85 lines
2.6 KiB
C
85 lines
2.6 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) 2021 Aidan MacDonald
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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 "gpio-x1000.h"
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#include "kernel.h"
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#ifndef BOOTLOADER_SPL
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struct mutex gpio_z_mutex;
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#endif
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void gpio_init(void)
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{
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#ifndef BOOTLOADER_SPL
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mutex_init(&gpio_z_mutex);
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#endif
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/* Set all pins to input state */
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for(int i = 0; i < 4; ++i) {
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jz_clr(GPIO_INT(GPIO_Z), 0xffffffff);
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jz_set(GPIO_MSK(GPIO_Z), 0xffffffff);
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jz_set(GPIO_PAT1(GPIO_Z), 0xffffffff);
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jz_clr(GPIO_PAT0(GPIO_Z), 0xffffffff);
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REG_GPIO_Z_GID2LD = i;
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}
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/* Clear flag and disable pull resistor */
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for(int i = 0; i < 4; ++i) {
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jz_clr(GPIO_FLAG(i), 0xffffffff);
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jz_set(GPIO_PULL(i), 0xffffffff);
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}
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}
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void gpio_lock(void)
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{
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#ifndef BOOTLOADER_SPL
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mutex_lock(&gpio_z_mutex);
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#endif
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}
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void gpio_unlock(void)
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{
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#ifndef BOOTLOADER_SPL
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mutex_unlock(&gpio_z_mutex);
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#endif
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}
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void gpio_config(int port, unsigned pinmask, int func)
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{
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unsigned intr = REG_GPIO_INT(port);
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unsigned mask = REG_GPIO_MSK(port);
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unsigned pat1 = REG_GPIO_PAT1(port);
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unsigned pat0 = REG_GPIO_PAT0(port);
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gpio_lock();
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if(func & 8) jz_set(GPIO_INT(GPIO_Z), (intr & pinmask) ^ pinmask);
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else jz_clr(GPIO_INT(GPIO_Z), (~intr & pinmask) ^ pinmask);
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if(func & 4) jz_set(GPIO_MSK(GPIO_Z), (mask & pinmask) ^ pinmask);
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else jz_clr(GPIO_MSK(GPIO_Z), (~mask & pinmask) ^ pinmask);
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if(func & 2) jz_set(GPIO_PAT1(GPIO_Z), (pat1 & pinmask) ^ pinmask);
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else jz_clr(GPIO_PAT1(GPIO_Z), (~pat1 & pinmask) ^ pinmask);
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if(func & 1) jz_set(GPIO_PAT0(GPIO_Z), (pat0 & pinmask) ^ pinmask);
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else jz_clr(GPIO_PAT0(GPIO_Z), (~pat0 & pinmask) ^ pinmask);
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REG_GPIO_Z_GID2LD = port;
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gpio_unlock();
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gpio_set_pull(port, pinmask, func & 16);
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}
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