Merge Perforce changeset 219941 to head:

  Copy altera_avgen(4) nexus attachment as a starting point for an
  FDT attachment.

Sponsored by:	DARPA, AFRL

1 files changed, 143 insertions, 0 deletions

diff --git a/sys/dev/altera/avgen/altera_avgen_fdt.c b/sys/dev/altera/avgen/altera_avgen_fdt.c
new file mode 100644
index 0000000..38dd446
--- /dev/null
+++ b/sys/dev/altera/avgen/altera_avgen_fdt.c
@@ -0,0 +1,143 @@
+/*-
+ * Copyright (c) 2012-2013 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/kernel.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/rman.h>
+#include <sys/stat.h>
+#include <sys/systm.h>
+#include <sys/uio.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <machine/vm.h>
+
+#include <vm/vm.h>
+
+#include <dev/altera/avgen/altera_avgen.h>
+
+static int
+altera_avgen_nexus_probe(device_t dev)
+{
+
+	device_set_desc(dev, "Generic Altera Avalon device attachment");
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+altera_avgen_nexus_attach(device_t dev)
+{
+	struct altera_avgen_softc *sc;
+	const char *str_fileio, *str_mmapio;
+	const char *str_devname;
+	int devunit, error;
+
+	sc = device_get_softc(dev);
+	sc->avg_dev = dev;
+	sc->avg_unit = device_get_unit(dev);
+
+	/*
+	 * Query non-standard hints to find out what operations are permitted
+	 * on the device, and whether it is cached.
+	 */
+	str_fileio = NULL;
+	str_mmapio = NULL;
+	str_devname = NULL;
+	devunit = -1;
+	sc->avg_width = 1;
+	error = resource_int_value(device_get_name(dev), device_get_unit(dev),
+	    ALTERA_AVALON_STR_WIDTH, &sc->avg_width);
+	if (error != 0 && error != ENOENT) {
+		device_printf(dev, "invalid %s\n", ALTERA_AVALON_STR_WIDTH);
+		return (error);
+	}
+	(void)resource_string_value(device_get_name(dev),
+	    device_get_unit(dev), ALTERA_AVALON_STR_FILEIO, &str_fileio);
+	(void)resource_string_value(device_get_name(dev),
+	    device_get_unit(dev), ALTERA_AVALON_STR_MMAPIO, &str_mmapio);
+	(void)resource_string_value(device_get_name(dev),
+	    device_get_unit(dev), ALTERA_AVALON_STR_DEVNAME, &str_devname);
+	(void)resource_int_value(device_get_name(dev), device_get_unit(dev),
+	    ALTERA_AVALON_STR_DEVUNIT, &devunit);
+
+	/* Memory allocation and checking. */
+	sc->avg_rid = 0;
+	sc->avg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+	    &sc->avg_rid, RF_ACTIVE);
+	if (sc->avg_res == NULL) {
+		device_printf(dev, "couldn't map memory\n");
+		return (ENXIO);
+	}
+	error = altera_avgen_attach(sc, str_fileio, str_mmapio, str_devname,
+	    devunit);
+	if (error != 0)
+		bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid,
+		    sc->avg_res);
+	return (error);
+}
+
+static int
+altera_avgen_nexus_detach(device_t dev)
+{
+	struct altera_avgen_softc *sc;
+
+	sc = device_get_softc(dev);
+	altera_avgen_detach(sc);
+	bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res);
+	return (0);
+}
+
+static device_method_t altera_avgen_nexus_methods[] = {
+	DEVMETHOD(device_probe,		altera_avgen_nexus_probe),
+	DEVMETHOD(device_attach,	altera_avgen_nexus_attach),
+	DEVMETHOD(device_detach,	altera_avgen_nexus_detach),
+	{ 0, 0 }
+};
+
+static driver_t altera_avgen_nexus_driver = {
+	"altera_avgen",
+	altera_avgen_nexus_methods,
+	sizeof(struct altera_avgen_softc),
+};
+
+static devclass_t altera_avgen_devclass;
+
+DRIVER_MODULE(avgen, nexus, altera_avgen_nexus_driver, altera_avgen_devclass,
+    0, 0);