[thirdparty/u-boot.git] / env / mmc.c

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

/* #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";

#if CONFIG_IS_ENABLED(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_initialize(NULL);

	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, 0);

#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, 0);
#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
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
a8060359	2	/*
97039ab9	3	* (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
a8060359 TL	4	*/
	5
	6	/* #define DEBUG */
	7
	8	#include <common.h>
	9
	10	#include <command.h>
	11	#include <environment.h>
f8b8a554	12	#include <fdtdec.h>
a8060359 TL	13	#include <linux/stddef.h>
a8060359 TL	14	#include <malloc.h>
cf92e05c	15	#include <memalign.h>
a8060359	16	#include <mmc.h>
c9e87ba6	17	#include <part.h>
6d1d51b3	18	#include <search.h>
e79f4839	19	#include <errno.h>
a8060359	20
c9e87ba6 JRO	21	#define __STR(X) #X
	22	#define STR(X) __STR(X)
	23
d196bd88 MH	24	#if defined(CONFIG_ENV_SIZE_REDUND) && \
	25	(CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
	26	#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
	27	#endif
	28
a8060359 TL	29	DECLARE_GLOBAL_DATA_PTR;
a8060359 TL	30
97039ab9 MH	31	#if !defined(CONFIG_ENV_OFFSET)
	32	#define CONFIG_ENV_OFFSET 0
	33	#endif
	34
f8b8a554	35	#if CONFIG_IS_ENABLED(OF_CONTROL)
c9e87ba6 JRO	36	static inline int mmc_offset_try_partition(const char str, s64 val)
	37	{
	38	disk_partition_t info;
	39	struct blk_desc *desc;
	40	int len, i, ret;
	41
	42	ret = blk_get_device_by_str("mmc", STR(CONFIG_SYS_MMC_ENV_DEV), &desc);
	43	if (ret < 0)
	44	return (ret);
	45
	46	for (i = 1;;i++) {
	47	ret = part_get_info(desc, i, &info);
	48	if (ret < 0)
	49	return ret;
	50
	51	if (!strncmp((const char *)info.name, str, sizeof(str)))
	52	break;
	53	}
	54
	55	/* round up to info.blksz */
	56	len = (CONFIG_ENV_SIZE + info.blksz - 1) & ~(info.blksz - 1);
	57
	58	/* use the top of the partion for the environment */
	59	*val = (info.start + info.size - 1) - len / info.blksz;
	60
	61	return 0;
	62	}
	63
f8b8a554 PT	64	static inline s64 mmc_offset(int copy)
f8b8a554 PT	65	{
c9e87ba6 JRO	66	const struct {
	67	const char *offset_redund;
	68	const char *partition;
	69	const char *offset;
	70	} dt_prop = {
	71	.offset_redund = "u-boot,mmc-env-offset-redundant",
	72	.partition = "u-boot,mmc-env-partition",
	73	.offset = "u-boot,mmc-env-offset",
	74	};
fd374665	75	s64 val = 0, defvalue;
c9e87ba6 JRO	76	const char *propname;
	77	const char *str;
	78	int err;
	79
	80	/* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
	81	str = fdtdec_get_config_string(gd->fdt_blob, dt_prop.partition);
	82	if (str) {
	83	/* try to place the environment at end of the partition */
	84	err = mmc_offset_try_partition(str, &val);
	85	if (!err)
	86	return val;
	87	}
	88
	89	defvalue = CONFIG_ENV_OFFSET;
	90	propname = dt_prop.offset;
f8b8a554 PT	91
	92	#if defined(CONFIG_ENV_OFFSET_REDUND)
	93	if (copy) {
f8b8a554	94	defvalue = CONFIG_ENV_OFFSET_REDUND;
c9e87ba6	95	propname = dt_prop.offset_redund;
f8b8a554 PT	96	}
f8b8a554 PT	97	#endif
f8b8a554 PT	98	return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
	99	}
	100	#else
	101	static inline s64 mmc_offset(int copy)
97039ab9	102	{
f8b8a554	103	s64 offset = CONFIG_ENV_OFFSET;
5c088ee8	104
f8b8a554	105	#if defined(CONFIG_ENV_OFFSET_REDUND)
d196bd88	106	if (copy)
5c088ee8	107	offset = CONFIG_ENV_OFFSET_REDUND;
d196bd88	108	#endif
f8b8a554 PT	109	return offset;
	110	}
	111	#endif
	112
	113	__weak int mmc_get_env_addr(struct mmc mmc, int copy, u32 env_addr)
	114	{
	115	s64 offset = mmc_offset(copy);
5c088ee8 SW	116
	117	if (offset < 0)
	118	offset += mmc->capacity;
	119
	120	*env_addr = offset;
	121
97039ab9 MH	122	return 0;
97039ab9 MH	123	}
97039ab9	124
e92029c0 CG	125	__weak int mmc_get_env_dev(void)
	126	{
	127	return CONFIG_SYS_MMC_ENV_DEV;
	128	}
	129
b9c8ccab	130	#ifdef CONFIG_SYS_MMC_ENV_PART
6e7b7df4 DL	131	__weak uint mmc_get_env_part(struct mmc *mmc)
	132	{
	133	return CONFIG_SYS_MMC_ENV_PART;
	134	}
	135
873cc1d7 SW	136	static unsigned char env_mmc_orig_hwpart;
873cc1d7 SW	137
6e7b7df4 DL	138	static int mmc_set_env_part(struct mmc *mmc)
	139	{
	140	uint part = mmc_get_env_part(mmc);
e92029c0	141	int dev = mmc_get_env_dev();
6e7b7df4	142	int ret = 0;
b9c8ccab	143
69f45cd5 SG	144	env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
69f45cd5 SG	145	ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
873cc1d7 SW	146	if (ret)
873cc1d7 SW	147	puts("MMC partition switch failed\n");
6e7b7df4 DL	148
	149	return ret;
	150	}
	151	#else
	152	static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
b9c8ccab TR	153	#endif
b9c8ccab TR	154
c75648d7	155	static const char init_mmc_for_env(struct mmc mmc)
6e7b7df4	156	{
c75648d7	157	if (!mmc)
c5d548a9	158	return "No MMC card found";
a8060359	159
d48b8d11	160	#if CONFIG_IS_ENABLED(BLK)
01b73fe6 SG	161	struct udevice *dev;
	162
	163	if (blk_get_from_parent(mmc->dev, &dev))
c5d548a9	164	return "No block device";
01b73fe6	165	#else
c75648d7	166	if (mmc_init(mmc))
c5d548a9	167	return "MMC init failed";
e7017a3c	168	#endif
c75648d7	169	if (mmc_set_env_part(mmc))
c5d548a9	170	return "MMC partition switch failed";
a8060359	171
c75648d7	172	return NULL;
a8060359 TL	173	}
a8060359 TL	174
9404a5fc SW	175	static void fini_mmc_for_env(struct mmc *mmc)
	176	{
	177	#ifdef CONFIG_SYS_MMC_ENV_PART
e92029c0	178	int dev = mmc_get_env_dev();
b9c8ccab	179
69f45cd5	180	blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
9404a5fc SW	181	#endif
	182	}
	183
e5bce247	184	#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
e8db8f71 IG	185	static inline int write_env(struct mmc *mmc, unsigned long size,
e8db8f71 IG	186	unsigned long offset, const void *buffer)
a8060359 TL	187	{
a8060359 TL	188	uint blk_start, blk_cnt, n;
5461acba	189	struct blk_desc *desc = mmc_get_blk_desc(mmc);
a8060359	190
e8db8f71 IG	191	blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
e8db8f71 IG	192	blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
a8060359	193
5461acba	194	n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
a8060359 TL	195
	196	return (n == blk_cnt) ? 0 : -1;
	197	}
	198
e5bce247	199	static int env_mmc_save(void)
a8060359	200	{
cd0f4fa1	201	ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
e92029c0 CG	202	int dev = mmc_get_env_dev();
e92029c0 CG	203	struct mmc *mmc = find_mmc_device(dev);
e8db8f71	204	u32 offset;
d196bd88	205	int ret, copy = 0;
c75648d7	206	const char *errmsg;
a8060359	207
c75648d7 TH	208	errmsg = init_mmc_for_env(mmc);
	209	if (errmsg) {
	210	printf("%s\n", errmsg);
97039ab9	211	return 1;
c75648d7	212	}
97039ab9	213
7ce1526e MV	214	ret = env_export(env_new);
7ce1526e MV	215	if (ret)
9404a5fc	216	goto fini;
d196bd88 MH	217
d196bd88 MH	218	#ifdef CONFIG_ENV_OFFSET_REDUND
203e94f6	219	if (gd->env_valid == ENV_VALID)
d196bd88 MH	220	copy = 1;
	221	#endif
	222
	223	if (mmc_get_env_addr(mmc, copy, &offset)) {
	224	ret = 1;
	225	goto fini;
	226	}
	227
e92029c0	228	printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
4036b630	229	if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
a8060359	230	puts("failed\n");
9404a5fc SW	231	ret = 1;
9404a5fc SW	232	goto fini;
a8060359 TL	233	}
a8060359 TL	234
9404a5fc SW	235	ret = 0;
9404a5fc SW	236
d196bd88	237	#ifdef CONFIG_ENV_OFFSET_REDUND
203e94f6	238	gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
d196bd88 MH	239	#endif
d196bd88 MH	240
9404a5fc SW	241	fini:
	242	fini_mmc_for_env(mmc);
	243	return ret;
a8060359	244	}
e5bce247	245	#endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
a8060359	246
e8db8f71 IG	247	static inline int read_env(struct mmc *mmc, unsigned long size,
e8db8f71 IG	248	unsigned long offset, const void *buffer)
a8060359 TL	249	{
a8060359 TL	250	uint blk_start, blk_cnt, n;
5461acba	251	struct blk_desc *desc = mmc_get_blk_desc(mmc);
a8060359	252
e8db8f71 IG	253	blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
e8db8f71 IG	254	blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
a8060359	255
5461acba	256	n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
a8060359 TL	257
	258	return (n == blk_cnt) ? 0 : -1;
	259	}
	260
d196bd88	261	#ifdef CONFIG_ENV_OFFSET_REDUND
c5951991	262	static int env_mmc_load(void)
d196bd88 MH	263	{
d196bd88 MH	264	#if !defined(ENV_IS_EMBEDDED)
b9c8ccab	265	struct mmc *mmc;
d196bd88 MH	266	u32 offset1, offset2;
d196bd88 MH	267	int read1_fail = 0, read2_fail = 0;
d196bd88	268	int ret;
e92029c0	269	int dev = mmc_get_env_dev();
c75648d7	270	const char *errmsg = NULL;
d196bd88	271
452a2722 MN	272	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
	273	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
	274
26862b4a FA	275	mmc_initialize(NULL);
26862b4a FA	276
b9c8ccab TR	277	mmc = find_mmc_device(dev);
b9c8ccab TR	278
c75648d7 TH	279	errmsg = init_mmc_for_env(mmc);
c75648d7 TH	280	if (errmsg) {
c5951991	281	ret = -EIO;
d196bd88 MH	282	goto err;
	283	}
	284
	285	if (mmc_get_env_addr(mmc, 0, &offset1) \|\|
	286	mmc_get_env_addr(mmc, 1, &offset2)) {
c5951991	287	ret = -EIO;
d196bd88 MH	288	goto fini;
	289	}
	290
	291	read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
	292	read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
	293
31f044bd SG	294	ret = env_import_redund((char )tmp_env1, read1_fail, (char )tmp_env2,
31f044bd SG	295	read2_fail);
d196bd88 MH	296
	297	fini:
	298	fini_mmc_for_env(mmc);
	299	err:
	300	if (ret)
c5d548a9	301	set_default_env(errmsg, 0);
c5951991	302
d196bd88	303	#endif
c5951991	304	return ret;
d196bd88 MH	305	}
d196bd88 MH	306	#else /* ! CONFIG_ENV_OFFSET_REDUND */
c5951991	307	static int env_mmc_load(void)
a8060359 TL	308	{
a8060359 TL	309	#if !defined(ENV_IS_EMBEDDED)
cd0f4fa1	310	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
b9c8ccab	311	struct mmc *mmc;
97039ab9	312	u32 offset;
9404a5fc	313	int ret;
e92029c0	314	int dev = mmc_get_env_dev();
c75648d7	315	const char *errmsg;
b9c8ccab	316
b9c8ccab	317	mmc = find_mmc_device(dev);
a8060359	318
c75648d7 TH	319	errmsg = init_mmc_for_env(mmc);
c75648d7 TH	320	if (errmsg) {
c5951991	321	ret = -EIO;
9404a5fc SW	322	goto err;
9404a5fc SW	323	}
a8060359	324
d196bd88	325	if (mmc_get_env_addr(mmc, 0, &offset)) {
c5951991	326	ret = -EIO;
9404a5fc SW	327	goto fini;
	328	}
	329
cd0f4fa1	330	if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
c75648d7	331	errmsg = "!read failed";
c5951991	332	ret = -EIO;
9404a5fc SW	333	goto fini;
9404a5fc SW	334	}
a8060359	335
2166ebf7	336	ret = env_import(buf, 1);
9404a5fc SW	337
	338	fini:
	339	fini_mmc_for_env(mmc);
	340	err:
	341	if (ret)
c5d548a9	342	set_default_env(errmsg, 0);
a8060359	343	#endif
c5951991	344	return ret;
a8060359	345	}
d196bd88	346	#endif /* CONFIG_ENV_OFFSET_REDUND */
4415f1d1 SG	347
	348	U_BOOT_ENV_LOCATION(mmc) = {
	349	.location = ENVL_MMC,
ac358beb	350	ENV_NAME("MMC")
e5bce247	351	.load = env_mmc_load,
4415f1d1	352	#ifndef CONFIG_SPL_BUILD
e5bce247	353	.save = env_save_ptr(env_mmc_save),
4415f1d1	354	#endif
4415f1d1	355	};