cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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emu8000_synth.c (2574B)

      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);