drivers/mfd/wcd9xxx-slimslave.c - fp2-dev/kernel/msm - Gitiles

 /* Copyright (c) 2012-2013, 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/slab.h>
 #include <linux/mutex.h>
 #include <linux/mfd/wcd9xxx/wcd9xxx-slimslave.h>
 #include <linux/mfd/wcd9xxx/wcd9xxx_registers.h>

 struct wcd9xxx_slim_sch {
 	u16 rx_port_ch_reg_base;
 	u16 port_tx_cfg_reg_base;
 	u16 port_rx_cfg_reg_base;
 };

 static struct wcd9xxx_slim_sch sh_ch;

 static int wcd9xxx_alloc_slim_sh_ch(struct wcd9xxx *wcd9xxx,
 				    u8 wcd9xxx_pgd_la, u32 cnt,
 				    struct wcd9xxx_ch *channels, u32 path);

 static int wcd9xxx_dealloc_slim_sh_ch(struct slim_device *slim,
 				      u32 cnt, struct wcd9xxx_ch *channels);

 static int wcd9xxx_configure_ports(struct wcd9xxx *wcd9xxx)
 {
 	if (wcd9xxx->codec_type->slim_slave_type ==
 	    WCD9XXX_SLIM_SLAVE_ADDR_TYPE_TABLA) {
 		sh_ch.rx_port_ch_reg_base = 0x180;
 		sh_ch.port_rx_cfg_reg_base = 0x040;
 		sh_ch.port_tx_cfg_reg_base = 0x040;
 	} else {
 		sh_ch.rx_port_ch_reg_base =
 			0x180 - (TAIKO_SB_PGD_OFFSET_OF_RX_SLAVE_DEV_PORTS * 4);
 		sh_ch.port_rx_cfg_reg_base =
 			0x040 - TAIKO_SB_PGD_OFFSET_OF_RX_SLAVE_DEV_PORTS;
 		sh_ch.port_tx_cfg_reg_base = 0x050;
 	}

 	return 0;
 }


 int wcd9xxx_init_slimslave(struct wcd9xxx *wcd9xxx, u8 wcd9xxx_pgd_la,
 			   unsigned int tx_num, unsigned int *tx_slot,
 			   unsigned int rx_num, unsigned int *rx_slot)
 {
 	int ret = 0;
 	int i;

 	ret = wcd9xxx_configure_ports(wcd9xxx);
 	if (ret) {
 		pr_err("%s: Failed to configure register address offset\n",
 		       __func__);
 		goto err;
 	}

 	if (wcd9xxx->rx_chs) {
 		wcd9xxx->num_rx_port = rx_num;
 		for (i = 0; i < rx_num; i++) {
 			wcd9xxx->rx_chs[i].ch_num = rx_slot[i];
 			INIT_LIST_HEAD(&wcd9xxx->rx_chs[i].list);
 		}
 		ret = wcd9xxx_alloc_slim_sh_ch(wcd9xxx, wcd9xxx_pgd_la,
 						wcd9xxx->num_rx_port,
 						wcd9xxx->rx_chs,
 						SLIM_SINK);
 		if (ret) {
 			pr_err("%s: Failed to alloc %d rx slimbus channels\n",
 				__func__, wcd9xxx->num_rx_port);
 			kfree(wcd9xxx->rx_chs);
 			wcd9xxx->rx_chs = NULL;
 			wcd9xxx->num_rx_port = 0;
 		}
 	} else {
 		pr_err("Not able to allocate memory for %d slimbus rx ports\n",
 			wcd9xxx->num_rx_port);
 	}

 	if (wcd9xxx->tx_chs) {
 		wcd9xxx->num_tx_port = tx_num;
 		for (i = 0; i < tx_num; i++) {
 			wcd9xxx->tx_chs[i].ch_num = tx_slot[i];
 			INIT_LIST_HEAD(&wcd9xxx->tx_chs[i].list);
 		}
 		ret = wcd9xxx_alloc_slim_sh_ch(wcd9xxx, wcd9xxx_pgd_la,
 						wcd9xxx->num_tx_port,
 						wcd9xxx->tx_chs,
 						SLIM_SRC);
 		if (ret) {
 			pr_err("%s: Failed to alloc %d tx slimbus channels\n",
 				__func__, wcd9xxx->num_tx_port);
 			kfree(wcd9xxx->tx_chs);
 			wcd9xxx->tx_chs = NULL;
 			wcd9xxx->num_tx_port = 0;
 		}
 	} else {
 		pr_err("Not able to allocate memory for %d slimbus tx ports\n",
 			wcd9xxx->num_tx_port);
 	}

 	return 0;
 err:
 	return ret;
 }

 int wcd9xxx_deinit_slimslave(struct wcd9xxx *wcd9xxx)
 {
 	if (wcd9xxx->num_rx_port) {
 		wcd9xxx_dealloc_slim_sh_ch(wcd9xxx->slim,
 					wcd9xxx->num_rx_port,
 					wcd9xxx->rx_chs);
 		wcd9xxx->num_rx_port = 0;
 	}
 	if (wcd9xxx->num_tx_port) {
 		wcd9xxx_dealloc_slim_sh_ch(wcd9xxx->slim,
 					wcd9xxx->num_tx_port,
 					wcd9xxx->tx_chs);
 		wcd9xxx->num_tx_port = 0;
 	}
 	return 0;
 }


 static int wcd9xxx_alloc_slim_sh_ch(struct wcd9xxx *wcd9xxx,
 				    u8 wcd9xxx_pgd_la, u32 cnt,
 				    struct wcd9xxx_ch *channels, u32 path)
 {
 	int ret = 0;
 	u32 ch_idx ;

 	/* The slimbus channel allocation seem take longer time
 	 * so do the allocation up front to avoid delay in start of
 	 * playback
 	 */
 	pr_debug("%s: pgd_la[%d]\n", __func__, wcd9xxx_pgd_la);
 	for (ch_idx = 0; ch_idx < cnt; ch_idx++) {
 		ret = slim_get_slaveport(wcd9xxx_pgd_la,
 					channels[ch_idx].port,
 					&channels[ch_idx].sph, path);
 		pr_debug("%s: pgd_la[%d] channels[%d].port[%d]\n"
 			"channels[%d].sph[%d] path[%d]\n",
 			__func__, wcd9xxx_pgd_la, ch_idx,
 			channels[ch_idx].port,
 			ch_idx, channels[ch_idx].sph, path);
 		if (ret < 0) {
 			pr_err("%s: slave port failure id[%d] ret[%d]\n",
 				__func__, channels[ch_idx].ch_num, ret);
 			goto err;
 		}

 		ret = slim_query_ch(wcd9xxx->slim,
 				    channels[ch_idx].ch_num,
 				    &channels[ch_idx].ch_h);
 		if (ret < 0) {
 			pr_err("%s: slim_query_ch failed ch-num[%d] ret[%d]\n",
 				__func__, channels[ch_idx].ch_num, ret);
 			goto err;
 		}
 	}
 err:
 	return ret;
 }

 static int wcd9xxx_dealloc_slim_sh_ch(struct slim_device *slim,
 			u32 cnt, struct wcd9xxx_ch *channels)
 {
 	int idx = 0;
 	int ret = 0;
 	/* slim_dealloc_ch */
 	for (idx = 0; idx < cnt; idx++) {
 		ret = slim_dealloc_ch(slim, channels[idx].ch_h);
 		if (ret < 0) {
 			pr_err("%s: slim_dealloc_ch fail ret[%d] ch_h[%d]\n",
 				__func__, ret, channels[idx].ch_h);
 		}
 	}
 	return ret;
 }

 /* Enable slimbus slave device for RX path */
 int wcd9xxx_cfg_slim_sch_rx(struct wcd9xxx *wcd9xxx,
 			    struct list_head *wcd9xxx_ch_list,
 			    unsigned int rate, unsigned int bit_width,
 			    u16 *grph)
 {
 	u8 ch_cnt = 0;
 	u16 ch_h[SLIM_MAX_RX_PORTS] = {0};
 	u8  payload = 0;
 	u16 codec_port = 0;
 	int ret;
 	struct slim_ch prop;
 	struct wcd9xxx_ch *rx;

 	/* Configure slave interface device */

 	list_for_each_entry(rx, wcd9xxx_ch_list, list) {
 		payload |= 1 << rx->shift;
 		ch_h[ch_cnt] = rx->ch_h;
 		ch_cnt++;
 		pr_debug("list ch->ch_h %d ch->sph %d\n", rx->ch_h, rx->sph);
 	}
 	pr_debug("%s: ch_cnt[%d] rate=%d WATER_MARK_VAL %d\n",
 		 __func__, ch_cnt, rate, WATER_MARK_VAL);
 	/* slim_define_ch api */
 	prop.prot = SLIM_AUTO_ISO;
 	prop.baser = SLIM_RATE_4000HZ;
 	prop.dataf = SLIM_CH_DATAF_NOT_DEFINED;
 	prop.auxf = SLIM_CH_AUXF_NOT_APPLICABLE;
 	prop.ratem = (rate/4000);
 	prop.sampleszbits = bit_width;

 	pr_debug("Before slim_define_ch:\n"
 		 "ch_cnt %d,ch_h[0] %d ch_h[1] %d, grph %d\n",
 		 ch_cnt, ch_h[0], ch_h[1], *grph);
 	ret = slim_define_ch(wcd9xxx->slim, &prop, ch_h, ch_cnt,
 			     true, grph);
 	if (ret < 0) {
 		pr_err("%s: slim_define_ch failed ret[%d]\n",
 		       __func__, ret);
 		goto err;
 	}

 	list_for_each_entry(rx, wcd9xxx_ch_list, list) {
 		codec_port = rx->port;
 		pr_debug("%s: codec_port %d rx 0x%x, payload %d\n"
 			 "sh_ch.rx_port_ch_reg_base0 0x%x\n"
 			 "sh_ch.port_rx_cfg_reg_base 0x%x\n",
 			 __func__, codec_port, (u32)rx, payload,
 			 sh_ch.rx_port_ch_reg_base,
 			sh_ch.port_rx_cfg_reg_base);

 		/* look for the valid port range and chose the
 		 * payload accordingly
 		 */
 		/* write to interface device */
 		ret = wcd9xxx_interface_reg_write(wcd9xxx,
 				SB_PGD_RX_PORT_MULTI_CHANNEL_0(
 				sh_ch.rx_port_ch_reg_base, codec_port),
 				payload);

 		if (ret < 0) {
 			pr_err("%s:Intf-dev fail reg[%d] payload[%d] ret[%d]\n",
 				__func__,
 				SB_PGD_RX_PORT_MULTI_CHANNEL_0(
 				sh_ch.rx_port_ch_reg_base, codec_port),
 				payload, ret);
 			goto err;
 		}
 		/* configure the slave port for water mark and enable*/
 		ret = wcd9xxx_interface_reg_write(wcd9xxx,
 				SB_PGD_PORT_CFG_BYTE_ADDR(
 				sh_ch.port_rx_cfg_reg_base, codec_port),
 				WATER_MARK_VAL);
 		if (ret < 0) {
 			pr_err("%s:watermark set failure for port[%d] ret[%d]",
 				__func__, codec_port, ret);
 		}

 		ret = slim_connect_sink(wcd9xxx->slim, &rx->sph, 1, rx->ch_h);
 		if (ret < 0) {
 			pr_err("%s: slim_connect_sink failed ret[%d]\n",
 				__func__, ret);
 			goto err_close_slim_sch;
 		}
 	}
 	/* slim_control_ch */
 	ret = slim_control_ch(wcd9xxx->slim, *grph, SLIM_CH_ACTIVATE,
 			      true);
 	if (ret < 0) {
 		pr_err("%s: slim_control_ch failed ret[%d]\n",
 			__func__, ret);
 		goto err_close_slim_sch;
 	}
 	return 0;

 err_close_slim_sch:
 	/*  release all acquired handles */
 	wcd9xxx_close_slim_sch_rx(wcd9xxx, wcd9xxx_ch_list, *grph);
 err:
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_cfg_slim_sch_rx);

 /* Enable slimbus slave device for RX path */
 int wcd9xxx_cfg_slim_sch_tx(struct wcd9xxx *wcd9xxx,
 			    struct list_head *wcd9xxx_ch_list,
 			    unsigned int rate, unsigned int bit_width,
 			    u16 *grph)
 {
 	u16 ch_cnt = 0;
 	u16 payload = 0;
 	u16 ch_h[SLIM_MAX_TX_PORTS] = {0};
 	u16 codec_port;
 	int ret = 0;
 	struct wcd9xxx_ch *tx;

 	struct slim_ch prop;

 	list_for_each_entry(tx, wcd9xxx_ch_list, list) {
 		payload |= 1 << tx->shift;
 		ch_h[ch_cnt] = tx->ch_h;
 		ch_cnt++;
 	}

 	/* slim_define_ch api */
 	prop.prot = SLIM_AUTO_ISO;
 	prop.baser = SLIM_RATE_4000HZ;
 	prop.dataf = SLIM_CH_DATAF_NOT_DEFINED;
 	prop.auxf = SLIM_CH_AUXF_NOT_APPLICABLE;
 	prop.ratem = (rate/4000);
 	prop.sampleszbits = 16;
 	ret = slim_define_ch(wcd9xxx->slim, &prop, ch_h, ch_cnt,
 			     true, grph);
 	if (ret < 0) {
 		pr_err("%s: slim_define_ch failed ret[%d]\n",
 		       __func__, ret);
 		goto err;
 	}

 	pr_debug("%s: ch_cnt[%d] rate[%d]\n", __func__, ch_cnt, rate);
 	list_for_each_entry(tx, wcd9xxx_ch_list, list) {
 		codec_port = tx->port;
 		pr_debug("%s: codec_port %d rx 0x%x, payload 0x%x\n",
 			 __func__, codec_port, (u32)tx, payload);
 		/* write to interface device */
 		ret = wcd9xxx_interface_reg_write(wcd9xxx,
 				SB_PGD_TX_PORT_MULTI_CHANNEL_0(codec_port),
 				payload & 0x00FF);
 		if (ret < 0) {
 			pr_err("%s:Intf-dev fail reg[%d] payload[%d] ret[%d]\n",
 				__func__,
 				SB_PGD_TX_PORT_MULTI_CHANNEL_0(codec_port),
 				payload, ret);
 			goto err;
 		}
 		/* ports 8,9 */
 		ret = wcd9xxx_interface_reg_write(wcd9xxx,
 				SB_PGD_TX_PORT_MULTI_CHANNEL_1(codec_port),
 				(payload & 0xFF00)>>8);
 		if (ret < 0) {
 			pr_err("%s:Intf-dev fail reg[%d] payload[%d] ret[%d]\n",
 				__func__,
 				SB_PGD_TX_PORT_MULTI_CHANNEL_1(codec_port),
 				payload, ret);
 			goto err;
 		}
 		/* configure the slave port for water mark and enable*/
 		ret = wcd9xxx_interface_reg_write(wcd9xxx,
 				SB_PGD_PORT_CFG_BYTE_ADDR(
 				sh_ch.port_tx_cfg_reg_base, codec_port),
 				WATER_MARK_VAL);
 		if (ret < 0) {
 			pr_err("%s:watermark set failure for port[%d] ret[%d]",
 				__func__, codec_port, ret);
 		}

 		ret = slim_connect_src(wcd9xxx->slim, tx->sph, tx->ch_h);

 		if (ret < 0) {
 			pr_err("%s: slim_connect_src failed ret[%d]\n",
 			       __func__, ret);
 			goto err;
 		}
 	}
 	/* slim_control_ch */
 	ret = slim_control_ch(wcd9xxx->slim, *grph, SLIM_CH_ACTIVATE,
 			      true);
 	if (ret < 0) {
 		pr_err("%s: slim_control_ch failed ret[%d]\n",
 			__func__, ret);
 		goto err;
 	}
 	return 0;
 err:
 	/* release all acquired handles */
 	wcd9xxx_close_slim_sch_tx(wcd9xxx, wcd9xxx_ch_list, *grph);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_cfg_slim_sch_tx);

 int wcd9xxx_close_slim_sch_rx(struct wcd9xxx *wcd9xxx,
 			      struct list_head *wcd9xxx_ch_list, u16 grph)
 {
 	u32 sph[SLIM_MAX_RX_PORTS] = {0};
 	int ch_cnt = 0 ;
 	int ret = 0;
 	struct wcd9xxx_ch *rx;

 	list_for_each_entry(rx, wcd9xxx_ch_list, list)
 		sph[ch_cnt++] = rx->sph;

 	pr_debug("%s ch_cht %d, sph[0] %d sph[1] %d\n", __func__, ch_cnt,
 		sph[0], sph[1]);

 	/* slim_control_ch (REMOVE) */
 	pr_debug("%s before slim_control_ch grph %d\n", __func__, grph);
 	ret = slim_control_ch(wcd9xxx->slim, grph, SLIM_CH_REMOVE, true);
 	if (ret < 0) {
 		pr_err("%s: slim_control_ch failed ret[%d]\n", __func__, ret);
 		goto err;
 	}
 err:
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_close_slim_sch_rx);

 int wcd9xxx_close_slim_sch_tx(struct wcd9xxx *wcd9xxx,
 			      struct list_head *wcd9xxx_ch_list,
 			      u16 grph)
 {
 	u32 sph[SLIM_MAX_TX_PORTS] = {0};
 	int ret = 0;
 	int ch_cnt = 0 ;
 	struct wcd9xxx_ch *tx;

 	pr_debug("%s\n", __func__);
 	list_for_each_entry(tx, wcd9xxx_ch_list, list)
 		sph[ch_cnt++] = tx->sph;

 	pr_debug("%s ch_cht %d, sph[0] %d sph[1] %d\n",
 		__func__, ch_cnt, sph[0], sph[1]);
 	/* slim_control_ch (REMOVE) */
 	ret = slim_control_ch(wcd9xxx->slim, grph, SLIM_CH_REMOVE, true);
 	if (ret < 0) {
 		pr_err("%s: slim_control_ch failed ret[%d]\n",
 			__func__, ret);
 		goto err;
 	}
 err:
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_close_slim_sch_tx);

 int wcd9xxx_get_slave_port(unsigned int ch_num)
 {
 	int ret = 0;

 	ret = (ch_num - BASE_CH_NUM);
 	pr_debug("%s: ch_num[%d] slave port[%d]\n", __func__, ch_num, ret);
 	if (ret < 0) {
 		pr_err("%s: Error:- Invalid slave port found = %d\n",
 			__func__, ret);
 		return -EINVAL;
 	}
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_get_slave_port);

 int wcd9xxx_disconnect_port(struct wcd9xxx *wcd9xxx,
 			    struct list_head *wcd9xxx_ch_list, u16 grph)
 {
 	u32 sph[SLIM_MAX_TX_PORTS + SLIM_MAX_RX_PORTS] = {0};
 	int ch_cnt = 0 ;
 	int ret = 0;
 	struct wcd9xxx_ch *slim_ch;

 	list_for_each_entry(slim_ch, wcd9xxx_ch_list, list)
 		sph[ch_cnt++] = slim_ch->sph;

 	/* slim_disconnect_port */
 	ret = slim_disconnect_ports(wcd9xxx->slim, sph, ch_cnt);
 	if (ret < 0) {
 		pr_err("%s: slim_disconnect_ports failed ret[%d]\n",
 			__func__, ret);
 	}
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_disconnect_port);

 /* This function is called with mutex acquired */
 int wcd9xxx_rx_vport_validation(u32 port_id,
 				struct list_head *codec_dai_list)
 {
 	struct wcd9xxx_ch *ch;
 	int ret = 0;

 	pr_debug("%s: port_id %u\n", __func__, port_id);

 	list_for_each_entry(ch,
 		codec_dai_list, list) {
 		pr_debug("%s: ch->port %u\n", __func__, ch->port);
 		if (ch->port == port_id) {
 			ret = -EINVAL;
 			break;
 		}
 	}
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_rx_vport_validation);


 /* This function is called with mutex acquired */
 int wcd9xxx_tx_vport_validation(u32 vtable, u32 port_id,
 				struct wcd9xxx_codec_dai_data *codec_dai)
 {
 	struct wcd9xxx_ch *ch;
 	int ret = 0;
 	u32 index;
 	u32 size = sizeof(vtable) * 8;
 	pr_debug("%s: vtable 0x%x port_id %u size %d\n", __func__,
 		 vtable, port_id, size);
 	for_each_set_bit(index, (unsigned long *)&vtable, size) {
 		list_for_each_entry(ch,
 				    &codec_dai[index].wcd9xxx_ch_list,
 				    list) {
 			pr_debug("%s: index %u ch->port %u vtable 0x%x\n",
 				 __func__, index, ch->port, vtable);
 			if (ch->port == port_id) {
 				pr_err("%s: TX%u is used by AIF%u_CAP Mixer\n",
 					__func__, port_id + 1,
 					(index + 1)/2);
 				ret = -EINVAL;
 				break;
 			}
 		}
 		if (ret)
 			break;
 	}
 	return ret;
 }
 EXPORT_SYMBOL_GPL(wcd9xxx_tx_vport_validation);
	/* Copyright (c) 2012-2013, 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/slab.h>
	#include <linux/mutex.h>
	#include <linux/mfd/wcd9xxx/wcd9xxx-slimslave.h>
	#include <linux/mfd/wcd9xxx/wcd9xxx_registers.h>

	struct wcd9xxx_slim_sch {
	u16 rx_port_ch_reg_base;
	u16 port_tx_cfg_reg_base;
	u16 port_rx_cfg_reg_base;
	};

	static struct wcd9xxx_slim_sch sh_ch;

	static int wcd9xxx_alloc_slim_sh_ch(struct wcd9xxx *wcd9xxx,
	u8 wcd9xxx_pgd_la, u32 cnt,
	struct wcd9xxx_ch *channels, u32 path);

	static int wcd9xxx_dealloc_slim_sh_ch(struct slim_device *slim,
	u32 cnt, struct wcd9xxx_ch *channels);

	static int wcd9xxx_configure_ports(struct wcd9xxx *wcd9xxx)
	{
	if (wcd9xxx->codec_type->slim_slave_type ==
	WCD9XXX_SLIM_SLAVE_ADDR_TYPE_TABLA) {
	sh_ch.rx_port_ch_reg_base = 0x180;
	sh_ch.port_rx_cfg_reg_base = 0x040;
	sh_ch.port_tx_cfg_reg_base = 0x040;
	} else {
	sh_ch.rx_port_ch_reg_base =
	0x180 - (TAIKO_SB_PGD_OFFSET_OF_RX_SLAVE_DEV_PORTS * 4);
	sh_ch.port_rx_cfg_reg_base =
	0x040 - TAIKO_SB_PGD_OFFSET_OF_RX_SLAVE_DEV_PORTS;
	sh_ch.port_tx_cfg_reg_base = 0x050;
	}

	return 0;
	}


	int wcd9xxx_init_slimslave(struct wcd9xxx *wcd9xxx, u8 wcd9xxx_pgd_la,
	unsigned int tx_num, unsigned int *tx_slot,
	unsigned int rx_num, unsigned int *rx_slot)
	{
	int ret = 0;
	int i;

	ret = wcd9xxx_configure_ports(wcd9xxx);
	if (ret) {
	pr_err("%s: Failed to configure register address offset\n",
	__func__);
	goto err;
	}

	if (wcd9xxx->rx_chs) {
	wcd9xxx->num_rx_port = rx_num;
	for (i = 0; i < rx_num; i++) {
	wcd9xxx->rx_chs[i].ch_num = rx_slot[i];
	INIT_LIST_HEAD(&wcd9xxx->rx_chs[i].list);
	}
	ret = wcd9xxx_alloc_slim_sh_ch(wcd9xxx, wcd9xxx_pgd_la,
	wcd9xxx->num_rx_port,
	wcd9xxx->rx_chs,
	SLIM_SINK);
	if (ret) {
	pr_err("%s: Failed to alloc %d rx slimbus channels\n",
	__func__, wcd9xxx->num_rx_port);
	kfree(wcd9xxx->rx_chs);
	wcd9xxx->rx_chs = NULL;
	wcd9xxx->num_rx_port = 0;
	}
	} else {
	pr_err("Not able to allocate memory for %d slimbus rx ports\n",
	wcd9xxx->num_rx_port);
	}

	if (wcd9xxx->tx_chs) {
	wcd9xxx->num_tx_port = tx_num;
	for (i = 0; i < tx_num; i++) {
	wcd9xxx->tx_chs[i].ch_num = tx_slot[i];
	INIT_LIST_HEAD(&wcd9xxx->tx_chs[i].list);
	}
	ret = wcd9xxx_alloc_slim_sh_ch(wcd9xxx, wcd9xxx_pgd_la,
	wcd9xxx->num_tx_port,
	wcd9xxx->tx_chs,
	SLIM_SRC);
	if (ret) {
	pr_err("%s: Failed to alloc %d tx slimbus channels\n",
	__func__, wcd9xxx->num_tx_port);
	kfree(wcd9xxx->tx_chs);
	wcd9xxx->tx_chs = NULL;
	wcd9xxx->num_tx_port = 0;
	}
	} else {
	pr_err("Not able to allocate memory for %d slimbus tx ports\n",
	wcd9xxx->num_tx_port);
	}

	return 0;
	err:
	return ret;
	}

	int wcd9xxx_deinit_slimslave(struct wcd9xxx *wcd9xxx)
	{
	if (wcd9xxx->num_rx_port) {
	wcd9xxx_dealloc_slim_sh_ch(wcd9xxx->slim,
	wcd9xxx->num_rx_port,
	wcd9xxx->rx_chs);
	wcd9xxx->num_rx_port = 0;
	}
	if (wcd9xxx->num_tx_port) {
	wcd9xxx_dealloc_slim_sh_ch(wcd9xxx->slim,
	wcd9xxx->num_tx_port,
	wcd9xxx->tx_chs);
	wcd9xxx->num_tx_port = 0;
	}
	return 0;
	}


	static int wcd9xxx_alloc_slim_sh_ch(struct wcd9xxx *wcd9xxx,
	u8 wcd9xxx_pgd_la, u32 cnt,
	struct wcd9xxx_ch *channels, u32 path)
	{
	int ret = 0;
	u32 ch_idx ;

	/* The slimbus channel allocation seem take longer time
	* so do the allocation up front to avoid delay in start of
	* playback
	*/
	pr_debug("%s: pgd_la[%d]\n", __func__, wcd9xxx_pgd_la);
	for (ch_idx = 0; ch_idx < cnt; ch_idx++) {
	ret = slim_get_slaveport(wcd9xxx_pgd_la,
	channels[ch_idx].port,
	&channels[ch_idx].sph, path);
	pr_debug("%s: pgd_la[%d] channels[%d].port[%d]\n"
	"channels[%d].sph[%d] path[%d]\n",
	__func__, wcd9xxx_pgd_la, ch_idx,
	channels[ch_idx].port,
	ch_idx, channels[ch_idx].sph, path);
	if (ret < 0) {
	pr_err("%s: slave port failure id[%d] ret[%d]\n",
	__func__, channels[ch_idx].ch_num, ret);
	goto err;
	}

	ret = slim_query_ch(wcd9xxx->slim,
	channels[ch_idx].ch_num,
	&channels[ch_idx].ch_h);
	if (ret < 0) {
	pr_err("%s: slim_query_ch failed ch-num[%d] ret[%d]\n",
	__func__, channels[ch_idx].ch_num, ret);
	goto err;
	}
	}
	err:
	return ret;
	}

	static int wcd9xxx_dealloc_slim_sh_ch(struct slim_device *slim,
	u32 cnt, struct wcd9xxx_ch *channels)
	{
	int idx = 0;
	int ret = 0;
	/* slim_dealloc_ch */
	for (idx = 0; idx < cnt; idx++) {
	ret = slim_dealloc_ch(slim, channels[idx].ch_h);
	if (ret < 0) {
	pr_err("%s: slim_dealloc_ch fail ret[%d] ch_h[%d]\n",
	__func__, ret, channels[idx].ch_h);
	}
	}
	return ret;
	}

	/* Enable slimbus slave device for RX path */
	int wcd9xxx_cfg_slim_sch_rx(struct wcd9xxx *wcd9xxx,
	struct list_head *wcd9xxx_ch_list,
	unsigned int rate, unsigned int bit_width,
	u16 *grph)
	{
	u8 ch_cnt = 0;
	u16 ch_h[SLIM_MAX_RX_PORTS] = {0};
	u8 payload = 0;
	u16 codec_port = 0;
	int ret;
	struct slim_ch prop;
	struct wcd9xxx_ch *rx;

	/* Configure slave interface device */

	list_for_each_entry(rx, wcd9xxx_ch_list, list) {
	payload \|= 1 << rx->shift;
	ch_h[ch_cnt] = rx->ch_h;
	ch_cnt++;
	pr_debug("list ch->ch_h %d ch->sph %d\n", rx->ch_h, rx->sph);
	}
	pr_debug("%s: ch_cnt[%d] rate=%d WATER_MARK_VAL %d\n",
	__func__, ch_cnt, rate, WATER_MARK_VAL);
	/* slim_define_ch api */
	prop.prot = SLIM_AUTO_ISO;
	prop.baser = SLIM_RATE_4000HZ;
	prop.dataf = SLIM_CH_DATAF_NOT_DEFINED;
	prop.auxf = SLIM_CH_AUXF_NOT_APPLICABLE;
	prop.ratem = (rate/4000);
	prop.sampleszbits = bit_width;

	pr_debug("Before slim_define_ch:\n"
	"ch_cnt %d,ch_h[0] %d ch_h[1] %d, grph %d\n",
	ch_cnt, ch_h[0], ch_h[1], *grph);
	ret = slim_define_ch(wcd9xxx->slim, &prop, ch_h, ch_cnt,
	true, grph);
	if (ret < 0) {
	pr_err("%s: slim_define_ch failed ret[%d]\n",
	__func__, ret);
	goto err;
	}

	list_for_each_entry(rx, wcd9xxx_ch_list, list) {
	codec_port = rx->port;
	pr_debug("%s: codec_port %d rx 0x%x, payload %d\n"
	"sh_ch.rx_port_ch_reg_base0 0x%x\n"
	"sh_ch.port_rx_cfg_reg_base 0x%x\n",
	__func__, codec_port, (u32)rx, payload,
	sh_ch.rx_port_ch_reg_base,
	sh_ch.port_rx_cfg_reg_base);

	/* look for the valid port range and chose the
	* payload accordingly
	*/
	/* write to interface device */
	ret = wcd9xxx_interface_reg_write(wcd9xxx,
	SB_PGD_RX_PORT_MULTI_CHANNEL_0(
	sh_ch.rx_port_ch_reg_base, codec_port),
	payload);

	if (ret < 0) {
	pr_err("%s:Intf-dev fail reg[%d] payload[%d] ret[%d]\n",
	__func__,
	SB_PGD_RX_PORT_MULTI_CHANNEL_0(
	sh_ch.rx_port_ch_reg_base, codec_port),
	payload, ret);
	goto err;
	}
	/* configure the slave port for water mark and enable*/
	ret = wcd9xxx_interface_reg_write(wcd9xxx,
	SB_PGD_PORT_CFG_BYTE_ADDR(
	sh_ch.port_rx_cfg_reg_base, codec_port),
	WATER_MARK_VAL);
	if (ret < 0) {
	pr_err("%s:watermark set failure for port[%d] ret[%d]",
	__func__, codec_port, ret);
	}

	ret = slim_connect_sink(wcd9xxx->slim, &rx->sph, 1, rx->ch_h);
	if (ret < 0) {
	pr_err("%s: slim_connect_sink failed ret[%d]\n",
	__func__, ret);
	goto err_close_slim_sch;
	}
	}
	/* slim_control_ch */
	ret = slim_control_ch(wcd9xxx->slim, *grph, SLIM_CH_ACTIVATE,
	true);
	if (ret < 0) {
	pr_err("%s: slim_control_ch failed ret[%d]\n",
	__func__, ret);
	goto err_close_slim_sch;
	}
	return 0;

	err_close_slim_sch:
	/* release all acquired handles */
	wcd9xxx_close_slim_sch_rx(wcd9xxx, wcd9xxx_ch_list, *grph);
	err:
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_cfg_slim_sch_rx);

	/* Enable slimbus slave device for RX path */
	int wcd9xxx_cfg_slim_sch_tx(struct wcd9xxx *wcd9xxx,
	struct list_head *wcd9xxx_ch_list,
	unsigned int rate, unsigned int bit_width,
	u16 *grph)
	{
	u16 ch_cnt = 0;
	u16 payload = 0;
	u16 ch_h[SLIM_MAX_TX_PORTS] = {0};
	u16 codec_port;
	int ret = 0;
	struct wcd9xxx_ch *tx;

	struct slim_ch prop;

	list_for_each_entry(tx, wcd9xxx_ch_list, list) {
	payload \|= 1 << tx->shift;
	ch_h[ch_cnt] = tx->ch_h;
	ch_cnt++;
	}

	/* slim_define_ch api */
	prop.prot = SLIM_AUTO_ISO;
	prop.baser = SLIM_RATE_4000HZ;
	prop.dataf = SLIM_CH_DATAF_NOT_DEFINED;
	prop.auxf = SLIM_CH_AUXF_NOT_APPLICABLE;
	prop.ratem = (rate/4000);
	prop.sampleszbits = 16;
	ret = slim_define_ch(wcd9xxx->slim, &prop, ch_h, ch_cnt,
	true, grph);
	if (ret < 0) {
	pr_err("%s: slim_define_ch failed ret[%d]\n",
	__func__, ret);
	goto err;
	}

	pr_debug("%s: ch_cnt[%d] rate[%d]\n", __func__, ch_cnt, rate);
	list_for_each_entry(tx, wcd9xxx_ch_list, list) {
	codec_port = tx->port;
	pr_debug("%s: codec_port %d rx 0x%x, payload 0x%x\n",
	__func__, codec_port, (u32)tx, payload);
	/* write to interface device */
	ret = wcd9xxx_interface_reg_write(wcd9xxx,
	SB_PGD_TX_PORT_MULTI_CHANNEL_0(codec_port),
	payload & 0x00FF);
	if (ret < 0) {
	pr_err("%s:Intf-dev fail reg[%d] payload[%d] ret[%d]\n",
	__func__,
	SB_PGD_TX_PORT_MULTI_CHANNEL_0(codec_port),
	payload, ret);
	goto err;
	}
	/* ports 8,9 */
	ret = wcd9xxx_interface_reg_write(wcd9xxx,
	SB_PGD_TX_PORT_MULTI_CHANNEL_1(codec_port),
	(payload & 0xFF00)>>8);
	if (ret < 0) {
	pr_err("%s:Intf-dev fail reg[%d] payload[%d] ret[%d]\n",
	__func__,
	SB_PGD_TX_PORT_MULTI_CHANNEL_1(codec_port),
	payload, ret);
	goto err;
	}
	/* configure the slave port for water mark and enable*/
	ret = wcd9xxx_interface_reg_write(wcd9xxx,
	SB_PGD_PORT_CFG_BYTE_ADDR(
	sh_ch.port_tx_cfg_reg_base, codec_port),
	WATER_MARK_VAL);
	if (ret < 0) {
	pr_err("%s:watermark set failure for port[%d] ret[%d]",
	__func__, codec_port, ret);
	}

	ret = slim_connect_src(wcd9xxx->slim, tx->sph, tx->ch_h);

	if (ret < 0) {
	pr_err("%s: slim_connect_src failed ret[%d]\n",
	__func__, ret);
	goto err;
	}
	}
	/* slim_control_ch */
	ret = slim_control_ch(wcd9xxx->slim, *grph, SLIM_CH_ACTIVATE,
	true);
	if (ret < 0) {
	pr_err("%s: slim_control_ch failed ret[%d]\n",
	__func__, ret);
	goto err;
	}
	return 0;
	err:
	/* release all acquired handles */
	wcd9xxx_close_slim_sch_tx(wcd9xxx, wcd9xxx_ch_list, *grph);
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_cfg_slim_sch_tx);

	int wcd9xxx_close_slim_sch_rx(struct wcd9xxx *wcd9xxx,
	struct list_head *wcd9xxx_ch_list, u16 grph)
	{
	u32 sph[SLIM_MAX_RX_PORTS] = {0};
	int ch_cnt = 0 ;
	int ret = 0;
	struct wcd9xxx_ch *rx;

	list_for_each_entry(rx, wcd9xxx_ch_list, list)
	sph[ch_cnt++] = rx->sph;

	pr_debug("%s ch_cht %d, sph[0] %d sph[1] %d\n", __func__, ch_cnt,
	sph[0], sph[1]);

	/* slim_control_ch (REMOVE) */
	pr_debug("%s before slim_control_ch grph %d\n", __func__, grph);
	ret = slim_control_ch(wcd9xxx->slim, grph, SLIM_CH_REMOVE, true);
	if (ret < 0) {
	pr_err("%s: slim_control_ch failed ret[%d]\n", __func__, ret);
	goto err;
	}
	err:
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_close_slim_sch_rx);

	int wcd9xxx_close_slim_sch_tx(struct wcd9xxx *wcd9xxx,
	struct list_head *wcd9xxx_ch_list,
	u16 grph)
	{
	u32 sph[SLIM_MAX_TX_PORTS] = {0};
	int ret = 0;
	int ch_cnt = 0 ;
	struct wcd9xxx_ch *tx;

	pr_debug("%s\n", __func__);
	list_for_each_entry(tx, wcd9xxx_ch_list, list)
	sph[ch_cnt++] = tx->sph;

	pr_debug("%s ch_cht %d, sph[0] %d sph[1] %d\n",
	__func__, ch_cnt, sph[0], sph[1]);
	/* slim_control_ch (REMOVE) */
	ret = slim_control_ch(wcd9xxx->slim, grph, SLIM_CH_REMOVE, true);
	if (ret < 0) {
	pr_err("%s: slim_control_ch failed ret[%d]\n",
	__func__, ret);
	goto err;
	}
	err:
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_close_slim_sch_tx);

	int wcd9xxx_get_slave_port(unsigned int ch_num)
	{
	int ret = 0;

	ret = (ch_num - BASE_CH_NUM);
	pr_debug("%s: ch_num[%d] slave port[%d]\n", __func__, ch_num, ret);
	if (ret < 0) {
	pr_err("%s: Error:- Invalid slave port found = %d\n",
	__func__, ret);
	return -EINVAL;
	}
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_get_slave_port);

	int wcd9xxx_disconnect_port(struct wcd9xxx *wcd9xxx,
	struct list_head *wcd9xxx_ch_list, u16 grph)
	{
	u32 sph[SLIM_MAX_TX_PORTS + SLIM_MAX_RX_PORTS] = {0};
	int ch_cnt = 0 ;
	int ret = 0;
	struct wcd9xxx_ch *slim_ch;

	list_for_each_entry(slim_ch, wcd9xxx_ch_list, list)
	sph[ch_cnt++] = slim_ch->sph;

	/* slim_disconnect_port */
	ret = slim_disconnect_ports(wcd9xxx->slim, sph, ch_cnt);
	if (ret < 0) {
	pr_err("%s: slim_disconnect_ports failed ret[%d]\n",
	__func__, ret);
	}
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_disconnect_port);

	/* This function is called with mutex acquired */
	int wcd9xxx_rx_vport_validation(u32 port_id,
	struct list_head *codec_dai_list)
	{
	struct wcd9xxx_ch *ch;
	int ret = 0;

	pr_debug("%s: port_id %u\n", __func__, port_id);

	list_for_each_entry(ch,
	codec_dai_list, list) {
	pr_debug("%s: ch->port %u\n", __func__, ch->port);
	if (ch->port == port_id) {
	ret = -EINVAL;
	break;
	}
	}
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_rx_vport_validation);


	/* This function is called with mutex acquired */
	int wcd9xxx_tx_vport_validation(u32 vtable, u32 port_id,
	struct wcd9xxx_codec_dai_data *codec_dai)
	{
	struct wcd9xxx_ch *ch;
	int ret = 0;
	u32 index;
	u32 size = sizeof(vtable) * 8;
	pr_debug("%s: vtable 0x%x port_id %u size %d\n", __func__,
	vtable, port_id, size);
	for_each_set_bit(index, (unsigned long *)&vtable, size) {
	list_for_each_entry(ch,
	&codec_dai[index].wcd9xxx_ch_list,
	list) {
	pr_debug("%s: index %u ch->port %u vtable 0x%x\n",
	__func__, index, ch->port, vtable);
	if (ch->port == port_id) {
	pr_err("%s: TX%u is used by AIF%u_CAP Mixer\n",
	__func__, port_id + 1,
	(index + 1)/2);
	ret = -EINVAL;
	break;
	}
	}
	if (ret)
	break;
	}
	return ret;
	}
	EXPORT_SYMBOL_GPL(wcd9xxx_tx_vport_validation);