sound/synth/emux/emux.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 EMU WaveTable chip
   6  */
   7
   8 #include <linux/wait.h>
   9 #include <linux/slab.h>
  10 #include <linux/string.h>
  11 #include <sound/core.h>
  12 #include <sound/emux_synth.h>
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include "emux_voice.h"
  16
  17 MODULE_AUTHOR("Takashi Iwai");
  18 MODULE_DESCRIPTION("Routines for control of EMU WaveTable chip");
  19 MODULE_LICENSE("GPL");
  20
  21 /*
  22  * create a new hardware dependent device for Emu8000/Emu10k1
  23  */
  24 int snd_emux_new(struct snd_emux **remu)
  25 {
  26         struct snd_emux *emu;
  27
  28         *remu = NULL;
  29         emu = kzalloc(sizeof(*emu), GFP_KERNEL);
  30         if (emu == NULL)
  31                 return -ENOMEM;
  32
  33         spin_lock_init(&emu->voice_lock);
  34         mutex_init(&emu->register_mutex);
  35
  36         emu->client = -1;
  37 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
  38         emu->oss_synth = NULL;
  39 #endif
  40         emu->max_voices = 0;
  41         emu->use_time = 0;
  42
  43         timer_setup(&emu->tlist, snd_emux_timer_callback, 0);
  44         emu->timer_active = 0;
  45
  46         *remu = emu;
  47         return 0;
  48 }
  49
  50 EXPORT_SYMBOL(snd_emux_new);
  51
  52 /*
  53  */
  54 static int sf_sample_new(void *private_data, struct snd_sf_sample *sp,
  55                                   struct snd_util_memhdr *hdr,
  56                                   const void __user *buf, long count)
  57 {
  58         struct snd_emux *emu = private_data;
  59         return emu->ops.sample_new(emu, sp, hdr, buf, count);
  60
  61 }
  62
  63 static int sf_sample_free(void *private_data, struct snd_sf_sample *sp,
  64                                    struct snd_util_memhdr *hdr)
  65 {
  66         struct snd_emux *emu = private_data;
  67         return emu->ops.sample_free(emu, sp, hdr);
  68
  69 }
  70
  71 static void sf_sample_reset(void *private_data)
  72 {
  73         struct snd_emux *emu = private_data;
  74         emu->ops.sample_reset(emu);
  75 }
  76
  77 int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, char *name)
  78 {
  79         int err;
  80         struct snd_sf_callback sf_cb;
  81
  82         if (snd_BUG_ON(!emu->hw || emu->max_voices <= 0))
  83                 return -EINVAL;
  84         if (snd_BUG_ON(!card || !name))
  85                 return -EINVAL;
  86
  87         emu->card = card;
  88         emu->name = kstrdup(name, GFP_KERNEL);
  89         emu->voices = kcalloc(emu->max_voices, sizeof(struct snd_emux_voice),
  90                               GFP_KERNEL);
  91         if (emu->voices == NULL)
  92                 return -ENOMEM;
  93
  94         /* create soundfont list */
  95         memset(&sf_cb, 0, sizeof(sf_cb));
  96         sf_cb.private_data = emu;
  97         if (emu->ops.sample_new)
  98                 sf_cb.sample_new = sf_sample_new;
  99         if (emu->ops.sample_free)
 100                 sf_cb.sample_free = sf_sample_free;
 101         if (emu->ops.sample_reset)
 102                 sf_cb.sample_reset = sf_sample_reset;
 103         emu->sflist = snd_sf_new(&sf_cb, emu->memhdr);
 104         if (emu->sflist == NULL)
 105                 return -ENOMEM;
 106
 107         if ((err = snd_emux_init_hwdep(emu)) < 0)
 108                 return err;
 109
 110         snd_emux_init_voices(emu);
 111
 112         snd_emux_init_seq(emu, card, index);
 113 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
 114         snd_emux_init_seq_oss(emu);
 115 #endif
 116         snd_emux_init_virmidi(emu, card);
 117
 118         snd_emux_proc_init(emu, card, index);
 119         return 0;
 120 }
 121
 122 EXPORT_SYMBOL(snd_emux_register);
 123
 124 /*
 125  */
 126 int snd_emux_free(struct snd_emux *emu)
 127 {
 128         unsigned long flags;
 129
 130         if (! emu)
 131                 return -EINVAL;
 132
 133         spin_lock_irqsave(&emu->voice_lock, flags);
 134         if (emu->timer_active)
 135                 del_timer(&emu->tlist);
 136         spin_unlock_irqrestore(&emu->voice_lock, flags);
 137
 138         snd_emux_proc_free(emu);
 139         snd_emux_delete_virmidi(emu);
 140 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
 141         snd_emux_detach_seq_oss(emu);
 142 #endif
 143         snd_emux_detach_seq(emu);
 144         snd_emux_delete_hwdep(emu);
 145         snd_sf_free(emu->sflist);
 146         kfree(emu->voices);
 147         kfree(emu->name);
 148         kfree(emu);
 149         return 0;
 150 }
 151
 152 EXPORT_SYMBOL(snd_emux_free);