2 * (c) Copyright 2012 by National Instruments,
3 * Joe Hershberger <joe.hershberger@ni.com>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <environment.h>
16 #include <ubi_uboot.h>
19 char *env_name_spec
= "UBI";
23 DECLARE_GLOBAL_DATA_PTR
;
28 gd
->env_addr
= (ulong
)&default_environment
[0];
34 #ifdef CONFIG_CMD_SAVEENV
35 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
36 static unsigned char env_flags
;
40 ALLOC_CACHE_ALIGN_BUFFER(env_t
, env_new
, 1);
43 ret
= env_export(env_new
);
47 if (ubi_part(CONFIG_ENV_UBI_PART
, NULL
)) {
48 printf("\n** Cannot find mtd partition \"%s\"\n",
53 env_new
->flags
= ++env_flags
; /* increase the serial */
55 if (gd
->env_valid
== 1) {
56 puts("Writing to redundant UBI... ");
57 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND
,
58 (void *)env_new
, CONFIG_ENV_SIZE
)) {
59 printf("\n** Unable to write env to %s:%s **\n",
61 CONFIG_ENV_UBI_VOLUME_REDUND
);
65 puts("Writing to UBI... ");
66 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME
,
67 (void *)env_new
, CONFIG_ENV_SIZE
)) {
68 printf("\n** Unable to write env to %s:%s **\n",
70 CONFIG_ENV_UBI_VOLUME
);
77 gd
->env_valid
= gd
->env_valid
== 2 ? 1 : 2;
81 #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
84 ALLOC_CACHE_ALIGN_BUFFER(env_t
, env_new
, 1);
87 ret
= env_export(env_new
);
91 if (ubi_part(CONFIG_ENV_UBI_PART
, NULL
)) {
92 printf("\n** Cannot find mtd partition \"%s\"\n",
97 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME
, (void *)env_new
,
99 printf("\n** Unable to write env to %s:%s **\n",
100 CONFIG_ENV_UBI_PART
, CONFIG_ENV_UBI_VOLUME
);
107 #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
108 #endif /* CONFIG_CMD_SAVEENV */
110 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
111 void env_relocate_spec(void)
113 ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf
, CONFIG_ENV_SIZE
);
114 ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf
, CONFIG_ENV_SIZE
);
115 int crc1_ok
= 0, crc2_ok
= 0;
116 env_t
*ep
, *tmp_env1
, *tmp_env2
;
119 * In case we have restarted u-boot there is a chance that buffer
120 * contains old environment (from the previous boot).
121 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
123 * We need to clear buffer manually here, so the invalid CRC will
124 * cause setting default environment as expected.
126 memset(env1_buf
, 0x0, CONFIG_ENV_SIZE
);
127 memset(env2_buf
, 0x0, CONFIG_ENV_SIZE
);
129 tmp_env1
= (env_t
*)env1_buf
;
130 tmp_env2
= (env_t
*)env2_buf
;
132 if (ubi_part(CONFIG_ENV_UBI_PART
, NULL
)) {
133 printf("\n** Cannot find mtd partition \"%s\"\n",
134 CONFIG_ENV_UBI_PART
);
135 set_default_env(NULL
);
139 if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME
, (void *)tmp_env1
,
141 printf("\n** Unable to read env from %s:%s **\n",
142 CONFIG_ENV_UBI_PART
, CONFIG_ENV_UBI_VOLUME
);
145 if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND
, (void *)tmp_env2
,
147 printf("\n** Unable to read redundant env from %s:%s **\n",
148 CONFIG_ENV_UBI_PART
, CONFIG_ENV_UBI_VOLUME_REDUND
);
151 crc1_ok
= crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
;
152 crc2_ok
= crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
;
154 if (!crc1_ok
&& !crc2_ok
) {
155 set_default_env("!bad CRC");
157 } else if (crc1_ok
&& !crc2_ok
) {
159 } else if (!crc1_ok
&& crc2_ok
) {
162 /* both ok - check serial */
163 if (tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
165 else if (tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
167 else if (tmp_env1
->flags
> tmp_env2
->flags
)
169 else if (tmp_env2
->flags
> tmp_env1
->flags
)
171 else /* flags are equal - almost impossible */
175 if (gd
->env_valid
== 1)
180 env_flags
= ep
->flags
;
181 env_import((char *)ep
, 0);
183 #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
184 void env_relocate_spec(void)
186 ALLOC_CACHE_ALIGN_BUFFER(char, buf
, CONFIG_ENV_SIZE
);
189 * In case we have restarted u-boot there is a chance that buffer
190 * contains old environment (from the previous boot).
191 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
193 * We need to clear buffer manually here, so the invalid CRC will
194 * cause setting default environment as expected.
196 memset(buf
, 0x0, CONFIG_ENV_SIZE
);
198 if (ubi_part(CONFIG_ENV_UBI_PART
, NULL
)) {
199 printf("\n** Cannot find mtd partition \"%s\"\n",
200 CONFIG_ENV_UBI_PART
);
201 set_default_env(NULL
);
205 if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME
, buf
, CONFIG_ENV_SIZE
)) {
206 printf("\n** Unable to read env from %s:%s **\n",
207 CONFIG_ENV_UBI_PART
, CONFIG_ENV_UBI_VOLUME
);
208 set_default_env(NULL
);
214 #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */