xref: /freebsd/sys/dev/uart/uart_bus_acpi.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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("$FreeBSD$");
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 
43 static int uart_acpi_probe(device_t dev);
44 
45 static 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 
53 static driver_t uart_acpi_driver = {
54 	uart_driver_name,
55 	uart_acpi_methods,
56 	sizeof(struct uart_softc),
57 };
58 
59 static 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 
65 static int
66 uart_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 
83 DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0);
84