drivers/ps3/sys-manager-core.c

   1 /*
   2  *  PS3 System Manager core.
   3  *
   4  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   5  *  Copyright 2007 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <asm/lv1call.h>
  23 #include <asm/ps3.h>
  24
  25 /**
  26  * Staticly linked routines that allow late binding of a loaded sys-manager
  27  * module.
  28  */
  29
  30 static struct ps3_sys_manager_ops ps3_sys_manager_ops;
  31
  32 /**
  33  * ps3_register_sys_manager_ops - Bind ps3_sys_manager_ops to a module.
  34  * @ops: struct ps3_sys_manager_ops.
  35  *
  36  * To be called from ps3_sys_manager_probe() and ps3_sys_manager_remove() to
  37  * register call back ops for power control.  Copies data to the static
  38  * variable ps3_sys_manager_ops.
  39  */
  40
  41 void ps3_sys_manager_register_ops(const struct ps3_sys_manager_ops *ops)
  42 {
  43         BUG_ON(!ops);
  44         BUG_ON(!ops->dev);
  45         ps3_sys_manager_ops = ops ? *ops : ps3_sys_manager_ops;
  46 }
  47 EXPORT_SYMBOL_GPL(ps3_sys_manager_register_ops);
  48
  49 void ps3_sys_manager_power_off(void)
  50 {
  51         if (ps3_sys_manager_ops.power_off)
  52                 ps3_sys_manager_ops.power_off(ps3_sys_manager_ops.dev);
  53
  54         ps3_sys_manager_halt();
  55 }
  56
  57 void ps3_sys_manager_restart(void)
  58 {
  59         if (ps3_sys_manager_ops.restart)
  60                 ps3_sys_manager_ops.restart(ps3_sys_manager_ops.dev);
  61
  62         ps3_sys_manager_halt();
  63 }
  64
  65 void ps3_sys_manager_halt(void)
  66 {
  67         pr_emerg("System Halted, OK to turn off power\n");
  68         local_irq_disable();
  69         while (1)
  70                 lv1_pause(1);
  71 }
  72