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branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
279 lines
6.2 KiB
C
279 lines
6.2 KiB
C
/*-
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* Copyright (c) 1998, 2001 Nicolas Souchu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/uio.h>
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#include <sys/fcntl.h>
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#include <dev/smbus/smbconf.h>
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#include <dev/smbus/smbus.h>
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#include <dev/smbus/smb.h>
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#include "smbus_if.h"
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#define BUFSIZE 1024
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struct smb_softc {
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int sc_count; /* >0 if device opened */
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dev_t sc_devnode;
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};
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#define IIC_SOFTC(unit) \
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((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
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#define IIC_DEVICE(unit) \
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(devclass_get_device(smb_devclass, (unit)))
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static int smb_probe(device_t);
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static int smb_attach(device_t);
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static int smb_detach(device_t);
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static void smb_identify(driver_t *driver, device_t parent);
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static devclass_t smb_devclass;
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static device_method_t smb_methods[] = {
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/* device interface */
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DEVMETHOD(device_identify, smb_identify),
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DEVMETHOD(device_probe, smb_probe),
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DEVMETHOD(device_attach, smb_attach),
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DEVMETHOD(device_detach, smb_detach),
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/* smbus interface */
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DEVMETHOD(smbus_intr, smbus_generic_intr),
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{ 0, 0 }
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};
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static driver_t smb_driver = {
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"smb",
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smb_methods,
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sizeof(struct smb_softc),
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};
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static d_open_t smbopen;
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static d_close_t smbclose;
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static d_write_t smbwrite;
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static d_read_t smbread;
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static d_ioctl_t smbioctl;
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#define CDEV_MAJOR 106
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static struct cdevsw smb_cdevsw = {
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.d_open = smbopen,
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.d_close = smbclose,
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.d_read = smbread,
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.d_write = smbwrite,
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.d_ioctl = smbioctl,
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.d_name = "smb",
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.d_maj = CDEV_MAJOR,
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};
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static void
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smb_identify(driver_t *driver, device_t parent)
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{
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BUS_ADD_CHILD(parent, 0, "smb", 0);
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}
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static int
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smb_probe(device_t dev)
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{
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device_set_desc(dev, "SMBus generic I/O");
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return (0);
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}
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static int
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smb_attach(device_t dev)
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{
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struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
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if (!sc)
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return (ENOMEM);
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bzero(sc, sizeof(struct smb_softc *));
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sc->sc_devnode = make_dev(&smb_cdevsw, device_get_unit(dev),
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UID_ROOT, GID_WHEEL,
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0600, "smb%d", device_get_unit(dev));
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return (0);
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}
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static int
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smb_detach(device_t dev)
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{
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struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
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if (sc->sc_devnode)
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destroy_dev(sc->sc_devnode);
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return (0);
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}
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static int
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smbopen (dev_t dev, int flags, int fmt, struct thread *td)
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{
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struct smb_softc *sc = IIC_SOFTC(minor(dev));
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if (!sc)
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return (EINVAL);
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if (sc->sc_count)
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return (EBUSY);
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sc->sc_count++;
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return (0);
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}
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static int
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smbclose(dev_t dev, int flags, int fmt, struct thread *td)
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{
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struct smb_softc *sc = IIC_SOFTC(minor(dev));
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if (!sc)
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return (EINVAL);
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if (!sc->sc_count)
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return (EINVAL);
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sc->sc_count--;
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return (0);
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}
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static int
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smbwrite(dev_t dev, struct uio * uio, int ioflag)
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{
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/* not supported */
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return (EINVAL);
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}
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static int
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smbread(dev_t dev, struct uio * uio, int ioflag)
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{
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/* not supported */
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return (EINVAL);
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}
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static int
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smbioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td)
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{
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device_t smbdev = IIC_DEVICE(minor(dev));
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struct smb_softc *sc = IIC_SOFTC(minor(dev));
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device_t parent = device_get_parent(smbdev);
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int error = 0;
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struct smbcmd *s = (struct smbcmd *)data;
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if (!sc || !s)
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return (EINVAL);
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/* allocate the bus */
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if ((error = smbus_request_bus(parent, smbdev,
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(flags & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR))))
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return (error);
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switch (cmd) {
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case SMB_QUICK_WRITE:
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error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE));
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break;
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case SMB_QUICK_READ:
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error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD));
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break;
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case SMB_SENDB:
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error = smbus_error(smbus_sendb(parent, s->slave, s->cmd));
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break;
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case SMB_RECVB:
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error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd));
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break;
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case SMB_WRITEB:
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error = smbus_error(smbus_writeb(parent, s->slave, s->cmd,
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s->data.byte));
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break;
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case SMB_WRITEW:
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error = smbus_error(smbus_writew(parent, s->slave,
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s->cmd, s->data.word));
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break;
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case SMB_READB:
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if (s->data.byte_ptr)
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error = smbus_error(smbus_readb(parent, s->slave,
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s->cmd, s->data.byte_ptr));
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break;
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case SMB_READW:
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if (s->data.word_ptr)
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error = smbus_error(smbus_readw(parent, s->slave,
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s->cmd, s->data.word_ptr));
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break;
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case SMB_PCALL:
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if (s->data.process.rdata)
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error = smbus_error(smbus_pcall(parent, s->slave, s->cmd,
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s->data.process.sdata, s->data.process.rdata));
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break;
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case SMB_BWRITE:
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if (s->count && s->data.byte_ptr)
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error = smbus_error(smbus_bwrite(parent, s->slave,
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s->cmd, s->count, s->data.byte_ptr));
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break;
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case SMB_BREAD:
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if (s->count && s->data.byte_ptr)
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error = smbus_error(smbus_bread(parent, s->slave,
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s->cmd, s->count, s->data.byte_ptr));
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break;
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default:
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error = ENODEV;
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}
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/* release the bus */
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smbus_release_bus(parent, smbdev);
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return (error);
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}
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DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);
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MODULE_DEPEND(smb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
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MODULE_VERSION(smb, 1);
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