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/* |
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* Copyright (C) 2005-2006 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_lpt.c,v 1.9 2006/03/04 12:38:47 debug Exp $ |
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* |
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* LPT (parallel printer) controller. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "console.h" |
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#include "cpu.h" |
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#include "device.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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#include "lptreg.h" |
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|
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|
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/* #define debug fatal */ |
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|
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#define TICK_SHIFT 18 |
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#define DEV_LPT_LENGTH 3 |
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|
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struct lpt_data { |
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int irqnr; |
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char *name; |
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int console_handle; |
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|
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unsigned char data; |
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unsigned char control; |
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}; |
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|
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|
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/* |
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* dev_lpt_tick(): |
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*/ |
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void dev_lpt_tick(struct cpu *cpu, void *extra) |
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{ |
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/* struct lpt_data *d = extra; */ |
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|
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/* TODO */ |
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} |
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|
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|
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/* |
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* dev_lpt_access(): |
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*/ |
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DEVICE_ACCESS(lpt) |
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{ |
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uint64_t idata = 0, odata=0; |
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struct lpt_data *d = extra; |
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|
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if (writeflag == MEM_WRITE) |
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idata = memory_readmax64(cpu, data, len); |
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|
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switch (relative_addr) { |
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|
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case LPT_DATA: |
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if (writeflag == MEM_READ) |
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odata = d->data; |
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else |
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d->data = idata; |
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break; |
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|
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case LPT_STATUS: |
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odata = LPS_NBSY | LPS_NACK | LPS_SELECT | LPS_NERR; |
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break; |
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|
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case LPT_CONTROL: |
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if (writeflag == MEM_WRITE) { |
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if (idata != d->control) { |
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if (idata & LPC_STROBE) { |
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/* data strobe */ |
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console_putchar(d->console_handle, |
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d->data); |
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} |
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} |
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d->control = idata; |
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} |
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break; |
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} |
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|
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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|
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return 1; |
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} |
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|
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|
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DEVINIT(lpt) |
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{ |
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struct lpt_data *d = malloc(sizeof(struct lpt_data)); |
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size_t nlen; |
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char *name; |
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|
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if (d == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct lpt_data)); |
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d->irqnr = devinit->irq_nr; |
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d->name = devinit->name2 != NULL? devinit->name2 : ""; |
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d->console_handle = console_start_slave(devinit->machine, devinit->name, |
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CONSOLE_OUTPUT_ONLY); |
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|
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nlen = strlen(devinit->name) + 10; |
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if (devinit->name2 != NULL) |
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nlen += strlen(devinit->name2); |
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name = malloc(nlen); |
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if (name == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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if (devinit->name2 != NULL && devinit->name2[0]) |
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snprintf(name, nlen, "%s [%s]", devinit->name, devinit->name2); |
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else |
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snprintf(name, nlen, "%s", devinit->name); |
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|
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memory_device_register(devinit->machine->memory, name, devinit->addr, |
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DEV_LPT_LENGTH, dev_lpt_access, d, DM_DEFAULT, NULL); |
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machine_add_tickfunction(devinit->machine, dev_lpt_tick, d, |
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TICK_SHIFT, 0.0); |
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|
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/* |
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* NOTE: Ugly cast into a pointer, because this is a convenient way |
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* to return the console handle to code in src/machine.c. |
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*/ |
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devinit->return_ptr = (void *)(size_t)d->console_handle; |
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|
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return 1; |
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} |
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