xref: /src/sys/arch/hpcmips/vr/vrc4172pci.c

/*	$NetBSD: vrc4172pci.c,v 1.2 2002/04/14 08:00:00 takemura Exp $	*/

/*-
 * Copyright (c) 2002 TAKEMURA Shin
 * All rights reserved.
 *
 * 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. Neither the name of the project 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 REGENTS 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 REGENTS 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.
 */

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

#include <machine/bus.h>
#include <machine/bus_space_hpcmips.h>
#include <machine/bus_dma_hpcmips.h>
#include <machine/config_hook.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciidereg.h>

#include <hpcmips/vr/icureg.h>
#include <hpcmips/vr/vripif.h>
#include <hpcmips/vr/vrc4172pcireg.h>

#include "pci.h"

#ifdef DEBUG
#define	DPRINTF(args)	printf args
#else
#define	DPRINTF(args)
#endif

struct vrc4172pci_softc {
	struct device sc_dev;

	bus_space_tag_t sc_iot;
	bus_space_handle_t sc_ioh;

	struct hpcmips_pci_chipset sc_pc;
};

static int	vrc4172pci_match(struct device *, struct cfdata *, void *);
static void	vrc4172pci_attach(struct device *, struct device *, void *);
#if NPCI > 0
static int	vrc4172pci_print(void *, const char *);
#endif
static void	vrc4172pci_attach_hook(struct device *, struct device *,
		    struct pcibus_attach_args *);
static int	vrc4172pci_bus_maxdevs(pci_chipset_tag_t, int);
static int	vrc4172pci_bus_devorder(pci_chipset_tag_t, int, char *);
static pcitag_t	vrc4172pci_make_tag(pci_chipset_tag_t, int, int, int);
static void	vrc4172pci_decompose_tag(pci_chipset_tag_t, pcitag_t, int *,
		    int *, int *);
static pcireg_t	vrc4172pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
static void	vrc4172pci_conf_write(pci_chipset_tag_t, pcitag_t, int,
		    pcireg_t);
static int	vrc4172pci_intr_map(struct pci_attach_args *,
		    pci_intr_handle_t *);
static const char *vrc4172pci_intr_string(pci_chipset_tag_t,pci_intr_handle_t);
static const struct evcnt *vrc4172pci_intr_evcnt(pci_chipset_tag_t,
		    pci_intr_handle_t);
static void	*vrc4172pci_intr_establish(pci_chipset_tag_t,
		    pci_intr_handle_t, int, int (*)(void *), void *);
static void	vrc4172pci_intr_disestablish(pci_chipset_tag_t, void *);

struct cfattach vrc4172pci_ca = {
	sizeof(struct vrc4172pci_softc), vrc4172pci_match, vrc4172pci_attach
};

static inline void
vrc4172pci_write(struct vrc4172pci_softc *sc, int offset, u_int32_t val)
{

	bus_space_write_4(sc->sc_iot, sc->sc_ioh, offset, val);
}

static inline u_int32_t
vrc4172pci_read(struct vrc4172pci_softc *sc, int offset)
{
	u_int32_t res;

	if (bus_space_peek(sc->sc_iot, sc->sc_ioh, offset, 4, &res) < 0) {
		res = 0xffffffff;
	}

	return (res);
}

static int
vrc4172pci_match(struct device *parent, struct cfdata *match, void *aux)
{

	return (1);
}

static void
vrc4172pci_attach(struct device *parent, struct device *self, void *aux)
{
	struct vrc4172pci_softc *sc = (struct vrc4172pci_softc *)self;
	pci_chipset_tag_t pc = &sc->sc_pc;
	struct vrip_attach_args *va = aux;
#if NPCI > 0
	struct pcibus_attach_args pba;
#endif

	sc->sc_iot = va->va_iot;
	if (bus_space_map(sc->sc_iot, va->va_addr, va->va_size, 0,
	    &sc->sc_ioh)) {
		printf(": couldn't map io space\n");
		return;
	}
	printf("\n");

	pc->pc_dev = &sc->sc_dev;
	pc->pc_attach_hook = vrc4172pci_attach_hook;
	pc->pc_bus_maxdevs = vrc4172pci_bus_maxdevs;
	pc->pc_bus_devorder = vrc4172pci_bus_devorder;
	pc->pc_make_tag = vrc4172pci_make_tag;
	pc->pc_decompose_tag = vrc4172pci_decompose_tag;
	pc->pc_conf_read = vrc4172pci_conf_read;
	pc->pc_conf_write = vrc4172pci_conf_write;
	pc->pc_intr_map = vrc4172pci_intr_map;
	pc->pc_intr_string = vrc4172pci_intr_string;
	pc->pc_intr_evcnt = vrc4172pci_intr_evcnt;
	pc->pc_intr_establish = vrc4172pci_intr_establish;
	pc->pc_intr_disestablish = vrc4172pci_intr_disestablish;

#if 0
	{
		int i;

		for (i = 0; i < 2; i++)
			printf("%s: ID_REG(0, 0, %d) = 0x%08x\n",
			    sc->sc_dev.dv_xname, i,
			    pci_conf_read(pc, pci_make_tag(pc, 0, 0, i),
				PCI_ID_REG));
	}
#endif

#if NPCI > 0
	memset(&pba, 0, sizeof(pba));
	pba.pba_busname = "pci";
	pba.pba_iot = sc->sc_iot;
	pba.pba_memt = sc->sc_iot;
	pba.pba_dmat = &hpcmips_default_bus_dma_tag.bdt;
	pba.pba_bus = 0;
	pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
	    PCI_FLAGS_MRL_OKAY;
	pba.pba_pc = pc;

	config_found(self, &pba, vrc4172pci_print);
#endif
}

#if NPCI > 0
static int
vrc4172pci_print(void *aux, const char *pnp)
{
	struct pcibus_attach_args *pba = aux;

	if (pnp != NULL)
		printf("%s at %s", pba->pba_busname, pnp);
	else
		printf(" bus %d", pba->pba_bus);

	return (UNCONF);
}
#endif

void
vrc4172pci_attach_hook(struct device *parent, struct device *self,
    struct pcibus_attach_args *pba)
{

	return;
}

int
vrc4172pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
{

	return (1);	/* Vrc4172 has only one device */
}

int
vrc4172pci_bus_devorder(pci_chipset_tag_t pc, int busno, char *devs)
{
	int i;

	*devs++ = 0;
	for (i = 1; i < 32; i++)
		*devs++ = -1;

	return (1);
}

pcitag_t
vrc4172pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function)
{

	return ((bus << 16) | (device << 11) | (function << 8));
}

void
vrc4172pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp,
    int *fp)
{

	if (bp != NULL)
		*bp = (tag >> 16) & 0xff;
	if (dp != NULL)
		*dp = (tag >> 11) & 0x1f;
	if (fp != NULL)
		*fp = (tag >> 8) & 0x07;
}

pcireg_t
vrc4172pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
{
	struct vrc4172pci_softc *sc = (struct vrc4172pci_softc *)pc->pc_dev;
	u_int32_t val;

	tag |= VRC4172PCI_CONFADDR_CONFIGEN;

	vrc4172pci_write(sc, VRC4172PCI_CONFAREG, tag | reg);
	val = vrc4172pci_read(sc, VRC4172PCI_CONFDREG);
	DPRINTF(("%s: conf_read: tag = 0x%08x, reg = 0x%x, val = 0x%08x\n",
	    sc->sc_dev.dv_xname, (u_int32_t)tag, reg, val));

	return (val);
}

void
vrc4172pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg,
    pcireg_t data)
{
	struct vrc4172pci_softc *sc = (struct vrc4172pci_softc *)pc->pc_dev;

	DPRINTF(("%s: conf_write: tag = 0x%08x, reg = 0x%x, val = 0x%08x\n",
	    sc->sc_dev.dv_xname, (u_int32_t)tag, reg, (u_int32_t)data));
	tag |= VRC4172PCI_CONFADDR_CONFIGEN;

	vrc4172pci_write(sc, VRC4172PCI_CONFAREG, tag | reg);
	vrc4172pci_write(sc, VRC4172PCI_CONFDREG, data);
}

int
vrc4172pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
	pci_chipset_tag_t pc = pa->pa_pc;
	pcitag_t intrtag = pa->pa_intrtag;
	int bus, dev, func;

	pci_decompose_tag(pc, intrtag, &bus, &dev, &func);
	DPRINTF(("%s(%d, %d, %d): line = %d, pin = %d\n", pc->pc_dev->dv_xname,
	    bus, dev, func, pa->pa_intrline, pa->pa_intrpin));

	*ihp = CONFIG_HOOK_PCIINTR_ID(bus, dev, func);

	return (0);
}

const char *
vrc4172pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih)
{
	static char irqstr[sizeof("pciintr") + 16];

	snprintf(irqstr, sizeof(irqstr), "pciintr %d:%d:%d",
	    CONFIG_HOOK_PCIINTR_BUS((int)ih),
	    CONFIG_HOOK_PCIINTR_DEVICE((int)ih),
	    CONFIG_HOOK_PCIINTR_FUNCTION((int)ih));

	return (irqstr);
}

const struct evcnt *
vrc4172pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih)
{

	return (NULL);
}

void *
vrc4172pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih,
    int level, int (*func)(void *), void *arg)
{

	if (ih == -1)
		return (NULL);
	DPRINTF(("vrc4172pci_intr_establish: %lx\n", ih));

	return (config_hook(CONFIG_HOOK_PCIINTR, ih, CONFIG_HOOK_EXCLUSIVE,
	    (int (*)(void *, int, long, void *))func, arg));
}

void
vrc4172pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie)
{

	DPRINTF(("vrc4172pci_intr_disestablish: %p\n", cookie));
	config_unhook(cookie);
}