113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
/****************************************************************************
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* drivers/wireless/bluetooth/bt_uart_generic.c
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* Generic UART based Bluetooth driver
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include "bt_uart.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: btuart_register
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*
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* Description:
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* Create the UART-based Bluetooth device and register it with the
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* Bluetooth stack.
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*
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* Input Parameters:
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* lower - an instance of the lower half driver interface
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*
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* Returned Value:
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* Zero is returned on success; a negated errno value is returned on any
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* failure.
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*
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****************************************************************************/
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int btuart_register(FAR const struct btuart_lowerhalf_s *lower)
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{
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FAR struct btuart_upperhalf_s *upper;
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int ret;
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wlinfo("lower %p\n", lower);
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if (lower == NULL)
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{
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wlerr("ERROR: btuart lower half is NULL\n");
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return -ENODEV;
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}
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/* Allocate a new instance of the upper half driver state structure */
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upper = (FAR struct btuart_upperhalf_s *)
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kmm_zalloc(sizeof(struct btuart_upperhalf_s));
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if (upper == NULL)
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{
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wlerr("ERROR: Failed to allocate upper-half state\n");
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return -ENOMEM;
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}
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/* Initialize the upper half driver state */
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upper->dev.head_reserve = H4_HEADER_SIZE;
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upper->dev.open = btuart_open;
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upper->dev.send = btuart_send;
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upper->lower = lower;
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/* And register the driver with the network and the Bluetooth stack. */
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ret = bt_netdev_register(&upper->dev);
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if (ret < 0)
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{
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wlerr("ERROR: bt_netdev_registe failed: %d\n", ret);
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kmm_free(upper);
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}
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return ret;
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}
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