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

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