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;
57 static void smb_identify(driver_t *driver, device_t parent);
58 static int smb_probe(device_t);
59 static int smb_attach(device_t);
60 static int smb_detach(device_t);
62 static devclass_t smb_devclass;
64 static device_method_t smb_methods[] = {
65 /* device interface */
66 DEVMETHOD(device_identify, smb_identify),
67 DEVMETHOD(device_probe, smb_probe),
68 DEVMETHOD(device_attach, smb_attach),
69 DEVMETHOD(device_detach, smb_detach),
72 DEVMETHOD(smbus_intr, smbus_generic_intr),
77 static driver_t smb_driver = {
80 sizeof(struct smb_softc),
83 static d_open_t smbopen;
84 static d_close_t smbclose;
85 static d_ioctl_t smbioctl;
87 static struct cdevsw smb_cdevsw = {
88 .d_version = D_VERSION,
89 .d_flags = D_TRACKCLOSE,
97 smb_identify(driver_t *driver, device_t parent)
100 if (device_find_child(parent, "smb", -1) == NULL)
101 BUS_ADD_CHILD(parent, 0, "smb", -1);
105 smb_probe(device_t dev)
107 device_set_desc(dev, "SMBus generic I/O");
113 smb_attach(device_t dev)
115 struct smb_softc *sc = device_get_softc(dev);
118 sc->sc_devnode = make_dev(&smb_cdevsw, device_get_unit(dev),
119 UID_ROOT, GID_WHEEL, 0600, "smb%d", device_get_unit(dev));
120 sc->sc_devnode->si_drv1 = sc;
121 mtx_init(&sc->sc_lock, device_get_nameunit(dev), NULL, MTX_DEF);
127 smb_detach(device_t dev)
129 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
132 destroy_dev(sc->sc_devnode);
133 mtx_destroy(&sc->sc_lock);
139 smbopen(struct cdev *dev, int flags, int fmt, struct thread *td)
141 struct smb_softc *sc = dev->si_drv1;
143 mtx_lock(&sc->sc_lock);
144 if (sc->sc_count != 0) {
145 mtx_unlock(&sc->sc_lock);
150 mtx_unlock(&sc->sc_lock);
156 smbclose(struct cdev *dev, int flags, int fmt, struct thread *td)
158 struct smb_softc *sc = dev->si_drv1;
160 mtx_lock(&sc->sc_lock);
161 KASSERT(sc->sc_count == 1, ("device not busy"));
163 mtx_unlock(&sc->sc_lock);
169 smbioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
171 char buf[SMB_MAXBLOCKSIZE];
173 struct smbcmd *s = (struct smbcmd *)data;
174 struct smb_softc *sc = dev->si_drv1;
175 device_t smbdev = sc->sc_dev;
181 parent = device_get_parent(smbdev);
183 /* Make sure that LSB bit is cleared. */
187 /* Allocate the bus. */
188 if ((error = smbus_request_bus(parent, smbdev,
189 (flags & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR))))
193 case SMB_QUICK_WRITE:
194 error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE));
198 error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD));
202 error = smbus_error(smbus_sendb(parent, s->slave, s->cmd));
206 error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd));
210 error = smbus_error(smbus_writeb(parent, s->slave, s->cmd,
215 error = smbus_error(smbus_writew(parent, s->slave,
216 s->cmd, s->data.word));
220 if (s->data.byte_ptr) {
221 error = smbus_error(smbus_readb(parent, s->slave,
225 error = copyout(&c, s->data.byte_ptr,
226 sizeof(*(s->data.byte_ptr)));
231 if (s->data.word_ptr) {
232 error = smbus_error(smbus_readw(parent, s->slave,
235 error = copyout(&w, s->data.word_ptr,
236 sizeof(*(s->data.word_ptr)));
242 if (s->data.process.rdata) {
244 error = smbus_error(smbus_pcall(parent, s->slave, s->cmd,
245 s->data.process.sdata, &w));
248 error = copyout(&w, s->data.process.rdata,
249 sizeof(*(s->data.process.rdata)));
255 if (s->count && s->data.byte_ptr) {
256 if (s->count > SMB_MAXBLOCKSIZE)
257 s->count = SMB_MAXBLOCKSIZE;
258 error = copyin(s->data.byte_ptr, buf, s->count);
261 error = smbus_error(smbus_bwrite(parent, s->slave,
262 s->cmd, s->count, buf));
266 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD6)
270 if (s->count && s->data.byte_ptr) {
271 count = min(s->count, SMB_MAXBLOCKSIZE);
272 error = smbus_error(smbus_bread(parent, s->slave,
273 s->cmd, &count, buf));
276 error = copyout(buf, s->data.byte_ptr,
277 min(count, s->count));
286 smbus_release_bus(parent, smbdev);
291 DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);
292 MODULE_DEPEND(smb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
293 MODULE_VERSION(smb, 1);