arch/mips/mips-boards/generic/reset.c

   1 /*
   2  * Carsten Langgaard, carstenl@mips.com
   3  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
   4  *
   5  * ########################################################################
   6  *
   7  *  This program is free software; you can distribute it and/or modify it
   8  *  under the terms of the GNU General Public License (Version 2) as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope it will be useful, but WITHOUT
  12  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  *  for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, write to the Free Software Foundation, Inc.,
  18  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  19  *
  20  * ########################################################################
  21  *
  22  * Reset the MIPS boards.
  23  *
  24  */
  25 #include <linux/pm.h>
  26
  27 #include <asm/io.h>
  28 #include <asm/reboot.h>
  29 #include <asm/mips-boards/generic.h>
  30 #if defined(CONFIG_MIPS_ATLAS)
  31 #include <asm/mips-boards/atlas.h>
  32 #endif
  33
  34 static void mips_machine_restart(char *command);
  35 static void mips_machine_halt(void);
  36 #if defined(CONFIG_MIPS_ATLAS)
  37 static void atlas_machine_power_off(void);
  38 #endif
  39
  40 static void mips_machine_restart(char *command)
  41 {
  42         unsigned int __iomem *softres_reg =
  43                 ioremap(SOFTRES_REG, sizeof(unsigned int));
  44
  45         __raw_writel(GORESET, softres_reg);
  46 }
  47
  48 static void mips_machine_halt(void)
  49 {
  50         unsigned int __iomem *softres_reg =
  51                 ioremap(SOFTRES_REG, sizeof(unsigned int));
  52
  53         __raw_writel(GORESET, softres_reg);
  54 }
  55
  56 #if defined(CONFIG_MIPS_ATLAS)
  57 static void atlas_machine_power_off(void)
  58 {
  59         unsigned int __iomem *psustby_reg = ioremap(ATLAS_PSUSTBY_REG, sizeof(unsigned int));
  60
  61         writew(ATLAS_GOSTBY, psustby_reg);
  62 }
  63 #endif
  64
  65 void mips_reboot_setup(void)
  66 {
  67         _machine_restart = mips_machine_restart;
  68         _machine_halt = mips_machine_halt;
  69 #if defined(CONFIG_MIPS_ATLAS)
  70         pm_power_off = atlas_machine_power_off;
  71 #endif
  72 #if defined(CONFIG_MIPS_MALTA) || defined(CONFIG_MIPS_SEAD)
  73         pm_power_off = mips_machine_halt;
  74 #endif
  75 }