C++ (Cpp) snd_ps3_delay_to_bytes Examples

Example #1

File: snd_ps3.c Project: CSCLOG/beaglebone

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;
};

Example #2

File: snd_ps3.c Project: MiniBlu/cm11_kernel_htc_msm8974a3ul

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;
};