Add imxpciephy(4), a driver for the i.MX7D's PCIe PHY, which

is also implemented on the i.MX8MM.  So far this driver is a
glorified regmap provider, which will be used by dwpcie(4).

ok kettenis@

2 files changed, 85 insertions, 1 deletions

diff --git a/sys/dev/fdt/files.fdt b/sys/dev/fdt/files.fdt
index d2555385904..417b408de3f 100644
--- a/sys/dev/fdt/files.fdt
+++ b/sys/dev/fdt/files.fdt
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.fdt,v 1.128 2020/04/25 22:28:12 kettenis Exp $
+#	$OpenBSD: files.fdt,v 1.129 2020/04/26 15:03:04 patrick Exp $
 #
 # Config file and device description for machine-independent FDT code.
 # Included by ports that need it.
@@ -438,6 +438,10 @@ device	imxiomuxc
 attach	imxiomuxc at fdt
 file	dev/fdt/imxiomuxc.c		imxiomuxc
 
+device	imxpciephy
+attach	imxpciephy at fdt
+file	dev/fdt/imxpciephy.c		imxpciephy
+
 device	imxpwm
 attach	imxpwm at fdt
 file	dev/fdt/imxpwm.c		imxpwm
diff --git a/sys/dev/fdt/imxpciephy.c b/sys/dev/fdt/imxpciephy.c
new file mode 100644
index 00000000000..cff4c2c31fd
--- /dev/null
+++ b/sys/dev/fdt/imxpciephy.c
@@ -0,0 +1,80 @@
+/* $OpenBSD: imxpciephy.c,v 1.1 2020/04/26 15:03:04 patrick Exp $ */
+/*
+ * Copyright (c) 2020 Patrick Wildt <patrick@blueri.se>
+ *
+ * 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 <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_misc.h>
+#include <dev/ofw/fdt.h>
+
+struct imxpciephy_softc {
+	struct device		sc_dev;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+};
+
+int	imxpciephy_match(struct device *, void *, void *);
+void	imxpciephy_attach(struct device *, struct device *, void *);
+
+struct cfattach imxpciephy_ca = {
+	sizeof(struct imxpciephy_softc), imxpciephy_match, imxpciephy_attach
+};
+
+struct cfdriver imxpciephy_cd = {
+	NULL, "imxpciephy", DV_DULL
+};
+
+int
+imxpciephy_match(struct device *parent, void *match, void *aux)
+{
+	struct fdt_attach_args *faa = aux;
+	int node = faa->fa_node;
+
+	if (OF_is_compatible(node, "fsl,imx7d-pcie-phy"))
+		return 10;	/* Must beat syscon(4). */
+
+	return 0;
+}
+
+void
+imxpciephy_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct imxpciephy_softc *sc = (struct imxpciephy_softc *)self;
+	struct fdt_attach_args *faa = aux;
+
+	if (faa->fa_nreg < 1) {
+		printf(": no registers\n");
+		return;
+	}
+
+	sc->sc_iot = faa->fa_iot;
+	if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
+	    faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
+		printf(": can't map registers\n");
+		return;
+	}
+
+	regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
+	    faa->fa_reg[0].size);
+
+	printf("\n");
+}