101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/****************************************************************************
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* drivers/wireless/bluetooth/bt_uart_generic.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* Generic UART based Bluetooth driver */
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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->dev.close = btuart_close;
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upper->dev.ioctl = btuart_ioctl;
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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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