ASoC: Intel: Add Baytrail byt-max98090 machine driver

Add machine driver and ACPI probing for Baytrail SST with MAX98090 codec.

Jack detect code from Kevin Strasser <kevin.strasser@intel.com>, GPIO
resolving from Mika Westerberg <mika.westerberg@linux.intel.com> and fixes
and cleanups from Liam Girdwood <liam.r.girdwood@linux.intel.com>.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/intel/Kconfig

@@ -49,3 +49,12 @@ config SND_SOC_INTEL_BYT_RT5640_MACH
 	help
 	  This adds audio driver for Intel Baytrail platform based boards
 	  with the RT5640 audio codec.
+
+config SND_SOC_INTEL_BYT_MAX98090_MACH
+	tristate "ASoC Audio driver for Intel Baytrail with MAX98090 codec"
+	depends on SND_SOC_INTEL_SST && X86_INTEL_LPSS
+	select SND_SOC_INTEL_BAYTRAIL
+	select SND_SOC_MAX98090
+	help
+	  This adds audio driver for Intel Baytrail platform based boards
+	  with the MAX98090 audio codec.

sound/soc/intel/Makefile

@@ -23,6 +23,8 @@ obj-$(CONFIG_SND_SOC_INTEL_BAYTRAIL) += snd-soc-sst-baytrail-pcm.o
 # Machine support
 snd-soc-sst-haswell-objs := haswell.o
 snd-soc-sst-byt-rt5640-mach-objs := byt-rt5640.o
+snd-soc-sst-byt-max98090-mach-objs := byt-max98090.o
 
 obj-$(CONFIG_SND_SOC_INTEL_HASWELL_MACH) += snd-soc-sst-haswell.o
 obj-$(CONFIG_SND_SOC_INTEL_BYT_RT5640_MACH) += snd-soc-sst-byt-rt5640-mach.o
+obj-$(CONFIG_SND_SOC_INTEL_BYT_MAX98090_MACH) += snd-soc-sst-byt-max98090-mach.o

sound/soc/intel/byt-max98090.c

@@ -0,0 +1,203 @@
+/*
+ * Intel Baytrail SST MAX98090 machine driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include "../codecs/max98090.h"
+
+struct byt_max98090_private {
+	struct snd_soc_jack jack;
+};
+
+static const struct snd_soc_dapm_widget byt_max98090_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_MIC("Headset Mic", NULL),
+	SND_SOC_DAPM_MIC("Int Mic", NULL),
+	SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route byt_max98090_audio_map[] = {
+	{"IN34", NULL, "Headset Mic"},
+	{"IN34", NULL, "MICBIAS"},
+	{"MICBIAS", NULL, "Headset Mic"},
+	{"DMICL", NULL, "Int Mic"},
+	{"Headphone", NULL, "HPL"},
+	{"Headphone", NULL, "HPR"},
+	{"Ext Spk", NULL, "SPKL"},
+	{"Ext Spk", NULL, "SPKR"},
+};
+
+static const struct snd_kcontrol_new byt_max98090_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Headphone"),
+	SOC_DAPM_PIN_SWITCH("Headset Mic"),
+	SOC_DAPM_PIN_SWITCH("Int Mic"),
+	SOC_DAPM_PIN_SWITCH("Ext Spk"),
+};
+
+static struct snd_soc_jack_pin hs_jack_pins[] = {
+	{
+		.pin	= "Headphone",
+		.mask	= SND_JACK_HEADPHONE,
+	},
+	{
+		.pin	= "Headset Mic",
+		.mask	= SND_JACK_MICROPHONE,
+	},
+	{
+		.pin	= "Ext Spk",
+		.mask	= SND_JACK_LINEOUT,
+	},
+	{
+		.pin	= "Int Mic",
+		.mask	= SND_JACK_LINEIN,
+	},
+};
+
+static struct snd_soc_jack_gpio hs_jack_gpios[] = {
+	{
+		.name		= "hp-gpio",
+		.idx		= 0,
+		.report		= SND_JACK_HEADPHONE | SND_JACK_LINEOUT,
+		.debounce_time	= 200,
+	},
+	{
+		.name		= "mic-gpio",
+		.idx		= 1,
+		.report		= SND_JACK_MICROPHONE | SND_JACK_LINEIN,
+		.debounce_time	= 200,
+	},
+};
+
+static int byt_max98090_init(struct snd_soc_pcm_runtime *runtime)
+{
+	int ret;
+	struct snd_soc_codec *codec = runtime->codec;
+	struct snd_soc_card *card = runtime->card;
+	struct byt_max98090_private *drv = snd_soc_card_get_drvdata(card);
+	struct snd_soc_jack *jack = &drv->jack;
+
+	card->dapm.idle_bias_off = true;
+
+	ret = snd_soc_dai_set_sysclk(runtime->codec_dai,
+				     M98090_REG_SYSTEM_CLOCK,
+				     25000000, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(card->dev, "Can't set codec clock %d\n", ret);
+		return ret;
+	}
+
+	/* Enable jack detection */
+	ret = snd_soc_jack_new(codec, "Headphone", SND_JACK_HEADPHONE, jack);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_jack_add_pins(jack, ARRAY_SIZE(hs_jack_pins),
+				    hs_jack_pins);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_jack_add_gpiods(card->dev->parent, jack,
+				      ARRAY_SIZE(hs_jack_gpios),
+				      hs_jack_gpios);
+	if (ret)
+		return ret;
+
+	return max98090_mic_detect(codec, jack);
+}
+
+static struct snd_soc_dai_link byt_max98090_dais[] = {
+	{
+		.name = "Baytrail Audio",
+		.stream_name = "Audio",
+		.cpu_dai_name = "baytrail-pcm-audio",
+		.codec_dai_name = "HiFi",
+		.codec_name = "i2c-193C9890:00",
+		.platform_name = "baytrail-pcm-audio",
+		.init = byt_max98090_init,
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			   SND_SOC_DAIFMT_CBS_CFS,
+	},
+};
+
+static struct snd_soc_card byt_max98090_card = {
+	.name = "byt-max98090",
+	.dai_link = byt_max98090_dais,
+	.num_links = ARRAY_SIZE(byt_max98090_dais),
+	.dapm_widgets = byt_max98090_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(byt_max98090_widgets),
+	.dapm_routes = byt_max98090_audio_map,
+	.num_dapm_routes = ARRAY_SIZE(byt_max98090_audio_map),
+	.controls = byt_max98090_controls,
+	.num_controls = ARRAY_SIZE(byt_max98090_controls),
+};
+
+static int byt_max98090_probe(struct platform_device *pdev)
+{
+	int ret_val = 0;
+	struct byt_max98090_private *priv;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_ATOMIC);
+	if (!priv) {
+		dev_err(&pdev->dev, "allocation failed\n");
+		return -ENOMEM;
+	}
+
+	byt_max98090_card.dev = &pdev->dev;
+	snd_soc_card_set_drvdata(&byt_max98090_card, priv);
+	ret_val = devm_snd_soc_register_card(&pdev->dev, &byt_max98090_card);
+	if (ret_val) {
+		dev_err(&pdev->dev,
+			"snd_soc_register_card failed %d\n", ret_val);
+		return ret_val;
+	}
+
+	return ret_val;
+}
+
+static int byt_max98090_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct byt_max98090_private *priv = snd_soc_card_get_drvdata(card);
+
+	snd_soc_jack_free_gpios(&priv->jack, ARRAY_SIZE(hs_jack_gpios),
+				hs_jack_gpios);
+
+	return 0;
+}
+
+static struct platform_driver byt_max98090_driver = {
+	.probe = byt_max98090_probe,
+	.remove = byt_max98090_remove,
+	.driver = {
+		.name = "byt-max98090",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+	},
+};
+module_platform_driver(byt_max98090_driver)
+
+MODULE_DESCRIPTION("ASoC Intel(R) Baytrail Machine driver");
+MODULE_AUTHOR("Omair Md Abdullah, Jarkko Nikula");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:byt-max98090");

sound/soc/intel/sst-acpi.c

@@ -247,6 +247,7 @@ static struct sst_acpi_desc sst_acpi_broadwell_desc = {
 
 static struct sst_acpi_mach baytrail_machines[] = {
 	{ "10EC5640", "byt-rt5640", "intel/fw_sst_0f28.bin-i2s_master" },
+	{ "193C9890", "byt-max98090", "intel/fw_sst_0f28.bin-i2s_master" },
 	{}
 };