MLK-11429-21: ASoC: imx-cs42888: port cs42888 machine driver from imx_3.10.y

cherry-pick below patch from imx_3.14.y
ENGR00330403-1: ASoC: imx-cs42888: port cs42888 machine driver from imx_3.10.y

Port the cs42888 machine driver from imx_3.10.y and do update according to
new esai driver and asrc driver.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
(cherry picked from commit 7ed3aac83630a38eb397ed92f815a28e07198748)

1 files changed, 332 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-cs42888.c b/sound/soc/fsl/imx-cs42888.c
new file mode 100644
index 000000000000..68eaaaa9cfcd
--- /dev/null
+++ b/sound/soc/fsl/imx-cs42888.c
@@ -0,0 +1,332 @@
+/*
+ * Copyright (C) 2010-2015 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.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/pcm_params.h>
+
+#include "fsl_esai.h"
+
+#define CODEC_CLK_EXTER_OSC   1
+#define CODEC_CLK_ESAI_HCKT   2
+#define SUPPORT_RATE_NUM    10
+
+struct imx_priv {
+	unsigned int mclk_freq;
+	struct platform_device *pdev;
+	struct platform_device *asrc_pdev;
+	u32 asrc_rate;
+	u32 asrc_format;
+};
+
+static struct imx_priv card_priv;
+
+static int imx_cs42888_surround_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;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct imx_priv *priv = &card_priv;
+	u32 dai_format = 0;
+
+	dai_format = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF |
+		     SND_SOC_DAIFMT_CBS_CFS;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		snd_soc_dai_set_sysclk(cpu_dai, ESAI_HCKT_EXTAL,
+			       priv->mclk_freq, SND_SOC_CLOCK_OUT);
+	else
+		snd_soc_dai_set_sysclk(cpu_dai, ESAI_HCKR_EXTAL,
+			       priv->mclk_freq, SND_SOC_CLOCK_OUT);
+	snd_soc_dai_set_sysclk(codec_dai, 0, priv->mclk_freq, SND_SOC_CLOCK_IN);
+
+	/* set cpu DAI configuration */
+	snd_soc_dai_set_fmt(cpu_dai, dai_format);
+	/* set i.MX active slot mask */
+	snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 0x3, 2, 32);
+
+	/* set codec DAI configuration */
+	snd_soc_dai_set_fmt(codec_dai, dai_format);
+	return 0;
+}
+
+static int imx_cs42888_surround_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	static struct snd_pcm_hw_constraint_list constraint_rates;
+	struct imx_priv *priv = &card_priv;
+	struct device *dev = &priv->pdev->dev;
+	static u32 support_rates[SUPPORT_RATE_NUM];
+	int ret;
+
+	if (priv->mclk_freq == 24576000) {
+		support_rates[0] = 48000;
+		support_rates[1] = 96000;
+		support_rates[2] = 192000;
+		constraint_rates.list = support_rates;
+		constraint_rates.count = 3;
+
+		ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+							&constraint_rates);
+		if (ret)
+			return ret;
+	} else
+		dev_warn(dev, "mclk may be not supported %d\n", priv->mclk_freq);
+
+	return 0;
+}
+
+static struct snd_soc_ops imx_cs42888_surround_ops = {
+	.startup = imx_cs42888_surround_startup,
+	.hw_params = imx_cs42888_surround_hw_params,
+};
+
+/**
+ * imx_cs42888_surround_startup() is to set constrain for hw parameter, but
+ * backend use same runtime as frontend, for p2p backend need to use different
+ * parameter, so backend can't use the startup.
+ */
+static struct snd_soc_ops imx_cs42888_surround_ops_be = {
+	.hw_params = imx_cs42888_surround_hw_params,
+};
+
+
+static const struct snd_soc_dapm_widget imx_cs42888_dapm_widgets[] = {
+	SND_SOC_DAPM_LINE("Line Out Jack", NULL),
+	SND_SOC_DAPM_LINE("Line In Jack", NULL),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	/* Line out jack */
+	{"Line Out Jack", NULL, "AOUT1L"},
+	{"Line Out Jack", NULL, "AOUT1R"},
+	{"Line Out Jack", NULL, "AOUT2L"},
+	{"Line Out Jack", NULL, "AOUT2R"},
+	{"Line Out Jack", NULL, "AOUT3L"},
+	{"Line Out Jack", NULL, "AOUT3R"},
+	{"Line Out Jack", NULL, "AOUT4L"},
+	{"Line Out Jack", NULL, "AOUT4R"},
+	{"AIN1L", NULL, "Line In Jack"},
+	{"AIN1R", NULL, "Line In Jack"},
+	{"AIN2L", NULL, "Line In Jack"},
+	{"AIN2R", NULL, "Line In 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 int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				struct snd_pcm_hw_params *params) {
+
+	struct imx_priv *priv = &card_priv;
+	struct snd_interval *rate;
+	struct snd_mask *mask;
+
+	if (!priv->asrc_pdev)
+		return -EINVAL;
+
+	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	rate->max = rate->min = priv->asrc_rate;
+
+	mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	snd_mask_none(mask);
+	snd_mask_set(mask, priv->asrc_format);
+
+	return 0;
+}
+
+static struct snd_soc_dai_link imx_cs42888_dai[] = {
+	{
+		.name = "HiFi",
+		.stream_name = "HiFi",
+		.codec_dai_name = "cs42888",
+		.ops = &imx_cs42888_surround_ops,
+		.ignore_pmdown_time = 1,
+	},
+	{
+		.name = "HiFi-ASRC-FE",
+		.stream_name = "HiFi-ASRC-FE",
+		.codec_name = "snd-soc-dummy",
+		.codec_dai_name = "snd-soc-dummy-dai",
+		.dynamic = 1,
+		.ignore_pmdown_time = 1,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+	},
+	{
+		.name = "HiFi-ASRC-BE",
+		.stream_name = "HiFi-ASRC-BE",
+		.codec_dai_name = "cs42888",
+		.platform_name = "snd-soc-dummy",
+		.no_pcm = 1,
+		.ignore_pmdown_time = 1,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+		.ops = &imx_cs42888_surround_ops_be,
+		.be_hw_params_fixup = be_hw_params_fixup,
+	},
+};
+
+static struct snd_soc_card snd_soc_card_imx_cs42888 = {
+	.name = "cs42888-audio",
+	.dai_link = imx_cs42888_dai,
+	.dapm_widgets = imx_cs42888_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(imx_cs42888_dapm_widgets),
+	.dapm_routes = audio_map,
+	.num_dapm_routes = ARRAY_SIZE(audio_map),
+};
+
+/*
+ * This function will register the snd_soc_pcm_link drivers.
+ */
+static int imx_cs42888_probe(struct platform_device *pdev)
+{
+	struct device_node *esai_np, *codec_np;
+	struct device_node *asrc_np;
+	struct platform_device *esai_pdev;
+	struct platform_device *asrc_pdev = NULL;
+	struct i2c_client *codec_dev;
+	struct imx_priv *priv = &card_priv;
+	struct clk *codec_clk = NULL;
+	int ret;
+	u32 width;
+
+	priv->pdev = pdev;
+	priv->asrc_pdev = NULL;
+
+	esai_np = of_parse_phandle(pdev->dev.of_node, "esai-controller", 0);
+	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
+	if (!esai_np || !codec_np) {
+		dev_err(&pdev->dev, "phandle missing or invalid\n");
+		ret = -EINVAL;
+		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);
+		priv->asrc_pdev = asrc_pdev;
+	}
+
+	esai_pdev = of_find_device_by_node(esai_np);
+	if (!esai_pdev) {
+		dev_err(&pdev->dev, "failed to find ESAI platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+	codec_dev = of_find_i2c_device_by_node(codec_np);
+	if (!codec_dev) {
+		dev_err(&pdev->dev, "failed to find codec platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	/*if there is no asrc controller, we only enable one device*/
+	if (!asrc_pdev) {
+		imx_cs42888_dai[0].codec_of_node   = codec_np;
+		imx_cs42888_dai[0].cpu_dai_name    = dev_name(&esai_pdev->dev);
+		imx_cs42888_dai[0].platform_of_node = esai_np;
+		snd_soc_card_imx_cs42888.num_links = 1;
+	} else {
+		imx_cs42888_dai[0].codec_of_node   = codec_np;
+		imx_cs42888_dai[0].cpu_dai_name    = dev_name(&esai_pdev->dev);
+		imx_cs42888_dai[0].platform_of_node = esai_np;
+		imx_cs42888_dai[1].cpu_of_node    = asrc_np;
+		imx_cs42888_dai[1].platform_of_node   = asrc_np;
+		imx_cs42888_dai[2].codec_of_node   = codec_np;
+		imx_cs42888_dai[2].cpu_dai_name    = dev_name(&esai_pdev->dev);
+		snd_soc_card_imx_cs42888.num_links = 3;
+
+		ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
+						&priv->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)
+			priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+		else
+			priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
+	}
+
+	codec_clk = devm_clk_get(&codec_dev->dev, NULL);
+	if (IS_ERR(codec_clk)) {
+		ret = PTR_ERR(codec_clk);
+		dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
+		goto fail;
+	}
+	priv->mclk_freq = clk_get_rate(codec_clk);
+
+	snd_soc_card_imx_cs42888.dev = &pdev->dev;
+
+	platform_set_drvdata(pdev, &snd_soc_card_imx_cs42888);
+
+	ret = snd_soc_register_card(&snd_soc_card_imx_cs42888);
+	if (ret)
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+fail:
+	if (asrc_np)
+		of_node_put(asrc_np);
+	if (esai_np)
+		of_node_put(esai_np);
+	if (codec_np)
+		of_node_put(codec_np);
+	return ret;
+}
+
+static int imx_cs42888_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_card(&snd_soc_card_imx_cs42888);
+	return 0;
+}
+
+static const struct of_device_id imx_cs42888_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-cs42888", },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver imx_cs42888_driver = {
+	.probe = imx_cs42888_probe,
+	.remove = imx_cs42888_remove,
+	.driver = {
+		.name = "imx-cs42888",
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_cs42888_dt_ids,
+	},
+};
+module_platform_driver(imx_cs42888_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("ALSA SoC cs42888 Machine Layer Driver");
+MODULE_ALIAS("platform:imx-cs42888");
+MODULE_LICENSE("GPL");