2 * (C) Copyright 2000-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
9 * Jian Zhang, Texas Instruments, jzhang@ti.com.
11 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
12 * Andreas Heppel <aheppel@sysgo.de>
14 * SPDX-License-Identifier: GPL-2.0+
19 #include <environment.h>
20 #include <linux/stddef.h>
27 #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
29 #elif defined(CONFIG_ENV_OFFSET_REDUND)
30 #error CONFIG_ENV_OFFSET_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
33 #if defined(CONFIG_ENV_SIZE_REDUND) && \
34 (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
35 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
38 #ifndef CONFIG_ENV_RANGE
39 #define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
42 char *env_name_spec = "NAND";
44 #if defined(ENV_IS_EMBEDDED)
45 env_t *env_ptr = &environment;
46 #elif defined(CONFIG_NAND_ENV_DST)
47 env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
48 #else /* ! ENV_IS_EMBEDDED */
50 #endif /* ENV_IS_EMBEDDED */
52 DECLARE_GLOBAL_DATA_PTR;
55 * This is called before nand_init() so we can't read NAND to
58 * Mark it OK for now. env_relocate() in env_common.c will call our
59 * relocate function which does the real validation.
61 * When using a NAND boot image (like sequoia_nand), the environment
62 * can be embedded or attached to the U-Boot image in NAND flash.
63 * This way the SPL loads not only the U-Boot image from NAND but
64 * also the environment.
68 #if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
69 int crc1_ok = 0, crc2_ok = 0;
72 #ifdef CONFIG_ENV_OFFSET_REDUND
75 tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
76 crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
79 crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
81 if (!crc1_ok && !crc2_ok) {
86 } else if (crc1_ok && !crc2_ok) {
89 #ifdef CONFIG_ENV_OFFSET_REDUND
90 else if (!crc1_ok && crc2_ok) {
93 /* both ok - check serial */
94 if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
96 else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
98 else if (tmp_env1->flags > tmp_env2->flags)
100 else if (tmp_env2->flags > tmp_env1->flags)
102 else /* flags are equal - almost impossible */
106 if (gd->env_valid == 2)
110 if (gd->env_valid == 1)
113 gd->env_addr = (ulong)env_ptr->data;
115 #else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
116 gd->env_addr = (ulong)&default_environment[0];
118 #endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
125 * The legacy NAND code saved the environment in the first NAND device i.e.,
126 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
128 static int writeenv(size_t offset, u_char *buf)
130 size_t end = offset + CONFIG_ENV_RANGE;
131 size_t amount_saved = 0;
132 size_t blocksize, len;
135 blocksize = nand_info[0].erasesize;
136 len = min(blocksize, (size_t)CONFIG_ENV_SIZE);
138 while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
139 if (nand_block_isbad(&nand_info[0], offset)) {
142 char_ptr = &buf[amount_saved];
143 if (nand_write(&nand_info[0], offset, &len, char_ptr))
150 if (amount_saved != CONFIG_ENV_SIZE)
156 struct env_location {
158 const nand_erase_options_t erase_opts;
161 static int erase_and_write_env(const struct env_location *location,
166 printf("Erasing %s...\n", location->name);
167 if (nand_erase_opts(&nand_info[0], &location->erase_opts))
170 printf("Writing to %s... ", location->name);
171 ret = writeenv(location->erase_opts.offset, env_new);
172 puts(ret ? "FAILED!\n" : "OK\n");
177 #ifdef CONFIG_ENV_OFFSET_REDUND
178 static unsigned char env_flags;
184 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
186 static const struct env_location location[] = {
190 .length = CONFIG_ENV_RANGE,
191 .offset = CONFIG_ENV_OFFSET,
194 #ifdef CONFIG_ENV_OFFSET_REDUND
196 .name = "redundant NAND",
198 .length = CONFIG_ENV_RANGE,
199 .offset = CONFIG_ENV_OFFSET_REDUND,
206 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
209 ret = env_export(env_new);
213 #ifdef CONFIG_ENV_OFFSET_REDUND
214 env_new->flags = ++env_flags; /* increase the serial */
215 env_idx = (gd->env_valid == 1);
218 ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
219 #ifdef CONFIG_ENV_OFFSET_REDUND
221 /* preset other copy for next write */
222 gd->env_valid = gd->env_valid == 2 ? 1 : 2;
226 env_idx = (env_idx + 1) & 1;
227 ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
229 printf("Warning: primary env write failed,"
230 " redundancy is lost!\n");
235 #endif /* CMD_SAVEENV */
237 #if defined(CONFIG_SPL_BUILD)
238 static int readenv(size_t offset, u_char *buf)
240 return nand_spl_load_image(offset, CONFIG_ENV_SIZE, buf);
243 static int readenv(size_t offset, u_char *buf)
245 size_t end = offset + CONFIG_ENV_RANGE;
246 size_t amount_loaded = 0;
247 size_t blocksize, len;
250 blocksize = nand_info[0].erasesize;
254 len = min(blocksize, (size_t)CONFIG_ENV_SIZE);
256 while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
257 if (nand_block_isbad(&nand_info[0], offset)) {
260 char_ptr = &buf[amount_loaded];
261 if (nand_read_skip_bad(&nand_info[0], offset,
263 nand_info[0].size, char_ptr))
267 amount_loaded += len;
271 if (amount_loaded != CONFIG_ENV_SIZE)
276 #endif /* #if defined(CONFIG_SPL_BUILD) */
278 #ifdef CONFIG_ENV_OFFSET_OOB
279 int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
281 struct mtd_oob_ops ops;
282 uint32_t oob_buf[ENV_OFFSET_SIZE / sizeof(uint32_t)];
286 ops.mode = MTD_OOB_AUTO;
288 ops.ooblen = ENV_OFFSET_SIZE;
289 ops.oobbuf = (void *)oob_buf;
291 ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
293 printf("error reading OOB block 0\n");
297 if (oob_buf[0] == ENV_OOB_MARKER) {
298 *result = oob_buf[1] * nand->erasesize;
299 } else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
300 *result = oob_buf[1];
302 printf("No dynamic environment marker in OOB block 0\n");
310 #ifdef CONFIG_ENV_OFFSET_REDUND
311 void env_relocate_spec(void)
313 #if !defined(ENV_IS_EMBEDDED)
314 int read1_fail = 0, read2_fail = 0;
315 int crc1_ok = 0, crc2_ok = 0;
316 env_t *ep, *tmp_env1, *tmp_env2;
318 tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
319 tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
320 if (tmp_env1 == NULL || tmp_env2 == NULL) {
321 puts("Can't allocate buffers for environment\n");
322 set_default_env("!malloc() failed");
326 read1_fail = readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1);
327 read2_fail = readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2);
329 if (read1_fail && read2_fail)
330 puts("*** Error - No Valid Environment Area found\n");
331 else if (read1_fail || read2_fail)
332 puts("*** Warning - some problems detected "
333 "reading environment; recovered successfully\n");
335 crc1_ok = !read1_fail &&
336 (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
337 crc2_ok = !read2_fail &&
338 (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
340 if (!crc1_ok && !crc2_ok) {
341 set_default_env("!bad CRC");
343 } else if (crc1_ok && !crc2_ok) {
345 } else if (!crc1_ok && crc2_ok) {
348 /* both ok - check serial */
349 if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
351 else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
353 else if (tmp_env1->flags > tmp_env2->flags)
355 else if (tmp_env2->flags > tmp_env1->flags)
357 else /* flags are equal - almost impossible */
363 if (gd->env_valid == 1)
368 env_flags = ep->flags;
369 env_import((char *)ep, 0);
375 #endif /* ! ENV_IS_EMBEDDED */
377 #else /* ! CONFIG_ENV_OFFSET_REDUND */
379 * The legacy NAND code saved the environment in the first NAND
380 * device i.e., nand_dev_desc + 0. This is also the behaviour using
383 void env_relocate_spec(void)
385 #if !defined(ENV_IS_EMBEDDED)
387 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
389 #if defined(CONFIG_ENV_OFFSET_OOB)
390 ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
392 * If unable to read environment offset from NAND OOB then fall through
393 * to the normal environment reading code below
396 printf("Found Environment offset in OOB..\n");
398 set_default_env("!no env offset in OOB");
403 ret = readenv(CONFIG_ENV_OFFSET, (u_char *)buf);
405 set_default_env("!readenv() failed");
410 #endif /* ! ENV_IS_EMBEDDED */
412 #endif /* CONFIG_ENV_OFFSET_REDUND */