258 lines
6.8 KiB
C
258 lines
6.8 KiB
C
/*
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* Copyright 2002 by Peter Grehan. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* PSIM local bus ATA controller
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*/
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#include "opt_ata.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <sys/sema.h>
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#include <sys/taskqueue.h>
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#include <machine/stdarg.h>
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#include <vm/uma.h>
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#include <machine/resource.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <sys/ata.h>
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#include <dev/ata/ata-all.h>
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#include <dev/ofw/openfirm.h>
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#include <powerpc/psim/iobusvar.h>
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/*
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* Define the iobus ata bus attachment. This creates a pseudo-bus that
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* the ATA device can be attached to
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*/
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static int ata_iobus_attach(device_t dev);
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static int ata_iobus_probe(device_t dev);
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static int ata_iobus_print_child(device_t dev, device_t child);
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struct resource *ata_iobus_alloc_resource(device_t, device_t, int, int *,
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u_long, u_long, u_long, u_int);
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static int ata_iobus_release_resource(device_t, device_t, int, int,
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struct resource *);
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static device_method_t ata_iobus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ata_iobus_probe),
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DEVMETHOD(device_attach, ata_iobus_attach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus methods */
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DEVMETHOD(bus_print_child, ata_iobus_print_child),
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DEVMETHOD(bus_alloc_resource, ata_iobus_alloc_resource),
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DEVMETHOD(bus_release_resource, ata_iobus_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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{ 0, 0 }
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};
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static driver_t ata_iobus_driver = {
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"ataiobus",
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ata_iobus_methods,
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0,
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};
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static devclass_t ata_iobus_devclass;
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DRIVER_MODULE(ataiobus, iobus, ata_iobus_driver, ata_iobus_devclass, 0, 0);
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static int
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ata_iobus_probe(device_t dev)
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{
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char *type = iobus_get_name(dev);
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if (strncmp(type, "ata", 3) != 0)
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return (ENXIO);
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device_set_desc(dev, "PSIM ATA Controller");
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return (0);
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}
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static int
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ata_iobus_attach(device_t dev)
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{
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/*
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* Add a single child per controller. Should be able
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* to add two
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*/
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device_add_child(dev, "ata",
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devclass_find_free_unit(ata_devclass, 0));
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return (bus_generic_attach(dev));
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}
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static int
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ata_iobus_print_child(device_t dev, device_t child)
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{
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int retval = 0;
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retval += bus_print_child_header(dev, child);
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/* irq ? */
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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struct resource *
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ata_iobus_alloc_resource(device_t dev, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct resource *res = NULL;
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int myrid;
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u_int *ofw_regs;
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ofw_regs = iobus_get_regs(dev);
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/*
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* The reg array for the PSIM ata device has 6 start/size entries:
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* 0 - unused
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* 1/2/3 - unused
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* 4/5/6 - primary command
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* 7/8/9 - secondary command
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* 10/11/12 - primary control
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* 13/14/15 - secondary control
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* 16/17/18 - primary/secondary dma registers, unimplemented
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*
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* The resource values are calculated from these registers
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*/
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if (type == SYS_RES_IOPORT) {
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switch (*rid) {
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case ATA_IOADDR_RID:
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myrid = 0;
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start = ofw_regs[4];
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end = start + ATA_IOSIZE - 1;
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count = ATA_IOSIZE;
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res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
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SYS_RES_MEMORY, &myrid,
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start, end, count, flags);
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break;
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case ATA_ALTADDR_RID:
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myrid = 0;
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start = ofw_regs[10];
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end = start + ATA_ALTIOSIZE - 1;
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count = ATA_ALTIOSIZE;
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res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
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SYS_RES_MEMORY, &myrid,
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start, end, count, flags);
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break;
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case ATA_BMADDR_RID:
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/* DMA not properly supported by psim */
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break;
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}
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return (res);
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} else if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) {
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/*
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* Pass this on to the parent
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*/
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return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
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SYS_RES_IRQ, rid, 0, ~0, 1, flags));
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} else {
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return (NULL);
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}
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}
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static int
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ata_iobus_release_resource(device_t dev, device_t child, int type, int rid,
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struct resource *r)
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{
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/* no hotplug... */
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return (0);
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}
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/*
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* Define the actual ATA device. This is a sub-bus to the ata-iobus layer
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* to allow the higher layer bus to massage the resource allocation.
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*/
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static int ata_iobus_sub_probe(device_t dev);
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static device_method_t ata_iobus_sub_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ata_iobus_sub_probe),
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DEVMETHOD(device_attach, ata_attach),
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DEVMETHOD(device_detach, ata_detach),
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DEVMETHOD(device_resume, ata_resume),
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{ 0, 0 }
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};
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static driver_t ata_iobus_sub_driver = {
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"ata",
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ata_iobus_sub_methods,
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sizeof(struct ata_channel),
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};
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DRIVER_MODULE(ata, ataiobus, ata_iobus_sub_driver, ata_devclass, 0, 0);
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static void
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ata_iobus_locknoop(struct ata_channel *ch, int type)
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{
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}
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static void
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ata_iobus_setmode(struct ata_device *atadev, int mode)
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{
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atadev->mode = ATA_PIO;
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}
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static int
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ata_iobus_sub_probe(device_t dev)
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{
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struct ata_channel *ch = device_get_softc(dev);
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/* Only a single unit per controller thus far */
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ch->unit = 0;
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ch->flags = (ATA_USE_16BIT|ATA_NO_SLAVE);
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ch->locking = ata_iobus_locknoop;
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ch->device[MASTER].setmode = ata_iobus_setmode;
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ch->device[SLAVE].setmode = ata_iobus_setmode;
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return ata_probe(dev);
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}
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