298 lines
7.6 KiB
C
298 lines
7.6 KiB
C
/*-
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* Copyright (c) 2021 Emmanuel Vadot <manu@freebsd.org>
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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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#include "opt_platform.h"
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#include <sys/param.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 <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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#include "pic_if.h"
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struct aw_r_intc_gicp_softc {
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device_t dev;
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device_t parent;
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struct resource *res;
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struct intr_map_data_fdt *parent_map_data;
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};
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static struct ofw_compat_data compat_data[] = {
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{"allwinner,sun6i-a31-r-intc", 1},
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{"allwinner,sun6i-a64-r-intc", 1},
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{"allwinner,sun50i-h6-r-intc", 1},
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{NULL, 0}
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};
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static int
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aw_r_intc_gicp_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_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "Allwinner R INTC");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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aw_r_intc_gicp_attach(device_t dev)
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{
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struct aw_r_intc_gicp_softc *sc;
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phandle_t node, xref, intr_parent;
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sc = device_get_softc(dev);
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sc->dev = dev;
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node = ofw_bus_get_node(dev);
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/* Look for our parent */
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if ((intr_parent = ofw_bus_find_iparent(node)) == 0) {
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device_printf(dev,
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"Cannot find our parent interrupt controller\n");
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return (ENXIO);
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}
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if ((sc->parent = OF_device_from_xref(intr_parent)) == NULL) {
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device_printf(dev,
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"cannot find parent interrupt controller device\n");
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return (ENXIO);
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}
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/* Register ourself as a interrupt controller */
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xref = OF_xref_from_node(node);
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if (intr_pic_register(dev, xref) == NULL) {
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device_printf(dev, "Cannot register GICP\n");
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return (ENXIO);
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}
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/* Allocate GIC compatible mapping */
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sc->parent_map_data = (struct intr_map_data_fdt *)intr_alloc_map_data(
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INTR_MAP_DATA_FDT, sizeof(struct intr_map_data_fdt) +
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+ 3 * sizeof(phandle_t), M_WAITOK | M_ZERO);
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/* Register ourself to device can find us */
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OF_device_register_xref(xref, dev);
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return (0);
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}
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static int
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aw_r_intc_gicp_detach(device_t dev)
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{
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return (EBUSY);
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}
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static struct intr_map_data *
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aw_r_intc_gicp_convert_map_data(struct aw_r_intc_gicp_softc *sc,
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struct intr_map_data *data)
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{
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struct intr_map_data_fdt *daf;
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daf = (struct intr_map_data_fdt *)data;
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/* We only support GIC forward for now */
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if (daf->ncells != 3)
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return (NULL);
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/* Check if this is a GIC_SPI type */
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if (daf->cells[0] != 0)
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return (NULL);
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sc->parent_map_data->ncells = 3;
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sc->parent_map_data->cells[0] = 0;
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sc->parent_map_data->cells[1] = daf->cells[1];
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sc->parent_map_data->cells[2] = daf->cells[2];
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return ((struct intr_map_data *)sc->parent_map_data);
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}
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static int
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aw_r_intc_gicp_activate_intr(device_t dev, struct intr_irqsrc *isrc,
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struct resource *res, struct intr_map_data *data)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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data = aw_r_intc_gicp_convert_map_data(sc, data);
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if (data == NULL)
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return (EINVAL);
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return (PIC_ACTIVATE_INTR(sc->parent, isrc, res, data));
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}
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static void
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aw_r_intc_gicp_enable_intr(device_t dev, struct intr_irqsrc *isrc)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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PIC_ENABLE_INTR(sc->parent, isrc);
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}
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static void
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aw_r_intc_gicp_disable_intr(device_t dev, struct intr_irqsrc *isrc)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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PIC_DISABLE_INTR(sc->parent, isrc);
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}
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static int
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aw_r_intc_gicp_map_intr(device_t dev, struct intr_map_data *data,
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struct intr_irqsrc **isrcp)
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{
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struct aw_r_intc_gicp_softc *sc;
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int ret;
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sc = device_get_softc(dev);
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if (data->type != INTR_MAP_DATA_FDT)
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return (ENOTSUP);
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data = aw_r_intc_gicp_convert_map_data(sc, data);
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if (data == NULL)
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return (EINVAL);
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ret = PIC_MAP_INTR(sc->parent, data, isrcp);
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(*isrcp)->isrc_dev = sc->dev;
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return(ret);
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}
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static int
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aw_r_intc_gicp_deactivate_intr(device_t dev, struct intr_irqsrc *isrc,
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struct resource *res, struct intr_map_data *data)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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data = aw_r_intc_gicp_convert_map_data(sc, data);
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if (data == NULL)
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return (EINVAL);
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return (PIC_DEACTIVATE_INTR(sc->parent, isrc, res, data));
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}
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static int
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aw_r_intc_gicp_setup_intr(device_t dev, struct intr_irqsrc *isrc,
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struct resource *res, struct intr_map_data *data)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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data = aw_r_intc_gicp_convert_map_data(sc, data);
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if (data == NULL)
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return (EINVAL);
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return (PIC_SETUP_INTR(sc->parent, isrc, res, data));
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}
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static int
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aw_r_intc_gicp_teardown_intr(device_t dev, struct intr_irqsrc *isrc,
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struct resource *res, struct intr_map_data *data)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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data = aw_r_intc_gicp_convert_map_data(sc, data);
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if (data == NULL)
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return (EINVAL);
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return (PIC_TEARDOWN_INTR(sc->parent, isrc, res, data));
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}
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static void
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aw_r_intc_gicp_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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PIC_PRE_ITHREAD(sc->parent, isrc);
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}
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static void
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aw_r_intc_gicp_post_ithread(device_t dev, struct intr_irqsrc *isrc)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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PIC_POST_ITHREAD(sc->parent, isrc);
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}
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static void
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aw_r_intc_gicp_post_filter(device_t dev, struct intr_irqsrc *isrc)
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{
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struct aw_r_intc_gicp_softc *sc;
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sc = device_get_softc(dev);
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PIC_POST_FILTER(sc->parent, isrc);
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}
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static device_method_t aw_r_intc_gicp_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, aw_r_intc_gicp_probe),
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DEVMETHOD(device_attach, aw_r_intc_gicp_attach),
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DEVMETHOD(device_detach, aw_r_intc_gicp_detach),
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/* Interrupt controller interface */
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DEVMETHOD(pic_activate_intr, aw_r_intc_gicp_activate_intr),
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DEVMETHOD(pic_disable_intr, aw_r_intc_gicp_disable_intr),
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DEVMETHOD(pic_enable_intr, aw_r_intc_gicp_enable_intr),
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DEVMETHOD(pic_map_intr, aw_r_intc_gicp_map_intr),
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DEVMETHOD(pic_deactivate_intr, aw_r_intc_gicp_deactivate_intr),
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DEVMETHOD(pic_setup_intr, aw_r_intc_gicp_setup_intr),
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DEVMETHOD(pic_teardown_intr, aw_r_intc_gicp_teardown_intr),
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DEVMETHOD(pic_post_filter, aw_r_intc_gicp_post_filter),
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DEVMETHOD(pic_post_ithread, aw_r_intc_gicp_post_ithread),
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DEVMETHOD(pic_pre_ithread, aw_r_intc_gicp_pre_ithread),
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DEVMETHOD_END
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};
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static driver_t aw_r_intc_gicp_driver = {
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"aw_r_intc_gicp",
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aw_r_intc_gicp_methods,
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sizeof(struct aw_r_intc_gicp_softc),
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};
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EARLY_DRIVER_MODULE(aw_r_intc_gicp, simplebus, aw_r_intc_gicp_driver, 0, 0,
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BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
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