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_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
  83static 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
 109static 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
 119module_snd_seq_driver(emu10k1_synth_driver);
 120