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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>4 * Routines for control of MPU-401 in UART mode5 *6 * Modified for the Aureal Vortex based Soundcards7 * by Manuel Jander (mjande@embedded.cl).8 */9 10#include <linux/time.h>11#include <linux/init.h>12#include <sound/core.h>13#include <sound/mpu401.h>14#include "au88x0.h"15 16/* Check for mpu401 mmio support. */17/* MPU401 legacy support is only provided as a emergency fallback *18 * for older versions of ALSA. Its usage is strongly discouraged. */19#ifndef MPU401_HW_AUREAL20#define VORTEX_MPU401_LEGACY21#endif22 23/* Vortex MPU401 defines. */24#define MIDI_CLOCK_DIV 0x6125/* Standart MPU401 defines. */26#define MPU401_RESET 0xff27#define MPU401_ENTER_UART 0x3f28#define MPU401_ACK 0xfe29 30static int snd_vortex_midi(vortex_t *vortex)31{32 struct snd_rawmidi *rmidi;33 int temp, mode;34 struct snd_mpu401 *mpu;35 unsigned long port;36 37#ifdef VORTEX_MPU401_LEGACY38 /* EnableHardCodedMPU401Port() */39 /* Enable Legacy MIDI Interface port. */40 port = (0x03 << 5); /* FIXME: static address. 0x330 */41 temp =42 (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) |43 CTRL_MIDI_EN | port;44 hwwrite(vortex->mmio, VORTEX_CTRL, temp);45#else46 /* Disable Legacy MIDI Interface port. */47 temp =48 (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) &49 ~CTRL_MIDI_EN;50 hwwrite(vortex->mmio, VORTEX_CTRL, temp);51#endif52 /* Mpu401UartInit() */53 mode = 1;54 temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf;55 temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4;56 hwwrite(vortex->mmio, VORTEX_CTRL2, temp);57 hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET);58 59 /* Check if anything is OK. */60 temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);61 if (temp != MPU401_ACK /*0xfe */ ) {62 dev_err(vortex->card->dev, "midi port doesn't acknowledge!\n");63 return -ENODEV;64 }65 /* Enable MPU401 interrupts. */66 hwwrite(vortex->mmio, VORTEX_IRQ_CTRL,67 hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI);68 69 /* Create MPU401 instance. */70#ifdef VORTEX_MPU401_LEGACY71 temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330,72 MPU401_INFO_IRQ_HOOK, -1, &rmidi);73 if (temp) {74 hwwrite(vortex->mmio, VORTEX_CTRL,75 (hwread(vortex->mmio, VORTEX_CTRL) &76 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);77 return temp;78 }79#else80 port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA);81 temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port,82 MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO |83 MPU401_INFO_IRQ_HOOK, -1, &rmidi);84 if (temp) {85 hwwrite(vortex->mmio, VORTEX_CTRL,86 (hwread(vortex->mmio, VORTEX_CTRL) &87 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);88 return temp;89 }90 mpu = rmidi->private_data;91 mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD);92#endif93 /* Overwrite MIDI name */94 snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number);95 96 vortex->rmidi = rmidi;97 return 0;98}99