95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/* $NetBSD: i80312_gpio.c,v 1.3 2005/12/11 12:16:51 christos Exp $ */
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/*
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* Copyright (c) 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Intel i80312 Companion I/O general purpose I/O support.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: i80312_gpio.c,v 1.3 2005/12/11 12:16:51 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <arm/xscale/i80312reg.h>
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#include <arm/xscale/i80312var.h>
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/*
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* i80312_gpio_set_direction:
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*
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* Set the direction of the indicated GPIO pins (1 == output).
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*/
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void
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i80312_gpio_set_direction(uint8_t which, uint8_t val)
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{
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struct i80312_softc *sc = i80312_softc;
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sc->sc_gpio_dir = (sc->sc_gpio_dir & ~which) | val;
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bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOE,
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~sc->sc_gpio_dir);
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}
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/*
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* i80312_gpio_set_val:
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*
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* Set the value of the indicated GPIO pins.
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*/
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void
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i80312_gpio_set_val(uint8_t which, uint8_t val)
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{
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struct i80312_softc *sc = i80312_softc;
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sc->sc_gpio_val = (sc->sc_gpio_val & ~which) | val;
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bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOD,
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~sc->sc_gpio_val);
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}
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/*
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* i80312_gpio_get_val:
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*
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* Get the current state of the GPIO pins.
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*/
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uint8_t
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i80312_gpio_get_val(void)
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{
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struct i80312_softc *sc = i80312_softc;
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return (bus_space_read_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GID));
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}
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