freebsd-nq/sys/alpha/pci/tsunami_pci.c

/*-
 * Copyright (c) 1999 Andrew Gallatin
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD$
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <pci/pcivar.h>
#include <alpha/pci/tsunamireg.h>
#include <alpha/pci/tsunamivar.h>


static devclass_t	pcib_devclass;

int tsunami_hoses[TSUNAMI_MAXHOSES+1] = {0,-1,-1,-1,-1};

int
tsunami_bus_within_hose(int hose, int bus)
{
	return(bus - tsunami_hoses[hose]);
}

int 
tsunami_hose_from_bus(int bus)
{
	int i;
	for(i = 1; i <= TSUNAMI_MAXHOSES && tsunami_hoses[i] != -1; i++){
		if(tsunami_hoses[i] > bus)
			return i-1;
	}
	return i-1;
	
}


static int
tsunami_pcib_probe(device_t dev)
{
	static int hoseno = 0;
	device_t child;

	device_set_desc(dev, "21271 PCI host bus adapter");

	child = device_add_child(dev, "pci", -1);

	if(hoseno)
		tsunami_hoses[hoseno] = device_get_unit(child);
	hoseno++;
	return 0;
}

static int
tsunami_pcib_read_ivar(device_t dev, device_t child, int which, u_long *result)
{
	if (which == PCIB_IVAR_HOSE) {
		*result = *(int*) device_get_ivars(dev);
		return 0;
	}
	return ENOENT;
}

static device_method_t tsunami_pcib_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		tsunami_pcib_probe),
	DEVMETHOD(device_attach,	bus_generic_attach),

	/* Bus interface */
	DEVMETHOD(bus_print_child,	bus_generic_print_child),
	DEVMETHOD(bus_read_ivar,	tsunami_pcib_read_ivar),
	DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),

	{ 0, 0 }
};


static driver_t tsunami_pcib_driver = {
	"pcib",
	tsunami_pcib_methods,
	1,
};


DRIVER_MODULE(pcib, tsunami, tsunami_pcib_driver, pcib_devclass, 0, 0);