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

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2000-2010
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <[email protected]>
 */

/* #define DEBUG */

#include <common.h>
#include <command.h>
#include <env.h>
#include <env_internal.h>
#include <flash.h>
#include <log.h>
#include <asm/global_data.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <search.h>
#include <errno.h>
#include <u-boot/crc.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

/* TODO([email protected]): 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

#if defined(CONFIG_ENV_ADDR_REDUND) && defined(CMD_SAVEENV) || \
	!defined(CONFIG_ENV_ADDR_REDUND) && defined(INITENV)
#ifdef ENV_IS_EMBEDDED
static env_t *env_ptr = &embedded_environment;
#else /* ! ENV_IS_EMBEDDED */

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

/* 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 == ENV_REDUND_ACTIVE &&
		   flag2 == ENV_REDUND_OBSOLETE) {
		gd->env_addr	= addr1;
		gd->env_valid	= ENV_VALID;
	} else if (flag1 == ENV_REDUND_OBSOLETE &&
		   flag2 == ENV_REDUND_ACTIVE) {
		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 = ENV_REDUND_OBSOLETE, new_flag = ENV_REDUND_ACTIVE;
	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 != ENV_REDUND_OBSOLETE &&
	    crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
		char flag = ENV_REDUND_OBSOLETE;

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

		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, H_EXTERNAL);
}
#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, [email protected].
	5	*
	6	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	7	* Andreas Heppel <[email protected]>
c609719b WD	8	*/
	9
	10	/* #define DEBUG */
	11
	12	#include <common.h>
c609719b	13	#include <command.h>
db197010	14	#include <env.h>
f3998fdc	15	#include <env_internal.h>
0ee48252	16	#include <flash.h>
f7ae49fc	17	#include <log.h>
401d1c4f	18	#include <asm/global_data.h>
c609719b	19	#include <linux/stddef.h>
47cd00fa	20	#include <malloc.h>
ea882baf WD	21	#include <search.h>
ea882baf WD	22	#include <errno.h>
3db71108	23	#include <u-boot/crc.h>
c609719b	24
d87080b7 WD	25	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	26
4415f1d1 SG	27	#ifndef CONFIG_SPL_BUILD
	28	# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
	29	# define CMD_SAVEENV
	30	# elif defined(CONFIG_ENV_ADDR_REDUND)
	31	# error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
	32	# endif
c609719b WD	33	#endif
c609719b WD	34
4415f1d1 SG	35	/* TODO([email protected]): 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
b6cba297 RB	47	#if defined(CONFIG_ENV_ADDR_REDUND) && defined(CMD_SAVEENV) \|\| \
b6cba297 RB	48	!defined(CONFIG_ENV_ADDR_REDUND) && defined(INITENV)
c609719b	49	#ifdef ENV_IS_EMBEDDED
be54ec16	50	static env_t *env_ptr = &embedded_environment;
c609719b WD	51	#else /* ! ENV_IS_EMBEDDED */
c609719b WD	52
b6cba297	53	static env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
c609719b	54	#endif /* ENV_IS_EMBEDDED */
b6cba297 RB	55	#endif
b6cba297 RB	56	static __maybe_unused env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b	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;
d3716dd6 SG	97	} else if (flag1 == ENV_REDUND_ACTIVE &&
d3716dd6 SG	98	flag2 == ENV_REDUND_OBSOLETE) {
82b54b97	99	gd->env_addr = addr1;
203e94f6	100	gd->env_valid = ENV_VALID;
d3716dd6 SG	101	} else if (flag1 == ENV_REDUND_OBSOLETE &&
d3716dd6 SG	102	flag2 == ENV_REDUND_ACTIVE) {
82b54b97	103	gd->env_addr = addr2;
203e94f6	104	gd->env_valid = ENV_VALID;
c3f9d493	105	} else if (flag1 == flag2) {
82b54b97	106	gd->env_addr = addr1;
203e94f6	107	gd->env_valid = ENV_REDUND;
c3f9d493	108	} else if (flag1 == 0xFF) {
82b54b97	109	gd->env_addr = addr1;
203e94f6	110	gd->env_valid = ENV_REDUND;
c3f9d493	111	} else if (flag2 == 0xFF) {
82b54b97	112	gd->env_addr = addr2;
203e94f6	113	gd->env_valid = ENV_REDUND;
c609719b WD	114	}
c609719b WD	115
ea882baf	116	return 0;
c609719b	117	}
4415f1d1	118	#endif
c609719b WD	119
c609719b WD	120	#ifdef CMD_SAVEENV
e5bce247	121	static int env_flash_save(void)
c609719b	122	{
ea882baf	123	env_t env_new;
7ce1526e	124	char *saved_data = NULL;
d3716dd6	125	char flag = ENV_REDUND_OBSOLETE, new_flag = ENV_REDUND_ACTIVE;
82b54b97	126	int rc = 1;
0e8d1586	127	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	128	ulong up_data = 0;
500545cc	129	#endif
c609719b	130
82b54b97	131	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	132
82b54b97	133	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
ea882baf	134	goto done;
c609719b	135
ea882baf	136	debug("Protect off %08lX ... %08lX\n",
c609719b WD	137	(ulong)flash_addr_new, end_addr_new);
c609719b WD	138
82b54b97	139	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
ea882baf	140	goto done;
ea882baf	141
7ce1526e MV	142	rc = env_export(&env_new);
	143	if (rc)
	144	return rc;
82b54b97	145	env_new.flags = new_flag;
c609719b	146
0e8d1586	147	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
82b54b97	148	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
ea882baf	149	debug("Data to save 0x%lX\n", up_data);
47cd00fa	150	if (up_data) {
82b54b97 IG	151	saved_data = malloc(up_data);
82b54b97 IG	152	if (saved_data == NULL) {
8bde7f77	153	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	154	up_data);
ea882baf	155	goto done;
47cd00fa	156	}
8bde7f77	157	memcpy(saved_data,
82b54b97 IG	158	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
82b54b97 IG	159	up_data);
ea882baf WD	160	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	161	(long)flash_addr_new + CONFIG_ENV_SIZE,
	162	up_data, saved_data);
47cd00fa WD	163	}
47cd00fa WD	164	#endif
ea882baf	165	puts("Erasing Flash...");
82b54b97	166	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
c609719b	167
82b54b97	168	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
ea882baf	169	goto done;
c609719b	170
ea882baf WD	171	puts("Writing to Flash... ");
ea882baf WD	172	debug(" %08lX ... %08lX ...",
c609719b	173	(ulong)&(flash_addr_new->data),
82b54b97 IG	174	sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	175	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
	176	sizeof(env_new));
	177	if (rc)
	178	goto perror;
	179
	180	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
	181	sizeof(flash_addr->flags));
	182	if (rc)
	183	goto perror;
c609719b	184
0e8d1586	185	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	186	if (up_data) { /* restore the rest of sector */
ea882baf WD	187	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	188	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	189	if (flash_write(saved_data,
0e8d1586	190	(long)flash_addr_new + CONFIG_ENV_SIZE,
82b54b97 IG	191	up_data))
82b54b97 IG	192	goto perror;
47cd00fa WD	193	}
47cd00fa WD	194	#endif
ea882baf WD	195	puts("done\n");
ea882baf WD	196
c609719b	197	{
82b54b97	198	env_t *etmp = flash_addr;
c609719b WD	199	ulong ltmp = end_addr;
	200
	201	flash_addr = flash_addr_new;
	202	flash_addr_new = etmp;
	203
	204	end_addr = end_addr_new;
	205	end_addr_new = ltmp;
	206	}
	207
	208	rc = 0;
82b54b97 IG	209	goto done;
	210	perror:
	211	flash_perror(rc);
ea882baf	212	done:
47cd00fa	213	if (saved_data)
ea882baf	214	free(saved_data);
c609719b	215	/* try to re-protect */
82b54b97 IG	216	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	217	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	218
	219	return rc;
	220	}
	221	#endif /* CMD_SAVEENV */
	222
0e8d1586	223	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	224
4415f1d1	225	#ifdef INITENV
e5bce247	226	static int env_flash_init(void)
c609719b	227	{
c609719b	228	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97	229	gd->env_addr = (ulong)&(env_ptr->data);
203e94f6	230	gd->env_valid = ENV_VALID;
82b54b97	231	return 0;
c609719b	232	}
9bb8b209	233
82b54b97	234	gd->env_addr = (ulong)&default_environment[0];
2d7cb5b4	235	gd->env_valid = ENV_INVALID;
ea882baf	236	return 0;
c609719b	237	}
4415f1d1	238	#endif
c609719b WD	239
c609719b WD	240	#ifdef CMD_SAVEENV
e5bce247	241	static int env_flash_save(void)
c609719b	242	{
ea882baf	243	env_t env_new;
ea882baf	244	int rc = 1;
3fa1981e	245	char *saved_data = NULL;
ea882baf WD	246	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	247	ulong up_data = 0;
c609719b	248
82b54b97	249	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	250	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	251	if (up_data) {
82b54b97 IG	252	saved_data = malloc(up_data);
82b54b97 IG	253	if (saved_data == NULL) {
ea882baf WD	254	printf("Unable to save the rest of sector (%ld)\n",
	255	up_data);
	256	goto done;
	257	}
	258	memcpy(saved_data,
	259	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	260	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	261	(ulong)flash_addr + CONFIG_ENV_SIZE,
	262	up_data,
	263	(ulong)saved_data);
	264	}
0e8d1586	265	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	266
82b54b97	267	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	268
ea882baf WD	269	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	270	goto done;
c609719b	271
7ce1526e MV	272	rc = env_export(&env_new);
7ce1526e MV	273	if (rc)
ea882baf	274	goto done;
c609719b	275
ea882baf WD	276	puts("Erasing Flash...");
	277	if (flash_sect_erase((long)flash_addr, end_addr))
	278	goto done;
c609719b	279
ea882baf WD	280	puts("Writing to Flash... ");
ea882baf WD	281	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	282	if (rc != 0)
	283	goto perror;
	284
ea882baf WD	285	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	286	if (up_data) { /* restore the rest of sector */
	287	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	288	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	289	if (flash_write(saved_data,
	290	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	291	up_data))
82b54b97 IG	292	goto perror;
ea882baf WD	293	}
	294	#endif
	295	puts("done\n");
	296	rc = 0;
82b54b97 IG	297	goto done;
	298	perror:
	299	flash_perror(rc);
ea882baf WD	300	done:
	301	if (saved_data)
	302	free(saved_data);
c609719b	303	/* try to re-protect */
82b54b97	304	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	305	return rc;
c609719b	306	}
c609719b WD	307	#endif /* CMD_SAVEENV */
c609719b WD	308
0e8d1586	309	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	310
e5bce247	311	#ifdef LOADENV
c5951991	312	static int env_flash_load(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
d3716dd6	326	if (flash_addr_new->flags != ENV_REDUND_OBSOLETE &&
82b54b97	327	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
d3716dd6	328	char flag = ENV_REDUND_OBSOLETE;
c3f9d493	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
d3716dd6 SG	338	if (flash_addr->flags != ENV_REDUND_ACTIVE &&
	339	(flash_addr->flags & ENV_REDUND_ACTIVE) == ENV_REDUND_ACTIVE) {
	340	char flag = ENV_REDUND_ACTIVE;
c3f9d493	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	354
890feeca	355	return env_import((char *)flash_addr, 1, H_EXTERNAL);
c609719b	356	}
e5bce247	357	#endif /* LOADENV */
4415f1d1 SG	358
	359	U_BOOT_ENV_LOCATION(flash) = {
	360	.location = ENVL_FLASH,
ac358beb	361	ENV_NAME("Flash")
4415f1d1	362	#ifdef LOADENV
e5bce247	363	.load = env_flash_load,
4415f1d1 SG	364	#endif
4415f1d1 SG	365	#ifdef CMD_SAVEENV
e5bce247	366	.save = env_save_ptr(env_flash_save),
4415f1d1 SG	367	#endif
4415f1d1 SG	368	#ifdef INITENV
e5bce247	369	.init = env_flash_init,
4415f1d1 SG	370	#endif
4415f1d1 SG	371	};