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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 Benno Rice. 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 ``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 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/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <sys/timetc.h>
#include <machine/armreg.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <arm/xscale/pxa/pxavar.h>
#include <arm/xscale/pxa/pxareg.h>
struct pxa_icu_softc {
struct resource * pi_res[1];
bus_space_tag_t pi_bst;
bus_space_handle_t pi_bsh;
};
static struct resource_spec pxa_icu_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ -1, 0 }
};
static struct pxa_icu_softc *pxa_icu_softc = NULL;
static int pxa_icu_probe(device_t);
static int pxa_icu_attach(device_t);
uint32_t pxa_icu_get_icip(void);
void pxa_icu_clear_icip(int);
uint32_t pxa_icu_get_icfp(void);
void pxa_icu_clear_icfp(int);
uint32_t pxa_icu_get_icmr(void);
void pxa_icu_set_icmr(uint32_t);
uint32_t pxa_icu_get_iclr(void);
void pxa_icu_set_iclr(uint32_t);
uint32_t pxa_icu_get_icpr(void);
void pxa_icu_idle_enable(void);
void pxa_icu_idle_disable(void);
extern uint32_t pxa_gpio_intr_flags[];
static int
pxa_icu_probe(device_t dev)
{
device_set_desc(dev, "Interrupt Controller");
return (0);
}
static int
pxa_icu_attach(device_t dev)
{
int error;
struct pxa_icu_softc *sc;
sc = (struct pxa_icu_softc *)device_get_softc(dev);
if (pxa_icu_softc != NULL)
return (ENXIO);
pxa_icu_softc = sc;
error = bus_alloc_resources(dev, pxa_icu_spec, sc->pi_res);
if (error) {
device_printf(dev, "could not allocate resources\n");
return (ENXIO);
}
sc->pi_bst = rman_get_bustag(sc->pi_res[0]);
sc->pi_bsh = rman_get_bushandle(sc->pi_res[0]);
/* Disable all interrupts. */
pxa_icu_set_icmr(0);
/* Route all interrupts to IRQ rather than FIQ. */
pxa_icu_set_iclr(0);
/* XXX: This should move to configure_final or something. */
enable_interrupts(PSR_I|PSR_F);
return (0);
}
static device_method_t pxa_icu_methods[] = {
DEVMETHOD(device_probe, pxa_icu_probe),
DEVMETHOD(device_attach, pxa_icu_attach),
{0, 0}
};
static driver_t pxa_icu_driver = {
"icu",
pxa_icu_methods,
sizeof(struct pxa_icu_softc),
};
static devclass_t pxa_icu_devclass;
DRIVER_MODULE(pxaicu, pxa, pxa_icu_driver, pxa_icu_devclass, 0, 0);
int
arm_get_next_irq(int last __unused)
{
int irq;
if ((irq = pxa_icu_get_icip()) != 0) {
return (ffs(irq) - 1);
}
return (pxa_gpio_get_next_irq());
}
void
arm_mask_irq(uintptr_t nb)
{
uint32_t mr;
if (nb >= IRQ_GPIO0) {
pxa_gpio_mask_irq(nb);
return;
}
mr = pxa_icu_get_icmr();
mr &= ~(1 << nb);
pxa_icu_set_icmr(mr);
}
void
arm_unmask_irq(uintptr_t nb)
{
uint32_t mr;
if (nb >= IRQ_GPIO0) {
pxa_gpio_unmask_irq(nb);
return;
}
mr = pxa_icu_get_icmr();
mr |= (1 << nb);
pxa_icu_set_icmr(mr);
}
uint32_t
pxa_icu_get_icip(void)
{
return (bus_space_read_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_IP));
}
void
pxa_icu_clear_icip(int irq)
{
bus_space_write_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_IP, (1 << irq));
}
uint32_t
pxa_icu_get_icfp(void)
{
return (bus_space_read_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_FP));
}
void
pxa_icu_clear_icfp(int irq)
{
bus_space_write_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_FP, (1 << irq));
}
uint32_t
pxa_icu_get_icmr(void)
{
return (bus_space_read_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_MR));
}
void
pxa_icu_set_icmr(uint32_t val)
{
bus_space_write_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_MR, val);
}
uint32_t
pxa_icu_get_iclr(void)
{
return (bus_space_read_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_LR));
}
void
pxa_icu_set_iclr(uint32_t val)
{
bus_space_write_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_LR, val);
}
uint32_t
pxa_icu_get_icpr(void)
{
return (bus_space_read_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_PR));
}
void
pxa_icu_idle_enable(void)
{
bus_space_write_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_CR, 0x0);
}
void
pxa_icu_idle_disable(void)
{
bus_space_write_4(pxa_icu_softc->pi_bst,
pxa_icu_softc->pi_bsh, ICU_CR, 0x1);
}
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