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

/*	$NetBSD: clmpcc_pcctwo.c,v 1.2 1999/02/14 17:54:28 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.
 */

/*
 * Cirrus Logic CD2401 4-channel serial chip. PCCchip2 Front-end.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>

#include <dev/cons.h>

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

#include <dev/ic/clmpccvar.h>

#include <mvme68k/dev/pccvar.h>
#include <mvme68k/dev/pcctworeg.h>


/* Definition of the driver for autoconfig. */
static int	clmpcc_pcctwo_match  __P((struct device *,
					struct cfdata *, void *));
static void	clmpcc_pcctwo_attach __P((struct device *,
					struct device *, void *));
static void	clmpcc_pcctwo_iackhook __P((struct clmpcc_softc *, int));
static void	clmpcc_pcctwo_softhook __P((struct clmpcc_softc *));

static u_long	clmpcc_pcctwo_sir;

struct cfattach clmpcc_pcctwo_ca = {
	sizeof(struct clmpcc_softc), clmpcc_pcctwo_match, clmpcc_pcctwo_attach
};

extern struct cfdriver clmpcc_cd;

/*
 * For clmpccopen()
 */
cdev_decl(clmpcc);


/*
 * Is the CD2401 chip present?
 */
static int
clmpcc_pcctwo_match(parent, cf, aux)
	struct device *parent;
	struct cfdata *cf;
	void *aux;
{
	struct pcc_attach_args *pa = aux;

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

	pa->pa_ipl = cf->pcccf_ipl;

	return (1);
}

/*
 * Attach a found CD2401.
 */
static void
clmpcc_pcctwo_attach(parent, self, aux)
	struct device *parent;
	struct device *self;
	void *aux;
{
	struct clmpcc_softc *sc = (void *) self;
	struct pcc_attach_args *pa = aux;
	int level = pa->pa_ipl;

	sc->sc_iot = (bus_space_tag_t)0;
	sc->sc_ioh = (bus_space_handle_t) PCCTWO_VADDR(pa->pa_offset);
	sc->sc_clk = 20000000;
	sc->sc_byteswap = CLMPCC_BYTESWAP_LOW;
	sc->sc_swaprtsdtr = 1;
	sc->sc_iackhook = clmpcc_pcctwo_iackhook;
	sc->sc_softhook = clmpcc_pcctwo_softhook;
	sc->sc_vector_base = PCCTWO_SCC_VECBASE;
	sc->sc_rpilr = 0x03;
	sc->sc_tpilr = 0x02;
	sc->sc_mpilr = 0x01;

	/* Do common parts of CD2401 configuration. */
	clmpcc_attach(sc);

	/* Allocate a software interrupt cookie */
	clmpcc_pcctwo_sir = allocate_sir(clmpcc_softintr, sc);

	/* Hook the interrupts */
	pcctwointr_establish(PCCTWOV_SCC_RX, clmpcc_rxintr, level, sc);
	pcctwointr_establish(PCCTWOV_SCC_RX_EXCEP, clmpcc_rxintr, level, sc);
	pcctwointr_establish(PCCTWOV_SCC_TX, clmpcc_txintr, level, sc);
	pcctwointr_establish(PCCTWOV_SCC_MODEM, clmpcc_mdintr, level, sc);

	/* Enable the interrupts */
	sys_pcctwo->scc_mod_icr = level | PCCTWO_ICR_IEN;
	sys_pcctwo->scc_rx_icr  = level | PCCTWO_ICR_IEN;
	sys_pcctwo->scc_tx_icr  = level | PCCTWO_ICR_IEN;
}

static void
clmpcc_pcctwo_softhook(sc)
	struct clmpcc_softc *sc;
{
	setsoftint(clmpcc_pcctwo_sir);
}

void
clmpcc_pcctwo_iackhook(sc, which)
	struct clmpcc_softc *sc;
	int which;
{
	struct pcctwo *pcc2;
	volatile u_char foo;

	if ( (pcc2 = sys_pcctwo) == NULL )
		pcc2 = PCCTWO_VADDR(PCCTWO_REG_OFF);

	switch ( which ) {
	  case CLMPCC_IACK_MODEM:
		foo = pcc2->scc_mod_piack;
		break;

	  case CLMPCC_IACK_RX:
		foo = pcc2->scc_rx_piack;
		break;

	  case CLMPCC_IACK_TX:
		foo = pcc2->scc_tx_piack;
		break;
	}
}


/****************************************************************
 * Console support functions (MVME PCCchip2 specific!)
 ****************************************************************/

/*
 * Check for CD2401 console.
 */
void
clmpcccnprobe(cp)
	struct consdev *cp;
{
	int	maj;

	if (machineid == MVME_147) {
		cp->cn_pri = CN_DEAD;
		return;
	}

	/*
	 * Locate the major number
	 */
	for (maj = 0; maj < nchrdev; maj++) {
		if ( cdevsw[maj].d_open == clmpccopen )
			break;
	}

	/* Initialize required fields. */
	cp->cn_dev = makedev(maj, 0);
	cp->cn_pri = CN_NORMAL;
}

void
clmpcccninit(cp)
	struct consdev *cp;
{
	static struct clmpcc_softc cons_sc;

	cons_sc.sc_iot = (bus_space_tag_t)0;
	cons_sc.sc_ioh = (bus_space_handle_t) PCCTWO_VADDR(PCCTWO_SCC_OFF);
	cons_sc.sc_clk = 20000000;
	cons_sc.sc_byteswap = CLMPCC_BYTESWAP_LOW;
	cons_sc.sc_swaprtsdtr = 1;
	cons_sc.sc_iackhook = clmpcc_pcctwo_iackhook;
	cons_sc.sc_vector_base = PCCTWO_SCC_VECBASE;
	cons_sc.sc_rpilr = 0x03;
	cons_sc.sc_tpilr = 0x02;
	cons_sc.sc_mpilr = 0x01;

	clmpcc_cnattach(&cons_sc, 0, 9600);
}