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

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/* $NetBSD: par.c,v 1.11 1994/12/01 17:25:33 chopps Exp $ */
/*
* 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.
*
* @(#)ppi.c 7.3 (Berkeley) 12/16/90
*/
/*
* parallel port interface
*/
#include "par.h"
#if NPAR > 0
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/uio.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/file.h>
#include <sys/systm.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/cia.h>
#include <amiga/dev/parioctl.h>
struct par_softc {
int sc_flags;
struct parparam sc_param;
#define sc_burst sc_param.burst
#define sc_timo sc_param.timo
#define sc_delay sc_param.delay
} *par_softcp;
#define getparsp(x) (x > 0 ? NULL : par_softcp)
/* sc_flags values */
#define PARF_ALIVE 0x01
#define PARF_OPEN 0x02
#define PARF_UIO 0x04
#define PARF_TIMO 0x08
#define PARF_DELAY 0x10
#define PARF_OREAD 0x40
#define PARF_OWRITE 0x80
#define UNIT(x) minor(x)
#ifdef DEBUG
int pardebug = 0;
#define PDB_FOLLOW 0x01
#define PDB_IO 0x02
#define PDB_INTERRUPT 0x04
#define PDB_NOCHECK 0x80
#endif
void partimo __P((void *));
void parstart __P((void *));
void parintr __P((void *));
void parattach __P((struct device *, struct device *, void *));
int parmatch __P((struct device *, struct cfdata *, void *));
struct cfdriver parcd = {
NULL, "par", (cfmatch_t)parmatch, parattach, DV_DULL,
sizeof(struct device), NULL, 0 };
/*ARGSUSED*/
int
parmatch(pdp, cfp, auxp)
struct device *pdp;
struct cfdata *cfp;
void *auxp;
{
if (matchname((char *)auxp, "par") && cfp->cf_unit == 0)
return(1);
return(0);
}
void
parattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
par_softcp = (struct par_softc *)dp;
#ifdef DEBUG
if ((pardebug & PDB_NOCHECK) == 0)
#endif
par_softcp->sc_flags = PARF_ALIVE;
printf("\n");
}
paropen(dev, flags)
dev_t dev;
{
int unit = UNIT(dev);
struct par_softc *sc = getparsp(unit);
if (unit >= NPAR || (sc->sc_flags & PARF_ALIVE) == 0)
return(ENXIO);
#ifdef DEBUG
if (pardebug & PDB_FOLLOW) {
printf("paropen(%x, %x): flags %x, ",
dev, flags, sc->sc_flags);
printf ("port = $%x\n", ((ciab.pra ^ CIAB_PRA_SEL)
& (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT)));
}
#endif
if (sc->sc_flags & PARF_OPEN)
return(EBUSY);
/* can either read or write, but not both */
if ((flags & (FREAD|FWRITE)) == (FREAD|FWRITE))
return EINVAL;
sc->sc_flags |= PARF_OPEN;
if (flags & FREAD)
sc->sc_flags |= PARF_OREAD;
else
sc->sc_flags |= PARF_OWRITE;
sc->sc_burst = PAR_BURST;
sc->sc_timo = parmstohz(PAR_TIMO);
sc->sc_delay = parmstohz(PAR_DELAY);
/* enable interrupts for CIAA-FLG */
ciaa.icr = CIA_ICR_IR_SC | CIA_ICR_FLG;
return(0);
}
parclose(dev, flags)
dev_t dev;
{
int unit = UNIT(dev);
struct par_softc *sc = getparsp(unit);
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("parclose(%x, %x): flags %x\n",
dev, flags, sc->sc_flags);
#endif
sc->sc_flags &= ~(PARF_OPEN|PARF_OREAD|PARF_OWRITE);
/* don't allow interrupts for CIAA-FLG any longer */
ciaa.icr = CIA_ICR_FLG;
return(0);
}
void
parstart(arg)
void *arg;
{
struct par_softc *sc;
int unit;
unit = (int)arg;
sc = getparsp(unit);
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("parstart(%x)\n", unit);
#endif
sc->sc_flags &= ~PARF_DELAY;
wakeup(sc);
}
void
partimo(arg)
void *arg;
{
struct par_softc *sc;
int unit;
unit = (int) arg;
sc = getparsp(unit);
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("partimo(%x)\n", unit);
#endif
sc->sc_flags &= ~(PARF_UIO|PARF_TIMO);
wakeup(sc);
}
parread(dev, uio)
dev_t dev;
struct uio *uio;
{
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("parread(%x, %x)\n", dev, uio);
#endif
return (parrw(dev, uio));
}
parwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("parwrite(%x, %x)\n", dev, uio);
#endif
return (parrw(dev, uio));
}
parrw(dev, uio)
dev_t dev;
register struct uio *uio;
{
int unit = UNIT(dev);
register struct par_softc *sc = getparsp(unit);
register int s, len, cnt;
register char *cp;
int error = 0, gotdata = 0;
int buflen;
char *buf;
if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ))
return EINVAL;
if (uio->uio_resid == 0)
return(0);
#ifdef DEBUG
if (pardebug & (PDB_FOLLOW|PDB_IO))
printf("parrw(%x, %x, %c): burst %d, timo %d, resid %x\n",
dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W',
sc->sc_burst, sc->sc_timo, uio->uio_resid);
#endif
buflen = min(sc->sc_burst, uio->uio_resid);
buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK);
sc->sc_flags |= PARF_UIO;
if (sc->sc_timo > 0)
{
sc->sc_flags |= PARF_TIMO;
timeout(partimo, (void *)unit, sc->sc_timo);
}
while (uio->uio_resid > 0)
{
len = min(buflen, uio->uio_resid);
cp = buf;
if (uio->uio_rw == UIO_WRITE)
{
error = uiomove(cp, len, uio);
if (error)
break;
}
again:
s = splbio();
#if 0
if ((sc->sc_flags & PARF_UIO) && hpibreq(&sc->sc_dq) == 0)
sleep(sc, PRIBIO+1);
#endif
/*
* Check if we timed out during sleep or uiomove
*/
(void) splsoftclock();
if ((sc->sc_flags & PARF_UIO) == 0)
{
#ifdef DEBUG
if (pardebug & PDB_IO)
printf("parrw: uiomove/sleep timo, flags %x\n",
sc->sc_flags);
#endif
if (sc->sc_flags & PARF_TIMO)
{
untimeout(partimo, (void *)unit);
sc->sc_flags &= ~PARF_TIMO;
}
splx(s);
break;
}
splx(s);
/*
* Perform the operation
*/
if (uio->uio_rw == UIO_WRITE)
cnt = parsend (cp, len);
else
cnt = parreceive (cp, len);
if (cnt < 0)
{
error = -cnt;
break;
}
s = splbio();
#if 0
hpibfree(&sc->sc_dq);
#endif
#ifdef DEBUG
if (pardebug & PDB_IO)
printf("parrw: %s(%x, %d) -> %d\n",
uio->uio_rw == UIO_READ ? "recv" : "send", cp, len, cnt);
#endif
splx(s);
if (uio->uio_rw == UIO_READ)
{
if (cnt)
{
error = uiomove(cp, cnt, uio);
if (error)
break;
gotdata++;
}
/*
* Didn't get anything this time, but did in the past.
* Consider us done.
*/
else if (gotdata)
break;
}
s = splsoftclock();
/*
* Operation timeout (or non-blocking), quit now.
*/
if ((sc->sc_flags & PARF_UIO) == 0)
{
#ifdef DEBUG
if (pardebug & PDB_IO)
printf("parrw: timeout/done\n");
#endif
splx(s);
break;
}
/*
* Implement inter-read delay
*/
if (sc->sc_delay > 0)
{
sc->sc_flags |= PARF_DELAY;
timeout(parstart, (void *)unit, sc->sc_delay);
error = tsleep(sc, PCATCH|PZERO-1, "par-cdelay", 0);
if (error)
{
splx(s);
break;
}
}
splx(s);
/*
* Must not call uiomove again til we've used all data
* that we already grabbed.
*/
if (uio->uio_rw == UIO_WRITE && cnt != len)
{
cp += cnt;
len -= cnt;
cnt = 0;
goto again;
}
}
s = splsoftclock();
if (sc->sc_flags & PARF_TIMO)
{
untimeout(partimo, (void *)unit);
sc->sc_flags &= ~PARF_TIMO;
}
if (sc->sc_flags & PARF_DELAY)
{
untimeout(parstart, (void *)unit);
sc->sc_flags &= ~PARF_DELAY;
}
splx(s);
/*
* Adjust for those chars that we uiomove'ed but never wrote
*/
if (uio->uio_rw == UIO_WRITE && cnt != len)
{
uio->uio_resid += (len - cnt);
#ifdef DEBUG
if (pardebug & PDB_IO)
printf("parrw: short write, adjust by %d\n",
len-cnt);
#endif
}
free(buf, M_DEVBUF);
#ifdef DEBUG
if (pardebug & (PDB_FOLLOW|PDB_IO))
printf("parrw: return %d, resid %d\n", error, uio->uio_resid);
#endif
return (error);
}
int
parioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct par_softc *sc = getparsp(UNIT(dev));
struct parparam *pp, *upp;
int error = 0;
switch (cmd)
{
case PARIOCGPARAM:
pp = &sc->sc_param;
upp = (struct parparam *)data;
upp->burst = pp->burst;
upp->timo = parhztoms(pp->timo);
upp->delay = parhztoms(pp->delay);
break;
case PARIOCSPARAM:
pp = &sc->sc_param;
upp = (struct parparam *)data;
if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX ||
upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX)
return(EINVAL);
pp->burst = upp->burst;
pp->timo = parmstohz(upp->timo);
pp->delay = parmstohz(upp->delay);
break;
default:
return(EINVAL);
}
return (error);
}
int
parhztoms(h)
int h;
{
extern int hz;
register int m = h;
if (m > 0)
m = m * 1000 / hz;
return(m);
}
int
parmstohz(m)
int m;
{
extern int hz;
register int h = m;
if (h > 0) {
h = h * hz / 1000;
if (h == 0)
h = 1000 / hz;
}
return(h);
}
/* stuff below here if for interrupt driven output of data thru
the parallel port. */
int partimeout_pending;
int parsend_pending;
void
parintr(arg)
void *arg;
{
int s, mask;
mask = (int)arg;
s = splclock();
#ifdef DEBUG
if (pardebug & PDB_INTERRUPT)
printf("parintr %s\n", mask ? "FLG" : "tout");
#endif
/*
* if invoked from timeout handler, mask will be 0,
* if from interrupt, it will contain the cia-icr mask,
* which is != 0
*/
if (mask) {
if (partimeout_pending)
untimeout(parintr, 0);
if (parsend_pending)
parsend_pending = 0;
}
/* either way, there won't be a timeout pending any longer */
partimeout_pending = 0;
wakeup(parintr);
splx(s);
}
int
parsendch (ch)
u_char ch;
{
int error = 0;
int s;
/* if either offline, busy or out of paper, wait for that
condition to clear */
s = splclock();
while (!error
&& (parsend_pending
|| ((ciab.pra ^ CIAB_PRA_SEL)
& (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT))))
{
extern int hz;
#ifdef DEBUG
if (pardebug & PDB_INTERRUPT)
printf ("parsendch, port = $%x\n",
((ciab.pra ^ CIAB_PRA_SEL)
& (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT)));
#endif
/* wait a second, and try again */
timeout(parintr, 0, hz);
partimeout_pending = 1;
/* this is essentially a flipflop to have us wait for the
first character being transmitted when trying to transmit
the second, etc. */
parsend_pending = 0;
/* it's quite important that a parallel putc can be
interrupted, given the possibility to lock a printer
in an offline condition.. */
if (error = tsleep(parintr, PCATCH|PZERO-1, "parsendch", 0))
{
#ifdef DEBUG
if (pardebug & PDB_INTERRUPT)
printf ("parsendch interrupted, error = %d\n", error);
#endif
if (partimeout_pending)
untimeout(parintr, 0);
partimeout_pending = 0;
}
}
if (! error)
{
#ifdef DEBUG
if (pardebug & PDB_INTERRUPT)
printf ("#%d", ch);
#endif
ciaa.prb = ch;
parsend_pending = 1;
}
splx (s);
return error;
}
int
parsend (buf, len)
u_char *buf;
int len;
{
int err, orig_len = len;
/* make sure I/O lines are setup right for output */
/* control lines set to input */
ciab.ddra &= ~(CIAB_PRA_SEL|CIAB_PRA_POUT|CIAB_PRA_BUSY);
/* data lines to output */
ciaa.ddrb = 0xff;
for (; len; len--, buf++)
if (err = parsendch (*buf))
return err < 0 ? -EINTR : -err;
/* either all or nothing.. */
return orig_len;
}
int
parreceive (buf, len)
u_char *buf;
int len;
{
/* oh deary me, something's gotta be left to be implemented
later... */
return 0;
}
#endif
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