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11#include "qemu/osdep.h"
12#include "hw/hw.h"
13#include "hw/sysbus.h"
14
15#undef DEBUG_PUV3
16#include "hw/unicore32/puv3.h"
17
18#define TYPE_PUV3_GPIO "puv3_gpio"
19#define PUV3_GPIO(obj) OBJECT_CHECK(PUV3GPIOState, (obj), TYPE_PUV3_GPIO)
20
21typedef struct PUV3GPIOState {
22 SysBusDevice parent_obj;
23
24 MemoryRegion iomem;
25 qemu_irq irq[9];
26
27 uint32_t reg_GPLR;
28 uint32_t reg_GPDR;
29 uint32_t reg_GPIR;
30} PUV3GPIOState;
31
32static uint64_t puv3_gpio_read(void *opaque, hwaddr offset,
33 unsigned size)
34{
35 PUV3GPIOState *s = opaque;
36 uint32_t ret = 0;
37
38 switch (offset) {
39 case 0x00:
40 ret = s->reg_GPLR;
41 break;
42 case 0x04:
43 ret = s->reg_GPDR;
44 break;
45 case 0x20:
46 ret = s->reg_GPIR;
47 break;
48 default:
49 DPRINTF("Bad offset 0x%x\n", offset);
50 }
51 DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);
52
53 return ret;
54}
55
56static void puv3_gpio_write(void *opaque, hwaddr offset,
57 uint64_t value, unsigned size)
58{
59 PUV3GPIOState *s = opaque;
60
61 DPRINTF("offset 0x%x, value 0x%x\n", offset, value);
62 switch (offset) {
63 case 0x04:
64 s->reg_GPDR = value;
65 break;
66 case 0x08:
67 if (s->reg_GPDR & value) {
68 s->reg_GPLR |= value;
69 } else {
70 DPRINTF("Write gpio input port error!");
71 }
72 break;
73 case 0x0c:
74 if (s->reg_GPDR & value) {
75 s->reg_GPLR &= ~value;
76 } else {
77 DPRINTF("Write gpio input port error!");
78 }
79 break;
80 case 0x10:
81 case 0x14:
82 case 0x18:
83 break;
84 case 0x20:
85 s->reg_GPIR = value;
86 break;
87 default:
88 DPRINTF("Bad offset 0x%x\n", offset);
89 }
90}
91
92static const MemoryRegionOps puv3_gpio_ops = {
93 .read = puv3_gpio_read,
94 .write = puv3_gpio_write,
95 .impl = {
96 .min_access_size = 4,
97 .max_access_size = 4,
98 },
99 .endianness = DEVICE_NATIVE_ENDIAN,
100};
101
102static int puv3_gpio_init(SysBusDevice *dev)
103{
104 PUV3GPIOState *s = PUV3_GPIO(dev);
105
106 s->reg_GPLR = 0;
107 s->reg_GPDR = 0;
108
109
110 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW0]);
111 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW1]);
112 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW2]);
113 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW3]);
114 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW4]);
115 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW5]);
116 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW6]);
117 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOLOW7]);
118 sysbus_init_irq(dev, &s->irq[PUV3_IRQS_GPIOHIGH]);
119
120 memory_region_init_io(&s->iomem, OBJECT(s), &puv3_gpio_ops, s, "puv3_gpio",
121 PUV3_REGS_OFFSET);
122 sysbus_init_mmio(dev, &s->iomem);
123
124 return 0;
125}
126
127static void puv3_gpio_class_init(ObjectClass *klass, void *data)
128{
129 SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
130
131 sdc->init = puv3_gpio_init;
132}
133
134static const TypeInfo puv3_gpio_info = {
135 .name = TYPE_PUV3_GPIO,
136 .parent = TYPE_SYS_BUS_DEVICE,
137 .instance_size = sizeof(PUV3GPIOState),
138 .class_init = puv3_gpio_class_init,
139};
140
141static void puv3_gpio_register_type(void)
142{
143 type_register_static(&puv3_gpio_info);
144}
145
146type_init(puv3_gpio_register_type)
147