[people/ms/u-boot.git] / common / env_sf.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>
 *
 * (C) Copyright 2008 Atmel Corporation
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#include <common.h>
#include <dm.h>
#include <environment.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include <search.h>
#include <errno.h>
#include <dm/device-internal.h>

#ifndef CONFIG_ENV_SPI_BUS
# define CONFIG_ENV_SPI_BUS	CONFIG_SF_DEFAULT_BUS
#endif
#ifndef CONFIG_ENV_SPI_CS
# define CONFIG_ENV_SPI_CS	CONFIG_SF_DEFAULT_CS
#endif
#ifndef CONFIG_ENV_SPI_MAX_HZ
# define CONFIG_ENV_SPI_MAX_HZ	CONFIG_SF_DEFAULT_SPEED
#endif
#ifndef CONFIG_ENV_SPI_MODE
# define CONFIG_ENV_SPI_MODE	CONFIG_SF_DEFAULT_MODE
#endif

#ifdef CONFIG_ENV_OFFSET_REDUND
static ulong env_offset		= CONFIG_ENV_OFFSET;
static ulong env_new_offset	= CONFIG_ENV_OFFSET_REDUND;

#define ACTIVE_FLAG	1
#define OBSOLETE_FLAG	0
#endif /* CONFIG_ENV_OFFSET_REDUND */

DECLARE_GLOBAL_DATA_PTR;

char *env_name_spec = "SPI Flash";

static struct spi_flash *env_flash;

static int setup_flash_device(void)
{
#ifdef CONFIG_DM_SPI_FLASH
	struct udevice *new;
	int	ret;

	/* speed and mode will be read from DT */
	ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
				     0, 0, &new);
	if (ret) {
		set_default_env("!spi_flash_probe_bus_cs() failed");
		return 1;
	}

	env_flash = dev_get_uclass_priv(new);
#else

	if (!env_flash) {
		env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
			CONFIG_ENV_SPI_CS,
			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
		if (!env_flash) {
			set_default_env("!spi_flash_probe() failed");
			return 1;
		}
	}
#endif
	return 0;
}

#if defined(CONFIG_ENV_OFFSET_REDUND)
int saveenv(void)
{
	env_t	env_new;
	char	*saved_buffer = NULL, flag = OBSOLETE_FLAG;
	u32	saved_size, saved_offset, sector;
	int	ret;

	ret = setup_flash_device();
	if (ret)
		return ret;

	ret = env_export(&env_new);
	if (ret)
		return ret;
	env_new.flags	= ACTIVE_FLAG;

	if (gd->env_valid == 1) {
		env_new_offset = CONFIG_ENV_OFFSET_REDUND;
		env_offset = CONFIG_ENV_OFFSET;
	} else {
		env_new_offset = CONFIG_ENV_OFFSET;
		env_offset = CONFIG_ENV_OFFSET_REDUND;
	}

	/* Is the sector larger than the env (i.e. embedded) */
	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
		saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
		saved_offset = env_new_offset + CONFIG_ENV_SIZE;
		saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
		if (!saved_buffer) {
			ret = 1;
			goto done;
		}
		ret = spi_flash_read(env_flash, saved_offset,
					saved_size, saved_buffer);
		if (ret)
			goto done;
	}

	sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);

	puts("Erasing SPI flash...");
	ret = spi_flash_erase(env_flash, env_new_offset,
				sector * CONFIG_ENV_SECT_SIZE);
	if (ret)
		goto done;

	puts("Writing to SPI flash...");

	ret = spi_flash_write(env_flash, env_new_offset,
		CONFIG_ENV_SIZE, &env_new);
	if (ret)
		goto done;

	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
		ret = spi_flash_write(env_flash, saved_offset,
					saved_size, saved_buffer);
		if (ret)
			goto done;
	}

	ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
				sizeof(env_new.flags), &flag);
	if (ret)
		goto done;

	puts("done\n");

	gd->env_valid = gd->env_valid == 2 ? 1 : 2;

	printf("Valid environment: %d\n", (int)gd->env_valid);

 done:
	if (saved_buffer)
		free(saved_buffer);

	return ret;
}

void env_relocate_spec(void)
{
	int ret;
	int crc1_ok = 0, crc2_ok = 0;
	env_t *tmp_env1 = NULL;
	env_t *tmp_env2 = NULL;
	env_t *ep = NULL;

	tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
			CONFIG_ENV_SIZE);
	tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
			CONFIG_ENV_SIZE);
	if (!tmp_env1 || !tmp_env2) {
		set_default_env("!malloc() failed");
		goto out;
	}

	ret = setup_flash_device();
	if (ret)
		goto out;

	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
				CONFIG_ENV_SIZE, tmp_env1);
	if (ret) {
		set_default_env("!spi_flash_read() failed");
		goto err_read;
	}

	if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
		crc1_ok = 1;

	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
				CONFIG_ENV_SIZE, tmp_env2);
	if (!ret) {
		if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
			crc2_ok = 1;
	}

	if (!crc1_ok && !crc2_ok) {
		set_default_env("!bad CRC");
		goto err_read;
	} else if (crc1_ok && !crc2_ok) {
		gd->env_valid = 1;
	} else if (!crc1_ok && crc2_ok) {
		gd->env_valid = 2;
	} else if (tmp_env1->flags == ACTIVE_FLAG &&
		   tmp_env2->flags == OBSOLETE_FLAG) {
		gd->env_valid = 1;
	} else if (tmp_env1->flags == OBSOLETE_FLAG &&
		   tmp_env2->flags == ACTIVE_FLAG) {
		gd->env_valid = 2;
	} else if (tmp_env1->flags == tmp_env2->flags) {
		gd->env_valid = 1;
	} else if (tmp_env1->flags == 0xFF) {
		gd->env_valid = 1;
	} else if (tmp_env2->flags == 0xFF) {
		gd->env_valid = 2;
	} else {
		/*
		 * this differs from code in env_flash.c, but I think a sane
		 * default path is desirable.
		 */
		gd->env_valid = 1;
	}

	if (gd->env_valid == 1)
		ep = tmp_env1;
	else
		ep = tmp_env2;

	ret = env_import((char *)ep, 0);
	if (!ret) {
		error("Cannot import environment: errno = %d\n", errno);
		set_default_env("!env_import failed");
	}

err_read:
	spi_flash_free(env_flash);
	env_flash = NULL;
out:
	free(tmp_env1);
	free(tmp_env2);
}
#else
int saveenv(void)
{
	u32	saved_size, saved_offset, sector;
	char	*saved_buffer = NULL;
	int	ret = 1;
	env_t	env_new;

	ret = setup_flash_device();
	if (ret)
		return ret;

	/* Is the sector larger than the env (i.e. embedded) */
	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
		saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
		saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
		saved_buffer = malloc(saved_size);
		if (!saved_buffer)
			goto done;

		ret = spi_flash_read(env_flash, saved_offset,
			saved_size, saved_buffer);
		if (ret)
			goto done;
	}

	ret = env_export(&env_new);
	if (ret)
		goto done;

	sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);

	puts("Erasing SPI flash...");
	ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
		sector * CONFIG_ENV_SECT_SIZE);
	if (ret)
		goto done;

	puts("Writing to SPI flash...");
	ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
		CONFIG_ENV_SIZE, &env_new);
	if (ret)
		goto done;

	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
		ret = spi_flash_write(env_flash, saved_offset,
			saved_size, saved_buffer);
		if (ret)
			goto done;
	}

	ret = 0;
	puts("done\n");

 done:
	if (saved_buffer)
		free(saved_buffer);

	return ret;
}

void env_relocate_spec(void)
{
	int ret;
	char *buf = NULL;

	buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
	if (!buf) {
		set_default_env("!malloc() failed");
		return;
	}

	ret = setup_flash_device();
	if (ret)
		goto out;

	ret = spi_flash_read(env_flash,
		CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
	if (ret) {
		set_default_env("!spi_flash_read() failed");
		goto err_read;
	}

	ret = env_import(buf, 1);
	if (ret)
		gd->env_valid = 1;

err_read:
	spi_flash_free(env_flash);
	env_flash = NULL;
out:
	free(buf);
}
#endif

int env_init(void)
{
	/* SPI flash isn't usable before relocation */
	gd->env_addr = (ulong)&default_environment[0];
	gd->env_valid = 1;

	return 0;
}
Commit	Line	Data
8c66497e	1	/*
ea882baf	2	* (C) Copyright 2000-2010
8c66497e HS	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	*
	8	* (C) Copyright 2008 Atmel Corporation
	9	*
402ba1e3	10	* SPDX-License-Identifier: GPL-2.0+
8c66497e HS	11	*/
8c66497e HS	12	#include <common.h>
9d922450	13	#include <dm.h>
8c66497e	14	#include <environment.h>
5b3375ac	15	#include <malloc.h>
843c9e87	16	#include <spi.h>
8c66497e	17	#include <spi_flash.h>
ea882baf WD	18	#include <search.h>
ea882baf WD	19	#include <errno.h>
19c31285	20	#include <dm/device-internal.h>
8c66497e	21
0e8d1586	22	#ifndef CONFIG_ENV_SPI_BUS
2e4e5ad4	23	# define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
8c66497e	24	#endif
0e8d1586	25	#ifndef CONFIG_ENV_SPI_CS
2e4e5ad4	26	# define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
8c66497e	27	#endif
0e8d1586	28	#ifndef CONFIG_ENV_SPI_MAX_HZ
2e4e5ad4	29	# define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
8c66497e	30	#endif
0e8d1586	31	#ifndef CONFIG_ENV_SPI_MODE
2e4e5ad4	32	# define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
8c66497e HS	33	#endif
8c66497e HS	34
7319bcaf	35	#ifdef CONFIG_ENV_OFFSET_REDUND
eb58a7fc IG	36	static ulong env_offset = CONFIG_ENV_OFFSET;
eb58a7fc IG	37	static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
7319bcaf	38
eb58a7fc IG	39	#define ACTIVE_FLAG 1
eb58a7fc IG	40	#define OBSOLETE_FLAG 0
a3110f01	41	#endif /* CONFIG_ENV_OFFSET_REDUND */
7319bcaf	42
8c66497e HS	43	DECLARE_GLOBAL_DATA_PTR;
8c66497e HS	44
eb58a7fc	45	char *env_name_spec = "SPI Flash";
8c66497e HS	46
	47	static struct spi_flash *env_flash;
	48
afa81a77	49	static int setup_flash_device(void)
7319bcaf	50	{
19c31285 GQ	51	#ifdef CONFIG_DM_SPI_FLASH
19c31285 GQ	52	struct udevice *new;
afa81a77	53	int ret;
19c31285	54
96907c0f	55	/* speed and mode will be read from DT */
19c31285	56	ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
96907c0f	57	0, 0, &new);
19c31285 GQ	58	if (ret) {
	59	set_default_env("!spi_flash_probe_bus_cs() failed");
	60	return 1;
	61	}
	62
	63	env_flash = dev_get_uclass_priv(new);
	64	#else
7319bcaf WW	65
7319bcaf WW	66	if (!env_flash) {
a3110f01 SB	67	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
	68	CONFIG_ENV_SPI_CS,
	69	CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
	70	if (!env_flash) {
	71	set_default_env("!spi_flash_probe() failed");
	72	return 1;
	73	}
7319bcaf	74	}
19c31285	75	#endif
afa81a77 AF	76	return 0;
	77	}
	78
	79	#if defined(CONFIG_ENV_OFFSET_REDUND)
	80	int saveenv(void)
	81	{
	82	env_t env_new;
	83	char *saved_buffer = NULL, flag = OBSOLETE_FLAG;
0b2e5bbe	84	u32 saved_size, saved_offset, sector;
afa81a77 AF	85	int ret;
	86
	87	ret = setup_flash_device();
	88	if (ret)
	89	return ret;
7319bcaf	90
7ce1526e MV	91	ret = env_export(&env_new);
	92	if (ret)
	93	return ret;
cd0f4fa1	94	env_new.flags = ACTIVE_FLAG;
ea882baf	95
a3110f01 SB	96	if (gd->env_valid == 1) {
	97	env_new_offset = CONFIG_ENV_OFFSET_REDUND;
	98	env_offset = CONFIG_ENV_OFFSET;
	99	} else {
	100	env_new_offset = CONFIG_ENV_OFFSET;
	101	env_offset = CONFIG_ENV_OFFSET_REDUND;
	102	}
	103
7319bcaf WW	104	/* Is the sector larger than the env (i.e. embedded) */
	105	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
	106	saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
	107	saved_offset = env_new_offset + CONFIG_ENV_SIZE;
7dd01744	108	saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
7319bcaf WW	109	if (!saved_buffer) {
	110	ret = 1;
	111	goto done;
	112	}
	113	ret = spi_flash_read(env_flash, saved_offset,
	114	saved_size, saved_buffer);
	115	if (ret)
	116	goto done;
	117	}
	118
0b2e5bbe	119	sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
7319bcaf WW	120
	121	puts("Erasing SPI flash...");
	122	ret = spi_flash_erase(env_flash, env_new_offset,
	123	sector * CONFIG_ENV_SECT_SIZE);
	124	if (ret)
	125	goto done;
	126
	127	puts("Writing to SPI flash...");
7319bcaf	128
a3110f01	129	ret = spi_flash_write(env_flash, env_new_offset,
cd0f4fa1	130	CONFIG_ENV_SIZE, &env_new);
7319bcaf WW	131	if (ret)
	132	goto done;
	133
	134	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
	135	ret = spi_flash_write(env_flash, saved_offset,
	136	saved_size, saved_buffer);
	137	if (ret)
	138	goto done;
	139	}
	140
eb58a7fc	141	ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
cd0f4fa1	142	sizeof(env_new.flags), &flag);
a3110f01 SB	143	if (ret)
a3110f01 SB	144	goto done;
7319bcaf	145
7319bcaf WW	146	puts("done\n");
7319bcaf WW	147
eb58a7fc	148	gd->env_valid = gd->env_valid == 2 ? 1 : 2;
a3110f01	149
2dc55d9e	150	printf("Valid environment: %d\n", (int)gd->env_valid);
a3110f01	151
7319bcaf WW	152	done:
	153	if (saved_buffer)
	154	free(saved_buffer);
eb58a7fc	155
7319bcaf WW	156	return ret;
	157	}
	158
	159	void env_relocate_spec(void)
	160	{
	161	int ret;
	162	int crc1_ok = 0, crc2_ok = 0;
	163	env_t *tmp_env1 = NULL;
	164	env_t *tmp_env2 = NULL;
a3110f01	165	env_t *ep = NULL;
7319bcaf	166
7dd01744 RB	167	tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
	168	CONFIG_ENV_SIZE);
	169	tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
	170	CONFIG_ENV_SIZE);
ea882baf	171	if (!tmp_env1 \|\| !tmp_env2) {
ea882baf	172	set_default_env("!malloc() failed");
2dc55d9e	173	goto out;
7319bcaf WW	174	}
7319bcaf WW	175
8fee8845 AF	176	ret = setup_flash_device();
8fee8845 AF	177	if (ret)
2dc55d9e	178	goto out;
7319bcaf WW	179
	180	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
	181	CONFIG_ENV_SIZE, tmp_env1);
ea882baf WD	182	if (ret) {
ea882baf WD	183	set_default_env("!spi_flash_read() failed");
7319bcaf	184	goto err_read;
ea882baf	185	}
7319bcaf WW	186
	187	if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
	188	crc1_ok = 1;
7319bcaf WW	189
	190	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
	191	CONFIG_ENV_SIZE, tmp_env2);
	192	if (!ret) {
	193	if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
	194	crc2_ok = 1;
7319bcaf WW	195	}
7319bcaf WW	196
a3110f01	197	if (!crc1_ok && !crc2_ok) {
a3110f01	198	set_default_env("!bad CRC");
2dc55d9e	199	goto err_read;
a3110f01	200	} else if (crc1_ok && !crc2_ok) {
7319bcaf	201	gd->env_valid = 1;
7319bcaf	202	} else if (!crc1_ok && crc2_ok) {
2dc55d9e	203	gd->env_valid = 2;
	204	} else if (tmp_env1->flags == ACTIVE_FLAG &&
	205	tmp_env2->flags == OBSOLETE_FLAG) {
7319bcaf	206	gd->env_valid = 1;
2dc55d9e	207	} else if (tmp_env1->flags == OBSOLETE_FLAG &&
2dc55d9e	208	tmp_env2->flags == ACTIVE_FLAG) {
a3110f01	209	gd->env_valid = 2;
2dc55d9e	210	} else if (tmp_env1->flags == tmp_env2->flags) {
5e8397dd	211	gd->env_valid = 1;
2dc55d9e	212	} else if (tmp_env1->flags == 0xFF) {
5e8397dd MS	213	gd->env_valid = 1;
5e8397dd MS	214	} else if (tmp_env2->flags == 0xFF) {
7319bcaf	215	gd->env_valid = 2;
7319bcaf WW	216	} else {
	217	/*
	218	* this differs from code in env_flash.c, but I think a sane
	219	* default path is desirable.
	220	*/
5e8397dd	221	gd->env_valid = 1;
7319bcaf	222	}
ea882baf	223
a3110f01 SB	224	if (gd->env_valid == 1)
	225	ep = tmp_env1;
	226	else
	227	ep = tmp_env2;
	228
	229	ret = env_import((char *)ep, 0);
	230	if (!ret) {
	231	error("Cannot import environment: errno = %d\n", errno);
9a5d993e	232	set_default_env("!env_import failed");
7319bcaf	233	}
7319bcaf WW	234
	235	err_read:
	236	spi_flash_free(env_flash);
	237	env_flash = NULL;
7319bcaf	238	out:
ea882baf WD	239	free(tmp_env1);
ea882baf WD	240	free(tmp_env2);
7319bcaf WW	241	}
7319bcaf WW	242	#else
8c66497e HS	243	int saveenv(void)
8c66497e HS	244	{
0b2e5bbe	245	u32 saved_size, saved_offset, sector;
7ce1526e	246	char *saved_buffer = NULL;
eb58a7fc	247	int ret = 1;
cd0f4fa1	248	env_t env_new;
19c31285	249
afa81a77 AF	250	ret = setup_flash_device();
	251	if (ret)
	252	return ret;
8c66497e	253
5b3375ac MF	254	/* Is the sector larger than the env (i.e. embedded) */
	255	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
	256	saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
	257	saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
	258	saved_buffer = malloc(saved_size);
eb58a7fc	259	if (!saved_buffer)
5b3375ac	260	goto done;
eb58a7fc	261
a3110f01 SB	262	ret = spi_flash_read(env_flash, saved_offset,
a3110f01 SB	263	saved_size, saved_buffer);
5b3375ac MF	264	if (ret)
	265	goto done;
	266	}
	267
7ce1526e MV	268	ret = env_export(&env_new);
7ce1526e MV	269	if (ret)
a3110f01	270	goto done;
a3110f01	271
0b2e5bbe AF	272	sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
0b2e5bbe AF	273
8c66497e	274	puts("Erasing SPI flash...");
a3110f01 SB	275	ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
a3110f01 SB	276	sector * CONFIG_ENV_SECT_SIZE);
5b3375ac MF	277	if (ret)
5b3375ac MF	278	goto done;
8c66497e HS	279
8c66497e HS	280	puts("Writing to SPI flash...");
a3110f01	281	ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
cd0f4fa1	282	CONFIG_ENV_SIZE, &env_new);
5b3375ac MF	283	if (ret)
5b3375ac MF	284	goto done;
8c66497e	285
5b3375ac	286	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
a3110f01 SB	287	ret = spi_flash_write(env_flash, saved_offset,
a3110f01 SB	288	saved_size, saved_buffer);
5b3375ac MF	289	if (ret)
	290	goto done;
	291	}
	292
	293	ret = 0;
8c66497e	294	puts("done\n");
5b3375ac MF	295
	296	done:
	297	if (saved_buffer)
	298	free(saved_buffer);
eb58a7fc	299
5b3375ac	300	return ret;
8c66497e HS	301	}
	302
	303	void env_relocate_spec(void)
	304	{
	305	int ret;
5a89fa92	306	char *buf = NULL;
8c66497e	307
7dd01744	308	buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
c041c60c AF	309	if (!buf) {
c041c60c AF	310	set_default_env("!malloc() failed");
ea882baf WD	311	return;
ea882baf WD	312	}
8c66497e	313
c041c60c AF	314	ret = setup_flash_device();
	315	if (ret)
	316	goto out;
	317
ea882baf WD	318	ret = spi_flash_read(env_flash,
	319	CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
	320	if (ret) {
	321	set_default_env("!spi_flash_read() failed");
c041c60c	322	goto err_read;
ea882baf	323	}
8c66497e	324
ea882baf	325	ret = env_import(buf, 1);
ea882baf WD	326	if (ret)
ea882baf WD	327	gd->env_valid = 1;
c041c60c AF	328
c041c60c AF	329	err_read:
8c66497e HS	330	spi_flash_free(env_flash);
8c66497e HS	331	env_flash = NULL;
c041c60c AF	332	out:
c041c60c AF	333	free(buf);
8c66497e	334	}
7319bcaf	335	#endif
8c66497e HS	336
	337	int env_init(void)
	338	{
	339	/* SPI flash isn't usable before relocation */
	340	gd->env_addr = (ulong)&default_environment[0];
	341	gd->env_valid = 1;
	342
	343	return 0;
	344	}