[people/ms/u-boot.git] / env / flash.c

/*
 * (C) Copyright 2000-2010
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <aheppel@sysgo.de>

 * SPDX-License-Identifier:	GPL-2.0+
 */

/* #define DEBUG */

#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <search.h>
#include <errno.h>

DECLARE_GLOBAL_DATA_PTR;

#ifndef CONFIG_SPL_BUILD
# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
#  define CMD_SAVEENV
# elif defined(CONFIG_ENV_ADDR_REDUND)
#  error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
# endif
#endif

#if defined(CONFIG_ENV_SIZE_REDUND) &&	\
	(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
#endif

/* TODO(sjg@chromium.org): Figure out all these special cases */
#if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
	!defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
	!defined(CONFIG_TARGET_EDMINIV2)) || \
	!defined(CONFIG_SPL_BUILD)
#define LOADENV
#endif

#if !defined(CONFIG_TARGET_X600) || !defined(CONFIG_SPL_BUILD)
#define INITENV
#endif

char *env_name_spec = "Flash";

#ifdef ENV_IS_EMBEDDED
env_t *env_ptr = &environment;

static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;

#else /* ! ENV_IS_EMBEDDED */

env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
#endif /* ENV_IS_EMBEDDED */

#if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
#endif

#ifdef CONFIG_ENV_ADDR_REDUND
static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;

/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
#endif /* CONFIG_ENV_ADDR_REDUND */


#ifdef CONFIG_ENV_ADDR_REDUND
#ifdef INITENV
int env_init(void)
{
	int crc1_ok = 0, crc2_ok = 0;

	uchar flag1 = flash_addr->flags;
	uchar flag2 = flash_addr_new->flags;

	ulong addr_default = (ulong)&default_environment[0];
	ulong addr1 = (ulong)&(flash_addr->data);
	ulong addr2 = (ulong)&(flash_addr_new->data);

	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	crc2_ok =
		crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;

	if (crc1_ok && !crc2_ok) {
		gd->env_addr	= addr1;
		gd->env_valid	= ENV_VALID;
	} else if (!crc1_ok && crc2_ok) {
		gd->env_addr	= addr2;
		gd->env_valid	= ENV_VALID;
	} else if (!crc1_ok && !crc2_ok) {
		gd->env_addr	= addr_default;
		gd->env_valid	= 0;
	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
		gd->env_addr	= addr1;
		gd->env_valid	= ENV_VALID;
	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
		gd->env_addr	= addr2;
		gd->env_valid	= ENV_VALID;
	} else if (flag1 == flag2) {
		gd->env_addr	= addr1;
		gd->env_valid	= ENV_REDUND;
	} else if (flag1 == 0xFF) {
		gd->env_addr	= addr1;
		gd->env_valid	= ENV_REDUND;
	} else if (flag2 == 0xFF) {
		gd->env_addr	= addr2;
		gd->env_valid	= ENV_REDUND;
	}

	return 0;
}
#endif

#ifdef CMD_SAVEENV
int saveenv(void)
{
	env_t	env_new;
	char	*saved_data = NULL;
	char	flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
	int	rc = 1;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	ulong	up_data = 0;
#endif

	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);

	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
		goto done;

	debug("Protect off %08lX ... %08lX\n",
		(ulong)flash_addr_new, end_addr_new);

	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
		goto done;

	rc = env_export(&env_new);
	if (rc)
		return rc;
	env_new.flags	= new_flag;

#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
	debug("Data to save 0x%lX\n", up_data);
	if (up_data) {
		saved_data = malloc(up_data);
		if (saved_data == NULL) {
			printf("Unable to save the rest of sector (%ld)\n",
				up_data);
			goto done;
		}
		memcpy(saved_data,
			(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
			up_data);
		debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
			(long)flash_addr_new + CONFIG_ENV_SIZE,
			up_data, saved_data);
	}
#endif
	puts("Erasing Flash...");
	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);

	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
		goto done;

	puts("Writing to Flash... ");
	debug(" %08lX ... %08lX ...",
		(ulong)&(flash_addr_new->data),
		sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
			 sizeof(env_new));
	if (rc)
		goto perror;

	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
			 sizeof(flash_addr->flags));
	if (rc)
		goto perror;

#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	if (up_data) { /* restore the rest of sector */
		debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
			(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
		if (flash_write(saved_data,
				(long)flash_addr_new + CONFIG_ENV_SIZE,
				up_data))
			goto perror;
	}
#endif
	puts("done\n");

	{
		env_t *etmp = flash_addr;
		ulong ltmp = end_addr;

		flash_addr = flash_addr_new;
		flash_addr_new = etmp;

		end_addr = end_addr_new;
		end_addr_new = ltmp;
	}

	rc = 0;
	goto done;
perror:
	flash_perror(rc);
done:
	if (saved_data)
		free(saved_data);
	/* try to re-protect */
	flash_sect_protect(1, (ulong)flash_addr, end_addr);
	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);

	return rc;
}
#endif /* CMD_SAVEENV */

#else /* ! CONFIG_ENV_ADDR_REDUND */

#ifdef INITENV
int env_init(void)
{
	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
		gd->env_addr	= (ulong)&(env_ptr->data);
		gd->env_valid	= ENV_VALID;
		return 0;
	}

	gd->env_addr	= (ulong)&default_environment[0];
	gd->env_valid	= 0;
	return 0;
}
#endif

#ifdef CMD_SAVEENV
int saveenv(void)
{
	env_t	env_new;
	int	rc = 1;
	char	*saved_data = NULL;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	ulong	up_data = 0;

	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
	debug("Data to save 0x%lx\n", up_data);
	if (up_data) {
		saved_data = malloc(up_data);
		if (saved_data == NULL) {
			printf("Unable to save the rest of sector (%ld)\n",
				up_data);
			goto done;
		}
		memcpy(saved_data,
			(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
		debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
			(ulong)flash_addr + CONFIG_ENV_SIZE,
			up_data,
			(ulong)saved_data);
	}
#endif	/* CONFIG_ENV_SECT_SIZE */

	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);

	if (flash_sect_protect(0, (long)flash_addr, end_addr))
		goto done;

	rc = env_export(&env_new);
	if (rc)
		goto done;

	puts("Erasing Flash...");
	if (flash_sect_erase((long)flash_addr, end_addr))
		goto done;

	puts("Writing to Flash... ");
	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
	if (rc != 0)
		goto perror;

#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	if (up_data) {	/* restore the rest of sector */
		debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
			(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
		if (flash_write(saved_data,
				(long)flash_addr + CONFIG_ENV_SIZE,
				up_data))
			goto perror;
	}
#endif
	puts("done\n");
	rc = 0;
	goto done;
perror:
	flash_perror(rc);
done:
	if (saved_data)
		free(saved_data);
	/* try to re-protect */
	flash_sect_protect(1, (long)flash_addr, end_addr);
	return rc;
}
#endif /* CMD_SAVEENV */

#endif /* CONFIG_ENV_ADDR_REDUND */

void env_relocate_spec(void)
{
#ifdef CONFIG_ENV_ADDR_REDUND
	if (gd->env_addr != (ulong)&(flash_addr->data)) {
		env_t *etmp = flash_addr;
		ulong ltmp = end_addr;

		flash_addr = flash_addr_new;
		flash_addr_new = etmp;

		end_addr = end_addr_new;
		end_addr_new = ltmp;
	}

	if (flash_addr_new->flags != OBSOLETE_FLAG &&
	    crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
		char flag = OBSOLETE_FLAG;

		gd->env_valid = ENV_REDUND;
		flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
		flash_write(&flag,
			    (ulong)&(flash_addr_new->flags),
			    sizeof(flash_addr_new->flags));
		flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
	}

	if (flash_addr->flags != ACTIVE_FLAG &&
	    (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
		char flag = ACTIVE_FLAG;

		gd->env_valid = ENV_REDUND;
		flash_sect_protect(0, (ulong)flash_addr, end_addr);
		flash_write(&flag,
			    (ulong)&(flash_addr->flags),
			    sizeof(flash_addr->flags));
		flash_sect_protect(1, (ulong)flash_addr, end_addr);
	}

	if (gd->env_valid == ENV_REDUND)
		puts("*** Warning - some problems detected "
		     "reading environment; recovered successfully\n\n");
#endif /* CONFIG_ENV_ADDR_REDUND */

	env_import((char *)flash_addr, 1);
}

U_BOOT_ENV_LOCATION(flash) = {
	.location	= ENVL_FLASH,
#ifdef LOADENV
	.load		= env_relocate_spec,
#endif
#ifdef CMD_SAVEENV
	.save		= env_save_ptr(saveenv),
#endif
#ifdef INITENV
	.init		= env_init,
#endif
};
Commit	Line	Data
c609719b	1	/*
ea882baf	2	* (C) Copyright 2000-2010
c609719b WD	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	6	* Andreas Heppel <aheppel@sysgo.de>
	7
3765b3e7	8	* SPDX-License-Identifier: GPL-2.0+
c609719b WD	9	*/
	10
	11	/* #define DEBUG */
	12
	13	#include <common.h>
c609719b WD	14	#include <command.h>
c609719b WD	15	#include <environment.h>
c609719b	16	#include <linux/stddef.h>
47cd00fa	17	#include <malloc.h>
ea882baf WD	18	#include <search.h>
ea882baf WD	19	#include <errno.h>
c609719b	20
d87080b7 WD	21	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	22
4415f1d1 SG	23	#ifndef CONFIG_SPL_BUILD
	24	# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
	25	# define CMD_SAVEENV
	26	# elif defined(CONFIG_ENV_ADDR_REDUND)
	27	# error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
	28	# endif
c609719b WD	29	#endif
c609719b WD	30
82b54b97 IG	31	#if defined(CONFIG_ENV_SIZE_REDUND) && \
82b54b97 IG	32	(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
0e8d1586	33	#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
c609719b WD	34	#endif
c609719b WD	35
4415f1d1 SG	36	/* TODO(sjg@chromium.org): Figure out all these special cases */
	37	#if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
	38	!defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
	39	!defined(CONFIG_TARGET_EDMINIV2)) \|\| \
	40	!defined(CONFIG_SPL_BUILD)
	41	#define LOADENV
	42	#endif
	43
	44	#if !defined(CONFIG_TARGET_X600) \|\| !defined(CONFIG_SPL_BUILD)
	45	#define INITENV
	46	#endif
	47
82b54b97	48	char *env_name_spec = "Flash";
c609719b WD	49
c609719b WD	50	#ifdef ENV_IS_EMBEDDED
994bc671	51	env_t *env_ptr = &environment;
c609719b	52
0e8d1586	53	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	54
	55	#else /* ! ENV_IS_EMBEDDED */
	56
0e8d1586	57	env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
0e8d1586	58	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	59	#endif /* ENV_IS_EMBEDDED */
c609719b WD	60
ea882baf WD	61	#if defined(CMD_SAVEENV) \|\| defined(CONFIG_ENV_ADDR_REDUND)
	62	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
	63	static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
	64	#endif
	65
0e8d1586 JCPV	66	#ifdef CONFIG_ENV_ADDR_REDUND
0e8d1586 JCPV	67	static env_t flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	68
ea882baf	69	/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
0e8d1586	70	static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
0e8d1586	71	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	72
c609719b	73
0e8d1586	74	#ifdef CONFIG_ENV_ADDR_REDUND
4415f1d1	75	#ifdef INITENV
82b54b97	76	int env_init(void)
c609719b	77	{
8ed96046	78	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	79
	80	uchar flag1 = flash_addr->flags;
	81	uchar flag2 = flash_addr_new->flags;
	82
	83	ulong addr_default = (ulong)&default_environment[0];
	84	ulong addr1 = (ulong)&(flash_addr->data);
	85	ulong addr2 = (ulong)&(flash_addr_new->data);
	86
82b54b97 IG	87	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	88	crc2_ok =
	89	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
	90
	91	if (crc1_ok && !crc2_ok) {
	92	gd->env_addr = addr1;
203e94f6	93	gd->env_valid = ENV_VALID;
82b54b97 IG	94	} else if (!crc1_ok && crc2_ok) {
82b54b97 IG	95	gd->env_addr = addr2;
203e94f6	96	gd->env_valid = ENV_VALID;
82b54b97 IG	97	} else if (!crc1_ok && !crc2_ok) {
	98	gd->env_addr = addr_default;
	99	gd->env_valid = 0;
c3f9d493	100	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
82b54b97	101	gd->env_addr = addr1;
203e94f6	102	gd->env_valid = ENV_VALID;
c3f9d493	103	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
82b54b97	104	gd->env_addr = addr2;
203e94f6	105	gd->env_valid = ENV_VALID;
c3f9d493	106	} else if (flag1 == flag2) {
82b54b97	107	gd->env_addr = addr1;
203e94f6	108	gd->env_valid = ENV_REDUND;
c3f9d493	109	} else if (flag1 == 0xFF) {
82b54b97	110	gd->env_addr = addr1;
203e94f6	111	gd->env_valid = ENV_REDUND;
c3f9d493	112	} else if (flag2 == 0xFF) {
82b54b97	113	gd->env_addr = addr2;
203e94f6	114	gd->env_valid = ENV_REDUND;
c609719b WD	115	}
c609719b WD	116
ea882baf	117	return 0;
c609719b	118	}
4415f1d1	119	#endif
c609719b WD	120
	121	#ifdef CMD_SAVEENV
	122	int saveenv(void)
	123	{
ea882baf	124	env_t env_new;
7ce1526e	125	char *saved_data = NULL;
ea882baf	126	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
82b54b97	127	int rc = 1;
0e8d1586	128	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	129	ulong up_data = 0;
500545cc	130	#endif
c609719b	131
82b54b97	132	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	133
82b54b97	134	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
ea882baf	135	goto done;
c609719b	136
ea882baf	137	debug("Protect off %08lX ... %08lX\n",
c609719b WD	138	(ulong)flash_addr_new, end_addr_new);
c609719b WD	139
82b54b97	140	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
ea882baf	141	goto done;
ea882baf	142
7ce1526e MV	143	rc = env_export(&env_new);
	144	if (rc)
	145	return rc;
82b54b97	146	env_new.flags = new_flag;
c609719b	147
0e8d1586	148	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
82b54b97	149	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
ea882baf	150	debug("Data to save 0x%lX\n", up_data);
47cd00fa	151	if (up_data) {
82b54b97 IG	152	saved_data = malloc(up_data);
82b54b97 IG	153	if (saved_data == NULL) {
8bde7f77	154	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	155	up_data);
ea882baf	156	goto done;
47cd00fa	157	}
8bde7f77	158	memcpy(saved_data,
82b54b97 IG	159	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
82b54b97 IG	160	up_data);
ea882baf WD	161	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	162	(long)flash_addr_new + CONFIG_ENV_SIZE,
	163	up_data, saved_data);
47cd00fa WD	164	}
47cd00fa WD	165	#endif
ea882baf	166	puts("Erasing Flash...");
82b54b97	167	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
c609719b	168
82b54b97	169	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
ea882baf	170	goto done;
c609719b	171
ea882baf WD	172	puts("Writing to Flash... ");
ea882baf WD	173	debug(" %08lX ... %08lX ...",
c609719b	174	(ulong)&(flash_addr_new->data),
82b54b97 IG	175	sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	176	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
	177	sizeof(env_new));
	178	if (rc)
	179	goto perror;
	180
	181	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
	182	sizeof(flash_addr->flags));
	183	if (rc)
	184	goto perror;
c609719b	185
0e8d1586	186	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	187	if (up_data) { /* restore the rest of sector */
ea882baf WD	188	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	189	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	190	if (flash_write(saved_data,
0e8d1586	191	(long)flash_addr_new + CONFIG_ENV_SIZE,
82b54b97 IG	192	up_data))
82b54b97 IG	193	goto perror;
47cd00fa WD	194	}
47cd00fa WD	195	#endif
ea882baf WD	196	puts("done\n");
ea882baf WD	197
c609719b	198	{
82b54b97	199	env_t *etmp = flash_addr;
c609719b WD	200	ulong ltmp = end_addr;
	201
	202	flash_addr = flash_addr_new;
	203	flash_addr_new = etmp;
	204
	205	end_addr = end_addr_new;
	206	end_addr_new = ltmp;
	207	}
	208
	209	rc = 0;
82b54b97 IG	210	goto done;
	211	perror:
	212	flash_perror(rc);
ea882baf	213	done:
47cd00fa	214	if (saved_data)
ea882baf	215	free(saved_data);
c609719b	216	/* try to re-protect */
82b54b97 IG	217	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	218	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	219
	220	return rc;
	221	}
	222	#endif /* CMD_SAVEENV */
	223
0e8d1586	224	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	225
4415f1d1	226	#ifdef INITENV
82b54b97	227	int env_init(void)
c609719b	228	{
c609719b	229	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97	230	gd->env_addr = (ulong)&(env_ptr->data);
203e94f6	231	gd->env_valid = ENV_VALID;
82b54b97	232	return 0;
c609719b	233	}
9bb8b209	234
82b54b97 IG	235	gd->env_addr = (ulong)&default_environment[0];
82b54b97 IG	236	gd->env_valid = 0;
ea882baf	237	return 0;
c609719b	238	}
4415f1d1	239	#endif
c609719b WD	240
c609719b WD	241	#ifdef CMD_SAVEENV
c609719b WD	242	int saveenv(void)
c609719b WD	243	{
ea882baf	244	env_t env_new;
ea882baf	245	int rc = 1;
3fa1981e	246	char *saved_data = NULL;
ea882baf WD	247	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	248	ulong up_data = 0;
c609719b	249
82b54b97	250	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	251	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	252	if (up_data) {
82b54b97 IG	253	saved_data = malloc(up_data);
82b54b97 IG	254	if (saved_data == NULL) {
ea882baf WD	255	printf("Unable to save the rest of sector (%ld)\n",
	256	up_data);
	257	goto done;
	258	}
	259	memcpy(saved_data,
	260	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	261	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	262	(ulong)flash_addr + CONFIG_ENV_SIZE,
	263	up_data,
	264	(ulong)saved_data);
	265	}
0e8d1586	266	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	267
82b54b97	268	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	269
ea882baf WD	270	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	271	goto done;
c609719b	272
7ce1526e MV	273	rc = env_export(&env_new);
7ce1526e MV	274	if (rc)
ea882baf	275	goto done;
c609719b	276
ea882baf WD	277	puts("Erasing Flash...");
	278	if (flash_sect_erase((long)flash_addr, end_addr))
	279	goto done;
c609719b	280
ea882baf WD	281	puts("Writing to Flash... ");
ea882baf WD	282	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	283	if (rc != 0)
	284	goto perror;
	285
ea882baf WD	286	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	287	if (up_data) { /* restore the rest of sector */
	288	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	289	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	290	if (flash_write(saved_data,
	291	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	292	up_data))
82b54b97 IG	293	goto perror;
ea882baf WD	294	}
	295	#endif
	296	puts("done\n");
	297	rc = 0;
82b54b97 IG	298	goto done;
	299	perror:
	300	flash_perror(rc);
ea882baf WD	301	done:
	302	if (saved_data)
	303	free(saved_data);
c609719b	304	/* try to re-protect */
82b54b97	305	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	306	return rc;
c609719b	307	}
c609719b WD	308	#endif /* CMD_SAVEENV */
c609719b WD	309
0e8d1586	310	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	311
ea882baf	312	void env_relocate_spec(void)
c609719b	313	{
0e8d1586	314	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	315	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	316	env_t *etmp = flash_addr;
c609719b WD	317	ulong ltmp = end_addr;
	318
	319	flash_addr = flash_addr_new;
	320	flash_addr_new = etmp;
	321
	322	end_addr = end_addr_new;
	323	end_addr_new = ltmp;
	324	}
	325
c3f9d493	326	if (flash_addr_new->flags != OBSOLETE_FLAG &&
82b54b97	327	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
c3f9d493 WD	328	char flag = OBSOLETE_FLAG;
c3f9d493 WD	329
203e94f6	330	gd->env_valid = ENV_REDUND;
ea882baf	331	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	332	flash_write(&flag,
8bde7f77 WD	333	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	334	sizeof(flash_addr_new->flags));
ea882baf	335	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	336	}
c609719b WD	337
c3f9d493 WD	338	if (flash_addr->flags != ACTIVE_FLAG &&
	339	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	340	char flag = ACTIVE_FLAG;
	341
203e94f6	342	gd->env_valid = ENV_REDUND;
ea882baf	343	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	344	flash_write(&flag,
8bde7f77 WD	345	(ulong)&(flash_addr->flags),
8bde7f77 WD	346	sizeof(flash_addr->flags));
ea882baf	347	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	348	}
c609719b WD	349
203e94f6	350	if (gd->env_valid == ENV_REDUND)
82b54b97 IG	351	puts("*** Warning - some problems detected "
82b54b97 IG	352	"reading environment; recovered successfully\n\n");
0e8d1586	353	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf WD	354
ea882baf WD	355	env_import((char *)flash_addr, 1);
c609719b	356	}
4415f1d1 SG	357
	358	U_BOOT_ENV_LOCATION(flash) = {
	359	.location = ENVL_FLASH,
	360	#ifdef LOADENV
	361	.load = env_relocate_spec,
	362	#endif
	363	#ifdef CMD_SAVEENV
	364	.save = env_save_ptr(saveenv),
	365	#endif
	366	#ifdef INITENV
	367	.init = env_init,
	368	#endif
	369	};