, CONFIG_ENV_SIZE);

	while (amount_saved < CONFIG_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, &len,
					char_ptr))
				return 1;
			offset += blocksize;
			amount_saved += len;
		}
	}
	if (amount_saved != CONFIG_ENV_SIZE)
		return 1;

	return 0;
}

#ifdef CONFIG_ENV_OFFSET_REDUND
static unsigned char env_flags;

int saveenv(void)
{
	env_t	env_new;
	ssize_t	len;
	char	*res;
	int	ret = 0;
	nand_erase_options_t nand_erase_options;

	memset(&nand_erase_options, 0, sizeof(nand_erase_options));
	nand_erase_options.length = CONFIG_ENV_RANGE;

	if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
		return 1;

	res = (char *)&env_new.data;
	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
	if (len < 0) {
		error("Cannot export environment: errno = %d\n", errno);
		return 1;
	}
	env_new.crc   = crc32(0, env_new.data, ENV_SIZE);
	env_new.flags = ++env_flags; /* increase the serial */

	if(gd->env_valid == 1) {
		puts("Erasing redundant NAND...\n");
		nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
		if (nand_erase_opts(&nand_info[0], &nand_erase_options))
			return 1;

		puts("Writing to redundant NAND... ");
		ret = writeenv(CONFIG_ENV_OFFSET_REDUND,
			(u_char *)&env_new);
	} else {
		puts("Erasing NAND...\n");
		nand_erase_options.offset = CONFIG_ENV_OFFSET;
		if (nand_erase_opts(&nand_info[0], &nand_erase_options))
			return 1;

		puts("Writing to NAND... ");
		ret = writeenv(CONFIG_ENV_OFFSET,
			(u_char *)&env_new);
	}
	if (ret) {
		puts("FAILED!\n");
		return 1;
	}

	puts("done\n");

	gd->env_valid = (gd->env_valid == 2 ? 1 : 2);

	return ret;
}
#else /* ! CONFIG_ENV_OFFSET_REDUND */
int saveenv(void)
{
	int ret = 0;
	env_t	env_new;
	ssize_t	len;
	char	*res;
	nand_erase_options_t nand_erase_options;

	memset(&nand_erase_options, 0, sizeof(nand_erase_options));
	nand_erase_options.length = CONFIG_ENV_RANGE;
	nand_erase_options.offset = CONFIG_ENV_OFFSET;

	if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
		return 1;

	res = (char *)&env_new.data;
	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
	if (len < 0) {
		error("Cannot export environment: errno = %d\n", errno);
		return 1;
	}
	env_new.crc   = crc32(0, env_new.data, ENV_SIZE);

	puts("Erasing Nand...\n");
	if (nand_erase_opts(&nand_info[0], &nand_erase_options))
		return 1;

	puts("Writing to Nand... ");
	if (writeenv(CONFIG_ENV_OFFSET, (u_char *)&env_new)) {
		puts("FAILED!\n");
		return 1;
	}

	puts("done\n");
	return ret;
}
#endif /* CONFIG_ENV_OFFSET_REDUND */
#endif /* CMD_SAVEENV */

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[0].erasesize;
	if (!blocksize)
		return 1;
	len = min(blocksize, CONFIG_ENV_SIZE);

	while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
		if (nand_block_isbad(&nand_info[0], offset)) {
			offset += blocksize;
		} else {
			char_ptr = &buf[amount_loaded];
			if (nand_read_skip_bad(&nand_info[0], offset, &len, 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
void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
	int crc1_ok = 0, crc2_ok = 0;
	env_t *ep, *tmp_env1, *tmp_env2;

	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");
		free(tmp_env1);
		free(tmp_env2);
		set_default_env("!malloc() failed");
		return;
	}

	if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
		puts("No Valid Environment Area found\n");

	if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
		puts("No Valid Redundant 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) {
		free(tmp_env1);
		free(tmp_env2);
		set_default_env("!bad CRC");
		return;
	} 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)
		ep = tmp_env1;
	else
		ep = tmp_env2;

	env_flags = ep->flags;
	env_import((char *)ep, 0);

	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.
 */
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED)
	int ret;
	char buf[CONFIG_ENV_SIZE];

#if defined(CONFIG_ENV_OFFSET_OOB)
	ret = get_nand_env_oob(&nand_info[0], &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(CONFIG_ENV_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 */
Commit	Line	Data
13a5695b	1	/*
ea882baf WD	2	* (C) Copyright 2000-2010
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
cc49cade SW	5	* (C) Copyright 2008
	6	* Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
	7	*
13a5695b WD	8	* (C) Copyright 2004
13a5695b WD	9	* Jian Zhang, Texas Instruments, jzhang@ti.com.
13a5695b WD	10	*
	11	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	12	* Andreas Heppel <aheppel@sysgo.de>
ea882baf	13	*
13a5695b WD	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
ea882baf	33	#define DEBUG
13a5695b WD	34
13a5695b WD	35	#include <common.h>
13a5695b WD	36	#include <command.h>
	37	#include <environment.h>
	38	#include <linux/stddef.h>
e443c944	39	#include <malloc.h>
addb2e16	40	#include <nand.h>
ea882baf WD	41	#include <search.h>
ea882baf WD	42	#include <errno.h>
13a5695b	43
bdab39d3	44	#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
13a5695b	45	#define CMD_SAVEENV
0e8d1586	46	#elif defined(CONFIG_ENV_OFFSET_REDUND)
bdab39d3	47	#error Cannot use CONFIG_ENV_OFFSET_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
13a5695b WD	48	#endif
13a5695b WD	49
0e8d1586 JCPV	50	#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
0e8d1586 JCPV	51	#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
13a5695b WD	52	#endif
13a5695b WD	53
0e8d1586 JCPV	54	#ifndef CONFIG_ENV_RANGE
0e8d1586 JCPV	55	#define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
cc49cade SW	56	#endif
cc49cade SW	57
ea882baf	58	char *env_name_spec = "NAND";
13a5695b WD	59
13a5695b WD	60
b74ab737	61	#if defined(ENV_IS_EMBEDDED)
994bc671	62	env_t *env_ptr = &environment;
b74ab737 GL	63	#elif defined(CONFIG_NAND_ENV_DST)
b74ab737 GL	64	env_t env_ptr = (env_t )CONFIG_NAND_ENV_DST;
13a5695b	65	#else /* ! ENV_IS_EMBEDDED */
49822e23	66	env_t *env_ptr = 0;
13a5695b WD	67	#endif /* ENV_IS_EMBEDDED */
13a5695b WD	68
d87080b7	69	DECLARE_GLOBAL_DATA_PTR;
13a5695b WD	70
	71	uchar env_get_char_spec (int index)
	72	{
13a5695b WD	73	return ( ((uchar )(gd->env_addr + index)) );
	74	}
	75
ea882baf WD	76	/*
	77	* This is called before nand_init() so we can't read NAND to
	78	* validate env data.
	79	*
	80	* Mark it OK for now. env_relocate() in env_common.c will call our
	81	* relocate function which does the real validation.
d12ae808 SR	82	*
d12ae808 SR	83	* When using a NAND boot image (like sequoia_nand), the environment
ea882baf WD	84	* can be embedded or attached to the U-Boot image in NAND flash.
	85	* This way the SPL loads not only the U-Boot image from NAND but
	86	* also the environment.
13a5695b WD	87	*/
	88	int env_init(void)
	89	{
b74ab737	90	#if defined(ENV_IS_EMBEDDED) \|\| defined(CONFIG_NAND_ENV_DST)
d12ae808	91	int crc1_ok = 0, crc2_ok = 0;
b74ab737 GL	92	env_t *tmp_env1;
	93
	94	#ifdef CONFIG_ENV_OFFSET_REDUND
	95	env_t *tmp_env2;
d12ae808	96
0e8d1586	97	tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
b74ab737 GL	98	crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
	99	#endif
	100
	101	tmp_env1 = env_ptr;
d12ae808 SR	102
d12ae808 SR	103	crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
d12ae808	104
b74ab737 GL	105	if (!crc1_ok && !crc2_ok) {
b74ab737 GL	106	gd->env_addr = 0;
d12ae808	107	gd->env_valid = 0;
b74ab737 GL	108
	109	return 0;
	110	} else if (crc1_ok && !crc2_ok) {
d12ae808	111	gd->env_valid = 1;
b74ab737 GL	112	}
	113	#ifdef CONFIG_ENV_OFFSET_REDUND
	114	else if (!crc1_ok && crc2_ok) {
d12ae808	115	gd->env_valid = 2;
b74ab737	116	} else {
d12ae808 SR	117	/* both ok - check serial */
	118	if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
	119	gd->env_valid = 2;
	120	else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
	121	gd->env_valid = 1;
	122	else if(tmp_env1->flags > tmp_env2->flags)
	123	gd->env_valid = 1;
	124	else if(tmp_env2->flags > tmp_env1->flags)
	125	gd->env_valid = 2;
	126	else /* flags are equal - almost impossible */
	127	gd->env_valid = 1;
	128	}
	129
b74ab737 GL	130	if (gd->env_valid == 2)
	131	env_ptr = tmp_env2;
	132	else
	133	#endif
d12ae808 SR	134	if (gd->env_valid == 1)
d12ae808 SR	135	env_ptr = tmp_env1;
b74ab737 GL	136
	137	gd->env_addr = (ulong)env_ptr->data;
	138
	139	#else /* ENV_IS_EMBEDDED \|\| CONFIG_NAND_ENV_DST */
e443c944	140	gd->env_addr = (ulong)&default_environment[0];
13a5695b	141	gd->env_valid = 1;
b74ab737	142	#endif /* ENV_IS_EMBEDDED \|\| CONFIG_NAND_ENV_DST */
13a5695b WD	143
	144	return (0);
	145	}
	146
	147	#ifdef CMD_SAVEENV
addb2e16 BS	148	/*
	149	* The legacy NAND code saved the environment in the first NAND device i.e.,
	150	* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
	151	*/
cc49cade SW	152	int writeenv(size_t offset, u_char *buf)
cc49cade SW	153	{
0e8d1586	154	size_t end = offset + CONFIG_ENV_RANGE;
cc49cade	155	size_t amount_saved = 0;
c3db8c64	156	size_t blocksize, len;
cc49cade SW	157
	158	u_char *char_ptr;
	159
	160	blocksize = nand_info[0].erasesize;
0e8d1586	161	len = min(blocksize, CONFIG_ENV_SIZE);
cc49cade	162
0e8d1586	163	while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
cc49cade SW	164	if (nand_block_isbad(&nand_info[0], offset)) {
	165	offset += blocksize;
	166	} else {
	167	char_ptr = &buf[amount_saved];
c3db8c64	168	if (nand_write(&nand_info[0], offset, &len,
cc49cade SW	169	char_ptr))
	170	return 1;
	171	offset += blocksize;
c3db8c64	172	amount_saved += len;
cc49cade SW	173	}
cc49cade SW	174	}
0e8d1586	175	if (amount_saved != CONFIG_ENV_SIZE)
cc49cade SW	176	return 1;
	177
	178	return 0;
	179	}
eef1d719	180
0e8d1586	181	#ifdef CONFIG_ENV_OFFSET_REDUND
eef1d719 SW	182	static unsigned char env_flags;
eef1d719 SW	183
13a5695b WD	184	int saveenv(void)
13a5695b WD	185	{
ea882baf WD	186	env_t env_new;
	187	ssize_t len;
	188	char *res;
	189	int ret = 0;
cc49cade	190	nand_erase_options_t nand_erase_options;
e443c944	191
3b250ffb	192	memset(&nand_erase_options, 0, sizeof(nand_erase_options));
0e8d1586	193	nand_erase_options.length = CONFIG_ENV_RANGE;
cc49cade	194
0e8d1586	195	if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
cc49cade	196	return 1;
ea882baf WD	197
ea882baf WD	198	res = (char *)&env_new.data;
37f2fe74	199	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
ea882baf WD	200	if (len < 0) {
	201	error("Cannot export environment: errno = %d\n", errno);
	202	return 1;
	203	}
	204	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
eef1d719	205	env_new.flags = ++env_flags; /* increase the serial */
ea882baf	206
e443c944	207	if(gd->env_valid == 1) {
ea882baf	208	puts("Erasing redundant NAND...\n");
0e8d1586	209	nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
cc49cade	210	if (nand_erase_opts(&nand_info[0], &nand_erase_options))
e443c944	211	return 1;
cc49cade	212
ea882baf WD	213	puts("Writing to redundant NAND... ");
	214	ret = writeenv(CONFIG_ENV_OFFSET_REDUND,
	215	(u_char *)&env_new);
e443c944	216	} else {
ea882baf	217	puts("Erasing NAND...\n");
0e8d1586	218	nand_erase_options.offset = CONFIG_ENV_OFFSET;
cc49cade	219	if (nand_erase_opts(&nand_info[0], &nand_erase_options))
e443c944 MK	220	return 1;
e443c944 MK	221
ea882baf WD	222	puts("Writing to NAND... ");
	223	ret = writeenv(CONFIG_ENV_OFFSET,
	224	(u_char *)&env_new);
e443c944	225	}
cc49cade SW	226	if (ret) {
cc49cade SW	227	puts("FAILED!\n");
e443c944	228	return 1;
cc49cade	229	}
e443c944	230
ea882baf WD	231	puts("done\n");
ea882baf WD	232
e443c944	233	gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
ea882baf	234
e443c944 MK	235	return ret;
e443c944 MK	236	}
0e8d1586	237	#else /* ! CONFIG_ENV_OFFSET_REDUND */
e443c944 MK	238	int saveenv(void)
e443c944 MK	239	{
d52fb7e3	240	int ret = 0;
ea882baf WD	241	env_t env_new;
	242	ssize_t len;
	243	char *res;
9e4006bc	244	nand_erase_options_t nand_erase_options;
e093a247	245
3b250ffb	246	memset(&nand_erase_options, 0, sizeof(nand_erase_options));
0e8d1586	247	nand_erase_options.length = CONFIG_ENV_RANGE;
0e8d1586	248	nand_erase_options.offset = CONFIG_ENV_OFFSET;
cc49cade	249
0e8d1586	250	if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
cc49cade	251	return 1;
ea882baf WD	252
ea882baf WD	253	res = (char *)&env_new.data;
37f2fe74	254	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
ea882baf WD	255	if (len < 0) {
	256	error("Cannot export environment: errno = %d\n", errno);
	257	return 1;
	258	}
	259	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
	260
	261	puts("Erasing Nand...\n");
cc49cade	262	if (nand_erase_opts(&nand_info[0], &nand_erase_options))
addb2e16	263	return 1;
13a5695b	264
ea882baf WD	265	puts("Writing to Nand... ");
ea882baf WD	266	if (writeenv(CONFIG_ENV_OFFSET, (u_char *)&env_new)) {
cc49cade	267	puts("FAILED!\n");
13a5695b	268	return 1;
cc49cade	269	}
13a5695b	270
ea882baf	271	puts("done\n");
addb2e16	272	return ret;
13a5695b	273	}
0e8d1586	274	#endif /* CONFIG_ENV_OFFSET_REDUND */
13a5695b WD	275	#endif /* CMD_SAVEENV */
13a5695b WD	276
ea882baf	277	int readenv(size_t offset, u_char * buf)
cc49cade	278	{
0e8d1586	279	size_t end = offset + CONFIG_ENV_RANGE;
cc49cade	280	size_t amount_loaded = 0;
c3db8c64	281	size_t blocksize, len;
cc49cade SW	282
	283	u_char *char_ptr;
	284
	285	blocksize = nand_info[0].erasesize;
962ad59e MF	286	if (!blocksize)
962ad59e MF	287	return 1;
0e8d1586	288	len = min(blocksize, CONFIG_ENV_SIZE);
cc49cade	289
0e8d1586	290	while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
cc49cade SW	291	if (nand_block_isbad(&nand_info[0], offset)) {
	292	offset += blocksize;
	293	} else {
	294	char_ptr = &buf[amount_loaded];
068a208b	295	if (nand_read_skip_bad(&nand_info[0], offset, &len, char_ptr))
cc49cade SW	296	return 1;
cc49cade SW	297	offset += blocksize;
c3db8c64	298	amount_loaded += len;
cc49cade SW	299	}
cc49cade SW	300	}
0e8d1586	301	if (amount_loaded != CONFIG_ENV_SIZE)
cc49cade SW	302	return 1;
	303
	304	return 0;
	305	}
	306
c9f7351b BG	307	#ifdef CONFIG_ENV_OFFSET_OOB
	308	int get_nand_env_oob(nand_info_t nand, unsigned long result)
	309	{
	310	struct mtd_oob_ops ops;
	311	uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
	312	int ret;
	313
	314	ops.datbuf = NULL;
	315	ops.mode = MTD_OOB_AUTO;
	316	ops.ooboffs = 0;
	317	ops.ooblen = ENV_OFFSET_SIZE;
	318	ops.oobbuf = (void *) oob_buf;
	319
	320	ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
53504a27 SW	321	if (ret) {
	322	printf("error reading OOB block 0\n");
	323	return ret;
	324	}
c9f7351b	325
53504a27 SW	326	if (oob_buf[0] == ENV_OOB_MARKER) {
	327	result = oob_buf[1] nand->erasesize;
	328	} else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
	329	*result = oob_buf[1];
c9f7351b	330	} else {
53504a27 SW	331	printf("No dynamic environment marker in OOB block 0\n");
53504a27 SW	332	return -ENOENT;
c9f7351b	333	}
53504a27 SW	334
53504a27 SW	335	return 0;
c9f7351b BG	336	}
	337	#endif
	338
0e8d1586	339	#ifdef CONFIG_ENV_OFFSET_REDUND
ea882baf	340	void env_relocate_spec(void)
e443c944 MK	341	{
e443c944 MK	342	#if !defined(ENV_IS_EMBEDDED)
2770bcb2	343	int crc1_ok = 0, crc2_ok = 0;
ea882baf	344	env_t ep, tmp_env1, *tmp_env2;
e443c944	345
ea882baf WD	346	tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
ea882baf WD	347	tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
e443c944	348
15b86c3d WD	349	if ((tmp_env1 == NULL) \|\| (tmp_env2 == NULL)) {
15b86c3d WD	350	puts("Can't allocate buffers for environment\n");
ea882baf WD	351	free(tmp_env1);
	352	free(tmp_env2);
	353	set_default_env("!malloc() failed");
	354	return;
15b86c3d WD	355	}
15b86c3d WD	356
0e8d1586	357	if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
ea882baf WD	358	puts("No Valid Environment Area found\n");
ea882baf WD	359
0e8d1586	360	if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
ea882baf	361	puts("No Valid Redundant Environment Area found\n");
e443c944 MK	362
	363	crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
	364	crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
	365
ea882baf	366	if (!crc1_ok && !crc2_ok) {
5a9427dc	367	free(tmp_env1);
5a9427dc	368	free(tmp_env2);
ea882baf WD	369	set_default_env("!bad CRC");
	370	return;
	371	} else if (crc1_ok && !crc2_ok) {
e443c944	372	gd->env_valid = 1;
ea882baf	373	} else if (!crc1_ok && crc2_ok) {
e443c944	374	gd->env_valid = 2;
ea882baf	375	} else {
e443c944	376	/* both ok - check serial */
ea882baf	377	if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
e443c944	378	gd->env_valid = 2;
ea882baf	379	else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
e443c944	380	gd->env_valid = 1;
ea882baf	381	else if (tmp_env1->flags > tmp_env2->flags)
e443c944	382	gd->env_valid = 1;
ea882baf	383	else if (tmp_env2->flags > tmp_env1->flags)
e443c944 MK	384	gd->env_valid = 2;
	385	else /* flags are equal - almost impossible */
	386	gd->env_valid = 1;
13a5695b	387
e443c944 MK	388	}
	389
	390	free(env_ptr);
ea882baf WD	391
	392	if (gd->env_valid == 1)
	393	ep = tmp_env1;
	394	else
	395	ep = tmp_env2;
	396
eef1d719	397	env_flags = ep->flags;
ea882baf WD	398	env_import((char *)ep, 0);
	399
	400	free(tmp_env1);
	401	free(tmp_env2);
e443c944 MK	402
	403	#endif /* ! ENV_IS_EMBEDDED */
	404	}
0e8d1586	405	#else /* ! CONFIG_ENV_OFFSET_REDUND */
addb2e16	406	/*
ea882baf WD	407	* The legacy NAND code saved the environment in the first NAND
	408	* device i.e., nand_dev_desc + 0. This is also the behaviour using
	409	* the new NAND code.
addb2e16	410	*/
13a5695b WD	411	void env_relocate_spec (void)
	412	{
	413	#if !defined(ENV_IS_EMBEDDED)
d52fb7e3	414	int ret;
ea882baf	415	char buf[CONFIG_ENV_SIZE];
13a5695b	416
c9f7351b BG	417	#if defined(CONFIG_ENV_OFFSET_OOB)
c9f7351b BG	418	ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
ea882baf WD	419	/*
ea882baf WD	420	* If unable to read environment offset from NAND OOB then fall through
c9f7351b BG	421	* to the normal environment reading code below
c9f7351b BG	422	*/
ea882baf	423	if (!ret) {
c9f7351b	424	printf("Found Environment offset in OOB..\n");
ea882baf WD	425	} else {
	426	set_default_env("!no env offset in OOB");
	427	return;
	428	}
c9f7351b BG	429	#endif
c9f7351b BG	430
ea882baf WD	431	ret = readenv(CONFIG_ENV_OFFSET, (u_char *)buf);
	432	if (ret) {
	433	set_default_env("!readenv() failed");
	434	return;
	435	}
13a5695b	436
ea882baf	437	env_import(buf, 1);
13a5695b	438	#endif /* ! ENV_IS_EMBEDDED */
13a5695b	439	}
0e8d1586	440	#endif /* CONFIG_ENV_OFFSET_REDUND */