flash.c 9.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2000-2010
  4. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  5. *
  6. * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  7. * Andreas Heppel <aheppel@sysgo.de>
  8. */
  9. /* #define DEBUG */
  10. #include <common.h>
  11. #include <command.h>
  12. #include <env.h>
  13. #include <env_internal.h>
  14. #include <flash.h>
  15. #include <log.h>
  16. #include <asm/global_data.h>
  17. #include <linux/stddef.h>
  18. #include <malloc.h>
  19. #include <search.h>
  20. #include <errno.h>
  21. #include <u-boot/crc.h>
  22. DECLARE_GLOBAL_DATA_PTR;
  23. #ifndef CONFIG_SPL_BUILD
  24. # if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
  25. # define CMD_SAVEENV
  26. # elif defined(CONFIG_ENV_ADDR_REDUND)
  27. # error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
  28. # endif
  29. #endif
  30. /* TODO(sjg@chromium.org): Figure out all these special cases */
  31. #if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
  32. !defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
  33. !defined(CONFIG_TARGET_EDMINIV2)) || \
  34. !defined(CONFIG_SPL_BUILD)
  35. #define LOADENV
  36. #endif
  37. #if !defined(CONFIG_TARGET_X600) || !defined(CONFIG_SPL_BUILD)
  38. #define INITENV
  39. #endif
  40. #if defined(CONFIG_ENV_ADDR_REDUND) && defined(CMD_SAVEENV) || \
  41. !defined(CONFIG_ENV_ADDR_REDUND) && defined(INITENV)
  42. #ifdef ENV_IS_EMBEDDED
  43. static env_t *env_ptr = &embedded_environment;
  44. #else /* ! ENV_IS_EMBEDDED */
  45. static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
  46. #endif /* ENV_IS_EMBEDDED */
  47. #endif
  48. static __maybe_unused env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
  49. /* CONFIG_ENV_ADDR is supposed to be on sector boundary */
  50. static ulong __maybe_unused end_addr =
  51. CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
  52. #ifdef CONFIG_ENV_ADDR_REDUND
  53. static env_t __maybe_unused *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
  54. /* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
  55. static ulong __maybe_unused end_addr_new =
  56. CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
  57. #endif /* CONFIG_ENV_ADDR_REDUND */
  58. #ifdef CONFIG_ENV_ADDR_REDUND
  59. #ifdef INITENV
  60. static int env_flash_init(void)
  61. {
  62. int crc1_ok = 0, crc2_ok = 0;
  63. uchar flag1 = flash_addr->flags;
  64. uchar flag2 = flash_addr_new->flags;
  65. ulong addr1 = (ulong)&(flash_addr->data);
  66. ulong addr2 = (ulong)&(flash_addr_new->data);
  67. crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
  68. crc2_ok =
  69. crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
  70. if (crc1_ok && !crc2_ok) {
  71. gd->env_addr = addr1;
  72. gd->env_valid = ENV_VALID;
  73. } else if (!crc1_ok && crc2_ok) {
  74. gd->env_addr = addr2;
  75. gd->env_valid = ENV_VALID;
  76. } else if (!crc1_ok && !crc2_ok) {
  77. gd->env_valid = ENV_INVALID;
  78. } else if (flag1 == ENV_REDUND_ACTIVE &&
  79. flag2 == ENV_REDUND_OBSOLETE) {
  80. gd->env_addr = addr1;
  81. gd->env_valid = ENV_VALID;
  82. } else if (flag1 == ENV_REDUND_OBSOLETE &&
  83. flag2 == ENV_REDUND_ACTIVE) {
  84. gd->env_addr = addr2;
  85. gd->env_valid = ENV_VALID;
  86. } else if (flag1 == flag2) {
  87. gd->env_addr = addr1;
  88. gd->env_valid = ENV_REDUND;
  89. } else if (flag1 == 0xFF) {
  90. gd->env_addr = addr1;
  91. gd->env_valid = ENV_REDUND;
  92. } else if (flag2 == 0xFF) {
  93. gd->env_addr = addr2;
  94. gd->env_valid = ENV_REDUND;
  95. }
  96. return 0;
  97. }
  98. #endif
  99. #ifdef CMD_SAVEENV
  100. static int env_flash_save(void)
  101. {
  102. env_t env_new;
  103. char *saved_data = NULL;
  104. char flag = ENV_REDUND_OBSOLETE, new_flag = ENV_REDUND_ACTIVE;
  105. int rc = 1;
  106. #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
  107. ulong up_data = 0;
  108. #endif
  109. debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
  110. if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
  111. goto done;
  112. debug("Protect off %08lX ... %08lX\n",
  113. (ulong)flash_addr_new, end_addr_new);
  114. if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
  115. goto done;
  116. rc = env_export(&env_new);
  117. if (rc)
  118. return rc;
  119. env_new.flags = new_flag;
  120. #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
  121. up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
  122. debug("Data to save 0x%lX\n", up_data);
  123. if (up_data) {
  124. saved_data = malloc(up_data);
  125. if (saved_data == NULL) {
  126. printf("Unable to save the rest of sector (%ld)\n",
  127. up_data);
  128. goto done;
  129. }
  130. memcpy(saved_data,
  131. (void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
  132. up_data);
  133. debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
  134. (long)flash_addr_new + CONFIG_ENV_SIZE,
  135. up_data, saved_data);
  136. }
  137. #endif
  138. puts("Erasing Flash...");
  139. debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
  140. if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
  141. goto done;
  142. puts("Writing to Flash... ");
  143. debug(" %08lX ... %08lX ...",
  144. (ulong)&(flash_addr_new->data),
  145. sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
  146. rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
  147. sizeof(env_new));
  148. if (rc)
  149. goto perror;
  150. rc = flash_write(&flag, (ulong)&(flash_addr->flags),
  151. sizeof(flash_addr->flags));
  152. if (rc)
  153. goto perror;
  154. #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
  155. if (up_data) { /* restore the rest of sector */
  156. debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
  157. (long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
  158. if (flash_write(saved_data,
  159. (long)flash_addr_new + CONFIG_ENV_SIZE,
  160. up_data))
  161. goto perror;
  162. }
  163. #endif
  164. puts("done\n");
  165. {
  166. env_t *etmp = flash_addr;
  167. ulong ltmp = end_addr;
  168. flash_addr = flash_addr_new;
  169. flash_addr_new = etmp;
  170. end_addr = end_addr_new;
  171. end_addr_new = ltmp;
  172. }
  173. rc = 0;
  174. goto done;
  175. perror:
  176. flash_perror(rc);
  177. done:
  178. free(saved_data);
  179. /* try to re-protect */
  180. flash_sect_protect(1, (ulong)flash_addr, end_addr);
  181. flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
  182. return rc;
  183. }
  184. #endif /* CMD_SAVEENV */
  185. #else /* ! CONFIG_ENV_ADDR_REDUND */
  186. #ifdef INITENV
  187. static int env_flash_init(void)
  188. {
  189. if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
  190. gd->env_addr = (ulong)&(env_ptr->data);
  191. gd->env_valid = ENV_VALID;
  192. return 0;
  193. }
  194. gd->env_valid = ENV_INVALID;
  195. return 0;
  196. }
  197. #endif
  198. #ifdef CMD_SAVEENV
  199. static int env_flash_save(void)
  200. {
  201. env_t env_new;
  202. int rc = 1;
  203. char *saved_data = NULL;
  204. #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
  205. ulong up_data = 0;
  206. up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
  207. debug("Data to save 0x%lx\n", up_data);
  208. if (up_data) {
  209. saved_data = malloc(up_data);
  210. if (saved_data == NULL) {
  211. printf("Unable to save the rest of sector (%ld)\n",
  212. up_data);
  213. goto done;
  214. }
  215. memcpy(saved_data,
  216. (void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
  217. debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
  218. (ulong)flash_addr + CONFIG_ENV_SIZE,
  219. up_data,
  220. (ulong)saved_data);
  221. }
  222. #endif /* CONFIG_ENV_SECT_SIZE */
  223. debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
  224. if (flash_sect_protect(0, (long)flash_addr, end_addr))
  225. goto done;
  226. rc = env_export(&env_new);
  227. if (rc)
  228. goto done;
  229. puts("Erasing Flash...");
  230. if (flash_sect_erase((long)flash_addr, end_addr))
  231. goto done;
  232. puts("Writing to Flash... ");
  233. rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
  234. if (rc != 0)
  235. goto perror;
  236. #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
  237. if (up_data) { /* restore the rest of sector */
  238. debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
  239. (ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
  240. if (flash_write(saved_data,
  241. (long)flash_addr + CONFIG_ENV_SIZE,
  242. up_data))
  243. goto perror;
  244. }
  245. #endif
  246. puts("done\n");
  247. rc = 0;
  248. goto done;
  249. perror:
  250. flash_perror(rc);
  251. done:
  252. free(saved_data);
  253. /* try to re-protect */
  254. flash_sect_protect(1, (long)flash_addr, end_addr);
  255. return rc;
  256. }
  257. #endif /* CMD_SAVEENV */
  258. #endif /* CONFIG_ENV_ADDR_REDUND */
  259. #ifdef LOADENV
  260. static int env_flash_load(void)
  261. {
  262. #ifdef CONFIG_ENV_ADDR_REDUND
  263. if (gd->env_addr != (ulong)&(flash_addr->data)) {
  264. env_t *etmp = flash_addr;
  265. ulong ltmp = end_addr;
  266. flash_addr = flash_addr_new;
  267. flash_addr_new = etmp;
  268. end_addr = end_addr_new;
  269. end_addr_new = ltmp;
  270. }
  271. if (flash_addr_new->flags != ENV_REDUND_OBSOLETE &&
  272. crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
  273. char flag = ENV_REDUND_OBSOLETE;
  274. gd->env_valid = ENV_REDUND;
  275. flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
  276. flash_write(&flag,
  277. (ulong)&(flash_addr_new->flags),
  278. sizeof(flash_addr_new->flags));
  279. flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
  280. }
  281. if (flash_addr->flags != ENV_REDUND_ACTIVE &&
  282. (flash_addr->flags & ENV_REDUND_ACTIVE) == ENV_REDUND_ACTIVE) {
  283. char flag = ENV_REDUND_ACTIVE;
  284. gd->env_valid = ENV_REDUND;
  285. flash_sect_protect(0, (ulong)flash_addr, end_addr);
  286. flash_write(&flag,
  287. (ulong)&(flash_addr->flags),
  288. sizeof(flash_addr->flags));
  289. flash_sect_protect(1, (ulong)flash_addr, end_addr);
  290. }
  291. if (gd->env_valid == ENV_REDUND)
  292. puts("*** Warning - some problems detected "
  293. "reading environment; recovered successfully\n\n");
  294. #endif /* CONFIG_ENV_ADDR_REDUND */
  295. return env_import((char *)flash_addr, 1, H_EXTERNAL);
  296. }
  297. #endif /* LOADENV */
  298. U_BOOT_ENV_LOCATION(flash) = {
  299. .location = ENVL_FLASH,
  300. ENV_NAME("Flash")
  301. #ifdef LOADENV
  302. .load = env_flash_load,
  303. #endif
  304. #ifdef CMD_SAVEENV
  305. .save = env_save_ptr(env_flash_save),
  306. #endif
  307. #ifdef INITENV
  308. .init = env_flash_init,
  309. #endif
  310. };