path: root/bsp/meta-freescale-3rdparty/recipes-kernel/linux/linux-compulab-3.14.28/0015-ARM-i.MX6-ASoC-add-imx-wm8731-machine-driver.patch

From 5fbe55d2945782fee3f3238f20a8dcd0b9ba630c Mon Sep 17 00:00:00 2001
From: Valentin Raevsky <valentin@compulab.co.il>
Date: Sun, 20 Jul 2014 11:10:12 +0300
Subject: [PATCH 15/59] ARM: i.MX6: ASoC: add imx-wm8731 machine driver

This is the initial imx-wm8731 device-tree-only machine driver working with
fsl_ssi driver. Works in the slave mode.

Signed-off-by: Valentin Raevsky <valentin@compulab.co.il>
---
 sound/soc/fsl/Kconfig      |   12 ++
 sound/soc/fsl/Makefile     |    2 +
 sound/soc/fsl/imx-wm8731.c |  505 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 519 insertions(+)
 create mode 100644 sound/soc/fsl/imx-wm8731.c

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 573dabb..bb229da 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -252,6 +252,18 @@ config SND_SOC_IMX_CS42888
 	 Say Y if you want to add support for SoC audio on an i.MX board with
 	 a cs42888 codec.
 
+config SND_SOC_IMX_WM8731
+	tristate "SoC Audio support for i.MX boards with wm8731"
+	depends on OF && I2C
+	select SND_SOC_WM8731
+	select SND_SOC_IMX_PCM_DMA
+	select SND_SOC_IMX_AUDMUX
+	select SND_SOC_FSL_SSI
+	select SND_SOC_FSL_UTILS
+	help
+	  Say Y if you want to add support for SoC audio on an i.MX board with
+	  a wm8731 codec.
+
 config SND_SOC_IMX_WM8962
 	tristate "SoC Audio support for i.MX boards with wm8962"
 	depends on OF && I2C
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 144cd69..65f8e6f 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -55,6 +55,7 @@ snd-soc-mx27vis-aic32x4-objs := mx27vis-aic32x4.o
 snd-soc-wm1133-ev1-objs := wm1133-ev1.o
 snd-soc-imx-cs42888-objs := imx-cs42888.o
 snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
+snd-soc-imx-wm8731-objs := imx-wm8731.o
 snd-soc-imx-wm8962-objs := imx-wm8962.o
 snd-soc-imx-spdif-objs := imx-spdif.o
 snd-soc-imx-mc13783-objs := imx-mc13783.o
@@ -69,6 +70,7 @@ obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o
 obj-$(CONFIG_SND_SOC_IMX_CS42888) += snd-soc-imx-cs42888.o
 obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
 obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
+obj-$(CONFIG_SND_SOC_IMX_WM8731) += snd-soc-imx-wm8731.o
 obj-$(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_HDMI) += snd-soc-imx-hdmi.o
diff --git a/sound/soc/fsl/imx-wm8731.c b/sound/soc/fsl/imx-wm8731.c
new file mode 100644
index 0000000..ba1363f
--- /dev/null
+++ b/sound/soc/fsl/imx-wm8731.c
@@ -0,0 +1,505 @@
+/*
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ *
+ * Based on imx-sgtl5000.c
+ * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012 Linaro Ltd.
+ *
+ * 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/of_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/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/pinctrl/consumer.h>
+
+#include "../codecs/wm8731.h"
+#include "imx-audmux.h"
+#include "imx-ssi.h"
+
+#define DAI_NAME_SIZE	32
+
+struct imx_wm8731_data {
+	struct snd_soc_dai_link dai;
+	struct snd_soc_card card;
+	char codec_dai_name[DAI_NAME_SIZE];
+	char platform_name[DAI_NAME_SIZE];
+	struct i2c_client *codec_dev;
+	/* audio_clocking_data */
+	struct clk *pll;
+	struct clk *clock_root;
+	long sysclk;
+	long current_rate;
+	/* platfor data */
+	unsigned int ssi_num;
+	unsigned int src_port;
+	unsigned int ext_port;
+};
+
+static int imx_wm8731_init(struct snd_soc_pcm_runtime *rtd);
+static int imx_hifi_hw_params_slv_mode(struct snd_pcm_substream *substream,
+                                       struct snd_pcm_hw_params *params);
+static void imx_hifi_shutdown(struct snd_pcm_substream *substream);
+
+struct imx_priv {
+	struct platform_device *pdev;
+	struct imx_wm8731_data *data;
+};
+
+static struct imx_priv card_priv;
+
+static struct snd_soc_ops imx_hifi_ops = {
+	.shutdown	= imx_hifi_shutdown,
+	.hw_params	= imx_hifi_hw_params_slv_mode,
+};
+
+/* imx card dapm widgets */
+static const struct snd_soc_dapm_widget imx_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack",       NULL),
+	SND_SOC_DAPM_SPK("Ext Spk",             NULL),
+	SND_SOC_DAPM_LINE("Line Jack",          NULL),
+	SND_SOC_DAPM_MIC("Mic Jack",            NULL),
+};
+
+/* imx machine connections to the codec pins */
+static const struct snd_soc_dapm_route audio_map[] = {
+	{ "Headphone Jack",     NULL,   "LHPOUT" },
+	{ "Headphone Jack",     NULL,   "RHPOUT" },
+
+	{ "Ext Spk",            NULL,   "LOUT" },
+	{ "Ext Spk",            NULL,   "ROUT" },
+
+	{ "LLINEIN",            NULL,   "Line Jack" },
+	{ "RLINEIN",            NULL,   "Line Jack" },
+
+	{ "MICIN",              NULL,   "Mic Bias" },
+	{ "Mic Bias",           NULL,   "Mic Jack"},
+};
+
+static int wm8731_slv_mode_init(struct imx_wm8731_data *data)
+{
+	struct clk *new_parent;
+	struct clk *ssi_clk;
+	struct i2c_client *codec_dev = data->codec_dev;
+
+	new_parent = devm_clk_get(&codec_dev->dev, "pll4");
+	if (IS_ERR(new_parent)) {
+		pr_err("Could not get \"pll4\" clock \n");
+		return PTR_ERR(new_parent);
+	}
+
+	ssi_clk = devm_clk_get(&codec_dev->dev, "imx-ssi.1");
+	if (IS_ERR(ssi_clk)) {
+		pr_err("Could not get \"imx-ssi.1\" clock \n");
+		return PTR_ERR(ssi_clk);
+	}
+
+	clk_set_parent(ssi_clk, new_parent);
+
+	data->pll = new_parent;
+	data->clock_root = ssi_clk;
+	data->current_rate = 0;
+
+	data->sysclk = 0;
+
+	return 0;
+}
+
+static int wm8731_slv_mode_clock_enable(int enable, struct imx_wm8731_data *data)
+{
+	long pll_rate;
+	long rate_req;
+	long rate_avail;
+
+	if (!enable)
+		return 0;
+
+	if (data->sysclk == data->current_rate)
+		return 0;
+
+	switch (data->sysclk) {
+		case 11289600:
+			pll_rate = 632217600;
+			break;
+
+		case 12288000:
+			pll_rate = 688128000;
+			break;
+
+		default:
+			return -EINVAL;
+	}
+
+	rate_req = pll_rate;
+	rate_avail = clk_round_rate(data->pll, rate_req);
+	clk_set_rate(data->pll, rate_avail);
+
+	rate_req = data->sysclk;
+	rate_avail = clk_round_rate(data->clock_root,
+								rate_req);
+	clk_set_rate(data->clock_root, rate_avail);
+
+	pr_info("%s: \"imx-ssi.1\" rate = %ld (= %ld)\n",
+			__func__, rate_avail, rate_req);
+
+	data->current_rate = data->sysclk;
+
+	return 0;
+}
+
+static int imx_hifi_hw_params_slv_mode(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 snd_soc_card *card = codec_dai->codec->card;
+	struct imx_wm8731_data *data = snd_soc_card_get_drvdata(card);
+	
+	u32 dai_format, pll_out;
+	snd_pcm_format_t sample_format;
+	unsigned int channels;
+	unsigned int tx_mask, rx_mask;
+	unsigned int sampling_rate;
+	unsigned int div_2, div_psr, div_pm;
+	int ret;
+
+	sampling_rate = params_rate(params);
+	sample_format = params_format(params);
+	
+	channels = params_channels(params);
+	printk("%s:%s  sampling rate = %u  channels = %u \n", __FUNCTION__,
+		   (substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "Playback" : "Capture"),
+		   sampling_rate, channels);
+
+	/* set CPU DAI configuration */
+	switch (sampling_rate) {
+		case 8000:
+		case 32000:
+		case 48000:
+		case 96000:
+			data->sysclk = 12288000;
+			break;
+
+		case 44100:
+		case 88200:
+			data->sysclk = 11289600;
+			break;
+
+		default:
+			return -EINVAL;
+	}
+
+	wm8731_slv_mode_clock_enable(1,data);
+
+	dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
+		SND_SOC_DAIFMT_CBS_CFS;
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
+	if (ret < 0)
+		return ret;
+
+	/* set i.MX active slot mask */
+	/* S[TR]CCR:DC */
+	tx_mask = ~((1 << channels) - 1);
+	rx_mask = tx_mask;
+	snd_soc_dai_set_tdm_slot(cpu_dai, tx_mask, rx_mask, 2, 32);
+
+	/*
+	 * SSI sysclk divider:
+	 * div_2:	/1 or /2
+	 * div_psr:	/1 or /8
+	 * div_pm:	/1 .. /256
+	 */
+	div_2	= 0;
+	div_psr	= 0;
+	switch (sampling_rate) {
+		case 8000:
+			// 1x1x12
+			div_pm	= 11;
+			break;
+		case 32000:
+			// 1x1x3
+			div_pm	= 2;
+			break;
+		case 48000:
+			// 1x1x2
+			div_pm	= 1;
+			break;
+		case 96000:
+			// 1x1x1
+			div_pm	= 0;
+			break;
+		case 44100:
+			// 1x1x2
+			div_pm	= 1;
+			break;
+		case 88200:
+			// 1x1x1
+			div_pm	= 0;
+			break;
+		default:
+			return -EINVAL;
+	}
+
+	/* sync mode: a single clock controls both playback and capture */
+	snd_soc_dai_set_clkdiv(cpu_dai, IMX_SSI_TX_DIV_2, (div_2 ? SSI_STCCR_DIV2 : 0));
+	snd_soc_dai_set_clkdiv(cpu_dai, IMX_SSI_TX_DIV_PSR, (div_psr ? SSI_STCCR_PSR : 0));
+	snd_soc_dai_set_clkdiv(cpu_dai, IMX_SSI_TX_DIV_PM, div_pm);
+
+	/* set codec DAI configuration */
+	dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		SND_SOC_DAIFMT_CBS_CFS;
+
+	ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_dai_set_sysclk(codec_dai,
+				     WM8731_SYSCLK_MCLK,
+				     data->sysclk,
+				     SND_SOC_CLOCK_IN);
+
+	if (ret < 0) {
+		pr_err("Failed to set codec master clock to %u: %d \n",
+		       data->sysclk, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void imx_hifi_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_card *card = codec_dai->codec->card;
+	struct imx_wm8731_data *data = snd_soc_card_get_drvdata(card);
+	
+	if (!codec_dai->active)
+		wm8731_slv_mode_clock_enable(0,data);
+	
+	return;
+}
+
+static int imx_wm8731_init(struct snd_soc_pcm_runtime *rtd)
+{
+	int ret = 0;
+	struct snd_soc_codec *codec = rtd->codec;
+
+	/* Add imx specific widgets */
+	ret = snd_soc_dapm_new_controls(&codec->dapm, imx_dapm_widgets,
+									ARRAY_SIZE(imx_dapm_widgets));
+	if (ret)
+			goto out_retcode;
+
+	/* Set up imx specific audio path audio_map */
+	ret = snd_soc_dapm_add_routes(&codec->dapm, audio_map, ARRAY_SIZE(audio_map));
+	if (ret)
+			goto out_retcode;
+
+	ret = snd_soc_dapm_enable_pin(&codec->dapm, "Headphone Jack");
+	if (ret)
+			goto out_retcode;
+
+	ret = snd_soc_dapm_nc_pin(&codec->dapm, "Ext Spk");
+	if (ret)
+			goto out_retcode;
+
+out_retcode:
+
+	if (ret)
+			pr_err("%s: failed with error code: %d \n", __FUNCTION__, ret);
+	else
+			pr_info("%s: success \n", __FUNCTION__);
+
+	return ret;
+}
+
+/**
+ * Configure AUDMUX interconnection between
+ * _slave (CPU side) and _master (codec size)
+ *
+ * When SSI operates in master mode, 5-wire interconnect with
+ * audio codec is required:
+ * TXC  - BCLK
+ * TXD  - DAC data
+ * RXD  - ADC data
+ * TXFS - {DAC|ADC}LRC, i.e. word clock
+ * RXC  - MCLK, i.e. oversampling clock
+ * Audmux is operated in asynchronous mode to enable 6-wire
+ * interface (as opposed to 4-wire interface in sync mode).
+ */
+static int imx_audmux_config_slv_mode(int _slave, int _master)
+{
+	unsigned int ptcr, pdcr;
+	int slave = _slave - 1;
+	int master = _master - 1;
+
+	ptcr = IMX_AUDMUX_V2_PTCR_SYN |
+		IMX_AUDMUX_V2_PTCR_TFSDIR |
+		IMX_AUDMUX_V2_PTCR_TFSEL(slave) |
+		IMX_AUDMUX_V2_PTCR_RCLKDIR |
+		IMX_AUDMUX_V2_PTCR_RCSEL(slave | 0x8) |
+		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);
+	ptcr = ptcr & ~IMX_AUDMUX_V2_PTCR_SYN;
+	imx_audmux_v2_configure_port(master, ptcr, pdcr);
+
+	ptcr = IMX_AUDMUX_V2_PTCR_SYN |
+		IMX_AUDMUX_V2_PTCR_RCLKDIR |
+		IMX_AUDMUX_V2_PTCR_RCSEL(master | 0x8) |
+		IMX_AUDMUX_V2_PTCR_TCLKDIR |
+		IMX_AUDMUX_V2_PTCR_TCSEL(master);
+
+	pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(master);
+	imx_audmux_v2_configure_port(slave, ptcr, pdcr);
+	ptcr = ptcr & ~IMX_AUDMUX_V2_PTCR_SYN;
+	imx_audmux_v2_configure_port(slave, ptcr, pdcr);
+
+	return 0;
+}
+
+static int imx_wm8731_probe(struct platform_device *pdev)
+{
+	struct device_node *ssi_np, *codec_np;
+	struct platform_device *ssi_pdev;
+	struct imx_priv *priv = &card_priv;
+	struct i2c_client *codec_dev;
+	struct imx_wm8731_data *data;
+	int ret;
+
+	priv->pdev = pdev;
+	
+	ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
+	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
+	if (!ssi_np || !codec_np) {
+		dev_err(&pdev->dev, "phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	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 fail;
+	}
+        
+	codec_dev = of_find_i2c_device_by_node(codec_np);
+	if (!codec_dev || !codec_dev->driver) {
+		dev_err(&pdev->dev, "failed to find codec platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	card_priv.data = data;
+
+	data->codec_dev = codec_dev;
+	
+	data->dai.name = "HiFi";
+	data->dai.stream_name = "HiFi";
+	data->dai.codec_dai_name = "wm8731-hifi";
+	data->dai.codec_of_node = codec_np;
+	data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
+	data->dai.platform_of_node = ssi_np;
+	data->dai.ops = &imx_hifi_ops;
+	data->dai.init = &imx_wm8731_init;
+	
+	data->ssi_num = 2; /* 1-based */
+	data->src_port = 2;
+	data->ext_port = 4;
+	
+	imx_audmux_config_slv_mode(data->src_port, data->ext_port);
+	
+	/* Slave Mode Init */
+	wm8731_slv_mode_init(data);
+	
+	data->card.dev = &pdev->dev;
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+	
+	ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
+	if (ret)
+		goto fail;
+
+	data->card.num_links = 1;
+	data->card.dai_link = &data->dai;
+
+	data->card.dapm_widgets = imx_dapm_widgets;
+	data->card.num_dapm_widgets = ARRAY_SIZE(imx_dapm_widgets);
+
+	platform_set_drvdata(pdev, &data->card);
+	snd_soc_card_set_drvdata(&data->card, data);
+
+	ret = snd_soc_register_card(&data->card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+		goto fail;
+	}
+	
+	return 0;
+
+fail:
+
+	if (ssi_np)
+		of_node_put(ssi_np);
+
+	if (codec_np)
+		of_node_put(codec_np);
+
+	return ret;
+}
+
+static int imx_wm8731_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	snd_soc_unregister_card(card);
+
+	return 0;
+}
+
+static const struct of_device_id imx_wm8731_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-wm8731", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_wm8731_dt_ids);
+
+static struct platform_driver imx_wm8731_driver = {
+	.driver = {
+		.name = "imx-wm8731",
+		.owner = THIS_MODULE,
+		.of_match_table = imx_wm8731_dt_ids,
+	},
+	.probe = imx_wm8731_probe,
+	.remove = imx_wm8731_remove,
+};
+module_platform_driver(imx_wm8731_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX WM8731 ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-wm8731");
-- 
1.7.9.5