117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/* $NetBSD: pl061.c,v 1.1 2018/10/15 23:50:48 jmcneill Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2018 Jonathan A. Kollasch
|
|
* 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: pl061.c,v 1.1 2018/10/15 23:50:48 jmcneill Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/device.h>
|
|
#include <sys/intr.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/kmem.h>
|
|
#include <sys/gpio.h>
|
|
|
|
#include <dev/gpio/gpiovar.h>
|
|
#include "gpio.h"
|
|
|
|
#include <dev/ic/pl061reg.h>
|
|
#include <dev/ic/pl061var.h>
|
|
|
|
void
|
|
plgpio_attach(struct plgpio_softc *sc)
|
|
{
|
|
struct gpiobus_attach_args gba;
|
|
u_int pin;
|
|
|
|
sc->sc_gc.gp_cookie = sc;
|
|
sc->sc_gc.gp_pin_read = plgpio_pin_read;
|
|
sc->sc_gc.gp_pin_write = plgpio_pin_write;
|
|
sc->sc_gc.gp_pin_ctl = plgpio_pin_ctl;
|
|
|
|
const uint32_t cnf = PLGPIO_READ(sc, PL061_GPIOAFSEL_REG);
|
|
|
|
for (pin = 0; pin < 8; pin++) {
|
|
sc->sc_pins[pin].pin_num = pin;
|
|
/* skip pins in hardware control mode */
|
|
if ((cnf & __BIT(pin)) != 0)
|
|
continue;
|
|
sc->sc_pins[pin].pin_caps =
|
|
GPIO_PIN_INPUT | GPIO_PIN_OUTPUT |
|
|
GPIO_PIN_TRISTATE;
|
|
sc->sc_pins[pin].pin_state =
|
|
plgpio_pin_read(sc, pin);
|
|
}
|
|
|
|
memset(&gba, 0, sizeof(gba));
|
|
gba.gba_gc = &sc->sc_gc;
|
|
gba.gba_pins = sc->sc_pins;
|
|
gba.gba_npins = 8;
|
|
|
|
#if NGPIO > 0
|
|
(void)config_found_ia(sc->sc_dev, "gpiobus", &gba,
|
|
gpiobus_print);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
plgpio_pin_read(void *priv, int pin)
|
|
{
|
|
struct plgpio_softc * const sc = priv;
|
|
|
|
const uint32_t v = PLGPIO_READ(sc, PL061_GPIODATA_REG(1<<pin));
|
|
|
|
return (v >> pin) & 1;
|
|
}
|
|
|
|
void
|
|
plgpio_pin_write(void *priv, int pin, int val)
|
|
{
|
|
struct plgpio_softc * const sc = priv;
|
|
|
|
PLGPIO_WRITE(sc, PL061_GPIODATA_REG(1 << pin), val << pin);
|
|
}
|
|
|
|
void
|
|
plgpio_pin_ctl(void *priv, int pin, int flags)
|
|
{
|
|
struct plgpio_softc * const sc = priv;
|
|
uint32_t v;
|
|
|
|
if (flags & GPIO_PIN_INPUT) {
|
|
v = PLGPIO_READ(sc, PL061_GPIODIR_REG);
|
|
v &= ~(1 << pin);
|
|
PLGPIO_WRITE(sc, PL061_GPIODIR_REG, v);
|
|
} else if (flags & GPIO_PIN_OUTPUT) {
|
|
v = PLGPIO_READ(sc, PL061_GPIODIR_REG);
|
|
v |= (1 << pin);
|
|
PLGPIO_WRITE(sc, PL061_GPIODIR_REG, v);
|
|
}
|
|
}
|