linux/sound/pci/au88x0/au88x0_mpu401.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 *  Routines for control of MPU-401 in UART mode
 *
 *   Modified for the Aureal Vortex based Soundcards
 *   by Manuel Jander ([email protected]).
 */

#include <linux/time.h>
#include <linux/init.h>
#include <sound/core.h>
#include <sound/mpu401.h>
#include "au88x0.h"

/* Check for mpu401 mmio support. */
/* MPU401 legacy support is only provided as a emergency fallback *
 * for older versions of ALSA. Its usage is strongly discouraged. */
#ifndef MPU401_HW_AUREAL
#define VORTEX_MPU401_LEGACY
#endif

/* Vortex MPU401 defines. */
#define MIDI_CLOCK_DIV …
/* Standart MPU401 defines. */
#define MPU401_RESET …
#define MPU401_ENTER_UART …
#define MPU401_ACK …

static int snd_vortex_midi(vortex_t *vortex)
{ … }