80d19ff404
always use 'M. Warner Losh' for consistency. 'All Rights Reserved.' was prescribed by the Buenos Aires Copyright Convention of 1910, but has been mostly dead since the early 1990's and completely meaningless since 2000 when Nicaragua ratified the Berne convention. Some files not done due to ambiguity of various types.
185 lines
4.3 KiB
C
185 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2014 M. Warner Losh.
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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 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 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 "opt_platform.h"
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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/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/resource.h>
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#include <sys/systm.h>
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#include <sys/rman.h>
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#include <machine/armreg.h>
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#include <machine/bus.h>
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#include <machine/frame.h>
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#include <machine/intr.h>
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#include <machine/resource.h>
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#include <arm/at91/at91var.h>
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#include <arm/at91/at91_aicreg.h>
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#ifdef FDT
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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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#endif
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static struct aic_softc {
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struct resource *mem_res; /* Memory resource */
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void *intrhand; /* Interrupt handle */
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device_t sc_dev;
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} *sc;
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static inline uint32_t
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RD4(struct aic_softc *sc, bus_size_t off)
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{
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return (bus_read_4(sc->mem_res, off));
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}
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static inline void
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WR4(struct aic_softc *sc, bus_size_t off, uint32_t val)
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{
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bus_write_4(sc->mem_res, off, val);
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}
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void
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arm_mask_irq(uintptr_t nb)
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{
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WR4(sc, IC_IDCR, 1 << nb);
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}
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int
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arm_get_next_irq(int last __unused)
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{
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int status;
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int irq;
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irq = RD4(sc, IC_IVR);
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status = RD4(sc, IC_ISR);
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if (status == 0) {
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WR4(sc, IC_EOICR, 1);
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return (-1);
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}
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return (irq);
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}
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void
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arm_unmask_irq(uintptr_t nb)
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{
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WR4(sc, IC_IECR, 1 << nb);
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WR4(sc, IC_EOICR, 0);
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}
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static int
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at91_aic_probe(device_t dev)
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{
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#ifdef FDT
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if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-aic"))
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return (ENXIO);
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#endif
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device_set_desc(dev, "AIC");
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return (0);
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}
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static int
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at91_aic_attach(device_t dev)
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{
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int i, rid, err = 0;
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device_printf(dev, "Attach %d\n", bus_current_pass);
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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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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panic("couldn't allocate register resources");
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/*
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* Setup the interrupt table.
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*/
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if (soc_info.soc_data == NULL || soc_info.soc_data->soc_irq_prio == NULL)
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panic("Interrupt priority table missing\n");
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for (i = 0; i < 32; i++) {
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WR4(sc, IC_SVR + i * 4, i);
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/* Priority. */
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WR4(sc, IC_SMR + i * 4, soc_info.soc_data->soc_irq_prio[i]);
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if (i < 8)
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WR4(sc, IC_EOICR, 1);
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}
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WR4(sc, IC_SPU, 32);
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/* No debug. */
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WR4(sc, IC_DCR, 0);
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/* Disable and clear all interrupts. */
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WR4(sc, IC_IDCR, 0xffffffff);
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WR4(sc, IC_ICCR, 0xffffffff);
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enable_interrupts(PSR_I | PSR_F);
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return (err);
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}
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static void
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at91_aic_new_pass(device_t dev)
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{
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device_printf(dev, "Pass %d\n", bus_current_pass);
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}
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static device_method_t at91_aic_methods[] = {
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DEVMETHOD(device_probe, at91_aic_probe),
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DEVMETHOD(device_attach, at91_aic_attach),
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DEVMETHOD(bus_new_pass, at91_aic_new_pass),
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DEVMETHOD_END
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};
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static driver_t at91_aic_driver = {
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"at91_aic",
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at91_aic_methods,
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sizeof(struct aic_softc),
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};
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static devclass_t at91_aic_devclass;
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#ifdef FDT
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EARLY_DRIVER_MODULE(at91_aic, simplebus, at91_aic_driver, at91_aic_devclass,
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NULL, NULL, BUS_PASS_INTERRUPT);
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#else
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EARLY_DRIVER_MODULE(at91_aic, atmelarm, at91_aic_driver, at91_aic_devclass,
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NULL, NULL, BUS_PASS_INTERRUPT);
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#endif
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