/*
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Routines for control of SoundBlaster cards - MIDI interface
*
* This program is free software; you can redistribute it and/or modify
* Added full duplex UART mode for DSP version 2.0 and later.
*/
-#include <sound/driver.h>
#include <asm/io.h>
#include <linux/time.h>
#include <sound/core.h>
#include <sound/sb.h>
-/*
-
- */
-irqreturn_t snd_sb8dsp_midi_interrupt(struct snd_sb * chip)
+irqreturn_t snd_sb8dsp_midi_interrupt(struct snd_sb *chip)
{
struct snd_rawmidi *rmidi;
int max = 64;
char byte;
- if (chip == NULL || (rmidi = chip->rmidi) == NULL) {
+ if (!chip)
+ return IRQ_NONE;
+
+ rmidi = chip->rmidi;
+ if (!rmidi) {
inb(SBP(chip, DATA_AVAIL)); /* ack interrupt */
return IRQ_NONE;
}
+
spin_lock(&chip->midi_input_lock);
while (max-- > 0) {
if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
return IRQ_HANDLED;
}
-/*
-
- */
-
static int snd_sb8dsp_midi_input_open(struct snd_rawmidi_substream *substream)
{
unsigned long flags;
snd_sb8dsp_midi_output_write(substream);
}
-/*
-
- */
-
static struct snd_rawmidi_ops snd_sb8dsp_midi_output =
{
.open = snd_sb8dsp_midi_output_open,