freebsd-nq/sys/arm/xscale/pxa/pxa_obio.c
2008-06-10 06:06:15 +00:00

396 lines
10 KiB
C

/*-
* 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 <machine/bus.h>
#include <machine/intr.h>
#include <arm/xscale/pxa/pxavar.h>
#include <arm/xscale/pxa/pxareg.h>
static void pxa_identify(driver_t *, device_t);
static int pxa_probe(device_t);
static int pxa_attach(device_t);
static int pxa_print_child(device_t, device_t);
static int pxa_setup_intr(device_t, device_t, struct resource *, int,
driver_filter_t *, driver_intr_t *, void *, void **);
static int pxa_read_ivar(device_t, device_t, int, uintptr_t *);
static struct resource_list * pxa_get_resource_list(device_t, device_t);
static struct resource * pxa_alloc_resource(device_t, device_t, int,
int *, u_long, u_long, u_long, u_int);
static int pxa_release_resource(device_t, device_t, int,
int, struct resource *);
static int pxa_activate_resource(device_t, device_t,
int, int, struct resource *);
static struct resource * pxa_alloc_gpio_irq(device_t, device_t, int,
int *, u_long, u_long, u_long, u_int);
struct obio_device {
const char *od_name;
u_long od_base;
u_long od_size;
u_int od_irqs[5];
struct resource_list od_resources;
};
static struct obio_device obio_devices[] = {
{ "icu", PXA2X0_INTCTL_BASE, PXA2X0_INTCTL_SIZE, { 0 } },
{ "timer", PXA2X0_OST_BASE, PXA2X0_OST_SIZE, { PXA2X0_INT_OST0, PXA2X0_INT_OST1, PXA2X0_INT_OST2, PXA2X0_INT_OST3, 0 } },
{ "dmac", PXA2X0_DMAC_BASE, PXA2X0_DMAC_SIZE, { PXA2X0_INT_DMA, 0 } },
{ "gpio", PXA2X0_GPIO_BASE, PXA250_GPIO_SIZE, { PXA2X0_INT_GPIO0, PXA2X0_INT_GPIO1, PXA2X0_INT_GPION, 0 } },
{ "uart", PXA2X0_FFUART_BASE, PXA2X0_FFUART_SIZE, { PXA2X0_INT_FFUART, 0 } },
{ "uart", PXA2X0_BTUART_BASE, PXA2X0_BTUART_SIZE, { PXA2X0_INT_BTUART, 0 } },
{ "uart", PXA2X0_STUART_BASE, PXA2X0_STUART_SIZE, { PXA2X0_INT_STUART, 0 } },
{ "uart", PXA2X0_HWUART_BASE, PXA2X0_HWUART_SIZE, { PXA2X0_INT_HWUART, 0 } },
{ "smi", PXA2X0_CS0_START, PXA2X0_CS_SIZE * 6, { 0 } },
{ NULL, 0, 0, { 0 } }
};
void
pxa_identify(driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, 0, "pxa", 0);
}
int
pxa_probe(device_t dev)
{
device_set_desc(dev, "XScale PXA On-board IO");
return (0);
}
int
pxa_attach(device_t dev)
{
struct obio_softc *sc;
struct obio_device *od;
int i;
device_t child;
sc = device_get_softc(dev);
sc->obio_bst = obio_tag;
sc->obio_mem.rm_type = RMAN_ARRAY;
sc->obio_mem.rm_descr = "PXA2X0 OBIO Memory";
if (rman_init(&sc->obio_mem) != 0)
panic("pxa_attach: failed to init obio mem rman");
if (rman_manage_region(&sc->obio_mem, 0, PXA250_PERIPH_END) != 0)
panic("pxa_attach: failed to set up obio mem rman");
sc->obio_irq.rm_type = RMAN_ARRAY;
sc->obio_irq.rm_descr = "PXA2X0 OBIO IRQ";
if (rman_init(&sc->obio_irq) != 0)
panic("pxa_attach: failed to init obio irq rman");
if (rman_manage_region(&sc->obio_irq, 0, 31) != 0)
panic("pxa_attach: failed to set up obio irq rman (main irqs)");
if (rman_manage_region(&sc->obio_irq, IRQ_GPIO0, IRQ_GPIO_MAX) != 0)
panic("pxa_attach: failed to set up obio irq rman (gpio irqs)");
for (od = obio_devices; od->od_name != NULL; od++) {
resource_list_init(&od->od_resources);
resource_list_add(&od->od_resources, SYS_RES_MEMORY, 0,
od->od_base, od->od_base + od->od_size, od->od_size);
for (i = 0; od->od_irqs[i] != 0; i++) {
resource_list_add(&od->od_resources, SYS_RES_IRQ, i,
od->od_irqs[i], od->od_irqs[i], 1);
}
child = device_add_child(dev, od->od_name, -1);
device_set_ivars(child, od);
}
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static int
pxa_print_child(device_t dev, device_t child)
{
struct obio_device *od;
int retval;
od = (struct obio_device *)device_get_ivars(child);
if (od == NULL)
panic("Unknown device on pxa0");
retval = 0;
retval += bus_print_child_header(dev, child);
retval += resource_list_print_type(&od->od_resources, "at mem",
SYS_RES_MEMORY, "0x%08lx");
retval += resource_list_print_type(&od->od_resources, "irq",
SYS_RES_IRQ, "%ld");
retval += bus_print_child_footer(dev, child);
return (retval);
}
static int
pxa_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
driver_filter_t *filter, driver_intr_t *ithread, void *arg, void **cookiep)
{
struct obio_softc *sc;
sc = (struct obio_softc *)device_get_softc(dev);
BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags, filter,
ithread, arg, cookiep);
arm_unmask_irq(rman_get_start(irq));
return (0);
}
static int
pxa_teardown_intr(device_t dev, device_t child, struct resource *ires,
void *cookie)
{
return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, ires, cookie));}
static int
pxa_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct obio_device *od;
od = (struct obio_device *)device_get_ivars(child);
switch (which) {
case PXA_IVAR_BASE:
*((u_long *)result) = od->od_base;
break;
default:
return (ENOENT);
}
return (0);
}
static struct resource_list *
pxa_get_resource_list(device_t dev, device_t child)
{
struct obio_device *od;
od = (struct obio_device *)device_get_ivars(child);
if (od == NULL)
return (NULL);
return (&od->od_resources);
}
static struct resource *
pxa_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct obio_softc *sc;
struct obio_device *od;
struct resource *rv;
struct resource_list *rl;
struct resource_list_entry *rle;
struct rman *rm;
int needactivate;
sc = (struct obio_softc *)device_get_softc(dev);
od = (struct obio_device *)device_get_ivars(child);
rl = &od->od_resources;
rle = resource_list_find(rl, type, *rid);
if (rle == NULL) {
/* We can allocate GPIO-based IRQs lazily. */
if (type == SYS_RES_IRQ)
return (pxa_alloc_gpio_irq(dev, child, type, rid,
start, end, count, flags));
return (NULL);
}
if (rle->res != NULL)
panic("pxa_alloc_resource: resource is busy");
switch (type) {
case SYS_RES_IRQ:
rm = &sc->obio_irq;
break;
case SYS_RES_MEMORY:
rm = &sc->obio_mem;
break;
default:
return (NULL);
}
needactivate = flags & RF_ACTIVE;
flags &= ~RF_ACTIVE;
rv = rman_reserve_resource(rm, rle->start, rle->end, rle->count, flags,
child);
if (rv == NULL)
return (NULL);
rle->res = rv;
rman_set_rid(rv, *rid);
if (type == SYS_RES_MEMORY) {
rman_set_bustag(rv, sc->obio_bst);
rman_set_bushandle(rv, rle->start);
}
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
pxa_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
struct obio_device *od;
struct resource_list *rl;
struct resource_list_entry *rle;
od = (struct obio_device *)device_get_ivars(child);
rl = &od->od_resources;
if (type == SYS_RES_IOPORT)
type = SYS_RES_MEMORY;
rle = resource_list_find(rl, type, rid);
if (!rle)
panic("pxa_release_resource: can't find resource");
if (!rle->res)
panic("pxa_release_resource: resource entry is not busy");
rman_release_resource(rle->res);
rle->res = NULL;
return (0);
}
static int
pxa_activate_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
return (rman_activate_resource(r));
}
static device_method_t pxa_methods[] = {
DEVMETHOD(device_identify, pxa_identify),
DEVMETHOD(device_probe, pxa_probe),
DEVMETHOD(device_attach, pxa_attach),
DEVMETHOD(bus_print_child, pxa_print_child),
DEVMETHOD(bus_read_ivar, pxa_read_ivar),
DEVMETHOD(bus_setup_intr, pxa_setup_intr),
DEVMETHOD(bus_teardown_intr, pxa_teardown_intr),
DEVMETHOD(bus_get_resource_list, pxa_get_resource_list),
DEVMETHOD(bus_alloc_resource, pxa_alloc_resource),
DEVMETHOD(bus_release_resource, pxa_release_resource),
DEVMETHOD(bus_activate_resource, pxa_activate_resource),
{0, 0}
};
static driver_t pxa_driver = {
"pxa",
pxa_methods,
sizeof(struct obio_softc),
};
static devclass_t pxa_devclass;
DRIVER_MODULE(pxa, nexus, pxa_driver, pxa_devclass, 0, 0);
static struct resource *
pxa_alloc_gpio_irq(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct obio_softc *sc;
struct obio_device *od;
struct resource_list *rl;
struct resource_list_entry *rle;
struct resource *rv;
struct rman *rm;
int needactivate;
sc = device_get_softc(dev);
od = device_get_ivars(child);
rl = &od->od_resources;
rm = &sc->obio_irq;
needactivate = flags & RF_ACTIVE;
flags &= ~RF_ACTIVE;
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == NULL)
return (NULL);
resource_list_add(rl, type, *rid, start, end, count);
rle = resource_list_find(rl, type, *rid);
if (rle == NULL)
panic("pxa_alloc_gpio_irq: unexpectedly can't find resource");
rle->res = rv;
rle->start = rman_get_start(rv);
rle->end = rman_get_end(rv);
rle->count = count;
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return (NULL);
}
}
if (bootverbose)
device_printf(dev, "lazy allocation of irq %ld for %s\n",
start, device_get_nameunit(child));
return (rv);
}