root / hw / syborg_pointer.c @ cde844fa
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1 | 4af39611 | Paul Brook | /*
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2 | 4af39611 | Paul Brook | * Syborg pointing device (mouse/touchscreen)
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3 | 4af39611 | Paul Brook | *
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4 | 4af39611 | Paul Brook | * Copyright (c) 2008 CodeSourcery
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5 | 4af39611 | Paul Brook | *
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6 | 4af39611 | Paul Brook | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 4af39611 | Paul Brook | * of this software and associated documentation files (the "Software"), to deal
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8 | 4af39611 | Paul Brook | * in the Software without restriction, including without limitation the rights
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9 | 4af39611 | Paul Brook | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 4af39611 | Paul Brook | * copies of the Software, and to permit persons to whom the Software is
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11 | 4af39611 | Paul Brook | * furnished to do so, subject to the following conditions:
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12 | 4af39611 | Paul Brook | *
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13 | 4af39611 | Paul Brook | * The above copyright notice and this permission notice shall be included in
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14 | 4af39611 | Paul Brook | * all copies or substantial portions of the Software.
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15 | 4af39611 | Paul Brook | *
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16 | 4af39611 | Paul Brook | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 4af39611 | Paul Brook | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 4af39611 | Paul Brook | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 4af39611 | Paul Brook | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 4af39611 | Paul Brook | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 4af39611 | Paul Brook | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 4af39611 | Paul Brook | * THE SOFTWARE.
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23 | 4af39611 | Paul Brook | */
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24 | 4af39611 | Paul Brook | |
25 | 4af39611 | Paul Brook | #include "sysbus.h" |
26 | 4af39611 | Paul Brook | #include "console.h" |
27 | 4af39611 | Paul Brook | #include "syborg.h" |
28 | 4af39611 | Paul Brook | |
29 | 4af39611 | Paul Brook | enum {
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30 | 4af39611 | Paul Brook | POINTER_ID = 0,
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31 | 4af39611 | Paul Brook | POINTER_LATCH = 1,
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32 | 4af39611 | Paul Brook | POINTER_FIFO_COUNT = 2,
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33 | 4af39611 | Paul Brook | POINTER_X = 3,
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34 | 4af39611 | Paul Brook | POINTER_Y = 4,
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35 | 4af39611 | Paul Brook | POINTER_Z = 5,
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36 | 4af39611 | Paul Brook | POINTER_BUTTONS = 6,
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37 | 4af39611 | Paul Brook | POINTER_INT_ENABLE = 7,
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38 | 4af39611 | Paul Brook | POINTER_FIFO_SIZE = 8
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39 | 4af39611 | Paul Brook | }; |
40 | 4af39611 | Paul Brook | |
41 | 4af39611 | Paul Brook | typedef struct { |
42 | 4af39611 | Paul Brook | int x, y, z, pointer_buttons;
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43 | 4af39611 | Paul Brook | } event_data; |
44 | 4af39611 | Paul Brook | |
45 | 4af39611 | Paul Brook | typedef struct { |
46 | 4af39611 | Paul Brook | SysBusDevice busdev; |
47 | 9ca9e358 | Benoît Canet | MemoryRegion iomem; |
48 | 4af39611 | Paul Brook | int int_enabled;
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49 | ee6847d1 | Gerd Hoffmann | uint32_t fifo_size; |
50 | 4af39611 | Paul Brook | event_data *event_fifo; |
51 | 4af39611 | Paul Brook | int read_pos, read_count;
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52 | 4af39611 | Paul Brook | qemu_irq irq; |
53 | ee6847d1 | Gerd Hoffmann | uint32_t absolute; |
54 | 4af39611 | Paul Brook | } SyborgPointerState; |
55 | 4af39611 | Paul Brook | |
56 | 4af39611 | Paul Brook | static void syborg_pointer_update(SyborgPointerState *s) |
57 | 4af39611 | Paul Brook | { |
58 | 4af39611 | Paul Brook | qemu_set_irq(s->irq, s->read_count && s->int_enabled); |
59 | 4af39611 | Paul Brook | } |
60 | 4af39611 | Paul Brook | |
61 | 9ca9e358 | Benoît Canet | static uint64_t syborg_pointer_read(void *opaque, target_phys_addr_t offset, |
62 | 9ca9e358 | Benoît Canet | unsigned size)
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63 | 4af39611 | Paul Brook | { |
64 | 4af39611 | Paul Brook | SyborgPointerState *s = (SyborgPointerState *)opaque; |
65 | 4af39611 | Paul Brook | |
66 | 4af39611 | Paul Brook | offset &= 0xfff;
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67 | 4af39611 | Paul Brook | switch (offset >> 2) { |
68 | 4af39611 | Paul Brook | case POINTER_ID:
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69 | 4af39611 | Paul Brook | return s->absolute ? SYBORG_ID_TOUCHSCREEN : SYBORG_ID_MOUSE;
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70 | 4af39611 | Paul Brook | case POINTER_FIFO_COUNT:
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71 | 4af39611 | Paul Brook | return s->read_count;
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72 | 4af39611 | Paul Brook | case POINTER_X:
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73 | 4af39611 | Paul Brook | return s->event_fifo[s->read_pos].x;
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74 | 4af39611 | Paul Brook | case POINTER_Y:
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75 | 4af39611 | Paul Brook | return s->event_fifo[s->read_pos].y;
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76 | 4af39611 | Paul Brook | case POINTER_Z:
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77 | 4af39611 | Paul Brook | return s->event_fifo[s->read_pos].z;
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78 | 4af39611 | Paul Brook | case POINTER_BUTTONS:
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79 | 4af39611 | Paul Brook | return s->event_fifo[s->read_pos].pointer_buttons;
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80 | 4af39611 | Paul Brook | case POINTER_INT_ENABLE:
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81 | 4af39611 | Paul Brook | return s->int_enabled;
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82 | 4af39611 | Paul Brook | case POINTER_FIFO_SIZE:
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83 | 4af39611 | Paul Brook | return s->fifo_size;
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84 | 4af39611 | Paul Brook | default:
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85 | 4af39611 | Paul Brook | cpu_abort(cpu_single_env, "syborg_pointer_read: Bad offset %x\n",
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86 | 4af39611 | Paul Brook | (int)offset);
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87 | 4af39611 | Paul Brook | return 0; |
88 | 4af39611 | Paul Brook | } |
89 | 4af39611 | Paul Brook | } |
90 | 4af39611 | Paul Brook | |
91 | c227f099 | Anthony Liguori | static void syborg_pointer_write(void *opaque, target_phys_addr_t offset, |
92 | 9ca9e358 | Benoît Canet | uint64_t value, unsigned size)
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93 | 4af39611 | Paul Brook | { |
94 | 4af39611 | Paul Brook | SyborgPointerState *s = (SyborgPointerState *)opaque; |
95 | 4af39611 | Paul Brook | |
96 | 4af39611 | Paul Brook | offset &= 0xfff;
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97 | 4af39611 | Paul Brook | switch (offset >> 2) { |
98 | 4af39611 | Paul Brook | case POINTER_LATCH:
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99 | 4af39611 | Paul Brook | if (s->read_count > 0) { |
100 | 4af39611 | Paul Brook | s->read_count--; |
101 | 4af39611 | Paul Brook | if (++s->read_pos == s->fifo_size)
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102 | 4af39611 | Paul Brook | s->read_pos = 0;
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103 | 4af39611 | Paul Brook | } |
104 | 4af39611 | Paul Brook | break;
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105 | 4af39611 | Paul Brook | case POINTER_INT_ENABLE:
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106 | 4af39611 | Paul Brook | s->int_enabled = value; |
107 | 4af39611 | Paul Brook | break;
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108 | 4af39611 | Paul Brook | default:
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109 | 4af39611 | Paul Brook | cpu_abort(cpu_single_env, "syborg_pointer_write: Bad offset %x\n",
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110 | 4af39611 | Paul Brook | (int)offset);
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111 | 4af39611 | Paul Brook | } |
112 | 4af39611 | Paul Brook | syborg_pointer_update(s); |
113 | 4af39611 | Paul Brook | } |
114 | 4af39611 | Paul Brook | |
115 | 9ca9e358 | Benoît Canet | static const MemoryRegionOps syborg_pointer_ops = { |
116 | 9ca9e358 | Benoît Canet | .read = syborg_pointer_read, |
117 | 9ca9e358 | Benoît Canet | .write = syborg_pointer_write, |
118 | 9ca9e358 | Benoît Canet | .endianness = DEVICE_NATIVE_ENDIAN, |
119 | 4af39611 | Paul Brook | }; |
120 | 4af39611 | Paul Brook | |
121 | 4af39611 | Paul Brook | static void syborg_pointer_event(void *opaque, int dx, int dy, int dz, |
122 | 4af39611 | Paul Brook | int buttons_state)
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123 | 4af39611 | Paul Brook | { |
124 | 4af39611 | Paul Brook | SyborgPointerState *s = (SyborgPointerState *)opaque; |
125 | 4af39611 | Paul Brook | int slot = s->read_pos + s->read_count;
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126 | 4af39611 | Paul Brook | |
127 | 4af39611 | Paul Brook | /* This first FIFO entry is used to store current register state. */
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128 | 4af39611 | Paul Brook | if (s->read_count < s->fifo_size - 1) { |
129 | 4af39611 | Paul Brook | s->read_count++; |
130 | 4af39611 | Paul Brook | slot++; |
131 | 4af39611 | Paul Brook | } |
132 | 4af39611 | Paul Brook | |
133 | 4af39611 | Paul Brook | if (slot >= s->fifo_size)
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134 | 4af39611 | Paul Brook | slot -= s->fifo_size; |
135 | 4af39611 | Paul Brook | |
136 | 4af39611 | Paul Brook | if (s->read_count == s->fifo_size && !s->absolute) {
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137 | 4af39611 | Paul Brook | /* Merge existing entries. */
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138 | 4af39611 | Paul Brook | s->event_fifo[slot].x += dx; |
139 | 4af39611 | Paul Brook | s->event_fifo[slot].y += dy; |
140 | 4af39611 | Paul Brook | s->event_fifo[slot].z += dz; |
141 | 4af39611 | Paul Brook | } else {
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142 | 4af39611 | Paul Brook | s->event_fifo[slot].x = dx; |
143 | 4af39611 | Paul Brook | s->event_fifo[slot].y = dy; |
144 | 4af39611 | Paul Brook | s->event_fifo[slot].z = dz; |
145 | 4af39611 | Paul Brook | } |
146 | 4af39611 | Paul Brook | s->event_fifo[slot].pointer_buttons = buttons_state; |
147 | 4af39611 | Paul Brook | |
148 | 4af39611 | Paul Brook | syborg_pointer_update(s); |
149 | 4af39611 | Paul Brook | } |
150 | 4af39611 | Paul Brook | |
151 | 80a52680 | Juan Quintela | static const VMStateDescription vmstate_event_data = { |
152 | 80a52680 | Juan Quintela | .name = "dbma_channel",
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153 | 80a52680 | Juan Quintela | .version_id = 0,
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154 | 80a52680 | Juan Quintela | .minimum_version_id = 0,
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155 | 80a52680 | Juan Quintela | .minimum_version_id_old = 0,
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156 | 80a52680 | Juan Quintela | .fields = (VMStateField[]) { |
157 | 80a52680 | Juan Quintela | VMSTATE_INT32(x, event_data), |
158 | 80a52680 | Juan Quintela | VMSTATE_INT32(y, event_data), |
159 | 80a52680 | Juan Quintela | VMSTATE_INT32(z, event_data), |
160 | 80a52680 | Juan Quintela | VMSTATE_INT32(pointer_buttons, event_data), |
161 | 80a52680 | Juan Quintela | VMSTATE_END_OF_LIST() |
162 | 4af39611 | Paul Brook | } |
163 | 80a52680 | Juan Quintela | }; |
164 | 4af39611 | Paul Brook | |
165 | 80a52680 | Juan Quintela | static const VMStateDescription vmstate_syborg_pointer = { |
166 | 80a52680 | Juan Quintela | .name = "syborg_pointer",
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167 | 80a52680 | Juan Quintela | .version_id = 1,
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168 | 80a52680 | Juan Quintela | .minimum_version_id = 1,
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169 | 80a52680 | Juan Quintela | .minimum_version_id_old = 1,
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170 | 80a52680 | Juan Quintela | .fields = (VMStateField[]) { |
171 | 80a52680 | Juan Quintela | VMSTATE_UINT32_EQUAL(fifo_size, SyborgPointerState), |
172 | 80a52680 | Juan Quintela | VMSTATE_UINT32_EQUAL(absolute, SyborgPointerState), |
173 | 80a52680 | Juan Quintela | VMSTATE_INT32(int_enabled, SyborgPointerState), |
174 | 80a52680 | Juan Quintela | VMSTATE_INT32(read_pos, SyborgPointerState), |
175 | 80a52680 | Juan Quintela | VMSTATE_INT32(read_count, SyborgPointerState), |
176 | 80a52680 | Juan Quintela | VMSTATE_STRUCT_VARRAY_UINT32(event_fifo, SyborgPointerState, fifo_size, |
177 | 80a52680 | Juan Quintela | 1, vmstate_event_data, event_data),
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178 | 80a52680 | Juan Quintela | VMSTATE_END_OF_LIST() |
179 | 4af39611 | Paul Brook | } |
180 | 80a52680 | Juan Quintela | }; |
181 | 4af39611 | Paul Brook | |
182 | 81a322d4 | Gerd Hoffmann | static int syborg_pointer_init(SysBusDevice *dev) |
183 | 4af39611 | Paul Brook | { |
184 | 4af39611 | Paul Brook | SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev); |
185 | 4af39611 | Paul Brook | |
186 | 4af39611 | Paul Brook | sysbus_init_irq(dev, &s->irq); |
187 | 9ca9e358 | Benoît Canet | memory_region_init_io(&s->iomem, &syborg_pointer_ops, s, |
188 | 9ca9e358 | Benoît Canet | "pointer", 0x1000); |
189 | 9ca9e358 | Benoît Canet | sysbus_init_mmio_region(dev, &s->iomem); |
190 | 4af39611 | Paul Brook | |
191 | 4af39611 | Paul Brook | if (s->fifo_size <= 0) { |
192 | 4af39611 | Paul Brook | fprintf(stderr, "syborg_pointer: fifo too small\n");
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193 | 4af39611 | Paul Brook | s->fifo_size = 16;
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194 | 4af39611 | Paul Brook | } |
195 | 7267c094 | Anthony Liguori | s->event_fifo = g_malloc0(s->fifo_size * sizeof(s->event_fifo[0])); |
196 | 4af39611 | Paul Brook | |
197 | 4af39611 | Paul Brook | qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute, |
198 | 4af39611 | Paul Brook | "Syborg Pointer");
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199 | 4af39611 | Paul Brook | |
200 | 80a52680 | Juan Quintela | vmstate_register(&dev->qdev, -1, &vmstate_syborg_pointer, s);
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201 | 81a322d4 | Gerd Hoffmann | return 0; |
202 | 4af39611 | Paul Brook | } |
203 | 4af39611 | Paul Brook | |
204 | ee6847d1 | Gerd Hoffmann | static SysBusDeviceInfo syborg_pointer_info = {
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205 | ee6847d1 | Gerd Hoffmann | .init = syborg_pointer_init, |
206 | ee6847d1 | Gerd Hoffmann | .qdev.name = "syborg,pointer",
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207 | ee6847d1 | Gerd Hoffmann | .qdev.size = sizeof(SyborgPointerState),
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208 | ee6847d1 | Gerd Hoffmann | .qdev.props = (Property[]) { |
209 | 5cdabc14 | Gerd Hoffmann | DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16), |
210 | 5cdabc14 | Gerd Hoffmann | DEFINE_PROP_UINT32("absolute", SyborgPointerState, absolute, 1), |
211 | 5cdabc14 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
212 | ee6847d1 | Gerd Hoffmann | } |
213 | ee6847d1 | Gerd Hoffmann | }; |
214 | ee6847d1 | Gerd Hoffmann | |
215 | 4af39611 | Paul Brook | static void syborg_pointer_register_devices(void) |
216 | 4af39611 | Paul Brook | { |
217 | ee6847d1 | Gerd Hoffmann | sysbus_register_withprop(&syborg_pointer_info); |
218 | 4af39611 | Paul Brook | } |
219 | 4af39611 | Paul Brook | |
220 | 4af39611 | Paul Brook | device_init(syborg_pointer_register_devices) |