freebsd-skq/sys/dev/fdt/simplebus.c

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/*-
* Copyright (c) 2009-2010 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Semihalf under sponsorship from
* the FreeBSD Foundation.
*
* 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 "opt_platform.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ktr.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include "fdt_common.h"
#include "fdt_ic_if.h"
#include "ofw_bus_if.h"
#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
printf(fmt,##args); } while (0)
#else
#define debugf(fmt, args...)
#endif
static MALLOC_DEFINE(M_SIMPLEBUS, "simplebus", "simplebus devices information");
struct simplebus_softc {
int sc_addr_cells;
int sc_size_cells;
};
struct simplebus_devinfo {
struct ofw_bus_devinfo di_ofw;
struct resource_list di_res;
/* Interrupts sense-level info for this device */
struct fdt_sense_level di_intr_sl[DI_MAX_INTR_NUM];
};
/*
* Prototypes.
*/
static int simplebus_probe(device_t);
static int simplebus_attach(device_t);
static int simplebus_print_child(device_t, device_t);
static int simplebus_setup_intr(device_t, device_t, struct resource *, int,
driver_filter_t *, driver_intr_t *, void *, void **);
static int simplebus_teardown_intr(device_t, device_t, struct resource *,
void *);
static int simplebus_activate_resource(device_t, device_t, int, int,
struct resource *);
static struct resource *simplebus_alloc_resource(device_t, device_t, int,
int *, u_long, u_long, u_long, u_int);
static int simplebus_deactivate_resource(device_t, device_t, int, int,
struct resource *);
static int simplebus_release_resource(device_t, device_t, int, int,
struct resource *);
static device_t simplebus_get_interrupt_parent(device_t);
static struct resource_list *simplebus_get_resource_list(device_t, device_t);
static ofw_bus_get_devinfo_t simplebus_get_devinfo;
/*
* Bus interface definition.
*/
static device_method_t simplebus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, simplebus_probe),
DEVMETHOD(device_attach, simplebus_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, simplebus_print_child),
DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource),
DEVMETHOD(bus_release_resource, simplebus_release_resource),
DEVMETHOD(bus_activate_resource, simplebus_activate_resource),
DEVMETHOD(bus_deactivate_resource, simplebus_deactivate_resource),
DEVMETHOD(bus_setup_intr, simplebus_setup_intr),
DEVMETHOD(bus_teardown_intr, simplebus_teardown_intr),
DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list),
/* OFW bus interface */
DEVMETHOD(ofw_bus_get_devinfo, simplebus_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),
{ 0, 0 }
};
static driver_t simplebus_driver = {
"simplebus",
simplebus_methods,
sizeof(struct simplebus_softc)
};
devclass_t simplebus_devclass;
DRIVER_MODULE(simplebus, nexus, simplebus_driver, simplebus_devclass, 0, 0);
DRIVER_MODULE(simplebus, simplebus, simplebus_driver, simplebus_devclass, 0,
0);
static int
simplebus_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "simple-bus"))
return (ENXIO);
device_set_desc(dev, "Flattened device tree simple bus");
return (BUS_PROBE_GENERIC);
}
static int
simplebus_attach(device_t dev)
{
device_t dev_child;
struct simplebus_devinfo *di;
struct simplebus_softc *sc;
phandle_t dt_node, dt_child;
sc = device_get_softc(dev);
/*
* Walk simple-bus and add direct subordinates as our children.
*/
dt_node = ofw_bus_get_node(dev);
for (dt_child = OF_child(dt_node); dt_child != 0;
dt_child = OF_peer(dt_child)) {
/* Check and process 'status' property. */
if (!(fdt_is_enabled(dt_child)))
continue;
if (!(fdt_pm_is_enabled(dt_child)))
continue;
di = malloc(sizeof(*di), M_SIMPLEBUS, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) {
free(di, M_SIMPLEBUS);
device_printf(dev, "could not set up devinfo\n");
continue;
}
resource_list_init(&di->di_res);
if (fdt_reg_to_rl(dt_child, &di->di_res)) {
device_printf(dev,
"%s: could not process 'reg' "
"property\n", di->di_ofw.obd_name);
ofw_bus_gen_destroy_devinfo(&di->di_ofw);
free(di, M_SIMPLEBUS);
continue;
}
if (fdt_intr_to_rl(dev, dt_child, &di->di_res, di->di_intr_sl)) {
device_printf(dev, "%s: could not process "
"'interrupts' property\n", di->di_ofw.obd_name);
resource_list_free(&di->di_res);
ofw_bus_gen_destroy_devinfo(&di->di_ofw);
free(di, M_SIMPLEBUS);
continue;
}
/* Add newbus device for this FDT node */
dev_child = device_add_child(dev, NULL, -1);
if (dev_child == NULL) {
device_printf(dev, "could not add child: %s\n",
di->di_ofw.obd_name);
resource_list_free(&di->di_res);
ofw_bus_gen_destroy_devinfo(&di->di_ofw);
free(di, M_SIMPLEBUS);
continue;
}
#ifdef DEBUG
device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name);
#endif
device_set_ivars(dev_child, di);
}
return (bus_generic_attach(dev));
}
static int
simplebus_print_child(device_t dev, device_t child)
{
device_t ip;
struct simplebus_devinfo *di;
struct resource_list *rl;
int rv;
di = device_get_ivars(child);
rl = &di->di_res;
rv = 0;
rv += bus_print_child_header(dev, child);
rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
if ((ip = simplebus_get_interrupt_parent(child)) != NULL)
rv += printf(" (%s)", device_get_nameunit(ip));
rv += bus_print_child_footer(dev, child);
return (rv);
}
static struct resource *
simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
device_t ic;
struct simplebus_devinfo *di;
struct resource_list_entry *rle;
/*
* Request for the default allocation with a given rid: use resource
* list stored in the local device info.
*/
if ((start == 0UL) && (end == ~0UL)) {
if ((di = device_get_ivars(child)) == NULL)
return (NULL);
if (type == SYS_RES_IOPORT)
type = SYS_RES_MEMORY;
rle = resource_list_find(&di->di_res, type, *rid);
if (rle == NULL) {
if (bootverbose)
device_printf(bus, "no default resources for "
"rid = %d, type = %d\n", *rid, type);
return (NULL);
}
start = rle->start;
end = rle->end;
count = rle->count;
}
if (type == SYS_RES_IRQ &&
(ic = simplebus_get_interrupt_parent(child)) != NULL)
return(FDT_IC_ALLOC_INTR(ic, child, rid, start, flags));
return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
count, flags));
}
static int
simplebus_activate_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
device_t ic;
if (type == SYS_RES_IRQ &&
(ic = simplebus_get_interrupt_parent(child)) != NULL)
return (FDT_IC_ACTIVATE_INTR(ic, r));
return (bus_generic_activate_resource(dev, child, type, rid, r));
}
static int
simplebus_deactivate_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
device_t ic;
if (type == SYS_RES_IRQ &&
(ic = simplebus_get_interrupt_parent(child)) != NULL)
return (FDT_IC_DEACTIVATE_INTR(ic, r));
return (bus_generic_deactivate_resource(dev, child, type, rid, r));
}
static int
simplebus_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
device_t ic;
if (type == SYS_RES_IRQ &&
(ic = simplebus_get_interrupt_parent(child)) != NULL)
return (FDT_IC_RELEASE_INTR(ic, r));
return (bus_generic_release_resource(dev, child, type, rid, r));
}
static struct resource_list *
simplebus_get_resource_list(device_t bus, device_t child)
{
struct simplebus_devinfo *di;
di = device_get_ivars(child);
return (&di->di_res);
}
static device_t
simplebus_get_interrupt_parent(device_t dev)
{
struct simplebus_devinfo *di;
struct fdt_ic *ic;
device_t ip;
phandle_t ph, iph;
ip = NULL;
di = device_get_ivars(dev);
if (di == NULL)
return (NULL);
if (OF_getencprop(di->di_ofw.obd_node, "interrupt-parent", &iph,
sizeof(iph)) > 0) {
ph = OF_xref_phandle(iph);
SLIST_FOREACH(ic, &fdt_ic_list_head, fdt_ics) {
if (ic->iph == ph) {
ip = ic->dev;
break;
}
}
}
return (ip);
}
static int
simplebus_setup_intr(device_t bus, device_t child, struct resource *res,
int flags, driver_filter_t *filter, driver_intr_t *ihand, void *arg,
void **cookiep)
{
struct simplebus_devinfo *di;
device_t ic;
enum intr_trigger trig;
enum intr_polarity pol;
int error, irq, rid;
di = device_get_ivars(child);
if (di == NULL)
return (ENXIO);
if (res == NULL)
return (EINVAL);
rid = rman_get_rid(res);
if (rid >= DI_MAX_INTR_NUM)
return (ENOENT);
ic = simplebus_get_interrupt_parent(child);
trig = di->di_intr_sl[rid].trig;
pol = di->di_intr_sl[rid].pol;
if (trig != INTR_TRIGGER_CONFORM || pol != INTR_POLARITY_CONFORM) {
irq = rman_get_start(res);
if (ic != NULL)
error = FDT_IC_CONFIG_INTR(ic, irq, trig, pol);
else
error = bus_generic_config_intr(bus, irq, trig, pol);
if (error)
return (error);
}
if (ic != NULL)
error = FDT_IC_SETUP_INTR(ic, child, res, flags, filter,
ihand, arg, cookiep);
else
error = bus_generic_setup_intr(bus, child, res, flags, filter,
ihand, arg, cookiep);
return (error);
}
static int
simplebus_teardown_intr(device_t bus, device_t child, struct resource *res,
void *cookie)
{
device_t ic;
if ((ic = simplebus_get_interrupt_parent(child)) != NULL)
return (FDT_IC_TEARDOWN_INTR(ic, child, res, cookie));
return (bus_generic_teardown_intr(bus, child, res, cookie));
}
static const struct ofw_bus_devinfo *
simplebus_get_devinfo(device_t bus, device_t child)
{
struct simplebus_devinfo *di;
di = device_get_ivars(child);
return (&di->di_ofw);
}