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Merge Perforce changeset 219921 to head:

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Copy DE4 LED nexus bus attachment as a starting point for an FDT
  attachment.

Sponsored by:	DARPA, AFRL
This commit is contained in:
Robert Watson 2013-01-13 15:10:27 +00:00
parent 100bfa3f87
commit 1be4dfd49e
1 changed files with 112 additions and 0 deletions
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112
sys/dev/terasic/de4led/terasic_de4led_fdt.c Normal file
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/*-
* Copyright (c) 2012 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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/bus.h>
#include <sys/condvar.h>
#include <sys/conf.h>
#include <sys/bio.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <dev/terasic/de4led/terasic_de4led.h>
/*
* Nexus bus attachment for the 8-element LED on the Terasic DE-4 FPGA board,
* which is hooked up to the processor via a memory-mapped Avalon bus.
*/
static int
terasic_de4led_nexus_probe(device_t dev)
{
device_set_desc(dev, "Terasic DE4 8-element LED");
return (BUS_PROBE_DEFAULT);
}
static int
terasic_de4led_nexus_attach(device_t dev)
{
struct terasic_de4led_softc *sc;
sc = device_get_softc(dev);
sc->tdl_dev = dev;
sc->tdl_unit = device_get_unit(dev);
sc->tdl_rid = 0;
sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->tdl_rid, RF_ACTIVE);
if (sc->tdl_res == NULL) {
device_printf(dev, "couldn't map memory\n");
return (ENXIO);
}
terasic_de4led_attach(sc);
return (0);
}
static int
terasic_de4led_nexus_detach(device_t dev)
{
struct terasic_de4led_softc *sc;
sc = device_get_softc(dev);
KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated",
__func__));
terasic_de4led_detach(sc);
bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res);
return (0);
}
static device_method_t terasic_de4led_nexus_methods[] = {
DEVMETHOD(device_probe, terasic_de4led_nexus_probe),
DEVMETHOD(device_attach, terasic_de4led_nexus_attach),
DEVMETHOD(device_detach, terasic_de4led_nexus_detach),
{ 0, 0 }
};
static driver_t terasic_de4led_nexus_driver = {
"terasic_de4led",
terasic_de4led_nexus_methods,
sizeof(struct terasic_de4led_softc),
};
static devclass_t terasic_de4led_devclass;
DRIVER_MODULE(terasic_de4led, nexus, terasic_de4led_nexus_driver,
terasic_de4led_devclass, 0, 0);