145 lines
3.0 KiB
C
145 lines
3.0 KiB
C
/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2015 Intel Corporation. All rights reserved.
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include "lib/bluetooth.h"
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#include "lib/hci.h"
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#include "lib/hci_lib.h"
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#include "tools/hciattach.h"
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#include "peripheral/attach.h"
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static const char *serial_dev = "/dev/ttyS1";
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static int serial_fd = -1;
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static int open_serial(const char *path)
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{
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struct termios ti;
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int fd, saved_ldisc, ldisc = N_HCI;
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fd = open(path, O_RDWR | O_NOCTTY);
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if (fd < 0) {
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perror("Failed to open serial port");
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return -1;
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}
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if (tcflush(fd, TCIOFLUSH) < 0) {
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perror("Failed to flush serial port");
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close(fd);
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return -1;
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}
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if (ioctl(fd, TIOCGETD, &saved_ldisc) < 0) {
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perror("Failed get serial line discipline");
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close(fd);
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return -1;
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}
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/* Switch TTY to raw mode */
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memset(&ti, 0, sizeof(ti));
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cfmakeraw(&ti);
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ti.c_cflag |= (B115200 | CLOCAL | CREAD);
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/* Set flow control */
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ti.c_cflag |= CRTSCTS;
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if (tcsetattr(fd, TCSANOW, &ti) < 0) {
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perror("Failed to set serial port settings");
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close(fd);
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return -1;
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}
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if (ioctl(fd, TIOCSETD, &ldisc) < 0) {
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perror("Failed set serial line discipline");
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close(fd);
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return -1;
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}
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printf("Switched line discipline from %d to %d\n", saved_ldisc, ldisc);
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return fd;
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}
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static int attach_proto(const char *path, unsigned int proto,
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unsigned int flags)
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{
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int fd, dev_id;
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fd = open_serial(path);
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if (fd < 0)
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return -1;
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if (ioctl(fd, HCIUARTSETFLAGS, flags) < 0) {
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perror("Failed to set flags");
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close(fd);
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return -1;
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}
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if (ioctl(fd, HCIUARTSETPROTO, proto) < 0) {
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perror("Failed to set protocol");
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close(fd);
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return -1;
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}
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dev_id = ioctl(fd, HCIUARTGETDEVICE);
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if (dev_id < 0) {
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perror("Failed to get device id");
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close(fd);
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return -1;
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}
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printf("Device index %d attached\n", dev_id);
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return fd;
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}
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void attach_start(void)
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{
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unsigned long flags;
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if (serial_fd >= 0)
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return;
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printf("Attaching BR/EDR controller to %s\n", serial_dev);
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flags = (1 << HCI_UART_RESET_ON_INIT);
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serial_fd = attach_proto(serial_dev, HCI_UART_H4, flags);
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}
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void attach_stop(void)
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{
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if (serial_fd < 0)
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return;
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close(serial_fd);
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serial_fd = -1;
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}
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