269 lines
6.4 KiB
C
269 lines
6.4 KiB
C
/*-
|
|
* Copyright (c) 2006 M. Warner Losh. 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/conf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/rman.h>
|
|
#include <machine/bus.h>
|
|
|
|
#include <arm/at91/at91_pioreg.h>
|
|
|
|
struct at91_pio_softc
|
|
{
|
|
device_t dev; /* Myself */
|
|
void *intrhand; /* Interrupt handle */
|
|
struct resource *irq_res; /* IRQ resource */
|
|
struct resource *mem_res; /* Memory resource */
|
|
struct mtx sc_mtx; /* basically a perimeter lock */
|
|
struct cdev *cdev;
|
|
int flags;
|
|
#define OPENED 1
|
|
};
|
|
|
|
static inline uint32_t
|
|
RD4(struct at91_pio_softc *sc, bus_size_t off)
|
|
{
|
|
return bus_read_4(sc->mem_res, off);
|
|
}
|
|
|
|
static inline void
|
|
WR4(struct at91_pio_softc *sc, bus_size_t off, uint32_t val)
|
|
{
|
|
bus_write_4(sc->mem_res, off, val);
|
|
}
|
|
|
|
#define AT91_PIO_LOCK(_sc) mtx_lock_spin(&(_sc)->sc_mtx)
|
|
#define AT91_PIO_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->sc_mtx)
|
|
#define AT91_PIO_LOCK_INIT(_sc) \
|
|
mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
|
|
"pio", MTX_SPIN)
|
|
#define AT91_PIO_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
|
|
#define AT91_PIO_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
|
|
#define AT91_PIO_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
|
|
#define CDEV2SOFTC(dev) ((dev)->si_drv1)
|
|
|
|
static devclass_t at91_pio_devclass;
|
|
|
|
/* bus entry points */
|
|
|
|
static int at91_pio_probe(device_t dev);
|
|
static int at91_pio_attach(device_t dev);
|
|
static int at91_pio_detach(device_t dev);
|
|
static void at91_pio_intr(void *);
|
|
|
|
/* helper routines */
|
|
static int at91_pio_activate(device_t dev);
|
|
static void at91_pio_deactivate(device_t dev);
|
|
|
|
/* cdev routines */
|
|
static d_open_t at91_pio_open;
|
|
static d_close_t at91_pio_close;
|
|
static d_ioctl_t at91_pio_ioctl;
|
|
|
|
static struct cdevsw at91_pio_cdevsw =
|
|
{
|
|
.d_version = D_VERSION,
|
|
.d_open = at91_pio_open,
|
|
.d_close = at91_pio_close,
|
|
.d_ioctl = at91_pio_ioctl
|
|
};
|
|
|
|
static int
|
|
at91_pio_probe(device_t dev)
|
|
{
|
|
device_set_desc(dev, "PIO");
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
at91_pio_attach(device_t dev)
|
|
{
|
|
struct at91_pio_softc *sc = device_get_softc(dev);
|
|
int err;
|
|
|
|
sc->dev = dev;
|
|
err = at91_pio_activate(dev);
|
|
if (err)
|
|
goto out;
|
|
|
|
AT91_PIO_LOCK_INIT(sc);
|
|
|
|
/*
|
|
* Activate the interrupt, but disable all interrupts in the hardware
|
|
*/
|
|
WR4(sc, PIO_IDR, 0xffffffff);
|
|
err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_FAST,
|
|
at91_pio_intr, sc, &sc->intrhand);
|
|
if (err) {
|
|
AT91_PIO_LOCK_DESTROY(sc);
|
|
goto out;
|
|
}
|
|
sc->cdev = make_dev(&at91_pio_cdevsw, device_get_unit(dev), UID_ROOT
|
|
, GID_WHEEL, 0600, "pio%d", device_get_unit(dev));
|
|
if (sc->cdev == NULL) {
|
|
err = ENOMEM;
|
|
goto out;
|
|
}
|
|
sc->cdev->si_drv1 = sc;
|
|
out:;
|
|
if (err)
|
|
at91_pio_deactivate(dev);
|
|
return (err);
|
|
}
|
|
|
|
static int
|
|
at91_pio_detach(device_t dev)
|
|
{
|
|
return (EBUSY); /* XXX */
|
|
}
|
|
|
|
static int
|
|
at91_pio_activate(device_t dev)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
int rid;
|
|
|
|
sc = device_get_softc(dev);
|
|
rid = 0;
|
|
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
|
|
RF_ACTIVE);
|
|
if (sc->mem_res == NULL)
|
|
goto errout;
|
|
rid = 0;
|
|
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
|
|
RF_ACTIVE | RF_SHAREABLE);
|
|
if (sc->irq_res == NULL)
|
|
goto errout;
|
|
return (0);
|
|
errout:
|
|
at91_pio_deactivate(dev);
|
|
return (ENOMEM);
|
|
}
|
|
|
|
static void
|
|
at91_pio_deactivate(device_t dev)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
if (sc->intrhand)
|
|
bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
|
|
sc->intrhand = 0;
|
|
bus_generic_detach(sc->dev);
|
|
if (sc->mem_res)
|
|
bus_release_resource(dev, SYS_RES_IOPORT,
|
|
rman_get_rid(sc->mem_res), sc->mem_res);
|
|
sc->mem_res = 0;
|
|
if (sc->irq_res)
|
|
bus_release_resource(dev, SYS_RES_IRQ,
|
|
rman_get_rid(sc->irq_res), sc->irq_res);
|
|
sc->irq_res = 0;
|
|
return;
|
|
}
|
|
|
|
static void
|
|
at91_pio_intr(void *xsc)
|
|
{
|
|
struct at91_pio_softc *sc = xsc;
|
|
#if 0
|
|
uint32_t status;
|
|
|
|
/* Reading the status also clears the interrupt */
|
|
status = RD4(sc, PIO_SR);
|
|
if (status == 0)
|
|
return;
|
|
AT91_PIO_LOCK(sc);
|
|
AT91_PIO_UNLOCK(sc);
|
|
#endif
|
|
wakeup(sc);
|
|
return;
|
|
}
|
|
|
|
static int
|
|
at91_pio_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
|
|
sc = CDEV2SOFTC(dev);
|
|
AT91_PIO_LOCK(sc);
|
|
if (!(sc->flags & OPENED)) {
|
|
sc->flags |= OPENED;
|
|
#if 0
|
|
// Enable interrupts
|
|
#endif
|
|
}
|
|
AT91_PIO_UNLOCK(sc);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
at91_pio_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
|
|
sc = CDEV2SOFTC(dev);
|
|
AT91_PIO_LOCK(sc);
|
|
sc->flags &= ~OPENED;
|
|
#if 0
|
|
// Disable interrupts
|
|
#endif
|
|
AT91_PIO_UNLOCK(sc);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
at91_pio_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
|
|
struct thread *td)
|
|
{
|
|
return (ENXIO);
|
|
}
|
|
|
|
static device_method_t at91_pio_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, at91_pio_probe),
|
|
DEVMETHOD(device_attach, at91_pio_attach),
|
|
DEVMETHOD(device_detach, at91_pio_detach),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t at91_pio_driver = {
|
|
"at91_pio",
|
|
at91_pio_methods,
|
|
sizeof(struct at91_pio_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(at91_pio, atmelarm, at91_pio_driver, at91_pio_devclass, 0, 0);
|