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/* |
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* Copyright (C) 2005-2007 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_malta_lcd.c,v 1.9 2007/02/03 20:14:23 debug Exp $ |
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* |
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* Malta (evbmips) LCD thingy. Mostly a dummy device. |
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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 "cpu.h" |
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#include "device.h" |
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#include "emul.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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|
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#define DEV_MALTA_LCD_LENGTH 0x80 |
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#define MALTA_LCD_TICK_SHIFT 15 |
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#define LCD_LEN 8 |
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|
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struct malta_lcd_data { |
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int display_modified; |
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unsigned char display[LCD_LEN]; |
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}; |
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|
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|
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|
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/* |
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* dev_malta_lcd_tick(): |
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*/ |
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void dev_malta_lcd_tick(struct cpu *cpu, void *extra) |
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{ |
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struct malta_lcd_data *d = extra; |
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int i; |
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|
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if (d->display_modified == 0) |
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return; |
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if (d->display_modified == 1) { |
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d->display_modified = 2; |
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return; |
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} |
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debug("[ malta_lcd: "); |
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for (i=0; i<LCD_LEN; i++) |
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if (d->display[i] >= ' ') |
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debug("%c", d->display[i]); |
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debug(" ]\n"); |
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d->display_modified = 0; |
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} |
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|
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|
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/* |
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* dev_malta_lcd_access(): |
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*/ |
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DEVICE_ACCESS(malta_lcd) |
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{ |
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struct malta_lcd_data *d = (struct malta_lcd_data *) extra; |
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uint64_t idata = 0, odata = 0; |
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int i; |
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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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case 0x18: |
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case 0x20: |
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case 0x28: |
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case 0x30: |
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case 0x38: |
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case 0x40: |
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case 0x48: |
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case 0x50: |
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i = (relative_addr - 0x18) / 8; |
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if (writeflag == MEM_WRITE) { |
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d->display[i] = idata; |
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d->display_modified = 1; |
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} else |
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odata = d->display[i]; |
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break; |
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default:if (writeflag == MEM_WRITE) { |
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fatal("[ malta_lcd: unimplemented write to " |
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"offset 0x%x: data=0x%02x ]\n", (int) |
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relative_addr, (int)idata); |
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} else { |
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fatal("[ malta_lcd: unimplemented read from " |
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"offset 0x%x ]\n", (int)relative_addr); |
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} |
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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(malta_lcd) |
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{ |
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struct malta_lcd_data *d = malloc(sizeof(struct malta_lcd_data)); |
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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 malta_lcd_data)); |
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|
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memory_device_register(devinit->machine->memory, devinit->name, |
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devinit->addr, DEV_MALTA_LCD_LENGTH, |
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dev_malta_lcd_access, (void *)d, DM_DEFAULT, NULL); |
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|
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machine_add_tickfunction(devinit->machine, dev_malta_lcd_tick, |
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d, MALTA_LCD_TICK_SHIFT, 0.0); |
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|
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return 1; |
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} |
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