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_probe(struct device *_dev)
  38 {
  39         struct snd_seq_device *dev = to_seq_dev(_dev);
  40         struct snd_emu8000 *hw;
  41         struct snd_emux *emu;
  42
  43         hw = *(struct snd_emu8000**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
  44         if (hw == NULL)
  45                 return -EINVAL;
  46
  47         if (hw->emu)
  48                 return -EBUSY; /* already exists..? */
  49
  50         if (snd_emux_new(&emu) < 0)
  51                 return -ENOMEM;
  52
  53         hw->emu = emu;
  54         snd_emu8000_ops_setup(hw);
  55
  56         emu->hw = hw;
  57         emu->max_voices = EMU8000_DRAM_VOICES;
  58         emu->num_ports = hw->seq_ports;
  59
  60         if (hw->memhdr) {
  61                 snd_printk(KERN_ERR "memhdr is already initialized!?\n");
  62                 snd_util_memhdr_free(hw->memhdr);
  63         }
  64         hw->memhdr = snd_util_memhdr_new(hw->mem_size);
  65         if (hw->memhdr == NULL) {
  66                 snd_emux_free(emu);
  67                 hw->emu = NULL;
  68                 return -ENOMEM;
  69         }
  70
  71         emu->memhdr = hw->memhdr;
  72         emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
  73         emu->midi_devidx = 1;
  74         emu->linear_panning = 1;
  75         emu->hwdep_idx = 2; /* FIXED */
  76
  77         if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
  78                 snd_emux_free(emu);
  79                 snd_util_memhdr_free(hw->memhdr);
  80                 hw->emu = NULL;
  81                 hw->memhdr = NULL;
  82                 return -ENOMEM;
  83         }
  84
  85         if (hw->mem_size > 0)
  86                 snd_emu8000_pcm_new(dev->card, hw, 1);
  87
  88         dev->driver_data = hw;
  89
  90         return 0;
  91 }
  92
  93
  94 /*
  95  * free all resources
  96  */
  97 static int snd_emu8000_remove(struct device *_dev)
  98 {
  99         struct snd_seq_device *dev = to_seq_dev(_dev);
 100         struct snd_emu8000 *hw;
 101
 102         if (dev->driver_data == NULL)
 103                 return 0; /* no synth was allocated actually */
 104
 105         hw = dev->driver_data;
 106         if (hw->pcm)
 107                 snd_device_free(dev->card, hw->pcm);
 108         snd_emux_free(hw->emu);
 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 struct snd_seq_driver emu8000_driver = {
 120         .driver = {
 121                 .name = KBUILD_MODNAME,
 122                 .probe = snd_emu8000_probe,
 123                 .remove = snd_emu8000_remove,
 124         },
 125         .id = SNDRV_SEQ_DEV_ID_EMU8000,
 126         .argsize = sizeof(struct snd_emu8000 *),
 127 };
 128
 129 module_snd_seq_driver(emu8000_driver);