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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (c) Copyright 2012 by National Instruments,
4 * Joe Hershberger <joe.hershberger@ni.com>
5 */
6
7#include <asm/global_data.h>
8
9#include <command.h>
10#include <env.h>
11#include <env_internal.h>
12#include <errno.h>
13#include <malloc.h>
14#include <memalign.h>
15#include <search.h>
16#include <ubi_uboot.h>
17#undef crc32
18
19#define _QUOTE(x) #x
20#define QUOTE(x) _QUOTE(x)
21
22#if (CONFIG_ENV_UBI_VID_OFFSET == 0)
23 #define UBI_VID_OFFSET NULL
24#else
25 #define UBI_VID_OFFSET QUOTE(CONFIG_ENV_UBI_VID_OFFSET)
26#endif
27
28DECLARE_GLOBAL_DATA_PTR;
29
30#if CONFIG_SYS_REDUNDAND_ENVIRONMENT
31#define ENV_UBI_VOLUME_REDUND CONFIG_ENV_UBI_VOLUME_REDUND
32#else
33#define ENV_UBI_VOLUME_REDUND "invalid"
34#endif
35
36#ifdef CONFIG_CMD_SAVEENV
37#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
38static int env_ubi_save(void)
39{
40 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
41 int ret;
42
43 ret = env_export(env_new);
44 if (ret)
45 return ret;
46
47 if (ubi_part(CONFIG_ENV_UBI_PART, UBI_VID_OFFSET)) {
48 printf("\n** Cannot find mtd partition \"%s\"\n",
49 CONFIG_ENV_UBI_PART);
50 return 1;
51 }
52
53 if (gd->env_valid == ENV_VALID) {
54 puts("Writing to redundant UBI... ");
55 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND,
56 (void *)env_new, 0, CONFIG_ENV_SIZE)) {
57 printf("\n** Unable to write env to %s:%s **\n",
58 CONFIG_ENV_UBI_PART,
59 CONFIG_ENV_UBI_VOLUME_REDUND);
60 return 1;
61 }
62 } else {
63 puts("Writing to UBI... ");
64 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME,
65 (void *)env_new, 0, CONFIG_ENV_SIZE)) {
66 printf("\n** Unable to write env to %s:%s **\n",
67 CONFIG_ENV_UBI_PART,
68 CONFIG_ENV_UBI_VOLUME);
69 return 1;
70 }
71 }
72
73 puts("done\n");
74
75 gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
76
77 return 0;
78}
79#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
80static int env_ubi_save(void)
81{
82 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
83 int ret;
84
85 ret = env_export(env_new);
86 if (ret)
87 return ret;
88
89 if (ubi_part(CONFIG_ENV_UBI_PART, UBI_VID_OFFSET)) {
90 printf("\n** Cannot find mtd partition \"%s\"\n",
91 CONFIG_ENV_UBI_PART);
92 return 1;
93 }
94
95 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, (void *)env_new, 0,
96 CONFIG_ENV_SIZE)) {
97 printf("\n** Unable to write env to %s:%s **\n",
98 CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
99 return 1;
100 }
101
102 puts("done\n");
103 return 0;
104}
105#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
106#endif /* CONFIG_CMD_SAVEENV */
107
108#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
109static int env_ubi_load(void)
110{
111 ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE);
112 ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE);
113 int read1_fail, read2_fail;
114 env_t *tmp_env1, *tmp_env2;
115
116 /*
117 * In case we have restarted u-boot there is a chance that buffer
118 * contains old environment (from the previous boot).
119 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
120 * buffer.
121 * We need to clear buffer manually here, so the invalid CRC will
122 * cause setting default environment as expected.
123 */
124 memset(env1_buf, 0x0, CONFIG_ENV_SIZE);
125 memset(env2_buf, 0x0, CONFIG_ENV_SIZE);
126
127 tmp_env1 = (env_t *)env1_buf;
128 tmp_env2 = (env_t *)env2_buf;
129
130 if (ubi_part(CONFIG_ENV_UBI_PART, UBI_VID_OFFSET)) {
131 printf("\n** Cannot find mtd partition \"%s\"\n",
132 CONFIG_ENV_UBI_PART);
133 env_set_default(NULL, 0);
134 return -EIO;
135 }
136
137 read1_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1, 0,
138 CONFIG_ENV_SIZE);
139 if (read1_fail)
140 printf("\n** Unable to read env from %s:%s **\n",
141 CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
142
143 read2_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND,
144 (void *)tmp_env2, 0, CONFIG_ENV_SIZE);
145 if (read2_fail)
146 printf("\n** Unable to read redundant env from %s:%s **\n",
147 CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND);
148
149 return env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
150 read2_fail, H_EXTERNAL);
151}
152#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
153static int env_ubi_load(void)
154{
155 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
156
157 /*
158 * In case we have restarted u-boot there is a chance that buffer
159 * contains old environment (from the previous boot).
160 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
161 * buffer.
162 * We need to clear buffer manually here, so the invalid CRC will
163 * cause setting default environment as expected.
164 */
165 memset(buf, 0x0, CONFIG_ENV_SIZE);
166
167 if (ubi_part(CONFIG_ENV_UBI_PART, UBI_VID_OFFSET)) {
168 printf("\n** Cannot find mtd partition \"%s\"\n",
169 CONFIG_ENV_UBI_PART);
170 env_set_default(NULL, 0);
171 return -EIO;
172 }
173
174 if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, buf, 0, CONFIG_ENV_SIZE)) {
175 printf("\n** Unable to read env from %s:%s **\n",
176 CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
177 env_set_default(NULL, 0);
178 return -EIO;
179 }
180
181 return env_import(buf, 1, H_EXTERNAL);
182}
183#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
184
185static int env_ubi_erase(void)
186{
187 ALLOC_CACHE_ALIGN_BUFFER(char, env_buf, CONFIG_ENV_SIZE);
188 int ret = 0;
189
190 if (ubi_part(CONFIG_ENV_UBI_PART, UBI_VID_OFFSET)) {
191 printf("\n** Cannot find mtd partition \"%s\"\n",
192 CONFIG_ENV_UBI_PART);
193 return 1;
194 }
195
196 memset(env_buf, 0x0, CONFIG_ENV_SIZE);
197
198 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME,
199 (void *)env_buf, 0, CONFIG_ENV_SIZE)) {
200 printf("\n** Unable to erase env to %s:%s **\n",
201 CONFIG_ENV_UBI_PART,
202 CONFIG_ENV_UBI_VOLUME);
203 ret = 1;
204 }
205 if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) {
206 if (ubi_volume_write(ENV_UBI_VOLUME_REDUND,
207 (void *)env_buf, 0, CONFIG_ENV_SIZE)) {
208 printf("\n** Unable to erase env to %s:%s **\n",
209 CONFIG_ENV_UBI_PART,
210 ENV_UBI_VOLUME_REDUND);
211 ret = 1;
212 }
213 }
214
215 return ret;
216}
217
218U_BOOT_ENV_LOCATION(ubi) = {
219 .location = ENVL_UBI,
220 ENV_NAME("UBI")
221 .load = env_ubi_load,
222 .save = env_save_ptr(env_ubi_save),
223 .erase = ENV_ERASE_PTR(env_ubi_erase),
224};