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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* Syborg pointing device (mouse/touchscreen)
*
* Copyright (c) 2008 CodeSourcery
*
* 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 "sysbus.h"
#include "console.h"
#include "syborg.h"
enum {
POINTER_ID = 0,
POINTER_LATCH = 1,
POINTER_FIFO_COUNT = 2,
POINTER_X = 3,
POINTER_Y = 4,
POINTER_Z = 5,
POINTER_BUTTONS = 6,
POINTER_INT_ENABLE = 7,
POINTER_FIFO_SIZE = 8
};
typedef struct {
int x, y, z, pointer_buttons;
} event_data;
typedef struct {
SysBusDevice busdev;
MemoryRegion iomem;
int int_enabled;
uint32_t fifo_size;
event_data *event_fifo;
int read_pos, read_count;
qemu_irq irq;
uint32_t absolute;
} SyborgPointerState;
static void syborg_pointer_update(SyborgPointerState *s)
{
qemu_set_irq(s->irq, s->read_count && s->int_enabled);
}
static uint64_t syborg_pointer_read(void *opaque, target_phys_addr_t offset,
unsigned size)
{
SyborgPointerState *s = (SyborgPointerState *)opaque;
offset &= 0xfff;
switch (offset >> 2) {
case POINTER_ID:
return s->absolute ? SYBORG_ID_TOUCHSCREEN : SYBORG_ID_MOUSE;
case POINTER_FIFO_COUNT:
return s->read_count;
case POINTER_X:
return s->event_fifo[s->read_pos].x;
case POINTER_Y:
return s->event_fifo[s->read_pos].y;
case POINTER_Z:
return s->event_fifo[s->read_pos].z;
case POINTER_BUTTONS:
return s->event_fifo[s->read_pos].pointer_buttons;
case POINTER_INT_ENABLE:
return s->int_enabled;
case POINTER_FIFO_SIZE:
return s->fifo_size;
default:
cpu_abort(cpu_single_env, "syborg_pointer_read: Bad offset %x\n",
(int)offset);
return 0;
}
}
static void syborg_pointer_write(void *opaque, target_phys_addr_t offset,
uint64_t value, unsigned size)
{
SyborgPointerState *s = (SyborgPointerState *)opaque;
offset &= 0xfff;
switch (offset >> 2) {
case POINTER_LATCH:
if (s->read_count > 0) {
s->read_count--;
if (++s->read_pos == s->fifo_size)
s->read_pos = 0;
}
break;
case POINTER_INT_ENABLE:
s->int_enabled = value;
break;
default:
cpu_abort(cpu_single_env, "syborg_pointer_write: Bad offset %x\n",
(int)offset);
}
syborg_pointer_update(s);
}
static const MemoryRegionOps syborg_pointer_ops = {
.read = syborg_pointer_read,
.write = syborg_pointer_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void syborg_pointer_event(void *opaque, int dx, int dy, int dz,
int buttons_state)
{
SyborgPointerState *s = (SyborgPointerState *)opaque;
int slot = s->read_pos + s->read_count;
/* This first FIFO entry is used to store current register state. */
if (s->read_count < s->fifo_size - 1) {
s->read_count++;
slot++;
}
if (slot >= s->fifo_size)
slot -= s->fifo_size;
if (s->read_count == s->fifo_size && !s->absolute) {
/* Merge existing entries. */
s->event_fifo[slot].x += dx;
s->event_fifo[slot].y += dy;
s->event_fifo[slot].z += dz;
} else {
s->event_fifo[slot].x = dx;
s->event_fifo[slot].y = dy;
s->event_fifo[slot].z = dz;
}
s->event_fifo[slot].pointer_buttons = buttons_state;
syborg_pointer_update(s);
}
static const VMStateDescription vmstate_event_data = {
.name = "dbma_channel",
.version_id = 0,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField[]) {
VMSTATE_INT32(x, event_data),
VMSTATE_INT32(y, event_data),
VMSTATE_INT32(z, event_data),
VMSTATE_INT32(pointer_buttons, event_data),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_syborg_pointer = {
.name = "syborg_pointer",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_EQUAL(fifo_size, SyborgPointerState),
VMSTATE_UINT32_EQUAL(absolute, SyborgPointerState),
VMSTATE_INT32(int_enabled, SyborgPointerState),
VMSTATE_INT32(read_pos, SyborgPointerState),
VMSTATE_INT32(read_count, SyborgPointerState),
VMSTATE_STRUCT_VARRAY_UINT32(event_fifo, SyborgPointerState, fifo_size,
1, vmstate_event_data, event_data),
VMSTATE_END_OF_LIST()
}
};
static int syborg_pointer_init(SysBusDevice *dev)
{
SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev);
sysbus_init_irq(dev, &s->irq);
memory_region_init_io(&s->iomem, &syborg_pointer_ops, s,
"pointer", 0x1000);
sysbus_init_mmio(dev, &s->iomem);
if (s->fifo_size <= 0) {
fprintf(stderr, "syborg_pointer: fifo too small\n");
s->fifo_size = 16;
}
s->event_fifo = g_malloc0(s->fifo_size * sizeof(s->event_fifo[0]));
qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute,
"Syborg Pointer");
vmstate_register(&dev->qdev, -1, &vmstate_syborg_pointer, s);
return 0;
}
static SysBusDeviceInfo syborg_pointer_info = {
.init = syborg_pointer_init,
.qdev.name = "syborg,pointer",
.qdev.size = sizeof(SyborgPointerState),
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16),
DEFINE_PROP_UINT32("absolute", SyborgPointerState, absolute, 1),
DEFINE_PROP_END_OF_LIST(),
}
};
static void syborg_pointer_register_devices(void)
{
sysbus_register_withprop(&syborg_pointer_info);
}
device_init(syborg_pointer_register_devices)
|
