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smb.c (83366) smb.c (93023)
1/*-
1/*-
2 * Copyright (c) 1998 Nicolas Souchu
2 * Copyright (c) 1998, 2001 Nicolas Souchu
3 * 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

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18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
3 * 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

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18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/smbus/smb.c 83366 2001-09-12 08:38:13Z julian $
26 * $FreeBSD: head/sys/dev/smbus/smb.c 93023 2002-03-23 15:49:15Z nsouch $
27 *
28 */
29#include <sys/param.h>
30#include <sys/kernel.h>
31#include <sys/systm.h>
32#include <sys/module.h>
33#include <sys/bus.h>
34#include <sys/conf.h>

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41#include <machine/smb.h>
42
43#include "smbus_if.h"
44
45#define BUFSIZE 1024
46
47struct smb_softc {
48
27 *
28 */
29#include <sys/param.h>
30#include <sys/kernel.h>
31#include <sys/systm.h>
32#include <sys/module.h>
33#include <sys/bus.h>
34#include <sys/conf.h>

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41#include <machine/smb.h>
42
43#include "smbus_if.h"
44
45#define BUFSIZE 1024
46
47struct smb_softc {
48
49 int sc_addr; /* address on smbus */
50 int sc_count; /* >0 if device opened */
49 int sc_count; /* >0 if device opened */
51
52 char *sc_cp; /* output buffer pointer */
53
54 char sc_buffer[BUFSIZE]; /* output buffer */
55 char sc_inbuf[BUFSIZE]; /* input buffer */
50 dev_t sc_devnode;
56};
57
58#define IIC_SOFTC(unit) \
59 ((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
60
61#define IIC_DEVICE(unit) \
62 (devclass_get_device(smb_devclass, (unit)))
63
64static int smb_probe(device_t);
65static int smb_attach(device_t);
51};
52
53#define IIC_SOFTC(unit) \
54 ((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
55
56#define IIC_DEVICE(unit) \
57 (devclass_get_device(smb_devclass, (unit)))
58
59static int smb_probe(device_t);
60static int smb_attach(device_t);
61static int smb_detach(device_t);
62static void smb_identify(driver_t *driver, device_t parent);
66
67static devclass_t smb_devclass;
68
69static device_method_t smb_methods[] = {
70 /* device interface */
63
64static devclass_t smb_devclass;
65
66static device_method_t smb_methods[] = {
67 /* device interface */
68 DEVMETHOD(device_identify, smb_identify),
71 DEVMETHOD(device_probe, smb_probe),
72 DEVMETHOD(device_attach, smb_attach),
69 DEVMETHOD(device_probe, smb_probe),
70 DEVMETHOD(device_attach, smb_attach),
71 DEVMETHOD(device_detach, smb_detach),
73
74 /* smbus interface */
75 DEVMETHOD(smbus_intr, smbus_generic_intr),
76
77 { 0, 0 }
78};
79
80static driver_t smb_driver = {

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101 /* strategy */ nostrategy,
102 /* name */ "smb",
103 /* maj */ CDEV_MAJOR,
104 /* dump */ nodump,
105 /* psize */ nopsize,
106 /* flags */ 0,
107};
108
72
73 /* smbus interface */
74 DEVMETHOD(smbus_intr, smbus_generic_intr),
75
76 { 0, 0 }
77};
78
79static driver_t smb_driver = {

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100 /* strategy */ nostrategy,
101 /* name */ "smb",
102 /* maj */ CDEV_MAJOR,
103 /* dump */ nodump,
104 /* psize */ nopsize,
105 /* flags */ 0,
106};
107
109/*
110 * smbprobe()
111 */
108static void
109smb_identify(driver_t *driver, device_t parent)
110{
111 BUS_ADD_CHILD(parent, 0, "smb", 0);
112}
113
112static int
113smb_probe(device_t dev)
114{
114static int
115smb_probe(device_t dev)
116{
115 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
117 device_set_desc(dev, "SMBus generic I/O");
116
118
117 sc->sc_addr = smbus_get_addr(dev);
118
119 /* XXX detect chip with start/stop conditions */
120
121 return (0);
122}
123
119 return (0);
120}
121
124/*
125 * smbattach()
126 */
127static int
128smb_attach(device_t dev)
129{
122static int
123smb_attach(device_t dev)
124{
130 make_dev(&smb_cdevsw, device_get_unit(dev), /* XXX cleanup */
125 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
126
127 if (!sc)
128 return (ENOMEM);
129
130 bzero(sc, sizeof(struct smb_softc *));
131
132 sc->sc_devnode = make_dev(&smb_cdevsw, device_get_unit(dev),
131 UID_ROOT, GID_WHEEL,
132 0600, "smb%d", device_get_unit(dev));
133 UID_ROOT, GID_WHEEL,
134 0600, "smb%d", device_get_unit(dev));
135
133 return (0);
134}
135
136static int
136 return (0);
137}
138
139static int
140smb_detach(device_t dev)
141{
142 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
143
144 if (sc->sc_devnode)
145 destroy_dev(sc->sc_devnode);
146
147 return (0);
148}
149
150static int
137smbopen (dev_t dev, int flags, int fmt, struct thread *td)
138{
139 struct smb_softc *sc = IIC_SOFTC(minor(dev));
140
141 if (!sc)
142 return (EINVAL);
143
144 if (sc->sc_count)

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262
263 /* release the bus */
264 smbus_release_bus(parent, smbdev);
265
266 return (error);
267}
268
269DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);
151smbopen (dev_t dev, int flags, int fmt, struct thread *td)
152{
153 struct smb_softc *sc = IIC_SOFTC(minor(dev));
154
155 if (!sc)
156 return (EINVAL);
157
158 if (sc->sc_count)

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276
277 /* release the bus */
278 smbus_release_bus(parent, smbdev);
279
280 return (error);
281}
282
283DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);
284MODULE_DEPEND(smb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
285MODULE_VERSION(smb, 1);