svn commit: r242760 - projects/efika_mx/sys/arm/freescale/imx

[Aleksandr Rybalko]

Author: ray
Date: Thu Nov  8 12:48:13 2012
New Revision: 242760
URL: http://svnweb.freebsd.org/changeset/base/242760

Log:
  Trust Zone Interrupt Controller (TZIC) driver.

Added:
  projects/efika_mx/sys/arm/freescale/imx/tzic.c

Added: projects/efika_mx/sys/arm/freescale/imx/tzic.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ projects/efika_mx/sys/arm/freescale/imx/tzic.c	Thu Nov  8 12:48:13 2012	(r242760)
@@ -0,0 +1,184 @@
+/*-
+ * Copyright (c) 2012 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Oleksandr Rybalko under sponsorship
+ * from the FreeBSD Foundation.
+ * 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("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/ktr.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/pcpu.h>
+#include <sys/proc.h>
+#include <sys/cpuset.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <machine/bus.h>
+#include <machine/intr.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <arm/freescale/imx/imx51_tzicreg.h>
+
+struct tzic_softc {
+	struct resource *	tzic_res[3];
+	bus_space_tag_t		tzic_bst;
+	bus_space_handle_t	tzic_bsh;
+	uint8_t			ver;
+};
+
+static struct resource_spec tzic_spec[] = {
+	{ SYS_RES_MEMORY,	0,	RF_ACTIVE },
+	{ -1, 0 }
+};
+
+static struct tzic_softc *tzic_sc = NULL;
+
+#define	tzic_read_4(reg)		\
+    bus_space_read_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg)
+#define	tzic_write_4(reg, val)		\
+    bus_space_write_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg, val)
+
+static void tzic_post_filter(void *);
+
+static int
+tzic_probe(device_t dev)
+{
+	if (ofw_bus_is_compatible(dev, "fsl,tzic")) {
+		device_set_desc(dev, "TrustZone Interrupt Controller");
+		return (BUS_PROBE_DEFAULT);
+	}
+	return (ENXIO);
+}
+
+static int
+tzic_attach(device_t dev)
+{
+	struct		tzic_softc *sc = device_get_softc(dev);
+	int		i;
+	uint32_t	reg;
+
+	if (tzic_sc)
+		return (ENXIO);
+
+	if (bus_alloc_resources(dev, tzic_spec, sc->tzic_res)) {
+		device_printf(dev, "could not allocate resources\n");
+		return (ENXIO);
+	}
+
+	arm_post_filter = tzic_post_filter;
+
+	/* Distributor Interface */
+	sc->tzic_bst = rman_get_bustag(sc->tzic_res[0]);
+	sc->tzic_bsh = rman_get_bushandle(sc->tzic_res[0]);
+
+	tzic_sc = sc;
+
+	reg = tzic_read_4(TZIC_INTCNTL);
+	tzic_write_4(TZIC_INTCNTL, INTCNTL_NSEN_MASK|INTCNTL_NSEN|INTCNTL_EN);
+	reg = tzic_read_4(TZIC_INTCNTL);
+	tzic_write_4(TZIC_PRIOMASK, 0x1f);
+	reg = tzic_read_4(TZIC_PRIOMASK);
+
+	tzic_write_4(TZIC_SYNCCTRL, 0x02);
+	reg = tzic_read_4(TZIC_SYNCCTRL);
+
+	/* route all interrupts to IRQ.  secure interrupts are for FIQ */
+	for (i = 0; i < 4; i++)
+		tzic_write_4(TZIC_INTSEC(i), 0xffffffff);
+
+	/* disable all interrupts */
+	for (i = 0; i < 4; i++)
+		tzic_write_4(TZIC_ENCLEAR(i), 0xffffffff);
+
+	return (0);
+}
+
+static device_method_t tzic_methods[] = {
+	DEVMETHOD(device_probe,		tzic_probe),
+	DEVMETHOD(device_attach,	tzic_attach),
+	{ 0, 0 }
+};
+
+static driver_t tzic_driver = {
+	"tzic",
+	tzic_methods,
+	sizeof(struct tzic_softc),
+};
+
+static devclass_t tzic_devclass;
+
+/*
+ * Memory space of controller located outside of device range, so let him to
+ * attach not only to simplebus, but fdtbus also.
+ */
+DRIVER_MODULE(tzic, fdtbus, tzic_driver, tzic_devclass, 0, 0);
+DRIVER_MODULE(tzic, simplebus, tzic_driver, tzic_devclass, 0, 0);
+
+static void
+tzic_post_filter(void *arg)
+{
+
+}
+
+int
+arm_get_next_irq(int last_irq)
+{
+	uint32_t pending;
+	int i, b;
+
+	for (i = 0; i < 4; i++) {
+		pending = tzic_read_4(TZIC_PND(i));
+		for (b = 0; b < 32; b++)
+			if (pending & (1 << b)) {
+				return (i * 32 + b);
+			}
+	}
+
+	return (-1);
+}
+
+void
+arm_mask_irq(uintptr_t nb)
+{
+
+	tzic_write_4(TZIC_ENCLEAR(nb / 32), (1UL <<(nb % 32)));
+}
+
+void
+arm_unmask_irq(uintptr_t nb)
+{
+
+	tzic_write_4(TZIC_ENSET(nb / 32), (1UL <<(nb % 32)));
+}