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avrdude/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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id$ */
/*
* Posix serial interface for avrdude.
*/
#if !defined(WIN32NATIVE)
#include <ctype.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 <netinet/in.h>
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
#include "avrdude.h"
#include "serial.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 [] = {
{ 1200, B1200 },
{ 2400, B2400 },
{ 4800, B4800 },
{ 9600, B9600 },
{ 19200, B19200 },
{ 38400, B38400 },
{ 57600, B57600 },
{ 115200, B115200 },
{ 230400, B230400 },
{ 0, 0 } /* Terminator. */
};
static struct termios original_termios;
static int saved_original_termios;
static speed_t serial_baud_lookup(long baud)
{
struct baud_mapping *map = baud_lookup_table;
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
*/
if (verbose > 0)
fprintf(stderr, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
progname, baud);
return baud;
}
static int ser_setspeed(union filedescriptor *fd, long baud)
{
int rc;
struct termios termios;
speed_t speed = serial_baud_lookup (baud);
if (!isatty(fd->ifd))
return -ENOTTY;
/*
* initialize terminal modes
*/
rc = tcgetattr(fd->ifd, &termios);
if (rc < 0) {
fprintf(stderr, "%s: ser_setspeed(): tcgetattr() failed",
progname);
return -errno;
}
/*
* copy termios for ser_close if we haven't already
*/
if (! saved_original_termios++) {
original_termios = termios;
}
termios.c_iflag = IGNBRK;
termios.c_oflag = 0;
termios.c_lflag = 0;
termios.c_cflag = (CS8 | CREAD | CLOCAL);
termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 0;
cfsetospeed(&termios, speed);
cfsetispeed(&termios, speed);
rc = tcsetattr(fd->ifd, TCSANOW, &termios);
if (rc < 0) {
fprintf(stderr, "%s: ser_setspeed(): tcsetattr() failed\n",
progname);
return -errno;
}
/*
* Everything is now set up for a local line without modem control
* or flow control, so clear O_NONBLOCK again.
*/
rc = fcntl(fd->ifd, F_GETFL, 0);
if (rc != -1)
fcntl(fd->ifd, F_SETFL, rc & ~O_NONBLOCK);
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 void
net_open(const char *port, union filedescriptor *fdp)
{
char *hstr, *pstr, *end;
unsigned int pnum;
int fd;
struct sockaddr_in sockaddr;
struct hostent *hp;
if ((hstr = strdup(port)) == NULL) {
fprintf(stderr, "%s: net_open(): Out of memory!\n",
progname);
exit(1);
}
if (((pstr = strchr(hstr, ':')) == NULL) || (pstr == hstr)) {
fprintf(stderr, "%s: net_open(): Mangled host:port string \"%s\"\n",
progname, hstr);
free(hstr);
exit(1);
}
/*
* Terminate the host section of the description.
*/
*pstr++ = '\0';
pnum = strtoul(pstr, &end, 10);
if ((*pstr == '\0') || (*end != '\0') || (pnum == 0) || (pnum > 65535)) {
fprintf(stderr, "%s: net_open(): Bad port number \"%s\"\n",
progname, pstr);
free(hstr);
exit(1);
}
if ((hp = gethostbyname(hstr)) == NULL) {
fprintf(stderr, "%s: net_open(): unknown host \"%s\"\n",
progname, hstr);
free(hstr);
exit(1);
}
free(hstr);
if ((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
fprintf(stderr, "%s: net_open(): Cannot open socket: %s\n",
progname, strerror(errno));
exit(1);
}
memset(&sockaddr, 0, sizeof(struct sockaddr_in));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(pnum);
memcpy(&(sockaddr.sin_addr.s_addr), hp->h_addr, sizeof(struct in_addr));
if (connect(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
fprintf(stderr, "%s: net_open(): Connect failed: %s\n",
progname, strerror(errno));
exit(1);
}
fdp->ifd = fd;
}
static int ser_set_dtr_rts(union filedescriptor *fdp, int is_on)
{
unsigned int ctl;
int r;
r = ioctl(fdp->ifd, TIOCMGET, &ctl);
if (r < 0) {
perror("ioctl(\"TIOCMGET\")");
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) {
perror("ioctl(\"TIOCMSET\")");
return -1;
}
return 0;
}
static int ser_open(char * port, long baud, 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) {
net_open(port + strlen("net:"), fdp);
return 0;
}
/*
* open the serial port
*/
fd = open(port, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (fd < 0) {
fprintf(stderr, "%s: ser_open(): can't open device \"%s\": %s\n",
progname, port, strerror(errno));
return -1;
}
fdp->ifd = fd;
/*
* set serial line attributes
*/
rc = ser_setspeed(fdp, baud);
if (rc) {
fprintf(stderr,
"%s: ser_open(): can't set attributes for device \"%s\": %s\n",
progname, 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) {
fprintf(stderr,
"%s: ser_close(): can't reset attributes for device: %s\n",
progname, strerror(errno));
}
saved_original_termios = 0;
}
close(fd->ifd);
}
static int ser_send(union filedescriptor *fd, unsigned char * buf, size_t buflen)
{
struct timeval timeout, to2;
int rc;
unsigned char * p = buf;
size_t len = buflen;
if (!len)
return 0;
if (verbose > 3)
{
fprintf(stderr, "%s: Send: ", progname);
while (buflen) {
unsigned char c = *buf;
if (isprint(c)) {
fprintf(stderr, "%c ", c);
}
else {
fprintf(stderr, ". ");
}
fprintf(stderr, "[%02x] ", c);
buf++;
buflen--;
}
fprintf(stderr, "\n");
}
timeout.tv_sec = 0;
timeout.tv_usec = 500000;
to2 = timeout;
while (len) {
rc = write(fd->ifd, p, (len > 1024) ? 1024 : len);
if (rc < 0) {
fprintf(stderr, "%s: ser_send(): write error: %s\n",
progname, strerror(errno));
exit(1);
}
p += rc;
len -= rc;
}
return 0;
}
static int ser_recv(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) {
if (verbose > 1)
fprintf(stderr,
"%s: ser_recv(): programmer is not responding\n",
progname);
return -1;
}
else if (nfds == -1) {
if (errno == EINTR || errno == EAGAIN) {
fprintf(stderr,
"%s: ser_recv(): programmer is not responding,reselecting\n",
progname);
goto reselect;
}
else {
fprintf(stderr, "%s: ser_recv(): select(): %s\n",
progname, strerror(errno));
exit(1);
}
}
rc = read(fd->ifd, p, (buflen - len > 1024) ? 1024 : buflen - len);
if (rc < 0) {
fprintf(stderr, "%s: ser_recv(): read error: %s\n",
progname, strerror(errno));
exit(1);
}
p += rc;
len += rc;
}
p = buf;
if (verbose > 3)
{
fprintf(stderr, "%s: Recv: ", progname);
while (len) {
unsigned char c = *p;
if (isprint(c)) {
fprintf(stderr, "%c ", c);
}
else {
fprintf(stderr, ". ");
}
fprintf(stderr, "[%02x] ", c);
p++;
len--;
}
fprintf(stderr, "\n");
}
return 0;
}
static int ser_drain(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) {
fprintf(stderr, "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) {
fprintf(stderr, "<drain\n");
}
break;
}
else if (nfds == -1) {
if (errno == EINTR) {
goto reselect;
}
else {
fprintf(stderr, "%s: ser_drain(): select(): %s\n",
progname, strerror(errno));
exit(1);
}
}
rc = read(fd->ifd, &buf, 1);
if (rc < 0) {
fprintf(stderr, "%s: ser_drain(): read error: %s\n",
progname, strerror(errno));
exit(1);
}
if (display) {
fprintf(stderr, "%02x ", buf);
}
}
return 0;
}
struct serial_device serial_serdev =
{
.open = ser_open,
.setspeed = ser_setspeed,
.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 /* WIN32NATIVE */
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