ASoC: Add gtm601 codec driver

This driver add PCM interface to a GTM601 UMTS modem chip.
There is no configuration interface.

Signed-off-by: Marek Belisko <marek@goldelico.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

3 files changed, 104 insertions, 0 deletions

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index efaafce8ba38..1b7c49214c25 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -62,6 +62,7 @@ config SND_SOC_ALL_CODECS
         select SND_SOC_BT_SCO
         select SND_SOC_ES8328_SPI if SPI_MASTER
         select SND_SOC_ES8328_I2C if I2C
+        select SND_SOC_GTM601
         select SND_SOC_ISABELLE if I2C
         select SND_SOC_JZ4740_CODEC
         select SND_SOC_LM4857 if I2C
@@ -446,6 +447,9 @@ config SND_SOC_ES8328_SPI
         tristate
         select SND_SOC_ES8328
 
+config SND_SOC_GTM601
+        tristate 'GTM601 UMTS modem audio codec'
+
 config SND_SOC_ISABELLE
         tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index cf160d972cb3..365529d28465 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -55,6 +55,7 @@ snd-soc-dmic-objs := dmic.o
 snd-soc-es8328-objs := es8328.o
 snd-soc-es8328-i2c-objs := es8328-i2c.o
 snd-soc-es8328-spi-objs := es8328-spi.o
+snd-soc-gtm601-objs := gtm601.o
 snd-soc-isabelle-objs := isabelle.o
 snd-soc-jz4740-codec-objs := jz4740.o
 snd-soc-l3-objs := l3.o
@@ -242,6 +243,7 @@ obj-$(CONFIG_SND_SOC_DMIC)	+= snd-soc-dmic.o
 obj-$(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
+obj-$(CONFIG_SND_SOC_GTM601)    += snd-soc-gtm601.o
 obj-$(CONFIG_SND_SOC_ISABELLE)  += snd-soc-isabelle.o
 obj-$(CONFIG_SND_SOC_JZ4740_CODEC)      += snd-soc-jz4740-codec.o
 obj-$(CONFIG_SND_SOC_L3)        += snd-soc-l3.o
diff --git a/sound/soc/codecs/gtm601.c b/sound/soc/codecs/gtm601.c
new file mode 100644
index 000000000000..1b77ff2d6d14
--- /dev/null
+++ b/sound/soc/codecs/gtm601.c
@@ -0,0 +1,98 @@
+/*
+ * This is a simple driver for the GTM601 Voice PCM interface
+ *
+ * Copyright (C) 2015 Goldelico GmbH
+ *
+ * Author: Marek Belisko <marek@goldelico.com>
+ *
+ * Based on wm8727.c driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+static const struct snd_soc_dapm_widget gtm601_dapm_widgets[] = {
+        SND_SOC_DAPM_OUTPUT("AOUT"),
+        SND_SOC_DAPM_INPUT("AIN"),
+};
+
+static const struct snd_soc_dapm_route gtm601_dapm_routes[] = {
+        { "AOUT", NULL, "Playback" },
+        { "Capture", NULL, "AIN" },
+};
+
+struct snd_soc_dai_driver gtm601_dai = {
+        .name = "gtm601",
+        .playback = {
+                .stream_name = "Playback",
+                .channels_min = 1,
+                .channels_max = 1,
+                .rates = SNDRV_PCM_RATE_8000,
+                .formats = SNDRV_PCM_FMTBIT_S16_LE,
+                },
+        .capture = {
+                .stream_name = "Capture",
+                .channels_min = 1,
+                .channels_max = 1,
+                .rates = SNDRV_PCM_RATE_8000,
+                .formats = SNDRV_PCM_FMTBIT_S16_LE,
+        },
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_gtm601 = {
+        .dapm_widgets = gtm601_dapm_widgets,
+        .num_dapm_widgets = ARRAY_SIZE(gtm601_dapm_widgets),
+        .dapm_routes = gtm601_dapm_routes,
+        .num_dapm_routes = ARRAY_SIZE(gtm601_dapm_routes),
+};
+
+static int gtm601_platform_probe(struct platform_device *pdev)
+{
+        return snd_soc_register_codec(&pdev->dev,
+                        &soc_codec_dev_gtm601, &gtm601_dai, 1);
+}
+
+static int gtm601_platform_remove(struct platform_device *pdev)
+{
+        snd_soc_unregister_codec(&pdev->dev);
+        return 0;
+}
+
+MODULE_ALIAS("platform:gtm601_codec_audio");
+
+#if defined(CONFIG_OF)
+static const struct of_device_id gtm601_codec_of_match[] = {
+        { .compatible = "option,gtm601", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, gtm601_codec_of_match);
+#endif
+
+static struct platform_driver gtm601_codec_driver = {
+        .driver = {
+                        .name = "gtm601",
+                        .owner = THIS_MODULE,
+                        .of_match_table = of_match_ptr(gtm601_codec_of_match),
+        },
+
+        .probe = gtm601_platform_probe,
+        .remove = gtm601_platform_remove,
+};
+
+module_platform_driver(gtm601_codec_driver);
+
+MODULE_DESCRIPTION("ASoC gtm601 driver");
+MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>");
+MODULE_LICENSE("GPL");