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/*-
* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
* 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 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#ifdef DEBUG
#define dprintf(fmt, args...) printf(fmt, ##args)
#else
#define dprintf(fmt, args...)
#endif
#define SIC_STATUS 0x00
#define SIC_RAWSTAT 0x04
#define SIC_ENABLE 0x08
#define SIC_ENSET 0x08
#define SIC_ENCLR 0x0C
#define SIC_SOFTINTSET 0x10
#define SIC_SOFTINTCLR 0x14
#define SIC_PICENABLE 0x20
#define SIC_PICENSET 0x20
#define SIC_PICENCLR 0x24
struct versatile_sic_softc {
device_t sc_dev;
struct resource * mem_res;
};
#define sic_read_4(sc, reg) \
bus_read_4(sc->mem_res, (reg))
#define sic_write_4(sc, reg, val) \
bus_write_4(sc->mem_res, (reg), (val))
static int
versatile_sic_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "arm,versatile-sic"))
return (ENXIO);
device_set_desc(dev, "ARM Versatile SIC");
return (BUS_PROBE_DEFAULT);
}
static int
versatile_sic_attach(device_t dev)
{
struct versatile_sic_softc *sc = device_get_softc(dev);
uint32_t pass_irqs;
int rid;
sc->sc_dev = dev;
/* Request memory resources */
rid = 0;
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->mem_res == NULL) {
device_printf(dev, "Error: could not allocate memory resources\n");
return (ENXIO);
}
/* Disable all interrupts on SIC */
sic_write_4(sc, SIC_ENCLR, 0xffffffff);
/*
* XXX: Enable IRQ3 for KMI
* Should be replaced by proper interrupts cascading
*/
sic_write_4(sc, SIC_ENSET, (1 << 3));
/*
* Let PCI and Ethernet interrupts pass through
* IRQ25, IRQ27..IRQ31
*/
pass_irqs = (7 << 27) | (1 << 25);
sic_write_4(sc, SIC_PICENSET, pass_irqs);
return (0);
}
static device_method_t versatile_sic_methods[] = {
DEVMETHOD(device_probe, versatile_sic_probe),
DEVMETHOD(device_attach, versatile_sic_attach),
{ 0, 0 }
};
static driver_t versatile_sic_driver = {
"sic",
versatile_sic_methods,
sizeof(struct versatile_sic_softc),
};
static devclass_t versatile_sic_devclass;
DRIVER_MODULE(sic, simplebus, versatile_sic_driver, versatile_sic_devclass, 0, 0);
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