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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emu10k1_synth.c (2469B)

      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
     12MODULE_AUTHOR("Takashi Iwai");
     13MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
     14MODULE_LICENSE("GPL");
     15
     16/*
     17 * create a new hardware dependent device for Emu10k1
     18 */
     19static 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
     70static 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
     96static 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
    106module_snd_seq_driver(emu10k1_synth_driver);