sf.c 6.6 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. #include <u-boot/crc.h>
  22. #ifndef CONFIG_SPL_BUILD
  23. #define CMD_SAVEENV
  24. #define INITENV
  25. #endif
  26. #ifdef CONFIG_ENV_OFFSET_REDUND
  27. #ifdef CMD_SAVEENV
  28. static ulong env_offset = CONFIG_ENV_OFFSET;
  29. static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  30. #endif
  31. #endif /* CONFIG_ENV_OFFSET_REDUND */
  32. DECLARE_GLOBAL_DATA_PTR;
  33. static struct spi_flash *env_flash;
  34. static int setup_flash_device(void)
  35. {
  36. #ifdef CONFIG_DM_SPI_FLASH
  37. struct udevice *new;
  38. int ret;
  39. /* speed and mode will be read from DT */
  40. ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
  41. CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
  42. &new);
  43. if (ret) {
  44. env_set_default("spi_flash_probe_bus_cs() failed", 0);
  45. return ret;
  46. }
  47. env_flash = dev_get_uclass_priv(new);
  48. #else
  49. if (!env_flash) {
  50. env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
  51. CONFIG_ENV_SPI_CS,
  52. CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
  53. if (!env_flash) {
  54. env_set_default("spi_flash_probe() failed", 0);
  55. return -EIO;
  56. }
  57. }
  58. #endif
  59. return 0;
  60. }
  61. #if defined(CONFIG_ENV_OFFSET_REDUND)
  62. #ifdef CMD_SAVEENV
  63. static int env_sf_save(void)
  64. {
  65. env_t env_new;
  66. char *saved_buffer = NULL, flag = ENV_REDUND_OBSOLETE;
  67. u32 saved_size, saved_offset, sector;
  68. int ret;
  69. ret = setup_flash_device();
  70. if (ret)
  71. return ret;
  72. ret = env_export(&env_new);
  73. if (ret)
  74. return -EIO;
  75. env_new.flags = ENV_REDUND_ACTIVE;
  76. if (gd->env_valid == ENV_VALID) {
  77. env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  78. env_offset = CONFIG_ENV_OFFSET;
  79. } else {
  80. env_new_offset = CONFIG_ENV_OFFSET;
  81. env_offset = CONFIG_ENV_OFFSET_REDUND;
  82. }
  83. /* Is the sector larger than the env (i.e. embedded) */
  84. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  85. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  86. saved_offset = env_new_offset + CONFIG_ENV_SIZE;
  87. saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
  88. if (!saved_buffer) {
  89. ret = -ENOMEM;
  90. goto done;
  91. }
  92. ret = spi_flash_read(env_flash, saved_offset,
  93. saved_size, saved_buffer);
  94. if (ret)
  95. goto done;
  96. }
  97. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  98. puts("Erasing SPI flash...");
  99. ret = spi_flash_erase(env_flash, env_new_offset,
  100. sector * CONFIG_ENV_SECT_SIZE);
  101. if (ret)
  102. goto done;
  103. puts("Writing to SPI flash...");
  104. ret = spi_flash_write(env_flash, env_new_offset,
  105. CONFIG_ENV_SIZE, &env_new);
  106. if (ret)
  107. goto done;
  108. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  109. ret = spi_flash_write(env_flash, saved_offset,
  110. saved_size, saved_buffer);
  111. if (ret)
  112. goto done;
  113. }
  114. ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
  115. sizeof(env_new.flags), &flag);
  116. if (ret)
  117. goto done;
  118. puts("done\n");
  119. gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
  120. printf("Valid environment: %d\n", (int)gd->env_valid);
  121. done:
  122. if (saved_buffer)
  123. free(saved_buffer);
  124. return ret;
  125. }
  126. #endif /* CMD_SAVEENV */
  127. static int env_sf_load(void)
  128. {
  129. int ret;
  130. int read1_fail, read2_fail;
  131. env_t *tmp_env1, *tmp_env2;
  132. tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  133. CONFIG_ENV_SIZE);
  134. tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  135. CONFIG_ENV_SIZE);
  136. if (!tmp_env1 || !tmp_env2) {
  137. env_set_default("malloc() failed", 0);
  138. ret = -EIO;
  139. goto out;
  140. }
  141. ret = setup_flash_device();
  142. if (ret)
  143. goto out;
  144. read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
  145. CONFIG_ENV_SIZE, tmp_env1);
  146. read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
  147. CONFIG_ENV_SIZE, tmp_env2);
  148. ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
  149. read2_fail);
  150. spi_flash_free(env_flash);
  151. env_flash = NULL;
  152. out:
  153. free(tmp_env1);
  154. free(tmp_env2);
  155. return ret;
  156. }
  157. #else
  158. #ifdef CMD_SAVEENV
  159. static int env_sf_save(void)
  160. {
  161. u32 saved_size, saved_offset, sector;
  162. char *saved_buffer = NULL;
  163. int ret = 1;
  164. env_t env_new;
  165. ret = setup_flash_device();
  166. if (ret)
  167. return ret;
  168. /* Is the sector larger than the env (i.e. embedded) */
  169. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  170. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  171. saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
  172. saved_buffer = malloc(saved_size);
  173. if (!saved_buffer)
  174. goto done;
  175. ret = spi_flash_read(env_flash, saved_offset,
  176. saved_size, saved_buffer);
  177. if (ret)
  178. goto done;
  179. }
  180. ret = env_export(&env_new);
  181. if (ret)
  182. goto done;
  183. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  184. puts("Erasing SPI flash...");
  185. ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
  186. sector * CONFIG_ENV_SECT_SIZE);
  187. if (ret)
  188. goto done;
  189. puts("Writing to SPI flash...");
  190. ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
  191. CONFIG_ENV_SIZE, &env_new);
  192. if (ret)
  193. goto done;
  194. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  195. ret = spi_flash_write(env_flash, saved_offset,
  196. saved_size, saved_buffer);
  197. if (ret)
  198. goto done;
  199. }
  200. ret = 0;
  201. puts("done\n");
  202. done:
  203. if (saved_buffer)
  204. free(saved_buffer);
  205. return ret;
  206. }
  207. #endif /* CMD_SAVEENV */
  208. static int env_sf_load(void)
  209. {
  210. int ret;
  211. char *buf = NULL;
  212. buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
  213. if (!buf) {
  214. env_set_default("malloc() failed", 0);
  215. return -EIO;
  216. }
  217. ret = setup_flash_device();
  218. if (ret)
  219. goto out;
  220. ret = spi_flash_read(env_flash,
  221. CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
  222. if (ret) {
  223. env_set_default("spi_flash_read() failed", 0);
  224. goto err_read;
  225. }
  226. ret = env_import(buf, 1);
  227. if (!ret)
  228. gd->env_valid = ENV_VALID;
  229. err_read:
  230. spi_flash_free(env_flash);
  231. env_flash = NULL;
  232. out:
  233. free(buf);
  234. return ret;
  235. }
  236. #endif
  237. #if CONFIG_ENV_ADDR != 0x0
  238. __weak void *env_sf_get_env_addr(void)
  239. {
  240. return (void *)CONFIG_ENV_ADDR;
  241. }
  242. #endif
  243. #if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
  244. static int env_sf_init(void)
  245. {
  246. env_t *env_ptr = (env_t *)env_sf_get_env_addr();
  247. if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
  248. gd->env_addr = (ulong)&(env_ptr->data);
  249. gd->env_valid = 1;
  250. } else {
  251. gd->env_addr = (ulong)&default_environment[0];
  252. gd->env_valid = 1;
  253. }
  254. return 0;
  255. }
  256. #endif
  257. U_BOOT_ENV_LOCATION(sf) = {
  258. .location = ENVL_SPI_FLASH,
  259. ENV_NAME("SPI Flash")
  260. .load = env_sf_load,
  261. #ifdef CMD_SAVEENV
  262. .save = env_save_ptr(env_sf_save),
  263. #endif
  264. #if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
  265. .init = env_sf_init,
  266. #endif
  267. };