sf.c 6.7 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 <environment.h>
  14. #include <malloc.h>
  15. #include <spi.h>
  16. #include <spi_flash.h>
  17. #include <search.h>
  18. #include <errno.h>
  19. #include <dm/device-internal.h>
  20. #ifndef CONFIG_ENV_SPI_BUS
  21. # define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
  22. #endif
  23. #ifndef CONFIG_ENV_SPI_CS
  24. # define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
  25. #endif
  26. #ifndef CONFIG_ENV_SPI_MAX_HZ
  27. # define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
  28. #endif
  29. #ifndef CONFIG_ENV_SPI_MODE
  30. # define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
  31. #endif
  32. #ifndef CONFIG_SPL_BUILD
  33. #define CMD_SAVEENV
  34. #define INITENV
  35. #endif
  36. #ifdef CONFIG_ENV_OFFSET_REDUND
  37. #ifdef CMD_SAVEENV
  38. static ulong env_offset = CONFIG_ENV_OFFSET;
  39. static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  40. #endif
  41. #define ACTIVE_FLAG 1
  42. #define OBSOLETE_FLAG 0
  43. #endif /* CONFIG_ENV_OFFSET_REDUND */
  44. DECLARE_GLOBAL_DATA_PTR;
  45. static struct spi_flash *env_flash;
  46. static int setup_flash_device(void)
  47. {
  48. #ifdef CONFIG_DM_SPI_FLASH
  49. struct udevice *new;
  50. int ret;
  51. /* speed and mode will be read from DT */
  52. ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
  53. 0, 0, &new);
  54. if (ret) {
  55. set_default_env("!spi_flash_probe_bus_cs() failed");
  56. return ret;
  57. }
  58. env_flash = dev_get_uclass_priv(new);
  59. #else
  60. if (!env_flash) {
  61. env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
  62. CONFIG_ENV_SPI_CS,
  63. CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
  64. if (!env_flash) {
  65. set_default_env("!spi_flash_probe() failed");
  66. return -EIO;
  67. }
  68. }
  69. #endif
  70. return 0;
  71. }
  72. #if defined(CONFIG_ENV_OFFSET_REDUND)
  73. #ifdef CMD_SAVEENV
  74. static int env_sf_save(void)
  75. {
  76. env_t env_new;
  77. char *saved_buffer = NULL, flag = OBSOLETE_FLAG;
  78. u32 saved_size, saved_offset, sector;
  79. int ret;
  80. ret = setup_flash_device();
  81. if (ret)
  82. return ret;
  83. ret = env_export(&env_new);
  84. if (ret)
  85. return -EIO;
  86. env_new.flags = ACTIVE_FLAG;
  87. if (gd->env_valid == ENV_VALID) {
  88. env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  89. env_offset = CONFIG_ENV_OFFSET;
  90. } else {
  91. env_new_offset = CONFIG_ENV_OFFSET;
  92. env_offset = CONFIG_ENV_OFFSET_REDUND;
  93. }
  94. /* Is the sector larger than the env (i.e. embedded) */
  95. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  96. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  97. saved_offset = env_new_offset + CONFIG_ENV_SIZE;
  98. saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
  99. if (!saved_buffer) {
  100. ret = -ENOMEM;
  101. goto done;
  102. }
  103. ret = spi_flash_read(env_flash, saved_offset,
  104. saved_size, saved_buffer);
  105. if (ret)
  106. goto done;
  107. }
  108. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  109. puts("Erasing SPI flash...");
  110. ret = spi_flash_erase(env_flash, env_new_offset,
  111. sector * CONFIG_ENV_SECT_SIZE);
  112. if (ret)
  113. goto done;
  114. puts("Writing to SPI flash...");
  115. ret = spi_flash_write(env_flash, env_new_offset,
  116. CONFIG_ENV_SIZE, &env_new);
  117. if (ret)
  118. goto done;
  119. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  120. ret = spi_flash_write(env_flash, saved_offset,
  121. saved_size, saved_buffer);
  122. if (ret)
  123. goto done;
  124. }
  125. ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
  126. sizeof(env_new.flags), &flag);
  127. if (ret)
  128. goto done;
  129. puts("done\n");
  130. gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
  131. printf("Valid environment: %d\n", (int)gd->env_valid);
  132. done:
  133. if (saved_buffer)
  134. free(saved_buffer);
  135. return ret;
  136. }
  137. #endif /* CMD_SAVEENV */
  138. static int env_sf_load(void)
  139. {
  140. int ret;
  141. int read1_fail, read2_fail;
  142. env_t *tmp_env1, *tmp_env2;
  143. tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  144. CONFIG_ENV_SIZE);
  145. tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  146. CONFIG_ENV_SIZE);
  147. if (!tmp_env1 || !tmp_env2) {
  148. set_default_env("!malloc() failed");
  149. ret = -EIO;
  150. goto out;
  151. }
  152. ret = setup_flash_device();
  153. if (ret)
  154. goto out;
  155. read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
  156. CONFIG_ENV_SIZE, tmp_env1);
  157. read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
  158. CONFIG_ENV_SIZE, tmp_env2);
  159. ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
  160. read2_fail);
  161. spi_flash_free(env_flash);
  162. env_flash = NULL;
  163. out:
  164. free(tmp_env1);
  165. free(tmp_env2);
  166. return ret;
  167. }
  168. #else
  169. #ifdef CMD_SAVEENV
  170. static int env_sf_save(void)
  171. {
  172. u32 saved_size, saved_offset, sector;
  173. char *saved_buffer = NULL;
  174. int ret = 1;
  175. env_t env_new;
  176. ret = setup_flash_device();
  177. if (ret)
  178. return ret;
  179. /* Is the sector larger than the env (i.e. embedded) */
  180. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  181. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  182. saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
  183. saved_buffer = malloc(saved_size);
  184. if (!saved_buffer)
  185. goto done;
  186. ret = spi_flash_read(env_flash, saved_offset,
  187. saved_size, saved_buffer);
  188. if (ret)
  189. goto done;
  190. }
  191. ret = env_export(&env_new);
  192. if (ret)
  193. goto done;
  194. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  195. puts("Erasing SPI flash...");
  196. ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
  197. sector * CONFIG_ENV_SECT_SIZE);
  198. if (ret)
  199. goto done;
  200. puts("Writing to SPI flash...");
  201. ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
  202. CONFIG_ENV_SIZE, &env_new);
  203. if (ret)
  204. goto done;
  205. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  206. ret = spi_flash_write(env_flash, saved_offset,
  207. saved_size, saved_buffer);
  208. if (ret)
  209. goto done;
  210. }
  211. ret = 0;
  212. puts("done\n");
  213. done:
  214. if (saved_buffer)
  215. free(saved_buffer);
  216. return ret;
  217. }
  218. #endif /* CMD_SAVEENV */
  219. static int env_sf_load(void)
  220. {
  221. int ret;
  222. char *buf = NULL;
  223. buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
  224. if (!buf) {
  225. set_default_env("!malloc() failed");
  226. return -EIO;
  227. }
  228. ret = setup_flash_device();
  229. if (ret)
  230. goto out;
  231. ret = spi_flash_read(env_flash,
  232. CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
  233. if (ret) {
  234. set_default_env("!spi_flash_read() failed");
  235. goto err_read;
  236. }
  237. ret = env_import(buf, 1);
  238. if (!ret)
  239. gd->env_valid = ENV_VALID;
  240. err_read:
  241. spi_flash_free(env_flash);
  242. env_flash = NULL;
  243. out:
  244. free(buf);
  245. return ret;
  246. }
  247. #endif
  248. #if defined(INITENV) && defined(CONFIG_ENV_ADDR)
  249. static int env_sf_init(void)
  250. {
  251. env_t *env_ptr = (env_t *)(CONFIG_ENV_ADDR);
  252. if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
  253. gd->env_addr = (ulong)&(env_ptr->data);
  254. gd->env_valid = 1;
  255. } else {
  256. gd->env_addr = (ulong)&default_environment[0];
  257. gd->env_valid = 1;
  258. }
  259. return 0;
  260. }
  261. #endif
  262. U_BOOT_ENV_LOCATION(sf) = {
  263. .location = ENVL_SPI_FLASH,
  264. ENV_NAME("SPI Flash")
  265. .load = env_sf_load,
  266. #ifdef CMD_SAVEENV
  267. .save = env_save_ptr(env_sf_save),
  268. #endif
  269. #if defined(INITENV) && defined(CONFIG_ENV_ADDR)
  270. .init = env_sf_init,
  271. #endif
  272. };