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/******************************************************************************
*
* Copyright (C) 2009-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#ifndef BT_HCI_LIB_H
#define BT_HCI_LIB_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
/** Struct types */
/** Typedefs and defines */
/* Generic purpose transac returned upon request complete */
typedef void* TRANSAC;
/** Bluetooth Power Control States */
typedef enum {
BT_HC_CHIP_PWR_OFF,
BT_HC_CHIP_PWR_ON,
} bt_hc_chip_power_state_t;
/** Bluetooth Low Power Mode */
typedef enum {
BT_HC_LPM_DISABLE,
BT_HC_LPM_ENABLE,
BT_HC_LPM_WAKE_ASSERT,
BT_HC_LPM_WAKE_DEASSERT,
} bt_hc_low_power_event_t;
/** Receive flow control */
typedef enum {
BT_RXFLOW_OFF, /* add transport device fd to select set */
BT_RXFLOW_ON, /* remove transport device to from select set */
} bt_rx_flow_state_t;
/** HCI logging control */
typedef enum {
BT_HC_LOGGING_OFF,
BT_HC_LOGGING_ON,
} bt_hc_logging_state_t;
/** Result of write request */
typedef enum {
BT_HC_TX_SUCCESS, /* a buffer is fully processed and can be released */
BT_HC_TX_FAIL, /* transmit fail */
BT_HC_TX_FRAGMENT, /* send split ACL pkt back to stack to reprocess */
} bt_hc_transmit_result_t;
/** Result of preload initialization */
typedef enum {
BT_HC_PRELOAD_SUCCESS,
BT_HC_PRELOAD_FAIL,
} bt_hc_preload_result_t;
/** Result of postload initialization */
typedef enum {
BT_HC_POSTLOAD_SUCCESS,
BT_HC_POSTLOAD_FAIL,
} bt_hc_postload_result_t;
/** Result of low power enable/disable request */
typedef enum {
BT_HC_LPM_DISABLED,
BT_HC_LPM_ENABLED,
} bt_hc_lpm_request_result_t;
/** Host/Controller Library Return Status */
typedef enum {
BT_HC_STATUS_SUCCESS,
BT_HC_STATUS_FAIL,
BT_HC_STATUS_NOT_READY,
BT_HC_STATUS_NOMEM,
BT_HC_STATUS_BUSY,
BT_HC_STATUS_CORRUPTED_BUFFER
} bt_hc_status_t;
/* Section comment */
/*
* Bluetooth Host/Controller callback structure.
*/
/* called upon bt host wake signal */
typedef void (*hostwake_ind_cb)(bt_hc_low_power_event_t event);
/* preload initialization callback */
typedef void (*preload_result_cb)(TRANSAC transac, bt_hc_preload_result_t result);
/* postload initialization callback */
typedef void (*postload_result_cb)(TRANSAC transac, bt_hc_postload_result_t result);
/* lpm enable/disable callback */
typedef void (*lpm_result_cb)(bt_hc_lpm_request_result_t result);
/* datapath buffer allocation callback (callout) */
typedef char* (*alloc_mem_cb)(int size);
/* datapath buffer deallocation callback (callout) */
typedef int (*dealloc_mem_cb)(TRANSAC transac, char *p_buf);
/* transmit result callback */
typedef int (*tx_result_cb)(TRANSAC transac, char *p_buf, bt_hc_transmit_result_t result);
/* a previously setup buffer is read and available for processing
buffer is deallocated in stack when processed */
typedef int (*data_ind_cb)(TRANSAC transac, char *p_buf, int len);
typedef struct {
/** set to sizeof(bt_hc_callbacks_t) */
size_t size;
/* notifies caller result of preload request */
preload_result_cb preload_cb;
/* notifies caller result of postload request */
postload_result_cb postload_cb;
/* notifies caller result of lpm enable/disable */
lpm_result_cb lpm_cb;
/* notifies hardware on host wake state */
hostwake_ind_cb hostwake_ind;
/* buffer allocation request */
alloc_mem_cb alloc;
/* buffer deallocation request */
dealloc_mem_cb dealloc;
/* notifies stack data is available */
data_ind_cb data_ind;
/* notifies caller when a buffer is transmitted (or failed) */
tx_result_cb tx_result;
} bt_hc_callbacks_t;
/*
* Bluetooth Host/Controller Interface
*/
typedef struct {
/** Set to sizeof(bt_hc_interface_t) */
size_t size;
/**
* Opens the interface and provides the callback routines
* to the implemenation of this interface.
*/
int (*init)(const bt_hc_callbacks_t* p_cb, unsigned char *local_bdaddr);
/** Chip power control */
void (*set_power)(bt_hc_chip_power_state_t state);
/** Set low power mode wake */
int (*lpm)(bt_hc_low_power_event_t event);
/** Called prior to stack initialization */
void (*preload)(TRANSAC transac);
/** Called post stack initialization */
void (*postload)(TRANSAC transac);
/** Transmit buffer */
int (*transmit_buf)(TRANSAC transac, char *p_buf, int len);
/** Controls receive flow */
int (*set_rxflow)(bt_rx_flow_state_t state);
/** Controls HCI logging on/off */
int (*logging)(bt_hc_logging_state_t state, char *p_path);
/** Closes the interface */
void (*cleanup)( void );
} bt_hc_interface_t;
/*
* External shared lib functions
*/
extern const bt_hc_interface_t* bt_hc_get_interface(void);
#endif /* BT_HCI_LIB_H */
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