ASoC: es7134: add es7134 DAC driver

The es7134 is 24bit, 192Khz i2s DA converter for PCM audio.
Datasheet is available here : http://www.everest-semi.com/pdf/ES7134LV%20DS.pdf

This driver is also compatible with the es7144, which is the same as the
es7134, with 2 additional pins for filtering capacitors.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index e49e9da7f1f6e41028a0ca832e76e7dce0bc1c01..7c7c2e96b83659b9d22f571c25c1dc11ad41a446 100644 (file)
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -72,6 +72,7 @@ config SND_SOC_ALL_CODECS
        select SND_SOC_DMIC
        select SND_SOC_ES8328_SPI if SPI_MASTER
        select SND_SOC_ES8328_I2C if I2C
+       select SND_SOC_ES7134
        select SND_SOC_GTM601
        select SND_SOC_HDAC_HDMI
        select SND_SOC_ICS43432
@@ -525,6 +526,9 @@ config SND_SOC_HDMI_CODEC
        select SND_PCM_IEC958
        select HDMI
 
+config SND_SOC_ES7134
+       tristate "Everest Semi ES7134 CODEC"
+
 config SND_SOC_ES8328
        tristate
 

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 1796cb987e712c78b0fe8f3aa8ec71177256b5b2..b65868c963c9e0646c1f977b7cd700f0a9ccad52 100644 (file)
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -63,6 +63,7 @@ snd-soc-da7219-objs := da7219.o da7219-aad.o
 snd-soc-da732x-objs := da732x.o
 snd-soc-da9055-objs := da9055.o
 snd-soc-dmic-objs := dmic.o
+snd-soc-es7134-objs := es7134.o
 snd-soc-es8328-objs := es8328.o
 snd-soc-es8328-i2c-objs := es8328-i2c.o
 snd-soc-es8328-spi-objs := es8328-spi.o
@@ -293,6 +294,7 @@ obj-$(CONFIG_SND_SOC_DA7219)        += snd-soc-da7219.o
 obj-$(CONFIG_SND_SOC_DA732X)   += snd-soc-da732x.o
 obj-$(CONFIG_SND_SOC_DA9055)   += snd-soc-da9055.o
 obj-$(CONFIG_SND_SOC_DMIC)     += snd-soc-dmic.o
+obj-$(CONFIG_SND_SOC_ES7134)   += snd-soc-es7134.o
 obj-$(CONFIG_SND_SOC_ES8328)   += snd-soc-es8328.o
 obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
 obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o

diff --git a/sound/soc/codecs/es7134.c b/sound/soc/codecs/es7134.c
new file mode 100644 (file)
index 0000000..25ede82
--- /dev/null
+++ b/sound/soc/codecs/es7134.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS.
+ * Author: Jerome Brunet <jbrunet@baylibre.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ */
+
+#include <linux/module.h>
+#include <sound/soc.h>
+
+/*
+ * The everest 7134 is a very simple DA converter with no register
+ */
+
+static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+       fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
+               SND_SOC_DAIFMT_MASTER_MASK);
+
+       if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+                   SND_SOC_DAIFMT_CBS_CFS)) {
+               dev_err(codec_dai->dev, "Invalid DAI format\n");
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static const struct snd_soc_dai_ops es7134_dai_ops = {
+       .set_fmt        = es7134_set_fmt,
+};
+
+static struct snd_soc_dai_driver es7134_dai = {
+       .name = "es7134-hifi",
+       .playback = {
+               .stream_name = "Playback",
+               .channels_min = 2,
+               .channels_max = 2,
+               .rates = SNDRV_PCM_RATE_8000_192000,
+               .formats = (SNDRV_PCM_FMTBIT_S16_LE  |
+                           SNDRV_PCM_FMTBIT_S18_3LE |
+                           SNDRV_PCM_FMTBIT_S20_3LE |
+                           SNDRV_PCM_FMTBIT_S24_3LE |
+                           SNDRV_PCM_FMTBIT_S24_LE),
+       },
+       .ops = &es7134_dai_ops,
+};
+
+static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = {
+       SND_SOC_DAPM_OUTPUT("AOUTL"),
+       SND_SOC_DAPM_OUTPUT("AOUTR"),
+       SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
+};
+
+static const struct snd_soc_dapm_route es7134_dapm_routes[] = {
+       { "AOUTL", NULL, "DAC" },
+       { "AOUTR", NULL, "DAC" },
+};
+
+static struct snd_soc_codec_driver es7134_codec_driver = {
+       .component_driver = {
+               .dapm_widgets           = es7134_dapm_widgets,
+               .num_dapm_widgets       = ARRAY_SIZE(es7134_dapm_widgets),
+               .dapm_routes            = es7134_dapm_routes,
+               .num_dapm_routes        = ARRAY_SIZE(es7134_dapm_routes),
+       },
+};
+
+static int es7134_probe(struct platform_device *pdev)
+{
+       return snd_soc_register_codec(&pdev->dev,
+                                     &es7134_codec_driver,
+                                     &es7134_dai, 1);
+}
+
+static int es7134_remove(struct platform_device *pdev)
+{
+       snd_soc_unregister_codec(&pdev->dev);
+       return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id es7134_ids[] = {
+       { .compatible = "everest,es7134", },
+       { .compatible = "everest,es7144", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, es7134_ids);
+#endif
+
+static struct platform_driver es7134_driver = {
+       .driver = {
+               .name = "es7134",
+               .of_match_table = of_match_ptr(es7134_ids),
+       },
+       .probe = es7134_probe,
+       .remove = es7134_remove,
+};
+
+module_platform_driver(es7134_driver);
+
+MODULE_DESCRIPTION("ASoC ES7134 audio codec driver");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_LICENSE("GPL");