[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 <search.h>
#include <errno.h>

#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 s64 mmc_offset(int copy)
{
	const char *propname = "u-boot,mmc-env-offset";
	s64 defvalue = CONFIG_ENV_OFFSET;

#if defined(CONFIG_ENV_OFFSET_REDUND)
	if (copy) {
		propname = "u-boot,mmc-env-offset-redundant";
		defvalue = CONFIG_ENV_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;
	}

	puts("done\n");
	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);

	if (read1_fail && read2_fail)
		puts("*** Error - No Valid Environment Area found\n");
	else if (read1_fail || read2_fail)
		puts("*** Warning - some problems detected "
		     "reading environment; recovered successfully\n");

	if (read1_fail && read2_fail) {
		errmsg = "!bad CRC";
		ret = -EIO;
		goto fini;
	} else if (!read1_fail && read2_fail) {
		gd->env_valid = ENV_VALID;
		env_import((char *)tmp_env1, 1);
	} else if (read1_fail && !read2_fail) {
		gd->env_valid = ENV_REDUND;
		env_import((char *)tmp_env2, 1);
	} else {
		env_import_redund((char *)tmp_env1, (char *)tmp_env2);
	}

	ret = 0;

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;
	}

	env_import(buf, 1);
	ret = 0;

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>
6d1d51b3	18	#include <search.h>
e79f4839	19	#include <errno.h>
a8060359	20
d196bd88 MH	21	#if defined(CONFIG_ENV_SIZE_REDUND) && \
	22	(CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
	23	#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
	24	#endif
	25
a8060359 TL	26	DECLARE_GLOBAL_DATA_PTR;
a8060359 TL	27
97039ab9 MH	28	#if !defined(CONFIG_ENV_OFFSET)
	29	#define CONFIG_ENV_OFFSET 0
	30	#endif
	31
f8b8a554 PT	32	#if CONFIG_IS_ENABLED(OF_CONTROL)
	33	static inline s64 mmc_offset(int copy)
	34	{
	35	const char *propname = "u-boot,mmc-env-offset";
	36	s64 defvalue = CONFIG_ENV_OFFSET;
	37
	38	#if defined(CONFIG_ENV_OFFSET_REDUND)
	39	if (copy) {
	40	propname = "u-boot,mmc-env-offset-redundant";
	41	defvalue = CONFIG_ENV_OFFSET_REDUND;
	42	}
	43	#endif
	44
	45	return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
	46	}
	47	#else
	48	static inline s64 mmc_offset(int copy)
97039ab9	49	{
f8b8a554	50	s64 offset = CONFIG_ENV_OFFSET;
5c088ee8	51
f8b8a554	52	#if defined(CONFIG_ENV_OFFSET_REDUND)
d196bd88	53	if (copy)
5c088ee8	54	offset = CONFIG_ENV_OFFSET_REDUND;
d196bd88	55	#endif
f8b8a554 PT	56	return offset;
	57	}
	58	#endif
	59
	60	__weak int mmc_get_env_addr(struct mmc mmc, int copy, u32 env_addr)
	61	{
	62	s64 offset = mmc_offset(copy);
5c088ee8 SW	63
	64	if (offset < 0)
	65	offset += mmc->capacity;
	66
	67	*env_addr = offset;
	68
97039ab9 MH	69	return 0;
97039ab9 MH	70	}
97039ab9	71
e92029c0 CG	72	__weak int mmc_get_env_dev(void)
	73	{
	74	return CONFIG_SYS_MMC_ENV_DEV;
	75	}
	76
b9c8ccab	77	#ifdef CONFIG_SYS_MMC_ENV_PART
6e7b7df4 DL	78	__weak uint mmc_get_env_part(struct mmc *mmc)
	79	{
	80	return CONFIG_SYS_MMC_ENV_PART;
	81	}
	82
873cc1d7 SW	83	static unsigned char env_mmc_orig_hwpart;
873cc1d7 SW	84
6e7b7df4 DL	85	static int mmc_set_env_part(struct mmc *mmc)
	86	{
	87	uint part = mmc_get_env_part(mmc);
e92029c0	88	int dev = mmc_get_env_dev();
6e7b7df4	89	int ret = 0;
b9c8ccab	90
69f45cd5 SG	91	env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
69f45cd5 SG	92	ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
873cc1d7 SW	93	if (ret)
873cc1d7 SW	94	puts("MMC partition switch failed\n");
6e7b7df4 DL	95
	96	return ret;
	97	}
	98	#else
	99	static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
b9c8ccab TR	100	#endif
b9c8ccab TR	101
c75648d7	102	static const char init_mmc_for_env(struct mmc mmc)
6e7b7df4	103	{
c75648d7	104	if (!mmc)
a85da21f	105	return "!No MMC card found";
a8060359	106
01b73fe6 SG	107	#ifdef CONFIG_BLK
	108	struct udevice *dev;
	109
	110	if (blk_get_from_parent(mmc->dev, &dev))
	111	return "!No block device";
	112	#else
c75648d7	113	if (mmc_init(mmc))
a85da21f	114	return "!MMC init failed";
e7017a3c	115	#endif
c75648d7	116	if (mmc_set_env_part(mmc))
a85da21f	117	return "!MMC partition switch failed";
a8060359	118
c75648d7	119	return NULL;
a8060359 TL	120	}
a8060359 TL	121
9404a5fc SW	122	static void fini_mmc_for_env(struct mmc *mmc)
	123	{
	124	#ifdef CONFIG_SYS_MMC_ENV_PART
e92029c0	125	int dev = mmc_get_env_dev();
b9c8ccab	126
69f45cd5	127	blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
9404a5fc SW	128	#endif
	129	}
	130
e5bce247	131	#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
e8db8f71 IG	132	static inline int write_env(struct mmc *mmc, unsigned long size,
e8db8f71 IG	133	unsigned long offset, const void *buffer)
a8060359 TL	134	{
a8060359 TL	135	uint blk_start, blk_cnt, n;
5461acba	136	struct blk_desc *desc = mmc_get_blk_desc(mmc);
a8060359	137
e8db8f71 IG	138	blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
e8db8f71 IG	139	blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
a8060359	140
5461acba	141	n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
a8060359 TL	142
	143	return (n == blk_cnt) ? 0 : -1;
	144	}
	145
e5bce247	146	static int env_mmc_save(void)
a8060359	147	{
cd0f4fa1	148	ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
e92029c0 CG	149	int dev = mmc_get_env_dev();
e92029c0 CG	150	struct mmc *mmc = find_mmc_device(dev);
e8db8f71	151	u32 offset;
d196bd88	152	int ret, copy = 0;
c75648d7	153	const char *errmsg;
a8060359	154
c75648d7 TH	155	errmsg = init_mmc_for_env(mmc);
	156	if (errmsg) {
	157	printf("%s\n", errmsg);
97039ab9	158	return 1;
c75648d7	159	}
97039ab9	160
7ce1526e MV	161	ret = env_export(env_new);
7ce1526e MV	162	if (ret)
9404a5fc	163	goto fini;
d196bd88 MH	164
d196bd88 MH	165	#ifdef CONFIG_ENV_OFFSET_REDUND
203e94f6	166	if (gd->env_valid == ENV_VALID)
d196bd88 MH	167	copy = 1;
	168	#endif
	169
	170	if (mmc_get_env_addr(mmc, copy, &offset)) {
	171	ret = 1;
	172	goto fini;
	173	}
	174
e92029c0	175	printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
4036b630	176	if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
a8060359	177	puts("failed\n");
9404a5fc SW	178	ret = 1;
9404a5fc SW	179	goto fini;
a8060359 TL	180	}
	181
	182	puts("done\n");
9404a5fc SW	183	ret = 0;
9404a5fc SW	184
d196bd88	185	#ifdef CONFIG_ENV_OFFSET_REDUND
203e94f6	186	gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
d196bd88 MH	187	#endif
d196bd88 MH	188
9404a5fc SW	189	fini:
	190	fini_mmc_for_env(mmc);
	191	return ret;
a8060359	192	}
e5bce247	193	#endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
a8060359	194
e8db8f71 IG	195	static inline int read_env(struct mmc *mmc, unsigned long size,
e8db8f71 IG	196	unsigned long offset, const void *buffer)
a8060359 TL	197	{
a8060359 TL	198	uint blk_start, blk_cnt, n;
5461acba	199	struct blk_desc *desc = mmc_get_blk_desc(mmc);
a8060359	200
e8db8f71 IG	201	blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
e8db8f71 IG	202	blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
a8060359	203
5461acba	204	n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
a8060359 TL	205
	206	return (n == blk_cnt) ? 0 : -1;
	207	}
	208
d196bd88	209	#ifdef CONFIG_ENV_OFFSET_REDUND
c5951991	210	static int env_mmc_load(void)
d196bd88 MH	211	{
d196bd88 MH	212	#if !defined(ENV_IS_EMBEDDED)
b9c8ccab	213	struct mmc *mmc;
d196bd88 MH	214	u32 offset1, offset2;
d196bd88 MH	215	int read1_fail = 0, read2_fail = 0;
d196bd88	216	int ret;
e92029c0	217	int dev = mmc_get_env_dev();
c75648d7	218	const char *errmsg = NULL;
d196bd88	219
452a2722 MN	220	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
	221	ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
	222
b9c8ccab TR	223	mmc = find_mmc_device(dev);
b9c8ccab TR	224
c75648d7 TH	225	errmsg = init_mmc_for_env(mmc);
c75648d7 TH	226	if (errmsg) {
c5951991	227	ret = -EIO;
d196bd88 MH	228	goto err;
	229	}
	230
	231	if (mmc_get_env_addr(mmc, 0, &offset1) \|\|
	232	mmc_get_env_addr(mmc, 1, &offset2)) {
c5951991	233	ret = -EIO;
d196bd88 MH	234	goto fini;
	235	}
	236
	237	read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
	238	read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
	239
	240	if (read1_fail && read2_fail)
	241	puts("*** Error - No Valid Environment Area found\n");
	242	else if (read1_fail \|\| read2_fail)
	243	puts("*** Warning - some problems detected "
	244	"reading environment; recovered successfully\n");
	245
9d364af2	246	if (read1_fail && read2_fail) {
c75648d7	247	errmsg = "!bad CRC";
c5951991	248	ret = -EIO;
d196bd88	249	goto fini;
9d364af2	250	} else if (!read1_fail && read2_fail) {
203e94f6	251	gd->env_valid = ENV_VALID;
9d364af2 FA	252	env_import((char *)tmp_env1, 1);
9d364af2 FA	253	} else if (read1_fail && !read2_fail) {
203e94f6	254	gd->env_valid = ENV_REDUND;
9d364af2	255	env_import((char *)tmp_env2, 1);
d196bd88	256	} else {
9d364af2	257	env_import_redund((char )tmp_env1, (char )tmp_env2);
d196bd88 MH	258	}
d196bd88 MH	259
d196bd88 MH	260	ret = 0;
	261
	262	fini:
	263	fini_mmc_for_env(mmc);
	264	err:
	265	if (ret)
c75648d7	266	set_default_env(errmsg);
c5951991	267
d196bd88	268	#endif
c5951991	269	return ret;
d196bd88 MH	270	}
d196bd88 MH	271	#else /* ! CONFIG_ENV_OFFSET_REDUND */
c5951991	272	static int env_mmc_load(void)
a8060359 TL	273	{
a8060359 TL	274	#if !defined(ENV_IS_EMBEDDED)
cd0f4fa1	275	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
b9c8ccab	276	struct mmc *mmc;
97039ab9	277	u32 offset;
9404a5fc	278	int ret;
e92029c0	279	int dev = mmc_get_env_dev();
c75648d7	280	const char *errmsg;
b9c8ccab	281
b9c8ccab	282	mmc = find_mmc_device(dev);
a8060359	283
c75648d7 TH	284	errmsg = init_mmc_for_env(mmc);
c75648d7 TH	285	if (errmsg) {
c5951991	286	ret = -EIO;
9404a5fc SW	287	goto err;
9404a5fc SW	288	}
a8060359	289
d196bd88	290	if (mmc_get_env_addr(mmc, 0, &offset)) {
c5951991	291	ret = -EIO;
9404a5fc SW	292	goto fini;
	293	}
	294
cd0f4fa1	295	if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
c75648d7	296	errmsg = "!read failed";
c5951991	297	ret = -EIO;
9404a5fc SW	298	goto fini;
9404a5fc SW	299	}
a8060359	300
cd0f4fa1	301	env_import(buf, 1);
9404a5fc SW	302	ret = 0;
	303
	304	fini:
	305	fini_mmc_for_env(mmc);
	306	err:
	307	if (ret)
c75648d7	308	set_default_env(errmsg);
a8060359	309	#endif
c5951991	310	return ret;
a8060359	311	}
d196bd88	312	#endif /* CONFIG_ENV_OFFSET_REDUND */
4415f1d1 SG	313
	314	U_BOOT_ENV_LOCATION(mmc) = {
	315	.location = ENVL_MMC,
ac358beb	316	ENV_NAME("MMC")
e5bce247	317	.load = env_mmc_load,
4415f1d1	318	#ifndef CONFIG_SPL_BUILD
e5bce247	319	.save = env_save_ptr(env_mmc_save),
4415f1d1	320	#endif
4415f1d1	321	};