MLK-11429-21: ASoC: fsl: port si476x machine driver from imx_3.10.y

cherry-pick below patch from imx_3.14.y
ENGR00330403-3: ASoC: fsl: port si476x machine driver from imx_3.10.y

Port si476x machine dirver for i.MX series SoC and binding doc from imx_3.10.y

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>

Documentation/devicetree/bindings/sound/imx-audio-si476x.txt

@@ -0,0 +1,24 @@
+Freescale i.MX audio complex with si476x codec
+
+Required properties:
+- compatible : "fsl,imx-audio-si476x"
+- model : The user-visible name of this sound complex
+- ssi-controller : The phandle of the i.MX SSI controller
+
+- mux-int-port : The internal port of the i.MX audio muxer (AUDMUX)
+- mux-ext-port : The external port of the i.MX audio muxer
+
+Note: The AUDMUX port numbering should start at 1, which is consistent with
+hardware manual.
+
+Example:
+
+sound {
+	compatible = "fsl,imx-audio-si476x",
+		     "fsl,imx-tuner-si476x";
+	model = "imx-radio-si476x";
+
+	ssi-controller = <&ssi1>;
+	mux-int-port = <2>;
+	mux-ext-port = <5>;
+};

sound/soc/fsl/Kconfig

@@ -314,6 +314,18 @@ config SND_SOC_IMX_AUDMIX
 	  Say Y if you want to add support for SoC audio on an i.MX board with
 	  an Audio Mixer.
 
+config SND_SOC_IMX_SI476X
+	tristate "SoC Audio support for i.MX boards with si476x"
+	select SND_SOC_IMX_PCM_DMA
+	select SND_SOC_IMX_AUDMUX
+	select SND_SOC_FSL_SSI
+	select SND_SOC_FSL_UTILS
+	select SND_SOC_SI476X
+	help
+	  SoC Audio support for i.MX boards with SI476x
+	  Say Y if you want to add support for Soc audio for the AMFM Tuner chip
+	  SI476x module.
+
 endif # SND_IMX_SOC
 
 endmenu

sound/soc/fsl/Makefile

@@ -63,6 +63,7 @@ snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
 snd-soc-imx-spdif-objs := imx-spdif.o
 snd-soc-imx-mc13783-objs := imx-mc13783.o
 snd-soc-imx-audmix-objs := imx-audmix.o
+snd-soc-imx-si476x-objs := imx-si476x.o
 
 obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
 obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o
@@ -73,3 +74,4 @@ obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
 obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
 obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
 obj-$(CONFIG_SND_SOC_IMX_AUDMIX) += snd-soc-imx-audmix.o
+obj-$(CONFIG_SND_SOC_IMX_SI476X) += snd-soc-imx-si476x.o

sound/soc/fsl/imx-si476x.c

@@ -0,0 +1,194 @@
+/*
+ * Copyright (C) 2008-2016 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <sound/soc.h>
+
+#include "imx-audmux.h"
+
+static int imx_audmux_config(int slave, int master)
+{
+	unsigned int ptcr, pdcr;
+	slave = slave - 1;
+	master = master - 1;
+
+	ptcr = IMX_AUDMUX_V2_PTCR_SYN |
+		IMX_AUDMUX_V2_PTCR_TFSDIR |
+		IMX_AUDMUX_V2_PTCR_TFSEL(slave) |
+		IMX_AUDMUX_V2_PTCR_TCLKDIR |
+		IMX_AUDMUX_V2_PTCR_TCSEL(slave);
+	pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(slave);
+	imx_audmux_v2_configure_port(master, ptcr, pdcr);
+
+	/*
+	 * According to RM, RCLKDIR and SYN should not be changed at same time.
+	 * So separate to two step for configuring this port.
+	 */
+	ptcr |= IMX_AUDMUX_V2_PTCR_RFSDIR |
+		IMX_AUDMUX_V2_PTCR_RFSEL(slave) |
+		IMX_AUDMUX_V2_PTCR_RCLKDIR |
+		IMX_AUDMUX_V2_PTCR_RCSEL(slave);
+	imx_audmux_v2_configure_port(master, ptcr, pdcr);
+
+	ptcr = IMX_AUDMUX_V2_PTCR_SYN;
+	pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(master);
+	imx_audmux_v2_configure_port(slave, ptcr, pdcr);
+
+	return 0;
+}
+
+static int imx_si476x_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 *cpu_dai = rtd->cpu_dai;
+	int ret = 0;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
+			| SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
+	if (ret) {
+		dev_err(cpu_dai->dev, "failed to set dai fmt\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static struct snd_soc_ops imx_si476x_ops = {
+	.hw_params = imx_si476x_hw_params,
+};
+
+SND_SOC_DAILINK_DEFS(hifi,
+	DAILINK_COMP_ARRAY(COMP_EMPTY()),
+	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "si476x-codec")),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link imx_dai = {
+	.name = "imx-si476x",
+	.stream_name = "imx-si476x",
+	.ops = &imx_si476x_ops,
+	SND_SOC_DAILINK_REG(hifi),
+};
+
+static struct snd_soc_card snd_soc_card_imx_3stack = {
+	.name = "imx-audio-si476x",
+	.dai_link = &imx_dai,
+	.num_links = 1,
+	.owner = THIS_MODULE,
+};
+
+static int imx_si476x_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &snd_soc_card_imx_3stack;
+	struct device_node *ssi_np, *np = pdev->dev.of_node;
+	struct platform_device *ssi_pdev;
+	struct i2c_client *fm_dev;
+	struct device_node *fm_np = NULL;
+	int int_port, ext_port, ret;
+
+	ret = of_property_read_u32(np, "mux-int-port", &int_port);
+	if (ret) {
+		dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
+		return ret;
+	}
+
+	ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
+	if (ret) {
+		dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
+		return ret;
+	}
+
+	imx_audmux_config(int_port, ext_port);
+
+	ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
+	if (!ssi_np) {
+		dev_err(&pdev->dev, "phandle missing or invalid\n");
+		return -EINVAL;
+	}
+
+	ssi_pdev = of_find_device_by_node(ssi_np);
+	if (!ssi_pdev) {
+		dev_err(&pdev->dev, "failed to find SSI platform device\n");
+		ret = -EINVAL;
+		goto end;
+	}
+
+	fm_np = of_parse_phandle(pdev->dev.of_node, "fm-controller", 0);
+	if (!fm_np) {
+		dev_err(&pdev->dev, "phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto end;
+	}
+
+	fm_dev = of_find_i2c_device_by_node(fm_np->parent);
+	if (!fm_dev || !fm_dev->dev.driver) {
+		dev_err(&pdev->dev, "failed to find FM platform device\n");
+		ret = -EINVAL;
+		goto end;
+	}
+
+	card->dev = &pdev->dev;
+	card->dai_link->cpus->dai_name = dev_name(&ssi_pdev->dev);
+	card->dai_link->platforms->of_node = ssi_np;
+	card->dai_link->codecs->of_node = fm_np;
+
+	platform_set_drvdata(pdev, card);
+
+	ret = snd_soc_register_card(card);
+	if (ret)
+		dev_err(&pdev->dev, "Failed to register card: %d\n", ret);
+
+end:
+	if (ssi_np)
+		of_node_put(ssi_np);
+	if (fm_np)
+		of_node_put(fm_np);
+
+	return ret;
+}
+
+static int imx_si476x_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &snd_soc_card_imx_3stack;
+
+	snd_soc_unregister_card(card);
+
+	return 0;
+}
+
+static const struct of_device_id imx_si476x_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-si476x", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_si476x_dt_ids);
+
+static struct platform_driver imx_si476x_driver = {
+	.driver = {
+		.name = "imx-tuner-si476x",
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_si476x_dt_ids,
+	},
+	.probe = imx_si476x_probe,
+	.remove = imx_si476x_remove,
+};
+
+module_platform_driver(imx_si476x_driver);
+
+/* Module information */
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("ALSA SoC i.MX si476x");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-tuner-si476x");