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ALSA: AC97: add full duplex support for atmel AT91 and AVR. 

This patch add full duplex support on AT91 and AVR.
It was a bug: we needed to check first if there are some chips opened so we
could enable both reception and sending of the data.

Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Sedji Gaouaou 2010-02-25 18:59:40 +01:00 committed by Takashi Iwai
parent 7177395fdd
commit ec2755a93d
1 changed files with 12 additions and 4 deletions
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16
sound/atmel/ac97c.c
View File

@ -339,7 +339,11 @@ static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
ac97c_writel(chip, OCA, word);
/* configure sample format and size */
word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
word = ac97c_readl(chip, CAMR);
if (chip->opened <= 1)
word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
else
word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
@ -426,7 +430,11 @@ static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
ac97c_writel(chip, ICA, word);
/* configure sample format and size */
word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
word = ac97c_readl(chip, CAMR);
if (chip->opened <= 1)
word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
else
word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
@ -506,7 +514,7 @@ atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
} else {
ptcr = ATMEL_PDC_TXTEN;
}
camr |= AC97C_CMR_CENA;
camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
@ -551,7 +559,7 @@ atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
} else {
ptcr = ATMEL_PDC_RXTEN;
}
camr |= AC97C_CMR_CENA;
camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */