4.4BSD/usr/src/sys/luna68k/dev/sio.c
/*
* Copyright (c) 1992 OMRON Corporation.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* OMRON Corporation.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)sio.c 8.1 (Berkeley) 6/10/93
*/
/*
* sio.c -- NEC uPD7201A UART Device Driver
* remaked by A.Fujita, NOV-5-1992
*/
#include "sio.h"
#if NSIO > 0
#include "bmc.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <luna68k/dev/device.h>
#include <luna68k/dev/sioreg.h>
#include <luna68k/dev/siovar.h>
struct sio_portc *sio_port_assign();
struct sio_portc *sio_port_get();
int sioprobe();
int sioopen();
void siostart();
int sioparam();
int siointr();
struct driver siodriver = {
sioprobe, "sio",
};
struct sio_portc sio_portc[NPORT] = {
{ -1, -1, 0, (struct siodevice *) 0x51000000, (int (*)()) 0 },
{ -1, -1, 1, (struct siodevice *) 0x51000004, (int (*)()) 0 }
};
struct sio_softc sio_softc[NSIO];
int sio_init_done = 0;
int siosoftCAR;
int sio_active;
int sioconsole = -1;
int siodefaultrate = TTYDEF_SPEED;
int siomajor = 12;
struct tty sio_tty[NSIO];
struct speedtab siospeedtab[] = {
2400, WR4_BAUD24,
4800, WR4_BAUD48,
9600, WR4_BAUD96,
};
#define siounit(x) minor(x)
extern struct tty *constty;
#ifdef KGDB
/*
* Kernel GDB support
*/
#include <machine/remote-sl.h>
extern dev_t kgdb_dev;
extern int kgdb_rate;
extern int kgdb_debug_init;
#endif
/*
* probe routines
*/
sioprobe(hd)
register struct hp_device *hd;
{
int unit = hd->hp_unit;
register struct sio_softc *sc = &sio_softc[unit];
register struct sio_portc *pc;
if (sc->sc_pc != 0) {
pc = sc->sc_pc;
printf("sio%d: port %d, address 0x%x, intr 0x%x (console)\n",
pc->pc_unit, pc->pc_port, pc->pc_addr, pc->pc_intr);
return(1);
}
sc->sc_pc = pc = sio_port_assign(unit, siomajor, unit, siointr);
printf("sio%d: port %d, address 0x%x, intr 0x%x\n",
pc->pc_unit, pc->pc_port, pc->pc_addr, pc->pc_intr);
sio_active |= 1 << unit;
#ifdef KGDB
if (major(kgdb_dev) == siomajor) {
#ifdef notdef
if (sioconsole == siounit(kgdb_dev)) {
kgdb_dev = NODEV; /* can't debug over console port */
} else {
#endif
/*
* The following could potentially be replaced
* by the corresponding code in dcmcnprobe.
*/
if (kgdb_debug_init) {
printf("sio%d: ", siounit(kgdb_dev));
kgdb_connect(1);
} else
printf("sio%d: kgdb enabled\n", siounit(kgdb_dev));
#ifdef notdef
}
#endif
/* end could be replaced */
}
#endif
siosoftCAR |= 1 << unit;
return(1);
}
struct sio_portc *
sio_port_assign(port, major, unit, intr)
int port, major, unit;
int (*intr)();
{
register struct sio_portc *pc;
pc = &sio_portc[port];
pc->pc_major = major;
pc->pc_intr = intr;
pc->pc_unit = unit;
return(pc);
}
struct sio_portc *
sio_port_get(port)
int port;
{
register struct sio_portc *pc;
pc = &sio_portc[port];
return(pc);
}
int
sio_port_info()
{
printf("sio_port_info[sio.c]:\t{%d} major = %d, unit = %d, intr = 0x%x\n",
0, sio_portc[0].pc_major, sio_portc[0].pc_unit, sio_portc[0].pc_intr);
printf("sio_port_info[sio.c]:\t{%d} major = %d, unit = %d, intr = 0x%x\n",
1, sio_portc[1].pc_major, sio_portc[1].pc_unit, sio_portc[1].pc_intr);
}
/*
* entry routines
*/
/* ARGSUSED */
#ifdef __STDC__
sioopen(dev_t dev, int flag, int mode, struct proc *p)
#else
sioopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
#endif
{
register struct tty *tp;
register int unit;
int error = 0;
unit = siounit(dev);
if (unit >= NSIO || (sio_active & (1 << unit)) == 0)
return (ENXIO);
tp = &sio_tty[unit];
tp->t_oproc = siostart;
tp->t_param = sioparam;
tp->t_dev = dev;
if ((tp->t_state & TS_ISOPEN) == 0) {
tp->t_state |= TS_WOPEN;
ttychars(tp);
if (tp->t_ispeed == 0) {
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
/* tp->t_cflag = TTYDEF_CFLAG; */
tp->t_cflag = (CREAD | CS8 | HUPCL);
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = siodefaultrate;
}
sioparam(tp, &tp->t_termios);
ttsetwater(tp);
} else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0)
return (EBUSY);
(void) siomctl(dev, WR5_DTR | WR5_RTS, DMSET);
if ((siosoftCAR & (1 << unit)) || (siomctl(dev, 0, DMGET) & RR0_DCD))
tp->t_state |= TS_CARR_ON;
(void) spltty();
while ((flag&O_NONBLOCK) == 0 && (tp->t_cflag&CLOCAL) == 0 &&
(tp->t_state & TS_CARR_ON) == 0) {
tp->t_state |= TS_WOPEN;
if (error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH,
ttopen, 0))
break;
}
(void) spl0();
if (error == 0)
error = (*linesw[tp->t_line].l_open)(dev, tp);
return (error);
}
/*ARGSUSED*/
sioclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
register struct tty *tp;
register int unit;
unit = siounit(dev);
tp = &sio_tty[unit];
(*linesw[tp->t_line].l_close)(tp, flag);
(void) siomctl(dev, WR5_BREAK, DMBIS);
if (tp->t_cflag&HUPCL || tp->t_state&TS_WOPEN ||
(tp->t_state&TS_ISOPEN) == 0)
(void) siomctl(dev, 0, DMSET);
ttyclose(tp);
return (0);
}
sioread(dev, uio, flag)
dev_t dev;
struct uio *uio;
{
register struct tty *tp = &sio_tty[siounit(dev)];
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
siowrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
{
register int unit = siounit(dev);
register struct tty *tp = &sio_tty[unit];
if ((unit == sioconsole) && constty &&
(constty->t_state&(TS_CARR_ON|TS_ISOPEN))==(TS_CARR_ON|TS_ISOPEN))
tp = constty;
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
/*
* Stop output on a line.
*/
/*ARGSUSED*/
siostop(tp, flag)
register struct tty *tp;
{
register int s;
s = spltty();
if (tp->t_state & TS_BUSY) {
if ((tp->t_state&TS_TTSTOP)==0)
tp->t_state |= TS_FLUSH;
}
splx(s);
}
sioioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
register struct tty *tp;
register int unit = siounit(dev);
register int error;
tp = &sio_tty[unit];
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
return (error);
error = ttioctl(tp, cmd, data, flag);
if (error >= 0)
return (error);
switch (cmd) {
case TIOCSBRK:
(void) siomctl(dev, WR5_BREAK, DMBIS);
break;
case TIOCCBRK:
(void) siomctl(dev, WR5_BREAK, DMBIC);
break;
case TIOCSDTR:
(void) siomctl(dev, WR5_DTR | WR5_RTS, DMBIS);
break;
case TIOCCDTR:
(void) siomctl(dev, WR5_DTR | WR5_RTS, DMBIC);
break;
case TIOCMSET:
(void) siomctl(dev, *(int *)data, DMSET);
break;
case TIOCMBIS:
(void) siomctl(dev, *(int *)data, DMBIS);
break;
case TIOCMBIC:
(void) siomctl(dev, *(int *)data, DMBIC);
break;
case TIOCMGET:
*(int *)data = siomctl(dev, 0, DMGET);
break;
default:
return (ENOTTY);
}
return (0);
}
/*
*
*/
void
siostart(tp)
register struct tty *tp;
{
register struct siodevice *sio;
register int rr;
int s, unit, c;
unit = siounit(tp->t_dev);
sio = sio_softc[unit].sc_pc->pc_addr;
s = spltty();
if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
goto out;
if (tp->t_outq.c_cc <= tp->t_lowat) {
if (tp->t_state&TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup((caddr_t)&tp->t_outq);
}
selwakeup(&tp->t_wsel);
}
if (tp->t_outq.c_cc == 0)
goto out;
rr = siogetreg(sio);
if (rr & RR_TXRDY) {
c = getc(&tp->t_outq);
tp->t_state |= TS_BUSY;
sio->sio_data = c;
}
out:
splx(s);
}
sioparam(tp, t)
register struct tty *tp;
register struct termios *t;
{
int unit = siounit(tp->t_dev);
register struct siodevice *sio;
register cflag = t->c_cflag;
register u_char wr;
int ospeed = ttspeedtab(t->c_ospeed, siospeedtab);
sio = sio_softc[unit].sc_pc->pc_addr;
switch (cflag & CSIZE) {
case CS5:
case CS6:
case CS7:
case CS8:
break;
}
wr = ospeed;
if (cflag & PARENB) {
wr |= WR4_PARENAB;
if ((cflag&PARODD) == 0)
wr |= WR4_EPARITY;
}
if (cflag & CSTOPB)
wr |= WR4_STOP2; /* 2 stop bit */
else
wr |= WR4_STOP1; /* 1 stop bit */
(void) sioreg(sio, WR4, wr);
return (0);
}
siomctl()
{
return (0);
}
/*
* Interrupt handling
*/
void
_siointr()
{
register int port;
register struct sio_portc *pc;
for (port = 0; port < NPORT; port++) {
pc = &sio_portc[port];
if (pc->pc_major != -1)
(pc->pc_intr)(pc->pc_unit);
}
}
siointr(unit)
register int unit;
{
register struct siodevice *sio = sio_softc[unit].sc_pc->pc_addr;
register u_char code;
register struct tty *tp;
int s, rr;
tp = &sio_tty[unit];
start:
rr = siogetreg(sio);
if (rr & RR_RXRDY) {
if (rr & (RR_FRAMING | RR_OVERRUN | RR_PARITY)) {
sioeint(unit, rr, sio);
goto start;
}
code = sio->sio_data;
if ((tp->t_state & TS_ISOPEN) != 0)
(*linesw[tp->t_line].l_rint)(code, tp);
#ifdef KGDB
else {
if (code == FRAME_END &&
kgdb_dev == makedev(siomajor, unit))
kgdb_connect(0); /* trap into kgdb */
}
#endif
while ((rr = siogetreg(sio)) & RR_RXRDY) {
code = sio->sio_data;
if ((tp->t_state & TS_ISOPEN) != 0)
(*linesw[tp->t_line].l_rint)(code, tp);
#ifdef KGDB
else {
if (code == FRAME_END &&
kgdb_dev == makedev(siomajor, unit))
kgdb_connect(0); /* trap into kgdb */
}
#endif
}
}
if (rr & RR_TXRDY) {
sio->sio_cmd = WR0_RSTPEND;
tp->t_state &= ~(TS_BUSY|TS_FLUSH);
if (tp->t_line)
(*linesw[tp->t_line].l_start)(tp);
else
siostart(tp);
}
}
sioeint(unit, stat, sio)
register int unit, stat;
register struct siodevice *sio;
{
register struct tty *tp;
register int code;
tp = &sio_tty[unit];
code = sio->sio_data;
sio->sio_cmd = WR0_ERRRST;
if ((tp->t_state & TS_ISOPEN) == 0) {
#ifdef KGDB
/* we don't care about parity errors */
if (((stat & (RR_FRAMING|RR_PARITY)) == RR_PARITY) &&
kgdb_dev == makedev(siomajor, unit) && code == FRAME_END)
kgdb_connect(0); /* trap into kgdb */
#endif
return;
}
if (stat & RR_FRAMING)
code |= TTY_FE;
else if (stat & RR_PARITY)
code |= TTY_PE;
(*linesw[tp->t_line].l_rint)(code, tp);
}
/*
* Following are all routines needed for SIO to act as console
*/
#include <luna68k/luna68k/cons.h>
siocnprobe(cp)
register struct consdev *cp;
{
register int unit = 0;
/* locate the major number */
for (siomajor = 0; siomajor < nchrdev; siomajor++)
if (cdevsw[siomajor].d_open == sioopen)
break;
/* initialize required fields */
cp->cn_dev = makedev(siomajor, unit);
cp->cn_tp = &sio_tty[unit];
cp->cn_pri = CN_NORMAL;
}
siocninit(cp)
struct consdev *cp;
{
int unit = siounit(cp->cn_dev);
register struct sio_softc *sc = &sio_softc[unit];
sioinit((struct siodevice *) SIO_HARDADDR, siodefaultrate);
/* port assign */
sc->sc_pc = sio_port_assign(SIO_PORT, siomajor, unit, siointr);
sioconsole = unit;
sio_active |= 1 << unit;
siosoftCAR |= 1 << unit;
}
siocngetc(dev)
dev_t dev;
{
struct sio_softc *sc = &sio_softc[siounit(dev)];
struct sio_portc *pc = sc->sc_pc;
return(sio_imgetc(pc->pc_addr));
}
siocnputc(dev, c)
dev_t dev;
int c;
{
struct sio_softc *sc = &sio_softc[siounit(dev)];
struct sio_portc *pc = sc->sc_pc;
sio_imputc(pc->pc_addr, c);
}
/*
* sio raw-level routines
*/
sioinit(sio0, rate)
register struct siodevice *sio0;
register int rate;
{
register struct siodevice *sio1;
int s;
rate = ttspeedtab(rate, siospeedtab);
if (sio_init_done)
return;
sio1 = (struct siodevice *) ((u_long) sio0 + sizeof(struct siodevice));
s = splhigh();
sioreg(sio0, WR0, WR0_CHANRST); /* Channel-A Reset */
sioreg(sio0, WR2, (WR2_VEC86 | WR2_INTR_1)); /* Set CPU BUS Interface Mode */
sioreg(sio1, WR2, 0); /* Set Interrupt Vector */
sioreg(sio0, WR0, WR0_RSTINT); /* Reset E/S Interrupt */
sioreg(sio0, WR4, (rate | WR4_STOP1 | WR4_NPARITY)); /* Tx/Rx */
sioreg(sio0, WR3, (WR3_RX8BIT | WR3_RXENBL)); /* Rx */
sioreg(sio0, WR5, (WR5_TX8BIT | WR5_TXENBL)); /* Tx */
sioreg(sio0, WR0, WR0_RSTINT); /* Reset E/S Interrupt */
sioreg(sio0, WR1, (WR1_RXALLS | WR1_TXENBL));
sioreg(sio1, WR0, WR0_CHANRST); /* Channel-B Reset */
sioreg(sio1, WR0, WR0_RSTINT); /* Reset E/S Interrupt */
sioreg(sio1, WR4, (rate | WR4_STOP1 | WR4_NPARITY)); /* Tx/Rx */
sioreg(sio1, WR3, (WR3_RX8BIT | WR3_RXENBL)); /* Rx */
sioreg(sio1, WR5, (WR5_TX8BIT | WR5_TXENBL)); /* Tx */
sioreg(sio1, WR0, WR0_RSTINT); /* Reset E/S Interrupt */
sioreg(sio1, WR1, (WR1_RXALLS | WR1_TXENBL));
splx(s);
sio_init_done = 1;
}
sio_imgetc(sio)
register struct siodevice *sio;
{
register int rr0, rr1;
int c, s;
s = splhigh();
while (((rr0 = sioreg(sio, RR0, 0)) & RR0_RXAVAIL) == 0)
;
c = sio->sio_data;
sioreg(sio, WR0, WR0_RSTPEND);
splx(s);
return (c);
}
sio_imputc(sio, c)
register struct siodevice *sio;
int c;
{
register u_char code;
register int rr;
int s;
s = splhigh();
sioreg(sio, WR1, WR1_RXALLS);
do {
DELAY(1);
rr = siogetreg(sio);
} while (!(rr & RR_TXRDY));
code = (c & 0xFF);
sio->sio_data = code;
do {
DELAY(1);
rr = siogetreg(sio);
} while (!(rr & RR_TXRDY));
sioreg(sio, WR1, (WR1_RXALLS | WR1_TXENBL));
splx(s);
}
/*
* uPD7201A register operation
*/
int
siogetreg(sio)
register struct siodevice *sio;
{
register int rr = 0;
rr = sio->sio_stat;
rr <<= 8;
sio->sio_cmd = 1; /* Select RR1 */
rr |= sio->sio_stat;
return(rr);
}
int
sioreg(sio, reg, val)
register struct siodevice *sio;
register int reg, val;
{
if (isStatusReg(reg)) {
if (reg != 0)
sio->sio_cmd = reg;
val = sio->sio_stat;
} else {
if (reg != 0)
sio->sio_cmd = reg;
sio->sio_cmd = val;
}
return(val);
}
#endif