drivers/bluetooth/btfm_slim_codec.c - kernel/msm-4.9 - Gitiles

 /* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only 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.
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of_gpio.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/debugfs.h>
 #include <linux/slimbus/slimbus.h>
 #include <linux/ratelimit.h>
 #include <linux/slab.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 #include <sound/tlv.h>
 #include <btfm_slim.h>

 static int btfm_slim_codec_write(struct snd_soc_codec *codec, unsigned int reg,
 	unsigned int value)
 {
 	return 0;
 }

 static unsigned int btfm_slim_codec_read(struct snd_soc_codec *codec,
 				unsigned int reg)
 {
 	return 0;
 }

 static int btfm_slim_codec_probe(struct snd_soc_codec *codec)
 {
 	return 0;
 }

 static int btfm_slim_codec_remove(struct snd_soc_codec *codec)
 {
 	return 0;
 }

 static int btfm_slim_dai_startup(struct snd_pcm_substream *substream,
 		struct snd_soc_dai *dai)
 {
 	int ret;
 	struct btfmslim *btfmslim = dai->dev->platform_data;

 	BTFMSLIM_DBG("substream = %s  stream = %d",
 		 substream->name, substream->stream);
 	ret = btfm_slim_hw_init(btfmslim);
 	return ret;
 }

 static void btfm_slim_dai_shutdown(struct snd_pcm_substream *substream,
 		struct snd_soc_dai *dai)
 {
 	struct btfmslim *btfmslim = dai->dev->platform_data;

 	BTFMSLIM_DBG("substream = %s  stream = %d",
 		 substream->name, substream->stream);
 	btfm_slim_hw_deinit(btfmslim);
 }

 static int btfm_slim_dai_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params,
 			    struct snd_soc_dai *dai)
 {
 	BTFMSLIM_DBG("dai_name = %s DAI-ID %x rate %d num_ch %d",
 		dai->name, dai->id, params_rate(params),
 		params_channels(params));

 	return 0;
 }

 int btfm_slim_dai_prepare(struct snd_pcm_substream *substream,
 	struct snd_soc_dai *dai)
 {
 	int i, ret = -EINVAL;
 	struct btfmslim *btfmslim = dai->dev->platform_data;
 	struct btfmslim_ch *ch;
 	uint8_t rxport, grp = false, nchan = 1;

 	BTFMSLIM_DBG("dai->name:%s, dai->id: %d, dai->rate: %d", dai->name,
 		dai->id, dai->rate);

 	switch (dai->id) {
 	case BTFM_FM_SLIM_TX:
 		grp = true; nchan = 2;
 		ch = btfmslim->tx_chs;
 		rxport = 0;
 		break;
 	case BTFM_BT_SCO_SLIM_TX:
 		ch = btfmslim->tx_chs;
 		rxport = 0;
 		break;
 	case BTFM_BT_SCO_A2DP_SLIM_RX:
 	case BTFM_BT_SPLIT_A2DP_SLIM_RX:
 		ch = btfmslim->rx_chs;
 		rxport = 1;
 		break;
 	case BTFM_SLIM_NUM_CODEC_DAIS:
 	default:
 		BTFMSLIM_ERR("dai->id is invalid:%d", dai->id);
 		return ret;
 	}

 	/* Search for dai->id matched port handler */
 	for (i = 0; (i < BTFM_SLIM_NUM_CODEC_DAIS) &&
 		(ch->id != BTFM_SLIM_NUM_CODEC_DAIS) &&
 		(ch->id != dai->id); ch++, i++)
 		;

 	if ((ch->port == BTFM_SLIM_PGD_PORT_LAST) ||
 		(ch->id == BTFM_SLIM_NUM_CODEC_DAIS)) {
 		BTFMSLIM_ERR("ch is invalid!!");
 		return ret;
 	}

 	ret = btfm_slim_enable_ch(btfmslim, ch, rxport, dai->rate, grp, nchan);
 	return ret;
 }

 int btfm_slim_dai_hw_free(struct snd_pcm_substream *substream,
 	struct snd_soc_dai *dai)
 {
 	int i, ret = -EINVAL;
 	struct btfmslim *btfmslim = dai->dev->platform_data;
 	struct btfmslim_ch *ch;
 	uint8_t rxport, grp = false, nchan = 1;

 	BTFMSLIM_DBG("dai->name:%s, dai->id: %d, dai->rate: %d", dai->name,
 		dai->id, dai->rate);

 	switch (dai->id) {
 	case BTFM_FM_SLIM_TX:
 		grp = true; nchan = 2;
 		ch = btfmslim->tx_chs;
 		rxport = 0;
 		break;
 	case BTFM_BT_SCO_SLIM_TX:
 		ch = btfmslim->tx_chs;
 		rxport = 0;
 		break;
 	case BTFM_BT_SCO_A2DP_SLIM_RX:
 	case BTFM_BT_SPLIT_A2DP_SLIM_RX:
 		ch = btfmslim->rx_chs;
 		rxport = 1;
 		break;
 	case BTFM_SLIM_NUM_CODEC_DAIS:
 	default:
 		BTFMSLIM_ERR("dai->id is invalid:%d", dai->id);
 		return ret;
 	}

 	/* Search for dai->id matched port handler */
 	for (i = 0; (i < BTFM_SLIM_NUM_CODEC_DAIS) &&
 		(ch->id != BTFM_SLIM_NUM_CODEC_DAIS) &&
 		(ch->id != dai->id); ch++, i++)
 		;

 	if ((ch->port == BTFM_SLIM_PGD_PORT_LAST) ||
 		(ch->id == BTFM_SLIM_NUM_CODEC_DAIS)) {
 		BTFMSLIM_ERR("ch is invalid!!");
 		return ret;
 	}
 	ret = btfm_slim_disable_ch(btfmslim, ch, rxport, grp, nchan);
 	return ret;
 }

 /* This function will be called once during boot up */
 static int btfm_slim_dai_set_channel_map(struct snd_soc_dai *dai,
 				unsigned int tx_num, unsigned int *tx_slot,
 				unsigned int rx_num, unsigned int *rx_slot)
 {
 	int ret = -EINVAL, i;
 	struct btfmslim *btfmslim = dai->dev->platform_data;
 	struct btfmslim_ch *rx_chs;
 	struct btfmslim_ch *tx_chs;

 	BTFMSLIM_DBG("");

 	if (!btfmslim)
 		return ret;

 	rx_chs = btfmslim->rx_chs;
 	tx_chs = btfmslim->tx_chs;

 	if (!rx_chs || !tx_chs)
 		return ret;

 	BTFMSLIM_DBG("Rx: id\tname\tport\thdl\tch\tch_hdl");
 	for (i = 0; (rx_chs->port != BTFM_SLIM_PGD_PORT_LAST) && (i < rx_num);
 		i++, rx_chs++) {
 		/* Set Rx Channel number from machine driver and
 		 * get channel handler from slimbus driver
 		 */
 		rx_chs->ch = *(uint8_t *)(rx_slot + i);
 		ret = slim_query_ch(btfmslim->slim_pgd, rx_chs->ch,
 			&rx_chs->ch_hdl);
 		if (ret < 0) {
 			BTFMSLIM_ERR("slim_query_ch failure ch#%d - ret[%d]",
 				rx_chs->ch, ret);
 			goto error;
 		}
 		BTFMSLIM_DBG("    %d\t%s\t%d\t%x\t%d\t%x", rx_chs->id,
 			rx_chs->name, rx_chs->port, rx_chs->port_hdl,
 			rx_chs->ch, rx_chs->ch_hdl);
 	}

 	BTFMSLIM_DBG("Tx: id\tname\tport\thdl\tch\tch_hdl");
 	for (i = 0; (tx_chs->port != BTFM_SLIM_PGD_PORT_LAST) && (i < tx_num);
 		i++, tx_chs++) {
 		/* Set Tx Channel number from machine driver and
 		 * get channel handler from slimbus driver
 		 */
 		tx_chs->ch = *(uint8_t *)(tx_slot + i);
 		ret = slim_query_ch(btfmslim->slim_pgd, tx_chs->ch,
 			&tx_chs->ch_hdl);
 		if (ret < 0) {
 			BTFMSLIM_ERR("slim_query_ch failure ch#%d - ret[%d]",
 				tx_chs->ch, ret);
 			goto error;
 		}
 		BTFMSLIM_DBG("    %d\t%s\t%d\t%x\t%d\t%x", tx_chs->id,
 			tx_chs->name, tx_chs->port, tx_chs->port_hdl,
 			tx_chs->ch, tx_chs->ch_hdl);
 	}

 error:
 	return ret;
 }

 static int btfm_slim_dai_get_channel_map(struct snd_soc_dai *dai,
 				 unsigned int *tx_num, unsigned int *tx_slot,
 				 unsigned int *rx_num, unsigned int *rx_slot)
 {
 	int i, ret = -EINVAL, *slot = NULL, j = 0, num = 1;
 	struct btfmslim *btfmslim = dai->dev->platform_data;
 	struct btfmslim_ch *ch = NULL;

 	if (!btfmslim)
 		return ret;

 	switch (dai->id) {
 	case BTFM_FM_SLIM_TX:
 		num = 2;
 	case BTFM_BT_SCO_SLIM_TX:
 		if (!tx_slot || !tx_num) {
 			BTFMSLIM_ERR("Invalid tx_slot %p or tx_num %p",
 				tx_slot, tx_num);
 			return -EINVAL;
 		}
 		ch = btfmslim->tx_chs;
 		if (!ch)
 			return -EINVAL;
 		slot = tx_slot;
 		*rx_slot = 0;
 		*tx_num = num;
 		*rx_num = 0;
 		break;
 	case BTFM_BT_SCO_A2DP_SLIM_RX:
 	case BTFM_BT_SPLIT_A2DP_SLIM_RX:
 		if (!rx_slot || !rx_num) {
 			BTFMSLIM_ERR("Invalid rx_slot %p or rx_num %p",
 				 rx_slot, rx_num);
 			return -EINVAL;
 		}
 		ch = btfmslim->rx_chs;
 		if (!ch)
 			return -EINVAL;
 		slot = rx_slot;
 		*tx_slot = 0;
 		*tx_num = 0;
 		*rx_num = num;
 		break;
 	}

 	do {
 		if (!ch)
 			return -EINVAL;
 		for (i = 0; (i < BTFM_SLIM_NUM_CODEC_DAIS) && (ch->id !=
 			BTFM_SLIM_NUM_CODEC_DAIS) && (ch->id != dai->id);
 			ch++, i++)
 			;

 		if (ch->id == BTFM_SLIM_NUM_CODEC_DAIS ||
 			i == BTFM_SLIM_NUM_CODEC_DAIS) {
 			BTFMSLIM_ERR(
 				"No channel has been allocated for dai (%d)",
 				dai->id);
 			return -EINVAL;
 		}
 		if (!slot)
 			return -EINVAL;
 		*(slot + j) = ch->ch;
 		BTFMSLIM_DBG("id:%d, port:%d, ch:%d, slot: %d", ch->id,
 			ch->port, ch->ch, *(slot + j));

 		/* In case it has mulitiple channels */
 		if (++j < num)
 			ch++;
 	} while (j < num);

 	return 0;
 }

 static struct snd_soc_dai_ops btfmslim_dai_ops = {
 	.startup = btfm_slim_dai_startup,
 	.shutdown = btfm_slim_dai_shutdown,
 	.hw_params = btfm_slim_dai_hw_params,
 	.prepare = btfm_slim_dai_prepare,
 	.hw_free = btfm_slim_dai_hw_free,
 	.set_channel_map = btfm_slim_dai_set_channel_map,
 	.get_channel_map = btfm_slim_dai_get_channel_map,
 };

 static struct snd_soc_dai_driver btfmslim_dai[] = {
 	{	/* FM Audio data multiple channel  : FM -> qdsp */
 		.name = "btfm_fm_slim_tx",
 		.id = BTFM_FM_SLIM_TX,
 		.capture = {
 			.stream_name = "FM TX Capture",
 			.rates = SNDRV_PCM_RATE_48000, /* 48 KHz */
 			.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
 			.rate_max = 48000,
 			.rate_min = 48000,
 			.channels_min = 1,
 			.channels_max = 2,
 		},
 		.ops = &btfmslim_dai_ops,
 	},
 	{	/* Bluetooth SCO voice uplink: bt -> modem */
 		.name = "btfm_bt_sco_slim_tx",
 		.id = BTFM_BT_SCO_SLIM_TX,
 		.capture = {
 			.stream_name = "SCO TX Capture",
 			/* 8 KHz or 16 KHz */
 			.rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
 			.rate_max = 16000,
 			.rate_min = 8000,
 			.channels_min = 1,
 			.channels_max = 1,
 		},
 		.ops = &btfmslim_dai_ops,
 	},
 	{	/* Bluetooth SCO voice downlink: modem -> bt or A2DP Playback */
 		.name = "btfm_bt_sco_a2dp_slim_rx",
 		.id = BTFM_BT_SCO_A2DP_SLIM_RX,
 		.playback = {
 			.stream_name = "SCO A2DP RX Playback",
 			.rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000
 				| SNDRV_PCM_RATE_48000, /* 8 or 16 or 48 Khz*/
 			.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
 			.rate_max = 48000,
 			.rate_min = 8000,
 			.channels_min = 1,
 			.channels_max = 1,
 		},
 		.ops = &btfmslim_dai_ops,
 	},
 	{	/* Bluetooth Split A2DP data: qdsp -> bt */
 		.name = "btfm_bt_split_a2dp_slim_rx",
 		.id = BTFM_BT_SPLIT_A2DP_SLIM_RX,
 		.playback = {
 			.stream_name = "SPLIT A2DP Playback",
 			.rates = SNDRV_PCM_RATE_48000, /* 48 KHz */
 			.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
 			.rate_max = 48000,
 			.rate_min = 48000,
 			.channels_min = 1,
 			.channels_max = 1,
 		},
 		.ops = &btfmslim_dai_ops,
 	},
 };

 static struct snd_soc_codec_driver btfmslim_codec = {
 	.probe	= btfm_slim_codec_probe,
 	.remove	= btfm_slim_codec_remove,
 	.read		= btfm_slim_codec_read,
 	.write	= btfm_slim_codec_write,
 };

 int btfm_slim_register_codec(struct device *dev)
 {
 	int ret = 0;

 	BTFMSLIM_DBG("");
 	/* Register Codec driver */
 	ret = snd_soc_register_codec(dev, &btfmslim_codec,
 		btfmslim_dai, ARRAY_SIZE(btfmslim_dai));

 	if (ret)
 		BTFMSLIM_ERR("failed to register codec (%d)", ret);

 	return ret;
 }

 MODULE_DESCRIPTION("BTFM Slimbus Codec driver");
 MODULE_LICENSE("GPL v2");
	/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only 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.
	*/
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/of_gpio.h>
	#include <linux/delay.h>
	#include <linux/gpio.h>
	#include <linux/debugfs.h>
	#include <linux/slimbus/slimbus.h>
	#include <linux/ratelimit.h>
	#include <linux/slab.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/soc.h>
	#include <sound/soc-dapm.h>
	#include <sound/tlv.h>
	#include <btfm_slim.h>

	static int btfm_slim_codec_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int value)
	{
	return 0;
	}

	static unsigned int btfm_slim_codec_read(struct snd_soc_codec *codec,
	unsigned int reg)
	{
	return 0;
	}

	static int btfm_slim_codec_probe(struct snd_soc_codec *codec)
	{
	return 0;
	}

	static int btfm_slim_codec_remove(struct snd_soc_codec *codec)
	{
	return 0;
	}

	static int btfm_slim_dai_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	int ret;
	struct btfmslim *btfmslim = dai->dev->platform_data;

	BTFMSLIM_DBG("substream = %s stream = %d",
	substream->name, substream->stream);
	ret = btfm_slim_hw_init(btfmslim);
	return ret;
	}

	static void btfm_slim_dai_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct btfmslim *btfmslim = dai->dev->platform_data;

	BTFMSLIM_DBG("substream = %s stream = %d",
	substream->name, substream->stream);
	btfm_slim_hw_deinit(btfmslim);
	}

	static int btfm_slim_dai_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	BTFMSLIM_DBG("dai_name = %s DAI-ID %x rate %d num_ch %d",
	dai->name, dai->id, params_rate(params),
	params_channels(params));

	return 0;
	}

	int btfm_slim_dai_prepare(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	int i, ret = -EINVAL;
	struct btfmslim *btfmslim = dai->dev->platform_data;
	struct btfmslim_ch *ch;
	uint8_t rxport, grp = false, nchan = 1;

	BTFMSLIM_DBG("dai->name:%s, dai->id: %d, dai->rate: %d", dai->name,
	dai->id, dai->rate);

	switch (dai->id) {
	case BTFM_FM_SLIM_TX:
	grp = true; nchan = 2;
	ch = btfmslim->tx_chs;
	rxport = 0;
	break;
	case BTFM_BT_SCO_SLIM_TX:
	ch = btfmslim->tx_chs;
	rxport = 0;
	break;
	case BTFM_BT_SCO_A2DP_SLIM_RX:
	case BTFM_BT_SPLIT_A2DP_SLIM_RX:
	ch = btfmslim->rx_chs;
	rxport = 1;
	break;
	case BTFM_SLIM_NUM_CODEC_DAIS:
	default:
	BTFMSLIM_ERR("dai->id is invalid:%d", dai->id);
	return ret;
	}

	/* Search for dai->id matched port handler */
	for (i = 0; (i < BTFM_SLIM_NUM_CODEC_DAIS) &&
	(ch->id != BTFM_SLIM_NUM_CODEC_DAIS) &&
	(ch->id != dai->id); ch++, i++)
	;

	if ((ch->port == BTFM_SLIM_PGD_PORT_LAST) \|\|
	(ch->id == BTFM_SLIM_NUM_CODEC_DAIS)) {
	BTFMSLIM_ERR("ch is invalid!!");
	return ret;
	}

	ret = btfm_slim_enable_ch(btfmslim, ch, rxport, dai->rate, grp, nchan);
	return ret;
	}

	int btfm_slim_dai_hw_free(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	int i, ret = -EINVAL;
	struct btfmslim *btfmslim = dai->dev->platform_data;
	struct btfmslim_ch *ch;
	uint8_t rxport, grp = false, nchan = 1;

	BTFMSLIM_DBG("dai->name:%s, dai->id: %d, dai->rate: %d", dai->name,
	dai->id, dai->rate);

	switch (dai->id) {
	case BTFM_FM_SLIM_TX:
	grp = true; nchan = 2;
	ch = btfmslim->tx_chs;
	rxport = 0;
	break;
	case BTFM_BT_SCO_SLIM_TX:
	ch = btfmslim->tx_chs;
	rxport = 0;
	break;
	case BTFM_BT_SCO_A2DP_SLIM_RX:
	case BTFM_BT_SPLIT_A2DP_SLIM_RX:
	ch = btfmslim->rx_chs;
	rxport = 1;
	break;
	case BTFM_SLIM_NUM_CODEC_DAIS:
	default:
	BTFMSLIM_ERR("dai->id is invalid:%d", dai->id);
	return ret;
	}

	/* Search for dai->id matched port handler */
	for (i = 0; (i < BTFM_SLIM_NUM_CODEC_DAIS) &&
	(ch->id != BTFM_SLIM_NUM_CODEC_DAIS) &&
	(ch->id != dai->id); ch++, i++)
	;

	if ((ch->port == BTFM_SLIM_PGD_PORT_LAST) \|\|
	(ch->id == BTFM_SLIM_NUM_CODEC_DAIS)) {
	BTFMSLIM_ERR("ch is invalid!!");
	return ret;
	}
	ret = btfm_slim_disable_ch(btfmslim, ch, rxport, grp, nchan);
	return ret;
	}

	/* This function will be called once during boot up */
	static int btfm_slim_dai_set_channel_map(struct snd_soc_dai *dai,
	unsigned int tx_num, unsigned int *tx_slot,
	unsigned int rx_num, unsigned int *rx_slot)
	{
	int ret = -EINVAL, i;
	struct btfmslim *btfmslim = dai->dev->platform_data;
	struct btfmslim_ch *rx_chs;
	struct btfmslim_ch *tx_chs;

	BTFMSLIM_DBG("");

	if (!btfmslim)
	return ret;

	rx_chs = btfmslim->rx_chs;
	tx_chs = btfmslim->tx_chs;

	if (!rx_chs \|\| !tx_chs)
	return ret;

	BTFMSLIM_DBG("Rx: id\tname\tport\thdl\tch\tch_hdl");
	for (i = 0; (rx_chs->port != BTFM_SLIM_PGD_PORT_LAST) && (i < rx_num);
	i++, rx_chs++) {
	/* Set Rx Channel number from machine driver and
	* get channel handler from slimbus driver
	*/
	rx_chs->ch = (uint8_t )(rx_slot + i);
	ret = slim_query_ch(btfmslim->slim_pgd, rx_chs->ch,
	&rx_chs->ch_hdl);
	if (ret < 0) {
	BTFMSLIM_ERR("slim_query_ch failure ch#%d - ret[%d]",
	rx_chs->ch, ret);
	goto error;
	}
	BTFMSLIM_DBG(" %d\t%s\t%d\t%x\t%d\t%x", rx_chs->id,
	rx_chs->name, rx_chs->port, rx_chs->port_hdl,
	rx_chs->ch, rx_chs->ch_hdl);
	}

	BTFMSLIM_DBG("Tx: id\tname\tport\thdl\tch\tch_hdl");
	for (i = 0; (tx_chs->port != BTFM_SLIM_PGD_PORT_LAST) && (i < tx_num);
	i++, tx_chs++) {
	/* Set Tx Channel number from machine driver and
	* get channel handler from slimbus driver
	*/
	tx_chs->ch = (uint8_t )(tx_slot + i);
	ret = slim_query_ch(btfmslim->slim_pgd, tx_chs->ch,
	&tx_chs->ch_hdl);
	if (ret < 0) {
	BTFMSLIM_ERR("slim_query_ch failure ch#%d - ret[%d]",
	tx_chs->ch, ret);
	goto error;
	}
	BTFMSLIM_DBG(" %d\t%s\t%d\t%x\t%d\t%x", tx_chs->id,
	tx_chs->name, tx_chs->port, tx_chs->port_hdl,
	tx_chs->ch, tx_chs->ch_hdl);
	}

	error:
	return ret;
	}

	static int btfm_slim_dai_get_channel_map(struct snd_soc_dai *dai,
	unsigned int tx_num, unsigned int tx_slot,
	unsigned int rx_num, unsigned int rx_slot)
	{
	int i, ret = -EINVAL, *slot = NULL, j = 0, num = 1;
	struct btfmslim *btfmslim = dai->dev->platform_data;
	struct btfmslim_ch *ch = NULL;

	if (!btfmslim)
	return ret;

	switch (dai->id) {
	case BTFM_FM_SLIM_TX:
	num = 2;
	case BTFM_BT_SCO_SLIM_TX:
	if (!tx_slot \|\| !tx_num) {
	BTFMSLIM_ERR("Invalid tx_slot %p or tx_num %p",
	tx_slot, tx_num);
	return -EINVAL;
	}
	ch = btfmslim->tx_chs;
	if (!ch)
	return -EINVAL;
	slot = tx_slot;
	*rx_slot = 0;
	*tx_num = num;
	*rx_num = 0;
	break;
	case BTFM_BT_SCO_A2DP_SLIM_RX:
	case BTFM_BT_SPLIT_A2DP_SLIM_RX:
	if (!rx_slot \|\| !rx_num) {
	BTFMSLIM_ERR("Invalid rx_slot %p or rx_num %p",
	rx_slot, rx_num);
	return -EINVAL;
	}
	ch = btfmslim->rx_chs;
	if (!ch)
	return -EINVAL;
	slot = rx_slot;
	*tx_slot = 0;
	*tx_num = 0;
	*rx_num = num;
	break;
	}

	do {
	if (!ch)
	return -EINVAL;
	for (i = 0; (i < BTFM_SLIM_NUM_CODEC_DAIS) && (ch->id !=
	BTFM_SLIM_NUM_CODEC_DAIS) && (ch->id != dai->id);
	ch++, i++)
	;

	if (ch->id == BTFM_SLIM_NUM_CODEC_DAIS \|\|
	i == BTFM_SLIM_NUM_CODEC_DAIS) {
	BTFMSLIM_ERR(
	"No channel has been allocated for dai (%d)",
	dai->id);
	return -EINVAL;
	}
	if (!slot)
	return -EINVAL;
	*(slot + j) = ch->ch;
	BTFMSLIM_DBG("id:%d, port:%d, ch:%d, slot: %d", ch->id,
	ch->port, ch->ch, *(slot + j));

	/* In case it has mulitiple channels */
	if (++j < num)
	ch++;
	} while (j < num);

	return 0;
	}

	static struct snd_soc_dai_ops btfmslim_dai_ops = {
	.startup = btfm_slim_dai_startup,
	.shutdown = btfm_slim_dai_shutdown,
	.hw_params = btfm_slim_dai_hw_params,
	.prepare = btfm_slim_dai_prepare,
	.hw_free = btfm_slim_dai_hw_free,
	.set_channel_map = btfm_slim_dai_set_channel_map,
	.get_channel_map = btfm_slim_dai_get_channel_map,
	};

	static struct snd_soc_dai_driver btfmslim_dai[] = {
	{ /* FM Audio data multiple channel : FM -> qdsp */
	.name = "btfm_fm_slim_tx",
	.id = BTFM_FM_SLIM_TX,
	.capture = {
	.stream_name = "FM TX Capture",
	.rates = SNDRV_PCM_RATE_48000, /* 48 KHz */
	.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
	.rate_max = 48000,
	.rate_min = 48000,
	.channels_min = 1,
	.channels_max = 2,
	},
	.ops = &btfmslim_dai_ops,
	},
	{ /* Bluetooth SCO voice uplink: bt -> modem */
	.name = "btfm_bt_sco_slim_tx",
	.id = BTFM_BT_SCO_SLIM_TX,
	.capture = {
	.stream_name = "SCO TX Capture",
	/* 8 KHz or 16 KHz */
	.rates = SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_16000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
	.rate_max = 16000,
	.rate_min = 8000,
	.channels_min = 1,
	.channels_max = 1,
	},
	.ops = &btfmslim_dai_ops,
	},
	{ /* Bluetooth SCO voice downlink: modem -> bt or A2DP Playback */
	.name = "btfm_bt_sco_a2dp_slim_rx",
	.id = BTFM_BT_SCO_A2DP_SLIM_RX,
	.playback = {
	.stream_name = "SCO A2DP RX Playback",
	.rates = SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_16000
	\| SNDRV_PCM_RATE_48000, /* 8 or 16 or 48 Khz*/
	.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
	.rate_max = 48000,
	.rate_min = 8000,
	.channels_min = 1,
	.channels_max = 1,
	},
	.ops = &btfmslim_dai_ops,
	},
	{ /* Bluetooth Split A2DP data: qdsp -> bt */
	.name = "btfm_bt_split_a2dp_slim_rx",
	.id = BTFM_BT_SPLIT_A2DP_SLIM_RX,
	.playback = {
	.stream_name = "SPLIT A2DP Playback",
	.rates = SNDRV_PCM_RATE_48000, /* 48 KHz */
	.formats = SNDRV_PCM_FMTBIT_S16_LE, /* 16 bits */
	.rate_max = 48000,
	.rate_min = 48000,
	.channels_min = 1,
	.channels_max = 1,
	},
	.ops = &btfmslim_dai_ops,
	},
	};

	static struct snd_soc_codec_driver btfmslim_codec = {
	.probe = btfm_slim_codec_probe,
	.remove = btfm_slim_codec_remove,
	.read = btfm_slim_codec_read,
	.write = btfm_slim_codec_write,
	};

	int btfm_slim_register_codec(struct device *dev)
	{
	int ret = 0;

	BTFMSLIM_DBG("");
	/* Register Codec driver */
	ret = snd_soc_register_codec(dev, &btfmslim_codec,
	btfmslim_dai, ARRAY_SIZE(btfmslim_dai));

	if (ret)
	BTFMSLIM_ERR("failed to register codec (%d)", ret);

	return ret;
	}

	MODULE_DESCRIPTION("BTFM Slimbus Codec driver");
	MODULE_LICENSE("GPL v2");