setup.c 2.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Carsten Langgaard, carstenl@mips.com
  4. * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
  5. */
  6. #include <linux/init.h>
  7. #include <linux/ioport.h>
  8. #include <linux/pm.h>
  9. #include <linux/time.h>
  10. #include <asm/reboot.h>
  11. #include <asm/mach-ar7/ar7.h>
  12. #include <asm/mach-ar7/prom.h>
  13. static void ar7_machine_restart(char *command)
  14. {
  15. u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1);
  16. writel(1, softres_reg);
  17. }
  18. static void ar7_machine_halt(void)
  19. {
  20. while (1)
  21. ;
  22. }
  23. static void ar7_machine_power_off(void)
  24. {
  25. u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  26. u32 power_state = readl(power_reg) | (3 << 30);
  27. writel(power_state, power_reg);
  28. ar7_machine_halt();
  29. }
  30. const char *get_system_type(void)
  31. {
  32. u16 chip_id = ar7_chip_id();
  33. u16 titan_variant_id = titan_chip_id();
  34. switch (chip_id) {
  35. case AR7_CHIP_7100:
  36. return "TI AR7 (TNETD7100)";
  37. case AR7_CHIP_7200:
  38. return "TI AR7 (TNETD7200)";
  39. case AR7_CHIP_7300:
  40. return "TI AR7 (TNETD7300)";
  41. case AR7_CHIP_TITAN:
  42. switch (titan_variant_id) {
  43. case TITAN_CHIP_1050:
  44. return "TI AR7 (TNETV1050)";
  45. case TITAN_CHIP_1055:
  46. return "TI AR7 (TNETV1055)";
  47. case TITAN_CHIP_1056:
  48. return "TI AR7 (TNETV1056)";
  49. case TITAN_CHIP_1060:
  50. return "TI AR7 (TNETV1060)";
  51. }
  52. fallthrough;
  53. default:
  54. return "TI AR7 (unknown)";
  55. }
  56. }
  57. static int __init ar7_init_console(void)
  58. {
  59. return 0;
  60. }
  61. console_initcall(ar7_init_console);
  62. /*
  63. * Initializes basic routines and structures pointers, memory size (as
  64. * given by the bios and saves the command line.
  65. */
  66. void __init plat_mem_setup(void)
  67. {
  68. unsigned long io_base;
  69. _machine_restart = ar7_machine_restart;
  70. _machine_halt = ar7_machine_halt;
  71. pm_power_off = ar7_machine_power_off;
  72. io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
  73. if (!io_base)
  74. panic("Can't remap IO base!");
  75. set_io_port_base(io_base);
  76. prom_meminit();
  77. printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
  78. get_system_type(), ar7_chip_id(), ar7_chip_rev());
  79. }