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 <linux/export.h>
  23 #include <asm/lv1call.h>
  24 #include <asm/ps3.h>
  25
  26 /**
  27  * Staticly linked routines that allow late binding of a loaded sys-manager
  28  * module.
  29  */
  30
  31 static struct ps3_sys_manager_ops ps3_sys_manager_ops;
  32
  33 /**
  34  * ps3_register_sys_manager_ops - Bind ps3_sys_manager_ops to a module.
  35  * @ops: struct ps3_sys_manager_ops.
  36  *
  37  * To be called from ps3_sys_manager_probe() and ps3_sys_manager_remove() to
  38  * register call back ops for power control.  Copies data to the static
  39  * variable ps3_sys_manager_ops.
  40  */
  41
  42 void ps3_sys_manager_register_ops(const struct ps3_sys_manager_ops *ops)
  43 {
  44         BUG_ON(!ops);
  45         BUG_ON(!ops->dev);
  46         ps3_sys_manager_ops = ops ? *ops : ps3_sys_manager_ops;
  47 }
  48 EXPORT_SYMBOL_GPL(ps3_sys_manager_register_ops);
  49
  50 void __noreturn ps3_sys_manager_power_off(void)
  51 {
  52         if (ps3_sys_manager_ops.power_off)
  53                 ps3_sys_manager_ops.power_off(ps3_sys_manager_ops.dev);
  54
  55         ps3_sys_manager_halt();
  56 }
  57
  58 void __noreturn ps3_sys_manager_restart(void)
  59 {
  60         if (ps3_sys_manager_ops.restart)
  61                 ps3_sys_manager_ops.restart(ps3_sys_manager_ops.dev);
  62
  63         ps3_sys_manager_halt();
  64 }
  65
  66 void __noreturn ps3_sys_manager_halt(void)
  67 {
  68         pr_emerg("System Halted, OK to turn off power\n");
  69         local_irq_disable();
  70         while (1)
  71                 lv1_pause(1);
  72 }
  73