diff options
Diffstat (limited to 'src/shared/libosmocore/src/serial.c')
| -rw-r--r-- | src/shared/libosmocore/src/serial.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/src/shared/libosmocore/src/serial.c b/src/shared/libosmocore/src/serial.c deleted file mode 100644 index a025ae91..00000000 --- a/src/shared/libosmocore/src/serial.c +++ /dev/null @@ -1,229 +0,0 @@ -/* - * serial.c - * - * Utility functions to deal with serial ports - * - * Copyright (C) 2011 Sylvain Munaut <tnt@246tNt.com> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -/*! \addtogroup serial - * @{ - */ - -/*! \file serial.c - * \file Osmocom serial port helpers - */ - -#include <errno.h> -#include <fcntl.h> -#include <stdio.h> -#include <termios.h> -#include <unistd.h> -#include <sys/ioctl.h> -#include <sys/types.h> -#include <sys/stat.h> -#ifdef __linux__ -#include <linux/serial.h> -#endif - -#include <osmocom/core/serial.h> - - -#if 0 -# define dbg_perror(x) perror(x) -#else -# define dbg_perror(x) do { } while (0) -#endif - -/*! \brief Open serial device and does base init - * \param[in] dev Path to the device node to open - * \param[in] baudrate Baudrate constant (speed_t: B9600, B...) - * \returns >=0 file descriptor in case of success or negative errno. - */ -int -osmo_serial_init(const char *dev, speed_t baudrate) -{ - int rc, fd=0, v24; - struct termios tio; - - /* Open device */ - fd = open(dev, O_RDWR | O_NOCTTY); - if (fd < 0) { - dbg_perror("open"); - return -errno; - } - - /* Configure serial interface */ - rc = tcgetattr(fd, &tio); - if (rc < 0) { - dbg_perror("tcgetattr()"); - rc = -errno; - goto error; - } - - cfsetispeed(&tio, baudrate); - cfsetospeed(&tio, baudrate); - - tio.c_cflag &= ~(PARENB | CSTOPB | CSIZE | CRTSCTS); - tio.c_cflag |= (CREAD | CLOCAL | CS8); - tio.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); - tio.c_iflag |= (INPCK | ISTRIP); - tio.c_iflag &= ~(ISTRIP | IXON | IXOFF | IGNBRK | INLCR | ICRNL | IGNCR); - tio.c_oflag &= ~(OPOST | ONLCR); - - rc = tcsetattr(fd, TCSANOW, &tio); - if (rc < 0) { - dbg_perror("tcsetattr()"); - rc = -errno; - goto error; - } - - /* Set ready to read/write */ - v24 = TIOCM_DTR | TIOCM_RTS; - rc = ioctl(fd, TIOCMBIS, &v24); - if (rc < 0) { - dbg_perror("ioctl(TIOCMBIS)"); - rc = -errno; - goto error; - } - - return fd; - -error: - if (fd) - close(fd); - return rc; -} - -static int -_osmo_serial_set_baudrate(int fd, speed_t baudrate) -{ - int rc; - struct termios tio; - - rc = tcgetattr(fd, &tio); - if (rc < 0) { - dbg_perror("tcgetattr()"); - return -errno; - } - cfsetispeed(&tio, baudrate); - cfsetospeed(&tio, baudrate); - - rc = tcsetattr(fd, TCSANOW, &tio); - if (rc < 0) { - dbg_perror("tcgetattr()"); - return -errno; - } - - return 0; -} - -/*! \brief Change current baudrate - * \param[in] fd File descriptor of the open device - * \param[in] baudrate Baudrate constant (speed_t: B9600, B...) - * \returns 0 for success or negative errno. - */ -int -osmo_serial_set_baudrate(int fd, speed_t baudrate) -{ - osmo_serial_clear_custom_baudrate(fd); - return _osmo_serial_set_baudrate(fd, baudrate); -} - -/*! \brief Change current baudrate to a custom one using OS specific method - * \param[in] fd File descriptor of the open device - * \param[in] baudrate Baudrate as integer - * \returns 0 for success or negative errno. - * - * This function might not work on all OS or with all type of serial adapters - */ -int -osmo_serial_set_custom_baudrate(int fd, int baudrate) -{ -#ifdef __linux__ - int rc; - struct serial_struct ser_info; - - rc = ioctl(fd, TIOCGSERIAL, &ser_info); - if (rc < 0) { - dbg_perror("ioctl(TIOCGSERIAL)"); - return -errno; - } - - ser_info.flags = ASYNC_SPD_CUST | ASYNC_LOW_LATENCY; - ser_info.custom_divisor = ser_info.baud_base / baudrate; - - rc = ioctl(fd, TIOCSSERIAL, &ser_info); - if (rc < 0) { - dbg_perror("ioctl(TIOCSSERIAL)"); - return -errno; - } - - return _osmo_serial_set_baudrate(fd, B38400); /* 38400 is a kind of magic ... */ -#elif defined(__APPLE__) -#ifndef IOSSIOSPEED -#define IOSSIOSPEED _IOW('T', 2, speed_t) -#endif - int rc; - - unsigned int speed = baudrate; - rc = ioctl(fd, IOSSIOSPEED, &speed); - if (rc < 0) { - dbg_perror("ioctl(IOSSIOSPEED)"); - return -errno; - } - return 0; -#else -#warning osmo_serial_set_custom_baudrate: unsupported platform - return 0; -#endif -} - -/*! \brief Clear any custom baudrate - * \param[in] fd File descriptor of the open device - * \returns 0 for success or negative errno. - * - * This function might not work on all OS or with all type of serial adapters - */ -int -osmo_serial_clear_custom_baudrate(int fd) -{ -#ifdef __linux__ - int rc; - struct serial_struct ser_info; - - rc = ioctl(fd, TIOCGSERIAL, &ser_info); - if (rc < 0) { - dbg_perror("ioctl(TIOCGSERIAL)"); - return -errno; - } - - ser_info.flags = ASYNC_LOW_LATENCY; - ser_info.custom_divisor = 0; - - rc = ioctl(fd, TIOCSSERIAL, &ser_info); - if (rc < 0) { - dbg_perror("ioctl(TIOCSSERIAL)"); - return -errno; - } -#endif - return 0; -} - -/*! @} */ |