167 lines
4.7 KiB
C
167 lines
4.7 KiB
C
/* hci_core.h - Bluetooth HCI core access */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <atomic.h>
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#include <stdbool.h>
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#include <arch/cpu.h>
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#include <bluetooth/driver.h>
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/* Enabling debug increases stack size requirement considerably */
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#if defined(CONFIG_BLUETOOTH_DEBUG)
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#define BT_STACK_DEBUG_EXTRA 512
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#else
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#define BT_STACK_DEBUG_EXTRA 0
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#endif
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#define BT_STACK(name, size) \
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char __stack name[(size) + BT_STACK_DEBUG_EXTRA]
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#define BT_STACK_NOINIT(name, size) \
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char __noinit __stack name[(size) + BT_STACK_DEBUG_EXTRA]
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/* LMP feature helpers */
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#define lmp_bredr_capable(dev) (!((dev).features[4] & BT_LMP_NO_BREDR))
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#define lmp_le_capable(dev) ((dev).features[4] & BT_LMP_LE)
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/* bt_dev flags: the flags defined here represent BT controller state */
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enum {
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BT_DEV_ADVERTISING,
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BT_DEV_SCANNING,
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BT_DEV_SCAN_FILTER_DUP,
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};
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/* State tracking for the local Bluetooth controller */
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struct bt_dev {
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/* Local Bluetooth Device Address */
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bt_addr_t bdaddr;
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/* Controller version & manufacturer information */
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uint8_t hci_version;
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uint16_t hci_revision;
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uint16_t manufacturer;
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/* BR/EDR features page 0 */
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uint8_t features[8];
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/* LE features */
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uint8_t le_features[8];
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atomic_t flags[1];
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/* Controller buffer information */
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uint8_t le_pkts;
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uint16_t le_mtu;
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struct nano_sem le_pkts_sem;
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/* Number of commands controller can accept */
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uint8_t ncmd;
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struct nano_sem ncmd_sem;
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/* Last sent HCI command */
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struct bt_buf *sent_cmd;
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/* Queue for incoming HCI events & ACL data */
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struct nano_fifo rx_queue;
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/* Queue for high priority HCI events which may unlock waiters
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* in other fibers. Such events include Number of Completed
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* Packets, as well as the Command Complete/Status events.
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*/
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struct nano_fifo rx_prio_queue;
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/* Queue for outgoing HCI commands */
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struct nano_fifo cmd_tx_queue;
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/* Registered HCI driver */
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struct bt_driver *drv;
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};
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extern struct bt_dev bt_dev;
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static inline int bt_addr_cmp(const bt_addr_t *a, const bt_addr_t *b)
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{
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return memcmp(a, b, sizeof(*a));
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}
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static inline int bt_addr_le_cmp(const bt_addr_le_t *a, const bt_addr_le_t *b)
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{
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return memcmp(a, b, sizeof(*a));
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}
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static inline void bt_addr_copy(bt_addr_t *dst, const bt_addr_t *src)
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{
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memcpy(dst, src, sizeof(*dst));
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}
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static inline void bt_addr_le_copy(bt_addr_le_t *dst, const bt_addr_le_t *src)
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{
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memcpy(dst, src, sizeof(*dst));
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}
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static inline bool bt_addr_le_is_rpa(const bt_addr_le_t *addr)
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{
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if (addr->type != BT_ADDR_LE_RANDOM)
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return false;
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if ((addr->val[5] & 0xc0) == 0x40)
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return true;
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return false;
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}
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static inline bool bt_addr_le_is_identity(const bt_addr_le_t *addr)
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{
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if (addr->type == BT_ADDR_LE_PUBLIC)
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return true;
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/* Check for Random Static address type */
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if ((addr->val[5] & 0xc0) == 0xc0)
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return true;
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return false;
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}
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struct bt_buf *bt_hci_cmd_create(uint16_t opcode, uint8_t param_len);
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int bt_hci_cmd_send(uint16_t opcode, struct bt_buf *buf);
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int bt_hci_cmd_send_sync(uint16_t opcode, struct bt_buf *buf,
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struct bt_buf **rsp);
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/* The helper is only safe to be called from internal fibers as it's
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* not multi-threading safe
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*/
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#if defined(CONFIG_BLUETOOTH_DEBUG)
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const char *bt_addr_str(const bt_addr_t *addr);
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const char *bt_addr_le_str(const bt_addr_le_t *addr);
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#endif
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int bt_le_scan_update(void);
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