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Commit 4a295ca4 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Takashi Iwai
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[ALSA] at73c213: monaural support 



Add support for monaural playback to at73c213 driver.  The sound will be apear
on L-channel.  Tested on AT91SAM9260-EK.

Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent c67582b1

sound/spi/at73c213.c

+15 −4
Original line number Diff line number Diff line
@@ -118,7 +118,7 @@ static struct snd_pcm_hardware snd_at73c213_playback_hw = { 
	.rates		= SNDRV_PCM_RATE_CONTINUOUS,

	.rate_min	= 8000,  /* Replaced by chip->bitrate later. */

	.rate_max	= 50000, /* Replaced by chip->bitrate later. */

	.channels_min	= 2,

	.channels_min	= 1,

	.channels_max	= 2,

	.buffer_bytes_max = 64 * 1024 - 1,

	.period_bytes_min = 512,
@@ -229,6 +229,14 @@ static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) 
static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,

				 struct snd_pcm_hw_params *hw_params)

{

	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);

	int channels = params_channels(hw_params);

	int val;



	val = ssc_readl(chip->ssc->regs, TFMR);

	val = SSC_BFINS(TFMR_DATNB, channels - 1, val);

	ssc_writel(chip->ssc->regs, TFMR, val);



	return snd_pcm_lib_malloc_pages(substream,

					params_buffer_bytes(hw_params));

}
@@ -250,10 +258,12 @@ static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) 


	ssc_writel(chip->ssc->regs, PDC_TPR,

			(long)runtime->dma_addr);

	ssc_writel(chip->ssc->regs, PDC_TCR, runtime->period_size * 2);

	ssc_writel(chip->ssc->regs, PDC_TCR,

			runtime->period_size * runtime->channels);

	ssc_writel(chip->ssc->regs, PDC_TNPR,

			(long)runtime->dma_addr + block_size);

	ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2);

	ssc_writel(chip->ssc->regs, PDC_TNCR,

			runtime->period_size * runtime->channels);



	return 0;

}
@@ -376,7 +386,8 @@ static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) 


		ssc_writel(chip->ssc->regs, PDC_TNPR,

				(long)runtime->dma_addr + offset);

		ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2);

		ssc_writel(chip->ssc->regs, PDC_TNCR,

				runtime->period_size * runtime->channels);

		retval = IRQ_HANDLED;

	}