[people/ms/u-boot.git] / env / mmc.c

/*
 * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/* #define DEBUG */

#include <common.h>

#include <command.h>
#include <environment.h>
#include <fdtdec.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <memalign.h>
#include <mmc.h>
#include <part.h>
#include <search.h>
#include <errno.h>

#define __STR(X) #X
#define STR(X) __STR(X)

#if defined(CONFIG_ENV_SIZE_REDUND) &&  \
	(CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
#endif

DECLARE_GLOBAL_DATA_PTR;

#if !defined(CONFIG_ENV_OFFSET)
#define CONFIG_ENV_OFFSET 0
#endif

#if CONFIG_IS_ENABLED(OF_CONTROL)
static inline int mmc_offset_try_partition(const char *str, s64 *val)
{
	disk_partition_t info;
	struct blk_desc *desc;
	int len, i, ret;

	ret = blk_get_device_by_str("mmc", STR(CONFIG_SYS_MMC_ENV_DEV), &desc);
	if (ret < 0)
		return (ret);

	for (i = 1;;i++) {
		ret = part_get_info(desc, i, &info);
		if (ret < 0)
			return ret;

		if (!strncmp((const char *)info.name, str, sizeof(str)))
			break;
	}

	/* round up to info.blksz */
	len = (CONFIG_ENV_SIZE + info.blksz - 1) & ~(info.blksz - 1);

	/* use the top of the partion for the environment */
	*val = (info.start + info.size - 1) - len / info.blksz;

	return 0;
}

static inline s64 mmc_offset(int copy)
{
	const struct {
		const char *offset_redund;
		const char *partition;
		const char *offset;
	} dt_prop = {
		.offset_redund = "u-boot,mmc-env-offset-redundant",
		.partition = "u-boot,mmc-env-partition",
		.offset = "u-boot,mmc-env-offset",
	};
	s64 val = 0, defvalue;
	const char *propname;
	const char *str;
	int err;

	/* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
	str = fdtdec_get_config_string(gd->fdt_blob, dt_prop.partition);
	if (str) {
		/* try to place the environment at end of the partition */
		err = mmc_offset_try_partition(str, &val);
		if (!err)
			return val;
	}

	defvalue = CONFIG_ENV_OFFSET;
	propname = dt_prop.offset;

#if defined(CONFIG_ENV_OFFSET_REDUND)
	if (copy) {
		defvalue = CONFIG_ENV_OFFSET_REDUND;
		propname = dt_prop.offset_redund;
	}
#endif
	return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
}
#else
static inline s64 mmc_offset(int copy)
{
	s64 offset = CONFIG_ENV_OFFSET;

#if defined(CONFIG_ENV_OFFSET_REDUND)
	if (copy)
		offset = CONFIG_ENV_OFFSET_REDUND;
#endif
	return offset;
}
#endif

__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
{
	s64 offset = mmc_offset(copy);

	if (offset < 0)
		offset += mmc->capacity;

	*env_addr = offset;

	return 0;
}

__weak int mmc_get_env_dev(void)
{
	return CONFIG_SYS_MMC_ENV_DEV;
}

#ifdef CONFIG_SYS_MMC_ENV_PART
__weak uint mmc_get_env_part(struct mmc *mmc)
{
	return CONFIG_SYS_MMC_ENV_PART;
}

static unsigned char env_mmc_orig_hwpart;

static int mmc_set_env_part(struct mmc *mmc)
{
	uint part = mmc_get_env_part(mmc);
	int dev = mmc_get_env_dev();
	int ret = 0;

	env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
	ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
	if (ret)
		puts("MMC partition switch failed\n");

	return ret;
}
#else
static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
#endif

static const char *init_mmc_for_env(struct mmc *mmc)
{
	if (!mmc)
		return "!No MMC card found";

#ifdef CONFIG_BLK
	struct udevice *dev;

	if (blk_get_from_parent(mmc->dev, &dev))
		return "!No block device";
#else
	if (mmc_init(mmc))
		return "!MMC init failed";
#endif
	if (mmc_set_env_part(mmc))
		return "!MMC partition switch failed";

	return NULL;
}

static void fini_mmc_for_env(struct mmc *mmc)
{
#ifdef CONFIG_SYS_MMC_ENV_PART
	int dev = mmc_get_env_dev();

	blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
#endif
}

#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
static inline int write_env(struct mmc *mmc, unsigned long size,
			    unsigned long offset, const void *buffer)
{
	uint blk_start, blk_cnt, n;
	struct blk_desc *desc = mmc_get_blk_desc(mmc);

	blk_start	= ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
	blk_cnt		= ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;

	n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);

	return (n == blk_cnt) ? 0 : -1;
}

static int env_mmc_save(void)
{
	ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
	int dev = mmc_get_env_dev();
	struct mmc *mmc = find_mmc_device(dev);
	u32	offset;
	int	ret, copy = 0;
	const char *errmsg;

	errmsg = init_mmc_for_env(mmc);
	if (errmsg) {
		printf("%s\n", errmsg);
		return 1;
	}

	ret = env_export(env_new);
	if (ret)
		goto fini;

#ifdef CONFIG_ENV_OFFSET_REDUND
	if (gd->env_valid == ENV_VALID)
		copy = 1;
#endif

	if (mmc_get_env_addr(mmc, copy, &offset)) {
		ret = 1;
		goto fini;
	}

	printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
	if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
		puts("failed\n");
		ret = 1;
		goto fini;
	}

	ret = 0;

#ifdef CONFIG_ENV_OFFSET_REDUND
	gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
#endif

fini:
	fini_mmc_for_env(mmc);
	return ret;
}
#endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */

static inline int read_env(struct mmc *mmc, unsigned long size,
			   unsigned long offset, const void *buffer)
{
	uint blk_start, blk_cnt, n;
	struct blk_desc *desc = mmc_get_blk_desc(mmc);

	blk_start	= ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
	blk_cnt		= ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;

	n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);

	return (n == blk_cnt) ? 0 : -1;
}

#ifdef CONFIG_ENV_OFFSET_REDUND
static int env_mmc_load(void)
{
#if !defined(ENV_IS_EMBEDDED)
	struct mmc *mmc;
	u32 offset1, offset2;
	int read1_fail = 0, read2_fail = 0;
	int ret;
	int dev = mmc_get_env_dev();
	const char *errmsg = NULL;

	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);

	mmc = find_mmc_device(dev);

	errmsg = init_mmc_for_env(mmc);
	if (errmsg) {
		ret = -EIO;
		goto err;
	}

	if (mmc_get_env_addr(mmc, 0, &offset1) ||
	    mmc_get_env_addr(mmc, 1, &offset2)) {
		ret = -EIO;
		goto fini;
	}

	read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
	read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);

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

fini:
	fini_mmc_for_env(mmc);
err:
	if (ret)
		set_default_env(errmsg);

#endif
	return ret;
}
#else /* ! CONFIG_ENV_OFFSET_REDUND */
static int env_mmc_load(void)
{
#if !defined(ENV_IS_EMBEDDED)
	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
	struct mmc *mmc;
	u32 offset;
	int ret;
	int dev = mmc_get_env_dev();
	const char *errmsg;

	mmc = find_mmc_device(dev);

	errmsg = init_mmc_for_env(mmc);
	if (errmsg) {
		ret = -EIO;
		goto err;
	}

	if (mmc_get_env_addr(mmc, 0, &offset)) {
		ret = -EIO;
		goto fini;
	}

	if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
		errmsg = "!read failed";
		ret = -EIO;
		goto fini;
	}

	ret = env_import(buf, 1);

fini:
	fini_mmc_for_env(mmc);
err:
	if (ret)
		set_default_env(errmsg);
#endif
	return ret;
}
#endif /* CONFIG_ENV_OFFSET_REDUND */

U_BOOT_ENV_LOCATION(mmc) = {
	.location	= ENVL_MMC,
	ENV_NAME("MMC")
	.load		= env_mmc_load,
#ifndef CONFIG_SPL_BUILD
	.save		= env_save_ptr(env_mmc_save),
#endif
};
Commit	Line	Data
a8060359	1	/*
97039ab9	2	* (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
a8060359	3	*
3765b3e7	4	* SPDX-License-Identifier: GPL-2.0+
a8060359 TL	5	*/
	6
	7	/* #define DEBUG */
	8
	9	#include <common.h>
	10
	11	#include <command.h>
	12	#include <environment.h>
f8b8a554	13	#include <fdtdec.h>
a8060359 TL	14	#include <linux/stddef.h>
a8060359 TL	15	#include <malloc.h>
cf92e05c	16	#include <memalign.h>
a8060359	17	#include <mmc.h>
c9e87ba6	18	#include <part.h>
6d1d51b3	19	#include <search.h>
e79f4839	20	#include <errno.h>
a8060359	21
c9e87ba6 JRO	22	#define __STR(X) #X
	23	#define STR(X) __STR(X)
	24
d196bd88 MH	25	#if defined(CONFIG_ENV_SIZE_REDUND) && \
	26	(CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
	27	#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
	28	#endif
	29
a8060359 TL	30	DECLARE_GLOBAL_DATA_PTR;
a8060359 TL	31
97039ab9 MH	32	#if !defined(CONFIG_ENV_OFFSET)
	33	#define CONFIG_ENV_OFFSET 0
	34	#endif
	35
f8b8a554	36	#if CONFIG_IS_ENABLED(OF_CONTROL)
c9e87ba6 JRO	37	static inline int mmc_offset_try_partition(const char str, s64 val)
	38	{
	39	disk_partition_t info;
	40	struct blk_desc *desc;
	41	int len, i, ret;
	42
	43	ret = blk_get_device_by_str("mmc", STR(CONFIG_SYS_MMC_ENV_DEV), &desc);
	44	if (ret < 0)
	45	return (ret);
	46
	47	for (i = 1;;i++) {
	48	ret = part_get_info(desc, i, &info);
	49	if (ret < 0)
	50	return ret;
	51
	52	if (!strncmp((const char *)info.name, str, sizeof(str)))
	53	break;
	54	}
	55
	56	/* round up to info.blksz */
	57	len = (CONFIG_ENV_SIZE + info.blksz - 1) & ~(info.blksz - 1);
	58
	59	/* use the top of the partion for the environment */
	60	*val = (info.start + info.size - 1) - len / info.blksz;
	61
	62	return 0;
	63	}
	64
f8b8a554 PT	65	static inline s64 mmc_offset(int copy)
f8b8a554 PT	66	{
c9e87ba6 JRO	67	const struct {
	68	const char *offset_redund;
	69	const char *partition;
	70	const char *offset;
	71	} dt_prop = {
	72	.offset_redund = "u-boot,mmc-env-offset-redundant",
	73	.partition = "u-boot,mmc-env-partition",
	74	.offset = "u-boot,mmc-env-offset",
	75	};
fd374665	76	s64 val = 0, defvalue;
c9e87ba6 JRO	77	const char *propname;
	78	const char *str;
	79	int err;
	80
	81	/* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
	82	str = fdtdec_get_config_string(gd->fdt_blob, dt_prop.partition);
	83	if (str) {
	84	/* try to place the environment at end of the partition */
	85	err = mmc_offset_try_partition(str, &val);
	86	if (!err)
	87	return val;
	88	}
	89
	90	defvalue = CONFIG_ENV_OFFSET;
	91	propname = dt_prop.offset;
f8b8a554 PT	92
	93	#if defined(CONFIG_ENV_OFFSET_REDUND)
	94	if (copy) {
f8b8a554	95	defvalue = CONFIG_ENV_OFFSET_REDUND;
c9e87ba6	96	propname = dt_prop.offset_redund;
f8b8a554 PT	97	}
f8b8a554 PT	98	#endif
f8b8a554 PT	99	return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
	100	}
	101	#else
	102	static inline s64 mmc_offset(int copy)
97039ab9	103	{
f8b8a554	104	s64 offset = CONFIG_ENV_OFFSET;
5c088ee8	105
f8b8a554	106	#if defined(CONFIG_ENV_OFFSET_REDUND)
d196bd88	107	if (copy)
5c088ee8	108	offset = CONFIG_ENV_OFFSET_REDUND;
d196bd88	109	#endif
f8b8a554 PT	110	return offset;
	111	}
	112	#endif
	113
	114	__weak int mmc_get_env_addr(struct mmc mmc, int copy, u32 env_addr)
	115	{
	116	s64 offset = mmc_offset(copy);
5c088ee8 SW	117
	118	if (offset < 0)
	119	offset += mmc->capacity;
	120
	121	*env_addr = offset;
	122
97039ab9 MH	123	return 0;
97039ab9 MH	124	}
97039ab9	125
e92029c0 CG	126	__weak int mmc_get_env_dev(void)
	127	{
	128	return CONFIG_SYS_MMC_ENV_DEV;
	129	}
	130
b9c8ccab	131	#ifdef CONFIG_SYS_MMC_ENV_PART
6e7b7df4 DL	132	__weak uint mmc_get_env_part(struct mmc *mmc)
	133	{
	134	return CONFIG_SYS_MMC_ENV_PART;
	135	}
	136
873cc1d7 SW	137	static unsigned char env_mmc_orig_hwpart;
873cc1d7 SW	138
6e7b7df4 DL	139	static int mmc_set_env_part(struct mmc *mmc)
	140	{
	141	uint part = mmc_get_env_part(mmc);
e92029c0	142	int dev = mmc_get_env_dev();
6e7b7df4	143	int ret = 0;
b9c8ccab	144
69f45cd5 SG	145	env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
69f45cd5 SG	146	ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
873cc1d7 SW	147	if (ret)
873cc1d7 SW	148	puts("MMC partition switch failed\n");
6e7b7df4 DL	149
	150	return ret;
	151	}
	152	#else
	153	static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
b9c8ccab TR	154	#endif
b9c8ccab TR	155
c75648d7	156	static const char init_mmc_for_env(struct mmc mmc)
6e7b7df4	157	{
c75648d7	158	if (!mmc)
a85da21f	159	return "!No MMC card found";
a8060359	160
01b73fe6 SG	161	#ifdef CONFIG_BLK
	162	struct udevice *dev;
	163
	164	if (blk_get_from_parent(mmc->dev, &dev))
	165	return "!No block device";
	166	#else
c75648d7	167	if (mmc_init(mmc))
a85da21f	168	return "!MMC init failed";
e7017a3c	169	#endif
c75648d7	170	if (mmc_set_env_part(mmc))
a85da21f	171	return "!MMC partition switch failed";
a8060359	172
c75648d7	173	return NULL;
a8060359 TL	174	}
a8060359 TL	175
9404a5fc SW	176	static void fini_mmc_for_env(struct mmc *mmc)
	177	{
	178	#ifdef CONFIG_SYS_MMC_ENV_PART
e92029c0	179	int dev = mmc_get_env_dev();
b9c8ccab	180
69f45cd5	181	blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
9404a5fc SW	182	#endif
	183	}
	184
e5bce247	185	#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
e8db8f71 IG	186	static inline int write_env(struct mmc *mmc, unsigned long size,
e8db8f71 IG	187	unsigned long offset, const void *buffer)
a8060359 TL	188	{
a8060359 TL	189	uint blk_start, blk_cnt, n;
5461acba	190	struct blk_desc *desc = mmc_get_blk_desc(mmc);
a8060359	191
e8db8f71 IG	192	blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
e8db8f71 IG	193	blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
a8060359	194
5461acba	195	n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
a8060359 TL	196
	197	return (n == blk_cnt) ? 0 : -1;
	198	}
	199
e5bce247	200	static int env_mmc_save(void)
a8060359	201	{
cd0f4fa1	202	ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
e92029c0 CG	203	int dev = mmc_get_env_dev();
e92029c0 CG	204	struct mmc *mmc = find_mmc_device(dev);
e8db8f71	205	u32 offset;
d196bd88	206	int ret, copy = 0;
c75648d7	207	const char *errmsg;
a8060359	208
c75648d7 TH	209	errmsg = init_mmc_for_env(mmc);
	210	if (errmsg) {
	211	printf("%s\n", errmsg);
97039ab9	212	return 1;
c75648d7	213	}
97039ab9	214
7ce1526e MV	215	ret = env_export(env_new);
7ce1526e MV	216	if (ret)
9404a5fc	217	goto fini;
d196bd88 MH	218
d196bd88 MH	219	#ifdef CONFIG_ENV_OFFSET_REDUND
203e94f6	220	if (gd->env_valid == ENV_VALID)
d196bd88 MH	221	copy = 1;
	222	#endif
	223
	224	if (mmc_get_env_addr(mmc, copy, &offset)) {
	225	ret = 1;
	226	goto fini;
	227	}
	228
e92029c0	229	printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
4036b630	230	if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
a8060359	231	puts("failed\n");
9404a5fc SW	232	ret = 1;
9404a5fc SW	233	goto fini;
a8060359 TL	234	}
a8060359 TL	235
9404a5fc SW	236	ret = 0;
9404a5fc SW	237
d196bd88	238	#ifdef CONFIG_ENV_OFFSET_REDUND
203e94f6	239	gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
d196bd88 MH	240	#endif
d196bd88 MH	241
9404a5fc SW	242	fini:
	243	fini_mmc_for_env(mmc);
	244	return ret;
a8060359	245	}
e5bce247	246	#endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
a8060359	247
e8db8f71 IG	248	static inline int read_env(struct mmc *mmc, unsigned long size,
e8db8f71 IG	249	unsigned long offset, const void *buffer)
a8060359 TL	250	{
a8060359 TL	251	uint blk_start, blk_cnt, n;
5461acba	252	struct blk_desc *desc = mmc_get_blk_desc(mmc);
a8060359	253
e8db8f71 IG	254	blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
e8db8f71 IG	255	blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
a8060359	256
5461acba	257	n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
a8060359 TL	258
	259	return (n == blk_cnt) ? 0 : -1;
	260	}
	261
d196bd88	262	#ifdef CONFIG_ENV_OFFSET_REDUND
c5951991	263	static int env_mmc_load(void)
d196bd88 MH	264	{
d196bd88 MH	265	#if !defined(ENV_IS_EMBEDDED)
b9c8ccab	266	struct mmc *mmc;
d196bd88 MH	267	u32 offset1, offset2;
d196bd88 MH	268	int read1_fail = 0, read2_fail = 0;
d196bd88	269	int ret;
e92029c0	270	int dev = mmc_get_env_dev();
c75648d7	271	const char *errmsg = NULL;
d196bd88	272
452a2722 MN	273	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
	274	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
	275
b9c8ccab TR	276	mmc = find_mmc_device(dev);
b9c8ccab TR	277
c75648d7 TH	278	errmsg = init_mmc_for_env(mmc);
c75648d7 TH	279	if (errmsg) {
c5951991	280	ret = -EIO;
d196bd88 MH	281	goto err;
	282	}
	283
	284	if (mmc_get_env_addr(mmc, 0, &offset1) \|\|
	285	mmc_get_env_addr(mmc, 1, &offset2)) {
c5951991	286	ret = -EIO;
d196bd88 MH	287	goto fini;
	288	}
	289
	290	read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
	291	read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
	292
31f044bd SG	293	ret = env_import_redund((char )tmp_env1, read1_fail, (char )tmp_env2,
31f044bd SG	294	read2_fail);
d196bd88 MH	295
	296	fini:
	297	fini_mmc_for_env(mmc);
	298	err:
	299	if (ret)
c75648d7	300	set_default_env(errmsg);
c5951991	301
d196bd88	302	#endif
c5951991	303	return ret;
d196bd88 MH	304	}
d196bd88 MH	305	#else /* ! CONFIG_ENV_OFFSET_REDUND */
c5951991	306	static int env_mmc_load(void)
a8060359 TL	307	{
a8060359 TL	308	#if !defined(ENV_IS_EMBEDDED)
cd0f4fa1	309	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
b9c8ccab	310	struct mmc *mmc;
97039ab9	311	u32 offset;
9404a5fc	312	int ret;
e92029c0	313	int dev = mmc_get_env_dev();
c75648d7	314	const char *errmsg;
b9c8ccab	315
b9c8ccab	316	mmc = find_mmc_device(dev);
a8060359	317
c75648d7 TH	318	errmsg = init_mmc_for_env(mmc);
c75648d7 TH	319	if (errmsg) {
c5951991	320	ret = -EIO;
9404a5fc SW	321	goto err;
9404a5fc SW	322	}
a8060359	323
d196bd88	324	if (mmc_get_env_addr(mmc, 0, &offset)) {
c5951991	325	ret = -EIO;
9404a5fc SW	326	goto fini;
	327	}
	328
cd0f4fa1	329	if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
c75648d7	330	errmsg = "!read failed";
c5951991	331	ret = -EIO;
9404a5fc SW	332	goto fini;
9404a5fc SW	333	}
a8060359	334
2166ebf7	335	ret = env_import(buf, 1);
9404a5fc SW	336
	337	fini:
	338	fini_mmc_for_env(mmc);
	339	err:
	340	if (ret)
c75648d7	341	set_default_env(errmsg);
a8060359	342	#endif
c5951991	343	return ret;
a8060359	344	}
d196bd88	345	#endif /* CONFIG_ENV_OFFSET_REDUND */
4415f1d1 SG	346
	347	U_BOOT_ENV_LOCATION(mmc) = {
	348	.location = ENVL_MMC,
ac358beb	349	ENV_NAME("MMC")
e5bce247	350	.load = env_mmc_load,
4415f1d1	351	#ifndef CONFIG_SPL_BUILD
e5bce247	352	.save = env_save_ptr(env_mmc_save),
4415f1d1	353	#endif
4415f1d1	354	};