/*      $NetBSD: lpt_pcctwo.c,v 1.12 2009/03/14 15:36:19 dsl Exp $      */

/*-
* Copyright (c) 1999, 2002 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.
*
* 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 PCCChip2's parallel printer port
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lpt_pcctwo.c,v 1.12 2009/03/14 15:36:19 dsl Exp $");

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/syslog.h>

#include <sys/cpu.h>
#include <sys/bus.h>

#include <dev/mvme/lptvar.h>
#include <dev/mvme/pcctworeg.h>
#include <dev/mvme/pcctwovar.h>

/*
* Autoconfig stuff
*/
int lpt_pcctwo_match(device_t, cfdata_t , void *);
void lpt_pcctwo_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(lpt_pcctwo, sizeof(struct lpt_softc),
   lpt_pcctwo_match, lpt_pcctwo_attach, NULL, NULL);

extern struct cfdriver lpt_cd;


int lpt_pcctwo_intr(void *);
void lpt_pcctwo_open(struct lpt_softc *, int);
void lpt_pcctwo_close(struct lpt_softc *);
void lpt_pcctwo_iprime(struct lpt_softc *);
void lpt_pcctwo_speed(struct lpt_softc *, int);
int lpt_pcctwo_notrdy(struct lpt_softc *, int);
void lpt_pcctwo_wr_data(struct lpt_softc *, u_char);

struct lpt_funcs lpt_pcctwo_funcs = {
       lpt_pcctwo_open,
       lpt_pcctwo_close,
       lpt_pcctwo_iprime,
       lpt_pcctwo_speed,
       lpt_pcctwo_notrdy,
       lpt_pcctwo_wr_data
};

/* ARGSUSED */
int
lpt_pcctwo_match(device_t parent, cfdata_t cf, void *args)
{
       struct pcctwo_attach_args *pa;

       pa = args;

       if (strcmp(pa->pa_name, lpt_cd.cd_name))
               return (0);

#ifdef MVME68K
       if (machineid != MVME_167 && machineid != MVME_177)
               return (0);
#endif

#ifdef MVME88K
       if (machineid != MVME_187)
               return (0);
#endif

       pa->pa_ipl = cf->pcctwocf_ipl;

       return (1);
}

/* ARGSUSED */
void
lpt_pcctwo_attach(device_t parent, device_t self, void *args)
{
       struct pcctwo_attach_args *pa;
       struct lpt_softc *sc;

       pa = (struct pcctwo_attach_args *) args;
       sc = device_private(self);
       sc->sc_dev = self;

       /* The printer registers are part of the PCCChip2's own registers. */
       sc->sc_bust = pa->pa_bust;
       bus_space_map(pa->pa_bust, pa->pa_offset, PCC2REG_SIZE, 0,
           &sc->sc_bush);

       sc->sc_ipl = pa->pa_ipl & PCCTWO_ICR_LEVEL_MASK;
       sc->sc_laststatus = 0;
       sc->sc_funcs = &lpt_pcctwo_funcs;

       aprint_normal(": PCCchip2 Parallel Printer\n");

       /*
        * Disable interrupts until device is opened
        */
       pcc2_reg_write(sc, PCC2REG_PRT_ACK_ICSR, 0);
       pcc2_reg_write(sc, PCC2REG_PRT_FAULT_ICSR, 0);
       pcc2_reg_write(sc, PCC2REG_PRT_SEL_ICSR, 0);
       pcc2_reg_write(sc, PCC2REG_PRT_PE_ICSR, 0);
       pcc2_reg_write(sc, PCC2REG_PRT_BUSY_ICSR, 0);
       pcc2_reg_write(sc, PCC2REG_PRT_CONTROL, 0);

       /*
        * Main attachment code
        */
       lpt_attach_subr(sc);

       /* Register the event counter */
       evcnt_attach_dynamic(&sc->sc_evcnt, EVCNT_TYPE_INTR,
           pcctwointr_evcnt(sc->sc_ipl), "printer", device_xname(sc->sc_dev));

       /*
        * Hook into the printer interrupt
        */
       pcctwointr_establish(PCCTWOV_PRT_ACK, lpt_pcctwo_intr, sc->sc_ipl, sc,
           &sc->sc_evcnt);
}

/*
* Handle printer interrupts
*/
int
lpt_pcctwo_intr(void *arg)
{
       struct lpt_softc *sc;
       int i;

       sc = (struct lpt_softc *) arg;

       /* is printer online and ready for output */
       if (lpt_pcctwo_notrdy(sc, 0) || lpt_pcctwo_notrdy(sc, 1))
               return (0);

       i = lpt_intr(sc);

       if (pcc2_reg_read(sc, PCC2REG_PRT_INPUT_STATUS) & PCCTWO_PRT_IN_SR_PINT)
               pcc2_reg_write(sc, PCC2REG_PRT_ACK_ICSR,
                   sc->sc_icr | PCCTWO_ICR_ICLR);

       return (i);
}

void
lpt_pcctwo_open(struct lpt_softc *sc, int int_ena)
{
       int sps;

       pcc2_reg_write(sc, PCC2REG_PRT_ACK_ICSR,
           PCCTWO_ICR_ICLR | PCCTWO_ICR_EDGE);

       pcc2_reg_write(sc, PCC2REG_PRT_CONTROL,
           pcc2_reg_read(sc, PCC2REG_PRT_CONTROL) | PCCTWO_PRT_CTRL_DOEN);

       if (int_ena == 0) {
               sps = splhigh();
               sc->sc_icr = sc->sc_ipl | PCCTWO_ICR_EDGE;
               pcc2_reg_write(sc, PCC2REG_PRT_ACK_ICSR, sc->sc_icr);
               splx(sps);
       }
}

void
lpt_pcctwo_close(struct lpt_softc *sc)
{

       pcc2_reg_write(sc, PCC2REG_PRT_ACK_ICSR,
           PCCTWO_ICR_ICLR | PCCTWO_ICR_EDGE);
       pcc2_reg_write(sc, PCC2REG_PRT_CONTROL, 0);
}

void
lpt_pcctwo_iprime(struct lpt_softc *sc)
{

       pcc2_reg_write(sc, PCC2REG_PRT_CONTROL,
           pcc2_reg_read(sc, PCC2REG_PRT_CONTROL) | PCCTWO_PRT_CTRL_INP);

       delay(100);

       pcc2_reg_write(sc, PCC2REG_PRT_CONTROL,
           pcc2_reg_read(sc, PCC2REG_PRT_CONTROL) & ~PCCTWO_PRT_CTRL_INP);

       delay(100);
}

void
lpt_pcctwo_speed(struct lpt_softc *sc, int speed)
{
       u_int8_t reg;

       reg = pcc2_reg_read(sc, PCC2REG_PRT_CONTROL);

       if (speed == LPT_STROBE_FAST)
               reg |= PCCTWO_PRT_CTRL_FAST;
       else
               reg &= ~PCCTWO_PRT_CTRL_FAST;

       pcc2_reg_write(sc, PCC2REG_PRT_CONTROL, reg);
}

int
lpt_pcctwo_notrdy(struct lpt_softc *sc, int err)
{
       u_int8_t status;
       u_int8_t new;

#define LPS_INVERT      (PCCTWO_PRT_IN_SR_SEL)
#define LPS_MASK        (PCCTWO_PRT_IN_SR_SEL | PCCTWO_PRT_IN_SR_FLT | \
                        PCCTWO_PRT_IN_SR_BSY | PCCTWO_PRT_IN_SR_PE)

       status = pcc2_reg_read(sc, PCC2REG_PRT_INPUT_STATUS) ^ LPS_INVERT;
       status &= LPS_MASK;

       if (err) {
               new = status & ~sc->sc_laststatus;
               sc->sc_laststatus = status;

               if (new & PCCTWO_PRT_IN_SR_SEL)
                       log(LOG_NOTICE, "%s: offline\n",
                           device_xname(sc->sc_dev));
               else if (new & PCCTWO_PRT_IN_SR_PE)
                       log(LOG_NOTICE, "%s: out of paper\n",
                           device_xname(sc->sc_dev));
               else if (new & PCCTWO_PRT_IN_SR_FLT)
                       log(LOG_NOTICE, "%s: output error\n",
                           device_xname(sc->sc_dev));
       }

       return (status);
}

void
lpt_pcctwo_wr_data(struct lpt_softc *sc, u_char data)
{

       pcc2_reg_write16(sc, PCC2REG_PRT_DATA, (u_int16_t) data);
}

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