mmc.c 8.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
  4. */
  5. /* #define DEBUG */
  6. #include <common.h>
  7. #include <command.h>
  8. #include <env.h>
  9. #include <env_internal.h>
  10. #include <fdtdec.h>
  11. #include <linux/stddef.h>
  12. #include <malloc.h>
  13. #include <memalign.h>
  14. #include <mmc.h>
  15. #include <part.h>
  16. #include <search.h>
  17. #include <errno.h>
  18. #define __STR(X) #X
  19. #define STR(X) __STR(X)
  20. #if defined(CONFIG_ENV_SIZE_REDUND) && \
  21. (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
  22. #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
  23. #endif
  24. DECLARE_GLOBAL_DATA_PTR;
  25. #if !defined(CONFIG_ENV_OFFSET)
  26. #define CONFIG_ENV_OFFSET 0
  27. #endif
  28. #if CONFIG_IS_ENABLED(OF_CONTROL)
  29. static inline int mmc_offset_try_partition(const char *str, s64 *val)
  30. {
  31. disk_partition_t info;
  32. struct blk_desc *desc;
  33. int len, i, ret;
  34. ret = blk_get_device_by_str("mmc", STR(CONFIG_SYS_MMC_ENV_DEV), &desc);
  35. if (ret < 0)
  36. return (ret);
  37. for (i = 1;;i++) {
  38. ret = part_get_info(desc, i, &info);
  39. if (ret < 0)
  40. return ret;
  41. if (!strncmp((const char *)info.name, str, sizeof(str)))
  42. break;
  43. }
  44. /* round up to info.blksz */
  45. len = (CONFIG_ENV_SIZE + info.blksz - 1) & ~(info.blksz - 1);
  46. /* use the top of the partion for the environment */
  47. *val = (info.start + info.size - 1) - len / info.blksz;
  48. return 0;
  49. }
  50. static inline s64 mmc_offset(int copy)
  51. {
  52. const struct {
  53. const char *offset_redund;
  54. const char *partition;
  55. const char *offset;
  56. } dt_prop = {
  57. .offset_redund = "u-boot,mmc-env-offset-redundant",
  58. .partition = "u-boot,mmc-env-partition",
  59. .offset = "u-boot,mmc-env-offset",
  60. };
  61. s64 val = 0, defvalue;
  62. const char *propname;
  63. const char *str;
  64. int err;
  65. /* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
  66. str = fdtdec_get_config_string(gd->fdt_blob, dt_prop.partition);
  67. if (str) {
  68. /* try to place the environment at end of the partition */
  69. err = mmc_offset_try_partition(str, &val);
  70. if (!err)
  71. return val;
  72. }
  73. defvalue = CONFIG_ENV_OFFSET;
  74. propname = dt_prop.offset;
  75. #if defined(CONFIG_ENV_OFFSET_REDUND)
  76. if (copy) {
  77. defvalue = CONFIG_ENV_OFFSET_REDUND;
  78. propname = dt_prop.offset_redund;
  79. }
  80. #endif
  81. return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
  82. }
  83. #else
  84. static inline s64 mmc_offset(int copy)
  85. {
  86. s64 offset = CONFIG_ENV_OFFSET;
  87. #if defined(CONFIG_ENV_OFFSET_REDUND)
  88. if (copy)
  89. offset = CONFIG_ENV_OFFSET_REDUND;
  90. #endif
  91. return offset;
  92. }
  93. #endif
  94. __weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
  95. {
  96. s64 offset = mmc_offset(copy);
  97. if (offset < 0)
  98. offset += mmc->capacity;
  99. *env_addr = offset;
  100. return 0;
  101. }
  102. __weak int mmc_get_env_dev(void)
  103. {
  104. return CONFIG_SYS_MMC_ENV_DEV;
  105. }
  106. #ifdef CONFIG_SYS_MMC_ENV_PART
  107. __weak uint mmc_get_env_part(struct mmc *mmc)
  108. {
  109. return CONFIG_SYS_MMC_ENV_PART;
  110. }
  111. static unsigned char env_mmc_orig_hwpart;
  112. static int mmc_set_env_part(struct mmc *mmc)
  113. {
  114. uint part = mmc_get_env_part(mmc);
  115. int dev = mmc_get_env_dev();
  116. int ret = 0;
  117. env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
  118. ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
  119. if (ret)
  120. puts("MMC partition switch failed\n");
  121. return ret;
  122. }
  123. #else
  124. static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
  125. #endif
  126. static const char *init_mmc_for_env(struct mmc *mmc)
  127. {
  128. if (!mmc)
  129. return "No MMC card found";
  130. #if CONFIG_IS_ENABLED(BLK)
  131. struct udevice *dev;
  132. if (blk_get_from_parent(mmc->dev, &dev))
  133. return "No block device";
  134. #else
  135. if (mmc_init(mmc))
  136. return "MMC init failed";
  137. #endif
  138. if (mmc_set_env_part(mmc))
  139. return "MMC partition switch failed";
  140. return NULL;
  141. }
  142. static void fini_mmc_for_env(struct mmc *mmc)
  143. {
  144. #ifdef CONFIG_SYS_MMC_ENV_PART
  145. int dev = mmc_get_env_dev();
  146. blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
  147. #endif
  148. }
  149. #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
  150. static inline int write_env(struct mmc *mmc, unsigned long size,
  151. unsigned long offset, const void *buffer)
  152. {
  153. uint blk_start, blk_cnt, n;
  154. struct blk_desc *desc = mmc_get_blk_desc(mmc);
  155. blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
  156. blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
  157. n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
  158. return (n == blk_cnt) ? 0 : -1;
  159. }
  160. static int env_mmc_save(void)
  161. {
  162. ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  163. int dev = mmc_get_env_dev();
  164. struct mmc *mmc = find_mmc_device(dev);
  165. u32 offset;
  166. int ret, copy = 0;
  167. const char *errmsg;
  168. errmsg = init_mmc_for_env(mmc);
  169. if (errmsg) {
  170. printf("%s\n", errmsg);
  171. return 1;
  172. }
  173. ret = env_export(env_new);
  174. if (ret)
  175. goto fini;
  176. #ifdef CONFIG_ENV_OFFSET_REDUND
  177. if (gd->env_valid == ENV_VALID)
  178. copy = 1;
  179. #endif
  180. if (mmc_get_env_addr(mmc, copy, &offset)) {
  181. ret = 1;
  182. goto fini;
  183. }
  184. printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
  185. if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
  186. puts("failed\n");
  187. ret = 1;
  188. goto fini;
  189. }
  190. ret = 0;
  191. #ifdef CONFIG_ENV_OFFSET_REDUND
  192. gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
  193. #endif
  194. fini:
  195. fini_mmc_for_env(mmc);
  196. return ret;
  197. }
  198. #if defined(CONFIG_CMD_ERASEENV)
  199. static inline int erase_env(struct mmc *mmc, unsigned long size,
  200. unsigned long offset)
  201. {
  202. uint blk_start, blk_cnt, n;
  203. struct blk_desc *desc = mmc_get_blk_desc(mmc);
  204. blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
  205. blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
  206. n = blk_derase(desc, blk_start, blk_cnt);
  207. printf("%d blocks erased: %s\n", n, (n == blk_cnt) ? "OK" : "ERROR");
  208. return (n == blk_cnt) ? 0 : 1;
  209. }
  210. static int env_mmc_erase(void)
  211. {
  212. int dev = mmc_get_env_dev();
  213. struct mmc *mmc = find_mmc_device(dev);
  214. int ret, copy = 0;
  215. u32 offset;
  216. const char *errmsg;
  217. errmsg = init_mmc_for_env(mmc);
  218. if (errmsg) {
  219. printf("%s\n", errmsg);
  220. return 1;
  221. }
  222. if (mmc_get_env_addr(mmc, copy, &offset))
  223. return CMD_RET_FAILURE;
  224. ret = erase_env(mmc, CONFIG_ENV_SIZE, offset);
  225. #ifdef CONFIG_ENV_OFFSET_REDUND
  226. copy = 1;
  227. if (mmc_get_env_addr(mmc, copy, &offset))
  228. return CMD_RET_FAILURE;
  229. ret |= erase_env(mmc, CONFIG_ENV_SIZE, offset);
  230. #endif
  231. return ret;
  232. }
  233. #endif /* CONFIG_CMD_ERASEENV */
  234. #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
  235. static inline int read_env(struct mmc *mmc, unsigned long size,
  236. unsigned long offset, const void *buffer)
  237. {
  238. uint blk_start, blk_cnt, n;
  239. struct blk_desc *desc = mmc_get_blk_desc(mmc);
  240. blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
  241. blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
  242. n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
  243. return (n == blk_cnt) ? 0 : -1;
  244. }
  245. #ifdef CONFIG_ENV_OFFSET_REDUND
  246. static int env_mmc_load(void)
  247. {
  248. #if !defined(ENV_IS_EMBEDDED)
  249. struct mmc *mmc;
  250. u32 offset1, offset2;
  251. int read1_fail = 0, read2_fail = 0;
  252. int ret;
  253. int dev = mmc_get_env_dev();
  254. const char *errmsg = NULL;
  255. ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
  256. ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
  257. mmc_initialize(NULL);
  258. mmc = find_mmc_device(dev);
  259. errmsg = init_mmc_for_env(mmc);
  260. if (errmsg) {
  261. ret = -EIO;
  262. goto err;
  263. }
  264. if (mmc_get_env_addr(mmc, 0, &offset1) ||
  265. mmc_get_env_addr(mmc, 1, &offset2)) {
  266. ret = -EIO;
  267. goto fini;
  268. }
  269. read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
  270. read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
  271. ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
  272. read2_fail);
  273. fini:
  274. fini_mmc_for_env(mmc);
  275. err:
  276. if (ret)
  277. env_set_default(errmsg, 0);
  278. #endif
  279. return ret;
  280. }
  281. #else /* ! CONFIG_ENV_OFFSET_REDUND */
  282. static int env_mmc_load(void)
  283. {
  284. #if !defined(ENV_IS_EMBEDDED)
  285. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  286. struct mmc *mmc;
  287. u32 offset;
  288. int ret;
  289. int dev = mmc_get_env_dev();
  290. const char *errmsg;
  291. mmc = find_mmc_device(dev);
  292. errmsg = init_mmc_for_env(mmc);
  293. if (errmsg) {
  294. ret = -EIO;
  295. goto err;
  296. }
  297. if (mmc_get_env_addr(mmc, 0, &offset)) {
  298. ret = -EIO;
  299. goto fini;
  300. }
  301. if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
  302. errmsg = "!read failed";
  303. ret = -EIO;
  304. goto fini;
  305. }
  306. ret = env_import(buf, 1);
  307. fini:
  308. fini_mmc_for_env(mmc);
  309. err:
  310. if (ret)
  311. env_set_default(errmsg, 0);
  312. #endif
  313. return ret;
  314. }
  315. #endif /* CONFIG_ENV_OFFSET_REDUND */
  316. U_BOOT_ENV_LOCATION(mmc) = {
  317. .location = ENVL_MMC,
  318. ENV_NAME("MMC")
  319. .load = env_mmc_load,
  320. #ifndef CONFIG_SPL_BUILD
  321. .save = env_save_ptr(env_mmc_save),
  322. #if defined(CONFIG_CMD_ERASEENV)
  323. .erase = env_mmc_erase,
  324. #endif
  325. #endif
  326. };