firmware/target/coldfire/mpio/ata-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 "power.h"
  28 #include "ata-target.h"
  29
  30 void ata_reset(void)
  31 {
  32     /* GPIO19 */
  33     and_l(~(1<<19), &GPIO_OUT);
  34     sleep(1); /* > 25us */
  35
  36     or_l((1<<19), &GPIO_OUT);
  37     sleep(1); /* > 25us */
  38 }
  39
  40 void ata_enable(bool on)
  41 {
  42     static bool init = true;
  43
  44     /* Ide power toggling is a nasty hack to allow USB bridge operation
  45      * in rockbox. For some reason GL811E bridge doesn't like the state
  46      * in which rockbox leaves drive (and vice versa). The only way
  47      * I found out to recover is to do disk power cycle (I tried toggling
  48      * reset line of the disk but it doesn't work).
  49      */
  50
  51     /* GPO36  /reset line of GL811E */
  52     if (on)
  53     {
  54         and_l(~(1<<4), &GPIO1_OUT);
  55 #ifndef BOOTLOADER
  56         if ( !init )
  57         {
  58             ide_power_enable(false);
  59             sleep(1);
  60             ide_power_enable(true);
  61         }
  62 #endif
  63         init = false;
  64     }
  65     else
  66     {
  67 #ifndef BOOTLOADER
  68         ide_power_enable(false);
  69         sleep(1);
  70         ide_power_enable(true);
  71 #endif
  72         or_l((1<<4), &GPIO1_OUT);
  73     }
  74     or_l((1<<4), &GPIO1_ENABLE);
  75     or_l((1<<4), &GPIO1_FUNCTION);
  76 }
  77
  78 bool ata_is_coldstart(void)
  79 {
  80     /* check if ATA reset line is configured
  81      * as GPIO
  82      */
  83     return (GPIO_FUNCTION & (1<<19)) == 0;
  84 }
  85
  86 void ata_device_init(void)
  87 {
  88     /* ATA reset line config */
  89     or_l((1<<19), &GPIO_OUT);
  90     or_l((1<<19), &GPIO_ENABLE);
  91     or_l((1<<19), &GPIO_FUNCTION);
  92 }