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      1 /*	$NetBSD: i80312_gpio.c,v 1.4 2011/07/01 20:32:51 dyoung Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 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 i80312 Companion I/O general purpose I/O support.
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: i80312_gpio.c,v 1.4 2011/07/01 20:32:51 dyoung Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 
     48 #include <sys/bus.h>
     49 
     50 #include <arm/xscale/i80312reg.h>
     51 #include <arm/xscale/i80312var.h>
     52 
     53 /*
     54  * i80312_gpio_set_direction:
     55  *
     56  *	Set the direction of the indicated GPIO pins (1 == output).
     57  */
     58 void
     59 i80312_gpio_set_direction(uint8_t which, uint8_t val)
     60 {
     61 	struct i80312_softc *sc = i80312_softc;
     62 
     63 	sc->sc_gpio_dir = (sc->sc_gpio_dir & ~which) | val;
     64 	bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOE,
     65 	    ~sc->sc_gpio_dir);
     66 }
     67 
     68 /*
     69  * i80312_gpio_set_val:
     70  *
     71  *	Set the value of the indicated GPIO pins.
     72  */
     73 void
     74 i80312_gpio_set_val(uint8_t which, uint8_t val)
     75 {
     76 	struct i80312_softc *sc = i80312_softc;
     77 
     78 	sc->sc_gpio_val = (sc->sc_gpio_val & ~which) | val;
     79 	bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOD,
     80 	    ~sc->sc_gpio_val);
     81 }
     82 
     83 /*
     84  * i80312_gpio_get_val:
     85  *
     86  *	Get the current state of the GPIO pins.
     87  */
     88 uint8_t
     89 i80312_gpio_get_val(void)
     90 {
     91 	struct i80312_softc *sc = i80312_softc;
     92 
     93 	return (bus_space_read_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GID));
     94 }
     95