[TC] MIPS: TURBOchannel update to the driver model

This is a set of changes to convert support for the TURBOchannel bus to the
driver model.  It implements the usual set of calls similar to what other bus
drivers have: tc_register_driver(), tc_unregister_driver(), etc.  All the
platform-specific bits have been removed and headers from asm-mips/dec/ have
been merged into linux/tc.h, which should be included by drivers.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/tc/tc-driver.c b/drivers/tc/tc-driver.c
new file mode 100644
index 000000000000..16b5bae63c74
--- /dev/null
+++ b/drivers/tc/tc-driver.c
@@ -0,0 +1,110 @@
+/*
+ *      TURBOchannel driver services.
+ *
+ *      Copyright (c) 2005  James Simmons
+ *      Copyright (c) 2006  Maciej W. Rozycki
+ *
+ *      Loosely based on drivers/dio/dio-driver.c and
+ *      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/tc.h>
+
+/**
+ * tc_register_driver - register a new TC driver
+ * @drv: the driver structure to register
+ *
+ * Adds the driver structure to the list of registered drivers
+ * Returns a negative value on error, otherwise 0.
+ * If no error occurred, the driver remains registered even if
+ * no device was claimed during registration.
+ */
+int tc_register_driver(struct tc_driver *tdrv)
+{
+        return driver_register(&tdrv->driver);
+}
+EXPORT_SYMBOL(tc_register_driver);
+
+/**
+ * tc_unregister_driver - unregister a TC driver
+ * @drv: the driver structure to unregister
+ *
+ * Deletes the driver structure from the list of registered TC 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 tc_unregister_driver(struct tc_driver *tdrv)
+{
+        driver_unregister(&tdrv->driver);
+}
+EXPORT_SYMBOL(tc_unregister_driver);
+
+/**
+ * tc_match_device - tell if a TC device structure has a matching
+ *                   TC device ID structure
+ * @tdrv: the TC driver to earch for matching TC device ID strings
+ * @tdev: the TC device structure to match against
+ *
+ * Used by a driver to check whether a TC device present in the
+ * system is in its list of supported devices.  Returns the matching
+ * tc_device_id structure or %NULL if there is no match.
+ */
+const struct tc_device_id *tc_match_device(struct tc_driver *tdrv,
+                                           struct tc_dev *tdev)
+{
+        const struct tc_device_id *id = tdrv->id_table;
+
+        if (id) {
+                while (id->name[0] || id->vendor[0]) {
+                        if (strcmp(tdev->name, id->name) == 0 &&
+                            strcmp(tdev->vendor, id->vendor) == 0)
+                                return id;
+                        id++;
+                }
+        }
+        return NULL;
+}
+EXPORT_SYMBOL(tc_match_device);
+
+/**
+ * tc_bus_match - Tell if a device structure has a matching
+ *                TC device ID structure
+ * @dev: the device structure to match against
+ * @drv: the device driver to search for matching TC device ID strings
+ *
+ * Used by a driver to check whether a TC device present in the
+ * system is in its list of supported devices.  Returns 1 if there
+ * is a match or 0 otherwise.
+ */
+static int tc_bus_match(struct device *dev, struct device_driver *drv)
+{
+        struct tc_dev *tdev = to_tc_dev(dev);
+        struct tc_driver *tdrv = to_tc_driver(drv);
+        const struct tc_device_id *id;
+
+        id = tc_match_device(tdrv, tdev);
+        if (id)
+                return 1;
+
+        return 0;
+}
+
+struct bus_type tc_bus_type = {
+        .name   = "tc",
+        .match  = tc_bus_match,
+};
+EXPORT_SYMBOL(tc_bus_type);
+
+static int __init tc_driver_init(void)
+{
+        return bus_register(&tc_bus_type);
+}
+
+postcore_initcall(tc_driver_init);