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/*-
* Copyright (c) 2012 Damjan Marion <dmarion@FreeBSD.org>
* Copyright (c) 2014 Andrew Turner <andrew@FreeBSD.org>
* 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 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 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/intr.h>
#include <sys/gpio.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <arm/ti/ti_cpuid.h>
#include <arm/ti/ti_gpio.h>
#include <arm/ti/ti_pinmux.h>
#include <arm/ti/am335x/am335x_scm_padconf.h>
#include "ti_gpio_if.h"
static struct ofw_compat_data compat_data[] = {
{"ti,am335x-gpio", 1},
/* Linux uses ti,omap4-gpio on am335x so we need to support it */
{"ti,omap4-gpio", 1},
{"ti,gpio", 1},
{NULL, 0},
};
static int
am335x_gpio_probe(device_t dev)
{
if (ti_chip() != CHIP_AM335X)
return (ENXIO);
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
device_set_desc(dev, "TI AM335x General Purpose I/O (GPIO)");
return (0);
}
static int
am335x_gpio_set_flags(device_t dev, uint32_t gpio, uint32_t flags)
{
unsigned int state = 0;
struct ti_gpio_softc *sc = device_get_softc(dev);
if (flags & GPIO_PIN_OUTPUT) {
if (flags & GPIO_PIN_PULLUP)
state = PADCONF_OUTPUT_PULLUP;
else
state = PADCONF_OUTPUT;
} else if (flags & GPIO_PIN_INPUT) {
if (flags & GPIO_PIN_PULLUP)
state = PADCONF_INPUT_PULLUP;
else if (flags & GPIO_PIN_PULLDOWN)
state = PADCONF_INPUT_PULLDOWN;
else
state = PADCONF_INPUT;
}
return ti_pinmux_padconf_set_gpiomode(sc->sc_bank*32 + gpio, state);
}
static int
am335x_gpio_get_flags(device_t dev, uint32_t gpio, uint32_t *flags)
{
unsigned int state;
struct ti_gpio_softc *sc = device_get_softc(dev);
if (ti_pinmux_padconf_get_gpiomode(sc->sc_bank*32 + gpio, &state) != 0) {
*flags = 0;
return (EINVAL);
} else {
switch (state) {
case PADCONF_OUTPUT:
*flags = GPIO_PIN_OUTPUT;
break;
case PADCONF_OUTPUT_PULLUP:
*flags = GPIO_PIN_OUTPUT | GPIO_PIN_PULLUP;
break;
case PADCONF_INPUT:
*flags = GPIO_PIN_INPUT;
break;
case PADCONF_INPUT_PULLUP:
*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
break;
case PADCONF_INPUT_PULLDOWN:
*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
break;
default:
*flags = 0;
break;
}
}
return (0);
}
static device_method_t am335x_gpio_methods[] = {
/* bus interface */
DEVMETHOD(device_probe, am335x_gpio_probe),
/* ti_gpio interface */
DEVMETHOD(ti_gpio_set_flags, am335x_gpio_set_flags),
DEVMETHOD(ti_gpio_get_flags, am335x_gpio_get_flags),
DEVMETHOD_END
};
extern driver_t ti_gpio_driver;
static devclass_t am335x_gpio_devclass;
DEFINE_CLASS_1(gpio, am335x_gpio_driver, am335x_gpio_methods,
sizeof(struct ti_gpio_softc), ti_gpio_driver);
DRIVER_MODULE(am335x_gpio, simplebus, am335x_gpio_driver, am335x_gpio_devclass,
0, 0);
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