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1da177e4 LT |
1 | /* |
2 | * Advanced Linux Sound Architecture | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
d81a6d71 | 29 | #include <linux/export.h> |
1da177e4 LT |
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> | |
1a60d4c5 | 36 | #include <linux/mutex.h> |
1da177e4 | 37 | |
779ae5a0 | 38 | #define SNDRV_OSS_MINORS 256 |
1da177e4 | 39 | |
6983b724 | 40 | static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS]; |
1a60d4c5 | 41 | static DEFINE_MUTEX(sound_oss_mutex); |
1da177e4 | 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 | ||
3a63e444 | 48 | if (minor >= ARRAY_SIZE(snd_oss_minors)) |
f87135f5 | 49 | return NULL; |
1a60d4c5 | 50 | mutex_lock(&sound_oss_mutex); |
f87135f5 CL |
51 | mreg = snd_oss_minors[minor]; |
52 | if (mreg && mreg->type == type) | |
53 | private_data = mreg->private_data; | |
54 | else | |
55 | private_data = NULL; | |
1a60d4c5 | 56 | mutex_unlock(&sound_oss_mutex); |
f87135f5 CL |
57 | return private_data; |
58 | } | |
59 | ||
c0d3fb39 TI |
60 | EXPORT_SYMBOL(snd_lookup_oss_minor_data); |
61 | ||
174c1f65 | 62 | static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev) |
1da177e4 LT |
63 | { |
64 | int minor; | |
65 | ||
66 | switch (type) { | |
67 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
7eaa943c TI |
68 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
69 | return -EINVAL; | |
1da177e4 LT |
70 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); |
71 | break; | |
72 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
73 | minor = SNDRV_MINOR_OSS_SEQUENCER; | |
74 | break; | |
75 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
76 | minor = SNDRV_MINOR_OSS_MUSIC; | |
77 | break; | |
78 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
7eaa943c TI |
79 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
80 | return -EINVAL; | |
1da177e4 LT |
81 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); |
82 | break; | |
83 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
7eaa943c TI |
84 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
85 | return -EINVAL; | |
1da177e4 LT |
86 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); |
87 | break; | |
88 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
89 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); | |
90 | break; | |
91 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: | |
92 | minor = SNDRV_MINOR_OSS_SNDSTAT; | |
93 | break; | |
94 | default: | |
95 | return -EINVAL; | |
96 | } | |
808c569f | 97 | if (minor < 0 || minor >= SNDRV_OSS_MINORS) |
7eaa943c | 98 | return -EINVAL; |
1da177e4 LT |
99 | return minor; |
100 | } | |
101 | ||
174c1f65 | 102 | int snd_register_oss_device(int type, struct snd_card *card, int dev, |
99ac48f5 | 103 | const struct file_operations *f_ops, void *private_data, |
f87135f5 | 104 | const char *name) |
1da177e4 LT |
105 | { |
106 | int minor = snd_oss_kernel_minor(type, card, dev); | |
107 | int minor_unit; | |
174c1f65 | 108 | struct snd_minor *preg; |
1da177e4 LT |
109 | int cidx = SNDRV_MINOR_OSS_CARD(minor); |
110 | int track2 = -1; | |
111 | int register1 = -1, register2 = -1; | |
7d2aae1e | 112 | struct device *carddev = snd_card_get_device_link(card); |
1da177e4 | 113 | |
779ae5a0 | 114 | if (card && card->number >= SNDRV_MINOR_OSS_DEVICES) |
d001544d | 115 | return 0; /* ignore silently */ |
1da177e4 LT |
116 | if (minor < 0) |
117 | return minor; | |
6983b724 | 118 | preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL); |
1da177e4 LT |
119 | if (preg == NULL) |
120 | return -ENOMEM; | |
2af677fc | 121 | preg->type = type; |
6983b724 | 122 | preg->card = card ? card->number : -1; |
1da177e4 | 123 | preg->device = dev; |
2af677fc | 124 | preg->f_ops = f_ops; |
f87135f5 | 125 | preg->private_data = private_data; |
1a60d4c5 | 126 | mutex_lock(&sound_oss_mutex); |
6983b724 | 127 | snd_oss_minors[minor] = preg; |
1da177e4 LT |
128 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); |
129 | switch (minor_unit) { | |
130 | case SNDRV_MINOR_OSS_PCM: | |
131 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
132 | break; | |
133 | case SNDRV_MINOR_OSS_MIDI: | |
134 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
135 | break; | |
136 | case SNDRV_MINOR_OSS_MIDI1: | |
137 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
138 | break; | |
139 | } | |
2af677fc | 140 | register1 = register_sound_special_device(f_ops, minor, carddev); |
1da177e4 LT |
141 | if (register1 != minor) |
142 | goto __end; | |
143 | if (track2 >= 0) { | |
2af677fc CL |
144 | register2 = register_sound_special_device(f_ops, track2, |
145 | carddev); | |
1da177e4 LT |
146 | if (register2 != track2) |
147 | goto __end; | |
f87135f5 | 148 | snd_oss_minors[track2] = preg; |
1da177e4 | 149 | } |
1a60d4c5 | 150 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
151 | return 0; |
152 | ||
153 | __end: | |
154 | if (register2 >= 0) | |
155 | unregister_sound_special(register2); | |
156 | if (register1 >= 0) | |
157 | unregister_sound_special(register1); | |
6983b724 | 158 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 159 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
160 | kfree(preg); |
161 | return -EBUSY; | |
162 | } | |
163 | ||
c0d3fb39 TI |
164 | EXPORT_SYMBOL(snd_register_oss_device); |
165 | ||
174c1f65 | 166 | int snd_unregister_oss_device(int type, struct snd_card *card, int dev) |
1da177e4 LT |
167 | { |
168 | int minor = snd_oss_kernel_minor(type, card, dev); | |
169 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | |
170 | int track2 = -1; | |
174c1f65 | 171 | struct snd_minor *mptr; |
1da177e4 | 172 | |
779ae5a0 | 173 | if (card && card->number >= SNDRV_MINOR_OSS_DEVICES) |
d001544d | 174 | return 0; |
1da177e4 LT |
175 | if (minor < 0) |
176 | return minor; | |
1a60d4c5 | 177 | mutex_lock(&sound_oss_mutex); |
6983b724 | 178 | mptr = snd_oss_minors[minor]; |
1da177e4 | 179 | if (mptr == NULL) { |
1a60d4c5 | 180 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
181 | return -ENOENT; |
182 | } | |
183 | unregister_sound_special(minor); | |
184 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { | |
185 | case SNDRV_MINOR_OSS_PCM: | |
186 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
187 | break; | |
188 | case SNDRV_MINOR_OSS_MIDI: | |
189 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
190 | break; | |
191 | case SNDRV_MINOR_OSS_MIDI1: | |
192 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
193 | break; | |
194 | } | |
f87135f5 | 195 | if (track2 >= 0) { |
1da177e4 | 196 | unregister_sound_special(track2); |
f87135f5 CL |
197 | snd_oss_minors[track2] = NULL; |
198 | } | |
6983b724 | 199 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 200 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
201 | kfree(mptr); |
202 | return 0; | |
203 | } | |
204 | ||
c0d3fb39 TI |
205 | EXPORT_SYMBOL(snd_unregister_oss_device); |
206 | ||
1da177e4 LT |
207 | /* |
208 | * INFO PART | |
209 | */ | |
210 | ||
211 | #ifdef CONFIG_PROC_FS | |
212 | ||
6581f4e7 | 213 | static struct snd_info_entry *snd_minor_info_oss_entry; |
1da177e4 | 214 | |
2af677fc CL |
215 | static const char *snd_oss_device_type_name(int type) |
216 | { | |
217 | switch (type) { | |
218 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
219 | return "mixer"; | |
220 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
221 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
222 | return "sequencer"; | |
223 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
224 | return "digital audio"; | |
225 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
226 | return "raw midi"; | |
227 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
228 | return "hardware dependent"; | |
229 | default: | |
230 | return "?"; | |
231 | } | |
232 | } | |
233 | ||
174c1f65 TI |
234 | static void snd_minor_info_oss_read(struct snd_info_entry *entry, |
235 | struct snd_info_buffer *buffer) | |
1da177e4 | 236 | { |
6983b724 | 237 | int minor; |
174c1f65 | 238 | struct snd_minor *mptr; |
1da177e4 | 239 | |
1a60d4c5 | 240 | mutex_lock(&sound_oss_mutex); |
6983b724 CL |
241 | for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) { |
242 | if (!(mptr = snd_oss_minors[minor])) | |
243 | continue; | |
244 | if (mptr->card >= 0) | |
245 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor, | |
246 | mptr->card, mptr->device, | |
247 | snd_oss_device_type_name(mptr->type)); | |
248 | else | |
249 | snd_iprintf(buffer, "%3i: : %s\n", minor, | |
250 | snd_oss_device_type_name(mptr->type)); | |
1da177e4 | 251 | } |
1a60d4c5 | 252 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
253 | } |
254 | ||
1da177e4 LT |
255 | |
256 | int __init snd_minor_info_oss_init(void) | |
257 | { | |
174c1f65 | 258 | struct snd_info_entry *entry; |
1da177e4 LT |
259 | |
260 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); | |
261 | if (entry) { | |
1da177e4 LT |
262 | entry->c.text.read = snd_minor_info_oss_read; |
263 | if (snd_info_register(entry) < 0) { | |
264 | snd_info_free_entry(entry); | |
265 | entry = NULL; | |
266 | } | |
267 | } | |
268 | snd_minor_info_oss_entry = entry; | |
1da177e4 LT |
269 | return 0; |
270 | } | |
271 | ||
272 | int __exit snd_minor_info_oss_done(void) | |
273 | { | |
746d4a02 | 274 | snd_info_free_entry(snd_minor_info_oss_entry); |
1da177e4 LT |
275 | return 0; |
276 | } | |
e28563cc | 277 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 278 | |
1da177e4 | 279 | #endif /* CONFIG_SND_OSSEMUL */ |