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/*
* $Id: dmascc_cfg.c,v 0.7 1997/12/02 11:31:21 oe1kib Exp $
*
* Configuration utility for dmascc driver
* Copyright (C) 1997 Klaus Kudielka
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/dmascc.h>
#include <asm/param.h>
void usage(char *name)
{
fprintf(stderr,
"usage: %s <interface> [ options ... ]\n\n"
"options: --show show configuration\n"
" --speed <f> set baud rate\n"
" --nrzi 0 | 1 set NRZ or NRZI encoding\n"
" --clocks <i> set clock mode\n"
" --txdelay <f> set transmit delay in ms\n"
" --txtime <f> set maximum transmit time in s\n"
" --sqdelay <f> set squelch delay in ms\n"
" --slottime <f> set slot time in ms\n"
" --waittime <f> set wait time after transmit in ms\n"
" --persist <i> set persistence parameter\n"
" --dma <i> set DMA channel\n", name);
}
int main(int argc, char *argv[])
{
int sk, show = 0, set = 0, error = 0;
struct ifreq ifr;
struct scc_param param;
char **option, *end;
if (argc < 2) {
usage(argv[0]);
return 1;
}
if ((sk = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("socket");
return 2;
}
strncpy(ifr.ifr_name, argv[1], IFNAMSIZ);
ifr.ifr_data = (caddr_t) ¶m;
if (ioctl(sk, SIOCGSCCPARAM, &ifr) < 0) {
perror("ioctl");
close(sk);
return 3;
}
option = argv + 2;
while (!error && *option != NULL) {
if (!strcmp(*option, "--show")) {
show = 1;
option++;
} else if (!strcmp(*option, "--speed")) {
option++;
if (*option != NULL) {
double speed;
set = 1;
speed = strtod(*option++, &end);
if (*end) error = 1; else {
if (speed <= 0.0) param.brg_tc = -1;
else param.brg_tc = param.pclk_hz / (speed * 2) - 2;
if (param.brg_tc > 0xffff) param.brg_tc = -1;
}
} else error = 1;
} else if (!strcmp(*option, "--nrzi")) {
option++;
if (*option != NULL) {
set = 1;
param.nrzi = strtol(*option++, &end, 0);
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--clocks")) {
option++;
if (*option != NULL) {
set = 1;
param.clocks = strtol(*option++, &end, 0);
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--txdelay")) {
option++;
if (*option != NULL) {
set = 1;
param.txdelay = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--txtime")) {
option++;
if (*option != NULL) {
set = 1;
param.txtime = HZ * strtod(*option++, &end);
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--sqdelay")) {
option++;
if (*option != NULL) {
set = 1;
param.sqdelay = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--slottime")) {
option++;
if (*option != NULL) {
set = 1;
param.slottime = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--waittime")) {
option++;
if (*option != NULL) {
set = 1;
param.waittime = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--persist")) {
option++;
if (*option != NULL) {
set = 1;
param.persist = strtol(*option++, &end, 0);
if (*end) error = 1;
} else error = 1;
} else if (!strcmp(*option, "--dma")) {
option++;
if (*option != NULL) {
set = 1;
param.dma = strtol(*option++, &end, 0);
if (*end) error = 1;
} else error = 1;
} else error = 1;
}
if (error) {
usage(argv[0]);
close(sk);
return 1;
}
if (set) {
if (ioctl(sk, SIOCSSCCPARAM, &ifr) < 0) {
perror("ioctl");
close(sk);
return 4;
}
}
if (show) {
double speed;
if (param.brg_tc < 0) speed = 0.0;
else speed = ((double) param.pclk_hz) / ( 2 * (param.brg_tc + 2));
printf("speed = %.2f\nnrzi = %d\nclocks = 0x%02X\n"
"txdelay = %.2f ms\ntxtime = %.2f s\nsqdelay = %.2f ms\n"
"slottime = %.2f ms\nwaittime = %.2f ms\npersist = %d\n"
"dma = %d\n",
speed, param.nrzi, param.clocks,
param.txdelay * 1000.0 / TMR_0_HZ,
(double) param.txtime / HZ,
param.sqdelay * 1000.0 / TMR_0_HZ,
param.slottime * 1000.0 / TMR_0_HZ,
param.waittime * 1000.0 / TMR_0_HZ,
param.persist, param.dma);
}
close(sk);
return 0;
}
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