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