Commit | Line | Data |
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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> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/time.h> | |
31 | #include <sound/core.h> | |
32 | #include <sound/minors.h> | |
33 | #include <sound/info.h> | |
34 | #include <linux/sound.h> | |
1a60d4c5 | 35 | #include <linux/mutex.h> |
1da177e4 | 36 | |
6983b724 | 37 | #define SNDRV_OSS_MINORS 128 |
1da177e4 | 38 | |
6983b724 | 39 | static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS]; |
1a60d4c5 | 40 | static DEFINE_MUTEX(sound_oss_mutex); |
1da177e4 | 41 | |
f87135f5 CL |
42 | void *snd_lookup_oss_minor_data(unsigned int minor, int type) |
43 | { | |
44 | struct snd_minor *mreg; | |
45 | void *private_data; | |
46 | ||
3a63e444 | 47 | if (minor >= ARRAY_SIZE(snd_oss_minors)) |
f87135f5 | 48 | return NULL; |
1a60d4c5 | 49 | mutex_lock(&sound_oss_mutex); |
f87135f5 CL |
50 | mreg = snd_oss_minors[minor]; |
51 | if (mreg && mreg->type == type) | |
52 | private_data = mreg->private_data; | |
53 | else | |
54 | private_data = NULL; | |
1a60d4c5 | 55 | mutex_unlock(&sound_oss_mutex); |
f87135f5 CL |
56 | return private_data; |
57 | } | |
58 | ||
c0d3fb39 TI |
59 | EXPORT_SYMBOL(snd_lookup_oss_minor_data); |
60 | ||
174c1f65 | 61 | static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev) |
1da177e4 LT |
62 | { |
63 | int minor; | |
64 | ||
65 | switch (type) { | |
66 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
67 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
68 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); | |
69 | break; | |
70 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
71 | minor = SNDRV_MINOR_OSS_SEQUENCER; | |
72 | break; | |
73 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
74 | minor = SNDRV_MINOR_OSS_MUSIC; | |
75 | break; | |
76 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
77 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
78 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); | |
79 | break; | |
80 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
81 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
82 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); | |
83 | break; | |
84 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
85 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); | |
86 | break; | |
87 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: | |
88 | minor = SNDRV_MINOR_OSS_SNDSTAT; | |
89 | break; | |
90 | default: | |
91 | return -EINVAL; | |
92 | } | |
6983b724 | 93 | snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL); |
1da177e4 LT |
94 | return minor; |
95 | } | |
96 | ||
174c1f65 | 97 | int snd_register_oss_device(int type, struct snd_card *card, int dev, |
99ac48f5 | 98 | const struct file_operations *f_ops, void *private_data, |
f87135f5 | 99 | const char *name) |
1da177e4 LT |
100 | { |
101 | int minor = snd_oss_kernel_minor(type, card, dev); | |
102 | int minor_unit; | |
174c1f65 | 103 | struct snd_minor *preg; |
1da177e4 LT |
104 | int cidx = SNDRV_MINOR_OSS_CARD(minor); |
105 | int track2 = -1; | |
106 | int register1 = -1, register2 = -1; | |
7d2aae1e | 107 | struct device *carddev = snd_card_get_device_link(card); |
1da177e4 | 108 | |
d001544d CL |
109 | if (card && card->number >= 8) |
110 | return 0; /* ignore silently */ | |
1da177e4 LT |
111 | if (minor < 0) |
112 | return minor; | |
6983b724 | 113 | preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL); |
1da177e4 LT |
114 | if (preg == NULL) |
115 | return -ENOMEM; | |
2af677fc | 116 | preg->type = type; |
6983b724 | 117 | preg->card = card ? card->number : -1; |
1da177e4 | 118 | preg->device = dev; |
2af677fc | 119 | preg->f_ops = f_ops; |
f87135f5 | 120 | preg->private_data = private_data; |
1a60d4c5 | 121 | mutex_lock(&sound_oss_mutex); |
6983b724 | 122 | snd_oss_minors[minor] = preg; |
1da177e4 LT |
123 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); |
124 | switch (minor_unit) { | |
125 | case SNDRV_MINOR_OSS_PCM: | |
126 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
127 | break; | |
128 | case SNDRV_MINOR_OSS_MIDI: | |
129 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
130 | break; | |
131 | case SNDRV_MINOR_OSS_MIDI1: | |
132 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
133 | break; | |
134 | } | |
2af677fc | 135 | register1 = register_sound_special_device(f_ops, minor, carddev); |
1da177e4 LT |
136 | if (register1 != minor) |
137 | goto __end; | |
138 | if (track2 >= 0) { | |
2af677fc CL |
139 | register2 = register_sound_special_device(f_ops, track2, |
140 | carddev); | |
1da177e4 LT |
141 | if (register2 != track2) |
142 | goto __end; | |
f87135f5 | 143 | snd_oss_minors[track2] = preg; |
1da177e4 | 144 | } |
1a60d4c5 | 145 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
146 | return 0; |
147 | ||
148 | __end: | |
149 | if (register2 >= 0) | |
150 | unregister_sound_special(register2); | |
151 | if (register1 >= 0) | |
152 | unregister_sound_special(register1); | |
6983b724 | 153 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 154 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
155 | kfree(preg); |
156 | return -EBUSY; | |
157 | } | |
158 | ||
c0d3fb39 TI |
159 | EXPORT_SYMBOL(snd_register_oss_device); |
160 | ||
174c1f65 | 161 | int snd_unregister_oss_device(int type, struct snd_card *card, int dev) |
1da177e4 LT |
162 | { |
163 | int minor = snd_oss_kernel_minor(type, card, dev); | |
164 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | |
165 | int track2 = -1; | |
174c1f65 | 166 | struct snd_minor *mptr; |
1da177e4 | 167 | |
d001544d CL |
168 | if (card && card->number >= 8) |
169 | return 0; | |
1da177e4 LT |
170 | if (minor < 0) |
171 | return minor; | |
1a60d4c5 | 172 | mutex_lock(&sound_oss_mutex); |
6983b724 | 173 | mptr = snd_oss_minors[minor]; |
1da177e4 | 174 | if (mptr == NULL) { |
1a60d4c5 | 175 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
176 | return -ENOENT; |
177 | } | |
178 | unregister_sound_special(minor); | |
179 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { | |
180 | case SNDRV_MINOR_OSS_PCM: | |
181 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
182 | break; | |
183 | case SNDRV_MINOR_OSS_MIDI: | |
184 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
185 | break; | |
186 | case SNDRV_MINOR_OSS_MIDI1: | |
187 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
188 | break; | |
189 | } | |
f87135f5 | 190 | if (track2 >= 0) { |
1da177e4 | 191 | unregister_sound_special(track2); |
f87135f5 CL |
192 | snd_oss_minors[track2] = NULL; |
193 | } | |
6983b724 | 194 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 195 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
196 | kfree(mptr); |
197 | return 0; | |
198 | } | |
199 | ||
c0d3fb39 TI |
200 | EXPORT_SYMBOL(snd_unregister_oss_device); |
201 | ||
1da177e4 LT |
202 | /* |
203 | * INFO PART | |
204 | */ | |
205 | ||
206 | #ifdef CONFIG_PROC_FS | |
207 | ||
6581f4e7 | 208 | static struct snd_info_entry *snd_minor_info_oss_entry; |
1da177e4 | 209 | |
2af677fc CL |
210 | static const char *snd_oss_device_type_name(int type) |
211 | { | |
212 | switch (type) { | |
213 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
214 | return "mixer"; | |
215 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
216 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
217 | return "sequencer"; | |
218 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
219 | return "digital audio"; | |
220 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
221 | return "raw midi"; | |
222 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
223 | return "hardware dependent"; | |
224 | default: | |
225 | return "?"; | |
226 | } | |
227 | } | |
228 | ||
174c1f65 TI |
229 | static void snd_minor_info_oss_read(struct snd_info_entry *entry, |
230 | struct snd_info_buffer *buffer) | |
1da177e4 | 231 | { |
6983b724 | 232 | int minor; |
174c1f65 | 233 | struct snd_minor *mptr; |
1da177e4 | 234 | |
1a60d4c5 | 235 | mutex_lock(&sound_oss_mutex); |
6983b724 CL |
236 | for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) { |
237 | if (!(mptr = snd_oss_minors[minor])) | |
238 | continue; | |
239 | if (mptr->card >= 0) | |
240 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor, | |
241 | mptr->card, mptr->device, | |
242 | snd_oss_device_type_name(mptr->type)); | |
243 | else | |
244 | snd_iprintf(buffer, "%3i: : %s\n", minor, | |
245 | snd_oss_device_type_name(mptr->type)); | |
1da177e4 | 246 | } |
1a60d4c5 | 247 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
248 | } |
249 | ||
1da177e4 LT |
250 | |
251 | int __init snd_minor_info_oss_init(void) | |
252 | { | |
174c1f65 | 253 | struct snd_info_entry *entry; |
1da177e4 LT |
254 | |
255 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); | |
256 | if (entry) { | |
1da177e4 LT |
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; | |
1da177e4 LT |
264 | return 0; |
265 | } | |
266 | ||
267 | int __exit snd_minor_info_oss_done(void) | |
268 | { | |
746d4a02 | 269 | snd_info_free_entry(snd_minor_info_oss_entry); |
1da177e4 LT |
270 | return 0; |
271 | } | |
e28563cc | 272 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 273 | |
1da177e4 | 274 | #endif /* CONFIG_SND_OSSEMUL */ |