irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
{
struct mixart_mgr *mgr = dev_id;
u32 it_reg;
it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
if( !(it_reg & MIXART_OIDI) ) {
/* this device did not cause the interrupt */
return IRQ_NONE;
}
/* mask all interrupts */
writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
/* outdoorbell register clear */
it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
/* clear interrupt */
writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
return IRQ_WAKE_THREAD;
}
irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
{
struct mixart_mgr *mgr = dev_id;
int err;
struct mixart_msg resp;
u32 msg;
u32 it_reg;
spin_lock(&mgr->lock);
it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
if( !(it_reg & MIXART_OIDI) ) {
/* this device did not cause the interrupt */
spin_unlock(&mgr->lock);
return IRQ_NONE;
}
/* mask all interrupts */
writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
/* outdoorbell register clear */
it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
/* clear interrupt */
writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
/* process interrupt */
while (retrieve_msg_frame(mgr, &msg)) {
switch (msg & MSG_TYPE_MASK) {
case MSG_TYPE_COMMAND:
resp.message_id = 0;
resp.data = mixart_msg_data;
resp.size = sizeof(mixart_msg_data);
err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
if( err < 0 ) {
dev_err(&mgr->pci->dev,
"interrupt: error(%d) reading mf %x\n",
err, msg);
break;
}
if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
int i;
struct mixart_timer_notify *notify;
notify = (struct mixart_timer_notify *)mixart_msg_data;
for(i=0; i<notify->stream_count; i++) {
u32 buffer_id = notify->streams[i].buffer_id;
unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */
unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */
unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */
struct snd_mixart *chip = mgr->chip[chip_number];
struct mixart_stream *stream;
if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) {
dev_err(&mgr->pci->dev,
"error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
buffer_id, notify->streams[i].sample_pos_low_part);
break;
}
if (is_capture)
stream = &chip->capture_stream[pcm_number];
else
stream = &chip->playback_stream[pcm_number][sub_number];
if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) {
struct snd_pcm_runtime *runtime = stream->substream->runtime;
int elapsed = 0;
u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32;
sample_count |= notify->streams[i].sample_pos_low_part;
while (1) {
u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size;
if (new_elapse_pos > sample_count) {
break; /* while */
}
else {
elapsed = 1;
stream->buf_periods++;
if (stream->buf_periods >= runtime->periods)
stream->buf_periods = 0;
stream->abs_period_elapsed = new_elapse_pos;
}
}
stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );
if(elapsed) {
spin_unlock(&mgr->lock);
snd_pcm_period_elapsed(stream->substream);
spin_lock(&mgr->lock);
}
}
}
break;
}
if(resp.message_id == MSG_SERVICES_REPORT_TRACES) {
if(resp.size > 1) {
#ifndef __BIG_ENDIAN
/* Traces are text: the swapped msg_data has to be swapped back ! */
int i;
for(i=0; i<(resp.size/4); i++) {
(mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]);
}
#endif
((char*)mixart_msg_data)[resp.size - 1] = 0;
dev_dbg(&mgr->pci->dev,
"MIXART TRACE : %s\n",
(char *)mixart_msg_data);
}
break;
}
dev_dbg(&mgr->pci->dev, "command %x not handled\n",
resp.message_id);
break;
case MSG_TYPE_NOTIFY:
if(msg & MSG_CANCEL_NOTIFY_MASK) {
msg &= ~MSG_CANCEL_NOTIFY_MASK;
dev_err(&mgr->pci->dev,
"canceled notification %x !\n", msg);
}
/* no break, continue ! */
case MSG_TYPE_ANSWER:
/* answer or notification to a message we are waiting for*/
spin_lock(&mgr->msg_lock);
if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
wake_up(&mgr->msg_sleep);
mgr->pending_event = 0;
}
/* answer to a message we did't want to wait for */
else {
mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
mgr->msg_fifo_writeptr++;
mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
tasklet_schedule(&mgr->msg_taskq);
}
spin_unlock(&mgr->msg_lock);
break;
case MSG_TYPE_REQUEST:
default:
dev_dbg(&mgr->pci->dev,
"interrupt received request %x\n", msg);
/* TODO : are there things to do here ? */
break;
} /* switch on msg type */
} /* while there are msgs */
