src/devices/dev_lpt.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_lpt.c,v 1.5 2005/11/13 00:14:09 debug Exp $
 *
 *  LPT (parallel printer) controller.
 */

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

#include "console.h"
#include "cpu.h"
#include "device.h"
#include "machine.h"
#include "memory.h"
#include "misc.h"

#include "lptreg.h"


/*  #define debug fatal  */

#define TICK_SHIFT              18
#define DEV_LPT_LENGTH          3

struct lpt_data {
        int             in_use;
        int             irqnr;
        char            *name;
        int             console_handle;

        unsigned char   data;
        unsigned char   control;
};


/*
 *  dev_lpt_tick():
 */
void dev_lpt_tick(struct cpu *cpu, void *extra)
{
        /*  struct lpt_data *d = extra;  */

        /*  TODO  */
}


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

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

        switch (relative_addr) {

        case LPT_DATA:
                if (writeflag == MEM_READ)
                        odata = d->data;
                else
                        d->data = idata;
                break;

        case LPT_STATUS:
                odata = LPS_NBSY | LPS_NACK | LPS_SELECT | LPS_NERR;
                break;

        case LPT_CONTROL:
                if (writeflag == MEM_WRITE) {
                        if (idata != d->control) {
                                if (idata & LPC_STROBE) {
                                        /*  data strobe  */
                                        console_putchar(d->console_handle,
                                            d->data);
                                }
                        }
                        d->control = idata;
                }
                break;
        }

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

        return 1;
}


/*
 *  devinit_lpt():
 */
int devinit_lpt(struct devinit *devinit)
{
        struct lpt_data *d = malloc(sizeof(struct lpt_data));
        size_t nlen;
        char *name;

        if (d == NULL) {
                fprintf(stderr, "out of memory\n");
                exit(1);
        }
        memset(d, 0, sizeof(struct lpt_data));
        d->irqnr        = devinit->irq_nr;
        d->in_use       = devinit->in_use;
        d->name         = devinit->name2 != NULL? devinit->name2 : "";
        d->console_handle =
            console_start_slave(devinit->machine, devinit->name);

        nlen = strlen(devinit->name) + 10;
        if (devinit->name2 != NULL)
                nlen += strlen(devinit->name2);
        name = malloc(nlen);
        if (name == NULL) {
                fprintf(stderr, "out of memory\n");
                exit(1);
        }
        if (devinit->name2 != NULL && devinit->name2[0])
                snprintf(name, nlen, "%s [%s]", devinit->name, devinit->name2);
        else
                snprintf(name, nlen, "%s", devinit->name);

        memory_device_register(devinit->machine->memory, name, devinit->addr,
            DEV_LPT_LENGTH, dev_lpt_access, d, DM_DEFAULT, NULL);
        machine_add_tickfunction(devinit->machine, dev_lpt_tick, d, TICK_SHIFT);

        /*
         *  NOTE:  Ugly cast into a pointer, because this is a convenient way
         *         to return the console handle to code in src/machine.c.
         */
        devinit->return_ptr = (void *)(size_t)d->console_handle;

        return 1;
}

1	/*
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	* $Id: dev_lpt.c,v 1.5 2005/11/13 00:14:09 debug Exp $
29	*
30	* LPT (parallel printer) controller.
31	*/
32
33	#include <stdio.h>
34	#include <stdlib.h>
35	#include <string.h>
36
37	#include "console.h"
38	#include "cpu.h"
39	#include "device.h"
40	#include "machine.h"
41	#include "memory.h"
42	#include "misc.h"
43
44	#include "lptreg.h"
45
46
47	/* #define debug fatal */
48
49	#define TICK_SHIFT 18
50	#define DEV_LPT_LENGTH 3
51
52	struct lpt_data {
53	int in_use;
54	int irqnr;
55	char *name;
56	int console_handle;
57
58	unsigned char data;
59	unsigned char control;
60	};
61
62
63	/*
64	* dev_lpt_tick():
65	*/
66	void dev_lpt_tick(struct cpu cpu, void extra)
67	{
68	/* struct lpt_data d = extra; /
69
70	/* TODO */
71	}
72
73
74	/*
75	* dev_lpt_access():
76	*/
77	int dev_lpt_access(struct cpu cpu, struct memory mem,
78	uint64_t relative_addr, unsigned char *data, size_t len,
79	int writeflag, void *extra)
80	{
81	uint64_t idata = 0, odata=0;
82	struct lpt_data *d = extra;
83
84	if (writeflag == MEM_WRITE)
85	idata = memory_readmax64(cpu, data, len);
86
87	switch (relative_addr) {
88
89	case LPT_DATA:
90	if (writeflag == MEM_READ)
91	odata = d->data;
92	else
93	d->data = idata;
94	break;
95
96	case LPT_STATUS:
97	odata = LPS_NBSY \| LPS_NACK \| LPS_SELECT \| LPS_NERR;
98	break;
99
100	case LPT_CONTROL:
101	if (writeflag == MEM_WRITE) {
102	if (idata != d->control) {
103	if (idata & LPC_STROBE) {
104	/* data strobe */
105	console_putchar(d->console_handle,
106	d->data);
107	}
108	}
109	d->control = idata;
110	}
111	break;
112	}
113
114	if (writeflag == MEM_READ)
115	memory_writemax64(cpu, data, len, odata);
116
117	return 1;
118	}
119
120
121	/*
122	* devinit_lpt():
123	*/
124	int devinit_lpt(struct devinit *devinit)
125	{
126	struct lpt_data *d = malloc(sizeof(struct lpt_data));
127	size_t nlen;
128	char *name;
129
130	if (d == NULL) {
131	fprintf(stderr, "out of memory\n");
132	exit(1);
133	}
134	memset(d, 0, sizeof(struct lpt_data));
135	d->irqnr = devinit->irq_nr;
136	d->in_use = devinit->in_use;
137	d->name = devinit->name2 != NULL? devinit->name2 : "";
138	d->console_handle =
139	console_start_slave(devinit->machine, devinit->name);
140
141	nlen = strlen(devinit->name) + 10;
142	if (devinit->name2 != NULL)
143	nlen += strlen(devinit->name2);
144	name = malloc(nlen);
145	if (name == NULL) {
146	fprintf(stderr, "out of memory\n");
147	exit(1);
148	}
149	if (devinit->name2 != NULL && devinit->name2[0])
150	snprintf(name, nlen, "%s [%s]", devinit->name, devinit->name2);
151	else
152	snprintf(name, nlen, "%s", devinit->name);
153
154	memory_device_register(devinit->machine->memory, name, devinit->addr,
155	DEV_LPT_LENGTH, dev_lpt_access, d, DM_DEFAULT, NULL);
156	machine_add_tickfunction(devinit->machine, dev_lpt_tick, d, TICK_SHIFT);
157
158	/*
159	* NOTE: Ugly cast into a pointer, because this is a convenient way
160	* to return the console handle to code in src/machine.c.
161	*/
162	devinit->return_ptr = (void *)(size_t)d->console_handle;
163
164	return 1;
165	}
166