m54451evb.c 1.9 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 <common.h>
  10. #include <spi.h>
  11. #include <asm/immap.h>
  12. #include <asm/io.h>
  13. DECLARE_GLOBAL_DATA_PTR;
  14. int checkboard(void)
  15. {
  16. /*
  17. * need to to:
  18. * Check serial flash size. if 2mb evb, else 8mb demo
  19. */
  20. puts("Board: ");
  21. puts("Freescale M54451 EVB\n");
  22. return 0;
  23. };
  24. int dram_init(void)
  25. {
  26. u32 dramsize;
  27. #ifdef CONFIG_CF_SBF
  28. /*
  29. * Serial Boot: The dram is already initialized in start.S
  30. * only require to return DRAM size
  31. */
  32. dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
  33. #else
  34. sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
  35. gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
  36. u32 i;
  37. dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
  38. if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) &&
  39. (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2))
  40. return dramsize;
  41. for (i = 0x13; i < 0x20; i++) {
  42. if (dramsize == (1 << i))
  43. break;
  44. }
  45. i--;
  46. out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
  47. out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
  48. out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
  49. out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
  50. udelay(200);
  51. /* Issue PALL */
  52. out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
  53. __asm__("nop");
  54. /* Perform two refresh cycles */
  55. out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
  56. __asm__("nop");
  57. out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
  58. __asm__("nop");
  59. /* Issue LEMR */
  60. out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
  61. __asm__("nop");
  62. out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
  63. __asm__("nop");
  64. out_be32(&sdram->sdcr,
  65. (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000);
  66. udelay(100);
  67. #endif
  68. gd->ram_size = dramsize;
  69. return 0;
  70. };
  71. int testdram(void)
  72. {
  73. /* TODO: XXX XXX XXX */
  74. printf("DRAM test not implemented!\n");
  75. return (0);
  76. }