alsa-utils/topology/nhlt/intel/ssp-nhlt.c

// SPDX-License-Identifier: BSD-3-Clause
//
// Copyright(c) 2021 Intel Corporation. All rights reserved.
//
// Author: Jaska Uimonen <jaska.uimonen@linux.intel.com>

#include <stdint.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <alsa/input.h>
#include <alsa/output.h>
#include <alsa/conf.h>
#include <alsa/error.h>
#include "intel-nhlt.h"
#include "ssp-nhlt.h"
#include "ssp/ssp-process.h"
#include "ssp/ssp-internal.h"

static int set_mn_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long m_div;
	long n_div;
	long ret;

	struct dai_values ssp_mn_data[] = {
		{"m_div", SND_CONFIG_TYPE_INTEGER, NULL, &m_div, NULL},
		{"n_div", SND_CONFIG_TYPE_INTEGER, NULL, &n_div, NULL},
	};

	ret = find_set_values(&ssp_mn_data[0], ARRAY_SIZE(ssp_mn_data), cfg, top,
			      "Class.Base.mn_config");
	if (ret < 0)
		return ret;

	return ssp_mn_set_params(nhlt, m_div, n_div);
}

static int set_clk_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long clock_warm_up;
	long mclk;
	long warm_up_ovr;
	long clock_stop_delay;
	long keep_running;
	long clock_stop_ovr;
	long ret;

	struct dai_values ssp_clk_data[] = {
		{"clock_warm_up", SND_CONFIG_TYPE_INTEGER, NULL, &clock_warm_up, NULL},
		{"mclk", SND_CONFIG_TYPE_INTEGER, NULL, &mclk, NULL},
		{"warm_up_ovr", SND_CONFIG_TYPE_INTEGER, NULL, &warm_up_ovr, NULL},
		{"clock_stop_delay", SND_CONFIG_TYPE_INTEGER, NULL, &clock_stop_delay, NULL},
		{"keep_running", SND_CONFIG_TYPE_INTEGER, NULL, &keep_running, NULL},
		{"clock_stop_ovr", SND_CONFIG_TYPE_INTEGER, NULL, &clock_stop_ovr, NULL},
	};

	ret = find_set_values(&ssp_clk_data[0], ARRAY_SIZE(ssp_clk_data), cfg, top,
			      "Class.Base.clk_config");
	if (ret < 0)
		return ret;

	return ssp_clk_set_params(nhlt, clock_warm_up, mclk, warm_up_ovr, clock_stop_delay,
				  keep_running, clock_stop_ovr);
}

static int set_tr_start_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long sampling_frequency;
	long bit_depth;
	long channel_map;
	long channel_config;
	long interleaving_style;
	long number_of_channels;
	long valid_bit_depth;
	long sample_type;
	long ret;

	struct dai_values ssp_tr_data[] = {
		{"sampling_frequency", SND_CONFIG_TYPE_INTEGER, NULL, &sampling_frequency, NULL},
		{"bit_depth", SND_CONFIG_TYPE_INTEGER, NULL, &bit_depth, NULL},
		{"channel_map", SND_CONFIG_TYPE_INTEGER, NULL, &channel_map, NULL},
		{"channel_config", SND_CONFIG_TYPE_INTEGER, NULL, &channel_config, NULL},
		{"interleaving_style", SND_CONFIG_TYPE_INTEGER, NULL, &interleaving_style, NULL},
		{"number_of_channels", SND_CONFIG_TYPE_INTEGER, NULL, &number_of_channels, NULL},
		{"valid_bit_depth", SND_CONFIG_TYPE_INTEGER, NULL, &valid_bit_depth, NULL},
		{"sample_type", SND_CONFIG_TYPE_INTEGER, NULL, &sample_type, NULL},
	};

	ret = find_set_values(&ssp_tr_data[0], ARRAY_SIZE(ssp_tr_data), cfg, top,
			      "Class.Base.tr_start_config");
	if (ret < 0)
		return ret;

	return ssp_tr_start_set_params(nhlt, sampling_frequency, bit_depth, channel_map,
				       channel_config, interleaving_style, number_of_channels,
				       valid_bit_depth,sample_type);
}

static int set_tr_stop_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long sampling_frequency;
	long bit_depth;
	long channel_map;
	long channel_config;
	long interleaving_style;
	long number_of_channels;
	long valid_bit_depth;
	long sample_type;
	long ret;

	struct dai_values ssp_tr_data[] = {
		{"sampling_frequency", SND_CONFIG_TYPE_INTEGER, NULL, &sampling_frequency, NULL},
		{"bit_depth", SND_CONFIG_TYPE_INTEGER, NULL, &bit_depth, NULL},
		{"channel_map", SND_CONFIG_TYPE_INTEGER, NULL, &channel_map, NULL},
		{"channel_config", SND_CONFIG_TYPE_INTEGER, NULL, &channel_config, NULL},
		{"interleaving_style", SND_CONFIG_TYPE_INTEGER, NULL, &interleaving_style, NULL},
		{"number_of_channels", SND_CONFIG_TYPE_INTEGER, NULL, &number_of_channels, NULL},
		{"valid_bit_depth", SND_CONFIG_TYPE_INTEGER, NULL, &valid_bit_depth, NULL},
		{"sample_type", SND_CONFIG_TYPE_INTEGER, NULL, &sample_type, NULL},
	};

	ret = find_set_values(&ssp_tr_data[0], ARRAY_SIZE(ssp_tr_data), cfg, top,
			      "Class.Base.tr_stop_config");
	if (ret < 0)
		return ret;

	return ssp_tr_stop_set_params(nhlt, sampling_frequency, bit_depth, channel_map,
				      channel_config, interleaving_style, number_of_channels,
				      valid_bit_depth,sample_type);
}

static int set_run_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long always_run;
	long ret;

	struct dai_values ssp_run_data[] = {
		{"always_run", SND_CONFIG_TYPE_INTEGER, NULL, &always_run, NULL},
	};

	ret = find_set_values(&ssp_run_data[0], ARRAY_SIZE(ssp_run_data), cfg, top,
			      "Class.Base.run_config");
	if (ret < 0)
		return ret;

	return ssp_run_set_params(nhlt, always_run);
}

static int set_node_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long sampling_rate;
	long node_id;
	long ret;

	struct dai_values ssp_node_data[] = {
		{"node_id", SND_CONFIG_TYPE_INTEGER, NULL, &node_id, NULL},
		{"sampling_rate", SND_CONFIG_TYPE_INTEGER, NULL, &sampling_rate, NULL},
	};

	ret = find_set_values(&ssp_node_data[0], ARRAY_SIZE(ssp_node_data), cfg, top,
			      "Class.Base.node_config");
	if (ret < 0)
		return ret;

	return ssp_node_set_params(nhlt, node_id, sampling_rate);
}

static int set_sync_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long sync_denominator;
	long ret;

	struct dai_values ssp_sync_data[] = {
		{"sync_denominator", SND_CONFIG_TYPE_INTEGER, NULL, &sync_denominator, NULL},
	};

	ret = find_set_values(&ssp_sync_data[0], ARRAY_SIZE(ssp_sync_data), cfg, top,
			      "Class.Base.sync_config");
	if (ret < 0)
		return ret;

	return ssp_sync_set_params(nhlt, sync_denominator);
}

static int set_ext_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long mclk_policy_override;
	long mclk_always_running;
	long mclk_starts_on_gtw_init;
	long mclk_starts_on_run;
	long mclk_starts_on_pause;
	long mclk_stops_on_pause;
	long mclk_stops_on_reset;

	long bclk_policy_override;
	long bclk_always_running;
	long bclk_starts_on_gtw_init;
	long bclk_starts_on_run;
	long bclk_starts_on_pause;
	long bclk_stops_on_pause;
	long bclk_stops_on_reset;

	long sync_policy_override;
	long sync_always_running;
	long sync_starts_on_gtw_init;
	long sync_starts_on_run;
	long sync_starts_on_pause;
	long sync_stops_on_pause;
	long sync_stops_on_reset;
	long ret;

	struct dai_values ssp_ext_data[] = {
		{"mclk_policy_override", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_policy_override, NULL},
		{"mclk_always_running", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_always_running, NULL},
		{"mclk_starts_on_gtw_init", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_starts_on_gtw_init, NULL},
		{"mclk_starts_on_run", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_starts_on_run, NULL},
		{"mclk_starts_on_pause", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_starts_on_pause, NULL},
		{"mclk_stops_on_pause", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_stops_on_pause, NULL},
		{"mclk_stops_on_reset", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_stops_on_reset, NULL},
		{"bclk_policy_override", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_policy_override, NULL},
		{"bclk_always_running", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_always_running, NULL},
		{"bclk_starts_on_gtw_init", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_starts_on_gtw_init, NULL},
		{"bclk_starts_on_run", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_starts_on_run, NULL},
		{"bclk_starts_on_pause", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_starts_on_pause, NULL},
		{"bclk_stops_on_pause", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_stops_on_pause, NULL},
		{"bclk_stops_on_reset", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_stops_on_reset, NULL},
		{"sync_policy_override", SND_CONFIG_TYPE_INTEGER, NULL, &sync_policy_override, NULL},
		{"sync_always_running", SND_CONFIG_TYPE_INTEGER, NULL, &sync_always_running, NULL},
		{"sync_starts_on_gtw_init", SND_CONFIG_TYPE_INTEGER, NULL, &sync_starts_on_gtw_init, NULL},
		{"sync_starts_on_run", SND_CONFIG_TYPE_INTEGER, NULL, &sync_starts_on_run, NULL},
		{"sync_starts_on_pause", SND_CONFIG_TYPE_INTEGER, NULL, &sync_starts_on_pause, NULL},
		{"sync_stops_on_pause", SND_CONFIG_TYPE_INTEGER, NULL, &sync_stops_on_pause, NULL},
		{"sync_stops_on_reset", SND_CONFIG_TYPE_INTEGER, NULL, &sync_stops_on_reset, NULL},
	};

	ret = find_set_values(&ssp_ext_data[0], ARRAY_SIZE(ssp_ext_data), cfg, top,
			      "Class.Base.ext_config");
	if (ret < 0)
		return ret;

	return ssp_ext_set_params(nhlt, mclk_policy_override, mclk_always_running,
				  mclk_starts_on_gtw_init, mclk_starts_on_run, mclk_starts_on_pause,
				  mclk_stops_on_pause, mclk_stops_on_reset,
				  bclk_policy_override, bclk_always_running,
				  bclk_starts_on_gtw_init, bclk_starts_on_run, bclk_starts_on_pause,
				  bclk_stops_on_pause, bclk_stops_on_reset,
				  sync_policy_override, sync_always_running,
				  sync_starts_on_gtw_init, sync_starts_on_run, sync_starts_on_pause,
				  sync_stops_on_pause, sync_stops_on_reset);
}

static int set_link_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	long clock_source;
	long ret;

	struct dai_values ssp_link_data[] = {
		{"clock_source", SND_CONFIG_TYPE_INTEGER, NULL, &clock_source, NULL},
	};

	ret = find_set_values(&ssp_link_data[0], ARRAY_SIZE(ssp_link_data), cfg, top,
			      "Class.Base.link_config");
	if (ret < 0)
		return ret;

	return ssp_link_set_params(nhlt, clock_source);
}

static int set_aux_params(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	struct aux_map {
		const char *name;
		int id;
	};

	struct aux_map aux_maps[] = {
		{ "Object.Base.mn_config", SSP_MN_DIVIDER_CONTROLS },
		{"Object.Base.clk_config", SSP_DMA_CLK_CONTROLS },
		{"Object.Base.tr_start_config", SSP_DMA_TRANSMISSION_START },
		{"Object.Base.tr_stop_config", SSP_DMA_TRANSMISSION_STOP },
		{"Object.Base.run_config", SSP_DMA_ALWAYS_RUNNING_MODE} ,
		{"Object.Base.sync_config", SSP_DMA_SYNC_DATA },
		{"Object.Base.ext_config", SSP_DMA_CLK_CONTROLS_EXT },
		{"Object.Base.link_config", SSP_LINK_CLK_SOURCE },
		{"Object.Base.node_config", SSP_DMA_SYNC_NODE },
	};

	snd_config_iterator_t iter, next;
	snd_config_t *items, *n;
	const char *id;
	int i, ret = 0;

	for (i = 0; i < ARRAY_SIZE(aux_maps); i++) {
		if (snd_config_search(cfg, aux_maps[i].name, &items) < 0)
			continue;

		snd_config_for_each(iter, next, items) {
			n = snd_config_iterator_entry(iter);

			if (snd_config_get_id(n, &id) < 0)
				continue;

			switch(aux_maps[i].id) {
			case SSP_MN_DIVIDER_CONTROLS:
				ret = set_mn_config(nhlt, n, top);
				break;
			case SSP_DMA_CLK_CONTROLS:
				ret = set_clk_config(nhlt, n, top);
				break;
			case SSP_DMA_TRANSMISSION_START:
				ret = set_tr_start_config(nhlt, n, top);
				break;
			case SSP_DMA_TRANSMISSION_STOP:
				ret = set_tr_stop_config(nhlt, n, top);
				break;
			case SSP_DMA_ALWAYS_RUNNING_MODE:
				ret = set_run_config(nhlt, n, top);
				break;
			case SSP_DMA_SYNC_DATA:
				ret = set_sync_config(nhlt, n, top);
				break;
			case SSP_DMA_CLK_CONTROLS_EXT:
				ret = set_ext_config(nhlt, n, top);
				break;
			case SSP_LINK_CLK_SOURCE:
				ret = set_link_config(nhlt, n, top);
				break;
			case SSP_DMA_SYNC_NODE:
				ret = set_node_config(nhlt, n, top);
				break;
			default:
				ret = -EINVAL;
			}

			if (ret < 0)
				return ret;
		}
	}

	return ret;
}

static int set_hw_config(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	const char *format = NULL;
	const char *mclk = NULL;
	const char *bclk = NULL;
	const char *bclk_invert = NULL;
	const char *fsync = NULL;
	const char *fsync_invert = NULL;
	long mclk_freq = 0;
	long bclk_freq = 0;
	long fsync_freq = 0;
	long tdm_slots = 0;
	long tdm_slot_width = 0;
	long tx_slots = 0;
	long rx_slots = 0;
	long ret;

	struct dai_values ssp_hw_data[] = {
		{"format", SND_CONFIG_TYPE_STRING, NULL, NULL, &format},
		{"mclk", SND_CONFIG_TYPE_STRING, NULL, NULL, &mclk},
		{"bclk", SND_CONFIG_TYPE_STRING, NULL, NULL, &bclk},
		{"fsync", SND_CONFIG_TYPE_STRING, NULL, NULL, &fsync},
		{"bclk_invert", SND_CONFIG_TYPE_STRING, NULL, NULL, &bclk_invert},
		{"fsync_invert", SND_CONFIG_TYPE_STRING, NULL, NULL, &fsync_invert},
		{"fsync_freq", SND_CONFIG_TYPE_INTEGER, NULL, &fsync_freq, NULL},
		{"bclk_freq", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_freq, NULL},
		{"mclk_freq", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_freq, NULL},
		{"tdm_slots", SND_CONFIG_TYPE_INTEGER, NULL, &tdm_slots, NULL},
		{"tdm_slot_width", SND_CONFIG_TYPE_INTEGER, NULL, &tdm_slot_width, NULL},
		{"tx_slots", SND_CONFIG_TYPE_INTEGER, NULL, &tx_slots, NULL},
		{"rx_slots", SND_CONFIG_TYPE_INTEGER, NULL, &rx_slots, NULL},
	};

	ret = find_set_values(&ssp_hw_data[0], ARRAY_SIZE(ssp_hw_data), cfg, top,
			      "Class.Base.hw_config");
	if (ret < 0)
		return ret;

	ret = set_aux_params(nhlt, cfg, top);
	if (ret < 0)
		return ret;

	return ssp_hw_set_params(nhlt, format, mclk, bclk, bclk_invert, fsync, fsync_invert,
				 mclk_freq, bclk_freq, fsync_freq, tdm_slots, tdm_slot_width,
				 tx_slots, rx_slots);
}

static int set_ssp_data(struct intel_nhlt_params *nhlt, snd_config_t *dai_cfg, snd_config_t *top)
{
	const char *tdm_padding_per_slot = NULL;
	const char *direction = NULL;
	const char *quirks = NULL;
	long frame_pulse_width = 0;
	long clks_control = 0;
	long sample_bits = 0;
	long bclk_delay = 0;
	long version = 0;
	long dai_index = 0;
	long mclk_id = 0;
	long io_clk = 0;
	int ret;

	struct dai_values ssp_data[] = {
		{ "io_clk",  SND_CONFIG_TYPE_INTEGER, NULL, &io_clk, NULL},
		{ "direction", SND_CONFIG_TYPE_STRING, NULL, NULL, &direction},
		{ "quirks", SND_CONFIG_TYPE_STRING, NULL, NULL, &quirks},
		{ "dai_index", SND_CONFIG_TYPE_INTEGER, NULL, &dai_index, NULL},
		{ "sample_bits", SND_CONFIG_TYPE_INTEGER, NULL, &sample_bits, NULL},
		{ "bclk_delay", SND_CONFIG_TYPE_INTEGER, NULL, &bclk_delay, NULL},
		{ "mclk_id", SND_CONFIG_TYPE_INTEGER, NULL, &mclk_id, NULL},
		{ "clks_control", SND_CONFIG_TYPE_INTEGER, NULL, &clks_control, NULL},
		{ "frame_pulse_width", SND_CONFIG_TYPE_INTEGER, NULL, &frame_pulse_width, NULL},
		{ "tdm_padding_per_slot", SND_CONFIG_TYPE_STRING, NULL, NULL,
		  &tdm_padding_per_slot},
		{ "version", SND_CONFIG_TYPE_INTEGER, NULL, &version, NULL},
	};

	ret = find_set_values(&ssp_data[0], ARRAY_SIZE(ssp_data), dai_cfg, top, "Class.Dai.SSP");
	if (ret < 0)
		return ret;

	return ssp_set_params(nhlt, direction, dai_index, io_clk, bclk_delay, sample_bits, mclk_id,
			      clks_control, frame_pulse_width, tdm_padding_per_slot, quirks,
			      version);
}

/* init ssp parameters, should be called before parsing dais */
int nhlt_ssp_init_params(struct intel_nhlt_params *nhlt)
{
	return ssp_init_params(nhlt);
}

int nhlt_ssp_get_ep_count(struct intel_nhlt_params *nhlt)
{
	return ssp_get_vendor_blob_count(nhlt);
}

int nhlt_ssp_get_dir(struct intel_nhlt_params *nhlt, int dai_index, uint8_t *dir)
{
	return ssp_get_dir(nhlt, dai_index, dir);
}

int nhlt_ssp_get_ep(struct intel_nhlt_params *nhlt, struct endpoint_descriptor **eps,
		    int dai_index, uint8_t dir)
{
	struct endpoint_descriptor ep;
	struct ssp_device_specific_config ssp_conf;
	struct formats_config f_conf;
	struct format_config f_conf1[8];
	uint32_t sample_rate;
	uint16_t channel_count;
	uint32_t bits_per_sample;
	uint32_t virtualbus_id;
	uint32_t formats_count;
	uint32_t device_type;
	uint32_t direction = dir;
	uint8_t *ep_target;
	size_t blob_size;
	int ret;
	int i;

	/*
	 * nhlt ssp structure:
	 *
	 * endpoint_descriptor, sizeof(struct endpoint_descriptor)
	 * device_specific_config (headset), sizeof(struct ssp_device_specific_config)
	 * formats_config (formats_count), sizeof(struct formats_config)
	 * format_config (waveex), sizeof(struct format_config)
	 * vendor_blob sizeof(vendor_blob)
	 */

	ret = ssp_get_params(nhlt, dai_index, &virtualbus_id, &formats_count,
			     &device_type, &direction);
	if (ret < 0) {
		fprintf(stderr, "nhlt_ssp_get_ep: ssp_get_params failed\n");
		return ret;
	}

	ep.link_type = NHLT_LINK_TYPE_SSP;
	ep.instance_id = 0;
	ep.vendor_id = NHLT_VENDOR_ID_INTEL;
	ep.device_id = NHLT_DEVICE_ID_INTEL_I2S_TDM;
	ep.revision_id = 0;
	ep.subsystem_id = 0;
	ep.device_type = device_type;

	ep.direction = direction;
	/* ssp device index */
	ep.virtualbus_id = virtualbus_id;
	/* ssp config */
	ssp_conf.config.capabilities_size = 2;
	ssp_conf.device_config.virtual_slot = 0;
	ssp_conf.device_config.config_type = 0;

	/* formats_config */
	f_conf.formats_count = formats_count;

	for (i = 0; i < f_conf.formats_count; i++) {
		/* fill in wave format extensible types */
		f_conf1[i].format.wFormatTag = 0xFFFE;

		ret = ssp_get_hw_params(nhlt, dai_index, i, &sample_rate, &channel_count,
					&bits_per_sample);

		if (ret < 0) {
			fprintf(stderr, "nhlt_ssp_get_ep: ssp_get_hw_params failed\n");
			return ret;
		}

		f_conf1[i].format.nChannels = channel_count;
		f_conf1[i].format.nSamplesPerSec = sample_rate;
		f_conf1[i].format.wBitsPerSample = bits_per_sample;
		f_conf1[i].format.nBlockAlign = channel_count * bits_per_sample / 8;
		f_conf1[i].format.nAvgBytesPerSec = sample_rate * f_conf1[i].format.nBlockAlign;

		/* bytes after this value in this struct */
		f_conf1[i].format.cbSize = 22;
		/* actual bits in container */
		f_conf1[i].format.wValidBitsPerSample = bits_per_sample;
		/* channel map not used at this time */
		f_conf1[i].format.dwChannelMask = 0;
		/* WAVE_FORMAT_PCM guid (0x0001) ? */
		f_conf1[i].format.SubFormat[0] = 0;
		f_conf1[i].format.SubFormat[1] = 0;
		f_conf1[i].format.SubFormat[2] = 0;
		f_conf1[i].format.SubFormat[3] = 0;

		ret = ssp_get_vendor_blob_size(nhlt, dai_index, i, &blob_size);
		if (ret < 0) {
			fprintf(stderr, "nhlt_ssp_get_ep: dmic_get_vendor_blob_size failed\n");
			return ret;
		}
		f_conf1[i].vendor_blob.capabilities_size = blob_size;
	}

	ep.length = sizeof(struct endpoint_descriptor) +
		sizeof(struct ssp_device_specific_config) +
		sizeof(struct formats_config) +
		sizeof(struct format_config) * f_conf.formats_count +
		blob_size * f_conf.formats_count;

	/* allocate the final variable length ep struct */
	ep_target = calloc(ep.length, sizeof(uint8_t));
	if (!ep_target)
		return -ENOMEM;

	*eps = (struct endpoint_descriptor *)ep_target;

	/* copy all parsed sub arrays into the top level array */
	memcpy(ep_target, &ep, sizeof(struct endpoint_descriptor));

	ep_target += sizeof(struct endpoint_descriptor);

	memcpy(ep_target, &ssp_conf, sizeof(struct ssp_device_specific_config));
	ep_target += sizeof(struct ssp_device_specific_config);

	memcpy(ep_target, &f_conf, sizeof(struct formats_config));
	ep_target += sizeof(struct formats_config);

	/* copy all hw configs */
	for (i = 0; i < f_conf.formats_count; i++) {
		memcpy(ep_target, &f_conf1[i], sizeof(struct format_config));
		ep_target += sizeof(struct format_config);
		ret = ssp_get_vendor_blob(nhlt, ep_target, dai_index, i);
		if (ret < 0) {
			fprintf(stderr, "nhlt_sso_get_ep: ssp_get_vendor_blob failed\n");
			return ret;
		}
		ep_target += blob_size;
	}

	return 0;
}

/* Set ssp parameters from topology for ssp coefficient calculation.
 *
 * You can see an example of topology v2 config of ssp below. In this example the default
 * object parameters are spelled out for clarity. General parameters like sample_bits are parsed
 * with set_ssp_data and hw_config object data with set_hw_data. Ssp can have multiple hw_configs.
 * Values are saved into intermediate structs and the vendor specific blob is calculated at the end
 * of parsing with ssp_calculate.
 *
 * 	SSP."0" {
 *		id 			0
 *		direction		"duplex"
 *		name			NoCodec-0
 *		io_clk			38400000
 *		default_hw_conf_id	0
 *		sample_bits		16
 *		quirks			"lbm_mode"
 *		bclk_delay		0
 *		mclk_id 		0
 *		clks_control 		0
 *		frame_pulse_width	0
 *		tdm_padding_per_slot	false
 *
 *		Object.Base.hw_config."SSP0" {
 *			id	0
 *			mclk_freq	24576000
 *			bclk_freq	3072000
 *			tdm_slot_width	32
 *			format		"I2S"
 *			mclk		"codec_mclk_in"
 *			bclk		"codec_consumer"
 *			fsync		"codec_consumer"
 *			fsync_freq	48000
 *			tdm_slots	2
 *			tx_slots	3
 *			rx_slots	3
 *		}
 *	}
 */
int nhlt_ssp_set_params(struct intel_nhlt_params *nhlt, snd_config_t *cfg, snd_config_t *top)
{
	snd_config_iterator_t i, next;
	snd_config_t *items;
	snd_config_t *n;
	const char *id;
	int ret;

	ret = set_ssp_data(nhlt, cfg, top);
	if (ret < 0)
		return ret;

	ret = snd_config_search(cfg, "Object.Base.hw_config", &items);
	if (ret < 0)
		return ret;

	snd_config_for_each(i, next, items) {
		n = snd_config_iterator_entry(i);

		if (snd_config_get_id(n, &id) < 0)
			continue;

		ret = set_hw_config(nhlt, n, top);
		if (ret < 0)
			return ret;
	}

	ret = ssp_calculate(nhlt);

	return ret;
}