/* $OpenBSD: dart.c,v 1.44 2005/10/13 19:48:34 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 #include #include #include #include #include #include #include #include #include #include /* enable/disable interrupts */ #include #include #include #include #include #include #include #include #include #define spldart() spltty() #ifdef DDB #include #endif #ifdef DEBUG int dart_debug = 1; #define dprintf(stuff) if (dart_debug) printf stuff #else #define dprintf(stuff) #endif #define NDARTPORTS 2 /* Number of ports */ struct dart_info { struct tty *tty; u_char dart_swflags; struct simplelock t_lock; }; struct dartsoftc { struct device sc_dev; union dartreg *dart_reg; union dart_pt_io *port_reg[NDARTPORTS]; struct dart_info sc_dart[NDARTPORTS]; struct intrhand sc_ih; }; 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 *); #if 0 void dartbreak(dev_t dev, int state); #endif /* * Lock strategy in that driver: * Use the tp->t_lock used by chario stuff as a lock * when modifying the chip's registers. * * Should be changed if driver crashes when powering * two lines. */ #define DART_PORT(dev) minor(dev) struct dart_sv_reg dart_sv_reg; /* 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(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) 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; } int dartmatch(parent, vcf, args) struct device *parent; void *vcf, *args; { struct confargs *ca = args; union dartreg *addr; /* Don't match if wrong cpu */ if (brdtyp != BRD_188) return (0); addr = (union dartreg *)ca->ca_paddr; if (badvaddr((vaddr_t)addr, 2)) { #ifdef DEBUG printf("==> dart: failed address check.\n"); #endif return (0); } return (1); } void dartattach(parent, self, aux) struct device *parent; struct device *self; void *aux; { struct dartsoftc *sc = (struct dartsoftc *)self; struct confargs *ca = aux; union dartreg *addr; /* pointer to DUART regs */ union dart_pt_io *ptaddr; /* pointer to port regs */ int port; /* port index */ if (ca->ca_ipl < 0) ca->ca_ipl = IPL_TTY; /* set up dual port memory and registers and init*/ sc->dart_reg = (union dartreg *)ca->ca_paddr; ptaddr = (union dart_pt_io *)ca->ca_paddr; sc->port_reg[A_PORT] = ptaddr; ptaddr++; sc->port_reg[B_PORT] = ptaddr; sc->sc_dart[A_PORT].tty = NULL; sc->sc_dart[B_PORT].tty = NULL; addr = sc->dart_reg; /* save standard initialization */ dart_sv_reg.sv_mr1[A_PORT] = PARDIS | RXRTS | CL8; dart_sv_reg.sv_mr2[A_PORT] = /* TXCTS | */ SB1; dart_sv_reg.sv_csr[A_PORT] = BD9600; dart_sv_reg.sv_cr[A_PORT] = TXEN | RXEN; dart_sv_reg.sv_mr1[B_PORT] = PARDIS | RXRTS | CL8; dart_sv_reg.sv_mr2[B_PORT] = /* TXCTS | */ SB1; dart_sv_reg.sv_csr[B_PORT] = BD9600; dart_sv_reg.sv_cr[B_PORT] = TXEN | RXEN; dart_sv_reg.sv_acr = BDSET2 | CCLK16 | IPDCDIB | IPDCDIA; /* Start out with Tx and RX interrupts disabled */ /* Enable input port change interrupt */ dart_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"); dprintf(("\ndartattach: resetting port A\n")); /* reset port a */ addr->write.wr_cra = RXRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_cra = TXRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_cra = ERRRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_cra = BRKINTRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_cra = MRRESET | TXDIS | RXDIS; dprintf(("dartattach: resetting port B\n")); /* reset port b */ addr->write.wr_crb = RXRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_crb = TXRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_crb = ERRRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_crb = BRKINTRESET | TXDIS | RXDIS; DELAY_CR; addr->write.wr_crb = MRRESET | TXDIS | RXDIS; DELAY_CR; /* initialize ports */ for (port = 0, ptaddr = (union dart_pt_io *)addr; port < MAXPORTS; port++, ptaddr++) { dprintf(("dartattach: init port %c\n", 'A' + port)); ptaddr->write.wr_mr = dart_sv_reg.sv_mr1[port]; ptaddr->write.wr_mr = dart_sv_reg.sv_mr2[port]; ptaddr->write.wr_csr = dart_sv_reg.sv_csr[port]; ptaddr->write.wr_cr = dart_sv_reg.sv_cr [port]; } dprintf(("dartattach: init common regs\n")); /* initialize common register of a DUART */ addr->write.wr_oprset = OPDTRA | OPRTSA | OPDTRB | OPRTSB; addr->write.wr_ctur = SLCTIM>>8; addr->write.wr_ctlr = SLCTIM & 0xFF; addr->write.wr_acr = dart_sv_reg.sv_acr; addr->write.wr_imr = dart_sv_reg.sv_imr; addr->write.wr_opcr = OPSET; addr->write.wr_ivr = SYSCON_VECT + SYSCV_SCC; /* hard coded vector */ /* 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"); } /* * To be called at spltty - tty already locked. */ void dartstart(tp) struct tty *tp; { dev_t dev; struct dartsoftc *sc; int s; union dart_pt_io *ptaddr; union dartreg *addr; int port, tries; int c; dev = tp->t_dev; port = DART_PORT(dev); if (dart_cd.cd_ndevs == 0 || port >= NDARTPORTS) return; sc = (struct dartsoftc *) dart_cd.cd_devs[0]; addr = sc->dart_reg; ptaddr = sc->port_reg[port]; if ((tp->t_state & TS_ISOPEN) == 0) return; 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; } dprintf(("dartstart: dev(%d, %d)\n", major(dev), minor(dev))); if (port != CONS_PORT) dprintf(("dartstart: ptaddr = 0x%08x from uart at 0x%08x\n", ptaddr, addr)); 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 (ptaddr->read.rd_sr & TXRDY) break; if (tries == 0) { timeout_add(&tp->t_rstrt_to, 1); tp->t_state |= TS_TIMEOUT; break; } else { c = getc(&tp->t_outq); if (port != CONS_PORT) dprintf(("dartstart: writing char \"%c\" (0x%02x) to port %d\n", c & 0xff, c & 0xff, port)); ptaddr->write.wr_tb = c & 0xff; if (port != CONS_PORT) dprintf(("dartstart: enabling Tx int\n")); if (port == A_PORT) dart_sv_reg.sv_imr |= ITXRDYA; else dart_sv_reg.sv_imr |= ITXRDYB; addr->write.wr_imr = dart_sv_reg.sv_imr; } } tp->t_state &= ~TS_BUSY; bail: splx(s); } /* * To be called at spltty - tty already locked. */ int dartstop(tp, flag) 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_) \ if (flags & (_FLAG_)) \ { newflags |= ((_PORT_) == A_PORT) ? (_AFLAG_) : (_BFLAG_); \ flags &= ~(_FLAG_); } #define HOW2STR(_OP_) \ ((_OP_) == DMGET) ? "GET" : \ (((_OP_) == DMSET) ? "FORCE" : \ ((((_OP_) == DMBIS) ? "SET" : \ (((((_OP_) == DMBIC) ? "CLR" : "???")))))) #define FLAGSTRING \ "\20\1LE\2DTR\3RTS\4ST\5SR\6CTS\7CAR\10RNG\11DSR\12BRK" /* * To be called at spltty - tty already locked. * Returns status of carrier. */ int dartmctl (dev, flags, how) dev_t dev; int flags; int how; { union dartreg *addr; int port; unsigned int dcdstate; int newflags = 0; struct dart_info *dart; struct dartsoftc *sc; 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]; addr = sc->dart_reg; /* special case: set or clear break */ #if 0 if (flags & TIOCSBRK) { dartbreak(port, 1); flags &= ~TIOCSBRK; } if (flags & TIOCCBRK) { dartbreak(port, 0); flags &= ~TIOCCBRK; } #endif s = spltty(); HANDLE_FLAG(TIOCM_DTR, port, OPDTRA, OPDTRB); HANDLE_FLAG(TIOCM_RTS, port, OPRTSA, OPRTSB); #if 0 if (flags) { printf("dartmctl: currently only BRK, DTR and RTS supported\n"); printf("dartmctl: op=%s flags left = 0x%b\n", HOW2STR(how), flags, FLAGSTRING); panic("dartmctl"); } #endif dprintf(("dartmctl: action=%s flags=0x%x\n", HOW2STR(how), newflags)); switch (how) { case DMSET: addr->write.wr_oprset = newflags; addr->write.wr_oprreset = ~newflags; break; case DMBIS: addr->write.wr_oprset = newflags; break; case DMBIC: addr->write.wr_oprreset = newflags; break; case DMGET: panic("dartmctl: DMGET not supported (yet)"); break; } /* read DCD input */ /* input is inverted at port */ dcdstate = !(addr->read.rd_ip & ((port == A_PORT) ? IPDCDA : IPDCDB)); dprintf(("dartmctl: DCD is %s\n", dcdstate ? "up" : "down")); splx(s); return dcdstate; } #if 0 /* * To be called at spltty - tty already locked. */ void dartbreak(dev, state) dev_t dev; int state; { union dartreg *addr; union dart_pt_io *ptaddr; int port; struct dart_info *dart; struct dartsoftc *sc; dprintf(("dartbreak: break %s\n", (state == 1) ? "on" : "off")); port = DART_PORT(dev); sc = (struct dartsoftc *) dart_cd.cd_devs[0]; dart = &sc->sc_dart[port]; addr = sc->dart_reg; ptaddr = sc->port_reg[port]; if (state == 1) { /* the duart must be enabled with a dummy byte, to prevent the transmitter empty interrupt */ ptaddr->write.wr_cr = BRKSTART|TXEN; ptaddr->write.wr_tb = 0; } else { ptaddr->write.wr_cr = BRKSTOP; /* stop a break*/ } } #endif int dartioctl(dev, cmd, data, flag, p) 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; 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]; tp = dart->tty; if (!tp) 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: /* */ break; 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; } /* * To be called at spltty - tty already locked. */ int dartparam(tp, t) struct tty *tp; struct termios *t; { union dartreg *addr; union dart_pt_io *ptaddr; int flags; int port; int speeds; unsigned char mr1, mr2; struct dart_info *dart; struct dartsoftc *sc; dev_t dev; dev = tp->t_dev; dprintf(("dartparam: setting param for dev(%d, %d)\n", major(dev), minor(dev))); 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]; addr = sc->dart_reg; ptaddr = sc->port_reg[port]; 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 */ dprintf(("dartparam: disabling Tx and Rx int\n")); if (CONS_PORT == port) { dprintf(("dartparam: skipping console init\n")); } else { if (port == A_PORT) dart_sv_reg.sv_imr = dart_sv_reg.sv_imr & ~(ITXRDYA | IRXRDYA); else dart_sv_reg.sv_imr = dart_sv_reg.sv_imr & ~(ITXRDYB | IRXRDYB); addr->write.wr_imr = dart_sv_reg.sv_imr; /* hang up on zero baud rate */ if (tp->t_ispeed == 0) { dprintf(("dartparam: ispeed == 0 -> HUP\n")); dartmctl(dev, HUPCL, DMSET); return 0; } else { /* set baudrate */ speeds = dart_speed(tp->t_ispeed); dprintf(("dartparam: speed 0x%x, baudrate %d\n", speeds, tp->t_ispeed)); if (speeds == NOBAUD) speeds = dart_sv_reg.sv_csr[port]; ptaddr->write.wr_csr = speeds; dart_sv_reg.sv_csr[port] = speeds; dprintf(("dartparam: baudrate set param = %d\n", speeds)); } /* get saved mode registers and clear set up parameters */ mr1 = dart_sv_reg.sv_mr1[port]; mr1 &= ~(CLMASK | PARTYPEMASK | PARMODEMASK); mr2 = dart_sv_reg.sv_mr2[port]; mr2 &= ~SBMASK; /* set up character size */ if (flags & CS8) { mr1 |= CL8; dprintf(("dartparam: PASS8\n")); } else if (tp->t_ispeed == B134) { mr1 |= CL6; dprintf(("dartparam: CS6\n")); } else { mr1 |= CL7; dprintf(("dartparam: CS7\n")); } /* set up stop bits */ if (tp->t_ospeed == B110) { mr2 |= SB2; dprintf(("dartparam: two stop bits\n")); } else { mr2 |= SB1; dprintf(("dartparam: one stop bit\n")); } /* set up parity */ if (((flags & PARENB) != PARENB) && (flags & PARENB)) { mr1 |= PAREN; if (flags & PARODD) { mr1 |= ODDPAR; dprintf(("dartparam: odd parity\n")); } else { mr1 |= EVENPAR; dprintf(("dartparam: even parity\n")); } } else { mr1 |= PARDIS; dprintf(("dartparam: no parity\n")); } if ((dart_sv_reg.sv_mr1[port] != mr1) || (dart_sv_reg.sv_mr2[port] != mr2)) { /* write mode registers to duart */ ptaddr->write.wr_cr = MRRESET; ptaddr->write.wr_mr = mr1; ptaddr->write.wr_mr = mr2; /* save changed mode registers */ dart_sv_reg.sv_mr1[port] = mr1; dart_sv_reg.sv_mr2[port] = mr2; } } /* enable transmitter? */ if (tp->t_state & TS_BUSY) { dprintf(("dartparam: reenabling Tx int\n")); if (port == A_PORT) dart_sv_reg.sv_imr = dart_sv_reg.sv_imr | ITXRDYA; else dart_sv_reg.sv_imr = dart_sv_reg.sv_imr | ITXRDYB; addr->write.wr_imr = dart_sv_reg.sv_imr; } else { dprintf(("dartparam: not enabling Tx\n")); } /* re-enable the receiver */ dprintf(("dartparam: reenabling Rx int\n")); DELAY_CR; if (port == A_PORT) dart_sv_reg.sv_imr = dart_sv_reg.sv_imr | IRXRDYA; else dart_sv_reg.sv_imr = dart_sv_reg.sv_imr | IRXRDYB; addr->write.wr_imr = dart_sv_reg.sv_imr; return 0; } void dartmodemtrans(sc, ip, ipcr) struct dartsoftc *sc; unsigned int ip; unsigned int ipcr; { unsigned int dcdstate; struct tty *tp; int port; struct dart_info *dart; dprintf(("dartmodemtrans: ip=0x%x ipcr=0x%x\n", ip, ipcr)); /* 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) { dprintf(("dartmodemtrans: tp=0x%x new DCD state: %s\n", tp, dcdstate ? "UP" : "DOWN")); ttymodem(tp, dcdstate); } } int dartopen (dev, flag, mode, p) dev_t dev; int flag; int mode; struct proc *p; { int s, port; struct dart_info *dart; struct dartsoftc *sc; struct tty *tp; port = DART_PORT(dev); if (dart_cd.cd_ndevs == 0 || port >= NDARTPORTS) return (ENODEV); sc = (struct dartsoftc *) dart_cd.cd_devs[0]; /* the only one */ dart = &sc->sc_dart[port]; s = spltty(); if (dart->tty) { tp = dart->tty; } else { tp = dart->tty = ttymalloc(); simple_lock_init(&dart->t_lock); } simple_lock(&dart->t_lock); 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) { simple_unlock(&dart->t_lock); 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; simple_unlock(&dart->t_lock); splx(s); return ((*linesw[tp->t_line].l_open)(dev, tp)); } int dartclose (dev, flag, mode, p) dev_t dev; int flag; int mode; struct proc *p; { struct tty *tp; struct dart_info *dart; struct dartsoftc *sc; int port; 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]; tp = dart->tty; (*linesw[tp->t_line].l_close)(tp, flag); ttyclose(tp); return 0; } int dartread (dev, uio, flag) dev_t dev; struct uio *uio; int flag; { int port; struct tty *tp; struct dart_info *dart; struct dartsoftc *sc; 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]; tp = dart->tty; if (!tp) return ENXIO; return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); } int dartwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { int port; struct tty *tp; struct dart_info *dart; struct dartsoftc *sc; 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]; tp = dart->tty; if (!tp) return ENXIO; return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); } void dartrint(sc, port) struct dartsoftc *sc; int port; { union dartreg *addr; union dart_pt_io *ptaddr; struct tty *tp; unsigned char data, sr; struct dart_info *dart; dart = &sc->sc_dart[port]; addr = sc->dart_reg; /* read status reg */ ptaddr = sc->port_reg[port]; dprintf(("dartrint: Rx int port %d\n", port)); tp = dart->tty; dprintf(("dartrint: ptaddr = 0x%08x from uart at 0x%08x\n", ptaddr, addr)); while ((sr = ptaddr->read.rd_sr) & RXRDY) { dprintf(("dartrint: sr = 0x%08x\n", sr)); data = ptaddr->read.rd_rb; /* read data and reset receiver */ dprintf(("dartrint: read char \"%c\" (0x%02x) tp = 0x%x\n", data, data, tp)); if ((tp->t_state & (TS_ISOPEN|TS_WOPEN)) == 0 && CONS_PORT != port) { return; } if (sr & RBRK) { dprintf(("dartrint: BREAK detected\n")); /* data = tp->t_breakc; ttyinput(data, tp); */ /* clear break state */ ptaddr->write.wr_cr = BRKINTRESET; DELAY_CR; ptaddr->write.wr_cr = ERRRESET; #if defined(DDB) if (db_console != 0) { 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); dprintf(("dartrint: error received\n")); /* clear error state */ ptaddr->write.wr_cr = 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 } } } dprintf(("dartrint: ready\n")); } void dartxint(sc, port) struct dartsoftc *sc; int port; { struct tty *tp; struct dart_info *dart; union dartreg *addr; dart = &sc->sc_dart[port]; addr = sc->dart_reg; tp = dart->tty; simple_lock(&dart->t_lock); 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; dprintf(("dartxint: starting output\n")); dartstart(tp); if (tp->t_state & TS_BUSY) { dprintf(("dartxint: ready - Tx left enabled\n")); simple_unlock(&dart->t_lock); return; } } out: /* disable transmitter */ if (port == 0) dart_sv_reg.sv_imr = dart_sv_reg.sv_imr & ~ITXRDYA; else dart_sv_reg.sv_imr = dart_sv_reg.sv_imr & ~ITXRDYB; addr->write.wr_imr = dart_sv_reg.sv_imr; simple_unlock(&dart->t_lock); dprintf(("dartxint: ready - Tx disabled\n")); } int dartintr(arg) void *arg; { struct dartsoftc *sc = arg; unsigned char isr, imr; int port; union dartreg *addr; /* read interrupt status register and mask with imr */ addr = sc->dart_reg; isr = addr->read.rd_isr; imr = dart_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 = addr->read.rd_ip; unsigned int ipcr = addr->read.rd_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 */ } dprintf(("dartintr: interrupt from port %d, isr 0x%08x\n", port, isr)); if (isr & (IRXRDYA | IRXRDYB)) { dprintf(("dartintr: Rx interrupt\n")); dartrint(sc, port); } if (isr & (ITXRDYA | ITXRDYB)) { dprintf(("dartintr: Tx interrupt\n")); dartxint(sc, port); } if ((port == A_PORT && (isr & IBRKA)) || (port == B_PORT && (isr & IBRKB))) { union dart_pt_io *ptaddr = (union dart_pt_io *)addr + port; dprintf(("dartintr: clearing end of BREAK state\n")); ptaddr->write.wr_cr = BRKINTRESET; } dprintf(("dartintr: ready\n")); return 1; } /* * Console interface routines. Currently only dev 0 or 1 * supported. */ void dartcnprobe(cp) struct consdev *cp; { int maj; cp->cn_pri = CN_DEAD; if (brdtyp != BRD_188 || badaddr(DART_BASE, 2) != 0) 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, 0); cp->cn_pri = CN_NORMAL; } void dartcninit(cp) struct consdev *cp; { } void dartcnputc(dev, c) dev_t dev; int c; { union dartreg *addr; union dart_pt_io *ptaddr; int s; int port; port = DART_PORT(dev); addr = (union dartreg *) MVME188_DUART; #if 1 ptaddr = (union dart_pt_io *) addr + (port * 0x20); #else ptaddr = (union dart_pt_io *) addr + ((dev & 1) ? 1 : 0); #endif s = spltty(); /* Assume first port initialized if we get here. */ /* Assume the bug initializes the port */ /* inhibit interrupts on the chip */ addr->write.wr_imr = dart_sv_reg.sv_imr & ~ITXRDYA; /* make sure transmitter is enabled */ DELAY_CR; ptaddr->write.wr_cr = TXEN; while (!(ptaddr->read.rd_sr & TXRDY)) ; ptaddr->write.wr_tb = c; /* wait for transmitter to empty */ while (!(ptaddr->read.rd_sr & TXEMT)) ; /* restore the previous state */ addr->write.wr_imr = dart_sv_reg.sv_imr; DELAY_CR; ptaddr->write.wr_cr = dart_sv_reg.sv_cr[0]; splx(s); } int dartcngetc(dev) dev_t dev; { union dartreg *addr; /* pointer to DUART regs */ union dart_pt_io *ptaddr; /* pointer to port regs */ unsigned char sr; /* status reg of port a/b */ u_char c; /* received character */ int s; int port; port = DART_PORT(dev); s = spltty(); addr = (union dartreg *) DART_BASE; #if 1 ptaddr = (union dart_pt_io *) addr + (port * 0x20); #else ptaddr = (union dart_pt_io *) addr + ((dev & 1) ? 1 : 0); #endif /* enable receiver */ ptaddr->write.wr_cr = RXEN; for (;;) { /* read status reg */ sr = ptaddr->read.rd_sr; /* receiver interrupt handler*/ if (sr & RXRDY) { /* read character from port */ c = ptaddr->read.rd_rb; /* check break condition */ if (sr & RBRK) { /* clear break state */ ptaddr->write.wr_cr = BRKINTRESET; DELAY_CR; ptaddr->write.wr_cr = ERRRESET; break; } if (sr & (FRERR | PERR | ROVRN)) { /* clear error state */ ptaddr->write.wr_cr = ERRRESET; DELAY_CR; ptaddr->write.wr_cr = BRKINTRESET; } else { break; } } } splx(s); return (int)c; }