i8250.h

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/*
 * Copyright (C) 2009 Niek Linnenbank
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __SERVER_SERIAL_I8250_H
#define __SERVER_SERIAL_I8250_H
 
#include <Macros.h>
#include <Types.h>
#include "SerialDevice.h"
 
class i8250 : public SerialDevice
{
  private:
 
    enum Constants
    {
        TRANSMIT     = 0,
        RECEIVE      = 0,
        DIVISORLOW   = 0,
        DIVISORHIGH  = 1,
        RXREADY      = 1,
        IRQCONTROL   = 1,
        IRQSTATUS    = 2,
        FIFOCONTROL  = 2,
        LINECONTROL  = 3,
        MODEMCONTROL = 4,
        LINESTATUS   = 5,
        TXREADY      = 0x20,
        DLAB         = 0x80,
        BAUDRATE     = 9600,
    };
 
  public:
 
    i8250(const u32 irq, const u16 base);
 
    virtual FileSystem::Result initialize();
 
    virtual FileSystem::Result interrupt(const Size vector);
 
    virtual FileSystem::Result read(IOBuffer & buffer,
                                    Size & size,
                                    const Size offset);
 
    virtual FileSystem::Result write(IOBuffer & buffer,
                                     Size & size,
                                     const Size offset);
};
 
#endif /* __SERVER_SERIAL_I8250_H */