ebony.c 2.2 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788
  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * Copyright 2007 David Gibson, IBM Corporation.
  4. *
  5. * Based on earlier code:
  6. * Copyright (C) Paul Mackerras 1997.
  7. *
  8. * Matt Porter <mporter@kernel.crashing.org>
  9. * Copyright 2002-2005 MontaVista Software Inc.
  10. *
  11. * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  12. * Copyright (c) 2003, 2004 Zultys Technologies
  13. */
  14. #include <stdarg.h>
  15. #include <stddef.h>
  16. #include "types.h"
  17. #include "elf.h"
  18. #include "string.h"
  19. #include "stdio.h"
  20. #include "page.h"
  21. #include "ops.h"
  22. #include "reg.h"
  23. #include "io.h"
  24. #include "dcr.h"
  25. #include "4xx.h"
  26. #include "44x.h"
  27. static u8 *ebony_mac0, *ebony_mac1;
  28. #define EBONY_FPGA_PATH "/plb/opb/ebc/fpga"
  29. #define EBONY_FPGA_FLASH_SEL 0x01
  30. #define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash"
  31. static void ebony_flashsel_fixup(void)
  32. {
  33. void *devp;
  34. u32 reg[3] = {0x0, 0x0, 0x80000};
  35. u8 *fpga;
  36. u8 fpga_reg0 = 0x0;
  37. devp = finddevice(EBONY_FPGA_PATH);
  38. if (!devp)
  39. fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH);
  40. if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
  41. fatal("%s has missing or invalid virtual-reg property\n\r",
  42. EBONY_FPGA_PATH);
  43. fpga_reg0 = in_8(fpga);
  44. devp = finddevice(EBONY_SMALL_FLASH_PATH);
  45. if (!devp)
  46. fatal("Couldn't locate small flash node %s\n\r",
  47. EBONY_SMALL_FLASH_PATH);
  48. if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg))
  49. fatal("%s has reg property of unexpected size\n\r",
  50. EBONY_SMALL_FLASH_PATH);
  51. /* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */
  52. if (fpga_reg0 & EBONY_FPGA_FLASH_SEL)
  53. reg[1] ^= 0x80000;
  54. setprop(devp, "reg", reg, sizeof(reg));
  55. }
  56. static void ebony_fixups(void)
  57. {
  58. // FIXME: sysclk should be derived by reading the FPGA registers
  59. unsigned long sysclk = 33000000;
  60. ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
  61. ibm4xx_sdram_fixup_memsize();
  62. dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0);
  63. dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1);
  64. ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
  65. ebony_flashsel_fixup();
  66. }
  67. void ebony_init(void *mac0, void *mac1)
  68. {
  69. platform_ops.fixups = ebony_fixups;
  70. platform_ops.exit = ibm44x_dbcr_reset;
  71. ebony_mac0 = mac0;
  72. ebony_mac1 = mac1;
  73. fdt_init(_dtb_start);
  74. serial_console_init();
  75. }