Root/
1 | /* |
2 | * Advanced Linux Sound Architecture |
3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
4 | * |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | * |
20 | */ |
21 | |
22 | #ifdef CONFIG_SND_OSSEMUL |
23 | |
24 | #if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE)) |
25 | #error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel." |
26 | #endif |
27 | |
28 | #include <linux/init.h> |
29 | #include <linux/export.h> |
30 | #include <linux/slab.h> |
31 | #include <linux/time.h> |
32 | #include <sound/core.h> |
33 | #include <sound/minors.h> |
34 | #include <sound/info.h> |
35 | #include <linux/sound.h> |
36 | #include <linux/mutex.h> |
37 | |
38 | #define SNDRV_OSS_MINORS 256 |
39 | |
40 | static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS]; |
41 | static DEFINE_MUTEX(sound_oss_mutex); |
42 | |
43 | /* NOTE: This function increments the refcount of the associated card like |
44 | * snd_lookup_minor_data(); the caller must call snd_card_unref() appropriately |
45 | */ |
46 | void *snd_lookup_oss_minor_data(unsigned int minor, int type) |
47 | { |
48 | struct snd_minor *mreg; |
49 | void *private_data; |
50 | |
51 | if (minor >= ARRAY_SIZE(snd_oss_minors)) |
52 | return NULL; |
53 | mutex_lock(&sound_oss_mutex); |
54 | mreg = snd_oss_minors[minor]; |
55 | if (mreg && mreg->type == type) { |
56 | private_data = mreg->private_data; |
57 | if (private_data && mreg->card_ptr) |
58 | atomic_inc(&mreg->card_ptr->refcount); |
59 | } else |
60 | private_data = NULL; |
61 | mutex_unlock(&sound_oss_mutex); |
62 | return private_data; |
63 | } |
64 | |
65 | EXPORT_SYMBOL(snd_lookup_oss_minor_data); |
66 | |
67 | static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev) |
68 | { |
69 | int minor; |
70 | |
71 | switch (type) { |
72 | case SNDRV_OSS_DEVICE_TYPE_MIXER: |
73 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
74 | return -EINVAL; |
75 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); |
76 | break; |
77 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: |
78 | minor = SNDRV_MINOR_OSS_SEQUENCER; |
79 | break; |
80 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: |
81 | minor = SNDRV_MINOR_OSS_MUSIC; |
82 | break; |
83 | case SNDRV_OSS_DEVICE_TYPE_PCM: |
84 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
85 | return -EINVAL; |
86 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); |
87 | break; |
88 | case SNDRV_OSS_DEVICE_TYPE_MIDI: |
89 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
90 | return -EINVAL; |
91 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); |
92 | break; |
93 | case SNDRV_OSS_DEVICE_TYPE_DMFM: |
94 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); |
95 | break; |
96 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: |
97 | minor = SNDRV_MINOR_OSS_SNDSTAT; |
98 | break; |
99 | default: |
100 | return -EINVAL; |
101 | } |
102 | if (minor < 0 || minor >= SNDRV_OSS_MINORS) |
103 | return -EINVAL; |
104 | return minor; |
105 | } |
106 | |
107 | int snd_register_oss_device(int type, struct snd_card *card, int dev, |
108 | const struct file_operations *f_ops, void *private_data, |
109 | const char *name) |
110 | { |
111 | int minor = snd_oss_kernel_minor(type, card, dev); |
112 | int minor_unit; |
113 | struct snd_minor *preg; |
114 | int cidx = SNDRV_MINOR_OSS_CARD(minor); |
115 | int track2 = -1; |
116 | int register1 = -1, register2 = -1; |
117 | struct device *carddev = snd_card_get_device_link(card); |
118 | |
119 | if (card && card->number >= SNDRV_MINOR_OSS_DEVICES) |
120 | return 0; /* ignore silently */ |
121 | if (minor < 0) |
122 | return minor; |
123 | preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL); |
124 | if (preg == NULL) |
125 | return -ENOMEM; |
126 | preg->type = type; |
127 | preg->card = card ? card->number : -1; |
128 | preg->device = dev; |
129 | preg->f_ops = f_ops; |
130 | preg->private_data = private_data; |
131 | preg->card_ptr = card; |
132 | mutex_lock(&sound_oss_mutex); |
133 | snd_oss_minors[minor] = preg; |
134 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); |
135 | switch (minor_unit) { |
136 | case SNDRV_MINOR_OSS_PCM: |
137 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); |
138 | break; |
139 | case SNDRV_MINOR_OSS_MIDI: |
140 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); |
141 | break; |
142 | case SNDRV_MINOR_OSS_MIDI1: |
143 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); |
144 | break; |
145 | } |
146 | register1 = register_sound_special_device(f_ops, minor, carddev); |
147 | if (register1 != minor) |
148 | goto __end; |
149 | if (track2 >= 0) { |
150 | register2 = register_sound_special_device(f_ops, track2, |
151 | carddev); |
152 | if (register2 != track2) |
153 | goto __end; |
154 | snd_oss_minors[track2] = preg; |
155 | } |
156 | mutex_unlock(&sound_oss_mutex); |
157 | return 0; |
158 | |
159 | __end: |
160 | if (register2 >= 0) |
161 | unregister_sound_special(register2); |
162 | if (register1 >= 0) |
163 | unregister_sound_special(register1); |
164 | snd_oss_minors[minor] = NULL; |
165 | mutex_unlock(&sound_oss_mutex); |
166 | kfree(preg); |
167 | return -EBUSY; |
168 | } |
169 | |
170 | EXPORT_SYMBOL(snd_register_oss_device); |
171 | |
172 | int snd_unregister_oss_device(int type, struct snd_card *card, int dev) |
173 | { |
174 | int minor = snd_oss_kernel_minor(type, card, dev); |
175 | int cidx = SNDRV_MINOR_OSS_CARD(minor); |
176 | int track2 = -1; |
177 | struct snd_minor *mptr; |
178 | |
179 | if (card && card->number >= SNDRV_MINOR_OSS_DEVICES) |
180 | return 0; |
181 | if (minor < 0) |
182 | return minor; |
183 | mutex_lock(&sound_oss_mutex); |
184 | mptr = snd_oss_minors[minor]; |
185 | if (mptr == NULL) { |
186 | mutex_unlock(&sound_oss_mutex); |
187 | return -ENOENT; |
188 | } |
189 | unregister_sound_special(minor); |
190 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { |
191 | case SNDRV_MINOR_OSS_PCM: |
192 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); |
193 | break; |
194 | case SNDRV_MINOR_OSS_MIDI: |
195 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); |
196 | break; |
197 | case SNDRV_MINOR_OSS_MIDI1: |
198 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); |
199 | break; |
200 | } |
201 | if (track2 >= 0) { |
202 | unregister_sound_special(track2); |
203 | snd_oss_minors[track2] = NULL; |
204 | } |
205 | snd_oss_minors[minor] = NULL; |
206 | mutex_unlock(&sound_oss_mutex); |
207 | kfree(mptr); |
208 | return 0; |
209 | } |
210 | |
211 | EXPORT_SYMBOL(snd_unregister_oss_device); |
212 | |
213 | /* |
214 | * INFO PART |
215 | */ |
216 | |
217 | #ifdef CONFIG_PROC_FS |
218 | |
219 | static struct snd_info_entry *snd_minor_info_oss_entry; |
220 | |
221 | static const char *snd_oss_device_type_name(int type) |
222 | { |
223 | switch (type) { |
224 | case SNDRV_OSS_DEVICE_TYPE_MIXER: |
225 | return "mixer"; |
226 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: |
227 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: |
228 | return "sequencer"; |
229 | case SNDRV_OSS_DEVICE_TYPE_PCM: |
230 | return "digital audio"; |
231 | case SNDRV_OSS_DEVICE_TYPE_MIDI: |
232 | return "raw midi"; |
233 | case SNDRV_OSS_DEVICE_TYPE_DMFM: |
234 | return "hardware dependent"; |
235 | default: |
236 | return "?"; |
237 | } |
238 | } |
239 | |
240 | static void snd_minor_info_oss_read(struct snd_info_entry *entry, |
241 | struct snd_info_buffer *buffer) |
242 | { |
243 | int minor; |
244 | struct snd_minor *mptr; |
245 | |
246 | mutex_lock(&sound_oss_mutex); |
247 | for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) { |
248 | if (!(mptr = snd_oss_minors[minor])) |
249 | continue; |
250 | if (mptr->card >= 0) |
251 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor, |
252 | mptr->card, mptr->device, |
253 | snd_oss_device_type_name(mptr->type)); |
254 | else |
255 | snd_iprintf(buffer, "%3i: : %s\n", minor, |
256 | snd_oss_device_type_name(mptr->type)); |
257 | } |
258 | mutex_unlock(&sound_oss_mutex); |
259 | } |
260 | |
261 | |
262 | int __init snd_minor_info_oss_init(void) |
263 | { |
264 | struct snd_info_entry *entry; |
265 | |
266 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); |
267 | if (entry) { |
268 | entry->c.text.read = snd_minor_info_oss_read; |
269 | if (snd_info_register(entry) < 0) { |
270 | snd_info_free_entry(entry); |
271 | entry = NULL; |
272 | } |
273 | } |
274 | snd_minor_info_oss_entry = entry; |
275 | return 0; |
276 | } |
277 | |
278 | int __exit snd_minor_info_oss_done(void) |
279 | { |
280 | snd_info_free_entry(snd_minor_info_oss_entry); |
281 | return 0; |
282 | } |
283 | #endif /* CONFIG_PROC_FS */ |
284 | |
285 | #endif /* CONFIG_SND_OSSEMUL */ |
286 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9