137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/*-
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* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* All rights reserved.
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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 <machine/bus.h>
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#include <machine/intr.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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#ifdef DEBUG
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#define dprintf(fmt, args...) printf(fmt, ##args)
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#else
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#define dprintf(fmt, args...)
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#endif
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#define SIC_STATUS 0x00
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#define SIC_RAWSTAT 0x04
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#define SIC_ENABLE 0x08
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#define SIC_ENSET 0x08
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#define SIC_ENCLR 0x0C
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#define SIC_SOFTINTSET 0x10
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#define SIC_SOFTINTCLR 0x14
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#define SIC_PICENABLE 0x20
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#define SIC_PICENSET 0x20
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#define SIC_PICENCLR 0x24
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struct versatile_sic_softc {
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device_t sc_dev;
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struct resource * mem_res;
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};
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#define sic_read_4(sc, reg) \
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bus_read_4(sc->mem_res, (reg))
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#define sic_write_4(sc, reg, val) \
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bus_write_4(sc->mem_res, (reg), (val))
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static int
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versatile_sic_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, "arm,versatile-sic"))
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return (ENXIO);
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device_set_desc(dev, "ARM Versatile SIC");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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versatile_sic_attach(device_t dev)
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{
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struct versatile_sic_softc *sc = device_get_softc(dev);
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uint32_t pass_irqs;
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int rid;
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sc->sc_dev = dev;
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/* Request memory resources */
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rid = 0;
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sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->mem_res == NULL) {
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device_printf(dev, "Error: could not allocate memory resources\n");
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return (ENXIO);
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}
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/* Disable all interrupts on SIC */
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sic_write_4(sc, SIC_ENCLR, 0xffffffff);
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/*
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* XXX: Enable IRQ3 for KMI
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* Should be replaced by proper interrupts cascading
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*/
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sic_write_4(sc, SIC_ENSET, (1 << 3));
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/*
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* Let PCI and Ethernet interrupts pass through
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* IRQ25, IRQ27..IRQ31
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*/
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pass_irqs = (0x1f << 27) | (1 << 25);
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sic_write_4(sc, SIC_PICENSET, pass_irqs);
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return (0);
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}
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static device_method_t versatile_sic_methods[] = {
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DEVMETHOD(device_probe, versatile_sic_probe),
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DEVMETHOD(device_attach, versatile_sic_attach),
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{ 0, 0 }
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};
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static driver_t versatile_sic_driver = {
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"sic",
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versatile_sic_methods,
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sizeof(struct versatile_sic_softc),
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};
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static devclass_t versatile_sic_devclass;
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DRIVER_MODULE(sic, simplebus, versatile_sic_driver, versatile_sic_devclass, 0, 0);
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