/* $NetBSD: sacc_hpcarm.c,v 1.15 2023/12/20 14:50:02 thorpej Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by IWAMOTO Toshihiro.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Platform dependent part for SA-11[01]1 companion chip on hpcarm.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sacc_hpcarm.c,v 1.15 2023/12/20 14:50:02 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/uio.h>
#include <sys/bus.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>
#include <arm/sa11x0/sa11x0_reg.h>
#include <arm/sa11x0/sa11x0_var.h>
#include <arm/sa11x0/sa11x0_gpioreg.h>
#include <arm/sa11x0/sa1111_reg.h>
#include <arm/sa11x0/sa1111_var.h>
static void sacc_attach(device_t, device_t, void *);
static int sacc_intr(void *);
struct platid_data sacc_platid_table[] = {
{ &platid_mask_MACH_HP_JORNADA_7XX, (void *)1 },
{ NULL, NULL }
};
CFATTACH_DECL_NEW(sacc, sizeof(struct sacc_softc),
sacc_probe, sacc_attach, NULL, NULL);
#ifdef INTR_DEBUG
#define DPRINTF(arg) aprint_normal arg
#else
#define DPRINTF(arg)
#endif
static void
sacc_attach(device_t parent, device_t self, void *aux)
{
int i, gpiopin;
uint32_t skid;
struct sacc_softc *sc = device_private(self);
struct sa11x0_softc *psc = device_private(parent);
struct sa11x0_attach_args *sa = aux;
struct platid_data *p;
aprint_normal("\n");
sc->sc_dev = self;
sc->sc_iot = sa->sa_iot;
sc->sc_piot = psc->sc_iot;
sc->sc_gpioh = psc->sc_gpioh;
p = platid_search_data(&platid, sacc_platid_table);
if (p == NULL)
return;
gpiopin = (int)p->data;
sc->sc_gpiomask = 1 << gpiopin;
if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0,
&sc->sc_ioh)) {
aprint_normal_dev(self, "unable to map registers\n");
return;
}
skid = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCSBI_SKID);
aprint_normal_dev(self, "SA-1111 rev %d.%d\n",
(skid & 0xf0) >> 4, skid & 0xf);
for (i = 0; i < SACCIC_LEN; i++)
sc->sc_intrhand[i] = NULL;
/* initialize SA-1111 interrupt controller */
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0, 0);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1, 0);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTTSTSEL, 0);
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
SACCIC_INTSTATCLR0, 0xffffffff);
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
SACCIC_INTSTATCLR1, 0xffffffff);
/* connect to SA-1110's GPIO intr */
sa11x0_intr_establish(0, gpiopin, 1, IPL_SERIAL, sacc_intr, sc);
/* attach each devices */
config_search(self, NULL,
CFARGS(.search = sa1111_search));
}
static int
sacc_intr(void *arg)
{
int i;
uint32_t mask;
struct sacc_intrvec intstat;
struct sacc_softc *sc = arg;
struct sacc_intrhand *ih;
intstat.lo =
bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR0);
intstat.hi =
bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR1);
DPRINTF(("sacc_intr: %x %x\n", intstat.lo, intstat.hi));
/* clear SA-1110's GPIO intr status */
bus_space_write_4(sc->sc_piot, sc->sc_gpioh,
SAGPIO_EDR, sc->sc_gpiomask);
for (i = 0, mask = 1; i < 32; i++, mask <<= 1)
if (intstat.lo & mask) {
/*
* Clear intr status before calling intr handlers.
* This cause stray interrupts, but clearing
* after calling intr handlers cause intr lossage.
*/
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
SACCIC_INTSTATCLR0, 1 << i);
for (ih = sc->sc_intrhand[i]; ih; ih = ih->ih_next)
softint_schedule(ih->ih_soft);
}
for (i = 0, mask = 1; i < SACCIC_LEN - 32; i++, mask <<= 1)
if (intstat.hi & mask) {
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
SACCIC_INTSTATCLR1, 1 << i);
for (ih = sc->sc_intrhand[i + 32]; ih; ih = ih->ih_next)
softint_schedule(ih->ih_soft);
}
return 1;
}
