sata.c 2.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
  4. */
  5. /* #define DEBUG */
  6. #include <common.h>
  7. #include <command.h>
  8. #include <environment.h>
  9. #include <linux/stddef.h>
  10. #include <errno.h>
  11. #include <memalign.h>
  12. #include <sata.h>
  13. #include <search.h>
  14. #if defined(CONFIG_ENV_SIZE_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
  15. #error ENV REDUND not supported
  16. #endif
  17. #if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
  18. #error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
  19. #endif
  20. __weak int sata_get_env_dev(void)
  21. {
  22. return CONFIG_SYS_SATA_ENV_DEV;
  23. }
  24. #ifdef CONFIG_CMD_SAVEENV
  25. static inline int write_env(struct blk_desc *sata, unsigned long size,
  26. unsigned long offset, void *buffer)
  27. {
  28. uint blk_start, blk_cnt, n;
  29. blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  30. blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
  31. n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
  32. return (n == blk_cnt) ? 0 : -1;
  33. }
  34. static int env_sata_save(void)
  35. {
  36. ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  37. struct blk_desc *sata = NULL;
  38. int env_sata, ret;
  39. if (sata_initialize())
  40. return 1;
  41. env_sata = sata_get_env_dev();
  42. sata = sata_get_dev(env_sata);
  43. if (sata == NULL) {
  44. printf("Unknown SATA(%d) device for environment!\n",
  45. env_sata);
  46. return 1;
  47. }
  48. ret = env_export(env_new);
  49. if (ret)
  50. return 1;
  51. printf("Writing to SATA(%d)...", env_sata);
  52. if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, &env_new)) {
  53. puts("failed\n");
  54. return 1;
  55. }
  56. puts("done\n");
  57. return 0;
  58. }
  59. #endif /* CONFIG_CMD_SAVEENV */
  60. static inline int read_env(struct blk_desc *sata, unsigned long size,
  61. unsigned long offset, void *buffer)
  62. {
  63. uint blk_start, blk_cnt, n;
  64. blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  65. blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
  66. n = blk_dread(sata, blk_start, blk_cnt, buffer);
  67. return (n == blk_cnt) ? 0 : -1;
  68. }
  69. static void env_sata_load(void)
  70. {
  71. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  72. struct blk_desc *sata = NULL;
  73. int env_sata;
  74. if (sata_initialize())
  75. return -EIO;
  76. env_sata = sata_get_env_dev();
  77. sata = sata_get_dev(env_sata);
  78. if (sata == NULL) {
  79. printf("Unknown SATA(%d) device for environment!\n", env_sata);
  80. return -EIO;
  81. }
  82. if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
  83. set_default_env(NULL, 0);
  84. return -EIO;
  85. }
  86. return env_import(buf, 1);
  87. }
  88. U_BOOT_ENV_LOCATION(sata) = {
  89. .location = ENVL_ESATA,
  90. ENV_NAME("SATA")
  91. .load = env_sata_load,
  92. .save = env_save_ptr(env_sata_save),
  93. };