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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Routines for control of MPU-401 in UART mode
*
* Modified for the Aureal Vortex based Soundcards
* by Manuel Jander (mjande@embedded.cl).
*/
#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 0x61
/* Standart MPU401 defines. */
#define MPU401_RESET 0xff
#define MPU401_ENTER_UART 0x3f
#define MPU401_ACK 0xfe
static int snd_vortex_midi(vortex_t *vortex)
{
struct snd_rawmidi *rmidi;
int temp, mode;
struct snd_mpu401 *mpu;
unsigned long port;
#ifdef VORTEX_MPU401_LEGACY
/* EnableHardCodedMPU401Port() */
/* Enable Legacy MIDI Interface port. */
port = (0x03 << 5); /* FIXME: static address. 0x330 */
temp =
(hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) |
CTRL_MIDI_EN | port;
hwwrite(vortex->mmio, VORTEX_CTRL, temp);
#else
/* Disable Legacy MIDI Interface port. */
temp =
(hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) &
~CTRL_MIDI_EN;
hwwrite(vortex->mmio, VORTEX_CTRL, temp);
#endif
/* Mpu401UartInit() */
mode = 1;
temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf;
temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4;
hwwrite(vortex->mmio, VORTEX_CTRL2, temp);
hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET);
/* Check if anything is OK. */
temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);
if (temp != MPU401_ACK /*0xfe */ ) {
dev_err(vortex->card->dev, "midi port doesn't acknowledge!\n");
return -ENODEV;
}
/* Enable MPU401 interrupts. */
hwwrite(vortex->mmio, VORTEX_IRQ_CTRL,
hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI);
/* Create MPU401 instance. */
#ifdef VORTEX_MPU401_LEGACY
if ((temp =
snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330,
MPU401_INFO_IRQ_HOOK, -1, &rmidi)) != 0) {
hwwrite(vortex->mmio, VORTEX_CTRL,
(hwread(vortex->mmio, VORTEX_CTRL) &
~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
return temp;
}
#else
port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA);
if ((temp =
snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port,
MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO |
MPU401_INFO_IRQ_HOOK, -1, &rmidi)) != 0) {
hwwrite(vortex->mmio, VORTEX_CTRL,
(hwread(vortex->mmio, VORTEX_CTRL) &
~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
return temp;
}
mpu = rmidi->private_data;
mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD);
#endif
/* Overwrite MIDI name */
snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number);
vortex->rmidi = rmidi;
return 0;
}
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