[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 <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(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

#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, 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
c609719b	12	#include <command.h>
db197010	13	#include <env.h>
f3998fdc	14	#include <env_internal.h>
f7ae49fc	15	#include <log.h>
401d1c4f	16	#include <asm/global_data.h>
c609719b	17	#include <linux/stddef.h>
47cd00fa	18	#include <malloc.h>
ea882baf WD	19	#include <search.h>
ea882baf WD	20	#include <errno.h>
3db71108	21	#include <u-boot/crc.h>
c609719b	22
d87080b7 WD	23	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	24
4415f1d1 SG	25	#ifndef CONFIG_SPL_BUILD
4415f1d1 SG	26	# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
17ead040	27	# include <flash.h>
4415f1d1 SG	28	# define CMD_SAVEENV
	29	# elif defined(CONFIG_ENV_ADDR_REDUND)
	30	# error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
	31	# endif
c609719b WD	32	#endif
c609719b WD	33
4415f1d1 SG	34	/* TODO(sjg@chromium.org): Figure out all these special cases */
	35	#if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
	36	!defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
	37	!defined(CONFIG_TARGET_EDMINIV2)) \|\| \
	38	!defined(CONFIG_SPL_BUILD)
	39	#define LOADENV
	40	#endif
	41
	42	#if !defined(CONFIG_TARGET_X600) \|\| !defined(CONFIG_SPL_BUILD)
	43	#define INITENV
	44	#endif
	45
b6cba297 RB	46	#if defined(CONFIG_ENV_ADDR_REDUND) && defined(CMD_SAVEENV) \|\| \
b6cba297 RB	47	!defined(CONFIG_ENV_ADDR_REDUND) && defined(INITENV)
c609719b	48	#ifdef ENV_IS_EMBEDDED
be54ec16	49	static env_t *env_ptr = &embedded_environment;
c609719b WD	50	#else /* ! ENV_IS_EMBEDDED */
c609719b WD	51
b6cba297	52	static env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
c609719b	53	#endif /* ENV_IS_EMBEDDED */
b6cba297 RB	54	#endif
b6cba297 RB	55	static __maybe_unused env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b	56
ea882baf	57	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
e5bce247 SG	58	static ulong __maybe_unused end_addr =
e5bce247 SG	59	CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
ea882baf	60
0e8d1586	61	#ifdef CONFIG_ENV_ADDR_REDUND
e5bce247 SG	62
e5bce247 SG	63	static env_t __maybe_unused flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	64
ea882baf	65	/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
e5bce247 SG	66	static ulong __maybe_unused end_addr_new =
e5bce247 SG	67	CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
0e8d1586	68	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	69
0e8d1586	70	#ifdef CONFIG_ENV_ADDR_REDUND
4415f1d1	71	#ifdef INITENV
e5bce247	72	static int env_flash_init(void)
c609719b	73	{
8ed96046	74	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	75
	76	uchar flag1 = flash_addr->flags;
	77	uchar flag2 = flash_addr_new->flags;
	78
c609719b WD	79	ulong addr1 = (ulong)&(flash_addr->data);
	80	ulong addr2 = (ulong)&(flash_addr_new->data);
	81
82b54b97 IG	82	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	83	crc2_ok =
	84	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
	85
	86	if (crc1_ok && !crc2_ok) {
	87	gd->env_addr = addr1;
203e94f6	88	gd->env_valid = ENV_VALID;
82b54b97 IG	89	} else if (!crc1_ok && crc2_ok) {
82b54b97 IG	90	gd->env_addr = addr2;
203e94f6	91	gd->env_valid = ENV_VALID;
82b54b97	92	} else if (!crc1_ok && !crc2_ok) {
2d7cb5b4	93	gd->env_valid = ENV_INVALID;
d3716dd6 SG	94	} else if (flag1 == ENV_REDUND_ACTIVE &&
d3716dd6 SG	95	flag2 == ENV_REDUND_OBSOLETE) {
82b54b97	96	gd->env_addr = addr1;
203e94f6	97	gd->env_valid = ENV_VALID;
d3716dd6 SG	98	} else if (flag1 == ENV_REDUND_OBSOLETE &&
d3716dd6 SG	99	flag2 == ENV_REDUND_ACTIVE) {
82b54b97	100	gd->env_addr = addr2;
203e94f6	101	gd->env_valid = ENV_VALID;
c3f9d493	102	} else if (flag1 == flag2) {
82b54b97	103	gd->env_addr = addr1;
203e94f6	104	gd->env_valid = ENV_REDUND;
c3f9d493	105	} else if (flag1 == 0xFF) {
82b54b97	106	gd->env_addr = addr1;
203e94f6	107	gd->env_valid = ENV_REDUND;
c3f9d493	108	} else if (flag2 == 0xFF) {
82b54b97	109	gd->env_addr = addr2;
203e94f6	110	gd->env_valid = ENV_REDUND;
c609719b WD	111	}
c609719b WD	112
ea882baf	113	return 0;
c609719b	114	}
4415f1d1	115	#endif
c609719b WD	116
c609719b WD	117	#ifdef CMD_SAVEENV
e5bce247	118	static int env_flash_save(void)
c609719b	119	{
ea882baf	120	env_t env_new;
7ce1526e	121	char *saved_data = NULL;
d3716dd6	122	char flag = ENV_REDUND_OBSOLETE, new_flag = ENV_REDUND_ACTIVE;
82b54b97	123	int rc = 1;
0e8d1586	124	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	125	ulong up_data = 0;
500545cc	126	#endif
c609719b	127
82b54b97	128	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	129
82b54b97	130	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
ea882baf	131	goto done;
c609719b	132
ea882baf	133	debug("Protect off %08lX ... %08lX\n",
c609719b WD	134	(ulong)flash_addr_new, end_addr_new);
c609719b WD	135
82b54b97	136	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
ea882baf	137	goto done;
ea882baf	138
7ce1526e MV	139	rc = env_export(&env_new);
	140	if (rc)
	141	return rc;
82b54b97	142	env_new.flags = new_flag;
c609719b	143
0e8d1586	144	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
82b54b97	145	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
ea882baf	146	debug("Data to save 0x%lX\n", up_data);
47cd00fa	147	if (up_data) {
82b54b97 IG	148	saved_data = malloc(up_data);
82b54b97 IG	149	if (saved_data == NULL) {
8bde7f77	150	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	151	up_data);
ea882baf	152	goto done;
47cd00fa	153	}
8bde7f77	154	memcpy(saved_data,
82b54b97 IG	155	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
82b54b97 IG	156	up_data);
ea882baf WD	157	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	158	(long)flash_addr_new + CONFIG_ENV_SIZE,
	159	up_data, saved_data);
47cd00fa WD	160	}
47cd00fa WD	161	#endif
ea882baf	162	puts("Erasing Flash...");
82b54b97	163	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
c609719b	164
82b54b97	165	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
ea882baf	166	goto done;
c609719b	167
ea882baf WD	168	puts("Writing to Flash... ");
ea882baf WD	169	debug(" %08lX ... %08lX ...",
c609719b	170	(ulong)&(flash_addr_new->data),
82b54b97 IG	171	sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	172	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
	173	sizeof(env_new));
	174	if (rc)
	175	goto perror;
	176
	177	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
	178	sizeof(flash_addr->flags));
	179	if (rc)
	180	goto perror;
c609719b	181
0e8d1586	182	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	183	if (up_data) { /* restore the rest of sector */
ea882baf WD	184	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	185	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	186	if (flash_write(saved_data,
0e8d1586	187	(long)flash_addr_new + CONFIG_ENV_SIZE,
82b54b97 IG	188	up_data))
82b54b97 IG	189	goto perror;
47cd00fa WD	190	}
47cd00fa WD	191	#endif
ea882baf WD	192	puts("done\n");
ea882baf WD	193
c609719b	194	{
82b54b97	195	env_t *etmp = flash_addr;
c609719b WD	196	ulong ltmp = end_addr;
	197
	198	flash_addr = flash_addr_new;
	199	flash_addr_new = etmp;
	200
	201	end_addr = end_addr_new;
	202	end_addr_new = ltmp;
	203	}
	204
	205	rc = 0;
82b54b97 IG	206	goto done;
	207	perror:
	208	flash_perror(rc);
ea882baf	209	done:
28ab12ad	210	free(saved_data);
c609719b	211	/* try to re-protect */
82b54b97 IG	212	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	213	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	214
	215	return rc;
	216	}
	217	#endif /* CMD_SAVEENV */
	218
0e8d1586	219	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	220
4415f1d1	221	#ifdef INITENV
e5bce247	222	static int env_flash_init(void)
c609719b	223	{
c609719b	224	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97	225	gd->env_addr = (ulong)&(env_ptr->data);
203e94f6	226	gd->env_valid = ENV_VALID;
82b54b97	227	return 0;
c609719b	228	}
9bb8b209	229
ee483902	230	gd->env_valid = ENV_INVALID;
ea882baf	231	return 0;
c609719b	232	}
4415f1d1	233	#endif
c609719b WD	234
c609719b WD	235	#ifdef CMD_SAVEENV
e5bce247	236	static int env_flash_save(void)
c609719b	237	{
ea882baf	238	env_t env_new;
ea882baf	239	int rc = 1;
3fa1981e	240	char *saved_data = NULL;
ea882baf WD	241	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	242	ulong up_data = 0;
c609719b	243
82b54b97	244	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	245	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	246	if (up_data) {
82b54b97 IG	247	saved_data = malloc(up_data);
82b54b97 IG	248	if (saved_data == NULL) {
ea882baf WD	249	printf("Unable to save the rest of sector (%ld)\n",
	250	up_data);
	251	goto done;
	252	}
	253	memcpy(saved_data,
	254	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	255	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	256	(ulong)flash_addr + CONFIG_ENV_SIZE,
	257	up_data,
	258	(ulong)saved_data);
	259	}
0e8d1586	260	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	261
82b54b97	262	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	263
ea882baf WD	264	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	265	goto done;
c609719b	266
7ce1526e MV	267	rc = env_export(&env_new);
7ce1526e MV	268	if (rc)
ea882baf	269	goto done;
c609719b	270
ea882baf WD	271	puts("Erasing Flash...");
	272	if (flash_sect_erase((long)flash_addr, end_addr))
	273	goto done;
c609719b	274
ea882baf WD	275	puts("Writing to Flash... ");
ea882baf WD	276	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	277	if (rc != 0)
	278	goto perror;
	279
ea882baf WD	280	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	281	if (up_data) { /* restore the rest of sector */
	282	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	283	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	284	if (flash_write(saved_data,
	285	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	286	up_data))
82b54b97 IG	287	goto perror;
ea882baf WD	288	}
	289	#endif
	290	puts("done\n");
	291	rc = 0;
82b54b97 IG	292	goto done;
	293	perror:
	294	flash_perror(rc);
ea882baf	295	done:
28ab12ad	296	free(saved_data);
c609719b	297	/* try to re-protect */
82b54b97	298	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	299	return rc;
c609719b	300	}
c609719b WD	301	#endif /* CMD_SAVEENV */
c609719b WD	302
0e8d1586	303	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	304
e5bce247	305	#ifdef LOADENV
c5951991	306	static int env_flash_load(void)
c609719b	307	{
0e8d1586	308	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	309	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	310	env_t *etmp = flash_addr;
c609719b WD	311	ulong ltmp = end_addr;
	312
	313	flash_addr = flash_addr_new;
	314	flash_addr_new = etmp;
	315
	316	end_addr = end_addr_new;
	317	end_addr_new = ltmp;
	318	}
	319
d3716dd6	320	if (flash_addr_new->flags != ENV_REDUND_OBSOLETE &&
82b54b97	321	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
d3716dd6	322	char flag = ENV_REDUND_OBSOLETE;
c3f9d493	323
203e94f6	324	gd->env_valid = ENV_REDUND;
ea882baf	325	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	326	flash_write(&flag,
8bde7f77 WD	327	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	328	sizeof(flash_addr_new->flags));
ea882baf	329	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	330	}
c609719b WD	331
d3716dd6 SG	332	if (flash_addr->flags != ENV_REDUND_ACTIVE &&
	333	(flash_addr->flags & ENV_REDUND_ACTIVE) == ENV_REDUND_ACTIVE) {
	334	char flag = ENV_REDUND_ACTIVE;
c3f9d493	335
203e94f6	336	gd->env_valid = ENV_REDUND;
ea882baf	337	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	338	flash_write(&flag,
8bde7f77 WD	339	(ulong)&(flash_addr->flags),
8bde7f77 WD	340	sizeof(flash_addr->flags));
ea882baf	341	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	342	}
c609719b WD	343
203e94f6	344	if (gd->env_valid == ENV_REDUND)
82b54b97 IG	345	puts("*** Warning - some problems detected "
82b54b97 IG	346	"reading environment; recovered successfully\n\n");
0e8d1586	347	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf	348
890feeca	349	return env_import((char *)flash_addr, 1, H_EXTERNAL);
c609719b	350	}
e5bce247	351	#endif /* LOADENV */
4415f1d1 SG	352
	353	U_BOOT_ENV_LOCATION(flash) = {
	354	.location = ENVL_FLASH,
ac358beb	355	ENV_NAME("Flash")
4415f1d1	356	#ifdef LOADENV
e5bce247	357	.load = env_flash_load,
4415f1d1 SG	358	#endif
4415f1d1 SG	359	#ifdef CMD_SAVEENV
e5bce247	360	.save = env_save_ptr(env_flash_save),
4415f1d1 SG	361	#endif
4415f1d1 SG	362	#ifdef INITENV
e5bce247	363	.init = env_flash_init,
4415f1d1 SG	364	#endif
4415f1d1 SG	365	};