1 /* $NetBSD: ar_console.c,v 1.2 2011/07/10 06:26:02 matt Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * This file implement an Atheros dependent early console.
34 */
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: ar_console.c,v 1.2 2011/07/10 06:26:02 matt Exp $");
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/termios.h>
42
43 #include <dev/cons.h>
44
45 #include <mips/cache.h>
46 #include <mips/locore.h>
47 #include <mips/cpuregs.h>
48
49 #include <mips/atheros/include/platform.h>
50 #include <mips/atheros/include/arbusvar.h>
51
52 #include <mips/locore.h>
53 #include "com.h"
54
55 #include <dev/ic/ns16450reg.h>
56 #include <dev/ic/comreg.h>
57 #include <dev/ic/comvar.h>
58
59 void
atheros_consinit(void)60 atheros_consinit(void)
61 {
62 /*
63 * Everything related to console initialization is done
64 * in mach_init().
65 */
66 #if NCOM > 0
67 /* Setup polled serial for early console I/O */
68 /* XXX: pass in CONSPEED? */
69 com_arbus_cnattach(platformsw->apsw_uart0_base,
70 atheros_get_uart_freq());
71 #else
72 panic("Not configured to use serial console!\n");
73 /* not going to see that message now, are we? */
74 #endif
75 }
76
77 /*
78 * Early console support.
79 */
80 static void
earlycons_putc(dev_t dev,int c)81 earlycons_putc(dev_t dev, int c)
82 {
83 volatile uint32_t * const uart =
84 (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
85
86 while (!(uart[com_lsr] & htobe32(LSR_TXRDY)))
87 continue;
88
89 uart[com_data] = htobe32(c);
90 }
91
92 static int
earlycons_getc(dev_t dev)93 earlycons_getc(dev_t dev)
94 {
95 volatile uint32_t * const uart =
96 (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
97
98 while (!(uart[com_lsr] & htobe32(LSR_RXRDY)))
99 continue;
100
101 return (uint8_t) be32toh(uart[com_data]);
102 }
103
104 static void
earlycons_flush(dev_t dev)105 earlycons_flush(dev_t dev)
106 {
107 volatile uint32_t * const uart =
108 (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
109
110 while (!(uart[com_lsr] & htobe32(LSR_TSRE)))
111 continue;
112 }
113
114
115 void
atheros_early_consinit(void)116 atheros_early_consinit(void)
117 {
118 static struct consdev earlycons_cn = {
119 .cn_probe = NULL,
120 .cn_init = NULL,
121 .cn_getc = earlycons_getc,
122 .cn_putc = earlycons_putc,
123 .cn_pollc = nullcnpollc,
124 .cn_bell = NULL,
125 .cn_halt = NULL,
126 .cn_flush = earlycons_flush,
127 .cn_dev = makedev(0, 0),
128 .cn_pri = CN_DEAD,
129 };
130
131 cn_tab = &earlycons_cn;
132 }
133