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git.ipfire.org Git - people/ms/u-boot.git/blob - common/env_mmc.c
2 * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
12 #include <environment.h>
13 #include <linux/stddef.h>
19 #if defined(CONFIG_ENV_SIZE_REDUND) && \
20 (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
21 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
24 char *env_name_spec
= "MMC";
26 #ifdef ENV_IS_EMBEDDED
27 env_t
*env_ptr
= &environment
;
28 #else /* ! ENV_IS_EMBEDDED */
30 #endif /* ENV_IS_EMBEDDED */
32 DECLARE_GLOBAL_DATA_PTR
;
34 #if !defined(CONFIG_ENV_OFFSET)
35 #define CONFIG_ENV_OFFSET 0
38 __weak
int mmc_get_env_addr(struct mmc
*mmc
, int copy
, u32
*env_addr
)
42 offset
= CONFIG_ENV_OFFSET
;
43 #ifdef CONFIG_ENV_OFFSET_REDUND
45 offset
= CONFIG_ENV_OFFSET_REDUND
;
49 offset
+= mmc
->capacity
;
59 gd
->env_addr
= (ulong
)&default_environment
[0];
65 #ifdef CONFIG_SYS_MMC_ENV_PART
66 __weak uint
mmc_get_env_part(struct mmc
*mmc
)
68 return CONFIG_SYS_MMC_ENV_PART
;
71 static int mmc_set_env_part(struct mmc
*mmc
)
73 uint part
= mmc_get_env_part(mmc
);
74 int dev
= CONFIG_SYS_MMC_ENV_DEV
;
77 #ifdef CONFIG_SPL_BUILD
81 if (part
!= mmc
->part_num
) {
82 ret
= mmc_switch_part(dev
, part
);
84 puts("MMC partition switch failed\n");
90 static inline int mmc_set_env_part(struct mmc
*mmc
) {return 0; };
93 static int init_mmc_for_env(struct mmc
*mmc
)
96 puts("No MMC card found\n");
101 puts("MMC init failed\n");
105 return mmc_set_env_part(mmc
);
108 static void fini_mmc_for_env(struct mmc
*mmc
)
110 #ifdef CONFIG_SYS_MMC_ENV_PART
111 int dev
= CONFIG_SYS_MMC_ENV_DEV
;
113 #ifdef CONFIG_SPL_BUILD
116 if (mmc_get_env_part(mmc
) != mmc
->part_num
)
117 mmc_switch_part(dev
, mmc
->part_num
);
121 #ifdef CONFIG_CMD_SAVEENV
122 static inline int write_env(struct mmc
*mmc
, unsigned long size
,
123 unsigned long offset
, const void *buffer
)
125 uint blk_start
, blk_cnt
, n
;
127 blk_start
= ALIGN(offset
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
128 blk_cnt
= ALIGN(size
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
130 n
= mmc
->block_dev
.block_write(CONFIG_SYS_MMC_ENV_DEV
, blk_start
,
131 blk_cnt
, (u_char
*)buffer
);
133 return (n
== blk_cnt
) ? 0 : -1;
136 #ifdef CONFIG_ENV_OFFSET_REDUND
137 static unsigned char env_flags
;
142 ALLOC_CACHE_ALIGN_BUFFER(env_t
, env_new
, 1);
143 struct mmc
*mmc
= find_mmc_device(CONFIG_SYS_MMC_ENV_DEV
);
147 if (init_mmc_for_env(mmc
))
150 ret
= env_export(env_new
);
154 #ifdef CONFIG_ENV_OFFSET_REDUND
155 env_new
->flags
= ++env_flags
; /* increase the serial */
157 if (gd
->env_valid
== 1)
161 if (mmc_get_env_addr(mmc
, copy
, &offset
)) {
166 printf("Writing to %sMMC(%d)... ", copy
? "redundant " : "",
167 CONFIG_SYS_MMC_ENV_DEV
);
168 if (write_env(mmc
, CONFIG_ENV_SIZE
, offset
, (u_char
*)env_new
)) {
177 #ifdef CONFIG_ENV_OFFSET_REDUND
178 gd
->env_valid
= gd
->env_valid
== 2 ? 1 : 2;
182 fini_mmc_for_env(mmc
);
185 #endif /* CONFIG_CMD_SAVEENV */
187 static inline int read_env(struct mmc
*mmc
, unsigned long size
,
188 unsigned long offset
, const void *buffer
)
190 uint blk_start
, blk_cnt
, n
;
191 int dev
= CONFIG_SYS_MMC_ENV_DEV
;
193 #ifdef CONFIG_SPL_BUILD
197 blk_start
= ALIGN(offset
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
198 blk_cnt
= ALIGN(size
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
200 n
= mmc
->block_dev
.block_read(dev
, blk_start
, blk_cnt
, (uchar
*)buffer
);
202 return (n
== blk_cnt
) ? 0 : -1;
205 #ifdef CONFIG_ENV_OFFSET_REDUND
206 void env_relocate_spec(void)
208 #if !defined(ENV_IS_EMBEDDED)
210 u32 offset1
, offset2
;
211 int read1_fail
= 0, read2_fail
= 0;
212 int crc1_ok
= 0, crc2_ok
= 0;
215 int dev
= CONFIG_SYS_MMC_ENV_DEV
;
217 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env1
, 1);
218 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env2
, 1);
220 #ifdef CONFIG_SPL_BUILD
224 mmc
= find_mmc_device(dev
);
226 if (init_mmc_for_env(mmc
)) {
231 if (mmc_get_env_addr(mmc
, 0, &offset1
) ||
232 mmc_get_env_addr(mmc
, 1, &offset2
)) {
237 read1_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset1
, tmp_env1
);
238 read2_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset2
, tmp_env2
);
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");
246 crc1_ok
= !read1_fail
&&
247 (crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
);
248 crc2_ok
= !read2_fail
&&
249 (crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
);
251 if (!crc1_ok
&& !crc2_ok
) {
254 } else if (crc1_ok
&& !crc2_ok
) {
256 } else if (!crc1_ok
&& crc2_ok
) {
259 /* both ok - check serial */
260 if (tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
262 else if (tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
264 else if (tmp_env1
->flags
> tmp_env2
->flags
)
266 else if (tmp_env2
->flags
> tmp_env1
->flags
)
268 else /* flags are equal - almost impossible */
274 if (gd
->env_valid
== 1)
279 env_flags
= ep
->flags
;
280 env_import((char *)ep
, 0);
284 fini_mmc_for_env(mmc
);
287 set_default_env(NULL
);
291 #else /* ! CONFIG_ENV_OFFSET_REDUND */
292 void env_relocate_spec(void)
294 #if !defined(ENV_IS_EMBEDDED)
295 ALLOC_CACHE_ALIGN_BUFFER(char, buf
, CONFIG_ENV_SIZE
);
299 int dev
= CONFIG_SYS_MMC_ENV_DEV
;
301 #ifdef CONFIG_SPL_BUILD
305 mmc
= find_mmc_device(dev
);
307 if (init_mmc_for_env(mmc
)) {
312 if (mmc_get_env_addr(mmc
, 0, &offset
)) {
317 if (read_env(mmc
, CONFIG_ENV_SIZE
, offset
, buf
)) {
326 fini_mmc_for_env(mmc
);
329 set_default_env(NULL
);
332 #endif /* CONFIG_ENV_OFFSET_REDUND */