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_probe(struct device *_dev)
  33 {
  34         struct snd_seq_device *dev = to_seq_dev(_dev);
  35         struct snd_emux *emux;
  36         struct snd_emu10k1 *hw;
  37         struct snd_emu10k1_synth_arg *arg;
  38         unsigned long flags;
  39
  40         arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
  41         if (arg == NULL)
  42                 return -EINVAL;
  43
  44         if (arg->seq_ports <= 0)
  45                 return 0; /* nothing */
  46         if (arg->max_voices < 1)
  47                 arg->max_voices = 1;
  48         else if (arg->max_voices > 64)
  49                 arg->max_voices = 64;
  50
  51         if (snd_emux_new(&emux) < 0)
  52                 return -ENOMEM;
  53
  54         snd_emu10k1_ops_setup(emux);
  55         hw = arg->hwptr;
  56         emux->hw = hw;
  57         emux->max_voices = arg->max_voices;
  58         emux->num_ports = arg->seq_ports;
  59         emux->pitch_shift = -501;
  60         emux->memhdr = hw->memhdr;
  61         /* maximum two ports */
  62         emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
  63         /* audigy has two external midis */
  64         emux->midi_devidx = hw->audigy ? 2 : 1;
  65         emux->linear_panning = 0;
  66         emux->hwdep_idx = 2; /* FIXED */
  67
  68         if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
  69                 snd_emux_free(emux);
  70                 return -ENOMEM;
  71         }
  72
  73         spin_lock_irqsave(&hw->voice_lock, flags);
  74         hw->synth = emux;
  75         hw->get_synth_voice = snd_emu10k1_synth_get_voice;
  76         spin_unlock_irqrestore(&hw->voice_lock, flags);
  77
  78         dev->driver_data = emux;
  79
  80         return 0;
  81 }
  82
  83 static int snd_emu10k1_synth_remove(struct device *_dev)
  84 {
  85         struct snd_seq_device *dev = to_seq_dev(_dev);
  86         struct snd_emux *emux;
  87         struct snd_emu10k1 *hw;
  88         unsigned long flags;
  89
  90         if (dev->driver_data == NULL)
  91                 return 0; /* not registered actually */
  92
  93         emux = dev->driver_data;
  94
  95         hw = emux->hw;
  96         spin_lock_irqsave(&hw->voice_lock, flags);
  97         hw->synth = NULL;
  98         hw->get_synth_voice = NULL;
  99         spin_unlock_irqrestore(&hw->voice_lock, flags);
 100
 101         snd_emux_free(emux);
 102         return 0;
 103 }
 104
 105 /*
 106  *  INIT part
 107  */
 108
 109 static struct snd_seq_driver emu10k1_synth_driver = {
 110         .driver = {
 111                 .name = KBUILD_MODNAME,
 112                 .probe = snd_emu10k1_synth_probe,
 113                 .remove = snd_emu10k1_synth_remove,
 114         },
 115         .id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
 116         .argsize = sizeof(struct snd_emu10k1_synth_arg),
 117 };
 118
 119 module_snd_seq_driver(emu10k1_synth_driver);