struct port *__libnet_internal__serial_open(int portnum)
{
struct port *p;
int uart, baudrate, cfg;
if ((portnum < 0) || (portnum >= MAX_PORT))
return NULL;
p = port_table[portnum];
memset(p, 0, sizeof *p);
if (config[portnum].baseaddr == -1) {
dosmemget(0x400 + portnum * 2, 2, &p->baseaddr);
if (p->baseaddr == 0)
p->baseaddr = fallback_baseaddr[portnum];
}
else {
p->baseaddr = config[portnum].baseaddr;
}
uart = detect_uart(p->baseaddr);
if (!uart)
return NULL;
if (uart == UART_16550A)
enable_fifo(p);
else
disable_fifo(p);
install_isr(portnum, p, config[portnum].irq);
set_config(p->baseaddr, config[portnum].baudrate,
(config[portnum].bits
| config[portnum].parity
| config[portnum].stopbits));
return p;
}
void auto_detect_uart(char *param)
{
while(1){
detect_uart("");
}
}