m5208evbe.c 1.6 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2000-2003
  4. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  5. *
  6. * Copyright (C) 2004-2008, 2012 Freescale Semiconductor, Inc.
  7. * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  8. */
  9. #include <config.h>
  10. #include <common.h>
  11. #include <init.h>
  12. #include <asm/immap.h>
  13. #include <asm/io.h>
  14. DECLARE_GLOBAL_DATA_PTR;
  15. int checkboard(void)
  16. {
  17. puts("Board: ");
  18. puts("Freescale M5208EVBe\n");
  19. return 0;
  20. };
  21. int dram_init(void)
  22. {
  23. sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
  24. u32 dramsize, i;
  25. dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
  26. for (i = 0x13; i < 0x20; i++) {
  27. if (dramsize == (1 << i))
  28. break;
  29. }
  30. i--;
  31. out_be32(&sdram->cs0, CONFIG_SYS_SDRAM_BASE | i);
  32. #ifdef CONFIG_SYS_SDRAM_BASE1
  33. out_be32(&sdram->cs1, CONFIG_SYS_SDRAM_BASE | i);
  34. #endif
  35. out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
  36. out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
  37. udelay(500);
  38. /* Issue PALL */
  39. out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  40. asm("nop");
  41. /* Perform two refresh cycles */
  42. out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  43. out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  44. asm("nop");
  45. /* Issue LEMR */
  46. out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
  47. asm("nop");
  48. out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
  49. asm("nop");
  50. out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  51. asm("nop");
  52. out_be32(&sdram->ctrl,
  53. (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000F00);
  54. asm("nop");
  55. udelay(100);
  56. gd->ram_size = dramsize;
  57. return 0;
  58. };
  59. int testdram(void)
  60. {
  61. /* TODO: XXX XXX XXX */
  62. printf("DRAM test not implemented!\n");
  63. return (0);
  64. }