[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

#ifdef ENV_IS_EMBEDDED
env_t *env_ptr = &environment;

static __maybe_unused env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;

#else /* ! ENV_IS_EMBEDDED */

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

/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
static ulong __maybe_unused end_addr =
		CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;

#ifdef CONFIG_ENV_ADDR_REDUND

static env_t __maybe_unused *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;

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

#ifdef CONFIG_ENV_ADDR_REDUND
#ifdef INITENV
static int env_flash_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	= ENV_INVALID;
	} 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
static int env_flash_save(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
static int env_flash_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	= ENV_INVALID;
	return 0;
}
#endif

#ifdef CMD_SAVEENV
static int env_flash_save(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 */

#ifdef LOADENV
static int env_flash_load(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 */

	return env_import((char *)flash_addr, 1);
}
#endif /* LOADENV */

U_BOOT_ENV_LOCATION(flash) = {
	.location	= ENVL_FLASH,
	ENV_NAME("Flash")
#ifdef LOADENV
	.load		= env_flash_load,
#endif
#ifdef CMD_SAVEENV
	.save		= env_save_ptr(env_flash_save),
#endif
#ifdef INITENV
	.init		= env_flash_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
c609719b	48	#ifdef ENV_IS_EMBEDDED
994bc671	49	env_t *env_ptr = &environment;
c609719b	50
e5bce247	51	static __maybe_unused env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	52
	53	#else /* ! ENV_IS_EMBEDDED */
	54
0e8d1586	55	env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
e5bce247	56	static __maybe_unused env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	57	#endif /* ENV_IS_EMBEDDED */
c609719b WD	58
ea882baf	59	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
e5bce247 SG	60	static ulong __maybe_unused end_addr =
e5bce247 SG	61	CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
ea882baf	62
0e8d1586	63	#ifdef CONFIG_ENV_ADDR_REDUND
e5bce247 SG	64
e5bce247 SG	65	static env_t __maybe_unused flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	66
ea882baf	67	/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
e5bce247 SG	68	static ulong __maybe_unused end_addr_new =
e5bce247 SG	69	CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
0e8d1586	70	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	71
0e8d1586	72	#ifdef CONFIG_ENV_ADDR_REDUND
4415f1d1	73	#ifdef INITENV
e5bce247	74	static int env_flash_init(void)
c609719b	75	{
8ed96046	76	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	77
	78	uchar flag1 = flash_addr->flags;
	79	uchar flag2 = flash_addr_new->flags;
	80
	81	ulong addr_default = (ulong)&default_environment[0];
	82	ulong addr1 = (ulong)&(flash_addr->data);
	83	ulong addr2 = (ulong)&(flash_addr_new->data);
	84
82b54b97 IG	85	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	86	crc2_ok =
	87	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
	88
	89	if (crc1_ok && !crc2_ok) {
	90	gd->env_addr = addr1;
203e94f6	91	gd->env_valid = ENV_VALID;
82b54b97 IG	92	} else if (!crc1_ok && crc2_ok) {
82b54b97 IG	93	gd->env_addr = addr2;
203e94f6	94	gd->env_valid = ENV_VALID;
82b54b97 IG	95	} else if (!crc1_ok && !crc2_ok) {
82b54b97 IG	96	gd->env_addr = addr_default;
2d7cb5b4	97	gd->env_valid = ENV_INVALID;
c3f9d493	98	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
82b54b97	99	gd->env_addr = addr1;
203e94f6	100	gd->env_valid = ENV_VALID;
c3f9d493	101	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
82b54b97	102	gd->env_addr = addr2;
203e94f6	103	gd->env_valid = ENV_VALID;
c3f9d493	104	} else if (flag1 == flag2) {
82b54b97	105	gd->env_addr = addr1;
203e94f6	106	gd->env_valid = ENV_REDUND;
c3f9d493	107	} else if (flag1 == 0xFF) {
82b54b97	108	gd->env_addr = addr1;
203e94f6	109	gd->env_valid = ENV_REDUND;
c3f9d493	110	} else if (flag2 == 0xFF) {
82b54b97	111	gd->env_addr = addr2;
203e94f6	112	gd->env_valid = ENV_REDUND;
c609719b WD	113	}
c609719b WD	114
ea882baf	115	return 0;
c609719b	116	}
4415f1d1	117	#endif
c609719b WD	118
c609719b WD	119	#ifdef CMD_SAVEENV
e5bce247	120	static int env_flash_save(void)
c609719b	121	{
ea882baf	122	env_t env_new;
7ce1526e	123	char *saved_data = NULL;
ea882baf	124	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
82b54b97	125	int rc = 1;
0e8d1586	126	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	127	ulong up_data = 0;
500545cc	128	#endif
c609719b	129
82b54b97	130	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	131
82b54b97	132	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
ea882baf	133	goto done;
c609719b	134
ea882baf	135	debug("Protect off %08lX ... %08lX\n",
c609719b WD	136	(ulong)flash_addr_new, end_addr_new);
c609719b WD	137
82b54b97	138	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
ea882baf	139	goto done;
ea882baf	140
7ce1526e MV	141	rc = env_export(&env_new);
	142	if (rc)
	143	return rc;
82b54b97	144	env_new.flags = new_flag;
c609719b	145
0e8d1586	146	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
82b54b97	147	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
ea882baf	148	debug("Data to save 0x%lX\n", up_data);
47cd00fa	149	if (up_data) {
82b54b97 IG	150	saved_data = malloc(up_data);
82b54b97 IG	151	if (saved_data == NULL) {
8bde7f77	152	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	153	up_data);
ea882baf	154	goto done;
47cd00fa	155	}
8bde7f77	156	memcpy(saved_data,
82b54b97 IG	157	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
82b54b97 IG	158	up_data);
ea882baf WD	159	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	160	(long)flash_addr_new + CONFIG_ENV_SIZE,
	161	up_data, saved_data);
47cd00fa WD	162	}
47cd00fa WD	163	#endif
ea882baf	164	puts("Erasing Flash...");
82b54b97	165	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
c609719b	166
82b54b97	167	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
ea882baf	168	goto done;
c609719b	169
ea882baf WD	170	puts("Writing to Flash... ");
ea882baf WD	171	debug(" %08lX ... %08lX ...",
c609719b	172	(ulong)&(flash_addr_new->data),
82b54b97 IG	173	sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	174	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
	175	sizeof(env_new));
	176	if (rc)
	177	goto perror;
	178
	179	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
	180	sizeof(flash_addr->flags));
	181	if (rc)
	182	goto perror;
c609719b	183
0e8d1586	184	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	185	if (up_data) { /* restore the rest of sector */
ea882baf WD	186	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	187	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	188	if (flash_write(saved_data,
0e8d1586	189	(long)flash_addr_new + CONFIG_ENV_SIZE,
82b54b97 IG	190	up_data))
82b54b97 IG	191	goto perror;
47cd00fa WD	192	}
47cd00fa WD	193	#endif
ea882baf WD	194	puts("done\n");
ea882baf WD	195
c609719b	196	{
82b54b97	197	env_t *etmp = flash_addr;
c609719b WD	198	ulong ltmp = end_addr;
	199
	200	flash_addr = flash_addr_new;
	201	flash_addr_new = etmp;
	202
	203	end_addr = end_addr_new;
	204	end_addr_new = ltmp;
	205	}
	206
	207	rc = 0;
82b54b97 IG	208	goto done;
	209	perror:
	210	flash_perror(rc);
ea882baf	211	done:
47cd00fa	212	if (saved_data)
ea882baf	213	free(saved_data);
c609719b	214	/* try to re-protect */
82b54b97 IG	215	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	216	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	217
	218	return rc;
	219	}
	220	#endif /* CMD_SAVEENV */
	221
0e8d1586	222	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	223
4415f1d1	224	#ifdef INITENV
e5bce247	225	static int env_flash_init(void)
c609719b	226	{
c609719b	227	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97	228	gd->env_addr = (ulong)&(env_ptr->data);
203e94f6	229	gd->env_valid = ENV_VALID;
82b54b97	230	return 0;
c609719b	231	}
9bb8b209	232
82b54b97	233	gd->env_addr = (ulong)&default_environment[0];
2d7cb5b4	234	gd->env_valid = ENV_INVALID;
ea882baf	235	return 0;
c609719b	236	}
4415f1d1	237	#endif
c609719b WD	238
c609719b WD	239	#ifdef CMD_SAVEENV
e5bce247	240	static int env_flash_save(void)
c609719b	241	{
ea882baf	242	env_t env_new;
ea882baf	243	int rc = 1;
3fa1981e	244	char *saved_data = NULL;
ea882baf WD	245	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	246	ulong up_data = 0;
c609719b	247
82b54b97	248	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	249	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	250	if (up_data) {
82b54b97 IG	251	saved_data = malloc(up_data);
82b54b97 IG	252	if (saved_data == NULL) {
ea882baf WD	253	printf("Unable to save the rest of sector (%ld)\n",
	254	up_data);
	255	goto done;
	256	}
	257	memcpy(saved_data,
	258	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	259	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	260	(ulong)flash_addr + CONFIG_ENV_SIZE,
	261	up_data,
	262	(ulong)saved_data);
	263	}
0e8d1586	264	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	265
82b54b97	266	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	267
ea882baf WD	268	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	269	goto done;
c609719b	270
7ce1526e MV	271	rc = env_export(&env_new);
7ce1526e MV	272	if (rc)
ea882baf	273	goto done;
c609719b	274
ea882baf WD	275	puts("Erasing Flash...");
	276	if (flash_sect_erase((long)flash_addr, end_addr))
	277	goto done;
c609719b	278
ea882baf WD	279	puts("Writing to Flash... ");
ea882baf WD	280	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	281	if (rc != 0)
	282	goto perror;
	283
ea882baf WD	284	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	285	if (up_data) { /* restore the rest of sector */
	286	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	287	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	288	if (flash_write(saved_data,
	289	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	290	up_data))
82b54b97 IG	291	goto perror;
ea882baf WD	292	}
	293	#endif
	294	puts("done\n");
	295	rc = 0;
82b54b97 IG	296	goto done;
	297	perror:
	298	flash_perror(rc);
ea882baf WD	299	done:
	300	if (saved_data)
	301	free(saved_data);
c609719b	302	/* try to re-protect */
82b54b97	303	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	304	return rc;
c609719b	305	}
c609719b WD	306	#endif /* CMD_SAVEENV */
c609719b WD	307
0e8d1586	308	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	309
e5bce247	310	#ifdef LOADENV
c5951991	311	static int env_flash_load(void)
c609719b	312	{
0e8d1586	313	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	314	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	315	env_t *etmp = flash_addr;
c609719b WD	316	ulong ltmp = end_addr;
	317
	318	flash_addr = flash_addr_new;
	319	flash_addr_new = etmp;
	320
	321	end_addr = end_addr_new;
	322	end_addr_new = ltmp;
	323	}
	324
c3f9d493	325	if (flash_addr_new->flags != OBSOLETE_FLAG &&
82b54b97	326	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
c3f9d493 WD	327	char flag = OBSOLETE_FLAG;
c3f9d493 WD	328
203e94f6	329	gd->env_valid = ENV_REDUND;
ea882baf	330	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	331	flash_write(&flag,
8bde7f77 WD	332	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	333	sizeof(flash_addr_new->flags));
ea882baf	334	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	335	}
c609719b WD	336
c3f9d493 WD	337	if (flash_addr->flags != ACTIVE_FLAG &&
	338	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	339	char flag = ACTIVE_FLAG;
	340
203e94f6	341	gd->env_valid = ENV_REDUND;
ea882baf	342	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	343	flash_write(&flag,
8bde7f77 WD	344	(ulong)&(flash_addr->flags),
8bde7f77 WD	345	sizeof(flash_addr->flags));
ea882baf	346	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	347	}
c609719b WD	348
203e94f6	349	if (gd->env_valid == ENV_REDUND)
82b54b97 IG	350	puts("*** Warning - some problems detected "
82b54b97 IG	351	"reading environment; recovered successfully\n\n");
0e8d1586	352	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf	353
2166ebf7	354	return env_import((char *)flash_addr, 1);
c609719b	355	}
e5bce247	356	#endif /* LOADENV */
4415f1d1 SG	357
	358	U_BOOT_ENV_LOCATION(flash) = {
	359	.location = ENVL_FLASH,
ac358beb	360	ENV_NAME("Flash")
4415f1d1	361	#ifdef LOADENV
e5bce247	362	.load = env_flash_load,
4415f1d1 SG	363	#endif
4415f1d1 SG	364	#ifdef CMD_SAVEENV
e5bce247	365	.save = env_save_ptr(env_flash_save),
4415f1d1 SG	366	#endif
4415f1d1 SG	367	#ifdef INITENV
e5bce247	368	.init = env_flash_init,
4415f1d1 SG	369	#endif
4415f1d1 SG	370	};