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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/send/@/powerpc/psim/iobus.c |
/*-
* Copyright 2002 by Peter Grehan. 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 of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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: release/9.1.0/sys/powerpc/psim/iobus.c 183882 2008-10-14 14:54:14Z nwhitehorn $
*/
/*
* PSIM 'iobus' local bus. Should be set up in the device tree like:
*
* /iobus@0x80000000/name psim-iobus
*
* Code borrowed from various nexus.c and uninorth.c :-)
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/vmparam.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/pmap.h>
#include <machine/resource.h>
#include <powerpc/psim/iobusvar.h>
struct iobus_softc {
phandle_t sc_node;
vm_offset_t sc_addr;
vm_offset_t sc_size;
struct rman sc_mem_rman;
};
static MALLOC_DEFINE(M_IOBUS, "iobus", "iobus device information");
static int iobus_probe(device_t);
static int iobus_attach(device_t);
static int iobus_print_child(device_t dev, device_t child);
static void iobus_probe_nomatch(device_t, device_t);
static int iobus_read_ivar(device_t, device_t, int, uintptr_t *);
static int iobus_write_ivar(device_t, device_t, int, uintptr_t);
static struct resource *iobus_alloc_resource(device_t, device_t, int, int *,
u_long, u_long, u_long, u_int);
static int iobus_activate_resource(device_t, device_t, int, int,
struct resource *);
static int iobus_deactivate_resource(device_t, device_t, int, int,
struct resource *);
static int iobus_release_resource(device_t, device_t, int, int,
struct resource *);
/*
* Bus interface definition
*/
static device_method_t iobus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, iobus_probe),
DEVMETHOD(device_attach, iobus_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, iobus_print_child),
DEVMETHOD(bus_probe_nomatch, iobus_probe_nomatch),
DEVMETHOD(bus_read_ivar, iobus_read_ivar),
DEVMETHOD(bus_write_ivar, iobus_write_ivar),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_alloc_resource, iobus_alloc_resource),
DEVMETHOD(bus_release_resource, iobus_release_resource),
DEVMETHOD(bus_activate_resource, iobus_activate_resource),
DEVMETHOD(bus_deactivate_resource, iobus_deactivate_resource),
{ 0, 0 }
};
static driver_t iobus_driver = {
"iobus",
iobus_methods,
sizeof(struct iobus_softc)
};
devclass_t iobus_devclass;
DRIVER_MODULE(iobus, nexus, iobus_driver, iobus_devclass, 0, 0);
static int
iobus_probe(device_t dev)
{
const char *type = ofw_bus_get_name(dev);
if (strcmp(type, "psim-iobus") != 0)
return (ENXIO);
device_set_desc(dev, "PSIM local bus");
return (0);
}
/*
* Add interrupt/addr range to the dev's resource list if present
*/
static void
iobus_add_intr(phandle_t devnode, struct iobus_devinfo *dinfo)
{
u_int intr = -1;
if (OF_getprop(devnode, "interrupt", &intr, sizeof(intr)) != -1) {
resource_list_add(&dinfo->id_resources,
SYS_RES_IRQ, 0, intr, intr, 1);
}
dinfo->id_interrupt = intr;
}
static void
iobus_add_reg(phandle_t devnode, struct iobus_devinfo *dinfo,
vm_offset_t iobus_off)
{
u_int size;
int i;
size = OF_getprop(devnode, "reg", dinfo->id_reg,sizeof(dinfo->id_reg));
if (size != -1) {
dinfo->id_nregs = size / (sizeof(dinfo->id_reg[0]));
for (i = 0; i < dinfo->id_nregs; i+= 3) {
/*
* Scale the absolute addresses back to iobus
* relative offsets. This is to better simulate
* macio
*/
dinfo->id_reg[i+1] -= iobus_off;
resource_list_add(&dinfo->id_resources,
SYS_RES_MEMORY, 0,
dinfo->id_reg[i+1],
dinfo->id_reg[i+1] +
dinfo->id_reg[i+2],
dinfo->id_reg[i+2]);
}
}
}
static int
iobus_attach(device_t dev)
{
struct iobus_softc *sc;
struct iobus_devinfo *dinfo;
phandle_t root;
phandle_t child;
device_t cdev;
char *name;
u_int reg[2];
int size;
sc = device_get_softc(dev);
sc->sc_node = ofw_bus_get_node(dev);
/*
* Find the base addr/size of the iobus, and initialize the
* resource manager
*/
size = OF_getprop(sc->sc_node, "reg", reg, sizeof(reg));
if (size == sizeof(reg)) {
sc->sc_addr = reg[0];
sc->sc_size = reg[1];
} else {
return (ENXIO);
}
sc->sc_mem_rman.rm_type = RMAN_ARRAY;
sc->sc_mem_rman.rm_descr = "IOBus Device Memory";
if (rman_init(&sc->sc_mem_rman) != 0) {
device_printf(dev,
"failed to init mem range resources\n");
return (ENXIO);
}
rman_manage_region(&sc->sc_mem_rman, 0, sc->sc_size);
/*
* Iterate through the sub-devices
*/
root = sc->sc_node;
for (child = OF_child(root); child != 0; child = OF_peer(child)) {
OF_getprop_alloc(child, "name", 1, (void **)&name);
cdev = device_add_child(dev, NULL, -1);
if (cdev != NULL) {
dinfo = malloc(sizeof(*dinfo), M_IOBUS, M_WAITOK);
memset(dinfo, 0, sizeof(*dinfo));
resource_list_init(&dinfo->id_resources);
dinfo->id_node = child;
dinfo->id_name = name;
iobus_add_intr(child, dinfo);
iobus_add_reg(child, dinfo, sc->sc_addr);
device_set_ivars(cdev, dinfo);
} else {
free(name, M_OFWPROP);
}
}
return (bus_generic_attach(dev));
}
static int
iobus_print_child(device_t dev, device_t child)
{
struct iobus_devinfo *dinfo;
struct resource_list *rl;
int retval = 0;
dinfo = device_get_ivars(child);
rl = &dinfo->id_resources;
retval += bus_print_child_header(dev, child);
retval += printf(" offset 0x%x", dinfo->id_reg[1]);
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
retval += bus_print_child_footer(dev, child);
return (retval);
}
static void
iobus_probe_nomatch(device_t dev, device_t child)
{
}
static int
iobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct iobus_devinfo *dinfo;
if ((dinfo = device_get_ivars(child)) == 0)
return (ENOENT);
switch (which) {
case IOBUS_IVAR_NODE:
*result = dinfo->id_node;
break;
case IOBUS_IVAR_NAME:
*result = (uintptr_t)dinfo->id_name;
break;
case IOBUS_IVAR_NREGS:
*result = dinfo->id_nregs;
break;
case IOBUS_IVAR_REGS:
*result = (uintptr_t)dinfo->id_reg;
break;
default:
return (ENOENT);
}
return (0);
}
static int
iobus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
return (EINVAL);
}
static struct resource *
iobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct iobus_softc *sc;
int needactivate;
struct resource *rv;
struct rman *rm;
sc = device_get_softc(bus);
needactivate = flags & RF_ACTIVE;
flags &= ~RF_ACTIVE;
switch (type) {
case SYS_RES_MEMORY:
case SYS_RES_IOPORT:
rm = &sc->sc_mem_rman;
break;
case SYS_RES_IRQ:
return (bus_alloc_resource(bus, type, rid, start, end, count,
flags));
default:
device_printf(bus, "unknown resource request from %s\n",
device_get_nameunit(child));
return (NULL);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == NULL) {
device_printf(bus, "failed to reserve resource for %s\n",
device_get_nameunit(child));
return (NULL);
}
rman_set_rid(rv, *rid);
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv) != 0) {
device_printf(bus,
"failed to activate resource for %s\n",
device_get_nameunit(child));
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
iobus_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
if (rman_get_flags(res) & RF_ACTIVE) {
int error = bus_deactivate_resource(child, type, rid, res);
if (error)
return error;
}
return (rman_release_resource(res));
}
static int
iobus_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
struct iobus_softc *sc;
void *p;
sc = device_get_softc(bus);
if (type == SYS_RES_IRQ)
return (bus_activate_resource(bus, type, rid, res));
if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
p = pmap_mapdev((vm_offset_t)rman_get_start(res) + sc->sc_addr,
(vm_size_t)rman_get_size(res));
if (p == NULL)
return (ENOMEM);
rman_set_virtual(res, p);
rman_set_bustag(res, &bs_le_tag);
rman_set_bushandle(res, (u_long)p);
}
return (rman_activate_resource(res));
}
static int
iobus_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
/*
* If this is a memory resource, unmap it.
*/
if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
u_int32_t psize;
psize = rman_get_size(res);
pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
}
return (rman_deactivate_resource(res));
}