NetBSD-5.0.2/sys/arch/arm/sa11x0/sa1111.c
/* $NetBSD: sa1111.c,v 1.22 2008/04/28 20:23:14 martin 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.
*/
/*
* TODO:
* - introduce bus abstraction to support SA-1101
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sa1111.c,v 1.22 2008/04/28 20:23:14 martin 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/malloc.h>
#include <sys/uio.h>
#include <machine/bus.h>
#include <machine/intr.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>
#include "locators.h"
static int sa1111_print(void *, const char *);
static void sacc_intr_calculatemasks(struct sacc_softc *);
static void sacc_intr_setpolarity(sacc_chipset_tag_t *, int , int);
#ifdef INTR_DEBUG
#define DPRINTF(arg) printf arg
#else
#define DPRINTF(arg)
#endif
int
sacc_probe(struct device *parent, struct cfdata *match, void *aux)
{
struct sa11x0_attach_args *sa = aux;
bus_space_handle_t ioh;
uint32_t skid;
if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, &ioh))
return 0;
skid = bus_space_read_4(sa->sa_iot, ioh, SACCSBI_SKID);
bus_space_unmap(sa->sa_iot, ioh, sa->sa_size);
if ((skid & 0xffffff00) != 0x690cc200)
return 0;
return 1;
}
int
sa1111_search(struct device *parent, struct cfdata *cf, const int *ldesc,
void *aux)
{
struct sa1111_attach_args aa;
aa.sa_addr = cf->cf_loc[SACCCF_ADDR];
aa.sa_size = cf->cf_loc[SACCCF_SIZE];
aa.sa_intr = cf->cf_loc[SACCCF_INTR];
#if 0
aa.sa_membase = cf->cf_loc[SACCCF_MEMBASE];
aa.sa_memsize = cf->cf_loc[SACCCF_MEMSIZE];
#endif
if (config_match(parent, cf, &aa) > 0)
config_attach(parent, cf, &aa, sa1111_print);
return 0;
}
static int
sa1111_print(void *aux, const char *name)
{
return UNCONF;
}
void *
sacc_intr_establish(sacc_chipset_tag_t *ic, int irq, int type, int level,
int (*ih_fun)(void *), void *ih_arg)
{
int s;
struct sacc_softc *sc = (struct sacc_softc *)ic;
struct sacc_intrhand **p, *ih;
/* no point in sleeping unless someone can free memory. */
ih = malloc(sizeof *ih, M_DEVBUF, cold ? M_NOWAIT : M_WAITOK);
if (ih == NULL)
panic("sacc_intr_establish: can't malloc handler info");
if (irq < 0 || irq > SACCIC_LEN ||
!(type == IST_EDGE_RAISE || type == IST_EDGE_FALL))
panic("sacc_intr_establish: bogus irq or type");
if (sc->sc_intrhand[irq] == NULL) {
sacc_intr_setpolarity(ic, irq, type);
sc->sc_intrtype[irq] = type;
} else if (sc->sc_intrtype[irq] != type)
/* XXX we should be able to share raising and
* falling edge intrs */
panic("sacc_intr_establish: type must be unique");
/* install intr handler */
/* map interrupt level to appropriate softinterrupt level */
level = SOFTINT_SERIAL;
ih->ih_soft = softint_establish(level, (void (*)(void *)) ih_fun,
ih_arg);
ih->ih_irq = irq;
ih->ih_next = NULL;
s = splhigh();
for (p = &sc->sc_intrhand[irq]; *p; p = &(*p)->ih_next)
continue;
*p = ih;
sacc_intr_calculatemasks(sc);
splx(s);
return ih;
}
void
sacc_intr_disestablish(sacc_chipset_tag_t *ic, void *arg)
{
int irq, s;
struct sacc_softc *sc = (struct sacc_softc *)ic;
struct sacc_intrhand *ih, **p;
ih = (struct sacc_intrhand *)arg;
irq = ih->ih_irq;
#ifdef DIAGNOSTIC
if (irq < 0 || irq > SACCIC_LEN)
panic("sacc_intr_disestablish: bogus irq");
#endif
s = splhigh();
for (p = &sc->sc_intrhand[irq];; p = &(*p)->ih_next) {
if (*p == NULL)
panic("sacc_intr_disestablish: handler not registered");
if (*p == ih)
break;
}
*p = (*p)->ih_next;
sacc_intr_calculatemasks(sc);
splx(s);
free(ih, M_DEVBUF);
}
static void
sacc_intr_setpolarity(sacc_chipset_tag_t *ic, int irq, int type)
{
struct sacc_softc *sc = (struct sacc_softc *)ic;
int s;
uint32_t pol, mask;
int addr;
if (irq >= 32) {
addr = SACCIC_INTPOL1;
irq -= 32;
} else
addr = SACCIC_INTPOL0;
mask = (1 << irq);
s = splhigh();
pol = bus_space_read_4(sc->sc_iot, sc->sc_ioh, addr);
if (type == IST_EDGE_RAISE)
pol &= ~mask;
else
pol |= mask;
bus_space_write_4(sc->sc_iot, sc->sc_ioh, addr, pol);
splx(s);
}
static void
sacc_intr_calculatemasks(struct sacc_softc *sc)
{
int irq;
sc->sc_imask.lo = 0;
sc->sc_imask.hi = 0;
for (irq = 0; irq < 32; irq++)
if (sc->sc_intrhand[irq])
sc->sc_imask.lo |= (1 << irq);
for (irq = 0; irq < SACCIC_LEN - 32; irq++)
if (sc->sc_intrhand[irq + 32])
sc->sc_imask.hi |= (1 << irq);
/* XXX this should not be done here */
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0,
sc->sc_imask.lo);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1,
sc->sc_imask.hi);
DPRINTF(("sacc_intr_calculatemasks: %x %x\n", sc->sc_imask.lo,
sc->sc_imask.hi));
}