path: root/sound/soc/tegra/tegra_max98088.c

/*
 * 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>
#ifdef CONFIG_SWITCH
#include <linux/switch.h>
#endif

#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"
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
#include "tegra30_ahub.h"
#include "tegra30_i2s.h"
#include "tegra30_dam.h"
#endif

#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)

#define DAI_LINK_HIFI		0
#define DAI_LINK_SPDIF		1
#define DAI_LINK_BTSCO		2
#define DAI_LINK_VOICE_CALL	3
#define DAI_LINK_BT_VOICE_CALL	4
#define NUM_DAI_LINKS	5

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
const char *tegra_max98088_i2s_dai_name[TEGRA30_NR_I2S_IFC] = {
	"tegra30-i2s.0",
	"tegra30-i2s.1",
	"tegra30-i2s.2",
	"tegra30-i2s.3",
	"tegra30-i2s.4",
};
#endif

struct tegra_max98088 {
	struct tegra_asoc_utils_data util_data;
	struct tegra_max98088_platform_data *pdata;
	int gpio_requested;
	bool init_done;
	int is_call_mode;
	int is_device_bt;
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	struct codec_config codec_info[NUM_I2S_DEVICES];
#endif
	enum snd_soc_bias_level bias_level;
	struct snd_soc_card *pcard;
};

static int tegra_call_mode_info(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int tegra_call_mode_get(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct tegra_max98088 *machine = snd_kcontrol_chip(kcontrol);

	ucontrol->value.integer.value[0] = machine->is_call_mode;

	return 0;
}

static int tegra_call_mode_put(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct tegra_max98088 *machine = snd_kcontrol_chip(kcontrol);
	int is_call_mode_new = ucontrol->value.integer.value[0];
	int codec_index;
	unsigned int i;

	if (machine->is_call_mode == is_call_mode_new)
		return 0;

	if (machine->is_device_bt)
		codec_index = BT_SCO;
	else
		codec_index = HIFI_CODEC;

	if (is_call_mode_new) {
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
		if (machine->codec_info[codec_index].rate == 0 ||
			machine->codec_info[codec_index].channels == 0)
				return -EINVAL;

		for (i = 0; i < machine->pcard->num_links; i++)
			machine->pcard->dai_link[i].ignore_suspend = 1;

		tegra30_make_voice_call_connections(
			&machine->codec_info[codec_index],
			&machine->codec_info[BASEBAND]);
#endif
	} else {
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
		tegra30_break_voice_call_connections(
			&machine->codec_info[codec_index],
			&machine->codec_info[BASEBAND]);

		for (i = 0; i < machine->pcard->num_links; i++)
			machine->pcard->dai_link[i].ignore_suspend = 0;
#endif
	}

	machine->is_call_mode = is_call_mode_new;

	return 1;
}

struct snd_kcontrol_new tegra_call_mode_control = {
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Call Mode Switch",
	.private_value = 0xffff,
	.info = tegra_call_mode_info,
	.get = tegra_call_mode_get,
	.put = tegra_call_mode_put
};

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
static int tegra_max98088_set_dam_cif(int dam_ifc, int srate,
			int channels, int bit_size, int src_on, int src_srate,
			int src_channels, int src_bit_size)
{
	tegra30_dam_set_gain(dam_ifc, TEGRA30_DAM_CHIN1, 0x1000);
	tegra30_dam_set_samplerate(dam_ifc, TEGRA30_DAM_CHOUT,
				srate);
	tegra30_dam_set_samplerate(dam_ifc, TEGRA30_DAM_CHIN1,
				srate);
	tegra30_dam_set_acif(dam_ifc, TEGRA30_DAM_CHIN1,
		channels, bit_size, channels,
				bit_size);
	tegra30_dam_set_acif(dam_ifc, TEGRA30_DAM_CHOUT,
		channels, bit_size, channels,
				bit_size);

	if (src_on) {
		tegra30_dam_set_gain(dam_ifc, TEGRA30_DAM_CHIN0_SRC, 0x1000);
		tegra30_dam_set_samplerate(dam_ifc, TEGRA30_DAM_CHIN0_SRC,
			src_srate);
		tegra30_dam_set_acif(dam_ifc, TEGRA30_DAM_CHIN0_SRC,
			src_channels, src_bit_size, 1, 16);
	}

	return 0;
}
#endif

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);
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(cpu_dai);
#endif
	int srate, mclk, sample_size;
	int err;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		sample_size = 16;
		break;
	default:
		return -EINVAL;
	}

	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) {
		if (!(machine->util_data.set_mclk % mclk))
			mclk = machine->util_data.set_mclk;
		else {
			dev_err(card->dev, "Can't configure clocks\n");
			return err;
		}
	}

	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);

	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;
	}

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		tegra_max98088_set_dam_cif(i2s->dam_ifc, srate,
			params_channels(params), sample_size, 0, 0, 0, 0);
#endif

	return 0;
}

static int tegra_spdif_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_card *card = rtd->card;
	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
	int srate, mclk, min_mclk;
	int err;

	srate = params_rate(params);
	switch (srate) {
	case 11025:
	case 22050:
	case 44100:
	case 88200:
		mclk = 11289600;
		break;
	case 8000:
	case 16000:
	case 32000:
	case 48000:
	case 64000:
	case 96000:
		mclk = 12288000;
		break;
	default:
		return -EINVAL;
	}
	min_mclk = 128 * srate;

	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
	if (err < 0) {
		if (!(machine->util_data.set_mclk % min_mclk))
			mclk = machine->util_data.set_mclk;
		else {
			dev_err(card->dev, "Can't configure clocks\n");
			return err;
		}
	}

	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);

	return 0;
}

static int tegra_bt_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(rtd->cpu_dai);
#endif
	struct snd_soc_card *card = rtd->card;
	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
	int err, srate, mclk, min_mclk, sample_size;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		sample_size = 16;
		break;
	default:
		return -EINVAL;
	}

	srate = params_rate(params);
	switch (srate) {
	case 11025:
	case 22050:
	case 44100:
	case 88200:
		mclk = 11289600;
		break;
	case 8000:
	case 16000:
	case 32000:
	case 48000:
	case 64000:
	case 96000:
		mclk = 12288000;
		break;
	default:
		return -EINVAL;
	}
	min_mclk = 64 * srate;

	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
	if (err < 0) {
		if (!(machine->util_data.set_mclk % min_mclk))
			mclk = machine->util_data.set_mclk;
		else {
			dev_err(card->dev, "Can't configure clocks\n");
			return err;
		}
	}

	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);

	err = snd_soc_dai_set_fmt(rtd->cpu_dai,
			SND_SOC_DAIFMT_DSP_A |
			SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_CBS_CFS);
	if (err < 0) {
		dev_err(rtd->codec->card->dev, "cpu_dai fmt not set\n");
		return err;
	}

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		tegra_max98088_set_dam_cif(i2s->dam_ifc, params_rate(params),
			params_channels(params), sample_size, 0, 0, 0, 0);
#endif

	return 0;
}

static int tegra_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(rtd->card);

	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 0);

	return 0;
}

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
static int tegra_max98088_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(cpu_dai);
	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(rtd->card);
	struct codec_config *codec_info;
	struct codec_config *bb_info;
	int codec_index;

	if (!i2s->is_dam_used)
		return 0;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/*dam configuration*/
		if (!i2s->dam_ch_refcount)
			i2s->dam_ifc = tegra30_dam_allocate_controller();

		tegra30_dam_allocate_channel(i2s->dam_ifc, TEGRA30_DAM_CHIN1);
		i2s->dam_ch_refcount++;
		tegra30_dam_enable_clock(i2s->dam_ifc);

		tegra30_ahub_set_rx_cif_source(TEGRA30_AHUB_RXCIF_DAM0_RX1 +
				(i2s->dam_ifc*2), i2s->txcif);

		/*
		*make the dam tx to i2s rx connection if this is the only client
		*using i2s for playback
		*/
		if (i2s->playback_ref_count == 1)
			tegra30_ahub_set_rx_cif_source(
				TEGRA30_AHUB_RXCIF_I2S0_RX0 + i2s->id,
				TEGRA30_AHUB_TXCIF_DAM0_TX0 + i2s->dam_ifc);

		/* enable the dam*/
		tegra30_dam_enable(i2s->dam_ifc, TEGRA30_DAM_ENABLE,
				TEGRA30_DAM_CHIN1);
	} else {

		i2s->is_call_mode_rec = machine->is_call_mode;

		if (!i2s->is_call_mode_rec)
			return 0;

		if (machine->is_device_bt)
			codec_index = BT_SCO;
		else
			codec_index = HIFI_CODEC;

		codec_info = &machine->codec_info[codec_index];
		bb_info = &machine->codec_info[BASEBAND];

		/* allocate a dam for voice call recording */

		i2s->call_record_dam_ifc = tegra30_dam_allocate_controller();
		tegra30_dam_allocate_channel(i2s->call_record_dam_ifc,
			TEGRA30_DAM_CHIN0_SRC);
		tegra30_dam_allocate_channel(i2s->call_record_dam_ifc,
			TEGRA30_DAM_CHIN1);
		tegra30_dam_enable_clock(i2s->call_record_dam_ifc);

		/* configure the dam */
		tegra_max98088_set_dam_cif(i2s->call_record_dam_ifc,
			codec_info->rate, codec_info->channels,
			codec_info->bitsize, 1, bb_info->rate,
			bb_info->channels, bb_info->bitsize);

		/* setup the connections for voice call record */

		tegra30_ahub_unset_rx_cif_source(i2s->rxcif);
		tegra30_ahub_set_rx_cif_source(TEGRA30_AHUB_RXCIF_DAM0_RX0 +
			(i2s->call_record_dam_ifc*2),
			TEGRA30_AHUB_TXCIF_I2S0_TX0 + bb_info->i2s_id);
		tegra30_ahub_set_rx_cif_source(TEGRA30_AHUB_RXCIF_DAM0_RX1 +
			(i2s->call_record_dam_ifc*2),
			TEGRA30_AHUB_TXCIF_I2S0_TX0 + codec_info->i2s_id);
		tegra30_ahub_set_rx_cif_source(i2s->rxcif,
			TEGRA30_AHUB_TXCIF_DAM0_TX0 + i2s->call_record_dam_ifc);

		/* enable the dam*/

		tegra30_dam_enable(i2s->call_record_dam_ifc, TEGRA30_DAM_ENABLE,
				TEGRA30_DAM_CHIN1);
		tegra30_dam_enable(i2s->call_record_dam_ifc, TEGRA30_DAM_ENABLE,
				TEGRA30_DAM_CHIN0_SRC);
	}

	return 0;
}

static void tegra_max98088_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(cpu_dai);

	if (!i2s->is_dam_used)
		return;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* disable the dam*/
		tegra30_dam_enable(i2s->dam_ifc, TEGRA30_DAM_DISABLE,
				TEGRA30_DAM_CHIN1);

		/* disconnect the ahub connections*/
		tegra30_ahub_unset_rx_cif_source(TEGRA30_AHUB_RXCIF_DAM0_RX1 +
					(i2s->dam_ifc*2));

		/* disable the dam and free the controller */
		tegra30_dam_disable_clock(i2s->dam_ifc);
		tegra30_dam_free_channel(i2s->dam_ifc, TEGRA30_DAM_CHIN1);
		i2s->dam_ch_refcount--;
		if (!i2s->dam_ch_refcount)
			tegra30_dam_free_controller(i2s->dam_ifc);
	 } else {

		if (!i2s->is_call_mode_rec)
			return 0;

		i2s->is_call_mode_rec = 0;

		/* disable the dam*/
		tegra30_dam_enable(i2s->call_record_dam_ifc,
			TEGRA30_DAM_DISABLE, TEGRA30_DAM_CHIN1);
		tegra30_dam_enable(i2s->call_record_dam_ifc,
			TEGRA30_DAM_DISABLE, TEGRA30_DAM_CHIN0_SRC);

		/* disconnect the ahub connections*/
		tegra30_ahub_unset_rx_cif_source(i2s->rxcif);
		tegra30_ahub_unset_rx_cif_source(TEGRA30_AHUB_RXCIF_DAM0_RX0 +
			(i2s->call_record_dam_ifc*2));
		tegra30_ahub_unset_rx_cif_source(TEGRA30_AHUB_RXCIF_DAM0_RX1 +
			(i2s->call_record_dam_ifc*2));

		/* free the dam channels and dam controller */
		tegra30_dam_disable_clock(i2s->call_record_dam_ifc);
		tegra30_dam_free_channel(i2s->call_record_dam_ifc,
			TEGRA30_DAM_CHIN1);
		tegra30_dam_free_channel(i2s->call_record_dam_ifc,
			TEGRA30_DAM_CHIN0_SRC);
		tegra30_dam_free_controller(i2s->call_record_dam_ifc);
	 }

	return;
}
#endif

static int tegra_voice_call_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_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:
		return -EINVAL;
		break;
	}

	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
	if (err < 0) {
		if (!(machine->util_data.set_mclk % mclk))
			mclk = machine->util_data.set_mclk;
		else {
			dev_err(card->dev, "Can't configure clocks\n");
			return err;
		}
	}

	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);

	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_sysclk(codec_dai, 0, mclk,
					SND_SOC_CLOCK_IN);
	if (err < 0) {
		dev_err(card->dev, "codec_dai clock not set\n");
		return err;
	}

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	/* codec configuration */
	machine->codec_info[HIFI_CODEC].rate = params_rate(params);
	machine->codec_info[HIFI_CODEC].channels = params_channels(params);
	machine->codec_info[HIFI_CODEC].bitsize = 16;
	machine->codec_info[HIFI_CODEC].is_i2smaster = 1;
	machine->codec_info[HIFI_CODEC].is_format_dsp = 0;

	/* baseband configuration */
	machine->codec_info[BASEBAND].bitsize = 16;
	machine->codec_info[BASEBAND].is_i2smaster = 1;
	machine->codec_info[BASEBAND].is_format_dsp = 1;
#endif

	machine->is_device_bt = 0;

	return 0;
}

static void tegra_voice_call_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct tegra_max98088 *machine  =
			snd_soc_card_get_drvdata(rtd->codec->card);

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	machine->codec_info[HIFI_CODEC].rate = 0;
	machine->codec_info[HIFI_CODEC].channels = 0;
#endif

	return;
}

static int tegra_bt_voice_call_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_card *card = rtd->card;
	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
	int err, srate, mclk, min_mclk;

	srate = params_rate(params);
	switch (srate) {
	case 11025:
	case 22050:
	case 44100:
	case 88200:
		mclk = 11289600;
		break;
	case 8000:
	case 16000:
	case 32000:
	case 48000:
	case 64000:
	case 96000:
		mclk = 12288000;
		break;
	default:
		return -EINVAL;
	}
	min_mclk = 64 * srate;

	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
	if (err < 0) {
		if (!(machine->util_data.set_mclk % min_mclk))
			mclk = machine->util_data.set_mclk;
		else {
			dev_err(card->dev, "Can't configure clocks\n");
			return err;
		}
	}

	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	/* codec configuration */
	machine->codec_info[BT_SCO].rate = params_rate(params);
	machine->codec_info[BT_SCO].channels = params_channels(params);
	machine->codec_info[BT_SCO].bitsize = 16;
	machine->codec_info[BT_SCO].is_i2smaster = 1;
	machine->codec_info[BT_SCO].is_format_dsp = 1;

	/* baseband configuration */
	machine->codec_info[BASEBAND].bitsize = 16;
	machine->codec_info[BASEBAND].is_i2smaster = 1;
	machine->codec_info[BASEBAND].is_format_dsp = 1;
#endif

	machine->is_device_bt = 1;

	return 0;
}

static void tegra_bt_voice_call_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct tegra_max98088 *machine  =
			snd_soc_card_get_drvdata(rtd->codec->card);

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	machine->codec_info[BT_SCO].rate = 0;
	machine->codec_info[BT_SCO].channels = 0;
#endif

	return;
}

static struct snd_soc_ops tegra_max98088_ops = {
	.hw_params = tegra_max98088_hw_params,
	.hw_free = tegra_hw_free,
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	.startup = tegra_max98088_startup,
	.shutdown = tegra_max98088_shutdown,
#endif
};

static struct snd_soc_ops tegra_spdif_ops = {
	.hw_params = tegra_spdif_hw_params,
	.hw_free = tegra_hw_free,
};

static struct snd_soc_ops tegra_voice_call_ops = {
	.hw_params = tegra_voice_call_hw_params,
	.shutdown = tegra_voice_call_shutdown,
	.hw_free = tegra_hw_free,
};

static struct snd_soc_ops tegra_bt_voice_call_ops = {
	.hw_params = tegra_bt_voice_call_hw_params,
	.shutdown = tegra_bt_voice_call_shutdown,
	.hw_free = tegra_hw_free,
};

static struct snd_soc_ops tegra_bt_ops = {
	.hw_params = tegra_bt_hw_params,
	.hw_free = tegra_hw_free,
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	.startup = tegra_max98088_startup,
	.shutdown = tegra_max98088_shutdown,
#endif
};

static struct snd_soc_jack tegra_max98088_hp_jack;

#ifdef CONFIG_SWITCH
static struct switch_dev wired_switch_dev = {
	.name = "h2w",
};

/* These values are copied from WiredAccessoryObserver */
enum headset_state {
	BIT_NO_HEADSET = 0,
	BIT_HEADSET = (1 << 0),
	BIT_HEADSET_NO_MIC = (1 << 1),
};

static int headset_switch_notify(struct notifier_block *self,
	unsigned long action, void *dev)
{
	int state = 0;

	switch (action) {
	case SND_JACK_HEADPHONE:
		state |= BIT_HEADSET_NO_MIC;
		break;
	case SND_JACK_HEADSET:
		state |= BIT_HEADSET;
		break;
	default:
		state |= BIT_NO_HEADSET;
	}

	switch_set_state(&wired_switch_dev, state);

	return NOTIFY_OK;
}

static struct notifier_block headset_switch_nb = {
	.notifier_call = headset_switch_notify,
};
#else
static struct snd_soc_jack_pin tegra_max98088_hp_jack_pins[] = {
	{
		.pin = "Headphone Jack",
		.mask = SND_JACK_HEADPHONE,
	},
};
#endif

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;
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(rtd->cpu_dai);
#endif
	int ret;

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	if (machine->codec_info[BASEBAND].i2s_id != -1)
		i2s->is_dam_used = true;
#endif

	if (machine->init_done)
		return 0;

	machine->init_done = true;

	machine->pcard = card;

	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));

	ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
			&tegra_max98088_hp_jack);
	if (ret < 0)
		return ret;

#ifdef CONFIG_SWITCH
	snd_soc_jack_notifier_register(&tegra_max98088_hp_jack,
		&headset_switch_nb);
#else /*gpio based headset detection*/
	snd_soc_jack_add_pins(&tegra_max98088_hp_jack,
		ARRAY_SIZE(tegra_max98088_hp_jack_pins),
		tegra_max98088_hp_jack_pins);
#endif

	max98088_headset_detect(codec, &tegra_max98088_hp_jack,
		SND_JACK_HEADSET);

       /* Add call mode switch control */
	ret = snd_ctl_add(codec->card->snd_card,
			snd_ctl_new1(&tegra_call_mode_control, machine));
	if (ret < 0)
		return ret;

	snd_soc_dapm_nc_pin(dapm, "INA1");
	snd_soc_dapm_nc_pin(dapm, "INA2");
	snd_soc_dapm_nc_pin(dapm, "INB1");
	snd_soc_dapm_nc_pin(dapm, "INB2");
	snd_soc_dapm_sync(dapm);

	return 0;
}

static struct snd_soc_dai_link tegra_max98088_dai[NUM_DAI_LINKS] = {
	[DAI_LINK_HIFI] = {
			.name = "MAX98088",
			.stream_name = "MAX98088 HIFI",
			.codec_name = "max98088.0-0010",
			.platform_name = "tegra-pcm-audio",
			.codec_dai_name = "HiFi",
			.init = tegra_max98088_init,
			.ops = &tegra_max98088_ops,
		},
	[DAI_LINK_SPDIF] = {
			.name = "SPDIF",
			.stream_name = "SPDIF PCM",
			.codec_name = "spdif-dit.0",
			.platform_name = "tegra-pcm-audio",
			.cpu_dai_name = "tegra30-spdif",
			.codec_dai_name = "dit-hifi",
			.ops = &tegra_spdif_ops,
		},
	[DAI_LINK_BTSCO] = {
			.name = "BT SCO",
			.stream_name = "BT SCO PCM",
			.codec_name = "spdif-dit.1",
			.platform_name = "tegra-pcm-audio",
			.codec_dai_name = "dit-hifi",
			.init = tegra_max98088_init,
			.ops = &tegra_bt_ops,
		},
	[DAI_LINK_VOICE_CALL] = {
			.name = "VOICE CALL",
			.stream_name = "VOICE CALL PCM",
			.codec_name = "max98088.0-0010",
			.platform_name = "tegra-pcm-audio",
			.cpu_dai_name = "dit-hifi",
			.codec_dai_name = "HiFi",
			.ops = &tegra_voice_call_ops,
		},
	[DAI_LINK_BT_VOICE_CALL] = {
			.name = "BT VOICE CALL",
			.stream_name = "BT VOICE CALL PCM",
			.codec_name = "spdif-dit.2",
			.platform_name = "tegra-pcm-audio",
			.cpu_dai_name = "dit-hifi",
			.codec_dai_name = "dit-hifi",
			.ops = &tegra_bt_voice_call_ops,
		},
};

static int tegra30_soc_set_bias_level(struct snd_soc_card *card,
					enum snd_soc_bias_level level)
{
	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);

	if (machine->bias_level == SND_SOC_BIAS_OFF &&
		level != SND_SOC_BIAS_OFF)
		tegra_asoc_utils_clk_enable(&machine->util_data);

	return 0;
}

static int tegra30_soc_set_bias_level_post(struct snd_soc_card *card,
					enum snd_soc_bias_level level)
{
	struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);

	if (machine->bias_level != SND_SOC_BIAS_OFF &&
		level == SND_SOC_BIAS_OFF)
		tegra_asoc_utils_clk_disable(&machine->util_data);

	machine->bias_level = level;

	return 0 ;
}

static struct snd_soc_card snd_soc_tegra_max98088 = {
	.name = "tegra-max98088",
	.dai_link = tegra_max98088_dai,
	.num_links = ARRAY_SIZE(tegra_max98088_dai),
	.set_bias_level = tegra30_soc_set_bias_level,
	.set_bias_level_post = tegra30_soc_set_bias_level_post,
};

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, i;

	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);

#ifdef CONFIG_SWITCH
	/* Add h2w switch class support */
	ret = switch_dev_register(&wired_switch_dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "not able to register switch device\n");
		goto err_fini_utils;
	}
#endif

#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	for (i = 0; i < NUM_I2S_DEVICES ; i++)
		machine->codec_info[i].i2s_id = pdata->audio_port_id[i];

	machine->codec_info[BASEBAND].rate = pdata->baseband_param.rate;
	machine->codec_info[BASEBAND].channels = pdata->baseband_param.channels;

	tegra_max98088_dai[DAI_LINK_HIFI].cpu_dai_name =
	tegra_max98088_i2s_dai_name[machine->codec_info[HIFI_CODEC].i2s_id];

	tegra_max98088_dai[DAI_LINK_BTSCO].cpu_dai_name =
	tegra_max98088_i2s_dai_name[machine->codec_info[BT_SCO].i2s_id];
#endif

	ret = snd_soc_register_card(card);
	if (ret) {
		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
			ret);
		goto err_switch_unregister;
	}

	return 0;

err_switch_unregister:
#ifdef CONFIG_SWITCH
	switch_dev_unregister(&wired_switch_dev);
#endif
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);

#ifdef CONFIG_SWITCH
	switch_dev_unregister(&wired_switch_dev);
#endif

	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);