vbe.c 2.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Verified Boot for Embedded (VBE) access functions
  4. *
  5. * Copyright 2022 Google LLC
  6. * Written by Simon Glass <sjg@chromium.org>
  7. */
  8. #include <common.h>
  9. #include <bootmeth.h>
  10. #include <bootstd.h>
  11. #include <dm.h>
  12. #include <image.h>
  13. #include <vbe.h>
  14. #include <dm/uclass-internal.h>
  15. /**
  16. * is_vbe() - Check if a device is a VBE method
  17. *
  18. * @dev: Device to check
  19. * @return true if this is a VBE bootmth device, else false
  20. */
  21. static bool is_vbe(struct udevice *dev)
  22. {
  23. return !strncmp("vbe", dev->driver->name, 3);
  24. }
  25. int vbe_find_next_device(struct udevice **devp)
  26. {
  27. for (uclass_find_next_device(devp);
  28. *devp;
  29. uclass_find_next_device(devp)) {
  30. if (is_vbe(*devp))
  31. return 0;
  32. }
  33. return 0;
  34. }
  35. int vbe_find_first_device(struct udevice **devp)
  36. {
  37. uclass_find_first_device(UCLASS_BOOTMETH, devp);
  38. if (!*devp || is_vbe(*devp))
  39. return 0;
  40. return vbe_find_next_device(devp);
  41. }
  42. int vbe_list(void)
  43. {
  44. struct bootstd_priv *std;
  45. struct udevice *dev;
  46. int ret;
  47. ret = bootstd_get_priv(&std);
  48. if (ret)
  49. return ret;
  50. printf("%3s %-3s %-15s %-15s %s\n", "#", "Sel", "Device", "Driver",
  51. "Description");
  52. printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
  53. "--------------", "-----------");
  54. for (ret = vbe_find_first_device(&dev); dev;
  55. ret = vbe_find_next_device(&dev)) {
  56. const struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
  57. printf("%3d %-3s %-15s %-15s %s\n", dev_seq(dev),
  58. std->vbe_bootmeth == dev ? "*" : "", dev->name,
  59. dev->driver->name, plat->desc);
  60. }
  61. printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
  62. "--------------", "-----------");
  63. return 0;
  64. }
  65. int vbe_select(struct udevice *dev)
  66. {
  67. struct bootstd_priv *std;
  68. int ret;
  69. ret = bootstd_get_priv(&std);
  70. if (ret)
  71. return ret;
  72. std->vbe_bootmeth = dev;
  73. return 0;
  74. }
  75. int vbe_find_by_any(const char *name, struct udevice **devp)
  76. {
  77. struct udevice *dev;
  78. int ret, seq;
  79. char *endp;
  80. seq = simple_strtol(name, &endp, 16);
  81. /* Select by name */
  82. if (*endp) {
  83. ret = uclass_get_device_by_name(UCLASS_BOOTMETH, name, &dev);
  84. if (ret) {
  85. printf("Cannot probe VBE bootmeth '%s' (err=%d)\n", name,
  86. ret);
  87. return ret;
  88. }
  89. /* select by number */
  90. } else {
  91. ret = uclass_get_device_by_seq(UCLASS_BOOTMETH, seq, &dev);
  92. if (ret) {
  93. printf("Cannot find '%s' (err=%d)\n", name, ret);
  94. return ret;
  95. }
  96. }
  97. *devp = dev;
  98. return 0;
  99. }