d752f0f69d
When a gpiobus child is added, use its name to identify the mapped pin names. Make the respective changes to libgpio. Add a new '-n' flag to gpioctl(8) to set the pin name. Differential Revision: https://reviews.freebsd.org/D2002 Reviewed by: rpaulo Requested by: many
124 lines
3.9 KiB
C
124 lines
3.9 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_pin_data
|
|
{
|
|
int mapped; /* pin is mapped/reserved. */
|
|
char *name; /* pin name. */
|
|
};
|
|
|
|
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 */
|
|
struct gpiobus_pin_data *sc_pins; /* pin data */
|
|
};
|
|
|
|
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 *);
|
|
int gpiobus_map_pin(device_t, uint32_t);
|
|
|
|
extern driver_t gpiobus_driver;
|
|
|
|
#endif /* __GPIOBUS_H__ */
|