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ASoC: switch PXA SSP driver from network mode to PSP

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This switches the pxa ssp port usage from network mode to PSP mode.
Removed some comments and checks for configured TDM channels.
A special case is added to support configuration where BCLK = 64fs. We
need to do some black magic in this case which doesn't look nice but
there is unfortunately no other option than that.

Diagnosed-by: Tim Ruetz <tim@caiaq.de>
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Daniel Mack 2009-03-12 11:27:49 +01:00 committed by Mark Brown
parent 77dd7e17b8
commit 72d7466468
1 changed files with 33 additions and 11 deletions
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44
sound/soc/pxa/pxa-ssp.c
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@ -558,18 +558,17 @@ static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
sscr0 |= SSCR0_MOD | SSCR0_PSP;
sscr0 |= SSCR0_PSP;
sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
sspsp |= SSPSP_FSRT;
break;
case SND_SOC_DAIFMT_NB_IF:
sspsp |= SSPSP_SFRMP | SSPSP_FSRT;
sspsp |= SSPSP_SFRMP;
break;
case SND_SOC_DAIFMT_IB_IF:
sspsp |= SSPSP_SFRMP;
sspsp |= SSPSP_SFRMP | SSPSP_SCMODE(3);
break;
default:
return -EINVAL;
@ -655,33 +654,56 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
sscr0 |= SSCR0_FPCKE;
#endif
sscr0 |= SSCR0_DataSize(16);
/* use network mode (2 slots) for 16 bit stereo */
break;
case SNDRV_PCM_FORMAT_S24_LE:
sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
/* we must be in network mode (2 slots) for 24 bit stereo */
break;
case SNDRV_PCM_FORMAT_S32_LE:
sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
/* we must be in network mode (2 slots) for 32 bit stereo */
break;
}
ssp_write_reg(ssp, SSCR0, sscr0);
switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
/* Cleared when the DAI format is set */
sspsp = ssp_read_reg(ssp, SSPSP) | SSPSP_SFRMWDTH(width);
sspsp = ssp_read_reg(ssp, SSPSP);
if (((sscr0 & SSCR0_SCR) == SSCR0_SerClkDiv(4)) &&
(width == 16)) {
/* This is a special case where the bitclk is 64fs
* and we're not dealing with 2*32 bits of audio
* samples.
*
* The SSP values used for that are all found out by
* trying and failing a lot; some of the registers
* needed for that mode are only available on PXA3xx.
*/
#ifdef CONFIG_PXA3xx
if (!cpu_is_pxa3xx())
return -EINVAL;
sspsp |= SSPSP_SFRMWDTH(width * 2);
sspsp |= SSPSP_SFRMDLY(width * 4);
sspsp |= SSPSP_EDMYSTOP(3);
sspsp |= SSPSP_DMYSTOP(3);
sspsp |= SSPSP_DMYSTRT(1);
#else
return -EINVAL;
#endif
} else
sspsp |= SSPSP_SFRMWDTH(width);
ssp_write_reg(ssp, SSPSP, sspsp);
break;
default:
break;
}
/* We always use a network mode so we always require TDM slots
/* When we use a network mode, we always require TDM slots
* - complain loudly and fail if they've not been set up yet.
*/
if (!(ssp_read_reg(ssp, SSTSA) & 0xf)) {
if ((sscr0 & SSCR0_MOD) && !(ssp_read_reg(ssp, SSTSA) & 0xf)) {
dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
return -EINVAL;
}