sio_puc.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002 JF Hay.  All rights reserved.
5 * Copyright (c) 2001 M. Warner Losh.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: stable/11/sys/dev/sio/sio_puc.c 330897 2018-03-14 03:19:51Z eadler $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/bus.h>
34#include <sys/conf.h>
35#include <sys/kernel.h>
36#include <sys/lock.h>
37#include <sys/malloc.h>
38#include <sys/mutex.h>
39#include <sys/module.h>
40#include <sys/tty.h>
41#include <machine/bus.h>
42#include <sys/timepps.h>
43
44#include <dev/puc/puc_bus.h>
45
46#include <dev/sio/siovar.h>
47#include <dev/sio/sioreg.h>
48
49static	int	sio_puc_attach(device_t dev);
50static	int	sio_puc_probe(device_t dev);
51
52static device_method_t sio_puc_methods[] = {
53	/* Device interface */
54	DEVMETHOD(device_probe,		sio_puc_probe),
55	DEVMETHOD(device_attach,	sio_puc_attach),
56	DEVMETHOD(device_detach,	siodetach),
57
58	{ 0, 0 }
59};
60
61static driver_t sio_puc_driver = {
62	sio_driver_name,
63	sio_puc_methods,
64	0,
65};
66
67static int
68sio_puc_attach(device_t dev)
69{
70	uintptr_t rclk;
71
72	if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_CLOCK,
73	    &rclk) != 0)
74		rclk = DEFAULT_RCLK;
75	return (sioattach(dev, 0, rclk));
76}
77
78static int
79sio_puc_probe(device_t dev)
80{
81	device_t parent;
82	uintptr_t rclk, type;
83	int error;
84
85	parent = device_get_parent(dev);
86
87	if (BUS_READ_IVAR(parent, dev, PUC_IVAR_TYPE, &type))
88		return (ENXIO);
89	if (type != PUC_TYPE_SERIAL)
90		return (ENXIO);
91
92	if (BUS_READ_IVAR(parent, dev, PUC_IVAR_CLOCK, &rclk))
93		rclk = DEFAULT_RCLK;
94#ifdef PC98
95	SET_FLAG(dev, SET_IFTYPE(COM_IF_NS16550));
96#endif
97	error = sioprobe(dev, 0, rclk, 1);
98	return ((error > 0) ? error : BUS_PROBE_LOW_PRIORITY);
99}
100
101DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, 0, 0);
102