root/sound/isa/sb/emu8000_synth.c

DEFINITIONS

1. snd_emu8000_probe
2. snd_emu8000_remove

   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 
  15 MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
  16 MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
  17 MODULE_LICENSE("GPL");
  18 
  19 /*----------------------------------------------------------------*/
  20 
  21 /*
  22  * create a new hardware dependent device for Emu8000
  23  */
  24 static 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  */
  84 static 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 
 106 static 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 
 116 module_snd_seq_driver(emu8000_driver);