ASoC: tegra: Add MAX98088 machine driver

Bug 862023

Change-Id: I715ce95e3cece3fc8eeea81ab6b95ad6de3b2a1c
Reviewed-on: http://git-master/r/50907
Tested-by: Sumit Bhattacharya <sumitb@nvidia.com>
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

Rebase-Id: R736182cd182138901b3f79b6fbfe3adee8ce7105

3 files changed, 437 insertions, 1 deletions

diff --git a/sound/soc/tegra/Kconfig b/sound/soc/tegra/Kconfig
index f51b62570194..09ef031608d4 100644
--- a/sound/soc/tegra/Kconfig
+++ b/sound/soc/tegra/Kconfig
@@ -84,5 +84,24 @@ config SND_SOC_TEGRA_WM8753
 	select SND_SOC_WM8753
 	help
 	  Say Y or M here if you want to add support for SoC audio on Tegra
-	  boards using the WM8093 codec. Currently, only supported board is
+	  boards using the WM8753 codec. Currently, only supported board is
 	  Whistler.
+
+config MACH_HAS_SND_SOC_TEGRA_MAX98088
+	bool
+	help
+	  Machines that use the SND_SOC_TEGRA_MAX98088 driver should select
+	  this config option, in order to allow the user to enable
+	  SND_SOC_TEGRA_MAX98088.
+
+config SND_SOC_TEGRA_MAX98088
+	tristate "SoC Audio support for Tegra boards using a MAX98088 codec"
+	depends on SND_SOC_TEGRA && I2C
+	depends on MACH_HAS_SND_SOC_TEGRA_MAX98088
+	select SND_SOC_TEGRA20_I2S if ARCH_TEGRA_2x_SOC
+	select SND_SOC_TEGRA30_I2S if ARCH_TEGRA_3x_SOC
+	select SND_SOC_MAX98088
+	help
+	  Say Y or M here if you want to add support for SoC audio on Tegra
+	  boards using the MAX98088 codec. Currently, only supported board is
+	  Enterprise.
diff --git a/sound/soc/tegra/Makefile b/sound/soc/tegra/Makefile
index a6d039b0dc19..4a48e4b66f46 100644
--- a/sound/soc/tegra/Makefile
+++ b/sound/soc/tegra/Makefile
@@ -19,7 +19,9 @@ obj-$(CONFIG_SND_SOC_TEGRA_SPDIF) += snd-soc-tegra-spdif.o
 snd-soc-tegra-wm8903-objs := tegra_wm8903.o
 snd-soc-tegra-trimslice-objs := trimslice.o
 snd-soc-tegra-wm8753-objs := tegra_wm8753.o
+snd-soc-tegra-max98088-objs := tegra_max98088.o
 
 obj-$(CONFIG_SND_SOC_TEGRA_WM8903) += snd-soc-tegra-wm8903.o
 obj-$(CONFIG_SND_SOC_TEGRA_TRIMSLICE) += snd-soc-tegra-trimslice.o
 obj-$(CONFIG_SND_SOC_TEGRA_WM8753) += snd-soc-tegra-wm8753.o
+obj-$(CONFIG_SND_SOC_TEGRA_MAX98088) += snd-soc-tegra-max98088.o
diff --git a/sound/soc/tegra/tegra_max98088.c b/sound/soc/tegra/tegra_max98088.c
new file mode 100644
index 000000000000..12f9650ad2a5
--- /dev/null
+++ b/sound/soc/tegra/tegra_max98088.c
@@ -0,0 +1,415 @@
+/*
+ * tegra_max98088.c - Tegra machine ASoC driver for boards using MAX98088 codec.
+ *
+ * Author: Sumit Bhattacharya <sumitb@nvidia.com>
+ * Copyright (C) 2011 - NVIDIA, Inc.
+ *
+ * Based on code copyright/by:
+ *
+ * (c) 2010, 2011 Nvidia Graphics Pvt. Ltd.
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <asm/mach-types.h>
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
+
+#include <mach/tegra_max98088_pdata.h>
+
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "../codecs/max98088.h"
+
+#include "tegra_pcm.h"
+#include "tegra_asoc_utils.h"
+
+#define DRV_NAME "tegra-snd-max98088"
+
+#define GPIO_SPKR_EN    BIT(0)
+#define GPIO_HP_MUTE    BIT(1)
+#define GPIO_INT_MIC_EN BIT(2)
+#define GPIO_EXT_MIC_EN BIT(3)
+
+struct tegra_max98088 {
+	struct tegra_asoc_utils_data util_data;
+	struct tegra_max98088_platform_data *pdata;
+	int gpio_requested;
+};
+
+static int tegra_max98088_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 *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_card *card = codec->card;
+	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
+	int srate, mclk;
+	int err;
+
+	srate = params_rate(params);
+	switch (srate) {
+	case 8000:
+	case 16000:
+	case 24000:
+	case 32000:
+	case 48000:
+	case 64000:
+	case 96000:
+		mclk = 12288000;
+		break;
+	case 11025:
+	case 22050:
+	case 44100:
+	case 88200:
+		mclk = 11289600;
+		break;
+	default:
+		mclk = 12000000;
+		break;
+	}
+
+	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
+	if (err < 0) {
+		dev_err(card->dev, "Can't configure clocks\n");
+		return err;
+	}
+
+	err = snd_soc_dai_set_fmt(codec_dai,
+					SND_SOC_DAIFMT_I2S |
+					SND_SOC_DAIFMT_NB_NF |
+					SND_SOC_DAIFMT_CBS_CFS);
+	if (err < 0) {
+		dev_err(card->dev, "codec_dai fmt not set\n");
+		return err;
+	}
+
+	err = snd_soc_dai_set_fmt(cpu_dai,
+					SND_SOC_DAIFMT_I2S |
+					SND_SOC_DAIFMT_NB_NF |
+					SND_SOC_DAIFMT_CBS_CFS);
+	if (err < 0) {
+		dev_err(card->dev, "cpu_dai fmt not set\n");
+		return err;
+	}
+
+	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
+					SND_SOC_CLOCK_IN);
+	if (err < 0) {
+		dev_err(card->dev, "codec_dai clock not set\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_ops tegra_max98088_ops = {
+	.hw_params = tegra_max98088_hw_params,
+};
+
+static struct snd_soc_jack tegra_max98088_hp_jack;
+
+static struct snd_soc_jack_pin tegra_max98088_hp_jack_pins[] = {
+	{
+		.pin = "Headphone Jack",
+		.mask = SND_JACK_HEADPHONE,
+	},
+};
+
+static struct snd_soc_jack_gpio tegra_max98088_hp_jack_gpio = {
+	.name = "headphone detect",
+	.report = SND_JACK_HEADPHONE,
+	.debounce_time = 150,
+	.invert = 0,
+};
+
+static int tegra_max98088_event_int_spk(struct snd_soc_dapm_widget *w,
+					struct snd_kcontrol *k, int event)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = dapm->card;
+	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
+	struct tegra_max98088_platform_data *pdata = machine->pdata;
+
+	if (!(machine->gpio_requested & GPIO_SPKR_EN))
+		return 0;
+
+	gpio_set_value_cansleep(pdata->gpio_spkr_en,
+				SND_SOC_DAPM_EVENT_ON(event));
+
+	return 0;
+}
+
+static int tegra_max98088_event_hp(struct snd_soc_dapm_widget *w,
+					struct snd_kcontrol *k, int event)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = dapm->card;
+	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
+	struct tegra_max98088_platform_data *pdata = machine->pdata;
+
+	if (!(machine->gpio_requested & GPIO_HP_MUTE))
+		return 0;
+
+	gpio_set_value_cansleep(pdata->gpio_hp_mute,
+				!SND_SOC_DAPM_EVENT_ON(event));
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget tegra_max98088_dapm_widgets[] = {
+	SND_SOC_DAPM_SPK("Int Spk", tegra_max98088_event_int_spk),
+	SND_SOC_DAPM_OUTPUT("Earpiece"),
+	SND_SOC_DAPM_HP("Headphone Jack", tegra_max98088_event_hp),
+	SND_SOC_DAPM_MIC("Mic Jack", NULL),
+	SND_SOC_DAPM_INPUT("Int Mic"),
+};
+
+static const struct snd_soc_dapm_route enterprise_audio_map[] = {
+	{"Int Spk", NULL, "SPKL"},
+	{"Int Spk", NULL, "SPKR"},
+	{"Earpiece", NULL, "RECL"},
+	{"Earpiece", NULL, "RECR"},
+	{"Headphone Jack", NULL, "HPL"},
+	{"Headphone Jack", NULL, "HPR"},
+	{"MICBIAS", NULL, "Mic Jack"},
+	{"MIC2", NULL, "MICBIAS"},
+	{"MICBIAS", NULL, "Int Mic"},
+	{"MIC1", NULL, "MICBIAS"},
+};
+
+static const struct snd_kcontrol_new tegra_max98088_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Int Spk"),
+	SOC_DAPM_PIN_SWITCH("Earpiece"),
+	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
+	SOC_DAPM_PIN_SWITCH("Mic Jack"),
+	SOC_DAPM_PIN_SWITCH("Int Mic"),
+};
+
+static int tegra_max98088_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+	struct snd_soc_card *card = codec->card;
+	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
+	struct tegra_max98088_platform_data *pdata = machine->pdata;
+	int ret;
+
+	if (gpio_is_valid(pdata->gpio_spkr_en)) {
+		ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
+		if (ret) {
+			dev_err(card->dev, "cannot get spkr_en gpio\n");
+			return ret;
+		}
+		machine->gpio_requested |= GPIO_SPKR_EN;
+
+		gpio_direction_output(pdata->gpio_spkr_en, 0);
+	}
+
+	if (gpio_is_valid(pdata->gpio_hp_mute)) {
+		ret = gpio_request(pdata->gpio_hp_mute, "hp_mute");
+		if (ret) {
+			dev_err(card->dev, "cannot get hp_mute gpio\n");
+			return ret;
+		}
+		machine->gpio_requested |= GPIO_HP_MUTE;
+
+		gpio_direction_output(pdata->gpio_hp_mute, 0);
+	}
+
+	if (gpio_is_valid(pdata->gpio_int_mic_en)) {
+		ret = gpio_request(pdata->gpio_int_mic_en, "int_mic_en");
+		if (ret) {
+			dev_err(card->dev, "cannot get int_mic_en gpio\n");
+			return ret;
+		}
+		machine->gpio_requested |= GPIO_INT_MIC_EN;
+
+		/* Disable int mic; enable signal is active-high */
+		gpio_direction_output(pdata->gpio_int_mic_en, 0);
+	}
+
+	if (gpio_is_valid(pdata->gpio_ext_mic_en)) {
+		ret = gpio_request(pdata->gpio_ext_mic_en, "ext_mic_en");
+		if (ret) {
+			dev_err(card->dev, "cannot get ext_mic_en gpio\n");
+			return ret;
+		}
+		machine->gpio_requested |= GPIO_EXT_MIC_EN;
+
+		/* Enable ext mic; enable signal is active-low */
+		gpio_direction_output(pdata->gpio_ext_mic_en, 0);
+	}
+
+	ret = snd_soc_add_controls(codec, tegra_max98088_controls,
+				   ARRAY_SIZE(tegra_max98088_controls));
+	if (ret < 0)
+		return ret;
+
+	snd_soc_dapm_new_controls(dapm, tegra_max98088_dapm_widgets,
+					ARRAY_SIZE(tegra_max98088_dapm_widgets));
+
+	snd_soc_dapm_add_routes(dapm, enterprise_audio_map,
+					ARRAY_SIZE(enterprise_audio_map));
+
+	if (gpio_is_valid(pdata->gpio_hp_det)) {
+		tegra_max98088_hp_jack_gpio.gpio = pdata->gpio_hp_det;
+		snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
+				&tegra_max98088_hp_jack);
+		snd_soc_jack_add_pins(&tegra_max98088_hp_jack,
+					ARRAY_SIZE(tegra_max98088_hp_jack_pins),
+					tegra_max98088_hp_jack_pins);
+		snd_soc_jack_add_gpios(&tegra_max98088_hp_jack,
+					1,
+					&tegra_max98088_hp_jack_gpio);
+	}
+
+	snd_soc_dapm_nc_pin(dapm, "INA1");
+	snd_soc_dapm_nc_pin(dapm, "INA2");
+	snd_soc_dapm_nc_pin(dapm, "INAB1");
+	snd_soc_dapm_nc_pin(dapm, "INAB2");
+
+	snd_soc_dapm_sync(dapm);
+
+	return 0;
+}
+
+static struct snd_soc_dai_link tegra_max98088_dai = {
+	.name = "MAX98088",
+	.stream_name = "MAX98088 HIFI",
+	.codec_name = "max98088.0-0010",
+	.platform_name = "tegra-pcm-audio",
+	.cpu_dai_name = "tegra30-i2s.0",
+	.codec_dai_name = "HiFi",
+	.init = tegra_max98088_init,
+	.ops = &tegra_max98088_ops,
+};
+
+static struct snd_soc_card snd_soc_tegra_max98088 = {
+	.name = "tegra-max98088",
+	.dai_link = &tegra_max98088_dai,
+	.num_links = 1,
+};
+
+static __devinit int tegra_max98088_driver_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &snd_soc_tegra_max98088;
+	struct tegra_max98088 *machine;
+	struct tegra_max98088_platform_data *pdata;
+	int ret;
+
+	pdata = pdev->dev.platform_data;
+	if (!pdata) {
+		dev_err(&pdev->dev, "No platform data supplied\n");
+		return -EINVAL;
+	}
+
+	machine = kzalloc(sizeof(struct tegra_max98088), GFP_KERNEL);
+	if (!machine) {
+		dev_err(&pdev->dev, "Can't allocate tegra_max98088 struct\n");
+		return -ENOMEM;
+	}
+
+	machine->pdata = pdata;
+
+	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
+	if (ret)
+		goto err_free_machine;
+
+	card->dev = &pdev->dev;
+	platform_set_drvdata(pdev, card);
+	snd_soc_card_set_drvdata(card, machine);
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+			ret);
+		goto err_fini_utils;
+	}
+
+	return 0;
+
+err_fini_utils:
+	tegra_asoc_utils_fini(&machine->util_data);
+err_free_machine:
+	kfree(machine);
+	return ret;
+}
+
+static int __devexit tegra_max98088_driver_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
+	struct tegra_max98088_platform_data *pdata = machine->pdata;
+
+	snd_soc_unregister_card(card);
+
+	tegra_asoc_utils_fini(&machine->util_data);
+
+	if (machine->gpio_requested & GPIO_EXT_MIC_EN)
+		gpio_free(pdata->gpio_ext_mic_en);
+	if (machine->gpio_requested & GPIO_INT_MIC_EN)
+		gpio_free(pdata->gpio_int_mic_en);
+	if (machine->gpio_requested & GPIO_HP_MUTE)
+		gpio_free(pdata->gpio_hp_mute);
+	if (machine->gpio_requested & GPIO_SPKR_EN)
+		gpio_free(pdata->gpio_spkr_en);
+
+	kfree(machine);
+
+	return 0;
+}
+
+static struct platform_driver tegra_max98088_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = tegra_max98088_driver_probe,
+	.remove = __devexit_p(tegra_max98088_driver_remove),
+};
+
+static int __init tegra_max98088_modinit(void)
+{
+	return platform_driver_register(&tegra_max98088_driver);
+}
+module_init(tegra_max98088_modinit);
+
+static void __exit tegra_max98088_modexit(void)
+{
+	platform_driver_unregister(&tegra_max98088_driver);
+}
+module_exit(tegra_max98088_modexit);
+
+MODULE_AUTHOR("Sumit Bhattacharya <sumitb@nvidia.com>");
+MODULE_DESCRIPTION("Tegra+MAX98088 machine ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);