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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>
20 #if defined(CONFIG_ENV_SIZE_REDUND) && \
21 (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
22 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
25 char *env_name_spec
= "MMC";
27 #ifdef ENV_IS_EMBEDDED
28 env_t
*env_ptr
= &environment
;
29 #else /* ! ENV_IS_EMBEDDED */
31 #endif /* ENV_IS_EMBEDDED */
33 DECLARE_GLOBAL_DATA_PTR
;
35 #if !defined(CONFIG_ENV_OFFSET)
36 #define CONFIG_ENV_OFFSET 0
39 __weak
int mmc_get_env_addr(struct mmc
*mmc
, int copy
, u32
*env_addr
)
43 offset
= CONFIG_ENV_OFFSET
;
44 #ifdef CONFIG_ENV_OFFSET_REDUND
46 offset
= CONFIG_ENV_OFFSET_REDUND
;
50 offset
+= mmc
->capacity
;
57 __weak
int mmc_get_env_dev(void)
59 return CONFIG_SYS_MMC_ENV_DEV
;
65 gd
->env_addr
= (ulong
)&default_environment
[0];
71 #ifdef CONFIG_SYS_MMC_ENV_PART
72 __weak uint
mmc_get_env_part(struct mmc
*mmc
)
74 return CONFIG_SYS_MMC_ENV_PART
;
77 static unsigned char env_mmc_orig_hwpart
;
79 static int mmc_set_env_part(struct mmc
*mmc
)
81 uint part
= mmc_get_env_part(mmc
);
82 int dev
= mmc_get_env_dev();
85 #ifdef CONFIG_SPL_BUILD
89 env_mmc_orig_hwpart
= mmc_get_blk_desc(mmc
)->hwpart
;
90 ret
= blk_select_hwpart_devnum(IF_TYPE_MMC
, dev
, part
);
92 puts("MMC partition switch failed\n");
97 static inline int mmc_set_env_part(struct mmc
*mmc
) {return 0; };
100 static const char *init_mmc_for_env(struct mmc
*mmc
)
103 return "!No MMC card found";
106 return "!MMC init failed";
108 if (mmc_set_env_part(mmc
))
109 return "!MMC partition switch failed";
114 static void fini_mmc_for_env(struct mmc
*mmc
)
116 #ifdef CONFIG_SYS_MMC_ENV_PART
117 int dev
= mmc_get_env_dev();
119 #ifdef CONFIG_SPL_BUILD
122 blk_select_hwpart_devnum(IF_TYPE_MMC
, dev
, env_mmc_orig_hwpart
);
126 #ifdef CONFIG_CMD_SAVEENV
127 static inline int write_env(struct mmc
*mmc
, unsigned long size
,
128 unsigned long offset
, const void *buffer
)
130 uint blk_start
, blk_cnt
, n
;
132 blk_start
= ALIGN(offset
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
133 blk_cnt
= ALIGN(size
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
135 n
= mmc
->block_dev
.block_write(&mmc
->block_dev
, blk_start
,
136 blk_cnt
, (u_char
*)buffer
);
138 return (n
== blk_cnt
) ? 0 : -1;
141 #ifdef CONFIG_ENV_OFFSET_REDUND
142 static unsigned char env_flags
;
147 ALLOC_CACHE_ALIGN_BUFFER(env_t
, env_new
, 1);
148 int dev
= mmc_get_env_dev();
149 struct mmc
*mmc
= find_mmc_device(dev
);
154 errmsg
= init_mmc_for_env(mmc
);
156 printf("%s\n", errmsg
);
160 ret
= env_export(env_new
);
164 #ifdef CONFIG_ENV_OFFSET_REDUND
165 env_new
->flags
= ++env_flags
; /* increase the serial */
167 if (gd
->env_valid
== 1)
171 if (mmc_get_env_addr(mmc
, copy
, &offset
)) {
176 printf("Writing to %sMMC(%d)... ", copy
? "redundant " : "", dev
);
177 if (write_env(mmc
, CONFIG_ENV_SIZE
, offset
, (u_char
*)env_new
)) {
186 #ifdef CONFIG_ENV_OFFSET_REDUND
187 gd
->env_valid
= gd
->env_valid
== 2 ? 1 : 2;
191 fini_mmc_for_env(mmc
);
194 #endif /* CONFIG_CMD_SAVEENV */
196 static inline int read_env(struct mmc
*mmc
, unsigned long size
,
197 unsigned long offset
, const void *buffer
)
199 uint blk_start
, blk_cnt
, n
;
201 blk_start
= ALIGN(offset
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
202 blk_cnt
= ALIGN(size
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
204 n
= mmc
->block_dev
.block_read(&mmc
->block_dev
, blk_start
, blk_cnt
,
207 return (n
== blk_cnt
) ? 0 : -1;
210 #ifdef CONFIG_ENV_OFFSET_REDUND
211 void env_relocate_spec(void)
213 #if !defined(ENV_IS_EMBEDDED)
215 u32 offset1
, offset2
;
216 int read1_fail
= 0, read2_fail
= 0;
217 int crc1_ok
= 0, crc2_ok
= 0;
220 int dev
= mmc_get_env_dev();
221 const char *errmsg
= NULL
;
223 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env1
, 1);
224 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env2
, 1);
226 #ifdef CONFIG_SPL_BUILD
230 mmc
= find_mmc_device(dev
);
232 errmsg
= init_mmc_for_env(mmc
);
238 if (mmc_get_env_addr(mmc
, 0, &offset1
) ||
239 mmc_get_env_addr(mmc
, 1, &offset2
)) {
244 read1_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset1
, tmp_env1
);
245 read2_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset2
, tmp_env2
);
247 if (read1_fail
&& read2_fail
)
248 puts("*** Error - No Valid Environment Area found\n");
249 else if (read1_fail
|| read2_fail
)
250 puts("*** Warning - some problems detected "
251 "reading environment; recovered successfully\n");
253 crc1_ok
= !read1_fail
&&
254 (crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
);
255 crc2_ok
= !read2_fail
&&
256 (crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
);
258 if (!crc1_ok
&& !crc2_ok
) {
262 } else if (crc1_ok
&& !crc2_ok
) {
264 } else if (!crc1_ok
&& crc2_ok
) {
267 /* both ok - check serial */
268 if (tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
270 else if (tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
272 else if (tmp_env1
->flags
> tmp_env2
->flags
)
274 else if (tmp_env2
->flags
> tmp_env1
->flags
)
276 else /* flags are equal - almost impossible */
282 if (gd
->env_valid
== 1)
287 env_flags
= ep
->flags
;
288 env_import((char *)ep
, 0);
292 fini_mmc_for_env(mmc
);
295 set_default_env(errmsg
);
298 #else /* ! CONFIG_ENV_OFFSET_REDUND */
299 void env_relocate_spec(void)
301 #if !defined(ENV_IS_EMBEDDED)
302 ALLOC_CACHE_ALIGN_BUFFER(char, buf
, CONFIG_ENV_SIZE
);
306 int dev
= mmc_get_env_dev();
309 #ifdef CONFIG_SPL_BUILD
313 mmc
= find_mmc_device(dev
);
315 errmsg
= init_mmc_for_env(mmc
);
321 if (mmc_get_env_addr(mmc
, 0, &offset
)) {
326 if (read_env(mmc
, CONFIG_ENV_SIZE
, offset
, buf
)) {
327 errmsg
= "!read failed";
336 fini_mmc_for_env(mmc
);
339 set_default_env(errmsg
);
342 #endif /* CONFIG_ENV_OFFSET_REDUND */