sf.c 6.5 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. * (C) Copyright 2008 Atmel Corporation
  10. */
  11. #include <common.h>
  12. #include <dm.h>
  13. #include <env.h>
  14. #include <env_internal.h>
  15. #include <malloc.h>
  16. #include <spi.h>
  17. #include <spi_flash.h>
  18. #include <search.h>
  19. #include <errno.h>
  20. #include <dm/device-internal.h>
  21. #ifndef CONFIG_SPL_BUILD
  22. #define CMD_SAVEENV
  23. #define INITENV
  24. #endif
  25. #ifdef CONFIG_ENV_OFFSET_REDUND
  26. #ifdef CMD_SAVEENV
  27. static ulong env_offset = CONFIG_ENV_OFFSET;
  28. static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  29. #endif
  30. #endif /* CONFIG_ENV_OFFSET_REDUND */
  31. DECLARE_GLOBAL_DATA_PTR;
  32. static struct spi_flash *env_flash;
  33. static int setup_flash_device(void)
  34. {
  35. #ifdef CONFIG_DM_SPI_FLASH
  36. struct udevice *new;
  37. int ret;
  38. /* speed and mode will be read from DT */
  39. ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
  40. CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
  41. &new);
  42. if (ret) {
  43. env_set_default("spi_flash_probe_bus_cs() failed", 0);
  44. return ret;
  45. }
  46. env_flash = dev_get_uclass_priv(new);
  47. #else
  48. if (!env_flash) {
  49. env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
  50. CONFIG_ENV_SPI_CS,
  51. CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
  52. if (!env_flash) {
  53. env_set_default("spi_flash_probe() failed", 0);
  54. return -EIO;
  55. }
  56. }
  57. #endif
  58. return 0;
  59. }
  60. #if defined(CONFIG_ENV_OFFSET_REDUND)
  61. #ifdef CMD_SAVEENV
  62. static int env_sf_save(void)
  63. {
  64. env_t env_new;
  65. char *saved_buffer = NULL, flag = ENV_REDUND_OBSOLETE;
  66. u32 saved_size, saved_offset, sector;
  67. int ret;
  68. ret = setup_flash_device();
  69. if (ret)
  70. return ret;
  71. ret = env_export(&env_new);
  72. if (ret)
  73. return -EIO;
  74. env_new.flags = ENV_REDUND_ACTIVE;
  75. if (gd->env_valid == ENV_VALID) {
  76. env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  77. env_offset = CONFIG_ENV_OFFSET;
  78. } else {
  79. env_new_offset = CONFIG_ENV_OFFSET;
  80. env_offset = CONFIG_ENV_OFFSET_REDUND;
  81. }
  82. /* Is the sector larger than the env (i.e. embedded) */
  83. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  84. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  85. saved_offset = env_new_offset + CONFIG_ENV_SIZE;
  86. saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
  87. if (!saved_buffer) {
  88. ret = -ENOMEM;
  89. goto done;
  90. }
  91. ret = spi_flash_read(env_flash, saved_offset,
  92. saved_size, saved_buffer);
  93. if (ret)
  94. goto done;
  95. }
  96. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  97. puts("Erasing SPI flash...");
  98. ret = spi_flash_erase(env_flash, env_new_offset,
  99. sector * CONFIG_ENV_SECT_SIZE);
  100. if (ret)
  101. goto done;
  102. puts("Writing to SPI flash...");
  103. ret = spi_flash_write(env_flash, env_new_offset,
  104. CONFIG_ENV_SIZE, &env_new);
  105. if (ret)
  106. goto done;
  107. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  108. ret = spi_flash_write(env_flash, saved_offset,
  109. saved_size, saved_buffer);
  110. if (ret)
  111. goto done;
  112. }
  113. ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
  114. sizeof(env_new.flags), &flag);
  115. if (ret)
  116. goto done;
  117. puts("done\n");
  118. gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
  119. printf("Valid environment: %d\n", (int)gd->env_valid);
  120. done:
  121. if (saved_buffer)
  122. free(saved_buffer);
  123. return ret;
  124. }
  125. #endif /* CMD_SAVEENV */
  126. static int env_sf_load(void)
  127. {
  128. int ret;
  129. int read1_fail, read2_fail;
  130. env_t *tmp_env1, *tmp_env2;
  131. tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  132. CONFIG_ENV_SIZE);
  133. tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  134. CONFIG_ENV_SIZE);
  135. if (!tmp_env1 || !tmp_env2) {
  136. env_set_default("malloc() failed", 0);
  137. ret = -EIO;
  138. goto out;
  139. }
  140. ret = setup_flash_device();
  141. if (ret)
  142. goto out;
  143. read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
  144. CONFIG_ENV_SIZE, tmp_env1);
  145. read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
  146. CONFIG_ENV_SIZE, tmp_env2);
  147. ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
  148. read2_fail);
  149. spi_flash_free(env_flash);
  150. env_flash = NULL;
  151. out:
  152. free(tmp_env1);
  153. free(tmp_env2);
  154. return ret;
  155. }
  156. #else
  157. #ifdef CMD_SAVEENV
  158. static int env_sf_save(void)
  159. {
  160. u32 saved_size, saved_offset, sector;
  161. char *saved_buffer = NULL;
  162. int ret = 1;
  163. env_t env_new;
  164. ret = setup_flash_device();
  165. if (ret)
  166. return ret;
  167. /* Is the sector larger than the env (i.e. embedded) */
  168. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  169. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  170. saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
  171. saved_buffer = malloc(saved_size);
  172. if (!saved_buffer)
  173. goto done;
  174. ret = spi_flash_read(env_flash, saved_offset,
  175. saved_size, saved_buffer);
  176. if (ret)
  177. goto done;
  178. }
  179. ret = env_export(&env_new);
  180. if (ret)
  181. goto done;
  182. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  183. puts("Erasing SPI flash...");
  184. ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
  185. sector * CONFIG_ENV_SECT_SIZE);
  186. if (ret)
  187. goto done;
  188. puts("Writing to SPI flash...");
  189. ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
  190. CONFIG_ENV_SIZE, &env_new);
  191. if (ret)
  192. goto done;
  193. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  194. ret = spi_flash_write(env_flash, saved_offset,
  195. saved_size, saved_buffer);
  196. if (ret)
  197. goto done;
  198. }
  199. ret = 0;
  200. puts("done\n");
  201. done:
  202. if (saved_buffer)
  203. free(saved_buffer);
  204. return ret;
  205. }
  206. #endif /* CMD_SAVEENV */
  207. static int env_sf_load(void)
  208. {
  209. int ret;
  210. char *buf = NULL;
  211. buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
  212. if (!buf) {
  213. env_set_default("malloc() failed", 0);
  214. return -EIO;
  215. }
  216. ret = setup_flash_device();
  217. if (ret)
  218. goto out;
  219. ret = spi_flash_read(env_flash,
  220. CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
  221. if (ret) {
  222. env_set_default("spi_flash_read() failed", 0);
  223. goto err_read;
  224. }
  225. ret = env_import(buf, 1);
  226. if (!ret)
  227. gd->env_valid = ENV_VALID;
  228. err_read:
  229. spi_flash_free(env_flash);
  230. env_flash = NULL;
  231. out:
  232. free(buf);
  233. return ret;
  234. }
  235. #endif
  236. #ifdef CONFIG_ENV_ADDR
  237. __weak void *env_sf_get_env_addr(void)
  238. {
  239. return (void *)CONFIG_ENV_ADDR;
  240. }
  241. #endif
  242. #if defined(INITENV) && defined(CONFIG_ENV_ADDR)
  243. static int env_sf_init(void)
  244. {
  245. env_t *env_ptr = (env_t *)env_sf_get_env_addr();
  246. if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
  247. gd->env_addr = (ulong)&(env_ptr->data);
  248. gd->env_valid = 1;
  249. } else {
  250. gd->env_addr = (ulong)&default_environment[0];
  251. gd->env_valid = 1;
  252. }
  253. return 0;
  254. }
  255. #endif
  256. U_BOOT_ENV_LOCATION(sf) = {
  257. .location = ENVL_SPI_FLASH,
  258. ENV_NAME("SPI Flash")
  259. .load = env_sf_load,
  260. #ifdef CMD_SAVEENV
  261. .save = env_save_ptr(env_sf_save),
  262. #endif
  263. #if defined(INITENV) && defined(CONFIG_ENV_ADDR)
  264. .init = env_sf_init,
  265. #endif
  266. };