1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 M. Warner Losh <imp@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/conf.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <machine/bus.h>
37 #include <sys/rman.h>
38 #include <machine/resource.h>
39
40 #include <dev/uart/uart.h>
41 #include <dev/uart/uart_bus.h>
42 #include <dev/uart/uart_cpu_acpi.h>
43 #include <contrib/dev/acpica/include/acpi.h>
44 #include <contrib/dev/acpica/include/accommon.h>
45 #include <dev/acpica/acpivar.h>
46
47 static int uart_acpi_probe(device_t dev);
48
49 static device_method_t uart_acpi_methods[] = {
50 /* Device interface */
51 DEVMETHOD(device_probe, uart_acpi_probe),
52 DEVMETHOD(device_attach, uart_bus_attach),
53 DEVMETHOD(device_detach, uart_bus_detach),
54 DEVMETHOD(device_resume, uart_bus_resume),
55 { 0, 0 }
56 };
57
58 static driver_t uart_acpi_driver = {
59 uart_driver_name,
60 uart_acpi_methods,
61 sizeof(struct uart_softc),
62 };
63
64 static struct acpi_uart_compat_data *
65 uart_acpi_find_device(device_t dev)
66 {
67 struct acpi_uart_compat_data **cd, *cd_it;
68 ACPI_HANDLE h;
69
70 if ((h = acpi_get_handle(dev)) == NULL)
71 return (NULL);
72
73 SET_FOREACH(cd, uart_acpi_class_and_device_set) {
74 for (cd_it = *cd; cd_it->cd_hid != NULL; cd_it++) {
75 if (acpi_MatchHid(h, cd_it->cd_hid))
76 return (cd_it);
77 }
78 }
79
80 return (NULL);
81 }
82
83 static int
84 uart_acpi_probe(device_t dev)
85 {
86 struct uart_softc *sc;
87 struct acpi_uart_compat_data *cd;
88
89 sc = device_get_softc(dev);
90
91 if ((cd = uart_acpi_find_device(dev)) != NULL) {
92 sc->sc_class = cd->cd_class;
93 if (cd->cd_desc != NULL)
94 device_set_desc(dev, cd->cd_desc);
95 return (uart_bus_probe(dev, cd->cd_regshft, cd->cd_regiowidth,
96 cd->cd_rclk, 0, 0, cd->cd_quirks));
97 }
98 return (ENXIO);
99 }
100
101 DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0);
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