258 lines
6.1 KiB
C
258 lines
6.1 KiB
C
/* $NetBSD: lpt_pcc.c,v 1.2 1999/02/14 17:54:28 scw Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Steve C. Woodford.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Device Driver back-end for the MVME147's parallel printer port
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/buf.h>
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#include <sys/kernel.h>
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#include <sys/ioctl.h>
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#include <sys/uio.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/syslog.h>
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#include <machine/cpu.h>
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#include <mvme68k/dev/lptvar.h>
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#include <mvme68k/dev/lpt_pccreg.h>
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#include <mvme68k/dev/pccreg.h>
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#include <mvme68k/dev/pccvar.h>
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static int lpt_pcc_intr __P((void *));
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static void lpt_pcc_open __P((struct lpt_softc *, int));
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static void lpt_pcc_close __P((struct lpt_softc *));
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static void lpt_pcc_iprime __P((struct lpt_softc *));
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static void lpt_pcc_speed __P((struct lpt_softc *, int));
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static int lpt_pcc_notrdy __P((struct lpt_softc *, int));
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static void lpt_pcc_wr_data __P((struct lpt_softc *, u_char));
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struct lpt_funcs lpt_pcc_funcs = {
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lpt_pcc_open,
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lpt_pcc_close,
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lpt_pcc_iprime,
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lpt_pcc_speed,
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lpt_pcc_notrdy,
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lpt_pcc_wr_data
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};
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/*
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* Autoconfig stuff
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*/
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static int lpt_pcc_match __P((struct device *, struct cfdata *, void *));
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static void lpt_pcc_attach __P((struct device *, struct device *, void *));
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struct cfattach lpt_pcc_ca = {
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sizeof(struct lpt_softc), lpt_pcc_match, lpt_pcc_attach
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};
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extern struct cfdriver lpt_cd;
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/*ARGSUSED*/
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static int
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lpt_pcc_match(parent, cf, args)
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struct device *parent;
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struct cfdata *cf;
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void *args;
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{
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struct pcc_attach_args *pa = args;
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if (strcmp(pa->pa_name, lpt_cd.cd_name))
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return (0);
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pa->pa_ipl = cf->pcccf_ipl;
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return (1);
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}
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/*ARGSUSED*/
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static void
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lpt_pcc_attach(parent, self, args)
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struct device *parent, *self;
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void *args;
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{
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struct lpt_softc *sc = (void *)self;
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struct pcc_attach_args *pa = args;
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union lpt_regs *regs;
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/*
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* Get pointer to regs
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*/
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regs = sc->sc_regs = (void *) PCC_VADDR(pa->pa_offset);
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sc->sc_ipl = pa->pa_ipl & PCC_IMASK;
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sc->sc_laststatus = 0;
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sc->sc_funcs = &lpt_pcc_funcs;
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printf(": PCC Parallel Printer\n");
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/*
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* Disable interrupts until device is opened
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*/
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sys_pcc->pr_int = 0;
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/*
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* Main attachment code
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*/
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lpt_attach_subr(sc);
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/*
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* Hook into the printer interrupt
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*/
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pccintr_establish(PCCV_PRINTER, lpt_pcc_intr, sc->sc_ipl, sc);
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}
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/*
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* Handle printer interrupts which occur when the printer is ready to accept
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* another char.
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*/
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int
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lpt_pcc_intr(arg)
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void *arg;
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{
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struct lpt_softc *sc = (struct lpt_softc *)arg;
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int i;
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/* is printer online and ready for output */
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if (lpt_pcc_notrdy(sc, 0) && lpt_pcc_notrdy(sc, 1))
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return 0;
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i = lpt_intr(sc);
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if ( sys_pcc->pr_int & LPI_ACKINT )
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sys_pcc->pr_int = sc->sc_icr | LPI_ACKINT;
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return i;
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}
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static void
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lpt_pcc_open(sc, int_ena)
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struct lpt_softc *sc;
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int int_ena;
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{
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int sps;
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sys_pcc->pr_int = LPI_ACKINT | LPI_FAULTINT;
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if ( int_ena == 0 ) {
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sps = splhigh();
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sc->sc_icr = sc->sc_ipl | LPI_ENABLE;
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sys_pcc->pr_int = sc->sc_icr;
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splx(sps);
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}
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}
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static void
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lpt_pcc_close(sc)
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struct lpt_softc *sc;
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{
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sys_pcc->pr_int = 0;
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sc->sc_icr = sc->sc_ipl;
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sys_pcc->pr_int = sc->sc_icr;
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}
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static void
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lpt_pcc_iprime(sc)
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struct lpt_softc *sc;
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{
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sys_pcc->pr_cr = LPC_INPUT_PRIME;
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delay(100);
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}
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static void
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lpt_pcc_speed(sc, speed)
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struct lpt_softc *sc;
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int speed;
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{
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if ( speed == LPT_STROBE_FAST )
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sys_pcc->pr_cr = LPC_FAST_STROBE;
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else
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sys_pcc->pr_cr = 0;
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}
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static int
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lpt_pcc_notrdy(sc, err)
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struct lpt_softc *sc;
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int err;
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{
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union lpt_regs *regs = sc->sc_regs;
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u_char status;
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u_char new;
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#define LPS_INVERT (LPS_SELECT)
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#define LPS_MASK (LPS_SELECT|LPS_FAULT|LPS_BUSY|LPS_PAPER_EMPTY)
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status = (regs->pr_status ^ LPS_INVERT) & LPS_MASK;
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if ( err ) {
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new = status & ~sc->sc_laststatus;
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sc->sc_laststatus = status;
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if (new & LPS_SELECT)
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log(LOG_NOTICE, "%s: offline\n",
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sc->sc_dev.dv_xname);
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else if (new & LPS_PAPER_EMPTY)
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log(LOG_NOTICE, "%s: out of paper\n",
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sc->sc_dev.dv_xname);
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else if (new & LPS_FAULT)
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log(LOG_NOTICE, "%s: output error\n",
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sc->sc_dev.dv_xname);
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}
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sys_pcc->pr_int = sc->sc_icr | LPI_FAULTINT;
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return status;
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}
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static void
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lpt_pcc_wr_data(sc, data)
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struct lpt_softc *sc;
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u_char data;
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{
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union lpt_regs *regs = sc->sc_regs;
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regs->pr_data = data;
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}
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