MLK-16130-2: ASoC: fsl: add machine driver for cadence hdmi

The machine driver will call the API which is provided by
the cadence to configure the audio features.

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

3 files changed, 278 insertions, 0 deletions

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index bf8e7f8953c9..893194ed812e 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -477,6 +477,17 @@ config SND_SOC_IMX_AMIX
 	  Say Y if you want to add support for SoC audio on an i.MX board with
 	  an AMIX.
 
+config SND_SOC_IMX_CDNHDMI
+	tristate "SoC Audio support for i.MX boards with CDN HDMI port"
+	depends on FB_MX8_HDMI
+	select SND_SOC_IMX_PCM_DMA
+	select SND_SOC_FSL_SAI
+	select SND_SOC_HDMI_CODEC
+	help
+	  SoC Audio support for i.MX boards with CDN HDMI audio
+	  Say Y if you want to add support for SoC audio on an i.MX board with
+	  IMX CDN HDMI.
+
 endif # SND_IMX_SOC
 
 endmenu
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 6386fcee929c..ea1a501015e1 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -79,6 +79,7 @@ snd-soc-imx-mc13783-objs := imx-mc13783.o
 snd-soc-imx-mqs-objs := imx-mqs.o
 snd-soc-imx-si476x-objs := imx-si476x.o
 snd-soc-imx-hdmi-objs := imx-hdmi.o
+snd-soc-imx-cdnhdmi-objs := imx-cdnhdmi.o
 snd-soc-imx-rpmsg-objs := imx-rpmsg.o
 snd-soc-imx-amix-objs := imx-amix.o
 
@@ -102,5 +103,6 @@ obj-$(CONFIG_SND_SOC_IMX_MQS) += snd-soc-imx-mqs.o
 obj-$(CONFIG_SND_SOC_IMX_SI476X) += snd-soc-imx-si476x.o
 obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
 obj-$(CONFIG_SND_SOC_IMX_AMIX) += snd-soc-imx-amix.o
+obj-$(CONFIG_SND_SOC_IMX_CDNHDMI) += snd-soc-imx-cdnhdmi.o
 
 AFLAGS_hdmi_pcm.o := -march=armv7-a -mtune=cortex-a9 -mfpu=neon -mfloat-abi=softfp
diff --git a/sound/soc/fsl/imx-cdnhdmi.c b/sound/soc/fsl/imx-cdnhdmi.c
new file mode 100644
index 000000000000..34ee525777ee
--- /dev/null
+++ b/sound/soc/fsl/imx-cdnhdmi.c
@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
+ *
+ * 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 "../../../drivers/video/fbdev/mxc/cdn_hdp/API_General.h"
+#include "../../../drivers/video/fbdev/mxc/cdn_hdp/API_Audio.h"
+
+#define SUPPORT_RATE_NUM 10
+#define SUPPORT_CHANNEL_NUM 10
+
+struct imx_cdnhdmi_data {
+	struct snd_soc_dai_link dai;
+	struct snd_soc_card card;
+	int vmode_index;
+};
+
+static int imx_cdnhdmi_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	static struct snd_pcm_hw_constraint_list constraint_rates;
+	static struct snd_pcm_hw_constraint_list constraint_channels;
+	static u32 support_rates[SUPPORT_RATE_NUM];
+	static u32 support_channels[SUPPORT_CHANNEL_NUM];
+	int ret;
+
+	support_rates[0] = 48000;
+	support_rates[1] = 96000;
+	support_rates[2] = 32000;
+	support_rates[3] = 192000;
+	constraint_rates.list = support_rates;
+	constraint_rates.count = 4;
+
+	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+						&constraint_rates);
+	if (ret)
+		return ret;
+
+	support_channels[0] = 2;
+	support_channels[1] = 4;
+	support_channels[2] = 8;
+	constraint_channels.list = support_channels;
+	constraint_channels.count = 3;
+
+	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+						&constraint_channels);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int imx_cdnhdmi_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_card *card = rtd->card;
+	struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+	struct device *dev = card->dev;
+	unsigned int sample_rate = params_rate(params);
+	unsigned int channels = params_channels(params);
+	unsigned int width = params_physical_width(params);
+	AUDIO_FREQ  freq;
+	AUDIO_WIDTH bits;
+	int ret;
+	int ncts_n;
+
+	/* 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(dev, "failed to set cpu dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
+	if (ret) {
+		dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, 32);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+		return ret;
+	}
+
+	switch (sample_rate) {
+	case 32000:
+		freq = AUDIO_FREQ_32;
+		ncts_n = data->vmode_index == 95 ? 3072 : 4096;
+		break;
+	case 44100:
+		freq = AUDIO_FREQ_44_1;
+		ncts_n = data->vmode_index == 95 ? 4704 : 6272;
+		break;
+	case 48000:
+		freq = AUDIO_FREQ_48;
+		ncts_n = data->vmode_index == 95 ? 5120 : 6144;
+		break;
+	case 88200:
+		freq = AUDIO_FREQ_88_2;
+		ncts_n = data->vmode_index == 95 ? 9408 : 12544;
+		break;
+	case 96000:
+		freq = AUDIO_FREQ_96;
+		ncts_n = data->vmode_index == 95 ? 10240 : 12288;
+		break;
+	case 176400:
+		freq = AUDIO_FREQ_176_4;
+		ncts_n = data->vmode_index == 95 ? 18816 : 25088;
+		break;
+	case 192000:
+		freq = AUDIO_FREQ_192;
+		ncts_n = data->vmode_index == 95 ? 20480 : 24576;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (width) {
+	case 16:
+		bits = AUDIO_WIDTH_16;
+		break;
+	case 24:
+		bits = AUDIO_WIDTH_24;
+		break;
+	case 32:
+		bits = AUDIO_WIDTH_32;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+
+	CDN_API_AudioOff_blocking(AUDIO_TYPE_I2S);
+	CDN_API_AudioAutoConfig_blocking(AUDIO_TYPE_I2S,
+				channels,
+				freq,
+				0,
+				bits,
+				CDN_HDMITX_KIRAN,
+				ncts_n,
+				AUDIO_MUTE_MODE_UNMUTE);
+	return 0;
+}
+
+static struct snd_soc_ops imx_cdnhdmi_ops = {
+	.startup = imx_cdnhdmi_startup,
+	.hw_params = imx_cdnhdmi_hw_params,
+};
+
+static int imx_cdnhdmi_probe(struct platform_device *pdev)
+{
+	struct device_node *cpu_np, *cdnhdmi_np = NULL;
+	struct platform_device *cpu_pdev;
+	struct imx_cdnhdmi_data *data;
+	int ret;
+
+	cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	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;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	ret = of_property_read_u32(pdev->dev.of_node, "video-mode",
+					&data->vmode_index);
+	if (ret < 0) {
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data->dai.name = "imx8 hdmi";
+	data->dai.stream_name = "imx8 hdmi";
+	data->dai.codec_dai_name = "snd-soc-dummy-dai";
+	data->dai.codec_name = "snd-soc-dummy";
+	data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
+	data->dai.platform_of_node = cpu_np;
+	data->dai.ops = &imx_cdnhdmi_ops;
+	data->dai.playback_only = true;
+	data->dai.capture_only = false;
+	data->dai.dai_fmt = SND_SOC_DAIFMT_LEFT_J |
+			    SND_SOC_DAIFMT_NB_NF |
+			    SND_SOC_DAIFMT_CBS_CFS;
+
+	data->card.dev = &pdev->dev;
+	data->card.owner = THIS_MODULE;
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+	data->card.num_links = 1;
+	data->card.dai_link = &data->dai;
+
+	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 (cdnhdmi_np)
+		of_node_put(cdnhdmi_np);
+	return ret;
+}
+
+static const struct of_device_id imx_cdnhdmi_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-cdnhdmi", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_cdnhdmi_dt_ids);
+
+static struct platform_driver imx_cdnhdmi_driver = {
+	.driver = {
+		.name = "imx-cdnhdmi",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_cdnhdmi_dt_ids,
+	},
+	.probe = imx_cdnhdmi_probe,
+};
+module_platform_driver(imx_cdnhdmi_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-cdnhdmi");