Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  Copyright (c) by Jaroslav Kysela <perex@perex.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(struct snd_seq_device *dev)

{

        struct snd_emu8000 *hw;

        struct snd_emux *emu;

        hw = *(struct snd_emu8000**)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(struct snd_seq_device *dev)

{

        struct snd_emu8000 *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 struct snd_seq_dev_ops ops = {

                snd_emu8000_new_device,

                snd_emu8000_delete_device,

        };

        return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU8000, &ops,

                                              sizeof(struct snd_emu8000*));

}

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)