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      1 /*	$NetBSD: i80321_gpio.c,v 1.3 2011/07/01 20:32:51 dyoung Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2003 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * Intel i80321 I/O Processor general purpose I/O support.
     40  */
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 
     45 #include <sys/bus.h>
     46 
     47 #include <arm/xscale/i80321reg.h>
     48 #include <arm/xscale/i80321var.h>
     49 
     50 /*
     51  * i80321_gpio_set_direction:
     52  *
     53  *	Set the direction of the indicated GPIO pins (1 == output).
     54  */
     55 void
     56 i80321_gpio_set_direction(uint8_t which, uint8_t val)
     57 {
     58 	struct i80321_softc *sc = i80321_softc;
     59 
     60 	sc->sc_gpio_dir = (sc->sc_gpio_dir & ~which) | val;
     61 	bus_space_write_1(sc->sc_st, sc->sc_sh, ICU_GPOE, ~sc->sc_gpio_dir);
     62 }
     63 
     64 /*
     65  * i80321_gpio_set_val:
     66  *
     67  *	Set the value of the indicated GPIO pins.
     68  */
     69 void
     70 i80321_gpio_set_val(uint8_t which, uint8_t val)
     71 {
     72 	struct i80321_softc *sc = i80321_softc;
     73 
     74 	sc->sc_gpio_val = (sc->sc_gpio_val & ~which) | val;
     75 	bus_space_write_1(sc->sc_st, sc->sc_sh, ICU_GPOD, sc->sc_gpio_val);
     76 }
     77 
     78 /*
     79  * i80321_gpio_get_val:
     80  *
     81  *	Get the current state of the GPIO pins.
     82  */
     83 uint8_t
     84 i80321_gpio_get_val(void)
     85 {
     86 	struct i80321_softc *sc = i80321_softc;
     87 
     88 	return (bus_space_read_1(sc->sc_st, sc->sc_sh, ICU_GPID));
     89 }
     90