sound/pci/emu10k1/emu10k1_synth.c

   1 /*
   2  *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
   3  *
   4  *  Routines for control of EMU10K1 WaveTable synth
   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 "emu10k1_synth_local.h"
  22 #include <linux/init.h>
  23 #include <linux/module.h>
  24
  25 MODULE_AUTHOR("Takashi Iwai");
  26 MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
  27 MODULE_LICENSE("GPL");
  28
  29 /*
  30  * create a new hardware dependent device for Emu10k1
  31  */
  32 static int snd_emu10k1_synth_new_device(struct snd_seq_device *dev)
  33 {
  34         struct snd_emux *emux;
  35         struct snd_emu10k1 *hw;
  36         struct snd_emu10k1_synth_arg *arg;
  37         unsigned long flags;
  38
  39         arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
  40         if (arg == NULL)
  41                 return -EINVAL;
  42
  43         if (arg->seq_ports <= 0)
  44                 return 0; /* nothing */
  45         if (arg->max_voices < 1)
  46                 arg->max_voices = 1;
  47         else if (arg->max_voices > 64)
  48                 arg->max_voices = 64;
  49
  50         if (snd_emux_new(&emux) < 0)
  51                 return -ENOMEM;
  52
  53         snd_emu10k1_ops_setup(emux);
  54         hw = arg->hwptr;
  55         emux->hw = hw;
  56         emux->max_voices = arg->max_voices;
  57         emux->num_ports = arg->seq_ports;
  58         emux->pitch_shift = -501;
  59         emux->memhdr = hw->memhdr;
  60         /* maximum two ports */
  61         emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
  62         /* audigy has two external midis */
  63         emux->midi_devidx = hw->audigy ? 2 : 1;
  64         emux->linear_panning = 0;
  65         emux->hwdep_idx = 2; /* FIXED */
  66
  67         if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
  68                 snd_emux_free(emux);
  69                 return -ENOMEM;
  70         }
  71
  72         spin_lock_irqsave(&hw->voice_lock, flags);
  73         hw->synth = emux;
  74         hw->get_synth_voice = snd_emu10k1_synth_get_voice;
  75         spin_unlock_irqrestore(&hw->voice_lock, flags);
  76
  77         dev->driver_data = emux;
  78
  79         return 0;
  80 }
  81
  82 static int snd_emu10k1_synth_delete_device(struct snd_seq_device *dev)
  83 {
  84         struct snd_emux *emux;
  85         struct snd_emu10k1 *hw;
  86         unsigned long flags;
  87
  88         if (dev->driver_data == NULL)
  89                 return 0; /* not registered actually */
  90
  91         emux = dev->driver_data;
  92
  93         hw = emux->hw;
  94         spin_lock_irqsave(&hw->voice_lock, flags);
  95         hw->synth = NULL;
  96         hw->get_synth_voice = NULL;
  97         spin_unlock_irqrestore(&hw->voice_lock, flags);
  98
  99         snd_emux_free(emux);
 100         return 0;
 101 }
 102
 103 /*
 104  *  INIT part
 105  */
 106
 107 static int __init alsa_emu10k1_synth_init(void)
 108 {
 109
 110         static struct snd_seq_dev_ops ops = {
 111                 snd_emu10k1_synth_new_device,
 112                 snd_emu10k1_synth_delete_device,
 113         };
 114         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH, &ops,
 115                                               sizeof(struct snd_emu10k1_synth_arg));
 116 }
 117
 118 static void __exit alsa_emu10k1_synth_exit(void)
 119 {
 120         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH);
 121 }
 122
 123 module_init(alsa_emu10k1_synth_init)
 124 module_exit(alsa_emu10k1_synth_exit)