/* $NetBSD: mfc.c,v 1.8 1995/10/09 15:20:33 chopps Exp $ */ /* * Copyright (c) 1994 Michael L. Hitch * Copyright (c) 1982, 1990 The Regents of the University of California. * 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. * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mfcs.h" #ifndef SEROBUF_SIZE #define SEROBUF_SIZE 128 #endif #ifndef SERIBUF_SIZE #define SERIBUF_SIZE 1024 #endif #define splser() spl6() /* * 68581 DUART registers */ struct mfc_regs { volatile u_char du_mr1a; #define du_mr2a du_mr1a u_char pad0; volatile u_char du_csra; #define du_sra du_csra u_char pad2; volatile u_char du_cra; u_char pad4; volatile u_char du_tba; #define du_rba du_tba u_char pad6; volatile u_char du_acr; #define du_ipcr du_acr u_char pad8; volatile u_char du_imr; #define du_isr du_imr u_char pad10; volatile u_char du_ctur; #define du_cmsb du_ctur u_char pad12; volatile u_char du_ctlr; #define du_clsb du_ctlr u_char pad14; volatile u_char du_mr1b; #define du_mr2b du_mr1b u_char pad16; volatile u_char du_csrb; #define du_srb du_csrb u_char pad18; volatile u_char du_crb; u_char pad20; volatile u_char du_tbb; #define du_rbb du_tbb u_char pad22; volatile u_char du_ivr; u_char pad24; volatile u_char du_opcr; #define du_ip du_opcr u_char pad26; volatile u_char du_btst; #define du_strc du_btst u_char pad28; volatile u_char du_btrst; #define du_stpc du_btrst u_char pad30; }; /* * 68681 DUART serial port registers */ struct duart_regs { volatile u_char ch_mr1; #define ch_mr2 ch_mr1 u_char pad0; volatile u_char ch_csr; #define ch_sr ch_csr u_char pad1; volatile u_char ch_cr; u_char pad2; volatile u_char ch_tb; #define ch_rb ch_tb u_char pad3; }; struct mfc_softc { struct device sc_dev; struct isr sc_isr; struct mfc_regs *sc_regs; u_long clk_frq; u_short ct_val; u_char ct_usecnt; u_char imask; u_char mfc_iii; u_char last_ip; }; #if NMFCS > 0 struct mfcs_softc { struct device sc_dev; struct tty *sc_tty; struct duart_regs *sc_duart; struct mfc_regs *sc_regs; struct mfc_softc *sc_mfc; long flags; /* XXX */ #define CT_USED 1 /* CT in use */ u_short *rptr, *wptr, incnt, ovfl; u_short inbuf[SERIBUF_SIZE]; char *ptr, *end; char outbuf[SEROBUF_SIZE]; }; #endif #if NMFCP > 0 struct mfcp_softc { }; #endif struct mfc_args { struct zbus_args zargs; char *subdev; char unit; }; int mfcprint __P((void *auxp, char *)); void mfcattach __P((struct device *, struct device *, void *)); int mfcmatch __P((struct device *, struct cfdata *, void *)); #if NMFCS > 0 void mfcsattach __P((struct device *, struct device *, void *)); int mfcsmatch __P((struct device *, struct cfdata *, void *)); #endif #if NMFCP > 0 void mfcpattach __P((struct device *, struct device *, void *)); int mfcpmatch __P((struct device *, struct cfdata *, void *)); #endif int mfcintr __P((struct mfc_softc *)); void mfcsmint __P((register int unit)); struct cfdriver mfccd = { NULL, "mfc", (cfmatch_t) mfcmatch, mfcattach, DV_DULL, sizeof(struct mfc_softc), NULL, 0 }; #if NMFCS > 0 struct cfdriver mfcscd = { NULL, "mfcs", (cfmatch_t) mfcsmatch, mfcsattach, DV_TTY, sizeof(struct mfcs_softc), NULL, 0 }; #endif #if NMFCP > 0 struct cfdriver mfcpcd = { NULL, "mfcp", (cfmatch_t) mfcpmatch, mfcpattach, DV_DULL, sizeof(struct mfcp_softc), NULL, 0 }; #endif int mfcsstart(), mfcsparam(), mfcshwiflow(); int mfcs_active; int mfcsdefaultrate = 38400 /*TTYDEF_SPEED*/; int mfcsswflags[NMFCS]; #define SWFLAGS(dev) (mfcsswflags[dev & 31] | (((dev) & 0x80) == 0 ? TIOCFLAG_SOFTCAR : 0)) struct vbl_node mfcs_vbl_node[NMFCS]; #ifdef notyet /* * MultiFaceCard III, II+ (not supported yet), and * SerialMaster 500+ (not supported yet) * baud rate tables for BRG set 1 [not used yet] */ struct speedtab mfcs3speedtab1[] = { 0, 0, 100, 0x00, 220, 0x11, 600, 0x44, 1200, 0x55, 2400, 0x66, 4800, 0x88, 9600, 0x99, 19200, 0xbb, 115200, 0xcc, -1, -1 }; /* * MultiFaceCard II, I, and SerialMaster 500 * baud rate tables for BRG set 1 [not used yet] */ struct speedtab mfcs2speedtab1[] = { 0, 0, 50, 0x00, 110, 0x11, 300, 0x44, 600, 0x55, 1200, 0x66, 2400, 0x88, 4800, 0x99, 9600, 0xbb, 38400, 0xcc, -1, -1 }; #endif /* * MultiFaceCard III, II+ (not supported yet), and * SerialMaster 500+ (not supported yet) * baud rate tables for BRG set 2 */ struct speedtab mfcs3speedtab2[] = { 0, 0, 150, 0x00, 200, 0x11, 300, 0x33, 600, 0x44, 1200, 0x55, 2400, 0x66, 4800, 0x88, 9600, 0x99, 19200, 0xbb, 38400, 0xcc, -1, -1 }; /* * MultiFaceCard II, I, and SerialMaster 500 * baud rate tables for BRG set 2 */ struct speedtab mfcs2speedtab2[] = { 0, 0, 75, 0x00, 100, 0x11, 150, 0x33, 300, 0x44, 600, 0x55, 1200, 0x66, 2400, 0x88, 4800, 0x99, 9600, 0xbb, 19200, 0xcc, -1, -1 }; /* * if we are an bsc/Alf Data MultFaceCard (I, II, and III) */ int mfcmatch(pdp, cdp, auxp) struct device *pdp; struct cfdata *cdp; void *auxp; { struct zbus_args *zap; zap = auxp; if (zap->manid == 2092 && (zap->prodid == 16 || zap->prodid == 17 || zap->prodid == 18)) return(1); return(0); } void mfcattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { struct mfc_softc *scc; struct zbus_args *zap; struct mfc_args ma; int unit; struct mfc_regs *rp; zap = auxp; printf ("\n"); scc = (struct mfc_softc *)dp; unit = scc->sc_dev.dv_unit; scc->sc_regs = rp = zap->va; if (zap->prodid == 18) scc->mfc_iii = 3; scc->clk_frq = scc->mfc_iii ? 230400 : 115200; rp->du_opcr = 0x00; /* configure output port? */ rp->du_btrst = 0x0f; /* clear modem lines */ rp->du_ivr = 0; /* IVR */ rp->du_imr = 0; /* IMR */ rp->du_acr = 0xe0; /* baud rate generate set 2 */ rp->du_ctur = 0; rp->du_ctlr = 4; rp->du_csra = 0xcc; /* clock select = 38400 */ rp->du_cra = 0x10; /* reset mode register ptr */ rp->du_cra = 0x20; rp->du_cra = 0x30; rp->du_cra = 0x40; rp->du_mr1a = 0x93; /* MRA1 */ rp->du_mr2a = 0x17; /* MRA2 */ rp->du_csrb = 0xcc; /* clock select = 38400 */ rp->du_crb = 0x10; /* reset mode register ptr */ rp->du_crb = 0x20; rp->du_crb = 0x30; rp->du_crb = 0x40; rp->du_mr1b = 0x93; /* MRB1 */ rp->du_mr2b = 0x17; /* MRB2 */ rp->du_cra = 0x05; /* enable A Rx & Tx */ rp->du_crb = 0x05; /* enable B Rx & Tx */ scc->sc_isr.isr_intr = mfcintr; scc->sc_isr.isr_arg = scc; scc->sc_isr.isr_ipl = 6; add_isr(&scc->sc_isr); /* configure ports */ bcopy(zap, &ma.zargs, sizeof(struct zbus_args)); ma.subdev = "mfcs"; ma.unit = unit * 2; config_found(dp, &ma, mfcprint); ma.unit = unit * 2 + 1; config_found(dp, &ma, mfcprint); ma.subdev = "mfcp"; ma.unit = unit; config_found(dp, &ma, mfcprint); } /* * */ int mfcsmatch(pdp, cdp, auxp) struct device *pdp; struct cfdata *cdp; void *auxp; { struct mfc_args *ma; ma = auxp; if (strcmp(ma->subdev, "mfcs") == 0) return (1); return (0); } void mfcsattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { int unit; struct mfcs_softc *sc; struct mfc_softc *scc; struct mfc_args *ma; struct mfc_regs *rp; sc = (struct mfcs_softc *) dp; scc = (struct mfc_softc *) pdp; ma = auxp; if (dp) { printf (": input fifo %d output fifo %d\n", SERIBUF_SIZE, SEROBUF_SIZE); alloc_sicallback(); } unit = ma->unit; mfcs_active |= 1 << unit; sc->rptr = sc->wptr = sc->inbuf; sc->sc_mfc = scc; sc->sc_regs = rp = scc->sc_regs; sc->sc_duart = (struct duart_regs *) ((unit & 1) ? &rp->du_mr1b : &rp->du_mr1a); /* * should have only one vbl routine to handle all ports? */ mfcs_vbl_node[unit].function = (void (*) (void *)) mfcsmint; mfcs_vbl_node[unit].data = (void *) unit; add_vbl_function(&mfcs_vbl_node[unit], 1, (void *) unit); } /* * print diag if pnp is NULL else just extra */ int mfcprint(auxp, pnp) void *auxp; char *pnp; { if (pnp == NULL) return(UNCONF); return(QUIET); } int mfcsopen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { struct tty *tp; struct mfcs_softc *sc; int unit, error, s; error = 0; unit = dev & 0x1f; if (unit >= mfcscd.cd_ndevs || (mfcs_active & (1 << unit)) == 0) return (ENXIO); sc = mfcscd.cd_devs[unit]; s = spltty(); if (sc->sc_tty) tp = sc->sc_tty; else tp = sc->sc_tty = ttymalloc(); tp->t_oproc = (void (*) (struct tty *)) mfcsstart; tp->t_param = mfcsparam; tp->t_dev = dev; tp->t_hwiflow = mfcshwiflow; if ((tp->t_state & TS_ISOPEN) == 0) { tp->t_state |= TS_WOPEN; ttychars(tp); if (tp->t_ispeed == 0) { /* * only when cleared do we reset to defaults. */ tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_cflag = TTYDEF_CFLAG; tp->t_lflag = TTYDEF_LFLAG; tp->t_ispeed = tp->t_ospeed = mfcsdefaultrate; } /* * do these all the time */ if (mfcsswflags[unit] & TIOCFLAG_CLOCAL) tp->t_cflag |= CLOCAL; if (mfcsswflags[unit] & TIOCFLAG_CRTSCTS) tp->t_cflag |= CRTSCTS; if (mfcsswflags[unit] & TIOCFLAG_MDMBUF) tp->t_cflag |= MDMBUF; mfcsparam(tp, &tp->t_termios); ttsetwater(tp); (void)mfcsmctl(dev, TIOCM_DTR | TIOCM_RTS, DMSET); if ((SWFLAGS(dev) & TIOCFLAG_SOFTCAR) || (mfcsmctl(dev, 0, DMGET) & TIOCM_CD)) tp->t_state |= TS_CARR_ON; else tp->t_state &= ~TS_CARR_ON; } else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) { splx(s); return(EBUSY); } /* * if NONBLOCK requested, ignore carrier */ if (flag & O_NONBLOCK) goto done; /* * block waiting for carrier */ while ((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0) { tp->t_state |= TS_WOPEN; error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); if (error) { splx(s); return(error); } } done: /* This is a way to handle lost XON characters */ if ((flag & O_TRUNC) && (tp->t_state & TS_TTSTOP)) { tp->t_state &= ~TS_TTSTOP; ttstart (tp); } splx(s); /* * Reset the tty pointer, as there could have been a dialout * use of the tty with a dialin open waiting. */ tp->t_dev = dev; return((*linesw[tp->t_line].l_open)(dev, tp)); } /*ARGSUSED*/ int mfcsclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { struct tty *tp; int unit; struct mfcs_softc *sc = mfcscd.cd_devs[dev & 31]; struct mfc_softc *scc= sc->sc_mfc; unit = dev & 31; tp = sc->sc_tty; (*linesw[tp->t_line].l_close)(tp, flag); sc->sc_duart->ch_cr = 0x70; /* stop break */ scc->imask &= ~(0x7 << ((unit & 1) * 4)); scc->sc_regs->du_imr = scc->imask; if (sc->flags & CT_USED) { --scc->ct_usecnt; sc->flags &= ~CT_USED; } /* * If the device is closed, it's close, no matter whether we deal with * modem control signals nor not. */ #if 0 if (tp->t_cflag & HUPCL || tp->t_state & TS_WOPEN || (tp->t_state & TS_ISOPEN) == 0) #endif (void) mfcsmctl(dev, 0, DMSET); ttyclose(tp); #if not_yet if (tp != &mfcs_cons) { remove_vbl_function(&mfcs_vbl_node[unit]); ttyfree(tp); sc->sc_tty = (struct tty *) NULL; } #endif return (0); } int mfcsread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct mfcs_softc *sc = mfcscd.cd_devs[dev & 31]; struct tty *tp = sc->sc_tty; if (tp == NULL) return(ENXIO); return((*linesw[tp->t_line].l_read)(tp, uio, flag)); } int mfcswrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct mfcs_softc *sc = mfcscd.cd_devs[dev & 31]; struct tty *tp = sc->sc_tty; if (tp == NULL) return(ENXIO); return((*linesw[tp->t_line].l_write)(tp, uio, flag)); } struct tty * mfcstty(dev) dev_t dev; { struct mfcs_softc *sc = mfcscd.cd_devs[dev & 31]; return (sc->sc_tty); } int mfcsioctl(dev, cmd, data, flag, p) dev_t dev; caddr_t data; struct proc *p; { register struct tty *tp; register int unit = dev & 31; register int error; struct mfcs_softc *sc = mfcscd.cd_devs[dev & 31]; tp = sc->sc_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: sc->sc_duart->ch_cr = 0x60; /* start break */ break; case TIOCCBRK: sc->sc_duart->ch_cr = 0x70; /* stop break */ break; case TIOCSDTR: (void) mfcsmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIS); break; case TIOCCDTR: (void) mfcsmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIC); break; case TIOCMSET: (void) mfcsmctl(dev, *(int *) data, DMSET); break; case TIOCMBIS: (void) mfcsmctl(dev, *(int *) data, DMBIS); break; case TIOCMBIC: (void) mfcsmctl(dev, *(int *) data, DMBIC); break; case TIOCMGET: *(int *)data = mfcsmctl(dev, 0, DMGET); break; case TIOCGFLAGS: *(int *)data = SWFLAGS(dev); break; case TIOCSFLAGS: error = suser(p->p_ucred, &p->p_acflag); if (error != 0) return(EPERM); mfcsswflags[unit] = *(int *)data; mfcsswflags[unit] &= /* only allow valid flags */ (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS); /* XXXX need to change duart parameters? */ break; default: return(ENOTTY); } return(0); } int mfcsparam(tp, t) struct tty *tp; struct termios *t; { int cfcr, cflag, unit, ospeed; struct mfcs_softc *sc = mfcscd.cd_devs[tp->t_dev & 31]; struct mfc_softc *scc= sc->sc_mfc; cflag = t->c_cflag; unit = tp->t_dev & 31; if (sc->flags & CT_USED) { --scc->ct_usecnt; sc->flags &= ~CT_USED; } ospeed = ttspeedtab(t->c_ospeed, scc->mfc_iii ? mfcs3speedtab2 : mfcs2speedtab2); /* * If Baud Rate Generator can't generate requested speed, * try to use the counter/timer. */ if (ospeed < 0 && (scc->clk_frq % t->c_ospeed) == 0) { ospeed = scc->clk_frq / t->c_ospeed; /* divisor */ if (scc->ct_usecnt > 0 && scc->ct_val != ospeed) ospeed = -1; else { scc->sc_regs->du_ctur = ospeed >> 8; scc->sc_regs->du_ctlr = ospeed; scc->ct_val = ospeed; ++scc->ct_usecnt; sc->flags |= CT_USED; ospeed = 0xdd; } } /* XXXX 68681 duart could handle split speeds */ if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed)) return(EINVAL); /* XXXX handle parity, character size, stop bits, flow control */ /* * copy to tty */ tp->t_ispeed = t->c_ispeed; tp->t_ospeed = t->c_ospeed; tp->t_cflag = cflag; /* * enable interrupts */ scc->imask |= (0x2 << ((unit & 1) * 4)) | 0x80; scc->sc_regs->du_imr = scc->imask; #if defined(DEBUG) && 0 printf("mfcsparam: speed %d => %x ct %d imask %x cflag %x\n", t->c_ospeed, ospeed, scc->ct_val, scc->imask, cflag); #endif if (ospeed == 0) (void)mfcsmctl(tp->t_dev, 0, DMSET); /* hang up line */ else { /* * (re)enable DTR * and set baud rate. (8 bit mode) */ (void)mfcsmctl(tp->t_dev, TIOCM_DTR | TIOCM_RTS, DMSET); sc->sc_duart->ch_csr = ospeed; } return(0); } int mfcshwiflow(tp, flag) struct tty *tp; int flag; { struct mfcs_softc *sc = mfcscd.cd_devs[tp->t_dev & 31]; int unit = tp->t_dev & 1; if (flag) sc->sc_regs->du_btrst = 1 << unit; else sc->sc_regs->du_btst = 1 << unit; return 1; } int mfcsstart(tp) struct tty *tp; { int cc, s, unit; struct mfcs_softc *sc = mfcscd.cd_devs[tp->t_dev & 31]; struct mfc_softc *scc= sc->sc_mfc; if ((tp->t_state & TS_ISOPEN) == 0) return; unit = tp->t_dev & 1; s = splser(); if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) goto out; cc = tp->t_outq.c_cc; if (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 (cc == 0 || (tp->t_state & TS_BUSY)) goto out; /* * We only do bulk transfers if using CTSRTS flow control, not for * (probably sloooow) ixon/ixoff devices. */ if ((tp->t_cflag & CRTSCTS) == 0) cc = 1; /* * Limit the amount of output we do in one burst * to prevent hogging the CPU. */ if (cc > SEROBUF_SIZE) cc = SEROBUF_SIZE; cc = q_to_b(&tp->t_outq, sc->outbuf, cc); if (cc > 0) { tp->t_state |= TS_BUSY; sc->ptr = sc->outbuf; sc->end = sc->outbuf + cc; /* * Get first character out, then have TBE-interrupts blow out * further characters, until buffer is empty, and TS_BUSY gets * cleared. */ sc->sc_duart->ch_tb = *sc->ptr++; scc->imask |= 1 << (unit * 4); sc->sc_regs->du_imr = scc->imask; } out: splx(s); } /* * Stop output on a line. */ /*ARGSUSED*/ int mfcsstop(tp, flag) struct tty *tp; { int s; s = splser(); if (tp->t_state & TS_BUSY) { if ((tp->t_state & TS_TTSTOP) == 0) tp->t_state |= TS_FLUSH; } splx(s); } int mfcsmctl(dev, bits, how) dev_t dev; int bits, how; { int unit, s; u_char ub; struct mfcs_softc *sc = mfcscd.cd_devs[dev & 31]; unit = dev & 1; /* * convert TIOCM* mask into CIA mask * which is active low */ if (how != DMGET) { ub = 0; /* * need to save current state of DTR & RTS ? */ if (bits & TIOCM_DTR) ub |= 0x04 << unit; if (bits & TIOCM_RTS) ub |= 0x01 << unit; } s = splser(); switch (how) { case DMSET: sc->sc_regs->du_btst = ub; sc->sc_regs->du_btrst = ub ^ (0x05 << unit); break; case DMBIC: sc->sc_regs->du_btrst = ub; ub = ~sc->sc_regs->du_ip; break; case DMBIS: sc->sc_regs->du_btst = ub; ub = ~sc->sc_regs->du_ip; break; case DMGET: ub = ~sc->sc_regs->du_ip; break; } (void)splx(s); /* XXXX should keep DTR & RTS states in softc? */ bits = TIOCM_DTR | TIOCM_RTS; if (ub & (1 << unit)) bits |= TIOCM_CTS; if (ub & (4 << unit)) bits |= TIOCM_DSR; if (ub & (0x10 << unit)) bits |= TIOCM_CD; /* XXXX RI is not supported on all boards */ if (sc->sc_regs->pad26 & (1 << unit)) bits |= TIOCM_RI; return(bits); } /* * Level 6 interrupt processing for the MultiFaceCard 68681 DUART */ int mfcintr (scc) struct mfc_softc *scc; { struct mfcs_softc *sc; struct mfc_regs *regs; struct tty *tp; int istat, unit; u_short c; regs = scc->sc_regs; istat = regs->du_isr & scc->imask; if (istat == 0) return (0); unit = scc->sc_dev.dv_unit * 2; if (istat & 0x02) { /* channel A receive interrupt */ sc = mfcscd.cd_devs[unit]; while (1) { c = regs->du_sra << 8; if ((c & 0x0100) == 0) break; c |= regs->du_rba; if (sc->incnt == SERIBUF_SIZE) ++sc->ovfl; else { *sc->wptr++ = c; if (sc->wptr == sc->inbuf + SERIBUF_SIZE) sc->wptr = sc->inbuf; ++sc->incnt; if (sc->incnt > SERIBUF_SIZE - 16) regs->du_btrst = 1; } if (c & 0x1000) regs->du_cra = 0x40; } } if (istat & 0x20) { /* channel B receive interrupt */ sc = mfcscd.cd_devs[unit + 1]; while (1) { c = regs->du_srb << 8; if ((c & 0x0100) == 0) break; c |= regs->du_rbb; if (sc->incnt == SERIBUF_SIZE) ++sc->ovfl; else { *sc->wptr++ = c; if (sc->wptr == sc->inbuf + SERIBUF_SIZE) sc->wptr = sc->inbuf; ++sc->incnt; if (sc->incnt > SERIBUF_SIZE - 16) regs->du_btrst = 2; } if (c & 0x1000) regs->du_crb = 0x40; } } if (istat & 0x01) { /* channel A transmit interrupt */ sc = mfcscd.cd_devs[unit]; tp = sc->sc_tty; if (sc->ptr == sc->end) { tp->t_state &= ~(TS_BUSY | TS_FLUSH); scc->imask &= ~0x01; regs->du_imr = scc->imask; add_sicallback (tp->t_line ? (sifunc_t)linesw[tp->t_line].l_start : (sifunc_t)mfcsstart, tp, NULL); } else regs->du_tba = *sc->ptr++; } if (istat & 0x10) { /* channel B transmit interrupt */ sc = mfcscd.cd_devs[unit + 1]; tp = sc->sc_tty; if (sc->ptr == sc->end) { tp->t_state &= ~(TS_BUSY | TS_FLUSH); scc->imask &= ~0x10; regs->du_imr = scc->imask; add_sicallback (tp->t_line ? (sifunc_t)linesw[tp->t_line].l_start : (sifunc_t)mfcsstart, tp, NULL); } else regs->du_tbb = *sc->ptr++; } if (istat & 0x80) { /* input port change interrupt */ c = regs->du_ipcr; printf ("%s: ipcr %02x", scc->sc_dev.dv_xname, c); } return(1); } int mfcsxintr(unit) int unit; { int s1, s2, ovfl; struct mfcs_softc *sc = mfcscd.cd_devs[unit]; struct tty *tp = sc->sc_tty; /* * Make sure we're not interrupted by another * vbl, but allow level6 ints */ s1 = spltty(); /* * pass along any acumulated information * while input is not blocked */ while (sc->incnt && (tp->t_state & TS_TBLOCK) == 0) { /* * no collision with ser_fastint() */ mfcseint(unit, *sc->rptr++); ovfl = 0; /* lock against mfcs_fastint() */ s2 = splser(); --sc->incnt; if (sc->rptr == sc->inbuf + SERIBUF_SIZE) sc->rptr = sc->inbuf; if (sc->ovfl != 0) { ovfl = sc->ovfl; sc->ovfl = 0; } splx(s2); if (ovfl != 0) log(LOG_WARNING, "%s: %d buffer overflow!\n", sc->sc_dev.dv_xname, ovfl); } if (sc->incnt == 0 && (tp->t_state & TS_TBLOCK) == 0) { sc->sc_regs->du_btst = 1 << unit; /* XXXX */ } splx(s1); } int mfcseint(unit, stat) int unit, stat; { struct mfcs_softc *sc = mfcscd.cd_devs[unit]; struct tty *tp; u_char ch; int c; tp = sc->sc_tty; ch = stat & 0xff; c = ch; if ((tp->t_state & TS_ISOPEN) == 0) { #ifdef KGDB /* we don't care about parity errors */ if (kgdb_dev == makedev(sermajor, unit) && c == FRAME_END) kgdb_connect(0); /* trap into kgdb */ #endif return; } /* * Check for break and (if enabled) parity error. */ if (stat & 0xc000) c |= TTY_FE; else if (stat & 0x2000) c |= TTY_PE; if (stat & 0x1000) log(LOG_WARNING, "%s: fifo overflow\n", ((struct mfcs_softc *)mfcscd.cd_devs[unit])->sc_dev.dv_xname); (*linesw[tp->t_line].l_rint)(c, tp); } /* * This interrupt is periodically invoked in the vertical blank * interrupt. It's used to keep track of the modem control lines * and (new with the fast_int code) to move accumulated data * up into the tty layer. */ void mfcsmint(unit) int unit; { struct tty *tp; struct mfcs_softc *sc = mfcscd.cd_devs[unit]; u_char stat, last, istat; tp = sc->sc_tty; if (!tp) return; if ((tp->t_state & (TS_ISOPEN | TS_WOPEN)) == 0) { sc->rptr = sc->wptr = sc->inbuf; sc->incnt = 0; return; } /* * empty buffer */ mfcsxintr(unit); stat = ~sc->sc_regs->du_ip; last = sc->sc_mfc->last_ip; sc->sc_mfc->last_ip = stat; /* * check whether any interesting signal changed state */ istat = stat ^ last; if ((istat & (0x10 << (unit & 1))) && /* CD changed */ (SWFLAGS(tp->t_dev) & TIOCFLAG_SOFTCAR) == 0) { if (stat & (0x10 << (unit & 1))) (*linesw[tp->t_line].l_modem)(tp, 1); else if ((*linesw[tp->t_line].l_modem)(tp, 0) == 0) { sc->sc_regs->du_btrst = 0x0a << (unit & 1); } } }