/******************************************************************************
*
* 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_VENDOR_LIB_H
#define BT_VENDOR_LIB_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
/** Struct types */
/** Typedefs and defines */
/** Vendor specific operations OPCODE */
typedef enum {
/* [operation]
* Power on or off the BT Controller.
* [input param]
* A pointer to int type with content of bt_vendor_power_state_t.
* Typecasting conversion: (int *) param.
* [return]
* 0 - default, don't care.
* [callback]
* None.
*/
BT_VND_OP_POWER_CTRL,
/* [operation]
* Perform any vendor specific initialization or configuration
* on the BT Controller. This is called before stack initialization.
* [input param]
* None.
* [return]
* 0 - default, don't care.
* [callback]
* Must call fwcfg_cb to notify the stack of the completion of vendor
* specific initialization once it has been done.
*/
BT_VND_OP_FW_CFG,
/* [operation]
* Perform any vendor specific SCO/PCM configuration on the BT Controller.
* This is called after stack initialization.
* [input param]
* None.
* [return]
* 0 - default, don't care.
* [callback]
* Must call scocfg_cb to notify the stack of the completion of vendor
* specific SCO configuration once it has been done.
*/
BT_VND_OP_SCO_CFG,
/* [operation]
* Open UART port on where the BT Controller is attached.
* This is called before stack initialization.
* [input param]
* A pointer to int array type for open file descriptors.
* The mapping of HCI channel to fd slot in the int array is given in
* bt_vendor_hci_channels_t.
* And, it requires the vendor lib to fill up the content before returning
* the call.
* Typecasting conversion: (int (*)[]) param.
* [return]
* Numbers of opened file descriptors.
* Valid number:
* 1 - CMD/EVT/ACL-In/ACL-Out via the same fd (e.g. UART)
* 2 - CMD/EVT on one fd, and ACL-In/ACL-Out on the other fd
* 4 - CMD, EVT, ACL-In, ACL-Out are on their individual fd
* [callback]
* None.
*/
BT_VND_OP_USERIAL_OPEN,
/* [operation]
* Close the previously opened UART port.
* [input param]
* None.
* [return]
* 0 - default, don't care.
* [callback]
* None.
*/
BT_VND_OP_USERIAL_CLOSE,
/* [operation]
* Get the LPM idle timeout in milliseconds.
* The stack uses this information to launch a timer delay before it
* attempts to de-assert LPM WAKE signal once downstream HCI packet
* has been delivered.
* [input param]
* A pointer to uint32_t type which is passed in by the stack. And, it
* requires the vendor lib to fill up the content before returning
* the call.
* Typecasting conversion: (uint32_t *) param.
* [return]
* 0 - default, don't care.
* [callback]
* None.
*/
BT_VND_OP_GET_LPM_IDLE_TIMEOUT,
/* [operation]
* Enable or disable LPM mode on BT Controller.
* [input param]
* A pointer to uint8_t type with content of bt_vendor_lpm_mode_t.
* Typecasting conversion: (uint8_t *) param.
* [return]
* 0 - default, don't care.
* [callback]
* Must call lpm_cb to notify the stack of the completion of LPM
* disable/enable process once it has been done.
*/
BT_VND_OP_LPM_SET_MODE,
/* [operation]
* Assert or Deassert LPM WAKE on BT Controller.
* [input param]
* A pointer to uint8_t type with content of bt_vendor_lpm_wake_state_t.
* Typecasting conversion: (uint8_t *) param.
* [return]
* 0 - default, don't care.
* [callback]
* None.
*/
BT_VND_OP_LPM_WAKE_SET_STATE,
/* [operation]
* Perform any vendor specific commands related to audio state changes.
* [input param]
* a pointer to bt_vendor_op_audio_state_t indicating what audio state is
* set.
* [return]
* 0 - default, don't care.
* [callback]
* None.
*/
BT_VND_OP_SET_AUDIO_STATE,
/* [operation]
* The epilog call to the vendor module so that it can perform any
* vendor-specific processes (e.g. send a HCI_RESET to BT Controller)
* before the caller calls for cleanup().
* [input param]
* None.
* [return]
* 0 - default, don't care.
* [callback]
* Must call epilog_cb to notify the stack of the completion of vendor
* specific epilog process once it has been done.
*/
BT_VND_OP_EPILOG,
/* [operation]
* Call to the vendor module so that it can perform all vendor-specific
* operations to start offloading a2dp media encode & tx.
* [input param]
* pointer to bt_vendor_op_a2dp_offload_start_t containing elements
* required for VND FW to setup a2dp offload.
* [return]
* 0 - default, dont care.
* [callback]
* Must call a2dp_offload_start_cb to notify the stack of the
* completion of vendor specific setup process once it has been done.
*/
BT_VND_OP_A2DP_OFFLOAD_START,
/* [operation]
* Call to the vendor module so that it can perform all vendor-specific
* operations to suspend offloading a2dp media encode & tx.
* [input param]
* pointer to bt_vendor_op_a2dp_offload_t containing elements
* required for VND FW to setup a2dp offload.
* [return]
* 0 - default, dont care.
* [callback]
* Must call a2dp_offload_cb to notify the stack of the
* completion of vendor specific setup process once it has been done.
*/
BT_VND_OP_A2DP_OFFLOAD_STOP,
} bt_vendor_opcode_t;
/** Power on/off control states */
typedef enum {
BT_VND_PWR_OFF,
BT_VND_PWR_ON,
} bt_vendor_power_state_t;
/** Define HCI channel identifier in the file descriptors array
used in BT_VND_OP_USERIAL_OPEN operation.
*/
typedef enum {
CH_CMD, // HCI Command channel
CH_EVT, // HCI Event channel
CH_ACL_OUT, // HCI ACL downstream channel
CH_ACL_IN, // HCI ACL upstream channel
CH_MAX // Total channels
} bt_vendor_hci_channels_t;
/** LPM disable/enable request */
typedef enum {
BT_VND_LPM_DISABLE,
BT_VND_LPM_ENABLE,
} bt_vendor_lpm_mode_t;
/** LPM WAKE set state request */
typedef enum {
BT_VND_LPM_WAKE_ASSERT,
BT_VND_LPM_WAKE_DEASSERT,
} bt_vendor_lpm_wake_state_t;
/** Callback result values */
typedef enum {
BT_VND_OP_RESULT_SUCCESS,
BT_VND_OP_RESULT_FAIL,
} bt_vendor_op_result_t;
/** audio (SCO) state changes triggering VS commands for configuration */
typedef struct {
uint16_t handle;
uint16_t peer_codec;
uint16_t state;
} bt_vendor_op_audio_state_t;
/*
* Bluetooth Host/Controller Vendor callback structure.
*/
/* vendor initialization/configuration callback */
typedef void (*cfg_result_cb)(bt_vendor_op_result_t result);
/* datapath buffer allocation callback (callout)
*
* Vendor lib needs to request a buffer through the alloc callout function
* from HCI lib if the buffer is for constructing a HCI Command packet which
* will be sent through xmit_cb to BT Controller.
*
* For each buffer allocation, the requested size needs to be big enough to
* accommodate the below header plus a complete HCI packet --
* typedef struct
* {
* uint16_t event;
* uint16_t len;
* uint16_t offset;
* uint16_t layer_specific;
* } HC_BT_HDR;
*
* HCI lib returns a pointer to the buffer where Vendor lib should use to
* construct a HCI command packet as below format:
*
* --------------------------------------------
* | HC_BT_HDR | HCI command |
* --------------------------------------------
* where
* HC_BT_HDR.event = 0x2000;
* HC_BT_HDR.len = Length of HCI command;
* HC_BT_HDR.offset = 0;
* HC_BT_HDR.layer_specific = 0;
*
* For example, a HCI_RESET Command will be formed as
* ------------------------
* | HC_BT_HDR |03|0c|00|
* ------------------------
* with
* HC_BT_HDR.event = 0x2000;
* HC_BT_HDR.len = 3;
* HC_BT_HDR.offset = 0;
* HC_BT_HDR.layer_specific = 0;
*/
typedef void* (*malloc_cb)(int size);
/* datapath buffer deallocation callback (callout) */
typedef void (*mdealloc_cb)(void *p_buf);
/* define callback of the cmd_xmit_cb
*
* The callback function which HCI lib will call with the return of command
* complete packet. Vendor lib is responsible for releasing the buffer passed
* in at the p_mem parameter by calling dealloc callout function.
*/
typedef void (*tINT_CMD_CBACK)(void *p_mem);
/* hci command packet transmit callback (callout)
*
* Vendor lib calls xmit_cb callout function in order to send a HCI Command
* packet to BT Controller. The buffer carrying HCI Command packet content
* needs to be first allocated through the alloc callout function.
* HCI lib will release the buffer for Vendor lib once it has delivered the
* packet content to BT Controller.
*
* Vendor lib needs also provide a callback function (p_cback) which HCI lib
* will call with the return of command complete packet.
*
* The opcode parameter gives the HCI OpCode (combination of OGF and OCF) of
* HCI Command packet. For example, opcode = 0x0c03 for the HCI_RESET command
* packet.
*/
typedef uint8_t (*cmd_xmit_cb)(uint16_t opcode, void *p_buf, tINT_CMD_CBACK p_cback);
typedef void (*cfg_a2dp_cb)(bt_vendor_op_result_t result, bt_vendor_opcode_t op, uint8_t bta_av_handle);
typedef struct {
/** set to sizeof(bt_vendor_callbacks_t) */
size_t size;
/*
* Callback and callout functions have implemented in HCI libray
* (libbt-hci.so).
*/
/* notifies caller result of firmware configuration request */
cfg_result_cb fwcfg_cb;
/* notifies caller result of sco configuration request */
cfg_result_cb scocfg_cb;
/* notifies caller result of lpm enable/disable */
cfg_result_cb lpm_cb;
/* notifies the result of codec setting */
cfg_result_cb audio_state_cb;
/* buffer allocation request */
malloc_cb alloc;
/* buffer deallocation request */
mdealloc_cb dealloc;
/* hci command packet transmit request */
cmd_xmit_cb xmit_cb;
/* notifies caller completion of epilog process */
cfg_result_cb epilog_cb;
/* notifies status of a2dp offload cmd's */
cfg_a2dp_cb a2dp_offload_cb;
} bt_vendor_callbacks_t;
/** A2DP offload request */
typedef struct {
uint8_t bta_av_handle; /* BTA_AV Handle for callbacks */
uint16_t xmit_quota; /* Total ACL quota for light stack */
uint16_t acl_data_size; /* Max ACL data size across HCI transport */
uint16_t stream_mtu;
uint16_t local_cid;
uint16_t remote_cid;
uint16_t lm_handle;
uint8_t is_flushable; /* TRUE if flushable channel */
uint32_t stream_source;
uint8_t codec_info[10]; /* Codec capabilities array */
} bt_vendor_op_a2dp_offload_t;
/*
* Bluetooth Host/Controller VENDOR Interface
*/
typedef struct {
/** Set to sizeof(bt_vndor_interface_t) */
size_t size;
/*
* Functions need to be implemented in Vendor libray (libbt-vendor.so).
*/
/**
* Caller will open the interface and pass in the callback routines
* to the implemenation of this interface.
*/
int (*init)(const bt_vendor_callbacks_t* p_cb, unsigned char *local_bdaddr);
/** Vendor specific operations */
int (*op)(bt_vendor_opcode_t opcode, void *param);
/** Closes the interface */
void (*cleanup)(void);
} bt_vendor_interface_t;
/*
* External shared lib functions/data
*/
/* Entry point of DLib --
* Vendor library needs to implement the body of bt_vendor_interface_t
* structure and uses the below name as the variable name. HCI library
* will use this symbol name to get address of the object through the
* dlsym call.
*/
extern const bt_vendor_interface_t BLUETOOTH_VENDOR_LIB_INTERFACE;
#endif /* BT_VENDOR_LIB_H */