NetBSD/sys/arch/mvme68k/dev/lpt_pcc.c

264 lines
6.2 KiB
C

/* $NetBSD: lpt_pcc.c,v 1.3 2000/03/18 22:33:03 scw Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Steve C. Woodford.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Device Driver back-end for the MVME147's parallel printer port
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <machine/bus.h>
#include <mvme68k/dev/lptvar.h>
#include <mvme68k/dev/lpt_pccreg.h>
#include <mvme68k/dev/pccreg.h>
#include <mvme68k/dev/pccvar.h>
static int lpt_pcc_intr __P((void *));
static void lpt_pcc_open __P((struct lpt_softc *, int));
static void lpt_pcc_close __P((struct lpt_softc *));
static void lpt_pcc_iprime __P((struct lpt_softc *));
static void lpt_pcc_speed __P((struct lpt_softc *, int));
static int lpt_pcc_notrdy __P((struct lpt_softc *, int));
static void lpt_pcc_wr_data __P((struct lpt_softc *, u_char));
struct lpt_funcs lpt_pcc_funcs = {
lpt_pcc_open,
lpt_pcc_close,
lpt_pcc_iprime,
lpt_pcc_speed,
lpt_pcc_notrdy,
lpt_pcc_wr_data
};
/*
* Autoconfig stuff
*/
static int lpt_pcc_match __P((struct device *, struct cfdata *, void *));
static void lpt_pcc_attach __P((struct device *, struct device *, void *));
struct cfattach lpt_pcc_ca = {
sizeof(struct lpt_softc), lpt_pcc_match, lpt_pcc_attach
};
extern struct cfdriver lpt_cd;
/*ARGSUSED*/
static int
lpt_pcc_match(parent, cf, args)
struct device *parent;
struct cfdata *cf;
void *args;
{
struct pcc_attach_args *pa;
pa = args;
if (strcmp(pa->pa_name, lpt_cd.cd_name))
return (0);
pa->pa_ipl = cf->pcccf_ipl;
return (1);
}
/*ARGSUSED*/
static void
lpt_pcc_attach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct lpt_softc *sc;
struct pcc_attach_args *pa;
sc = (struct lpt_softc *) self;
pa = args;
sc->sc_bust = pa->pa_bust;
bus_space_map(pa->pa_bust, pa->pa_offset, LPREG_SIZE, 0, &sc->sc_bush);
sc->sc_ipl = pa->pa_ipl & PCC_IMASK;
sc->sc_funcs = &lpt_pcc_funcs;
sc->sc_laststatus = 0;
printf(": PCC Parallel Printer\n");
/*
* Disable interrupts until device is opened
*/
pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, 0);
/*
* Main attachment code
*/
lpt_attach_subr(sc);
/*
* Hook into the printer interrupt
*/
pccintr_establish(PCCV_PRINTER, lpt_pcc_intr, sc->sc_ipl, sc);
}
/*
* Handle printer interrupts which occur when the printer is ready to accept
* another char.
*/
int
lpt_pcc_intr(arg)
void *arg;
{
struct lpt_softc *sc;
int i;
sc = arg;
/* is printer online and ready for output */
if (lpt_pcc_notrdy(sc, 0) && lpt_pcc_notrdy(sc, 1))
return 0;
i = lpt_intr(sc);
if (pcc_reg_read(sys_pcc, PCCREG_PRNT_INTR_CTRL) & LPI_ACKINT) {
pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL,
sc->sc_icr | LPI_ACKINT);
}
return (i);
}
static void
lpt_pcc_open(sc, int_ena)
struct lpt_softc *sc;
int int_ena;
{
int sps;
pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL,
LPI_ACKINT | LPI_FAULTINT);
if (int_ena == 0) {
sps = splhigh();
sc->sc_icr = sc->sc_ipl | LPI_ENABLE;
pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, sc->sc_icr);
splx(sps);
}
}
static void
lpt_pcc_close(sc)
struct lpt_softc *sc;
{
pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, 0);
sc->sc_icr = sc->sc_ipl;
pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, sc->sc_icr);
}
/* ARGSUSED */
static void
lpt_pcc_iprime(sc)
struct lpt_softc *sc;
{
lpt_control_write(LPC_INPUT_PRIME);
delay(100);
}
/* ARGSUSED */
static void
lpt_pcc_speed(sc, speed)
struct lpt_softc *sc;
int speed;
{
if (speed == LPT_STROBE_FAST)
lpt_control_write(LPC_FAST_STROBE);
else
lpt_control_write(0);
}
static int
lpt_pcc_notrdy(sc, err)
struct lpt_softc *sc;
int err;
{
u_char status;
u_char new;
#define LPS_INVERT (LPS_SELECT)
#define LPS_MASK (LPS_SELECT|LPS_FAULT|LPS_BUSY|LPS_PAPER_EMPTY)
status = (lpt_status_read(sc) ^ LPS_INVERT) & LPS_MASK;
if (err) {
new = status & ~sc->sc_laststatus;
sc->sc_laststatus = status;
if (new & LPS_SELECT)
log(LOG_NOTICE, "%s: offline\n",
sc->sc_dev.dv_xname);
else if (new & LPS_PAPER_EMPTY)
log(LOG_NOTICE, "%s: out of paper\n",
sc->sc_dev.dv_xname);
else if (new & LPS_FAULT)
log(LOG_NOTICE, "%s: output error\n",
sc->sc_dev.dv_xname);
}
pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL,
sc->sc_icr | LPI_FAULTINT);
return (status);
}
static void
lpt_pcc_wr_data(sc, data)
struct lpt_softc *sc;
u_char data;
{
lpt_data_write(sc, data);
}