1/*
2 * Copyright (c) 2003 Marcel Moolenaar
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/uart/uart_cpu_amd64.c 119866 2003-09-07 21:51:03Z marcel $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33
34#include <machine/bus.h>
35
36#include <dev/uart/uart.h>
37#include <dev/uart/uart_cpu.h>
38
39bus_addr_t
40uart_cpu_busaddr(struct uart_bas *bas)
41{
42
43 return (bas->bsh);
44}
45
46int
47uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
48{
49
50 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
51}
52
53int
54uart_cpu_getdev(int devtype, struct uart_devinfo *di)
55{
56 unsigned int i, ivar;
57
58 /*
59 * Scan the hints. We only try units 0 to 3 (inclusive). This
60 * covers the ISA legacy where 4 UARTs had their resources
61 * predefined.
62 */
63 for (i = 0; i < 4; i++) {
64 if (resource_int_value("uart", i, "flags", &ivar))
65 continue;
66 if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
67 continue;
68 if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
69 continue;
70 /*
71 * We have a possible device. Make sure it's enabled and
72 * that we have an I/O port.
73 */
74 if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
75 ivar != 0)
76 continue;
77 if (resource_int_value("uart", i, "port", &ivar) != 0 ||
78 ivar == 0)
79 continue;
80 /*
81 * Got it. Fill in the instance and return it. We only have
82 * ns8250 and successors on i386.
83 */
84 di->ops = uart_ns8250_ops;
85 di->bas.bst = AMD64_BUS_SPACE_IO;
86 di->bas.bsh = ivar;
87 di->bas.regshft = 0;
88 di->bas.rclk = 0;
89 if (resource_int_value("uart", i, "baud", &ivar) != 0)
90 ivar = 0;
91 di->baudrate = ivar;
92 di->databits = 8;
93 di->stopbits = 1;
94 di->parity = UART_PARITY_NONE;
95 return (0);
96 }
97
98 return (ENXIO);
99}