[SPARC64]: Add of_device layer and make ebus/isa use it.

Sparcspkr and power drivers are converted, to make sure it works.
Eventually the SBUS device layer will use this as a sub-class.

I really cannot cut loose on that bit until sparc32 is given the
same infrastructure.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 279 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c
new file mode 100644
index 00000000000..566aa343aa6
--- /dev/null
+++ b/arch/sparc64/kernel/of_device.c
@@ -0,0 +1,279 @@
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+
+#include <asm/errno.h>
+#include <asm/of_device.h>
+
+/**
+ * of_match_device - Tell if an of_device structure has a matching
+ * of_match structure
+ * @ids: array of of device match structures to search in
+ * @dev: the of device structure to match against
+ *
+ * Used by a driver to check whether an of_device present in the
+ * system is in its list of supported devices.
+ */
+const struct of_device_id *of_match_device(const struct of_device_id *matches,
+					const struct of_device *dev)
+{
+	if (!dev->node)
+		return NULL;
+	while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
+		int match = 1;
+		if (matches->name[0])
+			match &= dev->node->name
+				&& !strcmp(matches->name, dev->node->name);
+		if (matches->type[0])
+			match &= dev->node->type
+				&& !strcmp(matches->type, dev->node->type);
+		if (matches->compatible[0])
+			match &= of_device_is_compatible(dev->node,
+							 matches->compatible);
+		if (match)
+			return matches;
+		matches++;
+	}
+	return NULL;
+}
+
+static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct of_device * of_dev = to_of_device(dev);
+	struct of_platform_driver * of_drv = to_of_platform_driver(drv);
+	const struct of_device_id * matches = of_drv->match_table;
+
+	if (!matches)
+		return 0;
+
+	return of_match_device(matches, of_dev) != NULL;
+}
+
+struct of_device *of_dev_get(struct of_device *dev)
+{
+	struct device *tmp;
+
+	if (!dev)
+		return NULL;
+	tmp = get_device(&dev->dev);
+	if (tmp)
+		return to_of_device(tmp);
+	else
+		return NULL;
+}
+
+void of_dev_put(struct of_device *dev)
+{
+	if (dev)
+		put_device(&dev->dev);
+}
+
+
+static int of_device_probe(struct device *dev)
+{
+	int error = -ENODEV;
+	struct of_platform_driver *drv;
+	struct of_device *of_dev;
+	const struct of_device_id *match;
+
+	drv = to_of_platform_driver(dev->driver);
+	of_dev = to_of_device(dev);
+
+	if (!drv->probe)
+		return error;
+
+	of_dev_get(of_dev);
+
+	match = of_match_device(drv->match_table, of_dev);
+	if (match)
+		error = drv->probe(of_dev, match);
+	if (error)
+		of_dev_put(of_dev);
+
+	return error;
+}
+
+static int of_device_remove(struct device *dev)
+{
+	struct of_device * of_dev = to_of_device(dev);
+	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
+
+	if (dev->driver && drv->remove)
+		drv->remove(of_dev);
+	return 0;
+}
+
+static int of_device_suspend(struct device *dev, pm_message_t state)
+{
+	struct of_device * of_dev = to_of_device(dev);
+	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
+	int error = 0;
+
+	if (dev->driver && drv->suspend)
+		error = drv->suspend(of_dev, state);
+	return error;
+}
+
+static int of_device_resume(struct device * dev)
+{
+	struct of_device * of_dev = to_of_device(dev);
+	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
+	int error = 0;
+
+	if (dev->driver && drv->resume)
+		error = drv->resume(of_dev);
+	return error;
+}
+
+#ifdef CONFIG_PCI
+struct bus_type isa_bus_type = {
+       .name	= "isa",
+       .match	= of_platform_bus_match,
+       .probe	= of_device_probe,
+       .remove	= of_device_remove,
+       .suspend	= of_device_suspend,
+       .resume	= of_device_resume,
+};
+
+struct bus_type ebus_bus_type = {
+       .name	= "ebus",
+       .match	= of_platform_bus_match,
+       .probe	= of_device_probe,
+       .remove	= of_device_remove,
+       .suspend	= of_device_suspend,
+       .resume	= of_device_resume,
+};
+#endif
+
+#ifdef CONFIG_SBUS
+struct bus_type sbus_bus_type = {
+       .name	= "sbus",
+       .match	= of_platform_bus_match,
+       .probe	= of_device_probe,
+       .remove	= of_device_remove,
+       .suspend	= of_device_suspend,
+       .resume	= of_device_resume,
+};
+#endif
+
+static int __init of_bus_driver_init(void)
+{
+	int err = 0;
+
+#ifdef CONFIG_PCI
+	if (!err)
+		err = bus_register(&isa_bus_type);
+	if (!err)
+		err = bus_register(&ebus_bus_type);
+#endif
+#ifdef CONFIG_SBUS
+	if (!err)
+		err = bus_register(&sbus_bus_type);
+#endif
+	return 0;
+}
+
+postcore_initcall(of_bus_driver_init);
+
+int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
+{
+	/* initialize common driver fields */
+	drv->driver.name = drv->name;
+	drv->driver.bus = bus;
+
+	/* register with core */
+	return driver_register(&drv->driver);
+}
+
+void of_unregister_driver(struct of_platform_driver *drv)
+{
+	driver_unregister(&drv->driver);
+}
+
+
+static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct of_device *ofdev;
+
+	ofdev = to_of_device(dev);
+	return sprintf(buf, "%s", ofdev->node->full_name);
+}
+
+static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);
+
+/**
+ * of_release_dev - free an of device structure when all users of it are finished.
+ * @dev: device that's been disconnected
+ *
+ * Will be called only by the device core when all users of this of device are
+ * done.
+ */
+void of_release_dev(struct device *dev)
+{
+	struct of_device *ofdev;
+
+        ofdev = to_of_device(dev);
+
+	kfree(ofdev);
+}
+
+int of_device_register(struct of_device *ofdev)
+{
+	int rc;
+
+	BUG_ON(ofdev->node == NULL);
+
+	rc = device_register(&ofdev->dev);
+	if (rc)
+		return rc;
+
+	device_create_file(&ofdev->dev, &dev_attr_devspec);
+
+	return 0;
+}
+
+void of_device_unregister(struct of_device *ofdev)
+{
+	device_remove_file(&ofdev->dev, &dev_attr_devspec);
+	device_unregister(&ofdev->dev);
+}
+
+struct of_device* of_platform_device_create(struct device_node *np,
+					    const char *bus_id,
+					    struct device *parent,
+					    struct bus_type *bus)
+{
+	struct of_device *dev;
+
+	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return NULL;
+	memset(dev, 0, sizeof(*dev));
+
+	dev->dev.parent = parent;
+	dev->dev.bus = bus;
+	dev->dev.release = of_release_dev;
+
+	strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
+
+	if (of_device_register(dev) != 0) {
+		kfree(dev);
+		return NULL;
+	}
+
+	return dev;
+}
+
+EXPORT_SYMBOL(of_match_device);
+EXPORT_SYMBOL(of_register_driver);
+EXPORT_SYMBOL(of_unregister_driver);
+EXPORT_SYMBOL(of_device_register);
+EXPORT_SYMBOL(of_device_unregister);
+EXPORT_SYMBOL(of_dev_get);
+EXPORT_SYMBOL(of_dev_put);
+EXPORT_SYMBOL(of_platform_device_create);
+EXPORT_SYMBOL(of_release_dev);