DEVFS - remove dev_ops_add(), dev_ops_get(), and get_dev()
[dragonfly.git] / sys / bus / smbus / smb.c
CommitLineData
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1/*-
2 * Copyright (c) 1998 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
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 AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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: src/sys/dev/smbus/smb.c,v 1.20 1999/11/18 05:44:56 peter Exp $
b13267a5 27 * $DragonFly: src/sys/bus/smbus/smb.c,v 1.9 2006/09/10 01:26:33 dillon Exp $
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28 *
29 */
30#include <sys/param.h>
31#include <sys/kernel.h>
32#include <sys/systm.h>
33#include <sys/module.h>
34#include <sys/bus.h>
35#include <sys/conf.h>
36#include <sys/buf.h>
37#include <sys/uio.h>
38#include <sys/malloc.h>
39#include <sys/fcntl.h>
40
41#include <machine/clock.h>
42
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43#include "smbconf.h"
44#include "smbus.h"
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45#include <machine/smb.h>
46
47#include "smbus_if.h"
48
49#define BUFSIZE 1024
50
51struct smb_softc {
52
53 int sc_addr; /* address on smbus */
54 int sc_count; /* >0 if device opened */
55
56 char *sc_cp; /* output buffer pointer */
57
58 char sc_buffer[BUFSIZE]; /* output buffer */
59 char sc_inbuf[BUFSIZE]; /* input buffer */
60};
61
62#define IIC_SOFTC(unit) \
63 ((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
64
65#define IIC_DEVICE(unit) \
66 (devclass_get_device(smb_devclass, (unit)))
67
68static int smb_probe(device_t);
69static int smb_attach(device_t);
70
71static devclass_t smb_devclass;
72
73static device_method_t smb_methods[] = {
74 /* device interface */
75 DEVMETHOD(device_probe, smb_probe),
76 DEVMETHOD(device_attach, smb_attach),
77
78 /* smbus interface */
79 DEVMETHOD(smbus_intr, smbus_generic_intr),
80
81 { 0, 0 }
82};
83
84static driver_t smb_driver = {
85 "smb",
86 smb_methods,
87 sizeof(struct smb_softc),
88};
89
90static d_open_t smbopen;
91static d_close_t smbclose;
92static d_write_t smbwrite;
93static d_read_t smbread;
94static d_ioctl_t smbioctl;
95
96#define CDEV_MAJOR 106
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97static struct dev_ops smb_ops = {
98 { "smb", CDEV_MAJOR, 0 },
99 .d_open = smbopen,
100 .d_close = smbclose,
101 .d_read = smbread,
102 .d_write = smbwrite,
103 .d_ioctl = smbioctl,
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104};
105
106/*
107 * smbprobe()
108 */
109static int
110smb_probe(device_t dev)
111{
112 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
113
114 sc->sc_addr = smbus_get_addr(dev);
115
116 /* XXX detect chip with start/stop conditions */
117
118 return (0);
119}
120
121/*
122 * smbattach()
123 */
124static int
125smb_attach(device_t dev)
126{
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127 make_dev(&smb_ops, device_get_unit(dev),
128 UID_ROOT, GID_WHEEL,
129 0600, "smb%d", device_get_unit(dev));
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130 return (0);
131}
132
133static int
fef8985e 134smbopen (struct dev_open_args *ap)
984263bc 135{
b13267a5 136 cdev_t dev = ap->a_head.a_dev;
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137 struct smb_softc *sc = IIC_SOFTC(minor(dev));
138
139 if (!sc)
140 return (EINVAL);
141
142 if (sc->sc_count)
143 return (EBUSY);
144
145 sc->sc_count++;
146
147 return (0);
148}
149
150static int
fef8985e 151smbclose(struct dev_close_args *ap)
984263bc 152{
b13267a5 153 cdev_t dev = ap->a_head.a_dev;
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154 struct smb_softc *sc = IIC_SOFTC(minor(dev));
155
156 if (!sc)
157 return (EINVAL);
158
159 if (!sc->sc_count)
160 return (EINVAL);
161
162 sc->sc_count--;
163
164 return (0);
165}
166
167static int
fef8985e 168smbwrite(struct dev_write_args *ap)
984263bc 169{
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170 return (EINVAL);
171}
172
173static int
fef8985e 174smbread(struct dev_read_args *ap)
984263bc 175{
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176 return (EINVAL);
177}
178
179static int
fef8985e 180smbioctl(struct dev_ioctl_args *ap)
984263bc 181{
b13267a5 182 cdev_t dev = ap->a_head.a_dev;
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183 device_t smbdev = IIC_DEVICE(minor(dev));
184 struct smb_softc *sc = IIC_SOFTC(minor(dev));
185 device_t parent = device_get_parent(smbdev);
186
187 int error = 0;
fef8985e 188 struct smbcmd *s = (struct smbcmd *)ap->a_data;
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189
190 if (!sc || !s)
191 return (EINVAL);
192
193 /* allocate the bus */
194 if ((error = smbus_request_bus(parent, smbdev,
fef8985e 195 (ap->a_fflag & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR))))
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196 return (error);
197
fef8985e 198 switch (ap->a_cmd) {
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199 case SMB_QUICK_WRITE:
200 error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE));
201 break;
202
203 case SMB_QUICK_READ:
204 error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD));
205 break;
206
207 case SMB_SENDB:
208 error = smbus_error(smbus_sendb(parent, s->slave, s->cmd));
209 break;
210
211 case SMB_RECVB:
212 error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd));
213 break;
214
215 case SMB_WRITEB:
216 error = smbus_error(smbus_writeb(parent, s->slave, s->cmd,
217 s->data.byte));
218 break;
219
220 case SMB_WRITEW:
221 error = smbus_error(smbus_writew(parent, s->slave,
222 s->cmd, s->data.word));
223 break;
224
225 case SMB_READB:
226 if (s->data.byte_ptr)
227 error = smbus_error(smbus_readb(parent, s->slave,
228 s->cmd, s->data.byte_ptr));
229 break;
230
231 case SMB_READW:
232 if (s->data.word_ptr)
233 error = smbus_error(smbus_readw(parent, s->slave,
234 s->cmd, s->data.word_ptr));
235 break;
236
237 case SMB_PCALL:
238 if (s->data.process.rdata)
239 error = smbus_error(smbus_pcall(parent, s->slave, s->cmd,
240 s->data.process.sdata, s->data.process.rdata));
241 break;
242
243 case SMB_BWRITE:
244 if (s->count && s->data.byte_ptr)
245 error = smbus_error(smbus_bwrite(parent, s->slave,
246 s->cmd, s->count, s->data.byte_ptr));
247 break;
248
249 case SMB_BREAD:
250 if (s->count && s->data.byte_ptr)
251 error = smbus_error(smbus_bread(parent, s->slave,
252 s->cmd, s->count, s->data.byte_ptr));
253 break;
254
255 default:
256 error = ENODEV;
257 }
258
259 /* release the bus */
260 smbus_release_bus(parent, smbdev);
261
262 return (error);
263}
264
265DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);