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avrdude/src/ser_posix.c

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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2003-2004 Theodore A. Roth <troth@openavr.org>
* Copyright (C) 2006 Joerg Wunsch <j@uriah.heep.sax.de>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/* $Id$ */
/*
* Posix serial interface for avrdude.
*/
#if !defined(WIN32)
#include "ac_cfg.h"
#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netdb.h>
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
#ifdef __APPLE__
# include <IOKit/serial/ioss.h>
#endif
#include "avrdude.h"
#include "libavrdude.h"
long serial_recv_timeout = 5000; /* ms */
struct baud_mapping {
long baud;
speed_t speed;
};
/* There are a lot more baud rates we could handle, but what's the point? */
static struct baud_mapping baud_lookup_table [] = {
{ 300, B300 },
{ 600, B600 },
{ 1200, B1200 },
{ 2400, B2400 },
{ 4800, B4800 },
{ 9600, B9600 },
{ 19200, B19200 },
{ 38400, B38400 },
#ifdef B57600
{ 57600, B57600 },
#endif
#ifdef B115200
{ 115200, B115200 },
#endif
#ifdef B230400
{ 230400, B230400 },
#endif
#ifdef B250000
{ 250000, B250000 },
#endif
#ifdef B460800
{ 460800, B460800 },
#endif
#ifdef B500000
{ 500000, B500000 },
#endif
#ifdef B576000
{ 576000, B576000 },
#endif
#ifdef B921600
{ 921600, B921600 },
#endif
#ifdef B1000000
{ 1000000, B1000000 },
#endif
#ifdef B1152000
{ 1152000, B1152000 },
#endif
#ifdef B1500000
{ 1500000, B1500000 },
#endif
#ifdef B2000000
{ 2000000, B2000000 },
#endif
#ifdef B2500000
{ 2500000, B2500000 },
#endif
#ifdef B3000000
{ 3000000, B3000000 },
#endif
#ifdef B3500000
{ 3500000, B3500000 },
#endif
#ifdef B4000000
{ 4000000, B4000000 },
#endif
{ 0, 0 } /* Terminator. */
};
static struct termios original_termios;
static int saved_original_termios;
static speed_t serial_baud_lookup(long baud, bool *nonstandard) {
struct baud_mapping *map = baud_lookup_table;
*nonstandard = false;
while (map->baud) {
if (map->baud == baud)
return map->speed;
map++;
}
/*
* If a non-standard BAUD rate is used, issue
* a warning (if we are verbose) and return the raw rate
*/
pmsg_notice("serial_baud_lookup(): using non-standard baud rate: %ld\n", baud);
*nonstandard = true;
return baud;
}
static int ser_setparams(const union filedescriptor *fd, long baud, unsigned long cflags) {
int rc;
struct termios termios;
bool nonstandard;
speed_t speed = serial_baud_lookup (baud, &nonstandard);
if (!isatty(fd->ifd))
return -ENOTTY;
/*
* initialize terminal modes
*/
rc = tcgetattr(fd->ifd, &termios);
if (rc < 0) {
int ret = -errno;
pmsg_ext_error("tcgetattr() failed\n");
return ret;
}
/*
* copy termios for ser_close if we haven't already
*/
if (! saved_original_termios++) {
original_termios = termios;
}
if (cflags & SERIAL_CREAD) {
termios.c_cflag |= CREAD;
}
if (cflags & SERIAL_CLOCAL) {
termios.c_cflag |= CLOCAL;
}
termios.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL | ISIG | IEXTEN);
#ifdef ECHOCTL
termios.c_lflag &= ~ECHOCTL;
#endif /* ECHOCTL */
#ifdef ECHOKE
termios.c_lflag &= ~ECHOKE;
#endif /* ECHOKE */
termios.c_oflag &= ~(OPOST | ONLCR | OCRNL);
termios.c_iflag &= ~(INLCR | IGNCR | ICRNL | IGNBRK);
#ifdef IUCLC
termios.c_iflag &= ~IUCLC;
#endif /* IUCLC */
#ifdef PARMRK
termios.c_iflag &= ~PARMRK;
#endif /* PARMRK */
// MacOS doesn't handle nonstandard baudrate values in
// normal tcsetattr(), sigh.
#ifdef __APPLE__
if (!nonstandard) {
#endif
cfsetospeed(&termios, speed);
cfsetispeed(&termios, speed);
#ifdef __APPLE__
}
#endif
termios.c_cflag &= ~CSIZE;
if (cflags & SERIAL_CS8) {
termios.c_cflag |= CS8;
}
if (cflags & SERIAL_CS7) {
termios.c_cflag |= CS7;
}
if (cflags & SERIAL_CS6) {
termios.c_cflag |= CS6;
}
if (cflags & SERIAL_CS5) {
termios.c_cflag |= CS5;
}
if (cflags & SERIAL_CSTOPB) {
termios.c_cflag |= CSTOPB;
} else {
termios.c_cflag &= ~CSTOPB;
}
termios.c_iflag &= ~(INPCK | ISTRIP);
if (cflags & (SERIAL_PARENB | SERIAL_PARODD)) {
termios.c_cflag |= PARENB;
} else {
termios.c_cflag &= ~PARENB;
}
if (cflags & SERIAL_PARODD) {
termios.c_cflag |= PARODD;
} else {
termios.c_cflag &= ~PARODD;
}
#ifdef IXANY
termios.c_iflag &= ~IXANY;
#endif /* IXANY */
termios.c_iflag &= ~(IXON | IXOFF);
#ifdef CRTSCTS
termios.c_iflag &= ~CRTSCTS;
#endif /* CRTSCTS */
#ifdef CNEW_RTSCTS
termios.c_iflag &= ~CNEW_RTSCTS;
#endif /* CRTSCTS */
rc = tcsetattr(fd->ifd, TCSANOW, &termios);
if (rc < 0) {
int ret = -errno;
pmsg_ext_error("tcsetattr() failed\n");
return ret;
}
#ifdef __APPLE__
// handle nonstandard speed values the MacOS way
if (nonstandard) {
if (ioctl(fd->ifd, IOSSIOSPEED, &speed) < 0) {
int ret = -errno;
pmsg_ext_error("ioctrl(IOSSIOSPEED) failed\n");
return ret;
}
}
#endif // __APPLE__
tcflush(fd->ifd, TCIFLUSH);
return 0;
}
/*
* Given a port description of the form <host>:<port>, open a TCP
* connection to the specified destination, which is assumed to be a
* terminal/console server with serial parameters configured
* appropriately (e. g. 115200-8-N-1 for a STK500.)
*/
static int net_open(const char *port, union filedescriptor *fdp) {
char *hp, *hstr, *pstr;
int s, fd, ret = -1;
struct addrinfo hints;
struct addrinfo *result, *rp;
if ((hstr = hp = strdup(port)) == NULL) {
pmsg_error("out of memory\n");
return -1;
}
/*
* As numeric IPv6 addresses use colons as separators, we need to
* look for the last colon here, which separates the port number or
* service name from the host or IP address.
*/
if (((pstr = strrchr(hstr, ':')) == NULL) || (pstr == hstr)) {
pmsg_error("mangled host:port string %s\n", hstr);
goto error;
}
/*
* Remove brackets from the host part, if present.
*/
if (*hstr == '[' && *(pstr-1) == ']') {
hstr++;
*(pstr-1) = '\0';
}
/*
* Terminate the host section of the description.
*/
*pstr++ = '\0';
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
s = getaddrinfo(hstr, pstr, &hints, &result);
if (s != 0) {
pmsg_ext_error("cannot resolve host=\"%s\", port=\"%s\": %s\n",
hstr, pstr, gai_strerror(s));
goto error;
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if (fd == -1) {
/* This one failed, loop over */
continue;
}
if (connect(fd, rp->ai_addr, rp->ai_addrlen) != -1) {
/* Success, we are connected */
break;
}
close(fd);
}
if (rp == NULL) {
pmsg_ext_error("cannot connect: %s\n", strerror(errno));
}
else {
fdp->ifd = fd;
ret = 0;
}
freeaddrinfo(result);
error:
free(hp);
return ret;
}
static int ser_set_dtr_rts(const union filedescriptor *fdp, int is_on) {
unsigned int ctl;
int r;
r = ioctl(fdp->ifd, TIOCMGET, &ctl);
if (r < 0) {
pmsg_ext_error("ioctl(\"TIOCMGET\"): %s\n", strerror(errno));
return -1;
}
if (is_on) {
/* Set DTR and RTS */
ctl |= (TIOCM_DTR | TIOCM_RTS);
}
else {
/* Clear DTR and RTS */
ctl &= ~(TIOCM_DTR | TIOCM_RTS);
}
r = ioctl(fdp->ifd, TIOCMSET, &ctl);
if (r < 0) {
pmsg_ext_error("ioctl(\"TIOCMSET\"): %s\n", strerror(errno));
return -1;
}
return 0;
}
static int ser_open(const char *port, union pinfo pinfo, union filedescriptor *fdp) {
int rc;
int fd;
/*
* If the port is of the form "net:<host>:<port>", then
* handle it as a TCP connection to a terminal server.
*/
if (strncmp(port, "net:", strlen("net:")) == 0) {
return net_open(port + strlen("net:"), fdp);
}
/*
* open the serial port
*/
fd = open(port, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (fd < 0) {
pmsg_ext_error("cannot open port %s: %s\n", port, strerror(errno));
return -1;
}
fdp->ifd = fd;
/*
* set serial line attributes
*/
rc = ser_setparams(fdp, pinfo.serialinfo.baud, pinfo.serialinfo.cflags);
if (rc) {
pmsg_ext_error("cannot set attributes for port %s: %s\n", port, strerror(-rc));
close(fd);
return -1;
}
return 0;
}
static void ser_close(union filedescriptor *fd) {
/*
* restore original termios settings from ser_open
*/
if (saved_original_termios) {
int rc = tcsetattr(fd->ifd, TCSANOW | TCSADRAIN, &original_termios);
if (rc) {
pmsg_ext_error("cannot reset attributes for device: %s\n", strerror(errno));
}
saved_original_termios = 0;
}
close(fd->ifd);
}
static int ser_send(const union filedescriptor *fd, const unsigned char * buf, size_t buflen) {
int rc;
const unsigned char * p = buf;
size_t len = buflen;
if (!len)
return 0;
if (verbose > 3)
{
pmsg_trace("send: ");
while (buflen) {
unsigned char c = *buf;
if (isprint(c)) {
msg_trace("%c ", c);
}
else {
msg_trace(". ");
}
msg_trace("[%02x] ", c);
buf++;
buflen--;
}
msg_trace("\n");
}
while (len) {
rc = write(fd->ifd, p, (len > 1024) ? 1024 : len);
if (rc < 0) {
pmsg_ext_error("unable to write: %s\n", strerror(errno));
return -1;
}
p += rc;
len -= rc;
}
return 0;
}
static int ser_recv(const union filedescriptor *fd, unsigned char * buf, size_t buflen) {
struct timeval timeout, to2;
fd_set rfds;
int nfds;
int rc;
unsigned char * p = buf;
size_t len = 0;
timeout.tv_sec = serial_recv_timeout / 1000L;
timeout.tv_usec = (serial_recv_timeout % 1000L) * 1000;
to2 = timeout;
while (len < buflen) {
reselect:
FD_ZERO(&rfds);
FD_SET(fd->ifd, &rfds);
nfds = select(fd->ifd + 1, &rfds, NULL, NULL, &to2);
if (nfds == 0) {
pmsg_notice2("ser_recv(): programmer is not responding\n");
return -1;
}
else if (nfds == -1) {
if (errno == EINTR || errno == EAGAIN) {
pmsg_warning("programmer is not responding, reselecting\n");
goto reselect;
}
else {
pmsg_ext_error("select(): %s\n", strerror(errno));
return -1;
}
}
rc = read(fd->ifd, p, (buflen - len > 1024) ? 1024 : buflen - len);
if (rc < 0) {
pmsg_ext_error("unable to read: %s\n", strerror(errno));
return -1;
}
p += rc;
len += rc;
}
p = buf;
if (verbose > 3)
{
pmsg_trace("recv: ");
while (len) {
unsigned char c = *p;
if (isprint(c)) {
msg_trace("%c ", c);
}
else {
msg_trace(". ");
}
msg_trace("[%02x] ", c);
p++;
len--;
}
msg_trace("\n");
}
return 0;
}
static int ser_drain(const union filedescriptor *fd, int display) {
struct timeval timeout;
fd_set rfds;
int nfds;
int rc;
unsigned char buf;
timeout.tv_sec = 0;
timeout.tv_usec = 250000;
if (display) {
msg_info("drain>");
}
while (1) {
FD_ZERO(&rfds);
FD_SET(fd->ifd, &rfds);
reselect:
nfds = select(fd->ifd + 1, &rfds, NULL, NULL, &timeout);
if (nfds == 0) {
if (display) {
msg_info("<drain\n");
}
break;
}
else if (nfds == -1) {
if (errno == EINTR) {
goto reselect;
}
else {
pmsg_ext_error("select(): %s\n", strerror(errno));
return -1;
}
}
rc = read(fd->ifd, &buf, 1);
if (rc < 0) {
pmsg_ext_error("unable to read: %s\n", strerror(errno));
return -1;
}
if (display) {
msg_info("%02x ", buf);
}
}
return 0;
}
struct serial_device serial_serdev =
{
.open = ser_open,
.setparams = ser_setparams,
.close = ser_close,
.send = ser_send,
.recv = ser_recv,
.drain = ser_drain,
.set_dtr_rts = ser_set_dtr_rts,
.flags = SERDEV_FL_CANSETSPEED,
};
struct serial_device *serdev = &serial_serdev;
#endif /* WIN32 */
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