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//
// Copyright (c) 1994, 1995 by Mike Romberg ( romberg@fsl.noaa.gov )
//
// This file may be distributed under terms of the GPL
//
//
// $Id: serialmeter.cc,v 1.9 1998/10/04 18:16:38 mromberg Exp $
//
//
// In order to use this new serial meter, xosview needs to be suid root.
//
#include "serialmeter.h"
#include "xosview.h"
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <stdlib.h>
#include <strstream.h>
// This should go away after types.h gets fixed in the kernel.
#ifdef __alpha__
typedef unsigned char u8;
typedef signed short s16;
typedef unsigned short u16;
typedef signed int s32;
typedef unsigned int u32;
typedef signed long long s64;
typedef unsigned long long u64;
#endif
#include <unistd.h>
#if defined(GNULIBC) || defined(__GLIBC__)
#include <sys/io.h>
#ifndef __alpha__
#include <sys/perm.h>
#endif
#else
#ifndef __alpha__
#include <asm/io.h>
#endif
#endif
#include <linux/serial.h>
#include <linux/serial_reg.h>
SerialMeter::SerialMeter( XOSView *parent, Device device )
: BitMeter( parent, getTitle(device), "LSR bits(0-7), MSR bits(0-7)", 16){
_device = device;
_port = 0;
}
SerialMeter::~SerialMeter( void ){
}
void SerialMeter::checkevent( void ){
getserial();
BitMeter::checkevent();
}
void SerialMeter::checkResources( void ){
BitMeter::checkResources();
onColor_ = parent_->allocColor( parent_->getResource( "serialOnColor" ) );
offColor_ = parent_->allocColor( parent_->getResource( "serialOffColor" ) );
priority_ = atoi (parent_->getResource( "serialPriority" ) );
_port = getPortBase(_device);
if (!getport(_port + UART_LSR) || !getport(_port + UART_MSR)){
cerr << "SerialMeter::SerialMeter() : "
<< "xosview must be suid root to use the serial meter." <<endl;
parent_->done(1);
}
}
bool SerialMeter::getport(unsigned short int port){
return ioperm(port, 1, 1) != -1;
}
void SerialMeter::getserial( void ){
// get the LSR and MSR
unsigned char lsr = inb(_port + UART_LSR);
unsigned char msr = inb(_port + UART_MSR);
setBits(0, lsr);
setBits(8, msr);
}
const char *SerialMeter::getTitle(Device dev) const {
static const char *names[] = { "ttyS0", "ttyS1", "ttyS2", "ttyS3",
"ttyS4", "ttyS5", "ttyS6", "ttyS7",
"ttyS8", "ttyS9" };
return names[dev];
}
const char *SerialMeter::getResourceName(Device dev){
static const char *names[] = { "serial0", "serial1",
"serial2", "serial3",
"serial4", "serial5",
"serial6", "serial7",
"serial8", "serial9" };
return names[dev];
}
unsigned short int SerialMeter::getPortBase(Device dev) const {
static char *deviceFile[] = { "/dev/ttyS0",
"/dev/ttyS1",
"/dev/ttyS2",
"/dev/ttyS3",
"/dev/ttyS4",
"/dev/ttyS5",
"/dev/ttyS6",
"/dev/ttyS7",
"/dev/ttyS8",
"/dev/ttyS9"};
const char* res = parent_->getResource(getResourceName(dev));
if (!strncasecmp(res, "True", 5)){ // Autodetect portbase.
int fd;
struct serial_struct serinfo;
// get the real serial port (code stolen from setserial 2.11)
if ((fd = open(deviceFile[dev], O_RDONLY|O_NONBLOCK)) < 0) {
cerr << "SerialMeter::SerialMeter() : "
<< "failed to open " << deviceFile[dev] <<"." <<endl;
exit(1);
}
if (ioctl(fd, TIOCGSERIAL, &serinfo) < 0) {
cerr << "Failed to detect port base for " << deviceFile[dev] << endl;
close(fd);
exit(1);
}
close(fd);
return serinfo.port;
}
else { // Use user specified port base.
istrstream istrm(res);
unsigned short int tmp = 0;
istrm >> hex >> tmp;
return tmp;
}
return 0;
}
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