113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/*
|
|
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
|
|
* Routines for control of MPU-401 in UART mode
|
|
*
|
|
* Modified for the Aureal Vortex based Soundcards
|
|
* by Manuel Jander (mjande@embedded.cl).
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <sound/driver.h>
|
|
#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 __devinit snd_vortex_midi(vortex_t * vortex)
|
|
{
|
|
snd_rawmidi_t *rmidi;
|
|
int temp, mode;
|
|
mpu401_t *mpu;
|
|
int 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);
|
|
/* Set some kind of mode */
|
|
if (mode)
|
|
hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_ENTER_UART);
|
|
|
|
/* Check if anything is OK. */
|
|
temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);
|
|
if (temp != MPU401_ACK /*0xfe */ ) {
|
|
printk(KERN_ERR "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,
|
|
0, 0, 0, &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 >> 2));
|
|
if ((temp =
|
|
snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port,
|
|
1, 0, 0, &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 >> 2));
|
|
#endif
|
|
vortex->rmidi = rmidi;
|
|
return 0;
|
|
}
|