diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/core/sound_oss.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'sound/core/sound_oss.c')
-rw-r--r-- | sound/core/sound_oss.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c new file mode 100644 index 000000000000..de39d212bc15 --- /dev/null +++ b/sound/core/sound_oss.c | |||
@@ -0,0 +1,250 @@ | |||
1 | /* | ||
2 | * Advanced Linux Sound Architecture | ||
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.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 | #include <sound/driver.h> | ||
23 | |||
24 | #ifdef CONFIG_SND_OSSEMUL | ||
25 | |||
26 | #if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE)) | ||
27 | #error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel." | ||
28 | #endif | ||
29 | |||
30 | #include <linux/init.h> | ||
31 | #include <linux/slab.h> | ||
32 | #include <linux/time.h> | ||
33 | #include <sound/core.h> | ||
34 | #include <sound/minors.h> | ||
35 | #include <sound/info.h> | ||
36 | #include <linux/sound.h> | ||
37 | |||
38 | #define SNDRV_OS_MINORS 256 | ||
39 | |||
40 | static struct list_head snd_oss_minors_hash[SNDRV_CARDS]; | ||
41 | |||
42 | static DECLARE_MUTEX(sound_oss_mutex); | ||
43 | |||
44 | static snd_minor_t *snd_oss_minor_search(int minor) | ||
45 | { | ||
46 | struct list_head *list; | ||
47 | snd_minor_t *mptr; | ||
48 | |||
49 | list_for_each(list, &snd_oss_minors_hash[SNDRV_MINOR_OSS_CARD(minor)]) { | ||
50 | mptr = list_entry(list, snd_minor_t, list); | ||
51 | if (mptr->number == minor) | ||
52 | return mptr; | ||
53 | } | ||
54 | return NULL; | ||
55 | } | ||
56 | |||
57 | static int snd_oss_kernel_minor(int type, snd_card_t * card, int dev) | ||
58 | { | ||
59 | int minor; | ||
60 | |||
61 | switch (type) { | ||
62 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | ||
63 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | ||
64 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); | ||
65 | break; | ||
66 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | ||
67 | minor = SNDRV_MINOR_OSS_SEQUENCER; | ||
68 | break; | ||
69 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | ||
70 | minor = SNDRV_MINOR_OSS_MUSIC; | ||
71 | break; | ||
72 | case SNDRV_OSS_DEVICE_TYPE_PCM: | ||
73 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | ||
74 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); | ||
75 | break; | ||
76 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | ||
77 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | ||
78 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); | ||
79 | break; | ||
80 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | ||
81 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); | ||
82 | break; | ||
83 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: | ||
84 | minor = SNDRV_MINOR_OSS_SNDSTAT; | ||
85 | break; | ||
86 | default: | ||
87 | return -EINVAL; | ||
88 | } | ||
89 | snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL); | ||
90 | return minor; | ||
91 | } | ||
92 | |||
93 | int snd_register_oss_device(int type, snd_card_t * card, int dev, snd_minor_t * reg, const char *name) | ||
94 | { | ||
95 | int minor = snd_oss_kernel_minor(type, card, dev); | ||
96 | int minor_unit; | ||
97 | snd_minor_t *preg; | ||
98 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | ||
99 | int track2 = -1; | ||
100 | int register1 = -1, register2 = -1; | ||
101 | |||
102 | if (minor < 0) | ||
103 | return minor; | ||
104 | preg = (snd_minor_t *)kmalloc(sizeof(snd_minor_t), GFP_KERNEL); | ||
105 | if (preg == NULL) | ||
106 | return -ENOMEM; | ||
107 | *preg = *reg; | ||
108 | preg->number = minor; | ||
109 | preg->device = dev; | ||
110 | down(&sound_oss_mutex); | ||
111 | list_add_tail(&preg->list, &snd_oss_minors_hash[cidx]); | ||
112 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); | ||
113 | switch (minor_unit) { | ||
114 | case SNDRV_MINOR_OSS_PCM: | ||
115 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | ||
116 | break; | ||
117 | case SNDRV_MINOR_OSS_MIDI: | ||
118 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | ||
119 | break; | ||
120 | case SNDRV_MINOR_OSS_MIDI1: | ||
121 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | ||
122 | break; | ||
123 | } | ||
124 | register1 = register_sound_special(reg->f_ops, minor); | ||
125 | if (register1 != minor) | ||
126 | goto __end; | ||
127 | if (track2 >= 0) { | ||
128 | register2 = register_sound_special(reg->f_ops, track2); | ||
129 | if (register2 != track2) | ||
130 | goto __end; | ||
131 | } | ||
132 | up(&sound_oss_mutex); | ||
133 | return 0; | ||
134 | |||
135 | __end: | ||
136 | if (register2 >= 0) | ||
137 | unregister_sound_special(register2); | ||
138 | if (register1 >= 0) | ||
139 | unregister_sound_special(register1); | ||
140 | list_del(&preg->list); | ||
141 | up(&sound_oss_mutex); | ||
142 | kfree(preg); | ||
143 | return -EBUSY; | ||
144 | } | ||
145 | |||
146 | int snd_unregister_oss_device(int type, snd_card_t * card, int dev) | ||
147 | { | ||
148 | int minor = snd_oss_kernel_minor(type, card, dev); | ||
149 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | ||
150 | int track2 = -1; | ||
151 | snd_minor_t *mptr; | ||
152 | |||
153 | if (minor < 0) | ||
154 | return minor; | ||
155 | down(&sound_oss_mutex); | ||
156 | mptr = snd_oss_minor_search(minor); | ||
157 | if (mptr == NULL) { | ||
158 | up(&sound_oss_mutex); | ||
159 | return -ENOENT; | ||
160 | } | ||
161 | unregister_sound_special(minor); | ||
162 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { | ||
163 | case SNDRV_MINOR_OSS_PCM: | ||
164 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | ||
165 | break; | ||
166 | case SNDRV_MINOR_OSS_MIDI: | ||
167 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | ||
168 | break; | ||
169 | case SNDRV_MINOR_OSS_MIDI1: | ||
170 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | ||
171 | break; | ||
172 | } | ||
173 | if (track2 >= 0) | ||
174 | unregister_sound_special(track2); | ||
175 | list_del(&mptr->list); | ||
176 | up(&sound_oss_mutex); | ||
177 | kfree(mptr); | ||
178 | return 0; | ||
179 | } | ||
180 | |||
181 | /* | ||
182 | * INFO PART | ||
183 | */ | ||
184 | |||
185 | #ifdef CONFIG_PROC_FS | ||
186 | |||
187 | static snd_info_entry_t *snd_minor_info_oss_entry = NULL; | ||
188 | |||
189 | static void snd_minor_info_oss_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer) | ||
190 | { | ||
191 | int card, dev; | ||
192 | struct list_head *list; | ||
193 | snd_minor_t *mptr; | ||
194 | |||
195 | down(&sound_oss_mutex); | ||
196 | for (card = 0; card < SNDRV_CARDS; card++) { | ||
197 | list_for_each(list, &snd_oss_minors_hash[card]) { | ||
198 | mptr = list_entry(list, snd_minor_t, list); | ||
199 | dev = SNDRV_MINOR_OSS_DEVICE(mptr->number); | ||
200 | if (dev != SNDRV_MINOR_OSS_SNDSTAT && | ||
201 | dev != SNDRV_MINOR_OSS_SEQUENCER && | ||
202 | dev != SNDRV_MINOR_OSS_MUSIC) | ||
203 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, dev, mptr->comment); | ||
204 | else | ||
205 | snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment); | ||
206 | } | ||
207 | } | ||
208 | up(&sound_oss_mutex); | ||
209 | } | ||
210 | |||
211 | #endif /* CONFIG_PROC_FS */ | ||
212 | |||
213 | int __init snd_minor_info_oss_init(void) | ||
214 | { | ||
215 | #ifdef CONFIG_PROC_FS | ||
216 | snd_info_entry_t *entry; | ||
217 | |||
218 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); | ||
219 | if (entry) { | ||
220 | entry->c.text.read_size = PAGE_SIZE; | ||
221 | entry->c.text.read = snd_minor_info_oss_read; | ||
222 | if (snd_info_register(entry) < 0) { | ||
223 | snd_info_free_entry(entry); | ||
224 | entry = NULL; | ||
225 | } | ||
226 | } | ||
227 | snd_minor_info_oss_entry = entry; | ||
228 | #endif | ||
229 | return 0; | ||
230 | } | ||
231 | |||
232 | int __exit snd_minor_info_oss_done(void) | ||
233 | { | ||
234 | #ifdef CONFIG_PROC_FS | ||
235 | if (snd_minor_info_oss_entry) | ||
236 | snd_info_unregister(snd_minor_info_oss_entry); | ||
237 | #endif | ||
238 | return 0; | ||
239 | } | ||
240 | |||
241 | int __init snd_oss_init_module(void) | ||
242 | { | ||
243 | int card; | ||
244 | |||
245 | for (card = 0; card < SNDRV_CARDS; card++) | ||
246 | INIT_LIST_HEAD(&snd_oss_minors_hash[card]); | ||
247 | return 0; | ||
248 | } | ||
249 | |||
250 | #endif /* CONFIG_SND_OSSEMUL */ | ||