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 <env.h>
  9. #include <env_internal.h>
  10. #include <linux/stddef.h>
  11. #include <errno.h>
  12. #include <memalign.h>
  13. #include <sata.h>
  14. #include <search.h>
  15. #if defined(CONFIG_ENV_OFFSET_REDUND)
  16. #error ENV REDUND not supported
  17. #endif
  18. #if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
  19. #error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
  20. #endif
  21. __weak int sata_get_env_dev(void)
  22. {
  23. return CONFIG_SYS_SATA_ENV_DEV;
  24. }
  25. #ifdef CONFIG_CMD_SAVEENV
  26. static inline int write_env(struct blk_desc *sata, unsigned long size,
  27. unsigned long offset, void *buffer)
  28. {
  29. uint blk_start, blk_cnt, n;
  30. blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  31. blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
  32. n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
  33. return (n == blk_cnt) ? 0 : -1;
  34. }
  35. static int env_sata_save(void)
  36. {
  37. ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  38. struct blk_desc *sata = NULL;
  39. int env_sata, ret;
  40. if (sata_initialize())
  41. return 1;
  42. env_sata = sata_get_env_dev();
  43. sata = sata_get_dev(env_sata);
  44. if (sata == NULL) {
  45. printf("Unknown SATA(%d) device for environment!\n",
  46. env_sata);
  47. return 1;
  48. }
  49. ret = env_export(env_new);
  50. if (ret)
  51. return 1;
  52. printf("Writing to SATA(%d)...", env_sata);
  53. if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)env_new)) {
  54. puts("failed\n");
  55. return 1;
  56. }
  57. puts("done\n");
  58. return 0;
  59. }
  60. #endif /* CONFIG_CMD_SAVEENV */
  61. static inline int read_env(struct blk_desc *sata, unsigned long size,
  62. unsigned long offset, void *buffer)
  63. {
  64. uint blk_start, blk_cnt, n;
  65. blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  66. blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
  67. n = blk_dread(sata, blk_start, blk_cnt, buffer);
  68. return (n == blk_cnt) ? 0 : -1;
  69. }
  70. static void env_sata_load(void)
  71. {
  72. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  73. struct blk_desc *sata = NULL;
  74. int env_sata;
  75. if (sata_initialize())
  76. return -EIO;
  77. env_sata = sata_get_env_dev();
  78. sata = sata_get_dev(env_sata);
  79. if (sata == NULL) {
  80. printf("Unknown SATA(%d) device for environment!\n", env_sata);
  81. return -EIO;
  82. }
  83. if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
  84. env_set_default(NULL, 0);
  85. return -EIO;
  86. }
  87. return env_import(buf, 1);
  88. }
  89. U_BOOT_ENV_LOCATION(sata) = {
  90. .location = ENVL_ESATA,
  91. ENV_NAME("SATA")
  92. .load = env_sata_load,
  93. .save = env_save_ptr(env_sata_save),
  94. };