ASoC: sdp4430: Add support for digital microphones

OMAP4 SDP/Blaze boards have digital microphones.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index 052254ac333f5c0ecce06a97be81afef46564315..fb1bf2581efb1b224aadbdd040ec83feab61f88d 100644 (file)
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -100,8 +100,10 @@ config SND_OMAP_SOC_SDP3430
 config SND_OMAP_SOC_SDP4430
        tristate "SoC Audio support for Texas Instruments SDP4430"
        depends on TWL4030_CORE && SND_OMAP_SOC && MACH_OMAP_4430SDP
+       select SND_OMAP_SOC_DMIC
        select SND_OMAP_SOC_MCPDM
        select SND_SOC_TWL6040
+       select SND_SOC_DMIC
        help
          Say Y if you want to add support for SoC audio on Texas Instruments
          SDP4430.

diff --git a/sound/soc/omap/sdp4430.c b/sound/soc/omap/sdp4430.c
index 03d9fa4192fe611a9119986ce17ed9e18648ee4c..2735fa03b74b0dcfb7d1e14f3600e33f5a15176d 100644 (file)
--- a/sound/soc/omap/sdp4430.c
+++ b/sound/soc/omap/sdp4430.c
@@ -33,6 +33,7 @@
 #include <plat/hardware.h>
 #include <plat/mux.h>
 
+#include "omap-dmic.h"
 #include "omap-mcpdm.h"
 #include "omap-pcm.h"
 #include "../codecs/twl6040.h"
@@ -67,6 +68,32 @@ static struct snd_soc_ops sdp4430_ops = {
        .hw_params = sdp4430_hw_params,
 };
 
+static int sdp4430_dmic_hw_params(struct snd_pcm_substream *substream,
+       struct snd_pcm_hw_params *params)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+       int ret = 0;
+
+       ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_SYSCLK_PAD_CLKS,
+                                    19200000, SND_SOC_CLOCK_IN);
+       if (ret < 0) {
+               printk(KERN_ERR "can't set DMIC cpu system clock\n");
+               return ret;
+       }
+       ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_ABE_DMIC_CLK, 2400000,
+                                    SND_SOC_CLOCK_OUT);
+       if (ret < 0) {
+               printk(KERN_ERR "can't set DMIC output clock\n");
+               return ret;
+       }
+       return 0;
+}
+
+static struct snd_soc_ops sdp4430_dmic_ops = {
+       .hw_params = sdp4430_dmic_hw_params,
+};
+
 /* Headset jack */
 static struct snd_soc_jack hs_jack;
 
@@ -148,23 +175,59 @@ static int sdp4430_twl6040_init(struct snd_soc_pcm_runtime *rtd)
        return ret;
 }
 
+static const struct snd_soc_dapm_widget sdp4430_dmic_dapm_widgets[] = {
+       SND_SOC_DAPM_MIC("Digital Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route dmic_audio_map[] = {
+       {"DMic", NULL, "Digital Mic1 Bias"},
+       {"Digital Mic1 Bias", NULL, "Digital Mic"},
+};
+
+static int sdp4430_dmic_init(struct snd_soc_pcm_runtime *rtd)
+{
+       struct snd_soc_codec *codec = rtd->codec;
+       struct snd_soc_dapm_context *dapm = &codec->dapm;
+       int ret;
+
+       ret = snd_soc_dapm_new_controls(dapm, sdp4430_dmic_dapm_widgets,
+                               ARRAY_SIZE(sdp4430_dmic_dapm_widgets));
+       if (ret)
+               return ret;
+
+       return snd_soc_dapm_add_routes(dapm, dmic_audio_map,
+                               ARRAY_SIZE(dmic_audio_map));
+}
+
 /* Digital audio interface glue - connects codec <--> CPU */
-static struct snd_soc_dai_link sdp4430_dai = {
-       .name = "TWL6040",
-       .stream_name = "TWL6040",
-       .cpu_dai_name = "omap-mcpdm",
-       .codec_dai_name = "twl6040-legacy",
-       .platform_name = "omap-pcm-audio",
-       .codec_name = "twl6040-codec",
-       .init = sdp4430_twl6040_init,
-       .ops = &sdp4430_ops,
+static struct snd_soc_dai_link sdp4430_dai[] = {
+       {
+               .name = "TWL6040",
+               .stream_name = "TWL6040",
+               .cpu_dai_name = "omap-mcpdm",
+               .codec_dai_name = "twl6040-legacy",
+               .platform_name = "omap-pcm-audio",
+               .codec_name = "twl6040-codec",
+               .init = sdp4430_twl6040_init,
+               .ops = &sdp4430_ops,
+       },
+       {
+               .name = "DMIC",
+               .stream_name = "DMIC Capture",
+               .cpu_dai_name = "omap-dmic",
+               .codec_dai_name = "dmic-hifi",
+               .platform_name = "omap-pcm-audio",
+               .codec_name = "dmic-codec",
+               .init = sdp4430_dmic_init,
+               .ops = &sdp4430_dmic_ops,
+       },
 };
 
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_sdp4430 = {
        .name = "SDP4430",
-       .dai_link = &sdp4430_dai,
-       .num_links = 1,
+       .dai_link = sdp4430_dai,
+       .num_links = ARRAY_SIZE(sdp4430_dai),
 
        .dapm_widgets = sdp4430_twl6040_dapm_widgets,
        .num_dapm_widgets = ARRAY_SIZE(sdp4430_twl6040_dapm_widgets),