4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6 * GPL v2, can be found in COPYING.
9 #include <linux/module.h>
12 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
13 MODULE_LICENSE("GPL");
14 MODULE_DESCRIPTION("Apple Soundbus");
16 struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev)
22 tmp = get_device(&dev->ofdev.dev);
24 return to_soundbus_device(tmp);
28 EXPORT_SYMBOL_GPL(soundbus_dev_get);
30 void soundbus_dev_put(struct soundbus_dev *dev)
33 put_device(&dev->ofdev.dev);
35 EXPORT_SYMBOL_GPL(soundbus_dev_put);
37 static int soundbus_probe(struct device *dev)
40 struct soundbus_driver *drv;
41 struct soundbus_dev *soundbus_dev;
43 drv = to_soundbus_driver(dev->driver);
44 soundbus_dev = to_soundbus_device(dev);
49 soundbus_dev_get(soundbus_dev);
51 error = drv->probe(soundbus_dev);
53 soundbus_dev_put(soundbus_dev);
59 static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env)
61 struct soundbus_dev * soundbus_dev;
62 struct of_device * of;
70 soundbus_dev = to_soundbus_device(dev);
74 of = &soundbus_dev->ofdev;
76 /* stuff we want to pass to /sbin/hotplug */
77 retval = add_uevent_var(env, "OF_NAME=%s", of->node->name);
81 retval = add_uevent_var(env, "OF_TYPE=%s", of->node->type);
85 /* Since the compatible field can contain pretty much anything
86 * it's not really legal to split it out with commas. We split it
87 * up using a number of environment variables instead. */
89 compat = of_get_property(of->node, "compatible", &cplen);
90 while (compat && cplen > 0) {
91 int tmp = env->buflen;
92 retval = add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat);
95 compat += env->buflen - tmp;
96 cplen -= env->buflen - tmp;
100 retval = add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
103 retval = add_uevent_var(env, "MODALIAS=%s", soundbus_dev->modalias);
108 static int soundbus_device_remove(struct device *dev)
110 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
111 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
113 if (dev->driver && drv->remove)
114 drv->remove(soundbus_dev);
115 soundbus_dev_put(soundbus_dev);
120 static void soundbus_device_shutdown(struct device *dev)
122 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
123 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
125 if (dev->driver && drv->shutdown)
126 drv->shutdown(soundbus_dev);
131 static int soundbus_device_suspend(struct device *dev, pm_message_t state)
133 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
134 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
136 if (dev->driver && drv->suspend)
137 return drv->suspend(soundbus_dev, state);
141 static int soundbus_device_resume(struct device * dev)
143 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
144 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
146 if (dev->driver && drv->resume)
147 return drv->resume(soundbus_dev);
151 #endif /* CONFIG_PM */
153 static struct bus_type soundbus_bus_type = {
154 .name = "aoa-soundbus",
155 .probe = soundbus_probe,
156 .uevent = soundbus_uevent,
157 .remove = soundbus_device_remove,
158 .shutdown = soundbus_device_shutdown,
160 .suspend = soundbus_device_suspend,
161 .resume = soundbus_device_resume,
163 .dev_attrs = soundbus_dev_attrs,
166 int soundbus_add_one(struct soundbus_dev *dev)
171 if (!dev->attach_codec ||
175 printk(KERN_ERR "soundbus: adding device failed sanity check!\n");
179 snprintf(dev->ofdev.dev.bus_id, BUS_ID_SIZE, "soundbus:%x", ++devcount);
180 dev->ofdev.dev.bus = &soundbus_bus_type;
181 return of_device_register(&dev->ofdev);
183 EXPORT_SYMBOL_GPL(soundbus_add_one);
185 void soundbus_remove_one(struct soundbus_dev *dev)
187 of_device_unregister(&dev->ofdev);
189 EXPORT_SYMBOL_GPL(soundbus_remove_one);
191 int soundbus_register_driver(struct soundbus_driver *drv)
193 /* initialize common driver fields */
194 drv->driver.name = drv->name;
195 drv->driver.bus = &soundbus_bus_type;
197 /* register with core */
198 return driver_register(&drv->driver);
200 EXPORT_SYMBOL_GPL(soundbus_register_driver);
202 void soundbus_unregister_driver(struct soundbus_driver *drv)
204 driver_unregister(&drv->driver);
206 EXPORT_SYMBOL_GPL(soundbus_unregister_driver);
208 static int __init soundbus_init(void)
210 return bus_register(&soundbus_bus_type);
213 static void __exit soundbus_exit(void)
215 bus_unregister(&soundbus_bus_type);
218 subsys_initcall(soundbus_init);
219 module_exit(soundbus_exit);