af3dc4a7ca
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
323 lines
8.0 KiB
C
323 lines
8.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012-2017 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/proc.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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#include "pic_if.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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#define SIC_NIRQS 32
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struct versatile_sic_irqsrc {
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struct intr_irqsrc isrc;
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u_int irq;
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};
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struct versatile_sic_softc {
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device_t dev;
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struct mtx mtx;
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struct resource * mem_res;
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struct resource * irq_res;
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void *intrh;
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struct versatile_sic_irqsrc isrcs[SIC_NIRQS];
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};
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#define SIC_LOCK(_sc) mtx_lock_spin(&(_sc)->mtx)
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#define SIC_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->mtx)
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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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/*
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* Driver stuff
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*/
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static int versatile_sic_probe(device_t);
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static int versatile_sic_attach(device_t);
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static int versatile_sic_detach(device_t);
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static void
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versatile_sic_disable_intr(device_t dev, struct intr_irqsrc *isrc)
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{
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struct versatile_sic_softc *sc;
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struct versatile_sic_irqsrc *src;
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sc = device_get_softc(dev);
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src = (struct versatile_sic_irqsrc *)isrc;
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SIC_LOCK(sc);
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SIC_WRITE_4(sc, SIC_ENCLR, (1 << src->irq));
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SIC_UNLOCK(sc);
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}
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static void
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versatile_sic_enable_intr(device_t dev, struct intr_irqsrc *isrc)
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{
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struct versatile_sic_softc *sc;
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struct versatile_sic_irqsrc *src;
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sc = device_get_softc(dev);
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src = (struct versatile_sic_irqsrc *)isrc;
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SIC_LOCK(sc);
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SIC_WRITE_4(sc, SIC_ENSET, (1 << src->irq));
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SIC_UNLOCK(sc);
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}
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static int
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versatile_sic_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 intr_map_data_fdt *daf;
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struct versatile_sic_softc *sc;
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if (data->type != INTR_MAP_DATA_FDT)
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return (ENOTSUP);
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daf = (struct intr_map_data_fdt *)data;
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if (daf->ncells != 1 || daf->cells[0] >= SIC_NIRQS)
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return (EINVAL);
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sc = device_get_softc(dev);
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*isrcp = &sc->isrcs[daf->cells[0]].isrc;
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return (0);
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}
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static void
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versatile_sic_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
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{
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versatile_sic_disable_intr(dev, isrc);
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}
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static void
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versatile_sic_post_ithread(device_t dev, struct intr_irqsrc *isrc)
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{
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struct versatile_sic_irqsrc *src;
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src = (struct versatile_sic_irqsrc *)isrc;
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arm_irq_memory_barrier(src->irq);
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versatile_sic_enable_intr(dev, isrc);
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}
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static void
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versatile_sic_post_filter(device_t dev, struct intr_irqsrc *isrc)
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{
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struct versatile_sic_irqsrc *src;
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src = (struct versatile_sic_irqsrc *)isrc;
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arm_irq_memory_barrier(src->irq);
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}
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static int
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versatile_sic_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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return (0);
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}
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static int
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versatile_sic_filter(void *arg)
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{
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struct versatile_sic_softc *sc;
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struct intr_irqsrc *isrc;
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uint32_t i, interrupts;
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sc = arg;
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SIC_LOCK(sc);
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interrupts = SIC_READ_4(sc, SIC_STATUS);
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SIC_UNLOCK(sc);
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for (i = 0; interrupts != 0; i++, interrupts >>= 1) {
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if ((interrupts & 0x1) == 0)
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continue;
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isrc = &sc->isrcs[i].isrc;
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if (intr_isrc_dispatch(isrc, curthread->td_intr_frame) != 0) {
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versatile_sic_disable_intr(sc->dev, isrc);
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versatile_sic_post_filter(sc->dev, isrc);
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device_printf(sc->dev, "Stray irq %u disabled\n", i);
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}
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}
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return (FILTER_HANDLED);
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}
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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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int rid, error;
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uint32_t irq;
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const char *name;
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struct versatile_sic_irqsrc *isrcs;
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sc->dev = dev;
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mtx_init(&sc->mtx, device_get_nameunit(dev), "sic",
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MTX_SPIN);
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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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/* Request memory resources */
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rid = 0;
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sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_ACTIVE);
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if (sc->irq_res == NULL) {
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device_printf(dev, "could not allocate IRQ resources\n");
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versatile_sic_detach(dev);
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return (ENXIO);
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}
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if ((bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC,
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versatile_sic_filter, NULL, sc, &sc->intrh))) {
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device_printf(dev,
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"unable to register interrupt handler\n");
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versatile_sic_detach(dev);
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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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/* PIC attachment */
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isrcs = sc->isrcs;
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name = device_get_nameunit(sc->dev);
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for (irq = 0; irq < SIC_NIRQS; irq++) {
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isrcs[irq].irq = irq;
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error = intr_isrc_register(&isrcs[irq].isrc, sc->dev,
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0, "%s,%u", name, irq);
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if (error != 0)
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return (error);
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}
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intr_pic_register(dev, OF_xref_from_node(ofw_bus_get_node(dev)));
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return (0);
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}
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static int
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versatile_sic_detach(device_t dev)
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{
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struct versatile_sic_softc *sc;
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sc = device_get_softc(dev);
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if (sc->intrh)
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bus_teardown_intr(dev, sc->irq_res, sc->intrh);
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if (sc->mem_res == NULL)
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bus_release_resource(dev, SYS_RES_MEMORY,
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rman_get_rid(sc->mem_res), sc->mem_res);
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if (sc->irq_res == NULL)
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bus_release_resource(dev, SYS_RES_IRQ,
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rman_get_rid(sc->irq_res), sc->irq_res);
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mtx_destroy(&sc->mtx);
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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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DEVMETHOD(device_detach, versatile_sic_detach),
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DEVMETHOD(pic_disable_intr, versatile_sic_disable_intr),
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DEVMETHOD(pic_enable_intr, versatile_sic_enable_intr),
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DEVMETHOD(pic_map_intr, versatile_sic_map_intr),
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DEVMETHOD(pic_post_filter, versatile_sic_post_filter),
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DEVMETHOD(pic_post_ithread, versatile_sic_post_ithread),
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DEVMETHOD(pic_pre_ithread, versatile_sic_pre_ithread),
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DEVMETHOD(pic_setup_intr, versatile_sic_setup_intr),
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DEVMETHOD_END
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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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