uart_bus_acpi.c revision 340145 
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 340145 2018-11-04 23:28:56Z mmacy $");
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 <dev/uart/uart.h>
39#include <dev/uart/uart_bus.h>
40#include <dev/uart/uart_cpu_acpi.h>
41
42#include <contrib/dev/acpica/include/acpi.h>
43#include <contrib/dev/acpica/include/accommon.h>
44#include <dev/acpica/acpivar.h>
45
46static int uart_acpi_probe(device_t dev);
47
48static device_method_t uart_acpi_methods[] = {
49	/* Device interface */
50	DEVMETHOD(device_probe,		uart_acpi_probe),
51	DEVMETHOD(device_attach,	uart_bus_attach),
52	DEVMETHOD(device_detach,	uart_bus_detach),
53	DEVMETHOD(device_resume,	uart_bus_resume),
54	{ 0, 0 }
55};
56
57static driver_t uart_acpi_driver = {
58	uart_driver_name,
59	uart_acpi_methods,
60	sizeof(struct uart_softc),
61};
62
63static struct acpi_uart_compat_data *
64uart_acpi_find_device(device_t dev)
65{
66	struct acpi_uart_compat_data **cd, *cd_it;
67	ACPI_HANDLE h;
68
69	if ((h = acpi_get_handle(dev)) == NULL)
70		return (NULL);
71
72	SET_FOREACH(cd, uart_acpi_class_and_device_set) {
73		for (cd_it = *cd; cd_it->cd_hid != NULL; cd_it++) {
74			if (acpi_MatchHid(h, cd_it->cd_hid))
75				return (cd_it);
76		}
77	}
78
79	return (NULL);
80}
81
82static int
83uart_acpi_probe(device_t dev)
84{
85	struct uart_softc *sc;
86	struct acpi_uart_compat_data *cd;
87
88	sc = device_get_softc(dev);
89
90	if ((cd = uart_acpi_find_device(dev)) != NULL) {
91		sc->sc_class = cd->cd_class;
92		if (cd->cd_desc != NULL)
93			device_set_desc(dev, cd->cd_desc);
94		return (uart_bus_probe(dev, cd->cd_regshft, cd->cd_regiowidth,
95			cd->cd_rclk, 0, 0, cd->cd_quirks));
96	}
97	return (ENXIO);
98}
99
100DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0);
101