400 lines
11 KiB
C
400 lines
11 KiB
C
/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Routines for control of EMU10K1 MPU-401 in UART mode
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/time.h>
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#include <linux/init.h>
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#include <sound/core.h>
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#include <sound/emu10k1.h>
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#define EMU10K1_MIDI_MODE_INPUT (1<<0)
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#define EMU10K1_MIDI_MODE_OUTPUT (1<<1)
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static inline unsigned char mpu401_read(struct snd_emu10k1 *emu,
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struct snd_emu10k1_midi *mpu, int idx)
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{
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if (emu->audigy)
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return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
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else
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return inb(emu->port + mpu->port + idx);
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}
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static inline void mpu401_write(struct snd_emu10k1 *emu,
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struct snd_emu10k1_midi *mpu, int data, int idx)
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{
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if (emu->audigy)
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snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
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else
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outb(data, emu->port + mpu->port + idx);
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}
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#define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0)
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#define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1)
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#define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0)
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#define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1)
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#define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80))
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#define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40))
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#define MPU401_RESET 0xff
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#define MPU401_ENTER_UART 0x3f
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#define MPU401_ACK 0xfe
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static void mpu401_clear_rx(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *mpu)
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{
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int timeout = 100000;
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for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
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mpu401_read_data(emu, mpu);
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#ifdef CONFIG_SND_DEBUG
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if (timeout <= 0)
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dev_err(emu->card->dev,
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"cmd: clear rx timeout (status = 0x%x)\n",
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mpu401_read_stat(emu, mpu));
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#endif
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}
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/*
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*/
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static void do_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, unsigned int status)
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{
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unsigned char byte;
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if (midi->rmidi == NULL) {
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snd_emu10k1_intr_disable(emu, midi->tx_enable | midi->rx_enable);
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return;
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}
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spin_lock(&midi->input_lock);
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if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
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if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
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mpu401_clear_rx(emu, midi);
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} else {
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byte = mpu401_read_data(emu, midi);
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if (midi->substream_input)
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snd_rawmidi_receive(midi->substream_input, &byte, 1);
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}
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}
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spin_unlock(&midi->input_lock);
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spin_lock(&midi->output_lock);
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if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
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if (midi->substream_output &&
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snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
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mpu401_write_data(emu, midi, byte);
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} else {
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snd_emu10k1_intr_disable(emu, midi->tx_enable);
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}
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}
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spin_unlock(&midi->output_lock);
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}
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static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
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{
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do_emu10k1_midi_interrupt(emu, &emu->midi, status);
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}
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static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
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{
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do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
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}
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static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
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{
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unsigned long flags;
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int timeout, ok;
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spin_lock_irqsave(&midi->input_lock, flags);
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mpu401_write_data(emu, midi, 0x00);
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/* mpu401_clear_rx(emu, midi); */
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mpu401_write_cmd(emu, midi, cmd);
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if (ack) {
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ok = 0;
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timeout = 10000;
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while (!ok && timeout-- > 0) {
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if (mpu401_input_avail(emu, midi)) {
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if (mpu401_read_data(emu, midi) == MPU401_ACK)
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ok = 1;
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}
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}
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if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
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ok = 1;
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} else {
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ok = 1;
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}
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spin_unlock_irqrestore(&midi->input_lock, flags);
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if (!ok) {
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dev_err(emu->card->dev,
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"midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
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cmd, emu->port,
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mpu401_read_stat(emu, midi),
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mpu401_read_data(emu, midi));
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return 1;
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}
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return 0;
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}
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static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
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{
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struct snd_emu10k1 *emu;
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struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
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unsigned long flags;
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emu = midi->emu;
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if (snd_BUG_ON(!emu))
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return -ENXIO;
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spin_lock_irqsave(&midi->open_lock, flags);
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midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT;
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midi->substream_input = substream;
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if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
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goto error_out;
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if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
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goto error_out;
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} else {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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}
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return 0;
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error_out:
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return -EIO;
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}
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static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream)
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{
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struct snd_emu10k1 *emu;
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struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
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unsigned long flags;
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emu = midi->emu;
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if (snd_BUG_ON(!emu))
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return -ENXIO;
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spin_lock_irqsave(&midi->open_lock, flags);
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midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT;
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midi->substream_output = substream;
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if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
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goto error_out;
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if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
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goto error_out;
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} else {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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}
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return 0;
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error_out:
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return -EIO;
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}
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static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
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{
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struct snd_emu10k1 *emu;
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struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
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unsigned long flags;
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int err = 0;
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emu = midi->emu;
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if (snd_BUG_ON(!emu))
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return -ENXIO;
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spin_lock_irqsave(&midi->open_lock, flags);
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snd_emu10k1_intr_disable(emu, midi->rx_enable);
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midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
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midi->substream_input = NULL;
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if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
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} else {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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}
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return err;
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}
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static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
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{
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struct snd_emu10k1 *emu;
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struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
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unsigned long flags;
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int err = 0;
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emu = midi->emu;
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if (snd_BUG_ON(!emu))
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return -ENXIO;
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spin_lock_irqsave(&midi->open_lock, flags);
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snd_emu10k1_intr_disable(emu, midi->tx_enable);
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midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
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midi->substream_output = NULL;
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if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
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} else {
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spin_unlock_irqrestore(&midi->open_lock, flags);
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}
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return err;
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}
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static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
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{
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struct snd_emu10k1 *emu;
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struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
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emu = midi->emu;
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if (snd_BUG_ON(!emu))
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return;
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if (up)
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snd_emu10k1_intr_enable(emu, midi->rx_enable);
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else
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snd_emu10k1_intr_disable(emu, midi->rx_enable);
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}
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static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
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{
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struct snd_emu10k1 *emu;
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struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
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unsigned long flags;
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emu = midi->emu;
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if (snd_BUG_ON(!emu))
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return;
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if (up) {
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int max = 4;
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unsigned char byte;
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/* try to send some amount of bytes here before interrupts */
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spin_lock_irqsave(&midi->output_lock, flags);
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while (max > 0) {
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if (mpu401_output_ready(emu, midi)) {
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if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) ||
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snd_rawmidi_transmit(substream, &byte, 1) != 1) {
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/* no more data */
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spin_unlock_irqrestore(&midi->output_lock, flags);
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return;
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}
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mpu401_write_data(emu, midi, byte);
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max--;
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} else {
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break;
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}
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}
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spin_unlock_irqrestore(&midi->output_lock, flags);
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snd_emu10k1_intr_enable(emu, midi->tx_enable);
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} else {
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snd_emu10k1_intr_disable(emu, midi->tx_enable);
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}
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}
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/*
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*/
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static struct snd_rawmidi_ops snd_emu10k1_midi_output =
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{
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.open = snd_emu10k1_midi_output_open,
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.close = snd_emu10k1_midi_output_close,
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.trigger = snd_emu10k1_midi_output_trigger,
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};
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static struct snd_rawmidi_ops snd_emu10k1_midi_input =
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{
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.open = snd_emu10k1_midi_input_open,
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.close = snd_emu10k1_midi_input_close,
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.trigger = snd_emu10k1_midi_input_trigger,
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};
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static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
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{
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struct snd_emu10k1_midi *midi = rmidi->private_data;
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midi->interrupt = NULL;
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midi->rmidi = NULL;
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}
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static int emu10k1_midi_init(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, int device, char *name)
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{
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struct snd_rawmidi *rmidi;
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int err;
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if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
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return err;
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midi->emu = emu;
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spin_lock_init(&midi->open_lock);
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spin_lock_init(&midi->input_lock);
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spin_lock_init(&midi->output_lock);
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strcpy(rmidi->name, name);
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
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SNDRV_RAWMIDI_INFO_INPUT |
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SNDRV_RAWMIDI_INFO_DUPLEX;
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rmidi->private_data = midi;
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rmidi->private_free = snd_emu10k1_midi_free;
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midi->rmidi = rmidi;
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return 0;
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}
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int snd_emu10k1_midi(struct snd_emu10k1 *emu)
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{
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struct snd_emu10k1_midi *midi = &emu->midi;
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int err;
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if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
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return err;
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midi->tx_enable = INTE_MIDITXENABLE;
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midi->rx_enable = INTE_MIDIRXENABLE;
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midi->port = MUDATA;
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midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
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midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
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midi->interrupt = snd_emu10k1_midi_interrupt;
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return 0;
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}
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int snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
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{
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struct snd_emu10k1_midi *midi;
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int err;
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midi = &emu->midi;
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if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
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return err;
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midi->tx_enable = INTE_MIDITXENABLE;
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midi->rx_enable = INTE_MIDIRXENABLE;
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midi->port = A_MUDATA1;
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midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
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midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
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midi->interrupt = snd_emu10k1_midi_interrupt;
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midi = &emu->midi2;
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if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
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return err;
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midi->tx_enable = INTE_A_MIDITXENABLE2;
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midi->rx_enable = INTE_A_MIDIRXENABLE2;
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midi->port = A_MUDATA2;
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midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
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midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
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midi->interrupt = snd_emu10k1_midi_interrupt2;
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return 0;
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}
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