1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/*
* QEMU Intel 82374 emulation (Enhanced DMA controller)
*
* Copyright (c) 2010 Hervé Poussineau
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/isa/isa.h"
#include "hw/dma/i8257.h"
#define TYPE_I82374 "i82374"
#define I82374(obj) OBJECT_CHECK(I82374State, (obj), TYPE_I82374)
//#define DEBUG_I82374
#ifdef DEBUG_I82374
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, "i82374: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
do {} while (0)
#endif
#define BADF(fmt, ...) \
do { fprintf(stderr, "i82374 ERROR: " fmt , ## __VA_ARGS__); } while (0)
typedef struct I82374State {
ISADevice parent_obj;
uint32_t iobase;
uint8_t commands[8];
PortioList port_list;
} I82374State;
static const VMStateDescription vmstate_i82374 = {
.name = "i82374",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY(commands, I82374State, 8),
VMSTATE_END_OF_LIST()
},
};
static uint32_t i82374_read_isr(void *opaque, uint32_t nport)
{
uint32_t val = 0;
BADF("%s: %08x\n", __func__, nport);
DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
return val;
}
static void i82374_write_command(void *opaque, uint32_t nport, uint32_t data)
{
DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
if (data != 0x42) {
/* Not Stop S/G command */
BADF("%s: %08x=%08x\n", __func__, nport, data);
}
}
static uint32_t i82374_read_status(void *opaque, uint32_t nport)
{
uint32_t val = 0;
BADF("%s: %08x\n", __func__, nport);
DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
return val;
}
static void i82374_write_descriptor(void *opaque, uint32_t nport, uint32_t data)
{
DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
BADF("%s: %08x=%08x\n", __func__, nport, data);
}
static uint32_t i82374_read_descriptor(void *opaque, uint32_t nport)
{
uint32_t val = 0;
BADF("%s: %08x\n", __func__, nport);
DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
return val;
}
static const MemoryRegionPortio i82374_portio_list[] = {
{ 0x0A, 1, 1, .read = i82374_read_isr, },
{ 0x10, 8, 1, .write = i82374_write_command, },
{ 0x18, 8, 1, .read = i82374_read_status, },
{ 0x20, 0x20, 1,
.write = i82374_write_descriptor, .read = i82374_read_descriptor, },
PORTIO_END_OF_LIST(),
};
static void i82374_realize(DeviceState *dev, Error **errp)
{
I82374State *s = I82374(dev);
ISABus *isa_bus = isa_bus_from_device(ISA_DEVICE(dev));
if (isa_get_dma(isa_bus, 0)) {
error_setg(errp, "DMA already initialized on ISA bus");
return;
}
i8257_dma_init(isa_bus, true);
portio_list_init(&s->port_list, OBJECT(s), i82374_portio_list, s,
"i82374");
portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj),
s->iobase);
memset(s->commands, 0, sizeof(s->commands));
}
static Property i82374_properties[] = {
DEFINE_PROP_UINT32("iobase", I82374State, iobase, 0x400),
DEFINE_PROP_END_OF_LIST()
};
static void i82374_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = i82374_realize;
dc->vmsd = &vmstate_i82374;
dc->props = i82374_properties;
}
static const TypeInfo i82374_info = {
.name = TYPE_I82374,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(I82374State),
.class_init = i82374_class_init,
};
static void i82374_register_types(void)
{
type_register_static(&i82374_info);
}
type_init(i82374_register_types)
|
