1/*
2 * Copyright (c) 2008 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#ifndef __DEV_X86_I8042_HH__
32#define __DEV_X86_I8042_HH__
33
34#include <queue>
35
36#include "dev/x86/intdev.hh"
37#include "dev/io_device.hh"
38#include "params/I8042.hh"
39
40namespace X86ISA
41{
42
43class IntPin;
44
45class PS2Device
46{
47 protected:
48 std::queue<uint8_t> outBuffer;
49
50 static const uint16_t NoCommand = (uint16_t)(-1);
51
52 uint16_t lastCommand;
53 void bufferData(const uint8_t *data, int size);
54 void ack();
55 void nack();
56
57 public:
58 virtual ~PS2Device()
59 {};
60
61 PS2Device() : lastCommand(NoCommand)
62 {}
63
64 bool hasData()
65 {
66 return !outBuffer.empty();
67 }
68
69 uint8_t getData()
70 {
71 uint8_t data = outBuffer.front();
72 outBuffer.pop();
73 return data;
74 }
75
76 virtual bool processData(uint8_t data) = 0;
77};
78
79class PS2Mouse : public PS2Device
80{

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112 uint8_t resolution;
113 uint8_t sampleRate;
114 public:
115 PS2Mouse() : PS2Device(), status(0), resolution(4), sampleRate(100)
116 {}
117
118 bool processData(uint8_t data);
119
120 void serialize(const std::string &base, CheckpointOut &cp);
121 void unserialize(const std::string &base, CheckpointIn &cp);
122};
123
124class PS2Keyboard : public PS2Device
125{
126 protected:
127 static const uint8_t ID[];
128
129 enum Command

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144 KeyToMakeRelease = 0xFC,
145 KeyToMakeOnly = 0xFD,
146 Resend = 0xFE,
147 Reset = 0xFF
148 };
149
150 public:
151 bool processData(uint8_t data);
152
153 void serialize(const std::string &base, CheckpointOut &cp);
154 void unserialize(const std::string &base, CheckpointIn &cp);
155};
156
157class I8042 : public BasicPioDevice
158{
159 protected:
160 enum Command
161 {
162 GetCommandByte = 0x20,

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242 I8042(Params *p);
243
244 AddrRangeList getAddrRanges() const;
245
246 Tick read(PacketPtr pkt);
247
248 Tick write(PacketPtr pkt);
249
250 void serializeOld(CheckpointOut &cp) M5_ATTR_OVERRIDE;
251 void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
252};
253
254} // namespace X86ISA
255
256#endif //__DEV_X86_I8042_HH__