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_output_trigger(snd_rawmidi_substream_t * substream, int up)
{
emu10k1_t *emu;
emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
unsigned long flags;
emu = midi->emu;
snd_assert(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 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) {
// snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
// cmd, emu->port,
// mpu401_read_stat(emu, midi),
;
return 1;
}
return 0;
}
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;
/* */
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) {
/* */
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);
}
}
