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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2015 Intel Corporation. All rights reserved.
*
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include "lib/bluetooth.h"
#include "lib/hci.h"
#include "lib/hci_lib.h"
#include "tools/hciattach.h"
#include "peripheral/attach.h"
static const char *serial_dev = "/dev/ttyS1";
static int serial_fd = -1;
static int open_serial(const char *path)
{
struct termios ti;
int fd, saved_ldisc, ldisc = N_HCI;
fd = open(path, O_RDWR | O_NOCTTY);
if (fd < 0) {
perror("Failed to open serial port");
return -1;
}
if (tcflush(fd, TCIOFLUSH) < 0) {
perror("Failed to flush serial port");
close(fd);
return -1;
}
if (ioctl(fd, TIOCGETD, &saved_ldisc) < 0) {
perror("Failed get serial line discipline");
close(fd);
return -1;
}
/* Switch TTY to raw mode */
memset(&ti, 0, sizeof(ti));
cfmakeraw(&ti);
ti.c_cflag |= (B115200 | CLOCAL | CREAD);
/* Set flow control */
ti.c_cflag |= CRTSCTS;
if (tcsetattr(fd, TCSANOW, &ti) < 0) {
perror("Failed to set serial port settings");
close(fd);
return -1;
}
if (ioctl(fd, TIOCSETD, &ldisc) < 0) {
perror("Failed set serial line discipline");
close(fd);
return -1;
}
printf("Switched line discipline from %d to %d\n", saved_ldisc, ldisc);
return fd;
}
static int attach_proto(const char *path, unsigned int proto,
unsigned int flags)
{
int fd, dev_id;
fd = open_serial(path);
if (fd < 0)
return -1;
if (ioctl(fd, HCIUARTSETFLAGS, flags) < 0) {
perror("Failed to set flags");
close(fd);
return -1;
}
if (ioctl(fd, HCIUARTSETPROTO, proto) < 0) {
perror("Failed to set protocol");
close(fd);
return -1;
}
dev_id = ioctl(fd, HCIUARTGETDEVICE);
if (dev_id < 0) {
perror("Failed to get device id");
close(fd);
return -1;
}
printf("Device index %d attached\n", dev_id);
return fd;
}
void attach_start(void)
{
unsigned long flags;
if (serial_fd >= 0)
return;
printf("Attaching BR/EDR controller to %s\n", serial_dev);
flags = (1 << HCI_UART_RESET_ON_INIT);
serial_fd = attach_proto(serial_dev, HCI_UART_H4, flags);
}
void attach_stop(void)
{
if (serial_fd < 0)
return;
close(serial_fd);
serial_fd = -1;
}
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