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