e8da3e8aaf
property for devices that doesn't descend directly from gpiobus. The parser supports multiple pins, different GPIO controllers and can use arbitrary names for the property (to match the many linux variants: cd-gpios, power-gpios, wp-gpios, etc.). Pass the driver name on ofw_gpiobus_add_fdt_child(). Update gpioled to match. An usage example of ofw_gpiobus_parse_gpios() will follow soon.
117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/*-
|
|
* Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@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.
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
#ifndef __GPIOBUS_H__
|
|
#define __GPIOBUS_H__
|
|
|
|
#include "opt_platform.h"
|
|
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/rman.h>
|
|
|
|
#ifdef FDT
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
#endif
|
|
|
|
#include "gpio_if.h"
|
|
|
|
#ifdef FDT
|
|
#define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) \
|
|
&((struct ofw_gpiobus_devinfo *)device_get_ivars(d))->opd_dinfo
|
|
#else
|
|
#define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) device_get_ivars(d)
|
|
#endif
|
|
#define GPIOBUS_SOFTC(d) (struct gpiobus_softc *) device_get_softc(d)
|
|
#define GPIOBUS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
|
|
#define GPIOBUS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
|
|
#define GPIOBUS_LOCK_INIT(_sc) mtx_init(&_sc->sc_mtx, \
|
|
device_get_nameunit(_sc->sc_dev), "gpiobus", MTX_DEF)
|
|
#define GPIOBUS_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx)
|
|
#define GPIOBUS_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED)
|
|
#define GPIOBUS_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED)
|
|
|
|
#define GPIOBUS_WAIT 1
|
|
#define GPIOBUS_DONTWAIT 2
|
|
|
|
struct gpiobus_softc
|
|
{
|
|
struct mtx sc_mtx; /* bus mutex */
|
|
struct rman sc_intr_rman; /* isr resources */
|
|
device_t sc_busdev; /* bus device */
|
|
device_t sc_owner; /* bus owner */
|
|
device_t sc_dev; /* driver device */
|
|
int sc_npins; /* total pins on bus */
|
|
int *sc_pins_mapped; /* mark mapped pins */
|
|
};
|
|
|
|
struct gpiobus_pin
|
|
{
|
|
device_t dev; /* gpio device */
|
|
uint32_t flags; /* pin flags */
|
|
uint32_t pin; /* pin number */
|
|
};
|
|
|
|
struct gpiobus_ivar
|
|
{
|
|
struct resource_list rl; /* isr resource list */
|
|
uint32_t npins; /* pins total */
|
|
uint32_t *flags; /* pins flags */
|
|
uint32_t *pins; /* pins map */
|
|
};
|
|
|
|
#ifdef FDT
|
|
struct ofw_gpiobus_devinfo {
|
|
struct gpiobus_ivar opd_dinfo;
|
|
struct ofw_bus_devinfo opd_obdinfo;
|
|
};
|
|
|
|
static __inline int
|
|
gpio_map_gpios(device_t bus, phandle_t dev, phandle_t gparent, int gcells,
|
|
pcell_t *gpios, uint32_t *pin, uint32_t *flags)
|
|
{
|
|
return (GPIO_MAP_GPIOS(bus, dev, gparent, gcells, gpios, pin, flags));
|
|
}
|
|
|
|
device_t ofw_gpiobus_add_fdt_child(device_t, const char *, phandle_t);
|
|
int ofw_gpiobus_parse_gpios(device_t, char *, struct gpiobus_pin **);
|
|
void ofw_gpiobus_register_provider(device_t);
|
|
void ofw_gpiobus_unregister_provider(device_t);
|
|
#endif
|
|
int gpio_check_flags(uint32_t, uint32_t);
|
|
device_t gpiobus_attach_bus(device_t);
|
|
int gpiobus_detach_bus(device_t);
|
|
int gpiobus_init_softc(device_t);
|
|
int gpiobus_alloc_ivars(struct gpiobus_ivar *);
|
|
void gpiobus_free_ivars(struct gpiobus_ivar *);
|
|
|
|
extern driver_t gpiobus_driver;
|
|
|
|
#endif /* __GPIOBUS_H__ */
|