184 lines
4.3 KiB
C
184 lines
4.3 KiB
C
/*-
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* Copyright (c) 2014 Warner Losh. 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 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/fdt/fdt_common.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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#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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