/* $OpenBSD: pcons.c,v 1.11 2007/06/29 04:32:39 deraadt Exp $ */
/* $NetBSD: pcons.c,v 1.7 2001/05/02 10:32:20 scw Exp $ */
/*-
* Copyright (c) 2000 Eduardo E. Horvath
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Default console driver. Uses the PROM or whatever
* driver(s) are appropriate.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/time.h>
#include <sys/syslog.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <machine/bsd_openprom.h>
#include <machine/conf.h>
#include <machine/cpu.h>
#include <machine/eeprom.h>
#include <machine/psl.h>
#include <dev/cons.h>
#include "wsdisplay.h"
#if NWSDISPLAY > 0
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#endif
struct pconssoftc {
struct device of_dev;
#if NWSDISPLAY > 0
int sc_wsdisplay;
u_int sc_nscreens;
#endif
struct tty *of_tty;
struct timeout sc_poll_to;
int of_flags;
};
/* flags: */
#define OFPOLL 1
#define OFBURSTLEN 128 /* max number of bytes to write in one chunk */
/* XXXXXXXX - this is in MI code in NetBSD */
/*
* Stuff to handle debugger magic key sequences.
*/
#define CNS_LEN 128
#define CNS_MAGIC_VAL(x) ((x)&0x1ff)
#define CNS_MAGIC_NEXT(x) (((x)>>9)&0x7f)
#define CNS_TERM 0x7f /* End of sequence */
typedef struct cnm_state {
int cnm_state;
u_short *cnm_magic;
} cnm_state_t;
#ifdef DDB
#include <ddb/db_var.h>
#define cn_trap() do { if (db_console) Debugger(); } while (0)
#else
#define cn_trap()
#endif
#define cn_isconsole(d) ((d) == cn_tab->cn_dev)
void cn_init_magic(cnm_state_t *cnm);
void cn_destroy_magic(cnm_state_t *cnm);
int cn_set_magic(char *magic);
int cn_get_magic(char *magic, int len);
/* This should be called for each byte read */
#ifndef cn_check_magic
#define cn_check_magic(d, k, s) \
do { \
if (cn_isconsole(d)) { \
int v = (s).cnm_magic[(s).cnm_state]; \
if ((k) == CNS_MAGIC_VAL(v)) { \
(s).cnm_state = CNS_MAGIC_NEXT(v); \
if ((s).cnm_state == CNS_TERM) { \
cn_trap(); \
(s).cnm_state = 0; \
} \
} else { \
(s).cnm_state = 0; \
} \
} \
} while (/* CONSTCOND */ 0)
#endif
/* Encode out-of-band events this way when passing to cn_check_magic() */
#define CNC_BREAK 0x100
/* XXXXXXXXXX - end of this part of cnmagic, more at the end of this file. */
#include <sparc64/dev/cons.h>
int pconsmatch(struct device *, void *, void *);
void pconsattach(struct device *, struct device *, void *);
struct cfattach pcons_ca = {
sizeof(struct pconssoftc), pconsmatch, pconsattach
};
struct cfdriver pcons_cd = {
NULL, "pcons", DV_TTY
};
extern struct cfdriver pcons_cd;
static struct cnm_state pcons_cnm_state;
static int pconsprobe(void);
static void pcons_wsdisplay_init(struct pconssoftc *);
extern struct consdev *cn_tab;
cons_decl(prom_);
int
pconsmatch(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct mainbus_attach_args *ma = aux;
/* Only attach if no other console has attached. */
return (strcmp("pcons", ma->ma_name) == 0 &&
cn_tab->cn_getc == prom_cngetc);
}
void pcons_poll(void *);
void
pconsattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pconssoftc *sc = (struct pconssoftc *) self;
#if NWSDISPLAY > 0
char buffer[128];
extern struct consdev wsdisplay_cons;
extern int wsdisplay_getc_dummy(dev_t);
#endif
printf("\n");
if (!pconsprobe())
return;
#if NWSDISPLAY > 0
/*
* Attach a dumb wsdisplay device if a wscons input driver has
* registered as the console, or is about to do so (usb keyboards).
*/
if (wsdisplay_cons.cn_getc != wsdisplay_getc_dummy)
sc->sc_wsdisplay = 1;
else {
if (OF_getprop(OF_instance_to_package(stdin), "compatible",
buffer, sizeof(buffer)) != -1 &&
strncmp("usb", buffer, 3) == 0)
sc->sc_wsdisplay = 1;
}
if (sc->sc_wsdisplay != 0) {
pcons_wsdisplay_init(sc);
return;
}
#endif
cn_init_magic(&pcons_cnm_state);
cn_set_magic("+++++");
timeout_set(&sc->sc_poll_to, pcons_poll, sc);
}
void pconsstart(struct tty *);
int pconsparam(struct tty *, struct termios *);
int
pconsopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct pconssoftc *sc;
int unit = minor(dev);
struct tty *tp;
if (unit >= pcons_cd.cd_ndevs)
return ENXIO;
sc = pcons_cd.cd_devs[unit];
if (!sc)
return ENXIO;
#if NWSDISPLAY > 0
if (sc->sc_wsdisplay != 0)
return ENXIO;
#endif
if (!(tp = sc->of_tty)) {
sc->of_tty = tp = ttymalloc();
}
tp->t_oproc = pconsstart;
tp->t_param = pconsparam;
tp->t_dev = dev;
cn_tab->cn_dev = dev;
if (!(tp->t_state & TS_ISOPEN)) {
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;
pconsparam(tp, &tp->t_termios);
ttsetwater(tp);
} else if ((tp->t_state & TS_XCLUDE) && suser(p, 0))
return EBUSY;
tp->t_state |= TS_CARR_ON;
if (!(sc->of_flags & OFPOLL)) {
sc->of_flags |= OFPOLL;
timeout_add(&sc->sc_poll_to, 1);
}
return (*linesw[tp->t_line].l_open)(dev, tp);
}
int
pconsclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
timeout_del(&sc->sc_poll_to);
sc->of_flags &= ~OFPOLL;
(*linesw[tp->t_line].l_close)(tp, flag);
ttyclose(tp);
return 0;
}
int
pconsread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
return (*linesw[tp->t_line].l_read)(tp, uio, flag);
}
int
pconswrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
return (*linesw[tp->t_line].l_write)(tp, uio, flag);
}
int
pconsioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
int error;
if ((error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p)) >= 0)
return error;
if ((error = ttioctl(tp, cmd, data, flag, p)) >= 0)
return error;
return ENOTTY;
}
struct tty *
pconstty(dev)
dev_t dev;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
return sc->of_tty;
}
int
pconsstop(tp, flag)
struct tty *tp;
int flag;
{
return 0;
}
void
pconsstart(tp)
struct tty *tp;
{
struct clist *cl;
int s, len;
u_char buf[OFBURSTLEN];
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
splx(s);
return;
}
tp->t_state |= TS_BUSY;
splx(s);
cl = &tp->t_outq;
len = q_to_b(cl, buf, OFBURSTLEN);
OF_write(stdout, buf, len);
s = spltty();
tp->t_state &= ~TS_BUSY;
if (cl->c_cc) {
tp->t_state |= TS_TIMEOUT;
timeout_add(&tp->t_rstrt_to, 1);
}
if (cl->c_cc <= tp->t_lowat) {
if (tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(cl);
}
selwakeup(&tp->t_wsel);
}
splx(s);
}
int
pconsparam(tp, t)
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;
}
void
pcons_poll(aux)
void *aux;
{
struct pconssoftc *sc = aux;
struct tty *tp = sc->of_tty;
char ch;
while (OF_read(stdin, &ch, 1) > 0) {
cn_check_magic(tp->t_dev, ch, pcons_cnm_state);
if (tp && (tp->t_state & TS_ISOPEN)) {
if (ch == '\b')
ch = '\177';
(*linesw[tp->t_line].l_rint)(ch, tp);
}
}
timeout_add(&sc->sc_poll_to, 1);
}
int
pconsprobe()
{
if (!stdin) stdin = OF_stdin();
if (!stdout) stdout = OF_stdout();
return (stdin && stdout);
}
void
pcons_cnpollc(dev, on)
dev_t dev;
int on;
{
struct pconssoftc *sc = NULL;
if (pcons_cd.cd_devs)
sc = pcons_cd.cd_devs[minor(dev)];
if (sc == NULL)
return;
if (on) {
if (sc->of_flags & OFPOLL)
timeout_del(&sc->sc_poll_to);
sc->of_flags &= ~OFPOLL;
} else {
/* Resuming kernel. */
if (!(sc->of_flags & OFPOLL)) {
sc->of_flags |= OFPOLL;
timeout_add(&sc->sc_poll_to, 1);
}
}
}
/* XXXXXXXX --- more cnmagic stuff. */
#define ENCODE_STATE(c, n) (short)(((c)&0x1ff)|(((n)&0x7f)<<9))
static unsigned short cn_magic[CNS_LEN];
/*
* Initialize a cnm_state_t.
*/
void
cn_init_magic(cnm_state_t *cnm)
{
cnm->cnm_state = 0;
cnm->cnm_magic = cn_magic;
}
/*
* Destroy a cnm_state_t.
*/
void
cn_destroy_magic(cnm_state_t *cnm)
{
cnm->cnm_state = 0;
cnm->cnm_magic = NULL;
}
/*
* Translate a magic string to a state
* machine table.
*/
int
cn_set_magic(char *magic)
{
unsigned int i, c, n;
unsigned short m[CNS_LEN];
for (i=0; i<CNS_LEN; i++) {
c = (*magic++)&0xff;
n = *magic ? i+1 : CNS_TERM;
switch (c) {
case 0:
/* End of string */
if (i == 0) {
/* empty string? */
cn_magic[0] = 0;
#ifdef DEBUG
printf("cn_set_magic(): empty!\n");
#endif
return (0);
}
do {
cn_magic[i] = m[i];
} while (i--);
return(0);
case 0x27:
/* Escape sequence */
c = (*magic++)&0xff;
n = *magic ? i+1 : CNS_TERM;
switch (c) {
case 0x27:
break;
case 0x01:
/* BREAK */
c = CNC_BREAK;
break;
case 0x02:
/* NUL */
c = 0;
break;
}
/* FALLTHROUGH */
default:
/* Transition to the next state. */
#ifdef DEBUG
if (!cold)
printf("mag %d %x:%x\n", i, c, n);
#endif
m[i] = ENCODE_STATE(c, n);
break;
}
}
return (EINVAL);
}
/*
* Translate a state machine table back to
* a magic string.
*/
int
cn_get_magic(char *magic, int maglen) {
unsigned int i, c;
for (i=0; i<CNS_LEN; i++) {
c = cn_magic[i];
/* Translate a character */
switch (CNS_MAGIC_VAL(c)) {
case CNC_BREAK:
*magic++ = 0x27;
*magic++ = 0x01;
break;
case 0:
*magic++ = 0x27;
*magic++ = 0x02;
break;
case 0x27:
*magic++ = 0x27;
*magic++ = 0x27;
break;
default:
*magic++ = (c&0x0ff);
break;
}
/* Now go to the next state */
i = CNS_MAGIC_NEXT(c);
if (i == CNS_TERM || i == 0) {
/* Either termination state or empty machine */
*magic++ = 0;
return (0);
}
}
return (EINVAL);
}
#if NWSDISPLAY > 0
int pcons_alloc_screen(void *, const struct wsscreen_descr *, void **,
int *, int *, long *);
void pcons_cursor(void *, int, int, int);
void pcons_free_screen(void *, void *);
int pcons_ioctl(void *, u_long, caddr_t, int, struct proc *);
int pcons_mapchar(void *, int, unsigned int *);
paddr_t pcons_mmap(void *, off_t, int);
void pcons_putchar(void *, int, int, u_int, long);
int pcons_show_screen(void *, void *, int, void (*)(void *, int, int),
void *);
struct wsdisplay_emulops pcons_emulops = {
NULL,
pcons_mapchar,
pcons_putchar
};
struct wsscreen_descr pcons_stdscreen = {
"dumb", 80, 34, &pcons_emulops, 12, 22, 0
};
const struct wsscreen_descr *pcons_scrlist[] = {
&pcons_stdscreen
};
struct wsscreen_list pcons_screenlist = {
1, pcons_scrlist
};
struct wsdisplay_accessops pcons_accessops = {
pcons_ioctl,
pcons_mmap,
pcons_alloc_screen,
pcons_free_screen,
pcons_show_screen
};
int
pcons_alloc_screen(void *v, const struct wsscreen_descr *typ, void **cookiep,
int *curxp, int *curyp, long *attrp)
{
struct pconssoftc *sc = v;
int *rowp, *colp;
int row, col;
if (sc->sc_nscreens > 0)
return (ENOMEM);
row = col = 0;
if (romgetcursoraddr(&rowp, &colp) == 0) {
if (rowp != NULL)
row = *rowp;
if (colp != NULL)
col = *colp;
}
*cookiep = v;
*attrp = 0;
*curxp = col;
*curyp = row;
sc->sc_nscreens++;
return (0);
}
void
pcons_free_screen(void *v, void *cookie)
{
struct pconssoftc *sc = v;
sc->sc_nscreens--;
}
int
pcons_ioctl(void *v, u_long cmd, caddr_t data, int flags, struct proc *p)
{
switch (cmd) {
case WSDISPLAYIO_GTYPE:
*(u_int *)data = WSDISPLAY_TYPE_UNKNOWN;
break;
default:
return (-1);
}
return (0);
}
paddr_t
pcons_mmap(void *v, off_t off, int prot)
{
return ((paddr_t)-1);
}
int
pcons_show_screen(void *v, void *cookie, int waitok,
void (*cb)(void *, int, int), void *arg)
{
return (0);
}
int
pcons_mapchar(void *v, int uc, unsigned int *idx)
{
if ((uc & 0xff) == uc) {
*idx = uc;
return (1);
} else {
*idx = ' ';
return (0);
}
}
void
pcons_putchar(void *v, int row, int col, u_int uc, long attr)
{
u_char buf[1];
int s;
buf[0] = (u_char)uc;
s = splhigh();
OF_write(stdout, &buf, 1);
splx(s);
}
void
pcons_wsdisplay_init(struct pconssoftc *sc)
{
struct wsemuldisplaydev_attach_args waa;
int *rowp, *colp;
int options, row, col;
row = col = 0;
if (romgetcursoraddr(&rowp, &colp) == 0) {
if (rowp != NULL)
row = *rowp;
if (colp != NULL)
col = *colp;
}
options = OF_finddevice("/options");
pcons_stdscreen.nrows = getpropint(options, "screen-#rows", 34);
pcons_stdscreen.ncols = getpropint(options, "screen-#columns", 80);
/*
* We claim console here, because we can only get there if stdin
* is a keyboard. However, the PROM could have been configured with
* stdin being a keyboard and stdout being a serial sink.
* But since this combination is not supported under OpenBSD at the
* moment, it is reasonably safe to attach a dumb display as console
* here.
*/
wsdisplay_cnattach(&pcons_stdscreen, sc, col, row, 0);
waa.console = 1;
waa.scrdata = &pcons_screenlist;
waa.accessops = &pcons_accessops;
waa.accesscookie = sc;
waa.defaultscreens = 1;
config_found((struct device *)sc, &waa, wsemuldisplaydevprint);
}
#endif