uart_bus_acpi.c revision 120452 
1/*
2 * Copyright (c) 2001 M. Warner Losh.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD: head/sys/dev/uart/uart_bus_acpi.c 120452 2003-09-26 05:14:56Z marcel $");
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/bus.h>
31#include <sys/conf.h>
32#include <sys/kernel.h>
33#include <sys/module.h>
34#include <machine/bus.h>
35#include <sys/rman.h>
36#include <machine/resource.h>
37
38#include <isa/isavar.h>
39
40#include <dev/uart/uart.h>
41#include <dev/uart/uart_bus.h>
42
43static int uart_acpi_probe(device_t dev);
44
45static device_method_t uart_acpi_methods[] = {
46	/* Device interface */
47	DEVMETHOD(device_probe,		uart_acpi_probe),
48	DEVMETHOD(device_attach,	uart_bus_attach),
49	DEVMETHOD(device_detach,	uart_bus_detach),
50	{ 0, 0 }
51};
52
53static driver_t uart_acpi_driver = {
54	uart_driver_name,
55	uart_acpi_methods,
56	sizeof(struct uart_softc),
57};
58
59static struct isa_pnp_id acpi_ns8250_ids[] = {
60	{0x0005d041, "Standard PC COM port"},		/* PNP0500 */
61	{0x0105d041, "16550A-compatible COM port"},	/* PNP0501 */
62	{0}
63};
64
65static int
66uart_acpi_probe(device_t dev)
67{
68	struct uart_softc *sc;
69	device_t parent;
70
71	parent = device_get_parent(dev);
72	sc = device_get_softc(dev);
73
74	if (!ISA_PNP_PROBE(parent, dev, acpi_ns8250_ids)) {
75		sc->sc_class = &uart_ns8250_class;
76		return (uart_bus_probe(dev, 0, 0, 0, 0));
77	}
78
79	/* Add checks for non-ns8250 IDs here. */
80	return (ENXIO);
81}
82
83DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0);
84