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