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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 1.12 2007/06/17 02:05:51 debug Exp $ |
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* |
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* COMMENT: Malta (evbmips) LCD display |
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* |
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* TODO: Write output to somewhere else, not just as a debug message. |
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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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#include "maltareg.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 16 |
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#define LCD_LEN 8 |
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|
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struct malta_lcd_data { |
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uint64_t base_addr; |
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|
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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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DEVICE_TICK(malta_lcd) |
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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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|
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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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else |
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debug("?"); |
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debug("\" ]\n"); |
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|
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d->display_modified = 0; |
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} |
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|
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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 = extra; |
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uint64_t idata = 0, odata = 0; |
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int pos; |
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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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relative_addr += d->base_addr; |
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|
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switch (relative_addr) { |
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|
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS0: |
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS1: |
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS2: |
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS3: |
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS4: |
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS5: |
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS6: |
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case MALTA_ASCII_BASE + MALTA_ASCIIPOS7: |
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pos = (relative_addr - MALTA_ASCII_BASE) / 8; |
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if (writeflag == MEM_WRITE) { |
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d->display[pos] = idata; |
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d->display_modified = 1; |
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} else { |
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odata = d->display[pos]; |
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} |
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break; |
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|
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default: |
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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; |
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|
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CHECK_ALLOCATION(d = malloc(sizeof(struct malta_lcd_data))); |
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memset(d, 0, sizeof(struct malta_lcd_data)); |
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|
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d->base_addr = devinit->addr; |
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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); |
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|
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return 1; |
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} |
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|