* Copyright (c) 1999 The NetBSD Foundation, Inc.

/* $NetBSD: lpt_pcc.c,v 1.12 2008/04/28 20:23:29 martin 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.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lpt_pcc.c,v 1.12 2008/04/28 20:23:29 martin Exp $");

#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 <dev/mvme/lptvar.h>

#include <mvme68k/dev/lpt_pccreg.h>
#include <mvme68k/dev/pccreg.h>
#include <mvme68k/dev/pccvar.h>

#include "ioconf.h"

static int lpt_pcc_intr(void *);
static void lpt_pcc_open(struct lpt_softc *, int);
static void lpt_pcc_close(struct lpt_softc *);
static void lpt_pcc_iprime(struct lpt_softc *);
static void lpt_pcc_speed(struct lpt_softc *, int);
static int lpt_pcc_notrdy(struct lpt_softc *, int);
static void lpt_pcc_wr_data(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(device_t, cfdata_t , void *);
static void lpt_pcc_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(lpt_pcc, sizeof(struct lpt_softc),
lpt_pcc_match, lpt_pcc_attach, NULL, NULL);

/*ARGSUSED*/
static int
lpt_pcc_match(device_t parent, cfdata_t 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(device_t parent, device_t self, void *args)
{
struct lpt_softc *sc;
struct pcc_attach_args *pa;

sc = device_private(self);
sc->sc_dev = 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;

aprint_normal(": 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);

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

/*
* Hook into the printer interrupt
*/
pccintr_establish(PCCV_PRINTER, lpt_pcc_intr, sc->sc_ipl, sc,
&sc->sc_evcnt);
}

/*
* Handle printer interrupts which occur when the printer is ready to accept
* another char.
*/
int
lpt_pcc_intr(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(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(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(struct lpt_softc *sc)
{

lpt_control_write(LPC_INPUT_PRIME);
delay(100);
}

/* ARGSUSED */
static void
lpt_pcc_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(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",
device_xname(sc->sc_dev));
else if (new & LPS_PAPER_EMPTY)
log(LOG_NOTICE, "%s: out of paper\n",
device_xname(sc->sc_dev));
else if (new & LPS_FAULT)
log(LOG_NOTICE, "%s: output error\n",
device_xname(sc->sc_dev));
}

pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL,
sc->sc_icr | LPI_FAULTINT);

return status;
}

static void
lpt_pcc_wr_data(struct lpt_softc *sc, u_char data)
{

lpt_data_write(sc, data);
}