Commit | Line | Data |
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f3d9478b JB |
1 | /* |
2 | * soundbus | |
3 | * | |
4 | * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> | |
5 | * | |
6 | * GPL v2, can be found in COPYING. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include "soundbus.h" | |
11 | ||
12 | MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); | |
13 | MODULE_LICENSE("GPL"); | |
14 | MODULE_DESCRIPTION("Apple Soundbus"); | |
15 | ||
16 | struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev) | |
17 | { | |
18 | struct device *tmp; | |
19 | ||
20 | if (!dev) | |
21 | return NULL; | |
22 | tmp = get_device(&dev->ofdev.dev); | |
23 | if (tmp) | |
24 | return to_soundbus_device(tmp); | |
25 | else | |
26 | return NULL; | |
27 | } | |
28 | EXPORT_SYMBOL_GPL(soundbus_dev_get); | |
29 | ||
30 | void soundbus_dev_put(struct soundbus_dev *dev) | |
31 | { | |
32 | if (dev) | |
33 | put_device(&dev->ofdev.dev); | |
34 | } | |
35 | EXPORT_SYMBOL_GPL(soundbus_dev_put); | |
36 | ||
37 | static int soundbus_probe(struct device *dev) | |
38 | { | |
39 | int error = -ENODEV; | |
40 | struct soundbus_driver *drv; | |
41 | struct soundbus_dev *soundbus_dev; | |
42 | ||
43 | drv = to_soundbus_driver(dev->driver); | |
44 | soundbus_dev = to_soundbus_device(dev); | |
45 | ||
46 | if (!drv->probe) | |
47 | return error; | |
48 | ||
49 | soundbus_dev_get(soundbus_dev); | |
50 | ||
51 | error = drv->probe(soundbus_dev); | |
52 | if (error) | |
53 | soundbus_dev_put(soundbus_dev); | |
54 | ||
55 | return error; | |
56 | } | |
57 | ||
58 | ||
7eff2e7a | 59 | static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env) |
f3d9478b JB |
60 | { |
61 | struct soundbus_dev * soundbus_dev; | |
62 | struct of_device * of; | |
a7edd0e6 | 63 | const char *compat; |
7eff2e7a | 64 | int retval = 0; |
bf62456e | 65 | int cplen, seen = 0; |
f3d9478b JB |
66 | |
67 | if (!dev) | |
68 | return -ENODEV; | |
69 | ||
70 | soundbus_dev = to_soundbus_device(dev); | |
71 | if (!soundbus_dev) | |
72 | return -ENODEV; | |
73 | ||
74 | of = &soundbus_dev->ofdev; | |
75 | ||
76 | /* stuff we want to pass to /sbin/hotplug */ | |
61c7a080 | 77 | retval = add_uevent_var(env, "OF_NAME=%s", of->dev.of_node->name); |
bf62456e ER |
78 | if (retval) |
79 | return retval; | |
80 | ||
61c7a080 | 81 | retval = add_uevent_var(env, "OF_TYPE=%s", of->dev.of_node->type); |
bf62456e ER |
82 | if (retval) |
83 | return retval; | |
f3d9478b JB |
84 | |
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. */ | |
88 | ||
61c7a080 | 89 | compat = of_get_property(of->dev.of_node, "compatible", &cplen); |
f3d9478b | 90 | while (compat && cplen > 0) { |
7eff2e7a KS |
91 | int tmp = env->buflen; |
92 | retval = add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat); | |
bf62456e ER |
93 | if (retval) |
94 | return retval; | |
7eff2e7a KS |
95 | compat += env->buflen - tmp; |
96 | cplen -= env->buflen - tmp; | |
bf62456e | 97 | seen += 1; |
f3d9478b JB |
98 | } |
99 | ||
7eff2e7a | 100 | retval = add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen); |
bf62456e ER |
101 | if (retval) |
102 | return retval; | |
7eff2e7a | 103 | retval = add_uevent_var(env, "MODALIAS=%s", soundbus_dev->modalias); |
f3d9478b | 104 | |
bf62456e | 105 | return retval; |
f3d9478b JB |
106 | } |
107 | ||
108 | static int soundbus_device_remove(struct device *dev) | |
109 | { | |
110 | struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); | |
111 | struct soundbus_driver * drv = to_soundbus_driver(dev->driver); | |
112 | ||
113 | if (dev->driver && drv->remove) | |
114 | drv->remove(soundbus_dev); | |
115 | soundbus_dev_put(soundbus_dev); | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | static void soundbus_device_shutdown(struct device *dev) | |
121 | { | |
122 | struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); | |
123 | struct soundbus_driver * drv = to_soundbus_driver(dev->driver); | |
124 | ||
125 | if (dev->driver && drv->shutdown) | |
126 | drv->shutdown(soundbus_dev); | |
127 | } | |
128 | ||
129 | #ifdef CONFIG_PM | |
130 | ||
131 | static int soundbus_device_suspend(struct device *dev, pm_message_t state) | |
132 | { | |
133 | struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); | |
134 | struct soundbus_driver * drv = to_soundbus_driver(dev->driver); | |
135 | ||
136 | if (dev->driver && drv->suspend) | |
137 | return drv->suspend(soundbus_dev, state); | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int soundbus_device_resume(struct device * dev) | |
142 | { | |
143 | struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); | |
144 | struct soundbus_driver * drv = to_soundbus_driver(dev->driver); | |
145 | ||
146 | if (dev->driver && drv->resume) | |
147 | return drv->resume(soundbus_dev); | |
148 | return 0; | |
149 | } | |
150 | ||
151 | #endif /* CONFIG_PM */ | |
152 | ||
f3d9478b JB |
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, | |
159 | #ifdef CONFIG_PM | |
160 | .suspend = soundbus_device_suspend, | |
161 | .resume = soundbus_device_resume, | |
162 | #endif | |
163 | .dev_attrs = soundbus_dev_attrs, | |
164 | }; | |
165 | ||
f3d9478b JB |
166 | int soundbus_add_one(struct soundbus_dev *dev) |
167 | { | |
168 | static int devcount; | |
169 | ||
170 | /* sanity checks */ | |
171 | if (!dev->attach_codec || | |
61c7a080 | 172 | !dev->ofdev.dev.of_node || |
f3d9478b JB |
173 | dev->pcmname || |
174 | dev->pcmid != -1) { | |
175 | printk(KERN_ERR "soundbus: adding device failed sanity check!\n"); | |
176 | return -EINVAL; | |
177 | } | |
178 | ||
bb072bf0 | 179 | dev_set_name(&dev->ofdev.dev, "soundbus:%x", ++devcount); |
f3d9478b JB |
180 | dev->ofdev.dev.bus = &soundbus_bus_type; |
181 | return of_device_register(&dev->ofdev); | |
182 | } | |
183 | EXPORT_SYMBOL_GPL(soundbus_add_one); | |
184 | ||
185 | void soundbus_remove_one(struct soundbus_dev *dev) | |
186 | { | |
187 | of_device_unregister(&dev->ofdev); | |
188 | } | |
189 | EXPORT_SYMBOL_GPL(soundbus_remove_one); | |
190 | ||
191 | int soundbus_register_driver(struct soundbus_driver *drv) | |
192 | { | |
193 | /* initialize common driver fields */ | |
194 | drv->driver.name = drv->name; | |
195 | drv->driver.bus = &soundbus_bus_type; | |
196 | ||
197 | /* register with core */ | |
198 | return driver_register(&drv->driver); | |
199 | } | |
200 | EXPORT_SYMBOL_GPL(soundbus_register_driver); | |
201 | ||
202 | void soundbus_unregister_driver(struct soundbus_driver *drv) | |
203 | { | |
204 | driver_unregister(&drv->driver); | |
205 | } | |
206 | EXPORT_SYMBOL_GPL(soundbus_unregister_driver); | |
207 | ||
a08bc4cb BH |
208 | static int __init soundbus_init(void) |
209 | { | |
210 | return bus_register(&soundbus_bus_type); | |
211 | } | |
212 | ||
213 | static void __exit soundbus_exit(void) | |
214 | { | |
215 | bus_unregister(&soundbus_bus_type); | |
216 | } | |
217 | ||
218 | subsys_initcall(soundbus_init); | |
f3d9478b | 219 | module_exit(soundbus_exit); |