2 * Copyright (c) 1998, 2001 Nicolas Souchu
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifdef HAVE_KERNEL_OPTION_HEADERS
30 #include "opt_compat.h"
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/systm.h>
36 #include <sys/module.h>
40 #include <sys/fcntl.h>
42 #include <dev/smbus/smbconf.h>
43 #include <dev/smbus/smbus.h>
44 #include <dev/smbus/smb.h>
52 int sc_count; /* >0 if device opened */
53 struct cdev *sc_devnode;
56 #define IIC_SOFTC(unit) \
57 ((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
59 #define IIC_DEVICE(unit) \
60 (devclass_get_device(smb_devclass, (unit)))
62 static void smb_identify(driver_t *driver, device_t parent);
63 static int smb_probe(device_t);
64 static int smb_attach(device_t);
65 static int smb_detach(device_t);
67 static devclass_t smb_devclass;
69 static device_method_t smb_methods[] = {
70 /* device interface */
71 DEVMETHOD(device_identify, smb_identify),
72 DEVMETHOD(device_probe, smb_probe),
73 DEVMETHOD(device_attach, smb_attach),
74 DEVMETHOD(device_detach, smb_detach),
77 DEVMETHOD(smbus_intr, smbus_generic_intr),
82 static driver_t smb_driver = {
85 sizeof(struct smb_softc),
88 static d_open_t smbopen;
89 static d_close_t smbclose;
90 static d_ioctl_t smbioctl;
92 static struct cdevsw smb_cdevsw = {
93 .d_version = D_VERSION,
94 .d_flags = D_NEEDGIANT,
102 smb_identify(driver_t *driver, device_t parent)
105 if (device_find_child(parent, "smb", -1) == NULL)
106 BUS_ADD_CHILD(parent, 0, "smb", -1);
110 smb_probe(device_t dev)
112 device_set_desc(dev, "SMBus generic I/O");
118 smb_attach(device_t dev)
120 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
125 bzero(sc, sizeof(struct smb_softc *));
127 sc->sc_devnode = make_dev(&smb_cdevsw, device_get_unit(dev),
129 0600, "smb%d", device_get_unit(dev));
135 smb_detach(device_t dev)
137 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
140 destroy_dev(sc->sc_devnode);
146 smbopen (struct cdev *dev, int flags, int fmt, struct thread *td)
148 struct smb_softc *sc = IIC_SOFTC(minor(dev));
153 if (sc->sc_count != 0)
162 smbclose(struct cdev *dev, int flags, int fmt, struct thread *td)
164 struct smb_softc *sc = IIC_SOFTC(minor(dev));
169 if (sc->sc_count == 0)
170 /* This is not supposed to happen. */
179 smbioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
181 char buf[SMB_MAXBLOCKSIZE];
183 struct smbcmd *s = (struct smbcmd *)data;
184 struct smb_softc *sc = IIC_SOFTC(minor(dev));
185 device_t smbdev = IIC_DEVICE(minor(dev));
196 parent = device_get_parent(smbdev);
198 /* Allocate the bus. */
199 if ((error = smbus_request_bus(parent, smbdev,
200 (flags & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR))))
204 case SMB_QUICK_WRITE:
205 error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE));
209 error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD));
213 error = smbus_error(smbus_sendb(parent, s->slave, s->cmd));
217 error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd));
221 error = smbus_error(smbus_writeb(parent, s->slave, s->cmd,
226 error = smbus_error(smbus_writew(parent, s->slave,
227 s->cmd, s->data.word));
231 if (s->data.byte_ptr) {
232 error = smbus_error(smbus_readb(parent, s->slave,
236 error = copyout(&c, s->data.byte_ptr,
237 sizeof(*(s->data.byte_ptr)));
242 if (s->data.word_ptr) {
243 error = smbus_error(smbus_readw(parent, s->slave,
246 error = copyout(&w, s->data.word_ptr,
247 sizeof(*(s->data.word_ptr)));
253 if (s->data.process.rdata) {
255 error = smbus_error(smbus_pcall(parent, s->slave, s->cmd,
256 s->data.process.sdata, &w));
259 error = copyout(&w, s->data.process.rdata,
260 sizeof(*(s->data.process.rdata)));
266 if (s->count && s->data.byte_ptr) {
267 if (s->count > SMB_MAXBLOCKSIZE)
268 s->count = SMB_MAXBLOCKSIZE;
269 error = copyin(s->data.byte_ptr, buf, s->count);
272 error = smbus_error(smbus_bwrite(parent, s->slave,
273 s->cmd, s->count, buf));
277 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD6)
281 if (s->count && s->data.byte_ptr) {
282 count = min(s->count, SMB_MAXBLOCKSIZE);
283 error = smbus_error(smbus_bread(parent, s->slave,
284 s->cmd, &count, buf));
287 error = copyout(buf, s->data.byte_ptr,
288 min(count, s->count));
297 smbus_release_bus(parent, smbdev);
302 DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);
303 MODULE_DEPEND(smb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
304 MODULE_VERSION(smb, 1);