soc_ti_k3.c 2.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
  4. * Dave Gerlach <d-gerlach@ti.com>
  5. */
  6. #include <common.h>
  7. #include <dm.h>
  8. #include <soc.h>
  9. #include <asm/io.h>
  10. #define AM65X 0xbb5a
  11. #define J721E 0xbb64
  12. #define J7200 0xbb6d
  13. #define REV_SR1_0 0
  14. #define REV_SR2_0 1
  15. #define JTAG_ID_VARIANT_SHIFT 28
  16. #define JTAG_ID_VARIANT_MASK (0xf << 28)
  17. #define JTAG_ID_PARTNO_SHIFT 12
  18. #define JTAG_ID_PARTNO_MASK (0xffff << 12)
  19. struct soc_ti_k3_platdata {
  20. const char *family;
  21. const char *revision;
  22. };
  23. static const char *get_family_string(u32 idreg)
  24. {
  25. const char *family;
  26. u32 soc;
  27. soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
  28. switch (soc) {
  29. case AM65X:
  30. family = "AM65X";
  31. break;
  32. case J721E:
  33. family = "J721E";
  34. break;
  35. case J7200:
  36. family = "J7200";
  37. break;
  38. default:
  39. family = "Unknown Silicon";
  40. };
  41. return family;
  42. }
  43. static const char *get_rev_string(u32 idreg)
  44. {
  45. const char *revision;
  46. u32 rev;
  47. rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
  48. switch (rev) {
  49. case REV_SR1_0:
  50. revision = "1.0";
  51. break;
  52. case REV_SR2_0:
  53. revision = "2.0";
  54. break;
  55. default:
  56. revision = "Unknown Revision";
  57. };
  58. return revision;
  59. }
  60. static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
  61. {
  62. struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
  63. snprintf(buf, size, "%s", plat->family);
  64. return 0;
  65. }
  66. static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
  67. {
  68. struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
  69. snprintf(buf, size, "SR%s", plat->revision);
  70. return 0;
  71. }
  72. static const struct soc_ops soc_ti_k3_ops = {
  73. .get_family = soc_ti_k3_get_family,
  74. .get_revision = soc_ti_k3_get_revision,
  75. };
  76. int soc_ti_k3_probe(struct udevice *dev)
  77. {
  78. struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
  79. u32 idreg;
  80. void *idreg_addr;
  81. idreg_addr = dev_read_addr_ptr(dev);
  82. if (!idreg_addr)
  83. return -EINVAL;
  84. idreg = readl(idreg_addr);
  85. plat->family = get_family_string(idreg);
  86. plat->revision = get_rev_string(idreg);
  87. return 0;
  88. }
  89. static const struct udevice_id soc_ti_k3_ids[] = {
  90. { .compatible = "ti,am654-chipid" },
  91. { }
  92. };
  93. U_BOOT_DRIVER(soc_ti_k3) = {
  94. .name = "soc_ti_k3",
  95. .id = UCLASS_SOC,
  96. .ops = &soc_ti_k3_ops,
  97. .of_match = soc_ti_k3_ids,
  98. .probe = soc_ti_k3_probe,
  99. .platdata_auto_alloc_size = sizeof(struct soc_ti_k3_platdata),
  100. };