/**
* @file
*
* @ingroup rtems_bsd_rtems
*
* @brief TODO.
*/
/*
* Copyright (c) 2009-2015 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* 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 <machine/rtems-bsd-kernel-space.h>
#include <machine/rtems-bsd-thread.h>
#include <rtems/bsd/sys/param.h>
#include <rtems/bsd/sys/types.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <rtems/bsd/bsd.h>
#include <rtems/irq-extension.h>
/* #define DISABLE_INTERRUPT_EXTENSION */
RTEMS_BSD_DECLARE_SET(nexus, rtems_bsd_device);
RTEMS_BSD_DEFINE_SET(nexus, rtems_bsd_device);
RTEMS_STATIC_ASSERT(SYS_RES_MEMORY == RTEMS_BSD_RES_MEMORY, RTEMS_BSD_RES_MEMORY);
RTEMS_STATIC_ASSERT(SYS_RES_IRQ == RTEMS_BSD_RES_IRQ, RTEMS_BSD_RES_IRQ);
static struct rman mem_rman;
static struct rman irq_rman;
static int
nexus_probe(device_t dev)
{
static const char name[] = "IRQS";
rtems_status_code status;
int err;
const rtems_bsd_device *nd;
device_set_desc(dev, "RTEMS Nexus device");
#ifndef DISABLE_INTERRUPT_EXTENSION
status = rtems_interrupt_server_initialize(
rtems_bsd_get_task_priority(name),
rtems_bsd_get_task_stack_size(name),
RTEMS_DEFAULT_MODES,
RTEMS_DEFAULT_ATTRIBUTES,
NULL
);
BSD_ASSERT(status == RTEMS_SUCCESSFUL);
#endif
mem_rman.rm_start = 0;
mem_rman.rm_end = ~0UL;
mem_rman.rm_type = RMAN_ARRAY;
mem_rman.rm_descr = "I/O memory addresses";
err = rman_init(&mem_rman) != 0;
BSD_ASSERT(err == 0);
err = rman_manage_region(&mem_rman, mem_rman.rm_start, mem_rman.rm_end);
BSD_ASSERT(err == 0);
irq_rman.rm_start = 0;
irq_rman.rm_end = ~0UL;
irq_rman.rm_type = RMAN_ARRAY;
irq_rman.rm_descr = "Interrupt vectors";
err = rman_init(&irq_rman) != 0;
BSD_ASSERT(err == 0);
err = rman_manage_region(&irq_rman, irq_rman.rm_start, irq_rman.rm_end);
BSD_ASSERT(err == 0);
SET_FOREACH(nd, nexus) {
device_add_child(dev, nd->name, nd->unit);
}
return (0);
}
static bool
nexus_get_start(const rtems_bsd_device *nd, int type, u_long *start)
{
u_long sr = *start;
size_t i;
for (i = 0; i < nd->resource_count; ++i) {
const rtems_bsd_device_resource *dr = &nd->resources[i];
if (dr->type == type && dr->start_request == sr) {
*start = dr->start_actual;
return (true);
}
}
return (false);
}
static struct resource *
nexus_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 rman *rm;
const rtems_bsd_device *nd;
switch (type) {
case SYS_RES_MEMORY:
rm = &mem_rman;
break;
case SYS_RES_IRQ:
rm = &irq_rman;
break;
default:
return (NULL);
}
SET_FOREACH(nd, nexus) {
if (strcmp(device_get_name(child), nd->name) == 0
&& device_get_unit(child) == nd->unit) {
struct resource *res = NULL;
if (nexus_get_start(nd, type, &start)) {
res = rman_reserve_resource(rm, start, end,
count, flags, child);
if (res != NULL) {
rman_set_rid(res, *rid);
rman_set_bushandle(res,
rman_get_start(res));
}
};
return (res);
}
}
return (NULL);
}
static int
nexus_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
return (rman_release_resource(res));
}
struct nexus_intr {
driver_filter_t *filt;
driver_intr_t *intr;
void *arg;
};
static void
nexus_intr_with_filter(void *arg)
{
struct nexus_intr *ni;
int status;
ni = arg;
status = (*ni->filt)(ni->arg);
if ((status & FILTER_SCHEDULE_THREAD) != 0) {
(*ni->intr)(ni->arg);
}
}
static int
nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
{
int err;
#ifndef DISABLE_INTERRUPT_EXTENSION
struct nexus_intr *ni;
ni = malloc(sizeof(*ni), M_TEMP, M_WAITOK);
if (ni != NULL) {
rtems_status_code sc;
rtems_interrupt_handler rh;
void *ra;
ni->filt = filt;
ni->intr = intr;
ni->arg = arg;
*cookiep = ni;
if (filt == NULL) {
rh = intr;
ra = arg;
} else {
rh = nexus_intr_with_filter;
ra = ni;
}
sc = rtems_interrupt_server_handler_install(RTEMS_ID_NONE,
rman_get_start(res), device_get_nameunit(child),
RTEMS_INTERRUPT_UNIQUE, rh, ra);
if (sc == RTEMS_SUCCESSFUL) {
err = 0;
} else {
free(ni, M_TEMP);
err = EINVAL;
}
} else {
err = ENOMEM;
}
#else
err = EINVAL;
#endif
return (err);
}
static int
nexus_teardown_intr(device_t dev, device_t child, struct resource *res,
void *cookie)
{
int err;
#ifndef DISABLE_INTERRUPT_EXTENSION
struct nexus_intr *ni;
rtems_status_code sc;
rtems_interrupt_handler rh;
void *ra;
ni = cookie;
if (ni->filt == NULL) {
rh = ni->intr;
ra = ni->arg;
} else {
rh = nexus_intr_with_filter;
ra = ni->arg;
}
sc = rtems_interrupt_server_handler_install(RTEMS_ID_NONE,
rman_get_start(res), device_get_nameunit(child),
RTEMS_INTERRUPT_UNIQUE, rh, ra);
err = sc == RTEMS_SUCCESSFUL ? 0 : EINVAL;
#else
err = EINVAL;
#endif
return (err);
}
static device_method_t nexus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_probe),
DEVMETHOD(device_attach, bus_generic_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, bus_generic_print_child),
DEVMETHOD(bus_add_child, bus_generic_add_child),
DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
DEVMETHOD(bus_release_resource, nexus_release_resource),
DEVMETHOD(bus_setup_intr, nexus_setup_intr),
DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
{ 0, 0 }
};
static driver_t nexus_driver = {
.name = "nexus",
.methods = nexus_methods,
.size = 0
};
static devclass_t nexus_devclass;
DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
