release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/ar7/setup.c

   1 /*
   2  * Carsten Langgaard, carstenl@mips.com
   3  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
   4  *
   5  *  This program is free software; you can distribute it and/or modify it
   6  *  under the terms of the GNU General Public License (Version 2) as
   7  *  published by the Free Software Foundation.
   8  *
   9  *  This program is distributed in the hope it will be useful, but WITHOUT
  10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  *  for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  17  */
  18 #include <linux/init.h>
  19 #include <linux/ioport.h>
  20 #include <linux/pm.h>
  21 #include <linux/time.h>
  22
  23 #include <asm/reboot.h>
  24 #include <asm/mach-ar7/ar7.h>
  25 #include <asm/mach-ar7/prom.h>
  26
  27 static void ar7_machine_restart(char *command)
  28 {
  29         u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1);
  30
  31         writel(1, softres_reg);
  32 }
  33
  34 static void ar7_machine_halt(void)
  35 {
  36         while (1)
  37                 ;
  38 }
  39
  40 static void ar7_machine_power_off(void)
  41 {
  42         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  43         u32 power_state = readl(power_reg) | (3 << 30);
  44
  45         writel(power_state, power_reg);
  46         ar7_machine_halt();
  47 }
  48
  49 const char *get_system_type(void)
  50 {
  51         u16 chip_id = ar7_chip_id();
  52         switch (chip_id) {
  53         case AR7_CHIP_7100:
  54                 return "TI AR7 (TNETD7100)";
  55         case AR7_CHIP_7200:
  56                 return "TI AR7 (TNETD7200)";
  57         case AR7_CHIP_7300:
  58                 return "TI AR7 (TNETD7300)";
  59         default:
  60                 return "TI AR7 (unknown)";
  61         }
  62 }
  63
  64 static int __init ar7_init_console(void)
  65 {
  66         return 0;
  67 }
  68 console_initcall(ar7_init_console);
  69
  70 /*
  71  * Initializes basic routines and structures pointers, memory size (as
  72  * given by the bios and saves the command line.
  73  */
  74 void __init plat_mem_setup(void)
  75 {
  76         unsigned long io_base;
  77
  78         _machine_restart = ar7_machine_restart;
  79         _machine_halt = ar7_machine_halt;
  80         pm_power_off = ar7_machine_power_off;
  81         panic_timeout = 3;
  82
  83         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
  84         if (!io_base)
  85                 panic("Can't remap IO base!\n");
  86         set_io_port_base(io_base);
  87
  88         prom_meminit();
  89
  90         printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
  91                         get_system_type(), ar7_chip_id(), ar7_chip_rev());
  92 }