214 lines
5.1 KiB
C
214 lines
5.1 KiB
C
/*-
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* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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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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/*
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* Altera PIO (Parallel IO) device driver
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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/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/timeet.h>
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#include <sys/timetc.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 <machine/bus.h>
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#include <machine/fdt.h>
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#include <machine/cpu.h>
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#include <dev/altera/pio/pio.h>
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#include "pio_if.h"
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#define READ4(_sc, _reg) bus_read_4((_sc)->res[0], _reg)
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#define READ2(_sc, _reg) bus_read_2((_sc)->res[0], _reg)
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#define READ1(_sc, _reg) bus_read_1((_sc)->res[0], _reg)
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#define WRITE4(_sc, _reg, _val) bus_write_4((_sc)->res[0], _reg, _val)
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#define WRITE2(_sc, _reg, _val) bus_write_2((_sc)->res[0], _reg, _val)
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#define WRITE1(_sc, _reg, _val) bus_write_1((_sc)->res[0], _reg, _val)
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struct pio_softc {
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struct resource *res[2];
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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device_t dev;
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void *ih;
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};
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static struct resource_spec pio_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ SYS_RES_IRQ, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static int
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pio_setup_irq(device_t dev, void *intr_handler, void *ih_user)
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{
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struct pio_softc *sc;
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sc = device_get_softc(dev);
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/* Setup interrupt handlers */
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if (bus_setup_intr(sc->dev, sc->res[1], INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, intr_handler, ih_user, &sc->ih)) {
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device_printf(sc->dev, "Unable to setup intr\n");
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return (1);
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}
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return (0);
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}
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static int
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pio_teardown_irq(device_t dev)
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{
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struct pio_softc *sc;
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sc = device_get_softc(dev);
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bus_teardown_intr(sc->dev, sc->res[1], sc->ih);
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return (0);
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}
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static int
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pio_read(device_t dev)
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{
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struct pio_softc *sc;
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sc = device_get_softc(dev);
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return (READ4(sc, PIO_DATA));
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}
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static int
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pio_set(device_t dev, int bit, int enable)
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{
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struct pio_softc *sc;
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sc = device_get_softc(dev);
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if (enable)
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WRITE4(sc, PIO_OUTSET, bit);
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else
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WRITE4(sc, PIO_OUTCLR, bit);
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return (0);
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}
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static int
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pio_configure(device_t dev, int dir, int mask)
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{
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struct pio_softc *sc;
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sc = device_get_softc(dev);
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WRITE4(sc, PIO_INT_MASK, mask);
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WRITE4(sc, PIO_DIR, dir);
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return (0);
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}
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static int
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pio_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, "altr,pio"))
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return (ENXIO);
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device_set_desc(dev, "Altera PIO");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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pio_attach(device_t dev)
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{
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struct pio_softc *sc;
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struct fdt_ic *fic;
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phandle_t node;
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sc = device_get_softc(dev);
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sc->dev = dev;
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if (bus_alloc_resources(dev, pio_spec, sc->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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/* Memory interface */
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sc->bst = rman_get_bustag(sc->res[0]);
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sc->bsh = rman_get_bushandle(sc->res[0]);
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if ((node = ofw_bus_get_node(sc->dev)) == -1)
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return (ENXIO);
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fic = malloc(sizeof(*fic), M_DEVBUF, M_WAITOK|M_ZERO);
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fic->iph = node;
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fic->dev = dev;
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SLIST_INSERT_HEAD(&fdt_ic_list_head, fic, fdt_ics);
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return (0);
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}
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static device_method_t pio_methods[] = {
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DEVMETHOD(device_probe, pio_probe),
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DEVMETHOD(device_attach, pio_attach),
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/* pio_if.m */
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DEVMETHOD(pio_read, pio_read),
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DEVMETHOD(pio_configure, pio_configure),
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DEVMETHOD(pio_set, pio_set),
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DEVMETHOD(pio_setup_irq, pio_setup_irq),
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DEVMETHOD(pio_teardown_irq, pio_teardown_irq),
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DEVMETHOD_END
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};
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static driver_t pio_driver = {
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"altera_pio",
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pio_methods,
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sizeof(struct pio_softc),
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};
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static devclass_t pio_devclass;
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DRIVER_MODULE(altera_pio, simplebus, pio_driver, pio_devclass, 0, 0);
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