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Date: Thu, 30 Apr 2015 23:28:01 +0200
From: Marek Belisko <marek@...delico.com>
To: perex@...ex.cz, tiwai@...e.de
Cc: broonie@...nel.org, hns@...delico.com, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
Marek Belisko <marek@...delico.com>
Subject: [PATCH 1/3] 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@...delico.com>
---
sound/soc/codecs/Kconfig | 4 ++
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/gtm601.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 112 insertions(+)
create mode 100644 sound/soc/codecs/gtm601.c
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 061c465..c399a5d 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -170,6 +170,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_WM9705 if SND_SOC_AC97_BUS
select SND_SOC_WM9712 if SND_SOC_AC97_BUS
select SND_SOC_WM9713 if SND_SOC_AC97_BUS
+ select SND_SOC_GTM601
help
Normally ASoC codec drivers are only built if a machine driver which
uses them is also built since they are only usable with a machine
@@ -844,6 +845,9 @@ config SND_SOC_WM9712
config SND_SOC_WM9713
tristate
+config SND_SOC_GTM601
+ tristate 'GTM601 UMTS modem audio codec'
+
# Amp
config SND_SOC_LM4857
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index abe2d7e..bcafd4a 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -175,6 +175,7 @@ snd-soc-wm9705-objs := wm9705.o
snd-soc-wm9712-objs := wm9712.o
snd-soc-wm9713-objs := wm9713.o
snd-soc-wm-hubs-objs := wm_hubs.o
+snd-soc-gtm601-objs := gtm601.o
# Amp
snd-soc-max9877-objs := max9877.o
@@ -357,6 +358,7 @@ obj-$(CONFIG_SND_SOC_WM9712) += snd-soc-wm9712.o
obj-$(CONFIG_SND_SOC_WM9713) += snd-soc-wm9713.o
obj-$(CONFIG_SND_SOC_WM_ADSP) += snd-soc-wm-adsp.o
obj-$(CONFIG_SND_SOC_WM_HUBS) += snd-soc-wm-hubs.o
+obj-$(CONFIG_SND_SOC_GTM601) += snd-soc-gtm601.o
# Amp
obj-$(CONFIG_SND_SOC_MAX9877) += snd-soc-max9877.o
diff --git a/sound/soc/codecs/gtm601.c b/sound/soc/codecs/gtm601.c
new file mode 100644
index 0000000..05234a1
--- /dev/null
+++ b/sound/soc/codecs/gtm601.c
@@ -0,0 +1,106 @@
+/*
+ * This is a simple driver for the GTM601 Voice PCM interface
+ *
+ * Copyright (C) 2015 Goldelico GmbH
+ *
+ * Author: Marek Belisko <marek@...delico.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 as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#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" },
+};
+
+/*
+ * Note this is a simple chip with no configuration interface, sample rate is
+ * determined automatically by examining the Master clock and Bit clock ratios
+ */
+
+#define GTM601_RATES (SNDRV_PCM_RATE_8000)
+
+struct snd_soc_dai_driver gtm601_dai = {
+ .name = "gtm601",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = GTM601_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = GTM601_RATES,
+ .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, >m601_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@...delico.com>");
+MODULE_LICENSE("GPL v2");
--
1.9.1
--
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