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d2634ef6d4
Further more common DM-related to the DM, in order to hide more of the inner workings of the diag_client struct. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/*
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* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
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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 are
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* met:
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/ioctl.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include "diag.h"
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#include "dm.h"
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#include "hdlc.h"
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#include "watch.h"
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#define APPS_BUF_SIZE 16384
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static unsigned int check_baudrate(unsigned int baudrate)
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{
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switch (baudrate)
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{
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case 9600:
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return B9600;
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case 19200:
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return B19200;
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case 38400:
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return B38400;
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case 115200:
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return B115200;
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default:
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warn("Illegal baud rate %u!", baudrate);
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return 0;
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}
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}
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int diag_uart_open(const char *uartname, unsigned int baudrate)
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{
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int ret;
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int fd;
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struct termios options, options_save;
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baudrate = check_baudrate(baudrate);
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if (baudrate == 0)
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return -EINVAL;
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fd = open(uartname, O_RDWR | O_NOCTTY | O_NONBLOCK);
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if (fd < 0)
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return -errno;
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ret = tcflush(fd, TCIOFLUSH);
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if (ret < 0)
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return -errno;
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ret = fcntl(fd, F_SETFL, 0);
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if (ret < 0)
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return -errno;
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ret = ioctl(fd, TCGETS, &options_save);
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if (ret < 0)
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return -errno;
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options = options_save;
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options.c_cc[VTIME] = 0; /* inter-character timer unused */
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options.c_cc[VMIN] = 4; /* blocking read until 4 chars received */
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options.c_cflag &= ~PARENB;
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options.c_cflag &= ~CSTOPB;
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options.c_cflag &= ~CSIZE;
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options.c_cflag |= (CS8 | CLOCAL | CREAD);
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options.c_iflag = 0;
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options.c_oflag = 0;
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options.c_lflag = 0;
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options.c_cflag = (options.c_cflag & ~CBAUD) | (baudrate & CBAUD);
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ret = ioctl(fd, TCSETS, &options); // TODO: need to call ioctl(ret, TCSETS, &options_save) to revert to original state
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if (ret < 0)
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return -errno;
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printf("Connected to %s@%d\n", uartname, baudrate);
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dm_add("UART client", fd, fd);
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return fd;
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}
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