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_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
unsigned long irqsave;
if (!snd_ps3_set_avsetting(substream)) {
/* some parameter changed */
write_reg(PS3_AUDIO_AX_IE,
PS3_AUDIO_AX_IE_ASOBEIE(0) |
PS3_AUDIO_AX_IE_ASOBUIE(0));
/*
* let SPDIF device re-lock with SPDIF signal,
* start with some silence
*/
card->silent = snd_ps3_delay_to_bytes(substream,
card->start_delay) /
(PS3_AUDIO_FIFO_STAGE_SIZE * 4); /* every 4 times */
}
/* restart ring buffer pointer */
spin_lock_irqsave(&card->dma_lock, irqsave);
{
card->dma_buffer_size = runtime->dma_bytes;
card->dma_last_transfer_vaddr[SND_PS3_CH_L] =
card->dma_next_transfer_vaddr[SND_PS3_CH_L] =
card->dma_start_vaddr[SND_PS3_CH_L] =
runtime->dma_area;
card->dma_start_bus_addr[SND_PS3_CH_L] = runtime->dma_addr;
card->dma_last_transfer_vaddr[SND_PS3_CH_R] =
card->dma_next_transfer_vaddr[SND_PS3_CH_R] =
card->dma_start_vaddr[SND_PS3_CH_R] =
runtime->dma_area + (runtime->dma_bytes / 2);
card->dma_start_bus_addr[SND_PS3_CH_R] =
runtime->dma_addr + (runtime->dma_bytes / 2);
pr_debug("%s: vaddr=%p bus=%#llx\n", __func__,
card->dma_start_vaddr[SND_PS3_CH_L],
card->dma_start_bus_addr[SND_PS3_CH_L]);
}
spin_unlock_irqrestore(&card->dma_lock, irqsave);
/* ensure the hardware sees the change */
mb();
return 0;
};
static int snd_ps3_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
unsigned long irqsave;
if (!snd_ps3_set_avsetting(substream)) {
write_reg(PS3_AUDIO_AX_IE,
PS3_AUDIO_AX_IE_ASOBEIE(0) |
PS3_AUDIO_AX_IE_ASOBUIE(0));
card->silent = snd_ps3_delay_to_bytes(substream,
card->start_delay) /
(PS3_AUDIO_FIFO_STAGE_SIZE * 4);
}
spin_lock_irqsave(&card->dma_lock, irqsave);
{
card->dma_buffer_size = runtime->dma_bytes;
card->dma_last_transfer_vaddr[SND_PS3_CH_L] =
card->dma_next_transfer_vaddr[SND_PS3_CH_L] =
card->dma_start_vaddr[SND_PS3_CH_L] =
runtime->dma_area;
card->dma_start_bus_addr[SND_PS3_CH_L] = runtime->dma_addr;
card->dma_last_transfer_vaddr[SND_PS3_CH_R] =
card->dma_next_transfer_vaddr[SND_PS3_CH_R] =
card->dma_start_vaddr[SND_PS3_CH_R] =
runtime->dma_area + (runtime->dma_bytes / 2);
card->dma_start_bus_addr[SND_PS3_CH_R] =
runtime->dma_addr + (runtime->dma_bytes / 2);
pr_debug("%s: vaddr=%p bus=%#llx\n", __func__,
card->dma_start_vaddr[SND_PS3_CH_L],
card->dma_start_bus_addr[SND_PS3_CH_L]);
}
spin_unlock_irqrestore(&card->dma_lock, irqsave);
mb();
return 0;
};
/*
* 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;
};