1 files changed, 25 insertions, 113 deletions

diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
index 173a239a541c..130b12118d4f 100644
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -56,30 +56,14 @@
 
 #define MCLK_RATE 12000000
 
-static struct clk *mclk;
-
-static int at91sam9g20ek_startup(struct snd_pcm_substream *substream)
-{
-        struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
-        struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
-        int ret;
-
-        ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
-                MCLK_RATE, SND_SOC_CLOCK_IN);
-        if (ret < 0) {
-                clk_disable(mclk);
-                return ret;
-        }
-
-        return 0;
-}
-
-static void at91sam9g20ek_shutdown(struct snd_pcm_substream *substream)
-{
-        struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
+/*
+ * As shipped the board does not have inputs.  However, it is relatively
+ * straightforward to modify the board to hook them up so support is left
+ * in the driver.
+ */
+#undef ENABLE_MIC_INPUT
 
-        dev_dbg(rtd->socdev->dev, "shutdown");
-}
+static struct clk *mclk;
 
 static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
         struct snd_pcm_hw_params *params)
@@ -87,102 +71,17 @@ 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;
 
@@ -190,9 +89,7 @@ static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
 }
 
 static struct snd_soc_ops at91sam9g20ek_ops = {
-        .startup = at91sam9g20ek_startup,
         .hw_params = at91sam9g20ek_hw_params,
-        .shutdown = at91sam9g20ek_shutdown,
 };
 
 static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
@@ -241,10 +138,20 @@ static const struct snd_soc_dapm_route intercon[] = {
  */
 static int at91sam9g20ek_wm8731_init(struct snd_soc_codec *codec)
 {
+        struct snd_soc_dai *codec_dai = &codec->dai[0];
+        int ret;
+
         printk(KERN_DEBUG
                         "at91sam9g20ek_wm8731 "
                         ": at91sam9g20ek_wm8731_init() called\n");
 
+        ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
+                MCLK_RATE, SND_SOC_CLOCK_IN);
+        if (ret < 0) {
+                printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
+                return ret;
+        }
+
         /* Add specific widgets */
         snd_soc_dapm_new_controls(codec, at91sam9g20ek_dapm_widgets,
                                   ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
@@ -255,8 +162,13 @@ static int at91sam9g20ek_wm8731_init(struct snd_soc_codec *codec)
         snd_soc_dapm_nc_pin(codec, "RLINEIN");
         snd_soc_dapm_nc_pin(codec, "LLINEIN");
 
-        /* always connected */
+#ifdef ENABLE_MIC_INPUT
         snd_soc_dapm_enable_pin(codec, "Int Mic");
+#else
+        snd_soc_dapm_nc_pin(codec, "Int Mic");
+#endif
+
+        /* always connected */
         snd_soc_dapm_enable_pin(codec, "Ext Spk");
 
         snd_soc_dapm_sync(codec);