freebsd-nq/sys/i386/isa/isa_compat.c

/*-
 * Copyright (c) 1998 Doug Rabson
 * 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.
 */

#ifndef BURN_BRIDGES

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <sys/rman.h>

#include <machine/vmparam.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/pmap.h>
#include <machine/md_var.h>

#include <machine/resource.h>
#include <isa/isavar.h>
#include <i386/isa/isa_device.h>

/*
 * The 'priv' field has been removed from 'struct driver' since the
 * only remaining user of that field was this compatibility layer. We
 * use this field to map from the newbus driver stub to the underlying
 * old-style isa driver.
 */
struct isa_compat_driver {
	KOBJ_CLASS_FIELDS;
	void *priv;
};

struct isa_compat_resources {
	struct resource *ports;
	struct resource *memory;
	struct resource *drq;
	struct resource *irq;
};

static void
isa_compat_alloc_resources(device_t dev, struct isa_compat_resources *res)
{
	int rid;
	u_long start, count;

	if (bus_get_resource(dev, SYS_RES_IOPORT, 0,
			     &start, &count) == 0) {
		rid = 0;
		res->ports = bus_alloc_resource(dev, SYS_RES_IOPORT,
						&rid, 0ul, ~0ul, 1,
						RF_ACTIVE);
		if (res->ports == NULL && bootverbose)
			printf("isa_compat: didn't get ports for %s\n",
			       device_get_name(dev));
	} else
		res->ports = 0;

	if (bus_get_resource(dev, SYS_RES_MEMORY, 0,
			     &start, &count) == 0
	    && start != 0) {
		rid = 0;
		res->memory = bus_alloc_resource(dev, SYS_RES_MEMORY,
						 &rid, 0ul, ~0ul, 1,
						 RF_ACTIVE);
		if (res->memory == NULL && bootverbose)
			printf("isa_compat: didn't get memory for %s\n",
			       device_get_name(dev));
	} else
		res->memory = 0;

	if (bus_get_resource(dev, SYS_RES_DRQ, 0,
			     &start, &count) == 0) {
		rid = 0;
		res->drq = bus_alloc_resource(dev, SYS_RES_DRQ,
					      &rid, 0ul, ~0ul, 1,
					      RF_ACTIVE);
		if (res->drq == NULL && bootverbose)
			printf("isa_compat: didn't get drq for %s\n",
			       device_get_name(dev));
	} else
		res->drq = 0;

	if (bus_get_resource(dev, SYS_RES_IRQ, 0,
			     &start, &count) == 0) {
		rid = 0;
		res->irq = bus_alloc_resource(dev, SYS_RES_IRQ,
					      &rid, 0ul, ~0ul, 1,
					      RF_SHAREABLE | RF_ACTIVE);
		if (res->irq == NULL && bootverbose)
			printf("isa_compat: didn't get irq for %s\n",
			       device_get_name(dev));
	} else
		res->irq = 0;
}

static void
isa_compat_release_resources(device_t dev, struct isa_compat_resources *res)
{
	if (res->ports) {
		bus_release_resource(dev, SYS_RES_IOPORT, 0, res->ports);
		res->ports = 0;
	}
	if (res->memory) {
		bus_release_resource(dev, SYS_RES_MEMORY, 0, res->memory);
		res->memory = 0;
	}
	if (res->drq) {
		bus_release_resource(dev, SYS_RES_DRQ, 0, res->drq);
		res->drq = 0;
	}
	if (res->irq) {
		bus_release_resource(dev, SYS_RES_IRQ, 0, res->irq);
		res->irq = 0;
	}
}

#define	irqmask(x)	((x) < 0 ? 0 : (1 << (x)))

static int
isa_compat_probe(device_t dev)
{
	struct isa_compat_driver *drv;
	struct isa_device *dvp = device_get_softc(dev);
	struct isa_compat_resources res;
	u_long start, count;

	/* No pnp support */
	if (isa_get_vendorid(dev))
		return (ENXIO);

	bzero(&res, sizeof(res));
	/*
	 * Fill in the isa_device fields.
	 */
	drv = (struct isa_compat_driver *) device_get_driver(dev);
	dvp->id_driver = drv->priv;
	if (bus_get_resource(dev, SYS_RES_IOPORT, 0,
			     &start, &count) == 0)
		dvp->id_iobase = start;
	else
		dvp->id_iobase = -1;
	if (bus_get_resource(dev, SYS_RES_IRQ, 0,
			     &start, &count) == 0)
		dvp->id_irq = irqmask(start);
	else
		dvp->id_irq = 0;
	if (bus_get_resource(dev, SYS_RES_DRQ, 0,
			     &start, &count) == 0)
		dvp->id_drq = start;
	else
		dvp->id_drq = -1;
	if (bus_get_resource(dev, SYS_RES_MEMORY,
			     0, &start, &count) == 0) {
		dvp->id_maddr = (void *)(uintptr_t)start;
		dvp->id_msize = count;
	} else {
		dvp->id_maddr = NULL;
		dvp->id_msize = 0;
	}
	dvp->id_unit = device_get_unit(dev);
	dvp->id_flags = device_get_flags(dev);
	dvp->id_enabled = device_is_enabled(dev);	/* XXX unused */
	dvp->id_device = dev;

	/*
	 * Do the wrapped probe.
	 */
	if (dvp->id_driver->probe) {
		int portsize;
		void *maddr;
		struct isa_device old;

		isa_compat_alloc_resources(dev, &res);
		if (res.memory)
			maddr = rman_get_virtual(res.memory);
		else
			maddr = 0;
		dvp->id_maddr = maddr;
		old = *dvp;
		portsize = dvp->id_driver->probe(dvp);
		isa_compat_release_resources(dev, &res);
		if (portsize != 0) {
			if (portsize > 0 || dvp->id_iobase != old.id_iobase)
				bus_set_resource(dev, SYS_RES_IOPORT,
						 0, dvp->id_iobase, portsize);
			if (dvp->id_irq != old.id_irq)
				bus_set_resource(dev, SYS_RES_IRQ, 0,
						 ffs(dvp->id_irq) - 1, 1);
			if (dvp->id_drq != old.id_drq)
				bus_set_resource(dev, SYS_RES_DRQ, 0,
						 dvp->id_drq, 1);
			if (dvp->id_maddr != old.id_maddr
			    || dvp->id_msize != old.id_msize) {
				maddr = dvp->id_maddr;
				if (maddr != NULL)
					bus_set_resource(dev,
							 SYS_RES_MEMORY,
							 0,
							 kvtop(maddr),
							 dvp->id_msize);
				else
					bus_delete_resource(dev,
							    SYS_RES_MEMORY,
							    0);
			}
			return 0;
		}
	}
	return ENXIO;
}

static void
isa_compat_intr(void *arg)
{
	struct isa_device *dvp;

	dvp = (struct isa_device *)arg;
	dvp->id_ointr(dvp->id_unit);
}

static int
isa_compat_attach(device_t dev)
{
	struct isa_device *dvp = device_get_softc(dev);
	struct isa_compat_resources res;
	int error;

	bzero(&res, sizeof(res));
	isa_compat_alloc_resources(dev, &res);
	if (dvp->id_driver->attach)
		dvp->id_driver->attach(dvp);
	if (res.irq && dvp->id_irq && dvp->id_intr) {
		void *ih;

		error = BUS_SETUP_INTR(device_get_parent(dev), dev,
				       res.irq, dvp->id_driver->intrflags,
				       isa_compat_intr, dvp, &ih);
		if (error)
			printf("isa_compat_attach: failed to setup intr: %d\n",
			       error);
	}
	device_printf(dev, "driver is using old-style compatibility shims\n");
	return 0;
}

static device_method_t isa_compat_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		isa_compat_probe),
	DEVMETHOD(device_attach,	isa_compat_attach),

	{ 0, 0 }
};

/*
 * Create a new style driver around each old isa driver.
 */
int
compat_isa_handler(module_t mod, int type, void *data)
{
	struct isa_driver *id = (struct isa_driver *)data;
	struct isa_compat_driver *driver;
	devclass_t isa_devclass = devclass_find("isa");

	switch (type) {
	case MOD_LOAD:
		driver = malloc(sizeof(struct isa_compat_driver),
		    M_DEVBUF, M_NOWAIT | M_ZERO);
		if (!driver)
			return ENOMEM;
		driver->name = id->name;
		driver->methods = isa_compat_methods;
		driver->size = sizeof(struct isa_device);
		driver->priv = id;
		if (id->sensitive_hw) {
#if 0
			resource_set_int(id->name, -1, "sensitive", 1);
#else
			printf("WARNING: isa driver %s is sensitive, but cannot set it!\n",
			    driver->name);
#endif
		}
		devclass_add_driver(isa_devclass, (kobj_class_t) driver);
		break;
	case MOD_UNLOAD:
		printf("%s: module unload not supported!\n", id->name);
		return EOPNOTSUPP;
	default:
		break;
	}
	return 0;
}

#else
#error "cvs rm sys/i386/isa/isa_compat.c"
#endif