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git.ipfire.org Git - thirdparty/u-boot.git/blob - env/mmc.c
1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
12 #include <env_internal.h>
14 #include <linux/stddef.h>
23 #define STR(X) __STR(X)
25 DECLARE_GLOBAL_DATA_PTR
;
27 #if CONFIG_IS_ENABLED(OF_CONTROL)
28 static inline int mmc_offset_try_partition(const char *str
, s64
*val
)
30 disk_partition_t info
;
31 struct blk_desc
*desc
;
34 ret
= blk_get_device_by_str("mmc", STR(CONFIG_SYS_MMC_ENV_DEV
), &desc
);
39 ret
= part_get_info(desc
, i
, &info
);
43 if (!strncmp((const char *)info
.name
, str
, sizeof(str
)))
47 /* round up to info.blksz */
48 len
= (CONFIG_ENV_SIZE
+ info
.blksz
- 1) & ~(info
.blksz
- 1);
50 /* use the top of the partion for the environment */
51 *val
= (info
.start
+ info
.size
- 1) - len
/ info
.blksz
;
56 static inline s64
mmc_offset(int copy
)
59 const char *offset_redund
;
60 const char *partition
;
63 .offset_redund
= "u-boot,mmc-env-offset-redundant",
64 .partition
= "u-boot,mmc-env-partition",
65 .offset
= "u-boot,mmc-env-offset",
67 s64 val
= 0, defvalue
;
72 /* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
73 str
= fdtdec_get_config_string(gd
->fdt_blob
, dt_prop
.partition
);
75 /* try to place the environment at end of the partition */
76 err
= mmc_offset_try_partition(str
, &val
);
81 defvalue
= CONFIG_ENV_OFFSET
;
82 propname
= dt_prop
.offset
;
84 #if defined(CONFIG_ENV_OFFSET_REDUND)
86 defvalue
= CONFIG_ENV_OFFSET_REDUND
;
87 propname
= dt_prop
.offset_redund
;
90 return fdtdec_get_config_int(gd
->fdt_blob
, propname
, defvalue
);
93 static inline s64
mmc_offset(int copy
)
95 s64 offset
= CONFIG_ENV_OFFSET
;
97 #if defined(CONFIG_ENV_OFFSET_REDUND)
99 offset
= CONFIG_ENV_OFFSET_REDUND
;
105 __weak
int mmc_get_env_addr(struct mmc
*mmc
, int copy
, u32
*env_addr
)
107 s64 offset
= mmc_offset(copy
);
110 offset
+= mmc
->capacity
;
117 __weak
int mmc_get_env_dev(void)
119 return CONFIG_SYS_MMC_ENV_DEV
;
122 #ifdef CONFIG_SYS_MMC_ENV_PART
123 __weak uint
mmc_get_env_part(struct mmc
*mmc
)
125 return CONFIG_SYS_MMC_ENV_PART
;
128 static unsigned char env_mmc_orig_hwpart
;
130 static int mmc_set_env_part(struct mmc
*mmc
)
132 uint part
= mmc_get_env_part(mmc
);
133 int dev
= mmc_get_env_dev();
136 env_mmc_orig_hwpart
= mmc_get_blk_desc(mmc
)->hwpart
;
137 ret
= blk_select_hwpart_devnum(IF_TYPE_MMC
, dev
, part
);
139 puts("MMC partition switch failed\n");
144 static inline int mmc_set_env_part(struct mmc
*mmc
) {return 0; };
147 static const char *init_mmc_for_env(struct mmc
*mmc
)
150 return "No MMC card found";
152 #if CONFIG_IS_ENABLED(BLK)
155 if (blk_get_from_parent(mmc
->dev
, &dev
))
156 return "No block device";
159 return "MMC init failed";
161 if (mmc_set_env_part(mmc
))
162 return "MMC partition switch failed";
167 static void fini_mmc_for_env(struct mmc
*mmc
)
169 #ifdef CONFIG_SYS_MMC_ENV_PART
170 int dev
= mmc_get_env_dev();
172 blk_select_hwpart_devnum(IF_TYPE_MMC
, dev
, env_mmc_orig_hwpart
);
176 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
177 static inline int write_env(struct mmc
*mmc
, unsigned long size
,
178 unsigned long offset
, const void *buffer
)
180 uint blk_start
, blk_cnt
, n
;
181 struct blk_desc
*desc
= mmc_get_blk_desc(mmc
);
183 blk_start
= ALIGN(offset
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
184 blk_cnt
= ALIGN(size
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
186 n
= blk_dwrite(desc
, blk_start
, blk_cnt
, (u_char
*)buffer
);
188 return (n
== blk_cnt
) ? 0 : -1;
191 static int env_mmc_save(void)
193 ALLOC_CACHE_ALIGN_BUFFER(env_t
, env_new
, 1);
194 int dev
= mmc_get_env_dev();
195 struct mmc
*mmc
= find_mmc_device(dev
);
200 errmsg
= init_mmc_for_env(mmc
);
202 printf("%s\n", errmsg
);
206 ret
= env_export(env_new
);
210 #ifdef CONFIG_ENV_OFFSET_REDUND
211 if (gd
->env_valid
== ENV_VALID
)
215 if (mmc_get_env_addr(mmc
, copy
, &offset
)) {
220 printf("Writing to %sMMC(%d)... ", copy
? "redundant " : "", dev
);
221 if (write_env(mmc
, CONFIG_ENV_SIZE
, offset
, (u_char
*)env_new
)) {
229 #ifdef CONFIG_ENV_OFFSET_REDUND
230 gd
->env_valid
= gd
->env_valid
== ENV_REDUND
? ENV_VALID
: ENV_REDUND
;
234 fini_mmc_for_env(mmc
);
238 #if defined(CONFIG_CMD_ERASEENV)
239 static inline int erase_env(struct mmc
*mmc
, unsigned long size
,
240 unsigned long offset
)
242 uint blk_start
, blk_cnt
, n
;
243 struct blk_desc
*desc
= mmc_get_blk_desc(mmc
);
245 blk_start
= ALIGN(offset
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
246 blk_cnt
= ALIGN(size
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
248 n
= blk_derase(desc
, blk_start
, blk_cnt
);
249 printf("%d blocks erased: %s\n", n
, (n
== blk_cnt
) ? "OK" : "ERROR");
251 return (n
== blk_cnt
) ? 0 : 1;
254 static int env_mmc_erase(void)
256 int dev
= mmc_get_env_dev();
257 struct mmc
*mmc
= find_mmc_device(dev
);
262 errmsg
= init_mmc_for_env(mmc
);
264 printf("%s\n", errmsg
);
268 if (mmc_get_env_addr(mmc
, copy
, &offset
))
269 return CMD_RET_FAILURE
;
271 ret
= erase_env(mmc
, CONFIG_ENV_SIZE
, offset
);
273 #ifdef CONFIG_ENV_OFFSET_REDUND
276 if (mmc_get_env_addr(mmc
, copy
, &offset
))
277 return CMD_RET_FAILURE
;
279 ret
|= erase_env(mmc
, CONFIG_ENV_SIZE
, offset
);
284 #endif /* CONFIG_CMD_ERASEENV */
285 #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
287 static inline int read_env(struct mmc
*mmc
, unsigned long size
,
288 unsigned long offset
, const void *buffer
)
290 uint blk_start
, blk_cnt
, n
;
291 struct blk_desc
*desc
= mmc_get_blk_desc(mmc
);
293 blk_start
= ALIGN(offset
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
294 blk_cnt
= ALIGN(size
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
296 n
= blk_dread(desc
, blk_start
, blk_cnt
, (uchar
*)buffer
);
298 return (n
== blk_cnt
) ? 0 : -1;
301 #ifdef CONFIG_ENV_OFFSET_REDUND
302 static int env_mmc_load(void)
304 #if !defined(ENV_IS_EMBEDDED)
306 u32 offset1
, offset2
;
307 int read1_fail
= 0, read2_fail
= 0;
309 int dev
= mmc_get_env_dev();
310 const char *errmsg
= NULL
;
312 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env1
, 1);
313 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env2
, 1);
315 mmc_initialize(NULL
);
317 mmc
= find_mmc_device(dev
);
319 errmsg
= init_mmc_for_env(mmc
);
325 if (mmc_get_env_addr(mmc
, 0, &offset1
) ||
326 mmc_get_env_addr(mmc
, 1, &offset2
)) {
331 read1_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset1
, tmp_env1
);
332 read2_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset2
, tmp_env2
);
334 ret
= env_import_redund((char *)tmp_env1
, read1_fail
, (char *)tmp_env2
,
338 fini_mmc_for_env(mmc
);
341 env_set_default(errmsg
, 0);
346 #else /* ! CONFIG_ENV_OFFSET_REDUND */
347 static int env_mmc_load(void)
349 #if !defined(ENV_IS_EMBEDDED)
350 ALLOC_CACHE_ALIGN_BUFFER(char, buf
, CONFIG_ENV_SIZE
);
354 int dev
= mmc_get_env_dev();
357 mmc
= find_mmc_device(dev
);
359 errmsg
= init_mmc_for_env(mmc
);
365 if (mmc_get_env_addr(mmc
, 0, &offset
)) {
370 if (read_env(mmc
, CONFIG_ENV_SIZE
, offset
, buf
)) {
371 errmsg
= "!read failed";
376 ret
= env_import(buf
, 1);
379 fini_mmc_for_env(mmc
);
382 env_set_default(errmsg
, 0);
386 #endif /* CONFIG_ENV_OFFSET_REDUND */
388 U_BOOT_ENV_LOCATION(mmc
) = {
389 .location
= ENVL_MMC
,
391 .load
= env_mmc_load
,
392 #ifndef CONFIG_SPL_BUILD
393 .save
= env_save_ptr(env_mmc_save
),
394 #if defined(CONFIG_CMD_ERASEENV)
395 .erase
= env_mmc_erase
,