568c441fd8
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31498 a1c6a512-1295-4272-9138-f99709370657
100 lines
2.7 KiB
C
100 lines
2.7 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) 2006 by Linus Nielsen Feltzing
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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 "system.h"
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#include "kernel.h"
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#include "ata.h"
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#include "usb.h"
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#define USB_RST_ASSERT GPBDAT &= ~(1 << 4)
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#define USB_RST_DEASSERT GPBDAT |= (1 << 4)
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#define USB_VBUS_PWR_ASSERT GPBDAT |= (1 << 6)
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#define USB_VBUS_PWR_DEASSERT GPBDAT &= ~(1 << 6)
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#define USB_UNIT_IS_PRESENT !(GPFDAT & 0x01)
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#define USB_CRADLE_IS_PRESENT ((GPFDAT &0x02)&&((GPGDAT&(3<<13))==(1<<13)))
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#define USB_CRADLE_BUS_ENABLE GPHDAT |= (1 << 8)
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#define USB_CRADLE_BUS_DISABLE GPHDAT &= ~(1 << 8)
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/* The usb detect is one pin to the cpu active low */
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int usb_detect(void)
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{
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if (USB_UNIT_IS_PRESENT | USB_CRADLE_IS_PRESENT)
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return USB_INSERTED;
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else
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return USB_EXTRACTED;
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}
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void usb_init_device(void)
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{
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/* Setup USB Cradle Power control (output, disabled, no pullup) */
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GPHCON=( GPHCON&~(1<<17) ) | (1<<16);
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GPHUP|=1<<8;
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USB_CRADLE_BUS_DISABLE;
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/* Setup VBUS PWR (output, asserted, no pullup) */
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GPBCON=( GPBCON&~(1<<13) ) | (1 << 12);
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GPBUP|=1<<6;
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USB_VBUS_PWR_ASSERT;
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sleep(HZ/20);
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/* Setup USB reset (output, asserted, no pullup) */
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GPBCON = (GPBCON & ~0x200) | 0x100; /* Make sure reset line is an output */
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GPBUP|=1<<4;
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USB_RST_ASSERT;
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sleep(HZ/25);
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USB_RST_DEASSERT;
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/* needed to complete the reset */
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ata_enable(false);
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sleep(HZ/15); /* 66ms */
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ata_enable(true);
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sleep(HZ/25);
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/* leave chip in low power mode */
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USB_VBUS_PWR_DEASSERT;
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sleep(HZ/25);
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}
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void usb_enable(bool on)
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{
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if (on)
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{
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USB_VBUS_PWR_ASSERT;
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if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_ENABLE;
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}
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else
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{
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if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_DISABLE;
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USB_VBUS_PWR_DEASSERT;
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}
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sleep(HZ/20); // > 50ms for detecting the enable state change
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}
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