fad79dc636
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13110 a1c6a512-1295-4272-9138-f99709370657
58 lines
1.9 KiB
C
58 lines
1.9 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) 2007 by Jens Arnold
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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 "adc.h"
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#include "ata_mmc.h"
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#include "cpu.h"
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#include "hwcompat.h"
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#include "system.h"
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bool usb_detect(void)
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{
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return (adc_read(ADC_USB_POWER) <= 512) ? true : false;
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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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mmc_enable_int_flash_clock(!mmc_detect());
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if (!(read_hw_mask() & MMC_CLOCK_POLARITY))
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and_b(~0x20, &PBDRH); /* old circuit needs SCK1 = low while on USB */
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or_b(0x20, &PADRL); /* enable USB */
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and_b(~0x08, &PADRL); /* assert card detect */
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}
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else
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{
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if (!(read_hw_mask() & MMC_CLOCK_POLARITY))
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or_b(0x20, &PBDRH); /* reset SCK1 = high for old circuit */
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and_b(~0x20, &PADRL); /* disable USB */
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or_b(0x08, &PADRL); /* deassert card detect */
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}
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}
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void usb_init_device(void)
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{
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PACR2 &= ~0x04C0; /* use PA3 (card detect) and PA5 (USB enabled) as GPIO */
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and_b(~0x20, &PADRL); /* disable USB */
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or_b(0x08, &PADRL); /* deassert card detect */
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or_b(0x28, &PAIORL); /* output for USB enable and card detect */
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}
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