kmi.hh revision 11168
1/* 2 * Copyright (c) 2010 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: William Wang 41 */ 42 43 44/** @file 45 * Implementiation of a PL050 KMI 46 */ 47 48#ifndef __DEV_ARM_PL050_HH__ 49#define __DEV_ARM_PL050_HH__ 50 51#include <list> 52 53#include "base/vnc/vncinput.hh" 54#include "dev/arm/amba_device.hh" 55#include "params/Pl050.hh" 56 57class Pl050 : public AmbaIntDevice, public VncKeyboard, public VncMouse 58{ 59 protected: 60 static const int kmiCr = 0x000; 61 static const int kmiStat = 0x004; 62 static const int kmiData = 0x008; 63 static const int kmiClkDiv = 0x00C; 64 static const int kmiISR = 0x010; 65 66 BitUnion8(ControlReg) 67 Bitfield<0> force_clock_low; 68 Bitfield<1> force_data_low; 69 Bitfield<2> enable; 70 Bitfield<3> txint_enable; 71 Bitfield<4> rxint_enable; 72 Bitfield<5> type; 73 EndBitUnion(ControlReg) 74 75 /** control register 76 */ 77 ControlReg control; 78 79 /** KMI status register */ 80 BitUnion8(StatusReg) 81 Bitfield<0> data_in; 82 Bitfield<1> clk_in; 83 Bitfield<2> rxparity; 84 Bitfield<3> rxbusy; 85 Bitfield<4> rxfull; 86 Bitfield<5> txbusy; 87 Bitfield<6> txempty; 88 EndBitUnion(StatusReg) 89 90 StatusReg status; 91 92 /** clock divisor register 93 * This register is just kept around to satisfy reads after driver does 94 * writes. The divsor does nothing, as we're not actually signaling ps2 95 * serial commands to anything. 96 */ 97 uint8_t clkdiv; 98 99 BitUnion8(InterruptReg) 100 Bitfield<0> rx; 101 Bitfield<1> tx; 102 EndBitUnion(InterruptReg) 103 104 /** interrupt status register. */ 105 InterruptReg interrupts; 106 107 /** raw interrupt register (unmasked) */ 108 InterruptReg rawInterrupts; 109 110 /** If the controller should ignore the next data byte and acknowledge it. 111 * The driver is attempting to setup some feature we don't care about 112 */ 113 int ackNext; 114 115 /** is the shift key currently down */ 116 bool shiftDown; 117 118 /** The vnc server we're connected to (if any) */ 119 VncInput *vnc; 120 121 /** If the linux driver has initialized the device yet and thus can we send 122 * mouse data */ 123 bool driverInitialized; 124 125 /** Update the status of the interrupt registers and schedule an interrupt 126 * if required */ 127 void updateIntStatus(); 128 129 /** Function to generate interrupt */ 130 void generateInterrupt(); 131 132 /** Wrapper to create an event out of the thing */ 133 EventWrapper<Pl050, &Pl050::generateInterrupt> intEvent; 134 135 /** Receive queue. This list contains all the pending commands that 136 * need to be sent to the driver 137 */ 138 std::list<uint8_t> rxQueue; 139 140 /** Handle a command sent to the kmi and respond appropriately 141 */ 142 void processCommand(uint8_t byte); 143 144 public: 145 typedef Pl050Params Params; 146 const Params * 147 params() const 148 { 149 return dynamic_cast<const Params *>(_params); 150 } 151 152 Pl050(const Params *p); 153 154 virtual Tick read(PacketPtr pkt); 155 virtual Tick write(PacketPtr pkt); 156 157 virtual void mouseAt(uint16_t x, uint16_t y, uint8_t buttons); 158 virtual void keyPress(uint32_t key, bool down); 159 160 void serialize(CheckpointOut &cp) const override; 161 void unserialize(CheckpointIn &cp) override; 162}; 163 164#endif // __DEV_ARM_PL050_HH__ 165