text: /*
   * hp6x0 Power Management Routines
   *
   * Copyright (c) 2006 Andriy Skulysh <askulsyh@gmail.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License.
   */
  #include <linux/init.h>
  #include <linux/suspend.h>
  #include <linux/errno.h>
  #include <linux/time.h>
  #include <asm/io.h>
  #include <asm/hd64461.h>
  #include <asm/hp6xx.h>
  #include <asm/cpu/dac.h>
  #include <asm/pm.h>
  
  #define STBCR		0xffffff82
  #define STBCR2		0xffffff88
  
  static int hp6x0_pm_enter(suspend_state_t state)
  {
  	u8 stbcr, stbcr2;
  #ifdef CONFIG_HD64461_ENABLER
  	u8 scr;
  	u16 hd64461_stbcr;
  #endif
  
  	if (state != PM_SUSPEND_MEM)
  		return -EINVAL;
  
  #ifdef CONFIG_HD64461_ENABLER
  	outb(0, HD64461_PCC1CSCIER);
  
  	scr = inb(HD64461_PCC1SCR);
  	scr |= HD64461_PCCSCR_VCC1;
  	outb(scr, HD64461_PCC1SCR);
  
  	hd64461_stbcr = inw(HD64461_STBCR);
  	hd64461_stbcr |= HD64461_STBCR_SPC1ST;
  	outw(hd64461_stbcr, HD64461_STBCR);
  #endif
  
  	ctrl_outb(0x1f, DACR);
  
  	stbcr = ctrl_inb(STBCR);
  	ctrl_outb(0x01, STBCR);
  
  	stbcr2 = ctrl_inb(STBCR2);
  	ctrl_outb(0x7f , STBCR2);
  
  	outw(0xf07f, HD64461_SCPUCR);
  
  	pm_enter();
  
  	outw(0, HD64461_SCPUCR);
  	ctrl_outb(stbcr, STBCR);
  	ctrl_outb(stbcr2, STBCR2);
  
  #ifdef CONFIG_HD64461_ENABLER
  	hd64461_stbcr = inw(HD64461_STBCR);
  	hd64461_stbcr &= ~HD64461_STBCR_SPC1ST;
  	outw(hd64461_stbcr, HD64461_STBCR);
  
  	outb(0x4c, HD64461_PCC1CSCIER);
  	outb(0x00, HD64461_PCC1CSCR);
  #endif
  
  	return 0;
  }
  
  /*
   * Set to PM_DISK_FIRMWARE so we can quickly veto suspend-to-disk.
   */
  static struct pm_ops hp6x0_pm_ops = {
  	.pm_disk_mode	= PM_DISK_FIRMWARE,
  	.enter		= hp6x0_pm_enter,
  };
  
  static int __init hp6x0_pm_init(void)
  {
  	pm_set_ops(&hp6x0_pm_ops);
  	return 0;
  }
  
  late_initcall(hp6x0_pm_init);
  