[PATCH] ASoC: rockchip-max98090: add driver for rockchip board using a max98090

[Jianqun <jay.xu@rock-chips.com>]

The driver is used for rockchip board using a max98090.
Test on RK3288 with max98090.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---
 sound/soc/rockchip/Kconfig             |   9 +
 sound/soc/rockchip/Makefile            |   5 +-
 sound/soc/rockchip/rockchip_max98090.c | 326 +++++++++++++++++++++++++++++++++
 3 files changed, 339 insertions(+), 1 deletion(-)
 create mode 100644 sound/soc/rockchip/rockchip_max98090.c

diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig
index 78fc159..f82fbf5 100644
--- a/sound/soc/rockchip/Kconfig
+++ b/sound/soc/rockchip/Kconfig
@@ -9,3 +9,12 @@ config SND_SOC_ROCKCHIP
 
 config SND_SOC_ROCKCHIP_I2S
 	tristate
+
+config SND_SOC_ROCKCHIP_MAX98090
+	tristate "ASoC support for Rockchip boards using a MAX98090 codec"
+	depends on SND_SOC_ROCKCHIP && I2C && GPIOLIB
+	select SND_SOC_ROCKCHIP_I2S
+	select SND_SOC_MAX98090
+	help
+	  Say Y or M here if you want to add support for SoC audio on Rockchip
+	  boards using the MAX98090 codec, such as Veyron.
diff --git a/sound/soc/rockchip/Makefile b/sound/soc/rockchip/Makefile
index b921909..c324411 100644
--- a/sound/soc/rockchip/Makefile
+++ b/sound/soc/rockchip/Makefile
@@ -1,4 +1,7 @@
 # ROCKCHIP Platform Support
 snd-soc-i2s-objs := rockchip_i2s.o
-
 obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-i2s.o
+
+# ROCKCHIP Machine Support
+snd-soc-rockchip-max98090-objs := rockchip_max98090.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_MAX98090) += snd-soc-rockchip-max98090.o
diff --git a/sound/soc/rockchip/rockchip_max98090.c b/sound/soc/rockchip/rockchip_max98090.c
new file mode 100644
index 0000000..eb99ae7
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_max98090.c
@@ -0,0 +1,326 @@
+/*
+ * Rockchip machine ASoC driver for boards using a MAX90809 CODEC.
+ *
+ * Copyright (c) 2014, ROCKCHIP CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include "rockchip_i2s.h"
+
+#define DRV_NAME "rockchip-snd-max98090"
+#define RK_PLAT_CLK_12M      12000000
+
+struct rk_mc_private {
+	struct snd_soc_jack hp_jack;
+	struct snd_soc_jack mic_jack;
+};
+
+static const struct snd_soc_dapm_widget rk_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_MIC("Headset Mic", NULL),
+	SND_SOC_DAPM_MIC("Int Mic", NULL),
+	SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route rk_audio_map[] = {
+	{"IN34", NULL, "Headset Mic"},
+	{"IN34", NULL, "MICBIAS"},
+	{"MICBIAS", NULL, "Headset Mic"},
+	{"DMICL", NULL, "Int Mic"},
+	{"Headphone", NULL, "HPL"},
+	{"Headphone", NULL, "HPR"},
+	{"Ext Spk", NULL, "SPKL"},
+	{"Ext Spk", NULL, "SPKR"},
+};
+
+static const struct snd_kcontrol_new rk_mc_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Headphone"),
+	SOC_DAPM_PIN_SWITCH("Headset Mic"),
+	SOC_DAPM_PIN_SWITCH("Int Mic"),
+	SOC_DAPM_PIN_SWITCH("Ext Spk"),
+};
+
+static int rk_aif1_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params)
+{
+	int ret = 0;
+	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;
+
+/* Set max98090 as master, i2s clock output 12MHz for max98090 */
+	ret = snd_soc_dai_set_sysclk(cpu_dai, 0,
+				     RK_PLAT_CLK_12M,
+				     SND_SOC_CLOCK_OUT);
+	if (ret < 0) {
+		dev_err(codec_dai->dev, "Can't set codec clock %d\n", ret);
+		return ret;
+	}
+
+/* Max98090 receive 12MHz as source clock for internel pll */
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
+				     RK_PLAT_CLK_12M,
+				     SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(codec_dai->dev, "Can't set codec clock %d\n", ret);
+		return ret;
+	}
+
+	return ret;
+}
+
+static struct snd_soc_jack_pin hp_jack_pin = {
+	.pin	= "Headphone",
+	.mask	= SND_JACK_HEADPHONE,
+};
+
+static struct snd_soc_jack_pin mic_jack_pin = {
+	.pin	= "Headset Mic",
+	.mask	= SND_JACK_MICROPHONE,
+};
+
+static struct snd_soc_jack_gpio hp_jack_gpio = {
+	.name			= "hp-gpio",
+	.report			= SND_JACK_HEADPHONE,
+	.debounce_time		= 200,
+	.invert			= 1,
+};
+
+static struct snd_soc_jack_gpio mic_jack_gpio = {
+	.name			= "mic-gpio",
+	.report			= SND_JACK_MICROPHONE,
+	.debounce_time		= 200,
+	.invert			= 1,
+};
+
+static int rk_init(struct snd_soc_pcm_runtime *runtime)
+{
+	int ret = 0;
+	struct snd_soc_codec *codec = runtime->codec;
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+	struct snd_soc_card *card = runtime->card;
+	struct rk_mc_private *drv = snd_soc_card_get_drvdata(card);
+	struct snd_soc_jack *hp_jack = &drv->hp_jack;
+	struct snd_soc_jack *mic_jack = &drv->mic_jack;
+
+	card->dapm.idle_bias_off = true;
+
+	ret = snd_soc_add_card_controls(card, rk_mc_controls,
+					ARRAY_SIZE(rk_mc_controls));
+	if (ret) {
+		pr_err("unable to add card controls\n");
+		return ret;
+	}
+
+	snd_soc_dapm_enable_pin(dapm, "Headset Mic");
+	snd_soc_dapm_enable_pin(dapm, "Headphone");
+	snd_soc_dapm_enable_pin(dapm, "Ext Spk");
+	snd_soc_dapm_enable_pin(dapm, "Int Mic");
+
+	snd_soc_dapm_sync(dapm);
+
+	/* Enable headphone jack detection */
+	ret = snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
+			       hp_jack);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_jack_add_pins(hp_jack, 1, &hp_jack_pin);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_jack_add_gpios(hp_jack, 1, &hp_jack_gpio);
+	if (ret)
+		return ret;
+
+	/* Enable mic jack detection */
+	ret = snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
+			       mic_jack);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_jack_add_pins(mic_jack, 1, &mic_jack_pin);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_jack_add_gpios(mic_jack, 1, &mic_jack_gpio);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static struct snd_soc_ops rk_aif1_ops = {
+	.hw_params = rk_aif1_hw_params,
+};
+
+static struct snd_soc_dai_link rk_dailink = {
+	.name = "max98090",
+	.stream_name = "Audio",
+	.codec_dai_name = "HiFi",
+	.init = rk_init,
+	.ops = &rk_aif1_ops,
+	/* set max98090 as master */
+	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		SND_SOC_DAIFMT_CBM_CFM,
+};
+
+static struct snd_soc_card snd_soc_card_rk = {
+	.name = "ROCKCHIP-I2S",
+	.dai_link = &rk_dailink,
+	.num_links = 1,
+	.dapm_widgets = rk_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(rk_dapm_widgets),
+	.dapm_routes = rk_audio_map,
+	.num_dapm_routes = ARRAY_SIZE(rk_audio_map),
+	.controls = rk_mc_controls,
+	.num_controls = ARRAY_SIZE(rk_mc_controls),
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int snd_rk_prepare(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct rk_mc_private *drv = snd_soc_card_get_drvdata(card);
+
+	snd_soc_jack_free_gpios(&drv->hp_jack, 1, &hp_jack_gpio);
+	snd_soc_jack_free_gpios(&drv->mic_jack, 1, &mic_jack_gpio);
+
+	return snd_soc_suspend(dev);
+}
+
+static void snd_rk_complete(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct rk_mc_private *drv = snd_soc_card_get_drvdata(card);
+
+	snd_soc_jack_add_gpios(&drv->hp_jack, 1, &hp_jack_gpio);
+	snd_soc_jack_add_gpios(&drv->mic_jack, 1, &mic_jack_gpio);
+
+	snd_soc_resume(dev);
+}
+
+static const struct dev_pm_ops rk_max98090_pm_ops = {
+	.prepare = snd_rk_prepare,
+	.complete = snd_rk_complete,
+};
+
+#define RK_MAX98090_PM_OPS	(&rk_max98090_pm_ops)
+#else
+#define RK_MAX98090_PM_OPS	NULL
+#endif
+
+static int snd_rk_mc_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+	struct rk_mc_private *drv;
+	struct snd_soc_card *card = &snd_soc_card_rk;
+	struct device_node *np = pdev->dev.of_node;
+
+	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
+	if (!drv)
+		return -ENOMEM;
+
+	hp_jack_gpio.gpio = of_get_named_gpio(np, "rockchip,hp-det-gpios", 0);
+	if (hp_jack_gpio.gpio == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+
+	mic_jack_gpio.gpio = of_get_named_gpio(np, "rockchip,mic-det-gpios", 0);
+	if (mic_jack_gpio.gpio == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+
+	/* register the soc card */
+	card->dev = &pdev->dev;
+	platform_set_drvdata(pdev, card);
+	snd_soc_card_set_drvdata(card, drv);
+
+	rk_dailink.codec_of_node = of_parse_phandle(np,
+			"rockchip,audio-codec", 0);
+	if (!rk_dailink.codec_of_node) {
+		dev_err(&pdev->dev,
+			"Property 'rockchip,audio-codec' missing or invalid\n");
+		return -EINVAL;
+	}
+
+	rk_dailink.cpu_of_node = of_parse_phandle(np,
+			"rockchip,i2s-controller", 0);
+	if (!rk_dailink.cpu_of_node) {
+		dev_err(&pdev->dev,
+			"Property 'rockchip,i2s-controller' missing or invalid\n");
+		return -EINVAL;
+	}
+
+	rk_dailink.platform_of_node = rk_dailink.cpu_of_node;
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		pr_err("snd_soc_register_card failed %d\n", ret);
+		return ret;
+	}
+	platform_set_drvdata(pdev, &card);
+
+	ret = snd_soc_of_parse_card_name(card, "rockchip,model");
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static int snd_rk_mc_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *soc_card = platform_get_drvdata(pdev);
+	struct rk_mc_private *drv = snd_soc_card_get_drvdata(soc_card);
+
+	snd_soc_jack_free_gpios(&drv->hp_jack, 1, &hp_jack_gpio);
+	snd_soc_jack_free_gpios(&drv->mic_jack, 1, &mic_jack_gpio);
+
+	snd_soc_card_set_drvdata(soc_card, NULL);
+	snd_soc_unregister_card(soc_card);
+	platform_set_drvdata(pdev, NULL);
+	return 0;
+}
+
+static const struct of_device_id rockchip_max98090_of_match[] = {
+	{ .compatible = "rockchip,rockchip-audio-max98090", },
+	{},
+};
+
+static struct platform_driver snd_rk_mc_driver = {
+	.probe = snd_rk_mc_probe,
+	.remove = snd_rk_mc_remove,
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+		.pm = RK_MAX98090_PM_OPS,
+		.of_match_table = rockchip_max98090_of_match,
+	},
+};
+
+module_platform_driver(snd_rk_mc_driver);
+MODULE_AUTHOR("jianqun <jay.xu@rock-chips.com>");
+MODULE_DESCRIPTION("Rockchip max98090 machine ASoC driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, rockchip_max98090_of_match);
-- 
1.9.1