arch/sh/boards/hp6xx/pm.c

   1 /*
   2  * hp6x0 Power Management Routines
   3  *
   4  * Copyright (c) 2006 Andriy Skulysh <askulsyh@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License.
   8  */
   9 #include <linux/init.h>
  10 #include <linux/suspend.h>
  11 #include <linux/errno.h>
  12 #include <linux/time.h>
  13 #include <asm/io.h>
  14 #include <asm/hd64461.h>
  15 #include <asm/hp6xx.h>
  16 #include <asm/cpu/dac.h>
  17 #include <asm/pm.h>
  18
  19 #define STBCR           0xffffff82
  20 #define STBCR2          0xffffff88
  21
  22 static int hp6x0_pm_enter(suspend_state_t state)
  23 {
  24         u8 stbcr, stbcr2;
  25 #ifdef CONFIG_HD64461_ENABLER
  26         u8 scr;
  27         u16 hd64461_stbcr;
  28 #endif
  29
  30 #ifdef CONFIG_HD64461_ENABLER
  31         outb(0, HD64461_PCC1CSCIER);
  32
  33         scr = inb(HD64461_PCC1SCR);
  34         scr |= HD64461_PCCSCR_VCC1;
  35         outb(scr, HD64461_PCC1SCR);
  36
  37         hd64461_stbcr = inw(HD64461_STBCR);
  38         hd64461_stbcr |= HD64461_STBCR_SPC1ST;
  39         outw(hd64461_stbcr, HD64461_STBCR);
  40 #endif
  41
  42         ctrl_outb(0x1f, DACR);
  43
  44         stbcr = ctrl_inb(STBCR);
  45         ctrl_outb(0x01, STBCR);
  46
  47         stbcr2 = ctrl_inb(STBCR2);
  48         ctrl_outb(0x7f , STBCR2);
  49
  50         outw(0xf07f, HD64461_SCPUCR);
  51
  52         pm_enter();
  53
  54         outw(0, HD64461_SCPUCR);
  55         ctrl_outb(stbcr, STBCR);
  56         ctrl_outb(stbcr2, STBCR2);
  57
  58 #ifdef CONFIG_HD64461_ENABLER
  59         hd64461_stbcr = inw(HD64461_STBCR);
  60         hd64461_stbcr &= ~HD64461_STBCR_SPC1ST;
  61         outw(hd64461_stbcr, HD64461_STBCR);
  62
  63         outb(0x4c, HD64461_PCC1CSCIER);
  64         outb(0x00, HD64461_PCC1CSCR);
  65 #endif
  66
  67         return 0;
  68 }
  69
  70 static struct platform_suspend_ops hp6x0_pm_ops = {
  71         .enter          = hp6x0_pm_enter,
  72         .valid          = suspend_valid_only_mem,
  73 };
  74
  75 static int __init hp6x0_pm_init(void)
  76 {
  77         suspend_set_ops(&hp6x0_pm_ops);
  78         return 0;
  79 }
  80
  81 late_initcall(hp6x0_pm_init);