release/src-rt-6.x/linux/linux-2.6/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
  24 MODULE_AUTHOR("Takashi Iwai");
  25 MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
  26 MODULE_LICENSE("GPL");
  27
  28 /*
  29  * create a new hardware dependent device for Emu10k1
  30  */
  31 static int snd_emu10k1_synth_new_device(struct snd_seq_device *dev)
  32 {
  33         struct snd_emux *emu;
  34         struct snd_emu10k1 *hw;
  35         struct snd_emu10k1_synth_arg *arg;
  36         unsigned long flags;
  37
  38         arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
  39         if (arg == NULL)
  40                 return -EINVAL;
  41
  42         if (arg->seq_ports <= 0)
  43                 return 0; /* nothing */
  44         if (arg->max_voices < 1)
  45                 arg->max_voices = 1;
  46         else if (arg->max_voices > 64)
  47                 arg->max_voices = 64;
  48
  49         if (snd_emux_new(&emu) < 0)
  50                 return -ENOMEM;
  51
  52         snd_emu10k1_ops_setup(emu);
  53         emu->hw = hw = arg->hwptr;
  54         emu->max_voices = arg->max_voices;
  55         emu->num_ports = arg->seq_ports;
  56         emu->pitch_shift = -501;
  57         emu->memhdr = hw->memhdr;
  58         emu->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2; /* maximum two ports */
  59         emu->midi_devidx = hw->audigy ? 2 : 1; /* audigy has two external midis */
  60         emu->linear_panning = 0;
  61         emu->hwdep_idx = 2; /* FIXED */
  62
  63         if (snd_emux_register(emu, dev->card, arg->index, "Emu10k1") < 0) {
  64                 snd_emux_free(emu);
  65                 return -ENOMEM;
  66         }
  67
  68         spin_lock_irqsave(&hw->voice_lock, flags);
  69         hw->synth = emu;
  70         hw->get_synth_voice = snd_emu10k1_synth_get_voice;
  71         spin_unlock_irqrestore(&hw->voice_lock, flags);
  72
  73         dev->driver_data = emu;
  74
  75         return 0;
  76 }
  77
  78 static int snd_emu10k1_synth_delete_device(struct snd_seq_device *dev)
  79 {
  80         struct snd_emux *emu;
  81         struct snd_emu10k1 *hw;
  82         unsigned long flags;
  83
  84         if (dev->driver_data == NULL)
  85                 return 0; /* not registered actually */
  86
  87         emu = dev->driver_data;
  88
  89         hw = emu->hw;
  90         spin_lock_irqsave(&hw->voice_lock, flags);
  91         hw->synth = NULL;
  92         hw->get_synth_voice = NULL;
  93         spin_unlock_irqrestore(&hw->voice_lock, flags);
  94
  95         snd_emux_free(emu);
  96         return 0;
  97 }
  98
  99 /*
 100  *  INIT part
 101  */
 102
 103 static int __init alsa_emu10k1_synth_init(void)
 104 {
 105
 106         static struct snd_seq_dev_ops ops = {
 107                 snd_emu10k1_synth_new_device,
 108                 snd_emu10k1_synth_delete_device,
 109         };
 110         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH, &ops,
 111                                               sizeof(struct snd_emu10k1_synth_arg));
 112 }
 113
 114 static void __exit alsa_emu10k1_synth_exit(void)
 115 {
 116         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH);
 117 }
 118
 119 module_init(alsa_emu10k1_synth_init)
 120 module_exit(alsa_emu10k1_synth_exit)