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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Jens Arnold
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include <stdbool.h>
#include "adc.h"
#include "ata_mmc.h"
#include "cpu.h"
#include "hwcompat.h"
#include "system.h"
bool usb_detect(void)
{
return (adc_read(ADC_USB_POWER) <= 512) ? true : false;
}
void usb_enable(bool on)
{
if (on)
{
mmc_enable_int_flash_clock(!mmc_detect());
if (!(HW_MASK & MMC_CLOCK_POLARITY))
and_b(~0x20, &PBDRH); /* old circuit needs SCK1 = low while on USB */
or_b(0x20, &PADRL); /* enable USB */
and_b(~0x08, &PADRL); /* assert card detect */
}
else
{
if (!(HW_MASK & MMC_CLOCK_POLARITY))
or_b(0x20, &PBDRH); /* reset SCK1 = high for old circuit */
and_b(~0x20, &PADRL); /* disable USB */
or_b(0x08, &PADRL); /* deassert card detect */
}
}
void usb_init_device(void)
{
PACR2 &= ~0x04C0; /* use PA3 (card detect) and PA5 (USB enabled) as GPIO */
and_b(~0x20, &PADRL); /* disable USB */
or_b(0x08, &PADRL); /* deassert card detect */
or_b(0x28, &PAIORL); /* output for USB enable and card detect */
}
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