i8042.hh revision 10905 
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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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{
81  protected:
82    static const uint8_t ID[];
83
84    enum Command
85    {
86        Scale1to1 = 0xE6,
87        Scale2to1 = 0xE7,
88        SetResolution = 0xE8,
89        GetStatus = 0xE9,
90        ReadData = 0xEB,
91        ResetWrapMode = 0xEC,
92        WrapMode = 0xEE,
93        RemoteMode = 0xF0,
94        ReadID = 0xF2,
95        SampleRate = 0xF3,
96        EnableReporting = 0xF4,
97        DisableReporting = 0xF5,
98        DefaultsAndDisable = 0xF6,
99        Resend = 0xFE,
100        Reset = 0xFF
101    };
102
103    BitUnion8(Status)
104        Bitfield<6> remote;
105        Bitfield<5> enabled;
106        Bitfield<4> twoToOne;
107        Bitfield<2> leftButton;
108        Bitfield<0> rightButton;
109    EndBitUnion(Status)
110
111    Status status;
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
130    {
131        LEDWrite = 0xED,
132        DiagnosticEcho = 0xEE,
133        AlternateScanCodes = 0xF0,
134        ReadID = 0xF2,
135        TypematicInfo = 0xF3,
136        Enable = 0xF4,
137        Disable = 0xF5,
138        DefaultsAndDisable = 0xF6,
139        AllKeysToTypematic = 0xF7,
140        AllKeysToMakeRelease = 0xF8,
141        AllKeysToMake = 0xF9,
142        AllKeysToTypematicMakeRelease = 0xFA,
143        KeyToTypematic = 0xFB,
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,
163        ReadControllerRamBase = 0x20,
164        WriteCommandByte = 0x60,
165        WriteControllerRamBase = 0x60,
166        CheckForPassword = 0xA4,
167        LoadPassword = 0xA5,
168        CheckPassword = 0xA6,
169        DisableMouse = 0xA7,
170        EnableMouse = 0xA8,
171        TestMouse = 0xA9,
172        SelfTest = 0xAA,
173        InterfaceTest = 0xAB,
174        DiagnosticDump = 0xAC,
175        DisableKeyboard = 0xAD,
176        EnableKeyboard = 0xAE,
177        ReadInputPort = 0xC0,
178        ContinuousPollLow = 0xC1,
179        ContinuousPollHigh = 0xC2,
180        ReadOutputPort = 0xD0,
181        WriteOutputPort = 0xD1,
182        WriteKeyboardOutputBuff = 0xD2,
183        WriteMouseOutputBuff = 0xD3,
184        WriteToMouse = 0xD4,
185        DisableA20 = 0xDD,
186        EnableA20 = 0xDF,
187        ReadTestInputs = 0xE0,
188        PulseOutputBitBase = 0xF0,
189        SystemReset = 0xFE
190    };
191
192    BitUnion8(StatusReg)
193        Bitfield<7> parityError;
194        Bitfield<6> timeout;
195        Bitfield<5> mouseOutputFull;
196        Bitfield<4> keyboardUnlocked;
197        Bitfield<3> commandLast;
198        Bitfield<2> passedSelfTest;
199        Bitfield<1> inputFull;
200        Bitfield<0> outputFull;
201    EndBitUnion(StatusReg)
202
203    BitUnion8(CommandByte)
204        Bitfield<6> convertScanCodes;
205        Bitfield<5> disableMouse;
206        Bitfield<4> disableKeyboard;
207        Bitfield<2> passedSelfTest;
208        Bitfield<1> mouseFullInt;
209        Bitfield<0> keyboardFullInt;
210    EndBitUnion(CommandByte)
211
212    Tick latency;
213    Addr dataPort;
214    Addr commandPort;
215
216    StatusReg statusReg;
217    CommandByte commandByte;
218
219    uint8_t dataReg;
220
221    static const uint16_t NoCommand = (uint16_t)(-1);
222    uint16_t lastCommand;
223
224    IntSourcePin *mouseIntPin;
225    IntSourcePin *keyboardIntPin;
226
227    PS2Mouse mouse;
228    PS2Keyboard keyboard;
229
230    void writeData(uint8_t newData, bool mouse = false);
231    uint8_t readDataOut();
232
233  public:
234    typedef I8042Params Params;
235
236    const Params *
237    params() const
238    {
239        return dynamic_cast<const Params *>(_params);
240    }
241
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__
257