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Linux/sound/synth/emux/emux.c

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  1 /*
  2  *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
  3  *
  4  *  Routines for control of EMU WaveTable chip
  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 #include <linux/wait.h>
 22 #include <linux/slab.h>
 23 #include <linux/string.h>
 24 #include <sound/core.h>
 25 #include <sound/emux_synth.h>
 26 #include <linux/init.h>
 27 #include "emux_voice.h"
 28 
 29 MODULE_AUTHOR("Takashi Iwai");
 30 MODULE_DESCRIPTION("Routines for control of EMU WaveTable chip");
 31 MODULE_LICENSE("GPL");
 32 
 33 /*
 34  * create a new hardware dependent device for Emu8000/Emu10k1
 35  */
 36 int snd_emux_new(struct snd_emux **remu)
 37 {
 38         struct snd_emux *emu;
 39 
 40         *remu = NULL;
 41         emu = kzalloc(sizeof(*emu), GFP_KERNEL);
 42         if (emu == NULL)
 43                 return -ENOMEM;
 44 
 45         spin_lock_init(&emu->voice_lock);
 46         mutex_init(&emu->register_mutex);
 47 
 48         emu->client = -1;
 49 #ifdef CONFIG_SND_SEQUENCER_OSS
 50         emu->oss_synth = NULL;
 51 #endif
 52         emu->max_voices = 0;
 53         emu->use_time = 0;
 54 
 55         init_timer(&emu->tlist);
 56         emu->tlist.function = snd_emux_timer_callback;
 57         emu->tlist.data = (unsigned long)emu;
 58         emu->timer_active = 0;
 59 
 60         *remu = emu;
 61         return 0;
 62 }
 63 
 64 EXPORT_SYMBOL(snd_emux_new);
 65 
 66 /*
 67  */
 68 static int sf_sample_new(void *private_data, struct snd_sf_sample *sp,
 69                                   struct snd_util_memhdr *hdr,
 70                                   const void __user *buf, long count)
 71 {
 72         struct snd_emux *emu = private_data;
 73         return emu->ops.sample_new(emu, sp, hdr, buf, count);
 74         
 75 }
 76 
 77 static int sf_sample_free(void *private_data, struct snd_sf_sample *sp,
 78                                    struct snd_util_memhdr *hdr)
 79 {
 80         struct snd_emux *emu = private_data;
 81         return emu->ops.sample_free(emu, sp, hdr);
 82         
 83 }
 84 
 85 static void sf_sample_reset(void *private_data)
 86 {
 87         struct snd_emux *emu = private_data;
 88         emu->ops.sample_reset(emu);
 89 }
 90 
 91 int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, char *name)
 92 {
 93         int err;
 94         struct snd_sf_callback sf_cb;
 95 
 96         if (snd_BUG_ON(!emu->hw || emu->max_voices <= 0))
 97                 return -EINVAL;
 98         if (snd_BUG_ON(!card || !name))
 99                 return -EINVAL;
100 
101         emu->card = card;
102         emu->name = kstrdup(name, GFP_KERNEL);
103         emu->voices = kcalloc(emu->max_voices, sizeof(struct snd_emux_voice),
104                               GFP_KERNEL);
105         if (emu->voices == NULL)
106                 return -ENOMEM;
107 
108         /* create soundfont list */
109         memset(&sf_cb, 0, sizeof(sf_cb));
110         sf_cb.private_data = emu;
111         if (emu->ops.sample_new)
112                 sf_cb.sample_new = sf_sample_new;
113         if (emu->ops.sample_free)
114                 sf_cb.sample_free = sf_sample_free;
115         if (emu->ops.sample_reset)
116                 sf_cb.sample_reset = sf_sample_reset;
117         emu->sflist = snd_sf_new(&sf_cb, emu->memhdr);
118         if (emu->sflist == NULL)
119                 return -ENOMEM;
120 
121         if ((err = snd_emux_init_hwdep(emu)) < 0)
122                 return err;
123 
124         snd_emux_init_voices(emu);
125 
126         snd_emux_init_seq(emu, card, index);
127 #ifdef CONFIG_SND_SEQUENCER_OSS
128         snd_emux_init_seq_oss(emu);
129 #endif
130         snd_emux_init_virmidi(emu, card);
131 
132 #ifdef CONFIG_PROC_FS
133         snd_emux_proc_init(emu, card, index);
134 #endif
135         return 0;
136 }
137 
138 EXPORT_SYMBOL(snd_emux_register);
139 
140 /*
141  */
142 int snd_emux_free(struct snd_emux *emu)
143 {
144         unsigned long flags;
145 
146         if (! emu)
147                 return -EINVAL;
148 
149         spin_lock_irqsave(&emu->voice_lock, flags);
150         if (emu->timer_active)
151                 del_timer(&emu->tlist);
152         spin_unlock_irqrestore(&emu->voice_lock, flags);
153 
154 #ifdef CONFIG_PROC_FS
155         snd_emux_proc_free(emu);
156 #endif
157         snd_emux_delete_virmidi(emu);
158 #ifdef CONFIG_SND_SEQUENCER_OSS
159         snd_emux_detach_seq_oss(emu);
160 #endif
161         snd_emux_detach_seq(emu);
162 
163         snd_emux_delete_hwdep(emu);
164 
165         if (emu->sflist)
166                 snd_sf_free(emu->sflist);
167 
168         kfree(emu->voices);
169         kfree(emu->name);
170         kfree(emu);
171         return 0;
172 }
173 
174 EXPORT_SYMBOL(snd_emux_free);
175 
176 
177 /*
178  *  INIT part
179  */
180 
181 static int __init alsa_emux_init(void)
182 {
183         return 0;
184 }
185 
186 static void __exit alsa_emux_exit(void)
187 {
188 }
189 
190 module_init(alsa_emux_init)
191 module_exit(alsa_emux_exit)
192 

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