LXR linux/sound/pci/emu10k1/emu10k1

   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
  25MODULE_AUTHOR("Takashi Iwai");
  26MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
  27MODULE_LICENSE("GPL");
  28
  29/*
  30 * create a new hardware dependent device for Emu10k1
  31 */
  32static 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
  82static 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
 107static 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
 118static void __exit alsa_emu10k1_synth_exit(void)
 119{
 120        snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH);
 121}
 122
 123module_init(alsa_emu10k1_synth_init)
 124module_exit(alsa_emu10k1_synth_exit)
 125