[src/trunk]: src/sys/arch/arm/broadcom Attachment for RNG200

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b652c0af3869
branches:  trunk
changeset: 965090:b652c0af3869
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sun Sep 01 17:27:22 2019 +0000

description:
Attachment for RNG200

diffstat:

 sys/arch/arm/broadcom/bcm2838_rng.c |  92 +++++++++++++++++++++++++++++++++++++
 1 files changed, 92 insertions(+), 0 deletions(-)

diffs (96 lines):

diff -r a102d70a38f4 -r b652c0af3869 sys/arch/arm/broadcom/bcm2838_rng.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/broadcom/bcm2838_rng.c       Sun Sep 01 17:27:22 2019 +0000
@@ -0,0 +1,92 @@
+/*     $NetBSD: bcm2838_rng.c,v 1.1 2019/09/01 17:27:22 mlelstv Exp $ */
+
+/*-
+ * Copyright (c) 2019 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jared D. McNeill
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
+__KERNEL_RCSID(0, "$NetBSD: bcm2838_rng.c,v 1.1 2019/09/01 17:27:22 mlelstv Exp $");
+
+#include <sys/param.h>
+#include <sys/device.h>
+
+#include <dev/ic/rng200var.h>
+#include <dev/fdt/fdtvar.h>
+
+struct bcm2838rng_softc {
+       device_t                sc_dev;
+       struct rng200_softc     sc_rng200;
+};
+
+static int bcm2838rng_match(device_t, cfdata_t, void *);
+static void bcm2838rng_attach(device_t, device_t, void *);
+
+CFATTACH_DECL_NEW(bcm2838rng_fdt, sizeof(struct bcm2838rng_softc),
+    bcm2838rng_match, bcm2838rng_attach, NULL, NULL);
+
+/* ARGSUSED */
+static int
+bcm2838rng_match(device_t parent, cfdata_t match, void *aux)
+{
+       const char * const compatible[] = { "brcm,bcm2838-rng200", NULL };
+       struct fdt_attach_args * const faa = aux;
+
+       return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+bcm2838rng_attach(device_t parent, device_t self, void *aux)
+{
+       struct bcm2838rng_softc *sc = device_private(self);
+       struct fdt_attach_args * const faa = aux;
+       bus_addr_t addr;
+       bus_size_t size;
+       bus_space_handle_t bsh;
+       int error;
+
+       sc->sc_dev = self;
+
+       error = fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size);
+       if (error) {
+               aprint_error_dev(sc->sc_dev, ": couldn't get registers\n");
+               return;
+       }
+
+       if (bus_space_map(faa->faa_bst, addr, size, 0, &bsh)) {
+               aprint_error_dev(sc->sc_dev, ": unable to map device\n");
+               return;
+       }
+
+       aprint_naive("\n");
+       aprint_normal(": Hardware RNG\n");
+
+       sc->sc_rng200.sc_bst = faa->faa_bst;
+       sc->sc_rng200.sc_bsh = bsh;
+       sc->sc_rng200.sc_name = device_xname(sc->sc_dev);
+       rng200_attach(&sc->sc_rng200);
+}