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https://github.com/Telecominfraproject/OpenCellular.git
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2a8f78bdee
Macro _GNU_SOURCE is not automatically defined in chroot host toolchain. Add this macro to let stdlib.h header file declare ptsname_r() function. BUG=None TEST=Run "gcc -V" to check if the toolchain version >= 4.6.0. And run "make clean; make" in Chromium OS dev chroot. Change-Id: I02d8a6f9ac9a6e51da3f2cd2ecbec9ec1f096c6a Signed-off-by: Rong Chang <rongchang@chromium.org>
131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* ec_uartd.c - UART daemon for BD-ICDI-B board for EC debugging
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*
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* based on chromeos_public/src/third_party/hdctools/src/ftdiuart.c
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*
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* compile with:
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* gcc -o ftdi_uartd ftdi_uartd.c -lftdi
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*/
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/* Force header files to define grantpt(), posix_openpt(), cfmakeraw() */
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#define _BSD_SOURCE
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#define _XOPEN_SOURCE 600
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/* Force header file to declare ptsname_r(), etc. */
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <fcntl.h>
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#include <ftdi.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <termios.h>
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#include <unistd.h>
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int main(int argc, char **argv)
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{
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struct ftdi_context fcontext;
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struct termios tty_cfg;
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char ptname[PATH_MAX];
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char buf[1024];
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int fd;
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int rv;
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/* Init */
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if (ftdi_init(&fcontext) < 0) {
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fprintf(stderr, "ftdi_init failed\n");
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return 1;
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}
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/* Open interface B (UART) in the FTDI device and set 115kbaud */
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ftdi_set_interface(&fcontext, INTERFACE_B);
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rv = ftdi_usb_open(&fcontext, 0x0403, 0xbcda);
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if (rv < 0) {
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fprintf(stderr, "error opening ftdi device: %d (%s)\n",
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rv, ftdi_get_error_string(&fcontext));
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return 2;
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}
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rv = ftdi_set_baudrate(&fcontext, 115200);
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if (rv < 0) {
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fprintf(stderr, "error setting baudrate: %d (%s)\n",
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rv, ftdi_get_error_string(&fcontext));
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return 2;
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}
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/* Set DTR; this muxes RX on the ICDI board */
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ftdi_setdtr(&fcontext, 1);
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/* Open the pty */
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fd = posix_openpt(O_RDWR | O_NOCTTY);
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if (fd == -1) {
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perror("opening pty master");
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return 3;
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}
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if (grantpt(fd) == -1) {
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perror("grantpt");
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return 3;
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}
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if (unlockpt(fd) == -1) {
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perror("unlockpt");
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return 3;
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}
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if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
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perror("fcntl setfl -> nonblock");
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return 3;
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}
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if (ptsname_r(fd, ptname, PATH_MAX) != 0) {
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perror("getting name of pty");
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return 3;
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}
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fprintf(stderr, "pty name = %s\n", ptname);
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if (!isatty(fd)) {
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perror("not a TTY device\n");
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return 3;
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}
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cfmakeraw(&tty_cfg);
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tcsetattr(fd, TCSANOW, &tty_cfg);
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if (chmod(ptname, 0666) == -1) {
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perror("setting pty attributes");
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return 3;
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}
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/* Read and write data forever */
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while (1) {
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int bytes = read(fd, buf, sizeof(buf));
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if (bytes > 0) {
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rv = ftdi_write_data(&fcontext, buf, bytes);
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if (rv != bytes) {
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perror("writing to uart");
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break;
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}
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}
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usleep(1000);
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bytes = ftdi_read_data(&fcontext, buf, sizeof(buf));
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if (bytes > 0) {
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int bytes_remaining = bytes;
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while ((bytes = write(fd, buf, bytes_remaining)) > 0)
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bytes_remaining -= bytes;
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if (bytes == -1)
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perror("writing ftdi data to pty");
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} else if (bytes < 0) {
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perror("failed ftdi_read_data");
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break;
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}
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}
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/* Cleanup */
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close(fd);
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ftdi_usb_close(&fcontext);
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ftdi_deinit(&fcontext);
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return 0;
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}
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