scd_isa.c revision 127135 
1/*
2 */
3
4#include <sys/cdefs.h>
5__FBSDID("$FreeBSD: head/sys/dev/scd/scd_isa.c 127135 2004-03-17 17:50:55Z njl $");
6
7#include <sys/param.h>
8#include <sys/systm.h>
9#include <sys/kernel.h>
10#include <sys/module.h>
11#include <sys/conf.h>
12#include <sys/fcntl.h>
13#include <sys/bio.h>
14#include <sys/cdio.h>
15#include <sys/bus.h>
16
17#include <sys/mutex.h>
18
19#include <machine/bus_pio.h>
20#include <machine/bus.h>
21#include <machine/resource.h>
22#include <sys/rman.h>
23
24#include <isa/isavar.h>
25
26#include <dev/scd/scdreg.h>
27#include <dev/scd/scdvar.h>
28
29static int	scd_isa_probe	(device_t);
30static int	scd_isa_attach	(device_t);
31static int	scd_isa_detach	(device_t);
32
33static int	scd_alloc_resources	(device_t);
34static void	scd_release_resources	(device_t);
35
36static int
37scd_isa_probe (device_t dev)
38{
39	struct scd_softc *	sc;
40	int			error;
41
42	/* No pnp support */
43	if (isa_get_vendorid(dev))
44		return (ENXIO);
45
46	/* IO port must be configured. */
47	if (bus_get_resource_start(dev, SYS_RES_IOPORT, 0) == 0)
48		return (ENXIO);
49
50	sc = device_get_softc(dev);
51	sc->dev = dev;
52	sc->port_rid = 0;
53	sc->port_type = SYS_RES_IOPORT;
54	error = scd_alloc_resources(dev);
55	if (error)
56		goto fail;
57
58	error = scd_probe(sc);
59	if (error) {
60		device_printf(dev, "Probe failed.\n");
61		goto fail;
62	}
63
64	device_set_desc(dev, sc->data.name);
65
66fail:
67	scd_release_resources(dev);
68	return (error);
69}
70
71static int
72scd_isa_attach (device_t dev)
73{
74	struct scd_softc *	sc;
75	int			error;
76
77	sc = device_get_softc(dev);
78	error = 0;
79
80	sc->dev = dev;
81	sc->port_rid = 0;
82	sc->port_type = SYS_RES_IOPORT;
83	error = scd_alloc_resources(dev);
84	if (error)
85		goto fail;
86
87	error = scd_probe(sc);
88	if (error) {
89		device_printf(dev, "Re-Probe failed.\n");
90		goto fail;
91	}
92
93	error = scd_attach(sc);
94	if (error) {
95		device_printf(dev, "Attach failed.\n");
96		goto fail;
97	}
98
99	return (0);
100fail:
101	scd_release_resources(dev);
102	return (error);
103}
104
105static int
106scd_isa_detach (device_t dev)
107{
108	struct scd_softc *	sc;
109	int			error;
110
111	sc = device_get_softc(dev);
112	error = 0;
113
114	destroy_dev(sc->scd_dev_t);
115
116	scd_release_resources(dev);
117
118	return (error);
119}
120
121static int
122scd_alloc_resources (device_t dev)
123{
124	struct scd_softc *	sc;
125	int			error;
126
127	sc = device_get_softc(dev);
128	error = 0;
129
130	if (sc->port_type) {
131		sc->port = bus_alloc_resource_any(dev, sc->port_type,
132				&sc->port_rid, RF_ACTIVE);
133		if (sc->port == NULL) {
134			device_printf(dev, "Unable to allocate PORT resource.\n");
135			error = ENOMEM;
136			goto bad;
137		}
138		sc->port_bst = rman_get_bustag(sc->port);
139		sc->port_bsh = rman_get_bushandle(sc->port);
140	}
141
142	mtx_init(&sc->mtx, device_get_nameunit(dev),
143		"Interrupt lock", MTX_DEF | MTX_RECURSE);
144
145bad:
146	return (error);
147}
148
149void
150scd_release_resources (device_t dev)
151{
152	struct scd_softc *	sc;
153
154	sc = device_get_softc(dev);
155
156	if (sc->port) {
157		bus_release_resource(dev, sc->port_type, sc->port_rid, sc->port);
158		sc->port_bst = 0;
159		sc->port_bsh = 0;
160	}
161
162	if (mtx_initialized(&sc->mtx) != 0)
163		mtx_destroy(&sc->mtx);
164
165	return;
166}
167
168static device_method_t scd_isa_methods[] = {
169	DEVMETHOD(device_probe,         scd_isa_probe),
170	DEVMETHOD(device_attach,        scd_isa_attach),
171	DEVMETHOD(device_detach,        scd_isa_detach),
172
173	{ 0, 0 }
174};
175
176static driver_t scd_isa_driver = {
177	"scd",
178	scd_isa_methods,
179	sizeof(struct scd_softc)
180};
181
182static devclass_t	scd_devclass;
183
184DRIVER_MODULE(scd, isa, scd_isa_driver, scd_devclass, NULL, 0);
185