add35ed5b8
to check the status property in their probe routines. Simplebus used to only instantiate its children whose status="okay" but that was improper behavior, fixed in r261352. Now that it doesn't check anymore and probes all its children; the children all have to do the check because really only the children know how to properly interpret their status property strings. Right now all existing drivers only understand "okay" versus something- that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
192 lines
4.7 KiB
C
192 lines
4.7 KiB
C
/*-
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* Copyright (c) 2012, 2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Oleksandr Rybalko under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/ktr.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/cpuset.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/freescale/imx/imx51_tzicreg.h>
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struct tzic_softc {
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struct resource * tzic_res[3];
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bus_space_tag_t tzic_bst;
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bus_space_handle_t tzic_bsh;
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uint8_t ver;
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};
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static struct resource_spec tzic_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static struct tzic_softc *tzic_sc = NULL;
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#define tzic_read_4(reg) \
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bus_space_read_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg)
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#define tzic_write_4(reg, val) \
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bus_space_write_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg, val)
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static void tzic_post_filter(void *);
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static int
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tzic_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_is_compatible(dev, "fsl,tzic")) {
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device_set_desc(dev, "TrustZone Interrupt Controller");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static int
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tzic_attach(device_t dev)
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{
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struct tzic_softc *sc = device_get_softc(dev);
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int i;
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uint32_t reg;
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if (tzic_sc)
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return (ENXIO);
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if (bus_alloc_resources(dev, tzic_spec, sc->tzic_res)) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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arm_post_filter = tzic_post_filter;
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/* Distributor Interface */
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sc->tzic_bst = rman_get_bustag(sc->tzic_res[0]);
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sc->tzic_bsh = rman_get_bushandle(sc->tzic_res[0]);
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tzic_sc = sc;
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reg = tzic_read_4(TZIC_INTCNTL);
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tzic_write_4(TZIC_INTCNTL, INTCNTL_NSEN_MASK|INTCNTL_NSEN|INTCNTL_EN);
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reg = tzic_read_4(TZIC_INTCNTL);
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tzic_write_4(TZIC_PRIOMASK, 0x1f);
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reg = tzic_read_4(TZIC_PRIOMASK);
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tzic_write_4(TZIC_SYNCCTRL, 0x02);
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reg = tzic_read_4(TZIC_SYNCCTRL);
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/* route all interrupts to IRQ. secure interrupts are for FIQ */
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for (i = 0; i < 4; i++)
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tzic_write_4(TZIC_INTSEC(i), 0xffffffff);
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/* disable all interrupts */
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for (i = 0; i < 4; i++)
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tzic_write_4(TZIC_ENCLEAR(i), 0xffffffff);
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return (0);
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}
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static device_method_t tzic_methods[] = {
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DEVMETHOD(device_probe, tzic_probe),
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DEVMETHOD(device_attach, tzic_attach),
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{ 0, 0 }
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};
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static driver_t tzic_driver = {
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"tzic",
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tzic_methods,
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sizeof(struct tzic_softc),
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};
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static devclass_t tzic_devclass;
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/*
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* Memory space of controller located outside of device range, so let him to
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* attach not only to simplebus, but nexus also.
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*/
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EARLY_DRIVER_MODULE(tzic, nexus, tzic_driver, tzic_devclass, 0, 0,
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BUS_PASS_INTERRUPT);
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EARLY_DRIVER_MODULE(tzic, simplebus, tzic_driver, tzic_devclass, 0, 0,
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BUS_PASS_INTERRUPT);
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static void
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tzic_post_filter(void *arg)
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{
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}
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int
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arm_get_next_irq(int last_irq)
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{
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uint32_t pending;
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int i, b;
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for (i = 0; i < 4; i++) {
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pending = tzic_read_4(TZIC_PND(i));
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for (b = 0; pending != 0 && b < 32; b++)
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if (pending & (1 << b)) {
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return (i * 32 + b);
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}
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}
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return (-1);
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}
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void
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arm_mask_irq(uintptr_t nb)
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{
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tzic_write_4(TZIC_ENCLEAR(nb / 32), (1UL <<(nb % 32)));
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}
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void
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arm_unmask_irq(uintptr_t nb)
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{
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tzic_write_4(TZIC_ENSET(nb / 32), (1UL <<(nb % 32)));
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}
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