[PATCHv1 6/8] ASoC: fsl: add SGT15000 based audio machine driver.

[Xiubo Li]

This is the SGTl5000 codec based audio driver supported with both
playback and capture dai link implemention.

This implementation is only compatible with device tree definition.

Signed-off-by: Alison Wang <b18965@xxxxxxxxxxxxx
Signed-off-by: Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
---
 sound/soc/fsl/Kconfig        |  10 +++
 sound/soc/fsl/Makefile       |   2 +
 sound/soc/fsl/fsl-sgtl5000.c | 208 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 220 insertions(+)
 create mode 100644 sound/soc/fsl/fsl-sgtl5000.c

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index a49b386..3fbbbf2 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -220,4 +220,14 @@ config SND_SOC_FSL_PCM
 	tristate
 	select SND_SOC_GENERIC_DMAENGINE_PCM
 
+config SND_SOC_FSL_SGTL5000
+	tristate "SoC Audio support for FSL boards with sgtl5000"
+	depends on OF && I2C
+	select SND_SOC_FSL_SAI
+	select SND_SOC_FSL_PCM
+	select SND_SOC_SGTL5000
+	help
+	  Say Y if you want to add support for SoC audio on an FSL board with
+	  a sgtl5000 codec.
+
 endif # SND_FSL_SOC
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 865ac23..e8bf0bd 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -58,6 +58,8 @@ obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
 # FSL ARM SAI/SGT15000 Platform Support
 snd-soc-fsl-sai-objs := fsl-sai.o
 snd-soc-fsl-pcm-objs := fsl-pcm-dma.o
+snd-soc-fsl-sgtl5000-objs := fsl-sgtl5000.o
 
 obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o
 obj-$(CONFIG_SND_SOC_FSL_PCM) += snd-soc-fsl-pcm.o
+obj-$(CONFIG_SND_SOC_FSL_SGTL5000) += snd-soc-fsl-sgtl5000.o
diff --git a/sound/soc/fsl/fsl-sgtl5000.c b/sound/soc/fsl/fsl-sgtl5000.c
new file mode 100644
index 0000000..bab85ec
--- /dev/null
+++ b/sound/soc/fsl/fsl-sgtl5000.c
@@ -0,0 +1,208 @@
+/*
+ * Freeacale ALSA SoC Audio using SGT1500 as codec.
+ *
+ * Copyright 2012-2013 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:
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/clk.h>
+
+#include "../codecs/sgtl5000.h"
+#include "fsl-sai.h"
+
+static unsigned int sysclk_rate;
+
+static int fsl_sgtl5000_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+	int ret;
+	struct device *dev = rtd->card->dev;
+
+	ret = snd_soc_dai_set_sysclk(rtd->codec_dai, SGTL5000_SYSCLK,
+				     sysclk_rate, SND_SOC_CLOCK_IN);
+	if (ret) {
+		dev_err(dev, "could not set codec driver clock params :%d\n",
+				ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, FSL_SAI_CLK_BUS,
+				     sysclk_rate, SND_SOC_CLOCK_OUT);
+	if (ret) {
+		dev_err(dev, "could not set cpu dai driver clock params :%d\n",
+				ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int sgtl5000_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;
+	unsigned int channels = params_channels(params);
+
+	/* TODO: The SAI driver should figure this out for us */
+	switch (channels) {
+	case 2:
+		snd_soc_dai_set_tdm_slot(cpu_dai, 0xfffffffc, 0xfffffffc, 2, 0);
+		break;
+	case 1:
+		snd_soc_dai_set_tdm_slot(cpu_dai, 0xfffffffe, 0xfffffffe, 1, 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_ops fsl_sgtl5000_hifi_ops = {
+	.hw_params = sgtl5000_params,
+};
+
+static struct snd_soc_dai_link fsl_sgtl5000_dai = {
+	.name = "HiFi",
+	.stream_name = "HiFi",
+	.codec_dai_name = "sgtl5000",
+	.init = &fsl_sgtl5000_dai_init,
+	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		SND_SOC_DAIFMT_CBM_CFM,
+	.ops = &fsl_sgtl5000_hifi_ops,
+};
+
+static const struct snd_soc_dapm_widget fsl_sgtl5000_dapm_widgets[] = {
+	SND_SOC_DAPM_MIC("Mic Jack", NULL),
+	SND_SOC_DAPM_LINE("Line In Jack", NULL),
+	SND_SOC_DAPM_HP("Headphone Jack", NULL),
+	SND_SOC_DAPM_SPK("Line Out Jack", NULL),
+	SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static struct snd_soc_card fsl_sgt1500_card = {
+	.owner = THIS_MODULE,
+	.num_links = 1,
+	.dai_link = &fsl_sgtl5000_dai,
+	.dapm_widgets = fsl_sgtl5000_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(fsl_sgtl5000_dapm_widgets),
+};
+
+static int fsl_sgtl5000_parse_dt(struct platform_device *pdev)
+{
+	int ret;
+	struct device_node *sai_np, *codec_np;
+	struct clk *codec_clk;
+	struct i2c_client *codec_dev;
+	struct device_node *np = pdev->dev.of_node;
+
+	ret = snd_soc_of_parse_card_name(&fsl_sgt1500_card, "model");
+	if (ret)
+		return ret;
+
+	ret = snd_soc_of_parse_audio_routing(&fsl_sgt1500_card,
+			"audio-routing");
+	if (ret)
+		return ret;
+
+	sai_np = of_parse_phandle(np, "saif-controller", 0);
+	if (!sai_np) {
+		dev_err(&pdev->dev, "\"saif-controller\" phandle missing or "
+				"invalid\n");
+		return -EINVAL;
+	}
+	fsl_sgtl5000_dai.cpu_of_node = sai_np;
+	fsl_sgtl5000_dai.platform_of_node = sai_np;
+
+	codec_np = of_parse_phandle(np, "audio-codec", 0);
+	if (!codec_np) {
+		dev_err(&pdev->dev, "\"audio-codec\" phandle missing or "
+				"invalid\n");
+		ret = -EINVAL;
+		goto sai_np_fail;
+	}
+	fsl_sgtl5000_dai.codec_of_node = codec_np;
+
+	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 = PTR_ERR(codec_dev);
+		goto codec_np_fail;
+	}
+
+	codec_clk = devm_clk_get(&codec_dev->dev, NULL);
+	if (IS_ERR(codec_clk)) {
+		dev_err(&pdev->dev, "failed to get codec clock\n");
+		ret = PTR_ERR(codec_clk);
+		goto codec_np_fail;
+	}
+
+	sysclk_rate = clk_get_rate(codec_clk);
+
+codec_np_fail:
+	of_node_put(codec_np);
+sai_np_fail:
+	of_node_put(sai_np);
+
+	return ret;
+}
+
+static int fsl_sgtl5000_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	fsl_sgt1500_card.dev = &pdev->dev;
+
+	ret = fsl_sgtl5000_parse_dt(pdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+				"parse sgtl5000 device tree failed :%d\n",
+				ret);
+		return ret;
+	}
+
+	ret = snd_soc_register_card(&fsl_sgt1500_card);
+	if (ret) {
+		dev_err(&pdev->dev, "register soc sound card failed :%d\n",
+				ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int fsl_sgtl5000_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_card(&fsl_sgt1500_card);
+
+	return 0;
+}
+
+static const struct of_device_id fsl_sgtl5000_dt_ids[] = {
+	{ .compatible = "fsl,vf610-sgtl5000", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, fsl_sgtl5000_dt_ids);
+
+static struct platform_driver fsl_sgtl5000_driver = {
+	.driver = {
+		.name = "fsl-sgtl5000",
+		.owner = THIS_MODULE,
+		.of_match_table = fsl_sgtl5000_dt_ids,
+	},
+	.probe = fsl_sgtl5000_probe,
+	.remove = fsl_sgtl5000_remove,
+};
+module_platform_driver(fsl_sgtl5000_driver);
+
+MODULE_AUTHOR("Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Freescale SGTL5000 ASoC driver");
+MODULE_LICENSE("GPL");
-- 
1.8.0


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