[src/trunk]: src/sys/dev/fdt add FDT "qemu, fw-cfg-mmio" glue for qemufwcfg

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

details:   https://anonhg.NetBSD.org/src/rev/adde64ab0ef2
branches:  trunk
changeset: 362549:adde64ab0ef2
user:      jakllsch <jakllsch%NetBSD.org@localhost>
date:      Fri Jun 15 15:07:56 2018 +0000

description:
add FDT "qemu,fw-cfg-mmio" glue for qemufwcfg

diffstat:

 sys/dev/fdt/files.fdt       |   6 ++-
 sys/dev/fdt/qemufwcfg_fdt.c |  93 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 98 insertions(+), 1 deletions(-)

diffs (114 lines):

diff -r 00f8d619f46e -r adde64ab0ef2 sys/dev/fdt/files.fdt
--- a/sys/dev/fdt/files.fdt     Fri Jun 15 15:00:14 2018 +0000
+++ b/sys/dev/fdt/files.fdt     Fri Jun 15 15:07:56 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.29 2018/06/06 20:35:36 jakllsch Exp $
+# $NetBSD: files.fdt,v 1.30 2018/06/15 15:07:56 jakllsch Exp $
 
 include        "external/bsd/libfdt/conf/files.libfdt"
 
@@ -95,3 +95,7 @@
 # Virtio virtio,mmio
 attach virtio at fdt with virtio_mmio_fdt:     virtio_mmio
 file   dev/fdt/virtio_mmio_fdt.c               virtio_mmio_fdt
+
+# QEMU Firmware Configuration (fw_cfg) device
+attach         qemufwcfg at fdt with qemufwcfg_fdt
+file   dev/fdt/qemufwcfg_fdt.c                 qemufwcfg_fdt
diff -r 00f8d619f46e -r adde64ab0ef2 sys/dev/fdt/qemufwcfg_fdt.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/qemufwcfg_fdt.c       Fri Jun 15 15:07:56 2018 +0000
@@ -0,0 +1,93 @@
+/* $NetBSD: qemufwcfg_fdt.c,v 1.1 2018/06/15 15:07:56 jakllsch Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * 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 ``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 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: qemufwcfg_fdt.c,v 1.1 2018/06/15 15:07:56 jakllsch Exp $");
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/mutex.h>
+#include <sys/bus.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#include <dev/ic/qemufwcfgvar.h>
+
+static int     fwcfg_fdt_match(device_t, cfdata_t, void *);
+static void    fwcfg_fdt_attach(device_t, device_t, void *);
+
+CFATTACH_DECL_NEW(qemufwcfg_fdt, sizeof(struct fwcfg_softc),
+    fwcfg_fdt_match,
+    fwcfg_fdt_attach,
+    NULL,
+    NULL
+);
+
+static const char * const compatible[] = {
+       "qemu,fw-cfg-mmio",
+       NULL
+};
+
+
+static int
+fwcfg_fdt_match(device_t parent, cfdata_t match, void *opaque)
+{
+       struct fdt_attach_args * const faa = opaque;
+
+       return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+fwcfg_fdt_attach(device_t parent, device_t self, void *opaque)
+{
+       struct fwcfg_softc *sc = device_private(self);
+       struct fdt_attach_args * const faa = opaque;
+       bus_addr_t base;
+       bus_size_t size;
+
+       if (fdtbus_get_reg(faa->faa_phandle, 0, &base, &size) != 0) {
+               aprint_error_dev(self, "couldn't get registers\n");
+               return;
+       }
+
+       sc->sc_dev = self;
+       sc->sc_bst = faa->faa_bst;
+
+       if (bus_space_map(sc->sc_bst, base, size, 0, &sc->sc_bsh) != 0) {
+               aprint_error_dev(self, "couldn't map registers\n");
+               return;
+       }
+
+       aprint_naive("\n");
+       aprint_normal("\n");
+
+       fwcfg_attach(sc);
+
+       pmf_device_register(self, NULL, NULL);
+}