diff options
Diffstat (limited to 'sys/arm/allwinner/aw_r_intc.c')
| -rw-r--r-- | sys/arm/allwinner/aw_r_intc.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/sys/arm/allwinner/aw_r_intc.c b/sys/arm/allwinner/aw_r_intc.c new file mode 100644 index 000000000000..6d9369e12dca --- /dev/null +++ b/sys/arm/allwinner/aw_r_intc.c @@ -0,0 +1,299 @@ +/*- + * Copyright (c) 2021 Emmanuel Vadot <manu@freebsd.org> + * + * 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 "opt_platform.h" + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <machine/intr.h> + +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include "pic_if.h" + +struct aw_r_intc_gicp_softc { + device_t dev; + device_t parent; + struct resource *res; + + struct intr_map_data_fdt *parent_map_data; +}; + +static struct ofw_compat_data compat_data[] = { + {"allwinner,sun6i-a31-r-intc", 1}, + {NULL, 0} +}; + +static int +aw_r_intc_gicp_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "Allwinner R INTC"); + return (BUS_PROBE_DEFAULT); +} + +static int +aw_r_intc_gicp_attach(device_t dev) +{ + struct aw_r_intc_gicp_softc *sc; + phandle_t node, xref, intr_parent; + + sc = device_get_softc(dev); + sc->dev = dev; + node = ofw_bus_get_node(dev); + + /* Look for our parent */ + if ((intr_parent = ofw_bus_find_iparent(node)) == 0) { + device_printf(dev, + "Cannot find our parent interrupt controller\n"); + return (ENXIO); + } + if ((sc->parent = OF_device_from_xref(intr_parent)) == NULL) { + device_printf(dev, + "cannot find parent interrupt controller device\n"); + return (ENXIO); + } + + /* Register ourself as a interrupt controller */ + xref = OF_xref_from_node(node); + if (intr_pic_register(dev, xref) == NULL) { + device_printf(dev, "Cannot register GICP\n"); + return (ENXIO); + } + + /* Allocate GIC compatible mapping */ + sc->parent_map_data = (struct intr_map_data_fdt *)intr_alloc_map_data( + INTR_MAP_DATA_FDT, sizeof(struct intr_map_data_fdt) + + + 3 * sizeof(phandle_t), M_WAITOK | M_ZERO); + + /* Register ourself to device can find us */ + OF_device_register_xref(xref, dev); + + return (0); +} + +static int +aw_r_intc_gicp_detach(device_t dev) +{ + + return (EBUSY); +} + +static struct intr_map_data * +aw_r_intc_gicp_convert_map_data(struct aw_r_intc_gicp_softc *sc, + struct intr_map_data *data) +{ + struct intr_map_data_fdt *daf; + + daf = (struct intr_map_data_fdt *)data; + + /* We only support GIC forward for now */ + if (daf->ncells != 3) + return (NULL); + + /* Check if this is a GIC_SPI type */ + if (daf->cells[0] != 0) + return (NULL); + + sc->parent_map_data->ncells = 3; + sc->parent_map_data->cells[0] = 0; + sc->parent_map_data->cells[1] = daf->cells[1]; + sc->parent_map_data->cells[2] = daf->cells[2]; + + return ((struct intr_map_data *)sc->parent_map_data); +} + +static int +aw_r_intc_gicp_activate_intr(device_t dev, struct intr_irqsrc *isrc, + struct resource *res, struct intr_map_data *data) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + data = aw_r_intc_gicp_convert_map_data(sc, data); + if (data == NULL) + return (EINVAL); + + return (PIC_ACTIVATE_INTR(sc->parent, isrc, res, data)); +} + +static void +aw_r_intc_gicp_enable_intr(device_t dev, struct intr_irqsrc *isrc) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + + PIC_ENABLE_INTR(sc->parent, isrc); +} + +static void +aw_r_intc_gicp_disable_intr(device_t dev, struct intr_irqsrc *isrc) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + + PIC_DISABLE_INTR(sc->parent, isrc); +} + +static int +aw_r_intc_gicp_map_intr(device_t dev, struct intr_map_data *data, + struct intr_irqsrc **isrcp) +{ + struct aw_r_intc_gicp_softc *sc; + int ret; + + sc = device_get_softc(dev); + + if (data->type != INTR_MAP_DATA_FDT) + return (ENOTSUP); + + data = aw_r_intc_gicp_convert_map_data(sc, data); + if (data == NULL) + return (EINVAL); + + ret = PIC_MAP_INTR(sc->parent, data, isrcp); + (*isrcp)->isrc_dev = sc->dev; + return(ret); +} + +static int +aw_r_intc_gicp_deactivate_intr(device_t dev, struct intr_irqsrc *isrc, + struct resource *res, struct intr_map_data *data) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + + data = aw_r_intc_gicp_convert_map_data(sc, data); + if (data == NULL) + return (EINVAL); + + return (PIC_DEACTIVATE_INTR(sc->parent, isrc, res, data)); +} + +static int +aw_r_intc_gicp_setup_intr(device_t dev, struct intr_irqsrc *isrc, + struct resource *res, struct intr_map_data *data) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + data = aw_r_intc_gicp_convert_map_data(sc, data); + if (data == NULL) + return (EINVAL); + + return (PIC_SETUP_INTR(sc->parent, isrc, res, data)); +} + +static int +aw_r_intc_gicp_teardown_intr(device_t dev, struct intr_irqsrc *isrc, + struct resource *res, struct intr_map_data *data) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + data = aw_r_intc_gicp_convert_map_data(sc, data); + if (data == NULL) + return (EINVAL); + + return (PIC_TEARDOWN_INTR(sc->parent, isrc, res, data)); +} + +static void +aw_r_intc_gicp_pre_ithread(device_t dev, struct intr_irqsrc *isrc) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + + PIC_PRE_ITHREAD(sc->parent, isrc); +} + +static void +aw_r_intc_gicp_post_ithread(device_t dev, struct intr_irqsrc *isrc) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + + PIC_POST_ITHREAD(sc->parent, isrc); +} + +static void +aw_r_intc_gicp_post_filter(device_t dev, struct intr_irqsrc *isrc) +{ + struct aw_r_intc_gicp_softc *sc; + + sc = device_get_softc(dev); + + PIC_POST_FILTER(sc->parent, isrc); +} + +static device_method_t aw_r_intc_gicp_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, aw_r_intc_gicp_probe), + DEVMETHOD(device_attach, aw_r_intc_gicp_attach), + DEVMETHOD(device_detach, aw_r_intc_gicp_detach), + + /* Interrupt controller interface */ + DEVMETHOD(pic_activate_intr, aw_r_intc_gicp_activate_intr), + DEVMETHOD(pic_disable_intr, aw_r_intc_gicp_disable_intr), + DEVMETHOD(pic_enable_intr, aw_r_intc_gicp_enable_intr), + DEVMETHOD(pic_map_intr, aw_r_intc_gicp_map_intr), + DEVMETHOD(pic_deactivate_intr, aw_r_intc_gicp_deactivate_intr), + DEVMETHOD(pic_setup_intr, aw_r_intc_gicp_setup_intr), + DEVMETHOD(pic_teardown_intr, aw_r_intc_gicp_teardown_intr), + DEVMETHOD(pic_post_filter, aw_r_intc_gicp_post_filter), + DEVMETHOD(pic_post_ithread, aw_r_intc_gicp_post_ithread), + DEVMETHOD(pic_pre_ithread, aw_r_intc_gicp_pre_ithread), + + DEVMETHOD_END +}; + +static devclass_t aw_r_intc_gicp_devclass; + +static driver_t aw_r_intc_gicp_driver = { + "aw_r_intc_gicp", + aw_r_intc_gicp_methods, + sizeof(struct aw_r_intc_gicp_softc), +}; + +EARLY_DRIVER_MODULE(aw_r_intc_gicp, simplebus, aw_r_intc_gicp_driver, + aw_r_intc_gicp_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); |