[u-boot.git] / env / sf.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]>
 *
 * (C) Copyright 2008 Atmel Corporation
 */
#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

#ifndef CONFIG_SPL_BUILD
#define CMD_SAVEENV
#define INITENV
#endif

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

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

DECLARE_GLOBAL_DATA_PTR;

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,
				     CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
				     &new);
	if (ret) {
		set_default_env("spi_flash_probe_bus_cs() failed", 0);
		return ret;
	}

	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", 0);
			return -EIO;
		}
	}
#endif
	return 0;
}

#if defined(CONFIG_ENV_OFFSET_REDUND)
#ifdef CMD_SAVEENV
static int env_sf_save(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 -EIO;
	env_new.flags	= ACTIVE_FLAG;

	if (gd->env_valid == ENV_VALID) {
		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 = -ENOMEM;
			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 == ENV_REDUND ? ENV_VALID : ENV_REDUND;

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

 done:
	if (saved_buffer)
		free(saved_buffer);

	return ret;
}
#endif /* CMD_SAVEENV */

static int env_sf_load(void)
{
	int ret;
	int read1_fail, read2_fail;
	env_t *tmp_env1, *tmp_env2;

	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", 0);
		ret = -EIO;
		goto out;
	}

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

	read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
				    CONFIG_ENV_SIZE, tmp_env1);
	read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
				    CONFIG_ENV_SIZE, tmp_env2);

	ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
				read2_fail);

	spi_flash_free(env_flash);
	env_flash = NULL;
out:
	free(tmp_env1);
	free(tmp_env2);

	return ret;
}
#else
#ifdef CMD_SAVEENV
static int env_sf_save(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;
}
#endif /* CMD_SAVEENV */

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

	buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
	if (!buf) {
		set_default_env("malloc() failed", 0);
		return -EIO;
	}

	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", 0);
		goto err_read;
	}

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

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

	return ret;
}
#endif

#ifdef CONFIG_ENV_ADDR
__weak void *env_sf_get_env_addr(void)
{
	return (void *)CONFIG_ENV_ADDR;
}
#endif

#if defined(INITENV) && defined(CONFIG_ENV_ADDR)
static int env_sf_init(void)
{
	env_t *env_ptr = (env_t *)env_sf_get_env_addr();

	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
		gd->env_addr	= (ulong)&(env_ptr->data);
		gd->env_valid	= 1;
	} else {
		gd->env_addr = (ulong)&default_environment[0];
		gd->env_valid = 1;
	}

	return 0;
}
#endif

U_BOOT_ENV_LOCATION(sf) = {
	.location	= ENVL_SPI_FLASH,
	ENV_NAME("SPI Flash")
	.load		= env_sf_load,
#ifdef CMD_SAVEENV
	.save		= env_save_ptr(env_sf_save),
#endif
#if defined(INITENV) && defined(CONFIG_ENV_ADDR)
	.init		= env_sf_init,
#endif
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
8c66497e	2	/*
ea882baf	3	* (C) Copyright 2000-2010
8c66497e HS	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]>
	8	*
	9	* (C) Copyright 2008 Atmel Corporation
8c66497e HS	10	*/
8c66497e HS	11	#include <common.h>
9d922450	12	#include <dm.h>
8c66497e	13	#include <environment.h>
5b3375ac	14	#include <malloc.h>
843c9e87	15	#include <spi.h>
8c66497e	16	#include <spi_flash.h>
ea882baf WD	17	#include <search.h>
ea882baf WD	18	#include <errno.h>
19c31285	19	#include <dm/device-internal.h>
8c66497e	20
0e8d1586	21	#ifndef CONFIG_ENV_SPI_BUS
2e4e5ad4	22	# define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
8c66497e	23	#endif
0e8d1586	24	#ifndef CONFIG_ENV_SPI_CS
2e4e5ad4	25	# define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
8c66497e	26	#endif
0e8d1586	27	#ifndef CONFIG_ENV_SPI_MAX_HZ
2e4e5ad4	28	# define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
8c66497e	29	#endif
0e8d1586	30	#ifndef CONFIG_ENV_SPI_MODE
2e4e5ad4	31	# define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
8c66497e HS	32	#endif
8c66497e HS	33
4415f1d1 SG	34	#ifndef CONFIG_SPL_BUILD
4415f1d1 SG	35	#define CMD_SAVEENV
b500c92b	36	#define INITENV
4415f1d1 SG	37	#endif
4415f1d1 SG	38
7319bcaf	39	#ifdef CONFIG_ENV_OFFSET_REDUND
4415f1d1	40	#ifdef CMD_SAVEENV
eb58a7fc IG	41	static ulong env_offset = CONFIG_ENV_OFFSET;
eb58a7fc IG	42	static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
4415f1d1	43	#endif
7319bcaf	44
eb58a7fc IG	45	#define ACTIVE_FLAG 1
eb58a7fc IG	46	#define OBSOLETE_FLAG 0
a3110f01	47	#endif /* CONFIG_ENV_OFFSET_REDUND */
7319bcaf	48
8c66497e HS	49	DECLARE_GLOBAL_DATA_PTR;
8c66497e HS	50
8c66497e HS	51	static struct spi_flash *env_flash;
8c66497e HS	52
afa81a77	53	static int setup_flash_device(void)
7319bcaf	54	{
19c31285 GQ	55	#ifdef CONFIG_DM_SPI_FLASH
19c31285 GQ	56	struct udevice *new;
afa81a77	57	int ret;
19c31285	58
96907c0f	59	/* speed and mode will be read from DT */
19c31285	60	ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
25a17652 KP	61	CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
25a17652 KP	62	&new);
19c31285	63	if (ret) {
c5d548a9	64	set_default_env("spi_flash_probe_bus_cs() failed", 0);
c5951991	65	return ret;
19c31285 GQ	66	}
	67
	68	env_flash = dev_get_uclass_priv(new);
	69	#else
7319bcaf WW	70
7319bcaf WW	71	if (!env_flash) {
a3110f01 SB	72	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
	73	CONFIG_ENV_SPI_CS,
	74	CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
	75	if (!env_flash) {
c5d548a9	76	set_default_env("spi_flash_probe() failed", 0);
c5951991	77	return -EIO;
a3110f01	78	}
7319bcaf	79	}
19c31285	80	#endif
afa81a77 AF	81	return 0;
	82	}
	83
	84	#if defined(CONFIG_ENV_OFFSET_REDUND)
4415f1d1	85	#ifdef CMD_SAVEENV
e5bce247	86	static int env_sf_save(void)
afa81a77 AF	87	{
	88	env_t env_new;
	89	char *saved_buffer = NULL, flag = OBSOLETE_FLAG;
0b2e5bbe	90	u32 saved_size, saved_offset, sector;
afa81a77 AF	91	int ret;
	92
	93	ret = setup_flash_device();
	94	if (ret)
	95	return ret;
7319bcaf	96
7ce1526e MV	97	ret = env_export(&env_new);
7ce1526e MV	98	if (ret)
c5951991	99	return -EIO;
cd0f4fa1	100	env_new.flags = ACTIVE_FLAG;
ea882baf	101
203e94f6	102	if (gd->env_valid == ENV_VALID) {
a3110f01 SB	103	env_new_offset = CONFIG_ENV_OFFSET_REDUND;
	104	env_offset = CONFIG_ENV_OFFSET;
	105	} else {
	106	env_new_offset = CONFIG_ENV_OFFSET;
	107	env_offset = CONFIG_ENV_OFFSET_REDUND;
	108	}
	109
7319bcaf WW	110	/* Is the sector larger than the env (i.e. embedded) */
	111	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
	112	saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
	113	saved_offset = env_new_offset + CONFIG_ENV_SIZE;
7dd01744	114	saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
7319bcaf	115	if (!saved_buffer) {
c5951991	116	ret = -ENOMEM;
7319bcaf WW	117	goto done;
	118	}
	119	ret = spi_flash_read(env_flash, saved_offset,
	120	saved_size, saved_buffer);
	121	if (ret)
	122	goto done;
	123	}
	124
0b2e5bbe	125	sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
7319bcaf WW	126
	127	puts("Erasing SPI flash...");
	128	ret = spi_flash_erase(env_flash, env_new_offset,
	129	sector * CONFIG_ENV_SECT_SIZE);
	130	if (ret)
	131	goto done;
	132
	133	puts("Writing to SPI flash...");
7319bcaf	134
a3110f01	135	ret = spi_flash_write(env_flash, env_new_offset,
cd0f4fa1	136	CONFIG_ENV_SIZE, &env_new);
7319bcaf WW	137	if (ret)
	138	goto done;
	139
	140	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
	141	ret = spi_flash_write(env_flash, saved_offset,
	142	saved_size, saved_buffer);
	143	if (ret)
	144	goto done;
	145	}
	146
eb58a7fc	147	ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
cd0f4fa1	148	sizeof(env_new.flags), &flag);
a3110f01 SB	149	if (ret)
a3110f01 SB	150	goto done;
7319bcaf	151
7319bcaf WW	152	puts("done\n");
7319bcaf WW	153
203e94f6	154	gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
a3110f01	155
2dc55d9e	156	printf("Valid environment: %d\n", (int)gd->env_valid);
a3110f01	157
7319bcaf WW	158	done:
	159	if (saved_buffer)
	160	free(saved_buffer);
eb58a7fc	161
7319bcaf WW	162	return ret;
7319bcaf WW	163	}
4415f1d1	164	#endif /* CMD_SAVEENV */
7319bcaf	165
c5951991	166	static int env_sf_load(void)
7319bcaf WW	167	{
7319bcaf WW	168	int ret;
80719938 SG	169	int read1_fail, read2_fail;
80719938 SG	170	env_t tmp_env1, tmp_env2;
7319bcaf	171
7dd01744 RB	172	tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
	173	CONFIG_ENV_SIZE);
	174	tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
	175	CONFIG_ENV_SIZE);
ea882baf	176	if (!tmp_env1 \|\| !tmp_env2) {
c5d548a9	177	set_default_env("malloc() failed", 0);
c5951991	178	ret = -EIO;
2dc55d9e	179	goto out;
7319bcaf WW	180	}
7319bcaf WW	181
8fee8845 AF	182	ret = setup_flash_device();
8fee8845 AF	183	if (ret)
2dc55d9e	184	goto out;
7319bcaf	185
80719938 SG	186	read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
	187	CONFIG_ENV_SIZE, tmp_env1);
	188	read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
	189	CONFIG_ENV_SIZE, tmp_env2);
ea882baf	190
80719938 SG	191	ret = env_import_redund((char )tmp_env1, read1_fail, (char )tmp_env2,
80719938 SG	192	read2_fail);
7319bcaf	193
7319bcaf WW	194	spi_flash_free(env_flash);
7319bcaf WW	195	env_flash = NULL;
7319bcaf	196	out:
ea882baf WD	197	free(tmp_env1);
ea882baf WD	198	free(tmp_env2);
c5951991 SG	199
c5951991 SG	200	return ret;
7319bcaf WW	201	}
7319bcaf WW	202	#else
4415f1d1	203	#ifdef CMD_SAVEENV
e5bce247	204	static int env_sf_save(void)
8c66497e	205	{
0b2e5bbe	206	u32 saved_size, saved_offset, sector;
7ce1526e	207	char *saved_buffer = NULL;
eb58a7fc	208	int ret = 1;
cd0f4fa1	209	env_t env_new;
19c31285	210
afa81a77 AF	211	ret = setup_flash_device();
	212	if (ret)
	213	return ret;
8c66497e	214
5b3375ac MF	215	/* Is the sector larger than the env (i.e. embedded) */
	216	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
	217	saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
	218	saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
	219	saved_buffer = malloc(saved_size);
eb58a7fc	220	if (!saved_buffer)
5b3375ac	221	goto done;
eb58a7fc	222
a3110f01 SB	223	ret = spi_flash_read(env_flash, saved_offset,
a3110f01 SB	224	saved_size, saved_buffer);
5b3375ac MF	225	if (ret)
	226	goto done;
	227	}
	228
7ce1526e MV	229	ret = env_export(&env_new);
7ce1526e MV	230	if (ret)
a3110f01	231	goto done;
a3110f01	232
0b2e5bbe AF	233	sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
0b2e5bbe AF	234
8c66497e	235	puts("Erasing SPI flash...");
a3110f01 SB	236	ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
a3110f01 SB	237	sector * CONFIG_ENV_SECT_SIZE);
5b3375ac MF	238	if (ret)
5b3375ac MF	239	goto done;
8c66497e HS	240
8c66497e HS	241	puts("Writing to SPI flash...");
a3110f01	242	ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
cd0f4fa1	243	CONFIG_ENV_SIZE, &env_new);
5b3375ac MF	244	if (ret)
5b3375ac MF	245	goto done;
8c66497e	246
5b3375ac	247	if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
a3110f01 SB	248	ret = spi_flash_write(env_flash, saved_offset,
a3110f01 SB	249	saved_size, saved_buffer);
5b3375ac MF	250	if (ret)
	251	goto done;
	252	}
	253
	254	ret = 0;
8c66497e	255	puts("done\n");
5b3375ac MF	256
	257	done:
	258	if (saved_buffer)
	259	free(saved_buffer);
eb58a7fc	260
5b3375ac	261	return ret;
8c66497e	262	}
4415f1d1	263	#endif /* CMD_SAVEENV */
8c66497e	264
c5951991	265	static int env_sf_load(void)
8c66497e HS	266	{
8c66497e HS	267	int ret;
5a89fa92	268	char *buf = NULL;
8c66497e	269
7dd01744	270	buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
c041c60c	271	if (!buf) {
c5d548a9	272	set_default_env("malloc() failed", 0);
c5951991	273	return -EIO;
ea882baf	274	}
8c66497e	275
c041c60c AF	276	ret = setup_flash_device();
	277	if (ret)
	278	goto out;
	279
ea882baf WD	280	ret = spi_flash_read(env_flash,
	281	CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
	282	if (ret) {
c5d548a9	283	set_default_env("spi_flash_read() failed", 0);
c041c60c	284	goto err_read;
ea882baf	285	}
8c66497e	286
ea882baf	287	ret = env_import(buf, 1);
42a1820b	288	if (!ret)
203e94f6	289	gd->env_valid = ENV_VALID;
c041c60c AF	290
c041c60c AF	291	err_read:
8c66497e HS	292	spi_flash_free(env_flash);
8c66497e HS	293	env_flash = NULL;
c041c60c AF	294	out:
c041c60c AF	295	free(buf);
c5951991 SG	296
c5951991 SG	297	return ret;
8c66497e	298	}
7319bcaf	299	#endif
8c66497e	300
119c01c2 RB	301	#ifdef CONFIG_ENV_ADDR
	302	__weak void *env_sf_get_env_addr(void)
	303	{
	304	return (void *)CONFIG_ENV_ADDR;
	305	}
	306	#endif
	307
b500c92b AK	308	#if defined(INITENV) && defined(CONFIG_ENV_ADDR)
	309	static int env_sf_init(void)
	310	{
119c01c2	311	env_t env_ptr = (env_t )env_sf_get_env_addr();
b500c92b AK	312
	313	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
	314	gd->env_addr = (ulong)&(env_ptr->data);
	315	gd->env_valid = 1;
	316	} else {
	317	gd->env_addr = (ulong)&default_environment[0];
	318	gd->env_valid = 1;
	319	}
	320
	321	return 0;
	322	}
	323	#endif
	324
4415f1d1 SG	325	U_BOOT_ENV_LOCATION(sf) = {
4415f1d1 SG	326	.location = ENVL_SPI_FLASH,
ac358beb	327	ENV_NAME("SPI Flash")
e5bce247	328	.load = env_sf_load,
4415f1d1	329	#ifdef CMD_SAVEENV
e5bce247	330	.save = env_save_ptr(env_sf_save),
4415f1d1	331	#endif
b500c92b AK	332	#if defined(INITENV) && defined(CONFIG_ENV_ADDR)
	333	.init = env_sf_init,
	334	#endif
4415f1d1	335	};