ASoC: Intel: cirrus-common: support cs35l41 amplifier

Implement cs35l41 support code in this common module so it could be
shared between multiple SOF machine drivers.

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220301194903.60859-7-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/Kconfig

@@ -35,6 +35,9 @@ config SND_SOC_INTEL_SOF_MAXIM_COMMON
 config SND_SOC_INTEL_SOF_REALTEK_COMMON
 	tristate
 
+config SND_SOC_INTEL_SOF_CIRRUS_COMMON
+	tristate
+
 if SND_SOC_INTEL_CATPT
 
 config SND_SOC_INTEL_HASWELL_MACH

sound/soc/intel/boards/Makefile

@@ -91,3 +91,6 @@ obj-$(CONFIG_SND_SOC_INTEL_SOF_MAXIM_COMMON) += snd-soc-intel-sof-maxim-common.o
 
 snd-soc-intel-sof-realtek-common-objs += sof_realtek_common.o
 obj-$(CONFIG_SND_SOC_INTEL_SOF_REALTEK_COMMON) += snd-soc-intel-sof-realtek-common.o
+
+snd-soc-intel-sof-cirrus-common-objs += sof_cirrus_common.o
+obj-$(CONFIG_SND_SOC_INTEL_SOF_CIRRUS_COMMON) += snd-soc-intel-sof-cirrus-common.o

sound/soc/intel/boards/sof_cirrus_common.c

@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This file defines data structures and functions used in Machine
+ * Driver for Intel platforms with Cirrus Logic Codecs.
+ *
+ * Copyright 2022 Intel Corporation.
+ */
+#include <linux/module.h>
+#include <sound/sof.h>
+#include "../../codecs/cs35l41.h"
+#include "sof_cirrus_common.h"
+
+/*
+ * Cirrus Logic CS35L41/CS35L53
+ */
+static const struct snd_kcontrol_new cs35l41_kcontrols[] = {
+	SOC_DAPM_PIN_SWITCH("WL Spk"),
+	SOC_DAPM_PIN_SWITCH("WR Spk"),
+	SOC_DAPM_PIN_SWITCH("TL Spk"),
+	SOC_DAPM_PIN_SWITCH("TR Spk"),
+};
+
+static const struct snd_soc_dapm_widget cs35l41_dapm_widgets[] = {
+	SND_SOC_DAPM_SPK("WL Spk", NULL),
+	SND_SOC_DAPM_SPK("WR Spk", NULL),
+	SND_SOC_DAPM_SPK("TL Spk", NULL),
+	SND_SOC_DAPM_SPK("TR Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route cs35l41_dapm_routes[] = {
+	/* speaker */
+	{"WL Spk", NULL, "WL SPK"},
+	{"WR Spk", NULL, "WR SPK"},
+	{"TL Spk", NULL, "TL SPK"},
+	{"TR Spk", NULL, "TR SPK"},
+};
+
+static struct snd_soc_dai_link_component cs35l41_components[] = {
+	{
+		.name = CS35L41_DEV0_NAME,
+		.dai_name = CS35L41_CODEC_DAI,
+	},
+	{
+		.name = CS35L41_DEV1_NAME,
+		.dai_name = CS35L41_CODEC_DAI,
+	},
+	{
+		.name = CS35L41_DEV2_NAME,
+		.dai_name = CS35L41_CODEC_DAI,
+	},
+	{
+		.name = CS35L41_DEV3_NAME,
+		.dai_name = CS35L41_CODEC_DAI,
+	},
+};
+
+static struct snd_soc_codec_conf cs35l41_codec_conf[] = {
+	{
+		.dlc = COMP_CODEC_CONF(CS35L41_DEV0_NAME),
+		.name_prefix = "WL",
+	},
+	{
+		.dlc = COMP_CODEC_CONF(CS35L41_DEV1_NAME),
+		.name_prefix = "WR",
+	},
+	{
+		.dlc = COMP_CODEC_CONF(CS35L41_DEV2_NAME),
+		.name_prefix = "TL",
+	},
+	{
+		.dlc = COMP_CODEC_CONF(CS35L41_DEV3_NAME),
+		.name_prefix = "TR",
+	},
+};
+
+static int cs35l41_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_card *card = rtd->card;
+	int ret;
+
+	ret = snd_soc_dapm_new_controls(&card->dapm, cs35l41_dapm_widgets,
+					ARRAY_SIZE(cs35l41_dapm_widgets));
+	if (ret) {
+		dev_err(rtd->dev, "fail to add dapm controls, ret %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_add_card_controls(card, cs35l41_kcontrols,
+					ARRAY_SIZE(cs35l41_kcontrols));
+	if (ret) {
+		dev_err(rtd->dev, "fail to add card controls, ret %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dapm_add_routes(&card->dapm, cs35l41_dapm_routes,
+				      ARRAY_SIZE(cs35l41_dapm_routes));
+
+	if (ret)
+		dev_err(rtd->dev, "fail to add dapm routes, ret %d\n", ret);
+
+	return ret;
+}
+
+static int cs35l41_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct snd_soc_dai *codec_dai;
+	int clk_freq, i, ret;
+
+	clk_freq = sof_dai_get_bclk(rtd); /* BCLK freq */
+
+	if (clk_freq <= 0) {
+		dev_err(rtd->dev, "fail to get bclk freq, ret %d\n", clk_freq);
+		return -EINVAL;
+	}
+
+	for_each_rtd_codec_dais(rtd, i, codec_dai) {
+		/* call dai driver's set_sysclk() callback */
+		ret = snd_soc_dai_set_sysclk(codec_dai, CS35L41_CLKID_SCLK,
+					     clk_freq, SND_SOC_CLOCK_IN);
+		if (ret < 0) {
+			dev_err(codec_dai->dev, "fail to set sysclk, ret %d\n",
+				ret);
+			return ret;
+		}
+
+		/* call component driver's set_sysclk() callback */
+		ret = snd_soc_component_set_sysclk(codec_dai->component,
+						   CS35L41_CLKID_SCLK, 0,
+						   clk_freq, SND_SOC_CLOCK_IN);
+		if (ret < 0) {
+			dev_err(codec_dai->dev, "fail to set component sysclk, ret %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_ops cs35l41_ops = {
+	.hw_params = cs35l41_hw_params,
+};
+
+void cs35l41_set_dai_link(struct snd_soc_dai_link *link)
+{
+	link->codecs = cs35l41_components;
+	link->num_codecs = ARRAY_SIZE(cs35l41_components);
+	link->init = cs35l41_init;
+	link->ops = &cs35l41_ops;
+}
+EXPORT_SYMBOL_NS(cs35l41_set_dai_link, SND_SOC_INTEL_SOF_CIRRUS_COMMON);
+
+void cs35l41_set_codec_conf(struct snd_soc_card *card)
+{
+	card->codec_conf = cs35l41_codec_conf;
+	card->num_configs = ARRAY_SIZE(cs35l41_codec_conf);
+}
+EXPORT_SYMBOL_NS(cs35l41_set_codec_conf, SND_SOC_INTEL_SOF_CIRRUS_COMMON);
+
+MODULE_DESCRIPTION("ASoC Intel SOF Cirrus Logic helpers");
+MODULE_LICENSE("GPL");

sound/soc/intel/boards/sof_cirrus_common.h

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * This file defines data structures used in Machine Driver for Intel
+ * platforms with Cirrus Logic Codecs.
+ *
+ * Copyright 2022 Intel Corporation.
+ */
+#ifndef __SOF_CIRRUS_COMMON_H
+#define __SOF_CIRRUS_COMMON_H
+
+#include <sound/soc.h>
+
+/*
+ * Cirrus Logic CS35L41/CS35L53
+ */
+#define CS35L41_CODEC_DAI	"cs35l41-pcm"
+#define CS35L41_DEV0_NAME	"i2c-CSC3541:00"
+#define CS35L41_DEV1_NAME	"i2c-CSC3541:01"
+#define CS35L41_DEV2_NAME	"i2c-CSC3541:02"
+#define CS35L41_DEV3_NAME	"i2c-CSC3541:03"
+
+void cs35l41_set_dai_link(struct snd_soc_dai_link *link);
+void cs35l41_set_codec_conf(struct snd_soc_card *card);
+
+#endif /* __SOF_CIRRUS_COMMON_H */