ssc.c revision 1.1 
1/*-
2 * Copyright (c) 2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	$FreeBSD$
27 */
28#include <sys/param.h>
29#include <sys/conf.h>
30#include <sys/kernel.h>
31#include <sys/lock.h>
32#include <sys/proc.h>
33#include <sys/systm.h>
34#include <sys/tty.h>
35#include <sys/device.h>
36
37#include <machine/md_var.h>
38#include <machine/ssc.h>
39
40#include <dev/cons.h>
41
42
43#define SSC_GETCHAR			21
44#define SSC_PUTCHAR			31
45
46#define	SSC_POLL_HZ	50
47
48void sscconsattach(struct device *, struct device *, void *);
49
50static void ssccnprobe(struct consdev *);
51static void ssccninit(struct consdev *);
52static void ssccnputc(dev_t, int);
53static int  ssccngetc(dev_t);
54
55struct consdev constab[] = {
56	{ ssccnprobe, ssccninit, ssccngetc, ssccnputc, nullcnpollc,
57	  NULL, NULL, NULL, NODEV, CN_NORMAL },
58	{ NULL }
59};
60
61
62u_int64_t
63ssc(u_int64_t in0, u_int64_t in1, u_int64_t in2, u_int64_t in3, int which)
64{
65	register u_int64_t ret0 __asm("r8");
66
67	__asm __volatile("mov r15=%1\n\t"
68			 "break 0x80001"
69			 : "=r"(ret0)
70			 : "r"(which), "r"(in0), "r"(in1), "r"(in2), "r"(in3));
71	return ret0;
72}
73
74void sscconsattach(struct device *parent, struct device *self, void *aux)
75{
76}
77
78static void
79ssccnprobe(struct consdev *cp)
80{
81	cp->cn_pri = CN_INTERNAL;
82}
83
84static void
85ssccninit(struct consdev *cp)
86{
87}
88
89/* void */
90/* ssccnattach(void *arg) */
91/* { */
92/* 	static struct consdev ssccons = { */
93/* 		ssccnprobe, ssccninit, ssccngetc, ssccnputc, nullcnpollc, */
94/* 		NULL, NULL, NULL, NODEV, CN_NORMAL */
95/* 	}; */
96
97/* 	cn_tab = &ssccons; */
98/* } */
99
100static void
101ssccnputc(dev_t dev, int c)
102{
103	ssc(c, 0, 0, 0, SSC_PUTCHAR);
104}
105
106static int
107ssccngetc(dev_t dev)
108{
109	int c;
110	do {
111		c = ssc(0, 0, 0, 0, SSC_GETCHAR);
112	} while (c == 0);
113
114	return c;
115}
116
117/* XXX: integrate the rest of the ssc.c stuff from FreeBSD to plug into wsdisplay */
118
119