uart_bus_acpi.c revision 315367 
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: stable/11/sys/dev/uart/uart_bus_acpi.c 315367 2017-03-16 03:49:06Z ian $");
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	DEVMETHOD(device_resume,	uart_bus_resume),
51	{ 0, 0 }
52};
53
54static driver_t uart_acpi_driver = {
55	uart_driver_name,
56	uart_acpi_methods,
57	sizeof(struct uart_softc),
58};
59
60static struct isa_pnp_id acpi_ns8250_ids[] = {
61	{0x0005d041, "Standard PC COM port"},		/* PNP0500 */
62	{0x0105d041, "16550A-compatible COM port"},	/* PNP0501 */
63	{0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */
64	{0x1005d041, "Generic IRDA-compatible device"},	/* PNP0510 */
65	{0x1105d041, "Generic IRDA-compatible device"},	/* PNP0511 */
66	{0x04f0235c, "Wacom Tablet PC Screen"},		/* WACF004 */
67	{0x0ef0235c, "Wacom Tablet PC Screen 00e"},	/* WACF00e */
68	{0xe502aa1a, "Wacom Tablet at FuS Lifebook T"},	/* FUJ02E5 */
69	{0}
70};
71
72static int
73uart_acpi_probe(device_t dev)
74{
75	struct uart_softc *sc;
76	device_t parent;
77
78	parent = device_get_parent(dev);
79	sc = device_get_softc(dev);
80
81	if (!ISA_PNP_PROBE(parent, dev, acpi_ns8250_ids)) {
82		sc->sc_class = &uart_ns8250_class;
83		return (uart_bus_probe(dev, 0, 0, 0, 0));
84	}
85
86	/* Add checks for non-ns8250 IDs here. */
87	return (ENXIO);
88}
89
90DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0);
91