82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
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/***************************************************************************
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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) 2010 Marcin Bukat
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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 <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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#include "usb.h"
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void usb_init_device(void)
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{
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/* GPIO42 is USB detect input
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* but it also serves as MCLK2 for DAC
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*/
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and_l(~(1<<4), &GPIO1_OUT);
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or_l((1<<4)|(1<<18), &GPIO1_ENABLE); /* GPIO36 GPIO50 */
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or_l((1<<4)|(1<<18), &GPIO1_FUNCTION);
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/* GPIO22 GPIO30*/
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/* GPIO31 has to be low to ATA work */
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or_l((1<<22)|(1<<30), &GPIO_OUT);
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or_l((1<<22)|(1<<30)|(1<<31), &GPIO_ENABLE);
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or_l((1<<22)|(1<<30)|(1<<31), &GPIO_FUNCTION);
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}
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int usb_detect(void)
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{
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/* GPIO42 active low*/
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return (GPIO1_READ & (1<<10)) ? USB_EXTRACTED : USB_INSERTED;
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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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or_l((1<<18),&GPIO1_OUT); /* GPIO50 high */
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and_l(~(1<<30),&GPIO_OUT); /* GPIO30 low */
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/* GPIO36 low delay GPIO36 high delay */
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and_l(~(1<<4),&GPIO1_OUT);
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or_l((1<<4),&GPIO1_OUT);
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and_l(~(1<<18),&GPIO1_OUT); /* GPIO50 low */
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sleep(HZ/5); /* delay 200 ms */
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and_l(~(1<<22),&GPIO_OUT); /* GPIO22 low */
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}
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else
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{
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/* GPIO36 low delay GPIO36 high delay */
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and_l(~(1<<4),&GPIO1_OUT);
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sleep(HZ/100);
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or_l((1<<4),&GPIO1_OUT);
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sleep(HZ/100);
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or_l((1<<22),&GPIO_OUT); /* GPIO22 high */
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or_l((1<<30),&GPIO_OUT); /* GPIO30 high */
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and_l(~(1<<4),&GPIO1_OUT); /* GPIO36 low */
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//or_l((1<<18),&GPIO1_OUT); /* GPIO50 high */
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}
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}
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