xref: /freebsd/stand/uboot/uboot_console.c (revision 7ab1a32cd43cbae61ad4dd435d6a482bbf61cb52)
1 /*-
2  * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com>
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 
27 #include <stand.h>
28 #include "bootstrap.h"
29 #include "glue.h"
30 
31 int console;
32 
33 static void uboot_cons_probe(struct console *cp);
34 static int uboot_cons_init(int);
35 static void uboot_cons_putchar(int);
36 static int uboot_cons_getchar(void);
37 static int uboot_cons_poll(void);
38 
39 struct console uboot_console = {
40 	.c_name = "uboot",
41 	.c_desc = "U-Boot console",
42 	.c_probe = uboot_cons_probe,
43 	.c_init = uboot_cons_init,
44 	.c_out = uboot_cons_putchar,
45 	.c_in = uboot_cons_getchar,
46 	.c_ready = uboot_cons_poll,
47 };
48 
49 static void
50 uboot_cons_probe(struct console *cp)
51 {
52 
53 	cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
54 }
55 
56 static int
57 uboot_cons_init(int arg)
58 {
59 
60 	return (0);
61 }
62 
63 static void
64 uboot_cons_putchar(int c)
65 {
66 
67 	if (c == '\n')
68 		ub_putc('\r');
69 
70 	ub_putc(c);
71 }
72 
73 static int
74 uboot_cons_getchar(void)
75 {
76 
77 	return (ub_getc());
78 }
79 
80 static int
81 uboot_cons_poll(void)
82 {
83 
84 	return (ub_tstc());
85 }
86