Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
6983b724 | 38 | #define SNDRV_OSS_MINORS 128 |
1da177e4 | 39 | |
6983b724 | 40 | static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS]; |
1da177e4 LT |
41 | static DECLARE_MUTEX(sound_oss_mutex); |
42 | ||
f87135f5 CL |
43 | void *snd_lookup_oss_minor_data(unsigned int minor, int type) |
44 | { | |
45 | struct snd_minor *mreg; | |
46 | void *private_data; | |
47 | ||
48 | if (minor > ARRAY_SIZE(snd_oss_minors)) | |
49 | return NULL; | |
50 | down(&sound_oss_mutex); | |
51 | mreg = snd_oss_minors[minor]; | |
52 | if (mreg && mreg->type == type) | |
53 | private_data = mreg->private_data; | |
54 | else | |
55 | private_data = NULL; | |
56 | up(&sound_oss_mutex); | |
57 | return private_data; | |
58 | } | |
59 | ||
174c1f65 | 60 | static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev) |
1da177e4 LT |
61 | { |
62 | int minor; | |
63 | ||
64 | switch (type) { | |
65 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
66 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
67 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); | |
68 | break; | |
69 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
70 | minor = SNDRV_MINOR_OSS_SEQUENCER; | |
71 | break; | |
72 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
73 | minor = SNDRV_MINOR_OSS_MUSIC; | |
74 | break; | |
75 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
76 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
77 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); | |
78 | break; | |
79 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
80 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
81 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); | |
82 | break; | |
83 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
84 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); | |
85 | break; | |
86 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: | |
87 | minor = SNDRV_MINOR_OSS_SNDSTAT; | |
88 | break; | |
89 | default: | |
90 | return -EINVAL; | |
91 | } | |
6983b724 | 92 | snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL); |
1da177e4 LT |
93 | return minor; |
94 | } | |
95 | ||
174c1f65 | 96 | int snd_register_oss_device(int type, struct snd_card *card, int dev, |
f87135f5 CL |
97 | struct file_operations *f_ops, void *private_data, |
98 | const char *name) | |
1da177e4 LT |
99 | { |
100 | int minor = snd_oss_kernel_minor(type, card, dev); | |
101 | int minor_unit; | |
174c1f65 | 102 | struct snd_minor *preg; |
1da177e4 LT |
103 | int cidx = SNDRV_MINOR_OSS_CARD(minor); |
104 | int track2 = -1; | |
105 | int register1 = -1, register2 = -1; | |
d568121c | 106 | struct device *carddev = NULL; |
1da177e4 | 107 | |
d001544d CL |
108 | if (card && card->number >= 8) |
109 | return 0; /* ignore silently */ | |
1da177e4 LT |
110 | if (minor < 0) |
111 | return minor; | |
6983b724 | 112 | preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL); |
1da177e4 LT |
113 | if (preg == NULL) |
114 | return -ENOMEM; | |
2af677fc | 115 | preg->type = type; |
6983b724 | 116 | preg->card = card ? card->number : -1; |
1da177e4 | 117 | preg->device = dev; |
2af677fc | 118 | preg->f_ops = f_ops; |
f87135f5 | 119 | preg->private_data = private_data; |
1da177e4 | 120 | down(&sound_oss_mutex); |
6983b724 | 121 | snd_oss_minors[minor] = preg; |
1da177e4 LT |
122 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); |
123 | switch (minor_unit) { | |
124 | case SNDRV_MINOR_OSS_PCM: | |
125 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
126 | break; | |
127 | case SNDRV_MINOR_OSS_MIDI: | |
128 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
129 | break; | |
130 | case SNDRV_MINOR_OSS_MIDI1: | |
131 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
132 | break; | |
133 | } | |
d568121c TI |
134 | if (card) |
135 | carddev = card->dev; | |
2af677fc | 136 | register1 = register_sound_special_device(f_ops, minor, carddev); |
1da177e4 LT |
137 | if (register1 != minor) |
138 | goto __end; | |
139 | if (track2 >= 0) { | |
2af677fc CL |
140 | register2 = register_sound_special_device(f_ops, track2, |
141 | carddev); | |
1da177e4 LT |
142 | if (register2 != track2) |
143 | goto __end; | |
f87135f5 | 144 | snd_oss_minors[track2] = preg; |
1da177e4 LT |
145 | } |
146 | up(&sound_oss_mutex); | |
147 | return 0; | |
148 | ||
149 | __end: | |
150 | if (register2 >= 0) | |
151 | unregister_sound_special(register2); | |
152 | if (register1 >= 0) | |
153 | unregister_sound_special(register1); | |
6983b724 | 154 | snd_oss_minors[minor] = NULL; |
1da177e4 LT |
155 | up(&sound_oss_mutex); |
156 | kfree(preg); | |
157 | return -EBUSY; | |
158 | } | |
159 | ||
174c1f65 | 160 | int snd_unregister_oss_device(int type, struct snd_card *card, int dev) |
1da177e4 LT |
161 | { |
162 | int minor = snd_oss_kernel_minor(type, card, dev); | |
163 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | |
164 | int track2 = -1; | |
174c1f65 | 165 | struct snd_minor *mptr; |
1da177e4 | 166 | |
d001544d CL |
167 | if (card && card->number >= 8) |
168 | return 0; | |
1da177e4 LT |
169 | if (minor < 0) |
170 | return minor; | |
171 | down(&sound_oss_mutex); | |
6983b724 | 172 | mptr = snd_oss_minors[minor]; |
1da177e4 LT |
173 | if (mptr == NULL) { |
174 | up(&sound_oss_mutex); | |
175 | return -ENOENT; | |
176 | } | |
177 | unregister_sound_special(minor); | |
178 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { | |
179 | case SNDRV_MINOR_OSS_PCM: | |
180 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
181 | break; | |
182 | case SNDRV_MINOR_OSS_MIDI: | |
183 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
184 | break; | |
185 | case SNDRV_MINOR_OSS_MIDI1: | |
186 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
187 | break; | |
188 | } | |
f87135f5 | 189 | if (track2 >= 0) { |
1da177e4 | 190 | unregister_sound_special(track2); |
f87135f5 CL |
191 | snd_oss_minors[track2] = NULL; |
192 | } | |
6983b724 | 193 | snd_oss_minors[minor] = NULL; |
1da177e4 LT |
194 | up(&sound_oss_mutex); |
195 | kfree(mptr); | |
196 | return 0; | |
197 | } | |
198 | ||
199 | /* | |
200 | * INFO PART | |
201 | */ | |
202 | ||
203 | #ifdef CONFIG_PROC_FS | |
204 | ||
174c1f65 | 205 | static struct snd_info_entry *snd_minor_info_oss_entry = NULL; |
1da177e4 | 206 | |
2af677fc CL |
207 | static const char *snd_oss_device_type_name(int type) |
208 | { | |
209 | switch (type) { | |
210 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
211 | return "mixer"; | |
212 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
213 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
214 | return "sequencer"; | |
215 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
216 | return "digital audio"; | |
217 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
218 | return "raw midi"; | |
219 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
220 | return "hardware dependent"; | |
221 | default: | |
222 | return "?"; | |
223 | } | |
224 | } | |
225 | ||
174c1f65 TI |
226 | static void snd_minor_info_oss_read(struct snd_info_entry *entry, |
227 | struct snd_info_buffer *buffer) | |
1da177e4 | 228 | { |
6983b724 | 229 | int minor; |
174c1f65 | 230 | struct snd_minor *mptr; |
1da177e4 LT |
231 | |
232 | down(&sound_oss_mutex); | |
6983b724 CL |
233 | for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) { |
234 | if (!(mptr = snd_oss_minors[minor])) | |
235 | continue; | |
236 | if (mptr->card >= 0) | |
237 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor, | |
238 | mptr->card, mptr->device, | |
239 | snd_oss_device_type_name(mptr->type)); | |
240 | else | |
241 | snd_iprintf(buffer, "%3i: : %s\n", minor, | |
242 | snd_oss_device_type_name(mptr->type)); | |
1da177e4 LT |
243 | } |
244 | up(&sound_oss_mutex); | |
245 | } | |
246 | ||
247 | #endif /* CONFIG_PROC_FS */ | |
248 | ||
249 | int __init snd_minor_info_oss_init(void) | |
250 | { | |
251 | #ifdef CONFIG_PROC_FS | |
174c1f65 | 252 | struct snd_info_entry *entry; |
1da177e4 LT |
253 | |
254 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); | |
255 | if (entry) { | |
256 | entry->c.text.read_size = PAGE_SIZE; | |
257 | entry->c.text.read = snd_minor_info_oss_read; | |
258 | if (snd_info_register(entry) < 0) { | |
259 | snd_info_free_entry(entry); | |
260 | entry = NULL; | |
261 | } | |
262 | } | |
263 | snd_minor_info_oss_entry = entry; | |
264 | #endif | |
265 | return 0; | |
266 | } | |
267 | ||
268 | int __exit snd_minor_info_oss_done(void) | |
269 | { | |
270 | #ifdef CONFIG_PROC_FS | |
271 | if (snd_minor_info_oss_entry) | |
272 | snd_info_unregister(snd_minor_info_oss_entry); | |
273 | #endif | |
274 | return 0; | |
275 | } | |
276 | ||
1da177e4 | 277 | #endif /* CONFIG_SND_OSSEMUL */ |