/* hci_core.h - Bluetooth HCI core access */

/*
 * Copyright (c) 2015 Intel Corporation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1) Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2) Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3) Neither the name of Intel Corporation nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/* LMP feature helpers */
#define lmp_bredr_capable(dev)	(!((dev).features[4] & BT_LMP_NO_BREDR))
#define lmp_le_capable(dev)	((dev).features[4] & BT_LMP_LE)

/* State tracking for the local Bluetooth controller */
struct bt_dev {
	/* Local Bluetooth Device Address */
	uint8_t			bdaddr[6];

	/* Controller version & manufacturer information */
	uint8_t			hci_version;
	uint16_t		hci_revision;
	uint16_t		manufacturer;

	/* BR/EDR features page 0 */
	uint8_t			features[8];

	/* LE features */
	uint8_t			le_features[8];

	/* Advertising state */
	uint8_t                 adv_enable;

	/* Scanning state */
	uint8_t			scan_enable;

	/* Controller buffer information */
	uint8_t			le_pkts;
	uint16_t		le_mtu;
	struct nano_sem		le_pkts_sem;

	/* Number of commands controller can accept */
	uint8_t			ncmd;
	struct nano_sem		ncmd_sem;

	/* Last sent HCI command */
	struct bt_buf		*sent_cmd;

	/* Queue for incoming HCI events & ACL data */
	struct nano_fifo	rx_queue;

	/* Queue for outgoing HCI commands */
	struct nano_fifo	cmd_tx_queue;

	/* Registered HCI driver */
	struct bt_driver	*drv;
};

struct bt_ltk {
	uint64_t		rand;
	uint16_t		ediv;
	uint8_t			val[16];
};

struct bt_keys {
	uint8_t			bdaddr[6];
	uint8_t			bdaddr_type;

	struct bt_ltk		slave_ltk;
};

struct bt_keys *bt_keys_create(uint8_t bdaddr[6], uint8_t bdaddr_type);
struct bt_keys *bt_keys_find(uint8_t bdaddr[6], uint8_t bdaddr_type);
void bt_keys_clear(struct bt_keys *keys);

struct bt_buf *bt_hci_cmd_create(uint16_t opcode, uint8_t param_len);
int bt_hci_cmd_send(uint16_t opcode, struct bt_buf *buf);
int bt_hci_cmd_send_sync(uint16_t opcode, struct bt_buf *buf,
			 struct bt_buf **rsp);

/* The helper is only safe to be called from internal fibers as it's
 * not multi-threading safe
 */
const char *bt_bdaddr_str(const uint8_t bdaddr[6]);