freebsd-skq/sys/dev/cy/cy_isa.c

/*-
 * cyclades cyclom-y serial driver
 *	Andrew Herbert <andrew@werple.apana.org.au>, 17 August 1993
 *
 * Copyright (c) 1993 Andrew Herbert.
 * 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. The name Andrew Herbert may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ``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 I 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.
 */

/*
 * Cyclades Y ISA serial interface driver
 */

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

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

#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>

#include <isa/isavar.h>

#include <dev/cy/cyreg.h>
#include <dev/cy/cyvar.h>

static int	cy_isa_attach(device_t dev);
static int	cy_isa_probe(device_t dev);

static device_method_t cy_isa_methods[] = {
	/* Device interface. */
	DEVMETHOD(device_probe,		cy_isa_probe),
	DEVMETHOD(device_attach,	cy_isa_attach),

	{ 0, 0 }
};

static driver_t cy_isa_driver = {
	cy_driver_name,
	cy_isa_methods,
	0,
};

DRIVER_MODULE(cy, isa, cy_isa_driver, cy_devclass, 0, 0);

static int
cy_isa_probe(device_t dev)
{
	struct resource *mem_res;
	cy_addr iobase;
	int error, mem_rid;

	if (isa_get_logicalid(dev) != 0)	/* skip PnP probes */
		return (ENXIO);

	mem_rid = 0;
	mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &mem_rid,
	    0ul, ~0ul, 0ul, RF_ACTIVE);
	if (mem_res == NULL) {
		device_printf(dev, "ioport resource allocation failed\n");
		return (ENXIO);
	}
	iobase = rman_get_virtual(mem_res);

	/* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
	cy_inb(iobase, CY16_RESET, 0);	/* XXX? */
	DELAY(500);		/* wait for the board to get its act together */

	/* this is needed to get the board out of reset */
	cy_outb(iobase, CY_CLEAR_INTR, 0, 0);
	DELAY(500);

	error = (cy_units(iobase, 0) == 0 ? ENXIO : 0);
	bus_release_resource(dev, SYS_RES_MEMORY, mem_rid, mem_res);
	return (error);
}

static int
cy_isa_attach(device_t dev)
{
	struct resource *irq_res, *mem_res;
	void *irq_cookie, *vaddr, *vsc;
	int irq_rid, mem_rid;

	irq_res = NULL;
	mem_res = NULL;

	mem_rid = 0;
	mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &mem_rid,
	    0ul, ~0ul, 0ul, RF_ACTIVE);
	if (mem_res == NULL) {
		device_printf(dev, "memory resource allocation failed\n");
		goto fail;
	}
	vaddr = rman_get_virtual(mem_res);

	vsc = cyattach_common(vaddr, 0);
	if (vsc == NULL) {
		device_printf(dev, "no ports found!\n");
		goto fail;
	}

	irq_rid = 0;
	irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &irq_rid, 0ul, ~0ul, 0ul,
	    RF_SHAREABLE | RF_ACTIVE);
	if (irq_res == NULL) {
		device_printf(dev, "interrupt resource allocation failed\n");
		goto fail;
	}
	if (bus_setup_intr(dev, irq_res, INTR_TYPE_TTY, 
	    cyintr, NULL, vsc, &irq_cookie) != 0) {	    
		device_printf(dev, "interrupt setup failed\n");
		goto fail;
	}

	return (0);

fail:
	if (irq_res != NULL)
		bus_release_resource(dev, SYS_RES_IRQ, irq_rid, irq_res);
	if (mem_res != NULL)
		bus_release_resource(dev, SYS_RES_MEMORY, mem_rid, mem_res);
	return (ENXIO);
}