[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 <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)
#  include <flash.h>
#  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 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_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:
	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_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:
	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>
f7ae49fc	16	#include <log.h>
401d1c4f	17	#include <asm/global_data.h>
c609719b	18	#include <linux/stddef.h>
47cd00fa	19	#include <malloc.h>
ea882baf WD	20	#include <search.h>
ea882baf WD	21	#include <errno.h>
3db71108	22	#include <u-boot/crc.h>
c609719b	23
d87080b7 WD	24	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	25
4415f1d1 SG	26	#ifndef CONFIG_SPL_BUILD
4415f1d1 SG	27	# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
17ead040	28	# include <flash.h>
4415f1d1 SG	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
c609719b WD	80	ulong addr1 = (ulong)&(flash_addr->data);
	81	ulong addr2 = (ulong)&(flash_addr_new->data);
	82
82b54b97 IG	83	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	84	crc2_ok =
	85	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
	86
	87	if (crc1_ok && !crc2_ok) {
	88	gd->env_addr = addr1;
203e94f6	89	gd->env_valid = ENV_VALID;
82b54b97 IG	90	} else if (!crc1_ok && crc2_ok) {
82b54b97 IG	91	gd->env_addr = addr2;
203e94f6	92	gd->env_valid = ENV_VALID;
82b54b97	93	} else if (!crc1_ok && !crc2_ok) {
2d7cb5b4	94	gd->env_valid = ENV_INVALID;
d3716dd6 SG	95	} else if (flag1 == ENV_REDUND_ACTIVE &&
d3716dd6 SG	96	flag2 == ENV_REDUND_OBSOLETE) {
82b54b97	97	gd->env_addr = addr1;
203e94f6	98	gd->env_valid = ENV_VALID;
d3716dd6 SG	99	} else if (flag1 == ENV_REDUND_OBSOLETE &&
d3716dd6 SG	100	flag2 == ENV_REDUND_ACTIVE) {
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;
d3716dd6	123	char flag = ENV_REDUND_OBSOLETE, new_flag = ENV_REDUND_ACTIVE;
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:
28ab12ad	211	free(saved_data);
c609719b	212	/* try to re-protect */
82b54b97 IG	213	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	214	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	215
	216	return rc;
	217	}
	218	#endif /* CMD_SAVEENV */
	219
0e8d1586	220	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	221
4415f1d1	222	#ifdef INITENV
e5bce247	223	static int env_flash_init(void)
c609719b	224	{
c609719b	225	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97	226	gd->env_addr = (ulong)&(env_ptr->data);
203e94f6	227	gd->env_valid = ENV_VALID;
82b54b97	228	return 0;
c609719b	229	}
9bb8b209	230
ee483902	231	gd->env_valid = ENV_INVALID;
ea882baf	232	return 0;
c609719b	233	}
4415f1d1	234	#endif
c609719b WD	235
c609719b WD	236	#ifdef CMD_SAVEENV
e5bce247	237	static int env_flash_save(void)
c609719b	238	{
ea882baf	239	env_t env_new;
ea882baf	240	int rc = 1;
3fa1981e	241	char *saved_data = NULL;
ea882baf WD	242	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	243	ulong up_data = 0;
c609719b	244
82b54b97	245	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	246	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	247	if (up_data) {
82b54b97 IG	248	saved_data = malloc(up_data);
82b54b97 IG	249	if (saved_data == NULL) {
ea882baf WD	250	printf("Unable to save the rest of sector (%ld)\n",
	251	up_data);
	252	goto done;
	253	}
	254	memcpy(saved_data,
	255	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	256	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	257	(ulong)flash_addr + CONFIG_ENV_SIZE,
	258	up_data,
	259	(ulong)saved_data);
	260	}
0e8d1586	261	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	262
82b54b97	263	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	264
ea882baf WD	265	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	266	goto done;
c609719b	267
7ce1526e MV	268	rc = env_export(&env_new);
7ce1526e MV	269	if (rc)
ea882baf	270	goto done;
c609719b	271
ea882baf WD	272	puts("Erasing Flash...");
	273	if (flash_sect_erase((long)flash_addr, end_addr))
	274	goto done;
c609719b	275
ea882baf WD	276	puts("Writing to Flash... ");
ea882baf WD	277	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	278	if (rc != 0)
	279	goto perror;
	280
ea882baf WD	281	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	282	if (up_data) { /* restore the rest of sector */
	283	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	284	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	285	if (flash_write(saved_data,
	286	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	287	up_data))
82b54b97 IG	288	goto perror;
ea882baf WD	289	}
	290	#endif
	291	puts("done\n");
	292	rc = 0;
82b54b97 IG	293	goto done;
	294	perror:
	295	flash_perror(rc);
ea882baf	296	done:
28ab12ad	297	free(saved_data);
c609719b	298	/* try to re-protect */
82b54b97	299	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	300	return rc;
c609719b	301	}
c609719b WD	302	#endif /* CMD_SAVEENV */
c609719b WD	303
0e8d1586	304	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	305
e5bce247	306	#ifdef LOADENV
c5951991	307	static int env_flash_load(void)
c609719b	308	{
0e8d1586	309	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	310	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	311	env_t *etmp = flash_addr;
c609719b WD	312	ulong ltmp = end_addr;
	313
	314	flash_addr = flash_addr_new;
	315	flash_addr_new = etmp;
	316
	317	end_addr = end_addr_new;
	318	end_addr_new = ltmp;
	319	}
	320
d3716dd6	321	if (flash_addr_new->flags != ENV_REDUND_OBSOLETE &&
82b54b97	322	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
d3716dd6	323	char flag = ENV_REDUND_OBSOLETE;
c3f9d493	324
203e94f6	325	gd->env_valid = ENV_REDUND;
ea882baf	326	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	327	flash_write(&flag,
8bde7f77 WD	328	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	329	sizeof(flash_addr_new->flags));
ea882baf	330	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	331	}
c609719b WD	332
d3716dd6 SG	333	if (flash_addr->flags != ENV_REDUND_ACTIVE &&
	334	(flash_addr->flags & ENV_REDUND_ACTIVE) == ENV_REDUND_ACTIVE) {
	335	char flag = ENV_REDUND_ACTIVE;
c3f9d493	336
203e94f6	337	gd->env_valid = ENV_REDUND;
ea882baf	338	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	339	flash_write(&flag,
8bde7f77 WD	340	(ulong)&(flash_addr->flags),
8bde7f77 WD	341	sizeof(flash_addr->flags));
ea882baf	342	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	343	}
c609719b WD	344
203e94f6	345	if (gd->env_valid == ENV_REDUND)
82b54b97 IG	346	puts("*** Warning - some problems detected "
82b54b97 IG	347	"reading environment; recovered successfully\n\n");
0e8d1586	348	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf	349
890feeca	350	return env_import((char *)flash_addr, 1, H_EXTERNAL);
c609719b	351	}
e5bce247	352	#endif /* LOADENV */
4415f1d1 SG	353
	354	U_BOOT_ENV_LOCATION(flash) = {
	355	.location = ENVL_FLASH,
ac358beb	356	ENV_NAME("Flash")
4415f1d1	357	#ifdef LOADENV
e5bce247	358	.load = env_flash_load,
4415f1d1 SG	359	#endif
4415f1d1 SG	360	#ifdef CMD_SAVEENV
e5bce247	361	.save = env_save_ptr(env_flash_save),
4415f1d1 SG	362	#endif
4415f1d1 SG	363	#ifdef INITENV
e5bce247	364	.init = env_flash_init,
4415f1d1 SG	365	#endif
4415f1d1 SG	366	};