NetBSD/sys/arch/sparc/dev/kd.c

692 lines
14 KiB
C

/* $NetBSD: kd.c,v 1.10 2000/03/24 11:46:46 hannken Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gordon W. Ross.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Console driver based on PROM primitives.
*
* This driver exists to provide a tty device that the indirect
* console driver can point to. It also provides a hook that
* allows another device to serve console input. This will normally
* be a keyboard driver (see sys/dev/sun/kbd.c)
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <machine/bsd_openprom.h>
#include <machine/promlib.h>
#include <machine/eeprom.h>
#include <machine/psl.h>
#include <machine/cpu.h>
#include <machine/kbd.h>
#include <machine/autoconf.h>
#include <machine/conf.h>
#ifdef RASTERCONSOLE
#include <machine/fbio.h>
#include <machine/fbvar.h>
#endif
#include <dev/cons.h>
#include <sparc/dev/cons.h>
#include <dev/sun/event_var.h>
#include <dev/sun/kbd_xlate.h>
#include <dev/sun/kbdvar.h>
#define KDMAJOR 1
#define PUT_WSIZE 64
struct kd_softc {
struct device kd_dev; /* required first: base device */
struct tty *kd_tty;
int rows, cols;
/* Console input hook */
struct cons_channel *kd_in;
};
/*
* There is no point in pretending there might be
* more than one keyboard/display device.
*/
static struct kd_softc kd_softc;
static int kdparam(struct tty *, struct termios *);
static void kdstart(struct tty *);
static void kd_init __P((struct kd_softc *));
static void kd_cons_input __P((int));
/*
* Prepare the console tty; called on first open of /dev/console
*/
void
kd_init(kd)
struct kd_softc *kd;
{
struct tty *tp;
tp = ttymalloc();
tp->t_oproc = kdstart;
tp->t_param = kdparam;
tp->t_dev = makedev(KDMAJOR, 0);
tty_attach(tp);
kd->kd_tty = tp;
/*
* Get the console struct winsize.
*/
#ifdef RASTERCONSOLE
/* If the raster console driver is attached, copy its size */
kd->rows = fbrcons_rows();
kd->cols = fbrcons_cols();
rcons_ttyinit(tp);
#endif
/* else, consult the PROM */
switch (prom_version()) {
char *prop;
struct eeprom *ep;
case PROM_OLDMON:
if ((ep = (struct eeprom *)eeprom_va) == NULL)
break;
if (kd->rows == 0)
kd->rows = (u_short)ep->eeTtyRows;
if (kd->cols == 0)
kd->cols = (u_short)ep->eeTtyCols;
break;
case PROM_OBP_V0:
case PROM_OBP_V2:
case PROM_OBP_V3:
case PROM_OPENFIRM:
if (kd->rows == 0 &&
(prop = getpropstring(optionsnode, "screen-#rows"))) {
int i = 0;
while (*prop != '\0')
i = i * 10 + *prop++ - '0';
kd->rows = (unsigned short)i;
}
if (kd->cols == 0 &&
(prop = getpropstring(optionsnode, "screen-#columns"))) {
int i = 0;
while (*prop != '\0')
i = i * 10 + *prop++ - '0';
kd->cols = (unsigned short)i;
}
break;
}
return;
}
struct tty *
kdtty(dev)
dev_t dev;
{
struct kd_softc *kd;
kd = &kd_softc; /* XXX */
return (kd->kd_tty);
}
int
kdopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct kd_softc *kd;
int error, s, unit;
struct tty *tp;
static int firstopen = 1;
unit = minor(dev);
if (unit != 0)
return ENXIO;
kd = &kd_softc; /* XXX */
if (firstopen) {
kd_init(kd);
firstopen = 0;
}
tp = kd->kd_tty;
/* It's simpler to do this up here. */
if (((tp->t_state & (TS_ISOPEN | TS_XCLUDE))
== (TS_ISOPEN | TS_XCLUDE))
&& (p->p_ucred->cr_uid != 0) )
{
return (EBUSY);
}
s = spltty();
if ((tp->t_state & TS_ISOPEN) == 0) {
/* First open. */
/* Notify the input device that serves us */
struct cons_channel *cc = kd->kd_in;
if (cc != NULL &&
(error = (*cc->cc_iopen)(cc)) != 0) {
return (error);
}
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;
(void) kdparam(tp, &tp->t_termios);
ttsetwater(tp);
tp->t_winsize.ws_row = kd->rows;
tp->t_winsize.ws_col = kd->cols;
/* Flush pending input? Clear translator? */
/* This (pseudo)device always has SOFTCAR */
tp->t_state |= TS_CARR_ON;
}
splx(s);
return ((*linesw[tp->t_line].l_open)(dev, tp));
}
int
kdclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct kd_softc *kd;
struct tty *tp;
struct cons_channel *cc;
kd = &kd_softc; /* XXX */
tp = kd->kd_tty;
/* XXX This is for cons.c. */
if ((tp->t_state & TS_ISOPEN) == 0)
return 0;
(*linesw[tp->t_line].l_close)(tp, flag);
ttyclose(tp);
if ((cc = kd->kd_in) != NULL)
(void)(*cc->cc_iclose)(cc->cc_dev);
return (0);
}
int
kdread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct kd_softc *kd;
struct tty *tp;
kd = &kd_softc; /* XXX */
tp = kd->kd_tty;
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
int
kdwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct kd_softc *kd;
struct tty *tp;
kd = &kd_softc; /* XXX */
tp = kd->kd_tty;
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
int
kdioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct kd_softc *kd;
struct tty *tp;
int error;
kd = &kd_softc; /* XXX */
tp = kd->kd_tty;
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
return error;
error = ttioctl(tp, cmd, data, flag, p);
if (error >= 0)
return error;
/* Handle any ioctl commands specific to kbd/display. */
/* XXX - Send KB* ioctls to kbd module? */
/* XXX - Send FB* ioctls to fb module? */
return ENOTTY;
}
void
kdstop(tp, flag)
struct tty *tp;
int flag;
{
}
static int
kdparam(tp, t)
struct tty *tp;
struct termios *t;
{
/* XXX - These are ignored... */
tp->t_ispeed = t->c_ispeed;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
return 0;
}
static void kd_later(void*);
static void kd_putfb(struct tty *);
static void
kdstart(tp)
struct tty *tp;
{
struct clist *cl;
int s;
s = spltty();
if (tp->t_state & (TS_BUSY|TS_TTSTOP|TS_TIMEOUT))
goto out;
cl = &tp->t_outq;
if (cl->c_cc) {
tp->t_state |= TS_BUSY;
if ((s & PSR_PIL) == 0) {
/* called at level zero - update screen now. */
(void) spllowersoftclock();
kd_putfb(tp);
(void) spltty();
tp->t_state &= ~TS_BUSY;
} else {
/* called at interrupt level - do it later */
callout_reset(&tp->t_rstrt_ch, 0, kd_later, tp);
}
}
if (cl->c_cc <= tp->t_lowat) {
if (tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup((caddr_t)cl);
}
selwakeup(&tp->t_wsel);
}
out:
splx(s);
}
/*
* Timeout function to do delayed writes to the screen.
* Called at splsoftclock when requested by kdstart.
*/
static void
kd_later(arg)
void *arg;
{
struct tty *tp = arg;
int s;
kd_putfb(tp);
s = spltty();
tp->t_state &= ~TS_BUSY;
(*linesw[tp->t_line].l_start)(tp);
splx(s);
}
/*
* Put text on the screen using the PROM monitor.
* This can take a while, so to avoid missing
* interrupts, this is called at splsoftclock.
*/
static void
kd_putfb(tp)
struct tty *tp;
{
char buf[PUT_WSIZE];
struct clist *cl = &tp->t_outq;
char *p, *end;
int len;
while ((len = q_to_b(cl, buf, PUT_WSIZE-1)) > 0) {
/* PROM will barf if high bits are set. */
p = buf;
end = buf + len;
while (p < end)
*p++ &= 0x7f;
/* Now let the PROM print it. */
prom_putstr(buf, len);
}
}
/*
* Our "interrupt" routine for input. This is called by
* the keyboard driver (dev/sun/kbd.c) at spltty.
*/
void
kd_cons_input(c)
int c;
{
struct kd_softc *kd = &kd_softc;
struct tty *tp;
/* XXX: Make sure the device is open. */
tp = kd->kd_tty;
if (tp == NULL)
return;
if ((tp->t_state & TS_ISOPEN) == 0)
return;
(*linesw[tp->t_line].l_rint)(c, tp);
}
void
cons_attach_input(cc)
struct cons_channel *cc;
{
struct kd_softc *kd = &kd_softc;
kd->kd_in = cc;
cc->cc_upstream = kd_cons_input;
}
/*
* Default PROM-based console input stream
* Since the PROM does not notify us when data is available on the
* input channel these functions periodically poll the PROM.
*/
static int kd_rom_iopen __P((struct cons_channel *));
static int kd_rom_iclose __P((struct cons_channel *));
static void kd_rom_intr __P((void *));
static struct cons_channel prom_cons_channel;
int
kd_rom_iopen(cc)
struct cons_channel *cc;
{
/* Poll for ROM input 4 times per second */
callout_reset(&cc->cc_callout, hz / 4, kd_rom_intr, cc);
return (0);
}
int
kd_rom_iclose(cc)
struct cons_channel *cc;
{
callout_stop(&cc->cc_callout);
return (0);
}
/*
* "Interrupt" routine for input through ROM vectors
*/
void
kd_rom_intr(arg)
void *arg;
{
struct cons_channel *cc = arg;
int s, c;
/* Re-schedule */
callout_reset(&cc->cc_callout, hz / 4, kd_rom_intr, cc);
s = spltty();
while ((c = prom_peekchar()) >= 0)
(*cc->cc_upstream)(c);
splx(s);
}
/*****************************************************************/
int prom_stdin_node;
int prom_stdout_node;
char prom_stdin_args[16];
char prom_stdout_args[16];
extern void prom_cnprobe __P((struct consdev *));
static void prom_cninit __P((struct consdev *));
static int prom_cngetc __P((dev_t));
static void prom_cnputc __P((dev_t, int));
extern void prom_cnpollc __P((dev_t, int));
/*
* The console is set to this one initially,
* which lets us use the PROM until consinit()
* is called to select a real console.
*/
struct consdev consdev_prom = {
prom_cnprobe,
prom_cninit,
prom_cngetc,
prom_cnputc,
prom_cnpollc,
NULL,
};
/*
* The console table pointer is statically initialized
* to point to the PROM table, so that early calls to printf will work.
*/
struct consdev *cn_tab = &consdev_prom;
void
prom_cnprobe(cn)
struct consdev *cn;
{
}
static void
prom_cninit(cn)
struct consdev *cn;
{
}
void
prom_cnpollc(dev, on)
dev_t dev;
int on;
{
if (on) {
/* Entering debugger. */
#if NFB > 0
fb_unblank();
#endif
} else {
/* Resuming kernel. */
}
}
/*
* PROM console input putchar.
*/
static int
prom_cngetc(dev)
dev_t dev;
{
int s, c;
s = splhigh();
c = prom_getchar();
splx(s);
return (c);
}
/*
* PROM console output putchar.
*/
static void
prom_cnputc(dev, c)
dev_t dev;
int c;
{
prom_putchar(c);
}
/*****************************************************************/
static void prom_get_device_args __P((const char *, char *, unsigned int));
void
prom_get_device_args(prop, args, sz)
const char *prop;
char *args;
unsigned int sz;
{
char *cp, buffer[128];
cp = getpropstringA(findroot(), (char *)prop, buffer, sizeof buffer);
/*
* Extract device-specific arguments from a PROM device path (if any)
*/
cp = buffer + strlen(buffer);
while (cp >= buffer) {
if (*cp == ':') {
strncpy(args, cp+1, sz);
break;
}
cp--;
}
}
/*
*
*/
void
consinit()
{
int inSource, outSink;
switch (prom_version()) {
case PROM_OLDMON:
case PROM_OBP_V0:
/* The stdio handles identify the device type */
inSource = prom_stdin();
outSink = prom_stdout();
break;
case PROM_OBP_V2:
case PROM_OBP_V3:
case PROM_OPENFIRM:
/* Save PROM arguments for device matching */
prom_get_device_args("stdin-path", prom_stdin_args,
sizeof(prom_stdin_args));
prom_get_device_args("stdout-path", prom_stdout_args,
sizeof(prom_stdout_args));
/*
* Translate the STDIO package instance (`ihandle') -- that
* the PROM has already opened for us -- to a device tree
* node (i.e. a `phandle').
*/
prom_stdin_node = prom_instance_to_package(prom_stdin());
if (prom_stdin_node == 0)
printf("consinit: cannot convert stdin ihandle\n");
prom_stdout_node = prom_instance_to_package(prom_stdout());
if (prom_stdout_node == 0) {
printf("consinit: cannot convert stdout ihandle\n");
break;
}
break;
default:
break;
}
/* Wire up /dev/console */
cn_tab->cn_dev = makedev(KDMAJOR, 0);
cn_tab->cn_pri = CN_INTERNAL;
/* Set up initial PROM input channel for /dev/console */
prom_cons_channel.cc_dev = NULL;
prom_cons_channel.cc_iopen = kd_rom_iopen;
prom_cons_channel.cc_iclose = kd_rom_iclose;
cons_attach_input(&prom_cons_channel);
#ifdef KGDB
zs_kgdb_init(); /* XXX */
#endif
}