1/*-
2 * Copyright (c) 2008 TAKAHASHI Yoshihiro
3 * Copyright (c) 2003 M. Warner Losh, Marcel Moolenaar
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
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 copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/bus.h>
34
35#include <machine/bus.h>
36
37#include <dev/uart/uart.h>
38#include <dev/uart/uart_cpu.h>
39
40bus_space_tag_t uart_bus_space_io = X86_BUS_SPACE_IO;
41bus_space_tag_t uart_bus_space_mem = X86_BUS_SPACE_MEM;
42
43static struct {
44	u_long iobase;
45	struct uart_class *class;
46} uart_pc98_devs[] = {
47	{ 0x238, &uart_ns8250_class },
48	{ 0, NULL }
49};
50
51struct uart_class *
52uart_pc98_getdev(u_long port)
53{
54	int i;
55
56	for (i = 0; uart_pc98_devs[i].iobase; i++) {
57		if (port == uart_pc98_devs[i].iobase)
58			return (uart_pc98_devs[i].class);
59	}
60	return (NULL);
61}
62
63int
64uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
65{
66
67	if (bus_space_compare(b1->bst, b1->bsh, b2->bst, b2->bsh) == 0)
68		return (1);
69
70	return (0);
71}
72
73int
74uart_cpu_getdev(int devtype, struct uart_devinfo *di)
75{
76	struct uart_class *class;
77	unsigned int i, ivar;
78
79	class = &uart_ns8250_class;
80	if (class == NULL)
81		return (ENXIO);
82
83	/* Check the environment. */
84	if (uart_getenv(devtype, di, class) == 0)
85		return (0);
86
87	/*
88	 * There is a serial port on all pc98 hardware.  It is 8251 or
89	 * an enhance version of that.  Some pc98 have the second serial
90	 * port which is 16550A compatible.
91	 */
92	for (i = 0; i < 2; i++) {
93		if (resource_int_value("uart", i, "flags", &ivar))
94			continue;
95		if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
96			continue;
97		if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
98			continue;
99		/*
100		 * We have a possible device. Make sure it's enabled and
101		 * that we have an I/O port.
102		 */
103		if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
104		    ivar != 0)
105			continue;
106		if (resource_int_value("uart", i, "port", &ivar) != 0 ||
107		    ivar == 0)
108			continue;
109
110		class = uart_pc98_getdev(ivar);
111		if (class == NULL)
112			continue;
113
114		di->ops = uart_getops(class);
115		di->bas.chan = 0;
116		di->bas.bst = uart_bus_space_io;
117		if (bus_space_map(di->bas.bst, ivar, uart_getrange(class), 0,
118		    &di->bas.bsh) != 0)
119			continue;
120		di->bas.regshft = 0;
121		di->bas.rclk = 0;
122		if (resource_int_value("uart", i, "baud", &ivar) != 0)
123			ivar = 0;
124		di->baudrate = ivar;
125		di->databits = 8;
126		di->stopbits = 1;
127		di->parity = UART_PARITY_NONE;
128		return (0);
129	}
130
131	return (ENXIO);
132}
133