pcvt_drv.c

freebsd v4.4内核源码

#if PCVT_EMU_MOUSE
	if(i == totalscreens)
		mouse.opened = 0;
	else
#endif /* PCVT_EMU_MOUSE */

	vsx->openf = 0;

#if PCVT_USL_VT_COMPAT
#if PCVT_EMU_MOUSE

	if(i == totalscreens)
		return (0);

#endif /* PCVT_EMU_MOUSE */

	reset_usl_modes(vsx);

#endif /* PCVT_USL_VT_COMPAT */

	return(0);
}

int
pcread(Dev_t dev, struct uio *uio, int flag)
{
	register struct tty *tp;

	if((tp = get_pccons(dev)) == NULL)
		return ENXIO;

	return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}

int
pcwrite(Dev_t dev, struct uio *uio, int flag)
{
	register struct tty *tp;

	if((tp = get_pccons(dev)) == NULL)
		return ENXIO;

	return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}

int
pcioctl(Dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
{
	register error;
	register struct tty *tp;

	if((tp = get_pccons(dev)) == NULL)
		return(ENXIO);

	/* note that some ioctl's are global, e.g.  KBSTPMAT: There is
	 * only one keyboard and different repeat rates for instance between
	 * sessions are a suspicious wish. If you really need this make the
	 * appropriate variables arrays
	 */

#if PCVT_EMU_MOUSE
	if(minor(dev) == totalscreens)
	{
		if((error = mouse_ioctl(dev, cmd, data)) >= 0)
			return error;
		goto do_standard;
	}
#endif /* PCVT_EMU_MOUSE */

#ifdef XSERVER
#if PCVT_USL_VT_COMPAT

	if((error = usl_vt_ioctl(dev, cmd, data, flag, p)) >= 0)
		return error;

	/*
	 * just for compatibility:
	 * XFree86 < 2.0 and SuperProbe still might use it
	 *
	 * NB: THIS IS A HACK! Do not use it unless you explicitly need.
	 * Especially, since the vty is not put into process-controlled
	 * mode (this would require the application to co-operate), any
	 * attempts to switch vtys while this kind of X mode is active
	 * may cause serious trouble.
	 */
	switch(cmd)
	{
	  case CONSOLE_X_MODE_ON:
	  {
	    int i;

	    if((error = usl_vt_ioctl(dev, KDENABIO, 0, flag, p)) > 0)
	      return error;

	    i = KD_GRAPHICS;
	    if((error = usl_vt_ioctl(dev, KDSETMODE, (caddr_t)&i, flag, p))
	       > 0)
	      return error;

	    i = K_RAW;
	    error = usl_vt_ioctl(dev, KDSKBMODE, (caddr_t)&i, flag, p);
	    return error;
	  }

	  case CONSOLE_X_MODE_OFF:
	  {
	    int i;

	    (void)usl_vt_ioctl(dev, KDDISABIO, 0, flag, p);

	    i = KD_TEXT;
	    (void)usl_vt_ioctl(dev, KDSETMODE, (caddr_t)&i, flag, p);

	    i = K_XLATE;
	    (void)usl_vt_ioctl(dev, KDSKBMODE, (caddr_t)&i, flag, p);
	    return 0;
	  }


	  case CONSOLE_X_BELL:

		/*
		 * If `data' is non-null, the first int value denotes
		 * the pitch, the second a duration. Otherwise, behaves
		 * like BEL.
		 */

		if (data)
		{

#if PCVT_NETBSD
			sysbeep(((int *)data)[0],
				((int *)data)[1] * hz / 1000);
#else /* PCVT_NETBSD */
			sysbeep(PCVT_SYSBEEPF / ((int *)data)[0],
				((int *)data)[1] * hz / 3000);
#endif /* PCVT_NETBSD */

		}
		else
		{
			sysbeep(PCVT_SYSBEEPF / 1493, hz / 4);
		}
		return (0);

	  default: /* fall through */ ;
	}

#else /* PCVT_USL_VT_COMPAT */

	switch(cmd)
	{
	  case CONSOLE_X_MODE_ON:
		return pcvt_xmode_set(1, p);

	  case CONSOLE_X_MODE_OFF:
		return pcvt_xmode_set(0, p);

	  case CONSOLE_X_BELL:

		/*
		 * If `data' is non-null, the first int value denotes
		 * the pitch, the second a duration. Otherwise, behaves
		 * like BEL.
		 */

		if (data)
		{

#if PCVT_NETBSD
			sysbeep(((int *)data)[0],
				((int *)data)[1] * hz / 1000);
#else /* PCVT_NETBSD */
			sysbeep(PCVT_SYSBEEPF / ((int *)data)[0],
				((int *)data)[1] * hz / 3000);
#endif /* PCVT_NETBSD */

		}
		else
		{
			sysbeep(PCVT_SYSBEEPF / 1493, hz / 4);
		}
		return (0);

	  default: /* fall through */ ;
	}

#endif /* PCVT_USL_VT_COMPAT */
#endif /* XSERVER */

	if((error = kbdioctl(dev,cmd,data,flag)) >= 0)
		return error;

	if((error = vgaioctl(dev,cmd,data,flag)) >= 0)
		return error;

#if PCVT_EMU_MOUSE
do_standard:
#endif

#if PCVT_NETBSD > 9 || PCVT_FREEBSD >= 200
	if((error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p)) >= 0)
		return (error);
#else
	if((error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag)) >= 0)
		return(error);
#endif /* PCVT_NETBSD > 9 || PCVT_FREEBSD >= 200 */

#if PCVT_NETBSD > 9
	if((error = ttioctl(tp, cmd, data, flag, p)) >= 0)
		return (error);
#else
	if((error = ttioctl(tp, cmd, data, flag)) >= 0)
		return (error);
#endif /* PCVT_NETBSD > 9 */

	return (ENOTTY);
}

int
pcmmap(Dev_t dev, vm_offset_t offset, int nprot)
{
	if (offset > 0x20000 - PAGE_SIZE)
		return -1;
	return i386_btop((0xa0000 + offset));
}

/*---------------------------------------------------------------------------*
 *
 *	handle a keyboard receive interrupt
 *
 *	NOTE: the keyboard is multiplexed by means of "pcconsp"
 *	between virtual screens. pcconsp - switching is done in
 *	the vgapage() routine
 *
 *---------------------------------------------------------------------------*/

#if PCVT_KBD_FIFO

u_char pcvt_kbd_fifo[PCVT_KBD_FIFO_SZ];
int pcvt_kbd_wptr = 0;
int pcvt_kbd_rptr = 0;
short pcvt_kbd_count= 0;
static u_char pcvt_timeout_scheduled = 0;

static void
pcvt_timeout(void *arg)
{
	u_char *cp;

#if PCVT_SLOW_INTERRUPT
	int	s;
#endif

	pcvt_timeout_scheduled = 0;

#if PCVT_SCREENSAVER
	pcvt_scrnsv_reset();
#endif /* PCVT_SCREENSAVER */

	while (pcvt_kbd_count)
	{
		if (((cp = sgetc(1)) != 0) &&
		    (vs[current_video_screen].openf))
		{

#if PCVT_NULLCHARS
			if(*cp == '\0')
			{
				/* pass a NULL character */
				(*linesw[pcconsp->t_line].l_rint)('\0', pcconsp);
			}
/* XXX */		else
#endif /* PCVT_NULLCHARS */

			while (*cp)
				(*linesw[pcconsp->t_line].l_rint)(*cp++ & 0xff, pcconsp);
		}

		PCVT_DISABLE_INTR ();

		if (!pcvt_kbd_count)
			pcvt_timeout_scheduled = 0;

		PCVT_ENABLE_INTR ();
	}

	return;
}
#endif


void
pcrint(int unit)
{

#if PCVT_KBD_FIFO
	u_char	dt;
	u_char	ret = -1;

# if PCVT_SLOW_INTERRUPT
	int	s;
# endif

# ifdef _I386_ISA_KBDIO_H_
	int	c;
# endif

#else /* !PCVT_KBD_FIFO */
	u_char	*cp;
#endif /* PCVT_KBD_FIFO */

	/*
	 * in case the keyboard was not plugged in while booting, kbdc
	 * was set to NULL at that time. When a keyboard IRQ occurs and
	 * kbdc is NULL, the keyboard was probably reconnected to the
	 * keyboard controller and we have to initialize the keyboard.
	 */
	 
	if(kbdc == NULL)
	{
		kbdc = kbdc_open(IO_KBD);
		if(kbdc == NULL)
		{
			reset_keyboard = 0;
			return;
		}
		reset_keyboard = 1;
		kbd_code_init();
	}

#if PCVT_SCREENSAVER
	pcvt_scrnsv_reset();
#endif /* PCVT_SCREENSAVER */

#if PCVT_KBD_FIFO
	if (kbd_polling)
	{
		sgetc(1);
		return;
	}

# ifndef _I386_ISA_KBDIO_H_
	while (inb(CONTROLLER_CTRL) & STATUS_OUTPBF)	/* check 8042 buffer */
	{
		ret = 1;				/* got something */

		PCVT_KBD_DELAY();			/* 7 us delay */

		dt = inb(CONTROLLER_DATA);		/* get it 8042 data */
# else 
	while ((c = read_kbd_data_no_wait(kbdc)) != -1)
	{
		ret = 1;				/* got something */
		dt = c;
# endif /* _I386_ISA_KBDIO_H_ */

		if (pcvt_kbd_count >= PCVT_KBD_FIFO_SZ)	/* fifo overflow ? */
		{
			log (LOG_WARNING, "pcvt: keyboard buffer overflow\n");
		}
		else
		{
			pcvt_kbd_fifo[pcvt_kbd_wptr++] = dt; /* data -> fifo */

			PCVT_DISABLE_INTR ();	/* XXX necessary ? */
			pcvt_kbd_count++;		/* update fifo count */
			PCVT_ENABLE_INTR ();

			if (pcvt_kbd_wptr >= PCVT_KBD_FIFO_SZ)
				pcvt_kbd_wptr = 0;	/* wraparound pointer */
		}
	}

	if (ret == 1)	/* got data from keyboard ? */
	{
		if (!pcvt_timeout_scheduled)	/* if not already active .. */
		{
			PCVT_DISABLE_INTR ();
			pcvt_timeout_scheduled = 1;	/* flag active */
			timeout(pcvt_timeout, NULL, hz / 100);	/* fire off */
			PCVT_ENABLE_INTR ();
		}
	}

#else /* !PCVT_KBD_FIFO */

	if((cp = sgetc(1)) == 0)
		return;

	if (kbd_polling)
		return;

	if(!(vs[current_video_screen].openf))	/* XXX was vs[minor(dev)] */
		return;

#if PCVT_NULLCHARS
	if(*cp == '\0')
	{
		/* pass a NULL character */
		(*linesw[pcconsp->t_line].l_rint)('\0', pcconsp);
		return;
	}
#endif /* PCVT_NULLCHARS */

	while (*cp)
		(*linesw[pcconsp->t_line].l_rint)(*cp++ & 0xff, pcconsp);

#endif /* PCVT_KBD_FIFO */
}


#if PCVT_NETBSD || PCVT_FREEBSD >= 200

void
pcstart(register struct tty *tp)
{
	register struct clist *rbp;
	int s, len;
	u_char buf[PCVT_PCBURST];

	s = spltty();

	if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
		goto out;

	tp->t_state |= TS_BUSY;

	splx(s);

	async_update(UPDATE_KERN);

	rbp = &tp->t_outq;

	/*
	 * Call q_to_b() at spltty() to ensure that the queue is empty when
	 * the loop terminates.
	 */

	s = spltty();

	while (len = q_to_b(rbp, buf, PCVT_PCBURST))
	{
		/*
		 * We need to do this outside spl since it could be fairly
		 * expensive and we don't want our serial ports to overflow.
		 */
		splx(s);
		sput(&buf[0], 0, len, minor(tp->t_dev));
		s = spltty();
	}

	tp->t_state &= ~TS_BUSY;

#ifndef TS_ASLEEP /* FreeBSD some time after 2.0.5 */
	ttwwakeup(tp);
#else
	if (rbp->c_cc <= tp->t_lowat)
	{
		if (tp->t_state&TS_ASLEEP)
		{
			tp->t_state &= ~TS_ASLEEP;
			wakeup((caddr_t)rbp);
		}
		selwakeup(&tp->t_wsel);
	}
#endif
out:
	splx(s);
}

void
pcstop(struct tty *tp, int flag)
{
}

#else /* PCVT_NETBSD || PCVT_FREEBSD >= 200 */

void
pcstart(struct tty *tp)
{
	int s;
	unsigned char c;

	s = spltty();

	if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
	{
		goto out;
	}

	for(;;)
	{

#if !(PCVT_FREEBSD > 114)

#if !(PCVT_FREEBSD > 111)
		if (RB_LEN(&tp->t_out) <= tp->t_lowat)
#else
		if (RB_LEN(tp->t_out) <= tp->t_lowat)
#endif
		{
			if (tp->t_state&TS_ASLEEP)
			{
				tp->t_state &= ~TS_ASLEEP;
#if !(PCVT_FREEBSD > 111)
				wakeup((caddr_t)&tp->t_out);
#else
				wakeup((caddr_t)tp->t_out);
#endif
			}

			if (tp->t_wsel)
			{
				selwakeup(tp->t_wsel, tp->t_state & TS_WCOLL);
				tp->t_wsel = 0;
				tp->t_state &= ~TS_WCOLL;
			}
		}

#else /* PCVT_FREEBSD > 114 */
		if (tp->t_state & (TS_SO_OCOMPLETE | TS_SO_OLOWAT)
		    || tp->t_wsel) {
			ttwwakeup(tp);
		}
#endif /* !PCVT_FREEBSD > 114 */

#if !(PCVT_FREEBSD > 111)
		if (RB_LEN(&tp->t_out) == 0)
#else
		if (RB_LEN(tp->t_out) == 0)
#endif
		{
			goto out;
		}

#if !(PCVT_FREEBSD > 111)
		c = getc(&tp->t_out);
#else
		c = getc(tp->t_out);
#endif

		tp->t_state |= TS_BUSY;	/* patch from Frank Maclachlan */
		splx(s);
		sput(&c, 0, 1, minor(tp->t_dev));
		spltty();