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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Linus Nielsen Feltzing
*
* 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 "cpu.h"
#include "system.h"
#include "kernel.h"
#include "ata.h"
#include "usb.h"
#define USB_RST_ASSERT GPBDAT &= ~(1 << 4)
#define USB_RST_DEASSERT GPBDAT |= (1 << 4)
#define USB_VPLUS_PWR_ASSERT GPBDAT |= (1 << 6)
#define USB_VPLUS_PWR_DEASSERT GPBDAT &= ~(1 << 6)
#define USB_UNIT_IS_PRESENT !(GPFDAT & 0x01)
#define USB_CRADLE_IS_PRESENT ((GPFDAT &0x02)&&((GPGDAT&(3<<13))==(1<<13)))
#define USB_CRADLE_BUS_ENABLE GPHDAT |= (1 << 8)
#define USB_CRADLE_BUS_DISABLE GPHDAT &= ~(1 << 8)
/* The usb detect is one pin to the cpu active low */
int usb_detect(void)
{
if (USB_UNIT_IS_PRESENT | USB_CRADLE_IS_PRESENT)
return USB_INSERTED;
else
return USB_EXTRACTED;
}
void usb_init_device(void)
{
/* Input is the default configuration, only pullups need to be disabled */
/* GPFUP|=0x02; */
GPBCON=( GPBCON&~(1<<13) ) | (1 << 12);
USB_VPLUS_PWR_ASSERT;
sleep(HZ/20);
/* Reset the usb port */
GPBCON = (GPBCON & ~0x200) | 0x100; /* Make sure reset line is an output */
USB_RST_ASSERT;
sleep(HZ/25);
USB_RST_DEASSERT;
/* needed to complete the reset */
ata_enable(false);
sleep(HZ/15); /* 66ms */
ata_enable(true);
sleep(HZ/25);
/* leave chip in low power mode */
USB_VPLUS_PWR_DEASSERT;
sleep(HZ/25);
}
void usb_enable(bool on)
{
GPHCON=( GPHCON&~(1<<17) ) | (1<<16); /* Make the pin an output */
GPHUP|=1<<8; /* Disable pullup in SOC as we are now driving */
if (on)
{
USB_VPLUS_PWR_ASSERT;
if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_ENABLE;
}
else
{
if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_DISABLE;
USB_VPLUS_PWR_DEASSERT;
}
sleep(HZ/20); // > 50ms for detecting the enable state change
}
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