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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Marcin Bukat
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include <stdbool.h>
#include "kernel.h"
#include "system.h"
#include "power.h"
#include "ata-target.h"
void ata_reset(void)
{
/* GPIO19 */
and_l(~(1<<19), &GPIO_OUT);
sleep(1); /* > 25us */
or_l((1<<19), &GPIO_OUT);
sleep(1); /* > 25us */
}
void ata_enable(bool on)
{
static bool init = true;
/* Ide power toggling is a nasty hack to allow USB bridge operation
* in rockbox. For some reason GL811E bridge doesn't like the state
* in which rockbox leaves drive (and vice versa). The only way
* I found out to recover is to do disk power cycle (I tried toggling
* reset line of the disk but it doesn't work).
*/
/* GPO36 /reset line of GL811E */
if (on)
{
and_l(~(1<<4), &GPIO1_OUT);
#ifndef BOOTLADER
if ( !init )
{
ide_power_enable(false);
sleep(1);
ide_power_enable(true);
}
#endif
init = false;
}
else
{
#ifndef BOOTLOADER
ide_power_enable(false);
sleep(1);
ide_power_enable(true);
#endif
or_l((1<<4), &GPIO1_OUT);
}
or_l((1<<4), &GPIO1_ENABLE);
or_l((1<<4), &GPIO1_FUNCTION);
}
bool ata_is_coldstart(void)
{
/* check if ATA reset line is configured
* as GPIO
*/
return (GPIO_FUNCTION & (1<<19)) == 0;
}
void ata_device_init(void)
{
/* ATA reset line config */
or_l((1<<19), &GPIO_OUT);
or_l((1<<19), &GPIO_ENABLE);
or_l((1<<19), &GPIO_FUNCTION);
}
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