release/src-rt-6.x.4708/linux/linux-2.6.36/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 <sound/initval.h>
  26
  27 MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
  28 MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
  29 MODULE_LICENSE("GPL");
  30
  31 /*----------------------------------------------------------------*/
  32
  33 /*
  34  * create a new hardware dependent device for Emu8000
  35  */
  36 static int snd_emu8000_new_device(struct snd_seq_device *dev)
  37 {
  38         struct snd_emu8000 *hw;
  39         struct snd_emux *emu;
  40
  41         hw = *(struct snd_emu8000**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
  42         if (hw == NULL)
  43                 return -EINVAL;
  44
  45         if (hw->emu)
  46                 return -EBUSY; /* already exists..? */
  47
  48         if (snd_emux_new(&emu) < 0)
  49                 return -ENOMEM;
  50
  51         hw->emu = emu;
  52         snd_emu8000_ops_setup(hw);
  53
  54         emu->hw = hw;
  55         emu->max_voices = EMU8000_DRAM_VOICES;
  56         emu->num_ports = hw->seq_ports;
  57
  58         if (hw->memhdr) {
  59                 snd_printk(KERN_ERR "memhdr is already initialized!?\n");
  60                 snd_util_memhdr_free(hw->memhdr);
  61         }
  62         hw->memhdr = snd_util_memhdr_new(hw->mem_size);
  63         if (hw->memhdr == NULL) {
  64                 snd_emux_free(emu);
  65                 hw->emu = NULL;
  66                 return -ENOMEM;
  67         }
  68
  69         emu->memhdr = hw->memhdr;
  70         emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
  71         emu->midi_devidx = 1;
  72         emu->linear_panning = 1;
  73         emu->hwdep_idx = 2; /* FIXED */
  74
  75         if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
  76                 snd_emux_free(emu);
  77                 snd_util_memhdr_free(hw->memhdr);
  78                 hw->emu = NULL;
  79                 hw->memhdr = NULL;
  80                 return -ENOMEM;
  81         }
  82
  83         if (hw->mem_size > 0)
  84                 snd_emu8000_pcm_new(dev->card, hw, 1);
  85
  86         dev->driver_data = hw;
  87
  88         return 0;
  89 }
  90
  91
  92 /*
  93  * free all resources
  94  */
  95 static int snd_emu8000_delete_device(struct snd_seq_device *dev)
  96 {
  97         struct snd_emu8000 *hw;
  98
  99         if (dev->driver_data == NULL)
 100                 return 0; /* no synth was allocated actually */
 101
 102         hw = dev->driver_data;
 103         if (hw->pcm)
 104                 snd_device_free(dev->card, hw->pcm);
 105         if (hw->emu)
 106                 snd_emux_free(hw->emu);
 107         if (hw->memhdr)
 108                 snd_util_memhdr_free(hw->memhdr);
 109         hw->emu = NULL;
 110         hw->memhdr = NULL;
 111         return 0;
 112 }
 113
 114 /*
 115  *  INIT part
 116  */
 117
 118 static int __init alsa_emu8000_init(void)
 119 {
 120
 121         static struct snd_seq_dev_ops ops = {
 122                 snd_emu8000_new_device,
 123                 snd_emu8000_delete_device,
 124         };
 125         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU8000, &ops,
 126                                               sizeof(struct snd_emu8000*));
 127 }
 128
 129 static void __exit alsa_emu8000_exit(void)
 130 {
 131         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU8000);
 132 }
 133
 134 module_init(alsa_emu8000_init)
 135 module_exit(alsa_emu8000_exit)