297 lines
8.7 KiB
C++
297 lines
8.7 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: parallel.cc,v 1.23 2003-07-31 19:51:42 vruppert Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2002 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////
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// This code was just a few stubs until Volker.Ruppert@t-online.de
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// fixed it up in November 2001.
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// Define BX_PLUGGABLE in files that can be compiled into plugins. For
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// platforms that require a special tag on exported symbols, BX_PLUGGABLE
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// is used to know when we are exporting symbols and when we are importing.
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#define BX_PLUGGABLE
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#include "bochs.h"
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#define LOG_THIS theParallelDevice->
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bx_parallel_c *theParallelDevice = NULL;
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int
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libparallel_LTX_plugin_init(plugin_t *plugin, plugintype_t type, int argc, char *argv[])
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{
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theParallelDevice = new bx_parallel_c ();
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bx_devices.pluginParallelDevice = theParallelDevice;
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BX_REGISTER_DEVICE_DEVMODEL(plugin, type, theParallelDevice, BX_PLUGIN_PARALLEL);
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return(0); // Success
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}
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void
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libparallel_LTX_plugin_fini(void)
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{
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}
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bx_parallel_c::bx_parallel_c(void)
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{
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put("PAR");
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settype(PARLOG);
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s.output = NULL;
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}
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bx_parallel_c::~bx_parallel_c(void)
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{
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if (s.output != NULL)
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fclose(s.output);
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}
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void
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bx_parallel_c::init(void)
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{
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BX_DEBUG(("Init $Id: parallel.cc,v 1.23 2003-07-31 19:51:42 vruppert Exp $"));
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if (bx_options.par[0].Oenabled->get ()) {
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/* PARALLEL PORT 1 */
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DEV_register_irq(7, "Parallel Port 1");
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BX_INFO (("parallel port 1 at 0x378"));
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for (unsigned addr=0x0378; addr<=0x037A; addr++) {
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DEV_register_ioread_handler(this, read_handler, addr, "Parallel Port 1", 1);
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}
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DEV_register_iowrite_handler(this, write_handler, 0x0378, "Parallel Port 1", 1);
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DEV_register_iowrite_handler(this, write_handler, 0x037A, "Parallel Port 1", 1);
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BX_PAR_THIS s.STATUS.error = 1;
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BX_PAR_THIS s.STATUS.slct = 1;
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BX_PAR_THIS s.STATUS.pe = 0;
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BX_PAR_THIS s.STATUS.ack = 1;
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BX_PAR_THIS s.STATUS.busy = 1;
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BX_PAR_THIS s.CONTROL.strobe = 0;
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BX_PAR_THIS s.CONTROL.autofeed = 0;
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BX_PAR_THIS s.CONTROL.init = 1;
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BX_PAR_THIS s.CONTROL.slct_in = 1;
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BX_PAR_THIS s.CONTROL.irq = 0;
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BX_PAR_THIS s.CONTROL.input = 0;
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BX_PAR_THIS s.initmode = 0;
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if (strlen(bx_options.par[0].Ooutfile->getptr ()) > 0) {
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s.output = fopen(bx_options.par[0].Ooutfile->getptr (), "wb");
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if (!s.output)
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BX_PANIC (("Could not open '%s' to write parport1 output",
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bx_options.par[0].Ooutfile->getptr ()));
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}
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}
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}
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void
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bx_parallel_c::reset(unsigned type)
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{
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}
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void
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bx_parallel_c::virtual_printer(void)
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{
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if (BX_PAR_THIS s.STATUS.slct) {
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if (BX_PAR_THIS s.output != NULL) {
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fputc(BX_PAR_THIS s.data, BX_PAR_THIS s.output);
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fflush (BX_PAR_THIS s.output);
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}
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if (BX_PAR_THIS s.CONTROL.irq == 1) {
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DEV_pic_raise_irq(7);
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}
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BX_PAR_THIS s.STATUS.ack = 0;
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BX_PAR_THIS s.STATUS.busy = 1;
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}
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else {
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BX_ERROR(("data is valid, but printer is offline"));
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}
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}
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// static IO port read callback handler
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// redirects to non-static class handler to avoid virtual functions
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Bit32u
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bx_parallel_c::read_handler(void *this_ptr, Bit32u address, unsigned io_len)
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{
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#if !BX_USE_PAR_SMF
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bx_parallel_c *class_ptr = (bx_parallel_c *) this_ptr;
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return( class_ptr->read(address, io_len) );
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}
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Bit32u
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bx_parallel_c::read(Bit32u address, unsigned io_len)
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{
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#else
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UNUSED(this_ptr);
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#endif // !BX_USE_PAR_SMF
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Bit32u retval;
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switch (address) {
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/* PARALLEL PORT 1 */
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case 0x0378:
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if (!BX_PAR_THIS s.CONTROL.input) {
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return (Bit32u)BX_PAR_THIS s.data;
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} else {
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BX_ERROR(("read: input mode not supported"));
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return (0xFF);
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}
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break;
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case 0x0379:
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{
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retval = ((BX_PAR_THIS s.STATUS.busy << 7) |
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(BX_PAR_THIS s.STATUS.ack << 6) |
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(BX_PAR_THIS s.STATUS.pe << 5) |
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(BX_PAR_THIS s.STATUS.slct << 4) |
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(BX_PAR_THIS s.STATUS.error << 3));
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if (BX_PAR_THIS s.STATUS.ack == 0) {
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BX_PAR_THIS s.STATUS.ack = 1;
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if (BX_PAR_THIS s.CONTROL.irq == 1) {
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DEV_pic_lower_irq(7);
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}
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}
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if (BX_PAR_THIS s.initmode == 1) {
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BX_PAR_THIS s.STATUS.busy = 1;
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BX_PAR_THIS s.STATUS.slct = 1;
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BX_PAR_THIS s.initmode = 0;
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}
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BX_DEBUG(("read: status register returns 0x%02x", retval));
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return retval;
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}
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break;
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case 0x037A:
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{
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retval = ((BX_PAR_THIS s.CONTROL.input << 5) |
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(BX_PAR_THIS s.CONTROL.irq << 4) |
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(BX_PAR_THIS s.CONTROL.slct_in << 3) |
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(BX_PAR_THIS s.CONTROL.init << 2) |
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(BX_PAR_THIS s.CONTROL.autofeed << 1) |
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(BX_PAR_THIS s.CONTROL.strobe));
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BX_DEBUG(("read: control register returns 0x%02x", retval));
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return retval;
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}
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break;
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}
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return(0);
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}
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// static IO port write callback handler
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// redirects to non-static class handler to avoid virtual functions
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void
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bx_parallel_c::write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len)
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{
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#if !BX_USE_PAR_SMF
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bx_parallel_c *class_ptr = (bx_parallel_c *) this_ptr;
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class_ptr->write(address, value, io_len);
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}
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void
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bx_parallel_c::write(Bit32u address, Bit32u value, unsigned io_len)
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{
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#else
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UNUSED(this_ptr);
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#endif // !BX_USE_PAR_SMF
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switch (address) {
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/* PARALLEL PORT 1 */
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case 0x0378:
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BX_PAR_THIS s.data = (Bit8u)value;
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BX_DEBUG(("write: data output register = 0x%02x", (Bit8u)value));
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break;
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case 0x037A:
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{
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if ((value & 0x01) == 0x01) {
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if (BX_PAR_THIS s.CONTROL.strobe == 0) {
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BX_PAR_THIS s.CONTROL.strobe = 1;
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virtual_printer(); // data is valid now
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}
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} else {
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if (BX_PAR_THIS s.CONTROL.strobe == 1) {
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BX_PAR_THIS s.CONTROL.strobe = 0;
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}
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}
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BX_PAR_THIS s.CONTROL.autofeed = ((value & 0x02) == 0x02);
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if ((value & 0x04) == 0x04) {
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if (BX_PAR_THIS s.CONTROL.init == 0) {
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BX_PAR_THIS s.CONTROL.init = 1;
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BX_PAR_THIS s.STATUS.busy = 0;
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BX_PAR_THIS s.STATUS.slct = 0;
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BX_PAR_THIS s.initmode = 1;
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BX_DEBUG(("printer init requested"));
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}
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} else {
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if (BX_PAR_THIS s.CONTROL.init == 1) {
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BX_PAR_THIS s.CONTROL.init = 0;
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}
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}
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if ((value & 0x08) == 0x08) {
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if (BX_PAR_THIS s.CONTROL.slct_in == 0) {
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BX_PAR_THIS s.CONTROL.slct_in = 1;
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BX_DEBUG(("printer now online"));
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}
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} else {
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if (BX_PAR_THIS s.CONTROL.slct_in == 1) {
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BX_PAR_THIS s.CONTROL.slct_in = 0;
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BX_DEBUG(("printer now offline"));
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}
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}
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BX_PAR_THIS s.STATUS.slct = BX_PAR_THIS s.CONTROL.slct_in;
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if ((value & 0x10) == 0x10) {
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if (BX_PAR_THIS s.CONTROL.irq == 0) {
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BX_PAR_THIS s.CONTROL.irq = 1;
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BX_DEBUG(("irq mode selected"));
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}
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} else {
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if (BX_PAR_THIS s.CONTROL.irq == 1) {
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BX_PAR_THIS s.CONTROL.irq = 0;
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BX_DEBUG(("polling mode selected"));
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}
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}
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if ((value & 0x20) == 0x20) {
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if (BX_PAR_THIS s.CONTROL.input == 0) {
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BX_PAR_THIS s.CONTROL.input = 1;
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BX_DEBUG(("data input mode selected"));
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}
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} else {
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if (BX_PAR_THIS s.CONTROL.input == 1) {
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BX_PAR_THIS s.CONTROL.input = 0;
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BX_DEBUG(("data output mode selected"));
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}
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}
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if ((value & 0xC0) > 0) {
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BX_ERROR(("write: unsupported control bit ignored"));
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}
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}
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break;
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}
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}
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