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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 #ifdef CONFIG_SND_SEQUENCER_OSS
 51         emu->oss_synth = NULL;
 52 #endif
 53         emu->max_voices = 0;
 54         emu->use_time = 0;
 55 
 56         init_timer(&emu->tlist);
 57         emu->tlist.function = snd_emux_timer_callback;
 58         emu->tlist.data = (unsigned long)emu;
 59         emu->timer_active = 0;
 60 
 61         *remu = emu;
 62         return 0;
 63 }
 64 
 65 EXPORT_SYMBOL(snd_emux_new);
 66 
 67 /*
 68  */
 69 static int sf_sample_new(void *private_data, struct snd_sf_sample *sp,
 70                                   struct snd_util_memhdr *hdr,
 71                                   const void __user *buf, long count)
 72 {
 73         struct snd_emux *emu = private_data;
 74         return emu->ops.sample_new(emu, sp, hdr, buf, count);
 75         
 76 }
 77 
 78 static int sf_sample_free(void *private_data, struct snd_sf_sample *sp,
 79                                    struct snd_util_memhdr *hdr)
 80 {
 81         struct snd_emux *emu = private_data;
 82         return emu->ops.sample_free(emu, sp, hdr);
 83         
 84 }
 85 
 86 static void sf_sample_reset(void *private_data)
 87 {
 88         struct snd_emux *emu = private_data;
 89         emu->ops.sample_reset(emu);
 90 }
 91 
 92 int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, char *name)
 93 {
 94         int err;
 95         struct snd_sf_callback sf_cb;
 96 
 97         if (snd_BUG_ON(!emu->hw || emu->max_voices <= 0))
 98                 return -EINVAL;
 99         if (snd_BUG_ON(!card || !name))
100                 return -EINVAL;
101 
102         emu->card = card;
103         emu->name = kstrdup(name, GFP_KERNEL);
104         emu->voices = kcalloc(emu->max_voices, sizeof(struct snd_emux_voice),
105                               GFP_KERNEL);
106         if (emu->voices == NULL)
107                 return -ENOMEM;
108 
109         /* create soundfont list */
110         memset(&sf_cb, 0, sizeof(sf_cb));
111         sf_cb.private_data = emu;
112         if (emu->ops.sample_new)
113                 sf_cb.sample_new = sf_sample_new;
114         if (emu->ops.sample_free)
115                 sf_cb.sample_free = sf_sample_free;
116         if (emu->ops.sample_reset)
117                 sf_cb.sample_reset = sf_sample_reset;
118         emu->sflist = snd_sf_new(&sf_cb, emu->memhdr);
119         if (emu->sflist == NULL)
120                 return -ENOMEM;
121 
122         if ((err = snd_emux_init_hwdep(emu)) < 0)
123                 return err;
124 
125         snd_emux_init_voices(emu);
126 
127         snd_emux_init_seq(emu, card, index);
128 #ifdef CONFIG_SND_SEQUENCER_OSS
129         snd_emux_init_seq_oss(emu);
130 #endif
131         snd_emux_init_virmidi(emu, card);
132 
133 #ifdef CONFIG_PROC_FS
134         snd_emux_proc_init(emu, card, index);
135 #endif
136         return 0;
137 }
138 
139 EXPORT_SYMBOL(snd_emux_register);
140 
141 /*
142  */
143 int snd_emux_free(struct snd_emux *emu)
144 {
145         unsigned long flags;
146 
147         if (! emu)
148                 return -EINVAL;
149 
150         spin_lock_irqsave(&emu->voice_lock, flags);
151         if (emu->timer_active)
152                 del_timer(&emu->tlist);
153         spin_unlock_irqrestore(&emu->voice_lock, flags);
154 
155 #ifdef CONFIG_PROC_FS
156         snd_emux_proc_free(emu);
157 #endif
158         snd_emux_delete_virmidi(emu);
159 #ifdef CONFIG_SND_SEQUENCER_OSS
160         snd_emux_detach_seq_oss(emu);
161 #endif
162         snd_emux_detach_seq(emu);
163 
164         snd_emux_delete_hwdep(emu);
165 
166         if (emu->sflist)
167                 snd_sf_free(emu->sflist);
168 
169         kfree(emu->voices);
170         kfree(emu->name);
171         kfree(emu);
172         return 0;
173 }
174 
175 EXPORT_SYMBOL(snd_emux_free);
176 
177 
178 /*
179  *  INIT part
180  */
181 
182 static int __init alsa_emux_init(void)
183 {
184         return 0;
185 }
186 
187 static void __exit alsa_emux_exit(void)
188 {
189 }
190 
191 module_init(alsa_emux_init)
192 module_exit(alsa_emux_exit)
193 

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