b59236cece
time_pps_fetch() to be used in blocking mode. Also, don't init the pps api for system devices (consoles) that provide a custom attach routine. The device may actually be a keyboard or other non- tty device. If it wants to do pps processing (unlikely) it must handle everything for itself. (In reality, only a sun keyboard uses a custom attach routine, and it doesn't make a good pps device.)
417 lines
9.1 KiB
C
417 lines
9.1 KiB
C
/*-
|
|
* Copyright (c) 2003 Marcel Moolenaar
|
|
* 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 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/cons.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/interrupt.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/reboot.h>
|
|
#include <machine/bus.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/tty.h>
|
|
#include <machine/resource.h>
|
|
#include <machine/stdarg.h>
|
|
|
|
#include <dev/uart/uart.h>
|
|
#include <dev/uart/uart_bus.h>
|
|
#include <dev/uart/uart_cpu.h>
|
|
|
|
#include "uart_if.h"
|
|
|
|
static cn_probe_t uart_cnprobe;
|
|
static cn_init_t uart_cninit;
|
|
static cn_term_t uart_cnterm;
|
|
static cn_getc_t uart_cngetc;
|
|
static cn_putc_t uart_cnputc;
|
|
static cn_grab_t uart_cngrab;
|
|
static cn_ungrab_t uart_cnungrab;
|
|
|
|
CONSOLE_DRIVER(uart);
|
|
|
|
static struct uart_devinfo uart_console;
|
|
|
|
static void
|
|
uart_cnprobe(struct consdev *cp)
|
|
{
|
|
|
|
cp->cn_pri = CN_DEAD;
|
|
|
|
KASSERT(uart_console.cookie == NULL, ("foo"));
|
|
|
|
if (uart_cpu_getdev(UART_DEV_CONSOLE, &uart_console))
|
|
return;
|
|
|
|
if (uart_probe(&uart_console))
|
|
return;
|
|
|
|
strlcpy(cp->cn_name, uart_driver_name, sizeof(cp->cn_name));
|
|
cp->cn_pri = (boothowto & RB_SERIAL) ? CN_REMOTE : CN_NORMAL;
|
|
cp->cn_arg = &uart_console;
|
|
}
|
|
|
|
static void
|
|
uart_cninit(struct consdev *cp)
|
|
{
|
|
struct uart_devinfo *di;
|
|
|
|
/*
|
|
* Yedi trick: we need to be able to define cn_dev before we go
|
|
* single- or multi-user. The problem is that we don't know at
|
|
* this time what the device will be. Hence, we need to link from
|
|
* the uart_devinfo to the consdev that corresponds to it so that
|
|
* we can define cn_dev in uart_bus_attach() when we find the
|
|
* device during bus enumeration. That's when we'll know what the
|
|
* the unit number will be.
|
|
*/
|
|
di = cp->cn_arg;
|
|
KASSERT(di->cookie == NULL, ("foo"));
|
|
di->cookie = cp;
|
|
di->type = UART_DEV_CONSOLE;
|
|
uart_add_sysdev(di);
|
|
uart_init(di);
|
|
}
|
|
|
|
static void
|
|
uart_cnterm(struct consdev *cp)
|
|
{
|
|
|
|
uart_term(cp->cn_arg);
|
|
}
|
|
|
|
static void
|
|
uart_cngrab(struct consdev *cp)
|
|
{
|
|
|
|
uart_grab(cp->cn_arg);
|
|
}
|
|
|
|
static void
|
|
uart_cnungrab(struct consdev *cp)
|
|
{
|
|
|
|
uart_ungrab(cp->cn_arg);
|
|
}
|
|
|
|
static void
|
|
uart_cnputc(struct consdev *cp, int c)
|
|
{
|
|
|
|
uart_putc(cp->cn_arg, c);
|
|
}
|
|
|
|
static int
|
|
uart_cngetc(struct consdev *cp)
|
|
{
|
|
|
|
return (uart_poll(cp->cn_arg));
|
|
}
|
|
|
|
static int
|
|
uart_tty_open(struct tty *tp)
|
|
{
|
|
struct uart_softc *sc;
|
|
|
|
sc = tty_softc(tp);
|
|
|
|
if (sc == NULL || sc->sc_leaving)
|
|
return (ENXIO);
|
|
|
|
sc->sc_opened = 1;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
uart_tty_close(struct tty *tp)
|
|
{
|
|
struct uart_softc *sc;
|
|
|
|
sc = tty_softc(tp);
|
|
if (sc == NULL || sc->sc_leaving || !sc->sc_opened)
|
|
return;
|
|
|
|
if (sc->sc_hwiflow)
|
|
UART_IOCTL(sc, UART_IOCTL_IFLOW, 0);
|
|
if (sc->sc_hwoflow)
|
|
UART_IOCTL(sc, UART_IOCTL_OFLOW, 0);
|
|
if (sc->sc_sysdev == NULL)
|
|
UART_SETSIG(sc, SER_DDTR | SER_DRTS);
|
|
|
|
wakeup(sc);
|
|
sc->sc_opened = 0;
|
|
return;
|
|
}
|
|
|
|
static void
|
|
uart_tty_outwakeup(struct tty *tp)
|
|
{
|
|
struct uart_softc *sc;
|
|
|
|
sc = tty_softc(tp);
|
|
if (sc == NULL || sc->sc_leaving)
|
|
return;
|
|
|
|
if (sc->sc_txbusy)
|
|
return;
|
|
|
|
/*
|
|
* Respect RTS/CTS (output) flow control if enabled and not already
|
|
* handled by hardware.
|
|
*/
|
|
if ((tp->t_termios.c_cflag & CCTS_OFLOW) && !sc->sc_hwoflow &&
|
|
!(sc->sc_hwsig & SER_CTS))
|
|
return;
|
|
|
|
sc->sc_txdatasz = ttydisc_getc(tp, sc->sc_txbuf, sc->sc_txfifosz);
|
|
if (sc->sc_txdatasz != 0)
|
|
UART_TRANSMIT(sc);
|
|
}
|
|
|
|
static void
|
|
uart_tty_inwakeup(struct tty *tp)
|
|
{
|
|
struct uart_softc *sc;
|
|
|
|
sc = tty_softc(tp);
|
|
if (sc == NULL || sc->sc_leaving)
|
|
return;
|
|
|
|
if (sc->sc_isquelch) {
|
|
if ((tp->t_termios.c_cflag & CRTS_IFLOW) && !sc->sc_hwiflow)
|
|
UART_SETSIG(sc, SER_DRTS|SER_RTS);
|
|
sc->sc_isquelch = 0;
|
|
uart_sched_softih(sc, SER_INT_RXREADY);
|
|
}
|
|
}
|
|
|
|
static int
|
|
uart_tty_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
|
|
{
|
|
struct uart_softc *sc;
|
|
|
|
sc = tty_softc(tp);
|
|
|
|
switch (cmd) {
|
|
case TIOCSBRK:
|
|
UART_IOCTL(sc, UART_IOCTL_BREAK, 1);
|
|
return (0);
|
|
case TIOCCBRK:
|
|
UART_IOCTL(sc, UART_IOCTL_BREAK, 0);
|
|
return (0);
|
|
default:
|
|
return pps_ioctl(cmd, data, &sc->sc_pps);
|
|
}
|
|
}
|
|
|
|
static int
|
|
uart_tty_param(struct tty *tp, struct termios *t)
|
|
{
|
|
struct uart_softc *sc;
|
|
int databits, parity, stopbits;
|
|
|
|
sc = tty_softc(tp);
|
|
if (sc == NULL || sc->sc_leaving)
|
|
return (ENODEV);
|
|
if (t->c_ispeed != t->c_ospeed && t->c_ospeed != 0)
|
|
return (EINVAL);
|
|
if (t->c_ospeed == 0) {
|
|
UART_SETSIG(sc, SER_DDTR | SER_DRTS);
|
|
return (0);
|
|
}
|
|
switch (t->c_cflag & CSIZE) {
|
|
case CS5: databits = 5; break;
|
|
case CS6: databits = 6; break;
|
|
case CS7: databits = 7; break;
|
|
default: databits = 8; break;
|
|
}
|
|
stopbits = (t->c_cflag & CSTOPB) ? 2 : 1;
|
|
if (t->c_cflag & PARENB)
|
|
parity = (t->c_cflag & PARODD) ? UART_PARITY_ODD
|
|
: UART_PARITY_EVEN;
|
|
else
|
|
parity = UART_PARITY_NONE;
|
|
if (UART_PARAM(sc, t->c_ospeed, databits, stopbits, parity) != 0)
|
|
return (EINVAL);
|
|
UART_SETSIG(sc, SER_DDTR | SER_DTR);
|
|
/* Set input flow control state. */
|
|
if (!sc->sc_hwiflow) {
|
|
if ((t->c_cflag & CRTS_IFLOW) && sc->sc_isquelch)
|
|
UART_SETSIG(sc, SER_DRTS);
|
|
else
|
|
UART_SETSIG(sc, SER_DRTS | SER_RTS);
|
|
} else
|
|
UART_IOCTL(sc, UART_IOCTL_IFLOW, (t->c_cflag & CRTS_IFLOW));
|
|
/* Set output flow control state. */
|
|
if (sc->sc_hwoflow)
|
|
UART_IOCTL(sc, UART_IOCTL_OFLOW, (t->c_cflag & CCTS_OFLOW));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
uart_tty_modem(struct tty *tp, int biton, int bitoff)
|
|
{
|
|
struct uart_softc *sc;
|
|
|
|
sc = tty_softc(tp);
|
|
if (biton != 0 || bitoff != 0)
|
|
UART_SETSIG(sc, SER_DELTA(bitoff|biton) | biton);
|
|
return (sc->sc_hwsig);
|
|
}
|
|
|
|
void
|
|
uart_tty_intr(void *arg)
|
|
{
|
|
struct uart_softc *sc = arg;
|
|
struct tty *tp;
|
|
int c, err = 0, pend, sig, xc;
|
|
|
|
if (sc->sc_leaving)
|
|
return;
|
|
|
|
pend = atomic_readandclear_32(&sc->sc_ttypend);
|
|
if (!(pend & SER_INT_MASK))
|
|
return;
|
|
|
|
tp = sc->sc_u.u_tty.tp;
|
|
tty_lock(tp);
|
|
|
|
if (pend & SER_INT_RXREADY) {
|
|
while (!uart_rx_empty(sc) && !sc->sc_isquelch) {
|
|
xc = uart_rx_peek(sc);
|
|
c = xc & 0xff;
|
|
if (xc & UART_STAT_FRAMERR)
|
|
err |= TRE_FRAMING;
|
|
if (xc & UART_STAT_OVERRUN)
|
|
err |= TRE_OVERRUN;
|
|
if (xc & UART_STAT_PARERR)
|
|
err |= TRE_PARITY;
|
|
if (ttydisc_rint(tp, c, err) != 0) {
|
|
sc->sc_isquelch = 1;
|
|
if ((tp->t_termios.c_cflag & CRTS_IFLOW) &&
|
|
!sc->sc_hwiflow)
|
|
UART_SETSIG(sc, SER_DRTS);
|
|
} else
|
|
uart_rx_next(sc);
|
|
}
|
|
}
|
|
|
|
if (pend & SER_INT_BREAK)
|
|
ttydisc_rint(tp, 0, TRE_BREAK);
|
|
|
|
if (pend & SER_INT_SIGCHG) {
|
|
sig = pend & SER_INT_SIGMASK;
|
|
if (sig & SER_DDCD)
|
|
ttydisc_modem(tp, sig & SER_DCD);
|
|
if (sig & SER_DCTS)
|
|
uart_tty_outwakeup(tp);
|
|
}
|
|
|
|
if (pend & SER_INT_TXIDLE)
|
|
uart_tty_outwakeup(tp);
|
|
ttydisc_rint_done(tp);
|
|
tty_unlock(tp);
|
|
}
|
|
|
|
static void
|
|
uart_tty_free(void *arg)
|
|
{
|
|
|
|
/*
|
|
* XXX: uart(4) could reuse the device unit number before it is
|
|
* being freed by the TTY layer. We should use this hook to free
|
|
* the device unit number, but unfortunately newbus does not
|
|
* seem to support such a construct.
|
|
*/
|
|
}
|
|
|
|
static struct ttydevsw uart_tty_class = {
|
|
.tsw_flags = TF_INITLOCK|TF_CALLOUT,
|
|
.tsw_open = uart_tty_open,
|
|
.tsw_close = uart_tty_close,
|
|
.tsw_outwakeup = uart_tty_outwakeup,
|
|
.tsw_inwakeup = uart_tty_inwakeup,
|
|
.tsw_ioctl = uart_tty_ioctl,
|
|
.tsw_param = uart_tty_param,
|
|
.tsw_modem = uart_tty_modem,
|
|
.tsw_free = uart_tty_free,
|
|
};
|
|
|
|
int
|
|
uart_tty_attach(struct uart_softc *sc)
|
|
{
|
|
struct tty *tp;
|
|
int unit;
|
|
|
|
sc->sc_u.u_tty.tp = tp = tty_alloc(&uart_tty_class, sc);
|
|
|
|
unit = device_get_unit(sc->sc_dev);
|
|
|
|
if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
|
|
sprintf(((struct consdev *)sc->sc_sysdev->cookie)->cn_name,
|
|
"ttyu%r", unit);
|
|
tty_init_console(tp, sc->sc_sysdev->baudrate);
|
|
}
|
|
|
|
swi_add(&tty_intr_event, uart_driver_name, uart_tty_intr, sc, SWI_TTY,
|
|
INTR_TYPE_TTY, &sc->sc_softih);
|
|
|
|
tty_makedev(tp, NULL, "u%r", unit);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
uart_tty_detach(struct uart_softc *sc)
|
|
{
|
|
struct tty *tp;
|
|
|
|
tp = sc->sc_u.u_tty.tp;
|
|
|
|
tty_lock(tp);
|
|
swi_remove(sc->sc_softih);
|
|
tty_rel_gone(tp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
struct mtx *
|
|
uart_tty_getlock(struct uart_softc *sc)
|
|
{
|
|
|
|
if (sc->sc_u.u_tty.tp != NULL)
|
|
return (tty_getlock(sc->sc_u.u_tty.tp));
|
|
else
|
|
return (NULL);
|
|
}
|