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-rw-r--r--sys/dev/smbus/smb.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/sys/dev/smbus/smb.c b/sys/dev/smbus/smb.c
new file mode 100644
index 0000000..392594f
--- /dev/null
+++ b/sys/dev/smbus/smb.c
@@ -0,0 +1,284 @@
+/*-
+ * Copyright (c) 1998, 2001 Nicolas Souchu
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/uio.h>
+#include <sys/fcntl.h>
+
+#include <dev/smbus/smbconf.h>
+#include <dev/smbus/smbus.h>
+#include <dev/smbus/smb.h>
+
+#include "smbus_if.h"
+
+#define BUFSIZE 1024
+
+struct smb_softc {
+
+ int sc_count; /* >0 if device opened */
+ dev_t sc_devnode;
+};
+
+#define IIC_SOFTC(unit) \
+ ((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
+
+#define IIC_DEVICE(unit) \
+ (devclass_get_device(smb_devclass, (unit)))
+
+static int smb_probe(device_t);
+static int smb_attach(device_t);
+static int smb_detach(device_t);
+static void smb_identify(driver_t *driver, device_t parent);
+
+static devclass_t smb_devclass;
+
+static device_method_t smb_methods[] = {
+ /* device interface */
+ DEVMETHOD(device_identify, smb_identify),
+ DEVMETHOD(device_probe, smb_probe),
+ DEVMETHOD(device_attach, smb_attach),
+ DEVMETHOD(device_detach, smb_detach),
+
+ /* smbus interface */
+ DEVMETHOD(smbus_intr, smbus_generic_intr),
+
+ { 0, 0 }
+};
+
+static driver_t smb_driver = {
+ "smb",
+ smb_methods,
+ sizeof(struct smb_softc),
+};
+
+static d_open_t smbopen;
+static d_close_t smbclose;
+static d_write_t smbwrite;
+static d_read_t smbread;
+static d_ioctl_t smbioctl;
+
+#define CDEV_MAJOR 106
+static struct cdevsw smb_cdevsw = {
+ /* open */ smbopen,
+ /* close */ smbclose,
+ /* read */ smbread,
+ /* write */ smbwrite,
+ /* ioctl */ smbioctl,
+ /* poll */ nopoll,
+ /* mmap */ nommap,
+ /* strategy */ nostrategy,
+ /* name */ "smb",
+ /* maj */ CDEV_MAJOR,
+ /* dump */ nodump,
+ /* psize */ nopsize,
+ /* flags */ 0,
+};
+
+static void
+smb_identify(driver_t *driver, device_t parent)
+{
+ BUS_ADD_CHILD(parent, 0, "smb", 0);
+}
+
+static int
+smb_probe(device_t dev)
+{
+ device_set_desc(dev, "SMBus generic I/O");
+
+ return (0);
+}
+
+static int
+smb_attach(device_t dev)
+{
+ struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
+
+ if (!sc)
+ return (ENOMEM);
+
+ bzero(sc, sizeof(struct smb_softc *));
+
+ sc->sc_devnode = make_dev(&smb_cdevsw, device_get_unit(dev),
+ UID_ROOT, GID_WHEEL,
+ 0600, "smb%d", device_get_unit(dev));
+
+ return (0);
+}
+
+static int
+smb_detach(device_t dev)
+{
+ struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
+
+ if (sc->sc_devnode)
+ destroy_dev(sc->sc_devnode);
+
+ return (0);
+}
+
+static int
+smbopen (dev_t dev, int flags, int fmt, struct thread *td)
+{
+ struct smb_softc *sc = IIC_SOFTC(minor(dev));
+
+ if (!sc)
+ return (EINVAL);
+
+ if (sc->sc_count)
+ return (EBUSY);
+
+ sc->sc_count++;
+
+ return (0);
+}
+
+static int
+smbclose(dev_t dev, int flags, int fmt, struct thread *td)
+{
+ struct smb_softc *sc = IIC_SOFTC(minor(dev));
+
+ if (!sc)
+ return (EINVAL);
+
+ if (!sc->sc_count)
+ return (EINVAL);
+
+ sc->sc_count--;
+
+ return (0);
+}
+
+static int
+smbwrite(dev_t dev, struct uio * uio, int ioflag)
+{
+ /* not supported */
+
+ return (EINVAL);
+}
+
+static int
+smbread(dev_t dev, struct uio * uio, int ioflag)
+{
+ /* not supported */
+
+ return (EINVAL);
+}
+
+static int
+smbioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td)
+{
+ device_t smbdev = IIC_DEVICE(minor(dev));
+ struct smb_softc *sc = IIC_SOFTC(minor(dev));
+ device_t parent = device_get_parent(smbdev);
+
+ int error = 0;
+ struct smbcmd *s = (struct smbcmd *)data;
+
+ if (!sc || !s)
+ return (EINVAL);
+
+ /* allocate the bus */
+ if ((error = smbus_request_bus(parent, smbdev,
+ (flags & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR))))
+ return (error);
+
+ switch (cmd) {
+ case SMB_QUICK_WRITE:
+ error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE));
+ break;
+
+ case SMB_QUICK_READ:
+ error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD));
+ break;
+
+ case SMB_SENDB:
+ error = smbus_error(smbus_sendb(parent, s->slave, s->cmd));
+ break;
+
+ case SMB_RECVB:
+ error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd));
+ break;
+
+ case SMB_WRITEB:
+ error = smbus_error(smbus_writeb(parent, s->slave, s->cmd,
+ s->data.byte));
+ break;
+
+ case SMB_WRITEW:
+ error = smbus_error(smbus_writew(parent, s->slave,
+ s->cmd, s->data.word));
+ break;
+
+ case SMB_READB:
+ if (s->data.byte_ptr)
+ error = smbus_error(smbus_readb(parent, s->slave,
+ s->cmd, s->data.byte_ptr));
+ break;
+
+ case SMB_READW:
+ if (s->data.word_ptr)
+ error = smbus_error(smbus_readw(parent, s->slave,
+ s->cmd, s->data.word_ptr));
+ break;
+
+ case SMB_PCALL:
+ if (s->data.process.rdata)
+ error = smbus_error(smbus_pcall(parent, s->slave, s->cmd,
+ s->data.process.sdata, s->data.process.rdata));
+ break;
+
+ case SMB_BWRITE:
+ if (s->count && s->data.byte_ptr)
+ error = smbus_error(smbus_bwrite(parent, s->slave,
+ s->cmd, s->count, s->data.byte_ptr));
+ break;
+
+ case SMB_BREAD:
+ if (s->count && s->data.byte_ptr)
+ error = smbus_error(smbus_bread(parent, s->slave,
+ s->cmd, s->count, s->data.byte_ptr));
+ break;
+
+ default:
+ error = ENODEV;
+ }
+
+ /* release the bus */
+ smbus_release_bus(parent, smbdev);
+
+ return (error);
+}
+
+DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);
+MODULE_DEPEND(smb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
+MODULE_VERSION(smb, 1);
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