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/*-
* Copyright (c) 2014 Warner Losh. All rights reserved.
*
* 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 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 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 "opt_platform.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <sys/systm.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/frame.h>
#include <machine/intr.h>
#include <machine/resource.h>
#include <arm/at91/at91var.h>
#include <arm/at91/at91_aicreg.h>
#ifdef FDT
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#endif
static struct aic_softc {
struct resource *mem_res; /* Memory resource */
void *intrhand; /* Interrupt handle */
device_t sc_dev;
} *sc;
static inline uint32_t
RD4(struct aic_softc *sc, bus_size_t off)
{
return (bus_read_4(sc->mem_res, off));
}
static inline void
WR4(struct aic_softc *sc, bus_size_t off, uint32_t val)
{
bus_write_4(sc->mem_res, off, val);
}
void
arm_mask_irq(uintptr_t nb)
{
WR4(sc, IC_IDCR, 1 << nb);
}
int
arm_get_next_irq(int last __unused)
{
int status;
int irq;
irq = RD4(sc, IC_IVR);
status = RD4(sc, IC_ISR);
if (status == 0) {
WR4(sc, IC_EOICR, 1);
return (-1);
}
return (irq);
}
void
arm_unmask_irq(uintptr_t nb)
{
WR4(sc, IC_IECR, 1 << nb);
WR4(sc, IC_EOICR, 0);
}
static int
at91_aic_probe(device_t dev)
{
#ifdef FDT
if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-aic"))
return (ENXIO);
#endif
device_set_desc(dev, "AIC");
return (0);
}
static int
at91_aic_attach(device_t dev)
{
int i, rid, err = 0;
device_printf(dev, "Attach %d\n", bus_current_pass);
sc = device_get_softc(dev);
sc->sc_dev = dev;
rid = 0;
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->mem_res == NULL)
panic("couldn't allocate register resources");
/*
* Setup the interrupt table.
*/
if (soc_info.soc_data == NULL || soc_info.soc_data->soc_irq_prio == NULL)
panic("Interrupt priority table missing\n");
for (i = 0; i < 32; i++) {
WR4(sc, IC_SVR + i * 4, i);
/* Priority. */
WR4(sc, IC_SMR + i * 4, soc_info.soc_data->soc_irq_prio[i]);
if (i < 8)
WR4(sc, IC_EOICR, 1);
}
WR4(sc, IC_SPU, 32);
/* No debug. */
WR4(sc, IC_DCR, 0);
/* Disable and clear all interrupts. */
WR4(sc, IC_IDCR, 0xffffffff);
WR4(sc, IC_ICCR, 0xffffffff);
enable_interrupts(I32_bit | F32_bit);
return (err);
}
static void
at91_aic_new_pass(device_t dev)
{
device_printf(dev, "Pass %d\n", bus_current_pass);
}
static device_method_t at91_aic_methods[] = {
DEVMETHOD(device_probe, at91_aic_probe),
DEVMETHOD(device_attach, at91_aic_attach),
DEVMETHOD(bus_new_pass, at91_aic_new_pass),
DEVMETHOD_END
};
static driver_t at91_aic_driver = {
"at91_aic",
at91_aic_methods,
sizeof(struct aic_softc),
};
static devclass_t at91_aic_devclass;
#ifdef FDT
DRIVER_MODULE(at91_aic, simplebus, at91_aic_driver, at91_aic_devclass, NULL,
NULL);
#else
DRIVER_MODULE(at91_aic, atmelarm, at91_aic_driver, at91_aic_devclass, NULL,
NULL);
#endif
/* not yet
EARLY_DRIVER_MODULE(at91_aic, simplebus, at91_aic_driver, at91_aic_devclass,
NULL, NULL, BUS_PASS_INTERRUPT);
*/
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