root / hw / input / pl050.c @ a8aec295
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1 | 5fafdf24 | ths | /*
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2 | 69db0ac7 | pbrook | * Arm PrimeCell PL050 Keyboard / Mouse Interface
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3 | cdbdb648 | pbrook | *
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4 | 9e61ec31 | pbrook | * Copyright (c) 2006-2007 CodeSourcery.
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5 | cdbdb648 | pbrook | * Written by Paul Brook
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6 | cdbdb648 | pbrook | *
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7 | 8e31bf38 | Matthew Fernandez | * This code is licensed under the GPL.
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8 | cdbdb648 | pbrook | */
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9 | cdbdb648 | pbrook | |
10 | 83c9f4ca | Paolo Bonzini | #include "hw/sysbus.h" |
11 | 0d09e41a | Paolo Bonzini | #include "hw/input/ps2.h" |
12 | cdbdb648 | pbrook | |
13 | cdbdb648 | pbrook | typedef struct { |
14 | 86394e96 | Paul Brook | SysBusDevice busdev; |
15 | b8f7a738 | Avi Kivity | MemoryRegion iomem; |
16 | cdbdb648 | pbrook | void *dev;
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17 | cdbdb648 | pbrook | uint32_t cr; |
18 | cdbdb648 | pbrook | uint32_t clk; |
19 | cdbdb648 | pbrook | uint32_t last; |
20 | cdbdb648 | pbrook | int pending;
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21 | d537cf6c | pbrook | qemu_irq irq; |
22 | cdbdb648 | pbrook | int is_mouse;
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23 | cdbdb648 | pbrook | } pl050_state; |
24 | cdbdb648 | pbrook | |
25 | d6ac172a | Peter Maydell | static const VMStateDescription vmstate_pl050 = { |
26 | d6ac172a | Peter Maydell | .name = "pl050",
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27 | e8945b4f | Peter Maydell | .version_id = 2,
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28 | e8945b4f | Peter Maydell | .minimum_version_id = 2,
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29 | d6ac172a | Peter Maydell | .fields = (VMStateField[]) { |
30 | d6ac172a | Peter Maydell | VMSTATE_UINT32(cr, pl050_state), |
31 | d6ac172a | Peter Maydell | VMSTATE_UINT32(clk, pl050_state), |
32 | d6ac172a | Peter Maydell | VMSTATE_UINT32(last, pl050_state), |
33 | d6ac172a | Peter Maydell | VMSTATE_INT32(pending, pl050_state), |
34 | d6ac172a | Peter Maydell | VMSTATE_END_OF_LIST() |
35 | d6ac172a | Peter Maydell | } |
36 | d6ac172a | Peter Maydell | }; |
37 | d6ac172a | Peter Maydell | |
38 | 9e61ec31 | pbrook | #define PL050_TXEMPTY (1 << 6) |
39 | 9e61ec31 | pbrook | #define PL050_TXBUSY (1 << 5) |
40 | 9e61ec31 | pbrook | #define PL050_RXFULL (1 << 4) |
41 | 9e61ec31 | pbrook | #define PL050_RXBUSY (1 << 3) |
42 | 9e61ec31 | pbrook | #define PL050_RXPARITY (1 << 2) |
43 | 9e61ec31 | pbrook | #define PL050_KMIC (1 << 1) |
44 | 9e61ec31 | pbrook | #define PL050_KMID (1 << 0) |
45 | 9e61ec31 | pbrook | |
46 | cdbdb648 | pbrook | static const unsigned char pl050_id[] = |
47 | cdbdb648 | pbrook | { 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 }; |
48 | cdbdb648 | pbrook | |
49 | cdbdb648 | pbrook | static void pl050_update(void *opaque, int level) |
50 | cdbdb648 | pbrook | { |
51 | cdbdb648 | pbrook | pl050_state *s = (pl050_state *)opaque; |
52 | cdbdb648 | pbrook | int raise;
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53 | cdbdb648 | pbrook | |
54 | cdbdb648 | pbrook | s->pending = level; |
55 | cdbdb648 | pbrook | raise = (s->pending && (s->cr & 0x10) != 0) |
56 | cdbdb648 | pbrook | || (s->cr & 0x08) != 0; |
57 | d537cf6c | pbrook | qemu_set_irq(s->irq, raise); |
58 | cdbdb648 | pbrook | } |
59 | cdbdb648 | pbrook | |
60 | a8170e5e | Avi Kivity | static uint64_t pl050_read(void *opaque, hwaddr offset, |
61 | b8f7a738 | Avi Kivity | unsigned size)
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62 | cdbdb648 | pbrook | { |
63 | cdbdb648 | pbrook | pl050_state *s = (pl050_state *)opaque; |
64 | cdbdb648 | pbrook | if (offset >= 0xfe0 && offset < 0x1000) |
65 | cdbdb648 | pbrook | return pl050_id[(offset - 0xfe0) >> 2]; |
66 | cdbdb648 | pbrook | |
67 | cdbdb648 | pbrook | switch (offset >> 2) { |
68 | cdbdb648 | pbrook | case 0: /* KMICR */ |
69 | cdbdb648 | pbrook | return s->cr;
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70 | cdbdb648 | pbrook | case 1: /* KMISTAT */ |
71 | 9e61ec31 | pbrook | { |
72 | 9e61ec31 | pbrook | uint8_t val; |
73 | 9e61ec31 | pbrook | uint32_t stat; |
74 | 9e61ec31 | pbrook | |
75 | 9e61ec31 | pbrook | val = s->last; |
76 | 9e61ec31 | pbrook | val = val ^ (val >> 4);
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77 | 9e61ec31 | pbrook | val = val ^ (val >> 2);
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78 | 9e61ec31 | pbrook | val = (val ^ (val >> 1)) & 1; |
79 | 9e61ec31 | pbrook | |
80 | 9e61ec31 | pbrook | stat = PL050_TXEMPTY; |
81 | 9e61ec31 | pbrook | if (val)
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82 | 9e61ec31 | pbrook | stat |= PL050_RXPARITY; |
83 | 9e61ec31 | pbrook | if (s->pending)
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84 | 9e61ec31 | pbrook | stat |= PL050_RXFULL; |
85 | 9e61ec31 | pbrook | |
86 | 9e61ec31 | pbrook | return stat;
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87 | cdbdb648 | pbrook | } |
88 | cdbdb648 | pbrook | case 2: /* KMIDATA */ |
89 | cdbdb648 | pbrook | if (s->pending)
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90 | cdbdb648 | pbrook | s->last = ps2_read_data(s->dev); |
91 | cdbdb648 | pbrook | return s->last;
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92 | cdbdb648 | pbrook | case 3: /* KMICLKDIV */ |
93 | cdbdb648 | pbrook | return s->clk;
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94 | cdbdb648 | pbrook | case 4: /* KMIIR */ |
95 | cdbdb648 | pbrook | return s->pending | 2; |
96 | cdbdb648 | pbrook | default:
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97 | fbfecf43 | Peter Maydell | qemu_log_mask(LOG_GUEST_ERROR, |
98 | fbfecf43 | Peter Maydell | "pl050_read: Bad offset %x\n", (int)offset); |
99 | cdbdb648 | pbrook | return 0; |
100 | cdbdb648 | pbrook | } |
101 | cdbdb648 | pbrook | } |
102 | cdbdb648 | pbrook | |
103 | a8170e5e | Avi Kivity | static void pl050_write(void *opaque, hwaddr offset, |
104 | b8f7a738 | Avi Kivity | uint64_t value, unsigned size)
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105 | cdbdb648 | pbrook | { |
106 | cdbdb648 | pbrook | pl050_state *s = (pl050_state *)opaque; |
107 | cdbdb648 | pbrook | switch (offset >> 2) { |
108 | cdbdb648 | pbrook | case 0: /* KMICR */ |
109 | cdbdb648 | pbrook | s->cr = value; |
110 | cdbdb648 | pbrook | pl050_update(s, s->pending); |
111 | cdbdb648 | pbrook | /* ??? Need to implement the enable/disable bit. */
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112 | cdbdb648 | pbrook | break;
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113 | cdbdb648 | pbrook | case 2: /* KMIDATA */ |
114 | cdbdb648 | pbrook | /* ??? This should toggle the TX interrupt line. */
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115 | cdbdb648 | pbrook | /* ??? This means kbd/mouse can block each other. */
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116 | cdbdb648 | pbrook | if (s->is_mouse) {
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117 | cdbdb648 | pbrook | ps2_write_mouse(s->dev, value); |
118 | cdbdb648 | pbrook | } else {
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119 | cdbdb648 | pbrook | ps2_write_keyboard(s->dev, value); |
120 | cdbdb648 | pbrook | } |
121 | cdbdb648 | pbrook | break;
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122 | cdbdb648 | pbrook | case 3: /* KMICLKDIV */ |
123 | cdbdb648 | pbrook | s->clk = value; |
124 | cdbdb648 | pbrook | return;
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125 | cdbdb648 | pbrook | default:
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126 | fbfecf43 | Peter Maydell | qemu_log_mask(LOG_GUEST_ERROR, |
127 | fbfecf43 | Peter Maydell | "pl050_write: Bad offset %x\n", (int)offset); |
128 | cdbdb648 | pbrook | } |
129 | cdbdb648 | pbrook | } |
130 | b8f7a738 | Avi Kivity | static const MemoryRegionOps pl050_ops = { |
131 | b8f7a738 | Avi Kivity | .read = pl050_read, |
132 | b8f7a738 | Avi Kivity | .write = pl050_write, |
133 | b8f7a738 | Avi Kivity | .endianness = DEVICE_NATIVE_ENDIAN, |
134 | cdbdb648 | pbrook | }; |
135 | cdbdb648 | pbrook | |
136 | 81a322d4 | Gerd Hoffmann | static int pl050_init(SysBusDevice *dev, int is_mouse) |
137 | cdbdb648 | pbrook | { |
138 | 86394e96 | Paul Brook | pl050_state *s = FROM_SYSBUS(pl050_state, dev); |
139 | cdbdb648 | pbrook | |
140 | b8f7a738 | Avi Kivity | memory_region_init_io(&s->iomem, &pl050_ops, s, "pl050", 0x1000); |
141 | 750ecd44 | Avi Kivity | sysbus_init_mmio(dev, &s->iomem); |
142 | 86394e96 | Paul Brook | sysbus_init_irq(dev, &s->irq); |
143 | cdbdb648 | pbrook | s->is_mouse = is_mouse; |
144 | 86394e96 | Paul Brook | if (s->is_mouse)
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145 | cdbdb648 | pbrook | s->dev = ps2_mouse_init(pl050_update, s); |
146 | cdbdb648 | pbrook | else
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147 | cdbdb648 | pbrook | s->dev = ps2_kbd_init(pl050_update, s); |
148 | 81a322d4 | Gerd Hoffmann | return 0; |
149 | cdbdb648 | pbrook | } |
150 | 86394e96 | Paul Brook | |
151 | 81a322d4 | Gerd Hoffmann | static int pl050_init_keyboard(SysBusDevice *dev) |
152 | 86394e96 | Paul Brook | { |
153 | 81a322d4 | Gerd Hoffmann | return pl050_init(dev, 0); |
154 | 86394e96 | Paul Brook | } |
155 | 86394e96 | Paul Brook | |
156 | 81a322d4 | Gerd Hoffmann | static int pl050_init_mouse(SysBusDevice *dev) |
157 | 86394e96 | Paul Brook | { |
158 | 81a322d4 | Gerd Hoffmann | return pl050_init(dev, 1); |
159 | 86394e96 | Paul Brook | } |
160 | 86394e96 | Paul Brook | |
161 | 999e12bb | Anthony Liguori | static void pl050_kbd_class_init(ObjectClass *klass, void *data) |
162 | 999e12bb | Anthony Liguori | { |
163 | 39bffca2 | Anthony Liguori | DeviceClass *dc = DEVICE_CLASS(klass); |
164 | 999e12bb | Anthony Liguori | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
165 | 999e12bb | Anthony Liguori | |
166 | 999e12bb | Anthony Liguori | k->init = pl050_init_keyboard; |
167 | 39bffca2 | Anthony Liguori | dc->vmsd = &vmstate_pl050; |
168 | 999e12bb | Anthony Liguori | } |
169 | 999e12bb | Anthony Liguori | |
170 | 8c43a6f0 | Andreas Färber | static const TypeInfo pl050_kbd_info = { |
171 | 39bffca2 | Anthony Liguori | .name = "pl050_keyboard",
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172 | 39bffca2 | Anthony Liguori | .parent = TYPE_SYS_BUS_DEVICE, |
173 | 39bffca2 | Anthony Liguori | .instance_size = sizeof(pl050_state),
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174 | 39bffca2 | Anthony Liguori | .class_init = pl050_kbd_class_init, |
175 | d6ac172a | Peter Maydell | }; |
176 | d6ac172a | Peter Maydell | |
177 | 999e12bb | Anthony Liguori | static void pl050_mouse_class_init(ObjectClass *klass, void *data) |
178 | 999e12bb | Anthony Liguori | { |
179 | 39bffca2 | Anthony Liguori | DeviceClass *dc = DEVICE_CLASS(klass); |
180 | 999e12bb | Anthony Liguori | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
181 | 999e12bb | Anthony Liguori | |
182 | 999e12bb | Anthony Liguori | k->init = pl050_init_mouse; |
183 | 39bffca2 | Anthony Liguori | dc->vmsd = &vmstate_pl050; |
184 | 999e12bb | Anthony Liguori | } |
185 | 999e12bb | Anthony Liguori | |
186 | 8c43a6f0 | Andreas Färber | static const TypeInfo pl050_mouse_info = { |
187 | 39bffca2 | Anthony Liguori | .name = "pl050_mouse",
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188 | 39bffca2 | Anthony Liguori | .parent = TYPE_SYS_BUS_DEVICE, |
189 | 39bffca2 | Anthony Liguori | .instance_size = sizeof(pl050_state),
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190 | 39bffca2 | Anthony Liguori | .class_init = pl050_mouse_class_init, |
191 | d6ac172a | Peter Maydell | }; |
192 | d6ac172a | Peter Maydell | |
193 | 83f7d43a | Andreas Färber | static void pl050_register_types(void) |
194 | 86394e96 | Paul Brook | { |
195 | 39bffca2 | Anthony Liguori | type_register_static(&pl050_kbd_info); |
196 | 39bffca2 | Anthony Liguori | type_register_static(&pl050_mouse_info); |
197 | 86394e96 | Paul Brook | } |
198 | 86394e96 | Paul Brook | |
199 | 83f7d43a | Andreas Färber | type_init(pl050_register_types) |