uart_bus_acpi.c revision 119815 
113687Swosch/*
213687Swosch * Copyright (c) 2001 M. Warner Losh.  All rights reserved.
313687Swosch *
415714Sache * Redistribution and use in source and binary forms, with or without
513687Swosch * modification, are permitted provided that the following conditions
613687Swosch * are met:
713842Swosch * 1. Redistributions of source code must retain the above copyright
813842Swosch *    notice, this list of conditions and the following disclaimer.
913687Swosch * 2. Redistributions in binary form must reproduce the above copyright
1015714Sache *    notice, this list of conditions and the following disclaimer in the
1115714Sache *    documentation and/or other materials provided with the distribution.
1213687Swosch *
1313687Swosch * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
1413687Swosch * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
1513687Swosch * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
1613687Swosch * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
1713687Swosch * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
1813687Swosch * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1913687Swosch * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
2013687Swosch * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
2113687Swosch * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
2213687Swosch * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
2313687Swosch */
2413687Swosch
2513687Swosch#include <sys/cdefs.h>
2613687Swosch__FBSDID("$FreeBSD: head/sys/dev/uart/uart_bus_acpi.c 119815 2003-09-06 23:13:47Z marcel $");
2713842Swosch
2813687Swosch#include <sys/param.h>
2913842Swosch#include <sys/systm.h>
3013842Swosch#include <sys/bus.h>
3113842Swosch#include <sys/conf.h>
3213842Swosch#include <sys/kernel.h>
3313687Swosch#include <sys/module.h>
3413687Swosch#include <machine/bus.h>
3513687Swosch#include <sys/rman.h>
3613842Swosch#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));
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