LXR linux/sound/isa/sb/emu8000

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4 *     and (c) 1999 Steve Ratcliffe <steve@parabola.demon.co.uk>
   5 *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
   6 *
   7 *  Emu8000 synth plug-in routine
   8 */
   9
  10#include "emu8000_local.h"
  11#include <linux/init.h>
  12#include <linux/module.h>
  13#include <sound/initval.h>
  14
  15MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
  16MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
  17MODULE_LICENSE("GPL");
  18
  19/*----------------------------------------------------------------*/
  20
  21/*
  22 * create a new hardware dependent device for Emu8000
  23 */
  24static int snd_emu8000_probe(struct device *_dev)
  25{
  26        struct snd_seq_device *dev = to_seq_dev(_dev);
  27        struct snd_emu8000 *hw;
  28        struct snd_emux *emu;
  29
  30        hw = *(struct snd_emu8000**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
  31        if (hw == NULL)
  32                return -EINVAL;
  33
  34        if (hw->emu)
  35                return -EBUSY; /* already exists..? */
  36
  37        if (snd_emux_new(&emu) < 0)
  38                return -ENOMEM;
  39
  40        hw->emu = emu;
  41        snd_emu8000_ops_setup(hw);
  42
  43        emu->hw = hw;
  44        emu->max_voices = EMU8000_DRAM_VOICES;
  45        emu->num_ports = hw->seq_ports;
  46
  47        if (hw->memhdr) {
  48                snd_printk(KERN_ERR "memhdr is already initialized!?\n");
  49                snd_util_memhdr_free(hw->memhdr);
  50        }
  51        hw->memhdr = snd_util_memhdr_new(hw->mem_size);
  52        if (hw->memhdr == NULL) {
  53                snd_emux_free(emu);
  54                hw->emu = NULL;
  55                return -ENOMEM;
  56        }
  57
  58        emu->memhdr = hw->memhdr;
  59        emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
  60        emu->midi_devidx = 1;
  61        emu->linear_panning = 1;
  62        emu->hwdep_idx = 2; /* FIXED */
  63
  64        if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
  65                snd_emux_free(emu);
  66                snd_util_memhdr_free(hw->memhdr);
  67                hw->emu = NULL;
  68                hw->memhdr = NULL;
  69                return -ENOMEM;
  70        }
  71
  72        if (hw->mem_size > 0)
  73                snd_emu8000_pcm_new(dev->card, hw, 1);
  74
  75        dev->driver_data = hw;
  76
  77        return 0;
  78}
  79
  80
  81/*
  82 * free all resources
  83 */
  84static int snd_emu8000_remove(struct device *_dev)
  85{
  86        struct snd_seq_device *dev = to_seq_dev(_dev);
  87        struct snd_emu8000 *hw;
  88
  89        if (dev->driver_data == NULL)
  90                return 0; /* no synth was allocated actually */
  91
  92        hw = dev->driver_data;
  93        if (hw->pcm)
  94                snd_device_free(dev->card, hw->pcm);
  95        snd_emux_free(hw->emu);
  96        snd_util_memhdr_free(hw->memhdr);
  97        hw->emu = NULL;
  98        hw->memhdr = NULL;
  99        return 0;
 100}
 101
 102/*
 103 *  INIT part
 104 */
 105
 106static struct snd_seq_driver emu8000_driver = {
 107        .driver = {
 108                .name = KBUILD_MODNAME,
 109                .probe = snd_emu8000_probe,
 110                .remove = snd_emu8000_remove,
 111        },
 112        .id = SNDRV_SEQ_DEV_ID_EMU8000,
 113        .argsize = sizeof(struct snd_emu8000 *),
 114};
 115
 116module_snd_seq_driver(emu8000_driver);
 117