/* $OpenBSD: dcm.c,v 1.32 2009/11/09 17:53:38 nicm Exp $ */ /* $NetBSD: dcm.c,v 1.41 1997/05/05 20:59:16 thorpej Exp $ */ /* * Copyright (c) 1995, 1996, 1997 Jason R. Thorpe. All rights reserved. * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1986, 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. 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. * * from Utah: $Hdr: dcm.c 1.29 92/01/21$ * * @(#)dcm.c 8.4 (Berkeley) 1/12/94 */ /* * TODO: * Timeouts * Test console support. */ /* * 98642/MUX */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef DEFAULT_BAUD_RATE #define DEFAULT_BAUD_RATE 9600 #endif const struct speedtab dcmspeedtab[] = { { 0, BR_0 }, { 50, BR_50 }, { 75, BR_75 }, { 110, BR_110 }, { 134, BR_134 }, { 150, BR_150 }, { 300, BR_300 }, { 600, BR_600 }, { 1200, BR_1200 }, { 1800, BR_1800 }, { 2400, BR_2400 }, { 4800, BR_4800 }, { 9600, BR_9600 }, { 19200, BR_19200 }, { 38400, BR_38400 }, { -1, -1 }, }; /* u-sec per character based on baudrate (assumes 1 start/8 data/1 stop bit) */ #define DCM_USPERCH(s) (10000000 / (s)) /* * Per board interrupt scheme. 16.7ms is the polling interrupt rate * (16.7ms is about 550 baud, 38.4k is 72 chars in 16.7ms). */ #define DIS_TIMER 0 #define DIS_PERCHAR 1 #define DIS_RESET 2 int dcmistype = -1; /* -1 == dynamic, 0 == timer, 1 == perchar */ int dcminterval = 5; /* interval (secs) between checks */ struct dcmischeme { int dis_perchar; /* non-zero if interrupting per char */ long dis_time; /* last time examined */ int dis_intr; /* recv interrupts during last interval */ int dis_char; /* characters read during last interval */ }; /* * Stuff for DCM console support. This could probably be done a little * better. */ static struct dcmdevice *dcm_cn = NULL; /* pointer to hardware */ static int dcmconsinit; /* has been initialized */ int dcmdefaultrate = DEFAULT_BAUD_RATE; int dcmconbrdbusy = 0; int dcmmajor; #ifdef KGDB /* * Kernel GDB support */ #include extern dev_t kgdb_dev; extern int kgdb_rate; extern int kgdb_debug_init; #endif /* #define DCMSTATS */ #ifdef DEBUG int dcmdebug = 0x0; #define DDB_SIOERR 0x01 #define DDB_PARAM 0x02 #define DDB_INPUT 0x04 #define DDB_OUTPUT 0x08 #define DDB_INTR 0x10 #define DDB_IOCTL 0x20 #define DDB_INTSCHM 0x40 #define DDB_MODEM 0x80 #define DDB_OPENCLOSE 0x100 #endif #ifdef DCMSTATS #define DCMRBSIZE 94 #define DCMXBSIZE 24 struct dcmstats { long xints; /* # of xmit ints */ long xchars; /* # of xmit chars */ long xempty; /* times outq is empty in dcmstart */ long xrestarts; /* times completed while xmitting */ long rints; /* # of recv ints */ long rchars; /* # of recv chars */ long xsilo[DCMXBSIZE+2]; /* times this many chars xmit on one int */ long rsilo[DCMRBSIZE+2]; /* times this many chars read on one int */ }; #endif #define DCMUNIT(x) (minor(x) & 0x7f) #define DCMCUA(x) (minor(x) & 0x80) #define DCMBOARD(x) (((x) >> 2) & 0x3f) #define DCMPORT(x) ((x) & 3) /* * Conversion from "HP DCE" to almost-normal DCE: on the 638 8-port mux, * the distribution panel uses "HP DCE" conventions. If requested via * the device flags, we swap the inputs to something closer to normal DCE, * allowing a straight-through cable to a DTE or a reversed cable * to a DCE (reversing 2-3, 4-5, 8-20 and leaving 6 unconnected; * this gets "DCD" on pin 20 and "CTS" on 4, but doesn't connect * DSR or make RTS work, though). The following gives the full * details of a cable from this mux panel to a modem: * * HP modem * name pin pin name * HP inputs: * "Rx" 2 3 Tx * CTS 4 5 CTS (only needed for CCTS_OFLOW) * DCD 20 8 DCD * "DSR" 9 6 DSR (unneeded) * RI 22 22 RI (unneeded) * * HP outputs: * "Tx" 3 2 Rx * "DTR" 6 not connected * "RTS" 8 20 DTR * "SR" 23 4 RTS (often not needed) */ #define hp2dce_in(ibits) (iconv[(ibits) & 0xf]) static char iconv[16] = { 0, MI_DM, MI_CTS, MI_CTS|MI_DM, MI_CD, MI_CD|MI_DM, MI_CD|MI_CTS, MI_CD|MI_CTS|MI_DM, MI_RI, MI_RI|MI_DM, MI_RI|MI_CTS, MI_RI|MI_CTS|MI_DM, MI_RI|MI_CD, MI_RI|MI_CD|MI_DM, MI_RI|MI_CD|MI_CTS, MI_RI|MI_CD|MI_CTS|MI_DM }; /* * Note that 8-port boards appear as 2 4-port boards at consecutive * select codes. */ #define NDCMPORT 4 struct dcm_softc { struct device sc_dev; /* generic device glue */ struct isr sc_isr; struct dcmdevice *sc_dcm; /* pointer to hardware */ struct tty *sc_tty[NDCMPORT]; /* our tty instances */ struct modemreg *sc_modem[NDCMPORT]; /* modem control */ char sc_mcndlast[NDCMPORT]; /* XXX last modem status for port */ short sc_softCAR; /* mask of ports with soft-carrier */ struct dcmischeme sc_scheme; /* interrupt scheme for board */ u_char sc_cua; /* callout mode */ /* * Mask of soft-carrier bits in config flags. */ #define DCM_SOFTCAR 0x0000000f int sc_flags; /* misc. configuration info */ /* * Bits for sc_flags */ #define DCM_ACTIVE 0x00000001 /* indicates board is alive */ #define DCM_ISCONSOLE 0x00000002 /* indicates board is console */ #define DCM_STDDCE 0x00000010 /* re-map DCE to standard */ #define DCM_FLAGMASK (DCM_STDDCE) /* mask of valid bits in config flags */ #ifdef DCMSTATS struct dcmstats sc_stats; /* metrics gathering */ #endif }; cdev_decl(dcm); int dcmintr(void *); void dcmpint(struct dcm_softc *, int, int); void dcmrint(struct dcm_softc *); void dcmreadbuf(struct dcm_softc *, int); void dcmxint(struct dcm_softc *, int); void dcmmint(struct dcm_softc *, int, int); int dcmparam(struct tty *, struct termios *); void dcmstart(struct tty *); int dcmstop(struct tty *, int); int dcmmctl(dev_t, int, int); void dcmsetischeme(int, int); void dcminit(struct dcmdevice *, int, int); int dcmselftest(struct dcm_softc *); int dcm_console_scan(int, caddr_t, void *); cons_decl(dcm); int dcmmatch(struct device *, void *, void *); void dcmattach(struct device *, struct device *, void *); struct cfattach dcm_ca = { sizeof(struct dcm_softc), dcmmatch, dcmattach }; struct cfdriver dcm_cd = { NULL, "dcm", DV_TTY }; int dcmmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct dio_attach_args *da = aux; switch (da->da_id) { case DIO_DEVICE_ID_DCM: case DIO_DEVICE_ID_DCMREM: return (1); } return (0); } void dcmattach(parent, self, aux) struct device *parent, *self; void *aux; { struct dcm_softc *sc = (struct dcm_softc *)self; struct dio_attach_args *da = aux; struct dcmdevice *dcm; int brd = self->dv_unit; int scode = da->da_scode; int i, mbits, code, ipl; sc->sc_flags = 0; if (scode == conscode) { dcm = (struct dcmdevice *)conaddr; sc->sc_flags |= DCM_ISCONSOLE; /* * We didn't know which unit this would be during * the console probe, so we have to fixup cn_dev here. * Note that we always assume port 1 on the board. */ cn_tab->cn_dev = makedev(dcmmajor, (brd << 2) | DCMCONSPORT); } else { dcm = (struct dcmdevice *)iomap(dio_scodetopa(da->da_scode), da->da_size); if (dcm == NULL) { printf("\n%s: can't map registers\n", sc->sc_dev.dv_xname); return; } } sc->sc_dcm = dcm; ipl = DIO_IPL(dcm); printf(" ipl %d", ipl); /* * XXX someone _should_ fix this; the self test screws * autoconfig messages. */ if ((sc->sc_flags & DCM_ISCONSOLE) && dcmselftest(sc)) { printf("\n%s: self-test failed\n", sc->sc_dev.dv_xname); return; } /* Extract configuration info from flags. */ sc->sc_softCAR = self->dv_cfdata->cf_flags & DCM_SOFTCAR; sc->sc_flags |= self->dv_cfdata->cf_flags & DCM_FLAGMASK; /* Mark our unit as configured. */ sc->sc_flags |= DCM_ACTIVE; /* Establish the interrupt handler. */ sc->sc_isr.isr_func = dcmintr; sc->sc_isr.isr_arg = sc; sc->sc_isr.isr_ipl = ipl; sc->sc_isr.isr_priority = IPL_TTY; dio_intr_establish(&sc->sc_isr, self->dv_xname); if (dcmistype == DIS_TIMER) dcmsetischeme(brd, DIS_RESET|DIS_TIMER); else dcmsetischeme(brd, DIS_RESET|DIS_PERCHAR); /* load pointers to modem control */ sc->sc_modem[0] = &dcm->dcm_modem0; sc->sc_modem[1] = &dcm->dcm_modem1; sc->sc_modem[2] = &dcm->dcm_modem2; sc->sc_modem[3] = &dcm->dcm_modem3; /* set DCD (modem) and CTS (flow control) on all ports */ if (sc->sc_flags & DCM_STDDCE) mbits = hp2dce_in(MI_CD|MI_CTS); else mbits = MI_CD|MI_CTS; for (i = 0; i < NDCMPORT; i++) sc->sc_modem[i]->mdmmsk = mbits; /* * Get current state of mdmin register on all ports, so that * deltas will work properly. */ for (i = 0; i < NDCMPORT; i++) { code = sc->sc_modem[i]->mdmin; if (sc->sc_flags & DCM_STDDCE) code = hp2dce_in(code); sc->sc_mcndlast[i] = code; } dcm->dcm_ic = IC_IE; /* turn all interrupts on */ /* * Need to reset baud rate, etc. of next print so reset dcmconsinit. * Also make sure console is always "hardwired" */ if (sc->sc_flags & DCM_ISCONSOLE) { dcmconsinit = 0; sc->sc_softCAR |= (1 << DCMCONSPORT); printf(": console on port %d\n", DCMCONSPORT); } else printf("\n"); #ifdef KGDB if (major(kgdb_dev) == dcmmajor && DCMBOARD(DCMUNIT(kgdb_dev)) == brd) { if (dcmconsole == DCMUNIT(kgdb_dev)) /* XXX fixme */ kgdb_dev = NODEV; /* can't debug over console port */ #ifndef KGDB_CHEAT /* * The following could potentially be replaced * by the corresponding code in dcmcnprobe. */ else { dcminit(dcm, DCMPORT(DCMUNIT(kgdb_dev)), kgdb_rate); if (kgdb_debug_init) { printf("%s port %d: ", sc->sc_dev.dv_xname, DCMPORT(DCMUNIT(kgdb_dev))); kgdb_connect(1); } else printf("%s port %d: kgdb enabled\n", sc->sc_dev.dv_xname, DCMPORT(DCMUNIT(kgdb_dev))); } /* end could be replaced */ #endif /* KGDB_CHEAT */ } #endif /* KGDB */ } /* ARGSUSED */ int dcmopen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { struct dcm_softc *sc; struct tty *tp; int unit, brd, port; int error = 0, mbits, s; unit = DCMUNIT(dev); brd = DCMBOARD(unit); port = DCMPORT(unit); if (brd >= dcm_cd.cd_ndevs || port >= NDCMPORT || (sc = dcm_cd.cd_devs[brd]) == NULL) return (ENXIO); if ((sc->sc_flags & DCM_ACTIVE) == 0) return (ENXIO); s = spltty(); if (sc->sc_tty[port] == NULL) { tp = sc->sc_tty[port] = ttymalloc(); } else tp = sc->sc_tty[port]; splx(s); tp->t_oproc = dcmstart; tp->t_param = dcmparam; tp->t_dev = dev; if ((tp->t_state & TS_ISOPEN) == 0) { /* * Sanity clause: reset the card on first open. * The card might be left in an inconsistent state * if the card memory is read inadvertently. */ dcminit(sc->sc_dcm, port, dcmdefaultrate); tp->t_state |= TS_WOPEN; ttychars(tp); 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 = TTYDEF_SPEED; s = spltty(); (void) dcmparam(tp, &tp->t_termios); ttsetwater(tp); } else if (tp->t_state & TS_XCLUDE && suser(p, 0) != 0) return (EBUSY); else s = spltty(); /* Set modem control state. */ mbits = MO_ON; if (sc->sc_flags & DCM_STDDCE) mbits |= MO_SR; /* pin 23, could be used as RTS */ (void) dcmmctl(dev, mbits, DMSET); /* enable port */ /* Set soft-carrier if so configured. */ if ((sc->sc_softCAR & (1 << port)) || DCMCUA(dev) || (dcmmctl(dev, MO_OFF, DMGET) & MI_CD)) tp->t_state |= TS_CARR_ON; if (DCMCUA(dev)) { if (tp->t_state & TS_ISOPEN) { /* Ah, but someone already is dialed in... */ splx(s); return (EBUSY); } sc->sc_cua = 1; /* We go into CUA mode */ } #ifdef DEBUG if (dcmdebug & DDB_MODEM) printf("%s: dcmopen port %d softcarr %c\n", sc->sc_dev.dv_xname, port, (tp->t_state & TS_CARR_ON) ? '1' : '0'); #endif /* Wait for carrier if necessary. */ if (flag & O_NONBLOCK) { if (!DCMCUA(dev) && sc->sc_cua) { /* Opening TTY non-blocking... but the CUA is busy */ splx(s); return (EBUSY); } } else { while (sc->sc_cua || ((tp->t_cflag & CLOCAL) == 0 && (tp->t_state & TS_CARR_ON) == 0)) { tp->t_state |= TS_WOPEN; error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); if (!DCMCUA(dev) && sc->sc_cua && error == EINTR) continue; if (error) { if (DCMCUA(dev)) sc->sc_cua = 0; splx(s); return (error); } if (!DCMCUA(dev) && sc->sc_cua) continue; } } splx(s); #ifdef DEBUG if (dcmdebug & DDB_OPENCLOSE) printf("%s port %d: dcmopen: st %x fl %x\n", sc->sc_dev.dv_xname, port, tp->t_state, tp->t_flags); #endif if (error == 0) error = (*linesw[tp->t_line].l_open)(dev, tp); return (error); } /*ARGSUSED*/ int dcmclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int s, unit, board, port; struct dcm_softc *sc; struct tty *tp; unit = DCMUNIT(dev); board = DCMBOARD(unit); port = DCMPORT(unit); sc = dcm_cd.cd_devs[board]; tp = sc->sc_tty[port]; (*linesw[tp->t_line].l_close)(tp, flag); s = spltty(); if (tp->t_cflag & HUPCL || tp->t_state & TS_WOPEN || (tp->t_state & TS_ISOPEN) == 0) (void) dcmmctl(dev, MO_OFF, DMSET); #ifdef DEBUG if (dcmdebug & DDB_OPENCLOSE) printf("%s port %d: dcmclose: st %x fl %x\n", sc->sc_dev.dv_xname, port, tp->t_state, tp->t_flags); #endif sc->sc_cua = 0; splx(s); ttyclose(tp); #if 0 ttyfree(tp); sc->sc_tty[port] == NULL; #endif return (0); } int dcmread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { int unit, board, port; struct dcm_softc *sc; struct tty *tp; unit = DCMUNIT(dev); board = DCMBOARD(unit); port = DCMPORT(unit); sc = dcm_cd.cd_devs[board]; tp = sc->sc_tty[port]; return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); } int dcmwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { int unit, board, port; struct dcm_softc *sc; struct tty *tp; unit = DCMUNIT(dev); board = DCMBOARD(unit); port = DCMPORT(unit); sc = dcm_cd.cd_devs[board]; tp = sc->sc_tty[port]; return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); } struct tty * dcmtty(dev) dev_t dev; { int unit, board, port; struct dcm_softc *sc; unit = DCMUNIT(dev); board = DCMBOARD(unit); port = DCMPORT(unit); sc = dcm_cd.cd_devs[board]; return (sc->sc_tty[port]); } int dcmintr(arg) void *arg; { struct dcm_softc *sc = arg; struct dcmdevice *dcm = sc->sc_dcm; struct dcmischeme *dis = &sc->sc_scheme; int brd = sc->sc_dev.dv_unit; int code, i; int pcnd[4], mcode, mcnd[4]; /* * Do all guarded accesses right off to minimize * block out of hardware. */ SEM_LOCK(dcm); if ((dcm->dcm_ic & IC_IR) == 0) { SEM_UNLOCK(dcm); return (0); } for (i = 0; i < 4; i++) { pcnd[i] = dcm->dcm_icrtab[i].dcm_data; dcm->dcm_icrtab[i].dcm_data = 0; code = sc->sc_modem[i]->mdmin; if (sc->sc_flags & DCM_STDDCE) code = hp2dce_in(code); mcnd[i] = code; } code = dcm->dcm_iir & IIR_MASK; dcm->dcm_iir = 0; /* XXX doc claims read clears interrupt?! */ mcode = dcm->dcm_modemintr; dcm->dcm_modemintr = 0; SEM_UNLOCK(dcm); #ifdef DEBUG if (dcmdebug & DDB_INTR) { printf("%s: dcmintr: iir %x pc %x/%x/%x/%x ", sc->sc_dev.dv_xname, code, pcnd[0], pcnd[1], pcnd[2], pcnd[3]); printf("miir %x mc %x/%x/%x/%x\n", mcode, mcnd[0], mcnd[1], mcnd[2], mcnd[3]); } #endif if (code & IIR_TIMEO) dcmrint(sc); if (code & IIR_PORT0) dcmpint(sc, 0, pcnd[0]); if (code & IIR_PORT1) dcmpint(sc, 1, pcnd[1]); if (code & IIR_PORT2) dcmpint(sc, 2, pcnd[2]); if (code & IIR_PORT3) dcmpint(sc, 3, pcnd[3]); if (code & IIR_MODM) { if (mcode == 0 || mcode & 0x1) /* mcode==0 -> 98642 board */ dcmmint(sc, 0, mcnd[0]); if (mcode & 0x2) dcmmint(sc, 1, mcnd[1]); if (mcode & 0x4) dcmmint(sc, 2, mcnd[2]); if (mcode & 0x8) dcmmint(sc, 3, mcnd[3]); } /* * Chalk up a receiver interrupt if the timer running or one of * the ports reports a special character interrupt. */ if ((code & IIR_TIMEO) || ((pcnd[0]|pcnd[1]|pcnd[2]|pcnd[3]) & IT_SPEC)) dis->dis_intr++; /* * See if it is time to check/change the interrupt rate. */ if (dcmistype < 0 && (i = time.tv_sec - dis->dis_time) >= dcminterval) { /* * If currently per-character and averaged over 70 interrupts * per-second (66 is threshold of 600 baud) in last interval, * switch to timer mode. * * XXX decay counts ala load average to avoid spikes? */ if (dis->dis_perchar && dis->dis_intr > 70 * i) dcmsetischeme(brd, DIS_TIMER); /* * If currently using timer and had more interrupts than * received characters in the last interval, switch back * to per-character. Note that after changing to per-char * we must process any characters already in the queue * since they may have arrived before the bitmap was setup. * * XXX decay counts? */ else if (!dis->dis_perchar && dis->dis_intr > dis->dis_char) { dcmsetischeme(brd, DIS_PERCHAR); dcmrint(sc); } dis->dis_intr = dis->dis_char = 0; dis->dis_time = time.tv_sec; } return (1); } /* * Port interrupt. Can be two things: * First, it might be a special character (exception interrupt); * Second, it may be a buffer empty (transmit interrupt); */ void dcmpint(sc, port, code) struct dcm_softc *sc; int port, code; { if (code & IT_SPEC) dcmreadbuf(sc, port); if (code & IT_TX) dcmxint(sc, port); } void dcmrint(sc) struct dcm_softc *sc; { int port; for (port = 0; port < NDCMPORT; port++) dcmreadbuf(sc, port); } void dcmreadbuf(sc, port) struct dcm_softc *sc; int port; { struct dcmdevice *dcm = sc->sc_dcm; struct dcmpreg *pp = dcm_preg(dcm, port); struct dcmrfifo *fifo; struct tty *tp; int c, stat; u_int head; int nch = 0; #ifdef DCMSTATS struct dcmstats *dsp = &sc->sc_stats; dsp->rints++; #endif tp = sc->sc_tty[port]; if (tp == NULL) return; if ((tp->t_state & TS_ISOPEN) == 0) { #ifdef KGDB if ((makedev(dcmmajor, minor(tp->t_dev)) == kgdb_dev) && (head = pp->r_head & RX_MASK) != (pp->r_tail & RX_MASK) && dcm->dcm_rfifos[3-port][head>>1].data_char == FRAME_START) { pp->r_head = (head + 2) & RX_MASK; kgdb_connect(0); /* trap into kgdb */ return; } #endif /* KGDB */ pp->r_head = pp->r_tail & RX_MASK; return; } head = pp->r_head & RX_MASK; fifo = &dcm->dcm_rfifos[3-port][head>>1]; /* * XXX upper bound on how many chars we will take in one swallow? */ while (head != (pp->r_tail & RX_MASK)) { /* * Get character/status and update head pointer as fast * as possible to make room for more characters. */ c = fifo->data_char; stat = fifo->data_stat; head = (head + 2) & RX_MASK; pp->r_head = head; fifo = head ? fifo+1 : &dcm->dcm_rfifos[3-port][0]; nch++; #ifdef DEBUG if (dcmdebug & DDB_INPUT) printf("%s port %d: dcmreadbuf: c%x('%c') s%x f%x h%x t%x\n", sc->sc_dev.dv_xname, port, c&0xFF, c, stat&0xFF, tp->t_flags, head, pp->r_tail); #endif /* * Check for and handle errors */ if (stat & RD_MASK) { #ifdef DEBUG if (dcmdebug & (DDB_INPUT|DDB_SIOERR)) printf("%s port %d: dcmreadbuf: err: c%x('%c') s%x\n", sc->sc_dev.dv_xname, port, stat, c&0xFF, c); #endif if (stat & (RD_BD | RD_FE)) c |= TTY_FE; else if (stat & RD_PE) c |= TTY_PE; else if (stat & RD_OVF) log(LOG_WARNING, "%s port %d: silo overflow\n", sc->sc_dev.dv_xname, port); else if (stat & RD_OE) log(LOG_WARNING, "%s port %d: uart overflow\n", sc->sc_dev.dv_xname, port); } (*linesw[tp->t_line].l_rint)(c, tp); } sc->sc_scheme.dis_char += nch; #ifdef DCMSTATS dsp->rchars += nch; if (nch <= DCMRBSIZE) dsp->rsilo[nch]++; else dsp->rsilo[DCMRBSIZE+1]++; #endif } void dcmxint(sc, port) struct dcm_softc *sc; int port; { struct tty *tp; tp = sc->sc_tty[port]; if (tp == NULL || (tp->t_state & TS_ISOPEN) == 0) return; tp->t_state &= ~TS_BUSY; if (tp->t_state & TS_FLUSH) tp->t_state &= ~TS_FLUSH; (*linesw[tp->t_line].l_start)(tp); } void dcmmint(sc, port, mcnd) struct dcm_softc *sc; int port, mcnd; { int delta; struct tty *tp; struct dcmdevice *dcm = sc->sc_dcm; tp = sc->sc_tty[port]; if (tp == NULL || (tp->t_state & TS_ISOPEN) == 0) return; #ifdef DEBUG if (dcmdebug & DDB_MODEM) printf("%s port %d: dcmmint: mcnd %x mcndlast %x\n", sc->sc_dev.dv_xname, port, mcnd, sc->sc_mcndlast[port]); #endif delta = mcnd ^ sc->sc_mcndlast[port]; sc->sc_mcndlast[port] = mcnd; if ((delta & MI_CTS) && (tp->t_state & TS_ISOPEN) && (tp->t_flags & CCTS_OFLOW)) { if (mcnd & MI_CTS) { tp->t_state &= ~TS_TTSTOP; ttstart(tp); } else tp->t_state |= TS_TTSTOP; /* inline dcmstop */ } if (delta & MI_CD) { if (mcnd & MI_CD) (void)(*linesw[tp->t_line].l_modem)(tp, 1); else if ((sc->sc_softCAR & (1 << port)) == 0 && (*linesw[tp->t_line].l_modem)(tp, 0) == 0) { sc->sc_modem[port]->mdmout = MO_OFF; SEM_LOCK(dcm); dcm->dcm_modemchng |= (1 << port); dcm->dcm_cr |= CR_MODM; SEM_UNLOCK(dcm); DELAY(10); /* time to change lines */ } } } int dcmioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { struct dcm_softc *sc; struct tty *tp; struct dcmdevice *dcm; int board, port, unit = DCMUNIT(dev); int error, s; port = DCMPORT(unit); board = DCMBOARD(unit); sc = dcm_cd.cd_devs[board]; dcm = sc->sc_dcm; tp = sc->sc_tty[port]; #ifdef DEBUG if (dcmdebug & DDB_IOCTL) printf("%s port %d: dcmioctl: cmd %lx data %x flag %x\n", sc->sc_dev.dv_xname, port, cmd, *data, flag); #endif 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: /* * Wait for transmitter buffer to empty */ s = spltty(); while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr) DELAY(DCM_USPERCH(tp->t_ospeed)); SEM_LOCK(dcm); dcm->dcm_cmdtab[port].dcm_data |= CT_BRK; dcm->dcm_cr |= (1 << port); /* start break */ SEM_UNLOCK(dcm); splx(s); break; case TIOCCBRK: SEM_LOCK(dcm); dcm->dcm_cmdtab[port].dcm_data |= CT_BRK; dcm->dcm_cr |= (1 << port); /* end break */ SEM_UNLOCK(dcm); break; case TIOCSDTR: (void) dcmmctl(dev, MO_ON, DMBIS); break; case TIOCCDTR: (void) dcmmctl(dev, MO_ON, DMBIC); break; case TIOCMSET: (void) dcmmctl(dev, *(int *)data, DMSET); break; case TIOCMBIS: (void) dcmmctl(dev, *(int *)data, DMBIS); break; case TIOCMBIC: (void) dcmmctl(dev, *(int *)data, DMBIC); break; case TIOCMGET: *(int *)data = dcmmctl(dev, 0, DMGET); break; case TIOCGFLAGS: { int bits = 0; if ((sc->sc_softCAR & (1 << port))) bits |= TIOCFLAG_SOFTCAR; if (tp->t_cflag & CLOCAL) bits |= TIOCFLAG_CLOCAL; *(int *)data = bits; break; } case TIOCSFLAGS: { int userbits; error = suser(p, 0); if (error) return (EPERM); userbits = *(int *)data; if ((userbits & TIOCFLAG_SOFTCAR) || ((sc->sc_flags & DCM_ISCONSOLE) && (port == DCMCONSPORT))) sc->sc_softCAR |= (1 << port); if (userbits & TIOCFLAG_CLOCAL) tp->t_cflag |= CLOCAL; break; } default: return (ENOTTY); } return (0); } int dcmparam(tp, t) struct tty *tp; struct termios *t; { struct dcm_softc *sc; struct dcmdevice *dcm; int unit, board, port, mode, cflag = t->c_cflag; int ospeed = ttspeedtab(t->c_ospeed, dcmspeedtab); unit = DCMUNIT(tp->t_dev); board = DCMBOARD(unit); port = DCMPORT(unit); sc = dcm_cd.cd_devs[board]; dcm = sc->sc_dcm; /* check requested parameters */ if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed)) return (EINVAL); /* and copy to tty */ tp->t_ispeed = t->c_ispeed; tp->t_ospeed = t->c_ospeed; tp->t_cflag = cflag; if (ospeed == 0) { (void) dcmmctl(DCMUNIT(tp->t_dev), MO_OFF, DMSET); return (0); } mode = 0; switch (cflag&CSIZE) { case CS5: mode = LC_5BITS; break; case CS6: mode = LC_6BITS; break; case CS7: mode = LC_7BITS; break; case CS8: mode = LC_8BITS; break; } if (cflag&PARENB) { if (cflag&PARODD) mode |= LC_PODD; else mode |= LC_PEVEN; } if (cflag&CSTOPB) mode |= LC_2STOP; else mode |= LC_1STOP; #ifdef DEBUG if (dcmdebug & DDB_PARAM) printf("%s port %d: dcmparam: cflag %x mode %x speed %d uperch %d\n", sc->sc_dev.dv_xname, port, cflag, mode, tp->t_ospeed, DCM_USPERCH(tp->t_ospeed)); #endif /* * Wait for transmitter buffer to empty. */ while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr) DELAY(DCM_USPERCH(tp->t_ospeed)); /* * Make changes known to hardware. */ dcm->dcm_data[port].dcm_baud = ospeed; dcm->dcm_data[port].dcm_conf = mode; SEM_LOCK(dcm); dcm->dcm_cmdtab[port].dcm_data |= CT_CON; dcm->dcm_cr |= (1 << port); SEM_UNLOCK(dcm); /* * Delay for config change to take place. Weighted by baud. * XXX why do we do this? */ DELAY(16 * DCM_USPERCH(tp->t_ospeed)); return (0); } void dcmstart(tp) struct tty *tp; { struct dcm_softc *sc; struct dcmdevice *dcm; struct dcmpreg *pp; struct dcmtfifo *fifo; char *bp; u_int head, tail, next; int unit, board, port, nch; char buf[16]; int s; #ifdef DCMSTATS struct dcmstats *dsp = &sc->sc_stats; int tch = 0; #endif unit = DCMUNIT(tp->t_dev); board = DCMBOARD(unit); port = DCMPORT(unit); sc = dcm_cd.cd_devs[board]; dcm = sc->sc_dcm; s = spltty(); #ifdef DCMSTATS dsp->xints++; #endif #ifdef DEBUG if (dcmdebug & DDB_OUTPUT) printf("%s port %d: dcmstart: state %x flags %x outcc %d\n", sc->sc_dev.dv_xname, port, tp->t_state, tp->t_flags, tp->t_outq.c_cc); #endif if (tp->t_state & (TS_TIMEOUT|TS_BUSY|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) { #ifdef DCMSTATS dsp->xempty++; #endif goto out; } pp = dcm_preg(dcm, port); tail = pp->t_tail & TX_MASK; next = (tail + 1) & TX_MASK; head = pp->t_head & TX_MASK; if (head == next) goto out; fifo = &dcm->dcm_tfifos[3-port][tail]; again: nch = q_to_b(&tp->t_outq, buf, (head - next) & TX_MASK); #ifdef DCMSTATS tch += nch; #endif #ifdef DEBUG if (dcmdebug & DDB_OUTPUT) printf("\thead %x tail %x nch %d\n", head, tail, nch); #endif /* * Loop transmitting all the characters we can. */ for (bp = buf; --nch >= 0; bp++) { fifo->data_char = *bp; pp->t_tail = next; /* * If this is the first character, * get the hardware moving right now. */ if (bp == buf) { tp->t_state |= TS_BUSY; SEM_LOCK(dcm); dcm->dcm_cmdtab[port].dcm_data |= CT_TX; dcm->dcm_cr |= (1 << port); SEM_UNLOCK(dcm); } tail = next; fifo = tail ? fifo+1 : &dcm->dcm_tfifos[3-port][0]; next = (next + 1) & TX_MASK; } /* * Head changed while we were loading the buffer, * go back and load some more if we can. */ if (tp->t_outq.c_cc && head != (pp->t_head & TX_MASK)) { #ifdef DCMSTATS dsp->xrestarts++; #endif head = pp->t_head & TX_MASK; goto again; } /* * Kick it one last time in case it finished while we were * loading the last bunch. */ if (bp > &buf[1]) { tp->t_state |= TS_BUSY; SEM_LOCK(dcm); dcm->dcm_cmdtab[port].dcm_data |= CT_TX; dcm->dcm_cr |= (1 << port); SEM_UNLOCK(dcm); } #ifdef DEBUG if (dcmdebug & DDB_INTR) printf("%s port %d: dcmstart: head %x tail %x outqcc %d\n", sc->sc_dev.dv_xname, port, head, tail, tp->t_outq.c_cc); #endif out: #ifdef DCMSTATS dsp->xchars += tch; if (tch <= DCMXBSIZE) dsp->xsilo[tch]++; else dsp->xsilo[DCMXBSIZE+1]++; #endif splx(s); } /* * Stop output on a line. */ int dcmstop(tp, flag) struct tty *tp; int flag; { int s; s = spltty(); if (tp->t_state & TS_BUSY) { /* XXX is there some way to safely stop transmission? */ if ((tp->t_state&TS_TTSTOP) == 0) tp->t_state |= TS_FLUSH; } splx(s); return (0); } /* * Modem control */ int dcmmctl(dev, bits, how) dev_t dev; int bits, how; { struct dcm_softc *sc; struct dcmdevice *dcm; int s, unit, brd, port, hit = 0; unit = DCMUNIT(dev); brd = DCMBOARD(unit); port = DCMPORT(unit); sc = dcm_cd.cd_devs[brd]; dcm = sc->sc_dcm; #ifdef DEBUG if (dcmdebug & DDB_MODEM) printf("%s port %d: dcmmctl: bits 0x%x how %x\n", sc->sc_dev.dv_xname, port, bits, how); #endif s = spltty(); switch (how) { case DMSET: sc->sc_modem[port]->mdmout = bits; hit++; break; case DMBIS: sc->sc_modem[port]->mdmout |= bits; hit++; break; case DMBIC: sc->sc_modem[port]->mdmout &= ~bits; hit++; break; case DMGET: bits = sc->sc_modem[port]->mdmin; if (sc->sc_flags & DCM_STDDCE) bits = hp2dce_in(bits); break; } if (hit) { SEM_LOCK(dcm); dcm->dcm_modemchng |= 1<<(unit & 3); dcm->dcm_cr |= CR_MODM; SEM_UNLOCK(dcm); DELAY(10); /* delay until done */ splx(s); } return (bits); } /* * Set board to either interrupt per-character or at a fixed interval. */ void dcmsetischeme(brd, flags) int brd, flags; { struct dcm_softc *sc = dcm_cd.cd_devs[brd]; struct dcmdevice *dcm = sc->sc_dcm; struct dcmischeme *dis = &sc->sc_scheme; int i; u_char mask; int perchar = flags & DIS_PERCHAR; #ifdef DEBUG if (dcmdebug & DDB_INTSCHM) printf("%s: dcmsetischeme(%d): cur %d, ints %d, chars %d\n", sc->sc_dev.dv_xname, perchar, dis->dis_perchar, dis->dis_intr, dis->dis_char); if ((flags & DIS_RESET) == 0 && perchar == dis->dis_perchar) { printf("%s: dcmsetischeme: redundant request %d\n", sc->sc_dev.dv_xname, perchar); return; } #endif /* * If perchar is non-zero, we enable interrupts on all characters * otherwise we disable perchar interrupts and use periodic * polling interrupts. */ dis->dis_perchar = perchar; mask = perchar ? 0xf : 0x0; for (i = 0; i < 256; i++) dcm->dcm_bmap[i].data_data = mask; /* * Don't slow down tandem mode, interrupt on flow control * chars for any port on the board. */ if (!perchar) { struct tty *tp; int c; for (i = 0; i < NDCMPORT; i++) { tp = sc->sc_tty[i]; if ((c = tp->t_cc[VSTART]) != _POSIX_VDISABLE) dcm->dcm_bmap[c].data_data |= (1 << i); if ((c = tp->t_cc[VSTOP]) != _POSIX_VDISABLE) dcm->dcm_bmap[c].data_data |= (1 << i); } } /* * Board starts with timer disabled so if first call is to * set perchar mode then we don't want to toggle the timer. */ if (flags == (DIS_RESET|DIS_PERCHAR)) return; /* * Toggle card 16.7ms interrupts (we first make sure that card * has cleared the bit so it will see the toggle). */ while (dcm->dcm_cr & CR_TIMER) ; SEM_LOCK(dcm); dcm->dcm_cr |= CR_TIMER; SEM_UNLOCK(dcm); } void dcminit(dcm, port, rate) struct dcmdevice *dcm; int port, rate; { int s, mode; mode = LC_8BITS | LC_1STOP; s = splhigh(); /* * Wait for transmitter buffer to empty. */ while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr) DELAY(DCM_USPERCH(rate)); /* * Make changes known to hardware. */ dcm->dcm_data[port].dcm_baud = ttspeedtab(rate, dcmspeedtab); dcm->dcm_data[port].dcm_conf = mode; SEM_LOCK(dcm); dcm->dcm_cmdtab[port].dcm_data |= CT_CON; dcm->dcm_cr |= (1 << port); SEM_UNLOCK(dcm); /* * Delay for config change to take place. Weighted by baud. * XXX why do we do this? */ DELAY(16 * DCM_USPERCH(rate)); splx(s); } /* * Empirically derived self-test magic */ int dcmselftest(sc) struct dcm_softc *sc; { struct dcmdevice *dcm = sc->sc_dcm; int timo = 0; int s, rv; rv = 1; s = splhigh(); dcm->dcm_rsid = DCMRS; DELAY(50000); /* 5000 is not long enough */ dcm->dcm_rsid = 0; dcm->dcm_ic = IC_IE; dcm->dcm_cr = CR_SELFT; while ((dcm->dcm_ic & IC_IR) == 0) { if (++timo == 20000) goto out; DELAY(1); } DELAY(50000); /* XXX why is this needed ???? */ while ((dcm->dcm_iir & IIR_SELFT) == 0) { if (++timo == 400000) goto out; DELAY(1); } DELAY(50000); /* XXX why is this needed ???? */ if (dcm->dcm_stcon != ST_OK) { #if 0 if (hd->hp_args->hw_sc != conscode) printf("dcm%d: self test failed: %x\n", brd, dcm->dcm_stcon); #endif goto out; } dcm->dcm_ic = IC_ID; rv = 0; out: splx(s); return (rv); } /* * Following are all routines needed for DCM to act as console */ int dcm_console_scan(scode, va, arg) int scode; caddr_t va; void *arg; { struct dcmdevice *dcm = (struct dcmdevice *)va; struct consdev *cp = arg; u_int pri; switch (dcm->dcm_rsid) { case DCMID: pri = CN_LOWPRI; break; case DCMID|DCMCON: pri = CN_HIGHPRI; break; default: return (0); } #ifdef CONSCODE /* * Raise our priority, if appropriate. */ if (scode == CONSCODE) pri = CN_FORCED; #endif /* Only raise priority. */ if (pri > cp->cn_pri) cp->cn_pri = pri; /* * If our priority is higher than the currently-remembered * console, stash our priority, for the benefit of dcmcninit(). */ if (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri) { cn_tab = cp; conscode = scode; return (DIO_SIZE(scode, va)); } return (0); } void dcmcnprobe(cp) struct consdev *cp; { /* locate the major number */ for (dcmmajor = 0; dcmmajor < nchrdev; dcmmajor++) if (cdevsw[dcmmajor].d_open == dcmopen) break; /* initialize required fields */ cp->cn_dev = makedev(dcmmajor, 0); /* XXX */ console_scan(dcm_console_scan, cp); #ifdef KGDB_CHEAT /* XXX this needs to be fixed. */ /* * This doesn't currently work, at least not with ite consoles; * the console hasn't been initialized yet. */ if (major(kgdb_dev) == dcmmajor && DCMBOARD(DCMUNIT(kgdb_dev)) == DCMBOARD(unit)) { dcminit(dcm_cn, DCMPORT(DCMUNIT(kgdb_dev)), kgdb_rate); if (kgdb_debug_init) { /* * We assume that console is ready for us... * this assumes that a dca or ite console * has been selected already and will init * on the first putc. */ printf("dcm%d: ", DCMUNIT(kgdb_dev)); kgdb_connect(1); } } #endif } /* ARGSUSED */ void dcmcninit(cp) struct consdev *cp; { /* * We are not interested by the second console pass. */ if (consolepass != 0) return; dcm_cn = (struct dcmdevice *)conaddr; dcminit(dcm_cn, DCMCONSPORT, dcmdefaultrate); dcmconsinit = 1; } /* ARGSUSED */ int dcmcngetc(dev) dev_t dev; { struct dcmrfifo *fifo; struct dcmpreg *pp; u_int head; int s, c, stat; pp = dcm_preg(dcm_cn, DCMCONSPORT); s = splhigh(); head = pp->r_head & RX_MASK; fifo = &dcm_cn->dcm_rfifos[3-DCMCONSPORT][head>>1]; while (head == (pp->r_tail & RX_MASK)) ; /* * If board interrupts are enabled, just let our received char * interrupt through in case some other port on the board was * busy. Otherwise we must clear the interrupt. */ SEM_LOCK(dcm_cn); if ((dcm_cn->dcm_ic & IC_IE) == 0) stat = dcm_cn->dcm_iir; SEM_UNLOCK(dcm_cn); c = fifo->data_char; stat = fifo->data_stat; pp->r_head = (head + 2) & RX_MASK; splx(s); return (c); } /* * Console kernel output character routine. */ /* ARGSUSED */ void dcmcnputc(dev, c) dev_t dev; int c; { struct dcmpreg *pp; unsigned tail; int s, stat; pp = dcm_preg(dcm_cn, DCMCONSPORT); s = splhigh(); #ifdef KGDB if (dev != kgdb_dev) #endif if (dcmconsinit == 0) { dcminit(dcm_cn, DCMCONSPORT, dcmdefaultrate); dcmconsinit = 1; } tail = pp->t_tail & TX_MASK; while (tail != (pp->t_head & TX_MASK)) ; dcm_cn->dcm_tfifos[3-DCMCONSPORT][tail].data_char = c; pp->t_tail = tail = (tail + 1) & TX_MASK; SEM_LOCK(dcm_cn); dcm_cn->dcm_cmdtab[DCMCONSPORT].dcm_data |= CT_TX; dcm_cn->dcm_cr |= (1 << DCMCONSPORT); SEM_UNLOCK(dcm_cn); while (tail != (pp->t_head & TX_MASK)) ; /* * If board interrupts are enabled, just let our completion * interrupt through in case some other port on the board * was busy. Otherwise we must clear the interrupt. */ if ((dcm_cn->dcm_ic & IC_IE) == 0) { SEM_LOCK(dcm_cn); stat = dcm_cn->dcm_iir; SEM_UNLOCK(dcm_cn); } splx(s); }