diff options
| -rw-r--r-- | sound/soc/atmel/sam9g20_wm8731.c | 89 |
1 files changed, 2 insertions, 87 deletions
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c index 173a239..9abab94 100644 --- a/sound/soc/atmel/sam9g20_wm8731.c +++ b/sound/soc/atmel/sam9g20_wm8731.c @@ -87,102 +87,17 @@ static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; - struct atmel_ssc_info *ssc_p = cpu_dai->private_data; - struct ssc_device *ssc = ssc_p->ssc; int ret; - unsigned int rate; - int cmr_div, period; - - if (ssc == NULL) { - printk(KERN_INFO "at91sam9g20ek_hw_params: ssc is NULL!\n"); - return -EINVAL; - } - /* set codec DAI configuration */ ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | - SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); + SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); if (ret < 0) return ret; /* set cpu DAI configuration */ ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | - SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); - if (ret < 0) - return ret; - - /* - * The SSC clock dividers depend on the sample rate. The CMR.DIV - * field divides the system master clock MCK to drive the SSC TK - * signal which provides the codec BCLK. The TCMR.PERIOD and - * RCMR.PERIOD fields further divide the BCLK signal to drive - * the SSC TF and RF signals which provide the codec DACLRC and - * ADCLRC clocks. - * - * The dividers were determined through trial and error, where a - * CMR.DIV value is chosen such that the resulting BCLK value is - * divisible, or almost divisible, by (2 * sample rate), and then - * the TCMR.PERIOD or RCMR.PERIOD is BCLK / (2 * sample rate) - 1. - */ - rate = params_rate(params); - - switch (rate) { - case 8000: - cmr_div = 55; /* BCLK = 133MHz/(2*55) = 1.209MHz */ - period = 74; /* LRC = BCLK/(2*(74+1)) ~= 8060,6Hz */ - break; - case 11025: - cmr_div = 67; /* BCLK = 133MHz/(2*60) = 1.108MHz */ - period = 45; /* LRC = BCLK/(2*(49+1)) = 11083,3Hz */ - break; - case 16000: - cmr_div = 63; /* BCLK = 133MHz/(2*63) = 1.055MHz */ - period = 32; /* LRC = BCLK/(2*(32+1)) = 15993,2Hz */ - break; - case 22050: - cmr_div = 52; /* BCLK = 133MHz/(2*52) = 1.278MHz */ - period = 28; /* LRC = BCLK/(2*(28+1)) = 22049Hz */ - break; - case 32000: - cmr_div = 66; /* BCLK = 133MHz/(2*66) = 1.007MHz */ - period = 15; /* LRC = BCLK/(2*(15+1)) = 31486,742Hz */ - break; - case 44100: - cmr_div = 29; /* BCLK = 133MHz/(2*29) = 2.293MHz */ - period = 25; /* LRC = BCLK/(2*(25+1)) = 44098Hz */ - break; - case 48000: - cmr_div = 33; /* BCLK = 133MHz/(2*33) = 2.015MHz */ - period = 20; /* LRC = BCLK/(2*(20+1)) = 47979,79Hz */ - break; - case 88200: - cmr_div = 29; /* BCLK = 133MHz/(2*29) = 2.293MHz */ - period = 12; /* LRC = BCLK/(2*(12+1)) = 88196Hz */ - break; - case 96000: - cmr_div = 23; /* BCLK = 133MHz/(2*23) = 2.891MHz */ - period = 14; /* LRC = BCLK/(2*(14+1)) = 96376Hz */ - break; - default: - printk(KERN_WARNING "unsupported rate %d" - " on at91sam9g20ek board\n", rate); - return -EINVAL; - } - - /* set the MCK divider for BCLK */ - ret = snd_soc_dai_set_clkdiv(cpu_dai, ATMEL_SSC_CMR_DIV, cmr_div); - if (ret < 0) - return ret; - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - /* set the BCLK divider for DACLRC */ - ret = snd_soc_dai_set_clkdiv(cpu_dai, - ATMEL_SSC_TCMR_PERIOD, period); - } else { - /* set the BCLK divider for ADCLRC */ - ret = snd_soc_dai_set_clkdiv(cpu_dai, - ATMEL_SSC_RCMR_PERIOD, period); - } + SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); if (ret < 0) return ret; |