sound/pci/emu10k1/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         unsigned long flags;
  26
  27         arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
  28         if (arg == NULL)
  29                 return -EINVAL;
  30
  31         if (arg->seq_ports <= 0)
  32                 return 0; /* nothing */
  33         if (arg->max_voices < 1)
  34                 arg->max_voices = 1;
  35         else if (arg->max_voices > 64)
  36                 arg->max_voices = 64;
  37
  38         if (snd_emux_new(&emux) < 0)
  39                 return -ENOMEM;
  40
  41         snd_emu10k1_ops_setup(emux);
  42         hw = arg->hwptr;
  43         emux->hw = hw;
  44         emux->max_voices = arg->max_voices;
  45         emux->num_ports = arg->seq_ports;
  46         emux->pitch_shift = -501;
  47         emux->memhdr = hw->memhdr;
  48         /* maximum two ports */
  49         emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
  50         /* audigy has two external midis */
  51         emux->midi_devidx = hw->audigy ? 2 : 1;
  52         emux->linear_panning = 0;
  53         emux->hwdep_idx = 2; /* FIXED */
  54
  55         if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
  56                 snd_emux_free(emux);
  57                 return -ENOMEM;
  58         }
  59
  60         spin_lock_irqsave(&hw->voice_lock, flags);
  61         hw->synth = emux;
  62         hw->get_synth_voice = snd_emu10k1_synth_get_voice;
  63         spin_unlock_irqrestore(&hw->voice_lock, flags);
  64
  65         dev->driver_data = emux;
  66
  67         return 0;
  68 }
  69
  70 static int snd_emu10k1_synth_remove(struct device *_dev)
  71 {
  72         struct snd_seq_device *dev = to_seq_dev(_dev);
  73         struct snd_emux *emux;
  74         struct snd_emu10k1 *hw;
  75         unsigned long flags;
  76
  77         if (dev->driver_data == NULL)
  78                 return 0; /* not registered actually */
  79
  80         emux = dev->driver_data;
  81
  82         hw = emux->hw;
  83         spin_lock_irqsave(&hw->voice_lock, flags);
  84         hw->synth = NULL;
  85         hw->get_synth_voice = NULL;
  86         spin_unlock_irqrestore(&hw->voice_lock, flags);
  87
  88         snd_emux_free(emux);
  89         return 0;
  90 }
  91
  92 /*
  93  *  INIT part
  94  */
  95
  96 static struct snd_seq_driver emu10k1_synth_driver = {
  97         .driver = {
  98                 .name = KBUILD_MODNAME,
  99                 .probe = snd_emu10k1_synth_probe,
 100                 .remove = snd_emu10k1_synth_remove,
 101         },
 102         .id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
 103         .argsize = sizeof(struct snd_emu10k1_synth_arg),
 104 };
 105
 106 module_snd_seq_driver(emu10k1_synth_driver);