sf.c 6.4 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312
  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 INITENV
  24. #endif
  25. #ifdef CONFIG_ENV_OFFSET_REDUND
  26. static ulong env_offset = CONFIG_ENV_OFFSET;
  27. static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  28. #endif /* CONFIG_ENV_OFFSET_REDUND */
  29. DECLARE_GLOBAL_DATA_PTR;
  30. static struct spi_flash *env_flash;
  31. static int setup_flash_device(void)
  32. {
  33. #ifdef CONFIG_DM_SPI_FLASH
  34. struct udevice *new;
  35. int ret;
  36. /* speed and mode will be read from DT */
  37. ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
  38. CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
  39. &new);
  40. if (ret) {
  41. env_set_default("spi_flash_probe_bus_cs() failed", 0);
  42. return ret;
  43. }
  44. env_flash = dev_get_uclass_priv(new);
  45. #else
  46. if (!env_flash) {
  47. env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
  48. CONFIG_ENV_SPI_CS,
  49. CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
  50. if (!env_flash) {
  51. env_set_default("spi_flash_probe() failed", 0);
  52. return -EIO;
  53. }
  54. }
  55. #endif
  56. return 0;
  57. }
  58. #if defined(CONFIG_ENV_OFFSET_REDUND)
  59. static int env_sf_save(void)
  60. {
  61. env_t env_new;
  62. char *saved_buffer = NULL, flag = ENV_REDUND_OBSOLETE;
  63. u32 saved_size, saved_offset, sector;
  64. int ret;
  65. ret = setup_flash_device();
  66. if (ret)
  67. return ret;
  68. ret = env_export(&env_new);
  69. if (ret)
  70. return -EIO;
  71. env_new.flags = ENV_REDUND_ACTIVE;
  72. if (gd->env_valid == ENV_VALID) {
  73. env_new_offset = CONFIG_ENV_OFFSET_REDUND;
  74. env_offset = CONFIG_ENV_OFFSET;
  75. } else {
  76. env_new_offset = CONFIG_ENV_OFFSET;
  77. env_offset = CONFIG_ENV_OFFSET_REDUND;
  78. }
  79. /* Is the sector larger than the env (i.e. embedded) */
  80. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  81. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  82. saved_offset = env_new_offset + CONFIG_ENV_SIZE;
  83. saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
  84. if (!saved_buffer) {
  85. ret = -ENOMEM;
  86. goto done;
  87. }
  88. ret = spi_flash_read(env_flash, saved_offset,
  89. saved_size, saved_buffer);
  90. if (ret)
  91. goto done;
  92. }
  93. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  94. puts("Erasing SPI flash...");
  95. ret = spi_flash_erase(env_flash, env_new_offset,
  96. sector * CONFIG_ENV_SECT_SIZE);
  97. if (ret)
  98. goto done;
  99. puts("Writing to SPI flash...");
  100. ret = spi_flash_write(env_flash, env_new_offset,
  101. CONFIG_ENV_SIZE, &env_new);
  102. if (ret)
  103. goto done;
  104. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  105. ret = spi_flash_write(env_flash, saved_offset,
  106. saved_size, saved_buffer);
  107. if (ret)
  108. goto done;
  109. }
  110. ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
  111. sizeof(env_new.flags), &flag);
  112. if (ret)
  113. goto done;
  114. puts("done\n");
  115. gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
  116. printf("Valid environment: %d\n", (int)gd->env_valid);
  117. done:
  118. if (saved_buffer)
  119. free(saved_buffer);
  120. return ret;
  121. }
  122. static int env_sf_load(void)
  123. {
  124. int ret;
  125. int read1_fail, read2_fail;
  126. env_t *tmp_env1, *tmp_env2;
  127. tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  128. CONFIG_ENV_SIZE);
  129. tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
  130. CONFIG_ENV_SIZE);
  131. if (!tmp_env1 || !tmp_env2) {
  132. env_set_default("malloc() failed", 0);
  133. ret = -EIO;
  134. goto out;
  135. }
  136. ret = setup_flash_device();
  137. if (ret)
  138. goto out;
  139. read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
  140. CONFIG_ENV_SIZE, tmp_env1);
  141. read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
  142. CONFIG_ENV_SIZE, tmp_env2);
  143. ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
  144. read2_fail);
  145. spi_flash_free(env_flash);
  146. env_flash = NULL;
  147. out:
  148. free(tmp_env1);
  149. free(tmp_env2);
  150. return ret;
  151. }
  152. #else
  153. static int env_sf_save(void)
  154. {
  155. u32 saved_size, saved_offset, sector;
  156. char *saved_buffer = NULL;
  157. int ret = 1;
  158. env_t env_new;
  159. ret = setup_flash_device();
  160. if (ret)
  161. return ret;
  162. /* Is the sector larger than the env (i.e. embedded) */
  163. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  164. saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
  165. saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
  166. saved_buffer = malloc(saved_size);
  167. if (!saved_buffer)
  168. goto done;
  169. ret = spi_flash_read(env_flash, saved_offset,
  170. saved_size, saved_buffer);
  171. if (ret)
  172. goto done;
  173. }
  174. ret = env_export(&env_new);
  175. if (ret)
  176. goto done;
  177. sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
  178. puts("Erasing SPI flash...");
  179. ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
  180. sector * CONFIG_ENV_SECT_SIZE);
  181. if (ret)
  182. goto done;
  183. puts("Writing to SPI flash...");
  184. ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
  185. CONFIG_ENV_SIZE, &env_new);
  186. if (ret)
  187. goto done;
  188. if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
  189. ret = spi_flash_write(env_flash, saved_offset,
  190. saved_size, saved_buffer);
  191. if (ret)
  192. goto done;
  193. }
  194. ret = 0;
  195. puts("done\n");
  196. done:
  197. if (saved_buffer)
  198. free(saved_buffer);
  199. return ret;
  200. }
  201. static int env_sf_load(void)
  202. {
  203. int ret;
  204. char *buf = NULL;
  205. buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
  206. if (!buf) {
  207. env_set_default("malloc() failed", 0);
  208. return -EIO;
  209. }
  210. ret = setup_flash_device();
  211. if (ret)
  212. goto out;
  213. ret = spi_flash_read(env_flash,
  214. CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
  215. if (ret) {
  216. env_set_default("spi_flash_read() failed", 0);
  217. goto err_read;
  218. }
  219. ret = env_import(buf, 1);
  220. if (!ret)
  221. gd->env_valid = ENV_VALID;
  222. err_read:
  223. spi_flash_free(env_flash);
  224. env_flash = NULL;
  225. out:
  226. free(buf);
  227. return ret;
  228. }
  229. #endif
  230. #if CONFIG_ENV_ADDR != 0x0
  231. __weak void *env_sf_get_env_addr(void)
  232. {
  233. return (void *)CONFIG_ENV_ADDR;
  234. }
  235. #endif
  236. #if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
  237. static int env_sf_init(void)
  238. {
  239. env_t *env_ptr = (env_t *)env_sf_get_env_addr();
  240. if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
  241. gd->env_addr = (ulong)&(env_ptr->data);
  242. gd->env_valid = 1;
  243. } else {
  244. gd->env_addr = (ulong)&default_environment[0];
  245. gd->env_valid = 1;
  246. }
  247. return 0;
  248. }
  249. #endif
  250. U_BOOT_ENV_LOCATION(sf) = {
  251. .location = ENVL_SPI_FLASH,
  252. ENV_NAME("SPI Flash")
  253. .load = env_sf_load,
  254. .save = ENV_SAVE_PTR(env_sf_save),
  255. #if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
  256. .init = env_sf_init,
  257. #endif
  258. };