freebsd-dev/sys/dev/dpt/dpt_isa.c

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/*-
* Copyright (c) 2000 Matthew N. Dodd <winter@jurai.net>
* 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/bus.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include <cam/scsi/scsi_all.h>
#include <dev/dpt/dpt.h>
static int dpt_isa_probe (device_t);
static int dpt_isa_attach (device_t);
static int
dpt_isa_probe (device_t dev)
{
dpt_conf_t * conf;
u_int32_t io_base;
/* No pnp support */
if (isa_get_vendorid(dev))
return (ENXIO);
if ((io_base = bus_get_resource_start(dev, SYS_RES_IOPORT, 0)) == 0)
return (ENXIO);
conf = dpt_pio_get_conf(io_base);
if (!conf) {
printf("dpt: dpt_pio_get_conf() failed.\n");
return (ENXIO);
}
device_set_desc(dev, "ISA DPT SCSI controller");
bus_set_resource(dev, SYS_RES_IRQ, 0, conf->IRQ, 1);
bus_set_resource(dev, SYS_RES_DRQ, 0, ((8 - conf->DMA_channel) & 7), 1);
return 0;
}
static int
dpt_isa_attach (device_t dev)
{
dpt_softc_t * dpt = NULL;
struct resource *io = 0;
struct resource *irq = 0;
struct resource *drq = 0;
int s;
int rid;
void * ih;
int error = 0;
rid = 0;
io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE);
if (!io) {
device_printf(dev, "No I/O space?!\n");
error = ENOMEM;
goto bad;
}
rid = 0;
irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_ACTIVE);
if (!irq) {
device_printf(dev, "No IRQ!\n");
error = ENOMEM;
goto bad;
}
rid = 0;
drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid, 0, ~0, 1, RF_ACTIVE);
if (!drq) {
device_printf(dev, "No DRQ?!\n");
error = ENOMEM;
goto bad;
}
dpt = dpt_alloc(dev, rman_get_bustag(io), rman_get_bushandle(io));
if (dpt == NULL) {
error = ENXIO;
goto bad;
}
isa_dmacascade(rman_get_start(drq));
/* Allocate a dmatag representing the capabilities of this attachment */
if (bus_dma_tag_create( /* parent */ NULL,
/* alignemnt */ 1,
/* boundary */ 0,
/* lowaddr */ BUS_SPACE_MAXADDR_24BIT,
/* highaddr */ BUS_SPACE_MAXADDR,
/* filter */ NULL,
/* filterarg */ NULL,
/* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
/* nsegments */ BUS_SPACE_UNRESTRICTED,
/* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
/* flags */ 0,
&dpt->parent_dmat) != 0) {
error = ENXIO;
goto bad;
}
s = splcam();
if (dpt_init(dpt) != 0) {
splx(s);
error = ENXIO;
goto bad;
}
/* Register with the XPT */
dpt_attach(dpt);
splx(s);
if (bus_setup_intr(dev, irq, INTR_TYPE_CAM | INTR_ENTROPY, dpt_intr,
dpt, &ih)) {
device_printf(dev, "Unable to register interrupt handler\n");
error = ENXIO;
goto bad;
}
return (error);
bad:
if (dpt)
dpt_free(dpt);
if (io)
bus_release_resource(dev, SYS_RES_IOPORT, 0, io);
if (irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, irq);
if (drq)
bus_release_resource(dev, SYS_RES_DRQ, 0, drq);
return (error);
}
static device_method_t dpt_isa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, dpt_isa_probe),
DEVMETHOD(device_attach, dpt_isa_attach),
{ 0, 0 }
};
static driver_t dpt_isa_driver = {
"dpt",
dpt_isa_methods,
sizeof(dpt_softc_t),
};
static devclass_t dpt_devclass;
DRIVER_MODULE(dpt, isa, dpt_isa_driver, dpt_devclass, 0, 0);