LXR linux/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
  31static 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
  42void 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}
  48EXPORT_SYMBOL_GPL(ps3_sys_manager_register_ops);
  49
  50void __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
  58void __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
  66void __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
  74