Submitted by: nsouch

System Management Bus generic support over new bus architecture.

1 files changed, 157 insertions, 0 deletions

diff --git a/sys/dev/smbus/smbus.c b/sys/dev/smbus/smbus.c
new file mode 100644
index 0000000..f9f787d
--- /dev/null
+++ b/sys/dev/smbus/smbus.c
@@ -0,0 +1,157 @@
+/*-
+ * Copyright (c) 1998 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.
+ *
+ *	$Id: smbus.c,v 1.1.1.2 1998/08/13 15:16:58 son Exp $
+ *
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h> 
+
+#include <dev/smbus/smbconf.h>
+#include <dev/smbus/smbus.h>
+
+/*
+ * Autoconfiguration and support routines for the Philips serial I2C bus
+ */
+
+#define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev))
+
+/*
+ * structure used to attach devices to the I2C bus
+ */
+struct smbus_device {
+	const char *smbd_name;		/* device name */
+	const u_char smbd_addr;		/* address of the device */
+	const char *smbd_desc;		/* device descriptor */
+};
+
+/*
+ * list of known devices
+ */
+struct smbus_device smbus_children[] = {
+	{ "smb", 0, "General Call" },
+	{ NULL, 0 }
+};
+
+static devclass_t smbus_devclass;
+
+/*
+ * Device methods
+ */
+static int smbus_probe(device_t);
+static int smbus_attach(device_t);
+static void smbus_print_child(device_t, device_t);
+static int smbus_read_ivar(device_t , device_t, int, u_long *);
+
+static device_method_t smbus_methods[] = {
+        /* device interface */
+        DEVMETHOD(device_probe,         smbus_probe),
+        DEVMETHOD(device_attach,        smbus_attach),
+        DEVMETHOD(device_detach,        bus_generic_detach),
+        DEVMETHOD(device_shutdown,      bus_generic_shutdown),
+
+        /* bus interface */
+        DEVMETHOD(bus_print_child,      smbus_print_child),
+        DEVMETHOD(bus_read_ivar,        smbus_read_ivar),
+        DEVMETHOD(bus_write_ivar,       bus_generic_write_ivar),
+        DEVMETHOD(bus_create_intr,      bus_generic_create_intr),
+        DEVMETHOD(bus_connect_intr,     bus_generic_connect_intr),
+
+        { 0, 0 }
+};
+
+static driver_t smbus_driver = {
+        "smbus",
+        smbus_methods,
+        DRIVER_TYPE_MISC,
+        sizeof(struct smbus_softc),
+};
+
+/*
+ * At 'probe' time, we add all the devices which we know about to the
+ * bus.  The generic attach routine will probe and attach them if they
+ * are alive.
+ */
+static int
+smbus_probe(device_t dev)
+{
+	struct smbus_device *smbdev;
+	device_t child;
+
+	for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) {
+
+		child = device_add_child(dev, smbdev->smbd_name, -1, smbdev);
+		device_set_desc(child, smbdev->smbd_desc);
+	}
+
+	return (0);
+}
+
+static int
+smbus_attach(device_t dev)
+{
+	struct smbus_softc *sc = device_get_softc(dev);
+	device_t parent = device_get_parent(dev);
+
+	printf("Probing for devices on the SMB bus:\n");
+	bus_generic_attach(dev);
+         
+        return (0);
+}
+
+void
+smbus_generic_intr(device_t dev, u_char devaddr, char low, char high)
+{
+	return;
+}
+
+static void
+smbus_print_child(device_t bus, device_t dev)
+{
+	struct smbus_device* smbdev = DEVTOSMBUS(dev);
+
+	printf(" on %s%d addr 0x%x", device_get_name(bus),
+		device_get_unit(bus), smbdev->smbd_addr);
+
+	return;
+}
+
+static int
+smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result)
+{
+	struct smbus_device* smbdev = DEVTOSMBUS(dev);
+
+	switch (index) {
+	case SMBUS_IVAR_ADDR:
+		*result = smbdev->smbd_addr;
+		break;
+	}
+	return (ENOENT);
+}
+
+DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0);