6d866ed35b
describe GPIO bindings in the system. Move the GPIOBUS lock macros to gpiobusvar.h as they are now shared between the OFW and the non OFW versions of GPIO bus. Export gpiobus_print_pins() so it can also be used on the OFW GPIO bus. Approved by: adrian (mentor, implicit)
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/*-
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* Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#ifndef __GPIOBUS_H__
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#define __GPIOBUS_H__
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#include "opt_platform.h"
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#ifdef FDT
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#include <dev/ofw/ofw_bus_subr.h>
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#endif
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#define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) device_get_ivars(d)
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#define GPIOBUS_SOFTC(d) (struct gpiobus_softc *) device_get_softc(d)
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#define GPIOBUS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
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#define GPIOBUS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
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#define GPIOBUS_LOCK_INIT(_sc) mtx_init(&_sc->sc_mtx, \
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device_get_nameunit(_sc->sc_dev), "gpiobus", MTX_DEF)
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#define GPIOBUS_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx)
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#define GPIOBUS_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED)
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#define GPIOBUS_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED)
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struct gpiobus_softc
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{
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struct mtx sc_mtx; /* bus mutex */
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device_t sc_busdev; /* bus device */
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device_t sc_owner; /* bus owner */
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device_t sc_dev; /* driver device */
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int sc_npins; /* total pins on bus */
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int *sc_pins_mapped; /* mark mapped pins */
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};
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struct gpiobus_ivar
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{
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uint32_t npins; /* pins total */
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uint32_t *pins; /* pins map */
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};
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void gpiobus_print_pins(struct gpiobus_ivar *);
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#ifdef FDT
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device_t ofw_gpiobus_add_fdt_child(device_t, phandle_t);
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#endif
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extern driver_t gpiobus_driver;
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#endif /* __GPIOBUS_H__ */
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