powerpc: Merge of_device.c and of_device.h

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 274 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/of_device.c b/arch/powerpc/kernel/of_device.c
new file mode 100644
index 000000000000..766718814515
--- /dev/null
+++ b/arch/powerpc/kernel/of_device.c
@@ -0,0 +1,274 @@
+#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 <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 &= 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;
+}
+
+struct bus_type of_platform_bus_type = {
+       .name    = "of_platform",
+       .match   = of_platform_bus_match,
+       .suspend = of_device_suspend,
+       .resume  = of_device_resume,
+};
+
+static int __init of_bus_driver_init(void)
+{
+        return bus_register(&of_platform_bus_type);
+}
+
+postcore_initcall(of_bus_driver_init);
+
+int of_register_driver(struct of_platform_driver *drv)
+{
+        int count = 0;
+
+        /* initialize common driver fields */
+        drv->driver.name = drv->name;
+        drv->driver.bus = &of_platform_bus_type;
+        drv->driver.probe = of_device_probe;
+        drv->driver.remove = of_device_remove;
+
+        /* register with core */
+        count = driver_register(&drv->driver);
+        return count ? count : 1;
+}
+
+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);
+        of_node_put(ofdev->node);
+        kfree(ofdev);
+}
+
+int of_device_register(struct of_device *ofdev)
+{
+        int rc;
+        struct of_device **odprop;
+
+        BUG_ON(ofdev->node == NULL);
+
+        odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
+        if (!odprop) {
+                struct property *new_prop;
+        
+                new_prop = kmalloc(sizeof(struct property) + sizeof(struct of_device *),
+                        GFP_KERNEL);
+                if (new_prop == NULL)
+                        return -ENOMEM;
+                new_prop->name = "linux,device";
+                new_prop->length = sizeof(sizeof(struct of_device *));
+                new_prop->value = (unsigned char *)&new_prop[1];
+                odprop = (struct of_device **)new_prop->value;
+                *odprop = NULL;
+                prom_add_property(ofdev->node, new_prop);
+        }
+        *odprop = ofdev;
+
+        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)
+{
+        struct of_device **odprop;
+
+        device_remove_file(&ofdev->dev, &dev_attr_devspec);
+
+        odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
+        if (odprop)
+                *odprop = NULL;
+
+        device_unregister(&ofdev->dev);
+}
+
+struct of_device* of_platform_device_create(struct device_node *np,
+                                            const char *bus_id,
+                                            struct device *parent)
+{
+        struct of_device *dev;
+
+        dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+        if (!dev)
+                return NULL;
+        memset(dev, 0, sizeof(*dev));
+
+        dev->node = of_node_get(np);
+        dev->dma_mask = 0xffffffffUL;
+        dev->dev.dma_mask = &dev->dma_mask;
+        dev->dev.parent = parent;
+        dev->dev.bus = &of_platform_bus_type;
+        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_platform_bus_type);
+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);