1 /* $NetBSD: uart.c,v 1.2 2007/03/23 20:05:47 dogcow Exp $ */
2
3 /*-
4 * Copyright (c) 2007 Ruslan Ermilov and Vsevolod Lobko.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or
8 * without modification, are permitted provided that the following
9 * conditions are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
16 * 3. The names of the authors may not be used to endorse or promote
17 * products derived from this software without specific prior
18 * written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY
21 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
23 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
25 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
27 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
29 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
31 * OF SUCH DAMAGE.
32 *
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/time.h>
43
44 #include <sys/cons.h>
45 #include <sys/consio.h>
46
47 static cn_probe_t uart_cnprobe;
48 static cn_init_t uart_cninit;
49 static cn_term_t uart_cnterm;
50 static cn_getc_t uart_cngetc;
51 static cn_putc_t uart_cnputc;
52
53 static void
54 uart_cnprobe(struct consdev *cp)
55 {
56
57 sprintf(cp->cn_name, "uart");
58 cp->cn_pri = CN_NORMAL;
59 }
60
61 static void
62 uart_cninit(struct consdev *cp)
63 {
64
65 }
66
67
68 void
69 uart_cnputc(struct consdev *cp, int c)
70 {
71 char chr;
72
73 chr = c;
74 while ((*((volatile unsigned long *)0xb2600018)) & 0x20) ;
75 (*((volatile unsigned long *)0xb2600000)) = c;
76 while ((*((volatile unsigned long *)0xb2600018)) & 0x20) ;
77 }
78
79 int
80 uart_cngetc(struct consdev * cp)
81 {
82
83 while ((*((volatile unsigned long *)0xb2600018)) & 0x10) ;
84 return (*((volatile unsigned long *)0xb2600000)) & 0xff;
85 }
86
87 static void
88 uart_cnterm(struct consdev * cp)
89 {
90
91 }
92
93 CONSOLE_DRIVER(uart);
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