]>
Commit | Line | Data |
---|---|---|
4af39611 PB |
1 | /* |
2 | * Syborg pointing device (mouse/touchscreen) | |
3 | * | |
4 | * Copyright (c) 2008 CodeSourcery | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include "sysbus.h" | |
26 | #include "console.h" | |
27 | #include "syborg.h" | |
28 | ||
29 | enum { | |
30 | POINTER_ID = 0, | |
31 | POINTER_LATCH = 1, | |
32 | POINTER_FIFO_COUNT = 2, | |
33 | POINTER_X = 3, | |
34 | POINTER_Y = 4, | |
35 | POINTER_Z = 5, | |
36 | POINTER_BUTTONS = 6, | |
37 | POINTER_INT_ENABLE = 7, | |
38 | POINTER_FIFO_SIZE = 8 | |
39 | }; | |
40 | ||
41 | typedef struct { | |
42 | int x, y, z, pointer_buttons; | |
43 | } event_data; | |
44 | ||
45 | typedef struct { | |
46 | SysBusDevice busdev; | |
9ca9e358 | 47 | MemoryRegion iomem; |
4af39611 | 48 | int int_enabled; |
ee6847d1 | 49 | uint32_t fifo_size; |
4af39611 PB |
50 | event_data *event_fifo; |
51 | int read_pos, read_count; | |
52 | qemu_irq irq; | |
ee6847d1 | 53 | uint32_t absolute; |
4af39611 PB |
54 | } SyborgPointerState; |
55 | ||
56 | static void syborg_pointer_update(SyborgPointerState *s) | |
57 | { | |
58 | qemu_set_irq(s->irq, s->read_count && s->int_enabled); | |
59 | } | |
60 | ||
9ca9e358 BC |
61 | static uint64_t syborg_pointer_read(void *opaque, target_phys_addr_t offset, |
62 | unsigned size) | |
4af39611 PB |
63 | { |
64 | SyborgPointerState *s = (SyborgPointerState *)opaque; | |
65 | ||
66 | offset &= 0xfff; | |
67 | switch (offset >> 2) { | |
68 | case POINTER_ID: | |
69 | return s->absolute ? SYBORG_ID_TOUCHSCREEN : SYBORG_ID_MOUSE; | |
70 | case POINTER_FIFO_COUNT: | |
71 | return s->read_count; | |
72 | case POINTER_X: | |
73 | return s->event_fifo[s->read_pos].x; | |
74 | case POINTER_Y: | |
75 | return s->event_fifo[s->read_pos].y; | |
76 | case POINTER_Z: | |
77 | return s->event_fifo[s->read_pos].z; | |
78 | case POINTER_BUTTONS: | |
79 | return s->event_fifo[s->read_pos].pointer_buttons; | |
80 | case POINTER_INT_ENABLE: | |
81 | return s->int_enabled; | |
82 | case POINTER_FIFO_SIZE: | |
83 | return s->fifo_size; | |
84 | default: | |
85 | cpu_abort(cpu_single_env, "syborg_pointer_read: Bad offset %x\n", | |
86 | (int)offset); | |
87 | return 0; | |
88 | } | |
89 | } | |
90 | ||
c227f099 | 91 | static void syborg_pointer_write(void *opaque, target_phys_addr_t offset, |
9ca9e358 | 92 | uint64_t value, unsigned size) |
4af39611 PB |
93 | { |
94 | SyborgPointerState *s = (SyborgPointerState *)opaque; | |
95 | ||
96 | offset &= 0xfff; | |
97 | switch (offset >> 2) { | |
98 | case POINTER_LATCH: | |
99 | if (s->read_count > 0) { | |
100 | s->read_count--; | |
101 | if (++s->read_pos == s->fifo_size) | |
102 | s->read_pos = 0; | |
103 | } | |
104 | break; | |
105 | case POINTER_INT_ENABLE: | |
106 | s->int_enabled = value; | |
107 | break; | |
108 | default: | |
109 | cpu_abort(cpu_single_env, "syborg_pointer_write: Bad offset %x\n", | |
110 | (int)offset); | |
111 | } | |
112 | syborg_pointer_update(s); | |
113 | } | |
114 | ||
9ca9e358 BC |
115 | static const MemoryRegionOps syborg_pointer_ops = { |
116 | .read = syborg_pointer_read, | |
117 | .write = syborg_pointer_write, | |
118 | .endianness = DEVICE_NATIVE_ENDIAN, | |
4af39611 PB |
119 | }; |
120 | ||
121 | static void syborg_pointer_event(void *opaque, int dx, int dy, int dz, | |
122 | int buttons_state) | |
123 | { | |
124 | SyborgPointerState *s = (SyborgPointerState *)opaque; | |
125 | int slot = s->read_pos + s->read_count; | |
126 | ||
127 | /* This first FIFO entry is used to store current register state. */ | |
128 | if (s->read_count < s->fifo_size - 1) { | |
129 | s->read_count++; | |
130 | slot++; | |
131 | } | |
132 | ||
133 | if (slot >= s->fifo_size) | |
134 | slot -= s->fifo_size; | |
135 | ||
136 | if (s->read_count == s->fifo_size && !s->absolute) { | |
137 | /* Merge existing entries. */ | |
138 | s->event_fifo[slot].x += dx; | |
139 | s->event_fifo[slot].y += dy; | |
140 | s->event_fifo[slot].z += dz; | |
141 | } else { | |
142 | s->event_fifo[slot].x = dx; | |
143 | s->event_fifo[slot].y = dy; | |
144 | s->event_fifo[slot].z = dz; | |
145 | } | |
146 | s->event_fifo[slot].pointer_buttons = buttons_state; | |
147 | ||
148 | syborg_pointer_update(s); | |
149 | } | |
150 | ||
80a52680 JQ |
151 | static const VMStateDescription vmstate_event_data = { |
152 | .name = "dbma_channel", | |
153 | .version_id = 0, | |
154 | .minimum_version_id = 0, | |
155 | .minimum_version_id_old = 0, | |
156 | .fields = (VMStateField[]) { | |
157 | VMSTATE_INT32(x, event_data), | |
158 | VMSTATE_INT32(y, event_data), | |
159 | VMSTATE_INT32(z, event_data), | |
160 | VMSTATE_INT32(pointer_buttons, event_data), | |
161 | VMSTATE_END_OF_LIST() | |
4af39611 | 162 | } |
80a52680 | 163 | }; |
4af39611 | 164 | |
80a52680 JQ |
165 | static const VMStateDescription vmstate_syborg_pointer = { |
166 | .name = "syborg_pointer", | |
167 | .version_id = 1, | |
168 | .minimum_version_id = 1, | |
169 | .minimum_version_id_old = 1, | |
170 | .fields = (VMStateField[]) { | |
171 | VMSTATE_UINT32_EQUAL(fifo_size, SyborgPointerState), | |
172 | VMSTATE_UINT32_EQUAL(absolute, SyborgPointerState), | |
173 | VMSTATE_INT32(int_enabled, SyborgPointerState), | |
174 | VMSTATE_INT32(read_pos, SyborgPointerState), | |
175 | VMSTATE_INT32(read_count, SyborgPointerState), | |
176 | VMSTATE_STRUCT_VARRAY_UINT32(event_fifo, SyborgPointerState, fifo_size, | |
177 | 1, vmstate_event_data, event_data), | |
178 | VMSTATE_END_OF_LIST() | |
4af39611 | 179 | } |
80a52680 | 180 | }; |
4af39611 | 181 | |
81a322d4 | 182 | static int syborg_pointer_init(SysBusDevice *dev) |
4af39611 PB |
183 | { |
184 | SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev); | |
4af39611 PB |
185 | |
186 | sysbus_init_irq(dev, &s->irq); | |
9ca9e358 BC |
187 | memory_region_init_io(&s->iomem, &syborg_pointer_ops, s, |
188 | "pointer", 0x1000); | |
750ecd44 | 189 | sysbus_init_mmio(dev, &s->iomem); |
4af39611 | 190 | |
4af39611 PB |
191 | if (s->fifo_size <= 0) { |
192 | fprintf(stderr, "syborg_pointer: fifo too small\n"); | |
193 | s->fifo_size = 16; | |
194 | } | |
7267c094 | 195 | s->event_fifo = g_malloc0(s->fifo_size * sizeof(s->event_fifo[0])); |
4af39611 PB |
196 | |
197 | qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute, | |
198 | "Syborg Pointer"); | |
199 | ||
80a52680 | 200 | vmstate_register(&dev->qdev, -1, &vmstate_syborg_pointer, s); |
81a322d4 | 201 | return 0; |
4af39611 PB |
202 | } |
203 | ||
ee6847d1 GH |
204 | static SysBusDeviceInfo syborg_pointer_info = { |
205 | .init = syborg_pointer_init, | |
206 | .qdev.name = "syborg,pointer", | |
207 | .qdev.size = sizeof(SyborgPointerState), | |
208 | .qdev.props = (Property[]) { | |
5cdabc14 GH |
209 | DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16), |
210 | DEFINE_PROP_UINT32("absolute", SyborgPointerState, absolute, 1), | |
211 | DEFINE_PROP_END_OF_LIST(), | |
ee6847d1 GH |
212 | } |
213 | }; | |
214 | ||
4af39611 PB |
215 | static void syborg_pointer_register_devices(void) |
216 | { | |
ee6847d1 | 217 | sysbus_register_withprop(&syborg_pointer_info); |
4af39611 PB |
218 | } |
219 | ||
220 | device_init(syborg_pointer_register_devices) |