freebsd-dev/sys/sparc64/central/central.c
2011-11-22 21:55:40 +00:00

300 lines
8.4 KiB
C

/*-
* Copyright (c) 2003 Jake Burkholder.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <sparc64/sbus/ofw_sbus.h>
struct central_devinfo {
struct ofw_bus_devinfo cdi_obdinfo;
struct resource_list cdi_rl;
};
struct central_softc {
int sc_nrange;
struct sbus_ranges *sc_ranges;
};
static device_probe_t central_probe;
static device_attach_t central_attach;
static bus_print_child_t central_print_child;
static bus_probe_nomatch_t central_probe_nomatch;
static bus_alloc_resource_t central_alloc_resource;
static bus_adjust_resource_t central_adjust_resource;
static bus_get_resource_list_t central_get_resource_list;
static ofw_bus_get_devinfo_t central_get_devinfo;
static int central_print_res(struct central_devinfo *);
static device_method_t central_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, central_probe),
DEVMETHOD(device_attach, central_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, central_print_child),
DEVMETHOD(bus_probe_nomatch, central_probe_nomatch),
DEVMETHOD(bus_alloc_resource, central_alloc_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_adjust_resource, central_adjust_resource),
DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
DEVMETHOD(bus_get_resource_list, central_get_resource_list),
DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_devinfo, central_get_devinfo),
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
DEVMETHOD_END
};
static driver_t central_driver = {
"central",
central_methods,
sizeof(struct central_softc),
};
static devclass_t central_devclass;
EARLY_DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0,
BUS_PASS_BUS);
MODULE_DEPEND(fhc, nexus, 1, 1, 1);
MODULE_VERSION(central, 1);
static int
central_probe(device_t dev)
{
if (strcmp(ofw_bus_get_name(dev), "central") == 0) {
device_set_desc(dev, "central");
return (0);
}
return (ENXIO);
}
static int
central_attach(device_t dev)
{
struct central_devinfo *cdi;
struct sbus_regs *reg;
struct central_softc *sc;
phandle_t child;
phandle_t node;
device_t cdev;
int nreg;
int i;
sc = device_get_softc(dev);
node = ofw_bus_get_node(dev);
sc->sc_nrange = OF_getprop_alloc(node, "ranges",
sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
if (sc->sc_nrange == -1) {
device_printf(dev, "can't get ranges\n");
return (ENXIO);
}
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&cdi->cdi_obdinfo, child) != 0) {
free(cdi, M_DEVBUF);
continue;
}
nreg = OF_getprop_alloc(child, "reg", sizeof(*reg),
(void **)&reg);
if (nreg == -1) {
device_printf(dev, "<%s>: incomplete\n",
cdi->cdi_obdinfo.obd_name);
ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo);
free(cdi, M_DEVBUF);
continue;
}
resource_list_init(&cdi->cdi_rl);
for (i = 0; i < nreg; i++)
resource_list_add(&cdi->cdi_rl, SYS_RES_MEMORY, i,
reg[i].sbr_offset, reg[i].sbr_offset +
reg[i].sbr_size, reg[i].sbr_size);
free(reg, M_OFWPROP);
cdev = device_add_child(dev, NULL, -1);
if (cdev == NULL) {
device_printf(dev, "<%s>: device_add_child failed\n",
cdi->cdi_obdinfo.obd_name);
resource_list_free(&cdi->cdi_rl);
ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo);
free(cdi, M_DEVBUF);
continue;
}
device_set_ivars(cdev, cdi);
}
return (bus_generic_attach(dev));
}
static int
central_adjust_resource(device_t bus __unused, device_t child __unused,
int type __unused, struct resource *r __unused, u_long start __unused,
u_long end __unused)
{
return (ENXIO);
}
static int
central_print_child(device_t dev, device_t child)
{
int rv;
rv = bus_print_child_header(dev, child);
rv += central_print_res(device_get_ivars(child));
rv += bus_print_child_footer(dev, child);
return (rv);
}
static void
central_probe_nomatch(device_t dev, device_t child)
{
const char *type;
device_printf(dev, "<%s>", ofw_bus_get_name(child));
central_print_res(device_get_ivars(child));
type = ofw_bus_get_type(child);
printf(" type %s (no driver attached)\n",
type != NULL ? type : "unknown");
}
static struct resource *
central_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 resource_list *rl;
struct resource_list_entry *rle;
struct central_softc *sc;
struct resource *res;
bus_addr_t coffset;
bus_addr_t cend;
bus_addr_t phys;
int isdefault;
int passthrough;
int i;
isdefault = (start == 0UL && end == ~0UL);
passthrough = (device_get_parent(child) != bus);
res = NULL;
rle = NULL;
rl = BUS_GET_RESOURCE_LIST(bus, child);
sc = device_get_softc(bus);
switch (type) {
case SYS_RES_IRQ:
return (resource_list_alloc(rl, bus, child, type, rid, start,
end, count, flags));
case SYS_RES_MEMORY:
if (!passthrough) {
rle = resource_list_find(rl, type, *rid);
if (rle == NULL)
return (NULL);
if (rle->res != NULL)
panic("%s: resource entry is busy", __func__);
if (isdefault) {
start = rle->start;
count = ulmax(count, rle->count);
end = ulmax(rle->end, start + count - 1);
}
}
for (i = 0; i < sc->sc_nrange; i++) {
coffset = sc->sc_ranges[i].coffset;
cend = coffset + sc->sc_ranges[i].size - 1;
if (start >= coffset && end <= cend) {
start -= coffset;
end -= coffset;
phys = sc->sc_ranges[i].poffset |
((bus_addr_t)sc->sc_ranges[i].pspace << 32);
res = bus_generic_alloc_resource(bus, child,
type, rid, phys + start, phys + end,
count, flags);
if (!passthrough)
rle->res = res;
break;
}
}
break;
}
return (res);
}
static struct resource_list *
central_get_resource_list(device_t bus, device_t child)
{
struct central_devinfo *cdi;
cdi = device_get_ivars(child);
return (&cdi->cdi_rl);
}
static const struct ofw_bus_devinfo *
central_get_devinfo(device_t bus, device_t child)
{
struct central_devinfo *cdi;
cdi = device_get_ivars(child);
return (&cdi->cdi_obdinfo);
}
static int
central_print_res(struct central_devinfo *cdi)
{
return (resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY,
"%#lx"));
}