freebsd-dev/sys/amd64/isa/isa.c
1999-05-08 21:59:43 +00:00

615 lines
16 KiB
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.
*
* $Id: isa.c,v 1.124 1999/05/08 21:28:39 peter Exp $
*/
/*
* Modifications for Intel architecture by Garrett A. Wollman.
* Copyright 1998 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. 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.
*/
#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/resource.h>
#include <isa/isavar.h>
MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
/*
* The structure used to attach devices to the isa bus.
*/
struct isa_device {
int id_port[ISA_NPORT_IVARS];
u_short id_portsize[ISA_NPORT_IVARS];
vm_offset_t id_maddr[ISA_NMEM_IVARS];
vm_size_t id_msize[ISA_NMEM_IVARS];
int id_irq[ISA_NIRQ_IVARS];
int id_drq[ISA_NDRQ_IVARS];
int id_flags;
struct resource *id_portres[ISA_NPORT_IVARS];
struct resource *id_memres[ISA_NMEM_IVARS];
struct resource *id_irqres[ISA_NIRQ_IVARS];
struct resource *id_drqres[ISA_NDRQ_IVARS];
};
#define DEVTOISA(dev) ((struct isa_device *) device_get_ivars(dev))
static devclass_t isa_devclass;
static void
isa_add_device(device_t dev, const char *name, int unit)
{
struct isa_device *idev;
device_t child;
int sensitive, t;
static device_t last_sensitive;
/* device-specific flag overrides any wildcard */
sensitive = 0;
if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
resource_int_value(name, -1, "sensitive", &sensitive);
idev = malloc(sizeof(struct isa_device), M_ISADEV, M_NOWAIT);
if (!idev)
return;
bzero(idev, sizeof *idev);
if (resource_int_value(name, unit, "port", &t) == 0)
idev->id_port[0] = t;
else
idev->id_port[0] = -1;
idev->id_port[1] = 0;
if (resource_int_value(name, unit, "portsize", &t) == 0)
idev->id_portsize[0] = t;
else
idev->id_portsize[0] = 0;
idev->id_portsize[1] = 0;
if (resource_int_value(name, unit, "maddr", &t) == 0)
idev->id_maddr[0] = t;
else
idev->id_maddr[0] = 0;
idev->id_maddr[1] = 0;
if (resource_int_value(name, unit, "msize", &t) == 0)
idev->id_msize[0] = t;
else
idev->id_msize[0] = 0;
idev->id_msize[1] = 0;
if (resource_int_value(name, unit, "flags", &t) == 0)
idev->id_flags = t;
else
idev->id_flags = 0;
if (resource_int_value(name, unit, "irq", &t) == 0)
idev->id_irq[0] = t;
else
idev->id_irq[0] = -1;
idev->id_irq[1] = -1;
if (resource_int_value(name, unit, "drq", &t) == 0)
idev->id_drq[0] = t;
else
idev->id_drq[0] = -1;
idev->id_drq[1] = -1;
if (sensitive)
child = device_add_child_after(dev, last_sensitive, name,
unit, idev);
else
child = device_add_child(dev, name, unit, idev);
if (child == 0)
return;
else if (sensitive)
last_sensitive = child;
if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0)
device_disable(child);
}
/*
* At 'probe' time, we add all the devices which we know about to the
* bus. The generic attach routine will probe and attach them if they
* are alive.
*/
static int
isa_probe(device_t dev)
{
int i;
static char buf[] = "isaXXX";
device_set_desc(dev, "ISA bus");
/*
* Add all devices configured to be attached to isa0.
*/
sprintf(buf, "isa%d", device_get_unit(dev));
for (i = resource_query_string(-1, "at", buf);
i != -1;
i = resource_query_string(i, "at", buf)) {
if (strcmp(resource_query_name(i), "atkbd") == 0)
continue; /* old GENERIC kludge */
isa_add_device(dev, resource_query_name(i),
resource_query_unit(i));
}
/*
* and isa?
*/
for (i = resource_query_string(-1, "at", "isa");
i != -1;
i = resource_query_string(i, "at", "isa")) {
if (strcmp(resource_query_name(i), "atkbd") == 0)
continue; /* old GENERIC kludge */
isa_add_device(dev, resource_query_name(i),
resource_query_unit(i));
}
isa_wrap_old_drivers();
return 0;
}
extern device_t isa_bus_device;
static int
isa_attach(device_t dev)
{
/*
* Arrange for bus_generic_attach(dev) to be called later.
*/
isa_bus_device = dev;
return 0;
}
static void
isa_print_child(device_t bus, device_t dev)
{
struct isa_device *id = DEVTOISA(dev);
if (id->id_port[0] > 0 || id->id_port[1] > 0
|| id->id_maddr[0] > 0 || id->id_maddr[1] > 0
|| id->id_irq[0] >= 0 || id->id_irq[1] >= 0
|| id->id_drq[0] >= 0 || id->id_drq[1] >= 0)
printf(" at");
if (id->id_port[0] > 0 && id->id_port[1] > 0) {
printf(" ports %#x", (u_int)id->id_port[0]);
if (id->id_portsize[0] > 1)
printf("-%#x", (u_int)(id->id_port[0]
+ id->id_portsize[0] - 1));
printf(" and %#x", (u_int)id->id_port[1]);
if (id->id_portsize[1] > 1)
printf("-%#x", (u_int)(id->id_port[1]
+ id->id_portsize[1] - 1));
} else if (id->id_port[0] > 0) {
printf(" port %#x", (u_int)id->id_port[0]);
if (id->id_portsize[0] > 1)
printf("-%#x", (u_int)(id->id_port[0]
+ id->id_portsize[0] - 1));
} else if (id->id_port[1] > 0) {
printf(" port %#x", (u_int)id->id_port[1]);
if (id->id_portsize[1] > 1)
printf("-%#x", (u_int)(id->id_port[1]
+ id->id_portsize[1] - 1));
}
if (id->id_maddr[0] && id->id_maddr[1]) {
printf(" iomem %#x", (u_int)id->id_maddr[0]);
if (id->id_msize[0])
printf("-%#x", (u_int)(id->id_maddr[0]
+ id->id_msize[0] - 1));
printf(" and %#x", (u_int)id->id_maddr[1]);
if (id->id_msize[1])
printf("-%#x", (u_int)(id->id_maddr[1]
+ id->id_msize[1] - 1));
} else if (id->id_maddr[0]) {
printf(" iomem %#x", (u_int)id->id_maddr[0]);
if (id->id_msize[0])
printf("-%#x", (u_int)(id->id_maddr[0]
+ id->id_msize[0] - 1));
} else if (id->id_maddr[1]) {
printf(" iomem %#x", (u_int)id->id_maddr[1]);
if (id->id_msize[1])
printf("-%#x", (u_int)(id->id_maddr[1]
+ id->id_msize[1] - 1));
}
if (id->id_irq[0] >= 0 && id->id_irq[1] >= 0)
printf(" irqs %d and %d", id->id_irq[0], id->id_irq[1]);
else if (id->id_irq[0] >= 0)
printf(" irq %d", id->id_irq[0]);
else if (id->id_irq[1] >= 0)
printf(" irq %d", id->id_irq[1]);
if (id->id_drq[0] >= 0 && id->id_drq[1] >= 0)
printf(" drqs %d and %d", id->id_drq[0], id->id_drq[1]);
else if (id->id_drq[0] >= 0)
printf(" drq %d", id->id_drq[0]);
else if (id->id_drq[1] >= 0)
printf(" drq %d", id->id_drq[1]);
if (id->id_flags)
printf(" flags %#x", id->id_flags);
printf(" on %s%d",
device_get_name(bus), device_get_unit(bus));
}
static int
isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
{
struct isa_device* idev = DEVTOISA(dev);
switch (index) {
case ISA_IVAR_PORT_0:
*result = idev->id_port[0];
break;
case ISA_IVAR_PORT_1:
*result = idev->id_port[1];
break;
case ISA_IVAR_PORTSIZE_0:
*result = idev->id_portsize[0];
break;
case ISA_IVAR_PORTSIZE_1:
*result = idev->id_portsize[1];
break;
case ISA_IVAR_MADDR_0:
*result = idev->id_maddr[0];
break;
case ISA_IVAR_MADDR_1:
*result = idev->id_maddr[1];
break;
case ISA_IVAR_MSIZE_0:
*result = idev->id_msize[0];
break;
case ISA_IVAR_MSIZE_1:
*result = idev->id_msize[1];
break;
case ISA_IVAR_IRQ_0:
*result = idev->id_irq[0];
break;
case ISA_IVAR_IRQ_1:
*result = idev->id_irq[1];
break;
case ISA_IVAR_DRQ_0:
*result = idev->id_drq[0];
break;
case ISA_IVAR_DRQ_1:
*result = idev->id_drq[1];
break;
case ISA_IVAR_FLAGS:
*result = idev->id_flags;
break;
}
return ENOENT;
}
/*
* XXX -- this interface is pretty much irrelevant in the presence of
* BUS_ALLOC_RESOURCE / BUS_RELEASE_RESOURCE (at least for the ivars which
* are defined at this point).
*/
static int
isa_write_ivar(device_t bus, device_t dev,
int index, uintptr_t value)
{
struct isa_device* idev = DEVTOISA(dev);
switch (index) {
case ISA_IVAR_PORT_0:
idev->id_port[0] = value;
break;
case ISA_IVAR_PORT_1:
idev->id_port[1] = value;
break;
case ISA_IVAR_PORTSIZE_0:
idev->id_portsize[0] = value;
break;
case ISA_IVAR_PORTSIZE_1:
idev->id_portsize[1] = value;
break;
case ISA_IVAR_MADDR_0:
idev->id_maddr[0] = value;
break;
case ISA_IVAR_MADDR_1:
idev->id_maddr[1] = value;
break;
case ISA_IVAR_MSIZE_0:
idev->id_msize[0] = value;
break;
case ISA_IVAR_MSIZE_1:
idev->id_msize[1] = value;
break;
case ISA_IVAR_IRQ_0:
idev->id_irq[0] = value;
break;
case ISA_IVAR_IRQ_1:
idev->id_irq[1] = value;
break;
case ISA_IVAR_DRQ_0:
idev->id_drq[0] = value;
break;
case ISA_IVAR_DRQ_1:
idev->id_drq[1] = value;
break;
case ISA_IVAR_FLAGS:
idev->id_flags = value;
break;
default:
return (ENOENT);
}
return (0);
}
/*
* This implementation simply passes the request up to the parent
* bus, which in our case is the special i386 nexus, substituting any
* configured values if the caller defaulted. We can get away with
* this because there is no special mapping for ISA resources on an Intel
* platform. When porting this code to another architecture, it may be
* necessary to interpose a mapping layer here.
*/
static struct resource *
isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
int isdefault;
struct resource *rv, **rvp = 0;
struct isa_device *id = DEVTOISA(child);
if (child) {
/*
* If this is our child, then use the isa_device to find
* defaults and to record results.
*/
if (device_get_devclass(device_get_parent(child)) == isa_devclass)
id = DEVTOISA(child);
else
id = NULL;
} else
id = NULL;
isdefault = (id != NULL && start == 0UL && end == ~0UL && *rid == 0);
if (*rid > 1)
return 0;
switch (type) {
case SYS_RES_IRQ:
if (isdefault && id->id_irq[0] >= 0) {
start = id->id_irq[0];
end = id->id_irq[0];
count = 1;
}
if (id)
rvp = &id->id_irqres[*rid];
break;
case SYS_RES_DRQ:
if (isdefault && id->id_drq[0] >= 0) {
start = id->id_drq[0];
end = id->id_drq[0];
count = 1;
}
if (id)
rvp = &id->id_drqres[*rid];
break;
case SYS_RES_MEMORY:
if (isdefault && id->id_maddr[0]) {
start = id->id_maddr[0];
count = max(count, (u_long)id->id_msize[0]);
end = id->id_maddr[0] + count;
}
if (id)
rvp = &id->id_memres[*rid];
break;
case SYS_RES_IOPORT:
if (isdefault && id->id_port[0]) {
start = id->id_port[0];
count = max(count, (u_long)id->id_portsize[0]);
end = id->id_port[0] + count;
}
if (id)
rvp = &id->id_portres[*rid];
break;
default:
return 0;
}
/*
* If the client attempts to reallocate a resource without
* releasing what was there previously, die horribly so that
* he knows how he !@#$ed up.
*/
if (rvp && *rvp != 0)
panic("%s%d: (%d, %d) not free for %s%d\n",
device_get_name(bus), device_get_unit(bus),
type, *rid,
device_get_name(child), device_get_unit(child));
/*
* nexus_alloc_resource had better not change *rid...
*/
rv = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
start, end, count, flags);
if (rvp && (*rvp = rv) != 0) {
switch (type) {
case SYS_RES_MEMORY:
id->id_maddr[*rid] = rv->r_start;
id->id_msize[*rid] = count;
break;
case SYS_RES_IOPORT:
id->id_port[*rid] = rv->r_start;
id->id_portsize[*rid] = count;
break;
case SYS_RES_IRQ:
id->id_irq[*rid] = rv->r_start;
break;
case SYS_RES_DRQ:
id->id_drq[*rid] = rv->r_start;
break;
}
}
return rv;
}
static int
isa_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
int rv;
struct isa_device *id = DEVTOISA(child);
if (rid > 1)
return EINVAL;
switch (type) {
case SYS_RES_IRQ:
case SYS_RES_DRQ:
case SYS_RES_IOPORT:
case SYS_RES_MEMORY:
break;
default:
return (ENOENT);
}
rv = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
if (rv == 0) {
switch (type) {
case SYS_RES_IRQ:
id->id_irqres[rid] = 0;
break;
case SYS_RES_DRQ:
id->id_drqres[rid] = 0;
break;
case SYS_RES_MEMORY:
id->id_memres[rid] = 0;
break;
case SYS_RES_IOPORT:
id->id_portres[rid] = 0;
break;
default:
return ENOENT;
}
}
return rv;
}
/*
* We can't use the bus_generic_* versions of these methods because those
* methods always pass the bus param as the requesting device, and we need
* to pass the child (the i386 nexus knows about this and is prepared to
* deal).
*/
static int
isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
void (*ihand)(void *), void *arg, void **cookiep)
{
return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
ihand, arg, cookiep));
}
static int
isa_teardown_intr(device_t bus, device_t child, struct resource *r,
void *cookie)
{
return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
}
static device_method_t isa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, isa_probe),
DEVMETHOD(device_attach, isa_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, isa_print_child),
DEVMETHOD(bus_read_ivar, isa_read_ivar),
DEVMETHOD(bus_write_ivar, isa_write_ivar),
DEVMETHOD(bus_alloc_resource, isa_alloc_resource),
DEVMETHOD(bus_release_resource, isa_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, isa_setup_intr),
DEVMETHOD(bus_teardown_intr, isa_teardown_intr),
{ 0, 0 }
};
static driver_t isa_driver = {
"isa",
isa_methods,
1, /* no softc */
};
/*
* ISA can be attached to a PCI-ISA bridge or directly to the nexus.
*/
DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, 0, 0);