NetBSD-5.0.2/sys/arch/x68k/dev/par.c
/* $NetBSD: par.c,v 1.37 2008/06/25 08:14:59 isaki 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. 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: par.c,v 1.37 2008/06/25 08:14:59 isaki Exp $");
#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 <sys/callout.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/parioctl.h>
#include <arch/x68k/dev/intiovar.h>
struct par_softc {
device_t sc_dev;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
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
struct callout sc_timo_ch;
struct callout sc_start_ch;
} ;
/* par registers */
#define PAR_DATA 1
#define PAR_STROBE 3
/* 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 /* no support */
#define PARF_OWRITE 0x80
void partimo(void *);
void parstart(void *);
void parintr(void *);
int parrw(dev_t, struct uio *);
int parhztoms(int);
int parmstohz(int);
int parsendch(struct par_softc *, u_char);
int parsend(struct par_softc *, u_char *, int);
static struct callout intr_callout;
#define UNIT(x) minor(x)
#ifdef DEBUG
#define PDB_FOLLOW 0x01
#define PDB_IO 0x02
#define PDB_INTERRUPT 0x04
#define PDB_NOCHECK 0x80
#ifdef PARDEBUG
int pardebug = PDB_FOLLOW | PDB_IO | PDB_INTERRUPT;
#else
int pardebug = 0;
#endif
#endif
int parmatch(device_t, cfdata_t, void *);
void parattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(par, sizeof(struct par_softc),
parmatch, parattach, NULL, NULL);
extern struct cfdriver par_cd;
static int par_attached;
dev_type_open(paropen);
dev_type_close(parclose);
dev_type_write(parwrite);
dev_type_ioctl(parioctl);
const struct cdevsw par_cdevsw = {
paropen, parclose, noread, parwrite, parioctl,
nostop, notty, nopoll, nommap, nokqfilter,
};
int
parmatch(device_t pdp, cfdata_t cfp, void *aux)
{
struct intio_attach_args *ia = aux;
/* X680x0 has only one parallel port */
if (strcmp(ia->ia_name, "par") || par_attached)
return 0;
if (ia->ia_addr == INTIOCF_ADDR_DEFAULT)
ia->ia_addr = 0xe8c000;
ia->ia_size = 0x2000;
if (intio_map_allocate_region(pdp, ia, INTIO_MAP_TESTONLY))
return 0;
if (ia->ia_intr == INTIOCF_INTR_DEFAULT)
ia->ia_intr = 99;
#if DIAGNOSTIC
if (ia->ia_intr != 99)
return 0;
#endif
return 1;
}
void
parattach(device_t pdp, device_t dp, void *aux)
{
struct par_softc *sc = device_private(dp);
struct intio_attach_args *ia = aux;
int r;
par_attached = 1;
sc->sc_dev = dp;
sc->sc_flags = PARF_ALIVE;
aprint_normal(": parallel port (write only, interrupt)\n");
ia->ia_size = 0x2000;
r = intio_map_allocate_region(pdp, ia, INTIO_MAP_ALLOCATE);
#ifdef DIAGNOSTIC
if (r)
panic("IO map for PAR corruption??");
#endif
sc->sc_bst = ia->ia_bst;
r = bus_space_map(sc->sc_bst,
ia->ia_addr, ia->ia_size,
BUS_SPACE_MAP_SHIFTED,
&sc->sc_bsh);
#ifdef DIAGNOSTIC
if (r)
panic("Cannot map IO space for PAR.");
#endif
intio_set_sicilian_intr(intio_get_sicilian_intr() &
~SICILIAN_INTR_PAR);
intio_intr_establish(ia->ia_intr, "par",
(intio_intr_handler_t)parintr, (void *)1);
callout_init(&sc->sc_timo_ch, 0);
callout_init(&sc->sc_start_ch, 0);
callout_init(&intr_callout, 0);
}
int
paropen(dev_t dev, int flags, int mode, struct lwp *l)
{
int unit = UNIT(dev);
struct par_softc *sc;
sc = device_lookup_private(&par_cd, unit);
if (sc == NULL || !(sc->sc_flags & PARF_ALIVE))
return(ENXIO);
if (sc->sc_flags & PARF_OPEN)
return(EBUSY);
/* X680x0 can't read */
if ((flags & FREAD) == FREAD)
return (EINVAL);
sc->sc_flags |= PARF_OPEN;
sc->sc_flags |= PARF_OWRITE;
sc->sc_burst = PAR_BURST;
sc->sc_timo = parmstohz(PAR_TIMO);
sc->sc_delay = parmstohz(PAR_DELAY);
return(0);
}
int
parclose(dev_t dev, int flags, int mode, struct lwp *l)
{
int unit = UNIT(dev);
int s;
struct par_softc *sc = device_lookup_private(&par_cd, unit);
sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE);
/* don't allow interrupts any longer */
s = spl1();
intio_set_sicilian_intr(intio_get_sicilian_intr() &
~SICILIAN_INTR_PAR);
splx(s);
return (0);
}
void
parstart(void *arg)
{
struct par_softc *sc = arg;
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("parstart(%x)\n", device_unit(sc->sc_dev));
#endif
sc->sc_flags &= ~PARF_DELAY;
wakeup(sc);
}
void
partimo(void *arg)
{
struct par_softc *sc = arg;
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("partimo(%x)\n", device_unit(sc->sc_dev));
#endif
sc->sc_flags &= ~(PARF_UIO|PARF_TIMO);
wakeup(sc);
}
int
parwrite(dev_t dev, struct uio *uio, int flag)
{
#ifdef DEBUG
if (pardebug & PDB_FOLLOW)
printf("parwrite(%x, %p)\n", dev, uio);
#endif
return (parrw(dev, uio));
}
int
parrw(dev_t dev, struct uio *uio)
{
int unit = UNIT(dev);
struct par_softc *sc = device_lookup_private(&par_cd, unit);
int len=0xdeadbeef; /* XXX: shutup gcc */
int s, cnt=0;
char *cp;
int error = 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);
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;
callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc);
}
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 = splsoftclock();
/*
* Check if we timed out during sleep or uiomove
*/
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) {
callout_stop(&sc->sc_timo_ch);
sc->sc_flags &= ~PARF_TIMO;
}
splx(s);
break;
}
splx(s);
/*
* Perform the operation
*/
cnt = parsend(sc, cp, len);
if (cnt < 0) {
error = -cnt;
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;
callout_reset(&sc->sc_start_ch, sc->sc_delay,
parstart, sc);
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) {
callout_stop(&sc->sc_timo_ch);
sc->sc_flags &= ~PARF_TIMO;
}
if (sc->sc_flags & PARF_DELAY) {
callout_stop(&sc->sc_start_ch);
sc->sc_flags &= ~PARF_DELAY;
}
splx(s);
/*
* Adjust for those chars that we uiomove'ed but never wrote
*/
/*
* XXXjdolecek: this len usage is wrong, this will be incorrect
* if the transfer size is longer than sc_burst
*/
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_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
struct par_softc *sc = device_lookup_private(&par_cd, 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(int h)
{
int m = h;
if (m > 0)
m = m * 1000 / hz;
return(m);
}
int
parmstohz(int m)
{
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(void *arg)
{
int s, mask;
mask = (int)arg;
s = splclock();
intio_set_sicilian_intr(intio_get_sicilian_intr() &
~SICILIAN_INTR_PAR);
#ifdef DEBUG
if (pardebug & PDB_INTERRUPT)
printf("parintr %d(%s)\n", mask, 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)
callout_stop(&intr_callout);
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(struct par_softc *sc, u_char ch)
{
int error = 0;
int s;
/* if either offline, busy or out of paper, wait for that
condition to clear */
s = spl1();
while (!error
&& (parsend_pending
|| !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR)))
{
/* wait a second, and try again */
callout_reset(&intr_callout, hz, parintr, 0);
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)
callout_stop(&intr_callout);
partimeout_pending = 0;
}
}
if (!error) {
#ifdef DEBUG
if (pardebug & PDB_INTERRUPT)
printf("#%d", ch);
#endif
bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_DATA, ch);
DELAY(1); /* (DELAY(1) == 1us) > 0.5us */
bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0);
intio_set_sicilian_intr(intio_get_sicilian_intr() |
SICILIAN_INTR_PAR);
DELAY(1);
bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1);
parsend_pending = 1;
}
splx(s);
return error;
}
int
parsend(struct par_softc *sc, u_char *buf, int len)
{
int err, orig_len = len;
for (; len; len--, buf++)
if ((err = parsendch(sc, *buf)))
return err < 0 ? -EINTR : -err;
/* either all or nothing.. */
return orig_len;
}