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/*
* Copyright (c) 2010, 2017-2018 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: William Wang
*/
/** @file
* Implementiation of a PL050 KMI
*/
#ifndef __DEV_ARM_PL050_HH__
#define __DEV_ARM_PL050_HH__
#include <list>
#include "base/vnc/vncinput.hh"
#include "dev/arm/amba_device.hh"
#include "params/Pl050.hh"
class PS2Device;
class Pl050 : public AmbaIntDevice
{
protected:
static const int kmiCr = 0x000;
static const int kmiStat = 0x004;
static const int kmiData = 0x008;
static const int kmiClkDiv = 0x00C;
static const int kmiISR = 0x010;
BitUnion8(ControlReg)
Bitfield<0> force_clock_low;
Bitfield<1> force_data_low;
Bitfield<2> enable;
Bitfield<3> txint_enable;
Bitfield<4> rxint_enable;
Bitfield<5> type;
EndBitUnion(ControlReg)
/** control register
*/
ControlReg control;
/** KMI status register */
BitUnion8(StatusReg)
Bitfield<0> data_in;
Bitfield<1> clk_in;
Bitfield<2> rxparity;
Bitfield<3> rxbusy;
Bitfield<4> rxfull;
Bitfield<5> txbusy;
Bitfield<6> txempty;
EndBitUnion(StatusReg)
StatusReg status;
/** clock divisor register
* This register is just kept around to satisfy reads after driver does
* writes. The divsor does nothing, as we're not actually signaling ps2
* serial commands to anything.
*/
uint8_t clkdiv;
BitUnion8(InterruptReg)
Bitfield<0> rx;
Bitfield<1> tx;
EndBitUnion(InterruptReg)
/** raw interrupt register (unmasked) */
InterruptReg rawInterrupts;
/** Set or clear the TX interrupt */
void setTxInt(bool value);
/** Update the RX interrupt using PS/2 device state */
void updateRxInt();
/**
* Update the status of the interrupt and control registers and
* deliver an interrupt if required.
*/
void updateIntCtrl(InterruptReg ints, ControlReg ctrl);
void setInterrupts(InterruptReg ints) { updateIntCtrl(ints, control); }
void setControl(ControlReg ctrl) { updateIntCtrl(rawInterrupts, ctrl); }
/** Get current interrupt value */
InterruptReg getInterrupt() const;
/** PS2 device connected to this KMI interface */
PS2Device *ps2;
public:
Pl050(const Pl050Params *p);
Tick read(PacketPtr pkt) override;
Tick write(PacketPtr pkt) override;
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
};
#endif // __DEV_ARM_PL050_HH__
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