/*
 * Copyright (c) 2020 Demant
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr.h>
#include <soc.h>

#include "hal/cpu.h"
#include "hal/ccm.h"

#include "util/memq.h"
#include "util/mem.h"
#include "util/mfifo.h"

#include "pdu.h"

#include "lll.h"
#include "lll_conn.h" /* for `struct lll_tx` */

#define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HCI_DRIVER)
#define LOG_MODULE_NAME bt_ctlr_ull_iso
#include "common/log.h"
#include "hal/debug.h"

static int init_reset(void);

static MFIFO_DEFINE(iso_tx, sizeof(struct lll_tx),
		    CONFIG_BT_CTLR_ISO_TX_BUFFERS);

static struct {
	void *free;
	uint8_t pool[CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE *
			CONFIG_BT_CTLR_ISO_TX_BUFFERS];
} mem_iso_tx;

/* Contains vendor specific argument, function to be implemented by vendors */
__weak uint8_t ll_configure_data_path(uint8_t data_path_dir,
			       uint8_t data_path_id,
			       uint8_t vs_config_len,
			       uint8_t *vs_config)
{
	ARG_UNUSED(data_path_dir);
	ARG_UNUSED(data_path_id);
	ARG_UNUSED(vs_config_len);
	ARG_UNUSED(vs_config);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_read_iso_tx_sync(uint16_t handle, uint16_t *seq,
			    uint32_t *timestamp, uint32_t *offset)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(seq);
	ARG_UNUSED(timestamp);
	ARG_UNUSED(offset);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_setup_iso_path(uint16_t handle, uint8_t path_dir, uint8_t path_id,
			  uint8_t coding_format, uint16_t company_id,
			  uint16_t vs_codec_id, uint32_t controller_delay,
			  uint8_t codec_config_len, uint8_t *codec_config)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(path_dir);
	ARG_UNUSED(path_id);
	ARG_UNUSED(coding_format);
	ARG_UNUSED(company_id);
	ARG_UNUSED(vs_codec_id);
	ARG_UNUSED(controller_delay);
	ARG_UNUSED(codec_config_len);
	ARG_UNUSED(codec_config);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_remove_iso_path(uint16_t handle, uint8_t path_dir)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(path_dir);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_iso_receive_test(uint16_t handle, uint8_t payload_type)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(payload_type);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_iso_transmit_test(uint16_t handle, uint8_t payload_type)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(payload_type);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_iso_test_end(uint16_t handle, uint32_t *received_cnt,
			uint32_t *missed_cnt, uint32_t *failed_cnt)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(received_cnt);
	ARG_UNUSED(missed_cnt);
	ARG_UNUSED(failed_cnt);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_iso_read_test_counters(uint16_t handle, uint32_t *received_cnt,
				  uint32_t *missed_cnt,
				  uint32_t *failed_cnt)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(received_cnt);
	ARG_UNUSED(missed_cnt);
	ARG_UNUSED(failed_cnt);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

uint8_t ll_read_iso_link_quality(uint16_t  handle,
				 uint32_t *tx_unacked_packets,
				 uint32_t *tx_flushed_packets,
				 uint32_t *tx_last_subevent_packets,
				 uint32_t *retransmitted_packets,
				 uint32_t *crc_error_packets,
				 uint32_t *rx_unreceived_packets,
				 uint32_t *duplicate_packets)
{
	ARG_UNUSED(handle);
	ARG_UNUSED(tx_unacked_packets);
	ARG_UNUSED(tx_flushed_packets);
	ARG_UNUSED(tx_last_subevent_packets);
	ARG_UNUSED(retransmitted_packets);
	ARG_UNUSED(crc_error_packets);
	ARG_UNUSED(rx_unreceived_packets);
	ARG_UNUSED(duplicate_packets);

	return BT_HCI_ERR_CMD_DISALLOWED;
}

int ull_iso_init(void)
{
	int err;

	err = init_reset();
	if (err) {
		return err;
	}

	return 0;
}

int ull_iso_reset(void)
{
	int err;

	/* Re-initialize the Tx mfifo */
	MFIFO_INIT(iso_tx);

	err = init_reset();
	if (err) {
		return err;
	}

	return 0;
}

void *ll_iso_tx_mem_acquire(void)
{
	return mem_acquire(&mem_iso_tx.free);
}

void ll_iso_tx_mem_release(void *tx)
{
	mem_release(tx, &mem_iso_tx.free);
}

int ll_iso_tx_mem_enqueue(uint16_t handle, void *tx)
{
	struct lll_tx *lll_tx;
	uint8_t idx;

	idx = MFIFO_ENQUEUE_GET(iso_tx, (void **) &lll_tx);
	if (!lll_tx) {
		return -ENOBUFS;
	}

	lll_tx->handle = handle;
	lll_tx->node = tx;

	MFIFO_ENQUEUE(iso_tx, idx);

	return 0;
}

static int init_reset(void)
{
	/* Initialize tx pool. */
	mem_init(mem_iso_tx.pool, CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE,
		 CONFIG_BT_CTLR_ISO_TX_BUFFERS, &mem_iso_tx.free);

	return 0;
}