[thirdparty/u-boot.git] / env / flash.c

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

/* #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
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
c609719b	2	/*
ea882baf	3	* (C) Copyright 2000-2010
c609719b WD	4	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	5	*
	6	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	7	* Andreas Heppel <aheppel@sysgo.de>
c609719b WD	8	*/
	9
	10	/* #define DEBUG */
	11
	12	#include <common.h>
c609719b WD	13	#include <command.h>
c609719b WD	14	#include <environment.h>
c609719b	15	#include <linux/stddef.h>
47cd00fa	16	#include <malloc.h>
ea882baf WD	17	#include <search.h>
ea882baf WD	18	#include <errno.h>
c609719b	19
d87080b7 WD	20	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	21
4415f1d1 SG	22	#ifndef CONFIG_SPL_BUILD
	23	# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
	24	# define CMD_SAVEENV
	25	# elif defined(CONFIG_ENV_ADDR_REDUND)
	26	# error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
	27	# endif
c609719b WD	28	#endif
c609719b WD	29
82b54b97 IG	30	#if defined(CONFIG_ENV_SIZE_REDUND) && \
82b54b97 IG	31	(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
0e8d1586	32	#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
c609719b WD	33	#endif
c609719b WD	34
4415f1d1 SG	35	/* TODO(sjg@chromium.org): Figure out all these special cases */
	36	#if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
	37	!defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
	38	!defined(CONFIG_TARGET_EDMINIV2)) \|\| \
	39	!defined(CONFIG_SPL_BUILD)
	40	#define LOADENV
	41	#endif
	42
	43	#if !defined(CONFIG_TARGET_X600) \|\| !defined(CONFIG_SPL_BUILD)
	44	#define INITENV
	45	#endif
	46
c609719b	47	#ifdef ENV_IS_EMBEDDED
994bc671	48	env_t *env_ptr = &environment;
c609719b	49
e5bce247	50	static __maybe_unused env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	51
	52	#else /* ! ENV_IS_EMBEDDED */
	53
0e8d1586	54	env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
e5bce247	55	static __maybe_unused env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	56	#endif /* ENV_IS_EMBEDDED */
c609719b WD	57
ea882baf	58	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
e5bce247 SG	59	static ulong __maybe_unused end_addr =
e5bce247 SG	60	CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
ea882baf	61
0e8d1586	62	#ifdef CONFIG_ENV_ADDR_REDUND
e5bce247 SG	63
e5bce247 SG	64	static env_t __maybe_unused flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	65
ea882baf	66	/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
e5bce247 SG	67	static ulong __maybe_unused end_addr_new =
e5bce247 SG	68	CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
0e8d1586	69	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	70
0e8d1586	71	#ifdef CONFIG_ENV_ADDR_REDUND
4415f1d1	72	#ifdef INITENV
e5bce247	73	static int env_flash_init(void)
c609719b	74	{
8ed96046	75	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	76
	77	uchar flag1 = flash_addr->flags;
	78	uchar flag2 = flash_addr_new->flags;
	79
	80	ulong addr_default = (ulong)&default_environment[0];
	81	ulong addr1 = (ulong)&(flash_addr->data);
	82	ulong addr2 = (ulong)&(flash_addr_new->data);
	83
82b54b97 IG	84	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	85	crc2_ok =
	86	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
	87
	88	if (crc1_ok && !crc2_ok) {
	89	gd->env_addr = addr1;
203e94f6	90	gd->env_valid = ENV_VALID;
82b54b97 IG	91	} else if (!crc1_ok && crc2_ok) {
82b54b97 IG	92	gd->env_addr = addr2;
203e94f6	93	gd->env_valid = ENV_VALID;
82b54b97 IG	94	} else if (!crc1_ok && !crc2_ok) {
82b54b97 IG	95	gd->env_addr = addr_default;
2d7cb5b4	96	gd->env_valid = ENV_INVALID;
c3f9d493	97	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
82b54b97	98	gd->env_addr = addr1;
203e94f6	99	gd->env_valid = ENV_VALID;
c3f9d493	100	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
82b54b97	101	gd->env_addr = addr2;
203e94f6	102	gd->env_valid = ENV_VALID;
c3f9d493	103	} else if (flag1 == flag2) {
82b54b97	104	gd->env_addr = addr1;
203e94f6	105	gd->env_valid = ENV_REDUND;
c3f9d493	106	} else if (flag1 == 0xFF) {
82b54b97	107	gd->env_addr = addr1;
203e94f6	108	gd->env_valid = ENV_REDUND;
c3f9d493	109	} else if (flag2 == 0xFF) {
82b54b97	110	gd->env_addr = addr2;
203e94f6	111	gd->env_valid = ENV_REDUND;
c609719b WD	112	}
c609719b WD	113
ea882baf	114	return 0;
c609719b	115	}
4415f1d1	116	#endif
c609719b WD	117
c609719b WD	118	#ifdef CMD_SAVEENV
e5bce247	119	static int env_flash_save(void)
c609719b	120	{
ea882baf	121	env_t env_new;
7ce1526e	122	char *saved_data = NULL;
ea882baf	123	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
82b54b97	124	int rc = 1;
0e8d1586	125	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	126	ulong up_data = 0;
500545cc	127	#endif
c609719b	128
82b54b97	129	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	130
82b54b97	131	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
ea882baf	132	goto done;
c609719b	133
ea882baf	134	debug("Protect off %08lX ... %08lX\n",
c609719b WD	135	(ulong)flash_addr_new, end_addr_new);
c609719b WD	136
82b54b97	137	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
ea882baf	138	goto done;
ea882baf	139
7ce1526e MV	140	rc = env_export(&env_new);
	141	if (rc)
	142	return rc;
82b54b97	143	env_new.flags = new_flag;
c609719b	144
0e8d1586	145	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
82b54b97	146	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
ea882baf	147	debug("Data to save 0x%lX\n", up_data);
47cd00fa	148	if (up_data) {
82b54b97 IG	149	saved_data = malloc(up_data);
82b54b97 IG	150	if (saved_data == NULL) {
8bde7f77	151	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	152	up_data);
ea882baf	153	goto done;
47cd00fa	154	}
8bde7f77	155	memcpy(saved_data,
82b54b97 IG	156	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
82b54b97 IG	157	up_data);
ea882baf WD	158	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	159	(long)flash_addr_new + CONFIG_ENV_SIZE,
	160	up_data, saved_data);
47cd00fa WD	161	}
47cd00fa WD	162	#endif
ea882baf	163	puts("Erasing Flash...");
82b54b97	164	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
c609719b	165
82b54b97	166	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
ea882baf	167	goto done;
c609719b	168
ea882baf WD	169	puts("Writing to Flash... ");
ea882baf WD	170	debug(" %08lX ... %08lX ...",
c609719b	171	(ulong)&(flash_addr_new->data),
82b54b97 IG	172	sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	173	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
	174	sizeof(env_new));
	175	if (rc)
	176	goto perror;
	177
	178	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
	179	sizeof(flash_addr->flags));
	180	if (rc)
	181	goto perror;
c609719b	182
0e8d1586	183	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	184	if (up_data) { /* restore the rest of sector */
ea882baf WD	185	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	186	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	187	if (flash_write(saved_data,
0e8d1586	188	(long)flash_addr_new + CONFIG_ENV_SIZE,
82b54b97 IG	189	up_data))
82b54b97 IG	190	goto perror;
47cd00fa WD	191	}
47cd00fa WD	192	#endif
ea882baf WD	193	puts("done\n");
ea882baf WD	194
c609719b	195	{
82b54b97	196	env_t *etmp = flash_addr;
c609719b WD	197	ulong ltmp = end_addr;
	198
	199	flash_addr = flash_addr_new;
	200	flash_addr_new = etmp;
	201
	202	end_addr = end_addr_new;
	203	end_addr_new = ltmp;
	204	}
	205
	206	rc = 0;
82b54b97 IG	207	goto done;
	208	perror:
	209	flash_perror(rc);
ea882baf	210	done:
47cd00fa	211	if (saved_data)
ea882baf	212	free(saved_data);
c609719b	213	/* try to re-protect */
82b54b97 IG	214	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	215	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	216
	217	return rc;
	218	}
	219	#endif /* CMD_SAVEENV */
	220
0e8d1586	221	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	222
4415f1d1	223	#ifdef INITENV
e5bce247	224	static int env_flash_init(void)
c609719b	225	{
c609719b	226	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97	227	gd->env_addr = (ulong)&(env_ptr->data);
203e94f6	228	gd->env_valid = ENV_VALID;
82b54b97	229	return 0;
c609719b	230	}
9bb8b209	231
82b54b97	232	gd->env_addr = (ulong)&default_environment[0];
2d7cb5b4	233	gd->env_valid = ENV_INVALID;
ea882baf	234	return 0;
c609719b	235	}
4415f1d1	236	#endif
c609719b WD	237
c609719b WD	238	#ifdef CMD_SAVEENV
e5bce247	239	static int env_flash_save(void)
c609719b	240	{
ea882baf	241	env_t env_new;
ea882baf	242	int rc = 1;
3fa1981e	243	char *saved_data = NULL;
ea882baf WD	244	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	245	ulong up_data = 0;
c609719b	246
82b54b97	247	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	248	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	249	if (up_data) {
82b54b97 IG	250	saved_data = malloc(up_data);
82b54b97 IG	251	if (saved_data == NULL) {
ea882baf WD	252	printf("Unable to save the rest of sector (%ld)\n",
	253	up_data);
	254	goto done;
	255	}
	256	memcpy(saved_data,
	257	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	258	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	259	(ulong)flash_addr + CONFIG_ENV_SIZE,
	260	up_data,
	261	(ulong)saved_data);
	262	}
0e8d1586	263	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	264
82b54b97	265	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	266
ea882baf WD	267	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	268	goto done;
c609719b	269
7ce1526e MV	270	rc = env_export(&env_new);
7ce1526e MV	271	if (rc)
ea882baf	272	goto done;
c609719b	273
ea882baf WD	274	puts("Erasing Flash...");
	275	if (flash_sect_erase((long)flash_addr, end_addr))
	276	goto done;
c609719b	277
ea882baf WD	278	puts("Writing to Flash... ");
ea882baf WD	279	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	280	if (rc != 0)
	281	goto perror;
	282
ea882baf WD	283	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	284	if (up_data) { /* restore the rest of sector */
	285	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	286	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	287	if (flash_write(saved_data,
	288	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	289	up_data))
82b54b97 IG	290	goto perror;
ea882baf WD	291	}
	292	#endif
	293	puts("done\n");
	294	rc = 0;
82b54b97 IG	295	goto done;
	296	perror:
	297	flash_perror(rc);
ea882baf WD	298	done:
	299	if (saved_data)
	300	free(saved_data);
c609719b	301	/* try to re-protect */
82b54b97	302	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	303	return rc;
c609719b	304	}
c609719b WD	305	#endif /* CMD_SAVEENV */
c609719b WD	306
0e8d1586	307	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	308
e5bce247	309	#ifdef LOADENV
c5951991	310	static int env_flash_load(void)
c609719b	311	{
0e8d1586	312	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	313	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	314	env_t *etmp = flash_addr;
c609719b WD	315	ulong ltmp = end_addr;
	316
	317	flash_addr = flash_addr_new;
	318	flash_addr_new = etmp;
	319
	320	end_addr = end_addr_new;
	321	end_addr_new = ltmp;
	322	}
	323
c3f9d493	324	if (flash_addr_new->flags != OBSOLETE_FLAG &&
82b54b97	325	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
c3f9d493 WD	326	char flag = OBSOLETE_FLAG;
c3f9d493 WD	327
203e94f6	328	gd->env_valid = ENV_REDUND;
ea882baf	329	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	330	flash_write(&flag,
8bde7f77 WD	331	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	332	sizeof(flash_addr_new->flags));
ea882baf	333	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	334	}
c609719b WD	335
c3f9d493 WD	336	if (flash_addr->flags != ACTIVE_FLAG &&
	337	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	338	char flag = ACTIVE_FLAG;
	339
203e94f6	340	gd->env_valid = ENV_REDUND;
ea882baf	341	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	342	flash_write(&flag,
8bde7f77 WD	343	(ulong)&(flash_addr->flags),
8bde7f77 WD	344	sizeof(flash_addr->flags));
ea882baf	345	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	346	}
c609719b WD	347
203e94f6	348	if (gd->env_valid == ENV_REDUND)
82b54b97 IG	349	puts("*** Warning - some problems detected "
82b54b97 IG	350	"reading environment; recovered successfully\n\n");
0e8d1586	351	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf	352
2166ebf7	353	return env_import((char *)flash_addr, 1);
c609719b	354	}
e5bce247	355	#endif /* LOADENV */
4415f1d1 SG	356
	357	U_BOOT_ENV_LOCATION(flash) = {
	358	.location = ENVL_FLASH,
ac358beb	359	ENV_NAME("Flash")
4415f1d1	360	#ifdef LOADENV
e5bce247	361	.load = env_flash_load,
4415f1d1 SG	362	#endif
4415f1d1 SG	363	#ifdef CMD_SAVEENV
e5bce247	364	.save = env_save_ptr(env_flash_save),
4415f1d1 SG	365	#endif
4415f1d1 SG	366	#ifdef INITENV
e5bce247	367	.init = env_flash_init,
4415f1d1 SG	368	#endif
4415f1d1 SG	369	};