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|
/* $OpenBSD: dart.c,v 1.46 2006/04/15 22:32:42 miod Exp $ */
/*
* Mach Operating System
* Copyright (c) 1993-1991 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/conf.h>
#include <machine/cpu.h>
#include <machine/locore.h>
#include <dev/cons.h>
#include <machine/mvme188.h>
#include <mvme88k/dev/sysconreg.h>
#include <mvme88k/dev/dartreg.h>
#ifdef DDB
#include <ddb/db_var.h>
#endif
#define NDARTPORTS 2 /* Number of ports */
struct dart_info {
struct tty *tty;
u_char dart_swflags;
};
/* saved registers */
struct dart_sv_reg {
u_int8_t sv_mr1[NDARTPORTS];
u_int8_t sv_mr2[NDARTPORTS];
u_int8_t sv_csr[NDARTPORTS];
u_int8_t sv_cr[NDARTPORTS];
u_int8_t sv_imr;
};
struct dartsoftc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct intrhand sc_ih;
struct dart_sv_reg sc_sv_reg;
struct dart_info sc_dart[NDARTPORTS];
};
int dartmatch(struct device *parent, void *self, void *aux);
void dartattach(struct device *parent, struct device *self, void *aux);
struct cfattach dart_ca = {
sizeof(struct dartsoftc), dartmatch, dartattach
};
struct cfdriver dart_cd = {
NULL, "dart", DV_TTY
};
/* console is on the first port */
#define CONS_PORT A_PORT
/* prototypes */
cons_decl(dart);
int dart_speed(int);
struct tty *darttty(dev_t);
void dartstart(struct tty *);
int dartmctl(dev_t, int, int);
int dartparam(struct tty *, struct termios *);
void dartmodemtrans(struct dartsoftc *, unsigned int, unsigned int);
void dartrint(struct dartsoftc *, int);
void dartxint(struct dartsoftc *, int);
int dartintr(void *);
/*
* DUART registers are mapped as the least-significant byte of 32-bit
* addresses. The following macros hide this.
*/
#define DART_SIZE 0x40
#define dart_read(sc, reg) \
bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, 3 + ((reg) << 2))
#define dart_write(sc, reg, val) \
bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, 3 + ((reg) << 2), (val))
#define DART_PORT(dev) minor(dev)
int
dartmatch(struct device *parent, void *cf, void *aux)
{
struct confargs *ca = aux;
bus_space_handle_t ioh;
int rc;
if (brdtyp != BRD_188)
return (0);
/*
* We do not accept empty locators here...
*/
if (ca->ca_paddr != DART_BASE)
return (0);
if (bus_space_map(ca->ca_iot, ca->ca_paddr, DART_SIZE, 0, &ioh) != 0)
return (0);
rc = badvaddr((vaddr_t)bus_space_vaddr(ca->ca_iot, ioh), 4);
bus_space_unmap(ca->ca_iot, ca->ca_paddr, DART_SIZE);
return (rc == 0);
}
void
dartattach(struct device *parent, struct device *self, void *aux)
{
struct dartsoftc *sc = (struct dartsoftc *)self;
struct confargs *ca = aux;
bus_space_handle_t ioh;
if (ca->ca_ipl < 0)
ca->ca_ipl = IPL_TTY;
sc->sc_iot = ca->ca_iot;
if (bus_space_map(sc->sc_iot, ca->ca_paddr, DART_SIZE, 0, &ioh) != 0) {
printf(": can't map registers!\n");
return;
}
sc->sc_ioh = ioh;
/* save standard initialization */
sc->sc_sv_reg.sv_mr1[A_PORT] = PARDIS | RXRTS | CL8;
sc->sc_sv_reg.sv_mr2[A_PORT] = /* TXCTS | */ SB1;
sc->sc_sv_reg.sv_csr[A_PORT] = BD9600;
sc->sc_sv_reg.sv_cr[A_PORT] = TXEN | RXEN;
sc->sc_sv_reg.sv_mr1[B_PORT] = PARDIS | RXRTS | CL8;
sc->sc_sv_reg.sv_mr2[B_PORT] = /* TXCTS | */ SB1;
sc->sc_sv_reg.sv_csr[B_PORT] = BD9600;
sc->sc_sv_reg.sv_cr[B_PORT] = TXEN | RXEN;
/* Start out with Tx and RX interrupts disabled */
/* Enable input port change interrupt */
sc->sc_sv_reg.sv_imr = IIPCHG;
/*
* Although we are still running using the BUG routines,
* this device will be elected as the console after
* autoconf.
* We do not even test since we know we are an MVME188 and
* console is always on the first port.
*/
printf(": console");
/* reset port a */
dart_write(sc, DART_CRA, RXRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRA, TXRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRA, ERRRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRA, BRKINTRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRA, MRRESET | TXDIS | RXDIS);
DELAY_CR;
/* reset port b */
dart_write(sc, DART_CRB, RXRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRB, TXRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRB, ERRRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRB, BRKINTRESET | TXDIS | RXDIS);
DELAY_CR;
dart_write(sc, DART_CRB, MRRESET | TXDIS | RXDIS);
DELAY_CR;
/* initialize ports */
dart_write(sc, DART_MR1A, sc->sc_sv_reg.sv_mr1[A_PORT]);
dart_write(sc, DART_MR2A, sc->sc_sv_reg.sv_mr2[A_PORT]);
dart_write(sc, DART_CSRA, sc->sc_sv_reg.sv_csr[A_PORT]);
dart_write(sc, DART_CRA, sc->sc_sv_reg.sv_cr[A_PORT]);
dart_write(sc, DART_MR1B, sc->sc_sv_reg.sv_mr1[B_PORT]);
dart_write(sc, DART_MR2B, sc->sc_sv_reg.sv_mr2[B_PORT]);
dart_write(sc, DART_CSRB, sc->sc_sv_reg.sv_csr[B_PORT]);
dart_write(sc, DART_CRB, sc->sc_sv_reg.sv_cr[B_PORT]);
/* initialize common register of a DUART */
dart_write(sc, DART_OPRS, OPDTRA | OPRTSA | OPDTRB | OPRTSB);
dart_write(sc, DART_CTUR, SLCTIM >> 8);
dart_write(sc, DART_CTLR, SLCTIM & 0xff);
dart_write(sc, DART_ACR, BDSET2 | CCLK16 | IPDCDIB | IPDCDIA);
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr);
dart_write(sc, DART_OPCR, OPSET);
dart_write(sc, DART_IVR, SYSCON_VECT + SYSCV_SCC);
/* enable interrupts */
sc->sc_ih.ih_fn = dartintr;
sc->sc_ih.ih_arg = sc;
sc->sc_ih.ih_wantframe = 0;
sc->sc_ih.ih_ipl = ca->ca_ipl;
sysconintr_establish(SYSCV_SCC, &sc->sc_ih, self->dv_xname);
printf("\n");
}
/* speed tables */
const struct dart_s {
int kspeed;
int dspeed;
} dart_speeds[] = {
{ B0, 0 }, /* 0 baud, special HUP condition */
{ B50, NOBAUD }, /* 50 baud, not implemented */
{ B75, BD75 }, /* 75 baud */
{ B110, BD110 }, /* 110 baud */
{ B134, BD134 }, /* 134.5 baud */
{ B150, BD150 }, /* 150 baud */
{ B200, NOBAUD }, /* 200 baud, not implemented */
{ B300, BD300 }, /* 300 baud */
{ B600, BD600 }, /* 600 baud */
{ B1200, BD1200 }, /* 1200 baud */
{ B1800, BD1800 }, /* 1800 baud */
{ B2400, BD2400 }, /* 2400 baud */
{ B4800, BD4800 }, /* 4800 baud */
{ B9600, BD9600 }, /* 9600 baud */
{ B19200, BD19200 }, /* 19200 baud */
{ -1, NOBAUD }, /* anything more is uncivilized */
};
int
dart_speed(int speed)
{
const struct dart_s *ds;
for (ds = dart_speeds; ds->kspeed != -1; ds++)
if (ds->kspeed == speed)
return ds->dspeed;
return NOBAUD;
}
struct tty *
darttty(dev_t dev)
{
unsigned int port;
struct dartsoftc *sc;
port = DART_PORT(dev);
if (dart_cd.cd_ndevs == 0 || port >= NDARTPORTS)
return (NULL);
sc = (struct dartsoftc *)dart_cd.cd_devs[0];
return sc->sc_dart[port].tty;
}
void
dartstart(struct tty *tp)
{
struct dartsoftc *sc;
dev_t dev;
int s;
int port, tries;
int c;
bus_addr_t ptaddr;
dev = tp->t_dev;
port = DART_PORT(dev);
if (dart_cd.cd_ndevs == 0 || port >= NDARTPORTS)
return;
if ((tp->t_state & TS_ISOPEN) == 0)
return;
sc = (struct dartsoftc *)dart_cd.cd_devs[0];
ptaddr = port ? DART_B_BASE : DART_A_BASE;
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
goto bail;
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 bail;
}
tp->t_state |= TS_BUSY;
while (tp->t_outq.c_cc != 0) {
/* load transmitter until it is full */
for (tries = 10000; tries != 0; tries --)
if (dart_read(sc, ptaddr + DART_SRA) & TXRDY)
break;
if (tries == 0) {
timeout_add(&tp->t_rstrt_to, 1);
tp->t_state |= TS_TIMEOUT;
break;
} else {
c = getc(&tp->t_outq);
dart_write(sc, ptaddr + DART_TBA, c & 0xff);
if (port == A_PORT)
sc->sc_sv_reg.sv_imr |= ITXRDYA;
else
sc->sc_sv_reg.sv_imr |= ITXRDYB;
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr);
}
}
tp->t_state &= ~TS_BUSY;
bail:
splx(s);
}
int
dartstop(struct tty *tp, int flag)
{
int s;
s = spltty();
if (tp->t_state & TS_BUSY) {
if ((tp->t_state & TS_TTSTOP) == 0)
tp->t_state |= TS_FLUSH;
}
splx(s);
return 0;
}
#define HANDLE_FLAG(_FLAG_, _PORT_, _AFLAG_, _BFLAG_) \
do { \
if (flags & (_FLAG_)) { \
newflags |= ((_PORT_) == A_PORT) ? (_AFLAG_) : (_BFLAG_); \
flags &= ~(_FLAG_); \
} \
} while (0)
/*
* To be called at spltty - tty already locked.
* Returns status of carrier.
*/
int
dartmctl(dev_t dev, int flags, int how)
{
struct dartsoftc *sc;
int port;
int newflags = 0;
struct dart_info *dart;
int s;
port = DART_PORT(dev);
if (dart_cd.cd_ndevs == 0 || port >= NDARTPORTS)
return (ENODEV);
sc = (struct dartsoftc *) dart_cd.cd_devs[0];
dart = &sc->sc_dart[port];
s = spltty();
HANDLE_FLAG(TIOCM_DTR, port, OPDTRA, OPDTRB);
HANDLE_FLAG(TIOCM_RTS, port, OPRTSA, OPRTSB);
switch (how) {
case DMSET:
dart_write(sc, DART_OPRS, newflags);
dart_write(sc, DART_OPRR, ~newflags);
break;
case DMBIS:
dart_write(sc, DART_OPRS, newflags);
break;
case DMBIC:
dart_write(sc, DART_OPRR, newflags);
break;
case DMGET:
flags = 0; /* XXX not supported */
break;
}
splx(s);
return (flags);
}
int
dartioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
{
int error;
int port;
struct tty *tp;
struct dart_info *dart;
struct dartsoftc *sc;
sc = (struct dartsoftc *) dart_cd.cd_devs[0];
port = DART_PORT(dev);
dart = &sc->sc_dart[port];
tp = dart->tty;
if (tp == NULL)
return (ENXIO);
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);
switch (cmd) {
case TIOCSBRK:
case TIOCCBRK:
break;
case TIOCSDTR:
(void)dartmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIS);
break;
case TIOCCDTR:
(void)dartmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIC);
break;
case TIOCMSET:
(void)dartmctl(dev, *(int *) data, DMSET);
break;
case TIOCMBIS:
(void)dartmctl(dev, *(int *) data, DMBIS);
break;
case TIOCMBIC:
(void)dartmctl(dev, *(int *) data, DMBIC);
break;
case TIOCMGET:
*(int *)data = dartmctl(dev, 0, DMGET);
break;
case TIOCGFLAGS:
if (CONS_PORT == port)
dart->dart_swflags |= TIOCFLAG_SOFTCAR;
*(int *)data = dart->dart_swflags;
break;
case TIOCSFLAGS:
error = suser(p, 0);
if (error != 0)
return (EPERM);
dart->dart_swflags = *(int *)data;
if (CONS_PORT == port)
dart->dart_swflags |= TIOCFLAG_SOFTCAR;
dart->dart_swflags &= /* only allow valid flags */
(TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS);
break;
default:
return (ENOTTY);
}
return (0);
}
int
dartparam(struct tty *tp, struct termios *t)
{
int flags;
int port;
int speeds;
unsigned char mr1, mr2;
struct dart_info *dart;
struct dartsoftc *sc;
dev_t dev;
bus_addr_t ptaddr;
dev = tp->t_dev;
sc = (struct dartsoftc *)dart_cd.cd_devs[0];
port = DART_PORT(dev);
dart = &sc->sc_dart[port];
ptaddr = port ? DART_B_BASE : DART_A_BASE;
tp->t_ispeed = t->c_ispeed;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
flags = tp->t_flags;
/* Reset to make global changes*/
/* disable Tx and Rx */
if (CONS_PORT != port) {
if (port == A_PORT)
sc->sc_sv_reg.sv_imr &= ~(ITXRDYA | IRXRDYA);
else
sc->sc_sv_reg.sv_imr &= ~(ITXRDYB | IRXRDYB);
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr);
/* hang up on zero baud rate */
if (tp->t_ispeed == 0) {
dartmctl(dev, HUPCL, DMSET);
return (0);
} else {
/* set baudrate */
speeds = dart_speed(tp->t_ispeed);
if (speeds == NOBAUD)
speeds = sc->sc_sv_reg.sv_csr[port];
dart_write(sc, ptaddr + DART_CSRA, speeds);
sc->sc_sv_reg.sv_csr[port] = speeds;
}
/* get saved mode registers and clear set up parameters */
mr1 = sc->sc_sv_reg.sv_mr1[port];
mr1 &= ~(CLMASK | PARTYPEMASK | PARMODEMASK);
mr2 = sc->sc_sv_reg.sv_mr2[port];
mr2 &= ~SBMASK;
/* set up character size */
if (flags & CS8)
mr1 |= CL8;
else if (tp->t_ispeed == B134)
mr1 |= CL6;
else
mr1 |= CL7;
/* set up stop bits */
if (tp->t_ospeed == B110)
mr2 |= SB2;
else
mr2 |= SB1;
/* set up parity */
if (((flags & PARENB) != PARENB) &&
(flags & PARENB)) {
mr1 |= PAREN;
if (flags & PARODD)
mr1 |= ODDPAR;
else
mr1 |= EVENPAR;
} else
mr1 |= PARDIS;
if (sc->sc_sv_reg.sv_mr1[port] != mr1 ||
sc->sc_sv_reg.sv_mr2[port] != mr2) {
/* write mode registers to duart */
dart_write(sc, ptaddr + DART_CRA, MRRESET);
dart_write(sc, ptaddr + DART_MR1A, mr1);
dart_write(sc, ptaddr + DART_MR2A, mr2);
/* save changed mode registers */
sc->sc_sv_reg.sv_mr1[port] = mr1;
sc->sc_sv_reg.sv_mr2[port] = mr2;
}
}
/* enable transmitter? */
if (tp->t_state & TS_BUSY) {
if (port == A_PORT)
sc->sc_sv_reg.sv_imr |= ITXRDYA;
else
sc->sc_sv_reg.sv_imr |= ITXRDYB;
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr);
}
/* re-enable the receiver */
DELAY_CR;
if (port == A_PORT)
sc->sc_sv_reg.sv_imr |= IRXRDYA;
else
sc->sc_sv_reg.sv_imr |= IRXRDYB;
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr);
return (0);
}
void
dartmodemtrans(struct dartsoftc *sc, unsigned int ip, unsigned int ipcr)
{
unsigned int dcdstate;
struct tty *tp;
int port;
struct dart_info *dart;
/* input is inverted at port!!! */
if (ipcr & IPCRDCDA) {
port = A_PORT;
dcdstate = !(ip & IPDCDA);
} else if (ipcr & IPCRDCDB) {
port = B_PORT;
dcdstate = !(ip & IPDCDB);
} else {
printf("dartmodemtrans: unknown transition ip=0x%x ipcr=0x%x\n",
ip, ipcr);
return;
}
dart = &sc->sc_dart[port];
tp = dart->tty;
if (tp != NULL)
ttymodem(tp, dcdstate);
}
int
dartopen(dev_t dev, int flag, int mode, struct proc *p)
{
int s, port;
struct dart_info *dart;
struct dartsoftc *sc;
struct tty *tp;
sc = (struct dartsoftc *) dart_cd.cd_devs[0]; /* the only one */
port = DART_PORT(dev);
dart = &sc->sc_dart[port];
s = spltty();
if (dart->tty != NULL)
tp = dart->tty;
else
tp = dart->tty = ttymalloc();
tp->t_oproc = dartstart;
tp->t_param = dartparam;
tp->t_dev = dev;
if ((tp->t_state & TS_ISOPEN) == 0) {
ttychars(tp);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = B9600;
dartparam(tp, &tp->t_termios);
if (port == CONS_PORT) {
/* console is 8N1 */
tp->t_cflag = (CREAD | CS8 | HUPCL);
} else {
tp->t_cflag = TTYDEF_CFLAG;
}
ttsetwater(tp);
(void)dartmctl(dev, TIOCM_DTR | TIOCM_RTS, DMSET);
tp->t_state |= TS_CARR_ON;
} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
splx(s);
return (EBUSY);
}
/*
* Reset the tty pointer, as there could have been a dialout
* use of the tty with a dialin open waiting.
*/
tp->t_dev = dev;
splx(s);
return ((*linesw[tp->t_line].l_open)(dev, tp));
}
int
dartclose(dev_t dev, int flag, int mode, struct proc *p)
{
struct tty *tp;
struct dart_info *dart;
struct dartsoftc *sc;
int port;
sc = (struct dartsoftc *) dart_cd.cd_devs[0];
port = DART_PORT(dev);
dart = &sc->sc_dart[port];
tp = dart->tty;
(*linesw[tp->t_line].l_close)(tp, flag);
ttyclose(tp);
return (0);
}
int
dartread(dev_t dev, struct uio *uio, int flag)
{
int port;
struct tty *tp;
struct dart_info *dart;
struct dartsoftc *sc;
sc = (struct dartsoftc *) dart_cd.cd_devs[0];
port = DART_PORT(dev);
dart = &sc->sc_dart[port];
tp = dart->tty;
if (tp == NULL)
return (ENXIO);
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
int
dartwrite(dev_t dev, struct uio *uio, int flag)
{
int port;
struct tty *tp;
struct dart_info *dart;
struct dartsoftc *sc;
sc = (struct dartsoftc *)dart_cd.cd_devs[0];
port = DART_PORT(dev);
dart = &sc->sc_dart[port];
tp = dart->tty;
if (tp == NULL)
return (ENXIO);
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
void
dartrint(struct dartsoftc *sc, int port)
{
struct tty *tp;
unsigned char data, sr;
struct dart_info *dart;
bus_addr_t ptaddr;
dart = &sc->sc_dart[port];
ptaddr = port ? DART_B_BASE : DART_A_BASE;
tp = dart->tty;
/* read status reg */
while ((sr = dart_read(sc, ptaddr + DART_SRA)) & RXRDY) {
/* read data and reset receiver */
data = dart_read(sc, ptaddr + DART_RBA);
if ((tp->t_state & (TS_ISOPEN|TS_WOPEN)) == 0 &&
CONS_PORT != port) {
return;
}
if (sr & RBRK) {
/* clear break state */
dart_write(sc, ptaddr + DART_CRA, BRKINTRESET);
DELAY_CR;
dart_write(sc, ptaddr + DART_CRA, ERRRESET);
#if defined(DDB)
if (db_console != 0 && port == CONS_PORT)
Debugger();
#endif
} else {
if (sr & (FRERR|PERR|ROVRN)) { /* errors */
if (sr & ROVRN)
printf("dart0: receiver overrun port %c\n", 'A' + port);
if (sr & FRERR)
printf("dart0: framing error port %c\n", 'A' + port);
if (sr & PERR)
printf("dart0: parity error port %c\n", 'A' + port);
/* clear error state */
dart_write(sc, ptaddr + DART_CRA, ERRRESET);
} else {
/* no errors */
(*linesw[tp->t_line].l_rint)(data,tp);
#if 0
{
if (tp->t_ispeed == B134) /* CS6 */
data &= 077;
else if (tp->t_flags & CS8)
;
else
data &= 0177; /* CS7 */
ttyinput(data, tp);
}
#endif
}
}
}
}
void
dartxint(struct dartsoftc *sc, int port)
{
struct tty *tp;
struct dart_info *dart;
dart = &sc->sc_dart[port];
tp = dart->tty;
if ((tp->t_state & (TS_ISOPEN|TS_WOPEN))==0)
goto out;
if (tp->t_state & TS_FLUSH)
tp->t_state &= ~TS_FLUSH;
if (tp->t_state & TS_BUSY) {
tp->t_state &= ~TS_BUSY;
dartstart(tp);
if (tp->t_state & TS_BUSY) {
return;
}
}
out:
/* disable transmitter */
if (port == 0)
sc->sc_sv_reg.sv_imr &= ~ITXRDYA;
else
sc->sc_sv_reg.sv_imr &= ~ITXRDYB;
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr);
}
int
dartintr(void *arg)
{
struct dartsoftc *sc = arg;
unsigned char isr, imr;
int port;
/* read interrupt status register and mask with imr */
isr = dart_read(sc, DART_ISR);
imr = sc->sc_sv_reg.sv_imr;
if ((isr & imr) == 0) {
/*
* We got an interrupt on a disabled condition (such as TX
* ready change on a disabled port). This should not happen,
* but we have to claim the interrupt anyway.
*/
#ifdef DIAGNOSTIC
printf("dartintr: spurious interrupt, isr %x imr %x\n",
isr, imr);
#endif
return (1);
}
isr &= imr;
if (isr & IIPCHG) {
unsigned int ip, ipcr;
ip = dart_read(sc, DART_IP);
ipcr = dart_read(sc, DART_IPCR);
dartmodemtrans(sc, ip, ipcr);
return (1);
}
if (isr & (IRXRDYA | ITXRDYA))
port = 0;
else if (isr & (IRXRDYB | ITXRDYB))
port = 1;
else {
printf("dartintr: spurious interrupt, isr 0x%08x\n", isr);
return (1); /* claim it anyway */
}
if (isr & (IRXRDYA | IRXRDYB)) {
dartrint(sc, port);
}
if (isr & (ITXRDYA | ITXRDYB)) {
dartxint(sc, port);
}
if ((port == A_PORT && (isr & IBRKA)) ||
(port == B_PORT && (isr & IBRKB))) {
dart_write(sc, port ? DART_CRB : DART_CRA, BRKINTRESET);
}
return (1);
}
/*
* Console interface routines.
* Since we select the actual console after all devices are attached,
* we can safely pick the appropriate softc and use its information.
*/
void
dartcnprobe(struct consdev *cp)
{
int maj;
if (brdtyp != BRD_188 || badaddr(DART_BASE, 4) != 0)
return;
/* do not attach as console if dart has been disabled */
if (dart_cd.cd_ndevs == 0 || dart_cd.cd_devs[0] == NULL)
return;
/* locate the major number */
for (maj = 0; maj < nchrdev; maj++)
if (cdevsw[maj].d_open == dartopen)
break;
if (maj == nchrdev)
return;
cp->cn_dev = makedev(maj, CONS_PORT);
cp->cn_pri = CN_NORMAL;
}
void
dartcninit(cp)
struct consdev *cp;
{
}
void
dartcnputc(dev_t dev, int c)
{
struct dartsoftc *sc;
int s;
int port;
bus_addr_t ptaddr;
sc = (struct dartsoftc *)dart_cd.cd_devs[0];
port = DART_PORT(dev);
ptaddr = port ? DART_B_BASE : DART_A_BASE;
s = spltty();
/* inhibit interrupts on the chip */
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr & ~ITXRDYA);
/* make sure transmitter is enabled */
DELAY_CR;
dart_write(sc, ptaddr + DART_CRA, TXEN);
while ((dart_read(sc, ptaddr + DART_SRA) & TXRDY) == 0)
;
dart_write(sc, ptaddr + DART_TBA, c);
/* wait for transmitter to empty */
while ((dart_read(sc, ptaddr + DART_SRA) & TXEMT) == 0)
;
/* restore the previous state */
dart_write(sc, DART_IMR, sc->sc_sv_reg.sv_imr);
DELAY_CR;
dart_write(sc, ptaddr + DART_CRA, sc->sc_sv_reg.sv_cr[0]);
splx(s);
}
int
dartcngetc(dev_t dev)
{
struct dartsoftc *sc;
unsigned char sr; /* status reg of port a/b */
u_char c; /* received character */
int s;
int port;
bus_addr_t ptaddr;
sc = (struct dartsoftc *)dart_cd.cd_devs[0];
port = DART_PORT(dev);
ptaddr = port ? DART_B_BASE : DART_A_BASE;
s = spltty();
/* enable receiver */
dart_write(sc, ptaddr + DART_CRA, RXEN);
for (;;) {
/* read status reg */
sr = dart_read(sc, ptaddr + DART_SRA);
/* receiver interrupt handler*/
if (sr & RXRDY) {
/* read character from port */
c = dart_read(sc, ptaddr + DART_RBA);
/* check break condition */
if (sr & RBRK) {
/* clear break state */
dart_write(sc, ptaddr + DART_CRA, BRKINTRESET);
DELAY_CR;
dart_write(sc, ptaddr + DART_CRA, ERRRESET);
break;
}
if (sr & (FRERR | PERR | ROVRN)) {
/* clear error state */
dart_write(sc, ptaddr + DART_CRA, ERRRESET);
DELAY_CR;
dart_write(sc, ptaddr + DART_CRA, BRKINTRESET);
} else {
break;
}
}
}
splx(s);
return ((int)c);
}
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