/*
 * Copyright (c) 2018-2019 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#if defined(CONFIG_BT_CTLR_CONN_META)
#include "lll_conn_meta.h"
#endif /* CONFIG_BT_CTLR_CONN_META */

#define LLL_CONN_RSSI_SAMPLE_COUNT 10
#define LLL_CONN_RSSI_THRESHOLD    4

#define LLL_CONN_MIC_NONE 0
#define LLL_CONN_MIC_PASS 1
#define LLL_CONN_MIC_FAIL 2

struct lll_tx {
	uint16_t handle;
	void *node;
};

struct node_tx {
	union {
		void        *next;
		memq_link_t *link;
	};

	uint8_t pdu[];
};

#if defined(CONFIG_BT_CTLR_DATA_LENGTH)
struct data_pdu_length {
	uint16_t max_tx_octets;
	uint16_t max_rx_octets;
	uint16_t max_tx_time;
	uint16_t max_rx_time;
};
#endif /* CONFIG_BT_CTLR_DATA_LENGTH */

struct lll_conn {
	struct lll_hdr hdr;

	uint8_t access_addr[4];
	uint8_t crc_init[3];

	uint16_t tifs_tx_us;
	uint16_t tifs_rx_us;
	uint16_t tifs_hcto_us;
	uint16_t tifs_cis_us;

	uint16_t handle;
	uint16_t interval;

	uint16_t latency;
	uint16_t latency_prepare;
	uint16_t lazy_prepare;
	uint16_t latency_event;
	uint16_t event_counter;

	uint8_t data_chan_map[PDU_CHANNEL_MAP_SIZE];
	uint8_t data_chan_count:6;
	uint8_t data_chan_sel:1;
	uint8_t role:1;

	union {
		struct {
			uint8_t data_chan_hop;
			uint8_t data_chan_use;
		};

		uint16_t data_chan_id;
	};

	union {
		struct {
			uint8_t initiated:1;
			uint8_t cancelled:1;
			uint8_t forced:1;
		};

		struct {
			uint8_t initiated:1;
			uint8_t cancelled:1;
			uint8_t forced:1;
		} central;

#if defined(CONFIG_BT_PERIPHERAL)
		struct {
			uint8_t  initiated:1;
			uint8_t  cancelled:1;
			uint8_t  forced:1;
			uint8_t  latency_enabled:1;

			uint32_t window_widening_periodic_us;
			uint32_t window_widening_max_us;
			uint32_t window_widening_prepare_us;
			uint32_t window_widening_event_us;
			uint32_t window_size_prepare_us;
			uint32_t window_size_event_us;
		} periph;
#endif /* CONFIG_BT_PERIPHERAL */
	};

#if defined(CONFIG_BT_CTLR_DATA_LENGTH)
	struct {
		struct data_pdu_length local;
		struct data_pdu_length remote;
		struct data_pdu_length eff;
#if defined(CONFIG_BT_CTLR_PHY)
		uint16_t default_tx_time;
#endif
		uint16_t default_tx_octets;
		uint8_t update;
	} dle;
#endif /* CONFIG_BT_CTLR_DATA_LENGTH */

#if defined(CONFIG_BT_CTLR_PHY)
	uint8_t phy_tx:3;
	uint8_t phy_flags:1;
	uint8_t phy_tx_time:3;
	uint8_t phy_rx:3;
#endif /* CONFIG_BT_CTLR_PHY */

	MEMQ_DECLARE(tx);
	memq_link_t link_tx;
	memq_link_t *link_tx_free;
	uint8_t  packet_tx_head_len;
	uint8_t  packet_tx_head_offset;

	uint8_t sn:1;
	uint8_t nesn:1;
	uint8_t empty:1;

#if defined(CONFIG_BT_CTLR_LE_ENC)
	uint8_t enc_rx:1;
	uint8_t enc_tx:1;

	struct ccm ccm_rx;
	struct ccm ccm_tx;
#endif /* CONFIG_BT_CTLR_LE_ENC */

#if defined(CONFIG_BT_CTLR_SLOT_RESERVATION_UPDATE)
#if defined(CONFIG_BT_CTLR_DATA_LENGTH) || defined(CONFIG_BT_CTLR_PHY)
	uint8_t evt_len_upd:1;
	uint8_t evt_len_upd_delayed:1;
#endif /* CONFIG_BT_CTLR_DATA_LENGTH || CONFIG_BT_CTLR_PHY */
#endif /* CONFIG_BT_CTLR_SLOT_RESERVATION_UPDATE */

#if defined(CONFIG_BT_CTLR_CONN_RSSI)
	uint8_t  rssi_latest;
#if defined(CONFIG_BT_CTLR_CONN_RSSI_EVENT)
	uint8_t  rssi_reported;
	uint8_t  rssi_sample_count;
#endif /* CONFIG_BT_CTLR_CONN_RSSI_EVENT */
#endif /* CONFIG_BT_CTLR_CONN_RSSI */

#if defined(CONFIG_BT_CTLR_CONN_META)
	struct lll_conn_meta conn_meta;
#endif /* CONFIG_BT_CTLR_CONN_META */

#if defined(CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL)
	int8_t tx_pwr_lvl;
#endif

#if defined(CONFIG_BT_CTLR_DF_CONN_CTE_RX)
	struct lll_df_conn_rx_cfg df_rx_cfg;
#endif /* CONFIG_BT_CTLR_DF_CONN_CTE_RX */
#if defined(CONFIG_BT_CTLR_DF_CONN_CTE_TX)
	struct lll_df_conn_tx_cfg df_tx_cfg;
#endif /* CONFIG_BT_CTLR_DF_CONN_CTE_TX */
};

int lll_conn_init(void);
int lll_conn_reset(void);
void lll_conn_flush(uint16_t handle, struct lll_conn *lll);

void lll_conn_prepare_reset(void);
int lll_conn_central_is_abort_cb(void *next, void *curr,
				 lll_prepare_cb_t *resume_cb);
int lll_conn_peripheral_is_abort_cb(void *next, void *curr,
				    lll_prepare_cb_t *resume_cb);
void lll_conn_abort_cb(struct lll_prepare_param *prepare_param, void *param);
void lll_conn_isr_rx(void *param);
void lll_conn_isr_tx(void *param);
void lll_conn_rx_pkt_set(struct lll_conn *lll);
void lll_conn_tx_pkt_set(struct lll_conn *lll, struct pdu_data *pdu_data_tx);
void lll_conn_pdu_tx_prep(struct lll_conn *lll, struct pdu_data **pdu_data_tx);
uint8_t lll_conn_force_md_cnt_set(uint8_t force_md_cnt);

extern struct lll_conn *ull_conn_lll_get(uint16_t handle);
extern void ull_conn_lll_tx_demux_sched(struct lll_conn *lll);
extern void ull_conn_lll_ack_enqueue(uint16_t handle, struct node_tx *tx);
extern uint16_t ull_conn_lll_max_tx_octets_get(struct lll_conn *lll);