From 52c516329cd1f45baeb25016c442d7b20314f8cc Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Mon, 24 May 2021 18:40:19 +0000
Subject: [PATCH] Add apldwusb(4), a glue driver for the Synpsys DesignWare USB
 3 controllers found on the Apple M1 SoC.

---
 sys/arch/arm64/conf/GENERIC     |  3 +-
 sys/arch/arm64/conf/RAMDISK     |  3 +-
 sys/arch/arm64/conf/files.arm64 |  6 +++-
 sys/arch/arm64/dev/apldwusb.c   | 64 +++++++++++++++++++++++++++++++++
 4 files changed, 73 insertions(+), 3 deletions(-)
 create mode 100644 sys/arch/arm64/dev/apldwusb.c

diff --git a/sys/arch/arm64/conf/GENERIC b/sys/arch/arm64/conf/GENERIC
index 411c922ae02..d40e65471d9 100644
--- a/sys/arch/arm64/conf/GENERIC
+++ b/sys/arch/arm64/conf/GENERIC
@@ -1,4 +1,4 @@
-# $OpenBSD: GENERIC,v 1.197 2021/05/18 14:25:59 kevlo Exp $
+# $OpenBSD: GENERIC,v 1.198 2021/05/24 18:40:19 kettenis Exp $
 #
 # GENERIC machine description file
 #
@@ -134,6 +134,7 @@ wsdisplay*	at amdgpu?
 # Apple
 apldart*	at fdt?
 apldog*		at fdt? early 1
+apldwusb*	at fdt?
 aplintc*	at fdt? early 1
 aplpcie*	at fdt?
 pci*		at aplpcie?
diff --git a/sys/arch/arm64/conf/RAMDISK b/sys/arch/arm64/conf/RAMDISK
index d9d80a0c7f9..e68e04b570a 100644
--- a/sys/arch/arm64/conf/RAMDISK
+++ b/sys/arch/arm64/conf/RAMDISK
@@ -1,4 +1,4 @@
-# $OpenBSD: RAMDISK,v 1.149 2021/05/14 08:10:39 jsg Exp $
+# $OpenBSD: RAMDISK,v 1.150 2021/05/24 18:40:19 kettenis Exp $
 
 machine		arm64
 maxusers	4
@@ -98,6 +98,7 @@ wsdisplay*	at simplefb?
 # Apple
 apldart*	at fdt?
 apldog*		at fdt? early 1
+apldwusb*	at fdt?
 aplintc*	at fdt? early 1
 aplpcie*	at fdt?
 pci*		at aplpcie?
diff --git a/sys/arch/arm64/conf/files.arm64 b/sys/arch/arm64/conf/files.arm64
index 6b4517f72b9..77fa39b9b9a 100644
--- a/sys/arch/arm64/conf/files.arm64
+++ b/sys/arch/arm64/conf/files.arm64
@@ -1,4 +1,4 @@
-# $OpenBSD: files.arm64,v 1.40 2021/05/18 11:39:37 kettenis Exp $
+# $OpenBSD: files.arm64,v 1.41 2021/05/24 18:40:19 kettenis Exp $
 
 maxpartitions	16
 maxusers	2 8 128
@@ -144,6 +144,10 @@ device	apldog
 attach	apldog at fdt
 file	arch/arm64/dev/apldog.c			apldog
 
+device	apldwusb: fdt
+attach	apldwusb at fdt
+file	arch/arm64/dev/apldwusb.c		apldwusb
+
 device	aplintc
 attach	aplintc at fdt
 file	arch/arm64/dev/aplintc.c		aplintc
diff --git a/sys/arch/arm64/dev/apldwusb.c b/sys/arch/arm64/dev/apldwusb.c
new file mode 100644
index 00000000000..0507498c37e
--- /dev/null
+++ b/sys/arch/arm64/dev/apldwusb.c
@@ -0,0 +1,64 @@
+/*	$OpenBSD: apldwusb.c,v 1.1 2021/05/24 18:40:19 kettenis Exp $	*/
+/*
+ * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <arm64/dev/simplebusvar.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_clock.h>
+#include <dev/ofw/fdt.h>
+
+struct apldwusb_softc {
+	struct simplebus_softc	sc_sbus;
+};
+
+int	apldwusb_match(struct device *, void *, void *);
+void	apldwusb_attach(struct device *, struct device *, void *);
+
+struct cfattach apldwusb_ca = {
+	sizeof(struct apldwusb_softc), apldwusb_match, apldwusb_attach
+};
+
+struct cfdriver apldwusb_cd = {
+	NULL, "apldwusb", DV_DULL
+};
+
+int
+apldwusb_match(struct device *parent, void *match, void *aux)
+{
+	struct fdt_attach_args *faa = aux;
+
+	return OF_is_compatible(faa->fa_node, "apple,dwc3-m1");
+}
+
+void
+apldwusb_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct apldwusb_softc *sc = (struct apldwusb_softc *)self;
+	struct fdt_attach_args *faa = aux;
+
+	clock_enable_all(faa->fa_node);
+	reset_deassert_all(faa->fa_node);
+
+	simplebus_attach(parent, &sc->sc_sbus.sc_dev, faa);
+}
-- 
2.20.1