MLK-10518-1 ASoC: imx-sii902x: add machine driver for sii902x hdmi audio

Add machine driver for sii902x hdmi audio. Restricting by SAI master clock,
the hdmi audio just support 16bit 24bit sample width and 32k 48k sample rate.

Signed-off-by: Zidan Wang <zidan.wang@freescale.com>
(cherry picked from commit 8dc359b46c81105efcd13007325d9cadc9a6214d)

1 files changed, 242 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-sii902x.c b/sound/soc/fsl/imx-sii902x.c
new file mode 100644
index 000000000000..61154776b0fc
--- /dev/null
+++ b/sound/soc/fsl/imx-sii902x.c
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2015 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 <linux/pinctrl/consumer.h>
+
+#define SUPPORT_RATE_NUM 10
+
+struct imx_sii902x_data {
+	struct snd_soc_dai_link dai;
+	struct snd_soc_card card;
+	struct i2c_client *sii902x;
+};
+
+static int imx_sii902x_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	static struct snd_pcm_hw_constraint_list constraint_rates;
+	static u32 support_rates[SUPPORT_RATE_NUM];
+	int ret;
+
+	support_rates[0] = 32000;
+	support_rates[1] = 48000;
+	constraint_rates.list = support_rates;
+	constraint_rates.count = 2;
+
+	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+						&constraint_rates);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int imx_sii902x_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 device *dev = card->dev;
+	struct imx_sii902x_data *data = snd_soc_card_get_drvdata(card);
+	int ret;
+	unsigned char reg;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai,
+			SND_SOC_DAIFMT_LEFT_J |
+			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, 24);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+		return ret;
+	}
+
+	/* sii90sx hdmi audio setup */
+	i2c_smbus_write_byte_data(data->sii902x, 0x26, 0x90);
+	i2c_smbus_write_byte_data(data->sii902x, 0x20, 0x2d);
+	i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0x88);
+	i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0x91);
+	i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0xa2);
+	i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0xb3);
+	i2c_smbus_write_byte_data(data->sii902x, 0x27, 0);
+	switch (params_rate(params)) {
+	case 44100:
+		reg = 0;
+		break;
+	case 48000:
+		reg = 0x2;
+		break;
+	case 32000:
+		reg = 0x3;
+		break;
+	case 88200:
+		reg = 0x8;
+		break;
+	case 96000:
+		reg = 0xa;
+		break;
+	case 176400:
+		reg = 0xc;
+		break;
+	case 192000:
+		reg = 0xe;
+		break;
+	default:
+		reg = 0x1;
+		break;
+	}
+	i2c_smbus_write_byte_data(data->sii902x, 0x24, reg);
+	i2c_smbus_write_byte_data(data->sii902x, 0x25, 0x0b);
+	i2c_smbus_write_byte_data(data->sii902x, 0x26, 0x80);
+
+	return 0;
+}
+
+static int imx_sii902x_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_card *card = rtd->card;
+	struct imx_sii902x_data *data = snd_soc_card_get_drvdata(card);
+
+	i2c_smbus_write_byte_data(data->sii902x, 0x26, 0x10);
+
+	return 0;
+}
+
+static struct snd_soc_ops imx_sii902x_ops = {
+	.startup = imx_sii902x_startup,
+	.hw_params = imx_sii902x_hw_params,
+	.hw_free = imx_sii902x_hw_free,
+};
+
+static int imx_sii902x_probe(struct platform_device *pdev)
+{
+	struct device_node *cpu_np, *sii902x_np;
+	struct platform_device *cpu_pdev;
+	struct imx_sii902x_data *data;
+	int ret;
+
+	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;
+	}
+
+	sii902x_np = of_parse_phandle(pdev->dev.of_node, "hdmi-controler", 0);
+	if (!sii902x_np) {
+		dev_err(&pdev->dev, "sii902x 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;
+	}
+
+	data->sii902x = of_find_i2c_device_by_node(sii902x_np);
+	if (!data->sii902x) {
+		dev_err(&pdev->dev, "failed to find sii902x i2c client\n");
+		ret = -EPROBE_DEFER;
+		goto fail;
+	}
+
+	data->dai.name = "sii902x hdmi";
+	data->dai.stream_name = "sii902x 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_sii902x_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;
+	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 (sii902x_np)
+		of_node_put(sii902x_np);
+	return ret;
+}
+
+static const struct of_device_id imx_sii902x_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-sii902x", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_sii902x_dt_ids);
+
+static struct platform_driver imx_sii902x_driver = {
+	.driver = {
+		.name = "imx-sii902x",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_sii902x_dt_ids,
+	},
+	.probe = imx_sii902x_probe,
+};
+module_platform_driver(imx_sii902x_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX SII902X hdmi audio ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-sii902x");