soc_ti_k3.c 2.4 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132
  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 AM64X 0xbb38
  14. #define REV_SR1_0 0
  15. #define REV_SR2_0 1
  16. #define JTAG_ID_VARIANT_SHIFT 28
  17. #define JTAG_ID_VARIANT_MASK (0xf << 28)
  18. #define JTAG_ID_PARTNO_SHIFT 12
  19. #define JTAG_ID_PARTNO_MASK (0xffff << 12)
  20. struct soc_ti_k3_plat {
  21. const char *family;
  22. const char *revision;
  23. };
  24. static const char *get_family_string(u32 idreg)
  25. {
  26. const char *family;
  27. u32 soc;
  28. soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
  29. switch (soc) {
  30. case AM65X:
  31. family = "AM65X";
  32. break;
  33. case J721E:
  34. family = "J721E";
  35. break;
  36. case J7200:
  37. family = "J7200";
  38. break;
  39. case AM64X:
  40. family = "AM64X";
  41. break;
  42. default:
  43. family = "Unknown Silicon";
  44. };
  45. return family;
  46. }
  47. static const char *get_rev_string(u32 idreg)
  48. {
  49. const char *revision;
  50. u32 rev;
  51. rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
  52. switch (rev) {
  53. case REV_SR1_0:
  54. revision = "1.0";
  55. break;
  56. case REV_SR2_0:
  57. revision = "2.0";
  58. break;
  59. default:
  60. revision = "Unknown Revision";
  61. };
  62. return revision;
  63. }
  64. static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
  65. {
  66. struct soc_ti_k3_plat *plat = dev_get_plat(dev);
  67. snprintf(buf, size, "%s", plat->family);
  68. return 0;
  69. }
  70. static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
  71. {
  72. struct soc_ti_k3_plat *plat = dev_get_plat(dev);
  73. snprintf(buf, size, "SR%s", plat->revision);
  74. return 0;
  75. }
  76. static const struct soc_ops soc_ti_k3_ops = {
  77. .get_family = soc_ti_k3_get_family,
  78. .get_revision = soc_ti_k3_get_revision,
  79. };
  80. int soc_ti_k3_probe(struct udevice *dev)
  81. {
  82. struct soc_ti_k3_plat *plat = dev_get_plat(dev);
  83. u32 idreg;
  84. void *idreg_addr;
  85. idreg_addr = dev_read_addr_ptr(dev);
  86. if (!idreg_addr)
  87. return -EINVAL;
  88. idreg = readl(idreg_addr);
  89. plat->family = get_family_string(idreg);
  90. plat->revision = get_rev_string(idreg);
  91. return 0;
  92. }
  93. static const struct udevice_id soc_ti_k3_ids[] = {
  94. { .compatible = "ti,am654-chipid" },
  95. { }
  96. };
  97. U_BOOT_DRIVER(soc_ti_k3) = {
  98. .name = "soc_ti_k3",
  99. .id = UCLASS_SOC,
  100. .ops = &soc_ti_k3_ops,
  101. .of_match = soc_ti_k3_ids,
  102. .probe = soc_ti_k3_probe,
  103. .plat_auto = sizeof(struct soc_ti_k3_plat),
  104. };