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/////////////////////////////////////////////////////////////////////////
// $Id: parallel.cc,v 1.17 2002/01/29 17:20:11 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
////////////////////////////////////////////////////////
// This code was just a few stubs until Volker.Ruppert@t-online.de
// fixed it up in November 2001.
#include "bochs.h"
#define LOG_THIS bx_parallel.
#define OUTPUT (BX_PAR_THIS output)
bx_parallel_c bx_parallel;
#if BX_USE_PAR_SMF
#define this (&bx_parallel)
#endif
bx_parallel_c::bx_parallel_c(void)
{
put("PAR");
settype(PARLOG);
OUTPUT = NULL;
}
bx_parallel_c::~bx_parallel_c(void)
{
if (OUTPUT != NULL)
fclose(OUTPUT);
}
void
bx_parallel_c::init(bx_devices_c *d)
{
BX_DEBUG(("Init $Id: parallel.cc,v 1.17 2002/01/29 17:20:11 vruppert Exp $"));
BX_PAR_THIS devices = d;
/* PARALLEL PORT 1 */
BX_PAR_THIS devices->register_irq(7, "Parallel Port 1");
for (unsigned addr=0x0378; addr<=0x037A; addr++) {
BX_PAR_THIS devices->register_io_read_handler(this,
read_handler, addr, "Parallel Port 1");
}
BX_PAR_THIS devices->register_io_write_handler(this,
write_handler, 0x0378, "Parallel Port 1");
BX_PAR_THIS devices->register_io_write_handler(this,
write_handler, 0x037A, "Parallel Port 1");
BX_PAR_THIS s.STATUS.error = 1;
BX_PAR_THIS s.STATUS.slct = 1;
BX_PAR_THIS s.STATUS.pe = 0;
BX_PAR_THIS s.STATUS.ack = 1;
BX_PAR_THIS s.STATUS.busy = 1;
BX_PAR_THIS s.CONTROL.strobe = 0;
BX_PAR_THIS s.CONTROL.autofeed = 0;
BX_PAR_THIS s.CONTROL.init = 1;
BX_PAR_THIS s.CONTROL.slct_in = 1;
BX_PAR_THIS s.CONTROL.irq = 0;
BX_PAR_THIS s.CONTROL.input = 0;
BX_PAR_THIS initmode = 0;
if (bx_options.par1.Oenable->get ()) {
OUTPUT = fopen(bx_options.par1.Ooutfile->getptr (), "wb");
if (!OUTPUT)
BX_PANIC (("Could not open '%s' to write parport1 output"));
}
}
void
bx_parallel_c::virtual_printer(void)
{
if (BX_PAR_THIS s.STATUS.slct) {
if (OUTPUT != NULL) {
fputc(BX_PAR_THIS s.data, OUTPUT);
fflush (OUTPUT);
}
if (BX_PAR_THIS s.CONTROL.irq == 1) {
BX_PAR_THIS devices->pic->raise_irq(7);
}
BX_PAR_THIS s.STATUS.ack = 0;
BX_PAR_THIS s.STATUS.busy = 1;
}
else {
BX_ERROR(("data is valid, but printer is offline"));
}
}
// static IO port read callback handler
// redirects to non-static class handler to avoid virtual functions
Bit32u
bx_parallel_c::read_handler(void *this_ptr, Bit32u address, unsigned io_len)
{
#if !BX_USE_PAR_SMF
bx_parallel_c *class_ptr = (bx_parallel_c *) this_ptr;
return( class_ptr->read(address, io_len) );
}
Bit32u
bx_parallel_c::read(Bit32u address, unsigned io_len)
{
#else
UNUSED(this_ptr);
#endif // !BX_USE_PAR_SMF
Bit32u retval;
if (io_len == 1) {
switch (address) {
case 0x0378:
if (!BX_PAR_THIS s.CONTROL.input) {
return (Bit32u)BX_PAR_THIS s.data;
}
else {
BX_ERROR(("read: input mode not supported"));
return (0xFF);
}
break;
case 0x0379:
{
retval = ((BX_PAR_THIS s.STATUS.busy << 7) |
(BX_PAR_THIS s.STATUS.ack << 6) |
(BX_PAR_THIS s.STATUS.pe << 5) |
(BX_PAR_THIS s.STATUS.slct << 4) |
(BX_PAR_THIS s.STATUS.error << 3));
if (BX_PAR_THIS s.STATUS.ack == 0) {
BX_PAR_THIS s.STATUS.ack = 1;
if (BX_PAR_THIS s.CONTROL.irq == 1) {
BX_PAR_THIS devices->pic->lower_irq(7);
}
}
if (BX_PAR_THIS initmode == 1) {
BX_PAR_THIS s.STATUS.busy = 1;
BX_PAR_THIS s.STATUS.slct = 1;
BX_PAR_THIS initmode = 0;
}
BX_DEBUG(("read: status register returns 0x%02x", retval));
return retval;
}
break;
case 0x037A:
{
retval = ((BX_PAR_THIS s.CONTROL.input << 5) |
(BX_PAR_THIS s.CONTROL.irq << 4) |
(BX_PAR_THIS s.CONTROL.slct_in << 3) |
(BX_PAR_THIS s.CONTROL.init << 2) |
(BX_PAR_THIS s.CONTROL.autofeed << 1) |
(BX_PAR_THIS s.CONTROL.strobe));
BX_DEBUG(("read: control register returns 0x%02x", retval));
return retval;
}
break;
}
}
/* PARALLEL PORT 1 */
return(0);
}
// static IO port write callback handler
// redirects to non-static class handler to avoid virtual functions
void
bx_parallel_c::write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len)
{
#if !BX_USE_PAR_SMF
bx_parallel_c *class_ptr = (bx_parallel_c *) this_ptr;
class_ptr->write(address, value, io_len);
}
void
bx_parallel_c::write(Bit32u address, Bit32u value, unsigned io_len)
{
#else
UNUSED(this_ptr);
#endif // !BX_USE_PAR_SMF
if (io_len == 1) {
switch (address) {
case 0x0378:
BX_PAR_THIS s.data = (Bit8u)value;
BX_DEBUG(("write: data output register = 0x%02x", (Bit8u)value));
break;
case 0x037A:
{
if ((value & 0x01) == 0x01) {
if (BX_PAR_THIS s.CONTROL.strobe == 0) {
BX_PAR_THIS s.CONTROL.strobe = 1;
virtual_printer(); // data is valid now
}
} else {
if (BX_PAR_THIS s.CONTROL.strobe == 1) {
BX_PAR_THIS s.CONTROL.strobe = 0;
}
}
BX_PAR_THIS s.CONTROL.autofeed = ((value & 0x02) == 0x02);
if ((value & 0x04) == 0x04) {
if (BX_PAR_THIS s.CONTROL.init == 0) {
BX_PAR_THIS s.CONTROL.init = 1;
BX_PAR_THIS s.STATUS.busy = 0;
BX_PAR_THIS s.STATUS.slct = 0;
BX_PAR_THIS initmode = 1;
BX_DEBUG(("printer init requested"));
}
} else {
if (BX_PAR_THIS s.CONTROL.init == 1) {
BX_PAR_THIS s.CONTROL.init = 0;
}
}
if ((value & 0x08) == 0x08) {
if (BX_PAR_THIS s.CONTROL.slct_in == 0) {
BX_PAR_THIS s.CONTROL.slct_in = 1;
BX_DEBUG(("printer now online"));
}
} else {
if (BX_PAR_THIS s.CONTROL.slct_in == 1) {
BX_PAR_THIS s.CONTROL.slct_in = 0;
BX_DEBUG(("printer now offline"));
}
}
BX_PAR_THIS s.STATUS.slct = BX_PAR_THIS s.CONTROL.slct_in;
if ((value & 0x10) == 0x10) {
if (BX_PAR_THIS s.CONTROL.irq == 0) {
BX_PAR_THIS s.CONTROL.irq = 1;
BX_DEBUG(("irq mode selected"));
}
} else {
if (BX_PAR_THIS s.CONTROL.irq == 1) {
BX_PAR_THIS s.CONTROL.irq = 0;
BX_DEBUG(("polling mode selected"));
}
}
if ((value & 0x20) == 0x20) {
if (BX_PAR_THIS s.CONTROL.input == 0) {
BX_PAR_THIS s.CONTROL.input = 1;
BX_DEBUG(("data input mode selected"));
}
} else {
if (BX_PAR_THIS s.CONTROL.input == 1) {
BX_PAR_THIS s.CONTROL.input = 0;
BX_DEBUG(("data output mode selected"));
}
}
if ((value & 0xC0) > 0) {
BX_ERROR(("write: unsupported control bit ignored"));
}
}
break;
}
}
/* PARALLEL PORT 1 */
}
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