ASoC: IMote2 ASoC Support

This patch adds the ASoC side of the board support for the Crossbow
IMB400 daughter board.

Thanks to Crossbow for considerable assistance.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/pxa/Kconfig b/sound/soc/pxa/Kconfig
index ad8a10f..eb75a1c 100644 (file)
--- a/sound/soc/pxa/Kconfig
+++ b/sound/soc/pxa/Kconfig
@@ -134,3 +134,12 @@ config SND_PXA2XX_SOC_MIOA701
         help
           Say Y if you want to add support for SoC audio on the
           MIO A701.
+
+config SND_PXA2XX_SOC_IMOTE2
+       tristate "SoC Audio support for IMote 2"
+       depends on SND_PXA2XX_SOC && MACH_INTELMOTE2
+       select SND_PXA2XX_SOC_I2S
+       select SND_SOC_WM8940
+       help
+         Say Y if you want to add support for SoC audio on the
+        IMote 2.

diff --git a/sound/soc/pxa/Makefile b/sound/soc/pxa/Makefile
index 4b90c3c..6e096b4 100644 (file)
--- a/sound/soc/pxa/Makefile
+++ b/sound/soc/pxa/Makefile
@@ -22,6 +22,7 @@ snd-soc-palm27x-objs := palm27x.o
 snd-soc-zylonite-objs := zylonite.o
 snd-soc-magician-objs := magician.o
 snd-soc-mioa701-objs := mioa701_wm9713.o
+snd-soc-imote2-objs := imote2.o
 
 obj-$(CONFIG_SND_PXA2XX_SOC_CORGI) += snd-soc-corgi.o
 obj-$(CONFIG_SND_PXA2XX_SOC_POODLE) += snd-soc-poodle.o
@@ -35,3 +36,4 @@ obj-$(CONFIG_SND_PXA2XX_SOC_PALM27X) += snd-soc-palm27x.o
 obj-$(CONFIG_SND_PXA2XX_SOC_MAGICIAN) += snd-soc-magician.o
 obj-$(CONFIG_SND_PXA2XX_SOC_MIOA701) += snd-soc-mioa701.o
 obj-$(CONFIG_SND_SOC_ZYLONITE) += snd-soc-zylonite.o
+obj-$(CONFIG_SND_PXA2XX_SOC_IMOTE2) += snd-soc-imote2.o

diff --git a/sound/soc/pxa/imote2.c b/sound/soc/pxa/imote2.c
new file mode 100644 (file)
index 0000000..405587a
--- /dev/null
+++ b/sound/soc/pxa/imote2.c
@@ -0,0 +1,114 @@
+
+#include <linux/module.h>
+#include <sound/soc.h>
+
+#include <asm/mach-types.h>
+
+#include "../codecs/wm8940.h"
+#include "pxa2xx-i2s.h"
+#include "pxa2xx-pcm.h"
+
+static int imote2_asoc_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 *codec_dai = rtd->dai->codec_dai;
+       struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+       unsigned int clk = 0;
+       int ret;
+
+       switch (params_rate(params)) {
+       case 8000:
+       case 16000:
+       case 48000:
+       case 96000:
+               clk = 12288000;
+               break;
+       case 11025:
+       case 22050:
+       case 44100:
+               clk = 11289600;
+               break;
+       }
+
+       /* 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);
+       if (ret < 0)
+               return ret;
+
+       /* CPU should be clock master */
+       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;
+
+       ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
+                                    SND_SOC_CLOCK_IN);
+       if (ret < 0)
+               return ret;
+
+       /* set the I2S system clock as input (unused) */
+       ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
+               SND_SOC_CLOCK_OUT);
+
+       return ret;
+}
+
+static struct snd_soc_ops imote2_asoc_ops = {
+       .hw_params = imote2_asoc_hw_params,
+};
+
+static struct snd_soc_dai_link imote2_dai = {
+       .name = "WM8940",
+       .stream_name = "WM8940",
+       .cpu_dai = &pxa_i2s_dai,
+       .codec_dai = &wm8940_dai,
+       .ops = &imote2_asoc_ops,
+};
+
+static struct snd_soc_card snd_soc_imote2 = {
+       .name = "Imote2",
+       .platform = &pxa2xx_soc_platform,
+       .dai_link = &imote2_dai,
+       .num_links = 1,
+};
+
+static struct snd_soc_device imote2_snd_devdata = {
+       .card = &snd_soc_imote2,
+       .codec_dev = &soc_codec_dev_wm8940,
+};
+
+static struct platform_device *imote2_snd_device;
+
+static int __init imote2_asoc_init(void)
+{
+       int ret;
+
+       if (!machine_is_intelmote2())
+               return -ENODEV;
+       imote2_snd_device = platform_device_alloc("soc-audio", -1);
+       if (!imote2_snd_device)
+               return -ENOMEM;
+
+       platform_set_drvdata(imote2_snd_device, &imote2_snd_devdata);
+       imote2_snd_devdata.dev = &imote2_snd_device->dev;
+       ret = platform_device_add(imote2_snd_device);
+       if (ret)
+               platform_device_put(imote2_snd_device);
+
+       return ret;
+}
+module_init(imote2_asoc_init);
+
+static void __exit imote2_asoc_exit(void)
+{
+       platform_device_unregister(imote2_snd_device);
+}
+module_exit(imote2_asoc_exit);
+
+MODULE_AUTHOR("Jonathan Cameron");
+MODULE_DESCRIPTION("ALSA SoC Imote 2");
+MODULE_LICENSE("GPL");