Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
---
drivers/base/Makefile | 1 +
drivers/base/bus.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++
include/driver.h | 17 ++++++++++++
3 files changed, 87 insertions(+), 0 deletions(-)
create mode 100644 drivers/base/bus.c
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 957ca5a..5f19d4d 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -1,3 +1,4 @@
obj-y += driver.o
+obj-y += bus.o
obj-y += platform.o
obj-y += resource.o
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
new file mode 100644
index 0000000..b124ab0
--- /dev/null
+++ b/drivers/base/bus.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <common.h>
+#include <driver.h>
+
+static int bus_match(struct device_d *dev, struct driver_d *drv)
+{
+ return strcmp(dev->name, drv->name) ? -1 : 0;
+}
+
+static int bus_probe(struct device_d *dev)
+{
+ if (dev->driver->probe)
+ return dev->driver->probe(dev);
+ return 0;
+}
+
+static void bus_remove(struct device_d *dev)
+{
+ if (dev->driver->remove)
+ dev->driver->remove(dev);
+}
+
+struct bus_type bus_bus = {
+ .name = "bus",
+ .match = bus_match,
+ .probe = bus_probe,
+ .remove = bus_remove,
+};
+
+void bus_for_each_device(struct bus_type *bus,
+ void (*fn)(struct device_d *dev))
+{
+ struct device_d *dev;
+
+ for_each_device(dev) {
+ if (dev->bus == bus)
+ fn(dev);
+ }
+}
+
+int register_bus_driver(struct driver_d *drv)
+{
+ drv->bus = &bus_bus;
+ return register_driver(drv);
+}
+
+int register_bus_device(struct device_d *dev)
+{
+ dev->bus = &bus_bus;
+ return register_device(dev);
+}
diff --git a/include/driver.h b/include/driver.h
index 0b5a652..ab7424e 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -269,6 +269,23 @@ extern struct list_head driver_list;
*/
#define for_each_device(dev) list_for_each_entry(dev, &device_list, list)
+
+int register_bus_driver(struct driver_d *drv);
+int register_bus_device(struct device_d *dev);
+
+/* Iterate over all bus device
+ */
+void bus_for_each_device(struct bus_type *bus,
+ void (*fn)(struct device_d *dev));
+
+extern struct bus_type bus_bus;
+/* Iterate over all bus
+ */
+static inline void bus_for_each(void (*fn)(struct device_d *dev))
+{
+ bus_for_each_device(&bus_bus, fn);
+}
+
/* Iterate over all drivers
*/
#define for_each_driver(drv) list_for_each_entry(drv, &driver_list, list)
--
1.7.5.4
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