295367686e
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11850 a1c6a512-1295-4272-9138-f99709370657
91 lines
2.2 KiB
C
91 lines
2.2 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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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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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 <stdbool.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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#define USB_RST_ASSERT GPBDAT &= ~(1 << 4)
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#define USB_RST_DEASSERT GPBDAT |= (1 << 4)
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#define USB_ATA_ENABLE GPBDAT |= (1 << 5)
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#define USB_ATA_DISABLE GPBDAT &= ~(1 << 5)
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#define USB_VPLUS_PWR_ASSERT GPBDAT |= (1 << 6)
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#define USB_VPLUS_PWR_DEASSERT GPBDAT &= ~(1 << 6)
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#define USB_IS_PRESENT (!(GPFDAT & 1))
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/* The usb detect is one pin to the cpu active low */
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inline bool usb_detect(void)
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{
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return USB_IS_PRESENT;
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}
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void usb_init_device(void)
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{
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USB_VPLUS_PWR_ASSERT;
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sleep(HZ/20);
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/* Reset the usb port */
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/* Make sure the cpu pin for reset line is set to output */
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GPBCON = (GPBCON & ~0x300) | 0x100;
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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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USB_ATA_ENABLE;
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sleep(HZ/15); /* 66ms */
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USB_ATA_DISABLE;
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sleep(HZ/25);
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/* leave chip in low power mode */
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USB_VPLUS_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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/* make sure ata_en is high */
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USB_VPLUS_PWR_ASSERT;
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USB_ATA_ENABLE;
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}
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else
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{
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/* make sure ata_en is low */
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USB_ATA_DISABLE;
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USB_VPLUS_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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