sound/isa/sb/emu8000_synth.c

   1 /*
   2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   3  *     and (c) 1999 Steve Ratcliffe <steve@parabola.demon.co.uk>
   4  *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
   5  *
   6  *  Emu8000 synth plug-in routine
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  */
  22
  23 #include "emu8000_local.h"
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <sound/initval.h>
  27
  28 MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
  29 MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
  30 MODULE_LICENSE("GPL");
  31
  32 /*----------------------------------------------------------------*/
  33
  34 /*
  35  * create a new hardware dependent device for Emu8000
  36  */
  37 static int snd_emu8000_new_device(struct snd_seq_device *dev)
  38 {
  39         struct snd_emu8000 *hw;
  40         struct snd_emux *emu;
  41
  42         hw = *(struct snd_emu8000**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
  43         if (hw == NULL)
  44                 return -EINVAL;
  45
  46         if (hw->emu)
  47                 return -EBUSY; /* already exists..? */
  48
  49         if (snd_emux_new(&emu) < 0)
  50                 return -ENOMEM;
  51
  52         hw->emu = emu;
  53         snd_emu8000_ops_setup(hw);
  54
  55         emu->hw = hw;
  56         emu->max_voices = EMU8000_DRAM_VOICES;
  57         emu->num_ports = hw->seq_ports;
  58
  59         if (hw->memhdr) {
  60                 snd_printk(KERN_ERR "memhdr is already initialized!?\n");
  61                 snd_util_memhdr_free(hw->memhdr);
  62         }
  63         hw->memhdr = snd_util_memhdr_new(hw->mem_size);
  64         if (hw->memhdr == NULL) {
  65                 snd_emux_free(emu);
  66                 hw->emu = NULL;
  67                 return -ENOMEM;
  68         }
  69
  70         emu->memhdr = hw->memhdr;
  71         emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
  72         emu->midi_devidx = 1;
  73         emu->linear_panning = 1;
  74         emu->hwdep_idx = 2; /* FIXED */
  75
  76         if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
  77                 snd_emux_free(emu);
  78                 snd_util_memhdr_free(hw->memhdr);
  79                 hw->emu = NULL;
  80                 hw->memhdr = NULL;
  81                 return -ENOMEM;
  82         }
  83
  84         if (hw->mem_size > 0)
  85                 snd_emu8000_pcm_new(dev->card, hw, 1);
  86
  87         dev->driver_data = hw;
  88
  89         return 0;
  90 }
  91
  92
  93 /*
  94  * free all resources
  95  */
  96 static int snd_emu8000_delete_device(struct snd_seq_device *dev)
  97 {
  98         struct snd_emu8000 *hw;
  99
 100         if (dev->driver_data == NULL)
 101                 return 0; /* no synth was allocated actually */
 102
 103         hw = dev->driver_data;
 104         if (hw->pcm)
 105                 snd_device_free(dev->card, hw->pcm);
 106         if (hw->emu)
 107                 snd_emux_free(hw->emu);
 108         if (hw->memhdr)
 109                 snd_util_memhdr_free(hw->memhdr);
 110         hw->emu = NULL;
 111         hw->memhdr = NULL;
 112         return 0;
 113 }
 114
 115 /*
 116  *  INIT part
 117  */
 118
 119 static int __init alsa_emu8000_init(void)
 120 {
 121
 122         static struct snd_seq_dev_ops ops = {
 123                 snd_emu8000_new_device,
 124                 snd_emu8000_delete_device,
 125         };
 126         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU8000, &ops,
 127                                               sizeof(struct snd_emu8000*));
 128 }
 129
 130 static void __exit alsa_emu8000_exit(void)
 131 {
 132         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU8000);
 133 }
 134
 135 module_init(alsa_emu8000_init)
 136 module_exit(alsa_emu8000_exit)