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, char **envp, int num_envp,
60 char *buffer, int buffer_size)
62 struct soundbus_dev * soundbus_dev;
63 struct of_device * of;
64 char *scratch, *compat, *compat2;
66 int length, cplen, cplen2, seen = 0;
71 soundbus_dev = to_soundbus_device(dev);
75 of = &soundbus_dev->ofdev;
77 /* stuff we want to pass to /sbin/hotplug */
78 envp[i++] = scratch = buffer;
79 length = scnprintf (scratch, buffer_size, "OF_NAME=%s", of->node->name);
81 buffer_size -= length;
82 if ((buffer_size <= 0) || (i >= num_envp))
87 length = scnprintf (scratch, buffer_size, "OF_TYPE=%s", of->node->type);
89 buffer_size -= length;
90 if ((buffer_size <= 0) || (i >= num_envp))
94 /* Since the compatible field can contain pretty much anything
95 * it's not really legal to split it out with commas. We split it
96 * up using a number of environment variables instead. */
98 compat = (char *) get_property(of->node, "compatible", &cplen);
101 while (compat && cplen > 0) {
103 length = scnprintf (scratch, buffer_size,
104 "OF_COMPATIBLE_%d=%s", seen, compat);
106 buffer_size -= length;
107 if ((buffer_size <= 0) || (i >= num_envp))
110 length = strlen (compat) + 1;
117 length = scnprintf (scratch, buffer_size, "OF_COMPATIBLE_N=%d", seen);
119 buffer_size -= length;
120 if ((buffer_size <= 0) || (i >= num_envp))
125 length = scnprintf (scratch, buffer_size, "MODALIAS=%s",
126 soundbus_dev->modalias);
128 buffer_size -= length;
129 if ((buffer_size <= 0) || (i >= num_envp))
137 static int soundbus_device_remove(struct device *dev)
139 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
140 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
142 if (dev->driver && drv->remove)
143 drv->remove(soundbus_dev);
144 soundbus_dev_put(soundbus_dev);
149 static void soundbus_device_shutdown(struct device *dev)
151 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
152 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
154 if (dev->driver && drv->shutdown)
155 drv->shutdown(soundbus_dev);
160 static int soundbus_device_suspend(struct device *dev, pm_message_t state)
162 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
163 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
165 if (dev->driver && drv->suspend)
166 return drv->suspend(soundbus_dev, state);
170 static int soundbus_device_resume(struct device * dev)
172 struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
173 struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
175 if (dev->driver && drv->resume)
176 return drv->resume(soundbus_dev);
180 #endif /* CONFIG_PM */
182 extern struct device_attribute soundbus_dev_attrs[];
184 static struct bus_type soundbus_bus_type = {
185 .name = "aoa-soundbus",
186 .probe = soundbus_probe,
187 .uevent = soundbus_uevent,
188 .remove = soundbus_device_remove,
189 .shutdown = soundbus_device_shutdown,
191 .suspend = soundbus_device_suspend,
192 .resume = soundbus_device_resume,
194 .dev_attrs = soundbus_dev_attrs,
197 static int __init soundbus_init(void)
199 return bus_register(&soundbus_bus_type);
202 static void __exit soundbus_exit(void)
204 bus_unregister(&soundbus_bus_type);
207 int soundbus_add_one(struct soundbus_dev *dev)
212 if (!dev->attach_codec ||
216 printk(KERN_ERR "soundbus: adding device failed sanity check!\n");
220 snprintf(dev->ofdev.dev.bus_id, BUS_ID_SIZE, "soundbus:%x", ++devcount);
221 dev->ofdev.dev.bus = &soundbus_bus_type;
222 return of_device_register(&dev->ofdev);
224 EXPORT_SYMBOL_GPL(soundbus_add_one);
226 void soundbus_remove_one(struct soundbus_dev *dev)
228 of_device_unregister(&dev->ofdev);
230 EXPORT_SYMBOL_GPL(soundbus_remove_one);
232 int soundbus_register_driver(struct soundbus_driver *drv)
234 /* initialize common driver fields */
235 drv->driver.name = drv->name;
236 drv->driver.bus = &soundbus_bus_type;
238 /* register with core */
239 return driver_register(&drv->driver);
241 EXPORT_SYMBOL_GPL(soundbus_register_driver);
243 void soundbus_unregister_driver(struct soundbus_driver *drv)
245 driver_unregister(&drv->driver);
247 EXPORT_SYMBOL_GPL(soundbus_unregister_driver);
249 module_init(soundbus_init);
250 module_exit(soundbus_exit);