root / hw / pl050.c @ 5c3234c6
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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 | cdbdb648 | pbrook | * This code is licenced under the GPL.
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8 | cdbdb648 | pbrook | */
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9 | cdbdb648 | pbrook | |
10 | 86394e96 | Paul Brook | #include "sysbus.h" |
11 | 87ecb68b | pbrook | #include "ps2.h" |
12 | cdbdb648 | pbrook | |
13 | cdbdb648 | pbrook | typedef struct { |
14 | 86394e96 | Paul Brook | SysBusDevice busdev; |
15 | cdbdb648 | pbrook | void *dev;
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16 | cdbdb648 | pbrook | uint32_t cr; |
17 | cdbdb648 | pbrook | uint32_t clk; |
18 | cdbdb648 | pbrook | uint32_t last; |
19 | cdbdb648 | pbrook | int pending;
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20 | d537cf6c | pbrook | qemu_irq irq; |
21 | cdbdb648 | pbrook | int is_mouse;
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22 | cdbdb648 | pbrook | } pl050_state; |
23 | cdbdb648 | pbrook | |
24 | d6ac172a | Peter Maydell | static const VMStateDescription vmstate_pl050 = { |
25 | d6ac172a | Peter Maydell | .name = "pl050",
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26 | d6ac172a | Peter Maydell | .version_id = 1,
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27 | d6ac172a | Peter Maydell | .minimum_version_id = 1,
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28 | d6ac172a | Peter Maydell | .fields = (VMStateField[]) { |
29 | d6ac172a | Peter Maydell | VMSTATE_UINT32(cr, pl050_state), |
30 | d6ac172a | Peter Maydell | VMSTATE_UINT32(clk, pl050_state), |
31 | d6ac172a | Peter Maydell | VMSTATE_UINT32(last, pl050_state), |
32 | d6ac172a | Peter Maydell | VMSTATE_INT32(pending, pl050_state), |
33 | d6ac172a | Peter Maydell | VMSTATE_INT32(is_mouse, 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 | c227f099 | Anthony Liguori | static uint32_t pl050_read(void *opaque, target_phys_addr_t offset) |
61 | cdbdb648 | pbrook | { |
62 | cdbdb648 | pbrook | pl050_state *s = (pl050_state *)opaque; |
63 | cdbdb648 | pbrook | if (offset >= 0xfe0 && offset < 0x1000) |
64 | cdbdb648 | pbrook | return pl050_id[(offset - 0xfe0) >> 2]; |
65 | cdbdb648 | pbrook | |
66 | cdbdb648 | pbrook | switch (offset >> 2) { |
67 | cdbdb648 | pbrook | case 0: /* KMICR */ |
68 | cdbdb648 | pbrook | return s->cr;
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69 | cdbdb648 | pbrook | case 1: /* KMISTAT */ |
70 | 9e61ec31 | pbrook | { |
71 | 9e61ec31 | pbrook | uint8_t val; |
72 | 9e61ec31 | pbrook | uint32_t stat; |
73 | 9e61ec31 | pbrook | |
74 | 9e61ec31 | pbrook | val = s->last; |
75 | 9e61ec31 | pbrook | val = val ^ (val >> 4);
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76 | 9e61ec31 | pbrook | val = val ^ (val >> 2);
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77 | 9e61ec31 | pbrook | val = (val ^ (val >> 1)) & 1; |
78 | 9e61ec31 | pbrook | |
79 | 9e61ec31 | pbrook | stat = PL050_TXEMPTY; |
80 | 9e61ec31 | pbrook | if (val)
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81 | 9e61ec31 | pbrook | stat |= PL050_RXPARITY; |
82 | 9e61ec31 | pbrook | if (s->pending)
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83 | 9e61ec31 | pbrook | stat |= PL050_RXFULL; |
84 | 9e61ec31 | pbrook | |
85 | 9e61ec31 | pbrook | return stat;
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86 | cdbdb648 | pbrook | } |
87 | cdbdb648 | pbrook | case 2: /* KMIDATA */ |
88 | cdbdb648 | pbrook | if (s->pending)
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89 | cdbdb648 | pbrook | s->last = ps2_read_data(s->dev); |
90 | cdbdb648 | pbrook | return s->last;
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91 | cdbdb648 | pbrook | case 3: /* KMICLKDIV */ |
92 | cdbdb648 | pbrook | return s->clk;
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93 | cdbdb648 | pbrook | case 4: /* KMIIR */ |
94 | cdbdb648 | pbrook | return s->pending | 2; |
95 | cdbdb648 | pbrook | default:
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96 | 2ac71179 | Paul Brook | hw_error("pl050_read: Bad offset %x\n", (int)offset); |
97 | cdbdb648 | pbrook | return 0; |
98 | cdbdb648 | pbrook | } |
99 | cdbdb648 | pbrook | } |
100 | cdbdb648 | pbrook | |
101 | c227f099 | Anthony Liguori | static void pl050_write(void *opaque, target_phys_addr_t offset, |
102 | cdbdb648 | pbrook | uint32_t value) |
103 | cdbdb648 | pbrook | { |
104 | cdbdb648 | pbrook | pl050_state *s = (pl050_state *)opaque; |
105 | cdbdb648 | pbrook | switch (offset >> 2) { |
106 | cdbdb648 | pbrook | case 0: /* KMICR */ |
107 | cdbdb648 | pbrook | s->cr = value; |
108 | cdbdb648 | pbrook | pl050_update(s, s->pending); |
109 | cdbdb648 | pbrook | /* ??? Need to implement the enable/disable bit. */
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110 | cdbdb648 | pbrook | break;
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111 | cdbdb648 | pbrook | case 2: /* KMIDATA */ |
112 | cdbdb648 | pbrook | /* ??? This should toggle the TX interrupt line. */
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113 | cdbdb648 | pbrook | /* ??? This means kbd/mouse can block each other. */
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114 | cdbdb648 | pbrook | if (s->is_mouse) {
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115 | cdbdb648 | pbrook | ps2_write_mouse(s->dev, value); |
116 | cdbdb648 | pbrook | } else {
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117 | cdbdb648 | pbrook | ps2_write_keyboard(s->dev, value); |
118 | cdbdb648 | pbrook | } |
119 | cdbdb648 | pbrook | break;
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120 | cdbdb648 | pbrook | case 3: /* KMICLKDIV */ |
121 | cdbdb648 | pbrook | s->clk = value; |
122 | cdbdb648 | pbrook | return;
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123 | cdbdb648 | pbrook | default:
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124 | 2ac71179 | Paul Brook | hw_error("pl050_write: Bad offset %x\n", (int)offset); |
125 | cdbdb648 | pbrook | } |
126 | cdbdb648 | pbrook | } |
127 | d60efc6b | Blue Swirl | static CPUReadMemoryFunc * const pl050_readfn[] = { |
128 | cdbdb648 | pbrook | pl050_read, |
129 | cdbdb648 | pbrook | pl050_read, |
130 | cdbdb648 | pbrook | pl050_read |
131 | cdbdb648 | pbrook | }; |
132 | cdbdb648 | pbrook | |
133 | d60efc6b | Blue Swirl | static CPUWriteMemoryFunc * const pl050_writefn[] = { |
134 | cdbdb648 | pbrook | pl050_write, |
135 | cdbdb648 | pbrook | pl050_write, |
136 | cdbdb648 | pbrook | pl050_write |
137 | cdbdb648 | pbrook | }; |
138 | cdbdb648 | pbrook | |
139 | 81a322d4 | Gerd Hoffmann | static int pl050_init(SysBusDevice *dev, int is_mouse) |
140 | cdbdb648 | pbrook | { |
141 | 86394e96 | Paul Brook | pl050_state *s = FROM_SYSBUS(pl050_state, dev); |
142 | cdbdb648 | pbrook | int iomemtype;
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143 | cdbdb648 | pbrook | |
144 | 1eed09cb | Avi Kivity | iomemtype = cpu_register_io_memory(pl050_readfn, |
145 | 2507c12a | Alexander Graf | pl050_writefn, s, |
146 | 2507c12a | Alexander Graf | DEVICE_NATIVE_ENDIAN); |
147 | 86394e96 | Paul Brook | sysbus_init_mmio(dev, 0x1000, iomemtype);
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148 | 86394e96 | Paul Brook | sysbus_init_irq(dev, &s->irq); |
149 | cdbdb648 | pbrook | s->is_mouse = is_mouse; |
150 | 86394e96 | Paul Brook | if (s->is_mouse)
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151 | cdbdb648 | pbrook | s->dev = ps2_mouse_init(pl050_update, s); |
152 | cdbdb648 | pbrook | else
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153 | cdbdb648 | pbrook | s->dev = ps2_kbd_init(pl050_update, s); |
154 | 81a322d4 | Gerd Hoffmann | return 0; |
155 | cdbdb648 | pbrook | } |
156 | 86394e96 | Paul Brook | |
157 | 81a322d4 | Gerd Hoffmann | static int pl050_init_keyboard(SysBusDevice *dev) |
158 | 86394e96 | Paul Brook | { |
159 | 81a322d4 | Gerd Hoffmann | return pl050_init(dev, 0); |
160 | 86394e96 | Paul Brook | } |
161 | 86394e96 | Paul Brook | |
162 | 81a322d4 | Gerd Hoffmann | static int pl050_init_mouse(SysBusDevice *dev) |
163 | 86394e96 | Paul Brook | { |
164 | 81a322d4 | Gerd Hoffmann | return pl050_init(dev, 1); |
165 | 86394e96 | Paul Brook | } |
166 | 86394e96 | Paul Brook | |
167 | d6ac172a | Peter Maydell | static SysBusDeviceInfo pl050_kbd_info = {
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168 | d6ac172a | Peter Maydell | .init = pl050_init_keyboard, |
169 | d6ac172a | Peter Maydell | .qdev.name = "pl050_keyboard",
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170 | d6ac172a | Peter Maydell | .qdev.size = sizeof(pl050_state),
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171 | d6ac172a | Peter Maydell | .qdev.vmsd = &vmstate_pl050, |
172 | d6ac172a | Peter Maydell | }; |
173 | d6ac172a | Peter Maydell | |
174 | d6ac172a | Peter Maydell | static SysBusDeviceInfo pl050_mouse_info = {
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175 | d6ac172a | Peter Maydell | .init = pl050_init_mouse, |
176 | d6ac172a | Peter Maydell | .qdev.name = "pl050_mouse",
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177 | d6ac172a | Peter Maydell | .qdev.size = sizeof(pl050_state),
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178 | d6ac172a | Peter Maydell | .qdev.vmsd = &vmstate_pl050, |
179 | d6ac172a | Peter Maydell | }; |
180 | d6ac172a | Peter Maydell | |
181 | 86394e96 | Paul Brook | static void pl050_register_devices(void) |
182 | 86394e96 | Paul Brook | { |
183 | d6ac172a | Peter Maydell | sysbus_register_withprop(&pl050_kbd_info); |
184 | d6ac172a | Peter Maydell | sysbus_register_withprop(&pl050_mouse_info); |
185 | 86394e96 | Paul Brook | } |
186 | 86394e96 | Paul Brook | |
187 | 86394e96 | Paul Brook | device_init(pl050_register_devices) |