/* $OpenBSD: msc.c,v 1.6 1997/01/16 09:25:04 niklas Exp $ */ /* $NetBSD: msc.c,v 1.13 1996/12/23 09:10:26 veego Exp $ */ /* * Copyright (c) 1993 Zik. * Copyright (c) 1995 Jukka Marin . * Copyright (c) 1995 Timo Rossi . * Copyright (c) 1995 Rob Healey . * Copyright (c) 1982, 1986, 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. * * - converted from NetBSD Amiga serial driver to A2232 serial driver * by zik 931207 * - added ttyflags hooks rfh 940419 * - added new style config support rfh 940601 * - added code to halt board during memory load so board doesn't flip * out. /dev/reload works now. Also created mschwiflow function so BSD can * attempt to use board RTS flow control now. rfh 950108 * - Integrated work from Jukka Marin and * Timo Rossi The mscmint() code is Jukka's. 950916 * Integrated more bug fixes by Jukka Marin 950918 * Also added Jukka's turbo board code. 950918 * - Reformatted to NetBSD style format. * - Rewritten the carrier detect system to prevent lock-ups (jm 951029) */ #include "msc.h" #if NMSC > 0 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 6502 code for A2232 card */ #include "msc6502.h" /* * Note: These are Zik's original comments: * There is a bit of a "gotcha" concerning the numbering * of msc devices and the specification of the number of serial * lines in the kernel. * * Each board has seven lines, but for programming convenience * and compatibility with Amiga UNIX the boards' minor device * numbers are allocated in groups of sixteen: * * minor device numbers * First board 0 2 4 6 8 10 12 * Second board 16 18 20 22 24 26 28 * Third board 32 34 36 38 40 42 44 * * The intermediate minor device numbers are dialin versions * of the same devices. ie. 10 is dialout line 6 and 11 is * the dialin version of line 6. * * On the other hand, I have made the NMSC config option refer * to the total number of a2232 cards, not the maximum * minor device number. So you might have NMSC=3, in which case * you have three boards with minor device numbers from 0 to 45. */ int mscparam __P((struct tty *, struct termios *)); void mscstart __P((struct tty *)); int mschwiflow __P((struct tty *, int)); int mscinitcard __P((struct zbus_args *)); int mscdefaultrate = TTYDEF_SPEED; struct mscdevice mscdev[MSCSLOTS]; /* device structs for all lines */ struct tty *msc_tty[MSCTTYS]; /* ttys for all lines */ struct vbl_node msc_vbl_node[NMSC]; /* vbl interrupt node per board */ struct speedtab mscspeedtab_normal[] = { { 0, 0 }, { 50, MSCPARAM_B50 }, { 75, MSCPARAM_B75 }, { 110, MSCPARAM_B110 }, { 134, MSCPARAM_B134 }, { 150, MSCPARAM_B150 }, { 300, MSCPARAM_B300 }, { 600, MSCPARAM_B600 }, { 1200, MSCPARAM_B1200 }, { 1800, MSCPARAM_B1800 }, { 2400, MSCPARAM_B2400 }, { 3600, MSCPARAM_B3600 }, { 4800, MSCPARAM_B4800 }, { 7200, MSCPARAM_B7200 }, { 9600, MSCPARAM_B9600 }, { 19200, MSCPARAM_B19200 }, { 115200, MSCPARAM_B115200 }, { -1, -1 } }; struct speedtab mscspeedtab_turbo[] = { { 0, 0 }, { 100, MSCPARAM_B50 }, { 150, MSCPARAM_B75 }, { 220, MSCPARAM_B110 }, { 269, MSCPARAM_B134 }, { 300, MSCPARAM_B150 }, { 600, MSCPARAM_B300 }, { 1200, MSCPARAM_B600 }, { 2400, MSCPARAM_B1200 }, { 3600, MSCPARAM_B1800 }, { 4800, MSCPARAM_B2400 }, { 7200, MSCPARAM_B3600 }, { 9600, MSCPARAM_B4800 }, { 14400, MSCPARAM_B7200 }, { 19200, MSCPARAM_B9600 }, { 38400, MSCPARAM_B19200 }, { 230400, MSCPARAM_B115200 }, { -1, -1 } }; struct speedtab *mscspeedtab; int mscmctl __P((dev_t dev, int bits, int howto)); void mscmint __P((register void *data)); int mscmatch __P((struct device *, void *, void *)); void mscattach __P((struct device *, struct device *, void *)); #define SWFLAGS(dev) (msc->openflags | (MSCDIALIN(dev) ? 0 : TIOCFLAG_SOFTCAR)) #define DEBUG_CD 0 struct cfattach msc_ca = { sizeof(struct device), mscmatch, mscattach }; struct cfdriver msc_cd = { NULL, "msc",DV_TTY, NULL, 0 }; int mscmatch(pdp, match, auxp) struct device *pdp; void *match, *auxp; { struct zbus_args *zap; zap = auxp; if (zap->manid == 514 && (zap->prodid == 70 || zap->prodid == 69)) return(1); return (0); } void mscattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { volatile struct mscmemory *mscmem; struct mscdevice *msc; struct zbus_args *zap; int unit; int Count; zap = (struct zbus_args *)auxp; unit = dp->dv_unit; /* * Make config msgs look nicer. */ printf("\n"); if (mscinitcard(zap) != 0) { printf("msc%d: Board initialize failed, bad download code.\n", unit); return; } printf("msc%d: Board successfully initialized.\n", unit); mscmem = (struct mscmemory *) zap->va; if (mscmem->Common.Crystal == MSC_UNKNOWN) { printf("msc%d: Unable to detect crystal frequency.\n", unit); return; } if (mscmem->Common.Crystal == MSC_TURBO) { printf("msc%d: Turbo version detected (%02x%02x:%d)\n", unit, mscmem->Common.TimerH, mscmem->Common.TimerL, mscmem->Common.Pad_a); mscspeedtab = mscspeedtab_turbo; } else { printf("msc%d: Normal version detected (%02x%02x:%d)\n", unit, mscmem->Common.TimerH, mscmem->Common.TimerL, mscmem->Common.Pad_a); mscspeedtab = mscspeedtab_normal; } mscmem->Common.CDStatus = 0; /* common status for all 7 ports */ /* XXX 8 is a constant */ for (Count = 0; Count < 8 && MSCSLOTUL(unit, Count) < MSCSLOTS; Count++) { msc = &mscdev[MSCSLOTUL(unit, Count)]; msc->board = mscmem; msc->port = Count; msc->flags = 0; msc->openflags = 0; msc->active = 1; msc->unit = unit; msc->closing = FALSE; msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count))] = NULL; msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count)) + 1] = NULL; } /* disable the non-existant eighth port */ if (MSCSLOTUL(unit, NUMLINES) < MSCSLOTS) mscdev[MSCSLOTUL(unit, NUMLINES)].active = 0; msc_vbl_node[unit].function = (void (*) (void *)) mscmint; msc_vbl_node[unit].data = (void *) unit; add_vbl_function (&msc_vbl_node[unit], MSC_VBL_PRIORITY, (void *)unit); return; } /* ARGSUSED */ int mscopen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { register struct tty *tp; struct mscdevice *msc; volatile struct mscstatus *ms; int error = 0; int s, slot, ttyn; /* get the device structure */ slot = MSCSLOT(dev); ttyn = MSCTTY(dev); if (slot >= MSCSLOTS) return ENXIO; if (MSCLINE(dev) >= NUMLINES) return ENXIO; msc = &mscdev[slot]; ms = &msc->board->Status[msc->port]; if (!msc->active) return ENXIO; /* * RFH: WHY here? Put down by while like other serial drivers * But if we do that it makes things bomb. */ s = spltty(); if (!msc_tty[ttyn]) { tp = ttymalloc(); tty_attach(tp); msc_tty[ttyn] = tp; msc_tty[ttyn+1] = (struct tty *)NULL; #if 0 /* default values are not optimal for this device, increase buffers. */ clfree(&tp->t_rawq); clfree(&tp->t_canq); clfree(&tp->t_outq); clalloc(&tp->t_rawq, 8192, 1); clalloc(&tp->t_canq, 8192, 1); clalloc(&tp->t_outq, 8192, 0); #endif } else tp = msc_tty[ttyn]; tp->t_oproc = (void (*) (struct tty *)) mscstart; tp->t_param = mscparam; tp->t_dev = dev; tp->t_hwiflow = mschwiflow; /* if port is still closing, just bitbucket remaining characters */ if (msc->closing) { ms->OutFlush = TRUE; msc->closing = FALSE; } /* initialize tty */ if ((tp->t_state & TS_ISOPEN) == 0) { tp->t_state |= TS_WOPEN; ttychars(tp); if (tp->t_ispeed == 0) { tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_cflag = TTYDEF_CFLAG; tp->t_lflag = TTYDEF_LFLAG; tp->t_ispeed = tp->t_ospeed = mscdefaultrate; } /* flags changed to be private to every unit by JM */ if (msc->openflags & TIOCFLAG_CLOCAL) tp->t_cflag |= CLOCAL; if (msc->openflags & TIOCFLAG_CRTSCTS) tp->t_cflag |= CRTSCTS; if (msc->openflags & TIOCFLAG_MDMBUF) tp->t_cflag |= MDMBUF; mscparam(tp, &tp->t_termios); ttsetwater(tp); (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMSET); if ((SWFLAGS(dev) & TIOCFLAG_SOFTCAR) || (mscmctl(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) { #if DEBUG_CD printf("msc%d: %d open nonblock\n", msc->unit, MSCLINE(dev)); #endif goto done; } /* * s = spltty(); * * This causes hangs when put here, like other TTY drivers do, rather than * above, WHY? RFH * */ while ((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0) { tp->t_state |= TS_WOPEN; #if DEBUG_CD printf("msc%d: %d waiting for CD\n", msc->unit, MSCLINE(dev)); #endif error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); if (error) { splx(s); return(error); } } #if DEBUG_CD printf("msc%d: %d got CD\n", msc->unit, MSCLINE(dev)); #endif 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)); } int mscclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { register struct tty *tp; int slot; volatile struct mscstatus *ms; struct mscdevice *msc; /* get the device structure */ slot = MSCSLOT(dev); if (slot >= MSCSLOTS) return ENXIO; msc = &mscdev[slot]; if (!msc->active) return ENXIO; ms = &msc->board->Status[msc->port]; tp = msc_tty[MSCTTY(dev)]; (*linesw[tp->t_line].l_close)(tp, flag); (void) mscmctl(dev, 0, DMSET); ttyclose(tp); if (msc->flags & TIOCM_DTR) msc->closing = TRUE; /* flush remaining characters before dropping DTR */ else ms->OutFlush = TRUE; /* just bitbucket remaining characters */ return (0); } int mscread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { register struct tty *tp; tp = msc_tty[MSCTTY(dev)]; if (! tp) return ENXIO; return((*linesw[tp->t_line].l_read)(tp, uio, flag)); } int mscwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { register struct tty *tp; tp = msc_tty[MSCTTY(dev)]; if (! tp) return ENXIO; return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); } /* * 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 in * to the tty layer. * * NOTE: MSCCDHACK is an invention of mine for dubious purposes. If you * want to activate it add * options MSCCDHACK * in the kernel conf file. Basically it forces CD->Low transitions * to ALWAYS send a signal to the process, even if the device is in * clocal mode or an outdial device. RFH */ void mscmint (data) register void *data; { register struct tty *tp; struct mscdevice *msc; volatile struct mscstatus *ms; volatile u_char *ibuf, *cbuf; unsigned char newhead; /* was int */ unsigned char bufpos; /* was int */ unsigned char ncd, ocd, ccd; int unit, slot, maxslot; int s, i; unit = (int) data; /* check each line on this board */ maxslot = MSCSLOTUL(unit, NUMLINES); if (maxslot > MSCSLOTS) maxslot = MSCSLOTS; msc = &mscdev[MSCSLOTUL(unit, 0)]; newhead = msc->board->Common.CDHead; bufpos = msc->board->Common.CDTail; if (newhead != bufpos) { /* CD events in queue */ /* set interrupt priority level */ s = spltty(); ocd = msc->board->Common.CDStatus; /* get old status bits */ while (newhead != bufpos) { /* read all events */ ncd = msc->board->CDBuf[bufpos++]; /* get one event */ ccd = ncd ^ ocd; /* mask of changed lines*/ ocd = ncd; /* save new status bits */ #if DEBUG_CD printf("ocd %02x ncd %02x ccd %02x\n", ocd, ncd, ccd); #endif for(i = 0; i < NUMLINES; i++) { /* do for all lines */ if (ccd & 1) { /* this one changed */ msc = &mscdev[MSCSLOTUL(unit, i)]; if (ncd & 1) { /* CD is now OFF */ #if DEBUG_CD printf("msc%d: CD OFF %d\n", unit, msc->port); #endif msc->flags &= ~TIOCM_CD; if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && (tp->t_state & (TS_ISOPEN | TS_WOPEN))) { #ifndef MSCCDHACK if (MSCDIALIN(tp->t_dev)) #endif { if ((*linesw[tp->t_line].l_modem)(tp, 0) == 0) { /* clear RTS and DTR, bitbucket output */ ms = &msc->board->Status[msc->port]; ms->Command = (ms->Command & ~MSCCMD_CMask) | MSCCMD_Close; ms->Setup = TRUE; msc->flags &= ~(TIOCM_DTR | TIOCM_RTS); ms->OutFlush = TRUE; } } } } else { /* CD is now ON */ #if DEBUG_CD printf("msc%d: CD ON %d\n", unit, msc->port); #endif msc->flags |= TIOCM_CD; if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && (tp->t_state & (TS_ISOPEN | TS_WOPEN))) { if (MSCDIALIN(tp->t_dev)) (*linesw[tp->t_line].l_modem)(tp, 1); } /* if tp valid and port open */ } /* CD on/off */ } /* if CD changed for this line */ ccd >>= 1; ncd >>= 1; /* bit for next line */ } /* for every line */ } /* while events in queue */ msc->board->Common.CDStatus = ocd; /* save new status */ msc->board->Common.CDTail = bufpos; /* remove events */ splx(s); } /* if events in CD queue */ for (slot = MSCSLOTUL(unit, 0); slot < maxslot; slot++) { msc = &mscdev[slot]; if (!msc->active) continue; tp = msc_tty[MSCTTYSLOT(slot)]; ms = &msc->board->Status[msc->port]; newhead = ms->InHead; /* 65c02 write pointer */ /* yoohoo, is the port open? */ if (tp && (tp->t_state & (TS_ISOPEN|TS_WOPEN))) { /* port is open, handle all type of events */ /* set interrupt priority level */ s = spltty(); /* check for input for this port */ if (newhead != (bufpos = ms->InTail)) { /* buffer for input chars/events */ ibuf = &msc->board->InBuf[msc->port][0]; /* data types of bytes in ibuf */ cbuf = &msc->board->InCtl[msc->port][0]; /* do for all chars, if room */ while (bufpos != newhead) { /* which type of input data? */ switch (cbuf[bufpos]) { /* input event (CD, BREAK, etc.) */ case MSCINCTL_EVENT: switch (ibuf[bufpos++]) { case MSCEVENT_Break: (*linesw[tp->t_line].l_rint)(TTY_FE, tp); break; default: printf("msc%d: unknown event type %d\n", msc->unit, ibuf[(bufpos-1)&0xff]); } /* event type switch */ break; case MSCINCTL_CHAR: if (tp->t_state & TS_TBLOCK) { goto NoRoomForYa; } (*linesw[tp->t_line].l_rint)((int)ibuf[bufpos++], tp); break; default: printf("msc%d: unknown data type %d\n", msc->unit, cbuf[bufpos]); bufpos++; } /* switch on input data type */ } /* while there's something in the buffer */ NoRoomForYa: ms->InTail = bufpos; /* tell 65C02 what we've read */ } /* if there was something in the buffer */ /* we get here only when the port is open */ /* send output */ if (tp->t_state & (TS_BUSY|TS_FLUSH)) { bufpos = ms->OutHead - ms->OutTail; /* busy and below low water mark? */ if (tp->t_state & TS_BUSY) { if (bufpos < IOBUFLOWWATER) { tp->t_state &= ~TS_BUSY; /* not busy any more */ if (tp->t_line) (*linesw[tp->t_line].l_start)(tp); else mscstart(tp); } } /* waiting for flush and buffer empty? */ if (tp->t_state & TS_FLUSH) { if (bufpos == 0) tp->t_state &= ~TS_FLUSH; /* finished flushing */ } } /* BUSY or FLUSH */ splx(s); } else { /* End of port open */ /* port is closed, don't pass on the chars from it */ /* check for input for this port */ if (newhead != (bufpos = ms->InTail)) { /* buffer for input chars/events */ ibuf = &msc->board->InBuf[msc->port][0]; /* data types of bytes in ibuf */ cbuf = &msc->board->InCtl[msc->port][0]; /* do for all chars, if room */ while (bufpos != newhead) { /* which type of input data? */ switch (cbuf[bufpos]) { /* input event (BREAK, etc.) */ case MSCINCTL_EVENT: switch (ibuf[bufpos++]) { default: printf("msc: unknown event type %d\n", ibuf[(bufpos-1)&0xff]); } /* event type switch */ break; default: bufpos++; } /* switch on input data type */ } /* while there's something in the buffer */ ms->InTail = bufpos; /* tell 65C02 what we've read */ } /* if there was something in the buffer */ } /* End of port open/close */ /* is this port closing? */ if (msc->closing) { /* if DTR is off, just bitbucket remaining characters */ if ( (msc->flags & TIOCM_DTR) == 0) { ms->OutFlush = TRUE; msc->closing = FALSE; } /* if output has drained, drop DTR */ else if (ms->OutHead == ms->OutTail) { (void) mscmctl(tp->t_dev, 0, DMSET); msc->closing = FALSE; } } } /* For all ports */ } int mscioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { register struct tty *tp; register int slot; register int error; struct mscdevice *msc; volatile struct mscstatus *ms; int s; /* get the device structure */ slot = MSCSLOT(dev); if (slot >= MSCSLOTS) return ENXIO; msc = &mscdev[slot]; if (!msc->active) return ENXIO; ms = &msc->board->Status[msc->port]; if (!(tp = msc_tty[MSCTTY(dev)])) 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) { /* send break */ case TIOCSBRK: s = spltty(); ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_Break; ms->Setup = TRUE; splx(s); break; /* clear break */ case TIOCCBRK: s = spltty(); ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_RTSOn; ms->Setup = TRUE; splx(s); break; case TIOCSDTR: (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIS); break; case TIOCCDTR: if (!MSCDIALIN(dev)) /* don't let dialins drop DTR */ (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIC); break; case TIOCMSET: (void) mscmctl(dev, *(int *)data, DMSET); break; case TIOCMBIS: (void) mscmctl(dev, *(int *)data, DMBIS); break; case TIOCMBIC: if (MSCDIALIN(dev)) /* don't let dialins drop DTR */ (void) mscmctl(dev, *(int *)data & TIOCM_DTR, DMBIC); else (void) mscmctl(dev, *(int *)data, DMBIC); break; case TIOCMGET: *(int *)data = mscmctl(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); msc->openflags = *(int *)data; /* only allow valid flags */ msc->openflags &= (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS); break; default: return (ENOTTY); } return (0); } int mscparam(tp, t) register struct tty *tp; register struct termios *t; { register int cflag = t->c_cflag; struct mscdevice *msc; volatile struct mscstatus *ms; int s, slot; int ospeed = ttspeedtab(t->c_ospeed, mscspeedtab); /* get the device structure */ slot = MSCSLOT(tp->t_dev); if (slot >= MSCSLOTS) return ENXIO; msc = &mscdev[slot]; if (!msc->active) return ENXIO; ms = &msc->board->Status[msc->port]; /* 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; /* hang up if baud is zero */ if (t->c_ospeed == 0) { if (!MSCDIALIN(tp->t_dev)) /* don't let dialins drop DTR */ (void) mscmctl(tp->t_dev, 0, DMSET); } else { /* set the baud rate */ s = spltty(); ms->Param = (ms->Param & ~MSCPARAM_BaudMask) | ospeed | MSCPARAM_RcvBaud; /* * Make sure any previous hangup is undone, ie. reenable DTR. * also mscmctl will cause the speed to be set */ (void) mscmctl (tp->t_dev, TIOCM_DTR | TIOCM_RTS, DMSET); splx(s); } return(0); } /* * Jukka's code initializes alot of stuff that other drivers don't * I'm including it here so that this code is a common set of work * done by both of us. rfh */ int mschwiflow(tp, flag) struct tty *tp; int flag; { /* Rob's version */ #if 1 if (flag) mscmctl( tp->t_dev, TIOCM_RTS, DMBIC); /* Clear/Lower RTS */ else mscmctl( tp->t_dev, TIOCM_RTS, DMBIS); /* Set/Raise RTS */ #else /* Jukka's version */ int s, slot; struct mscdevice *msc; volatile struct mscstatus *ms; /* get the device structure */ slot = MSCSLOT(tp->t_dev); if (slot >= MSCSLOTS) return ENXIO; msc = &mscdev[slot]; if (!msc->active) return ENXIO; ms = &msc->board->Status[msc->port]; /* Well, we should really _do_ something here, but the 65c02 code * manages the RTS signal on its own now, so... This will probably * change in the future. */ #endif return 1; } void mscstart(tp) register struct tty *tp; { register int cc; register char *cp; register int mhead; int s, slot; struct mscdevice *msc; volatile struct mscstatus *ms; volatile char *mob; int hiwat = 0; int maxout; if (! (tp->t_state & TS_ISOPEN)) return; slot = MSCSLOT(tp->t_dev); #if 0 printf("starting msc%d\n", slot); #endif s = spltty(); /* don't start if explicitly stopped */ if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP)) goto out; /* wake up if below low water */ 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); } /* don't bother if no characters or busy */ if (cc == 0 || (tp->t_state & TS_BUSY)) goto out; /* * Limit the amount of output we do in one burst */ msc = &mscdev[slot]; ms = &msc->board->Status[msc->port]; mhead = ms->OutHead; maxout = mhead - ms->OutTail; if (maxout < 0) maxout += IOBUFLEN; maxout = IOBUFLEN - 1 - maxout; if (cc >= maxout) { hiwat++; cc = maxout; } cc = q_to_b (&tp->t_outq, msc->tmpbuf, cc); if (cc > 0) { tp->t_state |= TS_BUSY; mob = &msc->board->OutBuf[msc->port][0]; cp = &msc->tmpbuf[0]; /* enable output */ ms->OutDisable = FALSE; #if 0 msc->tmpbuf[cc] = 0; printf("sending '%s'\n", msctmpbuf); #endif /* send the first char across to reduce latency */ mob[mhead++] = *cp++; mhead &= IOBUFLENMASK; ms->OutHead = mhead; cc--; /* copy the rest of the chars across quickly */ while (cc > 0) { mob[mhead++] = *cp++; mhead &= IOBUFLENMASK; cc--; } ms->OutHead = mhead; /* leave the device busy if we've filled the buffer */ if (!hiwat) tp->t_state &= ~TS_BUSY; } out: splx(s); } /* XXX */ /* * Stop output on a line. */ /*ARGSUSED*/ int mscstop(tp, flag) register struct tty *tp; int flag; /* defaulted to int anyway */ { register int s; #if 0 struct mscdevice *msc; volatile struct mscstatus *ms; #endif s = spltty(); if (tp->t_state & TS_BUSY) { if ((tp->t_state & TS_TTSTOP) == 0) { tp->t_state |= TS_FLUSH; #if 0 msc = &mscdev[MSCSLOT(tp->t_dev)]; ms = &msc->board->Status[msc->port]; printf("stopped output on msc%d\n", MSCSLOT(tp->t_dev)); ms->OutDisable = TRUE; #endif } } splx(s); return 0; } /* * bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR */ int mscmctl(dev, bits, how) dev_t dev; int bits, how; { struct mscdevice *msc; volatile struct mscstatus *ms; int slot; int s; u_char newcmd; int OldFlags; /* get the device structure */ slot = MSCSLOT(dev); if (slot >= MSCSLOTS) return ENXIO; msc = &mscdev[slot]; if (!msc->active) return ENXIO; s = spltty(); if (how != DMGET) { OldFlags = msc->flags; bits &= TIOCM_DTR | TIOCM_RTS; /* can only modify DTR and RTS */ switch (how) { case DMSET: msc->flags = (bits | (msc->flags & ~(TIOCM_DTR | TIOCM_RTS))); break; case DMBIC: msc->flags &= ~bits; break; case DMBIS: msc->flags |= bits; break; } /* modify modem control state */ ms = &msc->board->Status[msc->port]; if (msc->flags & TIOCM_RTS) /* was bits & */ newcmd = MSCCMD_RTSOn; else /* this doesn't actually work now */ newcmd = MSCCMD_RTSOff; if (msc->flags & TIOCM_DTR) /* was bits & */ newcmd |= MSCCMD_Enable; ms->Command = (ms->Command & (~MSCCMD_RTSMask & ~MSCCMD_Enable)) | newcmd; ms->Setup = TRUE; /* if we've dropped DTR, bitbucket any pending output */ if ( (OldFlags & TIOCM_DTR) && ((bits & TIOCM_DTR) == 0)) ms->OutFlush = TRUE; } bits = msc->flags; (void) splx(s); return(bits); } struct tty * msctty(dev) dev_t dev; { return(msc_tty[MSCTTY(dev)]); } /* * Load JM's freely redistributable A2232 6502c code. Let turbo detector * run for a while too. */ int mscinitcard(zap) struct zbus_args *zap; { int bcount; short start; u_char *from; volatile u_char *to; volatile struct mscmemory *mlm; mlm = (volatile struct mscmemory *)zap->va; (void)mlm->Enable6502Reset; /* copy the code across to the board */ to = (u_char *)mlm; from = msc6502code; bcount = sizeof(msc6502code) - 2; start = *(short *)from; from += sizeof(start); to += start; while(bcount--) *to++ = *from++; mlm->Common.Crystal = MSC_UNKNOWN; /* use automatic speed check */ /* start 6502 running */ (void)mlm->ResetBoard; /* wait until speed detector has finished */ for (bcount = 0; bcount < 200; bcount++) { delay(10000); if (mlm->Common.Crystal) break; } return(0); } #endif /* NMSC > 0 */