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NetBSD/sys/arch/amiga/dev/msc.c

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/* $NetBSD: msc.c,v 1.7 1996/06/06 04:47:34 mhitch Exp $ */
/*
* Copyright (c) 1993 Zik.
* Copyright (c) 1995 Jukka Marin <jmarin@teeri.jmp.fi>.
* Copyright (c) 1995 Timo Rossi <trossi@jyu.fi>.
* Copyright (c) 1995 Rob Healey <rhealey@kas.helios.mn.org>.
* 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 <jmarin@jmp.fi> and
* Timo Rossi <trossi@jyu.fi> The mscmint() code is Jukka's. 950916
* Integrated more bug fixes by Jukka Marin <jmarin@jmp.fi> 950918
* Also added Jukka's turbo board code. 950918
* - Reformatted to NetBSD style format.
*/
#include "msc.h"
#if NMSC > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <amiga/amiga/device.h>
#include <amiga/dev/zbusvar.h>
#include <amiga/dev/mscreg.h>
#include <machine/cpu.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cia.h>
#include <amiga/amiga/cc.h>
#include <sys/conf.h>
#include <machine/conf.h>
/* 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_MSC 0
#define DEBUG_CD 0
struct cfattach msc_ca = {
sizeof(struct device), mscmatch, mscattach
};
struct cfdriver msc_cd = {
NULL, "msc",DV_TTY, NULL, 0
};
#if DEBUG_MSC
void
bugi(msc, string)
struct mscdevice *msc;
char *string;
{
volatile struct mscstatus *ms;
volatile struct mscmemory *mscmem;
mscmem = msc->board;
ms = &mscmem->Status[msc->port];
printf("msc %s u%d f%08lx F%08lx\n", string, msc->port, msc->flags,
msc->openflags);
printf("msc h%d t%d H%d t%d p%02x c%02x CD%02x\n", ms->InHead,
ms->InTail, ms->OutHead, ms->OutTail, ms->Param, ms->Command,
ms->chCD);
printf("msc a%02x b%02x c%02x\n", ms->Pad_a, ms->Pad_b, ms->Padc);
return
}
#endif
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;
if (mscinitcard(zap) != 0) {
printf("\nmsc%d: Board initialize failed, bad download code.\n", unit);
return;
}
printf("\nmsc%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;
}
/* 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->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;
int error = 0;
int s;
int slot;
int ttyn;
struct mscdevice *msc;
volatile struct mscstatus *ms;
/* 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)
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 %ld waiting for CD\n", MSCLINE(dev));
#endif
error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, ttopen, 0);
if (error) {
splx(s);
return(error);
}
}
done:
#if DEBUG_CD
printf("msc %ld waiting for CD\n", MSCLINE(dev));
#endif
/* 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];
#if DEBUG_MSC
bugi(msc, "close1");
#endif
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 */
#if DEBUG_MSC
bugi(msc, "close2");
#endif
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;
{
int unit;
register struct tty *tp;
int slot;
int maxslot;
struct mscdevice *msc;
volatile struct mscstatus *ms;
volatile u_char *ibuf, *cbuf;
unsigned char newhead; /* was int */
unsigned char bufpos; /* was int */
int s;
unit = (int) data;
/* check each line on this board */
maxslot = MSCSLOTUL(unit, NUMLINES);
if (maxslot > MSCSLOTS)
maxslot = MSCSLOTS;
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))
{
#if DEBUG_MSC
printf("iop%d\n",slot);
#endif
/* 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++])
{
/* carrier detect change OFF -> ON */
case MSCEVENT_CarrierOn:
#if DEBUG_CD
printf("msc CD ON %d\n", msc->port);
#endif
msc->flags |= TIOCM_CD;
if (MSCDIALIN(tp->t_dev))
(*linesw[tp->t_line].l_modem)(tp, 1);
break;
/* carrier detect change ON -> OFF */
case MSCEVENT_CarrierOff:
#if DEBUG_CD
printf("msc CD OFF %d\n", msc->port);
#endif
msc->flags &= ~TIOCM_CD;
#ifndef MSCCDHACK
if (MSCDIALIN(tp->t_dev))
#endif /* Note to format police: Don't merge the { below
in to the line above! */
{
if ((*linesw[tp->t_line].l_modem)(tp, 0) == 0)
{
/* clear RTS and DTR, bitbucket output */
ms->Command = (ms->Command & ~MSCCMD_CMask) | MSCCMD_Close;
ms->Setup = TRUE;
msc->flags &= ~(TIOCM_DTR | TIOCM_RTS);
ms->OutFlush = TRUE;
}
}
break;
case MSCEVENT_Break:
#if DEBUG_MSC
printf("Break received on msc%d\n", slot);
#endif
(*linesw[tp->t_line].l_rint)(TTY_FE, tp);
break;
default:
printf("msc: unknown event type %d\n",
ibuf[(bufpos-1)&0xff]);
} /* event type switch */
break;
case MSCINCTL_CHAR:
if (tp->t_state & TS_TBLOCK) {
if (ms->chCD) {
/* Carrier detect ON -> OFF */
#if DEBUG_CD
printf("msc CD OFF blocked %d msc->flags %08lx\n",
msc->port, msc->flags);
#endif
msc->flags &= ~TIOCM_CD;
#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->Command = (ms->Command & ~MSCCMD_CMask) |
MSCCMD_Close;
ms->Setup = TRUE;
msc->flags &= ~(TIOCM_DTR | TIOCM_RTS);
ms->OutFlush = TRUE;
}
}
}
goto NoRoomForYa;
}
#if DEBUG_MSC
printf("'%c' ",ibuf[bufpos]);
#endif
(*linesw[tp->t_line].l_rint)((int)ibuf[bufpos++], tp);
break;
default:
printf("msc: unknown data type %d\n", 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))
{
#if DEBUG_MSC
printf("icp%d\n",slot);
#endif
/* 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++])
{
/* carrier detect change OFF -> ON */
case MSCEVENT_CarrierOn:
#if DEBUG_CD
printf("msc CD ON %d (closed)\n", msc->port);
#endif
msc->flags |= TIOCM_CD;
break;
/* carrier detect change ON -> OFF */
case MSCEVENT_CarrierOff:
#if DEBUG_CD
printf("msc CD OFF %d (closed)\n", msc->port);
#endif
msc->flags &= ~TIOCM_CD;
#ifndef MSCCDHACK
if (tp && MSCDIALIN(tp->t_dev))
#else
if (tp )
#endif
{
if ((*linesw[tp->t_line].l_modem)(tp, 0) == 0)
{
/* clear RTS and DTR, bitbucket output */
ms->Command = (ms->Command & ~MSCCMD_CMask) | MSCCMD_Close;
ms->Setup = TRUE;
msc->flags &= ~(TIOCM_DTR | TIOCM_RTS);
ms->OutFlush = TRUE;
}
}
break;
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;
int slot;
struct mscdevice *msc;
volatile struct mscstatus *ms;
int s;
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];
#if DEBUG_MSC
bugi(msc, "param1");
#endif
/* 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);
}
#if DEBUG_MSC
bugi(msc, "param2");
#endif
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 DEBUG_MSC
printf("mschwiflow %d\n", flag);
#endif
if (flag)
mscmctl( tp->t_dev, TIOCM_RTS, DMBIC); /* Clear/Lower RTS */
else
mscmctl( tp->t_dev, TIOCM_RTS, DMBIS); /* Set/Raise RTS */
#endif
/* Jukka's version */
#if 0
int slot;
struct mscdevice *msc;
volatile struct mscstatus *ms;
int s;
/* 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];
#if DEBUG_MSC
bugi(msc, "hwiflow");
#endif
/* 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;
int 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;
#if DEBUG_MSC
bugi(msc, "mctl1");
#endif
s = spltty(); /* Jukka wants spl6() here, WHY?!! RFH */
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;
}
#if DEBUG_MSC
bugi(msc, "mctl2");
#endif
/* 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);
#if DEBUG_MSC
bugi(msc, "mctl3");
#endif
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;
#if DEBUG_MSC
printf("\n** copying %ld bytes from %08lx to %08lx (start=%04lx)\n",
(unsigned long)bcount, (unsigned long)from, to, start);
printf("First byte to copy is %02lx\n", *from);
#endif
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 */
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