sio_puc.c revision 174115 
1/*-
2 * Copyright (c) 2002 JF Hay.  All rights reserved.
3 * Copyright (c) 2001 M. Warner Losh.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/dev/sio/sio_puc.c 174115 2007-11-30 21:36:12Z peter $");
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/bus.h>
32#include <sys/conf.h>
33#include <sys/kernel.h>
34#include <sys/lock.h>
35#include <sys/malloc.h>
36#include <sys/mutex.h>
37#include <sys/module.h>
38#include <sys/tty.h>
39#include <machine/bus.h>
40#include <sys/timepps.h>
41
42#include <dev/puc/puc_bus.h>
43
44#include <dev/sio/siovar.h>
45#include <dev/sio/sioreg.h>
46
47static	int	sio_puc_attach(device_t dev);
48static	int	sio_puc_probe(device_t dev);
49
50static device_method_t sio_puc_methods[] = {
51	/* Device interface */
52	DEVMETHOD(device_probe,		sio_puc_probe),
53	DEVMETHOD(device_attach,	sio_puc_attach),
54	DEVMETHOD(device_detach,	siodetach),
55
56	{ 0, 0 }
57};
58
59static driver_t sio_puc_driver = {
60	sio_driver_name,
61	sio_puc_methods,
62	0,
63};
64
65/*
66 * Don't cut and paste this to other drivers.  It is a horrible kludge
67 * which will fail to work and also be unnecessary in future versions.
68 */
69static void
70sio_puc_kludge_unit(device_t dev)
71{
72	devclass_t	dc;
73	int		err;
74	int		start;
75	int		unit;
76
77	unit = 0;
78	start = 0;
79	while (resource_int_value("sio", unit, "port", &start) == 0 &&
80	    start > 0)
81		unit++;
82	if (device_get_unit(dev) < unit) {
83		dc = device_get_devclass(dev);
84		while (devclass_get_device(dc, unit))
85			unit++;
86		device_printf(dev, "moving to sio%d\n", unit);
87		err = device_set_unit(dev, unit);	/* EVIL DO NOT COPY */
88		if (err)
89			device_printf(dev, "error moving device %d\n", err);
90	}
91}
92
93static int
94sio_puc_attach(device_t dev)
95{
96	uintptr_t rclk;
97
98	if (BUS_READ_IVAR(device_get_parent(dev), dev, PUC_IVAR_CLOCK,
99	    &rclk) != 0)
100		rclk = DEFAULT_RCLK;
101	sio_puc_kludge_unit(dev);
102	return (sioattach(dev, 0, rclk));
103}
104
105static int
106sio_puc_probe(device_t dev)
107{
108	device_t parent;
109	uintptr_t rclk, type;
110	int error;
111
112	parent = device_get_parent(dev);
113
114	if (BUS_READ_IVAR(parent, dev, PUC_IVAR_TYPE, &type))
115		return (ENXIO);
116	if (type != PUC_TYPE_SERIAL)
117		return (ENXIO);
118
119	if (BUS_READ_IVAR(parent, dev, PUC_IVAR_CLOCK, &rclk))
120		rclk = DEFAULT_RCLK;
121#ifdef PC98
122	SET_FLAG(dev, SET_IFTYPE(COM_IF_NS16550));
123#endif
124	error = sioprobe(dev, 0, rclk, 1);
125	return ((error > 0) ? error : BUS_PROBE_LOW_PRIORITY);
126}
127
128DRIVER_MODULE(sio, puc, sio_puc_driver, sio_devclass, 0, 0);
129