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1 | /* | |
2 | * (C) Copyright 2000-2010 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
6 | * Andreas Heppel <aheppel@sysgo.de> | |
7 | * | |
8 | * (C) Copyright 2008 Atmel Corporation | |
9 | * | |
10 | * SPDX-License-Identifier: GPL-2.0+ | |
11 | */ | |
12 | #include <common.h> | |
13 | #include <environment.h> | |
14 | #include <malloc.h> | |
15 | #include <spi.h> | |
16 | #include <spi_flash.h> | |
17 | #include <search.h> | |
18 | #include <errno.h> | |
19 | ||
20 | #ifndef CONFIG_ENV_SPI_BUS | |
21 | # define CONFIG_ENV_SPI_BUS 0 | |
22 | #endif | |
23 | #ifndef CONFIG_ENV_SPI_CS | |
24 | # define CONFIG_ENV_SPI_CS 0 | |
25 | #endif | |
26 | #ifndef CONFIG_ENV_SPI_MAX_HZ | |
27 | # define CONFIG_ENV_SPI_MAX_HZ 1000000 | |
28 | #endif | |
29 | #ifndef CONFIG_ENV_SPI_MODE | |
30 | # define CONFIG_ENV_SPI_MODE SPI_MODE_3 | |
31 | #endif | |
32 | ||
33 | #ifdef CONFIG_ENV_OFFSET_REDUND | |
34 | static ulong env_offset = CONFIG_ENV_OFFSET; | |
35 | static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND; | |
36 | ||
37 | #define ACTIVE_FLAG 1 | |
38 | #define OBSOLETE_FLAG 0 | |
39 | #endif /* CONFIG_ENV_OFFSET_REDUND */ | |
40 | ||
41 | DECLARE_GLOBAL_DATA_PTR; | |
42 | ||
43 | char *env_name_spec = "SPI Flash"; | |
44 | ||
45 | static struct spi_flash *env_flash; | |
46 | ||
47 | #if defined(CONFIG_ENV_OFFSET_REDUND) | |
48 | int saveenv(void) | |
49 | { | |
50 | env_t env_new; | |
51 | char *saved_buffer = NULL, flag = OBSOLETE_FLAG; | |
52 | u32 saved_size, saved_offset, sector = 1; | |
53 | int ret; | |
54 | ||
55 | if (!env_flash) { | |
56 | env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, | |
57 | CONFIG_ENV_SPI_CS, | |
58 | CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE); | |
59 | if (!env_flash) { | |
60 | set_default_env("!spi_flash_probe() failed"); | |
61 | return 1; | |
62 | } | |
63 | } | |
64 | ||
65 | ret = env_export(&env_new); | |
66 | if (ret) | |
67 | return ret; | |
68 | env_new.flags = ACTIVE_FLAG; | |
69 | ||
70 | if (gd->env_valid == 1) { | |
71 | env_new_offset = CONFIG_ENV_OFFSET_REDUND; | |
72 | env_offset = CONFIG_ENV_OFFSET; | |
73 | } else { | |
74 | env_new_offset = CONFIG_ENV_OFFSET; | |
75 | env_offset = CONFIG_ENV_OFFSET_REDUND; | |
76 | } | |
77 | ||
78 | /* Is the sector larger than the env (i.e. embedded) */ | |
79 | if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { | |
80 | saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE; | |
81 | saved_offset = env_new_offset + CONFIG_ENV_SIZE; | |
82 | saved_buffer = malloc(saved_size); | |
83 | if (!saved_buffer) { | |
84 | ret = 1; | |
85 | goto done; | |
86 | } | |
87 | ret = spi_flash_read(env_flash, saved_offset, | |
88 | saved_size, saved_buffer); | |
89 | if (ret) | |
90 | goto done; | |
91 | } | |
92 | ||
93 | if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) { | |
94 | sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE; | |
95 | if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE) | |
96 | sector++; | |
97 | } | |
98 | ||
99 | puts("Erasing SPI flash..."); | |
100 | ret = spi_flash_erase(env_flash, env_new_offset, | |
101 | sector * CONFIG_ENV_SECT_SIZE); | |
102 | if (ret) | |
103 | goto done; | |
104 | ||
105 | puts("Writing to SPI flash..."); | |
106 | ||
107 | ret = spi_flash_write(env_flash, env_new_offset, | |
108 | CONFIG_ENV_SIZE, &env_new); | |
109 | if (ret) | |
110 | goto done; | |
111 | ||
112 | if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { | |
113 | ret = spi_flash_write(env_flash, saved_offset, | |
114 | saved_size, saved_buffer); | |
115 | if (ret) | |
116 | goto done; | |
117 | } | |
118 | ||
119 | ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags), | |
120 | sizeof(env_new.flags), &flag); | |
121 | if (ret) | |
122 | goto done; | |
123 | ||
124 | puts("done\n"); | |
125 | ||
126 | gd->env_valid = gd->env_valid == 2 ? 1 : 2; | |
127 | ||
128 | printf("Valid environment: %d\n", (int)gd->env_valid); | |
129 | ||
130 | done: | |
131 | if (saved_buffer) | |
132 | free(saved_buffer); | |
133 | ||
134 | return ret; | |
135 | } | |
136 | ||
137 | void env_relocate_spec(void) | |
138 | { | |
139 | int ret; | |
140 | int crc1_ok = 0, crc2_ok = 0; | |
141 | env_t *tmp_env1 = NULL; | |
142 | env_t *tmp_env2 = NULL; | |
143 | env_t *ep = NULL; | |
144 | ||
145 | tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE); | |
146 | tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE); | |
147 | ||
148 | if (!tmp_env1 || !tmp_env2) { | |
149 | set_default_env("!malloc() failed"); | |
150 | goto out; | |
151 | } | |
152 | ||
153 | env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS, | |
154 | CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE); | |
155 | if (!env_flash) { | |
156 | set_default_env("!spi_flash_probe() failed"); | |
157 | goto out; | |
158 | } | |
159 | ||
160 | ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, | |
161 | CONFIG_ENV_SIZE, tmp_env1); | |
162 | if (ret) { | |
163 | set_default_env("!spi_flash_read() failed"); | |
164 | goto err_read; | |
165 | } | |
166 | ||
167 | if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc) | |
168 | crc1_ok = 1; | |
169 | ||
170 | ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND, | |
171 | CONFIG_ENV_SIZE, tmp_env2); | |
172 | if (!ret) { | |
173 | if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc) | |
174 | crc2_ok = 1; | |
175 | } | |
176 | ||
177 | if (!crc1_ok && !crc2_ok) { | |
178 | set_default_env("!bad CRC"); | |
179 | goto err_read; | |
180 | } else if (crc1_ok && !crc2_ok) { | |
181 | gd->env_valid = 1; | |
182 | } else if (!crc1_ok && crc2_ok) { | |
183 | gd->env_valid = 2; | |
184 | } else if (tmp_env1->flags == ACTIVE_FLAG && | |
185 | tmp_env2->flags == OBSOLETE_FLAG) { | |
186 | gd->env_valid = 1; | |
187 | } else if (tmp_env1->flags == OBSOLETE_FLAG && | |
188 | tmp_env2->flags == ACTIVE_FLAG) { | |
189 | gd->env_valid = 2; | |
190 | } else if (tmp_env1->flags == tmp_env2->flags) { | |
191 | gd->env_valid = 2; | |
192 | } else if (tmp_env1->flags == 0xFF) { | |
193 | gd->env_valid = 2; | |
194 | } else { | |
195 | /* | |
196 | * this differs from code in env_flash.c, but I think a sane | |
197 | * default path is desirable. | |
198 | */ | |
199 | gd->env_valid = 2; | |
200 | } | |
201 | ||
202 | if (gd->env_valid == 1) | |
203 | ep = tmp_env1; | |
204 | else | |
205 | ep = tmp_env2; | |
206 | ||
207 | ret = env_import((char *)ep, 0); | |
208 | if (!ret) { | |
209 | error("Cannot import environment: errno = %d\n", errno); | |
210 | set_default_env("env_import failed"); | |
211 | } | |
212 | ||
213 | err_read: | |
214 | spi_flash_free(env_flash); | |
215 | env_flash = NULL; | |
216 | out: | |
217 | free(tmp_env1); | |
218 | free(tmp_env2); | |
219 | } | |
220 | #else | |
221 | int saveenv(void) | |
222 | { | |
223 | u32 saved_size, saved_offset, sector = 1; | |
224 | char *saved_buffer = NULL; | |
225 | int ret = 1; | |
226 | env_t env_new; | |
227 | ||
228 | if (!env_flash) { | |
229 | env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, | |
230 | CONFIG_ENV_SPI_CS, | |
231 | CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE); | |
232 | if (!env_flash) { | |
233 | set_default_env("!spi_flash_probe() failed"); | |
234 | return 1; | |
235 | } | |
236 | } | |
237 | ||
238 | /* Is the sector larger than the env (i.e. embedded) */ | |
239 | if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { | |
240 | saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE; | |
241 | saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE; | |
242 | saved_buffer = malloc(saved_size); | |
243 | if (!saved_buffer) | |
244 | goto done; | |
245 | ||
246 | ret = spi_flash_read(env_flash, saved_offset, | |
247 | saved_size, saved_buffer); | |
248 | if (ret) | |
249 | goto done; | |
250 | } | |
251 | ||
252 | if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) { | |
253 | sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE; | |
254 | if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE) | |
255 | sector++; | |
256 | } | |
257 | ||
258 | ret = env_export(&env_new); | |
259 | if (ret) | |
260 | goto done; | |
261 | ||
262 | puts("Erasing SPI flash..."); | |
263 | ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET, | |
264 | sector * CONFIG_ENV_SECT_SIZE); | |
265 | if (ret) | |
266 | goto done; | |
267 | ||
268 | puts("Writing to SPI flash..."); | |
269 | ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET, | |
270 | CONFIG_ENV_SIZE, &env_new); | |
271 | if (ret) | |
272 | goto done; | |
273 | ||
274 | if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { | |
275 | ret = spi_flash_write(env_flash, saved_offset, | |
276 | saved_size, saved_buffer); | |
277 | if (ret) | |
278 | goto done; | |
279 | } | |
280 | ||
281 | ret = 0; | |
282 | puts("done\n"); | |
283 | ||
284 | done: | |
285 | if (saved_buffer) | |
286 | free(saved_buffer); | |
287 | ||
288 | return ret; | |
289 | } | |
290 | ||
291 | void env_relocate_spec(void) | |
292 | { | |
293 | int ret; | |
294 | char *buf = NULL; | |
295 | ||
296 | buf = (char *)malloc(CONFIG_ENV_SIZE); | |
297 | env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS, | |
298 | CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE); | |
299 | if (!env_flash) { | |
300 | set_default_env("!spi_flash_probe() failed"); | |
301 | if (buf) | |
302 | free(buf); | |
303 | return; | |
304 | } | |
305 | ||
306 | ret = spi_flash_read(env_flash, | |
307 | CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf); | |
308 | if (ret) { | |
309 | set_default_env("!spi_flash_read() failed"); | |
310 | goto out; | |
311 | } | |
312 | ||
313 | ret = env_import(buf, 1); | |
314 | if (ret) | |
315 | gd->env_valid = 1; | |
316 | out: | |
317 | spi_flash_free(env_flash); | |
318 | if (buf) | |
319 | free(buf); | |
320 | env_flash = NULL; | |
321 | } | |
322 | #endif | |
323 | ||
324 | int env_init(void) | |
325 | { | |
326 | /* SPI flash isn't usable before relocation */ | |
327 | gd->env_addr = (ulong)&default_environment[0]; | |
328 | gd->env_valid = 1; | |
329 | ||
330 | return 0; | |
331 | } |