400 lines
11 KiB
C
400 lines
11 KiB
C
|
/*
|
||
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
||
|
|
* Routines for control of EMU10K1 MPU-401 in UART mode
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* 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 <linux/time.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <sound/core.h>
|
||
|
|
#include <sound/emu10k1.h>
|
||
|
|
|
||
|
|
#define EMU10K1_MIDI_MODE_INPUT (1<<0)
|
||
|
|
#define EMU10K1_MIDI_MODE_OUTPUT (1<<1)
|
||
|
|
|
||
|
|
static inline unsigned char mpu401_read(struct snd_emu10k1 *emu,
|
||
|
|
struct snd_emu10k1_midi *mpu, int idx)
|
||
|
|
{
|
||
|
|
if (emu->audigy)
|
||
|
|
return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
|
||
|
|
else
|
||
|
|
return inb(emu->port + mpu->port + idx);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void mpu401_write(struct snd_emu10k1 *emu,
|
||
|
|
struct snd_emu10k1_midi *mpu, int data, int idx)
|
||
|
|
{
|
||
|
|
if (emu->audigy)
|
||
|
|
snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
|
||
|
|
else
|
||
|
|
outb(data, emu->port + mpu->port + idx);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0)
|
||
|
|
#define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1)
|
||
|
|
#define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0)
|
||
|
|
#define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1)
|
||
|
|
|
||
|
|
#define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80))
|
||
|
|
#define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40))
|
||
|
|
|
||
|
|
#define MPU401_RESET 0xff
|
||
|
|
#define MPU401_ENTER_UART 0x3f
|
||
|
|
#define MPU401_ACK 0xfe
|
||
|
|
|
||
|
|
static void mpu401_clear_rx(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *mpu)
|
||
|
|
{
|
||
|
|
int timeout = 100000;
|
||
|
|
for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
|
||
|
|
mpu401_read_data(emu, mpu);
|
||
|
|
#ifdef CONFIG_SND_DEBUG
|
||
|
|
if (timeout <= 0)
|
||
|
|
dev_err(emu->card->dev,
|
||
|
|
"cmd: clear rx timeout (status = 0x%x)\n",
|
||
|
|
mpu401_read_stat(emu, mpu));
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
static void do_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, unsigned int status)
|
||
|
|
{
|
||
|
|
unsigned char byte;
|
||
|
|
|
||
|
|
if (midi->rmidi == NULL) {
|
||
|
|
snd_emu10k1_intr_disable(emu, midi->tx_enable | midi->rx_enable);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_lock(&midi->input_lock);
|
||
|
|
if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
|
||
|
|
if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
|
||
|
|
mpu401_clear_rx(emu, midi);
|
||
|
|
} else {
|
||
|
|
byte = mpu401_read_data(emu, midi);
|
||
|
|
if (midi->substream_input)
|
||
|
|
snd_rawmidi_receive(midi->substream_input, &byte, 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock(&midi->input_lock);
|
||
|
|
|
||
|
|
spin_lock(&midi->output_lock);
|
||
|
|
if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
|
||
|
|
if (midi->substream_output &&
|
||
|
|
snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
|
||
|
|
mpu401_write_data(emu, midi, byte);
|
||
|
|
} else {
|
||
|
|
snd_emu10k1_intr_disable(emu, midi->tx_enable);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock(&midi->output_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
|
||
|
|
{
|
||
|
|
do_emu10k1_midi_interrupt(emu, &emu->midi, status);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
|
||
|
|
{
|
||
|
|
do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
int timeout, ok;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&midi->input_lock, flags);
|
||
|
|
mpu401_write_data(emu, midi, 0x00);
|
||
|
|
/* mpu401_clear_rx(emu, midi); */
|
||
|
|
|
||
|
|
mpu401_write_cmd(emu, midi, cmd);
|
||
|
|
if (ack) {
|
||
|
|
ok = 0;
|
||
|
|
timeout = 10000;
|
||
|
|
while (!ok && timeout-- > 0) {
|
||
|
|
if (mpu401_input_avail(emu, midi)) {
|
||
|
|
if (mpu401_read_data(emu, midi) == MPU401_ACK)
|
||
|
|
ok = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
|
||
|
|
ok = 1;
|
||
|
|
} else {
|
||
|
|
ok = 1;
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&midi->input_lock, flags);
|
||
|
|
if (!ok) {
|
||
|
|
dev_err(emu->card->dev,
|
||
|
|
"midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
|
||
|
|
cmd, emu->port,
|
||
|
|
mpu401_read_stat(emu, midi),
|
||
|
|
mpu401_read_data(emu, midi));
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1 *emu;
|
||
|
|
struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
emu = midi->emu;
|
||
|
|
if (snd_BUG_ON(!emu))
|
||
|
|
return -ENXIO;
|
||
|
|
spin_lock_irqsave(&midi->open_lock, flags);
|
||
|
|
midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT;
|
||
|
|
midi->substream_input = substream;
|
||
|
|
if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
|
||
|
|
goto error_out;
|
||
|
|
if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
|
||
|
|
goto error_out;
|
||
|
|
} else {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
error_out:
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1 *emu;
|
||
|
|
struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
emu = midi->emu;
|
||
|
|
if (snd_BUG_ON(!emu))
|
||
|
|
return -ENXIO;
|
||
|
|
spin_lock_irqsave(&midi->open_lock, flags);
|
||
|
|
midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT;
|
||
|
|
midi->substream_output = substream;
|
||
|
|
if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
|
||
|
|
goto error_out;
|
||
|
|
if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
|
||
|
|
goto error_out;
|
||
|
|
} else {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
error_out:
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1 *emu;
|
||
|
|
struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
|
||
|
|
unsigned long flags;
|
||
|
|
int err = 0;
|
||
|
|
|
||
|
|
emu = midi->emu;
|
||
|
|
if (snd_BUG_ON(!emu))
|
||
|
|
return -ENXIO;
|
||
|
|
spin_lock_irqsave(&midi->open_lock, flags);
|
||
|
|
snd_emu10k1_intr_disable(emu, midi->rx_enable);
|
||
|
|
midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
|
||
|
|
midi->substream_input = NULL;
|
||
|
|
if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
|
||
|
|
} else {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
}
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1 *emu;
|
||
|
|
struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
|
||
|
|
unsigned long flags;
|
||
|
|
int err = 0;
|
||
|
|
|
||
|
|
emu = midi->emu;
|
||
|
|
if (snd_BUG_ON(!emu))
|
||
|
|
return -ENXIO;
|
||
|
|
spin_lock_irqsave(&midi->open_lock, flags);
|
||
|
|
snd_emu10k1_intr_disable(emu, midi->tx_enable);
|
||
|
|
midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
|
||
|
|
midi->substream_output = NULL;
|
||
|
|
if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
|
||
|
|
} else {
|
||
|
|
spin_unlock_irqrestore(&midi->open_lock, flags);
|
||
|
|
}
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1 *emu;
|
||
|
|
struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
|
||
|
|
emu = midi->emu;
|
||
|
|
if (snd_BUG_ON(!emu))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (up)
|
||
|
|
snd_emu10k1_intr_enable(emu, midi->rx_enable);
|
||
|
|
else
|
||
|
|
snd_emu10k1_intr_disable(emu, midi->rx_enable);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1 *emu;
|
||
|
|
struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
emu = midi->emu;
|
||
|
|
if (snd_BUG_ON(!emu))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (up) {
|
||
|
|
int max = 4;
|
||
|
|
unsigned char byte;
|
||
|
|
|
||
|
|
/* try to send some amount of bytes here before interrupts */
|
||
|
|
spin_lock_irqsave(&midi->output_lock, flags);
|
||
|
|
while (max > 0) {
|
||
|
|
if (mpu401_output_ready(emu, midi)) {
|
||
|
|
if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) ||
|
||
|
|
snd_rawmidi_transmit(substream, &byte, 1) != 1) {
|
||
|
|
/* no more data */
|
||
|
|
spin_unlock_irqrestore(&midi->output_lock, flags);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
mpu401_write_data(emu, midi, byte);
|
||
|
|
max--;
|
||
|
|
} else {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&midi->output_lock, flags);
|
||
|
|
snd_emu10k1_intr_enable(emu, midi->tx_enable);
|
||
|
|
} else {
|
||
|
|
snd_emu10k1_intr_disable(emu, midi->tx_enable);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
static struct snd_rawmidi_ops snd_emu10k1_midi_output =
|
||
|
|
{
|
||
|
|
.open = snd_emu10k1_midi_output_open,
|
||
|
|
.close = snd_emu10k1_midi_output_close,
|
||
|
|
.trigger = snd_emu10k1_midi_output_trigger,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct snd_rawmidi_ops snd_emu10k1_midi_input =
|
||
|
|
{
|
||
|
|
.open = snd_emu10k1_midi_input_open,
|
||
|
|
.close = snd_emu10k1_midi_input_close,
|
||
|
|
.trigger = snd_emu10k1_midi_input_trigger,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1_midi *midi = rmidi->private_data;
|
||
|
|
midi->interrupt = NULL;
|
||
|
|
midi->rmidi = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int emu10k1_midi_init(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, int device, char *name)
|
||
|
|
{
|
||
|
|
struct snd_rawmidi *rmidi;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
|
||
|
|
return err;
|
||
|
|
midi->emu = emu;
|
||
|
|
spin_lock_init(&midi->open_lock);
|
||
|
|
spin_lock_init(&midi->input_lock);
|
||
|
|
spin_lock_init(&midi->output_lock);
|
||
|
|
strcpy(rmidi->name, name);
|
||
|
|
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
|
||
|
|
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
|
||
|
|
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
|
||
|
|
SNDRV_RAWMIDI_INFO_INPUT |
|
||
|
|
SNDRV_RAWMIDI_INFO_DUPLEX;
|
||
|
|
rmidi->private_data = midi;
|
||
|
|
rmidi->private_free = snd_emu10k1_midi_free;
|
||
|
|
midi->rmidi = rmidi;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int snd_emu10k1_midi(struct snd_emu10k1 *emu)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1_midi *midi = &emu->midi;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
midi->tx_enable = INTE_MIDITXENABLE;
|
||
|
|
midi->rx_enable = INTE_MIDIRXENABLE;
|
||
|
|
midi->port = MUDATA;
|
||
|
|
midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
|
||
|
|
midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
|
||
|
|
midi->interrupt = snd_emu10k1_midi_interrupt;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
|
||
|
|
{
|
||
|
|
struct snd_emu10k1_midi *midi;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
midi = &emu->midi;
|
||
|
|
if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
midi->tx_enable = INTE_MIDITXENABLE;
|
||
|
|
midi->rx_enable = INTE_MIDIRXENABLE;
|
||
|
|
midi->port = A_MUDATA1;
|
||
|
|
midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
|
||
|
|
midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
|
||
|
|
midi->interrupt = snd_emu10k1_midi_interrupt;
|
||
|
|
|
||
|
|
midi = &emu->midi2;
|
||
|
|
if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
midi->tx_enable = INTE_A_MIDITXENABLE2;
|
||
|
|
midi->rx_enable = INTE_A_MIDIRXENABLE2;
|
||
|
|
midi->port = A_MUDATA2;
|
||
|
|
midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
|
||
|
|
midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
|
||
|
|
midi->interrupt = snd_emu10k1_midi_interrupt2;
|
||
|
|
return 0;
|
||
|
|
}
|