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Tomasz Wlostowski
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <string.h>
#include <sys/signal.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <getopt.h>
#include <errno.h>
#include "spec-tools.h"
#include "wb_uart.h"
void *vuart_regs;
int vc_rx(void *ptr)
{
int csr ;
csr = *(int *)(ptr + UART_REG_HOST_RDR);
if(csr & UART_HOST_RDR_RDY)
return UART_HOST_RDR_DATA_R(csr);
else
return -1;
}
void vc_tx(void *ptr, int c)
{
while( *(int *)(ptr + UART_REG_SR) & UART_SR_RX_RDY);
Tomasz Wlostowski
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*(int *)(ptr + UART_REG_HOST_TDR) = UART_HOST_TDR_DATA_W(c);
}
int transfer_byte(int from, int is_control, void *ptr) {
char c;
int ret;
do {
ret = read(from, &c, 1);
} while (ret < 0 && errno == EINTR);
if(ret == 1) {
if(is_control) {
if(c == '\x01') { // C-a
return -1;
}
}
vc_tx(ptr, c);
} else {
fprintf(stderr, "\nnothing to read. probably port disconnected.\n");
return -2;
}
return 0;
}
void term_main(int keep_term)
{
struct termios oldkey, newkey; //place tor old and new port settings for keyboard teletype
int need_exit = 0;
fprintf(stderr, "[press C-a to exit]\n");
if(!keep_term) {
tcgetattr(STDIN_FILENO,&oldkey);
newkey.c_cflag = B9600 | CS8 | CLOCAL | CREAD;
newkey.c_iflag = IGNPAR;
newkey.c_oflag = 0;
newkey.c_lflag = 0;
newkey.c_cc[VMIN]=1;
newkey.c_cc[VTIME]=0;
tcflush(STDIN_FILENO, TCIFLUSH);
tcsetattr(STDIN_FILENO,TCSANOW,&newkey);
}
while(!need_exit) {
fd_set fds;
int ret, rx;
struct timeval tv = {0, 10000};
FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
ret = select(STDIN_FILENO+1, &fds, NULL, NULL, &tv);
if(ret == -1) {
perror("select");
} else if (ret > 0) {
if(FD_ISSET(STDIN_FILENO, &fds)) {
need_exit = transfer_byte(STDIN_FILENO, 1, vuart_regs);
}
}
while((rx = vc_rx(vuart_regs)) >= 0)
fprintf(stderr,"%c", (char)rx);
}
if(!keep_term)
tcsetattr(STDIN_FILENO,TCSANOW,&oldkey);
}
int main(int argc, char **argv)
{
int bus = -1, dev_fn = -1, c;
uint32_t vuart_base = 0xe0500;
void *map_base;
int keep_term = 0;
while ((c = getopt (argc, argv, "b:d:u:k")) != -1)
{
switch(c)
{
case 'b':
sscanf(optarg, "%i", &bus);
break;
case 'd':
sscanf(optarg, "%i", &dev_fn);
break;
case 'u':
sscanf(optarg, "%i", &vuart_base);
break;
case 'k':
keep_term = 1;
break;
default:
fprintf(stderr,
"Use: \"%s [-b bus] [-d devfn] [-u VUART base] [-k]\"\n", argv[0]);
fprintf(stderr,
"By default, the first available SPEC is used and the VUART is assumed at 0x%x.\n \
-k option keeps the terminal config unchanged.", vuart_base);
exit(1);
}
}
map_base = spec_map_area(bus, dev_fn, BASE_BAR0, 0x100000);
if(!map_base)
{
fprintf(stderr, "%s: can't map the SPEC @ %02x:%02x\n", argv[0], bus, dev_fn);
exit(1);
}
vuart_regs = map_base + vuart_base;
term_main(keep_term);
return 0;
}