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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2008-03-08 11:08:32 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-04-24 12:00:22 +0200 |
| commit | 4a295ca47424b48c993d5cea7c3fbeca75ddb608 (patch) | |
| tree | e27cff5cc6c01e52ec07bb2c73ccab25b528b1ed /sound/spi/at73c213.c | |
| parent | c67582b195fb5deb24808ebbafb41045f1a61425 (diff) | |
| download | lwn-4a295ca47424b48c993d5cea7c3fbeca75ddb608.tar.gz lwn-4a295ca47424b48c993d5cea7c3fbeca75ddb608.zip | |
[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: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/spi/at73c213.c')
| -rw-r--r-- | sound/spi/at73c213.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c index c1b0b9dff819..1355fe0c6674 100644 --- a/sound/spi/at73c213.c +++ b/sound/spi/at73c213.c @@ -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; } |