654 lines
15 KiB
C
654 lines
15 KiB
C
/*-
|
|
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
|
|
* Copyright (C) 2012 Ian Lepore. 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 AUTHOR 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 AUTHOR 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.
|
|
*/
|
|
|
|
#include "opt_platform.h"
|
|
|
|
#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/poll.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/selinfo.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/uio.h>
|
|
#include <machine/at91_gpio.h>
|
|
#include <machine/bus.h>
|
|
|
|
#include <arm/at91/at91reg.h>
|
|
#include <arm/at91/at91_pioreg.h>
|
|
#include <arm/at91/at91_piovar.h>
|
|
|
|
#ifdef FDT
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
#endif
|
|
|
|
#define MAX_CHANGE 64
|
|
|
|
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 sx sc_mtx; /* basically a perimeter lock */
|
|
struct cdev *cdev;
|
|
struct selinfo selp;
|
|
int buflen;
|
|
uint8_t buf[MAX_CHANGE];
|
|
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) sx_xlock(&(_sc)->sc_mtx)
|
|
#define AT91_PIO_UNLOCK(_sc) sx_xunlock(&(_sc)->sc_mtx)
|
|
#define AT91_PIO_LOCK_INIT(_sc) \
|
|
sx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev))
|
|
#define AT91_PIO_LOCK_DESTROY(_sc) sx_destroy(&_sc->sc_mtx);
|
|
#define AT91_PIO_ASSERT_LOCKED(_sc) sx_assert(&_sc->sc_mtx, SA_XLOCKED);
|
|
#define AT91_PIO_ASSERT_UNLOCKED(_sc) sx_assert(&_sc->sc_mtx, SA_UNLOCKED);
|
|
#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_read_t at91_pio_read;
|
|
static d_poll_t at91_pio_poll;
|
|
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_read = at91_pio_read,
|
|
.d_poll = at91_pio_poll,
|
|
.d_ioctl = at91_pio_ioctl
|
|
};
|
|
|
|
static int
|
|
at91_pio_probe(device_t dev)
|
|
{
|
|
const char *name;
|
|
#ifdef FDT
|
|
if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-gpio"))
|
|
return (ENXIO);
|
|
#endif
|
|
switch (device_get_unit(dev)) {
|
|
case 0:
|
|
name = "PIOA";
|
|
break;
|
|
case 1:
|
|
name = "PIOB";
|
|
break;
|
|
case 2:
|
|
name = "PIOC";
|
|
break;
|
|
case 3:
|
|
name = "PIOD";
|
|
break;
|
|
case 4:
|
|
name = "PIOE";
|
|
break;
|
|
case 5:
|
|
name = "PIOF";
|
|
break;
|
|
default:
|
|
name = "PIO";
|
|
break;
|
|
}
|
|
device_set_desc(dev, name);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
at91_pio_attach(device_t dev)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
int err;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->dev = dev;
|
|
err = at91_pio_activate(dev);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (bootverbose)
|
|
device_printf(dev, "ABSR: %#x OSR: %#x PSR:%#x ODSR: %#x\n",
|
|
RD4(sc, PIO_ABSR), RD4(sc, PIO_OSR), RD4(sc, PIO_PSR),
|
|
RD4(sc, PIO_ODSR));
|
|
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,
|
|
NULL, 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 = NULL;
|
|
bus_generic_detach(sc->dev);
|
|
if (sc->mem_res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY,
|
|
rman_get_rid(sc->mem_res), sc->mem_res);
|
|
sc->mem_res = NULL;
|
|
if (sc->irq_res)
|
|
bus_release_resource(dev, SYS_RES_IRQ,
|
|
rman_get_rid(sc->irq_res), sc->irq_res);
|
|
sc->irq_res = NULL;
|
|
}
|
|
|
|
static void
|
|
at91_pio_intr(void *xsc)
|
|
{
|
|
struct at91_pio_softc *sc = xsc;
|
|
uint32_t status;
|
|
int i;
|
|
|
|
/* Reading the status also clears the interrupt. */
|
|
status = RD4(sc, PIO_ISR) & RD4(sc, PIO_IMR);
|
|
if (status != 0) {
|
|
AT91_PIO_LOCK(sc);
|
|
for (i = 0; status != 0 && sc->buflen < MAX_CHANGE; ++i) {
|
|
if (status & 1)
|
|
sc->buf[sc->buflen++] = (uint8_t)i;
|
|
status >>= 1;
|
|
}
|
|
AT91_PIO_UNLOCK(sc);
|
|
wakeup(sc);
|
|
selwakeup(&sc->selp);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
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;
|
|
AT91_PIO_UNLOCK(sc);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
at91_pio_poll(struct cdev *dev, int events, struct thread *td)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
int revents = 0;
|
|
|
|
sc = CDEV2SOFTC(dev);
|
|
AT91_PIO_LOCK(sc);
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
|
if (sc->buflen != 0)
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
else
|
|
selrecord(td, &sc->selp);
|
|
}
|
|
AT91_PIO_UNLOCK(sc);
|
|
|
|
return (revents);
|
|
}
|
|
|
|
static int
|
|
at91_pio_read(struct cdev *dev, struct uio *uio, int flag)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
int err, ret, len;
|
|
|
|
sc = CDEV2SOFTC(dev);
|
|
AT91_PIO_LOCK(sc);
|
|
err = 0;
|
|
ret = 0;
|
|
while (uio->uio_resid) {
|
|
while (sc->buflen == 0 && err == 0)
|
|
err = msleep(sc, &sc->sc_mtx, PCATCH | PZERO, "prd", 0);
|
|
if (err != 0)
|
|
break;
|
|
len = MIN(sc->buflen, uio->uio_resid);
|
|
err = uiomove(sc->buf, len, uio);
|
|
if (err != 0)
|
|
break;
|
|
/*
|
|
* If we read the whole thing no datacopy is needed,
|
|
* otherwise we move the data down.
|
|
*/
|
|
ret += len;
|
|
if (sc->buflen == len)
|
|
sc->buflen = 0;
|
|
else {
|
|
bcopy(sc->buf + len, sc->buf, sc->buflen - len);
|
|
sc->buflen -= len;
|
|
}
|
|
/* If there's no data left, end the read. */
|
|
if (sc->buflen == 0)
|
|
break;
|
|
}
|
|
AT91_PIO_UNLOCK(sc);
|
|
return (err);
|
|
}
|
|
|
|
static void
|
|
at91_pio_bang32(struct at91_pio_softc *sc, uint32_t bits, uint32_t datapin,
|
|
uint32_t clockpin)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 32; i++) {
|
|
if (bits & 0x80000000)
|
|
WR4(sc, PIO_SODR, datapin);
|
|
else
|
|
WR4(sc, PIO_CODR, datapin);
|
|
bits <<= 1;
|
|
WR4(sc, PIO_CODR, clockpin);
|
|
WR4(sc, PIO_SODR, clockpin);
|
|
}
|
|
}
|
|
|
|
static void
|
|
at91_pio_bang(struct at91_pio_softc *sc, uint8_t bits, uint32_t bitcount,
|
|
uint32_t datapin, uint32_t clockpin)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < bitcount; i++) {
|
|
if (bits & 0x80)
|
|
WR4(sc, PIO_SODR, datapin);
|
|
else
|
|
WR4(sc, PIO_CODR, datapin);
|
|
bits <<= 1;
|
|
WR4(sc, PIO_CODR, clockpin);
|
|
WR4(sc, PIO_SODR, clockpin);
|
|
}
|
|
}
|
|
|
|
static int
|
|
at91_pio_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
|
|
struct thread *td)
|
|
{
|
|
struct at91_pio_softc *sc;
|
|
struct at91_gpio_cfg *cfg;
|
|
struct at91_gpio_info *info;
|
|
struct at91_gpio_bang *bang;
|
|
struct at91_gpio_bang_many *bangmany;
|
|
uint32_t i, num;
|
|
uint8_t many[1024], *walker;
|
|
int err;
|
|
int bitcount;
|
|
|
|
sc = CDEV2SOFTC(dev);
|
|
switch(cmd) {
|
|
case AT91_GPIO_SET: /* turn bits on */
|
|
WR4(sc, PIO_SODR, *(uint32_t *)data);
|
|
return (0);
|
|
case AT91_GPIO_CLR: /* turn bits off */
|
|
WR4(sc, PIO_CODR, *(uint32_t *)data);
|
|
return (0);
|
|
case AT91_GPIO_READ: /* Get the status of input bits */
|
|
*(uint32_t *)data = RD4(sc, PIO_PDSR);
|
|
return (0);
|
|
case AT91_GPIO_CFG: /* Configure AT91_GPIO pins */
|
|
cfg = (struct at91_gpio_cfg *)data;
|
|
if (cfg->cfgmask & AT91_GPIO_CFG_INPUT) {
|
|
WR4(sc, PIO_OER, cfg->iomask & ~cfg->input);
|
|
WR4(sc, PIO_ODR, cfg->iomask & cfg->input);
|
|
}
|
|
if (cfg->cfgmask & AT91_GPIO_CFG_HI_Z) {
|
|
WR4(sc, PIO_MDDR, cfg->iomask & ~cfg->hi_z);
|
|
WR4(sc, PIO_MDER, cfg->iomask & cfg->hi_z);
|
|
}
|
|
if (cfg->cfgmask & AT91_GPIO_CFG_PULLUP) {
|
|
WR4(sc, PIO_PUDR, cfg->iomask & ~cfg->pullup);
|
|
WR4(sc, PIO_PUER, cfg->iomask & cfg->pullup);
|
|
}
|
|
if (cfg->cfgmask & AT91_GPIO_CFG_GLITCH) {
|
|
WR4(sc, PIO_IFDR, cfg->iomask & ~cfg->glitch);
|
|
WR4(sc, PIO_IFER, cfg->iomask & cfg->glitch);
|
|
}
|
|
if (cfg->cfgmask & AT91_GPIO_CFG_GPIO) {
|
|
WR4(sc, PIO_PDR, cfg->iomask & ~cfg->gpio);
|
|
WR4(sc, PIO_PER, cfg->iomask & cfg->gpio);
|
|
}
|
|
if (cfg->cfgmask & AT91_GPIO_CFG_PERIPH) {
|
|
WR4(sc, PIO_ASR, cfg->iomask & ~cfg->periph);
|
|
WR4(sc, PIO_BSR, cfg->iomask & cfg->periph);
|
|
}
|
|
if (cfg->cfgmask & AT91_GPIO_CFG_INTR) {
|
|
WR4(sc, PIO_IDR, cfg->iomask & ~cfg->intr);
|
|
WR4(sc, PIO_IER, cfg->iomask & cfg->intr);
|
|
}
|
|
return (0);
|
|
case AT91_GPIO_BANG:
|
|
bang = (struct at91_gpio_bang *)data;
|
|
at91_pio_bang32(sc, bang->bits, bang->datapin, bang->clockpin);
|
|
return (0);
|
|
case AT91_GPIO_BANG_MANY:
|
|
bangmany = (struct at91_gpio_bang_many *)data;
|
|
walker = (uint8_t *)bangmany->bits;
|
|
bitcount = bangmany->numbits;
|
|
while (bitcount > 0) {
|
|
num = MIN((bitcount + 7) / 8, sizeof(many));
|
|
err = copyin(walker, many, num);
|
|
if (err)
|
|
return err;
|
|
for (i = 0; i < num && bitcount > 0; i++, bitcount -= 8)
|
|
if (bitcount >= 8)
|
|
at91_pio_bang(sc, many[i], 8, bangmany->datapin, bangmany->clockpin);
|
|
else
|
|
at91_pio_bang(sc, many[i], bitcount, bangmany->datapin, bangmany->clockpin);
|
|
walker += num;
|
|
}
|
|
return (0);
|
|
case AT91_GPIO_INFO: /* Learn about this device's AT91_GPIO bits */
|
|
info = (struct at91_gpio_info *)data;
|
|
info->output_status = RD4(sc, PIO_ODSR);
|
|
info->input_status = RD4(sc, PIO_OSR);
|
|
info->highz_status = RD4(sc, PIO_MDSR);
|
|
info->pullup_status = RD4(sc, PIO_PUSR);
|
|
info->glitch_status = RD4(sc, PIO_IFSR);
|
|
info->enabled_status = RD4(sc, PIO_PSR);
|
|
info->periph_status = RD4(sc, PIO_ABSR);
|
|
info->intr_status = RD4(sc, PIO_IMR);
|
|
memset(info->extra_status, 0, sizeof(info->extra_status));
|
|
return (0);
|
|
}
|
|
return (ENOTTY);
|
|
}
|
|
|
|
/*
|
|
* The following functions are called early in the boot process, so
|
|
* don't use bus_space, as that isn't yet available when we need to use
|
|
* them.
|
|
*/
|
|
|
|
void
|
|
at91_pio_use_periph_a(uint32_t pio, uint32_t periph_a_mask, int use_pullup)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
PIO[PIO_ASR / 4] = periph_a_mask;
|
|
PIO[PIO_PDR / 4] = periph_a_mask;
|
|
if (use_pullup)
|
|
PIO[PIO_PUER / 4] = periph_a_mask;
|
|
else
|
|
PIO[PIO_PUDR / 4] = periph_a_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_use_periph_b(uint32_t pio, uint32_t periph_b_mask, int use_pullup)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
PIO[PIO_BSR / 4] = periph_b_mask;
|
|
PIO[PIO_PDR / 4] = periph_b_mask;
|
|
if (use_pullup)
|
|
PIO[PIO_PUER / 4] = periph_b_mask;
|
|
else
|
|
PIO[PIO_PUDR / 4] = periph_b_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_use_gpio(uint32_t pio, uint32_t gpio_mask)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
PIO[PIO_PER / 4] = gpio_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_input(uint32_t pio, uint32_t input_enable_mask)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
PIO[PIO_ODR / 4] = input_enable_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_output(uint32_t pio, uint32_t output_enable_mask, int use_pullup)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
PIO[PIO_OER / 4] = output_enable_mask;
|
|
if (use_pullup)
|
|
PIO[PIO_PUER / 4] = output_enable_mask;
|
|
else
|
|
PIO[PIO_PUDR / 4] = output_enable_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_high_z(uint32_t pio, uint32_t high_z_mask, int enable)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
if (enable)
|
|
PIO[PIO_MDER / 4] = high_z_mask;
|
|
else
|
|
PIO[PIO_MDDR / 4] = high_z_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_set(uint32_t pio, uint32_t data_mask)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
PIO[PIO_SODR / 4] = data_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_clear(uint32_t pio, uint32_t data_mask)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
PIO[PIO_CODR / 4] = data_mask;
|
|
}
|
|
|
|
uint32_t
|
|
at91_pio_gpio_get(uint32_t pio, uint32_t data_mask)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
return (PIO[PIO_PDSR / 4] & data_mask);
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_set_deglitch(uint32_t pio, uint32_t data_mask, int use_deglitch)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
if (use_deglitch)
|
|
PIO[PIO_IFER / 4] = data_mask;
|
|
else
|
|
PIO[PIO_IFDR / 4] = data_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_pullup(uint32_t pio, uint32_t data_mask, int do_pullup)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
if (do_pullup)
|
|
PIO[PIO_PUER / 4] = data_mask;
|
|
else
|
|
PIO[PIO_PUDR / 4] = data_mask;
|
|
}
|
|
|
|
void
|
|
at91_pio_gpio_set_interrupt(uint32_t pio, uint32_t data_mask,
|
|
int enable_interrupt)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
if (enable_interrupt)
|
|
PIO[PIO_IER / 4] = data_mask;
|
|
else
|
|
PIO[PIO_IDR / 4] = data_mask;
|
|
}
|
|
|
|
uint32_t
|
|
at91_pio_gpio_clear_interrupt(uint32_t pio)
|
|
{
|
|
uint32_t *PIO = (uint32_t *)(AT91_BASE + pio);
|
|
|
|
/* Reading this register will clear the interrupts. */
|
|
return (PIO[PIO_ISR / 4]);
|
|
}
|
|
|
|
static void
|
|
at91_pio_new_pass(device_t dev)
|
|
{
|
|
|
|
device_printf(dev, "Pass %d\n", bus_current_pass);
|
|
}
|
|
|
|
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),
|
|
|
|
DEVMETHOD(bus_new_pass, at91_pio_new_pass),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t at91_pio_driver = {
|
|
"at91_pio",
|
|
at91_pio_methods,
|
|
sizeof(struct at91_pio_softc),
|
|
};
|
|
|
|
#ifdef FDT
|
|
EARLY_DRIVER_MODULE(at91_pio, at91_pinctrl, at91_pio_driver, at91_pio_devclass,
|
|
NULL, NULL, BUS_PASS_INTERRUPT);
|
|
#else
|
|
DRIVER_MODULE(at91_pio, atmelarm, at91_pio_driver, at91_pio_devclass, NULL, NULL);
|
|
#endif
|