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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/mips/idt/obio.c |
/*-
* Copyright (c) 2007, Oleksandr Tymoshenko <gonzo@freebsd.org>
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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: release/9.1.0/sys/mips/idt/obio.c 212413 2010-09-10 11:19:03Z avg $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <mips/idt/idtreg.h>
#include <mips/idt/obiovar.h>
#define ICU_REG_READ(o) \
*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_ICU + (o)))
#define ICU_REG_WRITE(o,v) (ICU_REG_READ(o)) = (v)
#define GPIO_REG_READ(o) \
*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_GPIO + (o)))
#define GPIO_REG_WRITE(o,v) (GPIO_REG_READ(o)) = (v)
static int obio_activate_resource(device_t, device_t, int, int,
struct resource *);
static device_t obio_add_child(device_t, u_int, const char *, int);
static struct resource *
obio_alloc_resource(device_t, device_t, int, int *, u_long,
u_long, u_long, u_int);
static int obio_attach(device_t);
static int obio_deactivate_resource(device_t, device_t, int, int,
struct resource *);
static struct resource_list *
obio_get_resource_list(device_t, device_t);
static void obio_hinted_child(device_t, const char *, int);
static int obio_intr(void *);
static int obio_probe(device_t);
static int obio_release_resource(device_t, device_t, int, int,
struct resource *);
static int obio_setup_intr(device_t, device_t, struct resource *, int,
driver_filter_t *, driver_intr_t *, void *, void **);
static int obio_teardown_intr(device_t, device_t, struct resource *,
void *);
static void
obio_mask_irq(void *arg)
{
unsigned int irq = (unsigned int)arg;
int ip_bit, mask, mask_register;
/* mask IRQ */
mask_register = ICU_IRQ_MASK_REG(irq);
ip_bit = ICU_IP_BIT(irq);
mask = ICU_REG_READ(mask_register);
ICU_REG_WRITE(mask_register, mask | ip_bit);
}
static void
obio_unmask_irq(void *arg)
{
unsigned int irq = (unsigned int)arg;
int ip_bit, mask, mask_register;
/* unmask IRQ */
mask_register = ICU_IRQ_MASK_REG(irq);
ip_bit = ICU_IP_BIT(irq);
mask = ICU_REG_READ(mask_register);
ICU_REG_WRITE(mask_register, mask & ~ip_bit);
}
static int
obio_probe(device_t dev)
{
return (0);
}
static int
obio_attach(device_t dev)
{
struct obio_softc *sc = device_get_softc(dev);
int rid, irq;
sc->oba_mem_rman.rm_type = RMAN_ARRAY;
sc->oba_mem_rman.rm_descr = "OBIO memeory";
if (rman_init(&sc->oba_mem_rman) != 0 ||
rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START,
OBIO_MEM_START + OBIO_MEM_SIZE) != 0)
panic("obio_attach: failed to set up I/O rman");
sc->oba_irq_rman.rm_type = RMAN_ARRAY;
sc->oba_irq_rman.rm_descr = "OBIO IRQ";
if (rman_init(&sc->oba_irq_rman) != 0 ||
rman_manage_region(&sc->oba_irq_rman, IRQ_BASE, IRQ_END) != 0)
panic("obio_attach: failed to set up IRQ rman");
/* Hook up our interrupt handlers. We should handle IRQ0..IRQ4*/
for(irq = 0; irq < 5; irq++) {
if ((sc->sc_irq[irq] = bus_alloc_resource(dev, SYS_RES_IRQ,
&rid, irq, irq, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
device_printf(dev, "unable to allocate IRQ resource\n");
return (ENXIO);
}
if ((bus_setup_intr(dev, sc->sc_irq[irq], INTR_TYPE_MISC,
obio_intr, NULL, sc, &sc->sc_ih[irq]))) {
device_printf(dev,
"WARNING: unable to register interrupt handler\n");
return (ENXIO);
}
}
bus_generic_probe(dev);
bus_enumerate_hinted_children(dev);
bus_generic_attach(dev);
return (0);
}
static struct resource *
obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct obio_softc *sc = device_get_softc(bus);
struct obio_ivar *ivar = device_get_ivars(child);
struct resource *rv;
struct resource_list_entry *rle;
struct rman *rm;
int isdefault, needactivate, passthrough;
isdefault = (start == 0UL && end == ~0UL);
needactivate = flags & RF_ACTIVE;
passthrough = (device_get_parent(child) != bus);
rle = NULL;
if (passthrough)
return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
rid, start, end, count, flags));
/*
* If this is an allocation of the "default" range for a given RID,
* and we know what the resources for this device are (ie. they aren't
* maintained by a child bus), then work out the start/end values.
*/
if (isdefault) {
rle = resource_list_find(&ivar->resources, type, *rid);
if (rle == NULL)
return (NULL);
if (rle->res != NULL) {
panic("%s: resource entry is busy", __func__);
}
start = rle->start;
end = rle->end;
count = rle->count;
}
switch (type) {
case SYS_RES_IRQ:
rm = &sc->oba_irq_rman;
break;
case SYS_RES_MEMORY:
rm = &sc->oba_mem_rman;
break;
default:
printf("%s: unknown resource type %d\n", __func__, type);
return (0);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == 0) {
printf("%s: could not reserve resource\n", __func__);
return (0);
}
rman_set_rid(rv, *rid);
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
printf("%s: could not activate resource\n", __func__);
rman_release_resource(rv);
return (0);
}
}
return (rv);
}
static int
obio_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
/* XXX: should we mask/unmask IRQ here? */
return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child,
type, rid, r));
}
static int
obio_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
/* XXX: should we mask/unmask IRQ here? */
return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus), child,
type, rid, r));
}
static int
obio_release_resource(device_t dev, device_t child, int type,
int rid, struct resource *r)
{
struct resource_list *rl;
struct resource_list_entry *rle;
rl = obio_get_resource_list(dev, child);
if (rl == NULL)
return (EINVAL);
rle = resource_list_find(rl, type, rid);
if (rle == NULL)
return (EINVAL);
rman_release_resource(r);
rle->res = NULL;
return (0);
}
static int
obio_setup_intr(device_t dev, device_t child, struct resource *ires,
int flags, driver_filter_t *filt, driver_intr_t *handler,
void *arg, void **cookiep)
{
struct obio_softc *sc = device_get_softc(dev);
struct intr_event *event;
int irq, ip_bit, error, mask, mask_register;
irq = rman_get_start(ires);
if (irq >= NIRQS)
panic("%s: bad irq %d", __func__, irq);
event = sc->sc_eventstab[irq];
if (event == NULL) {
error = intr_event_create(&event, (void *)irq, 0, irq,
obio_mask_irq, obio_unmask_irq,
NULL, NULL,
"obio intr%d:", irq);
sc->sc_eventstab[irq] = event;
}
intr_event_add_handler(event, device_get_nameunit(child), filt,
handler, arg, intr_priority(flags), flags, cookiep);
/* unmask IRQ */
mask_register = ICU_IRQ_MASK_REG(irq);
ip_bit = ICU_IP_BIT(irq);
mask = ICU_REG_READ(mask_register);
ICU_REG_WRITE(mask_register, mask & ~ip_bit);
return (0);
}
static int
obio_teardown_intr(device_t dev, device_t child, struct resource *ires,
void *cookie)
{
struct obio_softc *sc = device_get_softc(dev);
int irq, result;
uint32_t mask_register, mask, ip_bit;
irq = rman_get_start(ires);
if (irq >= NIRQS)
panic("%s: bad irq %d", __func__, irq);
if (sc->sc_eventstab[irq] == NULL)
panic("Trying to teardown unoccupied IRQ");
/* mask IRQ */
mask_register = ICU_IRQ_MASK_REG(irq);
ip_bit = ICU_IP_BIT(irq);
mask = ICU_REG_READ(mask_register);
ICU_REG_WRITE(mask_register, mask | ip_bit);
result = intr_event_remove_handler(cookie);
if (!result)
sc->sc_eventstab[irq] = NULL;
return (result);
}
static int
obio_intr(void *arg)
{
struct obio_softc *sc = arg;
struct intr_event *event;
uint32_t irqstat, ipend, imask, xpend;
int irq, thread, group, i;
irqstat = 0;
irq = 0;
for (group = 2; group <= 6; group++) {
ipend = ICU_REG_READ(ICU_GROUP_IPEND_REG(group));
imask = ICU_REG_READ(ICU_GROUP_MASK_REG(group));
xpend = ipend;
ipend &= ~imask;
while ((i = fls(xpend)) != 0) {
xpend &= ~(1 << (i - 1));
irq = IP_IRQ(group, i - 1);
}
while ((i = fls(ipend)) != 0) {
ipend &= ~(1 << (i - 1));
irq = IP_IRQ(group, i - 1);
event = sc->sc_eventstab[irq];
thread = 0;
if (!event || TAILQ_EMPTY(&event->ie_handlers)) {
/* TODO: Log stray IRQs */
continue;
}
/* TODO: frame instead of NULL? */
intr_event_handle(event, NULL);
/* XXX: Log stray IRQs */
}
}
#if 0
ipend = ICU_REG_READ(ICU_IPEND2);
printf("ipend2 = %08x!\n", ipend);
ipend = ICU_REG_READ(ICU_IPEND3);
printf("ipend3 = %08x!\n", ipend);
ipend = ICU_REG_READ(ICU_IPEND4);
printf("ipend4 = %08x!\n", ipend);
ipend = ICU_REG_READ(ICU_IPEND5);
printf("ipend5 = %08x!\n", ipend);
ipend = ICU_REG_READ(ICU_IPEND6);
printf("ipend6 = %08x!\n", ipend);
#endif
while (irqstat != 0) {
if ((irqstat & 1) == 1) {
}
irq++;
irqstat >>= 1;
}
return (FILTER_HANDLED);
}
static void
obio_hinted_child(device_t bus, const char *dname, int dunit)
{
device_t child;
long maddr;
int msize;
int irq;
int result;
child = BUS_ADD_CHILD(bus, 0, dname, dunit);
/*
* Set hard-wired resources for hinted child using
* specific RIDs.
*/
resource_long_value(dname, dunit, "maddr", &maddr);
resource_int_value(dname, dunit, "msize", &msize);
result = bus_set_resource(child, SYS_RES_MEMORY, 0,
maddr, msize);
if (result != 0)
device_printf(bus, "warning: bus_set_resource() failed\n");
if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
if (result != 0)
device_printf(bus,
"warning: bus_set_resource() failed\n");
}
}
static device_t
obio_add_child(device_t bus, u_int order, const char *name, int unit)
{
device_t child;
struct obio_ivar *ivar;
ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO);
if (ivar == NULL) {
printf("Failed to allocate ivar\n");
return (0);
}
resource_list_init(&ivar->resources);
child = device_add_child_ordered(bus, order, name, unit);
if (child == NULL) {
printf("Can't add child %s%d ordered\n", name, unit);
return (0);
}
device_set_ivars(child, ivar);
return (child);
}
/*
* Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource
* Provides pointer to resource_list for these routines
*/
static struct resource_list *
obio_get_resource_list(device_t dev, device_t child)
{
struct obio_ivar *ivar;
ivar = device_get_ivars(child);
return (&(ivar->resources));
}
static device_method_t obio_methods[] = {
DEVMETHOD(bus_activate_resource, obio_activate_resource),
DEVMETHOD(bus_add_child, obio_add_child),
DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource),
DEVMETHOD(bus_get_resource_list, obio_get_resource_list),
DEVMETHOD(bus_hinted_child, obio_hinted_child),
DEVMETHOD(bus_release_resource, obio_release_resource),
DEVMETHOD(bus_setup_intr, obio_setup_intr),
DEVMETHOD(bus_teardown_intr, obio_teardown_intr),
DEVMETHOD(device_attach, obio_attach),
DEVMETHOD(device_probe, obio_probe),
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
{0, 0},
};
static driver_t obio_driver = {
"obio",
obio_methods,
sizeof(struct obio_softc),
};
static devclass_t obio_devclass;
DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);