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 */