ASoC: fsl: Add machine driver for i2s xtor

Add I2S XTOR machine driver.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>

4 files changed, 363 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/imx-audio-xtor.txt b/Documentation/devicetree/bindings/sound/imx-audio-xtor.txt
new file mode 100644
index 000000000000..ed55891bca96
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/imx-audio-xtor.txt
@@ -0,0 +1,30 @@
+Freescale i.MX audio complex with Freescale DAI transceiver.
+Currently supports Freescale SAI or ESAI digital audio interface.
+
+Required properties:
+
+  - compatible		: "fsl,imx-audio-xtor"
+
+  - model		: The user-visible name of this sound complex
+
+  - cpu-dai		: The phandle of the i.MX DAI, currently supports
+			  SAI or ESAI controller
+
+Optional properties:
+
+  - asrc-controller	: The phandle of the i.MX ASRC controller associated with DAI.
+
+Examples:
+
+sound-xtor-sai {
+	compatible = "fsl,imx-audio-xtor";
+	model = "xtor-audio-sai";
+	cpu-dai = <&sai0>;
+	asrc-controller = <&asrc0>;
+};
+
+sound-xtor-esai {
+	compatible = "fsl,imx-audio-xtor";
+	model = "xtor-audio-esai";
+	cpu-dai = <&esai0>;
+};
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 5423cc1939d4..1ec8c55e7f79 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -353,6 +353,17 @@ config SND_SOC_IMX_ES8328
 	  Say Y if you want to add support for the ES8328 audio codec connected
 	  via SSI/I2S over either SPI or I2C.
 
+config SND_SOC_IMX_XTOR
+	tristate "SoC Audio support for i.MX boards with xtor codec"
+	select SND_SOC_IMX_PCM_DMA
+	select SND_SOC_FSL_ESAI
+	select SND_SOC_FSL_SAI
+	select SND_SOC_FSL_UTILS
+	help
+	  SoC Audio support for i.MX boards with xtor codec
+	  Say Y if you want to add support for SoC audio on
+	  an i.MX board with a xtor codec.
+
 config SND_SOC_IMX_SGTL5000
 	tristate "SoC Audio support for i.MX boards with sgtl5000"
 	depends on OF && I2C
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 687ed7d1edcd..0d6c5edb792e 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -66,6 +66,7 @@ snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
 snd-soc-imx-wm8958-objs := imx-wm8958.o
 snd-soc-imx-wm8960-objs := imx-wm8960.o
 snd-soc-imx-wm8962-objs := imx-wm8962.o
+snd-soc-imx-xtor-objs := imx-xtor.o
 snd-soc-imx-sii902x-objs := imx-sii902x.o
 snd-soc-imx-spdif-objs := imx-spdif.o
 snd-soc-imx-mc13783-objs := imx-mc13783.o
@@ -84,6 +85,7 @@ obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
 obj-${CONFIG_SND_SOC_IMX_WM8958} += snd-soc-imx-wm8958.o
 obj-$(CONFIG_SND_SOC_IMX_WM8960) += snd-soc-imx-wm8960.o
 obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
+obj-$(CONFIG_SND_SOC_IMX_XTOR) += snd-soc-imx-xtor.o
 obj-$(CONFIG_SND_SOC_IMX_RPMSG) += snd-soc-imx-rpmsg.o
 obj-$(CONFIG_SND_SOC_IMX_SII902X) += snd-soc-imx-sii902x.o
 obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
diff --git a/sound/soc/fsl/imx-xtor.c b/sound/soc/fsl/imx-xtor.c
new file mode 100644
index 000000000000..0d6f92d0285d
--- /dev/null
+++ b/sound/soc/fsl/imx-xtor.c
@@ -0,0 +1,320 @@
+/*
+ * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
+ * Copyright 2017 NXP
+ *
+ * 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 <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/pinctrl/consumer.h>
+#include "fsl_sai.h"
+#include "fsl_esai.h"
+
+#define RX 0
+#define TX 1
+
+/**
+ * CPU private data
+ *
+ * @sysclk_id[2]: SYSCLK ids for set_sysclk()
+ * @slots: number of slots supported by DAI
+ *
+ * Note: [0] for rx and [1] for tx
+ */
+struct cpu_priv {
+	u32 sysclk_id[2];
+	u32 slots;
+};
+
+struct imx_xtor_data {
+	struct snd_soc_dai_link dai[3];
+	struct snd_soc_card card;
+	struct cpu_priv cpu_priv;
+	bool  is_stream_opened[2];
+	struct platform_device *asrc_pdev;
+	u32 asrc_rate;
+	u32 asrc_format;
+};
+
+static int imx_xtor_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	static struct snd_pcm_hw_constraint_list constraint_rates;
+	int ret;
+	static u32 support_rates[] = { 8000, 32000, 48000, 96000, 192000, };
+
+	constraint_rates.list = support_rates;
+	constraint_rates.count = ARRAY_SIZE(support_rates);
+
+	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+						&constraint_rates);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int imx_xtor_hw_params(struct snd_pcm_substream *substream,
+				     struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct imx_xtor_data *data = snd_soc_card_get_drvdata(rtd->card);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	struct cpu_priv *cpu_priv = &data->cpu_priv;
+	struct device *dev = rtd->card->dev;
+	unsigned int fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
+	int ret, dir;
+	u32 freq;
+
+	/* For playback the XTOR is slave, and for record is master */
+	fmt |= tx ? SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBM_CFM;
+	dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(rtd->cpu_dai, fmt);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	/* Specific configurations of DAIs starts from here */
+	freq = params_rate(params) * params_width(params) * cpu_priv->slots;
+	ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, cpu_priv->sysclk_id[tx],
+				     freq, dir);
+	if (ret) {
+		dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, cpu_priv->slots,
+					params_width(params));
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int imx_xtor_hw_free(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static void imx_xtor_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_card *card = rtd->card;
+	struct imx_xtor_data *data = snd_soc_card_get_drvdata(card);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+
+	data->is_stream_opened[tx] = false;
+}
+
+static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_card *card = rtd->card;
+	struct imx_xtor_data *data = snd_soc_card_get_drvdata(card);
+	struct snd_interval *rate;
+	struct snd_mask *mask;
+
+	if (!data->asrc_pdev)
+		return -EINVAL;
+
+	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	rate->max = rate->min = data->asrc_rate;
+
+	mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	snd_mask_none(mask);
+	snd_mask_set(mask, data->asrc_format);
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	/* Line out jack */
+	{"CPU-Playback",  NULL, "ASRC-Playback"},
+	{"Playback",  NULL, "CPU-Playback"},/* dai route for be and fe */
+	{"ASRC-Capture",  NULL, "CPU-Capture"},
+	{"CPU-Capture",  NULL, "Capture"},
+};
+
+
+static struct snd_soc_ops imx_xtor_ops = {
+	.startup = imx_xtor_startup,
+	.shutdown  = imx_xtor_shutdown,
+	.hw_params = imx_xtor_hw_params,
+	.hw_free = imx_xtor_hw_free,
+};
+
+static struct snd_soc_ops imx_xtor_be_ops = {
+	.hw_params = imx_xtor_hw_params,
+	.hw_free = imx_xtor_hw_free,
+};
+
+static int imx_xtor_probe(struct platform_device *pdev)
+{
+	struct device_node *cpu_np, *xtor_np = NULL;
+	struct device_node *asrc_np = NULL;
+	struct platform_device *asrc_pdev = NULL;
+	struct platform_device *cpu_pdev;
+	struct imx_xtor_data *data;
+	int ret;
+	u32 width;
+
+	cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	asrc_np = of_parse_phandle(pdev->dev.of_node, "asrc-controller", 0);
+	if (asrc_np) {
+		asrc_pdev = of_find_device_by_node(asrc_np);
+		data->asrc_pdev = asrc_pdev;
+	}
+
+	cpu_pdev = of_find_device_by_node(cpu_np);
+	if (!cpu_pdev) {
+		dev_err(&pdev->dev, "failed to find SAI platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	if (strstr(cpu_np->name, "esai")) {
+		data->cpu_priv.sysclk_id[TX] = ESAI_HCKT_EXTAL;
+		data->cpu_priv.sysclk_id[RX] = ESAI_HCKR_EXTAL;
+	} else if (strstr(cpu_np->name, "sai")) {
+		data->cpu_priv.sysclk_id[TX] = FSL_SAI_CLK_MAST1;
+		data->cpu_priv.sysclk_id[RX] = FSL_SAI_CLK_MAST1;
+	}
+	data->cpu_priv.slots = 2;
+
+	data->dai[0].name = "xtor hifi";
+	data->dai[0].stream_name = "xtor hifi";
+	data->dai[0].codec_dai_name = "snd-soc-dummy-dai";
+	data->dai[0].codec_name = "snd-soc-dummy";
+	data->dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
+	data->dai[0].platform_of_node = cpu_np;
+	data->dai[0].ops = &imx_xtor_ops;
+	data->dai[0].playback_only = false;
+	data->dai[0].capture_only = false;
+	data->card.num_links = 1;
+	data->card.dai_link = data->dai;
+
+	/*if there is no asrc controller, we only enable one device*/
+	if (asrc_pdev) {
+		data->dai[1].name = "HiFi-ASRC-FE";
+		data->dai[1].stream_name = "HiFi-ASRC-FE";
+		data->dai[1].codec_dai_name = "snd-soc-dummy-dai";
+		data->dai[1].codec_name = "snd-soc-dummy";
+		data->dai[1].cpu_of_node    = asrc_np;
+		data->dai[1].platform_of_node   = asrc_np;
+		data->dai[1].dynamic   = 1;
+		data->dai[1].dpcm_playback  = 1;
+		data->dai[1].dpcm_capture   = 1;
+
+		data->dai[2].name = "HiFi-ASRC-BE";
+		data->dai[2].stream_name = "HiFi-ASRC-BE";
+		data->dai[2].codec_dai_name  = "snd-soc-dummy-dai";
+		data->dai[2].codec_name      = "snd-soc-dummy";
+		data->dai[2].cpu_of_node     = cpu_np;
+		data->dai[2].platform_name   = "snd-soc-dummy";
+		data->dai[2].no_pcm   = 1;
+		data->dai[2].dpcm_playback  = 1;
+		data->dai[2].dpcm_capture   = 1;
+		data->dai[2].ops = &imx_xtor_be_ops,
+		data->dai[2].be_hw_params_fixup = be_hw_params_fixup,
+		data->card.num_links = 3;
+		data->card.dai_link = &data->dai[0];
+
+		ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
+						&data->asrc_rate);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get output rate\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get output rate\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		if (width == 24)
+			data->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+		else
+			data->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
+	}
+
+	data->card.dapm_routes = audio_map,
+	data->card.num_dapm_routes = ARRAY_SIZE(audio_map),
+	data->card.dev = &pdev->dev;
+	data->card.owner = THIS_MODULE;
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+
+	platform_set_drvdata(pdev, &data->card);
+	snd_soc_card_set_drvdata(&data->card, data);
+	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+		goto fail;
+	}
+
+fail:
+	if (cpu_np)
+		of_node_put(cpu_np);
+	if (xtor_np)
+		of_node_put(xtor_np);
+	return ret;
+}
+
+static const struct of_device_id imx_xtor_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-xtor", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_xtor_dt_ids);
+
+static struct platform_driver imx_xtor_driver = {
+	.driver = {
+		.name = "imx-xtor",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_xtor_dt_ids,
+	},
+	.probe = imx_xtor_probe,
+};
+module_platform_driver(imx_xtor_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX Dummy audio ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-xtor");