2 * Copyright (c) 1998 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
26 * $FreeBSD: src/sys/dev/smbus/smb.c,v 1.20 1999/11/18 05:44:56 peter Exp $
29 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/systm.h>
32 #include <sys/module.h>
37 #include <sys/malloc.h>
38 #include <sys/fcntl.h>
40 #include <machine/clock.h>
42 #include <dev/smbus/smbconf.h>
43 #include <dev/smbus/smbus.h>
44 #include <machine/smb.h>
52 int sc_addr; /* address on smbus */
53 int sc_count; /* >0 if device opened */
55 char *sc_cp; /* output buffer pointer */
57 char sc_buffer[BUFSIZE]; /* output buffer */
58 char sc_inbuf[BUFSIZE]; /* input buffer */
61 #define IIC_SOFTC(unit) \
62 ((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
64 #define IIC_DEVICE(unit) \
65 (devclass_get_device(smb_devclass, (unit)))
67 static int smb_probe(device_t);
68 static int smb_attach(device_t);
70 static devclass_t smb_devclass;
72 static device_method_t smb_methods[] = {
73 /* device interface */
74 DEVMETHOD(device_probe, smb_probe),
75 DEVMETHOD(device_attach, smb_attach),
78 DEVMETHOD(smbus_intr, smbus_generic_intr),
83 static driver_t smb_driver = {
86 sizeof(struct smb_softc),
89 static d_open_t smbopen;
90 static d_close_t smbclose;
91 static d_write_t smbwrite;
92 static d_read_t smbread;
93 static d_ioctl_t smbioctl;
95 #define CDEV_MAJOR 106
96 static struct cdevsw smb_cdevsw = {
100 /* write */ smbwrite,
101 /* ioctl */ smbioctl,
104 /* strategy */ nostrategy,
106 /* maj */ CDEV_MAJOR,
117 smb_probe(device_t dev)
119 struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
121 sc->sc_addr = smbus_get_addr(dev);
123 /* XXX detect chip with start/stop conditions */
132 smb_attach(device_t dev)
134 make_dev(&smb_cdevsw, device_get_unit(dev), /* XXX cleanup */
136 0600, "smb%d", device_get_unit(dev));
141 smbopen (dev_t dev, int flags, int fmt, struct proc *p)
143 struct smb_softc *sc = IIC_SOFTC(minor(dev));
157 smbclose(dev_t dev, int flags, int fmt, struct proc *p)
159 struct smb_softc *sc = IIC_SOFTC(minor(dev));
173 smbwrite(dev_t dev, struct uio * uio, int ioflag)
181 smbread(dev_t dev, struct uio * uio, int ioflag)
189 smbioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
191 device_t smbdev = IIC_DEVICE(minor(dev));
192 struct smb_softc *sc = IIC_SOFTC(minor(dev));
193 device_t parent = device_get_parent(smbdev);
196 struct smbcmd *s = (struct smbcmd *)data;
201 /* allocate the bus */
202 if ((error = smbus_request_bus(parent, smbdev,
203 (flags & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR))))
207 case SMB_QUICK_WRITE:
208 error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE));
212 error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD));
216 error = smbus_error(smbus_sendb(parent, s->slave, s->cmd));
220 error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd));
224 error = smbus_error(smbus_writeb(parent, s->slave, s->cmd,
229 error = smbus_error(smbus_writew(parent, s->slave,
230 s->cmd, s->data.word));
234 if (s->data.byte_ptr)
235 error = smbus_error(smbus_readb(parent, s->slave,
236 s->cmd, s->data.byte_ptr));
240 if (s->data.word_ptr)
241 error = smbus_error(smbus_readw(parent, s->slave,
242 s->cmd, s->data.word_ptr));
246 if (s->data.process.rdata)
247 error = smbus_error(smbus_pcall(parent, s->slave, s->cmd,
248 s->data.process.sdata, s->data.process.rdata));
252 if (s->count && s->data.byte_ptr)
253 error = smbus_error(smbus_bwrite(parent, s->slave,
254 s->cmd, s->count, s->data.byte_ptr));
258 if (s->count && s->data.byte_ptr)
259 error = smbus_error(smbus_bread(parent, s->slave,
260 s->cmd, s->count, s->data.byte_ptr));
267 /* release the bus */
268 smbus_release_bus(parent, smbdev);
273 DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);