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author | rwatson <rwatson@FreeBSD.org> | 2013-01-13 15:10:27 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2013-01-13 15:10:27 +0000 |
commit | e813c09dbf2c5d8078dcdc5ee1c3b55ab8b0faf4 (patch) | |
tree | 76c22eb83adfbb651d49a2a4285d781b0abe789a /sys/dev/terasic | |
parent | 315df478c379f5026e9f6303847654dc5a4531a4 (diff) | |
download | FreeBSD-src-e813c09dbf2c5d8078dcdc5ee1c3b55ab8b0faf4.zip FreeBSD-src-e813c09dbf2c5d8078dcdc5ee1c3b55ab8b0faf4.tar.gz |
Merge Perforce changeset 219921 to head:
Copy DE4 LED nexus bus attachment as a starting point for an FDT
attachment.
Sponsored by: DARPA, AFRL
Diffstat (limited to 'sys/dev/terasic')
-rw-r--r-- | sys/dev/terasic/de4led/terasic_de4led_fdt.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sys/dev/terasic/de4led/terasic_de4led_fdt.c b/sys/dev/terasic/de4led/terasic_de4led_fdt.c new file mode 100644 index 0000000..92da503 --- /dev/null +++ b/sys/dev/terasic/de4led/terasic_de4led_fdt.c @@ -0,0 +1,112 @@ +/*- + * 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); |