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WinUAE/serial.cpp
Toni Wilen e981fde9b7 portability patch part 2
2012-05-19 09:57:21 +03:00

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/*
* UAE - The Un*x Amiga Emulator
*
* Serial Line Emulation
*
* (c) 1996, 1997 Stefan Reinauer <stepan@linux.de>
* (c) 1997 Christian Schmitt <schmitt@freiburg.linux.de>
*
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "config.h"
#include "options.h"
#include "uae.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "cia.h"
#undef POSIX_SERIAL
/* Some more or less good way to determine whether we can safely compile in
* the serial stuff. I'm certain it breaks compilation on some systems. */
#if defined HAVE_SYS_TERMIOS_H && defined HAVE_POSIX_OPT_H && defined HAVE_SYS_IOCTL_H && defined HAVE_TCGETATTR
#define POSIX_SERIAL
#endif
#ifdef POSIX_SERIAL
#include <termios.h>
#include <unistd.h>
#include <sys/ioctl.h>
#endif
#if !defined B300 || !defined B1200 || !defined B2400 || !defined B4800 || !defined B9600
#undef POSIX_SERIAL
#endif
#if !defined B19200 || !defined B57600 || !defined B115200 || !defined B230400
#undef POSIX_SERIAL
#endif
#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
#define SERIALDEBUG 1 /* 0, 1, 2 3 */
#define MODEMTEST 0 /* 0 or 1 */
void serial_open (void);
void serial_close (void);
void serial_init (void);
void serial_exit (void);
void serial_dtr_on (void);
void serial_dtr_off (void);
void serial_flush_buffer (void);
static int serial_read (char *buffer);
uae_u16 SERDATR (void);
int SERDATS (void);
void SERPER (uae_u16 w);
void SERDAT (uae_u16 w);
static char inbuf[1024], outbuf[1024];
static int inptr, inlast, outlast;
int waitqueue=0,
carrier=0,
serdev=0,
dsr=0,
dtr=0,
isbaeh=0,
doreadser=0,
serstat=-1;
int sd = -1;
#ifdef POSIX_SERIAL
struct termios tios;
#endif
uae_u16 serper=0,serdat;
void SERPER (uae_u16 w)
{
int baud=0, pspeed;
if (!currprefs.use_serial)
return;
#if defined POSIX_SERIAL
if (serper == w) /* don't set baudrate if it's already ok */
return;
serper=w;
if (w&0x8000)
write_log ("SERPER: 9bit transmission not implemented.\n");
switch (w & 0x7fff) {
/* These values should be calculated by the current
* color clock value (NTSC/PAL). But this solution is
* easy and it works.
*/
case 0x2e9b:
case 0x2e14: baud=300; pspeed=B300; break;
case 0x170a:
case 0x0b85: baud=1200; pspeed=B1200; break;
case 0x05c2:
case 0x05b9: baud=2400; pspeed=B2400; break;
case 0x02e9:
case 0x02e1: baud=4800; pspeed=B4800; break;
case 0x0174:
case 0x0170: baud=9600; pspeed=B9600; break;
case 0x00b9:
case 0x00b8: baud=19200; pspeed=B19200; break;
case 0x005c:
case 0x005d: baud=38400; pspeed=B38400; break;
case 0x003d: baud=57600; pspeed=B57600; break;
case 0x001e: baud=115200; pspeed=B115200; break;
case 0x000f: baud=230400; pspeed=B230400; break;
default:
write_log ("SERPER: unsupported baudrate (0x%04x) %d\n",w&0x7fff,
(unsigned int)(3579546.471/(double)((w&0x7fff)+1))); return;
}
/* Only access hardware when we own it */
if (serdev == 1) {
if (tcgetattr (sd, &tios) < 0) {
write_log ("SERPER: TCGETATTR failed\n");
return;
}
if (cfsetispeed (&tios, pspeed) < 0) { /* set serial input speed */
write_log ("SERPER: CFSETISPEED (%d bps) failed\n", baud);
return;
}
if (cfsetospeed (&tios, pspeed) < 0) { /* set serial output speed */
write_log ("SERPER: CFSETOSPEED (%d bps) failed\n", baud);
return;
}
if (tcsetattr (sd, TCSADRAIN, &tios) < 0) {
write_log ("SERPER: TCSETATTR failed\n");
return;
}
}
#endif
#if SERIALDEBUG > 0
if (serdev == 1)
write_log ("SERPER: baudrate set to %d bit/sec\n", baud);
#endif
}
/* Not (fully) implemented yet:
*
* - Something's wrong with the Interrupts.
* (NComm works, TERM does not. TERM switches to a
* blind mode after a connect and wait's for the end
* of an asynchronous read before switching blind
* mode off again. It never gets there on UAE :-< )
*
* - RTS/CTS handshake, this is not really neccessary,
* because you can use RTS/CTS "outside" without
* passing it through to the emulated Amiga
*
* - ADCON-Register ($9e write, $10 read) Bit 11 (UARTBRK)
* (see "Amiga Intern", pg 246)
*/
void SERDAT (uae_u16 w)
{
unsigned char z;
if (!currprefs.use_serial)
return;
z = (unsigned char)(w&0xff);
if (currprefs.serial_demand && !dtr) {
if (!isbaeh) {
write_log ("SERDAT: Baeh.. Your software needs SERIAL_ALWAYS to work properly.\n");
isbaeh=1;
}
return;
} else {
outbuf[outlast++] = z;
if (outlast == sizeof outbuf)
serial_flush_buffer();
}
#if SERIALDEBUG > 2
write_log ("SERDAT: wrote 0x%04x\n", w);
#endif
serdat|=0x2000; /* Set TBE in the SERDATR ... */
intreq|=1; /* ... and in INTREQ register */
return;
}
uae_u16 SERDATR (void)
{
if (!currprefs.use_serial)
return 0;
#if SERIALDEBUG > 2
write_log ("SERDATR: read 0x%04x\n", serdat);
#endif
waitqueue = 0;
return serdat;
}
int SERDATS (void)
{
unsigned char z;
if (!serdev) /* || (serdat&0x4000)) */
return 0;
if (waitqueue == 1) {
intreq |= 0x0800;
return 1;
}
if ((serial_read ((char *)&z)) == 1) {
waitqueue = 1;
serdat = 0x4100; /* RBF and STP set! */
serdat |= ((unsigned int)z) & 0xff;
intreq |= 0x0800; /* Set RBF flag (Receive Buffer full) */
#if SERIALDEBUG > 1
write_log ("SERDATS: received 0x%02x --> serdat==0x%04x\n",
(unsigned int)z, (unsigned int)serdat);
#endif
return 1;
}
return 0;
}
void serial_dtr_on(void)
{
#if SERIALDEBUG > 0
write_log ("DTR on.\n");
#endif
dtr=1;
if (currprefs.serial_demand)
serial_open ();
}
void serial_dtr_off(void)
{
#if SERIALDEBUG > 0
write_log ("DTR off.\n");
#endif
dtr=0;
if (currprefs.serial_demand)
serial_close ();
}
static int serial_read (char *buffer)
{
if (inptr < inlast) {
*buffer = inbuf[inptr++];
return 1;
}
if (serdev == 1) {
inlast = read (sd, inbuf, sizeof inbuf);
inptr = 0;
if (inptr < inlast) {
*buffer = inbuf[inptr++];
return 1;
}
}
return 0;
}
void serial_flush_buffer(void)
{
if (serdev == 1) {
if (outlast) {
if (sd != 0) {
write (sd, outbuf, outlast);
}
}
outlast = 0;
} else {
outlast = 0;
inptr = 0;
inlast = 0;
}
}
uae_u8 serial_readstatus(uae_u8 ignored)
{
int status = 0;
#ifdef POSIX_SERIAL
ioctl (sd, TIOCMGET, &status);
if (status & TIOCM_CAR) {
if (!carrier) {
ciabpra |= 0x20; /* Push up Carrier Detect line */
carrier = 1;
#if SERIALDEBUG > 0
write_log ("Carrier detect.\n");
#endif
}
} else {
if (carrier) {
ciabpra &= ~0x20;
carrier = 0;
#if SERIALDEBUG > 0
write_log ("Carrier lost.\n");
#endif
}
}
if (status & TIOCM_DSR) {
if (!dsr) {
ciabpra |= 0x08; /* DSR ON */
dsr = 1;
}
} else {
if (dsr) {
ciabpra &= ~0x08;
dsr = 0;
}
}
#endif
return status;
}
uae_u8 serial_writestatus (uae_u8 old, uae_u8 nw)
{
if ((old & 0x80) == 0x80 && (nw & 0x80) == 0x00)
serial_dtr_on();
if ((old & 0x80) == 0x00 && (nw & 0x80) == 0x80)
serial_dtr_off();
if ((old & 0x40) != (nw & 0x40))
write_log ("RTS %s.\n", ((nw & 0x40) == 0x40) ? "set" : "cleared");
if ((old & 0x10) != (nw & 0x10))
write_log ("CTS %s.\n", ((nw & 0x10) == 0x10) ? "set" : "cleared");
return nw; /* This value could also be changed here */
}
void serial_open(void)
{
if (serdev == 1)
return;
if ((sd = open (currprefs.sername, O_RDWR|O_NONBLOCK|O_BINARY, 0)) < 0) {
write_log ("Error: Could not open Device %s\n", currprefs.sername);
return;
}
serdev = 1;
#ifdef POSIX_SERIAL
if (tcgetattr (sd, &tios) < 0) { /* Initialize Serial tty */
write_log ("Serial: TCGETATTR failed\n");
return;
}
cfmakeraw (&tios);
#ifndef MODEMTEST
tios.c_cflag &= ~CRTSCTS; /* Disable RTS/CTS */
#else
tios.c_cflag |= CRTSCTS; /* Enabled for testing modems */
#endif
if (tcsetattr (sd, TCSADRAIN, &tios) < 0) {
write_log ("Serial: TCSETATTR failed\n");
return;
}
#endif
}
void serial_close (void)
{
if (sd >= 0)
close (sd);
serdev = 0;
}
void serial_init (void)
{
if (!currprefs.use_serial)
return;
if (!currprefs.serial_demand)
serial_open ();
serdat = 0x2000;
return;
}
void serial_exit (void)
{
serial_close (); /* serial_close can always be called because it */
dtr = 0; /* just closes *opened* filehandles which is ok */
return; /* when exiting. */
}
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