touchkit.cc revision 12655:a1646f7c13ab 
1/*
2 * Copyright (c) 2010, 2017-2018 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 *          William Wang
42 *          Andreas Sandberg
43 */
44
45#include "dev/ps2/touchkit.hh"
46
47#include "base/logging.hh"
48#include "debug/PS2.hh"
49#include "dev/ps2.hh"
50#include "params/PS2TouchKit.hh"
51
52const uint8_t PS2TouchKit::ID[] = {0x00};
53
54PS2TouchKit::PS2TouchKit(const PS2TouchKitParams *p)
55    : PS2Device(p),
56      vnc(p->vnc),
57      ackNext(false),
58      driverInitialized(false)
59{
60    if (vnc)
61        vnc->setMouse(this);
62}
63
64void
65PS2TouchKit::serialize(CheckpointOut &cp) const
66{
67    PS2Device::serialize(cp);
68
69    SERIALIZE_SCALAR(ackNext);
70    SERIALIZE_SCALAR(driverInitialized);
71}
72
73void
74PS2TouchKit::unserialize(CheckpointIn &cp)
75{
76    PS2Device::unserialize(cp);
77
78    UNSERIALIZE_SCALAR(ackNext);
79    UNSERIALIZE_SCALAR(driverInitialized);
80}
81
82void
83PS2TouchKit::recv(uint8_t data)
84{
85    if (ackNext) {
86        ackNext--;
87        sendAck();
88        return;
89    }
90
91    switch (data) {
92      case Ps2::Ps2Reset:
93        sendAck();
94        send(Ps2::SelfTestPass);
95        break;
96
97      case Ps2::SetResolution:
98      case Ps2::SetRate:
99      case Ps2::SetStatusLed:
100        sendAck();
101        ackNext = 1;
102        break;
103
104      case Ps2::ReadId:
105        sendAck();
106        send((const uint8_t *)&ID, sizeof(ID));
107        break;
108
109      case Ps2::TpReadId:
110        // We're not a trackpoint device, this should make the probe
111        // go away
112        sendAck();
113        send(0);
114        send(0);
115        sendAck();
116        break;
117
118      case Ps2::SetScaling1_1:
119      case Ps2::SetScaling1_2:
120      case Ps2::Disable:
121      case Ps2::Enable:
122      case Ps2::SetDefaults:
123        sendAck();
124        break;
125
126      case Ps2::StatusRequest:
127        sendAck();
128        send(0);
129        send(2); // default resolution
130        send(100); // default sample rate
131        break;
132
133      case Ps2::TouchKitId:
134        ackNext = 2;
135        sendAck();
136        send(Ps2::TouchKitId);
137        send(1);
138        send('A');
139
140        driverInitialized = true;
141        break;
142
143      default:
144        panic("Unknown byte received: %d\n", data);
145    }
146}
147
148void
149PS2TouchKit::mouseAt(uint16_t x, uint16_t y, uint8_t buttons)
150{
151    // If the driver hasn't initialized the device yet, no need to try and send
152    // it anything. Similarly we can get vnc mouse events orders of magnitude
153    // faster than m5 can process them. Only queue up two sets mouse movements
154    // and don't add more until those are processed.
155    if (!driverInitialized || sendPending() > 10)
156        return;
157
158    // Convert screen coordinates to touchpad coordinates
159    const uint16_t _x = (2047.0 / vnc->videoWidth()) * x;
160    const uint16_t _y = (2047.0 / vnc->videoHeight()) * y;
161
162    const uint8_t resp[] = {
163        buttons,
164        (uint8_t)(_x >> 7), (uint8_t)(_x & 0x7f),
165        (uint8_t)(_y >> 7), (uint8_t)(_y & 0x7f),
166    };
167
168    send(resp, sizeof(resp));
169}
170
171PS2TouchKit *
172PS2TouchKitParams::create()
173{
174    return new PS2TouchKit(this);
175}
176