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142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
/*
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* GPIO device simulation in PKUnity SoC
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*
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* Copyright (C) 2010-2012 Guan Xuetao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation, or any later version.
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* See the COPYING file in the top-level directory.
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*/
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#include "hw/hw.h"
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#include "hw/sysbus.h"
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#undef DEBUG_PUV3
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#include "hw/unicore32/puv3.h"
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typedef struct {
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SysBusDevice busdev;
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MemoryRegion iomem;
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qemu_irq irq[9];
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uint32_t reg_GPLR;
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uint32_t reg_GPDR;
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uint32_t reg_GPIR;
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} PUV3GPIOState;
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static uint64_t puv3_gpio_read(void *opaque, hwaddr offset,
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unsigned size)
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{
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PUV3GPIOState *s = opaque;
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uint32_t ret = 0;
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switch (offset) {
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case 0x00:
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ret = s->reg_GPLR;
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break;
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case 0x04:
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ret = s->reg_GPDR;
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break;
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case 0x20:
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ret = s->reg_GPIR;
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break;
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default:
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DPRINTF("Bad offset 0x%x\n", offset);
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}
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DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);
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return ret;
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}
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static void puv3_gpio_write(void *opaque, hwaddr offset,
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uint64_t value, unsigned size)
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{
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PUV3GPIOState *s = opaque;
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DPRINTF("offset 0x%x, value 0x%x\n", offset, value);
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switch (offset) {
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case 0x04:
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s->reg_GPDR = value;
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break;
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case 0x08:
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if (s->reg_GPDR & value) {
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s->reg_GPLR |= value;
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} else {
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DPRINTF("Write gpio input port error!");
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}
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break;
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case 0x0c:
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if (s->reg_GPDR & value) {
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s->reg_GPLR &= ~value;
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} else {
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DPRINTF("Write gpio input port error!");
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}
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break;
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case 0x10: /* GRER */
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case 0x14: /* GFER */
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case 0x18: /* GEDR */
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break;
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case 0x20: /* GPIR */
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s->reg_GPIR = value;
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break;
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default:
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DPRINTF("Bad offset 0x%x\n", offset);
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}
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}
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static const MemoryRegionOps puv3_gpio_ops = {
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.read = puv3_gpio_read,
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.write = puv3_gpio_write,
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.impl = {
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.min_access_size = 4,
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.max_access_size = 4,
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},
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static int puv3_gpio_init(SysBusDevice *dev)
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{
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PUV3GPIOState *s = FROM_SYSBUS(PUV3GPIOState, dev);
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s->reg_GPLR = 0;
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s->reg_GPDR = 0;
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/* FIXME: these irqs not handled yet */
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW0]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW1]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW2]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW3]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW4]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW5]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW6]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW7]);
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sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOHIGH]);
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memory_region_init_io(&s->iomem, OBJECT(s), &puv3_gpio_ops, s, "puv3_gpio",
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PUV3_REGS_OFFSET);
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sysbus_init_mmio(dev, &s->iomem);
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return 0;
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}
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static void puv3_gpio_class_init(ObjectClass *klass, void *data)
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{
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SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
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sdc->init = puv3_gpio_init;
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}
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static const TypeInfo puv3_gpio_info = {
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.name = "puv3_gpio",
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(PUV3GPIOState),
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.class_init = puv3_gpio_class_init,
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};
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static void puv3_gpio_register_type(void)
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{
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type_register_static(&puv3_gpio_info);
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}
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type_init(puv3_gpio_register_type)
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