[PATCH 2/4] ASoC: Intel: Boards: Add KeemBay machine driver

[Sia Jee Heng]

Add KeemBay machine driver which glues the tlv320aic3204 codec driver
and kmb_platform driver to form the asoc sound driver.

Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit at intel.com>
Signed-off-by: Sia Jee Heng <jee.heng.sia at intel.com>
---
 sound/soc/intel/boards/kmb_tlv3204.c | 144 +++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 sound/soc/intel/boards/kmb_tlv3204.c

diff --git a/sound/soc/intel/boards/kmb_tlv3204.c b/sound/soc/intel/boards/kmb_tlv3204.c
new file mode 100644
index 0000000..813c291
--- /dev/null
+++ b/sound/soc/intel/boards/kmb_tlv3204.c
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*  KeemBay ASOC Machine driver
+ *
+ *  Copyright (C) 2020 Intel Corporation.
+ *
+ */
+
+#include <linux/module.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/soc.h>
+#include "../../codecs/tlv320aic32x4.h"
+
+static unsigned int channels[] = {
+	2,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_ch = {
+	.count	= ARRAY_SIZE(channels),
+	.list	= channels,
+};
+
+static unsigned int rates[] = {
+	16000,
+	48000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_rates = {
+	.count	= ARRAY_SIZE(rates),
+	.list	= rates,
+};
+
+static int kmb_mach_hw_params(struct snd_pcm_substream *substream,
+			      struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+	int ret;
+	unsigned int sysclk;
+
+	/* As per codec datasheet Sysclk = 256 * fs */
+	sysclk = 12288000;
+
+	/* set the codec system clock */
+	ret = snd_soc_dai_set_sysclk(codec_dai, 1, sysclk, SND_SOC_CLOCK_IN);
+	if (ret < 0)
+		dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
+
+	return ret;
+}
+
+static int kmb_mach_dai_link_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *str_runtime;
+
+	str_runtime = substream->runtime;
+
+	snd_pcm_hw_constraint_list(str_runtime, 0,
+				   SNDRV_PCM_HW_PARAM_CHANNELS,
+				   &constraints_ch);
+
+	snd_pcm_hw_constraint_list(str_runtime, 0,
+				   SNDRV_PCM_HW_PARAM_RATE,
+				   &constraints_rates);
+
+	return 0;
+}
+
+static const struct snd_soc_ops kmb_mach_dai_link_ops = {
+	.startup = kmb_mach_dai_link_startup,
+	.hw_params = kmb_mach_hw_params,
+};
+
+static const struct snd_soc_dapm_widget aic32x4_dapm_widgets[] = {
+	SND_SOC_DAPM_MIC("External Mic", NULL),
+	SND_SOC_DAPM_HP("Headphone", NULL),
+};
+
+static const struct snd_soc_dapm_route aic32x4_dapm_routes[] = {
+	{"Headphone", NULL, "HPL"},
+	{"Headphone", NULL, "HPR"},
+	{"IN3_R", NULL, "External Mic"},
+	{"IN3_L", NULL, "External Mic"},
+};
+
+/* Linking platform to the codec-drivers  */
+SND_SOC_DAILINK_DEFS(link1,
+	DAILINK_COMP_ARRAY(COMP_CPU("20140000.i2s")),
+	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic32x4.2-0018",
+					"tlv320aic32x4-hifi")),
+	DAILINK_COMP_ARRAY(COMP_PLATFORM("20140000.i2s")));
+
+/* kmb digital audio interface glue */
+static struct snd_soc_dai_link kmb_mach_dais[] = {
+	{
+		.name		= "tlv320aic32x4",
+		.stream_name	= "TLV320AIC32X4",
+		.ops = &kmb_mach_dai_link_ops,
+		.dai_fmt = SND_SOC_DAIFMT_I2S |
+				SND_SOC_DAIFMT_NB_NF |
+				SND_SOC_DAIFMT_CBS_CFS,
+		SND_SOC_DAILINK_REG(link1),
+	},
+};
+
+/* kmb audio machine driver */
+static struct snd_soc_card kmb_mach = {
+	.name = "kmb_audio_card",
+	.dai_link = kmb_mach_dais,
+	.num_links = ARRAY_SIZE(kmb_mach_dais),
+	.dapm_routes = aic32x4_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(aic32x4_dapm_routes),
+	.dapm_widgets = aic32x4_dapm_widgets,
+	.num_dapm_widgets =  ARRAY_SIZE(aic32x4_dapm_widgets),
+	.fully_routed = true,
+};
+
+static int kmb_mach_audio_probe(struct platform_device *pdev)
+{
+	kmb_mach.dev = &pdev->dev;
+
+	return devm_snd_soc_register_card(&pdev->dev, &kmb_mach);
+}
+
+static const struct of_device_id kmb_mach_of_match[] = {
+	{ .compatible = "intel,kmb-snd-asoc", },
+	{}
+};
+
+static struct platform_driver kmb_mach_audio = {
+	.probe = kmb_mach_audio_probe,
+	.driver = {
+		.name = "kmb_tlv3204",
+		.of_match_table = kmb_mach_of_match,
+	},
+};
+
+module_platform_driver(kmb_mach_audio)
+
+/* Module information */
+MODULE_DESCRIPTION("Intel Audio tlv3204 machine driver for KeemBay");
+MODULE_AUTHOR("Sia Jee Heng <jee.heng.sia at intel.com>");
+MODULE_AUTHOR("Sit, Michael Wei Hong <michael.wei.hong.sit at intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:kmb_tlv3204");
-- 
1.9.1