/* $NetBSD: ttycons.c,v 1.20 2014/07/25 08:10:35 dholland Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
* 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.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ttycons.c,v 1.20 2014/07/25 08:10:35 dholland Exp $");
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kauth.h>
#include <sys/termios.h>
#include <sys/tty.h>
#include <dev/cons.h>
#include <machine/mainbus.h>
#include <machine/thunk.h>
static int ttycons_match(device_t, cfdata_t, void *);
static void ttycons_attach(device_t, device_t, void *);
void ttycons_consinit(void);
struct ttycons_softc {
device_t sc_dev;
struct tty *sc_tty;
void *sc_rd_sih;
void *sc_ctrlc_sih;
void *sc_ctrlz_sih;
u_char sc_buf[1024];
};
dev_type_cngetc(ttycons_cngetc);
dev_type_cnputc(ttycons_cnputc);
dev_type_cnpollc(ttycons_cnpollc);
static struct cnm_state ttycons_cnm_state;
struct consdev ttycons_consdev = {
.cn_getc = ttycons_cngetc,
.cn_putc = ttycons_cnputc,
.cn_pollc = ttycons_cnpollc,
.cn_dev = NODEV,
.cn_pri = CN_NORMAL,
};
CFATTACH_DECL_NEW(ttycons, sizeof(struct ttycons_softc),
ttycons_match, ttycons_attach, NULL, NULL);
extern struct cfdriver ttycons_cd;
dev_type_open(ttycons_open);
dev_type_close(ttycons_close);
dev_type_read(ttycons_read);
dev_type_write(ttycons_write);
dev_type_ioctl(ttycons_ioctl);
dev_type_stop(ttycons_stop);
dev_type_tty(ttycons_tty);
dev_type_poll(ttycons_poll);
const struct cdevsw ttycons_cdevsw = {
.d_open = ttycons_open,
.d_close = ttycons_close,
.d_read = ttycons_read,
.d_write = ttycons_write,
.d_ioctl = ttycons_ioctl,
.d_stop = ttycons_stop,
.d_tty = ttycons_tty,
.d_poll = ttycons_poll,
.d_kqfilter = ttykqfilter,
.d_flag = D_TTY,
.d_discard = nodiscard,
};
static void ttycons_start(struct tty *);
static int ttycons_param(struct tty *, struct termios *);
static int ttycons_intr(void *);
static void ttycons_softintr(void *);
static sigfunc_t ttycons_ctrlc;
static void ttycons_softctrlc(void *);
static sigfunc_t ttycons_ctrlz;
static void ttycons_softctrlz(void *);
static int
ttycons_match(device_t parent, cfdata_t match, void *opaque)
{
struct thunkbus_attach_args *taa = opaque;
if (taa->taa_type != THUNKBUS_TYPE_TTYCONS)
return 0;
return 1;
}
static void
ttycons_attach(device_t parent, device_t self, void *opaque)
{
struct ttycons_softc *sc = device_private(self);
int maj;
aprint_naive("\n");
aprint_normal(": console\n");
sc->sc_dev = self;
sc->sc_tty = tty_alloc();
tty_attach(sc->sc_tty);
sc->sc_tty->t_oproc = ttycons_start;
sc->sc_tty->t_param = ttycons_param;
sc->sc_tty->t_sc = sc;
maj = cdevsw_lookup_major(&ttycons_cdevsw);
cn_tab->cn_dev = makedev(maj, device_unit(self));
sc->sc_tty->t_dev = cn_tab->cn_dev;
sc->sc_rd_sih = softint_establish(SOFTINT_SERIAL,
ttycons_softintr, sc);
if (sc->sc_rd_sih == NULL)
panic("couldn't establish ttycons intr handler\n");
sc->sc_ctrlc_sih = softint_establish(SOFTINT_SERIAL,
ttycons_softctrlc, sc);
if (sc->sc_ctrlc_sih == NULL)
panic("couldn't establish ttycons ctrlc handler\n");
sc->sc_ctrlz_sih = softint_establish(SOFTINT_SERIAL,
ttycons_softctrlz, sc);
if (sc->sc_ctrlz_sih == NULL)
panic("couldn't establish ttycons ctrlz handler\n");
sigio_intr_establish(ttycons_intr, sc);
signal_intr_establish(SIGINT, ttycons_ctrlc);
signal_intr_establish(SIGTSTP, ttycons_ctrlz);
if (thunk_set_stdin_sigio(true) != 0)
panic("couldn't enable stdin async mode");
}
void
ttycons_consinit(void)
{
struct thunk_termios t;
thunk_tcgetattr(0, &t);
t.c_lflag &= ~(ECHO|ICANON);
t.c_cc[VTIME] = 0;
t.c_cc[VMIN] = 1;
thunk_tcsetattr(0, TCSANOW, &t);
cn_tab = &ttycons_consdev;
cn_init_magic(&ttycons_cnm_state);
cn_set_magic("\047\001");
}
int
ttycons_cngetc(dev_t dev)
{
return thunk_getchar();
}
void
ttycons_cnputc(dev_t dev, int c)
{
thunk_putchar(c);
}
void
ttycons_cnpollc(dev_t dev, int on)
{
}
int
ttycons_open(dev_t dev, int flag, int mode, lwp_t *l)
{
struct ttycons_softc *sc;
struct tty *t;
sc = device_lookup_private(&ttycons_cd, minor(dev));
if (sc == NULL)
return ENXIO;
t = sc->sc_tty;
if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, t))
return EBUSY;
if ((t->t_state & TS_ISOPEN) == 0 && t->t_wopen == 0) {
t->t_dev = dev;
ttychars(t);
t->t_iflag = TTYDEF_IFLAG;
t->t_oflag = TTYDEF_OFLAG;
t->t_cflag = TTYDEF_CFLAG;
t->t_lflag = TTYDEF_LFLAG;
t->t_ispeed = t->t_ospeed = TTYDEF_SPEED;
ttycons_param(t, &t->t_termios);
ttsetwater(t);
}
t->t_state |= TS_CARR_ON;
return t->t_linesw->l_open(dev, t);
}
int
ttycons_close(dev_t dev, int flag, int mode, lwp_t *l)
{
struct ttycons_softc *sc;
struct tty *t;
sc = device_lookup_private(&ttycons_cd, minor(dev));
t = sc->sc_tty;
if (t == NULL)
return 0;
t->t_linesw->l_close(t, flag);
ttyclose(t);
return 0;
}
int
ttycons_read(dev_t dev, struct uio *uio, int flag)
{
struct ttycons_softc *sc;
struct tty *t;
sc = device_lookup_private(&ttycons_cd, minor(dev));
t = sc->sc_tty;
return t->t_linesw->l_read(t, uio, flag);
}
int
ttycons_write(dev_t dev, struct uio *uio, int flag)
{
struct ttycons_softc *sc;
struct tty *t;
sc = device_lookup_private(&ttycons_cd, minor(dev));
t = sc->sc_tty;
return t->t_linesw->l_write(t, uio, flag);
}
int
ttycons_poll(dev_t dev, int events, lwp_t *l)
{
struct ttycons_softc *sc;
struct tty *t;
sc = device_lookup_private(&ttycons_cd, minor(dev));
t = sc->sc_tty;
return t->t_linesw->l_poll(t, events, l);
}
struct tty *
ttycons_tty(dev_t dev)
{
struct ttycons_softc *sc;
sc = device_lookup_private(&ttycons_cd, minor(dev));
return sc->sc_tty;
}
int
ttycons_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l)
{
struct ttycons_softc *sc;
struct tty *t;
int error;
sc = device_lookup_private(&ttycons_cd, minor(dev));
t = sc->sc_tty;
error = t->t_linesw->l_ioctl(t, cmd, data, flag, l);
if (error != EPASSTHROUGH)
return error;
error = ttioctl(t, cmd, data, flag, l);
if (error != EPASSTHROUGH)
return error;
return EPASSTHROUGH;
}
static void
ttycons_start(struct tty *t)
{
struct ttycons_softc *sc = t->t_sc;
u_char *p = sc->sc_buf;
int s, len, brem;
s = spltty();
if (t->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) {
splx(s);
return;
}
t->t_state |= TS_BUSY;
splx(s);
brem = q_to_b(&t->t_outq, sc->sc_buf, sizeof(sc->sc_buf));
while (brem > 0) {
len = thunk_write(1, p, brem);
if (len > 0) {
p += len;
brem -= len;
}
}
s = spltty();
t->t_state &= ~TS_BUSY;
if (ttypull(t)) {
t->t_state |= TS_TIMEOUT;
callout_schedule(&t->t_rstrt_ch, 1);
}
splx(s);
}
void
ttycons_stop(struct tty *t, int flag)
{
}
static int
ttycons_param(struct tty *t, struct termios *c)
{
t->t_ispeed = c->c_ispeed;
t->t_ospeed = c->c_ospeed;
t->t_cflag = c->c_cflag;
return 0;
}
static int
ttycons_intr(void *priv)
{
struct ttycons_softc *sc = priv;
softint_schedule(sc->sc_rd_sih);
return 0;
}
static void
ttycons_softintr(void *priv)
{
struct ttycons_softc *sc = priv;
struct tty *t = sc->sc_tty;
unsigned char ch;
int c;
while ((c = thunk_pollchar()) >= 0) {
ch = (unsigned char)c;
cn_check_magic(t->t_dev, ch, ttycons_cnm_state);
t->t_linesw->l_rint(ch, t);
}
}
/*
* handle SIGINT signal from trap.c
*
* argument 'pc' and 'va' are not used.
*/
static void
ttycons_ctrlc(siginfo_t *info, vaddr_t from_userland, vaddr_t pc, vaddr_t va)
{
struct ttycons_softc *sc;
sc = device_lookup_private(&ttycons_cd, minor(cn_tab->cn_dev));
if (sc)
softint_schedule(sc->sc_ctrlc_sih);
}
static void
ttycons_softctrlc(void *priv)
{
struct ttycons_softc *sc = priv;
struct tty *t = sc->sc_tty;
unsigned char ch = 3; /* ETX */
cn_check_magic(t->t_dev, ch, ttycons_cnm_state);
t->t_linesw->l_rint(ch, t);
}
/*
* handle SIGTSTP signal from trap.c
*
* argument 'pc' and 'va' are not used.
*/
static void
ttycons_ctrlz(siginfo_t *info, vaddr_t from_userland, vaddr_t pc, vaddr_t va)
{
struct ttycons_softc *sc;
sc = device_lookup_private(&ttycons_cd, minor(cn_tab->cn_dev));
if (sc)
softint_schedule(sc->sc_ctrlz_sih);
}
static void
ttycons_softctrlz(void *priv)
{
struct ttycons_softc *sc = priv;
struct tty *t = sc->sc_tty;
unsigned char ch = 26; /* SUB */
cn_check_magic(t->t_dev, ch, ttycons_cnm_state);
t->t_linesw->l_rint(ch, t);
}