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ASoC: tlv320dac33: Clean up the hardware configuration code

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Use switch instead of if statements to configure FIFO bypass
and mode1.
With this change adding new FIFO mode is going to be easier,
and cleaner.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2009-12-31 10:30:21 +02:00 committed by Mark Brown
parent d4f102d437
commit aec242dc37
1 changed files with 45 additions and 16 deletions
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61
sound/soc/codecs/tlv320dac33.c
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@ -707,7 +707,7 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream)
struct snd_soc_codec *codec = socdev->card->codec;
struct tlv320dac33_priv *dac33 = codec->private_data;
unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
u8 aictrl_a, fifoctrl_a;
u8 aictrl_a, aictrl_b, fifoctrl_a;
switch (substream->runtime->rate) {
case 44100:
@ -764,6 +764,7 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream)
dac33_oscwait(codec);
if (dac33->fifo_mode) {
/* Generic for all FIFO modes */
/* 50-51 : ASRC Control registers */
dac33_write(codec, DAC33_ASRC_CTRL_A, (1 << 4)); /* div=2 */
dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
@ -773,38 +774,66 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream)
/* Set interrupts to high active */
dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
} else {
/* FIFO bypass mode */
/* 50-51 : ASRC Control registers */
dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
}
if (dac33->fifo_mode)
/* Interrupt behaviour configuration */
switch (dac33->fifo_mode) {
case DAC33_FIFO_MODE1:
dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
break;
default:
/* in FIFO bypass mode, the interrupts are not used */
break;
}
aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
switch (dac33->fifo_mode) {
case DAC33_FIFO_MODE1:
/*
* For mode1:
* Disable the FIFO bypass (Enable the use of FIFO)
* Select nSample mode
* BCLK is only running when data is needed by DAC33
*/
fifoctrl_a &= ~DAC33_FBYPAS;
else
fifoctrl_a &= ~DAC33_FAUTO;
aictrl_b &= ~DAC33_BCLKON;
break;
default:
/*
* For FIFO bypass mode:
* Enable the FIFO bypass (Disable the FIFO use)
* Set the BCLK as continous
*/
fifoctrl_a |= DAC33_FBYPAS;
aictrl_b |= DAC33_BCLKON;
break;
}
dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
reg_tmp = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
if (dac33->fifo_mode)
reg_tmp &= ~DAC33_BCLKON;
else
reg_tmp |= DAC33_BCLKON;
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg_tmp);
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
if (dac33->fifo_mode) {
switch (dac33->fifo_mode) {
case DAC33_FIFO_MODE1:
/* 20: BCLK divide ratio */
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 3);
dac33_write16(codec, DAC33_ATHR_MSB,
DAC33_THRREG(dac33->alarm_threshold));
} else {
break;
default:
/* BYPASS mode */
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
break;
}
mutex_unlock(&dac33->mutex);