arch/mips/ar7/setup.c

   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
  11 #include <asm/reboot.h>
  12 #include <asm/mach-ar7/ar7.h>
  13 #include <asm/mach-ar7/prom.h>
  14
  15 static void ar7_machine_restart(char *command)
  16 {
  17         u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1);
  18
  19         writel(1, softres_reg);
  20 }
  21
  22 static void ar7_machine_halt(void)
  23 {
  24         while (1)
  25                 ;
  26 }
  27
  28 static void ar7_machine_power_off(void)
  29 {
  30         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  31         u32 power_state = readl(power_reg) | (3 << 30);
  32
  33         writel(power_state, power_reg);
  34         ar7_machine_halt();
  35 }
  36
  37 const char *get_system_type(void)
  38 {
  39         u16 chip_id = ar7_chip_id();
  40         u16 titan_variant_id = titan_chip_id();
  41
  42         switch (chip_id) {
  43         case AR7_CHIP_7100:
  44                 return "TI AR7 (TNETD7100)";
  45         case AR7_CHIP_7200:
  46                 return "TI AR7 (TNETD7200)";
  47         case AR7_CHIP_7300:
  48                 return "TI AR7 (TNETD7300)";
  49         case AR7_CHIP_TITAN:
  50                 switch (titan_variant_id) {
  51                 case TITAN_CHIP_1050:
  52                         return "TI AR7 (TNETV1050)";
  53                 case TITAN_CHIP_1055:
  54                         return "TI AR7 (TNETV1055)";
  55                 case TITAN_CHIP_1056:
  56                         return "TI AR7 (TNETV1056)";
  57                 case TITAN_CHIP_1060:
  58                         return "TI AR7 (TNETV1060)";
  59                 }
  60                 fallthrough;
  61         default:
  62                 return "TI AR7 (unknown)";
  63         }
  64 }
  65
  66 static int __init ar7_init_console(void)
  67 {
  68         return 0;
  69 }
  70 console_initcall(ar7_init_console);
  71
  72 /*
  73  * Initializes basic routines and structures pointers, memory size (as
  74  * given by the bios and saves the command line.
  75  */
  76 void __init plat_mem_setup(void)
  77 {
  78         unsigned long io_base;
  79
  80         _machine_restart = ar7_machine_restart;
  81         _machine_halt = ar7_machine_halt;
  82         pm_power_off = ar7_machine_power_off;
  83
  84         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
  85         if (!io_base)
  86                 panic("Can't remap IO base!");
  87         set_io_port_base(io_base);
  88
  89         prom_meminit();
  90
  91         printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
  92                         get_system_type(), ar7_chip_id(), ar7_chip_rev());
  93 }