Author: gonzo
Date: Thu Dec 13 23:03:37 2012
New Revision: 244195
URL: http://svnweb.freebsd.org/changeset/base/244195
Log:
Add driver for PrimeCell Vectored Interrupt Controller (PL190)
Added:
head/sys/arm/arm/pl190.c (contents, props changed)
Modified:
head/sys/conf/files.arm
Added: head/sys/arm/arm/pl190.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/arm/pl190.c Thu Dec 13 23:03:37 2012 (r244195)
@@ -0,0 +1,187 @@
+/*-
+ * Copyright (c) 2012 Oleksandr Tymoshenko <go...@bluezbox.com>
+ * 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("$FreeBSD$");
+
+#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 <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>
+
+#ifdef DEBUG
+#define dprintf(fmt, args...) printf(fmt, ##args)
+#else
+#define dprintf(fmt, args...)
+#endif
+
+#define VICIRQSTATUS 0x000
+#define VICFIQSTATUS 0x004
+#define VICRAWINTR 0x008
+#define VICINTSELECT 0x00C
+#define VICINTENABLE 0x010
+#define VICINTENCLEAR 0x014
+#define VICSOFTINT 0x018
+#define VICSOFTINTCLEAR 0x01C
+#define VICPROTECTION 0x020
+#define VICPERIPHID 0xFE0
+#define VICPRIMECELLID 0xFF0
+
+#define VIC_NIRQS 32
+
+struct pl190_intc_softc {
+ device_t sc_dev;
+ struct resource * intc_res;
+};
+
+static struct pl190_intc_softc *pl190_intc_sc = NULL;
+
+#define intc_vic_read_4(reg) \
+ bus_read_4(pl190_intc_sc->intc_res, (reg))
+#define intc_vic_write_4(reg, val) \
+ bus_write_4(pl190_intc_sc->intc_res, (reg), (val))
+
+static int
+pl190_intc_probe(device_t dev)
+{
+ if (!ofw_bus_is_compatible(dev, "arm,versatile-vic"))
+ return (ENXIO);
+ device_set_desc(dev, "ARM PL190 VIC");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+pl190_intc_attach(device_t dev)
+{
+ struct pl190_intc_softc *sc = device_get_softc(dev);
+ uint32_t id;
+ int i, rid;
+
+ sc->sc_dev = dev;
+
+ if (pl190_intc_sc)
+ return (ENXIO);
+
+ /* Request memory resources */
+ rid = 0;
+ sc->intc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+ RF_ACTIVE);
+ if (sc->intc_res == NULL) {
+ device_printf(dev, "Error: could not allocate memory
resources\n");
+ return (ENXIO);
+ }
+
+ pl190_intc_sc = sc;
+ /*
+ * All interrupts should use IRQ line
+ */
+ intc_vic_write_4(VICINTSELECT, 0x00000000);
+ /* Disable all interrupts */
+ intc_vic_write_4(VICINTENCLEAR, 0xffffffff);
+ /* Enable INT31, SIC IRQ */
+ intc_vic_write_4(VICINTENABLE, (1 << 31));
+
+ id = 0;
+ for (i = 3; i >= 0; i--) {
+ id = (id << 8) |
+ (intc_vic_read_4(VICPERIPHID + i*4) & 0xff);
+ }
+
+ device_printf(dev, "Peripheral ID: %08x\n", id);
+
+ id = 0;
+ for (i = 3; i >= 0; i--) {
+ id = (id << 8) |
+ (intc_vic_read_4(VICPRIMECELLID + i*4) & 0xff);
+ }
+
+ device_printf(dev, "PrimeCell ID: %08x\n", id);
+
+ return (0);
+}
+
+static device_method_t pl190_intc_methods[] = {
+ DEVMETHOD(device_probe, pl190_intc_probe),
+ DEVMETHOD(device_attach, pl190_intc_attach),
+ { 0, 0 }
+};
+
+static driver_t pl190_intc_driver = {
+ "intc",
+ pl190_intc_methods,
+ sizeof(struct pl190_intc_softc),
+};
+
+static devclass_t pl190_intc_devclass;
+
+DRIVER_MODULE(intc, simplebus, pl190_intc_driver, pl190_intc_devclass, 0, 0);
+
+int
+arm_get_next_irq(int last_irq)
+{
+ uint32_t pending;
+ int32_t irq = last_irq + 1;
+
+ /* Sanity check */
+ if (irq < 0)
+ irq = 0;
+
+ pending = intc_vic_read_4(VICIRQSTATUS);
+ while (irq < VIC_NIRQS) {
+ if (pending & (1 << irq))
+ return (irq);
+ irq++;
+ }
+
+ return (-1);
+}
+
+void
+arm_mask_irq(uintptr_t nb)
+{
+
+ dprintf("%s: %d\n", __func__, nb);
+ intc_vic_write_4(VICINTENCLEAR, (1 << nb));
+}
+
+void
+arm_unmask_irq(uintptr_t nb)
+{
+
+ dprintf("%s: %d\n", __func__, nb);
+ intc_vic_write_4(VICINTENABLE, (1 << nb));
+}
Modified: head/sys/conf/files.arm
==============================================================================
--- head/sys/conf/files.arm Thu Dec 13 22:03:07 2012 (r244194)
+++ head/sys/conf/files.arm Thu Dec 13 23:03:37 2012 (r244195)
@@ -32,6 +32,7 @@ arm/arm/mem.c optional mem
arm/arm/minidump_machdep.c optional mem
arm/arm/mp_machdep.c optional smp
arm/arm/nexus.c standard
+arm/arm/pl190.c optional pl190
arm/arm/pl310.c optional pl310
arm/arm/pmap.c optional cpu_arm9 | cpu_arm9e |
cpu_fa526 | cpu_sa1100 | cpu_sa1110 | cpu_xscale_80219 | cpu_xscale_80321 |
cpu_xscale_81342 | cpu_xscale_ixp425 | cpu_xscale_ixp435 | cpu_xscale_pxa2x0
arm/arm/pmap-v6.c optional cpu_arm11 | cpu_cortexa |
cpu_mv_pj4b
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