sbf_dram_init.S 2.4 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * Board-specific sbf ddr/sdram init.
  4. *
  5. * (C) Copyright 2017 Angelo Dureghello <angelo@sysam.it>
  6. */
  7. .global sbf_dram_init
  8. .text
  9. sbf_dram_init:
  10. move.l #0xFC04002D, %a1
  11. move.b #46, (%a1) /* DDR */
  12. /* slew settings */
  13. move.l #0xEC094060, %a1
  14. move.b #0, (%a1)
  15. /* use vco instead of cpu*2 clock for ddr clock */
  16. move.l #0xEC09001A, %a1
  17. move.w #0xE01D, (%a1)
  18. /* DDR settings */
  19. move.l #0xFC0B8180, %a1
  20. move.l #0x00000000, (%a1)
  21. move.l #0x40000000, (%a1)
  22. move.l #0xFC0B81AC, %a1
  23. move.l #0x01030203, (%a1)
  24. move.l #0xFC0B8000, %a1
  25. move.l #0x01010101, (%a1)+ /* 0x00 */
  26. move.l #0x00000101, (%a1)+ /* 0x04 */
  27. move.l #0x01010100, (%a1)+ /* 0x08 */
  28. move.l #0x01010000, (%a1)+ /* 0x0C */
  29. move.l #0x00010101, (%a1)+ /* 0x10 */
  30. move.l #0xFC0B8018, %a1
  31. move.l #0x00010100, (%a1)+ /* 0x18 */
  32. move.l #0x00000001, (%a1)+ /* 0x1C */
  33. move.l #0x01000001, (%a1)+ /* 0x20 */
  34. move.l #0x00000100, (%a1)+ /* 0x24 */
  35. move.l #0x00010001, (%a1)+ /* 0x28 */
  36. move.l #0x00000200, (%a1)+ /* 0x2C */
  37. move.l #0x01000002, (%a1)+ /* 0x30 */
  38. move.l #0x00000000, (%a1)+ /* 0x34 */
  39. move.l #0x00000100, (%a1)+ /* 0x38 */
  40. move.l #0x02000100, (%a1)+ /* 0x3C */
  41. move.l #0x02000407, (%a1)+ /* 0x40 */
  42. move.l #0x02030007, (%a1)+ /* 0x44 */
  43. move.l #0x02000100, (%a1)+ /* 0x48 */
  44. move.l #0x0A030203, (%a1)+ /* 0x4C */
  45. move.l #0x00020708, (%a1)+ /* 0x50 */
  46. move.l #0x00050008, (%a1)+ /* 0x54 */
  47. move.l #0x04030002, (%a1)+ /* 0x58 */
  48. move.l #0x00000004, (%a1)+ /* 0x5C */
  49. move.l #0x020A0000, (%a1)+ /* 0x60 */
  50. move.l #0x0C00000E, (%a1)+ /* 0x64 */
  51. move.l #0x00002004, (%a1)+ /* 0x68 */
  52. move.l #0x00000000, (%a1)+ /* 0x6C */
  53. move.l #0x00100010, (%a1)+ /* 0x70 */
  54. move.l #0x00100010, (%a1)+ /* 0x74 */
  55. move.l #0x00000000, (%a1)+ /* 0x78 */
  56. move.l #0x07990000, (%a1)+ /* 0x7C */
  57. move.l #0xFC0B80A0, %a1
  58. move.l #0x00000000, (%a1)+ /* 0xA0 */
  59. move.l #0x00C80064, (%a1)+ /* 0xA4 */
  60. move.l #0x44520002, (%a1)+ /* 0xA8 */
  61. move.l #0x00C80023, (%a1)+ /* 0xAC */
  62. move.l #0xFC0B80B4, %a1
  63. move.l #0x0000C350, (%a1) /* 0xB4 */
  64. move.l #0xFC0B80E0, %a1
  65. move.l #0x04000000, (%a1)+ /* 0xE0 */
  66. move.l #0x03000304, (%a1)+ /* 0xE4 */
  67. move.l #0x40040000, (%a1)+ /* 0xE8 */
  68. move.l #0xC0004004, (%a1)+ /* 0xEC */
  69. move.l #0x0642C000, (%a1)+ /* 0xF0 */
  70. move.l #0x00000642, (%a1)+ /* 0xF4 */
  71. move.l #0xFC0B8024, %a1
  72. tpf
  73. move.l #0x01000100, (%a1) /* 0x24 */
  74. move.l #0x2000, %d1
  75. bsr asm_delay
  76. rts