firmware/target/coldfire/mpio/power-mpio.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 Marcin Bukat
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "config.h"
  23 #include "cpu.h"
  24 #include <stdbool.h>
  25 #include "kernel.h"
  26 #include "system.h"
  27 #include "lcd.h"
  28 #include "power.h"
  29
  30 #if CONFIG_TUNER
  31 bool tuner_power(bool status)
  32 {
  33     if (status)
  34         and_l(~(1<<17), &GPIO1_OUT);
  35     else
  36         or_l((1<<17), &GPIO1_OUT);
  37
  38     return status;
  39 }
  40 #endif /* #if CONFIG_TUNER */
  41
  42 void power_init(void)
  43 {
  44     /* GPIO53 has to be high - low resets device
  45      * it is setup in crt0.S
  46      */
  47
  48     /* GPIO50 is ATA power (default OFF) */
  49     or_l((1<<18), &GPIO1_OUT);
  50     or_l((1<<18), &GPIO1_ENABLE);
  51     or_l((1<<18), &GPIO1_FUNCTION);
  52
  53     /* GPIO49 is FM power (default OFF) */
  54     or_l((1<<17), &GPIO1_OUT);
  55     or_l((1<<17), &GPIO1_ENABLE);
  56     or_l((1<<17), &GPIO1_FUNCTION);
  57
  58     /* GPIO46 is wall charger detect (input) */
  59     and_l(~(1<<14), &GPIO1_ENABLE);
  60     or_l((1<<14), &GPIO1_FUNCTION);
  61
  62     /* GPIO31 needs to be low */
  63     and_l(~(1<<31), &GPIO_OUT);
  64     or_l((1<<31),&GPIO_ENABLE);
  65     or_l((1<<31),&GPIO_FUNCTION);
  66
  67     /* turn off charger by default*/
  68     or_l((1<<23), &GPIO_OUT);
  69     or_l((1<<23), &GPIO_ENABLE);
  70     or_l((1<<23), &GPIO_FUNCTION);
  71
  72     /* high current charge mode */
  73     or_l((1<<15), &GPIO_OUT);
  74     or_l((1<<15),&GPIO_ENABLE);
  75     or_l((1<<15),&GPIO_FUNCTION);
  76
  77 #ifndef BOOTLOADER
  78     /* The boot loader controls the power */
  79     ide_power_enable(true);
  80 #endif
  81 }
  82
  83 unsigned int power_input_status(void)
  84 {
  85     unsigned int status = POWER_INPUT_NONE;
  86 /* GPIO46 is AC plug detect (low = AC plugged) */
  87     if (!(GPIO1_READ & (1<<14)))
  88     {
  89         status |= POWER_INPUT_MAIN_CHARGER;
  90         /* tristate GPIO23 to start charging cycle */
  91         and_l(~(1<<23), &GPIO_ENABLE);
  92     }
  93     else
  94     {
  95         /* drive GPIO23 high to enter LTC1733 shutdown mode */
  96         or_l((1<<23), &GPIO_ENABLE);
  97     }
  98     return status;
  99 }
 100
 101 /* Returns true if the unit is charging the batteries. */
 102 bool charging_state(void)
 103 {
 104     if (!(GPIO1_READ & (1<<14)))
 105         return (GPIO_READ & (1<<30) )?false:true;
 106     else
 107         return false;
 108 }
 109
 110 void ide_power_enable(bool on)
 111 {
 112     if (on)
 113         and_l(~(1<<18),&GPIO1_OUT);
 114     else
 115         or_l((1<<18),&GPIO1_OUT);
 116 }
 117
 118 bool ide_powered(void)
 119 {
 120     return (GPIO1_OUT & (1<<18))?false:true;
 121 }
 122
 123 void power_off(void)
 124 {
 125 #ifdef HAVE_LCD_SHUTDOWN
 126     lcd_shutdown();
 127 #endif
 128     set_irq_level(DISABLE_INTERRUPTS);
 129     and_l(~(1<<21), &GPIO1_OUT); /* pull KEEPACT low */
 130     asm("halt");
 131     while(1);
 132 }