mouse.cc

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/*
 * Copyright (c) 2017-2018 ARM Limited
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 *
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 * 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
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 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2008 The Regents of The University of Michigan
 * All rights reserved.
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 * met: redistributions of source code must retain the above copyright
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#include "dev/ps2/mouse.hh"
 
#include "base/logging.hh"
#include "base/trace.hh"
#include "debug/PS2.hh"
#include "dev/ps2/types.hh"
#include "params/PS2Mouse.hh"
#include "sim/serialize.hh"
 
namespace gem5
{
 
namespace ps2
{
 
PS2Mouse::PS2Mouse(const PS2MouseParams &p)
    : Device(p),
      status(0), resolution(4), sampleRate(100)
{
}
 
bool
PS2Mouse::recv(const std::vector<uint8_t> &data)
{
    switch (data[0]) {
      case ReadID:
        DPRINTF(PS2, "Mouse ID requested.\n");
        sendAck();
        send(mouse::ID);
        return true;
      case Disable:
        DPRINTF(PS2, "Disabling data reporting.\n");
        status.enabled = 0;
        sendAck();
        return true;
      case Enable:
        DPRINTF(PS2, "Enabling data reporting.\n");
        status.enabled = 1;
        sendAck();
        return true;
      case Resend:
        panic("Mouse resend unimplemented.\n");
      case Reset:
        DPRINTF(PS2, "Resetting the mouse.\n");
        sampleRate = 100;
        resolution = 4;
        status.twoToOne = 0;
        status.enabled = 0;
        sendAck();
        send(SelfTestPass);
        send(mouse::ID);
        return true;
 
      case mouse::Scale1to1:
        DPRINTF(PS2, "Setting mouse scale to 1:1.\n");
        status.twoToOne = 0;
        sendAck();
        return true;
      case mouse::Scale2to1:
        DPRINTF(PS2, "Setting mouse scale to 2:1.\n");
        status.twoToOne = 1;
        sendAck();
        return true;
      case mouse::SetResolution:
        if (data.size() == 1) {
            DPRINTF(PS2, "Setting mouse resolution.\n");
            sendAck();
            return false;
        } else {
            DPRINTF(PS2, "Mouse resolution set to %d.\n", data[1]);
            resolution = data[1];
            sendAck();
            return true;
        }
      case mouse::GetStatus:
        DPRINTF(PS2, "Getting mouse status.\n");
        sendAck();
        send((uint8_t *)&(status), 1);
        send(&resolution, sizeof(resolution));
        send(&sampleRate, sizeof(sampleRate));
        return true;
      case mouse::ReadData:
        panic("Reading mouse data unimplemented.\n");
      case mouse::ResetWrapMode:
        panic("Resetting mouse wrap mode unimplemented.\n");
      case mouse::WrapMode:
        panic("Setting mouse wrap mode unimplemented.\n");
      case mouse::RemoteMode:
        panic("Setting mouse remote mode unimplemented.\n");
      case mouse::SampleRate:
        if (data.size() == 1) {
            DPRINTF(PS2, "Setting mouse sample rate.\n");
            sendAck();
            return false;
        } else {
            DPRINTF(PS2, "Mouse sample rate %d samples "
                    "per second.\n", data[1]);
            sampleRate = data[1];
            sendAck();
            return true;
        }
      case DefaultsAndDisable:
        DPRINTF(PS2, "Disabling and resetting mouse.\n");
        sampleRate = 100;
        resolution = 4;
        status.twoToOne = 0;
        status.enabled = 0;
        sendAck();
        return true;
      default:
        warn("Unknown mouse command %#02x.\n", data[0]);
        send(Resend);
        return true;
    }
}
 
void
PS2Mouse::serialize(CheckpointOut &cp) const
{
    Device::serialize(cp);
 
    SERIALIZE_SCALAR(status);
    SERIALIZE_SCALAR(resolution);
    SERIALIZE_SCALAR(sampleRate);
}
 
void
PS2Mouse::unserialize(CheckpointIn &cp)
{
    Device::unserialize(cp);
 
    UNSERIALIZE_SCALAR(status);
    UNSERIALIZE_SCALAR(resolution);
    UNSERIALIZE_SCALAR(sampleRate);
}
 
} // namespace ps2
} // namespace gem5