static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id)
{
uint32_t port_intr;
int underflow_occured = 0;
struct snd_ps3_card_info *card = dev_id;
if (!card->running) {
update_reg(PS3_AUDIO_AX_IS, 0);
update_reg(PS3_AUDIO_INTR_0, 0);
return IRQ_HANDLED;
}
port_intr = read_reg(PS3_AUDIO_AX_IS);
if (port_intr & PS3_AUDIO_AX_IE_ASOBEIE(0)) {
write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBEIE(0));
if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
write_reg(PS3_AUDIO_AX_IS, port_intr);
underflow_occured = 1;
}
if (card->silent) {
snd_ps3_program_dma(card,
(underflow_occured) ?
SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL :
SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
snd_ps3_kick_dma(card);
card->silent--;
} else {
snd_ps3_program_dma(card,
(underflow_occured) ?
SND_PS3_DMA_FILLTYPE_FIRSTFILL :
SND_PS3_DMA_FILLTYPE_RUNNING);
snd_ps3_kick_dma(card);
snd_pcm_period_elapsed(card->substream);
}
} else if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBUIE(0));
snd_ps3_program_dma(card,
SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
snd_ps3_kick_dma(card);
snd_ps3_program_dma(card,
SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
snd_ps3_kick_dma(card);
}
return IRQ_HANDLED;
};
static int snd_ps3_pcm_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
/* clear outstanding interrupts */
update_reg(PS3_AUDIO_AX_IS, 0);
spin_lock(&card->dma_lock);
{
card->running = 1;
}
spin_unlock(&card->dma_lock);
snd_ps3_program_dma(card,
SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
snd_ps3_kick_dma(card);
while (read_reg(PS3_AUDIO_KICK(7)) &
PS3_AUDIO_KICK_STATUS_MASK) {
udelay(1);
}
snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
snd_ps3_kick_dma(card);
break;
case SNDRV_PCM_TRIGGER_STOP:
spin_lock(&card->dma_lock);
{
card->running = 0;
}
spin_unlock(&card->dma_lock);
snd_ps3_wait_for_dma_stop(card);
break;
default:
break;
}
return ret;
};
static int snd_ps3_init_avsetting(struct snd_ps3_card_info *card)
{
int ret;
pr_debug("%s: start\n", __func__);
card->avs.avs_audio_ch = PS3AV_CMD_AUDIO_NUM_OF_CH_2;
card->avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
card->avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
card->avs.avs_audio_format = PS3AV_CMD_AUDIO_FORMAT_PCM;
card->avs.avs_audio_source = PS3AV_CMD_AUDIO_SOURCE_SERIAL;
ret = snd_ps3_change_avsetting(card);
snd_ps3_audio_fixup(card);
/* to start to generate SPDIF signal, fill data */
snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
snd_ps3_kick_dma(card);
pr_debug("%s: end\n", __func__);
return ret;
}
/*
* Interrupt handler
*/
static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id)
{
uint32_t port_intr;
int underflow_occured = 0;
struct snd_ps3_card_info *card = dev_id;
if (!card->running) {
update_reg(PS3_AUDIO_AX_IS, 0);
update_reg(PS3_AUDIO_INTR_0, 0);
return IRQ_HANDLED;
}
port_intr = read_reg(PS3_AUDIO_AX_IS);
/*
*serial buffer empty detected (every 4 times),
*program next dma and kick it
*/
if (port_intr & PS3_AUDIO_AX_IE_ASOBEIE(0)) {
write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBEIE(0));
if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
write_reg(PS3_AUDIO_AX_IS, port_intr);
underflow_occured = 1;
}
if (card->silent) {
/* we are still in silent time */
snd_ps3_program_dma(card,
(underflow_occured) ?
SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL :
SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
snd_ps3_kick_dma(card);
card->silent--;
} else {
snd_ps3_program_dma(card,
(underflow_occured) ?
SND_PS3_DMA_FILLTYPE_FIRSTFILL :
SND_PS3_DMA_FILLTYPE_RUNNING);
snd_ps3_kick_dma(card);
snd_pcm_period_elapsed(card->substream);
}
} else if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBUIE(0));
/*
* serial out underflow, but buffer empty not detected.
* in this case, fill fifo with 0 to recover. After
* filling dummy data, serial automatically start to
* consume them and then will generate normal buffer
* empty interrupts.
* If both buffer underflow and buffer empty are occurred,
* it is better to do nomal data transfer than empty one
*/
snd_ps3_program_dma(card,
SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
snd_ps3_kick_dma(card);
snd_ps3_program_dma(card,
SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
snd_ps3_kick_dma(card);
}
/* clear interrupt cause */
return IRQ_HANDLED;
};