NetBSD/sys/arch/alpha/tc/ioasic.c

/* $NetBSD: ioasic.c,v 1.19 1998/05/27 00:18:13 thorpej Exp $ */

/*-
 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * 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.
 */

/*
 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Keith Bostic, Chris G. Demetriou
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include "opt_dec_3000_300.h"

#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */

__KERNEL_RCSID(0, "$NetBSD: ioasic.c,v 1.19 1998/05/27 00:18:13 thorpej Exp $");

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

#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/pte.h>
#include <machine/rpb.h>
#ifndef EVCNT_COUNTERS
#include <machine/intrcnt.h>
#endif

#include <dev/tc/tcvar.h>
#include <alpha/tc/ioasicreg.h>
#include <dev/tc/ioasicvar.h>

struct ioasic_softc {
	struct	device sc_dv;

	tc_addr_t sc_base;
	void	*sc_cookie;

	bus_dma_tag_t sc_dmat;
	bus_dmamap_t sc_lance_dmam;
};

/* Definition of the driver for autoconfig. */
int	ioasicmatch __P((struct device *, struct cfdata *, void *));
void	ioasicattach __P((struct device *, struct device *, void *));
int     ioasicprint(void *, const char *);

struct cfattach ioasic_ca = {
	sizeof(struct ioasic_softc), ioasicmatch, ioasicattach,
};

int	ioasic_intr __P((void *));
int	ioasic_intrnull __P((void *));

#define	C(x)	((void *)(x))

#define	IOASIC_DEV_LANCE	0
#define	IOASIC_DEV_SCC0		1
#define	IOASIC_DEV_SCC1		2
#define	IOASIC_DEV_ISDN		3

#define	IOASIC_DEV_BOGUS	-1

#define	IOASIC_NCOOKIES		4

struct ioasic_dev {
	char		*iad_modname;
	tc_offset_t	iad_offset;
	void		*iad_cookie;
	u_int32_t	iad_intrbits;
} ioasic_devs[] = {
	/* XXX lance name */
	{ "lance",    IOASIC_SLOT_3_START, C(IOASIC_DEV_LANCE),
	  IOASIC_INTR_LANCE, },
	{ "z8530   ", IOASIC_SLOT_4_START, C(IOASIC_DEV_SCC0),
	  IOASIC_INTR_SCC_0, },
	{ "z8530   ", IOASIC_SLOT_6_START, C(IOASIC_DEV_SCC1),
	  IOASIC_INTR_SCC_1, },
	{ "TOY_RTC ", IOASIC_SLOT_8_START, C(IOASIC_DEV_BOGUS),
	  0, },
	{ "AMD79c30", IOASIC_SLOT_9_START, C(IOASIC_DEV_ISDN),
	  IOASIC_INTR_ISDN,  },
};
int ioasic_ndevs = sizeof(ioasic_devs) / sizeof(ioasic_devs[0]);

struct ioasicintr {
	int	(*iai_func) __P((void *));
	void	*iai_arg;
} ioasicintrs[IOASIC_NCOOKIES];

tc_addr_t ioasic_base;		/* XXX XXX XXX */

/* There can be only one. */
int ioasicfound;

extern int cputype;

/*
 * DMA area for IOASIC LANCE.
 * XXX Should be done differently, but this is better than it used to be.
 */
#define	LE_IOASIC_MEMSIZE	(128*1024)
#define	LE_IOASIC_MEMALIGN	(128*1024)
caddr_t	le_iomem;

void	ioasic_lance_dma_setup __P((struct ioasic_softc *));

int
ioasicmatch(parent, cfdata, aux)
	struct device *parent;
	struct cfdata *cfdata;
	void *aux;
{
	struct tc_attach_args *ta = aux;

	/* Make sure that we're looking for this type of device. */
	if (strncmp("FLAMG-IO", ta->ta_modname, TC_ROM_LLEN))
		return (0);

	/* Check that it can actually exist. */
	if ((cputype != ST_DEC_3000_500) && (cputype != ST_DEC_3000_300))
		panic("ioasicmatch: how did we get here?");

	if (ioasicfound)
		return (0);

	return (1);
}

void
ioasicattach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct ioasic_softc *sc = (struct ioasic_softc *)self;
	struct tc_attach_args *ta = aux;
	struct ioasicdev_attach_args ioasicdev;
	u_long i;

	ioasicfound = 1;

	sc->sc_base = ta->ta_addr;
	ioasic_base = sc->sc_base;			/* XXX XXX XXX */
	sc->sc_cookie = ta->ta_cookie;
	sc->sc_dmat = ta->ta_dmat;

#ifdef DEC_3000_300
	if (cputype == ST_DEC_3000_300) {
		*(volatile u_int *)IOASIC_REG_CSR(sc->sc_base) |=
		    IOASIC_CSR_FASTMODE;
		tc_mb();
		printf(": slow mode\n");
	} else
#endif
		printf(": fast mode\n");

	/*
	 * Turn off all device interrupt bits.
	 * (This does _not_ include 3000/300 TC option slot bits.
	 */
	for (i = 0; i < ioasic_ndevs; i++)
		*(volatile u_int32_t *)IOASIC_REG_IMSK(ioasic_base) &=
			~ioasic_devs[i].iad_intrbits;
	tc_mb();

	/*
	 * Set up interrupt handlers.
	 */
	for (i = 0; i < IOASIC_NCOOKIES; i++) {
		ioasicintrs[i].iai_func = ioasic_intrnull;
		ioasicintrs[i].iai_arg = (void *)i;
	}
	tc_intr_establish(parent, sc->sc_cookie, TC_IPL_NONE, ioasic_intr, sc);

	/*
	 * Set up the LANCE DMA area.
	 */
	ioasic_lance_dma_setup(sc);

        /*
	 * Try to configure each device.
	 */
        for (i = 0; i < ioasic_ndevs; i++) {
		strncpy(ioasicdev.iada_modname, ioasic_devs[i].iad_modname,
			TC_ROM_LLEN);
		ioasicdev.iada_modname[TC_ROM_LLEN] = '\0';
		ioasicdev.iada_offset = ioasic_devs[i].iad_offset;
		ioasicdev.iada_addr = sc->sc_base + ioasic_devs[i].iad_offset;
		ioasicdev.iada_cookie = ioasic_devs[i].iad_cookie;

                /* Tell the autoconfig machinery we've found the hardware. */
                config_found(self, &ioasicdev, ioasicprint);
        }
}

int
ioasicprint(aux, pnp)
	void *aux;
	const char *pnp;
{
	struct ioasicdev_attach_args *d = aux;

        if (pnp)
                printf("%s at %s", d->iada_modname, pnp);
        printf(" offset 0x%lx", (long)d->iada_offset);
        return (UNCONF);
}

int
ioasic_submatch(match, d)
	struct cfdata *match;
	struct ioasicdev_attach_args *d;
{

	return ((match->ioasiccf_offset == d->iada_offset) ||
		(match->ioasiccf_offset == IOASIC_OFFSET_UNKNOWN));
}

void
ioasic_intr_establish(ioa, cookie, level, func, arg)
	struct device *ioa;
	void *cookie, *arg;
	tc_intrlevel_t level;
	int (*func) __P((void *));
{
	u_long dev, i;

	dev = (u_long)cookie;
#ifdef DIAGNOSTIC
	/* XXX check cookie. */
#endif

	if (ioasicintrs[dev].iai_func != ioasic_intrnull)
		panic("ioasic_intr_establish: cookie %d twice", dev);

	ioasicintrs[dev].iai_func = func;
	ioasicintrs[dev].iai_arg = arg;

	/* Enable interrupts for the device. */
	for (i = 0; i < ioasic_ndevs; i++)
		if (ioasic_devs[i].iad_cookie == cookie)
			break;
	if (i == ioasic_ndevs)
		panic("ioasic_intr_establish: invalid cookie.");
	*(volatile u_int32_t *)IOASIC_REG_IMSK(ioasic_base) |=
		ioasic_devs[i].iad_intrbits;
	tc_mb();
}

void
ioasic_intr_disestablish(ioa, cookie)
	struct device *ioa;
	void *cookie;
{
	u_long dev, i;

	dev = (u_long)cookie;
#ifdef DIAGNOSTIC
	/* XXX check cookie. */
#endif

	if (ioasicintrs[dev].iai_func == ioasic_intrnull)
		panic("ioasic_intr_disestablish: cookie %d missing intr", dev);

	/* Enable interrupts for the device. */
	for (i = 0; i < ioasic_ndevs; i++)
		if (ioasic_devs[i].iad_cookie == cookie)
			break;
	if (i == ioasic_ndevs)
		panic("ioasic_intr_disestablish: invalid cookie.");
	*(volatile u_int32_t *)IOASIC_REG_IMSK(ioasic_base) &=
		~ioasic_devs[i].iad_intrbits;
	tc_mb();

	ioasicintrs[dev].iai_func = ioasic_intrnull;
	ioasicintrs[dev].iai_arg = (void *)dev;
}

int
ioasic_intrnull(val)
	void *val;
{

	panic("ioasic_intrnull: uncaught IOASIC intr for cookie %ld\n",
	    (u_long)val);
}

/*
 * asic_intr --
 *	ASIC interrupt handler.
 */
int
ioasic_intr(val)
	void *val;
{
	register struct ioasic_softc *sc = val;
	register int ifound;
	int gifound;
	u_int32_t sir;
	volatile u_int32_t *sirp;

	sirp = (volatile u_int32_t *)IOASIC_REG_INTR(sc->sc_base);

	gifound = 0;
	do {
		ifound = 0;
		tc_syncbus();

		sir = *sirp;

#ifdef EVCNT_COUNTERS
	/* No interrupt counting via evcnt counters */ 
	XXX BREAK HERE XXX
#else /* !EVCNT_COUNTERS */
#define	INCRINTRCNT(slot)	intrcnt[INTRCNT_IOASIC + slot]++
#endif /* EVCNT_COUNTERS */ 

		/* XXX DUPLICATION OF INTERRUPT BIT INFORMATION... */
#define	CHECKINTR(slot, bits)						\
		if (sir & bits) {					\
			ifound = 1;					\
			INCRINTRCNT(slot);				\
			(*ioasicintrs[slot].iai_func)			\
			    (ioasicintrs[slot].iai_arg);		\
		}
		CHECKINTR(IOASIC_DEV_SCC0, IOASIC_INTR_SCC_0);
		CHECKINTR(IOASIC_DEV_SCC1, IOASIC_INTR_SCC_1);
		CHECKINTR(IOASIC_DEV_LANCE, IOASIC_INTR_LANCE);
		CHECKINTR(IOASIC_DEV_ISDN, IOASIC_INTR_ISDN);

		gifound |= ifound;
	} while (ifound);

	return (gifound);
}

/* XXX */
char *
ioasic_lance_ether_address()
{

	return (u_char *)IOASIC_SYS_ETHER_ADDRESS(ioasic_base);
}

void
ioasic_lance_dma_setup(sc)
	struct ioasic_softc *sc;
{
	bus_dma_tag_t dmat = sc->sc_dmat;
	bus_dma_segment_t seg;
	volatile u_int32_t *ldp;
	tc_addr_t tca;
	int rseg;

	/*
	 * Allocate a DMA area for the chip.
	 */
	if (bus_dmamem_alloc(dmat, LE_IOASIC_MEMSIZE, LE_IOASIC_MEMALIGN,
	    0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) {
		printf("%s: can't allocate DMA area for LANCE\n",
		    sc->sc_dv.dv_xname);
		return;
	}
	if (bus_dmamem_map(dmat, &seg, rseg, LE_IOASIC_MEMSIZE,
	    &le_iomem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) {
		printf("%s: can't map DMA area for LANCE\n",
		    sc->sc_dv.dv_xname);
		bus_dmamem_free(dmat, &seg, rseg);
		return;
	}

	/*
	 * Create and load the DMA map for the DMA area.
	 */
	if (bus_dmamap_create(dmat, LE_IOASIC_MEMSIZE, 1,
	    LE_IOASIC_MEMSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_lance_dmam)) {
		printf("%s: can't create DMA map\n", sc->sc_dv.dv_xname);
		goto bad;
	}
	if (bus_dmamap_load(dmat, sc->sc_lance_dmam,
	    le_iomem, LE_IOASIC_MEMSIZE, NULL, BUS_DMA_NOWAIT)) {
		printf("%s: can't load DMA map\n", sc->sc_dv.dv_xname);
		goto bad;
	}

	tca = (tc_addr_t)sc->sc_lance_dmam->dm_segs[0].ds_addr;
	if (tca != sc->sc_lance_dmam->dm_segs[0].ds_addr) {
		printf("%s: bad LANCE DMA address\n", sc->sc_dv.dv_xname);
		bus_dmamap_unload(dmat, sc->sc_lance_dmam);
		goto bad;
	}

	ldp = (volatile u_int *)IOASIC_REG_LANCE_DMAPTR(ioasic_base);
	*ldp = ((tca << 3) & ~(tc_addr_t)0x1f) | ((tca >> 29) & 0x1f);
	tc_wmb();

	*(volatile u_int32_t *)IOASIC_REG_CSR(ioasic_base) |=
	    IOASIC_CSR_DMAEN_LANCE;
	tc_mb();
	return;

 bad:
	bus_dmamem_unmap(dmat, le_iomem, LE_IOASIC_MEMSIZE);
	bus_dmamem_free(dmat, &seg, rseg);
	le_iomem = 0;
}