emu10k1_synth.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
   4  *
   5  *  Routines for control of EMU10K1 WaveTable synth
   6  */
   7
   8 #include "emu10k1_synth_local.h"
   9 #include <linux/init.h>
  10 #include <linux/module.h>
  11
  12 MODULE_AUTHOR("Takashi Iwai");
  13 MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
  14 MODULE_LICENSE("GPL");
  15
  16 /*
  17  * create a new hardware dependent device for Emu10k1
  18  */
  19 static int snd_emu10k1_synth_probe(struct device *_dev)
  20 {
  21         struct snd_seq_device *dev = to_seq_dev(_dev);
  22         struct snd_emux *emux;
  23         struct snd_emu10k1 *hw;
  24         struct snd_emu10k1_synth_arg *arg;
  25
  26         arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
  27         if (arg == NULL)
  28                 return -EINVAL;
  29
  30         if (arg->seq_ports <= 0)
  31                 return 0; /* nothing */
  32         if (arg->max_voices < 1)
  33                 arg->max_voices = 1;
  34         else if (arg->max_voices > 64)
  35                 arg->max_voices = 64;
  36
  37         if (snd_emux_new(&emux) < 0)
  38                 return -ENOMEM;
  39
  40         snd_emu10k1_ops_setup(emux);
  41         hw = arg->hwptr;
  42         emux->hw = hw;
  43         emux->max_voices = arg->max_voices;
  44         emux->num_ports = arg->seq_ports;
  45         emux->memhdr = hw->memhdr;
  46         /* maximum two ports */
  47         emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
  48         /* audigy has two external midis */
  49         emux->midi_devidx = hw->audigy ? 2 : 1;
  50         emux->linear_panning = 0;
  51         emux->hwdep_idx = 2; /* FIXED */
  52
  53         if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
  54                 snd_emux_free(emux);
  55                 return -ENOMEM;
  56         }
  57
  58         spin_lock_irq(&hw->voice_lock);
  59         hw->synth = emux;
  60         hw->get_synth_voice = snd_emu10k1_synth_get_voice;
  61         spin_unlock_irq(&hw->voice_lock);
  62
  63         dev->driver_data = emux;
  64
  65         return 0;
  66 }
  67
  68 static int snd_emu10k1_synth_remove(struct device *_dev)
  69 {
  70         struct snd_seq_device *dev = to_seq_dev(_dev);
  71         struct snd_emux *emux;
  72         struct snd_emu10k1 *hw;
  73
  74         if (dev->driver_data == NULL)
  75                 return 0; /* not registered actually */
  76
  77         emux = dev->driver_data;
  78
  79         hw = emux->hw;
  80         spin_lock_irq(&hw->voice_lock);
  81         hw->synth = NULL;
  82         hw->get_synth_voice = NULL;
  83         spin_unlock_irq(&hw->voice_lock);
  84
  85         snd_emux_free(emux);
  86         return 0;
  87 }
  88
  89 /*
  90  *  INIT part
  91  */
  92
  93 static struct snd_seq_driver emu10k1_synth_driver = {
  94         .driver = {
  95                 .name = KBUILD_MODNAME,
  96                 .probe = snd_emu10k1_synth_probe,
  97                 .remove = snd_emu10k1_synth_remove,
  98         },
  99         .id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
 100         .argsize = sizeof(struct snd_emu10k1_synth_arg),
 101 };
 102
 103 module_snd_seq_driver(emu10k1_synth_driver);