src/devices/dev_malta_lcd.c

/*
 *  Copyright (C) 2005  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE   
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *   
 *
 *  $Id: dev_malta_lcd.c,v 1.4 2005/11/13 00:14:09 debug Exp $
 *
 *  Malta (evbmips) LCD thingy. Mostly a dummy device.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "cpu.h"
#include "device.h"
#include "devices.h"
#include "emul.h"
#include "machine.h"
#include "memory.h"
#include "misc.h"


#define DEV_MALTA_LCD_LENGTH            0x80
#define MALTA_LCD_TICK_SHIFT            15
#define LCD_LEN                         8

struct malta_lcd_data {
        int             display_modified;
        unsigned char   display[LCD_LEN];
};


/*
 *  dev_malta_lcd_tick():
 */     
void dev_malta_lcd_tick(struct cpu *cpu, void *extra)
{ 
        struct malta_lcd_data *d = extra;
        int i;

        if (d->display_modified == 0)
                return;
        if (d->display_modified == 1) {
                d->display_modified = 2;
                return;
        }
        debug("[ malta_lcd:  ");
        for (i=0; i<LCD_LEN; i++)
                if (d->display[i] >= ' ')
                        debug("%c", d->display[i]);
        debug("  ]\n");
        d->display_modified = 0;
}


/*
 *  dev_malta_lcd_access():
 */
int dev_malta_lcd_access(struct cpu *cpu, struct memory *mem,
        uint64_t relative_addr, unsigned char *data, size_t len,
        int writeflag, void *extra)
{
        struct malta_lcd_data *d = (struct malta_lcd_data *) extra;
        uint64_t idata = 0, odata = 0;
        int i;

        if (writeflag == MEM_WRITE)
                idata = memory_readmax64(cpu, data, len);

        switch (relative_addr) {
        case 0x18:
        case 0x20:
        case 0x28:
        case 0x30:
        case 0x38:
        case 0x40:
        case 0x48:
        case 0x50:
                i = (relative_addr - 0x18) / 8;
                if (writeflag == MEM_WRITE) {
                        d->display[i] = idata;
                        d->display_modified = 1;
                } else
                        odata = d->display[i];
                break;
        default:if (writeflag == MEM_WRITE) {
                        fatal("[ malta_lcd: unimplemented write to "
                            "offset 0x%x: data=0x%02x ]\n", (int)
                            relative_addr, (int)idata);
                } else {
                        fatal("[ malta_lcd: unimplemented read from "
                            "offset 0x%x ]\n", (int)relative_addr);
                }
        }

        if (writeflag == MEM_READ)
                memory_writemax64(cpu, data, len, odata);

        return 1;
}


/*
 *  devinit_malta_lcd():
 */
int devinit_malta_lcd(struct devinit *devinit)
{
        struct malta_lcd_data *d = malloc(sizeof(struct malta_lcd_data));

        if (d == NULL) {
                fprintf(stderr, "out of memory\n");
                exit(1);
        }
        memset(d, 0, sizeof(struct malta_lcd_data));

        memory_device_register(devinit->machine->memory, devinit->name,
            devinit->addr, DEV_MALTA_LCD_LENGTH,
            dev_malta_lcd_access, (void *)d, DM_DEFAULT, NULL);

        machine_add_tickfunction(devinit->machine, dev_malta_lcd_tick,
            d, MALTA_LCD_TICK_SHIFT);

        return 1;
}

1	dpavlin	10	/*
2			* Copyright (C) 2005 Anders Gavare. All rights reserved.
3			*
4			* Redistribution and use in source and binary forms, with or without
5			* modification, are permitted provided that the following conditions are met:
6			*
7			* 1. Redistributions of source code must retain the above copyright
8			* notice, this list of conditions and the following disclaimer.
9			* 2. Redistributions in binary form must reproduce the above copyright
10			* notice, this list of conditions and the following disclaimer in the
11			* documentation and/or other materials provided with the distribution.
12			* 3. The name of the author may not be used to endorse or promote products
13			* derived from this software without specific prior written permission.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*
27			*
28	dpavlin	20	* $Id: dev_malta_lcd.c,v 1.4 2005/11/13 00:14:09 debug Exp $
29	dpavlin	10	*
30	dpavlin	12	* Malta (evbmips) LCD thingy. Mostly a dummy device.
31	dpavlin	10	*/
32
33			#include <stdio.h>
34			#include <stdlib.h>
35			#include <string.h>
36
37			#include "cpu.h"
38			#include "device.h"
39			#include "devices.h"
40			#include "emul.h"
41			#include "machine.h"
42			#include "memory.h"
43			#include "misc.h"
44
45
46			#define DEV_MALTA_LCD_LENGTH 0x80
47			#define MALTA_LCD_TICK_SHIFT 15
48			#define LCD_LEN 8
49
50			struct malta_lcd_data {
51			int display_modified;
52			unsigned char display[LCD_LEN];
53			};
54
55
56
57			/*
58			* dev_malta_lcd_tick():
59			*/
60			void dev_malta_lcd_tick(struct cpu cpu, void extra)
61			{
62			struct malta_lcd_data *d = extra;
63			int i;
64
65			if (d->display_modified == 0)
66			return;
67			if (d->display_modified == 1) {
68			d->display_modified = 2;
69			return;
70			}
71	dpavlin	12	debug("[ malta_lcd: ");
72	dpavlin	10	for (i=0; i<LCD_LEN; i++)
73			if (d->display[i] >= ' ')
74	dpavlin	12	debug("%c", d->display[i]);
75			debug(" ]\n");
76	dpavlin	10	d->display_modified = 0;
77			}
78
79
80			/*
81			* dev_malta_lcd_access():
82			*/
83			int dev_malta_lcd_access(struct cpu cpu, struct memory mem,
84			uint64_t relative_addr, unsigned char *data, size_t len,
85			int writeflag, void *extra)
86			{
87			struct malta_lcd_data d = (struct malta_lcd_data ) extra;
88			uint64_t idata = 0, odata = 0;
89			int i;
90
91	dpavlin	18	if (writeflag == MEM_WRITE)
92			idata = memory_readmax64(cpu, data, len);
93	dpavlin	10
94			switch (relative_addr) {
95			case 0x18:
96			case 0x20:
97			case 0x28:
98			case 0x30:
99			case 0x38:
100			case 0x40:
101			case 0x48:
102			case 0x50:
103			i = (relative_addr - 0x18) / 8;
104			if (writeflag == MEM_WRITE) {
105			d->display[i] = idata;
106			d->display_modified = 1;
107			} else
108			odata = d->display[i];
109			break;
110			default:if (writeflag == MEM_WRITE) {
111			fatal("[ malta_lcd: unimplemented write to "
112			"offset 0x%x: data=0x%02x ]\n", (int)
113			relative_addr, (int)idata);
114			} else {
115			fatal("[ malta_lcd: unimplemented read from "
116			"offset 0x%x ]\n", (int)relative_addr);
117			}
118			}
119
120			if (writeflag == MEM_READ)
121			memory_writemax64(cpu, data, len, odata);
122
123			return 1;
124			}
125
126
127			/*
128			* devinit_malta_lcd():
129			*/
130			int devinit_malta_lcd(struct devinit *devinit)
131			{
132			struct malta_lcd_data *d = malloc(sizeof(struct malta_lcd_data));
133
134			if (d == NULL) {
135			fprintf(stderr, "out of memory\n");
136			exit(1);
137			}
138			memset(d, 0, sizeof(struct malta_lcd_data));
139
140			memory_device_register(devinit->machine->memory, devinit->name,
141			devinit->addr, DEV_MALTA_LCD_LENGTH,
142	dpavlin	20	dev_malta_lcd_access, (void *)d, DM_DEFAULT, NULL);
143	dpavlin	10
144			machine_add_tickfunction(devinit->machine, dev_malta_lcd_tick,
145			d, MALTA_LCD_TICK_SHIFT);
146
147			return 1;
148			}
149