[PATCH] ASoC: Intel: Boards: Add CNL RT274 I2S machine driver

[Guneshwor Singh <guneshwor.o.singh@intel.com>]

Add CNL I2S machine driver using Realtek RT274 codec in I2S mode
configured to ssp0.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
---
 sound/soc/intel/boards/Kconfig     |  13 ++
 sound/soc/intel/boards/Makefile    |   2 +
 sound/soc/intel/boards/cnl_rt274.c | 250 +++++++++++++++++++++++++++++++++++++
 3 files changed, 265 insertions(+)
 create mode 100644 sound/soc/intel/boards/cnl_rt274.c

diff --git a/sound/soc/intel/boards/Kconfig b/sound/soc/intel/boards/Kconfig
index 6f754708a48c..29066f0b744f 100644
--- a/sound/soc/intel/boards/Kconfig
+++ b/sound/soc/intel/boards/Kconfig
@@ -262,4 +262,17 @@ config SND_SOC_INTEL_KBL_RT5663_RT5514_MAX98927_MACH
           Say Y if you have such a device.
           If unsure select "N".
 
+config SND_SOC_INTEL_CNL_RT274_MACH
+	tristate "ASoC Audio driver for Cannonlake with RT274 I2S mode"
+	depends on X86 && ACPI && I2C
+	select SND_SOC_INTEL_SST
+	depends on SND_SOC_INTEL_SKYLAKE
+	select SND_SOC_RT274
+	select SND_SOC_DMIC
+	help
+	   This adds support for ASoC machine driver for Cannonlake platform
+	   with RT274 I2S audio codec.
+	   Say Y if you have such a device.
+	   If unsure select "N".
+
 endif
diff --git a/sound/soc/intel/boards/Makefile b/sound/soc/intel/boards/Makefile
index a5c5bc5732a2..915d2ab9cdd6 100644
--- a/sound/soc/intel/boards/Makefile
+++ b/sound/soc/intel/boards/Makefile
@@ -18,6 +18,7 @@ snd-soc-kbl_rt5663_rt5514_max98927-objs := kbl_rt5663_rt5514_max98927.o
 snd-soc-skl_rt286-objs := skl_rt286.o
 snd-skl_nau88l25_max98357a-objs := skl_nau88l25_max98357a.o
 snd-soc-skl_nau88l25_ssm4567-objs := skl_nau88l25_ssm4567.o
+snd-soc-cnl-rt274-objs := cnl_rt274.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
@@ -39,3 +40,4 @@ obj-$(CONFIG_SND_SOC_INTEL_KBL_RT5663_RT5514_MAX98927_MACH) += snd-soc-kbl_rt566
 obj-$(CONFIG_SND_SOC_INTEL_SKL_RT286_MACH) += snd-soc-skl_rt286.o
 obj-$(CONFIG_SND_SOC_INTEL_SKL_NAU88L25_MAX98357A_MACH) += snd-skl_nau88l25_max98357a.o
 obj-$(CONFIG_SND_SOC_INTEL_SKL_NAU88L25_SSM4567_MACH) += snd-soc-skl_nau88l25_ssm4567.o
+obj-$(CONFIG_SND_SOC_INTEL_CNL_RT274_MACH) += snd-soc-cnl-rt274.o
diff --git a/sound/soc/intel/boards/cnl_rt274.c b/sound/soc/intel/boards/cnl_rt274.c
new file mode 100644
index 000000000000..db271ecd3370
--- /dev/null
+++ b/sound/soc/intel/boards/cnl_rt274.c
@@ -0,0 +1,250 @@
+/*
+ *  cnl_rt274.c - ASOC Machine driver for CNL
+ *
+ *  Copyright (C) 2016-17 Intel Corp
+ *  Author: Guneshwor Singh <guneshwor.o.singh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  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; version 2 of the License.
+ *
+ *  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.
+ *
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/module.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include "../../codecs/rt274.h"
+
+#define CNL_FREQ_OUT		19200000
+#define CNL_BE_FIXUP_RATE	48000
+#define RT274_CODEC_DAI		"rt274-aif1"
+
+static int cnl_rt274_clock_control(struct snd_soc_dapm_widget *w,
+				   struct snd_kcontrol *k, int event)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = dapm->card;
+	struct snd_soc_dai *codec_dai =
+		snd_soc_card_get_codec_dai(card, RT274_CODEC_DAI);
+	int ret, ratio = 100;
+
+	if (!codec_dai)
+		return -EINVAL;
+
+	/* Codec needs clock for Jack detection and button press */
+	ret = snd_soc_dai_set_sysclk(codec_dai, RT274_SCLK_S_PLL2,
+				     CNL_FREQ_OUT, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(codec_dai->dev, "set codec sysclk failed: %d\n", ret);
+		return ret;
+	}
+
+	if (SND_SOC_DAPM_EVENT_ON(event)) {
+		ret = snd_soc_dai_set_bclk_ratio(codec_dai, ratio);
+		if (ret) {
+			dev_err(codec_dai->dev,
+				"set bclk ratio failed: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_pll(codec_dai, 0, RT274_PLL2_S_BCLK,
+					  CNL_BE_FIXUP_RATE * ratio,
+					  CNL_FREQ_OUT);
+		if (ret) {
+			dev_err(codec_dai->dev,
+				"enable PLL2 failed: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static struct snd_soc_jack cnl_headset;
+
+/* Headset jack detection DAPM pins */
+static struct snd_soc_jack_pin cnl_headset_pins[] = {
+	{
+		.pin = "Mic Jack",
+		.mask = SND_JACK_MICROPHONE,
+	},
+	{
+		.pin = "Headphone Jack",
+		.mask = SND_JACK_HEADPHONE,
+	},
+};
+
+static const struct snd_kcontrol_new cnl_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
+	SOC_DAPM_PIN_SWITCH("Mic Jack"),
+};
+
+static const struct snd_soc_dapm_widget cnl_rt274_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack", NULL),
+	SND_SOC_DAPM_MIC("Mic Jack", NULL),
+	SND_SOC_DAPM_MIC("SoC DMIC", NULL),
+	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
+			    cnl_rt274_clock_control,
+			    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+};
+
+static int cnl_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
+			  struct snd_pcm_hw_params *params)
+{
+	struct snd_interval *channels =
+		hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	if (params_channels(params) == 2)
+		channels->min = channels->max = 2;
+	else
+		channels->min = channels->max = 4;
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_route cnl_map[] = {
+	{"Headphone Jack", NULL, "HPO Pin"},
+	{"MIC", NULL, "Mic Jack"},
+	{"DMic", NULL, "SoC DMIC"},
+	{"DMIC01 Rx", NULL, "Capture"},
+	{"dmic01_hifi", NULL, "DMIC01 Rx"},
+
+	{"AIF1 Playback", NULL, "ssp0 Tx"},
+	{"ssp0 Tx", NULL, "codec1_out"},
+	{"ssp0 Tx", NULL, "codec0_out"},
+
+	{"ssp0 Rx", NULL, "AIF1 Capture"},
+	{"codec0_in", NULL, "ssp0 Rx"},
+
+	{"Headphone Jack", NULL, "Platform Clock"},
+	{"Mic Jack", NULL, "Platform Clock"},
+};
+
+static int cnl_rt274_init(struct snd_soc_pcm_runtime *runtime)
+{
+	struct snd_soc_codec *codec = runtime->codec;
+	struct snd_soc_card *card = runtime->card;
+	struct snd_soc_dai *codec_dai = runtime->codec_dai;
+	int ret;
+
+	ret = snd_soc_card_jack_new(runtime->card, "Headset",
+		SND_JACK_HEADSET, &cnl_headset,
+		cnl_headset_pins, ARRAY_SIZE(cnl_headset_pins));
+	if (ret)
+		return ret;
+
+	ret = snd_soc_codec_set_jack(codec, &cnl_headset, NULL);
+	if (ret)
+		return ret;
+
+	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
+	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xf, 0xf, 4, 24);
+	if (ret < 0) {
+		dev_err(runtime->dev, "can't set codec pcm format %d\n", ret);
+		return ret;
+	}
+
+	card->dapm.idle_bias_off = true;
+
+	return 0;
+}
+
+static int cnl_be_fixup(struct snd_soc_pcm_runtime *rtd,
+			    struct snd_pcm_hw_params *params)
+{
+	struct snd_interval *rate =
+		hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *channels =
+		hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	rate->min = rate->max = CNL_BE_FIXUP_RATE;
+	channels->min = channels->max = 2;
+	snd_mask_none(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT));
+	snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
+		     SNDRV_PCM_FORMAT_S24_LE);
+
+	return 0;
+}
+
+static struct snd_soc_dai_link cnl_rt274_dailink[] = {
+	{
+		.name = "SSP0-Codec",
+		.cpu_dai_name = "SSP0 Pin",
+		.codec_name = "i2c-INT34C2:00",
+		.codec_dai_name = "rt274-aif1",
+		.platform_name = "0000:00:1f.3",
+		.be_hw_params_fixup = cnl_be_fixup,
+		.no_pcm = 1,
+		.ignore_pmdown_time = 1,
+		.dai_fmt = SND_SOC_DAIFMT_DSP_A |
+			SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+		.init = cnl_rt274_init,
+	},
+	{
+		.name = "dmic01",
+		.cpu_dai_name = "DMIC01 Pin",
+		.codec_name = "dmic-codec",
+		.codec_dai_name = "dmic-hifi",
+		.platform_name = "0000:00:1f.3",
+		.be_hw_params_fixup = cnl_dmic_fixup,
+		.no_pcm = 1,
+		.ignore_suspend = 1,
+		.dpcm_capture = 1,
+	},
+};
+
+static int
+cnl_add_dai_link(struct snd_soc_card *card, struct snd_soc_dai_link *link)
+{
+	link->platform_name = "0000:00:1f.3";
+	link->nonatomic = 1;
+
+	return 0;
+}
+
+/* SoC card */
+static struct snd_soc_card snd_soc_card_cnl = {
+	.name = "cnl-audio",
+	.dai_link = cnl_rt274_dailink,
+	.num_links = ARRAY_SIZE(cnl_rt274_dailink),
+	.dapm_widgets = cnl_rt274_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(cnl_rt274_widgets),
+	.dapm_routes = cnl_map,
+	.num_dapm_routes = ARRAY_SIZE(cnl_map),
+	.controls = cnl_controls,
+	.num_controls = ARRAY_SIZE(cnl_controls),
+	.add_dai_link = cnl_add_dai_link,
+	.fully_routed = true,
+};
+
+static int snd_cnl_rt274_probe(struct platform_device *pdev)
+{
+	snd_soc_card_cnl.dev = &pdev->dev;
+
+	return devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cnl);
+}
+
+static struct platform_driver snd_cnl_rt274_driver = {
+	.driver = {
+		.name = "cnl_rt274",
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = snd_cnl_rt274_probe,
+};
+
+module_platform_driver(snd_cnl_rt274_driver);
+
+MODULE_AUTHOR("Guneshwor Singh <guneshwor.o.singh@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:cnl_rt274");
-- 
2.15.0