mmc.c 11 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 <asm/global_data.h>
  8. #include <command.h>
  9. #include <env.h>
  10. #include <env_internal.h>
  11. #include <fdtdec.h>
  12. #include <linux/stddef.h>
  13. #include <malloc.h>
  14. #include <memalign.h>
  15. #include <mmc.h>
  16. #include <part.h>
  17. #include <search.h>
  18. #include <errno.h>
  19. #include <dm/ofnode.h>
  20. #define ENV_MMC_INVALID_OFFSET ((s64)-1)
  21. #if defined(CONFIG_ENV_MMC_USE_DT)
  22. /* ENV offset is invalid when not defined in Device Tree */
  23. #define ENV_MMC_OFFSET ENV_MMC_INVALID_OFFSET
  24. #define ENV_MMC_OFFSET_REDUND ENV_MMC_INVALID_OFFSET
  25. #else
  26. /* Default ENV offset when not defined in Device Tree */
  27. #define ENV_MMC_OFFSET CONFIG_ENV_OFFSET
  28. #if defined(CONFIG_ENV_OFFSET_REDUND)
  29. #define ENV_MMC_OFFSET_REDUND CONFIG_ENV_OFFSET_REDUND
  30. #else
  31. #define ENV_MMC_OFFSET_REDUND ENV_MMC_INVALID_OFFSET
  32. #endif
  33. #endif
  34. DECLARE_GLOBAL_DATA_PTR;
  35. /*
  36. * In case the environment is redundant, stored in eMMC hardware boot
  37. * partition and the environment and redundant environment offsets are
  38. * identical, store the environment and redundant environment in both
  39. * eMMC boot partitions, one copy in each.
  40. * */
  41. #if (defined(CONFIG_SYS_REDUNDAND_ENVIRONMENT) && \
  42. (CONFIG_SYS_MMC_ENV_PART == 1) && \
  43. (CONFIG_ENV_OFFSET == CONFIG_ENV_OFFSET_REDUND))
  44. #define ENV_MMC_HWPART_REDUND 1
  45. #endif
  46. #if CONFIG_IS_ENABLED(OF_CONTROL)
  47. static inline int mmc_offset_try_partition(const char *str, int copy, s64 *val)
  48. {
  49. struct disk_partition info;
  50. struct blk_desc *desc;
  51. int len, i, ret;
  52. char dev_str[4];
  53. snprintf(dev_str, sizeof(dev_str), "%d", mmc_get_env_dev());
  54. ret = blk_get_device_by_str("mmc", dev_str, &desc);
  55. if (ret < 0)
  56. return (ret);
  57. for (i = 1;;i++) {
  58. ret = part_get_info(desc, i, &info);
  59. if (ret < 0)
  60. return ret;
  61. if (str && !strncmp((const char *)info.name, str, sizeof(info.name)))
  62. break;
  63. #ifdef CONFIG_PARTITION_TYPE_GUID
  64. if (!str) {
  65. const efi_guid_t env_guid = PARTITION_U_BOOT_ENVIRONMENT;
  66. efi_guid_t type_guid;
  67. uuid_str_to_bin(info.type_guid, type_guid.b, UUID_STR_FORMAT_GUID);
  68. if (!memcmp(&env_guid, &type_guid, sizeof(efi_guid_t)))
  69. break;
  70. }
  71. #endif
  72. }
  73. /* round up to info.blksz */
  74. len = DIV_ROUND_UP(CONFIG_ENV_SIZE, info.blksz);
  75. /* use the top of the partion for the environment */
  76. *val = (info.start + info.size - (1 + copy) * len) * info.blksz;
  77. return 0;
  78. }
  79. static inline s64 mmc_offset(struct mmc *mmc, int copy)
  80. {
  81. const struct {
  82. const char *offset_redund;
  83. const char *partition;
  84. const char *offset;
  85. } dt_prop = {
  86. .offset_redund = "u-boot,mmc-env-offset-redundant",
  87. .partition = "u-boot,mmc-env-partition",
  88. .offset = "u-boot,mmc-env-offset",
  89. };
  90. s64 val = 0, defvalue;
  91. const char *propname;
  92. const char *str;
  93. int hwpart = 0;
  94. int err;
  95. if (IS_ENABLED(CONFIG_SYS_MMC_ENV_PART))
  96. hwpart = mmc_get_env_part(mmc);
  97. #if defined(CONFIG_ENV_MMC_PARTITION)
  98. str = CONFIG_ENV_MMC_PARTITION;
  99. #else
  100. /* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
  101. str = ofnode_conf_read_str(dt_prop.partition);
  102. #endif
  103. if (str) {
  104. /* try to place the environment at end of the partition */
  105. err = mmc_offset_try_partition(str, copy, &val);
  106. if (!err)
  107. return val;
  108. debug("env partition '%s' not found (%d)", str, err);
  109. }
  110. /* try the GPT partition with "U-Boot ENV" TYPE GUID */
  111. if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID) && hwpart == 0) {
  112. err = mmc_offset_try_partition(NULL, copy, &val);
  113. if (!err)
  114. return val;
  115. }
  116. defvalue = ENV_MMC_OFFSET;
  117. propname = dt_prop.offset;
  118. if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT) && copy) {
  119. defvalue = ENV_MMC_OFFSET_REDUND;
  120. propname = dt_prop.offset_redund;
  121. }
  122. return ofnode_conf_read_int(propname, defvalue);
  123. }
  124. #else
  125. static inline s64 mmc_offset(struct mmc *mmc, int copy)
  126. {
  127. s64 offset = ENV_MMC_OFFSET;
  128. if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT) && copy)
  129. offset = ENV_MMC_OFFSET_REDUND;
  130. return offset;
  131. }
  132. #endif
  133. __weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
  134. {
  135. s64 offset = mmc_offset(mmc, copy);
  136. if (offset == ENV_MMC_INVALID_OFFSET) {
  137. printf("Invalid ENV offset in MMC, copy=%d\n", copy);
  138. return -ENOENT;
  139. }
  140. if (offset < 0)
  141. offset += mmc->capacity;
  142. *env_addr = offset;
  143. return 0;
  144. }
  145. #ifdef CONFIG_SYS_MMC_ENV_PART
  146. __weak uint mmc_get_env_part(struct mmc *mmc)
  147. {
  148. return CONFIG_SYS_MMC_ENV_PART;
  149. }
  150. static unsigned char env_mmc_orig_hwpart;
  151. static int mmc_set_env_part(struct mmc *mmc, uint part)
  152. {
  153. int dev = mmc_get_env_dev();
  154. int ret = 0;
  155. ret = blk_select_hwpart_devnum(UCLASS_MMC, dev, part);
  156. if (ret)
  157. puts("MMC partition switch failed\n");
  158. return ret;
  159. }
  160. static bool mmc_set_env_part_init(struct mmc *mmc)
  161. {
  162. env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
  163. if (mmc_set_env_part(mmc, mmc_get_env_part(mmc)))
  164. return false;
  165. return true;
  166. }
  167. static int mmc_set_env_part_restore(struct mmc *mmc)
  168. {
  169. return mmc_set_env_part(mmc, env_mmc_orig_hwpart);
  170. }
  171. #else
  172. static inline int mmc_set_env_part(struct mmc *mmc, uint part) {return 0; };
  173. static bool mmc_set_env_part_init(struct mmc *mmc) {return true; }
  174. static inline int mmc_set_env_part_restore(struct mmc *mmc) {return 0; };
  175. #endif
  176. static const char *init_mmc_for_env(struct mmc *mmc)
  177. {
  178. if (!mmc)
  179. return "No MMC card found";
  180. #if CONFIG_IS_ENABLED(BLK)
  181. struct udevice *dev;
  182. if (blk_get_from_parent(mmc->dev, &dev))
  183. return "No block device";
  184. #else
  185. if (mmc_init(mmc))
  186. return "MMC init failed";
  187. #endif
  188. if (!mmc_set_env_part_init(mmc))
  189. return "MMC partition switch failed";
  190. return NULL;
  191. }
  192. static void fini_mmc_for_env(struct mmc *mmc)
  193. {
  194. mmc_set_env_part_restore(mmc);
  195. }
  196. #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
  197. static inline int write_env(struct mmc *mmc, unsigned long size,
  198. unsigned long offset, const void *buffer)
  199. {
  200. uint blk_start, blk_cnt, n;
  201. struct blk_desc *desc = mmc_get_blk_desc(mmc);
  202. blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
  203. blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
  204. n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
  205. return (n == blk_cnt) ? 0 : -1;
  206. }
  207. static int env_mmc_save(void)
  208. {
  209. ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  210. int dev = mmc_get_env_dev();
  211. struct mmc *mmc = find_mmc_device(dev);
  212. u32 offset;
  213. int ret, copy = 0;
  214. const char *errmsg;
  215. errmsg = init_mmc_for_env(mmc);
  216. if (errmsg) {
  217. printf("%s\n", errmsg);
  218. return 1;
  219. }
  220. ret = env_export(env_new);
  221. if (ret)
  222. goto fini;
  223. if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) {
  224. if (gd->env_valid == ENV_VALID)
  225. copy = 1;
  226. if (IS_ENABLED(ENV_MMC_HWPART_REDUND)) {
  227. ret = mmc_set_env_part(mmc, copy + 1);
  228. if (ret)
  229. goto fini;
  230. }
  231. }
  232. if (mmc_get_env_addr(mmc, copy, &offset)) {
  233. ret = 1;
  234. goto fini;
  235. }
  236. printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
  237. if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
  238. puts("failed\n");
  239. ret = 1;
  240. goto fini;
  241. }
  242. ret = 0;
  243. if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT))
  244. gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
  245. fini:
  246. fini_mmc_for_env(mmc);
  247. return ret;
  248. }
  249. static inline int erase_env(struct mmc *mmc, unsigned long size,
  250. unsigned long offset)
  251. {
  252. uint blk_start, blk_cnt, n;
  253. struct blk_desc *desc = mmc_get_blk_desc(mmc);
  254. u32 erase_size;
  255. erase_size = mmc->erase_grp_size * desc->blksz;
  256. blk_start = ALIGN_DOWN(offset, erase_size) / desc->blksz;
  257. blk_cnt = ALIGN(size, erase_size) / desc->blksz;
  258. n = blk_derase(desc, blk_start, blk_cnt);
  259. printf("%d blocks erased at 0x%x: %s\n", n, blk_start,
  260. (n == blk_cnt) ? "OK" : "ERROR");
  261. return (n == blk_cnt) ? 0 : 1;
  262. }
  263. static int env_mmc_erase(void)
  264. {
  265. int dev = mmc_get_env_dev();
  266. struct mmc *mmc = find_mmc_device(dev);
  267. int ret, copy = 0;
  268. u32 offset;
  269. const char *errmsg;
  270. errmsg = init_mmc_for_env(mmc);
  271. if (errmsg) {
  272. printf("%s\n", errmsg);
  273. return 1;
  274. }
  275. if (mmc_get_env_addr(mmc, copy, &offset)) {
  276. ret = CMD_RET_FAILURE;
  277. goto fini;
  278. }
  279. printf("\n");
  280. ret = erase_env(mmc, CONFIG_ENV_SIZE, offset);
  281. if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) {
  282. copy = 1;
  283. if (IS_ENABLED(ENV_MMC_HWPART_REDUND)) {
  284. ret = mmc_set_env_part(mmc, copy + 1);
  285. if (ret)
  286. goto fini;
  287. }
  288. if (mmc_get_env_addr(mmc, copy, &offset)) {
  289. ret = CMD_RET_FAILURE;
  290. goto fini;
  291. }
  292. ret |= erase_env(mmc, CONFIG_ENV_SIZE, offset);
  293. }
  294. fini:
  295. fini_mmc_for_env(mmc);
  296. return ret;
  297. }
  298. #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
  299. static inline int read_env(struct mmc *mmc, unsigned long size,
  300. unsigned long offset, const void *buffer)
  301. {
  302. uint blk_start, blk_cnt, n;
  303. struct blk_desc *desc = mmc_get_blk_desc(mmc);
  304. blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
  305. blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
  306. n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
  307. return (n == blk_cnt) ? 0 : -1;
  308. }
  309. #if defined(ENV_IS_EMBEDDED)
  310. static int env_mmc_load(void)
  311. {
  312. return 0;
  313. }
  314. #elif defined(CONFIG_SYS_REDUNDAND_ENVIRONMENT)
  315. static int env_mmc_load(void)
  316. {
  317. struct mmc *mmc;
  318. u32 offset1, offset2;
  319. int read1_fail = 0, read2_fail = 0;
  320. int ret;
  321. int dev = mmc_get_env_dev();
  322. const char *errmsg = NULL;
  323. ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
  324. ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
  325. mmc_initialize(NULL);
  326. mmc = find_mmc_device(dev);
  327. errmsg = init_mmc_for_env(mmc);
  328. if (errmsg) {
  329. ret = -EIO;
  330. goto err;
  331. }
  332. if (mmc_get_env_addr(mmc, 0, &offset1) ||
  333. mmc_get_env_addr(mmc, 1, &offset2)) {
  334. ret = -EIO;
  335. goto fini;
  336. }
  337. if (IS_ENABLED(ENV_MMC_HWPART_REDUND)) {
  338. ret = mmc_set_env_part(mmc, 1);
  339. if (ret)
  340. goto fini;
  341. }
  342. read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
  343. if (IS_ENABLED(ENV_MMC_HWPART_REDUND)) {
  344. ret = mmc_set_env_part(mmc, 2);
  345. if (ret)
  346. goto fini;
  347. }
  348. read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
  349. ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
  350. read2_fail, H_EXTERNAL);
  351. fini:
  352. fini_mmc_for_env(mmc);
  353. err:
  354. if (ret)
  355. env_set_default(errmsg, 0);
  356. return ret;
  357. }
  358. #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
  359. static int env_mmc_load(void)
  360. {
  361. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  362. struct mmc *mmc;
  363. u32 offset;
  364. int ret;
  365. int dev = mmc_get_env_dev();
  366. const char *errmsg;
  367. env_t *ep = NULL;
  368. mmc = find_mmc_device(dev);
  369. errmsg = init_mmc_for_env(mmc);
  370. if (errmsg) {
  371. ret = -EIO;
  372. goto err;
  373. }
  374. if (mmc_get_env_addr(mmc, 0, &offset)) {
  375. ret = -EIO;
  376. goto fini;
  377. }
  378. if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
  379. errmsg = "!read failed";
  380. ret = -EIO;
  381. goto fini;
  382. }
  383. ret = env_import(buf, 1, H_EXTERNAL);
  384. if (!ret) {
  385. ep = (env_t *)buf;
  386. gd->env_addr = (ulong)&ep->data;
  387. }
  388. fini:
  389. fini_mmc_for_env(mmc);
  390. err:
  391. if (ret)
  392. env_set_default(errmsg, 0);
  393. return ret;
  394. }
  395. #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
  396. U_BOOT_ENV_LOCATION(mmc) = {
  397. .location = ENVL_MMC,
  398. ENV_NAME("MMC")
  399. .load = env_mmc_load,
  400. #ifndef CONFIG_SPL_BUILD
  401. .save = env_save_ptr(env_mmc_save),
  402. .erase = ENV_ERASE_PTR(env_mmc_erase)
  403. #endif
  404. };