static int snd_msnd_playback_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_msnd *chip = snd_pcm_substream_chip(substream);
int result = 0;
if (cmd == SNDRV_PCM_TRIGGER_START) {
snd_printdd("snd_msnd_playback_trigger(START)\n");
chip->banksPlayed = 0;
set_bit(F_WRITING, &chip->flags);
snd_msnd_DAPQ(chip, 1);
} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
snd_printdd("snd_msnd_playback_trigger(STop)\n");
/* interrupt diagnostic, comment this out later */
clear_bit(F_WRITING, &chip->flags);
snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_STOP);
} else {
snd_printd(KERN_ERR "snd_msnd_playback_trigger(?????)\n");
result = -EINVAL;
}
snd_printdd("snd_msnd_playback_trigger() ENDE\n");
return result;
}
static void snd_msnd_eval_dsp_msg(struct snd_msnd *chip, u16 wMessage)
{
switch (HIBYTE(wMessage)) {
case HIMT_PLAY_DONE: {
if (chip->banksPlayed < 3)
snd_printdd("%08X: HIMT_PLAY_DONE: %i\n",
(unsigned)jiffies, LOBYTE(wMessage));
if (chip->last_playbank == LOBYTE(wMessage)) {
snd_printdd("chip.last_playbank == LOBYTE(wMessage)\n");
break;
}
chip->banksPlayed++;
if (test_bit(F_WRITING, &chip->flags))
snd_msnd_DAPQ(chip, 0);
chip->last_playbank = LOBYTE(wMessage);
chip->playDMAPos += chip->play_period_bytes;
if (chip->playDMAPos > chip->playLimit)
chip->playDMAPos = 0;
snd_pcm_period_elapsed(chip->playback_substream);
break;
}
case HIMT_RECORD_DONE:
if (chip->last_recbank == LOBYTE(wMessage))
break;
chip->last_recbank = LOBYTE(wMessage);
chip->captureDMAPos += chip->capturePeriodBytes;
if (chip->captureDMAPos > (chip->captureLimit))
chip->captureDMAPos = 0;
if (test_bit(F_READING, &chip->flags))
snd_msnd_DARQ(chip, chip->last_recbank);
snd_pcm_period_elapsed(chip->capture_substream);
break;
case HIMT_DSP:
switch (LOBYTE(wMessage)) {
#ifndef MSND_CLASSIC
case HIDSP_PLAY_UNDER:
#endif
case HIDSP_INT_PLAY_UNDER:
snd_printd(KERN_WARNING LOGNAME ": Play underflow %i\n",
chip->banksPlayed);
if (chip->banksPlayed > 2)
clear_bit(F_WRITING, &chip->flags);
break;
case HIDSP_INT_RECORD_OVER:
snd_printd(KERN_WARNING LOGNAME ": Record overflow\n");
clear_bit(F_READING, &chip->flags);
break;
default:
snd_printd(KERN_WARNING LOGNAME
": DSP message %d 0x%02x\n",
LOBYTE(wMessage), LOBYTE(wMessage));
break;
}
break;
case HIMT_MIDI_IN_UCHAR:
if (chip->msndmidi_mpu)
snd_msndmidi_input_read(chip->msndmidi_mpu);
break;
default:
snd_printd(KERN_WARNING LOGNAME ": HIMT message %d 0x%02x\n",
HIBYTE(wMessage), HIBYTE(wMessage));
break;
}
}
