Add a driver to provide access to imx6 on-chip one-time-programmble data.

Submitted by:	Steven Lawrance <stl@koffein.net>

sys/arm/freescale/imx/files.imx6

@@ -22,6 +22,8 @@ arm/freescale/imx/imx6_anatop.c		standard
 arm/freescale/imx/imx6_ccm.c		standard
 arm/freescale/imx/imx6_machdep.c	standard
 arm/freescale/imx/imx6_pl310.c		standard
+arm/freescale/imx/imx6_ocotp.c		standard
+arm/freescale/imx/imx6_tempmon.c	standard
 arm/freescale/imx/imx_machdep.c		standard
 arm/freescale/imx/imx_gpt.c		standard
 

sys/arm/freescale/imx/imx6_ocotp.c

@@ -0,0 +1,155 @@
+/*-
+ * Copyright (c) 2014 Steven Lawrance <stl@koffein.net>
+ * 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 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("$FreeBSD$");
+
+/*
+ * Access to the Freescale i.MX6 On-Chip One-Time-Programmable Memory
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+
+#include <arm/freescale/imx/imx6_ocotpreg.h>
+#include <arm/freescale/imx/imx6_ocotpvar.h>
+#include <arm/freescale/imx/imx_machdep.h>
+
+struct ocotp_softc {
+	device_t	dev;
+	struct resource	*mem_res;
+};
+
+static struct ocotp_softc *ocotp_sc;
+
+static inline uint32_t
+RD4(struct ocotp_softc *sc, bus_size_t off)
+{
+	return (bus_read_4(sc->mem_res, off));
+}
+
+
+static int
+ocotp_detach(device_t dev)
+{
+	struct ocotp_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	if (sc->mem_res != NULL)
+		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
+
+	ocotp_sc = NULL;
+
+	return (0);
+}
+
+static int
+ocotp_attach(device_t dev)
+{
+	struct ocotp_softc *sc;
+	int err, rid;
+
+	sc = device_get_softc(dev);
+	sc->dev = dev;
+
+	/* Allocate bus_space resources. */
+	rid = 0;
+	sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+	    RF_ACTIVE);
+	if (sc->mem_res == NULL) {
+		device_printf(dev, "Cannot allocate memory resources\n");
+		err = ENXIO;
+		goto out;
+	}
+
+	ocotp_sc = sc;
+	err = 0;
+
+out:
+	if (err != 0)
+		ocotp_detach(dev);
+
+	return (err);
+}
+
+static int
+ocotp_probe(device_t dev)
+{
+
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+        if (ofw_bus_is_compatible(dev, "fsl,imx6q-ocotp") == 0)
+		return (ENXIO);
+
+	device_set_desc(dev, 
+	    "Freescale i.MX6 On-Chip One-Time-Programmable Memory");
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+uint32_t
+imx6_ocotp_read_4(bus_size_t off)
+{
+
+	if (ocotp_sc == NULL)
+		panic("imx6_ocotp_read_4: softc not set!");
+
+	if (off > IMX6_OCOTP_LAST_REG)
+		panic("imx6_ocotp_read_4: offset out of range");
+
+	return (RD4(ocotp_sc, off));
+}
+
+static device_method_t ocotp_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,  ocotp_probe),
+	DEVMETHOD(device_attach, ocotp_attach),
+	DEVMETHOD(device_detach, ocotp_detach),
+
+	DEVMETHOD_END
+};
+
+static driver_t ocotp_driver = {
+	"ocotp",
+	ocotp_methods,
+	sizeof(struct ocotp_softc)
+};
+
+static devclass_t ocotp_devclass;
+
+DRIVER_MODULE(ocotp, simplebus, ocotp_driver, ocotp_devclass, 0, 0);
+

sys/arm/freescale/imx/imx6_ocotpreg.h

@@ -0,0 +1,81 @@
+/*-
+ * Copyright (c) 2014 Steven Lawrance <stl@koffein.net>
+ * 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 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	IMX6_OCOTPREG_H
+#define	IMX6_OCOTPREG_H
+
+#define	IMX6_OCOTP_CTRL				0x000
+#define	IMX6_OCOTP_CTRL_SET			0x004
+#define	IMX6_OCOTP_CTRL_CLR			0x008
+#define	IMX6_OCOTP_CTRL_TOG			0x00C
+#define	IMX6_OCOTP_TIMING			0x010
+#define	IMX6_OCOTP_DATA				0x020
+#define	IMX6_OCOTP_READ_CTRL			0x030
+#define	IMX6_OCOTP_READ_FUSE_DATA		0x040
+#define	IMX6_OCOTP_SW_STICKY			0x050
+#define	IMX6_OCOTP_SCS				0x060
+#define	IMX6_OCOTP_SCS_SET			0x064
+#define	IMX6_OCOTP_SCS_CLR			0x068
+#define	IMX6_OCOTP_SCS_TOG			0x06C
+#define	IMX6_OCOTP_VERSION			0x090
+#define	IMX6_OCOTP_LOCK				0x400
+#define	IMX6_OCOTP_CFG0				0x410
+#define	IMX6_OCOTP_CFG1				0x420
+#define	IMX6_OCOTP_CFG2				0x430
+#define	IMX6_OCOTP_CFG3				0x440
+#define	IMX6_OCOTP_CFG4				0x450
+#define	IMX6_OCOTP_CFG5				0x460
+#define	IMX6_OCOTP_CFG6				0x470
+#define	IMX6_OCOTP_MEM0				0x480
+#define	IMX6_OCOTP_MEM1				0x490
+#define	IMX6_OCOTP_MEM2				0x4A0
+#define	IMX6_OCOTP_MEM3				0x4B0
+#define	IMX6_OCOTP_ANA0				0x4D0
+#define	IMX6_OCOTP_ANA1				0x4E0
+#define	IMX6_OCOTP_ANA2				0x4F0
+#define	IMX6_OCOTP_SRK0				0x580
+#define	IMX6_OCOTP_SRK1				0x590
+#define	IMX6_OCOTP_SRK2				0x5A0
+#define	IMX6_OCOTP_SRK3				0x5B0
+#define	IMX6_OCOTP_SRK4				0x5C0
+#define	IMX6_OCOTP_SRK5				0x5D0
+#define	IMX6_OCOTP_SRK6				0x5E0
+#define	IMX6_OCOTP_SRK7				0x5F0
+#define	IMX6_OCOTP_HSJC_RESP0			0x600
+#define	IMX6_OCOTP_HSJC_RESP1			0x610
+#define	IMX6_OCOTP_MAC0				0x620
+#define	IMX6_OCOTP_MAC1				0x630
+#define	IMX6_OCOTP_GP1				0x660
+#define	IMX6_OCOTP_GP2				0x670
+#define	IMX6_OCOTP_MISC_CONF			0x6D0
+#define	IMX6_OCOTP_FIELD_RETURN			0x6E0
+#define	IMX6_OCOTP_SRK_REVOKE			0x6F0
+
+#define	IMX6_OCOTP_LAST_REG			IMX6_OCOTP_SRK_REVOKE
+
+#endif

sys/arm/freescale/imx/imx6_ocotpvar.h

@@ -0,0 +1,34 @@
+/*-
+ * Copyright (c) 2014 Steven Lawrance <stl@koffein.net>
+ * 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 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	IMX6_OCOTPVAR_H
+#define	IMX6_OCOTPVAR_H
+
+uint32_t imx6_ocotp_read_4(bus_size_t _offset);
+
+#endif

sys/boot/fdt/dts/imx6.dtsi

@@ -337,6 +337,11 @@
 				bus-width = <0x4>;
 				status ="disabled";
 			};
+
+			ocotp0: ocotp@021bc000 {
+				compatible = "fsl,imx6q-ocotp";
+				reg = <0x021bc000 0x4000>;
+			}
 		};
 	};
 };