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emu8000_synth.c

/*
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *     and (c) 1999 Steve Ratcliffe <steve@parabola.demon.co.uk>
 *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
 *
 *  Emu8000 synth plug-in routine
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include "emu8000_local.h"
#include <linux/init.h>
#include <sound/initval.h>

MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
MODULE_LICENSE("GPL");

/*----------------------------------------------------------------*/

/*
 * create a new hardware dependent device for Emu8000
 */
static int snd_emu8000_new_device(snd_seq_device_t *dev)
{
      emu8000_t *hw;
      snd_emux_t *emu;

      hw = *(emu8000_t**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
      if (hw == NULL)
            return -EINVAL;

      if (hw->emu)
            return -EBUSY; /* already exists..? */

      if (snd_emux_new(&emu) < 0)
            return -ENOMEM;

      hw->emu = emu;
      snd_emu8000_ops_setup(hw);

      emu->hw = hw;
      emu->max_voices = EMU8000_DRAM_VOICES;
      emu->num_ports = hw->seq_ports;

      if (hw->memhdr) {
            snd_printk(KERN_ERR "memhdr is already initialized!?\n");
            snd_util_memhdr_free(hw->memhdr);
      }
      hw->memhdr = snd_util_memhdr_new(hw->mem_size);
      if (hw->memhdr == NULL) {
            snd_emux_free(emu);
            hw->emu = NULL;
            return -ENOMEM;
      }

      emu->memhdr = hw->memhdr;
      emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
      emu->midi_devidx = 1;
      emu->linear_panning = 1;
      emu->hwdep_idx = 2; /* FIXED */

      if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
            snd_emux_free(emu);
            snd_util_memhdr_free(hw->memhdr);
            hw->emu = NULL;
            hw->memhdr = NULL;
            return -ENOMEM;
      }

      if (hw->mem_size > 0)
            snd_emu8000_pcm_new(dev->card, hw, 1);

      dev->driver_data = hw;

      return 0;
}


/*
 * free all resources
 */
static int snd_emu8000_delete_device(snd_seq_device_t *dev)
{
      emu8000_t *hw;

      if (dev->driver_data == NULL)
            return 0; /* no synth was allocated actually */

      hw = dev->driver_data;
      if (hw->pcm)
            snd_device_free(dev->card, hw->pcm);
      if (hw->emu)
            snd_emux_free(hw->emu);
      if (hw->memhdr)
            snd_util_memhdr_free(hw->memhdr);
      hw->emu = NULL;
      hw->memhdr = NULL;
      return 0;
}

/*
 *  INIT part
 */

static int __init alsa_emu8000_init(void)
{
      
      static snd_seq_dev_ops_t ops = {
            snd_emu8000_new_device,
            snd_emu8000_delete_device,
      };
      return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU8000, &ops, sizeof(emu8000_t*));
}

static void __exit alsa_emu8000_exit(void)
{
      snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU8000);
}

module_init(alsa_emu8000_init)
module_exit(alsa_emu8000_exit)

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