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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 env_mmc_orig_hwpart
= mmc_get_blk_desc(mmc
)->hwpart
;
86 ret
= blk_select_hwpart_devnum(IF_TYPE_MMC
, dev
, part
);
88 puts("MMC partition switch failed\n");
93 static inline int mmc_set_env_part(struct mmc
*mmc
) {return 0; };
96 static const char *init_mmc_for_env(struct mmc
*mmc
)
99 return "!No MMC card found";
102 return "!MMC init failed";
104 if (mmc_set_env_part(mmc
))
105 return "!MMC partition switch failed";
110 static void fini_mmc_for_env(struct mmc
*mmc
)
112 #ifdef CONFIG_SYS_MMC_ENV_PART
113 int dev
= mmc_get_env_dev();
115 blk_select_hwpart_devnum(IF_TYPE_MMC
, dev
, env_mmc_orig_hwpart
);
119 #ifdef CONFIG_CMD_SAVEENV
120 static inline int write_env(struct mmc
*mmc
, unsigned long size
,
121 unsigned long offset
, const void *buffer
)
123 uint blk_start
, blk_cnt
, n
;
124 struct blk_desc
*desc
= mmc_get_blk_desc(mmc
);
126 blk_start
= ALIGN(offset
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
127 blk_cnt
= ALIGN(size
, mmc
->write_bl_len
) / mmc
->write_bl_len
;
129 n
= blk_dwrite(desc
, blk_start
, blk_cnt
, (u_char
*)buffer
);
131 return (n
== blk_cnt
) ? 0 : -1;
134 #ifdef CONFIG_ENV_OFFSET_REDUND
135 static unsigned char env_flags
;
140 ALLOC_CACHE_ALIGN_BUFFER(env_t
, env_new
, 1);
141 int dev
= mmc_get_env_dev();
142 struct mmc
*mmc
= find_mmc_device(dev
);
147 errmsg
= init_mmc_for_env(mmc
);
149 printf("%s\n", errmsg
);
153 ret
= env_export(env_new
);
157 #ifdef CONFIG_ENV_OFFSET_REDUND
158 env_new
->flags
= ++env_flags
; /* increase the serial */
160 if (gd
->env_valid
== 1)
164 if (mmc_get_env_addr(mmc
, copy
, &offset
)) {
169 printf("Writing to %sMMC(%d)... ", copy
? "redundant " : "", dev
);
170 if (write_env(mmc
, CONFIG_ENV_SIZE
, offset
, (u_char
*)env_new
)) {
179 #ifdef CONFIG_ENV_OFFSET_REDUND
180 gd
->env_valid
= gd
->env_valid
== 2 ? 1 : 2;
184 fini_mmc_for_env(mmc
);
187 #endif /* CONFIG_CMD_SAVEENV */
189 static inline int read_env(struct mmc
*mmc
, unsigned long size
,
190 unsigned long offset
, const void *buffer
)
192 uint blk_start
, blk_cnt
, n
;
193 struct blk_desc
*desc
= mmc_get_blk_desc(mmc
);
195 blk_start
= ALIGN(offset
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
196 blk_cnt
= ALIGN(size
, mmc
->read_bl_len
) / mmc
->read_bl_len
;
198 n
= blk_dread(desc
, blk_start
, blk_cnt
, (uchar
*)buffer
);
200 return (n
== blk_cnt
) ? 0 : -1;
203 #ifdef CONFIG_ENV_OFFSET_REDUND
204 void env_relocate_spec(void)
206 #if !defined(ENV_IS_EMBEDDED)
208 u32 offset1
, offset2
;
209 int read1_fail
= 0, read2_fail
= 0;
210 int crc1_ok
= 0, crc2_ok
= 0;
213 int dev
= mmc_get_env_dev();
214 const char *errmsg
= NULL
;
216 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env1
, 1);
217 ALLOC_CACHE_ALIGN_BUFFER(env_t
, tmp_env2
, 1);
219 mmc
= find_mmc_device(dev
);
221 errmsg
= init_mmc_for_env(mmc
);
227 if (mmc_get_env_addr(mmc
, 0, &offset1
) ||
228 mmc_get_env_addr(mmc
, 1, &offset2
)) {
233 read1_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset1
, tmp_env1
);
234 read2_fail
= read_env(mmc
, CONFIG_ENV_SIZE
, offset2
, tmp_env2
);
236 if (read1_fail
&& read2_fail
)
237 puts("*** Error - No Valid Environment Area found\n");
238 else if (read1_fail
|| read2_fail
)
239 puts("*** Warning - some problems detected "
240 "reading environment; recovered successfully\n");
242 crc1_ok
= !read1_fail
&&
243 (crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
);
244 crc2_ok
= !read2_fail
&&
245 (crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
);
247 if (!crc1_ok
&& !crc2_ok
) {
251 } else if (crc1_ok
&& !crc2_ok
) {
253 } else if (!crc1_ok
&& crc2_ok
) {
256 /* both ok - check serial */
257 if (tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
259 else if (tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
261 else if (tmp_env1
->flags
> tmp_env2
->flags
)
263 else if (tmp_env2
->flags
> tmp_env1
->flags
)
265 else /* flags are equal - almost impossible */
271 if (gd
->env_valid
== 1)
276 env_flags
= ep
->flags
;
277 env_import((char *)ep
, 0);
281 fini_mmc_for_env(mmc
);
284 set_default_env(errmsg
);
287 #else /* ! CONFIG_ENV_OFFSET_REDUND */
288 void env_relocate_spec(void)
290 #if !defined(ENV_IS_EMBEDDED)
291 ALLOC_CACHE_ALIGN_BUFFER(char, buf
, CONFIG_ENV_SIZE
);
295 int dev
= mmc_get_env_dev();
298 mmc
= find_mmc_device(dev
);
300 errmsg
= init_mmc_for_env(mmc
);
306 if (mmc_get_env_addr(mmc
, 0, &offset
)) {
311 if (read_env(mmc
, CONFIG_ENV_SIZE
, offset
, buf
)) {
312 errmsg
= "!read failed";
321 fini_mmc_for_env(mmc
);
324 set_default_env(errmsg
);
327 #endif /* CONFIG_ENV_OFFSET_REDUND */