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freebsd-skq/sys/i386/isa/pcvt/pcvt_drv.c

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/*
* Copyright (c) 1999, 2000 Hellmuth Michaelis
*
* Copyright (c) 1992, 1995 Hellmuth Michaelis and Joerg Wunsch.
*
* Copyright (c) 1992, 1993 Brian Dunford-Shore and Scott Turner.
*
* Copyright (c) 1993 Charles Hannum.
*
* All rights reserved.
*
* Parts of this code regarding the NetBSD interface were written
* by Charles Hannum.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz and Don Ahn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Hellmuth Michaelis, Brian Dunford-Shore, Joerg Wunsch, Scott Turner
* and Charles Hannum.
* 4. The name authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*
*
* pcvt_drv.c VT220 Driver Main Module / OS - Interface
* ---------------------------------------------------------
*
* Last Edit-Date: [Sat Jul 15 15:06:06 2000]
*
* $FreeBSD$
*
*---------------------------------------------------------------------------*/
#define MAIN
#include <i386/isa/pcvt/pcvt_hdr.h>
#undef MAIN
#include <sys/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <isa/isareg.h>
#include <isa/isavar.h>
static kbd_callback_func_t pcvt_event;
static int pcvt_kbd_wptr = 0;
static u_char pcvt_timeout_scheduled = 0;
static void vgapelinit(void);
static void detect_kbd(void *arg);
static void pcvt_start(register struct tty *tp);
static int pcvt_param(struct tty *tp, struct termios *t);
static cn_probe_t pcvt_cn_probe;
static cn_init_t pcvt_cn_init;
static cn_term_t pcvt_cn_term;
static cn_getc_t pcvt_cn_getc;
static cn_checkc_t pcvt_cn_checkc;
static cn_putc_t pcvt_cn_putc;
CONS_DRIVER(vt, pcvt_cn_probe, pcvt_cn_init, pcvt_cn_term, pcvt_cn_getc,
pcvt_cn_checkc, pcvt_cn_putc, NULL);
static d_open_t pcvt_open;
static d_close_t pcvt_close;
static d_ioctl_t pcvt_ioctl;
static d_mmap_t pcvt_mmap;
#define CDEV_MAJOR 12
static struct cdevsw vt_cdevsw = {
/* open */ pcvt_open,
/* close */ pcvt_close,
/* read */ ttyread,
/* write */ ttywrite,
/* ioctl */ pcvt_ioctl,
/* poll */ ttypoll,
/* mmap */ pcvt_mmap,
/* strategy */ nostrategy,
/* name */ "vt",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_TTY | D_KQFILTER,
/* kqfilter */ ttykqfilter,
};
static int pcvt_probe(device_t dev);
static int pcvt_attach(device_t dev);
static void pcvt_identify (driver_t *driver, device_t parent);
static device_method_t pcvt_methods[] = {
DEVMETHOD(device_identify, pcvt_identify),
DEVMETHOD(device_probe, pcvt_probe),
DEVMETHOD(device_attach, pcvt_attach),
DEVMETHOD(bus_print_child, bus_generic_print_child),
{ 0, 0 }
};
static driver_t pcvt_driver = {
"vt",
pcvt_methods,
0
};
static devclass_t pcvt_devclass;
DRIVER_MODULE(pcvt, isa, pcvt_driver, pcvt_devclass, 0, 0);
/*---------------------------------------------------------------------------*
* driver identify
*---------------------------------------------------------------------------*/
static void
pcvt_identify (driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "vt", 0);
}
/*---------------------------------------------------------------------------*
* driver probe
*---------------------------------------------------------------------------*/
static int
pcvt_probe(device_t dev)
{
int i;
device_t bus;
int unit = device_get_unit(dev);
/* No pnp support */
if(isa_get_vendorid(dev))
return ENXIO;
if(unit != 0)
return ENXIO;
device_set_desc(dev, "pcvt VT220 console driver");
bus = device_get_parent(dev);
bus_set_resource(dev, SYS_RES_IOPORT, 0, 0x3b0, 0x30);
bus_set_resource(dev, SYS_RES_MEMORY, 0, (u_long) Crtat, 0x8000);
if (kbd == NULL)
{
reset_keyboard = 0;
kbd_configure(KB_CONF_PROBE_ONLY);
i = kbd_allocate("*", -1, (void *)&kbd, pcvt_event, (void *)&vs[unit]);
if ((i < 0) || ((kbd = kbd_get_keyboard(i)) == NULL))
return 0;
}
reset_keyboard = 1; /* it's now safe to do kbd reset */
kbd_code_init();
return 0;
}
/*---------------------------------------------------------------------------*
* driver attach
*---------------------------------------------------------------------------*/
static int
pcvt_attach(device_t dev)
{
int i;
struct resource *port;
struct resource *mem;
int unit = device_get_unit(dev);
if(unit != 0)
return ENXIO;
i = 0;
port = bus_alloc_resource(dev, SYS_RES_IOPORT, &i, 0, ~0, 0,
RF_ACTIVE | RF_SHAREABLE);
i = 0;
mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &i, 0, ~0, 0,
RF_ACTIVE | RF_SHAREABLE);
vt_coldmalloc(); /* allocate memory for screens */
if (kbd == NULL)
timeout(detect_kbd, (void *)&vs[unit], hz*2);
printf("vt%d: ", unit);
switch(adaptor_type)
{
case MDA_ADAPTOR:
printf("MDA");
break;
case CGA_ADAPTOR:
printf("CGA");
break;
case EGA_ADAPTOR:
printf("EGA");
break;
case VGA_ADAPTOR:
printf("%s VGA, ", (char *)vga_string(vga_type));
if(can_do_132col)
printf("80/132 columns");
else
printf("80 columns");
vgapelinit();
break;
default:
printf("unknown");
break;
}
if(color == 0)
printf(", mono");
else
printf(", color");
printf(", %d screens, ", totalscreens);
switch(keyboard_type)
{
case KB_AT:
printf("AT-");
break;
case KB_MFII:
printf("MF2-");
break;
default:
printf("unknown ");
break;
}
printf("keyboard\n");
for(i = 0; i < totalscreens; i++)
{
ttyregister(&pcvt_tty[i]);
vs[i].vs_tty = &pcvt_tty[i];
make_dev(&vt_cdevsw, i, UID_ROOT, GID_WHEEL, 0600, "ttyv%r", i);
}
async_update(UPDATE_START); /* start asynchronous updates */
return 0;
}
/*---------------------------------------------------------------------------*
* driver open
*---------------------------------------------------------------------------*/
static int
pcvt_open(dev_t dev, int flag, int mode, struct thread *td)
{
register struct tty *tp;
register struct video_state *vsx;
int s, retval;
int winsz = 0;
int i = minor(dev);
vsx = &vs[i];
if(i >= PCVT_NSCREENS)
return ENXIO;
tp = &pcvt_tty[i];
dev->si_tty = tp;
vsx->openf++;
tp->t_oproc = pcvt_start;
tp->t_param = pcvt_param;
tp->t_stop = nottystop;
tp->t_dev = dev;
if ((tp->t_state & TS_ISOPEN) == 0)
{
ttychars(tp);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
pcvt_param(tp, &tp->t_termios);
(*linesw[tp->t_line].l_modem)(tp, 1); /* fake connection */
winsz = 1; /* set winsize later */
}
else if (tp->t_state & TS_XCLUDE && suser(td))
{
return (EBUSY);
}
retval = ((*linesw[tp->t_line].l_open)(dev, tp));
if(winsz == 1)
{
/*
* The line discipline has clobbered t_winsize if TS_ISOPEN
* was clear. (NetBSD PR #400 from Bill Sommerfeld)
* We have to do this after calling the open routine, because
* it does some other things in other/older *BSD releases -hm
*/
s = spltty();
tp->t_winsize.ws_col = vsx->maxcol;
tp->t_winsize.ws_row = vsx->screen_rows;
tp->t_winsize.ws_xpixel = (vsx->maxcol == 80)? 720: 1056;
tp->t_winsize.ws_ypixel = 400;
splx(s);
}
return(retval);
}
/*---------------------------------------------------------------------------*
* driver close
*---------------------------------------------------------------------------*/
static int
pcvt_close(dev_t dev, int flag, int mode, struct thread *td)
{
register struct tty *tp;
register struct video_state *vsx;
int i = minor(dev);
vsx = &vs[i];
if(i >= PCVT_NSCREENS)
return ENXIO;
tp = &pcvt_tty[i];
(*linesw[tp->t_line].l_close)(tp, flag);
ttyclose(tp);
vsx->openf = 0;
#ifdef XSERVER
reset_usl_modes(vsx);
#endif /* XSERVER */
return(0);
}
/*---------------------------------------------------------------------------*
* driver ioctl
*---------------------------------------------------------------------------*/
static int
pcvt_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
register int error;
register struct tty *tp;
int i = minor(dev);
if(i >= PCVT_NSCREENS)
return ENXIO;
tp = &pcvt_tty[i];
/* 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
*/
#ifdef XSERVER
if((error = usl_vt_ioctl(dev, cmd, data, flag, td)) >= 0)
return error;
#endif /* XSERVER */
if((error = kbdioctl(dev,cmd,data,flag)) >= 0)
return error;
if((error = vgaioctl(dev,cmd,data,flag)) >= 0)
return error;
if((error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td))
!= ENOIOCTL)
return (error);
if((error = ttioctl(tp, cmd, data, flag)) != ENOIOCTL)
return (error);
return (ENOTTY);
}
/*---------------------------------------------------------------------------*
* driver mmap
*---------------------------------------------------------------------------*/
static int
pcvt_mmap(dev_t dev, vm_offset_t offset, int nprot)
{
if (offset > 0x20000 - PAGE_SIZE)
return -1;
return i386_btop((0xa0000 + offset));
}
/*---------------------------------------------------------------------------*
* timeout handler
*---------------------------------------------------------------------------*/
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[pcvt_ttyp->t_line].l_rint)('\0', pcvt_ttyp);
}
/* XXX */ else
#endif /* PCVT_NULLCHARS */
while (*cp)
(*linesw[pcvt_ttyp->t_line].l_rint)(*cp++ & 0xff, pcvt_ttyp);
}
PCVT_DISABLE_INTR ();
if (!pcvt_kbd_count)
pcvt_timeout_scheduled = 0;
PCVT_ENABLE_INTR ();
}
return;
}
/*---------------------------------------------------------------------------*
* check for keyboard
*---------------------------------------------------------------------------*/
static void
detect_kbd(void *arg)
{
int unit = (int)arg;
int i;
if (kbd != NULL)
return;
i = kbd_allocate("*", -1, (void *)&kbd, pcvt_event, (void *)unit);
if (i >= 0)
kbd = kbd_get_keyboard(i);
if (kbd != NULL)
{
reset_keyboard = 1; /* ok to reset the keyboard */
kbd_code_init();
return;
}
reset_keyboard = 0;
timeout(detect_kbd, (void *)unit, hz*2);
}
/*---------------------------------------------------------------------------*
* keyboard event handler
*---------------------------------------------------------------------------*/
static int
pcvt_event(keyboard_t *thiskbd, int event, void *arg)
{
int unit = (int)arg;
if (thiskbd != kbd)
return EINVAL; /* shouldn't happen */
switch (event) {
case KBDIO_KEYINPUT:
pcvt_rint(unit);
return 0;
case KBDIO_UNLOADING:
reset_keyboard = 0;
kbd = NULL;
kbd_release(thiskbd, (void *)&kbd);
timeout(detect_kbd, (void *)unit, hz*4);
return 0;
default:
return EINVAL;
}
}
/*---------------------------------------------------------------------------*
* (keyboard) interrupt handler
*---------------------------------------------------------------------------*/
void
pcvt_rint(int unit)
{
u_char dt;
u_char ret = -1;
int c;
# if PCVT_SLOW_INTERRUPT
int s;
# endif
#if PCVT_SCREENSAVER
pcvt_scrnsv_reset();
#endif /* PCVT_SCREENSAVER */
if (kbd_polling)
{
sgetc(1);
return;
}
while ((c = (*kbdsw[kbd->kb_index]->read)(kbd, FALSE)) != -1)
{
ret = 1; /* got something */
dt = c;
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 ();
}
}
}
/*---------------------------------------------------------------------------*
* start output
*---------------------------------------------------------------------------*/
static void
pcvt_start(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)) > 0)
{
if(vs[minor(tp->t_dev)].scrolling)
sgetc(SCROLLBACK_COOKIE);
/*
* 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;
ttwwakeup(tp);
out:
splx(s);
}
/*---------------------------------------------------------------------------*
* console probe
*---------------------------------------------------------------------------*/
static void
pcvt_cn_probe(struct consdev *cp)
{
int unit = 0;
int i;
/* See if this driver is disabled in probe hint. */
if (resource_int_value("vt", unit, "disabled", &i) == 0 && i)
{
cp->cn_pri = CN_DEAD;
return;
}
kbd_configure(KB_CONF_PROBE_ONLY);
if (kbd_find_keyboard("*", unit) < 0)
{
cp->cn_pri = CN_DEAD;
return;
}
/* initialize required fields */
cp->cn_dev = makedev(CDEV_MAJOR, 0);
cp->cn_pri = CN_INTERNAL;
cp->cn_tp = &pcvt_tty[0];
}
/*---------------------------------------------------------------------------*
* console init
*---------------------------------------------------------------------------*/
static void
pcvt_cn_init(struct consdev *cp)
{
int unit = 0;
int i;
pcvt_is_console = 1;
/*
* Don't reset the keyboard via `kbdio' just yet.
* The system clock has not been calibrated...
*/
reset_keyboard = 0;
if (kbd)
{
kbd_release(kbd, (void *)&kbd);
kbd = NULL;
}
i = kbd_allocate("*", -1, (void *)&kbd, pcvt_event, (void *)unit);
if (i >= 0)
kbd = kbd_get_keyboard(i);
#if PCVT_SCANSET == 2
/*
* Turn off scancode translation early so that
* DDB can read the keyboard.
*/
if (kbd)
{
empty_both_buffers(*(KBDC *)kbd->kb_data, 10);
set_controller_command_byte(*(KBDC *)kbd->kb_data,
KBD_TRANSLATION, 0);
}
#endif /* PCVT_SCANSET == 2 */
}
/*---------------------------------------------------------------------------*
* console finish
*---------------------------------------------------------------------------*/
static void
pcvt_cn_term(struct consdev *cp)
{
if (kbd)
{
kbd_release(kbd, (void *)&kbd);
kbd = NULL;
}
}
/*---------------------------------------------------------------------------*
* console put char
*---------------------------------------------------------------------------*/
static void
pcvt_cn_putc(dev_t dev, int c)
{
if (c == '\n')
sput("\r", 1, 1, 0);
sput((char *) &c, 1, 1, 0);
async_update(UPDATE_KERN);
}
/*---------------------------------------------------------------------------*
* console get char
*---------------------------------------------------------------------------*/
static int
pcvt_cn_getc(dev_t dev)
{
register int s;
static u_char *cp, cbuf[4]; /* Temp buf for multi-char key sequence. */
register u_char c;
#ifdef XSERVER
if (pcvt_kbd_raw)
return 0;
#endif /* XSERVER */
if (cp && *cp)
{
/*
* We still have a pending key sequence, e.g.
* from an arrow key. Deliver this one first.
*/
return (*cp++);
}
if (kbd == NULL)
return 0;
s = spltty(); /* block pcvt_rint while we poll */
kbd_polling = 1;
(*kbdsw[kbd->kb_index]->enable)(kbd);
cp = sgetc(0);
(*kbdsw[kbd->kb_index]->disable)(kbd);
kbd_polling = 0;
splx(s);
c = *cp++;
if (c && *cp)
{
/* Preserve the multi-char sequence for the next call. */
bcopy(cp, cbuf, 3); /* take care for a trailing '\0' */
cp = cbuf;
}
else
{
cp = 0;
}
return c;
}
/*---------------------------------------------------------------------------*
* console check for char
*---------------------------------------------------------------------------*/
static int
pcvt_cn_checkc(dev_t dev)
{
char *cp;
int x;
if (kbd == NULL)
return 0;
x = spltty();
kbd_polling = 1;
(*kbdsw[kbd->kb_index]->enable)(kbd);
cp = sgetc(1);
(*kbdsw[kbd->kb_index]->disable)(kbd);
kbd_polling = 0;
splx(x);
return (cp == NULL ? -1 : *cp);
}
/*---------------------------------------------------------------------------*
* Set line parameters
*---------------------------------------------------------------------------*/
static int
pcvt_param(struct tty *tp, struct termios *t)
{
tp->t_ispeed = t->c_ispeed;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
return(0);
}
/*----------------------------------------------------------------------*
* read initial VGA palette (as stored by VGA ROM BIOS) into
* palette save area
*----------------------------------------------------------------------*/
static void
vgapelinit(void)
{
register unsigned idx;
register struct rgb *val;
/* first, read all and store to first screen's save buffer */
for(idx = 0, val = vs[0].palette; idx < NVGAPEL; idx++, val++)
vgapaletteio(idx, val, 0 /* read it */);
/* now, duplicate for remaining screens */
for(idx = 1; idx < PCVT_NSCREENS; idx++)
bcopy(vs[0].palette, vs[idx].palette,
NVGAPEL * sizeof(struct rgb));
}
/*-------------------------- E O F -------------------------------------*/
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