ofw_console.c revision 183181 
1/* $NetBSD: prom.c,v 1.3 1997/09/06 14:03:58 drochner Exp $ */
2
3/*-
4 * Mach Operating System
5 * Copyright (c) 1992 Carnegie Mellon University
6 * All Rights Reserved.
7 *
8 * Permission to use, copy, modify and distribute this software and its
9 * documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
21 *  School of Computer Science
22 *  Carnegie Mellon University
23 *  Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie Mellon
26 * the rights to redistribute these changes.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/boot/ofw/libofw/ofw_console.c 183181 2008-09-19 11:00:14Z sobomax $");
31
32#include <sys/types.h>
33
34#include "bootstrap.h"
35#include "openfirm.h"
36
37static void ofw_cons_probe(struct console *cp);
38static int ofw_cons_init(int);
39void ofw_cons_putchar(int);
40int ofw_cons_getchar(void);
41int ofw_cons_poll(void);
42
43static ihandle_t stdin;
44static ihandle_t stdout;
45#ifdef POWERMAC_SCREEN_HACK
46static ihandle_t stdout1;
47static int do_stdout1 = 0;
48#endif
49
50struct console ofwconsole = {
51	"ofw",
52	"Open Firmware console",
53	0,
54	ofw_cons_probe,
55	ofw_cons_init,
56	ofw_cons_putchar,
57	ofw_cons_getchar,
58	ofw_cons_poll,
59};
60
61static void
62ofw_cons_probe(struct console *cp)
63{
64#ifdef POWERMAC_SCREEN_HACK
65	char path1[128], path2[128];
66#endif
67
68	OF_getprop(chosen, "stdin", &stdin, sizeof(stdin));
69	OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
70#ifdef POWERMAC_SCREEN_HACK
71	stdout1 = OF_open("screen");
72	if (stdout1 != -1) {
73		if (OF_instance_to_path(stdout, path1, sizeof(path1)) == -1)
74			path1[0] = '\0';
75		if (OF_instance_to_path(stdout1, path2, sizeof(path2)) == -1)
76			path2[0] = '\0';
77		if (strcmp(path1, path2) == 0) {
78			OF_close(stdout1);
79		} else {
80			do_stdout1 = 1;
81		}
82	}
83#endif
84	cp->c_flags |= C_PRESENTIN|C_PRESENTOUT;
85}
86
87static int
88ofw_cons_init(int arg)
89{
90	return 0;
91}
92
93void
94ofw_cons_putchar(int c)
95{
96	char cbuf;
97
98	if (c == '\n') {
99		cbuf = '\r';
100		OF_write(stdout, &cbuf, 1);
101#ifdef POWERMAC_SCREEN_HACK
102		if (do_stdout1 != 0)
103			OF_write(stdout1, &cbuf, 1);
104#endif
105	}
106
107	cbuf = c;
108	OF_write(stdout, &cbuf, 1);
109#ifdef POWERMAC_SCREEN_HACK
110	if (do_stdout1 != 0)
111		OF_write(stdout1, &cbuf, 1);
112#endif
113}
114
115static int saved_char = -1;
116
117int
118ofw_cons_getchar()
119{
120	unsigned char ch = '\0';
121	int l;
122
123	if (saved_char != -1) {
124		l = saved_char;
125		saved_char = -1;
126		return l;
127	}
128
129	if (OF_read(stdin, &ch, 1) > 0)
130		return (ch);
131
132	return (-1);
133}
134
135int
136ofw_cons_poll()
137{
138	unsigned char ch;
139
140	if (saved_char != -1)
141		return 1;
142
143	if (OF_read(stdin, &ch, 1) > 0) {
144		saved_char = ch;
145		return 1;
146	}
147
148	return 0;
149}
150