Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / zorro / zorro-driver.c

diff --git a/kernel/drivers/zorro/zorro-driver.c b/kernel/drivers/zorro/zorro-driver.c
new file mode 100644 (file)
index 0000000..eacae14
--- /dev/null
+++ b/kernel/drivers/zorro/zorro-driver.c
@@ -0,0 +1,180 @@
+/*
+ *  Zorro Driver Services
+ *
+ *  Copyright (C) 2003 Geert Uytterhoeven
+ *
+ *  Loosely based on drivers/pci/pci-driver.c
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive
+ *  for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/zorro.h>
+
+
+    /**
+     *  zorro_match_device - Tell if a Zorro device structure has a matching
+     *                       Zorro device id structure
+     *  @ids: array of Zorro device id structures to search in
+     *  @dev: the Zorro device structure to match against
+     *
+     *  Used by a driver to check whether a Zorro device present in the
+     *  system is in its list of supported devices. Returns the matching
+     *  zorro_device_id structure or %NULL if there is no match.
+     */
+
+const struct zorro_device_id *
+zorro_match_device(const struct zorro_device_id *ids,
+                  const struct zorro_dev *z)
+{
+       while (ids->id) {
+               if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
+                       return ids;
+               ids++;
+       }
+       return NULL;
+}
+EXPORT_SYMBOL(zorro_match_device);
+
+
+static int zorro_device_probe(struct device *dev)
+{
+       int error = 0;
+       struct zorro_driver *drv = to_zorro_driver(dev->driver);
+       struct zorro_dev *z = to_zorro_dev(dev);
+
+       if (!z->driver && drv->probe) {
+               const struct zorro_device_id *id;
+
+               id = zorro_match_device(drv->id_table, z);
+               if (id)
+                       error = drv->probe(z, id);
+               if (error >= 0) {
+                       z->driver = drv;
+                       error = 0;
+               }
+       }
+       return error;
+}
+
+
+static int zorro_device_remove(struct device *dev)
+{
+       struct zorro_dev *z = to_zorro_dev(dev);
+       struct zorro_driver *drv = to_zorro_driver(dev->driver);
+
+       if (drv) {
+               if (drv->remove)
+                       drv->remove(z);
+               z->driver = NULL;
+       }
+       return 0;
+}
+
+
+    /**
+     *  zorro_register_driver - register a new Zorro driver
+     *  @drv: the driver structure to register
+     *
+     *  Adds the driver structure to the list of registered drivers
+     *  Returns zero or a negative error value.
+     */
+
+int zorro_register_driver(struct zorro_driver *drv)
+{
+       /* initialize common driver fields */
+       drv->driver.name = drv->name;
+       drv->driver.bus = &zorro_bus_type;
+
+       /* register with core */
+       return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL(zorro_register_driver);
+
+
+    /**
+     *  zorro_unregister_driver - unregister a zorro driver
+     *  @drv: the driver structure to unregister
+     *
+     *  Deletes the driver structure from the list of registered Zorro drivers,
+     *  gives it a chance to clean up by calling its remove() function for
+     *  each device it was responsible for, and marks those devices as
+     *  driverless.
+     */
+
+void zorro_unregister_driver(struct zorro_driver *drv)
+{
+       driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL(zorro_unregister_driver);
+
+
+    /**
+     *  zorro_bus_match - Tell if a Zorro device structure has a matching Zorro
+     *                    device id structure
+     *  @ids: array of Zorro device id structures to search in
+     *  @dev: the Zorro device structure to match against
+     *
+     *  Used by a driver to check whether a Zorro device present in the
+     *  system is in its list of supported devices.Returns the matching
+     *  zorro_device_id structure or %NULL if there is no match.
+     */
+
+static int zorro_bus_match(struct device *dev, struct device_driver *drv)
+{
+       struct zorro_dev *z = to_zorro_dev(dev);
+       struct zorro_driver *zorro_drv = to_zorro_driver(drv);
+       const struct zorro_device_id *ids = zorro_drv->id_table;
+
+       if (!ids)
+               return 0;
+
+       while (ids->id) {
+               if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
+                       return 1;
+               ids++;
+       }
+       return 0;
+}
+
+static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+       struct zorro_dev *z;
+
+       if (!dev)
+               return -ENODEV;
+
+       z = to_zorro_dev(dev);
+       if (!z)
+               return -ENODEV;
+
+       if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) ||
+           add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) ||
+           add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) ||
+           add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id))
+               return -ENOMEM;
+
+       return 0;
+}
+
+struct bus_type zorro_bus_type = {
+       .name     = "zorro",
+       .dev_name = "zorro",
+       .match    = zorro_bus_match,
+       .uevent   = zorro_uevent,
+       .probe    = zorro_device_probe,
+       .remove   = zorro_device_remove,
+};
+EXPORT_SYMBOL(zorro_bus_type);
+
+
+static int __init zorro_driver_init(void)
+{
+       return bus_register(&zorro_bus_type);
+}
+
+postcore_initcall(zorro_driver_init);
+