1 files changed, 250 insertions, 0 deletions

diff --git a/sound/aoa/soundbus/core.c b/sound/aoa/soundbus/core.c
new file mode 100644
index 00000000000..abe84a76c83
--- /dev/null
+++ b/sound/aoa/soundbus/core.c
@@ -0,0 +1,250 @@
+/*
+ * soundbus
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+
+#include <linux/module.h>
+#include "soundbus.h"
+
+MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Apple Soundbus");
+
+struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev)
+{
+        struct device *tmp;
+
+        if (!dev)
+                return NULL;
+        tmp = get_device(&dev->ofdev.dev);
+        if (tmp)
+                return to_soundbus_device(tmp);
+        else
+                return NULL;
+}
+EXPORT_SYMBOL_GPL(soundbus_dev_get);
+
+void soundbus_dev_put(struct soundbus_dev *dev)
+{
+        if (dev)
+                put_device(&dev->ofdev.dev);
+}
+EXPORT_SYMBOL_GPL(soundbus_dev_put);
+
+static int soundbus_probe(struct device *dev)
+{
+        int error = -ENODEV;
+        struct soundbus_driver *drv;
+        struct soundbus_dev *soundbus_dev;
+
+        drv = to_soundbus_driver(dev->driver);
+        soundbus_dev = to_soundbus_device(dev);
+
+        if (!drv->probe)
+                return error;
+
+        soundbus_dev_get(soundbus_dev);
+
+        error = drv->probe(soundbus_dev);
+        if (error)
+                soundbus_dev_put(soundbus_dev);
+
+        return error;
+}
+
+
+static int soundbus_uevent(struct device *dev, char **envp, int num_envp,
+                           char *buffer, int buffer_size)
+{
+        struct soundbus_dev * soundbus_dev;
+        struct of_device * of;
+        char *scratch, *compat, *compat2;
+        int i = 0;
+        int length, cplen, cplen2, seen = 0;
+
+        if (!dev)
+                return -ENODEV;
+
+        soundbus_dev = to_soundbus_device(dev);
+        if (!soundbus_dev)
+                return -ENODEV;
+
+        of = &soundbus_dev->ofdev;
+
+        /* stuff we want to pass to /sbin/hotplug */
+        envp[i++] = scratch = buffer;
+        length = scnprintf (scratch, buffer_size, "OF_NAME=%s", of->node->name);
+        ++length;
+        buffer_size -= length;
+        if ((buffer_size <= 0) || (i >= num_envp))
+                return -ENOMEM;
+        scratch += length;
+
+        envp[i++] = scratch;
+        length = scnprintf (scratch, buffer_size, "OF_TYPE=%s", of->node->type);
+        ++length;
+        buffer_size -= length;
+        if ((buffer_size <= 0) || (i >= num_envp))
+                return -ENOMEM;
+        scratch += length;
+
+        /* Since the compatible field can contain pretty much anything
+         * it's not really legal to split it out with commas. We split it
+         * up using a number of environment variables instead. */
+
+        compat = (char *) get_property(of->node, "compatible", &cplen);
+        compat2 = compat;
+        cplen2= cplen;
+        while (compat && cplen > 0) {
+                envp[i++] = scratch;
+                length = scnprintf (scratch, buffer_size,
+                                     "OF_COMPATIBLE_%d=%s", seen, compat);
+                ++length;
+                buffer_size -= length;
+                if ((buffer_size <= 0) || (i >= num_envp))
+                        return -ENOMEM;
+                scratch += length;
+                length = strlen (compat) + 1;
+                compat += length;
+                cplen -= length;
+                seen++;
+        }
+
+        envp[i++] = scratch;
+        length = scnprintf (scratch, buffer_size, "OF_COMPATIBLE_N=%d", seen);
+        ++length;
+        buffer_size -= length;
+        if ((buffer_size <= 0) || (i >= num_envp))
+                return -ENOMEM;
+        scratch += length;
+
+        envp[i++] = scratch;
+        length = scnprintf (scratch, buffer_size, "MODALIAS=%s",
+                        soundbus_dev->modalias);
+
+        buffer_size -= length;
+        if ((buffer_size <= 0) || (i >= num_envp))
+                return -ENOMEM;
+
+        envp[i] = NULL;
+
+        return 0;
+}
+
+static int soundbus_device_remove(struct device *dev)
+{
+        struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+        struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+        if (dev->driver && drv->remove)
+                drv->remove(soundbus_dev);
+        soundbus_dev_put(soundbus_dev);
+
+        return 0;
+}
+
+static void soundbus_device_shutdown(struct device *dev)
+{
+        struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+        struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+        if (dev->driver && drv->shutdown)
+                drv->shutdown(soundbus_dev);
+}
+
+#ifdef CONFIG_PM
+
+static int soundbus_device_suspend(struct device *dev, pm_message_t state)
+{
+        struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+        struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+        if (dev->driver && drv->suspend)
+                return drv->suspend(soundbus_dev, state);
+        return 0;
+}
+
+static int soundbus_device_resume(struct device * dev)
+{
+        struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+        struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+        if (dev->driver && drv->resume)
+                return drv->resume(soundbus_dev);
+        return 0;
+}
+
+#endif /* CONFIG_PM */
+
+extern struct device_attribute soundbus_dev_attrs[];
+
+static struct bus_type soundbus_bus_type = {
+        .name           = "aoa-soundbus",
+        .probe          = soundbus_probe,
+        .uevent         = soundbus_uevent,
+        .remove         = soundbus_device_remove,
+        .shutdown       = soundbus_device_shutdown,
+#ifdef CONFIG_PM
+        .suspend        = soundbus_device_suspend,
+        .resume         = soundbus_device_resume,
+#endif
+        .dev_attrs      = soundbus_dev_attrs,
+};
+
+static int __init soundbus_init(void)
+{
+        return bus_register(&soundbus_bus_type);
+}
+
+static void __exit soundbus_exit(void)
+{
+        bus_unregister(&soundbus_bus_type);
+}
+
+int soundbus_add_one(struct soundbus_dev *dev)
+{
+        static int devcount;
+
+        /* sanity checks */
+        if (!dev->attach_codec ||
+            !dev->ofdev.node ||
+            dev->pcmname ||
+            dev->pcmid != -1) {
+                printk(KERN_ERR "soundbus: adding device failed sanity check!\n");
+                return -EINVAL;
+        }
+
+        snprintf(dev->ofdev.dev.bus_id, BUS_ID_SIZE, "soundbus:%x", ++devcount);
+        dev->ofdev.dev.bus = &soundbus_bus_type;
+        return of_device_register(&dev->ofdev);
+}
+EXPORT_SYMBOL_GPL(soundbus_add_one);
+
+void soundbus_remove_one(struct soundbus_dev *dev)
+{
+        of_device_unregister(&dev->ofdev);
+}
+EXPORT_SYMBOL_GPL(soundbus_remove_one);
+
+int soundbus_register_driver(struct soundbus_driver *drv)
+{
+        /* initialize common driver fields */
+        drv->driver.name = drv->name;
+        drv->driver.bus = &soundbus_bus_type;
+
+        /* register with core */
+        return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(soundbus_register_driver);
+
+void soundbus_unregister_driver(struct soundbus_driver *drv)
+{
+        driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(soundbus_unregister_driver);
+
+module_init(soundbus_init);
+module_exit(soundbus_exit);